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NFSv4.1: nfs4_opendata_check_deleg needs to handle NFS4_OPEN_CLAIM_DELEG_CUR_FH
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/file.h>
42#include <linux/string.h>
43#include <linux/ratelimit.h>
44#include <linux/printk.h>
45#include <linux/slab.h>
46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
51#include <linux/nfs_mount.h>
52#include <linux/namei.h>
53#include <linux/mount.h>
54#include <linux/module.h>
55#include <linux/xattr.h>
56#include <linux/utsname.h>
57#include <linux/freezer.h>
58
59#include "nfs4_fs.h"
60#include "delegation.h"
61#include "internal.h"
62#include "iostat.h"
63#include "callback.h"
64#include "pnfs.h"
65#include "netns.h"
66#include "nfs4idmap.h"
67#include "nfs4session.h"
68#include "fscache.h"
69
70#include "nfs4trace.h"
71
72#define NFSDBG_FACILITY NFSDBG_PROC
73
74#define NFS4_POLL_RETRY_MIN (HZ/10)
75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
77struct nfs4_opendata;
78static int _nfs4_proc_open(struct nfs4_opendata *data);
79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
89#ifdef CONFIG_NFS_V4_1
90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
94#endif
95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
142/* Prevent leaks of NFSv4 errors into userland */
143static int nfs4_map_errors(int err)
144{
145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
151 return -EREMOTEIO;
152 case -NFS4ERR_WRONGSEC:
153 case -NFS4ERR_WRONG_CRED:
154 return -EPERM;
155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
164 default:
165 dprintk("%s could not handle NFSv4 error %d\n",
166 __func__, -err);
167 break;
168 }
169 return -EIO;
170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
175const u32 nfs4_fattr_bitmap[3] = {
176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
194};
195
196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
220const u32 nfs4_statfs_bitmap[3] = {
221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
229const u32 nfs4_pathconf_bitmap[3] = {
230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
239 FATTR4_WORD1_TIME_DELTA
240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
242};
243
244const u32 nfs4_fs_locations_bitmap[3] = {
245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
261};
262
263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
264 struct nfs4_readdir_arg *readdir)
265{
266 __be32 *start, *p;
267
268 if (cookie > 2) {
269 readdir->cookie = cookie;
270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
286 start = p = kmap_atomic(*readdir->pages);
287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
315}
316
317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
348{
349 struct nfs_client *clp = server->nfs_client;
350 struct nfs4_state *state = exception->state;
351 struct inode *inode = exception->inode;
352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
358 case -NFS4ERR_OPENMODE:
359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
363 nfs4_inode_return_delegation(inode);
364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
372 goto wait_on_recovery;
373 case -NFS4ERR_EXPIRED:
374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
379 case -NFS4ERR_STALE_STATEID:
380 case -NFS4ERR_STALE_CLIENTID:
381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
391#if defined(CONFIG_NFS_V4_1)
392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
402 goto wait_on_recovery;
403#endif /* defined(CONFIG_NFS_V4_1) */
404 case -NFS4ERR_FILE_OPEN:
405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
417 case -NFS4ERR_RETRY_UNCACHED_REP:
418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
436wait_on_recovery:
437 ret = nfs4_wait_clnt_recover(clp);
438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
443}
444
445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
459
460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
461{
462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
474}
475
476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
501{
502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
544 if (slot == NULL)
545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
558#if defined(CONFIG_NFS_V4_1)
559
560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
561{
562 struct nfs4_session *session;
563 struct nfs4_slot_table *tbl;
564 struct nfs4_slot *slot = res->sr_slot;
565 bool send_new_highest_used_slotid = false;
566
567 tbl = slot->table;
568 session = tbl->session;
569
570 spin_lock(&tbl->slot_tbl_lock);
571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
581 nfs4_free_slot(tbl, slot);
582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
585out_unlock:
586 spin_unlock(&tbl->slot_tbl_lock);
587 res->sr_slot = NULL;
588 if (send_new_highest_used_slotid)
589 nfs41_notify_server(session->clp);
590}
591
592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
593{
594 struct nfs4_session *session;
595 struct nfs4_slot *slot = res->sr_slot;
596 struct nfs_client *clp;
597 bool interrupted = false;
598 int ret = 1;
599
600 if (slot == NULL)
601 goto out_noaction;
602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
604 goto out;
605
606 session = slot->table->session;
607
608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
613 trace_nfs4_sequence_done(session, res);
614 /* Check the SEQUENCE operation status */
615 switch (res->sr_status) {
616 case 0:
617 /* Update the slot's sequence and clientid lease timer */
618 ++slot->seq_nr;
619 clp = session->clp;
620 do_renew_lease(clp, res->sr_timestamp);
621 /* Check sequence flags */
622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
623 nfs41_update_target_slotid(slot->table, slot, res);
624 break;
625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
640 __func__,
641 slot->slot_nr,
642 slot->seq_nr);
643 goto out_retry;
644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
671 default:
672 /* Just update the slot sequence no. */
673 ++slot->seq_nr;
674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
678 nfs41_sequence_free_slot(res);
679out_noaction:
680 return ret;
681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
687out_retry:
688 if (!rpc_restart_call(task))
689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
692}
693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
694
695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
696{
697 if (res->sr_slot == NULL)
698 return 1;
699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
701 return nfs41_sequence_done(task, res);
702}
703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
704
705int nfs41_setup_sequence(struct nfs4_session *session,
706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
708 struct rpc_task *task)
709{
710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
712
713 dprintk("--> %s\n", __func__);
714 /* slot already allocated? */
715 if (res->sr_slot != NULL)
716 goto out_success;
717
718 tbl = &session->fc_slot_table;
719
720 task->tk_timeout = 0;
721
722 spin_lock(&tbl->slot_tbl_lock);
723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
724 !args->sa_privileged) {
725 /* The state manager will wait until the slot table is empty */
726 dprintk("%s session is draining\n", __func__);
727 goto out_sleep;
728 }
729
730 slot = nfs4_alloc_slot(tbl);
731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
735 dprintk("<-- %s: no free slots\n", __func__);
736 goto out_sleep;
737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
740 args->sa_slot = slot;
741
742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
743 slot->slot_nr, slot->seq_nr);
744
745 res->sr_slot = slot;
746 res->sr_timestamp = jiffies;
747 res->sr_status_flags = 0;
748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
753 trace_nfs4_setup_sequence(session, args);
754out_success:
755 rpc_call_start(task);
756 return 0;
757out_sleep:
758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
766}
767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
768
769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
773{
774 struct nfs4_session *session = nfs4_get_session(server);
775 int ret = 0;
776
777 if (!session)
778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
780
781 dprintk("--> %s clp %p session %p sr_slot %u\n",
782 __func__, session->clp, session, res->sr_slot ?
783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
784
785 ret = nfs41_setup_sequence(session, args, res, task);
786
787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
793 struct nfs4_call_sync_data *data = calldata;
794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
795
796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
799}
800
801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
803 struct nfs4_call_sync_data *data = calldata;
804
805 nfs41_sequence_done(task, data->seq_res);
806}
807
808static const struct rpc_call_ops nfs41_call_sync_ops = {
809 .rpc_call_prepare = nfs41_call_sync_prepare,
810 .rpc_call_done = nfs41_call_sync_done,
811};
812
813#else /* !CONFIG_NFS_V4_1 */
814
815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
822}
823
824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
826{
827 return nfs40_sequence_done(task, res);
828}
829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
830
831#endif /* !CONFIG_NFS_V4_1 */
832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
855 struct nfs4_sequence_res *res)
856{
857 int ret;
858 struct rpc_task *task;
859 struct nfs_client *clp = server->nfs_client;
860 struct nfs4_call_sync_data data = {
861 .seq_server = server,
862 .seq_args = args,
863 .seq_res = res,
864 };
865 struct rpc_task_setup task_setup = {
866 .rpc_client = clnt,
867 .rpc_message = msg,
868 .callback_ops = clp->cl_mvops->call_sync_ops,
869 .callback_data = &data
870 };
871
872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
889 nfs4_init_sequence(args, res, cache_reply);
890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
891}
892
893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
894{
895 struct nfs_inode *nfsi = NFS_I(dir);
896
897 spin_lock(&dir->i_lock);
898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
899 if (!cinfo->atomic || cinfo->before != dir->i_version)
900 nfs_force_lookup_revalidate(dir);
901 dir->i_version = cinfo->after;
902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
903 nfs_fscache_invalidate(dir);
904 spin_unlock(&dir->i_lock);
905}
906
907struct nfs4_opendata {
908 struct kref kref;
909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
915 struct nfs4_label *a_label;
916 struct nfs_fattr f_attr;
917 struct nfs4_label *f_label;
918 struct dentry *dir;
919 struct dentry *dentry;
920 struct nfs4_state_owner *owner;
921 struct nfs4_state *state;
922 struct iattr attrs;
923 unsigned long timestamp;
924 unsigned int rpc_done : 1;
925 unsigned int file_created : 1;
926 unsigned int is_recover : 1;
927 int rpc_status;
928 int cancelled;
929};
930
931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
989 p->o_res.f_label = p->f_label;
990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
992 p->o_res.server = p->o_arg.server;
993 p->o_res.access_request = p->o_arg.access;
994 nfs_fattr_init(&p->f_attr);
995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
996}
997
998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1000 const struct iattr *attrs,
1001 struct nfs4_label *label,
1002 enum open_claim_type4 claim,
1003 gfp_t gfp_mask)
1004{
1005 struct dentry *parent = dget_parent(dentry);
1006 struct inode *dir = d_inode(parent);
1007 struct nfs_server *server = NFS_SERVER(dir);
1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1009 struct nfs4_opendata *p;
1010
1011 p = kzalloc(sizeof(*p), gfp_mask);
1012 if (p == NULL)
1013 goto err;
1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1025 if (IS_ERR(p->o_arg.seqid))
1026 goto err_free_label;
1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1043 }
1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1047 p->o_arg.name = &dentry->d_name;
1048 p->o_arg.server = server;
1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
1064 }
1065 if (attrs != NULL && attrs->ia_valid != 0) {
1066 __u32 verf[2];
1067
1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
1075 }
1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
1079 nfs4_init_opendata_res(p);
1080 kref_init(&p->kref);
1081 return p;
1082
1083err_free_label:
1084 nfs4_label_free(p->a_label);
1085err_free_f:
1086 nfs4_label_free(p->f_label);
1087err_free_p:
1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
1094static void nfs4_opendata_free(struct kref *kref)
1095{
1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
1098 struct super_block *sb = p->dentry->d_sb;
1099
1100 nfs_free_seqid(p->o_arg.seqid);
1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
1103 nfs4_put_state_owner(p->owner);
1104
1105 nfs4_label_free(p->a_label);
1106 nfs4_label_free(p->f_label);
1107
1108 dput(p->dir);
1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
1111 nfs_fattr_free_names(&p->f_attr);
1112 kfree(p->f_attr.mdsthreshold);
1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
1120}
1121
1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
1124 int ret;
1125
1126 ret = rpc_wait_for_completion_task(task);
1127 return ret;
1128}
1129
1130static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1131 fmode_t fmode)
1132{
1133 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1134 case FMODE_READ|FMODE_WRITE:
1135 return state->n_rdwr != 0;
1136 case FMODE_WRITE:
1137 return state->n_wronly != 0;
1138 case FMODE_READ:
1139 return state->n_rdonly != 0;
1140 }
1141 WARN_ON_ONCE(1);
1142 return false;
1143}
1144
1145static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1146{
1147 int ret = 0;
1148
1149 if (open_mode & (O_EXCL|O_TRUNC))
1150 goto out;
1151 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1152 case FMODE_READ:
1153 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1154 && state->n_rdonly != 0;
1155 break;
1156 case FMODE_WRITE:
1157 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1158 && state->n_wronly != 0;
1159 break;
1160 case FMODE_READ|FMODE_WRITE:
1161 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1162 && state->n_rdwr != 0;
1163 }
1164out:
1165 return ret;
1166}
1167
1168static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1169 enum open_claim_type4 claim)
1170{
1171 if (delegation == NULL)
1172 return 0;
1173 if ((delegation->type & fmode) != fmode)
1174 return 0;
1175 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1176 return 0;
1177 switch (claim) {
1178 case NFS4_OPEN_CLAIM_NULL:
1179 case NFS4_OPEN_CLAIM_FH:
1180 break;
1181 case NFS4_OPEN_CLAIM_PREVIOUS:
1182 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1183 break;
1184 default:
1185 return 0;
1186 }
1187 nfs_mark_delegation_referenced(delegation);
1188 return 1;
1189}
1190
1191static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1192{
1193 switch (fmode) {
1194 case FMODE_WRITE:
1195 state->n_wronly++;
1196 break;
1197 case FMODE_READ:
1198 state->n_rdonly++;
1199 break;
1200 case FMODE_READ|FMODE_WRITE:
1201 state->n_rdwr++;
1202 }
1203 nfs4_state_set_mode_locked(state, state->state | fmode);
1204}
1205
1206static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1207{
1208 struct nfs_client *clp = state->owner->so_server->nfs_client;
1209 bool need_recover = false;
1210
1211 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1212 need_recover = true;
1213 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1214 need_recover = true;
1215 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1216 need_recover = true;
1217 if (need_recover)
1218 nfs4_state_mark_reclaim_nograce(clp, state);
1219}
1220
1221static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1222 nfs4_stateid *stateid)
1223{
1224 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1225 return true;
1226 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1227 nfs_test_and_clear_all_open_stateid(state);
1228 return true;
1229 }
1230 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1231 return true;
1232 return false;
1233}
1234
1235static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1236{
1237 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1238 return;
1239 if (state->n_wronly)
1240 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1241 if (state->n_rdonly)
1242 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1243 if (state->n_rdwr)
1244 set_bit(NFS_O_RDWR_STATE, &state->flags);
1245 set_bit(NFS_OPEN_STATE, &state->flags);
1246}
1247
1248static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1249 nfs4_stateid *arg_stateid,
1250 nfs4_stateid *stateid, fmode_t fmode)
1251{
1252 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1253 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1254 case FMODE_WRITE:
1255 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1256 break;
1257 case FMODE_READ:
1258 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1259 break;
1260 case 0:
1261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1263 clear_bit(NFS_OPEN_STATE, &state->flags);
1264 }
1265 if (stateid == NULL)
1266 return;
1267 /* Handle races with OPEN */
1268 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1269 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1270 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
1271 nfs_resync_open_stateid_locked(state);
1272 return;
1273 }
1274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1275 nfs4_stateid_copy(&state->stateid, stateid);
1276 nfs4_stateid_copy(&state->open_stateid, stateid);
1277}
1278
1279static void nfs_clear_open_stateid(struct nfs4_state *state,
1280 nfs4_stateid *arg_stateid,
1281 nfs4_stateid *stateid, fmode_t fmode)
1282{
1283 write_seqlock(&state->seqlock);
1284 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
1285 write_sequnlock(&state->seqlock);
1286 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1287 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1288}
1289
1290static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1291{
1292 switch (fmode) {
1293 case FMODE_READ:
1294 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1295 break;
1296 case FMODE_WRITE:
1297 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1298 break;
1299 case FMODE_READ|FMODE_WRITE:
1300 set_bit(NFS_O_RDWR_STATE, &state->flags);
1301 }
1302 if (!nfs_need_update_open_stateid(state, stateid))
1303 return;
1304 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1305 nfs4_stateid_copy(&state->stateid, stateid);
1306 nfs4_stateid_copy(&state->open_stateid, stateid);
1307}
1308
1309static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1310{
1311 /*
1312 * Protect the call to nfs4_state_set_mode_locked and
1313 * serialise the stateid update
1314 */
1315 write_seqlock(&state->seqlock);
1316 if (deleg_stateid != NULL) {
1317 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1318 set_bit(NFS_DELEGATED_STATE, &state->flags);
1319 }
1320 if (open_stateid != NULL)
1321 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1322 write_sequnlock(&state->seqlock);
1323 spin_lock(&state->owner->so_lock);
1324 update_open_stateflags(state, fmode);
1325 spin_unlock(&state->owner->so_lock);
1326}
1327
1328static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1329{
1330 struct nfs_inode *nfsi = NFS_I(state->inode);
1331 struct nfs_delegation *deleg_cur;
1332 int ret = 0;
1333
1334 fmode &= (FMODE_READ|FMODE_WRITE);
1335
1336 rcu_read_lock();
1337 deleg_cur = rcu_dereference(nfsi->delegation);
1338 if (deleg_cur == NULL)
1339 goto no_delegation;
1340
1341 spin_lock(&deleg_cur->lock);
1342 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1343 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1344 (deleg_cur->type & fmode) != fmode)
1345 goto no_delegation_unlock;
1346
1347 if (delegation == NULL)
1348 delegation = &deleg_cur->stateid;
1349 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1350 goto no_delegation_unlock;
1351
1352 nfs_mark_delegation_referenced(deleg_cur);
1353 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1354 ret = 1;
1355no_delegation_unlock:
1356 spin_unlock(&deleg_cur->lock);
1357no_delegation:
1358 rcu_read_unlock();
1359
1360 if (!ret && open_stateid != NULL) {
1361 __update_open_stateid(state, open_stateid, NULL, fmode);
1362 ret = 1;
1363 }
1364 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1365 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1366
1367 return ret;
1368}
1369
1370static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1371 const nfs4_stateid *stateid)
1372{
1373 struct nfs4_state *state = lsp->ls_state;
1374 bool ret = false;
1375
1376 spin_lock(&state->state_lock);
1377 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1378 goto out_noupdate;
1379 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1380 goto out_noupdate;
1381 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1382 ret = true;
1383out_noupdate:
1384 spin_unlock(&state->state_lock);
1385 return ret;
1386}
1387
1388static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1389{
1390 struct nfs_delegation *delegation;
1391
1392 rcu_read_lock();
1393 delegation = rcu_dereference(NFS_I(inode)->delegation);
1394 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1395 rcu_read_unlock();
1396 return;
1397 }
1398 rcu_read_unlock();
1399 nfs4_inode_return_delegation(inode);
1400}
1401
1402static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1403{
1404 struct nfs4_state *state = opendata->state;
1405 struct nfs_inode *nfsi = NFS_I(state->inode);
1406 struct nfs_delegation *delegation;
1407 int open_mode = opendata->o_arg.open_flags;
1408 fmode_t fmode = opendata->o_arg.fmode;
1409 enum open_claim_type4 claim = opendata->o_arg.claim;
1410 nfs4_stateid stateid;
1411 int ret = -EAGAIN;
1412
1413 for (;;) {
1414 spin_lock(&state->owner->so_lock);
1415 if (can_open_cached(state, fmode, open_mode)) {
1416 update_open_stateflags(state, fmode);
1417 spin_unlock(&state->owner->so_lock);
1418 goto out_return_state;
1419 }
1420 spin_unlock(&state->owner->so_lock);
1421 rcu_read_lock();
1422 delegation = rcu_dereference(nfsi->delegation);
1423 if (!can_open_delegated(delegation, fmode, claim)) {
1424 rcu_read_unlock();
1425 break;
1426 }
1427 /* Save the delegation */
1428 nfs4_stateid_copy(&stateid, &delegation->stateid);
1429 rcu_read_unlock();
1430 nfs_release_seqid(opendata->o_arg.seqid);
1431 if (!opendata->is_recover) {
1432 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1433 if (ret != 0)
1434 goto out;
1435 }
1436 ret = -EAGAIN;
1437
1438 /* Try to update the stateid using the delegation */
1439 if (update_open_stateid(state, NULL, &stateid, fmode))
1440 goto out_return_state;
1441 }
1442out:
1443 return ERR_PTR(ret);
1444out_return_state:
1445 atomic_inc(&state->count);
1446 return state;
1447}
1448
1449static void
1450nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1451{
1452 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1453 struct nfs_delegation *delegation;
1454 int delegation_flags = 0;
1455
1456 rcu_read_lock();
1457 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1458 if (delegation)
1459 delegation_flags = delegation->flags;
1460 rcu_read_unlock();
1461 switch (data->o_arg.claim) {
1462 default:
1463 break;
1464 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1465 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1466 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1467 "returning a delegation for "
1468 "OPEN(CLAIM_DELEGATE_CUR)\n",
1469 clp->cl_hostname);
1470 return;
1471 }
1472 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1473 nfs_inode_set_delegation(state->inode,
1474 data->owner->so_cred,
1475 &data->o_res);
1476 else
1477 nfs_inode_reclaim_delegation(state->inode,
1478 data->owner->so_cred,
1479 &data->o_res);
1480}
1481
1482/*
1483 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1484 * and update the nfs4_state.
1485 */
1486static struct nfs4_state *
1487_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1488{
1489 struct inode *inode = data->state->inode;
1490 struct nfs4_state *state = data->state;
1491 int ret;
1492
1493 if (!data->rpc_done) {
1494 if (data->rpc_status) {
1495 ret = data->rpc_status;
1496 goto err;
1497 }
1498 /* cached opens have already been processed */
1499 goto update;
1500 }
1501
1502 ret = nfs_refresh_inode(inode, &data->f_attr);
1503 if (ret)
1504 goto err;
1505
1506 if (data->o_res.delegation_type != 0)
1507 nfs4_opendata_check_deleg(data, state);
1508update:
1509 update_open_stateid(state, &data->o_res.stateid, NULL,
1510 data->o_arg.fmode);
1511 atomic_inc(&state->count);
1512
1513 return state;
1514err:
1515 return ERR_PTR(ret);
1516
1517}
1518
1519static struct nfs4_state *
1520_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1521{
1522 struct inode *inode;
1523 struct nfs4_state *state = NULL;
1524 int ret;
1525
1526 if (!data->rpc_done) {
1527 state = nfs4_try_open_cached(data);
1528 goto out;
1529 }
1530
1531 ret = -EAGAIN;
1532 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1533 goto err;
1534 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1535 ret = PTR_ERR(inode);
1536 if (IS_ERR(inode))
1537 goto err;
1538 ret = -ENOMEM;
1539 state = nfs4_get_open_state(inode, data->owner);
1540 if (state == NULL)
1541 goto err_put_inode;
1542 if (data->o_res.delegation_type != 0)
1543 nfs4_opendata_check_deleg(data, state);
1544 update_open_stateid(state, &data->o_res.stateid, NULL,
1545 data->o_arg.fmode);
1546 iput(inode);
1547out:
1548 nfs_release_seqid(data->o_arg.seqid);
1549 return state;
1550err_put_inode:
1551 iput(inode);
1552err:
1553 return ERR_PTR(ret);
1554}
1555
1556static struct nfs4_state *
1557nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1558{
1559 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1560 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1561 return _nfs4_opendata_to_nfs4_state(data);
1562}
1563
1564static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1565{
1566 struct nfs_inode *nfsi = NFS_I(state->inode);
1567 struct nfs_open_context *ctx;
1568
1569 spin_lock(&state->inode->i_lock);
1570 list_for_each_entry(ctx, &nfsi->open_files, list) {
1571 if (ctx->state != state)
1572 continue;
1573 get_nfs_open_context(ctx);
1574 spin_unlock(&state->inode->i_lock);
1575 return ctx;
1576 }
1577 spin_unlock(&state->inode->i_lock);
1578 return ERR_PTR(-ENOENT);
1579}
1580
1581static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1582 struct nfs4_state *state, enum open_claim_type4 claim)
1583{
1584 struct nfs4_opendata *opendata;
1585
1586 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1587 NULL, NULL, claim, GFP_NOFS);
1588 if (opendata == NULL)
1589 return ERR_PTR(-ENOMEM);
1590 opendata->state = state;
1591 atomic_inc(&state->count);
1592 return opendata;
1593}
1594
1595static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1596 fmode_t fmode)
1597{
1598 struct nfs4_state *newstate;
1599 int ret;
1600
1601 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1602 return 0;
1603 opendata->o_arg.open_flags = 0;
1604 opendata->o_arg.fmode = fmode;
1605 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1606 NFS_SB(opendata->dentry->d_sb),
1607 fmode, 0);
1608 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1609 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1610 nfs4_init_opendata_res(opendata);
1611 ret = _nfs4_recover_proc_open(opendata);
1612 if (ret != 0)
1613 return ret;
1614 newstate = nfs4_opendata_to_nfs4_state(opendata);
1615 if (IS_ERR(newstate))
1616 return PTR_ERR(newstate);
1617 if (newstate != opendata->state)
1618 ret = -ESTALE;
1619 nfs4_close_state(newstate, fmode);
1620 return ret;
1621}
1622
1623static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1624{
1625 int ret;
1626
1627 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1628 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1629 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1630 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1631 /* memory barrier prior to reading state->n_* */
1632 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1633 clear_bit(NFS_OPEN_STATE, &state->flags);
1634 smp_rmb();
1635 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1636 if (ret != 0)
1637 return ret;
1638 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1639 if (ret != 0)
1640 return ret;
1641 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1642 if (ret != 0)
1643 return ret;
1644 /*
1645 * We may have performed cached opens for all three recoveries.
1646 * Check if we need to update the current stateid.
1647 */
1648 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1649 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1650 write_seqlock(&state->seqlock);
1651 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1652 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1653 write_sequnlock(&state->seqlock);
1654 }
1655 return 0;
1656}
1657
1658/*
1659 * OPEN_RECLAIM:
1660 * reclaim state on the server after a reboot.
1661 */
1662static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1663{
1664 struct nfs_delegation *delegation;
1665 struct nfs4_opendata *opendata;
1666 fmode_t delegation_type = 0;
1667 int status;
1668
1669 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1670 NFS4_OPEN_CLAIM_PREVIOUS);
1671 if (IS_ERR(opendata))
1672 return PTR_ERR(opendata);
1673 rcu_read_lock();
1674 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1675 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1676 delegation_type = delegation->type;
1677 rcu_read_unlock();
1678 opendata->o_arg.u.delegation_type = delegation_type;
1679 status = nfs4_open_recover(opendata, state);
1680 nfs4_opendata_put(opendata);
1681 return status;
1682}
1683
1684static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1685{
1686 struct nfs_server *server = NFS_SERVER(state->inode);
1687 struct nfs4_exception exception = { };
1688 int err;
1689 do {
1690 err = _nfs4_do_open_reclaim(ctx, state);
1691 trace_nfs4_open_reclaim(ctx, 0, err);
1692 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1693 continue;
1694 if (err != -NFS4ERR_DELAY)
1695 break;
1696 nfs4_handle_exception(server, err, &exception);
1697 } while (exception.retry);
1698 return err;
1699}
1700
1701static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1702{
1703 struct nfs_open_context *ctx;
1704 int ret;
1705
1706 ctx = nfs4_state_find_open_context(state);
1707 if (IS_ERR(ctx))
1708 return -EAGAIN;
1709 ret = nfs4_do_open_reclaim(ctx, state);
1710 put_nfs_open_context(ctx);
1711 return ret;
1712}
1713
1714static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1715{
1716 switch (err) {
1717 default:
1718 printk(KERN_ERR "NFS: %s: unhandled error "
1719 "%d.\n", __func__, err);
1720 case 0:
1721 case -ENOENT:
1722 case -EAGAIN:
1723 case -ESTALE:
1724 break;
1725 case -NFS4ERR_BADSESSION:
1726 case -NFS4ERR_BADSLOT:
1727 case -NFS4ERR_BAD_HIGH_SLOT:
1728 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1729 case -NFS4ERR_DEADSESSION:
1730 set_bit(NFS_DELEGATED_STATE, &state->flags);
1731 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1732 return -EAGAIN;
1733 case -NFS4ERR_STALE_CLIENTID:
1734 case -NFS4ERR_STALE_STATEID:
1735 set_bit(NFS_DELEGATED_STATE, &state->flags);
1736 case -NFS4ERR_EXPIRED:
1737 /* Don't recall a delegation if it was lost */
1738 nfs4_schedule_lease_recovery(server->nfs_client);
1739 return -EAGAIN;
1740 case -NFS4ERR_MOVED:
1741 nfs4_schedule_migration_recovery(server);
1742 return -EAGAIN;
1743 case -NFS4ERR_LEASE_MOVED:
1744 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1745 return -EAGAIN;
1746 case -NFS4ERR_DELEG_REVOKED:
1747 case -NFS4ERR_ADMIN_REVOKED:
1748 case -NFS4ERR_BAD_STATEID:
1749 case -NFS4ERR_OPENMODE:
1750 nfs_inode_find_state_and_recover(state->inode,
1751 stateid);
1752 nfs4_schedule_stateid_recovery(server, state);
1753 return -EAGAIN;
1754 case -NFS4ERR_DELAY:
1755 case -NFS4ERR_GRACE:
1756 set_bit(NFS_DELEGATED_STATE, &state->flags);
1757 ssleep(1);
1758 return -EAGAIN;
1759 case -ENOMEM:
1760 case -NFS4ERR_DENIED:
1761 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1762 return 0;
1763 }
1764 return err;
1765}
1766
1767int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1768 struct nfs4_state *state, const nfs4_stateid *stateid,
1769 fmode_t type)
1770{
1771 struct nfs_server *server = NFS_SERVER(state->inode);
1772 struct nfs4_opendata *opendata;
1773 int err = 0;
1774
1775 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1776 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1777 if (IS_ERR(opendata))
1778 return PTR_ERR(opendata);
1779 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1780 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1781 switch (type & (FMODE_READ|FMODE_WRITE)) {
1782 case FMODE_READ|FMODE_WRITE:
1783 case FMODE_WRITE:
1784 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1785 if (err)
1786 break;
1787 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1788 if (err)
1789 break;
1790 case FMODE_READ:
1791 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1792 }
1793 nfs4_opendata_put(opendata);
1794 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1795}
1796
1797static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1798{
1799 struct nfs4_opendata *data = calldata;
1800
1801 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1802 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1803}
1804
1805static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1806{
1807 struct nfs4_opendata *data = calldata;
1808
1809 nfs40_sequence_done(task, &data->c_res.seq_res);
1810
1811 data->rpc_status = task->tk_status;
1812 if (data->rpc_status == 0) {
1813 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1814 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1815 renew_lease(data->o_res.server, data->timestamp);
1816 data->rpc_done = 1;
1817 }
1818}
1819
1820static void nfs4_open_confirm_release(void *calldata)
1821{
1822 struct nfs4_opendata *data = calldata;
1823 struct nfs4_state *state = NULL;
1824
1825 /* If this request hasn't been cancelled, do nothing */
1826 if (data->cancelled == 0)
1827 goto out_free;
1828 /* In case of error, no cleanup! */
1829 if (!data->rpc_done)
1830 goto out_free;
1831 state = nfs4_opendata_to_nfs4_state(data);
1832 if (!IS_ERR(state))
1833 nfs4_close_state(state, data->o_arg.fmode);
1834out_free:
1835 nfs4_opendata_put(data);
1836}
1837
1838static const struct rpc_call_ops nfs4_open_confirm_ops = {
1839 .rpc_call_prepare = nfs4_open_confirm_prepare,
1840 .rpc_call_done = nfs4_open_confirm_done,
1841 .rpc_release = nfs4_open_confirm_release,
1842};
1843
1844/*
1845 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1846 */
1847static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1848{
1849 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1850 struct rpc_task *task;
1851 struct rpc_message msg = {
1852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1853 .rpc_argp = &data->c_arg,
1854 .rpc_resp = &data->c_res,
1855 .rpc_cred = data->owner->so_cred,
1856 };
1857 struct rpc_task_setup task_setup_data = {
1858 .rpc_client = server->client,
1859 .rpc_message = &msg,
1860 .callback_ops = &nfs4_open_confirm_ops,
1861 .callback_data = data,
1862 .workqueue = nfsiod_workqueue,
1863 .flags = RPC_TASK_ASYNC,
1864 };
1865 int status;
1866
1867 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1868 kref_get(&data->kref);
1869 data->rpc_done = 0;
1870 data->rpc_status = 0;
1871 data->timestamp = jiffies;
1872 task = rpc_run_task(&task_setup_data);
1873 if (IS_ERR(task))
1874 return PTR_ERR(task);
1875 status = nfs4_wait_for_completion_rpc_task(task);
1876 if (status != 0) {
1877 data->cancelled = 1;
1878 smp_wmb();
1879 } else
1880 status = data->rpc_status;
1881 rpc_put_task(task);
1882 return status;
1883}
1884
1885static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1886{
1887 struct nfs4_opendata *data = calldata;
1888 struct nfs4_state_owner *sp = data->owner;
1889 struct nfs_client *clp = sp->so_server->nfs_client;
1890 enum open_claim_type4 claim = data->o_arg.claim;
1891
1892 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1893 goto out_wait;
1894 /*
1895 * Check if we still need to send an OPEN call, or if we can use
1896 * a delegation instead.
