projects / linux-2.6-block.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
NFSv3: Ensure that do_proc_get_root() reports errors correctly
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
... / ...
CommitLineData
1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/ratelimit.h>
43#include <linux/printk.h>
44#include <linux/slab.h>
45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
50#include <linux/nfs_mount.h>
51#include <linux/namei.h>
52#include <linux/mount.h>
53#include <linux/module.h>
54#include <linux/nfs_idmap.h>
55#include <linux/sunrpc/bc_xprt.h>
56#include <linux/xattr.h>
57#include <linux/utsname.h>
58#include <linux/freezer.h>
59
60#include "nfs4_fs.h"
61#include "delegation.h"
62#include "internal.h"
63#include "iostat.h"
64#include "callback.h"
65#include "pnfs.h"
66#include "netns.h"
67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
70#define NFS4_POLL_RETRY_MIN (HZ/10)
71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
75struct nfs4_opendata;
76static int _nfs4_proc_open(struct nfs4_opendata *data);
77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86#ifdef CONFIG_NFS_V4_1
87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89#endif
90/* Prevent leaks of NFSv4 errors into userland */
91static int nfs4_map_errors(int err)
92{
93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
107 default:
108 dprintk("%s could not handle NFSv4 error %d\n",
109 __func__, -err);
110 break;
111 }
112 return -EIO;
113}
114
115/*
116 * This is our standard bitmap for GETATTR requests.
117 */
118const u32 nfs4_fattr_bitmap[3] = {
119 FATTR4_WORD0_TYPE
120 | FATTR4_WORD0_CHANGE
121 | FATTR4_WORD0_SIZE
122 | FATTR4_WORD0_FSID
123 | FATTR4_WORD0_FILEID,
124 FATTR4_WORD1_MODE
125 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
133};
134
135static const u32 nfs4_pnfs_open_bitmap[3] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID,
141 FATTR4_WORD1_MODE
142 | FATTR4_WORD1_NUMLINKS
143 | FATTR4_WORD1_OWNER
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY,
150 FATTR4_WORD2_MDSTHRESHOLD
151};
152
153const u32 nfs4_statfs_bitmap[2] = {
154 FATTR4_WORD0_FILES_AVAIL
155 | FATTR4_WORD0_FILES_FREE
156 | FATTR4_WORD0_FILES_TOTAL,
157 FATTR4_WORD1_SPACE_AVAIL
158 | FATTR4_WORD1_SPACE_FREE
159 | FATTR4_WORD1_SPACE_TOTAL
160};
161
162const u32 nfs4_pathconf_bitmap[2] = {
163 FATTR4_WORD0_MAXLINK
164 | FATTR4_WORD0_MAXNAME,
165 0
166};
167
168const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
169 | FATTR4_WORD0_MAXREAD
170 | FATTR4_WORD0_MAXWRITE
171 | FATTR4_WORD0_LEASE_TIME,
172 FATTR4_WORD1_TIME_DELTA
173 | FATTR4_WORD1_FS_LAYOUT_TYPES,
174 FATTR4_WORD2_LAYOUT_BLKSIZE
175};
176
177const u32 nfs4_fs_locations_bitmap[2] = {
178 FATTR4_WORD0_TYPE
179 | FATTR4_WORD0_CHANGE
180 | FATTR4_WORD0_SIZE
181 | FATTR4_WORD0_FSID
182 | FATTR4_WORD0_FILEID
183 | FATTR4_WORD0_FS_LOCATIONS,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
192 | FATTR4_WORD1_TIME_MODIFY
193 | FATTR4_WORD1_MOUNTED_ON_FILEID
194};
195
196static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
197 struct nfs4_readdir_arg *readdir)
198{
199 __be32 *start, *p;
200
201 BUG_ON(readdir->count < 80);
202 if (cookie > 2) {
203 readdir->cookie = cookie;
204 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
205 return;
206 }
207
208 readdir->cookie = 0;
209 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
210 if (cookie == 2)
211 return;
212
213 /*
214 * NFSv4 servers do not return entries for '.' and '..'
215 * Therefore, we fake these entries here. We let '.'
216 * have cookie 0 and '..' have cookie 1. Note that
217 * when talking to the server, we always send cookie 0
218 * instead of 1 or 2.
219 */
220 start = p = kmap_atomic(*readdir->pages);
221
222 if (cookie == 0) {
223 *p++ = xdr_one; /* next */
224 *p++ = xdr_zero; /* cookie, first word */
225 *p++ = xdr_one; /* cookie, second word */
226 *p++ = xdr_one; /* entry len */
227 memcpy(p, ".\0\0\0", 4); /* entry */
228 p++;
229 *p++ = xdr_one; /* bitmap length */
230 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
231 *p++ = htonl(8); /* attribute buffer length */
232 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
233 }
234
235 *p++ = xdr_one; /* next */
236 *p++ = xdr_zero; /* cookie, first word */
237 *p++ = xdr_two; /* cookie, second word */
238 *p++ = xdr_two; /* entry len */
239 memcpy(p, "..\0\0", 4); /* entry */
240 p++;
241 *p++ = xdr_one; /* bitmap length */
242 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
243 *p++ = htonl(8); /* attribute buffer length */
244 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
245
246 readdir->pgbase = (char *)p - (char *)start;
247 readdir->count -= readdir->pgbase;
248 kunmap_atomic(start);
249}
250
251static int nfs4_wait_clnt_recover(struct nfs_client *clp)
252{
253 int res;
254
255 might_sleep();
256
257 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
258 nfs_wait_bit_killable, TASK_KILLABLE);
259 if (res)
260 return res;
261
262 if (clp->cl_cons_state < 0)
263 return clp->cl_cons_state;
264 return 0;
265}
266
267static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
268{
269 int res = 0;
270
271 might_sleep();
272
273 if (*timeout <= 0)
274 *timeout = NFS4_POLL_RETRY_MIN;
275 if (*timeout > NFS4_POLL_RETRY_MAX)
276 *timeout = NFS4_POLL_RETRY_MAX;
277 freezable_schedule_timeout_killable(*timeout);
278 if (fatal_signal_pending(current))
279 res = -ERESTARTSYS;
280 *timeout <<= 1;
281 return res;
282}
283
284/* This is the error handling routine for processes that are allowed
285 * to sleep.
286 */
287static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
288{
289 struct nfs_client *clp = server->nfs_client;
290 struct nfs4_state *state = exception->state;
291 struct inode *inode = exception->inode;
292 int ret = errorcode;
293
294 exception->retry = 0;
295 switch(errorcode) {
296 case 0:
297 return 0;
298 case -NFS4ERR_OPENMODE:
299 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
300 nfs4_inode_return_delegation(inode);
301 exception->retry = 1;
302 return 0;
303 }
304 if (state == NULL)
305 break;
306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
308 case -NFS4ERR_DELEG_REVOKED:
309 case -NFS4ERR_ADMIN_REVOKED:
310 case -NFS4ERR_BAD_STATEID:
311 if (state == NULL)
312 break;
313 nfs_remove_bad_delegation(state->inode);
314 nfs4_schedule_stateid_recovery(server, state);
315 goto wait_on_recovery;
316 case -NFS4ERR_EXPIRED:
317 if (state != NULL)
318 nfs4_schedule_stateid_recovery(server, state);
319 case -NFS4ERR_STALE_STATEID:
320 case -NFS4ERR_STALE_CLIENTID:
321 nfs4_schedule_lease_recovery(clp);
322 goto wait_on_recovery;
323#if defined(CONFIG_NFS_V4_1)
324 case -NFS4ERR_BADSESSION:
325 case -NFS4ERR_BADSLOT:
326 case -NFS4ERR_BAD_HIGH_SLOT:
327 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
328 case -NFS4ERR_DEADSESSION:
329 case -NFS4ERR_SEQ_FALSE_RETRY:
330 case -NFS4ERR_SEQ_MISORDERED:
331 dprintk("%s ERROR: %d Reset session\n", __func__,
332 errorcode);
333 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
334 exception->retry = 1;
335 break;
336#endif /* defined(CONFIG_NFS_V4_1) */
337 case -NFS4ERR_FILE_OPEN:
338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
347 case -EKEYEXPIRED:
348 ret = nfs4_delay(server->client, &exception->timeout);
349 if (ret != 0)
350 break;
351 case -NFS4ERR_RETRY_UNCACHED_REP:
352 case -NFS4ERR_OLD_STATEID:
353 exception->retry = 1;
354 break;
355 case -NFS4ERR_BADOWNER:
356 /* The following works around a Linux server bug! */
357 case -NFS4ERR_BADNAME:
358 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
359 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
360 exception->retry = 1;
361 printk(KERN_WARNING "NFS: v4 server %s "
362 "does not accept raw "
363 "uid/gids. "
364 "Reenabling the idmapper.\n",
365 server->nfs_client->cl_hostname);
366 }
367 }
368 /* We failed to handle the error */
369 return nfs4_map_errors(ret);
370wait_on_recovery:
371 ret = nfs4_wait_clnt_recover(clp);
372 if (ret == 0)
373 exception->retry = 1;
374 return ret;
375}
376
377
378static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
379{
380 spin_lock(&clp->cl_lock);
381 if (time_before(clp->cl_last_renewal,timestamp))
382 clp->cl_last_renewal = timestamp;
383 spin_unlock(&clp->cl_lock);
384}
385
386static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
387{
388 do_renew_lease(server->nfs_client, timestamp);
389}
390
391#if defined(CONFIG_NFS_V4_1)
392
393/*
394 * nfs4_free_slot - free a slot and efficiently update slot table.
395 *
396 * freeing a slot is trivially done by clearing its respective bit
397 * in the bitmap.
398 * If the freed slotid equals highest_used_slotid we want to update it
399 * so that the server would be able to size down the slot table if needed,
400 * otherwise we know that the highest_used_slotid is still in use.
401 * When updating highest_used_slotid there may be "holes" in the bitmap
402 * so we need to scan down from highest_used_slotid to 0 looking for the now
403 * highest slotid in use.
404 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
405 *
406 * Must be called while holding tbl->slot_tbl_lock
407 */
408static void
409nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
410{
411 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
412 /* clear used bit in bitmap */
413 __clear_bit(slotid, tbl->used_slots);
414
415 /* update highest_used_slotid when it is freed */
416 if (slotid == tbl->highest_used_slotid) {
417 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
418 if (slotid < tbl->max_slots)
419 tbl->highest_used_slotid = slotid;
420 else
421 tbl->highest_used_slotid = NFS4_NO_SLOT;
422 }
423 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
424 slotid, tbl->highest_used_slotid);
425}
426
427bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
428{
429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
430 return true;
431}
432
433/*
434 * Signal state manager thread if session fore channel is drained
435 */
436static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
437{
438 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
439 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
440 nfs4_set_task_privileged, NULL);
441 return;
442 }
443
444 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
445 return;
446
447 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
448 complete(&ses->fc_slot_table.complete);
449}
450
451/*
452 * Signal state manager thread if session back channel is drained
453 */
454void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
455{
456 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
457 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
458 return;
459 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
460 complete(&ses->bc_slot_table.complete);
461}
462
463static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
464{
465 struct nfs4_slot_table *tbl;
466
467 tbl = &res->sr_session->fc_slot_table;
468 if (!res->sr_slot) {
469 /* just wake up the next guy waiting since
470 * we may have not consumed a slot after all */
471 dprintk("%s: No slot\n", __func__);
472 return;
473 }
474
475 spin_lock(&tbl->slot_tbl_lock);
476 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
477 nfs4_check_drain_fc_complete(res->sr_session);
478 spin_unlock(&tbl->slot_tbl_lock);
479 res->sr_slot = NULL;
480}
481
482static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
483{
484 unsigned long timestamp;
485 struct nfs_client *clp;
486
487 /*
488 * sr_status remains 1 if an RPC level error occurred. The server
489 * may or may not have processed the sequence operation..
490 * Proceed as if the server received and processed the sequence
491 * operation.
492 */
493 if (res->sr_status == 1)
494 res->sr_status = NFS_OK;
495
496 /* don't increment the sequence number if the task wasn't sent */
497 if (!RPC_WAS_SENT(task))
498 goto out;
499
500 /* Check the SEQUENCE operation status */
501 switch (res->sr_status) {
502 case 0:
503 /* Update the slot's sequence and clientid lease timer */
504 ++res->sr_slot->seq_nr;
505 timestamp = res->sr_renewal_time;
506 clp = res->sr_session->clp;
507 do_renew_lease(clp, timestamp);
508 /* Check sequence flags */
509 if (res->sr_status_flags != 0)
510 nfs4_schedule_lease_recovery(clp);
511 break;
512 case -NFS4ERR_DELAY:
513 /* The server detected a resend of the RPC call and
514 * returned NFS4ERR_DELAY as per Section 2.10.6.2
515 * of RFC5661.
516 */
517 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
518 __func__,
519 res->sr_slot - res->sr_session->fc_slot_table.slots,
520 res->sr_slot->seq_nr);
521 goto out_retry;
522 default:
523 /* Just update the slot sequence no. */
524 ++res->sr_slot->seq_nr;
525 }
526out:
527 /* The session may be reset by one of the error handlers. */
528 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
529 nfs41_sequence_free_slot(res);
530 return 1;
531out_retry:
532 if (!rpc_restart_call(task))
533 goto out;
534 rpc_delay(task, NFS4_POLL_RETRY_MAX);
535 return 0;
536}
537
538static int nfs4_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 if (res->sr_session == NULL)
542 return 1;
543 return nfs41_sequence_done(task, res);
544}
545
546/*
547 * nfs4_find_slot - efficiently look for a free slot
548 *
549 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
550 * If found, we mark the slot as used, update the highest_used_slotid,
551 * and respectively set up the sequence operation args.
552 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
553 *
554 * Note: must be called with under the slot_tbl_lock.
555 */
556static u32
557nfs4_find_slot(struct nfs4_slot_table *tbl)
558{
559 u32 slotid;
560 u32 ret_id = NFS4_NO_SLOT;
561
562 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
563 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
564 tbl->max_slots);
565 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
566 if (slotid >= tbl->max_slots)
567 goto out;
568 __set_bit(slotid, tbl->used_slots);
569 if (slotid > tbl->highest_used_slotid ||
570 tbl->highest_used_slotid == NFS4_NO_SLOT)
571 tbl->highest_used_slotid = slotid;
572 ret_id = slotid;
573out:
574 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
575 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
576 return ret_id;
577}
578
579static void nfs41_init_sequence(struct nfs4_sequence_args *args,
580 struct nfs4_sequence_res *res, int cache_reply)
581{
582 args->sa_session = NULL;
583 args->sa_cache_this = 0;
584 if (cache_reply)
585 args->sa_cache_this = 1;
586 res->sr_session = NULL;
587 res->sr_slot = NULL;
588}
589
590int nfs41_setup_sequence(struct nfs4_session *session,
591 struct nfs4_sequence_args *args,
592 struct nfs4_sequence_res *res,
593 struct rpc_task *task)
594{
595 struct nfs4_slot *slot;
596 struct nfs4_slot_table *tbl;
597 u32 slotid;
598
599 dprintk("--> %s\n", __func__);
600 /* slot already allocated? */
601 if (res->sr_slot != NULL)
602 return 0;
603
604 tbl = &session->fc_slot_table;
605
606 spin_lock(&tbl->slot_tbl_lock);
607 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
608 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
609 /* The state manager will wait until the slot table is empty */
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
611 spin_unlock(&tbl->slot_tbl_lock);
612 dprintk("%s session is draining\n", __func__);
613 return -EAGAIN;
614 }
615
616 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
617 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
618 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
619 spin_unlock(&tbl->slot_tbl_lock);
620 dprintk("%s enforce FIFO order\n", __func__);
621 return -EAGAIN;
622 }
623
624 slotid = nfs4_find_slot(tbl);
625 if (slotid == NFS4_NO_SLOT) {
626 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
627 spin_unlock(&tbl->slot_tbl_lock);
628 dprintk("<-- %s: no free slots\n", __func__);
629 return -EAGAIN;
630 }
631 spin_unlock(&tbl->slot_tbl_lock);
632
633 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
634 slot = tbl->slots + slotid;
635 args->sa_session = session;
636 args->sa_slotid = slotid;
637
638 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
639
640 res->sr_session = session;
641 res->sr_slot = slot;
642 res->sr_renewal_time = jiffies;
643 res->sr_status_flags = 0;
644 /*
645 * sr_status is only set in decode_sequence, and so will remain
646 * set to 1 if an rpc level failure occurs.
647 */
648 res->sr_status = 1;
649 return 0;
650}
651EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
652
653int nfs4_setup_sequence(const struct nfs_server *server,
654 struct nfs4_sequence_args *args,
655 struct nfs4_sequence_res *res,
656 struct rpc_task *task)
657{
658 struct nfs4_session *session = nfs4_get_session(server);
659 int ret = 0;
660
661 if (session == NULL)
662 goto out;
663
664 dprintk("--> %s clp %p session %p sr_slot %td\n",
665 __func__, session->clp, session, res->sr_slot ?
666 res->sr_slot - session->fc_slot_table.slots : -1);
667
668 ret = nfs41_setup_sequence(session, args, res, task);
669out:
670 dprintk("<-- %s status=%d\n", __func__, ret);
671 return ret;
672}
673
674struct nfs41_call_sync_data {
675 const struct nfs_server *seq_server;
676 struct nfs4_sequence_args *seq_args;
677 struct nfs4_sequence_res *seq_res;
678};
679
680static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
681{
682 struct nfs41_call_sync_data *data = calldata;
683
684 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
685
686 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
687 data->seq_res, task))
688 return;
689 rpc_call_start(task);
690}
691
692static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
693{
694 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
695 nfs41_call_sync_prepare(task, calldata);
696}
697
698static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
699{
700 struct nfs41_call_sync_data *data = calldata;
701
702 nfs41_sequence_done(task, data->seq_res);
703}
704
705static const struct rpc_call_ops nfs41_call_sync_ops = {
706 .rpc_call_prepare = nfs41_call_sync_prepare,
707 .rpc_call_done = nfs41_call_sync_done,
708};
709
710static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
711 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
712 .rpc_call_done = nfs41_call_sync_done,
713};
714
715static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
716 struct nfs_server *server,
717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
719 struct nfs4_sequence_res *res,
720 int privileged)
721{
722 int ret;
723 struct rpc_task *task;
724 struct nfs41_call_sync_data data = {
725 .seq_server = server,
726 .seq_args = args,
727 .seq_res = res,
728 };
729 struct rpc_task_setup task_setup = {
730 .rpc_client = clnt,
731 .rpc_message = msg,
732 .callback_ops = &nfs41_call_sync_ops,
733 .callback_data = &data
734 };
735
736 if (privileged)
737 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
738 task = rpc_run_task(&task_setup);
739 if (IS_ERR(task))
740 ret = PTR_ERR(task);
741 else {
742 ret = task->tk_status;
743 rpc_put_task(task);
744 }
745 return ret;
746}
747
748int _nfs4_call_sync_session(struct rpc_clnt *clnt,
749 struct nfs_server *server,
750 struct rpc_message *msg,
751 struct nfs4_sequence_args *args,
752 struct nfs4_sequence_res *res,
753 int cache_reply)
754{
755 nfs41_init_sequence(args, res, cache_reply);
756 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
757}
758
759#else
760static inline
761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
766static int nfs4_sequence_done(struct rpc_task *task,
767 struct nfs4_sequence_res *res)
768{
769 return 1;
770}
771#endif /* CONFIG_NFS_V4_1 */
772
773int _nfs4_call_sync(struct rpc_clnt *clnt,
774 struct nfs_server *server,
775 struct rpc_message *msg,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
778 int cache_reply)
779{
780 nfs41_init_sequence(args, res, cache_reply);
781 return rpc_call_sync(clnt, msg, 0);
782}
783
784static inline
785int nfs4_call_sync(struct rpc_clnt *clnt,
786 struct nfs_server *server,
787 struct rpc_message *msg,
788 struct nfs4_sequence_args *args,
789 struct nfs4_sequence_res *res,
790 int cache_reply)
791{
792 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
793 args, res, cache_reply);
794}
795
796static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
797{
798 struct nfs_inode *nfsi = NFS_I(dir);
799
800 spin_lock(&dir->i_lock);
801 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
802 if (!cinfo->atomic || cinfo->before != dir->i_version)
803 nfs_force_lookup_revalidate(dir);
804 dir->i_version = cinfo->after;
805 spin_unlock(&dir->i_lock);
806}
807
808struct nfs4_opendata {
809 struct kref kref;
810 struct nfs_openargs o_arg;
811 struct nfs_openres o_res;
812 struct nfs_open_confirmargs c_arg;
813 struct nfs_open_confirmres c_res;
814 struct nfs4_string owner_name;
815 struct nfs4_string group_name;
816 struct nfs_fattr f_attr;
817 struct dentry *dir;
818 struct dentry *dentry;
819 struct nfs4_state_owner *owner;
820 struct nfs4_state *state;
821 struct iattr attrs;
822 unsigned long timestamp;
823 unsigned int rpc_done : 1;
824 int rpc_status;
825 int cancelled;
826};
827
828
829static void nfs4_init_opendata_res(struct nfs4_opendata *p)
830{
831 p->o_res.f_attr = &p->f_attr;
832 p->o_res.seqid = p->o_arg.seqid;
833 p->c_res.seqid = p->c_arg.seqid;
834 p->o_res.server = p->o_arg.server;
835 nfs_fattr_init(&p->f_attr);
836 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
837}
838
839static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
840 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
841 const struct iattr *attrs,
842 gfp_t gfp_mask)
843{
844 struct dentry *parent = dget_parent(dentry);
845 struct inode *dir = parent->d_inode;
846 struct nfs_server *server = NFS_SERVER(dir);
847 struct nfs4_opendata *p;
848
849 p = kzalloc(sizeof(*p), gfp_mask);
850 if (p == NULL)
851 goto err;
852 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
853 if (p->o_arg.seqid == NULL)
854 goto err_free;
855 nfs_sb_active(dentry->d_sb);
856 p->dentry = dget(dentry);
857 p->dir = parent;
858 p->owner = sp;
859 atomic_inc(&sp->so_count);
860 p->o_arg.fh = NFS_FH(dir);
861 p->o_arg.open_flags = flags;
862 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
863 p->o_arg.clientid = server->nfs_client->cl_clientid;
864 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
865 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
866 p->o_arg.name = &dentry->d_name;
867 p->o_arg.server = server;
868 p->o_arg.bitmask = server->attr_bitmask;
869 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
870 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
871 if (attrs != NULL && attrs->ia_valid != 0) {
872 __be32 verf[2];
873
874 p->o_arg.u.attrs = &p->attrs;
875 memcpy(&p->attrs, attrs, sizeof(p->attrs));
876
877 verf[0] = jiffies;
878 verf[1] = current->pid;
879 memcpy(p->o_arg.u.verifier.data, verf,
880 sizeof(p->o_arg.u.verifier.data));
881 }
882 p->c_arg.fh = &p->o_res.fh;
883 p->c_arg.stateid = &p->o_res.stateid;
884 p->c_arg.seqid = p->o_arg.seqid;
885 nfs4_init_opendata_res(p);
886 kref_init(&p->kref);
887 return p;
888err_free:
889 kfree(p);
890err:
891 dput(parent);
892 return NULL;
893}
894
895static void nfs4_opendata_free(struct kref *kref)
896{
897 struct nfs4_opendata *p = container_of(kref,
898 struct nfs4_opendata, kref);
899 struct super_block *sb = p->dentry->d_sb;
900
901 nfs_free_seqid(p->o_arg.seqid);
902 if (p->state != NULL)
903 nfs4_put_open_state(p->state);
904 nfs4_put_state_owner(p->owner);
905 dput(p->dir);
906 dput(p->dentry);
907 nfs_sb_deactive(sb);
908 nfs_fattr_free_names(&p->f_attr);
909 kfree(p);
910}
911
912static void nfs4_opendata_put(struct nfs4_opendata *p)
913{
914 if (p != NULL)
915 kref_put(&p->kref, nfs4_opendata_free);
916}
917
918static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
919{
920 int ret;
921
922 ret = rpc_wait_for_completion_task(task);
923 return ret;
924}
925
926static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
927{
928 int ret = 0;
929
930 if (open_mode & (O_EXCL|O_TRUNC))
931 goto out;
932 switch (mode & (FMODE_READ|FMODE_WRITE)) {
933 case FMODE_READ:
934 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
935 && state->n_rdonly != 0;
936 break;
937 case FMODE_WRITE:
938 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
939 && state->n_wronly != 0;
940 break;
941 case FMODE_READ|FMODE_WRITE:
942 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
943 && state->n_rdwr != 0;
944 }
945out:
946 return ret;
947}
948
949static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
950{
951 if (delegation == NULL)
952 return 0;
953 if ((delegation->type & fmode) != fmode)
954 return 0;
955 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
956 return 0;
957 nfs_mark_delegation_referenced(delegation);
958 return 1;
959}
960
961static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
962{
963 switch (fmode) {
964 case FMODE_WRITE:
965 state->n_wronly++;
966 break;
967 case FMODE_READ:
968 state->n_rdonly++;
969 break;
970 case FMODE_READ|FMODE_WRITE:
971 state->n_rdwr++;
972 }
973 nfs4_state_set_mode_locked(state, state->state | fmode);
974}
975
976static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
977{
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
981 switch (fmode) {
982 case FMODE_READ:
983 set_bit(NFS_O_RDONLY_STATE, &state->flags);
984 break;
985 case FMODE_WRITE:
986 set_bit(NFS_O_WRONLY_STATE, &state->flags);
987 break;
988 case FMODE_READ|FMODE_WRITE:
989 set_bit(NFS_O_RDWR_STATE, &state->flags);
990 }
991}
992
993static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
994{
