4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
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>
62 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
75 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
78 static int _nfs4_proc_open(struct nfs4_opendata *data);
79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
84 static 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
88 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
91 /* Prevent leaks of NFSv4 errors into userland */
92 static int nfs4_map_errors(int err)
97 case -NFS4ERR_RESOURCE:
99 case -NFS4ERR_WRONGSEC:
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
105 dprintk("%s could not handle NFSv4 error %d\n",
113 * This is our standard bitmap for GETATTR requests.
115 const u32 nfs4_fattr_bitmap[2] = {
117 | FATTR4_WORD0_CHANGE
120 | FATTR4_WORD0_FILEID,
122 | FATTR4_WORD1_NUMLINKS
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
132 const 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
141 const u32 nfs4_pathconf_bitmap[2] = {
143 | FATTR4_WORD0_MAXNAME,
147 const 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
156 const u32 nfs4_fs_locations_bitmap[2] = {
158 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
164 | FATTR4_WORD1_NUMLINKS
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
175 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
176 struct nfs4_readdir_arg *readdir)
180 BUG_ON(readdir->count < 80);
182 readdir->cookie = cookie;
183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
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
199 start = p = kmap_atomic(*readdir->pages);
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 */
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));
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 */
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));
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
227 kunmap_atomic(start);
230 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
237 nfs_wait_bit_killable, TASK_KILLABLE);
241 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
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))
258 /* This is the error handling routine for processes that are allowed
261 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
263 struct nfs_client *clp = server->nfs_client;
264 struct nfs4_state *state = exception->state;
265 struct inode *inode = exception->inode;
268 exception->retry = 0;
272 case -NFS4ERR_OPENMODE:
273 if (nfs_have_delegation(inode, FMODE_READ)) {
274 nfs_inode_return_delegation(inode);
275 exception->retry = 1;
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:
286 nfs_remove_bad_delegation(state->inode);
289 nfs4_schedule_stateid_recovery(server, state);
290 goto wait_on_recovery;
291 case -NFS4ERR_EXPIRED:
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__,
308 nfs4_schedule_session_recovery(clp->cl_session);
309 exception->retry = 1;
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
323 ret = nfs4_delay(server->client, &exception->timeout);
326 case -NFS4ERR_RETRY_UNCACHED_REP:
327 case -NFS4ERR_OLD_STATEID:
328 exception->retry = 1;
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 "
339 "Reenabling the idmapper.\n",
340 server->nfs_client->cl_hostname);
343 /* We failed to handle the error */
344 return nfs4_map_errors(ret);
346 ret = nfs4_wait_clnt_recover(clp);
348 exception->retry = 1;
353 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
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);
361 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
363 do_renew_lease(server->nfs_client, timestamp);
366 #if defined(CONFIG_NFS_V4_1)
369 * nfs4_free_slot - free a slot and efficiently update slot table.
371 * freeing a slot is trivially done by clearing its respective bit
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.
381 * Must be called while holding tbl->slot_tbl_lock
384 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
386 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
387 /* clear used bit in bitmap */
388 __clear_bit(slotid, tbl->used_slots);
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;
396 tbl->highest_used_slotid = NFS4_NO_SLOT;
398 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
399 slotid, tbl->highest_used_slotid);
402 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
404 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
409 * Signal state manager thread if session fore channel is drained
411 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
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);
419 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
422 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
423 complete(&ses->fc_slot_table.complete);
427 * Signal state manager thread if session back channel is drained
429 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
431 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
432 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
434 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
435 complete(&ses->bc_slot_table.complete);
438 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
440 struct nfs4_slot_table *tbl;
442 tbl = &res->sr_session->fc_slot_table;
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__);
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);
457 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
459 unsigned long timestamp;
460 struct nfs_client *clp;
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
468 if (res->sr_status == 1)
469 res->sr_status = NFS_OK;
471 /* don't increment the sequence number if the task wasn't sent */
472 if (!RPC_WAS_SENT(task))
475 /* Check the SEQUENCE operation status */
476 switch (res->sr_status) {
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);
488 /* The server detected a resend of the RPC call and
489 * returned NFS4ERR_DELAY as per Section 2.10.6.2
492 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
494 res->sr_slot - res->sr_session->fc_slot_table.slots,
495 res->sr_slot->seq_nr);
498 /* Just update the slot sequence no. */
499 ++res->sr_slot->seq_nr;
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);
507 if (!rpc_restart_call(task))
509 rpc_delay(task, NFS4_POLL_RETRY_MAX);
513 static int nfs4_sequence_done(struct rpc_task *task,
514 struct nfs4_sequence_res *res)
516 if (res->sr_session == NULL)
518 return nfs41_sequence_done(task, res);
522 * nfs4_find_slot - efficiently look for a free slot
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.
529 * Note: must be called with under the slot_tbl_lock.
532 nfs4_find_slot(struct nfs4_slot_table *tbl)
535 u32 ret_id = NFS4_NO_SLOT;
537 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
538 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
540 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
541 if (slotid >= tbl->max_slots)
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;
549 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
550 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
554 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res, int cache_reply)
557 args->sa_session = NULL;
558 args->sa_cache_this = 0;
560 args->sa_cache_this = 1;
561 res->sr_session = NULL;
565 int nfs41_setup_sequence(struct nfs4_session *session,
566 struct nfs4_sequence_args *args,
567 struct nfs4_sequence_res *res,
568 struct rpc_task *task)
570 struct nfs4_slot *slot;
571 struct nfs4_slot_table *tbl;
574 dprintk("--> %s\n", __func__);
575 /* slot already allocated? */
576 if (res->sr_slot != NULL)
579 tbl = &session->fc_slot_table;
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__);
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__);
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__);
606 spin_unlock(&tbl->slot_tbl_lock);
608 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
609 slot = tbl->slots + slotid;
610 args->sa_session = session;
611 args->sa_slotid = slotid;
613 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
615 res->sr_session = session;
617 res->sr_renewal_time = jiffies;
618 res->sr_status_flags = 0;
620 * sr_status is only set in decode_sequence, and so will remain
621 * set to 1 if an rpc level failure occurs.
626 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
628 int 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)
633 struct nfs4_session *session = nfs4_get_session(server);
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);
643 ret = nfs41_setup_sequence(session, args, res, task);
645 dprintk("<-- %s status=%d\n", __func__, ret);
649 struct 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;
655 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
657 struct nfs41_call_sync_data *data = calldata;
659 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
661 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
662 data->seq_res, task))
664 rpc_call_start(task);
667 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
669 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
670 nfs41_call_sync_prepare(task, calldata);
673 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
675 struct nfs41_call_sync_data *data = calldata;
677 nfs41_sequence_done(task, data->seq_res);
680 static 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,
685 static 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,
690 static 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,
698 struct rpc_task *task;
699 struct nfs41_call_sync_data data = {
700 .seq_server = server,
704 struct rpc_task_setup task_setup = {
707 .callback_ops = &nfs41_call_sync_ops,
708 .callback_data = &data
712 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
713 task = rpc_run_task(&task_setup);
717 ret = task->tk_status;
723 int _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,
730 nfs41_init_sequence(args, res, cache_reply);
731 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
736 void nfs41_init_sequence(struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res, int cache_reply)
741 static int nfs4_sequence_done(struct rpc_task *task,
742 struct nfs4_sequence_res *res)
746 #endif /* CONFIG_NFS_V4_1 */
748 int _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,
755 nfs41_init_sequence(args, res, cache_reply);
756 return rpc_call_sync(clnt, msg, 0);
760 int 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,
767 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
768 args, res, cache_reply);
771 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
773 struct nfs_inode *nfsi = NFS_I(dir);
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);
783 struct nfs4_opendata {
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;
794 struct dentry *dentry;
795 struct nfs4_state_owner *owner;
796 struct nfs4_state *state;
798 unsigned long timestamp;
799 unsigned int rpc_done : 1;
805 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
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);
817 static 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,
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;
827 p = kzalloc(sizeof(*p), gfp_mask);
830 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
831 if (p->o_arg.seqid == NULL)
833 nfs_sb_active(dentry->d_sb);
834 p->dentry = dget(dentry);
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) {
851 p->o_arg.u.attrs = &p->attrs;
852 memcpy(&p->attrs, attrs, sizeof(p->attrs));
855 verf[1] = current->pid;
856 memcpy(p->o_arg.u.verifier.data, verf,
857 sizeof(p->o_arg.u.verifier.data));
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);
872 static void nfs4_opendata_free(struct kref *kref)
874 struct nfs4_opendata *p = container_of(kref,
875 struct nfs4_opendata, kref);
876 struct super_block *sb = p->dentry->d_sb;
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);
885 nfs_fattr_free_names(&p->f_attr);
889 static void nfs4_opendata_put(struct nfs4_opendata *p)
892 kref_put(&p->kref, nfs4_opendata_free);
895 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
899 ret = rpc_wait_for_completion_task(task);
903 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
907 if (open_mode & (O_EXCL|O_TRUNC))
909 switch (mode & (FMODE_READ|FMODE_WRITE)) {
911 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
912 && state->n_rdonly != 0;
915 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
916 && state->n_wronly != 0;
918 case FMODE_READ|FMODE_WRITE:
919 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
920 && state->n_rdwr != 0;
926 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
928 if (delegation == NULL)
930 if ((delegation->type & fmode) != fmode)
932 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
934 nfs_mark_delegation_referenced(delegation);
938 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
947 case FMODE_READ|FMODE_WRITE:
950 nfs4_state_set_mode_locked(state, state->state | fmode);
953 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
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);
960 set_bit(NFS_O_RDONLY_STATE, &state->flags);
963 set_bit(NFS_O_WRONLY_STATE, &state->flags);
965 case FMODE_READ|FMODE_WRITE:
966 set_bit(NFS_O_RDWR_STATE, &state->flags);
970 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
972 write_seqlock(&state->seqlock);
973 nfs_set_open_stateid_locked(state, stateid, fmode);
974 write_sequnlock(&state->seqlock);
977 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
980 * Protect the call to nfs4_state_set_mode_locked and
981 * serialise the stateid update
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);
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);
996 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_delegation *deleg_cur;
1002 fmode &= (FMODE_READ|FMODE_WRITE);
1005 deleg_cur = rcu_dereference(nfsi->delegation);
1006 if (deleg_cur == NULL)
1009 spin_lock(&deleg_cur->lock);
1010 if (nfsi->delegation != deleg_cur ||
1011 (deleg_cur->type & fmode) != fmode)
1012 goto no_delegation_unlock;
1014 if (delegation == NULL)
1015 delegation = &deleg_cur->stateid;
1016 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1017 goto no_delegation_unlock;
1019 nfs_mark_delegation_referenced(deleg_cur);
1020 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1022 no_delegation_unlock:
1023 spin_unlock(&deleg_cur->lock);
1027 if (!ret && open_stateid != NULL) {
1028 __update_open_stateid(state, open_stateid, NULL, fmode);
1036 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1038 struct nfs_delegation *delegation;
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
1042 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1047 nfs_inode_return_delegation(inode);
1050 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
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;
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;
1068 spin_unlock(&state->owner->so_lock);
1071 delegation = rcu_dereference(nfsi->delegation);
1072 if (!can_open_delegated(delegation, fmode)) {
1076 /* Save the delegation */
1077 nfs4_stateid_copy(&stateid, &delegation->stateid);
1079 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1084 /* Try to update the stateid using the delegation */
1085 if (update_open_stateid(state, NULL, &stateid, fmode))
1086 goto out_return_state;
1089 return ERR_PTR(ret);
1091 atomic_inc(&state->count);
1095 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1097 struct inode *inode;
1098 struct nfs4_state *state = NULL;
1099 struct nfs_delegation *delegation;
1102 if (!data->rpc_done) {
1103 state = nfs4_try_open_cached(data);
1108 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1110 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1111 ret = PTR_ERR(inode);
1115 state = nfs4_get_open_state(inode, data->owner);
1118 if (data->o_res.delegation_type != 0) {
1119 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1120 int delegation_flags = 0;
1123 delegation = rcu_dereference(NFS_I(inode)->delegation);
1125 delegation_flags = delegation->flags;
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",
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1142 update_open_stateid(state, &data->o_res.stateid, NULL,
1150 return ERR_PTR(ret);
1153 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1155 struct nfs_inode *nfsi = NFS_I(state->inode);
1156 struct nfs_open_context *ctx;
1158 spin_lock(&state->inode->i_lock);
1159 list_for_each_entry(ctx, &nfsi->open_files, list) {
1160 if (ctx->state != state)
1162 get_nfs_open_context(ctx);
1163 spin_unlock(&state->inode->i_lock);
1166 spin_unlock(&state->inode->i_lock);
1167 return ERR_PTR(-ENOENT);
1170 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1172 struct nfs4_opendata *opendata;
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);
1182 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1184 struct nfs4_state *newstate;
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);
1195 newstate = nfs4_opendata_to_nfs4_state(opendata);
1196 if (IS_ERR(newstate))
1197 return PTR_ERR(newstate);
1198 nfs4_close_state(newstate, fmode);
1203 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1205 struct nfs4_state *newstate;
1208 /* memory barrier prior to reading state->n_* */
1209 clear_bit(NFS_DELEGATED_STATE, &state->flags);
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);
1216 if (newstate != state)
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);
1224 if (newstate != state)
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);
1232 if (newstate != state)
1236 * We may have performed cached opens for all three recoveries.
1237 * Check if we need to update the current stateid.
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);
1251 * reclaim state on the server after a reboot.
