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NFSv4.1/pnfs: Fix a close/delegreturn hang when return-on-close is set
[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 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
474}
475
476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
501{
502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
544 if (slot == NULL)
545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
558#if defined(CONFIG_NFS_V4_1)
559
560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
561{
562 struct nfs4_session *session;
563 struct nfs4_slot_table *tbl;
564 struct nfs4_slot *slot = res->sr_slot;
565 bool send_new_highest_used_slotid = false;
566
567 tbl = slot->table;
568 session = tbl->session;
569
570 spin_lock(&tbl->slot_tbl_lock);
571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
581 nfs4_free_slot(tbl, slot);
582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
585out_unlock:
586 spin_unlock(&tbl->slot_tbl_lock);
587 res->sr_slot = NULL;
588 if (send_new_highest_used_slotid)
589 nfs41_notify_server(session->clp);
590}
591
592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
593{
594 struct nfs4_session *session;
595 struct nfs4_slot *slot = res->sr_slot;
596 struct nfs_client *clp;
597 bool interrupted = false;
598 int ret = 1;
599
600 if (slot == NULL)
601 goto out_noaction;
602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
604 goto out;
605
606 session = slot->table->session;
607
608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
613 trace_nfs4_sequence_done(session, res);
614 /* Check the SEQUENCE operation status */
615 switch (res->sr_status) {
616 case 0:
617 /* Update the slot's sequence and clientid lease timer */
618 ++slot->seq_nr;
619 clp = session->clp;
620 do_renew_lease(clp, res->sr_timestamp);
621 /* Check sequence flags */
622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
623 nfs41_update_target_slotid(slot->table, slot, res);
624 break;
625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
640 __func__,
641 slot->slot_nr,
642 slot->seq_nr);
643 goto out_retry;
644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
671 default:
672 /* Just update the slot sequence no. */
673 ++slot->seq_nr;
674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
678 nfs41_sequence_free_slot(res);
679out_noaction:
680 return ret;
681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
687out_retry:
688 if (!rpc_restart_call(task))
689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
692}
693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
694
695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
696{
697 if (res->sr_slot == NULL)
698 return 1;
699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
701 return nfs41_sequence_done(task, res);
702}
703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
704
705int nfs41_setup_sequence(struct nfs4_session *session,
706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
708 struct rpc_task *task)
709{
710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
712
713 dprintk("--> %s\n", __func__);
714 /* slot already allocated? */
715 if (res->sr_slot != NULL)
716 goto out_success;
717
718 tbl = &session->fc_slot_table;
719
720 task->tk_timeout = 0;
721
722 spin_lock(&tbl->slot_tbl_lock);
723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
724 !args->sa_privileged) {
725 /* The state manager will wait until the slot table is empty */
726 dprintk("%s session is draining\n", __func__);
727 goto out_sleep;
728 }
729
730 slot = nfs4_alloc_slot(tbl);
731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
735 dprintk("<-- %s: no free slots\n", __func__);
736 goto out_sleep;
737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
740 args->sa_slot = slot;
741
742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
743 slot->slot_nr, slot->seq_nr);
744
745 res->sr_slot = slot;
746 res->sr_timestamp = jiffies;
747 res->sr_status_flags = 0;
748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
753 trace_nfs4_setup_sequence(session, args);
754out_success:
755 rpc_call_start(task);
756 return 0;
757out_sleep:
758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
766}
767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
768
769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
773{
774 struct nfs4_session *session = nfs4_get_session(server);
775 int ret = 0;
776
777 if (!session)
778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
780
781 dprintk("--> %s clp %p session %p sr_slot %u\n",
782 __func__, session->clp, session, res->sr_slot ?
783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
784
785 ret = nfs41_setup_sequence(session, args, res, task);
786
787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
793 struct nfs4_call_sync_data *data = calldata;
794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
795
796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
799}
800
801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
803 struct nfs4_call_sync_data *data = calldata;
804
805 nfs41_sequence_done(task, data->seq_res);
806}
807
808static const struct rpc_call_ops nfs41_call_sync_ops = {
809 .rpc_call_prepare = nfs41_call_sync_prepare,
810 .rpc_call_done = nfs41_call_sync_done,
811};
812
813#else /* !CONFIG_NFS_V4_1 */
814
815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
822}
823
824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
826{
827 return nfs40_sequence_done(task, res);
828}
829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
830
831#endif /* !CONFIG_NFS_V4_1 */
832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
855 struct nfs4_sequence_res *res)
856{
857 int ret;
858 struct rpc_task *task;
859 struct nfs_client *clp = server->nfs_client;
860 struct nfs4_call_sync_data data = {
861 .seq_server = server,
862 .seq_args = args,
863 .seq_res = res,
864 };
865 struct rpc_task_setup task_setup = {
866 .rpc_client = clnt,
867 .rpc_message = msg,
868 .callback_ops = clp->cl_mvops->call_sync_ops,
869 .callback_data = &data
870 };
871
872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
889 nfs4_init_sequence(args, res, cache_reply);
890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
891}
892
893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
894{
895 struct nfs_inode *nfsi = NFS_I(dir);
896
897 spin_lock(&dir->i_lock);
898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
899 if (!cinfo->atomic || cinfo->before != dir->i_version)
900 nfs_force_lookup_revalidate(dir);
901 dir->i_version = cinfo->after;
902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
903 nfs_fscache_invalidate(dir);
904 spin_unlock(&dir->i_lock);
905}
906
907struct nfs4_opendata {
908 struct kref kref;
909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
915 struct nfs4_label *a_label;
916 struct nfs_fattr f_attr;
917 struct nfs4_label *f_label;
918 struct dentry *dir;
919 struct dentry *dentry;
920 struct nfs4_state_owner *owner;
921 struct nfs4_state *state;
922 struct iattr attrs;
923 unsigned long timestamp;
924 unsigned int rpc_done : 1;
925 unsigned int file_created : 1;
926 unsigned int is_recover : 1;
927 int rpc_status;
928 int cancelled;
929};
930
931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
989 p->o_res.f_label = p->f_label;
990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
992 p->o_res.server = p->o_arg.server;
993 p->o_res.access_request = p->o_arg.access;
994 nfs_fattr_init(&p->f_attr);
995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
996}
997
998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1000 const struct iattr *attrs,
1001 struct nfs4_label *label,
1002 enum open_claim_type4 claim,
1003 gfp_t gfp_mask)
1004{
1005 struct dentry *parent = dget_parent(dentry);
1006 struct inode *dir = d_inode(parent);
1007 struct nfs_server *server = NFS_SERVER(dir);
1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1009 struct nfs4_opendata *p;
1010
1011 p = kzalloc(sizeof(*p), gfp_mask);
1012 if (p == NULL)
1013 goto err;
1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1025 if (IS_ERR(p->o_arg.seqid))
1026 goto err_free_label;
1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1043 }
1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1047 p->o_arg.name = &dentry->d_name;
1048 p->o_arg.server = server;
1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
1064 }
1065 if (attrs != NULL && attrs->ia_valid != 0) {
1066 __u32 verf[2];
1067
1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
1075 }
1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
1079 nfs4_init_opendata_res(p);
1080 kref_init(&p->kref);
1081 return p;
1082
1083err_free_label:
1084 nfs4_label_free(p->a_label);
1085err_free_f:
1086 nfs4_label_free(p->f_label);
1087err_free_p:
1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
1094static void nfs4_opendata_free(struct kref *kref)
1095{
1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
1098 struct super_block *sb = p->dentry->d_sb;
1099
1100 nfs_free_seqid(p->o_arg.seqid);
1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
1103 nfs4_put_state_owner(p->owner);
1104
1105 nfs4_label_free(p->a_label);
1106 nfs4_label_free(p->f_label);
1107
1108 dput(p->dir);
1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
1111 nfs_fattr_free_names(&p->f_attr);
1112 kfree(p->f_attr.mdsthreshold);
1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
1120}
1121
1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
1124 int ret;
1125
1126 ret = rpc_wait_for_completion_task(task);
1127 return ret;
1128}
1129
1130static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1131{
1132 int ret = 0;
1133
1134 if (open_mode & (O_EXCL|O_TRUNC))
1135 goto out;
1136 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1137 case FMODE_READ:
1138 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1139 && state->n_rdonly != 0;
1140 break;
1141 case FMODE_WRITE:
1142 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1143 && state->n_wronly != 0;
1144 break;
1145 case FMODE_READ|FMODE_WRITE:
1146 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1147 && state->n_rdwr != 0;
1148 }
1149out:
1150 return ret;
1151}
1152
1153static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1154{
1155 if (delegation == NULL)
1156 return 0;
1157 if ((delegation->type & fmode) != fmode)
1158 return 0;
1159 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1160 return 0;
1161 nfs_mark_delegation_referenced(delegation);
1162 return 1;
1163}
1164
1165static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1166{
1167 switch (fmode) {
1168 case FMODE_WRITE:
1169 state->n_wronly++;
1170 break;
1171 case FMODE_READ:
1172 state->n_rdonly++;
1173 break;
1174 case FMODE_READ|FMODE_WRITE:
1175 state->n_rdwr++;
1176 }
1177 nfs4_state_set_mode_locked(state, state->state | fmode);
1178}
1179
1180static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1181{
1182 struct nfs_client *clp = state->owner->so_server->nfs_client;
1183 bool need_recover = false;
1184
1185 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1186 need_recover = true;
1187 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1188 need_recover = true;
1189 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1190 need_recover = true;
1191 if (need_recover)
1192 nfs4_state_mark_reclaim_nograce(clp, state);
1193}
1194
1195static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1196 nfs4_stateid *stateid)
1197{
1198 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1199 return true;
1200 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1201 nfs_test_and_clear_all_open_stateid(state);
1202 return true;
1203 }
1204 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1205 return true;
1206 return false;
1207}
1208
1209static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1210{
1211 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1212 return;
1213 if (state->n_wronly)
1214 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1215 if (state->n_rdonly)
1216 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1217 if (state->n_rdwr)
1218 set_bit(NFS_O_RDWR_STATE, &state->flags);
1219 set_bit(NFS_OPEN_STATE, &state->flags);
1220}
1221
1222static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1223 nfs4_stateid *stateid, fmode_t fmode)
1224{
1225 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1226 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1227 case FMODE_WRITE:
1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1229 break;
1230 case FMODE_READ:
1231 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1232 break;
1233 case 0:
1234 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1235 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1236 clear_bit(NFS_OPEN_STATE, &state->flags);
1237 }
1238 if (stateid == NULL)
1239 return;
1240 /* Handle races with OPEN */
1241 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1242 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1243 nfs_resync_open_stateid_locked(state);
1244 return;
1245 }
1246 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1247 nfs4_stateid_copy(&state->stateid, stateid);
1248 nfs4_stateid_copy(&state->open_stateid, stateid);
1249}
1250
1251static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1252{
1253 write_seqlock(&state->seqlock);
1254 nfs_clear_open_stateid_locked(state, stateid, fmode);
1255 write_sequnlock(&state->seqlock);
1256 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1257 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1258}
1259
1260static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1261{
1262 switch (fmode) {
1263 case FMODE_READ:
1264 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 break;
1266 case FMODE_WRITE:
1267 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1268 break;
1269 case FMODE_READ|FMODE_WRITE:
1270 set_bit(NFS_O_RDWR_STATE, &state->flags);
1271 }
1272 if (!nfs_need_update_open_stateid(state, stateid))
1273 return;
1274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1275 nfs4_stateid_copy(&state->stateid, stateid);
1276 nfs4_stateid_copy(&state->open_stateid, stateid);
1277}
1278
1279static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1280{
1281 /*
1282 * Protect the call to nfs4_state_set_mode_locked and
1283 * serialise the stateid update
1284 */
1285 write_seqlock(&state->seqlock);
1286 if (deleg_stateid != NULL) {
1287 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1288 set_bit(NFS_DELEGATED_STATE, &state->flags);
1289 }
1290 if (open_stateid != NULL)
1291 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1292 write_sequnlock(&state->seqlock);
1293 spin_lock(&state->owner->so_lock);
1294 update_open_stateflags(state, fmode);
1295 spin_unlock(&state->owner->so_lock);
1296}
1297
1298static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1299{
1300 struct nfs_inode *nfsi = NFS_I(state->inode);
1301 struct nfs_delegation *deleg_cur;
1302 int ret = 0;
1303
1304 fmode &= (FMODE_READ|FMODE_WRITE);
1305
1306 rcu_read_lock();
1307 deleg_cur = rcu_dereference(nfsi->delegation);
1308 if (deleg_cur == NULL)
1309 goto no_delegation;
1310
1311 spin_lock(&deleg_cur->lock);
1312 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1313 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1314 (deleg_cur->type & fmode) != fmode)
1315 goto no_delegation_unlock;
1316
1317 if (delegation == NULL)
1318 delegation = &deleg_cur->stateid;
1319 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1320 goto no_delegation_unlock;
1321
1322 nfs_mark_delegation_referenced(deleg_cur);
1323 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1324 ret = 1;
1325no_delegation_unlock:
1326 spin_unlock(&deleg_cur->lock);
1327no_delegation:
1328 rcu_read_unlock();
1329
1330 if (!ret && open_stateid != NULL) {
1331 __update_open_stateid(state, open_stateid, NULL, fmode);
1332 ret = 1;
1333 }
1334 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1335 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1336
1337 return ret;
1338}
1339
1340static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1341 const nfs4_stateid *stateid)
1342{
1343 struct nfs4_state *state = lsp->ls_state;
1344 bool ret = false;
1345
1346 spin_lock(&state->state_lock);
1347 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1348 goto out_noupdate;
1349 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1350 goto out_noupdate;
1351 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1352 ret = true;
1353out_noupdate:
1354 spin_unlock(&state->state_lock);
1355 return ret;
1356}
1357
1358static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1359{
1360 struct nfs_delegation *delegation;
1361
1362 rcu_read_lock();
1363 delegation = rcu_dereference(NFS_I(inode)->delegation);
1364 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1365 rcu_read_unlock();
1366 return;
1367 }
1368 rcu_read_unlock();
1369 nfs4_inode_return_delegation(inode);
1370}
1371
1372static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1373{
1374 struct nfs4_state *state = opendata->state;
1375 struct nfs_inode *nfsi = NFS_I(state->inode);
1376 struct nfs_delegation *delegation;
1377 int open_mode = opendata->o_arg.open_flags;
1378 fmode_t fmode = opendata->o_arg.fmode;
1379 nfs4_stateid stateid;
1380 int ret = -EAGAIN;
1381
1382 for (;;) {
1383 spin_lock(&state->owner->so_lock);
1384 if (can_open_cached(state, fmode, open_mode)) {
1385 update_open_stateflags(state, fmode);
1386 spin_unlock(&state->owner->so_lock);
1387 goto out_return_state;
1388 }
1389 spin_unlock(&state->owner->so_lock);
1390 rcu_read_lock();
1391 delegation = rcu_dereference(nfsi->delegation);
1392 if (!can_open_delegated(delegation, fmode)) {
1393 rcu_read_unlock();
1394 break;
1395 }
1396 /* Save the delegation */
1397 nfs4_stateid_copy(&stateid, &delegation->stateid);
1398 rcu_read_unlock();
1399 nfs_release_seqid(opendata->o_arg.seqid);
1400 if (!opendata->is_recover) {
1401 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1402 if (ret != 0)
1403 goto out;
1404 }
1405 ret = -EAGAIN;
1406
1407 /* Try to update the stateid using the delegation */
1408 if (update_open_stateid(state, NULL, &stateid, fmode))
1409 goto out_return_state;
1410 }
1411out:
1412 return ERR_PTR(ret);
1413out_return_state:
1414 atomic_inc(&state->count);
1415 return state;
1416}
1417
1418static void
1419nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1420{
1421 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1422 struct nfs_delegation *delegation;
1423 int delegation_flags = 0;
1424
1425 rcu_read_lock();
1426 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1427 if (delegation)
1428 delegation_flags = delegation->flags;
1429 rcu_read_unlock();
1430 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1431 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1432 "returning a delegation for "
1433 "OPEN(CLAIM_DELEGATE_CUR)\n",
1434 clp->cl_hostname);
1435 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1436 nfs_inode_set_delegation(state->inode,
1437 data->owner->so_cred,
1438 &data->o_res);
1439 else
1440 nfs_inode_reclaim_delegation(state->inode,
1441 data->owner->so_cred,
1442 &data->o_res);
1443}
1444
1445/*
1446 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1447 * and update the nfs4_state.
1448 */
1449static struct nfs4_state *
1450_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1451{
1452 struct inode *inode = data->state->inode;
1453 struct nfs4_state *state = data->state;
1454 int ret;
1455
1456 if (!data->rpc_done) {
1457 if (data->rpc_status) {
1458 ret = data->rpc_status;
1459 goto err;
1460 }
1461 /* cached opens have already been processed */
1462 goto update;
1463 }
1464
1465 ret = nfs_refresh_inode(inode, &data->f_attr);
1466 if (ret)
1467 goto err;
1468
1469 if (data->o_res.delegation_type != 0)
1470 nfs4_opendata_check_deleg(data, state);
1471update:
1472 update_open_stateid(state, &data->o_res.stateid, NULL,
1473 data->o_arg.fmode);
1474 atomic_inc(&state->count);
1475
1476 return state;
1477err:
1478 return ERR_PTR(ret);
1479
1480}
1481
1482static struct nfs4_state *
1483_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1484{
1485 struct inode *inode;
1486 struct nfs4_state *state = NULL;
1487 int ret;
1488
1489 if (!data->rpc_done) {
1490 state = nfs4_try_open_cached(data);
1491 goto out;
1492 }
1493
1494 ret = -EAGAIN;
1495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1496 goto err;
1497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1498 ret = PTR_ERR(inode);
1499 if (IS_ERR(inode))
1500 goto err;
1501 ret = -ENOMEM;
1502 state = nfs4_get_open_state(inode, data->owner);
1503 if (state == NULL)
1504 goto err_put_inode;
1505 if (data->o_res.delegation_type != 0)
1506 nfs4_opendata_check_deleg(data, state);
1507 update_open_stateid(state, &data->o_res.stateid, NULL,
1508 data->o_arg.fmode);
1509 iput(inode);
1510out:
1511 nfs_release_seqid(data->o_arg.seqid);
1512 return state;
1513err_put_inode:
1514 iput(inode);
1515err:
1516 return ERR_PTR(ret);
1517}
1518
1519static struct nfs4_state *
1520nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1521{
1522 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1523 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1524 return _nfs4_opendata_to_nfs4_state(data);
1525}
1526
1527static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1528{
1529 struct nfs_inode *nfsi = NFS_I(state->inode);
1530 struct nfs_open_context *ctx;
1531
1532 spin_lock(&state->inode->i_lock);
1533 list_for_each_entry(ctx, &nfsi->open_files, list) {
1534 if (ctx->state != state)
1535 continue;
1536 get_nfs_open_context(ctx);
1537 spin_unlock(&state->inode->i_lock);
1538 return ctx;
1539 }
1540 spin_unlock(&state->inode->i_lock);
1541 return ERR_PTR(-ENOENT);
1542}
1543
1544static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1545 struct nfs4_state *state, enum open_claim_type4 claim)
1546{
1547 struct nfs4_opendata *opendata;
1548
1549 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1550 NULL, NULL, claim, GFP_NOFS);
1551 if (opendata == NULL)
1552 return ERR_PTR(-ENOMEM);
1553 opendata->state = state;
1554 atomic_inc(&state->count);
1555 return opendata;
1556}
1557
1558static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1559{
1560 struct nfs4_state *newstate;
1561 int ret;
1562
1563 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1564 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1565 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1566 /* This mode can't have been delegated, so we must have
1567 * a valid open_stateid to cover it - not need to reclaim.
1568 */
1569 return 0;
1570 opendata->o_arg.open_flags = 0;
1571 opendata->o_arg.fmode = fmode;
1572 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1573 NFS_SB(opendata->dentry->d_sb),
1574 fmode, 0);
1575 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1576 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1577 nfs4_init_opendata_res(opendata);
1578 ret = _nfs4_recover_proc_open(opendata);
1579 if (ret != 0)
1580 return ret;
1581 newstate = nfs4_opendata_to_nfs4_state(opendata);
1582 if (IS_ERR(newstate))
1583 return PTR_ERR(newstate);
1584 nfs4_close_state(newstate, fmode);
1585 *res = newstate;
1586 return 0;
1587}
1588
1589static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1590{
1591 struct nfs4_state *newstate;
1592 int ret;
1593
1594 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1595 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1596 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1597 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1598 /* memory barrier prior to reading state->n_* */
1599 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1600 clear_bit(NFS_OPEN_STATE, &state->flags);
1601 smp_rmb();
1602 if (state->n_rdwr != 0) {
1603 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1604 if (ret != 0)
1605 return ret;
1606 if (newstate != state)
1607 return -ESTALE;
1608 }
1609 if (state->n_wronly != 0) {
1610 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1611 if (ret != 0)
1612 return ret;
1613 if (newstate != state)
1614 return -ESTALE;
1615 }
1616 if (state->n_rdonly != 0) {
1617 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1618 if (ret != 0)
1619 return ret;
1620 if (newstate != state)
1621 return -ESTALE;
1622 }
1623 /*
1624 * We may have performed cached opens for all three recoveries.
1625 * Check if we need to update the current stateid.
1626 */
1627 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1628 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1629 write_seqlock(&state->seqlock);
1630 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1631 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1632 write_sequnlock(&state->seqlock);
1633 }
1634 return 0;
1635}
1636
1637/*
1638 * OPEN_RECLAIM:
1639 * reclaim state on the server after a reboot.
1640 */
1641static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1642{
1643 struct nfs_delegation *delegation;
1644 struct nfs4_opendata *opendata;
1645 fmode_t delegation_type = 0;
1646 int status;
1647
1648 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1649 NFS4_OPEN_CLAIM_PREVIOUS);
1650 if (IS_ERR(opendata))
1651 return PTR_ERR(opendata);
1652 rcu_read_lock();
1653 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1654 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1655 delegation_type = delegation->type;
1656 rcu_read_unlock();
1657 opendata->o_arg.u.delegation_type = delegation_type;
1658 status = nfs4_open_recover(opendata, state);
1659 nfs4_opendata_put(opendata);
1660 return status;
1661}
1662
1663static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1664{
1665 struct nfs_server *server = NFS_SERVER(state->inode);
1666 struct nfs4_exception exception = { };
1667 int err;
1668 do {
1669 err = _nfs4_do_open_reclaim(ctx, state);
1670 trace_nfs4_open_reclaim(ctx, 0, err);
1671 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1672 continue;
1673 if (err != -NFS4ERR_DELAY)
1674 break;
1675 nfs4_handle_exception(server, err, &exception);
1676 } while (exception.retry);
1677 return err;
1678}
1679
1680static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1681{
1682 struct nfs_open_context *ctx;
1683 int ret;
1684
1685 ctx = nfs4_state_find_open_context(state);
1686 if (IS_ERR(ctx))
1687 return -EAGAIN;
1688 ret = nfs4_do_open_reclaim(ctx, state);
1689 put_nfs_open_context(ctx);
1690 return ret;
1691}
1692
1693static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1694{
1695 switch (err) {
1696 default:
1697 printk(KERN_ERR "NFS: %s: unhandled error "
1698 "%d.\n", __func__, err);
1699 case 0:
1700 case -ENOENT:
1701 case -EAGAIN:
1702 case -ESTALE:
1703 break;
1704 case -NFS4ERR_BADSESSION:
1705 case -NFS4ERR_BADSLOT:
1706 case -NFS4ERR_BAD_HIGH_SLOT:
1707 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1708 case -NFS4ERR_DEADSESSION:
1709 set_bit(NFS_DELEGATED_STATE, &state->flags);
1710 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1711 return -EAGAIN;
1712 case -NFS4ERR_STALE_CLIENTID:
1713 case -NFS4ERR_STALE_STATEID:
1714 set_bit(NFS_DELEGATED_STATE, &state->flags);
1715 case -NFS4ERR_EXPIRED:
1716 /* Don't recall a delegation if it was lost */
1717 nfs4_schedule_lease_recovery(server->nfs_client);
1718 return -EAGAIN;
1719 case -NFS4ERR_MOVED:
1720 nfs4_schedule_migration_recovery(server);
1721 return -EAGAIN;
1722 case -NFS4ERR_LEASE_MOVED:
1723 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1724 return -EAGAIN;
1725 case -NFS4ERR_DELEG_REVOKED:
1726 case -NFS4ERR_ADMIN_REVOKED:
1727 case -NFS4ERR_BAD_STATEID:
1728 case -NFS4ERR_OPENMODE:
1729 nfs_inode_find_state_and_recover(state->inode,
1730 stateid);
1731 nfs4_schedule_stateid_recovery(server, state);
1732 return -EAGAIN;
1733 case -NFS4ERR_DELAY:
1734 case -NFS4ERR_GRACE:
1735 set_bit(NFS_DELEGATED_STATE, &state->flags);
1736 ssleep(1);
1737 return -EAGAIN;
1738 case -ENOMEM:
1739 case -NFS4ERR_DENIED:
1740 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1741 return 0;
1742 }
1743 return err;
1744}
1745
1746int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1747{
1748 struct nfs_server *server = NFS_SERVER(state->inode);
1749 struct nfs4_opendata *opendata;
1750 int err;
1751
1752 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1753 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1754 if (IS_ERR(opendata))
1755 return PTR_ERR(opendata);
1756 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1757 err = nfs4_open_recover(opendata, state);
1758 nfs4_opendata_put(opendata);
1759 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1760}
1761
1762static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1763{
1764 struct nfs4_opendata *data = calldata;
1765
1766 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1767 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1768}
1769
1770static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1773
1774 nfs40_sequence_done(task, &data->c_res.seq_res);
1775
1776 data->rpc_status = task->tk_status;
1777 if (data->rpc_status == 0) {
1778 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1779 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1780 renew_lease(data->o_res.server, data->timestamp);
1781 data->rpc_done = 1;
1782 }
1783}
1784
1785static void nfs4_open_confirm_release(void *calldata)
1786{
1787 struct nfs4_opendata *data = calldata;
1788 struct nfs4_state *state = NULL;
1789
1790 /* If this request hasn't been cancelled, do nothing */
1791 if (data->cancelled == 0)
1792 goto out_free;
1793 /* In case of error, no cleanup! */
1794 if (!data->rpc_done)
1795 goto out_free;
1796 state = nfs4_opendata_to_nfs4_state(data);
1797 if (!IS_ERR(state))
1798 nfs4_close_state(state, data->o_arg.fmode);
1799out_free:
1800 nfs4_opendata_put(data);
1801}
1802
1803static const struct rpc_call_ops nfs4_open_confirm_ops = {
1804 .rpc_call_prepare = nfs4_open_confirm_prepare,
1805 .rpc_call_done = nfs4_open_confirm_done,
1806 .rpc_release = nfs4_open_confirm_release,
1807};
1808
1809/*
1810 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1811 */
1812static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1813{
1814 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1815 struct rpc_task *task;
1816 struct rpc_message msg = {
1817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1818 .rpc_argp = &data->c_arg,
1819 .rpc_resp = &data->c_res,
1820 .rpc_cred = data->owner->so_cred,
1821 };
1822 struct rpc_task_setup task_setup_data = {
1823 .rpc_client = server->client,
1824 .rpc_message = &msg,
1825 .callback_ops = &nfs4_open_confirm_ops,
1826 .callback_data = data,
1827 .workqueue = nfsiod_workqueue,
1828 .flags = RPC_TASK_ASYNC,
1829 };
1830 int status;
1831
1832 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1833 kref_get(&data->kref);
1834 data->rpc_done = 0;
1835 data->rpc_status = 0;
1836 data->timestamp = jiffies;
1837 task = rpc_run_task(&task_setup_data);
1838 if (IS_ERR(task))
1839 return PTR_ERR(task);
1840 status = nfs4_wait_for_completion_rpc_task(task);
1841 if (status != 0) {
1842 data->cancelled = 1;
1843 smp_wmb();
1844 } else
1845 status = data->rpc_status;
1846 rpc_put_task(task);
1847 return status;
1848}
1849
1850static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1851{
1852 struct nfs4_opendata *data = calldata;
1853 struct nfs4_state_owner *sp = data->owner;
1854 struct nfs_client *clp = sp->so_server->nfs_client;
1855
1856 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1857 goto out_wait;
1858 /*
1859 * Check if we still need to send an OPEN call, or if we can use
1860 * a delegation instead.
