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NFS: Remove nfs4_setup_sequence from generic write code
[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/sunrpc/gss_api.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
51#include <linux/nfs_mount.h>
52#include <linux/namei.h>
53#include <linux/mount.h>
54#include <linux/module.h>
55#include <linux/nfs_idmap.h>
56#include <linux/sunrpc/bc_xprt.h>
57#include <linux/xattr.h>
58#include <linux/utsname.h>
59#include <linux/freezer.h>
60
61#include "nfs4_fs.h"
62#include "delegation.h"
63#include "internal.h"
64#include "iostat.h"
65#include "callback.h"
66#include "pnfs.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
75static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
76
77struct nfs4_opendata;
78static int _nfs4_proc_open(struct nfs4_opendata *data);
79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state);
87#ifdef CONFIG_NFS_V4_1
88static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
90#endif
91/* Prevent leaks of NFSv4 errors into userland */
92static int nfs4_map_errors(int err)
93{
94 if (err >= -1000)
95 return err;
96 switch (err) {
97 case -NFS4ERR_RESOURCE:
98 return -EREMOTEIO;
99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
104 default:
105 dprintk("%s could not handle NFSv4 error %d\n",
106 __func__, -err);
107 break;
108 }
109 return -EIO;
110}
111
112/*
113 * This is our standard bitmap for GETATTR requests.
114 */
115const u32 nfs4_fattr_bitmap[2] = {
116 FATTR4_WORD0_TYPE
117 | FATTR4_WORD0_CHANGE
118 | FATTR4_WORD0_SIZE
119 | FATTR4_WORD0_FSID
120 | FATTR4_WORD0_FILEID,
121 FATTR4_WORD1_MODE
122 | FATTR4_WORD1_NUMLINKS
123 | FATTR4_WORD1_OWNER
124 | FATTR4_WORD1_OWNER_GROUP
125 | FATTR4_WORD1_RAWDEV
126 | FATTR4_WORD1_SPACE_USED
127 | FATTR4_WORD1_TIME_ACCESS
128 | FATTR4_WORD1_TIME_METADATA
129 | FATTR4_WORD1_TIME_MODIFY
130};
131
132const u32 nfs4_statfs_bitmap[2] = {
133 FATTR4_WORD0_FILES_AVAIL
134 | FATTR4_WORD0_FILES_FREE
135 | FATTR4_WORD0_FILES_TOTAL,
136 FATTR4_WORD1_SPACE_AVAIL
137 | FATTR4_WORD1_SPACE_FREE
138 | FATTR4_WORD1_SPACE_TOTAL
139};
140
141const u32 nfs4_pathconf_bitmap[2] = {
142 FATTR4_WORD0_MAXLINK
143 | FATTR4_WORD0_MAXNAME,
144 0
145};
146
147const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
148 | FATTR4_WORD0_MAXREAD
149 | FATTR4_WORD0_MAXWRITE
150 | FATTR4_WORD0_LEASE_TIME,
151 FATTR4_WORD1_TIME_DELTA
152 | FATTR4_WORD1_FS_LAYOUT_TYPES,
153 FATTR4_WORD2_LAYOUT_BLKSIZE
154};
155
156const u32 nfs4_fs_locations_bitmap[2] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_SIZE
160 | FATTR4_WORD0_FSID
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
163 FATTR4_WORD1_MODE
164 | FATTR4_WORD1_NUMLINKS
165 | FATTR4_WORD1_OWNER
166 | FATTR4_WORD1_OWNER_GROUP
167 | FATTR4_WORD1_RAWDEV
168 | FATTR4_WORD1_SPACE_USED
169 | FATTR4_WORD1_TIME_ACCESS
170 | FATTR4_WORD1_TIME_METADATA
171 | FATTR4_WORD1_TIME_MODIFY
172 | FATTR4_WORD1_MOUNTED_ON_FILEID
173};
174
175static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
176 struct nfs4_readdir_arg *readdir)
177{
178 __be32 *start, *p;
179
180 BUG_ON(readdir->count < 80);
181 if (cookie > 2) {
182 readdir->cookie = cookie;
183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
184 return;
185 }
186
187 readdir->cookie = 0;
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
189 if (cookie == 2)
190 return;
191
192 /*
193 * NFSv4 servers do not return entries for '.' and '..'
194 * Therefore, we fake these entries here. We let '.'
195 * have cookie 0 and '..' have cookie 1. Note that
196 * when talking to the server, we always send cookie 0
197 * instead of 1 or 2.
198 */
199 start = p = kmap_atomic(*readdir->pages, KM_USER0);
200
201 if (cookie == 0) {
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_one; /* cookie, second word */
205 *p++ = xdr_one; /* entry len */
206 memcpy(p, ".\0\0\0", 4); /* entry */
207 p++;
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
212 }
213
214 *p++ = xdr_one; /* next */
215 *p++ = xdr_zero; /* cookie, first word */
216 *p++ = xdr_two; /* cookie, second word */
217 *p++ = xdr_two; /* entry len */
218 memcpy(p, "..\0\0", 4); /* entry */
219 p++;
220 *p++ = xdr_one; /* bitmap length */
221 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
222 *p++ = htonl(8); /* attribute buffer length */
223 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
224
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
227 kunmap_atomic(start, KM_USER0);
228}
229
230static int nfs4_wait_clnt_recover(struct nfs_client *clp)
231{
232 int res;
233
234 might_sleep();
235
236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
237 nfs_wait_bit_killable, TASK_KILLABLE);
238 return res;
239}
240
241static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
242{
243 int res = 0;
244
245 might_sleep();
246
247 if (*timeout <= 0)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
251 freezable_schedule_timeout_killable(*timeout);
252 if (fatal_signal_pending(current))
253 res = -ERESTARTSYS;
254 *timeout <<= 1;
255 return res;
256}
257
258/* This is the error handling routine for processes that are allowed
259 * to sleep.
260 */
261static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
262{
263 struct nfs_client *clp = server->nfs_client;
264 struct nfs4_state *state = exception->state;
265 struct inode *inode = exception->inode;
266 int ret = errorcode;
267
268 exception->retry = 0;
269 switch(errorcode) {
270 case 0:
271 return 0;
272 case -NFS4ERR_OPENMODE:
273 if (nfs_have_delegation(inode, FMODE_READ)) {
274 nfs_inode_return_delegation(inode);
275 exception->retry = 1;
276 return 0;
277 }
278 if (state == NULL)
279 break;
280 nfs4_schedule_stateid_recovery(server, state);
281 goto wait_on_recovery;
282 case -NFS4ERR_DELEG_REVOKED:
283 case -NFS4ERR_ADMIN_REVOKED:
284 case -NFS4ERR_BAD_STATEID:
285 if (state != NULL)
286 nfs_remove_bad_delegation(state->inode);
287 if (state == NULL)
288 break;
289 nfs4_schedule_stateid_recovery(server, state);
290 goto wait_on_recovery;
291 case -NFS4ERR_EXPIRED:
292 if (state != NULL)
293 nfs4_schedule_stateid_recovery(server, state);
294 case -NFS4ERR_STALE_STATEID:
295 case -NFS4ERR_STALE_CLIENTID:
296 nfs4_schedule_lease_recovery(clp);
297 goto wait_on_recovery;
298#if defined(CONFIG_NFS_V4_1)
299 case -NFS4ERR_BADSESSION:
300 case -NFS4ERR_BADSLOT:
301 case -NFS4ERR_BAD_HIGH_SLOT:
302 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
303 case -NFS4ERR_DEADSESSION:
304 case -NFS4ERR_SEQ_FALSE_RETRY:
305 case -NFS4ERR_SEQ_MISORDERED:
306 dprintk("%s ERROR: %d Reset session\n", __func__,
307 errorcode);
308 nfs4_schedule_session_recovery(clp->cl_session);
309 exception->retry = 1;
310 break;
311#endif /* defined(CONFIG_NFS_V4_1) */
312 case -NFS4ERR_FILE_OPEN:
313 if (exception->timeout > HZ) {
314 /* We have retried a decent amount, time to
315 * fail
316 */
317 ret = -EBUSY;
318 break;
319 }
320 case -NFS4ERR_GRACE:
321 case -NFS4ERR_DELAY:
322 case -EKEYEXPIRED:
323 ret = nfs4_delay(server->client, &exception->timeout);
324 if (ret != 0)
325 break;
326 case -NFS4ERR_RETRY_UNCACHED_REP:
327 case -NFS4ERR_OLD_STATEID:
328 exception->retry = 1;
329 break;
330 case -NFS4ERR_BADOWNER:
331 /* The following works around a Linux server bug! */
332 case -NFS4ERR_BADNAME:
333 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
334 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
335 exception->retry = 1;
336 printk(KERN_WARNING "NFS: v4 server %s "
337 "does not accept raw "
338 "uid/gids. "
339 "Reenabling the idmapper.\n",
340 server->nfs_client->cl_hostname);
341 }
342 }
343 /* We failed to handle the error */
344 return nfs4_map_errors(ret);
345wait_on_recovery:
346 ret = nfs4_wait_clnt_recover(clp);
347 if (ret == 0)
348 exception->retry = 1;
349 return ret;
350}
351
352
353static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
354{
355 spin_lock(&clp->cl_lock);
356 if (time_before(clp->cl_last_renewal,timestamp))
357 clp->cl_last_renewal = timestamp;
358 spin_unlock(&clp->cl_lock);
359}
360
361static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
362{
363 do_renew_lease(server->nfs_client, timestamp);
364}
365
366#if defined(CONFIG_NFS_V4_1)
367
368/*
369 * nfs4_free_slot - free a slot and efficiently update slot table.
370 *
371 * freeing a slot is trivially done by clearing its respective bit
372 * in the bitmap.
373 * If the freed slotid equals highest_used_slotid we want to update it
374 * so that the server would be able to size down the slot table if needed,
375 * otherwise we know that the highest_used_slotid is still in use.
376 * When updating highest_used_slotid there may be "holes" in the bitmap
377 * so we need to scan down from highest_used_slotid to 0 looking for the now
378 * highest slotid in use.
379 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
380 *
381 * Must be called while holding tbl->slot_tbl_lock
382 */
383static void
384nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
385{
386 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
387 /* clear used bit in bitmap */
388 __clear_bit(slotid, tbl->used_slots);
389
390 /* update highest_used_slotid when it is freed */
391 if (slotid == tbl->highest_used_slotid) {
392 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
393 if (slotid < tbl->max_slots)
394 tbl->highest_used_slotid = slotid;
395 else
396 tbl->highest_used_slotid = NFS4_NO_SLOT;
397 }
398 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
399 slotid, tbl->highest_used_slotid);
400}
401
402bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
403{
404 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
405 return true;
406}
407
408/*
409 * Signal state manager thread if session fore channel is drained
410 */
411static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
412{
413 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
414 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
415 nfs4_set_task_privileged, NULL);
416 return;
417 }
418
419 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
420 return;
421
422 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
423 complete(&ses->fc_slot_table.complete);
424}
425
426/*
427 * Signal state manager thread if session back channel is drained
428 */
429void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
430{
431 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
432 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
433 return;
434 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
435 complete(&ses->bc_slot_table.complete);
436}
437
438static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
439{
440 struct nfs4_slot_table *tbl;
441
442 tbl = &res->sr_session->fc_slot_table;
443 if (!res->sr_slot) {
444 /* just wake up the next guy waiting since
445 * we may have not consumed a slot after all */
446 dprintk("%s: No slot\n", __func__);
447 return;
448 }
449
450 spin_lock(&tbl->slot_tbl_lock);
451 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
452 nfs4_check_drain_fc_complete(res->sr_session);
453 spin_unlock(&tbl->slot_tbl_lock);
454 res->sr_slot = NULL;
455}
456
457static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
458{
459 unsigned long timestamp;
460 struct nfs_client *clp;
461
462 /*
463 * sr_status remains 1 if an RPC level error occurred. The server
464 * may or may not have processed the sequence operation..
465 * Proceed as if the server received and processed the sequence
466 * operation.
467 */
468 if (res->sr_status == 1)
469 res->sr_status = NFS_OK;
470
471 /* don't increment the sequence number if the task wasn't sent */
472 if (!RPC_WAS_SENT(task))
473 goto out;
474
475 /* Check the SEQUENCE operation status */
476 switch (res->sr_status) {
477 case 0:
478 /* Update the slot's sequence and clientid lease timer */
479 ++res->sr_slot->seq_nr;
480 timestamp = res->sr_renewal_time;
481 clp = res->sr_session->clp;
482 do_renew_lease(clp, timestamp);
483 /* Check sequence flags */
484 if (res->sr_status_flags != 0)
485 nfs4_schedule_lease_recovery(clp);
486 break;
487 case -NFS4ERR_DELAY:
488 /* The server detected a resend of the RPC call and
489 * returned NFS4ERR_DELAY as per Section 2.10.6.2
490 * of RFC5661.
491 */
492 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
493 __func__,
494 res->sr_slot - res->sr_session->fc_slot_table.slots,
495 res->sr_slot->seq_nr);
496 goto out_retry;
497 default:
498 /* Just update the slot sequence no. */
499 ++res->sr_slot->seq_nr;
500 }
501out:
502 /* The session may be reset by one of the error handlers. */
503 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
504 nfs41_sequence_free_slot(res);
505 return 1;
506out_retry:
507 if (!rpc_restart_call(task))
508 goto out;
509 rpc_delay(task, NFS4_POLL_RETRY_MAX);
510 return 0;
511}
512
513static int nfs4_sequence_done(struct rpc_task *task,
514 struct nfs4_sequence_res *res)
515{
516 if (res->sr_session == NULL)
517 return 1;
518 return nfs41_sequence_done(task, res);
519}
520
521/*
522 * nfs4_find_slot - efficiently look for a free slot
523 *
524 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
525 * If found, we mark the slot as used, update the highest_used_slotid,
526 * and respectively set up the sequence operation args.
527 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
528 *
529 * Note: must be called with under the slot_tbl_lock.
530 */
531static u32
532nfs4_find_slot(struct nfs4_slot_table *tbl)
533{
534 u32 slotid;
535 u32 ret_id = NFS4_NO_SLOT;
536
537 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
538 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
539 tbl->max_slots);
540 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
541 if (slotid >= tbl->max_slots)
542 goto out;
543 __set_bit(slotid, tbl->used_slots);
544 if (slotid > tbl->highest_used_slotid ||
545 tbl->highest_used_slotid == NFS4_NO_SLOT)
546 tbl->highest_used_slotid = slotid;
547 ret_id = slotid;
548out:
549 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
550 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
551 return ret_id;
552}
553
554static void nfs41_init_sequence(struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res, int cache_reply)
556{
557 args->sa_session = NULL;
558 args->sa_cache_this = 0;
559 if (cache_reply)
560 args->sa_cache_this = 1;
561 res->sr_session = NULL;
562 res->sr_slot = NULL;
563}
564
565int nfs41_setup_sequence(struct nfs4_session *session,
566 struct nfs4_sequence_args *args,
567 struct nfs4_sequence_res *res,
568 struct rpc_task *task)
569{
570 struct nfs4_slot *slot;
571 struct nfs4_slot_table *tbl;
572 u32 slotid;
573
574 dprintk("--> %s\n", __func__);
575 /* slot already allocated? */
576 if (res->sr_slot != NULL)
577 return 0;
578
579 tbl = &session->fc_slot_table;
580
581 spin_lock(&tbl->slot_tbl_lock);
582 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
583 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
584 /* The state manager will wait until the slot table is empty */
585 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
586 spin_unlock(&tbl->slot_tbl_lock);
587 dprintk("%s session is draining\n", __func__);
588 return -EAGAIN;
589 }
590
591 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
592 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
593 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
594 spin_unlock(&tbl->slot_tbl_lock);
595 dprintk("%s enforce FIFO order\n", __func__);
596 return -EAGAIN;
597 }
598
599 slotid = nfs4_find_slot(tbl);
600 if (slotid == NFS4_NO_SLOT) {
601 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
602 spin_unlock(&tbl->slot_tbl_lock);
603 dprintk("<-- %s: no free slots\n", __func__);
604 return -EAGAIN;
605 }
606 spin_unlock(&tbl->slot_tbl_lock);
607
608 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
609 slot = tbl->slots + slotid;
610 args->sa_session = session;
611 args->sa_slotid = slotid;
612
613 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
614
615 res->sr_session = session;
616 res->sr_slot = slot;
617 res->sr_renewal_time = jiffies;
618 res->sr_status_flags = 0;
619 /*
620 * sr_status is only set in decode_sequence, and so will remain
621 * set to 1 if an rpc level failure occurs.
622 */
623 res->sr_status = 1;
624 return 0;
625}
626EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
627
628int nfs4_setup_sequence(const struct nfs_server *server,
629 struct nfs4_sequence_args *args,
630 struct nfs4_sequence_res *res,
631 struct rpc_task *task)
632{
633 struct nfs4_session *session = nfs4_get_session(server);
634 int ret = 0;
635
636 if (session == NULL)
637 goto out;
638
639 dprintk("--> %s clp %p session %p sr_slot %td\n",
640 __func__, session->clp, session, res->sr_slot ?