995 write_seqlock(&state->seqlock);
996 nfs_set_open_stateid_locked(state, stateid, fmode);
997 write_sequnlock(&state->seqlock);
998}
999
1000static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1001{
1002 /*
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1005 */
1006 write_seqlock(&state->seqlock);
1007 if (deleg_stateid != NULL) {
1008 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1009 set_bit(NFS_DELEGATED_STATE, &state->flags);
1010 }
1011 if (open_stateid != NULL)
1012 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1013 write_sequnlock(&state->seqlock);
1014 spin_lock(&state->owner->so_lock);
1015 update_open_stateflags(state, fmode);
1016 spin_unlock(&state->owner->so_lock);
1017}
1018
1019static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1020{
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *deleg_cur;
1023 int ret = 0;
1024
1025 fmode &= (FMODE_READ|FMODE_WRITE);
1026
1027 rcu_read_lock();
1028 deleg_cur = rcu_dereference(nfsi->delegation);
1029 if (deleg_cur == NULL)
1030 goto no_delegation;
1031
1032 spin_lock(&deleg_cur->lock);
1033 if (nfsi->delegation != deleg_cur ||
1034 (deleg_cur->type & fmode) != fmode)
1035 goto no_delegation_unlock;
1036
1037 if (delegation == NULL)
1038 delegation = &deleg_cur->stateid;
1039 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1040 goto no_delegation_unlock;
1041
1042 nfs_mark_delegation_referenced(deleg_cur);
1043 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1044 ret = 1;
1045no_delegation_unlock:
1046 spin_unlock(&deleg_cur->lock);
1047no_delegation:
1048 rcu_read_unlock();
1049
1050 if (!ret && open_stateid != NULL) {
1051 __update_open_stateid(state, open_stateid, NULL, fmode);
1052 ret = 1;
1053 }
1054
1055 return ret;
1056}
1057
1058
1059static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1060{
1061 struct nfs_delegation *delegation;
1062
1063 rcu_read_lock();
1064 delegation = rcu_dereference(NFS_I(inode)->delegation);
1065 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1066 rcu_read_unlock();
1067 return;
1068 }
1069 rcu_read_unlock();
1070 nfs4_inode_return_delegation(inode);
1071}
1072
1073static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1074{
1075 struct nfs4_state *state = opendata->state;
1076 struct nfs_inode *nfsi = NFS_I(state->inode);
1077 struct nfs_delegation *delegation;
1078 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1079 fmode_t fmode = opendata->o_arg.fmode;
1080 nfs4_stateid stateid;
1081 int ret = -EAGAIN;
1082
1083 for (;;) {
1084 if (can_open_cached(state, fmode, open_mode)) {
1085 spin_lock(&state->owner->so_lock);
1086 if (can_open_cached(state, fmode, open_mode)) {
1087 update_open_stateflags(state, fmode);
1088 spin_unlock(&state->owner->so_lock);
1089 goto out_return_state;
1090 }
1091 spin_unlock(&state->owner->so_lock);
1092 }
1093 rcu_read_lock();
1094 delegation = rcu_dereference(nfsi->delegation);
1095 if (!can_open_delegated(delegation, fmode)) {
1096 rcu_read_unlock();
1097 break;
1098 }
1099 /* Save the delegation */
1100 nfs4_stateid_copy(&stateid, &delegation->stateid);
1101 rcu_read_unlock();
1102 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1103 if (ret != 0)
1104 goto out;
1105 ret = -EAGAIN;
1106
1107 /* Try to update the stateid using the delegation */
1108 if (update_open_stateid(state, NULL, &stateid, fmode))
1109 goto out_return_state;
1110 }
1111out:
1112 return ERR_PTR(ret);
1113out_return_state:
1114 atomic_inc(&state->count);
1115 return state;
1116}
1117
1118static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1119{
1120 struct inode *inode;
1121 struct nfs4_state *state = NULL;
1122 struct nfs_delegation *delegation;
1123 int ret;
1124
1125 if (!data->rpc_done) {
1126 state = nfs4_try_open_cached(data);
1127 goto out;
1128 }
1129
1130 ret = -EAGAIN;
1131 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1132 goto err;
1133 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1134 ret = PTR_ERR(inode);
1135 if (IS_ERR(inode))
1136 goto err;
1137 ret = -ENOMEM;
1138 state = nfs4_get_open_state(inode, data->owner);
1139 if (state == NULL)
1140 goto err_put_inode;
1141 if (data->o_res.delegation_type != 0) {
1142 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1143 int delegation_flags = 0;
1144
1145 rcu_read_lock();
1146 delegation = rcu_dereference(NFS_I(inode)->delegation);
1147 if (delegation)
1148 delegation_flags = delegation->flags;
1149 rcu_read_unlock();
1150 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1151 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1152 "returning a delegation for "
1153 "OPEN(CLAIM_DELEGATE_CUR)\n",
1154 clp->cl_hostname);
1155 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1156 nfs_inode_set_delegation(state->inode,
1157 data->owner->so_cred,
1158 &data->o_res);
1159 else
1160 nfs_inode_reclaim_delegation(state->inode,
1161 data->owner->so_cred,
1162 &data->o_res);
1163 }
1164
1165 update_open_stateid(state, &data->o_res.stateid, NULL,
1166 data->o_arg.fmode);
1167 iput(inode);
1168out:
1169 return state;
1170err_put_inode:
1171 iput(inode);
1172err:
1173 return ERR_PTR(ret);
1174}
1175
1176static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1177{
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1180
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1184 continue;
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1187 return ctx;
1188 }
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1191}
1192
1193static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1194{
1195 struct nfs4_opendata *opendata;
1196
1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1202 return opendata;
1203}
1204
1205static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1206{
1207 struct nfs4_state *newstate;
1208 int ret;
1209
1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
1215 ret = _nfs4_recover_proc_open(opendata);
1216 if (ret != 0)
1217 return ret;
1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
1221 nfs4_close_state(newstate, fmode);
1222 *res = newstate;
1223 return 0;
1224}
1225
1226static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1227{
1228 struct nfs4_state *newstate;
1229 int ret;
1230
1231 /* memory barrier prior to reading state->n_* */
1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1233 smp_rmb();
1234 if (state->n_rdwr != 0) {
1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1237 if (ret != 0)
1238 return ret;
1239 if (newstate != state)
1240 return -ESTALE;
1241 }
1242 if (state->n_wronly != 0) {
1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1245 if (ret != 0)
1246 return ret;
1247 if (newstate != state)
1248 return -ESTALE;
1249 }
1250 if (state->n_rdonly != 0) {
1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1253 if (ret != 0)
1254 return ret;
1255 if (newstate != state)
1256 return -ESTALE;
1257 }
1258 /*
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1261 */
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1264 write_seqlock(&state->seqlock);
1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1267 write_sequnlock(&state->seqlock);
1268 }
1269 return 0;
1270}
1271
1272/*
1273 * OPEN_RECLAIM:
1274 * reclaim state on the server after a reboot.
1275 */
1276static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1277{
1278 struct nfs_delegation *delegation;
1279 struct nfs4_opendata *opendata;
1280 fmode_t delegation_type = 0;
1281 int status;
1282
1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1291 delegation_type = delegation->type;
1292 rcu_read_unlock();
1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
1295 nfs4_opendata_put(opendata);
1296 return status;
1297}
1298
1299static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1300{
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1303 int err;
1304 do {
1305 err = _nfs4_do_open_reclaim(ctx, state);
1306 if (err != -NFS4ERR_DELAY)
1307 break;
1308 nfs4_handle_exception(server, err, &exception);
1309 } while (exception.retry);
1310 return err;
1311}
1312
1313static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1314{
1315 struct nfs_open_context *ctx;
1316 int ret;
1317
1318 ctx = nfs4_state_find_open_context(state);
1319 if (IS_ERR(ctx))
1320 return PTR_ERR(ctx);
1321 ret = nfs4_do_open_reclaim(ctx, state);
1322 put_nfs_open_context(ctx);
1323 return ret;
1324}
1325
1326static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1327{
1328 struct nfs4_opendata *opendata;
1329 int ret;
1330
1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1336 ret = nfs4_open_recover(opendata, state);
1337 nfs4_opendata_put(opendata);
1338 return ret;
1339}
1340
1341int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1342{
1343 struct nfs4_exception exception = { };
1344 struct nfs_server *server = NFS_SERVER(state->inode);
1345 int err;
1346 do {
1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1348 switch (err) {
1349 case 0:
1350 case -ENOENT:
1351 case -ESTALE:
1352 goto out;
1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
1358 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1359 goto out;
1360 case -NFS4ERR_STALE_CLIENTID:
1361 case -NFS4ERR_STALE_STATEID:
1362 case -NFS4ERR_EXPIRED:
1363 /* Don't recall a delegation if it was lost */
1364 nfs4_schedule_lease_recovery(server->nfs_client);
1365 goto out;
1366 case -ERESTARTSYS:
1367 /*
1368 * The show must go on: exit, but mark the
1369 * stateid as needing recovery.
1370 */
1371 case -NFS4ERR_DELEG_REVOKED:
1372 case -NFS4ERR_ADMIN_REVOKED:
1373 case -NFS4ERR_BAD_STATEID:
1374 nfs_inode_find_state_and_recover(state->inode,
1375 stateid);
1376 nfs4_schedule_stateid_recovery(server, state);
1377 case -EKEYEXPIRED:
1378 /*
1379 * User RPCSEC_GSS context has expired.
1380 * We cannot recover this stateid now, so
1381 * skip it and allow recovery thread to
1382 * proceed.
1383 */
1384 case -ENOMEM:
1385 err = 0;
1386 goto out;
1387 }
1388 err = nfs4_handle_exception(server, err, &exception);
1389 } while (exception.retry);
1390out:
1391 return err;
1392}
1393
1394static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1395{
1396 struct nfs4_opendata *data = calldata;
1397
1398 data->rpc_status = task->tk_status;
1399 if (data->rpc_status == 0) {
1400 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1401 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1402 renew_lease(data->o_res.server, data->timestamp);
1403 data->rpc_done = 1;
1404 }
1405}
1406
1407static void nfs4_open_confirm_release(void *calldata)
1408{
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1411
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1414 goto out_free;
1415 /* In case of error, no cleanup! */
1416 if (!data->rpc_done)
1417 goto out_free;
1418 state = nfs4_opendata_to_nfs4_state(data);
1419 if (!IS_ERR(state))
1420 nfs4_close_state(state, data->o_arg.fmode);
1421out_free:
1422 nfs4_opendata_put(data);
1423}
1424
1425static const struct rpc_call_ops nfs4_open_confirm_ops = {
1426 .rpc_call_done = nfs4_open_confirm_done,
1427 .rpc_release = nfs4_open_confirm_release,
1428};
1429
1430/*
1431 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1432 */
1433static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1434{
1435 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1436 struct rpc_task *task;
1437 struct rpc_message msg = {
1438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1439 .rpc_argp = &data->c_arg,
1440 .rpc_resp = &data->c_res,
1441 .rpc_cred = data->owner->so_cred,
1442 };
1443 struct rpc_task_setup task_setup_data = {
1444 .rpc_client = server->client,
1445 .rpc_message = &msg,
1446 .callback_ops = &nfs4_open_confirm_ops,
1447 .callback_data = data,
1448 .workqueue = nfsiod_workqueue,
1449 .flags = RPC_TASK_ASYNC,
1450 };
1451 int status;
1452
1453 kref_get(&data->kref);
1454 data->rpc_done = 0;
1455 data->rpc_status = 0;
1456 data->timestamp = jiffies;
1457 task = rpc_run_task(&task_setup_data);
1458 if (IS_ERR(task))
1459 return PTR_ERR(task);
1460 status = nfs4_wait_for_completion_rpc_task(task);
1461 if (status != 0) {
1462 data->cancelled = 1;
1463 smp_wmb();
1464 } else
1465 status = data->rpc_status;
1466 rpc_put_task(task);
1467 return status;
1468}
1469
1470static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1471{
1472 struct nfs4_opendata *data = calldata;
1473 struct nfs4_state_owner *sp = data->owner;
1474
1475 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1476 return;
1477 /*
1478 * Check if we still need to send an OPEN call, or if we can use
1479 * a delegation instead.
1480 */
1481 if (data->state != NULL) {
1482 struct nfs_delegation *delegation;
1483
1484 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1485 goto out_no_action;
1486 rcu_read_lock();
1487 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1488 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1489 can_open_delegated(delegation, data->o_arg.fmode))
1490 goto unlock_no_action;
1491 rcu_read_unlock();
1492 }
1493 /* Update client id. */
1494 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1495 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1496 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1497 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1498 }
1499 data->timestamp = jiffies;
1500 if (nfs4_setup_sequence(data->o_arg.server,
1501 &data->o_arg.seq_args,
1502 &data->o_res.seq_res, task))
1503 return;
1504 rpc_call_start(task);
1505 return;
1506unlock_no_action:
1507 rcu_read_unlock();
1508out_no_action:
1509 task->tk_action = NULL;
1510
1511}
1512
1513static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1514{
1515 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1516 nfs4_open_prepare(task, calldata);
1517}
1518
1519static void nfs4_open_done(struct rpc_task *task, void *calldata)
1520{
1521 struct nfs4_opendata *data = calldata;
1522
1523 data->rpc_status = task->tk_status;
1524
1525 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1526 return;
1527
1528 if (task->tk_status == 0) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
1530 case S_IFREG:
1531 break;
1532 case S_IFLNK:
1533 data->rpc_status = -ELOOP;
1534 break;
1535 case S_IFDIR:
1536 data->rpc_status = -EISDIR;
1537 break;
1538 default:
1539 data->rpc_status = -ENOTDIR;
1540 }
1541 renew_lease(data->o_res.server, data->timestamp);
1542 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1543 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1544 }
1545 data->rpc_done = 1;
1546}
1547
1548static void nfs4_open_release(void *calldata)
1549{
1550 struct nfs4_opendata *data = calldata;
1551 struct nfs4_state *state = NULL;
1552
1553 /* If this request hasn't been cancelled, do nothing */
1554 if (data->cancelled == 0)
1555 goto out_free;
1556 /* In case of error, no cleanup! */
1557 if (data->rpc_status != 0 || !data->rpc_done)
1558 goto out_free;
1559 /* In case we need an open_confirm, no cleanup! */
1560 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1561 goto out_free;
1562 state = nfs4_opendata_to_nfs4_state(data);
1563 if (!IS_ERR(state))
1564 nfs4_close_state(state, data->o_arg.fmode);
1565out_free:
1566 nfs4_opendata_put(data);
1567}
1568
1569static const struct rpc_call_ops nfs4_open_ops = {
1570 .rpc_call_prepare = nfs4_open_prepare,
1571 .rpc_call_done = nfs4_open_done,
1572 .rpc_release = nfs4_open_release,
1573};
1574
1575static const struct rpc_call_ops nfs4_recover_open_ops = {
1576 .rpc_call_prepare = nfs4_recover_open_prepare,
1577 .rpc_call_done = nfs4_open_done,
1578 .rpc_release = nfs4_open_release,
1579};
1580
1581static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1582{
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1587 struct rpc_task *task;
1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1590 .rpc_argp = o_arg,
1591 .rpc_resp = o_res,
1592 .rpc_cred = data->owner->so_cred,
1593 };
1594 struct rpc_task_setup task_setup_data = {
1595 .rpc_client = server->client,
1596 .rpc_message = &msg,
1597 .callback_ops = &nfs4_open_ops,
1598 .callback_data = data,
1599 .workqueue = nfsiod_workqueue,
1600 .flags = RPC_TASK_ASYNC,
1601 };
1602 int status;
1603
1604 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1605 kref_get(&data->kref);
1606 data->rpc_done = 0;
1607 data->rpc_status = 0;
1608 data->cancelled = 0;
1609 if (isrecover)
1610 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1611 task = rpc_run_task(&task_setup_data);
1612 if (IS_ERR(task))
1613 return PTR_ERR(task);
1614 status = nfs4_wait_for_completion_rpc_task(task);
1615 if (status != 0) {
1616 data->cancelled = 1;
1617 smp_wmb();
1618 } else
1619 status = data->rpc_status;
1620 rpc_put_task(task);
1621
1622 return status;
1623}
1624
1625static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1626{
1627 struct inode *dir = data->dir->d_inode;
1628 struct nfs_openres *o_res = &data->o_res;
1629 int status;
1630
1631 status = nfs4_run_open_task(data, 1);
1632 if (status != 0 || !data->rpc_done)
1633 return status;
1634
1635 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1636
1637 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1638 status = _nfs4_proc_open_confirm(data);
1639 if (status != 0)
1640 return status;
1641 }
1642
1643 return status;
1644}
1645
1646/*
1647 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1648 */
1649static int _nfs4_proc_open(struct nfs4_opendata *data)
1650{
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1655 int status;
1656
1657 status = nfs4_run_open_task(data, 0);
1658 if (!data->rpc_done)
1659 return status;
1660 if (status != 0) {
1661 if (status == -NFS4ERR_BADNAME &&
1662 !(o_arg->open_flags & O_CREAT))
1663 return -ENOENT;
1664 return status;
1665 }
1666
1667 nfs_fattr_map_and_free_names(server, &data->f_attr);
1668
1669 if (o_arg->open_flags & O_CREAT)
1670 update_changeattr(dir, &o_res->cinfo);
1671 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1672 server->caps &= ~NFS_CAP_POSIX_LOCK;
1673 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1674 status = _nfs4_proc_open_confirm(data);
1675 if (status != 0)
1676 return status;
1677 }
1678 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1679 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1680 return 0;
1681}
1682
1683static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1684{
1685 unsigned int loop;
1686 int ret;
1687
1688 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1689 ret = nfs4_wait_clnt_recover(clp);
1690 if (ret != 0)
1691 break;
1692 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1693 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1694 break;
1695 nfs4_schedule_state_manager(clp);
1696 ret = -EIO;
1697 }
1698 return ret;
1699}
1700
1701static int nfs4_recover_expired_lease(struct nfs_server *server)
1702{
1703 return nfs4_client_recover_expired_lease(server->nfs_client);
1704}
1705
1706/*
1707 * OPEN_EXPIRED:
1708 * reclaim state on the server after a network partition.
1709 * Assumes caller holds the appropriate lock
1710 */
1711static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1712{
1713 struct nfs4_opendata *opendata;
1714 int ret;
1715
1716 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1717 if (IS_ERR(opendata))
1718 return PTR_ERR(opendata);
1719 ret = nfs4_open_recover(opendata, state);
1720 if (ret == -ESTALE)
1721 d_drop(ctx->dentry);
1722 nfs4_opendata_put(opendata);
1723 return ret;
1724}
1725
1726static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1727{
1728 struct nfs_server *server = NFS_SERVER(state->inode);
1729 struct nfs4_exception exception = { };
1730 int err;
1731
1732 do {
1733 err = _nfs4_open_expired(ctx, state);
1734 switch (err) {
1735 default:
1736 goto out;
1737 case -NFS4ERR_GRACE:
1738 case -NFS4ERR_DELAY:
1739 nfs4_handle_exception(server, err, &exception);
1740 err = 0;
1741 }
1742 } while (exception.retry);
1743out:
1744 return err;
1745}
1746
1747static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1748{
1749 struct nfs_open_context *ctx;
1750 int ret;
1751
1752 ctx = nfs4_state_find_open_context(state);
1753 if (IS_ERR(ctx))
1754 return PTR_ERR(ctx);
1755 ret = nfs4_do_open_expired(ctx, state);
1756 put_nfs_open_context(ctx);
1757 return ret;
1758}
1759
1760#if defined(CONFIG_NFS_V4_1)
1761static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1762{
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 nfs4_stateid *stateid = &state->stateid;
1765 int status;
1766
1767 /* If a state reset has been done, test_stateid is unneeded */
1768 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1769 return;
1770
1771 status = nfs41_test_stateid(server, stateid);
1772 if (status != NFS_OK) {
1773 /* Free the stateid unless the server explicitly
1774 * informs us the stateid is unrecognized. */
1775 if (status != -NFS4ERR_BAD_STATEID)
1776 nfs41_free_stateid(server, stateid);
1777
1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1779 }
1780}
1781
1782/**
1783 * nfs41_check_open_stateid - possibly free an open stateid
1784 *
1785 * @state: NFSv4 state for an inode
1786 *
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1789 */
1790static int nfs41_check_open_stateid(struct nfs4_state *state)
1791{
1792 struct nfs_server *server = NFS_SERVER(state->inode);
1793 nfs4_stateid *stateid = &state->stateid;
1794 int status;
1795
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1800 return -NFS4ERR_BAD_STATEID;
1801
1802 status = nfs41_test_stateid(server, stateid);
1803 if (status != NFS_OK) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status != -NFS4ERR_BAD_STATEID)
1807 nfs41_free_stateid(server, stateid);
1808
1809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1812 }
1813 return status;
1814}
1815
1816static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1817{
1818 int status;
1819
1820 nfs41_clear_delegation_stateid(state);
1821 status = nfs41_check_open_stateid(state);
1822 if (status != NFS_OK)
1823 status = nfs4_open_expired(sp, state);
1824 return status;
1825}
1826#endif
1827
1828/*
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1832 */
1833static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1834{
1835 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1836 !(sattr->ia_valid & ATTR_ATIME_SET))
1837 sattr->ia_valid |= ATTR_ATIME;
1838
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1840 !(sattr->ia_valid & ATTR_MTIME_SET))
1841 sattr->ia_valid |= ATTR_MTIME;
1842}
1843
1844/*
1845 * Returns a referenced nfs4_state
1846 */
1847static int _nfs4_do_open(struct inode *dir,
1848 struct dentry *dentry,
1849 fmode_t fmode,
1850 int flags,
1851 struct iattr *sattr,
1852 struct rpc_cred *cred,
1853 struct nfs4_state **res,
1854 struct nfs4_threshold **ctx_th)
1855{
1856 struct nfs4_state_owner *sp;
1857 struct nfs4_state *state = NULL;
1858 struct nfs_server *server = NFS_SERVER(dir);
1859 struct nfs4_opendata *opendata;
1860 int status;
1861
1862 /* Protect against reboot recovery conflicts */
1863 status = -ENOMEM;
1864 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1865 if (sp == NULL) {
1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1867 goto out_err;
1868 }
1869 status = nfs4_recover_expired_lease(server);
1870 if (status != 0)
1871 goto err_put_state_owner;
1872 if (dentry->d_inode != NULL)
1873 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1874 status = -ENOMEM;
1875 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1876 if (opendata == NULL)
1877 goto err_put_state_owner;
1878
1879 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1880 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1881 if (!opendata->f_attr.mdsthreshold)
1882 goto err_opendata_put;
1883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1884 }
1885 if (dentry->d_inode != NULL)
1886 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1887
1888 status = _nfs4_proc_open(opendata);
1889 if (status != 0)
1890 goto err_opendata_put;
1891
1892 state = nfs4_opendata_to_nfs4_state(opendata);
1893 status = PTR_ERR(state);
1894 if (IS_ERR(state))
1895 goto err_opendata_put;
1896 if (server->caps & NFS_CAP_POSIX_LOCK)
1897 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1898
1899 if (opendata->o_arg.open_flags & O_EXCL) {
1900 nfs4_exclusive_attrset(opendata, sattr);
1901
1902 nfs_fattr_init(opendata->o_res.f_attr);
1903 status = nfs4_do_setattr(state->inode, cred,
1904 opendata->o_res.f_attr, sattr,
1905 state);
1906 if (status == 0)
1907 nfs_setattr_update_inode(state->inode, sattr);
1908 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1909 }
1910
1911 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1912 *ctx_th = opendata->f_attr.mdsthreshold;
1913 else
1914 kfree(opendata->f_attr.mdsthreshold);
1915 opendata->f_attr.mdsthreshold = NULL;
1916
1917 nfs4_opendata_put(opendata);
1918 nfs4_put_state_owner(sp);
1919 *res = state;
1920 return 0;
1921err_opendata_put:
1922 kfree(opendata->f_attr.mdsthreshold);
1923 nfs4_opendata_put(opendata);
1924err_put_state_owner:
1925 nfs4_put_state_owner(sp);
1926out_err:
1927 *res = NULL;
1928 return status;
1929}
1930
1931
1932static struct nfs4_state *nfs4_do_open(struct inode *dir,
1933 struct dentry *dentry,
1934 fmode_t fmode,
1935 int flags,
1936 struct iattr *sattr,
1937 struct rpc_cred *cred,
1938 struct nfs4_threshold **ctx_th)
1939{
1940 struct nfs4_exception exception = { };
1941 struct nfs4_state *res;
1942 int status;
1943
1944 fmode &= FMODE_READ|FMODE_WRITE;
1945 do {
1946 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1947 &res, ctx_th);
1948 if (status == 0)
1949 break;
1950 /* NOTE: BAD_SEQID means the server and client disagree about the
1951 * book-keeping w.r.t. state-changing operations
1952 * (OPEN/CLOSE/LOCK/LOCKU...)
