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SUNRPC: Make NFS swap work with multipath
[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 void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88#ifdef CONFIG_NFS_V4_1
89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
93#endif
94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
141/* Prevent leaks of NFSv4 errors into userland */
142static int nfs4_map_errors(int err)
143{
144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
150 return -EREMOTEIO;
151 case -NFS4ERR_WRONGSEC:
152 case -NFS4ERR_WRONG_CRED:
153 return -EPERM;
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
163 default:
164 dprintk("%s could not handle NFSv4 error %d\n",
165 __func__, -err);
166 break;
167 }
168 return -EIO;
169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
174const u32 nfs4_fattr_bitmap[3] = {
175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
190#ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
192#endif
193};
194
195static const u32 nfs4_pnfs_open_bitmap[3] = {
196 FATTR4_WORD0_TYPE
197 | FATTR4_WORD0_CHANGE
198 | FATTR4_WORD0_SIZE
199 | FATTR4_WORD0_FSID
200 | FATTR4_WORD0_FILEID,
201 FATTR4_WORD1_MODE
202 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
211#ifdef CONFIG_NFS_V4_SECURITY_LABEL
212 | FATTR4_WORD2_SECURITY_LABEL
213#endif
214};
215
216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
222const u32 nfs4_statfs_bitmap[3] = {
223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
231const u32 nfs4_pathconf_bitmap[3] = {
232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
241 FATTR4_WORD1_TIME_DELTA
242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
244 | FATTR4_WORD2_CLONE_BLKSIZE
245};
246
247const u32 nfs4_fs_locations_bitmap[3] = {
248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
264};
265
266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
267 struct nfs4_readdir_arg *readdir)
268{
269 __be32 *start, *p;
270
271 if (cookie > 2) {
272 readdir->cookie = cookie;
273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
289 start = p = kmap_atomic(*readdir->pages);
290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
301 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
313 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
317 kunmap_atomic(start);
318}
319
320static long nfs4_update_delay(long *timeout)
321{
322 long ret;
323 if (!timeout)
324 return NFS4_POLL_RETRY_MAX;
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
329 ret = *timeout;
330 *timeout <<= 1;
331 return ret;
332}
333
334static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
335{
336 int res = 0;
337
338 might_sleep();
339
340 freezable_schedule_timeout_killable_unsafe(
341 nfs4_update_delay(timeout));
342 if (fatal_signal_pending(current))
343 res = -ERESTARTSYS;
344 return res;
345}
346
347/* This is the error handling routine for processes that are allowed
348 * to sleep.
349 */
350static int nfs4_do_handle_exception(struct nfs_server *server,
351 int errorcode, struct nfs4_exception *exception)
352{
353 struct nfs_client *clp = server->nfs_client;
354 struct nfs4_state *state = exception->state;
355 struct inode *inode = exception->inode;
356 int ret = errorcode;
357
358 exception->delay = 0;
359 exception->recovering = 0;
360 exception->retry = 0;
361 switch(errorcode) {
362 case 0:
363 return 0;
364 case -NFS4ERR_OPENMODE:
365 case -NFS4ERR_DELEG_REVOKED:
366 case -NFS4ERR_ADMIN_REVOKED:
367 case -NFS4ERR_BAD_STATEID:
368 if (inode && nfs_async_inode_return_delegation(inode,
369 NULL) == 0)
370 goto wait_on_recovery;
371 if (state == NULL)
372 break;
373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
376 goto wait_on_recovery;
377 case -NFS4ERR_EXPIRED:
378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
383 case -NFS4ERR_STALE_STATEID:
384 case -NFS4ERR_STALE_CLIENTID:
385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
395#if defined(CONFIG_NFS_V4_1)
396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
406 goto wait_on_recovery;
407#endif /* defined(CONFIG_NFS_V4_1) */
408 case -NFS4ERR_FILE_OPEN:
409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
416 case -NFS4ERR_DELAY:
417 nfs_inc_server_stats(server, NFSIOS_DELAY);
418 case -NFS4ERR_GRACE:
419 exception->delay = 1;
420 return 0;
421
422 case -NFS4ERR_RETRY_UNCACHED_REP:
423 case -NFS4ERR_OLD_STATEID:
424 exception->retry = 1;
425 break;
426 case -NFS4ERR_BADOWNER:
427 /* The following works around a Linux server bug! */
428 case -NFS4ERR_BADNAME:
429 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
430 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
431 exception->retry = 1;
432 printk(KERN_WARNING "NFS: v4 server %s "
433 "does not accept raw "
434 "uid/gids. "
435 "Reenabling the idmapper.\n",
436 server->nfs_client->cl_hostname);
437 }
438 }
439 /* We failed to handle the error */
440 return nfs4_map_errors(ret);
441wait_on_recovery:
442 exception->recovering = 1;
443 return 0;
444}
445
446/* This is the error handling routine for processes that are allowed
447 * to sleep.
448 */
449int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
450{
451 struct nfs_client *clp = server->nfs_client;
452 int ret;
453
454 ret = nfs4_do_handle_exception(server, errorcode, exception);
455 if (exception->delay) {
456 ret = nfs4_delay(server->client, &exception->timeout);
457 goto out_retry;
458 }
459 if (exception->recovering) {
460 ret = nfs4_wait_clnt_recover(clp);
461 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
462 return -EIO;
463 goto out_retry;
464 }
465 return ret;
466out_retry:
467 if (ret == 0)
468 exception->retry = 1;
469 return ret;
470}
471
472static int
473nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
474 int errorcode, struct nfs4_exception *exception)
475{
476 struct nfs_client *clp = server->nfs_client;
477 int ret;
478
479 ret = nfs4_do_handle_exception(server, errorcode, exception);
480 if (exception->delay) {
481 rpc_delay(task, nfs4_update_delay(&exception->timeout));
482 goto out_retry;
483 }
484 if (exception->recovering) {
485 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
486 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
487 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
488 goto out_retry;
489 }
490 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
491 ret = -EIO;
492 return ret;
493out_retry:
494 if (ret == 0)
495 exception->retry = 1;
496 return ret;
497}
498
499static int
500nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
501 struct nfs4_state *state, long *timeout)
502{
503 struct nfs4_exception exception = {
504 .state = state,
505 };
506
507 if (task->tk_status >= 0)
508 return 0;
509 if (timeout)
510 exception.timeout = *timeout;
511 task->tk_status = nfs4_async_handle_exception(task, server,
512 task->tk_status,
513 &exception);
514 if (exception.delay && timeout)
515 *timeout = exception.timeout;
516 if (exception.retry)
517 return -EAGAIN;
518 return 0;
519}
520
521/*
522 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
523 * or 'false' otherwise.
524 */
525static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
526{
527 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
528
529 if (flavor == RPC_AUTH_GSS_KRB5I ||
530 flavor == RPC_AUTH_GSS_KRB5P)
531 return true;
532
533 return false;
534}
535
536static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
537{
538 spin_lock(&clp->cl_lock);
539 if (time_before(clp->cl_last_renewal,timestamp))
540 clp->cl_last_renewal = timestamp;
541 spin_unlock(&clp->cl_lock);
542}
543
544static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
545{
546 struct nfs_client *clp = server->nfs_client;
547
548 if (!nfs4_has_session(clp))
549 do_renew_lease(clp, timestamp);
550}
551
552struct nfs4_call_sync_data {
553 const struct nfs_server *seq_server;
554 struct nfs4_sequence_args *seq_args;
555 struct nfs4_sequence_res *seq_res;
556};
557
558void nfs4_init_sequence(struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res, int cache_reply)
560{
561 args->sa_slot = NULL;
562 args->sa_cache_this = cache_reply;
563 args->sa_privileged = 0;
564
565 res->sr_slot = NULL;
566}
567
568static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
569{
570 args->sa_privileged = 1;
571}
572
573int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
574 struct nfs4_sequence_args *args,
575 struct nfs4_sequence_res *res,
576 struct rpc_task *task)
577{
578 struct nfs4_slot *slot;
579
580 /* slot already allocated? */
581 if (res->sr_slot != NULL)
582 goto out_start;
583
584 spin_lock(&tbl->slot_tbl_lock);
585 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
586 goto out_sleep;
587
588 slot = nfs4_alloc_slot(tbl);
589 if (IS_ERR(slot)) {
590 if (slot == ERR_PTR(-ENOMEM))
591 task->tk_timeout = HZ >> 2;
592 goto out_sleep;
593 }
594 spin_unlock(&tbl->slot_tbl_lock);
595
596 args->sa_slot = slot;
597 res->sr_slot = slot;
598
599out_start:
600 rpc_call_start(task);
601 return 0;
602
603out_sleep:
604 if (args->sa_privileged)
605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
607 else
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
609 spin_unlock(&tbl->slot_tbl_lock);
610 return -EAGAIN;
611}
612EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
613
614static int nfs40_sequence_done(struct rpc_task *task,
615 struct nfs4_sequence_res *res)
616{
617 struct nfs4_slot *slot = res->sr_slot;
618 struct nfs4_slot_table *tbl;
619
620 if (slot == NULL)
621 goto out;
622
623 tbl = slot->table;
624 spin_lock(&tbl->slot_tbl_lock);
625 if (!nfs41_wake_and_assign_slot(tbl, slot))
626 nfs4_free_slot(tbl, slot);
627 spin_unlock(&tbl->slot_tbl_lock);
628
629 res->sr_slot = NULL;
630out:
631 return 1;
632}
633
634#if defined(CONFIG_NFS_V4_1)
635
636static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
637{
638 struct nfs4_session *session;
639 struct nfs4_slot_table *tbl;
640 struct nfs4_slot *slot = res->sr_slot;
641 bool send_new_highest_used_slotid = false;
642
643 tbl = slot->table;
644 session = tbl->session;
645
646 spin_lock(&tbl->slot_tbl_lock);
647 /* Be nice to the server: try to ensure that the last transmitted
648 * value for highest_user_slotid <= target_highest_slotid
649 */
650 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
651 send_new_highest_used_slotid = true;
652
653 if (nfs41_wake_and_assign_slot(tbl, slot)) {
654 send_new_highest_used_slotid = false;
655 goto out_unlock;
656 }
657 nfs4_free_slot(tbl, slot);
658
659 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
660 send_new_highest_used_slotid = false;
661out_unlock:
662 spin_unlock(&tbl->slot_tbl_lock);
663 res->sr_slot = NULL;
664 if (send_new_highest_used_slotid)
665 nfs41_notify_server(session->clp);
666}
667
668int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
669{
670 struct nfs4_session *session;
671 struct nfs4_slot *slot = res->sr_slot;
672 struct nfs_client *clp;
673 bool interrupted = false;
674 int ret = 1;
675
676 if (slot == NULL)
677 goto out_noaction;
678 /* don't increment the sequence number if the task wasn't sent */
679 if (!RPC_WAS_SENT(task))
680 goto out;
681
682 session = slot->table->session;
683
684 if (slot->interrupted) {
685 slot->interrupted = 0;
686 interrupted = true;
687 }
688
689 trace_nfs4_sequence_done(session, res);
690 /* Check the SEQUENCE operation status */
691 switch (res->sr_status) {
692 case 0:
693 /* Update the slot's sequence and clientid lease timer */
694 ++slot->seq_nr;
695 clp = session->clp;
696 do_renew_lease(clp, res->sr_timestamp);
697 /* Check sequence flags */
698 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
699 nfs41_update_target_slotid(slot->table, slot, res);
700 break;
701 case 1:
702 /*
703 * sr_status remains 1 if an RPC level error occurred.
704 * The server may or may not have processed the sequence
705 * operation..
706 * Mark the slot as having hosted an interrupted RPC call.
707 */
708 slot->interrupted = 1;
709 goto out;
710 case -NFS4ERR_DELAY:
711 /* The server detected a resend of the RPC call and
712 * returned NFS4ERR_DELAY as per Section 2.10.6.2
713 * of RFC5661.
714 */
715 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
716 __func__,
717 slot->slot_nr,
718 slot->seq_nr);
719 goto out_retry;
720 case -NFS4ERR_BADSLOT:
721 /*
722 * The slot id we used was probably retired. Try again
723 * using a different slot id.
724 */
725 goto retry_nowait;
726 case -NFS4ERR_SEQ_MISORDERED:
727 /*
728 * Was the last operation on this sequence interrupted?
729 * If so, retry after bumping the sequence number.
730 */
731 if (interrupted) {
732 ++slot->seq_nr;
733 goto retry_nowait;
734 }
735 /*
736 * Could this slot have been previously retired?
737 * If so, then the server may be expecting seq_nr = 1!
738 */
739 if (slot->seq_nr != 1) {
740 slot->seq_nr = 1;
741 goto retry_nowait;
742 }
743 break;
744 case -NFS4ERR_SEQ_FALSE_RETRY:
745 ++slot->seq_nr;
746 goto retry_nowait;
747 default:
748 /* Just update the slot sequence no. */
749 ++slot->seq_nr;
750 }
751out:
752 /* The session may be reset by one of the error handlers. */
753 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
754 nfs41_sequence_free_slot(res);
755out_noaction:
756 return ret;
757retry_nowait:
758 if (rpc_restart_call_prepare(task)) {
759 task->tk_status = 0;
760 ret = 0;
761 }
762 goto out;
763out_retry:
764 if (!rpc_restart_call(task))
765 goto out;
766 rpc_delay(task, NFS4_POLL_RETRY_MAX);
767 return 0;
768}
769EXPORT_SYMBOL_GPL(nfs41_sequence_done);
770
771int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
772{
773 if (res->sr_slot == NULL)
774 return 1;
775 if (!res->sr_slot->table->session)
776 return nfs40_sequence_done(task, res);
777 return nfs41_sequence_done(task, res);
778}
779EXPORT_SYMBOL_GPL(nfs4_sequence_done);
780
781int nfs41_setup_sequence(struct nfs4_session *session,
782 struct nfs4_sequence_args *args,
783 struct nfs4_sequence_res *res,
784 struct rpc_task *task)
785{
786 struct nfs4_slot *slot;
787 struct nfs4_slot_table *tbl;
788
789 dprintk("--> %s\n", __func__);
790 /* slot already allocated? */
791 if (res->sr_slot != NULL)
792 goto out_success;
793
794 tbl = &session->fc_slot_table;
795
796 task->tk_timeout = 0;
797
798 spin_lock(&tbl->slot_tbl_lock);
799 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
800 !args->sa_privileged) {
801 /* The state manager will wait until the slot table is empty */
802 dprintk("%s session is draining\n", __func__);
803 goto out_sleep;
804 }
805
806 slot = nfs4_alloc_slot(tbl);
807 if (IS_ERR(slot)) {
808 /* If out of memory, try again in 1/4 second */
809 if (slot == ERR_PTR(-ENOMEM))
810 task->tk_timeout = HZ >> 2;
811 dprintk("<-- %s: no free slots\n", __func__);
812 goto out_sleep;
813 }
814 spin_unlock(&tbl->slot_tbl_lock);
815
816 args->sa_slot = slot;
817
818 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
819 slot->slot_nr, slot->seq_nr);
820
821 res->sr_slot = slot;
822 res->sr_timestamp = jiffies;
823 res->sr_status_flags = 0;
824 /*
825 * sr_status is only set in decode_sequence, and so will remain
826 * set to 1 if an rpc level failure occurs.
827 */
828 res->sr_status = 1;
829 trace_nfs4_setup_sequence(session, args);
830out_success:
831 rpc_call_start(task);
832 return 0;
833out_sleep:
834 /* Privileged tasks are queued with top priority */
835 if (args->sa_privileged)
836 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
837 NULL, RPC_PRIORITY_PRIVILEGED);
838 else
839 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
840 spin_unlock(&tbl->slot_tbl_lock);
841 return -EAGAIN;
842}
843EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
844
845static int nfs4_setup_sequence(const struct nfs_server *server,
846 struct nfs4_sequence_args *args,
847 struct nfs4_sequence_res *res,
848 struct rpc_task *task)
849{
850 struct nfs4_session *session = nfs4_get_session(server);
851 int ret = 0;
852
853 if (!session)
854 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
855 args, res, task);
856
857 dprintk("--> %s clp %p session %p sr_slot %u\n",
858 __func__, session->clp, session, res->sr_slot ?
859 res->sr_slot->slot_nr : NFS4_NO_SLOT);
860
861 ret = nfs41_setup_sequence(session, args, res, task);
862
863 dprintk("<-- %s status=%d\n", __func__, ret);
864 return ret;
865}
866
867static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
868{
869 struct nfs4_call_sync_data *data = calldata;
870 struct nfs4_session *session = nfs4_get_session(data->seq_server);
871
872 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
873
874 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
875}
876
877static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
878{
879 struct nfs4_call_sync_data *data = calldata;
880
881 nfs41_sequence_done(task, data->seq_res);
882}
883
884static const struct rpc_call_ops nfs41_call_sync_ops = {
885 .rpc_call_prepare = nfs41_call_sync_prepare,
886 .rpc_call_done = nfs41_call_sync_done,
887};
888
889#else /* !CONFIG_NFS_V4_1 */
890
891static int nfs4_setup_sequence(const struct nfs_server *server,
892 struct nfs4_sequence_args *args,
893 struct nfs4_sequence_res *res,
894 struct rpc_task *task)
895{
896 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
897 args, res, task);
898}
899
900int nfs4_sequence_done(struct rpc_task *task,
901 struct nfs4_sequence_res *res)
902{
903 return nfs40_sequence_done(task, res);
904}
905EXPORT_SYMBOL_GPL(nfs4_sequence_done);
906
907#endif /* !CONFIG_NFS_V4_1 */
908
909static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
910{
911 struct nfs4_call_sync_data *data = calldata;
912 nfs4_setup_sequence(data->seq_server,
913 data->seq_args, data->seq_res, task);
914}
915
916static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
917{
918 struct nfs4_call_sync_data *data = calldata;
919 nfs4_sequence_done(task, data->seq_res);
920}
921
922static const struct rpc_call_ops nfs40_call_sync_ops = {
923 .rpc_call_prepare = nfs40_call_sync_prepare,
924 .rpc_call_done = nfs40_call_sync_done,
925};
926
927static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
928 struct nfs_server *server,
929 struct rpc_message *msg,
930 struct nfs4_sequence_args *args,
931 struct nfs4_sequence_res *res)
932{
933 int ret;
934 struct rpc_task *task;
935 struct nfs_client *clp = server->nfs_client;
936 struct nfs4_call_sync_data data = {
937 .seq_server = server,
938 .seq_args = args,
939 .seq_res = res,
940 };
941 struct rpc_task_setup task_setup = {
942 .rpc_client = clnt,
943 .rpc_message = msg,
944 .callback_ops = clp->cl_mvops->call_sync_ops,
945 .callback_data = &data
946 };
947
948 task = rpc_run_task(&task_setup);
949 if (IS_ERR(task))
950 ret = PTR_ERR(task);
951 else {
952 ret = task->tk_status;
953 rpc_put_task(task);
954 }
955 return ret;
956}
957
958int nfs4_call_sync(struct rpc_clnt *clnt,
959 struct nfs_server *server,
960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res,
963 int cache_reply)
964{
965 nfs4_init_sequence(args, res, cache_reply);
966 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
967}
968
969static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
970{
971 struct nfs_inode *nfsi = NFS_I(dir);
972
973 spin_lock(&dir->i_lock);
974 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
975 if (!cinfo->atomic || cinfo->before != dir->i_version)
976 nfs_force_lookup_revalidate(dir);
977 dir->i_version = cinfo->after;
978 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
979 nfs_fscache_invalidate(dir);
980 spin_unlock(&dir->i_lock);
981}
982
983struct nfs4_opendata {
984 struct kref kref;
985 struct nfs_openargs o_arg;
986 struct nfs_openres o_res;
987 struct nfs_open_confirmargs c_arg;
988 struct nfs_open_confirmres c_res;
989 struct nfs4_string owner_name;
990 struct nfs4_string group_name;
991 struct nfs4_label *a_label;
992 struct nfs_fattr f_attr;
993 struct nfs4_label *f_label;
994 struct dentry *dir;
995 struct dentry *dentry;
996 struct nfs4_state_owner *owner;
997 struct nfs4_state *state;
998 struct iattr attrs;
999 unsigned long timestamp;
1000 unsigned int rpc_done : 1;
1001 unsigned int file_created : 1;
1002 unsigned int is_recover : 1;
1003 int rpc_status;
1004 int cancelled;
1005};
1006
1007static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1008 int err, struct nfs4_exception *exception)
1009{
1010 if (err != -EINVAL)
1011 return false;
1012 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1013 return false;
1014 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1015 exception->retry = 1;
1016 return true;
1017}
1018
1019static u32
1020nfs4_map_atomic_open_share(struct nfs_server *server,
1021 fmode_t fmode, int openflags)
1022{
1023 u32 res = 0;
1024
1025 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1026 case FMODE_READ:
1027 res = NFS4_SHARE_ACCESS_READ;
1028 break;
1029 case FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_WRITE;
1031 break;
1032 case FMODE_READ|FMODE_WRITE:
1033 res = NFS4_SHARE_ACCESS_BOTH;
1034 }
1035 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1036 goto out;
1037 /* Want no delegation if we're using O_DIRECT */
1038 if (openflags & O_DIRECT)
1039 res |= NFS4_SHARE_WANT_NO_DELEG;
1040out:
1041 return res;
1042}
1043
1044static enum open_claim_type4
1045nfs4_map_atomic_open_claim(struct nfs_server *server,
1046 enum open_claim_type4 claim)
1047{
1048 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1049 return claim;
1050 switch (claim) {
1051 default:
1052 return claim;
1053 case NFS4_OPEN_CLAIM_FH:
1054 return NFS4_OPEN_CLAIM_NULL;
1055 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1056 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1057 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1058 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1059 }
1060}
1061
1062static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1063{
1064 p->o_res.f_attr = &p->f_attr;
1065 p->o_res.f_label = p->f_label;
1066 p->o_res.seqid = p->o_arg.seqid;
1067 p->c_res.seqid = p->c_arg.seqid;
1068 p->o_res.server = p->o_arg.server;
1069 p->o_res.access_request = p->o_arg.access;
1070 nfs_fattr_init(&p->f_attr);
1071 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1072}
1073
1074static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1075 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1076 const struct iattr *attrs,
1077 struct nfs4_label *label,
1078 enum open_claim_type4 claim,
1079 gfp_t gfp_mask)
1080{
1081 struct dentry *parent = dget_parent(dentry);
1082 struct inode *dir = d_inode(parent);
1083 struct nfs_server *server = NFS_SERVER(dir);
1084 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1085 struct nfs4_opendata *p;
1086
1087 p = kzalloc(sizeof(*p), gfp_mask);
1088 if (p == NULL)
1089 goto err;
1090
1091 p->f_label = nfs4_label_alloc(server, gfp_mask);
1092 if (IS_ERR(p->f_label))
1093 goto err_free_p;
1094
1095 p->a_label = nfs4_label_alloc(server, gfp_mask);
1096 if (IS_ERR(p->a_label))
1097 goto err_free_f;
1098
1099 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1100 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1101 if (IS_ERR(p->o_arg.seqid))
1102 goto err_free_label;
1103 nfs_sb_active(dentry->d_sb);
1104 p->dentry = dget(dentry);
1105 p->dir = parent;
1106 p->owner = sp;
1107 atomic_inc(&sp->so_count);
1108 p->o_arg.open_flags = flags;
1109 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1110 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1111 fmode, flags);
1112 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1113 * will return permission denied for all bits until close */
1114 if (!(flags & O_EXCL)) {
1115 /* ask server to check for all possible rights as results
1116 * are cached */
1117 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1118 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1119 }
1120 p->o_arg.clientid = server->nfs_client->cl_clientid;
1121 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1122 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1123 p->o_arg.name = &dentry->d_name;
1124 p->o_arg.server = server;
1125 p->o_arg.bitmask = nfs4_bitmask(server, label);
1126 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1127 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1128 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1129 switch (p->o_arg.claim) {
1130 case NFS4_OPEN_CLAIM_NULL:
1131 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1132 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1133 p->o_arg.fh = NFS_FH(dir);
1134 break;
1135 case NFS4_OPEN_CLAIM_PREVIOUS:
1136 case NFS4_OPEN_CLAIM_FH:
1137 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1138 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1139 p->o_arg.fh = NFS_FH(d_inode(dentry));
1140 }
1141 if (attrs != NULL && attrs->ia_valid != 0) {
1142 __u32 verf[2];
1143
1144 p->o_arg.u.attrs = &p->attrs;
1145 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1146
1147 verf[0] = jiffies;
1148 verf[1] = current->pid;
1149 memcpy(p->o_arg.u.verifier.data, verf,
1150 sizeof(p->o_arg.u.verifier.data));
1151 }
1152 p->c_arg.fh = &p->o_res.fh;
1153 p->c_arg.stateid = &p->o_res.stateid;
1154 p->c_arg.seqid = p->o_arg.seqid;
1155 nfs4_init_opendata_res(p);
1156 kref_init(&p->kref);
1157 return p;
1158
1159err_free_label:
1160 nfs4_label_free(p->a_label);
1161err_free_f:
1162 nfs4_label_free(p->f_label);
1163err_free_p:
1164 kfree(p);
1165err:
1166 dput(parent);
1167 return NULL;
1168}
1169
1170static void nfs4_opendata_free(struct kref *kref)
1171{
1172 struct nfs4_opendata *p = container_of(kref,
1173 struct nfs4_opendata, kref);
1174 struct super_block *sb = p->dentry->d_sb;
1175
1176 nfs_free_seqid(p->o_arg.seqid);
1177 if (p->state != NULL)
1178 nfs4_put_open_state(p->state);
1179 nfs4_put_state_owner(p->owner);
1180
1181 nfs4_label_free(p->a_label);
1182 nfs4_label_free(p->f_label);
1183
1184 dput(p->dir);
1185 dput(p->dentry);
1186 nfs_sb_deactive(sb);
1187 nfs_fattr_free_names(&p->f_attr);
1188 kfree(p->f_attr.mdsthreshold);
1189 kfree(p);
1190}
1191
1192static void nfs4_opendata_put(struct nfs4_opendata *p)
1193{
1194 if (p != NULL)
1195 kref_put(&p->kref, nfs4_opendata_free);
1196}
1197
1198static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1199{
1200 int ret;
1201
1202 ret = rpc_wait_for_completion_task(task);
1203 return ret;
1204}
1205
1206static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1207 fmode_t fmode)
1208{
1209 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1210 case FMODE_READ|FMODE_WRITE:
1211 return state->n_rdwr != 0;
1212 case FMODE_WRITE:
1213 return state->n_wronly != 0;
1214 case FMODE_READ:
1215 return state->n_rdonly != 0;
1216 }
1217 WARN_ON_ONCE(1);
1218 return false;
1219}
1220
1221static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1222{
1223 int ret = 0;
1224
1225 if (open_mode & (O_EXCL|O_TRUNC))
1226 goto out;
1227 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1228 case FMODE_READ:
1229 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1230 && state->n_rdonly != 0;
1231 break;
1232 case FMODE_WRITE:
1233 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1234 && state->n_wronly != 0;
1235 break;
1236 case FMODE_READ|FMODE_WRITE:
1237 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1238 && state->n_rdwr != 0;
1239 }
1240out:
1241 return ret;
1242}
1243
1244static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1245 enum open_claim_type4 claim)
1246{
1247 if (delegation == NULL)
1248 return 0;
1249 if ((delegation->type & fmode) != fmode)
1250 return 0;
1251 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1252 return 0;
1253 switch (claim) {
1254 case NFS4_OPEN_CLAIM_NULL:
