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NFSv4: Don't try to reclaim unused state owners
[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 bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1131 fmode_t fmode)
1132{
1133 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1134 case FMODE_READ|FMODE_WRITE:
1135 return state->n_rdwr != 0;
1136 case FMODE_WRITE:
1137 return state->n_wronly != 0;
1138 case FMODE_READ:
1139 return state->n_rdonly != 0;
1140 }
1141 WARN_ON_ONCE(1);
1142 return false;
1143}
1144
1145static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1146{
1147 int ret = 0;
1148
1149 if (open_mode & (O_EXCL|O_TRUNC))
1150 goto out;
1151 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1152 case FMODE_READ:
1153 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1154 && state->n_rdonly != 0;
1155 break;
1156 case FMODE_WRITE:
1157 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1158 && state->n_wronly != 0;
1159 break;
1160 case FMODE_READ|FMODE_WRITE:
1161 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1162 && state->n_rdwr != 0;
1163 }
1164out:
1165 return ret;
1166}
1167
1168static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1169 enum open_claim_type4 claim)
1170{
1171 if (delegation == NULL)
1172 return 0;
1173 if ((delegation->type & fmode) != fmode)
1174 return 0;
1175 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1176 return 0;
1177 switch (claim) {
1178 case NFS4_OPEN_CLAIM_NULL:
1179 case NFS4_OPEN_CLAIM_FH:
1180 break;
1181 case NFS4_OPEN_CLAIM_PREVIOUS:
1182 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1183 break;
1184 default:
1185 return 0;
1186 }
1187 nfs_mark_delegation_referenced(delegation);
1188 return 1;
1189}
1190
1191static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1192{
1193 switch (fmode) {
1194 case FMODE_WRITE:
1195 state->n_wronly++;
1196 break;
1197 case FMODE_READ:
1198 state->n_rdonly++;
1199 break;
1200 case FMODE_READ|FMODE_WRITE:
1201 state->n_rdwr++;
1202 }
1203 nfs4_state_set_mode_locked(state, state->state | fmode);
1204}
1205
1206static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1207{
1208 struct nfs_client *clp = state->owner->so_server->nfs_client;
1209 bool need_recover = false;
1210
1211 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1212 need_recover = true;
1213 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1214 need_recover = true;
1215 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1216 need_recover = true;
1217 if (need_recover)
1218 nfs4_state_mark_reclaim_nograce(clp, state);
1219}
1220
1221static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1222 nfs4_stateid *stateid)
1223{
1224 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1225 return true;
1226 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1227 nfs_test_and_clear_all_open_stateid(state);
1228 return true;
1229 }
1230 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1231 return true;
1232 return false;
1233}
1234
1235static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1236{
1237 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1238 return;
1239 if (state->n_wronly)
1240 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1241 if (state->n_rdonly)
1242 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1243 if (state->n_rdwr)
1244 set_bit(NFS_O_RDWR_STATE, &state->flags);
1245 set_bit(NFS_OPEN_STATE, &state->flags);
1246}
1247
1248static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1249 nfs4_stateid *arg_stateid,
1250 nfs4_stateid *stateid, fmode_t fmode)
1251{
1252 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1253 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1254 case FMODE_WRITE:
1255 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1256 break;
1257 case FMODE_READ:
1258 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1259 break;
1260 case 0:
1261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1263 clear_bit(NFS_OPEN_STATE, &state->flags);
1264 }
1265 if (stateid == NULL)
1266 return;
1267 /* Handle races with OPEN */
1268 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1269 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1270 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
1271 nfs_resync_open_stateid_locked(state);
1272 return;
1273 }
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 nfs_clear_open_stateid(struct nfs4_state *state,
1280 nfs4_stateid *arg_stateid,
1281 nfs4_stateid *stateid, fmode_t fmode)
1282{
1283 write_seqlock(&state->seqlock);
1284 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
1285 write_sequnlock(&state->seqlock);
1286 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1287 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1288}
1289
1290static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1291{
1292 switch (fmode) {
1293 case FMODE_READ:
1294 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1295 break;
1296 case FMODE_WRITE:
1297 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1298 break;
1299 case FMODE_READ|FMODE_WRITE:
1300 set_bit(NFS_O_RDWR_STATE, &state->flags);
1301 }
1302 if (!nfs_need_update_open_stateid(state, stateid))
1303 return;
1304 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1305 nfs4_stateid_copy(&state->stateid, stateid);
1306 nfs4_stateid_copy(&state->open_stateid, stateid);
1307}
1308
1309static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1310{
1311 /*
1312 * Protect the call to nfs4_state_set_mode_locked and
1313 * serialise the stateid update
1314 */
1315 write_seqlock(&state->seqlock);
1316 if (deleg_stateid != NULL) {
1317 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1318 set_bit(NFS_DELEGATED_STATE, &state->flags);
1319 }
1320 if (open_stateid != NULL)
1321 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1322 write_sequnlock(&state->seqlock);
1323 spin_lock(&state->owner->so_lock);
1324 update_open_stateflags(state, fmode);
1325 spin_unlock(&state->owner->so_lock);
1326}
1327
1328static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1329{
1330 struct nfs_inode *nfsi = NFS_I(state->inode);
1331 struct nfs_delegation *deleg_cur;
1332 int ret = 0;
1333
1334 fmode &= (FMODE_READ|FMODE_WRITE);
1335
1336 rcu_read_lock();
1337 deleg_cur = rcu_dereference(nfsi->delegation);
1338 if (deleg_cur == NULL)
1339 goto no_delegation;
1340
1341 spin_lock(&deleg_cur->lock);
1342 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1343 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1344 (deleg_cur->type & fmode) != fmode)
1345 goto no_delegation_unlock;
1346
1347 if (delegation == NULL)
1348 delegation = &deleg_cur->stateid;
1349 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1350 goto no_delegation_unlock;
1351
1352 nfs_mark_delegation_referenced(deleg_cur);
1353 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1354 ret = 1;
1355no_delegation_unlock:
1356 spin_unlock(&deleg_cur->lock);
1357no_delegation:
1358 rcu_read_unlock();
1359
1360 if (!ret && open_stateid != NULL) {
1361 __update_open_stateid(state, open_stateid, NULL, fmode);
1362 ret = 1;
1363 }
1364 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1365 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1366
1367 return ret;
1368}
1369
1370static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1371 const nfs4_stateid *stateid)
1372{
1373 struct nfs4_state *state = lsp->ls_state;
1374 bool ret = false;
1375
1376 spin_lock(&state->state_lock);
1377 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1378 goto out_noupdate;
1379 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1380 goto out_noupdate;
1381 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1382 ret = true;
1383out_noupdate:
1384 spin_unlock(&state->state_lock);
1385 return ret;
1386}
1387
1388static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1389{
1390 struct nfs_delegation *delegation;
1391
1392 rcu_read_lock();
1393 delegation = rcu_dereference(NFS_I(inode)->delegation);
1394 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1395 rcu_read_unlock();
1396 return;
1397 }
1398 rcu_read_unlock();
1399 nfs4_inode_return_delegation(inode);
1400}
1401
1402static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1403{
1404 struct nfs4_state *state = opendata->state;
1405 struct nfs_inode *nfsi = NFS_I(state->inode);
1406 struct nfs_delegation *delegation;
1407 int open_mode = opendata->o_arg.open_flags;
1408 fmode_t fmode = opendata->o_arg.fmode;
1409 enum open_claim_type4 claim = opendata->o_arg.claim;
1410 nfs4_stateid stateid;
1411 int ret = -EAGAIN;
1412
1413 for (;;) {
1414 spin_lock(&state->owner->so_lock);
1415 if (can_open_cached(state, fmode, open_mode)) {
1416 update_open_stateflags(state, fmode);
1417 spin_unlock(&state->owner->so_lock);
1418 goto out_return_state;
1419 }
1420 spin_unlock(&state->owner->so_lock);
1421 rcu_read_lock();
1422 delegation = rcu_dereference(nfsi->delegation);
1423 if (!can_open_delegated(delegation, fmode, claim)) {
1424 rcu_read_unlock();
1425 break;
1426 }
1427 /* Save the delegation */
1428 nfs4_stateid_copy(&stateid, &delegation->stateid);
1429 rcu_read_unlock();
1430 nfs_release_seqid(opendata->o_arg.seqid);
1431 if (!opendata->is_recover) {
1432 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1433 if (ret != 0)
1434 goto out;
1435 }
1436 ret = -EAGAIN;
1437
1438 /* Try to update the stateid using the delegation */
1439 if (update_open_stateid(state, NULL, &stateid, fmode))
1440 goto out_return_state;
1441 }
1442out:
1443 return ERR_PTR(ret);
1444out_return_state:
1445 atomic_inc(&state->count);
1446 return state;
1447}
1448
1449static void
1450nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1451{
1452 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1453 struct nfs_delegation *delegation;
1454 int delegation_flags = 0;
1455
1456 rcu_read_lock();
1457 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1458 if (delegation)
1459 delegation_flags = delegation->flags;
1460 rcu_read_unlock();
1461 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1462 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1463 "returning a delegation for "
1464 "OPEN(CLAIM_DELEGATE_CUR)\n",
1465 clp->cl_hostname);
1466 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1467 nfs_inode_set_delegation(state->inode,
1468 data->owner->so_cred,
1469 &data->o_res);
1470 else
1471 nfs_inode_reclaim_delegation(state->inode,
1472 data->owner->so_cred,
1473 &data->o_res);
1474}
1475
1476/*
1477 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1478 * and update the nfs4_state.
1479 */
1480static struct nfs4_state *
1481_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1482{
1483 struct inode *inode = data->state->inode;
1484 struct nfs4_state *state = data->state;
1485 int ret;
1486
1487 if (!data->rpc_done) {
1488 if (data->rpc_status) {
1489 ret = data->rpc_status;
1490 goto err;
1491 }
1492 /* cached opens have already been processed */
1493 goto update;
1494 }
1495
1496 ret = nfs_refresh_inode(inode, &data->f_attr);
1497 if (ret)
1498 goto err;
1499
1500 if (data->o_res.delegation_type != 0)
1501 nfs4_opendata_check_deleg(data, state);
1502update:
1503 update_open_stateid(state, &data->o_res.stateid, NULL,
1504 data->o_arg.fmode);
1505 atomic_inc(&state->count);
1506
1507 return state;
1508err:
1509 return ERR_PTR(ret);
1510
1511}
1512
1513static struct nfs4_state *
1514_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1515{
1516 struct inode *inode;
1517 struct nfs4_state *state = NULL;
1518 int ret;
1519
1520 if (!data->rpc_done) {
1521 state = nfs4_try_open_cached(data);
1522 goto out;
1523 }
1524
1525 ret = -EAGAIN;
1526 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1527 goto err;
1528 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1529 ret = PTR_ERR(inode);
1530 if (IS_ERR(inode))
1531 goto err;
1532 ret = -ENOMEM;
1533 state = nfs4_get_open_state(inode, data->owner);
1534 if (state == NULL)
1535 goto err_put_inode;
1536 if (data->o_res.delegation_type != 0)
1537 nfs4_opendata_check_deleg(data, state);
1538 update_open_stateid(state, &data->o_res.stateid, NULL,
1539 data->o_arg.fmode);
1540 iput(inode);
1541out:
1542 nfs_release_seqid(data->o_arg.seqid);
1543 return state;
1544err_put_inode:
1545 iput(inode);
1546err:
1547 return ERR_PTR(ret);
1548}
1549
1550static struct nfs4_state *
1551nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1552{
1553 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1554 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1555 return _nfs4_opendata_to_nfs4_state(data);
1556}
1557
1558static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1559{
1560 struct nfs_inode *nfsi = NFS_I(state->inode);
1561 struct nfs_open_context *ctx;
1562
1563 spin_lock(&state->inode->i_lock);
1564 list_for_each_entry(ctx, &nfsi->open_files, list) {
1565 if (ctx->state != state)
1566 continue;
1567 get_nfs_open_context(ctx);
1568 spin_unlock(&state->inode->i_lock);
1569 return ctx;
1570 }
1571 spin_unlock(&state->inode->i_lock);
1572 return ERR_PTR(-ENOENT);
1573}
1574
1575static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1576 struct nfs4_state *state, enum open_claim_type4 claim)
1577{
1578 struct nfs4_opendata *opendata;
1579
1580 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1581 NULL, NULL, claim, GFP_NOFS);
1582 if (opendata == NULL)
1583 return ERR_PTR(-ENOMEM);
1584 opendata->state = state;
1585 atomic_inc(&state->count);
1586 return opendata;
1587}
1588
1589static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1590 fmode_t fmode)
1591{
1592 struct nfs4_state *newstate;
1593 int ret;
1594
1595 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1596 return 0;
1597 opendata->o_arg.open_flags = 0;
1598 opendata->o_arg.fmode = fmode;
1599 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1600 NFS_SB(opendata->dentry->d_sb),
1601 fmode, 0);
1602 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1603 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1604 nfs4_init_opendata_res(opendata);
1605 ret = _nfs4_recover_proc_open(opendata);
1606 if (ret != 0)
1607 return ret;
1608 newstate = nfs4_opendata_to_nfs4_state(opendata);
1609 if (IS_ERR(newstate))
1610 return PTR_ERR(newstate);
1611 if (newstate != opendata->state)
1612 ret = -ESTALE;
1613 nfs4_close_state(newstate, fmode);
1614 return ret;
1615}
1616
1617static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1618{
1619 int ret;
1620
1621 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1622 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1623 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1624 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1625 /* memory barrier prior to reading state->n_* */
1626 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1627 clear_bit(NFS_OPEN_STATE, &state->flags);
1628 smp_rmb();
1629 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1630 if (ret != 0)
1631 return ret;
1632 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1633 if (ret != 0)
1634 return ret;
1635 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1636 if (ret != 0)
1637 return ret;
1638 /*
1639 * We may have performed cached opens for all three recoveries.
1640 * Check if we need to update the current stateid.
1641 */
1642 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1643 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1644 write_seqlock(&state->seqlock);
1645 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1646 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1647 write_sequnlock(&state->seqlock);
1648 }
1649 return 0;
1650}
1651
1652/*
1653 * OPEN_RECLAIM:
1654 * reclaim state on the server after a reboot.
1655 */
1656static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1657{
1658 struct nfs_delegation *delegation;
1659 struct nfs4_opendata *opendata;
1660 fmode_t delegation_type = 0;
1661 int status;
1662
1663 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1664 NFS4_OPEN_CLAIM_PREVIOUS);
1665 if (IS_ERR(opendata))
1666 return PTR_ERR(opendata);
1667 rcu_read_lock();
1668 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1669 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1670 delegation_type = delegation->type;
1671 rcu_read_unlock();
1672 opendata->o_arg.u.delegation_type = delegation_type;
1673 status = nfs4_open_recover(opendata, state);
1674 nfs4_opendata_put(opendata);
1675 return status;
1676}
1677
1678static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1679{
1680 struct nfs_server *server = NFS_SERVER(state->inode);
1681 struct nfs4_exception exception = { };
1682 int err;
1683 do {
1684 err = _nfs4_do_open_reclaim(ctx, state);
1685 trace_nfs4_open_reclaim(ctx, 0, err);
1686 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1687 continue;
1688 if (err != -NFS4ERR_DELAY)
1689 break;
1690 nfs4_handle_exception(server, err, &exception);
1691 } while (exception.retry);
1692 return err;
1693}
1694
1695static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1696{
1697 struct nfs_open_context *ctx;
1698 int ret;
1699
1700 ctx = nfs4_state_find_open_context(state);
1701 if (IS_ERR(ctx))
1702 return -EAGAIN;
1703 ret = nfs4_do_open_reclaim(ctx, state);
1704 put_nfs_open_context(ctx);
1705 return ret;
1706}
1707
1708static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1709{
1710 switch (err) {
1711 default:
1712 printk(KERN_ERR "NFS: %s: unhandled error "
1713 "%d.\n", __func__, err);
1714 case 0:
1715 case -ENOENT:
1716 case -EAGAIN:
1717 case -ESTALE:
1718 break;
1719 case -NFS4ERR_BADSESSION:
1720 case -NFS4ERR_BADSLOT:
1721 case -NFS4ERR_BAD_HIGH_SLOT:
1722 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1723 case -NFS4ERR_DEADSESSION:
1724 set_bit(NFS_DELEGATED_STATE, &state->flags);
1725 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1726 return -EAGAIN;
1727 case -NFS4ERR_STALE_CLIENTID:
1728 case -NFS4ERR_STALE_STATEID:
1729 set_bit(NFS_DELEGATED_STATE, &state->flags);
1730 case -NFS4ERR_EXPIRED:
1731 /* Don't recall a delegation if it was lost */
1732 nfs4_schedule_lease_recovery(server->nfs_client);
1733 return -EAGAIN;
1734 case -NFS4ERR_MOVED:
1735 nfs4_schedule_migration_recovery(server);
1736 return -EAGAIN;
1737 case -NFS4ERR_LEASE_MOVED:
1738 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1739 return -EAGAIN;
1740 case -NFS4ERR_DELEG_REVOKED:
1741 case -NFS4ERR_ADMIN_REVOKED:
1742 case -NFS4ERR_BAD_STATEID:
1743 case -NFS4ERR_OPENMODE:
1744 nfs_inode_find_state_and_recover(state->inode,
1745 stateid);
1746 nfs4_schedule_stateid_recovery(server, state);
1747 return -EAGAIN;
1748 case -NFS4ERR_DELAY:
1749 case -NFS4ERR_GRACE:
1750 set_bit(NFS_DELEGATED_STATE, &state->flags);
1751 ssleep(1);
1752 return -EAGAIN;
1753 case -ENOMEM:
1754 case -NFS4ERR_DENIED:
1755 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1756 return 0;
1757 }
1758 return err;
1759}
1760
1761int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1762 struct nfs4_state *state, const nfs4_stateid *stateid,
1763 fmode_t type)
1764{
1765 struct nfs_server *server = NFS_SERVER(state->inode);
1766 struct nfs4_opendata *opendata;
1767 int err = 0;
1768
1769 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1770 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1771 if (IS_ERR(opendata))
1772 return PTR_ERR(opendata);
1773 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1774 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1775 switch (type & (FMODE_READ|FMODE_WRITE)) {
1776 case FMODE_READ|FMODE_WRITE:
1777 case FMODE_WRITE:
1778 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1779 if (err)
1780 break;
1781 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1782 if (err)
1783 break;
1784 case FMODE_READ:
1785 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1786 }
1787 nfs4_opendata_put(opendata);
1788 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1789}
1790
1791static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1792{
1793 struct nfs4_opendata *data = calldata;
1794
1795 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1796 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1797}
1798
1799static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1800{
1801 struct nfs4_opendata *data = calldata;
1802
1803 nfs40_sequence_done(task, &data->c_res.seq_res);
1804
1805 data->rpc_status = task->tk_status;
1806 if (data->rpc_status == 0) {
1807 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1808 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1809 renew_lease(data->o_res.server, data->timestamp);
1810 data->rpc_done = 1;
1811 }
1812}
1813
1814static void nfs4_open_confirm_release(void *calldata)
1815{
1816 struct nfs4_opendata *data = calldata;
1817 struct nfs4_state *state = NULL;
1818
1819 /* If this request hasn't been cancelled, do nothing */
1820 if (data->cancelled == 0)
1821 goto out_free;
1822 /* In case of error, no cleanup! */
1823 if (!data->rpc_done)
1824 goto out_free;
1825 state = nfs4_opendata_to_nfs4_state(data);
1826 if (!IS_ERR(state))
1827 nfs4_close_state(state, data->o_arg.fmode);
1828out_free:
1829 nfs4_opendata_put(data);
1830}
1831
1832static const struct rpc_call_ops nfs4_open_confirm_ops = {
1833 .rpc_call_prepare = nfs4_open_confirm_prepare,
1834 .rpc_call_done = nfs4_open_confirm_done,
1835 .rpc_release = nfs4_open_confirm_release,
1836};
1837
1838/*
1839 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1840 */
1841static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1842{
1843 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1844 struct rpc_task *task;
1845 struct rpc_message msg = {
1846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1847 .rpc_argp = &data->c_arg,
1848 .rpc_resp = &data->c_res,
1849 .rpc_cred = data->owner->so_cred,
1850 };
1851 struct rpc_task_setup task_setup_data = {
1852 .rpc_client = server->client,
1853 .rpc_message = &msg,
1854 .callback_ops = &nfs4_open_confirm_ops,
1855 .callback_data = data,
1856 .workqueue = nfsiod_workqueue,
1857 .flags = RPC_TASK_ASYNC,
1858 };
1859 int status;
1860
1861 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1862 kref_get(&data->kref);
1863 data->rpc_done = 0;
1864 data->rpc_status = 0;
1865 data->timestamp = jiffies;
1866 task = rpc_run_task(&task_setup_data);
1867 if (IS_ERR(task))
1868 return PTR_ERR(task);
1869 status = nfs4_wait_for_completion_rpc_task(task);
1870 if (status != 0) {
1871 data->cancelled = 1;
1872 smp_wmb();
1873 } else
1874 status = data->rpc_status;
1875 rpc_put_task(task);
1876 return status;
1877}
1878
1879static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1880{
1881 struct nfs4_opendata *data = calldata;
1882 struct nfs4_state_owner *sp = data->owner;
1883 struct nfs_client *clp = sp->so_server->nfs_client;
1884 enum open_claim_type4 claim = data->o_arg.claim;
1885
1886 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1887 goto out_wait;
1888 /*
1889 * Check if we still need to send an OPEN call, or if we can use
1890 * a delegation instead.
1891 */
1892 if (data->state != NULL) {
1893 struct nfs_delegation *delegation;
1894
1895 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1896 goto out_no_action;
1897 rcu_read_lock();
1898 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1899 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
1900 goto unlock_no_action;
1901 rcu_read_unlock();
1902 }
1903 /* Update client id. */
1904 data->o_arg.clientid = clp->cl_clientid;
1905 switch (claim) {
1906 default:
1907 break;
1908 case NFS4_OPEN_CLAIM_PREVIOUS:
1909 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1910 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1911 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1912 case NFS4_OPEN_CLAIM_FH:
1913 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1914 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1915 }
1916 data->timestamp = jiffies;
1917 if (nfs4_setup_sequence(data->o_arg.server,
1918 &data->o_arg.seq_args,
1919 &data->o_res.seq_res,
1920 task) != 0)
1921 nfs_release_seqid(data->o_arg.seqid);
1922
1923 /* Set the create mode (note dependency on the session type) */
1924 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1925 if (data->o_arg.open_flags & O_EXCL) {
1926 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1927 if (nfs4_has_persistent_session(clp))
1928 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1929 else if (clp->cl_mvops->minor_version > 0)
1930 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1931 }
1932 return;
1933unlock_no_action:
1934 rcu_read_unlock();
1935out_no_action:
1936 task->tk_action = NULL;
1937out_wait:
1938 nfs4_sequence_done(task, &data->o_res.seq_res);
1939}
1940
1941static void nfs4_open_done(struct rpc_task *task, void *calldata)
1942{
1943 struct nfs4_opendata *data = calldata;
1944
1945 data->rpc_status = task->tk_status;
1946
1947 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1948 return;
1949
1950 if (task->tk_status == 0) {
1951 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1952 switch (data->o_res.f_attr->mode & S_IFMT) {
1953 case S_IFREG:
1954 break;
1955 case S_IFLNK:
1956 data->rpc_status = -ELOOP;
1957 break;
1958 case S_IFDIR:
1959 data->rpc_status = -EISDIR;
1960 break;
1961 default:
1962 data->rpc_status = -ENOTDIR;
1963 }
1964 }
1965 renew_lease(data->o_res.server, data->timestamp);
1966 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1967 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1968 }
1969 data->rpc_done = 1;
1970}
1971
1972static void nfs4_open_release(void *calldata)
1973{
1974 struct nfs4_opendata *data = calldata;
1975 struct nfs4_state *state = NULL;
1976
1977 /* If this request hasn't been cancelled, do nothing */
1978 if (data->cancelled == 0)
1979 goto out_free;
1980 /* In case of error, no cleanup! */
1981 if (data->rpc_status != 0 || !data->rpc_done)
1982 goto out_free;
1983 /* In case we need an open_confirm, no cleanup! */
1984 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1985 goto out_free;
1986 state = nfs4_opendata_to_nfs4_state(data);
1987 if (!IS_ERR(state))
1988 nfs4_close_state(state, data->o_arg.fmode);
1989out_free:
1990 nfs4_opendata_put(data);
1991}
1992
1993static const struct rpc_call_ops nfs4_open_ops = {
1994 .rpc_call_prepare = nfs4_open_prepare,
1995 .rpc_call_done = nfs4_open_done,
1996 .rpc_release = nfs4_open_release,
1997};
1998
1999static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2000{
2001 struct inode *dir = d_inode(data->dir);
2002 struct nfs_server *server = NFS_SERVER(dir);
2003 struct nfs_openargs *o_arg = &data->o_arg;
2004 struct nfs_openres *o_res = &data->o_res;
2005 struct rpc_task *task;
2006 struct rpc_message msg = {
2007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2008 .rpc_argp = o_arg,
2009 .rpc_resp = o_res,
2010 .rpc_cred = data->owner->so_cred,
2011 };
2012 struct rpc_task_setup task_setup_data = {
2013 .rpc_client = server->client,
2014 .rpc_message = &msg,
2015 .callback_ops = &nfs4_open_ops,
2016 .callback_data = data,
2017 .workqueue = nfsiod_workqueue,
2018 .flags = RPC_TASK_ASYNC,
2019 };
2020 int status;
2021
2022 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2023 kref_get(&data->kref);
2024 data->rpc_done = 0;
2025 data->rpc_status = 0;
2026 data->cancelled = 0;
2027 data->is_recover = 0;
2028 if (isrecover) {
2029 nfs4_set_sequence_privileged(&o_arg->seq_args);
2030 data->is_recover = 1;
2031 }
2032 task = rpc_run_task(&task_setup_data);
2033 if (IS_ERR(task))
2034 return PTR_ERR(task);
2035 status = nfs4_wait_for_completion_rpc_task(task);
2036 if (status != 0) {
2037 data->cancelled = 1;
2038 smp_wmb();
2039 } else
2040 status = data->rpc_status;
2041 rpc_put_task(task);
2042
2043 return status;
2044}
2045
2046static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2047{
2048 struct inode *dir = d_inode(data->dir);
2049 struct nfs_openres *o_res = &data->o_res;
2050 int status;
2051
2052 status = nfs4_run_open_task(data, 1);
2053 if (status != 0 || !data->rpc_done)
2054 return status;
2055
2056 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2057
2058 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2059 status = _nfs4_proc_open_confirm(data);
2060 if (status != 0)
2061 return status;
2062 }
2063
2064 return status;
2065}
2066
2067/*
2068 * Additional permission checks in order to distinguish between an
2069 * open for read, and an open for execute. This works around the
2070 * fact that NFSv4 OPEN treats read and execute permissions as being
2071 * the same.
2072 * Note that in the non-execute case, we want to turn off permission
2073 * checking if we just created a new file (POSIX open() semantics).
2074 */
2075static int nfs4_opendata_access(struct rpc_cred *cred,
2076 struct nfs4_opendata *opendata,
2077 struct nfs4_state *state, fmode_t fmode,
2078 int openflags)
2079{
2080 struct nfs_access_entry cache;
2081 u32 mask;
2082
2083 /* access call failed or for some reason the server doesn't
2084 * support any access modes -- defer access call until later */
2085 if (opendata->o_res.access_supported == 0)
2086 return 0;
2087
2088 mask = 0;
2089 /*
2090 * Use openflags to check for exec, because fmode won't
2091 * always have FMODE_EXEC set when file open for exec.