1253 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1255 struct nfs_delegation *delegation;
1256 struct nfs4_opendata *opendata;
1257 fmode_t delegation_type = 0;
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);
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;
1270 opendata->o_arg.u.delegation_type = delegation_type;
1271 status = nfs4_open_recover(opendata, state);
1272 nfs4_opendata_put(opendata);
1276 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1278 struct nfs_server *server = NFS_SERVER(state->inode);
1279 struct nfs4_exception exception = { };
1282 err = _nfs4_do_open_reclaim(ctx, state);
1283 if (err != -NFS4ERR_DELAY)
1285 nfs4_handle_exception(server, err, &exception);
1286 } while (exception.retry);
1290 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1292 struct nfs_open_context *ctx;
1295 ctx = nfs4_state_find_open_context(state);
1297 return PTR_ERR(ctx);
1298 ret = nfs4_do_open_reclaim(ctx, state);
1299 put_nfs_open_context(ctx);
1303 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1305 struct nfs4_opendata *opendata;
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);
1318 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1320 struct nfs4_exception exception = { };
1321 struct nfs_server *server = NFS_SERVER(state->inode);
1324 err = _nfs4_open_delegation_recall(ctx, state, stateid);
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);
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);
1345 * The show must go on: exit, but mark the
1346 * stateid as needing recovery.
1348 case -NFS4ERR_DELEG_REVOKED:
1349 case -NFS4ERR_ADMIN_REVOKED:
1350 case -NFS4ERR_BAD_STATEID:
1351 nfs_inode_find_state_and_recover(state->inode,
1353 nfs4_schedule_stateid_recovery(server, state);
1356 * User RPCSEC_GSS context has expired.
1357 * We cannot recover this stateid now, so
1358 * skip it and allow recovery thread to
1365 err = nfs4_handle_exception(server, err, &exception);
1366 } while (exception.retry);
1371 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1373 struct nfs4_opendata *data = calldata;
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);
1384 static void nfs4_open_confirm_release(void *calldata)
1386 struct nfs4_opendata *data = calldata;
1387 struct nfs4_state *state = NULL;
1389 /* If this request hasn't been cancelled, do nothing */
1390 if (data->cancelled == 0)
1392 /* In case of error, no cleanup! */
1393 if (!data->rpc_done)
1395 state = nfs4_opendata_to_nfs4_state(data);
1397 nfs4_close_state(state, data->o_arg.fmode);
1399 nfs4_opendata_put(data);
1402 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1403 .rpc_call_done = nfs4_open_confirm_done,
1404 .rpc_release = nfs4_open_confirm_release,
1408 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1410 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
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,
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,
1430 kref_get(&data->kref);
1432 data->rpc_status = 0;
1433 data->timestamp = jiffies;
1434 task = rpc_run_task(&task_setup_data);
1436 return PTR_ERR(task);
1437 status = nfs4_wait_for_completion_rpc_task(task);
1439 data->cancelled = 1;
1442 status = data->rpc_status;
1447 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state_owner *sp = data->owner;
1452 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1455 * Check if we still need to send an OPEN call, or if we can use
1456 * a delegation instead.
1458 if (data->state != NULL) {
1459 struct nfs_delegation *delegation;
1461 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
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;
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);
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))
1482 rpc_call_start(task);
1487 task->tk_action = NULL;
1491 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1493 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1494 nfs4_open_prepare(task, calldata);
1497 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1499 struct nfs4_opendata *data = calldata;
1501 data->rpc_status = task->tk_status;
1503 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1506 if (task->tk_status == 0) {
1507 switch (data->o_res.f_attr->mode & S_IFMT) {
1511 data->rpc_status = -ELOOP;
1514 data->rpc_status = -EISDIR;
1517 data->rpc_status = -ENOTDIR;
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);
1526 static void nfs4_open_release(void *calldata)
1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state *state = NULL;
1531 /* If this request hasn't been cancelled, do nothing */
1532 if (data->cancelled == 0)
1534 /* In case of error, no cleanup! */
1535 if (data->rpc_status != 0 || !data->rpc_done)
1537 /* In case we need an open_confirm, no cleanup! */
1538 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1540 state = nfs4_opendata_to_nfs4_state(data);
1542 nfs4_close_state(state, data->o_arg.fmode);
1544 nfs4_opendata_put(data);
1547 static 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,
1553 static 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,
1559 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
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],
1570 .rpc_cred = data->owner->so_cred,
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,
1582 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1583 kref_get(&data->kref);
1585 data->rpc_status = 0;
1586 data->cancelled = 0;
1588 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1589 task = rpc_run_task(&task_setup_data);
1591 return PTR_ERR(task);
1592 status = nfs4_wait_for_completion_rpc_task(task);
1594 data->cancelled = 1;
1597 status = data->rpc_status;
1603 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1605 struct inode *dir = data->dir->d_inode;
1606 struct nfs_openres *o_res = &data->o_res;
1609 status = nfs4_run_open_task(data, 1);
1610 if (status != 0 || !data->rpc_done)
1613 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1615 nfs_refresh_inode(dir, o_res->dir_attr);
1617 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1618 status = _nfs4_proc_open_confirm(data);
1627 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1629 static int _nfs4_proc_open(struct nfs4_opendata *data)
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;
1637 status = nfs4_run_open_task(data, 0);
1638 if (!data->rpc_done)
1641 if (status == -NFS4ERR_BADNAME &&
1642 !(o_arg->open_flags & O_CREAT))
1647 nfs_fattr_map_and_free_names(server, &data->f_attr);
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);
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);
1661 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1662 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1666 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1671 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1672 ret = nfs4_wait_clnt_recover(clp);
1675 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1676 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1678 nfs4_schedule_state_manager(clp);
1684 static int nfs4_recover_expired_lease(struct nfs_server *server)
1686 return nfs4_client_recover_expired_lease(server->nfs_client);
1691 * reclaim state on the server after a network partition.
1692 * Assumes caller holds the appropriate lock
1694 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1696 struct nfs4_opendata *opendata;
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);
1704 d_drop(ctx->dentry);
1705 nfs4_opendata_put(opendata);
1709 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1711 struct nfs_server *server = NFS_SERVER(state->inode);
1712 struct nfs4_exception exception = { };
1716 err = _nfs4_open_expired(ctx, state);
1720 case -NFS4ERR_GRACE:
1721 case -NFS4ERR_DELAY:
1722 nfs4_handle_exception(server, err, &exception);
1725 } while (exception.retry);
1730 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1732 struct nfs_open_context *ctx;
1735 ctx = nfs4_state_find_open_context(state);
1737 return PTR_ERR(ctx);
1738 ret = nfs4_do_open_expired(ctx, state);
1739 put_nfs_open_context(ctx);
1743 #if defined(CONFIG_NFS_V4_1)
1744 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1746 int status = NFS_OK;
1747 struct nfs_server *server = NFS_SERVER(state->inode);
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;
1759 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
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);
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);
1768 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1770 return nfs4_open_expired(sp, state);
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
1779 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1781 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1782 !(sattr->ia_valid & ATTR_ATIME_SET))
1783 sattr->ia_valid |= ATTR_ATIME;
1785 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1786 !(sattr->ia_valid & ATTR_MTIME_SET))
1787 sattr->ia_valid |= ATTR_MTIME;
1791 * Returns a referenced nfs4_state
1793 static 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)
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;
1801 /* Protect against reboot recovery conflicts */
1803 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1805 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1808 status = nfs4_recover_expired_lease(server);
1810 goto err_put_state_owner;
1811 if (dentry->d_inode != NULL)
1812 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1814 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1815 if (opendata == NULL)
1816 goto err_put_state_owner;
1818 if (dentry->d_inode != NULL)
1819 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1821 status = _nfs4_proc_open(opendata);
1823 goto err_opendata_put;
1825 state = nfs4_opendata_to_nfs4_state(opendata);
1826 status = PTR_ERR(state);
1828 goto err_opendata_put;
1829 if (server->caps & NFS_CAP_POSIX_LOCK)
1830 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1832 if (opendata->o_arg.open_flags & O_EXCL) {
1833 nfs4_exclusive_attrset(opendata, sattr);
1835 nfs_fattr_init(opendata->o_res.f_attr);
1836 status = nfs4_do_setattr(state->inode, cred,
1837 opendata->o_res.f_attr, sattr,
1840 nfs_setattr_update_inode(state->inode, sattr);
1841 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1843 nfs4_opendata_put(opendata);
1844 nfs4_put_state_owner(sp);
1848 nfs4_opendata_put(opendata);
1849 err_put_state_owner:
1850 nfs4_put_state_owner(sp);
1857 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1859 struct nfs4_exception exception = { };
1860 struct nfs4_state *res;
1864 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
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.
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...
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;
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.
1891 if (status == -NFS4ERR_BAD_STATEID) {
1892 exception.retry = 1;
1895 if (status == -EAGAIN) {
1896 /* We must have found a delegation */
1897 exception.retry = 1;
1900 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1901 status, &exception));
1902 } while (exception.retry);
1906 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1907 struct nfs_fattr *fattr, struct iattr *sattr,
1908 struct nfs4_state *state)
1910 struct nfs_server *server = NFS_SERVER(inode);
1911 struct nfs_setattrargs arg = {
1912 .fh = NFS_FH(inode),
1915 .bitmask = server->attr_bitmask,
1917 struct nfs_setattrres res = {
1921 struct rpc_message msg = {
1922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1927 unsigned long timestamp = jiffies;
1930 nfs_fattr_init(fattr);
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,
1937 /* Use that stateid */
1939 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
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);
1947 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1948 struct nfs_fattr *fattr, struct iattr *sattr,
1949 struct nfs4_state *state)
1951 struct nfs_server *server = NFS_SERVER(inode);
1952 struct nfs4_exception exception = {
1958 err = nfs4_handle_exception(server,
1959 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1961 } while (exception.retry);
1965 struct 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;
1976 static void nfs4_free_closedata(void *data)
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;
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);
1991 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
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);
2003 static void nfs4_close_done(struct rpc_task *task, void *data)
2005 struct nfs4_closedata *calldata = data;
2006 struct nfs4_state *state = calldata->state;
2007 struct nfs_server *server = NFS_SERVER(calldata->inode);
2009 dprintk("%s: begin!\n", __func__);
2010 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
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
2015 switch (task->tk_status) {
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);
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)
2032 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2033 rpc_restart_call_prepare(task);
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);
2040 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2042 struct nfs4_closedata *calldata = data;
2043 struct nfs4_state *state = calldata->state;
2046 dprintk("%s: begin!\n", __func__);
2047 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
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;
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;
2066 spin_unlock(&state->owner->so_lock);
2069 /* Note: exit _without_ calling nfs4_close_done */
2070 task->tk_action = NULL;
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,
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,
2091 rpc_call_start(task);
2093 dprintk("%s: done!\n", __func__);
2096 static 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,
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.
2111 * NOTE: Caller must be holding the sp->so_owner semaphore!
2113 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
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,
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,
2130 int status = -ENOMEM;
2132 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2133 if (calldata == NULL)
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);
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);
2157 return PTR_ERR(task);
2160 status = rpc_wait_for_completion_task(task);
2167 pnfs_roc_release(state->inode);
2168 nfs4_put_open_state(state);
2169 nfs4_put_state_owner(sp);
2173 static struct inode *
2174 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2176 struct nfs4_state *state;
2178 /* Protect against concurrent sillydeletes */
2179 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2181 return ERR_CAST(state);
2183 return igrab(state->inode);
2186 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2188 if (ctx->state == NULL)
2191 nfs4_close_sync(ctx->state, ctx->mode);
2193 nfs4_close_state(ctx->state, ctx->mode);
2196 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2198 struct nfs4_server_caps_arg args = {
2201 struct nfs4_server_caps_res res = {};
2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2209 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 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;
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;
2250 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2252 struct nfs4_exception exception = { };
2255 err = nfs4_handle_exception(server,
2256 _nfs4_server_capabilities(server, fhandle),
2258 } while (exception.retry);
2262 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2263 struct nfs_fsinfo *info)
2265 struct nfs4_lookup_root_arg args = {
2266 .bitmask = nfs4_fattr_bitmap,
2268 struct nfs4_lookup_res res = {
2270 .fattr = info->fattr,
2273 struct rpc_message msg = {
2274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2279 nfs_fattr_init(info->fattr);
2280 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2283 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2284 struct nfs_fsinfo *info)
2286 struct nfs4_exception exception = { };
2289 err = _nfs4_lookup_root(server, fhandle, info);
2292 case -NFS4ERR_WRONGSEC:
2295 err = nfs4_handle_exception(server, err, &exception);
2297 } while (exception.retry);
2301 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2302 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2304 struct rpc_auth *auth;
2307 auth = rpcauth_create(flavor, server->client);
2312 ret = nfs4_lookup_root(server, fhandle, info);
2317 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2318 struct nfs_fsinfo *info)
2320 int i, len, status = 0;
2321 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2323 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2324 flav_array[len] = RPC_AUTH_NULL;
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)
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.
2340 if (status == -EACCES)
2346 * get the file handle for the "/" directory on the server
2348 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2349 struct nfs_fsinfo *info)
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))
2355 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2356 * by nfs4_map_errors() as this function exits.
2358 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2360 status = nfs4_server_capabilities(server, fhandle);
2362 status = nfs4_do_fsinfo(server, fhandle, info);
2363 return nfs4_map_errors(status);
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
2371 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2372 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2374 int status = -ENOMEM;
2375 struct page *page = NULL;
2376 struct nfs4_fs_locations *locations = NULL;
2378 page = alloc_page(GFP_KERNEL);
2381 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2382 if (locations == NULL)
2385 status = nfs4_proc_fs_locations(dir, name, locations, page);
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);
2395 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2396 nfs_fixup_referral_attributes(&locations->fattr);
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));
2408 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2410 struct nfs4_getattr_arg args = {
2412 .bitmask = server->attr_bitmask,
2414 struct nfs4_getattr_res res = {
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2424 nfs_fattr_init(fattr);
2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2428 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2430 struct nfs4_exception exception = { };
2433 err = nfs4_handle_exception(server,
2434 _nfs4_proc_getattr(server, fhandle, fattr),
2436 } while (exception.retry);
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.
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.
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.
2455 * This will be fixed with VFS changes (lookup-intent).