1255 case NFS4_OPEN_CLAIM_FH:
1256 break;
1257 case NFS4_OPEN_CLAIM_PREVIOUS:
1258 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1259 break;
1260 default:
1261 return 0;
1262 }
1263 nfs_mark_delegation_referenced(delegation);
1264 return 1;
1265}
1266
1267static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1268{
1269 switch (fmode) {
1270 case FMODE_WRITE:
1271 state->n_wronly++;
1272 break;
1273 case FMODE_READ:
1274 state->n_rdonly++;
1275 break;
1276 case FMODE_READ|FMODE_WRITE:
1277 state->n_rdwr++;
1278 }
1279 nfs4_state_set_mode_locked(state, state->state | fmode);
1280}
1281
1282static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1283{
1284 struct nfs_client *clp = state->owner->so_server->nfs_client;
1285 bool need_recover = false;
1286
1287 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1288 need_recover = true;
1289 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1290 need_recover = true;
1291 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1292 need_recover = true;
1293 if (need_recover)
1294 nfs4_state_mark_reclaim_nograce(clp, state);
1295}
1296
1297static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1298 nfs4_stateid *stateid)
1299{
1300 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1301 return true;
1302 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1303 nfs_test_and_clear_all_open_stateid(state);
1304 return true;
1305 }
1306 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1307 return true;
1308 return false;
1309}
1310
1311static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1312{
1313 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1314 return;
1315 if (state->n_wronly)
1316 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1317 if (state->n_rdonly)
1318 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1319 if (state->n_rdwr)
1320 set_bit(NFS_O_RDWR_STATE, &state->flags);
1321 set_bit(NFS_OPEN_STATE, &state->flags);
1322}
1323
1324static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1325 nfs4_stateid *arg_stateid,
1326 nfs4_stateid *stateid, fmode_t fmode)
1327{
1328 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1329 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1330 case FMODE_WRITE:
1331 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1332 break;
1333 case FMODE_READ:
1334 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1335 break;
1336 case 0:
1337 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1338 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1339 clear_bit(NFS_OPEN_STATE, &state->flags);
1340 }
1341 if (stateid == NULL)
1342 return;
1343 /* Handle races with OPEN */
1344 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1345 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1346 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
1347 nfs_resync_open_stateid_locked(state);
1348 return;
1349 }
1350 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1351 nfs4_stateid_copy(&state->stateid, stateid);
1352 nfs4_stateid_copy(&state->open_stateid, stateid);
1353}
1354
1355static void nfs_clear_open_stateid(struct nfs4_state *state,
1356 nfs4_stateid *arg_stateid,
1357 nfs4_stateid *stateid, fmode_t fmode)
1358{
1359 write_seqlock(&state->seqlock);
1360 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
1361 write_sequnlock(&state->seqlock);
1362 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1363 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1364}
1365
1366static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1367{
1368 switch (fmode) {
1369 case FMODE_READ:
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1371 break;
1372 case FMODE_WRITE:
1373 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1374 break;
1375 case FMODE_READ|FMODE_WRITE:
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 }
1378 if (!nfs_need_update_open_stateid(state, stateid))
1379 return;
1380 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1381 nfs4_stateid_copy(&state->stateid, stateid);
1382 nfs4_stateid_copy(&state->open_stateid, stateid);
1383}
1384
1385static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1386{
1387 /*
1388 * Protect the call to nfs4_state_set_mode_locked and
1389 * serialise the stateid update
1390 */
1391 spin_lock(&state->owner->so_lock);
1392 write_seqlock(&state->seqlock);
1393 if (deleg_stateid != NULL) {
1394 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1395 set_bit(NFS_DELEGATED_STATE, &state->flags);
1396 }
1397 if (open_stateid != NULL)
1398 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1399 write_sequnlock(&state->seqlock);
1400 update_open_stateflags(state, fmode);
1401 spin_unlock(&state->owner->so_lock);
1402}
1403
1404static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1405{
1406 struct nfs_inode *nfsi = NFS_I(state->inode);
1407 struct nfs_delegation *deleg_cur;
1408 int ret = 0;
1409
1410 fmode &= (FMODE_READ|FMODE_WRITE);
1411
1412 rcu_read_lock();
1413 deleg_cur = rcu_dereference(nfsi->delegation);
1414 if (deleg_cur == NULL)
1415 goto no_delegation;
1416
1417 spin_lock(&deleg_cur->lock);
1418 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1419 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1420 (deleg_cur->type & fmode) != fmode)
1421 goto no_delegation_unlock;
1422
1423 if (delegation == NULL)
1424 delegation = &deleg_cur->stateid;
1425 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1426 goto no_delegation_unlock;
1427
1428 nfs_mark_delegation_referenced(deleg_cur);
1429 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1430 ret = 1;
1431no_delegation_unlock:
1432 spin_unlock(&deleg_cur->lock);
1433no_delegation:
1434 rcu_read_unlock();
1435
1436 if (!ret && open_stateid != NULL) {
1437 __update_open_stateid(state, open_stateid, NULL, fmode);
1438 ret = 1;
1439 }
1440 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1441 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1442
1443 return ret;
1444}
1445
1446static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1447 const nfs4_stateid *stateid)
1448{
1449 struct nfs4_state *state = lsp->ls_state;
1450 bool ret = false;
1451
1452 spin_lock(&state->state_lock);
1453 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1454 goto out_noupdate;
1455 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1456 goto out_noupdate;
1457 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1458 ret = true;
1459out_noupdate:
1460 spin_unlock(&state->state_lock);
1461 return ret;
1462}
1463
1464static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1465{
1466 struct nfs_delegation *delegation;
1467
1468 rcu_read_lock();
1469 delegation = rcu_dereference(NFS_I(inode)->delegation);
1470 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1471 rcu_read_unlock();
1472 return;
1473 }
1474 rcu_read_unlock();
1475 nfs4_inode_return_delegation(inode);
1476}
1477
1478static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1479{
1480 struct nfs4_state *state = opendata->state;
1481 struct nfs_inode *nfsi = NFS_I(state->inode);
1482 struct nfs_delegation *delegation;
1483 int open_mode = opendata->o_arg.open_flags;
1484 fmode_t fmode = opendata->o_arg.fmode;
1485 enum open_claim_type4 claim = opendata->o_arg.claim;
1486 nfs4_stateid stateid;
1487 int ret = -EAGAIN;
1488
1489 for (;;) {
1490 spin_lock(&state->owner->so_lock);
1491 if (can_open_cached(state, fmode, open_mode)) {
1492 update_open_stateflags(state, fmode);
1493 spin_unlock(&state->owner->so_lock);
1494 goto out_return_state;
1495 }
1496 spin_unlock(&state->owner->so_lock);
1497 rcu_read_lock();
1498 delegation = rcu_dereference(nfsi->delegation);
1499 if (!can_open_delegated(delegation, fmode, claim)) {
1500 rcu_read_unlock();
1501 break;
1502 }
1503 /* Save the delegation */
1504 nfs4_stateid_copy(&stateid, &delegation->stateid);
1505 rcu_read_unlock();
1506 nfs_release_seqid(opendata->o_arg.seqid);
1507 if (!opendata->is_recover) {
1508 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1509 if (ret != 0)
1510 goto out;
1511 }
1512 ret = -EAGAIN;
1513
1514 /* Try to update the stateid using the delegation */
1515 if (update_open_stateid(state, NULL, &stateid, fmode))
1516 goto out_return_state;
1517 }
1518out:
1519 return ERR_PTR(ret);
1520out_return_state:
1521 atomic_inc(&state->count);
1522 return state;
1523}
1524
1525static void
1526nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1527{
1528 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1529 struct nfs_delegation *delegation;
1530 int delegation_flags = 0;
1531
1532 rcu_read_lock();
1533 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1534 if (delegation)
1535 delegation_flags = delegation->flags;
1536 rcu_read_unlock();
1537 switch (data->o_arg.claim) {
1538 default:
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1541 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1542 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1543 "returning a delegation for "
1544 "OPEN(CLAIM_DELEGATE_CUR)\n",
1545 clp->cl_hostname);
1546 return;
1547 }
1548 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1549 nfs_inode_set_delegation(state->inode,
1550 data->owner->so_cred,
1551 &data->o_res);
1552 else
1553 nfs_inode_reclaim_delegation(state->inode,
1554 data->owner->so_cred,
1555 &data->o_res);
1556}
1557
1558/*
1559 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1560 * and update the nfs4_state.
1561 */
1562static struct nfs4_state *
1563_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1564{
1565 struct inode *inode = data->state->inode;
1566 struct nfs4_state *state = data->state;
1567 int ret;
1568
1569 if (!data->rpc_done) {
1570 if (data->rpc_status) {
1571 ret = data->rpc_status;
1572 goto err;
1573 }
1574 /* cached opens have already been processed */
1575 goto update;
1576 }
1577
1578 ret = nfs_refresh_inode(inode, &data->f_attr);
1579 if (ret)
1580 goto err;
1581
1582 if (data->o_res.delegation_type != 0)
1583 nfs4_opendata_check_deleg(data, state);
1584update:
1585 update_open_stateid(state, &data->o_res.stateid, NULL,
1586 data->o_arg.fmode);
1587 atomic_inc(&state->count);
1588
1589 return state;
1590err:
1591 return ERR_PTR(ret);
1592
1593}
1594
1595static struct nfs4_state *
1596_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1597{
1598 struct inode *inode;
1599 struct nfs4_state *state = NULL;
1600 int ret;
1601
1602 if (!data->rpc_done) {
1603 state = nfs4_try_open_cached(data);
1604 trace_nfs4_cached_open(data->state);
1605 goto out;
1606 }
1607
1608 ret = -EAGAIN;
1609 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1610 goto err;
1611 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1612 ret = PTR_ERR(inode);
1613 if (IS_ERR(inode))
1614 goto err;
1615 ret = -ENOMEM;
1616 state = nfs4_get_open_state(inode, data->owner);
1617 if (state == NULL)
1618 goto err_put_inode;
1619 if (data->o_res.delegation_type != 0)
1620 nfs4_opendata_check_deleg(data, state);
1621 update_open_stateid(state, &data->o_res.stateid, NULL,
1622 data->o_arg.fmode);
1623 iput(inode);
1624out:
1625 nfs_release_seqid(data->o_arg.seqid);
1626 return state;
1627err_put_inode:
1628 iput(inode);
1629err:
1630 return ERR_PTR(ret);
1631}
1632
1633static struct nfs4_state *
1634nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1635{
1636 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1637 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1638 return _nfs4_opendata_to_nfs4_state(data);
1639}
1640
1641static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1642{
1643 struct nfs_inode *nfsi = NFS_I(state->inode);
1644 struct nfs_open_context *ctx;
1645
1646 spin_lock(&state->inode->i_lock);
1647 list_for_each_entry(ctx, &nfsi->open_files, list) {
1648 if (ctx->state != state)
1649 continue;
1650 get_nfs_open_context(ctx);
1651 spin_unlock(&state->inode->i_lock);
1652 return ctx;
1653 }
1654 spin_unlock(&state->inode->i_lock);
1655 return ERR_PTR(-ENOENT);
1656}
1657
1658static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1659 struct nfs4_state *state, enum open_claim_type4 claim)
1660{
1661 struct nfs4_opendata *opendata;
1662
1663 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1664 NULL, NULL, claim, GFP_NOFS);
1665 if (opendata == NULL)
1666 return ERR_PTR(-ENOMEM);
1667 opendata->state = state;
1668 atomic_inc(&state->count);
1669 return opendata;
1670}
1671
1672static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1673 fmode_t fmode)
1674{
1675 struct nfs4_state *newstate;
1676 int ret;
1677
1678 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1679 return 0;
1680 opendata->o_arg.open_flags = 0;
1681 opendata->o_arg.fmode = fmode;
1682 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1683 NFS_SB(opendata->dentry->d_sb),
1684 fmode, 0);
1685 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1686 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1687 nfs4_init_opendata_res(opendata);
1688 ret = _nfs4_recover_proc_open(opendata);
1689 if (ret != 0)
1690 return ret;
1691 newstate = nfs4_opendata_to_nfs4_state(opendata);
1692 if (IS_ERR(newstate))
1693 return PTR_ERR(newstate);
1694 if (newstate != opendata->state)
1695 ret = -ESTALE;
1696 nfs4_close_state(newstate, fmode);
1697 return ret;
1698}
1699
1700static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1701{
1702 int ret;
1703
1704 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1705 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1706 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1707 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1708 /* memory barrier prior to reading state->n_* */
1709 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1710 clear_bit(NFS_OPEN_STATE, &state->flags);
1711 smp_rmb();
1712 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1713 if (ret != 0)
1714 return ret;
1715 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1716 if (ret != 0)
1717 return ret;
1718 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1719 if (ret != 0)
1720 return ret;
1721 /*
1722 * We may have performed cached opens for all three recoveries.
1723 * Check if we need to update the current stateid.
1724 */
1725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1726 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1727 write_seqlock(&state->seqlock);
1728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1729 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1730 write_sequnlock(&state->seqlock);
1731 }
1732 return 0;
1733}
1734
1735/*
1736 * OPEN_RECLAIM:
1737 * reclaim state on the server after a reboot.
1738 */
1739static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1740{
1741 struct nfs_delegation *delegation;
1742 struct nfs4_opendata *opendata;
1743 fmode_t delegation_type = 0;
1744 int status;
1745
1746 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1747 NFS4_OPEN_CLAIM_PREVIOUS);
1748 if (IS_ERR(opendata))
1749 return PTR_ERR(opendata);
1750 rcu_read_lock();
1751 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1752 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1753 delegation_type = delegation->type;
1754 rcu_read_unlock();
1755 opendata->o_arg.u.delegation_type = delegation_type;
1756 status = nfs4_open_recover(opendata, state);
1757 nfs4_opendata_put(opendata);
1758 return status;
1759}
1760
1761static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1762{
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 struct nfs4_exception exception = { };
1765 int err;
1766 do {
1767 err = _nfs4_do_open_reclaim(ctx, state);
1768 trace_nfs4_open_reclaim(ctx, 0, err);
1769 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1770 continue;
1771 if (err != -NFS4ERR_DELAY)
1772 break;
1773 nfs4_handle_exception(server, err, &exception);
1774 } while (exception.retry);
1775 return err;
1776}
1777
1778static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1779{
1780 struct nfs_open_context *ctx;
1781 int ret;
1782
1783 ctx = nfs4_state_find_open_context(state);
1784 if (IS_ERR(ctx))
1785 return -EAGAIN;
1786 ret = nfs4_do_open_reclaim(ctx, state);
1787 put_nfs_open_context(ctx);
1788 return ret;
1789}
1790
1791static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1792{
1793 switch (err) {
1794 default:
1795 printk(KERN_ERR "NFS: %s: unhandled error "
1796 "%d.\n", __func__, err);
1797 case 0:
1798 case -ENOENT:
1799 case -EAGAIN:
1800 case -ESTALE:
1801 break;
1802 case -NFS4ERR_BADSESSION:
1803 case -NFS4ERR_BADSLOT:
1804 case -NFS4ERR_BAD_HIGH_SLOT:
1805 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1806 case -NFS4ERR_DEADSESSION:
1807 set_bit(NFS_DELEGATED_STATE, &state->flags);
1808 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1809 return -EAGAIN;
1810 case -NFS4ERR_STALE_CLIENTID:
1811 case -NFS4ERR_STALE_STATEID:
1812 set_bit(NFS_DELEGATED_STATE, &state->flags);
1813 case -NFS4ERR_EXPIRED:
1814 /* Don't recall a delegation if it was lost */
1815 nfs4_schedule_lease_recovery(server->nfs_client);
1816 return -EAGAIN;
1817 case -NFS4ERR_MOVED:
1818 nfs4_schedule_migration_recovery(server);
1819 return -EAGAIN;
1820 case -NFS4ERR_LEASE_MOVED:
1821 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1822 return -EAGAIN;
1823 case -NFS4ERR_DELEG_REVOKED:
1824 case -NFS4ERR_ADMIN_REVOKED:
1825 case -NFS4ERR_BAD_STATEID:
1826 case -NFS4ERR_OPENMODE:
1827 nfs_inode_find_state_and_recover(state->inode,
1828 stateid);
1829 nfs4_schedule_stateid_recovery(server, state);
1830 return -EAGAIN;
1831 case -NFS4ERR_DELAY:
1832 case -NFS4ERR_GRACE:
1833 set_bit(NFS_DELEGATED_STATE, &state->flags);
1834 ssleep(1);
1835 return -EAGAIN;
1836 case -ENOMEM:
1837 case -NFS4ERR_DENIED:
1838 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1839 return 0;
1840 }
1841 return err;
1842}
1843
1844int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1845 struct nfs4_state *state, const nfs4_stateid *stateid,
1846 fmode_t type)
1847{
1848 struct nfs_server *server = NFS_SERVER(state->inode);
1849 struct nfs4_opendata *opendata;
1850 int err = 0;
1851
1852 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1853 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1854 if (IS_ERR(opendata))
1855 return PTR_ERR(opendata);
1856 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1857 write_seqlock(&state->seqlock);
1858 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1859 write_sequnlock(&state->seqlock);
1860 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1861 switch (type & (FMODE_READ|FMODE_WRITE)) {
1862 case FMODE_READ|FMODE_WRITE:
1863 case FMODE_WRITE:
1864 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1865 if (err)
1866 break;
1867 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1868 if (err)
1869 break;
1870 case FMODE_READ:
1871 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1872 }
1873 nfs4_opendata_put(opendata);
1874 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1875}
1876
1877static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1878{
1879 struct nfs4_opendata *data = calldata;
1880
1881 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1882 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1883}
1884
1885static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1886{
1887 struct nfs4_opendata *data = calldata;
1888
1889 nfs40_sequence_done(task, &data->c_res.seq_res);
1890
1891 data->rpc_status = task->tk_status;
1892 if (data->rpc_status == 0) {
1893 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1894 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1895 renew_lease(data->o_res.server, data->timestamp);
1896 data->rpc_done = 1;
1897 }
1898}
1899
1900static void nfs4_open_confirm_release(void *calldata)
1901{
1902 struct nfs4_opendata *data = calldata;
1903 struct nfs4_state *state = NULL;
1904
1905 /* If this request hasn't been cancelled, do nothing */
1906 if (data->cancelled == 0)
1907 goto out_free;
1908 /* In case of error, no cleanup! */
1909 if (!data->rpc_done)
1910 goto out_free;
1911 state = nfs4_opendata_to_nfs4_state(data);
1912 if (!IS_ERR(state))
1913 nfs4_close_state(state, data->o_arg.fmode);
1914out_free:
1915 nfs4_opendata_put(data);
1916}
1917
1918static const struct rpc_call_ops nfs4_open_confirm_ops = {
1919 .rpc_call_prepare = nfs4_open_confirm_prepare,
1920 .rpc_call_done = nfs4_open_confirm_done,
1921 .rpc_release = nfs4_open_confirm_release,
1922};
1923
1924/*
1925 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1926 */
1927static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1928{
1929 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1930 struct rpc_task *task;
1931 struct rpc_message msg = {
1932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1933 .rpc_argp = &data->c_arg,
1934 .rpc_resp = &data->c_res,
1935 .rpc_cred = data->owner->so_cred,
1936 };
1937 struct rpc_task_setup task_setup_data = {
1938 .rpc_client = server->client,
1939 .rpc_message = &msg,
1940 .callback_ops = &nfs4_open_confirm_ops,
1941 .callback_data = data,
1942 .workqueue = nfsiod_workqueue,
1943 .flags = RPC_TASK_ASYNC,
1944 };
1945 int status;
1946
1947 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1948 kref_get(&data->kref);
1949 data->rpc_done = 0;
1950 data->rpc_status = 0;
1951 data->timestamp = jiffies;
1952 if (data->is_recover)
1953 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
1954 task = rpc_run_task(&task_setup_data);
1955 if (IS_ERR(task))
1956 return PTR_ERR(task);
1957 status = nfs4_wait_for_completion_rpc_task(task);
1958 if (status != 0) {
1959 data->cancelled = 1;
1960 smp_wmb();
1961 } else
1962 status = data->rpc_status;
1963 rpc_put_task(task);
1964 return status;
1965}
1966
1967static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1968{
1969 struct nfs4_opendata *data = calldata;
1970 struct nfs4_state_owner *sp = data->owner;
1971 struct nfs_client *clp = sp->so_server->nfs_client;
1972 enum open_claim_type4 claim = data->o_arg.claim;
1973
1974 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1975 goto out_wait;
1976 /*
1977 * Check if we still need to send an OPEN call, or if we can use
1978 * a delegation instead.
1979 */
1980 if (data->state != NULL) {
1981 struct nfs_delegation *delegation;
1982
1983 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1984 goto out_no_action;
1985 rcu_read_lock();
1986 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1987 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
1988 goto unlock_no_action;
1989 rcu_read_unlock();
1990 }
1991 /* Update client id. */
1992 data->o_arg.clientid = clp->cl_clientid;
1993 switch (claim) {
1994 default:
1995 break;
1996 case NFS4_OPEN_CLAIM_PREVIOUS:
1997 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1998 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1999 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2000 case NFS4_OPEN_CLAIM_FH:
2001 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2002 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2003 }
2004 data->timestamp = jiffies;
2005 if (nfs4_setup_sequence(data->o_arg.server,
2006 &data->o_arg.seq_args,
2007 &data->o_res.seq_res,
2008 task) != 0)
2009 nfs_release_seqid(data->o_arg.seqid);
2010
2011 /* Set the create mode (note dependency on the session type) */
2012 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2013 if (data->o_arg.open_flags & O_EXCL) {
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2015 if (nfs4_has_persistent_session(clp))
2016 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2017 else if (clp->cl_mvops->minor_version > 0)
2018 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2019 }
2020 return;
2021unlock_no_action:
2022 trace_nfs4_cached_open(data->state);
2023 rcu_read_unlock();
2024out_no_action:
2025 task->tk_action = NULL;
2026out_wait:
2027 nfs4_sequence_done(task, &data->o_res.seq_res);
2028}
2029
2030static void nfs4_open_done(struct rpc_task *task, void *calldata)
2031{
2032 struct nfs4_opendata *data = calldata;
2033
2034 data->rpc_status = task->tk_status;
2035
2036 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2037 return;
2038
2039 if (task->tk_status == 0) {
2040 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2041 switch (data->o_res.f_attr->mode & S_IFMT) {
2042 case S_IFREG:
2043 break;
2044 case S_IFLNK:
2045 data->rpc_status = -ELOOP;
2046 break;
2047 case S_IFDIR:
2048 data->rpc_status = -EISDIR;
2049 break;
2050 default:
2051 data->rpc_status = -ENOTDIR;
2052 }
2053 }
2054 renew_lease(data->o_res.server, data->timestamp);
2055 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2056 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2057 }
2058 data->rpc_done = 1;
2059}
2060
2061static void nfs4_open_release(void *calldata)
2062{
2063 struct nfs4_opendata *data = calldata;
2064 struct nfs4_state *state = NULL;
2065
2066 /* If this request hasn't been cancelled, do nothing */
2067 if (data->cancelled == 0)
2068 goto out_free;
2069 /* In case of error, no cleanup! */
2070 if (data->rpc_status != 0 || !data->rpc_done)
2071 goto out_free;
2072 /* In case we need an open_confirm, no cleanup! */
2073 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2074 goto out_free;
2075 state = nfs4_opendata_to_nfs4_state(data);
2076 if (!IS_ERR(state))
2077 nfs4_close_state(state, data->o_arg.fmode);
2078out_free:
2079 nfs4_opendata_put(data);
2080}
2081
2082static const struct rpc_call_ops nfs4_open_ops = {
2083 .rpc_call_prepare = nfs4_open_prepare,
2084 .rpc_call_done = nfs4_open_done,
2085 .rpc_release = nfs4_open_release,
2086};
2087
2088static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2089{
2090 struct inode *dir = d_inode(data->dir);
2091 struct nfs_server *server = NFS_SERVER(dir);
2092 struct nfs_openargs *o_arg = &data->o_arg;
2093 struct nfs_openres *o_res = &data->o_res;
2094 struct rpc_task *task;
2095 struct rpc_message msg = {
2096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2097 .rpc_argp = o_arg,
2098 .rpc_resp = o_res,
2099 .rpc_cred = data->owner->so_cred,
2100 };
2101 struct rpc_task_setup task_setup_data = {
2102 .rpc_client = server->client,
2103 .rpc_message = &msg,
2104 .callback_ops = &nfs4_open_ops,
2105 .callback_data = data,
2106 .workqueue = nfsiod_workqueue,
2107 .flags = RPC_TASK_ASYNC,
2108 };
2109 int status;
2110
2111 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2112 kref_get(&data->kref);
2113 data->rpc_done = 0;
2114 data->rpc_status = 0;
2115 data->cancelled = 0;
2116 data->is_recover = 0;
2117 if (isrecover) {
2118 nfs4_set_sequence_privileged(&o_arg->seq_args);
2119 data->is_recover = 1;
2120 }
2121 task = rpc_run_task(&task_setup_data);
2122 if (IS_ERR(task))
2123 return PTR_ERR(task);
2124 status = nfs4_wait_for_completion_rpc_task(task);
2125 if (status != 0) {
2126 data->cancelled = 1;
2127 smp_wmb();
2128 } else
2129 status = data->rpc_status;
2130 rpc_put_task(task);
2131
2132 return status;
2133}
2134
2135static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2136{
2137 struct inode *dir = d_inode(data->dir);
2138 struct nfs_openres *o_res = &data->o_res;
2139 int status;
2140
2141 status = nfs4_run_open_task(data, 1);
2142 if (status != 0 || !data->rpc_done)
2143 return status;
2144
2145 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2146
2147 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2148 status = _nfs4_proc_open_confirm(data);
2149 if (status != 0)
2150 return status;
2151 }
2152
2153 return status;
2154}
2155
2156/*
2157 * Additional permission checks in order to distinguish between an
2158 * open for read, and an open for execute. This works around the
2159 * fact that NFSv4 OPEN treats read and execute permissions as being
2160 * the same.
