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/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
60 #include "delegation.h"
66 #define NFSDBG_FACILITY NFSDBG_PROC
68 #define NFS4_POLL_RETRY_MIN (HZ/10)
69 #define NFS4_POLL_RETRY_MAX (15*HZ)
71 #define NFS4_MAX_LOOP_ON_RECOVER (10)
74 static int _nfs4_proc_open(struct nfs4_opendata *data);
75 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
76 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
77 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
78 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
79 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
80 struct nfs_fattr *fattr, struct iattr *sattr,
81 struct nfs4_state *state);
82 #ifdef CONFIG_NFS_V4_1
83 static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
84 static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
86 /* Prevent leaks of NFSv4 errors into userland */
87 static int nfs4_map_errors(int err)
92 case -NFS4ERR_RESOURCE:
94 case -NFS4ERR_WRONGSEC:
96 case -NFS4ERR_BADOWNER:
97 case -NFS4ERR_BADNAME:
100 dprintk("%s could not handle NFSv4 error %d\n",
108 * This is our standard bitmap for GETATTR requests.
110 const u32 nfs4_fattr_bitmap[2] = {
112 | FATTR4_WORD0_CHANGE
115 | FATTR4_WORD0_FILEID,
117 | FATTR4_WORD1_NUMLINKS
119 | FATTR4_WORD1_OWNER_GROUP
120 | FATTR4_WORD1_RAWDEV
121 | FATTR4_WORD1_SPACE_USED
122 | FATTR4_WORD1_TIME_ACCESS
123 | FATTR4_WORD1_TIME_METADATA
124 | FATTR4_WORD1_TIME_MODIFY
127 const u32 nfs4_statfs_bitmap[2] = {
128 FATTR4_WORD0_FILES_AVAIL
129 | FATTR4_WORD0_FILES_FREE
130 | FATTR4_WORD0_FILES_TOTAL,
131 FATTR4_WORD1_SPACE_AVAIL
132 | FATTR4_WORD1_SPACE_FREE
133 | FATTR4_WORD1_SPACE_TOTAL
136 const u32 nfs4_pathconf_bitmap[2] = {
138 | FATTR4_WORD0_MAXNAME,
142 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
143 | FATTR4_WORD0_MAXREAD
144 | FATTR4_WORD0_MAXWRITE
145 | FATTR4_WORD0_LEASE_TIME,
146 FATTR4_WORD1_TIME_DELTA
147 | FATTR4_WORD1_FS_LAYOUT_TYPES,
148 FATTR4_WORD2_LAYOUT_BLKSIZE
151 const u32 nfs4_fs_locations_bitmap[2] = {
153 | FATTR4_WORD0_CHANGE
156 | FATTR4_WORD0_FILEID
157 | FATTR4_WORD0_FS_LOCATIONS,
159 | FATTR4_WORD1_NUMLINKS
161 | FATTR4_WORD1_OWNER_GROUP
162 | FATTR4_WORD1_RAWDEV
163 | FATTR4_WORD1_SPACE_USED
164 | FATTR4_WORD1_TIME_ACCESS
165 | FATTR4_WORD1_TIME_METADATA
166 | FATTR4_WORD1_TIME_MODIFY
167 | FATTR4_WORD1_MOUNTED_ON_FILEID
170 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
171 struct nfs4_readdir_arg *readdir)
175 BUG_ON(readdir->count < 80);
177 readdir->cookie = cookie;
178 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
183 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
188 * NFSv4 servers do not return entries for '.' and '..'
189 * Therefore, we fake these entries here. We let '.'
190 * have cookie 0 and '..' have cookie 1. Note that
191 * when talking to the server, we always send cookie 0
194 start = p = kmap_atomic(*readdir->pages, KM_USER0);
197 *p++ = xdr_one; /* next */
198 *p++ = xdr_zero; /* cookie, first word */
199 *p++ = xdr_one; /* cookie, second word */
200 *p++ = xdr_one; /* entry len */
201 memcpy(p, ".\0\0\0", 4); /* entry */
203 *p++ = xdr_one; /* bitmap length */
204 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
205 *p++ = htonl(8); /* attribute buffer length */
206 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
209 *p++ = xdr_one; /* next */
210 *p++ = xdr_zero; /* cookie, first word */
211 *p++ = xdr_two; /* cookie, second word */
212 *p++ = xdr_two; /* entry len */
213 memcpy(p, "..\0\0", 4); /* entry */
215 *p++ = xdr_one; /* bitmap length */
216 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
217 *p++ = htonl(8); /* attribute buffer length */
218 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
220 readdir->pgbase = (char *)p - (char *)start;
221 readdir->count -= readdir->pgbase;
222 kunmap_atomic(start, KM_USER0);
225 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
231 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
232 nfs_wait_bit_killable, TASK_KILLABLE);
236 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
243 *timeout = NFS4_POLL_RETRY_MIN;
244 if (*timeout > NFS4_POLL_RETRY_MAX)
245 *timeout = NFS4_POLL_RETRY_MAX;
246 schedule_timeout_killable(*timeout);
247 if (fatal_signal_pending(current))
253 /* This is the error handling routine for processes that are allowed
256 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
258 struct nfs_client *clp = server->nfs_client;
259 struct nfs4_state *state = exception->state;
260 struct inode *inode = exception->inode;
263 exception->retry = 0;
267 case -NFS4ERR_OPENMODE:
268 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
269 nfs_inode_return_delegation(inode);
270 exception->retry = 1;
275 nfs4_schedule_stateid_recovery(server, state);
276 goto wait_on_recovery;
277 case -NFS4ERR_DELEG_REVOKED:
278 case -NFS4ERR_ADMIN_REVOKED:
279 case -NFS4ERR_BAD_STATEID:
282 nfs_remove_bad_delegation(state->inode);
283 nfs4_schedule_stateid_recovery(server, state);
284 goto wait_on_recovery;
285 case -NFS4ERR_EXPIRED:
287 nfs4_schedule_stateid_recovery(server, state);
288 case -NFS4ERR_STALE_STATEID:
289 case -NFS4ERR_STALE_CLIENTID:
290 nfs4_schedule_lease_recovery(clp);
291 goto wait_on_recovery;
292 #if defined(CONFIG_NFS_V4_1)
293 case -NFS4ERR_BADSESSION:
294 case -NFS4ERR_BADSLOT:
295 case -NFS4ERR_BAD_HIGH_SLOT:
296 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
297 case -NFS4ERR_DEADSESSION:
298 case -NFS4ERR_SEQ_FALSE_RETRY:
299 case -NFS4ERR_SEQ_MISORDERED:
300 dprintk("%s ERROR: %d Reset session\n", __func__,
302 nfs4_schedule_session_recovery(clp->cl_session);
303 exception->retry = 1;
305 #endif /* defined(CONFIG_NFS_V4_1) */
306 case -NFS4ERR_FILE_OPEN:
307 if (exception->timeout > HZ) {
308 /* We have retried a decent amount, time to
317 ret = nfs4_delay(server->client, &exception->timeout);
320 case -NFS4ERR_RETRY_UNCACHED_REP:
321 case -NFS4ERR_OLD_STATEID:
322 exception->retry = 1;
324 case -NFS4ERR_BADOWNER:
325 /* The following works around a Linux server bug! */
326 case -NFS4ERR_BADNAME:
327 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
328 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
329 exception->retry = 1;
330 printk(KERN_WARNING "NFS: v4 server %s "
331 "does not accept raw "
333 "Reenabling the idmapper.\n",
334 server->nfs_client->cl_hostname);
337 /* We failed to handle the error */
338 return nfs4_map_errors(ret);
340 ret = nfs4_wait_clnt_recover(clp);
342 exception->retry = 1;
347 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
349 spin_lock(&clp->cl_lock);
350 if (time_before(clp->cl_last_renewal,timestamp))
351 clp->cl_last_renewal = timestamp;
352 spin_unlock(&clp->cl_lock);
355 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
357 do_renew_lease(server->nfs_client, timestamp);
360 #if defined(CONFIG_NFS_V4_1)
363 * nfs4_free_slot - free a slot and efficiently update slot table.
365 * freeing a slot is trivially done by clearing its respective bit
367 * If the freed slotid equals highest_used_slotid we want to update it
368 * so that the server would be able to size down the slot table if needed,
369 * otherwise we know that the highest_used_slotid is still in use.
370 * When updating highest_used_slotid there may be "holes" in the bitmap
371 * so we need to scan down from highest_used_slotid to 0 looking for the now
372 * highest slotid in use.
373 * If none found, highest_used_slotid is set to -1.
375 * Must be called while holding tbl->slot_tbl_lock
378 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
380 int free_slotid = free_slot - tbl->slots;
381 int slotid = free_slotid;
383 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
384 /* clear used bit in bitmap */
385 __clear_bit(slotid, tbl->used_slots);
387 /* update highest_used_slotid when it is freed */
388 if (slotid == tbl->highest_used_slotid) {
389 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
390 if (slotid < tbl->max_slots)
391 tbl->highest_used_slotid = slotid;
393 tbl->highest_used_slotid = -1;
395 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
396 free_slotid, tbl->highest_used_slotid);
400 * Signal state manager thread if session fore channel is drained
402 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
404 struct rpc_task *task;
406 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
407 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
409 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
413 if (ses->fc_slot_table.highest_used_slotid != -1)
416 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
417 complete(&ses->fc_slot_table.complete);
421 * Signal state manager thread if session back channel is drained
423 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
425 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
426 ses->bc_slot_table.highest_used_slotid != -1)
428 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
429 complete(&ses->bc_slot_table.complete);
432 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
434 struct nfs4_slot_table *tbl;
436 tbl = &res->sr_session->fc_slot_table;
438 /* just wake up the next guy waiting since
439 * we may have not consumed a slot after all */
440 dprintk("%s: No slot\n", __func__);
444 spin_lock(&tbl->slot_tbl_lock);
445 nfs4_free_slot(tbl, res->sr_slot);
446 nfs4_check_drain_fc_complete(res->sr_session);
447 spin_unlock(&tbl->slot_tbl_lock);
451 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
453 unsigned long timestamp;
454 struct nfs_client *clp;
457 * sr_status remains 1 if an RPC level error occurred. The server
458 * may or may not have processed the sequence operation..
459 * Proceed as if the server received and processed the sequence
462 if (res->sr_status == 1)
463 res->sr_status = NFS_OK;
465 /* don't increment the sequence number if the task wasn't sent */
466 if (!RPC_WAS_SENT(task))
469 /* Check the SEQUENCE operation status */
470 switch (res->sr_status) {
472 /* Update the slot's sequence and clientid lease timer */
473 ++res->sr_slot->seq_nr;
474 timestamp = res->sr_renewal_time;
475 clp = res->sr_session->clp;
476 do_renew_lease(clp, timestamp);
477 /* Check sequence flags */
478 if (res->sr_status_flags != 0)
479 nfs4_schedule_lease_recovery(clp);
482 /* The server detected a resend of the RPC call and
483 * returned NFS4ERR_DELAY as per Section 2.10.6.2
486 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
488 res->sr_slot - res->sr_session->fc_slot_table.slots,
489 res->sr_slot->seq_nr);
492 /* Just update the slot sequence no. */
493 ++res->sr_slot->seq_nr;
496 /* The session may be reset by one of the error handlers. */
497 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
498 nfs41_sequence_free_slot(res);
501 if (!rpc_restart_call(task))
503 rpc_delay(task, NFS4_POLL_RETRY_MAX);
507 static int nfs4_sequence_done(struct rpc_task *task,
508 struct nfs4_sequence_res *res)
510 if (res->sr_session == NULL)
512 return nfs41_sequence_done(task, res);
516 * nfs4_find_slot - efficiently look for a free slot
518 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
519 * If found, we mark the slot as used, update the highest_used_slotid,
520 * and respectively set up the sequence operation args.
521 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
523 * Note: must be called with under the slot_tbl_lock.
526 nfs4_find_slot(struct nfs4_slot_table *tbl)
529 u8 ret_id = NFS4_MAX_SLOT_TABLE;
530 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
532 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
533 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
535 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
536 if (slotid >= tbl->max_slots)
538 __set_bit(slotid, tbl->used_slots);
539 if (slotid > tbl->highest_used_slotid)
540 tbl->highest_used_slotid = slotid;
543 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
544 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
548 int nfs41_setup_sequence(struct nfs4_session *session,
549 struct nfs4_sequence_args *args,
550 struct nfs4_sequence_res *res,
552 struct rpc_task *task)
554 struct nfs4_slot *slot;
555 struct nfs4_slot_table *tbl;
558 dprintk("--> %s\n", __func__);
559 /* slot already allocated? */
560 if (res->sr_slot != NULL)
563 tbl = &session->fc_slot_table;
565 spin_lock(&tbl->slot_tbl_lock);
566 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
567 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
569 * The state manager will wait until the slot table is empty.