2458 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2459 struct iattr *sattr)
2461 struct inode *inode = dentry->d_inode;
2462 struct rpc_cred *cred = NULL;
2463 struct nfs4_state *state = NULL;
2466 if (pnfs_ld_layoutret_on_setattr(inode))
2467 pnfs_return_layout(inode);
2469 nfs_fattr_init(fattr);
2471 /* Search for an existing open(O_WRITE) file */
2472 if (sattr->ia_valid & ATTR_FILE) {
2473 struct nfs_open_context *ctx;
2475 ctx = nfs_file_open_context(sattr->ia_file);
2482 /* Deal with open(O_TRUNC) */
2483 if (sattr->ia_valid & ATTR_OPEN)
2484 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2486 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2488 nfs_setattr_update_inode(inode, sattr);
2492 static 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)
2496 struct nfs_server *server = NFS_SERVER(dir);
2498 struct nfs4_lookup_arg args = {
2499 .bitmask = server->attr_bitmask,
2500 .dir_fh = NFS_FH(dir),
2503 struct nfs4_lookup_res res = {
2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2514 nfs_fattr_init(fattr);
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);
2522 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
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;
2532 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2533 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2535 struct nfs4_exception exception = { };
2540 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2542 case -NFS4ERR_BADNAME:
2544 case -NFS4ERR_MOVED:
2545 return nfs4_get_referral(dir, name, fattr, fhandle);
2546 case -NFS4ERR_WRONGSEC:
2547 nfs_fixup_secinfo_attributes(fattr, fhandle);
2549 err = nfs4_handle_exception(NFS_SERVER(dir),
2550 status, &exception);
2551 } while (exception.retry);
2555 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2557 struct nfs_server *server = NFS_SERVER(inode);
2558 struct nfs4_accessargs args = {
2559 .fh = NFS_FH(inode),
2560 .bitmask = server->cache_consistency_bitmask,
2562 struct nfs4_accessres res = {
2565 struct rpc_message msg = {
2566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2569 .rpc_cred = entry->cred,
2571 int mode = entry->mask;
2575 * Determine which access bits we want to ask for...
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;
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;
2591 res.fattr = nfs_alloc_fattr();
2592 if (res.fattr == NULL)
2595 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 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);
2606 nfs_free_fattr(res.fattr);
2610 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2612 struct nfs4_exception exception = { };
2615 err = nfs4_handle_exception(NFS_SERVER(inode),
2616 _nfs4_proc_access(inode, entry),
2618 } while (exception.retry);
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,
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
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.
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.
2646 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2647 unsigned int pgbase, unsigned int pglen)
2649 struct nfs4_readlink args = {
2650 .fh = NFS_FH(inode),
2655 struct nfs4_readlink_res res;
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2662 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2665 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2666 unsigned int pgbase, unsigned int pglen)
2668 struct nfs4_exception exception = { };
2671 err = nfs4_handle_exception(NFS_SERVER(inode),
2672 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2674 } while (exception.retry);
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.
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).
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.
2694 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2695 int flags, struct nfs_open_context *ctx)
2697 struct dentry *de = dentry;
2698 struct nfs4_state *state;
2699 struct rpc_cred *cred = NULL;
2708 sattr->ia_mode &= ~current_umask();
2709 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2711 if (IS_ERR(state)) {
2712 status = PTR_ERR(state);
2715 d_add(dentry, igrab(state->inode));
2716 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2720 nfs4_close_sync(state, fmode);
2725 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2727 struct nfs_server *server = NFS_SERVER(dir);
2728 struct nfs_removeargs args = {
2730 .name.len = name->len,
2731 .name.name = name->name,
2732 .bitmask = server->attr_bitmask,
2734 struct nfs_removeres res = {
2737 struct rpc_message msg = {
2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2742 int status = -ENOMEM;
2744 res.dir_attr = nfs_alloc_fattr();
2745 if (res.dir_attr == NULL)
2748 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2750 update_changeattr(dir, &res.cinfo);
2751 nfs_post_op_update_inode(dir, res.dir_attr);
2753 nfs_free_fattr(res.dir_attr);
2758 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2760 struct nfs4_exception exception = { };
2763 err = nfs4_handle_exception(NFS_SERVER(dir),
2764 _nfs4_proc_remove(dir, name),
2766 } while (exception.retry);
2770 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2772 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs_removeargs *args = msg->rpc_argp;
2774 struct nfs_removeres *res = msg->rpc_resp;
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);
2782 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2784 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2785 &data->args.seq_args,
2789 rpc_call_start(task);
2792 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2794 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2796 if (!nfs4_sequence_done(task, &res->seq_res))
2798 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2800 update_changeattr(dir, &res->cinfo);
2801 nfs_post_op_update_inode(dir, res->dir_attr);
2805 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2807 struct nfs_server *server = NFS_SERVER(dir);
2808 struct nfs_renameargs *arg = msg->rpc_argp;
2809 struct nfs_renameres *res = msg->rpc_resp;
2811 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2812 arg->bitmask = server->attr_bitmask;
2813 res->server = server;
2814 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2817 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2819 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2820 &data->args.seq_args,
2824 rpc_call_start(task);
2827 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2828 struct inode *new_dir)
2830 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2832 if (!nfs4_sequence_done(task, &res->seq_res))
2834 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2837 update_changeattr(old_dir, &res->old_cinfo);
2838 nfs_post_op_update_inode(old_dir, res->old_fattr);
2839 update_changeattr(new_dir, &res->new_cinfo);
2840 nfs_post_op_update_inode(new_dir, res->new_fattr);
2844 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2845 struct inode *new_dir, struct qstr *new_name)
2847 struct nfs_server *server = NFS_SERVER(old_dir);
2848 struct nfs_renameargs arg = {
2849 .old_dir = NFS_FH(old_dir),
2850 .new_dir = NFS_FH(new_dir),
2851 .old_name = old_name,
2852 .new_name = new_name,
2853 .bitmask = server->attr_bitmask,
2855 struct nfs_renameres res = {
2858 struct rpc_message msg = {
2859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2863 int status = -ENOMEM;
2865 res.old_fattr = nfs_alloc_fattr();
2866 res.new_fattr = nfs_alloc_fattr();
2867 if (res.old_fattr == NULL || res.new_fattr == NULL)
2870 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2872 update_changeattr(old_dir, &res.old_cinfo);
2873 nfs_post_op_update_inode(old_dir, res.old_fattr);
2874 update_changeattr(new_dir, &res.new_cinfo);
2875 nfs_post_op_update_inode(new_dir, res.new_fattr);
2878 nfs_free_fattr(res.new_fattr);
2879 nfs_free_fattr(res.old_fattr);
2883 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2884 struct inode *new_dir, struct qstr *new_name)
2886 struct nfs4_exception exception = { };
2889 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2890 _nfs4_proc_rename(old_dir, old_name,
2893 } while (exception.retry);
2897 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2899 struct nfs_server *server = NFS_SERVER(inode);
2900 struct nfs4_link_arg arg = {
2901 .fh = NFS_FH(inode),
2902 .dir_fh = NFS_FH(dir),
2904 .bitmask = server->attr_bitmask,
2906 struct nfs4_link_res res = {
2909 struct rpc_message msg = {
2910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2914 int status = -ENOMEM;
2916 res.fattr = nfs_alloc_fattr();
2917 res.dir_attr = nfs_alloc_fattr();
2918 if (res.fattr == NULL || res.dir_attr == NULL)
2921 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2923 update_changeattr(dir, &res.cinfo);
2924 nfs_post_op_update_inode(dir, res.dir_attr);
2925 nfs_post_op_update_inode(inode, res.fattr);
2928 nfs_free_fattr(res.dir_attr);
2929 nfs_free_fattr(res.fattr);
2933 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2935 struct nfs4_exception exception = { };
2938 err = nfs4_handle_exception(NFS_SERVER(inode),
2939 _nfs4_proc_link(inode, dir, name),
2941 } while (exception.retry);
2945 struct nfs4_createdata {
2946 struct rpc_message msg;
2947 struct nfs4_create_arg arg;
2948 struct nfs4_create_res res;
2950 struct nfs_fattr fattr;
2951 struct nfs_fattr dir_fattr;
2954 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2955 struct qstr *name, struct iattr *sattr, u32 ftype)
2957 struct nfs4_createdata *data;
2959 data = kzalloc(sizeof(*data), GFP_KERNEL);
2961 struct nfs_server *server = NFS_SERVER(dir);
2963 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2964 data->msg.rpc_argp = &data->arg;
2965 data->msg.rpc_resp = &data->res;
2966 data->arg.dir_fh = NFS_FH(dir);
2967 data->arg.server = server;
2968 data->arg.name = name;
2969 data->arg.attrs = sattr;
2970 data->arg.ftype = ftype;
2971 data->arg.bitmask = server->attr_bitmask;
2972 data->res.server = server;
2973 data->res.fh = &data->fh;
2974 data->res.fattr = &data->fattr;
2975 data->res.dir_fattr = &data->dir_fattr;
2976 nfs_fattr_init(data->res.fattr);
2977 nfs_fattr_init(data->res.dir_fattr);
2982 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2984 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2985 &data->arg.seq_args, &data->res.seq_res, 1);
2987 update_changeattr(dir, &data->res.dir_cinfo);
2988 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2989 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2994 static void nfs4_free_createdata(struct nfs4_createdata *data)
2999 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3000 struct page *page, unsigned int len, struct iattr *sattr)
3002 struct nfs4_createdata *data;
3003 int status = -ENAMETOOLONG;
3005 if (len > NFS4_MAXPATHLEN)
3009 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3013 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3014 data->arg.u.symlink.pages = &page;
3015 data->arg.u.symlink.len = len;
3017 status = nfs4_do_create(dir, dentry, data);
3019 nfs4_free_createdata(data);
3024 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3025 struct page *page, unsigned int len, struct iattr *sattr)
3027 struct nfs4_exception exception = { };
3030 err = nfs4_handle_exception(NFS_SERVER(dir),
3031 _nfs4_proc_symlink(dir, dentry, page,
3034 } while (exception.retry);
3038 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3039 struct iattr *sattr)
3041 struct nfs4_createdata *data;
3042 int status = -ENOMEM;
3044 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3048 status = nfs4_do_create(dir, dentry, data);
3050 nfs4_free_createdata(data);
3055 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3056 struct iattr *sattr)
3058 struct nfs4_exception exception = { };
3061 sattr->ia_mode &= ~current_umask();
3063 err = nfs4_handle_exception(NFS_SERVER(dir),
3064 _nfs4_proc_mkdir(dir, dentry, sattr),
3066 } while (exception.retry);
3070 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3071 u64 cookie, struct page **pages, unsigned int count, int plus)
3073 struct inode *dir = dentry->d_inode;
3074 struct nfs4_readdir_arg args = {
3079 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3082 struct nfs4_readdir_res res;
3083 struct rpc_message msg = {
3084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3091 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3092 dentry->d_parent->d_name.name,
3093 dentry->d_name.name,
3094 (unsigned long long)cookie);
3095 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3096 res.pgbase = args.pgbase;
3097 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3099 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3100 status += args.pgbase;
3103 nfs_invalidate_atime(dir);
3105 dprintk("%s: returns %d\n", __func__, status);
3109 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3110 u64 cookie, struct page **pages, unsigned int count, int plus)
3112 struct nfs4_exception exception = { };
3115 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3116 _nfs4_proc_readdir(dentry, cred, cookie,
3117 pages, count, plus),
3119 } while (exception.retry);
3123 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3124 struct iattr *sattr, dev_t rdev)
3126 struct nfs4_createdata *data;
3127 int mode = sattr->ia_mode;
3128 int status = -ENOMEM;
3130 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3131 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3133 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3138 data->arg.ftype = NF4FIFO;
3139 else if (S_ISBLK(mode)) {
3140 data->arg.ftype = NF4BLK;
3141 data->arg.u.device.specdata1 = MAJOR(rdev);
3142 data->arg.u.device.specdata2 = MINOR(rdev);
3144 else if (S_ISCHR(mode)) {
3145 data->arg.ftype = NF4CHR;
3146 data->arg.u.device.specdata1 = MAJOR(rdev);
3147 data->arg.u.device.specdata2 = MINOR(rdev);
3150 status = nfs4_do_create(dir, dentry, data);
3152 nfs4_free_createdata(data);
3157 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3158 struct iattr *sattr, dev_t rdev)
3160 struct nfs4_exception exception = { };
3163 sattr->ia_mode &= ~current_umask();
3165 err = nfs4_handle_exception(NFS_SERVER(dir),
3166 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3168 } while (exception.retry);
3172 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3173 struct nfs_fsstat *fsstat)
3175 struct nfs4_statfs_arg args = {
3177 .bitmask = server->attr_bitmask,
3179 struct nfs4_statfs_res res = {
3182 struct rpc_message msg = {
3183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3188 nfs_fattr_init(fsstat->fattr);
3189 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3192 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3194 struct nfs4_exception exception = { };
3197 err = nfs4_handle_exception(server,
3198 _nfs4_proc_statfs(server, fhandle, fsstat),
3200 } while (exception.retry);
3204 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3205 struct nfs_fsinfo *fsinfo)
3207 struct nfs4_fsinfo_arg args = {
3209 .bitmask = server->attr_bitmask,
3211 struct nfs4_fsinfo_res res = {
3214 struct rpc_message msg = {
3215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3220 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3223 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3225 struct nfs4_exception exception = { };
3229 err = nfs4_handle_exception(server,
3230 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3232 } while (exception.retry);
3236 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3238 nfs_fattr_init(fsinfo->fattr);
3239 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3242 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3243 struct nfs_pathconf *pathconf)
3245 struct nfs4_pathconf_arg args = {
3247 .bitmask = server->attr_bitmask,
3249 struct nfs4_pathconf_res res = {
3250 .pathconf = pathconf,
3252 struct rpc_message msg = {
3253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3258 /* None of the pathconf attributes are mandatory to implement */
3259 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3260 memset(pathconf, 0, sizeof(*pathconf));
3264 nfs_fattr_init(pathconf->fattr);
3265 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3268 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3269 struct nfs_pathconf *pathconf)
3271 struct nfs4_exception exception = { };
3275 err = nfs4_handle_exception(server,
3276 _nfs4_proc_pathconf(server, fhandle, pathconf),
3278 } while (exception.retry);
3282 void __nfs4_read_done_cb(struct nfs_read_data *data)
3284 nfs_invalidate_atime(data->inode);
3287 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3289 struct nfs_server *server = NFS_SERVER(data->inode);
3291 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3292 rpc_restart_call_prepare(task);
3296 __nfs4_read_done_cb(data);
3297 if (task->tk_status > 0)
3298 renew_lease(server, data->timestamp);
3302 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3305 dprintk("--> %s\n", __func__);
3307 if (!nfs4_sequence_done(task, &data->res.seq_res))
3310 return data->read_done_cb ? data->read_done_cb(task, data) :
3311 nfs4_read_done_cb(task, data);
3314 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3316 data->timestamp = jiffies;
3317 data->read_done_cb = nfs4_read_done_cb;
3318 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3319 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3322 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3324 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3325 &data->args.seq_args,
3329 rpc_call_start(task);
3332 /* Reset the the nfs_read_data to send the read to the MDS. */
3333 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3335 dprintk("%s Reset task for i/o through\n", __func__);
3336 put_lseg(data->lseg);
3338 /* offsets will differ in the dense stripe case */
3339 data->args.offset = data->mds_offset;
3340 data->ds_clp = NULL;
3341 data->args.fh = NFS_FH(data->inode);
3342 data->read_done_cb = nfs4_read_done_cb;
3343 task->tk_ops = data->mds_ops;
3344 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3346 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3348 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3350 struct inode *inode = data->inode;
3352 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3353 rpc_restart_call_prepare(task);
3356 if (task->tk_status >= 0) {
3357 renew_lease(NFS_SERVER(inode), data->timestamp);
3358 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3363 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3365 if (!nfs4_sequence_done(task, &data->res.seq_res))
3367 return data->write_done_cb ? data->write_done_cb(task, data) :
3368 nfs4_write_done_cb(task, data);
3371 /* Reset the the nfs_write_data to send the write to the MDS. */
3372 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3374 dprintk("%s Reset task for i/o through\n", __func__);
3375 put_lseg(data->lseg);
3377 data->ds_clp = NULL;
3378 data->write_done_cb = nfs4_write_done_cb;
3379 data->args.fh = NFS_FH(data->inode);
3380 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3381 data->args.offset = data->mds_offset;
3382 data->res.fattr = &data->fattr;
3383 task->tk_ops = data->mds_ops;
3384 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3386 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3388 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3390 struct nfs_server *server = NFS_SERVER(data->inode);
3393 data->args.bitmask = NULL;
3394 data->res.fattr = NULL;
3396 data->args.bitmask = server->cache_consistency_bitmask;
3397 if (!data->write_done_cb)
3398 data->write_done_cb = nfs4_write_done_cb;
3399 data->res.server = server;
3400 data->timestamp = jiffies;
3402 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3403 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3406 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3408 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3409 &data->args.seq_args,
3413 rpc_call_start(task);
3416 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3418 struct inode *inode = data->inode;
3420 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3421 rpc_restart_call_prepare(task);
3424 nfs_refresh_inode(inode, data->res.fattr);
3428 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3430 if (!nfs4_sequence_done(task, &data->res.seq_res))
3432 return data->write_done_cb(task, data);
3435 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3437 struct nfs_server *server = NFS_SERVER(data->inode);
3440 data->args.bitmask = NULL;
3441 data->res.fattr = NULL;
3443 data->args.bitmask = server->cache_consistency_bitmask;
3444 if (!data->write_done_cb)
3445 data->write_done_cb = nfs4_commit_done_cb;
3446 data->res.server = server;
3447 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3448 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3451 struct nfs4_renewdata {
3452 struct nfs_client *client;
3453 unsigned long timestamp;
3457 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3458 * standalone procedure for queueing an asynchronous RENEW.
