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NFS: Use kzalloc() instead of kmalloc() in the idmapper
[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/ratelimit.h>
43#include <linux/printk.h>
44#include <linux/slab.h>
45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
50#include <linux/nfs_mount.h>
51#include <linux/namei.h>
52#include <linux/mount.h>
53#include <linux/module.h>
54#include <linux/nfs_idmap.h>
55#include <linux/sunrpc/bc_xprt.h>
56#include <linux/xattr.h>
57#include <linux/utsname.h>
58#include <linux/freezer.h>
59
60#include "nfs4_fs.h"
61#include "delegation.h"
62#include "internal.h"
63#include "iostat.h"
64#include "callback.h"
65#include "pnfs.h"
66#include "netns.h"
67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
70#define NFS4_POLL_RETRY_MIN (HZ/10)
71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
75struct nfs4_opendata;
76static int _nfs4_proc_open(struct nfs4_opendata *data);
77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86#ifdef CONFIG_NFS_V4_1
87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89#endif
90/* Prevent leaks of NFSv4 errors into userland */
91static int nfs4_map_errors(int err)
92{
93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
107 default:
108 dprintk("%s could not handle NFSv4 error %d\n",
109 __func__, -err);
110 break;
111 }
112 return -EIO;
113}
114
115/*
116 * This is our standard bitmap for GETATTR requests.
117 */
118const u32 nfs4_fattr_bitmap[3] = {
119 FATTR4_WORD0_TYPE
120 | FATTR4_WORD0_CHANGE
121 | FATTR4_WORD0_SIZE
122 | FATTR4_WORD0_FSID
123 | FATTR4_WORD0_FILEID,
124 FATTR4_WORD1_MODE
125 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
133};
134
135static const u32 nfs4_pnfs_open_bitmap[3] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID,
141 FATTR4_WORD1_MODE
142 | FATTR4_WORD1_NUMLINKS
143 | FATTR4_WORD1_OWNER
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY,
150 FATTR4_WORD2_MDSTHRESHOLD
151};
152
153const u32 nfs4_statfs_bitmap[2] = {
154 FATTR4_WORD0_FILES_AVAIL
155 | FATTR4_WORD0_FILES_FREE
156 | FATTR4_WORD0_FILES_TOTAL,
157 FATTR4_WORD1_SPACE_AVAIL
158 | FATTR4_WORD1_SPACE_FREE
159 | FATTR4_WORD1_SPACE_TOTAL
160};
161
162const u32 nfs4_pathconf_bitmap[2] = {
163 FATTR4_WORD0_MAXLINK
164 | FATTR4_WORD0_MAXNAME,
165 0
166};
167
168const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
169 | FATTR4_WORD0_MAXREAD
170 | FATTR4_WORD0_MAXWRITE
171 | FATTR4_WORD0_LEASE_TIME,
172 FATTR4_WORD1_TIME_DELTA
173 | FATTR4_WORD1_FS_LAYOUT_TYPES,
174 FATTR4_WORD2_LAYOUT_BLKSIZE
175};
176
177const u32 nfs4_fs_locations_bitmap[2] = {
178 FATTR4_WORD0_TYPE
179 | FATTR4_WORD0_CHANGE
180 | FATTR4_WORD0_SIZE
181 | FATTR4_WORD0_FSID
182 | FATTR4_WORD0_FILEID
183 | FATTR4_WORD0_FS_LOCATIONS,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
192 | FATTR4_WORD1_TIME_MODIFY
193 | FATTR4_WORD1_MOUNTED_ON_FILEID
194};
195
196static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
197 struct nfs4_readdir_arg *readdir)
198{
199 __be32 *start, *p;
200
201 BUG_ON(readdir->count < 80);
202 if (cookie > 2) {
203 readdir->cookie = cookie;
204 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
205 return;
206 }
207
208 readdir->cookie = 0;
209 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
210 if (cookie == 2)
211 return;
212
213 /*
214 * NFSv4 servers do not return entries for '.' and '..'
215 * Therefore, we fake these entries here. We let '.'
216 * have cookie 0 and '..' have cookie 1. Note that
217 * when talking to the server, we always send cookie 0
218 * instead of 1 or 2.
219 */
220 start = p = kmap_atomic(*readdir->pages);
221
222 if (cookie == 0) {
223 *p++ = xdr_one; /* next */
224 *p++ = xdr_zero; /* cookie, first word */
225 *p++ = xdr_one; /* cookie, second word */
226 *p++ = xdr_one; /* entry len */
227 memcpy(p, ".\0\0\0", 4); /* entry */
228 p++;
229 *p++ = xdr_one; /* bitmap length */
230 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
231 *p++ = htonl(8); /* attribute buffer length */
232 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
233 }
234
235 *p++ = xdr_one; /* next */
236 *p++ = xdr_zero; /* cookie, first word */
237 *p++ = xdr_two; /* cookie, second word */
238 *p++ = xdr_two; /* entry len */
239 memcpy(p, "..\0\0", 4); /* entry */
240 p++;
241 *p++ = xdr_one; /* bitmap length */
242 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
243 *p++ = htonl(8); /* attribute buffer length */
244 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
245
246 readdir->pgbase = (char *)p - (char *)start;
247 readdir->count -= readdir->pgbase;
248 kunmap_atomic(start);
249}
250
251static int nfs4_wait_clnt_recover(struct nfs_client *clp)
252{
253 int res;
254
255 might_sleep();
256
257 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
258 nfs_wait_bit_killable, TASK_KILLABLE);
259 if (res)
260 return res;
261
262 if (clp->cl_cons_state < 0)
263 return clp->cl_cons_state;
264 return 0;
265}
266
267static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
268{
269 int res = 0;
270
271 might_sleep();
272
273 if (*timeout <= 0)
274 *timeout = NFS4_POLL_RETRY_MIN;
275 if (*timeout > NFS4_POLL_RETRY_MAX)
276 *timeout = NFS4_POLL_RETRY_MAX;
277 freezable_schedule_timeout_killable(*timeout);
278 if (fatal_signal_pending(current))
279 res = -ERESTARTSYS;
280 *timeout <<= 1;
281 return res;
282}
283
284/* This is the error handling routine for processes that are allowed
285 * to sleep.
286 */
287static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
288{
289 struct nfs_client *clp = server->nfs_client;
290 struct nfs4_state *state = exception->state;
291 struct inode *inode = exception->inode;
292 int ret = errorcode;
293
294 exception->retry = 0;
295 switch(errorcode) {
296 case 0:
297 return 0;
298 case -NFS4ERR_OPENMODE:
299 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
300 nfs4_inode_return_delegation(inode);
301 exception->retry = 1;
302 return 0;
303 }
304 if (state == NULL)
305 break;
306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
308 case -NFS4ERR_DELEG_REVOKED:
309 case -NFS4ERR_ADMIN_REVOKED:
310 case -NFS4ERR_BAD_STATEID:
311 if (state == NULL)
312 break;
313 nfs_remove_bad_delegation(state->inode);
314 nfs4_schedule_stateid_recovery(server, state);
315 goto wait_on_recovery;
316 case -NFS4ERR_EXPIRED:
317 if (state != NULL)
318 nfs4_schedule_stateid_recovery(server, state);
319 case -NFS4ERR_STALE_STATEID:
320 case -NFS4ERR_STALE_CLIENTID:
321 nfs4_schedule_lease_recovery(clp);
322 goto wait_on_recovery;
323#if defined(CONFIG_NFS_V4_1)
324 case -NFS4ERR_BADSESSION:
325 case -NFS4ERR_BADSLOT:
326 case -NFS4ERR_BAD_HIGH_SLOT:
327 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
328 case -NFS4ERR_DEADSESSION:
329 case -NFS4ERR_SEQ_FALSE_RETRY:
330 case -NFS4ERR_SEQ_MISORDERED:
331 dprintk("%s ERROR: %d Reset session\n", __func__,
332 errorcode);
333 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
334 exception->retry = 1;
335 break;
336#endif /* defined(CONFIG_NFS_V4_1) */
337 case -NFS4ERR_FILE_OPEN:
338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
347 case -EKEYEXPIRED:
348 ret = nfs4_delay(server->client, &exception->timeout);
349 if (ret != 0)
350 break;
351 case -NFS4ERR_RETRY_UNCACHED_REP:
352 case -NFS4ERR_OLD_STATEID:
353 exception->retry = 1;
354 break;
355 case -NFS4ERR_BADOWNER:
356 /* The following works around a Linux server bug! */
357 case -NFS4ERR_BADNAME:
358 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
359 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
360 exception->retry = 1;
361 printk(KERN_WARNING "NFS: v4 server %s "
362 "does not accept raw "
363 "uid/gids. "
364 "Reenabling the idmapper.\n",
365 server->nfs_client->cl_hostname);
366 }
367 }
368 /* We failed to handle the error */
369 return nfs4_map_errors(ret);
370wait_on_recovery:
371 ret = nfs4_wait_clnt_recover(clp);
372 if (ret == 0)
373 exception->retry = 1;
374 return ret;
375}
376
377
378static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
379{
380 spin_lock(&clp->cl_lock);
381 if (time_before(clp->cl_last_renewal,timestamp))
382 clp->cl_last_renewal = timestamp;
383 spin_unlock(&clp->cl_lock);
384}
385
386static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
387{
388 do_renew_lease(server->nfs_client, timestamp);
389}
390
391#if defined(CONFIG_NFS_V4_1)
392
393/*
394 * nfs4_free_slot - free a slot and efficiently update slot table.
395 *
396 * freeing a slot is trivially done by clearing its respective bit
397 * in the bitmap.
398 * If the freed slotid equals highest_used_slotid we want to update it
399 * so that the server would be able to size down the slot table if needed,
400 * otherwise we know that the highest_used_slotid is still in use.
401 * When updating highest_used_slotid there may be "holes" in the bitmap
402 * so we need to scan down from highest_used_slotid to 0 looking for the now
403 * highest slotid in use.
404 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
405 *
406 * Must be called while holding tbl->slot_tbl_lock
407 */
408static void
409nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
410{
411 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
412 /* clear used bit in bitmap */
413 __clear_bit(slotid, tbl->used_slots);
414
415 /* update highest_used_slotid when it is freed */
416 if (slotid == tbl->highest_used_slotid) {
417 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
418 if (slotid < tbl->max_slots)
419 tbl->highest_used_slotid = slotid;
420 else
421 tbl->highest_used_slotid = NFS4_NO_SLOT;
422 }
423 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
424 slotid, tbl->highest_used_slotid);
425}
426
427bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
428{
429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
430 return true;
431}
432
433/*
434 * Signal state manager thread if session fore channel is drained
435 */
436static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
437{
438 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
439 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
440 nfs4_set_task_privileged, NULL);
441 return;
442 }
443
444 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
445 return;
446
447 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
448 complete(&ses->fc_slot_table.complete);
449}
450
451/*
452 * Signal state manager thread if session back channel is drained
453 */
454void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
455{
456 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
457 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
458 return;
459 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
460 complete(&ses->bc_slot_table.complete);
461}
462
463static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
464{
465 struct nfs4_slot_table *tbl;
466
467 tbl = &res->sr_session->fc_slot_table;
468 if (!res->sr_slot) {
469 /* just wake up the next guy waiting since
470 * we may have not consumed a slot after all */
471 dprintk("%s: No slot\n", __func__);
472 return;
473 }
474
475 spin_lock(&tbl->slot_tbl_lock);
476 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
477 nfs4_check_drain_fc_complete(res->sr_session);
478 spin_unlock(&tbl->slot_tbl_lock);
479 res->sr_slot = NULL;
480}
481
482static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
483{
484 unsigned long timestamp;
485 struct nfs_client *clp;
486
487 /*
488 * sr_status remains 1 if an RPC level error occurred. The server
489 * may or may not have processed the sequence operation..
490 * Proceed as if the server received and processed the sequence
491 * operation.
492 */
493 if (res->sr_status == 1)
494 res->sr_status = NFS_OK;
495
496 /* don't increment the sequence number if the task wasn't sent */
497 if (!RPC_WAS_SENT(task))
498 goto out;
499
500 /* Check the SEQUENCE operation status */
501 switch (res->sr_status) {
502 case 0:
503 /* Update the slot's sequence and clientid lease timer */
504 ++res->sr_slot->seq_nr;
505 timestamp = res->sr_renewal_time;
506 clp = res->sr_session->clp;
507 do_renew_lease(clp, timestamp);
508 /* Check sequence flags */
509 if (res->sr_status_flags != 0)
510 nfs4_schedule_lease_recovery(clp);
511 break;
512 case -NFS4ERR_DELAY:
513 /* The server detected a resend of the RPC call and
514 * returned NFS4ERR_DELAY as per Section 2.10.6.2
515 * of RFC5661.
516 */
517 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
518 __func__,
519 res->sr_slot - res->sr_session->fc_slot_table.slots,
520 res->sr_slot->seq_nr);
521 goto out_retry;
522 default:
523 /* Just update the slot sequence no. */
524 ++res->sr_slot->seq_nr;
525 }
526out:
527 /* The session may be reset by one of the error handlers. */
528 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
529 nfs41_sequence_free_slot(res);
530 return 1;
531out_retry:
532 if (!rpc_restart_call(task))
533 goto out;
534 rpc_delay(task, NFS4_POLL_RETRY_MAX);
535 return 0;
536}
537
538static int nfs4_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 if (res->sr_session == NULL)
542 return 1;
543 return nfs41_sequence_done(task, res);
544}
545
546/*
547 * nfs4_find_slot - efficiently look for a free slot
548 *
549 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
550 * If found, we mark the slot as used, update the highest_used_slotid,
551 * and respectively set up the sequence operation args.
552 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
553 *
554 * Note: must be called with under the slot_tbl_lock.
555 */
556static u32
557nfs4_find_slot(struct nfs4_slot_table *tbl)
558{
559 u32 slotid;
560 u32 ret_id = NFS4_NO_SLOT;
561
562 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
563 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
564 tbl->max_slots);
565 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
566 if (slotid >= tbl->max_slots)
567 goto out;
568 __set_bit(slotid, tbl->used_slots);
569 if (slotid > tbl->highest_used_slotid ||
570 tbl->highest_used_slotid == NFS4_NO_SLOT)
571 tbl->highest_used_slotid = slotid;
572 ret_id = slotid;
573out:
574 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
575 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
576 return ret_id;
577}
578
579static void nfs41_init_sequence(struct nfs4_sequence_args *args,
580 struct nfs4_sequence_res *res, int cache_reply)
581{
582 args->sa_session = NULL;
583 args->sa_cache_this = 0;
584 if (cache_reply)
585 args->sa_cache_this = 1;
586 res->sr_session = NULL;
587 res->sr_slot = NULL;
588}
589
590int nfs41_setup_sequence(struct nfs4_session *session,
591 struct nfs4_sequence_args *args,
592 struct nfs4_sequence_res *res,
593 struct rpc_task *task)
594{
595 struct nfs4_slot *slot;
596 struct nfs4_slot_table *tbl;
597 u32 slotid;
598
599 dprintk("--> %s\n", __func__);
600 /* slot already allocated? */
601 if (res->sr_slot != NULL)
602 return 0;
603
604 tbl = &session->fc_slot_table;
605
606 spin_lock(&tbl->slot_tbl_lock);
607 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
608 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
609 /* The state manager will wait until the slot table is empty */
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
611 spin_unlock(&tbl->slot_tbl_lock);
612 dprintk("%s session is draining\n", __func__);
613 return -EAGAIN;
614 }
615
616 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
617 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
618 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
619 spin_unlock(&tbl->slot_tbl_lock);
620 dprintk("%s enforce FIFO order\n", __func__);
621 return -EAGAIN;
622 }
623
624 slotid = nfs4_find_slot(tbl);
625 if (slotid == NFS4_NO_SLOT) {
626 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
627 spin_unlock(&tbl->slot_tbl_lock);
628 dprintk("<-- %s: no free slots\n", __func__);
629 return -EAGAIN;
630 }
631 spin_unlock(&tbl->slot_tbl_lock);
632
633 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
634 slot = tbl->slots + slotid;
635 args->sa_session = session;
636 args->sa_slotid = slotid;
637
638 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
639
640 res->sr_session = session;
641 res->sr_slot = slot;
642 res->sr_renewal_time = jiffies;
643 res->sr_status_flags = 0;
644 /*
645 * sr_status is only set in decode_sequence, and so will remain
646 * set to 1 if an rpc level failure occurs.
647 */
648 res->sr_status = 1;
649 return 0;
650}
651EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
652
653int nfs4_setup_sequence(const struct nfs_server *server,
654 struct nfs4_sequence_args *args,
655 struct nfs4_sequence_res *res,
656 struct rpc_task *task)
657{
658 struct nfs4_session *session = nfs4_get_session(server);
659 int ret = 0;
660
661 if (session == NULL)
662 goto out;
663
664 dprintk("--> %s clp %p session %p sr_slot %td\n",
665 __func__, session->clp, session, res->sr_slot ?
666 res->sr_slot - session->fc_slot_table.slots : -1);
667
668 ret = nfs41_setup_sequence(session, args, res, task);
669out:
670 dprintk("<-- %s status=%d\n", __func__, ret);
671 return ret;
672}
673
674struct nfs41_call_sync_data {
675 const struct nfs_server *seq_server;
676 struct nfs4_sequence_args *seq_args;
677 struct nfs4_sequence_res *seq_res;
678};
679
680static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
681{
682 struct nfs41_call_sync_data *data = calldata;
683
684 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
685
686 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
687 data->seq_res, task))
688 return;
689 rpc_call_start(task);
690}
691
692static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
693{
694 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
695 nfs41_call_sync_prepare(task, calldata);
696}
697
698static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
699{
700 struct nfs41_call_sync_data *data = calldata;
701
702 nfs41_sequence_done(task, data->seq_res);
703}
704
705static const struct rpc_call_ops nfs41_call_sync_ops = {
706 .rpc_call_prepare = nfs41_call_sync_prepare,
707 .rpc_call_done = nfs41_call_sync_done,
708};
709
710static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
711 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
712 .rpc_call_done = nfs41_call_sync_done,
713};
714
715static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
716 struct nfs_server *server,
717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
719 struct nfs4_sequence_res *res,
720 int privileged)
721{
722 int ret;
723 struct rpc_task *task;
724 struct nfs41_call_sync_data data = {
725 .seq_server = server,
726 .seq_args = args,
727 .seq_res = res,
728 };
729 struct rpc_task_setup task_setup = {
730 .rpc_client = clnt,
731 .rpc_message = msg,
732 .callback_ops = &nfs41_call_sync_ops,
733 .callback_data = &data
734 };
735
736 if (privileged)
737 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
738 task = rpc_run_task(&task_setup);
739 if (IS_ERR(task))
740 ret = PTR_ERR(task);
741 else {
742 ret = task->tk_status;
743 rpc_put_task(task);
744 }
745 return ret;
746}
747
748int _nfs4_call_sync_session(struct rpc_clnt *clnt,
749 struct nfs_server *server,
750 struct rpc_message *msg,
751 struct nfs4_sequence_args *args,
752 struct nfs4_sequence_res *res,
753 int cache_reply)
754{
755 nfs41_init_sequence(args, res, cache_reply);
756 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
757}
758
759#else
760static inline
761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
766static int nfs4_sequence_done(struct rpc_task *task,
767 struct nfs4_sequence_res *res)
768{
769 return 1;
770}
771#endif /* CONFIG_NFS_V4_1 */
772
773int _nfs4_call_sync(struct rpc_clnt *clnt,
774 struct nfs_server *server,
775 struct rpc_message *msg,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
778 int cache_reply)
779{
780 nfs41_init_sequence(args, res, cache_reply);
781 return rpc_call_sync(clnt, msg, 0);
782}
783
784static inline
785int nfs4_call_sync(struct rpc_clnt *clnt,
786 struct nfs_server *server,
787 struct rpc_message *msg,
788 struct nfs4_sequence_args *args,
789 struct nfs4_sequence_res *res,
790 int cache_reply)
791{
792 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
793 args, res, cache_reply);
794}
795
796static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
797{
798 struct nfs_inode *nfsi = NFS_I(dir);
799
800 spin_lock(&dir->i_lock);
801 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
802 if (!cinfo->atomic || cinfo->before != dir->i_version)
803 nfs_force_lookup_revalidate(dir);
804 dir->i_version = cinfo->after;
805 spin_unlock(&dir->i_lock);
806}
807
808struct nfs4_opendata {
809 struct kref kref;
810 struct nfs_openargs o_arg;
811 struct nfs_openres o_res;
812 struct nfs_open_confirmargs c_arg;
813 struct nfs_open_confirmres c_res;
814 struct nfs4_string owner_name;
815 struct nfs4_string group_name;
816 struct nfs_fattr f_attr;
817 struct dentry *dir;
818 struct dentry *dentry;
819 struct nfs4_state_owner *owner;
820 struct nfs4_state *state;
821 struct iattr attrs;
822 unsigned long timestamp;
823 unsigned int rpc_done : 1;
824 int rpc_status;
825 int cancelled;
826};
827
828
829static void nfs4_init_opendata_res(struct nfs4_opendata *p)
830{
831 p->o_res.f_attr = &p->f_attr;
832 p->o_res.seqid = p->o_arg.seqid;
833 p->c_res.seqid = p->c_arg.seqid;
834 p->o_res.server = p->o_arg.server;
835 nfs_fattr_init(&p->f_attr);
836 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
837}
838
839static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
840 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
841 const struct iattr *attrs,
842 gfp_t gfp_mask)
843{
844 struct dentry *parent = dget_parent(dentry);
845 struct inode *dir = parent->d_inode;
846 struct nfs_server *server = NFS_SERVER(dir);
847 struct nfs4_opendata *p;
848
849 p = kzalloc(sizeof(*p), gfp_mask);
850 if (p == NULL)
851 goto err;
852 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
853 if (p->o_arg.seqid == NULL)
854 goto err_free;
855 nfs_sb_active(dentry->d_sb);
856 p->dentry = dget(dentry);
857 p->dir = parent;
858 p->owner = sp;
859 atomic_inc(&sp->so_count);
860 p->o_arg.fh = NFS_FH(dir);
861 p->o_arg.open_flags = flags;
862 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
863 p->o_arg.clientid = server->nfs_client->cl_clientid;
864 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
865 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
866 p->o_arg.name = &dentry->d_name;
867 p->o_arg.server = server;
868 p->o_arg.bitmask = server->attr_bitmask;
869 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
870 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
871 if (attrs != NULL && attrs->ia_valid != 0) {
872 __be32 verf[2];
873
874 p->o_arg.u.attrs = &p->attrs;
875 memcpy(&p->attrs, attrs, sizeof(p->attrs));
876
877 verf[0] = jiffies;
878 verf[1] = current->pid;
879 memcpy(p->o_arg.u.verifier.data, verf,
880 sizeof(p->o_arg.u.verifier.data));
881 }
882 p->c_arg.fh = &p->o_res.fh;
883 p->c_arg.stateid = &p->o_res.stateid;
884 p->c_arg.seqid = p->o_arg.seqid;
885 nfs4_init_opendata_res(p);
886 kref_init(&p->kref);
887 return p;
888err_free:
889 kfree(p);
890err:
891 dput(parent);
892 return NULL;
893}
894
895static void nfs4_opendata_free(struct kref *kref)
896{
897 struct nfs4_opendata *p = container_of(kref,
898 struct nfs4_opendata, kref);
899 struct super_block *sb = p->dentry->d_sb;
900
901 nfs_free_seqid(p->o_arg.seqid);
902 if (p->state != NULL)
903 nfs4_put_open_state(p->state);
904 nfs4_put_state_owner(p->owner);
905 dput(p->dir);
906 dput(p->dentry);
907 nfs_sb_deactive(sb);
908 nfs_fattr_free_names(&p->f_attr);
909 kfree(p);
910}
911
912static void nfs4_opendata_put(struct nfs4_opendata *p)
913{
914 if (p != NULL)
915 kref_put(&p->kref, nfs4_opendata_free);
916}
917
918static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
919{
920 int ret;
921
922 ret = rpc_wait_for_completion_task(task);
923 return ret;
924}
925
926static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
927{
928 int ret = 0;
929
930 if (open_mode & (O_EXCL|O_TRUNC))
931 goto out;
932 switch (mode & (FMODE_READ|FMODE_WRITE)) {
933 case FMODE_READ:
934 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
935 && state->n_rdonly != 0;