2092 */
2093 if (openflags & __FMODE_EXEC) {
2094 /* ONLY check for exec rights */
2095 mask = MAY_EXEC;
2096 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2097 mask = MAY_READ;
2098
2099 cache.cred = cred;
2100 cache.jiffies = jiffies;
2101 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2102 nfs_access_add_cache(state->inode, &cache);
2103
2104 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2105 return 0;
2106
2107 /* even though OPEN succeeded, access is denied. Close the file */
2108 nfs4_close_state(state, fmode);
2109 return -EACCES;
2110}
2111
2112/*
2113 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2114 */
2115static int _nfs4_proc_open(struct nfs4_opendata *data)
2116{
2117 struct inode *dir = d_inode(data->dir);
2118 struct nfs_server *server = NFS_SERVER(dir);
2119 struct nfs_openargs *o_arg = &data->o_arg;
2120 struct nfs_openres *o_res = &data->o_res;
2121 int status;
2122
2123 status = nfs4_run_open_task(data, 0);
2124 if (!data->rpc_done)
2125 return status;
2126 if (status != 0) {
2127 if (status == -NFS4ERR_BADNAME &&
2128 !(o_arg->open_flags & O_CREAT))
2129 return -ENOENT;
2130 return status;
2131 }
2132
2133 nfs_fattr_map_and_free_names(server, &data->f_attr);
2134
2135 if (o_arg->open_flags & O_CREAT) {
2136 update_changeattr(dir, &o_res->cinfo);
2137 if (o_arg->open_flags & O_EXCL)
2138 data->file_created = 1;
2139 else if (o_res->cinfo.before != o_res->cinfo.after)
2140 data->file_created = 1;
2141 }
2142 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2143 server->caps &= ~NFS_CAP_POSIX_LOCK;
2144 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2145 status = _nfs4_proc_open_confirm(data);
2146 if (status != 0)
2147 return status;
2148 }
2149 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2150 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2151 return 0;
2152}
2153
2154static int nfs4_recover_expired_lease(struct nfs_server *server)
2155{
2156 return nfs4_client_recover_expired_lease(server->nfs_client);
2157}
2158
2159/*
2160 * OPEN_EXPIRED:
2161 * reclaim state on the server after a network partition.
2162 * Assumes caller holds the appropriate lock
2163 */
2164static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2165{
2166 struct nfs4_opendata *opendata;
2167 int ret;
2168
2169 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2170 NFS4_OPEN_CLAIM_FH);
2171 if (IS_ERR(opendata))
2172 return PTR_ERR(opendata);
2173 ret = nfs4_open_recover(opendata, state);
2174 if (ret == -ESTALE)
2175 d_drop(ctx->dentry);
2176 nfs4_opendata_put(opendata);
2177 return ret;
2178}
2179
2180static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2181{
2182 struct nfs_server *server = NFS_SERVER(state->inode);
2183 struct nfs4_exception exception = { };
2184 int err;
2185
2186 do {
2187 err = _nfs4_open_expired(ctx, state);
2188 trace_nfs4_open_expired(ctx, 0, err);
2189 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2190 continue;
2191 switch (err) {
2192 default:
2193 goto out;
2194 case -NFS4ERR_GRACE:
2195 case -NFS4ERR_DELAY:
2196 nfs4_handle_exception(server, err, &exception);
2197 err = 0;
2198 }
2199 } while (exception.retry);
2200out:
2201 return err;
2202}
2203
2204static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2205{
2206 struct nfs_open_context *ctx;
2207 int ret;
2208
2209 ctx = nfs4_state_find_open_context(state);
2210 if (IS_ERR(ctx))
2211 return -EAGAIN;
2212 ret = nfs4_do_open_expired(ctx, state);
2213 put_nfs_open_context(ctx);
2214 return ret;
2215}
2216
2217static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2218{
2219 nfs_remove_bad_delegation(state->inode);
2220 write_seqlock(&state->seqlock);
2221 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2222 write_sequnlock(&state->seqlock);
2223 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2224}
2225
2226static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2227{
2228 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2229 nfs_finish_clear_delegation_stateid(state);
2230}
2231
2232static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2233{
2234 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2235 nfs40_clear_delegation_stateid(state);
2236 return nfs4_open_expired(sp, state);
2237}
2238
2239#if defined(CONFIG_NFS_V4_1)
2240static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2241{
2242 struct nfs_server *server = NFS_SERVER(state->inode);
2243 nfs4_stateid stateid;
2244 struct nfs_delegation *delegation;
2245 struct rpc_cred *cred;
2246 int status;
2247
2248 /* Get the delegation credential for use by test/free_stateid */
2249 rcu_read_lock();
2250 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2251 if (delegation == NULL) {
2252 rcu_read_unlock();
2253 return;
2254 }
2255
2256 nfs4_stateid_copy(&stateid, &delegation->stateid);
2257 cred = get_rpccred(delegation->cred);
2258 rcu_read_unlock();
2259 status = nfs41_test_stateid(server, &stateid, cred);
2260 trace_nfs4_test_delegation_stateid(state, NULL, status);
2261
2262 if (status != NFS_OK) {
2263 /* Free the stateid unless the server explicitly
2264 * informs us the stateid is unrecognized. */
2265 if (status != -NFS4ERR_BAD_STATEID)
2266 nfs41_free_stateid(server, &stateid, cred);
2267 nfs_finish_clear_delegation_stateid(state);
2268 }
2269
2270 put_rpccred(cred);
2271}
2272
2273/**
2274 * nfs41_check_open_stateid - possibly free an open stateid
2275 *
2276 * @state: NFSv4 state for an inode
2277 *
2278 * Returns NFS_OK if recovery for this stateid is now finished.
2279 * Otherwise a negative NFS4ERR value is returned.
2280 */
2281static int nfs41_check_open_stateid(struct nfs4_state *state)
2282{
2283 struct nfs_server *server = NFS_SERVER(state->inode);
2284 nfs4_stateid *stateid = &state->open_stateid;
2285 struct rpc_cred *cred = state->owner->so_cred;
2286 int status;
2287
2288 /* If a state reset has been done, test_stateid is unneeded */
2289 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2290 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2291 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2292 return -NFS4ERR_BAD_STATEID;
2293
2294 status = nfs41_test_stateid(server, stateid, cred);
2295 trace_nfs4_test_open_stateid(state, NULL, status);
2296 if (status != NFS_OK) {
2297 /* Free the stateid unless the server explicitly
2298 * informs us the stateid is unrecognized. */
2299 if (status != -NFS4ERR_BAD_STATEID)
2300 nfs41_free_stateid(server, stateid, cred);
2301
2302 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2303 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2304 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2305 clear_bit(NFS_OPEN_STATE, &state->flags);
2306 }
2307 return status;
2308}
2309
2310static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2311{
2312 int status;
2313
2314 nfs41_check_delegation_stateid(state);
2315 status = nfs41_check_open_stateid(state);
2316 if (status != NFS_OK)
2317 status = nfs4_open_expired(sp, state);
2318 return status;
2319}
2320#endif
2321
2322/*
2323 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2324 * fields corresponding to attributes that were used to store the verifier.
2325 * Make sure we clobber those fields in the later setattr call
2326 */
2327static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2328 struct iattr *sattr, struct nfs4_label **label)
2329{
2330 const u32 *attrset = opendata->o_res.attrset;
2331
2332 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2333 !(sattr->ia_valid & ATTR_ATIME_SET))
2334 sattr->ia_valid |= ATTR_ATIME;
2335
2336 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2337 !(sattr->ia_valid & ATTR_MTIME_SET))
2338 sattr->ia_valid |= ATTR_MTIME;
2339
2340 /* Except MODE, it seems harmless of setting twice. */
2341 if ((attrset[1] & FATTR4_WORD1_MODE))
2342 sattr->ia_valid &= ~ATTR_MODE;
2343
2344 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2345 *label = NULL;
2346}
2347
2348static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2349 fmode_t fmode,
2350 int flags,
2351 struct nfs_open_context *ctx)
2352{
2353 struct nfs4_state_owner *sp = opendata->owner;
2354 struct nfs_server *server = sp->so_server;
2355 struct dentry *dentry;
2356 struct nfs4_state *state;
2357 unsigned int seq;
2358 int ret;
2359
2360 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2361
2362 ret = _nfs4_proc_open(opendata);
2363 if (ret != 0)
2364 goto out;
2365
2366 state = nfs4_opendata_to_nfs4_state(opendata);
2367 ret = PTR_ERR(state);
2368 if (IS_ERR(state))
2369 goto out;
2370 if (server->caps & NFS_CAP_POSIX_LOCK)
2371 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2372
2373 dentry = opendata->dentry;
2374 if (d_really_is_negative(dentry)) {
2375 /* FIXME: Is this d_drop() ever needed? */
2376 d_drop(dentry);
2377 dentry = d_add_unique(dentry, igrab(state->inode));
2378 if (dentry == NULL) {
2379 dentry = opendata->dentry;
2380 } else if (dentry != ctx->dentry) {
2381 dput(ctx->dentry);
2382 ctx->dentry = dget(dentry);
2383 }
2384 nfs_set_verifier(dentry,
2385 nfs_save_change_attribute(d_inode(opendata->dir)));
2386 }
2387
2388 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2389 if (ret != 0)
2390 goto out;
2391
2392 ctx->state = state;
2393 if (d_inode(dentry) == state->inode) {
2394 nfs_inode_attach_open_context(ctx);
2395 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2396 nfs4_schedule_stateid_recovery(server, state);
2397 }
2398out:
2399 return ret;
2400}
2401
2402/*
2403 * Returns a referenced nfs4_state
2404 */
2405static int _nfs4_do_open(struct inode *dir,
2406 struct nfs_open_context *ctx,
2407 int flags,
2408 struct iattr *sattr,
2409 struct nfs4_label *label,
2410 int *opened)
2411{
2412 struct nfs4_state_owner *sp;
2413 struct nfs4_state *state = NULL;
2414 struct nfs_server *server = NFS_SERVER(dir);
2415 struct nfs4_opendata *opendata;
2416 struct dentry *dentry = ctx->dentry;
2417 struct rpc_cred *cred = ctx->cred;
2418 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2419 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2420 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2421 struct nfs4_label *olabel = NULL;
2422 int status;
2423
2424 /* Protect against reboot recovery conflicts */
2425 status = -ENOMEM;
2426 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2427 if (sp == NULL) {
2428 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2429 goto out_err;
2430 }
2431 status = nfs4_recover_expired_lease(server);
2432 if (status != 0)
2433 goto err_put_state_owner;
2434 if (d_really_is_positive(dentry))
2435 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2436 status = -ENOMEM;
2437 if (d_really_is_positive(dentry))
2438 claim = NFS4_OPEN_CLAIM_FH;
2439 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2440 label, claim, GFP_KERNEL);
2441 if (opendata == NULL)
2442 goto err_put_state_owner;
2443
2444 if (label) {
2445 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2446 if (IS_ERR(olabel)) {
2447 status = PTR_ERR(olabel);
2448 goto err_opendata_put;
2449 }
2450 }
2451
2452 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2453 if (!opendata->f_attr.mdsthreshold) {
2454 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2455 if (!opendata->f_attr.mdsthreshold)
2456 goto err_free_label;
2457 }
2458 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2459 }
2460 if (d_really_is_positive(dentry))
2461 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2462
2463 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2464 if (status != 0)
2465 goto err_free_label;
2466 state = ctx->state;
2467
2468 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2469 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2470 nfs4_exclusive_attrset(opendata, sattr, &label);
2471
2472 nfs_fattr_init(opendata->o_res.f_attr);
2473 status = nfs4_do_setattr(state->inode, cred,
2474 opendata->o_res.f_attr, sattr,
2475 state, label, olabel);
2476 if (status == 0) {
2477 nfs_setattr_update_inode(state->inode, sattr,
2478 opendata->o_res.f_attr);
2479 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2480 }
2481 }
2482 if (opened && opendata->file_created)
2483 *opened |= FILE_CREATED;
2484
2485 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2486 *ctx_th = opendata->f_attr.mdsthreshold;
2487 opendata->f_attr.mdsthreshold = NULL;
2488 }
2489
2490 nfs4_label_free(olabel);
2491
2492 nfs4_opendata_put(opendata);
2493 nfs4_put_state_owner(sp);
2494 return 0;
2495err_free_label:
2496 nfs4_label_free(olabel);
2497err_opendata_put:
2498 nfs4_opendata_put(opendata);
2499err_put_state_owner:
2500 nfs4_put_state_owner(sp);
2501out_err:
2502 return status;
2503}
2504
2505
2506static struct nfs4_state *nfs4_do_open(struct inode *dir,
2507 struct nfs_open_context *ctx,
2508 int flags,
2509 struct iattr *sattr,
2510 struct nfs4_label *label,
2511 int *opened)
2512{
2513 struct nfs_server *server = NFS_SERVER(dir);
2514 struct nfs4_exception exception = { };
2515 struct nfs4_state *res;
2516 int status;
2517
2518 do {
2519 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2520 res = ctx->state;
2521 trace_nfs4_open_file(ctx, flags, status);
2522 if (status == 0)
2523 break;
2524 /* NOTE: BAD_SEQID means the server and client disagree about the
2525 * book-keeping w.r.t. state-changing operations
2526 * (OPEN/CLOSE/LOCK/LOCKU...)
2527 * It is actually a sign of a bug on the client or on the server.
2528 *
2529 * If we receive a BAD_SEQID error in the particular case of
2530 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2531 * have unhashed the old state_owner for us, and that we can
2532 * therefore safely retry using a new one. We should still warn
2533 * the user though...
2534 */
2535 if (status == -NFS4ERR_BAD_SEQID) {
2536 pr_warn_ratelimited("NFS: v4 server %s "
2537 " returned a bad sequence-id error!\n",
2538 NFS_SERVER(dir)->nfs_client->cl_hostname);
2539 exception.retry = 1;
2540 continue;
2541 }
2542 /*
2543 * BAD_STATEID on OPEN means that the server cancelled our
2544 * state before it received the OPEN_CONFIRM.
2545 * Recover by retrying the request as per the discussion
2546 * on Page 181 of RFC3530.
2547 */
2548 if (status == -NFS4ERR_BAD_STATEID) {
2549 exception.retry = 1;
2550 continue;
2551 }
2552 if (status == -EAGAIN) {
2553 /* We must have found a delegation */
2554 exception.retry = 1;
2555 continue;
2556 }
2557 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2558 continue;
2559 res = ERR_PTR(nfs4_handle_exception(server,
2560 status, &exception));
2561 } while (exception.retry);
2562 return res;
2563}
2564
2565static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2566 struct nfs_fattr *fattr, struct iattr *sattr,
2567 struct nfs4_state *state, struct nfs4_label *ilabel,
2568 struct nfs4_label *olabel)
2569{
2570 struct nfs_server *server = NFS_SERVER(inode);
2571 struct nfs_setattrargs arg = {
2572 .fh = NFS_FH(inode),
2573 .iap = sattr,
2574 .server = server,
2575 .bitmask = server->attr_bitmask,
2576 .label = ilabel,
2577 };
2578 struct nfs_setattrres res = {
2579 .fattr = fattr,
2580 .label = olabel,
2581 .server = server,
2582 };
2583 struct rpc_message msg = {
2584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2585 .rpc_argp = &arg,
2586 .rpc_resp = &res,
2587 .rpc_cred = cred,
2588 };
2589 unsigned long timestamp = jiffies;
2590 fmode_t fmode;
2591 bool truncate;
2592 int status;
2593
2594 arg.bitmask = nfs4_bitmask(server, ilabel);
2595 if (ilabel)
2596 arg.bitmask = nfs4_bitmask(server, olabel);
2597
2598 nfs_fattr_init(fattr);
2599
2600 /* Servers should only apply open mode checks for file size changes */
2601 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2602 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2603
2604 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2605 /* Use that stateid */
2606 } else if (truncate && state != NULL) {
2607 struct nfs_lockowner lockowner = {
2608 .l_owner = current->files,
2609 .l_pid = current->tgid,
2610 };
2611 if (!nfs4_valid_open_stateid(state))
2612 return -EBADF;
2613 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2614 &lockowner) == -EIO)
2615 return -EBADF;
2616 } else
2617 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2618
2619 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2620 if (status == 0 && state != NULL)
2621 renew_lease(server, timestamp);
2622 return status;
2623}
2624
2625static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2626 struct nfs_fattr *fattr, struct iattr *sattr,
2627 struct nfs4_state *state, struct nfs4_label *ilabel,
2628 struct nfs4_label *olabel)
2629{
2630 struct nfs_server *server = NFS_SERVER(inode);
2631 struct nfs4_exception exception = {
2632 .state = state,
2633 .inode = inode,
2634 };
2635 int err;
2636 do {
2637 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2638 trace_nfs4_setattr(inode, err);
2639 switch (err) {
2640 case -NFS4ERR_OPENMODE:
2641 if (!(sattr->ia_valid & ATTR_SIZE)) {
2642 pr_warn_once("NFSv4: server %s is incorrectly "
2643 "applying open mode checks to "
2644 "a SETATTR that is not "
2645 "changing file size.\n",
2646 server->nfs_client->cl_hostname);
2647 }
2648 if (state && !(state->state & FMODE_WRITE)) {
2649 err = -EBADF;
2650 if (sattr->ia_valid & ATTR_OPEN)
2651 err = -EACCES;
2652 goto out;
2653 }
2654 }
2655 err = nfs4_handle_exception(server, err, &exception);
2656 } while (exception.retry);
2657out:
2658 return err;
2659}
2660
2661static bool
2662nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2663{
2664 if (inode == NULL || !nfs_have_layout(inode))
2665 return false;
2666
2667 return pnfs_wait_on_layoutreturn(inode, task);
2668}
2669
2670struct nfs4_closedata {
2671 struct inode *inode;
2672 struct nfs4_state *state;
2673 struct nfs_closeargs arg;
2674 struct nfs_closeres res;
2675 struct nfs_fattr fattr;
2676 unsigned long timestamp;
2677 bool roc;
2678 u32 roc_barrier;
2679};
2680
2681static void nfs4_free_closedata(void *data)
2682{
2683 struct nfs4_closedata *calldata = data;
2684 struct nfs4_state_owner *sp = calldata->state->owner;
2685 struct super_block *sb = calldata->state->inode->i_sb;
2686
2687 if (calldata->roc)
2688 pnfs_roc_release(calldata->state->inode);
2689 nfs4_put_open_state(calldata->state);
2690 nfs_free_seqid(calldata->arg.seqid);
2691 nfs4_put_state_owner(sp);
2692 nfs_sb_deactive(sb);
2693 kfree(calldata);
2694}
2695
2696static void nfs4_close_done(struct rpc_task *task, void *data)
2697{
2698 struct nfs4_closedata *calldata = data;
2699 struct nfs4_state *state = calldata->state;
2700 struct nfs_server *server = NFS_SERVER(calldata->inode);
2701 nfs4_stateid *res_stateid = NULL;
2702
2703 dprintk("%s: begin!\n", __func__);
2704 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2705 return;
2706 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2707 /* hmm. we are done with the inode, and in the process of freeing
2708 * the state_owner. we keep this around to process errors
2709 */
2710 switch (task->tk_status) {
2711 case 0:
2712 res_stateid = &calldata->res.stateid;
2713 if (calldata->roc)
2714 pnfs_roc_set_barrier(state->inode,
2715 calldata->roc_barrier);
2716 renew_lease(server, calldata->timestamp);
2717 break;
2718 case -NFS4ERR_ADMIN_REVOKED:
2719 case -NFS4ERR_STALE_STATEID:
2720 case -NFS4ERR_OLD_STATEID:
2721 case -NFS4ERR_BAD_STATEID:
2722 case -NFS4ERR_EXPIRED:
2723 if (!nfs4_stateid_match(&calldata->arg.stateid,
2724 &state->open_stateid)) {
2725 rpc_restart_call_prepare(task);
2726 goto out_release;
2727 }
2728 if (calldata->arg.fmode == 0)
2729 break;
2730 default:
2731 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2732 rpc_restart_call_prepare(task);
2733 goto out_release;
2734 }
2735 }
2736 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2737 res_stateid, calldata->arg.fmode);
2738out_release:
2739 nfs_release_seqid(calldata->arg.seqid);
2740 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2741 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2742}
2743
2744static void nfs4_close_prepare(struct rpc_task *task, void *data)
2745{
2746 struct nfs4_closedata *calldata = data;
2747 struct nfs4_state *state = calldata->state;
2748 struct inode *inode = calldata->inode;
2749 bool is_rdonly, is_wronly, is_rdwr;
2750 int call_close = 0;
2751
2752 dprintk("%s: begin!\n", __func__);
2753 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2754 goto out_wait;
2755
2756 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2757 spin_lock(&state->owner->so_lock);
2758 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2759 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2760 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2761 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
2762 /* Calculate the change in open mode */
2763 calldata->arg.fmode = 0;
2764 if (state->n_rdwr == 0) {
2765 if (state->n_rdonly == 0)
2766 call_close |= is_rdonly;
2767 else if (is_rdonly)
2768 calldata->arg.fmode |= FMODE_READ;
2769 if (state->n_wronly == 0)
2770 call_close |= is_wronly;
2771 else if (is_wronly)
2772 calldata->arg.fmode |= FMODE_WRITE;
2773 } else if (is_rdwr)
2774 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2775
2776 if (calldata->arg.fmode == 0)
2777 call_close |= is_rdwr;
2778
2779 if (!nfs4_valid_open_stateid(state))
2780 call_close = 0;
2781 spin_unlock(&state->owner->so_lock);
2782
2783 if (!call_close) {
2784 /* Note: exit _without_ calling nfs4_close_done */
2785 goto out_no_action;
2786 }
2787
2788 if (nfs4_wait_on_layoutreturn(inode, task)) {
2789 nfs_release_seqid(calldata->arg.seqid);
2790 goto out_wait;
2791 }
2792
2793 if (calldata->arg.fmode == 0)
2794 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2795 if (calldata->roc)
2796 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2797
2798 calldata->arg.share_access =
2799 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2800 calldata->arg.fmode, 0);
2801
2802 nfs_fattr_init(calldata->res.fattr);
2803 calldata->timestamp = jiffies;
2804 if (nfs4_setup_sequence(NFS_SERVER(inode),
2805 &calldata->arg.seq_args,
2806 &calldata->res.seq_res,
2807 task) != 0)
2808 nfs_release_seqid(calldata->arg.seqid);
2809 dprintk("%s: done!\n", __func__);
2810 return;
2811out_no_action:
2812 task->tk_action = NULL;
2813out_wait:
2814 nfs4_sequence_done(task, &calldata->res.seq_res);
2815}
2816
2817static const struct rpc_call_ops nfs4_close_ops = {
2818 .rpc_call_prepare = nfs4_close_prepare,
2819 .rpc_call_done = nfs4_close_done,
2820 .rpc_release = nfs4_free_closedata,
2821};
2822
2823static bool nfs4_roc(struct inode *inode)
2824{
2825 if (!nfs_have_layout(inode))
2826 return false;
2827 return pnfs_roc(inode);
2828}
2829
2830/*
2831 * It is possible for data to be read/written from a mem-mapped file
2832 * after the sys_close call (which hits the vfs layer as a flush).
2833 * This means that we can't safely call nfsv4 close on a file until
2834 * the inode is cleared. This in turn means that we are not good
2835 * NFSv4 citizens - we do not indicate to the server to update the file's
2836 * share state even when we are done with one of the three share
2837 * stateid's in the inode.
2838 *
2839 * NOTE: Caller must be holding the sp->so_owner semaphore!
2840 */
2841int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2842{
2843 struct nfs_server *server = NFS_SERVER(state->inode);
2844 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2845 struct nfs4_closedata *calldata;
2846 struct nfs4_state_owner *sp = state->owner;
2847 struct rpc_task *task;
2848 struct rpc_message msg = {
2849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2850 .rpc_cred = state->owner->so_cred,
2851 };
2852 struct rpc_task_setup task_setup_data = {
2853 .rpc_client = server->client,
2854 .rpc_message = &msg,
2855 .callback_ops = &nfs4_close_ops,
2856 .workqueue = nfsiod_workqueue,
2857 .flags = RPC_TASK_ASYNC,
2858 };
2859 int status = -ENOMEM;
2860
2861 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2862 &task_setup_data.rpc_client, &msg);
2863
2864 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2865 if (calldata == NULL)
2866 goto out;
2867 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2868 calldata->inode = state->inode;
2869 calldata->state = state;
2870 calldata->arg.fh = NFS_FH(state->inode);
2871 /* Serialization for the sequence id */
2872 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2873 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2874 if (IS_ERR(calldata->arg.seqid))
2875 goto out_free_calldata;
2876 calldata->arg.fmode = 0;
2877 calldata->arg.bitmask = server->cache_consistency_bitmask;
2878 calldata->res.fattr = &calldata->fattr;
2879 calldata->res.seqid = calldata->arg.seqid;
2880 calldata->res.server = server;
2881 calldata->roc = nfs4_roc(state->inode);
2882 nfs_sb_active(calldata->inode->i_sb);
2883
2884 msg.rpc_argp = &calldata->arg;
2885 msg.rpc_resp = &calldata->res;
2886 task_setup_data.callback_data = calldata;
2887 task = rpc_run_task(&task_setup_data);
2888 if (IS_ERR(task))
2889 return PTR_ERR(task);
2890 status = 0;
2891 if (wait)
2892 status = rpc_wait_for_completion_task(task);
2893 rpc_put_task(task);
2894 return status;
2895out_free_calldata:
2896 kfree(calldata);
2897out:
2898 nfs4_put_open_state(state);
2899 nfs4_put_state_owner(sp);
2900 return status;
2901}
2902
2903static struct inode *
2904nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2905 int open_flags, struct iattr *attr, int *opened)
2906{
2907 struct nfs4_state *state;
2908 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2909
2910 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2911
2912 /* Protect against concurrent sillydeletes */
2913 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2914
2915 nfs4_label_release_security(label);
2916
2917 if (IS_ERR(state))
2918 return ERR_CAST(state);
2919 return state->inode;
2920}
2921
2922static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2923{
2924 if (ctx->state == NULL)
2925 return;
2926 if (is_sync)
2927 nfs4_close_sync(ctx->state, ctx->mode);
2928 else
2929 nfs4_close_state(ctx->state, ctx->mode);
2930}
2931
2932#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2933#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2934#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2935
2936static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2937{
2938 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
2939 struct nfs4_server_caps_arg args = {
2940 .fhandle = fhandle,
2941 .bitmask = bitmask,
2942 };
2943 struct nfs4_server_caps_res res = {};
2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2946 .rpc_argp = &args,
2947 .rpc_resp = &res,
2948 };
2949 int status;
2950
2951 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2952 FATTR4_WORD0_FH_EXPIRE_TYPE |
2953 FATTR4_WORD0_LINK_SUPPORT |
2954 FATTR4_WORD0_SYMLINK_SUPPORT |
2955 FATTR4_WORD0_ACLSUPPORT;
2956 if (minorversion)
2957 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2958
2959 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2960 if (status == 0) {
2961 /* Sanity check the server answers */
2962 switch (minorversion) {
2963 case 0:
2964 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2965 res.attr_bitmask[2] = 0;
2966 break;
2967 case 1:
2968 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2969 break;
2970 case 2:
2971 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2972 }
2973 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2974 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2975 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2976 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2977 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2978 NFS_CAP_CTIME|NFS_CAP_MTIME|
2979 NFS_CAP_SECURITY_LABEL);
2980 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2981 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2982 server->caps |= NFS_CAP_ACLS;
2983 if (res.has_links != 0)
2984 server->caps |= NFS_CAP_HARDLINKS;
2985 if (res.has_symlinks != 0)
2986 server->caps |= NFS_CAP_SYMLINKS;
2987 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2988 server->caps |= NFS_CAP_FILEID;
2989 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2990 server->caps |= NFS_CAP_MODE;
2991 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2992 server->caps |= NFS_CAP_NLINK;
2993 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2994 server->caps |= NFS_CAP_OWNER;
2995 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2996 server->caps |= NFS_CAP_OWNER_GROUP;
2997 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2998 server->caps |= NFS_CAP_ATIME;
2999 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3000 server->caps |= NFS_CAP_CTIME;
3001 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3002 server->caps |= NFS_CAP_MTIME;
3003#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3004 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3005 server->caps |= NFS_CAP_SECURITY_LABEL;
3006#endif
3007 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3008 sizeof(server->attr_bitmask));
3009 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3010
3011 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3012 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3013 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3014 server->cache_consistency_bitmask[2] = 0;
3015 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3016 sizeof(server->exclcreat_bitmask));
3017 server->acl_bitmask = res.acl_bitmask;
3018 server->fh_expire_type = res.fh_expire_type;
3019 }
3020
3021 return status;
3022}
3023
3024int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3025{
3026 struct nfs4_exception exception = { };
3027 int err;
3028 do {
3029 err = nfs4_handle_exception(server,
3030 _nfs4_server_capabilities(server, fhandle),
3031 &exception);
3032 } while (exception.retry);
3033 return err;
3034}
3035
3036static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3037 struct nfs_fsinfo *info)
3038{
3039 u32 bitmask[3];
3040 struct nfs4_lookup_root_arg args = {
3041 .bitmask = bitmask,
3042 };
3043 struct nfs4_lookup_res res = {
3044 .server = server,
3045 .fattr = info->fattr,
3046 .fh = fhandle,
3047 };
3048 struct rpc_message msg = {
3049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3050 .rpc_argp = &args,
3051 .rpc_resp = &res,
3052 };
3053
3054 bitmask[0] = nfs4_fattr_bitmap[0];
3055 bitmask[1] = nfs4_fattr_bitmap[1];
3056 /*
3057 * Process the label in the upcoming getfattr
3058 */
3059 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3060
3061 nfs_fattr_init(info->fattr);
3062 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3063}
3064
3065static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3066 struct nfs_fsinfo *info)
3067{
3068 struct nfs4_exception exception = { };
3069 int err;
3070 do {
3071 err = _nfs4_lookup_root(server, fhandle, info);
3072 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3073 switch (err) {
3074 case 0:
3075 case -NFS4ERR_WRONGSEC:
3076 goto out;
3077 default:
3078 err = nfs4_handle_exception(server, err, &exception);
3079 }
3080 } while (exception.retry);
3081out:
3082 return err;
3083}
3084
3085static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3086 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3087{
3088 struct rpc_auth_create_args auth_args = {
3089 .pseudoflavor = flavor,
3090 };
3091 struct rpc_auth *auth;
3092 int ret;
3093
3094 auth = rpcauth_create(&auth_args, server->client);
3095 if (IS_ERR(auth)) {
3096 ret = -EACCES;
3097 goto out;
3098 }
3099 ret = nfs4_lookup_root(server, fhandle, info);
3100out:
3101 return ret;
3102}
3103
3104/*
3105 * Retry pseudoroot lookup with various security flavors. We do this when:
3106 *
3107 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3108 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3109 *
3110 * Returns zero on success, or a negative NFS4ERR value, or a
3111 * negative errno value.
