]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - fs/nfs/nfs4proc.c
NFSv4: don't reprocess cached open CLAIM_PREVIOUS
[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs4proc.c
1 /*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/mm.h>
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
58
59 #include "nfs4_fs.h"
60 #include "delegation.h"
61 #include "internal.h"
62 #include "iostat.h"
63 #include "callback.h"
64 #include "pnfs.h"
65 #include "netns.h"
66 #include "nfs4session.h"
67 #include "fscache.h"
68
69 #include "nfs4trace.h"
70
71 #define NFSDBG_FACILITY NFSDBG_PROC
72
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
75
76 struct nfs4_opendata;
77 static int _nfs4_proc_open(struct nfs4_opendata *data);
78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88 #ifdef CONFIG_NFS_V4_1
89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
93 #endif
94
95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
96 static inline struct nfs4_label *
97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99 {
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117 }
118 static inline void
119 nfs4_label_release_security(struct nfs4_label *label)
120 {
121 if (label)
122 security_release_secctx(label->label, label->len);
123 }
124 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125 {
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130 }
131 #else
132 static inline struct nfs4_label *
133 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135 { return NULL; }
136 static inline void
137 nfs4_label_release_security(struct nfs4_label *label)
138 { return; }
139 static inline u32 *
140 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141 { return server->attr_bitmask; }
142 #endif
143
144 /* Prevent leaks of NFSv4 errors into userland */
145 static int nfs4_map_errors(int err)
146 {
147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
153 return -EREMOTEIO;
154 case -NFS4ERR_WRONGSEC:
155 case -NFS4ERR_WRONG_CRED:
156 return -EPERM;
157 case -NFS4ERR_BADOWNER:
158 case -NFS4ERR_BADNAME:
159 return -EINVAL;
160 case -NFS4ERR_SHARE_DENIED:
161 return -EACCES;
162 case -NFS4ERR_MINOR_VERS_MISMATCH:
163 return -EPROTONOSUPPORT;
164 case -NFS4ERR_ACCESS:
165 return -EACCES;
166 case -NFS4ERR_FILE_OPEN:
167 return -EBUSY;
168 default:
169 dprintk("%s could not handle NFSv4 error %d\n",
170 __func__, -err);
171 break;
172 }
173 return -EIO;
174 }
175
176 /*
177 * This is our standard bitmap for GETATTR requests.
178 */
179 const u32 nfs4_fattr_bitmap[3] = {
180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID,
185 FATTR4_WORD1_MODE
186 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER
188 | FATTR4_WORD1_OWNER_GROUP
189 | FATTR4_WORD1_RAWDEV
190 | FATTR4_WORD1_SPACE_USED
191 | FATTR4_WORD1_TIME_ACCESS
192 | FATTR4_WORD1_TIME_METADATA
193 | FATTR4_WORD1_TIME_MODIFY,
194 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
195 FATTR4_WORD2_SECURITY_LABEL
196 #endif
197 };
198
199 static const u32 nfs4_pnfs_open_bitmap[3] = {
200 FATTR4_WORD0_TYPE
201 | FATTR4_WORD0_CHANGE
202 | FATTR4_WORD0_SIZE
203 | FATTR4_WORD0_FSID
204 | FATTR4_WORD0_FILEID,
205 FATTR4_WORD1_MODE
206 | FATTR4_WORD1_NUMLINKS
207 | FATTR4_WORD1_OWNER
208 | FATTR4_WORD1_OWNER_GROUP
209 | FATTR4_WORD1_RAWDEV
210 | FATTR4_WORD1_SPACE_USED
211 | FATTR4_WORD1_TIME_ACCESS
212 | FATTR4_WORD1_TIME_METADATA
213 | FATTR4_WORD1_TIME_MODIFY,
214 FATTR4_WORD2_MDSTHRESHOLD
215 };
216
217 static const u32 nfs4_open_noattr_bitmap[3] = {
218 FATTR4_WORD0_TYPE
219 | FATTR4_WORD0_CHANGE
220 | FATTR4_WORD0_FILEID,
221 };
222
223 const u32 nfs4_statfs_bitmap[3] = {
224 FATTR4_WORD0_FILES_AVAIL
225 | FATTR4_WORD0_FILES_FREE
226 | FATTR4_WORD0_FILES_TOTAL,
227 FATTR4_WORD1_SPACE_AVAIL
228 | FATTR4_WORD1_SPACE_FREE
229 | FATTR4_WORD1_SPACE_TOTAL
230 };
231
232 const u32 nfs4_pathconf_bitmap[3] = {
233 FATTR4_WORD0_MAXLINK
234 | FATTR4_WORD0_MAXNAME,
235 0
236 };
237
238 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
239 | FATTR4_WORD0_MAXREAD
240 | FATTR4_WORD0_MAXWRITE
241 | FATTR4_WORD0_LEASE_TIME,
242 FATTR4_WORD1_TIME_DELTA
243 | FATTR4_WORD1_FS_LAYOUT_TYPES,
244 FATTR4_WORD2_LAYOUT_BLKSIZE
245 };
246
247 const u32 nfs4_fs_locations_bitmap[3] = {
248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
264 };
265
266 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
267 struct nfs4_readdir_arg *readdir)
268 {
269 __be32 *start, *p;
270
271 if (cookie > 2) {
272 readdir->cookie = cookie;
273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
289 start = p = kmap_atomic(*readdir->pages);
290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
301 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
313 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
317 kunmap_atomic(start);
318 }
319
320 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
321 {
322 int res = 0;
323
324 might_sleep();
325
326 if (*timeout <= 0)
327 *timeout = NFS4_POLL_RETRY_MIN;
328 if (*timeout > NFS4_POLL_RETRY_MAX)
329 *timeout = NFS4_POLL_RETRY_MAX;
330 freezable_schedule_timeout_killable_unsafe(*timeout);
331 if (fatal_signal_pending(current))
332 res = -ERESTARTSYS;
333 *timeout <<= 1;
334 return res;
335 }
336
337 /* This is the error handling routine for processes that are allowed
338 * to sleep.
339 */
340 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
341 {
342 struct nfs_client *clp = server->nfs_client;
343 struct nfs4_state *state = exception->state;
344 struct inode *inode = exception->inode;
345 int ret = errorcode;
346
347 exception->retry = 0;
348 switch(errorcode) {
349 case 0:
350 return 0;
351 case -NFS4ERR_OPENMODE:
352 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
353 nfs4_inode_return_delegation(inode);
354 exception->retry = 1;
355 return 0;
356 }
357 if (state == NULL)
358 break;
359 ret = nfs4_schedule_stateid_recovery(server, state);
360 if (ret < 0)
361 break;
362 goto wait_on_recovery;
363 case -NFS4ERR_DELEG_REVOKED:
364 case -NFS4ERR_ADMIN_REVOKED:
365 case -NFS4ERR_BAD_STATEID:
366 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
367 nfs_remove_bad_delegation(inode);
368 exception->retry = 1;
369 break;
370 }
371 if (state == NULL)
372 break;
373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
376 goto wait_on_recovery;
377 case -NFS4ERR_EXPIRED:
378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
383 case -NFS4ERR_STALE_STATEID:
384 case -NFS4ERR_STALE_CLIENTID:
385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
387 #if defined(CONFIG_NFS_V4_1)
388 case -NFS4ERR_BADSESSION:
389 case -NFS4ERR_BADSLOT:
390 case -NFS4ERR_BAD_HIGH_SLOT:
391 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
392 case -NFS4ERR_DEADSESSION:
393 case -NFS4ERR_SEQ_FALSE_RETRY:
394 case -NFS4ERR_SEQ_MISORDERED:
395 dprintk("%s ERROR: %d Reset session\n", __func__,
396 errorcode);
397 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
398 goto wait_on_recovery;
399 #endif /* defined(CONFIG_NFS_V4_1) */
400 case -NFS4ERR_FILE_OPEN:
401 if (exception->timeout > HZ) {
402 /* We have retried a decent amount, time to
403 * fail
404 */
405 ret = -EBUSY;
406 break;
407 }
408 case -NFS4ERR_GRACE:
409 case -NFS4ERR_DELAY:
410 ret = nfs4_delay(server->client, &exception->timeout);
411 if (ret != 0)
412 break;
413 case -NFS4ERR_RETRY_UNCACHED_REP:
414 case -NFS4ERR_OLD_STATEID:
415 exception->retry = 1;
416 break;
417 case -NFS4ERR_BADOWNER:
418 /* The following works around a Linux server bug! */
419 case -NFS4ERR_BADNAME:
420 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
421 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
422 exception->retry = 1;
423 printk(KERN_WARNING "NFS: v4 server %s "
424 "does not accept raw "
425 "uid/gids. "
426 "Reenabling the idmapper.\n",
427 server->nfs_client->cl_hostname);
428 }
429 }
430 /* We failed to handle the error */
431 return nfs4_map_errors(ret);
432 wait_on_recovery:
433 ret = nfs4_wait_clnt_recover(clp);
434 if (ret == 0)
435 exception->retry = 1;
436 return ret;
437 }
438
439 /*
440 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
441 * or 'false' otherwise.
442 */
443 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
444 {
445 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
446
447 if (flavor == RPC_AUTH_GSS_KRB5I ||
448 flavor == RPC_AUTH_GSS_KRB5P)
449 return true;
450
451 return false;
452 }
453
454 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
455 {
456 spin_lock(&clp->cl_lock);
457 if (time_before(clp->cl_last_renewal,timestamp))
458 clp->cl_last_renewal = timestamp;
459 spin_unlock(&clp->cl_lock);
460 }
461
462 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
463 {
464 do_renew_lease(server->nfs_client, timestamp);
465 }
466
467 struct nfs4_call_sync_data {
468 const struct nfs_server *seq_server;
469 struct nfs4_sequence_args *seq_args;
470 struct nfs4_sequence_res *seq_res;
471 };
472
473 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
474 struct nfs4_sequence_res *res, int cache_reply)
475 {
476 args->sa_slot = NULL;
477 args->sa_cache_this = cache_reply;
478 args->sa_privileged = 0;
479
480 res->sr_slot = NULL;
481 }
482
483 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
484 {
485 args->sa_privileged = 1;
486 }
487
488 static int nfs40_setup_sequence(const struct nfs_server *server,
489 struct nfs4_sequence_args *args,
490 struct nfs4_sequence_res *res,
491 struct rpc_task *task)
492 {
493 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
494 struct nfs4_slot *slot;
495
496 /* slot already allocated? */
497 if (res->sr_slot != NULL)
498 goto out_start;
499
500 spin_lock(&tbl->slot_tbl_lock);
501 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
502 goto out_sleep;
503
504 slot = nfs4_alloc_slot(tbl);
505 if (IS_ERR(slot)) {
506 if (slot == ERR_PTR(-ENOMEM))
507 task->tk_timeout = HZ >> 2;
508 goto out_sleep;
509 }
510 spin_unlock(&tbl->slot_tbl_lock);
511
512 args->sa_slot = slot;
513 res->sr_slot = slot;
514
515 out_start:
516 rpc_call_start(task);
517 return 0;
518
519 out_sleep:
520 if (args->sa_privileged)
521 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
522 NULL, RPC_PRIORITY_PRIVILEGED);
523 else
524 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
525 spin_unlock(&tbl->slot_tbl_lock);
526 return -EAGAIN;
527 }
528
529 static int nfs40_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
531 {
532 struct nfs4_slot *slot = res->sr_slot;
533 struct nfs4_slot_table *tbl;
534
535 if (!RPC_WAS_SENT(task))
536 goto out;
537
538 tbl = slot->table;
539 spin_lock(&tbl->slot_tbl_lock);
540 if (!nfs41_wake_and_assign_slot(tbl, slot))
541 nfs4_free_slot(tbl, slot);
542 spin_unlock(&tbl->slot_tbl_lock);
543
544 res->sr_slot = NULL;
545 out:
546 return 1;
547 }
548
549 #if defined(CONFIG_NFS_V4_1)
550
551 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
552 {
553 struct nfs4_session *session;
554 struct nfs4_slot_table *tbl;
555 bool send_new_highest_used_slotid = false;
556
557 if (!res->sr_slot) {
558 /* just wake up the next guy waiting since
559 * we may have not consumed a slot after all */
560 dprintk("%s: No slot\n", __func__);
561 return;
562 }
563 tbl = res->sr_slot->table;
564 session = tbl->session;
565
566 spin_lock(&tbl->slot_tbl_lock);
567 /* Be nice to the server: try to ensure that the last transmitted
568 * value for highest_user_slotid <= target_highest_slotid
569 */
570 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
571 send_new_highest_used_slotid = true;
572
573 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
574 send_new_highest_used_slotid = false;
575 goto out_unlock;
576 }
577 nfs4_free_slot(tbl, res->sr_slot);
578
579 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
580 send_new_highest_used_slotid = false;
581 out_unlock:
582 spin_unlock(&tbl->slot_tbl_lock);
583 res->sr_slot = NULL;
584 if (send_new_highest_used_slotid)
585 nfs41_server_notify_highest_slotid_update(session->clp);
586 }
587
588 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
589 {
590 struct nfs4_session *session;
591 struct nfs4_slot *slot;
592 struct nfs_client *clp;
593 bool interrupted = false;
594 int ret = 1;
595
596 /* don't increment the sequence number if the task wasn't sent */
597 if (!RPC_WAS_SENT(task))
598 goto out;
599
600 slot = res->sr_slot;
601 session = slot->table->session;
602
603 if (slot->interrupted) {
604 slot->interrupted = 0;
605 interrupted = true;
606 }
607
608 trace_nfs4_sequence_done(session, res);
609 /* Check the SEQUENCE operation status */
610 switch (res->sr_status) {
611 case 0:
612 /* Update the slot's sequence and clientid lease timer */
613 ++slot->seq_nr;
614 clp = session->clp;
615 do_renew_lease(clp, res->sr_timestamp);
616 /* Check sequence flags */
617 if (res->sr_status_flags != 0)
618 nfs4_schedule_lease_recovery(clp);
619 nfs41_update_target_slotid(slot->table, slot, res);
620 break;
621 case 1:
622 /*
623 * sr_status remains 1 if an RPC level error occurred.
624 * The server may or may not have processed the sequence
625 * operation..
626 * Mark the slot as having hosted an interrupted RPC call.
627 */
628 slot->interrupted = 1;
629 goto out;
630 case -NFS4ERR_DELAY:
631 /* The server detected a resend of the RPC call and
632 * returned NFS4ERR_DELAY as per Section 2.10.6.2
633 * of RFC5661.
634 */
635 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
636 __func__,
637 slot->slot_nr,
638 slot->seq_nr);
639 goto out_retry;
640 case -NFS4ERR_BADSLOT:
641 /*
642 * The slot id we used was probably retired. Try again
643 * using a different slot id.
644 */
645 goto retry_nowait;
646 case -NFS4ERR_SEQ_MISORDERED:
647 /*
648 * Was the last operation on this sequence interrupted?
649 * If so, retry after bumping the sequence number.
650 */
651 if (interrupted) {
652 ++slot->seq_nr;
653 goto retry_nowait;
654 }
655 /*
656 * Could this slot have been previously retired?
657 * If so, then the server may be expecting seq_nr = 1!
658 */
659 if (slot->seq_nr != 1) {
660 slot->seq_nr = 1;
661 goto retry_nowait;
662 }
663 break;
664 case -NFS4ERR_SEQ_FALSE_RETRY:
665 ++slot->seq_nr;
666 goto retry_nowait;
667 default:
668 /* Just update the slot sequence no. */
669 ++slot->seq_nr;
670 }
671 out:
672 /* The session may be reset by one of the error handlers. */
673 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
674 nfs41_sequence_free_slot(res);
675 return ret;
676 retry_nowait:
677 if (rpc_restart_call_prepare(task)) {
678 task->tk_status = 0;
679 ret = 0;
680 }
681 goto out;
682 out_retry:
683 if (!rpc_restart_call(task))
684 goto out;
685 rpc_delay(task, NFS4_POLL_RETRY_MAX);
686 return 0;
687 }
688
689 static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
691 {
692 if (res->sr_slot == NULL)
693 return 1;
694 if (!res->sr_slot->table->session)
695 return nfs40_sequence_done(task, res);
696 return nfs41_sequence_done(task, res);
697 }
698
699 int nfs41_setup_sequence(struct nfs4_session *session,
700 struct nfs4_sequence_args *args,
701 struct nfs4_sequence_res *res,
702 struct rpc_task *task)
703 {
704 struct nfs4_slot *slot;
705 struct nfs4_slot_table *tbl;
706
707 dprintk("--> %s\n", __func__);
708 /* slot already allocated? */
709 if (res->sr_slot != NULL)
710 goto out_success;
711
712 tbl = &session->fc_slot_table;
713
714 task->tk_timeout = 0;
715
716 spin_lock(&tbl->slot_tbl_lock);
717 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
718 !args->sa_privileged) {
719 /* The state manager will wait until the slot table is empty */
720 dprintk("%s session is draining\n", __func__);
721 goto out_sleep;
722 }
723
724 slot = nfs4_alloc_slot(tbl);
725 if (IS_ERR(slot)) {
726 /* If out of memory, try again in 1/4 second */
727 if (slot == ERR_PTR(-ENOMEM))
728 task->tk_timeout = HZ >> 2;
729 dprintk("<-- %s: no free slots\n", __func__);
730 goto out_sleep;
731 }
732 spin_unlock(&tbl->slot_tbl_lock);
733
734 args->sa_slot = slot;
735
736 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
737 slot->slot_nr, slot->seq_nr);
738
739 res->sr_slot = slot;
740 res->sr_timestamp = jiffies;
741 res->sr_status_flags = 0;
742 /*
743 * sr_status is only set in decode_sequence, and so will remain
744 * set to 1 if an rpc level failure occurs.
745 */
746 res->sr_status = 1;
747 trace_nfs4_setup_sequence(session, args);
748 out_success:
749 rpc_call_start(task);
750 return 0;
751 out_sleep:
752 /* Privileged tasks are queued with top priority */
753 if (args->sa_privileged)
754 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
755 NULL, RPC_PRIORITY_PRIVILEGED);
756 else
757 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
758 spin_unlock(&tbl->slot_tbl_lock);
759 return -EAGAIN;
760 }
761 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
762
763 static int nfs4_setup_sequence(const struct nfs_server *server,
764 struct nfs4_sequence_args *args,
765 struct nfs4_sequence_res *res,
766 struct rpc_task *task)
767 {
768 struct nfs4_session *session = nfs4_get_session(server);
769 int ret = 0;
770
771 if (!session)
772 return nfs40_setup_sequence(server, args, res, task);
773
774 dprintk("--> %s clp %p session %p sr_slot %u\n",
775 __func__, session->clp, session, res->sr_slot ?
776 res->sr_slot->slot_nr : NFS4_NO_SLOT);
777
778 ret = nfs41_setup_sequence(session, args, res, task);
779
780 dprintk("<-- %s status=%d\n", __func__, ret);
781 return ret;
782 }
783
784 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
785 {
786 struct nfs4_call_sync_data *data = calldata;
787 struct nfs4_session *session = nfs4_get_session(data->seq_server);
788
789 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
790
791 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
792 }
793
794 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
795 {
796 struct nfs4_call_sync_data *data = calldata;
797
798 nfs41_sequence_done(task, data->seq_res);
799 }
800
801 static const struct rpc_call_ops nfs41_call_sync_ops = {
802 .rpc_call_prepare = nfs41_call_sync_prepare,
803 .rpc_call_done = nfs41_call_sync_done,
804 };
805
806 #else /* !CONFIG_NFS_V4_1 */
807
808 static int nfs4_setup_sequence(const struct nfs_server *server,
809 struct nfs4_sequence_args *args,
810 struct nfs4_sequence_res *res,
811 struct rpc_task *task)
812 {
813 return nfs40_setup_sequence(server, args, res, task);
814 }
815
816 static int nfs4_sequence_done(struct rpc_task *task,
817 struct nfs4_sequence_res *res)
818 {
819 return nfs40_sequence_done(task, res);
820 }
821
822 #endif /* !CONFIG_NFS_V4_1 */
823
824 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
825 {
826 struct nfs4_call_sync_data *data = calldata;
827 nfs4_setup_sequence(data->seq_server,
828 data->seq_args, data->seq_res, task);
829 }
830
831 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
832 {
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_sequence_done(task, data->seq_res);
835 }
836
837 static const struct rpc_call_ops nfs40_call_sync_ops = {
838 .rpc_call_prepare = nfs40_call_sync_prepare,
839 .rpc_call_done = nfs40_call_sync_done,
840 };
841
842 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
843 struct nfs_server *server,
844 struct rpc_message *msg,
845 struct nfs4_sequence_args *args,
846 struct nfs4_sequence_res *res)
847 {
848 int ret;
849 struct rpc_task *task;
850 struct nfs_client *clp = server->nfs_client;
851 struct nfs4_call_sync_data data = {
852 .seq_server = server,
853 .seq_args = args,
854 .seq_res = res,
855 };
856 struct rpc_task_setup task_setup = {
857 .rpc_client = clnt,
858 .rpc_message = msg,
859 .callback_ops = clp->cl_mvops->call_sync_ops,
860 .callback_data = &data
861 };
862
863 task = rpc_run_task(&task_setup);
864 if (IS_ERR(task))
865 ret = PTR_ERR(task);
866 else {
867 ret = task->tk_status;
868 rpc_put_task(task);
869 }
870 return ret;
871 }
872
873 static
874 int nfs4_call_sync(struct rpc_clnt *clnt,
875 struct nfs_server *server,
876 struct rpc_message *msg,
877 struct nfs4_sequence_args *args,
878 struct nfs4_sequence_res *res,
879 int cache_reply)
880 {
881 nfs4_init_sequence(args, res, cache_reply);
882 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
883 }
884
885 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
886 {
887 struct nfs_inode *nfsi = NFS_I(dir);
888
889 spin_lock(&dir->i_lock);
890 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
891 if (!cinfo->atomic || cinfo->before != dir->i_version)
892 nfs_force_lookup_revalidate(dir);
893 dir->i_version = cinfo->after;
894 nfs_fscache_invalidate(dir);
895 spin_unlock(&dir->i_lock);
896 }
897
898 struct nfs4_opendata {
899 struct kref kref;
900 struct nfs_openargs o_arg;
901 struct nfs_openres o_res;
902 struct nfs_open_confirmargs c_arg;
903 struct nfs_open_confirmres c_res;
904 struct nfs4_string owner_name;
905 struct nfs4_string group_name;
906 struct nfs_fattr f_attr;
907 struct nfs4_label *f_label;
908 struct dentry *dir;
909 struct dentry *dentry;
910 struct nfs4_state_owner *owner;
911 struct nfs4_state *state;
912 struct iattr attrs;
913 unsigned long timestamp;
914 unsigned int rpc_done : 1;
915 unsigned int file_created : 1;
916 unsigned int is_recover : 1;
917 int rpc_status;
918 int cancelled;
919 };
920
921 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
922 int err, struct nfs4_exception *exception)
923 {
924 if (err != -EINVAL)
925 return false;
926 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
927 return false;
928 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
929 exception->retry = 1;
930 return true;
931 }
932
933 static enum open_claim_type4
934 nfs4_map_atomic_open_claim(struct nfs_server *server,
935 enum open_claim_type4 claim)
936 {
937 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
938 return claim;
939 switch (claim) {
940 default:
941 return claim;
942 case NFS4_OPEN_CLAIM_FH:
943 return NFS4_OPEN_CLAIM_NULL;
944 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
945 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
946 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
947 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
948 }
949 }
950
951 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
952 {
953 p->o_res.f_attr = &p->f_attr;
954 p->o_res.f_label = p->f_label;
955 p->o_res.seqid = p->o_arg.seqid;
956 p->c_res.seqid = p->c_arg.seqid;
957 p->o_res.server = p->o_arg.server;
958 p->o_res.access_request = p->o_arg.access;
959 nfs_fattr_init(&p->f_attr);
960 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
961 }
962
963 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
964 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
965 const struct iattr *attrs,
966 struct nfs4_label *label,
967 enum open_claim_type4 claim,
968 gfp_t gfp_mask)
969 {
970 struct dentry *parent = dget_parent(dentry);
971 struct inode *dir = parent->d_inode;
972 struct nfs_server *server = NFS_SERVER(dir);
973 struct nfs4_opendata *p;
974
975 p = kzalloc(sizeof(*p), gfp_mask);
976 if (p == NULL)
977 goto err;
978
979 p->f_label = nfs4_label_alloc(server, gfp_mask);
980 if (IS_ERR(p->f_label))
981 goto err_free_p;
982
983 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
984 if (p->o_arg.seqid == NULL)
985 goto err_free_label;
986 nfs_sb_active(dentry->d_sb);
987 p->dentry = dget(dentry);
988 p->dir = parent;
989 p->owner = sp;
990 atomic_inc(&sp->so_count);
991 p->o_arg.open_flags = flags;
992 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
993 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
994 * will return permission denied for all bits until close */
995 if (!(flags & O_EXCL)) {
996 /* ask server to check for all possible rights as results
997 * are cached */
998 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
999 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1000 }
1001 p->o_arg.clientid = server->nfs_client->cl_clientid;
1002 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1003 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1004 p->o_arg.name = &dentry->d_name;
1005 p->o_arg.server = server;
1006 p->o_arg.bitmask = nfs4_bitmask(server, label);
1007 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1008 p->o_arg.label = label;
1009 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1010 switch (p->o_arg.claim) {
1011 case NFS4_OPEN_CLAIM_NULL:
1012 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1013 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1014 p->o_arg.fh = NFS_FH(dir);
1015 break;
1016 case NFS4_OPEN_CLAIM_PREVIOUS:
1017 case NFS4_OPEN_CLAIM_FH:
1018 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1019 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1020 p->o_arg.fh = NFS_FH(dentry->d_inode);
1021 }
1022 if (attrs != NULL && attrs->ia_valid != 0) {
1023 __u32 verf[2];
1024
1025 p->o_arg.u.attrs = &p->attrs;
1026 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1027
1028 verf[0] = jiffies;
1029 verf[1] = current->pid;
1030 memcpy(p->o_arg.u.verifier.data, verf,
1031 sizeof(p->o_arg.u.verifier.data));
1032 }
1033 p->c_arg.fh = &p->o_res.fh;
1034 p->c_arg.stateid = &p->o_res.stateid;
1035 p->c_arg.seqid = p->o_arg.seqid;
1036 nfs4_init_opendata_res(p);
1037 kref_init(&p->kref);
1038 return p;
1039
1040 err_free_label:
1041 nfs4_label_free(p->f_label);
1042 err_free_p:
1043 kfree(p);
1044 err:
1045 dput(parent);
1046 return NULL;
1047 }
1048
1049 static void nfs4_opendata_free(struct kref *kref)
1050 {
1051 struct nfs4_opendata *p = container_of(kref,
1052 struct nfs4_opendata, kref);
1053 struct super_block *sb = p->dentry->d_sb;
1054
1055 nfs_free_seqid(p->o_arg.seqid);
1056 if (p->state != NULL)
1057 nfs4_put_open_state(p->state);
1058 nfs4_put_state_owner(p->owner);
1059
1060 nfs4_label_free(p->f_label);
1061
1062 dput(p->dir);
1063 dput(p->dentry);
1064 nfs_sb_deactive(sb);
1065 nfs_fattr_free_names(&p->f_attr);
1066 kfree(p);
1067 }
1068
1069 static void nfs4_opendata_put(struct nfs4_opendata *p)
1070 {
1071 if (p != NULL)
1072 kref_put(&p->kref, nfs4_opendata_free);
1073 }
1074
1075 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1076 {
1077 int ret;
1078
1079 ret = rpc_wait_for_completion_task(task);
1080 return ret;
1081 }
1082
1083 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1084 {
1085 int ret = 0;
1086
1087 if (open_mode & (O_EXCL|O_TRUNC))
1088 goto out;
1089 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1090 case FMODE_READ:
1091 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1092 && state->n_rdonly != 0;
1093 break;
1094 case FMODE_WRITE:
1095 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1096 && state->n_wronly != 0;
1097 break;
1098 case FMODE_READ|FMODE_WRITE:
1099 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1100 && state->n_rdwr != 0;
1101 }
1102 out:
1103 return ret;
1104 }
1105
1106 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1107 {
1108 if (delegation == NULL)
1109 return 0;
1110 if ((delegation->type & fmode) != fmode)
1111 return 0;
1112 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1113 return 0;
1114 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1115 return 0;
1116 nfs_mark_delegation_referenced(delegation);
1117 return 1;
1118 }
1119
1120 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1121 {
1122 switch (fmode) {
1123 case FMODE_WRITE:
1124 state->n_wronly++;
1125 break;
1126 case FMODE_READ:
1127 state->n_rdonly++;
1128 break;
1129 case FMODE_READ|FMODE_WRITE:
1130 state->n_rdwr++;
1131 }
1132 nfs4_state_set_mode_locked(state, state->state | fmode);
1133 }
1134
1135 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1136 {
1137 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1138 nfs4_stateid_copy(&state->stateid, stateid);
1139 nfs4_stateid_copy(&state->open_stateid, stateid);
1140 set_bit(NFS_OPEN_STATE, &state->flags);
1141 switch (fmode) {
1142 case FMODE_READ:
1143 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1144 break;
1145 case FMODE_WRITE:
1146 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1147 break;
1148 case FMODE_READ|FMODE_WRITE:
1149 set_bit(NFS_O_RDWR_STATE, &state->flags);
1150 }
1151 }
1152
1153 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1154 {
1155 write_seqlock(&state->seqlock);
1156 nfs_set_open_stateid_locked(state, stateid, fmode);
1157 write_sequnlock(&state->seqlock);
1158 }
1159
1160 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1161 {
1162 /*
1163 * Protect the call to nfs4_state_set_mode_locked and
1164 * serialise the stateid update
1165 */
1166 write_seqlock(&state->seqlock);
1167 if (deleg_stateid != NULL) {
1168 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1169 set_bit(NFS_DELEGATED_STATE, &state->flags);
1170 }
1171 if (open_stateid != NULL)
1172 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1173 write_sequnlock(&state->seqlock);
1174 spin_lock(&state->owner->so_lock);
1175 update_open_stateflags(state, fmode);
1176 spin_unlock(&state->owner->so_lock);
1177 }
1178
1179 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1180 {
1181 struct nfs_inode *nfsi = NFS_I(state->inode);
1182 struct nfs_delegation *deleg_cur;
1183 int ret = 0;
1184
1185 fmode &= (FMODE_READ|FMODE_WRITE);
1186
1187 rcu_read_lock();
1188 deleg_cur = rcu_dereference(nfsi->delegation);
1189 if (deleg_cur == NULL)
1190 goto no_delegation;
1191
1192 spin_lock(&deleg_cur->lock);
1193 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1194 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1195 (deleg_cur->type & fmode) != fmode)
1196 goto no_delegation_unlock;
1197
1198 if (delegation == NULL)
1199 delegation = &deleg_cur->stateid;
1200 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1201 goto no_delegation_unlock;
1202
1203 nfs_mark_delegation_referenced(deleg_cur);
1204 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1205 ret = 1;
1206 no_delegation_unlock:
1207 spin_unlock(&deleg_cur->lock);
1208 no_delegation:
1209 rcu_read_unlock();
1210
1211 if (!ret && open_stateid != NULL) {
1212 __update_open_stateid(state, open_stateid, NULL, fmode);
1213 ret = 1;
1214 }
1215
1216 return ret;
1217 }
1218
1219
1220 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1221 {
1222 struct nfs_delegation *delegation;
1223
1224 rcu_read_lock();
1225 delegation = rcu_dereference(NFS_I(inode)->delegation);
1226 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1227 rcu_read_unlock();
1228 return;
1229 }
1230 rcu_read_unlock();
1231 nfs4_inode_return_delegation(inode);
1232 }
1233
1234 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1235 {
1236 struct nfs4_state *state = opendata->state;
1237 struct nfs_inode *nfsi = NFS_I(state->inode);
1238 struct nfs_delegation *delegation;
1239 int open_mode = opendata->o_arg.open_flags;
1240 fmode_t fmode = opendata->o_arg.fmode;
1241 nfs4_stateid stateid;
1242 int ret = -EAGAIN;
1243
1244 for (;;) {
1245 if (can_open_cached(state, fmode, open_mode)) {
1246 spin_lock(&state->owner->so_lock);
1247 if (can_open_cached(state, fmode, open_mode)) {
1248 update_open_stateflags(state, fmode);
1249 spin_unlock(&state->owner->so_lock);
1250 goto out_return_state;
1251 }
1252 spin_unlock(&state->owner->so_lock);
1253 }
1254 rcu_read_lock();
1255 delegation = rcu_dereference(nfsi->delegation);
1256 if (!can_open_delegated(delegation, fmode)) {
1257 rcu_read_unlock();
1258 break;
1259 }
1260 /* Save the delegation */
1261 nfs4_stateid_copy(&stateid, &delegation->stateid);
1262 rcu_read_unlock();
1263 nfs_release_seqid(opendata->o_arg.seqid);
1264 if (!opendata->is_recover) {
1265 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1266 if (ret != 0)
1267 goto out;
1268 }
1269 ret = -EAGAIN;
1270
1271 /* Try to update the stateid using the delegation */
1272 if (update_open_stateid(state, NULL, &stateid, fmode))
1273 goto out_return_state;
1274 }
1275 out:
1276 return ERR_PTR(ret);
1277 out_return_state:
1278 atomic_inc(&state->count);
1279 return state;
1280 }
1281
1282 static void
1283 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1284 {
1285 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1286 struct nfs_delegation *delegation;
1287 int delegation_flags = 0;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1291 if (delegation)
1292 delegation_flags = delegation->flags;
1293 rcu_read_unlock();
1294 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1295 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1296 "returning a delegation for "
1297 "OPEN(CLAIM_DELEGATE_CUR)\n",
1298 clp->cl_hostname);
1299 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1300 nfs_inode_set_delegation(state->inode,
1301 data->owner->so_cred,
1302 &data->o_res);
1303 else
1304 nfs_inode_reclaim_delegation(state->inode,
1305 data->owner->so_cred,
1306 &data->o_res);
1307 }
1308
1309 /*
1310 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1311 * and update the nfs4_state.