2161 * Note that in the non-execute case, we want to turn off permission
2162 * checking if we just created a new file (POSIX open() semantics).
2163 */
2164static int nfs4_opendata_access(struct rpc_cred *cred,
2165 struct nfs4_opendata *opendata,
2166 struct nfs4_state *state, fmode_t fmode,
2167 int openflags)
2168{
2169 struct nfs_access_entry cache;
2170 u32 mask;
2171
2172 /* access call failed or for some reason the server doesn't
2173 * support any access modes -- defer access call until later */
2174 if (opendata->o_res.access_supported == 0)
2175 return 0;
2176
2177 mask = 0;
2178 /*
2179 * Use openflags to check for exec, because fmode won't
2180 * always have FMODE_EXEC set when file open for exec.
2181 */
2182 if (openflags & __FMODE_EXEC) {
2183 /* ONLY check for exec rights */
2184 mask = MAY_EXEC;
2185 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2186 mask = MAY_READ;
2187
2188 cache.cred = cred;
2189 cache.jiffies = jiffies;
2190 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2191 nfs_access_add_cache(state->inode, &cache);
2192
2193 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2194 return 0;
2195
2196 /* even though OPEN succeeded, access is denied. Close the file */
2197 nfs4_close_state(state, fmode);
2198 return -EACCES;
2199}
2200
2201/*
2202 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2203 */
2204static int _nfs4_proc_open(struct nfs4_opendata *data)
2205{
2206 struct inode *dir = d_inode(data->dir);
2207 struct nfs_server *server = NFS_SERVER(dir);
2208 struct nfs_openargs *o_arg = &data->o_arg;
2209 struct nfs_openres *o_res = &data->o_res;
2210 int status;
2211
2212 status = nfs4_run_open_task(data, 0);
2213 if (!data->rpc_done)
2214 return status;
2215 if (status != 0) {
2216 if (status == -NFS4ERR_BADNAME &&
2217 !(o_arg->open_flags & O_CREAT))
2218 return -ENOENT;
2219 return status;
2220 }
2221
2222 nfs_fattr_map_and_free_names(server, &data->f_attr);
2223
2224 if (o_arg->open_flags & O_CREAT) {
2225 update_changeattr(dir, &o_res->cinfo);
2226 if (o_arg->open_flags & O_EXCL)
2227 data->file_created = 1;
2228 else if (o_res->cinfo.before != o_res->cinfo.after)
2229 data->file_created = 1;
2230 }
2231 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2232 server->caps &= ~NFS_CAP_POSIX_LOCK;
2233 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2234 status = _nfs4_proc_open_confirm(data);
2235 if (status != 0)
2236 return status;
2237 }
2238 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2239 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2240 return 0;
2241}
2242
2243static int nfs4_recover_expired_lease(struct nfs_server *server)
2244{
2245 return nfs4_client_recover_expired_lease(server->nfs_client);
2246}
2247
2248/*
2249 * OPEN_EXPIRED:
2250 * reclaim state on the server after a network partition.
2251 * Assumes caller holds the appropriate lock
2252 */
2253static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2254{
2255 struct nfs4_opendata *opendata;
2256 int ret;
2257
2258 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2259 NFS4_OPEN_CLAIM_FH);
2260 if (IS_ERR(opendata))
2261 return PTR_ERR(opendata);
2262 ret = nfs4_open_recover(opendata, state);
2263 if (ret == -ESTALE)
2264 d_drop(ctx->dentry);
2265 nfs4_opendata_put(opendata);
2266 return ret;
2267}
2268
2269static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2270{
2271 struct nfs_server *server = NFS_SERVER(state->inode);
2272 struct nfs4_exception exception = { };
2273 int err;
2274
2275 do {
2276 err = _nfs4_open_expired(ctx, state);
2277 trace_nfs4_open_expired(ctx, 0, err);
2278 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2279 continue;
2280 switch (err) {
2281 default:
2282 goto out;
2283 case -NFS4ERR_GRACE:
2284 case -NFS4ERR_DELAY:
2285 nfs4_handle_exception(server, err, &exception);
2286 err = 0;
2287 }
2288 } while (exception.retry);
2289out:
2290 return err;
2291}
2292
2293static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2294{
2295 struct nfs_open_context *ctx;
2296 int ret;
2297
2298 ctx = nfs4_state_find_open_context(state);
2299 if (IS_ERR(ctx))
2300 return -EAGAIN;
2301 ret = nfs4_do_open_expired(ctx, state);
2302 put_nfs_open_context(ctx);
2303 return ret;
2304}
2305
2306static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2307{
2308 nfs_remove_bad_delegation(state->inode);
2309 write_seqlock(&state->seqlock);
2310 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2311 write_sequnlock(&state->seqlock);
2312 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2313}
2314
2315static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2316{
2317 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2318 nfs_finish_clear_delegation_stateid(state);
2319}
2320
2321static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2322{
2323 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2324 nfs40_clear_delegation_stateid(state);
2325 return nfs4_open_expired(sp, state);
2326}
2327
2328#if defined(CONFIG_NFS_V4_1)
2329static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2330{
2331 struct nfs_server *server = NFS_SERVER(state->inode);
2332 nfs4_stateid stateid;
2333 struct nfs_delegation *delegation;
2334 struct rpc_cred *cred;
2335 int status;
2336
2337 /* Get the delegation credential for use by test/free_stateid */
2338 rcu_read_lock();
2339 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2340 if (delegation == NULL) {
2341 rcu_read_unlock();
2342 return;
2343 }
2344
2345 nfs4_stateid_copy(&stateid, &delegation->stateid);
2346 cred = get_rpccred(delegation->cred);
2347 rcu_read_unlock();
2348 status = nfs41_test_stateid(server, &stateid, cred);
2349 trace_nfs4_test_delegation_stateid(state, NULL, status);
2350
2351 if (status != NFS_OK) {
2352 /* Free the stateid unless the server explicitly
2353 * informs us the stateid is unrecognized. */
2354 if (status != -NFS4ERR_BAD_STATEID)
2355 nfs41_free_stateid(server, &stateid, cred);
2356 nfs_finish_clear_delegation_stateid(state);
2357 }
2358
2359 put_rpccred(cred);
2360}
2361
2362/**
2363 * nfs41_check_open_stateid - possibly free an open stateid
2364 *
2365 * @state: NFSv4 state for an inode
2366 *
2367 * Returns NFS_OK if recovery for this stateid is now finished.
2368 * Otherwise a negative NFS4ERR value is returned.
2369 */
2370static int nfs41_check_open_stateid(struct nfs4_state *state)
2371{
2372 struct nfs_server *server = NFS_SERVER(state->inode);
2373 nfs4_stateid *stateid = &state->open_stateid;
2374 struct rpc_cred *cred = state->owner->so_cred;
2375 int status;
2376
2377 /* If a state reset has been done, test_stateid is unneeded */
2378 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2379 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2380 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2381 return -NFS4ERR_BAD_STATEID;
2382
2383 status = nfs41_test_stateid(server, stateid, cred);
2384 trace_nfs4_test_open_stateid(state, NULL, status);
2385 if (status != NFS_OK) {
2386 /* Free the stateid unless the server explicitly
2387 * informs us the stateid is unrecognized. */
2388 if (status != -NFS4ERR_BAD_STATEID)
2389 nfs41_free_stateid(server, stateid, cred);
2390
2391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2392 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2393 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2394 clear_bit(NFS_OPEN_STATE, &state->flags);
2395 }
2396 return status;
2397}
2398
2399static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2400{
2401 int status;
2402
2403 nfs41_check_delegation_stateid(state);
2404 status = nfs41_check_open_stateid(state);
2405 if (status != NFS_OK)
2406 status = nfs4_open_expired(sp, state);
2407 return status;
2408}
2409#endif
2410
2411/*
2412 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2413 * fields corresponding to attributes that were used to store the verifier.
2414 * Make sure we clobber those fields in the later setattr call
2415 */
2416static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2417 struct iattr *sattr, struct nfs4_label **label)
2418{
2419 const u32 *attrset = opendata->o_res.attrset;
2420
2421 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2422 !(sattr->ia_valid & ATTR_ATIME_SET))
2423 sattr->ia_valid |= ATTR_ATIME;
2424
2425 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2426 !(sattr->ia_valid & ATTR_MTIME_SET))
2427 sattr->ia_valid |= ATTR_MTIME;
2428
2429 /* Except MODE, it seems harmless of setting twice. */
2430 if ((attrset[1] & FATTR4_WORD1_MODE))
2431 sattr->ia_valid &= ~ATTR_MODE;
2432
2433 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2434 *label = NULL;
2435}
2436
2437static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2438 fmode_t fmode,
2439 int flags,
2440 struct nfs_open_context *ctx)
2441{
2442 struct nfs4_state_owner *sp = opendata->owner;
2443 struct nfs_server *server = sp->so_server;
2444 struct dentry *dentry;
2445 struct nfs4_state *state;
2446 unsigned int seq;
2447 int ret;
2448
2449 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2450
2451 ret = _nfs4_proc_open(opendata);
2452 if (ret != 0)
2453 goto out;
2454
2455 state = nfs4_opendata_to_nfs4_state(opendata);
2456 ret = PTR_ERR(state);
2457 if (IS_ERR(state))
2458 goto out;
2459 if (server->caps & NFS_CAP_POSIX_LOCK)
2460 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2461
2462 dentry = opendata->dentry;
2463 if (d_really_is_negative(dentry)) {
2464 /* FIXME: Is this d_drop() ever needed? */
2465 d_drop(dentry);
2466 dentry = d_add_unique(dentry, igrab(state->inode));
2467 if (dentry == NULL) {
2468 dentry = opendata->dentry;
2469 } else if (dentry != ctx->dentry) {
2470 dput(ctx->dentry);
2471 ctx->dentry = dget(dentry);
2472 }
2473 nfs_set_verifier(dentry,
2474 nfs_save_change_attribute(d_inode(opendata->dir)));
2475 }
2476
2477 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2478 if (ret != 0)
2479 goto out;
2480
2481 ctx->state = state;
2482 if (d_inode(dentry) == state->inode) {
2483 nfs_inode_attach_open_context(ctx);
2484 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2485 nfs4_schedule_stateid_recovery(server, state);
2486 }
2487out:
2488 return ret;
2489}
2490
2491/*
2492 * Returns a referenced nfs4_state
2493 */
2494static int _nfs4_do_open(struct inode *dir,
2495 struct nfs_open_context *ctx,
2496 int flags,
2497 struct iattr *sattr,
2498 struct nfs4_label *label,
2499 int *opened)
2500{
2501 struct nfs4_state_owner *sp;
2502 struct nfs4_state *state = NULL;
2503 struct nfs_server *server = NFS_SERVER(dir);
2504 struct nfs4_opendata *opendata;
2505 struct dentry *dentry = ctx->dentry;
2506 struct rpc_cred *cred = ctx->cred;
2507 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2508 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2509 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2510 struct nfs4_label *olabel = NULL;
2511 int status;
2512
2513 /* Protect against reboot recovery conflicts */
2514 status = -ENOMEM;
2515 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2516 if (sp == NULL) {
2517 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2518 goto out_err;
2519 }
2520 status = nfs4_recover_expired_lease(server);
2521 if (status != 0)
2522 goto err_put_state_owner;
2523 if (d_really_is_positive(dentry))
2524 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2525 status = -ENOMEM;
2526 if (d_really_is_positive(dentry))
2527 claim = NFS4_OPEN_CLAIM_FH;
2528 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2529 label, claim, GFP_KERNEL);
2530 if (opendata == NULL)
2531 goto err_put_state_owner;
2532
2533 if (label) {
2534 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2535 if (IS_ERR(olabel)) {
2536 status = PTR_ERR(olabel);
2537 goto err_opendata_put;
2538 }
2539 }
2540
2541 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2542 if (!opendata->f_attr.mdsthreshold) {
2543 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2544 if (!opendata->f_attr.mdsthreshold)
2545 goto err_free_label;
2546 }
2547 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2548 }
2549 if (d_really_is_positive(dentry))
2550 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2551
2552 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2553 if (status != 0)
2554 goto err_free_label;
2555 state = ctx->state;
2556
2557 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2558 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2559 nfs4_exclusive_attrset(opendata, sattr, &label);
2560
2561 nfs_fattr_init(opendata->o_res.f_attr);
2562 status = nfs4_do_setattr(state->inode, cred,
2563 opendata->o_res.f_attr, sattr,
2564 state, label, olabel);
2565 if (status == 0) {
2566 nfs_setattr_update_inode(state->inode, sattr,
2567 opendata->o_res.f_attr);
2568 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2569 }
2570 }
2571 if (opened && opendata->file_created)
2572 *opened |= FILE_CREATED;
2573
2574 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2575 *ctx_th = opendata->f_attr.mdsthreshold;
2576 opendata->f_attr.mdsthreshold = NULL;
2577 }
2578
2579 nfs4_label_free(olabel);
2580
2581 nfs4_opendata_put(opendata);
2582 nfs4_put_state_owner(sp);
2583 return 0;
2584err_free_label:
2585 nfs4_label_free(olabel);
2586err_opendata_put:
2587 nfs4_opendata_put(opendata);
2588err_put_state_owner:
2589 nfs4_put_state_owner(sp);
2590out_err:
2591 return status;
2592}
2593
2594
2595static struct nfs4_state *nfs4_do_open(struct inode *dir,
2596 struct nfs_open_context *ctx,
2597 int flags,
2598 struct iattr *sattr,
2599 struct nfs4_label *label,
2600 int *opened)
2601{
2602 struct nfs_server *server = NFS_SERVER(dir);
2603 struct nfs4_exception exception = { };
2604 struct nfs4_state *res;
2605 int status;
2606
2607 do {
2608 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2609 res = ctx->state;
2610 trace_nfs4_open_file(ctx, flags, status);
2611 if (status == 0)
2612 break;
2613 /* NOTE: BAD_SEQID means the server and client disagree about the
2614 * book-keeping w.r.t. state-changing operations
2615 * (OPEN/CLOSE/LOCK/LOCKU...)
2616 * It is actually a sign of a bug on the client or on the server.
2617 *
2618 * If we receive a BAD_SEQID error in the particular case of
2619 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2620 * have unhashed the old state_owner for us, and that we can
2621 * therefore safely retry using a new one. We should still warn
2622 * the user though...
2623 */
2624 if (status == -NFS4ERR_BAD_SEQID) {
2625 pr_warn_ratelimited("NFS: v4 server %s "
2626 " returned a bad sequence-id error!\n",
2627 NFS_SERVER(dir)->nfs_client->cl_hostname);
2628 exception.retry = 1;
2629 continue;
2630 }
2631 /*
2632 * BAD_STATEID on OPEN means that the server cancelled our
2633 * state before it received the OPEN_CONFIRM.
2634 * Recover by retrying the request as per the discussion
2635 * on Page 181 of RFC3530.
2636 */
2637 if (status == -NFS4ERR_BAD_STATEID) {
2638 exception.retry = 1;
2639 continue;
2640 }
2641 if (status == -EAGAIN) {
2642 /* We must have found a delegation */
2643 exception.retry = 1;
2644 continue;
2645 }
2646 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2647 continue;
2648 res = ERR_PTR(nfs4_handle_exception(server,
2649 status, &exception));
2650 } while (exception.retry);
2651 return res;
2652}
2653
2654static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2655 struct nfs_fattr *fattr, struct iattr *sattr,
2656 struct nfs4_state *state, struct nfs4_label *ilabel,
2657 struct nfs4_label *olabel)
2658{
2659 struct nfs_server *server = NFS_SERVER(inode);
2660 struct nfs_setattrargs arg = {
2661 .fh = NFS_FH(inode),
2662 .iap = sattr,
2663 .server = server,
2664 .bitmask = server->attr_bitmask,
2665 .label = ilabel,
2666 };
2667 struct nfs_setattrres res = {
2668 .fattr = fattr,
2669 .label = olabel,
2670 .server = server,
2671 };
2672 struct rpc_message msg = {
2673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2674 .rpc_argp = &arg,
2675 .rpc_resp = &res,
2676 .rpc_cred = cred,
2677 };
2678 unsigned long timestamp = jiffies;
2679 fmode_t fmode;
2680 bool truncate;
2681 int status;
2682
2683 arg.bitmask = nfs4_bitmask(server, ilabel);
2684 if (ilabel)
2685 arg.bitmask = nfs4_bitmask(server, olabel);
2686
2687 nfs_fattr_init(fattr);
2688
2689 /* Servers should only apply open mode checks for file size changes */
2690 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2691 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2692
2693 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2694 /* Use that stateid */
2695 } else if (truncate && state != NULL) {
2696 struct nfs_lockowner lockowner = {
2697 .l_owner = current->files,
2698 .l_pid = current->tgid,
2699 };
2700 if (!nfs4_valid_open_stateid(state))
2701 return -EBADF;
2702 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2703 &lockowner) == -EIO)
2704 return -EBADF;
2705 } else
2706 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2707
2708 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2709 if (status == 0 && state != NULL)
2710 renew_lease(server, timestamp);
2711 trace_nfs4_setattr(inode, &arg.stateid, status);
2712 return status;
2713}
2714
2715static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2716 struct nfs_fattr *fattr, struct iattr *sattr,
2717 struct nfs4_state *state, struct nfs4_label *ilabel,
2718 struct nfs4_label *olabel)
2719{
2720 struct nfs_server *server = NFS_SERVER(inode);
2721 struct nfs4_exception exception = {
2722 .state = state,
2723 .inode = inode,
2724 };
2725 int err;
2726 do {
2727 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2728 switch (err) {
2729 case -NFS4ERR_OPENMODE:
2730 if (!(sattr->ia_valid & ATTR_SIZE)) {
2731 pr_warn_once("NFSv4: server %s is incorrectly "
2732 "applying open mode checks to "
2733 "a SETATTR that is not "
2734 "changing file size.\n",
2735 server->nfs_client->cl_hostname);
2736 }
2737 if (state && !(state->state & FMODE_WRITE)) {
2738 err = -EBADF;
2739 if (sattr->ia_valid & ATTR_OPEN)
2740 err = -EACCES;
2741 goto out;
2742 }
2743 }
2744 err = nfs4_handle_exception(server, err, &exception);
2745 } while (exception.retry);
2746out:
2747 return err;
2748}
2749
2750static bool
2751nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2752{
2753 if (inode == NULL || !nfs_have_layout(inode))
2754 return false;
2755
2756 return pnfs_wait_on_layoutreturn(inode, task);
2757}
2758
2759struct nfs4_closedata {
2760 struct inode *inode;
2761 struct nfs4_state *state;
2762 struct nfs_closeargs arg;
2763 struct nfs_closeres res;
2764 struct nfs_fattr fattr;
2765 unsigned long timestamp;
2766 bool roc;
2767 u32 roc_barrier;
2768};
2769
2770static void nfs4_free_closedata(void *data)
2771{
2772 struct nfs4_closedata *calldata = data;
2773 struct nfs4_state_owner *sp = calldata->state->owner;
2774 struct super_block *sb = calldata->state->inode->i_sb;
2775
2776 if (calldata->roc)
2777 pnfs_roc_release(calldata->state->inode);
2778 nfs4_put_open_state(calldata->state);
2779 nfs_free_seqid(calldata->arg.seqid);
2780 nfs4_put_state_owner(sp);
2781 nfs_sb_deactive(sb);
2782 kfree(calldata);
2783}
2784
2785static void nfs4_close_done(struct rpc_task *task, void *data)
2786{
2787 struct nfs4_closedata *calldata = data;
2788 struct nfs4_state *state = calldata->state;
2789 struct nfs_server *server = NFS_SERVER(calldata->inode);
2790 nfs4_stateid *res_stateid = NULL;
2791
2792 dprintk("%s: begin!\n", __func__);
2793 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2794 return;
2795 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2796 /* hmm. we are done with the inode, and in the process of freeing
2797 * the state_owner. we keep this around to process errors
2798 */
2799 switch (task->tk_status) {
2800 case 0:
2801 res_stateid = &calldata->res.stateid;
2802 if (calldata->roc)
2803 pnfs_roc_set_barrier(state->inode,
2804 calldata->roc_barrier);
2805 renew_lease(server, calldata->timestamp);
2806 break;
2807 case -NFS4ERR_ADMIN_REVOKED:
2808 case -NFS4ERR_STALE_STATEID:
2809 case -NFS4ERR_OLD_STATEID:
2810 case -NFS4ERR_BAD_STATEID:
2811 case -NFS4ERR_EXPIRED:
2812 if (!nfs4_stateid_match(&calldata->arg.stateid,
2813 &state->open_stateid)) {
2814 rpc_restart_call_prepare(task);
2815 goto out_release;
2816 }
2817 if (calldata->arg.fmode == 0)
2818 break;
2819 default:
2820 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2821 rpc_restart_call_prepare(task);
2822 goto out_release;
2823 }
2824 }
2825 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2826 res_stateid, calldata->arg.fmode);
2827out_release:
2828 nfs_release_seqid(calldata->arg.seqid);
2829 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2830 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2831}
2832
2833static void nfs4_close_prepare(struct rpc_task *task, void *data)
2834{
2835 struct nfs4_closedata *calldata = data;
2836 struct nfs4_state *state = calldata->state;
2837 struct inode *inode = calldata->inode;
2838 bool is_rdonly, is_wronly, is_rdwr;
2839 int call_close = 0;
2840
2841 dprintk("%s: begin!\n", __func__);
2842 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2843 goto out_wait;
2844
2845 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2846 spin_lock(&state->owner->so_lock);
2847 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2848 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2849 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2850 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
2851 /* Calculate the change in open mode */
2852 calldata->arg.fmode = 0;
2853 if (state->n_rdwr == 0) {
2854 if (state->n_rdonly == 0)
2855 call_close |= is_rdonly;
2856 else if (is_rdonly)
2857 calldata->arg.fmode |= FMODE_READ;
2858 if (state->n_wronly == 0)
2859 call_close |= is_wronly;
2860 else if (is_wronly)
2861 calldata->arg.fmode |= FMODE_WRITE;
2862 } else if (is_rdwr)
2863 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2864
2865 if (calldata->arg.fmode == 0)
2866 call_close |= is_rdwr;
2867
2868 if (!nfs4_valid_open_stateid(state))
2869 call_close = 0;
2870 spin_unlock(&state->owner->so_lock);
2871
2872 if (!call_close) {
2873 /* Note: exit _without_ calling nfs4_close_done */
2874 goto out_no_action;
2875 }
2876
2877 if (nfs4_wait_on_layoutreturn(inode, task)) {
2878 nfs_release_seqid(calldata->arg.seqid);
2879 goto out_wait;
2880 }
2881
2882 if (calldata->arg.fmode == 0)
2883 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2884 if (calldata->roc)
2885 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2886
2887 calldata->arg.share_access =
2888 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2889 calldata->arg.fmode, 0);
2890
2891 nfs_fattr_init(calldata->res.fattr);
2892 calldata->timestamp = jiffies;
2893 if (nfs4_setup_sequence(NFS_SERVER(inode),
2894 &calldata->arg.seq_args,
2895 &calldata->res.seq_res,
2896 task) != 0)
2897 nfs_release_seqid(calldata->arg.seqid);
2898 dprintk("%s: done!\n", __func__);
2899 return;
2900out_no_action:
2901 task->tk_action = NULL;
2902out_wait:
2903 nfs4_sequence_done(task, &calldata->res.seq_res);
2904}
2905
2906static const struct rpc_call_ops nfs4_close_ops = {
2907 .rpc_call_prepare = nfs4_close_prepare,
2908 .rpc_call_done = nfs4_close_done,
2909 .rpc_release = nfs4_free_closedata,
2910};
2911
2912static bool nfs4_roc(struct inode *inode)
2913{
2914 if (!nfs_have_layout(inode))
2915 return false;
2916 return pnfs_roc(inode);
2917}
2918
2919/*
2920 * It is possible for data to be read/written from a mem-mapped file
2921 * after the sys_close call (which hits the vfs layer as a flush).
2922 * This means that we can't safely call nfsv4 close on a file until
2923 * the inode is cleared. This in turn means that we are not good
2924 * NFSv4 citizens - we do not indicate to the server to update the file's
2925 * share state even when we are done with one of the three share
2926 * stateid's in the inode.
2927 *
2928 * NOTE: Caller must be holding the sp->so_owner semaphore!