641 res->sr_slot - session->fc_slot_table.slots : -1);
642
643 ret = nfs41_setup_sequence(session, args, res, task);
644out:
645 dprintk("<-- %s status=%d\n", __func__, ret);
646 return ret;
647}
648
649struct nfs41_call_sync_data {
650 const struct nfs_server *seq_server;
651 struct nfs4_sequence_args *seq_args;
652 struct nfs4_sequence_res *seq_res;
653};
654
655static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
659 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
660
661 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
662 data->seq_res, task))
663 return;
664 rpc_call_start(task);
665}
666
667static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
668{
669 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
670 nfs41_call_sync_prepare(task, calldata);
671}
672
673static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
674{
675 struct nfs41_call_sync_data *data = calldata;
676
677 nfs41_sequence_done(task, data->seq_res);
678}
679
680static const struct rpc_call_ops nfs41_call_sync_ops = {
681 .rpc_call_prepare = nfs41_call_sync_prepare,
682 .rpc_call_done = nfs41_call_sync_done,
683};
684
685static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
686 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
687 .rpc_call_done = nfs41_call_sync_done,
688};
689
690static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
691 struct nfs_server *server,
692 struct rpc_message *msg,
693 struct nfs4_sequence_args *args,
694 struct nfs4_sequence_res *res,
695 int privileged)
696{
697 int ret;
698 struct rpc_task *task;
699 struct nfs41_call_sync_data data = {
700 .seq_server = server,
701 .seq_args = args,
702 .seq_res = res,
703 };
704 struct rpc_task_setup task_setup = {
705 .rpc_client = clnt,
706 .rpc_message = msg,
707 .callback_ops = &nfs41_call_sync_ops,
708 .callback_data = &data
709 };
710
711 if (privileged)
712 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
713 task = rpc_run_task(&task_setup);
714 if (IS_ERR(task))
715 ret = PTR_ERR(task);
716 else {
717 ret = task->tk_status;
718 rpc_put_task(task);
719 }
720 return ret;
721}
722
723int _nfs4_call_sync_session(struct rpc_clnt *clnt,
724 struct nfs_server *server,
725 struct rpc_message *msg,
726 struct nfs4_sequence_args *args,
727 struct nfs4_sequence_res *res,
728 int cache_reply)
729{
730 nfs41_init_sequence(args, res, cache_reply);
731 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
732}
733
734#else
735static inline
736void nfs41_init_sequence(struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res, int cache_reply)
738{
739}
740
741static int nfs4_sequence_done(struct rpc_task *task,
742 struct nfs4_sequence_res *res)
743{
744 return 1;
745}
746#endif /* CONFIG_NFS_V4_1 */
747
748int _nfs4_call_sync(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 rpc_call_sync(clnt, msg, 0);
757}
758
759static inline
760int nfs4_call_sync(struct rpc_clnt *clnt,
761 struct nfs_server *server,
762 struct rpc_message *msg,
763 struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res,
765 int cache_reply)
766{
767 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
768 args, res, cache_reply);
769}
770
771static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
772{
773 struct nfs_inode *nfsi = NFS_I(dir);
774
775 spin_lock(&dir->i_lock);
776 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
777 if (!cinfo->atomic || cinfo->before != dir->i_version)
778 nfs_force_lookup_revalidate(dir);
779 dir->i_version = cinfo->after;
780 spin_unlock(&dir->i_lock);
781}
782
783struct nfs4_opendata {
784 struct kref kref;
785 struct nfs_openargs o_arg;
786 struct nfs_openres o_res;
787 struct nfs_open_confirmargs c_arg;
788 struct nfs_open_confirmres c_res;
789 struct nfs4_string owner_name;
790 struct nfs4_string group_name;
791 struct nfs_fattr f_attr;
792 struct nfs_fattr dir_attr;
793 struct dentry *dir;
794 struct dentry *dentry;
795 struct nfs4_state_owner *owner;
796 struct nfs4_state *state;
797 struct iattr attrs;
798 unsigned long timestamp;
799 unsigned int rpc_done : 1;
800 int rpc_status;
801 int cancelled;
802};
803
804
805static void nfs4_init_opendata_res(struct nfs4_opendata *p)
806{
807 p->o_res.f_attr = &p->f_attr;
808 p->o_res.dir_attr = &p->dir_attr;
809 p->o_res.seqid = p->o_arg.seqid;
810 p->c_res.seqid = p->c_arg.seqid;
811 p->o_res.server = p->o_arg.server;
812 nfs_fattr_init(&p->f_attr);
813 nfs_fattr_init(&p->dir_attr);
814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
815}
816
817static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
819 const struct iattr *attrs,
820 gfp_t gfp_mask)
821{
822 struct dentry *parent = dget_parent(dentry);
823 struct inode *dir = parent->d_inode;
824 struct nfs_server *server = NFS_SERVER(dir);
825 struct nfs4_opendata *p;
826
827 p = kzalloc(sizeof(*p), gfp_mask);
828 if (p == NULL)
829 goto err;
830 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
831 if (p->o_arg.seqid == NULL)
832 goto err_free;
833 nfs_sb_active(dentry->d_sb);
834 p->dentry = dget(dentry);
835 p->dir = parent;
836 p->owner = sp;
837 atomic_inc(&sp->so_count);
838 p->o_arg.fh = NFS_FH(dir);
839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
841 p->o_arg.clientid = server->nfs_client->cl_clientid;
842 p->o_arg.id = sp->so_seqid.owner_id;
843 p->o_arg.name = &dentry->d_name;
844 p->o_arg.server = server;
845 p->o_arg.bitmask = server->attr_bitmask;
846 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
847 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
848 if (attrs != NULL && attrs->ia_valid != 0) {
849 __be32 verf[2];
850
851 p->o_arg.u.attrs = &p->attrs;
852 memcpy(&p->attrs, attrs, sizeof(p->attrs));
853
854 verf[0] = jiffies;
855 verf[1] = current->pid;
856 memcpy(p->o_arg.u.verifier.data, verf,
857 sizeof(p->o_arg.u.verifier.data));
858 }
859 p->c_arg.fh = &p->o_res.fh;
860 p->c_arg.stateid = &p->o_res.stateid;
861 p->c_arg.seqid = p->o_arg.seqid;
862 nfs4_init_opendata_res(p);
863 kref_init(&p->kref);
864 return p;
865err_free:
866 kfree(p);
867err:
868 dput(parent);
869 return NULL;
870}
871
872static void nfs4_opendata_free(struct kref *kref)
873{
874 struct nfs4_opendata *p = container_of(kref,
875 struct nfs4_opendata, kref);
876 struct super_block *sb = p->dentry->d_sb;
877
878 nfs_free_seqid(p->o_arg.seqid);
879 if (p->state != NULL)
880 nfs4_put_open_state(p->state);
881 nfs4_put_state_owner(p->owner);
882 dput(p->dir);
883 dput(p->dentry);
884 nfs_sb_deactive(sb);
885 nfs_fattr_free_names(&p->f_attr);
886 kfree(p);
887}
888
889static void nfs4_opendata_put(struct nfs4_opendata *p)
890{
891 if (p != NULL)
892 kref_put(&p->kref, nfs4_opendata_free);
893}
894
895static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
896{
897 int ret;
898
899 ret = rpc_wait_for_completion_task(task);
900 return ret;
901}
902
903static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
904{
905 int ret = 0;
906
907 if (open_mode & (O_EXCL|O_TRUNC))
908 goto out;
909 switch (mode & (FMODE_READ|FMODE_WRITE)) {
910 case FMODE_READ:
911 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
912 && state->n_rdonly != 0;
913 break;
914 case FMODE_WRITE:
915 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
916 && state->n_wronly != 0;
917 break;
918 case FMODE_READ|FMODE_WRITE:
919 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
920 && state->n_rdwr != 0;
921 }
922out:
923 return ret;
924}
925
926static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
927{
928 if (delegation == NULL)
929 return 0;
930 if ((delegation->type & fmode) != fmode)
931 return 0;
932 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
933 return 0;
934 nfs_mark_delegation_referenced(delegation);
935 return 1;
936}
937
938static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
939{
940 switch (fmode) {
941 case FMODE_WRITE:
942 state->n_wronly++;
943 break;
944 case FMODE_READ:
945 state->n_rdonly++;
946 break;
947 case FMODE_READ|FMODE_WRITE:
948 state->n_rdwr++;
949 }
950 nfs4_state_set_mode_locked(state, state->state | fmode);
951}
952
953static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
954{
955 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
956 nfs4_stateid_copy(&state->stateid, stateid);
957 nfs4_stateid_copy(&state->open_stateid, stateid);
958 switch (fmode) {
959 case FMODE_READ:
960 set_bit(NFS_O_RDONLY_STATE, &state->flags);
961 break;
962 case FMODE_WRITE:
963 set_bit(NFS_O_WRONLY_STATE, &state->flags);
964 break;
965 case FMODE_READ|FMODE_WRITE:
966 set_bit(NFS_O_RDWR_STATE, &state->flags);
967 }
968}
969
970static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
971{
972 write_seqlock(&state->seqlock);
973 nfs_set_open_stateid_locked(state, stateid, fmode);
974 write_sequnlock(&state->seqlock);
975}
976
977static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
978{
979 /*
980 * Protect the call to nfs4_state_set_mode_locked and
981 * serialise the stateid update
982 */
983 write_seqlock(&state->seqlock);
984 if (deleg_stateid != NULL) {
985 nfs4_stateid_copy(&state->stateid, deleg_stateid);
986 set_bit(NFS_DELEGATED_STATE, &state->flags);
987 }
988 if (open_stateid != NULL)
989 nfs_set_open_stateid_locked(state, open_stateid, fmode);
990 write_sequnlock(&state->seqlock);
991 spin_lock(&state->owner->so_lock);
992 update_open_stateflags(state, fmode);
993 spin_unlock(&state->owner->so_lock);
994}
995
996static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
997{
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_delegation *deleg_cur;
1000 int ret = 0;
1001
1002 fmode &= (FMODE_READ|FMODE_WRITE);
1003
1004 rcu_read_lock();
1005 deleg_cur = rcu_dereference(nfsi->delegation);
1006 if (deleg_cur == NULL)
1007 goto no_delegation;
1008
1009 spin_lock(&deleg_cur->lock);
1010 if (nfsi->delegation != deleg_cur ||
1011 (deleg_cur->type & fmode) != fmode)
1012 goto no_delegation_unlock;
1013
1014 if (delegation == NULL)
1015 delegation = &deleg_cur->stateid;
1016 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1017 goto no_delegation_unlock;
1018
1019 nfs_mark_delegation_referenced(deleg_cur);
1020 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1021 ret = 1;
1022no_delegation_unlock:
1023 spin_unlock(&deleg_cur->lock);
1024no_delegation:
1025 rcu_read_unlock();
1026
1027 if (!ret && open_stateid != NULL) {
1028 __update_open_stateid(state, open_stateid, NULL, fmode);
1029 ret = 1;
1030 }
1031
1032 return ret;
1033}
1034
1035
1036static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1037{
1038 struct nfs_delegation *delegation;
1039
1040 rcu_read_lock();
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
1042 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1043 rcu_read_unlock();
1044 return;
1045 }
1046 rcu_read_unlock();
1047 nfs_inode_return_delegation(inode);
1048}
1049
1050static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1051{
1052 struct nfs4_state *state = opendata->state;
1053 struct nfs_inode *nfsi = NFS_I(state->inode);
1054 struct nfs_delegation *delegation;
1055 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1056 fmode_t fmode = opendata->o_arg.fmode;
1057 nfs4_stateid stateid;
1058 int ret = -EAGAIN;
1059
1060 for (;;) {
1061 if (can_open_cached(state, fmode, open_mode)) {
1062 spin_lock(&state->owner->so_lock);
1063 if (can_open_cached(state, fmode, open_mode)) {
1064 update_open_stateflags(state, fmode);
1065 spin_unlock(&state->owner->so_lock);
1066 goto out_return_state;
1067 }
1068 spin_unlock(&state->owner->so_lock);
1069 }
1070 rcu_read_lock();
1071 delegation = rcu_dereference(nfsi->delegation);
1072 if (!can_open_delegated(delegation, fmode)) {
1073 rcu_read_unlock();
1074 break;
1075 }
1076 /* Save the delegation */
1077 nfs4_stateid_copy(&stateid, &delegation->stateid);
1078 rcu_read_unlock();
1079 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1080 if (ret != 0)
1081 goto out;
1082 ret = -EAGAIN;
1083
1084 /* Try to update the stateid using the delegation */
1085 if (update_open_stateid(state, NULL, &stateid, fmode))
1086 goto out_return_state;
1087 }
1088out:
1089 return ERR_PTR(ret);
1090out_return_state:
1091 atomic_inc(&state->count);
1092 return state;
1093}
1094
1095static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1096{
1097 struct inode *inode;
1098 struct nfs4_state *state = NULL;
1099 struct nfs_delegation *delegation;
1100 int ret;
1101
1102 if (!data->rpc_done) {
1103 state = nfs4_try_open_cached(data);
1104 goto out;
1105 }
1106
1107 ret = -EAGAIN;
1108 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1109 goto err;
1110 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1111 ret = PTR_ERR(inode);
1112 if (IS_ERR(inode))
1113 goto err;
1114 ret = -ENOMEM;
1115 state = nfs4_get_open_state(inode, data->owner);
1116 if (state == NULL)
1117 goto err_put_inode;
1118 if (data->o_res.delegation_type != 0) {
1119 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1120 int delegation_flags = 0;
1121
1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1131 clp->cl_hostname);
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140 }
1141
1142 update_open_stateid(state, &data->o_res.stateid, NULL,
1143 data->o_arg.fmode);
1144 iput(inode);
1145out:
1146 return state;
1147err_put_inode:
1148 iput(inode);
1149err:
1150 return ERR_PTR(ret);
1151}
1152
1153static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1154{
1155 struct nfs_inode *nfsi = NFS_I(state->inode);
1156 struct nfs_open_context *ctx;
1157
1158 spin_lock(&state->inode->i_lock);
1159 list_for_each_entry(ctx, &nfsi->open_files, list) {
1160 if (ctx->state != state)
1161 continue;
1162 get_nfs_open_context(ctx);
1163 spin_unlock(&state->inode->i_lock);
1164 return ctx;
1165 }
1166 spin_unlock(&state->inode->i_lock);
1167 return ERR_PTR(-ENOENT);
1168}
1169
1170static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1171{
1172 struct nfs4_opendata *opendata;
1173
1174 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1175 if (opendata == NULL)
1176 return ERR_PTR(-ENOMEM);
1177 opendata->state = state;
1178 atomic_inc(&state->count);
1179 return opendata;
1180}
1181
1182static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1183{
1184 struct nfs4_state *newstate;
1185 int ret;
1186
1187 opendata->o_arg.open_flags = 0;
1188 opendata->o_arg.fmode = fmode;
1189 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1190 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1191 nfs4_init_opendata_res(opendata);
1192 ret = _nfs4_recover_proc_open(opendata);
1193 if (ret != 0)
1194 return ret;
1195 newstate = nfs4_opendata_to_nfs4_state(opendata);
1196 if (IS_ERR(newstate))
1197 return PTR_ERR(newstate);
1198 nfs4_close_state(newstate, fmode);
1199 *res = newstate;
1200 return 0;
1201}
1202
1203static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1204{
1205 struct nfs4_state *newstate;
1206 int ret;
1207
1208 /* memory barrier prior to reading state->n_* */
1209 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1210 smp_rmb();
1211 if (state->n_rdwr != 0) {
1212 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1213 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1214 if (ret != 0)
1215 return ret;
1216 if (newstate != state)
1217 return -ESTALE;
1218 }
1219 if (state->n_wronly != 0) {
1220 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1221 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1222 if (ret != 0)
1223 return ret;
1224 if (newstate != state)
1225 return -ESTALE;
1226 }
1227 if (state->n_rdonly != 0) {
1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1229 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1230 if (ret != 0)
1231 return ret;
1232 if (newstate != state)
1233 return -ESTALE;
1234 }
1235 /*
1236 * We may have performed cached opens for all three recoveries.
1237 * Check if we need to update the current stateid.
1238 */
1239 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1240 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1241 write_seqlock(&state->seqlock);
1242 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1243 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1244 write_sequnlock(&state->seqlock);
1245 }
1246 return 0;
1247}
1248
1249/*
1250 * OPEN_RECLAIM:
1251 * reclaim state on the server after a reboot.
1252 */
1253static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1254{
1255 struct nfs_delegation *delegation;
1256 struct nfs4_opendata *opendata;
1257 fmode_t delegation_type = 0;
1258 int status;
1259
1260 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1261 if (IS_ERR(opendata))
1262 return PTR_ERR(opendata);
1263 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1264 opendata->o_arg.fh = NFS_FH(state->inode);
1265 rcu_read_lock();
1266 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1267 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1268 delegation_type = delegation->type;
1269 rcu_read_unlock();
1270 opendata->o_arg.u.delegation_type = delegation_type;
1271 status = nfs4_open_recover(opendata, state);
1272 nfs4_opendata_put(opendata);
1273 return status;
1274}
1275
1276static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1277{
1278 struct nfs_server *server = NFS_SERVER(state->inode);
1279 struct nfs4_exception exception = { };
1280 int err;
1281 do {
1282 err = _nfs4_do_open_reclaim(ctx, state);
1283 if (err != -NFS4ERR_DELAY)
1284 break;
1285 nfs4_handle_exception(server, err, &exception);
1286 } while (exception.retry);
1287 return err;
1288}
1289
1290static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1291{
1292 struct nfs_open_context *ctx;
1293 int ret;
1294
1295 ctx = nfs4_state_find_open_context(state);
1296 if (IS_ERR(ctx))
1297 return PTR_ERR(ctx);
1298 ret = nfs4_do_open_reclaim(ctx, state);
1299 put_nfs_open_context(ctx);
1300 return ret;
1301}
1302
1303static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1304{
1305 struct nfs4_opendata *opendata;
1306 int ret;
1307
1308 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1309 if (IS_ERR(opendata))
1310 return PTR_ERR(opendata);
1311 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1312 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1313 ret = nfs4_open_recover(opendata, state);
1314 nfs4_opendata_put(opendata);
1315 return ret;
1316}
1317
1318int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1319{
1320 struct nfs4_exception exception = { };
1321 struct nfs_server *server = NFS_SERVER(state->inode);
1322 int err;
1323 do {
1324 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1325 switch (err) {
1326 case 0:
1327 case -ENOENT:
1328 case -ESTALE:
1329 goto out;
1330 case -NFS4ERR_BADSESSION:
1331 case -NFS4ERR_BADSLOT:
1332 case -NFS4ERR_BAD_HIGH_SLOT:
1333 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1334 case -NFS4ERR_DEADSESSION:
1335 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1336 goto out;
1337 case -NFS4ERR_STALE_CLIENTID:
1338 case -NFS4ERR_STALE_STATEID:
1339 case -NFS4ERR_EXPIRED:
1340 /* Don't recall a delegation if it was lost */
1341 nfs4_schedule_lease_recovery(server->nfs_client);
1342 goto out;
1343 case -ERESTARTSYS:
1344 /*
1345 * The show must go on: exit, but mark the
1346 * stateid as needing recovery.
1347 */
1348 case -NFS4ERR_DELEG_REVOKED:
1349 case -NFS4ERR_ADMIN_REVOKED:
1350 case -NFS4ERR_BAD_STATEID:
1351 nfs_inode_find_state_and_recover(state->inode,
1352 stateid);
1353 nfs4_schedule_stateid_recovery(server, state);
1354 case -EKEYEXPIRED:
1355 /*
1356 * User RPCSEC_GSS context has expired.
1357 * We cannot recover this stateid now, so
1358 * skip it and allow recovery thread to
1359 * proceed.
1360 */
1361 case -ENOMEM:
1362 err = 0;
1363 goto out;
1364 }
1365 err = nfs4_handle_exception(server, err, &exception);
1366 } while (exception.retry);
1367out:
1368 return err;
1369}
1370
1371static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1372{
1373 struct nfs4_opendata *data = calldata;
1374
1375 data->rpc_status = task->tk_status;
1376 if (data->rpc_status == 0) {
1377 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1378 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1379 renew_lease(data->o_res.server, data->timestamp);
1380 data->rpc_done = 1;
1381 }
1382}
1383
1384static void nfs4_open_confirm_release(void *calldata)
1385{
1386 struct nfs4_opendata *data = calldata;
1387 struct nfs4_state *state = NULL;
1388
1389 /* If this request hasn't been cancelled, do nothing */
1390 if (data->cancelled == 0)
1391 goto out_free;
1392 /* In case of error, no cleanup! */
1393 if (!data->rpc_done)
1394 goto out_free;
1395 state = nfs4_opendata_to_nfs4_state(data);
1396 if (!IS_ERR(state))
1397 nfs4_close_state(state, data->o_arg.fmode);
1398out_free:
1399 nfs4_opendata_put(data);
1400}
1401
1402static const struct rpc_call_ops nfs4_open_confirm_ops = {
1403 .rpc_call_done = nfs4_open_confirm_done,
1404 .rpc_release = nfs4_open_confirm_release,
1405};
1406
1407/*
1408 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1409 */
1410static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1411{
1412 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1413 struct rpc_task *task;
1414 struct rpc_message msg = {
1415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1416 .rpc_argp = &data->c_arg,
1417 .rpc_resp = &data->c_res,
1418 .rpc_cred = data->owner->so_cred,
1419 };
1420 struct rpc_task_setup task_setup_data = {
1421 .rpc_client = server->client,
1422 .rpc_message = &msg,
1423 .callback_ops = &nfs4_open_confirm_ops,
1424 .callback_data = data,
1425 .workqueue = nfsiod_workqueue,
1426 .flags = RPC_TASK_ASYNC,
1427 };
1428 int status;
1429
1430 kref_get(&data->kref);
1431 data->rpc_done = 0;
1432 data->rpc_status = 0;
1433 data->timestamp = jiffies;
1434 task = rpc_run_task(&task_setup_data);
1435 if (IS_ERR(task))
1436 return PTR_ERR(task);
1437 status = nfs4_wait_for_completion_rpc_task(task);
1438 if (status != 0) {
1439 data->cancelled = 1;
1440 smp_wmb();
1441 } else
1442 status = data->rpc_status;
1443 rpc_put_task(task);
1444 return status;
1445}
1446
1447static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1448{
1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state_owner *sp = data->owner;
1451
1452 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1453 return;
1454 /*
1455 * Check if we still need to send an OPEN call, or if we can use
1456 * a delegation instead.
1457 */
1458 if (data->state != NULL) {
1459 struct nfs_delegation *delegation;
1460
1461 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1462 goto out_no_action;
1463 rcu_read_lock();
1464 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1465 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1466 can_open_delegated(delegation, data->o_arg.fmode))
1467 goto unlock_no_action;
1468 rcu_read_unlock();
1469 }
1470 /* Update sequence id. */
1471 data->o_arg.id = sp->so_seqid.owner_id;
1472 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1473 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1474 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1475 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1476 }
1477 data->timestamp = jiffies;
1478 if (nfs4_setup_sequence(data->o_arg.server,
1479 &data->o_arg.seq_args,
1480 &data->o_res.seq_res, task))
1481 return;
1482 rpc_call_start(task);
1483 return;
1484unlock_no_action:
1485 rcu_read_unlock();
1486out_no_action:
1487 task->tk_action = NULL;
1488
1489}
1490
1491static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1492{
1493 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1494 nfs4_open_prepare(task, calldata);
1495}
1496
1497static void nfs4_open_done(struct rpc_task *task, void *calldata)
1498{
1499 struct nfs4_opendata *data = calldata;
1500
1501 data->rpc_status = task->tk_status;
1502
1503 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1504 return;
1505
1506 if (task->tk_status == 0) {
1507 switch (data->o_res.f_attr->mode & S_IFMT) {
1508 case S_IFREG:
1509 break;
1510 case S_IFLNK:
1511 data->rpc_status = -ELOOP;
1512 break;
1513 case S_IFDIR:
1514 data->rpc_status = -EISDIR;
1515 break;
1516 default:
1517 data->rpc_status = -ENOTDIR;
1518 }
1519 renew_lease(data->o_res.server, data->timestamp);
1520 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1521 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1522 }
1523 data->rpc_done = 1;
1524}
1525
1526static void nfs4_open_release(void *calldata)
1527{
1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state *state = NULL;
1530
1531 /* If this request hasn't been cancelled, do nothing */
1532 if (data->cancelled == 0)
1533 goto out_free;
1534 /* In case of error, no cleanup! */
1535 if (data->rpc_status != 0 || !data->rpc_done)
1536 goto out_free;
1537 /* In case we need an open_confirm, no cleanup! */
1538 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1539 goto out_free;
1540 state = nfs4_opendata_to_nfs4_state(data);
1541 if (!IS_ERR(state))
1542 nfs4_close_state(state, data->o_arg.fmode);
1543out_free:
1544 nfs4_opendata_put(data);
1545}
1546
1547static const struct rpc_call_ops nfs4_open_ops = {
1548 .rpc_call_prepare = nfs4_open_prepare,
1549 .rpc_call_done = nfs4_open_done,
1550 .rpc_release = nfs4_open_release,
1551};
1552
1553static const struct rpc_call_ops nfs4_recover_open_ops = {
1554 .rpc_call_prepare = nfs4_recover_open_prepare,
1555 .rpc_call_done = nfs4_open_done,
1556 .rpc_release = nfs4_open_release,
1557};
1558
1559static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1560{
1561 struct inode *dir = data->dir->d_inode;
1562 struct nfs_server *server = NFS_SERVER(dir);
1563 struct nfs_openargs *o_arg = &data->o_arg;
1564 struct nfs_openres *o_res = &data->o_res;
1565 struct rpc_task *task;
1566 struct rpc_message msg = {
1567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1568 .rpc_argp = o_arg,
1569 .rpc_resp = o_res,
1570 .rpc_cred = data->owner->so_cred,
1571 };
1572 struct rpc_task_setup task_setup_data = {
1573 .rpc_client = server->client,
1574 .rpc_message = &msg,
1575 .callback_ops = &nfs4_open_ops,
1576 .callback_data = data,
1577 .workqueue = nfsiod_workqueue,
1578 .flags = RPC_TASK_ASYNC,
1579 };
1580 int status;
1581
1582 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1583 kref_get(&data->kref);
1584 data->rpc_done = 0;
1585 data->rpc_status = 0;
1586 data->cancelled = 0;
1587 if (isrecover)
1588 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1589 task = rpc_run_task(&task_setup_data);
1590 if (IS_ERR(task))
1591 return PTR_ERR(task);
1592 status = nfs4_wait_for_completion_rpc_task(task);
1593 if (status != 0) {
1594 data->cancelled = 1;
1595 smp_wmb();
1596 } else
1597 status = data->rpc_status;
1598 rpc_put_task(task);
1599
1600 return status;
1601}
1602
1603static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1604{
1605 struct inode *dir = data->dir->d_inode;
1606 struct nfs_openres *o_res = &data->o_res;
1607 int status;
1608
1609 status = nfs4_run_open_task(data, 1);
1610 if (status != 0 || !data->rpc_done)
1611 return status;
1612
1613 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1614
1615 nfs_refresh_inode(dir, o_res->dir_attr);
1616
1617 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1618 status = _nfs4_proc_open_confirm(data);
1619 if (status != 0)
1620 return status;
1621 }
1622
1623 return status;
1624}
1625
1626/*
1627 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1628 */
1629static int _nfs4_proc_open(struct nfs4_opendata *data)
1630{
1631 struct inode *dir = data->dir->d_inode;
1632 struct nfs_server *server = NFS_SERVER(dir);
1633 struct nfs_openargs *o_arg = &data->o_arg;
1634 struct nfs_openres *o_res = &data->o_res;
1635 int status;
1636
1637 status = nfs4_run_open_task(data, 0);
1638 if (!data->rpc_done)
1639 return status;
1640 if (status != 0) {
1641 if (status == -NFS4ERR_BADNAME &&
1642 !(o_arg->open_flags & O_CREAT))
1643 return -ENOENT;
1644 return status;
1645 }
1646
1647 nfs_fattr_map_and_free_names(server, &data->f_attr);
1648
1649 if (o_arg->open_flags & O_CREAT) {
1650 update_changeattr(dir, &o_res->cinfo);
1651 nfs_post_op_update_inode(dir, o_res->dir_attr);
1652 } else
1653 nfs_refresh_inode(dir, o_res->dir_attr);
1654 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1655 server->caps &= ~NFS_CAP_POSIX_LOCK;
1656 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1657 status = _nfs4_proc_open_confirm(data);
1658 if (status != 0)
1659 return status;
1660 }
1661 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1662 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1663 return 0;
1664}
1665
1666static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1667{
1668 unsigned int loop;
1669 int ret;
1670
1671 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1672 ret = nfs4_wait_clnt_recover(clp);
1673 if (ret != 0)
1674 break;
1675 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1676 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1677 break;
1678 nfs4_schedule_state_manager(clp);
1679 ret = -EIO;
1680 }
1681 return ret;
1682}
1683
1684static int nfs4_recover_expired_lease(struct nfs_server *server)
1685{
1686 return nfs4_client_recover_expired_lease(server->nfs_client);
1687}
1688
1689/*
1690 * OPEN_EXPIRED:
1691 * reclaim state on the server after a network partition.