1897 */
1898 if (data->state != NULL) {
1899 struct nfs_delegation *delegation;
1900
1901 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1902 goto out_no_action;
1903 rcu_read_lock();
1904 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1905 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
1906 goto unlock_no_action;
1907 rcu_read_unlock();
1908 }
1909 /* Update client id. */
1910 data->o_arg.clientid = clp->cl_clientid;
1911 switch (claim) {
1912 default:
1913 break;
1914 case NFS4_OPEN_CLAIM_PREVIOUS:
1915 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1916 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1917 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1918 case NFS4_OPEN_CLAIM_FH:
1919 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1920 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1921 }
1922 data->timestamp = jiffies;
1923 if (nfs4_setup_sequence(data->o_arg.server,
1924 &data->o_arg.seq_args,
1925 &data->o_res.seq_res,
1926 task) != 0)
1927 nfs_release_seqid(data->o_arg.seqid);
1928
1929 /* Set the create mode (note dependency on the session type) */
1930 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1931 if (data->o_arg.open_flags & O_EXCL) {
1932 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1933 if (nfs4_has_persistent_session(clp))
1934 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1935 else if (clp->cl_mvops->minor_version > 0)
1936 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1937 }
1938 return;
1939unlock_no_action:
1940 rcu_read_unlock();
1941out_no_action:
1942 task->tk_action = NULL;
1943out_wait:
1944 nfs4_sequence_done(task, &data->o_res.seq_res);
1945}
1946
1947static void nfs4_open_done(struct rpc_task *task, void *calldata)
1948{
1949 struct nfs4_opendata *data = calldata;
1950
1951 data->rpc_status = task->tk_status;
1952
1953 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1954 return;
1955
1956 if (task->tk_status == 0) {
1957 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1958 switch (data->o_res.f_attr->mode & S_IFMT) {
1959 case S_IFREG:
1960 break;
1961 case S_IFLNK:
1962 data->rpc_status = -ELOOP;
1963 break;
1964 case S_IFDIR:
1965 data->rpc_status = -EISDIR;
1966 break;
1967 default:
1968 data->rpc_status = -ENOTDIR;
1969 }
1970 }
1971 renew_lease(data->o_res.server, data->timestamp);
1972 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1973 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1974 }
1975 data->rpc_done = 1;
1976}
1977
1978static void nfs4_open_release(void *calldata)
1979{
1980 struct nfs4_opendata *data = calldata;
1981 struct nfs4_state *state = NULL;
1982
1983 /* If this request hasn't been cancelled, do nothing */
1984 if (data->cancelled == 0)
1985 goto out_free;
1986 /* In case of error, no cleanup! */
1987 if (data->rpc_status != 0 || !data->rpc_done)
1988 goto out_free;
1989 /* In case we need an open_confirm, no cleanup! */
1990 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1991 goto out_free;
1992 state = nfs4_opendata_to_nfs4_state(data);
1993 if (!IS_ERR(state))
1994 nfs4_close_state(state, data->o_arg.fmode);
1995out_free:
1996 nfs4_opendata_put(data);
1997}
1998
1999static const struct rpc_call_ops nfs4_open_ops = {
2000 .rpc_call_prepare = nfs4_open_prepare,
2001 .rpc_call_done = nfs4_open_done,
2002 .rpc_release = nfs4_open_release,
2003};
2004
2005static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2006{
2007 struct inode *dir = d_inode(data->dir);
2008 struct nfs_server *server = NFS_SERVER(dir);
2009 struct nfs_openargs *o_arg = &data->o_arg;
2010 struct nfs_openres *o_res = &data->o_res;
2011 struct rpc_task *task;
2012 struct rpc_message msg = {
2013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2014 .rpc_argp = o_arg,
2015 .rpc_resp = o_res,
2016 .rpc_cred = data->owner->so_cred,
2017 };
2018 struct rpc_task_setup task_setup_data = {
2019 .rpc_client = server->client,
2020 .rpc_message = &msg,
2021 .callback_ops = &nfs4_open_ops,
2022 .callback_data = data,
2023 .workqueue = nfsiod_workqueue,
2024 .flags = RPC_TASK_ASYNC,
2025 };
2026 int status;
2027
2028 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2029 kref_get(&data->kref);
2030 data->rpc_done = 0;
2031 data->rpc_status = 0;
2032 data->cancelled = 0;
2033 data->is_recover = 0;
2034 if (isrecover) {
2035 nfs4_set_sequence_privileged(&o_arg->seq_args);
2036 data->is_recover = 1;
2037 }
2038 task = rpc_run_task(&task_setup_data);
2039 if (IS_ERR(task))
2040 return PTR_ERR(task);
2041 status = nfs4_wait_for_completion_rpc_task(task);
2042 if (status != 0) {
2043 data->cancelled = 1;
2044 smp_wmb();
2045 } else
2046 status = data->rpc_status;
2047 rpc_put_task(task);
2048
2049 return status;
2050}
2051
2052static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2053{
2054 struct inode *dir = d_inode(data->dir);
2055 struct nfs_openres *o_res = &data->o_res;
2056 int status;
2057
2058 status = nfs4_run_open_task(data, 1);
2059 if (status != 0 || !data->rpc_done)
2060 return status;
2061
2062 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2063
2064 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2065 status = _nfs4_proc_open_confirm(data);
2066 if (status != 0)
2067 return status;
2068 }
2069
2070 return status;
2071}
2072
2073/*
2074 * Additional permission checks in order to distinguish between an
2075 * open for read, and an open for execute. This works around the
2076 * fact that NFSv4 OPEN treats read and execute permissions as being
2077 * the same.
2078 * Note that in the non-execute case, we want to turn off permission
2079 * checking if we just created a new file (POSIX open() semantics).
2080 */
2081static int nfs4_opendata_access(struct rpc_cred *cred,
2082 struct nfs4_opendata *opendata,
2083 struct nfs4_state *state, fmode_t fmode,
2084 int openflags)
2085{
2086 struct nfs_access_entry cache;
2087 u32 mask;
2088
2089 /* access call failed or for some reason the server doesn't
2090 * support any access modes -- defer access call until later */
2091 if (opendata->o_res.access_supported == 0)
2092 return 0;
2093
2094 mask = 0;
2095 /*
2096 * Use openflags to check for exec, because fmode won't
2097 * always have FMODE_EXEC set when file open for exec.
2098 */
2099 if (openflags & __FMODE_EXEC) {
2100 /* ONLY check for exec rights */
2101 mask = MAY_EXEC;
2102 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2103 mask = MAY_READ;
2104
2105 cache.cred = cred;
2106 cache.jiffies = jiffies;
2107 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2108 nfs_access_add_cache(state->inode, &cache);
2109
2110 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2111 return 0;
2112
2113 /* even though OPEN succeeded, access is denied. Close the file */
2114 nfs4_close_state(state, fmode);
2115 return -EACCES;
2116}
2117
2118/*
2119 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2120 */
2121static int _nfs4_proc_open(struct nfs4_opendata *data)
2122{
2123 struct inode *dir = d_inode(data->dir);
2124 struct nfs_server *server = NFS_SERVER(dir);
2125 struct nfs_openargs *o_arg = &data->o_arg;
2126 struct nfs_openres *o_res = &data->o_res;
2127 int status;
2128
2129 status = nfs4_run_open_task(data, 0);
2130 if (!data->rpc_done)
2131 return status;
2132 if (status != 0) {
2133 if (status == -NFS4ERR_BADNAME &&
2134 !(o_arg->open_flags & O_CREAT))
2135 return -ENOENT;
2136 return status;
2137 }
2138
2139 nfs_fattr_map_and_free_names(server, &data->f_attr);
2140
2141 if (o_arg->open_flags & O_CREAT) {
2142 update_changeattr(dir, &o_res->cinfo);
2143 if (o_arg->open_flags & O_EXCL)
2144 data->file_created = 1;
2145 else if (o_res->cinfo.before != o_res->cinfo.after)
2146 data->file_created = 1;
2147 }
2148 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2149 server->caps &= ~NFS_CAP_POSIX_LOCK;
2150 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2151 status = _nfs4_proc_open_confirm(data);
2152 if (status != 0)
2153 return status;
2154 }
2155 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2156 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2157 return 0;
2158}
2159
2160static int nfs4_recover_expired_lease(struct nfs_server *server)
2161{
2162 return nfs4_client_recover_expired_lease(server->nfs_client);
2163}
2164
2165/*
2166 * OPEN_EXPIRED:
2167 * reclaim state on the server after a network partition.
2168 * Assumes caller holds the appropriate lock
2169 */
2170static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2171{
2172 struct nfs4_opendata *opendata;
2173 int ret;
2174
2175 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2176 NFS4_OPEN_CLAIM_FH);
2177 if (IS_ERR(opendata))
2178 return PTR_ERR(opendata);
2179 ret = nfs4_open_recover(opendata, state);
2180 if (ret == -ESTALE)
2181 d_drop(ctx->dentry);
2182 nfs4_opendata_put(opendata);
2183 return ret;
2184}
2185
2186static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2187{
2188 struct nfs_server *server = NFS_SERVER(state->inode);
2189 struct nfs4_exception exception = { };
2190 int err;
2191
2192 do {
2193 err = _nfs4_open_expired(ctx, state);
2194 trace_nfs4_open_expired(ctx, 0, err);
2195 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2196 continue;
2197 switch (err) {
2198 default:
2199 goto out;
2200 case -NFS4ERR_GRACE:
2201 case -NFS4ERR_DELAY:
2202 nfs4_handle_exception(server, err, &exception);
2203 err = 0;
2204 }
2205 } while (exception.retry);
2206out:
2207 return err;
2208}
2209
2210static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2211{
2212 struct nfs_open_context *ctx;
2213 int ret;
2214
2215 ctx = nfs4_state_find_open_context(state);
2216 if (IS_ERR(ctx))
2217 return -EAGAIN;
2218 ret = nfs4_do_open_expired(ctx, state);
2219 put_nfs_open_context(ctx);
2220 return ret;
2221}
2222
2223static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2224{
2225 nfs_remove_bad_delegation(state->inode);
2226 write_seqlock(&state->seqlock);
2227 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2228 write_sequnlock(&state->seqlock);
2229 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2230}
2231
2232static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2233{
2234 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2235 nfs_finish_clear_delegation_stateid(state);
2236}
2237
2238static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2239{
2240 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2241 nfs40_clear_delegation_stateid(state);
2242 return nfs4_open_expired(sp, state);
2243}
2244
2245#if defined(CONFIG_NFS_V4_1)
2246static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2247{
2248 struct nfs_server *server = NFS_SERVER(state->inode);
2249 nfs4_stateid stateid;
2250 struct nfs_delegation *delegation;
2251 struct rpc_cred *cred;
2252 int status;
2253
2254 /* Get the delegation credential for use by test/free_stateid */
2255 rcu_read_lock();
2256 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2257 if (delegation == NULL) {
2258 rcu_read_unlock();
2259 return;
2260 }
2261
2262 nfs4_stateid_copy(&stateid, &delegation->stateid);
2263 cred = get_rpccred(delegation->cred);
2264 rcu_read_unlock();
2265 status = nfs41_test_stateid(server, &stateid, cred);
2266 trace_nfs4_test_delegation_stateid(state, NULL, status);
2267
2268 if (status != NFS_OK) {
2269 /* Free the stateid unless the server explicitly
2270 * informs us the stateid is unrecognized. */
2271 if (status != -NFS4ERR_BAD_STATEID)
2272 nfs41_free_stateid(server, &stateid, cred);
2273 nfs_finish_clear_delegation_stateid(state);
2274 }
2275
2276 put_rpccred(cred);
2277}
2278
2279/**
2280 * nfs41_check_open_stateid - possibly free an open stateid
2281 *
2282 * @state: NFSv4 state for an inode
2283 *
2284 * Returns NFS_OK if recovery for this stateid is now finished.
2285 * Otherwise a negative NFS4ERR value is returned.
2286 */
2287static int nfs41_check_open_stateid(struct nfs4_state *state)
2288{
2289 struct nfs_server *server = NFS_SERVER(state->inode);
2290 nfs4_stateid *stateid = &state->open_stateid;
2291 struct rpc_cred *cred = state->owner->so_cred;
2292 int status;
2293
2294 /* If a state reset has been done, test_stateid is unneeded */
2295 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2296 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2297 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2298 return -NFS4ERR_BAD_STATEID;
2299
2300 status = nfs41_test_stateid(server, stateid, cred);
2301 trace_nfs4_test_open_stateid(state, NULL, status);
2302 if (status != NFS_OK) {
2303 /* Free the stateid unless the server explicitly
2304 * informs us the stateid is unrecognized. */
2305 if (status != -NFS4ERR_BAD_STATEID)
2306 nfs41_free_stateid(server, stateid, cred);
2307
2308 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2309 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2310 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2311 clear_bit(NFS_OPEN_STATE, &state->flags);
2312 }
2313 return status;
2314}
2315
2316static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2317{
2318 int status;
2319
2320 nfs41_check_delegation_stateid(state);
2321 status = nfs41_check_open_stateid(state);
2322 if (status != NFS_OK)
2323 status = nfs4_open_expired(sp, state);
2324 return status;
2325}
2326#endif
2327
2328/*
2329 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2330 * fields corresponding to attributes that were used to store the verifier.
2331 * Make sure we clobber those fields in the later setattr call
2332 */
2333static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2334 struct iattr *sattr, struct nfs4_label **label)
2335{
2336 const u32 *attrset = opendata->o_res.attrset;
2337
2338 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2339 !(sattr->ia_valid & ATTR_ATIME_SET))
2340 sattr->ia_valid |= ATTR_ATIME;
2341
2342 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2343 !(sattr->ia_valid & ATTR_MTIME_SET))
2344 sattr->ia_valid |= ATTR_MTIME;
2345
2346 /* Except MODE, it seems harmless of setting twice. */
2347 if ((attrset[1] & FATTR4_WORD1_MODE))
2348 sattr->ia_valid &= ~ATTR_MODE;
2349
2350 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2351 *label = NULL;
2352}
2353
2354static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2355 fmode_t fmode,
2356 int flags,
2357 struct nfs_open_context *ctx)
2358{
2359 struct nfs4_state_owner *sp = opendata->owner;
2360 struct nfs_server *server = sp->so_server;
2361 struct dentry *dentry;
2362 struct nfs4_state *state;
2363 unsigned int seq;
2364 int ret;
2365
2366 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2367
2368 ret = _nfs4_proc_open(opendata);
2369 if (ret != 0)
2370 goto out;
2371
2372 state = nfs4_opendata_to_nfs4_state(opendata);
2373 ret = PTR_ERR(state);
2374 if (IS_ERR(state))
2375 goto out;
2376 if (server->caps & NFS_CAP_POSIX_LOCK)
2377 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2378
2379 dentry = opendata->dentry;
2380 if (d_really_is_negative(dentry)) {
2381 /* FIXME: Is this d_drop() ever needed? */
2382 d_drop(dentry);
2383 dentry = d_add_unique(dentry, igrab(state->inode));
2384 if (dentry == NULL) {
2385 dentry = opendata->dentry;
2386 } else if (dentry != ctx->dentry) {
2387 dput(ctx->dentry);
2388 ctx->dentry = dget(dentry);
2389 }
2390 nfs_set_verifier(dentry,
2391 nfs_save_change_attribute(d_inode(opendata->dir)));
2392 }
2393
2394 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2395 if (ret != 0)
2396 goto out;
2397
2398 ctx->state = state;
2399 if (d_inode(dentry) == state->inode) {
2400 nfs_inode_attach_open_context(ctx);
2401 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2402 nfs4_schedule_stateid_recovery(server, state);
2403 }
2404out:
2405 return ret;
2406}
2407
2408/*
2409 * Returns a referenced nfs4_state
2410 */
2411static int _nfs4_do_open(struct inode *dir,
2412 struct nfs_open_context *ctx,
2413 int flags,
2414 struct iattr *sattr,
2415 struct nfs4_label *label,
2416 int *opened)
2417{
2418 struct nfs4_state_owner *sp;
2419 struct nfs4_state *state = NULL;
2420 struct nfs_server *server = NFS_SERVER(dir);
2421 struct nfs4_opendata *opendata;
2422 struct dentry *dentry = ctx->dentry;
2423 struct rpc_cred *cred = ctx->cred;
2424 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2425 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2426 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2427 struct nfs4_label *olabel = NULL;
2428 int status;
2429
2430 /* Protect against reboot recovery conflicts */
2431 status = -ENOMEM;
2432 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2433 if (sp == NULL) {
2434 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2435 goto out_err;
2436 }
2437 status = nfs4_recover_expired_lease(server);
2438 if (status != 0)
2439 goto err_put_state_owner;
2440 if (d_really_is_positive(dentry))
2441 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2442 status = -ENOMEM;
2443 if (d_really_is_positive(dentry))
2444 claim = NFS4_OPEN_CLAIM_FH;
2445 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2446 label, claim, GFP_KERNEL);
2447 if (opendata == NULL)
2448 goto err_put_state_owner;
2449
2450 if (label) {
2451 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2452 if (IS_ERR(olabel)) {
2453 status = PTR_ERR(olabel);
2454 goto err_opendata_put;
2455 }
2456 }
2457
2458 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2459 if (!opendata->f_attr.mdsthreshold) {
2460 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2461 if (!opendata->f_attr.mdsthreshold)
2462 goto err_free_label;
2463 }
2464 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2465 }
2466 if (d_really_is_positive(dentry))
2467 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2468
2469 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2470 if (status != 0)
2471 goto err_free_label;
2472 state = ctx->state;
2473
2474 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2475 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2476 nfs4_exclusive_attrset(opendata, sattr, &label);
2477
2478 nfs_fattr_init(opendata->o_res.f_attr);
2479 status = nfs4_do_setattr(state->inode, cred,
2480 opendata->o_res.f_attr, sattr,
2481 state, label, olabel);
2482 if (status == 0) {
2483 nfs_setattr_update_inode(state->inode, sattr,
2484 opendata->o_res.f_attr);
2485 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2486 }
2487 }
2488 if (opened && opendata->file_created)
2489 *opened |= FILE_CREATED;
2490
2491 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2492 *ctx_th = opendata->f_attr.mdsthreshold;
2493 opendata->f_attr.mdsthreshold = NULL;
2494 }
2495
2496 nfs4_label_free(olabel);
2497
2498 nfs4_opendata_put(opendata);
2499 nfs4_put_state_owner(sp);
2500 return 0;
2501err_free_label:
2502 nfs4_label_free(olabel);
2503err_opendata_put:
2504 nfs4_opendata_put(opendata);
2505err_put_state_owner:
2506 nfs4_put_state_owner(sp);
2507out_err:
2508 return status;
2509}
2510
2511
2512static struct nfs4_state *nfs4_do_open(struct inode *dir,
2513 struct nfs_open_context *ctx,
2514 int flags,
2515 struct iattr *sattr,
2516 struct nfs4_label *label,
2517 int *opened)
2518{
2519 struct nfs_server *server = NFS_SERVER(dir);
2520 struct nfs4_exception exception = { };
2521 struct nfs4_state *res;
2522 int status;
2523
2524 do {
2525 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2526 res = ctx->state;
2527 trace_nfs4_open_file(ctx, flags, status);
2528 if (status == 0)
2529 break;
2530 /* NOTE: BAD_SEQID means the server and client disagree about the
2531 * book-keeping w.r.t. state-changing operations
2532 * (OPEN/CLOSE/LOCK/LOCKU...)
2533 * It is actually a sign of a bug on the client or on the server.
2534 *
2535 * If we receive a BAD_SEQID error in the particular case of
2536 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2537 * have unhashed the old state_owner for us, and that we can
2538 * therefore safely retry using a new one. We should still warn
2539 * the user though...
2540 */
2541 if (status == -NFS4ERR_BAD_SEQID) {
2542 pr_warn_ratelimited("NFS: v4 server %s "
2543 " returned a bad sequence-id error!\n",
2544 NFS_SERVER(dir)->nfs_client->cl_hostname);
2545 exception.retry = 1;
2546 continue;
2547 }
2548 /*
2549 * BAD_STATEID on OPEN means that the server cancelled our
2550 * state before it received the OPEN_CONFIRM.
2551 * Recover by retrying the request as per the discussion
2552 * on Page 181 of RFC3530.
2553 */
2554 if (status == -NFS4ERR_BAD_STATEID) {
2555 exception.retry = 1;
2556 continue;
2557 }
2558 if (status == -EAGAIN) {
2559 /* We must have found a delegation */
2560 exception.retry = 1;
2561 continue;
2562 }
2563 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2564 continue;
2565 res = ERR_PTR(nfs4_handle_exception(server,
2566 status, &exception));
2567 } while (exception.retry);
2568 return res;
2569}
2570
2571static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2572 struct nfs_fattr *fattr, struct iattr *sattr,
2573 struct nfs4_state *state, struct nfs4_label *ilabel,
2574 struct nfs4_label *olabel)
2575{
2576 struct nfs_server *server = NFS_SERVER(inode);
2577 struct nfs_setattrargs arg = {
2578 .fh = NFS_FH(inode),
2579 .iap = sattr,
2580 .server = server,
2581 .bitmask = server->attr_bitmask,
2582 .label = ilabel,
2583 };
2584 struct nfs_setattrres res = {
2585 .fattr = fattr,
2586 .label = olabel,
2587 .server = server,
2588 };
2589 struct rpc_message msg = {
2590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2591 .rpc_argp = &arg,
2592 .rpc_resp = &res,
2593 .rpc_cred = cred,
2594 };
2595 unsigned long timestamp = jiffies;
2596 fmode_t fmode;
2597 bool truncate;
2598 int status;
2599
2600 arg.bitmask = nfs4_bitmask(server, ilabel);
2601 if (ilabel)
2602 arg.bitmask = nfs4_bitmask(server, olabel);
2603
2604 nfs_fattr_init(fattr);
2605
2606 /* Servers should only apply open mode checks for file size changes */
2607 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2608 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2609
2610 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2611 /* Use that stateid */
2612 } else if (truncate && state != NULL) {
2613 struct nfs_lockowner lockowner = {
2614 .l_owner = current->files,
2615 .l_pid = current->tgid,
2616 };
2617 if (!nfs4_valid_open_stateid(state))
2618 return -EBADF;
2619 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2620 &lockowner) == -EIO)
2621 return -EBADF;
2622 } else
2623 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2624
2625 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2626 if (status == 0 && state != NULL)
2627 renew_lease(server, timestamp);
2628 return status;
2629}
2630
2631static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2632 struct nfs_fattr *fattr, struct iattr *sattr,
2633 struct nfs4_state *state, struct nfs4_label *ilabel,
2634 struct nfs4_label *olabel)
2635{
2636 struct nfs_server *server = NFS_SERVER(inode);
2637 struct nfs4_exception exception = {
2638 .state = state,
2639 .inode = inode,
2640 };
2641 int err;
2642 do {
2643 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2644 trace_nfs4_setattr(inode, err);
2645 switch (err) {
2646 case -NFS4ERR_OPENMODE:
2647 if (!(sattr->ia_valid & ATTR_SIZE)) {
2648 pr_warn_once("NFSv4: server %s is incorrectly "
2649 "applying open mode checks to "
2650 "a SETATTR that is not "
2651 "changing file size.\n",
2652 server->nfs_client->cl_hostname);
2653 }
2654 if (state && !(state->state & FMODE_WRITE)) {
2655 err = -EBADF;
2656 if (sattr->ia_valid & ATTR_OPEN)
2657 err = -EACCES;
2658 goto out;
2659 }
2660 }
2661 err = nfs4_handle_exception(server, err, &exception);
2662 } while (exception.retry);
2663out:
2664 return err;
2665}
2666
2667static bool
2668nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2669{
2670 if (inode == NULL || !nfs_have_layout(inode))
2671 return false;
2672
2673 return pnfs_wait_on_layoutreturn(inode, task);
2674}
2675
2676struct nfs4_closedata {
2677 struct inode *inode;
2678 struct nfs4_state *state;
2679 struct nfs_closeargs arg;
2680 struct nfs_closeres res;
2681 struct nfs_fattr fattr;
2682 unsigned long timestamp;
2683 bool roc;
2684 u32 roc_barrier;
2685};
2686
2687static void nfs4_free_closedata(void *data)
2688{
2689 struct nfs4_closedata *calldata = data;
2690 struct nfs4_state_owner *sp = calldata->state->owner;
2691 struct super_block *sb = calldata->state->inode->i_sb;
2692
2693 if (calldata->roc)
2694 pnfs_roc_release(calldata->state->inode);
2695 nfs4_put_open_state(calldata->state);
2696 nfs_free_seqid(calldata->arg.seqid);
2697 nfs4_put_state_owner(sp);
2698 nfs_sb_deactive(sb);
2699 kfree(calldata);
2700}
2701
2702static void nfs4_close_done(struct rpc_task *task, void *data)
2703{
2704 struct nfs4_closedata *calldata = data;
2705 struct nfs4_state *state = calldata->state;
2706 struct nfs_server *server = NFS_SERVER(calldata->inode);
2707 nfs4_stateid *res_stateid = NULL;
2708
2709 dprintk("%s: begin!\n", __func__);
2710 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2711 return;
2712 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2713 /* hmm. we are done with the inode, and in the process of freeing
2714 * the state_owner. we keep this around to process errors
2715 */
2716 switch (task->tk_status) {
2717 case 0:
2718 res_stateid = &calldata->res.stateid;
2719 if (calldata->roc)
2720 pnfs_roc_set_barrier(state->inode,
2721 calldata->roc_barrier);
2722 renew_lease(server, calldata->timestamp);
2723 break;
2724 case -NFS4ERR_ADMIN_REVOKED:
2725 case -NFS4ERR_STALE_STATEID:
2726 case -NFS4ERR_OLD_STATEID:
2727 case -NFS4ERR_BAD_STATEID:
2728 case -NFS4ERR_EXPIRED:
2729 if (!nfs4_stateid_match(&calldata->arg.stateid,
2730 &state->open_stateid)) {
2731 rpc_restart_call_prepare(task);
2732 goto out_release;
2733 }
2734 if (calldata->arg.fmode == 0)
2735 break;
2736 default:
2737 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2738 rpc_restart_call_prepare(task);
2739 goto out_release;
2740 }
2741 }
2742 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2743 res_stateid, calldata->arg.fmode);
2744out_release:
2745 nfs_release_seqid(calldata->arg.seqid);
2746 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2747 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2748}
2749
2750static void nfs4_close_prepare(struct rpc_task *task, void *data)
2751{
2752 struct nfs4_closedata *calldata = data;
2753 struct nfs4_state *state = calldata->state;
2754 struct inode *inode = calldata->inode;
2755 bool is_rdonly, is_wronly, is_rdwr;
2756 int call_close = 0;
2757
2758 dprintk("%s: begin!\n", __func__);
2759 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2760 goto out_wait;
2761
2762 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2763 spin_lock(&state->owner->so_lock);
2764 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2765 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2766 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2767 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
2768 /* Calculate the change in open mode */
2769 calldata->arg.fmode = 0;
2770 if (state->n_rdwr == 0) {
2771 if (state->n_rdonly == 0)
2772 call_close |= is_rdonly;
2773 else if (is_rdonly)
2774 calldata->arg.fmode |= FMODE_READ;
2775 if (state->n_wronly == 0)
2776 call_close |= is_wronly;
2777 else if (is_wronly)
2778 calldata->arg.fmode |= FMODE_WRITE;
2779 } else if (is_rdwr)
2780 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2781
2782 if (calldata->arg.fmode == 0)
2783 call_close |= is_rdwr;
2784
2785 if (!nfs4_valid_open_stateid(state))
2786 call_close = 0;
2787 spin_unlock(&state->owner->so_lock);
2788
2789 if (!call_close) {
2790 /* Note: exit _without_ calling nfs4_close_done */
2791 goto out_no_action;
2792 }
2793
2794 if (nfs4_wait_on_layoutreturn(inode, task)) {
2795 nfs_release_seqid(calldata->arg.seqid);
2796 goto out_wait;
2797 }
2798
2799 if (calldata->arg.fmode == 0)
2800 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2801 if (calldata->roc)
2802 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2803
2804 calldata->arg.share_access =
2805 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2806 calldata->arg.fmode, 0);
2807
2808 nfs_fattr_init(calldata->res.fattr);
2809 calldata->timestamp = jiffies;
2810 if (nfs4_setup_sequence(NFS_SERVER(inode),
2811 &calldata->arg.seq_args,
2812 &calldata->res.seq_res,
2813 task) != 0)
2814 nfs_release_seqid(calldata->arg.seqid);
2815 dprintk("%s: done!\n", __func__);
2816 return;
2817out_no_action:
2818 task->tk_action = NULL;
2819out_wait:
2820 nfs4_sequence_done(task, &calldata->res.seq_res);
2821}
2822
2823static const struct rpc_call_ops nfs4_close_ops = {
2824 .rpc_call_prepare = nfs4_close_prepare,
2825 .rpc_call_done = nfs4_close_done,
2826 .rpc_release = nfs4_free_closedata,
2827};
2828
2829static bool nfs4_roc(struct inode *inode)
2830{
2831 if (!nfs_have_layout(inode))
2832 return false;
2833 return pnfs_roc(inode);
2834}
2835
2836/*
2837 * It is possible for data to be read/written from a mem-mapped file
2838 * after the sys_close call (which hits the vfs layer as a flush).