570 * Schedule the reset thread
572 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
573 spin_unlock(&tbl->slot_tbl_lock);
574 dprintk("%s Schedule Session Reset\n", __func__);
578 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
579 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
580 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
581 spin_unlock(&tbl->slot_tbl_lock);
582 dprintk("%s enforce FIFO order\n", __func__);
586 slotid = nfs4_find_slot(tbl);
587 if (slotid == NFS4_MAX_SLOT_TABLE) {
588 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
589 spin_unlock(&tbl->slot_tbl_lock);
590 dprintk("<-- %s: no free slots\n", __func__);
593 spin_unlock(&tbl->slot_tbl_lock);
595 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
596 slot = tbl->slots + slotid;
597 args->sa_session = session;
598 args->sa_slotid = slotid;
599 args->sa_cache_this = cache_reply;
601 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
603 res->sr_session = session;
605 res->sr_renewal_time = jiffies;
606 res->sr_status_flags = 0;
608 * sr_status is only set in decode_sequence, and so will remain
609 * set to 1 if an rpc level failure occurs.
614 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
616 int nfs4_setup_sequence(const struct nfs_server *server,
617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
620 struct rpc_task *task)
622 struct nfs4_session *session = nfs4_get_session(server);
625 if (session == NULL) {
626 args->sa_session = NULL;
627 res->sr_session = NULL;
631 dprintk("--> %s clp %p session %p sr_slot %td\n",
632 __func__, session->clp, session, res->sr_slot ?
633 res->sr_slot - session->fc_slot_table.slots : -1);
635 ret = nfs41_setup_sequence(session, args, res, cache_reply,
638 dprintk("<-- %s status=%d\n", __func__, ret);
642 struct nfs41_call_sync_data {
643 const struct nfs_server *seq_server;
644 struct nfs4_sequence_args *seq_args;
645 struct nfs4_sequence_res *seq_res;
649 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
651 struct nfs41_call_sync_data *data = calldata;
653 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
655 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
656 data->seq_res, data->cache_reply, task))
658 rpc_call_start(task);
661 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
663 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
664 nfs41_call_sync_prepare(task, calldata);
667 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
669 struct nfs41_call_sync_data *data = calldata;
671 nfs41_sequence_done(task, data->seq_res);
674 struct rpc_call_ops nfs41_call_sync_ops = {
675 .rpc_call_prepare = nfs41_call_sync_prepare,
676 .rpc_call_done = nfs41_call_sync_done,
679 struct rpc_call_ops nfs41_call_priv_sync_ops = {
680 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
681 .rpc_call_done = nfs41_call_sync_done,
684 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
685 struct nfs_server *server,
686 struct rpc_message *msg,
687 struct nfs4_sequence_args *args,
688 struct nfs4_sequence_res *res,
693 struct rpc_task *task;
694 struct nfs41_call_sync_data data = {
695 .seq_server = server,
698 .cache_reply = cache_reply,
700 struct rpc_task_setup task_setup = {
703 .callback_ops = &nfs41_call_sync_ops,
704 .callback_data = &data
709 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
710 task = rpc_run_task(&task_setup);
714 ret = task->tk_status;
720 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
721 struct nfs_server *server,
722 struct rpc_message *msg,
723 struct nfs4_sequence_args *args,
724 struct nfs4_sequence_res *res,
727 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
731 static int nfs4_sequence_done(struct rpc_task *task,
732 struct nfs4_sequence_res *res)
736 #endif /* CONFIG_NFS_V4_1 */
738 int _nfs4_call_sync(struct rpc_clnt *clnt,
739 struct nfs_server *server,
740 struct rpc_message *msg,
741 struct nfs4_sequence_args *args,
742 struct nfs4_sequence_res *res,
745 args->sa_session = res->sr_session = NULL;
746 return rpc_call_sync(clnt, msg, 0);
750 int nfs4_call_sync(struct rpc_clnt *clnt,
751 struct nfs_server *server,
752 struct rpc_message *msg,
753 struct nfs4_sequence_args *args,
754 struct nfs4_sequence_res *res,
757 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
758 args, res, cache_reply);
761 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
763 struct nfs_inode *nfsi = NFS_I(dir);
765 spin_lock(&dir->i_lock);
766 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
767 if (!cinfo->atomic || cinfo->before != dir->i_version)
768 nfs_force_lookup_revalidate(dir);
769 dir->i_version = cinfo->after;
770 spin_unlock(&dir->i_lock);
773 struct nfs4_opendata {
775 struct nfs_openargs o_arg;
776 struct nfs_openres o_res;
777 struct nfs_open_confirmargs c_arg;
778 struct nfs_open_confirmres c_res;
779 struct nfs_fattr f_attr;
780 struct nfs_fattr dir_attr;
782 struct dentry *dentry;
783 struct nfs4_state_owner *owner;
784 struct nfs4_state *state;
786 unsigned long timestamp;
787 unsigned int rpc_done : 1;
793 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
795 p->o_res.f_attr = &p->f_attr;
796 p->o_res.dir_attr = &p->dir_attr;
797 p->o_res.seqid = p->o_arg.seqid;
798 p->c_res.seqid = p->c_arg.seqid;
799 p->o_res.server = p->o_arg.server;
800 nfs_fattr_init(&p->f_attr);
801 nfs_fattr_init(&p->dir_attr);
804 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
805 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
806 const struct iattr *attrs,
809 struct dentry *parent = dget_parent(dentry);
810 struct inode *dir = parent->d_inode;
811 struct nfs_server *server = NFS_SERVER(dir);
812 struct nfs4_opendata *p;
814 p = kzalloc(sizeof(*p), gfp_mask);
817 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
818 if (p->o_arg.seqid == NULL)
820 nfs_sb_active(dentry->d_sb);
821 p->dentry = dget(dentry);
824 atomic_inc(&sp->so_count);
825 p->o_arg.fh = NFS_FH(dir);
826 p->o_arg.open_flags = flags;
827 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
828 p->o_arg.clientid = server->nfs_client->cl_clientid;
829 p->o_arg.id = sp->so_owner_id.id;
830 p->o_arg.name = &dentry->d_name;
831 p->o_arg.server = server;
832 p->o_arg.bitmask = server->attr_bitmask;
833 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
834 if (flags & O_CREAT) {
837 p->o_arg.u.attrs = &p->attrs;
838 memcpy(&p->attrs, attrs, sizeof(p->attrs));
839 s = (u32 *) p->o_arg.u.verifier.data;
843 p->c_arg.fh = &p->o_res.fh;
844 p->c_arg.stateid = &p->o_res.stateid;
845 p->c_arg.seqid = p->o_arg.seqid;
846 nfs4_init_opendata_res(p);
856 static void nfs4_opendata_free(struct kref *kref)
858 struct nfs4_opendata *p = container_of(kref,
859 struct nfs4_opendata, kref);
860 struct super_block *sb = p->dentry->d_sb;
862 nfs_free_seqid(p->o_arg.seqid);
863 if (p->state != NULL)
864 nfs4_put_open_state(p->state);
865 nfs4_put_state_owner(p->owner);
872 static void nfs4_opendata_put(struct nfs4_opendata *p)
875 kref_put(&p->kref, nfs4_opendata_free);
878 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
882 ret = rpc_wait_for_completion_task(task);
886 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
890 if (open_mode & O_EXCL)
892 switch (mode & (FMODE_READ|FMODE_WRITE)) {
894 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
895 && state->n_rdonly != 0;
898 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
899 && state->n_wronly != 0;
901 case FMODE_READ|FMODE_WRITE:
902 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
903 && state->n_rdwr != 0;
909 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
911 if (delegation == NULL)
913 if ((delegation->type & fmode) != fmode)
915 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
917 nfs_mark_delegation_referenced(delegation);
921 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
930 case FMODE_READ|FMODE_WRITE:
933 nfs4_state_set_mode_locked(state, state->state | fmode);
936 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
938 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
939 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
940 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
943 set_bit(NFS_O_RDONLY_STATE, &state->flags);
946 set_bit(NFS_O_WRONLY_STATE, &state->flags);
948 case FMODE_READ|FMODE_WRITE:
949 set_bit(NFS_O_RDWR_STATE, &state->flags);
953 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
955 write_seqlock(&state->seqlock);
956 nfs_set_open_stateid_locked(state, stateid, fmode);
957 write_sequnlock(&state->seqlock);
960 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
963 * Protect the call to nfs4_state_set_mode_locked and
964 * serialise the stateid update
966 write_seqlock(&state->seqlock);
967 if (deleg_stateid != NULL) {
968 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
969 set_bit(NFS_DELEGATED_STATE, &state->flags);
971 if (open_stateid != NULL)
972 nfs_set_open_stateid_locked(state, open_stateid, fmode);
973 write_sequnlock(&state->seqlock);
974 spin_lock(&state->owner->so_lock);
975 update_open_stateflags(state, fmode);
976 spin_unlock(&state->owner->so_lock);
979 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
981 struct nfs_inode *nfsi = NFS_I(state->inode);
982 struct nfs_delegation *deleg_cur;
985 fmode &= (FMODE_READ|FMODE_WRITE);
988 deleg_cur = rcu_dereference(nfsi->delegation);
989 if (deleg_cur == NULL)
992 spin_lock(&deleg_cur->lock);
993 if (nfsi->delegation != deleg_cur ||
994 (deleg_cur->type & fmode) != fmode)
995 goto no_delegation_unlock;
997 if (delegation == NULL)
998 delegation = &deleg_cur->stateid;
999 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1000 goto no_delegation_unlock;
1002 nfs_mark_delegation_referenced(deleg_cur);
1003 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1005 no_delegation_unlock:
1006 spin_unlock(&deleg_cur->lock);
1010 if (!ret && open_stateid != NULL) {
1011 __update_open_stateid(state, open_stateid, NULL, fmode);
1019 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1021 struct nfs_delegation *delegation;
1024 delegation = rcu_dereference(NFS_I(inode)->delegation);
1025 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1030 nfs_inode_return_delegation(inode);
1033 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1035 struct nfs4_state *state = opendata->state;
1036 struct nfs_inode *nfsi = NFS_I(state->inode);
1037 struct nfs_delegation *delegation;
1038 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1039 fmode_t fmode = opendata->o_arg.fmode;
1040 nfs4_stateid stateid;
1044 if (can_open_cached(state, fmode, open_mode)) {
1045 spin_lock(&state->owner->so_lock);
1046 if (can_open_cached(state, fmode, open_mode)) {
1047 update_open_stateflags(state, fmode);
1048 spin_unlock(&state->owner->so_lock);
1049 goto out_return_state;
1051 spin_unlock(&state->owner->so_lock);
1054 delegation = rcu_dereference(nfsi->delegation);
1055 if (!can_open_delegated(delegation, fmode)) {
1059 /* Save the delegation */
1060 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1062 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1067 /* Try to update the stateid using the delegation */
1068 if (update_open_stateid(state, NULL, &stateid, fmode))
1069 goto out_return_state;
1072 return ERR_PTR(ret);
1074 atomic_inc(&state->count);
1078 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1080 struct inode *inode;
1081 struct nfs4_state *state = NULL;
1082 struct nfs_delegation *delegation;
1085 if (!data->rpc_done) {
1086 state = nfs4_try_open_cached(data);
1091 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1093 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1094 ret = PTR_ERR(inode);
1098 state = nfs4_get_open_state(inode, data->owner);
1101 if (data->o_res.delegation_type != 0) {
1102 int delegation_flags = 0;
1105 delegation = rcu_dereference(NFS_I(inode)->delegation);
1107 delegation_flags = delegation->flags;
1109 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1110 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1111 "returning a delegation for "
1112 "OPEN(CLAIM_DELEGATE_CUR)\n",
1113 NFS_CLIENT(inode)->cl_server);
1114 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1115 nfs_inode_set_delegation(state->inode,
1116 data->owner->so_cred,
1119 nfs_inode_reclaim_delegation(state->inode,
1120 data->owner->so_cred,
1124 update_open_stateid(state, &data->o_res.stateid, NULL,
1132 return ERR_PTR(ret);
1135 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1137 struct nfs_inode *nfsi = NFS_I(state->inode);
1138 struct nfs_open_context *ctx;
1140 spin_lock(&state->inode->i_lock);
1141 list_for_each_entry(ctx, &nfsi->open_files, list) {
1142 if (ctx->state != state)
1144 get_nfs_open_context(ctx);
1145 spin_unlock(&state->inode->i_lock);
1148 spin_unlock(&state->inode->i_lock);
1149 return ERR_PTR(-ENOENT);
1152 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1154 struct nfs4_opendata *opendata;
1156 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1157 if (opendata == NULL)
1158 return ERR_PTR(-ENOMEM);
1159 opendata->state = state;
1160 atomic_inc(&state->count);
1164 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1166 struct nfs4_state *newstate;
1169 opendata->o_arg.open_flags = 0;
1170 opendata->o_arg.fmode = fmode;
1171 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1172 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1173 nfs4_init_opendata_res(opendata);
1174 ret = _nfs4_recover_proc_open(opendata);
1177 newstate = nfs4_opendata_to_nfs4_state(opendata);
1178 if (IS_ERR(newstate))
1179 return PTR_ERR(newstate);
1180 nfs4_close_state(newstate, fmode);
1185 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1187 struct nfs4_state *newstate;
1190 /* memory barrier prior to reading state->n_* */
1191 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1193 if (state->n_rdwr != 0) {
1194 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1195 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1198 if (newstate != state)
1201 if (state->n_wronly != 0) {
1202 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1203 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1206 if (newstate != state)
1209 if (state->n_rdonly != 0) {
1210 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1211 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1214 if (newstate != state)
1218 * We may have performed cached opens for all three recoveries.