1692 * Assumes caller holds the appropriate lock
1693 */
1694static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1695{
1696 struct nfs4_opendata *opendata;
1697 int ret;
1698
1699 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1700 if (IS_ERR(opendata))
1701 return PTR_ERR(opendata);
1702 ret = nfs4_open_recover(opendata, state);
1703 if (ret == -ESTALE)
1704 d_drop(ctx->dentry);
1705 nfs4_opendata_put(opendata);
1706 return ret;
1707}
1708
1709static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1710{
1711 struct nfs_server *server = NFS_SERVER(state->inode);
1712 struct nfs4_exception exception = { };
1713 int err;
1714
1715 do {
1716 err = _nfs4_open_expired(ctx, state);
1717 switch (err) {
1718 default:
1719 goto out;
1720 case -NFS4ERR_GRACE:
1721 case -NFS4ERR_DELAY:
1722 nfs4_handle_exception(server, err, &exception);
1723 err = 0;
1724 }
1725 } while (exception.retry);
1726out:
1727 return err;
1728}
1729
1730static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1731{
1732 struct nfs_open_context *ctx;
1733 int ret;
1734
1735 ctx = nfs4_state_find_open_context(state);
1736 if (IS_ERR(ctx))
1737 return PTR_ERR(ctx);
1738 ret = nfs4_do_open_expired(ctx, state);
1739 put_nfs_open_context(ctx);
1740 return ret;
1741}
1742
1743#if defined(CONFIG_NFS_V4_1)
1744static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1745{
1746 int status = NFS_OK;
1747 struct nfs_server *server = NFS_SERVER(state->inode);
1748
1749 if (state->flags & flags) {
1750 status = nfs41_test_stateid(server, stateid);
1751 if (status != NFS_OK) {
1752 nfs41_free_stateid(server, stateid);
1753 state->flags &= ~flags;
1754 }
1755 }
1756 return status;
1757}
1758
1759static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1760{
1761 int deleg_status, open_status;
1762 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1763 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1764
1765 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1766 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1767
1768 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1769 return NFS_OK;
1770 return nfs4_open_expired(sp, state);
1771}
1772#endif
1773
1774/*
1775 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1776 * fields corresponding to attributes that were used to store the verifier.
1777 * Make sure we clobber those fields in the later setattr call
1778 */
1779static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1780{
1781 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1782 !(sattr->ia_valid & ATTR_ATIME_SET))
1783 sattr->ia_valid |= ATTR_ATIME;
1784
1785 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1786 !(sattr->ia_valid & ATTR_MTIME_SET))
1787 sattr->ia_valid |= ATTR_MTIME;
1788}
1789
1790/*
1791 * Returns a referenced nfs4_state
1792 */
1793static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1794{
1795 struct nfs4_state_owner *sp;
1796 struct nfs4_state *state = NULL;
1797 struct nfs_server *server = NFS_SERVER(dir);
1798 struct nfs4_opendata *opendata;
1799 int status;
1800
1801 /* Protect against reboot recovery conflicts */
1802 status = -ENOMEM;
1803 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1804 if (sp == NULL) {
1805 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1806 goto out_err;
1807 }
1808 status = nfs4_recover_expired_lease(server);
1809 if (status != 0)
1810 goto err_put_state_owner;
1811 if (dentry->d_inode != NULL)
1812 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1813 status = -ENOMEM;
1814 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1815 if (opendata == NULL)
1816 goto err_put_state_owner;
1817
1818 if (dentry->d_inode != NULL)
1819 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1820
1821 status = _nfs4_proc_open(opendata);
1822 if (status != 0)
1823 goto err_opendata_put;
1824
1825 state = nfs4_opendata_to_nfs4_state(opendata);
1826 status = PTR_ERR(state);
1827 if (IS_ERR(state))
1828 goto err_opendata_put;
1829 if (server->caps & NFS_CAP_POSIX_LOCK)
1830 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1831
1832 if (opendata->o_arg.open_flags & O_EXCL) {
1833 nfs4_exclusive_attrset(opendata, sattr);
1834
1835 nfs_fattr_init(opendata->o_res.f_attr);
1836 status = nfs4_do_setattr(state->inode, cred,
1837 opendata->o_res.f_attr, sattr,
1838 state);
1839 if (status == 0)
1840 nfs_setattr_update_inode(state->inode, sattr);
1841 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1842 }
1843 nfs4_opendata_put(opendata);
1844 nfs4_put_state_owner(sp);
1845 *res = state;
1846 return 0;
1847err_opendata_put:
1848 nfs4_opendata_put(opendata);
1849err_put_state_owner:
1850 nfs4_put_state_owner(sp);
1851out_err:
1852 *res = NULL;
1853 return status;
1854}
1855
1856
1857static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1858{
1859 struct nfs4_exception exception = { };
1860 struct nfs4_state *res;
1861 int status;
1862
1863 do {
1864 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1865 if (status == 0)
1866 break;
1867 /* NOTE: BAD_SEQID means the server and client disagree about the
1868 * book-keeping w.r.t. state-changing operations
1869 * (OPEN/CLOSE/LOCK/LOCKU...)
1870 * It is actually a sign of a bug on the client or on the server.
1871 *
1872 * If we receive a BAD_SEQID error in the particular case of
1873 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1874 * have unhashed the old state_owner for us, and that we can
1875 * therefore safely retry using a new one. We should still warn
1876 * the user though...
1877 */
1878 if (status == -NFS4ERR_BAD_SEQID) {
1879 pr_warn_ratelimited("NFS: v4 server %s "
1880 " returned a bad sequence-id error!\n",
1881 NFS_SERVER(dir)->nfs_client->cl_hostname);
1882 exception.retry = 1;
1883 continue;
1884 }
1885 /*
1886 * BAD_STATEID on OPEN means that the server cancelled our
1887 * state before it received the OPEN_CONFIRM.
1888 * Recover by retrying the request as per the discussion
1889 * on Page 181 of RFC3530.
1890 */
1891 if (status == -NFS4ERR_BAD_STATEID) {
1892 exception.retry = 1;
1893 continue;
1894 }
1895 if (status == -EAGAIN) {
1896 /* We must have found a delegation */
1897 exception.retry = 1;
1898 continue;
1899 }
1900 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1901 status, &exception));
1902 } while (exception.retry);
1903 return res;
1904}
1905
1906static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1907 struct nfs_fattr *fattr, struct iattr *sattr,
1908 struct nfs4_state *state)
1909{
1910 struct nfs_server *server = NFS_SERVER(inode);
1911 struct nfs_setattrargs arg = {
1912 .fh = NFS_FH(inode),
1913 .iap = sattr,
1914 .server = server,
1915 .bitmask = server->attr_bitmask,
1916 };
1917 struct nfs_setattrres res = {
1918 .fattr = fattr,
1919 .server = server,
1920 };
1921 struct rpc_message msg = {
1922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1923 .rpc_argp = &arg,
1924 .rpc_resp = &res,
1925 .rpc_cred = cred,
1926 };
1927 unsigned long timestamp = jiffies;
1928 int status;
1929
1930 nfs_fattr_init(fattr);
1931
1932 if (state != NULL) {
1933 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1934 current->files, current->tgid);
1935 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1936 FMODE_WRITE)) {
1937 /* Use that stateid */
1938 } else
1939 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1940
1941 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1942 if (status == 0 && state != NULL)
1943 renew_lease(server, timestamp);
1944 return status;
1945}
1946
1947static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1948 struct nfs_fattr *fattr, struct iattr *sattr,
1949 struct nfs4_state *state)
1950{
1951 struct nfs_server *server = NFS_SERVER(inode);
1952 struct nfs4_exception exception = {
1953 .state = state,
1954 .inode = inode,
1955 };
1956 int err;
1957 do {
1958 err = nfs4_handle_exception(server,
1959 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1960 &exception);
1961 } while (exception.retry);
1962 return err;
1963}
1964
1965struct nfs4_closedata {
1966 struct inode *inode;
1967 struct nfs4_state *state;
1968 struct nfs_closeargs arg;
1969 struct nfs_closeres res;
1970 struct nfs_fattr fattr;
1971 unsigned long timestamp;
1972 bool roc;
1973 u32 roc_barrier;
1974};
1975
1976static void nfs4_free_closedata(void *data)
1977{
1978 struct nfs4_closedata *calldata = data;
1979 struct nfs4_state_owner *sp = calldata->state->owner;
1980 struct super_block *sb = calldata->state->inode->i_sb;
1981
1982 if (calldata->roc)
1983 pnfs_roc_release(calldata->state->inode);
1984 nfs4_put_open_state(calldata->state);
1985 nfs_free_seqid(calldata->arg.seqid);
1986 nfs4_put_state_owner(sp);
1987 nfs_sb_deactive(sb);
1988 kfree(calldata);
1989}
1990
1991static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1992 fmode_t fmode)
1993{
1994 spin_lock(&state->owner->so_lock);
1995 if (!(fmode & FMODE_READ))
1996 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1997 if (!(fmode & FMODE_WRITE))
1998 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1999 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2000 spin_unlock(&state->owner->so_lock);
2001}
2002
2003static void nfs4_close_done(struct rpc_task *task, void *data)
2004{
2005 struct nfs4_closedata *calldata = data;
2006 struct nfs4_state *state = calldata->state;
2007 struct nfs_server *server = NFS_SERVER(calldata->inode);
2008
2009 dprintk("%s: begin!\n", __func__);
2010 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2011 return;
2012 /* hmm. we are done with the inode, and in the process of freeing
2013 * the state_owner. we keep this around to process errors
2014 */
2015 switch (task->tk_status) {
2016 case 0:
2017 if (calldata->roc)
2018 pnfs_roc_set_barrier(state->inode,
2019 calldata->roc_barrier);
2020 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2021 renew_lease(server, calldata->timestamp);
2022 nfs4_close_clear_stateid_flags(state,
2023 calldata->arg.fmode);
2024 break;
2025 case -NFS4ERR_STALE_STATEID:
2026 case -NFS4ERR_OLD_STATEID:
2027 case -NFS4ERR_BAD_STATEID:
2028 case -NFS4ERR_EXPIRED:
2029 if (calldata->arg.fmode == 0)
2030 break;
2031 default:
2032 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2033 rpc_restart_call_prepare(task);
2034 }
2035 nfs_release_seqid(calldata->arg.seqid);
2036 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2037 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2038}
2039
2040static void nfs4_close_prepare(struct rpc_task *task, void *data)
2041{
2042 struct nfs4_closedata *calldata = data;
2043 struct nfs4_state *state = calldata->state;
2044 int call_close = 0;
2045
2046 dprintk("%s: begin!\n", __func__);
2047 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2048 return;
2049
2050 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2051 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2052 spin_lock(&state->owner->so_lock);
2053 /* Calculate the change in open mode */
2054 if (state->n_rdwr == 0) {
2055 if (state->n_rdonly == 0) {
2056 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2057 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2058 calldata->arg.fmode &= ~FMODE_READ;
2059 }
2060 if (state->n_wronly == 0) {
2061 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2062 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2063 calldata->arg.fmode &= ~FMODE_WRITE;
2064 }
2065 }
2066 spin_unlock(&state->owner->so_lock);
2067
2068 if (!call_close) {
2069 /* Note: exit _without_ calling nfs4_close_done */
2070 task->tk_action = NULL;
2071 goto out;
2072 }
2073
2074 if (calldata->arg.fmode == 0) {
2075 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2076 if (calldata->roc &&
2077 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2078 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2079 task, NULL);
2080 goto out;
2081 }
2082 }
2083
2084 nfs_fattr_init(calldata->res.fattr);
2085 calldata->timestamp = jiffies;
2086 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2087 &calldata->arg.seq_args,
2088 &calldata->res.seq_res,
2089 task))
2090 goto out;
2091 rpc_call_start(task);
2092out:
2093 dprintk("%s: done!\n", __func__);
2094}
2095
2096static const struct rpc_call_ops nfs4_close_ops = {
2097 .rpc_call_prepare = nfs4_close_prepare,
2098 .rpc_call_done = nfs4_close_done,
2099 .rpc_release = nfs4_free_closedata,
2100};
2101
2102/*
2103 * It is possible for data to be read/written from a mem-mapped file
2104 * after the sys_close call (which hits the vfs layer as a flush).
2105 * This means that we can't safely call nfsv4 close on a file until
2106 * the inode is cleared. This in turn means that we are not good
2107 * NFSv4 citizens - we do not indicate to the server to update the file's
2108 * share state even when we are done with one of the three share
2109 * stateid's in the inode.
2110 *
2111 * NOTE: Caller must be holding the sp->so_owner semaphore!
2112 */
2113int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2114{
2115 struct nfs_server *server = NFS_SERVER(state->inode);
2116 struct nfs4_closedata *calldata;
2117 struct nfs4_state_owner *sp = state->owner;
2118 struct rpc_task *task;
2119 struct rpc_message msg = {
2120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2121 .rpc_cred = state->owner->so_cred,
2122 };
2123 struct rpc_task_setup task_setup_data = {
2124 .rpc_client = server->client,
2125 .rpc_message = &msg,
2126 .callback_ops = &nfs4_close_ops,
2127 .workqueue = nfsiod_workqueue,
2128 .flags = RPC_TASK_ASYNC,
2129 };
2130 int status = -ENOMEM;
2131
2132 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2133 if (calldata == NULL)
2134 goto out;
2135 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2136 calldata->inode = state->inode;
2137 calldata->state = state;
2138 calldata->arg.fh = NFS_FH(state->inode);
2139 calldata->arg.stateid = &state->open_stateid;
2140 /* Serialization for the sequence id */
2141 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2142 if (calldata->arg.seqid == NULL)
2143 goto out_free_calldata;
2144 calldata->arg.fmode = 0;
2145 calldata->arg.bitmask = server->cache_consistency_bitmask;
2146 calldata->res.fattr = &calldata->fattr;
2147 calldata->res.seqid = calldata->arg.seqid;
2148 calldata->res.server = server;
2149 calldata->roc = roc;
2150 nfs_sb_active(calldata->inode->i_sb);
2151
2152 msg.rpc_argp = &calldata->arg;
2153 msg.rpc_resp = &calldata->res;
2154 task_setup_data.callback_data = calldata;
2155 task = rpc_run_task(&task_setup_data);
2156 if (IS_ERR(task))
2157 return PTR_ERR(task);
2158 status = 0;
2159 if (wait)
2160 status = rpc_wait_for_completion_task(task);
2161 rpc_put_task(task);
2162 return status;
2163out_free_calldata:
2164 kfree(calldata);
2165out:
2166 if (roc)
2167 pnfs_roc_release(state->inode);
2168 nfs4_put_open_state(state);
2169 nfs4_put_state_owner(sp);
2170 return status;
2171}
2172
2173static struct inode *
2174nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2175{
2176 struct nfs4_state *state;
2177
2178 /* Protect against concurrent sillydeletes */
2179 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2180 if (IS_ERR(state))
2181 return ERR_CAST(state);
2182 ctx->state = state;
2183 return igrab(state->inode);
2184}
2185
2186static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2187{
2188 if (ctx->state == NULL)
2189 return;
2190 if (is_sync)
2191 nfs4_close_sync(ctx->state, ctx->mode);
2192 else
2193 nfs4_close_state(ctx->state, ctx->mode);
2194}
2195
2196static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2197{
2198 struct nfs4_server_caps_arg args = {
2199 .fhandle = fhandle,
2200 };
2201 struct nfs4_server_caps_res res = {};
2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2204 .rpc_argp = &args,
2205 .rpc_resp = &res,
2206 };
2207 int status;
2208
2209 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2210 if (status == 0) {
2211 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2212 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2213 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2214 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2215 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2216 NFS_CAP_CTIME|NFS_CAP_MTIME);
2217 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2218 server->caps |= NFS_CAP_ACLS;
2219 if (res.has_links != 0)
2220 server->caps |= NFS_CAP_HARDLINKS;
2221 if (res.has_symlinks != 0)
2222 server->caps |= NFS_CAP_SYMLINKS;
2223 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2224 server->caps |= NFS_CAP_FILEID;
2225 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2226 server->caps |= NFS_CAP_MODE;
2227 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2228 server->caps |= NFS_CAP_NLINK;
2229 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2230 server->caps |= NFS_CAP_OWNER;
2231 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2232 server->caps |= NFS_CAP_OWNER_GROUP;
2233 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2234 server->caps |= NFS_CAP_ATIME;
2235 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2236 server->caps |= NFS_CAP_CTIME;
2237 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2238 server->caps |= NFS_CAP_MTIME;
2239
2240 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2241 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2242 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2243 server->acl_bitmask = res.acl_bitmask;
2244 server->fh_expire_type = res.fh_expire_type;
2245 }
2246
2247 return status;
2248}
2249
2250int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2251{
2252 struct nfs4_exception exception = { };
2253 int err;
2254 do {
2255 err = nfs4_handle_exception(server,
2256 _nfs4_server_capabilities(server, fhandle),
2257 &exception);
2258 } while (exception.retry);
2259 return err;
2260}
2261
2262static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2263 struct nfs_fsinfo *info)
2264{
2265 struct nfs4_lookup_root_arg args = {
2266 .bitmask = nfs4_fattr_bitmap,
2267 };
2268 struct nfs4_lookup_res res = {
2269 .server = server,
2270 .fattr = info->fattr,
2271 .fh = fhandle,
2272 };
2273 struct rpc_message msg = {
2274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2275 .rpc_argp = &args,
2276 .rpc_resp = &res,
2277 };
2278
2279 nfs_fattr_init(info->fattr);
2280 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2281}
2282
2283static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2284 struct nfs_fsinfo *info)
2285{
2286 struct nfs4_exception exception = { };
2287 int err;
2288 do {
2289 err = _nfs4_lookup_root(server, fhandle, info);
2290 switch (err) {
2291 case 0:
2292 case -NFS4ERR_WRONGSEC:
2293 break;
2294 default:
2295 err = nfs4_handle_exception(server, err, &exception);
2296 }
2297 } while (exception.retry);
2298 return err;
2299}
2300
2301static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2302 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2303{
2304 struct rpc_auth *auth;
2305 int ret;
2306
2307 auth = rpcauth_create(flavor, server->client);
2308 if (!auth) {
2309 ret = -EIO;
2310 goto out;
2311 }
2312 ret = nfs4_lookup_root(server, fhandle, info);
2313out:
2314 return ret;
2315}
2316
2317static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2318 struct nfs_fsinfo *info)
2319{
2320 int i, len, status = 0;
2321 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2322
2323 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2324 flav_array[len] = RPC_AUTH_NULL;
2325 len += 1;
2326
2327 for (i = 0; i < len; i++) {
2328 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2329 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2330 continue;
2331 break;
2332 }
2333 /*
2334 * -EACCESS could mean that the user doesn't have correct permissions
2335 * to access the mount. It could also mean that we tried to mount
2336 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2337 * existing mount programs don't handle -EACCES very well so it should
2338 * be mapped to -EPERM instead.
2339 */
2340 if (status == -EACCES)
2341 status = -EPERM;
2342 return status;
2343}
2344
2345/*
2346 * get the file handle for the "/" directory on the server
2347 */
2348static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2349 struct nfs_fsinfo *info)
2350{
2351 int minor_version = server->nfs_client->cl_minorversion;
2352 int status = nfs4_lookup_root(server, fhandle, info);
2353 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2354 /*
2355 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2356 * by nfs4_map_errors() as this function exits.
2357 */
2358 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2359 if (status == 0)
2360 status = nfs4_server_capabilities(server, fhandle);
2361 if (status == 0)
2362 status = nfs4_do_fsinfo(server, fhandle, info);
2363 return nfs4_map_errors(status);
2364}
2365
2366/*
2367 * Get locations and (maybe) other attributes of a referral.
2368 * Note that we'll actually follow the referral later when
2369 * we detect fsid mismatch in inode revalidation
2370 */
2371static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2372 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2373{
2374 int status = -ENOMEM;
2375 struct page *page = NULL;
2376 struct nfs4_fs_locations *locations = NULL;
2377
2378 page = alloc_page(GFP_KERNEL);
2379 if (page == NULL)
2380 goto out;
2381 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2382 if (locations == NULL)
2383 goto out;
2384
2385 status = nfs4_proc_fs_locations(dir, name, locations, page);
2386 if (status != 0)
2387 goto out;
2388 /* Make sure server returned a different fsid for the referral */
2389 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2390 dprintk("%s: server did not return a different fsid for"
2391 " a referral at %s\n", __func__, name->name);
2392 status = -EIO;
2393 goto out;
2394 }
2395 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2396 nfs_fixup_referral_attributes(&locations->fattr);
2397
2398 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2399 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2400 memset(fhandle, 0, sizeof(struct nfs_fh));
2401out:
2402 if (page)
2403 __free_page(page);
2404 kfree(locations);
2405 return status;
2406}
2407
2408static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2409{
2410 struct nfs4_getattr_arg args = {
2411 .fh = fhandle,
2412 .bitmask = server->attr_bitmask,
2413 };
2414 struct nfs4_getattr_res res = {
2415 .fattr = fattr,
2416 .server = server,
2417 };
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2420 .rpc_argp = &args,
2421 .rpc_resp = &res,
2422 };
2423
2424 nfs_fattr_init(fattr);
2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2426}
2427
2428static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2429{
2430 struct nfs4_exception exception = { };
2431 int err;
2432 do {
2433 err = nfs4_handle_exception(server,
2434 _nfs4_proc_getattr(server, fhandle, fattr),
2435 &exception);
2436 } while (exception.retry);
2437 return err;
2438}
2439
2440/*
2441 * The file is not closed if it is opened due to the a request to change
2442 * the size of the file. The open call will not be needed once the
2443 * VFS layer lookup-intents are implemented.
2444 *
2445 * Close is called when the inode is destroyed.
2446 * If we haven't opened the file for O_WRONLY, we
2447 * need to in the size_change case to obtain a stateid.
2448 *
2449 * Got race?
2450 * Because OPEN is always done by name in nfsv4, it is
2451 * possible that we opened a different file by the same
2452 * name. We can recognize this race condition, but we
2453 * can't do anything about it besides returning an error.
2454 *
2455 * This will be fixed with VFS changes (lookup-intent).