2929 */
2930int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2931{
2932 struct nfs_server *server = NFS_SERVER(state->inode);
2933 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2934 struct nfs4_closedata *calldata;
2935 struct nfs4_state_owner *sp = state->owner;
2936 struct rpc_task *task;
2937 struct rpc_message msg = {
2938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2939 .rpc_cred = state->owner->so_cred,
2940 };
2941 struct rpc_task_setup task_setup_data = {
2942 .rpc_client = server->client,
2943 .rpc_message = &msg,
2944 .callback_ops = &nfs4_close_ops,
2945 .workqueue = nfsiod_workqueue,
2946 .flags = RPC_TASK_ASYNC,
2947 };
2948 int status = -ENOMEM;
2949
2950 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2951 &task_setup_data.rpc_client, &msg);
2952
2953 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2954 if (calldata == NULL)
2955 goto out;
2956 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2957 calldata->inode = state->inode;
2958 calldata->state = state;
2959 calldata->arg.fh = NFS_FH(state->inode);
2960 /* Serialization for the sequence id */
2961 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2962 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2963 if (IS_ERR(calldata->arg.seqid))
2964 goto out_free_calldata;
2965 calldata->arg.fmode = 0;
2966 calldata->arg.bitmask = server->cache_consistency_bitmask;
2967 calldata->res.fattr = &calldata->fattr;
2968 calldata->res.seqid = calldata->arg.seqid;
2969 calldata->res.server = server;
2970 calldata->roc = nfs4_roc(state->inode);
2971 nfs_sb_active(calldata->inode->i_sb);
2972
2973 msg.rpc_argp = &calldata->arg;
2974 msg.rpc_resp = &calldata->res;
2975 task_setup_data.callback_data = calldata;
2976 task = rpc_run_task(&task_setup_data);
2977 if (IS_ERR(task))
2978 return PTR_ERR(task);
2979 status = 0;
2980 if (wait)
2981 status = rpc_wait_for_completion_task(task);
2982 rpc_put_task(task);
2983 return status;
2984out_free_calldata:
2985 kfree(calldata);
2986out:
2987 nfs4_put_open_state(state);
2988 nfs4_put_state_owner(sp);
2989 return status;
2990}
2991
2992static struct inode *
2993nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2994 int open_flags, struct iattr *attr, int *opened)
2995{
2996 struct nfs4_state *state;
2997 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2998
2999 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3000
3001 /* Protect against concurrent sillydeletes */
3002 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3003
3004 nfs4_label_release_security(label);
3005
3006 if (IS_ERR(state))
3007 return ERR_CAST(state);
3008 return state->inode;
3009}
3010
3011static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3012{
3013 if (ctx->state == NULL)
3014 return;
3015 if (is_sync)
3016 nfs4_close_sync(ctx->state, ctx->mode);
3017 else
3018 nfs4_close_state(ctx->state, ctx->mode);
3019}
3020
3021#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3022#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3023#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
3024
3025static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3026{
3027 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3028 struct nfs4_server_caps_arg args = {
3029 .fhandle = fhandle,
3030 .bitmask = bitmask,
3031 };
3032 struct nfs4_server_caps_res res = {};
3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3035 .rpc_argp = &args,
3036 .rpc_resp = &res,
3037 };
3038 int status;
3039
3040 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3041 FATTR4_WORD0_FH_EXPIRE_TYPE |
3042 FATTR4_WORD0_LINK_SUPPORT |
3043 FATTR4_WORD0_SYMLINK_SUPPORT |
3044 FATTR4_WORD0_ACLSUPPORT;
3045 if (minorversion)
3046 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3047
3048 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3049 if (status == 0) {
3050 /* Sanity check the server answers */
3051 switch (minorversion) {
3052 case 0:
3053 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3054 res.attr_bitmask[2] = 0;
3055 break;
3056 case 1:
3057 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3058 break;
3059 case 2:
3060 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3061 }
3062 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3063 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3064 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3065 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3066 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3067 NFS_CAP_CTIME|NFS_CAP_MTIME|
3068 NFS_CAP_SECURITY_LABEL);
3069 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3070 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3071 server->caps |= NFS_CAP_ACLS;
3072 if (res.has_links != 0)
3073 server->caps |= NFS_CAP_HARDLINKS;
3074 if (res.has_symlinks != 0)
3075 server->caps |= NFS_CAP_SYMLINKS;
3076 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3077 server->caps |= NFS_CAP_FILEID;
3078 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3079 server->caps |= NFS_CAP_MODE;
3080 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3081 server->caps |= NFS_CAP_NLINK;
3082 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3083 server->caps |= NFS_CAP_OWNER;
3084 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3085 server->caps |= NFS_CAP_OWNER_GROUP;
3086 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3087 server->caps |= NFS_CAP_ATIME;
3088 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3089 server->caps |= NFS_CAP_CTIME;
3090 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3091 server->caps |= NFS_CAP_MTIME;
3092#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3093 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3094 server->caps |= NFS_CAP_SECURITY_LABEL;
3095#endif
3096 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3097 sizeof(server->attr_bitmask));
3098 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3099
3100 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3101 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3102 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3103 server->cache_consistency_bitmask[2] = 0;
3104 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3105 sizeof(server->exclcreat_bitmask));
3106 server->acl_bitmask = res.acl_bitmask;
3107 server->fh_expire_type = res.fh_expire_type;
3108 }
3109
3110 return status;
3111}
3112
3113int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3114{
3115 struct nfs4_exception exception = { };
3116 int err;
3117 do {
3118 err = nfs4_handle_exception(server,
3119 _nfs4_server_capabilities(server, fhandle),
3120 &exception);
3121 } while (exception.retry);
3122 return err;
3123}
3124
3125static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3126 struct nfs_fsinfo *info)
3127{
3128 u32 bitmask[3];
3129 struct nfs4_lookup_root_arg args = {
3130 .bitmask = bitmask,
3131 };
3132 struct nfs4_lookup_res res = {
3133 .server = server,
3134 .fattr = info->fattr,
3135 .fh = fhandle,
3136 };
3137 struct rpc_message msg = {
3138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3139 .rpc_argp = &args,
3140 .rpc_resp = &res,
3141 };
3142
3143 bitmask[0] = nfs4_fattr_bitmap[0];
3144 bitmask[1] = nfs4_fattr_bitmap[1];
3145 /*
3146 * Process the label in the upcoming getfattr
3147 */
3148 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3149
3150 nfs_fattr_init(info->fattr);
3151 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3152}
3153
3154static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3155 struct nfs_fsinfo *info)
3156{
3157 struct nfs4_exception exception = { };
3158 int err;
3159 do {
3160 err = _nfs4_lookup_root(server, fhandle, info);
3161 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3162 switch (err) {
3163 case 0:
3164 case -NFS4ERR_WRONGSEC:
3165 goto out;
3166 default:
3167 err = nfs4_handle_exception(server, err, &exception);
3168 }
3169 } while (exception.retry);
3170out:
3171 return err;
3172}
3173
3174static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3175 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3176{
3177 struct rpc_auth_create_args auth_args = {
3178 .pseudoflavor = flavor,
3179 };
3180 struct rpc_auth *auth;
3181 int ret;
3182
3183 auth = rpcauth_create(&auth_args, server->client);
3184 if (IS_ERR(auth)) {
3185 ret = -EACCES;
3186 goto out;
3187 }
3188 ret = nfs4_lookup_root(server, fhandle, info);
3189out:
3190 return ret;
3191}
3192
3193/*
3194 * Retry pseudoroot lookup with various security flavors. We do this when:
3195 *
3196 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3197 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3198 *
3199 * Returns zero on success, or a negative NFS4ERR value, or a
3200 * negative errno value.
3201 */
3202static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3203 struct nfs_fsinfo *info)
3204{
3205 /* Per 3530bis 15.33.5 */
3206 static const rpc_authflavor_t flav_array[] = {
3207 RPC_AUTH_GSS_KRB5P,
3208 RPC_AUTH_GSS_KRB5I,
3209 RPC_AUTH_GSS_KRB5,
3210 RPC_AUTH_UNIX, /* courtesy */
3211 RPC_AUTH_NULL,
3212 };
3213 int status = -EPERM;
3214 size_t i;
3215
3216 if (server->auth_info.flavor_len > 0) {
3217 /* try each flavor specified by user */
3218 for (i = 0; i < server->auth_info.flavor_len; i++) {
3219 status = nfs4_lookup_root_sec(server, fhandle, info,
3220 server->auth_info.flavors[i]);
3221 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3222 continue;
3223 break;
3224 }
3225 } else {
3226 /* no flavors specified by user, try default list */
3227 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3228 status = nfs4_lookup_root_sec(server, fhandle, info,
3229 flav_array[i]);
3230 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3231 continue;
3232 break;
3233 }
3234 }
3235
3236 /*
3237 * -EACCESS could mean that the user doesn't have correct permissions
3238 * to access the mount. It could also mean that we tried to mount
3239 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3240 * existing mount programs don't handle -EACCES very well so it should
3241 * be mapped to -EPERM instead.
3242 */
3243 if (status == -EACCES)
3244 status = -EPERM;
3245 return status;
3246}
3247
3248static int nfs4_do_find_root_sec(struct nfs_server *server,
3249 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3250{
3251 int mv = server->nfs_client->cl_minorversion;
3252 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3253}
3254
3255/**
3256 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3257 * @server: initialized nfs_server handle
3258 * @fhandle: we fill in the pseudo-fs root file handle
3259 * @info: we fill in an FSINFO struct
3260 * @auth_probe: probe the auth flavours
3261 *
3262 * Returns zero on success, or a negative errno.
3263 */
3264int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3265 struct nfs_fsinfo *info,
3266 bool auth_probe)
3267{
3268 int status = 0;
3269
3270 if (!auth_probe)
3271 status = nfs4_lookup_root(server, fhandle, info);
3272
3273 if (auth_probe || status == NFS4ERR_WRONGSEC)
3274 status = nfs4_do_find_root_sec(server, fhandle, info);
3275
3276 if (status == 0)
3277 status = nfs4_server_capabilities(server, fhandle);
3278 if (status == 0)
3279 status = nfs4_do_fsinfo(server, fhandle, info);
3280
3281 return nfs4_map_errors(status);
3282}
3283
3284static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3285 struct nfs_fsinfo *info)
3286{
3287 int error;
3288 struct nfs_fattr *fattr = info->fattr;
3289 struct nfs4_label *label = NULL;
3290
3291 error = nfs4_server_capabilities(server, mntfh);
3292 if (error < 0) {
3293 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3294 return error;
3295 }
3296
3297 label = nfs4_label_alloc(server, GFP_KERNEL);
3298 if (IS_ERR(label))
3299 return PTR_ERR(label);
3300
3301 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3302 if (error < 0) {
3303 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3304 goto err_free_label;
3305 }
3306
3307 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3308 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3309 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3310
3311err_free_label:
3312 nfs4_label_free(label);
3313
3314 return error;
3315}
3316
3317/*
3318 * Get locations and (maybe) other attributes of a referral.
3319 * Note that we'll actually follow the referral later when
3320 * we detect fsid mismatch in inode revalidation
3321 */
3322static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3323 const struct qstr *name, struct nfs_fattr *fattr,
3324 struct nfs_fh *fhandle)
3325{
3326 int status = -ENOMEM;
3327 struct page *page = NULL;
3328 struct nfs4_fs_locations *locations = NULL;
3329
3330 page = alloc_page(GFP_KERNEL);
3331 if (page == NULL)
3332 goto out;
3333 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3334 if (locations == NULL)
3335 goto out;
3336
3337 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3338 if (status != 0)
3339 goto out;
3340
3341 /*
3342 * If the fsid didn't change, this is a migration event, not a
3343 * referral. Cause us to drop into the exception handler, which
3344 * will kick off migration recovery.
3345 */
3346 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3347 dprintk("%s: server did not return a different fsid for"
3348 " a referral at %s\n", __func__, name->name);
3349 status = -NFS4ERR_MOVED;
3350 goto out;
3351 }
3352 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3353 nfs_fixup_referral_attributes(&locations->fattr);
3354
3355 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3356 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3357 memset(fhandle, 0, sizeof(struct nfs_fh));
3358out:
3359 if (page)
3360 __free_page(page);
3361 kfree(locations);
3362 return status;
3363}
3364
3365static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3366 struct nfs_fattr *fattr, struct nfs4_label *label)
3367{
3368 struct nfs4_getattr_arg args = {
3369 .fh = fhandle,
3370 .bitmask = server->attr_bitmask,
3371 };
3372 struct nfs4_getattr_res res = {
3373 .fattr = fattr,
3374 .label = label,
3375 .server = server,
3376 };
3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3379 .rpc_argp = &args,
3380 .rpc_resp = &res,
3381 };
3382
3383 args.bitmask = nfs4_bitmask(server, label);
3384
3385 nfs_fattr_init(fattr);
3386 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3387}
3388
3389static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3390 struct nfs_fattr *fattr, struct nfs4_label *label)
3391{
3392 struct nfs4_exception exception = { };
3393 int err;
3394 do {
3395 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3396 trace_nfs4_getattr(server, fhandle, fattr, err);
3397 err = nfs4_handle_exception(server, err,
3398 &exception);
3399 } while (exception.retry);
3400 return err;
3401}
3402
3403/*
3404 * The file is not closed if it is opened due to the a request to change
3405 * the size of the file. The open call will not be needed once the
3406 * VFS layer lookup-intents are implemented.
3407 *
3408 * Close is called when the inode is destroyed.
3409 * If we haven't opened the file for O_WRONLY, we
3410 * need to in the size_change case to obtain a stateid.
3411 *
3412 * Got race?
3413 * Because OPEN is always done by name in nfsv4, it is
3414 * possible that we opened a different file by the same
3415 * name. We can recognize this race condition, but we
3416 * can't do anything about it besides returning an error.
3417 *
3418 * This will be fixed with VFS changes (lookup-intent).
3419 */
3420static int
3421nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3422 struct iattr *sattr)
3423{
3424 struct inode *inode = d_inode(dentry);
3425 struct rpc_cred *cred = NULL;
3426 struct nfs4_state *state = NULL;
3427 struct nfs4_label *label = NULL;
3428 int status;
3429
3430 if (pnfs_ld_layoutret_on_setattr(inode) &&
3431 sattr->ia_valid & ATTR_SIZE &&
3432 sattr->ia_size < i_size_read(inode))
3433 pnfs_commit_and_return_layout(inode);
3434
3435 nfs_fattr_init(fattr);
3436
3437 /* Deal with open(O_TRUNC) */
3438 if (sattr->ia_valid & ATTR_OPEN)
3439 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3440
3441 /* Optimization: if the end result is no change, don't RPC */
3442 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3443 return 0;
3444
3445 /* Search for an existing open(O_WRITE) file */
3446 if (sattr->ia_valid & ATTR_FILE) {
3447 struct nfs_open_context *ctx;
3448
3449 ctx = nfs_file_open_context(sattr->ia_file);
3450 if (ctx) {
3451 cred = ctx->cred;
3452 state = ctx->state;
3453 }
3454 }
3455
3456 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3457 if (IS_ERR(label))
3458 return PTR_ERR(label);
3459
3460 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3461 if (status == 0) {
3462 nfs_setattr_update_inode(inode, sattr, fattr);
3463 nfs_setsecurity(inode, fattr, label);
3464 }
3465 nfs4_label_free(label);
3466 return status;
3467}
3468
3469static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3470 const struct qstr *name, struct nfs_fh *fhandle,
3471 struct nfs_fattr *fattr, struct nfs4_label *label)
3472{
3473 struct nfs_server *server = NFS_SERVER(dir);
3474 int status;
3475 struct nfs4_lookup_arg args = {
3476 .bitmask = server->attr_bitmask,
3477 .dir_fh = NFS_FH(dir),
3478 .name = name,
3479 };
3480 struct nfs4_lookup_res res = {
3481 .server = server,
3482 .fattr = fattr,
3483 .label = label,
3484 .fh = fhandle,
3485 };
3486 struct rpc_message msg = {
3487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3488 .rpc_argp = &args,
3489 .rpc_resp = &res,
3490 };
3491
3492 args.bitmask = nfs4_bitmask(server, label);
3493
3494 nfs_fattr_init(fattr);
3495
3496 dprintk("NFS call lookup %s\n", name->name);
3497 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3498 dprintk("NFS reply lookup: %d\n", status);
3499 return status;
3500}
3501
3502static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3503{
3504 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3505 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3506 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3507 fattr->nlink = 2;
3508}
3509
3510static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3511 struct qstr *name, struct nfs_fh *fhandle,
3512 struct nfs_fattr *fattr, struct nfs4_label *label)
3513{
3514 struct nfs4_exception exception = { };
3515 struct rpc_clnt *client = *clnt;
3516 int err;
3517 do {
3518 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3519 trace_nfs4_lookup(dir, name, err);
3520 switch (err) {
3521 case -NFS4ERR_BADNAME:
3522 err = -ENOENT;
3523 goto out;
3524 case -NFS4ERR_MOVED:
3525 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3526 if (err == -NFS4ERR_MOVED)
3527 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3528 goto out;
3529 case -NFS4ERR_WRONGSEC:
3530 err = -EPERM;
3531 if (client != *clnt)
3532 goto out;
3533 client = nfs4_negotiate_security(client, dir, name);
3534 if (IS_ERR(client))
3535 return PTR_ERR(client);
3536
3537 exception.retry = 1;
3538 break;
3539 default:
3540 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3541 }
3542 } while (exception.retry);
3543
3544out:
3545 if (err == 0)
3546 *clnt = client;
3547 else if (client != *clnt)
3548 rpc_shutdown_client(client);
3549
3550 return err;
3551}
3552
3553static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3554 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3555 struct nfs4_label *label)
3556{
3557 int status;
3558 struct rpc_clnt *client = NFS_CLIENT(dir);
3559
3560 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3561 if (client != NFS_CLIENT(dir)) {
3562 rpc_shutdown_client(client);
3563 nfs_fixup_secinfo_attributes(fattr);
3564 }
3565 return status;
3566}
3567
3568struct rpc_clnt *
3569nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3570 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3571{
3572 struct rpc_clnt *client = NFS_CLIENT(dir);
3573 int status;
3574
3575 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3576 if (status < 0)
3577 return ERR_PTR(status);
3578 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3579}
3580
3581static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3582{
3583 struct nfs_server *server = NFS_SERVER(inode);
3584 struct nfs4_accessargs args = {
3585 .fh = NFS_FH(inode),
3586 .bitmask = server->cache_consistency_bitmask,
3587 };
3588 struct nfs4_accessres res = {
3589 .server = server,
3590 };
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3593 .rpc_argp = &args,
3594 .rpc_resp = &res,
3595 .rpc_cred = entry->cred,
3596 };
3597 int mode = entry->mask;
3598 int status = 0;
3599
3600 /*
3601 * Determine which access bits we want to ask for...
3602 */
3603 if (mode & MAY_READ)
3604 args.access |= NFS4_ACCESS_READ;
3605 if (S_ISDIR(inode->i_mode)) {
3606 if (mode & MAY_WRITE)
3607 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3608 if (mode & MAY_EXEC)
3609 args.access |= NFS4_ACCESS_LOOKUP;
3610 } else {
3611 if (mode & MAY_WRITE)
3612 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3613 if (mode & MAY_EXEC)
3614 args.access |= NFS4_ACCESS_EXECUTE;
3615 }
3616
3617 res.fattr = nfs_alloc_fattr();
3618 if (res.fattr == NULL)
3619 return -ENOMEM;
3620
3621 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3622 if (!status) {
3623 nfs_access_set_mask(entry, res.access);
3624 nfs_refresh_inode(inode, res.fattr);
3625 }
3626 nfs_free_fattr(res.fattr);
3627 return status;
3628}
3629
3630static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3631{
3632 struct nfs4_exception exception = { };
3633 int err;
3634 do {
3635 err = _nfs4_proc_access(inode, entry);
3636 trace_nfs4_access(inode, err);
3637 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3638 &exception);
3639 } while (exception.retry);
3640 return err;
3641}
3642
3643/*
3644 * TODO: For the time being, we don't try to get any attributes
3645 * along with any of the zero-copy operations READ, READDIR,
3646 * READLINK, WRITE.
3647 *
3648 * In the case of the first three, we want to put the GETATTR
3649 * after the read-type operation -- this is because it is hard
3650 * to predict the length of a GETATTR response in v4, and thus
3651 * align the READ data correctly. This means that the GETATTR
3652 * may end up partially falling into the page cache, and we should
3653 * shift it into the 'tail' of the xdr_buf before processing.
3654 * To do this efficiently, we need to know the total length
3655 * of data received, which doesn't seem to be available outside
3656 * of the RPC layer.
3657 *
3658 * In the case of WRITE, we also want to put the GETATTR after
3659 * the operation -- in this case because we want to make sure
3660 * we get the post-operation mtime and size.
3661 *
3662 * Both of these changes to the XDR layer would in fact be quite
3663 * minor, but I decided to leave them for a subsequent patch.