936 break;
937 case FMODE_WRITE:
938 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
939 && state->n_wronly != 0;
940 break;
941 case FMODE_READ|FMODE_WRITE:
942 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
943 && state->n_rdwr != 0;
944 }
945out:
946 return ret;
947}
948
949static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
950{
951 if (delegation == NULL)
952 return 0;
953 if ((delegation->type & fmode) != fmode)
954 return 0;
955 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
956 return 0;
957 nfs_mark_delegation_referenced(delegation);
958 return 1;
959}
960
961static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
962{
963 switch (fmode) {
964 case FMODE_WRITE:
965 state->n_wronly++;
966 break;
967 case FMODE_READ:
968 state->n_rdonly++;
969 break;
970 case FMODE_READ|FMODE_WRITE:
971 state->n_rdwr++;
972 }
973 nfs4_state_set_mode_locked(state, state->state | fmode);
974}
975
976static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
977{
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
981 switch (fmode) {
982 case FMODE_READ:
983 set_bit(NFS_O_RDONLY_STATE, &state->flags);
984 break;
985 case FMODE_WRITE:
986 set_bit(NFS_O_WRONLY_STATE, &state->flags);
987 break;
988 case FMODE_READ|FMODE_WRITE:
989 set_bit(NFS_O_RDWR_STATE, &state->flags);
990 }
991}
992
993static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
994{
995 write_seqlock(&state->seqlock);
996 nfs_set_open_stateid_locked(state, stateid, fmode);
997 write_sequnlock(&state->seqlock);
998}
999
1000static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1001{
1002 /*
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1005 */
1006 write_seqlock(&state->seqlock);
1007 if (deleg_stateid != NULL) {
1008 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1009 set_bit(NFS_DELEGATED_STATE, &state->flags);
1010 }
1011 if (open_stateid != NULL)
1012 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1013 write_sequnlock(&state->seqlock);
1014 spin_lock(&state->owner->so_lock);
1015 update_open_stateflags(state, fmode);
1016 spin_unlock(&state->owner->so_lock);
1017}
1018
1019static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1020{
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *deleg_cur;
1023 int ret = 0;
1024
1025 fmode &= (FMODE_READ|FMODE_WRITE);
1026
1027 rcu_read_lock();
1028 deleg_cur = rcu_dereference(nfsi->delegation);
1029 if (deleg_cur == NULL)
1030 goto no_delegation;
1031
1032 spin_lock(&deleg_cur->lock);
1033 if (nfsi->delegation != deleg_cur ||
1034 (deleg_cur->type & fmode) != fmode)
1035 goto no_delegation_unlock;
1036
1037 if (delegation == NULL)
1038 delegation = &deleg_cur->stateid;
1039 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1040 goto no_delegation_unlock;
1041
1042 nfs_mark_delegation_referenced(deleg_cur);
1043 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1044 ret = 1;
1045no_delegation_unlock:
1046 spin_unlock(&deleg_cur->lock);
1047no_delegation:
1048 rcu_read_unlock();
1049
1050 if (!ret && open_stateid != NULL) {
1051 __update_open_stateid(state, open_stateid, NULL, fmode);
1052 ret = 1;
1053 }
1054
1055 return ret;
1056}
1057
1058
1059static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1060{
1061 struct nfs_delegation *delegation;
1062
1063 rcu_read_lock();
1064 delegation = rcu_dereference(NFS_I(inode)->delegation);
1065 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1066 rcu_read_unlock();
1067 return;
1068 }
1069 rcu_read_unlock();
1070 nfs4_inode_return_delegation(inode);
1071}
1072
1073static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1074{
1075 struct nfs4_state *state = opendata->state;
1076 struct nfs_inode *nfsi = NFS_I(state->inode);
1077 struct nfs_delegation *delegation;
1078 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1079 fmode_t fmode = opendata->o_arg.fmode;
1080 nfs4_stateid stateid;
1081 int ret = -EAGAIN;
1082
1083 for (;;) {
1084 if (can_open_cached(state, fmode, open_mode)) {
1085 spin_lock(&state->owner->so_lock);
1086 if (can_open_cached(state, fmode, open_mode)) {
1087 update_open_stateflags(state, fmode);
1088 spin_unlock(&state->owner->so_lock);
1089 goto out_return_state;
1090 }
1091 spin_unlock(&state->owner->so_lock);
1092 }
1093 rcu_read_lock();
1094 delegation = rcu_dereference(nfsi->delegation);
1095 if (!can_open_delegated(delegation, fmode)) {
1096 rcu_read_unlock();
1097 break;
1098 }
1099 /* Save the delegation */
1100 nfs4_stateid_copy(&stateid, &delegation->stateid);
1101 rcu_read_unlock();
1102 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1103 if (ret != 0)
1104 goto out;
1105 ret = -EAGAIN;
1106
1107 /* Try to update the stateid using the delegation */
1108 if (update_open_stateid(state, NULL, &stateid, fmode))
1109 goto out_return_state;
1110 }
1111out:
1112 return ERR_PTR(ret);
1113out_return_state:
1114 atomic_inc(&state->count);
1115 return state;
1116}
1117
1118static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1119{
1120 struct inode *inode;
1121 struct nfs4_state *state = NULL;
1122 struct nfs_delegation *delegation;
1123 int ret;
1124
1125 if (!data->rpc_done) {
1126 state = nfs4_try_open_cached(data);
1127 goto out;
1128 }
1129
1130 ret = -EAGAIN;
1131 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1132 goto err;
1133 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1134 ret = PTR_ERR(inode);
1135 if (IS_ERR(inode))
1136 goto err;
1137 ret = -ENOMEM;
1138 state = nfs4_get_open_state(inode, data->owner);
1139 if (state == NULL)
1140 goto err_put_inode;
1141 if (data->o_res.delegation_type != 0) {
1142 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1143 int delegation_flags = 0;
1144
1145 rcu_read_lock();
1146 delegation = rcu_dereference(NFS_I(inode)->delegation);
1147 if (delegation)
1148 delegation_flags = delegation->flags;
1149 rcu_read_unlock();
1150 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1151 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1152 "returning a delegation for "
1153 "OPEN(CLAIM_DELEGATE_CUR)\n",
1154 clp->cl_hostname);
1155 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1156 nfs_inode_set_delegation(state->inode,
1157 data->owner->so_cred,
1158 &data->o_res);
1159 else
1160 nfs_inode_reclaim_delegation(state->inode,
1161 data->owner->so_cred,
1162 &data->o_res);
1163 }
1164
1165 update_open_stateid(state, &data->o_res.stateid, NULL,
1166 data->o_arg.fmode);
1167 iput(inode);
1168out:
1169 return state;
1170err_put_inode:
1171 iput(inode);
1172err:
1173 return ERR_PTR(ret);
1174}
1175
1176static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1177{
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1180
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1184 continue;
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1187 return ctx;
1188 }
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1191}
1192
1193static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1194{
1195 struct nfs4_opendata *opendata;
1196
1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1202 return opendata;
1203}
1204
1205static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1206{
1207 struct nfs4_state *newstate;
1208 int ret;
1209
1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
1215 ret = _nfs4_recover_proc_open(opendata);
1216 if (ret != 0)
1217 return ret;
1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
1221 nfs4_close_state(newstate, fmode);
1222 *res = newstate;
1223 return 0;
1224}
1225
1226static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1227{
1228 struct nfs4_state *newstate;
1229 int ret;
1230
1231 /* memory barrier prior to reading state->n_* */
1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1233 smp_rmb();
1234 if (state->n_rdwr != 0) {
1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1237 if (ret != 0)
1238 return ret;
1239 if (newstate != state)
1240 return -ESTALE;
1241 }
1242 if (state->n_wronly != 0) {
1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1245 if (ret != 0)
1246 return ret;
1247 if (newstate != state)
1248 return -ESTALE;
1249 }
1250 if (state->n_rdonly != 0) {
1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1253 if (ret != 0)
1254 return ret;
1255 if (newstate != state)
1256 return -ESTALE;
1257 }
1258 /*
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1261 */
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1264 write_seqlock(&state->seqlock);
1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1267 write_sequnlock(&state->seqlock);
1268 }
1269 return 0;
1270}
1271
1272/*
1273 * OPEN_RECLAIM:
1274 * reclaim state on the server after a reboot.
1275 */
1276static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1277{
1278 struct nfs_delegation *delegation;
1279 struct nfs4_opendata *opendata;
1280 fmode_t delegation_type = 0;
1281 int status;
1282
1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1291 delegation_type = delegation->type;
1292 rcu_read_unlock();
1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
1295 nfs4_opendata_put(opendata);
1296 return status;
1297}
1298
1299static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1300{
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1303 int err;
1304 do {
1305 err = _nfs4_do_open_reclaim(ctx, state);
1306 if (err != -NFS4ERR_DELAY)
1307 break;
1308 nfs4_handle_exception(server, err, &exception);
1309 } while (exception.retry);
1310 return err;
1311}
1312
1313static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1314{
1315 struct nfs_open_context *ctx;
1316 int ret;
1317
1318 ctx = nfs4_state_find_open_context(state);
1319 if (IS_ERR(ctx))
1320 return PTR_ERR(ctx);
1321 ret = nfs4_do_open_reclaim(ctx, state);
1322 put_nfs_open_context(ctx);
1323 return ret;
1324}
1325
1326static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1327{
1328 struct nfs4_opendata *opendata;
1329 int ret;
1330
1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1336 ret = nfs4_open_recover(opendata, state);
1337 nfs4_opendata_put(opendata);
1338 return ret;
1339}
1340
1341int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1342{
1343 struct nfs4_exception exception = { };
1344 struct nfs_server *server = NFS_SERVER(state->inode);
1345 int err;
1346 do {
1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1348 switch (err) {
1349 case 0:
1350 case -ENOENT:
1351 case -ESTALE:
1352 goto out;
1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
1358 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1359 goto out;
1360 case -NFS4ERR_STALE_CLIENTID:
1361 case -NFS4ERR_STALE_STATEID:
1362 case -NFS4ERR_EXPIRED:
1363 /* Don't recall a delegation if it was lost */
1364 nfs4_schedule_lease_recovery(server->nfs_client);
1365 goto out;
1366 case -ERESTARTSYS:
1367 /*
1368 * The show must go on: exit, but mark the
1369 * stateid as needing recovery.
1370 */
1371 case -NFS4ERR_DELEG_REVOKED:
1372 case -NFS4ERR_ADMIN_REVOKED:
1373 case -NFS4ERR_BAD_STATEID:
1374 nfs_inode_find_state_and_recover(state->inode,
1375 stateid);
1376 nfs4_schedule_stateid_recovery(server, state);
1377 case -EKEYEXPIRED:
1378 /*
1379 * User RPCSEC_GSS context has expired.
1380 * We cannot recover this stateid now, so
1381 * skip it and allow recovery thread to
1382 * proceed.
1383 */
1384 case -ENOMEM:
1385 err = 0;
1386 goto out;
1387 }
1388 err = nfs4_handle_exception(server, err, &exception);
1389 } while (exception.retry);
1390out:
1391 return err;
1392}
1393
1394static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1395{
1396 struct nfs4_opendata *data = calldata;
1397
1398 data->rpc_status = task->tk_status;
1399 if (data->rpc_status == 0) {
1400 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1401 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1402 renew_lease(data->o_res.server, data->timestamp);
1403 data->rpc_done = 1;
1404 }
1405}
1406
1407static void nfs4_open_confirm_release(void *calldata)
1408{
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1411
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1414 goto out_free;
1415 /* In case of error, no cleanup! */
1416 if (!data->rpc_done)
1417 goto out_free;
1418 state = nfs4_opendata_to_nfs4_state(data);
1419 if (!IS_ERR(state))
1420 nfs4_close_state(state, data->o_arg.fmode);
1421out_free:
1422 nfs4_opendata_put(data);
1423}
1424
1425static const struct rpc_call_ops nfs4_open_confirm_ops = {
1426 .rpc_call_done = nfs4_open_confirm_done,
1427 .rpc_release = nfs4_open_confirm_release,
1428};
1429
1430/*
1431 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1432 */
1433static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1434{
1435 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1436 struct rpc_task *task;
1437 struct rpc_message msg = {
1438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1439 .rpc_argp = &data->c_arg,
1440 .rpc_resp = &data->c_res,
1441 .rpc_cred = data->owner->so_cred,
1442 };
1443 struct rpc_task_setup task_setup_data = {
1444 .rpc_client = server->client,
1445 .rpc_message = &msg,
1446 .callback_ops = &nfs4_open_confirm_ops,
1447 .callback_data = data,
1448 .workqueue = nfsiod_workqueue,
1449 .flags = RPC_TASK_ASYNC,
1450 };
1451 int status;
1452
1453 kref_get(&data->kref);
1454 data->rpc_done = 0;
1455 data->rpc_status = 0;
1456 data->timestamp = jiffies;
1457 task = rpc_run_task(&task_setup_data);
1458 if (IS_ERR(task))
1459 return PTR_ERR(task);
1460 status = nfs4_wait_for_completion_rpc_task(task);
1461 if (status != 0) {
1462 data->cancelled = 1;
1463 smp_wmb();
1464 } else
1465 status = data->rpc_status;
1466 rpc_put_task(task);
1467 return status;
1468}
1469
1470static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1471{
1472 struct nfs4_opendata *data = calldata;
1473 struct nfs4_state_owner *sp = data->owner;
1474
1475 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1476 return;
1477 /*
1478 * Check if we still need to send an OPEN call, or if we can use
1479 * a delegation instead.
1480 */
1481 if (data->state != NULL) {
1482 struct nfs_delegation *delegation;
1483
1484 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1485 goto out_no_action;
1486 rcu_read_lock();
1487 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1488 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1489 can_open_delegated(delegation, data->o_arg.fmode))
1490 goto unlock_no_action;
1491 rcu_read_unlock();
1492 }
1493 /* Update client id. */
1494 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1495 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1496 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1497 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1498 }
1499 data->timestamp = jiffies;
1500 if (nfs4_setup_sequence(data->o_arg.server,
1501 &data->o_arg.seq_args,
1502 &data->o_res.seq_res, task))
1503 return;
1504 rpc_call_start(task);
1505 return;
1506unlock_no_action:
1507 rcu_read_unlock();
1508out_no_action:
1509 task->tk_action = NULL;
1510
1511}
1512
1513static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1514{
1515 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1516 nfs4_open_prepare(task, calldata);
1517}
1518
1519static void nfs4_open_done(struct rpc_task *task, void *calldata)
1520{
1521 struct nfs4_opendata *data = calldata;
1522
1523 data->rpc_status = task->tk_status;
1524
1525 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1526 return;
1527
1528 if (task->tk_status == 0) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
1530 case S_IFREG:
1531 break;
1532 case S_IFLNK:
1533 data->rpc_status = -ELOOP;
1534 break;
1535 case S_IFDIR:
1536 data->rpc_status = -EISDIR;
1537 break;
1538 default:
1539 data->rpc_status = -ENOTDIR;
1540 }
1541 renew_lease(data->o_res.server, data->timestamp);
1542 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1543 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1544 }
1545 data->rpc_done = 1;
1546}
1547
1548static void nfs4_open_release(void *calldata)
1549{
1550 struct nfs4_opendata *data = calldata;
1551 struct nfs4_state *state = NULL;
1552
1553 /* If this request hasn't been cancelled, do nothing */
1554 if (data->cancelled == 0)
1555 goto out_free;
1556 /* In case of error, no cleanup! */
1557 if (data->rpc_status != 0 || !data->rpc_done)
1558 goto out_free;
1559 /* In case we need an open_confirm, no cleanup! */
1560 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1561 goto out_free;
1562 state = nfs4_opendata_to_nfs4_state(data);
1563 if (!IS_ERR(state))
1564 nfs4_close_state(state, data->o_arg.fmode);
1565out_free:
1566 nfs4_opendata_put(data);
1567}
1568
1569static const struct rpc_call_ops nfs4_open_ops = {
1570 .rpc_call_prepare = nfs4_open_prepare,
1571 .rpc_call_done = nfs4_open_done,
1572 .rpc_release = nfs4_open_release,
1573};
1574
1575static const struct rpc_call_ops nfs4_recover_open_ops = {
1576 .rpc_call_prepare = nfs4_recover_open_prepare,
1577 .rpc_call_done = nfs4_open_done,
1578 .rpc_release = nfs4_open_release,
1579};
1580
1581static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1582{
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1587 struct rpc_task *task;
1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1590 .rpc_argp = o_arg,
1591 .rpc_resp = o_res,
1592 .rpc_cred = data->owner->so_cred,
1593 };
1594 struct rpc_task_setup task_setup_data = {
1595 .rpc_client = server->client,
1596 .rpc_message = &msg,
1597 .callback_ops = &nfs4_open_ops,
1598 .callback_data = data,
1599 .workqueue = nfsiod_workqueue,
1600 .flags = RPC_TASK_ASYNC,
1601 };
1602 int status;
1603
1604 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1605 kref_get(&data->kref);
1606 data->rpc_done = 0;
1607 data->rpc_status = 0;
1608 data->cancelled = 0;
1609 if (isrecover)
1610 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1611 task = rpc_run_task(&task_setup_data);
1612 if (IS_ERR(task))
1613 return PTR_ERR(task);
1614 status = nfs4_wait_for_completion_rpc_task(task);
1615 if (status != 0) {
1616 data->cancelled = 1;
1617 smp_wmb();
1618 } else
1619 status = data->rpc_status;
1620 rpc_put_task(task);
1621
1622 return status;
1623}
1624
1625static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1626{
1627 struct inode *dir = data->dir->d_inode;
1628 struct nfs_openres *o_res = &data->o_res;
1629 int status;
1630
1631 status = nfs4_run_open_task(data, 1);
1632 if (status != 0 || !data->rpc_done)
1633 return status;
1634
1635 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1636
1637 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1638 status = _nfs4_proc_open_confirm(data);
1639 if (status != 0)
1640 return status;
1641 }
1642
1643 return status;
1644}
1645
1646/*
1647 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1648 */
1649static int _nfs4_proc_open(struct nfs4_opendata *data)
1650{
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1655 int status;
1656
1657 status = nfs4_run_open_task(data, 0);
1658 if (!data->rpc_done)
1659 return status;
1660 if (status != 0) {
1661 if (status == -NFS4ERR_BADNAME &&
1662 !(o_arg->open_flags & O_CREAT))
1663 return -ENOENT;
1664 return status;
1665 }
1666
1667 nfs_fattr_map_and_free_names(server, &data->f_attr);
1668
1669 if (o_arg->open_flags & O_CREAT)
1670 update_changeattr(dir, &o_res->cinfo);
1671 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1672 server->caps &= ~NFS_CAP_POSIX_LOCK;
1673 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1674 status = _nfs4_proc_open_confirm(data);
1675 if (status != 0)
1676 return status;
1677 }
1678 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1679 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1680 return 0;
1681}
1682
1683static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1684{
1685 unsigned int loop;
1686 int ret;
1687
1688 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1689 ret = nfs4_wait_clnt_recover(clp);
1690 if (ret != 0)
1691 break;
1692 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1693 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1694 break;
1695 nfs4_schedule_state_manager(clp);
1696 ret = -EIO;
1697 }
1698 return ret;
1699}
1700
1701static int nfs4_recover_expired_lease(struct nfs_server *server)
1702{
1703 return nfs4_client_recover_expired_lease(server->nfs_client);
1704}
1705
1706/*
1707 * OPEN_EXPIRED:
1708 * reclaim state on the server after a network partition.
1709 * Assumes caller holds the appropriate lock
1710 */
1711static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1712{
1713 struct nfs4_opendata *opendata;
1714 int ret;
1715
1716 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1717 if (IS_ERR(opendata))
1718 return PTR_ERR(opendata);
1719 ret = nfs4_open_recover(opendata, state);
1720 if (ret == -ESTALE)
1721 d_drop(ctx->dentry);
1722 nfs4_opendata_put(opendata);
1723 return ret;
1724}
1725
1726static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1727{
1728 struct nfs_server *server = NFS_SERVER(state->inode);
1729 struct nfs4_exception exception = { };
1730 int err;
1731
1732 do {
1733 err = _nfs4_open_expired(ctx, state);
1734 switch (err) {
1735 default:
1736 goto out;
1737 case -NFS4ERR_GRACE:
1738 case -NFS4ERR_DELAY:
1739 nfs4_handle_exception(server, err, &exception);
1740 err = 0;
1741 }
1742 } while (exception.retry);
1743out:
1744 return err;
1745}
1746
1747static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1748{
1749 struct nfs_open_context *ctx;
1750 int ret;
1751
1752 ctx = nfs4_state_find_open_context(state);
1753 if (IS_ERR(ctx))
1754 return PTR_ERR(ctx);
1755 ret = nfs4_do_open_expired(ctx, state);
1756 put_nfs_open_context(ctx);
1757 return ret;
1758}
1759
1760#if defined(CONFIG_NFS_V4_1)
1761static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1762{
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 nfs4_stateid *stateid = &state->stateid;
1765 int status;
1766
1767 /* If a state reset has been done, test_stateid is unneeded */
1768 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1769 return;
1770
1771 status = nfs41_test_stateid(server, stateid);
1772 if (status != NFS_OK) {
1773 /* Free the stateid unless the server explicitly
1774 * informs us the stateid is unrecognized. */
1775 if (status != -NFS4ERR_BAD_STATEID)
1776 nfs41_free_stateid(server, stateid);
1777 nfs_remove_bad_delegation(state->inode);
1778
1779 write_seqlock(&state->seqlock);
1780 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1781 write_sequnlock(&state->seqlock);
1782 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1783 }
1784}
1785
1786/**
1787 * nfs41_check_open_stateid - possibly free an open stateid
1788 *
1789 * @state: NFSv4 state for an inode
1790 *
1791 * Returns NFS_OK if recovery for this stateid is now finished.
1792 * Otherwise a negative NFS4ERR value is returned.
1793 */
1794static int nfs41_check_open_stateid(struct nfs4_state *state)
1795{
1796 struct nfs_server *server = NFS_SERVER(state->inode);
1797 nfs4_stateid *stateid = &state->open_stateid;
1798 int status;
1799
1800 /* If a state reset has been done, test_stateid is unneeded */
1801 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1802 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1803 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1804 return -NFS4ERR_BAD_STATEID;
1805
1806 status = nfs41_test_stateid(server, stateid);
1807 if (status != NFS_OK) {
1808 /* Free the stateid unless the server explicitly
1809 * informs us the stateid is unrecognized. */
1810 if (status != -NFS4ERR_BAD_STATEID)
1811 nfs41_free_stateid(server, stateid);
1812
1813 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1814 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1815 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1816 }
1817 return status;
1818}
1819
1820static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1821{
1822 int status;
1823
1824 nfs41_clear_delegation_stateid(state);
1825 status = nfs41_check_open_stateid(state);
1826 if (status != NFS_OK)
1827 status = nfs4_open_expired(sp, state);
1828 return status;
1829}
1830#endif
1831
1832/*
1833 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1834 * fields corresponding to attributes that were used to store the verifier.