2839 * This means that we can't safely call nfsv4 close on a file until
2840 * the inode is cleared. This in turn means that we are not good
2841 * NFSv4 citizens - we do not indicate to the server to update the file's
2842 * share state even when we are done with one of the three share
2843 * stateid's in the inode.
2844 *
2845 * NOTE: Caller must be holding the sp->so_owner semaphore!
2846 */
2847int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2848{
2849 struct nfs_server *server = NFS_SERVER(state->inode);
2850 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2851 struct nfs4_closedata *calldata;
2852 struct nfs4_state_owner *sp = state->owner;
2853 struct rpc_task *task;
2854 struct rpc_message msg = {
2855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2856 .rpc_cred = state->owner->so_cred,
2857 };
2858 struct rpc_task_setup task_setup_data = {
2859 .rpc_client = server->client,
2860 .rpc_message = &msg,
2861 .callback_ops = &nfs4_close_ops,
2862 .workqueue = nfsiod_workqueue,
2863 .flags = RPC_TASK_ASYNC,
2864 };
2865 int status = -ENOMEM;
2866
2867 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2868 &task_setup_data.rpc_client, &msg);
2869
2870 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2871 if (calldata == NULL)
2872 goto out;
2873 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2874 calldata->inode = state->inode;
2875 calldata->state = state;
2876 calldata->arg.fh = NFS_FH(state->inode);
2877 /* Serialization for the sequence id */
2878 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2879 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2880 if (IS_ERR(calldata->arg.seqid))
2881 goto out_free_calldata;
2882 calldata->arg.fmode = 0;
2883 calldata->arg.bitmask = server->cache_consistency_bitmask;
2884 calldata->res.fattr = &calldata->fattr;
2885 calldata->res.seqid = calldata->arg.seqid;
2886 calldata->res.server = server;
2887 calldata->roc = nfs4_roc(state->inode);
2888 nfs_sb_active(calldata->inode->i_sb);
2889
2890 msg.rpc_argp = &calldata->arg;
2891 msg.rpc_resp = &calldata->res;
2892 task_setup_data.callback_data = calldata;
2893 task = rpc_run_task(&task_setup_data);
2894 if (IS_ERR(task))
2895 return PTR_ERR(task);
2896 status = 0;
2897 if (wait)
2898 status = rpc_wait_for_completion_task(task);
2899 rpc_put_task(task);
2900 return status;
2901out_free_calldata:
2902 kfree(calldata);
2903out:
2904 nfs4_put_open_state(state);
2905 nfs4_put_state_owner(sp);
2906 return status;
2907}
2908
2909static struct inode *
2910nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2911 int open_flags, struct iattr *attr, int *opened)
2912{
2913 struct nfs4_state *state;
2914 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2915
2916 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2917
2918 /* Protect against concurrent sillydeletes */
2919 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2920
2921 nfs4_label_release_security(label);
2922
2923 if (IS_ERR(state))
2924 return ERR_CAST(state);
2925 return state->inode;
2926}
2927
2928static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2929{
2930 if (ctx->state == NULL)
2931 return;
2932 if (is_sync)
2933 nfs4_close_sync(ctx->state, ctx->mode);
2934 else
2935 nfs4_close_state(ctx->state, ctx->mode);
2936}
2937
2938#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2939#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2940#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2941
2942static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2943{
2944 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
2945 struct nfs4_server_caps_arg args = {
2946 .fhandle = fhandle,
2947 .bitmask = bitmask,
2948 };
2949 struct nfs4_server_caps_res res = {};
2950 struct rpc_message msg = {
2951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2952 .rpc_argp = &args,
2953 .rpc_resp = &res,
2954 };
2955 int status;
2956
2957 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2958 FATTR4_WORD0_FH_EXPIRE_TYPE |
2959 FATTR4_WORD0_LINK_SUPPORT |
2960 FATTR4_WORD0_SYMLINK_SUPPORT |
2961 FATTR4_WORD0_ACLSUPPORT;
2962 if (minorversion)
2963 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2964
2965 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2966 if (status == 0) {
2967 /* Sanity check the server answers */
2968 switch (minorversion) {
2969 case 0:
2970 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2971 res.attr_bitmask[2] = 0;
2972 break;
2973 case 1:
2974 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2975 break;
2976 case 2:
2977 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2978 }
2979 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2980 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2981 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2982 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2983 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2984 NFS_CAP_CTIME|NFS_CAP_MTIME|
2985 NFS_CAP_SECURITY_LABEL);
2986 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2987 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2988 server->caps |= NFS_CAP_ACLS;
2989 if (res.has_links != 0)
2990 server->caps |= NFS_CAP_HARDLINKS;
2991 if (res.has_symlinks != 0)
2992 server->caps |= NFS_CAP_SYMLINKS;
2993 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2994 server->caps |= NFS_CAP_FILEID;
2995 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2996 server->caps |= NFS_CAP_MODE;
2997 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2998 server->caps |= NFS_CAP_NLINK;
2999 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3000 server->caps |= NFS_CAP_OWNER;
3001 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3002 server->caps |= NFS_CAP_OWNER_GROUP;
3003 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3004 server->caps |= NFS_CAP_ATIME;
3005 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3006 server->caps |= NFS_CAP_CTIME;
3007 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3008 server->caps |= NFS_CAP_MTIME;
3009#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3010 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3011 server->caps |= NFS_CAP_SECURITY_LABEL;
3012#endif
3013 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3014 sizeof(server->attr_bitmask));
3015 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3016
3017 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3018 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3019 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3020 server->cache_consistency_bitmask[2] = 0;
3021 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3022 sizeof(server->exclcreat_bitmask));
3023 server->acl_bitmask = res.acl_bitmask;
3024 server->fh_expire_type = res.fh_expire_type;
3025 }
3026
3027 return status;
3028}
3029
3030int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3031{
3032 struct nfs4_exception exception = { };
3033 int err;
3034 do {
3035 err = nfs4_handle_exception(server,
3036 _nfs4_server_capabilities(server, fhandle),
3037 &exception);
3038 } while (exception.retry);
3039 return err;
3040}
3041
3042static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3043 struct nfs_fsinfo *info)
3044{
3045 u32 bitmask[3];
3046 struct nfs4_lookup_root_arg args = {
3047 .bitmask = bitmask,
3048 };
3049 struct nfs4_lookup_res res = {
3050 .server = server,
3051 .fattr = info->fattr,
3052 .fh = fhandle,
3053 };
3054 struct rpc_message msg = {
3055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3056 .rpc_argp = &args,
3057 .rpc_resp = &res,
3058 };
3059
3060 bitmask[0] = nfs4_fattr_bitmap[0];
3061 bitmask[1] = nfs4_fattr_bitmap[1];
3062 /*
3063 * Process the label in the upcoming getfattr
3064 */
3065 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3066
3067 nfs_fattr_init(info->fattr);
3068 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3069}
3070
3071static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3072 struct nfs_fsinfo *info)
3073{
3074 struct nfs4_exception exception = { };
3075 int err;
3076 do {
3077 err = _nfs4_lookup_root(server, fhandle, info);
3078 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3079 switch (err) {
3080 case 0:
3081 case -NFS4ERR_WRONGSEC:
3082 goto out;
3083 default:
3084 err = nfs4_handle_exception(server, err, &exception);
3085 }
3086 } while (exception.retry);
3087out:
3088 return err;
3089}
3090
3091static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3092 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3093{
3094 struct rpc_auth_create_args auth_args = {
3095 .pseudoflavor = flavor,
3096 };
3097 struct rpc_auth *auth;
3098 int ret;
3099
3100 auth = rpcauth_create(&auth_args, server->client);
3101 if (IS_ERR(auth)) {
3102 ret = -EACCES;
3103 goto out;
3104 }
3105 ret = nfs4_lookup_root(server, fhandle, info);
3106out:
3107 return ret;
3108}
3109
3110/*
3111 * Retry pseudoroot lookup with various security flavors. We do this when:
3112 *
3113 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3114 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3115 *
3116 * Returns zero on success, or a negative NFS4ERR value, or a
3117 * negative errno value.
3118 */
3119static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3120 struct nfs_fsinfo *info)
3121{
3122 /* Per 3530bis 15.33.5 */
3123 static const rpc_authflavor_t flav_array[] = {
3124 RPC_AUTH_GSS_KRB5P,
3125 RPC_AUTH_GSS_KRB5I,
3126 RPC_AUTH_GSS_KRB5,
3127 RPC_AUTH_UNIX, /* courtesy */
3128 RPC_AUTH_NULL,
3129 };
3130 int status = -EPERM;
3131 size_t i;
3132
3133 if (server->auth_info.flavor_len > 0) {
3134 /* try each flavor specified by user */
3135 for (i = 0; i < server->auth_info.flavor_len; i++) {
3136 status = nfs4_lookup_root_sec(server, fhandle, info,
3137 server->auth_info.flavors[i]);
3138 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3139 continue;
3140 break;
3141 }
3142 } else {
3143 /* no flavors specified by user, try default list */
3144 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3145 status = nfs4_lookup_root_sec(server, fhandle, info,
3146 flav_array[i]);
3147 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3148 continue;
3149 break;
3150 }
3151 }
3152
3153 /*
3154 * -EACCESS could mean that the user doesn't have correct permissions
3155 * to access the mount. It could also mean that we tried to mount
3156 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3157 * existing mount programs don't handle -EACCES very well so it should
3158 * be mapped to -EPERM instead.
3159 */
3160 if (status == -EACCES)
3161 status = -EPERM;
3162 return status;
3163}
3164
3165static int nfs4_do_find_root_sec(struct nfs_server *server,
3166 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3167{
3168 int mv = server->nfs_client->cl_minorversion;
3169 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3170}
3171
3172/**
3173 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3174 * @server: initialized nfs_server handle
3175 * @fhandle: we fill in the pseudo-fs root file handle
3176 * @info: we fill in an FSINFO struct
3177 * @auth_probe: probe the auth flavours
3178 *
3179 * Returns zero on success, or a negative errno.
3180 */
3181int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3182 struct nfs_fsinfo *info,
3183 bool auth_probe)
3184{
3185 int status = 0;
3186
3187 if (!auth_probe)
3188 status = nfs4_lookup_root(server, fhandle, info);
3189
3190 if (auth_probe || status == NFS4ERR_WRONGSEC)
3191 status = nfs4_do_find_root_sec(server, fhandle, info);
3192
3193 if (status == 0)
3194 status = nfs4_server_capabilities(server, fhandle);
3195 if (status == 0)
3196 status = nfs4_do_fsinfo(server, fhandle, info);
3197
3198 return nfs4_map_errors(status);
3199}
3200
3201static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3202 struct nfs_fsinfo *info)
3203{
3204 int error;
3205 struct nfs_fattr *fattr = info->fattr;
3206 struct nfs4_label *label = NULL;
3207
3208 error = nfs4_server_capabilities(server, mntfh);
3209 if (error < 0) {
3210 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3211 return error;
3212 }
3213
3214 label = nfs4_label_alloc(server, GFP_KERNEL);
3215 if (IS_ERR(label))
3216 return PTR_ERR(label);
3217
3218 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3219 if (error < 0) {
3220 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3221 goto err_free_label;
3222 }
3223
3224 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3225 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3226 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3227
3228err_free_label:
3229 nfs4_label_free(label);
3230
3231 return error;
3232}
3233
3234/*
3235 * Get locations and (maybe) other attributes of a referral.
3236 * Note that we'll actually follow the referral later when
3237 * we detect fsid mismatch in inode revalidation
3238 */
3239static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3240 const struct qstr *name, struct nfs_fattr *fattr,
3241 struct nfs_fh *fhandle)
3242{
3243 int status = -ENOMEM;
3244 struct page *page = NULL;
3245 struct nfs4_fs_locations *locations = NULL;
3246
3247 page = alloc_page(GFP_KERNEL);
3248 if (page == NULL)
3249 goto out;
3250 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3251 if (locations == NULL)
3252 goto out;
3253
3254 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3255 if (status != 0)
3256 goto out;
3257
3258 /*
3259 * If the fsid didn't change, this is a migration event, not a
3260 * referral. Cause us to drop into the exception handler, which
3261 * will kick off migration recovery.
3262 */
3263 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3264 dprintk("%s: server did not return a different fsid for"
3265 " a referral at %s\n", __func__, name->name);
3266 status = -NFS4ERR_MOVED;
3267 goto out;
3268 }
3269 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3270 nfs_fixup_referral_attributes(&locations->fattr);
3271
3272 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3273 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3274 memset(fhandle, 0, sizeof(struct nfs_fh));
3275out:
3276 if (page)
3277 __free_page(page);
3278 kfree(locations);
3279 return status;
3280}
3281
3282static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3283 struct nfs_fattr *fattr, struct nfs4_label *label)
3284{
3285 struct nfs4_getattr_arg args = {
3286 .fh = fhandle,
3287 .bitmask = server->attr_bitmask,
3288 };
3289 struct nfs4_getattr_res res = {
3290 .fattr = fattr,
3291 .label = label,
3292 .server = server,
3293 };
3294 struct rpc_message msg = {
3295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3296 .rpc_argp = &args,
3297 .rpc_resp = &res,
3298 };
3299
3300 args.bitmask = nfs4_bitmask(server, label);
3301
3302 nfs_fattr_init(fattr);
3303 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3304}
3305
3306static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3307 struct nfs_fattr *fattr, struct nfs4_label *label)
3308{
3309 struct nfs4_exception exception = { };
3310 int err;
3311 do {
3312 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3313 trace_nfs4_getattr(server, fhandle, fattr, err);
3314 err = nfs4_handle_exception(server, err,
3315 &exception);
3316 } while (exception.retry);
3317 return err;
3318}
3319
3320/*
3321 * The file is not closed if it is opened due to the a request to change
3322 * the size of the file. The open call will not be needed once the
3323 * VFS layer lookup-intents are implemented.
3324 *
3325 * Close is called when the inode is destroyed.
3326 * If we haven't opened the file for O_WRONLY, we
3327 * need to in the size_change case to obtain a stateid.
3328 *
3329 * Got race?
3330 * Because OPEN is always done by name in nfsv4, it is
3331 * possible that we opened a different file by the same
3332 * name. We can recognize this race condition, but we
3333 * can't do anything about it besides returning an error.
3334 *
3335 * This will be fixed with VFS changes (lookup-intent).
3336 */
3337static int
3338nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3339 struct iattr *sattr)
3340{
3341 struct inode *inode = d_inode(dentry);
3342 struct rpc_cred *cred = NULL;
3343 struct nfs4_state *state = NULL;
3344 struct nfs4_label *label = NULL;
3345 int status;
3346
3347 if (pnfs_ld_layoutret_on_setattr(inode) &&
3348 sattr->ia_valid & ATTR_SIZE &&
3349 sattr->ia_size < i_size_read(inode))
3350 pnfs_commit_and_return_layout(inode);
3351
3352 nfs_fattr_init(fattr);
3353
3354 /* Deal with open(O_TRUNC) */
3355 if (sattr->ia_valid & ATTR_OPEN)
3356 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3357
3358 /* Optimization: if the end result is no change, don't RPC */
3359 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3360 return 0;
3361
3362 /* Search for an existing open(O_WRITE) file */
3363 if (sattr->ia_valid & ATTR_FILE) {
3364 struct nfs_open_context *ctx;
3365
3366 ctx = nfs_file_open_context(sattr->ia_file);
3367 if (ctx) {
3368 cred = ctx->cred;
3369 state = ctx->state;
3370 }
3371 }
3372
3373 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3374 if (IS_ERR(label))
3375 return PTR_ERR(label);
3376
3377 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3378 if (status == 0) {
3379 nfs_setattr_update_inode(inode, sattr, fattr);
3380 nfs_setsecurity(inode, fattr, label);
3381 }
3382 nfs4_label_free(label);
3383 return status;
3384}
3385
3386static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3387 const struct qstr *name, struct nfs_fh *fhandle,
3388 struct nfs_fattr *fattr, struct nfs4_label *label)
3389{
3390 struct nfs_server *server = NFS_SERVER(dir);
3391 int status;
3392 struct nfs4_lookup_arg args = {
3393 .bitmask = server->attr_bitmask,
3394 .dir_fh = NFS_FH(dir),
3395 .name = name,
3396 };
3397 struct nfs4_lookup_res res = {
3398 .server = server,
3399 .fattr = fattr,
3400 .label = label,
3401 .fh = fhandle,
3402 };
3403 struct rpc_message msg = {
3404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3405 .rpc_argp = &args,
3406 .rpc_resp = &res,
3407 };
3408
3409 args.bitmask = nfs4_bitmask(server, label);
3410
3411 nfs_fattr_init(fattr);
3412
3413 dprintk("NFS call lookup %s\n", name->name);
3414 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3415 dprintk("NFS reply lookup: %d\n", status);
3416 return status;
3417}
3418
3419static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3420{
3421 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3422 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3423 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3424 fattr->nlink = 2;
3425}
3426
3427static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3428 struct qstr *name, struct nfs_fh *fhandle,
3429 struct nfs_fattr *fattr, struct nfs4_label *label)
3430{
3431 struct nfs4_exception exception = { };
3432 struct rpc_clnt *client = *clnt;
3433 int err;
3434 do {
3435 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3436 trace_nfs4_lookup(dir, name, err);
3437 switch (err) {
3438 case -NFS4ERR_BADNAME:
3439 err = -ENOENT;
3440 goto out;
3441 case -NFS4ERR_MOVED:
3442 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3443 if (err == -NFS4ERR_MOVED)
3444 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3445 goto out;
3446 case -NFS4ERR_WRONGSEC:
3447 err = -EPERM;
3448 if (client != *clnt)
3449 goto out;
3450 client = nfs4_negotiate_security(client, dir, name);
3451 if (IS_ERR(client))
3452 return PTR_ERR(client);
3453
3454 exception.retry = 1;
3455 break;
3456 default:
3457 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3458 }
3459 } while (exception.retry);
3460
3461out:
3462 if (err == 0)
3463 *clnt = client;
3464 else if (client != *clnt)
3465 rpc_shutdown_client(client);
3466
3467 return err;
3468}
3469
3470static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3471 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3472 struct nfs4_label *label)
3473{
3474 int status;
3475 struct rpc_clnt *client = NFS_CLIENT(dir);
3476
3477 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3478 if (client != NFS_CLIENT(dir)) {
3479 rpc_shutdown_client(client);
3480 nfs_fixup_secinfo_attributes(fattr);
3481 }
3482 return status;
3483}
3484
3485struct rpc_clnt *
3486nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3487 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3488{
3489 struct rpc_clnt *client = NFS_CLIENT(dir);
3490 int status;
3491
3492 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3493 if (status < 0)
3494 return ERR_PTR(status);
3495 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3496}
3497
3498static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3499{
3500 struct nfs_server *server = NFS_SERVER(inode);
3501 struct nfs4_accessargs args = {
3502 .fh = NFS_FH(inode),
3503 .bitmask = server->cache_consistency_bitmask,
3504 };
3505 struct nfs4_accessres res = {
3506 .server = server,
3507 };
3508 struct rpc_message msg = {
3509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3510 .rpc_argp = &args,
3511 .rpc_resp = &res,
3512 .rpc_cred = entry->cred,
3513 };
3514 int mode = entry->mask;
3515 int status = 0;
3516
3517 /*
3518 * Determine which access bits we want to ask for...
3519 */
3520 if (mode & MAY_READ)
3521 args.access |= NFS4_ACCESS_READ;
3522 if (S_ISDIR(inode->i_mode)) {
3523 if (mode & MAY_WRITE)
3524 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3525 if (mode & MAY_EXEC)
3526 args.access |= NFS4_ACCESS_LOOKUP;
3527 } else {
3528 if (mode & MAY_WRITE)
3529 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3530 if (mode & MAY_EXEC)
3531 args.access |= NFS4_ACCESS_EXECUTE;
3532 }
3533
3534 res.fattr = nfs_alloc_fattr();
3535 if (res.fattr == NULL)
3536 return -ENOMEM;
3537
3538 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3539 if (!status) {
3540 nfs_access_set_mask(entry, res.access);
3541 nfs_refresh_inode(inode, res.fattr);
3542 }
3543 nfs_free_fattr(res.fattr);
3544 return status;
3545}
3546
3547static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3548{
3549 struct nfs4_exception exception = { };
3550 int err;
3551 do {
3552 err = _nfs4_proc_access(inode, entry);
3553 trace_nfs4_access(inode, err);
3554 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3555 &exception);
3556 } while (exception.retry);
3557 return err;
3558}
3559
3560/*
3561 * TODO: For the time being, we don't try to get any attributes
3562 * along with any of the zero-copy operations READ, READDIR,
3563 * READLINK, WRITE.
3564 *
3565 * In the case of the first three, we want to put the GETATTR
3566 * after the read-type operation -- this is because it is hard
3567 * to predict the length of a GETATTR response in v4, and thus
3568 * align the READ data correctly. This means that the GETATTR
3569 * may end up partially falling into the page cache, and we should
3570 * shift it into the 'tail' of the xdr_buf before processing.
3571 * To do this efficiently, we need to know the total length
3572 * of data received, which doesn't seem to be available outside
3573 * of the RPC layer.
3574 *
3575 * In the case of WRITE, we also want to put the GETATTR after
3576 * the operation -- in this case because we want to make sure
3577 * we get the post-operation mtime and size.
3578 *
3579 * Both of these changes to the XDR layer would in fact be quite
3580 * minor, but I decided to leave them for a subsequent patch.