1953 * It is actually a sign of a bug on the client or on the server.
1954 *
1955 * If we receive a BAD_SEQID error in the particular case of
1956 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1957 * have unhashed the old state_owner for us, and that we can
1958 * therefore safely retry using a new one. We should still warn
1959 * the user though...
1960 */
1961 if (status == -NFS4ERR_BAD_SEQID) {
1962 pr_warn_ratelimited("NFS: v4 server %s "
1963 " returned a bad sequence-id error!\n",
1964 NFS_SERVER(dir)->nfs_client->cl_hostname);
1965 exception.retry = 1;
1966 continue;
1967 }
1968 /*
1969 * BAD_STATEID on OPEN means that the server cancelled our
1970 * state before it received the OPEN_CONFIRM.
1971 * Recover by retrying the request as per the discussion
1972 * on Page 181 of RFC3530.
1973 */
1974 if (status == -NFS4ERR_BAD_STATEID) {
1975 exception.retry = 1;
1976 continue;
1977 }
1978 if (status == -EAGAIN) {
1979 /* We must have found a delegation */
1980 exception.retry = 1;
1981 continue;
1982 }
1983 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1984 status, &exception));
1985 } while (exception.retry);
1986 return res;
1987}
1988
1989static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1990 struct nfs_fattr *fattr, struct iattr *sattr,
1991 struct nfs4_state *state)
1992{
1993 struct nfs_server *server = NFS_SERVER(inode);
1994 struct nfs_setattrargs arg = {
1995 .fh = NFS_FH(inode),
1996 .iap = sattr,
1997 .server = server,
1998 .bitmask = server->attr_bitmask,
1999 };
2000 struct nfs_setattrres res = {
2001 .fattr = fattr,
2002 .server = server,
2003 };
2004 struct rpc_message msg = {
2005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2006 .rpc_argp = &arg,
2007 .rpc_resp = &res,
2008 .rpc_cred = cred,
2009 };
2010 unsigned long timestamp = jiffies;
2011 int status;
2012
2013 nfs_fattr_init(fattr);
2014
2015 if (state != NULL) {
2016 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2017 current->files, current->tgid);
2018 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2019 FMODE_WRITE)) {
2020 /* Use that stateid */
2021 } else
2022 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2023
2024 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2025 if (status == 0 && state != NULL)
2026 renew_lease(server, timestamp);
2027 return status;
2028}
2029
2030static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2031 struct nfs_fattr *fattr, struct iattr *sattr,
2032 struct nfs4_state *state)
2033{
2034 struct nfs_server *server = NFS_SERVER(inode);
2035 struct nfs4_exception exception = {
2036 .state = state,
2037 .inode = inode,
2038 };
2039 int err;
2040 do {
2041 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2042 switch (err) {
2043 case -NFS4ERR_OPENMODE:
2044 if (state && !(state->state & FMODE_WRITE)) {
2045 err = -EBADF;
2046 if (sattr->ia_valid & ATTR_OPEN)
2047 err = -EACCES;
2048 goto out;
2049 }
2050 }
2051 err = nfs4_handle_exception(server, err, &exception);
2052 } while (exception.retry);
2053out:
2054 return err;
2055}
2056
2057struct nfs4_closedata {
2058 struct inode *inode;
2059 struct nfs4_state *state;
2060 struct nfs_closeargs arg;
2061 struct nfs_closeres res;
2062 struct nfs_fattr fattr;
2063 unsigned long timestamp;
2064 bool roc;
2065 u32 roc_barrier;
2066};
2067
2068static void nfs4_free_closedata(void *data)
2069{
2070 struct nfs4_closedata *calldata = data;
2071 struct nfs4_state_owner *sp = calldata->state->owner;
2072 struct super_block *sb = calldata->state->inode->i_sb;
2073
2074 if (calldata->roc)
2075 pnfs_roc_release(calldata->state->inode);
2076 nfs4_put_open_state(calldata->state);
2077 nfs_free_seqid(calldata->arg.seqid);
2078 nfs4_put_state_owner(sp);
2079 nfs_sb_deactive(sb);
2080 kfree(calldata);
2081}
2082
2083static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2084 fmode_t fmode)
2085{
2086 spin_lock(&state->owner->so_lock);
2087 if (!(fmode & FMODE_READ))
2088 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2089 if (!(fmode & FMODE_WRITE))
2090 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2091 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2092 spin_unlock(&state->owner->so_lock);
2093}
2094
2095static void nfs4_close_done(struct rpc_task *task, void *data)
2096{
2097 struct nfs4_closedata *calldata = data;
2098 struct nfs4_state *state = calldata->state;
2099 struct nfs_server *server = NFS_SERVER(calldata->inode);
2100
2101 dprintk("%s: begin!\n", __func__);
2102 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2103 return;
2104 /* hmm. we are done with the inode, and in the process of freeing
2105 * the state_owner. we keep this around to process errors
2106 */
2107 switch (task->tk_status) {
2108 case 0:
2109 if (calldata->roc)
2110 pnfs_roc_set_barrier(state->inode,
2111 calldata->roc_barrier);
2112 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2113 renew_lease(server, calldata->timestamp);
2114 nfs4_close_clear_stateid_flags(state,
2115 calldata->arg.fmode);
2116 break;
2117 case -NFS4ERR_STALE_STATEID:
2118 case -NFS4ERR_OLD_STATEID:
2119 case -NFS4ERR_BAD_STATEID:
2120 case -NFS4ERR_EXPIRED:
2121 if (calldata->arg.fmode == 0)
2122 break;
2123 default:
2124 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2125 rpc_restart_call_prepare(task);
2126 }
2127 nfs_release_seqid(calldata->arg.seqid);
2128 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2129 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2130}
2131
2132static void nfs4_close_prepare(struct rpc_task *task, void *data)
2133{
2134 struct nfs4_closedata *calldata = data;
2135 struct nfs4_state *state = calldata->state;
2136 int call_close = 0;
2137
2138 dprintk("%s: begin!\n", __func__);
2139 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2140 return;
2141
2142 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2143 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2144 spin_lock(&state->owner->so_lock);
2145 /* Calculate the change in open mode */
2146 if (state->n_rdwr == 0) {
2147 if (state->n_rdonly == 0) {
2148 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2149 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2150 calldata->arg.fmode &= ~FMODE_READ;
2151 }
2152 if (state->n_wronly == 0) {
2153 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2154 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2155 calldata->arg.fmode &= ~FMODE_WRITE;
2156 }
2157 }
2158 spin_unlock(&state->owner->so_lock);
2159
2160 if (!call_close) {
2161 /* Note: exit _without_ calling nfs4_close_done */
2162 task->tk_action = NULL;
2163 goto out;
2164 }
2165
2166 if (calldata->arg.fmode == 0) {
2167 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2168 if (calldata->roc &&
2169 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2170 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2171 task, NULL);
2172 goto out;
2173 }
2174 }
2175
2176 nfs_fattr_init(calldata->res.fattr);
2177 calldata->timestamp = jiffies;
2178 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2179 &calldata->arg.seq_args,
2180 &calldata->res.seq_res,
2181 task))
2182 goto out;
2183 rpc_call_start(task);
2184out:
2185 dprintk("%s: done!\n", __func__);
2186}
2187
2188static const struct rpc_call_ops nfs4_close_ops = {
2189 .rpc_call_prepare = nfs4_close_prepare,
2190 .rpc_call_done = nfs4_close_done,
2191 .rpc_release = nfs4_free_closedata,
2192};
2193
2194/*
2195 * It is possible for data to be read/written from a mem-mapped file
2196 * after the sys_close call (which hits the vfs layer as a flush).
2197 * This means that we can't safely call nfsv4 close on a file until
2198 * the inode is cleared. This in turn means that we are not good
2199 * NFSv4 citizens - we do not indicate to the server to update the file's
2200 * share state even when we are done with one of the three share
2201 * stateid's in the inode.
2202 *
2203 * NOTE: Caller must be holding the sp->so_owner semaphore!
2204 */
2205int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2206{
2207 struct nfs_server *server = NFS_SERVER(state->inode);
2208 struct nfs4_closedata *calldata;
2209 struct nfs4_state_owner *sp = state->owner;
2210 struct rpc_task *task;
2211 struct rpc_message msg = {
2212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2213 .rpc_cred = state->owner->so_cred,
2214 };
2215 struct rpc_task_setup task_setup_data = {
2216 .rpc_client = server->client,
2217 .rpc_message = &msg,
2218 .callback_ops = &nfs4_close_ops,
2219 .workqueue = nfsiod_workqueue,
2220 .flags = RPC_TASK_ASYNC,
2221 };
2222 int status = -ENOMEM;
2223
2224 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2225 if (calldata == NULL)
2226 goto out;
2227 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2228 calldata->inode = state->inode;
2229 calldata->state = state;
2230 calldata->arg.fh = NFS_FH(state->inode);
2231 calldata->arg.stateid = &state->open_stateid;
2232 /* Serialization for the sequence id */
2233 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2234 if (calldata->arg.seqid == NULL)
2235 goto out_free_calldata;
2236 calldata->arg.fmode = 0;
2237 calldata->arg.bitmask = server->cache_consistency_bitmask;
2238 calldata->res.fattr = &calldata->fattr;
2239 calldata->res.seqid = calldata->arg.seqid;
2240 calldata->res.server = server;
2241 calldata->roc = roc;
2242 nfs_sb_active(calldata->inode->i_sb);
2243
2244 msg.rpc_argp = &calldata->arg;
2245 msg.rpc_resp = &calldata->res;
2246 task_setup_data.callback_data = calldata;
2247 task = rpc_run_task(&task_setup_data);
2248 if (IS_ERR(task))
2249 return PTR_ERR(task);
2250 status = 0;
2251 if (wait)
2252 status = rpc_wait_for_completion_task(task);
2253 rpc_put_task(task);
2254 return status;
2255out_free_calldata:
2256 kfree(calldata);
2257out:
2258 if (roc)
2259 pnfs_roc_release(state->inode);
2260 nfs4_put_open_state(state);
2261 nfs4_put_state_owner(sp);
2262 return status;
2263}
2264
2265static struct inode *
2266nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2267{
2268 struct nfs4_state *state;
2269
2270 /* Protect against concurrent sillydeletes */
2271 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2272 ctx->cred, &ctx->mdsthreshold);
2273 if (IS_ERR(state))
2274 return ERR_CAST(state);
2275 ctx->state = state;
2276 return igrab(state->inode);
2277}
2278
2279static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2280{
2281 if (ctx->state == NULL)
2282 return;
2283 if (is_sync)
2284 nfs4_close_sync(ctx->state, ctx->mode);
2285 else
2286 nfs4_close_state(ctx->state, ctx->mode);
2287}
2288
2289static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2290{
2291 struct nfs4_server_caps_arg args = {
2292 .fhandle = fhandle,
2293 };
2294 struct nfs4_server_caps_res res = {};
2295 struct rpc_message msg = {
2296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2297 .rpc_argp = &args,
2298 .rpc_resp = &res,
2299 };
2300 int status;
2301
2302 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2303 if (status == 0) {
2304 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2305 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2306 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2307 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2308 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2309 NFS_CAP_CTIME|NFS_CAP_MTIME);
2310 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2311 server->caps |= NFS_CAP_ACLS;
2312 if (res.has_links != 0)
2313 server->caps |= NFS_CAP_HARDLINKS;
2314 if (res.has_symlinks != 0)
2315 server->caps |= NFS_CAP_SYMLINKS;
2316 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2317 server->caps |= NFS_CAP_FILEID;
2318 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2319 server->caps |= NFS_CAP_MODE;
2320 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2321 server->caps |= NFS_CAP_NLINK;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2323 server->caps |= NFS_CAP_OWNER;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2325 server->caps |= NFS_CAP_OWNER_GROUP;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2327 server->caps |= NFS_CAP_ATIME;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2329 server->caps |= NFS_CAP_CTIME;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2331 server->caps |= NFS_CAP_MTIME;
2332
2333 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2334 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2335 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2336 server->acl_bitmask = res.acl_bitmask;
2337 server->fh_expire_type = res.fh_expire_type;
2338 }
2339
2340 return status;
2341}
2342
2343int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2344{
2345 struct nfs4_exception exception = { };
2346 int err;
2347 do {
2348 err = nfs4_handle_exception(server,
2349 _nfs4_server_capabilities(server, fhandle),
2350 &exception);
2351 } while (exception.retry);
2352 return err;
2353}
2354
2355static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2356 struct nfs_fsinfo *info)
2357{
2358 struct nfs4_lookup_root_arg args = {
2359 .bitmask = nfs4_fattr_bitmap,
2360 };
2361 struct nfs4_lookup_res res = {
2362 .server = server,
2363 .fattr = info->fattr,
2364 .fh = fhandle,
2365 };
2366 struct rpc_message msg = {
2367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2368 .rpc_argp = &args,
2369 .rpc_resp = &res,
2370 };
2371
2372 nfs_fattr_init(info->fattr);
2373 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2374}
2375
2376static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2377 struct nfs_fsinfo *info)
2378{
2379 struct nfs4_exception exception = { };
2380 int err;
2381 do {
2382 err = _nfs4_lookup_root(server, fhandle, info);
2383 switch (err) {
2384 case 0:
2385 case -NFS4ERR_WRONGSEC:
2386 goto out;
2387 default:
2388 err = nfs4_handle_exception(server, err, &exception);
2389 }
2390 } while (exception.retry);
2391out:
2392 return err;
2393}
2394
2395static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2396 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2397{
2398 struct rpc_auth *auth;
2399 int ret;
2400
2401 auth = rpcauth_create(flavor, server->client);
2402 if (!auth) {
2403 ret = -EIO;
2404 goto out;
2405 }
2406 ret = nfs4_lookup_root(server, fhandle, info);
2407out:
2408 return ret;
2409}
2410
2411static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2412 struct nfs_fsinfo *info)
2413{
2414 int i, len, status = 0;
2415 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2416
2417 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2418 BUG_ON(len < 0);
2419
2420 for (i = 0; i < len; i++) {
2421 /* AUTH_UNIX is the default flavor if none was specified,
2422 * thus has already been tried. */
2423 if (flav_array[i] == RPC_AUTH_UNIX)
2424 continue;
2425
2426 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2427 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2428 continue;
2429 break;
2430 }
2431 /*
2432 * -EACCESS could mean that the user doesn't have correct permissions
2433 * to access the mount. It could also mean that we tried to mount
2434 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2435 * existing mount programs don't handle -EACCES very well so it should
2436 * be mapped to -EPERM instead.
2437 */
2438 if (status == -EACCES)
2439 status = -EPERM;
2440 return status;
2441}
2442
2443/*
2444 * get the file handle for the "/" directory on the server
2445 */
2446int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2447 struct nfs_fsinfo *info)
2448{
2449 int minor_version = server->nfs_client->cl_minorversion;
2450 int status = nfs4_lookup_root(server, fhandle, info);
2451 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2452 /*
2453 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2454 * by nfs4_map_errors() as this function exits.
2455 */
2456 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2457 if (status == 0)
2458 status = nfs4_server_capabilities(server, fhandle);
2459 if (status == 0)
2460 status = nfs4_do_fsinfo(server, fhandle, info);
2461 return nfs4_map_errors(status);
2462}
2463
2464static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2465 struct nfs_fsinfo *info)
2466{
2467 int error;
2468 struct nfs_fattr *fattr = info->fattr;
2469
2470 error = nfs4_server_capabilities(server, mntfh);
2471 if (error < 0) {
2472 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2473 return error;
2474 }
2475
2476 error = nfs4_proc_getattr(server, mntfh, fattr);
2477 if (error < 0) {
2478 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2479 return error;
2480 }
2481
2482 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2483 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2484 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2485
2486 return error;
2487}
2488
2489/*
2490 * Get locations and (maybe) other attributes of a referral.
2491 * Note that we'll actually follow the referral later when
2492 * we detect fsid mismatch in inode revalidation
2493 */
2494static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2495 const struct qstr *name, struct nfs_fattr *fattr,
2496 struct nfs_fh *fhandle)
2497{
2498 int status = -ENOMEM;
2499 struct page *page = NULL;
2500 struct nfs4_fs_locations *locations = NULL;
2501
2502 page = alloc_page(GFP_KERNEL);
2503 if (page == NULL)
2504 goto out;
2505 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2506 if (locations == NULL)
2507 goto out;
2508
2509 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2510 if (status != 0)
2511 goto out;
2512 /* Make sure server returned a different fsid for the referral */
2513 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2514 dprintk("%s: server did not return a different fsid for"
2515 " a referral at %s\n", __func__, name->name);
2516 status = -EIO;
2517 goto out;
2518 }
2519 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2520 nfs_fixup_referral_attributes(&locations->fattr);
2521
2522 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2523 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2524 memset(fhandle, 0, sizeof(struct nfs_fh));
2525out:
2526 if (page)
2527 __free_page(page);
2528 kfree(locations);
2529 return status;
2530}
2531
2532static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2533{
2534 struct nfs4_getattr_arg args = {
2535 .fh = fhandle,
2536 .bitmask = server->attr_bitmask,
2537 };
2538 struct nfs4_getattr_res res = {
2539 .fattr = fattr,
2540 .server = server,
2541 };
2542 struct rpc_message msg = {
2543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2544 .rpc_argp = &args,
2545 .rpc_resp = &res,
2546 };
2547
2548 nfs_fattr_init(fattr);
2549 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2550}
2551
2552static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2553{
2554 struct nfs4_exception exception = { };
2555 int err;
2556 do {
2557 err = nfs4_handle_exception(server,
2558 _nfs4_proc_getattr(server, fhandle, fattr),
2559 &exception);
2560 } while (exception.retry);
2561 return err;
2562}
2563
2564/*
2565 * The file is not closed if it is opened due to the a request to change
2566 * the size of the file. The open call will not be needed once the
2567 * VFS layer lookup-intents are implemented.
2568 *
2569 * Close is called when the inode is destroyed.
2570 * If we haven't opened the file for O_WRONLY, we
2571 * need to in the size_change case to obtain a stateid.
2572 *
2573 * Got race?
2574 * Because OPEN is always done by name in nfsv4, it is
2575 * possible that we opened a different file by the same
2576 * name. We can recognize this race condition, but we
2577 * can't do anything about it besides returning an error.
2578 *
2579 * This will be fixed with VFS changes (lookup-intent).
2580 */
2581static int
2582nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2583 struct iattr *sattr)
2584{
2585 struct inode *inode = dentry->d_inode;
2586 struct rpc_cred *cred = NULL;
2587 struct nfs4_state *state = NULL;
2588 int status;
2589
2590 if (pnfs_ld_layoutret_on_setattr(inode))
2591 pnfs_return_layout(inode);
2592
2593 nfs_fattr_init(fattr);
2594
2595 /* Deal with open(O_TRUNC) */
2596 if (sattr->ia_valid & ATTR_OPEN)
2597 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2598
2599 /* Optimization: if the end result is no change, don't RPC */
2600 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2601 return 0;
2602
2603 /* Search for an existing open(O_WRITE) file */
2604 if (sattr->ia_valid & ATTR_FILE) {
2605 struct nfs_open_context *ctx;
2606
2607 ctx = nfs_file_open_context(sattr->ia_file);
2608 if (ctx) {
2609 cred = ctx->cred;
2610 state = ctx->state;
2611 }
2612 }
2613
2614 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2615 if (status == 0)
2616 nfs_setattr_update_inode(inode, sattr);
2617 return status;
2618}
2619
2620static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2621 const struct qstr *name, struct nfs_fh *fhandle,
2622 struct nfs_fattr *fattr)
2623{
2624 struct nfs_server *server = NFS_SERVER(dir);
2625 int status;
2626 struct nfs4_lookup_arg args = {
2627 .bitmask = server->attr_bitmask,
2628 .dir_fh = NFS_FH(dir),
2629 .name = name,
2630 };
2631 struct nfs4_lookup_res res = {
2632 .server = server,
2633 .fattr = fattr,
2634 .fh = fhandle,
2635 };
2636 struct rpc_message msg = {
2637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2638 .rpc_argp = &args,
2639 .rpc_resp = &res,
2640 };
2641
2642 nfs_fattr_init(fattr);
2643
2644 dprintk("NFS call lookup %s\n", name->name);
2645 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2646 dprintk("NFS reply lookup: %d\n", status);
2647 return status;
2648}
2649
2650static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2651{
2652 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2653 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2654 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2655 fattr->nlink = 2;
2656}
2657
2658static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2659 struct qstr *name, struct nfs_fh *fhandle,
2660 struct nfs_fattr *fattr)
2661{
2662 struct nfs4_exception exception = { };
2663 struct rpc_clnt *client = *clnt;
2664 int err;
2665 do {
2666 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2667 switch (err) {
2668 case -NFS4ERR_BADNAME:
2669 err = -ENOENT;
2670 goto out;
2671 case -NFS4ERR_MOVED:
2672 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2673 goto out;
2674 case -NFS4ERR_WRONGSEC:
2675 err = -EPERM;
2676 if (client != *clnt)
2677 goto out;
2678
2679 client = nfs4_create_sec_client(client, dir, name);
2680 if (IS_ERR(client))
2681 return PTR_ERR(client);
2682
2683 exception.retry = 1;
2684 break;
2685 default:
2686 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2687 }
2688 } while (exception.retry);
2689
2690out:
2691 if (err == 0)
2692 *clnt = client;
2693 else if (client != *clnt)
2694 rpc_shutdown_client(client);
2695
2696 return err;
2697}
2698
2699static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2700 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2701{
2702 int status;
2703 struct rpc_clnt *client = NFS_CLIENT(dir);
2704
2705 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2706 if (client != NFS_CLIENT(dir)) {
2707 rpc_shutdown_client(client);
2708 nfs_fixup_secinfo_attributes(fattr);
2709 }
2710 return status;
2711}
2712
2713struct rpc_clnt *
2714nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2715 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2716{
2717 int status;
2718 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2719
2720 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2721 if (status < 0) {
2722 rpc_shutdown_client(client);
2723 return ERR_PTR(status);
2724 }
2725 return client;
2726}
2727
2728static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2729{
2730 struct nfs_server *server = NFS_SERVER(inode);
2731 struct nfs4_accessargs args = {
2732 .fh = NFS_FH(inode),
2733 .bitmask = server->cache_consistency_bitmask,
2734 };
2735 struct nfs4_accessres res = {
2736 .server = server,
2737 };
2738 struct rpc_message msg = {
2739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2740 .rpc_argp = &args,
2741 .rpc_resp = &res,
2742 .rpc_cred = entry->cred,
2743 };
2744 int mode = entry->mask;
2745 int status;
2746
2747 /*
2748 * Determine which access bits we want to ask for...