3112 */
3113static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3114 struct nfs_fsinfo *info)
3115{
3116 /* Per 3530bis 15.33.5 */
3117 static const rpc_authflavor_t flav_array[] = {
3118 RPC_AUTH_GSS_KRB5P,
3119 RPC_AUTH_GSS_KRB5I,
3120 RPC_AUTH_GSS_KRB5,
3121 RPC_AUTH_UNIX, /* courtesy */
3122 RPC_AUTH_NULL,
3123 };
3124 int status = -EPERM;
3125 size_t i;
3126
3127 if (server->auth_info.flavor_len > 0) {
3128 /* try each flavor specified by user */
3129 for (i = 0; i < server->auth_info.flavor_len; i++) {
3130 status = nfs4_lookup_root_sec(server, fhandle, info,
3131 server->auth_info.flavors[i]);
3132 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3133 continue;
3134 break;
3135 }
3136 } else {
3137 /* no flavors specified by user, try default list */
3138 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3139 status = nfs4_lookup_root_sec(server, fhandle, info,
3140 flav_array[i]);
3141 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3142 continue;
3143 break;
3144 }
3145 }
3146
3147 /*
3148 * -EACCESS could mean that the user doesn't have correct permissions
3149 * to access the mount. It could also mean that we tried to mount
3150 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3151 * existing mount programs don't handle -EACCES very well so it should
3152 * be mapped to -EPERM instead.
3153 */
3154 if (status == -EACCES)
3155 status = -EPERM;
3156 return status;
3157}
3158
3159static int nfs4_do_find_root_sec(struct nfs_server *server,
3160 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3161{
3162 int mv = server->nfs_client->cl_minorversion;
3163 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3164}
3165
3166/**
3167 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3168 * @server: initialized nfs_server handle
3169 * @fhandle: we fill in the pseudo-fs root file handle
3170 * @info: we fill in an FSINFO struct
3171 * @auth_probe: probe the auth flavours
3172 *
3173 * Returns zero on success, or a negative errno.
3174 */
3175int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_fsinfo *info,
3177 bool auth_probe)
3178{
3179 int status = 0;
3180
3181 if (!auth_probe)
3182 status = nfs4_lookup_root(server, fhandle, info);
3183
3184 if (auth_probe || status == NFS4ERR_WRONGSEC)
3185 status = nfs4_do_find_root_sec(server, fhandle, info);
3186
3187 if (status == 0)
3188 status = nfs4_server_capabilities(server, fhandle);
3189 if (status == 0)
3190 status = nfs4_do_fsinfo(server, fhandle, info);
3191
3192 return nfs4_map_errors(status);
3193}
3194
3195static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3196 struct nfs_fsinfo *info)
3197{
3198 int error;
3199 struct nfs_fattr *fattr = info->fattr;
3200 struct nfs4_label *label = NULL;
3201
3202 error = nfs4_server_capabilities(server, mntfh);
3203 if (error < 0) {
3204 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3205 return error;
3206 }
3207
3208 label = nfs4_label_alloc(server, GFP_KERNEL);
3209 if (IS_ERR(label))
3210 return PTR_ERR(label);
3211
3212 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3213 if (error < 0) {
3214 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3215 goto err_free_label;
3216 }
3217
3218 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3219 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3220 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3221
3222err_free_label:
3223 nfs4_label_free(label);
3224
3225 return error;
3226}
3227
3228/*
3229 * Get locations and (maybe) other attributes of a referral.
3230 * Note that we'll actually follow the referral later when
3231 * we detect fsid mismatch in inode revalidation
3232 */
3233static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3234 const struct qstr *name, struct nfs_fattr *fattr,
3235 struct nfs_fh *fhandle)
3236{
3237 int status = -ENOMEM;
3238 struct page *page = NULL;
3239 struct nfs4_fs_locations *locations = NULL;
3240
3241 page = alloc_page(GFP_KERNEL);
3242 if (page == NULL)
3243 goto out;
3244 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3245 if (locations == NULL)
3246 goto out;
3247
3248 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3249 if (status != 0)
3250 goto out;
3251
3252 /*
3253 * If the fsid didn't change, this is a migration event, not a
3254 * referral. Cause us to drop into the exception handler, which
3255 * will kick off migration recovery.
3256 */
3257 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3258 dprintk("%s: server did not return a different fsid for"
3259 " a referral at %s\n", __func__, name->name);
3260 status = -NFS4ERR_MOVED;
3261 goto out;
3262 }
3263 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3264 nfs_fixup_referral_attributes(&locations->fattr);
3265
3266 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3267 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3268 memset(fhandle, 0, sizeof(struct nfs_fh));
3269out:
3270 if (page)
3271 __free_page(page);
3272 kfree(locations);
3273 return status;
3274}
3275
3276static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3277 struct nfs_fattr *fattr, struct nfs4_label *label)
3278{
3279 struct nfs4_getattr_arg args = {
3280 .fh = fhandle,
3281 .bitmask = server->attr_bitmask,
3282 };
3283 struct nfs4_getattr_res res = {
3284 .fattr = fattr,
3285 .label = label,
3286 .server = server,
3287 };
3288 struct rpc_message msg = {
3289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3290 .rpc_argp = &args,
3291 .rpc_resp = &res,
3292 };
3293
3294 args.bitmask = nfs4_bitmask(server, label);
3295
3296 nfs_fattr_init(fattr);
3297 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3298}
3299
3300static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3301 struct nfs_fattr *fattr, struct nfs4_label *label)
3302{
3303 struct nfs4_exception exception = { };
3304 int err;
3305 do {
3306 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3307 trace_nfs4_getattr(server, fhandle, fattr, err);
3308 err = nfs4_handle_exception(server, err,
3309 &exception);
3310 } while (exception.retry);
3311 return err;
3312}
3313
3314/*
3315 * The file is not closed if it is opened due to the a request to change
3316 * the size of the file. The open call will not be needed once the
3317 * VFS layer lookup-intents are implemented.
3318 *
3319 * Close is called when the inode is destroyed.
3320 * If we haven't opened the file for O_WRONLY, we
3321 * need to in the size_change case to obtain a stateid.
3322 *
3323 * Got race?
3324 * Because OPEN is always done by name in nfsv4, it is
3325 * possible that we opened a different file by the same
3326 * name. We can recognize this race condition, but we
3327 * can't do anything about it besides returning an error.
3328 *
3329 * This will be fixed with VFS changes (lookup-intent).
3330 */
3331static int
3332nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3333 struct iattr *sattr)
3334{
3335 struct inode *inode = d_inode(dentry);
3336 struct rpc_cred *cred = NULL;
3337 struct nfs4_state *state = NULL;
3338 struct nfs4_label *label = NULL;
3339 int status;
3340
3341 if (pnfs_ld_layoutret_on_setattr(inode) &&
3342 sattr->ia_valid & ATTR_SIZE &&
3343 sattr->ia_size < i_size_read(inode))
3344 pnfs_commit_and_return_layout(inode);
3345
3346 nfs_fattr_init(fattr);
3347
3348 /* Deal with open(O_TRUNC) */
3349 if (sattr->ia_valid & ATTR_OPEN)
3350 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3351
3352 /* Optimization: if the end result is no change, don't RPC */
3353 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3354 return 0;
3355
3356 /* Search for an existing open(O_WRITE) file */
3357 if (sattr->ia_valid & ATTR_FILE) {
3358 struct nfs_open_context *ctx;
3359
3360 ctx = nfs_file_open_context(sattr->ia_file);
3361 if (ctx) {
3362 cred = ctx->cred;
3363 state = ctx->state;
3364 }
3365 }
3366
3367 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3368 if (IS_ERR(label))
3369 return PTR_ERR(label);
3370
3371 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3372 if (status == 0) {
3373 nfs_setattr_update_inode(inode, sattr, fattr);
3374 nfs_setsecurity(inode, fattr, label);
3375 }
3376 nfs4_label_free(label);
3377 return status;
3378}
3379
3380static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3381 const struct qstr *name, struct nfs_fh *fhandle,
3382 struct nfs_fattr *fattr, struct nfs4_label *label)
3383{
3384 struct nfs_server *server = NFS_SERVER(dir);
3385 int status;
3386 struct nfs4_lookup_arg args = {
3387 .bitmask = server->attr_bitmask,
3388 .dir_fh = NFS_FH(dir),
3389 .name = name,
3390 };
3391 struct nfs4_lookup_res res = {
3392 .server = server,
3393 .fattr = fattr,
3394 .label = label,
3395 .fh = fhandle,
3396 };
3397 struct rpc_message msg = {
3398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3399 .rpc_argp = &args,
3400 .rpc_resp = &res,
3401 };
3402
3403 args.bitmask = nfs4_bitmask(server, label);
3404
3405 nfs_fattr_init(fattr);
3406
3407 dprintk("NFS call lookup %s\n", name->name);
3408 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3409 dprintk("NFS reply lookup: %d\n", status);
3410 return status;
3411}
3412
3413static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3414{
3415 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3416 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3417 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3418 fattr->nlink = 2;
3419}
3420
3421static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3422 struct qstr *name, struct nfs_fh *fhandle,
3423 struct nfs_fattr *fattr, struct nfs4_label *label)
3424{
3425 struct nfs4_exception exception = { };
3426 struct rpc_clnt *client = *clnt;
3427 int err;
3428 do {
3429 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3430 trace_nfs4_lookup(dir, name, err);
3431 switch (err) {
3432 case -NFS4ERR_BADNAME:
3433 err = -ENOENT;
3434 goto out;
3435 case -NFS4ERR_MOVED:
3436 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3437 if (err == -NFS4ERR_MOVED)
3438 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3439 goto out;
3440 case -NFS4ERR_WRONGSEC:
3441 err = -EPERM;
3442 if (client != *clnt)
3443 goto out;
3444 client = nfs4_negotiate_security(client, dir, name);
3445 if (IS_ERR(client))
3446 return PTR_ERR(client);
3447
3448 exception.retry = 1;
3449 break;
3450 default:
3451 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3452 }
3453 } while (exception.retry);
3454
3455out:
3456 if (err == 0)
3457 *clnt = client;
3458 else if (client != *clnt)
3459 rpc_shutdown_client(client);
3460
3461 return err;
3462}
3463
3464static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3465 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3466 struct nfs4_label *label)
3467{
3468 int status;
3469 struct rpc_clnt *client = NFS_CLIENT(dir);
3470
3471 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3472 if (client != NFS_CLIENT(dir)) {
3473 rpc_shutdown_client(client);
3474 nfs_fixup_secinfo_attributes(fattr);
3475 }
3476 return status;
3477}
3478
3479struct rpc_clnt *
3480nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3481 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3482{
3483 struct rpc_clnt *client = NFS_CLIENT(dir);
3484 int status;
3485
3486 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3487 if (status < 0)
3488 return ERR_PTR(status);
3489 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3490}
3491
3492static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3493{
3494 struct nfs_server *server = NFS_SERVER(inode);
3495 struct nfs4_accessargs args = {
3496 .fh = NFS_FH(inode),
3497 .bitmask = server->cache_consistency_bitmask,
3498 };
3499 struct nfs4_accessres res = {
3500 .server = server,
3501 };
3502 struct rpc_message msg = {
3503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3504 .rpc_argp = &args,
3505 .rpc_resp = &res,
3506 .rpc_cred = entry->cred,
3507 };
3508 int mode = entry->mask;
3509 int status = 0;
3510
3511 /*
3512 * Determine which access bits we want to ask for...
3513 */
3514 if (mode & MAY_READ)
3515 args.access |= NFS4_ACCESS_READ;
3516 if (S_ISDIR(inode->i_mode)) {
3517 if (mode & MAY_WRITE)
3518 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3519 if (mode & MAY_EXEC)
3520 args.access |= NFS4_ACCESS_LOOKUP;
3521 } else {
3522 if (mode & MAY_WRITE)
3523 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3524 if (mode & MAY_EXEC)
3525 args.access |= NFS4_ACCESS_EXECUTE;
3526 }
3527
3528 res.fattr = nfs_alloc_fattr();
3529 if (res.fattr == NULL)
3530 return -ENOMEM;
3531
3532 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3533 if (!status) {
3534 nfs_access_set_mask(entry, res.access);
3535 nfs_refresh_inode(inode, res.fattr);
3536 }
3537 nfs_free_fattr(res.fattr);
3538 return status;
3539}
3540
3541static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3542{
3543 struct nfs4_exception exception = { };
3544 int err;
3545 do {
3546 err = _nfs4_proc_access(inode, entry);
3547 trace_nfs4_access(inode, err);
3548 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3549 &exception);
3550 } while (exception.retry);
3551 return err;
3552}
3553
3554/*
3555 * TODO: For the time being, we don't try to get any attributes
3556 * along with any of the zero-copy operations READ, READDIR,
3557 * READLINK, WRITE.
3558 *
3559 * In the case of the first three, we want to put the GETATTR
3560 * after the read-type operation -- this is because it is hard
3561 * to predict the length of a GETATTR response in v4, and thus
3562 * align the READ data correctly. This means that the GETATTR
3563 * may end up partially falling into the page cache, and we should
3564 * shift it into the 'tail' of the xdr_buf before processing.
3565 * To do this efficiently, we need to know the total length
3566 * of data received, which doesn't seem to be available outside
3567 * of the RPC layer.
3568 *
3569 * In the case of WRITE, we also want to put the GETATTR after
3570 * the operation -- in this case because we want to make sure
3571 * we get the post-operation mtime and size.
3572 *
3573 * Both of these changes to the XDR layer would in fact be quite
3574 * minor, but I decided to leave them for a subsequent patch.
3575 */
3576static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3577 unsigned int pgbase, unsigned int pglen)
3578{
3579 struct nfs4_readlink args = {
3580 .fh = NFS_FH(inode),
3581 .pgbase = pgbase,
3582 .pglen = pglen,
3583 .pages = &page,
3584 };
3585 struct nfs4_readlink_res res;
3586 struct rpc_message msg = {
3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3588 .rpc_argp = &args,
3589 .rpc_resp = &res,
3590 };
3591
3592 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3593}
3594
3595static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3596 unsigned int pgbase, unsigned int pglen)
3597{
3598 struct nfs4_exception exception = { };
3599 int err;
3600 do {
3601 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3602 trace_nfs4_readlink(inode, err);
3603 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3604 &exception);
3605 } while (exception.retry);
3606 return err;
3607}
3608
3609/*
3610 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3611 */
3612static int
3613nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3614 int flags)
3615{
3616 struct nfs4_label l, *ilabel = NULL;
3617 struct nfs_open_context *ctx;
3618 struct nfs4_state *state;
3619 int status = 0;
3620
3621 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3622 if (IS_ERR(ctx))
3623 return PTR_ERR(ctx);
3624
3625 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3626
3627 sattr->ia_mode &= ~current_umask();
3628 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3629 if (IS_ERR(state)) {
3630 status = PTR_ERR(state);
3631 goto out;
3632 }
3633out:
3634 nfs4_label_release_security(ilabel);
3635 put_nfs_open_context(ctx);
3636 return status;
3637}
3638
3639static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3640{
3641 struct nfs_server *server = NFS_SERVER(dir);
3642 struct nfs_removeargs args = {
3643 .fh = NFS_FH(dir),
3644 .name = *name,
3645 };
3646 struct nfs_removeres res = {
3647 .server = server,
3648 };
3649 struct rpc_message msg = {
3650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3651 .rpc_argp = &args,
3652 .rpc_resp = &res,
3653 };
3654 int status;
3655
3656 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3657 if (status == 0)
3658 update_changeattr(dir, &res.cinfo);
3659 return status;
3660}
3661
3662static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3663{
3664 struct nfs4_exception exception = { };
3665 int err;
3666 do {
3667 err = _nfs4_proc_remove(dir, name);
3668 trace_nfs4_remove(dir, name, err);
3669 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3670 &exception);
3671 } while (exception.retry);
3672 return err;
3673}
3674
3675static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3676{
3677 struct nfs_server *server = NFS_SERVER(dir);
3678 struct nfs_removeargs *args = msg->rpc_argp;
3679 struct nfs_removeres *res = msg->rpc_resp;
3680
3681 res->server = server;
3682 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3683 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3684
3685 nfs_fattr_init(res->dir_attr);
3686}
3687
3688static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3689{
3690 nfs4_setup_sequence(NFS_SERVER(data->dir),
3691 &data->args.seq_args,
3692 &data->res.seq_res,
3693 task);
3694}
3695
3696static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3697{
3698 struct nfs_unlinkdata *data = task->tk_calldata;
3699 struct nfs_removeres *res = &data->res;
3700
3701 if (!nfs4_sequence_done(task, &res->seq_res))
3702 return 0;
3703 if (nfs4_async_handle_error(task, res->server, NULL,
3704 &data->timeout) == -EAGAIN)
3705 return 0;
3706 update_changeattr(dir, &res->cinfo);
3707 return 1;
3708}
3709
3710static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3711{
3712 struct nfs_server *server = NFS_SERVER(dir);
3713 struct nfs_renameargs *arg = msg->rpc_argp;
3714 struct nfs_renameres *res = msg->rpc_resp;
3715
3716 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3717 res->server = server;
3718 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3719}
3720
3721static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3722{
3723 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3724 &data->args.seq_args,
3725 &data->res.seq_res,
3726 task);
3727}
3728
3729static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3730 struct inode *new_dir)
3731{
3732 struct nfs_renamedata *data = task->tk_calldata;
3733 struct nfs_renameres *res = &data->res;
3734
3735 if (!nfs4_sequence_done(task, &res->seq_res))
3736 return 0;
3737 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3738 return 0;
3739
3740 update_changeattr(old_dir, &res->old_cinfo);
3741 update_changeattr(new_dir, &res->new_cinfo);
3742 return 1;
3743}
3744
3745static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3746{
3747 struct nfs_server *server = NFS_SERVER(inode);
3748 struct nfs4_link_arg arg = {
3749 .fh = NFS_FH(inode),
3750 .dir_fh = NFS_FH(dir),
3751 .name = name,
3752 .bitmask = server->attr_bitmask,
3753 };
3754 struct nfs4_link_res res = {
3755 .server = server,
3756 .label = NULL,
3757 };
3758 struct rpc_message msg = {
3759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3760 .rpc_argp = &arg,
3761 .rpc_resp = &res,
3762 };
3763 int status = -ENOMEM;
3764
3765 res.fattr = nfs_alloc_fattr();
3766 if (res.fattr == NULL)
3767 goto out;
3768
3769 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3770 if (IS_ERR(res.label)) {
3771 status = PTR_ERR(res.label);
3772 goto out;
3773 }
3774 arg.bitmask = nfs4_bitmask(server, res.label);
3775
3776 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3777 if (!status) {
3778 update_changeattr(dir, &res.cinfo);
3779 status = nfs_post_op_update_inode(inode, res.fattr);
3780 if (!status)
3781 nfs_setsecurity(inode, res.fattr, res.label);
3782 }
3783
3784
3785 nfs4_label_free(res.label);
3786
3787out:
3788 nfs_free_fattr(res.fattr);
3789 return status;
3790}
3791
3792static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3793{
3794 struct nfs4_exception exception = { };
3795 int err;
3796 do {
3797 err = nfs4_handle_exception(NFS_SERVER(inode),
3798 _nfs4_proc_link(inode, dir, name),
3799 &exception);
3800 } while (exception.retry);
3801 return err;
3802}
3803
3804struct nfs4_createdata {
3805 struct rpc_message msg;
3806 struct nfs4_create_arg arg;
3807 struct nfs4_create_res res;
3808 struct nfs_fh fh;
3809 struct nfs_fattr fattr;
3810 struct nfs4_label *label;
3811};
3812
3813static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3814 struct qstr *name, struct iattr *sattr, u32 ftype)
3815{
3816 struct nfs4_createdata *data;
3817
3818 data = kzalloc(sizeof(*data), GFP_KERNEL);
3819 if (data != NULL) {
3820 struct nfs_server *server = NFS_SERVER(dir);
3821
3822 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3823 if (IS_ERR(data->label))
3824 goto out_free;
3825
3826 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3827 data->msg.rpc_argp = &data->arg;
3828 data->msg.rpc_resp = &data->res;
3829 data->arg.dir_fh = NFS_FH(dir);
3830 data->arg.server = server;
3831 data->arg.name = name;
3832 data->arg.attrs = sattr;
3833 data->arg.ftype = ftype;
3834 data->arg.bitmask = nfs4_bitmask(server, data->label);
3835 data->res.server = server;
3836 data->res.fh = &data->fh;
3837 data->res.fattr = &data->fattr;
3838 data->res.label = data->label;
3839 nfs_fattr_init(data->res.fattr);
3840 }
3841 return data;
3842out_free:
3843 kfree(data);
3844 return NULL;
3845}
3846
3847static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3848{
3849 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3850 &data->arg.seq_args, &data->res.seq_res, 1);
3851 if (status == 0) {
3852 update_changeattr(dir, &data->res.dir_cinfo);
3853 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3854 }
3855 return status;
3856}
3857
3858static void nfs4_free_createdata(struct nfs4_createdata *data)
3859{
3860 nfs4_label_free(data->label);
3861 kfree(data);
3862}
3863
3864static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3865 struct page *page, unsigned int len, struct iattr *sattr,
3866 struct nfs4_label *label)
3867{
3868 struct nfs4_createdata *data;
3869 int status = -ENAMETOOLONG;
3870
3871 if (len > NFS4_MAXPATHLEN)
3872 goto out;
3873
3874 status = -ENOMEM;
3875 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3876 if (data == NULL)
3877 goto out;
3878
3879 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3880 data->arg.u.symlink.pages = &page;
3881 data->arg.u.symlink.len = len;
3882 data->arg.label = label;
3883
3884 status = nfs4_do_create(dir, dentry, data);
3885
3886 nfs4_free_createdata(data);
3887out:
3888 return status;
3889}
3890
3891static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3892 struct page *page, unsigned int len, struct iattr *sattr)
3893{
3894 struct nfs4_exception exception = { };
3895 struct nfs4_label l, *label = NULL;
3896 int err;
3897
3898 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3899
3900 do {
3901 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3902 trace_nfs4_symlink(dir, &dentry->d_name, err);
3903 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3904 &exception);
3905 } while (exception.retry);
3906
3907 nfs4_label_release_security(label);
3908 return err;
3909}
3910
3911static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3912 struct iattr *sattr, struct nfs4_label *label)
3913{
3914 struct nfs4_createdata *data;
3915 int status = -ENOMEM;
3916
3917 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3918 if (data == NULL)
3919 goto out;
3920
3921 data->arg.label = label;
3922 status = nfs4_do_create(dir, dentry, data);
3923
3924 nfs4_free_createdata(data);
3925out:
3926 return status;
3927}
3928
3929static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3930 struct iattr *sattr)
3931{
3932 struct nfs4_exception exception = { };
3933 struct nfs4_label l, *label = NULL;
3934 int err;
3935
3936 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3937
3938 sattr->ia_mode &= ~current_umask();
3939 do {
3940 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3941 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3942 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3943 &exception);
3944 } while (exception.retry);
3945 nfs4_label_release_security(label);
3946
3947 return err;
3948}
3949
3950static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3951 u64 cookie, struct page **pages, unsigned int count, int plus)
3952{
3953 struct inode *dir = d_inode(dentry);
3954 struct nfs4_readdir_arg args = {
3955 .fh = NFS_FH(dir),
3956 .pages = pages,
3957 .pgbase = 0,
3958 .count = count,
3959 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
3960 .plus = plus,
3961 };
3962 struct nfs4_readdir_res res;
3963 struct rpc_message msg = {
3964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3965 .rpc_argp = &args,
3966 .rpc_resp = &res,
3967 .rpc_cred = cred,
3968 };
3969 int status;
3970
3971 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3972 dentry,
3973 (unsigned long long)cookie);
3974 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3975 res.pgbase = args.pgbase;
3976 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3977 if (status >= 0) {
3978 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3979 status += args.pgbase;
3980 }
3981
3982 nfs_invalidate_atime(dir);
3983
3984 dprintk("%s: returns %d\n", __func__, status);
3985 return status;
3986}
3987
3988static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3989 u64 cookie, struct page **pages, unsigned int count, int plus)
3990{
3991 struct nfs4_exception exception = { };
3992 int err;
3993 do {
3994 err = _nfs4_proc_readdir(dentry, cred, cookie,
3995 pages, count, plus);
3996 trace_nfs4_readdir(d_inode(dentry), err);
3997 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
3998 &exception);
3999 } while (exception.retry);
4000 return err;
4001}
4002
4003static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4004 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4005{
4006 struct nfs4_createdata *data;
4007 int mode = sattr->ia_mode;
4008 int status = -ENOMEM;
4009
4010 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4011 if (data == NULL)
4012 goto out;
4013
4014 if (S_ISFIFO(mode))
4015 data->arg.ftype = NF4FIFO;
4016 else if (S_ISBLK(mode)) {
4017 data->arg.ftype = NF4BLK;
4018 data->arg.u.device.specdata1 = MAJOR(rdev);
4019 data->arg.u.device.specdata2 = MINOR(rdev);
4020 }
4021 else if (S_ISCHR(mode)) {
4022 data->arg.ftype = NF4CHR;
4023 data->arg.u.device.specdata1 = MAJOR(rdev);
4024 data->arg.u.device.specdata2 = MINOR(rdev);
4025 } else if (!S_ISSOCK(mode)) {
4026 status = -EINVAL;
4027 goto out_free;
4028 }
4029
4030 data->arg.label = label;
4031 status = nfs4_do_create(dir, dentry, data);
4032out_free:
4033 nfs4_free_createdata(data);
4034out:
4035 return status;
4036}
4037
4038static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4039 struct iattr *sattr, dev_t rdev)
4040{
4041 struct nfs4_exception exception = { };
4042 struct nfs4_label l, *label = NULL;
4043 int err;
4044
4045 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4046
4047 sattr->ia_mode &= ~current_umask();
4048 do {
4049 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4050 trace_nfs4_mknod(dir, &dentry->d_name, err);
4051 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4052 &exception);
4053 } while (exception.retry);
4054
4055 nfs4_label_release_security(label);
4056
4057 return err;
4058}
4059
4060static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4061 struct nfs_fsstat *fsstat)
4062{
4063 struct nfs4_statfs_arg args = {
4064 .fh = fhandle,
4065 .bitmask = server->attr_bitmask,
4066 };
4067 struct nfs4_statfs_res res = {
4068 .fsstat = fsstat,
4069 };
4070 struct rpc_message msg = {
4071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4072 .rpc_argp = &args,
4073 .rpc_resp = &res,
4074 };
4075
4076 nfs_fattr_init(fsstat->fattr);
4077 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4078}
4079
4080static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4081{
4082 struct nfs4_exception exception = { };
4083 int err;
4084 do {
4085 err = nfs4_handle_exception(server,
4086 _nfs4_proc_statfs(server, fhandle, fsstat),
4087 &exception);