3581 */
3582static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3583 unsigned int pgbase, unsigned int pglen)
3584{
3585 struct nfs4_readlink args = {
3586 .fh = NFS_FH(inode),
3587 .pgbase = pgbase,
3588 .pglen = pglen,
3589 .pages = &page,
3590 };
3591 struct nfs4_readlink_res res;
3592 struct rpc_message msg = {
3593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3594 .rpc_argp = &args,
3595 .rpc_resp = &res,
3596 };
3597
3598 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3599}
3600
3601static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3602 unsigned int pgbase, unsigned int pglen)
3603{
3604 struct nfs4_exception exception = { };
3605 int err;
3606 do {
3607 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3608 trace_nfs4_readlink(inode, err);
3609 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3610 &exception);
3611 } while (exception.retry);
3612 return err;
3613}
3614
3615/*
3616 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3617 */
3618static int
3619nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3620 int flags)
3621{
3622 struct nfs4_label l, *ilabel = NULL;
3623 struct nfs_open_context *ctx;
3624 struct nfs4_state *state;
3625 int status = 0;
3626
3627 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3628 if (IS_ERR(ctx))
3629 return PTR_ERR(ctx);
3630
3631 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3632
3633 sattr->ia_mode &= ~current_umask();
3634 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3635 if (IS_ERR(state)) {
3636 status = PTR_ERR(state);
3637 goto out;
3638 }
3639out:
3640 nfs4_label_release_security(ilabel);
3641 put_nfs_open_context(ctx);
3642 return status;
3643}
3644
3645static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3646{
3647 struct nfs_server *server = NFS_SERVER(dir);
3648 struct nfs_removeargs args = {
3649 .fh = NFS_FH(dir),
3650 .name = *name,
3651 };
3652 struct nfs_removeres res = {
3653 .server = server,
3654 };
3655 struct rpc_message msg = {
3656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3657 .rpc_argp = &args,
3658 .rpc_resp = &res,
3659 };
3660 int status;
3661
3662 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3663 if (status == 0)
3664 update_changeattr(dir, &res.cinfo);
3665 return status;
3666}
3667
3668static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3669{
3670 struct nfs4_exception exception = { };
3671 int err;
3672 do {
3673 err = _nfs4_proc_remove(dir, name);
3674 trace_nfs4_remove(dir, name, err);
3675 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3676 &exception);
3677 } while (exception.retry);
3678 return err;
3679}
3680
3681static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3682{
3683 struct nfs_server *server = NFS_SERVER(dir);
3684 struct nfs_removeargs *args = msg->rpc_argp;
3685 struct nfs_removeres *res = msg->rpc_resp;
3686
3687 res->server = server;
3688 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3689 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3690
3691 nfs_fattr_init(res->dir_attr);
3692}
3693
3694static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3695{
3696 nfs4_setup_sequence(NFS_SERVER(data->dir),
3697 &data->args.seq_args,
3698 &data->res.seq_res,
3699 task);
3700}
3701
3702static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3703{
3704 struct nfs_unlinkdata *data = task->tk_calldata;
3705 struct nfs_removeres *res = &data->res;
3706
3707 if (!nfs4_sequence_done(task, &res->seq_res))
3708 return 0;
3709 if (nfs4_async_handle_error(task, res->server, NULL,
3710 &data->timeout) == -EAGAIN)
3711 return 0;
3712 update_changeattr(dir, &res->cinfo);
3713 return 1;
3714}
3715
3716static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3717{
3718 struct nfs_server *server = NFS_SERVER(dir);
3719 struct nfs_renameargs *arg = msg->rpc_argp;
3720 struct nfs_renameres *res = msg->rpc_resp;
3721
3722 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3723 res->server = server;
3724 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3725}
3726
3727static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3728{
3729 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3730 &data->args.seq_args,
3731 &data->res.seq_res,
3732 task);
3733}
3734
3735static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3736 struct inode *new_dir)
3737{
3738 struct nfs_renamedata *data = task->tk_calldata;
3739 struct nfs_renameres *res = &data->res;
3740
3741 if (!nfs4_sequence_done(task, &res->seq_res))
3742 return 0;
3743 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3744 return 0;
3745
3746 update_changeattr(old_dir, &res->old_cinfo);
3747 update_changeattr(new_dir, &res->new_cinfo);
3748 return 1;
3749}
3750
3751static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3752{
3753 struct nfs_server *server = NFS_SERVER(inode);
3754 struct nfs4_link_arg arg = {
3755 .fh = NFS_FH(inode),
3756 .dir_fh = NFS_FH(dir),
3757 .name = name,
3758 .bitmask = server->attr_bitmask,
3759 };
3760 struct nfs4_link_res res = {
3761 .server = server,
3762 .label = NULL,
3763 };
3764 struct rpc_message msg = {
3765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3766 .rpc_argp = &arg,
3767 .rpc_resp = &res,
3768 };
3769 int status = -ENOMEM;
3770
3771 res.fattr = nfs_alloc_fattr();
3772 if (res.fattr == NULL)
3773 goto out;
3774
3775 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3776 if (IS_ERR(res.label)) {
3777 status = PTR_ERR(res.label);
3778 goto out;
3779 }
3780 arg.bitmask = nfs4_bitmask(server, res.label);
3781
3782 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3783 if (!status) {
3784 update_changeattr(dir, &res.cinfo);
3785 status = nfs_post_op_update_inode(inode, res.fattr);
3786 if (!status)
3787 nfs_setsecurity(inode, res.fattr, res.label);
3788 }
3789
3790
3791 nfs4_label_free(res.label);
3792
3793out:
3794 nfs_free_fattr(res.fattr);
3795 return status;
3796}
3797
3798static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3799{
3800 struct nfs4_exception exception = { };
3801 int err;
3802 do {
3803 err = nfs4_handle_exception(NFS_SERVER(inode),
3804 _nfs4_proc_link(inode, dir, name),
3805 &exception);
3806 } while (exception.retry);
3807 return err;
3808}
3809
3810struct nfs4_createdata {
3811 struct rpc_message msg;
3812 struct nfs4_create_arg arg;
3813 struct nfs4_create_res res;
3814 struct nfs_fh fh;
3815 struct nfs_fattr fattr;
3816 struct nfs4_label *label;
3817};
3818
3819static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3820 struct qstr *name, struct iattr *sattr, u32 ftype)
3821{
3822 struct nfs4_createdata *data;
3823
3824 data = kzalloc(sizeof(*data), GFP_KERNEL);
3825 if (data != NULL) {
3826 struct nfs_server *server = NFS_SERVER(dir);
3827
3828 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3829 if (IS_ERR(data->label))
3830 goto out_free;
3831
3832 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3833 data->msg.rpc_argp = &data->arg;
3834 data->msg.rpc_resp = &data->res;
3835 data->arg.dir_fh = NFS_FH(dir);
3836 data->arg.server = server;
3837 data->arg.name = name;
3838 data->arg.attrs = sattr;
3839 data->arg.ftype = ftype;
3840 data->arg.bitmask = nfs4_bitmask(server, data->label);
3841 data->res.server = server;
3842 data->res.fh = &data->fh;
3843 data->res.fattr = &data->fattr;
3844 data->res.label = data->label;
3845 nfs_fattr_init(data->res.fattr);
3846 }
3847 return data;
3848out_free:
3849 kfree(data);
3850 return NULL;
3851}
3852
3853static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3854{
3855 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3856 &data->arg.seq_args, &data->res.seq_res, 1);
3857 if (status == 0) {
3858 update_changeattr(dir, &data->res.dir_cinfo);
3859 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3860 }
3861 return status;
3862}
3863
3864static void nfs4_free_createdata(struct nfs4_createdata *data)
3865{
3866 nfs4_label_free(data->label);
3867 kfree(data);
3868}
3869
3870static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3871 struct page *page, unsigned int len, struct iattr *sattr,
3872 struct nfs4_label *label)
3873{
3874 struct nfs4_createdata *data;
3875 int status = -ENAMETOOLONG;
3876
3877 if (len > NFS4_MAXPATHLEN)
3878 goto out;
3879
3880 status = -ENOMEM;
3881 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3882 if (data == NULL)
3883 goto out;
3884
3885 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3886 data->arg.u.symlink.pages = &page;
3887 data->arg.u.symlink.len = len;
3888 data->arg.label = label;
3889
3890 status = nfs4_do_create(dir, dentry, data);
3891
3892 nfs4_free_createdata(data);
3893out:
3894 return status;
3895}
3896
3897static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3898 struct page *page, unsigned int len, struct iattr *sattr)
3899{
3900 struct nfs4_exception exception = { };
3901 struct nfs4_label l, *label = NULL;
3902 int err;
3903
3904 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3905
3906 do {
3907 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3908 trace_nfs4_symlink(dir, &dentry->d_name, err);
3909 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3910 &exception);
3911 } while (exception.retry);
3912
3913 nfs4_label_release_security(label);
3914 return err;
3915}
3916
3917static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3918 struct iattr *sattr, struct nfs4_label *label)
3919{
3920 struct nfs4_createdata *data;
3921 int status = -ENOMEM;
3922
3923 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3924 if (data == NULL)
3925 goto out;
3926
3927 data->arg.label = label;
3928 status = nfs4_do_create(dir, dentry, data);
3929
3930 nfs4_free_createdata(data);
3931out:
3932 return status;
3933}
3934
3935static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3936 struct iattr *sattr)
3937{
3938 struct nfs4_exception exception = { };
3939 struct nfs4_label l, *label = NULL;
3940 int err;
3941
3942 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3943
3944 sattr->ia_mode &= ~current_umask();
3945 do {
3946 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3947 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3948 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3949 &exception);
3950 } while (exception.retry);
3951 nfs4_label_release_security(label);
3952
3953 return err;
3954}
3955
3956static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3957 u64 cookie, struct page **pages, unsigned int count, int plus)
3958{
3959 struct inode *dir = d_inode(dentry);
3960 struct nfs4_readdir_arg args = {
3961 .fh = NFS_FH(dir),
3962 .pages = pages,
3963 .pgbase = 0,
3964 .count = count,
3965 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
3966 .plus = plus,
3967 };
3968 struct nfs4_readdir_res res;
3969 struct rpc_message msg = {
3970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3971 .rpc_argp = &args,
3972 .rpc_resp = &res,
3973 .rpc_cred = cred,
3974 };
3975 int status;
3976
3977 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3978 dentry,
3979 (unsigned long long)cookie);
3980 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3981 res.pgbase = args.pgbase;
3982 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3983 if (status >= 0) {
3984 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3985 status += args.pgbase;
3986 }
3987
3988 nfs_invalidate_atime(dir);
3989
3990 dprintk("%s: returns %d\n", __func__, status);
3991 return status;
3992}
3993
3994static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3995 u64 cookie, struct page **pages, unsigned int count, int plus)
3996{
3997 struct nfs4_exception exception = { };
3998 int err;
3999 do {
4000 err = _nfs4_proc_readdir(dentry, cred, cookie,
4001 pages, count, plus);
4002 trace_nfs4_readdir(d_inode(dentry), err);
4003 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4004 &exception);
4005 } while (exception.retry);
4006 return err;
4007}
4008
4009static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4010 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4011{
4012 struct nfs4_createdata *data;
4013 int mode = sattr->ia_mode;
4014 int status = -ENOMEM;
4015
4016 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4017 if (data == NULL)
4018 goto out;
4019
4020 if (S_ISFIFO(mode))
4021 data->arg.ftype = NF4FIFO;
4022 else if (S_ISBLK(mode)) {
4023 data->arg.ftype = NF4BLK;
4024 data->arg.u.device.specdata1 = MAJOR(rdev);
4025 data->arg.u.device.specdata2 = MINOR(rdev);
4026 }
4027 else if (S_ISCHR(mode)) {
4028 data->arg.ftype = NF4CHR;
4029 data->arg.u.device.specdata1 = MAJOR(rdev);
4030 data->arg.u.device.specdata2 = MINOR(rdev);
4031 } else if (!S_ISSOCK(mode)) {
4032 status = -EINVAL;
4033 goto out_free;
4034 }
4035
4036 data->arg.label = label;
4037 status = nfs4_do_create(dir, dentry, data);
4038out_free:
4039 nfs4_free_createdata(data);
4040out:
4041 return status;
4042}
4043
4044static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4045 struct iattr *sattr, dev_t rdev)
4046{
4047 struct nfs4_exception exception = { };
4048 struct nfs4_label l, *label = NULL;
4049 int err;
4050
4051 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4052
4053 sattr->ia_mode &= ~current_umask();
4054 do {
4055 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4056 trace_nfs4_mknod(dir, &dentry->d_name, err);
4057 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4058 &exception);
4059 } while (exception.retry);
4060
4061 nfs4_label_release_security(label);
4062
4063 return err;
4064}
4065
4066static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4067 struct nfs_fsstat *fsstat)
4068{
4069 struct nfs4_statfs_arg args = {
4070 .fh = fhandle,
4071 .bitmask = server->attr_bitmask,
4072 };
4073 struct nfs4_statfs_res res = {
4074 .fsstat = fsstat,
4075 };
4076 struct rpc_message msg = {
4077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4078 .rpc_argp = &args,
4079 .rpc_resp = &res,
4080 };
4081
4082 nfs_fattr_init(fsstat->fattr);
4083 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4084}
4085
4086static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4087{
4088 struct nfs4_exception exception = { };
4089 int err;
4090 do {
4091 err = nfs4_handle_exception(server,
4092 _nfs4_proc_statfs(server, fhandle, fsstat),
4093 &exception);
4094 } while (exception.retry);
4095 return err;
4096}
4097
4098static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4099 struct nfs_fsinfo *fsinfo)
4100{
4101 struct nfs4_fsinfo_arg args = {
4102 .fh = fhandle,
4103 .bitmask = server->attr_bitmask,
4104 };
4105 struct nfs4_fsinfo_res res = {
4106 .fsinfo = fsinfo,
4107 };
4108 struct rpc_message msg = {
4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4110 .rpc_argp = &args,
4111 .rpc_resp = &res,
4112 };
4113
4114 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4115}
4116
4117static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4118{
4119 struct nfs4_exception exception = { };
4120 unsigned long now = jiffies;
4121 int err;
4122
4123 do {
4124 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4125 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4126 if (err == 0) {
4127 struct nfs_client *clp = server->nfs_client;
4128
4129 spin_lock(&clp->cl_lock);
4130 clp->cl_lease_time = fsinfo->lease_time * HZ;
4131 clp->cl_last_renewal = now;
4132 spin_unlock(&clp->cl_lock);
4133 break;
4134 }
4135 err = nfs4_handle_exception(server, err, &exception);
4136 } while (exception.retry);
4137 return err;
4138}
4139
4140static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4141{
4142 int error;
4143
4144 nfs_fattr_init(fsinfo->fattr);
4145 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4146 if (error == 0) {
4147 /* block layout checks this! */
4148 server->pnfs_blksize = fsinfo->blksize;
4149 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4150 }
4151
4152 return error;
4153}
4154
4155static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4156 struct nfs_pathconf *pathconf)
4157{
4158 struct nfs4_pathconf_arg args = {
4159 .fh = fhandle,
4160 .bitmask = server->attr_bitmask,
4161 };
4162 struct nfs4_pathconf_res res = {
4163 .pathconf = pathconf,
4164 };
4165 struct rpc_message msg = {
4166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4167 .rpc_argp = &args,
4168 .rpc_resp = &res,
4169 };
4170
4171 /* None of the pathconf attributes are mandatory to implement */
4172 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4173 memset(pathconf, 0, sizeof(*pathconf));
4174 return 0;
4175 }
4176
4177 nfs_fattr_init(pathconf->fattr);
4178 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4179}
4180
4181static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4182 struct nfs_pathconf *pathconf)
4183{
4184 struct nfs4_exception exception = { };
4185 int err;
4186
4187 do {
4188 err = nfs4_handle_exception(server,
4189 _nfs4_proc_pathconf(server, fhandle, pathconf),
4190 &exception);
4191 } while (exception.retry);
4192 return err;
4193}
4194
4195int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4196 const struct nfs_open_context *ctx,
4197 const struct nfs_lock_context *l_ctx,
4198 fmode_t fmode)
4199{
4200 const struct nfs_lockowner *lockowner = NULL;
4201
4202 if (l_ctx != NULL)
4203 lockowner = &l_ctx->lockowner;
4204 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4205}
4206EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4207
4208static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4209 const struct nfs_open_context *ctx,
4210 const struct nfs_lock_context *l_ctx,
4211 fmode_t fmode)
4212{
4213 nfs4_stateid current_stateid;
4214
4215 /* If the current stateid represents a lost lock, then exit */
4216 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4217 return true;
4218 return nfs4_stateid_match(stateid, &current_stateid);
4219}
4220
4221static bool nfs4_error_stateid_expired(int err)
4222{
4223 switch (err) {
4224 case -NFS4ERR_DELEG_REVOKED:
4225 case -NFS4ERR_ADMIN_REVOKED:
4226 case -NFS4ERR_BAD_STATEID:
4227 case -NFS4ERR_STALE_STATEID:
4228 case -NFS4ERR_OLD_STATEID:
4229 case -NFS4ERR_OPENMODE:
4230 case -NFS4ERR_EXPIRED:
4231 return true;
4232 }
4233 return false;
4234}
4235
4236void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4237{
4238 nfs_invalidate_atime(hdr->inode);
4239}
4240
4241static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4242{
4243 struct nfs_server *server = NFS_SERVER(hdr->inode);
4244
4245 trace_nfs4_read(hdr, task->tk_status);
4246 if (nfs4_async_handle_error(task, server,
4247 hdr->args.context->state,
4248 NULL) == -EAGAIN) {
4249 rpc_restart_call_prepare(task);
4250 return -EAGAIN;
4251 }
4252
4253 __nfs4_read_done_cb(hdr);
4254 if (task->tk_status > 0)
4255 renew_lease(server, hdr->timestamp);
4256 return 0;
4257}
4258
4259static bool nfs4_read_stateid_changed(struct rpc_task *task,
4260 struct nfs_pgio_args *args)
4261{
4262
4263 if (!nfs4_error_stateid_expired(task->tk_status) ||
4264 nfs4_stateid_is_current(&args->stateid,
4265 args->context,
4266 args->lock_context,
4267 FMODE_READ))
4268 return false;
4269 rpc_restart_call_prepare(task);
4270 return true;
4271}
4272
4273static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4274{
4275
4276 dprintk("--> %s\n", __func__);
4277
4278 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4279 return -EAGAIN;
4280 if (nfs4_read_stateid_changed(task, &hdr->args))
4281 return -EAGAIN;
4282 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4283 nfs4_read_done_cb(task, hdr);
4284}
4285
4286static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4287 struct rpc_message *msg)
4288{
4289 hdr->timestamp = jiffies;
4290 hdr->pgio_done_cb = nfs4_read_done_cb;
4291 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4292 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4293}
4294
4295static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4296 struct nfs_pgio_header *hdr)
4297{
4298 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4299 &hdr->args.seq_args,
4300 &hdr->res.seq_res,
4301 task))
4302 return 0;
4303 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4304 hdr->args.lock_context,
4305 hdr->rw_ops->rw_mode) == -EIO)
4306 return -EIO;
4307 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4308 return -EIO;
4309 return 0;
4310}
4311
4312static int nfs4_write_done_cb(struct rpc_task *task,
4313 struct nfs_pgio_header *hdr)
4314{
4315 struct inode *inode = hdr->inode;
4316
4317 trace_nfs4_write(hdr, task->tk_status);
4318 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4319 hdr->args.context->state,
4320 NULL) == -EAGAIN) {
4321 rpc_restart_call_prepare(task);
4322 return -EAGAIN;
4323 }
4324 if (task->tk_status >= 0) {
4325 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4326 nfs_writeback_update_inode(hdr);
4327 }
4328 return 0;
4329}
4330
4331static bool nfs4_write_stateid_changed(struct rpc_task *task,
4332 struct nfs_pgio_args *args)
4333{
4334
4335 if (!nfs4_error_stateid_expired(task->tk_status) ||
4336 nfs4_stateid_is_current(&args->stateid,
4337 args->context,
4338 args->lock_context,
4339 FMODE_WRITE))
4340 return false;
4341 rpc_restart_call_prepare(task);
4342 return true;
4343}
4344
4345static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4346{
4347 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4348 return -EAGAIN;
4349 if (nfs4_write_stateid_changed(task, &hdr->args))
4350 return -EAGAIN;
4351 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4352 nfs4_write_done_cb(task, hdr);
4353}
4354
4355static
4356bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4357{
4358 /* Don't request attributes for pNFS or O_DIRECT writes */
4359 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4360 return false;
4361 /* Otherwise, request attributes if and only if we don't hold
4362 * a delegation
4363 */
4364 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4365}
4366
4367static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4368 struct rpc_message *msg)
4369{
4370 struct nfs_server *server = NFS_SERVER(hdr->inode);
4371
4372 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4373 hdr->args.bitmask = NULL;
4374 hdr->res.fattr = NULL;
4375 } else
4376 hdr->args.bitmask = server->cache_consistency_bitmask;
4377
4378 if (!hdr->pgio_done_cb)
4379 hdr->pgio_done_cb = nfs4_write_done_cb;
4380 hdr->res.server = server;
4381 hdr->timestamp = jiffies;
4382
4383 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4384 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4385}
4386
4387static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4388{
4389 nfs4_setup_sequence(NFS_SERVER(data->inode),
4390 &data->args.seq_args,
4391 &data->res.seq_res,
4392 task);
4393}
4394
4395static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4396{
4397 struct inode *inode = data->inode;
4398
4399 trace_nfs4_commit(data, task->tk_status);
4400 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4401 NULL, NULL) == -EAGAIN) {
4402 rpc_restart_call_prepare(task);
4403 return -EAGAIN;
4404 }
4405 return 0;
4406}
4407
4408static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4409{
4410 if (!nfs4_sequence_done(task, &data->res.seq_res))
4411 return -EAGAIN;
4412 return data->commit_done_cb(task, data);
4413}
4414
4415static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4416{
4417 struct nfs_server *server = NFS_SERVER(data->inode);
4418
4419 if (data->commit_done_cb == NULL)
4420 data->commit_done_cb = nfs4_commit_done_cb;
4421 data->res.server = server;
4422 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4423 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4424}
4425
4426struct nfs4_renewdata {
4427 struct nfs_client *client;
4428 unsigned long timestamp;
4429};
4430
4431/*
4432 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4433 * standalone procedure for queueing an asynchronous RENEW.
4434 */
4435static void nfs4_renew_release(void *calldata)
4436{
4437 struct nfs4_renewdata *data = calldata;
4438 struct nfs_client *clp = data->client;
4439
4440 if (atomic_read(&clp->cl_count) > 1)
4441 nfs4_schedule_state_renewal(clp);
4442 nfs_put_client(clp);
4443 kfree(data);
4444}
4445
4446static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4447{
4448 struct nfs4_renewdata *data = calldata;
4449 struct nfs_client *clp = data->client;
4450 unsigned long timestamp = data->timestamp;
4451
4452 trace_nfs4_renew_async(clp, task->tk_status);
4453 switch (task->tk_status) {
4454 case 0:
4455 break;
4456 case -NFS4ERR_LEASE_MOVED:
4457 nfs4_schedule_lease_moved_recovery(clp);
4458 break;
4459 default:
4460 /* Unless we're shutting down, schedule state recovery! */
4461 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4462 return;
4463 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4464 nfs4_schedule_lease_recovery(clp);
4465 return;
4466 }
4467 nfs4_schedule_path_down_recovery(clp);
4468 }
4469 do_renew_lease(clp, timestamp);
4470}
4471
4472static const struct rpc_call_ops nfs4_renew_ops = {
4473 .rpc_call_done = nfs4_renew_done,
4474 .rpc_release = nfs4_renew_release,
4475};
4476
4477static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4478{
4479 struct rpc_message msg = {
4480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4481 .rpc_argp = clp,
4482 .rpc_cred = cred,
4483 };
4484 struct nfs4_renewdata *data;
4485
4486 if (renew_flags == 0)
4487 return 0;
4488 if (!atomic_inc_not_zero(&clp->cl_count))
4489 return -EIO;
4490 data = kmalloc(sizeof(*data), GFP_NOFS);
4491 if (data == NULL)
4492 return -ENOMEM;
4493 data->client = clp;
4494 data->timestamp = jiffies;
4495 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4496 &nfs4_renew_ops, data);
4497}
4498
4499static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4500{
4501 struct rpc_message msg = {
4502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4503 .rpc_argp = clp,
4504 .rpc_cred = cred,
4505 };
4506 unsigned long now = jiffies;
4507 int status;
4508
4509 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4510 if (status < 0)
4511 return status;
4512 do_renew_lease(clp, now);
4513 return 0;
4514}
4515
4516static inline int nfs4_server_supports_acls(struct nfs_server *server)
4517{
4518 return server->caps & NFS_CAP_ACLS;
4519}
4520
4521/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4522 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4523 * the stack.
4524 */
4525#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4526
4527static int buf_to_pages_noslab(const void *buf, size_t buflen,
4528 struct page **pages, unsigned int *pgbase)
4529{
4530 struct page *newpage, **spages;
4531 int rc = 0;
4532 size_t len;
4533 spages = pages;
4534
4535 do {
4536 len = min_t(size_t, PAGE_SIZE, buflen);
4537 newpage = alloc_page(GFP_KERNEL);
4538
4539 if (newpage == NULL)
4540 goto unwind;
4541 memcpy(page_address(newpage), buf, len);
4542 buf += len;
4543 buflen -= len;
4544 *pages++ = newpage;
4545 rc++;
4546 } while (buflen != 0);
4547
4548 return rc;
4549
4550unwind:
4551 for(; rc > 0; rc--)
4552 __free_page(spages[rc-1]);
4553 return -ENOMEM;
4554}
4555
4556struct nfs4_cached_acl {
4557 int cached;
4558 size_t len;
4559 char data[0];
4560};
4561
4562static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4563{
4564 struct nfs_inode *nfsi = NFS_I(inode);
4565
4566 spin_lock(&inode->i_lock);
4567 kfree(nfsi->nfs4_acl);
4568 nfsi->nfs4_acl = acl;
4569 spin_unlock(&inode->i_lock);
4570}
4571
4572static void nfs4_zap_acl_attr(struct inode *inode)
4573{
4574 nfs4_set_cached_acl(inode, NULL);
4575}
4576
4577static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4578{
4579 struct nfs_inode *nfsi = NFS_I(inode);
4580 struct nfs4_cached_acl *acl;
4581 int ret = -ENOENT;
4582
4583 spin_lock(&inode->i_lock);
4584 acl = nfsi->nfs4_acl;
4585 if (acl == NULL)
4586 goto out;
4587 if (buf == NULL) /* user is just asking for length */
4588 goto out_len;
4589 if (acl->cached == 0)
4590 goto out;
4591 ret = -ERANGE; /* see getxattr(2) man page */
4592 if (acl->len > buflen)
4593 goto out;
4594 memcpy(buf, acl->data, acl->len);
4595out_len:
4596 ret = acl->len;
4597out:
4598 spin_unlock(&inode->i_lock);
4599 return ret;
4600}
4601
4602static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4603{
4604 struct nfs4_cached_acl *acl;
4605 size_t buflen = sizeof(*acl) + acl_len;
4606
4607 if (buflen <= PAGE_SIZE) {
4608 acl = kmalloc(buflen, GFP_KERNEL);
4609 if (acl == NULL)
4610 goto out;
4611 acl->cached = 1;
4612 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4613 } else {
4614 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4615 if (acl == NULL)
4616 goto out;
4617 acl->cached = 0;
4618 }
4619 acl->len = acl_len;
4620out:
4621 nfs4_set_cached_acl(inode, acl);
4622}
4623
4624/*
4625 * The getxattr API returns the required buffer length when called with a
4626 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4627 * the required buf. On a NULL buf, we send a page of data to the server
4628 * guessing that the ACL request can be serviced by a page. If so, we cache
4629 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4630 * the cache. If not so, we throw away the page, and cache the required
4631 * length. The next getxattr call will then produce another round trip to
4632 * the server, this time with the input buf of the required size.
4633 */
4634static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4635{
4636 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4637 struct nfs_getaclargs args = {
4638 .fh = NFS_FH(inode),
4639 .acl_pages = pages,
4640 .acl_len = buflen,
4641 };
4642 struct nfs_getaclres res = {
4643 .acl_len = buflen,
4644 };
4645 struct rpc_message msg = {
4646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4647 .rpc_argp = &args,
4648 .rpc_resp = &res,
4649 };
4650 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4651 int ret = -ENOMEM, i;
4652
4653 /* As long as we're doing a round trip to the server anyway,
4654 * let's be prepared for a page of acl data. */
4655 if (npages == 0)
4656 npages = 1;
4657 if (npages > ARRAY_SIZE(pages))
4658 return -ERANGE;
4659
4660 for (i = 0; i < npages; i++) {
4661 pages[i] = alloc_page(GFP_KERNEL);
4662 if (!pages[i])
4663 goto out_free;
4664 }
4665
4666 /* for decoding across pages */
4667 res.acl_scratch = alloc_page(GFP_KERNEL);
4668 if (!res.acl_scratch)
4669 goto out_free;
4670
4671 args.acl_len = npages * PAGE_SIZE;
4672 args.acl_pgbase = 0;
4673
4674 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4675 __func__, buf, buflen, npages, args.acl_len);
4676 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4677 &msg, &args.seq_args, &res.seq_res, 0);
4678 if (ret)
4679 goto out_free;
4680
4681 /* Handle the case where the passed-in buffer is too short */
4682 if (res.acl_flags & NFS4_ACL_TRUNC) {
4683 /* Did the user only issue a request for the acl length? */
4684 if (buf == NULL)
4685 goto out_ok;
4686 ret = -ERANGE;
4687 goto out_free;
4688 }
4689 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4690 if (buf) {
4691 if (res.acl_len > buflen) {
4692 ret = -ERANGE;
4693 goto out_free;
4694 }
4695 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4696 }
4697out_ok:
4698 ret = res.acl_len;
4699out_free:
4700 for (i = 0; i < npages; i++)
4701 if (pages[i])
4702 __free_page(pages[i]);
4703 if (res.acl_scratch)
4704 __free_page(res.acl_scratch);
4705 return ret;
4706}
4707
4708static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4709{
4710 struct nfs4_exception exception = { };
4711 ssize_t ret;
4712 do {
4713 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4714 trace_nfs4_get_acl(inode, ret);
4715 if (ret >= 0)
4716 break;
4717 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4718 } while (exception.retry);
4719 return ret;
4720}
4721
4722static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4723{
4724 struct nfs_server *server = NFS_SERVER(inode);
4725 int ret;
4726
4727 if (!nfs4_server_supports_acls(server))
4728 return -EOPNOTSUPP;
4729 ret = nfs_revalidate_inode(server, inode);
4730 if (ret < 0)
4731 return ret;
4732 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4733 nfs_zap_acl_cache(inode);
4734 ret = nfs4_read_cached_acl(inode, buf, buflen);
4735 if (ret != -ENOENT)
4736 /* -ENOENT is returned if there is no ACL or if there is an ACL
4737 * but no cached acl data, just the acl length */
4738 return ret;
4739 return nfs4_get_acl_uncached(inode, buf, buflen);
4740}
4741
4742static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4743{
4744 struct nfs_server *server = NFS_SERVER(inode);
4745 struct page *pages[NFS4ACL_MAXPAGES];
4746 struct nfs_setaclargs arg = {
4747 .fh = NFS_FH(inode),
4748 .acl_pages = pages,
4749 .acl_len = buflen,
4750 };
4751 struct nfs_setaclres res;
4752 struct rpc_message msg = {
4753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4754 .rpc_argp = &arg,
4755 .rpc_resp = &res,
4756 };
4757 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4758 int ret, i;
4759
4760 if (!nfs4_server_supports_acls(server))
4761 return -EOPNOTSUPP;
4762 if (npages > ARRAY_SIZE(pages))
4763 return -ERANGE;
4764 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4765 if (i < 0)
4766 return i;
4767 nfs4_inode_return_delegation(inode);
4768 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4769
4770 /*
4771 * Free each page after tx, so the only ref left is
4772 * held by the network stack
4773 */
4774 for (; i > 0; i--)
4775 put_page(pages[i-1]);
4776
4777 /*
4778 * Acl update can result in inode attribute update.
4779 * so mark the attribute cache invalid.