2749 */
2750 if (mode & MAY_READ)
2751 args.access |= NFS4_ACCESS_READ;
2752 if (S_ISDIR(inode->i_mode)) {
2753 if (mode & MAY_WRITE)
2754 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2755 if (mode & MAY_EXEC)
2756 args.access |= NFS4_ACCESS_LOOKUP;
2757 } else {
2758 if (mode & MAY_WRITE)
2759 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2760 if (mode & MAY_EXEC)
2761 args.access |= NFS4_ACCESS_EXECUTE;
2762 }
2763
2764 res.fattr = nfs_alloc_fattr();
2765 if (res.fattr == NULL)
2766 return -ENOMEM;
2767
2768 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2769 if (!status) {
2770 entry->mask = 0;
2771 if (res.access & NFS4_ACCESS_READ)
2772 entry->mask |= MAY_READ;
2773 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2774 entry->mask |= MAY_WRITE;
2775 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2776 entry->mask |= MAY_EXEC;
2777 nfs_refresh_inode(inode, res.fattr);
2778 }
2779 nfs_free_fattr(res.fattr);
2780 return status;
2781}
2782
2783static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2784{
2785 struct nfs4_exception exception = { };
2786 int err;
2787 do {
2788 err = nfs4_handle_exception(NFS_SERVER(inode),
2789 _nfs4_proc_access(inode, entry),
2790 &exception);
2791 } while (exception.retry);
2792 return err;
2793}
2794
2795/*
2796 * TODO: For the time being, we don't try to get any attributes
2797 * along with any of the zero-copy operations READ, READDIR,
2798 * READLINK, WRITE.
2799 *
2800 * In the case of the first three, we want to put the GETATTR
2801 * after the read-type operation -- this is because it is hard
2802 * to predict the length of a GETATTR response in v4, and thus
2803 * align the READ data correctly. This means that the GETATTR
2804 * may end up partially falling into the page cache, and we should
2805 * shift it into the 'tail' of the xdr_buf before processing.
2806 * To do this efficiently, we need to know the total length
2807 * of data received, which doesn't seem to be available outside
2808 * of the RPC layer.
2809 *
2810 * In the case of WRITE, we also want to put the GETATTR after
2811 * the operation -- in this case because we want to make sure
2812 * we get the post-operation mtime and size.
2813 *
2814 * Both of these changes to the XDR layer would in fact be quite
2815 * minor, but I decided to leave them for a subsequent patch.
2816 */
2817static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2818 unsigned int pgbase, unsigned int pglen)
2819{
2820 struct nfs4_readlink args = {
2821 .fh = NFS_FH(inode),
2822 .pgbase = pgbase,
2823 .pglen = pglen,
2824 .pages = &page,
2825 };
2826 struct nfs4_readlink_res res;
2827 struct rpc_message msg = {
2828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2829 .rpc_argp = &args,
2830 .rpc_resp = &res,
2831 };
2832
2833 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2834}
2835
2836static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2837 unsigned int pgbase, unsigned int pglen)
2838{
2839 struct nfs4_exception exception = { };
2840 int err;
2841 do {
2842 err = nfs4_handle_exception(NFS_SERVER(inode),
2843 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2844 &exception);
2845 } while (exception.retry);
2846 return err;
2847}
2848
2849/*
2850 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2851 */
2852static int
2853nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2854 int flags)
2855{
2856 struct nfs_open_context *ctx;
2857 struct nfs4_state *state;
2858 int status = 0;
2859
2860 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2861 if (IS_ERR(ctx))
2862 return PTR_ERR(ctx);
2863
2864 sattr->ia_mode &= ~current_umask();
2865 state = nfs4_do_open(dir, dentry, ctx->mode,
2866 flags, sattr, ctx->cred,
2867 &ctx->mdsthreshold);
2868 d_drop(dentry);
2869 if (IS_ERR(state)) {
2870 status = PTR_ERR(state);
2871 goto out;
2872 }
2873 d_add(dentry, igrab(state->inode));
2874 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2875 ctx->state = state;
2876out:
2877 put_nfs_open_context(ctx);
2878 return status;
2879}
2880
2881static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2882{
2883 struct nfs_server *server = NFS_SERVER(dir);
2884 struct nfs_removeargs args = {
2885 .fh = NFS_FH(dir),
2886 .name = *name,
2887 };
2888 struct nfs_removeres res = {
2889 .server = server,
2890 };
2891 struct rpc_message msg = {
2892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2893 .rpc_argp = &args,
2894 .rpc_resp = &res,
2895 };
2896 int status;
2897
2898 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2899 if (status == 0)
2900 update_changeattr(dir, &res.cinfo);
2901 return status;
2902}
2903
2904static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2905{
2906 struct nfs4_exception exception = { };
2907 int err;
2908 do {
2909 err = nfs4_handle_exception(NFS_SERVER(dir),
2910 _nfs4_proc_remove(dir, name),
2911 &exception);
2912 } while (exception.retry);
2913 return err;
2914}
2915
2916static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2917{
2918 struct nfs_server *server = NFS_SERVER(dir);
2919 struct nfs_removeargs *args = msg->rpc_argp;
2920 struct nfs_removeres *res = msg->rpc_resp;
2921
2922 res->server = server;
2923 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2924 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2925}
2926
2927static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2928{
2929 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2930 &data->args.seq_args,
2931 &data->res.seq_res,
2932 task))
2933 return;
2934 rpc_call_start(task);
2935}
2936
2937static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2938{
2939 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2940
2941 if (!nfs4_sequence_done(task, &res->seq_res))
2942 return 0;
2943 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2944 return 0;
2945 update_changeattr(dir, &res->cinfo);
2946 return 1;
2947}
2948
2949static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2950{
2951 struct nfs_server *server = NFS_SERVER(dir);
2952 struct nfs_renameargs *arg = msg->rpc_argp;
2953 struct nfs_renameres *res = msg->rpc_resp;
2954
2955 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2956 res->server = server;
2957 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2958}
2959
2960static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2961{
2962 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2963 &data->args.seq_args,
2964 &data->res.seq_res,
2965 task))
2966 return;
2967 rpc_call_start(task);
2968}
2969
2970static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2971 struct inode *new_dir)
2972{
2973 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2974
2975 if (!nfs4_sequence_done(task, &res->seq_res))
2976 return 0;
2977 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2978 return 0;
2979
2980 update_changeattr(old_dir, &res->old_cinfo);
2981 update_changeattr(new_dir, &res->new_cinfo);
2982 return 1;
2983}
2984
2985static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2986 struct inode *new_dir, struct qstr *new_name)
2987{
2988 struct nfs_server *server = NFS_SERVER(old_dir);
2989 struct nfs_renameargs arg = {
2990 .old_dir = NFS_FH(old_dir),
2991 .new_dir = NFS_FH(new_dir),
2992 .old_name = old_name,
2993 .new_name = new_name,
2994 };
2995 struct nfs_renameres res = {
2996 .server = server,
2997 };
2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3000 .rpc_argp = &arg,
3001 .rpc_resp = &res,
3002 };
3003 int status = -ENOMEM;
3004
3005 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3006 if (!status) {
3007 update_changeattr(old_dir, &res.old_cinfo);
3008 update_changeattr(new_dir, &res.new_cinfo);
3009 }
3010 return status;
3011}
3012
3013static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3014 struct inode *new_dir, struct qstr *new_name)
3015{
3016 struct nfs4_exception exception = { };
3017 int err;
3018 do {
3019 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3020 _nfs4_proc_rename(old_dir, old_name,
3021 new_dir, new_name),
3022 &exception);
3023 } while (exception.retry);
3024 return err;
3025}
3026
3027static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3028{
3029 struct nfs_server *server = NFS_SERVER(inode);
3030 struct nfs4_link_arg arg = {
3031 .fh = NFS_FH(inode),
3032 .dir_fh = NFS_FH(dir),
3033 .name = name,
3034 .bitmask = server->attr_bitmask,
3035 };
3036 struct nfs4_link_res res = {
3037 .server = server,
3038 };
3039 struct rpc_message msg = {
3040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3041 .rpc_argp = &arg,
3042 .rpc_resp = &res,
3043 };
3044 int status = -ENOMEM;
3045
3046 res.fattr = nfs_alloc_fattr();
3047 if (res.fattr == NULL)
3048 goto out;
3049
3050 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3051 if (!status) {
3052 update_changeattr(dir, &res.cinfo);
3053 nfs_post_op_update_inode(inode, res.fattr);
3054 }
3055out:
3056 nfs_free_fattr(res.fattr);
3057 return status;
3058}
3059
3060static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3061{
3062 struct nfs4_exception exception = { };
3063 int err;
3064 do {
3065 err = nfs4_handle_exception(NFS_SERVER(inode),
3066 _nfs4_proc_link(inode, dir, name),
3067 &exception);
3068 } while (exception.retry);
3069 return err;
3070}
3071
3072struct nfs4_createdata {
3073 struct rpc_message msg;
3074 struct nfs4_create_arg arg;
3075 struct nfs4_create_res res;
3076 struct nfs_fh fh;
3077 struct nfs_fattr fattr;
3078};
3079
3080static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3081 struct qstr *name, struct iattr *sattr, u32 ftype)
3082{
3083 struct nfs4_createdata *data;
3084
3085 data = kzalloc(sizeof(*data), GFP_KERNEL);
3086 if (data != NULL) {
3087 struct nfs_server *server = NFS_SERVER(dir);
3088
3089 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3090 data->msg.rpc_argp = &data->arg;
3091 data->msg.rpc_resp = &data->res;
3092 data->arg.dir_fh = NFS_FH(dir);
3093 data->arg.server = server;
3094 data->arg.name = name;
3095 data->arg.attrs = sattr;
3096 data->arg.ftype = ftype;
3097 data->arg.bitmask = server->attr_bitmask;
3098 data->res.server = server;
3099 data->res.fh = &data->fh;
3100 data->res.fattr = &data->fattr;
3101 nfs_fattr_init(data->res.fattr);
3102 }
3103 return data;
3104}
3105
3106static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3107{
3108 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3109 &data->arg.seq_args, &data->res.seq_res, 1);
3110 if (status == 0) {
3111 update_changeattr(dir, &data->res.dir_cinfo);
3112 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3113 }
3114 return status;
3115}
3116
3117static void nfs4_free_createdata(struct nfs4_createdata *data)
3118{
3119 kfree(data);
3120}
3121
3122static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3123 struct page *page, unsigned int len, struct iattr *sattr)
3124{
3125 struct nfs4_createdata *data;
3126 int status = -ENAMETOOLONG;
3127
3128 if (len > NFS4_MAXPATHLEN)
3129 goto out;
3130
3131 status = -ENOMEM;
3132 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3133 if (data == NULL)
3134 goto out;
3135
3136 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3137 data->arg.u.symlink.pages = &page;
3138 data->arg.u.symlink.len = len;
3139
3140 status = nfs4_do_create(dir, dentry, data);
3141
3142 nfs4_free_createdata(data);
3143out:
3144 return status;
3145}
3146
3147static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3148 struct page *page, unsigned int len, struct iattr *sattr)
3149{
3150 struct nfs4_exception exception = { };
3151 int err;
3152 do {
3153 err = nfs4_handle_exception(NFS_SERVER(dir),
3154 _nfs4_proc_symlink(dir, dentry, page,
3155 len, sattr),
3156 &exception);
3157 } while (exception.retry);
3158 return err;
3159}
3160
3161static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3162 struct iattr *sattr)
3163{
3164 struct nfs4_createdata *data;
3165 int status = -ENOMEM;
3166
3167 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3168 if (data == NULL)
3169 goto out;
3170
3171 status = nfs4_do_create(dir, dentry, data);
3172
3173 nfs4_free_createdata(data);
3174out:
3175 return status;
3176}
3177
3178static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3179 struct iattr *sattr)
3180{
3181 struct nfs4_exception exception = { };
3182 int err;
3183
3184 sattr->ia_mode &= ~current_umask();
3185 do {
3186 err = nfs4_handle_exception(NFS_SERVER(dir),
3187 _nfs4_proc_mkdir(dir, dentry, sattr),
3188 &exception);
3189 } while (exception.retry);
3190 return err;
3191}
3192
3193static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3194 u64 cookie, struct page **pages, unsigned int count, int plus)
3195{
3196 struct inode *dir = dentry->d_inode;
3197 struct nfs4_readdir_arg args = {
3198 .fh = NFS_FH(dir),
3199 .pages = pages,
3200 .pgbase = 0,
3201 .count = count,
3202 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3203 .plus = plus,
3204 };
3205 struct nfs4_readdir_res res;
3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3208 .rpc_argp = &args,
3209 .rpc_resp = &res,
3210 .rpc_cred = cred,
3211 };
3212 int status;
3213
3214 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3215 dentry->d_parent->d_name.name,
3216 dentry->d_name.name,
3217 (unsigned long long)cookie);
3218 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3219 res.pgbase = args.pgbase;
3220 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3221 if (status >= 0) {
3222 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3223 status += args.pgbase;
3224 }
3225
3226 nfs_invalidate_atime(dir);
3227
3228 dprintk("%s: returns %d\n", __func__, status);
3229 return status;
3230}
3231
3232static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3233 u64 cookie, struct page **pages, unsigned int count, int plus)
3234{
3235 struct nfs4_exception exception = { };
3236 int err;
3237 do {
3238 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3239 _nfs4_proc_readdir(dentry, cred, cookie,
3240 pages, count, plus),
3241 &exception);
3242 } while (exception.retry);
3243 return err;
3244}
3245
3246static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3247 struct iattr *sattr, dev_t rdev)
3248{
3249 struct nfs4_createdata *data;
3250 int mode = sattr->ia_mode;
3251 int status = -ENOMEM;
3252
3253 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3254 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3255
3256 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3257 if (data == NULL)
3258 goto out;
3259
3260 if (S_ISFIFO(mode))
3261 data->arg.ftype = NF4FIFO;
3262 else if (S_ISBLK(mode)) {
3263 data->arg.ftype = NF4BLK;
3264 data->arg.u.device.specdata1 = MAJOR(rdev);
3265 data->arg.u.device.specdata2 = MINOR(rdev);
3266 }
3267 else if (S_ISCHR(mode)) {
3268 data->arg.ftype = NF4CHR;
3269 data->arg.u.device.specdata1 = MAJOR(rdev);
3270 data->arg.u.device.specdata2 = MINOR(rdev);
3271 }
3272
3273 status = nfs4_do_create(dir, dentry, data);
3274
3275 nfs4_free_createdata(data);
3276out:
3277 return status;
3278}
3279
3280static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3281 struct iattr *sattr, dev_t rdev)
3282{
3283 struct nfs4_exception exception = { };
3284 int err;
3285
3286 sattr->ia_mode &= ~current_umask();
3287 do {
3288 err = nfs4_handle_exception(NFS_SERVER(dir),
3289 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3290 &exception);
3291 } while (exception.retry);
3292 return err;
3293}
3294
3295static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3296 struct nfs_fsstat *fsstat)
3297{
3298 struct nfs4_statfs_arg args = {
3299 .fh = fhandle,
3300 .bitmask = server->attr_bitmask,
3301 };
3302 struct nfs4_statfs_res res = {
3303 .fsstat = fsstat,
3304 };
3305 struct rpc_message msg = {
3306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3307 .rpc_argp = &args,
3308 .rpc_resp = &res,
3309 };
3310
3311 nfs_fattr_init(fsstat->fattr);
3312 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3313}
3314
3315static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3316{
3317 struct nfs4_exception exception = { };
3318 int err;
3319 do {
3320 err = nfs4_handle_exception(server,
3321 _nfs4_proc_statfs(server, fhandle, fsstat),
3322 &exception);
3323 } while (exception.retry);
3324 return err;
3325}
3326
3327static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3328 struct nfs_fsinfo *fsinfo)
3329{
3330 struct nfs4_fsinfo_arg args = {
3331 .fh = fhandle,
3332 .bitmask = server->attr_bitmask,
3333 };
3334 struct nfs4_fsinfo_res res = {
3335 .fsinfo = fsinfo,
3336 };
3337 struct rpc_message msg = {
3338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3339 .rpc_argp = &args,
3340 .rpc_resp = &res,
3341 };
3342
3343 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3344}
3345
3346static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3347{
3348 struct nfs4_exception exception = { };
3349 int err;
3350
3351 do {
3352 err = nfs4_handle_exception(server,
3353 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3354 &exception);
3355 } while (exception.retry);
3356 return err;
3357}
3358
3359static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3360{
3361 int error;
3362
3363 nfs_fattr_init(fsinfo->fattr);
3364 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3365 if (error == 0)
3366 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3367
3368 return error;
3369}
3370
3371static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3372 struct nfs_pathconf *pathconf)
3373{
3374 struct nfs4_pathconf_arg args = {
3375 .fh = fhandle,
3376 .bitmask = server->attr_bitmask,
3377 };
3378 struct nfs4_pathconf_res res = {
3379 .pathconf = pathconf,
3380 };
3381 struct rpc_message msg = {
3382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3383 .rpc_argp = &args,
3384 .rpc_resp = &res,
3385 };
3386
3387 /* None of the pathconf attributes are mandatory to implement */
3388 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3389 memset(pathconf, 0, sizeof(*pathconf));
3390 return 0;
3391 }
3392
3393 nfs_fattr_init(pathconf->fattr);
3394 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3395}
3396
3397static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3398 struct nfs_pathconf *pathconf)
3399{
3400 struct nfs4_exception exception = { };
3401 int err;
3402
3403 do {
3404 err = nfs4_handle_exception(server,
3405 _nfs4_proc_pathconf(server, fhandle, pathconf),
3406 &exception);
3407 } while (exception.retry);
3408 return err;
3409}
3410
3411void __nfs4_read_done_cb(struct nfs_read_data *data)
3412{
3413 nfs_invalidate_atime(data->header->inode);
3414}
3415
3416static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3417{
3418 struct nfs_server *server = NFS_SERVER(data->header->inode);
3419
3420 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3421 rpc_restart_call_prepare(task);
3422 return -EAGAIN;
3423 }
3424
3425 __nfs4_read_done_cb(data);
3426 if (task->tk_status > 0)
3427 renew_lease(server, data->timestamp);
3428 return 0;
3429}
3430
3431static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3432{
3433
3434 dprintk("--> %s\n", __func__);
3435
3436 if (!nfs4_sequence_done(task, &data->res.seq_res))
3437 return -EAGAIN;
3438
3439 return data->read_done_cb ? data->read_done_cb(task, data) :
3440 nfs4_read_done_cb(task, data);
3441}
3442
3443static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3444{
3445 data->timestamp = jiffies;
3446 data->read_done_cb = nfs4_read_done_cb;
3447 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3448 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3449}
3450
3451static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3452{
3453 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3454 &data->args.seq_args,
3455 &data->res.seq_res,
3456 task))
3457 return;
3458 rpc_call_start(task);
3459}
3460
3461static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3462{
3463 struct inode *inode = data->header->inode;
3464
3465 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3466 rpc_restart_call_prepare(task);
3467 return -EAGAIN;
3468 }
3469 if (task->tk_status >= 0) {
3470 renew_lease(NFS_SERVER(inode), data->timestamp);
3471 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3472 }
3473 return 0;
3474}
3475
3476static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3477{
3478 if (!nfs4_sequence_done(task, &data->res.seq_res))
3479 return -EAGAIN;
3480 return data->write_done_cb ? data->write_done_cb(task, data) :
3481 nfs4_write_done_cb(task, data);
3482}
3483
3484static
3485bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3486{
3487 const struct nfs_pgio_header *hdr = data->header;
3488
3489 /* Don't request attributes for pNFS or O_DIRECT writes */
3490 if (data->ds_clp != NULL || hdr->dreq != NULL)
3491 return false;
3492 /* Otherwise, request attributes if and only if we don't hold
3493 * a delegation
3494 */
3495 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3496}
3497
3498static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3499{
3500 struct nfs_server *server = NFS_SERVER(data->header->inode);
3501
3502 if (!nfs4_write_need_cache_consistency_data(data)) {
3503 data->args.bitmask = NULL;
3504 data->res.fattr = NULL;
3505 } else
3506 data->args.bitmask = server->cache_consistency_bitmask;
3507
3508 if (!data->write_done_cb)
3509 data->write_done_cb = nfs4_write_done_cb;
3510 data->res.server = server;
3511 data->timestamp = jiffies;
3512
3513 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3514 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3515}
3516
3517static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3518{
3519 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3520 &data->args.seq_args,
3521 &data->res.seq_res,
3522 task))
3523 return;
3524 rpc_call_start(task);
3525}
3526
3527static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3528{
3529 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3530 &data->args.seq_args,
3531 &data->res.seq_res,
3532 task))
3533 return;
3534 rpc_call_start(task);
3535}
3536
3537static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3538{
3539 struct inode *inode = data->inode;
3540
3541 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3542 rpc_restart_call_prepare(task);
3543 return -EAGAIN;
3544 }
3545 return 0;
3546}
3547
3548static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3549{
3550 if (!nfs4_sequence_done(task, &data->res.seq_res))
3551 return -EAGAIN;
3552 return data->commit_done_cb(task, data);
3553}
3554
3555static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3556{
3557 struct nfs_server *server = NFS_SERVER(data->inode);
3558
3559 if (data->commit_done_cb == NULL)
3560 data->commit_done_cb = nfs4_commit_done_cb;
3561 data->res.server = server;
3562 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3563 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3564}
3565
3566struct nfs4_renewdata {
3567 struct nfs_client *client;
3568 unsigned long timestamp;
3569};
3570
3571/*
3572 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3573 * standalone procedure for queueing an asynchronous RENEW.
3574 */
3575static void nfs4_renew_release(void *calldata)
3576{
3577 struct nfs4_renewdata *data = calldata;
3578 struct nfs_client *clp = data->client;
3579
3580 if (atomic_read(&clp->cl_count) > 1)
3581 nfs4_schedule_state_renewal(clp);
3582 nfs_put_client(clp);
3583 kfree(data);
3584}
3585
3586static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3587{
3588 struct nfs4_renewdata *data = calldata;
3589 struct nfs_client *clp = data->client;
3590 unsigned long timestamp = data->timestamp;
3591
3592 if (task->tk_status < 0) {
3593 /* Unless we're shutting down, schedule state recovery! */
3594 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3595 return;
3596 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3597 nfs4_schedule_lease_recovery(clp);
3598 return;
3599 }
3600 nfs4_schedule_path_down_recovery(clp);
3601 }
3602 do_renew_lease(clp, timestamp);
3603}
3604
3605static const struct rpc_call_ops nfs4_renew_ops = {
3606 .rpc_call_done = nfs4_renew_done,
3607 .rpc_release = nfs4_renew_release,
3608};
3609
3610static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3611{
3612 struct rpc_message msg = {
3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3614 .rpc_argp = clp,
3615 .rpc_cred = cred,
3616 };
3617 struct nfs4_renewdata *data;
3618
3619 if (renew_flags == 0)
3620 return 0;
3621 if (!atomic_inc_not_zero(&clp->cl_count))
3622 return -EIO;
3623 data = kmalloc(sizeof(*data), GFP_NOFS);
3624 if (data == NULL)
3625 return -ENOMEM;
3626 data->client = clp;
3627 data->timestamp = jiffies;
3628 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3629 &nfs4_renew_ops, data);
3630}
3631
3632static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3633{
3634 struct rpc_message msg = {
3635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3636 .rpc_argp = clp,
3637 .rpc_cred = cred,
3638 };
3639 unsigned long now = jiffies;
3640 int status;
3641
3642 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3643 if (status < 0)
3644 return status;
3645 do_renew_lease(clp, now);
3646 return 0;
3647}
3648
3649static inline int nfs4_server_supports_acls(struct nfs_server *server)
3650{
3651 return (server->caps & NFS_CAP_ACLS)
3652 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3653 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3654}
3655
3656/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3657 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3658 * the stack.
