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NFS: Remove the unused "lookupfh()" version of nfs4_proc_lookup()
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/slab.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/sunrpc/gss_api.h>
45#include <linux/nfs.h>
46#include <linux/nfs4.h>
47#include <linux/nfs_fs.h>
48#include <linux/nfs_page.h>
49#include <linux/nfs_mount.h>
50#include <linux/namei.h>
51#include <linux/mount.h>
52#include <linux/module.h>
53#include <linux/sunrpc/bc_xprt.h>
54#include <linux/xattr.h>
55#include <linux/utsname.h>
56
57#include "nfs4_fs.h"
58#include "delegation.h"
59#include "internal.h"
60#include "iostat.h"
61#include "callback.h"
62#include "pnfs.h"
63
64#define NFSDBG_FACILITY NFSDBG_PROC
65
66#define NFS4_POLL_RETRY_MIN (HZ/10)
67#define NFS4_POLL_RETRY_MAX (15*HZ)
68
69#define NFS4_MAX_LOOP_ON_RECOVER (10)
70
71struct nfs4_opendata;
72static int _nfs4_proc_open(struct nfs4_opendata *data);
73static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
74static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
75static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
76static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
77static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
78 struct nfs_fattr *fattr, struct iattr *sattr,
79 struct nfs4_state *state);
80#ifdef CONFIG_NFS_V4_1
81static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
82static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
83#endif
84/* Prevent leaks of NFSv4 errors into userland */
85static int nfs4_map_errors(int err)
86{
87 if (err >= -1000)
88 return err;
89 switch (err) {
90 case -NFS4ERR_RESOURCE:
91 return -EREMOTEIO;
92 case -NFS4ERR_WRONGSEC:
93 return -EPERM;
94 case -NFS4ERR_BADOWNER:
95 case -NFS4ERR_BADNAME:
96 return -EINVAL;
97 default:
98 dprintk("%s could not handle NFSv4 error %d\n",
99 __func__, -err);
100 break;
101 }
102 return -EIO;
103}
104
105/*
106 * This is our standard bitmap for GETATTR requests.
107 */
108const u32 nfs4_fattr_bitmap[2] = {
109 FATTR4_WORD0_TYPE
110 | FATTR4_WORD0_CHANGE
111 | FATTR4_WORD0_SIZE
112 | FATTR4_WORD0_FSID
113 | FATTR4_WORD0_FILEID,
114 FATTR4_WORD1_MODE
115 | FATTR4_WORD1_NUMLINKS
116 | FATTR4_WORD1_OWNER
117 | FATTR4_WORD1_OWNER_GROUP
118 | FATTR4_WORD1_RAWDEV
119 | FATTR4_WORD1_SPACE_USED
120 | FATTR4_WORD1_TIME_ACCESS
121 | FATTR4_WORD1_TIME_METADATA
122 | FATTR4_WORD1_TIME_MODIFY
123};
124
125const u32 nfs4_statfs_bitmap[2] = {
126 FATTR4_WORD0_FILES_AVAIL
127 | FATTR4_WORD0_FILES_FREE
128 | FATTR4_WORD0_FILES_TOTAL,
129 FATTR4_WORD1_SPACE_AVAIL
130 | FATTR4_WORD1_SPACE_FREE
131 | FATTR4_WORD1_SPACE_TOTAL
132};
133
134const u32 nfs4_pathconf_bitmap[2] = {
135 FATTR4_WORD0_MAXLINK
136 | FATTR4_WORD0_MAXNAME,
137 0
138};
139
140const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
141 | FATTR4_WORD0_MAXREAD
142 | FATTR4_WORD0_MAXWRITE
143 | FATTR4_WORD0_LEASE_TIME,
144 FATTR4_WORD1_TIME_DELTA
145 | FATTR4_WORD1_FS_LAYOUT_TYPES,
146 FATTR4_WORD2_LAYOUT_BLKSIZE
147};
148
149const u32 nfs4_fs_locations_bitmap[2] = {
150 FATTR4_WORD0_TYPE
151 | FATTR4_WORD0_CHANGE
152 | FATTR4_WORD0_SIZE
153 | FATTR4_WORD0_FSID
154 | FATTR4_WORD0_FILEID
155 | FATTR4_WORD0_FS_LOCATIONS,
156 FATTR4_WORD1_MODE
157 | FATTR4_WORD1_NUMLINKS
158 | FATTR4_WORD1_OWNER
159 | FATTR4_WORD1_OWNER_GROUP
160 | FATTR4_WORD1_RAWDEV
161 | FATTR4_WORD1_SPACE_USED
162 | FATTR4_WORD1_TIME_ACCESS
163 | FATTR4_WORD1_TIME_METADATA
164 | FATTR4_WORD1_TIME_MODIFY
165 | FATTR4_WORD1_MOUNTED_ON_FILEID
166};
167
168static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
169 struct nfs4_readdir_arg *readdir)
170{
171 __be32 *start, *p;
172
173 BUG_ON(readdir->count < 80);
174 if (cookie > 2) {
175 readdir->cookie = cookie;
176 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
177 return;
178 }
179
180 readdir->cookie = 0;
181 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
182 if (cookie == 2)
183 return;
184
185 /*
186 * NFSv4 servers do not return entries for '.' and '..'
187 * Therefore, we fake these entries here. We let '.'
188 * have cookie 0 and '..' have cookie 1. Note that
189 * when talking to the server, we always send cookie 0
190 * instead of 1 or 2.
191 */
192 start = p = kmap_atomic(*readdir->pages, KM_USER0);
193
194 if (cookie == 0) {
195 *p++ = xdr_one; /* next */
196 *p++ = xdr_zero; /* cookie, first word */
197 *p++ = xdr_one; /* cookie, second word */
198 *p++ = xdr_one; /* entry len */
199 memcpy(p, ".\0\0\0", 4); /* entry */
200 p++;
201 *p++ = xdr_one; /* bitmap length */
202 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
203 *p++ = htonl(8); /* attribute buffer length */
204 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
205 }
206
207 *p++ = xdr_one; /* next */
208 *p++ = xdr_zero; /* cookie, first word */
209 *p++ = xdr_two; /* cookie, second word */
210 *p++ = xdr_two; /* entry len */
211 memcpy(p, "..\0\0", 4); /* entry */
212 p++;
213 *p++ = xdr_one; /* bitmap length */
214 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
215 *p++ = htonl(8); /* attribute buffer length */
216 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
217
218 readdir->pgbase = (char *)p - (char *)start;
219 readdir->count -= readdir->pgbase;
220 kunmap_atomic(start, KM_USER0);
221}
222
223static int nfs4_wait_clnt_recover(struct nfs_client *clp)
224{
225 int res;
226
227 might_sleep();
228
229 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
230 nfs_wait_bit_killable, TASK_KILLABLE);
231 return res;
232}
233
234static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
235{
236 int res = 0;
237
238 might_sleep();
239
240 if (*timeout <= 0)
241 *timeout = NFS4_POLL_RETRY_MIN;
242 if (*timeout > NFS4_POLL_RETRY_MAX)
243 *timeout = NFS4_POLL_RETRY_MAX;
244 schedule_timeout_killable(*timeout);
245 if (fatal_signal_pending(current))
246 res = -ERESTARTSYS;
247 *timeout <<= 1;
248 return res;
249}
250
251/* This is the error handling routine for processes that are allowed
252 * to sleep.
253 */
254static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
255{
256 struct nfs_client *clp = server->nfs_client;
257 struct nfs4_state *state = exception->state;
258 int ret = errorcode;
259
260 exception->retry = 0;
261 switch(errorcode) {
262 case 0:
263 return 0;
264 case -NFS4ERR_ADMIN_REVOKED:
265 case -NFS4ERR_BAD_STATEID:
266 case -NFS4ERR_OPENMODE:
267 if (state == NULL)
268 break;
269 nfs4_schedule_stateid_recovery(server, state);
270 goto wait_on_recovery;
271 case -NFS4ERR_EXPIRED:
272 if (state != NULL)
273 nfs4_schedule_stateid_recovery(server, state);
274 case -NFS4ERR_STALE_STATEID:
275 case -NFS4ERR_STALE_CLIENTID:
276 nfs4_schedule_lease_recovery(clp);
277 goto wait_on_recovery;
278#if defined(CONFIG_NFS_V4_1)
279 case -NFS4ERR_BADSESSION:
280 case -NFS4ERR_BADSLOT:
281 case -NFS4ERR_BAD_HIGH_SLOT:
282 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
283 case -NFS4ERR_DEADSESSION:
284 case -NFS4ERR_SEQ_FALSE_RETRY:
285 case -NFS4ERR_SEQ_MISORDERED:
286 dprintk("%s ERROR: %d Reset session\n", __func__,
287 errorcode);
288 nfs4_schedule_session_recovery(clp->cl_session);
289 exception->retry = 1;
290 break;
291#endif /* defined(CONFIG_NFS_V4_1) */
292 case -NFS4ERR_FILE_OPEN:
293 if (exception->timeout > HZ) {
294 /* We have retried a decent amount, time to
295 * fail
296 */
297 ret = -EBUSY;
298 break;
299 }
300 case -NFS4ERR_GRACE:
301 case -NFS4ERR_DELAY:
302 case -EKEYEXPIRED:
303 ret = nfs4_delay(server->client, &exception->timeout);
304 if (ret != 0)
305 break;
306 case -NFS4ERR_RETRY_UNCACHED_REP:
307 case -NFS4ERR_OLD_STATEID:
308 exception->retry = 1;
309 break;
310 case -NFS4ERR_BADOWNER:
311 /* The following works around a Linux server bug! */
312 case -NFS4ERR_BADNAME:
313 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
314 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
315 exception->retry = 1;
316 printk(KERN_WARNING "NFS: v4 server %s "
317 "does not accept raw "
318 "uid/gids. "
319 "Reenabling the idmapper.\n",
320 server->nfs_client->cl_hostname);
321 }
322 }
323 /* We failed to handle the error */
324 return nfs4_map_errors(ret);
325wait_on_recovery:
326 ret = nfs4_wait_clnt_recover(clp);
327 if (ret == 0)
328 exception->retry = 1;
329 return ret;
330}
331
332
333static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
334{
335 spin_lock(&clp->cl_lock);
336 if (time_before(clp->cl_last_renewal,timestamp))
337 clp->cl_last_renewal = timestamp;
338 spin_unlock(&clp->cl_lock);
339}
340
341static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
342{
343 do_renew_lease(server->nfs_client, timestamp);
344}
345
346#if defined(CONFIG_NFS_V4_1)
347
348/*
349 * nfs4_free_slot - free a slot and efficiently update slot table.
350 *
351 * freeing a slot is trivially done by clearing its respective bit
352 * in the bitmap.
353 * If the freed slotid equals highest_used_slotid we want to update it
354 * so that the server would be able to size down the slot table if needed,
355 * otherwise we know that the highest_used_slotid is still in use.
356 * When updating highest_used_slotid there may be "holes" in the bitmap
357 * so we need to scan down from highest_used_slotid to 0 looking for the now
358 * highest slotid in use.
359 * If none found, highest_used_slotid is set to -1.
360 *
361 * Must be called while holding tbl->slot_tbl_lock
362 */
363static void
364nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
365{
366 int free_slotid = free_slot - tbl->slots;
367 int slotid = free_slotid;
368
369 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
370 /* clear used bit in bitmap */
371 __clear_bit(slotid, tbl->used_slots);
372
373 /* update highest_used_slotid when it is freed */
374 if (slotid == tbl->highest_used_slotid) {
375 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
376 if (slotid < tbl->max_slots)
377 tbl->highest_used_slotid = slotid;
378 else
379 tbl->highest_used_slotid = -1;
380 }
381 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
382 free_slotid, tbl->highest_used_slotid);
383}
384
385/*
386 * Signal state manager thread if session fore channel is drained
387 */
388static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
389{
390 struct rpc_task *task;
391
392 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
393 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
394 if (task)
395 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
396 return;
397 }
398
399 if (ses->fc_slot_table.highest_used_slotid != -1)
400 return;
401
402 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
403 complete(&ses->fc_slot_table.complete);
404}
405
406/*
407 * Signal state manager thread if session back channel is drained
408 */
409void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
410{
411 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
412 ses->bc_slot_table.highest_used_slotid != -1)
413 return;
414 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
415 complete(&ses->bc_slot_table.complete);
416}
417
418static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
419{
420 struct nfs4_slot_table *tbl;
421
422 tbl = &res->sr_session->fc_slot_table;
423 if (!res->sr_slot) {
424 /* just wake up the next guy waiting since
425 * we may have not consumed a slot after all */
426 dprintk("%s: No slot\n", __func__);
427 return;
428 }
429
430 spin_lock(&tbl->slot_tbl_lock);
431 nfs4_free_slot(tbl, res->sr_slot);
432 nfs4_check_drain_fc_complete(res->sr_session);
433 spin_unlock(&tbl->slot_tbl_lock);
434 res->sr_slot = NULL;
435}
436
437static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
438{
439 unsigned long timestamp;
440 struct nfs_client *clp;
441
442 /*
443 * sr_status remains 1 if an RPC level error occurred. The server
444 * may or may not have processed the sequence operation..
445 * Proceed as if the server received and processed the sequence
446 * operation.
447 */
448 if (res->sr_status == 1)
449 res->sr_status = NFS_OK;
450
451 /* don't increment the sequence number if the task wasn't sent */
452 if (!RPC_WAS_SENT(task))
453 goto out;
454
455 /* Check the SEQUENCE operation status */
456 switch (res->sr_status) {
457 case 0:
458 /* Update the slot's sequence and clientid lease timer */
459 ++res->sr_slot->seq_nr;
460 timestamp = res->sr_renewal_time;
461 clp = res->sr_session->clp;
462 do_renew_lease(clp, timestamp);
463 /* Check sequence flags */
464 if (res->sr_status_flags != 0)
465 nfs4_schedule_lease_recovery(clp);
466 break;
467 case -NFS4ERR_DELAY:
468 /* The server detected a resend of the RPC call and
469 * returned NFS4ERR_DELAY as per Section 2.10.6.2
470 * of RFC5661.
471 */
472 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
473 __func__,
474 res->sr_slot - res->sr_session->fc_slot_table.slots,
475 res->sr_slot->seq_nr);
476 goto out_retry;
477 default:
478 /* Just update the slot sequence no. */
479 ++res->sr_slot->seq_nr;
480 }
481out:
482 /* The session may be reset by one of the error handlers. */
483 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
484 nfs41_sequence_free_slot(res);
485 return 1;
486out_retry:
487 if (!rpc_restart_call(task))
488 goto out;
489 rpc_delay(task, NFS4_POLL_RETRY_MAX);
490 return 0;
491}
492
493static int nfs4_sequence_done(struct rpc_task *task,
494 struct nfs4_sequence_res *res)
495{
496 if (res->sr_session == NULL)
497 return 1;
498 return nfs41_sequence_done(task, res);
499}
500
501/*
502 * nfs4_find_slot - efficiently look for a free slot
503 *
504 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
505 * If found, we mark the slot as used, update the highest_used_slotid,
506 * and respectively set up the sequence operation args.
507 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
508 *
509 * Note: must be called with under the slot_tbl_lock.
510 */
511static u8
512nfs4_find_slot(struct nfs4_slot_table *tbl)
513{
514 int slotid;
515 u8 ret_id = NFS4_MAX_SLOT_TABLE;
516 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
517
518 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
519 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
520 tbl->max_slots);
521 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
522 if (slotid >= tbl->max_slots)
523 goto out;
524 __set_bit(slotid, tbl->used_slots);
525 if (slotid > tbl->highest_used_slotid)
526 tbl->highest_used_slotid = slotid;
527 ret_id = slotid;
528out:
529 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
530 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
531 return ret_id;
532}
533
534int nfs41_setup_sequence(struct nfs4_session *session,
535 struct nfs4_sequence_args *args,
536 struct nfs4_sequence_res *res,
537 int cache_reply,
538 struct rpc_task *task)
539{
540 struct nfs4_slot *slot;
541 struct nfs4_slot_table *tbl;
542 u8 slotid;
543
544 dprintk("--> %s\n", __func__);
545 /* slot already allocated? */
546 if (res->sr_slot != NULL)
547 return 0;
548
549 tbl = &session->fc_slot_table;
550
551 spin_lock(&tbl->slot_tbl_lock);
552 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
553 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
554 /*
555 * The state manager will wait until the slot table is empty.
556 * Schedule the reset thread
557 */
558 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
559 spin_unlock(&tbl->slot_tbl_lock);
560 dprintk("%s Schedule Session Reset\n", __func__);
561 return -EAGAIN;
562 }
563
564 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
565 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
566 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
567 spin_unlock(&tbl->slot_tbl_lock);
568 dprintk("%s enforce FIFO order\n", __func__);
569 return -EAGAIN;
570 }
571
572 slotid = nfs4_find_slot(tbl);
573 if (slotid == NFS4_MAX_SLOT_TABLE) {
574 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
575 spin_unlock(&tbl->slot_tbl_lock);
576 dprintk("<-- %s: no free slots\n", __func__);
577 return -EAGAIN;
578 }
579 spin_unlock(&tbl->slot_tbl_lock);
580
581 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
582 slot = tbl->slots + slotid;
583 args->sa_session = session;
584 args->sa_slotid = slotid;
585 args->sa_cache_this = cache_reply;
586
587 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
588
589 res->sr_session = session;
590 res->sr_slot = slot;
591 res->sr_renewal_time = jiffies;
592 res->sr_status_flags = 0;
593 /*
594 * sr_status is only set in decode_sequence, and so will remain
595 * set to 1 if an rpc level failure occurs.
596 */
597 res->sr_status = 1;
598 return 0;
599}
600EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
601
602int nfs4_setup_sequence(const struct nfs_server *server,
603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
605 int cache_reply,
606 struct rpc_task *task)
607{
608 struct nfs4_session *session = nfs4_get_session(server);
609 int ret = 0;
610
611 if (session == NULL) {
612 args->sa_session = NULL;
613 res->sr_session = NULL;
614 goto out;
615 }
616
617 dprintk("--> %s clp %p session %p sr_slot %td\n",
618 __func__, session->clp, session, res->sr_slot ?