4088 } while (exception.retry);
4089 return err;
4090}
4091
4092static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4093 struct nfs_fsinfo *fsinfo)
4094{
4095 struct nfs4_fsinfo_arg args = {
4096 .fh = fhandle,
4097 .bitmask = server->attr_bitmask,
4098 };
4099 struct nfs4_fsinfo_res res = {
4100 .fsinfo = fsinfo,
4101 };
4102 struct rpc_message msg = {
4103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4104 .rpc_argp = &args,
4105 .rpc_resp = &res,
4106 };
4107
4108 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4109}
4110
4111static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4112{
4113 struct nfs4_exception exception = { };
4114 unsigned long now = jiffies;
4115 int err;
4116
4117 do {
4118 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4119 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4120 if (err == 0) {
4121 struct nfs_client *clp = server->nfs_client;
4122
4123 spin_lock(&clp->cl_lock);
4124 clp->cl_lease_time = fsinfo->lease_time * HZ;
4125 clp->cl_last_renewal = now;
4126 spin_unlock(&clp->cl_lock);
4127 break;
4128 }
4129 err = nfs4_handle_exception(server, err, &exception);
4130 } while (exception.retry);
4131 return err;
4132}
4133
4134static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4135{
4136 int error;
4137
4138 nfs_fattr_init(fsinfo->fattr);
4139 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4140 if (error == 0) {
4141 /* block layout checks this! */
4142 server->pnfs_blksize = fsinfo->blksize;
4143 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4144 }
4145
4146 return error;
4147}
4148
4149static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4150 struct nfs_pathconf *pathconf)
4151{
4152 struct nfs4_pathconf_arg args = {
4153 .fh = fhandle,
4154 .bitmask = server->attr_bitmask,
4155 };
4156 struct nfs4_pathconf_res res = {
4157 .pathconf = pathconf,
4158 };
4159 struct rpc_message msg = {
4160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4161 .rpc_argp = &args,
4162 .rpc_resp = &res,
4163 };
4164
4165 /* None of the pathconf attributes are mandatory to implement */
4166 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4167 memset(pathconf, 0, sizeof(*pathconf));
4168 return 0;
4169 }
4170
4171 nfs_fattr_init(pathconf->fattr);
4172 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4173}
4174
4175static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4176 struct nfs_pathconf *pathconf)
4177{
4178 struct nfs4_exception exception = { };
4179 int err;
4180
4181 do {
4182 err = nfs4_handle_exception(server,
4183 _nfs4_proc_pathconf(server, fhandle, pathconf),
4184 &exception);
4185 } while (exception.retry);
4186 return err;
4187}
4188
4189int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4190 const struct nfs_open_context *ctx,
4191 const struct nfs_lock_context *l_ctx,
4192 fmode_t fmode)
4193{
4194 const struct nfs_lockowner *lockowner = NULL;
4195
4196 if (l_ctx != NULL)
4197 lockowner = &l_ctx->lockowner;
4198 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4199}
4200EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4201
4202static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4203 const struct nfs_open_context *ctx,
4204 const struct nfs_lock_context *l_ctx,
4205 fmode_t fmode)
4206{
4207 nfs4_stateid current_stateid;
4208
4209 /* If the current stateid represents a lost lock, then exit */
4210 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4211 return true;
4212 return nfs4_stateid_match(stateid, &current_stateid);
4213}
4214
4215static bool nfs4_error_stateid_expired(int err)
4216{
4217 switch (err) {
4218 case -NFS4ERR_DELEG_REVOKED:
4219 case -NFS4ERR_ADMIN_REVOKED:
4220 case -NFS4ERR_BAD_STATEID:
4221 case -NFS4ERR_STALE_STATEID:
4222 case -NFS4ERR_OLD_STATEID:
4223 case -NFS4ERR_OPENMODE:
4224 case -NFS4ERR_EXPIRED:
4225 return true;
4226 }
4227 return false;
4228}
4229
4230void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4231{
4232 nfs_invalidate_atime(hdr->inode);
4233}
4234
4235static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4236{
4237 struct nfs_server *server = NFS_SERVER(hdr->inode);
4238
4239 trace_nfs4_read(hdr, task->tk_status);
4240 if (nfs4_async_handle_error(task, server,
4241 hdr->args.context->state,
4242 NULL) == -EAGAIN) {
4243 rpc_restart_call_prepare(task);
4244 return -EAGAIN;
4245 }
4246
4247 __nfs4_read_done_cb(hdr);
4248 if (task->tk_status > 0)
4249 renew_lease(server, hdr->timestamp);
4250 return 0;
4251}
4252
4253static bool nfs4_read_stateid_changed(struct rpc_task *task,
4254 struct nfs_pgio_args *args)
4255{
4256
4257 if (!nfs4_error_stateid_expired(task->tk_status) ||
4258 nfs4_stateid_is_current(&args->stateid,
4259 args->context,
4260 args->lock_context,
4261 FMODE_READ))
4262 return false;
4263 rpc_restart_call_prepare(task);
4264 return true;
4265}
4266
4267static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4268{
4269
4270 dprintk("--> %s\n", __func__);
4271
4272 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4273 return -EAGAIN;
4274 if (nfs4_read_stateid_changed(task, &hdr->args))
4275 return -EAGAIN;
4276 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4277 nfs4_read_done_cb(task, hdr);
4278}
4279
4280static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4281 struct rpc_message *msg)
4282{
4283 hdr->timestamp = jiffies;
4284 hdr->pgio_done_cb = nfs4_read_done_cb;
4285 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4286 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4287}
4288
4289static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4290 struct nfs_pgio_header *hdr)
4291{
4292 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4293 &hdr->args.seq_args,
4294 &hdr->res.seq_res,
4295 task))
4296 return 0;
4297 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4298 hdr->args.lock_context,
4299 hdr->rw_ops->rw_mode) == -EIO)
4300 return -EIO;
4301 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4302 return -EIO;
4303 return 0;
4304}
4305
4306static int nfs4_write_done_cb(struct rpc_task *task,
4307 struct nfs_pgio_header *hdr)
4308{
4309 struct inode *inode = hdr->inode;
4310
4311 trace_nfs4_write(hdr, task->tk_status);
4312 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4313 hdr->args.context->state,
4314 NULL) == -EAGAIN) {
4315 rpc_restart_call_prepare(task);
4316 return -EAGAIN;
4317 }
4318 if (task->tk_status >= 0) {
4319 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4320 nfs_writeback_update_inode(hdr);
4321 }
4322 return 0;
4323}
4324
4325static bool nfs4_write_stateid_changed(struct rpc_task *task,
4326 struct nfs_pgio_args *args)
4327{
4328
4329 if (!nfs4_error_stateid_expired(task->tk_status) ||
4330 nfs4_stateid_is_current(&args->stateid,
4331 args->context,
4332 args->lock_context,
4333 FMODE_WRITE))
4334 return false;
4335 rpc_restart_call_prepare(task);
4336 return true;
4337}
4338
4339static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4340{
4341 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4342 return -EAGAIN;
4343 if (nfs4_write_stateid_changed(task, &hdr->args))
4344 return -EAGAIN;
4345 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4346 nfs4_write_done_cb(task, hdr);
4347}
4348
4349static
4350bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4351{
4352 /* Don't request attributes for pNFS or O_DIRECT writes */
4353 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4354 return false;
4355 /* Otherwise, request attributes if and only if we don't hold
4356 * a delegation
4357 */
4358 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4359}
4360
4361static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4362 struct rpc_message *msg)
4363{
4364 struct nfs_server *server = NFS_SERVER(hdr->inode);
4365
4366 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4367 hdr->args.bitmask = NULL;
4368 hdr->res.fattr = NULL;
4369 } else
4370 hdr->args.bitmask = server->cache_consistency_bitmask;
4371
4372 if (!hdr->pgio_done_cb)
4373 hdr->pgio_done_cb = nfs4_write_done_cb;
4374 hdr->res.server = server;
4375 hdr->timestamp = jiffies;
4376
4377 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4378 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4379}
4380
4381static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4382{
4383 nfs4_setup_sequence(NFS_SERVER(data->inode),
4384 &data->args.seq_args,
4385 &data->res.seq_res,
4386 task);
4387}
4388
4389static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4390{
4391 struct inode *inode = data->inode;
4392
4393 trace_nfs4_commit(data, task->tk_status);
4394 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4395 NULL, NULL) == -EAGAIN) {
4396 rpc_restart_call_prepare(task);
4397 return -EAGAIN;
4398 }
4399 return 0;
4400}
4401
4402static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4403{
4404 if (!nfs4_sequence_done(task, &data->res.seq_res))
4405 return -EAGAIN;
4406 return data->commit_done_cb(task, data);
4407}
4408
4409static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4410{
4411 struct nfs_server *server = NFS_SERVER(data->inode);
4412
4413 if (data->commit_done_cb == NULL)
4414 data->commit_done_cb = nfs4_commit_done_cb;
4415 data->res.server = server;
4416 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4417 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4418}
4419
4420struct nfs4_renewdata {
4421 struct nfs_client *client;
4422 unsigned long timestamp;
4423};
4424
4425/*
4426 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4427 * standalone procedure for queueing an asynchronous RENEW.
4428 */
4429static void nfs4_renew_release(void *calldata)
4430{
4431 struct nfs4_renewdata *data = calldata;
4432 struct nfs_client *clp = data->client;
4433
4434 if (atomic_read(&clp->cl_count) > 1)
4435 nfs4_schedule_state_renewal(clp);
4436 nfs_put_client(clp);
4437 kfree(data);
4438}
4439
4440static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4441{
4442 struct nfs4_renewdata *data = calldata;
4443 struct nfs_client *clp = data->client;
4444 unsigned long timestamp = data->timestamp;
4445
4446 trace_nfs4_renew_async(clp, task->tk_status);
4447 switch (task->tk_status) {
4448 case 0:
4449 break;
4450 case -NFS4ERR_LEASE_MOVED:
4451 nfs4_schedule_lease_moved_recovery(clp);
4452 break;
4453 default:
4454 /* Unless we're shutting down, schedule state recovery! */
4455 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4456 return;
4457 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4458 nfs4_schedule_lease_recovery(clp);
4459 return;
4460 }
4461 nfs4_schedule_path_down_recovery(clp);
4462 }
4463 do_renew_lease(clp, timestamp);
4464}
4465
4466static const struct rpc_call_ops nfs4_renew_ops = {
4467 .rpc_call_done = nfs4_renew_done,
4468 .rpc_release = nfs4_renew_release,
4469};
4470
4471static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4472{
4473 struct rpc_message msg = {
4474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4475 .rpc_argp = clp,
4476 .rpc_cred = cred,
4477 };
4478 struct nfs4_renewdata *data;
4479
4480 if (renew_flags == 0)
4481 return 0;
4482 if (!atomic_inc_not_zero(&clp->cl_count))
4483 return -EIO;
4484 data = kmalloc(sizeof(*data), GFP_NOFS);
4485 if (data == NULL)
4486 return -ENOMEM;
4487 data->client = clp;
4488 data->timestamp = jiffies;
4489 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4490 &nfs4_renew_ops, data);
4491}
4492
4493static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4494{
4495 struct rpc_message msg = {
4496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4497 .rpc_argp = clp,
4498 .rpc_cred = cred,
4499 };
4500 unsigned long now = jiffies;
4501 int status;
4502
4503 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4504 if (status < 0)
4505 return status;
4506 do_renew_lease(clp, now);
4507 return 0;
4508}
4509
4510static inline int nfs4_server_supports_acls(struct nfs_server *server)
4511{
4512 return server->caps & NFS_CAP_ACLS;
4513}
4514
4515/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4516 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4517 * the stack.
4518 */
4519#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4520
4521static int buf_to_pages_noslab(const void *buf, size_t buflen,
4522 struct page **pages, unsigned int *pgbase)
4523{
4524 struct page *newpage, **spages;
4525 int rc = 0;
4526 size_t len;
4527 spages = pages;
4528
4529 do {
4530 len = min_t(size_t, PAGE_SIZE, buflen);
4531 newpage = alloc_page(GFP_KERNEL);
4532
4533 if (newpage == NULL)
4534 goto unwind;
4535 memcpy(page_address(newpage), buf, len);
4536 buf += len;
4537 buflen -= len;
4538 *pages++ = newpage;
4539 rc++;
4540 } while (buflen != 0);
4541
4542 return rc;
4543
4544unwind:
4545 for(; rc > 0; rc--)
4546 __free_page(spages[rc-1]);
4547 return -ENOMEM;
4548}
4549
4550struct nfs4_cached_acl {
4551 int cached;
4552 size_t len;
4553 char data[0];
4554};
4555
4556static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4557{
4558 struct nfs_inode *nfsi = NFS_I(inode);
4559
4560 spin_lock(&inode->i_lock);
4561 kfree(nfsi->nfs4_acl);
4562 nfsi->nfs4_acl = acl;
4563 spin_unlock(&inode->i_lock);
4564}
4565
4566static void nfs4_zap_acl_attr(struct inode *inode)
4567{
4568 nfs4_set_cached_acl(inode, NULL);
4569}
4570
4571static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4572{
4573 struct nfs_inode *nfsi = NFS_I(inode);
4574 struct nfs4_cached_acl *acl;
4575 int ret = -ENOENT;
4576
4577 spin_lock(&inode->i_lock);
4578 acl = nfsi->nfs4_acl;
4579 if (acl == NULL)
4580 goto out;
4581 if (buf == NULL) /* user is just asking for length */
4582 goto out_len;
4583 if (acl->cached == 0)
4584 goto out;
4585 ret = -ERANGE; /* see getxattr(2) man page */
4586 if (acl->len > buflen)
4587 goto out;
4588 memcpy(buf, acl->data, acl->len);
4589out_len:
4590 ret = acl->len;
4591out:
4592 spin_unlock(&inode->i_lock);
4593 return ret;
4594}
4595
4596static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4597{
4598 struct nfs4_cached_acl *acl;
4599 size_t buflen = sizeof(*acl) + acl_len;
4600
4601 if (buflen <= PAGE_SIZE) {
4602 acl = kmalloc(buflen, GFP_KERNEL);
4603 if (acl == NULL)
4604 goto out;
4605 acl->cached = 1;
4606 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4607 } else {
4608 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4609 if (acl == NULL)
4610 goto out;
4611 acl->cached = 0;
4612 }
4613 acl->len = acl_len;
4614out:
4615 nfs4_set_cached_acl(inode, acl);
4616}
4617
4618/*
4619 * The getxattr API returns the required buffer length when called with a
4620 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4621 * the required buf. On a NULL buf, we send a page of data to the server
4622 * guessing that the ACL request can be serviced by a page. If so, we cache
4623 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4624 * the cache. If not so, we throw away the page, and cache the required
4625 * length. The next getxattr call will then produce another round trip to
4626 * the server, this time with the input buf of the required size.
4627 */
4628static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4629{
4630 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4631 struct nfs_getaclargs args = {
4632 .fh = NFS_FH(inode),
4633 .acl_pages = pages,
4634 .acl_len = buflen,
4635 };
4636 struct nfs_getaclres res = {
4637 .acl_len = buflen,
4638 };
4639 struct rpc_message msg = {
4640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4641 .rpc_argp = &args,
4642 .rpc_resp = &res,
4643 };
4644 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4645 int ret = -ENOMEM, i;
4646
4647 /* As long as we're doing a round trip to the server anyway,
4648 * let's be prepared for a page of acl data. */
4649 if (npages == 0)
4650 npages = 1;
4651 if (npages > ARRAY_SIZE(pages))
4652 return -ERANGE;
4653
4654 for (i = 0; i < npages; i++) {
4655 pages[i] = alloc_page(GFP_KERNEL);
4656 if (!pages[i])
4657 goto out_free;
4658 }
4659
4660 /* for decoding across pages */
4661 res.acl_scratch = alloc_page(GFP_KERNEL);
4662 if (!res.acl_scratch)
4663 goto out_free;
4664
4665 args.acl_len = npages * PAGE_SIZE;
4666 args.acl_pgbase = 0;
4667
4668 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4669 __func__, buf, buflen, npages, args.acl_len);
4670 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4671 &msg, &args.seq_args, &res.seq_res, 0);
4672 if (ret)
4673 goto out_free;
4674
4675 /* Handle the case where the passed-in buffer is too short */
4676 if (res.acl_flags & NFS4_ACL_TRUNC) {
4677 /* Did the user only issue a request for the acl length? */
4678 if (buf == NULL)
4679 goto out_ok;
4680 ret = -ERANGE;
4681 goto out_free;
4682 }
4683 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4684 if (buf) {
4685 if (res.acl_len > buflen) {
4686 ret = -ERANGE;
4687 goto out_free;
4688 }
4689 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4690 }
4691out_ok:
4692 ret = res.acl_len;
4693out_free:
4694 for (i = 0; i < npages; i++)
4695 if (pages[i])
4696 __free_page(pages[i]);
4697 if (res.acl_scratch)
4698 __free_page(res.acl_scratch);
4699 return ret;
4700}
4701
4702static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4703{
4704 struct nfs4_exception exception = { };
4705 ssize_t ret;
4706 do {
4707 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4708 trace_nfs4_get_acl(inode, ret);
4709 if (ret >= 0)
4710 break;
4711 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4712 } while (exception.retry);
4713 return ret;
4714}
4715
4716static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4717{
4718 struct nfs_server *server = NFS_SERVER(inode);
4719 int ret;
4720
4721 if (!nfs4_server_supports_acls(server))
4722 return -EOPNOTSUPP;
4723 ret = nfs_revalidate_inode(server, inode);
4724 if (ret < 0)
4725 return ret;
4726 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4727 nfs_zap_acl_cache(inode);
4728 ret = nfs4_read_cached_acl(inode, buf, buflen);
4729 if (ret != -ENOENT)
4730 /* -ENOENT is returned if there is no ACL or if there is an ACL
4731 * but no cached acl data, just the acl length */
4732 return ret;
4733 return nfs4_get_acl_uncached(inode, buf, buflen);
4734}
4735
4736static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4737{
4738 struct nfs_server *server = NFS_SERVER(inode);
4739 struct page *pages[NFS4ACL_MAXPAGES];
4740 struct nfs_setaclargs arg = {
4741 .fh = NFS_FH(inode),
4742 .acl_pages = pages,
4743 .acl_len = buflen,
4744 };
4745 struct nfs_setaclres res;
4746 struct rpc_message msg = {
4747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4748 .rpc_argp = &arg,
4749 .rpc_resp = &res,
4750 };
4751 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4752 int ret, i;
4753
4754 if (!nfs4_server_supports_acls(server))
4755 return -EOPNOTSUPP;
4756 if (npages > ARRAY_SIZE(pages))
4757 return -ERANGE;
4758 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4759 if (i < 0)
4760 return i;
4761 nfs4_inode_return_delegation(inode);
4762 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4763
4764 /*
4765 * Free each page after tx, so the only ref left is
4766 * held by the network stack
4767 */
4768 for (; i > 0; i--)
4769 put_page(pages[i-1]);
4770
4771 /*
4772 * Acl update can result in inode attribute update.
4773 * so mark the attribute cache invalid.
4774 */
4775 spin_lock(&inode->i_lock);
4776 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4777 spin_unlock(&inode->i_lock);
4778 nfs_access_zap_cache(inode);
4779 nfs_zap_acl_cache(inode);
4780 return ret;
4781}
4782
4783static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4784{
4785 struct nfs4_exception exception = { };
4786 int err;
4787 do {
4788 err = __nfs4_proc_set_acl(inode, buf, buflen);
4789 trace_nfs4_set_acl(inode, err);
4790 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4791 &exception);
4792 } while (exception.retry);
4793 return err;
4794}
4795
4796#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4797static int _nfs4_get_security_label(struct inode *inode, void *buf,
4798 size_t buflen)
4799{
4800 struct nfs_server *server = NFS_SERVER(inode);
4801 struct nfs_fattr fattr;
4802 struct nfs4_label label = {0, 0, buflen, buf};
4803
4804 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4805 struct nfs4_getattr_arg arg = {
4806 .fh = NFS_FH(inode),
4807 .bitmask = bitmask,
4808 };
4809 struct nfs4_getattr_res res = {
4810 .fattr = &fattr,
4811 .label = &label,
4812 .server = server,
4813 };
4814 struct rpc_message msg = {
4815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4816 .rpc_argp = &arg,
4817 .rpc_resp = &res,
4818 };
4819 int ret;
4820
4821 nfs_fattr_init(&fattr);
4822
4823 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4824 if (ret)
4825 return ret;
4826 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4827 return -ENOENT;
4828 if (buflen < label.len)
4829 return -ERANGE;
4830 return 0;
4831}
4832
4833static int nfs4_get_security_label(struct inode *inode, void *buf,
4834 size_t buflen)
4835{
4836 struct nfs4_exception exception = { };
4837 int err;
4838
4839 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4840 return -EOPNOTSUPP;
4841
4842 do {
4843 err = _nfs4_get_security_label(inode, buf, buflen);
4844 trace_nfs4_get_security_label(inode, err);
4845 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4846 &exception);
4847 } while (exception.retry);
4848 return err;
4849}
4850
4851static int _nfs4_do_set_security_label(struct inode *inode,
4852 struct nfs4_label *ilabel,
4853 struct nfs_fattr *fattr,
4854 struct nfs4_label *olabel)
4855{
4856
4857 struct iattr sattr = {0};
4858 struct nfs_server *server = NFS_SERVER(inode);
4859 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4860 struct nfs_setattrargs arg = {
4861 .fh = NFS_FH(inode),
4862 .iap = &sattr,
4863 .server = server,
4864 .bitmask = bitmask,
4865 .label = ilabel,
4866 };
4867 struct nfs_setattrres res = {
4868 .fattr = fattr,
4869 .label = olabel,
4870 .server = server,
4871 };
4872 struct rpc_message msg = {
4873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4874 .rpc_argp = &arg,
4875 .rpc_resp = &res,
4876 };
4877 int status;
4878
4879 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4880
4881 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4882 if (status)
4883 dprintk("%s failed: %d\n", __func__, status);
4884
4885 return status;
4886}
4887
4888static int nfs4_do_set_security_label(struct inode *inode,
4889 struct nfs4_label *ilabel,
4890 struct nfs_fattr *fattr,
4891 struct nfs4_label *olabel)
4892{
4893 struct nfs4_exception exception = { };
4894 int err;
4895
4896 do {
4897 err = _nfs4_do_set_security_label(inode, ilabel,
4898 fattr, olabel);
4899 trace_nfs4_set_security_label(inode, err);
4900 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4901 &exception);
4902 } while (exception.retry);
4903 return err;
4904}
4905
4906static int
4907nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4908{
4909 struct nfs4_label ilabel, *olabel = NULL;
4910 struct nfs_fattr fattr;
4911 struct rpc_cred *cred;
4912 struct inode *inode = d_inode(dentry);
4913 int status;
4914
4915 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4916 return -EOPNOTSUPP;
4917
4918 nfs_fattr_init(&fattr);
4919
4920 ilabel.pi = 0;
4921 ilabel.lfs = 0;
4922 ilabel.label = (char *)buf;
4923 ilabel.len = buflen;
4924
4925 cred = rpc_lookup_cred();
4926 if (IS_ERR(cred))
4927 return PTR_ERR(cred);
4928
4929 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4930 if (IS_ERR(olabel)) {
4931 status = -PTR_ERR(olabel);
4932 goto out;
4933 }
4934
4935 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4936 if (status == 0)
4937 nfs_setsecurity(inode, &fattr, olabel);
4938
4939 nfs4_label_free(olabel);
4940out:
4941 put_rpccred(cred);
4942 return status;
4943}
4944#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4945
4946
4947static int
4948nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4949 struct nfs4_state *state, long *timeout)
4950{
4951 struct nfs_client *clp = server->nfs_client;
4952
4953 if (task->tk_status >= 0)
4954 return 0;
4955 switch(task->tk_status) {
4956 case -NFS4ERR_DELEG_REVOKED:
4957 case -NFS4ERR_ADMIN_REVOKED:
4958 case -NFS4ERR_BAD_STATEID:
4959 case -NFS4ERR_OPENMODE:
4960 if (state == NULL)
4961 break;
4962 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4963 goto recovery_failed;
4964 goto wait_on_recovery;
4965 case -NFS4ERR_EXPIRED:
4966 if (state != NULL) {
4967 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4968 goto recovery_failed;
4969 }
4970 case -NFS4ERR_STALE_STATEID:
4971 case -NFS4ERR_STALE_CLIENTID:
4972 nfs4_schedule_lease_recovery(clp);
4973 goto wait_on_recovery;
4974 case -NFS4ERR_MOVED:
4975 if (nfs4_schedule_migration_recovery(server) < 0)
4976 goto recovery_failed;
4977 goto wait_on_recovery;
4978 case -NFS4ERR_LEASE_MOVED:
4979 nfs4_schedule_lease_moved_recovery(clp);
4980 goto wait_on_recovery;
4981#if defined(CONFIG_NFS_V4_1)
4982 case -NFS4ERR_BADSESSION:
4983 case -NFS4ERR_BADSLOT:
4984 case -NFS4ERR_BAD_HIGH_SLOT:
4985 case -NFS4ERR_DEADSESSION:
4986 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4987 case -NFS4ERR_SEQ_FALSE_RETRY:
4988 case -NFS4ERR_SEQ_MISORDERED:
4989 dprintk("%s ERROR %d, Reset session\n", __func__,
4990 task->tk_status);
4991 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4992 goto wait_on_recovery;
4993#endif /* CONFIG_NFS_V4_1 */
4994 case -NFS4ERR_DELAY:
4995 nfs_inc_server_stats(server, NFSIOS_DELAY);
4996 rpc_delay(task, nfs4_update_delay(timeout));
4997 goto restart_call;
4998 case -NFS4ERR_GRACE:
4999 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5000 case -NFS4ERR_RETRY_UNCACHED_REP:
5001 case -NFS4ERR_OLD_STATEID:
5002 goto restart_call;
5003 }
5004 task->tk_status = nfs4_map_errors(task->tk_status);
5005 return 0;
5006recovery_failed:
5007 task->tk_status = -EIO;
5008 return 0;
5009wait_on_recovery:
5010 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
5011 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5012 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
5013 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5014 goto recovery_failed;
5015restart_call:
5016 task->tk_status = 0;
5017 return -EAGAIN;
5018}
5019
5020static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5021 nfs4_verifier *bootverf)
5022{
5023 __be32 verf[2];
5024
5025 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5026 /* An impossible timestamp guarantees this value
5027 * will never match a generated boot time. */
5028 verf[0] = 0;
5029 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
5030 } else {
5031 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5032 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5033 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
5034 }
5035 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5036}
5037
5038static int
5039nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5040{
5041 int result;
5042 size_t len;
5043 char *str;
5044
5045 if (clp->cl_owner_id != NULL)
5046 return 0;
5047
5048 rcu_read_lock();
5049 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5050 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5051 1 +
5052 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5053 1;
5054 rcu_read_unlock();
5055
5056 if (len > NFS4_OPAQUE_LIMIT + 1)
5057 return -EINVAL;
5058
5059 /*
5060 * Since this string is allocated at mount time, and held until the
5061 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5062 * about a memory-reclaim deadlock.
5063 */
5064 str = kmalloc(len, GFP_KERNEL);
5065 if (!str)
5066 return -ENOMEM;
5067
5068 rcu_read_lock();
5069 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5070 clp->cl_ipaddr,
5071 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5072 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5073 rcu_read_unlock();
5074
5075 clp->cl_owner_id = str;
5076 return 0;
5077}
5078
5079static int
5080nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5081{
5082 int result;
5083 size_t len;
5084 char *str;
5085
5086 len = 10 + 10 + 1 + 10 + 1 +
5087 strlen(nfs4_client_id_uniquifier) + 1 +
5088 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5089
5090 if (len > NFS4_OPAQUE_LIMIT + 1)
5091 return -EINVAL;
5092
5093 /*
5094 * Since this string is allocated at mount time, and held until the
5095 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5096 * about a memory-reclaim deadlock.