3460 static void nfs4_renew_release(void *calldata)
3462 struct nfs4_renewdata *data = calldata;
3463 struct nfs_client *clp = data->client;
3465 if (atomic_read(&clp->cl_count) > 1)
3466 nfs4_schedule_state_renewal(clp);
3467 nfs_put_client(clp);
3471 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3473 struct nfs4_renewdata *data = calldata;
3474 struct nfs_client *clp = data->client;
3475 unsigned long timestamp = data->timestamp;
3477 if (task->tk_status < 0) {
3478 /* Unless we're shutting down, schedule state recovery! */
3479 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3481 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3482 nfs4_schedule_lease_recovery(clp);
3485 nfs4_schedule_path_down_recovery(clp);
3487 do_renew_lease(clp, timestamp);
3490 static const struct rpc_call_ops nfs4_renew_ops = {
3491 .rpc_call_done = nfs4_renew_done,
3492 .rpc_release = nfs4_renew_release,
3495 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3497 struct rpc_message msg = {
3498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3502 struct nfs4_renewdata *data;
3504 if (renew_flags == 0)
3506 if (!atomic_inc_not_zero(&clp->cl_count))
3508 data = kmalloc(sizeof(*data), GFP_NOFS);
3512 data->timestamp = jiffies;
3513 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3514 &nfs4_renew_ops, data);
3517 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3519 struct rpc_message msg = {
3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3524 unsigned long now = jiffies;
3527 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3530 do_renew_lease(clp, now);
3534 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3536 return (server->caps & NFS_CAP_ACLS)
3537 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3538 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3541 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3542 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3545 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3547 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3548 struct page **pages, unsigned int *pgbase)
3550 struct page *newpage, **spages;
3556 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3557 newpage = alloc_page(GFP_KERNEL);
3559 if (newpage == NULL)
3561 memcpy(page_address(newpage), buf, len);
3566 } while (buflen != 0);
3572 __free_page(spages[rc-1]);
3576 struct nfs4_cached_acl {
3582 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3584 struct nfs_inode *nfsi = NFS_I(inode);
3586 spin_lock(&inode->i_lock);
3587 kfree(nfsi->nfs4_acl);
3588 nfsi->nfs4_acl = acl;
3589 spin_unlock(&inode->i_lock);
3592 static void nfs4_zap_acl_attr(struct inode *inode)
3594 nfs4_set_cached_acl(inode, NULL);
3597 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3599 struct nfs_inode *nfsi = NFS_I(inode);
3600 struct nfs4_cached_acl *acl;
3603 spin_lock(&inode->i_lock);
3604 acl = nfsi->nfs4_acl;
3607 if (buf == NULL) /* user is just asking for length */
3609 if (acl->cached == 0)
3611 ret = -ERANGE; /* see getxattr(2) man page */
3612 if (acl->len > buflen)
3614 memcpy(buf, acl->data, acl->len);
3618 spin_unlock(&inode->i_lock);
3622 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3624 struct nfs4_cached_acl *acl;
3626 if (buf && acl_len <= PAGE_SIZE) {
3627 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3631 memcpy(acl->data, buf, acl_len);
3633 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3640 nfs4_set_cached_acl(inode, acl);
3644 * The getxattr API returns the required buffer length when called with a
3645 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3646 * the required buf. On a NULL buf, we send a page of data to the server
3647 * guessing that the ACL request can be serviced by a page. If so, we cache
3648 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3649 * the cache. If not so, we throw away the page, and cache the required
3650 * length. The next getxattr call will then produce another round trip to
3651 * the server, this time with the input buf of the required size.
3653 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3655 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3656 struct nfs_getaclargs args = {
3657 .fh = NFS_FH(inode),
3661 struct nfs_getaclres res = {
3665 struct rpc_message msg = {
3666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3670 int ret = -ENOMEM, npages, i, acl_len = 0;
3672 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3673 /* As long as we're doing a round trip to the server anyway,
3674 * let's be prepared for a page of acl data. */
3678 for (i = 0; i < npages; i++) {
3679 pages[i] = alloc_page(GFP_KERNEL);
3684 /* for decoding across pages */
3685 res.acl_scratch = alloc_page(GFP_KERNEL);
3686 if (!res.acl_scratch)
3689 args.acl_len = npages * PAGE_SIZE;
3690 args.acl_pgbase = 0;
3691 /* Let decode_getfacl know not to fail if the ACL data is larger than
3692 * the page we send as a guess */
3694 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3695 resp_buf = page_address(pages[0]);
3697 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3698 __func__, buf, buflen, npages, args.acl_len);
3699 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3700 &msg, &args.seq_args, &res.seq_res, 0);
3704 acl_len = res.acl_len - res.acl_data_offset;
3705 if (acl_len > args.acl_len)
3706 nfs4_write_cached_acl(inode, NULL, acl_len);
3708 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3712 if (acl_len > buflen)
3714 _copy_from_pages(buf, pages, res.acl_data_offset,
3719 for (i = 0; i < npages; i++)
3721 __free_page(pages[i]);
3722 if (res.acl_scratch)
3723 __free_page(res.acl_scratch);
3727 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3729 struct nfs4_exception exception = { };
3732 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3735 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3736 } while (exception.retry);
3740 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3742 struct nfs_server *server = NFS_SERVER(inode);
3745 if (!nfs4_server_supports_acls(server))
3747 ret = nfs_revalidate_inode(server, inode);
3750 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3751 nfs_zap_acl_cache(inode);
3752 ret = nfs4_read_cached_acl(inode, buf, buflen);
3754 /* -ENOENT is returned if there is no ACL or if there is an ACL
3755 * but no cached acl data, just the acl length */
3757 return nfs4_get_acl_uncached(inode, buf, buflen);
3760 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3762 struct nfs_server *server = NFS_SERVER(inode);
3763 struct page *pages[NFS4ACL_MAXPAGES];
3764 struct nfs_setaclargs arg = {
3765 .fh = NFS_FH(inode),
3769 struct nfs_setaclres res;
3770 struct rpc_message msg = {
3771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3777 if (!nfs4_server_supports_acls(server))
3779 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3782 nfs_inode_return_delegation(inode);
3783 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3786 * Free each page after tx, so the only ref left is
3787 * held by the network stack
3790 put_page(pages[i-1]);
3793 * Acl update can result in inode attribute update.
3794 * so mark the attribute cache invalid.
3796 spin_lock(&inode->i_lock);
3797 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3798 spin_unlock(&inode->i_lock);
3799 nfs_access_zap_cache(inode);
3800 nfs_zap_acl_cache(inode);
3804 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3806 struct nfs4_exception exception = { };
3809 err = nfs4_handle_exception(NFS_SERVER(inode),
3810 __nfs4_proc_set_acl(inode, buf, buflen),
3812 } while (exception.retry);
3817 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3819 struct nfs_client *clp = server->nfs_client;
3821 if (task->tk_status >= 0)
3823 switch(task->tk_status) {
3824 case -NFS4ERR_DELEG_REVOKED:
3825 case -NFS4ERR_ADMIN_REVOKED:
3826 case -NFS4ERR_BAD_STATEID:
3828 nfs_remove_bad_delegation(state->inode);
3829 case -NFS4ERR_OPENMODE:
3832 nfs4_schedule_stateid_recovery(server, state);
3833 goto wait_on_recovery;
3834 case -NFS4ERR_EXPIRED:
3836 nfs4_schedule_stateid_recovery(server, state);
3837 case -NFS4ERR_STALE_STATEID:
3838 case -NFS4ERR_STALE_CLIENTID:
3839 nfs4_schedule_lease_recovery(clp);
3840 goto wait_on_recovery;
3841 #if defined(CONFIG_NFS_V4_1)
3842 case -NFS4ERR_BADSESSION:
3843 case -NFS4ERR_BADSLOT:
3844 case -NFS4ERR_BAD_HIGH_SLOT:
3845 case -NFS4ERR_DEADSESSION:
3846 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3847 case -NFS4ERR_SEQ_FALSE_RETRY:
3848 case -NFS4ERR_SEQ_MISORDERED:
3849 dprintk("%s ERROR %d, Reset session\n", __func__,
3851 nfs4_schedule_session_recovery(clp->cl_session);
3852 task->tk_status = 0;
3854 #endif /* CONFIG_NFS_V4_1 */
3855 case -NFS4ERR_DELAY:
3856 nfs_inc_server_stats(server, NFSIOS_DELAY);
3857 case -NFS4ERR_GRACE:
3859 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3860 task->tk_status = 0;
3862 case -NFS4ERR_RETRY_UNCACHED_REP:
3863 case -NFS4ERR_OLD_STATEID:
3864 task->tk_status = 0;
3867 task->tk_status = nfs4_map_errors(task->tk_status);
3870 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3871 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3872 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3873 task->tk_status = 0;
3877 static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3878 nfs4_verifier *bootverf)
3882 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3883 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3884 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3887 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3888 unsigned short port, struct rpc_cred *cred,
3889 struct nfs4_setclientid_res *res)
3891 nfs4_verifier sc_verifier;
3892 struct nfs4_setclientid setclientid = {
3893 .sc_verifier = &sc_verifier,
3895 .sc_cb_ident = clp->cl_cb_ident,
3897 struct rpc_message msg = {
3898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3899 .rpc_argp = &setclientid,
3906 nfs4_construct_boot_verifier(clp, &sc_verifier);
3910 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3911 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3913 rpc_peeraddr2str(clp->cl_rpcclient,
3915 rpc_peeraddr2str(clp->cl_rpcclient,
3917 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3918 clp->cl_id_uniquifier);
3919 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3920 sizeof(setclientid.sc_netid),
3921 rpc_peeraddr2str(clp->cl_rpcclient,
3922 RPC_DISPLAY_NETID));
3923 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3924 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3925 clp->cl_ipaddr, port >> 8, port & 255);
3928 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3929 if (status != -NFS4ERR_CLID_INUSE)
3932 ++clp->cl_id_uniquifier;
3936 ssleep(clp->cl_lease_time / HZ + 1);
3941 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3942 struct nfs4_setclientid_res *arg,
3943 struct rpc_cred *cred)
3945 struct nfs_fsinfo fsinfo;
3946 struct rpc_message msg = {
3947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3949 .rpc_resp = &fsinfo,
3956 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3958 spin_lock(&clp->cl_lock);
3959 clp->cl_lease_time = fsinfo.lease_time * HZ;
3960 clp->cl_last_renewal = now;
3961 spin_unlock(&clp->cl_lock);
3966 struct nfs4_delegreturndata {
3967 struct nfs4_delegreturnargs args;
3968 struct nfs4_delegreturnres res;
3970 nfs4_stateid stateid;
3971 unsigned long timestamp;
3972 struct nfs_fattr fattr;
3976 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3978 struct nfs4_delegreturndata *data = calldata;
3980 if (!nfs4_sequence_done(task, &data->res.seq_res))
3983 switch (task->tk_status) {
3984 case -NFS4ERR_STALE_STATEID:
3985 case -NFS4ERR_EXPIRED:
3987 renew_lease(data->res.server, data->timestamp);
3990 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3992 rpc_restart_call_prepare(task);
3996 data->rpc_status = task->tk_status;
3999 static void nfs4_delegreturn_release(void *calldata)
4004 #if defined(CONFIG_NFS_V4_1)
4005 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4007 struct nfs4_delegreturndata *d_data;
4009 d_data = (struct nfs4_delegreturndata *)data;
4011 if (nfs4_setup_sequence(d_data->res.server,
4012 &d_data->args.seq_args,
4013 &d_data->res.seq_res, task))
4015 rpc_call_start(task);
4017 #endif /* CONFIG_NFS_V4_1 */
4019 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4020 #if defined(CONFIG_NFS_V4_1)
4021 .rpc_call_prepare = nfs4_delegreturn_prepare,
4022 #endif /* CONFIG_NFS_V4_1 */
4023 .rpc_call_done = nfs4_delegreturn_done,
4024 .rpc_release = nfs4_delegreturn_release,
4027 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4029 struct nfs4_delegreturndata *data;
4030 struct nfs_server *server = NFS_SERVER(inode);
4031 struct rpc_task *task;
4032 struct rpc_message msg = {
4033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4036 struct rpc_task_setup task_setup_data = {
4037 .rpc_client = server->client,
4038 .rpc_message = &msg,
4039 .callback_ops = &nfs4_delegreturn_ops,
4040 .flags = RPC_TASK_ASYNC,
4044 data = kzalloc(sizeof(*data), GFP_NOFS);
4047 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4048 data->args.fhandle = &data->fh;
4049 data->args.stateid = &data->stateid;
4050 data->args.bitmask = server->attr_bitmask;
4051 nfs_copy_fh(&data->fh, NFS_FH(inode));
4052 nfs4_stateid_copy(&data->stateid, stateid);
4053 data->res.fattr = &data->fattr;
4054 data->res.server = server;
4055 nfs_fattr_init(data->res.fattr);
4056 data->timestamp = jiffies;
4057 data->rpc_status = 0;
4059 task_setup_data.callback_data = data;
4060 msg.rpc_argp = &data->args;
4061 msg.rpc_resp = &data->res;
4062 task = rpc_run_task(&task_setup_data);
4064 return PTR_ERR(task);
4067 status = nfs4_wait_for_completion_rpc_task(task);
4070 status = data->rpc_status;
4073 nfs_refresh_inode(inode, &data->fattr);
4079 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4081 struct nfs_server *server = NFS_SERVER(inode);
4082 struct nfs4_exception exception = { };
4085 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4087 case -NFS4ERR_STALE_STATEID:
4088 case -NFS4ERR_EXPIRED:
4092 err = nfs4_handle_exception(server, err, &exception);
4093 } while (exception.retry);
4097 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4098 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4101 * sleep, with exponential backoff, and retry the LOCK operation.