2456 */
2457static int
2458nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2459 struct iattr *sattr)
2460{
2461 struct inode *inode = dentry->d_inode;
2462 struct rpc_cred *cred = NULL;
2463 struct nfs4_state *state = NULL;
2464 int status;
2465
2466 if (pnfs_ld_layoutret_on_setattr(inode))
2467 pnfs_return_layout(inode);
2468
2469 nfs_fattr_init(fattr);
2470
2471 /* Search for an existing open(O_WRITE) file */
2472 if (sattr->ia_valid & ATTR_FILE) {
2473 struct nfs_open_context *ctx;
2474
2475 ctx = nfs_file_open_context(sattr->ia_file);
2476 if (ctx) {
2477 cred = ctx->cred;
2478 state = ctx->state;
2479 }
2480 }
2481
2482 /* Deal with open(O_TRUNC) */
2483 if (sattr->ia_valid & ATTR_OPEN)
2484 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2485
2486 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2487 if (status == 0)
2488 nfs_setattr_update_inode(inode, sattr);
2489 return status;
2490}
2491
2492static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2493 const struct qstr *name, struct nfs_fh *fhandle,
2494 struct nfs_fattr *fattr)
2495{
2496 struct nfs_server *server = NFS_SERVER(dir);
2497 int status;
2498 struct nfs4_lookup_arg args = {
2499 .bitmask = server->attr_bitmask,
2500 .dir_fh = NFS_FH(dir),
2501 .name = name,
2502 };
2503 struct nfs4_lookup_res res = {
2504 .server = server,
2505 .fattr = fattr,
2506 .fh = fhandle,
2507 };
2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2510 .rpc_argp = &args,
2511 .rpc_resp = &res,
2512 };
2513
2514 nfs_fattr_init(fattr);
2515
2516 dprintk("NFS call lookup %s\n", name->name);
2517 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2518 dprintk("NFS reply lookup: %d\n", status);
2519 return status;
2520}
2521
2522void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2523{
2524 memset(fh, 0, sizeof(struct nfs_fh));
2525 fattr->fsid.major = 1;
2526 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2527 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2528 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2529 fattr->nlink = 2;
2530}
2531
2532static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2533 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2534{
2535 struct nfs4_exception exception = { };
2536 int err;
2537 do {
2538 int status;
2539
2540 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2541 switch (status) {
2542 case -NFS4ERR_BADNAME:
2543 return -ENOENT;
2544 case -NFS4ERR_MOVED:
2545 return nfs4_get_referral(dir, name, fattr, fhandle);
2546 case -NFS4ERR_WRONGSEC:
2547 nfs_fixup_secinfo_attributes(fattr, fhandle);
2548 }
2549 err = nfs4_handle_exception(NFS_SERVER(dir),
2550 status, &exception);
2551 } while (exception.retry);
2552 return err;
2553}
2554
2555static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2556{
2557 struct nfs_server *server = NFS_SERVER(inode);
2558 struct nfs4_accessargs args = {
2559 .fh = NFS_FH(inode),
2560 .bitmask = server->cache_consistency_bitmask,
2561 };
2562 struct nfs4_accessres res = {
2563 .server = server,
2564 };
2565 struct rpc_message msg = {
2566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2567 .rpc_argp = &args,
2568 .rpc_resp = &res,
2569 .rpc_cred = entry->cred,
2570 };
2571 int mode = entry->mask;
2572 int status;
2573
2574 /*
2575 * Determine which access bits we want to ask for...
2576 */
2577 if (mode & MAY_READ)
2578 args.access |= NFS4_ACCESS_READ;
2579 if (S_ISDIR(inode->i_mode)) {
2580 if (mode & MAY_WRITE)
2581 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2582 if (mode & MAY_EXEC)
2583 args.access |= NFS4_ACCESS_LOOKUP;
2584 } else {
2585 if (mode & MAY_WRITE)
2586 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2587 if (mode & MAY_EXEC)
2588 args.access |= NFS4_ACCESS_EXECUTE;
2589 }
2590
2591 res.fattr = nfs_alloc_fattr();
2592 if (res.fattr == NULL)
2593 return -ENOMEM;
2594
2595 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2596 if (!status) {
2597 entry->mask = 0;
2598 if (res.access & NFS4_ACCESS_READ)
2599 entry->mask |= MAY_READ;
2600 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2601 entry->mask |= MAY_WRITE;
2602 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2603 entry->mask |= MAY_EXEC;
2604 nfs_refresh_inode(inode, res.fattr);
2605 }
2606 nfs_free_fattr(res.fattr);
2607 return status;
2608}
2609
2610static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2611{
2612 struct nfs4_exception exception = { };
2613 int err;
2614 do {
2615 err = nfs4_handle_exception(NFS_SERVER(inode),
2616 _nfs4_proc_access(inode, entry),
2617 &exception);
2618 } while (exception.retry);
2619 return err;
2620}
2621
2622/*
2623 * TODO: For the time being, we don't try to get any attributes
2624 * along with any of the zero-copy operations READ, READDIR,
2625 * READLINK, WRITE.
2626 *
2627 * In the case of the first three, we want to put the GETATTR
2628 * after the read-type operation -- this is because it is hard
2629 * to predict the length of a GETATTR response in v4, and thus
2630 * align the READ data correctly. This means that the GETATTR
2631 * may end up partially falling into the page cache, and we should
2632 * shift it into the 'tail' of the xdr_buf before processing.
2633 * To do this efficiently, we need to know the total length
2634 * of data received, which doesn't seem to be available outside
2635 * of the RPC layer.
2636 *
2637 * In the case of WRITE, we also want to put the GETATTR after
2638 * the operation -- in this case because we want to make sure
2639 * we get the post-operation mtime and size. This means that
2640 * we can't use xdr_encode_pages() as written: we need a variant
2641 * of it which would leave room in the 'tail' iovec.
2642 *
2643 * Both of these changes to the XDR layer would in fact be quite
2644 * minor, but I decided to leave them for a subsequent patch.
2645 */
2646static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2647 unsigned int pgbase, unsigned int pglen)
2648{
2649 struct nfs4_readlink args = {
2650 .fh = NFS_FH(inode),
2651 .pgbase = pgbase,
2652 .pglen = pglen,
2653 .pages = &page,
2654 };
2655 struct nfs4_readlink_res res;
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2658 .rpc_argp = &args,
2659 .rpc_resp = &res,
2660 };
2661
2662 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2663}
2664
2665static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2666 unsigned int pgbase, unsigned int pglen)
2667{
2668 struct nfs4_exception exception = { };
2669 int err;
2670 do {
2671 err = nfs4_handle_exception(NFS_SERVER(inode),
2672 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2673 &exception);
2674 } while (exception.retry);
2675 return err;
2676}
2677
2678/*
2679 * Got race?
2680 * We will need to arrange for the VFS layer to provide an atomic open.
2681 * Until then, this create/open method is prone to inefficiency and race
2682 * conditions due to the lookup, create, and open VFS calls from sys_open()
2683 * placed on the wire.
2684 *
2685 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2686 * The file will be opened again in the subsequent VFS open call
2687 * (nfs4_proc_file_open).
2688 *
2689 * The open for read will just hang around to be used by any process that
2690 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2691 */
2692
2693static int
2694nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2695 int flags, struct nfs_open_context *ctx)
2696{
2697 struct dentry *de = dentry;
2698 struct nfs4_state *state;
2699 struct rpc_cred *cred = NULL;
2700 fmode_t fmode = 0;
2701 int status = 0;
2702
2703 if (ctx != NULL) {
2704 cred = ctx->cred;
2705 de = ctx->dentry;
2706 fmode = ctx->mode;
2707 }
2708 sattr->ia_mode &= ~current_umask();
2709 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2710 d_drop(dentry);
2711 if (IS_ERR(state)) {
2712 status = PTR_ERR(state);
2713 goto out;
2714 }
2715 d_add(dentry, igrab(state->inode));
2716 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2717 if (ctx != NULL)
2718 ctx->state = state;
2719 else
2720 nfs4_close_sync(state, fmode);
2721out:
2722 return status;
2723}
2724
2725static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2726{
2727 struct nfs_server *server = NFS_SERVER(dir);
2728 struct nfs_removeargs args = {
2729 .fh = NFS_FH(dir),
2730 .name.len = name->len,
2731 .name.name = name->name,
2732 .bitmask = server->attr_bitmask,
2733 };
2734 struct nfs_removeres res = {
2735 .server = server,
2736 };
2737 struct rpc_message msg = {
2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2739 .rpc_argp = &args,
2740 .rpc_resp = &res,
2741 };
2742 int status = -ENOMEM;
2743
2744 res.dir_attr = nfs_alloc_fattr();
2745 if (res.dir_attr == NULL)
2746 goto out;
2747
2748 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2749 if (status == 0) {
2750 update_changeattr(dir, &res.cinfo);
2751 nfs_post_op_update_inode(dir, res.dir_attr);
2752 }
2753 nfs_free_fattr(res.dir_attr);
2754out:
2755 return status;
2756}
2757
2758static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2759{
2760 struct nfs4_exception exception = { };
2761 int err;
2762 do {
2763 err = nfs4_handle_exception(NFS_SERVER(dir),
2764 _nfs4_proc_remove(dir, name),
2765 &exception);
2766 } while (exception.retry);
2767 return err;
2768}
2769
2770static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2771{
2772 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs_removeargs *args = msg->rpc_argp;
2774 struct nfs_removeres *res = msg->rpc_resp;
2775
2776 args->bitmask = server->cache_consistency_bitmask;
2777 res->server = server;
2778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2779 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2780}
2781
2782static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2783{
2784 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2785
2786 if (!nfs4_sequence_done(task, &res->seq_res))
2787 return 0;
2788 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2789 return 0;
2790 update_changeattr(dir, &res->cinfo);
2791 nfs_post_op_update_inode(dir, res->dir_attr);
2792 return 1;
2793}
2794
2795static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2796{
2797 struct nfs_server *server = NFS_SERVER(dir);
2798 struct nfs_renameargs *arg = msg->rpc_argp;
2799 struct nfs_renameres *res = msg->rpc_resp;
2800
2801 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2802 arg->bitmask = server->attr_bitmask;
2803 res->server = server;
2804 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2805}
2806
2807static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2808 struct inode *new_dir)
2809{
2810 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2811
2812 if (!nfs4_sequence_done(task, &res->seq_res))
2813 return 0;
2814 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2815 return 0;
2816
2817 update_changeattr(old_dir, &res->old_cinfo);
2818 nfs_post_op_update_inode(old_dir, res->old_fattr);
2819 update_changeattr(new_dir, &res->new_cinfo);
2820 nfs_post_op_update_inode(new_dir, res->new_fattr);
2821 return 1;
2822}
2823
2824static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2825 struct inode *new_dir, struct qstr *new_name)
2826{
2827 struct nfs_server *server = NFS_SERVER(old_dir);
2828 struct nfs_renameargs arg = {
2829 .old_dir = NFS_FH(old_dir),
2830 .new_dir = NFS_FH(new_dir),
2831 .old_name = old_name,
2832 .new_name = new_name,
2833 .bitmask = server->attr_bitmask,
2834 };
2835 struct nfs_renameres res = {
2836 .server = server,
2837 };
2838 struct rpc_message msg = {
2839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2840 .rpc_argp = &arg,
2841 .rpc_resp = &res,
2842 };
2843 int status = -ENOMEM;
2844
2845 res.old_fattr = nfs_alloc_fattr();
2846 res.new_fattr = nfs_alloc_fattr();
2847 if (res.old_fattr == NULL || res.new_fattr == NULL)
2848 goto out;
2849
2850 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2851 if (!status) {
2852 update_changeattr(old_dir, &res.old_cinfo);
2853 nfs_post_op_update_inode(old_dir, res.old_fattr);
2854 update_changeattr(new_dir, &res.new_cinfo);
2855 nfs_post_op_update_inode(new_dir, res.new_fattr);
2856 }
2857out:
2858 nfs_free_fattr(res.new_fattr);
2859 nfs_free_fattr(res.old_fattr);
2860 return status;
2861}
2862
2863static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2864 struct inode *new_dir, struct qstr *new_name)
2865{
2866 struct nfs4_exception exception = { };
2867 int err;
2868 do {
2869 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2870 _nfs4_proc_rename(old_dir, old_name,
2871 new_dir, new_name),
2872 &exception);
2873 } while (exception.retry);
2874 return err;
2875}
2876
2877static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2878{
2879 struct nfs_server *server = NFS_SERVER(inode);
2880 struct nfs4_link_arg arg = {
2881 .fh = NFS_FH(inode),
2882 .dir_fh = NFS_FH(dir),
2883 .name = name,
2884 .bitmask = server->attr_bitmask,
2885 };
2886 struct nfs4_link_res res = {
2887 .server = server,
2888 };
2889 struct rpc_message msg = {
2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2891 .rpc_argp = &arg,
2892 .rpc_resp = &res,
2893 };
2894 int status = -ENOMEM;
2895
2896 res.fattr = nfs_alloc_fattr();
2897 res.dir_attr = nfs_alloc_fattr();
2898 if (res.fattr == NULL || res.dir_attr == NULL)
2899 goto out;
2900
2901 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2902 if (!status) {
2903 update_changeattr(dir, &res.cinfo);
2904 nfs_post_op_update_inode(dir, res.dir_attr);
2905 nfs_post_op_update_inode(inode, res.fattr);
2906 }
2907out:
2908 nfs_free_fattr(res.dir_attr);
2909 nfs_free_fattr(res.fattr);
2910 return status;
2911}
2912
2913static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2914{
2915 struct nfs4_exception exception = { };
2916 int err;
2917 do {
2918 err = nfs4_handle_exception(NFS_SERVER(inode),
2919 _nfs4_proc_link(inode, dir, name),
2920 &exception);
2921 } while (exception.retry);
2922 return err;
2923}
2924
2925struct nfs4_createdata {
2926 struct rpc_message msg;
2927 struct nfs4_create_arg arg;
2928 struct nfs4_create_res res;
2929 struct nfs_fh fh;
2930 struct nfs_fattr fattr;
2931 struct nfs_fattr dir_fattr;
2932};
2933
2934static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2935 struct qstr *name, struct iattr *sattr, u32 ftype)
2936{
2937 struct nfs4_createdata *data;
2938
2939 data = kzalloc(sizeof(*data), GFP_KERNEL);
2940 if (data != NULL) {
2941 struct nfs_server *server = NFS_SERVER(dir);
2942
2943 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2944 data->msg.rpc_argp = &data->arg;
2945 data->msg.rpc_resp = &data->res;
2946 data->arg.dir_fh = NFS_FH(dir);
2947 data->arg.server = server;
2948 data->arg.name = name;
2949 data->arg.attrs = sattr;
2950 data->arg.ftype = ftype;
2951 data->arg.bitmask = server->attr_bitmask;
2952 data->res.server = server;
2953 data->res.fh = &data->fh;
2954 data->res.fattr = &data->fattr;
2955 data->res.dir_fattr = &data->dir_fattr;
2956 nfs_fattr_init(data->res.fattr);
2957 nfs_fattr_init(data->res.dir_fattr);
2958 }
2959 return data;
2960}
2961
2962static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2963{
2964 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2965 &data->arg.seq_args, &data->res.seq_res, 1);
2966 if (status == 0) {
2967 update_changeattr(dir, &data->res.dir_cinfo);
2968 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2969 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2970 }
2971 return status;
2972}
2973
2974static void nfs4_free_createdata(struct nfs4_createdata *data)
2975{
2976 kfree(data);
2977}
2978
2979static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2980 struct page *page, unsigned int len, struct iattr *sattr)
2981{
2982 struct nfs4_createdata *data;
2983 int status = -ENAMETOOLONG;
2984
2985 if (len > NFS4_MAXPATHLEN)
2986 goto out;
2987
2988 status = -ENOMEM;
2989 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2990 if (data == NULL)
2991 goto out;
2992
2993 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2994 data->arg.u.symlink.pages = &page;
2995 data->arg.u.symlink.len = len;
2996
2997 status = nfs4_do_create(dir, dentry, data);
2998
2999 nfs4_free_createdata(data);
3000out:
3001 return status;
3002}
3003
3004static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3005 struct page *page, unsigned int len, struct iattr *sattr)
3006{
3007 struct nfs4_exception exception = { };
3008 int err;
3009 do {
3010 err = nfs4_handle_exception(NFS_SERVER(dir),
3011 _nfs4_proc_symlink(dir, dentry, page,
3012 len, sattr),
3013 &exception);
3014 } while (exception.retry);
3015 return err;
3016}
3017
3018static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3019 struct iattr *sattr)
3020{
3021 struct nfs4_createdata *data;
3022 int status = -ENOMEM;
3023
3024 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3025 if (data == NULL)
3026 goto out;
3027
3028 status = nfs4_do_create(dir, dentry, data);
3029
3030 nfs4_free_createdata(data);
3031out:
3032 return status;
3033}
3034
3035static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3036 struct iattr *sattr)
3037{
3038 struct nfs4_exception exception = { };
3039 int err;
3040
3041 sattr->ia_mode &= ~current_umask();
3042 do {
3043 err = nfs4_handle_exception(NFS_SERVER(dir),
3044 _nfs4_proc_mkdir(dir, dentry, sattr),
3045 &exception);
3046 } while (exception.retry);
3047 return err;
3048}
3049
3050static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3051 u64 cookie, struct page **pages, unsigned int count, int plus)
3052{
3053 struct inode *dir = dentry->d_inode;
3054 struct nfs4_readdir_arg args = {
3055 .fh = NFS_FH(dir),
3056 .pages = pages,
3057 .pgbase = 0,
3058 .count = count,
3059 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3060 .plus = plus,
3061 };
3062 struct nfs4_readdir_res res;
3063 struct rpc_message msg = {
3064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3065 .rpc_argp = &args,
3066 .rpc_resp = &res,
3067 .rpc_cred = cred,
3068 };
3069 int status;
3070
3071 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3072 dentry->d_parent->d_name.name,
3073 dentry->d_name.name,
3074 (unsigned long long)cookie);
3075 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3076 res.pgbase = args.pgbase;
3077 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3078 if (status >= 0) {
3079 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3080 status += args.pgbase;
3081 }
3082
3083 nfs_invalidate_atime(dir);
3084
3085 dprintk("%s: returns %d\n", __func__, status);
3086 return status;
3087}
3088
3089static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3090 u64 cookie, struct page **pages, unsigned int count, int plus)
3091{
3092 struct nfs4_exception exception = { };
3093 int err;
3094 do {
3095 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3096 _nfs4_proc_readdir(dentry, cred, cookie,
3097 pages, count, plus),
3098 &exception);
3099 } while (exception.retry);
3100 return err;
3101}
3102
3103static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3104 struct iattr *sattr, dev_t rdev)
3105{
3106 struct nfs4_createdata *data;
3107 int mode = sattr->ia_mode;
3108 int status = -ENOMEM;
3109
3110 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3111 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3112
3113 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3114 if (data == NULL)
3115 goto out;
3116
3117 if (S_ISFIFO(mode))
3118 data->arg.ftype = NF4FIFO;
3119 else if (S_ISBLK(mode)) {
3120 data->arg.ftype = NF4BLK;
3121 data->arg.u.device.specdata1 = MAJOR(rdev);
3122 data->arg.u.device.specdata2 = MINOR(rdev);
3123 }
3124 else if (S_ISCHR(mode)) {
3125 data->arg.ftype = NF4CHR;
3126 data->arg.u.device.specdata1 = MAJOR(rdev);
3127 data->arg.u.device.specdata2 = MINOR(rdev);
3128 }
3129
3130 status = nfs4_do_create(dir, dentry, data);
3131
3132 nfs4_free_createdata(data);
3133out:
3134 return status;
3135}
3136
3137static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3138 struct iattr *sattr, dev_t rdev)
3139{
3140 struct nfs4_exception exception = { };
3141 int err;
3142
3143 sattr->ia_mode &= ~current_umask();
3144 do {
3145 err = nfs4_handle_exception(NFS_SERVER(dir),
3146 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3147 &exception);
3148 } while (exception.retry);
3149 return err;
3150}
3151
3152static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3153 struct nfs_fsstat *fsstat)
3154{
3155 struct nfs4_statfs_arg args = {
3156 .fh = fhandle,
3157 .bitmask = server->attr_bitmask,
3158 };
3159 struct nfs4_statfs_res res = {
3160 .fsstat = fsstat,
3161 };
3162 struct rpc_message msg = {
3163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3164 .rpc_argp = &args,
3165 .rpc_resp = &res,
3166 };
3167
3168 nfs_fattr_init(fsstat->fattr);
3169 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3170}
3171
3172static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3173{
3174 struct nfs4_exception exception = { };
3175 int err;
3176 do {
3177 err = nfs4_handle_exception(server,
3178 _nfs4_proc_statfs(server, fhandle, fsstat),
3179 &exception);
3180 } while (exception.retry);
3181 return err;
3182}
3183
3184static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3185 struct nfs_fsinfo *fsinfo)
3186{
3187 struct nfs4_fsinfo_arg args = {
3188 .fh = fhandle,
3189 .bitmask = server->attr_bitmask,
3190 };
3191 struct nfs4_fsinfo_res res = {
3192 .fsinfo = fsinfo,
3193 };
3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3196 .rpc_argp = &args,
3197 .rpc_resp = &res,
3198 };
3199
3200 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3201}
3202
3203static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3204{
3205 struct nfs4_exception exception = { };
3206 int err;
3207
3208 do {
3209 err = nfs4_handle_exception(server,
3210 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3211 &exception);
3212 } while (exception.retry);
3213 return err;
3214}
3215
3216static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3217{
3218 nfs_fattr_init(fsinfo->fattr);
3219 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3220}
3221
3222static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3223 struct nfs_pathconf *pathconf)
3224{
3225 struct nfs4_pathconf_arg args = {
3226 .fh = fhandle,
3227 .bitmask = server->attr_bitmask,
3228 };
3229 struct nfs4_pathconf_res res = {
3230 .pathconf = pathconf,
3231 };
3232 struct rpc_message msg = {
3233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3234 .rpc_argp = &args,
3235 .rpc_resp = &res,
3236 };
3237
3238 /* None of the pathconf attributes are mandatory to implement */
3239 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3240 memset(pathconf, 0, sizeof(*pathconf));
3241 return 0;
3242 }
3243
3244 nfs_fattr_init(pathconf->fattr);
3245 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3246}
3247
3248static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3249 struct nfs_pathconf *pathconf)
3250{
3251 struct nfs4_exception exception = { };
3252 int err;
3253
3254 do {
3255 err = nfs4_handle_exception(server,
3256 _nfs4_proc_pathconf(server, fhandle, pathconf),
3257 &exception);
3258 } while (exception.retry);
3259 return err;
3260}
3261
3262void __nfs4_read_done_cb(struct nfs_read_data *data)
3263{
3264 nfs_invalidate_atime(data->inode);
3265}
3266
3267static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3268{
3269 struct nfs_server *server = NFS_SERVER(data->inode);
3270
3271 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3272 rpc_restart_call_prepare(task);
3273 return -EAGAIN;
3274 }
3275
3276 __nfs4_read_done_cb(data);
3277 if (task->tk_status > 0)
3278 renew_lease(server, data->timestamp);
3279 return 0;
3280}
3281
3282static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3283{
3284
3285 dprintk("--> %s\n", __func__);
3286
3287 if (!nfs4_sequence_done(task, &data->res.seq_res))
3288 return -EAGAIN;
3289
3290 return data->read_done_cb ? data->read_done_cb(task, data) :
3291 nfs4_read_done_cb(task, data);
3292}
3293
3294static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3295{
3296 data->timestamp = jiffies;
3297 data->read_done_cb = nfs4_read_done_cb;
3298 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3299 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3300}
3301
3302/* Reset the the nfs_read_data to send the read to the MDS. */
3303void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3304{
3305 dprintk("%s Reset task for i/o through\n", __func__);
3306 put_lseg(data->lseg);
3307 data->lseg = NULL;
3308 /* offsets will differ in the dense stripe case */
3309 data->args.offset = data->mds_offset;
3310 data->ds_clp = NULL;
3311 data->args.fh = NFS_FH(data->inode);
3312 data->read_done_cb = nfs4_read_done_cb;
3313 task->tk_ops = data->mds_ops;
3314 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3315}
3316EXPORT_SYMBOL_GPL(nfs4_reset_read);
3317
3318static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3319{
3320 struct inode *inode = data->inode;
3321
3322 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3323 rpc_restart_call_prepare(task);
3324 return -EAGAIN;
3325 }
3326 if (task->tk_status >= 0) {
3327 renew_lease(NFS_SERVER(inode), data->timestamp);
3328 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3329 }
3330 return 0;
3331}
3332
3333static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3334{
3335 if (!nfs4_sequence_done(task, &data->res.seq_res))
3336 return -EAGAIN;
3337 return data->write_done_cb ? data->write_done_cb(task, data) :
3338 nfs4_write_done_cb(task, data);
3339}
3340
3341/* Reset the the nfs_write_data to send the write to the MDS. */
3342void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3343{
3344 dprintk("%s Reset task for i/o through\n", __func__);
3345 put_lseg(data->lseg);
3346 data->lseg = NULL;
3347 data->ds_clp = NULL;
3348 data->write_done_cb = nfs4_write_done_cb;
3349 data->args.fh = NFS_FH(data->inode);
3350 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3351 data->args.offset = data->mds_offset;
3352 data->res.fattr = &data->fattr;
3353 task->tk_ops = data->mds_ops;
3354 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3355}
3356EXPORT_SYMBOL_GPL(nfs4_reset_write);
3357
3358static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3359{
3360 struct nfs_server *server = NFS_SERVER(data->inode);
3361
3362 if (data->lseg) {
3363 data->args.bitmask = NULL;
3364 data->res.fattr = NULL;
3365 } else
3366 data->args.bitmask = server->cache_consistency_bitmask;
3367 if (!data->write_done_cb)
3368 data->write_done_cb = nfs4_write_done_cb;
3369 data->res.server = server;
3370 data->timestamp = jiffies;
3371
3372 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3373 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3374}
3375
3376static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3377{
3378 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3379 &data->args.seq_args,
3380 &data->res.seq_res,
3381 task))
3382 return;
3383 rpc_call_start(task);
3384}
3385
3386static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3387{
3388 struct inode *inode = data->inode;
3389
3390 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3391 rpc_restart_call_prepare(task);
3392 return -EAGAIN;
3393 }
3394 nfs_refresh_inode(inode, data->res.fattr);
3395 return 0;
3396}
3397
3398static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3399{
3400 if (!nfs4_sequence_done(task, &data->res.seq_res))
3401 return -EAGAIN;
3402 return data->write_done_cb(task, data);
3403}
3404
3405static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3406{
3407 struct nfs_server *server = NFS_SERVER(data->inode);
3408
3409 if (data->lseg) {
3410 data->args.bitmask = NULL;
3411 data->res.fattr = NULL;
3412 } else
3413 data->args.bitmask = server->cache_consistency_bitmask;
3414 if (!data->write_done_cb)
3415 data->write_done_cb = nfs4_commit_done_cb;
3416 data->res.server = server;
3417 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3418 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3419}
3420
3421struct nfs4_renewdata {
3422 struct nfs_client *client;
3423 unsigned long timestamp;
3424};
3425
3426/*
3427 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3428 * standalone procedure for queueing an asynchronous RENEW.