1861 */
1862 if (data->state != NULL) {
1863 struct nfs_delegation *delegation;
1864
1865 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1866 goto out_no_action;
1867 rcu_read_lock();
1868 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1869 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1870 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1871 can_open_delegated(delegation, data->o_arg.fmode))
1872 goto unlock_no_action;
1873 rcu_read_unlock();
1874 }
1875 /* Update client id. */
1876 data->o_arg.clientid = clp->cl_clientid;
1877 switch (data->o_arg.claim) {
1878 case NFS4_OPEN_CLAIM_PREVIOUS:
1879 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1880 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1881 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1882 case NFS4_OPEN_CLAIM_FH:
1883 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1884 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1885 }
1886 data->timestamp = jiffies;
1887 if (nfs4_setup_sequence(data->o_arg.server,
1888 &data->o_arg.seq_args,
1889 &data->o_res.seq_res,
1890 task) != 0)
1891 nfs_release_seqid(data->o_arg.seqid);
1892
1893 /* Set the create mode (note dependency on the session type) */
1894 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1895 if (data->o_arg.open_flags & O_EXCL) {
1896 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1897 if (nfs4_has_persistent_session(clp))
1898 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1899 else if (clp->cl_mvops->minor_version > 0)
1900 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1901 }
1902 return;
1903unlock_no_action:
1904 rcu_read_unlock();
1905out_no_action:
1906 task->tk_action = NULL;
1907out_wait:
1908 nfs4_sequence_done(task, &data->o_res.seq_res);
1909}
1910
1911static void nfs4_open_done(struct rpc_task *task, void *calldata)
1912{
1913 struct nfs4_opendata *data = calldata;
1914
1915 data->rpc_status = task->tk_status;
1916
1917 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1918 return;
1919
1920 if (task->tk_status == 0) {
1921 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1922 switch (data->o_res.f_attr->mode & S_IFMT) {
1923 case S_IFREG:
1924 break;
1925 case S_IFLNK:
1926 data->rpc_status = -ELOOP;
1927 break;
1928 case S_IFDIR:
1929 data->rpc_status = -EISDIR;
1930 break;
1931 default:
1932 data->rpc_status = -ENOTDIR;
1933 }
1934 }
1935 renew_lease(data->o_res.server, data->timestamp);
1936 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1937 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1938 }
1939 data->rpc_done = 1;
1940}
1941
1942static void nfs4_open_release(void *calldata)
1943{
1944 struct nfs4_opendata *data = calldata;
1945 struct nfs4_state *state = NULL;
1946
1947 /* If this request hasn't been cancelled, do nothing */
1948 if (data->cancelled == 0)
1949 goto out_free;
1950 /* In case of error, no cleanup! */
1951 if (data->rpc_status != 0 || !data->rpc_done)
1952 goto out_free;
1953 /* In case we need an open_confirm, no cleanup! */
1954 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1955 goto out_free;
1956 state = nfs4_opendata_to_nfs4_state(data);
1957 if (!IS_ERR(state))
1958 nfs4_close_state(state, data->o_arg.fmode);
1959out_free:
1960 nfs4_opendata_put(data);
1961}
1962
1963static const struct rpc_call_ops nfs4_open_ops = {
1964 .rpc_call_prepare = nfs4_open_prepare,
1965 .rpc_call_done = nfs4_open_done,
1966 .rpc_release = nfs4_open_release,
1967};
1968
1969static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1970{
1971 struct inode *dir = d_inode(data->dir);
1972 struct nfs_server *server = NFS_SERVER(dir);
1973 struct nfs_openargs *o_arg = &data->o_arg;
1974 struct nfs_openres *o_res = &data->o_res;
1975 struct rpc_task *task;
1976 struct rpc_message msg = {
1977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1978 .rpc_argp = o_arg,
1979 .rpc_resp = o_res,
1980 .rpc_cred = data->owner->so_cred,
1981 };
1982 struct rpc_task_setup task_setup_data = {
1983 .rpc_client = server->client,
1984 .rpc_message = &msg,
1985 .callback_ops = &nfs4_open_ops,
1986 .callback_data = data,
1987 .workqueue = nfsiod_workqueue,
1988 .flags = RPC_TASK_ASYNC,
1989 };
1990 int status;
1991
1992 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1993 kref_get(&data->kref);
1994 data->rpc_done = 0;
1995 data->rpc_status = 0;
1996 data->cancelled = 0;
1997 data->is_recover = 0;
1998 if (isrecover) {
1999 nfs4_set_sequence_privileged(&o_arg->seq_args);
2000 data->is_recover = 1;
2001 }
2002 task = rpc_run_task(&task_setup_data);
2003 if (IS_ERR(task))
2004 return PTR_ERR(task);
2005 status = nfs4_wait_for_completion_rpc_task(task);
2006 if (status != 0) {
2007 data->cancelled = 1;
2008 smp_wmb();
2009 } else
2010 status = data->rpc_status;
2011 rpc_put_task(task);
2012
2013 return status;
2014}
2015
2016static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2017{
2018 struct inode *dir = d_inode(data->dir);
2019 struct nfs_openres *o_res = &data->o_res;
2020 int status;
2021
2022 status = nfs4_run_open_task(data, 1);
2023 if (status != 0 || !data->rpc_done)
2024 return status;
2025
2026 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2027
2028 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2029 status = _nfs4_proc_open_confirm(data);
2030 if (status != 0)
2031 return status;
2032 }
2033
2034 return status;
2035}
2036
2037/*
2038 * Additional permission checks in order to distinguish between an
2039 * open for read, and an open for execute. This works around the
2040 * fact that NFSv4 OPEN treats read and execute permissions as being
2041 * the same.
2042 * Note that in the non-execute case, we want to turn off permission
2043 * checking if we just created a new file (POSIX open() semantics).
2044 */
2045static int nfs4_opendata_access(struct rpc_cred *cred,
2046 struct nfs4_opendata *opendata,
2047 struct nfs4_state *state, fmode_t fmode,
2048 int openflags)
2049{
2050 struct nfs_access_entry cache;
2051 u32 mask;
2052
2053 /* access call failed or for some reason the server doesn't
2054 * support any access modes -- defer access call until later */
2055 if (opendata->o_res.access_supported == 0)
2056 return 0;
2057
2058 mask = 0;
2059 /*
2060 * Use openflags to check for exec, because fmode won't
2061 * always have FMODE_EXEC set when file open for exec.
2062 */
2063 if (openflags & __FMODE_EXEC) {
2064 /* ONLY check for exec rights */
2065 mask = MAY_EXEC;
2066 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2067 mask = MAY_READ;
2068
2069 cache.cred = cred;
2070 cache.jiffies = jiffies;
2071 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2072 nfs_access_add_cache(state->inode, &cache);
2073
2074 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2075 return 0;
2076
2077 /* even though OPEN succeeded, access is denied. Close the file */
2078 nfs4_close_state(state, fmode);
2079 return -EACCES;
2080}
2081
2082/*
2083 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2084 */
2085static int _nfs4_proc_open(struct nfs4_opendata *data)
2086{
2087 struct inode *dir = d_inode(data->dir);
2088 struct nfs_server *server = NFS_SERVER(dir);
2089 struct nfs_openargs *o_arg = &data->o_arg;
2090 struct nfs_openres *o_res = &data->o_res;
2091 int status;
2092
2093 status = nfs4_run_open_task(data, 0);
2094 if (!data->rpc_done)
2095 return status;
2096 if (status != 0) {
2097 if (status == -NFS4ERR_BADNAME &&
2098 !(o_arg->open_flags & O_CREAT))
2099 return -ENOENT;
2100 return status;
2101 }
2102
2103 nfs_fattr_map_and_free_names(server, &data->f_attr);
2104
2105 if (o_arg->open_flags & O_CREAT) {
2106 update_changeattr(dir, &o_res->cinfo);
2107 if (o_arg->open_flags & O_EXCL)
2108 data->file_created = 1;
2109 else if (o_res->cinfo.before != o_res->cinfo.after)
2110 data->file_created = 1;
2111 }
2112 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2113 server->caps &= ~NFS_CAP_POSIX_LOCK;
2114 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2115 status = _nfs4_proc_open_confirm(data);
2116 if (status != 0)
2117 return status;
2118 }
2119 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2120 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2121 return 0;
2122}
2123
2124static int nfs4_recover_expired_lease(struct nfs_server *server)
2125{
2126 return nfs4_client_recover_expired_lease(server->nfs_client);
2127}
2128
2129/*
2130 * OPEN_EXPIRED:
2131 * reclaim state on the server after a network partition.
2132 * Assumes caller holds the appropriate lock
2133 */
2134static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2135{
2136 struct nfs4_opendata *opendata;
2137 int ret;
2138
2139 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2140 NFS4_OPEN_CLAIM_FH);
2141 if (IS_ERR(opendata))
2142 return PTR_ERR(opendata);
2143 ret = nfs4_open_recover(opendata, state);
2144 if (ret == -ESTALE)
2145 d_drop(ctx->dentry);
2146 nfs4_opendata_put(opendata);
2147 return ret;
2148}
2149
2150static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2151{
2152 struct nfs_server *server = NFS_SERVER(state->inode);
2153 struct nfs4_exception exception = { };
2154 int err;
2155
2156 do {
2157 err = _nfs4_open_expired(ctx, state);
2158 trace_nfs4_open_expired(ctx, 0, err);
2159 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2160 continue;
2161 switch (err) {
2162 default:
2163 goto out;
2164 case -NFS4ERR_GRACE:
2165 case -NFS4ERR_DELAY:
2166 nfs4_handle_exception(server, err, &exception);
2167 err = 0;
2168 }
2169 } while (exception.retry);
2170out:
2171 return err;
2172}
2173
2174static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2175{
2176 struct nfs_open_context *ctx;
2177 int ret;
2178
2179 ctx = nfs4_state_find_open_context(state);
2180 if (IS_ERR(ctx))
2181 return -EAGAIN;
2182 ret = nfs4_do_open_expired(ctx, state);
2183 put_nfs_open_context(ctx);
2184 return ret;
2185}
2186
2187static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2188{
2189 nfs_remove_bad_delegation(state->inode);
2190 write_seqlock(&state->seqlock);
2191 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2192 write_sequnlock(&state->seqlock);
2193 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2194}
2195
2196static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2197{
2198 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2199 nfs_finish_clear_delegation_stateid(state);
2200}
2201
2202static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2203{
2204 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2205 nfs40_clear_delegation_stateid(state);
2206 return nfs4_open_expired(sp, state);
2207}
2208
2209#if defined(CONFIG_NFS_V4_1)
2210static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2211{
2212 struct nfs_server *server = NFS_SERVER(state->inode);
2213 nfs4_stateid stateid;
2214 struct nfs_delegation *delegation;
2215 struct rpc_cred *cred;
2216 int status;
2217
2218 /* Get the delegation credential for use by test/free_stateid */
2219 rcu_read_lock();
2220 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2221 if (delegation == NULL) {
2222 rcu_read_unlock();
2223 return;
2224 }
2225
2226 nfs4_stateid_copy(&stateid, &delegation->stateid);
2227 cred = get_rpccred(delegation->cred);
2228 rcu_read_unlock();
2229 status = nfs41_test_stateid(server, &stateid, cred);
2230 trace_nfs4_test_delegation_stateid(state, NULL, status);
2231
2232 if (status != NFS_OK) {
2233 /* Free the stateid unless the server explicitly
2234 * informs us the stateid is unrecognized. */
2235 if (status != -NFS4ERR_BAD_STATEID)
2236 nfs41_free_stateid(server, &stateid, cred);
2237 nfs_finish_clear_delegation_stateid(state);
2238 }
2239
2240 put_rpccred(cred);
2241}
2242
2243/**
2244 * nfs41_check_open_stateid - possibly free an open stateid
2245 *
2246 * @state: NFSv4 state for an inode
2247 *
2248 * Returns NFS_OK if recovery for this stateid is now finished.
2249 * Otherwise a negative NFS4ERR value is returned.
2250 */
2251static int nfs41_check_open_stateid(struct nfs4_state *state)
2252{
2253 struct nfs_server *server = NFS_SERVER(state->inode);
2254 nfs4_stateid *stateid = &state->open_stateid;
2255 struct rpc_cred *cred = state->owner->so_cred;
2256 int status;
2257
2258 /* If a state reset has been done, test_stateid is unneeded */
2259 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2260 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2261 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2262 return -NFS4ERR_BAD_STATEID;
2263
2264 status = nfs41_test_stateid(server, stateid, cred);
2265 trace_nfs4_test_open_stateid(state, NULL, status);
2266 if (status != NFS_OK) {
2267 /* Free the stateid unless the server explicitly
2268 * informs us the stateid is unrecognized. */
2269 if (status != -NFS4ERR_BAD_STATEID)
2270 nfs41_free_stateid(server, stateid, cred);
2271
2272 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2273 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2274 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2275 clear_bit(NFS_OPEN_STATE, &state->flags);
2276 }
2277 return status;
2278}
2279
2280static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2281{
2282 int status;
2283
2284 nfs41_check_delegation_stateid(state);
2285 status = nfs41_check_open_stateid(state);
2286 if (status != NFS_OK)
2287 status = nfs4_open_expired(sp, state);
2288 return status;
2289}
2290#endif
2291
2292/*
2293 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2294 * fields corresponding to attributes that were used to store the verifier.
2295 * Make sure we clobber those fields in the later setattr call
2296 */
2297static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2298{
2299 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2300 !(sattr->ia_valid & ATTR_ATIME_SET))
2301 sattr->ia_valid |= ATTR_ATIME;
2302
2303 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2304 !(sattr->ia_valid & ATTR_MTIME_SET))
2305 sattr->ia_valid |= ATTR_MTIME;
2306}
2307
2308static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2309 fmode_t fmode,
2310 int flags,
2311 struct nfs_open_context *ctx)
2312{
2313 struct nfs4_state_owner *sp = opendata->owner;
2314 struct nfs_server *server = sp->so_server;
2315 struct dentry *dentry;
2316 struct nfs4_state *state;
2317 unsigned int seq;
2318 int ret;
2319
2320 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2321
2322 ret = _nfs4_proc_open(opendata);
2323 if (ret != 0)
2324 goto out;
2325
2326 state = nfs4_opendata_to_nfs4_state(opendata);
2327 ret = PTR_ERR(state);
2328 if (IS_ERR(state))
2329 goto out;
2330 if (server->caps & NFS_CAP_POSIX_LOCK)
2331 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2332
2333 dentry = opendata->dentry;
2334 if (d_really_is_negative(dentry)) {
2335 /* FIXME: Is this d_drop() ever needed? */
2336 d_drop(dentry);
2337 dentry = d_add_unique(dentry, igrab(state->inode));
2338 if (dentry == NULL) {
2339 dentry = opendata->dentry;
2340 } else if (dentry != ctx->dentry) {
2341 dput(ctx->dentry);
2342 ctx->dentry = dget(dentry);
2343 }
2344 nfs_set_verifier(dentry,
2345 nfs_save_change_attribute(d_inode(opendata->dir)));
2346 }
2347
2348 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2349 if (ret != 0)
2350 goto out;
2351
2352 ctx->state = state;
2353 if (d_inode(dentry) == state->inode) {
2354 nfs_inode_attach_open_context(ctx);
2355 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2356 nfs4_schedule_stateid_recovery(server, state);
2357 }
2358out:
2359 return ret;
2360}
2361
2362/*
2363 * Returns a referenced nfs4_state
2364 */
2365static int _nfs4_do_open(struct inode *dir,
2366 struct nfs_open_context *ctx,
2367 int flags,
2368 struct iattr *sattr,
2369 struct nfs4_label *label,
2370 int *opened)
2371{
2372 struct nfs4_state_owner *sp;
2373 struct nfs4_state *state = NULL;
2374 struct nfs_server *server = NFS_SERVER(dir);
2375 struct nfs4_opendata *opendata;
2376 struct dentry *dentry = ctx->dentry;
2377 struct rpc_cred *cred = ctx->cred;
2378 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2379 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2380 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2381 struct nfs4_label *olabel = NULL;
2382 int status;
2383
2384 /* Protect against reboot recovery conflicts */
2385 status = -ENOMEM;
2386 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2387 if (sp == NULL) {
2388 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2389 goto out_err;
2390 }
2391 status = nfs4_recover_expired_lease(server);
2392 if (status != 0)
2393 goto err_put_state_owner;
2394 if (d_really_is_positive(dentry))
2395 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2396 status = -ENOMEM;
2397 if (d_really_is_positive(dentry))
2398 claim = NFS4_OPEN_CLAIM_FH;
2399 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2400 label, claim, GFP_KERNEL);
2401 if (opendata == NULL)
2402 goto err_put_state_owner;
2403
2404 if (label) {
2405 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2406 if (IS_ERR(olabel)) {
2407 status = PTR_ERR(olabel);
2408 goto err_opendata_put;
2409 }
2410 }
2411
2412 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2413 if (!opendata->f_attr.mdsthreshold) {
2414 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2415 if (!opendata->f_attr.mdsthreshold)
2416 goto err_free_label;
2417 }
2418 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2419 }
2420 if (d_really_is_positive(dentry))
2421 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2422
2423 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2424 if (status != 0)
2425 goto err_free_label;
2426 state = ctx->state;
2427
2428 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2429 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2430 nfs4_exclusive_attrset(opendata, sattr);
2431
2432 nfs_fattr_init(opendata->o_res.f_attr);
2433 status = nfs4_do_setattr(state->inode, cred,
2434 opendata->o_res.f_attr, sattr,
2435 state, label, olabel);
2436 if (status == 0) {
2437 nfs_setattr_update_inode(state->inode, sattr,
2438 opendata->o_res.f_attr);
2439 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2440 }
2441 }
2442 if (opendata->file_created)
2443 *opened |= FILE_CREATED;
2444
2445 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2446 *ctx_th = opendata->f_attr.mdsthreshold;
2447 opendata->f_attr.mdsthreshold = NULL;
2448 }
2449
2450 nfs4_label_free(olabel);
2451
2452 nfs4_opendata_put(opendata);
2453 nfs4_put_state_owner(sp);
2454 return 0;
2455err_free_label:
2456 nfs4_label_free(olabel);
2457err_opendata_put:
2458 nfs4_opendata_put(opendata);
2459err_put_state_owner:
2460 nfs4_put_state_owner(sp);
2461out_err:
2462 return status;
2463}
2464
2465
2466static struct nfs4_state *nfs4_do_open(struct inode *dir,
2467 struct nfs_open_context *ctx,
2468 int flags,
2469 struct iattr *sattr,
2470 struct nfs4_label *label,
2471 int *opened)
2472{
2473 struct nfs_server *server = NFS_SERVER(dir);
2474 struct nfs4_exception exception = { };
2475 struct nfs4_state *res;
2476 int status;
2477
2478 do {
2479 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2480 res = ctx->state;
2481 trace_nfs4_open_file(ctx, flags, status);
2482 if (status == 0)
2483 break;
2484 /* NOTE: BAD_SEQID means the server and client disagree about the
2485 * book-keeping w.r.t. state-changing operations
2486 * (OPEN/CLOSE/LOCK/LOCKU...)
2487 * It is actually a sign of a bug on the client or on the server.
2488 *
2489 * If we receive a BAD_SEQID error in the particular case of
2490 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2491 * have unhashed the old state_owner for us, and that we can
2492 * therefore safely retry using a new one. We should still warn
2493 * the user though...
2494 */
2495 if (status == -NFS4ERR_BAD_SEQID) {
2496 pr_warn_ratelimited("NFS: v4 server %s "
2497 " returned a bad sequence-id error!\n",
2498 NFS_SERVER(dir)->nfs_client->cl_hostname);
2499 exception.retry = 1;
2500 continue;
2501 }
2502 /*
2503 * BAD_STATEID on OPEN means that the server cancelled our
2504 * state before it received the OPEN_CONFIRM.
2505 * Recover by retrying the request as per the discussion
2506 * on Page 181 of RFC3530.
2507 */
2508 if (status == -NFS4ERR_BAD_STATEID) {
2509 exception.retry = 1;
2510 continue;
2511 }
2512 if (status == -EAGAIN) {
2513 /* We must have found a delegation */
2514 exception.retry = 1;
2515 continue;
2516 }
2517 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2518 continue;
2519 res = ERR_PTR(nfs4_handle_exception(server,
2520 status, &exception));
2521 } while (exception.retry);
2522 return res;
2523}
2524
2525static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2526 struct nfs_fattr *fattr, struct iattr *sattr,
2527 struct nfs4_state *state, struct nfs4_label *ilabel,
2528 struct nfs4_label *olabel)
2529{
2530 struct nfs_server *server = NFS_SERVER(inode);
2531 struct nfs_setattrargs arg = {
2532 .fh = NFS_FH(inode),
2533 .iap = sattr,
2534 .server = server,
2535 .bitmask = server->attr_bitmask,
2536 .label = ilabel,
2537 };
2538 struct nfs_setattrres res = {
2539 .fattr = fattr,
2540 .label = olabel,
2541 .server = server,
2542 };
2543 struct rpc_message msg = {
2544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2545 .rpc_argp = &arg,
2546 .rpc_resp = &res,
2547 .rpc_cred = cred,
2548 };
2549 unsigned long timestamp = jiffies;
2550 fmode_t fmode;
2551 bool truncate;
2552 int status;
2553
2554 arg.bitmask = nfs4_bitmask(server, ilabel);
2555 if (ilabel)
2556 arg.bitmask = nfs4_bitmask(server, olabel);
2557
2558 nfs_fattr_init(fattr);
2559
2560 /* Servers should only apply open mode checks for file size changes */
2561 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2562 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2563
2564 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2565 /* Use that stateid */
2566 } else if (truncate && state != NULL) {
2567 struct nfs_lockowner lockowner = {
2568 .l_owner = current->files,
2569 .l_pid = current->tgid,
2570 };
2571 if (!nfs4_valid_open_stateid(state))
2572 return -EBADF;
2573 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2574 &lockowner) == -EIO)
2575 return -EBADF;
2576 } else
2577 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2578
2579 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2580 if (status == 0 && state != NULL)
2581 renew_lease(server, timestamp);
2582 return status;
2583}
2584
2585static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2586 struct nfs_fattr *fattr, struct iattr *sattr,
2587 struct nfs4_state *state, struct nfs4_label *ilabel,
2588 struct nfs4_label *olabel)
2589{
2590 struct nfs_server *server = NFS_SERVER(inode);
2591 struct nfs4_exception exception = {
2592 .state = state,
2593 .inode = inode,
2594 };
2595 int err;
2596 do {
2597 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2598 trace_nfs4_setattr(inode, err);
2599 switch (err) {
2600 case -NFS4ERR_OPENMODE:
2601 if (!(sattr->ia_valid & ATTR_SIZE)) {
2602 pr_warn_once("NFSv4: server %s is incorrectly "
2603 "applying open mode checks to "
2604 "a SETATTR that is not "
2605 "changing file size.\n",
2606 server->nfs_client->cl_hostname);
2607 }
2608 if (state && !(state->state & FMODE_WRITE)) {
2609 err = -EBADF;
2610 if (sattr->ia_valid & ATTR_OPEN)
2611 err = -EACCES;
2612 goto out;
2613 }
2614 }
2615 err = nfs4_handle_exception(server, err, &exception);
2616 } while (exception.retry);
2617out:
2618 return err;
2619}
2620
2621struct nfs4_closedata {
2622 struct inode *inode;
2623 struct nfs4_state *state;
2624 struct nfs_closeargs arg;
2625 struct nfs_closeres res;
2626 struct nfs_fattr fattr;
2627 unsigned long timestamp;
2628 bool roc;
2629 u32 roc_barrier;
2630};
2631
2632static void nfs4_free_closedata(void *data)
2633{
2634 struct nfs4_closedata *calldata = data;
2635 struct nfs4_state_owner *sp = calldata->state->owner;
2636 struct super_block *sb = calldata->state->inode->i_sb;
2637
2638 if (calldata->roc)
2639 pnfs_roc_release(calldata->state->inode);
2640 nfs4_put_open_state(calldata->state);
2641 nfs_free_seqid(calldata->arg.seqid);
2642 nfs4_put_state_owner(sp);
2643 nfs_sb_deactive(sb);
2644 kfree(calldata);
2645}
2646
2647static void nfs4_close_done(struct rpc_task *task, void *data)
2648{
2649 struct nfs4_closedata *calldata = data;
2650 struct nfs4_state *state = calldata->state;
2651 struct nfs_server *server = NFS_SERVER(calldata->inode);
2652 nfs4_stateid *res_stateid = NULL;
2653
2654 dprintk("%s: begin!\n", __func__);
2655 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2656 return;
2657 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2658 /* hmm. we are done with the inode, and in the process of freeing
2659 * the state_owner. we keep this around to process errors
2660 */
2661 switch (task->tk_status) {
2662 case 0:
2663 res_stateid = &calldata->res.stateid;
2664 if (calldata->arg.fmode == 0 && calldata->roc)
2665 pnfs_roc_set_barrier(state->inode,
2666 calldata->roc_barrier);
2667 renew_lease(server, calldata->timestamp);
2668 break;
2669 case -NFS4ERR_ADMIN_REVOKED:
2670 case -NFS4ERR_STALE_STATEID:
2671 case -NFS4ERR_OLD_STATEID:
2672 case -NFS4ERR_BAD_STATEID:
2673 case -NFS4ERR_EXPIRED:
2674 if (!nfs4_stateid_match(&calldata->arg.stateid,
2675 &state->open_stateid)) {
2676 rpc_restart_call_prepare(task);
2677 goto out_release;
2678 }
2679 if (calldata->arg.fmode == 0)
2680 break;
2681 default:
2682 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2683 rpc_restart_call_prepare(task);
2684 goto out_release;
2685 }
2686 }
2687 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2688out_release:
2689 nfs_release_seqid(calldata->arg.seqid);
2690 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2691 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2692}
2693
2694static void nfs4_close_prepare(struct rpc_task *task, void *data)
2695{
2696 struct nfs4_closedata *calldata = data;
2697 struct nfs4_state *state = calldata->state;
2698 struct inode *inode = calldata->inode;
2699 bool is_rdonly, is_wronly, is_rdwr;
2700 int call_close = 0;
2701
2702 dprintk("%s: begin!\n", __func__);
2703 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2704 goto out_wait;
2705
2706 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2707 spin_lock(&state->owner->so_lock);
2708 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2709 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2710 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2711 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
2712 /* Calculate the change in open mode */
2713 calldata->arg.fmode = 0;
2714 if (state->n_rdwr == 0) {
2715 if (state->n_rdonly == 0)
2716 call_close |= is_rdonly;
2717 else if (is_rdonly)
2718 calldata->arg.fmode |= FMODE_READ;
2719 if (state->n_wronly == 0)
2720 call_close |= is_wronly;
2721 else if (is_wronly)
2722 calldata->arg.fmode |= FMODE_WRITE;
2723 } else if (is_rdwr)
2724 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2725
2726 if (calldata->arg.fmode == 0)
2727 call_close |= is_rdwr;
2728
2729 if (!nfs4_valid_open_stateid(state))
2730 call_close = 0;
2731 spin_unlock(&state->owner->so_lock);
2732
2733 if (!call_close) {
2734 /* Note: exit _without_ calling nfs4_close_done */
2735 goto out_no_action;
2736 }
2737
2738 if (calldata->arg.fmode == 0) {
2739 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2740 if (calldata->roc)
2741 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2742 }
2743 calldata->arg.share_access =
2744 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2745 calldata->arg.fmode, 0);
2746
2747 nfs_fattr_init(calldata->res.fattr);
2748 calldata->timestamp = jiffies;
2749 if (nfs4_setup_sequence(NFS_SERVER(inode),
2750 &calldata->arg.seq_args,
2751 &calldata->res.seq_res,
2752 task) != 0)
2753 nfs_release_seqid(calldata->arg.seqid);
2754 dprintk("%s: done!\n", __func__);
2755 return;
2756out_no_action:
2757 task->tk_action = NULL;
2758out_wait:
2759 nfs4_sequence_done(task, &calldata->res.seq_res);
2760}
2761
2762static const struct rpc_call_ops nfs4_close_ops = {
2763 .rpc_call_prepare = nfs4_close_prepare,
2764 .rpc_call_done = nfs4_close_done,
2765 .rpc_release = nfs4_free_closedata,
2766};
2767
2768static bool nfs4_roc(struct inode *inode)
2769{
2770 if (!nfs_have_layout(inode))
2771 return false;
2772 return pnfs_roc(inode);
2773}
2774
2775/*
2776 * It is possible for data to be read/written from a mem-mapped file
2777 * after the sys_close call (which hits the vfs layer as a flush).
2778 * This means that we can't safely call nfsv4 close on a file until
2779 * the inode is cleared. This in turn means that we are not good
2780 * NFSv4 citizens - we do not indicate to the server to update the file's
2781 * share state even when we are done with one of the three share
2782 * stateid's in the inode.
2783 *
2784 * NOTE: Caller must be holding the sp->so_owner semaphore!