3659 */
3660#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3661
3662static int buf_to_pages_noslab(const void *buf, size_t buflen,
3663 struct page **pages, unsigned int *pgbase)
3664{
3665 struct page *newpage, **spages;
3666 int rc = 0;
3667 size_t len;
3668 spages = pages;
3669
3670 do {
3671 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3672 newpage = alloc_page(GFP_KERNEL);
3673
3674 if (newpage == NULL)
3675 goto unwind;
3676 memcpy(page_address(newpage), buf, len);
3677 buf += len;
3678 buflen -= len;
3679 *pages++ = newpage;
3680 rc++;
3681 } while (buflen != 0);
3682
3683 return rc;
3684
3685unwind:
3686 for(; rc > 0; rc--)
3687 __free_page(spages[rc-1]);
3688 return -ENOMEM;
3689}
3690
3691struct nfs4_cached_acl {
3692 int cached;
3693 size_t len;
3694 char data[0];
3695};
3696
3697static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3698{
3699 struct nfs_inode *nfsi = NFS_I(inode);
3700
3701 spin_lock(&inode->i_lock);
3702 kfree(nfsi->nfs4_acl);
3703 nfsi->nfs4_acl = acl;
3704 spin_unlock(&inode->i_lock);
3705}
3706
3707static void nfs4_zap_acl_attr(struct inode *inode)
3708{
3709 nfs4_set_cached_acl(inode, NULL);
3710}
3711
3712static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3713{
3714 struct nfs_inode *nfsi = NFS_I(inode);
3715 struct nfs4_cached_acl *acl;
3716 int ret = -ENOENT;
3717
3718 spin_lock(&inode->i_lock);
3719 acl = nfsi->nfs4_acl;
3720 if (acl == NULL)
3721 goto out;
3722 if (buf == NULL) /* user is just asking for length */
3723 goto out_len;
3724 if (acl->cached == 0)
3725 goto out;
3726 ret = -ERANGE; /* see getxattr(2) man page */
3727 if (acl->len > buflen)
3728 goto out;
3729 memcpy(buf, acl->data, acl->len);
3730out_len:
3731 ret = acl->len;
3732out:
3733 spin_unlock(&inode->i_lock);
3734 return ret;
3735}
3736
3737static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3738{
3739 struct nfs4_cached_acl *acl;
3740 size_t buflen = sizeof(*acl) + acl_len;
3741
3742 if (pages && buflen <= PAGE_SIZE) {
3743 acl = kmalloc(buflen, GFP_KERNEL);
3744 if (acl == NULL)
3745 goto out;
3746 acl->cached = 1;
3747 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3748 } else {
3749 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3750 if (acl == NULL)
3751 goto out;
3752 acl->cached = 0;
3753 }
3754 acl->len = acl_len;
3755out:
3756 nfs4_set_cached_acl(inode, acl);
3757}
3758
3759/*
3760 * The getxattr API returns the required buffer length when called with a
3761 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3762 * the required buf. On a NULL buf, we send a page of data to the server
3763 * guessing that the ACL request can be serviced by a page. If so, we cache
3764 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3765 * the cache. If not so, we throw away the page, and cache the required
3766 * length. The next getxattr call will then produce another round trip to
3767 * the server, this time with the input buf of the required size.
3768 */
3769static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3770{
3771 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3772 struct nfs_getaclargs args = {
3773 .fh = NFS_FH(inode),
3774 .acl_pages = pages,
3775 .acl_len = buflen,
3776 };
3777 struct nfs_getaclres res = {
3778 .acl_len = buflen,
3779 };
3780 struct rpc_message msg = {
3781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3782 .rpc_argp = &args,
3783 .rpc_resp = &res,
3784 };
3785 int ret = -ENOMEM, npages, i;
3786 size_t acl_len = 0;
3787
3788 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3789 /* As long as we're doing a round trip to the server anyway,
3790 * let's be prepared for a page of acl data. */
3791 if (npages == 0)
3792 npages = 1;
3793
3794 /* Add an extra page to handle the bitmap returned */
3795 npages++;
3796
3797 for (i = 0; i < npages; i++) {
3798 pages[i] = alloc_page(GFP_KERNEL);
3799 if (!pages[i])
3800 goto out_free;
3801 }
3802
3803 /* for decoding across pages */
3804 res.acl_scratch = alloc_page(GFP_KERNEL);
3805 if (!res.acl_scratch)
3806 goto out_free;
3807
3808 args.acl_len = npages * PAGE_SIZE;
3809 args.acl_pgbase = 0;
3810
3811 /* Let decode_getfacl know not to fail if the ACL data is larger than
3812 * the page we send as a guess */
3813 if (buf == NULL)
3814 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3815
3816 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3817 __func__, buf, buflen, npages, args.acl_len);
3818 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3819 &msg, &args.seq_args, &res.seq_res, 0);
3820 if (ret)
3821 goto out_free;
3822
3823 acl_len = res.acl_len;
3824 if (acl_len > args.acl_len)
3825 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3826 else
3827 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3828 acl_len);
3829 if (buf) {
3830 ret = -ERANGE;
3831 if (acl_len > buflen)
3832 goto out_free;
3833 _copy_from_pages(buf, pages, res.acl_data_offset,
3834 acl_len);
3835 }
3836 ret = acl_len;
3837out_free:
3838 for (i = 0; i < npages; i++)
3839 if (pages[i])
3840 __free_page(pages[i]);
3841 if (res.acl_scratch)
3842 __free_page(res.acl_scratch);
3843 return ret;
3844}
3845
3846static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3847{
3848 struct nfs4_exception exception = { };
3849 ssize_t ret;
3850 do {
3851 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3852 if (ret >= 0)
3853 break;
3854 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3855 } while (exception.retry);
3856 return ret;
3857}
3858
3859static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3860{
3861 struct nfs_server *server = NFS_SERVER(inode);
3862 int ret;
3863
3864 if (!nfs4_server_supports_acls(server))
3865 return -EOPNOTSUPP;
3866 ret = nfs_revalidate_inode(server, inode);
3867 if (ret < 0)
3868 return ret;
3869 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3870 nfs_zap_acl_cache(inode);
3871 ret = nfs4_read_cached_acl(inode, buf, buflen);
3872 if (ret != -ENOENT)
3873 /* -ENOENT is returned if there is no ACL or if there is an ACL
3874 * but no cached acl data, just the acl length */
3875 return ret;
3876 return nfs4_get_acl_uncached(inode, buf, buflen);
3877}
3878
3879static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3880{
3881 struct nfs_server *server = NFS_SERVER(inode);
3882 struct page *pages[NFS4ACL_MAXPAGES];
3883 struct nfs_setaclargs arg = {
3884 .fh = NFS_FH(inode),
3885 .acl_pages = pages,
3886 .acl_len = buflen,
3887 };
3888 struct nfs_setaclres res;
3889 struct rpc_message msg = {
3890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3891 .rpc_argp = &arg,
3892 .rpc_resp = &res,
3893 };
3894 int ret, i;
3895
3896 if (!nfs4_server_supports_acls(server))
3897 return -EOPNOTSUPP;
3898 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3899 if (i < 0)
3900 return i;
3901 nfs4_inode_return_delegation(inode);
3902 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3903
3904 /*
3905 * Free each page after tx, so the only ref left is
3906 * held by the network stack
3907 */
3908 for (; i > 0; i--)
3909 put_page(pages[i-1]);
3910
3911 /*
3912 * Acl update can result in inode attribute update.
3913 * so mark the attribute cache invalid.
3914 */
3915 spin_lock(&inode->i_lock);
3916 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3917 spin_unlock(&inode->i_lock);
3918 nfs_access_zap_cache(inode);
3919 nfs_zap_acl_cache(inode);
3920 return ret;
3921}
3922
3923static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3924{
3925 struct nfs4_exception exception = { };
3926 int err;
3927 do {
3928 err = nfs4_handle_exception(NFS_SERVER(inode),
3929 __nfs4_proc_set_acl(inode, buf, buflen),
3930 &exception);
3931 } while (exception.retry);
3932 return err;
3933}
3934
3935static int
3936nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3937{
3938 struct nfs_client *clp = server->nfs_client;
3939
3940 if (task->tk_status >= 0)
3941 return 0;
3942 switch(task->tk_status) {
3943 case -NFS4ERR_DELEG_REVOKED:
3944 case -NFS4ERR_ADMIN_REVOKED:
3945 case -NFS4ERR_BAD_STATEID:
3946 if (state == NULL)
3947 break;
3948 nfs_remove_bad_delegation(state->inode);
3949 case -NFS4ERR_OPENMODE:
3950 if (state == NULL)
3951 break;
3952 nfs4_schedule_stateid_recovery(server, state);
3953 goto wait_on_recovery;
3954 case -NFS4ERR_EXPIRED:
3955 if (state != NULL)
3956 nfs4_schedule_stateid_recovery(server, state);
3957 case -NFS4ERR_STALE_STATEID:
3958 case -NFS4ERR_STALE_CLIENTID:
3959 nfs4_schedule_lease_recovery(clp);
3960 goto wait_on_recovery;
3961#if defined(CONFIG_NFS_V4_1)
3962 case -NFS4ERR_BADSESSION:
3963 case -NFS4ERR_BADSLOT:
3964 case -NFS4ERR_BAD_HIGH_SLOT:
3965 case -NFS4ERR_DEADSESSION:
3966 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3967 case -NFS4ERR_SEQ_FALSE_RETRY:
3968 case -NFS4ERR_SEQ_MISORDERED:
3969 dprintk("%s ERROR %d, Reset session\n", __func__,
3970 task->tk_status);
3971 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3972 task->tk_status = 0;
3973 return -EAGAIN;
3974#endif /* CONFIG_NFS_V4_1 */
3975 case -NFS4ERR_DELAY:
3976 nfs_inc_server_stats(server, NFSIOS_DELAY);
3977 case -NFS4ERR_GRACE:
3978 case -EKEYEXPIRED:
3979 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3980 task->tk_status = 0;
3981 return -EAGAIN;
3982 case -NFS4ERR_RETRY_UNCACHED_REP:
3983 case -NFS4ERR_OLD_STATEID:
3984 task->tk_status = 0;
3985 return -EAGAIN;
3986 }
3987 task->tk_status = nfs4_map_errors(task->tk_status);
3988 return 0;
3989wait_on_recovery:
3990 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3991 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3992 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3993 task->tk_status = 0;
3994 return -EAGAIN;
3995}
3996
3997static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3998 nfs4_verifier *bootverf)
3999{
4000 __be32 verf[2];
4001
4002 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4003 /* An impossible timestamp guarantees this value
4004 * will never match a generated boot time. */
4005 verf[0] = 0;
4006 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4007 } else {
4008 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4009 verf[0] = (__be32)nn->boot_time.tv_sec;
4010 verf[1] = (__be32)nn->boot_time.tv_nsec;
4011 }
4012 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4013}
4014
4015/**
4016 * nfs4_proc_setclientid - Negotiate client ID
4017 * @clp: state data structure
4018 * @program: RPC program for NFSv4 callback service
4019 * @port: IP port number for NFS4 callback service
4020 * @cred: RPC credential to use for this call
4021 * @res: where to place the result
4022 *
4023 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4024 */
4025int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4026 unsigned short port, struct rpc_cred *cred,
4027 struct nfs4_setclientid_res *res)
4028{
4029 nfs4_verifier sc_verifier;
4030 struct nfs4_setclientid setclientid = {
4031 .sc_verifier = &sc_verifier,
4032 .sc_prog = program,
4033 .sc_cb_ident = clp->cl_cb_ident,
4034 };
4035 struct rpc_message msg = {
4036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4037 .rpc_argp = &setclientid,
4038 .rpc_resp = res,
4039 .rpc_cred = cred,
4040 };
4041 int status;
4042
4043 /* nfs_client_id4 */
4044 nfs4_init_boot_verifier(clp, &sc_verifier);
4045 rcu_read_lock();
4046 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4047 sizeof(setclientid.sc_name), "%s/%s %s",
4048 clp->cl_ipaddr,
4049 rpc_peeraddr2str(clp->cl_rpcclient,
4050 RPC_DISPLAY_ADDR),
4051 rpc_peeraddr2str(clp->cl_rpcclient,
4052 RPC_DISPLAY_PROTO));
4053 /* cb_client4 */
4054 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4055 sizeof(setclientid.sc_netid),
4056 rpc_peeraddr2str(clp->cl_rpcclient,
4057 RPC_DISPLAY_NETID));
4058 rcu_read_unlock();
4059 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4060 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4061 clp->cl_ipaddr, port >> 8, port & 255);
4062
4063 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4064 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4065 setclientid.sc_name_len, setclientid.sc_name);
4066 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4067 dprintk("NFS reply setclientid: %d\n", status);
4068 return status;
4069}
4070
4071/**
4072 * nfs4_proc_setclientid_confirm - Confirm client ID
4073 * @clp: state data structure
4074 * @res: result of a previous SETCLIENTID
4075 * @cred: RPC credential to use for this call
4076 *
4077 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4078 */
4079int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4080 struct nfs4_setclientid_res *arg,
4081 struct rpc_cred *cred)
4082{
4083 struct nfs_fsinfo fsinfo;
4084 struct rpc_message msg = {
4085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4086 .rpc_argp = arg,
4087 .rpc_resp = &fsinfo,
4088 .rpc_cred = cred,
4089 };
4090 unsigned long now;
4091 int status;
4092
4093 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4094 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4095 clp->cl_clientid);
4096 now = jiffies;
4097 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4098 if (status == 0) {
4099 spin_lock(&clp->cl_lock);
4100 clp->cl_lease_time = fsinfo.lease_time * HZ;
4101 clp->cl_last_renewal = now;
4102 spin_unlock(&clp->cl_lock);
4103 }
4104 dprintk("NFS reply setclientid_confirm: %d\n", status);
4105 return status;
4106}
4107
4108struct nfs4_delegreturndata {
4109 struct nfs4_delegreturnargs args;
4110 struct nfs4_delegreturnres res;
4111 struct nfs_fh fh;
4112 nfs4_stateid stateid;
4113 unsigned long timestamp;
4114 struct nfs_fattr fattr;
4115 int rpc_status;
4116};
4117
4118static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4119{
4120 struct nfs4_delegreturndata *data = calldata;
4121
4122 if (!nfs4_sequence_done(task, &data->res.seq_res))
4123 return;
4124
4125 switch (task->tk_status) {
4126 case -NFS4ERR_STALE_STATEID:
4127 case -NFS4ERR_EXPIRED:
4128 case 0:
4129 renew_lease(data->res.server, data->timestamp);
4130 break;
4131 default:
4132 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4133 -EAGAIN) {
4134 rpc_restart_call_prepare(task);
4135 return;
4136 }
4137 }
4138 data->rpc_status = task->tk_status;
4139}
4140
4141static void nfs4_delegreturn_release(void *calldata)
4142{
4143 kfree(calldata);
4144}
4145
4146#if defined(CONFIG_NFS_V4_1)
4147static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4148{
4149 struct nfs4_delegreturndata *d_data;
4150
4151 d_data = (struct nfs4_delegreturndata *)data;
4152
4153 if (nfs4_setup_sequence(d_data->res.server,
4154 &d_data->args.seq_args,
4155 &d_data->res.seq_res, task))
4156 return;
4157 rpc_call_start(task);
4158}
4159#endif /* CONFIG_NFS_V4_1 */
4160
4161static const struct rpc_call_ops nfs4_delegreturn_ops = {
4162#if defined(CONFIG_NFS_V4_1)
4163 .rpc_call_prepare = nfs4_delegreturn_prepare,
4164#endif /* CONFIG_NFS_V4_1 */
4165 .rpc_call_done = nfs4_delegreturn_done,
4166 .rpc_release = nfs4_delegreturn_release,
4167};
4168
4169static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4170{
4171 struct nfs4_delegreturndata *data;
4172 struct nfs_server *server = NFS_SERVER(inode);
4173 struct rpc_task *task;
4174 struct rpc_message msg = {
4175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4176 .rpc_cred = cred,
4177 };
4178 struct rpc_task_setup task_setup_data = {
4179 .rpc_client = server->client,
4180 .rpc_message = &msg,
4181 .callback_ops = &nfs4_delegreturn_ops,
4182 .flags = RPC_TASK_ASYNC,
4183 };
4184 int status = 0;
4185
4186 data = kzalloc(sizeof(*data), GFP_NOFS);
4187 if (data == NULL)
4188 return -ENOMEM;
4189 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4190 data->args.fhandle = &data->fh;
4191 data->args.stateid = &data->stateid;
4192 data->args.bitmask = server->cache_consistency_bitmask;
4193 nfs_copy_fh(&data->fh, NFS_FH(inode));
4194 nfs4_stateid_copy(&data->stateid, stateid);
4195 data->res.fattr = &data->fattr;
4196 data->res.server = server;
4197 nfs_fattr_init(data->res.fattr);
4198 data->timestamp = jiffies;
4199 data->rpc_status = 0;
4200
4201 task_setup_data.callback_data = data;
4202 msg.rpc_argp = &data->args;
4203 msg.rpc_resp = &data->res;
4204 task = rpc_run_task(&task_setup_data);
4205 if (IS_ERR(task))
4206 return PTR_ERR(task);
4207 if (!issync)
4208 goto out;
4209 status = nfs4_wait_for_completion_rpc_task(task);
4210 if (status != 0)
4211 goto out;
4212 status = data->rpc_status;
4213 if (status == 0)
4214 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4215 else
4216 nfs_refresh_inode(inode, &data->fattr);
4217out:
4218 rpc_put_task(task);
4219 return status;
4220}
4221
4222int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4223{
4224 struct nfs_server *server = NFS_SERVER(inode);
4225 struct nfs4_exception exception = { };
4226 int err;
4227 do {
4228 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4229 switch (err) {
4230 case -NFS4ERR_STALE_STATEID:
4231 case -NFS4ERR_EXPIRED:
4232 case 0:
4233 return 0;
4234 }
4235 err = nfs4_handle_exception(server, err, &exception);
4236 } while (exception.retry);
4237 return err;
4238}
4239
4240#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4241#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4242
4243/*
4244 * sleep, with exponential backoff, and retry the LOCK operation.
4245 */
4246static unsigned long
4247nfs4_set_lock_task_retry(unsigned long timeout)
4248{
4249 freezable_schedule_timeout_killable(timeout);
4250 timeout <<= 1;
4251 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4252 return NFS4_LOCK_MAXTIMEOUT;
4253 return timeout;
4254}
4255
4256static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4257{
4258 struct inode *inode = state->inode;
4259 struct nfs_server *server = NFS_SERVER(inode);
4260 struct nfs_client *clp = server->nfs_client;
4261 struct nfs_lockt_args arg = {
4262 .fh = NFS_FH(inode),
4263 .fl = request,
4264 };
4265 struct nfs_lockt_res res = {
4266 .denied = request,
4267 };
4268 struct rpc_message msg = {
4269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4270 .rpc_argp = &arg,
4271 .rpc_resp = &res,
4272 .rpc_cred = state->owner->so_cred,
4273 };
4274 struct nfs4_lock_state *lsp;
4275 int status;
4276
4277 arg.lock_owner.clientid = clp->cl_clientid;
4278 status = nfs4_set_lock_state(state, request);
4279 if (status != 0)
4280 goto out;
4281 lsp = request->fl_u.nfs4_fl.owner;
4282 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4283 arg.lock_owner.s_dev = server->s_dev;
4284 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4285 switch (status) {
4286 case 0:
4287 request->fl_type = F_UNLCK;
4288 break;
4289 case -NFS4ERR_DENIED:
4290 status = 0;
4291 }
4292 request->fl_ops->fl_release_private(request);
4293out:
4294 return status;
4295}
4296
4297static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4298{
4299 struct nfs4_exception exception = { };
4300 int err;
4301
4302 do {
4303 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4304 _nfs4_proc_getlk(state, cmd, request),
4305 &exception);
4306 } while (exception.retry);
4307 return err;
4308}
4309
4310static int do_vfs_lock(struct file *file, struct file_lock *fl)
4311{
4312 int res = 0;
4313 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4314 case FL_POSIX:
4315 res = posix_lock_file_wait(file, fl);
4316 break;
4317 case FL_FLOCK:
4318 res = flock_lock_file_wait(file, fl);
4319 break;
4320 default:
4321 BUG();
4322 }
4323 return res;
4324}
4325
4326struct nfs4_unlockdata {
4327 struct nfs_locku_args arg;
4328 struct nfs_locku_res res;
4329 struct nfs4_lock_state *lsp;
4330 struct nfs_open_context *ctx;
4331 struct file_lock fl;
4332 const struct nfs_server *server;
4333 unsigned long timestamp;
4334};
4335
4336static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4337 struct nfs_open_context *ctx,
4338 struct nfs4_lock_state *lsp,
4339 struct nfs_seqid *seqid)
4340{
4341 struct nfs4_unlockdata *p;
4342 struct inode *inode = lsp->ls_state->inode;
4343
4344 p = kzalloc(sizeof(*p), GFP_NOFS);
4345 if (p == NULL)
4346 return NULL;
4347 p->arg.fh = NFS_FH(inode);
4348 p->arg.fl = &p->fl;
4349 p->arg.seqid = seqid;
4350 p->res.seqid = seqid;
4351 p->arg.stateid = &lsp->ls_stateid;
4352 p->lsp = lsp;
4353 atomic_inc(&lsp->ls_count);
4354 /* Ensure we don't close file until we're done freeing locks! */
4355 p->ctx = get_nfs_open_context(ctx);
4356 memcpy(&p->fl, fl, sizeof(p->fl));
4357 p->server = NFS_SERVER(inode);
4358 return p;
4359}
4360
4361static void nfs4_locku_release_calldata(void *data)
4362{
4363 struct nfs4_unlockdata *calldata = data;
4364 nfs_free_seqid(calldata->arg.seqid);
4365 nfs4_put_lock_state(calldata->lsp);
4366 put_nfs_open_context(calldata->ctx);
4367 kfree(calldata);
4368}
4369
4370static void nfs4_locku_done(struct rpc_task *task, void *data)
4371{
4372 struct nfs4_unlockdata *calldata = data;
4373
4374 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4375 return;
4376 switch (task->tk_status) {
4377 case 0:
4378 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4379 &calldata->res.stateid);
4380 renew_lease(calldata->server, calldata->timestamp);
4381 break;
4382 case -NFS4ERR_BAD_STATEID:
4383 case -NFS4ERR_OLD_STATEID:
4384 case -NFS4ERR_STALE_STATEID:
4385 case -NFS4ERR_EXPIRED:
4386 break;
4387 default:
4388 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4389 rpc_restart_call_prepare(task);
4390 }
4391}
4392
4393static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4394{
4395 struct nfs4_unlockdata *calldata = data;
4396
4397 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4398 return;
4399 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4400 /* Note: exit _without_ running nfs4_locku_done */
4401 task->tk_action = NULL;
4402 return;
4403 }
4404 calldata->timestamp = jiffies;
4405 if (nfs4_setup_sequence(calldata->server,
4406 &calldata->arg.seq_args,
4407 &calldata->res.seq_res, task))
4408 return;
4409 rpc_call_start(task);
4410}
4411
4412static const struct rpc_call_ops nfs4_locku_ops = {
4413 .rpc_call_prepare = nfs4_locku_prepare,
4414 .rpc_call_done = nfs4_locku_done,
4415 .rpc_release = nfs4_locku_release_calldata,
4416};
4417
4418static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4419 struct nfs_open_context *ctx,
4420 struct nfs4_lock_state *lsp,
4421 struct nfs_seqid *seqid)
4422{
4423 struct nfs4_unlockdata *data;
4424 struct rpc_message msg = {
4425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4426 .rpc_cred = ctx->cred,
4427 };
4428 struct rpc_task_setup task_setup_data = {
4429 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4430 .rpc_message = &msg,
4431 .callback_ops = &nfs4_locku_ops,
4432 .workqueue = nfsiod_workqueue,
4433 .flags = RPC_TASK_ASYNC,
4434 };
4435
4436 /* Ensure this is an unlock - when canceling a lock, the
4437 * canceled lock is passed in, and it won't be an unlock.