619 res->sr_slot - session->fc_slot_table.slots : -1);
620
621 ret = nfs41_setup_sequence(session, args, res, cache_reply,
622 task);
623out:
624 dprintk("<-- %s status=%d\n", __func__, ret);
625 return ret;
626}
627
628struct nfs41_call_sync_data {
629 const struct nfs_server *seq_server;
630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
632 int cache_reply;
633};
634
635static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
636{
637 struct nfs41_call_sync_data *data = calldata;
638
639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640
641 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
642 data->seq_res, data->cache_reply, task))
643 return;
644 rpc_call_start(task);
645}
646
647static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
648{
649 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
650 nfs41_call_sync_prepare(task, calldata);
651}
652
653static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
654{
655 struct nfs41_call_sync_data *data = calldata;
656
657 nfs41_sequence_done(task, data->seq_res);
658}
659
660struct rpc_call_ops nfs41_call_sync_ops = {
661 .rpc_call_prepare = nfs41_call_sync_prepare,
662 .rpc_call_done = nfs41_call_sync_done,
663};
664
665struct rpc_call_ops nfs41_call_priv_sync_ops = {
666 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
667 .rpc_call_done = nfs41_call_sync_done,
668};
669
670static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
671 struct nfs_server *server,
672 struct rpc_message *msg,
673 struct nfs4_sequence_args *args,
674 struct nfs4_sequence_res *res,
675 int cache_reply,
676 int privileged)
677{
678 int ret;
679 struct rpc_task *task;
680 struct nfs41_call_sync_data data = {
681 .seq_server = server,
682 .seq_args = args,
683 .seq_res = res,
684 .cache_reply = cache_reply,
685 };
686 struct rpc_task_setup task_setup = {
687 .rpc_client = clnt,
688 .rpc_message = msg,
689 .callback_ops = &nfs41_call_sync_ops,
690 .callback_data = &data
691 };
692
693 res->sr_slot = NULL;
694 if (privileged)
695 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
696 task = rpc_run_task(&task_setup);
697 if (IS_ERR(task))
698 ret = PTR_ERR(task);
699 else {
700 ret = task->tk_status;
701 rpc_put_task(task);
702 }
703 return ret;
704}
705
706int _nfs4_call_sync_session(struct rpc_clnt *clnt,
707 struct nfs_server *server,
708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
710 struct nfs4_sequence_res *res,
711 int cache_reply)
712{
713 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
714}
715
716#else
717static int nfs4_sequence_done(struct rpc_task *task,
718 struct nfs4_sequence_res *res)
719{
720 return 1;
721}
722#endif /* CONFIG_NFS_V4_1 */
723
724int _nfs4_call_sync(struct rpc_clnt *clnt,
725 struct nfs_server *server,
726 struct rpc_message *msg,
727 struct nfs4_sequence_args *args,
728 struct nfs4_sequence_res *res,
729 int cache_reply)
730{
731 args->sa_session = res->sr_session = NULL;
732 return rpc_call_sync(clnt, msg, 0);
733}
734
735static inline
736int nfs4_call_sync(struct rpc_clnt *clnt,
737 struct nfs_server *server,
738 struct rpc_message *msg,
739 struct nfs4_sequence_args *args,
740 struct nfs4_sequence_res *res,
741 int cache_reply)
742{
743 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
744 args, res, cache_reply);
745}
746
747static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
748{
749 struct nfs_inode *nfsi = NFS_I(dir);
750
751 spin_lock(&dir->i_lock);
752 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
753 if (!cinfo->atomic || cinfo->before != dir->i_version)
754 nfs_force_lookup_revalidate(dir);
755 dir->i_version = cinfo->after;
756 spin_unlock(&dir->i_lock);
757}
758
759struct nfs4_opendata {
760 struct kref kref;
761 struct nfs_openargs o_arg;
762 struct nfs_openres o_res;
763 struct nfs_open_confirmargs c_arg;
764 struct nfs_open_confirmres c_res;
765 struct nfs_fattr f_attr;
766 struct nfs_fattr dir_attr;
767 struct dentry *dir;
768 struct dentry *dentry;
769 struct nfs4_state_owner *owner;
770 struct nfs4_state *state;
771 struct iattr attrs;
772 unsigned long timestamp;
773 unsigned int rpc_done : 1;
774 int rpc_status;
775 int cancelled;
776};
777
778
779static void nfs4_init_opendata_res(struct nfs4_opendata *p)
780{
781 p->o_res.f_attr = &p->f_attr;
782 p->o_res.dir_attr = &p->dir_attr;
783 p->o_res.seqid = p->o_arg.seqid;
784 p->c_res.seqid = p->c_arg.seqid;
785 p->o_res.server = p->o_arg.server;
786 nfs_fattr_init(&p->f_attr);
787 nfs_fattr_init(&p->dir_attr);
788}
789
790static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
791 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
792 const struct iattr *attrs,
793 gfp_t gfp_mask)
794{
795 struct dentry *parent = dget_parent(dentry);
796 struct inode *dir = parent->d_inode;
797 struct nfs_server *server = NFS_SERVER(dir);
798 struct nfs4_opendata *p;
799
800 p = kzalloc(sizeof(*p), gfp_mask);
801 if (p == NULL)
802 goto err;
803 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
804 if (p->o_arg.seqid == NULL)
805 goto err_free;
806 nfs_sb_active(dentry->d_sb);
807 p->dentry = dget(dentry);
808 p->dir = parent;
809 p->owner = sp;
810 atomic_inc(&sp->so_count);
811 p->o_arg.fh = NFS_FH(dir);
812 p->o_arg.open_flags = flags;
813 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
814 p->o_arg.clientid = server->nfs_client->cl_clientid;
815 p->o_arg.id = sp->so_owner_id.id;
816 p->o_arg.name = &dentry->d_name;
817 p->o_arg.server = server;
818 p->o_arg.bitmask = server->attr_bitmask;
819 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
820 if (flags & O_CREAT) {
821 u32 *s;
822
823 p->o_arg.u.attrs = &p->attrs;
824 memcpy(&p->attrs, attrs, sizeof(p->attrs));
825 s = (u32 *) p->o_arg.u.verifier.data;
826 s[0] = jiffies;
827 s[1] = current->pid;
828 }
829 p->c_arg.fh = &p->o_res.fh;
830 p->c_arg.stateid = &p->o_res.stateid;
831 p->c_arg.seqid = p->o_arg.seqid;
832 nfs4_init_opendata_res(p);
833 kref_init(&p->kref);
834 return p;
835err_free:
836 kfree(p);
837err:
838 dput(parent);
839 return NULL;
840}
841
842static void nfs4_opendata_free(struct kref *kref)
843{
844 struct nfs4_opendata *p = container_of(kref,
845 struct nfs4_opendata, kref);
846 struct super_block *sb = p->dentry->d_sb;
847
848 nfs_free_seqid(p->o_arg.seqid);
849 if (p->state != NULL)
850 nfs4_put_open_state(p->state);
851 nfs4_put_state_owner(p->owner);
852 dput(p->dir);
853 dput(p->dentry);
854 nfs_sb_deactive(sb);
855 kfree(p);
856}
857
858static void nfs4_opendata_put(struct nfs4_opendata *p)
859{
860 if (p != NULL)
861 kref_put(&p->kref, nfs4_opendata_free);
862}
863
864static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
865{
866 int ret;
867
868 ret = rpc_wait_for_completion_task(task);
869 return ret;
870}
871
872static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
873{
874 int ret = 0;
875
876 if (open_mode & O_EXCL)
877 goto out;
878 switch (mode & (FMODE_READ|FMODE_WRITE)) {
879 case FMODE_READ:
880 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
881 && state->n_rdonly != 0;
882 break;
883 case FMODE_WRITE:
884 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
885 && state->n_wronly != 0;
886 break;
887 case FMODE_READ|FMODE_WRITE:
888 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
889 && state->n_rdwr != 0;
890 }
891out:
892 return ret;
893}
894
895static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
896{
897 if ((delegation->type & fmode) != fmode)
898 return 0;
899 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
900 return 0;
901 nfs_mark_delegation_referenced(delegation);
902 return 1;
903}
904
905static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
906{
907 switch (fmode) {
908 case FMODE_WRITE:
909 state->n_wronly++;
910 break;
911 case FMODE_READ:
912 state->n_rdonly++;
913 break;
914 case FMODE_READ|FMODE_WRITE:
915 state->n_rdwr++;
916 }
917 nfs4_state_set_mode_locked(state, state->state | fmode);
918}
919
920static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
921{
922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
923 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
924 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
925 switch (fmode) {
926 case FMODE_READ:
927 set_bit(NFS_O_RDONLY_STATE, &state->flags);
928 break;
929 case FMODE_WRITE:
930 set_bit(NFS_O_WRONLY_STATE, &state->flags);
931 break;
932 case FMODE_READ|FMODE_WRITE:
933 set_bit(NFS_O_RDWR_STATE, &state->flags);
934 }
935}
936
937static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
938{
939 write_seqlock(&state->seqlock);
940 nfs_set_open_stateid_locked(state, stateid, fmode);
941 write_sequnlock(&state->seqlock);
942}
943
944static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
945{
946 /*
947 * Protect the call to nfs4_state_set_mode_locked and
948 * serialise the stateid update
949 */
950 write_seqlock(&state->seqlock);
951 if (deleg_stateid != NULL) {
952 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
953 set_bit(NFS_DELEGATED_STATE, &state->flags);
954 }
955 if (open_stateid != NULL)
956 nfs_set_open_stateid_locked(state, open_stateid, fmode);
957 write_sequnlock(&state->seqlock);
958 spin_lock(&state->owner->so_lock);
959 update_open_stateflags(state, fmode);
960 spin_unlock(&state->owner->so_lock);
961}
962
963static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
964{
965 struct nfs_inode *nfsi = NFS_I(state->inode);
966 struct nfs_delegation *deleg_cur;
967 int ret = 0;
968
969 fmode &= (FMODE_READ|FMODE_WRITE);
970
971 rcu_read_lock();
972 deleg_cur = rcu_dereference(nfsi->delegation);
973 if (deleg_cur == NULL)
974 goto no_delegation;
975
976 spin_lock(&deleg_cur->lock);
977 if (nfsi->delegation != deleg_cur ||
978 (deleg_cur->type & fmode) != fmode)
979 goto no_delegation_unlock;
980
981 if (delegation == NULL)
982 delegation = &deleg_cur->stateid;
983 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
984 goto no_delegation_unlock;
985
986 nfs_mark_delegation_referenced(deleg_cur);
987 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
988 ret = 1;
989no_delegation_unlock:
990 spin_unlock(&deleg_cur->lock);
991no_delegation:
992 rcu_read_unlock();
993
994 if (!ret && open_stateid != NULL) {
995 __update_open_stateid(state, open_stateid, NULL, fmode);
996 ret = 1;
997 }
998
999 return ret;
1000}
1001
1002
1003static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1004{
1005 struct nfs_delegation *delegation;
1006
1007 rcu_read_lock();
1008 delegation = rcu_dereference(NFS_I(inode)->delegation);
1009 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1010 rcu_read_unlock();
1011 return;
1012 }
1013 rcu_read_unlock();
1014 nfs_inode_return_delegation(inode);
1015}
1016
1017static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1018{
1019 struct nfs4_state *state = opendata->state;
1020 struct nfs_inode *nfsi = NFS_I(state->inode);
1021 struct nfs_delegation *delegation;
1022 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1023 fmode_t fmode = opendata->o_arg.fmode;
1024 nfs4_stateid stateid;
1025 int ret = -EAGAIN;
1026
1027 for (;;) {
1028 if (can_open_cached(state, fmode, open_mode)) {
1029 spin_lock(&state->owner->so_lock);
1030 if (can_open_cached(state, fmode, open_mode)) {
1031 update_open_stateflags(state, fmode);
1032 spin_unlock(&state->owner->so_lock);
1033 goto out_return_state;
1034 }
1035 spin_unlock(&state->owner->so_lock);
1036 }
1037 rcu_read_lock();
1038 delegation = rcu_dereference(nfsi->delegation);
1039 if (delegation == NULL ||
1040 !can_open_delegated(delegation, fmode)) {
1041 rcu_read_unlock();
1042 break;
1043 }
1044 /* Save the delegation */
1045 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1046 rcu_read_unlock();
1047 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1048 if (ret != 0)
1049 goto out;
1050 ret = -EAGAIN;
1051
1052 /* Try to update the stateid using the delegation */
1053 if (update_open_stateid(state, NULL, &stateid, fmode))
1054 goto out_return_state;
1055 }
1056out:
1057 return ERR_PTR(ret);
1058out_return_state:
1059 atomic_inc(&state->count);
1060 return state;
1061}
1062
1063static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1064{
1065 struct inode *inode;
1066 struct nfs4_state *state = NULL;
1067 struct nfs_delegation *delegation;
1068 int ret;
1069
1070 if (!data->rpc_done) {
1071 state = nfs4_try_open_cached(data);
1072 goto out;
1073 }
1074
1075 ret = -EAGAIN;
1076 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1077 goto err;
1078 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1079 ret = PTR_ERR(inode);
1080 if (IS_ERR(inode))
1081 goto err;
1082 ret = -ENOMEM;
1083 state = nfs4_get_open_state(inode, data->owner);
1084 if (state == NULL)
1085 goto err_put_inode;
1086 if (data->o_res.delegation_type != 0) {
1087 int delegation_flags = 0;
1088
1089 rcu_read_lock();
1090 delegation = rcu_dereference(NFS_I(inode)->delegation);
1091 if (delegation)
1092 delegation_flags = delegation->flags;
1093 rcu_read_unlock();
1094 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1095 nfs_inode_set_delegation(state->inode,
1096 data->owner->so_cred,
1097 &data->o_res);
1098 else
1099 nfs_inode_reclaim_delegation(state->inode,
1100 data->owner->so_cred,
1101 &data->o_res);
1102 }
1103
1104 update_open_stateid(state, &data->o_res.stateid, NULL,
1105 data->o_arg.fmode);
1106 iput(inode);
1107out:
1108 return state;
1109err_put_inode:
1110 iput(inode);
1111err:
1112 return ERR_PTR(ret);
1113}
1114
1115static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1116{
1117 struct nfs_inode *nfsi = NFS_I(state->inode);
1118 struct nfs_open_context *ctx;
1119
1120 spin_lock(&state->inode->i_lock);
1121 list_for_each_entry(ctx, &nfsi->open_files, list) {
1122 if (ctx->state != state)
1123 continue;
1124 get_nfs_open_context(ctx);
1125 spin_unlock(&state->inode->i_lock);
1126 return ctx;
1127 }
1128 spin_unlock(&state->inode->i_lock);
1129 return ERR_PTR(-ENOENT);
1130}
1131
1132static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1133{
1134 struct nfs4_opendata *opendata;
1135
1136 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1137 if (opendata == NULL)
1138 return ERR_PTR(-ENOMEM);
1139 opendata->state = state;
1140 atomic_inc(&state->count);
1141 return opendata;
1142}
1143
1144static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1145{
1146 struct nfs4_state *newstate;
1147 int ret;
1148
1149 opendata->o_arg.open_flags = 0;
1150 opendata->o_arg.fmode = fmode;
1151 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1152 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1153 nfs4_init_opendata_res(opendata);
1154 ret = _nfs4_recover_proc_open(opendata);
1155 if (ret != 0)
1156 return ret;
1157 newstate = nfs4_opendata_to_nfs4_state(opendata);
1158 if (IS_ERR(newstate))
1159 return PTR_ERR(newstate);
1160 nfs4_close_state(newstate, fmode);
1161 *res = newstate;
1162 return 0;
1163}
1164
1165static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1166{
1167 struct nfs4_state *newstate;
1168 int ret;
1169
1170 /* memory barrier prior to reading state->n_* */
1171 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1172 smp_rmb();
1173 if (state->n_rdwr != 0) {
1174 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1175 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1176 if (ret != 0)
1177 return ret;
1178 if (newstate != state)
1179 return -ESTALE;
1180 }
1181 if (state->n_wronly != 0) {
1182 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1183 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1184 if (ret != 0)
1185 return ret;
1186 if (newstate != state)
1187 return -ESTALE;
1188 }
1189 if (state->n_rdonly != 0) {
1190 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1191 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1192 if (ret != 0)
1193 return ret;
1194 if (newstate != state)
1195 return -ESTALE;
1196 }
1197 /*
1198 * We may have performed cached opens for all three recoveries.
1199 * Check if we need to update the current stateid.
1200 */
1201 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1202 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1203 write_seqlock(&state->seqlock);
1204 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1205 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1206 write_sequnlock(&state->seqlock);
1207 }
1208 return 0;
1209}
1210
1211/*
1212 * OPEN_RECLAIM:
1213 * reclaim state on the server after a reboot.
1214 */
1215static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1216{
1217 struct nfs_delegation *delegation;
1218 struct nfs4_opendata *opendata;
1219 fmode_t delegation_type = 0;
1220 int status;
1221
1222 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1223 if (IS_ERR(opendata))
1224 return PTR_ERR(opendata);
1225 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1226 opendata->o_arg.fh = NFS_FH(state->inode);
1227 rcu_read_lock();
1228 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1229 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1230 delegation_type = delegation->type;
1231 rcu_read_unlock();
1232 opendata->o_arg.u.delegation_type = delegation_type;
1233 status = nfs4_open_recover(opendata, state);
1234 nfs4_opendata_put(opendata);
1235 return status;
1236}
1237
1238static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1239{
1240 struct nfs_server *server = NFS_SERVER(state->inode);
1241 struct nfs4_exception exception = { };
1242 int err;
1243 do {
1244 err = _nfs4_do_open_reclaim(ctx, state);
1245 if (err != -NFS4ERR_DELAY)
1246 break;
1247 nfs4_handle_exception(server, err, &exception);
1248 } while (exception.retry);
1249 return err;
1250}
1251
1252static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1253{
1254 struct nfs_open_context *ctx;
1255 int ret;
1256
1257 ctx = nfs4_state_find_open_context(state);
1258 if (IS_ERR(ctx))
1259 return PTR_ERR(ctx);
1260 ret = nfs4_do_open_reclaim(ctx, state);
1261 put_nfs_open_context(ctx);
1262 return ret;
1263}
1264
1265static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1266{
1267 struct nfs4_opendata *opendata;
1268 int ret;
1269
1270 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1271 if (IS_ERR(opendata))
1272 return PTR_ERR(opendata);
1273 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1274 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1275 sizeof(opendata->o_arg.u.delegation.data));
1276 ret = nfs4_open_recover(opendata, state);
1277 nfs4_opendata_put(opendata);
1278 return ret;
1279}
1280
1281int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1282{
1283 struct nfs4_exception exception = { };
1284 struct nfs_server *server = NFS_SERVER(state->inode);
1285 int err;
1286 do {
1287 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1288 switch (err) {
1289 case 0:
1290 case -ENOENT:
1291 case -ESTALE:
1292 goto out;
1293 case -NFS4ERR_BADSESSION:
1294 case -NFS4ERR_BADSLOT:
1295 case -NFS4ERR_BAD_HIGH_SLOT:
1296 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1297 case -NFS4ERR_DEADSESSION:
1298 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1299 goto out;
1300 case -NFS4ERR_STALE_CLIENTID:
1301 case -NFS4ERR_STALE_STATEID:
1302 case -NFS4ERR_EXPIRED:
1303 /* Don't recall a delegation if it was lost */
1304 nfs4_schedule_lease_recovery(server->nfs_client);
1305 goto out;
1306 case -ERESTARTSYS:
1307 /*
1308 * The show must go on: exit, but mark the
1309 * stateid as needing recovery.
1310 */
1311 case -NFS4ERR_ADMIN_REVOKED:
1312 case -NFS4ERR_BAD_STATEID:
1313 nfs4_schedule_stateid_recovery(server, state);
1314 case -EKEYEXPIRED:
1315 /*
1316 * User RPCSEC_GSS context has expired.
1317 * We cannot recover this stateid now, so
1318 * skip it and allow recovery thread to
1319 * proceed.
1320 */
1321 case -ENOMEM:
1322 err = 0;
1323 goto out;
1324 }
1325 err = nfs4_handle_exception(server, err, &exception);
1326 } while (exception.retry);
1327out:
1328 return err;
1329}
1330
1331static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1332{
1333 struct nfs4_opendata *data = calldata;
1334
1335 data->rpc_status = task->tk_status;
1336 if (data->rpc_status == 0) {
1337 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1338 sizeof(data->o_res.stateid.data));
1339 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1340 renew_lease(data->o_res.server, data->timestamp);
1341 data->rpc_done = 1;
1342 }
1343}
1344
1345static void nfs4_open_confirm_release(void *calldata)
1346{
1347 struct nfs4_opendata *data = calldata;
1348 struct nfs4_state *state = NULL;
1349
1350 /* If this request hasn't been cancelled, do nothing */
1351 if (data->cancelled == 0)
1352 goto out_free;
1353 /* In case of error, no cleanup! */
1354 if (!data->rpc_done)
1355 goto out_free;
1356 state = nfs4_opendata_to_nfs4_state(data);
1357 if (!IS_ERR(state))
1358 nfs4_close_state(state, data->o_arg.fmode);
1359out_free:
1360 nfs4_opendata_put(data);
1361}
1362
1363static const struct rpc_call_ops nfs4_open_confirm_ops = {
1364 .rpc_call_done = nfs4_open_confirm_done,
1365 .rpc_release = nfs4_open_confirm_release,
1366};
1367
1368/*
1369 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1370 */
1371static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1372{
1373 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1374 struct rpc_task *task;
1375 struct rpc_message msg = {
1376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1377 .rpc_argp = &data->c_arg,
1378 .rpc_resp = &data->c_res,
1379 .rpc_cred = data->owner->so_cred,
1380 };
1381 struct rpc_task_setup task_setup_data = {
1382 .rpc_client = server->client,
1383 .rpc_message = &msg,
1384 .callback_ops = &nfs4_open_confirm_ops,
1385 .callback_data = data,
1386 .workqueue = nfsiod_workqueue,
1387 .flags = RPC_TASK_ASYNC,
1388 };
1389 int status;
1390
1391 kref_get(&data->kref);
1392 data->rpc_done = 0;
1393 data->rpc_status = 0;
1394 data->timestamp = jiffies;
1395 task = rpc_run_task(&task_setup_data);
1396 if (IS_ERR(task))
1397 return PTR_ERR(task);
1398 status = nfs4_wait_for_completion_rpc_task(task);
1399 if (status != 0) {
1400 data->cancelled = 1;
1401 smp_wmb();
1402 } else
1403 status = data->rpc_status;
1404 rpc_put_task(task);
1405 return status;
1406}
1407
1408static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1409{
1410 struct nfs4_opendata *data = calldata;
1411 struct nfs4_state_owner *sp = data->owner;
1412
1413 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1414 return;
1415 /*
1416 * Check if we still need to send an OPEN call, or if we can use
1417 * a delegation instead.
1418 */
1419 if (data->state != NULL) {
1420 struct nfs_delegation *delegation;
1421
1422 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1423 goto out_no_action;
1424 rcu_read_lock();
1425 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1426 if (delegation != NULL &&
1427 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1428 rcu_read_unlock();
1429 goto out_no_action;
1430 }
1431 rcu_read_unlock();
1432 }
1433 /* Update sequence id. */
1434 data->o_arg.id = sp->so_owner_id.id;
1435 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1436 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1437 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1438 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1439 }
1440 data->timestamp = jiffies;
1441 if (nfs4_setup_sequence(data->o_arg.server,
1442 &data->o_arg.seq_args,
1443 &data->o_res.seq_res, 1, task))
1444 return;
1445 rpc_call_start(task);
1446 return;
1447out_no_action:
1448 task->tk_action = NULL;
1449
1450}
1451
1452static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1453{
1454 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1455 nfs4_open_prepare(task, calldata);
1456}
1457
1458static void nfs4_open_done(struct rpc_task *task, void *calldata)
1459{
1460 struct nfs4_opendata *data = calldata;
1461
1462 data->rpc_status = task->tk_status;
1463
1464 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1465 return;
1466
1467 if (task->tk_status == 0) {
1468 switch (data->o_res.f_attr->mode & S_IFMT) {
1469 case S_IFREG:
1470 break;
1471 case S_IFLNK:
1472 data->rpc_status = -ELOOP;
1473 break;
1474 case S_IFDIR:
1475 data->rpc_status = -EISDIR;
1476 break;
1477 default:
1478 data->rpc_status = -ENOTDIR;
1479 }
1480 renew_lease(data->o_res.server, data->timestamp);
1481 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1482 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1483 }
1484 data->rpc_done = 1;
1485}
1486
1487static void nfs4_open_release(void *calldata)
1488{
1489 struct nfs4_opendata *data = calldata;
1490 struct nfs4_state *state = NULL;
1491
1492 /* If this request hasn't been cancelled, do nothing */
1493 if (data->cancelled == 0)
1494 goto out_free;
1495 /* In case of error, no cleanup! */
1496 if (data->rpc_status != 0 || !data->rpc_done)
1497 goto out_free;
1498 /* In case we need an open_confirm, no cleanup! */
1499 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1500 goto out_free;
1501 state = nfs4_opendata_to_nfs4_state(data);
1502 if (!IS_ERR(state))
1503 nfs4_close_state(state, data->o_arg.fmode);
1504out_free:
1505 nfs4_opendata_put(data);
1506}
1507
1508static const struct rpc_call_ops nfs4_open_ops = {
1509 .rpc_call_prepare = nfs4_open_prepare,
1510 .rpc_call_done = nfs4_open_done,
1511 .rpc_release = nfs4_open_release,
1512};
1513
1514static const struct rpc_call_ops nfs4_recover_open_ops = {
1515 .rpc_call_prepare = nfs4_recover_open_prepare,
1516 .rpc_call_done = nfs4_open_done,
1517 .rpc_release = nfs4_open_release,
1518};
1519
1520static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1521{
1522 struct inode *dir = data->dir->d_inode;
1523 struct nfs_server *server = NFS_SERVER(dir);
1524 struct nfs_openargs *o_arg = &data->o_arg;
1525 struct nfs_openres *o_res = &data->o_res;
1526 struct rpc_task *task;
1527 struct rpc_message msg = {
1528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1529 .rpc_argp = o_arg,
1530 .rpc_resp = o_res,
1531 .rpc_cred = data->owner->so_cred,
1532 };
1533 struct rpc_task_setup task_setup_data = {
1534 .rpc_client = server->client,
1535 .rpc_message = &msg,
1536 .callback_ops = &nfs4_open_ops,
1537 .callback_data = data,
1538 .workqueue = nfsiod_workqueue,
1539 .flags = RPC_TASK_ASYNC,
1540 };
1541 int status;
1542
1543 kref_get(&data->kref);
1544 data->rpc_done = 0;
1545 data->rpc_status = 0;
1546 data->cancelled = 0;
1547 if (isrecover)
1548 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1549 task = rpc_run_task(&task_setup_data);
1550 if (IS_ERR(task))
1551 return PTR_ERR(task);
1552 status = nfs4_wait_for_completion_rpc_task(task);
1553 if (status != 0) {
1554 data->cancelled = 1;
1555 smp_wmb();
1556 } else
1557 status = data->rpc_status;
1558 rpc_put_task(task);
1559
1560 return status;
1561}
1562
1563static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1564{
1565 struct inode *dir = data->dir->d_inode;
1566 struct nfs_openres *o_res = &data->o_res;
1567 int status;
1568
1569 status = nfs4_run_open_task(data, 1);
1570 if (status != 0 || !data->rpc_done)
1571 return status;
1572
1573 nfs_refresh_inode(dir, o_res->dir_attr);
1574
1575 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1576 status = _nfs4_proc_open_confirm(data);
1577 if (status != 0)
1578 return status;
1579 }
1580
1581 return status;
1582}
1583
1584/*
1585 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1586 */
1587static int _nfs4_proc_open(struct nfs4_opendata *data)
1588{
1589 struct inode *dir = data->dir->d_inode;
1590 struct nfs_server *server = NFS_SERVER(dir);
1591 struct nfs_openargs *o_arg = &data->o_arg;
1592 struct nfs_openres *o_res = &data->o_res;
1593 int status;
1594
1595 status = nfs4_run_open_task(data, 0);
1596 if (status != 0 || !data->rpc_done)
1597 return status;
1598
1599 if (o_arg->open_flags & O_CREAT) {
1600 update_changeattr(dir, &o_res->cinfo);
1601 nfs_post_op_update_inode(dir, o_res->dir_attr);
1602 } else
1603 nfs_refresh_inode(dir, o_res->dir_attr);
1604 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1605 server->caps &= ~NFS_CAP_POSIX_LOCK;
1606 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1607 status = _nfs4_proc_open_confirm(data);
1608 if (status != 0)
1609 return status;
1610 }
1611 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1612 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1613 return 0;
1614}
1615
1616static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1617{
1618 unsigned int loop;
1619 int ret;
1620
1621 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1622 ret = nfs4_wait_clnt_recover(clp);
1623 if (ret != 0)
1624 break;
1625 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1626 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1627 break;
1628 nfs4_schedule_state_manager(clp);
1629 ret = -EIO;
1630 }
1631 return ret;
1632}
1633
1634static int nfs4_recover_expired_lease(struct nfs_server *server)
1635{
1636 return nfs4_client_recover_expired_lease(server->nfs_client);
1637}
1638
1639/*
1640 * OPEN_EXPIRED:
1641 * reclaim state on the server after a network partition.