2785 */
2786int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2787{
2788 struct nfs_server *server = NFS_SERVER(state->inode);
2789 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2790 struct nfs4_closedata *calldata;
2791 struct nfs4_state_owner *sp = state->owner;
2792 struct rpc_task *task;
2793 struct rpc_message msg = {
2794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2795 .rpc_cred = state->owner->so_cred,
2796 };
2797 struct rpc_task_setup task_setup_data = {
2798 .rpc_client = server->client,
2799 .rpc_message = &msg,
2800 .callback_ops = &nfs4_close_ops,
2801 .workqueue = nfsiod_workqueue,
2802 .flags = RPC_TASK_ASYNC,
2803 };
2804 int status = -ENOMEM;
2805
2806 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2807 &task_setup_data.rpc_client, &msg);
2808
2809 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2810 if (calldata == NULL)
2811 goto out;
2812 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2813 calldata->inode = state->inode;
2814 calldata->state = state;
2815 calldata->arg.fh = NFS_FH(state->inode);
2816 /* Serialization for the sequence id */
2817 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2818 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2819 if (IS_ERR(calldata->arg.seqid))
2820 goto out_free_calldata;
2821 calldata->arg.fmode = 0;
2822 calldata->arg.bitmask = server->cache_consistency_bitmask;
2823 calldata->res.fattr = &calldata->fattr;
2824 calldata->res.seqid = calldata->arg.seqid;
2825 calldata->res.server = server;
2826 calldata->roc = nfs4_roc(state->inode);
2827 nfs_sb_active(calldata->inode->i_sb);
2828
2829 msg.rpc_argp = &calldata->arg;
2830 msg.rpc_resp = &calldata->res;
2831 task_setup_data.callback_data = calldata;
2832 task = rpc_run_task(&task_setup_data);
2833 if (IS_ERR(task))
2834 return PTR_ERR(task);
2835 status = 0;
2836 if (wait)
2837 status = rpc_wait_for_completion_task(task);
2838 rpc_put_task(task);
2839 return status;
2840out_free_calldata:
2841 kfree(calldata);
2842out:
2843 nfs4_put_open_state(state);
2844 nfs4_put_state_owner(sp);
2845 return status;
2846}
2847
2848static struct inode *
2849nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2850 int open_flags, struct iattr *attr, int *opened)
2851{
2852 struct nfs4_state *state;
2853 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2854
2855 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2856
2857 /* Protect against concurrent sillydeletes */
2858 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2859
2860 nfs4_label_release_security(label);
2861
2862 if (IS_ERR(state))
2863 return ERR_CAST(state);
2864 return state->inode;
2865}
2866
2867static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2868{
2869 if (ctx->state == NULL)
2870 return;
2871 if (is_sync)
2872 nfs4_close_sync(ctx->state, ctx->mode);
2873 else
2874 nfs4_close_state(ctx->state, ctx->mode);
2875}
2876
2877#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2878#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2879#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2880
2881static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2882{
2883 struct nfs4_server_caps_arg args = {
2884 .fhandle = fhandle,
2885 };
2886 struct nfs4_server_caps_res res = {};
2887 struct rpc_message msg = {
2888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2889 .rpc_argp = &args,
2890 .rpc_resp = &res,
2891 };
2892 int status;
2893
2894 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2895 if (status == 0) {
2896 /* Sanity check the server answers */
2897 switch (server->nfs_client->cl_minorversion) {
2898 case 0:
2899 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2900 res.attr_bitmask[2] = 0;
2901 break;
2902 case 1:
2903 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2904 break;
2905 case 2:
2906 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2907 }
2908 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2909 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2910 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2911 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2912 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2913 NFS_CAP_CTIME|NFS_CAP_MTIME|
2914 NFS_CAP_SECURITY_LABEL);
2915 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2916 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2917 server->caps |= NFS_CAP_ACLS;
2918 if (res.has_links != 0)
2919 server->caps |= NFS_CAP_HARDLINKS;
2920 if (res.has_symlinks != 0)
2921 server->caps |= NFS_CAP_SYMLINKS;
2922 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2923 server->caps |= NFS_CAP_FILEID;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2925 server->caps |= NFS_CAP_MODE;
2926 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2927 server->caps |= NFS_CAP_NLINK;
2928 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2929 server->caps |= NFS_CAP_OWNER;
2930 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2931 server->caps |= NFS_CAP_OWNER_GROUP;
2932 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2933 server->caps |= NFS_CAP_ATIME;
2934 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2935 server->caps |= NFS_CAP_CTIME;
2936 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2937 server->caps |= NFS_CAP_MTIME;
2938#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2939 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2940 server->caps |= NFS_CAP_SECURITY_LABEL;
2941#endif
2942 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2943 sizeof(server->attr_bitmask));
2944 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2945
2946 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2947 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2948 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2949 server->cache_consistency_bitmask[2] = 0;
2950 server->acl_bitmask = res.acl_bitmask;
2951 server->fh_expire_type = res.fh_expire_type;
2952 }
2953
2954 return status;
2955}
2956
2957int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2958{
2959 struct nfs4_exception exception = { };
2960 int err;
2961 do {
2962 err = nfs4_handle_exception(server,
2963 _nfs4_server_capabilities(server, fhandle),
2964 &exception);
2965 } while (exception.retry);
2966 return err;
2967}
2968
2969static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2970 struct nfs_fsinfo *info)
2971{
2972 u32 bitmask[3];
2973 struct nfs4_lookup_root_arg args = {
2974 .bitmask = bitmask,
2975 };
2976 struct nfs4_lookup_res res = {
2977 .server = server,
2978 .fattr = info->fattr,
2979 .fh = fhandle,
2980 };
2981 struct rpc_message msg = {
2982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2983 .rpc_argp = &args,
2984 .rpc_resp = &res,
2985 };
2986
2987 bitmask[0] = nfs4_fattr_bitmap[0];
2988 bitmask[1] = nfs4_fattr_bitmap[1];
2989 /*
2990 * Process the label in the upcoming getfattr
2991 */
2992 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2993
2994 nfs_fattr_init(info->fattr);
2995 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2996}
2997
2998static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2999 struct nfs_fsinfo *info)
3000{
3001 struct nfs4_exception exception = { };
3002 int err;
3003 do {
3004 err = _nfs4_lookup_root(server, fhandle, info);
3005 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3006 switch (err) {
3007 case 0:
3008 case -NFS4ERR_WRONGSEC:
3009 goto out;
3010 default:
3011 err = nfs4_handle_exception(server, err, &exception);
3012 }
3013 } while (exception.retry);
3014out:
3015 return err;
3016}
3017
3018static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3019 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3020{
3021 struct rpc_auth_create_args auth_args = {
3022 .pseudoflavor = flavor,
3023 };
3024 struct rpc_auth *auth;
3025 int ret;
3026
3027 auth = rpcauth_create(&auth_args, server->client);
3028 if (IS_ERR(auth)) {
3029 ret = -EACCES;
3030 goto out;
3031 }
3032 ret = nfs4_lookup_root(server, fhandle, info);
3033out:
3034 return ret;
3035}
3036
3037/*
3038 * Retry pseudoroot lookup with various security flavors. We do this when:
3039 *
3040 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3041 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3042 *
3043 * Returns zero on success, or a negative NFS4ERR value, or a
3044 * negative errno value.
3045 */
3046static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3047 struct nfs_fsinfo *info)
3048{
3049 /* Per 3530bis 15.33.5 */
3050 static const rpc_authflavor_t flav_array[] = {
3051 RPC_AUTH_GSS_KRB5P,
3052 RPC_AUTH_GSS_KRB5I,
3053 RPC_AUTH_GSS_KRB5,
3054 RPC_AUTH_UNIX, /* courtesy */
3055 RPC_AUTH_NULL,
3056 };
3057 int status = -EPERM;
3058 size_t i;
3059
3060 if (server->auth_info.flavor_len > 0) {
3061 /* try each flavor specified by user */
3062 for (i = 0; i < server->auth_info.flavor_len; i++) {
3063 status = nfs4_lookup_root_sec(server, fhandle, info,
3064 server->auth_info.flavors[i]);
3065 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3066 continue;
3067 break;
3068 }
3069 } else {
3070 /* no flavors specified by user, try default list */
3071 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3072 status = nfs4_lookup_root_sec(server, fhandle, info,
3073 flav_array[i]);
3074 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3075 continue;
3076 break;
3077 }
3078 }
3079
3080 /*
3081 * -EACCESS could mean that the user doesn't have correct permissions
3082 * to access the mount. It could also mean that we tried to mount
3083 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3084 * existing mount programs don't handle -EACCES very well so it should
3085 * be mapped to -EPERM instead.
3086 */
3087 if (status == -EACCES)
3088 status = -EPERM;
3089 return status;
3090}
3091
3092static int nfs4_do_find_root_sec(struct nfs_server *server,
3093 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3094{
3095 int mv = server->nfs_client->cl_minorversion;
3096 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3097}
3098
3099/**
3100 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3101 * @server: initialized nfs_server handle
3102 * @fhandle: we fill in the pseudo-fs root file handle
3103 * @info: we fill in an FSINFO struct
3104 * @auth_probe: probe the auth flavours
3105 *
3106 * Returns zero on success, or a negative errno.
3107 */
3108int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3109 struct nfs_fsinfo *info,
3110 bool auth_probe)
3111{
3112 int status = 0;
3113
3114 if (!auth_probe)
3115 status = nfs4_lookup_root(server, fhandle, info);
3116
3117 if (auth_probe || status == NFS4ERR_WRONGSEC)
3118 status = nfs4_do_find_root_sec(server, fhandle, info);
3119
3120 if (status == 0)
3121 status = nfs4_server_capabilities(server, fhandle);
3122 if (status == 0)
3123 status = nfs4_do_fsinfo(server, fhandle, info);
3124
3125 return nfs4_map_errors(status);
3126}
3127
3128static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3129 struct nfs_fsinfo *info)
3130{
3131 int error;
3132 struct nfs_fattr *fattr = info->fattr;
3133 struct nfs4_label *label = NULL;
3134
3135 error = nfs4_server_capabilities(server, mntfh);
3136 if (error < 0) {
3137 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3138 return error;
3139 }
3140
3141 label = nfs4_label_alloc(server, GFP_KERNEL);
3142 if (IS_ERR(label))
3143 return PTR_ERR(label);
3144
3145 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3146 if (error < 0) {
3147 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3148 goto err_free_label;
3149 }
3150
3151 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3152 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3153 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3154
3155err_free_label:
3156 nfs4_label_free(label);
3157
3158 return error;
3159}
3160
3161/*
3162 * Get locations and (maybe) other attributes of a referral.
3163 * Note that we'll actually follow the referral later when
3164 * we detect fsid mismatch in inode revalidation
3165 */
3166static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3167 const struct qstr *name, struct nfs_fattr *fattr,
3168 struct nfs_fh *fhandle)
3169{
3170 int status = -ENOMEM;
3171 struct page *page = NULL;
3172 struct nfs4_fs_locations *locations = NULL;
3173
3174 page = alloc_page(GFP_KERNEL);
3175 if (page == NULL)
3176 goto out;
3177 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3178 if (locations == NULL)
3179 goto out;
3180
3181 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3182 if (status != 0)
3183 goto out;
3184
3185 /*
3186 * If the fsid didn't change, this is a migration event, not a
3187 * referral. Cause us to drop into the exception handler, which
3188 * will kick off migration recovery.
3189 */
3190 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3191 dprintk("%s: server did not return a different fsid for"
3192 " a referral at %s\n", __func__, name->name);
3193 status = -NFS4ERR_MOVED;
3194 goto out;
3195 }
3196 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3197 nfs_fixup_referral_attributes(&locations->fattr);
3198
3199 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3200 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3201 memset(fhandle, 0, sizeof(struct nfs_fh));
3202out:
3203 if (page)
3204 __free_page(page);
3205 kfree(locations);
3206 return status;
3207}
3208
3209static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3210 struct nfs_fattr *fattr, struct nfs4_label *label)
3211{
3212 struct nfs4_getattr_arg args = {
3213 .fh = fhandle,
3214 .bitmask = server->attr_bitmask,
3215 };
3216 struct nfs4_getattr_res res = {
3217 .fattr = fattr,
3218 .label = label,
3219 .server = server,
3220 };
3221 struct rpc_message msg = {
3222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3223 .rpc_argp = &args,
3224 .rpc_resp = &res,
3225 };
3226
3227 args.bitmask = nfs4_bitmask(server, label);
3228
3229 nfs_fattr_init(fattr);
3230 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3231}
3232
3233static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3234 struct nfs_fattr *fattr, struct nfs4_label *label)
3235{
3236 struct nfs4_exception exception = { };
3237 int err;
3238 do {
3239 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3240 trace_nfs4_getattr(server, fhandle, fattr, err);
3241 err = nfs4_handle_exception(server, err,
3242 &exception);
3243 } while (exception.retry);
3244 return err;
3245}
3246
3247/*
3248 * The file is not closed if it is opened due to the a request to change
3249 * the size of the file. The open call will not be needed once the
3250 * VFS layer lookup-intents are implemented.
3251 *
3252 * Close is called when the inode is destroyed.
3253 * If we haven't opened the file for O_WRONLY, we
3254 * need to in the size_change case to obtain a stateid.
3255 *
3256 * Got race?
3257 * Because OPEN is always done by name in nfsv4, it is
3258 * possible that we opened a different file by the same
3259 * name. We can recognize this race condition, but we
3260 * can't do anything about it besides returning an error.
3261 *
3262 * This will be fixed with VFS changes (lookup-intent).
3263 */
3264static int
3265nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3266 struct iattr *sattr)
3267{
3268 struct inode *inode = d_inode(dentry);
3269 struct rpc_cred *cred = NULL;
3270 struct nfs4_state *state = NULL;
3271 struct nfs4_label *label = NULL;
3272 int status;
3273
3274 if (pnfs_ld_layoutret_on_setattr(inode) &&
3275 sattr->ia_valid & ATTR_SIZE &&
3276 sattr->ia_size < i_size_read(inode))
3277 pnfs_commit_and_return_layout(inode);
3278
3279 nfs_fattr_init(fattr);
3280
3281 /* Deal with open(O_TRUNC) */
3282 if (sattr->ia_valid & ATTR_OPEN)
3283 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3284
3285 /* Optimization: if the end result is no change, don't RPC */
3286 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3287 return 0;
3288
3289 /* Search for an existing open(O_WRITE) file */
3290 if (sattr->ia_valid & ATTR_FILE) {
3291 struct nfs_open_context *ctx;
3292
3293 ctx = nfs_file_open_context(sattr->ia_file);
3294 if (ctx) {
3295 cred = ctx->cred;
3296 state = ctx->state;
3297 }
3298 }
3299
3300 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3301 if (IS_ERR(label))
3302 return PTR_ERR(label);
3303
3304 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3305 if (status == 0) {
3306 nfs_setattr_update_inode(inode, sattr, fattr);
3307 nfs_setsecurity(inode, fattr, label);
3308 }
3309 nfs4_label_free(label);
3310 return status;
3311}
3312
3313static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3314 const struct qstr *name, struct nfs_fh *fhandle,
3315 struct nfs_fattr *fattr, struct nfs4_label *label)
3316{
3317 struct nfs_server *server = NFS_SERVER(dir);
3318 int status;
3319 struct nfs4_lookup_arg args = {
3320 .bitmask = server->attr_bitmask,
3321 .dir_fh = NFS_FH(dir),
3322 .name = name,
3323 };
3324 struct nfs4_lookup_res res = {
3325 .server = server,
3326 .fattr = fattr,
3327 .label = label,
3328 .fh = fhandle,
3329 };
3330 struct rpc_message msg = {
3331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3332 .rpc_argp = &args,
3333 .rpc_resp = &res,
3334 };
3335
3336 args.bitmask = nfs4_bitmask(server, label);
3337
3338 nfs_fattr_init(fattr);
3339
3340 dprintk("NFS call lookup %s\n", name->name);
3341 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3342 dprintk("NFS reply lookup: %d\n", status);
3343 return status;
3344}
3345
3346static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3347{
3348 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3349 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3350 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3351 fattr->nlink = 2;
3352}
3353
3354static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3355 struct qstr *name, struct nfs_fh *fhandle,
3356 struct nfs_fattr *fattr, struct nfs4_label *label)
3357{
3358 struct nfs4_exception exception = { };
3359 struct rpc_clnt *client = *clnt;
3360 int err;
3361 do {
3362 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3363 trace_nfs4_lookup(dir, name, err);
3364 switch (err) {
3365 case -NFS4ERR_BADNAME:
3366 err = -ENOENT;
3367 goto out;
3368 case -NFS4ERR_MOVED:
3369 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3370 if (err == -NFS4ERR_MOVED)
3371 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3372 goto out;
3373 case -NFS4ERR_WRONGSEC:
3374 err = -EPERM;
3375 if (client != *clnt)
3376 goto out;
3377 client = nfs4_negotiate_security(client, dir, name);
3378 if (IS_ERR(client))
3379 return PTR_ERR(client);
3380
3381 exception.retry = 1;
3382 break;
3383 default:
3384 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3385 }
3386 } while (exception.retry);
3387
3388out:
3389 if (err == 0)
3390 *clnt = client;
3391 else if (client != *clnt)
3392 rpc_shutdown_client(client);
3393
3394 return err;
3395}
3396
3397static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3398 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3399 struct nfs4_label *label)
3400{
3401 int status;
3402 struct rpc_clnt *client = NFS_CLIENT(dir);
3403
3404 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3405 if (client != NFS_CLIENT(dir)) {
3406 rpc_shutdown_client(client);
3407 nfs_fixup_secinfo_attributes(fattr);
3408 }
3409 return status;
3410}
3411
3412struct rpc_clnt *
3413nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3414 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3415{
3416 struct rpc_clnt *client = NFS_CLIENT(dir);
3417 int status;
3418
3419 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3420 if (status < 0)
3421 return ERR_PTR(status);
3422 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3423}
3424
3425static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3426{
3427 struct nfs_server *server = NFS_SERVER(inode);
3428 struct nfs4_accessargs args = {
3429 .fh = NFS_FH(inode),
3430 .bitmask = server->cache_consistency_bitmask,
3431 };
3432 struct nfs4_accessres res = {
3433 .server = server,
3434 };
3435 struct rpc_message msg = {
3436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3437 .rpc_argp = &args,
3438 .rpc_resp = &res,
3439 .rpc_cred = entry->cred,
3440 };
3441 int mode = entry->mask;
3442 int status = 0;
3443
3444 /*
3445 * Determine which access bits we want to ask for...
3446 */
3447 if (mode & MAY_READ)
3448 args.access |= NFS4_ACCESS_READ;
3449 if (S_ISDIR(inode->i_mode)) {
3450 if (mode & MAY_WRITE)
3451 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3452 if (mode & MAY_EXEC)
3453 args.access |= NFS4_ACCESS_LOOKUP;
3454 } else {
3455 if (mode & MAY_WRITE)
3456 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3457 if (mode & MAY_EXEC)
3458 args.access |= NFS4_ACCESS_EXECUTE;
3459 }
3460
3461 res.fattr = nfs_alloc_fattr();
3462 if (res.fattr == NULL)
3463 return -ENOMEM;
3464
3465 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3466 if (!status) {
3467 nfs_access_set_mask(entry, res.access);
3468 nfs_refresh_inode(inode, res.fattr);
3469 }
3470 nfs_free_fattr(res.fattr);
3471 return status;
3472}
3473
3474static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3475{
3476 struct nfs4_exception exception = { };
3477 int err;
3478 do {
3479 err = _nfs4_proc_access(inode, entry);
3480 trace_nfs4_access(inode, err);
3481 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3482 &exception);
3483 } while (exception.retry);
3484 return err;
3485}
3486
3487/*
3488 * TODO: For the time being, we don't try to get any attributes
3489 * along with any of the zero-copy operations READ, READDIR,
3490 * READLINK, WRITE.
3491 *
3492 * In the case of the first three, we want to put the GETATTR
3493 * after the read-type operation -- this is because it is hard
3494 * to predict the length of a GETATTR response in v4, and thus
3495 * align the READ data correctly. This means that the GETATTR
3496 * may end up partially falling into the page cache, and we should
3497 * shift it into the 'tail' of the xdr_buf before processing.
3498 * To do this efficiently, we need to know the total length
3499 * of data received, which doesn't seem to be available outside
3500 * of the RPC layer.
3501 *
3502 * In the case of WRITE, we also want to put the GETATTR after
3503 * the operation -- in this case because we want to make sure
3504 * we get the post-operation mtime and size.
3505 *
3506 * Both of these changes to the XDR layer would in fact be quite
3507 * minor, but I decided to leave them for a subsequent patch.
3508 */
3509static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3510 unsigned int pgbase, unsigned int pglen)
3511{
3512 struct nfs4_readlink args = {
3513 .fh = NFS_FH(inode),
3514 .pgbase = pgbase,
3515 .pglen = pglen,
3516 .pages = &page,
3517 };
3518 struct nfs4_readlink_res res;
3519 struct rpc_message msg = {
3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3521 .rpc_argp = &args,
3522 .rpc_resp = &res,
3523 };
3524
3525 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3526}
3527
3528static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3529 unsigned int pgbase, unsigned int pglen)
3530{
3531 struct nfs4_exception exception = { };
3532 int err;
3533 do {
3534 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3535 trace_nfs4_readlink(inode, err);
3536 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3537 &exception);
3538 } while (exception.retry);
3539 return err;
3540}
3541
3542/*
3543 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3544 */
3545static int
3546nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3547 int flags)
3548{
3549 struct nfs4_label l, *ilabel = NULL;
3550 struct nfs_open_context *ctx;
3551 struct nfs4_state *state;
3552 int opened = 0;
3553 int status = 0;
3554
3555 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3556 if (IS_ERR(ctx))
3557 return PTR_ERR(ctx);
3558
3559 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3560
3561 sattr->ia_mode &= ~current_umask();
3562 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3563 if (IS_ERR(state)) {
3564 status = PTR_ERR(state);
3565 goto out;
3566 }
3567out:
3568 nfs4_label_release_security(ilabel);
3569 put_nfs_open_context(ctx);
3570 return status;
3571}
3572
3573static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3574{
3575 struct nfs_server *server = NFS_SERVER(dir);
3576 struct nfs_removeargs args = {
3577 .fh = NFS_FH(dir),
3578 .name = *name,
3579 };
3580 struct nfs_removeres res = {
3581 .server = server,
3582 };
3583 struct rpc_message msg = {
3584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3585 .rpc_argp = &args,
3586 .rpc_resp = &res,
3587 };
3588 int status;
3589
3590 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3591 if (status == 0)
3592 update_changeattr(dir, &res.cinfo);
3593 return status;
3594}
3595
3596static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3597{
3598 struct nfs4_exception exception = { };
3599 int err;
3600 do {
3601 err = _nfs4_proc_remove(dir, name);
3602 trace_nfs4_remove(dir, name, err);
3603 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3604 &exception);
3605 } while (exception.retry);
3606 return err;
3607}
3608
3609static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3610{
3611 struct nfs_server *server = NFS_SERVER(dir);
3612 struct nfs_removeargs *args = msg->rpc_argp;
3613 struct nfs_removeres *res = msg->rpc_resp;
3614
3615 res->server = server;
3616 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3617 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3618
3619 nfs_fattr_init(res->dir_attr);
3620}
3621
3622static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3623{
3624 nfs4_setup_sequence(NFS_SERVER(data->dir),
3625 &data->args.seq_args,
3626 &data->res.seq_res,
3627 task);
3628}
3629
3630static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3631{
3632 struct nfs_unlinkdata *data = task->tk_calldata;
3633 struct nfs_removeres *res = &data->res;
3634
3635 if (!nfs4_sequence_done(task, &res->seq_res))
3636 return 0;
3637 if (nfs4_async_handle_error(task, res->server, NULL,
3638 &data->timeout) == -EAGAIN)
3639 return 0;
3640 update_changeattr(dir, &res->cinfo);
3641 return 1;
3642}
3643
3644static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3645{
3646 struct nfs_server *server = NFS_SERVER(dir);
3647 struct nfs_renameargs *arg = msg->rpc_argp;
3648 struct nfs_renameres *res = msg->rpc_resp;
3649
3650 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3651 res->server = server;
3652 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3653}
3654
3655static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3656{
3657 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3658 &data->args.seq_args,
3659 &data->res.seq_res,
3660 task);
3661}
3662
3663static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3664 struct inode *new_dir)
3665{
3666 struct nfs_renamedata *data = task->tk_calldata;
3667 struct nfs_renameres *res = &data->res;
3668
3669 if (!nfs4_sequence_done(task, &res->seq_res))
3670 return 0;
3671 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3672 return 0;
3673
3674 update_changeattr(old_dir, &res->old_cinfo);
3675 update_changeattr(new_dir, &res->new_cinfo);
3676 return 1;
3677}
3678
3679static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3680{
3681 struct nfs_server *server = NFS_SERVER(inode);
3682 struct nfs4_link_arg arg = {
3683 .fh = NFS_FH(inode),
3684 .dir_fh = NFS_FH(dir),
3685 .name = name,
3686 .bitmask = server->attr_bitmask,
3687 };
3688 struct nfs4_link_res res = {
3689 .server = server,
3690 .label = NULL,
3691 };
3692 struct rpc_message msg = {
3693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3694 .rpc_argp = &arg,
3695 .rpc_resp = &res,
3696 };
3697 int status = -ENOMEM;
3698
3699 res.fattr = nfs_alloc_fattr();
3700 if (res.fattr == NULL)
3701 goto out;
3702
3703 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3704 if (IS_ERR(res.label)) {
3705 status = PTR_ERR(res.label);
3706 goto out;
3707 }
3708 arg.bitmask = nfs4_bitmask(server, res.label);
3709
3710 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3711 if (!status) {
3712 update_changeattr(dir, &res.cinfo);
3713 status = nfs_post_op_update_inode(inode, res.fattr);
3714 if (!status)
3715 nfs_setsecurity(inode, res.fattr, res.label);
3716 }
3717
3718
3719 nfs4_label_free(res.label);
3720
3721out:
3722 nfs_free_fattr(res.fattr);
3723 return status;
3724}
3725
3726static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3727{
3728 struct nfs4_exception exception = { };
3729 int err;
3730 do {
3731 err = nfs4_handle_exception(NFS_SERVER(inode),
3732 _nfs4_proc_link(inode, dir, name),
3733 &exception);
3734 } while (exception.retry);
3735 return err;
3736}
3737
3738struct nfs4_createdata {
3739 struct rpc_message msg;
3740 struct nfs4_create_arg arg;
3741 struct nfs4_create_res res;
3742 struct nfs_fh fh;
3743 struct nfs_fattr fattr;
3744 struct nfs4_label *label;
3745};
3746
3747static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3748 struct qstr *name, struct iattr *sattr, u32 ftype)
3749{
3750 struct nfs4_createdata *data;
3751
3752 data = kzalloc(sizeof(*data), GFP_KERNEL);
3753 if (data != NULL) {
3754 struct nfs_server *server = NFS_SERVER(dir);
3755
3756 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3757 if (IS_ERR(data->label))
3758 goto out_free;
3759
3760 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3761 data->msg.rpc_argp = &data->arg;
3762 data->msg.rpc_resp = &data->res;
3763 data->arg.dir_fh = NFS_FH(dir);
3764 data->arg.server = server;
3765 data->arg.name = name;
3766 data->arg.attrs = sattr;
3767 data->arg.ftype = ftype;
3768 data->arg.bitmask = nfs4_bitmask(server, data->label);
3769 data->res.server = server;
3770 data->res.fh = &data->fh;
3771 data->res.fattr = &data->fattr;
3772 data->res.label = data->label;
3773 nfs_fattr_init(data->res.fattr);
3774 }
3775 return data;
3776out_free:
3777 kfree(data);
3778 return NULL;
3779}
3780
3781static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3782{
3783 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3784 &data->arg.seq_args, &data->res.seq_res, 1);
3785 if (status == 0) {
3786 update_changeattr(dir, &data->res.dir_cinfo);
3787 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3788 }
3789 return status;
3790}
3791
3792static void nfs4_free_createdata(struct nfs4_createdata *data)
3793{
3794 nfs4_label_free(data->label);
3795 kfree(data);
3796}
3797
3798static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3799 struct page *page, unsigned int len, struct iattr *sattr,
3800 struct nfs4_label *label)
3801{
3802 struct nfs4_createdata *data;
3803 int status = -ENAMETOOLONG;
3804
3805 if (len > NFS4_MAXPATHLEN)
3806 goto out;
3807
3808 status = -ENOMEM;
3809 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3810 if (data == NULL)
3811 goto out;
3812
3813 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3814 data->arg.u.symlink.pages = &page;
3815 data->arg.u.symlink.len = len;
3816 data->arg.label = label;
3817
3818 status = nfs4_do_create(dir, dentry, data);
3819
3820 nfs4_free_createdata(data);
3821out:
3822 return status;
3823}
3824
3825static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3826 struct page *page, unsigned int len, struct iattr *sattr)
3827{
3828 struct nfs4_exception exception = { };
3829 struct nfs4_label l, *label = NULL;
3830 int err;
3831
3832 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3833
3834 do {
3835 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3836 trace_nfs4_symlink(dir, &dentry->d_name, err);
3837 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3838 &exception);
3839 } while (exception.retry);
3840
3841 nfs4_label_release_security(label);
3842 return err;
3843}
3844
3845static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3846 struct iattr *sattr, struct nfs4_label *label)
3847{
3848 struct nfs4_createdata *data;
3849 int status = -ENOMEM;
3850
3851 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3852 if (data == NULL)
3853 goto out;
3854
3855 data->arg.label = label;
3856 status = nfs4_do_create(dir, dentry, data);
3857