3664 */
3665static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3666 unsigned int pgbase, unsigned int pglen)
3667{
3668 struct nfs4_readlink args = {
3669 .fh = NFS_FH(inode),
3670 .pgbase = pgbase,
3671 .pglen = pglen,
3672 .pages = &page,
3673 };
3674 struct nfs4_readlink_res res;
3675 struct rpc_message msg = {
3676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3677 .rpc_argp = &args,
3678 .rpc_resp = &res,
3679 };
3680
3681 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3682}
3683
3684static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3685 unsigned int pgbase, unsigned int pglen)
3686{
3687 struct nfs4_exception exception = { };
3688 int err;
3689 do {
3690 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3691 trace_nfs4_readlink(inode, err);
3692 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3693 &exception);
3694 } while (exception.retry);
3695 return err;
3696}
3697
3698/*
3699 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3700 */
3701static int
3702nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3703 int flags)
3704{
3705 struct nfs4_label l, *ilabel = NULL;
3706 struct nfs_open_context *ctx;
3707 struct nfs4_state *state;
3708 int status = 0;
3709
3710 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3711 if (IS_ERR(ctx))
3712 return PTR_ERR(ctx);
3713
3714 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3715
3716 sattr->ia_mode &= ~current_umask();
3717 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3718 if (IS_ERR(state)) {
3719 status = PTR_ERR(state);
3720 goto out;
3721 }
3722out:
3723 nfs4_label_release_security(ilabel);
3724 put_nfs_open_context(ctx);
3725 return status;
3726}
3727
3728static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3729{
3730 struct nfs_server *server = NFS_SERVER(dir);
3731 struct nfs_removeargs args = {
3732 .fh = NFS_FH(dir),
3733 .name = *name,
3734 };
3735 struct nfs_removeres res = {
3736 .server = server,
3737 };
3738 struct rpc_message msg = {
3739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3740 .rpc_argp = &args,
3741 .rpc_resp = &res,
3742 };
3743 int status;
3744
3745 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3746 if (status == 0)
3747 update_changeattr(dir, &res.cinfo);
3748 return status;
3749}
3750
3751static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3752{
3753 struct nfs4_exception exception = { };
3754 int err;
3755 do {
3756 err = _nfs4_proc_remove(dir, name);
3757 trace_nfs4_remove(dir, name, err);
3758 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3759 &exception);
3760 } while (exception.retry);
3761 return err;
3762}
3763
3764static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3765{
3766 struct nfs_server *server = NFS_SERVER(dir);
3767 struct nfs_removeargs *args = msg->rpc_argp;
3768 struct nfs_removeres *res = msg->rpc_resp;
3769
3770 res->server = server;
3771 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3772 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3773
3774 nfs_fattr_init(res->dir_attr);
3775}
3776
3777static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3778{
3779 nfs4_setup_sequence(NFS_SERVER(data->dir),
3780 &data->args.seq_args,
3781 &data->res.seq_res,
3782 task);
3783}
3784
3785static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3786{
3787 struct nfs_unlinkdata *data = task->tk_calldata;
3788 struct nfs_removeres *res = &data->res;
3789
3790 if (!nfs4_sequence_done(task, &res->seq_res))
3791 return 0;
3792 if (nfs4_async_handle_error(task, res->server, NULL,
3793 &data->timeout) == -EAGAIN)
3794 return 0;
3795 update_changeattr(dir, &res->cinfo);
3796 return 1;
3797}
3798
3799static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3800{
3801 struct nfs_server *server = NFS_SERVER(dir);
3802 struct nfs_renameargs *arg = msg->rpc_argp;
3803 struct nfs_renameres *res = msg->rpc_resp;
3804
3805 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3806 res->server = server;
3807 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3808}
3809
3810static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3811{
3812 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3813 &data->args.seq_args,
3814 &data->res.seq_res,
3815 task);
3816}
3817
3818static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3819 struct inode *new_dir)
3820{
3821 struct nfs_renamedata *data = task->tk_calldata;
3822 struct nfs_renameres *res = &data->res;
3823
3824 if (!nfs4_sequence_done(task, &res->seq_res))
3825 return 0;
3826 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3827 return 0;
3828
3829 update_changeattr(old_dir, &res->old_cinfo);
3830 update_changeattr(new_dir, &res->new_cinfo);
3831 return 1;
3832}
3833
3834static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3835{
3836 struct nfs_server *server = NFS_SERVER(inode);
3837 struct nfs4_link_arg arg = {
3838 .fh = NFS_FH(inode),
3839 .dir_fh = NFS_FH(dir),
3840 .name = name,
3841 .bitmask = server->attr_bitmask,
3842 };
3843 struct nfs4_link_res res = {
3844 .server = server,
3845 .label = NULL,
3846 };
3847 struct rpc_message msg = {
3848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3849 .rpc_argp = &arg,
3850 .rpc_resp = &res,
3851 };
3852 int status = -ENOMEM;
3853
3854 res.fattr = nfs_alloc_fattr();
3855 if (res.fattr == NULL)
3856 goto out;
3857
3858 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3859 if (IS_ERR(res.label)) {
3860 status = PTR_ERR(res.label);
3861 goto out;
3862 }
3863 arg.bitmask = nfs4_bitmask(server, res.label);
3864
3865 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3866 if (!status) {
3867 update_changeattr(dir, &res.cinfo);
3868 status = nfs_post_op_update_inode(inode, res.fattr);
3869 if (!status)
3870 nfs_setsecurity(inode, res.fattr, res.label);
3871 }
3872
3873
3874 nfs4_label_free(res.label);
3875
3876out:
3877 nfs_free_fattr(res.fattr);
3878 return status;
3879}
3880
3881static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3882{
3883 struct nfs4_exception exception = { };
3884 int err;
3885 do {
3886 err = nfs4_handle_exception(NFS_SERVER(inode),
3887 _nfs4_proc_link(inode, dir, name),
3888 &exception);
3889 } while (exception.retry);
3890 return err;
3891}
3892
3893struct nfs4_createdata {
3894 struct rpc_message msg;
3895 struct nfs4_create_arg arg;
3896 struct nfs4_create_res res;
3897 struct nfs_fh fh;
3898 struct nfs_fattr fattr;
3899 struct nfs4_label *label;
3900};
3901
3902static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3903 struct qstr *name, struct iattr *sattr, u32 ftype)
3904{
3905 struct nfs4_createdata *data;
3906
3907 data = kzalloc(sizeof(*data), GFP_KERNEL);
3908 if (data != NULL) {
3909 struct nfs_server *server = NFS_SERVER(dir);
3910
3911 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3912 if (IS_ERR(data->label))
3913 goto out_free;
3914
3915 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3916 data->msg.rpc_argp = &data->arg;
3917 data->msg.rpc_resp = &data->res;
3918 data->arg.dir_fh = NFS_FH(dir);
3919 data->arg.server = server;
3920 data->arg.name = name;
3921 data->arg.attrs = sattr;
3922 data->arg.ftype = ftype;
3923 data->arg.bitmask = nfs4_bitmask(server, data->label);
3924 data->res.server = server;
3925 data->res.fh = &data->fh;
3926 data->res.fattr = &data->fattr;
3927 data->res.label = data->label;
3928 nfs_fattr_init(data->res.fattr);
3929 }
3930 return data;
3931out_free:
3932 kfree(data);
3933 return NULL;
3934}
3935
3936static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3937{
3938 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3939 &data->arg.seq_args, &data->res.seq_res, 1);
3940 if (status == 0) {
3941 update_changeattr(dir, &data->res.dir_cinfo);
3942 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3943 }
3944 return status;
3945}
3946
3947static void nfs4_free_createdata(struct nfs4_createdata *data)
3948{
3949 nfs4_label_free(data->label);
3950 kfree(data);
3951}
3952
3953static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3954 struct page *page, unsigned int len, struct iattr *sattr,
3955 struct nfs4_label *label)
3956{
3957 struct nfs4_createdata *data;
3958 int status = -ENAMETOOLONG;
3959
3960 if (len > NFS4_MAXPATHLEN)
3961 goto out;
3962
3963 status = -ENOMEM;
3964 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3965 if (data == NULL)
3966 goto out;
3967
3968 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3969 data->arg.u.symlink.pages = &page;
3970 data->arg.u.symlink.len = len;
3971 data->arg.label = label;
3972
3973 status = nfs4_do_create(dir, dentry, data);
3974
3975 nfs4_free_createdata(data);
3976out:
3977 return status;
3978}
3979
3980static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3981 struct page *page, unsigned int len, struct iattr *sattr)
3982{
3983 struct nfs4_exception exception = { };
3984 struct nfs4_label l, *label = NULL;
3985 int err;
3986
3987 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3988
3989 do {
3990 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3991 trace_nfs4_symlink(dir, &dentry->d_name, err);
3992 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3993 &exception);
3994 } while (exception.retry);
3995
3996 nfs4_label_release_security(label);
3997 return err;
3998}
3999
4000static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4001 struct iattr *sattr, struct nfs4_label *label)
4002{
4003 struct nfs4_createdata *data;
4004 int status = -ENOMEM;
4005
4006 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4007 if (data == NULL)
4008 goto out;
4009
4010 data->arg.label = label;
4011 status = nfs4_do_create(dir, dentry, data);
4012
4013 nfs4_free_createdata(data);
4014out:
4015 return status;
4016}
4017
4018static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4019 struct iattr *sattr)
4020{
4021 struct nfs4_exception exception = { };
4022 struct nfs4_label l, *label = NULL;
4023 int err;
4024
4025 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4026
4027 sattr->ia_mode &= ~current_umask();
4028 do {
4029 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4030 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4031 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4032 &exception);
4033 } while (exception.retry);
4034 nfs4_label_release_security(label);
4035
4036 return err;
4037}
4038
4039static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4040 u64 cookie, struct page **pages, unsigned int count, int plus)
4041{
4042 struct inode *dir = d_inode(dentry);
4043 struct nfs4_readdir_arg args = {
4044 .fh = NFS_FH(dir),
4045 .pages = pages,
4046 .pgbase = 0,
4047 .count = count,
4048 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4049 .plus = plus,
4050 };
4051 struct nfs4_readdir_res res;
4052 struct rpc_message msg = {
4053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4054 .rpc_argp = &args,
4055 .rpc_resp = &res,
4056 .rpc_cred = cred,
4057 };
4058 int status;
4059
4060 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4061 dentry,
4062 (unsigned long long)cookie);
4063 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4064 res.pgbase = args.pgbase;
4065 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4066 if (status >= 0) {
4067 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4068 status += args.pgbase;
4069 }
4070
4071 nfs_invalidate_atime(dir);
4072
4073 dprintk("%s: returns %d\n", __func__, status);
4074 return status;
4075}
4076
4077static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4078 u64 cookie, struct page **pages, unsigned int count, int plus)
4079{
4080 struct nfs4_exception exception = { };
4081 int err;
4082 do {
4083 err = _nfs4_proc_readdir(dentry, cred, cookie,
4084 pages, count, plus);
4085 trace_nfs4_readdir(d_inode(dentry), err);
4086 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4087 &exception);
4088 } while (exception.retry);
4089 return err;
4090}
4091
4092static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4093 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4094{
4095 struct nfs4_createdata *data;
4096 int mode = sattr->ia_mode;
4097 int status = -ENOMEM;
4098
4099 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4100 if (data == NULL)
4101 goto out;
4102
4103 if (S_ISFIFO(mode))
4104 data->arg.ftype = NF4FIFO;
4105 else if (S_ISBLK(mode)) {
4106 data->arg.ftype = NF4BLK;
4107 data->arg.u.device.specdata1 = MAJOR(rdev);
4108 data->arg.u.device.specdata2 = MINOR(rdev);
4109 }
4110 else if (S_ISCHR(mode)) {
4111 data->arg.ftype = NF4CHR;
4112 data->arg.u.device.specdata1 = MAJOR(rdev);
4113 data->arg.u.device.specdata2 = MINOR(rdev);
4114 } else if (!S_ISSOCK(mode)) {
4115 status = -EINVAL;
4116 goto out_free;
4117 }
4118
4119 data->arg.label = label;
4120 status = nfs4_do_create(dir, dentry, data);
4121out_free:
4122 nfs4_free_createdata(data);
4123out:
4124 return status;
4125}
4126
4127static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4128 struct iattr *sattr, dev_t rdev)
4129{
4130 struct nfs4_exception exception = { };
4131 struct nfs4_label l, *label = NULL;
4132 int err;
4133
4134 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4135
4136 sattr->ia_mode &= ~current_umask();
4137 do {
4138 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4139 trace_nfs4_mknod(dir, &dentry->d_name, err);
4140 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4141 &exception);
4142 } while (exception.retry);
4143
4144 nfs4_label_release_security(label);
4145
4146 return err;
4147}
4148
4149static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4150 struct nfs_fsstat *fsstat)
4151{
4152 struct nfs4_statfs_arg args = {
4153 .fh = fhandle,
4154 .bitmask = server->attr_bitmask,
4155 };
4156 struct nfs4_statfs_res res = {
4157 .fsstat = fsstat,
4158 };
4159 struct rpc_message msg = {
4160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4161 .rpc_argp = &args,
4162 .rpc_resp = &res,
4163 };
4164
4165 nfs_fattr_init(fsstat->fattr);
4166 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4167}
4168
4169static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4170{
4171 struct nfs4_exception exception = { };
4172 int err;
4173 do {
4174 err = nfs4_handle_exception(server,
4175 _nfs4_proc_statfs(server, fhandle, fsstat),
4176 &exception);
4177 } while (exception.retry);
4178 return err;
4179}
4180
4181static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4182 struct nfs_fsinfo *fsinfo)
4183{
4184 struct nfs4_fsinfo_arg args = {
4185 .fh = fhandle,
4186 .bitmask = server->attr_bitmask,
4187 };
4188 struct nfs4_fsinfo_res res = {
4189 .fsinfo = fsinfo,
4190 };
4191 struct rpc_message msg = {
4192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4193 .rpc_argp = &args,
4194 .rpc_resp = &res,
4195 };
4196
4197 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4198}
4199
4200static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4201{
4202 struct nfs4_exception exception = { };
4203 unsigned long now = jiffies;
4204 int err;
4205
4206 do {
4207 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4208 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4209 if (err == 0) {
4210 struct nfs_client *clp = server->nfs_client;
4211
4212 spin_lock(&clp->cl_lock);
4213 clp->cl_lease_time = fsinfo->lease_time * HZ;
4214 clp->cl_last_renewal = now;
4215 spin_unlock(&clp->cl_lock);
4216 break;
4217 }
4218 err = nfs4_handle_exception(server, err, &exception);
4219 } while (exception.retry);
4220 return err;
4221}
4222
4223static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4224{
4225 int error;
4226
4227 nfs_fattr_init(fsinfo->fattr);
4228 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4229 if (error == 0) {
4230 /* block layout checks this! */
4231 server->pnfs_blksize = fsinfo->blksize;
4232 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4233 }
4234
4235 return error;
4236}
4237
4238static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4239 struct nfs_pathconf *pathconf)
4240{
4241 struct nfs4_pathconf_arg args = {
4242 .fh = fhandle,
4243 .bitmask = server->attr_bitmask,
4244 };
4245 struct nfs4_pathconf_res res = {
4246 .pathconf = pathconf,
4247 };
4248 struct rpc_message msg = {
4249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4250 .rpc_argp = &args,
4251 .rpc_resp = &res,
4252 };
4253
4254 /* None of the pathconf attributes are mandatory to implement */
4255 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4256 memset(pathconf, 0, sizeof(*pathconf));
4257 return 0;
4258 }
4259
4260 nfs_fattr_init(pathconf->fattr);
4261 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4262}
4263
4264static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4265 struct nfs_pathconf *pathconf)
4266{
4267 struct nfs4_exception exception = { };
4268 int err;
4269
4270 do {
4271 err = nfs4_handle_exception(server,
4272 _nfs4_proc_pathconf(server, fhandle, pathconf),
4273 &exception);
4274 } while (exception.retry);
4275 return err;
4276}
4277
4278int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4279 const struct nfs_open_context *ctx,
4280 const struct nfs_lock_context *l_ctx,
4281 fmode_t fmode)
4282{
4283 const struct nfs_lockowner *lockowner = NULL;
4284
4285 if (l_ctx != NULL)
4286 lockowner = &l_ctx->lockowner;
4287 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4288}
4289EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4290
4291static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4292 const struct nfs_open_context *ctx,
4293 const struct nfs_lock_context *l_ctx,
4294 fmode_t fmode)
4295{
4296 nfs4_stateid current_stateid;
4297
4298 /* If the current stateid represents a lost lock, then exit */
4299 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4300 return true;
4301 return nfs4_stateid_match(stateid, &current_stateid);
4302}
4303
4304static bool nfs4_error_stateid_expired(int err)
4305{
4306 switch (err) {
4307 case -NFS4ERR_DELEG_REVOKED:
4308 case -NFS4ERR_ADMIN_REVOKED:
4309 case -NFS4ERR_BAD_STATEID:
4310 case -NFS4ERR_STALE_STATEID:
4311 case -NFS4ERR_OLD_STATEID:
4312 case -NFS4ERR_OPENMODE:
4313 case -NFS4ERR_EXPIRED:
4314 return true;
4315 }
4316 return false;
4317}
4318
4319void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4320{
4321 nfs_invalidate_atime(hdr->inode);
4322}
4323
4324static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4325{
4326 struct nfs_server *server = NFS_SERVER(hdr->inode);
4327
4328 trace_nfs4_read(hdr, task->tk_status);
4329 if (nfs4_async_handle_error(task, server,
4330 hdr->args.context->state,
4331 NULL) == -EAGAIN) {
4332 rpc_restart_call_prepare(task);
4333 return -EAGAIN;
4334 }
4335
4336 __nfs4_read_done_cb(hdr);
4337 if (task->tk_status > 0)
4338 renew_lease(server, hdr->timestamp);
4339 return 0;
4340}
4341
4342static bool nfs4_read_stateid_changed(struct rpc_task *task,
4343 struct nfs_pgio_args *args)
4344{
4345
4346 if (!nfs4_error_stateid_expired(task->tk_status) ||
4347 nfs4_stateid_is_current(&args->stateid,
4348 args->context,
4349 args->lock_context,
4350 FMODE_READ))
4351 return false;
4352 rpc_restart_call_prepare(task);
4353 return true;
4354}
4355
4356static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4357{
4358
4359 dprintk("--> %s\n", __func__);
4360
4361 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4362 return -EAGAIN;
4363 if (nfs4_read_stateid_changed(task, &hdr->args))
4364 return -EAGAIN;
4365 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4366 nfs4_read_done_cb(task, hdr);
4367}
4368
4369static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4370 struct rpc_message *msg)
4371{
4372 hdr->timestamp = jiffies;
4373 hdr->pgio_done_cb = nfs4_read_done_cb;
4374 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4375 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4376}
4377
4378static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4379 struct nfs_pgio_header *hdr)
4380{
4381 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4382 &hdr->args.seq_args,
4383 &hdr->res.seq_res,
4384 task))
4385 return 0;
4386 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4387 hdr->args.lock_context,
4388 hdr->rw_ops->rw_mode) == -EIO)
4389 return -EIO;
4390 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4391 return -EIO;
4392 return 0;
4393}
4394
4395static int nfs4_write_done_cb(struct rpc_task *task,
4396 struct nfs_pgio_header *hdr)
4397{
4398 struct inode *inode = hdr->inode;
4399
4400 trace_nfs4_write(hdr, task->tk_status);
4401 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4402 hdr->args.context->state,
4403 NULL) == -EAGAIN) {
4404 rpc_restart_call_prepare(task);
4405 return -EAGAIN;
4406 }
4407 if (task->tk_status >= 0) {
4408 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4409 nfs_writeback_update_inode(hdr);
4410 }
4411 return 0;
4412}
4413
4414static bool nfs4_write_stateid_changed(struct rpc_task *task,
4415 struct nfs_pgio_args *args)
4416{
4417
4418 if (!nfs4_error_stateid_expired(task->tk_status) ||
4419 nfs4_stateid_is_current(&args->stateid,
4420 args->context,
4421 args->lock_context,
4422 FMODE_WRITE))
4423 return false;
4424 rpc_restart_call_prepare(task);
4425 return true;
4426}
4427
4428static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4429{
4430 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4431 return -EAGAIN;
4432 if (nfs4_write_stateid_changed(task, &hdr->args))
4433 return -EAGAIN;
4434 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4435 nfs4_write_done_cb(task, hdr);
4436}
4437
4438static
4439bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4440{
4441 /* Don't request attributes for pNFS or O_DIRECT writes */
4442 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4443 return false;
4444 /* Otherwise, request attributes if and only if we don't hold
4445 * a delegation
4446 */
4447 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4448}
4449
4450static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4451 struct rpc_message *msg)
4452{
4453 struct nfs_server *server = NFS_SERVER(hdr->inode);
4454
4455 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4456 hdr->args.bitmask = NULL;
4457 hdr->res.fattr = NULL;
4458 } else
4459 hdr->args.bitmask = server->cache_consistency_bitmask;
4460
4461 if (!hdr->pgio_done_cb)
4462 hdr->pgio_done_cb = nfs4_write_done_cb;
4463 hdr->res.server = server;
4464 hdr->timestamp = jiffies;
4465
4466 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4467 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4468}
4469
4470static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4471{
4472 nfs4_setup_sequence(NFS_SERVER(data->inode),
4473 &data->args.seq_args,
4474 &data->res.seq_res,
4475 task);
4476}
4477
4478static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4479{
4480 struct inode *inode = data->inode;
4481
4482 trace_nfs4_commit(data, task->tk_status);
4483 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4484 NULL, NULL) == -EAGAIN) {
4485 rpc_restart_call_prepare(task);
4486 return -EAGAIN;
4487 }
4488 return 0;
4489}
4490
4491static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4492{
4493 if (!nfs4_sequence_done(task, &data->res.seq_res))
4494 return -EAGAIN;
4495 return data->commit_done_cb(task, data);
4496}
4497
4498static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4499{
4500 struct nfs_server *server = NFS_SERVER(data->inode);
4501
4502 if (data->commit_done_cb == NULL)
4503 data->commit_done_cb = nfs4_commit_done_cb;
4504 data->res.server = server;
4505 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4506 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4507}
4508
4509struct nfs4_renewdata {
4510 struct nfs_client *client;
4511 unsigned long timestamp;
4512};
4513
4514/*
4515 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4516 * standalone procedure for queueing an asynchronous RENEW.
4517 */
4518static void nfs4_renew_release(void *calldata)
4519{
4520 struct nfs4_renewdata *data = calldata;
4521 struct nfs_client *clp = data->client;
4522
4523 if (atomic_read(&clp->cl_count) > 1)
4524 nfs4_schedule_state_renewal(clp);
4525 nfs_put_client(clp);
4526 kfree(data);
4527}
4528
4529static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4530{
4531 struct nfs4_renewdata *data = calldata;
4532 struct nfs_client *clp = data->client;
4533 unsigned long timestamp = data->timestamp;
4534
4535 trace_nfs4_renew_async(clp, task->tk_status);
4536 switch (task->tk_status) {
4537 case 0:
4538 break;
4539 case -NFS4ERR_LEASE_MOVED:
4540 nfs4_schedule_lease_moved_recovery(clp);
4541 break;
4542 default:
4543 /* Unless we're shutting down, schedule state recovery! */
4544 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4545 return;
4546 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4547 nfs4_schedule_lease_recovery(clp);
4548 return;
4549 }
4550 nfs4_schedule_path_down_recovery(clp);
4551 }
4552 do_renew_lease(clp, timestamp);
4553}
4554
4555static const struct rpc_call_ops nfs4_renew_ops = {
4556 .rpc_call_done = nfs4_renew_done,
4557 .rpc_release = nfs4_renew_release,
4558};
4559
4560static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4561{
4562 struct rpc_message msg = {
4563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4564 .rpc_argp = clp,
4565 .rpc_cred = cred,
4566 };
4567 struct nfs4_renewdata *data;
4568
4569 if (renew_flags == 0)
4570 return 0;
4571 if (!atomic_inc_not_zero(&clp->cl_count))
4572 return -EIO;
4573 data = kmalloc(sizeof(*data), GFP_NOFS);
4574 if (data == NULL)
4575 return -ENOMEM;
4576 data->client = clp;
4577 data->timestamp = jiffies;
4578 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4579 &nfs4_renew_ops, data);
4580}
4581
4582static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4583{
4584 struct rpc_message msg = {
4585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4586 .rpc_argp = clp,
4587 .rpc_cred = cred,
4588 };
4589 unsigned long now = jiffies;
4590 int status;
4591
4592 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4593 if (status < 0)
4594 return status;
4595 do_renew_lease(clp, now);
4596 return 0;
4597}
4598
4599static inline int nfs4_server_supports_acls(struct nfs_server *server)
4600{
4601 return server->caps & NFS_CAP_ACLS;
4602}
4603
4604/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4605 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4606 * the stack.
4607 */
4608#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4609
4610static int buf_to_pages_noslab(const void *buf, size_t buflen,
4611 struct page **pages)
4612{
4613 struct page *newpage, **spages;
4614 int rc = 0;
4615 size_t len;
4616 spages = pages;
4617
4618 do {
4619 len = min_t(size_t, PAGE_SIZE, buflen);
4620 newpage = alloc_page(GFP_KERNEL);
4621
4622 if (newpage == NULL)
4623 goto unwind;
4624 memcpy(page_address(newpage), buf, len);
4625 buf += len;
4626 buflen -= len;
4627 *pages++ = newpage;
4628 rc++;
4629 } while (buflen != 0);
4630
4631 return rc;
4632
4633unwind:
4634 for(; rc > 0; rc--)
4635 __free_page(spages[rc-1]);
4636 return -ENOMEM;
4637}
4638
4639struct nfs4_cached_acl {
4640 int cached;
4641 size_t len;
4642 char data[0];
4643};
4644
4645static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4646{
4647 struct nfs_inode *nfsi = NFS_I(inode);
4648
4649 spin_lock(&inode->i_lock);
4650 kfree(nfsi->nfs4_acl);
4651 nfsi->nfs4_acl = acl;
4652 spin_unlock(&inode->i_lock);
4653}
4654
4655static void nfs4_zap_acl_attr(struct inode *inode)
4656{
4657 nfs4_set_cached_acl(inode, NULL);
4658}
4659
4660static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4661{
4662 struct nfs_inode *nfsi = NFS_I(inode);
4663 struct nfs4_cached_acl *acl;
4664 int ret = -ENOENT;
4665
4666 spin_lock(&inode->i_lock);
4667 acl = nfsi->nfs4_acl;
4668 if (acl == NULL)
4669 goto out;
4670 if (buf == NULL) /* user is just asking for length */
4671 goto out_len;
4672 if (acl->cached == 0)
4673 goto out;
4674 ret = -ERANGE; /* see getxattr(2) man page */
4675 if (acl->len > buflen)
4676 goto out;
4677 memcpy(buf, acl->data, acl->len);
4678out_len:
4679 ret = acl->len;
4680out:
4681 spin_unlock(&inode->i_lock);
4682 return ret;
4683}
4684
4685static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4686{
4687 struct nfs4_cached_acl *acl;
4688 size_t buflen = sizeof(*acl) + acl_len;
4689
4690 if (buflen <= PAGE_SIZE) {
4691 acl = kmalloc(buflen, GFP_KERNEL);
4692 if (acl == NULL)
4693 goto out;
4694 acl->cached = 1;
4695 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4696 } else {
4697 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4698 if (acl == NULL)
4699 goto out;
4700 acl->cached = 0;
4701 }
4702 acl->len = acl_len;
4703out:
4704 nfs4_set_cached_acl(inode, acl);
4705}
4706
4707/*
4708 * The getxattr API returns the required buffer length when called with a
4709 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4710 * the required buf. On a NULL buf, we send a page of data to the server
4711 * guessing that the ACL request can be serviced by a page. If so, we cache
4712 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4713 * the cache. If not so, we throw away the page, and cache the required
4714 * length. The next getxattr call will then produce another round trip to
4715 * the server, this time with the input buf of the required size.
4716 */
4717static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4718{
4719 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4720 struct nfs_getaclargs args = {
4721 .fh = NFS_FH(inode),
4722 .acl_pages = pages,
4723 .acl_len = buflen,
4724 };
4725 struct nfs_getaclres res = {
4726 .acl_len = buflen,
4727 };
4728 struct rpc_message msg = {
4729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4730 .rpc_argp = &args,
4731 .rpc_resp = &res,
4732 };
4733 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4734 int ret = -ENOMEM, i;
4735
4736 /* As long as we're doing a round trip to the server anyway,
4737 * let's be prepared for a page of acl data. */
4738 if (npages == 0)
4739 npages = 1;
4740 if (npages > ARRAY_SIZE(pages))
4741 return -ERANGE;
4742
4743 for (i = 0; i < npages; i++) {
4744 pages[i] = alloc_page(GFP_KERNEL);
4745 if (!pages[i])
4746 goto out_free;
4747 }
4748
4749 /* for decoding across pages */
4750 res.acl_scratch = alloc_page(GFP_KERNEL);
4751 if (!res.acl_scratch)
4752 goto out_free;
4753
4754 args.acl_len = npages * PAGE_SIZE;
4755
4756 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4757 __func__, buf, buflen, npages, args.acl_len);
4758 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4759 &msg, &args.seq_args, &res.seq_res, 0);
4760 if (ret)
4761 goto out_free;
4762
4763 /* Handle the case where the passed-in buffer is too short */
4764 if (res.acl_flags & NFS4_ACL_TRUNC) {
4765 /* Did the user only issue a request for the acl length? */
4766 if (buf == NULL)
4767 goto out_ok;
4768 ret = -ERANGE;
4769 goto out_free;
4770 }
4771 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4772 if (buf) {
4773 if (res.acl_len > buflen) {
4774 ret = -ERANGE;
4775 goto out_free;
4776 }
4777 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4778 }
4779out_ok:
4780 ret = res.acl_len;
4781out_free:
4782 for (i = 0; i < npages; i++)
4783 if (pages[i])
4784 __free_page(pages[i]);
4785 if (res.acl_scratch)
4786 __free_page(res.acl_scratch);
4787 return ret;
4788}
4789
4790static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4791{
4792 struct nfs4_exception exception = { };
4793 ssize_t ret;
4794 do {
4795 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4796 trace_nfs4_get_acl(inode, ret);
4797 if (ret >= 0)
4798 break;
4799 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4800 } while (exception.retry);
4801 return ret;
4802}
4803
4804static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4805{
4806 struct nfs_server *server = NFS_SERVER(inode);
4807 int ret;
4808
4809 if (!nfs4_server_supports_acls(server))
4810 return -EOPNOTSUPP;
4811 ret = nfs_revalidate_inode(server, inode);
4812 if (ret < 0)
4813 return ret;
4814 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4815 nfs_zap_acl_cache(inode);
4816 ret = nfs4_read_cached_acl(inode, buf, buflen);
4817 if (ret != -ENOENT)
4818 /* -ENOENT is returned if there is no ACL or if there is an ACL
4819 * but no cached acl data, just the acl length */
4820 return ret;
4821 return nfs4_get_acl_uncached(inode, buf, buflen);
4822}
4823
4824static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4825{
4826 struct nfs_server *server = NFS_SERVER(inode);
4827 struct page *pages[NFS4ACL_MAXPAGES];
4828 struct nfs_setaclargs arg = {
4829 .fh = NFS_FH(inode),
4830 .acl_pages = pages,
4831 .acl_len = buflen,
4832 };
4833 struct nfs_setaclres res;
4834 struct rpc_message msg = {
4835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4836 .rpc_argp = &arg,
4837 .rpc_resp = &res,
4838 };
4839 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4840 int ret, i;
4841
4842 if (!nfs4_server_supports_acls(server))
4843 return -EOPNOTSUPP;
4844 if (npages > ARRAY_SIZE(pages))
4845 return -ERANGE;
4846 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
4847 if (i < 0)
4848 return i;
4849 nfs4_inode_return_delegation(inode);
4850 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4851
4852 /*
4853 * Free each page after tx, so the only ref left is
4854 * held by the network stack
4855 */
4856 for (; i > 0; i--)
4857 put_page(pages[i-1]);
4858
4859 /*
4860 * Acl update can result in inode attribute update.
4861 * so mark the attribute cache invalid.