1835 * Make sure we clobber those fields in the later setattr call
1836 */
1837static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1838{
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1840 !(sattr->ia_valid & ATTR_ATIME_SET))
1841 sattr->ia_valid |= ATTR_ATIME;
1842
1843 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1844 !(sattr->ia_valid & ATTR_MTIME_SET))
1845 sattr->ia_valid |= ATTR_MTIME;
1846}
1847
1848/*
1849 * Returns a referenced nfs4_state
1850 */
1851static int _nfs4_do_open(struct inode *dir,
1852 struct dentry *dentry,
1853 fmode_t fmode,
1854 int flags,
1855 struct iattr *sattr,
1856 struct rpc_cred *cred,
1857 struct nfs4_state **res,
1858 struct nfs4_threshold **ctx_th)
1859{
1860 struct nfs4_state_owner *sp;
1861 struct nfs4_state *state = NULL;
1862 struct nfs_server *server = NFS_SERVER(dir);
1863 struct nfs4_opendata *opendata;
1864 int status;
1865
1866 /* Protect against reboot recovery conflicts */
1867 status = -ENOMEM;
1868 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1869 if (sp == NULL) {
1870 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1871 goto out_err;
1872 }
1873 status = nfs4_recover_expired_lease(server);
1874 if (status != 0)
1875 goto err_put_state_owner;
1876 if (dentry->d_inode != NULL)
1877 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1878 status = -ENOMEM;
1879 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1880 if (opendata == NULL)
1881 goto err_put_state_owner;
1882
1883 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1884 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1885 if (!opendata->f_attr.mdsthreshold)
1886 goto err_opendata_put;
1887 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1888 }
1889 if (dentry->d_inode != NULL)
1890 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1891
1892 status = _nfs4_proc_open(opendata);
1893 if (status != 0)
1894 goto err_opendata_put;
1895
1896 state = nfs4_opendata_to_nfs4_state(opendata);
1897 status = PTR_ERR(state);
1898 if (IS_ERR(state))
1899 goto err_opendata_put;
1900 if (server->caps & NFS_CAP_POSIX_LOCK)
1901 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1902
1903 if (opendata->o_arg.open_flags & O_EXCL) {
1904 nfs4_exclusive_attrset(opendata, sattr);
1905
1906 nfs_fattr_init(opendata->o_res.f_attr);
1907 status = nfs4_do_setattr(state->inode, cred,
1908 opendata->o_res.f_attr, sattr,
1909 state);
1910 if (status == 0)
1911 nfs_setattr_update_inode(state->inode, sattr);
1912 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1913 }
1914
1915 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1916 *ctx_th = opendata->f_attr.mdsthreshold;
1917 else
1918 kfree(opendata->f_attr.mdsthreshold);
1919 opendata->f_attr.mdsthreshold = NULL;
1920
1921 nfs4_opendata_put(opendata);
1922 nfs4_put_state_owner(sp);
1923 *res = state;
1924 return 0;
1925err_opendata_put:
1926 kfree(opendata->f_attr.mdsthreshold);
1927 nfs4_opendata_put(opendata);
1928err_put_state_owner:
1929 nfs4_put_state_owner(sp);
1930out_err:
1931 *res = NULL;
1932 return status;
1933}
1934
1935
1936static struct nfs4_state *nfs4_do_open(struct inode *dir,
1937 struct dentry *dentry,
1938 fmode_t fmode,
1939 int flags,
1940 struct iattr *sattr,
1941 struct rpc_cred *cred,
1942 struct nfs4_threshold **ctx_th)
1943{
1944 struct nfs4_exception exception = { };
1945 struct nfs4_state *res;
1946 int status;
1947
1948 fmode &= FMODE_READ|FMODE_WRITE;
1949 do {
1950 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1951 &res, ctx_th);
1952 if (status == 0)
1953 break;
1954 /* NOTE: BAD_SEQID means the server and client disagree about the
1955 * book-keeping w.r.t. state-changing operations
1956 * (OPEN/CLOSE/LOCK/LOCKU...)
1957 * It is actually a sign of a bug on the client or on the server.
1958 *
1959 * If we receive a BAD_SEQID error in the particular case of
1960 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1961 * have unhashed the old state_owner for us, and that we can
1962 * therefore safely retry using a new one. We should still warn
1963 * the user though...
1964 */
1965 if (status == -NFS4ERR_BAD_SEQID) {
1966 pr_warn_ratelimited("NFS: v4 server %s "
1967 " returned a bad sequence-id error!\n",
1968 NFS_SERVER(dir)->nfs_client->cl_hostname);
1969 exception.retry = 1;
1970 continue;
1971 }
1972 /*
1973 * BAD_STATEID on OPEN means that the server cancelled our
1974 * state before it received the OPEN_CONFIRM.
1975 * Recover by retrying the request as per the discussion
1976 * on Page 181 of RFC3530.
1977 */
1978 if (status == -NFS4ERR_BAD_STATEID) {
1979 exception.retry = 1;
1980 continue;
1981 }
1982 if (status == -EAGAIN) {
1983 /* We must have found a delegation */
1984 exception.retry = 1;
1985 continue;
1986 }
1987 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1988 status, &exception));
1989 } while (exception.retry);
1990 return res;
1991}
1992
1993static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1994 struct nfs_fattr *fattr, struct iattr *sattr,
1995 struct nfs4_state *state)
1996{
1997 struct nfs_server *server = NFS_SERVER(inode);
1998 struct nfs_setattrargs arg = {
1999 .fh = NFS_FH(inode),
2000 .iap = sattr,
2001 .server = server,
2002 .bitmask = server->attr_bitmask,
2003 };
2004 struct nfs_setattrres res = {
2005 .fattr = fattr,
2006 .server = server,
2007 };
2008 struct rpc_message msg = {
2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2010 .rpc_argp = &arg,
2011 .rpc_resp = &res,
2012 .rpc_cred = cred,
2013 };
2014 unsigned long timestamp = jiffies;
2015 int status;
2016
2017 nfs_fattr_init(fattr);
2018
2019 if (state != NULL) {
2020 struct nfs_lockowner lockowner = {
2021 .l_owner = current->files,
2022 .l_pid = current->tgid,
2023 };
2024 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2025 &lockowner);
2026 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2027 FMODE_WRITE)) {
2028 /* Use that stateid */
2029 } else
2030 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2031
2032 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2033 if (status == 0 && state != NULL)
2034 renew_lease(server, timestamp);
2035 return status;
2036}
2037
2038static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2039 struct nfs_fattr *fattr, struct iattr *sattr,
2040 struct nfs4_state *state)
2041{
2042 struct nfs_server *server = NFS_SERVER(inode);
2043 struct nfs4_exception exception = {
2044 .state = state,
2045 .inode = inode,
2046 };
2047 int err;
2048 do {
2049 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2050 switch (err) {
2051 case -NFS4ERR_OPENMODE:
2052 if (state && !(state->state & FMODE_WRITE)) {
2053 err = -EBADF;
2054 if (sattr->ia_valid & ATTR_OPEN)
2055 err = -EACCES;
2056 goto out;
2057 }
2058 }
2059 err = nfs4_handle_exception(server, err, &exception);
2060 } while (exception.retry);
2061out:
2062 return err;
2063}
2064
2065struct nfs4_closedata {
2066 struct inode *inode;
2067 struct nfs4_state *state;
2068 struct nfs_closeargs arg;
2069 struct nfs_closeres res;
2070 struct nfs_fattr fattr;
2071 unsigned long timestamp;
2072 bool roc;
2073 u32 roc_barrier;
2074};
2075
2076static void nfs4_free_closedata(void *data)
2077{
2078 struct nfs4_closedata *calldata = data;
2079 struct nfs4_state_owner *sp = calldata->state->owner;
2080 struct super_block *sb = calldata->state->inode->i_sb;
2081
2082 if (calldata->roc)
2083 pnfs_roc_release(calldata->state->inode);
2084 nfs4_put_open_state(calldata->state);
2085 nfs_free_seqid(calldata->arg.seqid);
2086 nfs4_put_state_owner(sp);
2087 nfs_sb_deactive(sb);
2088 kfree(calldata);
2089}
2090
2091static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2092 fmode_t fmode)
2093{
2094 spin_lock(&state->owner->so_lock);
2095 if (!(fmode & FMODE_READ))
2096 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2097 if (!(fmode & FMODE_WRITE))
2098 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2099 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2100 spin_unlock(&state->owner->so_lock);
2101}
2102
2103static void nfs4_close_done(struct rpc_task *task, void *data)
2104{
2105 struct nfs4_closedata *calldata = data;
2106 struct nfs4_state *state = calldata->state;
2107 struct nfs_server *server = NFS_SERVER(calldata->inode);
2108
2109 dprintk("%s: begin!\n", __func__);
2110 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2111 return;
2112 /* hmm. we are done with the inode, and in the process of freeing
2113 * the state_owner. we keep this around to process errors
2114 */
2115 switch (task->tk_status) {
2116 case 0:
2117 if (calldata->roc)
2118 pnfs_roc_set_barrier(state->inode,
2119 calldata->roc_barrier);
2120 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2121 renew_lease(server, calldata->timestamp);
2122 nfs4_close_clear_stateid_flags(state,
2123 calldata->arg.fmode);
2124 break;
2125 case -NFS4ERR_STALE_STATEID:
2126 case -NFS4ERR_OLD_STATEID:
2127 case -NFS4ERR_BAD_STATEID:
2128 case -NFS4ERR_EXPIRED:
2129 if (calldata->arg.fmode == 0)
2130 break;
2131 default:
2132 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2133 rpc_restart_call_prepare(task);
2134 }
2135 nfs_release_seqid(calldata->arg.seqid);
2136 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2137 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2138}
2139
2140static void nfs4_close_prepare(struct rpc_task *task, void *data)
2141{
2142 struct nfs4_closedata *calldata = data;
2143 struct nfs4_state *state = calldata->state;
2144 struct inode *inode = calldata->inode;
2145 int call_close = 0;
2146
2147 dprintk("%s: begin!\n", __func__);
2148 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2149 return;
2150
2151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2152 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2153 spin_lock(&state->owner->so_lock);
2154 /* Calculate the change in open mode */
2155 if (state->n_rdwr == 0) {
2156 if (state->n_rdonly == 0) {
2157 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2158 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2159 calldata->arg.fmode &= ~FMODE_READ;
2160 }
2161 if (state->n_wronly == 0) {
2162 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2163 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2164 calldata->arg.fmode &= ~FMODE_WRITE;
2165 }
2166 }
2167 spin_unlock(&state->owner->so_lock);
2168
2169 if (!call_close) {
2170 /* Note: exit _without_ calling nfs4_close_done */
2171 task->tk_action = NULL;
2172 goto out;
2173 }
2174
2175 if (calldata->arg.fmode == 0) {
2176 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2177 if (calldata->roc &&
2178 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2179 goto out;
2180 }
2181
2182 nfs_fattr_init(calldata->res.fattr);
2183 calldata->timestamp = jiffies;
2184 if (nfs4_setup_sequence(NFS_SERVER(inode),
2185 &calldata->arg.seq_args,
2186 &calldata->res.seq_res,
2187 task))
2188 goto out;
2189 rpc_call_start(task);
2190out:
2191 dprintk("%s: done!\n", __func__);
2192}
2193
2194static const struct rpc_call_ops nfs4_close_ops = {
2195 .rpc_call_prepare = nfs4_close_prepare,
2196 .rpc_call_done = nfs4_close_done,
2197 .rpc_release = nfs4_free_closedata,
2198};
2199
2200/*
2201 * It is possible for data to be read/written from a mem-mapped file
2202 * after the sys_close call (which hits the vfs layer as a flush).
2203 * This means that we can't safely call nfsv4 close on a file until
2204 * the inode is cleared. This in turn means that we are not good
2205 * NFSv4 citizens - we do not indicate to the server to update the file's
2206 * share state even when we are done with one of the three share
2207 * stateid's in the inode.
2208 *
2209 * NOTE: Caller must be holding the sp->so_owner semaphore!
2210 */
2211int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2212{
2213 struct nfs_server *server = NFS_SERVER(state->inode);
2214 struct nfs4_closedata *calldata;
2215 struct nfs4_state_owner *sp = state->owner;
2216 struct rpc_task *task;
2217 struct rpc_message msg = {
2218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2219 .rpc_cred = state->owner->so_cred,
2220 };
2221 struct rpc_task_setup task_setup_data = {
2222 .rpc_client = server->client,
2223 .rpc_message = &msg,
2224 .callback_ops = &nfs4_close_ops,
2225 .workqueue = nfsiod_workqueue,
2226 .flags = RPC_TASK_ASYNC,
2227 };
2228 int status = -ENOMEM;
2229
2230 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2231 if (calldata == NULL)
2232 goto out;
2233 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2234 calldata->inode = state->inode;
2235 calldata->state = state;
2236 calldata->arg.fh = NFS_FH(state->inode);
2237 calldata->arg.stateid = &state->open_stateid;
2238 /* Serialization for the sequence id */
2239 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2240 if (calldata->arg.seqid == NULL)
2241 goto out_free_calldata;
2242 calldata->arg.fmode = 0;
2243 calldata->arg.bitmask = server->cache_consistency_bitmask;
2244 calldata->res.fattr = &calldata->fattr;
2245 calldata->res.seqid = calldata->arg.seqid;
2246 calldata->res.server = server;
2247 calldata->roc = pnfs_roc(state->inode);
2248 nfs_sb_active(calldata->inode->i_sb);
2249
2250 msg.rpc_argp = &calldata->arg;
2251 msg.rpc_resp = &calldata->res;
2252 task_setup_data.callback_data = calldata;
2253 task = rpc_run_task(&task_setup_data);
2254 if (IS_ERR(task))
2255 return PTR_ERR(task);
2256 status = 0;
2257 if (wait)
2258 status = rpc_wait_for_completion_task(task);
2259 rpc_put_task(task);
2260 return status;
2261out_free_calldata:
2262 kfree(calldata);
2263out:
2264 nfs4_put_open_state(state);
2265 nfs4_put_state_owner(sp);
2266 return status;
2267}
2268
2269static struct inode *
2270nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2271{
2272 struct nfs4_state *state;
2273
2274 /* Protect against concurrent sillydeletes */
2275 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2276 ctx->cred, &ctx->mdsthreshold);
2277 if (IS_ERR(state))
2278 return ERR_CAST(state);
2279 ctx->state = state;
2280 return igrab(state->inode);
2281}
2282
2283static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2284{
2285 if (ctx->state == NULL)
2286 return;
2287 if (is_sync)
2288 nfs4_close_sync(ctx->state, ctx->mode);
2289 else
2290 nfs4_close_state(ctx->state, ctx->mode);
2291}
2292
2293static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2294{
2295 struct nfs4_server_caps_arg args = {
2296 .fhandle = fhandle,
2297 };
2298 struct nfs4_server_caps_res res = {};
2299 struct rpc_message msg = {
2300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2301 .rpc_argp = &args,
2302 .rpc_resp = &res,
2303 };
2304 int status;
2305
2306 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2307 if (status == 0) {
2308 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2309 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2310 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2311 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2312 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2313 NFS_CAP_CTIME|NFS_CAP_MTIME);
2314 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2315 server->caps |= NFS_CAP_ACLS;
2316 if (res.has_links != 0)
2317 server->caps |= NFS_CAP_HARDLINKS;
2318 if (res.has_symlinks != 0)
2319 server->caps |= NFS_CAP_SYMLINKS;
2320 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2321 server->caps |= NFS_CAP_FILEID;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2323 server->caps |= NFS_CAP_MODE;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2325 server->caps |= NFS_CAP_NLINK;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2327 server->caps |= NFS_CAP_OWNER;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2329 server->caps |= NFS_CAP_OWNER_GROUP;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2331 server->caps |= NFS_CAP_ATIME;
2332 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2333 server->caps |= NFS_CAP_CTIME;
2334 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2335 server->caps |= NFS_CAP_MTIME;
2336
2337 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2338 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2339 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2340 server->acl_bitmask = res.acl_bitmask;
2341 server->fh_expire_type = res.fh_expire_type;
2342 }
2343
2344 return status;
2345}
2346
2347int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2348{
2349 struct nfs4_exception exception = { };
2350 int err;
2351 do {
2352 err = nfs4_handle_exception(server,
2353 _nfs4_server_capabilities(server, fhandle),
2354 &exception);
2355 } while (exception.retry);
2356 return err;
2357}
2358
2359static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2360 struct nfs_fsinfo *info)
2361{
2362 struct nfs4_lookup_root_arg args = {
2363 .bitmask = nfs4_fattr_bitmap,
2364 };
2365 struct nfs4_lookup_res res = {
2366 .server = server,
2367 .fattr = info->fattr,
2368 .fh = fhandle,
2369 };
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2372 .rpc_argp = &args,
2373 .rpc_resp = &res,
2374 };
2375
2376 nfs_fattr_init(info->fattr);
2377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2378}
2379
2380static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_fsinfo *info)
2382{
2383 struct nfs4_exception exception = { };
2384 int err;
2385 do {
2386 err = _nfs4_lookup_root(server, fhandle, info);
2387 switch (err) {
2388 case 0:
2389 case -NFS4ERR_WRONGSEC:
2390 goto out;
2391 default:
2392 err = nfs4_handle_exception(server, err, &exception);
2393 }
2394 } while (exception.retry);
2395out:
2396 return err;
2397}
2398
2399static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2401{
2402 struct rpc_auth *auth;
2403 int ret;
2404
2405 auth = rpcauth_create(flavor, server->client);
2406 if (IS_ERR(auth)) {
2407 ret = -EIO;
2408 goto out;
2409 }
2410 ret = nfs4_lookup_root(server, fhandle, info);
2411out:
2412 return ret;
2413}
2414
2415static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2416 struct nfs_fsinfo *info)
2417{
2418 int i, len, status = 0;
2419 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2420
2421 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2422 BUG_ON(len < 0);
2423
2424 for (i = 0; i < len; i++) {
2425 /* AUTH_UNIX is the default flavor if none was specified,
2426 * thus has already been tried. */
2427 if (flav_array[i] == RPC_AUTH_UNIX)
2428 continue;
2429
2430 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2431 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2432 continue;
2433 break;
2434 }
2435 /*
2436 * -EACCESS could mean that the user doesn't have correct permissions
2437 * to access the mount. It could also mean that we tried to mount
2438 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2439 * existing mount programs don't handle -EACCES very well so it should
2440 * be mapped to -EPERM instead.
2441 */
2442 if (status == -EACCES)
2443 status = -EPERM;
2444 return status;
2445}
2446
2447/*
2448 * get the file handle for the "/" directory on the server
2449 */
2450int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2451 struct nfs_fsinfo *info)
2452{
2453 int minor_version = server->nfs_client->cl_minorversion;
2454 int status = nfs4_lookup_root(server, fhandle, info);
2455 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2456 /*
2457 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2458 * by nfs4_map_errors() as this function exits.
2459 */
2460 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2461 if (status == 0)
2462 status = nfs4_server_capabilities(server, fhandle);
2463 if (status == 0)
2464 status = nfs4_do_fsinfo(server, fhandle, info);
2465 return nfs4_map_errors(status);
2466}
2467
2468static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2469 struct nfs_fsinfo *info)
2470{
2471 int error;
2472 struct nfs_fattr *fattr = info->fattr;
2473
2474 error = nfs4_server_capabilities(server, mntfh);
2475 if (error < 0) {
2476 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2477 return error;
2478 }
2479
2480 error = nfs4_proc_getattr(server, mntfh, fattr);
2481 if (error < 0) {
2482 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2483 return error;
2484 }
2485
2486 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2487 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2488 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2489
2490 return error;
2491}
2492
2493/*
2494 * Get locations and (maybe) other attributes of a referral.
2495 * Note that we'll actually follow the referral later when
2496 * we detect fsid mismatch in inode revalidation
2497 */
2498static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2499 const struct qstr *name, struct nfs_fattr *fattr,
2500 struct nfs_fh *fhandle)
2501{
2502 int status = -ENOMEM;
2503 struct page *page = NULL;
2504 struct nfs4_fs_locations *locations = NULL;
2505
2506 page = alloc_page(GFP_KERNEL);
2507 if (page == NULL)
2508 goto out;
2509 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2510 if (locations == NULL)
2511 goto out;
2512
2513 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2514 if (status != 0)
2515 goto out;
2516 /* Make sure server returned a different fsid for the referral */
2517 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2518 dprintk("%s: server did not return a different fsid for"
2519 " a referral at %s\n", __func__, name->name);
2520 status = -EIO;
2521 goto out;
2522 }
2523 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2524 nfs_fixup_referral_attributes(&locations->fattr);
2525
2526 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2527 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2528 memset(fhandle, 0, sizeof(struct nfs_fh));
2529out:
2530 if (page)
2531 __free_page(page);
2532 kfree(locations);
2533 return status;
2534}
2535
2536static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2537{
2538 struct nfs4_getattr_arg args = {
2539 .fh = fhandle,
2540 .bitmask = server->attr_bitmask,
2541 };
2542 struct nfs4_getattr_res res = {
2543 .fattr = fattr,
2544 .server = server,
2545 };
2546 struct rpc_message msg = {
2547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2548 .rpc_argp = &args,
2549 .rpc_resp = &res,
2550 };
2551
2552 nfs_fattr_init(fattr);
2553 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2554}
2555
2556static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2557{
2558 struct nfs4_exception exception = { };
2559 int err;
2560 do {
2561 err = nfs4_handle_exception(server,
2562 _nfs4_proc_getattr(server, fhandle, fattr),
2563 &exception);
2564 } while (exception.retry);
2565 return err;
2566}
2567
2568/*
2569 * The file is not closed if it is opened due to the a request to change
2570 * the size of the file. The open call will not be needed once the
2571 * VFS layer lookup-intents are implemented.
2572 *
2573 * Close is called when the inode is destroyed.
2574 * If we haven't opened the file for O_WRONLY, we
2575 * need to in the size_change case to obtain a stateid.
2576 *
2577 * Got race?
2578 * Because OPEN is always done by name in nfsv4, it is
2579 * possible that we opened a different file by the same
2580 * name. We can recognize this race condition, but we
2581 * can't do anything about it besides returning an error.
2582 *
2583 * This will be fixed with VFS changes (lookup-intent).
2584 */
2585static int
2586nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2587 struct iattr *sattr)
2588{
2589 struct inode *inode = dentry->d_inode;
2590 struct rpc_cred *cred = NULL;
2591 struct nfs4_state *state = NULL;
2592 int status;
2593
2594 if (pnfs_ld_layoutret_on_setattr(inode))
2595 pnfs_return_layout(inode);
2596
2597 nfs_fattr_init(fattr);
2598
2599 /* Deal with open(O_TRUNC) */
2600 if (sattr->ia_valid & ATTR_OPEN)
2601 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2602
2603 /* Optimization: if the end result is no change, don't RPC */
2604 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2605 return 0;
2606
2607 /* Search for an existing open(O_WRITE) file */
2608 if (sattr->ia_valid & ATTR_FILE) {
2609 struct nfs_open_context *ctx;
2610
2611 ctx = nfs_file_open_context(sattr->ia_file);
2612 if (ctx) {
2613 cred = ctx->cred;
2614 state = ctx->state;
2615 }
2616 }
2617
2618 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2619 if (status == 0)
2620 nfs_setattr_update_inode(inode, sattr);
2621 return status;
2622}
2623
2624static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2625 const struct qstr *name, struct nfs_fh *fhandle,
2626 struct nfs_fattr *fattr)
2627{
2628 struct nfs_server *server = NFS_SERVER(dir);
2629 int status;
2630 struct nfs4_lookup_arg args = {
2631 .bitmask = server->attr_bitmask,
2632 .dir_fh = NFS_FH(dir),
2633 .name = name,
2634 };
2635 struct nfs4_lookup_res res = {
2636 .server = server,
2637 .fattr = fattr,
2638 .fh = fhandle,
2639 };
2640 struct rpc_message msg = {
2641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2642 .rpc_argp = &args,
2643 .rpc_resp = &res,
2644 };
2645
2646 nfs_fattr_init(fattr);
2647
2648 dprintk("NFS call lookup %s\n", name->name);
2649 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2650 dprintk("NFS reply lookup: %d\n", status);
2651 return status;
2652}
2653
2654static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2655{
2656 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2657 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2658 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2659 fattr->nlink = 2;
2660}
2661
2662static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2663 struct qstr *name, struct nfs_fh *fhandle,
2664 struct nfs_fattr *fattr)
2665{
2666 struct nfs4_exception exception = { };
2667 struct rpc_clnt *client = *clnt;
2668 int err;
2669 do {
2670 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2671 switch (err) {
2672 case -NFS4ERR_BADNAME:
2673 err = -ENOENT;
2674 goto out;
2675 case -NFS4ERR_MOVED:
2676 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2677 goto out;
2678 case -NFS4ERR_WRONGSEC:
2679 err = -EPERM;
2680 if (client != *clnt)
2681 goto out;
2682
2683 client = nfs4_create_sec_client(client, dir, name);
2684 if (IS_ERR(client))
2685 return PTR_ERR(client);
2686
2687 exception.retry = 1;
2688 break;
2689 default:
2690 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2691 }
2692 } while (exception.retry);
2693
2694out:
2695 if (err == 0)
2696 *clnt = client;
2697 else if (client != *clnt)
2698 rpc_shutdown_client(client);
2699
2700 return err;
2701}
2702
2703static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2704 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2705{
2706 int status;
2707 struct rpc_clnt *client = NFS_CLIENT(dir);
2708
2709 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2710 if (client != NFS_CLIENT(dir)) {
2711 rpc_shutdown_client(client);
2712 nfs_fixup_secinfo_attributes(fattr);
2713 }
2714 return status;
2715}
2716
2717struct rpc_clnt *
2718nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2719 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2720{
2721 int status;
2722 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2723
2724 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2725 if (status < 0) {
2726 rpc_shutdown_client(client);
2727 return ERR_PTR(status);
2728 }
2729 return client;
2730}
2731
2732static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2733{
2734 struct nfs_server *server = NFS_SERVER(inode);
2735 struct nfs4_accessargs args = {
2736 .fh = NFS_FH(inode),
2737 .bitmask = server->cache_consistency_bitmask,
2738 };
2739 struct nfs4_accessres res = {
2740 .server = server,
2741 };
2742 struct rpc_message msg = {
2743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2744 .rpc_argp = &args,
2745 .rpc_resp = &res,
2746 .rpc_cred = entry->cred,
2747 };
2748 int mode = entry->mask;
2749 int status;
2750
2751 /*
2752 * Determine which access bits we want to ask for...