1312 */
1313 static struct nfs4_state *
1314 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1315 {
1316 struct inode *inode = data->state->inode;
1317 struct nfs4_state *state = data->state;
1318 int ret;
1319
1320 if (!data->rpc_done) {
1321 if (data->rpc_status) {
1322 ret = data->rpc_status;
1323 goto err;
1324 }
1325 /* cached opens have already been processed */
1326 goto update;
1327 }
1328
1329 ret = nfs_refresh_inode(inode, &data->f_attr);
1330 if (ret)
1331 goto err;
1332
1333 if (data->o_res.delegation_type != 0)
1334 nfs4_opendata_check_deleg(data, state);
1335 update:
1336 update_open_stateid(state, &data->o_res.stateid, NULL,
1337 data->o_arg.fmode);
1338 atomic_inc(&state->count);
1339
1340 return state;
1341 err:
1342 return ERR_PTR(ret);
1343
1344 }
1345
1346 static struct nfs4_state *
1347 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1348 {
1349 struct inode *inode;
1350 struct nfs4_state *state = NULL;
1351 int ret;
1352
1353 if (!data->rpc_done) {
1354 state = nfs4_try_open_cached(data);
1355 goto out;
1356 }
1357
1358 ret = -EAGAIN;
1359 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1360 goto err;
1361 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1362 ret = PTR_ERR(inode);
1363 if (IS_ERR(inode))
1364 goto err;
1365 ret = -ENOMEM;
1366 state = nfs4_get_open_state(inode, data->owner);
1367 if (state == NULL)
1368 goto err_put_inode;
1369 if (data->o_res.delegation_type != 0)
1370 nfs4_opendata_check_deleg(data, state);
1371 update_open_stateid(state, &data->o_res.stateid, NULL,
1372 data->o_arg.fmode);
1373 iput(inode);
1374 out:
1375 nfs_release_seqid(data->o_arg.seqid);
1376 return state;
1377 err_put_inode:
1378 iput(inode);
1379 err:
1380 return ERR_PTR(ret);
1381 }
1382
1383 static struct nfs4_state *
1384 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1385 {
1386 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1387 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1388 return _nfs4_opendata_to_nfs4_state(data);
1389 }
1390
1391 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1392 {
1393 struct nfs_inode *nfsi = NFS_I(state->inode);
1394 struct nfs_open_context *ctx;
1395
1396 spin_lock(&state->inode->i_lock);
1397 list_for_each_entry(ctx, &nfsi->open_files, list) {
1398 if (ctx->state != state)
1399 continue;
1400 get_nfs_open_context(ctx);
1401 spin_unlock(&state->inode->i_lock);
1402 return ctx;
1403 }
1404 spin_unlock(&state->inode->i_lock);
1405 return ERR_PTR(-ENOENT);
1406 }
1407
1408 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1409 struct nfs4_state *state, enum open_claim_type4 claim)
1410 {
1411 struct nfs4_opendata *opendata;
1412
1413 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1414 NULL, NULL, claim, GFP_NOFS);
1415 if (opendata == NULL)
1416 return ERR_PTR(-ENOMEM);
1417 opendata->state = state;
1418 atomic_inc(&state->count);
1419 return opendata;
1420 }
1421
1422 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1423 {
1424 struct nfs4_state *newstate;
1425 int ret;
1426
1427 opendata->o_arg.open_flags = 0;
1428 opendata->o_arg.fmode = fmode;
1429 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1430 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1431 nfs4_init_opendata_res(opendata);
1432 ret = _nfs4_recover_proc_open(opendata);
1433 if (ret != 0)
1434 return ret;
1435 newstate = nfs4_opendata_to_nfs4_state(opendata);
1436 if (IS_ERR(newstate))
1437 return PTR_ERR(newstate);
1438 nfs4_close_state(newstate, fmode);
1439 *res = newstate;
1440 return 0;
1441 }
1442
1443 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1444 {
1445 struct nfs4_state *newstate;
1446 int ret;
1447
1448 /* memory barrier prior to reading state->n_* */
1449 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1450 clear_bit(NFS_OPEN_STATE, &state->flags);
1451 smp_rmb();
1452 if (state->n_rdwr != 0) {
1453 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1454 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1455 if (ret != 0)
1456 return ret;
1457 if (newstate != state)
1458 return -ESTALE;
1459 }
1460 if (state->n_wronly != 0) {
1461 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1462 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1463 if (ret != 0)
1464 return ret;
1465 if (newstate != state)
1466 return -ESTALE;
1467 }
1468 if (state->n_rdonly != 0) {
1469 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1470 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1471 if (ret != 0)
1472 return ret;
1473 if (newstate != state)
1474 return -ESTALE;
1475 }
1476 /*
1477 * We may have performed cached opens for all three recoveries.
1478 * Check if we need to update the current stateid.
1479 */
1480 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1481 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1482 write_seqlock(&state->seqlock);
1483 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1484 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1485 write_sequnlock(&state->seqlock);
1486 }
1487 return 0;
1488 }
1489
1490 /*
1491 * OPEN_RECLAIM:
1492 * reclaim state on the server after a reboot.
1493 */
1494 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1495 {
1496 struct nfs_delegation *delegation;
1497 struct nfs4_opendata *opendata;
1498 fmode_t delegation_type = 0;
1499 int status;
1500
1501 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1502 NFS4_OPEN_CLAIM_PREVIOUS);
1503 if (IS_ERR(opendata))
1504 return PTR_ERR(opendata);
1505 rcu_read_lock();
1506 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1507 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1508 delegation_type = delegation->type;
1509 rcu_read_unlock();
1510 opendata->o_arg.u.delegation_type = delegation_type;
1511 status = nfs4_open_recover(opendata, state);
1512 nfs4_opendata_put(opendata);
1513 return status;
1514 }
1515
1516 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1517 {
1518 struct nfs_server *server = NFS_SERVER(state->inode);
1519 struct nfs4_exception exception = { };
1520 int err;
1521 do {
1522 err = _nfs4_do_open_reclaim(ctx, state);
1523 trace_nfs4_open_reclaim(ctx, 0, err);
1524 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1525 continue;
1526 if (err != -NFS4ERR_DELAY)
1527 break;
1528 nfs4_handle_exception(server, err, &exception);
1529 } while (exception.retry);
1530 return err;
1531 }
1532
1533 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1534 {
1535 struct nfs_open_context *ctx;
1536 int ret;
1537
1538 ctx = nfs4_state_find_open_context(state);
1539 if (IS_ERR(ctx))
1540 return -EAGAIN;
1541 ret = nfs4_do_open_reclaim(ctx, state);
1542 put_nfs_open_context(ctx);
1543 return ret;
1544 }
1545
1546 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1547 {
1548 switch (err) {
1549 default:
1550 printk(KERN_ERR "NFS: %s: unhandled error "
1551 "%d.\n", __func__, err);
1552 case 0:
1553 case -ENOENT:
1554 case -ESTALE:
1555 break;
1556 case -NFS4ERR_BADSESSION:
1557 case -NFS4ERR_BADSLOT:
1558 case -NFS4ERR_BAD_HIGH_SLOT:
1559 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1560 case -NFS4ERR_DEADSESSION:
1561 set_bit(NFS_DELEGATED_STATE, &state->flags);
1562 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1563 return -EAGAIN;
1564 case -NFS4ERR_STALE_CLIENTID:
1565 case -NFS4ERR_STALE_STATEID:
1566 set_bit(NFS_DELEGATED_STATE, &state->flags);
1567 case -NFS4ERR_EXPIRED:
1568 /* Don't recall a delegation if it was lost */
1569 nfs4_schedule_lease_recovery(server->nfs_client);
1570 return -EAGAIN;
1571 case -NFS4ERR_DELEG_REVOKED:
1572 case -NFS4ERR_ADMIN_REVOKED:
1573 case -NFS4ERR_BAD_STATEID:
1574 case -NFS4ERR_OPENMODE:
1575 nfs_inode_find_state_and_recover(state->inode,
1576 stateid);
1577 nfs4_schedule_stateid_recovery(server, state);
1578 return 0;
1579 case -NFS4ERR_DELAY:
1580 case -NFS4ERR_GRACE:
1581 set_bit(NFS_DELEGATED_STATE, &state->flags);
1582 ssleep(1);
1583 return -EAGAIN;
1584 case -ENOMEM:
1585 case -NFS4ERR_DENIED:
1586 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1587 return 0;
1588 }
1589 return err;
1590 }
1591
1592 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1593 {
1594 struct nfs_server *server = NFS_SERVER(state->inode);
1595 struct nfs4_opendata *opendata;
1596 int err;
1597
1598 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1599 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1600 if (IS_ERR(opendata))
1601 return PTR_ERR(opendata);
1602 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1603 err = nfs4_open_recover(opendata, state);
1604 nfs4_opendata_put(opendata);
1605 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1606 }
1607
1608 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1609 {
1610 struct nfs4_opendata *data = calldata;
1611
1612 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1613 &data->o_res.seq_res, task);
1614 }
1615
1616 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1617 {
1618 struct nfs4_opendata *data = calldata;
1619
1620 nfs40_sequence_done(task, &data->o_res.seq_res);
1621
1622 data->rpc_status = task->tk_status;
1623 if (data->rpc_status == 0) {
1624 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1625 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1626 renew_lease(data->o_res.server, data->timestamp);
1627 data->rpc_done = 1;
1628 }
1629 }
1630
1631 static void nfs4_open_confirm_release(void *calldata)
1632 {
1633 struct nfs4_opendata *data = calldata;
1634 struct nfs4_state *state = NULL;
1635
1636 /* If this request hasn't been cancelled, do nothing */
1637 if (data->cancelled == 0)
1638 goto out_free;
1639 /* In case of error, no cleanup! */
1640 if (!data->rpc_done)
1641 goto out_free;
1642 state = nfs4_opendata_to_nfs4_state(data);
1643 if (!IS_ERR(state))
1644 nfs4_close_state(state, data->o_arg.fmode);
1645 out_free:
1646 nfs4_opendata_put(data);
1647 }
1648
1649 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1650 .rpc_call_prepare = nfs4_open_confirm_prepare,
1651 .rpc_call_done = nfs4_open_confirm_done,
1652 .rpc_release = nfs4_open_confirm_release,
1653 };
1654
1655 /*
1656 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1657 */
1658 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1659 {
1660 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1661 struct rpc_task *task;
1662 struct rpc_message msg = {
1663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1664 .rpc_argp = &data->c_arg,
1665 .rpc_resp = &data->c_res,
1666 .rpc_cred = data->owner->so_cred,
1667 };
1668 struct rpc_task_setup task_setup_data = {
1669 .rpc_client = server->client,
1670 .rpc_message = &msg,
1671 .callback_ops = &nfs4_open_confirm_ops,
1672 .callback_data = data,
1673 .workqueue = nfsiod_workqueue,
1674 .flags = RPC_TASK_ASYNC,
1675 };
1676 int status;
1677
1678 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
1679 kref_get(&data->kref);
1680 data->rpc_done = 0;
1681 data->rpc_status = 0;
1682 data->timestamp = jiffies;
1683 task = rpc_run_task(&task_setup_data);
1684 if (IS_ERR(task))
1685 return PTR_ERR(task);
1686 status = nfs4_wait_for_completion_rpc_task(task);
1687 if (status != 0) {
1688 data->cancelled = 1;
1689 smp_wmb();
1690 } else
1691 status = data->rpc_status;
1692 rpc_put_task(task);
1693 return status;
1694 }
1695
1696 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1697 {
1698 struct nfs4_opendata *data = calldata;
1699 struct nfs4_state_owner *sp = data->owner;
1700 struct nfs_client *clp = sp->so_server->nfs_client;
1701
1702 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1703 goto out_wait;
1704 /*
1705 * Check if we still need to send an OPEN call, or if we can use
1706 * a delegation instead.
1707 */
1708 if (data->state != NULL) {
1709 struct nfs_delegation *delegation;
1710
1711 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1712 goto out_no_action;
1713 rcu_read_lock();
1714 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1715 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1716 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1717 can_open_delegated(delegation, data->o_arg.fmode))
1718 goto unlock_no_action;
1719 rcu_read_unlock();
1720 }
1721 /* Update client id. */
1722 data->o_arg.clientid = clp->cl_clientid;
1723 switch (data->o_arg.claim) {
1724 case NFS4_OPEN_CLAIM_PREVIOUS:
1725 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1726 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1727 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1728 case NFS4_OPEN_CLAIM_FH:
1729 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1730 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1731 }
1732 data->timestamp = jiffies;
1733 if (nfs4_setup_sequence(data->o_arg.server,
1734 &data->o_arg.seq_args,
1735 &data->o_res.seq_res,
1736 task) != 0)
1737 nfs_release_seqid(data->o_arg.seqid);
1738
1739 /* Set the create mode (note dependency on the session type) */
1740 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1741 if (data->o_arg.open_flags & O_EXCL) {
1742 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1743 if (nfs4_has_persistent_session(clp))
1744 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1745 else if (clp->cl_mvops->minor_version > 0)
1746 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1747 }
1748 return;
1749 unlock_no_action:
1750 rcu_read_unlock();
1751 out_no_action:
1752 task->tk_action = NULL;
1753 out_wait:
1754 nfs4_sequence_done(task, &data->o_res.seq_res);
1755 }
1756
1757 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1758 {
1759 struct nfs4_opendata *data = calldata;
1760
1761 data->rpc_status = task->tk_status;
1762
1763 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1764 return;
1765
1766 if (task->tk_status == 0) {
1767 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1768 switch (data->o_res.f_attr->mode & S_IFMT) {
1769 case S_IFREG:
1770 break;
1771 case S_IFLNK:
1772 data->rpc_status = -ELOOP;
1773 break;
1774 case S_IFDIR:
1775 data->rpc_status = -EISDIR;
1776 break;
1777 default:
1778 data->rpc_status = -ENOTDIR;
1779 }
1780 }
1781 renew_lease(data->o_res.server, data->timestamp);
1782 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1783 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1784 }
1785 data->rpc_done = 1;
1786 }
1787
1788 static void nfs4_open_release(void *calldata)
1789 {
1790 struct nfs4_opendata *data = calldata;
1791 struct nfs4_state *state = NULL;
1792
1793 /* If this request hasn't been cancelled, do nothing */
1794 if (data->cancelled == 0)
1795 goto out_free;
1796 /* In case of error, no cleanup! */
1797 if (data->rpc_status != 0 || !data->rpc_done)
1798 goto out_free;
1799 /* In case we need an open_confirm, no cleanup! */
1800 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1801 goto out_free;
1802 state = nfs4_opendata_to_nfs4_state(data);
1803 if (!IS_ERR(state))
1804 nfs4_close_state(state, data->o_arg.fmode);
1805 out_free:
1806 nfs4_opendata_put(data);
1807 }
1808
1809 static const struct rpc_call_ops nfs4_open_ops = {
1810 .rpc_call_prepare = nfs4_open_prepare,
1811 .rpc_call_done = nfs4_open_done,
1812 .rpc_release = nfs4_open_release,
1813 };
1814
1815 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1816 {
1817 struct inode *dir = data->dir->d_inode;
1818 struct nfs_server *server = NFS_SERVER(dir);
1819 struct nfs_openargs *o_arg = &data->o_arg;
1820 struct nfs_openres *o_res = &data->o_res;
1821 struct rpc_task *task;
1822 struct rpc_message msg = {
1823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1824 .rpc_argp = o_arg,
1825 .rpc_resp = o_res,
1826 .rpc_cred = data->owner->so_cred,
1827 };
1828 struct rpc_task_setup task_setup_data = {
1829 .rpc_client = server->client,
1830 .rpc_message = &msg,
1831 .callback_ops = &nfs4_open_ops,
1832 .callback_data = data,
1833 .workqueue = nfsiod_workqueue,
1834 .flags = RPC_TASK_ASYNC,
1835 };
1836 int status;
1837
1838 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1839 kref_get(&data->kref);
1840 data->rpc_done = 0;
1841 data->rpc_status = 0;
1842 data->cancelled = 0;
1843 data->is_recover = 0;
1844 if (isrecover) {
1845 nfs4_set_sequence_privileged(&o_arg->seq_args);
1846 data->is_recover = 1;
1847 }
1848 task = rpc_run_task(&task_setup_data);
1849 if (IS_ERR(task))
1850 return PTR_ERR(task);
1851 status = nfs4_wait_for_completion_rpc_task(task);
1852 if (status != 0) {
1853 data->cancelled = 1;
1854 smp_wmb();
1855 } else
1856 status = data->rpc_status;
1857 rpc_put_task(task);
1858
1859 return status;
1860 }
1861
1862 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1863 {
1864 struct inode *dir = data->dir->d_inode;
1865 struct nfs_openres *o_res = &data->o_res;
1866 int status;
1867
1868 status = nfs4_run_open_task(data, 1);
1869 if (status != 0 || !data->rpc_done)
1870 return status;
1871
1872 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1873
1874 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1875 status = _nfs4_proc_open_confirm(data);
1876 if (status != 0)
1877 return status;
1878 }
1879
1880 return status;
1881 }
1882
1883 static int nfs4_opendata_access(struct rpc_cred *cred,
1884 struct nfs4_opendata *opendata,
1885 struct nfs4_state *state, fmode_t fmode,
1886 int openflags)
1887 {
1888 struct nfs_access_entry cache;
1889 u32 mask;
1890
1891 /* access call failed or for some reason the server doesn't
1892 * support any access modes -- defer access call until later */
1893 if (opendata->o_res.access_supported == 0)
1894 return 0;
1895
1896 mask = 0;
1897 /* don't check MAY_WRITE - a newly created file may not have
1898 * write mode bits, but POSIX allows the creating process to write.
1899 * use openflags to check for exec, because fmode won't
1900 * always have FMODE_EXEC set when file open for exec. */
1901 if (openflags & __FMODE_EXEC) {
1902 /* ONLY check for exec rights */
1903 mask = MAY_EXEC;
1904 } else if (fmode & FMODE_READ)
1905 mask = MAY_READ;
1906
1907 cache.cred = cred;
1908 cache.jiffies = jiffies;
1909 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1910 nfs_access_add_cache(state->inode, &cache);
1911
1912 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1913 return 0;
1914
1915 /* even though OPEN succeeded, access is denied. Close the file */
1916 nfs4_close_state(state, fmode);
1917 return -EACCES;
1918 }
1919
1920 /*
1921 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1922 */
1923 static int _nfs4_proc_open(struct nfs4_opendata *data)
1924 {
1925 struct inode *dir = data->dir->d_inode;
1926 struct nfs_server *server = NFS_SERVER(dir);
1927 struct nfs_openargs *o_arg = &data->o_arg;
1928 struct nfs_openres *o_res = &data->o_res;
1929 int status;
1930
1931 status = nfs4_run_open_task(data, 0);
1932 if (!data->rpc_done)
1933 return status;
1934 if (status != 0) {
1935 if (status == -NFS4ERR_BADNAME &&
1936 !(o_arg->open_flags & O_CREAT))
1937 return -ENOENT;
1938 return status;
1939 }
1940
1941 nfs_fattr_map_and_free_names(server, &data->f_attr);
1942
1943 if (o_arg->open_flags & O_CREAT) {
1944 update_changeattr(dir, &o_res->cinfo);
1945 if (o_arg->open_flags & O_EXCL)
1946 data->file_created = 1;
1947 else if (o_res->cinfo.before != o_res->cinfo.after)
1948 data->file_created = 1;
1949 }
1950 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1951 server->caps &= ~NFS_CAP_POSIX_LOCK;
1952 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1953 status = _nfs4_proc_open_confirm(data);
1954 if (status != 0)
1955 return status;
1956 }
1957 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1958 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
1959 return 0;
1960 }
1961
1962 static int nfs4_recover_expired_lease(struct nfs_server *server)
1963 {
1964 return nfs4_client_recover_expired_lease(server->nfs_client);
1965 }
1966
1967 /*
1968 * OPEN_EXPIRED:
1969 * reclaim state on the server after a network partition.
1970 * Assumes caller holds the appropriate lock
1971 */
1972 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1973 {
1974 struct nfs4_opendata *opendata;
1975 int ret;
1976
1977 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1978 NFS4_OPEN_CLAIM_FH);
1979 if (IS_ERR(opendata))
1980 return PTR_ERR(opendata);
1981 ret = nfs4_open_recover(opendata, state);
1982 if (ret == -ESTALE)
1983 d_drop(ctx->dentry);
1984 nfs4_opendata_put(opendata);
1985 return ret;
1986 }
1987
1988 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1989 {
1990 struct nfs_server *server = NFS_SERVER(state->inode);
1991 struct nfs4_exception exception = { };
1992 int err;
1993
1994 do {
1995 err = _nfs4_open_expired(ctx, state);
1996 trace_nfs4_open_expired(ctx, 0, err);
1997 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1998 continue;
1999 switch (err) {
2000 default:
2001 goto out;
2002 case -NFS4ERR_GRACE:
2003 case -NFS4ERR_DELAY:
2004 nfs4_handle_exception(server, err, &exception);
2005 err = 0;
2006 }
2007 } while (exception.retry);
2008 out:
2009 return err;
2010 }
2011
2012 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2013 {
2014 struct nfs_open_context *ctx;
2015 int ret;
2016
2017 ctx = nfs4_state_find_open_context(state);
2018 if (IS_ERR(ctx))
2019 return -EAGAIN;
2020 ret = nfs4_do_open_expired(ctx, state);
2021 put_nfs_open_context(ctx);
2022 return ret;
2023 }
2024
2025 #if defined(CONFIG_NFS_V4_1)
2026 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
2027 {
2028 struct nfs_server *server = NFS_SERVER(state->inode);
2029 nfs4_stateid *stateid = &state->stateid;
2030 struct nfs_delegation *delegation;
2031 struct rpc_cred *cred = NULL;
2032 int status = -NFS4ERR_BAD_STATEID;
2033
2034 /* If a state reset has been done, test_stateid is unneeded */
2035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2036 return;
2037
2038 /* Get the delegation credential for use by test/free_stateid */
2039 rcu_read_lock();
2040 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2041 if (delegation != NULL &&
2042 nfs4_stateid_match(&delegation->stateid, stateid)) {
2043 cred = get_rpccred(delegation->cred);
2044 rcu_read_unlock();
2045 status = nfs41_test_stateid(server, stateid, cred);
2046 trace_nfs4_test_delegation_stateid(state, NULL, status);
2047 } else
2048 rcu_read_unlock();
2049
2050 if (status != NFS_OK) {
2051 /* Free the stateid unless the server explicitly
2052 * informs us the stateid is unrecognized. */
2053 if (status != -NFS4ERR_BAD_STATEID)
2054 nfs41_free_stateid(server, stateid, cred);
2055 nfs_remove_bad_delegation(state->inode);
2056
2057 write_seqlock(&state->seqlock);
2058 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2059 write_sequnlock(&state->seqlock);
2060 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2061 }
2062
2063 if (cred != NULL)
2064 put_rpccred(cred);
2065 }
2066
2067 /**
2068 * nfs41_check_open_stateid - possibly free an open stateid
2069 *
2070 * @state: NFSv4 state for an inode
2071 *
2072 * Returns NFS_OK if recovery for this stateid is now finished.
2073 * Otherwise a negative NFS4ERR value is returned.
2074 */
2075 static int nfs41_check_open_stateid(struct nfs4_state *state)
2076 {
2077 struct nfs_server *server = NFS_SERVER(state->inode);
2078 nfs4_stateid *stateid = &state->open_stateid;
2079 struct rpc_cred *cred = state->owner->so_cred;
2080 int status;
2081
2082 /* If a state reset has been done, test_stateid is unneeded */
2083 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2084 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2085 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2086 return -NFS4ERR_BAD_STATEID;
2087
2088 status = nfs41_test_stateid(server, stateid, cred);
2089 trace_nfs4_test_open_stateid(state, NULL, status);
2090 if (status != NFS_OK) {
2091 /* Free the stateid unless the server explicitly
2092 * informs us the stateid is unrecognized. */
2093 if (status != -NFS4ERR_BAD_STATEID)
2094 nfs41_free_stateid(server, stateid, cred);
2095
2096 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2097 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2098 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2099 clear_bit(NFS_OPEN_STATE, &state->flags);
2100 }
2101 return status;
2102 }
2103
2104 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2105 {
2106 int status;
2107
2108 nfs41_clear_delegation_stateid(state);
2109 status = nfs41_check_open_stateid(state);
2110 if (status != NFS_OK)
2111 status = nfs4_open_expired(sp, state);
2112 return status;
2113 }
2114 #endif
2115
2116 /*
2117 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2118 * fields corresponding to attributes that were used to store the verifier.