4780 */
4781 spin_lock(&inode->i_lock);
4782 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4783 spin_unlock(&inode->i_lock);
4784 nfs_access_zap_cache(inode);
4785 nfs_zap_acl_cache(inode);
4786 return ret;
4787}
4788
4789static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4790{
4791 struct nfs4_exception exception = { };
4792 int err;
4793 do {
4794 err = __nfs4_proc_set_acl(inode, buf, buflen);
4795 trace_nfs4_set_acl(inode, err);
4796 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4797 &exception);
4798 } while (exception.retry);
4799 return err;
4800}
4801
4802#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4803static int _nfs4_get_security_label(struct inode *inode, void *buf,
4804 size_t buflen)
4805{
4806 struct nfs_server *server = NFS_SERVER(inode);
4807 struct nfs_fattr fattr;
4808 struct nfs4_label label = {0, 0, buflen, buf};
4809
4810 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4811 struct nfs4_getattr_arg arg = {
4812 .fh = NFS_FH(inode),
4813 .bitmask = bitmask,
4814 };
4815 struct nfs4_getattr_res res = {
4816 .fattr = &fattr,
4817 .label = &label,
4818 .server = server,
4819 };
4820 struct rpc_message msg = {
4821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4822 .rpc_argp = &arg,
4823 .rpc_resp = &res,
4824 };
4825 int ret;
4826
4827 nfs_fattr_init(&fattr);
4828
4829 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4830 if (ret)
4831 return ret;
4832 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4833 return -ENOENT;
4834 if (buflen < label.len)
4835 return -ERANGE;
4836 return 0;
4837}
4838
4839static int nfs4_get_security_label(struct inode *inode, void *buf,
4840 size_t buflen)
4841{
4842 struct nfs4_exception exception = { };
4843 int err;
4844
4845 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4846 return -EOPNOTSUPP;
4847
4848 do {
4849 err = _nfs4_get_security_label(inode, buf, buflen);
4850 trace_nfs4_get_security_label(inode, err);
4851 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4852 &exception);
4853 } while (exception.retry);
4854 return err;
4855}
4856
4857static int _nfs4_do_set_security_label(struct inode *inode,
4858 struct nfs4_label *ilabel,
4859 struct nfs_fattr *fattr,
4860 struct nfs4_label *olabel)
4861{
4862
4863 struct iattr sattr = {0};
4864 struct nfs_server *server = NFS_SERVER(inode);
4865 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4866 struct nfs_setattrargs arg = {
4867 .fh = NFS_FH(inode),
4868 .iap = &sattr,
4869 .server = server,
4870 .bitmask = bitmask,
4871 .label = ilabel,
4872 };
4873 struct nfs_setattrres res = {
4874 .fattr = fattr,
4875 .label = olabel,
4876 .server = server,
4877 };
4878 struct rpc_message msg = {
4879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4880 .rpc_argp = &arg,
4881 .rpc_resp = &res,
4882 };
4883 int status;
4884
4885 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4886
4887 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4888 if (status)
4889 dprintk("%s failed: %d\n", __func__, status);
4890
4891 return status;
4892}
4893
4894static int nfs4_do_set_security_label(struct inode *inode,
4895 struct nfs4_label *ilabel,
4896 struct nfs_fattr *fattr,
4897 struct nfs4_label *olabel)
4898{
4899 struct nfs4_exception exception = { };
4900 int err;
4901
4902 do {
4903 err = _nfs4_do_set_security_label(inode, ilabel,
4904 fattr, olabel);
4905 trace_nfs4_set_security_label(inode, err);
4906 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4907 &exception);
4908 } while (exception.retry);
4909 return err;
4910}
4911
4912static int
4913nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4914{
4915 struct nfs4_label ilabel, *olabel = NULL;
4916 struct nfs_fattr fattr;
4917 struct rpc_cred *cred;
4918 struct inode *inode = d_inode(dentry);
4919 int status;
4920
4921 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4922 return -EOPNOTSUPP;
4923
4924 nfs_fattr_init(&fattr);
4925
4926 ilabel.pi = 0;
4927 ilabel.lfs = 0;
4928 ilabel.label = (char *)buf;
4929 ilabel.len = buflen;
4930
4931 cred = rpc_lookup_cred();
4932 if (IS_ERR(cred))
4933 return PTR_ERR(cred);
4934
4935 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4936 if (IS_ERR(olabel)) {
4937 status = -PTR_ERR(olabel);
4938 goto out;
4939 }
4940
4941 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4942 if (status == 0)
4943 nfs_setsecurity(inode, &fattr, olabel);
4944
4945 nfs4_label_free(olabel);
4946out:
4947 put_rpccred(cred);
4948 return status;
4949}
4950#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4951
4952
4953static int
4954nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4955 struct nfs4_state *state, long *timeout)
4956{
4957 struct nfs_client *clp = server->nfs_client;
4958
4959 if (task->tk_status >= 0)
4960 return 0;
4961 switch(task->tk_status) {
4962 case -NFS4ERR_DELEG_REVOKED:
4963 case -NFS4ERR_ADMIN_REVOKED:
4964 case -NFS4ERR_BAD_STATEID:
4965 case -NFS4ERR_OPENMODE:
4966 if (state == NULL)
4967 break;
4968 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4969 goto recovery_failed;
4970 goto wait_on_recovery;
4971 case -NFS4ERR_EXPIRED:
4972 if (state != NULL) {
4973 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4974 goto recovery_failed;
4975 }
4976 case -NFS4ERR_STALE_STATEID:
4977 case -NFS4ERR_STALE_CLIENTID:
4978 nfs4_schedule_lease_recovery(clp);
4979 goto wait_on_recovery;
4980 case -NFS4ERR_MOVED:
4981 if (nfs4_schedule_migration_recovery(server) < 0)
4982 goto recovery_failed;
4983 goto wait_on_recovery;
4984 case -NFS4ERR_LEASE_MOVED:
4985 nfs4_schedule_lease_moved_recovery(clp);
4986 goto wait_on_recovery;
4987#if defined(CONFIG_NFS_V4_1)
4988 case -NFS4ERR_BADSESSION:
4989 case -NFS4ERR_BADSLOT:
4990 case -NFS4ERR_BAD_HIGH_SLOT:
4991 case -NFS4ERR_DEADSESSION:
4992 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4993 case -NFS4ERR_SEQ_FALSE_RETRY:
4994 case -NFS4ERR_SEQ_MISORDERED:
4995 dprintk("%s ERROR %d, Reset session\n", __func__,
4996 task->tk_status);
4997 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4998 goto wait_on_recovery;
4999#endif /* CONFIG_NFS_V4_1 */
5000 case -NFS4ERR_DELAY:
5001 nfs_inc_server_stats(server, NFSIOS_DELAY);
5002 rpc_delay(task, nfs4_update_delay(timeout));
5003 goto restart_call;
5004 case -NFS4ERR_GRACE:
5005 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5006 case -NFS4ERR_RETRY_UNCACHED_REP:
5007 case -NFS4ERR_OLD_STATEID:
5008 goto restart_call;
5009 }
5010 task->tk_status = nfs4_map_errors(task->tk_status);
5011 return 0;
5012recovery_failed:
5013 task->tk_status = -EIO;
5014 return 0;
5015wait_on_recovery:
5016 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
5017 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5018 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
5019 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5020 goto recovery_failed;
5021restart_call:
5022 task->tk_status = 0;
5023 return -EAGAIN;
5024}
5025
5026static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5027 nfs4_verifier *bootverf)
5028{
5029 __be32 verf[2];
5030
5031 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5032 /* An impossible timestamp guarantees this value
5033 * will never match a generated boot time. */
5034 verf[0] = 0;
5035 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
5036 } else {
5037 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5038 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5039 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
5040 }
5041 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5042}
5043
5044static int
5045nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5046{
5047 int result;
5048 size_t len;
5049 char *str;
5050
5051 if (clp->cl_owner_id != NULL)
5052 return 0;
5053
5054 rcu_read_lock();
5055 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5056 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5057 1 +
5058 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5059 1;
5060 rcu_read_unlock();
5061
5062 if (len > NFS4_OPAQUE_LIMIT + 1)
5063 return -EINVAL;
5064
5065 /*
5066 * Since this string is allocated at mount time, and held until the
5067 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5068 * about a memory-reclaim deadlock.
5069 */
5070 str = kmalloc(len, GFP_KERNEL);
5071 if (!str)
5072 return -ENOMEM;
5073
5074 rcu_read_lock();
5075 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5076 clp->cl_ipaddr,
5077 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5078 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5079 rcu_read_unlock();
5080
5081 clp->cl_owner_id = str;
5082 return 0;
5083}
5084
5085static int
5086nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5087{
5088 int result;
5089 size_t len;
5090 char *str;
5091
5092 len = 10 + 10 + 1 + 10 + 1 +
5093 strlen(nfs4_client_id_uniquifier) + 1 +
5094 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5095
5096 if (len > NFS4_OPAQUE_LIMIT + 1)
5097 return -EINVAL;
5098
5099 /*
5100 * Since this string is allocated at mount time, and held until the
5101 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5102 * about a memory-reclaim deadlock.
5103 */
5104 str = kmalloc(len, GFP_KERNEL);
5105 if (!str)
5106 return -ENOMEM;
5107
5108 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5109 clp->rpc_ops->version, clp->cl_minorversion,
5110 nfs4_client_id_uniquifier,
5111 clp->cl_rpcclient->cl_nodename);
5112 clp->cl_owner_id = str;
5113 return 0;
5114}
5115
5116static int
5117nfs4_init_uniform_client_string(struct nfs_client *clp)
5118{
5119 int result;
5120 size_t len;
5121 char *str;
5122
5123 if (clp->cl_owner_id != NULL)
5124 return 0;
5125
5126 if (nfs4_client_id_uniquifier[0] != '\0')
5127 return nfs4_init_uniquifier_client_string(clp);
5128
5129 len = 10 + 10 + 1 + 10 + 1 +
5130 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5131
5132 if (len > NFS4_OPAQUE_LIMIT + 1)
5133 return -EINVAL;
5134
5135 /*
5136 * Since this string is allocated at mount time, and held until the
5137 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5138 * about a memory-reclaim deadlock.
5139 */
5140 str = kmalloc(len, GFP_KERNEL);
5141 if (!str)
5142 return -ENOMEM;
5143
5144 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5145 clp->rpc_ops->version, clp->cl_minorversion,
5146 clp->cl_rpcclient->cl_nodename);
5147 clp->cl_owner_id = str;
5148 return 0;
5149}
5150
5151/*
5152 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5153 * services. Advertise one based on the address family of the
5154 * clientaddr.
5155 */
5156static unsigned int
5157nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5158{
5159 if (strchr(clp->cl_ipaddr, ':') != NULL)
5160 return scnprintf(buf, len, "tcp6");
5161 else
5162 return scnprintf(buf, len, "tcp");
5163}
5164
5165static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5166{
5167 struct nfs4_setclientid *sc = calldata;
5168
5169 if (task->tk_status == 0)
5170 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5171}
5172
5173static const struct rpc_call_ops nfs4_setclientid_ops = {
5174 .rpc_call_done = nfs4_setclientid_done,
5175};
5176
5177/**
5178 * nfs4_proc_setclientid - Negotiate client ID
5179 * @clp: state data structure
5180 * @program: RPC program for NFSv4 callback service
5181 * @port: IP port number for NFS4 callback service
5182 * @cred: RPC credential to use for this call
5183 * @res: where to place the result
5184 *
5185 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5186 */
5187int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5188 unsigned short port, struct rpc_cred *cred,
5189 struct nfs4_setclientid_res *res)
5190{
5191 nfs4_verifier sc_verifier;
5192 struct nfs4_setclientid setclientid = {
5193 .sc_verifier = &sc_verifier,
5194 .sc_prog = program,
5195 .sc_clnt = clp,
5196 };
5197 struct rpc_message msg = {
5198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5199 .rpc_argp = &setclientid,
5200 .rpc_resp = res,
5201 .rpc_cred = cred,
5202 };
5203 struct rpc_task *task;
5204 struct rpc_task_setup task_setup_data = {
5205 .rpc_client = clp->cl_rpcclient,
5206 .rpc_message = &msg,
5207 .callback_ops = &nfs4_setclientid_ops,
5208 .callback_data = &setclientid,
5209 .flags = RPC_TASK_TIMEOUT,
5210 };
5211 int status;
5212
5213 /* nfs_client_id4 */
5214 nfs4_init_boot_verifier(clp, &sc_verifier);
5215
5216 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5217 status = nfs4_init_uniform_client_string(clp);
5218 else
5219 status = nfs4_init_nonuniform_client_string(clp);
5220
5221 if (status)
5222 goto out;
5223
5224 /* cb_client4 */
5225 setclientid.sc_netid_len =
5226 nfs4_init_callback_netid(clp,
5227 setclientid.sc_netid,
5228 sizeof(setclientid.sc_netid));
5229 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5230 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5231 clp->cl_ipaddr, port >> 8, port & 255);
5232
5233 dprintk("NFS call setclientid auth=%s, '%s'\n",
5234 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5235 clp->cl_owner_id);
5236 task = rpc_run_task(&task_setup_data);
5237 if (IS_ERR(task)) {
5238 status = PTR_ERR(task);
5239 goto out;
5240 }
5241 status = task->tk_status;
5242 if (setclientid.sc_cred) {
5243 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5244 put_rpccred(setclientid.sc_cred);
5245 }
5246 rpc_put_task(task);
5247out:
5248 trace_nfs4_setclientid(clp, status);
5249 dprintk("NFS reply setclientid: %d\n", status);
5250 return status;
5251}
5252
5253/**
5254 * nfs4_proc_setclientid_confirm - Confirm client ID
5255 * @clp: state data structure
5256 * @res: result of a previous SETCLIENTID
5257 * @cred: RPC credential to use for this call
5258 *
5259 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5260 */
5261int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5262 struct nfs4_setclientid_res *arg,
5263 struct rpc_cred *cred)
5264{
5265 struct rpc_message msg = {
5266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5267 .rpc_argp = arg,
5268 .rpc_cred = cred,
5269 };
5270 int status;
5271
5272 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5273 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5274 clp->cl_clientid);
5275 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5276 trace_nfs4_setclientid_confirm(clp, status);
5277 dprintk("NFS reply setclientid_confirm: %d\n", status);
5278 return status;
5279}
5280
5281struct nfs4_delegreturndata {
5282 struct nfs4_delegreturnargs args;
5283 struct nfs4_delegreturnres res;
5284 struct nfs_fh fh;
5285 nfs4_stateid stateid;
5286 unsigned long timestamp;
5287 struct nfs_fattr fattr;
5288 int rpc_status;
5289 struct inode *inode;
5290 bool roc;
5291 u32 roc_barrier;
5292};
5293
5294static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5295{
5296 struct nfs4_delegreturndata *data = calldata;
5297
5298 if (!nfs4_sequence_done(task, &data->res.seq_res))
5299 return;
5300
5301 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5302 switch (task->tk_status) {
5303 case 0:
5304 renew_lease(data->res.server, data->timestamp);
5305 case -NFS4ERR_ADMIN_REVOKED:
5306 case -NFS4ERR_DELEG_REVOKED:
5307 case -NFS4ERR_BAD_STATEID:
5308 case -NFS4ERR_OLD_STATEID:
5309 case -NFS4ERR_STALE_STATEID:
5310 case -NFS4ERR_EXPIRED:
5311 task->tk_status = 0;
5312 if (data->roc)
5313 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5314 break;
5315 default:
5316 if (nfs4_async_handle_error(task, data->res.server,
5317 NULL, NULL) == -EAGAIN) {
5318 rpc_restart_call_prepare(task);
5319 return;
5320 }
5321 }
5322 data->rpc_status = task->tk_status;
5323}
5324
5325static void nfs4_delegreturn_release(void *calldata)
5326{
5327 struct nfs4_delegreturndata *data = calldata;
5328 struct inode *inode = data->inode;
5329
5330 if (inode) {
5331 if (data->roc)
5332 pnfs_roc_release(inode);
5333 nfs_iput_and_deactive(inode);
5334 }
5335 kfree(calldata);
5336}
5337
5338static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5339{
5340 struct nfs4_delegreturndata *d_data;
5341
5342 d_data = (struct nfs4_delegreturndata *)data;
5343
5344 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5345 return;
5346
5347 if (d_data->roc)
5348 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5349
5350 nfs4_setup_sequence(d_data->res.server,
5351 &d_data->args.seq_args,
5352 &d_data->res.seq_res,
5353 task);
5354}
5355
5356static const struct rpc_call_ops nfs4_delegreturn_ops = {
5357 .rpc_call_prepare = nfs4_delegreturn_prepare,
5358 .rpc_call_done = nfs4_delegreturn_done,
5359 .rpc_release = nfs4_delegreturn_release,
5360};
5361
5362static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5363{
5364 struct nfs4_delegreturndata *data;
5365 struct nfs_server *server = NFS_SERVER(inode);
5366 struct rpc_task *task;
5367 struct rpc_message msg = {
5368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5369 .rpc_cred = cred,
5370 };
5371 struct rpc_task_setup task_setup_data = {
5372 .rpc_client = server->client,
5373 .rpc_message = &msg,
5374 .callback_ops = &nfs4_delegreturn_ops,
5375 .flags = RPC_TASK_ASYNC,
5376 };
5377 int status = 0;
5378
5379 data = kzalloc(sizeof(*data), GFP_NOFS);
5380 if (data == NULL)
5381 return -ENOMEM;
5382 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5383 data->args.fhandle = &data->fh;
5384 data->args.stateid = &data->stateid;
5385 data->args.bitmask = server->cache_consistency_bitmask;
5386 nfs_copy_fh(&data->fh, NFS_FH(inode));
5387 nfs4_stateid_copy(&data->stateid, stateid);
5388 data->res.fattr = &data->fattr;
5389 data->res.server = server;
5390 nfs_fattr_init(data->res.fattr);
5391 data->timestamp = jiffies;
5392 data->rpc_status = 0;
5393 data->inode = nfs_igrab_and_active(inode);
5394 if (data->inode)
5395 data->roc = nfs4_roc(inode);
5396
5397 task_setup_data.callback_data = data;
5398 msg.rpc_argp = &data->args;
5399 msg.rpc_resp = &data->res;
5400 task = rpc_run_task(&task_setup_data);
5401 if (IS_ERR(task))
5402 return PTR_ERR(task);
5403 if (!issync)
5404 goto out;
5405 status = nfs4_wait_for_completion_rpc_task(task);
5406 if (status != 0)
5407 goto out;
5408 status = data->rpc_status;
5409 if (status == 0)
5410 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5411 else
5412 nfs_refresh_inode(inode, &data->fattr);
5413out:
5414 rpc_put_task(task);
5415 return status;
5416}
5417
5418int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5419{
5420 struct nfs_server *server = NFS_SERVER(inode);
5421 struct nfs4_exception exception = { };
5422 int err;
5423 do {
5424 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5425 trace_nfs4_delegreturn(inode, err);
5426 switch (err) {
5427 case -NFS4ERR_STALE_STATEID:
5428 case -NFS4ERR_EXPIRED:
5429 case 0:
5430 return 0;
5431 }
5432 err = nfs4_handle_exception(server, err, &exception);
5433 } while (exception.retry);
5434 return err;
5435}
5436
5437#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5438#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5439
5440/*
5441 * sleep, with exponential backoff, and retry the LOCK operation.
5442 */
5443static unsigned long
5444nfs4_set_lock_task_retry(unsigned long timeout)
5445{
5446 freezable_schedule_timeout_killable_unsafe(timeout);
5447 timeout <<= 1;
5448 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5449 return NFS4_LOCK_MAXTIMEOUT;
5450 return timeout;
5451}
5452
5453static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5454{
5455 struct inode *inode = state->inode;
5456 struct nfs_server *server = NFS_SERVER(inode);
5457 struct nfs_client *clp = server->nfs_client;
5458 struct nfs_lockt_args arg = {
5459 .fh = NFS_FH(inode),
5460 .fl = request,
5461 };
5462 struct nfs_lockt_res res = {
5463 .denied = request,
5464 };
5465 struct rpc_message msg = {
5466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5467 .rpc_argp = &arg,
5468 .rpc_resp = &res,
5469 .rpc_cred = state->owner->so_cred,
5470 };
5471 struct nfs4_lock_state *lsp;
5472 int status;
5473
5474 arg.lock_owner.clientid = clp->cl_clientid;
5475 status = nfs4_set_lock_state(state, request);
5476 if (status != 0)
5477 goto out;
5478 lsp = request->fl_u.nfs4_fl.owner;
5479 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5480 arg.lock_owner.s_dev = server->s_dev;
5481 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5482 switch (status) {
5483 case 0:
5484 request->fl_type = F_UNLCK;
5485 break;
5486 case -NFS4ERR_DENIED:
5487 status = 0;
5488 }
5489 request->fl_ops->fl_release_private(request);
5490 request->fl_ops = NULL;
5491out:
5492 return status;
5493}
5494
5495static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5496{
5497 struct nfs4_exception exception = { };
5498 int err;
5499
5500 do {
5501 err = _nfs4_proc_getlk(state, cmd, request);
5502 trace_nfs4_get_lock(request, state, cmd, err);
5503 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5504 &exception);
5505 } while (exception.retry);
5506 return err;
5507}
5508
5509static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
5510{
5511 int res = 0;
5512 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5513 case FL_POSIX:
5514 res = posix_lock_inode_wait(inode, fl);
5515 break;
5516 case FL_FLOCK:
5517 res = flock_lock_inode_wait(inode, fl);
5518 break;
5519 default:
5520 BUG();
5521 }
5522 return res;
5523}
5524
5525struct nfs4_unlockdata {
5526 struct nfs_locku_args arg;
5527 struct nfs_locku_res res;
5528 struct nfs4_lock_state *lsp;
5529 struct nfs_open_context *ctx;
5530 struct file_lock fl;
5531 const struct nfs_server *server;
5532 unsigned long timestamp;
5533};
5534
5535static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5536 struct nfs_open_context *ctx,
5537 struct nfs4_lock_state *lsp,
5538 struct nfs_seqid *seqid)
5539{
5540 struct nfs4_unlockdata *p;
5541 struct inode *inode = lsp->ls_state->inode;
5542
5543 p = kzalloc(sizeof(*p), GFP_NOFS);
5544 if (p == NULL)
5545 return NULL;
5546 p->arg.fh = NFS_FH(inode);
5547 p->arg.fl = &p->fl;
5548 p->arg.seqid = seqid;
5549 p->res.seqid = seqid;
5550 p->lsp = lsp;
5551 atomic_inc(&lsp->ls_count);
5552 /* Ensure we don't close file until we're done freeing locks! */
5553 p->ctx = get_nfs_open_context(ctx);
5554 memcpy(&p->fl, fl, sizeof(p->fl));
5555 p->server = NFS_SERVER(inode);
5556 return p;
5557}
5558
5559static void nfs4_locku_release_calldata(void *data)
5560{
5561 struct nfs4_unlockdata *calldata = data;
5562 nfs_free_seqid(calldata->arg.seqid);
5563 nfs4_put_lock_state(calldata->lsp);
5564 put_nfs_open_context(calldata->ctx);
5565 kfree(calldata);
5566}
5567
5568static void nfs4_locku_done(struct rpc_task *task, void *data)
5569{
5570 struct nfs4_unlockdata *calldata = data;
5571
5572 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5573 return;
5574 switch (task->tk_status) {
5575 case 0:
5576 renew_lease(calldata->server, calldata->timestamp);
5577 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
5578 if (nfs4_update_lock_stateid(calldata->lsp,
5579 &calldata->res.stateid))
5580 break;
5581 case -NFS4ERR_BAD_STATEID:
5582 case -NFS4ERR_OLD_STATEID:
5583 case -NFS4ERR_STALE_STATEID:
5584 case -NFS4ERR_EXPIRED:
5585 if (!nfs4_stateid_match(&calldata->arg.stateid,
5586 &calldata->lsp->ls_stateid))
5587 rpc_restart_call_prepare(task);
5588 break;
5589 default:
5590 if (nfs4_async_handle_error(task, calldata->server,
5591 NULL, NULL) == -EAGAIN)
5592 rpc_restart_call_prepare(task);
5593 }
5594 nfs_release_seqid(calldata->arg.seqid);
5595}
5596
5597static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5598{
5599 struct nfs4_unlockdata *calldata = data;
5600
5601 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5602 goto out_wait;
5603 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5604 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5605 /* Note: exit _without_ running nfs4_locku_done */
5606 goto out_no_action;
5607 }
5608 calldata->timestamp = jiffies;
5609 if (nfs4_setup_sequence(calldata->server,
5610 &calldata->arg.seq_args,
5611 &calldata->res.seq_res,
5612 task) != 0)
5613 nfs_release_seqid(calldata->arg.seqid);
5614 return;
5615out_no_action:
5616 task->tk_action = NULL;
5617out_wait:
5618 nfs4_sequence_done(task, &calldata->res.seq_res);
5619}
5620
5621static const struct rpc_call_ops nfs4_locku_ops = {
5622 .rpc_call_prepare = nfs4_locku_prepare,
5623 .rpc_call_done = nfs4_locku_done,
5624 .rpc_release = nfs4_locku_release_calldata,
5625};
5626
5627static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5628 struct nfs_open_context *ctx,
5629 struct nfs4_lock_state *lsp,
5630 struct nfs_seqid *seqid)
5631{
5632 struct nfs4_unlockdata *data;
5633 struct rpc_message msg = {
5634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5635 .rpc_cred = ctx->cred,
5636 };
5637 struct rpc_task_setup task_setup_data = {
5638 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5639 .rpc_message = &msg,
5640 .callback_ops = &nfs4_locku_ops,
5641 .workqueue = nfsiod_workqueue,
5642 .flags = RPC_TASK_ASYNC,
5643 };
5644
5645 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5646 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5647
5648 /* Ensure this is an unlock - when canceling a lock, the
5649 * canceled lock is passed in, and it won't be an unlock.
5650 */
5651 fl->fl_type = F_UNLCK;
5652
5653 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5654 if (data == NULL) {
5655 nfs_free_seqid(seqid);
5656 return ERR_PTR(-ENOMEM);
5657 }
5658
5659 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5660 msg.rpc_argp = &data->arg;
5661 msg.rpc_resp = &data->res;
5662 task_setup_data.callback_data = data;
5663 return rpc_run_task(&task_setup_data);
5664}
5665
5666static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5667{
5668 struct inode *inode = state->inode;
5669 struct nfs4_state_owner *sp = state->owner;
5670 struct nfs_inode *nfsi = NFS_I(inode);
5671 struct nfs_seqid *seqid;
5672 struct nfs4_lock_state *lsp;
5673 struct rpc_task *task;
5674 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5675 int status = 0;
5676 unsigned char fl_flags = request->fl_flags;
5677
5678 status = nfs4_set_lock_state(state, request);
5679 /* Unlock _before_ we do the RPC call */
5680 request->fl_flags |= FL_EXISTS;
5681 /* Exclude nfs_delegation_claim_locks() */
5682 mutex_lock(&sp->so_delegreturn_mutex);
5683 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5684 down_read(&nfsi->rwsem);
5685 if (do_vfs_lock(inode, request) == -ENOENT) {
5686 up_read(&nfsi->rwsem);
5687 mutex_unlock(&sp->so_delegreturn_mutex);
5688 goto out;
5689 }
5690 up_read(&nfsi->rwsem);
5691 mutex_unlock(&sp->so_delegreturn_mutex);
5692 if (status != 0)
5693 goto out;
5694 /* Is this a delegated lock? */
5695 lsp = request->fl_u.nfs4_fl.owner;
5696 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5697 goto out;
5698 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5699 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5700 status = -ENOMEM;
5701 if (IS_ERR(seqid))
5702 goto out;
5703 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5704 status = PTR_ERR(task);
5705 if (IS_ERR(task))
5706 goto out;
5707 status = nfs4_wait_for_completion_rpc_task(task);
5708 rpc_put_task(task);
5709out:
5710 request->fl_flags = fl_flags;
5711 trace_nfs4_unlock(request, state, F_SETLK, status);
5712 return status;
5713}
5714
5715struct nfs4_lockdata {
5716 struct nfs_lock_args arg;
5717 struct nfs_lock_res res;
5718 struct nfs4_lock_state *lsp;
5719 struct nfs_open_context *ctx;
5720 struct file_lock fl;
5721 unsigned long timestamp;
5722 int rpc_status;
5723 int cancelled;
5724 struct nfs_server *server;
5725};
5726
5727static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5728 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5729 gfp_t gfp_mask)
5730{
5731 struct nfs4_lockdata *p;
5732 struct inode *inode = lsp->ls_state->inode;
5733 struct nfs_server *server = NFS_SERVER(inode);
5734 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5735
5736 p = kzalloc(sizeof(*p), gfp_mask);
5737 if (p == NULL)
5738 return NULL;
5739
5740 p->arg.fh = NFS_FH(inode);
5741 p->arg.fl = &p->fl;
5742 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5743 if (IS_ERR(p->arg.open_seqid))
5744 goto out_free;
5745 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5746 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5747 if (IS_ERR(p->arg.lock_seqid))
5748 goto out_free_seqid;
5749 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5750 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5751 p->arg.lock_owner.s_dev = server->s_dev;
5752 p->res.lock_seqid = p->arg.lock_seqid;
5753 p->lsp = lsp;
5754 p->server = server;
5755 atomic_inc(&lsp->ls_count);
5756 p->ctx = get_nfs_open_context(ctx);
5757 get_file(fl->fl_file);
5758 memcpy(&p->fl, fl, sizeof(p->fl));
5759 return p;
5760out_free_seqid:
5761 nfs_free_seqid(p->arg.open_seqid);
5762out_free:
5763 kfree(p);
5764 return NULL;
5765}
5766
5767static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5768{
5769 struct nfs4_lockdata *data = calldata;
5770 struct nfs4_state *state = data->lsp->ls_state;
5771
5772 dprintk("%s: begin!\n", __func__);
5773 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5774 goto out_wait;
5775 /* Do we need to do an open_to_lock_owner? */
5776 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5777 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5778 goto out_release_lock_seqid;
5779 }
5780 nfs4_stateid_copy(&data->arg.open_stateid,
5781 &state->open_stateid);
5782 data->arg.new_lock_owner = 1;
5783 data->res.open_seqid = data->arg.open_seqid;
5784 } else {
5785 data->arg.new_lock_owner = 0;
5786 nfs4_stateid_copy(&data->arg.lock_stateid,
5787 &data->lsp->ls_stateid);
5788 }
5789 if (!nfs4_valid_open_stateid(state)) {
5790 data->rpc_status = -EBADF;
5791 task->tk_action = NULL;
5792 goto out_release_open_seqid;
5793 }
5794 data->timestamp = jiffies;
5795 if (nfs4_setup_sequence(data->server,
5796 &data->arg.seq_args,
5797 &data->res.seq_res,
5798 task) == 0)
5799 return;
5800out_release_open_seqid:
5801 nfs_release_seqid(data->arg.open_seqid);
5802out_release_lock_seqid:
5803 nfs_release_seqid(data->arg.lock_seqid);
5804out_wait:
5805 nfs4_sequence_done(task, &data->res.seq_res);
5806 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5807}
5808
5809static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5810{
5811 struct nfs4_lockdata *data = calldata;
5812 struct nfs4_lock_state *lsp = data->lsp;
5813
5814 dprintk("%s: begin!\n", __func__);
5815
5816 if (!nfs4_sequence_done(task, &data->res.seq_res))
5817 return;
5818
5819 data->rpc_status = task->tk_status;
5820 switch (task->tk_status) {
5821 case 0:
5822 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
5823 data->timestamp);
5824 if (data->arg.new_lock) {
5825 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5826 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
5827 rpc_restart_call_prepare(task);
5828 break;
5829 }
5830 }
5831 if (data->arg.new_lock_owner != 0) {
5832 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5833 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5834 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5835 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5836 rpc_restart_call_prepare(task);
5837 break;
5838 case -NFS4ERR_BAD_STATEID:
5839 case -NFS4ERR_OLD_STATEID:
5840 case -NFS4ERR_STALE_STATEID:
5841 case -NFS4ERR_EXPIRED:
5842 if (data->arg.new_lock_owner != 0) {
5843 if (!nfs4_stateid_match(&data->arg.open_stateid,
5844 &lsp->ls_state->open_stateid))
5845 rpc_restart_call_prepare(task);
5846 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5847 &lsp->ls_stateid))
5848 rpc_restart_call_prepare(task);
5849 }
5850 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5851}
5852
5853static void nfs4_lock_release(void *calldata)
5854{
5855 struct nfs4_lockdata *data = calldata;
5856
5857 dprintk("%s: begin!\n", __func__);
5858 nfs_free_seqid(data->arg.open_seqid);
5859 if (data->cancelled != 0) {
5860 struct rpc_task *task;
5861 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5862 data->arg.lock_seqid);
5863 if (!IS_ERR(task))
5864 rpc_put_task_async(task);
5865 dprintk("%s: cancelling lock!\n", __func__);
5866 } else
5867 nfs_free_seqid(data->arg.lock_seqid);
5868 nfs4_put_lock_state(data->lsp);
5869 put_nfs_open_context(data->ctx);
5870 fput(data->fl.fl_file);
5871 kfree(data);
5872 dprintk("%s: done!\n", __func__);
5873}
5874
5875static const struct rpc_call_ops nfs4_lock_ops = {
5876 .rpc_call_prepare = nfs4_lock_prepare,
5877 .rpc_call_done = nfs4_lock_done,
5878 .rpc_release = nfs4_lock_release,
5879};
5880
5881static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5882{
5883 switch (error) {
5884 case -NFS4ERR_ADMIN_REVOKED:
5885 case -NFS4ERR_BAD_STATEID:
5886 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5887 if (new_lock_owner != 0 ||
5888 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5889 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5890 break;
5891 case -NFS4ERR_STALE_STATEID:
5892 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5893 case -NFS4ERR_EXPIRED:
5894 nfs4_schedule_lease_recovery(server->nfs_client);
5895 };
5896}
5897
5898static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5899{
5900 struct nfs4_lockdata *data;
5901 struct rpc_task *task;
5902 struct rpc_message msg = {
5903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5904 .rpc_cred = state->owner->so_cred,
5905 };
5906 struct rpc_task_setup task_setup_data = {
5907 .rpc_client = NFS_CLIENT(state->inode),
5908 .rpc_message = &msg,
5909 .callback_ops = &nfs4_lock_ops,
5910 .workqueue = nfsiod_workqueue,
5911 .flags = RPC_TASK_ASYNC,
5912 };
5913 int ret;
5914
5915 dprintk("%s: begin!\n", __func__);
5916 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5917 fl->fl_u.nfs4_fl.owner,
5918 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5919 if (data == NULL)
5920 return -ENOMEM;
5921 if (IS_SETLKW(cmd))
5922 data->arg.block = 1;
5923 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5924 msg.rpc_argp = &data->arg;
5925 msg.rpc_resp = &data->res;
5926 task_setup_data.callback_data = data;
5927 if (recovery_type > NFS_LOCK_NEW) {
5928 if (recovery_type == NFS_LOCK_RECLAIM)
5929 data->arg.reclaim = NFS_LOCK_RECLAIM;
5930 nfs4_set_sequence_privileged(&data->arg.seq_args);
5931 } else
5932 data->arg.new_lock = 1;
5933 task = rpc_run_task(&task_setup_data);
5934 if (IS_ERR(task))
5935 return PTR_ERR(task);
5936 ret = nfs4_wait_for_completion_rpc_task(task);
5937 if (ret == 0) {
5938 ret = data->rpc_status;
5939 if (ret)
5940 nfs4_handle_setlk_error(data->server, data->lsp,
5941 data->arg.new_lock_owner, ret);
5942 } else
5943 data->cancelled = 1;
5944 rpc_put_task(task);
5945 dprintk("%s: done, ret = %d!\n", __func__, ret);
5946 return ret;
5947}
5948
5949static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5950{
5951 struct nfs_server *server = NFS_SERVER(state->inode);
5952 struct nfs4_exception exception = {
5953 .inode = state->inode,
5954 };
5955 int err;
5956
5957 do {
5958 /* Cache the lock if possible... */
5959 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5960 return 0;
5961 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5962 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5963 if (err != -NFS4ERR_DELAY)
5964 break;
5965 nfs4_handle_exception(server, err, &exception);
5966 } while (exception.retry);
5967 return err;
5968}
5969
5970static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5971{
5972 struct nfs_server *server = NFS_SERVER(state->inode);
5973 struct nfs4_exception exception = {
5974 .inode = state->inode,
5975 };
5976 int err;
5977
5978 err = nfs4_set_lock_state(state, request);
5979 if (err != 0)
5980 return err;
5981 if (!recover_lost_locks) {
5982 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5983 return 0;
5984 }
5985 do {
5986 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5987 return 0;
5988 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5989 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5990 switch (err) {
5991 default:
5992 goto out;
5993 case -NFS4ERR_GRACE:
5994 case -NFS4ERR_DELAY:
5995 nfs4_handle_exception(server, err, &exception);
5996 err = 0;
5997 }
5998 } while (exception.retry);
5999out:
6000 return err;
6001}
6002
6003#if defined(CONFIG_NFS_V4_1)
6004/**
6005 * nfs41_check_expired_locks - possibly free a lock stateid
6006 *
6007 * @state: NFSv4 state for an inode
6008 *
6009 * Returns NFS_OK if recovery for this stateid is now finished.