1219 * Check if we need to update the current stateid.
1221 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1222 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1223 write_seqlock(&state->seqlock);
1224 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1225 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1226 write_sequnlock(&state->seqlock);
1233 * reclaim state on the server after a reboot.
1235 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1237 struct nfs_delegation *delegation;
1238 struct nfs4_opendata *opendata;
1239 fmode_t delegation_type = 0;
1242 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1243 if (IS_ERR(opendata))
1244 return PTR_ERR(opendata);
1245 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1246 opendata->o_arg.fh = NFS_FH(state->inode);
1248 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1249 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1250 delegation_type = delegation->type;
1252 opendata->o_arg.u.delegation_type = delegation_type;
1253 status = nfs4_open_recover(opendata, state);
1254 nfs4_opendata_put(opendata);
1258 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1260 struct nfs_server *server = NFS_SERVER(state->inode);
1261 struct nfs4_exception exception = { };
1264 err = _nfs4_do_open_reclaim(ctx, state);
1265 if (err != -NFS4ERR_DELAY)
1267 nfs4_handle_exception(server, err, &exception);
1268 } while (exception.retry);
1272 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1274 struct nfs_open_context *ctx;
1277 ctx = nfs4_state_find_open_context(state);
1279 return PTR_ERR(ctx);
1280 ret = nfs4_do_open_reclaim(ctx, state);
1281 put_nfs_open_context(ctx);
1285 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1287 struct nfs4_opendata *opendata;
1290 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1291 if (IS_ERR(opendata))
1292 return PTR_ERR(opendata);
1293 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1294 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1295 sizeof(opendata->o_arg.u.delegation.data));
1296 ret = nfs4_open_recover(opendata, state);
1297 nfs4_opendata_put(opendata);
1301 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1303 struct nfs4_exception exception = { };
1304 struct nfs_server *server = NFS_SERVER(state->inode);
1307 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1313 case -NFS4ERR_BADSESSION:
1314 case -NFS4ERR_BADSLOT:
1315 case -NFS4ERR_BAD_HIGH_SLOT:
1316 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1317 case -NFS4ERR_DEADSESSION:
1318 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1320 case -NFS4ERR_STALE_CLIENTID:
1321 case -NFS4ERR_STALE_STATEID:
1322 case -NFS4ERR_EXPIRED:
1323 /* Don't recall a delegation if it was lost */
1324 nfs4_schedule_lease_recovery(server->nfs_client);
1328 * The show must go on: exit, but mark the
1329 * stateid as needing recovery.
1331 case -NFS4ERR_DELEG_REVOKED:
1332 case -NFS4ERR_ADMIN_REVOKED:
1333 case -NFS4ERR_BAD_STATEID:
1334 nfs_inode_find_state_and_recover(state->inode,
1336 nfs4_schedule_stateid_recovery(server, state);
1339 * User RPCSEC_GSS context has expired.
1340 * We cannot recover this stateid now, so
1341 * skip it and allow recovery thread to
1348 err = nfs4_handle_exception(server, err, &exception);
1349 } while (exception.retry);
1354 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1356 struct nfs4_opendata *data = calldata;
1358 data->rpc_status = task->tk_status;
1359 if (data->rpc_status == 0) {
1360 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1361 sizeof(data->o_res.stateid.data));
1362 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1363 renew_lease(data->o_res.server, data->timestamp);
1368 static void nfs4_open_confirm_release(void *calldata)
1370 struct nfs4_opendata *data = calldata;
1371 struct nfs4_state *state = NULL;
1373 /* If this request hasn't been cancelled, do nothing */
1374 if (data->cancelled == 0)
1376 /* In case of error, no cleanup! */
1377 if (!data->rpc_done)
1379 state = nfs4_opendata_to_nfs4_state(data);
1381 nfs4_close_state(state, data->o_arg.fmode);
1383 nfs4_opendata_put(data);
1386 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1387 .rpc_call_done = nfs4_open_confirm_done,
1388 .rpc_release = nfs4_open_confirm_release,
1392 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1394 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1396 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1397 struct rpc_task *task;
1398 struct rpc_message msg = {
1399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1400 .rpc_argp = &data->c_arg,
1401 .rpc_resp = &data->c_res,
1402 .rpc_cred = data->owner->so_cred,
1404 struct rpc_task_setup task_setup_data = {
1405 .rpc_client = server->client,
1406 .rpc_message = &msg,
1407 .callback_ops = &nfs4_open_confirm_ops,
1408 .callback_data = data,
1409 .workqueue = nfsiod_workqueue,
1410 .flags = RPC_TASK_ASYNC,
1414 kref_get(&data->kref);
1416 data->rpc_status = 0;
1417 data->timestamp = jiffies;
1418 task = rpc_run_task(&task_setup_data);
1420 return PTR_ERR(task);
1421 status = nfs4_wait_for_completion_rpc_task(task);
1423 data->cancelled = 1;
1426 status = data->rpc_status;
1431 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1433 struct nfs4_opendata *data = calldata;
1434 struct nfs4_state_owner *sp = data->owner;
1436 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1439 * Check if we still need to send an OPEN call, or if we can use
1440 * a delegation instead.
1442 if (data->state != NULL) {
1443 struct nfs_delegation *delegation;
1445 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1448 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1449 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1450 can_open_delegated(delegation, data->o_arg.fmode))
1451 goto unlock_no_action;
1454 /* Update sequence id. */
1455 data->o_arg.id = sp->so_owner_id.id;
1456 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1457 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1458 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1459 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1461 data->timestamp = jiffies;
1462 if (nfs4_setup_sequence(data->o_arg.server,
1463 &data->o_arg.seq_args,
1464 &data->o_res.seq_res, 1, task))
1466 rpc_call_start(task);
1471 task->tk_action = NULL;
1475 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1477 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1478 nfs4_open_prepare(task, calldata);
1481 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1483 struct nfs4_opendata *data = calldata;
1485 data->rpc_status = task->tk_status;
1487 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1490 if (task->tk_status == 0) {
1491 switch (data->o_res.f_attr->mode & S_IFMT) {
1495 data->rpc_status = -ELOOP;
1498 data->rpc_status = -EISDIR;
1501 data->rpc_status = -ENOTDIR;
1503 renew_lease(data->o_res.server, data->timestamp);
1504 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1505 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1510 static void nfs4_open_release(void *calldata)
1512 struct nfs4_opendata *data = calldata;
1513 struct nfs4_state *state = NULL;
1515 /* If this request hasn't been cancelled, do nothing */
1516 if (data->cancelled == 0)
1518 /* In case of error, no cleanup! */
1519 if (data->rpc_status != 0 || !data->rpc_done)
1521 /* In case we need an open_confirm, no cleanup! */
1522 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1524 state = nfs4_opendata_to_nfs4_state(data);
1526 nfs4_close_state(state, data->o_arg.fmode);
1528 nfs4_opendata_put(data);
1531 static const struct rpc_call_ops nfs4_open_ops = {
1532 .rpc_call_prepare = nfs4_open_prepare,
1533 .rpc_call_done = nfs4_open_done,
1534 .rpc_release = nfs4_open_release,
1537 static const struct rpc_call_ops nfs4_recover_open_ops = {
1538 .rpc_call_prepare = nfs4_recover_open_prepare,
1539 .rpc_call_done = nfs4_open_done,
1540 .rpc_release = nfs4_open_release,
1543 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1545 struct inode *dir = data->dir->d_inode;
1546 struct nfs_server *server = NFS_SERVER(dir);
1547 struct nfs_openargs *o_arg = &data->o_arg;
1548 struct nfs_openres *o_res = &data->o_res;
1549 struct rpc_task *task;
1550 struct rpc_message msg = {
1551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1554 .rpc_cred = data->owner->so_cred,
1556 struct rpc_task_setup task_setup_data = {
1557 .rpc_client = server->client,
1558 .rpc_message = &msg,
1559 .callback_ops = &nfs4_open_ops,
1560 .callback_data = data,
1561 .workqueue = nfsiod_workqueue,
1562 .flags = RPC_TASK_ASYNC,
1566 kref_get(&data->kref);
1568 data->rpc_status = 0;
1569 data->cancelled = 0;
1571 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1572 task = rpc_run_task(&task_setup_data);
1574 return PTR_ERR(task);
1575 status = nfs4_wait_for_completion_rpc_task(task);
1577 data->cancelled = 1;
1580 status = data->rpc_status;
1586 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1588 struct inode *dir = data->dir->d_inode;
1589 struct nfs_openres *o_res = &data->o_res;
1592 status = nfs4_run_open_task(data, 1);
1593 if (status != 0 || !data->rpc_done)
1596 nfs_refresh_inode(dir, o_res->dir_attr);
1598 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1599 status = _nfs4_proc_open_confirm(data);
1608 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1610 static int _nfs4_proc_open(struct nfs4_opendata *data)
1612 struct inode *dir = data->dir->d_inode;
1613 struct nfs_server *server = NFS_SERVER(dir);
1614 struct nfs_openargs *o_arg = &data->o_arg;
1615 struct nfs_openres *o_res = &data->o_res;
1618 status = nfs4_run_open_task(data, 0);
1619 if (!data->rpc_done)
1622 if (status == -NFS4ERR_BADNAME &&
1623 !(o_arg->open_flags & O_CREAT))
1628 if (o_arg->open_flags & O_CREAT) {
1629 update_changeattr(dir, &o_res->cinfo);
1630 nfs_post_op_update_inode(dir, o_res->dir_attr);
1632 nfs_refresh_inode(dir, o_res->dir_attr);
1633 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1634 server->caps &= ~NFS_CAP_POSIX_LOCK;
1635 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1636 status = _nfs4_proc_open_confirm(data);
1640 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1641 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1645 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1650 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1651 ret = nfs4_wait_clnt_recover(clp);
1654 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1655 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1657 nfs4_schedule_state_manager(clp);
1663 static int nfs4_recover_expired_lease(struct nfs_server *server)
1665 return nfs4_client_recover_expired_lease(server->nfs_client);
1670 * reclaim state on the server after a network partition.
1671 * Assumes caller holds the appropriate lock
1673 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1675 struct nfs4_opendata *opendata;
1678 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1679 if (IS_ERR(opendata))
1680 return PTR_ERR(opendata);
1681 ret = nfs4_open_recover(opendata, state);
1683 d_drop(ctx->dentry);
1684 nfs4_opendata_put(opendata);
1688 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1690 struct nfs_server *server = NFS_SERVER(state->inode);
1691 struct nfs4_exception exception = { };
1695 err = _nfs4_open_expired(ctx, state);
1699 case -NFS4ERR_GRACE:
1700 case -NFS4ERR_DELAY:
1701 nfs4_handle_exception(server, err, &exception);
1704 } while (exception.retry);
1709 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1711 struct nfs_open_context *ctx;
1714 ctx = nfs4_state_find_open_context(state);
1716 return PTR_ERR(ctx);
1717 ret = nfs4_do_open_expired(ctx, state);
1718 put_nfs_open_context(ctx);
1722 #if defined(CONFIG_NFS_V4_1)
1723 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1726 struct nfs_server *server = NFS_SERVER(state->inode);
1728 status = nfs41_test_stateid(server, state);
1729 if (status == NFS_OK)
1731 nfs41_free_stateid(server, state);
1732 return nfs4_open_expired(sp, state);
1737 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1738 * fields corresponding to attributes that were used to store the verifier.