2119 * Make sure we clobber those fields in the later setattr call
2120 */
2121 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2122 {
2123 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2124 !(sattr->ia_valid & ATTR_ATIME_SET))
2125 sattr->ia_valid |= ATTR_ATIME;
2126
2127 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2128 !(sattr->ia_valid & ATTR_MTIME_SET))
2129 sattr->ia_valid |= ATTR_MTIME;
2130 }
2131
2132 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2133 fmode_t fmode,
2134 int flags,
2135 struct nfs_open_context *ctx)
2136 {
2137 struct nfs4_state_owner *sp = opendata->owner;
2138 struct nfs_server *server = sp->so_server;
2139 struct dentry *dentry;
2140 struct nfs4_state *state;
2141 unsigned int seq;
2142 int ret;
2143
2144 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2145
2146 ret = _nfs4_proc_open(opendata);
2147 if (ret != 0)
2148 goto out;
2149
2150 state = nfs4_opendata_to_nfs4_state(opendata);
2151 ret = PTR_ERR(state);
2152 if (IS_ERR(state))
2153 goto out;
2154 if (server->caps & NFS_CAP_POSIX_LOCK)
2155 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2156
2157 dentry = opendata->dentry;
2158 if (dentry->d_inode == NULL) {
2159 /* FIXME: Is this d_drop() ever needed? */
2160 d_drop(dentry);
2161 dentry = d_add_unique(dentry, igrab(state->inode));
2162 if (dentry == NULL) {
2163 dentry = opendata->dentry;
2164 } else if (dentry != ctx->dentry) {
2165 dput(ctx->dentry);
2166 ctx->dentry = dget(dentry);
2167 }
2168 nfs_set_verifier(dentry,
2169 nfs_save_change_attribute(opendata->dir->d_inode));
2170 }
2171
2172 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2173 if (ret != 0)
2174 goto out;
2175
2176 ctx->state = state;
2177 if (dentry->d_inode == state->inode) {
2178 nfs_inode_attach_open_context(ctx);
2179 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2180 nfs4_schedule_stateid_recovery(server, state);
2181 }
2182 out:
2183 return ret;
2184 }
2185
2186 /*
2187 * Returns a referenced nfs4_state
2188 */
2189 static int _nfs4_do_open(struct inode *dir,
2190 struct nfs_open_context *ctx,
2191 int flags,
2192 struct iattr *sattr,
2193 struct nfs4_label *label,
2194 int *opened)
2195 {
2196 struct nfs4_state_owner *sp;
2197 struct nfs4_state *state = NULL;
2198 struct nfs_server *server = NFS_SERVER(dir);
2199 struct nfs4_opendata *opendata;
2200 struct dentry *dentry = ctx->dentry;
2201 struct rpc_cred *cred = ctx->cred;
2202 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2203 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2204 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2205 struct nfs4_label *olabel = NULL;
2206 int status;
2207
2208 /* Protect against reboot recovery conflicts */
2209 status = -ENOMEM;
2210 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2211 if (sp == NULL) {
2212 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2213 goto out_err;
2214 }
2215 status = nfs4_recover_expired_lease(server);
2216 if (status != 0)
2217 goto err_put_state_owner;
2218 if (dentry->d_inode != NULL)
2219 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2220 status = -ENOMEM;
2221 if (dentry->d_inode)
2222 claim = NFS4_OPEN_CLAIM_FH;
2223 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2224 label, claim, GFP_KERNEL);
2225 if (opendata == NULL)
2226 goto err_put_state_owner;
2227
2228 if (label) {
2229 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2230 if (IS_ERR(olabel)) {
2231 status = PTR_ERR(olabel);
2232 goto err_opendata_put;
2233 }
2234 }
2235
2236 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2237 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2238 if (!opendata->f_attr.mdsthreshold)
2239 goto err_free_label;
2240 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2241 }
2242 if (dentry->d_inode != NULL)
2243 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2244
2245 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2246 if (status != 0)
2247 goto err_free_label;
2248 state = ctx->state;
2249
2250 if ((opendata->o_arg.open_flags & O_EXCL) &&
2251 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2252 nfs4_exclusive_attrset(opendata, sattr);
2253
2254 nfs_fattr_init(opendata->o_res.f_attr);
2255 status = nfs4_do_setattr(state->inode, cred,
2256 opendata->o_res.f_attr, sattr,
2257 state, label, olabel);
2258 if (status == 0) {
2259 nfs_setattr_update_inode(state->inode, sattr);
2260 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2261 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2262 }
2263 }
2264 if (opendata->file_created)
2265 *opened |= FILE_CREATED;
2266
2267 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2268 *ctx_th = opendata->f_attr.mdsthreshold;
2269 else
2270 kfree(opendata->f_attr.mdsthreshold);
2271 opendata->f_attr.mdsthreshold = NULL;
2272
2273 nfs4_label_free(olabel);
2274
2275 nfs4_opendata_put(opendata);
2276 nfs4_put_state_owner(sp);
2277 return 0;
2278 err_free_label:
2279 nfs4_label_free(olabel);
2280 err_opendata_put:
2281 kfree(opendata->f_attr.mdsthreshold);
2282 nfs4_opendata_put(opendata);
2283 err_put_state_owner:
2284 nfs4_put_state_owner(sp);
2285 out_err:
2286 return status;
2287 }
2288
2289
2290 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2291 struct nfs_open_context *ctx,
2292 int flags,
2293 struct iattr *sattr,
2294 struct nfs4_label *label,
2295 int *opened)
2296 {
2297 struct nfs_server *server = NFS_SERVER(dir);
2298 struct nfs4_exception exception = { };
2299 struct nfs4_state *res;
2300 int status;
2301
2302 do {
2303 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2304 res = ctx->state;
2305 trace_nfs4_open_file(ctx, flags, status);
2306 if (status == 0)
2307 break;
2308 /* NOTE: BAD_SEQID means the server and client disagree about the
2309 * book-keeping w.r.t. state-changing operations
2310 * (OPEN/CLOSE/LOCK/LOCKU...)
2311 * It is actually a sign of a bug on the client or on the server.
2312 *
2313 * If we receive a BAD_SEQID error in the particular case of
2314 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2315 * have unhashed the old state_owner for us, and that we can
2316 * therefore safely retry using a new one. We should still warn
2317 * the user though...
2318 */
2319 if (status == -NFS4ERR_BAD_SEQID) {
2320 pr_warn_ratelimited("NFS: v4 server %s "
2321 " returned a bad sequence-id error!\n",
2322 NFS_SERVER(dir)->nfs_client->cl_hostname);
2323 exception.retry = 1;
2324 continue;
2325 }
2326 /*
2327 * BAD_STATEID on OPEN means that the server cancelled our
2328 * state before it received the OPEN_CONFIRM.
2329 * Recover by retrying the request as per the discussion
2330 * on Page 181 of RFC3530.
2331 */
2332 if (status == -NFS4ERR_BAD_STATEID) {
2333 exception.retry = 1;
2334 continue;
2335 }
2336 if (status == -EAGAIN) {
2337 /* We must have found a delegation */
2338 exception.retry = 1;
2339 continue;
2340 }
2341 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2342 continue;
2343 res = ERR_PTR(nfs4_handle_exception(server,
2344 status, &exception));
2345 } while (exception.retry);
2346 return res;
2347 }
2348
2349 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2350 struct nfs_fattr *fattr, struct iattr *sattr,
2351 struct nfs4_state *state, struct nfs4_label *ilabel,
2352 struct nfs4_label *olabel)
2353 {
2354 struct nfs_server *server = NFS_SERVER(inode);
2355 struct nfs_setattrargs arg = {
2356 .fh = NFS_FH(inode),
2357 .iap = sattr,
2358 .server = server,
2359 .bitmask = server->attr_bitmask,
2360 .label = ilabel,
2361 };
2362 struct nfs_setattrres res = {
2363 .fattr = fattr,
2364 .label = olabel,
2365 .server = server,
2366 };
2367 struct rpc_message msg = {
2368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2369 .rpc_argp = &arg,
2370 .rpc_resp = &res,
2371 .rpc_cred = cred,
2372 };
2373 unsigned long timestamp = jiffies;
2374 fmode_t fmode;
2375 bool truncate;
2376 int status;
2377
2378 arg.bitmask = nfs4_bitmask(server, ilabel);
2379 if (ilabel)
2380 arg.bitmask = nfs4_bitmask(server, olabel);
2381
2382 nfs_fattr_init(fattr);
2383
2384 /* Servers should only apply open mode checks for file size changes */
2385 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2386 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2387
2388 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2389 /* Use that stateid */
2390 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2391 struct nfs_lockowner lockowner = {
2392 .l_owner = current->files,
2393 .l_pid = current->tgid,
2394 };
2395 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2396 &lockowner);
2397 } else
2398 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2399
2400 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2401 if (status == 0 && state != NULL)
2402 renew_lease(server, timestamp);
2403 return status;
2404 }
2405
2406 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2407 struct nfs_fattr *fattr, struct iattr *sattr,
2408 struct nfs4_state *state, struct nfs4_label *ilabel,
2409 struct nfs4_label *olabel)
2410 {
2411 struct nfs_server *server = NFS_SERVER(inode);
2412 struct nfs4_exception exception = {
2413 .state = state,
2414 .inode = inode,
2415 };
2416 int err;
2417 do {
2418 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2419 trace_nfs4_setattr(inode, err);
2420 switch (err) {
2421 case -NFS4ERR_OPENMODE:
2422 if (!(sattr->ia_valid & ATTR_SIZE)) {
2423 pr_warn_once("NFSv4: server %s is incorrectly "
2424 "applying open mode checks to "
2425 "a SETATTR that is not "
2426 "changing file size.\n",
2427 server->nfs_client->cl_hostname);
2428 }
2429 if (state && !(state->state & FMODE_WRITE)) {
2430 err = -EBADF;
2431 if (sattr->ia_valid & ATTR_OPEN)
2432 err = -EACCES;
2433 goto out;
2434 }
2435 }
2436 err = nfs4_handle_exception(server, err, &exception);
2437 } while (exception.retry);
2438 out:
2439 return err;
2440 }
2441
2442 struct nfs4_closedata {
2443 struct inode *inode;
2444 struct nfs4_state *state;
2445 struct nfs_closeargs arg;
2446 struct nfs_closeres res;
2447 struct nfs_fattr fattr;
2448 unsigned long timestamp;
2449 bool roc;
2450 u32 roc_barrier;
2451 };
2452
2453 static void nfs4_free_closedata(void *data)
2454 {
2455 struct nfs4_closedata *calldata = data;
2456 struct nfs4_state_owner *sp = calldata->state->owner;
2457 struct super_block *sb = calldata->state->inode->i_sb;
2458
2459 if (calldata->roc)
2460 pnfs_roc_release(calldata->state->inode);
2461 nfs4_put_open_state(calldata->state);
2462 nfs_free_seqid(calldata->arg.seqid);
2463 nfs4_put_state_owner(sp);
2464 nfs_sb_deactive(sb);
2465 kfree(calldata);
2466 }
2467
2468 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2469 fmode_t fmode)
2470 {
2471 spin_lock(&state->owner->so_lock);
2472 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2473 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2474 case FMODE_WRITE:
2475 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2476 break;
2477 case FMODE_READ:
2478 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2479 break;
2480 case 0:
2481 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2482 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2483 clear_bit(NFS_OPEN_STATE, &state->flags);
2484 }
2485 spin_unlock(&state->owner->so_lock);
2486 }
2487
2488 static void nfs4_close_done(struct rpc_task *task, void *data)
2489 {
2490 struct nfs4_closedata *calldata = data;
2491 struct nfs4_state *state = calldata->state;
2492 struct nfs_server *server = NFS_SERVER(calldata->inode);
2493
2494 dprintk("%s: begin!\n", __func__);
2495 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2496 return;
2497 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2498 /* hmm. we are done with the inode, and in the process of freeing
2499 * the state_owner. we keep this around to process errors
2500 */
2501 switch (task->tk_status) {
2502 case 0:
2503 if (calldata->roc)
2504 pnfs_roc_set_barrier(state->inode,
2505 calldata->roc_barrier);
2506 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2507 renew_lease(server, calldata->timestamp);
2508 nfs4_close_clear_stateid_flags(state,
2509 calldata->arg.fmode);
2510 break;
2511 case -NFS4ERR_STALE_STATEID:
2512 case -NFS4ERR_OLD_STATEID:
2513 case -NFS4ERR_BAD_STATEID:
2514 case -NFS4ERR_EXPIRED:
2515 if (calldata->arg.fmode == 0)
2516 break;
2517 default:
2518 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2519 rpc_restart_call_prepare(task);
2520 }
2521 nfs_release_seqid(calldata->arg.seqid);
2522 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2523 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2524 }
2525
2526 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2527 {
2528 struct nfs4_closedata *calldata = data;
2529 struct nfs4_state *state = calldata->state;
2530 struct inode *inode = calldata->inode;
2531 int call_close = 0;
2532
2533 dprintk("%s: begin!\n", __func__);
2534 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2535 goto out_wait;
2536
2537 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2538 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2539 spin_lock(&state->owner->so_lock);
2540 /* Calculate the change in open mode */
2541 if (state->n_rdwr == 0) {
2542 if (state->n_rdonly == 0) {
2543 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2544 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2545 calldata->arg.fmode &= ~FMODE_READ;
2546 }
2547 if (state->n_wronly == 0) {
2548 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2549 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2550 calldata->arg.fmode &= ~FMODE_WRITE;
2551 }
2552 }
2553 if (!nfs4_valid_open_stateid(state))
2554 call_close = 0;
2555 spin_unlock(&state->owner->so_lock);
2556
2557 if (!call_close) {
2558 /* Note: exit _without_ calling nfs4_close_done */
2559 goto out_no_action;
2560 }
2561
2562 if (calldata->arg.fmode == 0) {
2563 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2564 if (calldata->roc &&
2565 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2566 nfs_release_seqid(calldata->arg.seqid);
2567 goto out_wait;
2568 }
2569 }
2570
2571 nfs_fattr_init(calldata->res.fattr);
2572 calldata->timestamp = jiffies;
2573 if (nfs4_setup_sequence(NFS_SERVER(inode),
2574 &calldata->arg.seq_args,
2575 &calldata->res.seq_res,
2576 task) != 0)
2577 nfs_release_seqid(calldata->arg.seqid);
2578 dprintk("%s: done!\n", __func__);
2579 return;
2580 out_no_action:
2581 task->tk_action = NULL;
2582 out_wait:
2583 nfs4_sequence_done(task, &calldata->res.seq_res);
2584 }
2585
2586 static const struct rpc_call_ops nfs4_close_ops = {
2587 .rpc_call_prepare = nfs4_close_prepare,
2588 .rpc_call_done = nfs4_close_done,
2589 .rpc_release = nfs4_free_closedata,
2590 };
2591
2592 /*
2593 * It is possible for data to be read/written from a mem-mapped file
2594 * after the sys_close call (which hits the vfs layer as a flush).
2595 * This means that we can't safely call nfsv4 close on a file until
2596 * the inode is cleared. This in turn means that we are not good
2597 * NFSv4 citizens - we do not indicate to the server to update the file's
2598 * share state even when we are done with one of the three share
2599 * stateid's in the inode.
2600 *
2601 * NOTE: Caller must be holding the sp->so_owner semaphore!
2602 */
2603 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2604 {
2605 struct nfs_server *server = NFS_SERVER(state->inode);
2606 struct nfs4_closedata *calldata;
2607 struct nfs4_state_owner *sp = state->owner;
2608 struct rpc_task *task;
2609 struct rpc_message msg = {
2610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2611 .rpc_cred = state->owner->so_cred,
2612 };
2613 struct rpc_task_setup task_setup_data = {
2614 .rpc_client = server->client,
2615 .rpc_message = &msg,
2616 .callback_ops = &nfs4_close_ops,
2617 .workqueue = nfsiod_workqueue,
2618 .flags = RPC_TASK_ASYNC,
2619 };
2620 int status = -ENOMEM;
2621
2622 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2623 &task_setup_data.rpc_client, &msg);
2624
2625 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2626 if (calldata == NULL)
2627 goto out;
2628 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2629 calldata->inode = state->inode;
2630 calldata->state = state;
2631 calldata->arg.fh = NFS_FH(state->inode);
2632 calldata->arg.stateid = &state->open_stateid;
2633 /* Serialization for the sequence id */
2634 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2635 if (calldata->arg.seqid == NULL)
2636 goto out_free_calldata;
2637 calldata->arg.fmode = 0;
2638 calldata->arg.bitmask = server->cache_consistency_bitmask;
2639 calldata->res.fattr = &calldata->fattr;
2640 calldata->res.seqid = calldata->arg.seqid;
2641 calldata->res.server = server;
2642 calldata->roc = pnfs_roc(state->inode);
2643 nfs_sb_active(calldata->inode->i_sb);
2644
2645 msg.rpc_argp = &calldata->arg;
2646 msg.rpc_resp = &calldata->res;
2647 task_setup_data.callback_data = calldata;
2648 task = rpc_run_task(&task_setup_data);
2649 if (IS_ERR(task))
2650 return PTR_ERR(task);
2651 status = 0;
2652 if (wait)
2653 status = rpc_wait_for_completion_task(task);
2654 rpc_put_task(task);
2655 return status;
2656 out_free_calldata:
2657 kfree(calldata);
2658 out:
2659 nfs4_put_open_state(state);
2660 nfs4_put_state_owner(sp);
2661 return status;
2662 }
2663
2664 static struct inode *
2665 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2666 int open_flags, struct iattr *attr, int *opened)
2667 {
2668 struct nfs4_state *state;
2669 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2670
2671 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2672
2673 /* Protect against concurrent sillydeletes */
2674 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2675
2676 nfs4_label_release_security(label);
2677
2678 if (IS_ERR(state))
2679 return ERR_CAST(state);
2680 return state->inode;
2681 }
2682
2683 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2684 {
2685 if (ctx->state == NULL)
2686 return;
2687 if (is_sync)
2688 nfs4_close_sync(ctx->state, ctx->mode);
2689 else
2690 nfs4_close_state(ctx->state, ctx->mode);
2691 }
2692
2693 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2694 {
2695 struct nfs4_server_caps_arg args = {
2696 .fhandle = fhandle,
2697 };
2698 struct nfs4_server_caps_res res = {};
2699 struct rpc_message msg = {
2700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2701 .rpc_argp = &args,
2702 .rpc_resp = &res,
2703 };
2704 int status;
2705
2706 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2707 if (status == 0) {
2708 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2709 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2710 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2711 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2712 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2713 NFS_CAP_CTIME|NFS_CAP_MTIME);
2714 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2715 server->caps |= NFS_CAP_ACLS;
2716 if (res.has_links != 0)
2717 server->caps |= NFS_CAP_HARDLINKS;
2718 if (res.has_symlinks != 0)
2719 server->caps |= NFS_CAP_SYMLINKS;
2720 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2721 server->caps |= NFS_CAP_FILEID;
2722 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2723 server->caps |= NFS_CAP_MODE;
2724 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2725 server->caps |= NFS_CAP_NLINK;
2726 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2727 server->caps |= NFS_CAP_OWNER;
2728 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2729 server->caps |= NFS_CAP_OWNER_GROUP;
2730 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2731 server->caps |= NFS_CAP_ATIME;
2732 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2733 server->caps |= NFS_CAP_CTIME;
2734 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2735 server->caps |= NFS_CAP_MTIME;
2736 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2737 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2738 server->caps |= NFS_CAP_SECURITY_LABEL;
2739 #endif
2740 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2741 sizeof(server->attr_bitmask));
2742
2743 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2744 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2745 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2746 }
2747 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2748 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2749 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2750 server->acl_bitmask = res.acl_bitmask;
2751 server->fh_expire_type = res.fh_expire_type;
2752 }
2753
2754 return status;
2755 }
2756
2757 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2758 {
2759 struct nfs4_exception exception = { };
2760 int err;
2761 do {
2762 err = nfs4_handle_exception(server,
2763 _nfs4_server_capabilities(server, fhandle),
2764 &exception);
2765 } while (exception.retry);
2766 return err;
2767 }
2768
2769 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2770 struct nfs_fsinfo *info)
2771 {
2772 u32 bitmask[3];
2773 struct nfs4_lookup_root_arg args = {
2774 .bitmask = bitmask,
2775 };
2776 struct nfs4_lookup_res res = {
2777 .server = server,
2778 .fattr = info->fattr,
2779 .fh = fhandle,
2780 };
2781 struct rpc_message msg = {
2782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2783 .rpc_argp = &args,
2784 .rpc_resp = &res,
2785 };
2786
2787 bitmask[0] = nfs4_fattr_bitmap[0];
2788 bitmask[1] = nfs4_fattr_bitmap[1];
2789 /*
2790 * Process the label in the upcoming getfattr
2791 */
2792 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2793
2794 nfs_fattr_init(info->fattr);
2795 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2796 }
2797
2798 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2799 struct nfs_fsinfo *info)
2800 {
2801 struct nfs4_exception exception = { };
2802 int err;
2803 do {
2804 err = _nfs4_lookup_root(server, fhandle, info);
2805 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2806 switch (err) {
2807 case 0:
2808 case -NFS4ERR_WRONGSEC:
2809 goto out;
2810 default:
2811 err = nfs4_handle_exception(server, err, &exception);
2812 }
2813 } while (exception.retry);
2814 out:
2815 return err;
2816 }
2817
2818 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2819 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2820 {
2821 struct rpc_auth_create_args auth_args = {
2822 .pseudoflavor = flavor,
2823 };
2824 struct rpc_auth *auth;
2825 int ret;
2826
2827 auth = rpcauth_create(&auth_args, server->client);
2828 if (IS_ERR(auth)) {
2829 ret = -EACCES;
2830 goto out;
2831 }
2832 ret = nfs4_lookup_root(server, fhandle, info);
2833 out:
2834 return ret;
2835 }
2836
2837 /*
2838 * Retry pseudoroot lookup with various security flavors. We do this when:
2839 *
2840 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2841 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2842 *
2843 * Returns zero on success, or a negative NFS4ERR value, or a
2844 * negative errno value.
2845 */
2846 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2847 struct nfs_fsinfo *info)
2848 {
2849 /* Per 3530bis 15.33.5 */
2850 static const rpc_authflavor_t flav_array[] = {
2851 RPC_AUTH_GSS_KRB5P,
2852 RPC_AUTH_GSS_KRB5I,
2853 RPC_AUTH_GSS_KRB5,
2854 RPC_AUTH_UNIX, /* courtesy */
2855 RPC_AUTH_NULL,
2856 };
2857 int status = -EPERM;
2858 size_t i;
2859
2860 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2861 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2862 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2863 continue;
2864 break;
2865 }
2866
2867 /*
2868 * -EACCESS could mean that the user doesn't have correct permissions
2869 * to access the mount. It could also mean that we tried to mount
2870 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2871 * existing mount programs don't handle -EACCES very well so it should
2872 * be mapped to -EPERM instead.
2873 */
2874 if (status == -EACCES)
2875 status = -EPERM;
2876 return status;
2877 }
2878
2879 static int nfs4_do_find_root_sec(struct nfs_server *server,
2880 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2881 {
2882 int mv = server->nfs_client->cl_minorversion;
2883 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2884 }
2885
2886 /**
2887 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2888 * @server: initialized nfs_server handle
2889 * @fhandle: we fill in the pseudo-fs root file handle
2890 * @info: we fill in an FSINFO struct
2891 * @auth_probe: probe the auth flavours
2892 *
2893 * Returns zero on success, or a negative errno.
2894 */
2895 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2896 struct nfs_fsinfo *info,
2897 bool auth_probe)
2898 {
2899 int status;
2900
2901 switch (auth_probe) {
2902 case false:
2903 status = nfs4_lookup_root(server, fhandle, info);
2904 if (status != -NFS4ERR_WRONGSEC)
2905 break;
2906 /* Did user force a 'sec=' mount option? */
2907 if (server->flags & NFS_MOUNT_SECFLAVOUR)
2908 break;
2909 default:
2910 status = nfs4_do_find_root_sec(server, fhandle, info);
2911 }
2912
2913 if (status == 0)
2914 status = nfs4_server_capabilities(server, fhandle);
2915 if (status == 0)
2916 status = nfs4_do_fsinfo(server, fhandle, info);
2917
2918 return nfs4_map_errors(status);
2919 }
2920
2921 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2922 struct nfs_fsinfo *info)
2923 {
2924 int error;
2925 struct nfs_fattr *fattr = info->fattr;
2926 struct nfs4_label *label = NULL;
2927
2928 error = nfs4_server_capabilities(server, mntfh);
2929 if (error < 0) {
2930 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2931 return error;
2932 }
2933
2934 label = nfs4_label_alloc(server, GFP_KERNEL);
2935 if (IS_ERR(label))
2936 return PTR_ERR(label);
2937
2938 error = nfs4_proc_getattr(server, mntfh, fattr, label);
2939 if (error < 0) {
2940 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2941 goto err_free_label;
2942 }
2943
2944 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2945 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2946 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2947
2948 err_free_label:
2949 nfs4_label_free(label);
2950
2951 return error;
2952 }
2953
2954 /*
2955 * Get locations and (maybe) other attributes of a referral.
2956 * Note that we'll actually follow the referral later when
2957 * we detect fsid mismatch in inode revalidation
2958 */
2959 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2960 const struct qstr *name, struct nfs_fattr *fattr,
2961 struct nfs_fh *fhandle)
2962 {
2963 int status = -ENOMEM;
2964 struct page *page = NULL;
2965 struct nfs4_fs_locations *locations = NULL;
2966
2967 page = alloc_page(GFP_KERNEL);
2968 if (page == NULL)
2969 goto out;
2970 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2971 if (locations == NULL)
2972 goto out;
2973
2974 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2975 if (status != 0)
2976 goto out;
2977 /* Make sure server returned a different fsid for the referral */
2978 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2979 dprintk("%s: server did not return a different fsid for"
2980 " a referral at %s\n", __func__, name->name);
2981 status = -EIO;
2982 goto out;
2983 }
2984 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2985 nfs_fixup_referral_attributes(&locations->fattr);
2986
2987 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2988 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2989 memset(fhandle, 0, sizeof(struct nfs_fh));
2990 out:
2991 if (page)
2992 __free_page(page);
2993 kfree(locations);
2994 return status;
2995 }
2996
2997 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2998 struct nfs_fattr *fattr, struct nfs4_label *label)
2999 {
3000 struct nfs4_getattr_arg args = {
3001 .fh = fhandle,
3002 .bitmask = server->attr_bitmask,
3003 };
3004 struct nfs4_getattr_res res = {
3005 .fattr = fattr,
3006 .label = label,
3007 .server = server,
3008 };
3009 struct rpc_message msg = {
3010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3011 .rpc_argp = &args,
3012 .rpc_resp = &res,
3013 };
3014
3015 args.bitmask = nfs4_bitmask(server, label);
3016
3017 nfs_fattr_init(fattr);
3018 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3019 }
3020
3021 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3022 struct nfs_fattr *fattr, struct nfs4_label *label)
3023 {
3024 struct nfs4_exception exception = { };
3025 int err;
3026 do {
3027 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3028 trace_nfs4_getattr(server, fhandle, fattr, err);
3029 err = nfs4_handle_exception(server, err,
3030 &exception);
3031 } while (exception.retry);
3032 return err;
3033 }
3034
3035 /*
3036 * The file is not closed if it is opened due to the a request to change
3037 * the size of the file. The open call will not be needed once the
3038 * VFS layer lookup-intents are implemented.
3039 *
3040 * Close is called when the inode is destroyed.
3041 * If we haven't opened the file for O_WRONLY, we
3042 * need to in the size_change case to obtain a stateid.
3043 *
3044 * Got race?
3045 * Because OPEN is always done by name in nfsv4, it is
3046 * possible that we opened a different file by the same
3047 * name. We can recognize this race condition, but we
3048 * can't do anything about it besides returning an error.
3049 *
3050 * This will be fixed with VFS changes (lookup-intent).