5097 */
5098 str = kmalloc(len, GFP_KERNEL);
5099 if (!str)
5100 return -ENOMEM;
5101
5102 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5103 clp->rpc_ops->version, clp->cl_minorversion,
5104 nfs4_client_id_uniquifier,
5105 clp->cl_rpcclient->cl_nodename);
5106 clp->cl_owner_id = str;
5107 return 0;
5108}
5109
5110static int
5111nfs4_init_uniform_client_string(struct nfs_client *clp)
5112{
5113 int result;
5114 size_t len;
5115 char *str;
5116
5117 if (clp->cl_owner_id != NULL)
5118 return 0;
5119
5120 if (nfs4_client_id_uniquifier[0] != '\0')
5121 return nfs4_init_uniquifier_client_string(clp);
5122
5123 len = 10 + 10 + 1 + 10 + 1 +
5124 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5125
5126 if (len > NFS4_OPAQUE_LIMIT + 1)
5127 return -EINVAL;
5128
5129 /*
5130 * Since this string is allocated at mount time, and held until the
5131 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5132 * about a memory-reclaim deadlock.
5133 */
5134 str = kmalloc(len, GFP_KERNEL);
5135 if (!str)
5136 return -ENOMEM;
5137
5138 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5139 clp->rpc_ops->version, clp->cl_minorversion,
5140 clp->cl_rpcclient->cl_nodename);
5141 clp->cl_owner_id = str;
5142 return 0;
5143}
5144
5145/*
5146 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5147 * services. Advertise one based on the address family of the
5148 * clientaddr.
5149 */
5150static unsigned int
5151nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5152{
5153 if (strchr(clp->cl_ipaddr, ':') != NULL)
5154 return scnprintf(buf, len, "tcp6");
5155 else
5156 return scnprintf(buf, len, "tcp");
5157}
5158
5159static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5160{
5161 struct nfs4_setclientid *sc = calldata;
5162
5163 if (task->tk_status == 0)
5164 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5165}
5166
5167static const struct rpc_call_ops nfs4_setclientid_ops = {
5168 .rpc_call_done = nfs4_setclientid_done,
5169};
5170
5171/**
5172 * nfs4_proc_setclientid - Negotiate client ID
5173 * @clp: state data structure
5174 * @program: RPC program for NFSv4 callback service
5175 * @port: IP port number for NFS4 callback service
5176 * @cred: RPC credential to use for this call
5177 * @res: where to place the result
5178 *
5179 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5180 */
5181int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5182 unsigned short port, struct rpc_cred *cred,
5183 struct nfs4_setclientid_res *res)
5184{
5185 nfs4_verifier sc_verifier;
5186 struct nfs4_setclientid setclientid = {
5187 .sc_verifier = &sc_verifier,
5188 .sc_prog = program,
5189 .sc_clnt = clp,
5190 };
5191 struct rpc_message msg = {
5192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5193 .rpc_argp = &setclientid,
5194 .rpc_resp = res,
5195 .rpc_cred = cred,
5196 };
5197 struct rpc_task *task;
5198 struct rpc_task_setup task_setup_data = {
5199 .rpc_client = clp->cl_rpcclient,
5200 .rpc_message = &msg,
5201 .callback_ops = &nfs4_setclientid_ops,
5202 .callback_data = &setclientid,
5203 .flags = RPC_TASK_TIMEOUT,
5204 };
5205 int status;
5206
5207 /* nfs_client_id4 */
5208 nfs4_init_boot_verifier(clp, &sc_verifier);
5209
5210 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5211 status = nfs4_init_uniform_client_string(clp);
5212 else
5213 status = nfs4_init_nonuniform_client_string(clp);
5214
5215 if (status)
5216 goto out;
5217
5218 /* cb_client4 */
5219 setclientid.sc_netid_len =
5220 nfs4_init_callback_netid(clp,
5221 setclientid.sc_netid,
5222 sizeof(setclientid.sc_netid));
5223 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5224 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5225 clp->cl_ipaddr, port >> 8, port & 255);
5226
5227 dprintk("NFS call setclientid auth=%s, '%s'\n",
5228 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5229 clp->cl_owner_id);
5230 task = rpc_run_task(&task_setup_data);
5231 if (IS_ERR(task)) {
5232 status = PTR_ERR(task);
5233 goto out;
5234 }
5235 status = task->tk_status;
5236 if (setclientid.sc_cred) {
5237 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5238 put_rpccred(setclientid.sc_cred);
5239 }
5240 rpc_put_task(task);
5241out:
5242 trace_nfs4_setclientid(clp, status);
5243 dprintk("NFS reply setclientid: %d\n", status);
5244 return status;
5245}
5246
5247/**
5248 * nfs4_proc_setclientid_confirm - Confirm client ID
5249 * @clp: state data structure
5250 * @res: result of a previous SETCLIENTID
5251 * @cred: RPC credential to use for this call
5252 *
5253 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5254 */
5255int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5256 struct nfs4_setclientid_res *arg,
5257 struct rpc_cred *cred)
5258{
5259 struct rpc_message msg = {
5260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5261 .rpc_argp = arg,
5262 .rpc_cred = cred,
5263 };
5264 int status;
5265
5266 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5267 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5268 clp->cl_clientid);
5269 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5270 trace_nfs4_setclientid_confirm(clp, status);
5271 dprintk("NFS reply setclientid_confirm: %d\n", status);
5272 return status;
5273}
5274
5275struct nfs4_delegreturndata {
5276 struct nfs4_delegreturnargs args;
5277 struct nfs4_delegreturnres res;
5278 struct nfs_fh fh;
5279 nfs4_stateid stateid;
5280 unsigned long timestamp;
5281 struct nfs_fattr fattr;
5282 int rpc_status;
5283 struct inode *inode;
5284 bool roc;
5285 u32 roc_barrier;
5286};
5287
5288static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5289{
5290 struct nfs4_delegreturndata *data = calldata;
5291
5292 if (!nfs4_sequence_done(task, &data->res.seq_res))
5293 return;
5294
5295 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5296 switch (task->tk_status) {
5297 case 0:
5298 renew_lease(data->res.server, data->timestamp);
5299 case -NFS4ERR_ADMIN_REVOKED:
5300 case -NFS4ERR_DELEG_REVOKED:
5301 case -NFS4ERR_BAD_STATEID:
5302 case -NFS4ERR_OLD_STATEID:
5303 case -NFS4ERR_STALE_STATEID:
5304 case -NFS4ERR_EXPIRED:
5305 task->tk_status = 0;
5306 if (data->roc)
5307 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5308 break;
5309 default:
5310 if (nfs4_async_handle_error(task, data->res.server,
5311 NULL, NULL) == -EAGAIN) {
5312 rpc_restart_call_prepare(task);
5313 return;
5314 }
5315 }
5316 data->rpc_status = task->tk_status;
5317}
5318
5319static void nfs4_delegreturn_release(void *calldata)
5320{
5321 struct nfs4_delegreturndata *data = calldata;
5322 struct inode *inode = data->inode;
5323
5324 if (inode) {
5325 if (data->roc)
5326 pnfs_roc_release(inode);
5327 nfs_iput_and_deactive(inode);
5328 }
5329 kfree(calldata);
5330}
5331
5332static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5333{
5334 struct nfs4_delegreturndata *d_data;
5335
5336 d_data = (struct nfs4_delegreturndata *)data;
5337
5338 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5339 return;
5340
5341 if (d_data->roc)
5342 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5343
5344 nfs4_setup_sequence(d_data->res.server,
5345 &d_data->args.seq_args,
5346 &d_data->res.seq_res,
5347 task);
5348}
5349
5350static const struct rpc_call_ops nfs4_delegreturn_ops = {
5351 .rpc_call_prepare = nfs4_delegreturn_prepare,
5352 .rpc_call_done = nfs4_delegreturn_done,
5353 .rpc_release = nfs4_delegreturn_release,
5354};
5355
5356static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5357{
5358 struct nfs4_delegreturndata *data;
5359 struct nfs_server *server = NFS_SERVER(inode);
5360 struct rpc_task *task;
5361 struct rpc_message msg = {
5362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5363 .rpc_cred = cred,
5364 };
5365 struct rpc_task_setup task_setup_data = {
5366 .rpc_client = server->client,
5367 .rpc_message = &msg,
5368 .callback_ops = &nfs4_delegreturn_ops,
5369 .flags = RPC_TASK_ASYNC,
5370 };
5371 int status = 0;
5372
5373 data = kzalloc(sizeof(*data), GFP_NOFS);
5374 if (data == NULL)
5375 return -ENOMEM;
5376 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5377 data->args.fhandle = &data->fh;
5378 data->args.stateid = &data->stateid;
5379 data->args.bitmask = server->cache_consistency_bitmask;
5380 nfs_copy_fh(&data->fh, NFS_FH(inode));
5381 nfs4_stateid_copy(&data->stateid, stateid);
5382 data->res.fattr = &data->fattr;
5383 data->res.server = server;
5384 nfs_fattr_init(data->res.fattr);
5385 data->timestamp = jiffies;
5386 data->rpc_status = 0;
5387 data->inode = nfs_igrab_and_active(inode);
5388 if (data->inode)
5389 data->roc = nfs4_roc(inode);
5390
5391 task_setup_data.callback_data = data;
5392 msg.rpc_argp = &data->args;
5393 msg.rpc_resp = &data->res;
5394 task = rpc_run_task(&task_setup_data);
5395 if (IS_ERR(task))
5396 return PTR_ERR(task);
5397 if (!issync)
5398 goto out;
5399 status = nfs4_wait_for_completion_rpc_task(task);
5400 if (status != 0)
5401 goto out;
5402 status = data->rpc_status;
5403 if (status == 0)
5404 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5405 else
5406 nfs_refresh_inode(inode, &data->fattr);
5407out:
5408 rpc_put_task(task);
5409 return status;
5410}
5411
5412int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5413{
5414 struct nfs_server *server = NFS_SERVER(inode);
5415 struct nfs4_exception exception = { };
5416 int err;
5417 do {
5418 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5419 trace_nfs4_delegreturn(inode, err);
5420 switch (err) {
5421 case -NFS4ERR_STALE_STATEID:
5422 case -NFS4ERR_EXPIRED:
5423 case 0:
5424 return 0;
5425 }
5426 err = nfs4_handle_exception(server, err, &exception);
5427 } while (exception.retry);
5428 return err;
5429}
5430
5431#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5432#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5433
5434/*
5435 * sleep, with exponential backoff, and retry the LOCK operation.
5436 */
5437static unsigned long
5438nfs4_set_lock_task_retry(unsigned long timeout)
5439{
5440 freezable_schedule_timeout_killable_unsafe(timeout);
5441 timeout <<= 1;
5442 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5443 return NFS4_LOCK_MAXTIMEOUT;
5444 return timeout;
5445}
5446
5447static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5448{
5449 struct inode *inode = state->inode;
5450 struct nfs_server *server = NFS_SERVER(inode);
5451 struct nfs_client *clp = server->nfs_client;
5452 struct nfs_lockt_args arg = {
5453 .fh = NFS_FH(inode),
5454 .fl = request,
5455 };
5456 struct nfs_lockt_res res = {
5457 .denied = request,
5458 };
5459 struct rpc_message msg = {
5460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5461 .rpc_argp = &arg,
5462 .rpc_resp = &res,
5463 .rpc_cred = state->owner->so_cred,
5464 };
5465 struct nfs4_lock_state *lsp;
5466 int status;
5467
5468 arg.lock_owner.clientid = clp->cl_clientid;
5469 status = nfs4_set_lock_state(state, request);
5470 if (status != 0)
5471 goto out;
5472 lsp = request->fl_u.nfs4_fl.owner;
5473 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5474 arg.lock_owner.s_dev = server->s_dev;
5475 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5476 switch (status) {
5477 case 0:
5478 request->fl_type = F_UNLCK;
5479 break;
5480 case -NFS4ERR_DENIED:
5481 status = 0;
5482 }
5483 request->fl_ops->fl_release_private(request);
5484 request->fl_ops = NULL;
5485out:
5486 return status;
5487}
5488
5489static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5490{
5491 struct nfs4_exception exception = { };
5492 int err;
5493
5494 do {
5495 err = _nfs4_proc_getlk(state, cmd, request);
5496 trace_nfs4_get_lock(request, state, cmd, err);
5497 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5498 &exception);
5499 } while (exception.retry);
5500 return err;
5501}
5502
5503static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
5504{
5505 int res = 0;
5506 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5507 case FL_POSIX:
5508 res = posix_lock_inode_wait(inode, fl);
5509 break;
5510 case FL_FLOCK:
5511 res = flock_lock_inode_wait(inode, fl);
5512 break;
5513 default:
5514 BUG();
5515 }
5516 return res;
5517}
5518
5519struct nfs4_unlockdata {
5520 struct nfs_locku_args arg;
5521 struct nfs_locku_res res;
5522 struct nfs4_lock_state *lsp;
5523 struct nfs_open_context *ctx;
5524 struct file_lock fl;
5525 const struct nfs_server *server;
5526 unsigned long timestamp;
5527};
5528
5529static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5530 struct nfs_open_context *ctx,
5531 struct nfs4_lock_state *lsp,
5532 struct nfs_seqid *seqid)
5533{
5534 struct nfs4_unlockdata *p;
5535 struct inode *inode = lsp->ls_state->inode;
5536
5537 p = kzalloc(sizeof(*p), GFP_NOFS);
5538 if (p == NULL)
5539 return NULL;
5540 p->arg.fh = NFS_FH(inode);
5541 p->arg.fl = &p->fl;
5542 p->arg.seqid = seqid;
5543 p->res.seqid = seqid;
5544 p->lsp = lsp;
5545 atomic_inc(&lsp->ls_count);
5546 /* Ensure we don't close file until we're done freeing locks! */
5547 p->ctx = get_nfs_open_context(ctx);
5548 memcpy(&p->fl, fl, sizeof(p->fl));
5549 p->server = NFS_SERVER(inode);
5550 return p;
5551}
5552
5553static void nfs4_locku_release_calldata(void *data)
5554{
5555 struct nfs4_unlockdata *calldata = data;
5556 nfs_free_seqid(calldata->arg.seqid);
5557 nfs4_put_lock_state(calldata->lsp);
5558 put_nfs_open_context(calldata->ctx);
5559 kfree(calldata);
5560}
5561
5562static void nfs4_locku_done(struct rpc_task *task, void *data)
5563{
5564 struct nfs4_unlockdata *calldata = data;
5565
5566 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5567 return;
5568 switch (task->tk_status) {
5569 case 0:
5570 renew_lease(calldata->server, calldata->timestamp);
5571 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
5572 if (nfs4_update_lock_stateid(calldata->lsp,
5573 &calldata->res.stateid))
5574 break;
5575 case -NFS4ERR_BAD_STATEID:
5576 case -NFS4ERR_OLD_STATEID:
5577 case -NFS4ERR_STALE_STATEID:
5578 case -NFS4ERR_EXPIRED:
5579 if (!nfs4_stateid_match(&calldata->arg.stateid,
5580 &calldata->lsp->ls_stateid))
5581 rpc_restart_call_prepare(task);
5582 break;
5583 default:
5584 if (nfs4_async_handle_error(task, calldata->server,
5585 NULL, NULL) == -EAGAIN)
5586 rpc_restart_call_prepare(task);
5587 }
5588 nfs_release_seqid(calldata->arg.seqid);
5589}
5590
5591static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5592{
5593 struct nfs4_unlockdata *calldata = data;
5594
5595 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5596 goto out_wait;
5597 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5598 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5599 /* Note: exit _without_ running nfs4_locku_done */
5600 goto out_no_action;
5601 }
5602 calldata->timestamp = jiffies;
5603 if (nfs4_setup_sequence(calldata->server,
5604 &calldata->arg.seq_args,
5605 &calldata->res.seq_res,
5606 task) != 0)
5607 nfs_release_seqid(calldata->arg.seqid);
5608 return;
5609out_no_action:
5610 task->tk_action = NULL;
5611out_wait:
5612 nfs4_sequence_done(task, &calldata->res.seq_res);
5613}
5614
5615static const struct rpc_call_ops nfs4_locku_ops = {
5616 .rpc_call_prepare = nfs4_locku_prepare,
5617 .rpc_call_done = nfs4_locku_done,
5618 .rpc_release = nfs4_locku_release_calldata,
5619};
5620
5621static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5622 struct nfs_open_context *ctx,
5623 struct nfs4_lock_state *lsp,
5624 struct nfs_seqid *seqid)
5625{
5626 struct nfs4_unlockdata *data;
5627 struct rpc_message msg = {
5628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5629 .rpc_cred = ctx->cred,
5630 };
5631 struct rpc_task_setup task_setup_data = {
5632 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5633 .rpc_message = &msg,
5634 .callback_ops = &nfs4_locku_ops,
5635 .workqueue = nfsiod_workqueue,
5636 .flags = RPC_TASK_ASYNC,
5637 };
5638
5639 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5640 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5641
5642 /* Ensure this is an unlock - when canceling a lock, the
5643 * canceled lock is passed in, and it won't be an unlock.
5644 */
5645 fl->fl_type = F_UNLCK;
5646
5647 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5648 if (data == NULL) {
5649 nfs_free_seqid(seqid);
5650 return ERR_PTR(-ENOMEM);
5651 }
5652
5653 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5654 msg.rpc_argp = &data->arg;
5655 msg.rpc_resp = &data->res;
5656 task_setup_data.callback_data = data;
5657 return rpc_run_task(&task_setup_data);
5658}
5659
5660static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5661{
5662 struct inode *inode = state->inode;
5663 struct nfs4_state_owner *sp = state->owner;
5664 struct nfs_inode *nfsi = NFS_I(inode);
5665 struct nfs_seqid *seqid;
5666 struct nfs4_lock_state *lsp;
5667 struct rpc_task *task;
5668 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5669 int status = 0;
5670 unsigned char fl_flags = request->fl_flags;
5671
5672 status = nfs4_set_lock_state(state, request);
5673 /* Unlock _before_ we do the RPC call */
5674 request->fl_flags |= FL_EXISTS;
5675 /* Exclude nfs_delegation_claim_locks() */
5676 mutex_lock(&sp->so_delegreturn_mutex);
5677 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5678 down_read(&nfsi->rwsem);
5679 if (do_vfs_lock(inode, request) == -ENOENT) {
5680 up_read(&nfsi->rwsem);
5681 mutex_unlock(&sp->so_delegreturn_mutex);
5682 goto out;
5683 }
5684 up_read(&nfsi->rwsem);
5685 mutex_unlock(&sp->so_delegreturn_mutex);
5686 if (status != 0)
5687 goto out;
5688 /* Is this a delegated lock? */
5689 lsp = request->fl_u.nfs4_fl.owner;
5690 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5691 goto out;
5692 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5693 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5694 status = -ENOMEM;
5695 if (IS_ERR(seqid))
5696 goto out;
5697 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5698 status = PTR_ERR(task);
5699 if (IS_ERR(task))
5700 goto out;
5701 status = nfs4_wait_for_completion_rpc_task(task);
5702 rpc_put_task(task);
5703out:
5704 request->fl_flags = fl_flags;
5705 trace_nfs4_unlock(request, state, F_SETLK, status);
5706 return status;
5707}
5708
5709struct nfs4_lockdata {
5710 struct nfs_lock_args arg;
5711 struct nfs_lock_res res;
5712 struct nfs4_lock_state *lsp;
5713 struct nfs_open_context *ctx;
5714 struct file_lock fl;
5715 unsigned long timestamp;
5716 int rpc_status;
5717 int cancelled;
5718 struct nfs_server *server;
5719};
5720
5721static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5722 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5723 gfp_t gfp_mask)
5724{
5725 struct nfs4_lockdata *p;
5726 struct inode *inode = lsp->ls_state->inode;
5727 struct nfs_server *server = NFS_SERVER(inode);
5728 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5729
5730 p = kzalloc(sizeof(*p), gfp_mask);
5731 if (p == NULL)
5732 return NULL;
5733
5734 p->arg.fh = NFS_FH(inode);
5735 p->arg.fl = &p->fl;
5736 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5737 if (IS_ERR(p->arg.open_seqid))
5738 goto out_free;
5739 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5740 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5741 if (IS_ERR(p->arg.lock_seqid))
5742 goto out_free_seqid;
5743 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5744 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5745 p->arg.lock_owner.s_dev = server->s_dev;
5746 p->res.lock_seqid = p->arg.lock_seqid;
5747 p->lsp = lsp;
5748 p->server = server;
5749 atomic_inc(&lsp->ls_count);
5750 p->ctx = get_nfs_open_context(ctx);
5751 get_file(fl->fl_file);
5752 memcpy(&p->fl, fl, sizeof(p->fl));
5753 return p;
5754out_free_seqid:
5755 nfs_free_seqid(p->arg.open_seqid);
5756out_free:
5757 kfree(p);
5758 return NULL;
5759}
5760
5761static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5762{
5763 struct nfs4_lockdata *data = calldata;
5764 struct nfs4_state *state = data->lsp->ls_state;
5765
5766 dprintk("%s: begin!\n", __func__);
5767 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5768 goto out_wait;
5769 /* Do we need to do an open_to_lock_owner? */
5770 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5771 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5772 goto out_release_lock_seqid;
5773 }
5774 nfs4_stateid_copy(&data->arg.open_stateid,
5775 &state->open_stateid);
5776 data->arg.new_lock_owner = 1;
5777 data->res.open_seqid = data->arg.open_seqid;
5778 } else {
5779 data->arg.new_lock_owner = 0;
5780 nfs4_stateid_copy(&data->arg.lock_stateid,
5781 &data->lsp->ls_stateid);
5782 }
5783 if (!nfs4_valid_open_stateid(state)) {
5784 data->rpc_status = -EBADF;
5785 task->tk_action = NULL;
5786 goto out_release_open_seqid;
5787 }
5788 data->timestamp = jiffies;
5789 if (nfs4_setup_sequence(data->server,
5790 &data->arg.seq_args,
5791 &data->res.seq_res,
5792 task) == 0)
5793 return;
5794out_release_open_seqid:
5795 nfs_release_seqid(data->arg.open_seqid);
5796out_release_lock_seqid:
5797 nfs_release_seqid(data->arg.lock_seqid);
5798out_wait:
5799 nfs4_sequence_done(task, &data->res.seq_res);
5800 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5801}
5802
5803static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5804{
5805 struct nfs4_lockdata *data = calldata;
5806 struct nfs4_lock_state *lsp = data->lsp;
5807
5808 dprintk("%s: begin!\n", __func__);
5809
5810 if (!nfs4_sequence_done(task, &data->res.seq_res))
5811 return;
5812
5813 data->rpc_status = task->tk_status;
5814 switch (task->tk_status) {
5815 case 0:
5816 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
5817 data->timestamp);
5818 if (data->arg.new_lock) {
5819 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5820 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
5821 rpc_restart_call_prepare(task);
5822 break;
5823 }
5824 }
5825 if (data->arg.new_lock_owner != 0) {
5826 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5827 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5828 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5829 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5830 rpc_restart_call_prepare(task);
5831 break;
5832 case -NFS4ERR_BAD_STATEID:
5833 case -NFS4ERR_OLD_STATEID:
5834 case -NFS4ERR_STALE_STATEID:
5835 case -NFS4ERR_EXPIRED:
5836 if (data->arg.new_lock_owner != 0) {
5837 if (!nfs4_stateid_match(&data->arg.open_stateid,
5838 &lsp->ls_state->open_stateid))
5839 rpc_restart_call_prepare(task);
5840 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5841 &lsp->ls_stateid))
5842 rpc_restart_call_prepare(task);
5843 }
5844 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5845}
5846
5847static void nfs4_lock_release(void *calldata)
5848{
5849 struct nfs4_lockdata *data = calldata;
5850
5851 dprintk("%s: begin!\n", __func__);
5852 nfs_free_seqid(data->arg.open_seqid);
5853 if (data->cancelled != 0) {
5854 struct rpc_task *task;
5855 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5856 data->arg.lock_seqid);
5857 if (!IS_ERR(task))
5858 rpc_put_task_async(task);
5859 dprintk("%s: cancelling lock!\n", __func__);
5860 } else
5861 nfs_free_seqid(data->arg.lock_seqid);
5862 nfs4_put_lock_state(data->lsp);
5863 put_nfs_open_context(data->ctx);
5864 fput(data->fl.fl_file);
5865 kfree(data);
5866 dprintk("%s: done!\n", __func__);
5867}
5868
5869static const struct rpc_call_ops nfs4_lock_ops = {
5870 .rpc_call_prepare = nfs4_lock_prepare,
5871 .rpc_call_done = nfs4_lock_done,
5872 .rpc_release = nfs4_lock_release,
5873};
5874
5875static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5876{
5877 switch (error) {
5878 case -NFS4ERR_ADMIN_REVOKED:
5879 case -NFS4ERR_BAD_STATEID:
5880 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5881 if (new_lock_owner != 0 ||
5882 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5883 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5884 break;
5885 case -NFS4ERR_STALE_STATEID:
5886 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5887 case -NFS4ERR_EXPIRED:
5888 nfs4_schedule_lease_recovery(server->nfs_client);
5889 };
5890}
5891
5892static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5893{
5894 struct nfs4_lockdata *data;
5895 struct rpc_task *task;
5896 struct rpc_message msg = {
5897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5898 .rpc_cred = state->owner->so_cred,
5899 };
5900 struct rpc_task_setup task_setup_data = {
5901 .rpc_client = NFS_CLIENT(state->inode),
5902 .rpc_message = &msg,
5903 .callback_ops = &nfs4_lock_ops,
5904 .workqueue = nfsiod_workqueue,
5905 .flags = RPC_TASK_ASYNC,
5906 };
5907 int ret;
5908
5909 dprintk("%s: begin!\n", __func__);
5910 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5911 fl->fl_u.nfs4_fl.owner,
5912 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5913 if (data == NULL)
5914 return -ENOMEM;
5915 if (IS_SETLKW(cmd))
5916 data->arg.block = 1;
5917 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5918 msg.rpc_argp = &data->arg;
5919 msg.rpc_resp = &data->res;
5920 task_setup_data.callback_data = data;
5921 if (recovery_type > NFS_LOCK_NEW) {
5922 if (recovery_type == NFS_LOCK_RECLAIM)
5923 data->arg.reclaim = NFS_LOCK_RECLAIM;
5924 nfs4_set_sequence_privileged(&data->arg.seq_args);
5925 } else
5926 data->arg.new_lock = 1;
5927 task = rpc_run_task(&task_setup_data);
5928 if (IS_ERR(task))
5929 return PTR_ERR(task);
5930 ret = nfs4_wait_for_completion_rpc_task(task);
5931 if (ret == 0) {
5932 ret = data->rpc_status;
5933 if (ret)
5934 nfs4_handle_setlk_error(data->server, data->lsp,
5935 data->arg.new_lock_owner, ret);
5936 } else
5937 data->cancelled = 1;
5938 rpc_put_task(task);
5939 dprintk("%s: done, ret = %d!\n", __func__, ret);
5940 return ret;
5941}
5942
5943static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5944{
5945 struct nfs_server *server = NFS_SERVER(state->inode);
5946 struct nfs4_exception exception = {
5947 .inode = state->inode,
5948 };
5949 int err;
5950
5951 do {
5952 /* Cache the lock if possible... */
5953 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5954 return 0;
5955 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5956 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5957 if (err != -NFS4ERR_DELAY)
5958 break;
5959 nfs4_handle_exception(server, err, &exception);
5960 } while (exception.retry);
5961 return err;
5962}
5963
5964static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5965{
5966 struct nfs_server *server = NFS_SERVER(state->inode);
5967 struct nfs4_exception exception = {
5968 .inode = state->inode,
5969 };
5970 int err;
5971
5972 err = nfs4_set_lock_state(state, request);
5973 if (err != 0)
5974 return err;
5975 if (!recover_lost_locks) {
5976 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5977 return 0;
5978 }
5979 do {
5980 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5981 return 0;
5982 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5983 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5984 switch (err) {
5985 default:
5986 goto out;
5987 case -NFS4ERR_GRACE:
5988 case -NFS4ERR_DELAY:
5989 nfs4_handle_exception(server, err, &exception);
5990 err = 0;
5991 }
5992 } while (exception.retry);
5993out:
5994 return err;
5995}
5996
5997#if defined(CONFIG_NFS_V4_1)
5998/**
5999 * nfs41_check_expired_locks - possibly free a lock stateid
6000 *
6001 * @state: NFSv4 state for an inode
6002 *
6003 * Returns NFS_OK if recovery for this stateid is now finished.