6010 * Otherwise a negative NFS4ERR value is returned.
6011 */
6012static int nfs41_check_expired_locks(struct nfs4_state *state)
6013{
6014 int status, ret = -NFS4ERR_BAD_STATEID;
6015 struct nfs4_lock_state *lsp;
6016 struct nfs_server *server = NFS_SERVER(state->inode);
6017
6018 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
6019 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
6020 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6021
6022 status = nfs41_test_stateid(server,
6023 &lsp->ls_stateid,
6024 cred);
6025 trace_nfs4_test_lock_stateid(state, lsp, status);
6026 if (status != NFS_OK) {
6027 /* Free the stateid unless the server
6028 * informs us the stateid is unrecognized. */
6029 if (status != -NFS4ERR_BAD_STATEID)
6030 nfs41_free_stateid(server,
6031 &lsp->ls_stateid,
6032 cred);
6033 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6034 ret = status;
6035 }
6036 }
6037 };
6038
6039 return ret;
6040}
6041
6042static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6043{
6044 int status = NFS_OK;
6045
6046 if (test_bit(LK_STATE_IN_USE, &state->flags))
6047 status = nfs41_check_expired_locks(state);
6048 if (status != NFS_OK)
6049 status = nfs4_lock_expired(state, request);
6050 return status;
6051}
6052#endif
6053
6054static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6055{
6056 struct nfs_inode *nfsi = NFS_I(state->inode);
6057 unsigned char fl_flags = request->fl_flags;
6058 int status = -ENOLCK;
6059
6060 if ((fl_flags & FL_POSIX) &&
6061 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6062 goto out;
6063 /* Is this a delegated open? */
6064 status = nfs4_set_lock_state(state, request);
6065 if (status != 0)
6066 goto out;
6067 request->fl_flags |= FL_ACCESS;
6068 status = do_vfs_lock(state->inode, request);
6069 if (status < 0)
6070 goto out;
6071 down_read(&nfsi->rwsem);
6072 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6073 /* Yes: cache locks! */
6074 /* ...but avoid races with delegation recall... */
6075 request->fl_flags = fl_flags & ~FL_SLEEP;
6076 status = do_vfs_lock(state->inode, request);
6077 up_read(&nfsi->rwsem);
6078 goto out;
6079 }
6080 up_read(&nfsi->rwsem);
6081 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6082out:
6083 request->fl_flags = fl_flags;
6084 return status;
6085}
6086
6087static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6088{
6089 struct nfs4_exception exception = {
6090 .state = state,
6091 .inode = state->inode,
6092 };
6093 int err;
6094
6095 do {
6096 err = _nfs4_proc_setlk(state, cmd, request);
6097 trace_nfs4_set_lock(request, state, cmd, err);
6098 if (err == -NFS4ERR_DENIED)
6099 err = -EAGAIN;
6100 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6101 err, &exception);
6102 } while (exception.retry);
6103 return err;
6104}
6105
6106static int
6107nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6108{
6109 struct nfs_open_context *ctx;
6110 struct nfs4_state *state;
6111 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6112 int status;
6113
6114 /* verify open state */
6115 ctx = nfs_file_open_context(filp);
6116 state = ctx->state;
6117
6118 if (request->fl_start < 0 || request->fl_end < 0)
6119 return -EINVAL;
6120
6121 if (IS_GETLK(cmd)) {
6122 if (state != NULL)
6123 return nfs4_proc_getlk(state, F_GETLK, request);
6124 return 0;
6125 }
6126
6127 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6128 return -EINVAL;
6129
6130 if (request->fl_type == F_UNLCK) {
6131 if (state != NULL)
6132 return nfs4_proc_unlck(state, cmd, request);
6133 return 0;
6134 }
6135
6136 if (state == NULL)
6137 return -ENOLCK;
6138 /*
6139 * Don't rely on the VFS having checked the file open mode,
6140 * since it won't do this for flock() locks.
6141 */
6142 switch (request->fl_type) {
6143 case F_RDLCK:
6144 if (!(filp->f_mode & FMODE_READ))
6145 return -EBADF;
6146 break;
6147 case F_WRLCK:
6148 if (!(filp->f_mode & FMODE_WRITE))
6149 return -EBADF;
6150 }
6151
6152 do {
6153 status = nfs4_proc_setlk(state, cmd, request);
6154 if ((status != -EAGAIN) || IS_SETLK(cmd))
6155 break;
6156 timeout = nfs4_set_lock_task_retry(timeout);
6157 status = -ERESTARTSYS;
6158 if (signalled())
6159 break;
6160 } while(status < 0);
6161 return status;
6162}
6163
6164int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6165{
6166 struct nfs_server *server = NFS_SERVER(state->inode);
6167 int err;
6168
6169 err = nfs4_set_lock_state(state, fl);
6170 if (err != 0)
6171 return err;
6172 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6173 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6174}
6175
6176struct nfs_release_lockowner_data {
6177 struct nfs4_lock_state *lsp;
6178 struct nfs_server *server;
6179 struct nfs_release_lockowner_args args;
6180 struct nfs_release_lockowner_res res;
6181 unsigned long timestamp;
6182};
6183
6184static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6185{
6186 struct nfs_release_lockowner_data *data = calldata;
6187 struct nfs_server *server = data->server;
6188 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6189 &data->args.seq_args, &data->res.seq_res, task);
6190 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6191 data->timestamp = jiffies;
6192}
6193
6194static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6195{
6196 struct nfs_release_lockowner_data *data = calldata;
6197 struct nfs_server *server = data->server;
6198
6199 nfs40_sequence_done(task, &data->res.seq_res);
6200
6201 switch (task->tk_status) {
6202 case 0:
6203 renew_lease(server, data->timestamp);
6204 break;
6205 case -NFS4ERR_STALE_CLIENTID:
6206 case -NFS4ERR_EXPIRED:
6207 nfs4_schedule_lease_recovery(server->nfs_client);
6208 break;
6209 case -NFS4ERR_LEASE_MOVED:
6210 case -NFS4ERR_DELAY:
6211 if (nfs4_async_handle_error(task, server,
6212 NULL, NULL) == -EAGAIN)
6213 rpc_restart_call_prepare(task);
6214 }
6215}
6216
6217static void nfs4_release_lockowner_release(void *calldata)
6218{
6219 struct nfs_release_lockowner_data *data = calldata;
6220 nfs4_free_lock_state(data->server, data->lsp);
6221 kfree(calldata);
6222}
6223
6224static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6225 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6226 .rpc_call_done = nfs4_release_lockowner_done,
6227 .rpc_release = nfs4_release_lockowner_release,
6228};
6229
6230static void
6231nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6232{
6233 struct nfs_release_lockowner_data *data;
6234 struct rpc_message msg = {
6235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6236 };
6237
6238 if (server->nfs_client->cl_mvops->minor_version != 0)
6239 return;
6240
6241 data = kmalloc(sizeof(*data), GFP_NOFS);
6242 if (!data)
6243 return;
6244 data->lsp = lsp;
6245 data->server = server;
6246 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6247 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6248 data->args.lock_owner.s_dev = server->s_dev;
6249
6250 msg.rpc_argp = &data->args;
6251 msg.rpc_resp = &data->res;
6252 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6253 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6254}
6255
6256#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6257
6258static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6259 const void *buf, size_t buflen,
6260 int flags, int type)
6261{
6262 if (strcmp(key, "") != 0)
6263 return -EINVAL;
6264
6265 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6266}
6267
6268static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6269 void *buf, size_t buflen, int type)
6270{
6271 if (strcmp(key, "") != 0)
6272 return -EINVAL;
6273
6274 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6275}
6276
6277static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6278 size_t list_len, const char *name,
6279 size_t name_len, int type)
6280{
6281 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6282
6283 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
6284 return 0;
6285
6286 if (list && len <= list_len)
6287 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6288 return len;
6289}
6290
6291#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6292static inline int nfs4_server_supports_labels(struct nfs_server *server)
6293{
6294 return server->caps & NFS_CAP_SECURITY_LABEL;
6295}
6296
6297static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6298 const void *buf, size_t buflen,
6299 int flags, int type)
6300{
6301 if (security_ismaclabel(key))
6302 return nfs4_set_security_label(dentry, buf, buflen);
6303
6304 return -EOPNOTSUPP;
6305}
6306
6307static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6308 void *buf, size_t buflen, int type)
6309{
6310 if (security_ismaclabel(key))
6311 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
6312 return -EOPNOTSUPP;
6313}
6314
6315static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6316 size_t list_len, const char *name,
6317 size_t name_len, int type)
6318{
6319 size_t len = 0;
6320
6321 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6322 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
6323 if (list && len <= list_len)
6324 security_inode_listsecurity(d_inode(dentry), list, len);
6325 }
6326 return len;
6327}
6328
6329static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6330 .prefix = XATTR_SECURITY_PREFIX,
6331 .list = nfs4_xattr_list_nfs4_label,
6332 .get = nfs4_xattr_get_nfs4_label,
6333 .set = nfs4_xattr_set_nfs4_label,
6334};
6335#endif
6336
6337
6338/*
6339 * nfs_fhget will use either the mounted_on_fileid or the fileid
6340 */
6341static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6342{
6343 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6344 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6345 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6346 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6347 return;
6348
6349 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6350 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6351 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6352 fattr->nlink = 2;
6353}
6354
6355static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6356 const struct qstr *name,
6357 struct nfs4_fs_locations *fs_locations,
6358 struct page *page)
6359{
6360 struct nfs_server *server = NFS_SERVER(dir);
6361 u32 bitmask[3] = {
6362 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6363 };
6364 struct nfs4_fs_locations_arg args = {
6365 .dir_fh = NFS_FH(dir),
6366 .name = name,
6367 .page = page,
6368 .bitmask = bitmask,
6369 };
6370 struct nfs4_fs_locations_res res = {
6371 .fs_locations = fs_locations,
6372 };
6373 struct rpc_message msg = {
6374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6375 .rpc_argp = &args,
6376 .rpc_resp = &res,
6377 };
6378 int status;
6379
6380 dprintk("%s: start\n", __func__);
6381
6382 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6383 * is not supported */
6384 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6385 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6386 else
6387 bitmask[0] |= FATTR4_WORD0_FILEID;
6388
6389 nfs_fattr_init(&fs_locations->fattr);
6390 fs_locations->server = server;
6391 fs_locations->nlocations = 0;
6392 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6393 dprintk("%s: returned status = %d\n", __func__, status);
6394 return status;
6395}
6396
6397int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6398 const struct qstr *name,
6399 struct nfs4_fs_locations *fs_locations,
6400 struct page *page)
6401{
6402 struct nfs4_exception exception = { };
6403 int err;
6404 do {
6405 err = _nfs4_proc_fs_locations(client, dir, name,
6406 fs_locations, page);
6407 trace_nfs4_get_fs_locations(dir, name, err);
6408 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6409 &exception);
6410 } while (exception.retry);
6411 return err;
6412}
6413
6414/*
6415 * This operation also signals the server that this client is
6416 * performing migration recovery. The server can stop returning
6417 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6418 * appended to this compound to identify the client ID which is
6419 * performing recovery.
6420 */
6421static int _nfs40_proc_get_locations(struct inode *inode,
6422 struct nfs4_fs_locations *locations,
6423 struct page *page, struct rpc_cred *cred)
6424{
6425 struct nfs_server *server = NFS_SERVER(inode);
6426 struct rpc_clnt *clnt = server->client;
6427 u32 bitmask[2] = {
6428 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6429 };
6430 struct nfs4_fs_locations_arg args = {
6431 .clientid = server->nfs_client->cl_clientid,
6432 .fh = NFS_FH(inode),
6433 .page = page,
6434 .bitmask = bitmask,
6435 .migration = 1, /* skip LOOKUP */
6436 .renew = 1, /* append RENEW */
6437 };
6438 struct nfs4_fs_locations_res res = {
6439 .fs_locations = locations,
6440 .migration = 1,
6441 .renew = 1,
6442 };
6443 struct rpc_message msg = {
6444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6445 .rpc_argp = &args,
6446 .rpc_resp = &res,
6447 .rpc_cred = cred,
6448 };
6449 unsigned long now = jiffies;
6450 int status;
6451
6452 nfs_fattr_init(&locations->fattr);
6453 locations->server = server;
6454 locations->nlocations = 0;
6455
6456 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6457 nfs4_set_sequence_privileged(&args.seq_args);
6458 status = nfs4_call_sync_sequence(clnt, server, &msg,
6459 &args.seq_args, &res.seq_res);
6460 if (status)
6461 return status;
6462
6463 renew_lease(server, now);
6464 return 0;
6465}
6466
6467#ifdef CONFIG_NFS_V4_1
6468
6469/*
6470 * This operation also signals the server that this client is
6471 * performing migration recovery. The server can stop asserting
6472 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6473 * performing this operation is identified in the SEQUENCE
6474 * operation in this compound.
6475 *
6476 * When the client supports GETATTR(fs_locations_info), it can
6477 * be plumbed in here.
6478 */
6479static int _nfs41_proc_get_locations(struct inode *inode,
6480 struct nfs4_fs_locations *locations,
6481 struct page *page, struct rpc_cred *cred)
6482{
6483 struct nfs_server *server = NFS_SERVER(inode);
6484 struct rpc_clnt *clnt = server->client;
6485 u32 bitmask[2] = {
6486 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6487 };
6488 struct nfs4_fs_locations_arg args = {
6489 .fh = NFS_FH(inode),
6490 .page = page,
6491 .bitmask = bitmask,
6492 .migration = 1, /* skip LOOKUP */
6493 };
6494 struct nfs4_fs_locations_res res = {
6495 .fs_locations = locations,
6496 .migration = 1,
6497 };
6498 struct rpc_message msg = {
6499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6500 .rpc_argp = &args,
6501 .rpc_resp = &res,
6502 .rpc_cred = cred,
6503 };
6504 int status;
6505
6506 nfs_fattr_init(&locations->fattr);
6507 locations->server = server;
6508 locations->nlocations = 0;
6509
6510 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6511 nfs4_set_sequence_privileged(&args.seq_args);
6512 status = nfs4_call_sync_sequence(clnt, server, &msg,
6513 &args.seq_args, &res.seq_res);
6514 if (status == NFS4_OK &&
6515 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6516 status = -NFS4ERR_LEASE_MOVED;
6517 return status;
6518}
6519
6520#endif /* CONFIG_NFS_V4_1 */
6521
6522/**
6523 * nfs4_proc_get_locations - discover locations for a migrated FSID
6524 * @inode: inode on FSID that is migrating
6525 * @locations: result of query
6526 * @page: buffer
6527 * @cred: credential to use for this operation
6528 *
6529 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6530 * operation failed, or a negative errno if a local error occurred.
6531 *
6532 * On success, "locations" is filled in, but if the server has
6533 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6534 * asserted.
6535 *
6536 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6537 * from this client that require migration recovery.
6538 */
6539int nfs4_proc_get_locations(struct inode *inode,
6540 struct nfs4_fs_locations *locations,
6541 struct page *page, struct rpc_cred *cred)
6542{
6543 struct nfs_server *server = NFS_SERVER(inode);
6544 struct nfs_client *clp = server->nfs_client;
6545 const struct nfs4_mig_recovery_ops *ops =
6546 clp->cl_mvops->mig_recovery_ops;
6547 struct nfs4_exception exception = { };
6548 int status;
6549
6550 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6551 (unsigned long long)server->fsid.major,
6552 (unsigned long long)server->fsid.minor,
6553 clp->cl_hostname);
6554 nfs_display_fhandle(NFS_FH(inode), __func__);
6555
6556 do {
6557 status = ops->get_locations(inode, locations, page, cred);
6558 if (status != -NFS4ERR_DELAY)
6559 break;
6560 nfs4_handle_exception(server, status, &exception);
6561 } while (exception.retry);
6562 return status;
6563}
6564
6565/*
6566 * This operation also signals the server that this client is
6567 * performing "lease moved" recovery. The server can stop
6568 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6569 * is appended to this compound to identify the client ID which is
6570 * performing recovery.
6571 */
6572static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6573{
6574 struct nfs_server *server = NFS_SERVER(inode);
6575 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6576 struct rpc_clnt *clnt = server->client;
6577 struct nfs4_fsid_present_arg args = {
6578 .fh = NFS_FH(inode),
6579 .clientid = clp->cl_clientid,
6580 .renew = 1, /* append RENEW */
6581 };
6582 struct nfs4_fsid_present_res res = {
6583 .renew = 1,
6584 };
6585 struct rpc_message msg = {
6586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6587 .rpc_argp = &args,
6588 .rpc_resp = &res,
6589 .rpc_cred = cred,
6590 };
6591 unsigned long now = jiffies;
6592 int status;
6593
6594 res.fh = nfs_alloc_fhandle();
6595 if (res.fh == NULL)
6596 return -ENOMEM;
6597
6598 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6599 nfs4_set_sequence_privileged(&args.seq_args);
6600 status = nfs4_call_sync_sequence(clnt, server, &msg,
6601 &args.seq_args, &res.seq_res);
6602 nfs_free_fhandle(res.fh);
6603 if (status)
6604 return status;
6605
6606 do_renew_lease(clp, now);
6607 return 0;
6608}
6609
6610#ifdef CONFIG_NFS_V4_1
6611
6612/*
6613 * This operation also signals the server that this client is
6614 * performing "lease moved" recovery. The server can stop asserting
6615 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6616 * this operation is identified in the SEQUENCE operation in this
6617 * compound.
6618 */
6619static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6620{
6621 struct nfs_server *server = NFS_SERVER(inode);
6622 struct rpc_clnt *clnt = server->client;
6623 struct nfs4_fsid_present_arg args = {
6624 .fh = NFS_FH(inode),
6625 };
6626 struct nfs4_fsid_present_res res = {
6627 };
6628 struct rpc_message msg = {
6629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6630 .rpc_argp = &args,
6631 .rpc_resp = &res,
6632 .rpc_cred = cred,
6633 };
6634 int status;
6635
6636 res.fh = nfs_alloc_fhandle();
6637 if (res.fh == NULL)
6638 return -ENOMEM;
6639
6640 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6641 nfs4_set_sequence_privileged(&args.seq_args);
6642 status = nfs4_call_sync_sequence(clnt, server, &msg,
6643 &args.seq_args, &res.seq_res);
6644 nfs_free_fhandle(res.fh);
6645 if (status == NFS4_OK &&
6646 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6647 status = -NFS4ERR_LEASE_MOVED;
6648 return status;
6649}
6650
6651#endif /* CONFIG_NFS_V4_1 */
6652
6653/**
6654 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6655 * @inode: inode on FSID to check
6656 * @cred: credential to use for this operation
6657 *
6658 * Server indicates whether the FSID is present, moved, or not
6659 * recognized. This operation is necessary to clear a LEASE_MOVED
6660 * condition for this client ID.
6661 *
6662 * Returns NFS4_OK if the FSID is present on this server,
6663 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6664 * NFS4ERR code if some error occurred on the server, or a
6665 * negative errno if a local failure occurred.
6666 */
6667int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6668{
6669 struct nfs_server *server = NFS_SERVER(inode);
6670 struct nfs_client *clp = server->nfs_client;
6671 const struct nfs4_mig_recovery_ops *ops =
6672 clp->cl_mvops->mig_recovery_ops;
6673 struct nfs4_exception exception = { };
6674 int status;
6675
6676 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6677 (unsigned long long)server->fsid.major,
6678 (unsigned long long)server->fsid.minor,
6679 clp->cl_hostname);
6680 nfs_display_fhandle(NFS_FH(inode), __func__);
6681
6682 do {
6683 status = ops->fsid_present(inode, cred);
6684 if (status != -NFS4ERR_DELAY)
6685 break;
6686 nfs4_handle_exception(server, status, &exception);
6687 } while (exception.retry);
6688 return status;
6689}
6690
6691/**
6692 * If 'use_integrity' is true and the state managment nfs_client
6693 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6694 * and the machine credential as per RFC3530bis and RFC5661 Security
6695 * Considerations sections. Otherwise, just use the user cred with the
6696 * filesystem's rpc_client.
6697 */
6698static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6699{
6700 int status;
6701 struct nfs4_secinfo_arg args = {
6702 .dir_fh = NFS_FH(dir),
6703 .name = name,
6704 };
6705 struct nfs4_secinfo_res res = {
6706 .flavors = flavors,
6707 };
6708 struct rpc_message msg = {
6709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6710 .rpc_argp = &args,
6711 .rpc_resp = &res,
6712 };
6713 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6714 struct rpc_cred *cred = NULL;
6715
6716 if (use_integrity) {
6717 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6718 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6719 msg.rpc_cred = cred;
6720 }
6721
6722 dprintk("NFS call secinfo %s\n", name->name);
6723
6724 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6725 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6726
6727 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6728 &res.seq_res, 0);
6729 dprintk("NFS reply secinfo: %d\n", status);
6730
6731 if (cred)
6732 put_rpccred(cred);
6733
6734 return status;
6735}
6736
6737int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6738 struct nfs4_secinfo_flavors *flavors)
6739{
6740 struct nfs4_exception exception = { };
6741 int err;
6742 do {
6743 err = -NFS4ERR_WRONGSEC;
6744
6745 /* try to use integrity protection with machine cred */
6746 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6747 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6748
6749 /*
6750 * if unable to use integrity protection, or SECINFO with
6751 * integrity protection returns NFS4ERR_WRONGSEC (which is
6752 * disallowed by spec, but exists in deployed servers) use
6753 * the current filesystem's rpc_client and the user cred.
6754 */
6755 if (err == -NFS4ERR_WRONGSEC)
6756 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6757
6758 trace_nfs4_secinfo(dir, name, err);
6759 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6760 &exception);
6761 } while (exception.retry);
6762 return err;
6763}
6764
6765#ifdef CONFIG_NFS_V4_1
6766/*
6767 * Check the exchange flags returned by the server for invalid flags, having
6768 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6769 * DS flags set.
6770 */
6771static int nfs4_check_cl_exchange_flags(u32 flags)
6772{
6773 if (flags & ~EXCHGID4_FLAG_MASK_R)
6774 goto out_inval;
6775 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6776 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6777 goto out_inval;
6778 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6779 goto out_inval;
6780 return NFS_OK;
6781out_inval:
6782 return -NFS4ERR_INVAL;
6783}
6784
6785static bool
6786nfs41_same_server_scope(struct nfs41_server_scope *a,
6787 struct nfs41_server_scope *b)
6788{
6789 if (a->server_scope_sz == b->server_scope_sz &&
6790 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6791 return true;
6792
6793 return false;
6794}
6795
6796/*
6797 * nfs4_proc_bind_conn_to_session()
6798 *
6799 * The 4.1 client currently uses the same TCP connection for the
6800 * fore and backchannel.
6801 */
6802int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6803{
6804 int status;
6805 struct nfs41_bind_conn_to_session_args args = {
6806 .client = clp,
6807 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6808 };
6809 struct nfs41_bind_conn_to_session_res res;
6810 struct rpc_message msg = {
6811 .rpc_proc =
6812 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6813 .rpc_argp = &args,
6814 .rpc_resp = &res,
6815 .rpc_cred = cred,
6816 };
6817
6818 dprintk("--> %s\n", __func__);
6819
6820 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6821 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6822 args.dir = NFS4_CDFC4_FORE;
6823
6824 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6825 trace_nfs4_bind_conn_to_session(clp, status);
6826 if (status == 0) {
6827 if (memcmp(res.sessionid.data,
6828 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6829 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6830 status = -EIO;
6831 goto out;
6832 }
6833 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6834 dprintk("NFS: %s: Unexpected direction from server\n",
6835 __func__);
6836 status = -EIO;
6837 goto out;
6838 }
6839 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6840 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6841 __func__);
6842 status = -EIO;
6843 goto out;
6844 }
6845 }
6846out:
6847 dprintk("<-- %s status= %d\n", __func__, status);
6848 return status;
6849}
6850
6851/*
6852 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6853 * and operations we'd like to see to enable certain features in the allow map
6854 */
6855static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6856 .how = SP4_MACH_CRED,
6857 .enforce.u.words = {
6858 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6859 1 << (OP_EXCHANGE_ID - 32) |
6860 1 << (OP_CREATE_SESSION - 32) |
6861 1 << (OP_DESTROY_SESSION - 32) |
6862 1 << (OP_DESTROY_CLIENTID - 32)
6863 },
6864 .allow.u.words = {
6865 [0] = 1 << (OP_CLOSE) |
6866 1 << (OP_LOCKU) |
6867 1 << (OP_COMMIT),
6868 [1] = 1 << (OP_SECINFO - 32) |
6869 1 << (OP_SECINFO_NO_NAME - 32) |
6870 1 << (OP_TEST_STATEID - 32) |
6871 1 << (OP_FREE_STATEID - 32) |
6872 1 << (OP_WRITE - 32)
6873 }
6874};
6875
6876/*
6877 * Select the state protection mode for client `clp' given the server results
6878 * from exchange_id in `sp'.
6879 *
6880 * Returns 0 on success, negative errno otherwise.