4103 static unsigned long
4104 nfs4_set_lock_task_retry(unsigned long timeout)
4106 freezable_schedule_timeout_killable(timeout);
4108 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4109 return NFS4_LOCK_MAXTIMEOUT;
4113 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4115 struct inode *inode = state->inode;
4116 struct nfs_server *server = NFS_SERVER(inode);
4117 struct nfs_client *clp = server->nfs_client;
4118 struct nfs_lockt_args arg = {
4119 .fh = NFS_FH(inode),
4122 struct nfs_lockt_res res = {
4125 struct rpc_message msg = {
4126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4129 .rpc_cred = state->owner->so_cred,
4131 struct nfs4_lock_state *lsp;
4134 arg.lock_owner.clientid = clp->cl_clientid;
4135 status = nfs4_set_lock_state(state, request);
4138 lsp = request->fl_u.nfs4_fl.owner;
4139 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4140 arg.lock_owner.s_dev = server->s_dev;
4141 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4144 request->fl_type = F_UNLCK;
4146 case -NFS4ERR_DENIED:
4149 request->fl_ops->fl_release_private(request);
4154 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4156 struct nfs4_exception exception = { };
4160 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4161 _nfs4_proc_getlk(state, cmd, request),
4163 } while (exception.retry);
4167 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4170 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4172 res = posix_lock_file_wait(file, fl);
4175 res = flock_lock_file_wait(file, fl);
4183 struct nfs4_unlockdata {
4184 struct nfs_locku_args arg;
4185 struct nfs_locku_res res;
4186 struct nfs4_lock_state *lsp;
4187 struct nfs_open_context *ctx;
4188 struct file_lock fl;
4189 const struct nfs_server *server;
4190 unsigned long timestamp;
4193 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4194 struct nfs_open_context *ctx,
4195 struct nfs4_lock_state *lsp,
4196 struct nfs_seqid *seqid)
4198 struct nfs4_unlockdata *p;
4199 struct inode *inode = lsp->ls_state->inode;
4201 p = kzalloc(sizeof(*p), GFP_NOFS);
4204 p->arg.fh = NFS_FH(inode);
4206 p->arg.seqid = seqid;
4207 p->res.seqid = seqid;
4208 p->arg.stateid = &lsp->ls_stateid;
4210 atomic_inc(&lsp->ls_count);
4211 /* Ensure we don't close file until we're done freeing locks! */
4212 p->ctx = get_nfs_open_context(ctx);
4213 memcpy(&p->fl, fl, sizeof(p->fl));
4214 p->server = NFS_SERVER(inode);
4218 static void nfs4_locku_release_calldata(void *data)
4220 struct nfs4_unlockdata *calldata = data;
4221 nfs_free_seqid(calldata->arg.seqid);
4222 nfs4_put_lock_state(calldata->lsp);
4223 put_nfs_open_context(calldata->ctx);
4227 static void nfs4_locku_done(struct rpc_task *task, void *data)
4229 struct nfs4_unlockdata *calldata = data;
4231 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4233 switch (task->tk_status) {
4235 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4236 &calldata->res.stateid);
4237 renew_lease(calldata->server, calldata->timestamp);
4239 case -NFS4ERR_BAD_STATEID:
4240 case -NFS4ERR_OLD_STATEID:
4241 case -NFS4ERR_STALE_STATEID:
4242 case -NFS4ERR_EXPIRED:
4245 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4246 rpc_restart_call_prepare(task);
4250 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4252 struct nfs4_unlockdata *calldata = data;
4254 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4256 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4257 /* Note: exit _without_ running nfs4_locku_done */
4258 task->tk_action = NULL;
4261 calldata->timestamp = jiffies;
4262 if (nfs4_setup_sequence(calldata->server,
4263 &calldata->arg.seq_args,
4264 &calldata->res.seq_res, task))
4266 rpc_call_start(task);
4269 static const struct rpc_call_ops nfs4_locku_ops = {
4270 .rpc_call_prepare = nfs4_locku_prepare,
4271 .rpc_call_done = nfs4_locku_done,
4272 .rpc_release = nfs4_locku_release_calldata,
4275 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4276 struct nfs_open_context *ctx,
4277 struct nfs4_lock_state *lsp,
4278 struct nfs_seqid *seqid)
4280 struct nfs4_unlockdata *data;
4281 struct rpc_message msg = {
4282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4283 .rpc_cred = ctx->cred,
4285 struct rpc_task_setup task_setup_data = {
4286 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4287 .rpc_message = &msg,
4288 .callback_ops = &nfs4_locku_ops,
4289 .workqueue = nfsiod_workqueue,
4290 .flags = RPC_TASK_ASYNC,
4293 /* Ensure this is an unlock - when canceling a lock, the
4294 * canceled lock is passed in, and it won't be an unlock.
4296 fl->fl_type = F_UNLCK;
4298 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4300 nfs_free_seqid(seqid);
4301 return ERR_PTR(-ENOMEM);
4304 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4305 msg.rpc_argp = &data->arg;
4306 msg.rpc_resp = &data->res;
4307 task_setup_data.callback_data = data;
4308 return rpc_run_task(&task_setup_data);
4311 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4313 struct nfs_inode *nfsi = NFS_I(state->inode);
4314 struct nfs_seqid *seqid;
4315 struct nfs4_lock_state *lsp;
4316 struct rpc_task *task;
4318 unsigned char fl_flags = request->fl_flags;
4320 status = nfs4_set_lock_state(state, request);
4321 /* Unlock _before_ we do the RPC call */
4322 request->fl_flags |= FL_EXISTS;
4323 down_read(&nfsi->rwsem);
4324 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4325 up_read(&nfsi->rwsem);
4328 up_read(&nfsi->rwsem);
4331 /* Is this a delegated lock? */
4332 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4334 lsp = request->fl_u.nfs4_fl.owner;
4335 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4339 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4340 status = PTR_ERR(task);
4343 status = nfs4_wait_for_completion_rpc_task(task);
4346 request->fl_flags = fl_flags;
4350 struct nfs4_lockdata {
4351 struct nfs_lock_args arg;
4352 struct nfs_lock_res res;
4353 struct nfs4_lock_state *lsp;
4354 struct nfs_open_context *ctx;
4355 struct file_lock fl;
4356 unsigned long timestamp;
4359 struct nfs_server *server;
4362 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4363 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4366 struct nfs4_lockdata *p;
4367 struct inode *inode = lsp->ls_state->inode;
4368 struct nfs_server *server = NFS_SERVER(inode);
4370 p = kzalloc(sizeof(*p), gfp_mask);
4374 p->arg.fh = NFS_FH(inode);
4376 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4377 if (p->arg.open_seqid == NULL)
4379 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4380 if (p->arg.lock_seqid == NULL)
4381 goto out_free_seqid;
4382 p->arg.lock_stateid = &lsp->ls_stateid;
4383 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4384 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4385 p->arg.lock_owner.s_dev = server->s_dev;
4386 p->res.lock_seqid = p->arg.lock_seqid;
4389 atomic_inc(&lsp->ls_count);
4390 p->ctx = get_nfs_open_context(ctx);
4391 memcpy(&p->fl, fl, sizeof(p->fl));
4394 nfs_free_seqid(p->arg.open_seqid);
4400 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4402 struct nfs4_lockdata *data = calldata;
4403 struct nfs4_state *state = data->lsp->ls_state;
4405 dprintk("%s: begin!\n", __func__);
4406 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4408 /* Do we need to do an open_to_lock_owner? */
4409 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4410 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4412 data->arg.open_stateid = &state->stateid;
4413 data->arg.new_lock_owner = 1;
4414 data->res.open_seqid = data->arg.open_seqid;
4416 data->arg.new_lock_owner = 0;
4417 data->timestamp = jiffies;
4418 if (nfs4_setup_sequence(data->server,
4419 &data->arg.seq_args,
4420 &data->res.seq_res, task))
4422 rpc_call_start(task);
4423 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4426 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4428 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4429 nfs4_lock_prepare(task, calldata);
4432 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4434 struct nfs4_lockdata *data = calldata;
4436 dprintk("%s: begin!\n", __func__);
4438 if (!nfs4_sequence_done(task, &data->res.seq_res))
4441 data->rpc_status = task->tk_status;
4442 if (data->arg.new_lock_owner != 0) {
4443 if (data->rpc_status == 0)
4444 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4448 if (data->rpc_status == 0) {
4449 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4450 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4451 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4454 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4457 static void nfs4_lock_release(void *calldata)
4459 struct nfs4_lockdata *data = calldata;
4461 dprintk("%s: begin!\n", __func__);
4462 nfs_free_seqid(data->arg.open_seqid);
4463 if (data->cancelled != 0) {
4464 struct rpc_task *task;
4465 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4466 data->arg.lock_seqid);
4468 rpc_put_task_async(task);
4469 dprintk("%s: cancelling lock!\n", __func__);
4471 nfs_free_seqid(data->arg.lock_seqid);
4472 nfs4_put_lock_state(data->lsp);
4473 put_nfs_open_context(data->ctx);
4475 dprintk("%s: done!\n", __func__);
4478 static const struct rpc_call_ops nfs4_lock_ops = {
4479 .rpc_call_prepare = nfs4_lock_prepare,
4480 .rpc_call_done = nfs4_lock_done,
4481 .rpc_release = nfs4_lock_release,
4484 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4485 .rpc_call_prepare = nfs4_recover_lock_prepare,
4486 .rpc_call_done = nfs4_lock_done,
4487 .rpc_release = nfs4_lock_release,
4490 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4493 case -NFS4ERR_ADMIN_REVOKED:
4494 case -NFS4ERR_BAD_STATEID:
4495 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4496 if (new_lock_owner != 0 ||
4497 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4498 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4500 case -NFS4ERR_STALE_STATEID:
4501 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4502 case -NFS4ERR_EXPIRED:
4503 nfs4_schedule_lease_recovery(server->nfs_client);
4507 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4509 struct nfs4_lockdata *data;
4510 struct rpc_task *task;
4511 struct rpc_message msg = {
4512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4513 .rpc_cred = state->owner->so_cred,
4515 struct rpc_task_setup task_setup_data = {
4516 .rpc_client = NFS_CLIENT(state->inode),
4517 .rpc_message = &msg,
4518 .callback_ops = &nfs4_lock_ops,
4519 .workqueue = nfsiod_workqueue,
4520 .flags = RPC_TASK_ASYNC,
4524 dprintk("%s: begin!\n", __func__);
4525 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4526 fl->fl_u.nfs4_fl.owner,
4527 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4531 data->arg.block = 1;
4532 if (recovery_type > NFS_LOCK_NEW) {
4533 if (recovery_type == NFS_LOCK_RECLAIM)
4534 data->arg.reclaim = NFS_LOCK_RECLAIM;
4535 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4537 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4538 msg.rpc_argp = &data->arg;
4539 msg.rpc_resp = &data->res;
4540 task_setup_data.callback_data = data;
4541 task = rpc_run_task(&task_setup_data);
4543 return PTR_ERR(task);
4544 ret = nfs4_wait_for_completion_rpc_task(task);
4546 ret = data->rpc_status;
4548 nfs4_handle_setlk_error(data->server, data->lsp,
4549 data->arg.new_lock_owner, ret);
4551 data->cancelled = 1;
4553 dprintk("%s: done, ret = %d!\n", __func__, ret);
4557 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4559 struct nfs_server *server = NFS_SERVER(state->inode);
4560 struct nfs4_exception exception = { };
4564 /* Cache the lock if possible... */
4565 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4567 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4568 if (err != -NFS4ERR_DELAY)
4570 nfs4_handle_exception(server, err, &exception);
4571 } while (exception.retry);
4575 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4577 struct nfs_server *server = NFS_SERVER(state->inode);
4578 struct nfs4_exception exception = { };
4581 err = nfs4_set_lock_state(state, request);