3051 */
3052 static int
3053 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3054 struct iattr *sattr)
3055 {
3056 struct inode *inode = dentry->d_inode;
3057 struct rpc_cred *cred = NULL;
3058 struct nfs4_state *state = NULL;
3059 struct nfs4_label *label = NULL;
3060 int status;
3061
3062 if (pnfs_ld_layoutret_on_setattr(inode))
3063 pnfs_commit_and_return_layout(inode);
3064
3065 nfs_fattr_init(fattr);
3066
3067 /* Deal with open(O_TRUNC) */
3068 if (sattr->ia_valid & ATTR_OPEN)
3069 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3070
3071 /* Optimization: if the end result is no change, don't RPC */
3072 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3073 return 0;
3074
3075 /* Search for an existing open(O_WRITE) file */
3076 if (sattr->ia_valid & ATTR_FILE) {
3077 struct nfs_open_context *ctx;
3078
3079 ctx = nfs_file_open_context(sattr->ia_file);
3080 if (ctx) {
3081 cred = ctx->cred;
3082 state = ctx->state;
3083 }
3084 }
3085
3086 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3087 if (IS_ERR(label))
3088 return PTR_ERR(label);
3089
3090 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3091 if (status == 0) {
3092 nfs_setattr_update_inode(inode, sattr);
3093 nfs_setsecurity(inode, fattr, label);
3094 }
3095 nfs4_label_free(label);
3096 return status;
3097 }
3098
3099 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3100 const struct qstr *name, struct nfs_fh *fhandle,
3101 struct nfs_fattr *fattr, struct nfs4_label *label)
3102 {
3103 struct nfs_server *server = NFS_SERVER(dir);
3104 int status;
3105 struct nfs4_lookup_arg args = {
3106 .bitmask = server->attr_bitmask,
3107 .dir_fh = NFS_FH(dir),
3108 .name = name,
3109 };
3110 struct nfs4_lookup_res res = {
3111 .server = server,
3112 .fattr = fattr,
3113 .label = label,
3114 .fh = fhandle,
3115 };
3116 struct rpc_message msg = {
3117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3118 .rpc_argp = &args,
3119 .rpc_resp = &res,
3120 };
3121
3122 args.bitmask = nfs4_bitmask(server, label);
3123
3124 nfs_fattr_init(fattr);
3125
3126 dprintk("NFS call lookup %s\n", name->name);
3127 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3128 dprintk("NFS reply lookup: %d\n", status);
3129 return status;
3130 }
3131
3132 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3133 {
3134 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3135 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3136 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3137 fattr->nlink = 2;
3138 }
3139
3140 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3141 struct qstr *name, struct nfs_fh *fhandle,
3142 struct nfs_fattr *fattr, struct nfs4_label *label)
3143 {
3144 struct nfs4_exception exception = { };
3145 struct rpc_clnt *client = *clnt;
3146 int err;
3147 do {
3148 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3149 trace_nfs4_lookup(dir, name, err);
3150 switch (err) {
3151 case -NFS4ERR_BADNAME:
3152 err = -ENOENT;
3153 goto out;
3154 case -NFS4ERR_MOVED:
3155 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3156 goto out;
3157 case -NFS4ERR_WRONGSEC:
3158 err = -EPERM;
3159 if (client != *clnt)
3160 goto out;
3161 /* No security negotiation if the user specified 'sec=' */
3162 if (NFS_SERVER(dir)->flags & NFS_MOUNT_SECFLAVOUR)
3163 goto out;
3164 client = nfs4_create_sec_client(client, dir, name);
3165 if (IS_ERR(client))
3166 return PTR_ERR(client);
3167
3168 exception.retry = 1;
3169 break;
3170 default:
3171 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3172 }
3173 } while (exception.retry);
3174
3175 out:
3176 if (err == 0)
3177 *clnt = client;
3178 else if (client != *clnt)
3179 rpc_shutdown_client(client);
3180
3181 return err;
3182 }
3183
3184 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3185 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3186 struct nfs4_label *label)
3187 {
3188 int status;
3189 struct rpc_clnt *client = NFS_CLIENT(dir);
3190
3191 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3192 if (client != NFS_CLIENT(dir)) {
3193 rpc_shutdown_client(client);
3194 nfs_fixup_secinfo_attributes(fattr);
3195 }
3196 return status;
3197 }
3198
3199 struct rpc_clnt *
3200 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3201 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3202 {
3203 struct rpc_clnt *client = NFS_CLIENT(dir);
3204 int status;
3205
3206 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3207 if (status < 0)
3208 return ERR_PTR(status);
3209 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3210 }
3211
3212 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3213 {
3214 struct nfs_server *server = NFS_SERVER(inode);
3215 struct nfs4_accessargs args = {
3216 .fh = NFS_FH(inode),
3217 .bitmask = server->cache_consistency_bitmask,
3218 };
3219 struct nfs4_accessres res = {
3220 .server = server,
3221 };
3222 struct rpc_message msg = {
3223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3224 .rpc_argp = &args,
3225 .rpc_resp = &res,
3226 .rpc_cred = entry->cred,
3227 };
3228 int mode = entry->mask;
3229 int status = 0;
3230
3231 /*
3232 * Determine which access bits we want to ask for...
3233 */
3234 if (mode & MAY_READ)
3235 args.access |= NFS4_ACCESS_READ;
3236 if (S_ISDIR(inode->i_mode)) {
3237 if (mode & MAY_WRITE)
3238 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3239 if (mode & MAY_EXEC)
3240 args.access |= NFS4_ACCESS_LOOKUP;
3241 } else {
3242 if (mode & MAY_WRITE)
3243 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3244 if (mode & MAY_EXEC)
3245 args.access |= NFS4_ACCESS_EXECUTE;
3246 }
3247
3248 res.fattr = nfs_alloc_fattr();
3249 if (res.fattr == NULL)
3250 return -ENOMEM;
3251
3252 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3253 if (!status) {
3254 nfs_access_set_mask(entry, res.access);
3255 nfs_refresh_inode(inode, res.fattr);
3256 }
3257 nfs_free_fattr(res.fattr);
3258 return status;
3259 }
3260
3261 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3262 {
3263 struct nfs4_exception exception = { };
3264 int err;
3265 do {
3266 err = _nfs4_proc_access(inode, entry);
3267 trace_nfs4_access(inode, err);
3268 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3269 &exception);
3270 } while (exception.retry);
3271 return err;
3272 }
3273
3274 /*
3275 * TODO: For the time being, we don't try to get any attributes
3276 * along with any of the zero-copy operations READ, READDIR,
3277 * READLINK, WRITE.
3278 *
3279 * In the case of the first three, we want to put the GETATTR
3280 * after the read-type operation -- this is because it is hard
3281 * to predict the length of a GETATTR response in v4, and thus
3282 * align the READ data correctly. This means that the GETATTR
3283 * may end up partially falling into the page cache, and we should
3284 * shift it into the 'tail' of the xdr_buf before processing.
3285 * To do this efficiently, we need to know the total length
3286 * of data received, which doesn't seem to be available outside
3287 * of the RPC layer.
3288 *
3289 * In the case of WRITE, we also want to put the GETATTR after
3290 * the operation -- in this case because we want to make sure
3291 * we get the post-operation mtime and size.
3292 *
3293 * Both of these changes to the XDR layer would in fact be quite
3294 * minor, but I decided to leave them for a subsequent patch.
3295 */
3296 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3297 unsigned int pgbase, unsigned int pglen)
3298 {
3299 struct nfs4_readlink args = {
3300 .fh = NFS_FH(inode),
3301 .pgbase = pgbase,
3302 .pglen = pglen,
3303 .pages = &page,
3304 };
3305 struct nfs4_readlink_res res;
3306 struct rpc_message msg = {
3307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3308 .rpc_argp = &args,
3309 .rpc_resp = &res,
3310 };
3311
3312 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3313 }
3314
3315 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3316 unsigned int pgbase, unsigned int pglen)
3317 {
3318 struct nfs4_exception exception = { };
3319 int err;
3320 do {
3321 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3322 trace_nfs4_readlink(inode, err);
3323 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3324 &exception);
3325 } while (exception.retry);
3326 return err;
3327 }
3328
3329 /*
3330 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3331 */
3332 static int
3333 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3334 int flags)
3335 {
3336 struct nfs4_label l, *ilabel = NULL;
3337 struct nfs_open_context *ctx;
3338 struct nfs4_state *state;
3339 int opened = 0;
3340 int status = 0;
3341
3342 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3343 if (IS_ERR(ctx))
3344 return PTR_ERR(ctx);
3345
3346 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3347
3348 sattr->ia_mode &= ~current_umask();
3349 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3350 if (IS_ERR(state)) {
3351 status = PTR_ERR(state);
3352 goto out;
3353 }
3354 out:
3355 nfs4_label_release_security(ilabel);
3356 put_nfs_open_context(ctx);
3357 return status;
3358 }
3359
3360 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3361 {
3362 struct nfs_server *server = NFS_SERVER(dir);
3363 struct nfs_removeargs args = {
3364 .fh = NFS_FH(dir),
3365 .name = *name,
3366 };
3367 struct nfs_removeres res = {
3368 .server = server,
3369 };
3370 struct rpc_message msg = {
3371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3372 .rpc_argp = &args,
3373 .rpc_resp = &res,
3374 };
3375 int status;
3376
3377 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3378 if (status == 0)
3379 update_changeattr(dir, &res.cinfo);
3380 return status;
3381 }
3382
3383 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3384 {
3385 struct nfs4_exception exception = { };
3386 int err;
3387 do {
3388 err = _nfs4_proc_remove(dir, name);
3389 trace_nfs4_remove(dir, name, err);
3390 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3391 &exception);
3392 } while (exception.retry);
3393 return err;
3394 }
3395
3396 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3397 {
3398 struct nfs_server *server = NFS_SERVER(dir);
3399 struct nfs_removeargs *args = msg->rpc_argp;
3400 struct nfs_removeres *res = msg->rpc_resp;
3401
3402 res->server = server;
3403 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3404 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3405
3406 nfs_fattr_init(res->dir_attr);
3407 }
3408
3409 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3410 {
3411 nfs4_setup_sequence(NFS_SERVER(data->dir),
3412 &data->args.seq_args,
3413 &data->res.seq_res,
3414 task);
3415 }
3416
3417 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3418 {
3419 struct nfs_unlinkdata *data = task->tk_calldata;
3420 struct nfs_removeres *res = &data->res;
3421
3422 if (!nfs4_sequence_done(task, &res->seq_res))
3423 return 0;
3424 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3425 return 0;
3426 update_changeattr(dir, &res->cinfo);
3427 return 1;
3428 }
3429
3430 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3431 {
3432 struct nfs_server *server = NFS_SERVER(dir);
3433 struct nfs_renameargs *arg = msg->rpc_argp;
3434 struct nfs_renameres *res = msg->rpc_resp;
3435
3436 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3437 res->server = server;
3438 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3439 }
3440
3441 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3442 {
3443 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3444 &data->args.seq_args,
3445 &data->res.seq_res,
3446 task);
3447 }
3448
3449 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3450 struct inode *new_dir)
3451 {
3452 struct nfs_renamedata *data = task->tk_calldata;
3453 struct nfs_renameres *res = &data->res;
3454
3455 if (!nfs4_sequence_done(task, &res->seq_res))
3456 return 0;
3457 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3458 return 0;
3459
3460 update_changeattr(old_dir, &res->old_cinfo);
3461 update_changeattr(new_dir, &res->new_cinfo);
3462 return 1;
3463 }
3464
3465 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3466 struct inode *new_dir, struct qstr *new_name)
3467 {
3468 struct nfs_server *server = NFS_SERVER(old_dir);
3469 struct nfs_renameargs arg = {
3470 .old_dir = NFS_FH(old_dir),
3471 .new_dir = NFS_FH(new_dir),
3472 .old_name = old_name,
3473 .new_name = new_name,
3474 };
3475 struct nfs_renameres res = {
3476 .server = server,
3477 };
3478 struct rpc_message msg = {
3479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3480 .rpc_argp = &arg,
3481 .rpc_resp = &res,
3482 };
3483 int status = -ENOMEM;
3484
3485 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3486 if (!status) {
3487 update_changeattr(old_dir, &res.old_cinfo);
3488 update_changeattr(new_dir, &res.new_cinfo);
3489 }
3490 return status;
3491 }
3492
3493 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3494 struct inode *new_dir, struct qstr *new_name)
3495 {
3496 struct nfs4_exception exception = { };
3497 int err;
3498 do {
3499 err = _nfs4_proc_rename(old_dir, old_name,
3500 new_dir, new_name);
3501 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3502 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
3503 &exception);
3504 } while (exception.retry);
3505 return err;
3506 }
3507
3508 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3509 {
3510 struct nfs_server *server = NFS_SERVER(inode);
3511 struct nfs4_link_arg arg = {
3512 .fh = NFS_FH(inode),
3513 .dir_fh = NFS_FH(dir),
3514 .name = name,
3515 .bitmask = server->attr_bitmask,
3516 };
3517 struct nfs4_link_res res = {
3518 .server = server,
3519 .label = NULL,
3520 };
3521 struct rpc_message msg = {
3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3523 .rpc_argp = &arg,
3524 .rpc_resp = &res,
3525 };
3526 int status = -ENOMEM;
3527
3528 res.fattr = nfs_alloc_fattr();
3529 if (res.fattr == NULL)
3530 goto out;
3531
3532 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3533 if (IS_ERR(res.label)) {
3534 status = PTR_ERR(res.label);
3535 goto out;
3536 }
3537 arg.bitmask = nfs4_bitmask(server, res.label);
3538
3539 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3540 if (!status) {
3541 update_changeattr(dir, &res.cinfo);
3542 status = nfs_post_op_update_inode(inode, res.fattr);
3543 if (!status)
3544 nfs_setsecurity(inode, res.fattr, res.label);
3545 }
3546
3547
3548 nfs4_label_free(res.label);
3549
3550 out:
3551 nfs_free_fattr(res.fattr);
3552 return status;
3553 }
3554
3555 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3556 {
3557 struct nfs4_exception exception = { };
3558 int err;
3559 do {
3560 err = nfs4_handle_exception(NFS_SERVER(inode),
3561 _nfs4_proc_link(inode, dir, name),
3562 &exception);
3563 } while (exception.retry);
3564 return err;
3565 }
3566
3567 struct nfs4_createdata {
3568 struct rpc_message msg;
3569 struct nfs4_create_arg arg;
3570 struct nfs4_create_res res;
3571 struct nfs_fh fh;
3572 struct nfs_fattr fattr;
3573 struct nfs4_label *label;
3574 };
3575
3576 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3577 struct qstr *name, struct iattr *sattr, u32 ftype)
3578 {
3579 struct nfs4_createdata *data;
3580
3581 data = kzalloc(sizeof(*data), GFP_KERNEL);
3582 if (data != NULL) {
3583 struct nfs_server *server = NFS_SERVER(dir);
3584
3585 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3586 if (IS_ERR(data->label))
3587 goto out_free;
3588
3589 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3590 data->msg.rpc_argp = &data->arg;
3591 data->msg.rpc_resp = &data->res;
3592 data->arg.dir_fh = NFS_FH(dir);
3593 data->arg.server = server;
3594 data->arg.name = name;
3595 data->arg.attrs = sattr;
3596 data->arg.ftype = ftype;
3597 data->arg.bitmask = nfs4_bitmask(server, data->label);
3598 data->res.server = server;
3599 data->res.fh = &data->fh;
3600 data->res.fattr = &data->fattr;
3601 data->res.label = data->label;
3602 nfs_fattr_init(data->res.fattr);
3603 }
3604 return data;
3605 out_free:
3606 kfree(data);
3607 return NULL;
3608 }
3609
3610 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3611 {
3612 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3613 &data->arg.seq_args, &data->res.seq_res, 1);
3614 if (status == 0) {
3615 update_changeattr(dir, &data->res.dir_cinfo);
3616 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3617 }
3618 return status;
3619 }
3620
3621 static void nfs4_free_createdata(struct nfs4_createdata *data)
3622 {
3623 nfs4_label_free(data->label);
3624 kfree(data);
3625 }
3626
3627 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3628 struct page *page, unsigned int len, struct iattr *sattr,
3629 struct nfs4_label *label)
3630 {
3631 struct nfs4_createdata *data;
3632 int status = -ENAMETOOLONG;
3633
3634 if (len > NFS4_MAXPATHLEN)
3635 goto out;
3636
3637 status = -ENOMEM;
3638 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3639 if (data == NULL)
3640 goto out;
3641
3642 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3643 data->arg.u.symlink.pages = &page;
3644 data->arg.u.symlink.len = len;
3645 data->arg.label = label;
3646
3647 status = nfs4_do_create(dir, dentry, data);
3648
3649 nfs4_free_createdata(data);
3650 out:
3651 return status;
3652 }
3653
3654 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3655 struct page *page, unsigned int len, struct iattr *sattr)
3656 {
3657 struct nfs4_exception exception = { };
3658 struct nfs4_label l, *label = NULL;
3659 int err;
3660
3661 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3662
3663 do {
3664 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3665 trace_nfs4_symlink(dir, &dentry->d_name, err);
3666 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3667 &exception);
3668 } while (exception.retry);
3669
3670 nfs4_label_release_security(label);
3671 return err;
3672 }
3673
3674 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3675 struct iattr *sattr, struct nfs4_label *label)
3676 {
3677 struct nfs4_createdata *data;
3678 int status = -ENOMEM;
3679
3680 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3681 if (data == NULL)
3682 goto out;
3683
3684 data->arg.label = label;
3685 status = nfs4_do_create(dir, dentry, data);
3686
3687 nfs4_free_createdata(data);
3688 out:
3689 return status;
3690 }
3691
3692 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3693 struct iattr *sattr)
3694 {
3695 struct nfs4_exception exception = { };
3696 struct nfs4_label l, *label = NULL;
3697 int err;
3698
3699 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3700
3701 sattr->ia_mode &= ~current_umask();
3702 do {
3703 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3704 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3705 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3706 &exception);
3707 } while (exception.retry);
3708 nfs4_label_release_security(label);
3709
3710 return err;
3711 }
3712
3713 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3714 u64 cookie, struct page **pages, unsigned int count, int plus)
3715 {
3716 struct inode *dir = dentry->d_inode;
3717 struct nfs4_readdir_arg args = {
3718 .fh = NFS_FH(dir),
3719 .pages = pages,
3720 .pgbase = 0,
3721 .count = count,
3722 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3723 .plus = plus,
3724 };
3725 struct nfs4_readdir_res res;
3726 struct rpc_message msg = {
3727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3728 .rpc_argp = &args,
3729 .rpc_resp = &res,
3730 .rpc_cred = cred,
3731 };
3732 int status;
3733
3734 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3735 dentry->d_parent->d_name.name,
3736 dentry->d_name.name,
3737 (unsigned long long)cookie);
3738 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3739 res.pgbase = args.pgbase;
3740 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3741 if (status >= 0) {
3742 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3743 status += args.pgbase;
3744 }
3745
3746 nfs_invalidate_atime(dir);
3747
3748 dprintk("%s: returns %d\n", __func__, status);
3749 return status;
3750 }
3751
3752 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3753 u64 cookie, struct page **pages, unsigned int count, int plus)
3754 {
3755 struct nfs4_exception exception = { };
3756 int err;
3757 do {
3758 err = _nfs4_proc_readdir(dentry, cred, cookie,
3759 pages, count, plus);
3760 trace_nfs4_readdir(dentry->d_inode, err);
3761 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3762 &exception);
3763 } while (exception.retry);
3764 return err;
3765 }
3766
3767 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3768 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3769 {
3770 struct nfs4_createdata *data;
3771 int mode = sattr->ia_mode;
3772 int status = -ENOMEM;
3773
3774 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3775 if (data == NULL)
3776 goto out;
3777
3778 if (S_ISFIFO(mode))
3779 data->arg.ftype = NF4FIFO;
3780 else if (S_ISBLK(mode)) {
3781 data->arg.ftype = NF4BLK;
3782 data->arg.u.device.specdata1 = MAJOR(rdev);
3783 data->arg.u.device.specdata2 = MINOR(rdev);
3784 }
3785 else if (S_ISCHR(mode)) {
3786 data->arg.ftype = NF4CHR;
3787 data->arg.u.device.specdata1 = MAJOR(rdev);
3788 data->arg.u.device.specdata2 = MINOR(rdev);
3789 } else if (!S_ISSOCK(mode)) {
3790 status = -EINVAL;
3791 goto out_free;
3792 }
3793
3794 data->arg.label = label;
3795 status = nfs4_do_create(dir, dentry, data);
3796 out_free:
3797 nfs4_free_createdata(data);
3798 out:
3799 return status;
3800 }
3801
3802 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3803 struct iattr *sattr, dev_t rdev)
3804 {
3805 struct nfs4_exception exception = { };
3806 struct nfs4_label l, *label = NULL;
3807 int err;
3808
3809 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3810
3811 sattr->ia_mode &= ~current_umask();
3812 do {
3813 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3814 trace_nfs4_mknod(dir, &dentry->d_name, err);
3815 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3816 &exception);
3817 } while (exception.retry);
3818
3819 nfs4_label_release_security(label);
3820
3821 return err;
3822 }
3823
3824 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3825 struct nfs_fsstat *fsstat)
3826 {
3827 struct nfs4_statfs_arg args = {
3828 .fh = fhandle,
3829 .bitmask = server->attr_bitmask,
3830 };
3831 struct nfs4_statfs_res res = {
3832 .fsstat = fsstat,
3833 };
3834 struct rpc_message msg = {
3835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3836 .rpc_argp = &args,
3837 .rpc_resp = &res,
3838 };
3839
3840 nfs_fattr_init(fsstat->fattr);
3841 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3842 }
3843
3844 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3845 {
3846 struct nfs4_exception exception = { };
3847 int err;
3848 do {
3849 err = nfs4_handle_exception(server,
3850 _nfs4_proc_statfs(server, fhandle, fsstat),
3851 &exception);
3852 } while (exception.retry);
3853 return err;
3854 }
3855
3856 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3857 struct nfs_fsinfo *fsinfo)
3858 {
3859 struct nfs4_fsinfo_arg args = {
3860 .fh = fhandle,
3861 .bitmask = server->attr_bitmask,
3862 };
3863 struct nfs4_fsinfo_res res = {
3864 .fsinfo = fsinfo,
3865 };
3866 struct rpc_message msg = {
3867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3868 .rpc_argp = &args,
3869 .rpc_resp = &res,
3870 };
3871
3872 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3873 }
3874
3875 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3876 {
3877 struct nfs4_exception exception = { };
3878 unsigned long now = jiffies;
3879 int err;
3880
3881 do {
3882 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3883 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
3884 if (err == 0) {
3885 struct nfs_client *clp = server->nfs_client;
3886
3887 spin_lock(&clp->cl_lock);
3888 clp->cl_lease_time = fsinfo->lease_time * HZ;
3889 clp->cl_last_renewal = now;
3890 spin_unlock(&clp->cl_lock);
3891 break;
3892 }
3893 err = nfs4_handle_exception(server, err, &exception);
3894 } while (exception.retry);
3895 return err;
3896 }
3897
3898 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3899 {
3900 int error;
3901
3902 nfs_fattr_init(fsinfo->fattr);
3903 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3904 if (error == 0) {
3905 /* block layout checks this! */
3906 server->pnfs_blksize = fsinfo->blksize;
3907 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3908 }
3909
3910 return error;
3911 }
3912
3913 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3914 struct nfs_pathconf *pathconf)
3915 {
3916 struct nfs4_pathconf_arg args = {
3917 .fh = fhandle,
3918 .bitmask = server->attr_bitmask,
3919 };
3920 struct nfs4_pathconf_res res = {
3921 .pathconf = pathconf,
3922 };
3923 struct rpc_message msg = {
3924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3925 .rpc_argp = &args,
3926 .rpc_resp = &res,
3927 };
3928
3929 /* None of the pathconf attributes are mandatory to implement */
3930 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3931 memset(pathconf, 0, sizeof(*pathconf));
3932 return 0;
3933 }
3934
3935 nfs_fattr_init(pathconf->fattr);
3936 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3937 }
3938
3939 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3940 struct nfs_pathconf *pathconf)
3941 {
3942 struct nfs4_exception exception = { };
3943 int err;
3944
3945 do {
3946 err = nfs4_handle_exception(server,
3947 _nfs4_proc_pathconf(server, fhandle, pathconf),
3948 &exception);
3949 } while (exception.retry);
3950 return err;
3951 }
3952
3953 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3954 const struct nfs_open_context *ctx,
3955 const struct nfs_lock_context *l_ctx,
3956 fmode_t fmode)
3957 {
3958 const struct nfs_lockowner *lockowner = NULL;
3959
3960 if (l_ctx != NULL)
3961 lockowner = &l_ctx->lockowner;
3962 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3963 }
3964 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3965
3966 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3967 const struct nfs_open_context *ctx,
3968 const struct nfs_lock_context *l_ctx,
3969 fmode_t fmode)
3970 {
3971 nfs4_stateid current_stateid;
3972
3973 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3974 return false;
3975 return nfs4_stateid_match(stateid, &current_stateid);
3976 }
3977
3978 static bool nfs4_error_stateid_expired(int err)
3979 {
3980 switch (err) {
3981 case -NFS4ERR_DELEG_REVOKED:
3982 case -NFS4ERR_ADMIN_REVOKED:
3983 case -NFS4ERR_BAD_STATEID:
3984 case -NFS4ERR_STALE_STATEID:
3985 case -NFS4ERR_OLD_STATEID:
3986 case -NFS4ERR_OPENMODE:
3987 case -NFS4ERR_EXPIRED:
3988 return true;
3989 }
3990 return false;
3991 }
3992
3993 void __nfs4_read_done_cb(struct nfs_read_data *data)
3994 {
3995 nfs_invalidate_atime(data->header->inode);
3996 }
3997
3998 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3999 {
4000 struct nfs_server *server = NFS_SERVER(data->header->inode);
4001
4002 trace_nfs4_read(data, task->tk_status);
4003 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
4004 rpc_restart_call_prepare(task);
4005 return -EAGAIN;
4006 }
4007
4008 __nfs4_read_done_cb(data);
4009 if (task->tk_status > 0)
4010 renew_lease(server, data->timestamp);
4011 return 0;
4012 }
4013
4014 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4015 struct nfs_readargs *args)
4016 {
4017
4018 if (!nfs4_error_stateid_expired(task->tk_status) ||
4019 nfs4_stateid_is_current(&args->stateid,
4020 args->context,
4021 args->lock_context,
4022 FMODE_READ))
4023 return false;
4024 rpc_restart_call_prepare(task);
4025 return true;
4026 }
4027
4028 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4029 {
4030
4031 dprintk("--> %s\n", __func__);
4032
4033 if (!nfs4_sequence_done(task, &data->res.seq_res))
4034 return -EAGAIN;
4035 if (nfs4_read_stateid_changed(task, &data->args))
4036 return -EAGAIN;
4037 return data->read_done_cb ? data->read_done_cb(task, data) :
4038 nfs4_read_done_cb(task, data);
4039 }
4040
4041 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
4042 {
4043 data->timestamp = jiffies;
4044 data->read_done_cb = nfs4_read_done_cb;
4045 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4046 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
4047 }
4048
4049 static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
4050 {
4051 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
4052 &data->args.seq_args,
4053 &data->res.seq_res,
4054 task))
4055 return 0;
4056 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4057 data->args.lock_context, FMODE_READ) == -EIO)
4058 return -EIO;
4059 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4060 return -EIO;
4061 return 0;
4062 }
4063
4064 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
4065 {
4066 struct inode *inode = data->header->inode;
4067
4068 trace_nfs4_write(data, task->tk_status);
4069 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
4070 rpc_restart_call_prepare(task);
4071 return -EAGAIN;
4072 }
4073 if (task->tk_status >= 0) {
4074 renew_lease(NFS_SERVER(inode), data->timestamp);
4075 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4076 }
4077 return 0;
4078 }
4079
4080 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4081 struct nfs_writeargs *args)
4082 {
4083
4084 if (!nfs4_error_stateid_expired(task->tk_status) ||
4085 nfs4_stateid_is_current(&args->stateid,
4086 args->context,
4087 args->lock_context,
4088 FMODE_WRITE))
4089 return false;
4090 rpc_restart_call_prepare(task);
4091 return true;
4092 }
4093
4094 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4095 {
4096 if (!nfs4_sequence_done(task, &data->res.seq_res))
4097 return -EAGAIN;
4098 if (nfs4_write_stateid_changed(task, &data->args))
4099 return -EAGAIN;
4100 return data->write_done_cb ? data->write_done_cb(task, data) :
4101 nfs4_write_done_cb(task, data);
4102 }
4103
4104 static
4105 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
4106 {
4107 const struct nfs_pgio_header *hdr = data->header;
4108
4109 /* Don't request attributes for pNFS or O_DIRECT writes */
4110 if (data->ds_clp != NULL || hdr->dreq != NULL)
4111 return false;
4112 /* Otherwise, request attributes if and only if we don't hold
4113 * a delegation
4114 */
4115 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4116 }
4117
4118 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
4119 {
4120 struct nfs_server *server = NFS_SERVER(data->header->inode);
4121
4122 if (!nfs4_write_need_cache_consistency_data(data)) {
4123 data->args.bitmask = NULL;
4124 data->res.fattr = NULL;
4125 } else
4126 data->args.bitmask = server->cache_consistency_bitmask;
4127
4128 if (!data->write_done_cb)
4129 data->write_done_cb = nfs4_write_done_cb;
4130 data->res.server = server;
4131 data->timestamp = jiffies;
4132
4133 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4134 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4135 }
4136
4137 static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4138 {
4139 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
4140 &data->args.seq_args,
4141 &data->res.seq_res,
4142 task))
4143 return 0;
4144 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4145 data->args.lock_context, FMODE_WRITE) == -EIO)
4146 return -EIO;
4147 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4148 return -EIO;
4149 return 0;
4150 }
4151
4152 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4153 {
4154 nfs4_setup_sequence(NFS_SERVER(data->inode),
4155 &data->args.seq_args,
4156 &data->res.seq_res,
4157 task);
4158 }
4159
4160 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4161 {
4162 struct inode *inode = data->inode;
4163
4164 trace_nfs4_commit(data, task->tk_status);
4165 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4166 rpc_restart_call_prepare(task);
4167 return -EAGAIN;
4168 }
4169 return 0;
4170 }
4171
4172 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4173 {
4174 if (!nfs4_sequence_done(task, &data->res.seq_res))
4175 return -EAGAIN;
4176 return data->commit_done_cb(task, data);
4177 }
4178
4179 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4180 {
4181 struct nfs_server *server = NFS_SERVER(data->inode);
4182
4183 if (data->commit_done_cb == NULL)
4184 data->commit_done_cb = nfs4_commit_done_cb;
4185 data->res.server = server;
4186 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4187 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4188 }
4189
4190 struct nfs4_renewdata {
4191 struct nfs_client *client;
4192 unsigned long timestamp;
4193 };
4194
4195 /*
4196 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4197 * standalone procedure for queueing an asynchronous RENEW.