1739 * Make sure we clobber those fields in the later setattr call
1741 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1743 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1744 !(sattr->ia_valid & ATTR_ATIME_SET))
1745 sattr->ia_valid |= ATTR_ATIME;
1747 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1748 !(sattr->ia_valid & ATTR_MTIME_SET))
1749 sattr->ia_valid |= ATTR_MTIME;
1753 * Returns a referenced nfs4_state
1755 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)
1757 struct nfs4_state_owner *sp;
1758 struct nfs4_state *state = NULL;
1759 struct nfs_server *server = NFS_SERVER(dir);
1760 struct nfs4_opendata *opendata;
1763 /* Protect against reboot recovery conflicts */
1765 if (!(sp = nfs4_get_state_owner(server, cred))) {
1766 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1769 status = nfs4_recover_expired_lease(server);
1771 goto err_put_state_owner;
1772 if (dentry->d_inode != NULL)
1773 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1775 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1776 if (opendata == NULL)
1777 goto err_put_state_owner;
1779 if (dentry->d_inode != NULL)
1780 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1782 status = _nfs4_proc_open(opendata);
1784 goto err_opendata_put;
1786 state = nfs4_opendata_to_nfs4_state(opendata);
1787 status = PTR_ERR(state);
1789 goto err_opendata_put;
1790 if (server->caps & NFS_CAP_POSIX_LOCK)
1791 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1793 if (opendata->o_arg.open_flags & O_EXCL) {
1794 nfs4_exclusive_attrset(opendata, sattr);
1796 nfs_fattr_init(opendata->o_res.f_attr);
1797 status = nfs4_do_setattr(state->inode, cred,
1798 opendata->o_res.f_attr, sattr,
1801 nfs_setattr_update_inode(state->inode, sattr);
1802 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1804 nfs4_opendata_put(opendata);
1805 nfs4_put_state_owner(sp);
1809 nfs4_opendata_put(opendata);
1810 err_put_state_owner:
1811 nfs4_put_state_owner(sp);
1818 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)
1820 struct nfs4_exception exception = { };
1821 struct nfs4_state *res;
1825 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1828 /* NOTE: BAD_SEQID means the server and client disagree about the
1829 * book-keeping w.r.t. state-changing operations
1830 * (OPEN/CLOSE/LOCK/LOCKU...)
1831 * It is actually a sign of a bug on the client or on the server.
1833 * If we receive a BAD_SEQID error in the particular case of
1834 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1835 * have unhashed the old state_owner for us, and that we can
1836 * therefore safely retry using a new one. We should still warn
1837 * the user though...
1839 if (status == -NFS4ERR_BAD_SEQID) {
1840 pr_warn_ratelimited("NFS: v4 server %s "
1841 " returned a bad sequence-id error!\n",
1842 NFS_SERVER(dir)->nfs_client->cl_hostname);
1843 exception.retry = 1;
1847 * BAD_STATEID on OPEN means that the server cancelled our
1848 * state before it received the OPEN_CONFIRM.
1849 * Recover by retrying the request as per the discussion
1850 * on Page 181 of RFC3530.
1852 if (status == -NFS4ERR_BAD_STATEID) {
1853 exception.retry = 1;
1856 if (status == -EAGAIN) {
1857 /* We must have found a delegation */
1858 exception.retry = 1;
1861 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1862 status, &exception));
1863 } while (exception.retry);
1867 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1868 struct nfs_fattr *fattr, struct iattr *sattr,
1869 struct nfs4_state *state)
1871 struct nfs_server *server = NFS_SERVER(inode);
1872 struct nfs_setattrargs arg = {
1873 .fh = NFS_FH(inode),
1876 .bitmask = server->attr_bitmask,
1878 struct nfs_setattrres res = {
1882 struct rpc_message msg = {
1883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1888 unsigned long timestamp = jiffies;
1891 nfs_fattr_init(fattr);
1893 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1894 /* Use that stateid */
1895 } else if (state != NULL) {
1896 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1898 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1900 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1901 if (status == 0 && state != NULL)
1902 renew_lease(server, timestamp);
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 nfs4_exception exception = {
1917 err = nfs4_handle_exception(server,
1918 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1920 } while (exception.retry);
1924 struct nfs4_closedata {
1925 struct inode *inode;
1926 struct nfs4_state *state;
1927 struct nfs_closeargs arg;
1928 struct nfs_closeres res;
1929 struct nfs_fattr fattr;
1930 unsigned long timestamp;
1935 static void nfs4_free_closedata(void *data)
1937 struct nfs4_closedata *calldata = data;
1938 struct nfs4_state_owner *sp = calldata->state->owner;
1939 struct super_block *sb = calldata->state->inode->i_sb;
1942 pnfs_roc_release(calldata->state->inode);
1943 nfs4_put_open_state(calldata->state);
1944 nfs_free_seqid(calldata->arg.seqid);
1945 nfs4_put_state_owner(sp);
1946 nfs_sb_deactive(sb);
1950 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1953 spin_lock(&state->owner->so_lock);
1954 if (!(fmode & FMODE_READ))
1955 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1956 if (!(fmode & FMODE_WRITE))
1957 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1958 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1959 spin_unlock(&state->owner->so_lock);
1962 static void nfs4_close_done(struct rpc_task *task, void *data)
1964 struct nfs4_closedata *calldata = data;
1965 struct nfs4_state *state = calldata->state;
1966 struct nfs_server *server = NFS_SERVER(calldata->inode);
1968 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1970 /* hmm. we are done with the inode, and in the process of freeing
1971 * the state_owner. we keep this around to process errors
1973 switch (task->tk_status) {
1976 pnfs_roc_set_barrier(state->inode,
1977 calldata->roc_barrier);
1978 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1979 renew_lease(server, calldata->timestamp);
1980 nfs4_close_clear_stateid_flags(state,
1981 calldata->arg.fmode);
1983 case -NFS4ERR_STALE_STATEID:
1984 case -NFS4ERR_OLD_STATEID:
1985 case -NFS4ERR_BAD_STATEID:
1986 case -NFS4ERR_EXPIRED:
1987 if (calldata->arg.fmode == 0)
1990 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1991 rpc_restart_call_prepare(task);
1993 nfs_release_seqid(calldata->arg.seqid);
1994 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1997 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1999 struct nfs4_closedata *calldata = data;
2000 struct nfs4_state *state = calldata->state;
2003 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2006 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2007 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2008 spin_lock(&state->owner->so_lock);
2009 /* Calculate the change in open mode */
2010 if (state->n_rdwr == 0) {
2011 if (state->n_rdonly == 0) {
2012 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2013 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2014 calldata->arg.fmode &= ~FMODE_READ;
2016 if (state->n_wronly == 0) {
2017 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2018 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2019 calldata->arg.fmode &= ~FMODE_WRITE;
2022 spin_unlock(&state->owner->so_lock);
2025 /* Note: exit _without_ calling nfs4_close_done */
2026 task->tk_action = NULL;
2030 if (calldata->arg.fmode == 0) {
2031 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2032 if (calldata->roc &&
2033 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2034 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2040 nfs_fattr_init(calldata->res.fattr);
2041 calldata->timestamp = jiffies;
2042 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2043 &calldata->arg.seq_args, &calldata->res.seq_res,
2046 rpc_call_start(task);
2049 static const struct rpc_call_ops nfs4_close_ops = {
2050 .rpc_call_prepare = nfs4_close_prepare,
2051 .rpc_call_done = nfs4_close_done,
2052 .rpc_release = nfs4_free_closedata,
2056 * It is possible for data to be read/written from a mem-mapped file
2057 * after the sys_close call (which hits the vfs layer as a flush).
2058 * This means that we can't safely call nfsv4 close on a file until
2059 * the inode is cleared. This in turn means that we are not good
2060 * NFSv4 citizens - we do not indicate to the server to update the file's
2061 * share state even when we are done with one of the three share
2062 * stateid's in the inode.
2064 * NOTE: Caller must be holding the sp->so_owner semaphore!
2066 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2068 struct nfs_server *server = NFS_SERVER(state->inode);
2069 struct nfs4_closedata *calldata;
2070 struct nfs4_state_owner *sp = state->owner;
2071 struct rpc_task *task;
2072 struct rpc_message msg = {
2073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2074 .rpc_cred = state->owner->so_cred,
2076 struct rpc_task_setup task_setup_data = {
2077 .rpc_client = server->client,
2078 .rpc_message = &msg,
2079 .callback_ops = &nfs4_close_ops,
2080 .workqueue = nfsiod_workqueue,
2081 .flags = RPC_TASK_ASYNC,
2083 int status = -ENOMEM;
2085 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2086 if (calldata == NULL)
2088 calldata->inode = state->inode;
2089 calldata->state = state;
2090 calldata->arg.fh = NFS_FH(state->inode);
2091 calldata->arg.stateid = &state->open_stateid;
2092 /* Serialization for the sequence id */
2093 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2094 if (calldata->arg.seqid == NULL)
2095 goto out_free_calldata;
2096 calldata->arg.fmode = 0;
2097 calldata->arg.bitmask = server->cache_consistency_bitmask;
2098 calldata->res.fattr = &calldata->fattr;
2099 calldata->res.seqid = calldata->arg.seqid;
2100 calldata->res.server = server;
2101 calldata->roc = roc;
2102 nfs_sb_active(calldata->inode->i_sb);
2104 msg.rpc_argp = &calldata->arg;
2105 msg.rpc_resp = &calldata->res;
2106 task_setup_data.callback_data = calldata;
2107 task = rpc_run_task(&task_setup_data);
2109 return PTR_ERR(task);
2112 status = rpc_wait_for_completion_task(task);
2119 pnfs_roc_release(state->inode);
2120 nfs4_put_open_state(state);
2121 nfs4_put_state_owner(sp);
2125 static struct inode *
2126 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2128 struct nfs4_state *state;
2130 /* Protect against concurrent sillydeletes */
2131 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2133 return ERR_CAST(state);
2135 return igrab(state->inode);
2138 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2140 if (ctx->state == NULL)
2143 nfs4_close_sync(ctx->state, ctx->mode);
2145 nfs4_close_state(ctx->state, ctx->mode);
2148 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2150 struct nfs4_server_caps_arg args = {
2153 struct nfs4_server_caps_res res = {};
2154 struct rpc_message msg = {
2155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2161 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2163 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2164 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2165 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2166 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2167 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2168 NFS_CAP_CTIME|NFS_CAP_MTIME);
2169 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2170 server->caps |= NFS_CAP_ACLS;
2171 if (res.has_links != 0)
2172 server->caps |= NFS_CAP_HARDLINKS;
2173 if (res.has_symlinks != 0)
2174 server->caps |= NFS_CAP_SYMLINKS;
2175 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2176 server->caps |= NFS_CAP_FILEID;
2177 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2178 server->caps |= NFS_CAP_MODE;
2179 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2180 server->caps |= NFS_CAP_NLINK;
2181 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2182 server->caps |= NFS_CAP_OWNER;
2183 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2184 server->caps |= NFS_CAP_OWNER_GROUP;
2185 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2186 server->caps |= NFS_CAP_ATIME;
2187 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2188 server->caps |= NFS_CAP_CTIME;
2189 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2190 server->caps |= NFS_CAP_MTIME;
2192 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2193 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2194 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2195 server->acl_bitmask = res.acl_bitmask;
2201 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2203 struct nfs4_exception exception = { };
2206 err = nfs4_handle_exception(server,
2207 _nfs4_server_capabilities(server, fhandle),
2209 } while (exception.retry);
2213 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2214 struct nfs_fsinfo *info)
2216 struct nfs4_lookup_root_arg args = {
2217 .bitmask = nfs4_fattr_bitmap,
2219 struct nfs4_lookup_res res = {
2221 .fattr = info->fattr,
2224 struct rpc_message msg = {
2225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2230 nfs_fattr_init(info->fattr);
2231 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2234 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2235 struct nfs_fsinfo *info)
2237 struct nfs4_exception exception = { };
2240 err = _nfs4_lookup_root(server, fhandle, info);
2243 case -NFS4ERR_WRONGSEC:
2246 err = nfs4_handle_exception(server, err, &exception);
2248 } while (exception.retry);
2253 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2254 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2256 struct rpc_auth *auth;
2259 auth = rpcauth_create(flavor, server->client);
2264 ret = nfs4_lookup_root(server, fhandle, info);
2269 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2270 struct nfs_fsinfo *info)
2272 int i, len, status = 0;
2273 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2275 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2276 flav_array[len] = RPC_AUTH_NULL;
2279 for (i = 0; i < len; i++) {
2280 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2281 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2286 * -EACCESS could mean that the user doesn't have correct permissions
2287 * to access the mount. It could also mean that we tried to mount
2288 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2289 * existing mount programs don't handle -EACCES very well so it should
2290 * be mapped to -EPERM instead.