4585 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4587 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4591 case -NFS4ERR_GRACE:
4592 case -NFS4ERR_DELAY:
4593 nfs4_handle_exception(server, err, &exception);
4596 } while (exception.retry);
4601 #if defined(CONFIG_NFS_V4_1)
4602 static int nfs41_check_expired_locks(struct nfs4_state *state)
4604 int status, ret = NFS_OK;
4605 struct nfs4_lock_state *lsp;
4606 struct nfs_server *server = NFS_SERVER(state->inode);
4608 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4609 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4610 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4611 if (status != NFS_OK) {
4612 nfs41_free_stateid(server, &lsp->ls_stateid);
4613 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4622 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4624 int status = NFS_OK;
4626 if (test_bit(LK_STATE_IN_USE, &state->flags))
4627 status = nfs41_check_expired_locks(state);
4628 if (status == NFS_OK)
4630 return nfs4_lock_expired(state, request);
4634 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4636 struct nfs_inode *nfsi = NFS_I(state->inode);
4637 unsigned char fl_flags = request->fl_flags;
4638 int status = -ENOLCK;
4640 if ((fl_flags & FL_POSIX) &&
4641 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4643 /* Is this a delegated open? */
4644 status = nfs4_set_lock_state(state, request);
4647 request->fl_flags |= FL_ACCESS;
4648 status = do_vfs_lock(request->fl_file, request);
4651 down_read(&nfsi->rwsem);
4652 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4653 /* Yes: cache locks! */
4654 /* ...but avoid races with delegation recall... */
4655 request->fl_flags = fl_flags & ~FL_SLEEP;
4656 status = do_vfs_lock(request->fl_file, request);
4659 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4662 /* Note: we always want to sleep here! */
4663 request->fl_flags = fl_flags | FL_SLEEP;
4664 if (do_vfs_lock(request->fl_file, request) < 0)
4665 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4666 "manager!\n", __func__);
4668 up_read(&nfsi->rwsem);
4670 request->fl_flags = fl_flags;
4674 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4676 struct nfs4_exception exception = {
4682 err = _nfs4_proc_setlk(state, cmd, request);
4683 if (err == -NFS4ERR_DENIED)
4685 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4687 } while (exception.retry);
4692 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4694 struct nfs_open_context *ctx;
4695 struct nfs4_state *state;
4696 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4699 /* verify open state */
4700 ctx = nfs_file_open_context(filp);
4703 if (request->fl_start < 0 || request->fl_end < 0)
4706 if (IS_GETLK(cmd)) {
4708 return nfs4_proc_getlk(state, F_GETLK, request);
4712 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4715 if (request->fl_type == F_UNLCK) {
4717 return nfs4_proc_unlck(state, cmd, request);
4724 status = nfs4_proc_setlk(state, cmd, request);
4725 if ((status != -EAGAIN) || IS_SETLK(cmd))
4727 timeout = nfs4_set_lock_task_retry(timeout);
4728 status = -ERESTARTSYS;
4731 } while(status < 0);
4735 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4737 struct nfs_server *server = NFS_SERVER(state->inode);
4738 struct nfs4_exception exception = { };
4741 err = nfs4_set_lock_state(state, fl);
4745 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4748 printk(KERN_ERR "NFS: %s: unhandled error "
4749 "%d.\n", __func__, err);
4753 case -NFS4ERR_EXPIRED:
4754 nfs4_schedule_stateid_recovery(server, state);
4755 case -NFS4ERR_STALE_CLIENTID:
4756 case -NFS4ERR_STALE_STATEID:
4757 nfs4_schedule_lease_recovery(server->nfs_client);
4759 case -NFS4ERR_BADSESSION:
4760 case -NFS4ERR_BADSLOT:
4761 case -NFS4ERR_BAD_HIGH_SLOT:
4762 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4763 case -NFS4ERR_DEADSESSION:
4764 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4768 * The show must go on: exit, but mark the
4769 * stateid as needing recovery.
4771 case -NFS4ERR_DELEG_REVOKED:
4772 case -NFS4ERR_ADMIN_REVOKED:
4773 case -NFS4ERR_BAD_STATEID:
4774 case -NFS4ERR_OPENMODE:
4775 nfs4_schedule_stateid_recovery(server, state);
4780 * User RPCSEC_GSS context has expired.
4781 * We cannot recover this stateid now, so
4782 * skip it and allow recovery thread to
4788 case -NFS4ERR_DENIED:
4789 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4792 case -NFS4ERR_DELAY:
4795 err = nfs4_handle_exception(server, err, &exception);
4796 } while (exception.retry);
4801 struct nfs_release_lockowner_data {
4802 struct nfs4_lock_state *lsp;
4803 struct nfs_server *server;
4804 struct nfs_release_lockowner_args args;
4807 static void nfs4_release_lockowner_release(void *calldata)
4809 struct nfs_release_lockowner_data *data = calldata;
4810 nfs4_free_lock_state(data->server, data->lsp);
4814 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4815 .rpc_release = nfs4_release_lockowner_release,
4818 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4820 struct nfs_server *server = lsp->ls_state->owner->so_server;
4821 struct nfs_release_lockowner_data *data;
4822 struct rpc_message msg = {
4823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4826 if (server->nfs_client->cl_mvops->minor_version != 0)
4828 data = kmalloc(sizeof(*data), GFP_NOFS);
4832 data->server = server;
4833 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4834 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4835 data->args.lock_owner.s_dev = server->s_dev;
4836 msg.rpc_argp = &data->args;
4837 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4841 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4843 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4844 const void *buf, size_t buflen,
4845 int flags, int type)
4847 if (strcmp(key, "") != 0)
4850 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4853 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4854 void *buf, size_t buflen, int type)
4856 if (strcmp(key, "") != 0)
4859 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4862 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4863 size_t list_len, const char *name,
4864 size_t name_len, int type)
4866 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4868 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4871 if (list && len <= list_len)
4872 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4877 * nfs_fhget will use either the mounted_on_fileid or the fileid
4879 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4881 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4882 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4883 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4884 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4887 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4888 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4889 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4893 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4894 struct nfs4_fs_locations *fs_locations, struct page *page)
4896 struct nfs_server *server = NFS_SERVER(dir);
4898 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4900 struct nfs4_fs_locations_arg args = {
4901 .dir_fh = NFS_FH(dir),
4906 struct nfs4_fs_locations_res res = {
4907 .fs_locations = fs_locations,
4909 struct rpc_message msg = {
4910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4916 dprintk("%s: start\n", __func__);
4918 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4919 * is not supported */
4920 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4921 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4923 bitmask[0] |= FATTR4_WORD0_FILEID;
4925 nfs_fattr_init(&fs_locations->fattr);
4926 fs_locations->server = server;
4927 fs_locations->nlocations = 0;
4928 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4929 dprintk("%s: returned status = %d\n", __func__, status);
4933 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4936 struct nfs4_secinfo_arg args = {
4937 .dir_fh = NFS_FH(dir),
4940 struct nfs4_secinfo_res res = {
4943 struct rpc_message msg = {
4944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4949 dprintk("NFS call secinfo %s\n", name->name);
4950 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4951 dprintk("NFS reply secinfo: %d\n", status);
4955 static int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
4956 struct nfs4_secinfo_flavors *flavors)
4958 struct nfs4_exception exception = { };
4961 err = nfs4_handle_exception(NFS_SERVER(dir),
4962 _nfs4_proc_secinfo(dir, name, flavors),
4964 } while (exception.retry);
4968 #ifdef CONFIG_NFS_V4_1
4970 * Check the exchange flags returned by the server for invalid flags, having
4971 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4974 static int nfs4_check_cl_exchange_flags(u32 flags)
4976 if (flags & ~EXCHGID4_FLAG_MASK_R)
4978 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4979 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4981 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4985 return -NFS4ERR_INVAL;
4989 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4991 if (a->server_scope_sz == b->server_scope_sz &&
4992 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4999 * nfs4_proc_exchange_id()
5001 * Since the clientid has expired, all compounds using sessions
5002 * associated with the stale clientid will be returning
5003 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5004 * be in some phase of session reset.
5006 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5008 nfs4_verifier verifier;
5009 struct nfs41_exchange_id_args args = {
5010 .verifier = &verifier,
5012 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5014 struct nfs41_exchange_id_res res = {
5018 struct rpc_message msg = {
5019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5025 dprintk("--> %s\n", __func__);
5026 BUG_ON(clp == NULL);
5028 nfs4_construct_boot_verifier(clp, &verifier);
5030 args.id_len = scnprintf(args.id, sizeof(args.id),
5033 init_utsname()->nodename,
5034 init_utsname()->domainname,
5035 clp->cl_rpcclient->cl_auth->au_flavor);
5037 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
5038 if (unlikely(!res.server_scope)) {
5043 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5044 if (unlikely(!res.impl_id)) {
5046 goto out_server_scope;
5049 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5051 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
5054 /* use the most recent implementation id */
5055 kfree(clp->impl_id);
5056 clp->impl_id = res.impl_id;
5061 if (clp->server_scope &&
5062 !nfs41_same_server_scope(clp->server_scope,
5063 res.server_scope)) {
5064 dprintk("%s: server_scope mismatch detected\n",
5066 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5067 kfree(clp->server_scope);
5068 clp->server_scope = NULL;
5071 if (!clp->server_scope) {
5072 clp->server_scope = res.server_scope;
5078 kfree(res.server_scope);
5081 dprintk("%s: Server Implementation ID: "
5082 "domain: %s, name: %s, date: %llu,%u\n",
5083 __func__, clp->impl_id->domain, clp->impl_id->name,
5084 clp->impl_id->date.seconds,
5085 clp->impl_id->date.nseconds);
5086 dprintk("<-- %s status= %d\n", __func__, status);
5090 struct nfs4_get_lease_time_data {
5091 struct nfs4_get_lease_time_args *args;
5092 struct nfs4_get_lease_time_res *res;
5093 struct nfs_client *clp;
5096 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5100 struct nfs4_get_lease_time_data *data =
5101 (struct nfs4_get_lease_time_data *)calldata;
5103 dprintk("--> %s\n", __func__);
5104 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5105 /* just setup sequence, do not trigger session recovery
5106 since we're invoked within one */
5107 ret = nfs41_setup_sequence(data->clp->cl_session,
5108 &data->args->la_seq_args,
5109 &data->res->lr_seq_res, task);
5111 BUG_ON(ret == -EAGAIN);
5112 rpc_call_start(task);
5113 dprintk("<-- %s\n", __func__);
5117 * Called from nfs4_state_manager thread for session setup, so don't recover
5118 * from sequence operation or clientid errors.