3858 nfs4_free_createdata(data);
3859out:
3860 return status;
3861}
3862
3863static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3864 struct iattr *sattr)
3865{
3866 struct nfs4_exception exception = { };
3867 struct nfs4_label l, *label = NULL;
3868 int err;
3869
3870 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3871
3872 sattr->ia_mode &= ~current_umask();
3873 do {
3874 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3875 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3876 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3877 &exception);
3878 } while (exception.retry);
3879 nfs4_label_release_security(label);
3880
3881 return err;
3882}
3883
3884static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3885 u64 cookie, struct page **pages, unsigned int count, int plus)
3886{
3887 struct inode *dir = d_inode(dentry);
3888 struct nfs4_readdir_arg args = {
3889 .fh = NFS_FH(dir),
3890 .pages = pages,
3891 .pgbase = 0,
3892 .count = count,
3893 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
3894 .plus = plus,
3895 };
3896 struct nfs4_readdir_res res;
3897 struct rpc_message msg = {
3898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3899 .rpc_argp = &args,
3900 .rpc_resp = &res,
3901 .rpc_cred = cred,
3902 };
3903 int status;
3904
3905 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3906 dentry,
3907 (unsigned long long)cookie);
3908 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3909 res.pgbase = args.pgbase;
3910 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3911 if (status >= 0) {
3912 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3913 status += args.pgbase;
3914 }
3915
3916 nfs_invalidate_atime(dir);
3917
3918 dprintk("%s: returns %d\n", __func__, status);
3919 return status;
3920}
3921
3922static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3923 u64 cookie, struct page **pages, unsigned int count, int plus)
3924{
3925 struct nfs4_exception exception = { };
3926 int err;
3927 do {
3928 err = _nfs4_proc_readdir(dentry, cred, cookie,
3929 pages, count, plus);
3930 trace_nfs4_readdir(d_inode(dentry), err);
3931 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
3932 &exception);
3933 } while (exception.retry);
3934 return err;
3935}
3936
3937static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3938 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3939{
3940 struct nfs4_createdata *data;
3941 int mode = sattr->ia_mode;
3942 int status = -ENOMEM;
3943
3944 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3945 if (data == NULL)
3946 goto out;
3947
3948 if (S_ISFIFO(mode))
3949 data->arg.ftype = NF4FIFO;
3950 else if (S_ISBLK(mode)) {
3951 data->arg.ftype = NF4BLK;
3952 data->arg.u.device.specdata1 = MAJOR(rdev);
3953 data->arg.u.device.specdata2 = MINOR(rdev);
3954 }
3955 else if (S_ISCHR(mode)) {
3956 data->arg.ftype = NF4CHR;
3957 data->arg.u.device.specdata1 = MAJOR(rdev);
3958 data->arg.u.device.specdata2 = MINOR(rdev);
3959 } else if (!S_ISSOCK(mode)) {
3960 status = -EINVAL;
3961 goto out_free;
3962 }
3963
3964 data->arg.label = label;
3965 status = nfs4_do_create(dir, dentry, data);
3966out_free:
3967 nfs4_free_createdata(data);
3968out:
3969 return status;
3970}
3971
3972static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3973 struct iattr *sattr, dev_t rdev)
3974{
3975 struct nfs4_exception exception = { };
3976 struct nfs4_label l, *label = NULL;
3977 int err;
3978
3979 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3980
3981 sattr->ia_mode &= ~current_umask();
3982 do {
3983 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3984 trace_nfs4_mknod(dir, &dentry->d_name, err);
3985 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3986 &exception);
3987 } while (exception.retry);
3988
3989 nfs4_label_release_security(label);
3990
3991 return err;
3992}
3993
3994static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3995 struct nfs_fsstat *fsstat)
3996{
3997 struct nfs4_statfs_arg args = {
3998 .fh = fhandle,
3999 .bitmask = server->attr_bitmask,
4000 };
4001 struct nfs4_statfs_res res = {
4002 .fsstat = fsstat,
4003 };
4004 struct rpc_message msg = {
4005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4006 .rpc_argp = &args,
4007 .rpc_resp = &res,
4008 };
4009
4010 nfs_fattr_init(fsstat->fattr);
4011 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4012}
4013
4014static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4015{
4016 struct nfs4_exception exception = { };
4017 int err;
4018 do {
4019 err = nfs4_handle_exception(server,
4020 _nfs4_proc_statfs(server, fhandle, fsstat),
4021 &exception);
4022 } while (exception.retry);
4023 return err;
4024}
4025
4026static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4027 struct nfs_fsinfo *fsinfo)
4028{
4029 struct nfs4_fsinfo_arg args = {
4030 .fh = fhandle,
4031 .bitmask = server->attr_bitmask,
4032 };
4033 struct nfs4_fsinfo_res res = {
4034 .fsinfo = fsinfo,
4035 };
4036 struct rpc_message msg = {
4037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4038 .rpc_argp = &args,
4039 .rpc_resp = &res,
4040 };
4041
4042 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4043}
4044
4045static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4046{
4047 struct nfs4_exception exception = { };
4048 unsigned long now = jiffies;
4049 int err;
4050
4051 do {
4052 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4053 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4054 if (err == 0) {
4055 struct nfs_client *clp = server->nfs_client;
4056
4057 spin_lock(&clp->cl_lock);
4058 clp->cl_lease_time = fsinfo->lease_time * HZ;
4059 clp->cl_last_renewal = now;
4060 spin_unlock(&clp->cl_lock);
4061 break;
4062 }
4063 err = nfs4_handle_exception(server, err, &exception);
4064 } while (exception.retry);
4065 return err;
4066}
4067
4068static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4069{
4070 int error;
4071
4072 nfs_fattr_init(fsinfo->fattr);
4073 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4074 if (error == 0) {
4075 /* block layout checks this! */
4076 server->pnfs_blksize = fsinfo->blksize;
4077 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4078 }
4079
4080 return error;
4081}
4082
4083static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4084 struct nfs_pathconf *pathconf)
4085{
4086 struct nfs4_pathconf_arg args = {
4087 .fh = fhandle,
4088 .bitmask = server->attr_bitmask,
4089 };
4090 struct nfs4_pathconf_res res = {
4091 .pathconf = pathconf,
4092 };
4093 struct rpc_message msg = {
4094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4095 .rpc_argp = &args,
4096 .rpc_resp = &res,
4097 };
4098
4099 /* None of the pathconf attributes are mandatory to implement */
4100 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4101 memset(pathconf, 0, sizeof(*pathconf));
4102 return 0;
4103 }
4104
4105 nfs_fattr_init(pathconf->fattr);
4106 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4107}
4108
4109static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4110 struct nfs_pathconf *pathconf)
4111{
4112 struct nfs4_exception exception = { };
4113 int err;
4114
4115 do {
4116 err = nfs4_handle_exception(server,
4117 _nfs4_proc_pathconf(server, fhandle, pathconf),
4118 &exception);
4119 } while (exception.retry);
4120 return err;
4121}
4122
4123int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4124 const struct nfs_open_context *ctx,
4125 const struct nfs_lock_context *l_ctx,
4126 fmode_t fmode)
4127{
4128 const struct nfs_lockowner *lockowner = NULL;
4129
4130 if (l_ctx != NULL)
4131 lockowner = &l_ctx->lockowner;
4132 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4133}
4134EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4135
4136static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4137 const struct nfs_open_context *ctx,
4138 const struct nfs_lock_context *l_ctx,
4139 fmode_t fmode)
4140{
4141 nfs4_stateid current_stateid;
4142
4143 /* If the current stateid represents a lost lock, then exit */
4144 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4145 return true;
4146 return nfs4_stateid_match(stateid, &current_stateid);
4147}
4148
4149static bool nfs4_error_stateid_expired(int err)
4150{
4151 switch (err) {
4152 case -NFS4ERR_DELEG_REVOKED:
4153 case -NFS4ERR_ADMIN_REVOKED:
4154 case -NFS4ERR_BAD_STATEID:
4155 case -NFS4ERR_STALE_STATEID:
4156 case -NFS4ERR_OLD_STATEID:
4157 case -NFS4ERR_OPENMODE:
4158 case -NFS4ERR_EXPIRED:
4159 return true;
4160 }
4161 return false;
4162}
4163
4164void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4165{
4166 nfs_invalidate_atime(hdr->inode);
4167}
4168
4169static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4170{
4171 struct nfs_server *server = NFS_SERVER(hdr->inode);
4172
4173 trace_nfs4_read(hdr, task->tk_status);
4174 if (nfs4_async_handle_error(task, server,
4175 hdr->args.context->state,
4176 NULL) == -EAGAIN) {
4177 rpc_restart_call_prepare(task);
4178 return -EAGAIN;
4179 }
4180
4181 __nfs4_read_done_cb(hdr);
4182 if (task->tk_status > 0)
4183 renew_lease(server, hdr->timestamp);
4184 return 0;
4185}
4186
4187static bool nfs4_read_stateid_changed(struct rpc_task *task,
4188 struct nfs_pgio_args *args)
4189{
4190
4191 if (!nfs4_error_stateid_expired(task->tk_status) ||
4192 nfs4_stateid_is_current(&args->stateid,
4193 args->context,
4194 args->lock_context,
4195 FMODE_READ))
4196 return false;
4197 rpc_restart_call_prepare(task);
4198 return true;
4199}
4200
4201static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4202{
4203
4204 dprintk("--> %s\n", __func__);
4205
4206 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4207 return -EAGAIN;
4208 if (nfs4_read_stateid_changed(task, &hdr->args))
4209 return -EAGAIN;
4210 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4211 nfs4_read_done_cb(task, hdr);
4212}
4213
4214static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4215 struct rpc_message *msg)
4216{
4217 hdr->timestamp = jiffies;
4218 hdr->pgio_done_cb = nfs4_read_done_cb;
4219 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4220 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4221}
4222
4223static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4224 struct nfs_pgio_header *hdr)
4225{
4226 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4227 &hdr->args.seq_args,
4228 &hdr->res.seq_res,
4229 task))
4230 return 0;
4231 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4232 hdr->args.lock_context,
4233 hdr->rw_ops->rw_mode) == -EIO)
4234 return -EIO;
4235 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4236 return -EIO;
4237 return 0;
4238}
4239
4240static int nfs4_write_done_cb(struct rpc_task *task,
4241 struct nfs_pgio_header *hdr)
4242{
4243 struct inode *inode = hdr->inode;
4244
4245 trace_nfs4_write(hdr, task->tk_status);
4246 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4247 hdr->args.context->state,
4248 NULL) == -EAGAIN) {
4249 rpc_restart_call_prepare(task);
4250 return -EAGAIN;
4251 }
4252 if (task->tk_status >= 0) {
4253 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4254 nfs_writeback_update_inode(hdr);
4255 }
4256 return 0;
4257}
4258
4259static bool nfs4_write_stateid_changed(struct rpc_task *task,
4260 struct nfs_pgio_args *args)
4261{
4262
4263 if (!nfs4_error_stateid_expired(task->tk_status) ||
4264 nfs4_stateid_is_current(&args->stateid,
4265 args->context,
4266 args->lock_context,
4267 FMODE_WRITE))
4268 return false;
4269 rpc_restart_call_prepare(task);
4270 return true;
4271}
4272
4273static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4274{
4275 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4276 return -EAGAIN;
4277 if (nfs4_write_stateid_changed(task, &hdr->args))
4278 return -EAGAIN;
4279 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4280 nfs4_write_done_cb(task, hdr);
4281}
4282
4283static
4284bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4285{
4286 /* Don't request attributes for pNFS or O_DIRECT writes */
4287 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4288 return false;
4289 /* Otherwise, request attributes if and only if we don't hold
4290 * a delegation
4291 */
4292 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4293}
4294
4295static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4296 struct rpc_message *msg)
4297{
4298 struct nfs_server *server = NFS_SERVER(hdr->inode);
4299
4300 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4301 hdr->args.bitmask = NULL;
4302 hdr->res.fattr = NULL;
4303 } else
4304 hdr->args.bitmask = server->cache_consistency_bitmask;
4305
4306 if (!hdr->pgio_done_cb)
4307 hdr->pgio_done_cb = nfs4_write_done_cb;
4308 hdr->res.server = server;
4309 hdr->timestamp = jiffies;
4310
4311 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4312 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4313}
4314
4315static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4316{
4317 nfs4_setup_sequence(NFS_SERVER(data->inode),
4318 &data->args.seq_args,
4319 &data->res.seq_res,
4320 task);
4321}
4322
4323static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4324{
4325 struct inode *inode = data->inode;
4326
4327 trace_nfs4_commit(data, task->tk_status);
4328 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4329 NULL, NULL) == -EAGAIN) {
4330 rpc_restart_call_prepare(task);
4331 return -EAGAIN;
4332 }
4333 return 0;
4334}
4335
4336static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4337{
4338 if (!nfs4_sequence_done(task, &data->res.seq_res))
4339 return -EAGAIN;
4340 return data->commit_done_cb(task, data);
4341}
4342
4343static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4344{
4345 struct nfs_server *server = NFS_SERVER(data->inode);
4346
4347 if (data->commit_done_cb == NULL)
4348 data->commit_done_cb = nfs4_commit_done_cb;
4349 data->res.server = server;
4350 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4351 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4352}
4353
4354struct nfs4_renewdata {
4355 struct nfs_client *client;
4356 unsigned long timestamp;
4357};
4358
4359/*
4360 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4361 * standalone procedure for queueing an asynchronous RENEW.
4362 */
4363static void nfs4_renew_release(void *calldata)
4364{
4365 struct nfs4_renewdata *data = calldata;
4366 struct nfs_client *clp = data->client;
4367
4368 if (atomic_read(&clp->cl_count) > 1)
4369 nfs4_schedule_state_renewal(clp);
4370 nfs_put_client(clp);
4371 kfree(data);
4372}
4373
4374static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4375{
4376 struct nfs4_renewdata *data = calldata;
4377 struct nfs_client *clp = data->client;
4378 unsigned long timestamp = data->timestamp;
4379
4380 trace_nfs4_renew_async(clp, task->tk_status);
4381 switch (task->tk_status) {
4382 case 0:
4383 break;
4384 case -NFS4ERR_LEASE_MOVED:
4385 nfs4_schedule_lease_moved_recovery(clp);
4386 break;
4387 default:
4388 /* Unless we're shutting down, schedule state recovery! */
4389 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4390 return;
4391 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4392 nfs4_schedule_lease_recovery(clp);
4393 return;
4394 }
4395 nfs4_schedule_path_down_recovery(clp);
4396 }
4397 do_renew_lease(clp, timestamp);
4398}
4399
4400static const struct rpc_call_ops nfs4_renew_ops = {
4401 .rpc_call_done = nfs4_renew_done,
4402 .rpc_release = nfs4_renew_release,
4403};
4404
4405static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4406{
4407 struct rpc_message msg = {
4408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4409 .rpc_argp = clp,
4410 .rpc_cred = cred,
4411 };
4412 struct nfs4_renewdata *data;
4413
4414 if (renew_flags == 0)
4415 return 0;
4416 if (!atomic_inc_not_zero(&clp->cl_count))
4417 return -EIO;
4418 data = kmalloc(sizeof(*data), GFP_NOFS);
4419 if (data == NULL)
4420 return -ENOMEM;
4421 data->client = clp;
4422 data->timestamp = jiffies;
4423 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4424 &nfs4_renew_ops, data);
4425}
4426
4427static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4428{
4429 struct rpc_message msg = {
4430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4431 .rpc_argp = clp,
4432 .rpc_cred = cred,
4433 };
4434 unsigned long now = jiffies;
4435 int status;
4436
4437 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4438 if (status < 0)
4439 return status;
4440 do_renew_lease(clp, now);
4441 return 0;
4442}
4443
4444static inline int nfs4_server_supports_acls(struct nfs_server *server)
4445{
4446 return server->caps & NFS_CAP_ACLS;
4447}
4448
4449/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4450 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4451 * the stack.
4452 */
4453#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4454
4455static int buf_to_pages_noslab(const void *buf, size_t buflen,
4456 struct page **pages, unsigned int *pgbase)
4457{
4458 struct page *newpage, **spages;
4459 int rc = 0;
4460 size_t len;
4461 spages = pages;
4462
4463 do {
4464 len = min_t(size_t, PAGE_SIZE, buflen);
4465 newpage = alloc_page(GFP_KERNEL);
4466
4467 if (newpage == NULL)
4468 goto unwind;
4469 memcpy(page_address(newpage), buf, len);
4470 buf += len;
4471 buflen -= len;
4472 *pages++ = newpage;
4473 rc++;
4474 } while (buflen != 0);
4475
4476 return rc;
4477
4478unwind:
4479 for(; rc > 0; rc--)
4480 __free_page(spages[rc-1]);
4481 return -ENOMEM;
4482}
4483
4484struct nfs4_cached_acl {
4485 int cached;
4486 size_t len;
4487 char data[0];
4488};
4489
4490static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4491{
4492 struct nfs_inode *nfsi = NFS_I(inode);
4493
4494 spin_lock(&inode->i_lock);
4495 kfree(nfsi->nfs4_acl);
4496 nfsi->nfs4_acl = acl;
4497 spin_unlock(&inode->i_lock);
4498}
4499
4500static void nfs4_zap_acl_attr(struct inode *inode)
4501{
4502 nfs4_set_cached_acl(inode, NULL);
4503}
4504
4505static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4506{
4507 struct nfs_inode *nfsi = NFS_I(inode);
4508 struct nfs4_cached_acl *acl;
4509 int ret = -ENOENT;
4510
4511 spin_lock(&inode->i_lock);
4512 acl = nfsi->nfs4_acl;
4513 if (acl == NULL)
4514 goto out;
4515 if (buf == NULL) /* user is just asking for length */
4516 goto out_len;
4517 if (acl->cached == 0)
4518 goto out;
4519 ret = -ERANGE; /* see getxattr(2) man page */
4520 if (acl->len > buflen)
4521 goto out;
4522 memcpy(buf, acl->data, acl->len);
4523out_len:
4524 ret = acl->len;
4525out:
4526 spin_unlock(&inode->i_lock);
4527 return ret;
4528}
4529
4530static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4531{
4532 struct nfs4_cached_acl *acl;
4533 size_t buflen = sizeof(*acl) + acl_len;
4534
4535 if (buflen <= PAGE_SIZE) {
4536 acl = kmalloc(buflen, GFP_KERNEL);
4537 if (acl == NULL)
4538 goto out;
4539 acl->cached = 1;
4540 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4541 } else {
4542 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4543 if (acl == NULL)
4544 goto out;
4545 acl->cached = 0;
4546 }
4547 acl->len = acl_len;
4548out:
4549 nfs4_set_cached_acl(inode, acl);
4550}
4551
4552/*
4553 * The getxattr API returns the required buffer length when called with a
4554 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4555 * the required buf. On a NULL buf, we send a page of data to the server
4556 * guessing that the ACL request can be serviced by a page. If so, we cache
4557 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4558 * the cache. If not so, we throw away the page, and cache the required
4559 * length. The next getxattr call will then produce another round trip to
4560 * the server, this time with the input buf of the required size.
4561 */
4562static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4563{
4564 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4565 struct nfs_getaclargs args = {
4566 .fh = NFS_FH(inode),
4567 .acl_pages = pages,
4568 .acl_len = buflen,
4569 };
4570 struct nfs_getaclres res = {
4571 .acl_len = buflen,
4572 };
4573 struct rpc_message msg = {
4574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4575 .rpc_argp = &args,
4576 .rpc_resp = &res,
4577 };
4578 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4579 int ret = -ENOMEM, i;
4580
4581 /* As long as we're doing a round trip to the server anyway,
4582 * let's be prepared for a page of acl data. */
4583 if (npages == 0)
4584 npages = 1;
4585 if (npages > ARRAY_SIZE(pages))
4586 return -ERANGE;
4587
4588 for (i = 0; i < npages; i++) {
4589 pages[i] = alloc_page(GFP_KERNEL);
4590 if (!pages[i])
4591 goto out_free;
4592 }
4593
4594 /* for decoding across pages */
4595 res.acl_scratch = alloc_page(GFP_KERNEL);
4596 if (!res.acl_scratch)
4597 goto out_free;
4598
4599 args.acl_len = npages * PAGE_SIZE;
4600 args.acl_pgbase = 0;
4601
4602 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4603 __func__, buf, buflen, npages, args.acl_len);
4604 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4605 &msg, &args.seq_args, &res.seq_res, 0);
4606 if (ret)
4607 goto out_free;
4608
4609 /* Handle the case where the passed-in buffer is too short */
4610 if (res.acl_flags & NFS4_ACL_TRUNC) {
4611 /* Did the user only issue a request for the acl length? */
4612 if (buf == NULL)
4613 goto out_ok;
4614 ret = -ERANGE;
4615 goto out_free;
4616 }
4617 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4618 if (buf) {
4619 if (res.acl_len > buflen) {
4620 ret = -ERANGE;
4621 goto out_free;
4622 }
4623 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4624 }
4625out_ok:
4626 ret = res.acl_len;
4627out_free:
4628 for (i = 0; i < npages; i++)
4629 if (pages[i])
4630 __free_page(pages[i]);
4631 if (res.acl_scratch)
4632 __free_page(res.acl_scratch);
4633 return ret;
4634}
4635
4636static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4637{
4638 struct nfs4_exception exception = { };
4639 ssize_t ret;
4640 do {
4641 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4642 trace_nfs4_get_acl(inode, ret);
4643 if (ret >= 0)
4644 break;
4645 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4646 } while (exception.retry);
4647 return ret;
4648}
4649
4650static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4651{
4652 struct nfs_server *server = NFS_SERVER(inode);
4653 int ret;
4654
4655 if (!nfs4_server_supports_acls(server))
4656 return -EOPNOTSUPP;
4657 ret = nfs_revalidate_inode(server, inode);
4658 if (ret < 0)
4659 return ret;
4660 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4661 nfs_zap_acl_cache(inode);
4662 ret = nfs4_read_cached_acl(inode, buf, buflen);
4663 if (ret != -ENOENT)
4664 /* -ENOENT is returned if there is no ACL or if there is an ACL
4665 * but no cached acl data, just the acl length */
4666 return ret;
4667 return nfs4_get_acl_uncached(inode, buf, buflen);
4668}
4669
4670static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4671{
4672 struct nfs_server *server = NFS_SERVER(inode);
4673 struct page *pages[NFS4ACL_MAXPAGES];
4674 struct nfs_setaclargs arg = {
4675 .fh = NFS_FH(inode),
4676 .acl_pages = pages,
4677 .acl_len = buflen,
4678 };
4679 struct nfs_setaclres res;
4680 struct rpc_message msg = {
4681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4682 .rpc_argp = &arg,
4683 .rpc_resp = &res,
4684 };
4685 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4686 int ret, i;
4687
4688 if (!nfs4_server_supports_acls(server))
4689 return -EOPNOTSUPP;
4690 if (npages > ARRAY_SIZE(pages))
4691 return -ERANGE;
4692 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4693 if (i < 0)
4694 return i;
4695 nfs4_inode_return_delegation(inode);
4696 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4697
4698 /*
4699 * Free each page after tx, so the only ref left is
4700 * held by the network stack
4701 */
4702 for (; i > 0; i--)
4703 put_page(pages[i-1]);
4704
4705 /*
4706 * Acl update can result in inode attribute update.
4707 * so mark the attribute cache invalid.
4708 */
4709 spin_lock(&inode->i_lock);
4710 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4711 spin_unlock(&inode->i_lock);
4712 nfs_access_zap_cache(inode);
4713 nfs_zap_acl_cache(inode);
4714 return ret;
4715}
4716
4717static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4718{
4719 struct nfs4_exception exception = { };
4720 int err;
4721 do {
4722 err = __nfs4_proc_set_acl(inode, buf, buflen);
4723 trace_nfs4_set_acl(inode, err);
4724 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4725 &exception);
4726 } while (exception.retry);
4727 return err;
4728}
4729
4730#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4731static int _nfs4_get_security_label(struct inode *inode, void *buf,
4732 size_t buflen)
4733{
4734 struct nfs_server *server = NFS_SERVER(inode);
4735 struct nfs_fattr fattr;
4736 struct nfs4_label label = {0, 0, buflen, buf};
4737
4738 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4739 struct nfs4_getattr_arg arg = {
4740 .fh = NFS_FH(inode),
4741 .bitmask = bitmask,
4742 };
4743 struct nfs4_getattr_res res = {
4744 .fattr = &fattr,
4745 .label = &label,
4746 .server = server,
4747 };
4748 struct rpc_message msg = {
4749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4750 .rpc_argp = &arg,
4751 .rpc_resp = &res,
4752 };
4753 int ret;
4754
4755 nfs_fattr_init(&fattr);
4756
4757 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4758 if (ret)
4759 return ret;
4760 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4761 return -ENOENT;
4762 if (buflen < label.len)
4763 return -ERANGE;
4764 return 0;
4765}
4766
4767static int nfs4_get_security_label(struct inode *inode, void *buf,
4768 size_t buflen)
4769{
4770 struct nfs4_exception exception = { };
4771 int err;
4772
4773 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4774 return -EOPNOTSUPP;
4775
4776 do {
4777 err = _nfs4_get_security_label(inode, buf, buflen);
4778 trace_nfs4_get_security_label(inode, err);
4779 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4780 &exception);
4781 } while (exception.retry);
4782 return err;
4783}
4784
4785static int _nfs4_do_set_security_label(struct inode *inode,
4786 struct nfs4_label *ilabel,
4787 struct nfs_fattr *fattr,
4788 struct nfs4_label *olabel)
4789{
4790
4791 struct iattr sattr = {0};
4792 struct nfs_server *server = NFS_SERVER(inode);
4793 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4794 struct nfs_setattrargs arg = {
4795 .fh = NFS_FH(inode),
4796 .iap = &sattr,
4797 .server = server,
4798 .bitmask = bitmask,
4799 .label = ilabel,
4800 };
4801 struct nfs_setattrres res = {
4802 .fattr = fattr,
4803 .label = olabel,
4804 .server = server,
4805 };
4806 struct rpc_message msg = {
4807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4808 .rpc_argp = &arg,
4809 .rpc_resp = &res,
4810 };
4811 int status;
4812
4813 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4814
4815 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4816 if (status)
4817 dprintk("%s failed: %d\n", __func__, status);
4818
4819 return status;
4820}
4821
4822static int nfs4_do_set_security_label(struct inode *inode,
4823 struct nfs4_label *ilabel,
4824 struct nfs_fattr *fattr,
4825 struct nfs4_label *olabel)
4826{
4827 struct nfs4_exception exception = { };
4828 int err;
4829
4830 do {
4831 err = _nfs4_do_set_security_label(inode, ilabel,
4832 fattr, olabel);
4833 trace_nfs4_set_security_label(inode, err);
4834 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4835 &exception);
4836 } while (exception.retry);
4837 return err;
4838}
4839
4840static int
4841nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4842{
4843 struct nfs4_label ilabel, *olabel = NULL;
4844 struct nfs_fattr fattr;
4845 struct rpc_cred *cred;
4846 struct inode *inode = d_inode(dentry);
4847 int status;
4848
4849 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4850 return -EOPNOTSUPP;
4851
4852 nfs_fattr_init(&fattr);
4853
4854 ilabel.pi = 0;
4855 ilabel.lfs = 0;
4856 ilabel.label = (char *)buf;
4857 ilabel.len = buflen;
4858
4859 cred = rpc_lookup_cred();
4860 if (IS_ERR(cred))
4861 return PTR_ERR(cred);
4862
4863 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4864 if (IS_ERR(olabel)) {
4865 status = -PTR_ERR(olabel);
4866 goto out;
4867 }
4868
4869 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4870 if (status == 0)
4871 nfs_setsecurity(inode, &fattr, olabel);
4872
4873 nfs4_label_free(olabel);
4874out:
4875 put_rpccred(cred);
4876 return status;
4877}
4878#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4879
4880
4881static int
4882nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4883 struct nfs4_state *state, long *timeout)
4884{
4885 struct nfs_client *clp = server->nfs_client;
4886
4887 if (task->tk_status >= 0)
4888 return 0;
4889 switch(task->tk_status) {
4890 case -NFS4ERR_DELEG_REVOKED:
4891 case -NFS4ERR_ADMIN_REVOKED:
4892 case -NFS4ERR_BAD_STATEID:
4893 case -NFS4ERR_OPENMODE:
4894 if (state == NULL)
4895 break;
4896 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4897 goto recovery_failed;
4898 goto wait_on_recovery;
4899 case -NFS4ERR_EXPIRED:
4900 if (state != NULL) {
4901 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4902 goto recovery_failed;
4903 }
4904 case -NFS4ERR_STALE_STATEID:
4905 case -NFS4ERR_STALE_CLIENTID:
4906 nfs4_schedule_lease_recovery(clp);
4907 goto wait_on_recovery;
4908 case -NFS4ERR_MOVED:
4909 if (nfs4_schedule_migration_recovery(server) < 0)
4910 goto recovery_failed;
4911 goto wait_on_recovery;
4912 case -NFS4ERR_LEASE_MOVED:
4913 nfs4_schedule_lease_moved_recovery(clp);
4914 goto wait_on_recovery;
4915#if defined(CONFIG_NFS_V4_1)
4916 case -NFS4ERR_BADSESSION:
4917 case -NFS4ERR_BADSLOT:
4918 case -NFS4ERR_BAD_HIGH_SLOT:
4919 case -NFS4ERR_DEADSESSION:
4920 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4921 case -NFS4ERR_SEQ_FALSE_RETRY:
4922 case -NFS4ERR_SEQ_MISORDERED:
4923 dprintk("%s ERROR %d, Reset session\n", __func__,
4924 task->tk_status);
4925 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4926 goto wait_on_recovery;
4927#endif /* CONFIG_NFS_V4_1 */
4928 case -NFS4ERR_DELAY:
4929 nfs_inc_server_stats(server, NFSIOS_DELAY);
4930 rpc_delay(task, nfs4_update_delay(timeout));
4931 goto restart_call;
4932 case -NFS4ERR_GRACE:
4933 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4934 case -NFS4ERR_RETRY_UNCACHED_REP:
4935 case -NFS4ERR_OLD_STATEID:
4936 goto restart_call;
4937 }
4938 task->tk_status = nfs4_map_errors(task->tk_status);
4939 return 0;
4940recovery_failed:
4941 task->tk_status = -EIO;
4942 return 0;
4943wait_on_recovery:
4944 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4945 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4946 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4947 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4948 goto recovery_failed;
4949restart_call:
4950 task->tk_status = 0;
4951 return -EAGAIN;
4952}
4953
4954static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4955 nfs4_verifier *bootverf)
4956{
4957 __be32 verf[2];
4958
4959 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4960 /* An impossible timestamp guarantees this value
4961 * will never match a generated boot time. */
4962 verf[0] = 0;
4963 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4964 } else {
4965 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4966 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4967 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4968 }
4969 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4970}
4971
4972static int
4973nfs4_init_nonuniform_client_string(struct nfs_client *clp)
4974{
4975 int result;
4976 size_t len;
4977 char *str;
4978 bool retried = false;
4979
4980 if (clp->cl_owner_id != NULL)
4981 return 0;
4982retry:
4983 rcu_read_lock();
4984 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4985 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4986 1 +
4987 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4988 1;
4989 rcu_read_unlock();
4990
4991 if (len > NFS4_OPAQUE_LIMIT + 1)
4992 return -EINVAL;
4993
4994 /*
4995 * Since this string is allocated at mount time, and held until the
4996 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4997 * about a memory-reclaim deadlock.