2292 if (status == -EACCES)
2298 * get the file handle for the "/" directory on the server
2300 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2301 struct nfs_fsinfo *info)
2303 int minor_version = server->nfs_client->cl_minorversion;
2304 int status = nfs4_lookup_root(server, fhandle, info);
2305 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2307 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2308 * by nfs4_map_errors() as this function exits.
2310 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2312 status = nfs4_server_capabilities(server, fhandle);
2314 status = nfs4_do_fsinfo(server, fhandle, info);
2315 return nfs4_map_errors(status);
2318 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2320 * Get locations and (maybe) other attributes of a referral.
2321 * Note that we'll actually follow the referral later when
2322 * we detect fsid mismatch in inode revalidation
2324 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2325 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2327 int status = -ENOMEM;
2328 struct page *page = NULL;
2329 struct nfs4_fs_locations *locations = NULL;
2331 page = alloc_page(GFP_KERNEL);
2334 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2335 if (locations == NULL)
2338 status = nfs4_proc_fs_locations(dir, name, locations, page);
2341 /* Make sure server returned a different fsid for the referral */
2342 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2343 dprintk("%s: server did not return a different fsid for"
2344 " a referral at %s\n", __func__, name->name);
2348 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2349 nfs_fixup_referral_attributes(&locations->fattr);
2351 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2352 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2353 memset(fhandle, 0, sizeof(struct nfs_fh));
2361 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2363 struct nfs4_getattr_arg args = {
2365 .bitmask = server->attr_bitmask,
2367 struct nfs4_getattr_res res = {
2371 struct rpc_message msg = {
2372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2377 nfs_fattr_init(fattr);
2378 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2381 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2383 struct nfs4_exception exception = { };
2386 err = nfs4_handle_exception(server,
2387 _nfs4_proc_getattr(server, fhandle, fattr),
2389 } while (exception.retry);
2394 * The file is not closed if it is opened due to the a request to change
2395 * the size of the file. The open call will not be needed once the
2396 * VFS layer lookup-intents are implemented.
2398 * Close is called when the inode is destroyed.
2399 * If we haven't opened the file for O_WRONLY, we
2400 * need to in the size_change case to obtain a stateid.
2403 * Because OPEN is always done by name in nfsv4, it is
2404 * possible that we opened a different file by the same
2405 * name. We can recognize this race condition, but we
2406 * can't do anything about it besides returning an error.
2408 * This will be fixed with VFS changes (lookup-intent).
2411 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2412 struct iattr *sattr)
2414 struct inode *inode = dentry->d_inode;
2415 struct rpc_cred *cred = NULL;
2416 struct nfs4_state *state = NULL;
2419 if (pnfs_ld_layoutret_on_setattr(inode))
2420 pnfs_return_layout(inode);
2422 nfs_fattr_init(fattr);
2424 /* Search for an existing open(O_WRITE) file */
2425 if (sattr->ia_valid & ATTR_FILE) {
2426 struct nfs_open_context *ctx;
2428 ctx = nfs_file_open_context(sattr->ia_file);
2435 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2437 nfs_setattr_update_inode(inode, sattr);
2441 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2442 const struct qstr *name, struct nfs_fh *fhandle,
2443 struct nfs_fattr *fattr)
2445 struct nfs_server *server = NFS_SERVER(dir);
2447 struct nfs4_lookup_arg args = {
2448 .bitmask = server->attr_bitmask,
2449 .dir_fh = NFS_FH(dir),
2452 struct nfs4_lookup_res res = {
2457 struct rpc_message msg = {
2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2463 nfs_fattr_init(fattr);
2465 dprintk("NFS call lookup %s\n", name->name);
2466 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2467 dprintk("NFS reply lookup: %d\n", status);
2471 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2473 memset(fh, 0, sizeof(struct nfs_fh));
2474 fattr->fsid.major = 1;
2475 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2476 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2477 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2481 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2482 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2484 struct nfs4_exception exception = { };
2489 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2491 case -NFS4ERR_BADNAME:
2493 case -NFS4ERR_MOVED:
2494 return nfs4_get_referral(dir, name, fattr, fhandle);
2495 case -NFS4ERR_WRONGSEC:
2496 nfs_fixup_secinfo_attributes(fattr, fhandle);
2498 err = nfs4_handle_exception(NFS_SERVER(dir),
2499 status, &exception);
2500 } while (exception.retry);
2504 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2506 struct nfs_server *server = NFS_SERVER(inode);
2507 struct nfs4_accessargs args = {
2508 .fh = NFS_FH(inode),
2509 .bitmask = server->attr_bitmask,
2511 struct nfs4_accessres res = {
2514 struct rpc_message msg = {
2515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2518 .rpc_cred = entry->cred,
2520 int mode = entry->mask;
2524 * Determine which access bits we want to ask for...
2526 if (mode & MAY_READ)
2527 args.access |= NFS4_ACCESS_READ;
2528 if (S_ISDIR(inode->i_mode)) {
2529 if (mode & MAY_WRITE)
2530 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2531 if (mode & MAY_EXEC)
2532 args.access |= NFS4_ACCESS_LOOKUP;
2534 if (mode & MAY_WRITE)
2535 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2536 if (mode & MAY_EXEC)
2537 args.access |= NFS4_ACCESS_EXECUTE;
2540 res.fattr = nfs_alloc_fattr();
2541 if (res.fattr == NULL)
2544 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2547 if (res.access & NFS4_ACCESS_READ)
2548 entry->mask |= MAY_READ;
2549 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2550 entry->mask |= MAY_WRITE;
2551 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2552 entry->mask |= MAY_EXEC;
2553 nfs_refresh_inode(inode, res.fattr);
2555 nfs_free_fattr(res.fattr);
2559 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2561 struct nfs4_exception exception = { };
2564 err = nfs4_handle_exception(NFS_SERVER(inode),
2565 _nfs4_proc_access(inode, entry),
2567 } while (exception.retry);
2572 * TODO: For the time being, we don't try to get any attributes
2573 * along with any of the zero-copy operations READ, READDIR,
2576 * In the case of the first three, we want to put the GETATTR
2577 * after the read-type operation -- this is because it is hard
2578 * to predict the length of a GETATTR response in v4, and thus
2579 * align the READ data correctly. This means that the GETATTR
2580 * may end up partially falling into the page cache, and we should
2581 * shift it into the 'tail' of the xdr_buf before processing.
2582 * To do this efficiently, we need to know the total length
2583 * of data received, which doesn't seem to be available outside
2586 * In the case of WRITE, we also want to put the GETATTR after
2587 * the operation -- in this case because we want to make sure
2588 * we get the post-operation mtime and size. This means that
2589 * we can't use xdr_encode_pages() as written: we need a variant
2590 * of it which would leave room in the 'tail' iovec.
2592 * Both of these changes to the XDR layer would in fact be quite
2593 * minor, but I decided to leave them for a subsequent patch.
2595 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2596 unsigned int pgbase, unsigned int pglen)
2598 struct nfs4_readlink args = {
2599 .fh = NFS_FH(inode),
2604 struct nfs4_readlink_res res;
2605 struct rpc_message msg = {
2606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2611 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2614 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2615 unsigned int pgbase, unsigned int pglen)
2617 struct nfs4_exception exception = { };
2620 err = nfs4_handle_exception(NFS_SERVER(inode),
2621 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2623 } while (exception.retry);
2629 * We will need to arrange for the VFS layer to provide an atomic open.
2630 * Until then, this create/open method is prone to inefficiency and race
2631 * conditions due to the lookup, create, and open VFS calls from sys_open()
2632 * placed on the wire.
2634 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2635 * The file will be opened again in the subsequent VFS open call
2636 * (nfs4_proc_file_open).
2638 * The open for read will just hang around to be used by any process that
2639 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2643 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2644 int flags, struct nfs_open_context *ctx)
2646 struct dentry *de = dentry;
2647 struct nfs4_state *state;
2648 struct rpc_cred *cred = NULL;
2657 sattr->ia_mode &= ~current_umask();
2658 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2660 if (IS_ERR(state)) {
2661 status = PTR_ERR(state);
2664 d_add(dentry, igrab(state->inode));
2665 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2669 nfs4_close_sync(state, fmode);
2674 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2676 struct nfs_server *server = NFS_SERVER(dir);
2677 struct nfs_removeargs args = {
2679 .name.len = name->len,
2680 .name.name = name->name,
2681 .bitmask = server->attr_bitmask,
2683 struct nfs_removeres res = {
2686 struct rpc_message msg = {
2687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2691 int status = -ENOMEM;
2693 res.dir_attr = nfs_alloc_fattr();
2694 if (res.dir_attr == NULL)
2697 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2699 update_changeattr(dir, &res.cinfo);
2700 nfs_post_op_update_inode(dir, res.dir_attr);
2702 nfs_free_fattr(res.dir_attr);
2707 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2709 struct nfs4_exception exception = { };
2712 err = nfs4_handle_exception(NFS_SERVER(dir),
2713 _nfs4_proc_remove(dir, name),
2715 } while (exception.retry);
2719 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2721 struct nfs_server *server = NFS_SERVER(dir);
2722 struct nfs_removeargs *args = msg->rpc_argp;
2723 struct nfs_removeres *res = msg->rpc_resp;
2725 args->bitmask = server->cache_consistency_bitmask;
2726 res->server = server;
2727 res->seq_res.sr_slot = NULL;
2728 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2731 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2733 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2735 if (!nfs4_sequence_done(task, &res->seq_res))
2737 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2739 update_changeattr(dir, &res->cinfo);
2740 nfs_post_op_update_inode(dir, res->dir_attr);
2744 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2746 struct nfs_server *server = NFS_SERVER(dir);
2747 struct nfs_renameargs *arg = msg->rpc_argp;
2748 struct nfs_renameres *res = msg->rpc_resp;
2750 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2751 arg->bitmask = server->attr_bitmask;
2752 res->server = server;
2755 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2756 struct inode *new_dir)
2758 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2760 if (!nfs4_sequence_done(task, &res->seq_res))
2762 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2765 update_changeattr(old_dir, &res->old_cinfo);
2766 nfs_post_op_update_inode(old_dir, res->old_fattr);
2767 update_changeattr(new_dir, &res->new_cinfo);
2768 nfs_post_op_update_inode(new_dir, res->new_fattr);
2772 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2773 struct inode *new_dir, struct qstr *new_name)
2775 struct nfs_server *server = NFS_SERVER(old_dir);
2776 struct nfs_renameargs arg = {
2777 .old_dir = NFS_FH(old_dir),
2778 .new_dir = NFS_FH(new_dir),
2779 .old_name = old_name,
2780 .new_name = new_name,
2781 .bitmask = server->attr_bitmask,
2783 struct nfs_renameres res = {
2786 struct rpc_message msg = {
2787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2791 int status = -ENOMEM;
2793 res.old_fattr = nfs_alloc_fattr();
2794 res.new_fattr = nfs_alloc_fattr();
2795 if (res.old_fattr == NULL || res.new_fattr == NULL)
2798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2800 update_changeattr(old_dir, &res.old_cinfo);
2801 nfs_post_op_update_inode(old_dir, res.old_fattr);
2802 update_changeattr(new_dir, &res.new_cinfo);
2803 nfs_post_op_update_inode(new_dir, res.new_fattr);
2806 nfs_free_fattr(res.new_fattr);
2807 nfs_free_fattr(res.old_fattr);
2811 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2812 struct inode *new_dir, struct qstr *new_name)
2814 struct nfs4_exception exception = { };
2817 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2818 _nfs4_proc_rename(old_dir, old_name,
2821 } while (exception.retry);
2825 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2827 struct nfs_server *server = NFS_SERVER(inode);
2828 struct nfs4_link_arg arg = {
2829 .fh = NFS_FH(inode),
2830 .dir_fh = NFS_FH(dir),
2832 .bitmask = server->attr_bitmask,
2834 struct nfs4_link_res res = {
2837 struct rpc_message msg = {
2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2842 int status = -ENOMEM;
2844 res.fattr = nfs_alloc_fattr();
2845 res.dir_attr = nfs_alloc_fattr();
2846 if (res.fattr == NULL || res.dir_attr == NULL)
2849 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2851 update_changeattr(dir, &res.cinfo);
2852 nfs_post_op_update_inode(dir, res.dir_attr);
2853 nfs_post_op_update_inode(inode, res.fattr);
2856 nfs_free_fattr(res.dir_attr);
2857 nfs_free_fattr(res.fattr);
2861 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2863 struct nfs4_exception exception = { };
2866 err = nfs4_handle_exception(NFS_SERVER(inode),
2867 _nfs4_proc_link(inode, dir, name),
2869 } while (exception.retry);
2873 struct nfs4_createdata {
2874 struct rpc_message msg;
2875 struct nfs4_create_arg arg;
2876 struct nfs4_create_res res;
2878 struct nfs_fattr fattr;
2879 struct nfs_fattr dir_fattr;
2882 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2883 struct qstr *name, struct iattr *sattr, u32 ftype)
2885 struct nfs4_createdata *data;
2887 data = kzalloc(sizeof(*data), GFP_KERNEL);
2889 struct nfs_server *server = NFS_SERVER(dir);
2891 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2892 data->msg.rpc_argp = &data->arg;
2893 data->msg.rpc_resp = &data->res;
2894 data->arg.dir_fh = NFS_FH(dir);
2895 data->arg.server = server;
2896 data->arg.name = name;