2753 */
2754 if (mode & MAY_READ)
2755 args.access |= NFS4_ACCESS_READ;
2756 if (S_ISDIR(inode->i_mode)) {
2757 if (mode & MAY_WRITE)
2758 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2759 if (mode & MAY_EXEC)
2760 args.access |= NFS4_ACCESS_LOOKUP;
2761 } else {
2762 if (mode & MAY_WRITE)
2763 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2764 if (mode & MAY_EXEC)
2765 args.access |= NFS4_ACCESS_EXECUTE;
2766 }
2767
2768 res.fattr = nfs_alloc_fattr();
2769 if (res.fattr == NULL)
2770 return -ENOMEM;
2771
2772 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2773 if (!status) {
2774 entry->mask = 0;
2775 if (res.access & NFS4_ACCESS_READ)
2776 entry->mask |= MAY_READ;
2777 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2778 entry->mask |= MAY_WRITE;
2779 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2780 entry->mask |= MAY_EXEC;
2781 nfs_refresh_inode(inode, res.fattr);
2782 }
2783 nfs_free_fattr(res.fattr);
2784 return status;
2785}
2786
2787static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2788{
2789 struct nfs4_exception exception = { };
2790 int err;
2791 do {
2792 err = nfs4_handle_exception(NFS_SERVER(inode),
2793 _nfs4_proc_access(inode, entry),
2794 &exception);
2795 } while (exception.retry);
2796 return err;
2797}
2798
2799/*
2800 * TODO: For the time being, we don't try to get any attributes
2801 * along with any of the zero-copy operations READ, READDIR,
2802 * READLINK, WRITE.
2803 *
2804 * In the case of the first three, we want to put the GETATTR
2805 * after the read-type operation -- this is because it is hard
2806 * to predict the length of a GETATTR response in v4, and thus
2807 * align the READ data correctly. This means that the GETATTR
2808 * may end up partially falling into the page cache, and we should
2809 * shift it into the 'tail' of the xdr_buf before processing.
2810 * To do this efficiently, we need to know the total length
2811 * of data received, which doesn't seem to be available outside
2812 * of the RPC layer.
2813 *
2814 * In the case of WRITE, we also want to put the GETATTR after
2815 * the operation -- in this case because we want to make sure
2816 * we get the post-operation mtime and size.
2817 *
2818 * Both of these changes to the XDR layer would in fact be quite
2819 * minor, but I decided to leave them for a subsequent patch.
2820 */
2821static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2822 unsigned int pgbase, unsigned int pglen)
2823{
2824 struct nfs4_readlink args = {
2825 .fh = NFS_FH(inode),
2826 .pgbase = pgbase,
2827 .pglen = pglen,
2828 .pages = &page,
2829 };
2830 struct nfs4_readlink_res res;
2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2833 .rpc_argp = &args,
2834 .rpc_resp = &res,
2835 };
2836
2837 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2838}
2839
2840static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2841 unsigned int pgbase, unsigned int pglen)
2842{
2843 struct nfs4_exception exception = { };
2844 int err;
2845 do {
2846 err = nfs4_handle_exception(NFS_SERVER(inode),
2847 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2848 &exception);
2849 } while (exception.retry);
2850 return err;
2851}
2852
2853/*
2854 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2855 */
2856static int
2857nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2858 int flags)
2859{
2860 struct nfs_open_context *ctx;
2861 struct nfs4_state *state;
2862 int status = 0;
2863
2864 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2865 if (IS_ERR(ctx))
2866 return PTR_ERR(ctx);
2867
2868 sattr->ia_mode &= ~current_umask();
2869 state = nfs4_do_open(dir, dentry, ctx->mode,
2870 flags, sattr, ctx->cred,
2871 &ctx->mdsthreshold);
2872 d_drop(dentry);
2873 if (IS_ERR(state)) {
2874 status = PTR_ERR(state);
2875 goto out;
2876 }
2877 d_add(dentry, igrab(state->inode));
2878 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2879 ctx->state = state;
2880out:
2881 put_nfs_open_context(ctx);
2882 return status;
2883}
2884
2885static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2886{
2887 struct nfs_server *server = NFS_SERVER(dir);
2888 struct nfs_removeargs args = {
2889 .fh = NFS_FH(dir),
2890 .name = *name,
2891 };
2892 struct nfs_removeres res = {
2893 .server = server,
2894 };
2895 struct rpc_message msg = {
2896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2897 .rpc_argp = &args,
2898 .rpc_resp = &res,
2899 };
2900 int status;
2901
2902 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2903 if (status == 0)
2904 update_changeattr(dir, &res.cinfo);
2905 return status;
2906}
2907
2908static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2909{
2910 struct nfs4_exception exception = { };
2911 int err;
2912 do {
2913 err = nfs4_handle_exception(NFS_SERVER(dir),
2914 _nfs4_proc_remove(dir, name),
2915 &exception);
2916 } while (exception.retry);
2917 return err;
2918}
2919
2920static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2921{
2922 struct nfs_server *server = NFS_SERVER(dir);
2923 struct nfs_removeargs *args = msg->rpc_argp;
2924 struct nfs_removeres *res = msg->rpc_resp;
2925
2926 res->server = server;
2927 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2928 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2929}
2930
2931static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2932{
2933 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2934 &data->args.seq_args,
2935 &data->res.seq_res,
2936 task))
2937 return;
2938 rpc_call_start(task);
2939}
2940
2941static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2942{
2943 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2944
2945 if (!nfs4_sequence_done(task, &res->seq_res))
2946 return 0;
2947 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2948 return 0;
2949 update_changeattr(dir, &res->cinfo);
2950 return 1;
2951}
2952
2953static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2954{
2955 struct nfs_server *server = NFS_SERVER(dir);
2956 struct nfs_renameargs *arg = msg->rpc_argp;
2957 struct nfs_renameres *res = msg->rpc_resp;
2958
2959 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2960 res->server = server;
2961 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2962}
2963
2964static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2965{
2966 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2967 &data->args.seq_args,
2968 &data->res.seq_res,
2969 task))
2970 return;
2971 rpc_call_start(task);
2972}
2973
2974static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2975 struct inode *new_dir)
2976{
2977 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2978
2979 if (!nfs4_sequence_done(task, &res->seq_res))
2980 return 0;
2981 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2982 return 0;
2983
2984 update_changeattr(old_dir, &res->old_cinfo);
2985 update_changeattr(new_dir, &res->new_cinfo);
2986 return 1;
2987}
2988
2989static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2990 struct inode *new_dir, struct qstr *new_name)
2991{
2992 struct nfs_server *server = NFS_SERVER(old_dir);
2993 struct nfs_renameargs arg = {
2994 .old_dir = NFS_FH(old_dir),
2995 .new_dir = NFS_FH(new_dir),
2996 .old_name = old_name,
2997 .new_name = new_name,
2998 };
2999 struct nfs_renameres res = {
3000 .server = server,
3001 };
3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3004 .rpc_argp = &arg,
3005 .rpc_resp = &res,
3006 };
3007 int status = -ENOMEM;
3008
3009 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3010 if (!status) {
3011 update_changeattr(old_dir, &res.old_cinfo);
3012 update_changeattr(new_dir, &res.new_cinfo);
3013 }
3014 return status;
3015}
3016
3017static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3018 struct inode *new_dir, struct qstr *new_name)
3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022 do {
3023 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3024 _nfs4_proc_rename(old_dir, old_name,
3025 new_dir, new_name),
3026 &exception);
3027 } while (exception.retry);
3028 return err;
3029}
3030
3031static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3032{
3033 struct nfs_server *server = NFS_SERVER(inode);
3034 struct nfs4_link_arg arg = {
3035 .fh = NFS_FH(inode),
3036 .dir_fh = NFS_FH(dir),
3037 .name = name,
3038 .bitmask = server->attr_bitmask,
3039 };
3040 struct nfs4_link_res res = {
3041 .server = server,
3042 };
3043 struct rpc_message msg = {
3044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3045 .rpc_argp = &arg,
3046 .rpc_resp = &res,
3047 };
3048 int status = -ENOMEM;
3049
3050 res.fattr = nfs_alloc_fattr();
3051 if (res.fattr == NULL)
3052 goto out;
3053
3054 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3055 if (!status) {
3056 update_changeattr(dir, &res.cinfo);
3057 nfs_post_op_update_inode(inode, res.fattr);
3058 }
3059out:
3060 nfs_free_fattr(res.fattr);
3061 return status;
3062}
3063
3064static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3065{
3066 struct nfs4_exception exception = { };
3067 int err;
3068 do {
3069 err = nfs4_handle_exception(NFS_SERVER(inode),
3070 _nfs4_proc_link(inode, dir, name),
3071 &exception);
3072 } while (exception.retry);
3073 return err;
3074}
3075
3076struct nfs4_createdata {
3077 struct rpc_message msg;
3078 struct nfs4_create_arg arg;
3079 struct nfs4_create_res res;
3080 struct nfs_fh fh;
3081 struct nfs_fattr fattr;
3082};
3083
3084static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3085 struct qstr *name, struct iattr *sattr, u32 ftype)
3086{
3087 struct nfs4_createdata *data;
3088
3089 data = kzalloc(sizeof(*data), GFP_KERNEL);
3090 if (data != NULL) {
3091 struct nfs_server *server = NFS_SERVER(dir);
3092
3093 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3094 data->msg.rpc_argp = &data->arg;
3095 data->msg.rpc_resp = &data->res;
3096 data->arg.dir_fh = NFS_FH(dir);
3097 data->arg.server = server;
3098 data->arg.name = name;
3099 data->arg.attrs = sattr;
3100 data->arg.ftype = ftype;
3101 data->arg.bitmask = server->attr_bitmask;
3102 data->res.server = server;
3103 data->res.fh = &data->fh;
3104 data->res.fattr = &data->fattr;
3105 nfs_fattr_init(data->res.fattr);
3106 }
3107 return data;
3108}
3109
3110static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3111{
3112 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3113 &data->arg.seq_args, &data->res.seq_res, 1);
3114 if (status == 0) {
3115 update_changeattr(dir, &data->res.dir_cinfo);
3116 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3117 }
3118 return status;
3119}
3120
3121static void nfs4_free_createdata(struct nfs4_createdata *data)
3122{
3123 kfree(data);
3124}
3125
3126static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3127 struct page *page, unsigned int len, struct iattr *sattr)
3128{
3129 struct nfs4_createdata *data;
3130 int status = -ENAMETOOLONG;
3131
3132 if (len > NFS4_MAXPATHLEN)
3133 goto out;
3134
3135 status = -ENOMEM;
3136 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3137 if (data == NULL)
3138 goto out;
3139
3140 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3141 data->arg.u.symlink.pages = &page;
3142 data->arg.u.symlink.len = len;
3143
3144 status = nfs4_do_create(dir, dentry, data);
3145
3146 nfs4_free_createdata(data);
3147out:
3148 return status;
3149}
3150
3151static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3152 struct page *page, unsigned int len, struct iattr *sattr)
3153{
3154 struct nfs4_exception exception = { };
3155 int err;
3156 do {
3157 err = nfs4_handle_exception(NFS_SERVER(dir),
3158 _nfs4_proc_symlink(dir, dentry, page,
3159 len, sattr),
3160 &exception);
3161 } while (exception.retry);
3162 return err;
3163}
3164
3165static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3166 struct iattr *sattr)
3167{
3168 struct nfs4_createdata *data;
3169 int status = -ENOMEM;
3170
3171 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3172 if (data == NULL)
3173 goto out;
3174
3175 status = nfs4_do_create(dir, dentry, data);
3176
3177 nfs4_free_createdata(data);
3178out:
3179 return status;
3180}
3181
3182static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3183 struct iattr *sattr)
3184{
3185 struct nfs4_exception exception = { };
3186 int err;
3187
3188 sattr->ia_mode &= ~current_umask();
3189 do {
3190 err = nfs4_handle_exception(NFS_SERVER(dir),
3191 _nfs4_proc_mkdir(dir, dentry, sattr),
3192 &exception);
3193 } while (exception.retry);
3194 return err;
3195}
3196
3197static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3198 u64 cookie, struct page **pages, unsigned int count, int plus)
3199{
3200 struct inode *dir = dentry->d_inode;
3201 struct nfs4_readdir_arg args = {
3202 .fh = NFS_FH(dir),
3203 .pages = pages,
3204 .pgbase = 0,
3205 .count = count,
3206 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3207 .plus = plus,
3208 };
3209 struct nfs4_readdir_res res;
3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3212 .rpc_argp = &args,
3213 .rpc_resp = &res,
3214 .rpc_cred = cred,
3215 };
3216 int status;
3217
3218 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3219 dentry->d_parent->d_name.name,
3220 dentry->d_name.name,
3221 (unsigned long long)cookie);
3222 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3223 res.pgbase = args.pgbase;
3224 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3225 if (status >= 0) {
3226 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3227 status += args.pgbase;
3228 }
3229
3230 nfs_invalidate_atime(dir);
3231
3232 dprintk("%s: returns %d\n", __func__, status);
3233 return status;
3234}
3235
3236static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3237 u64 cookie, struct page **pages, unsigned int count, int plus)
3238{
3239 struct nfs4_exception exception = { };
3240 int err;
3241 do {
3242 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3243 _nfs4_proc_readdir(dentry, cred, cookie,
3244 pages, count, plus),
3245 &exception);
3246 } while (exception.retry);
3247 return err;
3248}
3249
3250static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3251 struct iattr *sattr, dev_t rdev)
3252{
3253 struct nfs4_createdata *data;
3254 int mode = sattr->ia_mode;
3255 int status = -ENOMEM;
3256
3257 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3258 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3259
3260 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3261 if (data == NULL)
3262 goto out;
3263
3264 if (S_ISFIFO(mode))
3265 data->arg.ftype = NF4FIFO;
3266 else if (S_ISBLK(mode)) {
3267 data->arg.ftype = NF4BLK;
3268 data->arg.u.device.specdata1 = MAJOR(rdev);
3269 data->arg.u.device.specdata2 = MINOR(rdev);
3270 }
3271 else if (S_ISCHR(mode)) {
3272 data->arg.ftype = NF4CHR;
3273 data->arg.u.device.specdata1 = MAJOR(rdev);
3274 data->arg.u.device.specdata2 = MINOR(rdev);
3275 }
3276
3277 status = nfs4_do_create(dir, dentry, data);
3278
3279 nfs4_free_createdata(data);
3280out:
3281 return status;
3282}
3283
3284static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3285 struct iattr *sattr, dev_t rdev)
3286{
3287 struct nfs4_exception exception = { };
3288 int err;
3289
3290 sattr->ia_mode &= ~current_umask();
3291 do {
3292 err = nfs4_handle_exception(NFS_SERVER(dir),
3293 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3294 &exception);
3295 } while (exception.retry);
3296 return err;
3297}
3298
3299static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3300 struct nfs_fsstat *fsstat)
3301{
3302 struct nfs4_statfs_arg args = {
3303 .fh = fhandle,
3304 .bitmask = server->attr_bitmask,
3305 };
3306 struct nfs4_statfs_res res = {
3307 .fsstat = fsstat,
3308 };
3309 struct rpc_message msg = {
3310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3311 .rpc_argp = &args,
3312 .rpc_resp = &res,
3313 };
3314
3315 nfs_fattr_init(fsstat->fattr);
3316 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3317}
3318
3319static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3320{
3321 struct nfs4_exception exception = { };
3322 int err;
3323 do {
3324 err = nfs4_handle_exception(server,
3325 _nfs4_proc_statfs(server, fhandle, fsstat),
3326 &exception);
3327 } while (exception.retry);
3328 return err;
3329}
3330
3331static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3332 struct nfs_fsinfo *fsinfo)
3333{
3334 struct nfs4_fsinfo_arg args = {
3335 .fh = fhandle,
3336 .bitmask = server->attr_bitmask,
3337 };
3338 struct nfs4_fsinfo_res res = {
3339 .fsinfo = fsinfo,
3340 };
3341 struct rpc_message msg = {
3342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3343 .rpc_argp = &args,
3344 .rpc_resp = &res,
3345 };
3346
3347 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3348}
3349
3350static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3351{
3352 struct nfs4_exception exception = { };
3353 int err;
3354
3355 do {
3356 err = nfs4_handle_exception(server,
3357 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3358 &exception);
3359 } while (exception.retry);
3360 return err;
3361}
3362
3363static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3364{
3365 int error;
3366
3367 nfs_fattr_init(fsinfo->fattr);
3368 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3369 if (error == 0)
3370 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3371
3372 return error;
3373}
3374
3375static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3376 struct nfs_pathconf *pathconf)
3377{
3378 struct nfs4_pathconf_arg args = {
3379 .fh = fhandle,
3380 .bitmask = server->attr_bitmask,
3381 };
3382 struct nfs4_pathconf_res res = {
3383 .pathconf = pathconf,
3384 };
3385 struct rpc_message msg = {
3386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3387 .rpc_argp = &args,
3388 .rpc_resp = &res,
3389 };
3390
3391 /* None of the pathconf attributes are mandatory to implement */
3392 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3393 memset(pathconf, 0, sizeof(*pathconf));
3394 return 0;
3395 }
3396
3397 nfs_fattr_init(pathconf->fattr);
3398 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3399}
3400
3401static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3402 struct nfs_pathconf *pathconf)
3403{
3404 struct nfs4_exception exception = { };
3405 int err;
3406
3407 do {
3408 err = nfs4_handle_exception(server,
3409 _nfs4_proc_pathconf(server, fhandle, pathconf),
3410 &exception);
3411 } while (exception.retry);
3412 return err;
3413}
3414
3415void __nfs4_read_done_cb(struct nfs_read_data *data)
3416{
3417 nfs_invalidate_atime(data->header->inode);
3418}
3419
3420static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3421{
3422 struct nfs_server *server = NFS_SERVER(data->header->inode);
3423
3424 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3425 rpc_restart_call_prepare(task);
3426 return -EAGAIN;
3427 }
3428
3429 __nfs4_read_done_cb(data);
3430 if (task->tk_status > 0)
3431 renew_lease(server, data->timestamp);
3432 return 0;
3433}
3434
3435static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3436{
3437
3438 dprintk("--> %s\n", __func__);
3439
3440 if (!nfs4_sequence_done(task, &data->res.seq_res))
3441 return -EAGAIN;
3442
3443 return data->read_done_cb ? data->read_done_cb(task, data) :
3444 nfs4_read_done_cb(task, data);
3445}
3446
3447static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3448{
3449 data->timestamp = jiffies;
3450 data->read_done_cb = nfs4_read_done_cb;
3451 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3452 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3453}
3454
3455static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3456{
3457 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3458 &data->args.seq_args,
3459 &data->res.seq_res,
3460 task))
3461 return;
3462 rpc_call_start(task);
3463}
3464
3465static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3466{
3467 struct inode *inode = data->header->inode;
3468
3469 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3470 rpc_restart_call_prepare(task);
3471 return -EAGAIN;
3472 }
3473 if (task->tk_status >= 0) {
3474 renew_lease(NFS_SERVER(inode), data->timestamp);
3475 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3476 }
3477 return 0;
3478}
3479
3480static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3481{
3482 if (!nfs4_sequence_done(task, &data->res.seq_res))
3483 return -EAGAIN;
3484 return data->write_done_cb ? data->write_done_cb(task, data) :
3485 nfs4_write_done_cb(task, data);
3486}
3487
3488static
3489bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3490{
3491 const struct nfs_pgio_header *hdr = data->header;
3492
3493 /* Don't request attributes for pNFS or O_DIRECT writes */
3494 if (data->ds_clp != NULL || hdr->dreq != NULL)
3495 return false;
3496 /* Otherwise, request attributes if and only if we don't hold
3497 * a delegation
3498 */
3499 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3500}
3501
3502static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3503{
3504 struct nfs_server *server = NFS_SERVER(data->header->inode);
3505
3506 if (!nfs4_write_need_cache_consistency_data(data)) {
3507 data->args.bitmask = NULL;
3508 data->res.fattr = NULL;
3509 } else
3510 data->args.bitmask = server->cache_consistency_bitmask;
3511
3512 if (!data->write_done_cb)
3513 data->write_done_cb = nfs4_write_done_cb;
3514 data->res.server = server;
3515 data->timestamp = jiffies;
3516
3517 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3518 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3519}
3520
3521static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3522{
3523 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3524 &data->args.seq_args,
3525 &data->res.seq_res,
3526 task))
3527 return;
3528 rpc_call_start(task);
3529}
3530
3531static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3532{
3533 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3534 &data->args.seq_args,
3535 &data->res.seq_res,
3536 task))
3537 return;
3538 rpc_call_start(task);
3539}
3540
3541static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3542{
3543 struct inode *inode = data->inode;
3544
3545 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3546 rpc_restart_call_prepare(task);
3547 return -EAGAIN;
3548 }
3549 return 0;
3550}
3551
3552static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3553{
3554 if (!nfs4_sequence_done(task, &data->res.seq_res))
3555 return -EAGAIN;
3556 return data->commit_done_cb(task, data);
3557}
3558
3559static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3560{
3561 struct nfs_server *server = NFS_SERVER(data->inode);
3562
3563 if (data->commit_done_cb == NULL)
3564 data->commit_done_cb = nfs4_commit_done_cb;
3565 data->res.server = server;
3566 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3567 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3568}
3569
3570struct nfs4_renewdata {
3571 struct nfs_client *client;
3572 unsigned long timestamp;
3573};
3574
3575/*
3576 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3577 * standalone procedure for queueing an asynchronous RENEW.
3578 */
3579static void nfs4_renew_release(void *calldata)
3580{
3581 struct nfs4_renewdata *data = calldata;
3582 struct nfs_client *clp = data->client;
3583
3584 if (atomic_read(&clp->cl_count) > 1)
3585 nfs4_schedule_state_renewal(clp);
3586 nfs_put_client(clp);
3587 kfree(data);
3588}
3589
3590static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3591{
3592 struct nfs4_renewdata *data = calldata;
3593 struct nfs_client *clp = data->client;
3594 unsigned long timestamp = data->timestamp;
3595
3596 if (task->tk_status < 0) {
3597 /* Unless we're shutting down, schedule state recovery! */
3598 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3599 return;
3600 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3601 nfs4_schedule_lease_recovery(clp);
3602 return;
3603 }
3604 nfs4_schedule_path_down_recovery(clp);
3605 }
3606 do_renew_lease(clp, timestamp);
3607}
3608
3609static const struct rpc_call_ops nfs4_renew_ops = {
3610 .rpc_call_done = nfs4_renew_done,
3611 .rpc_release = nfs4_renew_release,
3612};
3613
3614static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3615{
3616 struct rpc_message msg = {
3617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3618 .rpc_argp = clp,
3619 .rpc_cred = cred,
3620 };
3621 struct nfs4_renewdata *data;
3622
3623 if (renew_flags == 0)
3624 return 0;
3625 if (!atomic_inc_not_zero(&clp->cl_count))
3626 return -EIO;
3627 data = kmalloc(sizeof(*data), GFP_NOFS);
3628 if (data == NULL)
3629 return -ENOMEM;
3630 data->client = clp;
3631 data->timestamp = jiffies;
3632 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3633 &nfs4_renew_ops, data);
3634}
3635
3636static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3637{
3638 struct rpc_message msg = {
3639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3640 .rpc_argp = clp,
3641 .rpc_cred = cred,
3642 };
3643 unsigned long now = jiffies;
3644 int status;
3645
3646 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3647 if (status < 0)
3648 return status;
3649 do_renew_lease(clp, now);
3650 return 0;
3651}
3652
3653static inline int nfs4_server_supports_acls(struct nfs_server *server)
3654{
3655 return (server->caps & NFS_CAP_ACLS)
3656 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3657 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3658}
3659
3660/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3661 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3662 * the stack.