4998 */
4999 str = kmalloc(len, GFP_KERNEL);
5000 if (!str)
5001 return -ENOMEM;
5002
5003 rcu_read_lock();
5004 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5005 clp->cl_ipaddr,
5006 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5007 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5008 rcu_read_unlock();
5009
5010 /* Did something change? */
5011 if (result >= len) {
5012 kfree(str);
5013 if (retried)
5014 return -EINVAL;
5015 retried = true;
5016 goto retry;
5017 }
5018 clp->cl_owner_id = str;
5019 return 0;
5020}
5021
5022static int
5023nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5024{
5025 int result;
5026 size_t len;
5027 char *str;
5028
5029 len = 10 + 10 + 1 + 10 + 1 +
5030 strlen(nfs4_client_id_uniquifier) + 1 +
5031 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5032
5033 if (len > NFS4_OPAQUE_LIMIT + 1)
5034 return -EINVAL;
5035
5036 /*
5037 * Since this string is allocated at mount time, and held until the
5038 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5039 * about a memory-reclaim deadlock.
5040 */
5041 str = kmalloc(len, GFP_KERNEL);
5042 if (!str)
5043 return -ENOMEM;
5044
5045 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5046 clp->rpc_ops->version, clp->cl_minorversion,
5047 nfs4_client_id_uniquifier,
5048 clp->cl_rpcclient->cl_nodename);
5049 if (result >= len) {
5050 kfree(str);
5051 return -EINVAL;
5052 }
5053 clp->cl_owner_id = str;
5054 return 0;
5055}
5056
5057static int
5058nfs4_init_uniform_client_string(struct nfs_client *clp)
5059{
5060 int result;
5061 size_t len;
5062 char *str;
5063
5064 if (clp->cl_owner_id != NULL)
5065 return 0;
5066
5067 if (nfs4_client_id_uniquifier[0] != '\0')
5068 return nfs4_init_uniquifier_client_string(clp);
5069
5070 len = 10 + 10 + 1 + 10 + 1 +
5071 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5072
5073 if (len > NFS4_OPAQUE_LIMIT + 1)
5074 return -EINVAL;
5075
5076 /*
5077 * Since this string is allocated at mount time, and held until the
5078 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5079 * about a memory-reclaim deadlock.
5080 */
5081 str = kmalloc(len, GFP_KERNEL);
5082 if (!str)
5083 return -ENOMEM;
5084
5085 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5086 clp->rpc_ops->version, clp->cl_minorversion,
5087 clp->cl_rpcclient->cl_nodename);
5088 if (result >= len) {
5089 kfree(str);
5090 return -EINVAL;
5091 }
5092 clp->cl_owner_id = str;
5093 return 0;
5094}
5095
5096/*
5097 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5098 * services. Advertise one based on the address family of the
5099 * clientaddr.
5100 */
5101static unsigned int
5102nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5103{
5104 if (strchr(clp->cl_ipaddr, ':') != NULL)
5105 return scnprintf(buf, len, "tcp6");
5106 else
5107 return scnprintf(buf, len, "tcp");
5108}
5109
5110static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5111{
5112 struct nfs4_setclientid *sc = calldata;
5113
5114 if (task->tk_status == 0)
5115 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5116}
5117
5118static const struct rpc_call_ops nfs4_setclientid_ops = {
5119 .rpc_call_done = nfs4_setclientid_done,
5120};
5121
5122/**
5123 * nfs4_proc_setclientid - Negotiate client ID
5124 * @clp: state data structure
5125 * @program: RPC program for NFSv4 callback service
5126 * @port: IP port number for NFS4 callback service
5127 * @cred: RPC credential to use for this call
5128 * @res: where to place the result
5129 *
5130 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5131 */
5132int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5133 unsigned short port, struct rpc_cred *cred,
5134 struct nfs4_setclientid_res *res)
5135{
5136 nfs4_verifier sc_verifier;
5137 struct nfs4_setclientid setclientid = {
5138 .sc_verifier = &sc_verifier,
5139 .sc_prog = program,
5140 .sc_clnt = clp,
5141 };
5142 struct rpc_message msg = {
5143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5144 .rpc_argp = &setclientid,
5145 .rpc_resp = res,
5146 .rpc_cred = cred,
5147 };
5148 struct rpc_task *task;
5149 struct rpc_task_setup task_setup_data = {
5150 .rpc_client = clp->cl_rpcclient,
5151 .rpc_message = &msg,
5152 .callback_ops = &nfs4_setclientid_ops,
5153 .callback_data = &setclientid,
5154 .flags = RPC_TASK_TIMEOUT,
5155 };
5156 int status;
5157
5158 /* nfs_client_id4 */
5159 nfs4_init_boot_verifier(clp, &sc_verifier);
5160
5161 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5162 status = nfs4_init_uniform_client_string(clp);
5163 else
5164 status = nfs4_init_nonuniform_client_string(clp);
5165
5166 if (status)
5167 goto out;
5168
5169 /* cb_client4 */
5170 setclientid.sc_netid_len =
5171 nfs4_init_callback_netid(clp,
5172 setclientid.sc_netid,
5173 sizeof(setclientid.sc_netid));
5174 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5175 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5176 clp->cl_ipaddr, port >> 8, port & 255);
5177
5178 dprintk("NFS call setclientid auth=%s, '%s'\n",
5179 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5180 clp->cl_owner_id);
5181 task = rpc_run_task(&task_setup_data);
5182 if (IS_ERR(task)) {
5183 status = PTR_ERR(task);
5184 goto out;
5185 }
5186 status = task->tk_status;
5187 if (setclientid.sc_cred) {
5188 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5189 put_rpccred(setclientid.sc_cred);
5190 }
5191 rpc_put_task(task);
5192out:
5193 trace_nfs4_setclientid(clp, status);
5194 dprintk("NFS reply setclientid: %d\n", status);
5195 return status;
5196}
5197
5198/**
5199 * nfs4_proc_setclientid_confirm - Confirm client ID
5200 * @clp: state data structure
5201 * @res: result of a previous SETCLIENTID
5202 * @cred: RPC credential to use for this call
5203 *
5204 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5205 */
5206int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5207 struct nfs4_setclientid_res *arg,
5208 struct rpc_cred *cred)
5209{
5210 struct rpc_message msg = {
5211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5212 .rpc_argp = arg,
5213 .rpc_cred = cred,
5214 };
5215 int status;
5216
5217 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5218 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5219 clp->cl_clientid);
5220 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5221 trace_nfs4_setclientid_confirm(clp, status);
5222 dprintk("NFS reply setclientid_confirm: %d\n", status);
5223 return status;
5224}
5225
5226struct nfs4_delegreturndata {
5227 struct nfs4_delegreturnargs args;
5228 struct nfs4_delegreturnres res;
5229 struct nfs_fh fh;
5230 nfs4_stateid stateid;
5231 unsigned long timestamp;
5232 struct nfs_fattr fattr;
5233 int rpc_status;
5234 struct inode *inode;
5235 bool roc;
5236 u32 roc_barrier;
5237};
5238
5239static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5240{
5241 struct nfs4_delegreturndata *data = calldata;
5242
5243 if (!nfs4_sequence_done(task, &data->res.seq_res))
5244 return;
5245
5246 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5247 switch (task->tk_status) {
5248 case 0:
5249 renew_lease(data->res.server, data->timestamp);
5250 case -NFS4ERR_ADMIN_REVOKED:
5251 case -NFS4ERR_DELEG_REVOKED:
5252 case -NFS4ERR_BAD_STATEID:
5253 case -NFS4ERR_OLD_STATEID:
5254 case -NFS4ERR_STALE_STATEID:
5255 case -NFS4ERR_EXPIRED:
5256 task->tk_status = 0;
5257 if (data->roc)
5258 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5259 break;
5260 default:
5261 if (nfs4_async_handle_error(task, data->res.server,
5262 NULL, NULL) == -EAGAIN) {
5263 rpc_restart_call_prepare(task);
5264 return;
5265 }
5266 }
5267 data->rpc_status = task->tk_status;
5268}
5269
5270static void nfs4_delegreturn_release(void *calldata)
5271{
5272 struct nfs4_delegreturndata *data = calldata;
5273 struct inode *inode = data->inode;
5274
5275 if (inode) {
5276 if (data->roc)
5277 pnfs_roc_release(inode);
5278 nfs_iput_and_deactive(inode);
5279 }
5280 kfree(calldata);
5281}
5282
5283static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5284{
5285 struct nfs4_delegreturndata *d_data;
5286
5287 d_data = (struct nfs4_delegreturndata *)data;
5288
5289 if (d_data->roc)
5290 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5291
5292 nfs4_setup_sequence(d_data->res.server,
5293 &d_data->args.seq_args,
5294 &d_data->res.seq_res,
5295 task);
5296}
5297
5298static const struct rpc_call_ops nfs4_delegreturn_ops = {
5299 .rpc_call_prepare = nfs4_delegreturn_prepare,
5300 .rpc_call_done = nfs4_delegreturn_done,
5301 .rpc_release = nfs4_delegreturn_release,
5302};
5303
5304static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5305{
5306 struct nfs4_delegreturndata *data;
5307 struct nfs_server *server = NFS_SERVER(inode);
5308 struct rpc_task *task;
5309 struct rpc_message msg = {
5310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5311 .rpc_cred = cred,
5312 };
5313 struct rpc_task_setup task_setup_data = {
5314 .rpc_client = server->client,
5315 .rpc_message = &msg,
5316 .callback_ops = &nfs4_delegreturn_ops,
5317 .flags = RPC_TASK_ASYNC,
5318 };
5319 int status = 0;
5320
5321 data = kzalloc(sizeof(*data), GFP_NOFS);
5322 if (data == NULL)
5323 return -ENOMEM;
5324 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5325 data->args.fhandle = &data->fh;
5326 data->args.stateid = &data->stateid;
5327 data->args.bitmask = server->cache_consistency_bitmask;
5328 nfs_copy_fh(&data->fh, NFS_FH(inode));
5329 nfs4_stateid_copy(&data->stateid, stateid);
5330 data->res.fattr = &data->fattr;
5331 data->res.server = server;
5332 nfs_fattr_init(data->res.fattr);
5333 data->timestamp = jiffies;
5334 data->rpc_status = 0;
5335 data->inode = nfs_igrab_and_active(inode);
5336 if (data->inode)
5337 data->roc = nfs4_roc(inode);
5338
5339 task_setup_data.callback_data = data;
5340 msg.rpc_argp = &data->args;
5341 msg.rpc_resp = &data->res;
5342 task = rpc_run_task(&task_setup_data);
5343 if (IS_ERR(task))
5344 return PTR_ERR(task);
5345 if (!issync)
5346 goto out;
5347 status = nfs4_wait_for_completion_rpc_task(task);
5348 if (status != 0)
5349 goto out;
5350 status = data->rpc_status;
5351 if (status == 0)
5352 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5353 else
5354 nfs_refresh_inode(inode, &data->fattr);
5355out:
5356 rpc_put_task(task);
5357 return status;
5358}
5359
5360int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5361{
5362 struct nfs_server *server = NFS_SERVER(inode);
5363 struct nfs4_exception exception = { };
5364 int err;
5365 do {
5366 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5367 trace_nfs4_delegreturn(inode, err);
5368 switch (err) {
5369 case -NFS4ERR_STALE_STATEID:
5370 case -NFS4ERR_EXPIRED:
5371 case 0:
5372 return 0;
5373 }
5374 err = nfs4_handle_exception(server, err, &exception);
5375 } while (exception.retry);
5376 return err;
5377}
5378
5379#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5380#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5381
5382/*
5383 * sleep, with exponential backoff, and retry the LOCK operation.
5384 */
5385static unsigned long
5386nfs4_set_lock_task_retry(unsigned long timeout)
5387{
5388 freezable_schedule_timeout_killable_unsafe(timeout);
5389 timeout <<= 1;
5390 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5391 return NFS4_LOCK_MAXTIMEOUT;
5392 return timeout;
5393}
5394
5395static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5396{
5397 struct inode *inode = state->inode;
5398 struct nfs_server *server = NFS_SERVER(inode);
5399 struct nfs_client *clp = server->nfs_client;
5400 struct nfs_lockt_args arg = {
5401 .fh = NFS_FH(inode),
5402 .fl = request,
5403 };
5404 struct nfs_lockt_res res = {
5405 .denied = request,
5406 };
5407 struct rpc_message msg = {
5408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5409 .rpc_argp = &arg,
5410 .rpc_resp = &res,
5411 .rpc_cred = state->owner->so_cred,
5412 };
5413 struct nfs4_lock_state *lsp;
5414 int status;
5415
5416 arg.lock_owner.clientid = clp->cl_clientid;
5417 status = nfs4_set_lock_state(state, request);
5418 if (status != 0)
5419 goto out;
5420 lsp = request->fl_u.nfs4_fl.owner;
5421 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5422 arg.lock_owner.s_dev = server->s_dev;
5423 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5424 switch (status) {
5425 case 0:
5426 request->fl_type = F_UNLCK;
5427 break;
5428 case -NFS4ERR_DENIED:
5429 status = 0;
5430 }
5431 request->fl_ops->fl_release_private(request);
5432 request->fl_ops = NULL;
5433out:
5434 return status;
5435}
5436
5437static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5438{
5439 struct nfs4_exception exception = { };
5440 int err;
5441
5442 do {
5443 err = _nfs4_proc_getlk(state, cmd, request);
5444 trace_nfs4_get_lock(request, state, cmd, err);
5445 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5446 &exception);
5447 } while (exception.retry);
5448 return err;
5449}
5450
5451static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
5452{
5453 int res = 0;
5454 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5455 case FL_POSIX:
5456 res = posix_lock_inode_wait(inode, fl);
5457 break;
5458 case FL_FLOCK:
5459 res = flock_lock_inode_wait(inode, fl);
5460 break;
5461 default:
5462 BUG();
5463 }
5464 return res;
5465}
5466
5467struct nfs4_unlockdata {
5468 struct nfs_locku_args arg;
5469 struct nfs_locku_res res;
5470 struct nfs4_lock_state *lsp;
5471 struct nfs_open_context *ctx;
5472 struct file_lock fl;
5473 const struct nfs_server *server;
5474 unsigned long timestamp;
5475};
5476
5477static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5478 struct nfs_open_context *ctx,
5479 struct nfs4_lock_state *lsp,
5480 struct nfs_seqid *seqid)
5481{
5482 struct nfs4_unlockdata *p;
5483 struct inode *inode = lsp->ls_state->inode;
5484
5485 p = kzalloc(sizeof(*p), GFP_NOFS);
5486 if (p == NULL)
5487 return NULL;
5488 p->arg.fh = NFS_FH(inode);
5489 p->arg.fl = &p->fl;
5490 p->arg.seqid = seqid;
5491 p->res.seqid = seqid;
5492 p->lsp = lsp;
5493 atomic_inc(&lsp->ls_count);
5494 /* Ensure we don't close file until we're done freeing locks! */
5495 p->ctx = get_nfs_open_context(ctx);
5496 memcpy(&p->fl, fl, sizeof(p->fl));
5497 p->server = NFS_SERVER(inode);
5498 return p;
5499}
5500
5501static void nfs4_locku_release_calldata(void *data)
5502{
5503 struct nfs4_unlockdata *calldata = data;
5504 nfs_free_seqid(calldata->arg.seqid);
5505 nfs4_put_lock_state(calldata->lsp);
5506 put_nfs_open_context(calldata->ctx);
5507 kfree(calldata);
5508}
5509
5510static void nfs4_locku_done(struct rpc_task *task, void *data)
5511{
5512 struct nfs4_unlockdata *calldata = data;
5513
5514 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5515 return;
5516 switch (task->tk_status) {
5517 case 0:
5518 renew_lease(calldata->server, calldata->timestamp);
5519 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
5520 if (nfs4_update_lock_stateid(calldata->lsp,
5521 &calldata->res.stateid))
5522 break;
5523 case -NFS4ERR_BAD_STATEID:
5524 case -NFS4ERR_OLD_STATEID:
5525 case -NFS4ERR_STALE_STATEID:
5526 case -NFS4ERR_EXPIRED:
5527 if (!nfs4_stateid_match(&calldata->arg.stateid,
5528 &calldata->lsp->ls_stateid))
5529 rpc_restart_call_prepare(task);
5530 break;
5531 default:
5532 if (nfs4_async_handle_error(task, calldata->server,
5533 NULL, NULL) == -EAGAIN)
5534 rpc_restart_call_prepare(task);
5535 }
5536 nfs_release_seqid(calldata->arg.seqid);
5537}
5538
5539static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5540{
5541 struct nfs4_unlockdata *calldata = data;
5542
5543 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5544 goto out_wait;
5545 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5546 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5547 /* Note: exit _without_ running nfs4_locku_done */
5548 goto out_no_action;
5549 }
5550 calldata->timestamp = jiffies;
5551 if (nfs4_setup_sequence(calldata->server,
5552 &calldata->arg.seq_args,
5553 &calldata->res.seq_res,
5554 task) != 0)
5555 nfs_release_seqid(calldata->arg.seqid);
5556 return;
5557out_no_action:
5558 task->tk_action = NULL;
5559out_wait:
5560 nfs4_sequence_done(task, &calldata->res.seq_res);
5561}
5562
5563static const struct rpc_call_ops nfs4_locku_ops = {
5564 .rpc_call_prepare = nfs4_locku_prepare,
5565 .rpc_call_done = nfs4_locku_done,
5566 .rpc_release = nfs4_locku_release_calldata,
5567};
5568
5569static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5570 struct nfs_open_context *ctx,
5571 struct nfs4_lock_state *lsp,
5572 struct nfs_seqid *seqid)
5573{
5574 struct nfs4_unlockdata *data;
5575 struct rpc_message msg = {
5576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5577 .rpc_cred = ctx->cred,
5578 };
5579 struct rpc_task_setup task_setup_data = {
5580 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5581 .rpc_message = &msg,
5582 .callback_ops = &nfs4_locku_ops,
5583 .workqueue = nfsiod_workqueue,
5584 .flags = RPC_TASK_ASYNC,
5585 };
5586
5587 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5588 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5589
5590 /* Ensure this is an unlock - when canceling a lock, the
5591 * canceled lock is passed in, and it won't be an unlock.
5592 */
5593 fl->fl_type = F_UNLCK;
5594
5595 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5596 if (data == NULL) {
5597 nfs_free_seqid(seqid);
5598 return ERR_PTR(-ENOMEM);
5599 }
5600
5601 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5602 msg.rpc_argp = &data->arg;
5603 msg.rpc_resp = &data->res;
5604 task_setup_data.callback_data = data;
5605 return rpc_run_task(&task_setup_data);
5606}
5607
5608static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5609{
5610 struct inode *inode = state->inode;
5611 struct nfs4_state_owner *sp = state->owner;
5612 struct nfs_inode *nfsi = NFS_I(inode);
5613 struct nfs_seqid *seqid;
5614 struct nfs4_lock_state *lsp;
5615 struct rpc_task *task;
5616 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5617 int status = 0;
5618 unsigned char fl_flags = request->fl_flags;
5619
5620 status = nfs4_set_lock_state(state, request);
5621 /* Unlock _before_ we do the RPC call */
5622 request->fl_flags |= FL_EXISTS;
5623 /* Exclude nfs_delegation_claim_locks() */
5624 mutex_lock(&sp->so_delegreturn_mutex);
5625 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5626 down_read(&nfsi->rwsem);
5627 if (do_vfs_lock(inode, request) == -ENOENT) {
5628 up_read(&nfsi->rwsem);
5629 mutex_unlock(&sp->so_delegreturn_mutex);
5630 goto out;
5631 }
5632 up_read(&nfsi->rwsem);
5633 mutex_unlock(&sp->so_delegreturn_mutex);
5634 if (status != 0)
5635 goto out;
5636 /* Is this a delegated lock? */
5637 lsp = request->fl_u.nfs4_fl.owner;
5638 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5639 goto out;
5640 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5641 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5642 status = -ENOMEM;
5643 if (IS_ERR(seqid))
5644 goto out;
5645 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5646 status = PTR_ERR(task);
5647 if (IS_ERR(task))
5648 goto out;
5649 status = nfs4_wait_for_completion_rpc_task(task);
5650 rpc_put_task(task);
5651out:
5652 request->fl_flags = fl_flags;
5653 trace_nfs4_unlock(request, state, F_SETLK, status);
5654 return status;
5655}
5656
5657struct nfs4_lockdata {
5658 struct nfs_lock_args arg;
5659 struct nfs_lock_res res;
5660 struct nfs4_lock_state *lsp;
5661 struct nfs_open_context *ctx;
5662 struct file_lock fl;
5663 unsigned long timestamp;
5664 int rpc_status;
5665 int cancelled;
5666 struct nfs_server *server;
5667};
5668
5669static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5670 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5671 gfp_t gfp_mask)
5672{
5673 struct nfs4_lockdata *p;
5674 struct inode *inode = lsp->ls_state->inode;
5675 struct nfs_server *server = NFS_SERVER(inode);
5676 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5677
5678 p = kzalloc(sizeof(*p), gfp_mask);
5679 if (p == NULL)
5680 return NULL;
5681
5682 p->arg.fh = NFS_FH(inode);
5683 p->arg.fl = &p->fl;
5684 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5685 if (IS_ERR(p->arg.open_seqid))
5686 goto out_free;
5687 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5688 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5689 if (IS_ERR(p->arg.lock_seqid))
5690 goto out_free_seqid;
5691 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5692 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5693 p->arg.lock_owner.s_dev = server->s_dev;
5694 p->res.lock_seqid = p->arg.lock_seqid;
5695 p->lsp = lsp;
5696 p->server = server;
5697 atomic_inc(&lsp->ls_count);
5698 p->ctx = get_nfs_open_context(ctx);
5699 get_file(fl->fl_file);
5700 memcpy(&p->fl, fl, sizeof(p->fl));
5701 return p;
5702out_free_seqid:
5703 nfs_free_seqid(p->arg.open_seqid);
5704out_free:
5705 kfree(p);
5706 return NULL;
5707}
5708
5709static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5710{
5711 struct nfs4_lockdata *data = calldata;
5712 struct nfs4_state *state = data->lsp->ls_state;
5713
5714 dprintk("%s: begin!\n", __func__);
5715 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5716 goto out_wait;
5717 /* Do we need to do an open_to_lock_owner? */
5718 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5719 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5720 goto out_release_lock_seqid;
5721 }
5722 nfs4_stateid_copy(&data->arg.open_stateid,
5723 &state->open_stateid);
5724 data->arg.new_lock_owner = 1;
5725 data->res.open_seqid = data->arg.open_seqid;
5726 } else {
5727 data->arg.new_lock_owner = 0;
5728 nfs4_stateid_copy(&data->arg.lock_stateid,
5729 &data->lsp->ls_stateid);
5730 }
5731 if (!nfs4_valid_open_stateid(state)) {
5732 data->rpc_status = -EBADF;
5733 task->tk_action = NULL;
5734 goto out_release_open_seqid;
5735 }
5736 data->timestamp = jiffies;
5737 if (nfs4_setup_sequence(data->server,
5738 &data->arg.seq_args,
5739 &data->res.seq_res,
5740 task) == 0)
5741 return;
5742out_release_open_seqid:
5743 nfs_release_seqid(data->arg.open_seqid);
5744out_release_lock_seqid:
5745 nfs_release_seqid(data->arg.lock_seqid);
5746out_wait:
5747 nfs4_sequence_done(task, &data->res.seq_res);
5748 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5749}
5750
5751static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5752{
5753 struct nfs4_lockdata *data = calldata;
5754 struct nfs4_lock_state *lsp = data->lsp;
5755
5756 dprintk("%s: begin!\n", __func__);
5757
5758 if (!nfs4_sequence_done(task, &data->res.seq_res))
5759 return;
5760
5761 data->rpc_status = task->tk_status;
5762 switch (task->tk_status) {
5763 case 0:
5764 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
5765 data->timestamp);
5766 if (data->arg.new_lock) {
5767 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5768 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
5769 rpc_restart_call_prepare(task);
5770 break;
5771 }
5772 }
5773 if (data->arg.new_lock_owner != 0) {
5774 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5775 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5776 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5777 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5778 rpc_restart_call_prepare(task);
5779 break;
5780 case -NFS4ERR_BAD_STATEID:
5781 case -NFS4ERR_OLD_STATEID:
5782 case -NFS4ERR_STALE_STATEID:
5783 case -NFS4ERR_EXPIRED:
5784 if (data->arg.new_lock_owner != 0) {
5785 if (!nfs4_stateid_match(&data->arg.open_stateid,
5786 &lsp->ls_state->open_stateid))
5787 rpc_restart_call_prepare(task);
5788 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5789 &lsp->ls_stateid))
5790 rpc_restart_call_prepare(task);
5791 }
5792 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5793}
5794
5795static void nfs4_lock_release(void *calldata)
5796{
5797 struct nfs4_lockdata *data = calldata;
5798
5799 dprintk("%s: begin!\n", __func__);
5800 nfs_free_seqid(data->arg.open_seqid);
5801 if (data->cancelled != 0) {
5802 struct rpc_task *task;
5803 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5804 data->arg.lock_seqid);
5805 if (!IS_ERR(task))
5806 rpc_put_task_async(task);
5807 dprintk("%s: cancelling lock!\n", __func__);
5808 } else
5809 nfs_free_seqid(data->arg.lock_seqid);
5810 nfs4_put_lock_state(data->lsp);
5811 put_nfs_open_context(data->ctx);
5812 fput(data->fl.fl_file);
5813 kfree(data);
5814 dprintk("%s: done!\n", __func__);
5815}
5816
5817static const struct rpc_call_ops nfs4_lock_ops = {
5818 .rpc_call_prepare = nfs4_lock_prepare,
5819 .rpc_call_done = nfs4_lock_done,
5820 .rpc_release = nfs4_lock_release,
5821};
5822
5823static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5824{
5825 switch (error) {
5826 case -NFS4ERR_ADMIN_REVOKED:
5827 case -NFS4ERR_BAD_STATEID:
5828 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5829 if (new_lock_owner != 0 ||
5830 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5831 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5832 break;
5833 case -NFS4ERR_STALE_STATEID:
5834 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5835 case -NFS4ERR_EXPIRED:
5836 nfs4_schedule_lease_recovery(server->nfs_client);
5837 };
5838}
5839
5840static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5841{
5842 struct nfs4_lockdata *data;
5843 struct rpc_task *task;
5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5846 .rpc_cred = state->owner->so_cred,
5847 };
5848 struct rpc_task_setup task_setup_data = {
5849 .rpc_client = NFS_CLIENT(state->inode),
5850 .rpc_message = &msg,
5851 .callback_ops = &nfs4_lock_ops,
5852 .workqueue = nfsiod_workqueue,
5853 .flags = RPC_TASK_ASYNC,
5854 };
5855 int ret;
5856
5857 dprintk("%s: begin!\n", __func__);
5858 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5859 fl->fl_u.nfs4_fl.owner,
5860 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5861 if (data == NULL)
5862 return -ENOMEM;
5863 if (IS_SETLKW(cmd))
5864 data->arg.block = 1;
5865 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5866 msg.rpc_argp = &data->arg;
5867 msg.rpc_resp = &data->res;
5868 task_setup_data.callback_data = data;
5869 if (recovery_type > NFS_LOCK_NEW) {
5870 if (recovery_type == NFS_LOCK_RECLAIM)
5871 data->arg.reclaim = NFS_LOCK_RECLAIM;
5872 nfs4_set_sequence_privileged(&data->arg.seq_args);
5873 } else
5874 data->arg.new_lock = 1;
5875 task = rpc_run_task(&task_setup_data);
5876 if (IS_ERR(task))
5877 return PTR_ERR(task);
5878 ret = nfs4_wait_for_completion_rpc_task(task);
5879 if (ret == 0) {
5880 ret = data->rpc_status;
5881 if (ret)
5882 nfs4_handle_setlk_error(data->server, data->lsp,
5883 data->arg.new_lock_owner, ret);
5884 } else
5885 data->cancelled = 1;
5886 rpc_put_task(task);
5887 dprintk("%s: done, ret = %d!\n", __func__, ret);
5888 return ret;
5889}
5890
5891static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5892{
5893 struct nfs_server *server = NFS_SERVER(state->inode);
5894 struct nfs4_exception exception = {
5895 .inode = state->inode,
5896 };
5897 int err;
5898
5899 do {
5900 /* Cache the lock if possible... */
5901 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5902 return 0;
5903 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5904 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5905 if (err != -NFS4ERR_DELAY)
5906 break;
5907 nfs4_handle_exception(server, err, &exception);
5908 } while (exception.retry);
5909 return err;
5910}
5911
5912static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5913{
5914 struct nfs_server *server = NFS_SERVER(state->inode);
5915 struct nfs4_exception exception = {
5916 .inode = state->inode,
5917 };
5918 int err;
5919
5920 err = nfs4_set_lock_state(state, request);
5921 if (err != 0)
5922 return err;
5923 if (!recover_lost_locks) {
5924 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5925 return 0;
5926 }
5927 do {
5928 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5929 return 0;
5930 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5931 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5932 switch (err) {
5933 default:
5934 goto out;
5935 case -NFS4ERR_GRACE:
5936 case -NFS4ERR_DELAY:
5937 nfs4_handle_exception(server, err, &exception);
5938 err = 0;
5939 }
5940 } while (exception.retry);
5941out:
5942 return err;
5943}
5944
5945#if defined(CONFIG_NFS_V4_1)
5946/**
5947 * nfs41_check_expired_locks - possibly free a lock stateid
5948 *
5949 * @state: NFSv4 state for an inode
5950 *
5951 * Returns NFS_OK if recovery for this stateid is now finished.