4862 */
4863 spin_lock(&inode->i_lock);
4864 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4865 spin_unlock(&inode->i_lock);
4866 nfs_access_zap_cache(inode);
4867 nfs_zap_acl_cache(inode);
4868 return ret;
4869}
4870
4871static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4872{
4873 struct nfs4_exception exception = { };
4874 int err;
4875 do {
4876 err = __nfs4_proc_set_acl(inode, buf, buflen);
4877 trace_nfs4_set_acl(inode, err);
4878 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4879 &exception);
4880 } while (exception.retry);
4881 return err;
4882}
4883
4884#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4885static int _nfs4_get_security_label(struct inode *inode, void *buf,
4886 size_t buflen)
4887{
4888 struct nfs_server *server = NFS_SERVER(inode);
4889 struct nfs_fattr fattr;
4890 struct nfs4_label label = {0, 0, buflen, buf};
4891
4892 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4893 struct nfs4_getattr_arg arg = {
4894 .fh = NFS_FH(inode),
4895 .bitmask = bitmask,
4896 };
4897 struct nfs4_getattr_res res = {
4898 .fattr = &fattr,
4899 .label = &label,
4900 .server = server,
4901 };
4902 struct rpc_message msg = {
4903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4904 .rpc_argp = &arg,
4905 .rpc_resp = &res,
4906 };
4907 int ret;
4908
4909 nfs_fattr_init(&fattr);
4910
4911 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4912 if (ret)
4913 return ret;
4914 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4915 return -ENOENT;
4916 if (buflen < label.len)
4917 return -ERANGE;
4918 return 0;
4919}
4920
4921static int nfs4_get_security_label(struct inode *inode, void *buf,
4922 size_t buflen)
4923{
4924 struct nfs4_exception exception = { };
4925 int err;
4926
4927 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4928 return -EOPNOTSUPP;
4929
4930 do {
4931 err = _nfs4_get_security_label(inode, buf, buflen);
4932 trace_nfs4_get_security_label(inode, err);
4933 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4934 &exception);
4935 } while (exception.retry);
4936 return err;
4937}
4938
4939static int _nfs4_do_set_security_label(struct inode *inode,
4940 struct nfs4_label *ilabel,
4941 struct nfs_fattr *fattr,
4942 struct nfs4_label *olabel)
4943{
4944
4945 struct iattr sattr = {0};
4946 struct nfs_server *server = NFS_SERVER(inode);
4947 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4948 struct nfs_setattrargs arg = {
4949 .fh = NFS_FH(inode),
4950 .iap = &sattr,
4951 .server = server,
4952 .bitmask = bitmask,
4953 .label = ilabel,
4954 };
4955 struct nfs_setattrres res = {
4956 .fattr = fattr,
4957 .label = olabel,
4958 .server = server,
4959 };
4960 struct rpc_message msg = {
4961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4962 .rpc_argp = &arg,
4963 .rpc_resp = &res,
4964 };
4965 int status;
4966
4967 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4968
4969 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4970 if (status)
4971 dprintk("%s failed: %d\n", __func__, status);
4972
4973 return status;
4974}
4975
4976static int nfs4_do_set_security_label(struct inode *inode,
4977 struct nfs4_label *ilabel,
4978 struct nfs_fattr *fattr,
4979 struct nfs4_label *olabel)
4980{
4981 struct nfs4_exception exception = { };
4982 int err;
4983
4984 do {
4985 err = _nfs4_do_set_security_label(inode, ilabel,
4986 fattr, olabel);
4987 trace_nfs4_set_security_label(inode, err);
4988 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4989 &exception);
4990 } while (exception.retry);
4991 return err;
4992}
4993
4994static int
4995nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4996{
4997 struct nfs4_label ilabel, *olabel = NULL;
4998 struct nfs_fattr fattr;
4999 struct rpc_cred *cred;
5000 struct inode *inode = d_inode(dentry);
5001 int status;
5002
5003 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5004 return -EOPNOTSUPP;
5005
5006 nfs_fattr_init(&fattr);
5007
5008 ilabel.pi = 0;
5009 ilabel.lfs = 0;
5010 ilabel.label = (char *)buf;
5011 ilabel.len = buflen;
5012
5013 cred = rpc_lookup_cred();
5014 if (IS_ERR(cred))
5015 return PTR_ERR(cred);
5016
5017 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5018 if (IS_ERR(olabel)) {
5019 status = -PTR_ERR(olabel);
5020 goto out;
5021 }
5022
5023 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5024 if (status == 0)
5025 nfs_setsecurity(inode, &fattr, olabel);
5026
5027 nfs4_label_free(olabel);
5028out:
5029 put_rpccred(cred);
5030 return status;
5031}
5032#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5033
5034
5035static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5036 nfs4_verifier *bootverf)
5037{
5038 __be32 verf[2];
5039
5040 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5041 /* An impossible timestamp guarantees this value
5042 * will never match a generated boot time. */
5043 verf[0] = 0;
5044 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
5045 } else {
5046 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5047 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5048 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
5049 }
5050 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5051}
5052
5053static int
5054nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5055{
5056 size_t len;
5057 char *str;
5058
5059 if (clp->cl_owner_id != NULL)
5060 return 0;
5061
5062 rcu_read_lock();
5063 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5064 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5065 1 +
5066 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5067 1;
5068 rcu_read_unlock();
5069
5070 if (len > NFS4_OPAQUE_LIMIT + 1)
5071 return -EINVAL;
5072
5073 /*
5074 * Since this string is allocated at mount time, and held until the
5075 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5076 * about a memory-reclaim deadlock.
5077 */
5078 str = kmalloc(len, GFP_KERNEL);
5079 if (!str)
5080 return -ENOMEM;
5081
5082 rcu_read_lock();
5083 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5084 clp->cl_ipaddr,
5085 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5086 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5087 rcu_read_unlock();
5088
5089 clp->cl_owner_id = str;
5090 return 0;
5091}
5092
5093static int
5094nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5095{
5096 size_t len;
5097 char *str;
5098
5099 len = 10 + 10 + 1 + 10 + 1 +
5100 strlen(nfs4_client_id_uniquifier) + 1 +
5101 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5102
5103 if (len > NFS4_OPAQUE_LIMIT + 1)
5104 return -EINVAL;
5105
5106 /*
5107 * Since this string is allocated at mount time, and held until the
5108 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5109 * about a memory-reclaim deadlock.
5110 */
5111 str = kmalloc(len, GFP_KERNEL);
5112 if (!str)
5113 return -ENOMEM;
5114
5115 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5116 clp->rpc_ops->version, clp->cl_minorversion,
5117 nfs4_client_id_uniquifier,
5118 clp->cl_rpcclient->cl_nodename);
5119 clp->cl_owner_id = str;
5120 return 0;
5121}
5122
5123static int
5124nfs4_init_uniform_client_string(struct nfs_client *clp)
5125{
5126 size_t len;
5127 char *str;
5128
5129 if (clp->cl_owner_id != NULL)
5130 return 0;
5131
5132 if (nfs4_client_id_uniquifier[0] != '\0')
5133 return nfs4_init_uniquifier_client_string(clp);
5134
5135 len = 10 + 10 + 1 + 10 + 1 +
5136 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5137
5138 if (len > NFS4_OPAQUE_LIMIT + 1)
5139 return -EINVAL;
5140
5141 /*
5142 * Since this string is allocated at mount time, and held until the
5143 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5144 * about a memory-reclaim deadlock.
5145 */
5146 str = kmalloc(len, GFP_KERNEL);
5147 if (!str)
5148 return -ENOMEM;
5149
5150 scnprintf(str, len, "Linux NFSv%u.%u %s",
5151 clp->rpc_ops->version, clp->cl_minorversion,
5152 clp->cl_rpcclient->cl_nodename);
5153 clp->cl_owner_id = str;
5154 return 0;
5155}
5156
5157/*
5158 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5159 * services. Advertise one based on the address family of the
5160 * clientaddr.
5161 */
5162static unsigned int
5163nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5164{
5165 if (strchr(clp->cl_ipaddr, ':') != NULL)
5166 return scnprintf(buf, len, "tcp6");
5167 else
5168 return scnprintf(buf, len, "tcp");
5169}
5170
5171static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5172{
5173 struct nfs4_setclientid *sc = calldata;
5174
5175 if (task->tk_status == 0)
5176 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5177}
5178
5179static const struct rpc_call_ops nfs4_setclientid_ops = {
5180 .rpc_call_done = nfs4_setclientid_done,
5181};
5182
5183/**
5184 * nfs4_proc_setclientid - Negotiate client ID
5185 * @clp: state data structure
5186 * @program: RPC program for NFSv4 callback service
5187 * @port: IP port number for NFS4 callback service
5188 * @cred: RPC credential to use for this call
5189 * @res: where to place the result
5190 *
5191 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5192 */
5193int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5194 unsigned short port, struct rpc_cred *cred,
5195 struct nfs4_setclientid_res *res)
5196{
5197 nfs4_verifier sc_verifier;
5198 struct nfs4_setclientid setclientid = {
5199 .sc_verifier = &sc_verifier,
5200 .sc_prog = program,
5201 .sc_clnt = clp,
5202 };
5203 struct rpc_message msg = {
5204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5205 .rpc_argp = &setclientid,
5206 .rpc_resp = res,
5207 .rpc_cred = cred,
5208 };
5209 struct rpc_task *task;
5210 struct rpc_task_setup task_setup_data = {
5211 .rpc_client = clp->cl_rpcclient,
5212 .rpc_message = &msg,
5213 .callback_ops = &nfs4_setclientid_ops,
5214 .callback_data = &setclientid,
5215 .flags = RPC_TASK_TIMEOUT,
5216 };
5217 int status;
5218
5219 /* nfs_client_id4 */
5220 nfs4_init_boot_verifier(clp, &sc_verifier);
5221
5222 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5223 status = nfs4_init_uniform_client_string(clp);
5224 else
5225 status = nfs4_init_nonuniform_client_string(clp);
5226
5227 if (status)
5228 goto out;
5229
5230 /* cb_client4 */
5231 setclientid.sc_netid_len =
5232 nfs4_init_callback_netid(clp,
5233 setclientid.sc_netid,
5234 sizeof(setclientid.sc_netid));
5235 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5236 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5237 clp->cl_ipaddr, port >> 8, port & 255);
5238
5239 dprintk("NFS call setclientid auth=%s, '%s'\n",
5240 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5241 clp->cl_owner_id);
5242 task = rpc_run_task(&task_setup_data);
5243 if (IS_ERR(task)) {
5244 status = PTR_ERR(task);
5245 goto out;
5246 }
5247 status = task->tk_status;
5248 if (setclientid.sc_cred) {
5249 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5250 put_rpccred(setclientid.sc_cred);
5251 }
5252 rpc_put_task(task);
5253out:
5254 trace_nfs4_setclientid(clp, status);
5255 dprintk("NFS reply setclientid: %d\n", status);
5256 return status;
5257}
5258
5259/**
5260 * nfs4_proc_setclientid_confirm - Confirm client ID
5261 * @clp: state data structure
5262 * @res: result of a previous SETCLIENTID
5263 * @cred: RPC credential to use for this call
5264 *
5265 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5266 */
5267int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5268 struct nfs4_setclientid_res *arg,
5269 struct rpc_cred *cred)
5270{
5271 struct rpc_message msg = {
5272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5273 .rpc_argp = arg,
5274 .rpc_cred = cred,
5275 };
5276 int status;
5277
5278 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5279 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5280 clp->cl_clientid);
5281 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5282 trace_nfs4_setclientid_confirm(clp, status);
5283 dprintk("NFS reply setclientid_confirm: %d\n", status);
5284 return status;
5285}
5286
5287struct nfs4_delegreturndata {
5288 struct nfs4_delegreturnargs args;
5289 struct nfs4_delegreturnres res;
5290 struct nfs_fh fh;
5291 nfs4_stateid stateid;
5292 unsigned long timestamp;
5293 struct nfs_fattr fattr;
5294 int rpc_status;
5295 struct inode *inode;
5296 bool roc;
5297 u32 roc_barrier;
5298};
5299
5300static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5301{
5302 struct nfs4_delegreturndata *data = calldata;
5303
5304 if (!nfs4_sequence_done(task, &data->res.seq_res))
5305 return;
5306
5307 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5308 switch (task->tk_status) {
5309 case 0:
5310 renew_lease(data->res.server, data->timestamp);
5311 case -NFS4ERR_ADMIN_REVOKED:
5312 case -NFS4ERR_DELEG_REVOKED:
5313 case -NFS4ERR_BAD_STATEID:
5314 case -NFS4ERR_OLD_STATEID:
5315 case -NFS4ERR_STALE_STATEID:
5316 case -NFS4ERR_EXPIRED:
5317 task->tk_status = 0;
5318 if (data->roc)
5319 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5320 break;
5321 default:
5322 if (nfs4_async_handle_error(task, data->res.server,
5323 NULL, NULL) == -EAGAIN) {
5324 rpc_restart_call_prepare(task);
5325 return;
5326 }
5327 }
5328 data->rpc_status = task->tk_status;
5329}
5330
5331static void nfs4_delegreturn_release(void *calldata)
5332{
5333 struct nfs4_delegreturndata *data = calldata;
5334 struct inode *inode = data->inode;
5335
5336 if (inode) {
5337 if (data->roc)
5338 pnfs_roc_release(inode);
5339 nfs_iput_and_deactive(inode);
5340 }
5341 kfree(calldata);
5342}
5343
5344static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5345{
5346 struct nfs4_delegreturndata *d_data;
5347
5348 d_data = (struct nfs4_delegreturndata *)data;
5349
5350 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5351 return;
5352
5353 if (d_data->roc)
5354 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5355
5356 nfs4_setup_sequence(d_data->res.server,
5357 &d_data->args.seq_args,
5358 &d_data->res.seq_res,
5359 task);
5360}
5361
5362static const struct rpc_call_ops nfs4_delegreturn_ops = {
5363 .rpc_call_prepare = nfs4_delegreturn_prepare,
5364 .rpc_call_done = nfs4_delegreturn_done,
5365 .rpc_release = nfs4_delegreturn_release,
5366};
5367
5368static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5369{
5370 struct nfs4_delegreturndata *data;
5371 struct nfs_server *server = NFS_SERVER(inode);
5372 struct rpc_task *task;
5373 struct rpc_message msg = {
5374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5375 .rpc_cred = cred,
5376 };
5377 struct rpc_task_setup task_setup_data = {
5378 .rpc_client = server->client,
5379 .rpc_message = &msg,
5380 .callback_ops = &nfs4_delegreturn_ops,
5381 .flags = RPC_TASK_ASYNC,
5382 };
5383 int status = 0;
5384
5385 data = kzalloc(sizeof(*data), GFP_NOFS);
5386 if (data == NULL)
5387 return -ENOMEM;
5388 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5389
5390 nfs4_state_protect(server->nfs_client,
5391 NFS_SP4_MACH_CRED_CLEANUP,
5392 &task_setup_data.rpc_client, &msg);
5393
5394 data->args.fhandle = &data->fh;
5395 data->args.stateid = &data->stateid;
5396 data->args.bitmask = server->cache_consistency_bitmask;
5397 nfs_copy_fh(&data->fh, NFS_FH(inode));
5398 nfs4_stateid_copy(&data->stateid, stateid);
5399 data->res.fattr = &data->fattr;
5400 data->res.server = server;
5401 nfs_fattr_init(data->res.fattr);
5402 data->timestamp = jiffies;
5403 data->rpc_status = 0;
5404 data->inode = nfs_igrab_and_active(inode);
5405 if (data->inode)
5406 data->roc = nfs4_roc(inode);
5407
5408 task_setup_data.callback_data = data;
5409 msg.rpc_argp = &data->args;
5410 msg.rpc_resp = &data->res;
5411 task = rpc_run_task(&task_setup_data);
5412 if (IS_ERR(task))
5413 return PTR_ERR(task);
5414 if (!issync)
5415 goto out;
5416 status = nfs4_wait_for_completion_rpc_task(task);
5417 if (status != 0)
5418 goto out;
5419 status = data->rpc_status;
5420 if (status == 0)
5421 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5422 else
5423 nfs_refresh_inode(inode, &data->fattr);
5424out:
5425 rpc_put_task(task);
5426 return status;
5427}
5428
5429int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5430{
5431 struct nfs_server *server = NFS_SERVER(inode);
5432 struct nfs4_exception exception = { };
5433 int err;
5434 do {
5435 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5436 trace_nfs4_delegreturn(inode, stateid, err);
5437 switch (err) {
5438 case -NFS4ERR_STALE_STATEID:
5439 case -NFS4ERR_EXPIRED:
5440 case 0:
5441 return 0;
5442 }
5443 err = nfs4_handle_exception(server, err, &exception);
5444 } while (exception.retry);
5445 return err;
5446}
5447
5448#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5449#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5450
5451/*
5452 * sleep, with exponential backoff, and retry the LOCK operation.
5453 */
5454static unsigned long
5455nfs4_set_lock_task_retry(unsigned long timeout)
5456{
5457 freezable_schedule_timeout_killable_unsafe(timeout);
5458 timeout <<= 1;
5459 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5460 return NFS4_LOCK_MAXTIMEOUT;
5461 return timeout;
5462}
5463
5464static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5465{
5466 struct inode *inode = state->inode;
5467 struct nfs_server *server = NFS_SERVER(inode);
5468 struct nfs_client *clp = server->nfs_client;
5469 struct nfs_lockt_args arg = {
5470 .fh = NFS_FH(inode),
5471 .fl = request,
5472 };
5473 struct nfs_lockt_res res = {
5474 .denied = request,
5475 };
5476 struct rpc_message msg = {
5477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5478 .rpc_argp = &arg,
5479 .rpc_resp = &res,
5480 .rpc_cred = state->owner->so_cred,
5481 };
5482 struct nfs4_lock_state *lsp;
5483 int status;
5484
5485 arg.lock_owner.clientid = clp->cl_clientid;
5486 status = nfs4_set_lock_state(state, request);
5487 if (status != 0)
5488 goto out;
5489 lsp = request->fl_u.nfs4_fl.owner;
5490 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5491 arg.lock_owner.s_dev = server->s_dev;
5492 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5493 switch (status) {
5494 case 0:
5495 request->fl_type = F_UNLCK;
5496 break;
5497 case -NFS4ERR_DENIED:
5498 status = 0;
5499 }
5500 request->fl_ops->fl_release_private(request);
5501 request->fl_ops = NULL;
5502out:
5503 return status;
5504}
5505
5506static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5507{
5508 struct nfs4_exception exception = { };
5509 int err;
5510
5511 do {
5512 err = _nfs4_proc_getlk(state, cmd, request);
5513 trace_nfs4_get_lock(request, state, cmd, err);
5514 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5515 &exception);
5516 } while (exception.retry);
5517 return err;
5518}
5519
5520static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
5521{
5522 return locks_lock_inode_wait(inode, fl);
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 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 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
5947 return ret;
5948}
5949
5950static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5951{
5952 struct nfs_server *server = NFS_SERVER(state->inode);
5953 struct nfs4_exception exception = {
5954 .inode = state->inode,
5955 };
5956 int err;
5957
5958 do {
5959 /* Cache the lock if possible... */
5960 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5961 return 0;
5962 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
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 switch (err) {
5990 default:
5991 goto out;
5992 case -NFS4ERR_GRACE:
5993 case -NFS4ERR_DELAY:
5994 nfs4_handle_exception(server, err, &exception);
5995 err = 0;
5996 }
5997 } while (exception.retry);
5998out:
5999 return err;
6000}
6001
6002#if defined(CONFIG_NFS_V4_1)
6003/**
6004 * nfs41_check_expired_locks - possibly free a lock stateid
6005 *
6006 * @state: NFSv4 state for an inode
6007 *
6008 * Returns NFS_OK if recovery for this stateid is now finished.
6009 * Otherwise a negative NFS4ERR value is returned.
6010 */
6011static int nfs41_check_expired_locks(struct nfs4_state *state)
6012{
6013 int status, ret = -NFS4ERR_BAD_STATEID;
6014 struct nfs4_lock_state *lsp;
6015 struct nfs_server *server = NFS_SERVER(state->inode);
6016
6017 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
6018 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
6019 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6020
6021 status = nfs41_test_stateid(server,
6022 &lsp->ls_stateid,
6023 cred);
6024 trace_nfs4_test_lock_stateid(state, lsp, status);
6025 if (status != NFS_OK) {
6026 /* Free the stateid unless the server
6027 * informs us the stateid is unrecognized. */
6028 if (status != -NFS4ERR_BAD_STATEID)
6029 nfs41_free_stateid(server,
6030 &lsp->ls_stateid,
6031 cred);
6032 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6033 ret = status;
6034 }
6035 }
6036 };
6037
6038 return ret;
6039}
6040
6041static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6042{
6043 int status = NFS_OK;
6044
6045 if (test_bit(LK_STATE_IN_USE, &state->flags))
6046 status = nfs41_check_expired_locks(state);
6047 if (status != NFS_OK)
6048 status = nfs4_lock_expired(state, request);
6049 return status;
6050}
6051#endif
6052
6053static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6054{
6055 struct nfs_inode *nfsi = NFS_I(state->inode);
6056 unsigned char fl_flags = request->fl_flags;
6057 int status = -ENOLCK;
6058
6059 if ((fl_flags & FL_POSIX) &&
6060 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6061 goto out;
6062 /* Is this a delegated open? */
6063 status = nfs4_set_lock_state(state, request);
6064 if (status != 0)
6065 goto out;
6066 request->fl_flags |= FL_ACCESS;
6067 status = do_vfs_lock(state->inode, request);
6068 if (status < 0)
6069 goto out;
6070 down_read(&nfsi->rwsem);
6071 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6072 /* Yes: cache locks! */
6073 /* ...but avoid races with delegation recall... */
6074 request->fl_flags = fl_flags & ~FL_SLEEP;
6075 status = do_vfs_lock(state->inode, request);
6076 up_read(&nfsi->rwsem);
6077 goto out;
6078 }
6079 up_read(&nfsi->rwsem);
6080 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6081out:
6082 request->fl_flags = fl_flags;
6083 return status;
6084}
6085
6086static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6087{
6088 struct nfs4_exception exception = {
6089 .state = state,
6090 .inode = state->inode,
6091 };
6092 int err;
6093
6094 do {
6095 err = _nfs4_proc_setlk(state, cmd, request);
6096 if (err == -NFS4ERR_DENIED)
6097 err = -EAGAIN;
6098 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6099 err, &exception);
6100 } while (exception.retry);
6101 return err;
6102}
6103
6104static int
6105nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6106{
6107 struct nfs_open_context *ctx;
6108 struct nfs4_state *state;
6109 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6110 int status;
6111
6112 /* verify open state */
6113 ctx = nfs_file_open_context(filp);
6114 state = ctx->state;
6115
6116 if (request->fl_start < 0 || request->fl_end < 0)
6117 return -EINVAL;
6118
6119 if (IS_GETLK(cmd)) {
6120 if (state != NULL)
6121 return nfs4_proc_getlk(state, F_GETLK, request);
6122 return 0;
6123 }
6124
6125 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6126 return -EINVAL;
6127
6128 if (request->fl_type == F_UNLCK) {
6129 if (state != NULL)
6130 return nfs4_proc_unlck(state, cmd, request);
6131 return 0;
6132 }
6133
6134 if (state == NULL)
6135 return -ENOLCK;
6136 /*
6137 * Don't rely on the VFS having checked the file open mode,
6138 * since it won't do this for flock() locks.
6139 */
6140 switch (request->fl_type) {
6141 case F_RDLCK:
6142 if (!(filp->f_mode & FMODE_READ))
6143 return -EBADF;
6144 break;
6145 case F_WRLCK:
6146 if (!(filp->f_mode & FMODE_WRITE))
6147 return -EBADF;
6148 }
6149
6150 do {
6151 status = nfs4_proc_setlk(state, cmd, request);
6152 if ((status != -EAGAIN) || IS_SETLK(cmd))
6153 break;
6154 timeout = nfs4_set_lock_task_retry(timeout);
6155 status = -ERESTARTSYS;
6156 if (signalled())
6157 break;
6158 } while(status < 0);
6159 return status;
6160}
6161
6162int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6163{
6164 struct nfs_server *server = NFS_SERVER(state->inode);
6165 int err;
6166
6167 err = nfs4_set_lock_state(state, fl);
6168 if (err != 0)
6169 return err;
6170 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6171 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6172}
6173
6174struct nfs_release_lockowner_data {
6175 struct nfs4_lock_state *lsp;
6176 struct nfs_server *server;
6177 struct nfs_release_lockowner_args args;
6178 struct nfs_release_lockowner_res res;
6179 unsigned long timestamp;
6180};
6181
6182static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6183{
6184 struct nfs_release_lockowner_data *data = calldata;
6185 struct nfs_server *server = data->server;
6186 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6187 &data->args.seq_args, &data->res.seq_res, task);
6188 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6189 data->timestamp = jiffies;
6190}
6191
6192static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6193{
6194 struct nfs_release_lockowner_data *data = calldata;
6195 struct nfs_server *server = data->server;
6196
6197 nfs40_sequence_done(task, &data->res.seq_res);
6198
6199 switch (task->tk_status) {
6200 case 0:
6201 renew_lease(server, data->timestamp);
6202 break;
6203 case -NFS4ERR_STALE_CLIENTID:
6204 case -NFS4ERR_EXPIRED:
6205 nfs4_schedule_lease_recovery(server->nfs_client);
6206 break;
6207 case -NFS4ERR_LEASE_MOVED:
6208 case -NFS4ERR_DELAY:
6209 if (nfs4_async_handle_error(task, server,
6210 NULL, NULL) == -EAGAIN)
6211 rpc_restart_call_prepare(task);
6212 }
6213}
6214
6215static void nfs4_release_lockowner_release(void *calldata)
6216{
6217 struct nfs_release_lockowner_data *data = calldata;
6218 nfs4_free_lock_state(data->server, data->lsp);
6219 kfree(calldata);
6220}
6221
6222static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6223 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6224 .rpc_call_done = nfs4_release_lockowner_done,
6225 .rpc_release = nfs4_release_lockowner_release,
6226};
6227
6228static void
6229nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6230{
6231 struct nfs_release_lockowner_data *data;
6232 struct rpc_message msg = {
6233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6234 };
6235
6236 if (server->nfs_client->cl_mvops->minor_version != 0)
6237 return;
6238
6239 data = kmalloc(sizeof(*data), GFP_NOFS);
6240 if (!data)
6241 return;
6242 data->lsp = lsp;
6243 data->server = server;
6244 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6245 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6246 data->args.lock_owner.s_dev = server->s_dev;
6247
6248 msg.rpc_argp = &data->args;
6249 msg.rpc_resp = &data->res;
6250 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6251 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6252}
6253
6254#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6255
6256static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6257 struct dentry *dentry, const char *key,
6258 const void *buf, size_t buflen,
6259 int flags)
6260{
6261 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6262}
6263
6264static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6265 struct dentry *dentry, const char *key,
6266 void *buf, size_t buflen)
6267{
6268 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6269}
6270
6271static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6272{
6273 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6274}
6275
6276#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6277
6278static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6279 struct dentry *dentry, const char *key,
6280 const void *buf, size_t buflen,
6281 int flags)
6282{
6283 if (security_ismaclabel(key))
6284 return nfs4_set_security_label(dentry, buf, buflen);
6285
6286 return -EOPNOTSUPP;
6287}
6288
6289static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6290 struct dentry *dentry, const char *key,
6291 void *buf, size_t buflen)
6292{
6293 if (security_ismaclabel(key))
6294 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
6295 return -EOPNOTSUPP;
6296}
6297
6298static ssize_t
6299nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6300{
6301 int len = 0;
6302
6303 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6304 len = security_inode_listsecurity(inode, list, list_len);
6305 if (list_len && len > list_len)
6306 return -ERANGE;
6307 }
6308 return len;
6309}
6310
6311static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6312 .prefix = XATTR_SECURITY_PREFIX,
6313 .get = nfs4_xattr_get_nfs4_label,
6314 .set = nfs4_xattr_set_nfs4_label,
6315};
6316
6317#else
6318
6319static ssize_t
6320nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6321{
6322 return 0;
6323}
6324
6325#endif
6326
6327/*
6328 * nfs_fhget will use either the mounted_on_fileid or the fileid
6329 */
6330static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6331{
6332 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6333 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6334 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6335 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6336 return;
6337
6338 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6339 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6340 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6341 fattr->nlink = 2;
6342}
6343
6344static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6345 const struct qstr *name,
6346 struct nfs4_fs_locations *fs_locations,
6347 struct page *page)
6348{
6349 struct nfs_server *server = NFS_SERVER(dir);
6350 u32 bitmask[3] = {
6351 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6352 };
6353 struct nfs4_fs_locations_arg args = {
6354 .dir_fh = NFS_FH(dir),
6355 .name = name,
6356 .page = page,
6357 .bitmask = bitmask,
6358 };
6359 struct nfs4_fs_locations_res res = {
6360 .fs_locations = fs_locations,
6361 };
6362 struct rpc_message msg = {
6363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6364 .rpc_argp = &args,
6365 .rpc_resp = &res,
6366 };
6367 int status;
6368
6369 dprintk("%s: start\n", __func__);
6370
6371 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6372 * is not supported */
6373 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6374 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6375 else
6376 bitmask[0] |= FATTR4_WORD0_FILEID;
6377
6378 nfs_fattr_init(&fs_locations->fattr);
6379 fs_locations->server = server;
6380 fs_locations->nlocations = 0;
6381 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6382 dprintk("%s: returned status = %d\n", __func__, status);
6383 return status;
6384}
6385
6386int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6387 const struct qstr *name,
6388 struct nfs4_fs_locations *fs_locations,
6389 struct page *page)
6390{
6391 struct nfs4_exception exception = { };
6392 int err;
6393 do {
6394 err = _nfs4_proc_fs_locations(client, dir, name,
6395 fs_locations, page);
6396 trace_nfs4_get_fs_locations(dir, name, err);
6397 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6398 &exception);
6399 } while (exception.retry);
6400 return err;
6401}
6402
6403/*
6404 * This operation also signals the server that this client is
6405 * performing migration recovery. The server can stop returning
6406 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6407 * appended to this compound to identify the client ID which is
6408 * performing recovery.