3429 */
3430static void nfs4_renew_release(void *calldata)
3431{
3432 struct nfs4_renewdata *data = calldata;
3433 struct nfs_client *clp = data->client;
3434
3435 if (atomic_read(&clp->cl_count) > 1)
3436 nfs4_schedule_state_renewal(clp);
3437 nfs_put_client(clp);
3438 kfree(data);
3439}
3440
3441static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3442{
3443 struct nfs4_renewdata *data = calldata;
3444 struct nfs_client *clp = data->client;
3445 unsigned long timestamp = data->timestamp;
3446
3447 if (task->tk_status < 0) {
3448 /* Unless we're shutting down, schedule state recovery! */
3449 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3450 return;
3451 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3452 nfs4_schedule_lease_recovery(clp);
3453 return;
3454 }
3455 nfs4_schedule_path_down_recovery(clp);
3456 }
3457 do_renew_lease(clp, timestamp);
3458}
3459
3460static const struct rpc_call_ops nfs4_renew_ops = {
3461 .rpc_call_done = nfs4_renew_done,
3462 .rpc_release = nfs4_renew_release,
3463};
3464
3465static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3466{
3467 struct rpc_message msg = {
3468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3469 .rpc_argp = clp,
3470 .rpc_cred = cred,
3471 };
3472 struct nfs4_renewdata *data;
3473
3474 if (renew_flags == 0)
3475 return 0;
3476 if (!atomic_inc_not_zero(&clp->cl_count))
3477 return -EIO;
3478 data = kmalloc(sizeof(*data), GFP_NOFS);
3479 if (data == NULL)
3480 return -ENOMEM;
3481 data->client = clp;
3482 data->timestamp = jiffies;
3483 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3484 &nfs4_renew_ops, data);
3485}
3486
3487static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3488{
3489 struct rpc_message msg = {
3490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3491 .rpc_argp = clp,
3492 .rpc_cred = cred,
3493 };
3494 unsigned long now = jiffies;
3495 int status;
3496
3497 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3498 if (status < 0)
3499 return status;
3500 do_renew_lease(clp, now);
3501 return 0;
3502}
3503
3504static inline int nfs4_server_supports_acls(struct nfs_server *server)
3505{
3506 return (server->caps & NFS_CAP_ACLS)
3507 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3508 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3509}
3510
3511/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3512 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3513 * the stack.
3514 */
3515#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3516
3517static int buf_to_pages_noslab(const void *buf, size_t buflen,
3518 struct page **pages, unsigned int *pgbase)
3519{
3520 struct page *newpage, **spages;
3521 int rc = 0;
3522 size_t len;
3523 spages = pages;
3524
3525 do {
3526 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3527 newpage = alloc_page(GFP_KERNEL);
3528
3529 if (newpage == NULL)
3530 goto unwind;
3531 memcpy(page_address(newpage), buf, len);
3532 buf += len;
3533 buflen -= len;
3534 *pages++ = newpage;
3535 rc++;
3536 } while (buflen != 0);
3537
3538 return rc;
3539
3540unwind:
3541 for(; rc > 0; rc--)
3542 __free_page(spages[rc-1]);
3543 return -ENOMEM;
3544}
3545
3546struct nfs4_cached_acl {
3547 int cached;
3548 size_t len;
3549 char data[0];
3550};
3551
3552static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3553{
3554 struct nfs_inode *nfsi = NFS_I(inode);
3555
3556 spin_lock(&inode->i_lock);
3557 kfree(nfsi->nfs4_acl);
3558 nfsi->nfs4_acl = acl;
3559 spin_unlock(&inode->i_lock);
3560}
3561
3562static void nfs4_zap_acl_attr(struct inode *inode)
3563{
3564 nfs4_set_cached_acl(inode, NULL);
3565}
3566
3567static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3568{
3569 struct nfs_inode *nfsi = NFS_I(inode);
3570 struct nfs4_cached_acl *acl;
3571 int ret = -ENOENT;
3572
3573 spin_lock(&inode->i_lock);
3574 acl = nfsi->nfs4_acl;
3575 if (acl == NULL)
3576 goto out;
3577 if (buf == NULL) /* user is just asking for length */
3578 goto out_len;
3579 if (acl->cached == 0)
3580 goto out;
3581 ret = -ERANGE; /* see getxattr(2) man page */
3582 if (acl->len > buflen)
3583 goto out;
3584 memcpy(buf, acl->data, acl->len);
3585out_len:
3586 ret = acl->len;
3587out:
3588 spin_unlock(&inode->i_lock);
3589 return ret;
3590}
3591
3592static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3593{
3594 struct nfs4_cached_acl *acl;
3595
3596 if (buf && acl_len <= PAGE_SIZE) {
3597 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3598 if (acl == NULL)
3599 goto out;
3600 acl->cached = 1;
3601 memcpy(acl->data, buf, acl_len);
3602 } else {
3603 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3604 if (acl == NULL)
3605 goto out;
3606 acl->cached = 0;
3607 }
3608 acl->len = acl_len;
3609out:
3610 nfs4_set_cached_acl(inode, acl);
3611}
3612
3613/*
3614 * The getxattr API returns the required buffer length when called with a
3615 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3616 * the required buf. On a NULL buf, we send a page of data to the server
3617 * guessing that the ACL request can be serviced by a page. If so, we cache
3618 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3619 * the cache. If not so, we throw away the page, and cache the required
3620 * length. The next getxattr call will then produce another round trip to
3621 * the server, this time with the input buf of the required size.
3622 */
3623static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3624{
3625 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3626 struct nfs_getaclargs args = {
3627 .fh = NFS_FH(inode),
3628 .acl_pages = pages,
3629 .acl_len = buflen,
3630 };
3631 struct nfs_getaclres res = {
3632 .acl_len = buflen,
3633 };
3634 void *resp_buf;
3635 struct rpc_message msg = {
3636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3637 .rpc_argp = &args,
3638 .rpc_resp = &res,
3639 };
3640 int ret = -ENOMEM, npages, i, acl_len = 0;
3641
3642 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3643 /* As long as we're doing a round trip to the server anyway,
3644 * let's be prepared for a page of acl data. */
3645 if (npages == 0)
3646 npages = 1;
3647
3648 for (i = 0; i < npages; i++) {
3649 pages[i] = alloc_page(GFP_KERNEL);
3650 if (!pages[i])
3651 goto out_free;
3652 }
3653 if (npages > 1) {
3654 /* for decoding across pages */
3655 res.acl_scratch = alloc_page(GFP_KERNEL);
3656 if (!res.acl_scratch)
3657 goto out_free;
3658 }
3659 args.acl_len = npages * PAGE_SIZE;
3660 args.acl_pgbase = 0;
3661 /* Let decode_getfacl know not to fail if the ACL data is larger than
3662 * the page we send as a guess */
3663 if (buf == NULL)
3664 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3665 resp_buf = page_address(pages[0]);
3666
3667 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3668 __func__, buf, buflen, npages, args.acl_len);
3669 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3670 &msg, &args.seq_args, &res.seq_res, 0);
3671 if (ret)
3672 goto out_free;
3673
3674 acl_len = res.acl_len - res.acl_data_offset;
3675 if (acl_len > args.acl_len)
3676 nfs4_write_cached_acl(inode, NULL, acl_len);
3677 else
3678 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3679 acl_len);
3680 if (buf) {
3681 ret = -ERANGE;
3682 if (acl_len > buflen)
3683 goto out_free;
3684 _copy_from_pages(buf, pages, res.acl_data_offset,
3685 res.acl_len);
3686 }
3687 ret = acl_len;
3688out_free:
3689 for (i = 0; i < npages; i++)
3690 if (pages[i])
3691 __free_page(pages[i]);
3692 if (res.acl_scratch)
3693 __free_page(res.acl_scratch);
3694 return ret;
3695}
3696
3697static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3698{
3699 struct nfs4_exception exception = { };
3700 ssize_t ret;
3701 do {
3702 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3703 if (ret >= 0)
3704 break;
3705 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3706 } while (exception.retry);
3707 return ret;
3708}
3709
3710static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3711{
3712 struct nfs_server *server = NFS_SERVER(inode);
3713 int ret;
3714
3715 if (!nfs4_server_supports_acls(server))
3716 return -EOPNOTSUPP;
3717 ret = nfs_revalidate_inode(server, inode);
3718 if (ret < 0)
3719 return ret;
3720 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3721 nfs_zap_acl_cache(inode);
3722 ret = nfs4_read_cached_acl(inode, buf, buflen);
3723 if (ret != -ENOENT)
3724 /* -ENOENT is returned if there is no ACL or if there is an ACL
3725 * but no cached acl data, just the acl length */
3726 return ret;
3727 return nfs4_get_acl_uncached(inode, buf, buflen);
3728}
3729
3730static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3731{
3732 struct nfs_server *server = NFS_SERVER(inode);
3733 struct page *pages[NFS4ACL_MAXPAGES];
3734 struct nfs_setaclargs arg = {
3735 .fh = NFS_FH(inode),
3736 .acl_pages = pages,
3737 .acl_len = buflen,
3738 };
3739 struct nfs_setaclres res;
3740 struct rpc_message msg = {
3741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3742 .rpc_argp = &arg,
3743 .rpc_resp = &res,
3744 };
3745 int ret, i;
3746
3747 if (!nfs4_server_supports_acls(server))
3748 return -EOPNOTSUPP;
3749 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3750 if (i < 0)
3751 return i;
3752 nfs_inode_return_delegation(inode);
3753 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3754
3755 /*
3756 * Free each page after tx, so the only ref left is
3757 * held by the network stack
3758 */
3759 for (; i > 0; i--)
3760 put_page(pages[i-1]);
3761
3762 /*
3763 * Acl update can result in inode attribute update.
3764 * so mark the attribute cache invalid.
3765 */
3766 spin_lock(&inode->i_lock);
3767 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3768 spin_unlock(&inode->i_lock);
3769 nfs_access_zap_cache(inode);
3770 nfs_zap_acl_cache(inode);
3771 return ret;
3772}
3773
3774static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3775{
3776 struct nfs4_exception exception = { };
3777 int err;
3778 do {
3779 err = nfs4_handle_exception(NFS_SERVER(inode),
3780 __nfs4_proc_set_acl(inode, buf, buflen),
3781 &exception);
3782 } while (exception.retry);
3783 return err;
3784}
3785
3786static int
3787nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3788{
3789 struct nfs_client *clp = server->nfs_client;
3790
3791 if (task->tk_status >= 0)
3792 return 0;
3793 switch(task->tk_status) {
3794 case -NFS4ERR_DELEG_REVOKED:
3795 case -NFS4ERR_ADMIN_REVOKED:
3796 case -NFS4ERR_BAD_STATEID:
3797 if (state != NULL)
3798 nfs_remove_bad_delegation(state->inode);
3799 case -NFS4ERR_OPENMODE:
3800 if (state == NULL)
3801 break;
3802 nfs4_schedule_stateid_recovery(server, state);
3803 goto wait_on_recovery;
3804 case -NFS4ERR_EXPIRED:
3805 if (state != NULL)
3806 nfs4_schedule_stateid_recovery(server, state);
3807 case -NFS4ERR_STALE_STATEID:
3808 case -NFS4ERR_STALE_CLIENTID:
3809 nfs4_schedule_lease_recovery(clp);
3810 goto wait_on_recovery;
3811#if defined(CONFIG_NFS_V4_1)
3812 case -NFS4ERR_BADSESSION:
3813 case -NFS4ERR_BADSLOT:
3814 case -NFS4ERR_BAD_HIGH_SLOT:
3815 case -NFS4ERR_DEADSESSION:
3816 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3817 case -NFS4ERR_SEQ_FALSE_RETRY:
3818 case -NFS4ERR_SEQ_MISORDERED:
3819 dprintk("%s ERROR %d, Reset session\n", __func__,
3820 task->tk_status);
3821 nfs4_schedule_session_recovery(clp->cl_session);
3822 task->tk_status = 0;
3823 return -EAGAIN;
3824#endif /* CONFIG_NFS_V4_1 */
3825 case -NFS4ERR_DELAY:
3826 nfs_inc_server_stats(server, NFSIOS_DELAY);
3827 case -NFS4ERR_GRACE:
3828 case -EKEYEXPIRED:
3829 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3830 task->tk_status = 0;
3831 return -EAGAIN;
3832 case -NFS4ERR_RETRY_UNCACHED_REP:
3833 case -NFS4ERR_OLD_STATEID:
3834 task->tk_status = 0;
3835 return -EAGAIN;
3836 }
3837 task->tk_status = nfs4_map_errors(task->tk_status);
3838 return 0;
3839wait_on_recovery:
3840 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3841 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3842 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3843 task->tk_status = 0;
3844 return -EAGAIN;
3845}
3846
3847static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3848 nfs4_verifier *bootverf)
3849{
3850 __be32 verf[2];
3851
3852 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3853 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3854 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3855}
3856
3857int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3858 unsigned short port, struct rpc_cred *cred,
3859 struct nfs4_setclientid_res *res)
3860{
3861 nfs4_verifier sc_verifier;
3862 struct nfs4_setclientid setclientid = {
3863 .sc_verifier = &sc_verifier,
3864 .sc_prog = program,
3865 .sc_cb_ident = clp->cl_cb_ident,
3866 };
3867 struct rpc_message msg = {
3868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3869 .rpc_argp = &setclientid,
3870 .rpc_resp = res,
3871 .rpc_cred = cred,
3872 };
3873 int loop = 0;
3874 int status;
3875
3876 nfs4_construct_boot_verifier(clp, &sc_verifier);
3877
3878 for(;;) {
3879 rcu_read_lock();
3880 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3881 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3882 clp->cl_ipaddr,
3883 rpc_peeraddr2str(clp->cl_rpcclient,
3884 RPC_DISPLAY_ADDR),
3885 rpc_peeraddr2str(clp->cl_rpcclient,
3886 RPC_DISPLAY_PROTO),
3887 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3888 clp->cl_id_uniquifier);
3889 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3890 sizeof(setclientid.sc_netid),
3891 rpc_peeraddr2str(clp->cl_rpcclient,
3892 RPC_DISPLAY_NETID));
3893 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3894 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3895 clp->cl_ipaddr, port >> 8, port & 255);
3896 rcu_read_unlock();
3897
3898 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3899 if (status != -NFS4ERR_CLID_INUSE)
3900 break;
3901 if (loop != 0) {
3902 ++clp->cl_id_uniquifier;
3903 break;
3904 }
3905 ++loop;
3906 ssleep(clp->cl_lease_time / HZ + 1);
3907 }
3908 return status;
3909}
3910
3911int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3912 struct nfs4_setclientid_res *arg,
3913 struct rpc_cred *cred)
3914{
3915 struct nfs_fsinfo fsinfo;
3916 struct rpc_message msg = {
3917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3918 .rpc_argp = arg,
3919 .rpc_resp = &fsinfo,
3920 .rpc_cred = cred,
3921 };
3922 unsigned long now;
3923 int status;
3924
3925 now = jiffies;
3926 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3927 if (status == 0) {
3928 spin_lock(&clp->cl_lock);
3929 clp->cl_lease_time = fsinfo.lease_time * HZ;
3930 clp->cl_last_renewal = now;
3931 spin_unlock(&clp->cl_lock);
3932 }
3933 return status;
3934}
3935
3936struct nfs4_delegreturndata {
3937 struct nfs4_delegreturnargs args;
3938 struct nfs4_delegreturnres res;
3939 struct nfs_fh fh;
3940 nfs4_stateid stateid;
3941 unsigned long timestamp;
3942 struct nfs_fattr fattr;
3943 int rpc_status;
3944};
3945
3946static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3947{
3948 struct nfs4_delegreturndata *data = calldata;
3949
3950 if (!nfs4_sequence_done(task, &data->res.seq_res))
3951 return;
3952
3953 switch (task->tk_status) {
3954 case -NFS4ERR_STALE_STATEID:
3955 case -NFS4ERR_EXPIRED:
3956 case 0:
3957 renew_lease(data->res.server, data->timestamp);
3958 break;
3959 default:
3960 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3961 -EAGAIN) {
3962 rpc_restart_call_prepare(task);
3963 return;
3964 }
3965 }
3966 data->rpc_status = task->tk_status;
3967}
3968
3969static void nfs4_delegreturn_release(void *calldata)
3970{
3971 kfree(calldata);
3972}
3973
3974#if defined(CONFIG_NFS_V4_1)
3975static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3976{
3977 struct nfs4_delegreturndata *d_data;
3978
3979 d_data = (struct nfs4_delegreturndata *)data;
3980
3981 if (nfs4_setup_sequence(d_data->res.server,
3982 &d_data->args.seq_args,
3983 &d_data->res.seq_res, task))
3984 return;
3985 rpc_call_start(task);
3986}
3987#endif /* CONFIG_NFS_V4_1 */
3988
3989static const struct rpc_call_ops nfs4_delegreturn_ops = {
3990#if defined(CONFIG_NFS_V4_1)
3991 .rpc_call_prepare = nfs4_delegreturn_prepare,
3992#endif /* CONFIG_NFS_V4_1 */
3993 .rpc_call_done = nfs4_delegreturn_done,
3994 .rpc_release = nfs4_delegreturn_release,
3995};
3996
3997static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3998{
3999 struct nfs4_delegreturndata *data;
4000 struct nfs_server *server = NFS_SERVER(inode);
4001 struct rpc_task *task;
4002 struct rpc_message msg = {
4003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4004 .rpc_cred = cred,
4005 };
4006 struct rpc_task_setup task_setup_data = {
4007 .rpc_client = server->client,
4008 .rpc_message = &msg,
4009 .callback_ops = &nfs4_delegreturn_ops,
4010 .flags = RPC_TASK_ASYNC,
4011 };
4012 int status = 0;
4013
4014 data = kzalloc(sizeof(*data), GFP_NOFS);
4015 if (data == NULL)
4016 return -ENOMEM;
4017 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4018 data->args.fhandle = &data->fh;
4019 data->args.stateid = &data->stateid;
4020 data->args.bitmask = server->attr_bitmask;
4021 nfs_copy_fh(&data->fh, NFS_FH(inode));
4022 nfs4_stateid_copy(&data->stateid, stateid);
4023 data->res.fattr = &data->fattr;
4024 data->res.server = server;
4025 nfs_fattr_init(data->res.fattr);
4026 data->timestamp = jiffies;
4027 data->rpc_status = 0;
4028
4029 task_setup_data.callback_data = data;
4030 msg.rpc_argp = &data->args;
4031 msg.rpc_resp = &data->res;
4032 task = rpc_run_task(&task_setup_data);
4033 if (IS_ERR(task))
4034 return PTR_ERR(task);
4035 if (!issync)
4036 goto out;
4037 status = nfs4_wait_for_completion_rpc_task(task);
4038 if (status != 0)
4039 goto out;
4040 status = data->rpc_status;
4041 if (status != 0)
4042 goto out;
4043 nfs_refresh_inode(inode, &data->fattr);
4044out:
4045 rpc_put_task(task);
4046 return status;
4047}
4048
4049int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4050{
4051 struct nfs_server *server = NFS_SERVER(inode);
4052 struct nfs4_exception exception = { };
4053 int err;
4054 do {
4055 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4056 switch (err) {
4057 case -NFS4ERR_STALE_STATEID:
4058 case -NFS4ERR_EXPIRED:
4059 case 0:
4060 return 0;
4061 }
4062 err = nfs4_handle_exception(server, err, &exception);
4063 } while (exception.retry);
4064 return err;
4065}
4066
4067#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4068#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4069
4070/*
4071 * sleep, with exponential backoff, and retry the LOCK operation.