6004 * Otherwise a negative NFS4ERR value is returned.
6005 */
6006static int nfs41_check_expired_locks(struct nfs4_state *state)
6007{
6008 int status, ret = -NFS4ERR_BAD_STATEID;
6009 struct nfs4_lock_state *lsp;
6010 struct nfs_server *server = NFS_SERVER(state->inode);
6011
6012 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
6013 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
6014 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6015
6016 status = nfs41_test_stateid(server,
6017 &lsp->ls_stateid,
6018 cred);
6019 trace_nfs4_test_lock_stateid(state, lsp, status);
6020 if (status != NFS_OK) {
6021 /* Free the stateid unless the server
6022 * informs us the stateid is unrecognized. */
6023 if (status != -NFS4ERR_BAD_STATEID)
6024 nfs41_free_stateid(server,
6025 &lsp->ls_stateid,
6026 cred);
6027 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6028 ret = status;
6029 }
6030 }
6031 };
6032
6033 return ret;
6034}
6035
6036static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6037{
6038 int status = NFS_OK;
6039
6040 if (test_bit(LK_STATE_IN_USE, &state->flags))
6041 status = nfs41_check_expired_locks(state);
6042 if (status != NFS_OK)
6043 status = nfs4_lock_expired(state, request);
6044 return status;
6045}
6046#endif
6047
6048static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6049{
6050 struct nfs_inode *nfsi = NFS_I(state->inode);
6051 unsigned char fl_flags = request->fl_flags;
6052 int status = -ENOLCK;
6053
6054 if ((fl_flags & FL_POSIX) &&
6055 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6056 goto out;
6057 /* Is this a delegated open? */
6058 status = nfs4_set_lock_state(state, request);
6059 if (status != 0)
6060 goto out;
6061 request->fl_flags |= FL_ACCESS;
6062 status = do_vfs_lock(state->inode, request);
6063 if (status < 0)
6064 goto out;
6065 down_read(&nfsi->rwsem);
6066 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6067 /* Yes: cache locks! */
6068 /* ...but avoid races with delegation recall... */
6069 request->fl_flags = fl_flags & ~FL_SLEEP;
6070 status = do_vfs_lock(state->inode, request);
6071 up_read(&nfsi->rwsem);
6072 goto out;
6073 }
6074 up_read(&nfsi->rwsem);
6075 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6076out:
6077 request->fl_flags = fl_flags;
6078 return status;
6079}
6080
6081static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6082{
6083 struct nfs4_exception exception = {
6084 .state = state,
6085 .inode = state->inode,
6086 };
6087 int err;
6088
6089 do {
6090 err = _nfs4_proc_setlk(state, cmd, request);
6091 trace_nfs4_set_lock(request, state, cmd, err);
6092 if (err == -NFS4ERR_DENIED)
6093 err = -EAGAIN;
6094 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6095 err, &exception);
6096 } while (exception.retry);
6097 return err;
6098}
6099
6100static int
6101nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6102{
6103 struct nfs_open_context *ctx;
6104 struct nfs4_state *state;
6105 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6106 int status;
6107
6108 /* verify open state */
6109 ctx = nfs_file_open_context(filp);
6110 state = ctx->state;
6111
6112 if (request->fl_start < 0 || request->fl_end < 0)
6113 return -EINVAL;
6114
6115 if (IS_GETLK(cmd)) {
6116 if (state != NULL)
6117 return nfs4_proc_getlk(state, F_GETLK, request);
6118 return 0;
6119 }
6120
6121 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6122 return -EINVAL;
6123
6124 if (request->fl_type == F_UNLCK) {
6125 if (state != NULL)
6126 return nfs4_proc_unlck(state, cmd, request);
6127 return 0;
6128 }
6129
6130 if (state == NULL)
6131 return -ENOLCK;
6132 /*
6133 * Don't rely on the VFS having checked the file open mode,
6134 * since it won't do this for flock() locks.
6135 */
6136 switch (request->fl_type) {
6137 case F_RDLCK:
6138 if (!(filp->f_mode & FMODE_READ))
6139 return -EBADF;
6140 break;
6141 case F_WRLCK:
6142 if (!(filp->f_mode & FMODE_WRITE))
6143 return -EBADF;
6144 }
6145
6146 do {
6147 status = nfs4_proc_setlk(state, cmd, request);
6148 if ((status != -EAGAIN) || IS_SETLK(cmd))
6149 break;
6150 timeout = nfs4_set_lock_task_retry(timeout);
6151 status = -ERESTARTSYS;
6152 if (signalled())
6153 break;
6154 } while(status < 0);
6155 return status;
6156}
6157
6158int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6159{
6160 struct nfs_server *server = NFS_SERVER(state->inode);
6161 int err;
6162
6163 err = nfs4_set_lock_state(state, fl);
6164 if (err != 0)
6165 return err;
6166 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6167 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6168}
6169
6170struct nfs_release_lockowner_data {
6171 struct nfs4_lock_state *lsp;
6172 struct nfs_server *server;
6173 struct nfs_release_lockowner_args args;
6174 struct nfs_release_lockowner_res res;
6175 unsigned long timestamp;
6176};
6177
6178static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6179{
6180 struct nfs_release_lockowner_data *data = calldata;
6181 struct nfs_server *server = data->server;
6182 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6183 &data->args.seq_args, &data->res.seq_res, task);
6184 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6185 data->timestamp = jiffies;
6186}
6187
6188static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6189{
6190 struct nfs_release_lockowner_data *data = calldata;
6191 struct nfs_server *server = data->server;
6192
6193 nfs40_sequence_done(task, &data->res.seq_res);
6194
6195 switch (task->tk_status) {
6196 case 0:
6197 renew_lease(server, data->timestamp);
6198 break;
6199 case -NFS4ERR_STALE_CLIENTID:
6200 case -NFS4ERR_EXPIRED:
6201 nfs4_schedule_lease_recovery(server->nfs_client);
6202 break;
6203 case -NFS4ERR_LEASE_MOVED:
6204 case -NFS4ERR_DELAY:
6205 if (nfs4_async_handle_error(task, server,
6206 NULL, NULL) == -EAGAIN)
6207 rpc_restart_call_prepare(task);
6208 }
6209}
6210
6211static void nfs4_release_lockowner_release(void *calldata)
6212{
6213 struct nfs_release_lockowner_data *data = calldata;
6214 nfs4_free_lock_state(data->server, data->lsp);
6215 kfree(calldata);
6216}
6217
6218static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6219 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6220 .rpc_call_done = nfs4_release_lockowner_done,
6221 .rpc_release = nfs4_release_lockowner_release,
6222};
6223
6224static void
6225nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6226{
6227 struct nfs_release_lockowner_data *data;
6228 struct rpc_message msg = {
6229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6230 };
6231
6232 if (server->nfs_client->cl_mvops->minor_version != 0)
6233 return;
6234
6235 data = kmalloc(sizeof(*data), GFP_NOFS);
6236 if (!data)
6237 return;
6238 data->lsp = lsp;
6239 data->server = server;
6240 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6241 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6242 data->args.lock_owner.s_dev = server->s_dev;
6243
6244 msg.rpc_argp = &data->args;
6245 msg.rpc_resp = &data->res;
6246 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6247 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6248}
6249
6250#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6251
6252static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6253 const void *buf, size_t buflen,
6254 int flags, int type)
6255{
6256 if (strcmp(key, "") != 0)
6257 return -EINVAL;
6258
6259 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6260}
6261
6262static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6263 void *buf, size_t buflen, int type)
6264{
6265 if (strcmp(key, "") != 0)
6266 return -EINVAL;
6267
6268 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6269}
6270
6271static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6272 size_t list_len, const char *name,
6273 size_t name_len, int type)
6274{
6275 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6276
6277 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
6278 return 0;
6279
6280 if (list && len <= list_len)
6281 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6282 return len;
6283}
6284
6285#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6286static inline int nfs4_server_supports_labels(struct nfs_server *server)
6287{
6288 return server->caps & NFS_CAP_SECURITY_LABEL;
6289}
6290
6291static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6292 const void *buf, size_t buflen,
6293 int flags, int type)
6294{
6295 if (security_ismaclabel(key))
6296 return nfs4_set_security_label(dentry, buf, buflen);
6297
6298 return -EOPNOTSUPP;
6299}
6300
6301static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6302 void *buf, size_t buflen, int type)
6303{
6304 if (security_ismaclabel(key))
6305 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
6306 return -EOPNOTSUPP;
6307}
6308
6309static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6310 size_t list_len, const char *name,
6311 size_t name_len, int type)
6312{
6313 size_t len = 0;
6314
6315 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6316 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
6317 if (list && len <= list_len)
6318 security_inode_listsecurity(d_inode(dentry), list, len);
6319 }
6320 return len;
6321}
6322
6323static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6324 .prefix = XATTR_SECURITY_PREFIX,
6325 .list = nfs4_xattr_list_nfs4_label,
6326 .get = nfs4_xattr_get_nfs4_label,
6327 .set = nfs4_xattr_set_nfs4_label,
6328};
6329#endif
6330
6331
6332/*
6333 * nfs_fhget will use either the mounted_on_fileid or the fileid
6334 */
6335static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6336{
6337 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6338 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6339 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6340 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6341 return;
6342
6343 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6344 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6345 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6346 fattr->nlink = 2;
6347}
6348
6349static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6350 const struct qstr *name,
6351 struct nfs4_fs_locations *fs_locations,
6352 struct page *page)
6353{
6354 struct nfs_server *server = NFS_SERVER(dir);
6355 u32 bitmask[3] = {
6356 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6357 };
6358 struct nfs4_fs_locations_arg args = {
6359 .dir_fh = NFS_FH(dir),
6360 .name = name,
6361 .page = page,
6362 .bitmask = bitmask,
6363 };
6364 struct nfs4_fs_locations_res res = {
6365 .fs_locations = fs_locations,
6366 };
6367 struct rpc_message msg = {
6368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6369 .rpc_argp = &args,
6370 .rpc_resp = &res,
6371 };
6372 int status;
6373
6374 dprintk("%s: start\n", __func__);
6375
6376 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6377 * is not supported */
6378 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6379 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6380 else
6381 bitmask[0] |= FATTR4_WORD0_FILEID;
6382
6383 nfs_fattr_init(&fs_locations->fattr);
6384 fs_locations->server = server;
6385 fs_locations->nlocations = 0;
6386 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6387 dprintk("%s: returned status = %d\n", __func__, status);
6388 return status;
6389}
6390
6391int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6392 const struct qstr *name,
6393 struct nfs4_fs_locations *fs_locations,
6394 struct page *page)
6395{
6396 struct nfs4_exception exception = { };
6397 int err;
6398 do {
6399 err = _nfs4_proc_fs_locations(client, dir, name,
6400 fs_locations, page);
6401 trace_nfs4_get_fs_locations(dir, name, err);
6402 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6403 &exception);
6404 } while (exception.retry);
6405 return err;
6406}
6407
6408/*
6409 * This operation also signals the server that this client is
6410 * performing migration recovery. The server can stop returning
6411 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6412 * appended to this compound to identify the client ID which is
6413 * performing recovery.
6414 */
6415static int _nfs40_proc_get_locations(struct inode *inode,
6416 struct nfs4_fs_locations *locations,
6417 struct page *page, struct rpc_cred *cred)
6418{
6419 struct nfs_server *server = NFS_SERVER(inode);
6420 struct rpc_clnt *clnt = server->client;
6421 u32 bitmask[2] = {
6422 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6423 };
6424 struct nfs4_fs_locations_arg args = {
6425 .clientid = server->nfs_client->cl_clientid,
6426 .fh = NFS_FH(inode),
6427 .page = page,
6428 .bitmask = bitmask,
6429 .migration = 1, /* skip LOOKUP */
6430 .renew = 1, /* append RENEW */
6431 };
6432 struct nfs4_fs_locations_res res = {
6433 .fs_locations = locations,
6434 .migration = 1,
6435 .renew = 1,
6436 };
6437 struct rpc_message msg = {
6438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6439 .rpc_argp = &args,
6440 .rpc_resp = &res,
6441 .rpc_cred = cred,
6442 };
6443 unsigned long now = jiffies;
6444 int status;
6445
6446 nfs_fattr_init(&locations->fattr);
6447 locations->server = server;
6448 locations->nlocations = 0;
6449
6450 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6451 nfs4_set_sequence_privileged(&args.seq_args);
6452 status = nfs4_call_sync_sequence(clnt, server, &msg,
6453 &args.seq_args, &res.seq_res);
6454 if (status)
6455 return status;
6456
6457 renew_lease(server, now);
6458 return 0;
6459}
6460
6461#ifdef CONFIG_NFS_V4_1
6462
6463/*
6464 * This operation also signals the server that this client is
6465 * performing migration recovery. The server can stop asserting
6466 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6467 * performing this operation is identified in the SEQUENCE
6468 * operation in this compound.
6469 *
6470 * When the client supports GETATTR(fs_locations_info), it can
6471 * be plumbed in here.
6472 */
6473static int _nfs41_proc_get_locations(struct inode *inode,
6474 struct nfs4_fs_locations *locations,
6475 struct page *page, struct rpc_cred *cred)
6476{
6477 struct nfs_server *server = NFS_SERVER(inode);
6478 struct rpc_clnt *clnt = server->client;
6479 u32 bitmask[2] = {
6480 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6481 };
6482 struct nfs4_fs_locations_arg args = {
6483 .fh = NFS_FH(inode),
6484 .page = page,
6485 .bitmask = bitmask,
6486 .migration = 1, /* skip LOOKUP */
6487 };
6488 struct nfs4_fs_locations_res res = {
6489 .fs_locations = locations,
6490 .migration = 1,
6491 };
6492 struct rpc_message msg = {
6493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6494 .rpc_argp = &args,
6495 .rpc_resp = &res,
6496 .rpc_cred = cred,
6497 };
6498 int status;
6499
6500 nfs_fattr_init(&locations->fattr);
6501 locations->server = server;
6502 locations->nlocations = 0;
6503
6504 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6505 nfs4_set_sequence_privileged(&args.seq_args);
6506 status = nfs4_call_sync_sequence(clnt, server, &msg,
6507 &args.seq_args, &res.seq_res);
6508 if (status == NFS4_OK &&
6509 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6510 status = -NFS4ERR_LEASE_MOVED;
6511 return status;
6512}
6513
6514#endif /* CONFIG_NFS_V4_1 */
6515
6516/**
6517 * nfs4_proc_get_locations - discover locations for a migrated FSID
6518 * @inode: inode on FSID that is migrating
6519 * @locations: result of query
6520 * @page: buffer
6521 * @cred: credential to use for this operation
6522 *
6523 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6524 * operation failed, or a negative errno if a local error occurred.
6525 *
6526 * On success, "locations" is filled in, but if the server has
6527 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6528 * asserted.
6529 *
6530 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6531 * from this client that require migration recovery.
6532 */
6533int nfs4_proc_get_locations(struct inode *inode,
6534 struct nfs4_fs_locations *locations,
6535 struct page *page, struct rpc_cred *cred)
6536{
6537 struct nfs_server *server = NFS_SERVER(inode);
6538 struct nfs_client *clp = server->nfs_client;
6539 const struct nfs4_mig_recovery_ops *ops =
6540 clp->cl_mvops->mig_recovery_ops;
6541 struct nfs4_exception exception = { };
6542 int status;
6543
6544 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6545 (unsigned long long)server->fsid.major,
6546 (unsigned long long)server->fsid.minor,
6547 clp->cl_hostname);
6548 nfs_display_fhandle(NFS_FH(inode), __func__);
6549
6550 do {
6551 status = ops->get_locations(inode, locations, page, cred);
6552 if (status != -NFS4ERR_DELAY)
6553 break;
6554 nfs4_handle_exception(server, status, &exception);
6555 } while (exception.retry);
6556 return status;
6557}
6558
6559/*
6560 * This operation also signals the server that this client is
6561 * performing "lease moved" recovery. The server can stop
6562 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6563 * is appended to this compound to identify the client ID which is
6564 * performing recovery.
6565 */
6566static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6567{
6568 struct nfs_server *server = NFS_SERVER(inode);
6569 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6570 struct rpc_clnt *clnt = server->client;
6571 struct nfs4_fsid_present_arg args = {
6572 .fh = NFS_FH(inode),
6573 .clientid = clp->cl_clientid,
6574 .renew = 1, /* append RENEW */
6575 };
6576 struct nfs4_fsid_present_res res = {
6577 .renew = 1,
6578 };
6579 struct rpc_message msg = {
6580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6581 .rpc_argp = &args,
6582 .rpc_resp = &res,
6583 .rpc_cred = cred,
6584 };
6585 unsigned long now = jiffies;
6586 int status;
6587
6588 res.fh = nfs_alloc_fhandle();
6589 if (res.fh == NULL)
6590 return -ENOMEM;
6591
6592 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6593 nfs4_set_sequence_privileged(&args.seq_args);
6594 status = nfs4_call_sync_sequence(clnt, server, &msg,
6595 &args.seq_args, &res.seq_res);
6596 nfs_free_fhandle(res.fh);
6597 if (status)
6598 return status;
6599
6600 do_renew_lease(clp, now);
6601 return 0;
6602}
6603
6604#ifdef CONFIG_NFS_V4_1
6605
6606/*
6607 * This operation also signals the server that this client is
6608 * performing "lease moved" recovery. The server can stop asserting
6609 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6610 * this operation is identified in the SEQUENCE operation in this
6611 * compound.
6612 */
6613static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6614{
6615 struct nfs_server *server = NFS_SERVER(inode);
6616 struct rpc_clnt *clnt = server->client;
6617 struct nfs4_fsid_present_arg args = {
6618 .fh = NFS_FH(inode),
6619 };
6620 struct nfs4_fsid_present_res res = {
6621 };
6622 struct rpc_message msg = {
6623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6624 .rpc_argp = &args,
6625 .rpc_resp = &res,
6626 .rpc_cred = cred,
6627 };
6628 int status;
6629
6630 res.fh = nfs_alloc_fhandle();
6631 if (res.fh == NULL)
6632 return -ENOMEM;
6633
6634 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6635 nfs4_set_sequence_privileged(&args.seq_args);
6636 status = nfs4_call_sync_sequence(clnt, server, &msg,
6637 &args.seq_args, &res.seq_res);
6638 nfs_free_fhandle(res.fh);
6639 if (status == NFS4_OK &&
6640 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6641 status = -NFS4ERR_LEASE_MOVED;
6642 return status;
6643}
6644
6645#endif /* CONFIG_NFS_V4_1 */
6646
6647/**
6648 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6649 * @inode: inode on FSID to check
6650 * @cred: credential to use for this operation
6651 *
6652 * Server indicates whether the FSID is present, moved, or not
6653 * recognized. This operation is necessary to clear a LEASE_MOVED
6654 * condition for this client ID.
6655 *
6656 * Returns NFS4_OK if the FSID is present on this server,
6657 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6658 * NFS4ERR code if some error occurred on the server, or a
6659 * negative errno if a local failure occurred.
6660 */
6661int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6662{
6663 struct nfs_server *server = NFS_SERVER(inode);
6664 struct nfs_client *clp = server->nfs_client;
6665 const struct nfs4_mig_recovery_ops *ops =
6666 clp->cl_mvops->mig_recovery_ops;
6667 struct nfs4_exception exception = { };
6668 int status;
6669
6670 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6671 (unsigned long long)server->fsid.major,
6672 (unsigned long long)server->fsid.minor,
6673 clp->cl_hostname);
6674 nfs_display_fhandle(NFS_FH(inode), __func__);
6675
6676 do {
6677 status = ops->fsid_present(inode, cred);
6678 if (status != -NFS4ERR_DELAY)
6679 break;
6680 nfs4_handle_exception(server, status, &exception);
6681 } while (exception.retry);
6682 return status;
6683}
6684
6685/**
6686 * If 'use_integrity' is true and the state managment nfs_client
6687 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6688 * and the machine credential as per RFC3530bis and RFC5661 Security
6689 * Considerations sections. Otherwise, just use the user cred with the
6690 * filesystem's rpc_client.
6691 */
6692static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6693{
6694 int status;
6695 struct nfs4_secinfo_arg args = {
6696 .dir_fh = NFS_FH(dir),
6697 .name = name,
6698 };
6699 struct nfs4_secinfo_res res = {
6700 .flavors = flavors,
6701 };
6702 struct rpc_message msg = {
6703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6704 .rpc_argp = &args,
6705 .rpc_resp = &res,
6706 };
6707 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6708 struct rpc_cred *cred = NULL;
6709
6710 if (use_integrity) {
6711 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6712 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6713 msg.rpc_cred = cred;
6714 }
6715
6716 dprintk("NFS call secinfo %s\n", name->name);
6717
6718 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6719 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6720
6721 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6722 &res.seq_res, 0);
6723 dprintk("NFS reply secinfo: %d\n", status);
6724
6725 if (cred)
6726 put_rpccred(cred);
6727
6728 return status;
6729}
6730
6731int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6732 struct nfs4_secinfo_flavors *flavors)
6733{
6734 struct nfs4_exception exception = { };
6735 int err;
6736 do {
6737 err = -NFS4ERR_WRONGSEC;
6738
6739 /* try to use integrity protection with machine cred */
6740 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6741 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6742
6743 /*
6744 * if unable to use integrity protection, or SECINFO with
6745 * integrity protection returns NFS4ERR_WRONGSEC (which is
6746 * disallowed by spec, but exists in deployed servers) use
6747 * the current filesystem's rpc_client and the user cred.
6748 */
6749 if (err == -NFS4ERR_WRONGSEC)
6750 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6751
6752 trace_nfs4_secinfo(dir, name, err);
6753 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6754 &exception);
6755 } while (exception.retry);
6756 return err;
6757}
6758
6759#ifdef CONFIG_NFS_V4_1
6760/*
6761 * Check the exchange flags returned by the server for invalid flags, having
6762 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6763 * DS flags set.
6764 */
6765static int nfs4_check_cl_exchange_flags(u32 flags)
6766{
6767 if (flags & ~EXCHGID4_FLAG_MASK_R)
6768 goto out_inval;
6769 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6770 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6771 goto out_inval;
6772 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6773 goto out_inval;
6774 return NFS_OK;
6775out_inval:
6776 return -NFS4ERR_INVAL;
6777}
6778
6779static bool
6780nfs41_same_server_scope(struct nfs41_server_scope *a,
6781 struct nfs41_server_scope *b)
6782{
6783 if (a->server_scope_sz == b->server_scope_sz &&
6784 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6785 return true;
6786
6787 return false;
6788}
6789
6790/*
6791 * nfs4_proc_bind_conn_to_session()
6792 *
6793 * The 4.1 client currently uses the same TCP connection for the
6794 * fore and backchannel.
6795 */
6796int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6797{
6798 int status;
6799 struct nfs41_bind_conn_to_session_args args = {
6800 .client = clp,
6801 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6802 };
6803 struct nfs41_bind_conn_to_session_res res;
6804 struct rpc_message msg = {
6805 .rpc_proc =
6806 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6807 .rpc_argp = &args,
6808 .rpc_resp = &res,
6809 .rpc_cred = cred,
6810 };
6811
6812 dprintk("--> %s\n", __func__);
6813
6814 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6815 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6816 args.dir = NFS4_CDFC4_FORE;
6817
6818 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6819 trace_nfs4_bind_conn_to_session(clp, status);
6820 if (status == 0) {
6821 if (memcmp(res.sessionid.data,
6822 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6823 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6824 status = -EIO;
6825 goto out;
6826 }
6827 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6828 dprintk("NFS: %s: Unexpected direction from server\n",
6829 __func__);
6830 status = -EIO;
6831 goto out;
6832 }
6833 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6834 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6835 __func__);
6836 status = -EIO;
6837 goto out;
6838 }
6839 }
6840out:
6841 dprintk("<-- %s status= %d\n", __func__, status);
6842 return status;
6843}
6844
6845/*
6846 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6847 * and operations we'd like to see to enable certain features in the allow map
6848 */
6849static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6850 .how = SP4_MACH_CRED,
6851 .enforce.u.words = {
6852 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6853 1 << (OP_EXCHANGE_ID - 32) |
6854 1 << (OP_CREATE_SESSION - 32) |
6855 1 << (OP_DESTROY_SESSION - 32) |
6856 1 << (OP_DESTROY_CLIENTID - 32)
6857 },
6858 .allow.u.words = {
6859 [0] = 1 << (OP_CLOSE) |
6860 1 << (OP_LOCKU) |
6861 1 << (OP_COMMIT),
6862 [1] = 1 << (OP_SECINFO - 32) |
6863 1 << (OP_SECINFO_NO_NAME - 32) |
6864 1 << (OP_TEST_STATEID - 32) |
6865 1 << (OP_FREE_STATEID - 32) |
6866 1 << (OP_WRITE - 32)
6867 }
6868};
6869
6870/*
6871 * Select the state protection mode for client `clp' given the server results
6872 * from exchange_id in `sp'.
6873 *
6874 * Returns 0 on success, negative errno otherwise.
6875 */
6876static int nfs4_sp4_select_mode(struct nfs_client *clp,
6877 struct nfs41_state_protection *sp)
6878{
6879 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6880 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6881 1 << (OP_EXCHANGE_ID - 32) |
6882 1 << (OP_CREATE_SESSION - 32) |
6883 1 << (OP_DESTROY_SESSION - 32) |
6884 1 << (OP_DESTROY_CLIENTID - 32)
6885 };
6886 unsigned int i;
6887
6888 if (sp->how == SP4_MACH_CRED) {
6889 /* Print state protect result */
6890 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6891 for (i = 0; i <= LAST_NFS4_OP; i++) {
6892 if (test_bit(i, sp->enforce.u.longs))
6893 dfprintk(MOUNT, " enforce op %d\n", i);
6894 if (test_bit(i, sp->allow.u.longs))
6895 dfprintk(MOUNT, " allow op %d\n", i);
6896 }
6897
6898 /* make sure nothing is on enforce list that isn't supported */
6899 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6900 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6901 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6902 return -EINVAL;
6903 }
6904 }
6905
6906 /*
6907 * Minimal mode - state operations are allowed to use machine
6908 * credential. Note this already happens by default, so the
6909 * client doesn't have to do anything more than the negotiation.
6910 *
6911 * NOTE: we don't care if EXCHANGE_ID is in the list -
6912 * we're already using the machine cred for exchange_id
6913 * and will never use a different cred.
6914 */
6915 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6916 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6917 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6918 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6919 dfprintk(MOUNT, "sp4_mach_cred:\n");
6920 dfprintk(MOUNT, " minimal mode enabled\n");
6921 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6922 } else {
6923 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6924 return -EINVAL;
6925 }
6926
6927 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6928 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6929 dfprintk(MOUNT, " cleanup mode enabled\n");
6930 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6931 }
6932
6933 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6934 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6935 dfprintk(MOUNT, " secinfo mode enabled\n");
6936 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6937 }
6938
6939 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6940 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6941 dfprintk(MOUNT, " stateid mode enabled\n");
6942 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6943 }
6944
6945 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6946 dfprintk(MOUNT, " write mode enabled\n");
6947 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6948 }
6949
6950 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6951 dfprintk(MOUNT, " commit mode enabled\n");
6952 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6953 }
6954 }
6955
6956 return 0;
6957}
6958
6959/*
6960 * _nfs4_proc_exchange_id()
6961 *
6962 * Wrapper for EXCHANGE_ID operation.