4198 */
4199 static void nfs4_renew_release(void *calldata)
4200 {
4201 struct nfs4_renewdata *data = calldata;
4202 struct nfs_client *clp = data->client;
4203
4204 if (atomic_read(&clp->cl_count) > 1)
4205 nfs4_schedule_state_renewal(clp);
4206 nfs_put_client(clp);
4207 kfree(data);
4208 }
4209
4210 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4211 {
4212 struct nfs4_renewdata *data = calldata;
4213 struct nfs_client *clp = data->client;
4214 unsigned long timestamp = data->timestamp;
4215
4216 trace_nfs4_renew_async(clp, task->tk_status);
4217 if (task->tk_status < 0) {
4218 /* Unless we're shutting down, schedule state recovery! */
4219 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4220 return;
4221 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4222 nfs4_schedule_lease_recovery(clp);
4223 return;
4224 }
4225 nfs4_schedule_path_down_recovery(clp);
4226 }
4227 do_renew_lease(clp, timestamp);
4228 }
4229
4230 static const struct rpc_call_ops nfs4_renew_ops = {
4231 .rpc_call_done = nfs4_renew_done,
4232 .rpc_release = nfs4_renew_release,
4233 };
4234
4235 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4236 {
4237 struct rpc_message msg = {
4238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4239 .rpc_argp = clp,
4240 .rpc_cred = cred,
4241 };
4242 struct nfs4_renewdata *data;
4243
4244 if (renew_flags == 0)
4245 return 0;
4246 if (!atomic_inc_not_zero(&clp->cl_count))
4247 return -EIO;
4248 data = kmalloc(sizeof(*data), GFP_NOFS);
4249 if (data == NULL)
4250 return -ENOMEM;
4251 data->client = clp;
4252 data->timestamp = jiffies;
4253 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4254 &nfs4_renew_ops, data);
4255 }
4256
4257 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4258 {
4259 struct rpc_message msg = {
4260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4261 .rpc_argp = clp,
4262 .rpc_cred = cred,
4263 };
4264 unsigned long now = jiffies;
4265 int status;
4266
4267 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4268 if (status < 0)
4269 return status;
4270 do_renew_lease(clp, now);
4271 return 0;
4272 }
4273
4274 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4275 {
4276 return (server->caps & NFS_CAP_ACLS)
4277 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4278 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4279 }
4280
4281 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4282 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4283 * the stack.
4284 */
4285 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4286
4287 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4288 struct page **pages, unsigned int *pgbase)
4289 {
4290 struct page *newpage, **spages;
4291 int rc = 0;
4292 size_t len;
4293 spages = pages;
4294
4295 do {
4296 len = min_t(size_t, PAGE_SIZE, buflen);
4297 newpage = alloc_page(GFP_KERNEL);
4298
4299 if (newpage == NULL)
4300 goto unwind;
4301 memcpy(page_address(newpage), buf, len);
4302 buf += len;
4303 buflen -= len;
4304 *pages++ = newpage;
4305 rc++;
4306 } while (buflen != 0);
4307
4308 return rc;
4309
4310 unwind:
4311 for(; rc > 0; rc--)
4312 __free_page(spages[rc-1]);
4313 return -ENOMEM;
4314 }
4315
4316 struct nfs4_cached_acl {
4317 int cached;
4318 size_t len;
4319 char data[0];
4320 };
4321
4322 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4323 {
4324 struct nfs_inode *nfsi = NFS_I(inode);
4325
4326 spin_lock(&inode->i_lock);
4327 kfree(nfsi->nfs4_acl);
4328 nfsi->nfs4_acl = acl;
4329 spin_unlock(&inode->i_lock);
4330 }
4331
4332 static void nfs4_zap_acl_attr(struct inode *inode)
4333 {
4334 nfs4_set_cached_acl(inode, NULL);
4335 }
4336
4337 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4338 {
4339 struct nfs_inode *nfsi = NFS_I(inode);
4340 struct nfs4_cached_acl *acl;
4341 int ret = -ENOENT;
4342
4343 spin_lock(&inode->i_lock);
4344 acl = nfsi->nfs4_acl;
4345 if (acl == NULL)
4346 goto out;
4347 if (buf == NULL) /* user is just asking for length */
4348 goto out_len;
4349 if (acl->cached == 0)
4350 goto out;
4351 ret = -ERANGE; /* see getxattr(2) man page */
4352 if (acl->len > buflen)
4353 goto out;
4354 memcpy(buf, acl->data, acl->len);
4355 out_len:
4356 ret = acl->len;
4357 out:
4358 spin_unlock(&inode->i_lock);
4359 return ret;
4360 }
4361
4362 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4363 {
4364 struct nfs4_cached_acl *acl;
4365 size_t buflen = sizeof(*acl) + acl_len;
4366
4367 if (buflen <= PAGE_SIZE) {
4368 acl = kmalloc(buflen, GFP_KERNEL);
4369 if (acl == NULL)
4370 goto out;
4371 acl->cached = 1;
4372 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4373 } else {
4374 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4375 if (acl == NULL)
4376 goto out;
4377 acl->cached = 0;
4378 }
4379 acl->len = acl_len;
4380 out:
4381 nfs4_set_cached_acl(inode, acl);
4382 }
4383
4384 /*
4385 * The getxattr API returns the required buffer length when called with a
4386 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4387 * the required buf. On a NULL buf, we send a page of data to the server
4388 * guessing that the ACL request can be serviced by a page. If so, we cache
4389 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4390 * the cache. If not so, we throw away the page, and cache the required
4391 * length. The next getxattr call will then produce another round trip to
4392 * the server, this time with the input buf of the required size.
4393 */
4394 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4395 {
4396 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4397 struct nfs_getaclargs args = {
4398 .fh = NFS_FH(inode),
4399 .acl_pages = pages,
4400 .acl_len = buflen,
4401 };
4402 struct nfs_getaclres res = {
4403 .acl_len = buflen,
4404 };
4405 struct rpc_message msg = {
4406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4407 .rpc_argp = &args,
4408 .rpc_resp = &res,
4409 };
4410 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4411 int ret = -ENOMEM, i;
4412
4413 /* As long as we're doing a round trip to the server anyway,
4414 * let's be prepared for a page of acl data. */
4415 if (npages == 0)
4416 npages = 1;
4417 if (npages > ARRAY_SIZE(pages))
4418 return -ERANGE;
4419
4420 for (i = 0; i < npages; i++) {
4421 pages[i] = alloc_page(GFP_KERNEL);
4422 if (!pages[i])
4423 goto out_free;
4424 }
4425
4426 /* for decoding across pages */
4427 res.acl_scratch = alloc_page(GFP_KERNEL);
4428 if (!res.acl_scratch)
4429 goto out_free;
4430
4431 args.acl_len = npages * PAGE_SIZE;
4432 args.acl_pgbase = 0;
4433
4434 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4435 __func__, buf, buflen, npages, args.acl_len);
4436 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4437 &msg, &args.seq_args, &res.seq_res, 0);
4438 if (ret)
4439 goto out_free;
4440
4441 /* Handle the case where the passed-in buffer is too short */
4442 if (res.acl_flags & NFS4_ACL_TRUNC) {
4443 /* Did the user only issue a request for the acl length? */
4444 if (buf == NULL)
4445 goto out_ok;
4446 ret = -ERANGE;
4447 goto out_free;
4448 }
4449 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4450 if (buf) {
4451 if (res.acl_len > buflen) {
4452 ret = -ERANGE;
4453 goto out_free;
4454 }
4455 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4456 }
4457 out_ok:
4458 ret = res.acl_len;
4459 out_free:
4460 for (i = 0; i < npages; i++)
4461 if (pages[i])
4462 __free_page(pages[i]);
4463 if (res.acl_scratch)
4464 __free_page(res.acl_scratch);
4465 return ret;
4466 }
4467
4468 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4469 {
4470 struct nfs4_exception exception = { };
4471 ssize_t ret;
4472 do {
4473 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4474 trace_nfs4_get_acl(inode, ret);
4475 if (ret >= 0)
4476 break;
4477 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4478 } while (exception.retry);
4479 return ret;
4480 }
4481
4482 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4483 {
4484 struct nfs_server *server = NFS_SERVER(inode);
4485 int ret;
4486
4487 if (!nfs4_server_supports_acls(server))
4488 return -EOPNOTSUPP;
4489 ret = nfs_revalidate_inode(server, inode);
4490 if (ret < 0)
4491 return ret;
4492 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4493 nfs_zap_acl_cache(inode);
4494 ret = nfs4_read_cached_acl(inode, buf, buflen);
4495 if (ret != -ENOENT)
4496 /* -ENOENT is returned if there is no ACL or if there is an ACL
4497 * but no cached acl data, just the acl length */
4498 return ret;
4499 return nfs4_get_acl_uncached(inode, buf, buflen);
4500 }
4501
4502 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4503 {
4504 struct nfs_server *server = NFS_SERVER(inode);
4505 struct page *pages[NFS4ACL_MAXPAGES];
4506 struct nfs_setaclargs arg = {
4507 .fh = NFS_FH(inode),
4508 .acl_pages = pages,
4509 .acl_len = buflen,
4510 };
4511 struct nfs_setaclres res;
4512 struct rpc_message msg = {
4513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4514 .rpc_argp = &arg,
4515 .rpc_resp = &res,
4516 };
4517 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4518 int ret, i;
4519
4520 if (!nfs4_server_supports_acls(server))
4521 return -EOPNOTSUPP;
4522 if (npages > ARRAY_SIZE(pages))
4523 return -ERANGE;
4524 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4525 if (i < 0)
4526 return i;
4527 nfs4_inode_return_delegation(inode);
4528 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4529
4530 /*
4531 * Free each page after tx, so the only ref left is
4532 * held by the network stack
4533 */
4534 for (; i > 0; i--)
4535 put_page(pages[i-1]);
4536
4537 /*
4538 * Acl update can result in inode attribute update.
4539 * so mark the attribute cache invalid.
4540 */
4541 spin_lock(&inode->i_lock);
4542 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4543 spin_unlock(&inode->i_lock);
4544 nfs_access_zap_cache(inode);
4545 nfs_zap_acl_cache(inode);
4546 return ret;
4547 }
4548
4549 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4550 {
4551 struct nfs4_exception exception = { };
4552 int err;
4553 do {
4554 err = __nfs4_proc_set_acl(inode, buf, buflen);
4555 trace_nfs4_set_acl(inode, err);
4556 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4557 &exception);
4558 } while (exception.retry);
4559 return err;
4560 }
4561
4562 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4563 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4564 size_t buflen)
4565 {
4566 struct nfs_server *server = NFS_SERVER(inode);
4567 struct nfs_fattr fattr;
4568 struct nfs4_label label = {0, 0, buflen, buf};
4569
4570 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4571 struct nfs4_getattr_arg args = {
4572 .fh = NFS_FH(inode),
4573 .bitmask = bitmask,
4574 };
4575 struct nfs4_getattr_res res = {
4576 .fattr = &fattr,
4577 .label = &label,
4578 .server = server,
4579 };
4580 struct rpc_message msg = {
4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4582 .rpc_argp = &args,
4583 .rpc_resp = &res,
4584 };
4585 int ret;
4586
4587 nfs_fattr_init(&fattr);
4588
4589 ret = rpc_call_sync(server->client, &msg, 0);
4590 if (ret)
4591 return ret;
4592 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4593 return -ENOENT;
4594 if (buflen < label.len)
4595 return -ERANGE;
4596 return 0;
4597 }
4598
4599 static int nfs4_get_security_label(struct inode *inode, void *buf,
4600 size_t buflen)
4601 {
4602 struct nfs4_exception exception = { };
4603 int err;
4604
4605 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4606 return -EOPNOTSUPP;
4607
4608 do {
4609 err = _nfs4_get_security_label(inode, buf, buflen);
4610 trace_nfs4_get_security_label(inode, err);
4611 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4612 &exception);
4613 } while (exception.retry);
4614 return err;
4615 }
4616
4617 static int _nfs4_do_set_security_label(struct inode *inode,
4618 struct nfs4_label *ilabel,
4619 struct nfs_fattr *fattr,
4620 struct nfs4_label *olabel)
4621 {
4622
4623 struct iattr sattr = {0};
4624 struct nfs_server *server = NFS_SERVER(inode);
4625 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4626 struct nfs_setattrargs args = {
4627 .fh = NFS_FH(inode),
4628 .iap = &sattr,
4629 .server = server,
4630 .bitmask = bitmask,
4631 .label = ilabel,
4632 };
4633 struct nfs_setattrres res = {
4634 .fattr = fattr,
4635 .label = olabel,
4636 .server = server,
4637 };
4638 struct rpc_message msg = {
4639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4640 .rpc_argp = &args,
4641 .rpc_resp = &res,
4642 };
4643 int status;
4644
4645 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4646
4647 status = rpc_call_sync(server->client, &msg, 0);
4648 if (status)
4649 dprintk("%s failed: %d\n", __func__, status);
4650
4651 return status;
4652 }
4653
4654 static int nfs4_do_set_security_label(struct inode *inode,
4655 struct nfs4_label *ilabel,
4656 struct nfs_fattr *fattr,
4657 struct nfs4_label *olabel)
4658 {
4659 struct nfs4_exception exception = { };
4660 int err;
4661
4662 do {
4663 err = _nfs4_do_set_security_label(inode, ilabel,
4664 fattr, olabel);
4665 trace_nfs4_set_security_label(inode, err);
4666 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4667 &exception);
4668 } while (exception.retry);
4669 return err;
4670 }
4671
4672 static int
4673 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4674 {
4675 struct nfs4_label ilabel, *olabel = NULL;
4676 struct nfs_fattr fattr;
4677 struct rpc_cred *cred;
4678 struct inode *inode = dentry->d_inode;
4679 int status;
4680
4681 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4682 return -EOPNOTSUPP;
4683
4684 nfs_fattr_init(&fattr);
4685
4686 ilabel.pi = 0;
4687 ilabel.lfs = 0;
4688 ilabel.label = (char *)buf;
4689 ilabel.len = buflen;
4690
4691 cred = rpc_lookup_cred();
4692 if (IS_ERR(cred))
4693 return PTR_ERR(cred);
4694
4695 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4696 if (IS_ERR(olabel)) {
4697 status = -PTR_ERR(olabel);
4698 goto out;
4699 }
4700
4701 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4702 if (status == 0)
4703 nfs_setsecurity(inode, &fattr, olabel);
4704
4705 nfs4_label_free(olabel);
4706 out:
4707 put_rpccred(cred);
4708 return status;
4709 }
4710 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4711
4712
4713 static int
4714 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4715 {
4716 struct nfs_client *clp = server->nfs_client;
4717
4718 if (task->tk_status >= 0)
4719 return 0;
4720 switch(task->tk_status) {
4721 case -NFS4ERR_DELEG_REVOKED:
4722 case -NFS4ERR_ADMIN_REVOKED:
4723 case -NFS4ERR_BAD_STATEID:
4724 if (state == NULL)
4725 break;
4726 nfs_remove_bad_delegation(state->inode);
4727 case -NFS4ERR_OPENMODE:
4728 if (state == NULL)
4729 break;
4730 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4731 goto stateid_invalid;
4732 goto wait_on_recovery;
4733 case -NFS4ERR_EXPIRED:
4734 if (state != NULL) {
4735 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4736 goto stateid_invalid;
4737 }
4738 case -NFS4ERR_STALE_STATEID:
4739 case -NFS4ERR_STALE_CLIENTID:
4740 nfs4_schedule_lease_recovery(clp);
4741 goto wait_on_recovery;
4742 #if defined(CONFIG_NFS_V4_1)
4743 case -NFS4ERR_BADSESSION:
4744 case -NFS4ERR_BADSLOT:
4745 case -NFS4ERR_BAD_HIGH_SLOT:
4746 case -NFS4ERR_DEADSESSION:
4747 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4748 case -NFS4ERR_SEQ_FALSE_RETRY:
4749 case -NFS4ERR_SEQ_MISORDERED:
4750 dprintk("%s ERROR %d, Reset session\n", __func__,
4751 task->tk_status);
4752 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4753 task->tk_status = 0;
4754 return -EAGAIN;
4755 #endif /* CONFIG_NFS_V4_1 */
4756 case -NFS4ERR_DELAY:
4757 nfs_inc_server_stats(server, NFSIOS_DELAY);
4758 case -NFS4ERR_GRACE:
4759 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4760 task->tk_status = 0;
4761 return -EAGAIN;
4762 case -NFS4ERR_RETRY_UNCACHED_REP:
4763 case -NFS4ERR_OLD_STATEID:
4764 task->tk_status = 0;
4765 return -EAGAIN;
4766 }
4767 task->tk_status = nfs4_map_errors(task->tk_status);
4768 return 0;
4769 stateid_invalid:
4770 task->tk_status = -EIO;
4771 return 0;
4772 wait_on_recovery:
4773 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4774 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4775 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4776 task->tk_status = 0;
4777 return -EAGAIN;
4778 }
4779
4780 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4781 nfs4_verifier *bootverf)
4782 {
4783 __be32 verf[2];
4784
4785 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4786 /* An impossible timestamp guarantees this value
4787 * will never match a generated boot time. */
4788 verf[0] = 0;
4789 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4790 } else {
4791 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4792 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4793 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4794 }
4795 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4796 }
4797
4798 static unsigned int
4799 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4800 char *buf, size_t len)
4801 {
4802 unsigned int result;
4803
4804 rcu_read_lock();
4805 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4806 clp->cl_ipaddr,
4807 rpc_peeraddr2str(clp->cl_rpcclient,
4808 RPC_DISPLAY_ADDR),
4809 rpc_peeraddr2str(clp->cl_rpcclient,
4810 RPC_DISPLAY_PROTO));
4811 rcu_read_unlock();
4812 return result;
4813 }
4814
4815 static unsigned int
4816 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4817 char *buf, size_t len)
4818 {
4819 const char *nodename = clp->cl_rpcclient->cl_nodename;
4820
4821 if (nfs4_client_id_uniquifier[0] != '\0')
4822 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4823 clp->rpc_ops->version,
4824 clp->cl_minorversion,
4825 nfs4_client_id_uniquifier,
4826 nodename);
4827 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4828 clp->rpc_ops->version, clp->cl_minorversion,
4829 nodename);
4830 }
4831
4832 /**
4833 * nfs4_proc_setclientid - Negotiate client ID
4834 * @clp: state data structure
4835 * @program: RPC program for NFSv4 callback service
4836 * @port: IP port number for NFS4 callback service
4837 * @cred: RPC credential to use for this call
4838 * @res: where to place the result
4839 *
4840 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4841 */
4842 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4843 unsigned short port, struct rpc_cred *cred,
4844 struct nfs4_setclientid_res *res)
4845 {
4846 nfs4_verifier sc_verifier;
4847 struct nfs4_setclientid setclientid = {
4848 .sc_verifier = &sc_verifier,
4849 .sc_prog = program,
4850 .sc_cb_ident = clp->cl_cb_ident,
4851 };
4852 struct rpc_message msg = {
4853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4854 .rpc_argp = &setclientid,
4855 .rpc_resp = res,
4856 .rpc_cred = cred,
4857 };
4858 int status;
4859
4860 /* nfs_client_id4 */
4861 nfs4_init_boot_verifier(clp, &sc_verifier);
4862 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4863 setclientid.sc_name_len =
4864 nfs4_init_uniform_client_string(clp,
4865 setclientid.sc_name,
4866 sizeof(setclientid.sc_name));
4867 else
4868 setclientid.sc_name_len =
4869 nfs4_init_nonuniform_client_string(clp,
4870 setclientid.sc_name,
4871 sizeof(setclientid.sc_name));
4872 /* cb_client4 */
4873 rcu_read_lock();
4874 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4875 sizeof(setclientid.sc_netid), "%s",
4876 rpc_peeraddr2str(clp->cl_rpcclient,
4877 RPC_DISPLAY_NETID));
4878 rcu_read_unlock();
4879 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4880 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4881 clp->cl_ipaddr, port >> 8, port & 255);
4882
4883 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4884 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4885 setclientid.sc_name_len, setclientid.sc_name);
4886 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4887 trace_nfs4_setclientid(clp, status);
4888 dprintk("NFS reply setclientid: %d\n", status);
4889 return status;
4890 }
4891
4892 /**
4893 * nfs4_proc_setclientid_confirm - Confirm client ID
4894 * @clp: state data structure
4895 * @res: result of a previous SETCLIENTID
4896 * @cred: RPC credential to use for this call
4897 *
4898 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4899 */
4900 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4901 struct nfs4_setclientid_res *arg,
4902 struct rpc_cred *cred)
4903 {
4904 struct rpc_message msg = {
4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4906 .rpc_argp = arg,
4907 .rpc_cred = cred,
4908 };
4909 int status;
4910
4911 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4912 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4913 clp->cl_clientid);
4914 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4915 trace_nfs4_setclientid_confirm(clp, status);
4916 dprintk("NFS reply setclientid_confirm: %d\n", status);
4917 return status;
4918 }
4919
4920 struct nfs4_delegreturndata {
4921 struct nfs4_delegreturnargs args;
4922 struct nfs4_delegreturnres res;
4923 struct nfs_fh fh;
4924 nfs4_stateid stateid;
4925 unsigned long timestamp;
4926 struct nfs_fattr fattr;
4927 int rpc_status;
4928 };
4929
4930 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4931 {
4932 struct nfs4_delegreturndata *data = calldata;
4933
4934 if (!nfs4_sequence_done(task, &data->res.seq_res))
4935 return;
4936
4937 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
4938 switch (task->tk_status) {
4939 case -NFS4ERR_STALE_STATEID:
4940 case -NFS4ERR_EXPIRED:
4941 case 0:
4942 renew_lease(data->res.server, data->timestamp);
4943 break;
4944 default:
4945 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4946 -EAGAIN) {
4947 rpc_restart_call_prepare(task);
4948 return;
4949 }
4950 }
4951 data->rpc_status = task->tk_status;
4952 }
4953
4954 static void nfs4_delegreturn_release(void *calldata)
4955 {
4956 kfree(calldata);
4957 }
4958
4959 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4960 {
4961 struct nfs4_delegreturndata *d_data;
4962
4963 d_data = (struct nfs4_delegreturndata *)data;
4964
4965 nfs4_setup_sequence(d_data->res.server,
4966 &d_data->args.seq_args,
4967 &d_data->res.seq_res,
4968 task);
4969 }
4970
4971 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4972 .rpc_call_prepare = nfs4_delegreturn_prepare,
4973 .rpc_call_done = nfs4_delegreturn_done,
4974 .rpc_release = nfs4_delegreturn_release,
4975 };
4976
4977 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4978 {
4979 struct nfs4_delegreturndata *data;
4980 struct nfs_server *server = NFS_SERVER(inode);
4981 struct rpc_task *task;
4982 struct rpc_message msg = {
4983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4984 .rpc_cred = cred,
4985 };
4986 struct rpc_task_setup task_setup_data = {
4987 .rpc_client = server->client,
4988 .rpc_message = &msg,
4989 .callback_ops = &nfs4_delegreturn_ops,
4990 .flags = RPC_TASK_ASYNC,
4991 };
4992 int status = 0;
4993
4994 data = kzalloc(sizeof(*data), GFP_NOFS);
4995 if (data == NULL)
4996 return -ENOMEM;
4997 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4998 data->args.fhandle = &data->fh;
4999 data->args.stateid = &data->stateid;
5000 data->args.bitmask = server->cache_consistency_bitmask;
5001 nfs_copy_fh(&data->fh, NFS_FH(inode));
5002 nfs4_stateid_copy(&data->stateid, stateid);
5003 data->res.fattr = &data->fattr;
5004 data->res.server = server;
5005 nfs_fattr_init(data->res.fattr);
5006 data->timestamp = jiffies;
5007 data->rpc_status = 0;
5008
5009 task_setup_data.callback_data = data;
5010 msg.rpc_argp = &data->args;
5011 msg.rpc_resp = &data->res;
5012 task = rpc_run_task(&task_setup_data);
5013 if (IS_ERR(task))
5014 return PTR_ERR(task);
5015 if (!issync)
5016 goto out;
5017 status = nfs4_wait_for_completion_rpc_task(task);
5018 if (status != 0)
5019 goto out;
5020 status = data->rpc_status;
5021 if (status == 0)
5022 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5023 else
5024 nfs_refresh_inode(inode, &data->fattr);
5025 out:
5026 rpc_put_task(task);
5027 return status;
5028 }
5029
5030 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5031 {
5032 struct nfs_server *server = NFS_SERVER(inode);
5033 struct nfs4_exception exception = { };
5034 int err;
5035 do {
5036 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5037 trace_nfs4_delegreturn(inode, err);
5038 switch (err) {
5039 case -NFS4ERR_STALE_STATEID:
5040 case -NFS4ERR_EXPIRED:
5041 case 0:
5042 return 0;
5043 }
5044 err = nfs4_handle_exception(server, err, &exception);
5045 } while (exception.retry);
5046 return err;
5047 }
5048
5049 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5050 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5051
5052 /*
5053 * sleep, with exponential backoff, and retry the LOCK operation.