1642 * Assumes caller holds the appropriate lock
1643 */
1644static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1645{
1646 struct nfs4_opendata *opendata;
1647 int ret;
1648
1649 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1650 if (IS_ERR(opendata))
1651 return PTR_ERR(opendata);
1652 ret = nfs4_open_recover(opendata, state);
1653 if (ret == -ESTALE)
1654 d_drop(ctx->dentry);
1655 nfs4_opendata_put(opendata);
1656 return ret;
1657}
1658
1659static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1660{
1661 struct nfs_server *server = NFS_SERVER(state->inode);
1662 struct nfs4_exception exception = { };
1663 int err;
1664
1665 do {
1666 err = _nfs4_open_expired(ctx, state);
1667 switch (err) {
1668 default:
1669 goto out;
1670 case -NFS4ERR_GRACE:
1671 case -NFS4ERR_DELAY:
1672 nfs4_handle_exception(server, err, &exception);
1673 err = 0;
1674 }
1675 } while (exception.retry);
1676out:
1677 return err;
1678}
1679
1680static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1681{
1682 struct nfs_open_context *ctx;
1683 int ret;
1684
1685 ctx = nfs4_state_find_open_context(state);
1686 if (IS_ERR(ctx))
1687 return PTR_ERR(ctx);
1688 ret = nfs4_do_open_expired(ctx, state);
1689 put_nfs_open_context(ctx);
1690 return ret;
1691}
1692
1693#if defined(CONFIG_NFS_V4_1)
1694static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1695{
1696 int status;
1697 struct nfs_server *server = NFS_SERVER(state->inode);
1698
1699 status = nfs41_test_stateid(server, state);
1700 if (status == NFS_OK)
1701 return 0;
1702 nfs41_free_stateid(server, state);
1703 return nfs4_open_expired(sp, state);
1704}
1705#endif
1706
1707/*
1708 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1709 * fields corresponding to attributes that were used to store the verifier.
1710 * Make sure we clobber those fields in the later setattr call
1711 */
1712static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1713{
1714 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1715 !(sattr->ia_valid & ATTR_ATIME_SET))
1716 sattr->ia_valid |= ATTR_ATIME;
1717
1718 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1719 !(sattr->ia_valid & ATTR_MTIME_SET))
1720 sattr->ia_valid |= ATTR_MTIME;
1721}
1722
1723/*
1724 * Returns a referenced nfs4_state
1725 */
1726static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1727{
1728 struct nfs4_state_owner *sp;
1729 struct nfs4_state *state = NULL;
1730 struct nfs_server *server = NFS_SERVER(dir);
1731 struct nfs4_opendata *opendata;
1732 int status;
1733
1734 /* Protect against reboot recovery conflicts */
1735 status = -ENOMEM;
1736 if (!(sp = nfs4_get_state_owner(server, cred))) {
1737 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1738 goto out_err;
1739 }
1740 status = nfs4_recover_expired_lease(server);
1741 if (status != 0)
1742 goto err_put_state_owner;
1743 if (dentry->d_inode != NULL)
1744 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1745 status = -ENOMEM;
1746 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1747 if (opendata == NULL)
1748 goto err_put_state_owner;
1749
1750 if (dentry->d_inode != NULL)
1751 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1752
1753 status = _nfs4_proc_open(opendata);
1754 if (status != 0)
1755 goto err_opendata_put;
1756
1757 state = nfs4_opendata_to_nfs4_state(opendata);
1758 status = PTR_ERR(state);
1759 if (IS_ERR(state))
1760 goto err_opendata_put;
1761 if (server->caps & NFS_CAP_POSIX_LOCK)
1762 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1763
1764 if (opendata->o_arg.open_flags & O_EXCL) {
1765 nfs4_exclusive_attrset(opendata, sattr);
1766
1767 nfs_fattr_init(opendata->o_res.f_attr);
1768 status = nfs4_do_setattr(state->inode, cred,
1769 opendata->o_res.f_attr, sattr,
1770 state);
1771 if (status == 0)
1772 nfs_setattr_update_inode(state->inode, sattr);
1773 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1774 }
1775 nfs4_opendata_put(opendata);
1776 nfs4_put_state_owner(sp);
1777 *res = state;
1778 return 0;
1779err_opendata_put:
1780 nfs4_opendata_put(opendata);
1781err_put_state_owner:
1782 nfs4_put_state_owner(sp);
1783out_err:
1784 *res = NULL;
1785 return status;
1786}
1787
1788
1789static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1790{
1791 struct nfs4_exception exception = { };
1792 struct nfs4_state *res;
1793 int status;
1794
1795 do {
1796 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1797 if (status == 0)
1798 break;
1799 /* NOTE: BAD_SEQID means the server and client disagree about the
1800 * book-keeping w.r.t. state-changing operations
1801 * (OPEN/CLOSE/LOCK/LOCKU...)
1802 * It is actually a sign of a bug on the client or on the server.
1803 *
1804 * If we receive a BAD_SEQID error in the particular case of
1805 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1806 * have unhashed the old state_owner for us, and that we can
1807 * therefore safely retry using a new one. We should still warn
1808 * the user though...
1809 */
1810 if (status == -NFS4ERR_BAD_SEQID) {
1811 printk(KERN_WARNING "NFS: v4 server %s "
1812 " returned a bad sequence-id error!\n",
1813 NFS_SERVER(dir)->nfs_client->cl_hostname);
1814 exception.retry = 1;
1815 continue;
1816 }
1817 /*
1818 * BAD_STATEID on OPEN means that the server cancelled our
1819 * state before it received the OPEN_CONFIRM.
1820 * Recover by retrying the request as per the discussion
1821 * on Page 181 of RFC3530.
1822 */
1823 if (status == -NFS4ERR_BAD_STATEID) {
1824 exception.retry = 1;
1825 continue;
1826 }
1827 if (status == -EAGAIN) {
1828 /* We must have found a delegation */
1829 exception.retry = 1;
1830 continue;
1831 }
1832 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1833 status, &exception));
1834 } while (exception.retry);
1835 return res;
1836}
1837
1838static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1839 struct nfs_fattr *fattr, struct iattr *sattr,
1840 struct nfs4_state *state)
1841{
1842 struct nfs_server *server = NFS_SERVER(inode);
1843 struct nfs_setattrargs arg = {
1844 .fh = NFS_FH(inode),
1845 .iap = sattr,
1846 .server = server,
1847 .bitmask = server->attr_bitmask,
1848 };
1849 struct nfs_setattrres res = {
1850 .fattr = fattr,
1851 .server = server,
1852 };
1853 struct rpc_message msg = {
1854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1855 .rpc_argp = &arg,
1856 .rpc_resp = &res,
1857 .rpc_cred = cred,
1858 };
1859 unsigned long timestamp = jiffies;
1860 int status;
1861
1862 nfs_fattr_init(fattr);
1863
1864 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1865 /* Use that stateid */
1866 } else if (state != NULL) {
1867 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1868 } else
1869 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1870
1871 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1872 if (status == 0 && state != NULL)
1873 renew_lease(server, timestamp);
1874 return status;
1875}
1876
1877static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1878 struct nfs_fattr *fattr, struct iattr *sattr,
1879 struct nfs4_state *state)
1880{
1881 struct nfs_server *server = NFS_SERVER(inode);
1882 struct nfs4_exception exception = { };
1883 int err;
1884 do {
1885 err = nfs4_handle_exception(server,
1886 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1887 &exception);
1888 } while (exception.retry);
1889 return err;
1890}
1891
1892struct nfs4_closedata {
1893 struct inode *inode;
1894 struct nfs4_state *state;
1895 struct nfs_closeargs arg;
1896 struct nfs_closeres res;
1897 struct nfs_fattr fattr;
1898 unsigned long timestamp;
1899 bool roc;
1900 u32 roc_barrier;
1901};
1902
1903static void nfs4_free_closedata(void *data)
1904{
1905 struct nfs4_closedata *calldata = data;
1906 struct nfs4_state_owner *sp = calldata->state->owner;
1907 struct super_block *sb = calldata->state->inode->i_sb;
1908
1909 if (calldata->roc)
1910 pnfs_roc_release(calldata->state->inode);
1911 nfs4_put_open_state(calldata->state);
1912 nfs_free_seqid(calldata->arg.seqid);
1913 nfs4_put_state_owner(sp);
1914 nfs_sb_deactive(sb);
1915 kfree(calldata);
1916}
1917
1918static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1919 fmode_t fmode)
1920{
1921 spin_lock(&state->owner->so_lock);
1922 if (!(fmode & FMODE_READ))
1923 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1924 if (!(fmode & FMODE_WRITE))
1925 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1926 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1927 spin_unlock(&state->owner->so_lock);
1928}
1929
1930static void nfs4_close_done(struct rpc_task *task, void *data)
1931{
1932 struct nfs4_closedata *calldata = data;
1933 struct nfs4_state *state = calldata->state;
1934 struct nfs_server *server = NFS_SERVER(calldata->inode);
1935
1936 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1937 return;
1938 /* hmm. we are done with the inode, and in the process of freeing
1939 * the state_owner. we keep this around to process errors
1940 */
1941 switch (task->tk_status) {
1942 case 0:
1943 if (calldata->roc)
1944 pnfs_roc_set_barrier(state->inode,
1945 calldata->roc_barrier);
1946 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1947 renew_lease(server, calldata->timestamp);
1948 nfs4_close_clear_stateid_flags(state,
1949 calldata->arg.fmode);
1950 break;
1951 case -NFS4ERR_STALE_STATEID:
1952 case -NFS4ERR_OLD_STATEID:
1953 case -NFS4ERR_BAD_STATEID:
1954 case -NFS4ERR_EXPIRED:
1955 if (calldata->arg.fmode == 0)
1956 break;
1957 default:
1958 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1959 rpc_restart_call_prepare(task);
1960 }
1961 nfs_release_seqid(calldata->arg.seqid);
1962 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1963}
1964
1965static void nfs4_close_prepare(struct rpc_task *task, void *data)
1966{
1967 struct nfs4_closedata *calldata = data;
1968 struct nfs4_state *state = calldata->state;
1969 int call_close = 0;
1970
1971 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1972 return;
1973
1974 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1975 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1976 spin_lock(&state->owner->so_lock);
1977 /* Calculate the change in open mode */
1978 if (state->n_rdwr == 0) {
1979 if (state->n_rdonly == 0) {
1980 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1981 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1982 calldata->arg.fmode &= ~FMODE_READ;
1983 }
1984 if (state->n_wronly == 0) {
1985 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1986 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1987 calldata->arg.fmode &= ~FMODE_WRITE;
1988 }
1989 }
1990 spin_unlock(&state->owner->so_lock);
1991
1992 if (!call_close) {
1993 /* Note: exit _without_ calling nfs4_close_done */
1994 task->tk_action = NULL;
1995 return;
1996 }
1997
1998 if (calldata->arg.fmode == 0) {
1999 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2000 if (calldata->roc &&
2001 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2002 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2003 task, NULL);
2004 return;
2005 }
2006 }
2007
2008 nfs_fattr_init(calldata->res.fattr);
2009 calldata->timestamp = jiffies;
2010 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2011 &calldata->arg.seq_args, &calldata->res.seq_res,
2012 1, task))
2013 return;
2014 rpc_call_start(task);
2015}
2016
2017static const struct rpc_call_ops nfs4_close_ops = {
2018 .rpc_call_prepare = nfs4_close_prepare,
2019 .rpc_call_done = nfs4_close_done,
2020 .rpc_release = nfs4_free_closedata,
2021};
2022
2023/*
2024 * It is possible for data to be read/written from a mem-mapped file
2025 * after the sys_close call (which hits the vfs layer as a flush).
2026 * This means that we can't safely call nfsv4 close on a file until
2027 * the inode is cleared. This in turn means that we are not good
2028 * NFSv4 citizens - we do not indicate to the server to update the file's
2029 * share state even when we are done with one of the three share
2030 * stateid's in the inode.
2031 *
2032 * NOTE: Caller must be holding the sp->so_owner semaphore!
2033 */
2034int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2035{
2036 struct nfs_server *server = NFS_SERVER(state->inode);
2037 struct nfs4_closedata *calldata;
2038 struct nfs4_state_owner *sp = state->owner;
2039 struct rpc_task *task;
2040 struct rpc_message msg = {
2041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2042 .rpc_cred = state->owner->so_cred,
2043 };
2044 struct rpc_task_setup task_setup_data = {
2045 .rpc_client = server->client,
2046 .rpc_message = &msg,
2047 .callback_ops = &nfs4_close_ops,
2048 .workqueue = nfsiod_workqueue,
2049 .flags = RPC_TASK_ASYNC,
2050 };
2051 int status = -ENOMEM;
2052
2053 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2054 if (calldata == NULL)
2055 goto out;
2056 calldata->inode = state->inode;
2057 calldata->state = state;
2058 calldata->arg.fh = NFS_FH(state->inode);
2059 calldata->arg.stateid = &state->open_stateid;
2060 /* Serialization for the sequence id */
2061 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2062 if (calldata->arg.seqid == NULL)
2063 goto out_free_calldata;
2064 calldata->arg.fmode = 0;
2065 calldata->arg.bitmask = server->cache_consistency_bitmask;
2066 calldata->res.fattr = &calldata->fattr;
2067 calldata->res.seqid = calldata->arg.seqid;
2068 calldata->res.server = server;
2069 calldata->roc = roc;
2070 nfs_sb_active(calldata->inode->i_sb);
2071
2072 msg.rpc_argp = &calldata->arg;
2073 msg.rpc_resp = &calldata->res;
2074 task_setup_data.callback_data = calldata;
2075 task = rpc_run_task(&task_setup_data);
2076 if (IS_ERR(task))
2077 return PTR_ERR(task);
2078 status = 0;
2079 if (wait)
2080 status = rpc_wait_for_completion_task(task);
2081 rpc_put_task(task);
2082 return status;
2083out_free_calldata:
2084 kfree(calldata);
2085out:
2086 if (roc)
2087 pnfs_roc_release(state->inode);
2088 nfs4_put_open_state(state);
2089 nfs4_put_state_owner(sp);
2090 return status;
2091}
2092
2093static struct inode *
2094nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2095{
2096 struct nfs4_state *state;
2097
2098 /* Protect against concurrent sillydeletes */
2099 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2100 if (IS_ERR(state))
2101 return ERR_CAST(state);
2102 ctx->state = state;
2103 return igrab(state->inode);
2104}
2105
2106static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2107{
2108 if (ctx->state == NULL)
2109 return;
2110 if (is_sync)
2111 nfs4_close_sync(ctx->state, ctx->mode);
2112 else
2113 nfs4_close_state(ctx->state, ctx->mode);
2114}
2115
2116static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2117{
2118 struct nfs4_server_caps_arg args = {
2119 .fhandle = fhandle,
2120 };
2121 struct nfs4_server_caps_res res = {};
2122 struct rpc_message msg = {
2123 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2124 .rpc_argp = &args,
2125 .rpc_resp = &res,
2126 };
2127 int status;
2128
2129 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2130 if (status == 0) {
2131 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2132 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2133 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2134 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2135 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2136 NFS_CAP_CTIME|NFS_CAP_MTIME);
2137 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2138 server->caps |= NFS_CAP_ACLS;
2139 if (res.has_links != 0)
2140 server->caps |= NFS_CAP_HARDLINKS;
2141 if (res.has_symlinks != 0)
2142 server->caps |= NFS_CAP_SYMLINKS;
2143 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2144 server->caps |= NFS_CAP_FILEID;
2145 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2146 server->caps |= NFS_CAP_MODE;
2147 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2148 server->caps |= NFS_CAP_NLINK;
2149 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2150 server->caps |= NFS_CAP_OWNER;
2151 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2152 server->caps |= NFS_CAP_OWNER_GROUP;
2153 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2154 server->caps |= NFS_CAP_ATIME;
2155 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2156 server->caps |= NFS_CAP_CTIME;
2157 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2158 server->caps |= NFS_CAP_MTIME;
2159
2160 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2161 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2162 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2163 server->acl_bitmask = res.acl_bitmask;
2164 }
2165
2166 return status;
2167}
2168
2169int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2170{
2171 struct nfs4_exception exception = { };
2172 int err;
2173 do {
2174 err = nfs4_handle_exception(server,
2175 _nfs4_server_capabilities(server, fhandle),
2176 &exception);
2177 } while (exception.retry);
2178 return err;
2179}
2180
2181static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2182 struct nfs_fsinfo *info)
2183{
2184 struct nfs4_lookup_root_arg args = {
2185 .bitmask = nfs4_fattr_bitmap,
2186 };
2187 struct nfs4_lookup_res res = {
2188 .server = server,
2189 .fattr = info->fattr,
2190 .fh = fhandle,
2191 };
2192 struct rpc_message msg = {
2193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2194 .rpc_argp = &args,
2195 .rpc_resp = &res,
2196 };
2197
2198 nfs_fattr_init(info->fattr);
2199 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2200}
2201
2202static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2203 struct nfs_fsinfo *info)
2204{
2205 struct nfs4_exception exception = { };
2206 int err;
2207 do {
2208 err = _nfs4_lookup_root(server, fhandle, info);
2209 switch (err) {
2210 case 0:
2211 case -NFS4ERR_WRONGSEC:
2212 break;
2213 default:
2214 err = nfs4_handle_exception(server, err, &exception);
2215 }
2216 } while (exception.retry);
2217 return err;
2218}
2219
2220static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2221 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2222{
2223 struct rpc_auth *auth;
2224 int ret;
2225
2226 auth = rpcauth_create(flavor, server->client);
2227 if (!auth) {
2228 ret = -EIO;
2229 goto out;
2230 }
2231 ret = nfs4_lookup_root(server, fhandle, info);
2232out:
2233 return ret;
2234}
2235
2236static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2237 struct nfs_fsinfo *info)
2238{
2239 int i, len, status = 0;
2240 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2241
2242 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2243 flav_array[len] = RPC_AUTH_NULL;
2244 len += 1;
2245
2246 for (i = 0; i < len; i++) {
2247 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2248 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2249 continue;
2250 break;
2251 }
2252 /*
2253 * -EACCESS could mean that the user doesn't have correct permissions
2254 * to access the mount. It could also mean that we tried to mount
2255 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2256 * existing mount programs don't handle -EACCES very well so it should
2257 * be mapped to -EPERM instead.
2258 */
2259 if (status == -EACCES)
2260 status = -EPERM;
2261 return status;
2262}
2263
2264/*
2265 * get the file handle for the "/" directory on the server
2266 */
2267static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2268 struct nfs_fsinfo *info)
2269{
2270 int minor_version = server->nfs_client->cl_minorversion;
2271 int status = nfs4_lookup_root(server, fhandle, info);
2272 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2273 /*
2274 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2275 * by nfs4_map_errors() as this function exits.
2276 */
2277 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2278 if (status == 0)
2279 status = nfs4_server_capabilities(server, fhandle);
2280 if (status == 0)
2281 status = nfs4_do_fsinfo(server, fhandle, info);
2282 return nfs4_map_errors(status);
2283}
2284
2285static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2286/*
2287 * Get locations and (maybe) other attributes of a referral.
2288 * Note that we'll actually follow the referral later when
2289 * we detect fsid mismatch in inode revalidation
2290 */
2291static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2292 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2293{
2294 int status = -ENOMEM;
2295 struct page *page = NULL;
2296 struct nfs4_fs_locations *locations = NULL;
2297
2298 page = alloc_page(GFP_KERNEL);
2299 if (page == NULL)
2300 goto out;
2301 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2302 if (locations == NULL)
2303 goto out;
2304
2305 status = nfs4_proc_fs_locations(dir, name, locations, page);
2306 if (status != 0)
2307 goto out;
2308 /* Make sure server returned a different fsid for the referral */
2309 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2310 dprintk("%s: server did not return a different fsid for"
2311 " a referral at %s\n", __func__, name->name);
2312 status = -EIO;
2313 goto out;
2314 }
2315 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2316 nfs_fixup_referral_attributes(&locations->fattr);
2317
2318 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2319 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2320 memset(fhandle, 0, sizeof(struct nfs_fh));
2321out:
2322 if (page)
2323 __free_page(page);
2324 kfree(locations);
2325 return status;
2326}
2327
2328static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2329{
2330 struct nfs4_getattr_arg args = {
2331 .fh = fhandle,
2332 .bitmask = server->attr_bitmask,
2333 };
2334 struct nfs4_getattr_res res = {
2335 .fattr = fattr,
2336 .server = server,
2337 };
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2340 .rpc_argp = &args,
2341 .rpc_resp = &res,
2342 };
2343
2344 nfs_fattr_init(fattr);
2345 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2346}
2347
2348static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2349{
2350 struct nfs4_exception exception = { };
2351 int err;
2352 do {
2353 err = nfs4_handle_exception(server,
2354 _nfs4_proc_getattr(server, fhandle, fattr),
2355 &exception);
2356 } while (exception.retry);
2357 return err;
2358}
2359
2360/*
2361 * The file is not closed if it is opened due to the a request to change
2362 * the size of the file. The open call will not be needed once the
2363 * VFS layer lookup-intents are implemented.
2364 *
2365 * Close is called when the inode is destroyed.
2366 * If we haven't opened the file for O_WRONLY, we
2367 * need to in the size_change case to obtain a stateid.
2368 *
2369 * Got race?