6881 */
6882static int nfs4_sp4_select_mode(struct nfs_client *clp,
6883 struct nfs41_state_protection *sp)
6884{
6885 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6886 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6887 1 << (OP_EXCHANGE_ID - 32) |
6888 1 << (OP_CREATE_SESSION - 32) |
6889 1 << (OP_DESTROY_SESSION - 32) |
6890 1 << (OP_DESTROY_CLIENTID - 32)
6891 };
6892 unsigned int i;
6893
6894 if (sp->how == SP4_MACH_CRED) {
6895 /* Print state protect result */
6896 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6897 for (i = 0; i <= LAST_NFS4_OP; i++) {
6898 if (test_bit(i, sp->enforce.u.longs))
6899 dfprintk(MOUNT, " enforce op %d\n", i);
6900 if (test_bit(i, sp->allow.u.longs))
6901 dfprintk(MOUNT, " allow op %d\n", i);
6902 }
6903
6904 /* make sure nothing is on enforce list that isn't supported */
6905 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6906 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6907 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6908 return -EINVAL;
6909 }
6910 }
6911
6912 /*
6913 * Minimal mode - state operations are allowed to use machine
6914 * credential. Note this already happens by default, so the
6915 * client doesn't have to do anything more than the negotiation.
6916 *
6917 * NOTE: we don't care if EXCHANGE_ID is in the list -
6918 * we're already using the machine cred for exchange_id
6919 * and will never use a different cred.
6920 */
6921 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6922 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6923 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6924 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6925 dfprintk(MOUNT, "sp4_mach_cred:\n");
6926 dfprintk(MOUNT, " minimal mode enabled\n");
6927 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6928 } else {
6929 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6930 return -EINVAL;
6931 }
6932
6933 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6934 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6935 dfprintk(MOUNT, " cleanup mode enabled\n");
6936 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6937 }
6938
6939 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6940 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6941 dfprintk(MOUNT, " secinfo mode enabled\n");
6942 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6943 }
6944
6945 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6946 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6947 dfprintk(MOUNT, " stateid mode enabled\n");
6948 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6949 }
6950
6951 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6952 dfprintk(MOUNT, " write mode enabled\n");
6953 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6954 }
6955
6956 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6957 dfprintk(MOUNT, " commit mode enabled\n");
6958 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6959 }
6960 }
6961
6962 return 0;
6963}
6964
6965/*
6966 * _nfs4_proc_exchange_id()
6967 *
6968 * Wrapper for EXCHANGE_ID operation.
6969 */
6970static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6971 u32 sp4_how)
6972{
6973 nfs4_verifier verifier;
6974 struct nfs41_exchange_id_args args = {
6975 .verifier = &verifier,
6976 .client = clp,
6977#ifdef CONFIG_NFS_V4_1_MIGRATION
6978 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6979 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6980 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6981#else
6982 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6983 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6984#endif
6985 };
6986 struct nfs41_exchange_id_res res = {
6987 0
6988 };
6989 int status;
6990 struct rpc_message msg = {
6991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6992 .rpc_argp = &args,
6993 .rpc_resp = &res,
6994 .rpc_cred = cred,
6995 };
6996
6997 nfs4_init_boot_verifier(clp, &verifier);
6998
6999 status = nfs4_init_uniform_client_string(clp);
7000 if (status)
7001 goto out;
7002
7003 dprintk("NFS call exchange_id auth=%s, '%s'\n",
7004 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7005 clp->cl_owner_id);
7006
7007 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7008 GFP_NOFS);
7009 if (unlikely(res.server_owner == NULL)) {
7010 status = -ENOMEM;
7011 goto out;
7012 }
7013
7014 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7015 GFP_NOFS);
7016 if (unlikely(res.server_scope == NULL)) {
7017 status = -ENOMEM;
7018 goto out_server_owner;
7019 }
7020
7021 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7022 if (unlikely(res.impl_id == NULL)) {
7023 status = -ENOMEM;
7024 goto out_server_scope;
7025 }
7026
7027 switch (sp4_how) {
7028 case SP4_NONE:
7029 args.state_protect.how = SP4_NONE;
7030 break;
7031
7032 case SP4_MACH_CRED:
7033 args.state_protect = nfs4_sp4_mach_cred_request;
7034 break;
7035
7036 default:
7037 /* unsupported! */
7038 WARN_ON_ONCE(1);
7039 status = -EINVAL;
7040 goto out_impl_id;
7041 }
7042
7043 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7044 trace_nfs4_exchange_id(clp, status);
7045 if (status == 0)
7046 status = nfs4_check_cl_exchange_flags(res.flags);
7047
7048 if (status == 0)
7049 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7050
7051 if (status == 0) {
7052 clp->cl_clientid = res.clientid;
7053 clp->cl_exchange_flags = res.flags;
7054 /* Client ID is not confirmed */
7055 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7056 clear_bit(NFS4_SESSION_ESTABLISHED,
7057 &clp->cl_session->session_state);
7058 clp->cl_seqid = res.seqid;
7059 }
7060
7061 kfree(clp->cl_serverowner);
7062 clp->cl_serverowner = res.server_owner;
7063 res.server_owner = NULL;
7064
7065 /* use the most recent implementation id */
7066 kfree(clp->cl_implid);
7067 clp->cl_implid = res.impl_id;
7068 res.impl_id = NULL;
7069
7070 if (clp->cl_serverscope != NULL &&
7071 !nfs41_same_server_scope(clp->cl_serverscope,
7072 res.server_scope)) {
7073 dprintk("%s: server_scope mismatch detected\n",
7074 __func__);
7075 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7076 kfree(clp->cl_serverscope);
7077 clp->cl_serverscope = NULL;
7078 }
7079
7080 if (clp->cl_serverscope == NULL) {
7081 clp->cl_serverscope = res.server_scope;
7082 res.server_scope = NULL;
7083 }
7084 }
7085
7086out_impl_id:
7087 kfree(res.impl_id);
7088out_server_scope:
7089 kfree(res.server_scope);
7090out_server_owner:
7091 kfree(res.server_owner);
7092out:
7093 if (clp->cl_implid != NULL)
7094 dprintk("NFS reply exchange_id: Server Implementation ID: "
7095 "domain: %s, name: %s, date: %llu,%u\n",
7096 clp->cl_implid->domain, clp->cl_implid->name,
7097 clp->cl_implid->date.seconds,
7098 clp->cl_implid->date.nseconds);
7099 dprintk("NFS reply exchange_id: %d\n", status);
7100 return status;
7101}
7102
7103/*
7104 * nfs4_proc_exchange_id()
7105 *
7106 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7107 *
7108 * Since the clientid has expired, all compounds using sessions
7109 * associated with the stale clientid will be returning
7110 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7111 * be in some phase of session reset.
7112 *
7113 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7114 */
7115int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7116{
7117 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7118 int status;
7119
7120 /* try SP4_MACH_CRED if krb5i/p */
7121 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7122 authflavor == RPC_AUTH_GSS_KRB5P) {
7123 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7124 if (!status)
7125 return 0;
7126 }
7127
7128 /* try SP4_NONE */
7129 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7130}
7131
7132static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7133 struct rpc_cred *cred)
7134{
7135 struct rpc_message msg = {
7136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7137 .rpc_argp = clp,
7138 .rpc_cred = cred,
7139 };
7140 int status;
7141
7142 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7143 trace_nfs4_destroy_clientid(clp, status);
7144 if (status)
7145 dprintk("NFS: Got error %d from the server %s on "
7146 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7147 return status;
7148}
7149
7150static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7151 struct rpc_cred *cred)
7152{
7153 unsigned int loop;
7154 int ret;
7155
7156 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7157 ret = _nfs4_proc_destroy_clientid(clp, cred);
7158 switch (ret) {
7159 case -NFS4ERR_DELAY:
7160 case -NFS4ERR_CLIENTID_BUSY:
7161 ssleep(1);
7162 break;
7163 default:
7164 return ret;
7165 }
7166 }
7167 return 0;
7168}
7169
7170int nfs4_destroy_clientid(struct nfs_client *clp)
7171{
7172 struct rpc_cred *cred;
7173 int ret = 0;
7174
7175 if (clp->cl_mvops->minor_version < 1)
7176 goto out;
7177 if (clp->cl_exchange_flags == 0)
7178 goto out;
7179 if (clp->cl_preserve_clid)
7180 goto out;
7181 cred = nfs4_get_clid_cred(clp);
7182 ret = nfs4_proc_destroy_clientid(clp, cred);
7183 if (cred)
7184 put_rpccred(cred);
7185 switch (ret) {
7186 case 0:
7187 case -NFS4ERR_STALE_CLIENTID:
7188 clp->cl_exchange_flags = 0;
7189 }
7190out:
7191 return ret;
7192}
7193
7194struct nfs4_get_lease_time_data {
7195 struct nfs4_get_lease_time_args *args;
7196 struct nfs4_get_lease_time_res *res;
7197 struct nfs_client *clp;
7198};
7199
7200static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7201 void *calldata)
7202{
7203 struct nfs4_get_lease_time_data *data =
7204 (struct nfs4_get_lease_time_data *)calldata;
7205
7206 dprintk("--> %s\n", __func__);
7207 /* just setup sequence, do not trigger session recovery
7208 since we're invoked within one */
7209 nfs41_setup_sequence(data->clp->cl_session,
7210 &data->args->la_seq_args,
7211 &data->res->lr_seq_res,
7212 task);
7213 dprintk("<-- %s\n", __func__);
7214}
7215
7216/*
7217 * Called from nfs4_state_manager thread for session setup, so don't recover
7218 * from sequence operation or clientid errors.
7219 */
7220static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7221{
7222 struct nfs4_get_lease_time_data *data =
7223 (struct nfs4_get_lease_time_data *)calldata;
7224
7225 dprintk("--> %s\n", __func__);
7226 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7227 return;
7228 switch (task->tk_status) {
7229 case -NFS4ERR_DELAY:
7230 case -NFS4ERR_GRACE:
7231 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7232 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7233 task->tk_status = 0;
7234 /* fall through */
7235 case -NFS4ERR_RETRY_UNCACHED_REP:
7236 rpc_restart_call_prepare(task);
7237 return;
7238 }
7239 dprintk("<-- %s\n", __func__);
7240}
7241
7242static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7243 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7244 .rpc_call_done = nfs4_get_lease_time_done,
7245};
7246
7247int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7248{
7249 struct rpc_task *task;
7250 struct nfs4_get_lease_time_args args;
7251 struct nfs4_get_lease_time_res res = {
7252 .lr_fsinfo = fsinfo,
7253 };
7254 struct nfs4_get_lease_time_data data = {
7255 .args = &args,
7256 .res = &res,
7257 .clp = clp,
7258 };
7259 struct rpc_message msg = {
7260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7261 .rpc_argp = &args,
7262 .rpc_resp = &res,
7263 };
7264 struct rpc_task_setup task_setup = {
7265 .rpc_client = clp->cl_rpcclient,
7266 .rpc_message = &msg,
7267 .callback_ops = &nfs4_get_lease_time_ops,
7268 .callback_data = &data,
7269 .flags = RPC_TASK_TIMEOUT,
7270 };
7271 int status;
7272
7273 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7274 nfs4_set_sequence_privileged(&args.la_seq_args);
7275 dprintk("--> %s\n", __func__);
7276 task = rpc_run_task(&task_setup);
7277
7278 if (IS_ERR(task))
7279 status = PTR_ERR(task);
7280 else {
7281 status = task->tk_status;
7282 rpc_put_task(task);
7283 }
7284 dprintk("<-- %s return %d\n", __func__, status);
7285
7286 return status;
7287}
7288
7289/*
7290 * Initialize the values to be used by the client in CREATE_SESSION
7291 * If nfs4_init_session set the fore channel request and response sizes,
7292 * use them.
7293 *
7294 * Set the back channel max_resp_sz_cached to zero to force the client to
7295 * always set csa_cachethis to FALSE because the current implementation
7296 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7297 */
7298static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7299{
7300 unsigned int max_rqst_sz, max_resp_sz;
7301
7302 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7303 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7304
7305 /* Fore channel attributes */
7306 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7307 args->fc_attrs.max_resp_sz = max_resp_sz;
7308 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7309 args->fc_attrs.max_reqs = max_session_slots;
7310
7311 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7312 "max_ops=%u max_reqs=%u\n",
7313 __func__,
7314 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7315 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7316
7317 /* Back channel attributes */
7318 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7319 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7320 args->bc_attrs.max_resp_sz_cached = 0;
7321 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7322 args->bc_attrs.max_reqs = 1;
7323
7324 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7325 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7326 __func__,
7327 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7328 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7329 args->bc_attrs.max_reqs);
7330}
7331
7332static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7333 struct nfs41_create_session_res *res)
7334{
7335 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7336 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7337
7338 if (rcvd->max_resp_sz > sent->max_resp_sz)
7339 return -EINVAL;
7340 /*
7341 * Our requested max_ops is the minimum we need; we're not
7342 * prepared to break up compounds into smaller pieces than that.
7343 * So, no point even trying to continue if the server won't
7344 * cooperate:
7345 */
7346 if (rcvd->max_ops < sent->max_ops)
7347 return -EINVAL;
7348 if (rcvd->max_reqs == 0)
7349 return -EINVAL;
7350 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7351 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7352 return 0;
7353}
7354
7355static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7356 struct nfs41_create_session_res *res)
7357{
7358 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7359 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7360
7361 if (!(res->flags & SESSION4_BACK_CHAN))
7362 goto out;
7363 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7364 return -EINVAL;
7365 if (rcvd->max_resp_sz < sent->max_resp_sz)
7366 return -EINVAL;
7367 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7368 return -EINVAL;
7369 /* These would render the backchannel useless: */
7370 if (rcvd->max_ops != sent->max_ops)
7371 return -EINVAL;
7372 if (rcvd->max_reqs != sent->max_reqs)
7373 return -EINVAL;
7374out:
7375 return 0;
7376}
7377
7378static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7379 struct nfs41_create_session_res *res)
7380{
7381 int ret;
7382
7383 ret = nfs4_verify_fore_channel_attrs(args, res);
7384 if (ret)
7385 return ret;
7386 return nfs4_verify_back_channel_attrs(args, res);
7387}
7388
7389static void nfs4_update_session(struct nfs4_session *session,
7390 struct nfs41_create_session_res *res)
7391{
7392 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7393 /* Mark client id and session as being confirmed */
7394 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7395 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7396 session->flags = res->flags;
7397 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7398 if (res->flags & SESSION4_BACK_CHAN)
7399 memcpy(&session->bc_attrs, &res->bc_attrs,
7400 sizeof(session->bc_attrs));
7401}
7402
7403static int _nfs4_proc_create_session(struct nfs_client *clp,
7404 struct rpc_cred *cred)
7405{
7406 struct nfs4_session *session = clp->cl_session;
7407 struct nfs41_create_session_args args = {
7408 .client = clp,
7409 .clientid = clp->cl_clientid,
7410 .seqid = clp->cl_seqid,
7411 .cb_program = NFS4_CALLBACK,
7412 };
7413 struct nfs41_create_session_res res;
7414
7415 struct rpc_message msg = {
7416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7417 .rpc_argp = &args,
7418 .rpc_resp = &res,
7419 .rpc_cred = cred,
7420 };
7421 int status;
7422
7423 nfs4_init_channel_attrs(&args);
7424 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7425
7426 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7427 trace_nfs4_create_session(clp, status);
7428
7429 if (!status) {
7430 /* Verify the session's negotiated channel_attrs values */
7431 status = nfs4_verify_channel_attrs(&args, &res);
7432 /* Increment the clientid slot sequence id */
7433 if (clp->cl_seqid == res.seqid)
7434 clp->cl_seqid++;
7435 if (status)
7436 goto out;
7437 nfs4_update_session(session, &res);
7438 }
7439out:
7440 return status;
7441}
7442
7443/*
7444 * Issues a CREATE_SESSION operation to the server.
7445 * It is the responsibility of the caller to verify the session is
7446 * expired before calling this routine.
7447 */
7448int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7449{
7450 int status;
7451 unsigned *ptr;
7452 struct nfs4_session *session = clp->cl_session;
7453
7454 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7455
7456 status = _nfs4_proc_create_session(clp, cred);
7457 if (status)
7458 goto out;
7459
7460 /* Init or reset the session slot tables */
7461 status = nfs4_setup_session_slot_tables(session);
7462 dprintk("slot table setup returned %d\n", status);
7463 if (status)
7464 goto out;
7465
7466 ptr = (unsigned *)&session->sess_id.data[0];
7467 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7468 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7469out:
7470 dprintk("<-- %s\n", __func__);
7471 return status;
7472}
7473
7474/*
7475 * Issue the over-the-wire RPC DESTROY_SESSION.
7476 * The caller must serialize access to this routine.
7477 */
7478int nfs4_proc_destroy_session(struct nfs4_session *session,
7479 struct rpc_cred *cred)
7480{
7481 struct rpc_message msg = {
7482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7483 .rpc_argp = session,
7484 .rpc_cred = cred,
7485 };
7486 int status = 0;
7487
7488 dprintk("--> nfs4_proc_destroy_session\n");
7489
7490 /* session is still being setup */
7491 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7492 return 0;
7493
7494 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7495 trace_nfs4_destroy_session(session->clp, status);
7496
7497 if (status)
7498 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7499 "Session has been destroyed regardless...\n", status);
7500
7501 dprintk("<-- nfs4_proc_destroy_session\n");
7502 return status;
7503}
7504
7505/*
7506 * Renew the cl_session lease.
7507 */
7508struct nfs4_sequence_data {
7509 struct nfs_client *clp;
7510 struct nfs4_sequence_args args;
7511 struct nfs4_sequence_res res;
7512};
7513
7514static void nfs41_sequence_release(void *data)
7515{
7516 struct nfs4_sequence_data *calldata = data;
7517 struct nfs_client *clp = calldata->clp;
7518
7519 if (atomic_read(&clp->cl_count) > 1)
7520 nfs4_schedule_state_renewal(clp);
7521 nfs_put_client(clp);
7522 kfree(calldata);
7523}
7524
7525static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7526{
7527 switch(task->tk_status) {
7528 case -NFS4ERR_DELAY:
7529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7530 return -EAGAIN;
7531 default:
7532 nfs4_schedule_lease_recovery(clp);
7533 }
7534 return 0;
7535}
7536
7537static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7538{
7539 struct nfs4_sequence_data *calldata = data;
7540 struct nfs_client *clp = calldata->clp;
7541
7542 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7543 return;
7544
7545 trace_nfs4_sequence(clp, task->tk_status);
7546 if (task->tk_status < 0) {
7547 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7548 if (atomic_read(&clp->cl_count) == 1)
7549 goto out;
7550
7551 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7552 rpc_restart_call_prepare(task);
7553 return;
7554 }
7555 }
7556 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7557out:
7558 dprintk("<-- %s\n", __func__);
7559}
7560
7561static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7562{
7563 struct nfs4_sequence_data *calldata = data;
7564 struct nfs_client *clp = calldata->clp;
7565 struct nfs4_sequence_args *args;
7566 struct nfs4_sequence_res *res;
7567
7568 args = task->tk_msg.rpc_argp;
7569 res = task->tk_msg.rpc_resp;
7570
7571 nfs41_setup_sequence(clp->cl_session, args, res, task);
7572}
7573
7574static const struct rpc_call_ops nfs41_sequence_ops = {
7575 .rpc_call_done = nfs41_sequence_call_done,
7576 .rpc_call_prepare = nfs41_sequence_prepare,
7577 .rpc_release = nfs41_sequence_release,
7578};
7579
7580static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7581 struct rpc_cred *cred,
7582 bool is_privileged)
7583{
7584 struct nfs4_sequence_data *calldata;
7585 struct rpc_message msg = {
7586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7587 .rpc_cred = cred,
7588 };
7589 struct rpc_task_setup task_setup_data = {
7590 .rpc_client = clp->cl_rpcclient,
7591 .rpc_message = &msg,
7592 .callback_ops = &nfs41_sequence_ops,
7593 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7594 };
7595
7596 if (!atomic_inc_not_zero(&clp->cl_count))
7597 return ERR_PTR(-EIO);
7598 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7599 if (calldata == NULL) {
7600 nfs_put_client(clp);
7601 return ERR_PTR(-ENOMEM);
7602 }
7603 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7604 if (is_privileged)
7605 nfs4_set_sequence_privileged(&calldata->args);
7606 msg.rpc_argp = &calldata->args;
7607 msg.rpc_resp = &calldata->res;
7608 calldata->clp = clp;
7609 task_setup_data.callback_data = calldata;
7610
7611 return rpc_run_task(&task_setup_data);
7612}
7613
7614static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7615{
7616 struct rpc_task *task;
7617 int ret = 0;
7618
7619 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7620 return -EAGAIN;
7621 task = _nfs41_proc_sequence(clp, cred, false);
7622 if (IS_ERR(task))
7623 ret = PTR_ERR(task);
7624 else
7625 rpc_put_task_async(task);
7626 dprintk("<-- %s status=%d\n", __func__, ret);
7627 return ret;
7628}
7629
7630static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7631{
7632 struct rpc_task *task;
7633 int ret;
7634
7635 task = _nfs41_proc_sequence(clp, cred, true);
7636 if (IS_ERR(task)) {
7637 ret = PTR_ERR(task);
7638 goto out;
7639 }
7640 ret = rpc_wait_for_completion_task(task);
7641 if (!ret)
7642 ret = task->tk_status;
7643 rpc_put_task(task);
7644out:
7645 dprintk("<-- %s status=%d\n", __func__, ret);
7646 return ret;
7647}
7648
7649struct nfs4_reclaim_complete_data {
7650 struct nfs_client *clp;
7651 struct nfs41_reclaim_complete_args arg;
7652 struct nfs41_reclaim_complete_res res;
7653};
7654
7655static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7656{
7657 struct nfs4_reclaim_complete_data *calldata = data;
7658
7659 nfs41_setup_sequence(calldata->clp->cl_session,
7660 &calldata->arg.seq_args,
7661 &calldata->res.seq_res,
7662 task);
7663}
7664
7665static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7666{
7667 switch(task->tk_status) {
7668 case 0:
7669 case -NFS4ERR_COMPLETE_ALREADY:
7670 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7671 break;
7672 case -NFS4ERR_DELAY:
7673 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7674 /* fall through */
7675 case -NFS4ERR_RETRY_UNCACHED_REP:
7676 return -EAGAIN;
7677 default:
7678 nfs4_schedule_lease_recovery(clp);
7679 }
7680 return 0;
7681}
7682
7683static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7684{
7685 struct nfs4_reclaim_complete_data *calldata = data;
7686 struct nfs_client *clp = calldata->clp;
7687 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7688
7689 dprintk("--> %s\n", __func__);
7690 if (!nfs41_sequence_done(task, res))
7691 return;
7692
7693 trace_nfs4_reclaim_complete(clp, task->tk_status);
7694 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7695 rpc_restart_call_prepare(task);
7696 return;
7697 }
7698 dprintk("<-- %s\n", __func__);
7699}
7700
7701static void nfs4_free_reclaim_complete_data(void *data)
7702{
7703 struct nfs4_reclaim_complete_data *calldata = data;
7704
7705 kfree(calldata);
7706}
7707
7708static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7709 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7710 .rpc_call_done = nfs4_reclaim_complete_done,
7711 .rpc_release = nfs4_free_reclaim_complete_data,
7712};
7713
7714/*
7715 * Issue a global reclaim complete.
7716 */
7717static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7718 struct rpc_cred *cred)
7719{
7720 struct nfs4_reclaim_complete_data *calldata;
7721 struct rpc_task *task;
7722 struct rpc_message msg = {
7723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7724 .rpc_cred = cred,
7725 };
7726 struct rpc_task_setup task_setup_data = {
7727 .rpc_client = clp->cl_rpcclient,
7728 .rpc_message = &msg,
7729 .callback_ops = &nfs4_reclaim_complete_call_ops,
7730 .flags = RPC_TASK_ASYNC,
7731 };
7732 int status = -ENOMEM;
7733
7734 dprintk("--> %s\n", __func__);
7735 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7736 if (calldata == NULL)
7737 goto out;
7738 calldata->clp = clp;
7739 calldata->arg.one_fs = 0;
7740
7741 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7742 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7743 msg.rpc_argp = &calldata->arg;
7744 msg.rpc_resp = &calldata->res;
7745 task_setup_data.callback_data = calldata;
7746 task = rpc_run_task(&task_setup_data);
7747 if (IS_ERR(task)) {
7748 status = PTR_ERR(task);
7749 goto out;
7750 }
7751 status = nfs4_wait_for_completion_rpc_task(task);
7752 if (status == 0)
7753 status = task->tk_status;
7754 rpc_put_task(task);
7755 return 0;
7756out:
7757 dprintk("<-- %s status=%d\n", __func__, status);
7758 return status;
7759}
7760
7761static void
7762nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7763{
7764 struct nfs4_layoutget *lgp = calldata;
7765 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7766 struct nfs4_session *session = nfs4_get_session(server);
7767
7768 dprintk("--> %s\n", __func__);
7769 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7770 * right now covering the LAYOUTGET we are about to send.
7771 * However, that is not so catastrophic, and there seems
7772 * to be no way to prevent it completely.
7773 */
7774 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7775 &lgp->res.seq_res, task))
7776 return;
7777 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7778 NFS_I(lgp->args.inode)->layout,
7779 &lgp->args.range,
7780 lgp->args.ctx->state)) {
7781 rpc_exit(task, NFS4_OK);
7782 }
7783}
7784
7785static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7786{
7787 struct nfs4_layoutget *lgp = calldata;
7788 struct inode *inode = lgp->args.inode;
7789 struct nfs_server *server = NFS_SERVER(inode);
7790 struct pnfs_layout_hdr *lo;
7791 struct nfs4_state *state = NULL;
7792 unsigned long timeo, now, giveup;
7793
7794 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7795
7796 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7797 goto out;
7798
7799 switch (task->tk_status) {
7800 case 0:
7801 goto out;
7802 /*
7803 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7804 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7805 */
7806 case -NFS4ERR_BADLAYOUT:
7807 goto out_overflow;
7808 /*
7809 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7810 * (or clients) writing to the same RAID stripe except when
7811 * the minlength argument is 0 (see RFC5661 section 18.43.3).
7812 */
7813 case -NFS4ERR_LAYOUTTRYLATER:
7814 if (lgp->args.minlength == 0)
7815 goto out_overflow;
7816 /*
7817 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7818 * existing layout before getting a new one).
7819 */
7820 case -NFS4ERR_RECALLCONFLICT:
7821 timeo = rpc_get_timeout(task->tk_client);
7822 giveup = lgp->args.timestamp + timeo;
7823 now = jiffies;
7824 if (time_after(giveup, now)) {
7825 unsigned long delay;
7826
7827 /* Delay for:
7828 * - Not less then NFS4_POLL_RETRY_MIN.
7829 * - One last time a jiffie before we give up
7830 * - exponential backoff (time_now minus start_attempt)
7831 */
7832 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7833 min((giveup - now - 1),
7834 now - lgp->args.timestamp));
7835
7836 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7837 __func__, delay);
7838 rpc_delay(task, delay);
7839 /* Do not call nfs4_async_handle_error() */
7840 goto out_restart;
7841 }
7842 break;
7843 case -NFS4ERR_EXPIRED:
7844 case -NFS4ERR_BAD_STATEID:
7845 spin_lock(&inode->i_lock);
7846 if (nfs4_stateid_match(&lgp->args.stateid,
7847 &lgp->args.ctx->state->stateid)) {
7848 spin_unlock(&inode->i_lock);
7849 /* If the open stateid was bad, then recover it. */
7850 state = lgp->args.ctx->state;
7851 break;
7852 }
7853 lo = NFS_I(inode)->layout;
7854 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7855 &lo->plh_stateid)) {
7856 LIST_HEAD(head);
7857
7858 /*
7859 * Mark the bad layout state as invalid, then retry
7860 * with the current stateid.