5952 * Otherwise a negative NFS4ERR value is returned.
5953 */
5954static int nfs41_check_expired_locks(struct nfs4_state *state)
5955{
5956 int status, ret = -NFS4ERR_BAD_STATEID;
5957 struct nfs4_lock_state *lsp;
5958 struct nfs_server *server = NFS_SERVER(state->inode);
5959
5960 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5961 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5962 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5963
5964 status = nfs41_test_stateid(server,
5965 &lsp->ls_stateid,
5966 cred);
5967 trace_nfs4_test_lock_stateid(state, lsp, status);
5968 if (status != NFS_OK) {
5969 /* Free the stateid unless the server
5970 * informs us the stateid is unrecognized. */
5971 if (status != -NFS4ERR_BAD_STATEID)
5972 nfs41_free_stateid(server,
5973 &lsp->ls_stateid,
5974 cred);
5975 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5976 ret = status;
5977 }
5978 }
5979 };
5980
5981 return ret;
5982}
5983
5984static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5985{
5986 int status = NFS_OK;
5987
5988 if (test_bit(LK_STATE_IN_USE, &state->flags))
5989 status = nfs41_check_expired_locks(state);
5990 if (status != NFS_OK)
5991 status = nfs4_lock_expired(state, request);
5992 return status;
5993}
5994#endif
5995
5996static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5997{
5998 struct nfs_inode *nfsi = NFS_I(state->inode);
5999 unsigned char fl_flags = request->fl_flags;
6000 int status = -ENOLCK;
6001
6002 if ((fl_flags & FL_POSIX) &&
6003 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6004 goto out;
6005 /* Is this a delegated open? */
6006 status = nfs4_set_lock_state(state, request);
6007 if (status != 0)
6008 goto out;
6009 request->fl_flags |= FL_ACCESS;
6010 status = do_vfs_lock(state->inode, request);
6011 if (status < 0)
6012 goto out;
6013 down_read(&nfsi->rwsem);
6014 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6015 /* Yes: cache locks! */
6016 /* ...but avoid races with delegation recall... */
6017 request->fl_flags = fl_flags & ~FL_SLEEP;
6018 status = do_vfs_lock(state->inode, request);
6019 up_read(&nfsi->rwsem);
6020 goto out;
6021 }
6022 up_read(&nfsi->rwsem);
6023 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6024out:
6025 request->fl_flags = fl_flags;
6026 return status;
6027}
6028
6029static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6030{
6031 struct nfs4_exception exception = {
6032 .state = state,
6033 .inode = state->inode,
6034 };
6035 int err;
6036
6037 do {
6038 err = _nfs4_proc_setlk(state, cmd, request);
6039 trace_nfs4_set_lock(request, state, cmd, err);
6040 if (err == -NFS4ERR_DENIED)
6041 err = -EAGAIN;
6042 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6043 err, &exception);
6044 } while (exception.retry);
6045 return err;
6046}
6047
6048static int
6049nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6050{
6051 struct nfs_open_context *ctx;
6052 struct nfs4_state *state;
6053 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6054 int status;
6055
6056 /* verify open state */
6057 ctx = nfs_file_open_context(filp);
6058 state = ctx->state;
6059
6060 if (request->fl_start < 0 || request->fl_end < 0)
6061 return -EINVAL;
6062
6063 if (IS_GETLK(cmd)) {
6064 if (state != NULL)
6065 return nfs4_proc_getlk(state, F_GETLK, request);
6066 return 0;
6067 }
6068
6069 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6070 return -EINVAL;
6071
6072 if (request->fl_type == F_UNLCK) {
6073 if (state != NULL)
6074 return nfs4_proc_unlck(state, cmd, request);
6075 return 0;
6076 }
6077
6078 if (state == NULL)
6079 return -ENOLCK;
6080 /*
6081 * Don't rely on the VFS having checked the file open mode,
6082 * since it won't do this for flock() locks.
6083 */
6084 switch (request->fl_type) {
6085 case F_RDLCK:
6086 if (!(filp->f_mode & FMODE_READ))
6087 return -EBADF;
6088 break;
6089 case F_WRLCK:
6090 if (!(filp->f_mode & FMODE_WRITE))
6091 return -EBADF;
6092 }
6093
6094 do {
6095 status = nfs4_proc_setlk(state, cmd, request);
6096 if ((status != -EAGAIN) || IS_SETLK(cmd))
6097 break;
6098 timeout = nfs4_set_lock_task_retry(timeout);
6099 status = -ERESTARTSYS;
6100 if (signalled())
6101 break;
6102 } while(status < 0);
6103 return status;
6104}
6105
6106int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6107{
6108 struct nfs_server *server = NFS_SERVER(state->inode);
6109 int err;
6110
6111 err = nfs4_set_lock_state(state, fl);
6112 if (err != 0)
6113 return err;
6114 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6115 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6116}
6117
6118struct nfs_release_lockowner_data {
6119 struct nfs4_lock_state *lsp;
6120 struct nfs_server *server;
6121 struct nfs_release_lockowner_args args;
6122 struct nfs_release_lockowner_res res;
6123 unsigned long timestamp;
6124};
6125
6126static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6127{
6128 struct nfs_release_lockowner_data *data = calldata;
6129 struct nfs_server *server = data->server;
6130 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6131 &data->args.seq_args, &data->res.seq_res, task);
6132 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6133 data->timestamp = jiffies;
6134}
6135
6136static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6137{
6138 struct nfs_release_lockowner_data *data = calldata;
6139 struct nfs_server *server = data->server;
6140
6141 nfs40_sequence_done(task, &data->res.seq_res);
6142
6143 switch (task->tk_status) {
6144 case 0:
6145 renew_lease(server, data->timestamp);
6146 break;
6147 case -NFS4ERR_STALE_CLIENTID:
6148 case -NFS4ERR_EXPIRED:
6149 nfs4_schedule_lease_recovery(server->nfs_client);
6150 break;
6151 case -NFS4ERR_LEASE_MOVED:
6152 case -NFS4ERR_DELAY:
6153 if (nfs4_async_handle_error(task, server,
6154 NULL, NULL) == -EAGAIN)
6155 rpc_restart_call_prepare(task);
6156 }
6157}
6158
6159static void nfs4_release_lockowner_release(void *calldata)
6160{
6161 struct nfs_release_lockowner_data *data = calldata;
6162 nfs4_free_lock_state(data->server, data->lsp);
6163 kfree(calldata);
6164}
6165
6166static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6167 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6168 .rpc_call_done = nfs4_release_lockowner_done,
6169 .rpc_release = nfs4_release_lockowner_release,
6170};
6171
6172static void
6173nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6174{
6175 struct nfs_release_lockowner_data *data;
6176 struct rpc_message msg = {
6177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6178 };
6179
6180 if (server->nfs_client->cl_mvops->minor_version != 0)
6181 return;
6182
6183 data = kmalloc(sizeof(*data), GFP_NOFS);
6184 if (!data)
6185 return;
6186 data->lsp = lsp;
6187 data->server = server;
6188 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6189 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6190 data->args.lock_owner.s_dev = server->s_dev;
6191
6192 msg.rpc_argp = &data->args;
6193 msg.rpc_resp = &data->res;
6194 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6195 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6196}
6197
6198#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6199
6200static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6201 const void *buf, size_t buflen,
6202 int flags, int type)
6203{
6204 if (strcmp(key, "") != 0)
6205 return -EINVAL;
6206
6207 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6208}
6209
6210static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6211 void *buf, size_t buflen, int type)
6212{
6213 if (strcmp(key, "") != 0)
6214 return -EINVAL;
6215
6216 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6217}
6218
6219static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6220 size_t list_len, const char *name,
6221 size_t name_len, int type)
6222{
6223 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6224
6225 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
6226 return 0;
6227
6228 if (list && len <= list_len)
6229 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6230 return len;
6231}
6232
6233#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6234static inline int nfs4_server_supports_labels(struct nfs_server *server)
6235{
6236 return server->caps & NFS_CAP_SECURITY_LABEL;
6237}
6238
6239static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6240 const void *buf, size_t buflen,
6241 int flags, int type)
6242{
6243 if (security_ismaclabel(key))
6244 return nfs4_set_security_label(dentry, buf, buflen);
6245
6246 return -EOPNOTSUPP;
6247}
6248
6249static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6250 void *buf, size_t buflen, int type)
6251{
6252 if (security_ismaclabel(key))
6253 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
6254 return -EOPNOTSUPP;
6255}
6256
6257static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6258 size_t list_len, const char *name,
6259 size_t name_len, int type)
6260{
6261 size_t len = 0;
6262
6263 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6264 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
6265 if (list && len <= list_len)
6266 security_inode_listsecurity(d_inode(dentry), list, len);
6267 }
6268 return len;
6269}
6270
6271static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6272 .prefix = XATTR_SECURITY_PREFIX,
6273 .list = nfs4_xattr_list_nfs4_label,
6274 .get = nfs4_xattr_get_nfs4_label,
6275 .set = nfs4_xattr_set_nfs4_label,
6276};
6277#endif
6278
6279
6280/*
6281 * nfs_fhget will use either the mounted_on_fileid or the fileid
6282 */
6283static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6284{
6285 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6286 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6287 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6288 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6289 return;
6290
6291 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6292 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6293 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6294 fattr->nlink = 2;
6295}
6296
6297static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6298 const struct qstr *name,
6299 struct nfs4_fs_locations *fs_locations,
6300 struct page *page)
6301{
6302 struct nfs_server *server = NFS_SERVER(dir);
6303 u32 bitmask[3] = {
6304 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6305 };
6306 struct nfs4_fs_locations_arg args = {
6307 .dir_fh = NFS_FH(dir),
6308 .name = name,
6309 .page = page,
6310 .bitmask = bitmask,
6311 };
6312 struct nfs4_fs_locations_res res = {
6313 .fs_locations = fs_locations,
6314 };
6315 struct rpc_message msg = {
6316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6317 .rpc_argp = &args,
6318 .rpc_resp = &res,
6319 };
6320 int status;
6321
6322 dprintk("%s: start\n", __func__);
6323
6324 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6325 * is not supported */
6326 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6327 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6328 else
6329 bitmask[0] |= FATTR4_WORD0_FILEID;
6330
6331 nfs_fattr_init(&fs_locations->fattr);
6332 fs_locations->server = server;
6333 fs_locations->nlocations = 0;
6334 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6335 dprintk("%s: returned status = %d\n", __func__, status);
6336 return status;
6337}
6338
6339int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6340 const struct qstr *name,
6341 struct nfs4_fs_locations *fs_locations,
6342 struct page *page)
6343{
6344 struct nfs4_exception exception = { };
6345 int err;
6346 do {
6347 err = _nfs4_proc_fs_locations(client, dir, name,
6348 fs_locations, page);
6349 trace_nfs4_get_fs_locations(dir, name, err);
6350 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6351 &exception);
6352 } while (exception.retry);
6353 return err;
6354}
6355
6356/*
6357 * This operation also signals the server that this client is
6358 * performing migration recovery. The server can stop returning
6359 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6360 * appended to this compound to identify the client ID which is
6361 * performing recovery.
6362 */
6363static int _nfs40_proc_get_locations(struct inode *inode,
6364 struct nfs4_fs_locations *locations,
6365 struct page *page, struct rpc_cred *cred)
6366{
6367 struct nfs_server *server = NFS_SERVER(inode);
6368 struct rpc_clnt *clnt = server->client;
6369 u32 bitmask[2] = {
6370 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6371 };
6372 struct nfs4_fs_locations_arg args = {
6373 .clientid = server->nfs_client->cl_clientid,
6374 .fh = NFS_FH(inode),
6375 .page = page,
6376 .bitmask = bitmask,
6377 .migration = 1, /* skip LOOKUP */
6378 .renew = 1, /* append RENEW */
6379 };
6380 struct nfs4_fs_locations_res res = {
6381 .fs_locations = locations,
6382 .migration = 1,
6383 .renew = 1,
6384 };
6385 struct rpc_message msg = {
6386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6387 .rpc_argp = &args,
6388 .rpc_resp = &res,
6389 .rpc_cred = cred,
6390 };
6391 unsigned long now = jiffies;
6392 int status;
6393
6394 nfs_fattr_init(&locations->fattr);
6395 locations->server = server;
6396 locations->nlocations = 0;
6397
6398 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6399 nfs4_set_sequence_privileged(&args.seq_args);
6400 status = nfs4_call_sync_sequence(clnt, server, &msg,
6401 &args.seq_args, &res.seq_res);
6402 if (status)
6403 return status;
6404
6405 renew_lease(server, now);
6406 return 0;
6407}
6408
6409#ifdef CONFIG_NFS_V4_1
6410
6411/*
6412 * This operation also signals the server that this client is
6413 * performing migration recovery. The server can stop asserting
6414 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6415 * performing this operation is identified in the SEQUENCE
6416 * operation in this compound.
6417 *
6418 * When the client supports GETATTR(fs_locations_info), it can
6419 * be plumbed in here.
6420 */
6421static int _nfs41_proc_get_locations(struct inode *inode,
6422 struct nfs4_fs_locations *locations,
6423 struct page *page, struct rpc_cred *cred)
6424{
6425 struct nfs_server *server = NFS_SERVER(inode);
6426 struct rpc_clnt *clnt = server->client;
6427 u32 bitmask[2] = {
6428 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6429 };
6430 struct nfs4_fs_locations_arg args = {
6431 .fh = NFS_FH(inode),
6432 .page = page,
6433 .bitmask = bitmask,
6434 .migration = 1, /* skip LOOKUP */
6435 };
6436 struct nfs4_fs_locations_res res = {
6437 .fs_locations = locations,
6438 .migration = 1,
6439 };
6440 struct rpc_message msg = {
6441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6442 .rpc_argp = &args,
6443 .rpc_resp = &res,
6444 .rpc_cred = cred,
6445 };
6446 int status;
6447
6448 nfs_fattr_init(&locations->fattr);
6449 locations->server = server;
6450 locations->nlocations = 0;
6451
6452 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6453 nfs4_set_sequence_privileged(&args.seq_args);
6454 status = nfs4_call_sync_sequence(clnt, server, &msg,
6455 &args.seq_args, &res.seq_res);
6456 if (status == NFS4_OK &&
6457 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6458 status = -NFS4ERR_LEASE_MOVED;
6459 return status;
6460}
6461
6462#endif /* CONFIG_NFS_V4_1 */
6463
6464/**
6465 * nfs4_proc_get_locations - discover locations for a migrated FSID
6466 * @inode: inode on FSID that is migrating
6467 * @locations: result of query
6468 * @page: buffer
6469 * @cred: credential to use for this operation
6470 *
6471 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6472 * operation failed, or a negative errno if a local error occurred.
6473 *
6474 * On success, "locations" is filled in, but if the server has
6475 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6476 * asserted.
6477 *
6478 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6479 * from this client that require migration recovery.
6480 */
6481int nfs4_proc_get_locations(struct inode *inode,
6482 struct nfs4_fs_locations *locations,
6483 struct page *page, struct rpc_cred *cred)
6484{
6485 struct nfs_server *server = NFS_SERVER(inode);
6486 struct nfs_client *clp = server->nfs_client;
6487 const struct nfs4_mig_recovery_ops *ops =
6488 clp->cl_mvops->mig_recovery_ops;
6489 struct nfs4_exception exception = { };
6490 int status;
6491
6492 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6493 (unsigned long long)server->fsid.major,
6494 (unsigned long long)server->fsid.minor,
6495 clp->cl_hostname);
6496 nfs_display_fhandle(NFS_FH(inode), __func__);
6497
6498 do {
6499 status = ops->get_locations(inode, locations, page, cred);
6500 if (status != -NFS4ERR_DELAY)
6501 break;
6502 nfs4_handle_exception(server, status, &exception);
6503 } while (exception.retry);
6504 return status;
6505}
6506
6507/*
6508 * This operation also signals the server that this client is
6509 * performing "lease moved" recovery. The server can stop
6510 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6511 * is appended to this compound to identify the client ID which is
6512 * performing recovery.
6513 */
6514static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6515{
6516 struct nfs_server *server = NFS_SERVER(inode);
6517 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6518 struct rpc_clnt *clnt = server->client;
6519 struct nfs4_fsid_present_arg args = {
6520 .fh = NFS_FH(inode),
6521 .clientid = clp->cl_clientid,
6522 .renew = 1, /* append RENEW */
6523 };
6524 struct nfs4_fsid_present_res res = {
6525 .renew = 1,
6526 };
6527 struct rpc_message msg = {
6528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6529 .rpc_argp = &args,
6530 .rpc_resp = &res,
6531 .rpc_cred = cred,
6532 };
6533 unsigned long now = jiffies;
6534 int status;
6535
6536 res.fh = nfs_alloc_fhandle();
6537 if (res.fh == NULL)
6538 return -ENOMEM;
6539
6540 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6541 nfs4_set_sequence_privileged(&args.seq_args);
6542 status = nfs4_call_sync_sequence(clnt, server, &msg,
6543 &args.seq_args, &res.seq_res);
6544 nfs_free_fhandle(res.fh);
6545 if (status)
6546 return status;
6547
6548 do_renew_lease(clp, now);
6549 return 0;
6550}
6551
6552#ifdef CONFIG_NFS_V4_1
6553
6554/*
6555 * This operation also signals the server that this client is
6556 * performing "lease moved" recovery. The server can stop asserting
6557 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6558 * this operation is identified in the SEQUENCE operation in this
6559 * compound.
6560 */
6561static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6562{
6563 struct nfs_server *server = NFS_SERVER(inode);
6564 struct rpc_clnt *clnt = server->client;
6565 struct nfs4_fsid_present_arg args = {
6566 .fh = NFS_FH(inode),
6567 };
6568 struct nfs4_fsid_present_res res = {
6569 };
6570 struct rpc_message msg = {
6571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6572 .rpc_argp = &args,
6573 .rpc_resp = &res,
6574 .rpc_cred = cred,
6575 };
6576 int status;
6577
6578 res.fh = nfs_alloc_fhandle();
6579 if (res.fh == NULL)
6580 return -ENOMEM;
6581
6582 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6583 nfs4_set_sequence_privileged(&args.seq_args);
6584 status = nfs4_call_sync_sequence(clnt, server, &msg,
6585 &args.seq_args, &res.seq_res);
6586 nfs_free_fhandle(res.fh);
6587 if (status == NFS4_OK &&
6588 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6589 status = -NFS4ERR_LEASE_MOVED;
6590 return status;
6591}
6592
6593#endif /* CONFIG_NFS_V4_1 */
6594
6595/**
6596 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6597 * @inode: inode on FSID to check
6598 * @cred: credential to use for this operation
6599 *
6600 * Server indicates whether the FSID is present, moved, or not
6601 * recognized. This operation is necessary to clear a LEASE_MOVED
6602 * condition for this client ID.
6603 *
6604 * Returns NFS4_OK if the FSID is present on this server,
6605 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6606 * NFS4ERR code if some error occurred on the server, or a
6607 * negative errno if a local failure occurred.
6608 */
6609int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6610{
6611 struct nfs_server *server = NFS_SERVER(inode);
6612 struct nfs_client *clp = server->nfs_client;
6613 const struct nfs4_mig_recovery_ops *ops =
6614 clp->cl_mvops->mig_recovery_ops;
6615 struct nfs4_exception exception = { };
6616 int status;
6617
6618 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6619 (unsigned long long)server->fsid.major,
6620 (unsigned long long)server->fsid.minor,
6621 clp->cl_hostname);
6622 nfs_display_fhandle(NFS_FH(inode), __func__);
6623
6624 do {
6625 status = ops->fsid_present(inode, cred);
6626 if (status != -NFS4ERR_DELAY)
6627 break;
6628 nfs4_handle_exception(server, status, &exception);
6629 } while (exception.retry);
6630 return status;
6631}
6632
6633/**
6634 * If 'use_integrity' is true and the state managment nfs_client
6635 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6636 * and the machine credential as per RFC3530bis and RFC5661 Security
6637 * Considerations sections. Otherwise, just use the user cred with the
6638 * filesystem's rpc_client.
6639 */
6640static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6641{
6642 int status;
6643 struct nfs4_secinfo_arg args = {
6644 .dir_fh = NFS_FH(dir),
6645 .name = name,
6646 };
6647 struct nfs4_secinfo_res res = {
6648 .flavors = flavors,
6649 };
6650 struct rpc_message msg = {
6651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6652 .rpc_argp = &args,
6653 .rpc_resp = &res,
6654 };
6655 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6656 struct rpc_cred *cred = NULL;
6657
6658 if (use_integrity) {
6659 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6660 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6661 msg.rpc_cred = cred;
6662 }
6663
6664 dprintk("NFS call secinfo %s\n", name->name);
6665
6666 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6667 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6668
6669 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6670 &res.seq_res, 0);
6671 dprintk("NFS reply secinfo: %d\n", status);
6672
6673 if (cred)
6674 put_rpccred(cred);
6675
6676 return status;
6677}
6678
6679int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6680 struct nfs4_secinfo_flavors *flavors)
6681{
6682 struct nfs4_exception exception = { };
6683 int err;
6684 do {
6685 err = -NFS4ERR_WRONGSEC;
6686
6687 /* try to use integrity protection with machine cred */
6688 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6689 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6690
6691 /*
6692 * if unable to use integrity protection, or SECINFO with
6693 * integrity protection returns NFS4ERR_WRONGSEC (which is
6694 * disallowed by spec, but exists in deployed servers) use
6695 * the current filesystem's rpc_client and the user cred.
6696 */
6697 if (err == -NFS4ERR_WRONGSEC)
6698 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6699
6700 trace_nfs4_secinfo(dir, name, err);
6701 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6702 &exception);
6703 } while (exception.retry);
6704 return err;
6705}
6706
6707#ifdef CONFIG_NFS_V4_1
6708/*
6709 * Check the exchange flags returned by the server for invalid flags, having
6710 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6711 * DS flags set.
6712 */
6713static int nfs4_check_cl_exchange_flags(u32 flags)
6714{
6715 if (flags & ~EXCHGID4_FLAG_MASK_R)
6716 goto out_inval;
6717 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6718 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6719 goto out_inval;
6720 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6721 goto out_inval;
6722 return NFS_OK;
6723out_inval:
6724 return -NFS4ERR_INVAL;
6725}
6726
6727static bool
6728nfs41_same_server_scope(struct nfs41_server_scope *a,
6729 struct nfs41_server_scope *b)
6730{
6731 if (a->server_scope_sz == b->server_scope_sz &&
6732 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6733 return true;
6734
6735 return false;
6736}
6737
6738/*
6739 * nfs4_proc_bind_conn_to_session()
6740 *
6741 * The 4.1 client currently uses the same TCP connection for the
6742 * fore and backchannel.
6743 */
6744int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6745{
6746 int status;
6747 struct nfs41_bind_conn_to_session_args args = {
6748 .client = clp,
6749 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6750 };
6751 struct nfs41_bind_conn_to_session_res res;
6752 struct rpc_message msg = {
6753 .rpc_proc =
6754 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6755 .rpc_argp = &args,
6756 .rpc_resp = &res,
6757 .rpc_cred = cred,
6758 };
6759
6760 dprintk("--> %s\n", __func__);
6761
6762 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6763 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6764 args.dir = NFS4_CDFC4_FORE;
6765
6766 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6767 trace_nfs4_bind_conn_to_session(clp, status);
6768 if (status == 0) {
6769 if (memcmp(res.sessionid.data,
6770 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6771 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6772 status = -EIO;
6773 goto out;
6774 }
6775 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6776 dprintk("NFS: %s: Unexpected direction from server\n",
6777 __func__);
6778 status = -EIO;
6779 goto out;
6780 }
6781 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6782 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6783 __func__);
6784 status = -EIO;
6785 goto out;
6786 }
6787 }
6788out:
6789 dprintk("<-- %s status= %d\n", __func__, status);
6790 return status;
6791}
6792
6793/*
6794 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6795 * and operations we'd like to see to enable certain features in the allow map
6796 */
6797static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6798 .how = SP4_MACH_CRED,
6799 .enforce.u.words = {
6800 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6801 1 << (OP_EXCHANGE_ID - 32) |
6802 1 << (OP_CREATE_SESSION - 32) |
6803 1 << (OP_DESTROY_SESSION - 32) |
6804 1 << (OP_DESTROY_CLIENTID - 32)
6805 },
6806 .allow.u.words = {
6807 [0] = 1 << (OP_CLOSE) |
6808 1 << (OP_LOCKU) |
6809 1 << (OP_COMMIT),
6810 [1] = 1 << (OP_SECINFO - 32) |
6811 1 << (OP_SECINFO_NO_NAME - 32) |
6812 1 << (OP_TEST_STATEID - 32) |
6813 1 << (OP_FREE_STATEID - 32) |
6814 1 << (OP_WRITE - 32)
6815 }
6816};
6817
6818/*
6819 * Select the state protection mode for client `clp' given the server results
6820 * from exchange_id in `sp'.
6821 *
6822 * Returns 0 on success, negative errno otherwise.
6823 */
6824static int nfs4_sp4_select_mode(struct nfs_client *clp,
6825 struct nfs41_state_protection *sp)
6826{
6827 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6828 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6829 1 << (OP_EXCHANGE_ID - 32) |
6830 1 << (OP_CREATE_SESSION - 32) |
6831 1 << (OP_DESTROY_SESSION - 32) |
6832 1 << (OP_DESTROY_CLIENTID - 32)
6833 };
6834 unsigned int i;
6835
6836 if (sp->how == SP4_MACH_CRED) {
6837 /* Print state protect result */
6838 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6839 for (i = 0; i <= LAST_NFS4_OP; i++) {
6840 if (test_bit(i, sp->enforce.u.longs))
6841 dfprintk(MOUNT, " enforce op %d\n", i);
6842 if (test_bit(i, sp->allow.u.longs))
6843 dfprintk(MOUNT, " allow op %d\n", i);
6844 }
6845
6846 /* make sure nothing is on enforce list that isn't supported */
6847 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6848 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6849 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6850 return -EINVAL;
6851 }
6852 }
6853
6854 /*
6855 * Minimal mode - state operations are allowed to use machine
6856 * credential. Note this already happens by default, so the
6857 * client doesn't have to do anything more than the negotiation.