5054 */
5055 static unsigned long
5056 nfs4_set_lock_task_retry(unsigned long timeout)
5057 {
5058 freezable_schedule_timeout_killable_unsafe(timeout);
5059 timeout <<= 1;
5060 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5061 return NFS4_LOCK_MAXTIMEOUT;
5062 return timeout;
5063 }
5064
5065 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5066 {
5067 struct inode *inode = state->inode;
5068 struct nfs_server *server = NFS_SERVER(inode);
5069 struct nfs_client *clp = server->nfs_client;
5070 struct nfs_lockt_args arg = {
5071 .fh = NFS_FH(inode),
5072 .fl = request,
5073 };
5074 struct nfs_lockt_res res = {
5075 .denied = request,
5076 };
5077 struct rpc_message msg = {
5078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5079 .rpc_argp = &arg,
5080 .rpc_resp = &res,
5081 .rpc_cred = state->owner->so_cred,
5082 };
5083 struct nfs4_lock_state *lsp;
5084 int status;
5085
5086 arg.lock_owner.clientid = clp->cl_clientid;
5087 status = nfs4_set_lock_state(state, request);
5088 if (status != 0)
5089 goto out;
5090 lsp = request->fl_u.nfs4_fl.owner;
5091 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5092 arg.lock_owner.s_dev = server->s_dev;
5093 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5094 switch (status) {
5095 case 0:
5096 request->fl_type = F_UNLCK;
5097 break;
5098 case -NFS4ERR_DENIED:
5099 status = 0;
5100 }
5101 request->fl_ops->fl_release_private(request);
5102 request->fl_ops = NULL;
5103 out:
5104 return status;
5105 }
5106
5107 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5108 {
5109 struct nfs4_exception exception = { };
5110 int err;
5111
5112 do {
5113 err = _nfs4_proc_getlk(state, cmd, request);
5114 trace_nfs4_get_lock(request, state, cmd, err);
5115 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5116 &exception);
5117 } while (exception.retry);
5118 return err;
5119 }
5120
5121 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5122 {
5123 int res = 0;
5124 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5125 case FL_POSIX:
5126 res = posix_lock_file_wait(file, fl);
5127 break;
5128 case FL_FLOCK:
5129 res = flock_lock_file_wait(file, fl);
5130 break;
5131 default:
5132 BUG();
5133 }
5134 return res;
5135 }
5136
5137 struct nfs4_unlockdata {
5138 struct nfs_locku_args arg;
5139 struct nfs_locku_res res;
5140 struct nfs4_lock_state *lsp;
5141 struct nfs_open_context *ctx;
5142 struct file_lock fl;
5143 const struct nfs_server *server;
5144 unsigned long timestamp;
5145 };
5146
5147 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5148 struct nfs_open_context *ctx,
5149 struct nfs4_lock_state *lsp,
5150 struct nfs_seqid *seqid)
5151 {
5152 struct nfs4_unlockdata *p;
5153 struct inode *inode = lsp->ls_state->inode;
5154
5155 p = kzalloc(sizeof(*p), GFP_NOFS);
5156 if (p == NULL)
5157 return NULL;
5158 p->arg.fh = NFS_FH(inode);
5159 p->arg.fl = &p->fl;
5160 p->arg.seqid = seqid;
5161 p->res.seqid = seqid;
5162 p->arg.stateid = &lsp->ls_stateid;
5163 p->lsp = lsp;
5164 atomic_inc(&lsp->ls_count);
5165 /* Ensure we don't close file until we're done freeing locks! */
5166 p->ctx = get_nfs_open_context(ctx);
5167 memcpy(&p->fl, fl, sizeof(p->fl));
5168 p->server = NFS_SERVER(inode);
5169 return p;
5170 }
5171
5172 static void nfs4_locku_release_calldata(void *data)
5173 {
5174 struct nfs4_unlockdata *calldata = data;
5175 nfs_free_seqid(calldata->arg.seqid);
5176 nfs4_put_lock_state(calldata->lsp);
5177 put_nfs_open_context(calldata->ctx);
5178 kfree(calldata);
5179 }
5180
5181 static void nfs4_locku_done(struct rpc_task *task, void *data)
5182 {
5183 struct nfs4_unlockdata *calldata = data;
5184
5185 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5186 return;
5187 switch (task->tk_status) {
5188 case 0:
5189 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5190 &calldata->res.stateid);
5191 renew_lease(calldata->server, calldata->timestamp);
5192 break;
5193 case -NFS4ERR_BAD_STATEID:
5194 case -NFS4ERR_OLD_STATEID:
5195 case -NFS4ERR_STALE_STATEID:
5196 case -NFS4ERR_EXPIRED:
5197 break;
5198 default:
5199 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5200 rpc_restart_call_prepare(task);
5201 }
5202 nfs_release_seqid(calldata->arg.seqid);
5203 }
5204
5205 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5206 {
5207 struct nfs4_unlockdata *calldata = data;
5208
5209 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5210 goto out_wait;
5211 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5212 /* Note: exit _without_ running nfs4_locku_done */
5213 goto out_no_action;
5214 }
5215 calldata->timestamp = jiffies;
5216 if (nfs4_setup_sequence(calldata->server,
5217 &calldata->arg.seq_args,
5218 &calldata->res.seq_res,
5219 task) != 0)
5220 nfs_release_seqid(calldata->arg.seqid);
5221 return;
5222 out_no_action:
5223 task->tk_action = NULL;
5224 out_wait:
5225 nfs4_sequence_done(task, &calldata->res.seq_res);
5226 }
5227
5228 static const struct rpc_call_ops nfs4_locku_ops = {
5229 .rpc_call_prepare = nfs4_locku_prepare,
5230 .rpc_call_done = nfs4_locku_done,
5231 .rpc_release = nfs4_locku_release_calldata,
5232 };
5233
5234 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5235 struct nfs_open_context *ctx,
5236 struct nfs4_lock_state *lsp,
5237 struct nfs_seqid *seqid)
5238 {
5239 struct nfs4_unlockdata *data;
5240 struct rpc_message msg = {
5241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5242 .rpc_cred = ctx->cred,
5243 };
5244 struct rpc_task_setup task_setup_data = {
5245 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5246 .rpc_message = &msg,
5247 .callback_ops = &nfs4_locku_ops,
5248 .workqueue = nfsiod_workqueue,
5249 .flags = RPC_TASK_ASYNC,
5250 };
5251
5252 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5253 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5254
5255 /* Ensure this is an unlock - when canceling a lock, the
5256 * canceled lock is passed in, and it won't be an unlock.
5257 */
5258 fl->fl_type = F_UNLCK;
5259
5260 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5261 if (data == NULL) {
5262 nfs_free_seqid(seqid);
5263 return ERR_PTR(-ENOMEM);
5264 }
5265
5266 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5267 msg.rpc_argp = &data->arg;
5268 msg.rpc_resp = &data->res;
5269 task_setup_data.callback_data = data;
5270 return rpc_run_task(&task_setup_data);
5271 }
5272
5273 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5274 {
5275 struct inode *inode = state->inode;
5276 struct nfs4_state_owner *sp = state->owner;
5277 struct nfs_inode *nfsi = NFS_I(inode);
5278 struct nfs_seqid *seqid;
5279 struct nfs4_lock_state *lsp;
5280 struct rpc_task *task;
5281 int status = 0;
5282 unsigned char fl_flags = request->fl_flags;
5283
5284 status = nfs4_set_lock_state(state, request);
5285 /* Unlock _before_ we do the RPC call */
5286 request->fl_flags |= FL_EXISTS;
5287 /* Exclude nfs_delegation_claim_locks() */
5288 mutex_lock(&sp->so_delegreturn_mutex);
5289 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5290 down_read(&nfsi->rwsem);
5291 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5292 up_read(&nfsi->rwsem);
5293 mutex_unlock(&sp->so_delegreturn_mutex);
5294 goto out;
5295 }
5296 up_read(&nfsi->rwsem);
5297 mutex_unlock(&sp->so_delegreturn_mutex);
5298 if (status != 0)
5299 goto out;
5300 /* Is this a delegated lock? */
5301 lsp = request->fl_u.nfs4_fl.owner;
5302 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5303 goto out;
5304 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5305 status = -ENOMEM;
5306 if (seqid == NULL)
5307 goto out;
5308 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5309 status = PTR_ERR(task);
5310 if (IS_ERR(task))
5311 goto out;
5312 status = nfs4_wait_for_completion_rpc_task(task);
5313 rpc_put_task(task);
5314 out:
5315 request->fl_flags = fl_flags;
5316 trace_nfs4_unlock(request, state, F_SETLK, status);
5317 return status;
5318 }
5319
5320 struct nfs4_lockdata {
5321 struct nfs_lock_args arg;
5322 struct nfs_lock_res res;
5323 struct nfs4_lock_state *lsp;
5324 struct nfs_open_context *ctx;
5325 struct file_lock fl;
5326 unsigned long timestamp;
5327 int rpc_status;
5328 int cancelled;
5329 struct nfs_server *server;
5330 };
5331
5332 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5333 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5334 gfp_t gfp_mask)
5335 {
5336 struct nfs4_lockdata *p;
5337 struct inode *inode = lsp->ls_state->inode;
5338 struct nfs_server *server = NFS_SERVER(inode);
5339
5340 p = kzalloc(sizeof(*p), gfp_mask);
5341 if (p == NULL)
5342 return NULL;
5343
5344 p->arg.fh = NFS_FH(inode);
5345 p->arg.fl = &p->fl;
5346 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5347 if (p->arg.open_seqid == NULL)
5348 goto out_free;
5349 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5350 if (p->arg.lock_seqid == NULL)
5351 goto out_free_seqid;
5352 p->arg.lock_stateid = &lsp->ls_stateid;
5353 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5354 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5355 p->arg.lock_owner.s_dev = server->s_dev;
5356 p->res.lock_seqid = p->arg.lock_seqid;
5357 p->lsp = lsp;
5358 p->server = server;
5359 atomic_inc(&lsp->ls_count);
5360 p->ctx = get_nfs_open_context(ctx);
5361 memcpy(&p->fl, fl, sizeof(p->fl));
5362 return p;
5363 out_free_seqid:
5364 nfs_free_seqid(p->arg.open_seqid);
5365 out_free:
5366 kfree(p);
5367 return NULL;
5368 }
5369
5370 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5371 {
5372 struct nfs4_lockdata *data = calldata;
5373 struct nfs4_state *state = data->lsp->ls_state;
5374
5375 dprintk("%s: begin!\n", __func__);
5376 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5377 goto out_wait;
5378 /* Do we need to do an open_to_lock_owner? */
5379 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5380 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5381 goto out_release_lock_seqid;
5382 }
5383 data->arg.open_stateid = &state->open_stateid;
5384 data->arg.new_lock_owner = 1;
5385 data->res.open_seqid = data->arg.open_seqid;
5386 } else
5387 data->arg.new_lock_owner = 0;
5388 if (!nfs4_valid_open_stateid(state)) {
5389 data->rpc_status = -EBADF;
5390 task->tk_action = NULL;
5391 goto out_release_open_seqid;
5392 }
5393 data->timestamp = jiffies;
5394 if (nfs4_setup_sequence(data->server,
5395 &data->arg.seq_args,
5396 &data->res.seq_res,
5397 task) == 0)
5398 return;
5399 out_release_open_seqid:
5400 nfs_release_seqid(data->arg.open_seqid);
5401 out_release_lock_seqid:
5402 nfs_release_seqid(data->arg.lock_seqid);
5403 out_wait:
5404 nfs4_sequence_done(task, &data->res.seq_res);
5405 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5406 }
5407
5408 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5409 {
5410 struct nfs4_lockdata *data = calldata;
5411
5412 dprintk("%s: begin!\n", __func__);
5413
5414 if (!nfs4_sequence_done(task, &data->res.seq_res))
5415 return;
5416
5417 data->rpc_status = task->tk_status;
5418 if (data->arg.new_lock_owner != 0) {
5419 if (data->rpc_status == 0)
5420 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5421 else
5422 goto out;
5423 }
5424 if (data->rpc_status == 0) {
5425 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5426 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5427 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5428 }
5429 out:
5430 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5431 }
5432
5433 static void nfs4_lock_release(void *calldata)
5434 {
5435 struct nfs4_lockdata *data = calldata;
5436
5437 dprintk("%s: begin!\n", __func__);
5438 nfs_free_seqid(data->arg.open_seqid);
5439 if (data->cancelled != 0) {
5440 struct rpc_task *task;
5441 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5442 data->arg.lock_seqid);
5443 if (!IS_ERR(task))
5444 rpc_put_task_async(task);
5445 dprintk("%s: cancelling lock!\n", __func__);
5446 } else
5447 nfs_free_seqid(data->arg.lock_seqid);
5448 nfs4_put_lock_state(data->lsp);
5449 put_nfs_open_context(data->ctx);
5450 kfree(data);
5451 dprintk("%s: done!\n", __func__);
5452 }
5453
5454 static const struct rpc_call_ops nfs4_lock_ops = {
5455 .rpc_call_prepare = nfs4_lock_prepare,
5456 .rpc_call_done = nfs4_lock_done,
5457 .rpc_release = nfs4_lock_release,
5458 };
5459
5460 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5461 {
5462 switch (error) {
5463 case -NFS4ERR_ADMIN_REVOKED:
5464 case -NFS4ERR_BAD_STATEID:
5465 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5466 if (new_lock_owner != 0 ||
5467 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5468 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5469 break;
5470 case -NFS4ERR_STALE_STATEID:
5471 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5472 case -NFS4ERR_EXPIRED:
5473 nfs4_schedule_lease_recovery(server->nfs_client);
5474 };
5475 }
5476
5477 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5478 {
5479 struct nfs4_lockdata *data;
5480 struct rpc_task *task;
5481 struct rpc_message msg = {
5482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5483 .rpc_cred = state->owner->so_cred,
5484 };
5485 struct rpc_task_setup task_setup_data = {
5486 .rpc_client = NFS_CLIENT(state->inode),
5487 .rpc_message = &msg,
5488 .callback_ops = &nfs4_lock_ops,
5489 .workqueue = nfsiod_workqueue,
5490 .flags = RPC_TASK_ASYNC,
5491 };
5492 int ret;
5493
5494 dprintk("%s: begin!\n", __func__);
5495 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5496 fl->fl_u.nfs4_fl.owner,
5497 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5498 if (data == NULL)
5499 return -ENOMEM;
5500 if (IS_SETLKW(cmd))
5501 data->arg.block = 1;
5502 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5503 msg.rpc_argp = &data->arg;
5504 msg.rpc_resp = &data->res;
5505 task_setup_data.callback_data = data;
5506 if (recovery_type > NFS_LOCK_NEW) {
5507 if (recovery_type == NFS_LOCK_RECLAIM)
5508 data->arg.reclaim = NFS_LOCK_RECLAIM;
5509 nfs4_set_sequence_privileged(&data->arg.seq_args);
5510 }
5511 task = rpc_run_task(&task_setup_data);
5512 if (IS_ERR(task))
5513 return PTR_ERR(task);
5514 ret = nfs4_wait_for_completion_rpc_task(task);
5515 if (ret == 0) {
5516 ret = data->rpc_status;
5517 if (ret)
5518 nfs4_handle_setlk_error(data->server, data->lsp,
5519 data->arg.new_lock_owner, ret);
5520 } else
5521 data->cancelled = 1;
5522 rpc_put_task(task);
5523 dprintk("%s: done, ret = %d!\n", __func__, ret);
5524 return ret;
5525 }
5526
5527 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5528 {
5529 struct nfs_server *server = NFS_SERVER(state->inode);
5530 struct nfs4_exception exception = {
5531 .inode = state->inode,
5532 };
5533 int err;
5534
5535 do {
5536 /* Cache the lock if possible... */
5537 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5538 return 0;
5539 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5540 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5541 if (err != -NFS4ERR_DELAY)
5542 break;
5543 nfs4_handle_exception(server, err, &exception);
5544 } while (exception.retry);
5545 return err;
5546 }
5547
5548 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5549 {
5550 struct nfs_server *server = NFS_SERVER(state->inode);
5551 struct nfs4_exception exception = {
5552 .inode = state->inode,
5553 };
5554 int err;
5555
5556 err = nfs4_set_lock_state(state, request);
5557 if (err != 0)
5558 return err;
5559 if (!recover_lost_locks) {
5560 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5561 return 0;
5562 }
5563 do {
5564 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5565 return 0;
5566 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5567 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5568 switch (err) {
5569 default:
5570 goto out;
5571 case -NFS4ERR_GRACE:
5572 case -NFS4ERR_DELAY:
5573 nfs4_handle_exception(server, err, &exception);
5574 err = 0;
5575 }
5576 } while (exception.retry);
5577 out:
5578 return err;
5579 }
5580
5581 #if defined(CONFIG_NFS_V4_1)
5582 /**
5583 * nfs41_check_expired_locks - possibly free a lock stateid
5584 *
5585 * @state: NFSv4 state for an inode
5586 *
5587 * Returns NFS_OK if recovery for this stateid is now finished.
5588 * Otherwise a negative NFS4ERR value is returned.
5589 */
5590 static int nfs41_check_expired_locks(struct nfs4_state *state)
5591 {
5592 int status, ret = -NFS4ERR_BAD_STATEID;
5593 struct nfs4_lock_state *lsp;
5594 struct nfs_server *server = NFS_SERVER(state->inode);
5595
5596 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5597 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5598 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5599
5600 status = nfs41_test_stateid(server,
5601 &lsp->ls_stateid,
5602 cred);
5603 trace_nfs4_test_lock_stateid(state, lsp, status);
5604 if (status != NFS_OK) {
5605 /* Free the stateid unless the server
5606 * informs us the stateid is unrecognized. */
5607 if (status != -NFS4ERR_BAD_STATEID)
5608 nfs41_free_stateid(server,
5609 &lsp->ls_stateid,
5610 cred);
5611 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5612 ret = status;
5613 }
5614 }
5615 };
5616
5617 return ret;
5618 }
5619
5620 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5621 {
5622 int status = NFS_OK;
5623
5624 if (test_bit(LK_STATE_IN_USE, &state->flags))
5625 status = nfs41_check_expired_locks(state);
5626 if (status != NFS_OK)
5627 status = nfs4_lock_expired(state, request);
5628 return status;
5629 }
5630 #endif
5631
5632 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5633 {
5634 struct nfs4_state_owner *sp = state->owner;
5635 struct nfs_inode *nfsi = NFS_I(state->inode);
5636 unsigned char fl_flags = request->fl_flags;
5637 unsigned int seq;
5638 int status = -ENOLCK;
5639
5640 if ((fl_flags & FL_POSIX) &&
5641 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5642 goto out;
5643 /* Is this a delegated open? */
5644 status = nfs4_set_lock_state(state, request);
5645 if (status != 0)
5646 goto out;
5647 request->fl_flags |= FL_ACCESS;
5648 status = do_vfs_lock(request->fl_file, request);
5649 if (status < 0)
5650 goto out;
5651 down_read(&nfsi->rwsem);
5652 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5653 /* Yes: cache locks! */
5654 /* ...but avoid races with delegation recall... */
5655 request->fl_flags = fl_flags & ~FL_SLEEP;
5656 status = do_vfs_lock(request->fl_file, request);
5657 goto out_unlock;
5658 }
5659 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5660 up_read(&nfsi->rwsem);
5661 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5662 if (status != 0)
5663 goto out;
5664 down_read(&nfsi->rwsem);
5665 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5666 status = -NFS4ERR_DELAY;
5667 goto out_unlock;
5668 }
5669 /* Note: we always want to sleep here! */
5670 request->fl_flags = fl_flags | FL_SLEEP;
5671 if (do_vfs_lock(request->fl_file, request) < 0)
5672 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5673 "manager!\n", __func__);
5674 out_unlock:
5675 up_read(&nfsi->rwsem);
5676 out:
5677 request->fl_flags = fl_flags;
5678 return status;
5679 }
5680
5681 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5682 {
5683 struct nfs4_exception exception = {
5684 .state = state,
5685 .inode = state->inode,
5686 };
5687 int err;
5688
5689 do {
5690 err = _nfs4_proc_setlk(state, cmd, request);
5691 trace_nfs4_set_lock(request, state, cmd, err);
5692 if (err == -NFS4ERR_DENIED)
5693 err = -EAGAIN;
5694 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5695 err, &exception);
5696 } while (exception.retry);
5697 return err;
5698 }
5699
5700 static int
5701 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5702 {
5703 struct nfs_open_context *ctx;
5704 struct nfs4_state *state;
5705 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5706 int status;
5707
5708 /* verify open state */
5709 ctx = nfs_file_open_context(filp);
5710 state = ctx->state;
5711
5712 if (request->fl_start < 0 || request->fl_end < 0)
5713 return -EINVAL;
5714
5715 if (IS_GETLK(cmd)) {
5716 if (state != NULL)
5717 return nfs4_proc_getlk(state, F_GETLK, request);
5718 return 0;
5719 }
5720
5721 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5722 return -EINVAL;
5723
5724 if (request->fl_type == F_UNLCK) {
5725 if (state != NULL)
5726 return nfs4_proc_unlck(state, cmd, request);
5727 return 0;
5728 }
5729
5730 if (state == NULL)
5731 return -ENOLCK;
5732 /*
5733 * Don't rely on the VFS having checked the file open mode,
5734 * since it won't do this for flock() locks.
5735 */
5736 switch (request->fl_type) {
5737 case F_RDLCK:
5738 if (!(filp->f_mode & FMODE_READ))
5739 return -EBADF;
5740 break;
5741 case F_WRLCK:
5742 if (!(filp->f_mode & FMODE_WRITE))
5743 return -EBADF;
5744 }
5745
5746 do {
5747 status = nfs4_proc_setlk(state, cmd, request);
5748 if ((status != -EAGAIN) || IS_SETLK(cmd))
5749 break;
5750 timeout = nfs4_set_lock_task_retry(timeout);
5751 status = -ERESTARTSYS;
5752 if (signalled())
5753 break;
5754 } while(status < 0);
5755 return status;
5756 }
5757
5758 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5759 {
5760 struct nfs_server *server = NFS_SERVER(state->inode);
5761 int err;
5762
5763 err = nfs4_set_lock_state(state, fl);
5764 if (err != 0)
5765 return err;
5766 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5767 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5768 }
5769
5770 struct nfs_release_lockowner_data {
5771 struct nfs4_lock_state *lsp;
5772 struct nfs_server *server;
5773 struct nfs_release_lockowner_args args;
5774 struct nfs4_sequence_args seq_args;
5775 struct nfs4_sequence_res seq_res;
5776 };
5777
5778 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5779 {
5780 struct nfs_release_lockowner_data *data = calldata;
5781 nfs40_setup_sequence(data->server,
5782 &data->seq_args, &data->seq_res, task);
5783 }
5784
5785 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5786 {
5787 struct nfs_release_lockowner_data *data = calldata;
5788 nfs40_sequence_done(task, &data->seq_res);
5789 }
5790
5791 static void nfs4_release_lockowner_release(void *calldata)
5792 {
5793 struct nfs_release_lockowner_data *data = calldata;
5794 nfs4_free_lock_state(data->server, data->lsp);
5795 kfree(calldata);
5796 }
5797
5798 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5799 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5800 .rpc_call_done = nfs4_release_lockowner_done,
5801 .rpc_release = nfs4_release_lockowner_release,
5802 };
5803
5804 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5805 {
5806 struct nfs_release_lockowner_data *data;
5807 struct rpc_message msg = {
5808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5809 };
5810
5811 if (server->nfs_client->cl_mvops->minor_version != 0)
5812 return -EINVAL;
5813
5814 data = kmalloc(sizeof(*data), GFP_NOFS);
5815 if (!data)
5816 return -ENOMEM;
5817 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
5818 data->lsp = lsp;
5819 data->server = server;
5820 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5821 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5822 data->args.lock_owner.s_dev = server->s_dev;
5823
5824 msg.rpc_argp = &data->args;
5825 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5826 return 0;
5827 }
5828
5829 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5830
5831 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5832 const void *buf, size_t buflen,
5833 int flags, int type)
5834 {
5835 if (strcmp(key, "") != 0)
5836 return -EINVAL;
5837
5838 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5839 }
5840
5841 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5842 void *buf, size_t buflen, int type)
5843 {
5844 if (strcmp(key, "") != 0)
5845 return -EINVAL;
5846
5847 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5848 }
5849
5850 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5851 size_t list_len, const char *name,
5852 size_t name_len, int type)
5853 {
5854 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5855
5856 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5857 return 0;
5858
5859 if (list && len <= list_len)
5860 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5861 return len;
5862 }
5863
5864 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5865 static inline int nfs4_server_supports_labels(struct nfs_server *server)
5866 {
5867 return server->caps & NFS_CAP_SECURITY_LABEL;
5868 }
5869
5870 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5871 const void *buf, size_t buflen,
5872 int flags, int type)
5873 {
5874 if (security_ismaclabel(key))
5875 return nfs4_set_security_label(dentry, buf, buflen);
5876
5877 return -EOPNOTSUPP;
5878 }
5879
5880 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5881 void *buf, size_t buflen, int type)
5882 {
5883 if (security_ismaclabel(key))
5884 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5885 return -EOPNOTSUPP;
5886 }
5887
5888 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5889 size_t list_len, const char *name,
5890 size_t name_len, int type)
5891 {
5892 size_t len = 0;
5893
5894 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5895 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5896 if (list && len <= list_len)
5897 security_inode_listsecurity(dentry->d_inode, list, len);
5898 }
5899 return len;
5900 }
5901
5902 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5903 .prefix = XATTR_SECURITY_PREFIX,
5904 .list = nfs4_xattr_list_nfs4_label,
5905 .get = nfs4_xattr_get_nfs4_label,
5906 .set = nfs4_xattr_set_nfs4_label,
5907 };
5908 #endif
5909
5910
5911 /*
5912 * nfs_fhget will use either the mounted_on_fileid or the fileid
5913 */
5914 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5915 {
5916 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5917 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5918 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5919 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5920 return;
5921
5922 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5923 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5924 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5925 fattr->nlink = 2;
5926 }
5927
5928 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5929 const struct qstr *name,
5930 struct nfs4_fs_locations *fs_locations,
5931 struct page *page)
5932 {
5933 struct nfs_server *server = NFS_SERVER(dir);
5934 u32 bitmask[3] = {
5935 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5936 };
5937 struct nfs4_fs_locations_arg args = {
5938 .dir_fh = NFS_FH(dir),
5939 .name = name,
5940 .page = page,
5941 .bitmask = bitmask,
5942 };
5943 struct nfs4_fs_locations_res res = {
5944 .fs_locations = fs_locations,
5945 };
5946 struct rpc_message msg = {
5947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5948 .rpc_argp = &args,
5949 .rpc_resp = &res,
5950 };
5951 int status;
5952
5953 dprintk("%s: start\n", __func__);
5954
5955 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5956 * is not supported */
5957 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5958 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5959 else
5960 bitmask[0] |= FATTR4_WORD0_FILEID;
5961
5962 nfs_fattr_init(&fs_locations->fattr);
5963 fs_locations->server = server;
5964 fs_locations->nlocations = 0;
5965 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5966 dprintk("%s: returned status = %d\n", __func__, status);
5967 return status;
5968 }
5969
5970 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5971 const struct qstr *name,
5972 struct nfs4_fs_locations *fs_locations,
5973 struct page *page)
5974 {
5975 struct nfs4_exception exception = { };
5976 int err;
5977 do {
5978 err = _nfs4_proc_fs_locations(client, dir, name,
5979 fs_locations, page);
5980 trace_nfs4_get_fs_locations(dir, name, err);
5981 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5982 &exception);
5983 } while (exception.retry);
5984 return err;
5985 }
5986
5987 /**
5988 * If 'use_integrity' is true and the state managment nfs_client
5989 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5990 * and the machine credential as per RFC3530bis and RFC5661 Security
5991 * Considerations sections. Otherwise, just use the user cred with the
5992 * filesystem's rpc_client.
5993 */
5994 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5995 {
5996 int status;
5997 struct nfs4_secinfo_arg args = {
5998 .dir_fh = NFS_FH(dir),
5999 .name = name,
6000 };
6001 struct nfs4_secinfo_res res = {
6002 .flavors = flavors,
6003 };
6004 struct rpc_message msg = {
6005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6006 .rpc_argp = &args,
6007 .rpc_resp = &res,
6008 };
6009 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6010 struct rpc_cred *cred = NULL;
6011
6012 if (use_integrity) {
6013 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6014 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6015 msg.rpc_cred = cred;
6016 }
6017
6018 dprintk("NFS call secinfo %s\n", name->name);
6019
6020 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6021 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6022
6023 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6024 &res.seq_res, 0);
6025 dprintk("NFS reply secinfo: %d\n", status);
6026
6027 if (cred)
6028 put_rpccred(cred);
6029
6030 return status;
6031 }
6032
6033 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6034 struct nfs4_secinfo_flavors *flavors)
6035 {
6036 struct nfs4_exception exception = { };
6037 int err;
6038 do {
6039 err = -NFS4ERR_WRONGSEC;
6040
6041 /* try to use integrity protection with machine cred */
6042 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6043 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6044
6045 /*
6046 * if unable to use integrity protection, or SECINFO with
6047 * integrity protection returns NFS4ERR_WRONGSEC (which is
6048 * disallowed by spec, but exists in deployed servers) use
6049 * the current filesystem's rpc_client and the user cred.
6050 */
6051 if (err == -NFS4ERR_WRONGSEC)
6052 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6053
6054 trace_nfs4_secinfo(dir, name, err);
6055 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6056 &exception);
6057 } while (exception.retry);
6058 return err;
6059 }
6060
6061 #ifdef CONFIG_NFS_V4_1
6062 /*
6063 * Check the exchange flags returned by the server for invalid flags, having
6064 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6065 * DS flags set.
6066 */
6067 static int nfs4_check_cl_exchange_flags(u32 flags)
6068 {
6069 if (flags & ~EXCHGID4_FLAG_MASK_R)
6070 goto out_inval;
6071 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6072 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6073 goto out_inval;
6074 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6075 goto out_inval;
6076 return NFS_OK;
6077 out_inval:
6078 return -NFS4ERR_INVAL;
6079 }
6080
6081 static bool
6082 nfs41_same_server_scope(struct nfs41_server_scope *a,
6083 struct nfs41_server_scope *b)
6084 {
6085 if (a->server_scope_sz == b->server_scope_sz &&
6086 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6087 return true;
6088
6089 return false;
6090 }
6091
6092 /*
6093 * nfs4_proc_bind_conn_to_session()
6094 *
6095 * The 4.1 client currently uses the same TCP connection for the
6096 * fore and backchannel.