6409 */
6410static int _nfs40_proc_get_locations(struct inode *inode,
6411 struct nfs4_fs_locations *locations,
6412 struct page *page, struct rpc_cred *cred)
6413{
6414 struct nfs_server *server = NFS_SERVER(inode);
6415 struct rpc_clnt *clnt = server->client;
6416 u32 bitmask[2] = {
6417 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6418 };
6419 struct nfs4_fs_locations_arg args = {
6420 .clientid = server->nfs_client->cl_clientid,
6421 .fh = NFS_FH(inode),
6422 .page = page,
6423 .bitmask = bitmask,
6424 .migration = 1, /* skip LOOKUP */
6425 .renew = 1, /* append RENEW */
6426 };
6427 struct nfs4_fs_locations_res res = {
6428 .fs_locations = locations,
6429 .migration = 1,
6430 .renew = 1,
6431 };
6432 struct rpc_message msg = {
6433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6434 .rpc_argp = &args,
6435 .rpc_resp = &res,
6436 .rpc_cred = cred,
6437 };
6438 unsigned long now = jiffies;
6439 int status;
6440
6441 nfs_fattr_init(&locations->fattr);
6442 locations->server = server;
6443 locations->nlocations = 0;
6444
6445 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6446 nfs4_set_sequence_privileged(&args.seq_args);
6447 status = nfs4_call_sync_sequence(clnt, server, &msg,
6448 &args.seq_args, &res.seq_res);
6449 if (status)
6450 return status;
6451
6452 renew_lease(server, now);
6453 return 0;
6454}
6455
6456#ifdef CONFIG_NFS_V4_1
6457
6458/*
6459 * This operation also signals the server that this client is
6460 * performing migration recovery. The server can stop asserting
6461 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6462 * performing this operation is identified in the SEQUENCE
6463 * operation in this compound.
6464 *
6465 * When the client supports GETATTR(fs_locations_info), it can
6466 * be plumbed in here.
6467 */
6468static int _nfs41_proc_get_locations(struct inode *inode,
6469 struct nfs4_fs_locations *locations,
6470 struct page *page, struct rpc_cred *cred)
6471{
6472 struct nfs_server *server = NFS_SERVER(inode);
6473 struct rpc_clnt *clnt = server->client;
6474 u32 bitmask[2] = {
6475 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6476 };
6477 struct nfs4_fs_locations_arg args = {
6478 .fh = NFS_FH(inode),
6479 .page = page,
6480 .bitmask = bitmask,
6481 .migration = 1, /* skip LOOKUP */
6482 };
6483 struct nfs4_fs_locations_res res = {
6484 .fs_locations = locations,
6485 .migration = 1,
6486 };
6487 struct rpc_message msg = {
6488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6489 .rpc_argp = &args,
6490 .rpc_resp = &res,
6491 .rpc_cred = cred,
6492 };
6493 int status;
6494
6495 nfs_fattr_init(&locations->fattr);
6496 locations->server = server;
6497 locations->nlocations = 0;
6498
6499 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6500 nfs4_set_sequence_privileged(&args.seq_args);
6501 status = nfs4_call_sync_sequence(clnt, server, &msg,
6502 &args.seq_args, &res.seq_res);
6503 if (status == NFS4_OK &&
6504 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6505 status = -NFS4ERR_LEASE_MOVED;
6506 return status;
6507}
6508
6509#endif /* CONFIG_NFS_V4_1 */
6510
6511/**
6512 * nfs4_proc_get_locations - discover locations for a migrated FSID
6513 * @inode: inode on FSID that is migrating
6514 * @locations: result of query
6515 * @page: buffer
6516 * @cred: credential to use for this operation
6517 *
6518 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6519 * operation failed, or a negative errno if a local error occurred.
6520 *
6521 * On success, "locations" is filled in, but if the server has
6522 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6523 * asserted.
6524 *
6525 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6526 * from this client that require migration recovery.
6527 */
6528int nfs4_proc_get_locations(struct inode *inode,
6529 struct nfs4_fs_locations *locations,
6530 struct page *page, struct rpc_cred *cred)
6531{
6532 struct nfs_server *server = NFS_SERVER(inode);
6533 struct nfs_client *clp = server->nfs_client;
6534 const struct nfs4_mig_recovery_ops *ops =
6535 clp->cl_mvops->mig_recovery_ops;
6536 struct nfs4_exception exception = { };
6537 int status;
6538
6539 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6540 (unsigned long long)server->fsid.major,
6541 (unsigned long long)server->fsid.minor,
6542 clp->cl_hostname);
6543 nfs_display_fhandle(NFS_FH(inode), __func__);
6544
6545 do {
6546 status = ops->get_locations(inode, locations, page, cred);
6547 if (status != -NFS4ERR_DELAY)
6548 break;
6549 nfs4_handle_exception(server, status, &exception);
6550 } while (exception.retry);
6551 return status;
6552}
6553
6554/*
6555 * This operation also signals the server that this client is
6556 * performing "lease moved" recovery. The server can stop
6557 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6558 * is appended to this compound to identify the client ID which is
6559 * performing recovery.
6560 */
6561static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6562{
6563 struct nfs_server *server = NFS_SERVER(inode);
6564 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6565 struct rpc_clnt *clnt = server->client;
6566 struct nfs4_fsid_present_arg args = {
6567 .fh = NFS_FH(inode),
6568 .clientid = clp->cl_clientid,
6569 .renew = 1, /* append RENEW */
6570 };
6571 struct nfs4_fsid_present_res res = {
6572 .renew = 1,
6573 };
6574 struct rpc_message msg = {
6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6576 .rpc_argp = &args,
6577 .rpc_resp = &res,
6578 .rpc_cred = cred,
6579 };
6580 unsigned long now = jiffies;
6581 int status;
6582
6583 res.fh = nfs_alloc_fhandle();
6584 if (res.fh == NULL)
6585 return -ENOMEM;
6586
6587 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6588 nfs4_set_sequence_privileged(&args.seq_args);
6589 status = nfs4_call_sync_sequence(clnt, server, &msg,
6590 &args.seq_args, &res.seq_res);
6591 nfs_free_fhandle(res.fh);
6592 if (status)
6593 return status;
6594
6595 do_renew_lease(clp, now);
6596 return 0;
6597}
6598
6599#ifdef CONFIG_NFS_V4_1
6600
6601/*
6602 * This operation also signals the server that this client is
6603 * performing "lease moved" recovery. The server can stop asserting
6604 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6605 * this operation is identified in the SEQUENCE operation in this
6606 * compound.
6607 */
6608static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6609{
6610 struct nfs_server *server = NFS_SERVER(inode);
6611 struct rpc_clnt *clnt = server->client;
6612 struct nfs4_fsid_present_arg args = {
6613 .fh = NFS_FH(inode),
6614 };
6615 struct nfs4_fsid_present_res res = {
6616 };
6617 struct rpc_message msg = {
6618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6619 .rpc_argp = &args,
6620 .rpc_resp = &res,
6621 .rpc_cred = cred,
6622 };
6623 int status;
6624
6625 res.fh = nfs_alloc_fhandle();
6626 if (res.fh == NULL)
6627 return -ENOMEM;
6628
6629 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6630 nfs4_set_sequence_privileged(&args.seq_args);
6631 status = nfs4_call_sync_sequence(clnt, server, &msg,
6632 &args.seq_args, &res.seq_res);
6633 nfs_free_fhandle(res.fh);
6634 if (status == NFS4_OK &&
6635 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6636 status = -NFS4ERR_LEASE_MOVED;
6637 return status;
6638}
6639
6640#endif /* CONFIG_NFS_V4_1 */
6641
6642/**
6643 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6644 * @inode: inode on FSID to check
6645 * @cred: credential to use for this operation
6646 *
6647 * Server indicates whether the FSID is present, moved, or not
6648 * recognized. This operation is necessary to clear a LEASE_MOVED
6649 * condition for this client ID.
6650 *
6651 * Returns NFS4_OK if the FSID is present on this server,
6652 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6653 * NFS4ERR code if some error occurred on the server, or a
6654 * negative errno if a local failure occurred.
6655 */
6656int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6657{
6658 struct nfs_server *server = NFS_SERVER(inode);
6659 struct nfs_client *clp = server->nfs_client;
6660 const struct nfs4_mig_recovery_ops *ops =
6661 clp->cl_mvops->mig_recovery_ops;
6662 struct nfs4_exception exception = { };
6663 int status;
6664
6665 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6666 (unsigned long long)server->fsid.major,
6667 (unsigned long long)server->fsid.minor,
6668 clp->cl_hostname);
6669 nfs_display_fhandle(NFS_FH(inode), __func__);
6670
6671 do {
6672 status = ops->fsid_present(inode, cred);
6673 if (status != -NFS4ERR_DELAY)
6674 break;
6675 nfs4_handle_exception(server, status, &exception);
6676 } while (exception.retry);
6677 return status;
6678}
6679
6680/**
6681 * If 'use_integrity' is true and the state managment nfs_client
6682 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6683 * and the machine credential as per RFC3530bis and RFC5661 Security
6684 * Considerations sections. Otherwise, just use the user cred with the
6685 * filesystem's rpc_client.
6686 */
6687static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6688{
6689 int status;
6690 struct nfs4_secinfo_arg args = {
6691 .dir_fh = NFS_FH(dir),
6692 .name = name,
6693 };
6694 struct nfs4_secinfo_res res = {
6695 .flavors = flavors,
6696 };
6697 struct rpc_message msg = {
6698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6699 .rpc_argp = &args,
6700 .rpc_resp = &res,
6701 };
6702 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6703 struct rpc_cred *cred = NULL;
6704
6705 if (use_integrity) {
6706 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6707 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6708 msg.rpc_cred = cred;
6709 }
6710
6711 dprintk("NFS call secinfo %s\n", name->name);
6712
6713 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6714 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6715
6716 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6717 &res.seq_res, 0);
6718 dprintk("NFS reply secinfo: %d\n", status);
6719
6720 if (cred)
6721 put_rpccred(cred);
6722
6723 return status;
6724}
6725
6726int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6727 struct nfs4_secinfo_flavors *flavors)
6728{
6729 struct nfs4_exception exception = { };
6730 int err;
6731 do {
6732 err = -NFS4ERR_WRONGSEC;
6733
6734 /* try to use integrity protection with machine cred */
6735 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6736 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6737
6738 /*
6739 * if unable to use integrity protection, or SECINFO with
6740 * integrity protection returns NFS4ERR_WRONGSEC (which is
6741 * disallowed by spec, but exists in deployed servers) use
6742 * the current filesystem's rpc_client and the user cred.
6743 */
6744 if (err == -NFS4ERR_WRONGSEC)
6745 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6746
6747 trace_nfs4_secinfo(dir, name, err);
6748 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6749 &exception);
6750 } while (exception.retry);
6751 return err;
6752}
6753
6754#ifdef CONFIG_NFS_V4_1
6755/*
6756 * Check the exchange flags returned by the server for invalid flags, having
6757 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6758 * DS flags set.
6759 */
6760static int nfs4_check_cl_exchange_flags(u32 flags)
6761{
6762 if (flags & ~EXCHGID4_FLAG_MASK_R)
6763 goto out_inval;
6764 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6765 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6766 goto out_inval;
6767 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6768 goto out_inval;
6769 return NFS_OK;
6770out_inval:
6771 return -NFS4ERR_INVAL;
6772}
6773
6774static bool
6775nfs41_same_server_scope(struct nfs41_server_scope *a,
6776 struct nfs41_server_scope *b)
6777{
6778 if (a->server_scope_sz == b->server_scope_sz &&
6779 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6780 return true;
6781
6782 return false;
6783}
6784
6785/*
6786 * nfs4_proc_bind_conn_to_session()
6787 *
6788 * The 4.1 client currently uses the same TCP connection for the
6789 * fore and backchannel.
6790 */
6791int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6792{
6793 int status;
6794 struct nfs41_bind_conn_to_session_args args = {
6795 .client = clp,
6796 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6797 };
6798 struct nfs41_bind_conn_to_session_res res;
6799 struct rpc_message msg = {
6800 .rpc_proc =
6801 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6802 .rpc_argp = &args,
6803 .rpc_resp = &res,
6804 .rpc_cred = cred,
6805 };
6806
6807 dprintk("--> %s\n", __func__);
6808
6809 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6810 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6811 args.dir = NFS4_CDFC4_FORE;
6812
6813 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6814 trace_nfs4_bind_conn_to_session(clp, status);
6815 if (status == 0) {
6816 if (memcmp(res.sessionid.data,
6817 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6818 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6819 status = -EIO;
6820 goto out;
6821 }
6822 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6823 dprintk("NFS: %s: Unexpected direction from server\n",
6824 __func__);
6825 status = -EIO;
6826 goto out;
6827 }
6828 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6829 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6830 __func__);
6831 status = -EIO;
6832 goto out;
6833 }
6834 }
6835out:
6836 dprintk("<-- %s status= %d\n", __func__, status);
6837 return status;
6838}
6839
6840/*
6841 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6842 * and operations we'd like to see to enable certain features in the allow map
6843 */
6844static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6845 .how = SP4_MACH_CRED,
6846 .enforce.u.words = {
6847 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6848 1 << (OP_EXCHANGE_ID - 32) |
6849 1 << (OP_CREATE_SESSION - 32) |
6850 1 << (OP_DESTROY_SESSION - 32) |
6851 1 << (OP_DESTROY_CLIENTID - 32)
6852 },
6853 .allow.u.words = {
6854 [0] = 1 << (OP_CLOSE) |
6855 1 << (OP_OPEN_DOWNGRADE) |
6856 1 << (OP_LOCKU) |
6857 1 << (OP_DELEGRETURN) |
6858 1 << (OP_COMMIT),
6859 [1] = 1 << (OP_SECINFO - 32) |
6860 1 << (OP_SECINFO_NO_NAME - 32) |
6861 1 << (OP_LAYOUTRETURN - 32) |
6862 1 << (OP_TEST_STATEID - 32) |
6863 1 << (OP_FREE_STATEID - 32) |
6864 1 << (OP_WRITE - 32)
6865 }
6866};
6867
6868/*
6869 * Select the state protection mode for client `clp' given the server results
6870 * from exchange_id in `sp'.
6871 *
6872 * Returns 0 on success, negative errno otherwise.
6873 */
6874static int nfs4_sp4_select_mode(struct nfs_client *clp,
6875 struct nfs41_state_protection *sp)
6876{
6877 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6878 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6879 1 << (OP_EXCHANGE_ID - 32) |
6880 1 << (OP_CREATE_SESSION - 32) |
6881 1 << (OP_DESTROY_SESSION - 32) |
6882 1 << (OP_DESTROY_CLIENTID - 32)
6883 };
6884 unsigned int i;
6885
6886 if (sp->how == SP4_MACH_CRED) {
6887 /* Print state protect result */
6888 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6889 for (i = 0; i <= LAST_NFS4_OP; i++) {
6890 if (test_bit(i, sp->enforce.u.longs))
6891 dfprintk(MOUNT, " enforce op %d\n", i);
6892 if (test_bit(i, sp->allow.u.longs))
6893 dfprintk(MOUNT, " allow op %d\n", i);
6894 }
6895
6896 /* make sure nothing is on enforce list that isn't supported */
6897 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6898 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6899 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6900 return -EINVAL;
6901 }
6902 }
6903
6904 /*
6905 * Minimal mode - state operations are allowed to use machine
6906 * credential. Note this already happens by default, so the
6907 * client doesn't have to do anything more than the negotiation.
6908 *
6909 * NOTE: we don't care if EXCHANGE_ID is in the list -
6910 * we're already using the machine cred for exchange_id
6911 * and will never use a different cred.
6912 */
6913 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6914 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6915 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6916 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6917 dfprintk(MOUNT, "sp4_mach_cred:\n");
6918 dfprintk(MOUNT, " minimal mode enabled\n");
6919 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6920 } else {
6921 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6922 return -EINVAL;
6923 }
6924
6925 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6926 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
6927 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
6928 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6929 dfprintk(MOUNT, " cleanup mode enabled\n");
6930 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6931 }
6932
6933 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
6934 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
6935 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
6936 &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 int ret;
7768
7769 dprintk("--> %s\n", __func__);
7770 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7771 * right now covering the LAYOUTGET we are about to send.
7772 * However, that is not so catastrophic, and there seems
7773 * to be no way to prevent it completely.
7774 */
7775 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7776 &lgp->res.seq_res, task))
7777 return;
7778 ret = pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7779 NFS_I(lgp->args.inode)->layout,
7780 &lgp->args.range,
7781 lgp->args.ctx->state);
7782 if (ret < 0)
7783 rpc_exit(task, ret);
7784}
7785
7786static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7787{
7788 struct nfs4_layoutget *lgp = calldata;
7789 struct inode *inode = lgp->args.inode;
7790 struct nfs_server *server = NFS_SERVER(inode);
7791 struct pnfs_layout_hdr *lo;
7792 struct nfs4_state *state = NULL;
7793 unsigned long timeo, now, giveup;
7794
7795 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7796
7797 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7798 goto out;
7799
7800 switch (task->tk_status) {
7801 case 0:
7802 goto out;
7803
7804 /*
7805 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7806 * on the file. set tk_status to -ENODATA to tell upper layer to
7807 * retry go inband.
7808 */
7809 case -NFS4ERR_LAYOUTUNAVAILABLE:
7810 task->tk_status = -ENODATA;
7811 goto out;
7812 /*
7813 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7814 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7815 */
7816 case -NFS4ERR_BADLAYOUT:
7817 goto out_overflow;
7818 /*
7819 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7820 * (or clients) writing to the same RAID stripe except when
7821 * the minlength argument is 0 (see RFC5661 section 18.43.3).
7822 */
7823 case -NFS4ERR_LAYOUTTRYLATER:
7824 if (lgp->args.minlength == 0)
7825 goto out_overflow;
7826 /*
7827 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7828 * existing layout before getting a new one).
7829 */
7830 case -NFS4ERR_RECALLCONFLICT:
7831 timeo = rpc_get_timeout(task->tk_client);
7832 giveup = lgp->args.timestamp + timeo;
7833 now = jiffies;
7834 if (time_after(giveup, now)) {
7835 unsigned long delay;
7836
7837 /* Delay for:
7838 * - Not less then NFS4_POLL_RETRY_MIN.
7839 * - One last time a jiffie before we give up
7840 * - exponential backoff (time_now minus start_attempt)
7841 */
7842 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7843 min((giveup - now - 1),
7844 now - lgp->args.timestamp));
7845
7846 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7847 __func__, delay);
7848 rpc_delay(task, delay);
7849 /* Do not call nfs4_async_handle_error() */
7850 goto out_restart;
7851 }
7852 break;
7853 case -NFS4ERR_EXPIRED:
7854 case -NFS4ERR_BAD_STATEID:
7855 spin_lock(&inode->i_lock);
7856 if (nfs4_stateid_match(&lgp->args.stateid,
7857 &lgp->args.ctx->state->stateid)) {
7858 spin_unlock(&inode->i_lock);
7859 /* If the open stateid was bad, then recover it. */
7860 state = lgp->args.ctx->state;
7861 break;
7862 }
7863 lo = NFS_I(inode)->layout;
7864 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7865 &lo->plh_stateid)) {
7866 LIST_HEAD(head);
7867
7868 /*
7869 * Mark the bad layout state as invalid, then retry
7870 * with the current stateid.