6963 */
6964static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6965 u32 sp4_how)
6966{
6967 nfs4_verifier verifier;
6968 struct nfs41_exchange_id_args args = {
6969 .verifier = &verifier,
6970 .client = clp,
6971#ifdef CONFIG_NFS_V4_1_MIGRATION
6972 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6973 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6974 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6975#else
6976 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6977 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6978#endif
6979 };
6980 struct nfs41_exchange_id_res res = {
6981 0
6982 };
6983 int status;
6984 struct rpc_message msg = {
6985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6986 .rpc_argp = &args,
6987 .rpc_resp = &res,
6988 .rpc_cred = cred,
6989 };
6990
6991 nfs4_init_boot_verifier(clp, &verifier);
6992
6993 status = nfs4_init_uniform_client_string(clp);
6994 if (status)
6995 goto out;
6996
6997 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6998 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6999 clp->cl_owner_id);
7000
7001 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7002 GFP_NOFS);
7003 if (unlikely(res.server_owner == NULL)) {
7004 status = -ENOMEM;
7005 goto out;
7006 }
7007
7008 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7009 GFP_NOFS);
7010 if (unlikely(res.server_scope == NULL)) {
7011 status = -ENOMEM;
7012 goto out_server_owner;
7013 }
7014
7015 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7016 if (unlikely(res.impl_id == NULL)) {
7017 status = -ENOMEM;
7018 goto out_server_scope;
7019 }
7020
7021 switch (sp4_how) {
7022 case SP4_NONE:
7023 args.state_protect.how = SP4_NONE;
7024 break;
7025
7026 case SP4_MACH_CRED:
7027 args.state_protect = nfs4_sp4_mach_cred_request;
7028 break;
7029
7030 default:
7031 /* unsupported! */
7032 WARN_ON_ONCE(1);
7033 status = -EINVAL;
7034 goto out_impl_id;
7035 }
7036
7037 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7038 trace_nfs4_exchange_id(clp, status);
7039 if (status == 0)
7040 status = nfs4_check_cl_exchange_flags(res.flags);
7041
7042 if (status == 0)
7043 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7044
7045 if (status == 0) {
7046 clp->cl_clientid = res.clientid;
7047 clp->cl_exchange_flags = res.flags;
7048 /* Client ID is not confirmed */
7049 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7050 clear_bit(NFS4_SESSION_ESTABLISHED,
7051 &clp->cl_session->session_state);
7052 clp->cl_seqid = res.seqid;
7053 }
7054
7055 kfree(clp->cl_serverowner);
7056 clp->cl_serverowner = res.server_owner;
7057 res.server_owner = NULL;
7058
7059 /* use the most recent implementation id */
7060 kfree(clp->cl_implid);
7061 clp->cl_implid = res.impl_id;
7062 res.impl_id = NULL;
7063
7064 if (clp->cl_serverscope != NULL &&
7065 !nfs41_same_server_scope(clp->cl_serverscope,
7066 res.server_scope)) {
7067 dprintk("%s: server_scope mismatch detected\n",
7068 __func__);
7069 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7070 kfree(clp->cl_serverscope);
7071 clp->cl_serverscope = NULL;
7072 }
7073
7074 if (clp->cl_serverscope == NULL) {
7075 clp->cl_serverscope = res.server_scope;
7076 res.server_scope = NULL;
7077 }
7078 }
7079
7080out_impl_id:
7081 kfree(res.impl_id);
7082out_server_scope:
7083 kfree(res.server_scope);
7084out_server_owner:
7085 kfree(res.server_owner);
7086out:
7087 if (clp->cl_implid != NULL)
7088 dprintk("NFS reply exchange_id: Server Implementation ID: "
7089 "domain: %s, name: %s, date: %llu,%u\n",
7090 clp->cl_implid->domain, clp->cl_implid->name,
7091 clp->cl_implid->date.seconds,
7092 clp->cl_implid->date.nseconds);
7093 dprintk("NFS reply exchange_id: %d\n", status);
7094 return status;
7095}
7096
7097/*
7098 * nfs4_proc_exchange_id()
7099 *
7100 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7101 *
7102 * Since the clientid has expired, all compounds using sessions
7103 * associated with the stale clientid will be returning
7104 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7105 * be in some phase of session reset.
7106 *
7107 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7108 */
7109int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7110{
7111 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7112 int status;
7113
7114 /* try SP4_MACH_CRED if krb5i/p */
7115 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7116 authflavor == RPC_AUTH_GSS_KRB5P) {
7117 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7118 if (!status)
7119 return 0;
7120 }
7121
7122 /* try SP4_NONE */
7123 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7124}
7125
7126static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7127 struct rpc_cred *cred)
7128{
7129 struct rpc_message msg = {
7130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7131 .rpc_argp = clp,
7132 .rpc_cred = cred,
7133 };
7134 int status;
7135
7136 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7137 trace_nfs4_destroy_clientid(clp, status);
7138 if (status)
7139 dprintk("NFS: Got error %d from the server %s on "
7140 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7141 return status;
7142}
7143
7144static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7145 struct rpc_cred *cred)
7146{
7147 unsigned int loop;
7148 int ret;
7149
7150 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7151 ret = _nfs4_proc_destroy_clientid(clp, cred);
7152 switch (ret) {
7153 case -NFS4ERR_DELAY:
7154 case -NFS4ERR_CLIENTID_BUSY:
7155 ssleep(1);
7156 break;
7157 default:
7158 return ret;
7159 }
7160 }
7161 return 0;
7162}
7163
7164int nfs4_destroy_clientid(struct nfs_client *clp)
7165{
7166 struct rpc_cred *cred;
7167 int ret = 0;
7168
7169 if (clp->cl_mvops->minor_version < 1)
7170 goto out;
7171 if (clp->cl_exchange_flags == 0)
7172 goto out;
7173 if (clp->cl_preserve_clid)
7174 goto out;
7175 cred = nfs4_get_clid_cred(clp);
7176 ret = nfs4_proc_destroy_clientid(clp, cred);
7177 if (cred)
7178 put_rpccred(cred);
7179 switch (ret) {
7180 case 0:
7181 case -NFS4ERR_STALE_CLIENTID:
7182 clp->cl_exchange_flags = 0;
7183 }
7184out:
7185 return ret;
7186}
7187
7188struct nfs4_get_lease_time_data {
7189 struct nfs4_get_lease_time_args *args;
7190 struct nfs4_get_lease_time_res *res;
7191 struct nfs_client *clp;
7192};
7193
7194static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7195 void *calldata)
7196{
7197 struct nfs4_get_lease_time_data *data =
7198 (struct nfs4_get_lease_time_data *)calldata;
7199
7200 dprintk("--> %s\n", __func__);
7201 /* just setup sequence, do not trigger session recovery
7202 since we're invoked within one */
7203 nfs41_setup_sequence(data->clp->cl_session,
7204 &data->args->la_seq_args,
7205 &data->res->lr_seq_res,
7206 task);
7207 dprintk("<-- %s\n", __func__);
7208}
7209
7210/*
7211 * Called from nfs4_state_manager thread for session setup, so don't recover
7212 * from sequence operation or clientid errors.
7213 */
7214static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7215{
7216 struct nfs4_get_lease_time_data *data =
7217 (struct nfs4_get_lease_time_data *)calldata;
7218
7219 dprintk("--> %s\n", __func__);
7220 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7221 return;
7222 switch (task->tk_status) {
7223 case -NFS4ERR_DELAY:
7224 case -NFS4ERR_GRACE:
7225 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7226 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7227 task->tk_status = 0;
7228 /* fall through */
7229 case -NFS4ERR_RETRY_UNCACHED_REP:
7230 rpc_restart_call_prepare(task);
7231 return;
7232 }
7233 dprintk("<-- %s\n", __func__);
7234}
7235
7236static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7237 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7238 .rpc_call_done = nfs4_get_lease_time_done,
7239};
7240
7241int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7242{
7243 struct rpc_task *task;
7244 struct nfs4_get_lease_time_args args;
7245 struct nfs4_get_lease_time_res res = {
7246 .lr_fsinfo = fsinfo,
7247 };
7248 struct nfs4_get_lease_time_data data = {
7249 .args = &args,
7250 .res = &res,
7251 .clp = clp,
7252 };
7253 struct rpc_message msg = {
7254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7255 .rpc_argp = &args,
7256 .rpc_resp = &res,
7257 };
7258 struct rpc_task_setup task_setup = {
7259 .rpc_client = clp->cl_rpcclient,
7260 .rpc_message = &msg,
7261 .callback_ops = &nfs4_get_lease_time_ops,
7262 .callback_data = &data,
7263 .flags = RPC_TASK_TIMEOUT,
7264 };
7265 int status;
7266
7267 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7268 nfs4_set_sequence_privileged(&args.la_seq_args);
7269 dprintk("--> %s\n", __func__);
7270 task = rpc_run_task(&task_setup);
7271
7272 if (IS_ERR(task))
7273 status = PTR_ERR(task);
7274 else {
7275 status = task->tk_status;
7276 rpc_put_task(task);
7277 }
7278 dprintk("<-- %s return %d\n", __func__, status);
7279
7280 return status;
7281}
7282
7283/*
7284 * Initialize the values to be used by the client in CREATE_SESSION
7285 * If nfs4_init_session set the fore channel request and response sizes,
7286 * use them.
7287 *
7288 * Set the back channel max_resp_sz_cached to zero to force the client to
7289 * always set csa_cachethis to FALSE because the current implementation
7290 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7291 */
7292static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7293{
7294 unsigned int max_rqst_sz, max_resp_sz;
7295
7296 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7297 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7298
7299 /* Fore channel attributes */
7300 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7301 args->fc_attrs.max_resp_sz = max_resp_sz;
7302 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7303 args->fc_attrs.max_reqs = max_session_slots;
7304
7305 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7306 "max_ops=%u max_reqs=%u\n",
7307 __func__,
7308 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7309 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7310
7311 /* Back channel attributes */
7312 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7313 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7314 args->bc_attrs.max_resp_sz_cached = 0;
7315 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7316 args->bc_attrs.max_reqs = 1;
7317
7318 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7319 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7320 __func__,
7321 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7322 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7323 args->bc_attrs.max_reqs);
7324}
7325
7326static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7327 struct nfs41_create_session_res *res)
7328{
7329 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7330 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7331
7332 if (rcvd->max_resp_sz > sent->max_resp_sz)
7333 return -EINVAL;
7334 /*
7335 * Our requested max_ops is the minimum we need; we're not
7336 * prepared to break up compounds into smaller pieces than that.
7337 * So, no point even trying to continue if the server won't
7338 * cooperate:
7339 */
7340 if (rcvd->max_ops < sent->max_ops)
7341 return -EINVAL;
7342 if (rcvd->max_reqs == 0)
7343 return -EINVAL;
7344 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7345 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7346 return 0;
7347}
7348
7349static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7350 struct nfs41_create_session_res *res)
7351{
7352 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7353 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7354
7355 if (!(res->flags & SESSION4_BACK_CHAN))
7356 goto out;
7357 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7358 return -EINVAL;
7359 if (rcvd->max_resp_sz < sent->max_resp_sz)
7360 return -EINVAL;
7361 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7362 return -EINVAL;
7363 /* These would render the backchannel useless: */
7364 if (rcvd->max_ops != sent->max_ops)
7365 return -EINVAL;
7366 if (rcvd->max_reqs != sent->max_reqs)
7367 return -EINVAL;
7368out:
7369 return 0;
7370}
7371
7372static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7373 struct nfs41_create_session_res *res)
7374{
7375 int ret;
7376
7377 ret = nfs4_verify_fore_channel_attrs(args, res);
7378 if (ret)
7379 return ret;
7380 return nfs4_verify_back_channel_attrs(args, res);
7381}
7382
7383static void nfs4_update_session(struct nfs4_session *session,
7384 struct nfs41_create_session_res *res)
7385{
7386 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7387 /* Mark client id and session as being confirmed */
7388 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7389 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7390 session->flags = res->flags;
7391 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7392 if (res->flags & SESSION4_BACK_CHAN)
7393 memcpy(&session->bc_attrs, &res->bc_attrs,
7394 sizeof(session->bc_attrs));
7395}
7396
7397static int _nfs4_proc_create_session(struct nfs_client *clp,
7398 struct rpc_cred *cred)
7399{
7400 struct nfs4_session *session = clp->cl_session;
7401 struct nfs41_create_session_args args = {
7402 .client = clp,
7403 .clientid = clp->cl_clientid,
7404 .seqid = clp->cl_seqid,
7405 .cb_program = NFS4_CALLBACK,
7406 };
7407 struct nfs41_create_session_res res;
7408
7409 struct rpc_message msg = {
7410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7411 .rpc_argp = &args,
7412 .rpc_resp = &res,
7413 .rpc_cred = cred,
7414 };
7415 int status;
7416
7417 nfs4_init_channel_attrs(&args);
7418 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7419
7420 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7421 trace_nfs4_create_session(clp, status);
7422
7423 if (!status) {
7424 /* Verify the session's negotiated channel_attrs values */
7425 status = nfs4_verify_channel_attrs(&args, &res);
7426 /* Increment the clientid slot sequence id */
7427 if (clp->cl_seqid == res.seqid)
7428 clp->cl_seqid++;
7429 if (status)
7430 goto out;
7431 nfs4_update_session(session, &res);
7432 }
7433out:
7434 return status;
7435}
7436
7437/*
7438 * Issues a CREATE_SESSION operation to the server.
7439 * It is the responsibility of the caller to verify the session is
7440 * expired before calling this routine.
7441 */
7442int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7443{
7444 int status;
7445 unsigned *ptr;
7446 struct nfs4_session *session = clp->cl_session;
7447
7448 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7449
7450 status = _nfs4_proc_create_session(clp, cred);
7451 if (status)
7452 goto out;
7453
7454 /* Init or reset the session slot tables */
7455 status = nfs4_setup_session_slot_tables(session);
7456 dprintk("slot table setup returned %d\n", status);
7457 if (status)
7458 goto out;
7459
7460 ptr = (unsigned *)&session->sess_id.data[0];
7461 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7462 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7463out:
7464 dprintk("<-- %s\n", __func__);
7465 return status;
7466}
7467
7468/*
7469 * Issue the over-the-wire RPC DESTROY_SESSION.
7470 * The caller must serialize access to this routine.
7471 */
7472int nfs4_proc_destroy_session(struct nfs4_session *session,
7473 struct rpc_cred *cred)
7474{
7475 struct rpc_message msg = {
7476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7477 .rpc_argp = session,
7478 .rpc_cred = cred,
7479 };
7480 int status = 0;
7481
7482 dprintk("--> nfs4_proc_destroy_session\n");
7483
7484 /* session is still being setup */
7485 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7486 return 0;
7487
7488 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7489 trace_nfs4_destroy_session(session->clp, status);
7490
7491 if (status)
7492 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7493 "Session has been destroyed regardless...\n", status);
7494
7495 dprintk("<-- nfs4_proc_destroy_session\n");
7496 return status;
7497}
7498
7499/*
7500 * Renew the cl_session lease.
7501 */
7502struct nfs4_sequence_data {
7503 struct nfs_client *clp;
7504 struct nfs4_sequence_args args;
7505 struct nfs4_sequence_res res;
7506};
7507
7508static void nfs41_sequence_release(void *data)
7509{
7510 struct nfs4_sequence_data *calldata = data;
7511 struct nfs_client *clp = calldata->clp;
7512
7513 if (atomic_read(&clp->cl_count) > 1)
7514 nfs4_schedule_state_renewal(clp);
7515 nfs_put_client(clp);
7516 kfree(calldata);
7517}
7518
7519static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7520{
7521 switch(task->tk_status) {
7522 case -NFS4ERR_DELAY:
7523 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7524 return -EAGAIN;
7525 default:
7526 nfs4_schedule_lease_recovery(clp);
7527 }
7528 return 0;
7529}
7530
7531static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7532{
7533 struct nfs4_sequence_data *calldata = data;
7534 struct nfs_client *clp = calldata->clp;
7535
7536 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7537 return;
7538
7539 trace_nfs4_sequence(clp, task->tk_status);
7540 if (task->tk_status < 0) {
7541 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7542 if (atomic_read(&clp->cl_count) == 1)
7543 goto out;
7544
7545 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7546 rpc_restart_call_prepare(task);
7547 return;
7548 }
7549 }
7550 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7551out:
7552 dprintk("<-- %s\n", __func__);
7553}
7554
7555static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7556{
7557 struct nfs4_sequence_data *calldata = data;
7558 struct nfs_client *clp = calldata->clp;
7559 struct nfs4_sequence_args *args;
7560 struct nfs4_sequence_res *res;
7561
7562 args = task->tk_msg.rpc_argp;
7563 res = task->tk_msg.rpc_resp;
7564
7565 nfs41_setup_sequence(clp->cl_session, args, res, task);
7566}
7567
7568static const struct rpc_call_ops nfs41_sequence_ops = {
7569 .rpc_call_done = nfs41_sequence_call_done,
7570 .rpc_call_prepare = nfs41_sequence_prepare,
7571 .rpc_release = nfs41_sequence_release,
7572};
7573
7574static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7575 struct rpc_cred *cred,
7576 bool is_privileged)
7577{
7578 struct nfs4_sequence_data *calldata;
7579 struct rpc_message msg = {
7580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7581 .rpc_cred = cred,
7582 };
7583 struct rpc_task_setup task_setup_data = {
7584 .rpc_client = clp->cl_rpcclient,
7585 .rpc_message = &msg,
7586 .callback_ops = &nfs41_sequence_ops,
7587 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7588 };
7589
7590 if (!atomic_inc_not_zero(&clp->cl_count))
7591 return ERR_PTR(-EIO);
7592 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7593 if (calldata == NULL) {
7594 nfs_put_client(clp);
7595 return ERR_PTR(-ENOMEM);
7596 }
7597 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7598 if (is_privileged)
7599 nfs4_set_sequence_privileged(&calldata->args);
7600 msg.rpc_argp = &calldata->args;
7601 msg.rpc_resp = &calldata->res;
7602 calldata->clp = clp;
7603 task_setup_data.callback_data = calldata;
7604
7605 return rpc_run_task(&task_setup_data);
7606}
7607
7608static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7609{
7610 struct rpc_task *task;
7611 int ret = 0;
7612
7613 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7614 return -EAGAIN;
7615 task = _nfs41_proc_sequence(clp, cred, false);
7616 if (IS_ERR(task))
7617 ret = PTR_ERR(task);
7618 else
7619 rpc_put_task_async(task);
7620 dprintk("<-- %s status=%d\n", __func__, ret);
7621 return ret;
7622}
7623
7624static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7625{
7626 struct rpc_task *task;
7627 int ret;
7628
7629 task = _nfs41_proc_sequence(clp, cred, true);
7630 if (IS_ERR(task)) {
7631 ret = PTR_ERR(task);
7632 goto out;
7633 }
7634 ret = rpc_wait_for_completion_task(task);
7635 if (!ret)
7636 ret = task->tk_status;
7637 rpc_put_task(task);
7638out:
7639 dprintk("<-- %s status=%d\n", __func__, ret);
7640 return ret;
7641}
7642
7643struct nfs4_reclaim_complete_data {
7644 struct nfs_client *clp;
7645 struct nfs41_reclaim_complete_args arg;
7646 struct nfs41_reclaim_complete_res res;
7647};
7648
7649static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7650{
7651 struct nfs4_reclaim_complete_data *calldata = data;
7652
7653 nfs41_setup_sequence(calldata->clp->cl_session,
7654 &calldata->arg.seq_args,
7655 &calldata->res.seq_res,
7656 task);
7657}
7658
7659static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7660{
7661 switch(task->tk_status) {
7662 case 0:
7663 case -NFS4ERR_COMPLETE_ALREADY:
7664 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7665 break;
7666 case -NFS4ERR_DELAY:
7667 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7668 /* fall through */
7669 case -NFS4ERR_RETRY_UNCACHED_REP:
7670 return -EAGAIN;
7671 default:
7672 nfs4_schedule_lease_recovery(clp);
7673 }
7674 return 0;
7675}
7676
7677static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7678{
7679 struct nfs4_reclaim_complete_data *calldata = data;
7680 struct nfs_client *clp = calldata->clp;
7681 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7682
7683 dprintk("--> %s\n", __func__);
7684 if (!nfs41_sequence_done(task, res))
7685 return;
7686
7687 trace_nfs4_reclaim_complete(clp, task->tk_status);
7688 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7689 rpc_restart_call_prepare(task);
7690 return;
7691 }
7692 dprintk("<-- %s\n", __func__);
7693}
7694
7695static void nfs4_free_reclaim_complete_data(void *data)
7696{
7697 struct nfs4_reclaim_complete_data *calldata = data;
7698
7699 kfree(calldata);
7700}
7701
7702static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7703 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7704 .rpc_call_done = nfs4_reclaim_complete_done,
7705 .rpc_release = nfs4_free_reclaim_complete_data,
7706};
7707
7708/*
7709 * Issue a global reclaim complete.
7710 */
7711static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7712 struct rpc_cred *cred)
7713{
7714 struct nfs4_reclaim_complete_data *calldata;
7715 struct rpc_task *task;
7716 struct rpc_message msg = {
7717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7718 .rpc_cred = cred,
7719 };
7720 struct rpc_task_setup task_setup_data = {
7721 .rpc_client = clp->cl_rpcclient,
7722 .rpc_message = &msg,
7723 .callback_ops = &nfs4_reclaim_complete_call_ops,
7724 .flags = RPC_TASK_ASYNC,
7725 };
7726 int status = -ENOMEM;
7727
7728 dprintk("--> %s\n", __func__);
7729 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7730 if (calldata == NULL)
7731 goto out;
7732 calldata->clp = clp;
7733 calldata->arg.one_fs = 0;
7734
7735 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7736 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7737 msg.rpc_argp = &calldata->arg;
7738 msg.rpc_resp = &calldata->res;
7739 task_setup_data.callback_data = calldata;
7740 task = rpc_run_task(&task_setup_data);
7741 if (IS_ERR(task)) {
7742 status = PTR_ERR(task);
7743 goto out;
7744 }
7745 status = nfs4_wait_for_completion_rpc_task(task);
7746 if (status == 0)
7747 status = task->tk_status;
7748 rpc_put_task(task);
7749 return 0;
7750out:
7751 dprintk("<-- %s status=%d\n", __func__, status);
7752 return status;
7753}
7754
7755static void
7756nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7757{
7758 struct nfs4_layoutget *lgp = calldata;
7759 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7760 struct nfs4_session *session = nfs4_get_session(server);
7761
7762 dprintk("--> %s\n", __func__);
7763 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7764 * right now covering the LAYOUTGET we are about to send.
7765 * However, that is not so catastrophic, and there seems
7766 * to be no way to prevent it completely.
7767 */
7768 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7769 &lgp->res.seq_res, task))
7770 return;
7771 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7772 NFS_I(lgp->args.inode)->layout,
7773 &lgp->args.range,
7774 lgp->args.ctx->state)) {
7775 rpc_exit(task, NFS4_OK);
7776 }
7777}
7778
7779static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7780{
7781 struct nfs4_layoutget *lgp = calldata;
7782 struct inode *inode = lgp->args.inode;
7783 struct nfs_server *server = NFS_SERVER(inode);
7784 struct pnfs_layout_hdr *lo;
7785 struct nfs4_state *state = NULL;
7786 unsigned long timeo, now, giveup;
7787
7788 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7789
7790 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7791 goto out;
7792
7793 switch (task->tk_status) {
7794 case 0:
7795 goto out;
7796 /*
7797 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7798 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7799 */
7800 case -NFS4ERR_BADLAYOUT:
7801 goto out_overflow;
7802 /*
7803 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7804 * (or clients) writing to the same RAID stripe except when
7805 * the minlength argument is 0 (see RFC5661 section 18.43.3).
7806 */
7807 case -NFS4ERR_LAYOUTTRYLATER:
7808 if (lgp->args.minlength == 0)
7809 goto out_overflow;
7810 /*
7811 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7812 * existing layout before getting a new one).
7813 */
7814 case -NFS4ERR_RECALLCONFLICT:
7815 timeo = rpc_get_timeout(task->tk_client);
7816 giveup = lgp->args.timestamp + timeo;
7817 now = jiffies;
7818 if (time_after(giveup, now)) {
7819 unsigned long delay;
7820
7821 /* Delay for:
7822 * - Not less then NFS4_POLL_RETRY_MIN.
7823 * - One last time a jiffie before we give up
7824 * - exponential backoff (time_now minus start_attempt)
7825 */
7826 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7827 min((giveup - now - 1),
7828 now - lgp->args.timestamp));
7829
7830 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7831 __func__, delay);
7832 rpc_delay(task, delay);
7833 /* Do not call nfs4_async_handle_error() */
7834 goto out_restart;
7835 }
7836 break;
7837 case -NFS4ERR_EXPIRED:
7838 case -NFS4ERR_BAD_STATEID:
7839 spin_lock(&inode->i_lock);
7840 if (nfs4_stateid_match(&lgp->args.stateid,
7841 &lgp->args.ctx->state->stateid)) {
7842 spin_unlock(&inode->i_lock);
7843 /* If the open stateid was bad, then recover it. */
7844 state = lgp->args.ctx->state;
7845 break;
7846 }
7847 lo = NFS_I(inode)->layout;
7848 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7849 &lo->plh_stateid)) {
7850 LIST_HEAD(head);
7851
7852 /*
7853 * Mark the bad layout state as invalid, then retry
7854 * with the current stateid.