3663 */
3664#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3665
3666static int buf_to_pages_noslab(const void *buf, size_t buflen,
3667 struct page **pages, unsigned int *pgbase)
3668{
3669 struct page *newpage, **spages;
3670 int rc = 0;
3671 size_t len;
3672 spages = pages;
3673
3674 do {
3675 len = min_t(size_t, PAGE_SIZE, buflen);
3676 newpage = alloc_page(GFP_KERNEL);
3677
3678 if (newpage == NULL)
3679 goto unwind;
3680 memcpy(page_address(newpage), buf, len);
3681 buf += len;
3682 buflen -= len;
3683 *pages++ = newpage;
3684 rc++;
3685 } while (buflen != 0);
3686
3687 return rc;
3688
3689unwind:
3690 for(; rc > 0; rc--)
3691 __free_page(spages[rc-1]);
3692 return -ENOMEM;
3693}
3694
3695struct nfs4_cached_acl {
3696 int cached;
3697 size_t len;
3698 char data[0];
3699};
3700
3701static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3702{
3703 struct nfs_inode *nfsi = NFS_I(inode);
3704
3705 spin_lock(&inode->i_lock);
3706 kfree(nfsi->nfs4_acl);
3707 nfsi->nfs4_acl = acl;
3708 spin_unlock(&inode->i_lock);
3709}
3710
3711static void nfs4_zap_acl_attr(struct inode *inode)
3712{
3713 nfs4_set_cached_acl(inode, NULL);
3714}
3715
3716static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3717{
3718 struct nfs_inode *nfsi = NFS_I(inode);
3719 struct nfs4_cached_acl *acl;
3720 int ret = -ENOENT;
3721
3722 spin_lock(&inode->i_lock);
3723 acl = nfsi->nfs4_acl;
3724 if (acl == NULL)
3725 goto out;
3726 if (buf == NULL) /* user is just asking for length */
3727 goto out_len;
3728 if (acl->cached == 0)
3729 goto out;
3730 ret = -ERANGE; /* see getxattr(2) man page */
3731 if (acl->len > buflen)
3732 goto out;
3733 memcpy(buf, acl->data, acl->len);
3734out_len:
3735 ret = acl->len;
3736out:
3737 spin_unlock(&inode->i_lock);
3738 return ret;
3739}
3740
3741static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3742{
3743 struct nfs4_cached_acl *acl;
3744 size_t buflen = sizeof(*acl) + acl_len;
3745
3746 if (buflen <= PAGE_SIZE) {
3747 acl = kmalloc(buflen, GFP_KERNEL);
3748 if (acl == NULL)
3749 goto out;
3750 acl->cached = 1;
3751 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3752 } else {
3753 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3754 if (acl == NULL)
3755 goto out;
3756 acl->cached = 0;
3757 }
3758 acl->len = acl_len;
3759out:
3760 nfs4_set_cached_acl(inode, acl);
3761}
3762
3763/*
3764 * The getxattr API returns the required buffer length when called with a
3765 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3766 * the required buf. On a NULL buf, we send a page of data to the server
3767 * guessing that the ACL request can be serviced by a page. If so, we cache
3768 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3769 * the cache. If not so, we throw away the page, and cache the required
3770 * length. The next getxattr call will then produce another round trip to
3771 * the server, this time with the input buf of the required size.
3772 */
3773static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3774{
3775 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3776 struct nfs_getaclargs args = {
3777 .fh = NFS_FH(inode),
3778 .acl_pages = pages,
3779 .acl_len = buflen,
3780 };
3781 struct nfs_getaclres res = {
3782 .acl_len = buflen,
3783 };
3784 struct rpc_message msg = {
3785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3786 .rpc_argp = &args,
3787 .rpc_resp = &res,
3788 };
3789 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3790 int ret = -ENOMEM, i;
3791
3792 /* As long as we're doing a round trip to the server anyway,
3793 * let's be prepared for a page of acl data. */
3794 if (npages == 0)
3795 npages = 1;
3796 if (npages > ARRAY_SIZE(pages))
3797 return -ERANGE;
3798
3799 for (i = 0; i < npages; i++) {
3800 pages[i] = alloc_page(GFP_KERNEL);
3801 if (!pages[i])
3802 goto out_free;
3803 }
3804
3805 /* for decoding across pages */
3806 res.acl_scratch = alloc_page(GFP_KERNEL);
3807 if (!res.acl_scratch)
3808 goto out_free;
3809
3810 args.acl_len = npages * PAGE_SIZE;
3811 args.acl_pgbase = 0;
3812
3813 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3814 __func__, buf, buflen, npages, args.acl_len);
3815 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3816 &msg, &args.seq_args, &res.seq_res, 0);
3817 if (ret)
3818 goto out_free;
3819
3820 /* Handle the case where the passed-in buffer is too short */
3821 if (res.acl_flags & NFS4_ACL_TRUNC) {
3822 /* Did the user only issue a request for the acl length? */
3823 if (buf == NULL)
3824 goto out_ok;
3825 ret = -ERANGE;
3826 goto out_free;
3827 }
3828 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3829 if (buf)
3830 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3831out_ok:
3832 ret = res.acl_len;
3833out_free:
3834 for (i = 0; i < npages; i++)
3835 if (pages[i])
3836 __free_page(pages[i]);
3837 if (res.acl_scratch)
3838 __free_page(res.acl_scratch);
3839 return ret;
3840}
3841
3842static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3843{
3844 struct nfs4_exception exception = { };
3845 ssize_t ret;
3846 do {
3847 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3848 if (ret >= 0)
3849 break;
3850 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3851 } while (exception.retry);
3852 return ret;
3853}
3854
3855static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3856{
3857 struct nfs_server *server = NFS_SERVER(inode);
3858 int ret;
3859
3860 if (!nfs4_server_supports_acls(server))
3861 return -EOPNOTSUPP;
3862 ret = nfs_revalidate_inode(server, inode);
3863 if (ret < 0)
3864 return ret;
3865 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3866 nfs_zap_acl_cache(inode);
3867 ret = nfs4_read_cached_acl(inode, buf, buflen);
3868 if (ret != -ENOENT)
3869 /* -ENOENT is returned if there is no ACL or if there is an ACL
3870 * but no cached acl data, just the acl length */
3871 return ret;
3872 return nfs4_get_acl_uncached(inode, buf, buflen);
3873}
3874
3875static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3876{
3877 struct nfs_server *server = NFS_SERVER(inode);
3878 struct page *pages[NFS4ACL_MAXPAGES];
3879 struct nfs_setaclargs arg = {
3880 .fh = NFS_FH(inode),
3881 .acl_pages = pages,
3882 .acl_len = buflen,
3883 };
3884 struct nfs_setaclres res;
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3887 .rpc_argp = &arg,
3888 .rpc_resp = &res,
3889 };
3890 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3891 int ret, i;
3892
3893 if (!nfs4_server_supports_acls(server))
3894 return -EOPNOTSUPP;
3895 if (npages > ARRAY_SIZE(pages))
3896 return -ERANGE;
3897 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3898 if (i < 0)
3899 return i;
3900 nfs4_inode_return_delegation(inode);
3901 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3902
3903 /*
3904 * Free each page after tx, so the only ref left is
3905 * held by the network stack
3906 */
3907 for (; i > 0; i--)
3908 put_page(pages[i-1]);
3909
3910 /*
3911 * Acl update can result in inode attribute update.
3912 * so mark the attribute cache invalid.
3913 */
3914 spin_lock(&inode->i_lock);
3915 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3916 spin_unlock(&inode->i_lock);
3917 nfs_access_zap_cache(inode);
3918 nfs_zap_acl_cache(inode);
3919 return ret;
3920}
3921
3922static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3923{
3924 struct nfs4_exception exception = { };
3925 int err;
3926 do {
3927 err = nfs4_handle_exception(NFS_SERVER(inode),
3928 __nfs4_proc_set_acl(inode, buf, buflen),
3929 &exception);
3930 } while (exception.retry);
3931 return err;
3932}
3933
3934static int
3935nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3936{
3937 struct nfs_client *clp = server->nfs_client;
3938
3939 if (task->tk_status >= 0)
3940 return 0;
3941 switch(task->tk_status) {
3942 case -NFS4ERR_DELEG_REVOKED:
3943 case -NFS4ERR_ADMIN_REVOKED:
3944 case -NFS4ERR_BAD_STATEID:
3945 if (state == NULL)
3946 break;
3947 nfs_remove_bad_delegation(state->inode);
3948 case -NFS4ERR_OPENMODE:
3949 if (state == NULL)
3950 break;
3951 nfs4_schedule_stateid_recovery(server, state);
3952 goto wait_on_recovery;
3953 case -NFS4ERR_EXPIRED:
3954 if (state != NULL)
3955 nfs4_schedule_stateid_recovery(server, state);
3956 case -NFS4ERR_STALE_STATEID:
3957 case -NFS4ERR_STALE_CLIENTID:
3958 nfs4_schedule_lease_recovery(clp);
3959 goto wait_on_recovery;
3960#if defined(CONFIG_NFS_V4_1)
3961 case -NFS4ERR_BADSESSION:
3962 case -NFS4ERR_BADSLOT:
3963 case -NFS4ERR_BAD_HIGH_SLOT:
3964 case -NFS4ERR_DEADSESSION:
3965 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3966 case -NFS4ERR_SEQ_FALSE_RETRY:
3967 case -NFS4ERR_SEQ_MISORDERED:
3968 dprintk("%s ERROR %d, Reset session\n", __func__,
3969 task->tk_status);
3970 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3971 task->tk_status = 0;
3972 return -EAGAIN;
3973#endif /* CONFIG_NFS_V4_1 */
3974 case -NFS4ERR_DELAY:
3975 nfs_inc_server_stats(server, NFSIOS_DELAY);
3976 case -NFS4ERR_GRACE:
3977 case -EKEYEXPIRED:
3978 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3979 task->tk_status = 0;
3980 return -EAGAIN;
3981 case -NFS4ERR_RETRY_UNCACHED_REP:
3982 case -NFS4ERR_OLD_STATEID:
3983 task->tk_status = 0;
3984 return -EAGAIN;
3985 }
3986 task->tk_status = nfs4_map_errors(task->tk_status);
3987 return 0;
3988wait_on_recovery:
3989 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3990 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3991 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3992 task->tk_status = 0;
3993 return -EAGAIN;
3994}
3995
3996static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3997 nfs4_verifier *bootverf)
3998{
3999 __be32 verf[2];
4000
4001 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4002 /* An impossible timestamp guarantees this value
4003 * will never match a generated boot time. */
4004 verf[0] = 0;
4005 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4006 } else {
4007 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4008 verf[0] = (__be32)nn->boot_time.tv_sec;
4009 verf[1] = (__be32)nn->boot_time.tv_nsec;
4010 }
4011 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4012}
4013
4014/**
4015 * nfs4_proc_setclientid - Negotiate client ID
4016 * @clp: state data structure
4017 * @program: RPC program for NFSv4 callback service
4018 * @port: IP port number for NFS4 callback service
4019 * @cred: RPC credential to use for this call
4020 * @res: where to place the result
4021 *
4022 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4023 */
4024int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4025 unsigned short port, struct rpc_cred *cred,
4026 struct nfs4_setclientid_res *res)
4027{
4028 nfs4_verifier sc_verifier;
4029 struct nfs4_setclientid setclientid = {
4030 .sc_verifier = &sc_verifier,
4031 .sc_prog = program,
4032 .sc_cb_ident = clp->cl_cb_ident,
4033 };
4034 struct rpc_message msg = {
4035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4036 .rpc_argp = &setclientid,
4037 .rpc_resp = res,
4038 .rpc_cred = cred,
4039 };
4040 int status;
4041
4042 /* nfs_client_id4 */
4043 nfs4_init_boot_verifier(clp, &sc_verifier);
4044 rcu_read_lock();
4045 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4046 sizeof(setclientid.sc_name), "%s/%s %s",
4047 clp->cl_ipaddr,
4048 rpc_peeraddr2str(clp->cl_rpcclient,
4049 RPC_DISPLAY_ADDR),
4050 rpc_peeraddr2str(clp->cl_rpcclient,
4051 RPC_DISPLAY_PROTO));
4052 /* cb_client4 */
4053 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4054 sizeof(setclientid.sc_netid),
4055 rpc_peeraddr2str(clp->cl_rpcclient,
4056 RPC_DISPLAY_NETID));
4057 rcu_read_unlock();
4058 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4059 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4060 clp->cl_ipaddr, port >> 8, port & 255);
4061
4062 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4063 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4064 setclientid.sc_name_len, setclientid.sc_name);
4065 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4066 dprintk("NFS reply setclientid: %d\n", status);
4067 return status;
4068}
4069
4070/**
4071 * nfs4_proc_setclientid_confirm - Confirm client ID
4072 * @clp: state data structure
4073 * @res: result of a previous SETCLIENTID
4074 * @cred: RPC credential to use for this call
4075 *
4076 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4077 */
4078int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4079 struct nfs4_setclientid_res *arg,
4080 struct rpc_cred *cred)
4081{
4082 struct nfs_fsinfo fsinfo;
4083 struct rpc_message msg = {
4084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4085 .rpc_argp = arg,
4086 .rpc_resp = &fsinfo,
4087 .rpc_cred = cred,
4088 };
4089 unsigned long now;
4090 int status;
4091
4092 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4093 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4094 clp->cl_clientid);
4095 now = jiffies;
4096 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4097 if (status == 0) {
4098 spin_lock(&clp->cl_lock);
4099 clp->cl_lease_time = fsinfo.lease_time * HZ;
4100 clp->cl_last_renewal = now;
4101 spin_unlock(&clp->cl_lock);
4102 }
4103 dprintk("NFS reply setclientid_confirm: %d\n", status);
4104 return status;
4105}
4106
4107struct nfs4_delegreturndata {
4108 struct nfs4_delegreturnargs args;
4109 struct nfs4_delegreturnres res;
4110 struct nfs_fh fh;
4111 nfs4_stateid stateid;
4112 unsigned long timestamp;
4113 struct nfs_fattr fattr;
4114 int rpc_status;
4115};
4116
4117static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4118{
4119 struct nfs4_delegreturndata *data = calldata;
4120
4121 if (!nfs4_sequence_done(task, &data->res.seq_res))
4122 return;
4123
4124 switch (task->tk_status) {
4125 case -NFS4ERR_STALE_STATEID:
4126 case -NFS4ERR_EXPIRED:
4127 case 0:
4128 renew_lease(data->res.server, data->timestamp);
4129 break;
4130 default:
4131 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4132 -EAGAIN) {
4133 rpc_restart_call_prepare(task);
4134 return;
4135 }
4136 }
4137 data->rpc_status = task->tk_status;
4138}
4139
4140static void nfs4_delegreturn_release(void *calldata)
4141{
4142 kfree(calldata);
4143}
4144
4145#if defined(CONFIG_NFS_V4_1)
4146static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4147{
4148 struct nfs4_delegreturndata *d_data;
4149
4150 d_data = (struct nfs4_delegreturndata *)data;
4151
4152 if (nfs4_setup_sequence(d_data->res.server,
4153 &d_data->args.seq_args,
4154 &d_data->res.seq_res, task))
4155 return;
4156 rpc_call_start(task);
4157}
4158#endif /* CONFIG_NFS_V4_1 */
4159
4160static const struct rpc_call_ops nfs4_delegreturn_ops = {
4161#if defined(CONFIG_NFS_V4_1)
4162 .rpc_call_prepare = nfs4_delegreturn_prepare,
4163#endif /* CONFIG_NFS_V4_1 */
4164 .rpc_call_done = nfs4_delegreturn_done,
4165 .rpc_release = nfs4_delegreturn_release,
4166};
4167
4168static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4169{
4170 struct nfs4_delegreturndata *data;
4171 struct nfs_server *server = NFS_SERVER(inode);
4172 struct rpc_task *task;
4173 struct rpc_message msg = {
4174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4175 .rpc_cred = cred,
4176 };
4177 struct rpc_task_setup task_setup_data = {
4178 .rpc_client = server->client,
4179 .rpc_message = &msg,
4180 .callback_ops = &nfs4_delegreturn_ops,
4181 .flags = RPC_TASK_ASYNC,
4182 };
4183 int status = 0;
4184
4185 data = kzalloc(sizeof(*data), GFP_NOFS);
4186 if (data == NULL)
4187 return -ENOMEM;
4188 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4189 data->args.fhandle = &data->fh;
4190 data->args.stateid = &data->stateid;
4191 data->args.bitmask = server->cache_consistency_bitmask;
4192 nfs_copy_fh(&data->fh, NFS_FH(inode));
4193 nfs4_stateid_copy(&data->stateid, stateid);
4194 data->res.fattr = &data->fattr;
4195 data->res.server = server;
4196 nfs_fattr_init(data->res.fattr);
4197 data->timestamp = jiffies;
4198 data->rpc_status = 0;
4199
4200 task_setup_data.callback_data = data;
4201 msg.rpc_argp = &data->args;
4202 msg.rpc_resp = &data->res;
4203 task = rpc_run_task(&task_setup_data);
4204 if (IS_ERR(task))
4205 return PTR_ERR(task);
4206 if (!issync)
4207 goto out;
4208 status = nfs4_wait_for_completion_rpc_task(task);
4209 if (status != 0)
4210 goto out;
4211 status = data->rpc_status;
4212 if (status == 0)
4213 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4214 else
4215 nfs_refresh_inode(inode, &data->fattr);
4216out:
4217 rpc_put_task(task);
4218 return status;
4219}
4220
4221int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4222{
4223 struct nfs_server *server = NFS_SERVER(inode);
4224 struct nfs4_exception exception = { };
4225 int err;
4226 do {
4227 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4228 switch (err) {
4229 case -NFS4ERR_STALE_STATEID:
4230 case -NFS4ERR_EXPIRED:
4231 case 0:
4232 return 0;
4233 }
4234 err = nfs4_handle_exception(server, err, &exception);
4235 } while (exception.retry);
4236 return err;
4237}
4238
4239#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4240#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4241
4242/*
4243 * sleep, with exponential backoff, and retry the LOCK operation.
4244 */
4245static unsigned long
4246nfs4_set_lock_task_retry(unsigned long timeout)
4247{
4248 freezable_schedule_timeout_killable(timeout);
4249 timeout <<= 1;
4250 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4251 return NFS4_LOCK_MAXTIMEOUT;
4252 return timeout;
4253}
4254
4255static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4256{
4257 struct inode *inode = state->inode;
4258 struct nfs_server *server = NFS_SERVER(inode);
4259 struct nfs_client *clp = server->nfs_client;
4260 struct nfs_lockt_args arg = {
4261 .fh = NFS_FH(inode),
4262 .fl = request,
4263 };
4264 struct nfs_lockt_res res = {
4265 .denied = request,
4266 };
4267 struct rpc_message msg = {
4268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4269 .rpc_argp = &arg,
4270 .rpc_resp = &res,
4271 .rpc_cred = state->owner->so_cred,
4272 };
4273 struct nfs4_lock_state *lsp;
4274 int status;
4275
4276 arg.lock_owner.clientid = clp->cl_clientid;
4277 status = nfs4_set_lock_state(state, request);
4278 if (status != 0)
4279 goto out;
4280 lsp = request->fl_u.nfs4_fl.owner;
4281 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4282 arg.lock_owner.s_dev = server->s_dev;
4283 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4284 switch (status) {
4285 case 0:
4286 request->fl_type = F_UNLCK;
4287 break;
4288 case -NFS4ERR_DENIED:
4289 status = 0;
4290 }
4291 request->fl_ops->fl_release_private(request);
4292out:
4293 return status;
4294}
4295
4296static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4297{
4298 struct nfs4_exception exception = { };
4299 int err;
4300
4301 do {
4302 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4303 _nfs4_proc_getlk(state, cmd, request),
4304 &exception);
4305 } while (exception.retry);
4306 return err;
4307}
4308
4309static int do_vfs_lock(struct file *file, struct file_lock *fl)
4310{
4311 int res = 0;
4312 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4313 case FL_POSIX:
4314 res = posix_lock_file_wait(file, fl);
4315 break;
4316 case FL_FLOCK:
4317 res = flock_lock_file_wait(file, fl);
4318 break;
4319 default:
4320 BUG();
4321 }
4322 return res;
4323}
4324
4325struct nfs4_unlockdata {
4326 struct nfs_locku_args arg;
4327 struct nfs_locku_res res;
4328 struct nfs4_lock_state *lsp;
4329 struct nfs_open_context *ctx;
4330 struct file_lock fl;
4331 const struct nfs_server *server;
4332 unsigned long timestamp;
4333};
4334
4335static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4336 struct nfs_open_context *ctx,
4337 struct nfs4_lock_state *lsp,
4338 struct nfs_seqid *seqid)
4339{
4340 struct nfs4_unlockdata *p;
4341 struct inode *inode = lsp->ls_state->inode;
4342
4343 p = kzalloc(sizeof(*p), GFP_NOFS);
4344 if (p == NULL)
4345 return NULL;
4346 p->arg.fh = NFS_FH(inode);
4347 p->arg.fl = &p->fl;
4348 p->arg.seqid = seqid;
4349 p->res.seqid = seqid;
4350 p->arg.stateid = &lsp->ls_stateid;
4351 p->lsp = lsp;
4352 atomic_inc(&lsp->ls_count);
4353 /* Ensure we don't close file until we're done freeing locks! */
4354 p->ctx = get_nfs_open_context(ctx);
4355 memcpy(&p->fl, fl, sizeof(p->fl));
4356 p->server = NFS_SERVER(inode);
4357 return p;
4358}
4359
4360static void nfs4_locku_release_calldata(void *data)
4361{
4362 struct nfs4_unlockdata *calldata = data;
4363 nfs_free_seqid(calldata->arg.seqid);
4364 nfs4_put_lock_state(calldata->lsp);
4365 put_nfs_open_context(calldata->ctx);
4366 kfree(calldata);
4367}
4368
4369static void nfs4_locku_done(struct rpc_task *task, void *data)
4370{
4371 struct nfs4_unlockdata *calldata = data;
4372
4373 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4374 return;
4375 switch (task->tk_status) {
4376 case 0:
4377 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4378 &calldata->res.stateid);
4379 renew_lease(calldata->server, calldata->timestamp);
4380 break;
4381 case -NFS4ERR_BAD_STATEID:
4382 case -NFS4ERR_OLD_STATEID:
4383 case -NFS4ERR_STALE_STATEID:
4384 case -NFS4ERR_EXPIRED:
4385 break;
4386 default:
4387 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4388 rpc_restart_call_prepare(task);
4389 }
4390}
4391
4392static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4393{
4394 struct nfs4_unlockdata *calldata = data;
4395
4396 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4397 return;
4398 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4399 /* Note: exit _without_ running nfs4_locku_done */
4400 task->tk_action = NULL;
4401 return;
4402 }
4403 calldata->timestamp = jiffies;
4404 if (nfs4_setup_sequence(calldata->server,
4405 &calldata->arg.seq_args,
4406 &calldata->res.seq_res, task))
4407 return;
4408 rpc_call_start(task);
4409}
4410
4411static const struct rpc_call_ops nfs4_locku_ops = {
4412 .rpc_call_prepare = nfs4_locku_prepare,
4413 .rpc_call_done = nfs4_locku_done,
4414 .rpc_release = nfs4_locku_release_calldata,
4415};
4416
4417static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4418 struct nfs_open_context *ctx,
4419 struct nfs4_lock_state *lsp,
4420 struct nfs_seqid *seqid)
4421{
4422 struct nfs4_unlockdata *data;
4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4425 .rpc_cred = ctx->cred,
4426 };
4427 struct rpc_task_setup task_setup_data = {
4428 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4429 .rpc_message = &msg,
4430 .callback_ops = &nfs4_locku_ops,
4431 .workqueue = nfsiod_workqueue,
4432 .flags = RPC_TASK_ASYNC,
4433 };
4434
4435 /* Ensure this is an unlock - when canceling a lock, the
4436 * canceled lock is passed in, and it won't be an unlock.