4438 */
4439 fl->fl_type = F_UNLCK;
4440
4441 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4442 if (data == NULL) {
4443 nfs_free_seqid(seqid);
4444 return ERR_PTR(-ENOMEM);
4445 }
4446
4447 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4448 msg.rpc_argp = &data->arg;
4449 msg.rpc_resp = &data->res;
4450 task_setup_data.callback_data = data;
4451 return rpc_run_task(&task_setup_data);
4452}
4453
4454static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4455{
4456 struct nfs_inode *nfsi = NFS_I(state->inode);
4457 struct nfs_seqid *seqid;
4458 struct nfs4_lock_state *lsp;
4459 struct rpc_task *task;
4460 int status = 0;
4461 unsigned char fl_flags = request->fl_flags;
4462
4463 status = nfs4_set_lock_state(state, request);
4464 /* Unlock _before_ we do the RPC call */
4465 request->fl_flags |= FL_EXISTS;
4466 down_read(&nfsi->rwsem);
4467 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4468 up_read(&nfsi->rwsem);
4469 goto out;
4470 }
4471 up_read(&nfsi->rwsem);
4472 if (status != 0)
4473 goto out;
4474 /* Is this a delegated lock? */
4475 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4476 goto out;
4477 lsp = request->fl_u.nfs4_fl.owner;
4478 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4479 status = -ENOMEM;
4480 if (seqid == NULL)
4481 goto out;
4482 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4483 status = PTR_ERR(task);
4484 if (IS_ERR(task))
4485 goto out;
4486 status = nfs4_wait_for_completion_rpc_task(task);
4487 rpc_put_task(task);
4488out:
4489 request->fl_flags = fl_flags;
4490 return status;
4491}
4492
4493struct nfs4_lockdata {
4494 struct nfs_lock_args arg;
4495 struct nfs_lock_res res;
4496 struct nfs4_lock_state *lsp;
4497 struct nfs_open_context *ctx;
4498 struct file_lock fl;
4499 unsigned long timestamp;
4500 int rpc_status;
4501 int cancelled;
4502 struct nfs_server *server;
4503};
4504
4505static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4506 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4507 gfp_t gfp_mask)
4508{
4509 struct nfs4_lockdata *p;
4510 struct inode *inode = lsp->ls_state->inode;
4511 struct nfs_server *server = NFS_SERVER(inode);
4512
4513 p = kzalloc(sizeof(*p), gfp_mask);
4514 if (p == NULL)
4515 return NULL;
4516
4517 p->arg.fh = NFS_FH(inode);
4518 p->arg.fl = &p->fl;
4519 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4520 if (p->arg.open_seqid == NULL)
4521 goto out_free;
4522 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4523 if (p->arg.lock_seqid == NULL)
4524 goto out_free_seqid;
4525 p->arg.lock_stateid = &lsp->ls_stateid;
4526 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4527 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4528 p->arg.lock_owner.s_dev = server->s_dev;
4529 p->res.lock_seqid = p->arg.lock_seqid;
4530 p->lsp = lsp;
4531 p->server = server;
4532 atomic_inc(&lsp->ls_count);
4533 p->ctx = get_nfs_open_context(ctx);
4534 memcpy(&p->fl, fl, sizeof(p->fl));
4535 return p;
4536out_free_seqid:
4537 nfs_free_seqid(p->arg.open_seqid);
4538out_free:
4539 kfree(p);
4540 return NULL;
4541}
4542
4543static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4544{
4545 struct nfs4_lockdata *data = calldata;
4546 struct nfs4_state *state = data->lsp->ls_state;
4547
4548 dprintk("%s: begin!\n", __func__);
4549 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4550 return;
4551 /* Do we need to do an open_to_lock_owner? */
4552 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4553 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4554 return;
4555 data->arg.open_stateid = &state->stateid;
4556 data->arg.new_lock_owner = 1;
4557 data->res.open_seqid = data->arg.open_seqid;
4558 } else
4559 data->arg.new_lock_owner = 0;
4560 data->timestamp = jiffies;
4561 if (nfs4_setup_sequence(data->server,
4562 &data->arg.seq_args,
4563 &data->res.seq_res, task))
4564 return;
4565 rpc_call_start(task);
4566 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4567}
4568
4569static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4570{
4571 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4572 nfs4_lock_prepare(task, calldata);
4573}
4574
4575static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4576{
4577 struct nfs4_lockdata *data = calldata;
4578
4579 dprintk("%s: begin!\n", __func__);
4580
4581 if (!nfs4_sequence_done(task, &data->res.seq_res))
4582 return;
4583
4584 data->rpc_status = task->tk_status;
4585 if (data->arg.new_lock_owner != 0) {
4586 if (data->rpc_status == 0)
4587 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4588 else
4589 goto out;
4590 }
4591 if (data->rpc_status == 0) {
4592 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4593 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4594 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4595 }
4596out:
4597 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4598}
4599
4600static void nfs4_lock_release(void *calldata)
4601{
4602 struct nfs4_lockdata *data = calldata;
4603
4604 dprintk("%s: begin!\n", __func__);
4605 nfs_free_seqid(data->arg.open_seqid);
4606 if (data->cancelled != 0) {
4607 struct rpc_task *task;
4608 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4609 data->arg.lock_seqid);
4610 if (!IS_ERR(task))
4611 rpc_put_task_async(task);
4612 dprintk("%s: cancelling lock!\n", __func__);
4613 } else
4614 nfs_free_seqid(data->arg.lock_seqid);
4615 nfs4_put_lock_state(data->lsp);
4616 put_nfs_open_context(data->ctx);
4617 kfree(data);
4618 dprintk("%s: done!\n", __func__);
4619}
4620
4621static const struct rpc_call_ops nfs4_lock_ops = {
4622 .rpc_call_prepare = nfs4_lock_prepare,
4623 .rpc_call_done = nfs4_lock_done,
4624 .rpc_release = nfs4_lock_release,
4625};
4626
4627static const struct rpc_call_ops nfs4_recover_lock_ops = {
4628 .rpc_call_prepare = nfs4_recover_lock_prepare,
4629 .rpc_call_done = nfs4_lock_done,
4630 .rpc_release = nfs4_lock_release,
4631};
4632
4633static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4634{
4635 switch (error) {
4636 case -NFS4ERR_ADMIN_REVOKED:
4637 case -NFS4ERR_BAD_STATEID:
4638 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4639 if (new_lock_owner != 0 ||
4640 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4641 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4642 break;
4643 case -NFS4ERR_STALE_STATEID:
4644 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4645 case -NFS4ERR_EXPIRED:
4646 nfs4_schedule_lease_recovery(server->nfs_client);
4647 };
4648}
4649
4650static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4651{
4652 struct nfs4_lockdata *data;
4653 struct rpc_task *task;
4654 struct rpc_message msg = {
4655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4656 .rpc_cred = state->owner->so_cred,
4657 };
4658 struct rpc_task_setup task_setup_data = {
4659 .rpc_client = NFS_CLIENT(state->inode),
4660 .rpc_message = &msg,
4661 .callback_ops = &nfs4_lock_ops,
4662 .workqueue = nfsiod_workqueue,
4663 .flags = RPC_TASK_ASYNC,
4664 };
4665 int ret;
4666
4667 dprintk("%s: begin!\n", __func__);
4668 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4669 fl->fl_u.nfs4_fl.owner,
4670 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4671 if (data == NULL)
4672 return -ENOMEM;
4673 if (IS_SETLKW(cmd))
4674 data->arg.block = 1;
4675 if (recovery_type > NFS_LOCK_NEW) {
4676 if (recovery_type == NFS_LOCK_RECLAIM)
4677 data->arg.reclaim = NFS_LOCK_RECLAIM;
4678 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4679 }
4680 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4681 msg.rpc_argp = &data->arg;
4682 msg.rpc_resp = &data->res;
4683 task_setup_data.callback_data = data;
4684 task = rpc_run_task(&task_setup_data);
4685 if (IS_ERR(task))
4686 return PTR_ERR(task);
4687 ret = nfs4_wait_for_completion_rpc_task(task);
4688 if (ret == 0) {
4689 ret = data->rpc_status;
4690 if (ret)
4691 nfs4_handle_setlk_error(data->server, data->lsp,
4692 data->arg.new_lock_owner, ret);
4693 } else
4694 data->cancelled = 1;
4695 rpc_put_task(task);
4696 dprintk("%s: done, ret = %d!\n", __func__, ret);
4697 return ret;
4698}
4699
4700static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4701{
4702 struct nfs_server *server = NFS_SERVER(state->inode);
4703 struct nfs4_exception exception = {
4704 .inode = state->inode,
4705 };
4706 int err;
4707
4708 do {
4709 /* Cache the lock if possible... */
4710 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4711 return 0;
4712 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4713 if (err != -NFS4ERR_DELAY)
4714 break;
4715 nfs4_handle_exception(server, err, &exception);
4716 } while (exception.retry);
4717 return err;
4718}
4719
4720static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4721{
4722 struct nfs_server *server = NFS_SERVER(state->inode);
4723 struct nfs4_exception exception = {
4724 .inode = state->inode,
4725 };
4726 int err;
4727
4728 err = nfs4_set_lock_state(state, request);
4729 if (err != 0)
4730 return err;
4731 do {
4732 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4733 return 0;
4734 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4735 switch (err) {
4736 default:
4737 goto out;
4738 case -NFS4ERR_GRACE:
4739 case -NFS4ERR_DELAY:
4740 nfs4_handle_exception(server, err, &exception);
4741 err = 0;
4742 }
4743 } while (exception.retry);
4744out:
4745 return err;
4746}
4747
4748#if defined(CONFIG_NFS_V4_1)
4749/**
4750 * nfs41_check_expired_locks - possibly free a lock stateid
4751 *
4752 * @state: NFSv4 state for an inode
4753 *
4754 * Returns NFS_OK if recovery for this stateid is now finished.
4755 * Otherwise a negative NFS4ERR value is returned.
4756 */
4757static int nfs41_check_expired_locks(struct nfs4_state *state)
4758{
4759 int status, ret = -NFS4ERR_BAD_STATEID;
4760 struct nfs4_lock_state *lsp;
4761 struct nfs_server *server = NFS_SERVER(state->inode);
4762
4763 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4764 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4765 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4766 if (status != NFS_OK) {
4767 /* Free the stateid unless the server
4768 * informs us the stateid is unrecognized. */
4769 if (status != -NFS4ERR_BAD_STATEID)
4770 nfs41_free_stateid(server,
4771 &lsp->ls_stateid);
4772 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4773 ret = status;
4774 }
4775 }
4776 };
4777
4778 return ret;
4779}
4780
4781static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4782{
4783 int status = NFS_OK;
4784
4785 if (test_bit(LK_STATE_IN_USE, &state->flags))
4786 status = nfs41_check_expired_locks(state);
4787 if (status != NFS_OK)
4788 status = nfs4_lock_expired(state, request);
4789 return status;
4790}
4791#endif
4792
4793static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4794{
4795 struct nfs_inode *nfsi = NFS_I(state->inode);
4796 unsigned char fl_flags = request->fl_flags;
4797 int status = -ENOLCK;
4798
4799 if ((fl_flags & FL_POSIX) &&
4800 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4801 goto out;
4802 /* Is this a delegated open? */
4803 status = nfs4_set_lock_state(state, request);
4804 if (status != 0)
4805 goto out;
4806 request->fl_flags |= FL_ACCESS;
4807 status = do_vfs_lock(request->fl_file, request);
4808 if (status < 0)
4809 goto out;
4810 down_read(&nfsi->rwsem);
4811 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4812 /* Yes: cache locks! */
4813 /* ...but avoid races with delegation recall... */
4814 request->fl_flags = fl_flags & ~FL_SLEEP;
4815 status = do_vfs_lock(request->fl_file, request);
4816 goto out_unlock;
4817 }
4818 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4819 if (status != 0)
4820 goto out_unlock;
4821 /* Note: we always want to sleep here! */
4822 request->fl_flags = fl_flags | FL_SLEEP;
4823 if (do_vfs_lock(request->fl_file, request) < 0)
4824 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4825 "manager!\n", __func__);
4826out_unlock:
4827 up_read(&nfsi->rwsem);
4828out:
4829 request->fl_flags = fl_flags;
4830 return status;
4831}
4832
4833static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4834{
4835 struct nfs4_exception exception = {
4836 .state = state,
4837 .inode = state->inode,
4838 };
4839 int err;
4840
4841 do {
4842 err = _nfs4_proc_setlk(state, cmd, request);
4843 if (err == -NFS4ERR_DENIED)
4844 err = -EAGAIN;
4845 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4846 err, &exception);
4847 } while (exception.retry);
4848 return err;
4849}
4850
4851static int
4852nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4853{
4854 struct nfs_open_context *ctx;
4855 struct nfs4_state *state;
4856 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4857 int status;
4858
4859 /* verify open state */
4860 ctx = nfs_file_open_context(filp);
4861 state = ctx->state;
4862
4863 if (request->fl_start < 0 || request->fl_end < 0)
4864 return -EINVAL;
4865
4866 if (IS_GETLK(cmd)) {
4867 if (state != NULL)
4868 return nfs4_proc_getlk(state, F_GETLK, request);
4869 return 0;
4870 }
4871
4872 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4873 return -EINVAL;
4874
4875 if (request->fl_type == F_UNLCK) {
4876 if (state != NULL)
4877 return nfs4_proc_unlck(state, cmd, request);
4878 return 0;
4879 }
4880
4881 if (state == NULL)
4882 return -ENOLCK;
4883 /*
4884 * Don't rely on the VFS having checked the file open mode,
4885 * since it won't do this for flock() locks.
4886 */
4887 switch (request->fl_type) {
4888 case F_RDLCK:
4889 if (!(filp->f_mode & FMODE_READ))
4890 return -EBADF;
4891 break;
4892 case F_WRLCK:
4893 if (!(filp->f_mode & FMODE_WRITE))
4894 return -EBADF;
4895 }
4896
4897 do {
4898 status = nfs4_proc_setlk(state, cmd, request);
4899 if ((status != -EAGAIN) || IS_SETLK(cmd))
4900 break;
4901 timeout = nfs4_set_lock_task_retry(timeout);
4902 status = -ERESTARTSYS;
4903 if (signalled())
4904 break;
4905 } while(status < 0);
4906 return status;
4907}
4908
4909int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4910{
4911 struct nfs_server *server = NFS_SERVER(state->inode);
4912 struct nfs4_exception exception = { };
4913 int err;
4914
4915 err = nfs4_set_lock_state(state, fl);
4916 if (err != 0)
4917 goto out;
4918 do {
4919 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4920 switch (err) {
4921 default:
4922 printk(KERN_ERR "NFS: %s: unhandled error "
4923 "%d.\n", __func__, err);
4924 case 0:
4925 case -ESTALE:
4926 goto out;
4927 case -NFS4ERR_EXPIRED:
4928 nfs4_schedule_stateid_recovery(server, state);
4929 case -NFS4ERR_STALE_CLIENTID:
4930 case -NFS4ERR_STALE_STATEID:
4931 nfs4_schedule_lease_recovery(server->nfs_client);
4932 goto out;
4933 case -NFS4ERR_BADSESSION:
4934 case -NFS4ERR_BADSLOT:
4935 case -NFS4ERR_BAD_HIGH_SLOT:
4936 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4937 case -NFS4ERR_DEADSESSION:
4938 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4939 goto out;
4940 case -ERESTARTSYS:
4941 /*
4942 * The show must go on: exit, but mark the
4943 * stateid as needing recovery.
4944 */
4945 case -NFS4ERR_DELEG_REVOKED:
4946 case -NFS4ERR_ADMIN_REVOKED:
4947 case -NFS4ERR_BAD_STATEID:
4948 case -NFS4ERR_OPENMODE:
4949 nfs4_schedule_stateid_recovery(server, state);
4950 err = 0;
4951 goto out;
4952 case -EKEYEXPIRED:
4953 /*
4954 * User RPCSEC_GSS context has expired.
4955 * We cannot recover this stateid now, so
4956 * skip it and allow recovery thread to
4957 * proceed.
4958 */
4959 err = 0;
4960 goto out;
4961 case -ENOMEM:
4962 case -NFS4ERR_DENIED:
4963 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4964 err = 0;
4965 goto out;
4966 case -NFS4ERR_DELAY:
4967 break;
4968 }
4969 err = nfs4_handle_exception(server, err, &exception);
4970 } while (exception.retry);
4971out:
4972 return err;
4973}
4974
4975struct nfs_release_lockowner_data {
4976 struct nfs4_lock_state *lsp;
4977 struct nfs_server *server;
4978 struct nfs_release_lockowner_args args;
4979};
4980
4981static void nfs4_release_lockowner_release(void *calldata)
4982{
4983 struct nfs_release_lockowner_data *data = calldata;
4984 nfs4_free_lock_state(data->server, data->lsp);
4985 kfree(calldata);
4986}
4987
4988static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4989 .rpc_release = nfs4_release_lockowner_release,
4990};
4991
4992int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4993{
4994 struct nfs_server *server = lsp->ls_state->owner->so_server;
4995 struct nfs_release_lockowner_data *data;
4996 struct rpc_message msg = {
4997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4998 };
4999
5000 if (server->nfs_client->cl_mvops->minor_version != 0)
5001 return -EINVAL;
5002 data = kmalloc(sizeof(*data), GFP_NOFS);
5003 if (!data)
5004 return -ENOMEM;
5005 data->lsp = lsp;
5006 data->server = server;
5007 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5008 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5009 data->args.lock_owner.s_dev = server->s_dev;
5010 msg.rpc_argp = &data->args;
5011 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5012 return 0;
5013}
5014
5015#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5016
5017static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5018 const void *buf, size_t buflen,
5019 int flags, int type)
5020{
5021 if (strcmp(key, "") != 0)
5022 return -EINVAL;
5023
5024 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5025}
5026
5027static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5028 void *buf, size_t buflen, int type)
5029{
5030 if (strcmp(key, "") != 0)
5031 return -EINVAL;
5032
5033 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5034}
5035
5036static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5037 size_t list_len, const char *name,
5038 size_t name_len, int type)
5039{
5040 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5041
5042 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5043 return 0;
5044
5045 if (list && len <= list_len)
5046 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5047 return len;
5048}
5049
5050/*
5051 * nfs_fhget will use either the mounted_on_fileid or the fileid
5052 */
5053static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5054{
5055 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5056 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5057 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5058 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5059 return;
5060
5061 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5062 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5063 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5064 fattr->nlink = 2;
5065}
5066
5067static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5068 const struct qstr *name,
5069 struct nfs4_fs_locations *fs_locations,
5070 struct page *page)
5071{
5072 struct nfs_server *server = NFS_SERVER(dir);
5073 u32 bitmask[2] = {
5074 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5075 };
5076 struct nfs4_fs_locations_arg args = {
5077 .dir_fh = NFS_FH(dir),
5078 .name = name,
5079 .page = page,
5080 .bitmask = bitmask,
5081 };
5082 struct nfs4_fs_locations_res res = {
5083 .fs_locations = fs_locations,
5084 };
5085 struct rpc_message msg = {
5086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5087 .rpc_argp = &args,
5088 .rpc_resp = &res,
5089 };
5090 int status;
5091
5092 dprintk("%s: start\n", __func__);
5093
5094 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5095 * is not supported */
5096 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5097 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5098 else
5099 bitmask[0] |= FATTR4_WORD0_FILEID;
5100
5101 nfs_fattr_init(&fs_locations->fattr);
5102 fs_locations->server = server;
5103 fs_locations->nlocations = 0;
5104 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5105 dprintk("%s: returned status = %d\n", __func__, status);
5106 return status;
5107}
5108
5109int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5110 const struct qstr *name,
5111 struct nfs4_fs_locations *fs_locations,
5112 struct page *page)
5113{
5114 struct nfs4_exception exception = { };
5115 int err;
5116 do {
5117 err = nfs4_handle_exception(NFS_SERVER(dir),
5118 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5119 &exception);
5120 } while (exception.retry);
5121 return err;
5122}
5123
5124static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5125{
5126 int status;
5127 struct nfs4_secinfo_arg args = {
5128 .dir_fh = NFS_FH(dir),
5129 .name = name,
5130 };
5131 struct nfs4_secinfo_res res = {
5132 .flavors = flavors,
5133 };
5134 struct rpc_message msg = {
5135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5136 .rpc_argp = &args,
5137 .rpc_resp = &res,
5138 };
5139
5140 dprintk("NFS call secinfo %s\n", name->name);
5141 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5142 dprintk("NFS reply secinfo: %d\n", status);
5143 return status;
5144}
5145
5146int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5147 struct nfs4_secinfo_flavors *flavors)
5148{
5149 struct nfs4_exception exception = { };
5150 int err;
5151 do {
5152 err = nfs4_handle_exception(NFS_SERVER(dir),
5153 _nfs4_proc_secinfo(dir, name, flavors),
5154 &exception);
5155 } while (exception.retry);
5156 return err;
5157}
5158
5159#ifdef CONFIG_NFS_V4_1
5160/*
5161 * Check the exchange flags returned by the server for invalid flags, having
5162 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5163 * DS flags set.
5164 */
5165static int nfs4_check_cl_exchange_flags(u32 flags)
5166{
5167 if (flags & ~EXCHGID4_FLAG_MASK_R)
5168 goto out_inval;
5169 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5170 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5171 goto out_inval;
5172 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5173 goto out_inval;
5174 return NFS_OK;
5175out_inval:
5176 return -NFS4ERR_INVAL;
5177}
5178
5179static bool
5180nfs41_same_server_scope(struct nfs41_server_scope *a,
5181 struct nfs41_server_scope *b)
5182{
5183 if (a->server_scope_sz == b->server_scope_sz &&
5184 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5185 return true;
5186
5187 return false;
5188}
5189
5190/*
5191 * nfs4_proc_bind_conn_to_session()
5192 *
5193 * The 4.1 client currently uses the same TCP connection for the
5194 * fore and backchannel.
5195 */
5196int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5197{
5198 int status;
5199 struct nfs41_bind_conn_to_session_res res;
5200 struct rpc_message msg = {
5201 .rpc_proc =
5202 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5203 .rpc_argp = clp,
5204 .rpc_resp = &res,
5205 .rpc_cred = cred,
5206 };
5207
5208 dprintk("--> %s\n", __func__);
5209 BUG_ON(clp == NULL);
5210
5211 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5212 if (unlikely(res.session == NULL)) {
5213 status = -ENOMEM;
5214 goto out;
5215 }
5216
5217 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5218 if (status == 0) {
5219 if (memcmp(res.session->sess_id.data,
5220 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5221 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5222 status = -EIO;
5223 goto out_session;
5224 }
5225 if (res.dir != NFS4_CDFS4_BOTH) {
5226 dprintk("NFS: %s: Unexpected direction from server\n",
5227 __func__);
5228 status = -EIO;
5229 goto out_session;
5230 }
5231 if (res.use_conn_in_rdma_mode) {
5232 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5233 __func__);
5234 status = -EIO;
5235 goto out_session;
5236 }
5237 }
5238out_session:
5239 kfree(res.session);
5240out:
5241 dprintk("<-- %s status= %d\n", __func__, status);
5242 return status;
5243}
5244
5245/*
5246 * nfs4_proc_exchange_id()
5247 *
5248 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5249 *
5250 * Since the clientid has expired, all compounds using sessions
5251 * associated with the stale clientid will be returning
5252 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5253 * be in some phase of session reset.