2897 data->arg.attrs = sattr;
2898 data->arg.ftype = ftype;
2899 data->arg.bitmask = server->attr_bitmask;
2900 data->res.server = server;
2901 data->res.fh = &data->fh;
2902 data->res.fattr = &data->fattr;
2903 data->res.dir_fattr = &data->dir_fattr;
2904 nfs_fattr_init(data->res.fattr);
2905 nfs_fattr_init(data->res.dir_fattr);
2910 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2912 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2913 &data->arg.seq_args, &data->res.seq_res, 1);
2915 update_changeattr(dir, &data->res.dir_cinfo);
2916 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2917 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2922 static void nfs4_free_createdata(struct nfs4_createdata *data)
2927 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2928 struct page *page, unsigned int len, struct iattr *sattr)
2930 struct nfs4_createdata *data;
2931 int status = -ENAMETOOLONG;
2933 if (len > NFS4_MAXPATHLEN)
2937 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2941 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2942 data->arg.u.symlink.pages = &page;
2943 data->arg.u.symlink.len = len;
2945 status = nfs4_do_create(dir, dentry, data);
2947 nfs4_free_createdata(data);
2952 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2953 struct page *page, unsigned int len, struct iattr *sattr)
2955 struct nfs4_exception exception = { };
2958 err = nfs4_handle_exception(NFS_SERVER(dir),
2959 _nfs4_proc_symlink(dir, dentry, page,
2962 } while (exception.retry);
2966 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2967 struct iattr *sattr)
2969 struct nfs4_createdata *data;
2970 int status = -ENOMEM;
2972 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2976 status = nfs4_do_create(dir, dentry, data);
2978 nfs4_free_createdata(data);
2983 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2984 struct iattr *sattr)
2986 struct nfs4_exception exception = { };
2989 sattr->ia_mode &= ~current_umask();
2991 err = nfs4_handle_exception(NFS_SERVER(dir),
2992 _nfs4_proc_mkdir(dir, dentry, sattr),
2994 } while (exception.retry);
2998 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2999 u64 cookie, struct page **pages, unsigned int count, int plus)
3001 struct inode *dir = dentry->d_inode;
3002 struct nfs4_readdir_arg args = {
3007 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3010 struct nfs4_readdir_res res;
3011 struct rpc_message msg = {
3012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3019 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3020 dentry->d_parent->d_name.name,
3021 dentry->d_name.name,
3022 (unsigned long long)cookie);
3023 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3024 res.pgbase = args.pgbase;
3025 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3027 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3028 status += args.pgbase;
3031 nfs_invalidate_atime(dir);
3033 dprintk("%s: returns %d\n", __func__, status);
3037 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3038 u64 cookie, struct page **pages, unsigned int count, int plus)
3040 struct nfs4_exception exception = { };
3043 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3044 _nfs4_proc_readdir(dentry, cred, cookie,
3045 pages, count, plus),
3047 } while (exception.retry);
3051 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3052 struct iattr *sattr, dev_t rdev)
3054 struct nfs4_createdata *data;
3055 int mode = sattr->ia_mode;
3056 int status = -ENOMEM;
3058 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3059 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3061 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3066 data->arg.ftype = NF4FIFO;
3067 else if (S_ISBLK(mode)) {
3068 data->arg.ftype = NF4BLK;
3069 data->arg.u.device.specdata1 = MAJOR(rdev);
3070 data->arg.u.device.specdata2 = MINOR(rdev);
3072 else if (S_ISCHR(mode)) {
3073 data->arg.ftype = NF4CHR;
3074 data->arg.u.device.specdata1 = MAJOR(rdev);
3075 data->arg.u.device.specdata2 = MINOR(rdev);
3078 status = nfs4_do_create(dir, dentry, data);
3080 nfs4_free_createdata(data);
3085 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3086 struct iattr *sattr, dev_t rdev)
3088 struct nfs4_exception exception = { };
3091 sattr->ia_mode &= ~current_umask();
3093 err = nfs4_handle_exception(NFS_SERVER(dir),
3094 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3096 } while (exception.retry);
3100 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3101 struct nfs_fsstat *fsstat)
3103 struct nfs4_statfs_arg args = {
3105 .bitmask = server->attr_bitmask,
3107 struct nfs4_statfs_res res = {
3110 struct rpc_message msg = {
3111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3116 nfs_fattr_init(fsstat->fattr);
3117 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3120 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3122 struct nfs4_exception exception = { };
3125 err = nfs4_handle_exception(server,
3126 _nfs4_proc_statfs(server, fhandle, fsstat),
3128 } while (exception.retry);
3132 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3133 struct nfs_fsinfo *fsinfo)
3135 struct nfs4_fsinfo_arg args = {
3137 .bitmask = server->attr_bitmask,
3139 struct nfs4_fsinfo_res res = {
3142 struct rpc_message msg = {
3143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3148 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3151 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3153 struct nfs4_exception exception = { };
3157 err = nfs4_handle_exception(server,
3158 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3160 } while (exception.retry);
3164 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3166 nfs_fattr_init(fsinfo->fattr);
3167 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3170 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3171 struct nfs_pathconf *pathconf)
3173 struct nfs4_pathconf_arg args = {
3175 .bitmask = server->attr_bitmask,
3177 struct nfs4_pathconf_res res = {
3178 .pathconf = pathconf,
3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3186 /* None of the pathconf attributes are mandatory to implement */
3187 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3188 memset(pathconf, 0, sizeof(*pathconf));
3192 nfs_fattr_init(pathconf->fattr);
3193 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3196 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3197 struct nfs_pathconf *pathconf)
3199 struct nfs4_exception exception = { };
3203 err = nfs4_handle_exception(server,
3204 _nfs4_proc_pathconf(server, fhandle, pathconf),
3206 } while (exception.retry);
3210 void __nfs4_read_done_cb(struct nfs_read_data *data)
3212 nfs_invalidate_atime(data->inode);
3215 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3217 struct nfs_server *server = NFS_SERVER(data->inode);
3219 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3220 rpc_restart_call_prepare(task);
3224 __nfs4_read_done_cb(data);
3225 if (task->tk_status > 0)
3226 renew_lease(server, data->timestamp);
3230 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3233 dprintk("--> %s\n", __func__);
3235 if (!nfs4_sequence_done(task, &data->res.seq_res))
3238 return data->read_done_cb ? data->read_done_cb(task, data) :
3239 nfs4_read_done_cb(task, data);
3242 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3244 data->timestamp = jiffies;
3245 data->read_done_cb = nfs4_read_done_cb;
3246 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3249 /* Reset the the nfs_read_data to send the read to the MDS. */
3250 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3252 dprintk("%s Reset task for i/o through\n", __func__);
3253 put_lseg(data->lseg);
3255 /* offsets will differ in the dense stripe case */
3256 data->args.offset = data->mds_offset;
3257 data->ds_clp = NULL;
3258 data->args.fh = NFS_FH(data->inode);
3259 data->read_done_cb = nfs4_read_done_cb;
3260 task->tk_ops = data->mds_ops;
3261 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3263 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3265 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3267 struct inode *inode = data->inode;
3269 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3270 rpc_restart_call_prepare(task);
3273 if (task->tk_status >= 0) {
3274 renew_lease(NFS_SERVER(inode), data->timestamp);
3275 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3280 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3282 if (!nfs4_sequence_done(task, &data->res.seq_res))
3284 return data->write_done_cb ? data->write_done_cb(task, data) :
3285 nfs4_write_done_cb(task, data);
3288 /* Reset the the nfs_write_data to send the write to the MDS. */
3289 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3291 dprintk("%s Reset task for i/o through\n", __func__);
3292 put_lseg(data->lseg);
3294 data->ds_clp = NULL;
3295 data->write_done_cb = nfs4_write_done_cb;
3296 data->args.fh = NFS_FH(data->inode);
3297 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3298 data->args.offset = data->mds_offset;
3299 data->res.fattr = &data->fattr;
3300 task->tk_ops = data->mds_ops;
3301 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3303 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3305 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3307 struct nfs_server *server = NFS_SERVER(data->inode);
3310 data->args.bitmask = NULL;
3311 data->res.fattr = NULL;
3313 data->args.bitmask = server->cache_consistency_bitmask;
3314 if (!data->write_done_cb)
3315 data->write_done_cb = nfs4_write_done_cb;
3316 data->res.server = server;
3317 data->timestamp = jiffies;
3319 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3322 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3324 struct inode *inode = data->inode;
3326 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3327 rpc_restart_call_prepare(task);
3330 nfs_refresh_inode(inode, data->res.fattr);
3334 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3336 if (!nfs4_sequence_done(task, &data->res.seq_res))
3338 return data->write_done_cb(task, data);
3341 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3343 struct nfs_server *server = NFS_SERVER(data->inode);
3346 data->args.bitmask = NULL;
3347 data->res.fattr = NULL;
3349 data->args.bitmask = server->cache_consistency_bitmask;
3350 if (!data->write_done_cb)
3351 data->write_done_cb = nfs4_commit_done_cb;
3352 data->res.server = server;
3353 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3356 struct nfs4_renewdata {
3357 struct nfs_client *client;
3358 unsigned long timestamp;
3362 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3363 * standalone procedure for queueing an asynchronous RENEW.
3365 static void nfs4_renew_release(void *calldata)
3367 struct nfs4_renewdata *data = calldata;
3368 struct nfs_client *clp = data->client;
3370 if (atomic_read(&clp->cl_count) > 1)
3371 nfs4_schedule_state_renewal(clp);
3372 nfs_put_client(clp);
3376 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3378 struct nfs4_renewdata *data = calldata;
3379 struct nfs_client *clp = data->client;
3380 unsigned long timestamp = data->timestamp;
3382 if (task->tk_status < 0) {
3383 /* Unless we're shutting down, schedule state recovery! */
3384 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3386 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3387 nfs4_schedule_lease_recovery(clp);
3390 nfs4_schedule_path_down_recovery(clp);
3392 do_renew_lease(clp, timestamp);
3395 static const struct rpc_call_ops nfs4_renew_ops = {
3396 .rpc_call_done = nfs4_renew_done,
3397 .rpc_release = nfs4_renew_release,
3400 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3402 struct rpc_message msg = {
3403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3407 struct nfs4_renewdata *data;
3409 if (renew_flags == 0)
3411 if (!atomic_inc_not_zero(&clp->cl_count))
3413 data = kmalloc(sizeof(*data), GFP_NOFS);
3417 data->timestamp = jiffies;
3418 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3419 &nfs4_renew_ops, data);
3422 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3424 struct rpc_message msg = {
3425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3429 unsigned long now = jiffies;
3432 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3435 do_renew_lease(clp, now);
3439 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3441 return (server->caps & NFS_CAP_ACLS)
3442 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3443 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3446 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3447 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3450 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3452 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3453 struct page **pages, unsigned int *pgbase)
3455 struct page *newpage, **spages;
3461 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3462 newpage = alloc_page(GFP_KERNEL);
3464 if (newpage == NULL)
3466 memcpy(page_address(newpage), buf, len);
3471 } while (buflen != 0);
3477 __free_page(spages[rc-1]);
3481 struct nfs4_cached_acl {
3487 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3489 struct nfs_inode *nfsi = NFS_I(inode);
3491 spin_lock(&inode->i_lock);
3492 kfree(nfsi->nfs4_acl);
3493 nfsi->nfs4_acl = acl;
3494 spin_unlock(&inode->i_lock);
3497 static void nfs4_zap_acl_attr(struct inode *inode)
3499 nfs4_set_cached_acl(inode, NULL);
3502 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3504 struct nfs_inode *nfsi = NFS_I(inode);
3505 struct nfs4_cached_acl *acl;
3508 spin_lock(&inode->i_lock);
3509 acl = nfsi->nfs4_acl;
3512 if (buf == NULL) /* user is just asking for length */
3514 if (acl->cached == 0)
3516 ret = -ERANGE; /* see getxattr(2) man page */
3517 if (acl->len > buflen)
3519 memcpy(buf, acl->data, acl->len);
3523 spin_unlock(&inode->i_lock);
3527 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3529 struct nfs4_cached_acl *acl;
3531 if (buf && acl_len <= PAGE_SIZE) {
3532 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3536 memcpy(acl->data, buf, acl_len);
3538 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3545 nfs4_set_cached_acl(inode, acl);
3549 * The getxattr API returns the required buffer length when called with a
3550 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3551 * the required buf. On a NULL buf, we send a page of data to the server
3552 * guessing that the ACL request can be serviced by a page. If so, we cache
3553 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3554 * the cache. If not so, we throw away the page, and cache the required
3555 * length. The next getxattr call will then produce another round trip to
3556 * the server, this time with the input buf of the required size.