2370 * Because OPEN is always done by name in nfsv4, it is
2371 * possible that we opened a different file by the same
2372 * name. We can recognize this race condition, but we
2373 * can't do anything about it besides returning an error.
2374 *
2375 * This will be fixed with VFS changes (lookup-intent).
2376 */
2377static int
2378nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2379 struct iattr *sattr)
2380{
2381 struct inode *inode = dentry->d_inode;
2382 struct rpc_cred *cred = NULL;
2383 struct nfs4_state *state = NULL;
2384 int status;
2385
2386 if (pnfs_ld_layoutret_on_setattr(inode))
2387 pnfs_return_layout(inode);
2388
2389 nfs_fattr_init(fattr);
2390
2391 /* Search for an existing open(O_WRITE) file */
2392 if (sattr->ia_valid & ATTR_FILE) {
2393 struct nfs_open_context *ctx;
2394
2395 ctx = nfs_file_open_context(sattr->ia_file);
2396 if (ctx) {
2397 cred = ctx->cred;
2398 state = ctx->state;
2399 }
2400 }
2401
2402 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2403 if (status == 0)
2404 nfs_setattr_update_inode(inode, sattr);
2405 return status;
2406}
2407
2408static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2409 const struct qstr *name, struct nfs_fh *fhandle,
2410 struct nfs_fattr *fattr)
2411{
2412 struct nfs_server *server = NFS_SERVER(dir);
2413 int status;
2414 struct nfs4_lookup_arg args = {
2415 .bitmask = server->attr_bitmask,
2416 .dir_fh = NFS_FH(dir),
2417 .name = name,
2418 };
2419 struct nfs4_lookup_res res = {
2420 .server = server,
2421 .fattr = fattr,
2422 .fh = fhandle,
2423 };
2424 struct rpc_message msg = {
2425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2426 .rpc_argp = &args,
2427 .rpc_resp = &res,
2428 };
2429
2430 nfs_fattr_init(fattr);
2431
2432 dprintk("NFS call lookup %s\n", name->name);
2433 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2434 dprintk("NFS reply lookup: %d\n", status);
2435 return status;
2436}
2437
2438void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2439{
2440 memset(fh, 0, sizeof(struct nfs_fh));
2441 fattr->fsid.major = 1;
2442 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2443 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2444 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2445 fattr->nlink = 2;
2446}
2447
2448static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2449 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2450{
2451 struct nfs4_exception exception = { };
2452 int err;
2453 do {
2454 int status;
2455
2456 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2457 switch (status) {
2458 case -NFS4ERR_MOVED:
2459 err = nfs4_get_referral(dir, name, fattr, fhandle);
2460 break;
2461 case -NFS4ERR_WRONGSEC:
2462 nfs_fixup_secinfo_attributes(fattr, fhandle);
2463 }
2464 err = nfs4_handle_exception(NFS_SERVER(dir),
2465 status, &exception);
2466 } while (exception.retry);
2467 return err;
2468}
2469
2470static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2471{
2472 struct nfs_server *server = NFS_SERVER(inode);
2473 struct nfs4_accessargs args = {
2474 .fh = NFS_FH(inode),
2475 .bitmask = server->attr_bitmask,
2476 };
2477 struct nfs4_accessres res = {
2478 .server = server,
2479 };
2480 struct rpc_message msg = {
2481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2482 .rpc_argp = &args,
2483 .rpc_resp = &res,
2484 .rpc_cred = entry->cred,
2485 };
2486 int mode = entry->mask;
2487 int status;
2488
2489 /*
2490 * Determine which access bits we want to ask for...
2491 */
2492 if (mode & MAY_READ)
2493 args.access |= NFS4_ACCESS_READ;
2494 if (S_ISDIR(inode->i_mode)) {
2495 if (mode & MAY_WRITE)
2496 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2497 if (mode & MAY_EXEC)
2498 args.access |= NFS4_ACCESS_LOOKUP;
2499 } else {
2500 if (mode & MAY_WRITE)
2501 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2502 if (mode & MAY_EXEC)
2503 args.access |= NFS4_ACCESS_EXECUTE;
2504 }
2505
2506 res.fattr = nfs_alloc_fattr();
2507 if (res.fattr == NULL)
2508 return -ENOMEM;
2509
2510 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2511 if (!status) {
2512 entry->mask = 0;
2513 if (res.access & NFS4_ACCESS_READ)
2514 entry->mask |= MAY_READ;
2515 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2516 entry->mask |= MAY_WRITE;
2517 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2518 entry->mask |= MAY_EXEC;
2519 nfs_refresh_inode(inode, res.fattr);
2520 }
2521 nfs_free_fattr(res.fattr);
2522 return status;
2523}
2524
2525static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2526{
2527 struct nfs4_exception exception = { };
2528 int err;
2529 do {
2530 err = nfs4_handle_exception(NFS_SERVER(inode),
2531 _nfs4_proc_access(inode, entry),
2532 &exception);
2533 } while (exception.retry);
2534 return err;
2535}
2536
2537/*
2538 * TODO: For the time being, we don't try to get any attributes
2539 * along with any of the zero-copy operations READ, READDIR,
2540 * READLINK, WRITE.
2541 *
2542 * In the case of the first three, we want to put the GETATTR
2543 * after the read-type operation -- this is because it is hard
2544 * to predict the length of a GETATTR response in v4, and thus
2545 * align the READ data correctly. This means that the GETATTR
2546 * may end up partially falling into the page cache, and we should
2547 * shift it into the 'tail' of the xdr_buf before processing.
2548 * To do this efficiently, we need to know the total length
2549 * of data received, which doesn't seem to be available outside
2550 * of the RPC layer.
2551 *
2552 * In the case of WRITE, we also want to put the GETATTR after
2553 * the operation -- in this case because we want to make sure
2554 * we get the post-operation mtime and size. This means that
2555 * we can't use xdr_encode_pages() as written: we need a variant
2556 * of it which would leave room in the 'tail' iovec.
2557 *
2558 * Both of these changes to the XDR layer would in fact be quite
2559 * minor, but I decided to leave them for a subsequent patch.
2560 */
2561static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2562 unsigned int pgbase, unsigned int pglen)
2563{
2564 struct nfs4_readlink args = {
2565 .fh = NFS_FH(inode),
2566 .pgbase = pgbase,
2567 .pglen = pglen,
2568 .pages = &page,
2569 };
2570 struct nfs4_readlink_res res;
2571 struct rpc_message msg = {
2572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2573 .rpc_argp = &args,
2574 .rpc_resp = &res,
2575 };
2576
2577 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2578}
2579
2580static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2581 unsigned int pgbase, unsigned int pglen)
2582{
2583 struct nfs4_exception exception = { };
2584 int err;
2585 do {
2586 err = nfs4_handle_exception(NFS_SERVER(inode),
2587 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2588 &exception);
2589 } while (exception.retry);
2590 return err;
2591}
2592
2593/*
2594 * Got race?
2595 * We will need to arrange for the VFS layer to provide an atomic open.
2596 * Until then, this create/open method is prone to inefficiency and race
2597 * conditions due to the lookup, create, and open VFS calls from sys_open()
2598 * placed on the wire.
2599 *
2600 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2601 * The file will be opened again in the subsequent VFS open call
2602 * (nfs4_proc_file_open).
2603 *
2604 * The open for read will just hang around to be used by any process that
2605 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2606 */
2607
2608static int
2609nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2610 int flags, struct nfs_open_context *ctx)
2611{
2612 struct dentry *de = dentry;
2613 struct nfs4_state *state;
2614 struct rpc_cred *cred = NULL;
2615 fmode_t fmode = 0;
2616 int status = 0;
2617
2618 if (ctx != NULL) {
2619 cred = ctx->cred;
2620 de = ctx->dentry;
2621 fmode = ctx->mode;
2622 }
2623 sattr->ia_mode &= ~current_umask();
2624 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2625 d_drop(dentry);
2626 if (IS_ERR(state)) {
2627 status = PTR_ERR(state);
2628 goto out;
2629 }
2630 d_add(dentry, igrab(state->inode));
2631 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2632 if (ctx != NULL)
2633 ctx->state = state;
2634 else
2635 nfs4_close_sync(state, fmode);
2636out:
2637 return status;
2638}
2639
2640static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2641{
2642 struct nfs_server *server = NFS_SERVER(dir);
2643 struct nfs_removeargs args = {
2644 .fh = NFS_FH(dir),
2645 .name.len = name->len,
2646 .name.name = name->name,
2647 .bitmask = server->attr_bitmask,
2648 };
2649 struct nfs_removeres res = {
2650 .server = server,
2651 };
2652 struct rpc_message msg = {
2653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2654 .rpc_argp = &args,
2655 .rpc_resp = &res,
2656 };
2657 int status = -ENOMEM;
2658
2659 res.dir_attr = nfs_alloc_fattr();
2660 if (res.dir_attr == NULL)
2661 goto out;
2662
2663 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2664 if (status == 0) {
2665 update_changeattr(dir, &res.cinfo);
2666 nfs_post_op_update_inode(dir, res.dir_attr);
2667 }
2668 nfs_free_fattr(res.dir_attr);
2669out:
2670 return status;
2671}
2672
2673static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2674{
2675 struct nfs4_exception exception = { };
2676 int err;
2677 do {
2678 err = nfs4_handle_exception(NFS_SERVER(dir),
2679 _nfs4_proc_remove(dir, name),
2680 &exception);
2681 } while (exception.retry);
2682 return err;
2683}
2684
2685static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2686{
2687 struct nfs_server *server = NFS_SERVER(dir);
2688 struct nfs_removeargs *args = msg->rpc_argp;
2689 struct nfs_removeres *res = msg->rpc_resp;
2690
2691 args->bitmask = server->cache_consistency_bitmask;
2692 res->server = server;
2693 res->seq_res.sr_slot = NULL;
2694 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2695}
2696
2697static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2698{
2699 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2700
2701 if (!nfs4_sequence_done(task, &res->seq_res))
2702 return 0;
2703 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2704 return 0;
2705 update_changeattr(dir, &res->cinfo);
2706 nfs_post_op_update_inode(dir, res->dir_attr);
2707 return 1;
2708}
2709
2710static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2711{
2712 struct nfs_server *server = NFS_SERVER(dir);
2713 struct nfs_renameargs *arg = msg->rpc_argp;
2714 struct nfs_renameres *res = msg->rpc_resp;
2715
2716 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2717 arg->bitmask = server->attr_bitmask;
2718 res->server = server;
2719}
2720
2721static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2722 struct inode *new_dir)
2723{
2724 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2725
2726 if (!nfs4_sequence_done(task, &res->seq_res))
2727 return 0;
2728 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2729 return 0;
2730
2731 update_changeattr(old_dir, &res->old_cinfo);
2732 nfs_post_op_update_inode(old_dir, res->old_fattr);
2733 update_changeattr(new_dir, &res->new_cinfo);
2734 nfs_post_op_update_inode(new_dir, res->new_fattr);
2735 return 1;
2736}
2737
2738static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2739 struct inode *new_dir, struct qstr *new_name)
2740{
2741 struct nfs_server *server = NFS_SERVER(old_dir);
2742 struct nfs_renameargs arg = {
2743 .old_dir = NFS_FH(old_dir),
2744 .new_dir = NFS_FH(new_dir),
2745 .old_name = old_name,
2746 .new_name = new_name,
2747 .bitmask = server->attr_bitmask,
2748 };
2749 struct nfs_renameres res = {
2750 .server = server,
2751 };
2752 struct rpc_message msg = {
2753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2754 .rpc_argp = &arg,
2755 .rpc_resp = &res,
2756 };
2757 int status = -ENOMEM;
2758
2759 res.old_fattr = nfs_alloc_fattr();
2760 res.new_fattr = nfs_alloc_fattr();
2761 if (res.old_fattr == NULL || res.new_fattr == NULL)
2762 goto out;
2763
2764 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2765 if (!status) {
2766 update_changeattr(old_dir, &res.old_cinfo);
2767 nfs_post_op_update_inode(old_dir, res.old_fattr);
2768 update_changeattr(new_dir, &res.new_cinfo);
2769 nfs_post_op_update_inode(new_dir, res.new_fattr);
2770 }
2771out:
2772 nfs_free_fattr(res.new_fattr);
2773 nfs_free_fattr(res.old_fattr);
2774 return status;
2775}
2776
2777static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2778 struct inode *new_dir, struct qstr *new_name)
2779{
2780 struct nfs4_exception exception = { };
2781 int err;
2782 do {
2783 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2784 _nfs4_proc_rename(old_dir, old_name,
2785 new_dir, new_name),
2786 &exception);
2787 } while (exception.retry);
2788 return err;
2789}
2790
2791static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2792{
2793 struct nfs_server *server = NFS_SERVER(inode);
2794 struct nfs4_link_arg arg = {
2795 .fh = NFS_FH(inode),
2796 .dir_fh = NFS_FH(dir),
2797 .name = name,
2798 .bitmask = server->attr_bitmask,
2799 };
2800 struct nfs4_link_res res = {
2801 .server = server,
2802 };
2803 struct rpc_message msg = {
2804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2805 .rpc_argp = &arg,
2806 .rpc_resp = &res,
2807 };
2808 int status = -ENOMEM;
2809
2810 res.fattr = nfs_alloc_fattr();
2811 res.dir_attr = nfs_alloc_fattr();
2812 if (res.fattr == NULL || res.dir_attr == NULL)
2813 goto out;
2814
2815 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2816 if (!status) {
2817 update_changeattr(dir, &res.cinfo);
2818 nfs_post_op_update_inode(dir, res.dir_attr);
2819 nfs_post_op_update_inode(inode, res.fattr);
2820 }
2821out:
2822 nfs_free_fattr(res.dir_attr);
2823 nfs_free_fattr(res.fattr);
2824 return status;
2825}
2826
2827static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2828{
2829 struct nfs4_exception exception = { };
2830 int err;
2831 do {
2832 err = nfs4_handle_exception(NFS_SERVER(inode),
2833 _nfs4_proc_link(inode, dir, name),
2834 &exception);
2835 } while (exception.retry);
2836 return err;
2837}
2838
2839struct nfs4_createdata {
2840 struct rpc_message msg;
2841 struct nfs4_create_arg arg;
2842 struct nfs4_create_res res;
2843 struct nfs_fh fh;
2844 struct nfs_fattr fattr;
2845 struct nfs_fattr dir_fattr;
2846};
2847
2848static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2849 struct qstr *name, struct iattr *sattr, u32 ftype)
2850{
2851 struct nfs4_createdata *data;
2852
2853 data = kzalloc(sizeof(*data), GFP_KERNEL);
2854 if (data != NULL) {
2855 struct nfs_server *server = NFS_SERVER(dir);
2856
2857 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2858 data->msg.rpc_argp = &data->arg;
2859 data->msg.rpc_resp = &data->res;
2860 data->arg.dir_fh = NFS_FH(dir);
2861 data->arg.server = server;
2862 data->arg.name = name;
2863 data->arg.attrs = sattr;
2864 data->arg.ftype = ftype;
2865 data->arg.bitmask = server->attr_bitmask;
2866 data->res.server = server;
2867 data->res.fh = &data->fh;
2868 data->res.fattr = &data->fattr;
2869 data->res.dir_fattr = &data->dir_fattr;
2870 nfs_fattr_init(data->res.fattr);
2871 nfs_fattr_init(data->res.dir_fattr);
2872 }
2873 return data;
2874}
2875
2876static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2877{
2878 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2879 &data->arg.seq_args, &data->res.seq_res, 1);
2880 if (status == 0) {
2881 update_changeattr(dir, &data->res.dir_cinfo);
2882 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2883 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2884 }
2885 return status;
2886}
2887
2888static void nfs4_free_createdata(struct nfs4_createdata *data)
2889{
2890 kfree(data);
2891}
2892
2893static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2894 struct page *page, unsigned int len, struct iattr *sattr)
2895{
2896 struct nfs4_createdata *data;
2897 int status = -ENAMETOOLONG;
2898
2899 if (len > NFS4_MAXPATHLEN)
2900 goto out;
2901
2902 status = -ENOMEM;
2903 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2904 if (data == NULL)
2905 goto out;
2906
2907 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2908 data->arg.u.symlink.pages = &page;
2909 data->arg.u.symlink.len = len;
2910
2911 status = nfs4_do_create(dir, dentry, data);
2912
2913 nfs4_free_createdata(data);
2914out:
2915 return status;
2916}
2917
2918static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2919 struct page *page, unsigned int len, struct iattr *sattr)
2920{
2921 struct nfs4_exception exception = { };
2922 int err;
2923 do {
2924 err = nfs4_handle_exception(NFS_SERVER(dir),
2925 _nfs4_proc_symlink(dir, dentry, page,
2926 len, sattr),
2927 &exception);
2928 } while (exception.retry);
2929 return err;
2930}
2931
2932static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2933 struct iattr *sattr)
2934{
2935 struct nfs4_createdata *data;
2936 int status = -ENOMEM;
2937
2938 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2939 if (data == NULL)
2940 goto out;
2941
2942 status = nfs4_do_create(dir, dentry, data);
2943
2944 nfs4_free_createdata(data);
2945out:
2946 return status;
2947}
2948
2949static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2950 struct iattr *sattr)
2951{
2952 struct nfs4_exception exception = { };
2953 int err;
2954
2955 sattr->ia_mode &= ~current_umask();
2956 do {
2957 err = nfs4_handle_exception(NFS_SERVER(dir),
2958 _nfs4_proc_mkdir(dir, dentry, sattr),
2959 &exception);
2960 } while (exception.retry);
2961 return err;
2962}
2963
2964static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2965 u64 cookie, struct page **pages, unsigned int count, int plus)
2966{
2967 struct inode *dir = dentry->d_inode;
2968 struct nfs4_readdir_arg args = {
2969 .fh = NFS_FH(dir),
2970 .pages = pages,
2971 .pgbase = 0,
2972 .count = count,
2973 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2974 .plus = plus,
2975 };
2976 struct nfs4_readdir_res res;
2977 struct rpc_message msg = {
2978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2979 .rpc_argp = &args,
2980 .rpc_resp = &res,
2981 .rpc_cred = cred,
2982 };
2983 int status;
2984
2985 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2986 dentry->d_parent->d_name.name,
2987 dentry->d_name.name,
2988 (unsigned long long)cookie);
2989 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2990 res.pgbase = args.pgbase;
2991 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
2992 if (status >= 0) {
2993 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2994 status += args.pgbase;
2995 }
2996
2997 nfs_invalidate_atime(dir);
2998
2999 dprintk("%s: returns %d\n", __func__, status);
3000 return status;
3001}
3002
3003static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3004 u64 cookie, struct page **pages, unsigned int count, int plus)
3005{
3006 struct nfs4_exception exception = { };
3007 int err;
3008 do {
3009 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3010 _nfs4_proc_readdir(dentry, cred, cookie,
3011 pages, count, plus),
3012 &exception);
3013 } while (exception.retry);
3014 return err;
3015}
3016
3017static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3018 struct iattr *sattr, dev_t rdev)
3019{
3020 struct nfs4_createdata *data;
3021 int mode = sattr->ia_mode;
3022 int status = -ENOMEM;
3023
3024 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3025 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3026
3027 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3028 if (data == NULL)
3029 goto out;
3030
3031 if (S_ISFIFO(mode))
3032 data->arg.ftype = NF4FIFO;
3033 else if (S_ISBLK(mode)) {
3034 data->arg.ftype = NF4BLK;
3035 data->arg.u.device.specdata1 = MAJOR(rdev);
3036 data->arg.u.device.specdata2 = MINOR(rdev);
3037 }
3038 else if (S_ISCHR(mode)) {
3039 data->arg.ftype = NF4CHR;
3040 data->arg.u.device.specdata1 = MAJOR(rdev);
3041 data->arg.u.device.specdata2 = MINOR(rdev);
3042 }
3043
3044 status = nfs4_do_create(dir, dentry, data);
3045
3046 nfs4_free_createdata(data);
3047out:
3048 return status;
3049}
3050
3051static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3052 struct iattr *sattr, dev_t rdev)
3053{
3054 struct nfs4_exception exception = { };
3055 int err;
3056
3057 sattr->ia_mode &= ~current_umask();
3058 do {
3059 err = nfs4_handle_exception(NFS_SERVER(dir),
3060 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3061 &exception);
3062 } while (exception.retry);
3063 return err;
3064}
3065
3066static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3067 struct nfs_fsstat *fsstat)
3068{
3069 struct nfs4_statfs_arg args = {
3070 .fh = fhandle,
3071 .bitmask = server->attr_bitmask,
3072 };
3073 struct nfs4_statfs_res res = {
3074 .fsstat = fsstat,
3075 };
3076 struct rpc_message msg = {
3077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3078 .rpc_argp = &args,
3079 .rpc_resp = &res,
3080 };
3081
3082 nfs_fattr_init(fsstat->fattr);
3083 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3084}
3085
3086static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3087{
3088 struct nfs4_exception exception = { };
3089 int err;
3090 do {
3091 err = nfs4_handle_exception(server,
3092 _nfs4_proc_statfs(server, fhandle, fsstat),
3093 &exception);
3094 } while (exception.retry);
3095 return err;
3096}
3097
3098static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3099 struct nfs_fsinfo *fsinfo)
3100{
3101 struct nfs4_fsinfo_arg args = {
3102 .fh = fhandle,
3103 .bitmask = server->attr_bitmask,
3104 };
3105 struct nfs4_fsinfo_res res = {
3106 .fsinfo = fsinfo,
3107 };
3108 struct rpc_message msg = {
3109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3110 .rpc_argp = &args,
3111 .rpc_resp = &res,
3112 };
3113
3114 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3115}
3116
3117static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3118{
3119 struct nfs4_exception exception = { };
3120 int err;
3121
3122 do {
3123 err = nfs4_handle_exception(server,
3124 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3125 &exception);
3126 } while (exception.retry);
3127 return err;
3128}
3129
3130static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3131{
3132 nfs_fattr_init(fsinfo->fattr);
3133 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3134}
3135
3136static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3137 struct nfs_pathconf *pathconf)
3138{
3139 struct nfs4_pathconf_arg args = {
3140 .fh = fhandle,
3141 .bitmask = server->attr_bitmask,
3142 };
3143 struct nfs4_pathconf_res res = {
3144 .pathconf = pathconf,
3145 };
3146 struct rpc_message msg = {
3147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3148 .rpc_argp = &args,
3149 .rpc_resp = &res,
3150 };
3151
3152 /* None of the pathconf attributes are mandatory to implement */
3153 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3154 memset(pathconf, 0, sizeof(*pathconf));
3155 return 0;
3156 }
3157
3158 nfs_fattr_init(pathconf->fattr);
3159 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3160}
3161
3162static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3163 struct nfs_pathconf *pathconf)
3164{
3165 struct nfs4_exception exception = { };
3166 int err;
3167
3168 do {
3169 err = nfs4_handle_exception(server,
3170 _nfs4_proc_pathconf(server, fhandle, pathconf),
3171 &exception);
3172 } while (exception.retry);
3173 return err;
3174}
3175
3176void __nfs4_read_done_cb(struct nfs_read_data *data)
3177{
3178 nfs_invalidate_atime(data->inode);
3179}
3180
3181static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3182{
3183 struct nfs_server *server = NFS_SERVER(data->inode);
3184
3185 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3186 nfs_restart_rpc(task, server->nfs_client);
3187 return -EAGAIN;
3188 }
3189
3190 __nfs4_read_done_cb(data);
3191 if (task->tk_status > 0)
3192 renew_lease(server, data->timestamp);
3193 return 0;
3194}
3195
3196static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3197{
3198
3199 dprintk("--> %s\n", __func__);
3200
3201 if (!nfs4_sequence_done(task, &data->res.seq_res))
3202 return -EAGAIN;
3203
3204 return data->read_done_cb ? data->read_done_cb(task, data) :
3205 nfs4_read_done_cb(task, data);
3206}
3207
3208static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3209{
3210 data->timestamp = jiffies;
3211 data->read_done_cb = nfs4_read_done_cb;
3212 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3213}
3214
3215/* Reset the the nfs_read_data to send the read to the MDS. */
3216void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3217{
3218 dprintk("%s Reset task for i/o through\n", __func__);
3219 put_lseg(data->lseg);
3220 data->lseg = NULL;
3221 /* offsets will differ in the dense stripe case */
3222 data->args.offset = data->mds_offset;
3223 data->ds_clp = NULL;
3224 data->args.fh = NFS_FH(data->inode);
3225 data->read_done_cb = nfs4_read_done_cb;
3226 task->tk_ops = data->mds_ops;
3227 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3228}
3229EXPORT_SYMBOL_GPL(nfs4_reset_read);
3230
3231static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3232{
3233 struct inode *inode = data->inode;
3234
3235 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3236 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3237 return -EAGAIN;
3238 }
3239 if (task->tk_status >= 0) {
3240 renew_lease(NFS_SERVER(inode), data->timestamp);
3241 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3242 }
3243 return 0;
3244}
3245
3246static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3247{
3248 if (!nfs4_sequence_done(task, &data->res.seq_res))
3249 return -EAGAIN;
3250 return data->write_done_cb ? data->write_done_cb(task, data) :
3251 nfs4_write_done_cb(task, data);
3252}
3253
3254/* Reset the the nfs_write_data to send the write to the MDS. */
3255void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3256{
3257 dprintk("%s Reset task for i/o through\n", __func__);
3258 put_lseg(data->lseg);
3259 data->lseg = NULL;
3260 data->ds_clp = NULL;
3261 data->write_done_cb = nfs4_write_done_cb;
3262 data->args.fh = NFS_FH(data->inode);
3263 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3264 data->args.offset = data->mds_offset;
3265 data->res.fattr = &data->fattr;
3266 task->tk_ops = data->mds_ops;
3267 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3268}
3269EXPORT_SYMBOL_GPL(nfs4_reset_write);
3270
3271static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3272{
3273 struct nfs_server *server = NFS_SERVER(data->inode);
3274
3275 if (data->lseg) {
3276 data->args.bitmask = NULL;
3277 data->res.fattr = NULL;
3278 } else
3279 data->args.bitmask = server->cache_consistency_bitmask;
3280 if (!data->write_done_cb)
3281 data->write_done_cb = nfs4_write_done_cb;
3282 data->res.server = server;
3283 data->timestamp = jiffies;
3284
3285 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3286}
3287
3288static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3289{
3290 struct inode *inode = data->inode;
3291
3292 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3293 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3294 return -EAGAIN;
3295 }
3296 nfs_refresh_inode(inode, data->res.fattr);
3297 return 0;
3298}
3299
3300static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3301{
3302 if (!nfs4_sequence_done(task, &data->res.seq_res))
3303 return -EAGAIN;
3304 return data->write_done_cb(task, data);
3305}
3306
3307static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3308{
3309 struct nfs_server *server = NFS_SERVER(data->inode);
3310
3311 if (data->lseg) {
3312 data->args.bitmask = NULL;
3313 data->res.fattr = NULL;
3314 } else
3315 data->args.bitmask = server->cache_consistency_bitmask;
3316 if (!data->write_done_cb)
3317 data->write_done_cb = nfs4_commit_done_cb;
3318 data->res.server = server;
3319 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3320}
3321
3322struct nfs4_renewdata {
3323 struct nfs_client *client;
3324 unsigned long timestamp;
3325};
3326
3327/*
3328 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3329 * standalone procedure for queueing an asynchronous RENEW.