4437 */
4438 fl->fl_type = F_UNLCK;
4439
4440 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4441 if (data == NULL) {
4442 nfs_free_seqid(seqid);
4443 return ERR_PTR(-ENOMEM);
4444 }
4445
4446 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4447 msg.rpc_argp = &data->arg;
4448 msg.rpc_resp = &data->res;
4449 task_setup_data.callback_data = data;
4450 return rpc_run_task(&task_setup_data);
4451}
4452
4453static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4454{
4455 struct nfs_inode *nfsi = NFS_I(state->inode);
4456 struct nfs_seqid *seqid;
4457 struct nfs4_lock_state *lsp;
4458 struct rpc_task *task;
4459 int status = 0;
4460 unsigned char fl_flags = request->fl_flags;
4461
4462 status = nfs4_set_lock_state(state, request);
4463 /* Unlock _before_ we do the RPC call */
4464 request->fl_flags |= FL_EXISTS;
4465 down_read(&nfsi->rwsem);
4466 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4467 up_read(&nfsi->rwsem);
4468 goto out;
4469 }
4470 up_read(&nfsi->rwsem);
4471 if (status != 0)
4472 goto out;
4473 /* Is this a delegated lock? */
4474 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4475 goto out;
4476 lsp = request->fl_u.nfs4_fl.owner;
4477 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4478 status = -ENOMEM;
4479 if (seqid == NULL)
4480 goto out;
4481 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4482 status = PTR_ERR(task);
4483 if (IS_ERR(task))
4484 goto out;
4485 status = nfs4_wait_for_completion_rpc_task(task);
4486 rpc_put_task(task);
4487out:
4488 request->fl_flags = fl_flags;
4489 return status;
4490}
4491
4492struct nfs4_lockdata {
4493 struct nfs_lock_args arg;
4494 struct nfs_lock_res res;
4495 struct nfs4_lock_state *lsp;
4496 struct nfs_open_context *ctx;
4497 struct file_lock fl;
4498 unsigned long timestamp;
4499 int rpc_status;
4500 int cancelled;
4501 struct nfs_server *server;
4502};
4503
4504static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4505 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4506 gfp_t gfp_mask)
4507{
4508 struct nfs4_lockdata *p;
4509 struct inode *inode = lsp->ls_state->inode;
4510 struct nfs_server *server = NFS_SERVER(inode);
4511
4512 p = kzalloc(sizeof(*p), gfp_mask);
4513 if (p == NULL)
4514 return NULL;
4515
4516 p->arg.fh = NFS_FH(inode);
4517 p->arg.fl = &p->fl;
4518 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4519 if (p->arg.open_seqid == NULL)
4520 goto out_free;
4521 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4522 if (p->arg.lock_seqid == NULL)
4523 goto out_free_seqid;
4524 p->arg.lock_stateid = &lsp->ls_stateid;
4525 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4526 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4527 p->arg.lock_owner.s_dev = server->s_dev;
4528 p->res.lock_seqid = p->arg.lock_seqid;
4529 p->lsp = lsp;
4530 p->server = server;
4531 atomic_inc(&lsp->ls_count);
4532 p->ctx = get_nfs_open_context(ctx);
4533 memcpy(&p->fl, fl, sizeof(p->fl));
4534 return p;
4535out_free_seqid:
4536 nfs_free_seqid(p->arg.open_seqid);
4537out_free:
4538 kfree(p);
4539 return NULL;
4540}
4541
4542static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4543{
4544 struct nfs4_lockdata *data = calldata;
4545 struct nfs4_state *state = data->lsp->ls_state;
4546
4547 dprintk("%s: begin!\n", __func__);
4548 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4549 return;
4550 /* Do we need to do an open_to_lock_owner? */
4551 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4552 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4553 return;
4554 data->arg.open_stateid = &state->stateid;
4555 data->arg.new_lock_owner = 1;
4556 data->res.open_seqid = data->arg.open_seqid;
4557 } else
4558 data->arg.new_lock_owner = 0;
4559 data->timestamp = jiffies;
4560 if (nfs4_setup_sequence(data->server,
4561 &data->arg.seq_args,
4562 &data->res.seq_res, task))
4563 return;
4564 rpc_call_start(task);
4565 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4566}
4567
4568static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4569{
4570 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4571 nfs4_lock_prepare(task, calldata);
4572}
4573
4574static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4575{
4576 struct nfs4_lockdata *data = calldata;
4577
4578 dprintk("%s: begin!\n", __func__);
4579
4580 if (!nfs4_sequence_done(task, &data->res.seq_res))
4581 return;
4582
4583 data->rpc_status = task->tk_status;
4584 if (data->arg.new_lock_owner != 0) {
4585 if (data->rpc_status == 0)
4586 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4587 else
4588 goto out;
4589 }
4590 if (data->rpc_status == 0) {
4591 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4592 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4593 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4594 }
4595out:
4596 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4597}
4598
4599static void nfs4_lock_release(void *calldata)
4600{
4601 struct nfs4_lockdata *data = calldata;
4602
4603 dprintk("%s: begin!\n", __func__);
4604 nfs_free_seqid(data->arg.open_seqid);
4605 if (data->cancelled != 0) {
4606 struct rpc_task *task;
4607 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4608 data->arg.lock_seqid);
4609 if (!IS_ERR(task))
4610 rpc_put_task_async(task);
4611 dprintk("%s: cancelling lock!\n", __func__);
4612 } else
4613 nfs_free_seqid(data->arg.lock_seqid);
4614 nfs4_put_lock_state(data->lsp);
4615 put_nfs_open_context(data->ctx);
4616 kfree(data);
4617 dprintk("%s: done!\n", __func__);
4618}
4619
4620static const struct rpc_call_ops nfs4_lock_ops = {
4621 .rpc_call_prepare = nfs4_lock_prepare,
4622 .rpc_call_done = nfs4_lock_done,
4623 .rpc_release = nfs4_lock_release,
4624};
4625
4626static const struct rpc_call_ops nfs4_recover_lock_ops = {
4627 .rpc_call_prepare = nfs4_recover_lock_prepare,
4628 .rpc_call_done = nfs4_lock_done,
4629 .rpc_release = nfs4_lock_release,
4630};
4631
4632static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4633{
4634 switch (error) {
4635 case -NFS4ERR_ADMIN_REVOKED:
4636 case -NFS4ERR_BAD_STATEID:
4637 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4638 if (new_lock_owner != 0 ||
4639 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4640 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4641 break;
4642 case -NFS4ERR_STALE_STATEID:
4643 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4644 case -NFS4ERR_EXPIRED:
4645 nfs4_schedule_lease_recovery(server->nfs_client);
4646 };
4647}
4648
4649static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4650{
4651 struct nfs4_lockdata *data;
4652 struct rpc_task *task;
4653 struct rpc_message msg = {
4654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4655 .rpc_cred = state->owner->so_cred,
4656 };
4657 struct rpc_task_setup task_setup_data = {
4658 .rpc_client = NFS_CLIENT(state->inode),
4659 .rpc_message = &msg,
4660 .callback_ops = &nfs4_lock_ops,
4661 .workqueue = nfsiod_workqueue,
4662 .flags = RPC_TASK_ASYNC,
4663 };
4664 int ret;
4665
4666 dprintk("%s: begin!\n", __func__);
4667 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4668 fl->fl_u.nfs4_fl.owner,
4669 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4670 if (data == NULL)
4671 return -ENOMEM;
4672 if (IS_SETLKW(cmd))
4673 data->arg.block = 1;
4674 if (recovery_type > NFS_LOCK_NEW) {
4675 if (recovery_type == NFS_LOCK_RECLAIM)
4676 data->arg.reclaim = NFS_LOCK_RECLAIM;
4677 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4678 }
4679 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4680 msg.rpc_argp = &data->arg;
4681 msg.rpc_resp = &data->res;
4682 task_setup_data.callback_data = data;
4683 task = rpc_run_task(&task_setup_data);
4684 if (IS_ERR(task))
4685 return PTR_ERR(task);
4686 ret = nfs4_wait_for_completion_rpc_task(task);
4687 if (ret == 0) {
4688 ret = data->rpc_status;
4689 if (ret)
4690 nfs4_handle_setlk_error(data->server, data->lsp,
4691 data->arg.new_lock_owner, ret);
4692 } else
4693 data->cancelled = 1;
4694 rpc_put_task(task);
4695 dprintk("%s: done, ret = %d!\n", __func__, ret);
4696 return ret;
4697}
4698
4699static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4700{
4701 struct nfs_server *server = NFS_SERVER(state->inode);
4702 struct nfs4_exception exception = {
4703 .inode = state->inode,
4704 };
4705 int err;
4706
4707 do {
4708 /* Cache the lock if possible... */
4709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4710 return 0;
4711 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4712 if (err != -NFS4ERR_DELAY)
4713 break;
4714 nfs4_handle_exception(server, err, &exception);
4715 } while (exception.retry);
4716 return err;
4717}
4718
4719static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4720{
4721 struct nfs_server *server = NFS_SERVER(state->inode);
4722 struct nfs4_exception exception = {
4723 .inode = state->inode,
4724 };
4725 int err;
4726
4727 err = nfs4_set_lock_state(state, request);
4728 if (err != 0)
4729 return err;
4730 do {
4731 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4732 return 0;
4733 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4734 switch (err) {
4735 default:
4736 goto out;
4737 case -NFS4ERR_GRACE:
4738 case -NFS4ERR_DELAY:
4739 nfs4_handle_exception(server, err, &exception);
4740 err = 0;
4741 }
4742 } while (exception.retry);
4743out:
4744 return err;
4745}
4746
4747#if defined(CONFIG_NFS_V4_1)
4748/**
4749 * nfs41_check_expired_locks - possibly free a lock stateid
4750 *
4751 * @state: NFSv4 state for an inode
4752 *
4753 * Returns NFS_OK if recovery for this stateid is now finished.
4754 * Otherwise a negative NFS4ERR value is returned.
4755 */
4756static int nfs41_check_expired_locks(struct nfs4_state *state)
4757{
4758 int status, ret = -NFS4ERR_BAD_STATEID;
4759 struct nfs4_lock_state *lsp;
4760 struct nfs_server *server = NFS_SERVER(state->inode);
4761
4762 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4763 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4764 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4765 if (status != NFS_OK) {
4766 /* Free the stateid unless the server
4767 * informs us the stateid is unrecognized. */
4768 if (status != -NFS4ERR_BAD_STATEID)
4769 nfs41_free_stateid(server,
4770 &lsp->ls_stateid);
4771 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4772 ret = status;
4773 }
4774 }
4775 };
4776
4777 return ret;
4778}
4779
4780static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4781{
4782 int status = NFS_OK;
4783
4784 if (test_bit(LK_STATE_IN_USE, &state->flags))
4785 status = nfs41_check_expired_locks(state);
4786 if (status != NFS_OK)
4787 status = nfs4_lock_expired(state, request);
4788 return status;
4789}
4790#endif
4791
4792static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4793{
4794 struct nfs_inode *nfsi = NFS_I(state->inode);
4795 unsigned char fl_flags = request->fl_flags;
4796 int status = -ENOLCK;
4797
4798 if ((fl_flags & FL_POSIX) &&
4799 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4800 goto out;
4801 /* Is this a delegated open? */
4802 status = nfs4_set_lock_state(state, request);
4803 if (status != 0)
4804 goto out;
4805 request->fl_flags |= FL_ACCESS;
4806 status = do_vfs_lock(request->fl_file, request);
4807 if (status < 0)
4808 goto out;
4809 down_read(&nfsi->rwsem);
4810 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4811 /* Yes: cache locks! */
4812 /* ...but avoid races with delegation recall... */
4813 request->fl_flags = fl_flags & ~FL_SLEEP;
4814 status = do_vfs_lock(request->fl_file, request);
4815 goto out_unlock;
4816 }
4817 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4818 if (status != 0)
4819 goto out_unlock;
4820 /* Note: we always want to sleep here! */
4821 request->fl_flags = fl_flags | FL_SLEEP;
4822 if (do_vfs_lock(request->fl_file, request) < 0)
4823 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4824 "manager!\n", __func__);
4825out_unlock:
4826 up_read(&nfsi->rwsem);
4827out:
4828 request->fl_flags = fl_flags;
4829 return status;
4830}
4831
4832static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4833{
4834 struct nfs4_exception exception = {
4835 .state = state,
4836 .inode = state->inode,
4837 };
4838 int err;
4839
4840 do {
4841 err = _nfs4_proc_setlk(state, cmd, request);
4842 if (err == -NFS4ERR_DENIED)
4843 err = -EAGAIN;
4844 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4845 err, &exception);
4846 } while (exception.retry);
4847 return err;
4848}
4849
4850static int
4851nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4852{
4853 struct nfs_open_context *ctx;
4854 struct nfs4_state *state;
4855 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4856 int status;
4857
4858 /* verify open state */
4859 ctx = nfs_file_open_context(filp);
4860 state = ctx->state;
4861
4862 if (request->fl_start < 0 || request->fl_end < 0)
4863 return -EINVAL;
4864
4865 if (IS_GETLK(cmd)) {
4866 if (state != NULL)
4867 return nfs4_proc_getlk(state, F_GETLK, request);
4868 return 0;
4869 }
4870
4871 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4872 return -EINVAL;
4873
4874 if (request->fl_type == F_UNLCK) {
4875 if (state != NULL)
4876 return nfs4_proc_unlck(state, cmd, request);
4877 return 0;
4878 }
4879
4880 if (state == NULL)
4881 return -ENOLCK;
4882 /*
4883 * Don't rely on the VFS having checked the file open mode,
4884 * since it won't do this for flock() locks.
4885 */
4886 switch (request->fl_type) {
4887 case F_RDLCK:
4888 if (!(filp->f_mode & FMODE_READ))
4889 return -EBADF;
4890 break;
4891 case F_WRLCK:
4892 if (!(filp->f_mode & FMODE_WRITE))
4893 return -EBADF;
4894 }
4895
4896 do {
4897 status = nfs4_proc_setlk(state, cmd, request);
4898 if ((status != -EAGAIN) || IS_SETLK(cmd))
4899 break;
4900 timeout = nfs4_set_lock_task_retry(timeout);
4901 status = -ERESTARTSYS;
4902 if (signalled())
4903 break;
4904 } while(status < 0);
4905 return status;
4906}
4907
4908int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4909{
4910 struct nfs_server *server = NFS_SERVER(state->inode);
4911 struct nfs4_exception exception = { };
4912 int err;
4913
4914 err = nfs4_set_lock_state(state, fl);
4915 if (err != 0)
4916 goto out;
4917 do {
4918 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4919 switch (err) {
4920 default:
4921 printk(KERN_ERR "NFS: %s: unhandled error "
4922 "%d.\n", __func__, err);
4923 case 0:
4924 case -ESTALE:
4925 goto out;
4926 case -NFS4ERR_EXPIRED:
4927 nfs4_schedule_stateid_recovery(server, state);
4928 case -NFS4ERR_STALE_CLIENTID:
4929 case -NFS4ERR_STALE_STATEID:
4930 nfs4_schedule_lease_recovery(server->nfs_client);
4931 goto out;
4932 case -NFS4ERR_BADSESSION:
4933 case -NFS4ERR_BADSLOT:
4934 case -NFS4ERR_BAD_HIGH_SLOT:
4935 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4936 case -NFS4ERR_DEADSESSION:
4937 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4938 goto out;
4939 case -ERESTARTSYS:
4940 /*
4941 * The show must go on: exit, but mark the
4942 * stateid as needing recovery.
4943 */
4944 case -NFS4ERR_DELEG_REVOKED:
4945 case -NFS4ERR_ADMIN_REVOKED:
4946 case -NFS4ERR_BAD_STATEID:
4947 case -NFS4ERR_OPENMODE:
4948 nfs4_schedule_stateid_recovery(server, state);
4949 err = 0;
4950 goto out;
4951 case -EKEYEXPIRED:
4952 /*
4953 * User RPCSEC_GSS context has expired.
4954 * We cannot recover this stateid now, so
4955 * skip it and allow recovery thread to
4956 * proceed.
4957 */
4958 err = 0;
4959 goto out;
4960 case -ENOMEM:
4961 case -NFS4ERR_DENIED:
4962 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4963 err = 0;
4964 goto out;
4965 case -NFS4ERR_DELAY:
4966 break;
4967 }
4968 err = nfs4_handle_exception(server, err, &exception);
4969 } while (exception.retry);
4970out:
4971 return err;
4972}
4973
4974struct nfs_release_lockowner_data {
4975 struct nfs4_lock_state *lsp;
4976 struct nfs_server *server;
4977 struct nfs_release_lockowner_args args;
4978};
4979
4980static void nfs4_release_lockowner_release(void *calldata)
4981{
4982 struct nfs_release_lockowner_data *data = calldata;
4983 nfs4_free_lock_state(data->server, data->lsp);
4984 kfree(calldata);
4985}
4986
4987static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4988 .rpc_release = nfs4_release_lockowner_release,
4989};
4990
4991int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4992{
4993 struct nfs_server *server = lsp->ls_state->owner->so_server;
4994 struct nfs_release_lockowner_data *data;
4995 struct rpc_message msg = {
4996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4997 };
4998
4999 if (server->nfs_client->cl_mvops->minor_version != 0)
5000 return -EINVAL;
5001 data = kmalloc(sizeof(*data), GFP_NOFS);
5002 if (!data)
5003 return -ENOMEM;
5004 data->lsp = lsp;
5005 data->server = server;
5006 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5007 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5008 data->args.lock_owner.s_dev = server->s_dev;
5009 msg.rpc_argp = &data->args;
5010 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5011 return 0;
5012}
5013
5014#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5015
5016static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5017 const void *buf, size_t buflen,
5018 int flags, int type)
5019{
5020 if (strcmp(key, "") != 0)
5021 return -EINVAL;
5022
5023 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5024}
5025
5026static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5027 void *buf, size_t buflen, int type)
5028{
5029 if (strcmp(key, "") != 0)
5030 return -EINVAL;
5031
5032 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5033}
5034
5035static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5036 size_t list_len, const char *name,
5037 size_t name_len, int type)
5038{
5039 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5040
5041 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5042 return 0;
5043
5044 if (list && len <= list_len)
5045 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5046 return len;
5047}
5048
5049/*
5050 * nfs_fhget will use either the mounted_on_fileid or the fileid
5051 */
5052static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5053{
5054 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5055 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5056 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5057 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5058 return;
5059
5060 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5061 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5062 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5063 fattr->nlink = 2;
5064}
5065
5066static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5067 const struct qstr *name,
5068 struct nfs4_fs_locations *fs_locations,
5069 struct page *page)
5070{
5071 struct nfs_server *server = NFS_SERVER(dir);
5072 u32 bitmask[2] = {
5073 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5074 };
5075 struct nfs4_fs_locations_arg args = {
5076 .dir_fh = NFS_FH(dir),
5077 .name = name,
5078 .page = page,
5079 .bitmask = bitmask,
5080 };
5081 struct nfs4_fs_locations_res res = {
5082 .fs_locations = fs_locations,
5083 };
5084 struct rpc_message msg = {
5085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5086 .rpc_argp = &args,
5087 .rpc_resp = &res,
5088 };
5089 int status;
5090
5091 dprintk("%s: start\n", __func__);
5092
5093 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5094 * is not supported */
5095 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5096 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5097 else
5098 bitmask[0] |= FATTR4_WORD0_FILEID;
5099
5100 nfs_fattr_init(&fs_locations->fattr);
5101 fs_locations->server = server;
5102 fs_locations->nlocations = 0;
5103 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5104 dprintk("%s: returned status = %d\n", __func__, status);
5105 return status;
5106}
5107
5108int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5109 const struct qstr *name,
5110 struct nfs4_fs_locations *fs_locations,
5111 struct page *page)
5112{
5113 struct nfs4_exception exception = { };
5114 int err;
5115 do {
5116 err = nfs4_handle_exception(NFS_SERVER(dir),
5117 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5118 &exception);
5119 } while (exception.retry);
5120 return err;
5121}
5122
5123static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5124{
5125 int status;
5126 struct nfs4_secinfo_arg args = {
5127 .dir_fh = NFS_FH(dir),
5128 .name = name,
5129 };
5130 struct nfs4_secinfo_res res = {
5131 .flavors = flavors,
5132 };
5133 struct rpc_message msg = {
5134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5135 .rpc_argp = &args,
5136 .rpc_resp = &res,
5137 };
5138
5139 dprintk("NFS call secinfo %s\n", name->name);
5140 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5141 dprintk("NFS reply secinfo: %d\n", status);
5142 return status;
5143}
5144
5145int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5146 struct nfs4_secinfo_flavors *flavors)
5147{
5148 struct nfs4_exception exception = { };
5149 int err;
5150 do {
5151 err = nfs4_handle_exception(NFS_SERVER(dir),
5152 _nfs4_proc_secinfo(dir, name, flavors),
5153 &exception);
5154 } while (exception.retry);
5155 return err;
5156}
5157
5158#ifdef CONFIG_NFS_V4_1
5159/*
5160 * Check the exchange flags returned by the server for invalid flags, having
5161 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5162 * DS flags set.
5163 */
5164static int nfs4_check_cl_exchange_flags(u32 flags)
5165{
5166 if (flags & ~EXCHGID4_FLAG_MASK_R)
5167 goto out_inval;
5168 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5169 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5170 goto out_inval;
5171 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5172 goto out_inval;
5173 return NFS_OK;
5174out_inval:
5175 return -NFS4ERR_INVAL;
5176}
5177
5178static bool
5179nfs41_same_server_scope(struct nfs41_server_scope *a,
5180 struct nfs41_server_scope *b)
5181{
5182 if (a->server_scope_sz == b->server_scope_sz &&
5183 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5184 return true;
5185
5186 return false;
5187}
5188
5189/*
5190 * nfs4_proc_bind_conn_to_session()
5191 *
5192 * The 4.1 client currently uses the same TCP connection for the
5193 * fore and backchannel.
5194 */
5195int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5196{
5197 int status;
5198 struct nfs41_bind_conn_to_session_res res;
5199 struct rpc_message msg = {
5200 .rpc_proc =
5201 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5202 .rpc_argp = clp,
5203 .rpc_resp = &res,
5204 .rpc_cred = cred,
5205 };
5206
5207 dprintk("--> %s\n", __func__);
5208 BUG_ON(clp == NULL);
5209
5210 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5211 if (unlikely(res.session == NULL)) {
5212 status = -ENOMEM;
5213 goto out;
5214 }
5215
5216 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5217 if (status == 0) {
5218 if (memcmp(res.session->sess_id.data,
5219 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5220 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5221 status = -EIO;
5222 goto out_session;
5223 }
5224 if (res.dir != NFS4_CDFS4_BOTH) {
5225 dprintk("NFS: %s: Unexpected direction from server\n",
5226 __func__);
5227 status = -EIO;
5228 goto out_session;
5229 }
5230 if (res.use_conn_in_rdma_mode) {
5231 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5232 __func__);
5233 status = -EIO;
5234 goto out_session;
5235 }
5236 }
5237out_session:
5238 kfree(res.session);
5239out:
5240 dprintk("<-- %s status= %d\n", __func__, status);
5241 return status;
5242}
5243
5244/*
5245 * nfs4_proc_exchange_id()
5246 *
5247 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5248 *
5249 * Since the clientid has expired, all compounds using sessions
5250 * associated with the stale clientid will be returning
5251 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5252 * be in some phase of session reset.