7855 */
7856 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
7857 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7858 spin_unlock(&inode->i_lock);
7859 pnfs_free_lseg_list(&head);
7860 } else
7861 spin_unlock(&inode->i_lock);
7862 goto out_restart;
7863 }
7864 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7865 goto out_restart;
7866out:
7867 dprintk("<-- %s\n", __func__);
7868 return;
7869out_restart:
7870 task->tk_status = 0;
7871 rpc_restart_call_prepare(task);
7872 return;
7873out_overflow:
7874 task->tk_status = -EOVERFLOW;
7875 goto out;
7876}
7877
7878static size_t max_response_pages(struct nfs_server *server)
7879{
7880 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7881 return nfs_page_array_len(0, max_resp_sz);
7882}
7883
7884static void nfs4_free_pages(struct page **pages, size_t size)
7885{
7886 int i;
7887
7888 if (!pages)
7889 return;
7890
7891 for (i = 0; i < size; i++) {
7892 if (!pages[i])
7893 break;
7894 __free_page(pages[i]);
7895 }
7896 kfree(pages);
7897}
7898
7899static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7900{
7901 struct page **pages;
7902 int i;
7903
7904 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7905 if (!pages) {
7906 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7907 return NULL;
7908 }
7909
7910 for (i = 0; i < size; i++) {
7911 pages[i] = alloc_page(gfp_flags);
7912 if (!pages[i]) {
7913 dprintk("%s: failed to allocate page\n", __func__);
7914 nfs4_free_pages(pages, size);
7915 return NULL;
7916 }
7917 }
7918
7919 return pages;
7920}
7921
7922static void nfs4_layoutget_release(void *calldata)
7923{
7924 struct nfs4_layoutget *lgp = calldata;
7925 struct inode *inode = lgp->args.inode;
7926 struct nfs_server *server = NFS_SERVER(inode);
7927 size_t max_pages = max_response_pages(server);
7928
7929 dprintk("--> %s\n", __func__);
7930 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7931 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7932 put_nfs_open_context(lgp->args.ctx);
7933 kfree(calldata);
7934 dprintk("<-- %s\n", __func__);
7935}
7936
7937static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7938 .rpc_call_prepare = nfs4_layoutget_prepare,
7939 .rpc_call_done = nfs4_layoutget_done,
7940 .rpc_release = nfs4_layoutget_release,
7941};
7942
7943struct pnfs_layout_segment *
7944nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7945{
7946 struct inode *inode = lgp->args.inode;
7947 struct nfs_server *server = NFS_SERVER(inode);
7948 size_t max_pages = max_response_pages(server);
7949 struct rpc_task *task;
7950 struct rpc_message msg = {
7951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7952 .rpc_argp = &lgp->args,
7953 .rpc_resp = &lgp->res,
7954 .rpc_cred = lgp->cred,
7955 };
7956 struct rpc_task_setup task_setup_data = {
7957 .rpc_client = server->client,
7958 .rpc_message = &msg,
7959 .callback_ops = &nfs4_layoutget_call_ops,
7960 .callback_data = lgp,
7961 .flags = RPC_TASK_ASYNC,
7962 };
7963 struct pnfs_layout_segment *lseg = NULL;
7964 int status = 0;
7965
7966 dprintk("--> %s\n", __func__);
7967
7968 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7969 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7970
7971 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7972 if (!lgp->args.layout.pages) {
7973 nfs4_layoutget_release(lgp);
7974 return ERR_PTR(-ENOMEM);
7975 }
7976 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7977 lgp->args.timestamp = jiffies;
7978
7979 lgp->res.layoutp = &lgp->args.layout;
7980 lgp->res.seq_res.sr_slot = NULL;
7981 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7982
7983 task = rpc_run_task(&task_setup_data);
7984 if (IS_ERR(task))
7985 return ERR_CAST(task);
7986 status = nfs4_wait_for_completion_rpc_task(task);
7987 if (status == 0)
7988 status = task->tk_status;
7989 trace_nfs4_layoutget(lgp->args.ctx,
7990 &lgp->args.range,
7991 &lgp->res.range,
7992 status);
7993 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7994 if (status == 0 && lgp->res.layoutp->len)
7995 lseg = pnfs_layout_process(lgp);
7996 rpc_put_task(task);
7997 dprintk("<-- %s status=%d\n", __func__, status);
7998 if (status)
7999 return ERR_PTR(status);
8000 return lseg;
8001}
8002
8003static void
8004nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8005{
8006 struct nfs4_layoutreturn *lrp = calldata;
8007
8008 dprintk("--> %s\n", __func__);
8009 nfs41_setup_sequence(lrp->clp->cl_session,
8010 &lrp->args.seq_args,
8011 &lrp->res.seq_res,
8012 task);
8013}
8014
8015static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8016{
8017 struct nfs4_layoutreturn *lrp = calldata;
8018 struct nfs_server *server;
8019
8020 dprintk("--> %s\n", __func__);
8021
8022 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
8023 return;
8024
8025 server = NFS_SERVER(lrp->args.inode);
8026 switch (task->tk_status) {
8027 default:
8028 task->tk_status = 0;
8029 case 0:
8030 break;
8031 case -NFS4ERR_DELAY:
8032 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8033 break;
8034 rpc_restart_call_prepare(task);
8035 return;
8036 }
8037 dprintk("<-- %s\n", __func__);
8038}
8039
8040static void nfs4_layoutreturn_release(void *calldata)
8041{
8042 struct nfs4_layoutreturn *lrp = calldata;
8043 struct pnfs_layout_hdr *lo = lrp->args.layout;
8044 LIST_HEAD(freeme);
8045
8046 dprintk("--> %s\n", __func__);
8047 spin_lock(&lo->plh_inode->i_lock);
8048 if (lrp->res.lrs_present)
8049 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
8050 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8051 pnfs_clear_layoutreturn_waitbit(lo);
8052 lo->plh_block_lgets--;
8053 spin_unlock(&lo->plh_inode->i_lock);
8054 pnfs_free_lseg_list(&freeme);
8055 pnfs_put_layout_hdr(lrp->args.layout);
8056 nfs_iput_and_deactive(lrp->inode);
8057 kfree(calldata);
8058 dprintk("<-- %s\n", __func__);
8059}
8060
8061static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8062 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8063 .rpc_call_done = nfs4_layoutreturn_done,
8064 .rpc_release = nfs4_layoutreturn_release,
8065};
8066
8067int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8068{
8069 struct rpc_task *task;
8070 struct rpc_message msg = {
8071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8072 .rpc_argp = &lrp->args,
8073 .rpc_resp = &lrp->res,
8074 .rpc_cred = lrp->cred,
8075 };
8076 struct rpc_task_setup task_setup_data = {
8077 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8078 .rpc_message = &msg,
8079 .callback_ops = &nfs4_layoutreturn_call_ops,
8080 .callback_data = lrp,
8081 };
8082 int status = 0;
8083
8084 dprintk("--> %s\n", __func__);
8085 if (!sync) {
8086 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8087 if (!lrp->inode) {
8088 nfs4_layoutreturn_release(lrp);
8089 return -EAGAIN;
8090 }
8091 task_setup_data.flags |= RPC_TASK_ASYNC;
8092 }
8093 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8094 task = rpc_run_task(&task_setup_data);
8095 if (IS_ERR(task))
8096 return PTR_ERR(task);
8097 if (sync)
8098 status = task->tk_status;
8099 trace_nfs4_layoutreturn(lrp->args.inode, status);
8100 dprintk("<-- %s status=%d\n", __func__, status);
8101 rpc_put_task(task);
8102 return status;
8103}
8104
8105static int
8106_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8107 struct pnfs_device *pdev,
8108 struct rpc_cred *cred)
8109{
8110 struct nfs4_getdeviceinfo_args args = {
8111 .pdev = pdev,
8112 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8113 NOTIFY_DEVICEID4_DELETE,
8114 };
8115 struct nfs4_getdeviceinfo_res res = {
8116 .pdev = pdev,
8117 };
8118 struct rpc_message msg = {
8119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8120 .rpc_argp = &args,
8121 .rpc_resp = &res,
8122 .rpc_cred = cred,
8123 };
8124 int status;
8125
8126 dprintk("--> %s\n", __func__);
8127 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8128 if (res.notification & ~args.notify_types)
8129 dprintk("%s: unsupported notification\n", __func__);
8130 if (res.notification != args.notify_types)
8131 pdev->nocache = 1;
8132
8133 dprintk("<-- %s status=%d\n", __func__, status);
8134
8135 return status;
8136}
8137
8138int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8139 struct pnfs_device *pdev,
8140 struct rpc_cred *cred)
8141{
8142 struct nfs4_exception exception = { };
8143 int err;
8144
8145 do {
8146 err = nfs4_handle_exception(server,
8147 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8148 &exception);
8149 } while (exception.retry);
8150 return err;
8151}
8152EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8153
8154static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8155{
8156 struct nfs4_layoutcommit_data *data = calldata;
8157 struct nfs_server *server = NFS_SERVER(data->args.inode);
8158 struct nfs4_session *session = nfs4_get_session(server);
8159
8160 nfs41_setup_sequence(session,
8161 &data->args.seq_args,
8162 &data->res.seq_res,
8163 task);
8164}
8165
8166static void
8167nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8168{
8169 struct nfs4_layoutcommit_data *data = calldata;
8170 struct nfs_server *server = NFS_SERVER(data->args.inode);
8171
8172 if (!nfs41_sequence_done(task, &data->res.seq_res))
8173 return;
8174
8175 switch (task->tk_status) { /* Just ignore these failures */
8176 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8177 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8178 case -NFS4ERR_BADLAYOUT: /* no layout */
8179 case -NFS4ERR_GRACE: /* loca_recalim always false */
8180 task->tk_status = 0;
8181 case 0:
8182 break;
8183 default:
8184 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8185 rpc_restart_call_prepare(task);
8186 return;
8187 }
8188 }
8189}
8190
8191static void nfs4_layoutcommit_release(void *calldata)
8192{
8193 struct nfs4_layoutcommit_data *data = calldata;
8194
8195 pnfs_cleanup_layoutcommit(data);
8196 nfs_post_op_update_inode_force_wcc(data->args.inode,
8197 data->res.fattr);
8198 put_rpccred(data->cred);
8199 nfs_iput_and_deactive(data->inode);
8200 kfree(data);
8201}
8202
8203static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8204 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8205 .rpc_call_done = nfs4_layoutcommit_done,
8206 .rpc_release = nfs4_layoutcommit_release,
8207};
8208
8209int
8210nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8211{
8212 struct rpc_message msg = {
8213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8214 .rpc_argp = &data->args,
8215 .rpc_resp = &data->res,
8216 .rpc_cred = data->cred,
8217 };
8218 struct rpc_task_setup task_setup_data = {
8219 .task = &data->task,
8220 .rpc_client = NFS_CLIENT(data->args.inode),
8221 .rpc_message = &msg,
8222 .callback_ops = &nfs4_layoutcommit_ops,
8223 .callback_data = data,
8224 };
8225 struct rpc_task *task;
8226 int status = 0;
8227
8228 dprintk("NFS: initiating layoutcommit call. sync %d "
8229 "lbw: %llu inode %lu\n", sync,
8230 data->args.lastbytewritten,
8231 data->args.inode->i_ino);
8232
8233 if (!sync) {
8234 data->inode = nfs_igrab_and_active(data->args.inode);
8235 if (data->inode == NULL) {
8236 nfs4_layoutcommit_release(data);
8237 return -EAGAIN;
8238 }
8239 task_setup_data.flags = RPC_TASK_ASYNC;
8240 }
8241 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8242 task = rpc_run_task(&task_setup_data);
8243 if (IS_ERR(task))
8244 return PTR_ERR(task);
8245 if (sync)
8246 status = task->tk_status;
8247 trace_nfs4_layoutcommit(data->args.inode, status);
8248 dprintk("%s: status %d\n", __func__, status);
8249 rpc_put_task(task);
8250 return status;
8251}
8252
8253/**
8254 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8255 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8256 */
8257static int
8258_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8259 struct nfs_fsinfo *info,
8260 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8261{
8262 struct nfs41_secinfo_no_name_args args = {
8263 .style = SECINFO_STYLE_CURRENT_FH,
8264 };
8265 struct nfs4_secinfo_res res = {
8266 .flavors = flavors,
8267 };
8268 struct rpc_message msg = {
8269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8270 .rpc_argp = &args,
8271 .rpc_resp = &res,
8272 };
8273 struct rpc_clnt *clnt = server->client;
8274 struct rpc_cred *cred = NULL;
8275 int status;
8276
8277 if (use_integrity) {
8278 clnt = server->nfs_client->cl_rpcclient;
8279 cred = nfs4_get_clid_cred(server->nfs_client);
8280 msg.rpc_cred = cred;
8281 }
8282
8283 dprintk("--> %s\n", __func__);
8284 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8285 &res.seq_res, 0);
8286 dprintk("<-- %s status=%d\n", __func__, status);
8287
8288 if (cred)
8289 put_rpccred(cred);
8290
8291 return status;
8292}
8293
8294static int
8295nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8296 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8297{
8298 struct nfs4_exception exception = { };
8299 int err;
8300 do {
8301 /* first try using integrity protection */
8302 err = -NFS4ERR_WRONGSEC;
8303
8304 /* try to use integrity protection with machine cred */
8305 if (_nfs4_is_integrity_protected(server->nfs_client))
8306 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8307 flavors, true);
8308
8309 /*
8310 * if unable to use integrity protection, or SECINFO with
8311 * integrity protection returns NFS4ERR_WRONGSEC (which is
8312 * disallowed by spec, but exists in deployed servers) use
8313 * the current filesystem's rpc_client and the user cred.
8314 */
8315 if (err == -NFS4ERR_WRONGSEC)
8316 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8317 flavors, false);
8318
8319 switch (err) {
8320 case 0:
8321 case -NFS4ERR_WRONGSEC:
8322 case -ENOTSUPP:
8323 goto out;
8324 default:
8325 err = nfs4_handle_exception(server, err, &exception);
8326 }
8327 } while (exception.retry);
8328out:
8329 return err;
8330}
8331
8332static int
8333nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8334 struct nfs_fsinfo *info)
8335{
8336 int err;
8337 struct page *page;
8338 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8339 struct nfs4_secinfo_flavors *flavors;
8340 struct nfs4_secinfo4 *secinfo;
8341 int i;
8342
8343 page = alloc_page(GFP_KERNEL);
8344 if (!page) {
8345 err = -ENOMEM;
8346 goto out;
8347 }
8348
8349 flavors = page_address(page);
8350 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8351
8352 /*
8353 * Fall back on "guess and check" method if
8354 * the server doesn't support SECINFO_NO_NAME
8355 */
8356 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8357 err = nfs4_find_root_sec(server, fhandle, info);
8358 goto out_freepage;
8359 }
8360 if (err)
8361 goto out_freepage;
8362
8363 for (i = 0; i < flavors->num_flavors; i++) {
8364 secinfo = &flavors->flavors[i];
8365
8366 switch (secinfo->flavor) {
8367 case RPC_AUTH_NULL:
8368 case RPC_AUTH_UNIX:
8369 case RPC_AUTH_GSS:
8370 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8371 &secinfo->flavor_info);
8372 break;
8373 default:
8374 flavor = RPC_AUTH_MAXFLAVOR;
8375 break;
8376 }
8377
8378 if (!nfs_auth_info_match(&server->auth_info, flavor))
8379 flavor = RPC_AUTH_MAXFLAVOR;
8380
8381 if (flavor != RPC_AUTH_MAXFLAVOR) {
8382 err = nfs4_lookup_root_sec(server, fhandle,
8383 info, flavor);
8384 if (!err)
8385 break;
8386 }
8387 }
8388
8389 if (flavor == RPC_AUTH_MAXFLAVOR)
8390 err = -EPERM;
8391
8392out_freepage:
8393 put_page(page);
8394 if (err == -EACCES)
8395 return -EPERM;
8396out:
8397 return err;
8398}
8399
8400static int _nfs41_test_stateid(struct nfs_server *server,
8401 nfs4_stateid *stateid,
8402 struct rpc_cred *cred)
8403{
8404 int status;
8405 struct nfs41_test_stateid_args args = {
8406 .stateid = stateid,
8407 };
8408 struct nfs41_test_stateid_res res;
8409 struct rpc_message msg = {
8410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8411 .rpc_argp = &args,
8412 .rpc_resp = &res,
8413 .rpc_cred = cred,
8414 };
8415 struct rpc_clnt *rpc_client = server->client;
8416
8417 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8418 &rpc_client, &msg);
8419
8420 dprintk("NFS call test_stateid %p\n", stateid);
8421 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8422 nfs4_set_sequence_privileged(&args.seq_args);
8423 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8424 &args.seq_args, &res.seq_res);
8425 if (status != NFS_OK) {
8426 dprintk("NFS reply test_stateid: failed, %d\n", status);
8427 return status;
8428 }
8429 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8430 return -res.status;
8431}
8432
8433/**
8434 * nfs41_test_stateid - perform a TEST_STATEID operation
8435 *
8436 * @server: server / transport on which to perform the operation
8437 * @stateid: state ID to test
8438 * @cred: credential
8439 *
8440 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8441 * Otherwise a negative NFS4ERR value is returned if the operation
8442 * failed or the state ID is not currently valid.
8443 */
8444static int nfs41_test_stateid(struct nfs_server *server,
8445 nfs4_stateid *stateid,
8446 struct rpc_cred *cred)
8447{
8448 struct nfs4_exception exception = { };
8449 int err;
8450 do {
8451 err = _nfs41_test_stateid(server, stateid, cred);
8452 if (err != -NFS4ERR_DELAY)
8453 break;
8454 nfs4_handle_exception(server, err, &exception);
8455 } while (exception.retry);
8456 return err;
8457}
8458
8459struct nfs_free_stateid_data {
8460 struct nfs_server *server;
8461 struct nfs41_free_stateid_args args;
8462 struct nfs41_free_stateid_res res;
8463};
8464
8465static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8466{
8467 struct nfs_free_stateid_data *data = calldata;
8468 nfs41_setup_sequence(nfs4_get_session(data->server),
8469 &data->args.seq_args,
8470 &data->res.seq_res,
8471 task);
8472}
8473
8474static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8475{
8476 struct nfs_free_stateid_data *data = calldata;
8477
8478 nfs41_sequence_done(task, &data->res.seq_res);
8479
8480 switch (task->tk_status) {
8481 case -NFS4ERR_DELAY:
8482 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8483 rpc_restart_call_prepare(task);
8484 }
8485}
8486
8487static void nfs41_free_stateid_release(void *calldata)
8488{
8489 kfree(calldata);
8490}
8491
8492static const struct rpc_call_ops nfs41_free_stateid_ops = {
8493 .rpc_call_prepare = nfs41_free_stateid_prepare,
8494 .rpc_call_done = nfs41_free_stateid_done,
8495 .rpc_release = nfs41_free_stateid_release,
8496};
8497
8498static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8499 nfs4_stateid *stateid,
8500 struct rpc_cred *cred,
8501 bool privileged)
8502{
8503 struct rpc_message msg = {
8504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8505 .rpc_cred = cred,
8506 };
8507 struct rpc_task_setup task_setup = {
8508 .rpc_client = server->client,
8509 .rpc_message = &msg,
8510 .callback_ops = &nfs41_free_stateid_ops,
8511 .flags = RPC_TASK_ASYNC,
8512 };
8513 struct nfs_free_stateid_data *data;
8514
8515 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8516 &task_setup.rpc_client, &msg);
8517
8518 dprintk("NFS call free_stateid %p\n", stateid);
8519 data = kmalloc(sizeof(*data), GFP_NOFS);
8520 if (!data)
8521 return ERR_PTR(-ENOMEM);
8522 data->server = server;
8523 nfs4_stateid_copy(&data->args.stateid, stateid);
8524
8525 task_setup.callback_data = data;
8526
8527 msg.rpc_argp = &data->args;
8528 msg.rpc_resp = &data->res;
8529 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8530 if (privileged)
8531 nfs4_set_sequence_privileged(&data->args.seq_args);
8532
8533 return rpc_run_task(&task_setup);
8534}
8535
8536/**
8537 * nfs41_free_stateid - perform a FREE_STATEID operation
8538 *
8539 * @server: server / transport on which to perform the operation
8540 * @stateid: state ID to release
8541 * @cred: credential
8542 *
8543 * Returns NFS_OK if the server freed "stateid". Otherwise a
8544 * negative NFS4ERR value is returned.
8545 */
8546static int nfs41_free_stateid(struct nfs_server *server,
8547 nfs4_stateid *stateid,
8548 struct rpc_cred *cred)
8549{
8550 struct rpc_task *task;
8551 int ret;
8552
8553 task = _nfs41_free_stateid(server, stateid, cred, true);
8554 if (IS_ERR(task))
8555 return PTR_ERR(task);
8556 ret = rpc_wait_for_completion_task(task);
8557 if (!ret)
8558 ret = task->tk_status;
8559 rpc_put_task(task);
8560 return ret;
8561}
8562
8563static void
8564nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8565{
8566 struct rpc_task *task;
8567 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8568
8569 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8570 nfs4_free_lock_state(server, lsp);
8571 if (IS_ERR(task))
8572 return;
8573 rpc_put_task(task);
8574}
8575
8576static bool nfs41_match_stateid(const nfs4_stateid *s1,
8577 const nfs4_stateid *s2)
8578{
8579 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8580 return false;
8581
8582 if (s1->seqid == s2->seqid)
8583 return true;
8584 if (s1->seqid == 0 || s2->seqid == 0)
8585 return true;
8586
8587 return false;
8588}
8589
8590#endif /* CONFIG_NFS_V4_1 */
8591
8592static bool nfs4_match_stateid(const nfs4_stateid *s1,
8593 const nfs4_stateid *s2)
8594{
8595 return nfs4_stateid_match(s1, s2);
8596}
8597
8598
8599static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8600 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8601 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8602 .recover_open = nfs4_open_reclaim,
8603 .recover_lock = nfs4_lock_reclaim,
8604 .establish_clid = nfs4_init_clientid,
8605 .detect_trunking = nfs40_discover_server_trunking,
8606};
8607
8608#if defined(CONFIG_NFS_V4_1)
8609static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8610 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8611 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8612 .recover_open = nfs4_open_reclaim,
8613 .recover_lock = nfs4_lock_reclaim,
8614 .establish_clid = nfs41_init_clientid,
8615 .reclaim_complete = nfs41_proc_reclaim_complete,
8616 .detect_trunking = nfs41_discover_server_trunking,
8617};
8618#endif /* CONFIG_NFS_V4_1 */
8619
8620static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8621 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8622 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8623 .recover_open = nfs40_open_expired,
8624 .recover_lock = nfs4_lock_expired,
8625 .establish_clid = nfs4_init_clientid,
8626};
8627
8628#if defined(CONFIG_NFS_V4_1)
8629static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8630 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8631 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8632 .recover_open = nfs41_open_expired,
8633 .recover_lock = nfs41_lock_expired,
8634 .establish_clid = nfs41_init_clientid,
8635};
8636#endif /* CONFIG_NFS_V4_1 */
8637
8638static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8639 .sched_state_renewal = nfs4_proc_async_renew,
8640 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8641 .renew_lease = nfs4_proc_renew,
8642};
8643
8644#if defined(CONFIG_NFS_V4_1)
8645static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8646 .sched_state_renewal = nfs41_proc_async_sequence,
8647 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8648 .renew_lease = nfs4_proc_sequence,
8649};
8650#endif
8651
8652static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8653 .get_locations = _nfs40_proc_get_locations,
8654 .fsid_present = _nfs40_proc_fsid_present,
8655};
8656
8657#if defined(CONFIG_NFS_V4_1)
8658static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8659 .get_locations = _nfs41_proc_get_locations,
8660 .fsid_present = _nfs41_proc_fsid_present,
8661};
8662#endif /* CONFIG_NFS_V4_1 */
8663
8664static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8665 .minor_version = 0,
8666 .init_caps = NFS_CAP_READDIRPLUS
8667 | NFS_CAP_ATOMIC_OPEN
8668 | NFS_CAP_POSIX_LOCK,
8669 .init_client = nfs40_init_client,
8670 .shutdown_client = nfs40_shutdown_client,
8671 .match_stateid = nfs4_match_stateid,
8672 .find_root_sec = nfs4_find_root_sec,
8673 .free_lock_state = nfs4_release_lockowner,
8674 .alloc_seqid = nfs_alloc_seqid,
8675 .call_sync_ops = &nfs40_call_sync_ops,
8676 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8677 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8678 .state_renewal_ops = &nfs40_state_renewal_ops,
8679 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8680};
8681
8682#if defined(CONFIG_NFS_V4_1)
8683static struct nfs_seqid *
8684nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8685{
8686 return NULL;
8687}
8688
8689static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8690 .minor_version = 1,
8691 .init_caps = NFS_CAP_READDIRPLUS
8692 | NFS_CAP_ATOMIC_OPEN
8693 | NFS_CAP_POSIX_LOCK
8694 | NFS_CAP_STATEID_NFSV41
8695 | NFS_CAP_ATOMIC_OPEN_V1,
8696 .init_client = nfs41_init_client,
8697 .shutdown_client = nfs41_shutdown_client,
8698 .match_stateid = nfs41_match_stateid,
8699 .find_root_sec = nfs41_find_root_sec,
8700 .free_lock_state = nfs41_free_lock_state,
8701 .alloc_seqid = nfs_alloc_no_seqid,
8702 .call_sync_ops = &nfs41_call_sync_ops,
8703 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8704 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8705 .state_renewal_ops = &nfs41_state_renewal_ops,
8706 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8707};
8708#endif
8709
8710#if defined(CONFIG_NFS_V4_2)
8711static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8712 .minor_version = 2,
8713 .init_caps = NFS_CAP_READDIRPLUS
8714 | NFS_CAP_ATOMIC_OPEN
8715 | NFS_CAP_POSIX_LOCK
8716 | NFS_CAP_STATEID_NFSV41
8717 | NFS_CAP_ATOMIC_OPEN_V1
8718 | NFS_CAP_ALLOCATE
8719 | NFS_CAP_DEALLOCATE
8720 | NFS_CAP_SEEK
8721 | NFS_CAP_LAYOUTSTATS,
8722 .init_client = nfs41_init_client,
8723 .shutdown_client = nfs41_shutdown_client,
8724 .match_stateid = nfs41_match_stateid,
8725 .find_root_sec = nfs41_find_root_sec,
8726 .free_lock_state = nfs41_free_lock_state,
8727 .call_sync_ops = &nfs41_call_sync_ops,
8728 .alloc_seqid = nfs_alloc_no_seqid,
8729 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8730 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8731 .state_renewal_ops = &nfs41_state_renewal_ops,
8732 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8733};
8734#endif
8735
8736const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8737 [0] = &nfs_v4_0_minor_ops,
8738#if defined(CONFIG_NFS_V4_1)
8739 [1] = &nfs_v4_1_minor_ops,
8740#endif
8741#if defined(CONFIG_NFS_V4_2)
8742 [2] = &nfs_v4_2_minor_ops,
8743#endif
8744};
8745
8746static const struct inode_operations nfs4_dir_inode_operations = {
8747 .create = nfs_create,
8748 .lookup = nfs_lookup,
8749 .atomic_open = nfs_atomic_open,
8750 .link = nfs_link,
8751 .unlink = nfs_unlink,
8752 .symlink = nfs_symlink,
8753 .mkdir = nfs_mkdir,
8754 .rmdir = nfs_rmdir,
8755 .mknod = nfs_mknod,
8756 .rename = nfs_rename,
8757 .permission = nfs_permission,
8758 .getattr = nfs_getattr,
8759 .setattr = nfs_setattr,
8760 .getxattr = generic_getxattr,
8761 .setxattr = generic_setxattr,
8762 .listxattr = generic_listxattr,
8763 .removexattr = generic_removexattr,
8764};
8765
8766static const struct inode_operations nfs4_file_inode_operations = {
8767 .permission = nfs_permission,
8768 .getattr = nfs_getattr,
8769 .setattr = nfs_setattr,
8770 .getxattr = generic_getxattr,
8771 .setxattr = generic_setxattr,
8772 .listxattr = generic_listxattr,
8773 .removexattr = generic_removexattr,
8774};
8775
8776const struct nfs_rpc_ops nfs_v4_clientops = {
8777 .version = 4, /* protocol version */
8778 .dentry_ops = &nfs4_dentry_operations,
8779 .dir_inode_ops = &nfs4_dir_inode_operations,
8780 .file_inode_ops = &nfs4_file_inode_operations,
8781 .file_ops = &nfs4_file_operations,
8782 .getroot = nfs4_proc_get_root,
8783 .submount = nfs4_submount,
8784 .try_mount = nfs4_try_mount,
8785 .getattr = nfs4_proc_getattr,
8786 .setattr = nfs4_proc_setattr,
8787 .lookup = nfs4_proc_lookup,
8788 .access = nfs4_proc_access,
8789 .readlink = nfs4_proc_readlink,
8790 .create = nfs4_proc_create,
8791 .remove = nfs4_proc_remove,
8792 .unlink_setup = nfs4_proc_unlink_setup,
8793 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8794 .unlink_done = nfs4_proc_unlink_done,
8795 .rename_setup = nfs4_proc_rename_setup,
8796 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8797 .rename_done = nfs4_proc_rename_done,
8798 .link = nfs4_proc_link,
8799 .symlink = nfs4_proc_symlink,
8800 .mkdir = nfs4_proc_mkdir,
8801 .rmdir = nfs4_proc_remove,
8802 .readdir = nfs4_proc_readdir,
8803 .mknod = nfs4_proc_mknod,
8804 .statfs = nfs4_proc_statfs,
8805 .fsinfo = nfs4_proc_fsinfo,
8806 .pathconf = nfs4_proc_pathconf,
8807 .set_capabilities = nfs4_server_capabilities,
8808 .decode_dirent = nfs4_decode_dirent,
8809 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8810 .read_setup = nfs4_proc_read_setup,
8811 .read_done = nfs4_read_done,
8812 .write_setup = nfs4_proc_write_setup,
8813 .write_done = nfs4_write_done,
8814 .commit_setup = nfs4_proc_commit_setup,
8815 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8816 .commit_done = nfs4_commit_done,
8817 .lock = nfs4_proc_lock,
8818 .clear_acl_cache = nfs4_zap_acl_attr,
8819 .close_context = nfs4_close_context,
8820 .open_context = nfs4_atomic_open,
8821 .have_delegation = nfs4_have_delegation,
8822 .return_delegation = nfs4_inode_return_delegation,
8823 .alloc_client = nfs4_alloc_client,
8824 .init_client = nfs4_init_client,
8825 .free_client = nfs4_free_client,
8826 .create_server = nfs4_create_server,
8827 .clone_server = nfs_clone_server,
8828};
8829
8830static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8831 .prefix = XATTR_NAME_NFSV4_ACL,
8832 .list = nfs4_xattr_list_nfs4_acl,
8833 .get = nfs4_xattr_get_nfs4_acl,
8834 .set = nfs4_xattr_set_nfs4_acl,
8835};
8836
8837const struct xattr_handler *nfs4_xattr_handlers[] = {
8838 &nfs4_xattr_nfs4_acl_handler,
8839#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8840 &nfs4_xattr_nfs4_label_handler,
8841#endif
8842 NULL
8843};
8844
8845/*
8846 * Local variables:
8847 * c-basic-offset: 8
8848 * End:
8849 */
Linux 6.x block layer and io_uring tree(s)