3558 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3560 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3561 struct nfs_getaclargs args = {
3562 .fh = NFS_FH(inode),
3566 struct nfs_getaclres res = {
3570 struct rpc_message msg = {
3571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3575 int ret = -ENOMEM, npages, i, acl_len = 0;
3577 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3578 /* As long as we're doing a round trip to the server anyway,
3579 * let's be prepared for a page of acl data. */
3583 for (i = 0; i < npages; i++) {
3584 pages[i] = alloc_page(GFP_KERNEL);
3589 /* for decoding across pages */
3590 res.acl_scratch = alloc_page(GFP_KERNEL);
3591 if (!res.acl_scratch)
3594 args.acl_len = npages * PAGE_SIZE;
3595 args.acl_pgbase = 0;
3596 /* Let decode_getfacl know not to fail if the ACL data is larger than
3597 * the page we send as a guess */
3599 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3600 resp_buf = page_address(pages[0]);
3602 dprintk("%s buf %p buflen %ld npages %d args.acl_len %ld\n",
3603 __func__, buf, buflen, npages, args.acl_len);
3604 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3605 &msg, &args.seq_args, &res.seq_res, 0);
3609 acl_len = res.acl_len - res.acl_data_offset;
3610 if (acl_len > args.acl_len)
3611 nfs4_write_cached_acl(inode, NULL, acl_len);
3613 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3617 if (acl_len > buflen)
3619 _copy_from_pages(buf, pages, res.acl_data_offset,
3624 for (i = 0; i < npages; i++)
3626 __free_page(pages[i]);
3627 if (res.acl_scratch)
3628 __free_page(res.acl_scratch);
3632 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3634 struct nfs4_exception exception = { };
3637 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3640 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3641 } while (exception.retry);
3645 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3647 struct nfs_server *server = NFS_SERVER(inode);
3650 if (!nfs4_server_supports_acls(server))
3652 ret = nfs_revalidate_inode(server, inode);
3655 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3656 nfs_zap_acl_cache(inode);
3657 ret = nfs4_read_cached_acl(inode, buf, buflen);
3659 /* -ENOENT is returned if there is no ACL or if there is an ACL
3660 * but no cached acl data, just the acl length */
3662 return nfs4_get_acl_uncached(inode, buf, buflen);
3665 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3667 struct nfs_server *server = NFS_SERVER(inode);
3668 struct page *pages[NFS4ACL_MAXPAGES];
3669 struct nfs_setaclargs arg = {
3670 .fh = NFS_FH(inode),
3674 struct nfs_setaclres res;
3675 struct rpc_message msg = {
3676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3682 if (!nfs4_server_supports_acls(server))
3684 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3687 nfs_inode_return_delegation(inode);
3688 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3691 * Free each page after tx, so the only ref left is
3692 * held by the network stack
3695 put_page(pages[i-1]);
3698 * Acl update can result in inode attribute update.
3699 * so mark the attribute cache invalid.
3701 spin_lock(&inode->i_lock);
3702 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3703 spin_unlock(&inode->i_lock);
3704 nfs_access_zap_cache(inode);
3705 nfs_zap_acl_cache(inode);
3709 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3711 struct nfs4_exception exception = { };
3714 err = nfs4_handle_exception(NFS_SERVER(inode),
3715 __nfs4_proc_set_acl(inode, buf, buflen),
3717 } while (exception.retry);
3722 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3724 struct nfs_client *clp = server->nfs_client;
3726 if (task->tk_status >= 0)
3728 switch(task->tk_status) {
3729 case -NFS4ERR_DELEG_REVOKED:
3730 case -NFS4ERR_ADMIN_REVOKED:
3731 case -NFS4ERR_BAD_STATEID:
3734 nfs_remove_bad_delegation(state->inode);
3735 case -NFS4ERR_OPENMODE:
3738 nfs4_schedule_stateid_recovery(server, state);
3739 goto wait_on_recovery;
3740 case -NFS4ERR_EXPIRED:
3742 nfs4_schedule_stateid_recovery(server, state);
3743 case -NFS4ERR_STALE_STATEID:
3744 case -NFS4ERR_STALE_CLIENTID:
3745 nfs4_schedule_lease_recovery(clp);
3746 goto wait_on_recovery;
3747 #if defined(CONFIG_NFS_V4_1)
3748 case -NFS4ERR_BADSESSION:
3749 case -NFS4ERR_BADSLOT:
3750 case -NFS4ERR_BAD_HIGH_SLOT:
3751 case -NFS4ERR_DEADSESSION:
3752 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3753 case -NFS4ERR_SEQ_FALSE_RETRY:
3754 case -NFS4ERR_SEQ_MISORDERED:
3755 dprintk("%s ERROR %d, Reset session\n", __func__,
3757 nfs4_schedule_session_recovery(clp->cl_session);
3758 task->tk_status = 0;
3760 #endif /* CONFIG_NFS_V4_1 */
3761 case -NFS4ERR_DELAY:
3762 nfs_inc_server_stats(server, NFSIOS_DELAY);
3763 case -NFS4ERR_GRACE:
3765 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3766 task->tk_status = 0;
3768 case -NFS4ERR_RETRY_UNCACHED_REP:
3769 case -NFS4ERR_OLD_STATEID:
3770 task->tk_status = 0;
3773 task->tk_status = nfs4_map_errors(task->tk_status);
3776 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3777 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3778 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3779 task->tk_status = 0;
3783 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3784 unsigned short port, struct rpc_cred *cred,
3785 struct nfs4_setclientid_res *res)
3787 nfs4_verifier sc_verifier;
3788 struct nfs4_setclientid setclientid = {
3789 .sc_verifier = &sc_verifier,
3791 .sc_cb_ident = clp->cl_cb_ident,
3793 struct rpc_message msg = {
3794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3795 .rpc_argp = &setclientid,
3803 p = (__be32*)sc_verifier.data;
3804 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3805 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3808 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3809 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3811 rpc_peeraddr2str(clp->cl_rpcclient,
3813 rpc_peeraddr2str(clp->cl_rpcclient,
3815 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3816 clp->cl_id_uniquifier);
3817 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3818 sizeof(setclientid.sc_netid),
3819 rpc_peeraddr2str(clp->cl_rpcclient,
3820 RPC_DISPLAY_NETID));
3821 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3822 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3823 clp->cl_ipaddr, port >> 8, port & 255);
3825 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3826 if (status != -NFS4ERR_CLID_INUSE)
3829 ++clp->cl_id_uniquifier;
3833 ssleep(clp->cl_lease_time / HZ + 1);
3838 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3839 struct nfs4_setclientid_res *arg,
3840 struct rpc_cred *cred)
3842 struct nfs_fsinfo fsinfo;
3843 struct rpc_message msg = {
3844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3846 .rpc_resp = &fsinfo,
3853 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3855 spin_lock(&clp->cl_lock);
3856 clp->cl_lease_time = fsinfo.lease_time * HZ;
3857 clp->cl_last_renewal = now;
3858 spin_unlock(&clp->cl_lock);
3863 struct nfs4_delegreturndata {
3864 struct nfs4_delegreturnargs args;
3865 struct nfs4_delegreturnres res;
3867 nfs4_stateid stateid;
3868 unsigned long timestamp;
3869 struct nfs_fattr fattr;
3873 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3875 struct nfs4_delegreturndata *data = calldata;
3877 if (!nfs4_sequence_done(task, &data->res.seq_res))
3880 switch (task->tk_status) {
3881 case -NFS4ERR_STALE_STATEID:
3882 case -NFS4ERR_EXPIRED:
3884 renew_lease(data->res.server, data->timestamp);
3887 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3889 rpc_restart_call_prepare(task);
3893 data->rpc_status = task->tk_status;
3896 static void nfs4_delegreturn_release(void *calldata)
3901 #if defined(CONFIG_NFS_V4_1)
3902 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3904 struct nfs4_delegreturndata *d_data;
3906 d_data = (struct nfs4_delegreturndata *)data;
3908 if (nfs4_setup_sequence(d_data->res.server,
3909 &d_data->args.seq_args,
3910 &d_data->res.seq_res, 1, task))
3912 rpc_call_start(task);
3914 #endif /* CONFIG_NFS_V4_1 */
3916 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3917 #if defined(CONFIG_NFS_V4_1)
3918 .rpc_call_prepare = nfs4_delegreturn_prepare,
3919 #endif /* CONFIG_NFS_V4_1 */
3920 .rpc_call_done = nfs4_delegreturn_done,
3921 .rpc_release = nfs4_delegreturn_release,
3924 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3926 struct nfs4_delegreturndata *data;
3927 struct nfs_server *server = NFS_SERVER(inode);
3928 struct rpc_task *task;
3929 struct rpc_message msg = {
3930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3933 struct rpc_task_setup task_setup_data = {
3934 .rpc_client = server->client,
3935 .rpc_message = &msg,
3936 .callback_ops = &nfs4_delegreturn_ops,
3937 .flags = RPC_TASK_ASYNC,
3941 data = kzalloc(sizeof(*data), GFP_NOFS);
3944 data->args.fhandle = &data->fh;
3945 data->args.stateid = &data->stateid;
3946 data->args.bitmask = server->attr_bitmask;
3947 nfs_copy_fh(&data->fh, NFS_FH(inode));
3948 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3949 data->res.fattr = &data->fattr;
3950 data->res.server = server;
3951 nfs_fattr_init(data->res.fattr);
3952 data->timestamp = jiffies;
3953 data->rpc_status = 0;
3955 task_setup_data.callback_data = data;
3956 msg.rpc_argp = &data->args;
3957 msg.rpc_resp = &data->res;
3958 task = rpc_run_task(&task_setup_data);
3960 return PTR_ERR(task);
3963 status = nfs4_wait_for_completion_rpc_task(task);
3966 status = data->rpc_status;
3969 nfs_refresh_inode(inode, &data->fattr);
3975 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3977 struct nfs_server *server = NFS_SERVER(inode);
3978 struct nfs4_exception exception = { };
3981 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3983 case -NFS4ERR_STALE_STATEID:
3984 case -NFS4ERR_EXPIRED:
3988 err = nfs4_handle_exception(server, err, &exception);
3989 } while (exception.retry);
3993 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3994 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3997 * sleep, with exponential backoff, and retry the LOCK operation.