3330 */
3331static void nfs4_renew_release(void *calldata)
3332{
3333 struct nfs4_renewdata *data = calldata;
3334 struct nfs_client *clp = data->client;
3335
3336 if (atomic_read(&clp->cl_count) > 1)
3337 nfs4_schedule_state_renewal(clp);
3338 nfs_put_client(clp);
3339 kfree(data);
3340}
3341
3342static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3343{
3344 struct nfs4_renewdata *data = calldata;
3345 struct nfs_client *clp = data->client;
3346 unsigned long timestamp = data->timestamp;
3347
3348 if (task->tk_status < 0) {
3349 /* Unless we're shutting down, schedule state recovery! */
3350 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3351 return;
3352 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3353 nfs4_schedule_lease_recovery(clp);
3354 return;
3355 }
3356 nfs4_schedule_path_down_recovery(clp);
3357 }
3358 do_renew_lease(clp, timestamp);
3359}
3360
3361static const struct rpc_call_ops nfs4_renew_ops = {
3362 .rpc_call_done = nfs4_renew_done,
3363 .rpc_release = nfs4_renew_release,
3364};
3365
3366static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3367{
3368 struct rpc_message msg = {
3369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3370 .rpc_argp = clp,
3371 .rpc_cred = cred,
3372 };
3373 struct nfs4_renewdata *data;
3374
3375 if (renew_flags == 0)
3376 return 0;
3377 if (!atomic_inc_not_zero(&clp->cl_count))
3378 return -EIO;
3379 data = kmalloc(sizeof(*data), GFP_NOFS);
3380 if (data == NULL)
3381 return -ENOMEM;
3382 data->client = clp;
3383 data->timestamp = jiffies;
3384 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3385 &nfs4_renew_ops, data);
3386}
3387
3388static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3389{
3390 struct rpc_message msg = {
3391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3392 .rpc_argp = clp,
3393 .rpc_cred = cred,
3394 };
3395 unsigned long now = jiffies;
3396 int status;
3397
3398 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3399 if (status < 0)
3400 return status;
3401 do_renew_lease(clp, now);
3402 return 0;
3403}
3404
3405static inline int nfs4_server_supports_acls(struct nfs_server *server)
3406{
3407 return (server->caps & NFS_CAP_ACLS)
3408 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3409 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3410}
3411
3412/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3413 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3414 * the stack.
3415 */
3416#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3417
3418static void buf_to_pages(const void *buf, size_t buflen,
3419 struct page **pages, unsigned int *pgbase)
3420{
3421 const void *p = buf;
3422
3423 *pgbase = offset_in_page(buf);
3424 p -= *pgbase;
3425 while (p < buf + buflen) {
3426 *(pages++) = virt_to_page(p);
3427 p += PAGE_CACHE_SIZE;
3428 }
3429}
3430
3431static int buf_to_pages_noslab(const void *buf, size_t buflen,
3432 struct page **pages, unsigned int *pgbase)
3433{
3434 struct page *newpage, **spages;
3435 int rc = 0;
3436 size_t len;
3437 spages = pages;
3438
3439 do {
3440 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3441 newpage = alloc_page(GFP_KERNEL);
3442
3443 if (newpage == NULL)
3444 goto unwind;
3445 memcpy(page_address(newpage), buf, len);
3446 buf += len;
3447 buflen -= len;
3448 *pages++ = newpage;
3449 rc++;
3450 } while (buflen != 0);
3451
3452 return rc;
3453
3454unwind:
3455 for(; rc > 0; rc--)
3456 __free_page(spages[rc-1]);
3457 return -ENOMEM;
3458}
3459
3460struct nfs4_cached_acl {
3461 int cached;
3462 size_t len;
3463 char data[0];
3464};
3465
3466static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3467{
3468 struct nfs_inode *nfsi = NFS_I(inode);
3469
3470 spin_lock(&inode->i_lock);
3471 kfree(nfsi->nfs4_acl);
3472 nfsi->nfs4_acl = acl;
3473 spin_unlock(&inode->i_lock);
3474}
3475
3476static void nfs4_zap_acl_attr(struct inode *inode)
3477{
3478 nfs4_set_cached_acl(inode, NULL);
3479}
3480
3481static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3482{
3483 struct nfs_inode *nfsi = NFS_I(inode);
3484 struct nfs4_cached_acl *acl;
3485 int ret = -ENOENT;
3486
3487 spin_lock(&inode->i_lock);
3488 acl = nfsi->nfs4_acl;
3489 if (acl == NULL)
3490 goto out;
3491 if (buf == NULL) /* user is just asking for length */
3492 goto out_len;
3493 if (acl->cached == 0)
3494 goto out;
3495 ret = -ERANGE; /* see getxattr(2) man page */
3496 if (acl->len > buflen)
3497 goto out;
3498 memcpy(buf, acl->data, acl->len);
3499out_len:
3500 ret = acl->len;
3501out:
3502 spin_unlock(&inode->i_lock);
3503 return ret;
3504}
3505
3506static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3507{
3508 struct nfs4_cached_acl *acl;
3509
3510 if (buf && acl_len <= PAGE_SIZE) {
3511 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3512 if (acl == NULL)
3513 goto out;
3514 acl->cached = 1;
3515 memcpy(acl->data, buf, acl_len);
3516 } else {
3517 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3518 if (acl == NULL)
3519 goto out;
3520 acl->cached = 0;
3521 }
3522 acl->len = acl_len;
3523out:
3524 nfs4_set_cached_acl(inode, acl);
3525}
3526
3527static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3528{
3529 struct page *pages[NFS4ACL_MAXPAGES];
3530 struct nfs_getaclargs args = {
3531 .fh = NFS_FH(inode),
3532 .acl_pages = pages,
3533 .acl_len = buflen,
3534 };
3535 struct nfs_getaclres res = {
3536 .acl_len = buflen,
3537 };
3538 void *resp_buf;
3539 struct rpc_message msg = {
3540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3541 .rpc_argp = &args,
3542 .rpc_resp = &res,
3543 };
3544 struct page *localpage = NULL;
3545 int ret;
3546
3547 if (buflen < PAGE_SIZE) {
3548 /* As long as we're doing a round trip to the server anyway,
3549 * let's be prepared for a page of acl data. */
3550 localpage = alloc_page(GFP_KERNEL);
3551 resp_buf = page_address(localpage);
3552 if (localpage == NULL)
3553 return -ENOMEM;
3554 args.acl_pages[0] = localpage;
3555 args.acl_pgbase = 0;
3556 args.acl_len = PAGE_SIZE;
3557 } else {
3558 resp_buf = buf;
3559 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3560 }
3561 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3562 if (ret)
3563 goto out_free;
3564 if (res.acl_len > args.acl_len)
3565 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3566 else
3567 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3568 if (buf) {
3569 ret = -ERANGE;
3570 if (res.acl_len > buflen)
3571 goto out_free;
3572 if (localpage)
3573 memcpy(buf, resp_buf, res.acl_len);
3574 }
3575 ret = res.acl_len;
3576out_free:
3577 if (localpage)
3578 __free_page(localpage);
3579 return ret;
3580}
3581
3582static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3583{
3584 struct nfs4_exception exception = { };
3585 ssize_t ret;
3586 do {
3587 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3588 if (ret >= 0)
3589 break;
3590 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3591 } while (exception.retry);
3592 return ret;
3593}
3594
3595static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3596{
3597 struct nfs_server *server = NFS_SERVER(inode);
3598 int ret;
3599
3600 if (!nfs4_server_supports_acls(server))
3601 return -EOPNOTSUPP;
3602 ret = nfs_revalidate_inode(server, inode);
3603 if (ret < 0)
3604 return ret;
3605 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3606 nfs_zap_acl_cache(inode);
3607 ret = nfs4_read_cached_acl(inode, buf, buflen);
3608 if (ret != -ENOENT)
3609 return ret;
3610 return nfs4_get_acl_uncached(inode, buf, buflen);
3611}
3612
3613static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3614{
3615 struct nfs_server *server = NFS_SERVER(inode);
3616 struct page *pages[NFS4ACL_MAXPAGES];
3617 struct nfs_setaclargs arg = {
3618 .fh = NFS_FH(inode),
3619 .acl_pages = pages,
3620 .acl_len = buflen,
3621 };
3622 struct nfs_setaclres res;
3623 struct rpc_message msg = {
3624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3625 .rpc_argp = &arg,
3626 .rpc_resp = &res,
3627 };
3628 int ret, i;
3629
3630 if (!nfs4_server_supports_acls(server))
3631 return -EOPNOTSUPP;
3632 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3633 if (i < 0)
3634 return i;
3635 nfs_inode_return_delegation(inode);
3636 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3637
3638 /*
3639 * Free each page after tx, so the only ref left is
3640 * held by the network stack
3641 */
3642 for (; i > 0; i--)
3643 put_page(pages[i-1]);
3644
3645 /*
3646 * Acl update can result in inode attribute update.
3647 * so mark the attribute cache invalid.
3648 */
3649 spin_lock(&inode->i_lock);
3650 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3651 spin_unlock(&inode->i_lock);
3652 nfs_access_zap_cache(inode);
3653 nfs_zap_acl_cache(inode);
3654 return ret;
3655}
3656
3657static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3658{
3659 struct nfs4_exception exception = { };
3660 int err;
3661 do {
3662 err = nfs4_handle_exception(NFS_SERVER(inode),
3663 __nfs4_proc_set_acl(inode, buf, buflen),
3664 &exception);
3665 } while (exception.retry);
3666 return err;
3667}
3668
3669static int
3670nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3671{
3672 struct nfs_client *clp = server->nfs_client;
3673
3674 if (task->tk_status >= 0)
3675 return 0;
3676 switch(task->tk_status) {
3677 case -NFS4ERR_ADMIN_REVOKED:
3678 case -NFS4ERR_BAD_STATEID:
3679 case -NFS4ERR_OPENMODE:
3680 if (state == NULL)
3681 break;
3682 nfs4_schedule_stateid_recovery(server, state);
3683 goto wait_on_recovery;
3684 case -NFS4ERR_EXPIRED:
3685 if (state != NULL)
3686 nfs4_schedule_stateid_recovery(server, state);
3687 case -NFS4ERR_STALE_STATEID:
3688 case -NFS4ERR_STALE_CLIENTID:
3689 nfs4_schedule_lease_recovery(clp);
3690 goto wait_on_recovery;
3691#if defined(CONFIG_NFS_V4_1)
3692 case -NFS4ERR_BADSESSION:
3693 case -NFS4ERR_BADSLOT:
3694 case -NFS4ERR_BAD_HIGH_SLOT:
3695 case -NFS4ERR_DEADSESSION:
3696 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3697 case -NFS4ERR_SEQ_FALSE_RETRY:
3698 case -NFS4ERR_SEQ_MISORDERED:
3699 dprintk("%s ERROR %d, Reset session\n", __func__,
3700 task->tk_status);
3701 nfs4_schedule_session_recovery(clp->cl_session);
3702 task->tk_status = 0;
3703 return -EAGAIN;
3704#endif /* CONFIG_NFS_V4_1 */
3705 case -NFS4ERR_DELAY:
3706 nfs_inc_server_stats(server, NFSIOS_DELAY);
3707 case -NFS4ERR_GRACE:
3708 case -EKEYEXPIRED:
3709 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3710 task->tk_status = 0;
3711 return -EAGAIN;
3712 case -NFS4ERR_RETRY_UNCACHED_REP:
3713 case -NFS4ERR_OLD_STATEID:
3714 task->tk_status = 0;
3715 return -EAGAIN;
3716 }
3717 task->tk_status = nfs4_map_errors(task->tk_status);
3718 return 0;
3719wait_on_recovery:
3720 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3721 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3722 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3723 task->tk_status = 0;
3724 return -EAGAIN;
3725}
3726
3727int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3728 unsigned short port, struct rpc_cred *cred,
3729 struct nfs4_setclientid_res *res)
3730{
3731 nfs4_verifier sc_verifier;
3732 struct nfs4_setclientid setclientid = {
3733 .sc_verifier = &sc_verifier,
3734 .sc_prog = program,
3735 .sc_cb_ident = clp->cl_cb_ident,
3736 };
3737 struct rpc_message msg = {
3738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3739 .rpc_argp = &setclientid,
3740 .rpc_resp = res,
3741 .rpc_cred = cred,
3742 };
3743 __be32 *p;
3744 int loop = 0;
3745 int status;
3746
3747 p = (__be32*)sc_verifier.data;
3748 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3749 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3750
3751 for(;;) {
3752 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3753 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3754 clp->cl_ipaddr,
3755 rpc_peeraddr2str(clp->cl_rpcclient,
3756 RPC_DISPLAY_ADDR),
3757 rpc_peeraddr2str(clp->cl_rpcclient,
3758 RPC_DISPLAY_PROTO),
3759 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3760 clp->cl_id_uniquifier);
3761 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3762 sizeof(setclientid.sc_netid),
3763 rpc_peeraddr2str(clp->cl_rpcclient,
3764 RPC_DISPLAY_NETID));
3765 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3766 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3767 clp->cl_ipaddr, port >> 8, port & 255);
3768
3769 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3770 if (status != -NFS4ERR_CLID_INUSE)
3771 break;
3772 if (loop != 0) {
3773 ++clp->cl_id_uniquifier;
3774 break;
3775 }
3776 ++loop;
3777 ssleep(clp->cl_lease_time / HZ + 1);
3778 }
3779 return status;
3780}
3781
3782int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3783 struct nfs4_setclientid_res *arg,
3784 struct rpc_cred *cred)
3785{
3786 struct nfs_fsinfo fsinfo;
3787 struct rpc_message msg = {
3788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3789 .rpc_argp = arg,
3790 .rpc_resp = &fsinfo,
3791 .rpc_cred = cred,
3792 };
3793 unsigned long now;
3794 int status;
3795
3796 now = jiffies;
3797 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3798 if (status == 0) {
3799 spin_lock(&clp->cl_lock);
3800 clp->cl_lease_time = fsinfo.lease_time * HZ;
3801 clp->cl_last_renewal = now;
3802 spin_unlock(&clp->cl_lock);
3803 }
3804 return status;
3805}
3806
3807struct nfs4_delegreturndata {
3808 struct nfs4_delegreturnargs args;
3809 struct nfs4_delegreturnres res;
3810 struct nfs_fh fh;
3811 nfs4_stateid stateid;
3812 unsigned long timestamp;
3813 struct nfs_fattr fattr;
3814 int rpc_status;
3815};
3816
3817static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3818{
3819 struct nfs4_delegreturndata *data = calldata;
3820
3821 if (!nfs4_sequence_done(task, &data->res.seq_res))
3822 return;
3823
3824 switch (task->tk_status) {
3825 case -NFS4ERR_STALE_STATEID:
3826 case -NFS4ERR_EXPIRED:
3827 case 0:
3828 renew_lease(data->res.server, data->timestamp);
3829 break;
3830 default:
3831 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3832 -EAGAIN) {
3833 nfs_restart_rpc(task, data->res.server->nfs_client);
3834 return;
3835 }
3836 }
3837 data->rpc_status = task->tk_status;
3838}
3839
3840static void nfs4_delegreturn_release(void *calldata)
3841{
3842 kfree(calldata);
3843}
3844
3845#if defined(CONFIG_NFS_V4_1)
3846static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3847{
3848 struct nfs4_delegreturndata *d_data;
3849
3850 d_data = (struct nfs4_delegreturndata *)data;
3851
3852 if (nfs4_setup_sequence(d_data->res.server,
3853 &d_data->args.seq_args,
3854 &d_data->res.seq_res, 1, task))
3855 return;
3856 rpc_call_start(task);
3857}
3858#endif /* CONFIG_NFS_V4_1 */
3859
3860static const struct rpc_call_ops nfs4_delegreturn_ops = {
3861#if defined(CONFIG_NFS_V4_1)
3862 .rpc_call_prepare = nfs4_delegreturn_prepare,
3863#endif /* CONFIG_NFS_V4_1 */
3864 .rpc_call_done = nfs4_delegreturn_done,
3865 .rpc_release = nfs4_delegreturn_release,
3866};
3867
3868static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3869{
3870 struct nfs4_delegreturndata *data;
3871 struct nfs_server *server = NFS_SERVER(inode);
3872 struct rpc_task *task;
3873 struct rpc_message msg = {
3874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3875 .rpc_cred = cred,
3876 };
3877 struct rpc_task_setup task_setup_data = {
3878 .rpc_client = server->client,
3879 .rpc_message = &msg,
3880 .callback_ops = &nfs4_delegreturn_ops,
3881 .flags = RPC_TASK_ASYNC,
3882 };
3883 int status = 0;
3884
3885 data = kzalloc(sizeof(*data), GFP_NOFS);
3886 if (data == NULL)
3887 return -ENOMEM;
3888 data->args.fhandle = &data->fh;
3889 data->args.stateid = &data->stateid;
3890 data->args.bitmask = server->attr_bitmask;
3891 nfs_copy_fh(&data->fh, NFS_FH(inode));
3892 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3893 data->res.fattr = &data->fattr;
3894 data->res.server = server;
3895 nfs_fattr_init(data->res.fattr);
3896 data->timestamp = jiffies;
3897 data->rpc_status = 0;
3898
3899 task_setup_data.callback_data = data;
3900 msg.rpc_argp = &data->args;
3901 msg.rpc_resp = &data->res;
3902 task = rpc_run_task(&task_setup_data);
3903 if (IS_ERR(task))
3904 return PTR_ERR(task);
3905 if (!issync)
3906 goto out;
3907 status = nfs4_wait_for_completion_rpc_task(task);
3908 if (status != 0)
3909 goto out;
3910 status = data->rpc_status;
3911 if (status != 0)
3912 goto out;
3913 nfs_refresh_inode(inode, &data->fattr);
3914out:
3915 rpc_put_task(task);
3916 return status;
3917}
3918
3919int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3920{
3921 struct nfs_server *server = NFS_SERVER(inode);
3922 struct nfs4_exception exception = { };
3923 int err;
3924 do {
3925 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3926 switch (err) {
3927 case -NFS4ERR_STALE_STATEID:
3928 case -NFS4ERR_EXPIRED:
3929 case 0:
3930 return 0;
3931 }
3932 err = nfs4_handle_exception(server, err, &exception);
3933 } while (exception.retry);
3934 return err;
3935}
3936
3937#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3938#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3939
3940/*
3941 * sleep, with exponential backoff, and retry the LOCK operation.