4072 */
4073static unsigned long
4074nfs4_set_lock_task_retry(unsigned long timeout)
4075{
4076 freezable_schedule_timeout_killable(timeout);
4077 timeout <<= 1;
4078 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4079 return NFS4_LOCK_MAXTIMEOUT;
4080 return timeout;
4081}
4082
4083static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4084{
4085 struct inode *inode = state->inode;
4086 struct nfs_server *server = NFS_SERVER(inode);
4087 struct nfs_client *clp = server->nfs_client;
4088 struct nfs_lockt_args arg = {
4089 .fh = NFS_FH(inode),
4090 .fl = request,
4091 };
4092 struct nfs_lockt_res res = {
4093 .denied = request,
4094 };
4095 struct rpc_message msg = {
4096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4097 .rpc_argp = &arg,
4098 .rpc_resp = &res,
4099 .rpc_cred = state->owner->so_cred,
4100 };
4101 struct nfs4_lock_state *lsp;
4102 int status;
4103
4104 arg.lock_owner.clientid = clp->cl_clientid;
4105 status = nfs4_set_lock_state(state, request);
4106 if (status != 0)
4107 goto out;
4108 lsp = request->fl_u.nfs4_fl.owner;
4109 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4110 arg.lock_owner.s_dev = server->s_dev;
4111 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4112 switch (status) {
4113 case 0:
4114 request->fl_type = F_UNLCK;
4115 break;
4116 case -NFS4ERR_DENIED:
4117 status = 0;
4118 }
4119 request->fl_ops->fl_release_private(request);
4120out:
4121 return status;
4122}
4123
4124static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4125{
4126 struct nfs4_exception exception = { };
4127 int err;
4128
4129 do {
4130 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4131 _nfs4_proc_getlk(state, cmd, request),
4132 &exception);
4133 } while (exception.retry);
4134 return err;
4135}
4136
4137static int do_vfs_lock(struct file *file, struct file_lock *fl)
4138{
4139 int res = 0;
4140 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4141 case FL_POSIX:
4142 res = posix_lock_file_wait(file, fl);
4143 break;
4144 case FL_FLOCK:
4145 res = flock_lock_file_wait(file, fl);
4146 break;
4147 default:
4148 BUG();
4149 }
4150 return res;
4151}
4152
4153struct nfs4_unlockdata {
4154 struct nfs_locku_args arg;
4155 struct nfs_locku_res res;
4156 struct nfs4_lock_state *lsp;
4157 struct nfs_open_context *ctx;
4158 struct file_lock fl;
4159 const struct nfs_server *server;
4160 unsigned long timestamp;
4161};
4162
4163static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4164 struct nfs_open_context *ctx,
4165 struct nfs4_lock_state *lsp,
4166 struct nfs_seqid *seqid)
4167{
4168 struct nfs4_unlockdata *p;
4169 struct inode *inode = lsp->ls_state->inode;
4170
4171 p = kzalloc(sizeof(*p), GFP_NOFS);
4172 if (p == NULL)
4173 return NULL;
4174 p->arg.fh = NFS_FH(inode);
4175 p->arg.fl = &p->fl;
4176 p->arg.seqid = seqid;
4177 p->res.seqid = seqid;
4178 p->arg.stateid = &lsp->ls_stateid;
4179 p->lsp = lsp;
4180 atomic_inc(&lsp->ls_count);
4181 /* Ensure we don't close file until we're done freeing locks! */
4182 p->ctx = get_nfs_open_context(ctx);
4183 memcpy(&p->fl, fl, sizeof(p->fl));
4184 p->server = NFS_SERVER(inode);
4185 return p;
4186}
4187
4188static void nfs4_locku_release_calldata(void *data)
4189{
4190 struct nfs4_unlockdata *calldata = data;
4191 nfs_free_seqid(calldata->arg.seqid);
4192 nfs4_put_lock_state(calldata->lsp);
4193 put_nfs_open_context(calldata->ctx);
4194 kfree(calldata);
4195}
4196
4197static void nfs4_locku_done(struct rpc_task *task, void *data)
4198{
4199 struct nfs4_unlockdata *calldata = data;
4200
4201 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4202 return;
4203 switch (task->tk_status) {
4204 case 0:
4205 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4206 &calldata->res.stateid);
4207 renew_lease(calldata->server, calldata->timestamp);
4208 break;
4209 case -NFS4ERR_BAD_STATEID:
4210 case -NFS4ERR_OLD_STATEID:
4211 case -NFS4ERR_STALE_STATEID:
4212 case -NFS4ERR_EXPIRED:
4213 break;
4214 default:
4215 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4216 rpc_restart_call_prepare(task);
4217 }
4218}
4219
4220static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4221{
4222 struct nfs4_unlockdata *calldata = data;
4223
4224 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4225 return;
4226 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4227 /* Note: exit _without_ running nfs4_locku_done */
4228 task->tk_action = NULL;
4229 return;
4230 }
4231 calldata->timestamp = jiffies;
4232 if (nfs4_setup_sequence(calldata->server,
4233 &calldata->arg.seq_args,
4234 &calldata->res.seq_res, task))
4235 return;
4236 rpc_call_start(task);
4237}
4238
4239static const struct rpc_call_ops nfs4_locku_ops = {
4240 .rpc_call_prepare = nfs4_locku_prepare,
4241 .rpc_call_done = nfs4_locku_done,
4242 .rpc_release = nfs4_locku_release_calldata,
4243};
4244
4245static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4246 struct nfs_open_context *ctx,
4247 struct nfs4_lock_state *lsp,
4248 struct nfs_seqid *seqid)
4249{
4250 struct nfs4_unlockdata *data;
4251 struct rpc_message msg = {
4252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4253 .rpc_cred = ctx->cred,
4254 };
4255 struct rpc_task_setup task_setup_data = {
4256 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4257 .rpc_message = &msg,
4258 .callback_ops = &nfs4_locku_ops,
4259 .workqueue = nfsiod_workqueue,
4260 .flags = RPC_TASK_ASYNC,
4261 };
4262
4263 /* Ensure this is an unlock - when canceling a lock, the
4264 * canceled lock is passed in, and it won't be an unlock.
4265 */
4266 fl->fl_type = F_UNLCK;
4267
4268 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4269 if (data == NULL) {
4270 nfs_free_seqid(seqid);
4271 return ERR_PTR(-ENOMEM);
4272 }
4273
4274 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4275 msg.rpc_argp = &data->arg;
4276 msg.rpc_resp = &data->res;
4277 task_setup_data.callback_data = data;
4278 return rpc_run_task(&task_setup_data);
4279}
4280
4281static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4282{
4283 struct nfs_inode *nfsi = NFS_I(state->inode);
4284 struct nfs_seqid *seqid;
4285 struct nfs4_lock_state *lsp;
4286 struct rpc_task *task;
4287 int status = 0;
4288 unsigned char fl_flags = request->fl_flags;
4289
4290 status = nfs4_set_lock_state(state, request);
4291 /* Unlock _before_ we do the RPC call */
4292 request->fl_flags |= FL_EXISTS;
4293 down_read(&nfsi->rwsem);
4294 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4295 up_read(&nfsi->rwsem);
4296 goto out;
4297 }
4298 up_read(&nfsi->rwsem);
4299 if (status != 0)
4300 goto out;
4301 /* Is this a delegated lock? */
4302 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4303 goto out;
4304 lsp = request->fl_u.nfs4_fl.owner;
4305 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4306 status = -ENOMEM;
4307 if (seqid == NULL)
4308 goto out;
4309 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4310 status = PTR_ERR(task);
4311 if (IS_ERR(task))
4312 goto out;
4313 status = nfs4_wait_for_completion_rpc_task(task);
4314 rpc_put_task(task);
4315out:
4316 request->fl_flags = fl_flags;
4317 return status;
4318}
4319
4320struct nfs4_lockdata {
4321 struct nfs_lock_args arg;
4322 struct nfs_lock_res res;
4323 struct nfs4_lock_state *lsp;
4324 struct nfs_open_context *ctx;
4325 struct file_lock fl;
4326 unsigned long timestamp;
4327 int rpc_status;
4328 int cancelled;
4329 struct nfs_server *server;
4330};
4331
4332static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4333 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4334 gfp_t gfp_mask)
4335{
4336 struct nfs4_lockdata *p;
4337 struct inode *inode = lsp->ls_state->inode;
4338 struct nfs_server *server = NFS_SERVER(inode);
4339
4340 p = kzalloc(sizeof(*p), gfp_mask);
4341 if (p == NULL)
4342 return NULL;
4343
4344 p->arg.fh = NFS_FH(inode);
4345 p->arg.fl = &p->fl;
4346 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4347 if (p->arg.open_seqid == NULL)
4348 goto out_free;
4349 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4350 if (p->arg.lock_seqid == NULL)
4351 goto out_free_seqid;
4352 p->arg.lock_stateid = &lsp->ls_stateid;
4353 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4354 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4355 p->arg.lock_owner.s_dev = server->s_dev;
4356 p->res.lock_seqid = p->arg.lock_seqid;
4357 p->lsp = lsp;
4358 p->server = server;
4359 atomic_inc(&lsp->ls_count);
4360 p->ctx = get_nfs_open_context(ctx);
4361 memcpy(&p->fl, fl, sizeof(p->fl));
4362 return p;
4363out_free_seqid:
4364 nfs_free_seqid(p->arg.open_seqid);
4365out_free:
4366 kfree(p);
4367 return NULL;
4368}
4369
4370static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4371{
4372 struct nfs4_lockdata *data = calldata;
4373 struct nfs4_state *state = data->lsp->ls_state;
4374
4375 dprintk("%s: begin!\n", __func__);
4376 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4377 return;
4378 /* Do we need to do an open_to_lock_owner? */
4379 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4380 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4381 return;
4382 data->arg.open_stateid = &state->stateid;
4383 data->arg.new_lock_owner = 1;
4384 data->res.open_seqid = data->arg.open_seqid;
4385 } else
4386 data->arg.new_lock_owner = 0;
4387 data->timestamp = jiffies;
4388 if (nfs4_setup_sequence(data->server,
4389 &data->arg.seq_args,
4390 &data->res.seq_res, task))
4391 return;
4392 rpc_call_start(task);
4393 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4394}
4395
4396static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4397{
4398 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4399 nfs4_lock_prepare(task, calldata);
4400}
4401
4402static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4403{
4404 struct nfs4_lockdata *data = calldata;
4405
4406 dprintk("%s: begin!\n", __func__);
4407
4408 if (!nfs4_sequence_done(task, &data->res.seq_res))
4409 return;
4410
4411 data->rpc_status = task->tk_status;
4412 if (data->arg.new_lock_owner != 0) {
4413 if (data->rpc_status == 0)
4414 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4415 else
4416 goto out;
4417 }
4418 if (data->rpc_status == 0) {
4419 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4420 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4421 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4422 }
4423out:
4424 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4425}
4426
4427static void nfs4_lock_release(void *calldata)
4428{
4429 struct nfs4_lockdata *data = calldata;
4430
4431 dprintk("%s: begin!\n", __func__);
4432 nfs_free_seqid(data->arg.open_seqid);
4433 if (data->cancelled != 0) {
4434 struct rpc_task *task;
4435 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4436 data->arg.lock_seqid);
4437 if (!IS_ERR(task))
4438 rpc_put_task_async(task);
4439 dprintk("%s: cancelling lock!\n", __func__);
4440 } else
4441 nfs_free_seqid(data->arg.lock_seqid);
4442 nfs4_put_lock_state(data->lsp);
4443 put_nfs_open_context(data->ctx);
4444 kfree(data);
4445 dprintk("%s: done!\n", __func__);
4446}
4447
4448static const struct rpc_call_ops nfs4_lock_ops = {
4449 .rpc_call_prepare = nfs4_lock_prepare,
4450 .rpc_call_done = nfs4_lock_done,
4451 .rpc_release = nfs4_lock_release,
4452};
4453
4454static const struct rpc_call_ops nfs4_recover_lock_ops = {
4455 .rpc_call_prepare = nfs4_recover_lock_prepare,
4456 .rpc_call_done = nfs4_lock_done,
4457 .rpc_release = nfs4_lock_release,
4458};
4459
4460static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4461{
4462 switch (error) {
4463 case -NFS4ERR_ADMIN_REVOKED:
4464 case -NFS4ERR_BAD_STATEID:
4465 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4466 if (new_lock_owner != 0 ||
4467 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4468 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4469 break;
4470 case -NFS4ERR_STALE_STATEID:
4471 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4472 case -NFS4ERR_EXPIRED:
4473 nfs4_schedule_lease_recovery(server->nfs_client);
4474 };
4475}
4476
4477static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4478{
4479 struct nfs4_lockdata *data;
4480 struct rpc_task *task;
4481 struct rpc_message msg = {
4482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4483 .rpc_cred = state->owner->so_cred,
4484 };
4485 struct rpc_task_setup task_setup_data = {
4486 .rpc_client = NFS_CLIENT(state->inode),
4487 .rpc_message = &msg,
4488 .callback_ops = &nfs4_lock_ops,
4489 .workqueue = nfsiod_workqueue,
4490 .flags = RPC_TASK_ASYNC,
4491 };
4492 int ret;
4493
4494 dprintk("%s: begin!\n", __func__);
4495 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4496 fl->fl_u.nfs4_fl.owner,
4497 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4498 if (data == NULL)
4499 return -ENOMEM;
4500 if (IS_SETLKW(cmd))
4501 data->arg.block = 1;
4502 if (recovery_type > NFS_LOCK_NEW) {
4503 if (recovery_type == NFS_LOCK_RECLAIM)
4504 data->arg.reclaim = NFS_LOCK_RECLAIM;
4505 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4506 }
4507 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4508 msg.rpc_argp = &data->arg;
4509 msg.rpc_resp = &data->res;
4510 task_setup_data.callback_data = data;
4511 task = rpc_run_task(&task_setup_data);
4512 if (IS_ERR(task))
4513 return PTR_ERR(task);
4514 ret = nfs4_wait_for_completion_rpc_task(task);
4515 if (ret == 0) {
4516 ret = data->rpc_status;
4517 if (ret)
4518 nfs4_handle_setlk_error(data->server, data->lsp,
4519 data->arg.new_lock_owner, ret);
4520 } else
4521 data->cancelled = 1;
4522 rpc_put_task(task);
4523 dprintk("%s: done, ret = %d!\n", __func__, ret);
4524 return ret;
4525}
4526
4527static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4528{
4529 struct nfs_server *server = NFS_SERVER(state->inode);
4530 struct nfs4_exception exception = { };
4531 int err;
4532
4533 do {
4534 /* Cache the lock if possible... */
4535 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4536 return 0;
4537 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4538 if (err != -NFS4ERR_DELAY)
4539 break;
4540 nfs4_handle_exception(server, err, &exception);
4541 } while (exception.retry);
4542 return err;
4543}
4544
4545static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4546{
4547 struct nfs_server *server = NFS_SERVER(state->inode);
4548 struct nfs4_exception exception = { };
4549 int err;
4550
4551 err = nfs4_set_lock_state(state, request);
4552 if (err != 0)
4553 return err;
4554 do {
4555 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4556 return 0;
4557 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4558 switch (err) {
4559 default:
4560 goto out;
4561 case -NFS4ERR_GRACE:
4562 case -NFS4ERR_DELAY:
4563 nfs4_handle_exception(server, err, &exception);
4564 err = 0;
4565 }
4566 } while (exception.retry);
4567out:
4568 return err;
4569}
4570
4571#if defined(CONFIG_NFS_V4_1)
4572static int nfs41_check_expired_locks(struct nfs4_state *state)
4573{
4574 int status, ret = NFS_OK;
4575 struct nfs4_lock_state *lsp;
4576 struct nfs_server *server = NFS_SERVER(state->inode);
4577
4578 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4579 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4580 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4581 if (status != NFS_OK) {
4582 nfs41_free_stateid(server, &lsp->ls_stateid);
4583 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4584 ret = status;
4585 }
4586 }
4587 };
4588
4589 return ret;
4590}
4591
4592static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4593{
4594 int status = NFS_OK;
4595
4596 if (test_bit(LK_STATE_IN_USE, &state->flags))
4597 status = nfs41_check_expired_locks(state);
4598 if (status == NFS_OK)
4599 return status;
4600 return nfs4_lock_expired(state, request);
4601}
4602#endif
4603
4604static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4605{
4606 struct nfs_inode *nfsi = NFS_I(state->inode);
4607 unsigned char fl_flags = request->fl_flags;
4608 int status = -ENOLCK;
4609
4610 if ((fl_flags & FL_POSIX) &&
4611 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4612 goto out;
4613 /* Is this a delegated open? */
4614 status = nfs4_set_lock_state(state, request);
4615 if (status != 0)
4616 goto out;
4617 request->fl_flags |= FL_ACCESS;
4618 status = do_vfs_lock(request->fl_file, request);
4619 if (status < 0)
4620 goto out;
4621 down_read(&nfsi->rwsem);
4622 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4623 /* Yes: cache locks! */
4624 /* ...but avoid races with delegation recall... */
4625 request->fl_flags = fl_flags & ~FL_SLEEP;
4626 status = do_vfs_lock(request->fl_file, request);
4627 goto out_unlock;
4628 }
4629 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4630 if (status != 0)
4631 goto out_unlock;
4632 /* Note: we always want to sleep here! */
4633 request->fl_flags = fl_flags | FL_SLEEP;
4634 if (do_vfs_lock(request->fl_file, request) < 0)
4635 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4636 "manager!\n", __func__);
4637out_unlock:
4638 up_read(&nfsi->rwsem);
4639out:
4640 request->fl_flags = fl_flags;
4641 return status;
4642}
4643
4644static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4645{
4646 struct nfs4_exception exception = {
4647 .state = state,
4648 };
4649 int err;
4650
4651 do {
4652 err = _nfs4_proc_setlk(state, cmd, request);
4653 if (err == -NFS4ERR_DENIED)
4654 err = -EAGAIN;
4655 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4656 err, &exception);
4657 } while (exception.retry);
4658 return err;
4659}
4660
4661static int
4662nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4663{
4664 struct nfs_open_context *ctx;
4665 struct nfs4_state *state;
4666 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4667 int status;
4668
4669 /* verify open state */
4670 ctx = nfs_file_open_context(filp);
4671 state = ctx->state;
4672
4673 if (request->fl_start < 0 || request->fl_end < 0)
4674 return -EINVAL;
4675
4676 if (IS_GETLK(cmd)) {
4677 if (state != NULL)
4678 return nfs4_proc_getlk(state, F_GETLK, request);
4679 return 0;
4680 }
4681
4682 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4683 return -EINVAL;
4684
4685 if (request->fl_type == F_UNLCK) {
4686 if (state != NULL)
4687 return nfs4_proc_unlck(state, cmd, request);
4688 return 0;
4689 }
4690
4691 if (state == NULL)
4692 return -ENOLCK;
4693 do {
4694 status = nfs4_proc_setlk(state, cmd, request);
4695 if ((status != -EAGAIN) || IS_SETLK(cmd))
4696 break;
4697 timeout = nfs4_set_lock_task_retry(timeout);
4698 status = -ERESTARTSYS;
4699 if (signalled())
4700 break;
4701 } while(status < 0);
4702 return status;
4703}
4704
4705int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4706{
4707 struct nfs_server *server = NFS_SERVER(state->inode);
4708 struct nfs4_exception exception = { };
4709 int err;
4710
4711 err = nfs4_set_lock_state(state, fl);
4712 if (err != 0)
4713 goto out;
4714 do {
4715 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4716 switch (err) {
4717 default:
4718 printk(KERN_ERR "NFS: %s: unhandled error "
4719 "%d.\n", __func__, err);
4720 case 0:
4721 case -ESTALE:
4722 goto out;
4723 case -NFS4ERR_EXPIRED:
4724 nfs4_schedule_stateid_recovery(server, state);
4725 case -NFS4ERR_STALE_CLIENTID:
4726 case -NFS4ERR_STALE_STATEID:
4727 nfs4_schedule_lease_recovery(server->nfs_client);
4728 goto out;
4729 case -NFS4ERR_BADSESSION:
4730 case -NFS4ERR_BADSLOT:
4731 case -NFS4ERR_BAD_HIGH_SLOT:
4732 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4733 case -NFS4ERR_DEADSESSION:
4734 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4735 goto out;
4736 case -ERESTARTSYS:
4737 /*
4738 * The show must go on: exit, but mark the
4739 * stateid as needing recovery.
4740 */
4741 case -NFS4ERR_DELEG_REVOKED:
4742 case -NFS4ERR_ADMIN_REVOKED:
4743 case -NFS4ERR_BAD_STATEID:
4744 case -NFS4ERR_OPENMODE:
4745 nfs4_schedule_stateid_recovery(server, state);
4746 err = 0;
4747 goto out;
4748 case -EKEYEXPIRED:
4749 /*
4750 * User RPCSEC_GSS context has expired.
4751 * We cannot recover this stateid now, so
4752 * skip it and allow recovery thread to
4753 * proceed.
4754 */
4755 err = 0;
4756 goto out;
4757 case -ENOMEM:
4758 case -NFS4ERR_DENIED:
4759 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4760 err = 0;
4761 goto out;
4762 case -NFS4ERR_DELAY:
4763 break;
4764 }
4765 err = nfs4_handle_exception(server, err, &exception);
4766 } while (exception.retry);
4767out:
4768 return err;
4769}
4770
4771struct nfs_release_lockowner_data {
4772 struct nfs4_lock_state *lsp;
4773 struct nfs_server *server;
4774 struct nfs_release_lockowner_args args;
4775};
4776
4777static void nfs4_release_lockowner_release(void *calldata)
4778{
4779 struct nfs_release_lockowner_data *data = calldata;
4780 nfs4_free_lock_state(data->server, data->lsp);
4781 kfree(calldata);
4782}
4783
4784static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4785 .rpc_release = nfs4_release_lockowner_release,
4786};
4787
4788int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4789{
4790 struct nfs_server *server = lsp->ls_state->owner->so_server;
4791 struct nfs_release_lockowner_data *data;
4792 struct rpc_message msg = {
4793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4794 };
4795
4796 if (server->nfs_client->cl_mvops->minor_version != 0)
4797 return -EINVAL;
4798 data = kmalloc(sizeof(*data), GFP_NOFS);
4799 if (!data)
4800 return -ENOMEM;
4801 data->lsp = lsp;
4802 data->server = server;
4803 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4804 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4805 data->args.lock_owner.s_dev = server->s_dev;
4806 msg.rpc_argp = &data->args;
4807 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4808 return 0;
4809}
4810
4811#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4812
4813static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4814 const void *buf, size_t buflen,
4815 int flags, int type)
4816{
4817 if (strcmp(key, "") != 0)
4818 return -EINVAL;
4819
4820 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4821}
4822
4823static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4824 void *buf, size_t buflen, int type)
4825{
4826 if (strcmp(key, "") != 0)
4827 return -EINVAL;
4828
4829 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4830}
4831
4832static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4833 size_t list_len, const char *name,
4834 size_t name_len, int type)
4835{
4836 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4837
4838 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4839 return 0;
4840
4841 if (list && len <= list_len)
4842 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4843 return len;
4844}
4845
4846/*
4847 * nfs_fhget will use either the mounted_on_fileid or the fileid
4848 */
4849static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4850{
4851 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4852 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4853 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4854 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4855 return;
4856
4857 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4858 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4859 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4860 fattr->nlink = 2;
4861}
4862
4863int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4864 struct nfs4_fs_locations *fs_locations, struct page *page)
4865{
4866 struct nfs_server *server = NFS_SERVER(dir);
4867 u32 bitmask[2] = {
4868 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4869 };
4870 struct nfs4_fs_locations_arg args = {
4871 .dir_fh = NFS_FH(dir),
4872 .name = name,
4873 .page = page,
4874 .bitmask = bitmask,
4875 };
4876 struct nfs4_fs_locations_res res = {
4877 .fs_locations = fs_locations,
4878 };
4879 struct rpc_message msg = {
4880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4881 .rpc_argp = &args,
4882 .rpc_resp = &res,
4883 };
4884 int status;
4885
4886 dprintk("%s: start\n", __func__);
4887
4888 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4889 * is not supported */
4890 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4891 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4892 else
4893 bitmask[0] |= FATTR4_WORD0_FILEID;
4894
4895 nfs_fattr_init(&fs_locations->fattr);
4896 fs_locations->server = server;
4897 fs_locations->nlocations = 0;
4898 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4899 dprintk("%s: returned status = %d\n", __func__, status);
4900 return status;
4901}
4902
4903static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4904{
4905 int status;
4906 struct nfs4_secinfo_arg args = {
4907 .dir_fh = NFS_FH(dir),
4908 .name = name,
4909 };
4910 struct nfs4_secinfo_res res = {
4911 .flavors = flavors,
4912 };
4913 struct rpc_message msg = {
4914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4915 .rpc_argp = &args,
4916 .rpc_resp = &res,
4917 };
4918
4919 dprintk("NFS call secinfo %s\n", name->name);
4920 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4921 dprintk("NFS reply secinfo: %d\n", status);
4922 return status;
4923}
4924
4925static int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
4926 struct nfs4_secinfo_flavors *flavors)
4927{
4928 struct nfs4_exception exception = { };
4929 int err;
4930 do {
4931 err = nfs4_handle_exception(NFS_SERVER(dir),
4932 _nfs4_proc_secinfo(dir, name, flavors),
4933 &exception);
4934 } while (exception.retry);
4935 return err;
4936}
4937
4938#ifdef CONFIG_NFS_V4_1
4939/*
4940 * Check the exchange flags returned by the server for invalid flags, having
4941 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4942 * DS flags set.