6097 */
6098 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6099 {
6100 int status;
6101 struct nfs41_bind_conn_to_session_res res;
6102 struct rpc_message msg = {
6103 .rpc_proc =
6104 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6105 .rpc_argp = clp,
6106 .rpc_resp = &res,
6107 .rpc_cred = cred,
6108 };
6109
6110 dprintk("--> %s\n", __func__);
6111
6112 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6113 if (unlikely(res.session == NULL)) {
6114 status = -ENOMEM;
6115 goto out;
6116 }
6117
6118 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6119 trace_nfs4_bind_conn_to_session(clp, status);
6120 if (status == 0) {
6121 if (memcmp(res.session->sess_id.data,
6122 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6123 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6124 status = -EIO;
6125 goto out_session;
6126 }
6127 if (res.dir != NFS4_CDFS4_BOTH) {
6128 dprintk("NFS: %s: Unexpected direction from server\n",
6129 __func__);
6130 status = -EIO;
6131 goto out_session;
6132 }
6133 if (res.use_conn_in_rdma_mode) {
6134 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6135 __func__);
6136 status = -EIO;
6137 goto out_session;
6138 }
6139 }
6140 out_session:
6141 kfree(res.session);
6142 out:
6143 dprintk("<-- %s status= %d\n", __func__, status);
6144 return status;
6145 }
6146
6147 /*
6148 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6149 * and operations we'd like to see to enable certain features in the allow map
6150 */
6151 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6152 .how = SP4_MACH_CRED,
6153 .enforce.u.words = {
6154 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6155 1 << (OP_EXCHANGE_ID - 32) |
6156 1 << (OP_CREATE_SESSION - 32) |
6157 1 << (OP_DESTROY_SESSION - 32) |
6158 1 << (OP_DESTROY_CLIENTID - 32)
6159 },
6160 .allow.u.words = {
6161 [0] = 1 << (OP_CLOSE) |
6162 1 << (OP_LOCKU) |
6163 1 << (OP_COMMIT),
6164 [1] = 1 << (OP_SECINFO - 32) |
6165 1 << (OP_SECINFO_NO_NAME - 32) |
6166 1 << (OP_TEST_STATEID - 32) |
6167 1 << (OP_FREE_STATEID - 32) |
6168 1 << (OP_WRITE - 32)
6169 }
6170 };
6171
6172 /*
6173 * Select the state protection mode for client `clp' given the server results
6174 * from exchange_id in `sp'.
6175 *
6176 * Returns 0 on success, negative errno otherwise.
6177 */
6178 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6179 struct nfs41_state_protection *sp)
6180 {
6181 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6182 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6183 1 << (OP_EXCHANGE_ID - 32) |
6184 1 << (OP_CREATE_SESSION - 32) |
6185 1 << (OP_DESTROY_SESSION - 32) |
6186 1 << (OP_DESTROY_CLIENTID - 32)
6187 };
6188 unsigned int i;
6189
6190 if (sp->how == SP4_MACH_CRED) {
6191 /* Print state protect result */
6192 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6193 for (i = 0; i <= LAST_NFS4_OP; i++) {
6194 if (test_bit(i, sp->enforce.u.longs))
6195 dfprintk(MOUNT, " enforce op %d\n", i);
6196 if (test_bit(i, sp->allow.u.longs))
6197 dfprintk(MOUNT, " allow op %d\n", i);
6198 }
6199
6200 /* make sure nothing is on enforce list that isn't supported */
6201 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6202 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6203 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6204 return -EINVAL;
6205 }
6206 }
6207
6208 /*
6209 * Minimal mode - state operations are allowed to use machine
6210 * credential. Note this already happens by default, so the
6211 * client doesn't have to do anything more than the negotiation.
6212 *
6213 * NOTE: we don't care if EXCHANGE_ID is in the list -
6214 * we're already using the machine cred for exchange_id
6215 * and will never use a different cred.
6216 */
6217 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6218 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6219 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6220 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6221 dfprintk(MOUNT, "sp4_mach_cred:\n");
6222 dfprintk(MOUNT, " minimal mode enabled\n");
6223 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6224 } else {
6225 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6226 return -EINVAL;
6227 }
6228
6229 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6230 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6231 dfprintk(MOUNT, " cleanup mode enabled\n");
6232 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6233 }
6234
6235 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6236 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6237 dfprintk(MOUNT, " secinfo mode enabled\n");
6238 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6239 }
6240
6241 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6242 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6243 dfprintk(MOUNT, " stateid mode enabled\n");
6244 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6245 }
6246
6247 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6248 dfprintk(MOUNT, " write mode enabled\n");
6249 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6250 }
6251
6252 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6253 dfprintk(MOUNT, " commit mode enabled\n");
6254 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6255 }
6256 }
6257
6258 return 0;
6259 }
6260
6261 /*
6262 * _nfs4_proc_exchange_id()
6263 *
6264 * Wrapper for EXCHANGE_ID operation.
6265 */
6266 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6267 u32 sp4_how)
6268 {
6269 nfs4_verifier verifier;
6270 struct nfs41_exchange_id_args args = {
6271 .verifier = &verifier,
6272 .client = clp,
6273 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6274 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6275 };
6276 struct nfs41_exchange_id_res res = {
6277 0
6278 };
6279 int status;
6280 struct rpc_message msg = {
6281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6282 .rpc_argp = &args,
6283 .rpc_resp = &res,
6284 .rpc_cred = cred,
6285 };
6286
6287 nfs4_init_boot_verifier(clp, &verifier);
6288 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6289 sizeof(args.id));
6290 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6291 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6292 args.id_len, args.id);
6293
6294 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6295 GFP_NOFS);
6296 if (unlikely(res.server_owner == NULL)) {
6297 status = -ENOMEM;
6298 goto out;
6299 }
6300
6301 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6302 GFP_NOFS);
6303 if (unlikely(res.server_scope == NULL)) {
6304 status = -ENOMEM;
6305 goto out_server_owner;
6306 }
6307
6308 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6309 if (unlikely(res.impl_id == NULL)) {
6310 status = -ENOMEM;
6311 goto out_server_scope;
6312 }
6313
6314 switch (sp4_how) {
6315 case SP4_NONE:
6316 args.state_protect.how = SP4_NONE;
6317 break;
6318
6319 case SP4_MACH_CRED:
6320 args.state_protect = nfs4_sp4_mach_cred_request;
6321 break;
6322
6323 default:
6324 /* unsupported! */
6325 WARN_ON_ONCE(1);
6326 status = -EINVAL;
6327 goto out_server_scope;
6328 }
6329
6330 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6331 trace_nfs4_exchange_id(clp, status);
6332 if (status == 0)
6333 status = nfs4_check_cl_exchange_flags(res.flags);
6334
6335 if (status == 0)
6336 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6337
6338 if (status == 0) {
6339 clp->cl_clientid = res.clientid;
6340 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6341 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6342 clp->cl_seqid = res.seqid;
6343
6344 kfree(clp->cl_serverowner);
6345 clp->cl_serverowner = res.server_owner;
6346 res.server_owner = NULL;
6347
6348 /* use the most recent implementation id */
6349 kfree(clp->cl_implid);
6350 clp->cl_implid = res.impl_id;
6351
6352 if (clp->cl_serverscope != NULL &&
6353 !nfs41_same_server_scope(clp->cl_serverscope,
6354 res.server_scope)) {
6355 dprintk("%s: server_scope mismatch detected\n",
6356 __func__);
6357 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6358 kfree(clp->cl_serverscope);
6359 clp->cl_serverscope = NULL;
6360 }
6361
6362 if (clp->cl_serverscope == NULL) {
6363 clp->cl_serverscope = res.server_scope;
6364 goto out;
6365 }
6366 } else
6367 kfree(res.impl_id);
6368
6369 out_server_owner:
6370 kfree(res.server_owner);
6371 out_server_scope:
6372 kfree(res.server_scope);
6373 out:
6374 if (clp->cl_implid != NULL)
6375 dprintk("NFS reply exchange_id: Server Implementation ID: "
6376 "domain: %s, name: %s, date: %llu,%u\n",
6377 clp->cl_implid->domain, clp->cl_implid->name,
6378 clp->cl_implid->date.seconds,
6379 clp->cl_implid->date.nseconds);
6380 dprintk("NFS reply exchange_id: %d\n", status);
6381 return status;
6382 }
6383
6384 /*
6385 * nfs4_proc_exchange_id()
6386 *
6387 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6388 *
6389 * Since the clientid has expired, all compounds using sessions
6390 * associated with the stale clientid will be returning
6391 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6392 * be in some phase of session reset.
6393 *
6394 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6395 */
6396 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6397 {
6398 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6399 int status;
6400
6401 /* try SP4_MACH_CRED if krb5i/p */
6402 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6403 authflavor == RPC_AUTH_GSS_KRB5P) {
6404 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6405 if (!status)
6406 return 0;
6407 }
6408
6409 /* try SP4_NONE */
6410 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6411 }
6412
6413 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6414 struct rpc_cred *cred)
6415 {
6416 struct rpc_message msg = {
6417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6418 .rpc_argp = clp,
6419 .rpc_cred = cred,
6420 };
6421 int status;
6422
6423 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6424 trace_nfs4_destroy_clientid(clp, status);
6425 if (status)
6426 dprintk("NFS: Got error %d from the server %s on "
6427 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6428 return status;
6429 }
6430
6431 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6432 struct rpc_cred *cred)
6433 {
6434 unsigned int loop;
6435 int ret;
6436
6437 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6438 ret = _nfs4_proc_destroy_clientid(clp, cred);
6439 switch (ret) {
6440 case -NFS4ERR_DELAY:
6441 case -NFS4ERR_CLIENTID_BUSY:
6442 ssleep(1);
6443 break;
6444 default:
6445 return ret;
6446 }
6447 }
6448 return 0;
6449 }
6450
6451 int nfs4_destroy_clientid(struct nfs_client *clp)
6452 {
6453 struct rpc_cred *cred;
6454 int ret = 0;
6455
6456 if (clp->cl_mvops->minor_version < 1)
6457 goto out;
6458 if (clp->cl_exchange_flags == 0)
6459 goto out;
6460 if (clp->cl_preserve_clid)
6461 goto out;
6462 cred = nfs4_get_clid_cred(clp);
6463 ret = nfs4_proc_destroy_clientid(clp, cred);
6464 if (cred)
6465 put_rpccred(cred);
6466 switch (ret) {
6467 case 0:
6468 case -NFS4ERR_STALE_CLIENTID:
6469 clp->cl_exchange_flags = 0;
6470 }
6471 out:
6472 return ret;
6473 }
6474
6475 struct nfs4_get_lease_time_data {
6476 struct nfs4_get_lease_time_args *args;
6477 struct nfs4_get_lease_time_res *res;
6478 struct nfs_client *clp;
6479 };
6480
6481 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6482 void *calldata)
6483 {
6484 struct nfs4_get_lease_time_data *data =
6485 (struct nfs4_get_lease_time_data *)calldata;
6486
6487 dprintk("--> %s\n", __func__);
6488 /* just setup sequence, do not trigger session recovery
6489 since we're invoked within one */
6490 nfs41_setup_sequence(data->clp->cl_session,
6491 &data->args->la_seq_args,
6492 &data->res->lr_seq_res,
6493 task);
6494 dprintk("<-- %s\n", __func__);
6495 }
6496
6497 /*
6498 * Called from nfs4_state_manager thread for session setup, so don't recover
6499 * from sequence operation or clientid errors.
6500 */
6501 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6502 {
6503 struct nfs4_get_lease_time_data *data =
6504 (struct nfs4_get_lease_time_data *)calldata;
6505
6506 dprintk("--> %s\n", __func__);
6507 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6508 return;
6509 switch (task->tk_status) {
6510 case -NFS4ERR_DELAY:
6511 case -NFS4ERR_GRACE:
6512 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6513 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6514 task->tk_status = 0;
6515 /* fall through */
6516 case -NFS4ERR_RETRY_UNCACHED_REP:
6517 rpc_restart_call_prepare(task);
6518 return;
6519 }
6520 dprintk("<-- %s\n", __func__);
6521 }
6522
6523 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
6524 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6525 .rpc_call_done = nfs4_get_lease_time_done,
6526 };
6527
6528 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6529 {
6530 struct rpc_task *task;
6531 struct nfs4_get_lease_time_args args;
6532 struct nfs4_get_lease_time_res res = {
6533 .lr_fsinfo = fsinfo,
6534 };
6535 struct nfs4_get_lease_time_data data = {
6536 .args = &args,
6537 .res = &res,
6538 .clp = clp,
6539 };
6540 struct rpc_message msg = {
6541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6542 .rpc_argp = &args,
6543 .rpc_resp = &res,
6544 };
6545 struct rpc_task_setup task_setup = {
6546 .rpc_client = clp->cl_rpcclient,
6547 .rpc_message = &msg,
6548 .callback_ops = &nfs4_get_lease_time_ops,
6549 .callback_data = &data,
6550 .flags = RPC_TASK_TIMEOUT,
6551 };
6552 int status;
6553
6554 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
6555 nfs4_set_sequence_privileged(&args.la_seq_args);
6556 dprintk("--> %s\n", __func__);
6557 task = rpc_run_task(&task_setup);
6558
6559 if (IS_ERR(task))
6560 status = PTR_ERR(task);
6561 else {
6562 status = task->tk_status;
6563 rpc_put_task(task);
6564 }
6565 dprintk("<-- %s return %d\n", __func__, status);
6566
6567 return status;
6568 }
6569
6570 /*
6571 * Initialize the values to be used by the client in CREATE_SESSION
6572 * If nfs4_init_session set the fore channel request and response sizes,
6573 * use them.
6574 *
6575 * Set the back channel max_resp_sz_cached to zero to force the client to
6576 * always set csa_cachethis to FALSE because the current implementation
6577 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6578 */
6579 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6580 {
6581 unsigned int max_rqst_sz, max_resp_sz;
6582
6583 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6584 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
6585
6586 /* Fore channel attributes */
6587 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6588 args->fc_attrs.max_resp_sz = max_resp_sz;
6589 args->fc_attrs.max_ops = NFS4_MAX_OPS;
6590 args->fc_attrs.max_reqs = max_session_slots;
6591
6592 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
6593 "max_ops=%u max_reqs=%u\n",
6594 __func__,
6595 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
6596 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
6597
6598 /* Back channel attributes */
6599 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6600 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6601 args->bc_attrs.max_resp_sz_cached = 0;
6602 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6603 args->bc_attrs.max_reqs = 1;
6604
6605 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6606 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6607 __func__,
6608 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6609 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6610 args->bc_attrs.max_reqs);
6611 }
6612
6613 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6614 {
6615 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6616 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6617
6618 if (rcvd->max_resp_sz > sent->max_resp_sz)
6619 return -EINVAL;
6620 /*
6621 * Our requested max_ops is the minimum we need; we're not
6622 * prepared to break up compounds into smaller pieces than that.
6623 * So, no point even trying to continue if the server won't
6624 * cooperate:
6625 */
6626 if (rcvd->max_ops < sent->max_ops)
6627 return -EINVAL;
6628 if (rcvd->max_reqs == 0)
6629 return -EINVAL;
6630 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6631 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
6632 return 0;
6633 }
6634
6635 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6636 {
6637 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6638 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
6639
6640 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6641 return -EINVAL;
6642 if (rcvd->max_resp_sz < sent->max_resp_sz)
6643 return -EINVAL;
6644 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6645 return -EINVAL;
6646 /* These would render the backchannel useless: */
6647 if (rcvd->max_ops != sent->max_ops)
6648 return -EINVAL;
6649 if (rcvd->max_reqs != sent->max_reqs)
6650 return -EINVAL;
6651 return 0;
6652 }
6653
6654 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6655 struct nfs4_session *session)
6656 {
6657 int ret;
6658
6659 ret = nfs4_verify_fore_channel_attrs(args, session);
6660 if (ret)
6661 return ret;
6662 return nfs4_verify_back_channel_attrs(args, session);
6663 }
6664
6665 static int _nfs4_proc_create_session(struct nfs_client *clp,
6666 struct rpc_cred *cred)
6667 {
6668 struct nfs4_session *session = clp->cl_session;
6669 struct nfs41_create_session_args args = {
6670 .client = clp,
6671 .cb_program = NFS4_CALLBACK,
6672 };
6673 struct nfs41_create_session_res res = {
6674 .client = clp,
6675 };
6676 struct rpc_message msg = {
6677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6678 .rpc_argp = &args,
6679 .rpc_resp = &res,
6680 .rpc_cred = cred,
6681 };
6682 int status;
6683
6684 nfs4_init_channel_attrs(&args);
6685 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
6686
6687 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6688 trace_nfs4_create_session(clp, status);
6689
6690 if (!status) {
6691 /* Verify the session's negotiated channel_attrs values */
6692 status = nfs4_verify_channel_attrs(&args, session);
6693 /* Increment the clientid slot sequence id */
6694 clp->cl_seqid++;
6695 }
6696
6697 return status;
6698 }
6699
6700 /*
6701 * Issues a CREATE_SESSION operation to the server.
6702 * It is the responsibility of the caller to verify the session is
6703 * expired before calling this routine.
6704 */
6705 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
6706 {
6707 int status;
6708 unsigned *ptr;
6709 struct nfs4_session *session = clp->cl_session;
6710
6711 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6712
6713 status = _nfs4_proc_create_session(clp, cred);
6714 if (status)
6715 goto out;
6716
6717 /* Init or reset the session slot tables */
6718 status = nfs4_setup_session_slot_tables(session);
6719 dprintk("slot table setup returned %d\n", status);
6720 if (status)
6721 goto out;
6722
6723 ptr = (unsigned *)&session->sess_id.data[0];
6724 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6725 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
6726 out:
6727 dprintk("<-- %s\n", __func__);
6728 return status;
6729 }
6730
6731 /*
6732 * Issue the over-the-wire RPC DESTROY_SESSION.
6733 * The caller must serialize access to this routine.
6734 */
6735 int nfs4_proc_destroy_session(struct nfs4_session *session,
6736 struct rpc_cred *cred)
6737 {
6738 struct rpc_message msg = {
6739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6740 .rpc_argp = session,
6741 .rpc_cred = cred,
6742 };
6743 int status = 0;
6744
6745 dprintk("--> nfs4_proc_destroy_session\n");
6746
6747 /* session is still being setup */
6748 if (session->clp->cl_cons_state != NFS_CS_READY)
6749 return status;
6750
6751 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6752 trace_nfs4_destroy_session(session->clp, status);
6753
6754 if (status)
6755 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
6756 "Session has been destroyed regardless...\n", status);
6757
6758 dprintk("<-- nfs4_proc_destroy_session\n");
6759 return status;
6760 }
6761
6762 /*
6763 * Renew the cl_session lease.
6764 */
6765 struct nfs4_sequence_data {
6766 struct nfs_client *clp;
6767 struct nfs4_sequence_args args;
6768 struct nfs4_sequence_res res;
6769 };
6770
6771 static void nfs41_sequence_release(void *data)
6772 {
6773 struct nfs4_sequence_data *calldata = data;
6774 struct nfs_client *clp = calldata->clp;
6775
6776 if (atomic_read(&clp->cl_count) > 1)
6777 nfs4_schedule_state_renewal(clp);
6778 nfs_put_client(clp);
6779 kfree(calldata);
6780 }
6781
6782 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6783 {
6784 switch(task->tk_status) {
6785 case -NFS4ERR_DELAY:
6786 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6787 return -EAGAIN;
6788 default:
6789 nfs4_schedule_lease_recovery(clp);
6790 }
6791 return 0;
6792 }
6793
6794 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6795 {
6796 struct nfs4_sequence_data *calldata = data;
6797 struct nfs_client *clp = calldata->clp;
6798
6799 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6800 return;
6801
6802 trace_nfs4_sequence(clp, task->tk_status);
6803 if (task->tk_status < 0) {
6804 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6805 if (atomic_read(&clp->cl_count) == 1)
6806 goto out;
6807
6808 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6809 rpc_restart_call_prepare(task);
6810 return;
6811 }
6812 }
6813 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6814 out:
6815 dprintk("<-- %s\n", __func__);
6816 }
6817
6818 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6819 {
6820 struct nfs4_sequence_data *calldata = data;
6821 struct nfs_client *clp = calldata->clp;
6822 struct nfs4_sequence_args *args;
6823 struct nfs4_sequence_res *res;
6824
6825 args = task->tk_msg.rpc_argp;
6826 res = task->tk_msg.rpc_resp;
6827
6828 nfs41_setup_sequence(clp->cl_session, args, res, task);
6829 }
6830
6831 static const struct rpc_call_ops nfs41_sequence_ops = {
6832 .rpc_call_done = nfs41_sequence_call_done,
6833 .rpc_call_prepare = nfs41_sequence_prepare,
6834 .rpc_release = nfs41_sequence_release,
6835 };
6836
6837 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6838 struct rpc_cred *cred,
6839 bool is_privileged)
6840 {
6841 struct nfs4_sequence_data *calldata;
6842 struct rpc_message msg = {
6843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6844 .rpc_cred = cred,
6845 };
6846 struct rpc_task_setup task_setup_data = {
6847 .rpc_client = clp->cl_rpcclient,
6848 .rpc_message = &msg,
6849 .callback_ops = &nfs41_sequence_ops,
6850 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6851 };
6852
6853 if (!atomic_inc_not_zero(&clp->cl_count))
6854 return ERR_PTR(-EIO);
6855 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6856 if (calldata == NULL) {
6857 nfs_put_client(clp);
6858 return ERR_PTR(-ENOMEM);
6859 }
6860 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
6861 if (is_privileged)
6862 nfs4_set_sequence_privileged(&calldata->args);
6863 msg.rpc_argp = &calldata->args;
6864 msg.rpc_resp = &calldata->res;
6865 calldata->clp = clp;
6866 task_setup_data.callback_data = calldata;
6867
6868 return rpc_run_task(&task_setup_data);
6869 }
6870
6871 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6872 {
6873 struct rpc_task *task;
6874 int ret = 0;
6875
6876 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6877 return 0;
6878 task = _nfs41_proc_sequence(clp, cred, false);
6879 if (IS_ERR(task))
6880 ret = PTR_ERR(task);
6881 else
6882 rpc_put_task_async(task);
6883 dprintk("<-- %s status=%d\n", __func__, ret);
6884 return ret;
6885 }
6886
6887 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6888 {
6889 struct rpc_task *task;
6890 int ret;
6891
6892 task = _nfs41_proc_sequence(clp, cred, true);
6893 if (IS_ERR(task)) {
6894 ret = PTR_ERR(task);
6895 goto out;
6896 }
6897 ret = rpc_wait_for_completion_task(task);
6898 if (!ret) {
6899 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6900
6901 if (task->tk_status == 0)
6902 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6903 ret = task->tk_status;
6904 }
6905 rpc_put_task(task);
6906 out:
6907 dprintk("<-- %s status=%d\n", __func__, ret);
6908 return ret;
6909 }
6910
6911 struct nfs4_reclaim_complete_data {
6912 struct nfs_client *clp;
6913 struct nfs41_reclaim_complete_args arg;
6914 struct nfs41_reclaim_complete_res res;
6915 };
6916
6917 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6918 {
6919 struct nfs4_reclaim_complete_data *calldata = data;
6920
6921 nfs41_setup_sequence(calldata->clp->cl_session,
6922 &calldata->arg.seq_args,
6923 &calldata->res.seq_res,
6924 task);
6925 }
6926
6927 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6928 {
6929 switch(task->tk_status) {
6930 case 0:
6931 case -NFS4ERR_COMPLETE_ALREADY:
6932 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6933 break;
6934 case -NFS4ERR_DELAY:
6935 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6936 /* fall through */
6937 case -NFS4ERR_RETRY_UNCACHED_REP:
6938 return -EAGAIN;
6939 default:
6940 nfs4_schedule_lease_recovery(clp);
6941 }
6942 return 0;
6943 }
6944
6945 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6946 {
6947 struct nfs4_reclaim_complete_data *calldata = data;
6948 struct nfs_client *clp = calldata->clp;
6949 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6950
6951 dprintk("--> %s\n", __func__);
6952 if (!nfs41_sequence_done(task, res))
6953 return;
6954
6955 trace_nfs4_reclaim_complete(clp, task->tk_status);
6956 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6957 rpc_restart_call_prepare(task);
6958 return;
6959 }
6960 dprintk("<-- %s\n", __func__);
6961 }
6962
6963 static void nfs4_free_reclaim_complete_data(void *data)
6964 {
6965 struct nfs4_reclaim_complete_data *calldata = data;
6966
6967 kfree(calldata);
6968 }
6969
6970 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6971 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6972 .rpc_call_done = nfs4_reclaim_complete_done,
6973 .rpc_release = nfs4_free_reclaim_complete_data,
6974 };
6975
6976 /*
6977 * Issue a global reclaim complete.
6978 */
6979 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6980 struct rpc_cred *cred)
6981 {
6982 struct nfs4_reclaim_complete_data *calldata;
6983 struct rpc_task *task;
6984 struct rpc_message msg = {
6985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6986 .rpc_cred = cred,
6987 };
6988 struct rpc_task_setup task_setup_data = {
6989 .rpc_client = clp->cl_rpcclient,
6990 .rpc_message = &msg,
6991 .callback_ops = &nfs4_reclaim_complete_call_ops,
6992 .flags = RPC_TASK_ASYNC,
6993 };
6994 int status = -ENOMEM;
6995
6996 dprintk("--> %s\n", __func__);
6997 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6998 if (calldata == NULL)
6999 goto out;
7000 calldata->clp = clp;
7001 calldata->arg.one_fs = 0;
7002
7003 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7004 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7005 msg.rpc_argp = &calldata->arg;
7006 msg.rpc_resp = &calldata->res;
7007 task_setup_data.callback_data = calldata;
7008 task = rpc_run_task(&task_setup_data);
7009 if (IS_ERR(task)) {
7010 status = PTR_ERR(task);
7011 goto out;
7012 }
7013 status = nfs4_wait_for_completion_rpc_task(task);
7014 if (status == 0)
7015 status = task->tk_status;
7016 rpc_put_task(task);
7017 return 0;
7018 out:
7019 dprintk("<-- %s status=%d\n", __func__, status);
7020 return status;
7021 }
7022
7023 static void
7024 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7025 {
7026 struct nfs4_layoutget *lgp = calldata;
7027 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7028 struct nfs4_session *session = nfs4_get_session(server);
7029
7030 dprintk("--> %s\n", __func__);
7031 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7032 * right now covering the LAYOUTGET we are about to send.
7033 * However, that is not so catastrophic, and there seems
7034 * to be no way to prevent it completely.