3942 */
3943static unsigned long
3944nfs4_set_lock_task_retry(unsigned long timeout)
3945{
3946 schedule_timeout_killable(timeout);
3947 timeout <<= 1;
3948 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3949 return NFS4_LOCK_MAXTIMEOUT;
3950 return timeout;
3951}
3952
3953static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3954{
3955 struct inode *inode = state->inode;
3956 struct nfs_server *server = NFS_SERVER(inode);
3957 struct nfs_client *clp = server->nfs_client;
3958 struct nfs_lockt_args arg = {
3959 .fh = NFS_FH(inode),
3960 .fl = request,
3961 };
3962 struct nfs_lockt_res res = {
3963 .denied = request,
3964 };
3965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3967 .rpc_argp = &arg,
3968 .rpc_resp = &res,
3969 .rpc_cred = state->owner->so_cred,
3970 };
3971 struct nfs4_lock_state *lsp;
3972 int status;
3973
3974 arg.lock_owner.clientid = clp->cl_clientid;
3975 status = nfs4_set_lock_state(state, request);
3976 if (status != 0)
3977 goto out;
3978 lsp = request->fl_u.nfs4_fl.owner;
3979 arg.lock_owner.id = lsp->ls_id.id;
3980 arg.lock_owner.s_dev = server->s_dev;
3981 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3982 switch (status) {
3983 case 0:
3984 request->fl_type = F_UNLCK;
3985 break;
3986 case -NFS4ERR_DENIED:
3987 status = 0;
3988 }
3989 request->fl_ops->fl_release_private(request);
3990out:
3991 return status;
3992}
3993
3994static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3995{
3996 struct nfs4_exception exception = { };
3997 int err;
3998
3999 do {
4000 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4001 _nfs4_proc_getlk(state, cmd, request),
4002 &exception);
4003 } while (exception.retry);
4004 return err;
4005}
4006
4007static int do_vfs_lock(struct file *file, struct file_lock *fl)
4008{
4009 int res = 0;
4010 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4011 case FL_POSIX:
4012 res = posix_lock_file_wait(file, fl);
4013 break;
4014 case FL_FLOCK:
4015 res = flock_lock_file_wait(file, fl);
4016 break;
4017 default:
4018 BUG();
4019 }
4020 return res;
4021}
4022
4023struct nfs4_unlockdata {
4024 struct nfs_locku_args arg;
4025 struct nfs_locku_res res;
4026 struct nfs4_lock_state *lsp;
4027 struct nfs_open_context *ctx;
4028 struct file_lock fl;
4029 const struct nfs_server *server;
4030 unsigned long timestamp;
4031};
4032
4033static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4034 struct nfs_open_context *ctx,
4035 struct nfs4_lock_state *lsp,
4036 struct nfs_seqid *seqid)
4037{
4038 struct nfs4_unlockdata *p;
4039 struct inode *inode = lsp->ls_state->inode;
4040
4041 p = kzalloc(sizeof(*p), GFP_NOFS);
4042 if (p == NULL)
4043 return NULL;
4044 p->arg.fh = NFS_FH(inode);
4045 p->arg.fl = &p->fl;
4046 p->arg.seqid = seqid;
4047 p->res.seqid = seqid;
4048 p->arg.stateid = &lsp->ls_stateid;
4049 p->lsp = lsp;
4050 atomic_inc(&lsp->ls_count);
4051 /* Ensure we don't close file until we're done freeing locks! */
4052 p->ctx = get_nfs_open_context(ctx);
4053 memcpy(&p->fl, fl, sizeof(p->fl));
4054 p->server = NFS_SERVER(inode);
4055 return p;
4056}
4057
4058static void nfs4_locku_release_calldata(void *data)
4059{
4060 struct nfs4_unlockdata *calldata = data;
4061 nfs_free_seqid(calldata->arg.seqid);
4062 nfs4_put_lock_state(calldata->lsp);
4063 put_nfs_open_context(calldata->ctx);
4064 kfree(calldata);
4065}
4066
4067static void nfs4_locku_done(struct rpc_task *task, void *data)
4068{
4069 struct nfs4_unlockdata *calldata = data;
4070
4071 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4072 return;
4073 switch (task->tk_status) {
4074 case 0:
4075 memcpy(calldata->lsp->ls_stateid.data,
4076 calldata->res.stateid.data,
4077 sizeof(calldata->lsp->ls_stateid.data));
4078 renew_lease(calldata->server, calldata->timestamp);
4079 break;
4080 case -NFS4ERR_BAD_STATEID:
4081 case -NFS4ERR_OLD_STATEID:
4082 case -NFS4ERR_STALE_STATEID:
4083 case -NFS4ERR_EXPIRED:
4084 break;
4085 default:
4086 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4087 nfs_restart_rpc(task,
4088 calldata->server->nfs_client);
4089 }
4090}
4091
4092static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4093{
4094 struct nfs4_unlockdata *calldata = data;
4095
4096 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4097 return;
4098 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4099 /* Note: exit _without_ running nfs4_locku_done */
4100 task->tk_action = NULL;
4101 return;
4102 }
4103 calldata->timestamp = jiffies;
4104 if (nfs4_setup_sequence(calldata->server,
4105 &calldata->arg.seq_args,
4106 &calldata->res.seq_res, 1, task))
4107 return;
4108 rpc_call_start(task);
4109}
4110
4111static const struct rpc_call_ops nfs4_locku_ops = {
4112 .rpc_call_prepare = nfs4_locku_prepare,
4113 .rpc_call_done = nfs4_locku_done,
4114 .rpc_release = nfs4_locku_release_calldata,
4115};
4116
4117static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4118 struct nfs_open_context *ctx,
4119 struct nfs4_lock_state *lsp,
4120 struct nfs_seqid *seqid)
4121{
4122 struct nfs4_unlockdata *data;
4123 struct rpc_message msg = {
4124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4125 .rpc_cred = ctx->cred,
4126 };
4127 struct rpc_task_setup task_setup_data = {
4128 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4129 .rpc_message = &msg,
4130 .callback_ops = &nfs4_locku_ops,
4131 .workqueue = nfsiod_workqueue,
4132 .flags = RPC_TASK_ASYNC,
4133 };
4134
4135 /* Ensure this is an unlock - when canceling a lock, the
4136 * canceled lock is passed in, and it won't be an unlock.
4137 */
4138 fl->fl_type = F_UNLCK;
4139
4140 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4141 if (data == NULL) {
4142 nfs_free_seqid(seqid);
4143 return ERR_PTR(-ENOMEM);
4144 }
4145
4146 msg.rpc_argp = &data->arg;
4147 msg.rpc_resp = &data->res;
4148 task_setup_data.callback_data = data;
4149 return rpc_run_task(&task_setup_data);
4150}
4151
4152static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4153{
4154 struct nfs_inode *nfsi = NFS_I(state->inode);
4155 struct nfs_seqid *seqid;
4156 struct nfs4_lock_state *lsp;
4157 struct rpc_task *task;
4158 int status = 0;
4159 unsigned char fl_flags = request->fl_flags;
4160
4161 status = nfs4_set_lock_state(state, request);
4162 /* Unlock _before_ we do the RPC call */
4163 request->fl_flags |= FL_EXISTS;
4164 down_read(&nfsi->rwsem);
4165 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4166 up_read(&nfsi->rwsem);
4167 goto out;
4168 }
4169 up_read(&nfsi->rwsem);
4170 if (status != 0)
4171 goto out;
4172 /* Is this a delegated lock? */
4173 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4174 goto out;
4175 lsp = request->fl_u.nfs4_fl.owner;
4176 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4177 status = -ENOMEM;
4178 if (seqid == NULL)
4179 goto out;
4180 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4181 status = PTR_ERR(task);
4182 if (IS_ERR(task))
4183 goto out;
4184 status = nfs4_wait_for_completion_rpc_task(task);
4185 rpc_put_task(task);
4186out:
4187 request->fl_flags = fl_flags;
4188 return status;
4189}
4190
4191struct nfs4_lockdata {
4192 struct nfs_lock_args arg;
4193 struct nfs_lock_res res;
4194 struct nfs4_lock_state *lsp;
4195 struct nfs_open_context *ctx;
4196 struct file_lock fl;
4197 unsigned long timestamp;
4198 int rpc_status;
4199 int cancelled;
4200 struct nfs_server *server;
4201};
4202
4203static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4204 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4205 gfp_t gfp_mask)
4206{
4207 struct nfs4_lockdata *p;
4208 struct inode *inode = lsp->ls_state->inode;
4209 struct nfs_server *server = NFS_SERVER(inode);
4210
4211 p = kzalloc(sizeof(*p), gfp_mask);
4212 if (p == NULL)
4213 return NULL;
4214
4215 p->arg.fh = NFS_FH(inode);
4216 p->arg.fl = &p->fl;
4217 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4218 if (p->arg.open_seqid == NULL)
4219 goto out_free;
4220 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4221 if (p->arg.lock_seqid == NULL)
4222 goto out_free_seqid;
4223 p->arg.lock_stateid = &lsp->ls_stateid;
4224 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4225 p->arg.lock_owner.id = lsp->ls_id.id;
4226 p->arg.lock_owner.s_dev = server->s_dev;
4227 p->res.lock_seqid = p->arg.lock_seqid;
4228 p->lsp = lsp;
4229 p->server = server;
4230 atomic_inc(&lsp->ls_count);
4231 p->ctx = get_nfs_open_context(ctx);
4232 memcpy(&p->fl, fl, sizeof(p->fl));
4233 return p;
4234out_free_seqid:
4235 nfs_free_seqid(p->arg.open_seqid);
4236out_free:
4237 kfree(p);
4238 return NULL;
4239}
4240
4241static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4242{
4243 struct nfs4_lockdata *data = calldata;
4244 struct nfs4_state *state = data->lsp->ls_state;
4245
4246 dprintk("%s: begin!\n", __func__);
4247 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4248 return;
4249 /* Do we need to do an open_to_lock_owner? */
4250 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4251 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4252 return;
4253 data->arg.open_stateid = &state->stateid;
4254 data->arg.new_lock_owner = 1;
4255 data->res.open_seqid = data->arg.open_seqid;
4256 } else
4257 data->arg.new_lock_owner = 0;
4258 data->timestamp = jiffies;
4259 if (nfs4_setup_sequence(data->server,
4260 &data->arg.seq_args,
4261 &data->res.seq_res, 1, task))
4262 return;
4263 rpc_call_start(task);
4264 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4265}
4266
4267static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4268{
4269 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4270 nfs4_lock_prepare(task, calldata);
4271}
4272
4273static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4274{
4275 struct nfs4_lockdata *data = calldata;
4276
4277 dprintk("%s: begin!\n", __func__);
4278
4279 if (!nfs4_sequence_done(task, &data->res.seq_res))
4280 return;
4281
4282 data->rpc_status = task->tk_status;
4283 if (data->arg.new_lock_owner != 0) {
4284 if (data->rpc_status == 0)
4285 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4286 else
4287 goto out;
4288 }
4289 if (data->rpc_status == 0) {
4290 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4291 sizeof(data->lsp->ls_stateid.data));
4292 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4293 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4294 }
4295out:
4296 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4297}
4298
4299static void nfs4_lock_release(void *calldata)
4300{
4301 struct nfs4_lockdata *data = calldata;
4302
4303 dprintk("%s: begin!\n", __func__);
4304 nfs_free_seqid(data->arg.open_seqid);
4305 if (data->cancelled != 0) {
4306 struct rpc_task *task;
4307 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4308 data->arg.lock_seqid);
4309 if (!IS_ERR(task))
4310 rpc_put_task_async(task);
4311 dprintk("%s: cancelling lock!\n", __func__);
4312 } else
4313 nfs_free_seqid(data->arg.lock_seqid);
4314 nfs4_put_lock_state(data->lsp);
4315 put_nfs_open_context(data->ctx);
4316 kfree(data);
4317 dprintk("%s: done!\n", __func__);
4318}
4319
4320static const struct rpc_call_ops nfs4_lock_ops = {
4321 .rpc_call_prepare = nfs4_lock_prepare,
4322 .rpc_call_done = nfs4_lock_done,
4323 .rpc_release = nfs4_lock_release,
4324};
4325
4326static const struct rpc_call_ops nfs4_recover_lock_ops = {
4327 .rpc_call_prepare = nfs4_recover_lock_prepare,
4328 .rpc_call_done = nfs4_lock_done,
4329 .rpc_release = nfs4_lock_release,
4330};
4331
4332static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4333{
4334 switch (error) {
4335 case -NFS4ERR_ADMIN_REVOKED:
4336 case -NFS4ERR_BAD_STATEID:
4337 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4338 if (new_lock_owner != 0 ||
4339 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4340 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4341 break;
4342 case -NFS4ERR_STALE_STATEID:
4343 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4344 case -NFS4ERR_EXPIRED:
4345 nfs4_schedule_lease_recovery(server->nfs_client);
4346 };
4347}
4348
4349static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4350{
4351 struct nfs4_lockdata *data;
4352 struct rpc_task *task;
4353 struct rpc_message msg = {
4354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4355 .rpc_cred = state->owner->so_cred,
4356 };
4357 struct rpc_task_setup task_setup_data = {
4358 .rpc_client = NFS_CLIENT(state->inode),
4359 .rpc_message = &msg,
4360 .callback_ops = &nfs4_lock_ops,
4361 .workqueue = nfsiod_workqueue,
4362 .flags = RPC_TASK_ASYNC,
4363 };
4364 int ret;
4365
4366 dprintk("%s: begin!\n", __func__);
4367 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4368 fl->fl_u.nfs4_fl.owner,
4369 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4370 if (data == NULL)
4371 return -ENOMEM;
4372 if (IS_SETLKW(cmd))
4373 data->arg.block = 1;
4374 if (recovery_type > NFS_LOCK_NEW) {
4375 if (recovery_type == NFS_LOCK_RECLAIM)
4376 data->arg.reclaim = NFS_LOCK_RECLAIM;
4377 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4378 }
4379 msg.rpc_argp = &data->arg;
4380 msg.rpc_resp = &data->res;
4381 task_setup_data.callback_data = data;
4382 task = rpc_run_task(&task_setup_data);
4383 if (IS_ERR(task))
4384 return PTR_ERR(task);
4385 ret = nfs4_wait_for_completion_rpc_task(task);
4386 if (ret == 0) {
4387 ret = data->rpc_status;
4388 if (ret)
4389 nfs4_handle_setlk_error(data->server, data->lsp,
4390 data->arg.new_lock_owner, ret);
4391 } else
4392 data->cancelled = 1;
4393 rpc_put_task(task);
4394 dprintk("%s: done, ret = %d!\n", __func__, ret);
4395 return ret;
4396}
4397
4398static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4399{
4400 struct nfs_server *server = NFS_SERVER(state->inode);
4401 struct nfs4_exception exception = { };
4402 int err;
4403
4404 do {
4405 /* Cache the lock if possible... */
4406 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4407 return 0;
4408 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4409 if (err != -NFS4ERR_DELAY)
4410 break;
4411 nfs4_handle_exception(server, err, &exception);
4412 } while (exception.retry);
4413 return err;
4414}
4415
4416static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4417{
4418 struct nfs_server *server = NFS_SERVER(state->inode);
4419 struct nfs4_exception exception = { };
4420 int err;
4421
4422 err = nfs4_set_lock_state(state, request);
4423 if (err != 0)
4424 return err;
4425 do {
4426 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4427 return 0;
4428 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4429 switch (err) {
4430 default:
4431 goto out;
4432 case -NFS4ERR_GRACE:
4433 case -NFS4ERR_DELAY:
4434 nfs4_handle_exception(server, err, &exception);
4435 err = 0;
4436 }
4437 } while (exception.retry);
4438out:
4439 return err;
4440}
4441
4442#if defined(CONFIG_NFS_V4_1)
4443static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4444{
4445 int status;
4446 struct nfs_server *server = NFS_SERVER(state->inode);
4447
4448 status = nfs41_test_stateid(server, state);
4449 if (status == NFS_OK)
4450 return 0;
4451 nfs41_free_stateid(server, state);
4452 return nfs4_lock_expired(state, request);
4453}
4454#endif
4455
4456static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4457{
4458 struct nfs_inode *nfsi = NFS_I(state->inode);
4459 unsigned char fl_flags = request->fl_flags;
4460 int status = -ENOLCK;
4461
4462 if ((fl_flags & FL_POSIX) &&
4463 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4464 goto out;
4465 /* Is this a delegated open? */
4466 status = nfs4_set_lock_state(state, request);
4467 if (status != 0)
4468 goto out;
4469 request->fl_flags |= FL_ACCESS;
4470 status = do_vfs_lock(request->fl_file, request);
4471 if (status < 0)
4472 goto out;
4473 down_read(&nfsi->rwsem);
4474 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4475 /* Yes: cache locks! */
4476 /* ...but avoid races with delegation recall... */
4477 request->fl_flags = fl_flags & ~FL_SLEEP;
4478 status = do_vfs_lock(request->fl_file, request);
4479 goto out_unlock;
4480 }
4481 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4482 if (status != 0)
4483 goto out_unlock;
4484 /* Note: we always want to sleep here! */
4485 request->fl_flags = fl_flags | FL_SLEEP;
4486 if (do_vfs_lock(request->fl_file, request) < 0)
4487 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4488out_unlock:
4489 up_read(&nfsi->rwsem);
4490out:
4491 request->fl_flags = fl_flags;
4492 return status;
4493}
4494
4495static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4496{
4497 struct nfs4_exception exception = { };
4498 int err;
4499
4500 do {
4501 err = _nfs4_proc_setlk(state, cmd, request);
4502 if (err == -NFS4ERR_DENIED)
4503 err = -EAGAIN;
4504 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4505 err, &exception);
4506 } while (exception.retry);
4507 return err;
4508}
4509
4510static int
4511nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4512{
4513 struct nfs_open_context *ctx;
4514 struct nfs4_state *state;
4515 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4516 int status;
4517
4518 /* verify open state */
4519 ctx = nfs_file_open_context(filp);
4520 state = ctx->state;
4521
4522 if (request->fl_start < 0 || request->fl_end < 0)
4523 return -EINVAL;
4524
4525 if (IS_GETLK(cmd)) {
4526 if (state != NULL)
4527 return nfs4_proc_getlk(state, F_GETLK, request);
4528 return 0;
4529 }
4530
4531 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4532 return -EINVAL;
4533
4534 if (request->fl_type == F_UNLCK) {
4535 if (state != NULL)
4536 return nfs4_proc_unlck(state, cmd, request);
4537 return 0;
4538 }
4539
4540 if (state == NULL)
4541 return -ENOLCK;
4542 do {
4543 status = nfs4_proc_setlk(state, cmd, request);
4544 if ((status != -EAGAIN) || IS_SETLK(cmd))
4545 break;
4546 timeout = nfs4_set_lock_task_retry(timeout);
4547 status = -ERESTARTSYS;
4548 if (signalled())
4549 break;
4550 } while(status < 0);
4551 return status;
4552}
4553
4554int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4555{
4556 struct nfs_server *server = NFS_SERVER(state->inode);
4557 struct nfs4_exception exception = { };
4558 int err;
4559
4560 err = nfs4_set_lock_state(state, fl);
4561 if (err != 0)
4562 goto out;
4563 do {
4564 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4565 switch (err) {
4566 default:
4567 printk(KERN_ERR "%s: unhandled error %d.\n",
4568 __func__, err);
4569 case 0:
4570 case -ESTALE:
4571 goto out;
4572 case -NFS4ERR_EXPIRED:
4573 nfs4_schedule_stateid_recovery(server, state);
4574 case -NFS4ERR_STALE_CLIENTID:
4575 case -NFS4ERR_STALE_STATEID:
4576 nfs4_schedule_lease_recovery(server->nfs_client);
4577 goto out;
4578 case -NFS4ERR_BADSESSION:
4579 case -NFS4ERR_BADSLOT:
4580 case -NFS4ERR_BAD_HIGH_SLOT:
4581 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4582 case -NFS4ERR_DEADSESSION:
4583 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4584 goto out;
4585 case -ERESTARTSYS:
4586 /*
4587 * The show must go on: exit, but mark the
4588 * stateid as needing recovery.
4589 */
4590 case -NFS4ERR_ADMIN_REVOKED:
4591 case -NFS4ERR_BAD_STATEID:
4592 case -NFS4ERR_OPENMODE:
4593 nfs4_schedule_stateid_recovery(server, state);
4594 err = 0;
4595 goto out;
4596 case -EKEYEXPIRED:
4597 /*
4598 * User RPCSEC_GSS context has expired.
4599 * We cannot recover this stateid now, so
4600 * skip it and allow recovery thread to
4601 * proceed.
4602 */
4603 err = 0;
4604 goto out;
4605 case -ENOMEM:
4606 case -NFS4ERR_DENIED:
4607 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4608 err = 0;
4609 goto out;
4610 case -NFS4ERR_DELAY:
4611 break;
4612 }
4613 err = nfs4_handle_exception(server, err, &exception);
4614 } while (exception.retry);
4615out:
4616 return err;
4617}
4618
4619static void nfs4_release_lockowner_release(void *calldata)
4620{
4621 kfree(calldata);
4622}
4623
4624const struct rpc_call_ops nfs4_release_lockowner_ops = {
4625 .rpc_release = nfs4_release_lockowner_release,
4626};
4627
4628void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4629{
4630 struct nfs_server *server = lsp->ls_state->owner->so_server;
4631 struct nfs_release_lockowner_args *args;
4632 struct rpc_message msg = {
4633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4634 };
4635
4636 if (server->nfs_client->cl_mvops->minor_version != 0)
4637 return;
4638 args = kmalloc(sizeof(*args), GFP_NOFS);
4639 if (!args)
4640 return;
4641 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4642 args->lock_owner.id = lsp->ls_id.id;
4643 args->lock_owner.s_dev = server->s_dev;
4644 msg.rpc_argp = args;
4645 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4646}
4647
4648#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4649
4650static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4651 const void *buf, size_t buflen,
4652 int flags, int type)
4653{
4654 if (strcmp(key, "") != 0)
4655 return -EINVAL;
4656
4657 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4658}
4659
4660static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4661 void *buf, size_t buflen, int type)
4662{
4663 if (strcmp(key, "") != 0)
4664 return -EINVAL;
4665
4666 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4667}
4668
4669static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4670 size_t list_len, const char *name,
4671 size_t name_len, int type)
4672{
4673 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4674
4675 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4676 return 0;
4677
4678 if (list && len <= list_len)
4679 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4680 return len;
4681}
4682
4683/*
4684 * nfs_fhget will use either the mounted_on_fileid or the fileid
4685 */
4686static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4687{
4688 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4689 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4690 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4691 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4692 return;
4693
4694 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4695 NFS_ATTR_FATTR_NLINK;
4696 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4697 fattr->nlink = 2;
4698}
4699
4700int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4701 struct nfs4_fs_locations *fs_locations, struct page *page)
4702{
4703 struct nfs_server *server = NFS_SERVER(dir);
4704 u32 bitmask[2] = {
4705 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4706 };
4707 struct nfs4_fs_locations_arg args = {
4708 .dir_fh = NFS_FH(dir),
4709 .name = name,
4710 .page = page,
4711 .bitmask = bitmask,
4712 };
4713 struct nfs4_fs_locations_res res = {
4714 .fs_locations = fs_locations,
4715 };
4716 struct rpc_message msg = {
4717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4718 .rpc_argp = &args,
4719 .rpc_resp = &res,
4720 };
4721 int status;
4722
4723 dprintk("%s: start\n", __func__);
4724
4725 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4726 * is not supported */
4727 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4728 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4729 else
4730 bitmask[0] |= FATTR4_WORD0_FILEID;
4731
4732 nfs_fattr_init(&fs_locations->fattr);
4733 fs_locations->server = server;
4734 fs_locations->nlocations = 0;
4735 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4736 dprintk("%s: returned status = %d\n", __func__, status);
4737 return status;
4738}
4739
4740static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4741{
4742 int status;
4743 struct nfs4_secinfo_arg args = {
4744 .dir_fh = NFS_FH(dir),
4745 .name = name,
4746 };
4747 struct nfs4_secinfo_res res = {
4748 .flavors = flavors,
4749 };
4750 struct rpc_message msg = {
4751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4752 .rpc_argp = &args,
4753 .rpc_resp = &res,
4754 };
4755
4756 dprintk("NFS call secinfo %s\n", name->name);
4757 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4758 dprintk("NFS reply secinfo: %d\n", status);
4759 return status;
4760}
4761
4762int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4763{
4764 struct nfs4_exception exception = { };
4765 int err;
4766 do {
4767 err = nfs4_handle_exception(NFS_SERVER(dir),
4768 _nfs4_proc_secinfo(dir, name, flavors),
4769 &exception);
4770 } while (exception.retry);
4771 return err;
4772}
4773
4774#ifdef CONFIG_NFS_V4_1
4775/*
4776 * Check the exchange flags returned by the server for invalid flags, having
4777 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4778 * DS flags set.