6858 *
6859 * NOTE: we don't care if EXCHANGE_ID is in the list -
6860 * we're already using the machine cred for exchange_id
6861 * and will never use a different cred.
6862 */
6863 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6864 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6865 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6866 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6867 dfprintk(MOUNT, "sp4_mach_cred:\n");
6868 dfprintk(MOUNT, " minimal mode enabled\n");
6869 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6870 } else {
6871 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6872 return -EINVAL;
6873 }
6874
6875 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6876 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6877 dfprintk(MOUNT, " cleanup mode enabled\n");
6878 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6879 }
6880
6881 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6882 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6883 dfprintk(MOUNT, " secinfo mode enabled\n");
6884 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6885 }
6886
6887 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6888 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6889 dfprintk(MOUNT, " stateid mode enabled\n");
6890 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6891 }
6892
6893 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6894 dfprintk(MOUNT, " write mode enabled\n");
6895 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6896 }
6897
6898 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6899 dfprintk(MOUNT, " commit mode enabled\n");
6900 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6901 }
6902 }
6903
6904 return 0;
6905}
6906
6907/*
6908 * _nfs4_proc_exchange_id()
6909 *
6910 * Wrapper for EXCHANGE_ID operation.
6911 */
6912static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6913 u32 sp4_how)
6914{
6915 nfs4_verifier verifier;
6916 struct nfs41_exchange_id_args args = {
6917 .verifier = &verifier,
6918 .client = clp,
6919#ifdef CONFIG_NFS_V4_1_MIGRATION
6920 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6921 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6922 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6923#else
6924 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6925 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6926#endif
6927 };
6928 struct nfs41_exchange_id_res res = {
6929 0
6930 };
6931 int status;
6932 struct rpc_message msg = {
6933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6934 .rpc_argp = &args,
6935 .rpc_resp = &res,
6936 .rpc_cred = cred,
6937 };
6938
6939 nfs4_init_boot_verifier(clp, &verifier);
6940
6941 status = nfs4_init_uniform_client_string(clp);
6942 if (status)
6943 goto out;
6944
6945 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6946 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6947 clp->cl_owner_id);
6948
6949 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6950 GFP_NOFS);
6951 if (unlikely(res.server_owner == NULL)) {
6952 status = -ENOMEM;
6953 goto out;
6954 }
6955
6956 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6957 GFP_NOFS);
6958 if (unlikely(res.server_scope == NULL)) {
6959 status = -ENOMEM;
6960 goto out_server_owner;
6961 }
6962
6963 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6964 if (unlikely(res.impl_id == NULL)) {
6965 status = -ENOMEM;
6966 goto out_server_scope;
6967 }
6968
6969 switch (sp4_how) {
6970 case SP4_NONE:
6971 args.state_protect.how = SP4_NONE;
6972 break;
6973
6974 case SP4_MACH_CRED:
6975 args.state_protect = nfs4_sp4_mach_cred_request;
6976 break;
6977
6978 default:
6979 /* unsupported! */
6980 WARN_ON_ONCE(1);
6981 status = -EINVAL;
6982 goto out_impl_id;
6983 }
6984
6985 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6986 trace_nfs4_exchange_id(clp, status);
6987 if (status == 0)
6988 status = nfs4_check_cl_exchange_flags(res.flags);
6989
6990 if (status == 0)
6991 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6992
6993 if (status == 0) {
6994 clp->cl_clientid = res.clientid;
6995 clp->cl_exchange_flags = res.flags;
6996 /* Client ID is not confirmed */
6997 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6998 clear_bit(NFS4_SESSION_ESTABLISHED,
6999 &clp->cl_session->session_state);
7000 clp->cl_seqid = res.seqid;
7001 }
7002
7003 kfree(clp->cl_serverowner);
7004 clp->cl_serverowner = res.server_owner;
7005 res.server_owner = NULL;
7006
7007 /* use the most recent implementation id */
7008 kfree(clp->cl_implid);
7009 clp->cl_implid = res.impl_id;
7010 res.impl_id = NULL;
7011
7012 if (clp->cl_serverscope != NULL &&
7013 !nfs41_same_server_scope(clp->cl_serverscope,
7014 res.server_scope)) {
7015 dprintk("%s: server_scope mismatch detected\n",
7016 __func__);
7017 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7018 kfree(clp->cl_serverscope);
7019 clp->cl_serverscope = NULL;
7020 }
7021
7022 if (clp->cl_serverscope == NULL) {
7023 clp->cl_serverscope = res.server_scope;
7024 res.server_scope = NULL;
7025 }
7026 }
7027
7028out_impl_id:
7029 kfree(res.impl_id);
7030out_server_scope:
7031 kfree(res.server_scope);
7032out_server_owner:
7033 kfree(res.server_owner);
7034out:
7035 if (clp->cl_implid != NULL)
7036 dprintk("NFS reply exchange_id: Server Implementation ID: "
7037 "domain: %s, name: %s, date: %llu,%u\n",
7038 clp->cl_implid->domain, clp->cl_implid->name,
7039 clp->cl_implid->date.seconds,
7040 clp->cl_implid->date.nseconds);
7041 dprintk("NFS reply exchange_id: %d\n", status);
7042 return status;
7043}
7044
7045/*
7046 * nfs4_proc_exchange_id()
7047 *
7048 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7049 *
7050 * Since the clientid has expired, all compounds using sessions
7051 * associated with the stale clientid will be returning
7052 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7053 * be in some phase of session reset.
7054 *
7055 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7056 */
7057int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7058{
7059 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7060 int status;
7061
7062 /* try SP4_MACH_CRED if krb5i/p */
7063 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7064 authflavor == RPC_AUTH_GSS_KRB5P) {
7065 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7066 if (!status)
7067 return 0;
7068 }
7069
7070 /* try SP4_NONE */
7071 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7072}
7073
7074static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7075 struct rpc_cred *cred)
7076{
7077 struct rpc_message msg = {
7078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7079 .rpc_argp = clp,
7080 .rpc_cred = cred,
7081 };
7082 int status;
7083
7084 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7085 trace_nfs4_destroy_clientid(clp, status);
7086 if (status)
7087 dprintk("NFS: Got error %d from the server %s on "
7088 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7089 return status;
7090}
7091
7092static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7093 struct rpc_cred *cred)
7094{
7095 unsigned int loop;
7096 int ret;
7097
7098 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7099 ret = _nfs4_proc_destroy_clientid(clp, cred);
7100 switch (ret) {
7101 case -NFS4ERR_DELAY:
7102 case -NFS4ERR_CLIENTID_BUSY:
7103 ssleep(1);
7104 break;
7105 default:
7106 return ret;
7107 }
7108 }
7109 return 0;
7110}
7111
7112int nfs4_destroy_clientid(struct nfs_client *clp)
7113{
7114 struct rpc_cred *cred;
7115 int ret = 0;
7116
7117 if (clp->cl_mvops->minor_version < 1)
7118 goto out;
7119 if (clp->cl_exchange_flags == 0)
7120 goto out;
7121 if (clp->cl_preserve_clid)
7122 goto out;
7123 cred = nfs4_get_clid_cred(clp);
7124 ret = nfs4_proc_destroy_clientid(clp, cred);
7125 if (cred)
7126 put_rpccred(cred);
7127 switch (ret) {
7128 case 0:
7129 case -NFS4ERR_STALE_CLIENTID:
7130 clp->cl_exchange_flags = 0;
7131 }
7132out:
7133 return ret;
7134}
7135
7136struct nfs4_get_lease_time_data {
7137 struct nfs4_get_lease_time_args *args;
7138 struct nfs4_get_lease_time_res *res;
7139 struct nfs_client *clp;
7140};
7141
7142static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7143 void *calldata)
7144{
7145 struct nfs4_get_lease_time_data *data =
7146 (struct nfs4_get_lease_time_data *)calldata;
7147
7148 dprintk("--> %s\n", __func__);
7149 /* just setup sequence, do not trigger session recovery
7150 since we're invoked within one */
7151 nfs41_setup_sequence(data->clp->cl_session,
7152 &data->args->la_seq_args,
7153 &data->res->lr_seq_res,
7154 task);
7155 dprintk("<-- %s\n", __func__);
7156}
7157
7158/*
7159 * Called from nfs4_state_manager thread for session setup, so don't recover
7160 * from sequence operation or clientid errors.
7161 */
7162static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7163{
7164 struct nfs4_get_lease_time_data *data =
7165 (struct nfs4_get_lease_time_data *)calldata;
7166
7167 dprintk("--> %s\n", __func__);
7168 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7169 return;
7170 switch (task->tk_status) {
7171 case -NFS4ERR_DELAY:
7172 case -NFS4ERR_GRACE:
7173 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7174 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7175 task->tk_status = 0;
7176 /* fall through */
7177 case -NFS4ERR_RETRY_UNCACHED_REP:
7178 rpc_restart_call_prepare(task);
7179 return;
7180 }
7181 dprintk("<-- %s\n", __func__);
7182}
7183
7184static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7185 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7186 .rpc_call_done = nfs4_get_lease_time_done,
7187};
7188
7189int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7190{
7191 struct rpc_task *task;
7192 struct nfs4_get_lease_time_args args;
7193 struct nfs4_get_lease_time_res res = {
7194 .lr_fsinfo = fsinfo,
7195 };
7196 struct nfs4_get_lease_time_data data = {
7197 .args = &args,
7198 .res = &res,
7199 .clp = clp,
7200 };
7201 struct rpc_message msg = {
7202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7203 .rpc_argp = &args,
7204 .rpc_resp = &res,
7205 };
7206 struct rpc_task_setup task_setup = {
7207 .rpc_client = clp->cl_rpcclient,
7208 .rpc_message = &msg,
7209 .callback_ops = &nfs4_get_lease_time_ops,
7210 .callback_data = &data,
7211 .flags = RPC_TASK_TIMEOUT,
7212 };
7213 int status;
7214
7215 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7216 nfs4_set_sequence_privileged(&args.la_seq_args);
7217 dprintk("--> %s\n", __func__);
7218 task = rpc_run_task(&task_setup);
7219
7220 if (IS_ERR(task))
7221 status = PTR_ERR(task);
7222 else {
7223 status = task->tk_status;
7224 rpc_put_task(task);
7225 }
7226 dprintk("<-- %s return %d\n", __func__, status);
7227
7228 return status;
7229}
7230
7231/*
7232 * Initialize the values to be used by the client in CREATE_SESSION
7233 * If nfs4_init_session set the fore channel request and response sizes,
7234 * use them.
7235 *
7236 * Set the back channel max_resp_sz_cached to zero to force the client to
7237 * always set csa_cachethis to FALSE because the current implementation
7238 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7239 */
7240static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7241{
7242 unsigned int max_rqst_sz, max_resp_sz;
7243
7244 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7245 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7246
7247 /* Fore channel attributes */
7248 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7249 args->fc_attrs.max_resp_sz = max_resp_sz;
7250 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7251 args->fc_attrs.max_reqs = max_session_slots;
7252
7253 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7254 "max_ops=%u max_reqs=%u\n",
7255 __func__,
7256 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7257 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7258
7259 /* Back channel attributes */
7260 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7261 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7262 args->bc_attrs.max_resp_sz_cached = 0;
7263 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7264 args->bc_attrs.max_reqs = 1;
7265
7266 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7267 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7268 __func__,
7269 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7270 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7271 args->bc_attrs.max_reqs);
7272}
7273
7274static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7275 struct nfs41_create_session_res *res)
7276{
7277 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7278 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7279
7280 if (rcvd->max_resp_sz > sent->max_resp_sz)
7281 return -EINVAL;
7282 /*
7283 * Our requested max_ops is the minimum we need; we're not
7284 * prepared to break up compounds into smaller pieces than that.
7285 * So, no point even trying to continue if the server won't
7286 * cooperate:
7287 */
7288 if (rcvd->max_ops < sent->max_ops)
7289 return -EINVAL;
7290 if (rcvd->max_reqs == 0)
7291 return -EINVAL;
7292 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7293 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7294 return 0;
7295}
7296
7297static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7298 struct nfs41_create_session_res *res)
7299{
7300 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7301 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7302
7303 if (!(res->flags & SESSION4_BACK_CHAN))
7304 goto out;
7305 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7306 return -EINVAL;
7307 if (rcvd->max_resp_sz < sent->max_resp_sz)
7308 return -EINVAL;
7309 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7310 return -EINVAL;
7311 /* These would render the backchannel useless: */
7312 if (rcvd->max_ops != sent->max_ops)
7313 return -EINVAL;
7314 if (rcvd->max_reqs != sent->max_reqs)
7315 return -EINVAL;
7316out:
7317 return 0;
7318}
7319
7320static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7321 struct nfs41_create_session_res *res)
7322{
7323 int ret;
7324
7325 ret = nfs4_verify_fore_channel_attrs(args, res);
7326 if (ret)
7327 return ret;
7328 return nfs4_verify_back_channel_attrs(args, res);
7329}
7330
7331static void nfs4_update_session(struct nfs4_session *session,
7332 struct nfs41_create_session_res *res)
7333{
7334 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7335 /* Mark client id and session as being confirmed */
7336 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7337 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7338 session->flags = res->flags;
7339 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7340 if (res->flags & SESSION4_BACK_CHAN)
7341 memcpy(&session->bc_attrs, &res->bc_attrs,
7342 sizeof(session->bc_attrs));
7343}
7344
7345static int _nfs4_proc_create_session(struct nfs_client *clp,
7346 struct rpc_cred *cred)
7347{
7348 struct nfs4_session *session = clp->cl_session;
7349 struct nfs41_create_session_args args = {
7350 .client = clp,
7351 .clientid = clp->cl_clientid,
7352 .seqid = clp->cl_seqid,
7353 .cb_program = NFS4_CALLBACK,
7354 };
7355 struct nfs41_create_session_res res;
7356
7357 struct rpc_message msg = {
7358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7359 .rpc_argp = &args,
7360 .rpc_resp = &res,
7361 .rpc_cred = cred,
7362 };
7363 int status;
7364
7365 nfs4_init_channel_attrs(&args);
7366 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7367
7368 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7369 trace_nfs4_create_session(clp, status);
7370
7371 if (!status) {
7372 /* Verify the session's negotiated channel_attrs values */
7373 status = nfs4_verify_channel_attrs(&args, &res);
7374 /* Increment the clientid slot sequence id */
7375 if (clp->cl_seqid == res.seqid)
7376 clp->cl_seqid++;
7377 if (status)
7378 goto out;
7379 nfs4_update_session(session, &res);
7380 }
7381out:
7382 return status;
7383}
7384
7385/*
7386 * Issues a CREATE_SESSION operation to the server.
7387 * It is the responsibility of the caller to verify the session is
7388 * expired before calling this routine.
7389 */
7390int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7391{
7392 int status;
7393 unsigned *ptr;
7394 struct nfs4_session *session = clp->cl_session;
7395
7396 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7397
7398 status = _nfs4_proc_create_session(clp, cred);
7399 if (status)
7400 goto out;
7401
7402 /* Init or reset the session slot tables */
7403 status = nfs4_setup_session_slot_tables(session);
7404 dprintk("slot table setup returned %d\n", status);
7405 if (status)
7406 goto out;
7407
7408 ptr = (unsigned *)&session->sess_id.data[0];
7409 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7410 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7411out:
7412 dprintk("<-- %s\n", __func__);
7413 return status;
7414}
7415
7416/*
7417 * Issue the over-the-wire RPC DESTROY_SESSION.
7418 * The caller must serialize access to this routine.
7419 */
7420int nfs4_proc_destroy_session(struct nfs4_session *session,
7421 struct rpc_cred *cred)
7422{
7423 struct rpc_message msg = {
7424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7425 .rpc_argp = session,
7426 .rpc_cred = cred,
7427 };
7428 int status = 0;
7429
7430 dprintk("--> nfs4_proc_destroy_session\n");
7431
7432 /* session is still being setup */
7433 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7434 return 0;
7435
7436 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7437 trace_nfs4_destroy_session(session->clp, status);
7438
7439 if (status)
7440 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7441 "Session has been destroyed regardless...\n", status);
7442
7443 dprintk("<-- nfs4_proc_destroy_session\n");
7444 return status;
7445}
7446
7447/*
7448 * Renew the cl_session lease.
7449 */
7450struct nfs4_sequence_data {
7451 struct nfs_client *clp;
7452 struct nfs4_sequence_args args;
7453 struct nfs4_sequence_res res;
7454};
7455
7456static void nfs41_sequence_release(void *data)
7457{
7458 struct nfs4_sequence_data *calldata = data;
7459 struct nfs_client *clp = calldata->clp;
7460
7461 if (atomic_read(&clp->cl_count) > 1)
7462 nfs4_schedule_state_renewal(clp);
7463 nfs_put_client(clp);
7464 kfree(calldata);
7465}
7466
7467static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7468{
7469 switch(task->tk_status) {
7470 case -NFS4ERR_DELAY:
7471 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7472 return -EAGAIN;
7473 default:
7474 nfs4_schedule_lease_recovery(clp);
7475 }
7476 return 0;
7477}
7478
7479static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7480{
7481 struct nfs4_sequence_data *calldata = data;
7482 struct nfs_client *clp = calldata->clp;
7483
7484 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7485 return;
7486
7487 trace_nfs4_sequence(clp, task->tk_status);
7488 if (task->tk_status < 0) {
7489 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7490 if (atomic_read(&clp->cl_count) == 1)
7491 goto out;
7492
7493 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7494 rpc_restart_call_prepare(task);
7495 return;
7496 }
7497 }
7498 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7499out:
7500 dprintk("<-- %s\n", __func__);
7501}
7502
7503static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7504{
7505 struct nfs4_sequence_data *calldata = data;
7506 struct nfs_client *clp = calldata->clp;
7507 struct nfs4_sequence_args *args;
7508 struct nfs4_sequence_res *res;
7509
7510 args = task->tk_msg.rpc_argp;
7511 res = task->tk_msg.rpc_resp;
7512
7513 nfs41_setup_sequence(clp->cl_session, args, res, task);
7514}
7515
7516static const struct rpc_call_ops nfs41_sequence_ops = {
7517 .rpc_call_done = nfs41_sequence_call_done,
7518 .rpc_call_prepare = nfs41_sequence_prepare,
7519 .rpc_release = nfs41_sequence_release,
7520};
7521
7522static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7523 struct rpc_cred *cred,
7524 bool is_privileged)
7525{
7526 struct nfs4_sequence_data *calldata;
7527 struct rpc_message msg = {
7528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7529 .rpc_cred = cred,
7530 };
7531 struct rpc_task_setup task_setup_data = {
7532 .rpc_client = clp->cl_rpcclient,
7533 .rpc_message = &msg,
7534 .callback_ops = &nfs41_sequence_ops,
7535 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7536 };
7537
7538 if (!atomic_inc_not_zero(&clp->cl_count))
7539 return ERR_PTR(-EIO);
7540 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7541 if (calldata == NULL) {
7542 nfs_put_client(clp);
7543 return ERR_PTR(-ENOMEM);
7544 }
7545 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7546 if (is_privileged)
7547 nfs4_set_sequence_privileged(&calldata->args);
7548 msg.rpc_argp = &calldata->args;
7549 msg.rpc_resp = &calldata->res;
7550 calldata->clp = clp;
7551 task_setup_data.callback_data = calldata;
7552
7553 return rpc_run_task(&task_setup_data);
7554}
7555
7556static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7557{
7558 struct rpc_task *task;
7559 int ret = 0;
7560
7561 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7562 return -EAGAIN;
7563 task = _nfs41_proc_sequence(clp, cred, false);
7564 if (IS_ERR(task))
7565 ret = PTR_ERR(task);
7566 else
7567 rpc_put_task_async(task);
7568 dprintk("<-- %s status=%d\n", __func__, ret);
7569 return ret;
7570}
7571
7572static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7573{
7574 struct rpc_task *task;
7575 int ret;
7576
7577 task = _nfs41_proc_sequence(clp, cred, true);
7578 if (IS_ERR(task)) {
7579 ret = PTR_ERR(task);
7580 goto out;
7581 }
7582 ret = rpc_wait_for_completion_task(task);
7583 if (!ret)
7584 ret = task->tk_status;
7585 rpc_put_task(task);
7586out:
7587 dprintk("<-- %s status=%d\n", __func__, ret);
7588 return ret;
7589}
7590
7591struct nfs4_reclaim_complete_data {
7592 struct nfs_client *clp;
7593 struct nfs41_reclaim_complete_args arg;
7594 struct nfs41_reclaim_complete_res res;
7595};
7596
7597static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7598{
7599 struct nfs4_reclaim_complete_data *calldata = data;
7600
7601 nfs41_setup_sequence(calldata->clp->cl_session,
7602 &calldata->arg.seq_args,
7603 &calldata->res.seq_res,
7604 task);
7605}
7606
7607static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7608{
7609 switch(task->tk_status) {
7610 case 0:
7611 case -NFS4ERR_COMPLETE_ALREADY:
7612 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7613 break;
7614 case -NFS4ERR_DELAY:
7615 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7616 /* fall through */
7617 case -NFS4ERR_RETRY_UNCACHED_REP:
7618 return -EAGAIN;
7619 default:
7620 nfs4_schedule_lease_recovery(clp);
7621 }
7622 return 0;
7623}
7624
7625static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7626{
7627 struct nfs4_reclaim_complete_data *calldata = data;
7628 struct nfs_client *clp = calldata->clp;
7629 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7630
7631 dprintk("--> %s\n", __func__);
7632 if (!nfs41_sequence_done(task, res))
7633 return;
7634
7635 trace_nfs4_reclaim_complete(clp, task->tk_status);
7636 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7637 rpc_restart_call_prepare(task);
7638 return;
7639 }
7640 dprintk("<-- %s\n", __func__);
7641}
7642
7643static void nfs4_free_reclaim_complete_data(void *data)
7644{
7645 struct nfs4_reclaim_complete_data *calldata = data;
7646
7647 kfree(calldata);
7648}
7649
7650static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7651 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7652 .rpc_call_done = nfs4_reclaim_complete_done,
7653 .rpc_release = nfs4_free_reclaim_complete_data,
7654};
7655
7656/*
7657 * Issue a global reclaim complete.
7658 */
7659static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7660 struct rpc_cred *cred)
7661{
7662 struct nfs4_reclaim_complete_data *calldata;
7663 struct rpc_task *task;
7664 struct rpc_message msg = {
7665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7666 .rpc_cred = cred,
7667 };
7668 struct rpc_task_setup task_setup_data = {
7669 .rpc_client = clp->cl_rpcclient,
7670 .rpc_message = &msg,
7671 .callback_ops = &nfs4_reclaim_complete_call_ops,
7672 .flags = RPC_TASK_ASYNC,
7673 };
7674 int status = -ENOMEM;
7675
7676 dprintk("--> %s\n", __func__);
7677 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7678 if (calldata == NULL)
7679 goto out;
7680 calldata->clp = clp;
7681 calldata->arg.one_fs = 0;
7682
7683 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7684 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7685 msg.rpc_argp = &calldata->arg;
7686 msg.rpc_resp = &calldata->res;
7687 task_setup_data.callback_data = calldata;
7688 task = rpc_run_task(&task_setup_data);
7689 if (IS_ERR(task)) {
7690 status = PTR_ERR(task);
7691 goto out;
7692 }
7693 status = nfs4_wait_for_completion_rpc_task(task);
7694 if (status == 0)
7695 status = task->tk_status;
7696 rpc_put_task(task);
7697 return 0;
7698out:
7699 dprintk("<-- %s status=%d\n", __func__, status);
7700 return status;
7701}
7702
7703static void
7704nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7705{
7706 struct nfs4_layoutget *lgp = calldata;
7707 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7708 struct nfs4_session *session = nfs4_get_session(server);
7709
7710 dprintk("--> %s\n", __func__);
7711 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7712 * right now covering the LAYOUTGET we are about to send.
7713 * However, that is not so catastrophic, and there seems
7714 * to be no way to prevent it completely.
7715 */
7716 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7717 &lgp->res.seq_res, task))
7718 return;
7719 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7720 NFS_I(lgp->args.inode)->layout,
7721 &lgp->args.range,
7722 lgp->args.ctx->state)) {
7723 rpc_exit(task, NFS4_OK);
7724 }
7725}
7726
7727static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7728{
7729 struct nfs4_layoutget *lgp = calldata;
7730 struct inode *inode = lgp->args.inode;
7731 struct nfs_server *server = NFS_SERVER(inode);
7732 struct pnfs_layout_hdr *lo;
7733 struct nfs4_state *state = NULL;
7734 unsigned long timeo, now, giveup;
7735
7736 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7737
7738 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7739 goto out;
7740
7741 switch (task->tk_status) {
7742 case 0:
7743 goto out;
7744 /*
7745 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7746 * (or clients) writing to the same RAID stripe
7747 */
7748 case -NFS4ERR_LAYOUTTRYLATER:
7749 /*
7750 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7751 * existing layout before getting a new one).
7752 */
7753 case -NFS4ERR_RECALLCONFLICT:
7754 timeo = rpc_get_timeout(task->tk_client);
7755 giveup = lgp->args.timestamp + timeo;
7756 now = jiffies;
7757 if (time_after(giveup, now)) {
7758 unsigned long delay;
7759
7760 /* Delay for:
7761 * - Not less then NFS4_POLL_RETRY_MIN.
7762 * - One last time a jiffie before we give up
7763 * - exponential backoff (time_now minus start_attempt)
7764 */
7765 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7766 min((giveup - now - 1),
7767 now - lgp->args.timestamp));
7768
7769 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7770 __func__, delay);
7771 rpc_delay(task, delay);
7772 task->tk_status = 0;
7773 rpc_restart_call_prepare(task);
7774 goto out; /* Do not call nfs4_async_handle_error() */
7775 }
7776 break;
7777 case -NFS4ERR_EXPIRED:
7778 case -NFS4ERR_BAD_STATEID:
7779 spin_lock(&inode->i_lock);
7780 lo = NFS_I(inode)->layout;
7781 if (!lo || list_empty(&lo->plh_segs)) {
7782 spin_unlock(&inode->i_lock);
7783 /* If the open stateid was bad, then recover it. */
7784 state = lgp->args.ctx->state;
7785 } else {
7786 LIST_HEAD(head);
7787
7788 /*
7789 * Mark the bad layout state as invalid, then retry
7790 * with the current stateid.