5120 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5122 struct nfs4_get_lease_time_data *data =
5123 (struct nfs4_get_lease_time_data *)calldata;
5125 dprintk("--> %s\n", __func__);
5126 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5128 switch (task->tk_status) {
5129 case -NFS4ERR_DELAY:
5130 case -NFS4ERR_GRACE:
5131 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5132 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5133 task->tk_status = 0;
5135 case -NFS4ERR_RETRY_UNCACHED_REP:
5136 rpc_restart_call_prepare(task);
5139 dprintk("<-- %s\n", __func__);
5142 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5143 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5144 .rpc_call_done = nfs4_get_lease_time_done,
5147 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5149 struct rpc_task *task;
5150 struct nfs4_get_lease_time_args args;
5151 struct nfs4_get_lease_time_res res = {
5152 .lr_fsinfo = fsinfo,
5154 struct nfs4_get_lease_time_data data = {
5159 struct rpc_message msg = {
5160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5164 struct rpc_task_setup task_setup = {
5165 .rpc_client = clp->cl_rpcclient,
5166 .rpc_message = &msg,
5167 .callback_ops = &nfs4_get_lease_time_ops,
5168 .callback_data = &data,
5169 .flags = RPC_TASK_TIMEOUT,
5173 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5174 dprintk("--> %s\n", __func__);
5175 task = rpc_run_task(&task_setup);
5178 status = PTR_ERR(task);
5180 status = task->tk_status;
5183 dprintk("<-- %s return %d\n", __func__, status);
5188 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5190 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5193 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5194 struct nfs4_slot *new,
5198 struct nfs4_slot *old = NULL;
5201 spin_lock(&tbl->slot_tbl_lock);
5205 tbl->max_slots = max_slots;
5207 tbl->highest_used_slotid = -1; /* no slot is currently used */
5208 for (i = 0; i < tbl->max_slots; i++)
5209 tbl->slots[i].seq_nr = ivalue;
5210 spin_unlock(&tbl->slot_tbl_lock);
5215 * (re)Initialise a slot table
5217 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5220 struct nfs4_slot *new = NULL;
5223 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5224 max_reqs, tbl->max_slots);
5226 /* Does the newly negotiated max_reqs match the existing slot table? */
5227 if (max_reqs != tbl->max_slots) {
5228 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5234 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5235 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5236 tbl, tbl->slots, tbl->max_slots);
5238 dprintk("<-- %s: return %d\n", __func__, ret);
5242 /* Destroy the slot table */
5243 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5245 if (session->fc_slot_table.slots != NULL) {
5246 kfree(session->fc_slot_table.slots);
5247 session->fc_slot_table.slots = NULL;
5249 if (session->bc_slot_table.slots != NULL) {
5250 kfree(session->bc_slot_table.slots);
5251 session->bc_slot_table.slots = NULL;
5257 * Initialize or reset the forechannel and backchannel tables
5259 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5261 struct nfs4_slot_table *tbl;
5264 dprintk("--> %s\n", __func__);
5266 tbl = &ses->fc_slot_table;
5267 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5268 if (status) /* -ENOMEM */
5271 tbl = &ses->bc_slot_table;
5272 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5273 if (status && tbl->slots == NULL)
5274 /* Fore and back channel share a connection so get
5275 * both slot tables or neither */
5276 nfs4_destroy_slot_tables(ses);
5280 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5282 struct nfs4_session *session;
5283 struct nfs4_slot_table *tbl;
5285 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5289 tbl = &session->fc_slot_table;
5290 tbl->highest_used_slotid = NFS4_NO_SLOT;
5291 spin_lock_init(&tbl->slot_tbl_lock);
5292 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5293 init_completion(&tbl->complete);
5295 tbl = &session->bc_slot_table;
5296 tbl->highest_used_slotid = NFS4_NO_SLOT;
5297 spin_lock_init(&tbl->slot_tbl_lock);
5298 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5299 init_completion(&tbl->complete);
5301 session->session_state = 1<<NFS4_SESSION_INITING;
5307 void nfs4_destroy_session(struct nfs4_session *session)
5309 struct rpc_xprt *xprt;
5311 nfs4_proc_destroy_session(session);
5314 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5316 dprintk("%s Destroy backchannel for xprt %p\n",
5318 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5319 nfs4_destroy_slot_tables(session);
5324 * Initialize the values to be used by the client in CREATE_SESSION
5325 * If nfs4_init_session set the fore channel request and response sizes,
5328 * Set the back channel max_resp_sz_cached to zero to force the client to
5329 * always set csa_cachethis to FALSE because the current implementation
5330 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5332 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5334 struct nfs4_session *session = args->client->cl_session;
5335 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5336 mxresp_sz = session->fc_attrs.max_resp_sz;
5339 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5341 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5342 /* Fore channel attributes */
5343 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5344 args->fc_attrs.max_resp_sz = mxresp_sz;
5345 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5346 args->fc_attrs.max_reqs = max_session_slots;
5348 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5349 "max_ops=%u max_reqs=%u\n",
5351 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5352 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5354 /* Back channel attributes */
5355 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5356 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5357 args->bc_attrs.max_resp_sz_cached = 0;
5358 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5359 args->bc_attrs.max_reqs = 1;
5361 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5362 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5364 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5365 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5366 args->bc_attrs.max_reqs);
5369 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5371 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5372 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5374 if (rcvd->max_resp_sz > sent->max_resp_sz)
5377 * Our requested max_ops is the minimum we need; we're not
5378 * prepared to break up compounds into smaller pieces than that.
5379 * So, no point even trying to continue if the server won't
5382 if (rcvd->max_ops < sent->max_ops)
5384 if (rcvd->max_reqs == 0)
5386 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5387 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5391 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5393 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5394 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5396 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5398 if (rcvd->max_resp_sz < sent->max_resp_sz)
5400 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5402 /* These would render the backchannel useless: */
5403 if (rcvd->max_ops != sent->max_ops)
5405 if (rcvd->max_reqs != sent->max_reqs)
5410 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5411 struct nfs4_session *session)
5415 ret = nfs4_verify_fore_channel_attrs(args, session);
5418 return nfs4_verify_back_channel_attrs(args, session);
5421 static int _nfs4_proc_create_session(struct nfs_client *clp)
5423 struct nfs4_session *session = clp->cl_session;
5424 struct nfs41_create_session_args args = {
5426 .cb_program = NFS4_CALLBACK,
5428 struct nfs41_create_session_res res = {
5431 struct rpc_message msg = {
5432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5438 nfs4_init_channel_attrs(&args);
5439 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5441 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5444 /* Verify the session's negotiated channel_attrs values */
5445 status = nfs4_verify_channel_attrs(&args, session);
5447 /* Increment the clientid slot sequence id */
5455 * Issues a CREATE_SESSION operation to the server.
5456 * It is the responsibility of the caller to verify the session is
5457 * expired before calling this routine.
5459 int nfs4_proc_create_session(struct nfs_client *clp)
5463 struct nfs4_session *session = clp->cl_session;
5465 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5467 status = _nfs4_proc_create_session(clp);
5471 /* Init or reset the session slot tables */
5472 status = nfs4_setup_session_slot_tables(session);
5473 dprintk("slot table setup returned %d\n", status);
5477 ptr = (unsigned *)&session->sess_id.data[0];
5478 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5479 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5481 dprintk("<-- %s\n", __func__);
5486 * Issue the over-the-wire RPC DESTROY_SESSION.
5487 * The caller must serialize access to this routine.
5489 int nfs4_proc_destroy_session(struct nfs4_session *session)
5492 struct rpc_message msg;
5494 dprintk("--> nfs4_proc_destroy_session\n");
5496 /* session is still being setup */
5497 if (session->clp->cl_cons_state != NFS_CS_READY)
5500 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5501 msg.rpc_argp = session;
5502 msg.rpc_resp = NULL;
5503 msg.rpc_cred = NULL;
5504 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5508 "NFS: Got error %d from the server on DESTROY_SESSION. "
5509 "Session has been destroyed regardless...\n", status);
5511 dprintk("<-- nfs4_proc_destroy_session\n");
5515 int nfs4_init_session(struct nfs_server *server)
5517 struct nfs_client *clp = server->nfs_client;
5518 struct nfs4_session *session;
5519 unsigned int rsize, wsize;
5522 if (!nfs4_has_session(clp))
5525 session = clp->cl_session;
5526 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5529 rsize = server->rsize;
5531 rsize = NFS_MAX_FILE_IO_SIZE;
5532 wsize = server->wsize;
5534 wsize = NFS_MAX_FILE_IO_SIZE;
5536 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5537 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5539 ret = nfs4_recover_expired_lease(server);
5541 ret = nfs4_check_client_ready(clp);
5545 int nfs4_init_ds_session(struct nfs_client *clp)
5547 struct nfs4_session *session = clp->cl_session;
5550 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5553 ret = nfs4_client_recover_expired_lease(clp);
5555 /* Test for the DS role */
5556 if (!is_ds_client(clp))
5559 ret = nfs4_check_client_ready(clp);
5563 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5567 * Renew the cl_session lease.
5569 struct nfs4_sequence_data {
5570 struct nfs_client *clp;
5571 struct nfs4_sequence_args args;
5572 struct nfs4_sequence_res res;
5575 static void nfs41_sequence_release(void *data)
5577 struct nfs4_sequence_data *calldata = data;
5578 struct nfs_client *clp = calldata->clp;
5580 if (atomic_read(&clp->cl_count) > 1)
5581 nfs4_schedule_state_renewal(clp);
5582 nfs_put_client(clp);
5586 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5588 switch(task->tk_status) {
5589 case -NFS4ERR_DELAY:
5590 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5593 nfs4_schedule_lease_recovery(clp);
5598 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5600 struct nfs4_sequence_data *calldata = data;
5601 struct nfs_client *clp = calldata->clp;
5603 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5606 if (task->tk_status < 0) {
5607 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5608 if (atomic_read(&clp->cl_count) == 1)
5611 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5612 rpc_restart_call_prepare(task);
5616 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5618 dprintk("<-- %s\n", __func__);
5621 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5623 struct nfs4_sequence_data *calldata = data;
5624 struct nfs_client *clp = calldata->clp;
5625 struct nfs4_sequence_args *args;
5626 struct nfs4_sequence_res *res;
5628 args = task->tk_msg.rpc_argp;
5629 res = task->tk_msg.rpc_resp;
5631 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5633 rpc_call_start(task);
5636 static const struct rpc_call_ops nfs41_sequence_ops = {
5637 .rpc_call_done = nfs41_sequence_call_done,
5638 .rpc_call_prepare = nfs41_sequence_prepare,
5639 .rpc_release = nfs41_sequence_release,
5642 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5644 struct nfs4_sequence_data *calldata;
5645 struct rpc_message msg = {
5646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5649 struct rpc_task_setup task_setup_data = {
5650 .rpc_client = clp->cl_rpcclient,
5651 .rpc_message = &msg,
5652 .callback_ops = &nfs41_sequence_ops,
5653 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5656 if (!atomic_inc_not_zero(&clp->cl_count))
5657 return ERR_PTR(-EIO);
5658 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5659 if (calldata == NULL) {
5660 nfs_put_client(clp);
5661 return ERR_PTR(-ENOMEM);
5663 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5664 msg.rpc_argp = &calldata->args;
5665 msg.rpc_resp = &calldata->res;
5666 calldata->clp = clp;
5667 task_setup_data.callback_data = calldata;
5669 return rpc_run_task(&task_setup_data);
5672 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5674 struct rpc_task *task;
5677 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5679 task = _nfs41_proc_sequence(clp, cred);
5681 ret = PTR_ERR(task);
5683 rpc_put_task_async(task);
5684 dprintk("<-- %s status=%d\n", __func__, ret);
5688 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5690 struct rpc_task *task;
5693 task = _nfs41_proc_sequence(clp, cred);
5695 ret = PTR_ERR(task);
5698 ret = rpc_wait_for_completion_task(task);
5700 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5702 if (task->tk_status == 0)
5703 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5704 ret = task->tk_status;
5708 dprintk("<-- %s status=%d\n", __func__, ret);
5712 struct nfs4_reclaim_complete_data {
5713 struct nfs_client *clp;
5714 struct nfs41_reclaim_complete_args arg;
5715 struct nfs41_reclaim_complete_res res;
5718 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5720 struct nfs4_reclaim_complete_data *calldata = data;
5722 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5723 if (nfs41_setup_sequence(calldata->clp->cl_session,
5724 &calldata->arg.seq_args,
5725 &calldata->res.seq_res, task))
5728 rpc_call_start(task);
5731 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5733 switch(task->tk_status) {
5735 case -NFS4ERR_COMPLETE_ALREADY:
5736 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5738 case -NFS4ERR_DELAY:
5739 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5741 case -NFS4ERR_RETRY_UNCACHED_REP:
5744 nfs4_schedule_lease_recovery(clp);
5749 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5751 struct nfs4_reclaim_complete_data *calldata = data;
5752 struct nfs_client *clp = calldata->clp;
5753 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5755 dprintk("--> %s\n", __func__);
5756 if (!nfs41_sequence_done(task, res))
5759 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5760 rpc_restart_call_prepare(task);
5763 dprintk("<-- %s\n", __func__);
5766 static void nfs4_free_reclaim_complete_data(void *data)
5768 struct nfs4_reclaim_complete_data *calldata = data;
5773 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5774 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5775 .rpc_call_done = nfs4_reclaim_complete_done,
5776 .rpc_release = nfs4_free_reclaim_complete_data,
5780 * Issue a global reclaim complete.
5782 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5784 struct nfs4_reclaim_complete_data *calldata;
5785 struct rpc_task *task;
5786 struct rpc_message msg = {
5787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5789 struct rpc_task_setup task_setup_data = {
5790 .rpc_client = clp->cl_rpcclient,
5791 .rpc_message = &msg,
5792 .callback_ops = &nfs4_reclaim_complete_call_ops,
5793 .flags = RPC_TASK_ASYNC,
5795 int status = -ENOMEM;
5797 dprintk("--> %s\n", __func__);
5798 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5799 if (calldata == NULL)
5801 calldata->clp = clp;
5802 calldata->arg.one_fs = 0;
5804 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5805 msg.rpc_argp = &calldata->arg;
5806 msg.rpc_resp = &calldata->res;
5807 task_setup_data.callback_data = calldata;
5808 task = rpc_run_task(&task_setup_data);
5810 status = PTR_ERR(task);
5813 status = nfs4_wait_for_completion_rpc_task(task);
5815 status = task->tk_status;
5819 dprintk("<-- %s status=%d\n", __func__, status);
5824 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5826 struct nfs4_layoutget *lgp = calldata;
5827 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5829 dprintk("--> %s\n", __func__);
5830 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5831 * right now covering the LAYOUTGET we are about to send.
5832 * However, that is not so catastrophic, and there seems
5833 * to be no way to prevent it completely.