4779 */
4780static int nfs4_check_cl_exchange_flags(u32 flags)
4781{
4782 if (flags & ~EXCHGID4_FLAG_MASK_R)
4783 goto out_inval;
4784 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4785 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4786 goto out_inval;
4787 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4788 goto out_inval;
4789 return NFS_OK;
4790out_inval:
4791 return -NFS4ERR_INVAL;
4792}
4793
4794static bool
4795nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4796{
4797 if (a->server_scope_sz == b->server_scope_sz &&
4798 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4799 return true;
4800
4801 return false;
4802}
4803
4804/*
4805 * nfs4_proc_exchange_id()
4806 *
4807 * Since the clientid has expired, all compounds using sessions
4808 * associated with the stale clientid will be returning
4809 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4810 * be in some phase of session reset.
4811 */
4812int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4813{
4814 nfs4_verifier verifier;
4815 struct nfs41_exchange_id_args args = {
4816 .client = clp,
4817 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4818 };
4819 struct nfs41_exchange_id_res res = {
4820 .client = clp,
4821 };
4822 int status;
4823 struct rpc_message msg = {
4824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4825 .rpc_argp = &args,
4826 .rpc_resp = &res,
4827 .rpc_cred = cred,
4828 };
4829 __be32 *p;
4830
4831 dprintk("--> %s\n", __func__);
4832 BUG_ON(clp == NULL);
4833
4834 p = (u32 *)verifier.data;
4835 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4836 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4837 args.verifier = &verifier;
4838
4839 args.id_len = scnprintf(args.id, sizeof(args.id),
4840 "%s/%s.%s/%u",
4841 clp->cl_ipaddr,
4842 init_utsname()->nodename,
4843 init_utsname()->domainname,
4844 clp->cl_rpcclient->cl_auth->au_flavor);
4845
4846 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4847 if (unlikely(!res.server_scope))
4848 return -ENOMEM;
4849
4850 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4851 if (!status)
4852 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4853
4854 if (!status) {
4855 if (clp->server_scope &&
4856 !nfs41_same_server_scope(clp->server_scope,
4857 res.server_scope)) {
4858 dprintk("%s: server_scope mismatch detected\n",
4859 __func__);
4860 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4861 kfree(clp->server_scope);
4862 clp->server_scope = NULL;
4863 }
4864
4865 if (!clp->server_scope)
4866 clp->server_scope = res.server_scope;
4867 else
4868 kfree(res.server_scope);
4869 }
4870
4871 dprintk("<-- %s status= %d\n", __func__, status);
4872 return status;
4873}
4874
4875struct nfs4_get_lease_time_data {
4876 struct nfs4_get_lease_time_args *args;
4877 struct nfs4_get_lease_time_res *res;
4878 struct nfs_client *clp;
4879};
4880
4881static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4882 void *calldata)
4883{
4884 int ret;
4885 struct nfs4_get_lease_time_data *data =
4886 (struct nfs4_get_lease_time_data *)calldata;
4887
4888 dprintk("--> %s\n", __func__);
4889 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4890 /* just setup sequence, do not trigger session recovery
4891 since we're invoked within one */
4892 ret = nfs41_setup_sequence(data->clp->cl_session,
4893 &data->args->la_seq_args,
4894 &data->res->lr_seq_res, 0, task);
4895
4896 BUG_ON(ret == -EAGAIN);
4897 rpc_call_start(task);
4898 dprintk("<-- %s\n", __func__);
4899}
4900
4901/*
4902 * Called from nfs4_state_manager thread for session setup, so don't recover
4903 * from sequence operation or clientid errors.
4904 */
4905static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4906{
4907 struct nfs4_get_lease_time_data *data =
4908 (struct nfs4_get_lease_time_data *)calldata;
4909
4910 dprintk("--> %s\n", __func__);
4911 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4912 return;
4913 switch (task->tk_status) {
4914 case -NFS4ERR_DELAY:
4915 case -NFS4ERR_GRACE:
4916 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4917 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4918 task->tk_status = 0;
4919 /* fall through */
4920 case -NFS4ERR_RETRY_UNCACHED_REP:
4921 nfs_restart_rpc(task, data->clp);
4922 return;
4923 }
4924 dprintk("<-- %s\n", __func__);
4925}
4926
4927struct rpc_call_ops nfs4_get_lease_time_ops = {
4928 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4929 .rpc_call_done = nfs4_get_lease_time_done,
4930};
4931
4932int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4933{
4934 struct rpc_task *task;
4935 struct nfs4_get_lease_time_args args;
4936 struct nfs4_get_lease_time_res res = {
4937 .lr_fsinfo = fsinfo,
4938 };
4939 struct nfs4_get_lease_time_data data = {
4940 .args = &args,
4941 .res = &res,
4942 .clp = clp,
4943 };
4944 struct rpc_message msg = {
4945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4946 .rpc_argp = &args,
4947 .rpc_resp = &res,
4948 };
4949 struct rpc_task_setup task_setup = {
4950 .rpc_client = clp->cl_rpcclient,
4951 .rpc_message = &msg,
4952 .callback_ops = &nfs4_get_lease_time_ops,
4953 .callback_data = &data,
4954 .flags = RPC_TASK_TIMEOUT,
4955 };
4956 int status;
4957
4958 dprintk("--> %s\n", __func__);
4959 task = rpc_run_task(&task_setup);
4960
4961 if (IS_ERR(task))
4962 status = PTR_ERR(task);
4963 else {
4964 status = task->tk_status;
4965 rpc_put_task(task);
4966 }
4967 dprintk("<-- %s return %d\n", __func__, status);
4968
4969 return status;
4970}
4971
4972/*
4973 * Reset a slot table
4974 */
4975static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4976 int ivalue)
4977{
4978 struct nfs4_slot *new = NULL;
4979 int i;
4980 int ret = 0;
4981
4982 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4983 max_reqs, tbl->max_slots);
4984
4985 /* Does the newly negotiated max_reqs match the existing slot table? */
4986 if (max_reqs != tbl->max_slots) {
4987 ret = -ENOMEM;
4988 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4989 GFP_NOFS);
4990 if (!new)
4991 goto out;
4992 ret = 0;
4993 kfree(tbl->slots);
4994 }
4995 spin_lock(&tbl->slot_tbl_lock);
4996 if (new) {
4997 tbl->slots = new;
4998 tbl->max_slots = max_reqs;
4999 }
5000 for (i = 0; i < tbl->max_slots; ++i)
5001 tbl->slots[i].seq_nr = ivalue;
5002 spin_unlock(&tbl->slot_tbl_lock);
5003 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5004 tbl, tbl->slots, tbl->max_slots);
5005out:
5006 dprintk("<-- %s: return %d\n", __func__, ret);
5007 return ret;
5008}
5009
5010/*
5011 * Reset the forechannel and backchannel slot tables
5012 */
5013static int nfs4_reset_slot_tables(struct nfs4_session *session)
5014{
5015 int status;
5016
5017 status = nfs4_reset_slot_table(&session->fc_slot_table,
5018 session->fc_attrs.max_reqs, 1);
5019 if (status)
5020 return status;
5021
5022 status = nfs4_reset_slot_table(&session->bc_slot_table,
5023 session->bc_attrs.max_reqs, 0);
5024 return status;
5025}
5026
5027/* Destroy the slot table */
5028static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5029{
5030 if (session->fc_slot_table.slots != NULL) {
5031 kfree(session->fc_slot_table.slots);
5032 session->fc_slot_table.slots = NULL;
5033 }
5034 if (session->bc_slot_table.slots != NULL) {
5035 kfree(session->bc_slot_table.slots);
5036 session->bc_slot_table.slots = NULL;
5037 }
5038 return;
5039}
5040
5041/*
5042 * Initialize slot table
5043 */
5044static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5045 int max_slots, int ivalue)
5046{
5047 struct nfs4_slot *slot;
5048 int ret = -ENOMEM;
5049
5050 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5051
5052 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5053
5054 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5055 if (!slot)
5056 goto out;
5057 ret = 0;
5058
5059 spin_lock(&tbl->slot_tbl_lock);
5060 tbl->max_slots = max_slots;
5061 tbl->slots = slot;
5062 tbl->highest_used_slotid = -1; /* no slot is currently used */
5063 spin_unlock(&tbl->slot_tbl_lock);
5064 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5065 tbl, tbl->slots, tbl->max_slots);
5066out:
5067 dprintk("<-- %s: return %d\n", __func__, ret);
5068 return ret;
5069}
5070
5071/*
5072 * Initialize the forechannel and backchannel tables
5073 */
5074static int nfs4_init_slot_tables(struct nfs4_session *session)
5075{
5076 struct nfs4_slot_table *tbl;
5077 int status = 0;
5078
5079 tbl = &session->fc_slot_table;
5080 if (tbl->slots == NULL) {
5081 status = nfs4_init_slot_table(tbl,
5082 session->fc_attrs.max_reqs, 1);
5083 if (status)
5084 return status;
5085 }
5086
5087 tbl = &session->bc_slot_table;
5088 if (tbl->slots == NULL) {
5089 status = nfs4_init_slot_table(tbl,
5090 session->bc_attrs.max_reqs, 0);
5091 if (status)
5092 nfs4_destroy_slot_tables(session);
5093 }
5094
5095 return status;
5096}
5097
5098struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5099{
5100 struct nfs4_session *session;
5101 struct nfs4_slot_table *tbl;
5102
5103 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5104 if (!session)
5105 return NULL;
5106
5107 tbl = &session->fc_slot_table;
5108 tbl->highest_used_slotid = -1;
5109 spin_lock_init(&tbl->slot_tbl_lock);
5110 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5111 init_completion(&tbl->complete);
5112
5113 tbl = &session->bc_slot_table;
5114 tbl->highest_used_slotid = -1;
5115 spin_lock_init(&tbl->slot_tbl_lock);
5116 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5117 init_completion(&tbl->complete);
5118
5119 session->session_state = 1<<NFS4_SESSION_INITING;
5120
5121 session->clp = clp;
5122 return session;
5123}
5124
5125void nfs4_destroy_session(struct nfs4_session *session)
5126{
5127 nfs4_proc_destroy_session(session);
5128 dprintk("%s Destroy backchannel for xprt %p\n",
5129 __func__, session->clp->cl_rpcclient->cl_xprt);
5130 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5131 NFS41_BC_MIN_CALLBACKS);
5132 nfs4_destroy_slot_tables(session);
5133 kfree(session);
5134}
5135
5136/*
5137 * Initialize the values to be used by the client in CREATE_SESSION
5138 * If nfs4_init_session set the fore channel request and response sizes,
5139 * use them.
5140 *
5141 * Set the back channel max_resp_sz_cached to zero to force the client to
5142 * always set csa_cachethis to FALSE because the current implementation
5143 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5144 */
5145static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5146{
5147 struct nfs4_session *session = args->client->cl_session;
5148 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5149 mxresp_sz = session->fc_attrs.max_resp_sz;
5150
5151 if (mxrqst_sz == 0)
5152 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5153 if (mxresp_sz == 0)
5154 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5155 /* Fore channel attributes */
5156 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5157 args->fc_attrs.max_resp_sz = mxresp_sz;
5158 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5159 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5160
5161 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5162 "max_ops=%u max_reqs=%u\n",
5163 __func__,
5164 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5165 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5166
5167 /* Back channel attributes */
5168 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5169 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5170 args->bc_attrs.max_resp_sz_cached = 0;
5171 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5172 args->bc_attrs.max_reqs = 1;
5173
5174 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5175 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5176 __func__,
5177 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5178 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5179 args->bc_attrs.max_reqs);
5180}
5181
5182static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5183{
5184 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5185 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5186
5187 if (rcvd->max_resp_sz > sent->max_resp_sz)
5188 return -EINVAL;
5189 /*
5190 * Our requested max_ops is the minimum we need; we're not
5191 * prepared to break up compounds into smaller pieces than that.
5192 * So, no point even trying to continue if the server won't
5193 * cooperate:
5194 */
5195 if (rcvd->max_ops < sent->max_ops)
5196 return -EINVAL;
5197 if (rcvd->max_reqs == 0)
5198 return -EINVAL;
5199 return 0;
5200}
5201
5202static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5203{
5204 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5205 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5206
5207 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5208 return -EINVAL;
5209 if (rcvd->max_resp_sz < sent->max_resp_sz)
5210 return -EINVAL;
5211 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5212 return -EINVAL;
5213 /* These would render the backchannel useless: */
5214 if (rcvd->max_ops == 0)
5215 return -EINVAL;
5216 if (rcvd->max_reqs == 0)
5217 return -EINVAL;
5218 return 0;
5219}
5220
5221static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5222 struct nfs4_session *session)
5223{
5224 int ret;
5225
5226 ret = nfs4_verify_fore_channel_attrs(args, session);
5227 if (ret)
5228 return ret;
5229 return nfs4_verify_back_channel_attrs(args, session);
5230}
5231
5232static int _nfs4_proc_create_session(struct nfs_client *clp)
5233{
5234 struct nfs4_session *session = clp->cl_session;
5235 struct nfs41_create_session_args args = {
5236 .client = clp,
5237 .cb_program = NFS4_CALLBACK,
5238 };
5239 struct nfs41_create_session_res res = {
5240 .client = clp,
5241 };
5242 struct rpc_message msg = {
5243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5244 .rpc_argp = &args,
5245 .rpc_resp = &res,
5246 };
5247 int status;
5248
5249 nfs4_init_channel_attrs(&args);
5250 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5251
5252 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5253
5254 if (!status)
5255 /* Verify the session's negotiated channel_attrs values */
5256 status = nfs4_verify_channel_attrs(&args, session);
5257 if (!status) {
5258 /* Increment the clientid slot sequence id */
5259 clp->cl_seqid++;
5260 }
5261
5262 return status;
5263}
5264
5265/*
5266 * Issues a CREATE_SESSION operation to the server.
5267 * It is the responsibility of the caller to verify the session is
5268 * expired before calling this routine.
5269 */
5270int nfs4_proc_create_session(struct nfs_client *clp)
5271{
5272 int status;
5273 unsigned *ptr;
5274 struct nfs4_session *session = clp->cl_session;
5275
5276 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5277
5278 status = _nfs4_proc_create_session(clp);
5279 if (status)
5280 goto out;
5281
5282 /* Init and reset the fore channel */
5283 status = nfs4_init_slot_tables(session);
5284 dprintk("slot table initialization returned %d\n", status);
5285 if (status)
5286 goto out;
5287 status = nfs4_reset_slot_tables(session);
5288 dprintk("slot table reset returned %d\n", status);
5289 if (status)
5290 goto out;
5291
5292 ptr = (unsigned *)&session->sess_id.data[0];
5293 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5294 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5295out:
5296 dprintk("<-- %s\n", __func__);
5297 return status;
5298}
5299
5300/*
5301 * Issue the over-the-wire RPC DESTROY_SESSION.
5302 * The caller must serialize access to this routine.
5303 */
5304int nfs4_proc_destroy_session(struct nfs4_session *session)
5305{
5306 int status = 0;
5307 struct rpc_message msg;
5308
5309 dprintk("--> nfs4_proc_destroy_session\n");
5310
5311 /* session is still being setup */
5312 if (session->clp->cl_cons_state != NFS_CS_READY)
5313 return status;
5314
5315 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5316 msg.rpc_argp = session;
5317 msg.rpc_resp = NULL;
5318 msg.rpc_cred = NULL;
5319 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5320
5321 if (status)
5322 printk(KERN_WARNING
5323 "Got error %d from the server on DESTROY_SESSION. "
5324 "Session has been destroyed regardless...\n", status);
5325
5326 dprintk("<-- nfs4_proc_destroy_session\n");
5327 return status;
5328}
5329
5330int nfs4_init_session(struct nfs_server *server)
5331{
5332 struct nfs_client *clp = server->nfs_client;
5333 struct nfs4_session *session;
5334 unsigned int rsize, wsize;
5335 int ret;
5336
5337 if (!nfs4_has_session(clp))
5338 return 0;
5339
5340 session = clp->cl_session;
5341 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5342 return 0;
5343
5344 rsize = server->rsize;
5345 if (rsize == 0)
5346 rsize = NFS_MAX_FILE_IO_SIZE;
5347 wsize = server->wsize;
5348 if (wsize == 0)
5349 wsize = NFS_MAX_FILE_IO_SIZE;
5350
5351 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5352 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5353
5354 ret = nfs4_recover_expired_lease(server);
5355 if (!ret)
5356 ret = nfs4_check_client_ready(clp);
5357 return ret;
5358}
5359
5360int nfs4_init_ds_session(struct nfs_client *clp)
5361{
5362 struct nfs4_session *session = clp->cl_session;
5363 int ret;
5364
5365 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5366 return 0;
5367
5368 ret = nfs4_client_recover_expired_lease(clp);
5369 if (!ret)
5370 /* Test for the DS role */
5371 if (!is_ds_client(clp))
5372 ret = -ENODEV;
5373 if (!ret)
5374 ret = nfs4_check_client_ready(clp);
5375 return ret;
5376
5377}
5378EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5379
5380
5381/*
5382 * Renew the cl_session lease.
5383 */
5384struct nfs4_sequence_data {
5385 struct nfs_client *clp;
5386 struct nfs4_sequence_args args;
5387 struct nfs4_sequence_res res;
5388};
5389
5390static void nfs41_sequence_release(void *data)
5391{
5392 struct nfs4_sequence_data *calldata = data;
5393 struct nfs_client *clp = calldata->clp;
5394
5395 if (atomic_read(&clp->cl_count) > 1)
5396 nfs4_schedule_state_renewal(clp);
5397 nfs_put_client(clp);
5398 kfree(calldata);
5399}
5400
5401static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5402{
5403 switch(task->tk_status) {
5404 case -NFS4ERR_DELAY:
5405 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5406 return -EAGAIN;
5407 default:
5408 nfs4_schedule_lease_recovery(clp);
5409 }
5410 return 0;
5411}
5412
5413static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5414{
5415 struct nfs4_sequence_data *calldata = data;
5416 struct nfs_client *clp = calldata->clp;
5417
5418 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5419 return;
5420
5421 if (task->tk_status < 0) {
5422 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5423 if (atomic_read(&clp->cl_count) == 1)
5424 goto out;
5425
5426 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5427 rpc_restart_call_prepare(task);
5428 return;
5429 }
5430 }
5431 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5432out:
5433 dprintk("<-- %s\n", __func__);
5434}
5435
5436static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5437{
5438 struct nfs4_sequence_data *calldata = data;
5439 struct nfs_client *clp = calldata->clp;
5440 struct nfs4_sequence_args *args;
5441 struct nfs4_sequence_res *res;
5442
5443 args = task->tk_msg.rpc_argp;
5444 res = task->tk_msg.rpc_resp;
5445
5446 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5447 return;
5448 rpc_call_start(task);
5449}
5450
5451static const struct rpc_call_ops nfs41_sequence_ops = {
5452 .rpc_call_done = nfs41_sequence_call_done,
5453 .rpc_call_prepare = nfs41_sequence_prepare,
5454 .rpc_release = nfs41_sequence_release,
5455};
5456
5457static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5458{
5459 struct nfs4_sequence_data *calldata;
5460 struct rpc_message msg = {
5461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5462 .rpc_cred = cred,
5463 };
5464 struct rpc_task_setup task_setup_data = {
5465 .rpc_client = clp->cl_rpcclient,
5466 .rpc_message = &msg,
5467 .callback_ops = &nfs41_sequence_ops,
5468 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5469 };
5470
5471 if (!atomic_inc_not_zero(&clp->cl_count))
5472 return ERR_PTR(-EIO);
5473 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5474 if (calldata == NULL) {
5475 nfs_put_client(clp);
5476 return ERR_PTR(-ENOMEM);
5477 }
5478 msg.rpc_argp = &calldata->args;
5479 msg.rpc_resp = &calldata->res;
5480 calldata->clp = clp;
5481 task_setup_data.callback_data = calldata;
5482
5483 return rpc_run_task(&task_setup_data);
5484}
5485
5486static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5487{
5488 struct rpc_task *task;
5489 int ret = 0;
5490
5491 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5492 return 0;
5493 task = _nfs41_proc_sequence(clp, cred);
5494 if (IS_ERR(task))
5495 ret = PTR_ERR(task);
5496 else
5497 rpc_put_task_async(task);
5498 dprintk("<-- %s status=%d\n", __func__, ret);
5499 return ret;
5500}
5501
5502static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5503{
5504 struct rpc_task *task;
5505 int ret;
5506
5507 task = _nfs41_proc_sequence(clp, cred);
5508 if (IS_ERR(task)) {
5509 ret = PTR_ERR(task);
5510 goto out;
5511 }
5512 ret = rpc_wait_for_completion_task(task);
5513 if (!ret) {
5514 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5515
5516 if (task->tk_status == 0)
5517 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5518 ret = task->tk_status;
5519 }
5520 rpc_put_task(task);
5521out:
5522 dprintk("<-- %s status=%d\n", __func__, ret);
5523 return ret;
5524}
5525
5526struct nfs4_reclaim_complete_data {
5527 struct nfs_client *clp;
5528 struct nfs41_reclaim_complete_args arg;
5529 struct nfs41_reclaim_complete_res res;
5530};
5531
5532static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5533{
5534 struct nfs4_reclaim_complete_data *calldata = data;
5535
5536 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5537 if (nfs41_setup_sequence(calldata->clp->cl_session,
5538 &calldata->arg.seq_args,
5539 &calldata->res.seq_res, 0, task))
5540 return;
5541
5542 rpc_call_start(task);
5543}
5544
5545static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5546{
5547 switch(task->tk_status) {
5548 case 0:
5549 case -NFS4ERR_COMPLETE_ALREADY:
5550 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5551 break;
5552 case -NFS4ERR_DELAY:
5553 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5554 /* fall through */
5555 case -NFS4ERR_RETRY_UNCACHED_REP:
5556 return -EAGAIN;
5557 default:
5558 nfs4_schedule_lease_recovery(clp);
5559 }
5560 return 0;
5561}
5562
5563static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5564{
5565 struct nfs4_reclaim_complete_data *calldata = data;
5566 struct nfs_client *clp = calldata->clp;
5567 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5568
5569 dprintk("--> %s\n", __func__);
5570 if (!nfs41_sequence_done(task, res))
5571 return;
5572
5573 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5574 rpc_restart_call_prepare(task);
5575 return;
5576 }
5577 dprintk("<-- %s\n", __func__);
5578}
5579
5580static void nfs4_free_reclaim_complete_data(void *data)
5581{
5582 struct nfs4_reclaim_complete_data *calldata = data;
5583
5584 kfree(calldata);
5585}
5586
5587static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5588 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5589 .rpc_call_done = nfs4_reclaim_complete_done,
5590 .rpc_release = nfs4_free_reclaim_complete_data,
5591};
5592
5593/*
5594 * Issue a global reclaim complete.