7791 */
7792 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7793 spin_unlock(&inode->i_lock);
7794 pnfs_free_lseg_list(&head);
7795
7796 task->tk_status = 0;
7797 rpc_restart_call_prepare(task);
7798 }
7799 }
7800 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7801 rpc_restart_call_prepare(task);
7802out:
7803 dprintk("<-- %s\n", __func__);
7804}
7805
7806static size_t max_response_pages(struct nfs_server *server)
7807{
7808 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7809 return nfs_page_array_len(0, max_resp_sz);
7810}
7811
7812static void nfs4_free_pages(struct page **pages, size_t size)
7813{
7814 int i;
7815
7816 if (!pages)
7817 return;
7818
7819 for (i = 0; i < size; i++) {
7820 if (!pages[i])
7821 break;
7822 __free_page(pages[i]);
7823 }
7824 kfree(pages);
7825}
7826
7827static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7828{
7829 struct page **pages;
7830 int i;
7831
7832 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7833 if (!pages) {
7834 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7835 return NULL;
7836 }
7837
7838 for (i = 0; i < size; i++) {
7839 pages[i] = alloc_page(gfp_flags);
7840 if (!pages[i]) {
7841 dprintk("%s: failed to allocate page\n", __func__);
7842 nfs4_free_pages(pages, size);
7843 return NULL;
7844 }
7845 }
7846
7847 return pages;
7848}
7849
7850static void nfs4_layoutget_release(void *calldata)
7851{
7852 struct nfs4_layoutget *lgp = calldata;
7853 struct inode *inode = lgp->args.inode;
7854 struct nfs_server *server = NFS_SERVER(inode);
7855 size_t max_pages = max_response_pages(server);
7856
7857 dprintk("--> %s\n", __func__);
7858 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7859 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7860 put_nfs_open_context(lgp->args.ctx);
7861 kfree(calldata);
7862 dprintk("<-- %s\n", __func__);
7863}
7864
7865static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7866 .rpc_call_prepare = nfs4_layoutget_prepare,
7867 .rpc_call_done = nfs4_layoutget_done,
7868 .rpc_release = nfs4_layoutget_release,
7869};
7870
7871struct pnfs_layout_segment *
7872nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7873{
7874 struct inode *inode = lgp->args.inode;
7875 struct nfs_server *server = NFS_SERVER(inode);
7876 size_t max_pages = max_response_pages(server);
7877 struct rpc_task *task;
7878 struct rpc_message msg = {
7879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7880 .rpc_argp = &lgp->args,
7881 .rpc_resp = &lgp->res,
7882 .rpc_cred = lgp->cred,
7883 };
7884 struct rpc_task_setup task_setup_data = {
7885 .rpc_client = server->client,
7886 .rpc_message = &msg,
7887 .callback_ops = &nfs4_layoutget_call_ops,
7888 .callback_data = lgp,
7889 .flags = RPC_TASK_ASYNC,
7890 };
7891 struct pnfs_layout_segment *lseg = NULL;
7892 int status = 0;
7893
7894 dprintk("--> %s\n", __func__);
7895
7896 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7897 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7898
7899 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7900 if (!lgp->args.layout.pages) {
7901 nfs4_layoutget_release(lgp);
7902 return ERR_PTR(-ENOMEM);
7903 }
7904 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7905 lgp->args.timestamp = jiffies;
7906
7907 lgp->res.layoutp = &lgp->args.layout;
7908 lgp->res.seq_res.sr_slot = NULL;
7909 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7910
7911 task = rpc_run_task(&task_setup_data);
7912 if (IS_ERR(task))
7913 return ERR_CAST(task);
7914 status = nfs4_wait_for_completion_rpc_task(task);
7915 if (status == 0)
7916 status = task->tk_status;
7917 trace_nfs4_layoutget(lgp->args.ctx,
7918 &lgp->args.range,
7919 &lgp->res.range,
7920 status);
7921 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7922 if (status == 0 && lgp->res.layoutp->len)
7923 lseg = pnfs_layout_process(lgp);
7924 rpc_put_task(task);
7925 dprintk("<-- %s status=%d\n", __func__, status);
7926 if (status)
7927 return ERR_PTR(status);
7928 return lseg;
7929}
7930
7931static void
7932nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7933{
7934 struct nfs4_layoutreturn *lrp = calldata;
7935
7936 dprintk("--> %s\n", __func__);
7937 nfs41_setup_sequence(lrp->clp->cl_session,
7938 &lrp->args.seq_args,
7939 &lrp->res.seq_res,
7940 task);
7941}
7942
7943static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7944{
7945 struct nfs4_layoutreturn *lrp = calldata;
7946 struct nfs_server *server;
7947
7948 dprintk("--> %s\n", __func__);
7949
7950 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7951 return;
7952
7953 server = NFS_SERVER(lrp->args.inode);
7954 switch (task->tk_status) {
7955 default:
7956 task->tk_status = 0;
7957 case 0:
7958 break;
7959 case -NFS4ERR_DELAY:
7960 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7961 break;
7962 rpc_restart_call_prepare(task);
7963 return;
7964 }
7965 dprintk("<-- %s\n", __func__);
7966}
7967
7968static void nfs4_layoutreturn_release(void *calldata)
7969{
7970 struct nfs4_layoutreturn *lrp = calldata;
7971 struct pnfs_layout_hdr *lo = lrp->args.layout;
7972 LIST_HEAD(freeme);
7973
7974 dprintk("--> %s\n", __func__);
7975 spin_lock(&lo->plh_inode->i_lock);
7976 if (lrp->res.lrs_present)
7977 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7978 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
7979 pnfs_clear_layoutreturn_waitbit(lo);
7980 lo->plh_block_lgets--;
7981 spin_unlock(&lo->plh_inode->i_lock);
7982 pnfs_free_lseg_list(&freeme);
7983 pnfs_put_layout_hdr(lrp->args.layout);
7984 nfs_iput_and_deactive(lrp->inode);
7985 kfree(calldata);
7986 dprintk("<-- %s\n", __func__);
7987}
7988
7989static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7990 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7991 .rpc_call_done = nfs4_layoutreturn_done,
7992 .rpc_release = nfs4_layoutreturn_release,
7993};
7994
7995int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
7996{
7997 struct rpc_task *task;
7998 struct rpc_message msg = {
7999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8000 .rpc_argp = &lrp->args,
8001 .rpc_resp = &lrp->res,
8002 .rpc_cred = lrp->cred,
8003 };
8004 struct rpc_task_setup task_setup_data = {
8005 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8006 .rpc_message = &msg,
8007 .callback_ops = &nfs4_layoutreturn_call_ops,
8008 .callback_data = lrp,
8009 };
8010 int status = 0;
8011
8012 dprintk("--> %s\n", __func__);
8013 if (!sync) {
8014 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8015 if (!lrp->inode) {
8016 nfs4_layoutreturn_release(lrp);
8017 return -EAGAIN;
8018 }
8019 task_setup_data.flags |= RPC_TASK_ASYNC;
8020 }
8021 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8022 task = rpc_run_task(&task_setup_data);
8023 if (IS_ERR(task))
8024 return PTR_ERR(task);
8025 if (sync)
8026 status = task->tk_status;
8027 trace_nfs4_layoutreturn(lrp->args.inode, status);
8028 dprintk("<-- %s status=%d\n", __func__, status);
8029 rpc_put_task(task);
8030 return status;
8031}
8032
8033static int
8034_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8035 struct pnfs_device *pdev,
8036 struct rpc_cred *cred)
8037{
8038 struct nfs4_getdeviceinfo_args args = {
8039 .pdev = pdev,
8040 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8041 NOTIFY_DEVICEID4_DELETE,
8042 };
8043 struct nfs4_getdeviceinfo_res res = {
8044 .pdev = pdev,
8045 };
8046 struct rpc_message msg = {
8047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8048 .rpc_argp = &args,
8049 .rpc_resp = &res,
8050 .rpc_cred = cred,
8051 };
8052 int status;
8053
8054 dprintk("--> %s\n", __func__);
8055 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8056 if (res.notification & ~args.notify_types)
8057 dprintk("%s: unsupported notification\n", __func__);
8058 if (res.notification != args.notify_types)
8059 pdev->nocache = 1;
8060
8061 dprintk("<-- %s status=%d\n", __func__, status);
8062
8063 return status;
8064}
8065
8066int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8067 struct pnfs_device *pdev,
8068 struct rpc_cred *cred)
8069{
8070 struct nfs4_exception exception = { };
8071 int err;
8072
8073 do {
8074 err = nfs4_handle_exception(server,
8075 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8076 &exception);
8077 } while (exception.retry);
8078 return err;
8079}
8080EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8081
8082static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8083{
8084 struct nfs4_layoutcommit_data *data = calldata;
8085 struct nfs_server *server = NFS_SERVER(data->args.inode);
8086 struct nfs4_session *session = nfs4_get_session(server);
8087
8088 nfs41_setup_sequence(session,
8089 &data->args.seq_args,
8090 &data->res.seq_res,
8091 task);
8092}
8093
8094static void
8095nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8096{
8097 struct nfs4_layoutcommit_data *data = calldata;
8098 struct nfs_server *server = NFS_SERVER(data->args.inode);
8099
8100 if (!nfs41_sequence_done(task, &data->res.seq_res))
8101 return;
8102
8103 switch (task->tk_status) { /* Just ignore these failures */
8104 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8105 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8106 case -NFS4ERR_BADLAYOUT: /* no layout */
8107 case -NFS4ERR_GRACE: /* loca_recalim always false */
8108 task->tk_status = 0;
8109 case 0:
8110 break;
8111 default:
8112 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8113 rpc_restart_call_prepare(task);
8114 return;
8115 }
8116 }
8117}
8118
8119static void nfs4_layoutcommit_release(void *calldata)
8120{
8121 struct nfs4_layoutcommit_data *data = calldata;
8122
8123 pnfs_cleanup_layoutcommit(data);
8124 nfs_post_op_update_inode_force_wcc(data->args.inode,
8125 data->res.fattr);
8126 put_rpccred(data->cred);
8127 nfs_iput_and_deactive(data->inode);
8128 kfree(data);
8129}
8130
8131static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8132 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8133 .rpc_call_done = nfs4_layoutcommit_done,
8134 .rpc_release = nfs4_layoutcommit_release,
8135};
8136
8137int
8138nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8139{
8140 struct rpc_message msg = {
8141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8142 .rpc_argp = &data->args,
8143 .rpc_resp = &data->res,
8144 .rpc_cred = data->cred,
8145 };
8146 struct rpc_task_setup task_setup_data = {
8147 .task = &data->task,
8148 .rpc_client = NFS_CLIENT(data->args.inode),
8149 .rpc_message = &msg,
8150 .callback_ops = &nfs4_layoutcommit_ops,
8151 .callback_data = data,
8152 };
8153 struct rpc_task *task;
8154 int status = 0;
8155
8156 dprintk("NFS: initiating layoutcommit call. sync %d "
8157 "lbw: %llu inode %lu\n", sync,
8158 data->args.lastbytewritten,
8159 data->args.inode->i_ino);
8160
8161 if (!sync) {
8162 data->inode = nfs_igrab_and_active(data->args.inode);
8163 if (data->inode == NULL) {
8164 nfs4_layoutcommit_release(data);
8165 return -EAGAIN;
8166 }
8167 task_setup_data.flags = RPC_TASK_ASYNC;
8168 }
8169 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8170 task = rpc_run_task(&task_setup_data);
8171 if (IS_ERR(task))
8172 return PTR_ERR(task);
8173 if (sync)
8174 status = task->tk_status;
8175 trace_nfs4_layoutcommit(data->args.inode, status);
8176 dprintk("%s: status %d\n", __func__, status);
8177 rpc_put_task(task);
8178 return status;
8179}
8180
8181/**
8182 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8183 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8184 */
8185static int
8186_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8187 struct nfs_fsinfo *info,
8188 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8189{
8190 struct nfs41_secinfo_no_name_args args = {
8191 .style = SECINFO_STYLE_CURRENT_FH,
8192 };
8193 struct nfs4_secinfo_res res = {
8194 .flavors = flavors,
8195 };
8196 struct rpc_message msg = {
8197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8198 .rpc_argp = &args,
8199 .rpc_resp = &res,
8200 };
8201 struct rpc_clnt *clnt = server->client;
8202 struct rpc_cred *cred = NULL;
8203 int status;
8204
8205 if (use_integrity) {
8206 clnt = server->nfs_client->cl_rpcclient;
8207 cred = nfs4_get_clid_cred(server->nfs_client);
8208 msg.rpc_cred = cred;
8209 }
8210
8211 dprintk("--> %s\n", __func__);
8212 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8213 &res.seq_res, 0);
8214 dprintk("<-- %s status=%d\n", __func__, status);
8215
8216 if (cred)
8217 put_rpccred(cred);
8218
8219 return status;
8220}
8221
8222static int
8223nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8224 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8225{
8226 struct nfs4_exception exception = { };
8227 int err;
8228 do {
8229 /* first try using integrity protection */
8230 err = -NFS4ERR_WRONGSEC;
8231
8232 /* try to use integrity protection with machine cred */
8233 if (_nfs4_is_integrity_protected(server->nfs_client))
8234 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8235 flavors, true);
8236
8237 /*
8238 * if unable to use integrity protection, or SECINFO with
8239 * integrity protection returns NFS4ERR_WRONGSEC (which is
8240 * disallowed by spec, but exists in deployed servers) use
8241 * the current filesystem's rpc_client and the user cred.
8242 */
8243 if (err == -NFS4ERR_WRONGSEC)
8244 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8245 flavors, false);
8246
8247 switch (err) {
8248 case 0:
8249 case -NFS4ERR_WRONGSEC:
8250 case -ENOTSUPP:
8251 goto out;
8252 default:
8253 err = nfs4_handle_exception(server, err, &exception);
8254 }
8255 } while (exception.retry);
8256out:
8257 return err;
8258}
8259
8260static int
8261nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8262 struct nfs_fsinfo *info)
8263{
8264 int err;
8265 struct page *page;
8266 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8267 struct nfs4_secinfo_flavors *flavors;
8268 struct nfs4_secinfo4 *secinfo;
8269 int i;
8270
8271 page = alloc_page(GFP_KERNEL);
8272 if (!page) {
8273 err = -ENOMEM;
8274 goto out;
8275 }
8276
8277 flavors = page_address(page);
8278 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8279
8280 /*
8281 * Fall back on "guess and check" method if
8282 * the server doesn't support SECINFO_NO_NAME
8283 */
8284 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8285 err = nfs4_find_root_sec(server, fhandle, info);
8286 goto out_freepage;
8287 }
8288 if (err)
8289 goto out_freepage;
8290
8291 for (i = 0; i < flavors->num_flavors; i++) {
8292 secinfo = &flavors->flavors[i];
8293
8294 switch (secinfo->flavor) {
8295 case RPC_AUTH_NULL:
8296 case RPC_AUTH_UNIX:
8297 case RPC_AUTH_GSS:
8298 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8299 &secinfo->flavor_info);
8300 break;
8301 default:
8302 flavor = RPC_AUTH_MAXFLAVOR;
8303 break;
8304 }
8305
8306 if (!nfs_auth_info_match(&server->auth_info, flavor))
8307 flavor = RPC_AUTH_MAXFLAVOR;
8308
8309 if (flavor != RPC_AUTH_MAXFLAVOR) {
8310 err = nfs4_lookup_root_sec(server, fhandle,
8311 info, flavor);
8312 if (!err)
8313 break;
8314 }
8315 }
8316
8317 if (flavor == RPC_AUTH_MAXFLAVOR)
8318 err = -EPERM;
8319
8320out_freepage:
8321 put_page(page);
8322 if (err == -EACCES)
8323 return -EPERM;
8324out:
8325 return err;
8326}
8327
8328static int _nfs41_test_stateid(struct nfs_server *server,
8329 nfs4_stateid *stateid,
8330 struct rpc_cred *cred)
8331{
8332 int status;
8333 struct nfs41_test_stateid_args args = {
8334 .stateid = stateid,
8335 };
8336 struct nfs41_test_stateid_res res;
8337 struct rpc_message msg = {
8338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8339 .rpc_argp = &args,
8340 .rpc_resp = &res,
8341 .rpc_cred = cred,
8342 };
8343 struct rpc_clnt *rpc_client = server->client;
8344
8345 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8346 &rpc_client, &msg);
8347
8348 dprintk("NFS call test_stateid %p\n", stateid);
8349 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8350 nfs4_set_sequence_privileged(&args.seq_args);
8351 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8352 &args.seq_args, &res.seq_res);
8353 if (status != NFS_OK) {
8354 dprintk("NFS reply test_stateid: failed, %d\n", status);
8355 return status;
8356 }
8357 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8358 return -res.status;
8359}
8360
8361/**
8362 * nfs41_test_stateid - perform a TEST_STATEID operation
8363 *
8364 * @server: server / transport on which to perform the operation
8365 * @stateid: state ID to test
8366 * @cred: credential
8367 *
8368 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8369 * Otherwise a negative NFS4ERR value is returned if the operation
8370 * failed or the state ID is not currently valid.
8371 */
8372static int nfs41_test_stateid(struct nfs_server *server,
8373 nfs4_stateid *stateid,
8374 struct rpc_cred *cred)
8375{
8376 struct nfs4_exception exception = { };
8377 int err;
8378 do {
8379 err = _nfs41_test_stateid(server, stateid, cred);
8380 if (err != -NFS4ERR_DELAY)
8381 break;
8382 nfs4_handle_exception(server, err, &exception);
8383 } while (exception.retry);
8384 return err;
8385}
8386
8387struct nfs_free_stateid_data {
8388 struct nfs_server *server;
8389 struct nfs41_free_stateid_args args;
8390 struct nfs41_free_stateid_res res;
8391};
8392
8393static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8394{
8395 struct nfs_free_stateid_data *data = calldata;
8396 nfs41_setup_sequence(nfs4_get_session(data->server),
8397 &data->args.seq_args,
8398 &data->res.seq_res,
8399 task);
8400}
8401
8402static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8403{
8404 struct nfs_free_stateid_data *data = calldata;
8405
8406 nfs41_sequence_done(task, &data->res.seq_res);
8407
8408 switch (task->tk_status) {
8409 case -NFS4ERR_DELAY:
8410 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8411 rpc_restart_call_prepare(task);
8412 }
8413}
8414
8415static void nfs41_free_stateid_release(void *calldata)
8416{
8417 kfree(calldata);
8418}
8419
8420static const struct rpc_call_ops nfs41_free_stateid_ops = {
8421 .rpc_call_prepare = nfs41_free_stateid_prepare,
8422 .rpc_call_done = nfs41_free_stateid_done,
8423 .rpc_release = nfs41_free_stateid_release,
8424};
8425
8426static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8427 nfs4_stateid *stateid,
8428 struct rpc_cred *cred,
8429 bool privileged)
8430{
8431 struct rpc_message msg = {
8432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8433 .rpc_cred = cred,
8434 };
8435 struct rpc_task_setup task_setup = {
8436 .rpc_client = server->client,
8437 .rpc_message = &msg,
8438 .callback_ops = &nfs41_free_stateid_ops,
8439 .flags = RPC_TASK_ASYNC,
8440 };
8441 struct nfs_free_stateid_data *data;
8442
8443 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8444 &task_setup.rpc_client, &msg);
8445
8446 dprintk("NFS call free_stateid %p\n", stateid);
8447 data = kmalloc(sizeof(*data), GFP_NOFS);
8448 if (!data)
8449 return ERR_PTR(-ENOMEM);
8450 data->server = server;
8451 nfs4_stateid_copy(&data->args.stateid, stateid);
8452
8453 task_setup.callback_data = data;
8454
8455 msg.rpc_argp = &data->args;
8456 msg.rpc_resp = &data->res;
8457 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8458 if (privileged)
8459 nfs4_set_sequence_privileged(&data->args.seq_args);
8460
8461 return rpc_run_task(&task_setup);
8462}
8463
8464/**
8465 * nfs41_free_stateid - perform a FREE_STATEID operation
8466 *
8467 * @server: server / transport on which to perform the operation
8468 * @stateid: state ID to release
8469 * @cred: credential
8470 *
8471 * Returns NFS_OK if the server freed "stateid". Otherwise a
8472 * negative NFS4ERR value is returned.
8473 */
8474static int nfs41_free_stateid(struct nfs_server *server,
8475 nfs4_stateid *stateid,
8476 struct rpc_cred *cred)
8477{
8478 struct rpc_task *task;
8479 int ret;
8480
8481 task = _nfs41_free_stateid(server, stateid, cred, true);
8482 if (IS_ERR(task))
8483 return PTR_ERR(task);
8484 ret = rpc_wait_for_completion_task(task);
8485 if (!ret)
8486 ret = task->tk_status;
8487 rpc_put_task(task);
8488 return ret;
8489}
8490
8491static void
8492nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8493{
8494 struct rpc_task *task;
8495 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8496
8497 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8498 nfs4_free_lock_state(server, lsp);
8499 if (IS_ERR(task))
8500 return;
8501 rpc_put_task(task);
8502}
8503
8504static bool nfs41_match_stateid(const nfs4_stateid *s1,
8505 const nfs4_stateid *s2)
8506{
8507 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8508 return false;
8509
8510 if (s1->seqid == s2->seqid)
8511 return true;
8512 if (s1->seqid == 0 || s2->seqid == 0)
8513 return true;
8514
8515 return false;
8516}
8517
8518#endif /* CONFIG_NFS_V4_1 */
8519
8520static bool nfs4_match_stateid(const nfs4_stateid *s1,
8521 const nfs4_stateid *s2)
8522{
8523 return nfs4_stateid_match(s1, s2);
8524}
8525
8526
8527static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8528 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8529 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8530 .recover_open = nfs4_open_reclaim,
8531 .recover_lock = nfs4_lock_reclaim,
8532 .establish_clid = nfs4_init_clientid,
8533 .detect_trunking = nfs40_discover_server_trunking,
8534};
8535
8536#if defined(CONFIG_NFS_V4_1)
8537static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8538 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8539 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8540 .recover_open = nfs4_open_reclaim,
8541 .recover_lock = nfs4_lock_reclaim,
8542 .establish_clid = nfs41_init_clientid,
8543 .reclaim_complete = nfs41_proc_reclaim_complete,
8544 .detect_trunking = nfs41_discover_server_trunking,
8545};
8546#endif /* CONFIG_NFS_V4_1 */
8547
8548static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8549 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8550 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8551 .recover_open = nfs40_open_expired,
8552 .recover_lock = nfs4_lock_expired,
8553 .establish_clid = nfs4_init_clientid,
8554};
8555
8556#if defined(CONFIG_NFS_V4_1)
8557static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8558 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8559 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8560 .recover_open = nfs41_open_expired,
8561 .recover_lock = nfs41_lock_expired,
8562 .establish_clid = nfs41_init_clientid,
8563};
8564#endif /* CONFIG_NFS_V4_1 */
8565
8566static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8567 .sched_state_renewal = nfs4_proc_async_renew,
8568 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8569 .renew_lease = nfs4_proc_renew,
8570};
8571
8572#if defined(CONFIG_NFS_V4_1)
8573static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8574 .sched_state_renewal = nfs41_proc_async_sequence,
8575 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8576 .renew_lease = nfs4_proc_sequence,
8577};
8578#endif
8579
8580static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8581 .get_locations = _nfs40_proc_get_locations,
8582 .fsid_present = _nfs40_proc_fsid_present,
8583};
8584
8585#if defined(CONFIG_NFS_V4_1)
8586static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8587 .get_locations = _nfs41_proc_get_locations,
8588 .fsid_present = _nfs41_proc_fsid_present,
8589};
8590#endif /* CONFIG_NFS_V4_1 */
8591
8592static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8593 .minor_version = 0,
8594 .init_caps = NFS_CAP_READDIRPLUS
8595 | NFS_CAP_ATOMIC_OPEN
8596 | NFS_CAP_POSIX_LOCK,
8597 .init_client = nfs40_init_client,
8598 .shutdown_client = nfs40_shutdown_client,
8599 .match_stateid = nfs4_match_stateid,
8600 .find_root_sec = nfs4_find_root_sec,
8601 .free_lock_state = nfs4_release_lockowner,
8602 .alloc_seqid = nfs_alloc_seqid,
8603 .call_sync_ops = &nfs40_call_sync_ops,
8604 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8605 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8606 .state_renewal_ops = &nfs40_state_renewal_ops,
8607 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8608};
8609
8610#if defined(CONFIG_NFS_V4_1)
8611static struct nfs_seqid *
8612nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8613{
8614 return NULL;
8615}
8616
8617static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8618 .minor_version = 1,
8619 .init_caps = NFS_CAP_READDIRPLUS
8620 | NFS_CAP_ATOMIC_OPEN
8621 | NFS_CAP_POSIX_LOCK
8622 | NFS_CAP_STATEID_NFSV41
8623 | NFS_CAP_ATOMIC_OPEN_V1,
8624 .init_client = nfs41_init_client,
8625 .shutdown_client = nfs41_shutdown_client,
8626 .match_stateid = nfs41_match_stateid,
8627 .find_root_sec = nfs41_find_root_sec,
8628 .free_lock_state = nfs41_free_lock_state,
8629 .alloc_seqid = nfs_alloc_no_seqid,
8630 .call_sync_ops = &nfs41_call_sync_ops,
8631 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8632 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8633 .state_renewal_ops = &nfs41_state_renewal_ops,
8634 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8635};
8636#endif
8637
8638#if defined(CONFIG_NFS_V4_2)
8639static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8640 .minor_version = 2,
8641 .init_caps = NFS_CAP_READDIRPLUS
8642 | NFS_CAP_ATOMIC_OPEN
8643 | NFS_CAP_POSIX_LOCK
8644 | NFS_CAP_STATEID_NFSV41
8645 | NFS_CAP_ATOMIC_OPEN_V1
8646 | NFS_CAP_ALLOCATE
8647 | NFS_CAP_DEALLOCATE
8648 | NFS_CAP_SEEK
8649 | NFS_CAP_LAYOUTSTATS,
8650 .init_client = nfs41_init_client,
8651 .shutdown_client = nfs41_shutdown_client,
8652 .match_stateid = nfs41_match_stateid,
8653 .find_root_sec = nfs41_find_root_sec,
8654 .free_lock_state = nfs41_free_lock_state,
8655 .call_sync_ops = &nfs41_call_sync_ops,
8656 .alloc_seqid = nfs_alloc_no_seqid,
8657 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8658 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8659 .state_renewal_ops = &nfs41_state_renewal_ops,
8660 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8661};
8662#endif
8663
8664const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8665 [0] = &nfs_v4_0_minor_ops,
8666#if defined(CONFIG_NFS_V4_1)
8667 [1] = &nfs_v4_1_minor_ops,
8668#endif
8669#if defined(CONFIG_NFS_V4_2)
8670 [2] = &nfs_v4_2_minor_ops,
8671#endif
8672};
8673
8674static const struct inode_operations nfs4_dir_inode_operations = {
8675 .create = nfs_create,
8676 .lookup = nfs_lookup,
8677 .atomic_open = nfs_atomic_open,
8678 .link = nfs_link,
8679 .unlink = nfs_unlink,
8680 .symlink = nfs_symlink,
8681 .mkdir = nfs_mkdir,
8682 .rmdir = nfs_rmdir,
8683 .mknod = nfs_mknod,
8684 .rename = nfs_rename,
8685 .permission = nfs_permission,
8686 .getattr = nfs_getattr,
8687 .setattr = nfs_setattr,
8688 .getxattr = generic_getxattr,
8689 .setxattr = generic_setxattr,
8690 .listxattr = generic_listxattr,
8691 .removexattr = generic_removexattr,
8692};
8693
8694static const struct inode_operations nfs4_file_inode_operations = {
8695 .permission = nfs_permission,
8696 .getattr = nfs_getattr,
8697 .setattr = nfs_setattr,
8698 .getxattr = generic_getxattr,
8699 .setxattr = generic_setxattr,
8700 .listxattr = generic_listxattr,
8701 .removexattr = generic_removexattr,
8702};
8703
8704const struct nfs_rpc_ops nfs_v4_clientops = {
8705 .version = 4, /* protocol version */
8706 .dentry_ops = &nfs4_dentry_operations,
8707 .dir_inode_ops = &nfs4_dir_inode_operations,
8708 .file_inode_ops = &nfs4_file_inode_operations,
8709 .file_ops = &nfs4_file_operations,
8710 .getroot = nfs4_proc_get_root,
8711 .submount = nfs4_submount,
8712 .try_mount = nfs4_try_mount,
8713 .getattr = nfs4_proc_getattr,
8714 .setattr = nfs4_proc_setattr,
8715 .lookup = nfs4_proc_lookup,
8716 .access = nfs4_proc_access,
8717 .readlink = nfs4_proc_readlink,
8718 .create = nfs4_proc_create,
8719 .remove = nfs4_proc_remove,
8720 .unlink_setup = nfs4_proc_unlink_setup,
8721 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8722 .unlink_done = nfs4_proc_unlink_done,
8723 .rename_setup = nfs4_proc_rename_setup,
8724 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8725 .rename_done = nfs4_proc_rename_done,
8726 .link = nfs4_proc_link,
8727 .symlink = nfs4_proc_symlink,
8728 .mkdir = nfs4_proc_mkdir,
8729 .rmdir = nfs4_proc_remove,
8730 .readdir = nfs4_proc_readdir,
8731 .mknod = nfs4_proc_mknod,
8732 .statfs = nfs4_proc_statfs,
8733 .fsinfo = nfs4_proc_fsinfo,
8734 .pathconf = nfs4_proc_pathconf,
8735 .set_capabilities = nfs4_server_capabilities,
8736 .decode_dirent = nfs4_decode_dirent,
8737 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8738 .read_setup = nfs4_proc_read_setup,
8739 .read_done = nfs4_read_done,
8740 .write_setup = nfs4_proc_write_setup,
8741 .write_done = nfs4_write_done,
8742 .commit_setup = nfs4_proc_commit_setup,
8743 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8744 .commit_done = nfs4_commit_done,
8745 .lock = nfs4_proc_lock,
8746 .clear_acl_cache = nfs4_zap_acl_attr,
8747 .close_context = nfs4_close_context,
8748 .open_context = nfs4_atomic_open,
8749 .have_delegation = nfs4_have_delegation,
8750 .return_delegation = nfs4_inode_return_delegation,
8751 .alloc_client = nfs4_alloc_client,
8752 .init_client = nfs4_init_client,
8753 .free_client = nfs4_free_client,
8754 .create_server = nfs4_create_server,
8755 .clone_server = nfs_clone_server,
8756};
8757
8758static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8759 .prefix = XATTR_NAME_NFSV4_ACL,
8760 .list = nfs4_xattr_list_nfs4_acl,
8761 .get = nfs4_xattr_get_nfs4_acl,
8762 .set = nfs4_xattr_set_nfs4_acl,
8763};
8764
8765const struct xattr_handler *nfs4_xattr_handlers[] = {
8766 &nfs4_xattr_nfs4_acl_handler,
8767#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8768 &nfs4_xattr_nfs4_label_handler,
8769#endif
8770 NULL
8771};
8772
8773/*
8774 * Local variables:
8775 * c-basic-offset: 8
8776 * End:
8777 */
Linux 6.x block layer and io_uring tree(s)