5253 */
5254int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5255{
5256 nfs4_verifier verifier;
5257 struct nfs41_exchange_id_args args = {
5258 .verifier = &verifier,
5259 .client = clp,
5260 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5261 };
5262 struct nfs41_exchange_id_res res = {
5263 0
5264 };
5265 int status;
5266 struct rpc_message msg = {
5267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5268 .rpc_argp = &args,
5269 .rpc_resp = &res,
5270 .rpc_cred = cred,
5271 };
5272
5273 nfs4_init_boot_verifier(clp, &verifier);
5274 args.id_len = scnprintf(args.id, sizeof(args.id),
5275 "%s/%s",
5276 clp->cl_ipaddr,
5277 clp->cl_rpcclient->cl_nodename);
5278 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5279 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5280 args.id_len, args.id);
5281
5282 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5283 GFP_NOFS);
5284 if (unlikely(res.server_owner == NULL)) {
5285 status = -ENOMEM;
5286 goto out;
5287 }
5288
5289 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5290 GFP_NOFS);
5291 if (unlikely(res.server_scope == NULL)) {
5292 status = -ENOMEM;
5293 goto out_server_owner;
5294 }
5295
5296 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5297 if (unlikely(res.impl_id == NULL)) {
5298 status = -ENOMEM;
5299 goto out_server_scope;
5300 }
5301
5302 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5303 if (status == 0)
5304 status = nfs4_check_cl_exchange_flags(res.flags);
5305
5306 if (status == 0) {
5307 clp->cl_clientid = res.clientid;
5308 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5309 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5310 clp->cl_seqid = res.seqid;
5311
5312 kfree(clp->cl_serverowner);
5313 clp->cl_serverowner = res.server_owner;
5314 res.server_owner = NULL;
5315
5316 /* use the most recent implementation id */
5317 kfree(clp->cl_implid);
5318 clp->cl_implid = res.impl_id;
5319
5320 if (clp->cl_serverscope != NULL &&
5321 !nfs41_same_server_scope(clp->cl_serverscope,
5322 res.server_scope)) {
5323 dprintk("%s: server_scope mismatch detected\n",
5324 __func__);
5325 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5326 kfree(clp->cl_serverscope);
5327 clp->cl_serverscope = NULL;
5328 }
5329
5330 if (clp->cl_serverscope == NULL) {
5331 clp->cl_serverscope = res.server_scope;
5332 goto out;
5333 }
5334 } else
5335 kfree(res.impl_id);
5336
5337out_server_owner:
5338 kfree(res.server_owner);
5339out_server_scope:
5340 kfree(res.server_scope);
5341out:
5342 if (clp->cl_implid != NULL)
5343 dprintk("NFS reply exchange_id: Server Implementation ID: "
5344 "domain: %s, name: %s, date: %llu,%u\n",
5345 clp->cl_implid->domain, clp->cl_implid->name,
5346 clp->cl_implid->date.seconds,
5347 clp->cl_implid->date.nseconds);
5348 dprintk("NFS reply exchange_id: %d\n", status);
5349 return status;
5350}
5351
5352static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5353 struct rpc_cred *cred)
5354{
5355 struct rpc_message msg = {
5356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5357 .rpc_argp = clp,
5358 .rpc_cred = cred,
5359 };
5360 int status;
5361
5362 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5363 if (status)
5364 dprintk("NFS: Got error %d from the server %s on "
5365 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5366 return status;
5367}
5368
5369static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5370 struct rpc_cred *cred)
5371{
5372 unsigned int loop;
5373 int ret;
5374
5375 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5376 ret = _nfs4_proc_destroy_clientid(clp, cred);
5377 switch (ret) {
5378 case -NFS4ERR_DELAY:
5379 case -NFS4ERR_CLIENTID_BUSY:
5380 ssleep(1);
5381 break;
5382 default:
5383 return ret;
5384 }
5385 }
5386 return 0;
5387}
5388
5389int nfs4_destroy_clientid(struct nfs_client *clp)
5390{
5391 struct rpc_cred *cred;
5392 int ret = 0;
5393
5394 if (clp->cl_mvops->minor_version < 1)
5395 goto out;
5396 if (clp->cl_exchange_flags == 0)
5397 goto out;
5398 cred = nfs4_get_exchange_id_cred(clp);
5399 ret = nfs4_proc_destroy_clientid(clp, cred);
5400 if (cred)
5401 put_rpccred(cred);
5402 switch (ret) {
5403 case 0:
5404 case -NFS4ERR_STALE_CLIENTID:
5405 clp->cl_exchange_flags = 0;
5406 }
5407out:
5408 return ret;
5409}
5410
5411struct nfs4_get_lease_time_data {
5412 struct nfs4_get_lease_time_args *args;
5413 struct nfs4_get_lease_time_res *res;
5414 struct nfs_client *clp;
5415};
5416
5417static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5418 void *calldata)
5419{
5420 int ret;
5421 struct nfs4_get_lease_time_data *data =
5422 (struct nfs4_get_lease_time_data *)calldata;
5423
5424 dprintk("--> %s\n", __func__);
5425 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5426 /* just setup sequence, do not trigger session recovery
5427 since we're invoked within one */
5428 ret = nfs41_setup_sequence(data->clp->cl_session,
5429 &data->args->la_seq_args,
5430 &data->res->lr_seq_res, task);
5431
5432 BUG_ON(ret == -EAGAIN);
5433 rpc_call_start(task);
5434 dprintk("<-- %s\n", __func__);
5435}
5436
5437/*
5438 * Called from nfs4_state_manager thread for session setup, so don't recover
5439 * from sequence operation or clientid errors.
5440 */
5441static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5442{
5443 struct nfs4_get_lease_time_data *data =
5444 (struct nfs4_get_lease_time_data *)calldata;
5445
5446 dprintk("--> %s\n", __func__);
5447 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5448 return;
5449 switch (task->tk_status) {
5450 case -NFS4ERR_DELAY:
5451 case -NFS4ERR_GRACE:
5452 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5453 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5454 task->tk_status = 0;
5455 /* fall through */
5456 case -NFS4ERR_RETRY_UNCACHED_REP:
5457 rpc_restart_call_prepare(task);
5458 return;
5459 }
5460 dprintk("<-- %s\n", __func__);
5461}
5462
5463static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5464 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5465 .rpc_call_done = nfs4_get_lease_time_done,
5466};
5467
5468int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5469{
5470 struct rpc_task *task;
5471 struct nfs4_get_lease_time_args args;
5472 struct nfs4_get_lease_time_res res = {
5473 .lr_fsinfo = fsinfo,
5474 };
5475 struct nfs4_get_lease_time_data data = {
5476 .args = &args,
5477 .res = &res,
5478 .clp = clp,
5479 };
5480 struct rpc_message msg = {
5481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5482 .rpc_argp = &args,
5483 .rpc_resp = &res,
5484 };
5485 struct rpc_task_setup task_setup = {
5486 .rpc_client = clp->cl_rpcclient,
5487 .rpc_message = &msg,
5488 .callback_ops = &nfs4_get_lease_time_ops,
5489 .callback_data = &data,
5490 .flags = RPC_TASK_TIMEOUT,
5491 };
5492 int status;
5493
5494 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5495 dprintk("--> %s\n", __func__);
5496 task = rpc_run_task(&task_setup);
5497
5498 if (IS_ERR(task))
5499 status = PTR_ERR(task);
5500 else {
5501 status = task->tk_status;
5502 rpc_put_task(task);
5503 }
5504 dprintk("<-- %s return %d\n", __func__, status);
5505
5506 return status;
5507}
5508
5509static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5510{
5511 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5512}
5513
5514static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5515 struct nfs4_slot *new,
5516 u32 max_slots,
5517 u32 ivalue)
5518{
5519 struct nfs4_slot *old = NULL;
5520 u32 i;
5521
5522 spin_lock(&tbl->slot_tbl_lock);
5523 if (new) {
5524 old = tbl->slots;
5525 tbl->slots = new;
5526 tbl->max_slots = max_slots;
5527 }
5528 tbl->highest_used_slotid = -1; /* no slot is currently used */
5529 for (i = 0; i < tbl->max_slots; i++)
5530 tbl->slots[i].seq_nr = ivalue;
5531 spin_unlock(&tbl->slot_tbl_lock);
5532 kfree(old);
5533}
5534
5535/*
5536 * (re)Initialise a slot table
5537 */
5538static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5539 u32 ivalue)
5540{
5541 struct nfs4_slot *new = NULL;
5542 int ret = -ENOMEM;
5543
5544 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5545 max_reqs, tbl->max_slots);
5546
5547 /* Does the newly negotiated max_reqs match the existing slot table? */
5548 if (max_reqs != tbl->max_slots) {
5549 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5550 if (!new)
5551 goto out;
5552 }
5553 ret = 0;
5554
5555 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5556 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5557 tbl, tbl->slots, tbl->max_slots);
5558out:
5559 dprintk("<-- %s: return %d\n", __func__, ret);
5560 return ret;
5561}
5562
5563/* Destroy the slot table */
5564static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5565{
5566 if (session->fc_slot_table.slots != NULL) {
5567 kfree(session->fc_slot_table.slots);
5568 session->fc_slot_table.slots = NULL;
5569 }
5570 if (session->bc_slot_table.slots != NULL) {
5571 kfree(session->bc_slot_table.slots);
5572 session->bc_slot_table.slots = NULL;
5573 }
5574 return;
5575}
5576
5577/*
5578 * Initialize or reset the forechannel and backchannel tables
5579 */
5580static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5581{
5582 struct nfs4_slot_table *tbl;
5583 int status;
5584
5585 dprintk("--> %s\n", __func__);
5586 /* Fore channel */
5587 tbl = &ses->fc_slot_table;
5588 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5589 if (status) /* -ENOMEM */
5590 return status;
5591 /* Back channel */
5592 tbl = &ses->bc_slot_table;
5593 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5594 if (status && tbl->slots == NULL)
5595 /* Fore and back channel share a connection so get
5596 * both slot tables or neither */
5597 nfs4_destroy_slot_tables(ses);
5598 return status;
5599}
5600
5601struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5602{
5603 struct nfs4_session *session;
5604 struct nfs4_slot_table *tbl;
5605
5606 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5607 if (!session)
5608 return NULL;
5609
5610 tbl = &session->fc_slot_table;
5611 tbl->highest_used_slotid = NFS4_NO_SLOT;
5612 spin_lock_init(&tbl->slot_tbl_lock);
5613 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5614 init_completion(&tbl->complete);
5615
5616 tbl = &session->bc_slot_table;
5617 tbl->highest_used_slotid = NFS4_NO_SLOT;
5618 spin_lock_init(&tbl->slot_tbl_lock);
5619 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5620 init_completion(&tbl->complete);
5621
5622 session->session_state = 1<<NFS4_SESSION_INITING;
5623
5624 session->clp = clp;
5625 return session;
5626}
5627
5628void nfs4_destroy_session(struct nfs4_session *session)
5629{
5630 struct rpc_xprt *xprt;
5631 struct rpc_cred *cred;
5632
5633 cred = nfs4_get_exchange_id_cred(session->clp);
5634 nfs4_proc_destroy_session(session, cred);
5635 if (cred)
5636 put_rpccred(cred);
5637
5638 rcu_read_lock();
5639 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5640 rcu_read_unlock();
5641 dprintk("%s Destroy backchannel for xprt %p\n",
5642 __func__, xprt);
5643 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5644 nfs4_destroy_slot_tables(session);
5645 kfree(session);
5646}
5647
5648/*
5649 * Initialize the values to be used by the client in CREATE_SESSION
5650 * If nfs4_init_session set the fore channel request and response sizes,
5651 * use them.
5652 *
5653 * Set the back channel max_resp_sz_cached to zero to force the client to
5654 * always set csa_cachethis to FALSE because the current implementation
5655 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5656 */
5657static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5658{
5659 struct nfs4_session *session = args->client->cl_session;
5660 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5661 mxresp_sz = session->fc_attrs.max_resp_sz;
5662
5663 if (mxrqst_sz == 0)
5664 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5665 if (mxresp_sz == 0)
5666 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5667 /* Fore channel attributes */
5668 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5669 args->fc_attrs.max_resp_sz = mxresp_sz;
5670 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5671 args->fc_attrs.max_reqs = max_session_slots;
5672
5673 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5674 "max_ops=%u max_reqs=%u\n",
5675 __func__,
5676 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5677 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5678
5679 /* Back channel attributes */
5680 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5681 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5682 args->bc_attrs.max_resp_sz_cached = 0;
5683 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5684 args->bc_attrs.max_reqs = 1;
5685
5686 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5687 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5688 __func__,
5689 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5690 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5691 args->bc_attrs.max_reqs);
5692}
5693
5694static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5695{
5696 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5697 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5698
5699 if (rcvd->max_resp_sz > sent->max_resp_sz)
5700 return -EINVAL;
5701 /*
5702 * Our requested max_ops is the minimum we need; we're not
5703 * prepared to break up compounds into smaller pieces than that.
5704 * So, no point even trying to continue if the server won't
5705 * cooperate:
5706 */
5707 if (rcvd->max_ops < sent->max_ops)
5708 return -EINVAL;
5709 if (rcvd->max_reqs == 0)
5710 return -EINVAL;
5711 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5712 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5713 return 0;
5714}
5715
5716static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5717{
5718 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5719 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5720
5721 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5722 return -EINVAL;
5723 if (rcvd->max_resp_sz < sent->max_resp_sz)
5724 return -EINVAL;
5725 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5726 return -EINVAL;
5727 /* These would render the backchannel useless: */
5728 if (rcvd->max_ops != sent->max_ops)
5729 return -EINVAL;
5730 if (rcvd->max_reqs != sent->max_reqs)
5731 return -EINVAL;
5732 return 0;
5733}
5734
5735static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5736 struct nfs4_session *session)
5737{
5738 int ret;
5739
5740 ret = nfs4_verify_fore_channel_attrs(args, session);
5741 if (ret)
5742 return ret;
5743 return nfs4_verify_back_channel_attrs(args, session);
5744}
5745
5746static int _nfs4_proc_create_session(struct nfs_client *clp,
5747 struct rpc_cred *cred)
5748{
5749 struct nfs4_session *session = clp->cl_session;
5750 struct nfs41_create_session_args args = {
5751 .client = clp,
5752 .cb_program = NFS4_CALLBACK,
5753 };
5754 struct nfs41_create_session_res res = {
5755 .client = clp,
5756 };
5757 struct rpc_message msg = {
5758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5759 .rpc_argp = &args,
5760 .rpc_resp = &res,
5761 .rpc_cred = cred,
5762 };
5763 int status;
5764
5765 nfs4_init_channel_attrs(&args);
5766 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5767
5768 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5769
5770 if (!status)
5771 /* Verify the session's negotiated channel_attrs values */
5772 status = nfs4_verify_channel_attrs(&args, session);
5773 if (!status) {
5774 /* Increment the clientid slot sequence id */
5775 clp->cl_seqid++;
5776 }
5777
5778 return status;
5779}
5780
5781/*
5782 * Issues a CREATE_SESSION operation to the server.
5783 * It is the responsibility of the caller to verify the session is
5784 * expired before calling this routine.
5785 */
5786int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5787{
5788 int status;
5789 unsigned *ptr;
5790 struct nfs4_session *session = clp->cl_session;
5791
5792 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5793
5794 status = _nfs4_proc_create_session(clp, cred);
5795 if (status)
5796 goto out;
5797
5798 /* Init or reset the session slot tables */
5799 status = nfs4_setup_session_slot_tables(session);
5800 dprintk("slot table setup returned %d\n", status);
5801 if (status)
5802 goto out;
5803
5804 ptr = (unsigned *)&session->sess_id.data[0];
5805 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5806 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5807out:
5808 dprintk("<-- %s\n", __func__);
5809 return status;
5810}
5811
5812/*
5813 * Issue the over-the-wire RPC DESTROY_SESSION.
5814 * The caller must serialize access to this routine.
5815 */
5816int nfs4_proc_destroy_session(struct nfs4_session *session,
5817 struct rpc_cred *cred)
5818{
5819 struct rpc_message msg = {
5820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5821 .rpc_argp = session,
5822 .rpc_cred = cred,
5823 };
5824 int status = 0;
5825
5826 dprintk("--> nfs4_proc_destroy_session\n");
5827
5828 /* session is still being setup */
5829 if (session->clp->cl_cons_state != NFS_CS_READY)
5830 return status;
5831
5832 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5833
5834 if (status)
5835 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5836 "Session has been destroyed regardless...\n", status);
5837
5838 dprintk("<-- nfs4_proc_destroy_session\n");
5839 return status;
5840}
5841
5842/*
5843 * With sessions, the client is not marked ready until after a
5844 * successful EXCHANGE_ID and CREATE_SESSION.
5845 *
5846 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5847 * other versions of NFS can be tried.
5848 */
5849static int nfs41_check_session_ready(struct nfs_client *clp)
5850{
5851 int ret;
5852
5853 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5854 ret = nfs4_client_recover_expired_lease(clp);
5855 if (ret)
5856 return ret;
5857 }
5858 if (clp->cl_cons_state < NFS_CS_READY)
5859 return -EPROTONOSUPPORT;
5860 smp_rmb();
5861 return 0;
5862}
5863
5864int nfs4_init_session(struct nfs_server *server)
5865{
5866 struct nfs_client *clp = server->nfs_client;
5867 struct nfs4_session *session;
5868 unsigned int rsize, wsize;
5869
5870 if (!nfs4_has_session(clp))
5871 return 0;
5872
5873 session = clp->cl_session;
5874 spin_lock(&clp->cl_lock);
5875 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5876
5877 rsize = server->rsize;
5878 if (rsize == 0)
5879 rsize = NFS_MAX_FILE_IO_SIZE;
5880 wsize = server->wsize;
5881 if (wsize == 0)
5882 wsize = NFS_MAX_FILE_IO_SIZE;
5883
5884 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5885 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5886 }
5887 spin_unlock(&clp->cl_lock);
5888
5889 return nfs41_check_session_ready(clp);
5890}
5891
5892int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
5893{
5894 struct nfs4_session *session = clp->cl_session;
5895 int ret;
5896
5897 spin_lock(&clp->cl_lock);
5898 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5899 /*
5900 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5901 * DS lease to be equal to the MDS lease.
5902 */
5903 clp->cl_lease_time = lease_time;
5904 clp->cl_last_renewal = jiffies;
5905 }
5906 spin_unlock(&clp->cl_lock);
5907
5908 ret = nfs41_check_session_ready(clp);
5909 if (ret)
5910 return ret;
5911 /* Test for the DS role */
5912 if (!is_ds_client(clp))
5913 return -ENODEV;
5914 return 0;
5915}
5916EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5917
5918
5919/*
5920 * Renew the cl_session lease.
5921 */
5922struct nfs4_sequence_data {
5923 struct nfs_client *clp;
5924 struct nfs4_sequence_args args;
5925 struct nfs4_sequence_res res;
5926};
5927
5928static void nfs41_sequence_release(void *data)
5929{
5930 struct nfs4_sequence_data *calldata = data;
5931 struct nfs_client *clp = calldata->clp;
5932
5933 if (atomic_read(&clp->cl_count) > 1)
5934 nfs4_schedule_state_renewal(clp);
5935 nfs_put_client(clp);
5936 kfree(calldata);
5937}
5938
5939static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5940{
5941 switch(task->tk_status) {
5942 case -NFS4ERR_DELAY:
5943 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5944 return -EAGAIN;
5945 default:
5946 nfs4_schedule_lease_recovery(clp);
5947 }
5948 return 0;
5949}
5950
5951static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5952{
5953 struct nfs4_sequence_data *calldata = data;
5954 struct nfs_client *clp = calldata->clp;
5955
5956 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5957 return;
5958
5959 if (task->tk_status < 0) {
5960 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5961 if (atomic_read(&clp->cl_count) == 1)
5962 goto out;
5963
5964 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5965 rpc_restart_call_prepare(task);
5966 return;
5967 }
5968 }
5969 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5970out:
5971 dprintk("<-- %s\n", __func__);
5972}
5973
5974static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5975{
5976 struct nfs4_sequence_data *calldata = data;
5977 struct nfs_client *clp = calldata->clp;
5978 struct nfs4_sequence_args *args;
5979 struct nfs4_sequence_res *res;
5980
5981 args = task->tk_msg.rpc_argp;
5982 res = task->tk_msg.rpc_resp;
5983
5984 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5985 return;
5986 rpc_call_start(task);
5987}
5988
5989static const struct rpc_call_ops nfs41_sequence_ops = {
5990 .rpc_call_done = nfs41_sequence_call_done,
5991 .rpc_call_prepare = nfs41_sequence_prepare,
5992 .rpc_release = nfs41_sequence_release,
5993};
5994
5995static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5996{
5997 struct nfs4_sequence_data *calldata;
5998 struct rpc_message msg = {
5999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6000 .rpc_cred = cred,
6001 };
6002 struct rpc_task_setup task_setup_data = {
6003 .rpc_client = clp->cl_rpcclient,
6004 .rpc_message = &msg,
6005 .callback_ops = &nfs41_sequence_ops,
6006 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6007 };
6008
6009 if (!atomic_inc_not_zero(&clp->cl_count))
6010 return ERR_PTR(-EIO);
6011 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6012 if (calldata == NULL) {
6013 nfs_put_client(clp);
6014 return ERR_PTR(-ENOMEM);
6015 }
6016 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6017 msg.rpc_argp = &calldata->args;
6018 msg.rpc_resp = &calldata->res;
6019 calldata->clp = clp;
6020 task_setup_data.callback_data = calldata;
6021
6022 return rpc_run_task(&task_setup_data);
6023}
6024
6025static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6026{
6027 struct rpc_task *task;
6028 int ret = 0;
6029
6030 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6031 return 0;
6032 task = _nfs41_proc_sequence(clp, cred);
6033 if (IS_ERR(task))
6034 ret = PTR_ERR(task);
6035 else
6036 rpc_put_task_async(task);
6037 dprintk("<-- %s status=%d\n", __func__, ret);
6038 return ret;
6039}
6040
6041static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6042{
6043 struct rpc_task *task;
6044 int ret;
6045
6046 task = _nfs41_proc_sequence(clp, cred);
6047 if (IS_ERR(task)) {
6048 ret = PTR_ERR(task);
6049 goto out;
6050 }
6051 ret = rpc_wait_for_completion_task(task);
6052 if (!ret) {
6053 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6054
6055 if (task->tk_status == 0)
6056 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6057 ret = task->tk_status;
6058 }
6059 rpc_put_task(task);
6060out:
6061 dprintk("<-- %s status=%d\n", __func__, ret);
6062 return ret;
6063}
6064
6065struct nfs4_reclaim_complete_data {
6066 struct nfs_client *clp;
6067 struct nfs41_reclaim_complete_args arg;
6068 struct nfs41_reclaim_complete_res res;
6069};
6070
6071static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6072{
6073 struct nfs4_reclaim_complete_data *calldata = data;
6074
6075 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6076 if (nfs41_setup_sequence(calldata->clp->cl_session,
6077 &calldata->arg.seq_args,
6078 &calldata->res.seq_res, task))
6079 return;
6080
6081 rpc_call_start(task);
6082}
6083
6084static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6085{
6086 switch(task->tk_status) {
6087 case 0:
6088 case -NFS4ERR_COMPLETE_ALREADY:
6089 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6090 break;
6091 case -NFS4ERR_DELAY:
6092 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6093 /* fall through */
6094 case -NFS4ERR_RETRY_UNCACHED_REP:
6095 return -EAGAIN;
6096 default:
6097 nfs4_schedule_lease_recovery(clp);
6098 }
6099 return 0;
6100}
6101
6102static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6103{
6104 struct nfs4_reclaim_complete_data *calldata = data;
6105 struct nfs_client *clp = calldata->clp;
6106 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6107
6108 dprintk("--> %s\n", __func__);
6109 if (!nfs41_sequence_done(task, res))
6110 return;
6111
6112 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6113 rpc_restart_call_prepare(task);
6114 return;
6115 }
6116 dprintk("<-- %s\n", __func__);
6117}
6118
6119static void nfs4_free_reclaim_complete_data(void *data)
6120{
6121 struct nfs4_reclaim_complete_data *calldata = data;
6122
6123 kfree(calldata);
6124}
6125
6126static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6127 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6128 .rpc_call_done = nfs4_reclaim_complete_done,
6129 .rpc_release = nfs4_free_reclaim_complete_data,
6130};
6131
6132/*
6133 * Issue a global reclaim complete.
6134 */
6135static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6136{
6137 struct nfs4_reclaim_complete_data *calldata;
6138 struct rpc_task *task;
6139 struct rpc_message msg = {
6140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6141 };
6142 struct rpc_task_setup task_setup_data = {
6143 .rpc_client = clp->cl_rpcclient,
6144 .rpc_message = &msg,
6145 .callback_ops = &nfs4_reclaim_complete_call_ops,
6146 .flags = RPC_TASK_ASYNC,
6147 };
6148 int status = -ENOMEM;
6149
6150 dprintk("--> %s\n", __func__);
6151 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6152 if (calldata == NULL)
6153 goto out;
6154 calldata->clp = clp;
6155 calldata->arg.one_fs = 0;
6156
6157 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6158 msg.rpc_argp = &calldata->arg;
6159 msg.rpc_resp = &calldata->res;
6160 task_setup_data.callback_data = calldata;
6161 task = rpc_run_task(&task_setup_data);
6162 if (IS_ERR(task)) {
6163 status = PTR_ERR(task);
6164 goto out;
6165 }
6166 status = nfs4_wait_for_completion_rpc_task(task);
6167 if (status == 0)
6168 status = task->tk_status;
6169 rpc_put_task(task);
6170 return 0;
6171out:
6172 dprintk("<-- %s status=%d\n", __func__, status);
6173 return status;
6174}
6175
6176static void
6177nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6178{
6179 struct nfs4_layoutget *lgp = calldata;
6180 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6181
6182 dprintk("--> %s\n", __func__);
6183 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6184 * right now covering the LAYOUTGET we are about to send.