7035 */
7036 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7037 &lgp->res.seq_res, task))
7038 return;
7039 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7040 NFS_I(lgp->args.inode)->layout,
7041 lgp->args.ctx->state)) {
7042 rpc_exit(task, NFS4_OK);
7043 }
7044 }
7045
7046 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7047 {
7048 struct nfs4_layoutget *lgp = calldata;
7049 struct inode *inode = lgp->args.inode;
7050 struct nfs_server *server = NFS_SERVER(inode);
7051 struct pnfs_layout_hdr *lo;
7052 struct nfs4_state *state = NULL;
7053 unsigned long timeo, giveup;
7054
7055 dprintk("--> %s\n", __func__);
7056
7057 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7058 goto out;
7059
7060 switch (task->tk_status) {
7061 case 0:
7062 goto out;
7063 case -NFS4ERR_LAYOUTTRYLATER:
7064 case -NFS4ERR_RECALLCONFLICT:
7065 timeo = rpc_get_timeout(task->tk_client);
7066 giveup = lgp->args.timestamp + timeo;
7067 if (time_after(giveup, jiffies))
7068 task->tk_status = -NFS4ERR_DELAY;
7069 break;
7070 case -NFS4ERR_EXPIRED:
7071 case -NFS4ERR_BAD_STATEID:
7072 spin_lock(&inode->i_lock);
7073 lo = NFS_I(inode)->layout;
7074 if (!lo || list_empty(&lo->plh_segs)) {
7075 spin_unlock(&inode->i_lock);
7076 /* If the open stateid was bad, then recover it. */
7077 state = lgp->args.ctx->state;
7078 } else {
7079 LIST_HEAD(head);
7080
7081 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7082 spin_unlock(&inode->i_lock);
7083 /* Mark the bad layout state as invalid, then
7084 * retry using the open stateid. */
7085 pnfs_free_lseg_list(&head);
7086 }
7087 }
7088 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7089 rpc_restart_call_prepare(task);
7090 out:
7091 dprintk("<-- %s\n", __func__);
7092 }
7093
7094 static size_t max_response_pages(struct nfs_server *server)
7095 {
7096 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7097 return nfs_page_array_len(0, max_resp_sz);
7098 }
7099
7100 static void nfs4_free_pages(struct page **pages, size_t size)
7101 {
7102 int i;
7103
7104 if (!pages)
7105 return;
7106
7107 for (i = 0; i < size; i++) {
7108 if (!pages[i])
7109 break;
7110 __free_page(pages[i]);
7111 }
7112 kfree(pages);
7113 }
7114
7115 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7116 {
7117 struct page **pages;
7118 int i;
7119
7120 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7121 if (!pages) {
7122 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7123 return NULL;
7124 }
7125
7126 for (i = 0; i < size; i++) {
7127 pages[i] = alloc_page(gfp_flags);
7128 if (!pages[i]) {
7129 dprintk("%s: failed to allocate page\n", __func__);
7130 nfs4_free_pages(pages, size);
7131 return NULL;
7132 }
7133 }
7134
7135 return pages;
7136 }
7137
7138 static void nfs4_layoutget_release(void *calldata)
7139 {
7140 struct nfs4_layoutget *lgp = calldata;
7141 struct inode *inode = lgp->args.inode;
7142 struct nfs_server *server = NFS_SERVER(inode);
7143 size_t max_pages = max_response_pages(server);
7144
7145 dprintk("--> %s\n", __func__);
7146 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7147 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7148 put_nfs_open_context(lgp->args.ctx);
7149 kfree(calldata);
7150 dprintk("<-- %s\n", __func__);
7151 }
7152
7153 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7154 .rpc_call_prepare = nfs4_layoutget_prepare,
7155 .rpc_call_done = nfs4_layoutget_done,
7156 .rpc_release = nfs4_layoutget_release,
7157 };
7158
7159 struct pnfs_layout_segment *
7160 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7161 {
7162 struct inode *inode = lgp->args.inode;
7163 struct nfs_server *server = NFS_SERVER(inode);
7164 size_t max_pages = max_response_pages(server);
7165 struct rpc_task *task;
7166 struct rpc_message msg = {
7167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7168 .rpc_argp = &lgp->args,
7169 .rpc_resp = &lgp->res,
7170 .rpc_cred = lgp->cred,
7171 };
7172 struct rpc_task_setup task_setup_data = {
7173 .rpc_client = server->client,
7174 .rpc_message = &msg,
7175 .callback_ops = &nfs4_layoutget_call_ops,
7176 .callback_data = lgp,
7177 .flags = RPC_TASK_ASYNC,
7178 };
7179 struct pnfs_layout_segment *lseg = NULL;
7180 int status = 0;
7181
7182 dprintk("--> %s\n", __func__);
7183
7184 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7185 if (!lgp->args.layout.pages) {
7186 nfs4_layoutget_release(lgp);
7187 return ERR_PTR(-ENOMEM);
7188 }
7189 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7190 lgp->args.timestamp = jiffies;
7191
7192 lgp->res.layoutp = &lgp->args.layout;
7193 lgp->res.seq_res.sr_slot = NULL;
7194 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7195
7196 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7197 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7198
7199 task = rpc_run_task(&task_setup_data);
7200 if (IS_ERR(task))
7201 return ERR_CAST(task);
7202 status = nfs4_wait_for_completion_rpc_task(task);
7203 if (status == 0)
7204 status = task->tk_status;
7205 trace_nfs4_layoutget(lgp->args.ctx,
7206 &lgp->args.range,
7207 &lgp->res.range,
7208 status);
7209 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7210 if (status == 0 && lgp->res.layoutp->len)
7211 lseg = pnfs_layout_process(lgp);
7212 rpc_put_task(task);
7213 dprintk("<-- %s status=%d\n", __func__, status);
7214 if (status)
7215 return ERR_PTR(status);
7216 return lseg;
7217 }
7218
7219 static void
7220 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7221 {
7222 struct nfs4_layoutreturn *lrp = calldata;
7223
7224 dprintk("--> %s\n", __func__);
7225 nfs41_setup_sequence(lrp->clp->cl_session,
7226 &lrp->args.seq_args,
7227 &lrp->res.seq_res,
7228 task);
7229 }
7230
7231 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7232 {
7233 struct nfs4_layoutreturn *lrp = calldata;
7234 struct nfs_server *server;
7235
7236 dprintk("--> %s\n", __func__);
7237
7238 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7239 return;
7240
7241 server = NFS_SERVER(lrp->args.inode);
7242 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7243 rpc_restart_call_prepare(task);
7244 return;
7245 }
7246 dprintk("<-- %s\n", __func__);
7247 }
7248
7249 static void nfs4_layoutreturn_release(void *calldata)
7250 {
7251 struct nfs4_layoutreturn *lrp = calldata;
7252 struct pnfs_layout_hdr *lo = lrp->args.layout;
7253
7254 dprintk("--> %s\n", __func__);
7255 spin_lock(&lo->plh_inode->i_lock);
7256 if (lrp->res.lrs_present)
7257 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7258 lo->plh_block_lgets--;
7259 spin_unlock(&lo->plh_inode->i_lock);
7260 pnfs_put_layout_hdr(lrp->args.layout);
7261 kfree(calldata);
7262 dprintk("<-- %s\n", __func__);
7263 }
7264
7265 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7266 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7267 .rpc_call_done = nfs4_layoutreturn_done,
7268 .rpc_release = nfs4_layoutreturn_release,
7269 };
7270
7271 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7272 {
7273 struct rpc_task *task;
7274 struct rpc_message msg = {
7275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7276 .rpc_argp = &lrp->args,
7277 .rpc_resp = &lrp->res,
7278 .rpc_cred = lrp->cred,
7279 };
7280 struct rpc_task_setup task_setup_data = {
7281 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7282 .rpc_message = &msg,
7283 .callback_ops = &nfs4_layoutreturn_call_ops,
7284 .callback_data = lrp,
7285 };
7286 int status;
7287
7288 dprintk("--> %s\n", __func__);
7289 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7290 task = rpc_run_task(&task_setup_data);
7291 if (IS_ERR(task))
7292 return PTR_ERR(task);
7293 status = task->tk_status;
7294 trace_nfs4_layoutreturn(lrp->args.inode, status);
7295 dprintk("<-- %s status=%d\n", __func__, status);
7296 rpc_put_task(task);
7297 return status;
7298 }
7299
7300 /*
7301 * Retrieve the list of Data Server devices from the MDS.
7302 */
7303 static int _nfs4_getdevicelist(struct nfs_server *server,
7304 const struct nfs_fh *fh,
7305 struct pnfs_devicelist *devlist)
7306 {
7307 struct nfs4_getdevicelist_args args = {
7308 .fh = fh,
7309 .layoutclass = server->pnfs_curr_ld->id,
7310 };
7311 struct nfs4_getdevicelist_res res = {
7312 .devlist = devlist,
7313 };
7314 struct rpc_message msg = {
7315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7316 .rpc_argp = &args,
7317 .rpc_resp = &res,
7318 };
7319 int status;
7320
7321 dprintk("--> %s\n", __func__);
7322 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7323 &res.seq_res, 0);
7324 dprintk("<-- %s status=%d\n", __func__, status);
7325 return status;
7326 }
7327
7328 int nfs4_proc_getdevicelist(struct nfs_server *server,
7329 const struct nfs_fh *fh,
7330 struct pnfs_devicelist *devlist)
7331 {
7332 struct nfs4_exception exception = { };
7333 int err;
7334
7335 do {
7336 err = nfs4_handle_exception(server,
7337 _nfs4_getdevicelist(server, fh, devlist),
7338 &exception);
7339 } while (exception.retry);
7340
7341 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7342 err, devlist->num_devs);
7343
7344 return err;
7345 }
7346 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7347
7348 static int
7349 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7350 struct pnfs_device *pdev,
7351 struct rpc_cred *cred)
7352 {
7353 struct nfs4_getdeviceinfo_args args = {
7354 .pdev = pdev,
7355 };
7356 struct nfs4_getdeviceinfo_res res = {
7357 .pdev = pdev,
7358 };
7359 struct rpc_message msg = {
7360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7361 .rpc_argp = &args,
7362 .rpc_resp = &res,
7363 .rpc_cred = cred,
7364 };
7365 int status;
7366
7367 dprintk("--> %s\n", __func__);
7368 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7369 dprintk("<-- %s status=%d\n", __func__, status);
7370
7371 return status;
7372 }
7373
7374 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7375 struct pnfs_device *pdev,
7376 struct rpc_cred *cred)
7377 {
7378 struct nfs4_exception exception = { };
7379 int err;
7380
7381 do {
7382 err = nfs4_handle_exception(server,
7383 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7384 &exception);
7385 } while (exception.retry);
7386 return err;
7387 }
7388 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7389
7390 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7391 {
7392 struct nfs4_layoutcommit_data *data = calldata;
7393 struct nfs_server *server = NFS_SERVER(data->args.inode);
7394 struct nfs4_session *session = nfs4_get_session(server);
7395
7396 nfs41_setup_sequence(session,
7397 &data->args.seq_args,
7398 &data->res.seq_res,
7399 task);
7400 }
7401
7402 static void
7403 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7404 {
7405 struct nfs4_layoutcommit_data *data = calldata;
7406 struct nfs_server *server = NFS_SERVER(data->args.inode);
7407
7408 if (!nfs41_sequence_done(task, &data->res.seq_res))
7409 return;
7410
7411 switch (task->tk_status) { /* Just ignore these failures */
7412 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7413 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7414 case -NFS4ERR_BADLAYOUT: /* no layout */
7415 case -NFS4ERR_GRACE: /* loca_recalim always false */
7416 task->tk_status = 0;
7417 break;
7418 case 0:
7419 nfs_post_op_update_inode_force_wcc(data->args.inode,
7420 data->res.fattr);
7421 break;
7422 default:
7423 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7424 rpc_restart_call_prepare(task);
7425 return;
7426 }
7427 }
7428 }
7429
7430 static void nfs4_layoutcommit_release(void *calldata)
7431 {
7432 struct nfs4_layoutcommit_data *data = calldata;
7433
7434 pnfs_cleanup_layoutcommit(data);
7435 put_rpccred(data->cred);
7436 kfree(data);
7437 }
7438
7439 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7440 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7441 .rpc_call_done = nfs4_layoutcommit_done,
7442 .rpc_release = nfs4_layoutcommit_release,
7443 };
7444
7445 int
7446 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7447 {
7448 struct rpc_message msg = {
7449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7450 .rpc_argp = &data->args,
7451 .rpc_resp = &data->res,
7452 .rpc_cred = data->cred,
7453 };
7454 struct rpc_task_setup task_setup_data = {
7455 .task = &data->task,
7456 .rpc_client = NFS_CLIENT(data->args.inode),
7457 .rpc_message = &msg,
7458 .callback_ops = &nfs4_layoutcommit_ops,
7459 .callback_data = data,
7460 .flags = RPC_TASK_ASYNC,
7461 };
7462 struct rpc_task *task;
7463 int status = 0;
7464
7465 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7466 "lbw: %llu inode %lu\n",
7467 data->task.tk_pid, sync,
7468 data->args.lastbytewritten,
7469 data->args.inode->i_ino);
7470
7471 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7472 task = rpc_run_task(&task_setup_data);
7473 if (IS_ERR(task))
7474 return PTR_ERR(task);
7475 if (sync == false)
7476 goto out;
7477 status = nfs4_wait_for_completion_rpc_task(task);
7478 if (status != 0)
7479 goto out;
7480 status = task->tk_status;
7481 trace_nfs4_layoutcommit(data->args.inode, status);
7482 out:
7483 dprintk("%s: status %d\n", __func__, status);
7484 rpc_put_task(task);
7485 return status;
7486 }
7487
7488 /**
7489 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7490 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7491 */
7492 static int
7493 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7494 struct nfs_fsinfo *info,
7495 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7496 {
7497 struct nfs41_secinfo_no_name_args args = {
7498 .style = SECINFO_STYLE_CURRENT_FH,
7499 };
7500 struct nfs4_secinfo_res res = {
7501 .flavors = flavors,
7502 };
7503 struct rpc_message msg = {
7504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7505 .rpc_argp = &args,
7506 .rpc_resp = &res,
7507 };
7508 struct rpc_clnt *clnt = server->client;
7509 struct rpc_cred *cred = NULL;
7510 int status;
7511
7512 if (use_integrity) {
7513 clnt = server->nfs_client->cl_rpcclient;
7514 cred = nfs4_get_clid_cred(server->nfs_client);
7515 msg.rpc_cred = cred;
7516 }
7517
7518 dprintk("--> %s\n", __func__);
7519 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7520 &res.seq_res, 0);
7521 dprintk("<-- %s status=%d\n", __func__, status);
7522
7523 if (cred)
7524 put_rpccred(cred);
7525
7526 return status;
7527 }
7528
7529 static int
7530 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7531 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7532 {
7533 struct nfs4_exception exception = { };
7534 int err;
7535 do {
7536 /* first try using integrity protection */
7537 err = -NFS4ERR_WRONGSEC;
7538
7539 /* try to use integrity protection with machine cred */
7540 if (_nfs4_is_integrity_protected(server->nfs_client))
7541 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7542 flavors, true);
7543
7544 /*
7545 * if unable to use integrity protection, or SECINFO with
7546 * integrity protection returns NFS4ERR_WRONGSEC (which is
7547 * disallowed by spec, but exists in deployed servers) use
7548 * the current filesystem's rpc_client and the user cred.
7549 */
7550 if (err == -NFS4ERR_WRONGSEC)
7551 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7552 flavors, false);
7553
7554 switch (err) {
7555 case 0:
7556 case -NFS4ERR_WRONGSEC:
7557 case -NFS4ERR_NOTSUPP:
7558 goto out;
7559 default:
7560 err = nfs4_handle_exception(server, err, &exception);
7561 }
7562 } while (exception.retry);
7563 out:
7564 return err;
7565 }
7566
7567 static int
7568 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7569 struct nfs_fsinfo *info)
7570 {
7571 int err;
7572 struct page *page;
7573 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
7574 struct nfs4_secinfo_flavors *flavors;
7575 struct nfs4_secinfo4 *secinfo;
7576 int i;
7577
7578 page = alloc_page(GFP_KERNEL);
7579 if (!page) {
7580 err = -ENOMEM;
7581 goto out;
7582 }
7583
7584 flavors = page_address(page);
7585 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7586
7587 /*
7588 * Fall back on "guess and check" method if
7589 * the server doesn't support SECINFO_NO_NAME
7590 */
7591 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7592 err = nfs4_find_root_sec(server, fhandle, info);
7593 goto out_freepage;
7594 }
7595 if (err)
7596 goto out_freepage;
7597
7598 for (i = 0; i < flavors->num_flavors; i++) {
7599 secinfo = &flavors->flavors[i];
7600
7601 switch (secinfo->flavor) {
7602 case RPC_AUTH_NULL:
7603 case RPC_AUTH_UNIX:
7604 case RPC_AUTH_GSS:
7605 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7606 &secinfo->flavor_info);
7607 break;
7608 default:
7609 flavor = RPC_AUTH_MAXFLAVOR;
7610 break;
7611 }
7612
7613 if (flavor != RPC_AUTH_MAXFLAVOR) {
7614 err = nfs4_lookup_root_sec(server, fhandle,
7615 info, flavor);
7616 if (!err)
7617 break;
7618 }
7619 }
7620
7621 if (flavor == RPC_AUTH_MAXFLAVOR)
7622 err = -EPERM;
7623
7624 out_freepage:
7625 put_page(page);
7626 if (err == -EACCES)
7627 return -EPERM;
7628 out:
7629 return err;
7630 }
7631
7632 static int _nfs41_test_stateid(struct nfs_server *server,
7633 nfs4_stateid *stateid,
7634 struct rpc_cred *cred)
7635 {
7636 int status;
7637 struct nfs41_test_stateid_args args = {
7638 .stateid = stateid,
7639 };
7640 struct nfs41_test_stateid_res res;
7641 struct rpc_message msg = {
7642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7643 .rpc_argp = &args,
7644 .rpc_resp = &res,
7645 .rpc_cred = cred,
7646 };
7647 struct rpc_clnt *rpc_client = server->client;
7648
7649 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7650 &rpc_client, &msg);
7651
7652 dprintk("NFS call test_stateid %p\n", stateid);
7653 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7654 nfs4_set_sequence_privileged(&args.seq_args);
7655 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
7656 &args.seq_args, &res.seq_res);
7657 if (status != NFS_OK) {
7658 dprintk("NFS reply test_stateid: failed, %d\n", status);
7659 return status;
7660 }
7661 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
7662 return -res.status;
7663 }
7664
7665 /**
7666 * nfs41_test_stateid - perform a TEST_STATEID operation
7667 *
7668 * @server: server / transport on which to perform the operation
7669 * @stateid: state ID to test
7670 * @cred: credential
7671 *
7672 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7673 * Otherwise a negative NFS4ERR value is returned if the operation
7674 * failed or the state ID is not currently valid.
7675 */
7676 static int nfs41_test_stateid(struct nfs_server *server,
7677 nfs4_stateid *stateid,
7678 struct rpc_cred *cred)
7679 {
7680 struct nfs4_exception exception = { };
7681 int err;
7682 do {
7683 err = _nfs41_test_stateid(server, stateid, cred);
7684 if (err != -NFS4ERR_DELAY)
7685 break;
7686 nfs4_handle_exception(server, err, &exception);
7687 } while (exception.retry);
7688 return err;
7689 }
7690
7691 struct nfs_free_stateid_data {
7692 struct nfs_server *server;
7693 struct nfs41_free_stateid_args args;
7694 struct nfs41_free_stateid_res res;
7695 };
7696
7697 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7698 {
7699 struct nfs_free_stateid_data *data = calldata;
7700 nfs41_setup_sequence(nfs4_get_session(data->server),
7701 &data->args.seq_args,
7702 &data->res.seq_res,
7703 task);
7704 }
7705
7706 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7707 {
7708 struct nfs_free_stateid_data *data = calldata;
7709
7710 nfs41_sequence_done(task, &data->res.seq_res);
7711
7712 switch (task->tk_status) {
7713 case -NFS4ERR_DELAY:
7714 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7715 rpc_restart_call_prepare(task);
7716 }
7717 }
7718
7719 static void nfs41_free_stateid_release(void *calldata)
7720 {
7721 kfree(calldata);
7722 }
7723
7724 static const struct rpc_call_ops nfs41_free_stateid_ops = {
7725 .rpc_call_prepare = nfs41_free_stateid_prepare,
7726 .rpc_call_done = nfs41_free_stateid_done,
7727 .rpc_release = nfs41_free_stateid_release,
7728 };
7729
7730 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7731 nfs4_stateid *stateid,
7732 struct rpc_cred *cred,
7733 bool privileged)
7734 {
7735 struct rpc_message msg = {
7736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
7737 .rpc_cred = cred,
7738 };
7739 struct rpc_task_setup task_setup = {
7740 .rpc_client = server->client,
7741 .rpc_message = &msg,
7742 .callback_ops = &nfs41_free_stateid_ops,
7743 .flags = RPC_TASK_ASYNC,
7744 };
7745 struct nfs_free_stateid_data *data;
7746
7747 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7748 &task_setup.rpc_client, &msg);
7749
7750 dprintk("NFS call free_stateid %p\n", stateid);
7751 data = kmalloc(sizeof(*data), GFP_NOFS);
7752 if (!data)
7753 return ERR_PTR(-ENOMEM);
7754 data->server = server;
7755 nfs4_stateid_copy(&data->args.stateid, stateid);
7756
7757 task_setup.callback_data = data;
7758
7759 msg.rpc_argp = &data->args;
7760 msg.rpc_resp = &data->res;
7761 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7762 if (privileged)
7763 nfs4_set_sequence_privileged(&data->args.seq_args);
7764
7765 return rpc_run_task(&task_setup);
7766 }
7767
7768 /**
7769 * nfs41_free_stateid - perform a FREE_STATEID operation
7770 *
7771 * @server: server / transport on which to perform the operation
7772 * @stateid: state ID to release
7773 * @cred: credential
7774 *
7775 * Returns NFS_OK if the server freed "stateid". Otherwise a
7776 * negative NFS4ERR value is returned.
7777 */
7778 static int nfs41_free_stateid(struct nfs_server *server,
7779 nfs4_stateid *stateid,
7780 struct rpc_cred *cred)
7781 {
7782 struct rpc_task *task;
7783 int ret;
7784
7785 task = _nfs41_free_stateid(server, stateid, cred, true);
7786 if (IS_ERR(task))
7787 return PTR_ERR(task);
7788 ret = rpc_wait_for_completion_task(task);
7789 if (!ret)
7790 ret = task->tk_status;
7791 rpc_put_task(task);
7792 return ret;
7793 }
7794
7795 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7796 {
7797 struct rpc_task *task;
7798 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
7799
7800 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
7801 nfs4_free_lock_state(server, lsp);
7802 if (IS_ERR(task))
7803 return PTR_ERR(task);
7804 rpc_put_task(task);
7805 return 0;
7806 }
7807
7808 static bool nfs41_match_stateid(const nfs4_stateid *s1,
7809 const nfs4_stateid *s2)
7810 {
7811 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
7812 return false;
7813
7814 if (s1->seqid == s2->seqid)
7815 return true;
7816 if (s1->seqid == 0 || s2->seqid == 0)
7817 return true;
7818
7819 return false;
7820 }
7821
7822 #endif /* CONFIG_NFS_V4_1 */
7823
7824 static bool nfs4_match_stateid(const nfs4_stateid *s1,
7825 const nfs4_stateid *s2)
7826 {
7827 return nfs4_stateid_match(s1, s2);
7828 }
7829
7830
7831 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7832 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7833 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7834 .recover_open = nfs4_open_reclaim,
7835 .recover_lock = nfs4_lock_reclaim,
7836 .establish_clid = nfs4_init_clientid,
7837 .detect_trunking = nfs40_discover_server_trunking,
7838 };
7839
7840 #if defined(CONFIG_NFS_V4_1)
7841 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
7842 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7843 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7844 .recover_open = nfs4_open_reclaim,
7845 .recover_lock = nfs4_lock_reclaim,
7846 .establish_clid = nfs41_init_clientid,
7847 .reclaim_complete = nfs41_proc_reclaim_complete,
7848 .detect_trunking = nfs41_discover_server_trunking,
7849 };
7850 #endif /* CONFIG_NFS_V4_1 */
7851
7852 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7853 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7854 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7855 .recover_open = nfs4_open_expired,
7856 .recover_lock = nfs4_lock_expired,
7857 .establish_clid = nfs4_init_clientid,
7858 };
7859
7860 #if defined(CONFIG_NFS_V4_1)
7861 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7862 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7863 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7864 .recover_open = nfs41_open_expired,
7865 .recover_lock = nfs41_lock_expired,
7866 .establish_clid = nfs41_init_clientid,
7867 };
7868 #endif /* CONFIG_NFS_V4_1 */
7869
7870 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7871 .sched_state_renewal = nfs4_proc_async_renew,
7872 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7873 .renew_lease = nfs4_proc_renew,
7874 };
7875
7876 #if defined(CONFIG_NFS_V4_1)
7877 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7878 .sched_state_renewal = nfs41_proc_async_sequence,
7879 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7880 .renew_lease = nfs4_proc_sequence,
7881 };
7882 #endif
7883
7884 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7885 .minor_version = 0,
7886 .init_caps = NFS_CAP_READDIRPLUS
7887 | NFS_CAP_ATOMIC_OPEN
7888 | NFS_CAP_CHANGE_ATTR
7889 | NFS_CAP_POSIX_LOCK,
7890 .init_client = nfs40_init_client,
7891 .shutdown_client = nfs40_shutdown_client,
7892 .match_stateid = nfs4_match_stateid,
7893 .find_root_sec = nfs4_find_root_sec,
7894 .free_lock_state = nfs4_release_lockowner,
7895 .call_sync_ops = &nfs40_call_sync_ops,
7896 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7897 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7898 .state_renewal_ops = &nfs40_state_renewal_ops,
7899 };
7900
7901 #if defined(CONFIG_NFS_V4_1)
7902 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7903 .minor_version = 1,
7904 .init_caps = NFS_CAP_READDIRPLUS
7905 | NFS_CAP_ATOMIC_OPEN
7906 | NFS_CAP_CHANGE_ATTR
7907 | NFS_CAP_POSIX_LOCK
7908 | NFS_CAP_STATEID_NFSV41
7909 | NFS_CAP_ATOMIC_OPEN_V1,
7910 .init_client = nfs41_init_client,
7911 .shutdown_client = nfs41_shutdown_client,
7912 .match_stateid = nfs41_match_stateid,
7913 .find_root_sec = nfs41_find_root_sec,
7914 .free_lock_state = nfs41_free_lock_state,
7915 .call_sync_ops = &nfs41_call_sync_ops,
7916 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7917 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7918 .state_renewal_ops = &nfs41_state_renewal_ops,
7919 };
7920 #endif
7921
7922 #if defined(CONFIG_NFS_V4_2)
7923 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7924 .minor_version = 2,
7925 .init_caps = NFS_CAP_READDIRPLUS
7926 | NFS_CAP_ATOMIC_OPEN
7927 | NFS_CAP_CHANGE_ATTR
7928 | NFS_CAP_POSIX_LOCK
7929 | NFS_CAP_STATEID_NFSV41
7930 | NFS_CAP_ATOMIC_OPEN_V1,
7931 .init_client = nfs41_init_client,
7932 .shutdown_client = nfs41_shutdown_client,
7933 .match_stateid = nfs41_match_stateid,
7934 .find_root_sec = nfs41_find_root_sec,
7935 .free_lock_state = nfs41_free_lock_state,
7936 .call_sync_ops = &nfs41_call_sync_ops,
7937 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7938 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7939 .state_renewal_ops = &nfs41_state_renewal_ops,
7940 };
7941 #endif
7942
7943 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7944 [0] = &nfs_v4_0_minor_ops,
7945 #if defined(CONFIG_NFS_V4_1)
7946 [1] = &nfs_v4_1_minor_ops,
7947 #endif
7948 #if defined(CONFIG_NFS_V4_2)
7949 [2] = &nfs_v4_2_minor_ops,
7950 #endif
7951 };
7952
7953 static const struct inode_operations nfs4_dir_inode_operations = {
7954 .create = nfs_create,
7955 .lookup = nfs_lookup,
7956 .atomic_open = nfs_atomic_open,
7957 .link = nfs_link,
7958 .unlink = nfs_unlink,
7959 .symlink = nfs_symlink,
7960 .mkdir = nfs_mkdir,
7961 .rmdir = nfs_rmdir,
7962 .mknod = nfs_mknod,
7963 .rename = nfs_rename,
7964 .permission = nfs_permission,
7965 .getattr = nfs_getattr,
7966 .setattr = nfs_setattr,
7967 .getxattr = generic_getxattr,
7968 .setxattr = generic_setxattr,
7969 .listxattr = generic_listxattr,
7970 .removexattr = generic_removexattr,
7971 };
7972
7973 static const struct inode_operations nfs4_file_inode_operations = {
7974 .permission = nfs_permission,
7975 .getattr = nfs_getattr,
7976 .setattr = nfs_setattr,
7977 .getxattr = generic_getxattr,
7978 .setxattr = generic_setxattr,
7979 .listxattr = generic_listxattr,
7980 .removexattr = generic_removexattr,
7981 };
7982
7983 const struct nfs_rpc_ops nfs_v4_clientops = {
7984 .version = 4, /* protocol version */
7985 .dentry_ops = &nfs4_dentry_operations,
7986 .dir_inode_ops = &nfs4_dir_inode_operations,
7987 .file_inode_ops = &nfs4_file_inode_operations,
7988 .file_ops = &nfs4_file_operations,
7989 .getroot = nfs4_proc_get_root,
7990 .submount = nfs4_submount,
7991 .try_mount = nfs4_try_mount,
7992 .getattr = nfs4_proc_getattr,
7993 .setattr = nfs4_proc_setattr,
7994 .lookup = nfs4_proc_lookup,
7995 .access = nfs4_proc_access,
7996 .readlink = nfs4_proc_readlink,
7997 .create = nfs4_proc_create,
7998 .remove = nfs4_proc_remove,
7999 .unlink_setup = nfs4_proc_unlink_setup,
8000 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8001 .unlink_done = nfs4_proc_unlink_done,
8002 .rename = nfs4_proc_rename,
8003 .rename_setup = nfs4_proc_rename_setup,
8004 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8005 .rename_done = nfs4_proc_rename_done,
8006 .link = nfs4_proc_link,
8007 .symlink = nfs4_proc_symlink,
8008 .mkdir = nfs4_proc_mkdir,
8009 .rmdir = nfs4_proc_remove,
8010 .readdir = nfs4_proc_readdir,
8011 .mknod = nfs4_proc_mknod,
8012 .statfs = nfs4_proc_statfs,
8013 .fsinfo = nfs4_proc_fsinfo,
8014 .pathconf = nfs4_proc_pathconf,
8015 .set_capabilities = nfs4_server_capabilities,
8016 .decode_dirent = nfs4_decode_dirent,
8017 .read_setup = nfs4_proc_read_setup,
8018 .read_pageio_init = pnfs_pageio_init_read,
8019 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
8020 .read_done = nfs4_read_done,
8021 .write_setup = nfs4_proc_write_setup,
8022 .write_pageio_init = pnfs_pageio_init_write,
8023 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
8024 .write_done = nfs4_write_done,
8025 .commit_setup = nfs4_proc_commit_setup,
8026 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8027 .commit_done = nfs4_commit_done,
8028 .lock = nfs4_proc_lock,
8029 .clear_acl_cache = nfs4_zap_acl_attr,
8030 .close_context = nfs4_close_context,
8031 .open_context = nfs4_atomic_open,
8032 .have_delegation = nfs4_have_delegation,
8033 .return_delegation = nfs4_inode_return_delegation,
8034 .alloc_client = nfs4_alloc_client,
8035 .init_client = nfs4_init_client,
8036 .free_client = nfs4_free_client,
8037 .create_server = nfs4_create_server,
8038 .clone_server = nfs_clone_server,
8039 };
8040
8041 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8042 .prefix = XATTR_NAME_NFSV4_ACL,
8043 .list = nfs4_xattr_list_nfs4_acl,
8044 .get = nfs4_xattr_get_nfs4_acl,
8045 .set = nfs4_xattr_set_nfs4_acl,
8046 };
8047
8048 const struct xattr_handler *nfs4_xattr_handlers[] = {
8049 &nfs4_xattr_nfs4_acl_handler,
8050 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8051 &nfs4_xattr_nfs4_label_handler,
8052 #endif
8053 NULL
8054 };
8055
8056 /*
8057 * Local variables:
8058 * c-basic-offset: 8
8059 * End:
8060 */