5254 */
5255int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5256{
5257 nfs4_verifier verifier;
5258 struct nfs41_exchange_id_args args = {
5259 .verifier = &verifier,
5260 .client = clp,
5261 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5262 };
5263 struct nfs41_exchange_id_res res = {
5264 0
5265 };
5266 int status;
5267 struct rpc_message msg = {
5268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5269 .rpc_argp = &args,
5270 .rpc_resp = &res,
5271 .rpc_cred = cred,
5272 };
5273
5274 nfs4_init_boot_verifier(clp, &verifier);
5275 args.id_len = scnprintf(args.id, sizeof(args.id),
5276 "%s/%s",
5277 clp->cl_ipaddr,
5278 clp->cl_rpcclient->cl_nodename);
5279 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5280 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5281 args.id_len, args.id);
5282
5283 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5284 GFP_NOFS);
5285 if (unlikely(res.server_owner == NULL)) {
5286 status = -ENOMEM;
5287 goto out;
5288 }
5289
5290 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5291 GFP_NOFS);
5292 if (unlikely(res.server_scope == NULL)) {
5293 status = -ENOMEM;
5294 goto out_server_owner;
5295 }
5296
5297 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5298 if (unlikely(res.impl_id == NULL)) {
5299 status = -ENOMEM;
5300 goto out_server_scope;
5301 }
5302
5303 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5304 if (status == 0)
5305 status = nfs4_check_cl_exchange_flags(res.flags);
5306
5307 if (status == 0) {
5308 clp->cl_clientid = res.clientid;
5309 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5310 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5311 clp->cl_seqid = res.seqid;
5312
5313 kfree(clp->cl_serverowner);
5314 clp->cl_serverowner = res.server_owner;
5315 res.server_owner = NULL;
5316
5317 /* use the most recent implementation id */
5318 kfree(clp->cl_implid);
5319 clp->cl_implid = res.impl_id;
5320
5321 if (clp->cl_serverscope != NULL &&
5322 !nfs41_same_server_scope(clp->cl_serverscope,
5323 res.server_scope)) {
5324 dprintk("%s: server_scope mismatch detected\n",
5325 __func__);
5326 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5327 kfree(clp->cl_serverscope);
5328 clp->cl_serverscope = NULL;
5329 }
5330
5331 if (clp->cl_serverscope == NULL) {
5332 clp->cl_serverscope = res.server_scope;
5333 goto out;
5334 }
5335 } else
5336 kfree(res.impl_id);
5337
5338out_server_owner:
5339 kfree(res.server_owner);
5340out_server_scope:
5341 kfree(res.server_scope);
5342out:
5343 if (clp->cl_implid != NULL)
5344 dprintk("NFS reply exchange_id: Server Implementation ID: "
5345 "domain: %s, name: %s, date: %llu,%u\n",
5346 clp->cl_implid->domain, clp->cl_implid->name,
5347 clp->cl_implid->date.seconds,
5348 clp->cl_implid->date.nseconds);
5349 dprintk("NFS reply exchange_id: %d\n", status);
5350 return status;
5351}
5352
5353static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5354 struct rpc_cred *cred)
5355{
5356 struct rpc_message msg = {
5357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5358 .rpc_argp = clp,
5359 .rpc_cred = cred,
5360 };
5361 int status;
5362
5363 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5364 if (status)
5365 dprintk("NFS: Got error %d from the server %s on "
5366 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5367 return status;
5368}
5369
5370static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5371 struct rpc_cred *cred)
5372{
5373 unsigned int loop;
5374 int ret;
5375
5376 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5377 ret = _nfs4_proc_destroy_clientid(clp, cred);
5378 switch (ret) {
5379 case -NFS4ERR_DELAY:
5380 case -NFS4ERR_CLIENTID_BUSY:
5381 ssleep(1);
5382 break;
5383 default:
5384 return ret;
5385 }
5386 }
5387 return 0;
5388}
5389
5390int nfs4_destroy_clientid(struct nfs_client *clp)
5391{
5392 struct rpc_cred *cred;
5393 int ret = 0;
5394
5395 if (clp->cl_mvops->minor_version < 1)
5396 goto out;
5397 if (clp->cl_exchange_flags == 0)
5398 goto out;
5399 cred = nfs4_get_exchange_id_cred(clp);
5400 ret = nfs4_proc_destroy_clientid(clp, cred);
5401 if (cred)
5402 put_rpccred(cred);
5403 switch (ret) {
5404 case 0:
5405 case -NFS4ERR_STALE_CLIENTID:
5406 clp->cl_exchange_flags = 0;
5407 }
5408out:
5409 return ret;
5410}
5411
5412struct nfs4_get_lease_time_data {
5413 struct nfs4_get_lease_time_args *args;
5414 struct nfs4_get_lease_time_res *res;
5415 struct nfs_client *clp;
5416};
5417
5418static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5419 void *calldata)
5420{
5421 int ret;
5422 struct nfs4_get_lease_time_data *data =
5423 (struct nfs4_get_lease_time_data *)calldata;
5424
5425 dprintk("--> %s\n", __func__);
5426 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5427 /* just setup sequence, do not trigger session recovery
5428 since we're invoked within one */
5429 ret = nfs41_setup_sequence(data->clp->cl_session,
5430 &data->args->la_seq_args,
5431 &data->res->lr_seq_res, task);
5432
5433 BUG_ON(ret == -EAGAIN);
5434 rpc_call_start(task);
5435 dprintk("<-- %s\n", __func__);
5436}
5437
5438/*
5439 * Called from nfs4_state_manager thread for session setup, so don't recover
5440 * from sequence operation or clientid errors.
5441 */
5442static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5443{
5444 struct nfs4_get_lease_time_data *data =
5445 (struct nfs4_get_lease_time_data *)calldata;
5446
5447 dprintk("--> %s\n", __func__);
5448 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5449 return;
5450 switch (task->tk_status) {
5451 case -NFS4ERR_DELAY:
5452 case -NFS4ERR_GRACE:
5453 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5454 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5455 task->tk_status = 0;
5456 /* fall through */
5457 case -NFS4ERR_RETRY_UNCACHED_REP:
5458 rpc_restart_call_prepare(task);
5459 return;
5460 }
5461 dprintk("<-- %s\n", __func__);
5462}
5463
5464static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5465 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5466 .rpc_call_done = nfs4_get_lease_time_done,
5467};
5468
5469int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5470{
5471 struct rpc_task *task;
5472 struct nfs4_get_lease_time_args args;
5473 struct nfs4_get_lease_time_res res = {
5474 .lr_fsinfo = fsinfo,
5475 };
5476 struct nfs4_get_lease_time_data data = {
5477 .args = &args,
5478 .res = &res,
5479 .clp = clp,
5480 };
5481 struct rpc_message msg = {
5482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5483 .rpc_argp = &args,
5484 .rpc_resp = &res,
5485 };
5486 struct rpc_task_setup task_setup = {
5487 .rpc_client = clp->cl_rpcclient,
5488 .rpc_message = &msg,
5489 .callback_ops = &nfs4_get_lease_time_ops,
5490 .callback_data = &data,
5491 .flags = RPC_TASK_TIMEOUT,
5492 };
5493 int status;
5494
5495 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5496 dprintk("--> %s\n", __func__);
5497 task = rpc_run_task(&task_setup);
5498
5499 if (IS_ERR(task))
5500 status = PTR_ERR(task);
5501 else {
5502 status = task->tk_status;
5503 rpc_put_task(task);
5504 }
5505 dprintk("<-- %s return %d\n", __func__, status);
5506
5507 return status;
5508}
5509
5510static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5511{
5512 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5513}
5514
5515static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5516 struct nfs4_slot *new,
5517 u32 max_slots,
5518 u32 ivalue)
5519{
5520 struct nfs4_slot *old = NULL;
5521 u32 i;
5522
5523 spin_lock(&tbl->slot_tbl_lock);
5524 if (new) {
5525 old = tbl->slots;
5526 tbl->slots = new;
5527 tbl->max_slots = max_slots;
5528 }
5529 tbl->highest_used_slotid = -1; /* no slot is currently used */
5530 for (i = 0; i < tbl->max_slots; i++)
5531 tbl->slots[i].seq_nr = ivalue;
5532 spin_unlock(&tbl->slot_tbl_lock);
5533 kfree(old);
5534}
5535
5536/*
5537 * (re)Initialise a slot table
5538 */
5539static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5540 u32 ivalue)
5541{
5542 struct nfs4_slot *new = NULL;
5543 int ret = -ENOMEM;
5544
5545 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5546 max_reqs, tbl->max_slots);
5547
5548 /* Does the newly negotiated max_reqs match the existing slot table? */
5549 if (max_reqs != tbl->max_slots) {
5550 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5551 if (!new)
5552 goto out;
5553 }
5554 ret = 0;
5555
5556 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5557 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5558 tbl, tbl->slots, tbl->max_slots);
5559out:
5560 dprintk("<-- %s: return %d\n", __func__, ret);
5561 return ret;
5562}
5563
5564/* Destroy the slot table */
5565static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5566{
5567 if (session->fc_slot_table.slots != NULL) {
5568 kfree(session->fc_slot_table.slots);
5569 session->fc_slot_table.slots = NULL;
5570 }
5571 if (session->bc_slot_table.slots != NULL) {
5572 kfree(session->bc_slot_table.slots);
5573 session->bc_slot_table.slots = NULL;
5574 }
5575 return;
5576}
5577
5578/*
5579 * Initialize or reset the forechannel and backchannel tables
5580 */
5581static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5582{
5583 struct nfs4_slot_table *tbl;
5584 int status;
5585
5586 dprintk("--> %s\n", __func__);
5587 /* Fore channel */
5588 tbl = &ses->fc_slot_table;
5589 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5590 if (status) /* -ENOMEM */
5591 return status;
5592 /* Back channel */
5593 tbl = &ses->bc_slot_table;
5594 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5595 if (status && tbl->slots == NULL)
5596 /* Fore and back channel share a connection so get
5597 * both slot tables or neither */
5598 nfs4_destroy_slot_tables(ses);
5599 return status;
5600}
5601
5602struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5603{
5604 struct nfs4_session *session;
5605 struct nfs4_slot_table *tbl;
5606
5607 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5608 if (!session)
5609 return NULL;
5610
5611 tbl = &session->fc_slot_table;
5612 tbl->highest_used_slotid = NFS4_NO_SLOT;
5613 spin_lock_init(&tbl->slot_tbl_lock);
5614 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5615 init_completion(&tbl->complete);
5616
5617 tbl = &session->bc_slot_table;
5618 tbl->highest_used_slotid = NFS4_NO_SLOT;
5619 spin_lock_init(&tbl->slot_tbl_lock);
5620 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5621 init_completion(&tbl->complete);
5622
5623 session->session_state = 1<<NFS4_SESSION_INITING;
5624
5625 session->clp = clp;
5626 return session;
5627}
5628
5629void nfs4_destroy_session(struct nfs4_session *session)
5630{
5631 struct rpc_xprt *xprt;
5632 struct rpc_cred *cred;
5633
5634 cred = nfs4_get_exchange_id_cred(session->clp);
5635 nfs4_proc_destroy_session(session, cred);
5636 if (cred)
5637 put_rpccred(cred);
5638
5639 rcu_read_lock();
5640 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5641 rcu_read_unlock();
5642 dprintk("%s Destroy backchannel for xprt %p\n",
5643 __func__, xprt);
5644 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5645 nfs4_destroy_slot_tables(session);
5646 kfree(session);
5647}
5648
5649/*
5650 * Initialize the values to be used by the client in CREATE_SESSION
5651 * If nfs4_init_session set the fore channel request and response sizes,
5652 * use them.
5653 *
5654 * Set the back channel max_resp_sz_cached to zero to force the client to
5655 * always set csa_cachethis to FALSE because the current implementation
5656 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5657 */
5658static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5659{
5660 struct nfs4_session *session = args->client->cl_session;
5661 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5662 mxresp_sz = session->fc_attrs.max_resp_sz;
5663
5664 if (mxrqst_sz == 0)
5665 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5666 if (mxresp_sz == 0)
5667 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5668 /* Fore channel attributes */
5669 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5670 args->fc_attrs.max_resp_sz = mxresp_sz;
5671 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5672 args->fc_attrs.max_reqs = max_session_slots;
5673
5674 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5675 "max_ops=%u max_reqs=%u\n",
5676 __func__,
5677 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5678 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5679
5680 /* Back channel attributes */
5681 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5682 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5683 args->bc_attrs.max_resp_sz_cached = 0;
5684 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5685 args->bc_attrs.max_reqs = 1;
5686
5687 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5688 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5689 __func__,
5690 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5691 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5692 args->bc_attrs.max_reqs);
5693}
5694
5695static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5696{
5697 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5698 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5699
5700 if (rcvd->max_resp_sz > sent->max_resp_sz)
5701 return -EINVAL;
5702 /*
5703 * Our requested max_ops is the minimum we need; we're not
5704 * prepared to break up compounds into smaller pieces than that.
5705 * So, no point even trying to continue if the server won't
5706 * cooperate:
5707 */
5708 if (rcvd->max_ops < sent->max_ops)
5709 return -EINVAL;
5710 if (rcvd->max_reqs == 0)
5711 return -EINVAL;
5712 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5713 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5714 return 0;
5715}
5716
5717static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5718{
5719 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5720 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5721
5722 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5723 return -EINVAL;
5724 if (rcvd->max_resp_sz < sent->max_resp_sz)
5725 return -EINVAL;
5726 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5727 return -EINVAL;
5728 /* These would render the backchannel useless: */
5729 if (rcvd->max_ops != sent->max_ops)
5730 return -EINVAL;
5731 if (rcvd->max_reqs != sent->max_reqs)
5732 return -EINVAL;
5733 return 0;
5734}
5735
5736static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5737 struct nfs4_session *session)
5738{
5739 int ret;
5740
5741 ret = nfs4_verify_fore_channel_attrs(args, session);
5742 if (ret)
5743 return ret;
5744 return nfs4_verify_back_channel_attrs(args, session);
5745}
5746
5747static int _nfs4_proc_create_session(struct nfs_client *clp,
5748 struct rpc_cred *cred)
5749{
5750 struct nfs4_session *session = clp->cl_session;
5751 struct nfs41_create_session_args args = {
5752 .client = clp,
5753 .cb_program = NFS4_CALLBACK,
5754 };
5755 struct nfs41_create_session_res res = {
5756 .client = clp,
5757 };
5758 struct rpc_message msg = {
5759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5760 .rpc_argp = &args,
5761 .rpc_resp = &res,
5762 .rpc_cred = cred,
5763 };
5764 int status;
5765
5766 nfs4_init_channel_attrs(&args);
5767 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5768
5769 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5770
5771 if (!status)
5772 /* Verify the session's negotiated channel_attrs values */
5773 status = nfs4_verify_channel_attrs(&args, session);
5774 if (!status) {
5775 /* Increment the clientid slot sequence id */
5776 clp->cl_seqid++;
5777 }
5778
5779 return status;
5780}
5781
5782/*
5783 * Issues a CREATE_SESSION operation to the server.
5784 * It is the responsibility of the caller to verify the session is
5785 * expired before calling this routine.
5786 */
5787int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5788{
5789 int status;
5790 unsigned *ptr;
5791 struct nfs4_session *session = clp->cl_session;
5792
5793 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5794
5795 status = _nfs4_proc_create_session(clp, cred);
5796 if (status)
5797 goto out;
5798
5799 /* Init or reset the session slot tables */
5800 status = nfs4_setup_session_slot_tables(session);
5801 dprintk("slot table setup returned %d\n", status);
5802 if (status)
5803 goto out;
5804
5805 ptr = (unsigned *)&session->sess_id.data[0];
5806 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5807 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5808out:
5809 dprintk("<-- %s\n", __func__);
5810 return status;
5811}
5812
5813/*
5814 * Issue the over-the-wire RPC DESTROY_SESSION.
5815 * The caller must serialize access to this routine.
5816 */
5817int nfs4_proc_destroy_session(struct nfs4_session *session,
5818 struct rpc_cred *cred)
5819{
5820 struct rpc_message msg = {
5821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5822 .rpc_argp = session,
5823 .rpc_cred = cred,
5824 };
5825 int status = 0;
5826
5827 dprintk("--> nfs4_proc_destroy_session\n");
5828
5829 /* session is still being setup */
5830 if (session->clp->cl_cons_state != NFS_CS_READY)
5831 return status;
5832
5833 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5834
5835 if (status)
5836 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5837 "Session has been destroyed regardless...\n", status);
5838
5839 dprintk("<-- nfs4_proc_destroy_session\n");
5840 return status;
5841}
5842
5843/*
5844 * With sessions, the client is not marked ready until after a
5845 * successful EXCHANGE_ID and CREATE_SESSION.
5846 *
5847 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5848 * other versions of NFS can be tried.
5849 */
5850static int nfs41_check_session_ready(struct nfs_client *clp)
5851{
5852 int ret;
5853
5854 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5855 ret = nfs4_client_recover_expired_lease(clp);
5856 if (ret)
5857 return ret;
5858 }
5859 if (clp->cl_cons_state < NFS_CS_READY)
5860 return -EPROTONOSUPPORT;
5861 smp_rmb();
5862 return 0;
5863}
5864
5865int nfs4_init_session(struct nfs_server *server)
5866{
5867 struct nfs_client *clp = server->nfs_client;
5868 struct nfs4_session *session;
5869 unsigned int rsize, wsize;
5870
5871 if (!nfs4_has_session(clp))
5872 return 0;
5873
5874 session = clp->cl_session;
5875 spin_lock(&clp->cl_lock);
5876 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5877
5878 rsize = server->rsize;
5879 if (rsize == 0)
5880 rsize = NFS_MAX_FILE_IO_SIZE;
5881 wsize = server->wsize;
5882 if (wsize == 0)
5883 wsize = NFS_MAX_FILE_IO_SIZE;
5884
5885 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5886 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5887 }
5888 spin_unlock(&clp->cl_lock);
5889
5890 return nfs41_check_session_ready(clp);
5891}
5892
5893int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
5894{
5895 struct nfs4_session *session = clp->cl_session;
5896 int ret;
5897
5898 spin_lock(&clp->cl_lock);
5899 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5900 /*
5901 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5902 * DS lease to be equal to the MDS lease.
5903 */
5904 clp->cl_lease_time = lease_time;
5905 clp->cl_last_renewal = jiffies;
5906 }
5907 spin_unlock(&clp->cl_lock);
5908
5909 ret = nfs41_check_session_ready(clp);
5910 if (ret)
5911 return ret;
5912 /* Test for the DS role */
5913 if (!is_ds_client(clp))
5914 return -ENODEV;
5915 return 0;
5916}
5917EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5918
5919
5920/*
5921 * Renew the cl_session lease.
5922 */
5923struct nfs4_sequence_data {
5924 struct nfs_client *clp;
5925 struct nfs4_sequence_args args;
5926 struct nfs4_sequence_res res;
5927};
5928
5929static void nfs41_sequence_release(void *data)
5930{
5931 struct nfs4_sequence_data *calldata = data;
5932 struct nfs_client *clp = calldata->clp;
5933
5934 if (atomic_read(&clp->cl_count) > 1)
5935 nfs4_schedule_state_renewal(clp);
5936 nfs_put_client(clp);
5937 kfree(calldata);
5938}
5939
5940static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5941{
5942 switch(task->tk_status) {
5943 case -NFS4ERR_DELAY:
5944 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5945 return -EAGAIN;
5946 default:
5947 nfs4_schedule_lease_recovery(clp);
5948 }
5949 return 0;
5950}
5951
5952static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5953{
5954 struct nfs4_sequence_data *calldata = data;
5955 struct nfs_client *clp = calldata->clp;
5956
5957 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5958 return;
5959
5960 if (task->tk_status < 0) {
5961 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5962 if (atomic_read(&clp->cl_count) == 1)
5963 goto out;
5964
5965 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5966 rpc_restart_call_prepare(task);
5967 return;
5968 }
5969 }
5970 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5971out:
5972 dprintk("<-- %s\n", __func__);
5973}
5974
5975static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5976{
5977 struct nfs4_sequence_data *calldata = data;
5978 struct nfs_client *clp = calldata->clp;
5979 struct nfs4_sequence_args *args;
5980 struct nfs4_sequence_res *res;
5981
5982 args = task->tk_msg.rpc_argp;
5983 res = task->tk_msg.rpc_resp;
5984
5985 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5986 return;
5987 rpc_call_start(task);
5988}
5989
5990static const struct rpc_call_ops nfs41_sequence_ops = {
5991 .rpc_call_done = nfs41_sequence_call_done,
5992 .rpc_call_prepare = nfs41_sequence_prepare,
5993 .rpc_release = nfs41_sequence_release,
5994};
5995
5996static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5997{
5998 struct nfs4_sequence_data *calldata;
5999 struct rpc_message msg = {
6000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6001 .rpc_cred = cred,
6002 };
6003 struct rpc_task_setup task_setup_data = {
6004 .rpc_client = clp->cl_rpcclient,
6005 .rpc_message = &msg,
6006 .callback_ops = &nfs41_sequence_ops,
6007 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6008 };
6009
6010 if (!atomic_inc_not_zero(&clp->cl_count))
6011 return ERR_PTR(-EIO);
6012 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6013 if (calldata == NULL) {
6014 nfs_put_client(clp);
6015 return ERR_PTR(-ENOMEM);
6016 }
6017 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6018 msg.rpc_argp = &calldata->args;
6019 msg.rpc_resp = &calldata->res;
6020 calldata->clp = clp;
6021 task_setup_data.callback_data = calldata;
6022
6023 return rpc_run_task(&task_setup_data);
6024}
6025
6026static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6027{
6028 struct rpc_task *task;
6029 int ret = 0;
6030
6031 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6032 return 0;
6033 task = _nfs41_proc_sequence(clp, cred);
6034 if (IS_ERR(task))
6035 ret = PTR_ERR(task);
6036 else
6037 rpc_put_task_async(task);
6038 dprintk("<-- %s status=%d\n", __func__, ret);
6039 return ret;
6040}
6041
6042static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6043{
6044 struct rpc_task *task;
6045 int ret;
6046
6047 task = _nfs41_proc_sequence(clp, cred);
6048 if (IS_ERR(task)) {
6049 ret = PTR_ERR(task);
6050 goto out;
6051 }
6052 ret = rpc_wait_for_completion_task(task);
6053 if (!ret) {
6054 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6055
6056 if (task->tk_status == 0)
6057 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6058 ret = task->tk_status;
6059 }
6060 rpc_put_task(task);
6061out:
6062 dprintk("<-- %s status=%d\n", __func__, ret);
6063 return ret;
6064}
6065
6066struct nfs4_reclaim_complete_data {
6067 struct nfs_client *clp;
6068 struct nfs41_reclaim_complete_args arg;
6069 struct nfs41_reclaim_complete_res res;
6070};
6071
6072static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6073{
6074 struct nfs4_reclaim_complete_data *calldata = data;
6075
6076 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6077 if (nfs41_setup_sequence(calldata->clp->cl_session,
6078 &calldata->arg.seq_args,
6079 &calldata->res.seq_res, task))
6080 return;
6081
6082 rpc_call_start(task);
6083}
6084
6085static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6086{
6087 switch(task->tk_status) {
6088 case 0:
6089 case -NFS4ERR_COMPLETE_ALREADY:
6090 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6091 break;
6092 case -NFS4ERR_DELAY:
6093 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6094 /* fall through */
6095 case -NFS4ERR_RETRY_UNCACHED_REP:
6096 return -EAGAIN;
6097 default:
6098 nfs4_schedule_lease_recovery(clp);
6099 }
6100 return 0;
6101}
6102
6103static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6104{
6105 struct nfs4_reclaim_complete_data *calldata = data;
6106 struct nfs_client *clp = calldata->clp;
6107 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6108
6109 dprintk("--> %s\n", __func__);
6110 if (!nfs41_sequence_done(task, res))
6111 return;
6112
6113 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6114 rpc_restart_call_prepare(task);
6115 return;
6116 }
6117 dprintk("<-- %s\n", __func__);
6118}
6119
6120static void nfs4_free_reclaim_complete_data(void *data)
6121{
6122 struct nfs4_reclaim_complete_data *calldata = data;
6123
6124 kfree(calldata);
6125}
6126
6127static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6128 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6129 .rpc_call_done = nfs4_reclaim_complete_done,
6130 .rpc_release = nfs4_free_reclaim_complete_data,
6131};
6132
6133/*
6134 * Issue a global reclaim complete.
6135 */
6136static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6137{
6138 struct nfs4_reclaim_complete_data *calldata;
6139 struct rpc_task *task;
6140 struct rpc_message msg = {
6141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6142 };
6143 struct rpc_task_setup task_setup_data = {
6144 .rpc_client = clp->cl_rpcclient,
6145 .rpc_message = &msg,
6146 .callback_ops = &nfs4_reclaim_complete_call_ops,
6147 .flags = RPC_TASK_ASYNC,
6148 };
6149 int status = -ENOMEM;
6150
6151 dprintk("--> %s\n", __func__);
6152 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6153 if (calldata == NULL)
6154 goto out;
6155 calldata->clp = clp;
6156 calldata->arg.one_fs = 0;
6157
6158 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6159 msg.rpc_argp = &calldata->arg;
6160 msg.rpc_resp = &calldata->res;
6161 task_setup_data.callback_data = calldata;
6162 task = rpc_run_task(&task_setup_data);
6163 if (IS_ERR(task)) {
6164 status = PTR_ERR(task);
6165 goto out;
6166 }
6167 status = nfs4_wait_for_completion_rpc_task(task);
6168 if (status == 0)
6169 status = task->tk_status;
6170 rpc_put_task(task);
6171 return 0;
6172out:
6173 dprintk("<-- %s status=%d\n", __func__, status);
6174 return status;
6175}
6176
6177static void
6178nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6179{
6180 struct nfs4_layoutget *lgp = calldata;
6181 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6182
6183 dprintk("--> %s\n", __func__);
6184 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6185 * right now covering the LAYOUTGET we are about to send.