6185 * However, that is not so catastrophic, and there seems
6186 * to be no way to prevent it completely.
6187 */
6188 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6189 &lgp->res.seq_res, task))
6190 return;
6191 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6192 NFS_I(lgp->args.inode)->layout,
6193 lgp->args.ctx->state)) {
6194 rpc_exit(task, NFS4_OK);
6195 return;
6196 }
6197 rpc_call_start(task);
6198}
6199
6200static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6201{
6202 struct nfs4_layoutget *lgp = calldata;
6203 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6204
6205 dprintk("--> %s\n", __func__);
6206
6207 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6208 return;
6209
6210 switch (task->tk_status) {
6211 case 0:
6212 break;
6213 case -NFS4ERR_LAYOUTTRYLATER:
6214 case -NFS4ERR_RECALLCONFLICT:
6215 task->tk_status = -NFS4ERR_DELAY;
6216 /* Fall through */
6217 default:
6218 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6219 rpc_restart_call_prepare(task);
6220 return;
6221 }
6222 }
6223 dprintk("<-- %s\n", __func__);
6224}
6225
6226static size_t max_response_pages(struct nfs_server *server)
6227{
6228 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6229 return nfs_page_array_len(0, max_resp_sz);
6230}
6231
6232static void nfs4_free_pages(struct page **pages, size_t size)
6233{
6234 int i;
6235
6236 if (!pages)
6237 return;
6238
6239 for (i = 0; i < size; i++) {
6240 if (!pages[i])
6241 break;
6242 __free_page(pages[i]);
6243 }
6244 kfree(pages);
6245}
6246
6247static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6248{
6249 struct page **pages;
6250 int i;
6251
6252 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6253 if (!pages) {
6254 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6255 return NULL;
6256 }
6257
6258 for (i = 0; i < size; i++) {
6259 pages[i] = alloc_page(gfp_flags);
6260 if (!pages[i]) {
6261 dprintk("%s: failed to allocate page\n", __func__);
6262 nfs4_free_pages(pages, size);
6263 return NULL;
6264 }
6265 }
6266
6267 return pages;
6268}
6269
6270static void nfs4_layoutget_release(void *calldata)
6271{
6272 struct nfs4_layoutget *lgp = calldata;
6273 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6274 size_t max_pages = max_response_pages(server);
6275
6276 dprintk("--> %s\n", __func__);
6277 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6278 put_nfs_open_context(lgp->args.ctx);
6279 kfree(calldata);
6280 dprintk("<-- %s\n", __func__);
6281}
6282
6283static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6284 .rpc_call_prepare = nfs4_layoutget_prepare,
6285 .rpc_call_done = nfs4_layoutget_done,
6286 .rpc_release = nfs4_layoutget_release,
6287};
6288
6289struct pnfs_layout_segment *
6290nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6291{
6292 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6293 size_t max_pages = max_response_pages(server);
6294 struct rpc_task *task;
6295 struct rpc_message msg = {
6296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6297 .rpc_argp = &lgp->args,
6298 .rpc_resp = &lgp->res,
6299 };
6300 struct rpc_task_setup task_setup_data = {
6301 .rpc_client = server->client,
6302 .rpc_message = &msg,
6303 .callback_ops = &nfs4_layoutget_call_ops,
6304 .callback_data = lgp,
6305 .flags = RPC_TASK_ASYNC,
6306 };
6307 struct pnfs_layout_segment *lseg = NULL;
6308 int status = 0;
6309
6310 dprintk("--> %s\n", __func__);
6311
6312 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6313 if (!lgp->args.layout.pages) {
6314 nfs4_layoutget_release(lgp);
6315 return ERR_PTR(-ENOMEM);
6316 }
6317 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6318
6319 lgp->res.layoutp = &lgp->args.layout;
6320 lgp->res.seq_res.sr_slot = NULL;
6321 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6322 task = rpc_run_task(&task_setup_data);
6323 if (IS_ERR(task))
6324 return ERR_CAST(task);
6325 status = nfs4_wait_for_completion_rpc_task(task);
6326 if (status == 0)
6327 status = task->tk_status;
6328 if (status == 0)
6329 lseg = pnfs_layout_process(lgp);
6330 rpc_put_task(task);
6331 dprintk("<-- %s status=%d\n", __func__, status);
6332 if (status)
6333 return ERR_PTR(status);
6334 return lseg;
6335}
6336
6337static void
6338nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6339{
6340 struct nfs4_layoutreturn *lrp = calldata;
6341
6342 dprintk("--> %s\n", __func__);
6343 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6344 &lrp->res.seq_res, task))
6345 return;
6346 rpc_call_start(task);
6347}
6348
6349static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6350{
6351 struct nfs4_layoutreturn *lrp = calldata;
6352 struct nfs_server *server;
6353
6354 dprintk("--> %s\n", __func__);
6355
6356 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6357 return;
6358
6359 server = NFS_SERVER(lrp->args.inode);
6360 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6361 rpc_restart_call_prepare(task);
6362 return;
6363 }
6364 dprintk("<-- %s\n", __func__);
6365}
6366
6367static void nfs4_layoutreturn_release(void *calldata)
6368{
6369 struct nfs4_layoutreturn *lrp = calldata;
6370 struct pnfs_layout_hdr *lo = lrp->args.layout;
6371
6372 dprintk("--> %s\n", __func__);
6373 spin_lock(&lo->plh_inode->i_lock);
6374 if (lrp->res.lrs_present)
6375 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6376 lo->plh_block_lgets--;
6377 spin_unlock(&lo->plh_inode->i_lock);
6378 pnfs_put_layout_hdr(lrp->args.layout);
6379 kfree(calldata);
6380 dprintk("<-- %s\n", __func__);
6381}
6382
6383static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6384 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6385 .rpc_call_done = nfs4_layoutreturn_done,
6386 .rpc_release = nfs4_layoutreturn_release,
6387};
6388
6389int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6390{
6391 struct rpc_task *task;
6392 struct rpc_message msg = {
6393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6394 .rpc_argp = &lrp->args,
6395 .rpc_resp = &lrp->res,
6396 };
6397 struct rpc_task_setup task_setup_data = {
6398 .rpc_client = lrp->clp->cl_rpcclient,
6399 .rpc_message = &msg,
6400 .callback_ops = &nfs4_layoutreturn_call_ops,
6401 .callback_data = lrp,
6402 };
6403 int status;
6404
6405 dprintk("--> %s\n", __func__);
6406 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6407 task = rpc_run_task(&task_setup_data);
6408 if (IS_ERR(task))
6409 return PTR_ERR(task);
6410 status = task->tk_status;
6411 dprintk("<-- %s status=%d\n", __func__, status);
6412 rpc_put_task(task);
6413 return status;
6414}
6415
6416/*
6417 * Retrieve the list of Data Server devices from the MDS.
6418 */
6419static int _nfs4_getdevicelist(struct nfs_server *server,
6420 const struct nfs_fh *fh,
6421 struct pnfs_devicelist *devlist)
6422{
6423 struct nfs4_getdevicelist_args args = {
6424 .fh = fh,
6425 .layoutclass = server->pnfs_curr_ld->id,
6426 };
6427 struct nfs4_getdevicelist_res res = {
6428 .devlist = devlist,
6429 };
6430 struct rpc_message msg = {
6431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6432 .rpc_argp = &args,
6433 .rpc_resp = &res,
6434 };
6435 int status;
6436
6437 dprintk("--> %s\n", __func__);
6438 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6439 &res.seq_res, 0);
6440 dprintk("<-- %s status=%d\n", __func__, status);
6441 return status;
6442}
6443
6444int nfs4_proc_getdevicelist(struct nfs_server *server,
6445 const struct nfs_fh *fh,
6446 struct pnfs_devicelist *devlist)
6447{
6448 struct nfs4_exception exception = { };
6449 int err;
6450
6451 do {
6452 err = nfs4_handle_exception(server,
6453 _nfs4_getdevicelist(server, fh, devlist),
6454 &exception);
6455 } while (exception.retry);
6456
6457 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6458 err, devlist->num_devs);
6459
6460 return err;
6461}
6462EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6463
6464static int
6465_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6466{
6467 struct nfs4_getdeviceinfo_args args = {
6468 .pdev = pdev,
6469 };
6470 struct nfs4_getdeviceinfo_res res = {
6471 .pdev = pdev,
6472 };
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6475 .rpc_argp = &args,
6476 .rpc_resp = &res,
6477 };
6478 int status;
6479
6480 dprintk("--> %s\n", __func__);
6481 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6482 dprintk("<-- %s status=%d\n", __func__, status);
6483
6484 return status;
6485}
6486
6487int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6488{
6489 struct nfs4_exception exception = { };
6490 int err;
6491
6492 do {
6493 err = nfs4_handle_exception(server,
6494 _nfs4_proc_getdeviceinfo(server, pdev),
6495 &exception);
6496 } while (exception.retry);
6497 return err;
6498}
6499EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6500
6501static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6502{
6503 struct nfs4_layoutcommit_data *data = calldata;
6504 struct nfs_server *server = NFS_SERVER(data->args.inode);
6505
6506 if (nfs4_setup_sequence(server, &data->args.seq_args,
6507 &data->res.seq_res, task))
6508 return;
6509 rpc_call_start(task);
6510}
6511
6512static void
6513nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6514{
6515 struct nfs4_layoutcommit_data *data = calldata;
6516 struct nfs_server *server = NFS_SERVER(data->args.inode);
6517
6518 if (!nfs4_sequence_done(task, &data->res.seq_res))
6519 return;
6520
6521 switch (task->tk_status) { /* Just ignore these failures */
6522 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6523 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6524 case -NFS4ERR_BADLAYOUT: /* no layout */
6525 case -NFS4ERR_GRACE: /* loca_recalim always false */
6526 task->tk_status = 0;
6527 break;
6528 case 0:
6529 nfs_post_op_update_inode_force_wcc(data->args.inode,
6530 data->res.fattr);
6531 break;
6532 default:
6533 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6534 rpc_restart_call_prepare(task);
6535 return;
6536 }
6537 }
6538}
6539
6540static void nfs4_layoutcommit_release(void *calldata)
6541{
6542 struct nfs4_layoutcommit_data *data = calldata;
6543 struct pnfs_layout_segment *lseg, *tmp;
6544 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6545
6546 pnfs_cleanup_layoutcommit(data);
6547 /* Matched by references in pnfs_set_layoutcommit */
6548 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6549 list_del_init(&lseg->pls_lc_list);
6550 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6551 &lseg->pls_flags))
6552 pnfs_put_lseg(lseg);
6553 }
6554
6555 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6556 smp_mb__after_clear_bit();
6557 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6558
6559 put_rpccred(data->cred);
6560 kfree(data);
6561}
6562
6563static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6564 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6565 .rpc_call_done = nfs4_layoutcommit_done,
6566 .rpc_release = nfs4_layoutcommit_release,
6567};
6568
6569int
6570nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6571{
6572 struct rpc_message msg = {
6573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6574 .rpc_argp = &data->args,
6575 .rpc_resp = &data->res,
6576 .rpc_cred = data->cred,
6577 };
6578 struct rpc_task_setup task_setup_data = {
6579 .task = &data->task,
6580 .rpc_client = NFS_CLIENT(data->args.inode),
6581 .rpc_message = &msg,
6582 .callback_ops = &nfs4_layoutcommit_ops,
6583 .callback_data = data,
6584 .flags = RPC_TASK_ASYNC,
6585 };
6586 struct rpc_task *task;
6587 int status = 0;
6588
6589 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6590 "lbw: %llu inode %lu\n",
6591 data->task.tk_pid, sync,
6592 data->args.lastbytewritten,
6593 data->args.inode->i_ino);
6594
6595 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6596 task = rpc_run_task(&task_setup_data);
6597 if (IS_ERR(task))
6598 return PTR_ERR(task);
6599 if (sync == false)
6600 goto out;
6601 status = nfs4_wait_for_completion_rpc_task(task);
6602 if (status != 0)
6603 goto out;
6604 status = task->tk_status;
6605out:
6606 dprintk("%s: status %d\n", __func__, status);
6607 rpc_put_task(task);
6608 return status;
6609}
6610
6611static int
6612_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6613 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6614{
6615 struct nfs41_secinfo_no_name_args args = {
6616 .style = SECINFO_STYLE_CURRENT_FH,
6617 };
6618 struct nfs4_secinfo_res res = {
6619 .flavors = flavors,
6620 };
6621 struct rpc_message msg = {
6622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6623 .rpc_argp = &args,
6624 .rpc_resp = &res,
6625 };
6626 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6627}
6628
6629static int
6630nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6631 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6632{
6633 struct nfs4_exception exception = { };
6634 int err;
6635 do {
6636 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6637 switch (err) {
6638 case 0:
6639 case -NFS4ERR_WRONGSEC:
6640 case -NFS4ERR_NOTSUPP:
6641 goto out;
6642 default:
6643 err = nfs4_handle_exception(server, err, &exception);
6644 }
6645 } while (exception.retry);
6646out:
6647 return err;
6648}
6649
6650static int
6651nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6652 struct nfs_fsinfo *info)
6653{
6654 int err;
6655 struct page *page;
6656 rpc_authflavor_t flavor;
6657 struct nfs4_secinfo_flavors *flavors;
6658
6659 page = alloc_page(GFP_KERNEL);
6660 if (!page) {
6661 err = -ENOMEM;
6662 goto out;
6663 }
6664
6665 flavors = page_address(page);
6666 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6667
6668 /*
6669 * Fall back on "guess and check" method if
6670 * the server doesn't support SECINFO_NO_NAME
6671 */
6672 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6673 err = nfs4_find_root_sec(server, fhandle, info);
6674 goto out_freepage;
6675 }
6676 if (err)
6677 goto out_freepage;
6678
6679 flavor = nfs_find_best_sec(flavors);
6680 if (err == 0)
6681 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6682
6683out_freepage:
6684 put_page(page);
6685 if (err == -EACCES)
6686 return -EPERM;
6687out:
6688 return err;
6689}
6690
6691static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6692{
6693 int status;
6694 struct nfs41_test_stateid_args args = {
6695 .stateid = stateid,
6696 };
6697 struct nfs41_test_stateid_res res;
6698 struct rpc_message msg = {
6699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6700 .rpc_argp = &args,
6701 .rpc_resp = &res,
6702 };
6703
6704 dprintk("NFS call test_stateid %p\n", stateid);
6705 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6706 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6707 if (status != NFS_OK) {
6708 dprintk("NFS reply test_stateid: failed, %d\n", status);
6709 return status;
6710 }
6711 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6712 return -res.status;
6713}
6714
6715/**
6716 * nfs41_test_stateid - perform a TEST_STATEID operation
6717 *
6718 * @server: server / transport on which to perform the operation
6719 * @stateid: state ID to test
6720 *
6721 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6722 * Otherwise a negative NFS4ERR value is returned if the operation
6723 * failed or the state ID is not currently valid.
6724 */
6725static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6726{
6727 struct nfs4_exception exception = { };
6728 int err;
6729 do {
6730 err = _nfs41_test_stateid(server, stateid);
6731 if (err != -NFS4ERR_DELAY)
6732 break;
6733 nfs4_handle_exception(server, err, &exception);
6734 } while (exception.retry);
6735 return err;
6736}
6737
6738static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6739{
6740 struct nfs41_free_stateid_args args = {
6741 .stateid = stateid,
6742 };
6743 struct nfs41_free_stateid_res res;
6744 struct rpc_message msg = {
6745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6746 .rpc_argp = &args,
6747 .rpc_resp = &res,
6748 };
6749 int status;
6750
6751 dprintk("NFS call free_stateid %p\n", stateid);
6752 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6753 status = nfs4_call_sync_sequence(server->client, server, &msg,
6754 &args.seq_args, &res.seq_res, 1);
6755 dprintk("NFS reply free_stateid: %d\n", status);
6756 return status;
6757}
6758
6759/**
6760 * nfs41_free_stateid - perform a FREE_STATEID operation
6761 *
6762 * @server: server / transport on which to perform the operation
6763 * @stateid: state ID to release
6764 *
6765 * Returns NFS_OK if the server freed "stateid". Otherwise a
6766 * negative NFS4ERR value is returned.
6767 */
6768static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6769{
6770 struct nfs4_exception exception = { };
6771 int err;
6772 do {
6773 err = _nfs4_free_stateid(server, stateid);
6774 if (err != -NFS4ERR_DELAY)
6775 break;
6776 nfs4_handle_exception(server, err, &exception);
6777 } while (exception.retry);
6778 return err;
6779}
6780
6781static bool nfs41_match_stateid(const nfs4_stateid *s1,
6782 const nfs4_stateid *s2)
6783{
6784 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6785 return false;
6786
6787 if (s1->seqid == s2->seqid)
6788 return true;
6789 if (s1->seqid == 0 || s2->seqid == 0)
6790 return true;
6791
6792 return false;
6793}
6794
6795#endif /* CONFIG_NFS_V4_1 */
6796
6797static bool nfs4_match_stateid(const nfs4_stateid *s1,
6798 const nfs4_stateid *s2)
6799{
6800 return nfs4_stateid_match(s1, s2);
6801}
6802
6803
6804static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6805 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6806 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6807 .recover_open = nfs4_open_reclaim,
6808 .recover_lock = nfs4_lock_reclaim,
6809 .establish_clid = nfs4_init_clientid,
6810 .get_clid_cred = nfs4_get_setclientid_cred,
6811};
6812
6813#if defined(CONFIG_NFS_V4_1)
6814static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6815 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6816 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6817 .recover_open = nfs4_open_reclaim,
6818 .recover_lock = nfs4_lock_reclaim,
6819 .establish_clid = nfs41_init_clientid,
6820 .get_clid_cred = nfs4_get_exchange_id_cred,
6821 .reclaim_complete = nfs41_proc_reclaim_complete,
6822};
6823#endif /* CONFIG_NFS_V4_1 */
6824
6825static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6826 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6827 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6828 .recover_open = nfs4_open_expired,
6829 .recover_lock = nfs4_lock_expired,
6830 .establish_clid = nfs4_init_clientid,
6831 .get_clid_cred = nfs4_get_setclientid_cred,
6832};
6833
6834#if defined(CONFIG_NFS_V4_1)
6835static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6836 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6837 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6838 .recover_open = nfs41_open_expired,
6839 .recover_lock = nfs41_lock_expired,
6840 .establish_clid = nfs41_init_clientid,
6841 .get_clid_cred = nfs4_get_exchange_id_cred,
6842};
6843#endif /* CONFIG_NFS_V4_1 */
6844
6845static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6846 .sched_state_renewal = nfs4_proc_async_renew,
6847 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6848 .renew_lease = nfs4_proc_renew,
6849};
6850
6851#if defined(CONFIG_NFS_V4_1)
6852static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6853 .sched_state_renewal = nfs41_proc_async_sequence,
6854 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6855 .renew_lease = nfs4_proc_sequence,
6856};
6857#endif
6858
6859static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6860 .minor_version = 0,
6861 .call_sync = _nfs4_call_sync,
6862 .match_stateid = nfs4_match_stateid,
6863 .find_root_sec = nfs4_find_root_sec,
6864 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6865 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6866 .state_renewal_ops = &nfs40_state_renewal_ops,
6867};
6868
6869#if defined(CONFIG_NFS_V4_1)
6870static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6871 .minor_version = 1,
6872 .call_sync = _nfs4_call_sync_session,
6873 .match_stateid = nfs41_match_stateid,
6874 .find_root_sec = nfs41_find_root_sec,
6875 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6876 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6877 .state_renewal_ops = &nfs41_state_renewal_ops,
6878};
6879#endif
6880
6881const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6882 [0] = &nfs_v4_0_minor_ops,
6883#if defined(CONFIG_NFS_V4_1)
6884 [1] = &nfs_v4_1_minor_ops,
6885#endif
6886};
6887
6888const struct inode_operations nfs4_dir_inode_operations = {
6889 .create = nfs_create,
6890 .lookup = nfs_lookup,
6891 .atomic_open = nfs_atomic_open,
6892 .link = nfs_link,
6893 .unlink = nfs_unlink,
6894 .symlink = nfs_symlink,
6895 .mkdir = nfs_mkdir,
6896 .rmdir = nfs_rmdir,
6897 .mknod = nfs_mknod,
6898 .rename = nfs_rename,
6899 .permission = nfs_permission,
6900 .getattr = nfs_getattr,
6901 .setattr = nfs_setattr,
6902 .getxattr = generic_getxattr,
6903 .setxattr = generic_setxattr,
6904 .listxattr = generic_listxattr,
6905 .removexattr = generic_removexattr,
6906};
6907
6908static const struct inode_operations nfs4_file_inode_operations = {
6909 .permission = nfs_permission,
6910 .getattr = nfs_getattr,
6911 .setattr = nfs_setattr,
6912 .getxattr = generic_getxattr,
6913 .setxattr = generic_setxattr,
6914 .listxattr = generic_listxattr,
6915 .removexattr = generic_removexattr,
6916};
6917
6918const struct nfs_rpc_ops nfs_v4_clientops = {
6919 .version = 4, /* protocol version */
6920 .dentry_ops = &nfs4_dentry_operations,
6921 .dir_inode_ops = &nfs4_dir_inode_operations,
6922 .file_inode_ops = &nfs4_file_inode_operations,
6923 .file_ops = &nfs4_file_operations,
6924 .getroot = nfs4_proc_get_root,
6925 .submount = nfs4_submount,
6926 .try_mount = nfs4_try_mount,
6927 .getattr = nfs4_proc_getattr,
6928 .setattr = nfs4_proc_setattr,
6929 .lookup = nfs4_proc_lookup,
6930 .access = nfs4_proc_access,
6931 .readlink = nfs4_proc_readlink,
6932 .create = nfs4_proc_create,
6933 .remove = nfs4_proc_remove,
6934 .unlink_setup = nfs4_proc_unlink_setup,
6935 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6936 .unlink_done = nfs4_proc_unlink_done,
6937 .rename = nfs4_proc_rename,
6938 .rename_setup = nfs4_proc_rename_setup,
6939 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6940 .rename_done = nfs4_proc_rename_done,
6941 .link = nfs4_proc_link,
6942 .symlink = nfs4_proc_symlink,
6943 .mkdir = nfs4_proc_mkdir,
6944 .rmdir = nfs4_proc_remove,
6945 .readdir = nfs4_proc_readdir,
6946 .mknod = nfs4_proc_mknod,
6947 .statfs = nfs4_proc_statfs,
6948 .fsinfo = nfs4_proc_fsinfo,
6949 .pathconf = nfs4_proc_pathconf,
6950 .set_capabilities = nfs4_server_capabilities,
6951 .decode_dirent = nfs4_decode_dirent,
6952 .read_setup = nfs4_proc_read_setup,
6953 .read_pageio_init = pnfs_pageio_init_read,
6954 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6955 .read_done = nfs4_read_done,
6956 .write_setup = nfs4_proc_write_setup,
6957 .write_pageio_init = pnfs_pageio_init_write,
6958 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6959 .write_done = nfs4_write_done,
6960 .commit_setup = nfs4_proc_commit_setup,
6961 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6962 .commit_done = nfs4_commit_done,
6963 .lock = nfs4_proc_lock,
6964 .clear_acl_cache = nfs4_zap_acl_attr,
6965 .close_context = nfs4_close_context,
6966 .open_context = nfs4_atomic_open,
6967 .have_delegation = nfs4_have_delegation,
6968 .return_delegation = nfs4_inode_return_delegation,
6969 .alloc_client = nfs4_alloc_client,
6970 .init_client = nfs4_init_client,
6971 .free_client = nfs4_free_client,
6972 .create_server = nfs4_create_server,
6973 .clone_server = nfs_clone_server,
6974};
6975
6976static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6977 .prefix = XATTR_NAME_NFSV4_ACL,
6978 .list = nfs4_xattr_list_nfs4_acl,
6979 .get = nfs4_xattr_get_nfs4_acl,
6980 .set = nfs4_xattr_set_nfs4_acl,
6981};
6982
6983const struct xattr_handler *nfs4_xattr_handlers[] = {
6984 &nfs4_xattr_nfs4_acl_handler,
6985 NULL
6986};
6987
6988/*
6989 * Local variables:
6990 * c-basic-offset: 8
6991 * End:
6992 */
Linux 6.x block layer and io_uring tree(s)