4943 */
4944static int nfs4_check_cl_exchange_flags(u32 flags)
4945{
4946 if (flags & ~EXCHGID4_FLAG_MASK_R)
4947 goto out_inval;
4948 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4949 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4950 goto out_inval;
4951 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4952 goto out_inval;
4953 return NFS_OK;
4954out_inval:
4955 return -NFS4ERR_INVAL;
4956}
4957
4958static bool
4959nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4960{
4961 if (a->server_scope_sz == b->server_scope_sz &&
4962 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4963 return true;
4964
4965 return false;
4966}
4967
4968/*
4969 * nfs4_proc_exchange_id()
4970 *
4971 * Since the clientid has expired, all compounds using sessions
4972 * associated with the stale clientid will be returning
4973 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4974 * be in some phase of session reset.
4975 */
4976int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4977{
4978 nfs4_verifier verifier;
4979 struct nfs41_exchange_id_args args = {
4980 .verifier = &verifier,
4981 .client = clp,
4982 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4983 };
4984 struct nfs41_exchange_id_res res = {
4985 .client = clp,
4986 };
4987 int status;
4988 struct rpc_message msg = {
4989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4990 .rpc_argp = &args,
4991 .rpc_resp = &res,
4992 .rpc_cred = cred,
4993 };
4994
4995 dprintk("--> %s\n", __func__);
4996 BUG_ON(clp == NULL);
4997
4998 nfs4_construct_boot_verifier(clp, &verifier);
4999
5000 args.id_len = scnprintf(args.id, sizeof(args.id),
5001 "%s/%s.%s/%u",
5002 clp->cl_ipaddr,
5003 init_utsname()->nodename,
5004 init_utsname()->domainname,
5005 clp->cl_rpcclient->cl_auth->au_flavor);
5006
5007 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
5008 if (unlikely(!res.server_scope)) {
5009 status = -ENOMEM;
5010 goto out;
5011 }
5012
5013 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5014 if (unlikely(!res.impl_id)) {
5015 status = -ENOMEM;
5016 goto out_server_scope;
5017 }
5018
5019 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5020 if (!status)
5021 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
5022
5023 if (!status) {
5024 /* use the most recent implementation id */
5025 kfree(clp->impl_id);
5026 clp->impl_id = res.impl_id;
5027 } else
5028 kfree(res.impl_id);
5029
5030 if (!status) {
5031 if (clp->server_scope &&
5032 !nfs41_same_server_scope(clp->server_scope,
5033 res.server_scope)) {
5034 dprintk("%s: server_scope mismatch detected\n",
5035 __func__);
5036 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5037 kfree(clp->server_scope);
5038 clp->server_scope = NULL;
5039 }
5040
5041 if (!clp->server_scope) {
5042 clp->server_scope = res.server_scope;
5043 goto out;
5044 }
5045 }
5046
5047out_server_scope:
5048 kfree(res.server_scope);
5049out:
5050 if (clp->impl_id)
5051 dprintk("%s: Server Implementation ID: "
5052 "domain: %s, name: %s, date: %llu,%u\n",
5053 __func__, clp->impl_id->domain, clp->impl_id->name,
5054 clp->impl_id->date.seconds,
5055 clp->impl_id->date.nseconds);
5056 dprintk("<-- %s status= %d\n", __func__, status);
5057 return status;
5058}
5059
5060struct nfs4_get_lease_time_data {
5061 struct nfs4_get_lease_time_args *args;
5062 struct nfs4_get_lease_time_res *res;
5063 struct nfs_client *clp;
5064};
5065
5066static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5067 void *calldata)
5068{
5069 int ret;
5070 struct nfs4_get_lease_time_data *data =
5071 (struct nfs4_get_lease_time_data *)calldata;
5072
5073 dprintk("--> %s\n", __func__);
5074 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5075 /* just setup sequence, do not trigger session recovery
5076 since we're invoked within one */
5077 ret = nfs41_setup_sequence(data->clp->cl_session,
5078 &data->args->la_seq_args,
5079 &data->res->lr_seq_res, task);
5080
5081 BUG_ON(ret == -EAGAIN);
5082 rpc_call_start(task);
5083 dprintk("<-- %s\n", __func__);
5084}
5085
5086/*
5087 * Called from nfs4_state_manager thread for session setup, so don't recover
5088 * from sequence operation or clientid errors.
5089 */
5090static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5091{
5092 struct nfs4_get_lease_time_data *data =
5093 (struct nfs4_get_lease_time_data *)calldata;
5094
5095 dprintk("--> %s\n", __func__);
5096 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5097 return;
5098 switch (task->tk_status) {
5099 case -NFS4ERR_DELAY:
5100 case -NFS4ERR_GRACE:
5101 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5102 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5103 task->tk_status = 0;
5104 /* fall through */
5105 case -NFS4ERR_RETRY_UNCACHED_REP:
5106 rpc_restart_call_prepare(task);
5107 return;
5108 }
5109 dprintk("<-- %s\n", __func__);
5110}
5111
5112static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5113 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5114 .rpc_call_done = nfs4_get_lease_time_done,
5115};
5116
5117int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5118{
5119 struct rpc_task *task;
5120 struct nfs4_get_lease_time_args args;
5121 struct nfs4_get_lease_time_res res = {
5122 .lr_fsinfo = fsinfo,
5123 };
5124 struct nfs4_get_lease_time_data data = {
5125 .args = &args,
5126 .res = &res,
5127 .clp = clp,
5128 };
5129 struct rpc_message msg = {
5130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5131 .rpc_argp = &args,
5132 .rpc_resp = &res,
5133 };
5134 struct rpc_task_setup task_setup = {
5135 .rpc_client = clp->cl_rpcclient,
5136 .rpc_message = &msg,
5137 .callback_ops = &nfs4_get_lease_time_ops,
5138 .callback_data = &data,
5139 .flags = RPC_TASK_TIMEOUT,
5140 };
5141 int status;
5142
5143 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5144 dprintk("--> %s\n", __func__);
5145 task = rpc_run_task(&task_setup);
5146
5147 if (IS_ERR(task))
5148 status = PTR_ERR(task);
5149 else {
5150 status = task->tk_status;
5151 rpc_put_task(task);
5152 }
5153 dprintk("<-- %s return %d\n", __func__, status);
5154
5155 return status;
5156}
5157
5158static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5159{
5160 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5161}
5162
5163static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5164 struct nfs4_slot *new,
5165 u32 max_slots,
5166 u32 ivalue)
5167{
5168 struct nfs4_slot *old = NULL;
5169 u32 i;
5170
5171 spin_lock(&tbl->slot_tbl_lock);
5172 if (new) {
5173 old = tbl->slots;
5174 tbl->slots = new;
5175 tbl->max_slots = max_slots;
5176 }
5177 tbl->highest_used_slotid = -1; /* no slot is currently used */
5178 for (i = 0; i < tbl->max_slots; i++)
5179 tbl->slots[i].seq_nr = ivalue;
5180 spin_unlock(&tbl->slot_tbl_lock);
5181 kfree(old);
5182}
5183
5184/*
5185 * (re)Initialise a slot table
5186 */
5187static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5188 u32 ivalue)
5189{
5190 struct nfs4_slot *new = NULL;
5191 int ret = -ENOMEM;
5192
5193 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5194 max_reqs, tbl->max_slots);
5195
5196 /* Does the newly negotiated max_reqs match the existing slot table? */
5197 if (max_reqs != tbl->max_slots) {
5198 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5199 if (!new)
5200 goto out;
5201 }
5202 ret = 0;
5203
5204 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5205 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5206 tbl, tbl->slots, tbl->max_slots);
5207out:
5208 dprintk("<-- %s: return %d\n", __func__, ret);
5209 return ret;
5210}
5211
5212/* Destroy the slot table */
5213static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5214{
5215 if (session->fc_slot_table.slots != NULL) {
5216 kfree(session->fc_slot_table.slots);
5217 session->fc_slot_table.slots = NULL;
5218 }
5219 if (session->bc_slot_table.slots != NULL) {
5220 kfree(session->bc_slot_table.slots);
5221 session->bc_slot_table.slots = NULL;
5222 }
5223 return;
5224}
5225
5226/*
5227 * Initialize or reset the forechannel and backchannel tables
5228 */
5229static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5230{
5231 struct nfs4_slot_table *tbl;
5232 int status;
5233
5234 dprintk("--> %s\n", __func__);
5235 /* Fore channel */
5236 tbl = &ses->fc_slot_table;
5237 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5238 if (status) /* -ENOMEM */
5239 return status;
5240 /* Back channel */
5241 tbl = &ses->bc_slot_table;
5242 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5243 if (status && tbl->slots == NULL)
5244 /* Fore and back channel share a connection so get
5245 * both slot tables or neither */
5246 nfs4_destroy_slot_tables(ses);
5247 return status;
5248}
5249
5250struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5251{
5252 struct nfs4_session *session;
5253 struct nfs4_slot_table *tbl;
5254
5255 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5256 if (!session)
5257 return NULL;
5258
5259 tbl = &session->fc_slot_table;
5260 tbl->highest_used_slotid = NFS4_NO_SLOT;
5261 spin_lock_init(&tbl->slot_tbl_lock);
5262 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5263 init_completion(&tbl->complete);
5264
5265 tbl = &session->bc_slot_table;
5266 tbl->highest_used_slotid = NFS4_NO_SLOT;
5267 spin_lock_init(&tbl->slot_tbl_lock);
5268 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5269 init_completion(&tbl->complete);
5270
5271 session->session_state = 1<<NFS4_SESSION_INITING;
5272
5273 session->clp = clp;
5274 return session;
5275}
5276
5277void nfs4_destroy_session(struct nfs4_session *session)
5278{
5279 struct rpc_xprt *xprt;
5280
5281 nfs4_proc_destroy_session(session);
5282
5283 rcu_read_lock();
5284 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5285 rcu_read_unlock();
5286 dprintk("%s Destroy backchannel for xprt %p\n",
5287 __func__, xprt);
5288 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5289 nfs4_destroy_slot_tables(session);
5290 kfree(session);
5291}
5292
5293/*
5294 * Initialize the values to be used by the client in CREATE_SESSION
5295 * If nfs4_init_session set the fore channel request and response sizes,
5296 * use them.
5297 *
5298 * Set the back channel max_resp_sz_cached to zero to force the client to
5299 * always set csa_cachethis to FALSE because the current implementation
5300 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5301 */
5302static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5303{
5304 struct nfs4_session *session = args->client->cl_session;
5305 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5306 mxresp_sz = session->fc_attrs.max_resp_sz;
5307
5308 if (mxrqst_sz == 0)
5309 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5310 if (mxresp_sz == 0)
5311 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5312 /* Fore channel attributes */
5313 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5314 args->fc_attrs.max_resp_sz = mxresp_sz;
5315 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5316 args->fc_attrs.max_reqs = max_session_slots;
5317
5318 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5319 "max_ops=%u max_reqs=%u\n",
5320 __func__,
5321 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5322 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5323
5324 /* Back channel attributes */
5325 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5326 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5327 args->bc_attrs.max_resp_sz_cached = 0;
5328 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5329 args->bc_attrs.max_reqs = 1;
5330
5331 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5332 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5333 __func__,
5334 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5335 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5336 args->bc_attrs.max_reqs);
5337}
5338
5339static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5340{
5341 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5342 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5343
5344 if (rcvd->max_resp_sz > sent->max_resp_sz)
5345 return -EINVAL;
5346 /*
5347 * Our requested max_ops is the minimum we need; we're not
5348 * prepared to break up compounds into smaller pieces than that.
5349 * So, no point even trying to continue if the server won't
5350 * cooperate:
5351 */
5352 if (rcvd->max_ops < sent->max_ops)
5353 return -EINVAL;
5354 if (rcvd->max_reqs == 0)
5355 return -EINVAL;
5356 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5357 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5358 return 0;
5359}
5360
5361static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5362{
5363 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5364 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5365
5366 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5367 return -EINVAL;
5368 if (rcvd->max_resp_sz < sent->max_resp_sz)
5369 return -EINVAL;
5370 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5371 return -EINVAL;
5372 /* These would render the backchannel useless: */
5373 if (rcvd->max_ops != sent->max_ops)
5374 return -EINVAL;
5375 if (rcvd->max_reqs != sent->max_reqs)
5376 return -EINVAL;
5377 return 0;
5378}
5379
5380static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5381 struct nfs4_session *session)
5382{
5383 int ret;
5384
5385 ret = nfs4_verify_fore_channel_attrs(args, session);
5386 if (ret)
5387 return ret;
5388 return nfs4_verify_back_channel_attrs(args, session);
5389}
5390
5391static int _nfs4_proc_create_session(struct nfs_client *clp)
5392{
5393 struct nfs4_session *session = clp->cl_session;
5394 struct nfs41_create_session_args args = {
5395 .client = clp,
5396 .cb_program = NFS4_CALLBACK,
5397 };
5398 struct nfs41_create_session_res res = {
5399 .client = clp,
5400 };
5401 struct rpc_message msg = {
5402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5403 .rpc_argp = &args,
5404 .rpc_resp = &res,
5405 };
5406 int status;
5407
5408 nfs4_init_channel_attrs(&args);
5409 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5410
5411 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5412
5413 if (!status)
5414 /* Verify the session's negotiated channel_attrs values */
5415 status = nfs4_verify_channel_attrs(&args, session);
5416 if (!status) {
5417 /* Increment the clientid slot sequence id */
5418 clp->cl_seqid++;
5419 }
5420
5421 return status;
5422}
5423
5424/*
5425 * Issues a CREATE_SESSION operation to the server.
5426 * It is the responsibility of the caller to verify the session is
5427 * expired before calling this routine.
5428 */
5429int nfs4_proc_create_session(struct nfs_client *clp)
5430{
5431 int status;
5432 unsigned *ptr;
5433 struct nfs4_session *session = clp->cl_session;
5434
5435 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5436
5437 status = _nfs4_proc_create_session(clp);
5438 if (status)
5439 goto out;
5440
5441 /* Init or reset the session slot tables */
5442 status = nfs4_setup_session_slot_tables(session);
5443 dprintk("slot table setup returned %d\n", status);
5444 if (status)
5445 goto out;
5446
5447 ptr = (unsigned *)&session->sess_id.data[0];
5448 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5449 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5450out:
5451 dprintk("<-- %s\n", __func__);
5452 return status;
5453}
5454
5455/*
5456 * Issue the over-the-wire RPC DESTROY_SESSION.
5457 * The caller must serialize access to this routine.
5458 */
5459int nfs4_proc_destroy_session(struct nfs4_session *session)
5460{
5461 int status = 0;
5462 struct rpc_message msg;
5463
5464 dprintk("--> nfs4_proc_destroy_session\n");
5465
5466 /* session is still being setup */
5467 if (session->clp->cl_cons_state != NFS_CS_READY)
5468 return status;
5469
5470 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5471 msg.rpc_argp = session;
5472 msg.rpc_resp = NULL;
5473 msg.rpc_cred = NULL;
5474 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5475
5476 if (status)
5477 printk(KERN_WARNING
5478 "NFS: Got error %d from the server on DESTROY_SESSION. "
5479 "Session has been destroyed regardless...\n", status);
5480
5481 dprintk("<-- nfs4_proc_destroy_session\n");
5482 return status;
5483}
5484
5485int nfs4_init_session(struct nfs_server *server)
5486{
5487 struct nfs_client *clp = server->nfs_client;
5488 struct nfs4_session *session;
5489 unsigned int rsize, wsize;
5490 int ret;
5491
5492 if (!nfs4_has_session(clp))
5493 return 0;
5494
5495 session = clp->cl_session;
5496 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5497 return 0;
5498
5499 rsize = server->rsize;
5500 if (rsize == 0)
5501 rsize = NFS_MAX_FILE_IO_SIZE;
5502 wsize = server->wsize;
5503 if (wsize == 0)
5504 wsize = NFS_MAX_FILE_IO_SIZE;
5505
5506 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5507 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5508
5509 ret = nfs4_recover_expired_lease(server);
5510 if (!ret)
5511 ret = nfs4_check_client_ready(clp);
5512 return ret;
5513}
5514
5515int nfs4_init_ds_session(struct nfs_client *clp)
5516{
5517 struct nfs4_session *session = clp->cl_session;
5518 int ret;
5519
5520 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5521 return 0;
5522
5523 ret = nfs4_client_recover_expired_lease(clp);
5524 if (!ret)
5525 /* Test for the DS role */
5526 if (!is_ds_client(clp))
5527 ret = -ENODEV;
5528 if (!ret)
5529 ret = nfs4_check_client_ready(clp);
5530 return ret;
5531
5532}
5533EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5534
5535
5536/*
5537 * Renew the cl_session lease.
5538 */
5539struct nfs4_sequence_data {
5540 struct nfs_client *clp;
5541 struct nfs4_sequence_args args;
5542 struct nfs4_sequence_res res;
5543};
5544
5545static void nfs41_sequence_release(void *data)
5546{
5547 struct nfs4_sequence_data *calldata = data;
5548 struct nfs_client *clp = calldata->clp;
5549
5550 if (atomic_read(&clp->cl_count) > 1)
5551 nfs4_schedule_state_renewal(clp);
5552 nfs_put_client(clp);
5553 kfree(calldata);
5554}
5555
5556static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5557{
5558 switch(task->tk_status) {
5559 case -NFS4ERR_DELAY:
5560 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5561 return -EAGAIN;
5562 default:
5563 nfs4_schedule_lease_recovery(clp);
5564 }
5565 return 0;
5566}
5567
5568static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5569{
5570 struct nfs4_sequence_data *calldata = data;
5571 struct nfs_client *clp = calldata->clp;
5572
5573 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5574 return;
5575
5576 if (task->tk_status < 0) {
5577 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5578 if (atomic_read(&clp->cl_count) == 1)
5579 goto out;
5580
5581 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5582 rpc_restart_call_prepare(task);
5583 return;
5584 }
5585 }
5586 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5587out:
5588 dprintk("<-- %s\n", __func__);
5589}
5590
5591static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5592{
5593 struct nfs4_sequence_data *calldata = data;
5594 struct nfs_client *clp = calldata->clp;
5595 struct nfs4_sequence_args *args;
5596 struct nfs4_sequence_res *res;
5597
5598 args = task->tk_msg.rpc_argp;
5599 res = task->tk_msg.rpc_resp;
5600
5601 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5602 return;
5603 rpc_call_start(task);
5604}
5605
5606static const struct rpc_call_ops nfs41_sequence_ops = {
5607 .rpc_call_done = nfs41_sequence_call_done,
5608 .rpc_call_prepare = nfs41_sequence_prepare,
5609 .rpc_release = nfs41_sequence_release,
5610};
5611
5612static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5613{
5614 struct nfs4_sequence_data *calldata;
5615 struct rpc_message msg = {
5616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5617 .rpc_cred = cred,
5618 };
5619 struct rpc_task_setup task_setup_data = {
5620 .rpc_client = clp->cl_rpcclient,
5621 .rpc_message = &msg,
5622 .callback_ops = &nfs41_sequence_ops,
5623 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5624 };
5625
5626 if (!atomic_inc_not_zero(&clp->cl_count))
5627 return ERR_PTR(-EIO);
5628 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5629 if (calldata == NULL) {
5630 nfs_put_client(clp);
5631 return ERR_PTR(-ENOMEM);
5632 }
5633 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5634 msg.rpc_argp = &calldata->args;
5635 msg.rpc_resp = &calldata->res;
5636 calldata->clp = clp;
5637 task_setup_data.callback_data = calldata;
5638
5639 return rpc_run_task(&task_setup_data);
5640}
5641
5642static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5643{
5644 struct rpc_task *task;
5645 int ret = 0;
5646
5647 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5648 return 0;
5649 task = _nfs41_proc_sequence(clp, cred);
5650 if (IS_ERR(task))
5651 ret = PTR_ERR(task);
5652 else
5653 rpc_put_task_async(task);
5654 dprintk("<-- %s status=%d\n", __func__, ret);
5655 return ret;
5656}
5657
5658static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5659{
5660 struct rpc_task *task;
5661 int ret;
5662
5663 task = _nfs41_proc_sequence(clp, cred);
5664 if (IS_ERR(task)) {
5665 ret = PTR_ERR(task);
5666 goto out;
5667 }
5668 ret = rpc_wait_for_completion_task(task);
5669 if (!ret) {
5670 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5671
5672 if (task->tk_status == 0)
5673 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5674 ret = task->tk_status;
5675 }
5676 rpc_put_task(task);
5677out:
5678 dprintk("<-- %s status=%d\n", __func__, ret);
5679 return ret;
5680}
5681
5682struct nfs4_reclaim_complete_data {
5683 struct nfs_client *clp;
5684 struct nfs41_reclaim_complete_args arg;
5685 struct nfs41_reclaim_complete_res res;
5686};
5687
5688static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5689{
5690 struct nfs4_reclaim_complete_data *calldata = data;
5691
5692 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5693 if (nfs41_setup_sequence(calldata->clp->cl_session,
5694 &calldata->arg.seq_args,
5695 &calldata->res.seq_res, task))
5696 return;
5697
5698 rpc_call_start(task);
5699}
5700
5701static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5702{
5703 switch(task->tk_status) {
5704 case 0:
5705 case -NFS4ERR_COMPLETE_ALREADY:
5706 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5707 break;
5708 case -NFS4ERR_DELAY:
5709 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5710 /* fall through */
5711 case -NFS4ERR_RETRY_UNCACHED_REP:
5712 return -EAGAIN;
5713 default:
5714 nfs4_schedule_lease_recovery(clp);
5715 }
5716 return 0;
5717}
5718
5719static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5720{
5721 struct nfs4_reclaim_complete_data *calldata = data;
5722 struct nfs_client *clp = calldata->clp;
5723 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5724
5725 dprintk("--> %s\n", __func__);
5726 if (!nfs41_sequence_done(task, res))
5727 return;
5728
5729 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5730 rpc_restart_call_prepare(task);
5731 return;
5732 }
5733 dprintk("<-- %s\n", __func__);
5734}
5735
5736static void nfs4_free_reclaim_complete_data(void *data)
5737{
5738 struct nfs4_reclaim_complete_data *calldata = data;
5739
5740 kfree(calldata);
5741}
5742
5743static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5744 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5745 .rpc_call_done = nfs4_reclaim_complete_done,
5746 .rpc_release = nfs4_free_reclaim_complete_data,
5747};
5748
5749/*
5750 * Issue a global reclaim complete.