7861 */
7862 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
7863 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7864 spin_unlock(&inode->i_lock);
7865 pnfs_free_lseg_list(&head);
7866 } else
7867 spin_unlock(&inode->i_lock);
7868 goto out_restart;
7869 }
7870 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7871 goto out_restart;
7872out:
7873 dprintk("<-- %s\n", __func__);
7874 return;
7875out_restart:
7876 task->tk_status = 0;
7877 rpc_restart_call_prepare(task);
7878 return;
7879out_overflow:
7880 task->tk_status = -EOVERFLOW;
7881 goto out;
7882}
7883
7884static size_t max_response_pages(struct nfs_server *server)
7885{
7886 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7887 return nfs_page_array_len(0, max_resp_sz);
7888}
7889
7890static void nfs4_free_pages(struct page **pages, size_t size)
7891{
7892 int i;
7893
7894 if (!pages)
7895 return;
7896
7897 for (i = 0; i < size; i++) {
7898 if (!pages[i])
7899 break;
7900 __free_page(pages[i]);
7901 }
7902 kfree(pages);
7903}
7904
7905static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7906{
7907 struct page **pages;
7908 int i;
7909
7910 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7911 if (!pages) {
7912 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7913 return NULL;
7914 }
7915
7916 for (i = 0; i < size; i++) {
7917 pages[i] = alloc_page(gfp_flags);
7918 if (!pages[i]) {
7919 dprintk("%s: failed to allocate page\n", __func__);
7920 nfs4_free_pages(pages, size);
7921 return NULL;
7922 }
7923 }
7924
7925 return pages;
7926}
7927
7928static void nfs4_layoutget_release(void *calldata)
7929{
7930 struct nfs4_layoutget *lgp = calldata;
7931 struct inode *inode = lgp->args.inode;
7932 struct nfs_server *server = NFS_SERVER(inode);
7933 size_t max_pages = max_response_pages(server);
7934
7935 dprintk("--> %s\n", __func__);
7936 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7937 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7938 put_nfs_open_context(lgp->args.ctx);
7939 kfree(calldata);
7940 dprintk("<-- %s\n", __func__);
7941}
7942
7943static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7944 .rpc_call_prepare = nfs4_layoutget_prepare,
7945 .rpc_call_done = nfs4_layoutget_done,
7946 .rpc_release = nfs4_layoutget_release,
7947};
7948
7949struct pnfs_layout_segment *
7950nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7951{
7952 struct inode *inode = lgp->args.inode;
7953 struct nfs_server *server = NFS_SERVER(inode);
7954 size_t max_pages = max_response_pages(server);
7955 struct rpc_task *task;
7956 struct rpc_message msg = {
7957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7958 .rpc_argp = &lgp->args,
7959 .rpc_resp = &lgp->res,
7960 .rpc_cred = lgp->cred,
7961 };
7962 struct rpc_task_setup task_setup_data = {
7963 .rpc_client = server->client,
7964 .rpc_message = &msg,
7965 .callback_ops = &nfs4_layoutget_call_ops,
7966 .callback_data = lgp,
7967 .flags = RPC_TASK_ASYNC,
7968 };
7969 struct pnfs_layout_segment *lseg = NULL;
7970 int status = 0;
7971
7972 dprintk("--> %s\n", __func__);
7973
7974 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7975 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7976
7977 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7978 if (!lgp->args.layout.pages) {
7979 nfs4_layoutget_release(lgp);
7980 return ERR_PTR(-ENOMEM);
7981 }
7982 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7983 lgp->args.timestamp = jiffies;
7984
7985 lgp->res.layoutp = &lgp->args.layout;
7986 lgp->res.seq_res.sr_slot = NULL;
7987 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7988
7989 task = rpc_run_task(&task_setup_data);
7990 if (IS_ERR(task))
7991 return ERR_CAST(task);
7992 status = nfs4_wait_for_completion_rpc_task(task);
7993 if (status == 0)
7994 status = task->tk_status;
7995 trace_nfs4_layoutget(lgp->args.ctx,
7996 &lgp->args.range,
7997 &lgp->res.range,
7998 status);
7999 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8000 if (status == 0 && lgp->res.layoutp->len)
8001 lseg = pnfs_layout_process(lgp);
8002 rpc_put_task(task);
8003 dprintk("<-- %s status=%d\n", __func__, status);
8004 if (status)
8005 return ERR_PTR(status);
8006 return lseg;
8007}
8008
8009static void
8010nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8011{
8012 struct nfs4_layoutreturn *lrp = calldata;
8013
8014 dprintk("--> %s\n", __func__);
8015 nfs41_setup_sequence(lrp->clp->cl_session,
8016 &lrp->args.seq_args,
8017 &lrp->res.seq_res,
8018 task);
8019}
8020
8021static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8022{
8023 struct nfs4_layoutreturn *lrp = calldata;
8024 struct nfs_server *server;
8025
8026 dprintk("--> %s\n", __func__);
8027
8028 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
8029 return;
8030
8031 server = NFS_SERVER(lrp->args.inode);
8032 switch (task->tk_status) {
8033 default:
8034 task->tk_status = 0;
8035 case 0:
8036 break;
8037 case -NFS4ERR_DELAY:
8038 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8039 break;
8040 rpc_restart_call_prepare(task);
8041 return;
8042 }
8043 dprintk("<-- %s\n", __func__);
8044}
8045
8046static void nfs4_layoutreturn_release(void *calldata)
8047{
8048 struct nfs4_layoutreturn *lrp = calldata;
8049 struct pnfs_layout_hdr *lo = lrp->args.layout;
8050 LIST_HEAD(freeme);
8051
8052 dprintk("--> %s\n", __func__);
8053 spin_lock(&lo->plh_inode->i_lock);
8054 if (lrp->res.lrs_present)
8055 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
8056 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8057 pnfs_clear_layoutreturn_waitbit(lo);
8058 lo->plh_block_lgets--;
8059 spin_unlock(&lo->plh_inode->i_lock);
8060 pnfs_free_lseg_list(&freeme);
8061 pnfs_put_layout_hdr(lrp->args.layout);
8062 nfs_iput_and_deactive(lrp->inode);
8063 kfree(calldata);
8064 dprintk("<-- %s\n", __func__);
8065}
8066
8067static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8068 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8069 .rpc_call_done = nfs4_layoutreturn_done,
8070 .rpc_release = nfs4_layoutreturn_release,
8071};
8072
8073int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8074{
8075 struct rpc_task *task;
8076 struct rpc_message msg = {
8077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8078 .rpc_argp = &lrp->args,
8079 .rpc_resp = &lrp->res,
8080 .rpc_cred = lrp->cred,
8081 };
8082 struct rpc_task_setup task_setup_data = {
8083 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8084 .rpc_message = &msg,
8085 .callback_ops = &nfs4_layoutreturn_call_ops,
8086 .callback_data = lrp,
8087 };
8088 int status = 0;
8089
8090 dprintk("--> %s\n", __func__);
8091 if (!sync) {
8092 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8093 if (!lrp->inode) {
8094 nfs4_layoutreturn_release(lrp);
8095 return -EAGAIN;
8096 }
8097 task_setup_data.flags |= RPC_TASK_ASYNC;
8098 }
8099 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8100 task = rpc_run_task(&task_setup_data);
8101 if (IS_ERR(task))
8102 return PTR_ERR(task);
8103 if (sync)
8104 status = task->tk_status;
8105 trace_nfs4_layoutreturn(lrp->args.inode, status);
8106 dprintk("<-- %s status=%d\n", __func__, status);
8107 rpc_put_task(task);
8108 return status;
8109}
8110
8111static int
8112_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8113 struct pnfs_device *pdev,
8114 struct rpc_cred *cred)
8115{
8116 struct nfs4_getdeviceinfo_args args = {
8117 .pdev = pdev,
8118 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8119 NOTIFY_DEVICEID4_DELETE,
8120 };
8121 struct nfs4_getdeviceinfo_res res = {
8122 .pdev = pdev,
8123 };
8124 struct rpc_message msg = {
8125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8126 .rpc_argp = &args,
8127 .rpc_resp = &res,
8128 .rpc_cred = cred,
8129 };
8130 int status;
8131
8132 dprintk("--> %s\n", __func__);
8133 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8134 if (res.notification & ~args.notify_types)
8135 dprintk("%s: unsupported notification\n", __func__);
8136 if (res.notification != args.notify_types)
8137 pdev->nocache = 1;
8138
8139 dprintk("<-- %s status=%d\n", __func__, status);
8140
8141 return status;
8142}
8143
8144int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8145 struct pnfs_device *pdev,
8146 struct rpc_cred *cred)
8147{
8148 struct nfs4_exception exception = { };
8149 int err;
8150
8151 do {
8152 err = nfs4_handle_exception(server,
8153 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8154 &exception);
8155 } while (exception.retry);
8156 return err;
8157}
8158EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8159
8160static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8161{
8162 struct nfs4_layoutcommit_data *data = calldata;
8163 struct nfs_server *server = NFS_SERVER(data->args.inode);
8164 struct nfs4_session *session = nfs4_get_session(server);
8165
8166 nfs41_setup_sequence(session,
8167 &data->args.seq_args,
8168 &data->res.seq_res,
8169 task);
8170}
8171
8172static void
8173nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8174{
8175 struct nfs4_layoutcommit_data *data = calldata;
8176 struct nfs_server *server = NFS_SERVER(data->args.inode);
8177
8178 if (!nfs41_sequence_done(task, &data->res.seq_res))
8179 return;
8180
8181 switch (task->tk_status) { /* Just ignore these failures */
8182 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8183 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8184 case -NFS4ERR_BADLAYOUT: /* no layout */
8185 case -NFS4ERR_GRACE: /* loca_recalim always false */
8186 task->tk_status = 0;
8187 case 0:
8188 break;
8189 default:
8190 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8191 rpc_restart_call_prepare(task);
8192 return;
8193 }
8194 }
8195}
8196
8197static void nfs4_layoutcommit_release(void *calldata)
8198{
8199 struct nfs4_layoutcommit_data *data = calldata;
8200
8201 pnfs_cleanup_layoutcommit(data);
8202 nfs_post_op_update_inode_force_wcc(data->args.inode,
8203 data->res.fattr);
8204 put_rpccred(data->cred);
8205 nfs_iput_and_deactive(data->inode);
8206 kfree(data);
8207}
8208
8209static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8210 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8211 .rpc_call_done = nfs4_layoutcommit_done,
8212 .rpc_release = nfs4_layoutcommit_release,
8213};
8214
8215int
8216nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8217{
8218 struct rpc_message msg = {
8219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8220 .rpc_argp = &data->args,
8221 .rpc_resp = &data->res,
8222 .rpc_cred = data->cred,
8223 };
8224 struct rpc_task_setup task_setup_data = {
8225 .task = &data->task,
8226 .rpc_client = NFS_CLIENT(data->args.inode),
8227 .rpc_message = &msg,
8228 .callback_ops = &nfs4_layoutcommit_ops,
8229 .callback_data = data,
8230 };
8231 struct rpc_task *task;
8232 int status = 0;
8233
8234 dprintk("NFS: initiating layoutcommit call. sync %d "
8235 "lbw: %llu inode %lu\n", sync,
8236 data->args.lastbytewritten,
8237 data->args.inode->i_ino);
8238
8239 if (!sync) {
8240 data->inode = nfs_igrab_and_active(data->args.inode);
8241 if (data->inode == NULL) {
8242 nfs4_layoutcommit_release(data);
8243 return -EAGAIN;
8244 }
8245 task_setup_data.flags = RPC_TASK_ASYNC;
8246 }
8247 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8248 task = rpc_run_task(&task_setup_data);
8249 if (IS_ERR(task))
8250 return PTR_ERR(task);
8251 if (sync)
8252 status = task->tk_status;
8253 trace_nfs4_layoutcommit(data->args.inode, status);
8254 dprintk("%s: status %d\n", __func__, status);
8255 rpc_put_task(task);
8256 return status;
8257}
8258
8259/**
8260 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8261 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8262 */
8263static int
8264_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8265 struct nfs_fsinfo *info,
8266 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8267{
8268 struct nfs41_secinfo_no_name_args args = {
8269 .style = SECINFO_STYLE_CURRENT_FH,
8270 };
8271 struct nfs4_secinfo_res res = {
8272 .flavors = flavors,
8273 };
8274 struct rpc_message msg = {
8275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8276 .rpc_argp = &args,
8277 .rpc_resp = &res,
8278 };
8279 struct rpc_clnt *clnt = server->client;
8280 struct rpc_cred *cred = NULL;
8281 int status;
8282
8283 if (use_integrity) {
8284 clnt = server->nfs_client->cl_rpcclient;
8285 cred = nfs4_get_clid_cred(server->nfs_client);
8286 msg.rpc_cred = cred;
8287 }
8288
8289 dprintk("--> %s\n", __func__);
8290 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8291 &res.seq_res, 0);
8292 dprintk("<-- %s status=%d\n", __func__, status);
8293
8294 if (cred)
8295 put_rpccred(cred);
8296
8297 return status;
8298}
8299
8300static int
8301nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8302 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8303{
8304 struct nfs4_exception exception = { };
8305 int err;
8306 do {
8307 /* first try using integrity protection */
8308 err = -NFS4ERR_WRONGSEC;
8309
8310 /* try to use integrity protection with machine cred */
8311 if (_nfs4_is_integrity_protected(server->nfs_client))
8312 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8313 flavors, true);
8314
8315 /*
8316 * if unable to use integrity protection, or SECINFO with
8317 * integrity protection returns NFS4ERR_WRONGSEC (which is
8318 * disallowed by spec, but exists in deployed servers) use
8319 * the current filesystem's rpc_client and the user cred.
8320 */
8321 if (err == -NFS4ERR_WRONGSEC)
8322 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8323 flavors, false);
8324
8325 switch (err) {
8326 case 0:
8327 case -NFS4ERR_WRONGSEC:
8328 case -ENOTSUPP:
8329 goto out;
8330 default:
8331 err = nfs4_handle_exception(server, err, &exception);
8332 }
8333 } while (exception.retry);
8334out:
8335 return err;
8336}
8337
8338static int
8339nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8340 struct nfs_fsinfo *info)
8341{
8342 int err;
8343 struct page *page;
8344 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8345 struct nfs4_secinfo_flavors *flavors;
8346 struct nfs4_secinfo4 *secinfo;
8347 int i;
8348
8349 page = alloc_page(GFP_KERNEL);
8350 if (!page) {
8351 err = -ENOMEM;
8352 goto out;
8353 }
8354
8355 flavors = page_address(page);
8356 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8357
8358 /*
8359 * Fall back on "guess and check" method if
8360 * the server doesn't support SECINFO_NO_NAME
8361 */
8362 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8363 err = nfs4_find_root_sec(server, fhandle, info);
8364 goto out_freepage;
8365 }
8366 if (err)
8367 goto out_freepage;
8368
8369 for (i = 0; i < flavors->num_flavors; i++) {
8370 secinfo = &flavors->flavors[i];
8371
8372 switch (secinfo->flavor) {
8373 case RPC_AUTH_NULL:
8374 case RPC_AUTH_UNIX:
8375 case RPC_AUTH_GSS:
8376 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8377 &secinfo->flavor_info);
8378 break;
8379 default:
8380 flavor = RPC_AUTH_MAXFLAVOR;
8381 break;
8382 }
8383
8384 if (!nfs_auth_info_match(&server->auth_info, flavor))
8385 flavor = RPC_AUTH_MAXFLAVOR;
8386
8387 if (flavor != RPC_AUTH_MAXFLAVOR) {
8388 err = nfs4_lookup_root_sec(server, fhandle,
8389 info, flavor);
8390 if (!err)
8391 break;
8392 }
8393 }
8394
8395 if (flavor == RPC_AUTH_MAXFLAVOR)
8396 err = -EPERM;
8397
8398out_freepage:
8399 put_page(page);
8400 if (err == -EACCES)
8401 return -EPERM;
8402out:
8403 return err;
8404}
8405
8406static int _nfs41_test_stateid(struct nfs_server *server,
8407 nfs4_stateid *stateid,
8408 struct rpc_cred *cred)
8409{
8410 int status;
8411 struct nfs41_test_stateid_args args = {
8412 .stateid = stateid,
8413 };
8414 struct nfs41_test_stateid_res res;
8415 struct rpc_message msg = {
8416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8417 .rpc_argp = &args,
8418 .rpc_resp = &res,
8419 .rpc_cred = cred,
8420 };
8421 struct rpc_clnt *rpc_client = server->client;
8422
8423 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8424 &rpc_client, &msg);
8425
8426 dprintk("NFS call test_stateid %p\n", stateid);
8427 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8428 nfs4_set_sequence_privileged(&args.seq_args);
8429 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8430 &args.seq_args, &res.seq_res);
8431 if (status != NFS_OK) {
8432 dprintk("NFS reply test_stateid: failed, %d\n", status);
8433 return status;
8434 }
8435 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8436 return -res.status;
8437}
8438
8439/**
8440 * nfs41_test_stateid - perform a TEST_STATEID operation
8441 *
8442 * @server: server / transport on which to perform the operation
8443 * @stateid: state ID to test
8444 * @cred: credential
8445 *
8446 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8447 * Otherwise a negative NFS4ERR value is returned if the operation
8448 * failed or the state ID is not currently valid.
8449 */
8450static int nfs41_test_stateid(struct nfs_server *server,
8451 nfs4_stateid *stateid,
8452 struct rpc_cred *cred)
8453{
8454 struct nfs4_exception exception = { };
8455 int err;
8456 do {
8457 err = _nfs41_test_stateid(server, stateid, cred);
8458 if (err != -NFS4ERR_DELAY)
8459 break;
8460 nfs4_handle_exception(server, err, &exception);
8461 } while (exception.retry);
8462 return err;
8463}
8464
8465struct nfs_free_stateid_data {
8466 struct nfs_server *server;
8467 struct nfs41_free_stateid_args args;
8468 struct nfs41_free_stateid_res res;
8469};
8470
8471static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8472{
8473 struct nfs_free_stateid_data *data = calldata;
8474 nfs41_setup_sequence(nfs4_get_session(data->server),
8475 &data->args.seq_args,
8476 &data->res.seq_res,
8477 task);
8478}
8479
8480static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8481{
8482 struct nfs_free_stateid_data *data = calldata;
8483
8484 nfs41_sequence_done(task, &data->res.seq_res);
8485
8486 switch (task->tk_status) {
8487 case -NFS4ERR_DELAY:
8488 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8489 rpc_restart_call_prepare(task);
8490 }
8491}
8492
8493static void nfs41_free_stateid_release(void *calldata)
8494{
8495 kfree(calldata);
8496}
8497
8498static const struct rpc_call_ops nfs41_free_stateid_ops = {
8499 .rpc_call_prepare = nfs41_free_stateid_prepare,
8500 .rpc_call_done = nfs41_free_stateid_done,
8501 .rpc_release = nfs41_free_stateid_release,
8502};
8503
8504static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8505 nfs4_stateid *stateid,
8506 struct rpc_cred *cred,
8507 bool privileged)
8508{
8509 struct rpc_message msg = {
8510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8511 .rpc_cred = cred,
8512 };
8513 struct rpc_task_setup task_setup = {
8514 .rpc_client = server->client,
8515 .rpc_message = &msg,
8516 .callback_ops = &nfs41_free_stateid_ops,
8517 .flags = RPC_TASK_ASYNC,
8518 };
8519 struct nfs_free_stateid_data *data;
8520
8521 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8522 &task_setup.rpc_client, &msg);
8523
8524 dprintk("NFS call free_stateid %p\n", stateid);
8525 data = kmalloc(sizeof(*data), GFP_NOFS);
8526 if (!data)
8527 return ERR_PTR(-ENOMEM);
8528 data->server = server;
8529 nfs4_stateid_copy(&data->args.stateid, stateid);
8530
8531 task_setup.callback_data = data;
8532
8533 msg.rpc_argp = &data->args;
8534 msg.rpc_resp = &data->res;
8535 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8536 if (privileged)
8537 nfs4_set_sequence_privileged(&data->args.seq_args);
8538
8539 return rpc_run_task(&task_setup);
8540}
8541
8542/**
8543 * nfs41_free_stateid - perform a FREE_STATEID operation
8544 *
8545 * @server: server / transport on which to perform the operation
8546 * @stateid: state ID to release
8547 * @cred: credential
8548 *
8549 * Returns NFS_OK if the server freed "stateid". Otherwise a
8550 * negative NFS4ERR value is returned.
8551 */
8552static int nfs41_free_stateid(struct nfs_server *server,
8553 nfs4_stateid *stateid,
8554 struct rpc_cred *cred)
8555{
8556 struct rpc_task *task;
8557 int ret;
8558
8559 task = _nfs41_free_stateid(server, stateid, cred, true);
8560 if (IS_ERR(task))
8561 return PTR_ERR(task);
8562 ret = rpc_wait_for_completion_task(task);
8563 if (!ret)
8564 ret = task->tk_status;
8565 rpc_put_task(task);
8566 return ret;
8567}
8568
8569static void
8570nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8571{
8572 struct rpc_task *task;
8573 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8574
8575 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8576 nfs4_free_lock_state(server, lsp);
8577 if (IS_ERR(task))
8578 return;
8579 rpc_put_task(task);
8580}
8581
8582static bool nfs41_match_stateid(const nfs4_stateid *s1,
8583 const nfs4_stateid *s2)
8584{
8585 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8586 return false;
8587
8588 if (s1->seqid == s2->seqid)
8589 return true;
8590 if (s1->seqid == 0 || s2->seqid == 0)
8591 return true;
8592
8593 return false;
8594}
8595
8596#endif /* CONFIG_NFS_V4_1 */
8597
8598static bool nfs4_match_stateid(const nfs4_stateid *s1,
8599 const nfs4_stateid *s2)
8600{
8601 return nfs4_stateid_match(s1, s2);
8602}
8603
8604
8605static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8606 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8607 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8608 .recover_open = nfs4_open_reclaim,
8609 .recover_lock = nfs4_lock_reclaim,
8610 .establish_clid = nfs4_init_clientid,
8611 .detect_trunking = nfs40_discover_server_trunking,
8612};
8613
8614#if defined(CONFIG_NFS_V4_1)
8615static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8616 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8617 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8618 .recover_open = nfs4_open_reclaim,
8619 .recover_lock = nfs4_lock_reclaim,
8620 .establish_clid = nfs41_init_clientid,
8621 .reclaim_complete = nfs41_proc_reclaim_complete,
8622 .detect_trunking = nfs41_discover_server_trunking,
8623};
8624#endif /* CONFIG_NFS_V4_1 */
8625
8626static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8627 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8628 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8629 .recover_open = nfs40_open_expired,
8630 .recover_lock = nfs4_lock_expired,
8631 .establish_clid = nfs4_init_clientid,
8632};
8633
8634#if defined(CONFIG_NFS_V4_1)
8635static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8636 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8637 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8638 .recover_open = nfs41_open_expired,
8639 .recover_lock = nfs41_lock_expired,
8640 .establish_clid = nfs41_init_clientid,
8641};
8642#endif /* CONFIG_NFS_V4_1 */
8643
8644static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8645 .sched_state_renewal = nfs4_proc_async_renew,
8646 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8647 .renew_lease = nfs4_proc_renew,
8648};
8649
8650#if defined(CONFIG_NFS_V4_1)
8651static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8652 .sched_state_renewal = nfs41_proc_async_sequence,
8653 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8654 .renew_lease = nfs4_proc_sequence,
8655};
8656#endif
8657
8658static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8659 .get_locations = _nfs40_proc_get_locations,
8660 .fsid_present = _nfs40_proc_fsid_present,
8661};
8662
8663#if defined(CONFIG_NFS_V4_1)
8664static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8665 .get_locations = _nfs41_proc_get_locations,
8666 .fsid_present = _nfs41_proc_fsid_present,
8667};
8668#endif /* CONFIG_NFS_V4_1 */
8669
8670static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8671 .minor_version = 0,
8672 .init_caps = NFS_CAP_READDIRPLUS
8673 | NFS_CAP_ATOMIC_OPEN
8674 | NFS_CAP_POSIX_LOCK,
8675 .init_client = nfs40_init_client,
8676 .shutdown_client = nfs40_shutdown_client,
8677 .match_stateid = nfs4_match_stateid,
8678 .find_root_sec = nfs4_find_root_sec,
8679 .free_lock_state = nfs4_release_lockowner,
8680 .alloc_seqid = nfs_alloc_seqid,
8681 .call_sync_ops = &nfs40_call_sync_ops,
8682 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8683 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8684 .state_renewal_ops = &nfs40_state_renewal_ops,
8685 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8686};
8687
8688#if defined(CONFIG_NFS_V4_1)
8689static struct nfs_seqid *
8690nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8691{
8692 return NULL;
8693}
8694
8695static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8696 .minor_version = 1,
8697 .init_caps = NFS_CAP_READDIRPLUS
8698 | NFS_CAP_ATOMIC_OPEN
8699 | NFS_CAP_POSIX_LOCK
8700 | NFS_CAP_STATEID_NFSV41
8701 | NFS_CAP_ATOMIC_OPEN_V1,
8702 .init_client = nfs41_init_client,
8703 .shutdown_client = nfs41_shutdown_client,
8704 .match_stateid = nfs41_match_stateid,
8705 .find_root_sec = nfs41_find_root_sec,
8706 .free_lock_state = nfs41_free_lock_state,
8707 .alloc_seqid = nfs_alloc_no_seqid,
8708 .call_sync_ops = &nfs41_call_sync_ops,
8709 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8710 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8711 .state_renewal_ops = &nfs41_state_renewal_ops,
8712 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8713};
8714#endif
8715
8716#if defined(CONFIG_NFS_V4_2)
8717static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8718 .minor_version = 2,
8719 .init_caps = NFS_CAP_READDIRPLUS
8720 | NFS_CAP_ATOMIC_OPEN
8721 | NFS_CAP_POSIX_LOCK
8722 | NFS_CAP_STATEID_NFSV41
8723 | NFS_CAP_ATOMIC_OPEN_V1
8724 | NFS_CAP_ALLOCATE
8725 | NFS_CAP_DEALLOCATE
8726 | NFS_CAP_SEEK
8727 | NFS_CAP_LAYOUTSTATS,
8728 .init_client = nfs41_init_client,
8729 .shutdown_client = nfs41_shutdown_client,
8730 .match_stateid = nfs41_match_stateid,
8731 .find_root_sec = nfs41_find_root_sec,
8732 .free_lock_state = nfs41_free_lock_state,
8733 .call_sync_ops = &nfs41_call_sync_ops,
8734 .alloc_seqid = nfs_alloc_no_seqid,
8735 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8736 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8737 .state_renewal_ops = &nfs41_state_renewal_ops,
8738 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8739};
8740#endif
8741
8742const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8743 [0] = &nfs_v4_0_minor_ops,
8744#if defined(CONFIG_NFS_V4_1)
8745 [1] = &nfs_v4_1_minor_ops,
8746#endif
8747#if defined(CONFIG_NFS_V4_2)
8748 [2] = &nfs_v4_2_minor_ops,
8749#endif
8750};
8751
8752static const struct inode_operations nfs4_dir_inode_operations = {
8753 .create = nfs_create,
8754 .lookup = nfs_lookup,
8755 .atomic_open = nfs_atomic_open,
8756 .link = nfs_link,
8757 .unlink = nfs_unlink,
8758 .symlink = nfs_symlink,
8759 .mkdir = nfs_mkdir,
8760 .rmdir = nfs_rmdir,
8761 .mknod = nfs_mknod,
8762 .rename = nfs_rename,
8763 .permission = nfs_permission,
8764 .getattr = nfs_getattr,
8765 .setattr = nfs_setattr,
8766 .getxattr = generic_getxattr,
8767 .setxattr = generic_setxattr,
8768 .listxattr = generic_listxattr,
8769 .removexattr = generic_removexattr,
8770};
8771
8772static const struct inode_operations nfs4_file_inode_operations = {
8773 .permission = nfs_permission,
8774 .getattr = nfs_getattr,
8775 .setattr = nfs_setattr,
8776 .getxattr = generic_getxattr,
8777 .setxattr = generic_setxattr,
8778 .listxattr = generic_listxattr,
8779 .removexattr = generic_removexattr,
8780};
8781
8782const struct nfs_rpc_ops nfs_v4_clientops = {
8783 .version = 4, /* protocol version */
8784 .dentry_ops = &nfs4_dentry_operations,
8785 .dir_inode_ops = &nfs4_dir_inode_operations,
8786 .file_inode_ops = &nfs4_file_inode_operations,
8787 .file_ops = &nfs4_file_operations,
8788 .getroot = nfs4_proc_get_root,
8789 .submount = nfs4_submount,
8790 .try_mount = nfs4_try_mount,
8791 .getattr = nfs4_proc_getattr,
8792 .setattr = nfs4_proc_setattr,
8793 .lookup = nfs4_proc_lookup,
8794 .access = nfs4_proc_access,
8795 .readlink = nfs4_proc_readlink,
8796 .create = nfs4_proc_create,
8797 .remove = nfs4_proc_remove,
8798 .unlink_setup = nfs4_proc_unlink_setup,
8799 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8800 .unlink_done = nfs4_proc_unlink_done,
8801 .rename_setup = nfs4_proc_rename_setup,
8802 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8803 .rename_done = nfs4_proc_rename_done,
8804 .link = nfs4_proc_link,
8805 .symlink = nfs4_proc_symlink,
8806 .mkdir = nfs4_proc_mkdir,
8807 .rmdir = nfs4_proc_remove,
8808 .readdir = nfs4_proc_readdir,
8809 .mknod = nfs4_proc_mknod,
8810 .statfs = nfs4_proc_statfs,
8811 .fsinfo = nfs4_proc_fsinfo,
8812 .pathconf = nfs4_proc_pathconf,
8813 .set_capabilities = nfs4_server_capabilities,
8814 .decode_dirent = nfs4_decode_dirent,
8815 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8816 .read_setup = nfs4_proc_read_setup,
8817 .read_done = nfs4_read_done,
8818 .write_setup = nfs4_proc_write_setup,
8819 .write_done = nfs4_write_done,
8820 .commit_setup = nfs4_proc_commit_setup,
8821 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8822 .commit_done = nfs4_commit_done,
8823 .lock = nfs4_proc_lock,
8824 .clear_acl_cache = nfs4_zap_acl_attr,
8825 .close_context = nfs4_close_context,
8826 .open_context = nfs4_atomic_open,
8827 .have_delegation = nfs4_have_delegation,
8828 .return_delegation = nfs4_inode_return_delegation,
8829 .alloc_client = nfs4_alloc_client,
8830 .init_client = nfs4_init_client,
8831 .free_client = nfs4_free_client,
8832 .create_server = nfs4_create_server,
8833 .clone_server = nfs_clone_server,
8834};
8835
8836static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8837 .prefix = XATTR_NAME_NFSV4_ACL,
8838 .list = nfs4_xattr_list_nfs4_acl,
8839 .get = nfs4_xattr_get_nfs4_acl,
8840 .set = nfs4_xattr_set_nfs4_acl,
8841};
8842
8843const struct xattr_handler *nfs4_xattr_handlers[] = {
8844 &nfs4_xattr_nfs4_acl_handler,
8845#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8846 &nfs4_xattr_nfs4_label_handler,
8847#endif
8848 NULL
8849};
8850
8851/*
8852 * Local variables:
8853 * c-basic-offset: 8
8854 * End:
8855 */
Linux 6.x block layer and io_uring tree(s)