5595 */
5596static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5597{
5598 struct nfs4_reclaim_complete_data *calldata;
5599 struct rpc_task *task;
5600 struct rpc_message msg = {
5601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5602 };
5603 struct rpc_task_setup task_setup_data = {
5604 .rpc_client = clp->cl_rpcclient,
5605 .rpc_message = &msg,
5606 .callback_ops = &nfs4_reclaim_complete_call_ops,
5607 .flags = RPC_TASK_ASYNC,
5608 };
5609 int status = -ENOMEM;
5610
5611 dprintk("--> %s\n", __func__);
5612 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5613 if (calldata == NULL)
5614 goto out;
5615 calldata->clp = clp;
5616 calldata->arg.one_fs = 0;
5617
5618 msg.rpc_argp = &calldata->arg;
5619 msg.rpc_resp = &calldata->res;
5620 task_setup_data.callback_data = calldata;
5621 task = rpc_run_task(&task_setup_data);
5622 if (IS_ERR(task)) {
5623 status = PTR_ERR(task);
5624 goto out;
5625 }
5626 status = nfs4_wait_for_completion_rpc_task(task);
5627 if (status == 0)
5628 status = task->tk_status;
5629 rpc_put_task(task);
5630 return 0;
5631out:
5632 dprintk("<-- %s status=%d\n", __func__, status);
5633 return status;
5634}
5635
5636static void
5637nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5638{
5639 struct nfs4_layoutget *lgp = calldata;
5640 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5641
5642 dprintk("--> %s\n", __func__);
5643 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5644 * right now covering the LAYOUTGET we are about to send.
5645 * However, that is not so catastrophic, and there seems
5646 * to be no way to prevent it completely.
5647 */
5648 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5649 &lgp->res.seq_res, 0, task))
5650 return;
5651 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5652 NFS_I(lgp->args.inode)->layout,
5653 lgp->args.ctx->state)) {
5654 rpc_exit(task, NFS4_OK);
5655 return;
5656 }
5657 rpc_call_start(task);
5658}
5659
5660static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5661{
5662 struct nfs4_layoutget *lgp = calldata;
5663 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5664
5665 dprintk("--> %s\n", __func__);
5666
5667 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5668 return;
5669
5670 switch (task->tk_status) {
5671 case 0:
5672 break;
5673 case -NFS4ERR_LAYOUTTRYLATER:
5674 case -NFS4ERR_RECALLCONFLICT:
5675 task->tk_status = -NFS4ERR_DELAY;
5676 /* Fall through */
5677 default:
5678 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5679 rpc_restart_call_prepare(task);
5680 return;
5681 }
5682 }
5683 dprintk("<-- %s\n", __func__);
5684}
5685
5686static void nfs4_layoutget_release(void *calldata)
5687{
5688 struct nfs4_layoutget *lgp = calldata;
5689
5690 dprintk("--> %s\n", __func__);
5691 put_nfs_open_context(lgp->args.ctx);
5692 kfree(calldata);
5693 dprintk("<-- %s\n", __func__);
5694}
5695
5696static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5697 .rpc_call_prepare = nfs4_layoutget_prepare,
5698 .rpc_call_done = nfs4_layoutget_done,
5699 .rpc_release = nfs4_layoutget_release,
5700};
5701
5702int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5703{
5704 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5705 struct rpc_task *task;
5706 struct rpc_message msg = {
5707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5708 .rpc_argp = &lgp->args,
5709 .rpc_resp = &lgp->res,
5710 };
5711 struct rpc_task_setup task_setup_data = {
5712 .rpc_client = server->client,
5713 .rpc_message = &msg,
5714 .callback_ops = &nfs4_layoutget_call_ops,
5715 .callback_data = lgp,
5716 .flags = RPC_TASK_ASYNC,
5717 };
5718 int status = 0;
5719
5720 dprintk("--> %s\n", __func__);
5721
5722 lgp->res.layoutp = &lgp->args.layout;
5723 lgp->res.seq_res.sr_slot = NULL;
5724 task = rpc_run_task(&task_setup_data);
5725 if (IS_ERR(task))
5726 return PTR_ERR(task);
5727 status = nfs4_wait_for_completion_rpc_task(task);
5728 if (status == 0)
5729 status = task->tk_status;
5730 if (status == 0)
5731 status = pnfs_layout_process(lgp);
5732 rpc_put_task(task);
5733 dprintk("<-- %s status=%d\n", __func__, status);
5734 return status;
5735}
5736
5737static void
5738nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5739{
5740 struct nfs4_layoutreturn *lrp = calldata;
5741
5742 dprintk("--> %s\n", __func__);
5743 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5744 &lrp->res.seq_res, 0, task))
5745 return;
5746 rpc_call_start(task);
5747}
5748
5749static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5750{
5751 struct nfs4_layoutreturn *lrp = calldata;
5752 struct nfs_server *server;
5753 struct pnfs_layout_hdr *lo = lrp->args.layout;
5754
5755 dprintk("--> %s\n", __func__);
5756
5757 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5758 return;
5759
5760 server = NFS_SERVER(lrp->args.inode);
5761 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5762 nfs_restart_rpc(task, lrp->clp);
5763 return;
5764 }
5765 spin_lock(&lo->plh_inode->i_lock);
5766 if (task->tk_status == 0) {
5767 if (lrp->res.lrs_present) {
5768 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5769 } else
5770 BUG_ON(!list_empty(&lo->plh_segs));
5771 }
5772 lo->plh_block_lgets--;
5773 spin_unlock(&lo->plh_inode->i_lock);
5774 dprintk("<-- %s\n", __func__);
5775}
5776
5777static void nfs4_layoutreturn_release(void *calldata)
5778{
5779 struct nfs4_layoutreturn *lrp = calldata;
5780
5781 dprintk("--> %s\n", __func__);
5782 put_layout_hdr(lrp->args.layout);
5783 kfree(calldata);
5784 dprintk("<-- %s\n", __func__);
5785}
5786
5787static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5788 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5789 .rpc_call_done = nfs4_layoutreturn_done,
5790 .rpc_release = nfs4_layoutreturn_release,
5791};
5792
5793int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5794{
5795 struct rpc_task *task;
5796 struct rpc_message msg = {
5797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5798 .rpc_argp = &lrp->args,
5799 .rpc_resp = &lrp->res,
5800 };
5801 struct rpc_task_setup task_setup_data = {
5802 .rpc_client = lrp->clp->cl_rpcclient,
5803 .rpc_message = &msg,
5804 .callback_ops = &nfs4_layoutreturn_call_ops,
5805 .callback_data = lrp,
5806 };
5807 int status;
5808
5809 dprintk("--> %s\n", __func__);
5810 task = rpc_run_task(&task_setup_data);
5811 if (IS_ERR(task))
5812 return PTR_ERR(task);
5813 status = task->tk_status;
5814 dprintk("<-- %s status=%d\n", __func__, status);
5815 rpc_put_task(task);
5816 return status;
5817}
5818
5819/*
5820 * Retrieve the list of Data Server devices from the MDS.
5821 */
5822static int _nfs4_getdevicelist(struct nfs_server *server,
5823 const struct nfs_fh *fh,
5824 struct pnfs_devicelist *devlist)
5825{
5826 struct nfs4_getdevicelist_args args = {
5827 .fh = fh,
5828 .layoutclass = server->pnfs_curr_ld->id,
5829 };
5830 struct nfs4_getdevicelist_res res = {
5831 .devlist = devlist,
5832 };
5833 struct rpc_message msg = {
5834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5835 .rpc_argp = &args,
5836 .rpc_resp = &res,
5837 };
5838 int status;
5839
5840 dprintk("--> %s\n", __func__);
5841 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5842 &res.seq_res, 0);
5843 dprintk("<-- %s status=%d\n", __func__, status);
5844 return status;
5845}
5846
5847int nfs4_proc_getdevicelist(struct nfs_server *server,
5848 const struct nfs_fh *fh,
5849 struct pnfs_devicelist *devlist)
5850{
5851 struct nfs4_exception exception = { };
5852 int err;
5853
5854 do {
5855 err = nfs4_handle_exception(server,
5856 _nfs4_getdevicelist(server, fh, devlist),
5857 &exception);
5858 } while (exception.retry);
5859
5860 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5861 err, devlist->num_devs);
5862
5863 return err;
5864}
5865EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5866
5867static int
5868_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5869{
5870 struct nfs4_getdeviceinfo_args args = {
5871 .pdev = pdev,
5872 };
5873 struct nfs4_getdeviceinfo_res res = {
5874 .pdev = pdev,
5875 };
5876 struct rpc_message msg = {
5877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5878 .rpc_argp = &args,
5879 .rpc_resp = &res,
5880 };
5881 int status;
5882
5883 dprintk("--> %s\n", __func__);
5884 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5885 dprintk("<-- %s status=%d\n", __func__, status);
5886
5887 return status;
5888}
5889
5890int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5891{
5892 struct nfs4_exception exception = { };
5893 int err;
5894
5895 do {
5896 err = nfs4_handle_exception(server,
5897 _nfs4_proc_getdeviceinfo(server, pdev),
5898 &exception);
5899 } while (exception.retry);
5900 return err;
5901}
5902EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5903
5904static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5905{
5906 struct nfs4_layoutcommit_data *data = calldata;
5907 struct nfs_server *server = NFS_SERVER(data->args.inode);
5908
5909 if (nfs4_setup_sequence(server, &data->args.seq_args,
5910 &data->res.seq_res, 1, task))
5911 return;
5912 rpc_call_start(task);
5913}
5914
5915static void
5916nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5917{
5918 struct nfs4_layoutcommit_data *data = calldata;
5919 struct nfs_server *server = NFS_SERVER(data->args.inode);
5920
5921 if (!nfs4_sequence_done(task, &data->res.seq_res))
5922 return;
5923
5924 switch (task->tk_status) { /* Just ignore these failures */
5925 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5926 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5927 case NFS4ERR_BADLAYOUT: /* no layout */
5928 case NFS4ERR_GRACE: /* loca_recalim always false */
5929 task->tk_status = 0;
5930 }
5931
5932 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5933 nfs_restart_rpc(task, server->nfs_client);
5934 return;
5935 }
5936
5937 if (task->tk_status == 0)
5938 nfs_post_op_update_inode_force_wcc(data->args.inode,
5939 data->res.fattr);
5940}
5941
5942static void nfs4_layoutcommit_release(void *calldata)
5943{
5944 struct nfs4_layoutcommit_data *data = calldata;
5945 struct pnfs_layout_segment *lseg, *tmp;
5946
5947 pnfs_cleanup_layoutcommit(data);
5948 /* Matched by references in pnfs_set_layoutcommit */
5949 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
5950 list_del_init(&lseg->pls_lc_list);
5951 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
5952 &lseg->pls_flags))
5953 put_lseg(lseg);
5954 }
5955 put_rpccred(data->cred);
5956 kfree(data);
5957}
5958
5959static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5960 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5961 .rpc_call_done = nfs4_layoutcommit_done,
5962 .rpc_release = nfs4_layoutcommit_release,
5963};
5964
5965int
5966nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
5967{
5968 struct rpc_message msg = {
5969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5970 .rpc_argp = &data->args,
5971 .rpc_resp = &data->res,
5972 .rpc_cred = data->cred,
5973 };
5974 struct rpc_task_setup task_setup_data = {
5975 .task = &data->task,
5976 .rpc_client = NFS_CLIENT(data->args.inode),
5977 .rpc_message = &msg,
5978 .callback_ops = &nfs4_layoutcommit_ops,
5979 .callback_data = data,
5980 .flags = RPC_TASK_ASYNC,
5981 };
5982 struct rpc_task *task;
5983 int status = 0;
5984
5985 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5986 "lbw: %llu inode %lu\n",
5987 data->task.tk_pid, sync,
5988 data->args.lastbytewritten,
5989 data->args.inode->i_ino);
5990
5991 task = rpc_run_task(&task_setup_data);
5992 if (IS_ERR(task))
5993 return PTR_ERR(task);
5994 if (sync == false)
5995 goto out;
5996 status = nfs4_wait_for_completion_rpc_task(task);
5997 if (status != 0)
5998 goto out;
5999 status = task->tk_status;
6000out:
6001 dprintk("%s: status %d\n", __func__, status);
6002 rpc_put_task(task);
6003 return status;
6004}
6005
6006static int
6007_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6008 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6009{
6010 struct nfs41_secinfo_no_name_args args = {
6011 .style = SECINFO_STYLE_CURRENT_FH,
6012 };
6013 struct nfs4_secinfo_res res = {
6014 .flavors = flavors,
6015 };
6016 struct rpc_message msg = {
6017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6018 .rpc_argp = &args,
6019 .rpc_resp = &res,
6020 };
6021 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6022}
6023
6024static int
6025nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6026 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6027{
6028 struct nfs4_exception exception = { };
6029 int err;
6030 do {
6031 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6032 switch (err) {
6033 case 0:
6034 case -NFS4ERR_WRONGSEC:
6035 case -NFS4ERR_NOTSUPP:
6036 break;
6037 default:
6038 err = nfs4_handle_exception(server, err, &exception);
6039 }
6040 } while (exception.retry);
6041 return err;
6042}
6043
6044static int
6045nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6046 struct nfs_fsinfo *info)
6047{
6048 int err;
6049 struct page *page;
6050 rpc_authflavor_t flavor;
6051 struct nfs4_secinfo_flavors *flavors;
6052
6053 page = alloc_page(GFP_KERNEL);
6054 if (!page) {
6055 err = -ENOMEM;
6056 goto out;
6057 }
6058
6059 flavors = page_address(page);
6060 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6061
6062 /*
6063 * Fall back on "guess and check" method if
6064 * the server doesn't support SECINFO_NO_NAME
6065 */
6066 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6067 err = nfs4_find_root_sec(server, fhandle, info);
6068 goto out_freepage;
6069 }
6070 if (err)
6071 goto out_freepage;
6072
6073 flavor = nfs_find_best_sec(flavors);
6074 if (err == 0)
6075 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6076
6077out_freepage:
6078 put_page(page);
6079 if (err == -EACCES)
6080 return -EPERM;
6081out:
6082 return err;
6083}
6084static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6085{
6086 int status;
6087 struct nfs41_test_stateid_args args = {
6088 .stateid = &state->stateid,
6089 };
6090 struct nfs41_test_stateid_res res;
6091 struct rpc_message msg = {
6092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6093 .rpc_argp = &args,
6094 .rpc_resp = &res,
6095 };
6096 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6097 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6098 return status;
6099}
6100
6101static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6102{
6103 struct nfs4_exception exception = { };
6104 int err;
6105 do {
6106 err = nfs4_handle_exception(server,
6107 _nfs41_test_stateid(server, state),
6108 &exception);
6109 } while (exception.retry);
6110 return err;
6111}
6112
6113static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6114{
6115 int status;
6116 struct nfs41_free_stateid_args args = {
6117 .stateid = &state->stateid,
6118 };
6119 struct nfs41_free_stateid_res res;
6120 struct rpc_message msg = {
6121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6122 .rpc_argp = &args,
6123 .rpc_resp = &res,
6124 };
6125
6126 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6127 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6128 return status;
6129}
6130
6131static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6132{
6133 struct nfs4_exception exception = { };
6134 int err;
6135 do {
6136 err = nfs4_handle_exception(server,
6137 _nfs4_free_stateid(server, state),
6138 &exception);
6139 } while (exception.retry);
6140 return err;
6141}
6142#endif /* CONFIG_NFS_V4_1 */
6143
6144struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6145 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6146 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6147 .recover_open = nfs4_open_reclaim,
6148 .recover_lock = nfs4_lock_reclaim,
6149 .establish_clid = nfs4_init_clientid,
6150 .get_clid_cred = nfs4_get_setclientid_cred,
6151};
6152
6153#if defined(CONFIG_NFS_V4_1)
6154struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6155 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6156 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6157 .recover_open = nfs4_open_reclaim,
6158 .recover_lock = nfs4_lock_reclaim,
6159 .establish_clid = nfs41_init_clientid,
6160 .get_clid_cred = nfs4_get_exchange_id_cred,
6161 .reclaim_complete = nfs41_proc_reclaim_complete,
6162};
6163#endif /* CONFIG_NFS_V4_1 */
6164
6165struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6166 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6167 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6168 .recover_open = nfs4_open_expired,
6169 .recover_lock = nfs4_lock_expired,
6170 .establish_clid = nfs4_init_clientid,
6171 .get_clid_cred = nfs4_get_setclientid_cred,
6172};
6173
6174#if defined(CONFIG_NFS_V4_1)
6175struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6176 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6177 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6178 .recover_open = nfs41_open_expired,
6179 .recover_lock = nfs41_lock_expired,
6180 .establish_clid = nfs41_init_clientid,
6181 .get_clid_cred = nfs4_get_exchange_id_cred,
6182};
6183#endif /* CONFIG_NFS_V4_1 */
6184
6185struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6186 .sched_state_renewal = nfs4_proc_async_renew,
6187 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6188 .renew_lease = nfs4_proc_renew,
6189};
6190
6191#if defined(CONFIG_NFS_V4_1)
6192struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6193 .sched_state_renewal = nfs41_proc_async_sequence,
6194 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6195 .renew_lease = nfs4_proc_sequence,
6196};
6197#endif
6198
6199static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6200 .minor_version = 0,
6201 .call_sync = _nfs4_call_sync,
6202 .validate_stateid = nfs4_validate_delegation_stateid,
6203 .find_root_sec = nfs4_find_root_sec,
6204 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6205 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6206 .state_renewal_ops = &nfs40_state_renewal_ops,
6207};
6208
6209#if defined(CONFIG_NFS_V4_1)
6210static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6211 .minor_version = 1,
6212 .call_sync = _nfs4_call_sync_session,
6213 .validate_stateid = nfs41_validate_delegation_stateid,
6214 .find_root_sec = nfs41_find_root_sec,
6215 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6216 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6217 .state_renewal_ops = &nfs41_state_renewal_ops,
6218};
6219#endif
6220
6221const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6222 [0] = &nfs_v4_0_minor_ops,
6223#if defined(CONFIG_NFS_V4_1)
6224 [1] = &nfs_v4_1_minor_ops,
6225#endif
6226};
6227
6228static const struct inode_operations nfs4_file_inode_operations = {
6229 .permission = nfs_permission,
6230 .getattr = nfs_getattr,
6231 .setattr = nfs_setattr,
6232 .getxattr = generic_getxattr,
6233 .setxattr = generic_setxattr,
6234 .listxattr = generic_listxattr,
6235 .removexattr = generic_removexattr,
6236};
6237
6238const struct nfs_rpc_ops nfs_v4_clientops = {
6239 .version = 4, /* protocol version */
6240 .dentry_ops = &nfs4_dentry_operations,
6241 .dir_inode_ops = &nfs4_dir_inode_operations,
6242 .file_inode_ops = &nfs4_file_inode_operations,
6243 .getroot = nfs4_proc_get_root,
6244 .getattr = nfs4_proc_getattr,
6245 .setattr = nfs4_proc_setattr,
6246 .lookup = nfs4_proc_lookup,
6247 .access = nfs4_proc_access,
6248 .readlink = nfs4_proc_readlink,
6249 .create = nfs4_proc_create,
6250 .remove = nfs4_proc_remove,
6251 .unlink_setup = nfs4_proc_unlink_setup,
6252 .unlink_done = nfs4_proc_unlink_done,
6253 .rename = nfs4_proc_rename,
6254 .rename_setup = nfs4_proc_rename_setup,
6255 .rename_done = nfs4_proc_rename_done,
6256 .link = nfs4_proc_link,
6257 .symlink = nfs4_proc_symlink,
6258 .mkdir = nfs4_proc_mkdir,
6259 .rmdir = nfs4_proc_remove,
6260 .readdir = nfs4_proc_readdir,
6261 .mknod = nfs4_proc_mknod,
6262 .statfs = nfs4_proc_statfs,
6263 .fsinfo = nfs4_proc_fsinfo,
6264 .pathconf = nfs4_proc_pathconf,
6265 .set_capabilities = nfs4_server_capabilities,
6266 .decode_dirent = nfs4_decode_dirent,
6267 .read_setup = nfs4_proc_read_setup,
6268 .read_done = nfs4_read_done,
6269 .write_setup = nfs4_proc_write_setup,
6270 .write_done = nfs4_write_done,
6271 .commit_setup = nfs4_proc_commit_setup,
6272 .commit_done = nfs4_commit_done,
6273 .lock = nfs4_proc_lock,
6274 .clear_acl_cache = nfs4_zap_acl_attr,
6275 .close_context = nfs4_close_context,
6276 .open_context = nfs4_atomic_open,
6277 .init_client = nfs4_init_client,
6278 .secinfo = nfs4_proc_secinfo,
6279};
6280
6281static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6282 .prefix = XATTR_NAME_NFSV4_ACL,
6283 .list = nfs4_xattr_list_nfs4_acl,
6284 .get = nfs4_xattr_get_nfs4_acl,
6285 .set = nfs4_xattr_set_nfs4_acl,
6286};
6287
6288const struct xattr_handler *nfs4_xattr_handlers[] = {
6289 &nfs4_xattr_nfs4_acl_handler,
6290 NULL
6291};
6292
6293/*
6294 * Local variables:
6295 * c-basic-offset: 8
6296 * End:
6297 */
Linux 6.x block layer and io_uring tree(s)