5751 */
5752static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5753{
5754 struct nfs4_reclaim_complete_data *calldata;
5755 struct rpc_task *task;
5756 struct rpc_message msg = {
5757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5758 };
5759 struct rpc_task_setup task_setup_data = {
5760 .rpc_client = clp->cl_rpcclient,
5761 .rpc_message = &msg,
5762 .callback_ops = &nfs4_reclaim_complete_call_ops,
5763 .flags = RPC_TASK_ASYNC,
5764 };
5765 int status = -ENOMEM;
5766
5767 dprintk("--> %s\n", __func__);
5768 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5769 if (calldata == NULL)
5770 goto out;
5771 calldata->clp = clp;
5772 calldata->arg.one_fs = 0;
5773
5774 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5775 msg.rpc_argp = &calldata->arg;
5776 msg.rpc_resp = &calldata->res;
5777 task_setup_data.callback_data = calldata;
5778 task = rpc_run_task(&task_setup_data);
5779 if (IS_ERR(task)) {
5780 status = PTR_ERR(task);
5781 goto out;
5782 }
5783 status = nfs4_wait_for_completion_rpc_task(task);
5784 if (status == 0)
5785 status = task->tk_status;
5786 rpc_put_task(task);
5787 return 0;
5788out:
5789 dprintk("<-- %s status=%d\n", __func__, status);
5790 return status;
5791}
5792
5793static void
5794nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5795{
5796 struct nfs4_layoutget *lgp = calldata;
5797 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5798
5799 dprintk("--> %s\n", __func__);
5800 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5801 * right now covering the LAYOUTGET we are about to send.
5802 * However, that is not so catastrophic, and there seems
5803 * to be no way to prevent it completely.
5804 */
5805 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5806 &lgp->res.seq_res, task))
5807 return;
5808 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5809 NFS_I(lgp->args.inode)->layout,
5810 lgp->args.ctx->state)) {
5811 rpc_exit(task, NFS4_OK);
5812 return;
5813 }
5814 rpc_call_start(task);
5815}
5816
5817static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5818{
5819 struct nfs4_layoutget *lgp = calldata;
5820 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5821
5822 dprintk("--> %s\n", __func__);
5823
5824 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5825 return;
5826
5827 switch (task->tk_status) {
5828 case 0:
5829 break;
5830 case -NFS4ERR_LAYOUTTRYLATER:
5831 case -NFS4ERR_RECALLCONFLICT:
5832 task->tk_status = -NFS4ERR_DELAY;
5833 /* Fall through */
5834 default:
5835 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5836 rpc_restart_call_prepare(task);
5837 return;
5838 }
5839 }
5840 dprintk("<-- %s\n", __func__);
5841}
5842
5843static void nfs4_layoutget_release(void *calldata)
5844{
5845 struct nfs4_layoutget *lgp = calldata;
5846
5847 dprintk("--> %s\n", __func__);
5848 put_nfs_open_context(lgp->args.ctx);
5849 kfree(calldata);
5850 dprintk("<-- %s\n", __func__);
5851}
5852
5853static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5854 .rpc_call_prepare = nfs4_layoutget_prepare,
5855 .rpc_call_done = nfs4_layoutget_done,
5856 .rpc_release = nfs4_layoutget_release,
5857};
5858
5859int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5860{
5861 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5862 struct rpc_task *task;
5863 struct rpc_message msg = {
5864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5865 .rpc_argp = &lgp->args,
5866 .rpc_resp = &lgp->res,
5867 };
5868 struct rpc_task_setup task_setup_data = {
5869 .rpc_client = server->client,
5870 .rpc_message = &msg,
5871 .callback_ops = &nfs4_layoutget_call_ops,
5872 .callback_data = lgp,
5873 .flags = RPC_TASK_ASYNC,
5874 };
5875 int status = 0;
5876
5877 dprintk("--> %s\n", __func__);
5878
5879 lgp->res.layoutp = &lgp->args.layout;
5880 lgp->res.seq_res.sr_slot = NULL;
5881 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5882 task = rpc_run_task(&task_setup_data);
5883 if (IS_ERR(task))
5884 return PTR_ERR(task);
5885 status = nfs4_wait_for_completion_rpc_task(task);
5886 if (status == 0)
5887 status = task->tk_status;
5888 if (status == 0)
5889 status = pnfs_layout_process(lgp);
5890 rpc_put_task(task);
5891 dprintk("<-- %s status=%d\n", __func__, status);
5892 return status;
5893}
5894
5895static void
5896nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5897{
5898 struct nfs4_layoutreturn *lrp = calldata;
5899
5900 dprintk("--> %s\n", __func__);
5901 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5902 &lrp->res.seq_res, task))
5903 return;
5904 rpc_call_start(task);
5905}
5906
5907static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5908{
5909 struct nfs4_layoutreturn *lrp = calldata;
5910 struct nfs_server *server;
5911 struct pnfs_layout_hdr *lo = lrp->args.layout;
5912
5913 dprintk("--> %s\n", __func__);
5914
5915 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5916 return;
5917
5918 server = NFS_SERVER(lrp->args.inode);
5919 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5920 rpc_restart_call_prepare(task);
5921 return;
5922 }
5923 spin_lock(&lo->plh_inode->i_lock);
5924 if (task->tk_status == 0) {
5925 if (lrp->res.lrs_present) {
5926 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5927 } else
5928 BUG_ON(!list_empty(&lo->plh_segs));
5929 }
5930 lo->plh_block_lgets--;
5931 spin_unlock(&lo->plh_inode->i_lock);
5932 dprintk("<-- %s\n", __func__);
5933}
5934
5935static void nfs4_layoutreturn_release(void *calldata)
5936{
5937 struct nfs4_layoutreturn *lrp = calldata;
5938
5939 dprintk("--> %s\n", __func__);
5940 put_layout_hdr(lrp->args.layout);
5941 kfree(calldata);
5942 dprintk("<-- %s\n", __func__);
5943}
5944
5945static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5946 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5947 .rpc_call_done = nfs4_layoutreturn_done,
5948 .rpc_release = nfs4_layoutreturn_release,
5949};
5950
5951int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5952{
5953 struct rpc_task *task;
5954 struct rpc_message msg = {
5955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5956 .rpc_argp = &lrp->args,
5957 .rpc_resp = &lrp->res,
5958 };
5959 struct rpc_task_setup task_setup_data = {
5960 .rpc_client = lrp->clp->cl_rpcclient,
5961 .rpc_message = &msg,
5962 .callback_ops = &nfs4_layoutreturn_call_ops,
5963 .callback_data = lrp,
5964 };
5965 int status;
5966
5967 dprintk("--> %s\n", __func__);
5968 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5969 task = rpc_run_task(&task_setup_data);
5970 if (IS_ERR(task))
5971 return PTR_ERR(task);
5972 status = task->tk_status;
5973 dprintk("<-- %s status=%d\n", __func__, status);
5974 rpc_put_task(task);
5975 return status;
5976}
5977
5978/*
5979 * Retrieve the list of Data Server devices from the MDS.
5980 */
5981static int _nfs4_getdevicelist(struct nfs_server *server,
5982 const struct nfs_fh *fh,
5983 struct pnfs_devicelist *devlist)
5984{
5985 struct nfs4_getdevicelist_args args = {
5986 .fh = fh,
5987 .layoutclass = server->pnfs_curr_ld->id,
5988 };
5989 struct nfs4_getdevicelist_res res = {
5990 .devlist = devlist,
5991 };
5992 struct rpc_message msg = {
5993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5994 .rpc_argp = &args,
5995 .rpc_resp = &res,
5996 };
5997 int status;
5998
5999 dprintk("--> %s\n", __func__);
6000 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6001 &res.seq_res, 0);
6002 dprintk("<-- %s status=%d\n", __func__, status);
6003 return status;
6004}
6005
6006int nfs4_proc_getdevicelist(struct nfs_server *server,
6007 const struct nfs_fh *fh,
6008 struct pnfs_devicelist *devlist)
6009{
6010 struct nfs4_exception exception = { };
6011 int err;
6012
6013 do {
6014 err = nfs4_handle_exception(server,
6015 _nfs4_getdevicelist(server, fh, devlist),
6016 &exception);
6017 } while (exception.retry);
6018
6019 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6020 err, devlist->num_devs);
6021
6022 return err;
6023}
6024EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6025
6026static int
6027_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6028{
6029 struct nfs4_getdeviceinfo_args args = {
6030 .pdev = pdev,
6031 };
6032 struct nfs4_getdeviceinfo_res res = {
6033 .pdev = pdev,
6034 };
6035 struct rpc_message msg = {
6036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6037 .rpc_argp = &args,
6038 .rpc_resp = &res,
6039 };
6040 int status;
6041
6042 dprintk("--> %s\n", __func__);
6043 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6044 dprintk("<-- %s status=%d\n", __func__, status);
6045
6046 return status;
6047}
6048
6049int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6050{
6051 struct nfs4_exception exception = { };
6052 int err;
6053
6054 do {
6055 err = nfs4_handle_exception(server,
6056 _nfs4_proc_getdeviceinfo(server, pdev),
6057 &exception);
6058 } while (exception.retry);
6059 return err;
6060}
6061EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6062
6063static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6064{
6065 struct nfs4_layoutcommit_data *data = calldata;
6066 struct nfs_server *server = NFS_SERVER(data->args.inode);
6067
6068 if (nfs4_setup_sequence(server, &data->args.seq_args,
6069 &data->res.seq_res, task))
6070 return;
6071 rpc_call_start(task);
6072}
6073
6074static void
6075nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6076{
6077 struct nfs4_layoutcommit_data *data = calldata;
6078 struct nfs_server *server = NFS_SERVER(data->args.inode);
6079
6080 if (!nfs4_sequence_done(task, &data->res.seq_res))
6081 return;
6082
6083 switch (task->tk_status) { /* Just ignore these failures */
6084 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6085 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6086 case NFS4ERR_BADLAYOUT: /* no layout */
6087 case NFS4ERR_GRACE: /* loca_recalim always false */
6088 task->tk_status = 0;
6089 }
6090
6091 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6092 rpc_restart_call_prepare(task);
6093 return;
6094 }
6095
6096 if (task->tk_status == 0)
6097 nfs_post_op_update_inode_force_wcc(data->args.inode,
6098 data->res.fattr);
6099}
6100
6101static void nfs4_layoutcommit_release(void *calldata)
6102{
6103 struct nfs4_layoutcommit_data *data = calldata;
6104 struct pnfs_layout_segment *lseg, *tmp;
6105 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6106
6107 pnfs_cleanup_layoutcommit(data);
6108 /* Matched by references in pnfs_set_layoutcommit */
6109 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6110 list_del_init(&lseg->pls_lc_list);
6111 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6112 &lseg->pls_flags))
6113 put_lseg(lseg);
6114 }
6115
6116 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6117 smp_mb__after_clear_bit();
6118 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6119
6120 put_rpccred(data->cred);
6121 kfree(data);
6122}
6123
6124static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6125 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6126 .rpc_call_done = nfs4_layoutcommit_done,
6127 .rpc_release = nfs4_layoutcommit_release,
6128};
6129
6130int
6131nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6132{
6133 struct rpc_message msg = {
6134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6135 .rpc_argp = &data->args,
6136 .rpc_resp = &data->res,
6137 .rpc_cred = data->cred,
6138 };
6139 struct rpc_task_setup task_setup_data = {
6140 .task = &data->task,
6141 .rpc_client = NFS_CLIENT(data->args.inode),
6142 .rpc_message = &msg,
6143 .callback_ops = &nfs4_layoutcommit_ops,
6144 .callback_data = data,
6145 .flags = RPC_TASK_ASYNC,
6146 };
6147 struct rpc_task *task;
6148 int status = 0;
6149
6150 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6151 "lbw: %llu inode %lu\n",
6152 data->task.tk_pid, sync,
6153 data->args.lastbytewritten,
6154 data->args.inode->i_ino);
6155
6156 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6157 task = rpc_run_task(&task_setup_data);
6158 if (IS_ERR(task))
6159 return PTR_ERR(task);
6160 if (sync == false)
6161 goto out;
6162 status = nfs4_wait_for_completion_rpc_task(task);
6163 if (status != 0)
6164 goto out;
6165 status = task->tk_status;
6166out:
6167 dprintk("%s: status %d\n", __func__, status);
6168 rpc_put_task(task);
6169 return status;
6170}
6171
6172static int
6173_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6174 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6175{
6176 struct nfs41_secinfo_no_name_args args = {
6177 .style = SECINFO_STYLE_CURRENT_FH,
6178 };
6179 struct nfs4_secinfo_res res = {
6180 .flavors = flavors,
6181 };
6182 struct rpc_message msg = {
6183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6184 .rpc_argp = &args,
6185 .rpc_resp = &res,
6186 };
6187 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6188}
6189
6190static int
6191nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6192 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6193{
6194 struct nfs4_exception exception = { };
6195 int err;
6196 do {
6197 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6198 switch (err) {
6199 case 0:
6200 case -NFS4ERR_WRONGSEC:
6201 case -NFS4ERR_NOTSUPP:
6202 break;
6203 default:
6204 err = nfs4_handle_exception(server, err, &exception);
6205 }
6206 } while (exception.retry);
6207 return err;
6208}
6209
6210static int
6211nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6212 struct nfs_fsinfo *info)
6213{
6214 int err;
6215 struct page *page;
6216 rpc_authflavor_t flavor;
6217 struct nfs4_secinfo_flavors *flavors;
6218
6219 page = alloc_page(GFP_KERNEL);
6220 if (!page) {
6221 err = -ENOMEM;
6222 goto out;
6223 }
6224
6225 flavors = page_address(page);
6226 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6227
6228 /*
6229 * Fall back on "guess and check" method if
6230 * the server doesn't support SECINFO_NO_NAME
6231 */
6232 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6233 err = nfs4_find_root_sec(server, fhandle, info);
6234 goto out_freepage;
6235 }
6236 if (err)
6237 goto out_freepage;
6238
6239 flavor = nfs_find_best_sec(flavors);
6240 if (err == 0)
6241 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6242
6243out_freepage:
6244 put_page(page);
6245 if (err == -EACCES)
6246 return -EPERM;
6247out:
6248 return err;
6249}
6250
6251static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6252{
6253 int status;
6254 struct nfs41_test_stateid_args args = {
6255 .stateid = stateid,
6256 };
6257 struct nfs41_test_stateid_res res;
6258 struct rpc_message msg = {
6259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6260 .rpc_argp = &args,
6261 .rpc_resp = &res,
6262 };
6263
6264 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6265 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6266
6267 if (status == NFS_OK)
6268 return res.status;
6269 return status;
6270}
6271
6272static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6273{
6274 struct nfs4_exception exception = { };
6275 int err;
6276 do {
6277 err = nfs4_handle_exception(server,
6278 _nfs41_test_stateid(server, stateid),
6279 &exception);
6280 } while (exception.retry);
6281 return err;
6282}
6283
6284static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6285{
6286 struct nfs41_free_stateid_args args = {
6287 .stateid = stateid,
6288 };
6289 struct nfs41_free_stateid_res res;
6290 struct rpc_message msg = {
6291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6292 .rpc_argp = &args,
6293 .rpc_resp = &res,
6294 };
6295
6296 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6297 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6298}
6299
6300static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6301{
6302 struct nfs4_exception exception = { };
6303 int err;
6304 do {
6305 err = nfs4_handle_exception(server,
6306 _nfs4_free_stateid(server, stateid),
6307 &exception);
6308 } while (exception.retry);
6309 return err;
6310}
6311
6312static bool nfs41_match_stateid(const nfs4_stateid *s1,
6313 const nfs4_stateid *s2)
6314{
6315 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6316 return false;
6317
6318 if (s1->seqid == s2->seqid)
6319 return true;
6320 if (s1->seqid == 0 || s2->seqid == 0)
6321 return true;
6322
6323 return false;
6324}
6325
6326#endif /* CONFIG_NFS_V4_1 */
6327
6328static bool nfs4_match_stateid(const nfs4_stateid *s1,
6329 const nfs4_stateid *s2)
6330{
6331 return nfs4_stateid_match(s1, s2);
6332}
6333
6334
6335static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6336 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6337 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6338 .recover_open = nfs4_open_reclaim,
6339 .recover_lock = nfs4_lock_reclaim,
6340 .establish_clid = nfs4_init_clientid,
6341 .get_clid_cred = nfs4_get_setclientid_cred,
6342};
6343
6344#if defined(CONFIG_NFS_V4_1)
6345static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6346 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6347 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6348 .recover_open = nfs4_open_reclaim,
6349 .recover_lock = nfs4_lock_reclaim,
6350 .establish_clid = nfs41_init_clientid,
6351 .get_clid_cred = nfs4_get_exchange_id_cred,
6352 .reclaim_complete = nfs41_proc_reclaim_complete,
6353};
6354#endif /* CONFIG_NFS_V4_1 */
6355
6356static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6357 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6358 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6359 .recover_open = nfs4_open_expired,
6360 .recover_lock = nfs4_lock_expired,
6361 .establish_clid = nfs4_init_clientid,
6362 .get_clid_cred = nfs4_get_setclientid_cred,
6363};
6364
6365#if defined(CONFIG_NFS_V4_1)
6366static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6367 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6368 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6369 .recover_open = nfs41_open_expired,
6370 .recover_lock = nfs41_lock_expired,
6371 .establish_clid = nfs41_init_clientid,
6372 .get_clid_cred = nfs4_get_exchange_id_cred,
6373};
6374#endif /* CONFIG_NFS_V4_1 */
6375
6376static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6377 .sched_state_renewal = nfs4_proc_async_renew,
6378 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6379 .renew_lease = nfs4_proc_renew,
6380};
6381
6382#if defined(CONFIG_NFS_V4_1)
6383static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6384 .sched_state_renewal = nfs41_proc_async_sequence,
6385 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6386 .renew_lease = nfs4_proc_sequence,
6387};
6388#endif
6389
6390static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6391 .minor_version = 0,
6392 .call_sync = _nfs4_call_sync,
6393 .match_stateid = nfs4_match_stateid,
6394 .find_root_sec = nfs4_find_root_sec,
6395 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6396 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6397 .state_renewal_ops = &nfs40_state_renewal_ops,
6398};
6399
6400#if defined(CONFIG_NFS_V4_1)
6401static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6402 .minor_version = 1,
6403 .call_sync = _nfs4_call_sync_session,
6404 .match_stateid = nfs41_match_stateid,
6405 .find_root_sec = nfs41_find_root_sec,
6406 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6407 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6408 .state_renewal_ops = &nfs41_state_renewal_ops,
6409};
6410#endif
6411
6412const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6413 [0] = &nfs_v4_0_minor_ops,
6414#if defined(CONFIG_NFS_V4_1)
6415 [1] = &nfs_v4_1_minor_ops,
6416#endif
6417};
6418
6419static const struct inode_operations nfs4_file_inode_operations = {
6420 .permission = nfs_permission,
6421 .getattr = nfs_getattr,
6422 .setattr = nfs_setattr,
6423 .getxattr = generic_getxattr,
6424 .setxattr = generic_setxattr,
6425 .listxattr = generic_listxattr,
6426 .removexattr = generic_removexattr,
6427};
6428
6429const struct nfs_rpc_ops nfs_v4_clientops = {
6430 .version = 4, /* protocol version */
6431 .dentry_ops = &nfs4_dentry_operations,
6432 .dir_inode_ops = &nfs4_dir_inode_operations,
6433 .file_inode_ops = &nfs4_file_inode_operations,
6434 .file_ops = &nfs4_file_operations,
6435 .getroot = nfs4_proc_get_root,
6436 .getattr = nfs4_proc_getattr,
6437 .setattr = nfs4_proc_setattr,
6438 .lookup = nfs4_proc_lookup,
6439 .access = nfs4_proc_access,
6440 .readlink = nfs4_proc_readlink,
6441 .create = nfs4_proc_create,
6442 .remove = nfs4_proc_remove,
6443 .unlink_setup = nfs4_proc_unlink_setup,
6444 .unlink_done = nfs4_proc_unlink_done,
6445 .rename = nfs4_proc_rename,
6446 .rename_setup = nfs4_proc_rename_setup,
6447 .rename_done = nfs4_proc_rename_done,
6448 .link = nfs4_proc_link,
6449 .symlink = nfs4_proc_symlink,
6450 .mkdir = nfs4_proc_mkdir,
6451 .rmdir = nfs4_proc_remove,
6452 .readdir = nfs4_proc_readdir,
6453 .mknod = nfs4_proc_mknod,
6454 .statfs = nfs4_proc_statfs,
6455 .fsinfo = nfs4_proc_fsinfo,
6456 .pathconf = nfs4_proc_pathconf,
6457 .set_capabilities = nfs4_server_capabilities,
6458 .decode_dirent = nfs4_decode_dirent,
6459 .read_setup = nfs4_proc_read_setup,
6460 .read_done = nfs4_read_done,
6461 .write_setup = nfs4_proc_write_setup,
6462 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6463 .write_done = nfs4_write_done,
6464 .commit_setup = nfs4_proc_commit_setup,
6465 .commit_done = nfs4_commit_done,
6466 .lock = nfs4_proc_lock,
6467 .clear_acl_cache = nfs4_zap_acl_attr,
6468 .close_context = nfs4_close_context,
6469 .open_context = nfs4_atomic_open,
6470 .init_client = nfs4_init_client,
6471 .secinfo = nfs4_proc_secinfo,
6472};
6473
6474static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6475 .prefix = XATTR_NAME_NFSV4_ACL,
6476 .list = nfs4_xattr_list_nfs4_acl,
6477 .get = nfs4_xattr_get_nfs4_acl,
6478 .set = nfs4_xattr_set_nfs4_acl,
6479};
6480
6481const struct xattr_handler *nfs4_xattr_handlers[] = {
6482 &nfs4_xattr_nfs4_acl_handler,
6483 NULL
6484};
6485
6486module_param(max_session_slots, ushort, 0644);
6487MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6488 "requests the client will negotiate");
6489
6490/*
6491 * Local variables:
6492 * c-basic-offset: 8
6493 * End:
6494 */
Linux 6.x block layer and io_uring tree(s)