6186 * However, that is not so catastrophic, and there seems
6187 * to be no way to prevent it completely.
6188 */
6189 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6190 &lgp->res.seq_res, task))
6191 return;
6192 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6193 NFS_I(lgp->args.inode)->layout,
6194 lgp->args.ctx->state)) {
6195 rpc_exit(task, NFS4_OK);
6196 return;
6197 }
6198 rpc_call_start(task);
6199}
6200
6201static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6202{
6203 struct nfs4_layoutget *lgp = calldata;
6204 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6205
6206 dprintk("--> %s\n", __func__);
6207
6208 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6209 return;
6210
6211 switch (task->tk_status) {
6212 case 0:
6213 break;
6214 case -NFS4ERR_LAYOUTTRYLATER:
6215 case -NFS4ERR_RECALLCONFLICT:
6216 task->tk_status = -NFS4ERR_DELAY;
6217 /* Fall through */
6218 default:
6219 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6220 rpc_restart_call_prepare(task);
6221 return;
6222 }
6223 }
6224 dprintk("<-- %s\n", __func__);
6225}
6226
6227static size_t max_response_pages(struct nfs_server *server)
6228{
6229 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6230 return nfs_page_array_len(0, max_resp_sz);
6231}
6232
6233static void nfs4_free_pages(struct page **pages, size_t size)
6234{
6235 int i;
6236
6237 if (!pages)
6238 return;
6239
6240 for (i = 0; i < size; i++) {
6241 if (!pages[i])
6242 break;
6243 __free_page(pages[i]);
6244 }
6245 kfree(pages);
6246}
6247
6248static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6249{
6250 struct page **pages;
6251 int i;
6252
6253 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6254 if (!pages) {
6255 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6256 return NULL;
6257 }
6258
6259 for (i = 0; i < size; i++) {
6260 pages[i] = alloc_page(gfp_flags);
6261 if (!pages[i]) {
6262 dprintk("%s: failed to allocate page\n", __func__);
6263 nfs4_free_pages(pages, size);
6264 return NULL;
6265 }
6266 }
6267
6268 return pages;
6269}
6270
6271static void nfs4_layoutget_release(void *calldata)
6272{
6273 struct nfs4_layoutget *lgp = calldata;
6274 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6275 size_t max_pages = max_response_pages(server);
6276
6277 dprintk("--> %s\n", __func__);
6278 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6279 put_nfs_open_context(lgp->args.ctx);
6280 kfree(calldata);
6281 dprintk("<-- %s\n", __func__);
6282}
6283
6284static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6285 .rpc_call_prepare = nfs4_layoutget_prepare,
6286 .rpc_call_done = nfs4_layoutget_done,
6287 .rpc_release = nfs4_layoutget_release,
6288};
6289
6290void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6291{
6292 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6293 size_t max_pages = max_response_pages(server);
6294 struct rpc_task *task;
6295 struct rpc_message msg = {
6296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6297 .rpc_argp = &lgp->args,
6298 .rpc_resp = &lgp->res,
6299 };
6300 struct rpc_task_setup task_setup_data = {
6301 .rpc_client = server->client,
6302 .rpc_message = &msg,
6303 .callback_ops = &nfs4_layoutget_call_ops,
6304 .callback_data = lgp,
6305 .flags = RPC_TASK_ASYNC,
6306 };
6307 int status = 0;
6308
6309 dprintk("--> %s\n", __func__);
6310
6311 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6312 if (!lgp->args.layout.pages) {
6313 nfs4_layoutget_release(lgp);
6314 return;
6315 }
6316 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6317
6318 lgp->res.layoutp = &lgp->args.layout;
6319 lgp->res.seq_res.sr_slot = NULL;
6320 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6321 task = rpc_run_task(&task_setup_data);
6322 if (IS_ERR(task))
6323 return;
6324 status = nfs4_wait_for_completion_rpc_task(task);
6325 if (status == 0)
6326 status = task->tk_status;
6327 if (status == 0)
6328 status = pnfs_layout_process(lgp);
6329 rpc_put_task(task);
6330 dprintk("<-- %s status=%d\n", __func__, status);
6331 return;
6332}
6333
6334static void
6335nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6336{
6337 struct nfs4_layoutreturn *lrp = calldata;
6338
6339 dprintk("--> %s\n", __func__);
6340 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6341 &lrp->res.seq_res, task))
6342 return;
6343 rpc_call_start(task);
6344}
6345
6346static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6347{
6348 struct nfs4_layoutreturn *lrp = calldata;
6349 struct nfs_server *server;
6350 struct pnfs_layout_hdr *lo = lrp->args.layout;
6351
6352 dprintk("--> %s\n", __func__);
6353
6354 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6355 return;
6356
6357 server = NFS_SERVER(lrp->args.inode);
6358 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6359 rpc_restart_call_prepare(task);
6360 return;
6361 }
6362 spin_lock(&lo->plh_inode->i_lock);
6363 if (task->tk_status == 0 && lrp->res.lrs_present)
6364 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6365 lo->plh_block_lgets--;
6366 spin_unlock(&lo->plh_inode->i_lock);
6367 dprintk("<-- %s\n", __func__);
6368}
6369
6370static void nfs4_layoutreturn_release(void *calldata)
6371{
6372 struct nfs4_layoutreturn *lrp = calldata;
6373
6374 dprintk("--> %s\n", __func__);
6375 put_layout_hdr(lrp->args.layout);
6376 kfree(calldata);
6377 dprintk("<-- %s\n", __func__);
6378}
6379
6380static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6381 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6382 .rpc_call_done = nfs4_layoutreturn_done,
6383 .rpc_release = nfs4_layoutreturn_release,
6384};
6385
6386int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6387{
6388 struct rpc_task *task;
6389 struct rpc_message msg = {
6390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6391 .rpc_argp = &lrp->args,
6392 .rpc_resp = &lrp->res,
6393 };
6394 struct rpc_task_setup task_setup_data = {
6395 .rpc_client = lrp->clp->cl_rpcclient,
6396 .rpc_message = &msg,
6397 .callback_ops = &nfs4_layoutreturn_call_ops,
6398 .callback_data = lrp,
6399 };
6400 int status;
6401
6402 dprintk("--> %s\n", __func__);
6403 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6404 task = rpc_run_task(&task_setup_data);
6405 if (IS_ERR(task))
6406 return PTR_ERR(task);
6407 status = task->tk_status;
6408 dprintk("<-- %s status=%d\n", __func__, status);
6409 rpc_put_task(task);
6410 return status;
6411}
6412
6413/*
6414 * Retrieve the list of Data Server devices from the MDS.
6415 */
6416static int _nfs4_getdevicelist(struct nfs_server *server,
6417 const struct nfs_fh *fh,
6418 struct pnfs_devicelist *devlist)
6419{
6420 struct nfs4_getdevicelist_args args = {
6421 .fh = fh,
6422 .layoutclass = server->pnfs_curr_ld->id,
6423 };
6424 struct nfs4_getdevicelist_res res = {
6425 .devlist = devlist,
6426 };
6427 struct rpc_message msg = {
6428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6429 .rpc_argp = &args,
6430 .rpc_resp = &res,
6431 };
6432 int status;
6433
6434 dprintk("--> %s\n", __func__);
6435 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6436 &res.seq_res, 0);
6437 dprintk("<-- %s status=%d\n", __func__, status);
6438 return status;
6439}
6440
6441int nfs4_proc_getdevicelist(struct nfs_server *server,
6442 const struct nfs_fh *fh,
6443 struct pnfs_devicelist *devlist)
6444{
6445 struct nfs4_exception exception = { };
6446 int err;
6447
6448 do {
6449 err = nfs4_handle_exception(server,
6450 _nfs4_getdevicelist(server, fh, devlist),
6451 &exception);
6452 } while (exception.retry);
6453
6454 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6455 err, devlist->num_devs);
6456
6457 return err;
6458}
6459EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6460
6461static int
6462_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6463{
6464 struct nfs4_getdeviceinfo_args args = {
6465 .pdev = pdev,
6466 };
6467 struct nfs4_getdeviceinfo_res res = {
6468 .pdev = pdev,
6469 };
6470 struct rpc_message msg = {
6471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6472 .rpc_argp = &args,
6473 .rpc_resp = &res,
6474 };
6475 int status;
6476
6477 dprintk("--> %s\n", __func__);
6478 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6479 dprintk("<-- %s status=%d\n", __func__, status);
6480
6481 return status;
6482}
6483
6484int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6485{
6486 struct nfs4_exception exception = { };
6487 int err;
6488
6489 do {
6490 err = nfs4_handle_exception(server,
6491 _nfs4_proc_getdeviceinfo(server, pdev),
6492 &exception);
6493 } while (exception.retry);
6494 return err;
6495}
6496EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6497
6498static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6499{
6500 struct nfs4_layoutcommit_data *data = calldata;
6501 struct nfs_server *server = NFS_SERVER(data->args.inode);
6502
6503 if (nfs4_setup_sequence(server, &data->args.seq_args,
6504 &data->res.seq_res, task))
6505 return;
6506 rpc_call_start(task);
6507}
6508
6509static void
6510nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6511{
6512 struct nfs4_layoutcommit_data *data = calldata;
6513 struct nfs_server *server = NFS_SERVER(data->args.inode);
6514
6515 if (!nfs4_sequence_done(task, &data->res.seq_res))
6516 return;
6517
6518 switch (task->tk_status) { /* Just ignore these failures */
6519 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6520 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6521 case -NFS4ERR_BADLAYOUT: /* no layout */
6522 case -NFS4ERR_GRACE: /* loca_recalim always false */
6523 task->tk_status = 0;
6524 break;
6525 case 0:
6526 nfs_post_op_update_inode_force_wcc(data->args.inode,
6527 data->res.fattr);
6528 break;
6529 default:
6530 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6531 rpc_restart_call_prepare(task);
6532 return;
6533 }
6534 }
6535}
6536
6537static void nfs4_layoutcommit_release(void *calldata)
6538{
6539 struct nfs4_layoutcommit_data *data = calldata;
6540 struct pnfs_layout_segment *lseg, *tmp;
6541 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6542
6543 pnfs_cleanup_layoutcommit(data);
6544 /* Matched by references in pnfs_set_layoutcommit */
6545 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6546 list_del_init(&lseg->pls_lc_list);
6547 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6548 &lseg->pls_flags))
6549 put_lseg(lseg);
6550 }
6551
6552 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6553 smp_mb__after_clear_bit();
6554 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6555
6556 put_rpccred(data->cred);
6557 kfree(data);
6558}
6559
6560static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6561 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6562 .rpc_call_done = nfs4_layoutcommit_done,
6563 .rpc_release = nfs4_layoutcommit_release,
6564};
6565
6566int
6567nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6568{
6569 struct rpc_message msg = {
6570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6571 .rpc_argp = &data->args,
6572 .rpc_resp = &data->res,
6573 .rpc_cred = data->cred,
6574 };
6575 struct rpc_task_setup task_setup_data = {
6576 .task = &data->task,
6577 .rpc_client = NFS_CLIENT(data->args.inode),
6578 .rpc_message = &msg,
6579 .callback_ops = &nfs4_layoutcommit_ops,
6580 .callback_data = data,
6581 .flags = RPC_TASK_ASYNC,
6582 };
6583 struct rpc_task *task;
6584 int status = 0;
6585
6586 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6587 "lbw: %llu inode %lu\n",
6588 data->task.tk_pid, sync,
6589 data->args.lastbytewritten,
6590 data->args.inode->i_ino);
6591
6592 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6593 task = rpc_run_task(&task_setup_data);
6594 if (IS_ERR(task))
6595 return PTR_ERR(task);
6596 if (sync == false)
6597 goto out;
6598 status = nfs4_wait_for_completion_rpc_task(task);
6599 if (status != 0)
6600 goto out;
6601 status = task->tk_status;
6602out:
6603 dprintk("%s: status %d\n", __func__, status);
6604 rpc_put_task(task);
6605 return status;
6606}
6607
6608static int
6609_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6610 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6611{
6612 struct nfs41_secinfo_no_name_args args = {
6613 .style = SECINFO_STYLE_CURRENT_FH,
6614 };
6615 struct nfs4_secinfo_res res = {
6616 .flavors = flavors,
6617 };
6618 struct rpc_message msg = {
6619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6620 .rpc_argp = &args,
6621 .rpc_resp = &res,
6622 };
6623 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6624}
6625
6626static int
6627nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6628 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6629{
6630 struct nfs4_exception exception = { };
6631 int err;
6632 do {
6633 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6634 switch (err) {
6635 case 0:
6636 case -NFS4ERR_WRONGSEC:
6637 case -NFS4ERR_NOTSUPP:
6638 goto out;
6639 default:
6640 err = nfs4_handle_exception(server, err, &exception);
6641 }
6642 } while (exception.retry);
6643out:
6644 return err;
6645}
6646
6647static int
6648nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6649 struct nfs_fsinfo *info)
6650{
6651 int err;
6652 struct page *page;
6653 rpc_authflavor_t flavor;
6654 struct nfs4_secinfo_flavors *flavors;
6655
6656 page = alloc_page(GFP_KERNEL);
6657 if (!page) {
6658 err = -ENOMEM;
6659 goto out;
6660 }
6661
6662 flavors = page_address(page);
6663 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6664
6665 /*
6666 * Fall back on "guess and check" method if
6667 * the server doesn't support SECINFO_NO_NAME
6668 */
6669 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6670 err = nfs4_find_root_sec(server, fhandle, info);
6671 goto out_freepage;
6672 }
6673 if (err)
6674 goto out_freepage;
6675
6676 flavor = nfs_find_best_sec(flavors);
6677 if (err == 0)
6678 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6679
6680out_freepage:
6681 put_page(page);
6682 if (err == -EACCES)
6683 return -EPERM;
6684out:
6685 return err;
6686}
6687
6688static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6689{
6690 int status;
6691 struct nfs41_test_stateid_args args = {
6692 .stateid = stateid,
6693 };
6694 struct nfs41_test_stateid_res res;
6695 struct rpc_message msg = {
6696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6697 .rpc_argp = &args,
6698 .rpc_resp = &res,
6699 };
6700
6701 dprintk("NFS call test_stateid %p\n", stateid);
6702 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6703 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6704 if (status != NFS_OK) {
6705 dprintk("NFS reply test_stateid: failed, %d\n", status);
6706 return status;
6707 }
6708 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6709 return -res.status;
6710}
6711
6712/**
6713 * nfs41_test_stateid - perform a TEST_STATEID operation
6714 *
6715 * @server: server / transport on which to perform the operation
6716 * @stateid: state ID to test
6717 *
6718 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6719 * Otherwise a negative NFS4ERR value is returned if the operation
6720 * failed or the state ID is not currently valid.
6721 */
6722static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6723{
6724 struct nfs4_exception exception = { };
6725 int err;
6726 do {
6727 err = _nfs41_test_stateid(server, stateid);
6728 if (err != -NFS4ERR_DELAY)
6729 break;
6730 nfs4_handle_exception(server, err, &exception);
6731 } while (exception.retry);
6732 return err;
6733}
6734
6735static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6736{
6737 struct nfs41_free_stateid_args args = {
6738 .stateid = stateid,
6739 };
6740 struct nfs41_free_stateid_res res;
6741 struct rpc_message msg = {
6742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6743 .rpc_argp = &args,
6744 .rpc_resp = &res,
6745 };
6746 int status;
6747
6748 dprintk("NFS call free_stateid %p\n", stateid);
6749 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6750 status = nfs4_call_sync_sequence(server->client, server, &msg,
6751 &args.seq_args, &res.seq_res, 1);
6752 dprintk("NFS reply free_stateid: %d\n", status);
6753 return status;
6754}
6755
6756/**
6757 * nfs41_free_stateid - perform a FREE_STATEID operation
6758 *
6759 * @server: server / transport on which to perform the operation
6760 * @stateid: state ID to release
6761 *
6762 * Returns NFS_OK if the server freed "stateid". Otherwise a
6763 * negative NFS4ERR value is returned.
6764 */
6765static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6766{
6767 struct nfs4_exception exception = { };
6768 int err;
6769 do {
6770 err = _nfs4_free_stateid(server, stateid);
6771 if (err != -NFS4ERR_DELAY)
6772 break;
6773 nfs4_handle_exception(server, err, &exception);
6774 } while (exception.retry);
6775 return err;
6776}
6777
6778static bool nfs41_match_stateid(const nfs4_stateid *s1,
6779 const nfs4_stateid *s2)
6780{
6781 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6782 return false;
6783
6784 if (s1->seqid == s2->seqid)
6785 return true;
6786 if (s1->seqid == 0 || s2->seqid == 0)
6787 return true;
6788
6789 return false;
6790}
6791
6792#endif /* CONFIG_NFS_V4_1 */
6793
6794static bool nfs4_match_stateid(const nfs4_stateid *s1,
6795 const nfs4_stateid *s2)
6796{
6797 return nfs4_stateid_match(s1, s2);
6798}
6799
6800
6801static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6802 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6803 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6804 .recover_open = nfs4_open_reclaim,
6805 .recover_lock = nfs4_lock_reclaim,
6806 .establish_clid = nfs4_init_clientid,
6807 .get_clid_cred = nfs4_get_setclientid_cred,
6808};
6809
6810#if defined(CONFIG_NFS_V4_1)
6811static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6812 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6813 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6814 .recover_open = nfs4_open_reclaim,
6815 .recover_lock = nfs4_lock_reclaim,
6816 .establish_clid = nfs41_init_clientid,
6817 .get_clid_cred = nfs4_get_exchange_id_cred,
6818 .reclaim_complete = nfs41_proc_reclaim_complete,
6819};
6820#endif /* CONFIG_NFS_V4_1 */
6821
6822static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6823 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6824 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6825 .recover_open = nfs4_open_expired,
6826 .recover_lock = nfs4_lock_expired,
6827 .establish_clid = nfs4_init_clientid,
6828 .get_clid_cred = nfs4_get_setclientid_cred,
6829};
6830
6831#if defined(CONFIG_NFS_V4_1)
6832static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6833 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6834 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6835 .recover_open = nfs41_open_expired,
6836 .recover_lock = nfs41_lock_expired,
6837 .establish_clid = nfs41_init_clientid,
6838 .get_clid_cred = nfs4_get_exchange_id_cred,
6839};
6840#endif /* CONFIG_NFS_V4_1 */
6841
6842static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6843 .sched_state_renewal = nfs4_proc_async_renew,
6844 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6845 .renew_lease = nfs4_proc_renew,
6846};
6847
6848#if defined(CONFIG_NFS_V4_1)
6849static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6850 .sched_state_renewal = nfs41_proc_async_sequence,
6851 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6852 .renew_lease = nfs4_proc_sequence,
6853};
6854#endif
6855
6856static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6857 .minor_version = 0,
6858 .call_sync = _nfs4_call_sync,
6859 .match_stateid = nfs4_match_stateid,
6860 .find_root_sec = nfs4_find_root_sec,
6861 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6862 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6863 .state_renewal_ops = &nfs40_state_renewal_ops,
6864};
6865
6866#if defined(CONFIG_NFS_V4_1)
6867static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6868 .minor_version = 1,
6869 .call_sync = _nfs4_call_sync_session,
6870 .match_stateid = nfs41_match_stateid,
6871 .find_root_sec = nfs41_find_root_sec,
6872 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6873 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6874 .state_renewal_ops = &nfs41_state_renewal_ops,
6875};
6876#endif
6877
6878const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6879 [0] = &nfs_v4_0_minor_ops,
6880#if defined(CONFIG_NFS_V4_1)
6881 [1] = &nfs_v4_1_minor_ops,
6882#endif
6883};
6884
6885const struct inode_operations nfs4_dir_inode_operations = {
6886 .create = nfs_create,
6887 .lookup = nfs_lookup,
6888 .atomic_open = nfs_atomic_open,
6889 .link = nfs_link,
6890 .unlink = nfs_unlink,
6891 .symlink = nfs_symlink,
6892 .mkdir = nfs_mkdir,
6893 .rmdir = nfs_rmdir,
6894 .mknod = nfs_mknod,
6895 .rename = nfs_rename,
6896 .permission = nfs_permission,
6897 .getattr = nfs_getattr,
6898 .setattr = nfs_setattr,
6899 .getxattr = generic_getxattr,
6900 .setxattr = generic_setxattr,
6901 .listxattr = generic_listxattr,
6902 .removexattr = generic_removexattr,
6903};
6904
6905static const struct inode_operations nfs4_file_inode_operations = {
6906 .permission = nfs_permission,
6907 .getattr = nfs_getattr,
6908 .setattr = nfs_setattr,
6909 .getxattr = generic_getxattr,
6910 .setxattr = generic_setxattr,
6911 .listxattr = generic_listxattr,
6912 .removexattr = generic_removexattr,
6913};
6914
6915const struct nfs_rpc_ops nfs_v4_clientops = {
6916 .version = 4, /* protocol version */
6917 .dentry_ops = &nfs4_dentry_operations,
6918 .dir_inode_ops = &nfs4_dir_inode_operations,
6919 .file_inode_ops = &nfs4_file_inode_operations,
6920 .file_ops = &nfs4_file_operations,
6921 .getroot = nfs4_proc_get_root,
6922 .submount = nfs4_submount,
6923 .try_mount = nfs4_try_mount,
6924 .getattr = nfs4_proc_getattr,
6925 .setattr = nfs4_proc_setattr,
6926 .lookup = nfs4_proc_lookup,
6927 .access = nfs4_proc_access,
6928 .readlink = nfs4_proc_readlink,
6929 .create = nfs4_proc_create,
6930 .remove = nfs4_proc_remove,
6931 .unlink_setup = nfs4_proc_unlink_setup,
6932 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6933 .unlink_done = nfs4_proc_unlink_done,
6934 .rename = nfs4_proc_rename,
6935 .rename_setup = nfs4_proc_rename_setup,
6936 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6937 .rename_done = nfs4_proc_rename_done,
6938 .link = nfs4_proc_link,
6939 .symlink = nfs4_proc_symlink,
6940 .mkdir = nfs4_proc_mkdir,
6941 .rmdir = nfs4_proc_remove,
6942 .readdir = nfs4_proc_readdir,
6943 .mknod = nfs4_proc_mknod,
6944 .statfs = nfs4_proc_statfs,
6945 .fsinfo = nfs4_proc_fsinfo,
6946 .pathconf = nfs4_proc_pathconf,
6947 .set_capabilities = nfs4_server_capabilities,
6948 .decode_dirent = nfs4_decode_dirent,
6949 .read_setup = nfs4_proc_read_setup,
6950 .read_pageio_init = pnfs_pageio_init_read,
6951 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6952 .read_done = nfs4_read_done,
6953 .write_setup = nfs4_proc_write_setup,
6954 .write_pageio_init = pnfs_pageio_init_write,
6955 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6956 .write_done = nfs4_write_done,
6957 .commit_setup = nfs4_proc_commit_setup,
6958 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6959 .commit_done = nfs4_commit_done,
6960 .lock = nfs4_proc_lock,
6961 .clear_acl_cache = nfs4_zap_acl_attr,
6962 .close_context = nfs4_close_context,
6963 .open_context = nfs4_atomic_open,
6964 .have_delegation = nfs4_have_delegation,
6965 .return_delegation = nfs4_inode_return_delegation,
6966 .alloc_client = nfs4_alloc_client,
6967 .init_client = nfs4_init_client,
6968 .free_client = nfs4_free_client,
6969 .create_server = nfs4_create_server,
6970 .clone_server = nfs_clone_server,
6971};
6972
6973static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6974 .prefix = XATTR_NAME_NFSV4_ACL,
6975 .list = nfs4_xattr_list_nfs4_acl,
6976 .get = nfs4_xattr_get_nfs4_acl,
6977 .set = nfs4_xattr_set_nfs4_acl,
6978};
6979
6980const struct xattr_handler *nfs4_xattr_handlers[] = {
6981 &nfs4_xattr_nfs4_acl_handler,
6982 NULL
6983};
6984
6985/*
6986 * Local variables:
6987 * c-basic-offset: 8
6988 * End:
6989 */
Linux 6.x block layer and io_uring tree(s)