7871 */
7872 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
7873 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7874 spin_unlock(&inode->i_lock);
7875 pnfs_free_lseg_list(&head);
7876 } else
7877 spin_unlock(&inode->i_lock);
7878 goto out_restart;
7879 }
7880 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
7881 goto out_restart;
7882out:
7883 dprintk("<-- %s\n", __func__);
7884 return;
7885out_restart:
7886 task->tk_status = 0;
7887 rpc_restart_call_prepare(task);
7888 return;
7889out_overflow:
7890 task->tk_status = -EOVERFLOW;
7891 goto out;
7892}
7893
7894static size_t max_response_pages(struct nfs_server *server)
7895{
7896 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7897 return nfs_page_array_len(0, max_resp_sz);
7898}
7899
7900static void nfs4_free_pages(struct page **pages, size_t size)
7901{
7902 int i;
7903
7904 if (!pages)
7905 return;
7906
7907 for (i = 0; i < size; i++) {
7908 if (!pages[i])
7909 break;
7910 __free_page(pages[i]);
7911 }
7912 kfree(pages);
7913}
7914
7915static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7916{
7917 struct page **pages;
7918 int i;
7919
7920 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7921 if (!pages) {
7922 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7923 return NULL;
7924 }
7925
7926 for (i = 0; i < size; i++) {
7927 pages[i] = alloc_page(gfp_flags);
7928 if (!pages[i]) {
7929 dprintk("%s: failed to allocate page\n", __func__);
7930 nfs4_free_pages(pages, size);
7931 return NULL;
7932 }
7933 }
7934
7935 return pages;
7936}
7937
7938static void nfs4_layoutget_release(void *calldata)
7939{
7940 struct nfs4_layoutget *lgp = calldata;
7941 struct inode *inode = lgp->args.inode;
7942 struct nfs_server *server = NFS_SERVER(inode);
7943 size_t max_pages = max_response_pages(server);
7944
7945 dprintk("--> %s\n", __func__);
7946 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7947 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7948 put_nfs_open_context(lgp->args.ctx);
7949 kfree(calldata);
7950 dprintk("<-- %s\n", __func__);
7951}
7952
7953static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7954 .rpc_call_prepare = nfs4_layoutget_prepare,
7955 .rpc_call_done = nfs4_layoutget_done,
7956 .rpc_release = nfs4_layoutget_release,
7957};
7958
7959struct pnfs_layout_segment *
7960nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7961{
7962 struct inode *inode = lgp->args.inode;
7963 struct nfs_server *server = NFS_SERVER(inode);
7964 size_t max_pages = max_response_pages(server);
7965 struct rpc_task *task;
7966 struct rpc_message msg = {
7967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7968 .rpc_argp = &lgp->args,
7969 .rpc_resp = &lgp->res,
7970 .rpc_cred = lgp->cred,
7971 };
7972 struct rpc_task_setup task_setup_data = {
7973 .rpc_client = server->client,
7974 .rpc_message = &msg,
7975 .callback_ops = &nfs4_layoutget_call_ops,
7976 .callback_data = lgp,
7977 .flags = RPC_TASK_ASYNC,
7978 };
7979 struct pnfs_layout_segment *lseg = NULL;
7980 int status = 0;
7981
7982 dprintk("--> %s\n", __func__);
7983
7984 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7985 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7986
7987 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7988 if (!lgp->args.layout.pages) {
7989 nfs4_layoutget_release(lgp);
7990 return ERR_PTR(-ENOMEM);
7991 }
7992 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7993 lgp->args.timestamp = jiffies;
7994
7995 lgp->res.layoutp = &lgp->args.layout;
7996 lgp->res.seq_res.sr_slot = NULL;
7997 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7998
7999 task = rpc_run_task(&task_setup_data);
8000 if (IS_ERR(task))
8001 return ERR_CAST(task);
8002 status = nfs4_wait_for_completion_rpc_task(task);
8003 if (status == 0)
8004 status = task->tk_status;
8005 trace_nfs4_layoutget(lgp->args.ctx,
8006 &lgp->args.range,
8007 &lgp->res.range,
8008 &lgp->res.stateid,
8009 status);
8010 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8011 if (status == 0 && lgp->res.layoutp->len)
8012 lseg = pnfs_layout_process(lgp);
8013 rpc_put_task(task);
8014 dprintk("<-- %s status=%d\n", __func__, status);
8015 if (status)
8016 return ERR_PTR(status);
8017 return lseg;
8018}
8019
8020static void
8021nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8022{
8023 struct nfs4_layoutreturn *lrp = calldata;
8024
8025 dprintk("--> %s\n", __func__);
8026 nfs41_setup_sequence(lrp->clp->cl_session,
8027 &lrp->args.seq_args,
8028 &lrp->res.seq_res,
8029 task);
8030}
8031
8032static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8033{
8034 struct nfs4_layoutreturn *lrp = calldata;
8035 struct nfs_server *server;
8036
8037 dprintk("--> %s\n", __func__);
8038
8039 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
8040 return;
8041
8042 server = NFS_SERVER(lrp->args.inode);
8043 switch (task->tk_status) {
8044 default:
8045 task->tk_status = 0;
8046 case 0:
8047 break;
8048 case -NFS4ERR_DELAY:
8049 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8050 break;
8051 rpc_restart_call_prepare(task);
8052 return;
8053 }
8054 dprintk("<-- %s\n", __func__);
8055}
8056
8057static void nfs4_layoutreturn_release(void *calldata)
8058{
8059 struct nfs4_layoutreturn *lrp = calldata;
8060 struct pnfs_layout_hdr *lo = lrp->args.layout;
8061 LIST_HEAD(freeme);
8062
8063 dprintk("--> %s\n", __func__);
8064 spin_lock(&lo->plh_inode->i_lock);
8065 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8066 pnfs_mark_layout_returned_if_empty(lo);
8067 if (lrp->res.lrs_present)
8068 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
8069 pnfs_clear_layoutreturn_waitbit(lo);
8070 spin_unlock(&lo->plh_inode->i_lock);
8071 pnfs_free_lseg_list(&freeme);
8072 pnfs_put_layout_hdr(lrp->args.layout);
8073 nfs_iput_and_deactive(lrp->inode);
8074 kfree(calldata);
8075 dprintk("<-- %s\n", __func__);
8076}
8077
8078static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8079 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8080 .rpc_call_done = nfs4_layoutreturn_done,
8081 .rpc_release = nfs4_layoutreturn_release,
8082};
8083
8084int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8085{
8086 struct rpc_task *task;
8087 struct rpc_message msg = {
8088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8089 .rpc_argp = &lrp->args,
8090 .rpc_resp = &lrp->res,
8091 .rpc_cred = lrp->cred,
8092 };
8093 struct rpc_task_setup task_setup_data = {
8094 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8095 .rpc_message = &msg,
8096 .callback_ops = &nfs4_layoutreturn_call_ops,
8097 .callback_data = lrp,
8098 };
8099 int status = 0;
8100
8101 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8102 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8103 &task_setup_data.rpc_client, &msg);
8104
8105 dprintk("--> %s\n", __func__);
8106 if (!sync) {
8107 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8108 if (!lrp->inode) {
8109 nfs4_layoutreturn_release(lrp);
8110 return -EAGAIN;
8111 }
8112 task_setup_data.flags |= RPC_TASK_ASYNC;
8113 }
8114 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8115 task = rpc_run_task(&task_setup_data);
8116 if (IS_ERR(task))
8117 return PTR_ERR(task);
8118 if (sync)
8119 status = task->tk_status;
8120 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8121 dprintk("<-- %s status=%d\n", __func__, status);
8122 rpc_put_task(task);
8123 return status;
8124}
8125
8126static int
8127_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8128 struct pnfs_device *pdev,
8129 struct rpc_cred *cred)
8130{
8131 struct nfs4_getdeviceinfo_args args = {
8132 .pdev = pdev,
8133 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8134 NOTIFY_DEVICEID4_DELETE,
8135 };
8136 struct nfs4_getdeviceinfo_res res = {
8137 .pdev = pdev,
8138 };
8139 struct rpc_message msg = {
8140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8141 .rpc_argp = &args,
8142 .rpc_resp = &res,
8143 .rpc_cred = cred,
8144 };
8145 int status;
8146
8147 dprintk("--> %s\n", __func__);
8148 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8149 if (res.notification & ~args.notify_types)
8150 dprintk("%s: unsupported notification\n", __func__);
8151 if (res.notification != args.notify_types)
8152 pdev->nocache = 1;
8153
8154 dprintk("<-- %s status=%d\n", __func__, status);
8155
8156 return status;
8157}
8158
8159int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8160 struct pnfs_device *pdev,
8161 struct rpc_cred *cred)
8162{
8163 struct nfs4_exception exception = { };
8164 int err;
8165
8166 do {
8167 err = nfs4_handle_exception(server,
8168 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8169 &exception);
8170 } while (exception.retry);
8171 return err;
8172}
8173EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8174
8175static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8176{
8177 struct nfs4_layoutcommit_data *data = calldata;
8178 struct nfs_server *server = NFS_SERVER(data->args.inode);
8179 struct nfs4_session *session = nfs4_get_session(server);
8180
8181 nfs41_setup_sequence(session,
8182 &data->args.seq_args,
8183 &data->res.seq_res,
8184 task);
8185}
8186
8187static void
8188nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8189{
8190 struct nfs4_layoutcommit_data *data = calldata;
8191 struct nfs_server *server = NFS_SERVER(data->args.inode);
8192
8193 if (!nfs41_sequence_done(task, &data->res.seq_res))
8194 return;
8195
8196 switch (task->tk_status) { /* Just ignore these failures */
8197 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8198 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8199 case -NFS4ERR_BADLAYOUT: /* no layout */
8200 case -NFS4ERR_GRACE: /* loca_recalim always false */
8201 task->tk_status = 0;
8202 case 0:
8203 break;
8204 default:
8205 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8206 rpc_restart_call_prepare(task);
8207 return;
8208 }
8209 }
8210}
8211
8212static void nfs4_layoutcommit_release(void *calldata)
8213{
8214 struct nfs4_layoutcommit_data *data = calldata;
8215
8216 pnfs_cleanup_layoutcommit(data);
8217 nfs_post_op_update_inode_force_wcc(data->args.inode,
8218 data->res.fattr);
8219 put_rpccred(data->cred);
8220 nfs_iput_and_deactive(data->inode);
8221 kfree(data);
8222}
8223
8224static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8225 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8226 .rpc_call_done = nfs4_layoutcommit_done,
8227 .rpc_release = nfs4_layoutcommit_release,
8228};
8229
8230int
8231nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8232{
8233 struct rpc_message msg = {
8234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8235 .rpc_argp = &data->args,
8236 .rpc_resp = &data->res,
8237 .rpc_cred = data->cred,
8238 };
8239 struct rpc_task_setup task_setup_data = {
8240 .task = &data->task,
8241 .rpc_client = NFS_CLIENT(data->args.inode),
8242 .rpc_message = &msg,
8243 .callback_ops = &nfs4_layoutcommit_ops,
8244 .callback_data = data,
8245 };
8246 struct rpc_task *task;
8247 int status = 0;
8248
8249 dprintk("NFS: initiating layoutcommit call. sync %d "
8250 "lbw: %llu inode %lu\n", sync,
8251 data->args.lastbytewritten,
8252 data->args.inode->i_ino);
8253
8254 if (!sync) {
8255 data->inode = nfs_igrab_and_active(data->args.inode);
8256 if (data->inode == NULL) {
8257 nfs4_layoutcommit_release(data);
8258 return -EAGAIN;
8259 }
8260 task_setup_data.flags = RPC_TASK_ASYNC;
8261 }
8262 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8263 task = rpc_run_task(&task_setup_data);
8264 if (IS_ERR(task))
8265 return PTR_ERR(task);
8266 if (sync)
8267 status = task->tk_status;
8268 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8269 dprintk("%s: status %d\n", __func__, status);
8270 rpc_put_task(task);
8271 return status;
8272}
8273
8274/**
8275 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8276 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8277 */
8278static int
8279_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8280 struct nfs_fsinfo *info,
8281 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8282{
8283 struct nfs41_secinfo_no_name_args args = {
8284 .style = SECINFO_STYLE_CURRENT_FH,
8285 };
8286 struct nfs4_secinfo_res res = {
8287 .flavors = flavors,
8288 };
8289 struct rpc_message msg = {
8290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8291 .rpc_argp = &args,
8292 .rpc_resp = &res,
8293 };
8294 struct rpc_clnt *clnt = server->client;
8295 struct rpc_cred *cred = NULL;
8296 int status;
8297
8298 if (use_integrity) {
8299 clnt = server->nfs_client->cl_rpcclient;
8300 cred = nfs4_get_clid_cred(server->nfs_client);
8301 msg.rpc_cred = cred;
8302 }
8303
8304 dprintk("--> %s\n", __func__);
8305 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8306 &res.seq_res, 0);
8307 dprintk("<-- %s status=%d\n", __func__, status);
8308
8309 if (cred)
8310 put_rpccred(cred);
8311
8312 return status;
8313}
8314
8315static int
8316nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8317 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8318{
8319 struct nfs4_exception exception = { };
8320 int err;
8321 do {
8322 /* first try using integrity protection */
8323 err = -NFS4ERR_WRONGSEC;
8324
8325 /* try to use integrity protection with machine cred */
8326 if (_nfs4_is_integrity_protected(server->nfs_client))
8327 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8328 flavors, true);
8329
8330 /*
8331 * if unable to use integrity protection, or SECINFO with
8332 * integrity protection returns NFS4ERR_WRONGSEC (which is
8333 * disallowed by spec, but exists in deployed servers) use
8334 * the current filesystem's rpc_client and the user cred.
8335 */
8336 if (err == -NFS4ERR_WRONGSEC)
8337 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8338 flavors, false);
8339
8340 switch (err) {
8341 case 0:
8342 case -NFS4ERR_WRONGSEC:
8343 case -ENOTSUPP:
8344 goto out;
8345 default:
8346 err = nfs4_handle_exception(server, err, &exception);
8347 }
8348 } while (exception.retry);
8349out:
8350 return err;
8351}
8352
8353static int
8354nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8355 struct nfs_fsinfo *info)
8356{
8357 int err;
8358 struct page *page;
8359 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8360 struct nfs4_secinfo_flavors *flavors;
8361 struct nfs4_secinfo4 *secinfo;
8362 int i;
8363
8364 page = alloc_page(GFP_KERNEL);
8365 if (!page) {
8366 err = -ENOMEM;
8367 goto out;
8368 }
8369
8370 flavors = page_address(page);
8371 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8372
8373 /*
8374 * Fall back on "guess and check" method if
8375 * the server doesn't support SECINFO_NO_NAME
8376 */
8377 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8378 err = nfs4_find_root_sec(server, fhandle, info);
8379 goto out_freepage;
8380 }
8381 if (err)
8382 goto out_freepage;
8383
8384 for (i = 0; i < flavors->num_flavors; i++) {
8385 secinfo = &flavors->flavors[i];
8386
8387 switch (secinfo->flavor) {
8388 case RPC_AUTH_NULL:
8389 case RPC_AUTH_UNIX:
8390 case RPC_AUTH_GSS:
8391 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8392 &secinfo->flavor_info);
8393 break;
8394 default:
8395 flavor = RPC_AUTH_MAXFLAVOR;
8396 break;
8397 }
8398
8399 if (!nfs_auth_info_match(&server->auth_info, flavor))
8400 flavor = RPC_AUTH_MAXFLAVOR;
8401
8402 if (flavor != RPC_AUTH_MAXFLAVOR) {
8403 err = nfs4_lookup_root_sec(server, fhandle,
8404 info, flavor);
8405 if (!err)
8406 break;
8407 }
8408 }
8409
8410 if (flavor == RPC_AUTH_MAXFLAVOR)
8411 err = -EPERM;
8412
8413out_freepage:
8414 put_page(page);
8415 if (err == -EACCES)
8416 return -EPERM;
8417out:
8418 return err;
8419}
8420
8421static int _nfs41_test_stateid(struct nfs_server *server,
8422 nfs4_stateid *stateid,
8423 struct rpc_cred *cred)
8424{
8425 int status;
8426 struct nfs41_test_stateid_args args = {
8427 .stateid = stateid,
8428 };
8429 struct nfs41_test_stateid_res res;
8430 struct rpc_message msg = {
8431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8432 .rpc_argp = &args,
8433 .rpc_resp = &res,
8434 .rpc_cred = cred,
8435 };
8436 struct rpc_clnt *rpc_client = server->client;
8437
8438 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8439 &rpc_client, &msg);
8440
8441 dprintk("NFS call test_stateid %p\n", stateid);
8442 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8443 nfs4_set_sequence_privileged(&args.seq_args);
8444 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8445 &args.seq_args, &res.seq_res);
8446 if (status != NFS_OK) {
8447 dprintk("NFS reply test_stateid: failed, %d\n", status);
8448 return status;
8449 }
8450 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8451 return -res.status;
8452}
8453
8454/**
8455 * nfs41_test_stateid - perform a TEST_STATEID operation
8456 *
8457 * @server: server / transport on which to perform the operation
8458 * @stateid: state ID to test
8459 * @cred: credential
8460 *
8461 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8462 * Otherwise a negative NFS4ERR value is returned if the operation
8463 * failed or the state ID is not currently valid.
8464 */
8465static int nfs41_test_stateid(struct nfs_server *server,
8466 nfs4_stateid *stateid,
8467 struct rpc_cred *cred)
8468{
8469 struct nfs4_exception exception = { };
8470 int err;
8471 do {
8472 err = _nfs41_test_stateid(server, stateid, cred);
8473 if (err != -NFS4ERR_DELAY)
8474 break;
8475 nfs4_handle_exception(server, err, &exception);
8476 } while (exception.retry);
8477 return err;
8478}
8479
8480struct nfs_free_stateid_data {
8481 struct nfs_server *server;
8482 struct nfs41_free_stateid_args args;
8483 struct nfs41_free_stateid_res res;
8484};
8485
8486static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8487{
8488 struct nfs_free_stateid_data *data = calldata;
8489 nfs41_setup_sequence(nfs4_get_session(data->server),
8490 &data->args.seq_args,
8491 &data->res.seq_res,
8492 task);
8493}
8494
8495static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8496{
8497 struct nfs_free_stateid_data *data = calldata;
8498
8499 nfs41_sequence_done(task, &data->res.seq_res);
8500
8501 switch (task->tk_status) {
8502 case -NFS4ERR_DELAY:
8503 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8504 rpc_restart_call_prepare(task);
8505 }
8506}
8507
8508static void nfs41_free_stateid_release(void *calldata)
8509{
8510 kfree(calldata);
8511}
8512
8513static const struct rpc_call_ops nfs41_free_stateid_ops = {
8514 .rpc_call_prepare = nfs41_free_stateid_prepare,
8515 .rpc_call_done = nfs41_free_stateid_done,
8516 .rpc_release = nfs41_free_stateid_release,
8517};
8518
8519static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8520 nfs4_stateid *stateid,
8521 struct rpc_cred *cred,
8522 bool privileged)
8523{
8524 struct rpc_message msg = {
8525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8526 .rpc_cred = cred,
8527 };
8528 struct rpc_task_setup task_setup = {
8529 .rpc_client = server->client,
8530 .rpc_message = &msg,
8531 .callback_ops = &nfs41_free_stateid_ops,
8532 .flags = RPC_TASK_ASYNC,
8533 };
8534 struct nfs_free_stateid_data *data;
8535
8536 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8537 &task_setup.rpc_client, &msg);
8538
8539 dprintk("NFS call free_stateid %p\n", stateid);
8540 data = kmalloc(sizeof(*data), GFP_NOFS);
8541 if (!data)
8542 return ERR_PTR(-ENOMEM);
8543 data->server = server;
8544 nfs4_stateid_copy(&data->args.stateid, stateid);
8545
8546 task_setup.callback_data = data;
8547
8548 msg.rpc_argp = &data->args;
8549 msg.rpc_resp = &data->res;
8550 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8551 if (privileged)
8552 nfs4_set_sequence_privileged(&data->args.seq_args);
8553
8554 return rpc_run_task(&task_setup);
8555}
8556
8557/**
8558 * nfs41_free_stateid - perform a FREE_STATEID operation
8559 *
8560 * @server: server / transport on which to perform the operation
8561 * @stateid: state ID to release
8562 * @cred: credential
8563 *
8564 * Returns NFS_OK if the server freed "stateid". Otherwise a
8565 * negative NFS4ERR value is returned.
8566 */
8567static int nfs41_free_stateid(struct nfs_server *server,
8568 nfs4_stateid *stateid,
8569 struct rpc_cred *cred)
8570{
8571 struct rpc_task *task;
8572 int ret;
8573
8574 task = _nfs41_free_stateid(server, stateid, cred, true);
8575 if (IS_ERR(task))
8576 return PTR_ERR(task);
8577 ret = rpc_wait_for_completion_task(task);
8578 if (!ret)
8579 ret = task->tk_status;
8580 rpc_put_task(task);
8581 return ret;
8582}
8583
8584static void
8585nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8586{
8587 struct rpc_task *task;
8588 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8589
8590 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8591 nfs4_free_lock_state(server, lsp);
8592 if (IS_ERR(task))
8593 return;
8594 rpc_put_task(task);
8595}
8596
8597static bool nfs41_match_stateid(const nfs4_stateid *s1,
8598 const nfs4_stateid *s2)
8599{
8600 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8601 return false;
8602
8603 if (s1->seqid == s2->seqid)
8604 return true;
8605 if (s1->seqid == 0 || s2->seqid == 0)
8606 return true;
8607
8608 return false;
8609}
8610
8611#endif /* CONFIG_NFS_V4_1 */
8612
8613static bool nfs4_match_stateid(const nfs4_stateid *s1,
8614 const nfs4_stateid *s2)
8615{
8616 return nfs4_stateid_match(s1, s2);
8617}
8618
8619
8620static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8621 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8622 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8623 .recover_open = nfs4_open_reclaim,
8624 .recover_lock = nfs4_lock_reclaim,
8625 .establish_clid = nfs4_init_clientid,
8626 .detect_trunking = nfs40_discover_server_trunking,
8627};
8628
8629#if defined(CONFIG_NFS_V4_1)
8630static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8631 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8632 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8633 .recover_open = nfs4_open_reclaim,
8634 .recover_lock = nfs4_lock_reclaim,
8635 .establish_clid = nfs41_init_clientid,
8636 .reclaim_complete = nfs41_proc_reclaim_complete,
8637 .detect_trunking = nfs41_discover_server_trunking,
8638};
8639#endif /* CONFIG_NFS_V4_1 */
8640
8641static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8642 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8643 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8644 .recover_open = nfs40_open_expired,
8645 .recover_lock = nfs4_lock_expired,
8646 .establish_clid = nfs4_init_clientid,
8647};
8648
8649#if defined(CONFIG_NFS_V4_1)
8650static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8651 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8652 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8653 .recover_open = nfs41_open_expired,
8654 .recover_lock = nfs41_lock_expired,
8655 .establish_clid = nfs41_init_clientid,
8656};
8657#endif /* CONFIG_NFS_V4_1 */
8658
8659static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8660 .sched_state_renewal = nfs4_proc_async_renew,
8661 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8662 .renew_lease = nfs4_proc_renew,
8663};
8664
8665#if defined(CONFIG_NFS_V4_1)
8666static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8667 .sched_state_renewal = nfs41_proc_async_sequence,
8668 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8669 .renew_lease = nfs4_proc_sequence,
8670};
8671#endif
8672
8673static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8674 .get_locations = _nfs40_proc_get_locations,
8675 .fsid_present = _nfs40_proc_fsid_present,
8676};
8677
8678#if defined(CONFIG_NFS_V4_1)
8679static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8680 .get_locations = _nfs41_proc_get_locations,
8681 .fsid_present = _nfs41_proc_fsid_present,
8682};
8683#endif /* CONFIG_NFS_V4_1 */
8684
8685static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8686 .minor_version = 0,
8687 .init_caps = NFS_CAP_READDIRPLUS
8688 | NFS_CAP_ATOMIC_OPEN
8689 | NFS_CAP_POSIX_LOCK,
8690 .init_client = nfs40_init_client,
8691 .shutdown_client = nfs40_shutdown_client,
8692 .match_stateid = nfs4_match_stateid,
8693 .find_root_sec = nfs4_find_root_sec,
8694 .free_lock_state = nfs4_release_lockowner,
8695 .alloc_seqid = nfs_alloc_seqid,
8696 .call_sync_ops = &nfs40_call_sync_ops,
8697 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8698 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8699 .state_renewal_ops = &nfs40_state_renewal_ops,
8700 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8701};
8702
8703#if defined(CONFIG_NFS_V4_1)
8704static struct nfs_seqid *
8705nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8706{
8707 return NULL;
8708}
8709
8710static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8711 .minor_version = 1,
8712 .init_caps = NFS_CAP_READDIRPLUS
8713 | NFS_CAP_ATOMIC_OPEN
8714 | NFS_CAP_POSIX_LOCK
8715 | NFS_CAP_STATEID_NFSV41
8716 | NFS_CAP_ATOMIC_OPEN_V1,
8717 .init_client = nfs41_init_client,
8718 .shutdown_client = nfs41_shutdown_client,
8719 .match_stateid = nfs41_match_stateid,
8720 .find_root_sec = nfs41_find_root_sec,
8721 .free_lock_state = nfs41_free_lock_state,
8722 .alloc_seqid = nfs_alloc_no_seqid,
8723 .call_sync_ops = &nfs41_call_sync_ops,
8724 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8725 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8726 .state_renewal_ops = &nfs41_state_renewal_ops,
8727 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8728};
8729#endif
8730
8731#if defined(CONFIG_NFS_V4_2)
8732static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8733 .minor_version = 2,
8734 .init_caps = NFS_CAP_READDIRPLUS
8735 | NFS_CAP_ATOMIC_OPEN
8736 | NFS_CAP_POSIX_LOCK
8737 | NFS_CAP_STATEID_NFSV41
8738 | NFS_CAP_ATOMIC_OPEN_V1
8739 | NFS_CAP_ALLOCATE
8740 | NFS_CAP_DEALLOCATE
8741 | NFS_CAP_SEEK
8742 | NFS_CAP_LAYOUTSTATS
8743 | NFS_CAP_CLONE,
8744 .init_client = nfs41_init_client,
8745 .shutdown_client = nfs41_shutdown_client,
8746 .match_stateid = nfs41_match_stateid,
8747 .find_root_sec = nfs41_find_root_sec,
8748 .free_lock_state = nfs41_free_lock_state,
8749 .call_sync_ops = &nfs41_call_sync_ops,
8750 .alloc_seqid = nfs_alloc_no_seqid,
8751 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8752 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8753 .state_renewal_ops = &nfs41_state_renewal_ops,
8754 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8755};
8756#endif
8757
8758const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8759 [0] = &nfs_v4_0_minor_ops,
8760#if defined(CONFIG_NFS_V4_1)
8761 [1] = &nfs_v4_1_minor_ops,
8762#endif
8763#if defined(CONFIG_NFS_V4_2)
8764 [2] = &nfs_v4_2_minor_ops,
8765#endif
8766};
8767
8768ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8769{
8770 ssize_t error, error2;
8771
8772 error = generic_listxattr(dentry, list, size);
8773 if (error < 0)
8774 return error;
8775 if (list) {
8776 list += error;
8777 size -= error;
8778 }
8779
8780 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8781 if (error2 < 0)
8782 return error2;
8783 return error + error2;
8784}
8785
8786static const struct inode_operations nfs4_dir_inode_operations = {
8787 .create = nfs_create,
8788 .lookup = nfs_lookup,
8789 .atomic_open = nfs_atomic_open,
8790 .link = nfs_link,
8791 .unlink = nfs_unlink,
8792 .symlink = nfs_symlink,
8793 .mkdir = nfs_mkdir,
8794 .rmdir = nfs_rmdir,
8795 .mknod = nfs_mknod,
8796 .rename = nfs_rename,
8797 .permission = nfs_permission,
8798 .getattr = nfs_getattr,
8799 .setattr = nfs_setattr,
8800 .getxattr = generic_getxattr,
8801 .setxattr = generic_setxattr,
8802 .listxattr = nfs4_listxattr,
8803 .removexattr = generic_removexattr,
8804};
8805
8806static const struct inode_operations nfs4_file_inode_operations = {
8807 .permission = nfs_permission,
8808 .getattr = nfs_getattr,
8809 .setattr = nfs_setattr,
8810 .getxattr = generic_getxattr,
8811 .setxattr = generic_setxattr,
8812 .listxattr = nfs4_listxattr,
8813 .removexattr = generic_removexattr,
8814};
8815
8816const struct nfs_rpc_ops nfs_v4_clientops = {
8817 .version = 4, /* protocol version */
8818 .dentry_ops = &nfs4_dentry_operations,
8819 .dir_inode_ops = &nfs4_dir_inode_operations,
8820 .file_inode_ops = &nfs4_file_inode_operations,
8821 .file_ops = &nfs4_file_operations,
8822 .getroot = nfs4_proc_get_root,
8823 .submount = nfs4_submount,
8824 .try_mount = nfs4_try_mount,
8825 .getattr = nfs4_proc_getattr,
8826 .setattr = nfs4_proc_setattr,
8827 .lookup = nfs4_proc_lookup,
8828 .access = nfs4_proc_access,
8829 .readlink = nfs4_proc_readlink,
8830 .create = nfs4_proc_create,
8831 .remove = nfs4_proc_remove,
8832 .unlink_setup = nfs4_proc_unlink_setup,
8833 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8834 .unlink_done = nfs4_proc_unlink_done,
8835 .rename_setup = nfs4_proc_rename_setup,
8836 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8837 .rename_done = nfs4_proc_rename_done,
8838 .link = nfs4_proc_link,
8839 .symlink = nfs4_proc_symlink,
8840 .mkdir = nfs4_proc_mkdir,
8841 .rmdir = nfs4_proc_remove,
8842 .readdir = nfs4_proc_readdir,
8843 .mknod = nfs4_proc_mknod,
8844 .statfs = nfs4_proc_statfs,
8845 .fsinfo = nfs4_proc_fsinfo,
8846 .pathconf = nfs4_proc_pathconf,
8847 .set_capabilities = nfs4_server_capabilities,
8848 .decode_dirent = nfs4_decode_dirent,
8849 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8850 .read_setup = nfs4_proc_read_setup,
8851 .read_done = nfs4_read_done,
8852 .write_setup = nfs4_proc_write_setup,
8853 .write_done = nfs4_write_done,
8854 .commit_setup = nfs4_proc_commit_setup,
8855 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8856 .commit_done = nfs4_commit_done,
8857 .lock = nfs4_proc_lock,
8858 .clear_acl_cache = nfs4_zap_acl_attr,
8859 .close_context = nfs4_close_context,
8860 .open_context = nfs4_atomic_open,
8861 .have_delegation = nfs4_have_delegation,
8862 .return_delegation = nfs4_inode_return_delegation,
8863 .alloc_client = nfs4_alloc_client,
8864 .init_client = nfs4_init_client,
8865 .free_client = nfs4_free_client,
8866 .create_server = nfs4_create_server,
8867 .clone_server = nfs_clone_server,
8868};
8869
8870static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8871 .name = XATTR_NAME_NFSV4_ACL,
8872 .list = nfs4_xattr_list_nfs4_acl,
8873 .get = nfs4_xattr_get_nfs4_acl,
8874 .set = nfs4_xattr_set_nfs4_acl,
8875};
8876
8877const struct xattr_handler *nfs4_xattr_handlers[] = {
8878 &nfs4_xattr_nfs4_acl_handler,
8879#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8880 &nfs4_xattr_nfs4_label_handler,
8881#endif
8882 NULL
8883};
8884
8885/*
8886 * Local variables:
8887 * c-basic-offset: 8
8888 * End:
8889 */
Linux 6.x block layer and io_uring tree(s)