5835 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5836 &lgp->res.seq_res, task))
5838 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5839 NFS_I(lgp->args.inode)->layout,
5840 lgp->args.ctx->state)) {
5841 rpc_exit(task, NFS4_OK);
5844 rpc_call_start(task);
5847 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5849 struct nfs4_layoutget *lgp = calldata;
5850 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5852 dprintk("--> %s\n", __func__);
5854 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5857 switch (task->tk_status) {
5860 case -NFS4ERR_LAYOUTTRYLATER:
5861 case -NFS4ERR_RECALLCONFLICT:
5862 task->tk_status = -NFS4ERR_DELAY;
5865 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5866 rpc_restart_call_prepare(task);
5870 dprintk("<-- %s\n", __func__);
5873 static void nfs4_layoutget_release(void *calldata)
5875 struct nfs4_layoutget *lgp = calldata;
5877 dprintk("--> %s\n", __func__);
5878 put_nfs_open_context(lgp->args.ctx);
5880 dprintk("<-- %s\n", __func__);
5883 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5884 .rpc_call_prepare = nfs4_layoutget_prepare,
5885 .rpc_call_done = nfs4_layoutget_done,
5886 .rpc_release = nfs4_layoutget_release,
5889 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5891 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5892 struct rpc_task *task;
5893 struct rpc_message msg = {
5894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5895 .rpc_argp = &lgp->args,
5896 .rpc_resp = &lgp->res,
5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = server->client,
5900 .rpc_message = &msg,
5901 .callback_ops = &nfs4_layoutget_call_ops,
5902 .callback_data = lgp,
5903 .flags = RPC_TASK_ASYNC,
5907 dprintk("--> %s\n", __func__);
5909 lgp->res.layoutp = &lgp->args.layout;
5910 lgp->res.seq_res.sr_slot = NULL;
5911 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5912 task = rpc_run_task(&task_setup_data);
5914 return PTR_ERR(task);
5915 status = nfs4_wait_for_completion_rpc_task(task);
5917 status = task->tk_status;
5919 status = pnfs_layout_process(lgp);
5921 dprintk("<-- %s status=%d\n", __func__, status);
5926 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5928 struct nfs4_layoutreturn *lrp = calldata;
5930 dprintk("--> %s\n", __func__);
5931 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5932 &lrp->res.seq_res, task))
5934 rpc_call_start(task);
5937 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5939 struct nfs4_layoutreturn *lrp = calldata;
5940 struct nfs_server *server;
5941 struct pnfs_layout_hdr *lo = lrp->args.layout;
5943 dprintk("--> %s\n", __func__);
5945 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5948 server = NFS_SERVER(lrp->args.inode);
5949 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5950 rpc_restart_call_prepare(task);
5953 spin_lock(&lo->plh_inode->i_lock);
5954 if (task->tk_status == 0) {
5955 if (lrp->res.lrs_present) {
5956 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5958 BUG_ON(!list_empty(&lo->plh_segs));
5960 lo->plh_block_lgets--;
5961 spin_unlock(&lo->plh_inode->i_lock);
5962 dprintk("<-- %s\n", __func__);
5965 static void nfs4_layoutreturn_release(void *calldata)
5967 struct nfs4_layoutreturn *lrp = calldata;
5969 dprintk("--> %s\n", __func__);
5970 put_layout_hdr(lrp->args.layout);
5972 dprintk("<-- %s\n", __func__);
5975 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5976 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5977 .rpc_call_done = nfs4_layoutreturn_done,
5978 .rpc_release = nfs4_layoutreturn_release,
5981 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5983 struct rpc_task *task;
5984 struct rpc_message msg = {
5985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5986 .rpc_argp = &lrp->args,
5987 .rpc_resp = &lrp->res,
5989 struct rpc_task_setup task_setup_data = {
5990 .rpc_client = lrp->clp->cl_rpcclient,
5991 .rpc_message = &msg,
5992 .callback_ops = &nfs4_layoutreturn_call_ops,
5993 .callback_data = lrp,
5997 dprintk("--> %s\n", __func__);
5998 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5999 task = rpc_run_task(&task_setup_data);
6001 return PTR_ERR(task);
6002 status = task->tk_status;
6003 dprintk("<-- %s status=%d\n", __func__, status);
6009 * Retrieve the list of Data Server devices from the MDS.
6011 static int _nfs4_getdevicelist(struct nfs_server *server,
6012 const struct nfs_fh *fh,
6013 struct pnfs_devicelist *devlist)
6015 struct nfs4_getdevicelist_args args = {
6017 .layoutclass = server->pnfs_curr_ld->id,
6019 struct nfs4_getdevicelist_res res = {
6022 struct rpc_message msg = {
6023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6029 dprintk("--> %s\n", __func__);
6030 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6032 dprintk("<-- %s status=%d\n", __func__, status);
6036 int nfs4_proc_getdevicelist(struct nfs_server *server,
6037 const struct nfs_fh *fh,
6038 struct pnfs_devicelist *devlist)
6040 struct nfs4_exception exception = { };
6044 err = nfs4_handle_exception(server,
6045 _nfs4_getdevicelist(server, fh, devlist),
6047 } while (exception.retry);
6049 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6050 err, devlist->num_devs);
6054 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6057 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6059 struct nfs4_getdeviceinfo_args args = {
6062 struct nfs4_getdeviceinfo_res res = {
6065 struct rpc_message msg = {
6066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6072 dprintk("--> %s\n", __func__);
6073 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6074 dprintk("<-- %s status=%d\n", __func__, status);
6079 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6081 struct nfs4_exception exception = { };
6085 err = nfs4_handle_exception(server,
6086 _nfs4_proc_getdeviceinfo(server, pdev),
6088 } while (exception.retry);
6091 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6093 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6095 struct nfs4_layoutcommit_data *data = calldata;
6096 struct nfs_server *server = NFS_SERVER(data->args.inode);
6098 if (nfs4_setup_sequence(server, &data->args.seq_args,
6099 &data->res.seq_res, task))
6101 rpc_call_start(task);
6105 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6107 struct nfs4_layoutcommit_data *data = calldata;
6108 struct nfs_server *server = NFS_SERVER(data->args.inode);
6110 if (!nfs4_sequence_done(task, &data->res.seq_res))
6113 switch (task->tk_status) { /* Just ignore these failures */
6114 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6115 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6116 case NFS4ERR_BADLAYOUT: /* no layout */
6117 case NFS4ERR_GRACE: /* loca_recalim always false */
6118 task->tk_status = 0;
6121 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6122 rpc_restart_call_prepare(task);
6126 if (task->tk_status == 0)
6127 nfs_post_op_update_inode_force_wcc(data->args.inode,
6131 static void nfs4_layoutcommit_release(void *calldata)
6133 struct nfs4_layoutcommit_data *data = calldata;
6134 struct pnfs_layout_segment *lseg, *tmp;
6135 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6137 pnfs_cleanup_layoutcommit(data);
6138 /* Matched by references in pnfs_set_layoutcommit */
6139 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6140 list_del_init(&lseg->pls_lc_list);
6141 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6146 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6147 smp_mb__after_clear_bit();
6148 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6150 put_rpccred(data->cred);
6154 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6155 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6156 .rpc_call_done = nfs4_layoutcommit_done,
6157 .rpc_release = nfs4_layoutcommit_release,
6161 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6163 struct rpc_message msg = {
6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6165 .rpc_argp = &data->args,
6166 .rpc_resp = &data->res,
6167 .rpc_cred = data->cred,
6169 struct rpc_task_setup task_setup_data = {
6170 .task = &data->task,
6171 .rpc_client = NFS_CLIENT(data->args.inode),
6172 .rpc_message = &msg,
6173 .callback_ops = &nfs4_layoutcommit_ops,
6174 .callback_data = data,
6175 .flags = RPC_TASK_ASYNC,
6177 struct rpc_task *task;
6180 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6181 "lbw: %llu inode %lu\n",
6182 data->task.tk_pid, sync,
6183 data->args.lastbytewritten,
6184 data->args.inode->i_ino);
6186 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6187 task = rpc_run_task(&task_setup_data);
6189 return PTR_ERR(task);
6192 status = nfs4_wait_for_completion_rpc_task(task);
6195 status = task->tk_status;
6197 dprintk("%s: status %d\n", __func__, status);
6203 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6204 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6206 struct nfs41_secinfo_no_name_args args = {
6207 .style = SECINFO_STYLE_CURRENT_FH,
6209 struct nfs4_secinfo_res res = {
6212 struct rpc_message msg = {
6213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6217 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6221 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6222 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6224 struct nfs4_exception exception = { };
6227 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6230 case -NFS4ERR_WRONGSEC:
6231 case -NFS4ERR_NOTSUPP:
6234 err = nfs4_handle_exception(server, err, &exception);
6236 } while (exception.retry);
6241 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6242 struct nfs_fsinfo *info)
6246 rpc_authflavor_t flavor;
6247 struct nfs4_secinfo_flavors *flavors;
6249 page = alloc_page(GFP_KERNEL);
6255 flavors = page_address(page);
6256 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6259 * Fall back on "guess and check" method if
6260 * the server doesn't support SECINFO_NO_NAME
6262 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6263 err = nfs4_find_root_sec(server, fhandle, info);
6269 flavor = nfs_find_best_sec(flavors);
6271 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6281 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6284 struct nfs41_test_stateid_args args = {
6287 struct nfs41_test_stateid_res res;
6288 struct rpc_message msg = {
6289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6294 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6295 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6297 if (status == NFS_OK)
6302 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6304 struct nfs4_exception exception = { };
6307 err = nfs4_handle_exception(server,
6308 _nfs41_test_stateid(server, stateid),
6310 } while (exception.retry);
6314 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6316 struct nfs41_free_stateid_args args = {
6319 struct nfs41_free_stateid_res res;
6320 struct rpc_message msg = {
6321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6326 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6327 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6330 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6332 struct nfs4_exception exception = { };
6335 err = nfs4_handle_exception(server,
6336 _nfs4_free_stateid(server, stateid),
6338 } while (exception.retry);
6342 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6343 const nfs4_stateid *s2)
6345 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6348 if (s1->seqid == s2->seqid)
6350 if (s1->seqid == 0 || s2->seqid == 0)
6356 #endif /* CONFIG_NFS_V4_1 */
6358 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6359 const nfs4_stateid *s2)
6361 return nfs4_stateid_match(s1, s2);
6365 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6366 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6367 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6368 .recover_open = nfs4_open_reclaim,
6369 .recover_lock = nfs4_lock_reclaim,
6370 .establish_clid = nfs4_init_clientid,
6371 .get_clid_cred = nfs4_get_setclientid_cred,
6374 #if defined(CONFIG_NFS_V4_1)
6375 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6376 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6377 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6378 .recover_open = nfs4_open_reclaim,
6379 .recover_lock = nfs4_lock_reclaim,
6380 .establish_clid = nfs41_init_clientid,
6381 .get_clid_cred = nfs4_get_exchange_id_cred,
6382 .reclaim_complete = nfs41_proc_reclaim_complete,
6384 #endif /* CONFIG_NFS_V4_1 */
6386 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6387 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6388 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6389 .recover_open = nfs4_open_expired,
6390 .recover_lock = nfs4_lock_expired,
6391 .establish_clid = nfs4_init_clientid,
6392 .get_clid_cred = nfs4_get_setclientid_cred,
6395 #if defined(CONFIG_NFS_V4_1)
6396 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6397 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6398 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6399 .recover_open = nfs41_open_expired,
6400 .recover_lock = nfs41_lock_expired,
6401 .establish_clid = nfs41_init_clientid,
6402 .get_clid_cred = nfs4_get_exchange_id_cred,
6404 #endif /* CONFIG_NFS_V4_1 */
6406 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6407 .sched_state_renewal = nfs4_proc_async_renew,
6408 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6409 .renew_lease = nfs4_proc_renew,
6412 #if defined(CONFIG_NFS_V4_1)
6413 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6414 .sched_state_renewal = nfs41_proc_async_sequence,
6415 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6416 .renew_lease = nfs4_proc_sequence,
6420 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6422 .call_sync = _nfs4_call_sync,
6423 .match_stateid = nfs4_match_stateid,
6424 .find_root_sec = nfs4_find_root_sec,
6425 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6426 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6427 .state_renewal_ops = &nfs40_state_renewal_ops,
6430 #if defined(CONFIG_NFS_V4_1)
6431 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6433 .call_sync = _nfs4_call_sync_session,
6434 .match_stateid = nfs41_match_stateid,
6435 .find_root_sec = nfs41_find_root_sec,
6436 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6437 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6438 .state_renewal_ops = &nfs41_state_renewal_ops,
6442 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6443 [0] = &nfs_v4_0_minor_ops,
6444 #if defined(CONFIG_NFS_V4_1)
6445 [1] = &nfs_v4_1_minor_ops,
6449 static const struct inode_operations nfs4_file_inode_operations = {
6450 .permission = nfs_permission,
6451 .getattr = nfs_getattr,
6452 .setattr = nfs_setattr,
6453 .getxattr = generic_getxattr,
6454 .setxattr = generic_setxattr,
6455 .listxattr = generic_listxattr,
6456 .removexattr = generic_removexattr,
6459 const struct nfs_rpc_ops nfs_v4_clientops = {
6460 .version = 4, /* protocol version */
6461 .dentry_ops = &nfs4_dentry_operations,
6462 .dir_inode_ops = &nfs4_dir_inode_operations,
6463 .file_inode_ops = &nfs4_file_inode_operations,
6464 .file_ops = &nfs4_file_operations,
6465 .getroot = nfs4_proc_get_root,
6466 .getattr = nfs4_proc_getattr,
6467 .setattr = nfs4_proc_setattr,
6468 .lookup = nfs4_proc_lookup,
6469 .access = nfs4_proc_access,
6470 .readlink = nfs4_proc_readlink,
6471 .create = nfs4_proc_create,
6472 .remove = nfs4_proc_remove,
6473 .unlink_setup = nfs4_proc_unlink_setup,
6474 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6475 .unlink_done = nfs4_proc_unlink_done,
6476 .rename = nfs4_proc_rename,
6477 .rename_setup = nfs4_proc_rename_setup,
6478 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6479 .rename_done = nfs4_proc_rename_done,
6480 .link = nfs4_proc_link,
6481 .symlink = nfs4_proc_symlink,
6482 .mkdir = nfs4_proc_mkdir,
6483 .rmdir = nfs4_proc_remove,
6484 .readdir = nfs4_proc_readdir,
6485 .mknod = nfs4_proc_mknod,
6486 .statfs = nfs4_proc_statfs,
6487 .fsinfo = nfs4_proc_fsinfo,
6488 .pathconf = nfs4_proc_pathconf,
6489 .set_capabilities = nfs4_server_capabilities,
6490 .decode_dirent = nfs4_decode_dirent,
6491 .read_setup = nfs4_proc_read_setup,
6492 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6493 .read_done = nfs4_read_done,
6494 .write_setup = nfs4_proc_write_setup,
6495 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6496 .write_done = nfs4_write_done,
6497 .commit_setup = nfs4_proc_commit_setup,
6498 .commit_done = nfs4_commit_done,
6499 .lock = nfs4_proc_lock,
6500 .clear_acl_cache = nfs4_zap_acl_attr,
6501 .close_context = nfs4_close_context,
6502 .open_context = nfs4_atomic_open,
6503 .init_client = nfs4_init_client,
6504 .secinfo = nfs4_proc_secinfo,
6507 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6508 .prefix = XATTR_NAME_NFSV4_ACL,
6509 .list = nfs4_xattr_list_nfs4_acl,
6510 .get = nfs4_xattr_get_nfs4_acl,
6511 .set = nfs4_xattr_set_nfs4_acl,
6514 const struct xattr_handler *nfs4_xattr_handlers[] = {
6515 &nfs4_xattr_nfs4_acl_handler,
6519 module_param(max_session_slots, ushort, 0644);
6520 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6521 "requests the client will negotiate");