3999 static unsigned long
4000 nfs4_set_lock_task_retry(unsigned long timeout)
4002 schedule_timeout_killable(timeout);
4004 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4005 return NFS4_LOCK_MAXTIMEOUT;
4009 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4011 struct inode *inode = state->inode;
4012 struct nfs_server *server = NFS_SERVER(inode);
4013 struct nfs_client *clp = server->nfs_client;
4014 struct nfs_lockt_args arg = {
4015 .fh = NFS_FH(inode),
4018 struct nfs_lockt_res res = {
4021 struct rpc_message msg = {
4022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4025 .rpc_cred = state->owner->so_cred,
4027 struct nfs4_lock_state *lsp;
4030 arg.lock_owner.clientid = clp->cl_clientid;
4031 status = nfs4_set_lock_state(state, request);
4034 lsp = request->fl_u.nfs4_fl.owner;
4035 arg.lock_owner.id = lsp->ls_id.id;
4036 arg.lock_owner.s_dev = server->s_dev;
4037 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4040 request->fl_type = F_UNLCK;
4042 case -NFS4ERR_DENIED:
4045 request->fl_ops->fl_release_private(request);
4050 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4052 struct nfs4_exception exception = { };
4056 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4057 _nfs4_proc_getlk(state, cmd, request),
4059 } while (exception.retry);
4063 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4066 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4068 res = posix_lock_file_wait(file, fl);
4071 res = flock_lock_file_wait(file, fl);
4079 struct nfs4_unlockdata {
4080 struct nfs_locku_args arg;
4081 struct nfs_locku_res res;
4082 struct nfs4_lock_state *lsp;
4083 struct nfs_open_context *ctx;
4084 struct file_lock fl;
4085 const struct nfs_server *server;
4086 unsigned long timestamp;
4089 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4090 struct nfs_open_context *ctx,
4091 struct nfs4_lock_state *lsp,
4092 struct nfs_seqid *seqid)
4094 struct nfs4_unlockdata *p;
4095 struct inode *inode = lsp->ls_state->inode;
4097 p = kzalloc(sizeof(*p), GFP_NOFS);
4100 p->arg.fh = NFS_FH(inode);
4102 p->arg.seqid = seqid;
4103 p->res.seqid = seqid;
4104 p->arg.stateid = &lsp->ls_stateid;
4106 atomic_inc(&lsp->ls_count);
4107 /* Ensure we don't close file until we're done freeing locks! */
4108 p->ctx = get_nfs_open_context(ctx);
4109 memcpy(&p->fl, fl, sizeof(p->fl));
4110 p->server = NFS_SERVER(inode);
4114 static void nfs4_locku_release_calldata(void *data)
4116 struct nfs4_unlockdata *calldata = data;
4117 nfs_free_seqid(calldata->arg.seqid);
4118 nfs4_put_lock_state(calldata->lsp);
4119 put_nfs_open_context(calldata->ctx);
4123 static void nfs4_locku_done(struct rpc_task *task, void *data)
4125 struct nfs4_unlockdata *calldata = data;
4127 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4129 switch (task->tk_status) {
4131 memcpy(calldata->lsp->ls_stateid.data,
4132 calldata->res.stateid.data,
4133 sizeof(calldata->lsp->ls_stateid.data));
4134 renew_lease(calldata->server, calldata->timestamp);
4136 case -NFS4ERR_BAD_STATEID:
4137 case -NFS4ERR_OLD_STATEID:
4138 case -NFS4ERR_STALE_STATEID:
4139 case -NFS4ERR_EXPIRED:
4142 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4143 rpc_restart_call_prepare(task);
4147 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4149 struct nfs4_unlockdata *calldata = data;
4151 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4153 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4154 /* Note: exit _without_ running nfs4_locku_done */
4155 task->tk_action = NULL;
4158 calldata->timestamp = jiffies;
4159 if (nfs4_setup_sequence(calldata->server,
4160 &calldata->arg.seq_args,
4161 &calldata->res.seq_res, 1, task))
4163 rpc_call_start(task);
4166 static const struct rpc_call_ops nfs4_locku_ops = {
4167 .rpc_call_prepare = nfs4_locku_prepare,
4168 .rpc_call_done = nfs4_locku_done,
4169 .rpc_release = nfs4_locku_release_calldata,
4172 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4173 struct nfs_open_context *ctx,
4174 struct nfs4_lock_state *lsp,
4175 struct nfs_seqid *seqid)
4177 struct nfs4_unlockdata *data;
4178 struct rpc_message msg = {
4179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4180 .rpc_cred = ctx->cred,
4182 struct rpc_task_setup task_setup_data = {
4183 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4184 .rpc_message = &msg,
4185 .callback_ops = &nfs4_locku_ops,
4186 .workqueue = nfsiod_workqueue,
4187 .flags = RPC_TASK_ASYNC,
4190 /* Ensure this is an unlock - when canceling a lock, the
4191 * canceled lock is passed in, and it won't be an unlock.
4193 fl->fl_type = F_UNLCK;
4195 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4197 nfs_free_seqid(seqid);
4198 return ERR_PTR(-ENOMEM);
4201 msg.rpc_argp = &data->arg;
4202 msg.rpc_resp = &data->res;
4203 task_setup_data.callback_data = data;
4204 return rpc_run_task(&task_setup_data);
4207 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4209 struct nfs_inode *nfsi = NFS_I(state->inode);
4210 struct nfs_seqid *seqid;
4211 struct nfs4_lock_state *lsp;
4212 struct rpc_task *task;
4214 unsigned char fl_flags = request->fl_flags;
4216 status = nfs4_set_lock_state(state, request);
4217 /* Unlock _before_ we do the RPC call */
4218 request->fl_flags |= FL_EXISTS;
4219 down_read(&nfsi->rwsem);
4220 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4221 up_read(&nfsi->rwsem);
4224 up_read(&nfsi->rwsem);
4227 /* Is this a delegated lock? */
4228 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4230 lsp = request->fl_u.nfs4_fl.owner;
4231 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4235 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4236 status = PTR_ERR(task);
4239 status = nfs4_wait_for_completion_rpc_task(task);
4242 request->fl_flags = fl_flags;
4246 struct nfs4_lockdata {
4247 struct nfs_lock_args arg;
4248 struct nfs_lock_res res;
4249 struct nfs4_lock_state *lsp;
4250 struct nfs_open_context *ctx;
4251 struct file_lock fl;
4252 unsigned long timestamp;
4255 struct nfs_server *server;
4258 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4259 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4262 struct nfs4_lockdata *p;
4263 struct inode *inode = lsp->ls_state->inode;
4264 struct nfs_server *server = NFS_SERVER(inode);
4266 p = kzalloc(sizeof(*p), gfp_mask);
4270 p->arg.fh = NFS_FH(inode);
4272 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4273 if (p->arg.open_seqid == NULL)
4275 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4276 if (p->arg.lock_seqid == NULL)
4277 goto out_free_seqid;
4278 p->arg.lock_stateid = &lsp->ls_stateid;
4279 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4280 p->arg.lock_owner.id = lsp->ls_id.id;
4281 p->arg.lock_owner.s_dev = server->s_dev;
4282 p->res.lock_seqid = p->arg.lock_seqid;
4285 atomic_inc(&lsp->ls_count);
4286 p->ctx = get_nfs_open_context(ctx);
4287 memcpy(&p->fl, fl, sizeof(p->fl));
4290 nfs_free_seqid(p->arg.open_seqid);
4296 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4298 struct nfs4_lockdata *data = calldata;
4299 struct nfs4_state *state = data->lsp->ls_state;
4301 dprintk("%s: begin!\n", __func__);
4302 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4304 /* Do we need to do an open_to_lock_owner? */
4305 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4306 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4308 data->arg.open_stateid = &state->stateid;
4309 data->arg.new_lock_owner = 1;
4310 data->res.open_seqid = data->arg.open_seqid;
4312 data->arg.new_lock_owner = 0;
4313 data->timestamp = jiffies;
4314 if (nfs4_setup_sequence(data->server,
4315 &data->arg.seq_args,
4316 &data->res.seq_res, 1, task))
4318 rpc_call_start(task);
4319 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4322 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4324 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4325 nfs4_lock_prepare(task, calldata);
4328 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4330 struct nfs4_lockdata *data = calldata;
4332 dprintk("%s: begin!\n", __func__);
4334 if (!nfs4_sequence_done(task, &data->res.seq_res))
4337 data->rpc_status = task->tk_status;
4338 if (data->arg.new_lock_owner != 0) {
4339 if (data->rpc_status == 0)
4340 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4344 if (data->rpc_status == 0) {
4345 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4346 sizeof(data->lsp->ls_stateid.data));
4347 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4348 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4351 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4354 static void nfs4_lock_release(void *calldata)
4356 struct nfs4_lockdata *data = calldata;
4358 dprintk("%s: begin!\n", __func__);
4359 nfs_free_seqid(data->arg.open_seqid);
4360 if (data->cancelled != 0) {
4361 struct rpc_task *task;
4362 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4363 data->arg.lock_seqid);
4365 rpc_put_task_async(task);
4366 dprintk("%s: cancelling lock!\n", __func__);
4368 nfs_free_seqid(data->arg.lock_seqid);
4369 nfs4_put_lock_state(data->lsp);
4370 put_nfs_open_context(data->ctx);
4372 dprintk("%s: done!\n", __func__);
4375 static const struct rpc_call_ops nfs4_lock_ops = {
4376 .rpc_call_prepare = nfs4_lock_prepare,
4377 .rpc_call_done = nfs4_lock_done,
4378 .rpc_release = nfs4_lock_release,
4381 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4382 .rpc_call_prepare = nfs4_recover_lock_prepare,
4383 .rpc_call_done = nfs4_lock_done,
4384 .rpc_release = nfs4_lock_release,
4387 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4390 case -NFS4ERR_ADMIN_REVOKED:
4391 case -NFS4ERR_BAD_STATEID:
4392 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4393 if (new_lock_owner != 0 ||
4394 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4395 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4397 case -NFS4ERR_STALE_STATEID:
4398 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4399 case -NFS4ERR_EXPIRED:
4400 nfs4_schedule_lease_recovery(server->nfs_client);
4404 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4406 struct nfs4_lockdata *data;
4407 struct rpc_task *task;
4408 struct rpc_message msg = {
4409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4410 .rpc_cred = state->owner->so_cred,
4412 struct rpc_task_setup task_setup_data = {
4413 .rpc_client = NFS_CLIENT(state->inode),
4414 .rpc_message = &msg,
4415 .callback_ops = &nfs4_lock_ops,
4416 .workqueue = nfsiod_workqueue,
4417 .flags = RPC_TASK_ASYNC,
4421 dprintk("%s: begin!\n", __func__);
4422 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4423 fl->fl_u.nfs4_fl.owner,
4424 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4428 data->arg.block = 1;
4429 if (recovery_type > NFS_LOCK_NEW) {
4430 if (recovery_type == NFS_LOCK_RECLAIM)
4431 data->arg.reclaim = NFS_LOCK_RECLAIM;
4432 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4434 msg.rpc_argp = &data->arg;
4435 msg.rpc_resp = &data->res;
4436 task_setup_data.callback_data = data;
4437 task = rpc_run_task(&task_setup_data);
4439 return PTR_ERR(task);
4440 ret = nfs4_wait_for_completion_rpc_task(task);
4442 ret = data->rpc_status;
4444 nfs4_handle_setlk_error(data->server, data->lsp,
4445 data->arg.new_lock_owner, ret);
4447 data->cancelled = 1;
4449 dprintk("%s: done, ret = %d!\n", __func__, ret);
4453 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4455 struct nfs_server *server = NFS_SERVER(state->inode);
4456 struct nfs4_exception exception = {
4457 .inode = state->inode,
4462 /* Cache the lock if possible... */
4463 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4465 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4466 if (err != -NFS4ERR_DELAY)
4468 nfs4_handle_exception(server, err, &exception);
4469 } while (exception.retry);
4473 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4475 struct nfs_server *server = NFS_SERVER(state->inode);
4476 struct nfs4_exception exception = {
4477 .inode = state->inode,
4481 err = nfs4_set_lock_state(state, request);
4485 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4487 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4491 case -NFS4ERR_GRACE:
4492 case -NFS4ERR_DELAY:
4493 nfs4_handle_exception(server, err, &exception);
4496 } while (exception.retry);
4501 #if defined(CONFIG_NFS_V4_1)
4502 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4505 struct nfs_server *server = NFS_SERVER(state->inode);
4507 status = nfs41_test_stateid(server, state);
4508 if (status == NFS_OK)
4510 nfs41_free_stateid(server, state);
4511 return nfs4_lock_expired(state, request);
4515 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4517 struct nfs_inode *nfsi = NFS_I(state->inode);
4518 unsigned char fl_flags = request->fl_flags;
4519 int status = -ENOLCK;
4521 if ((fl_flags & FL_POSIX) &&
4522 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4524 /* Is this a delegated open? */
4525 status = nfs4_set_lock_state(state, request);
4528 request->fl_flags |= FL_ACCESS;
4529 status = do_vfs_lock(request->fl_file, request);
4532 down_read(&nfsi->rwsem);
4533 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4534 /* Yes: cache locks! */
4535 /* ...but avoid races with delegation recall... */
4536 request->fl_flags = fl_flags & ~FL_SLEEP;
4537 status = do_vfs_lock(request->fl_file, request);
4540 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4543 /* Note: we always want to sleep here! */
4544 request->fl_flags = fl_flags | FL_SLEEP;
4545 if (do_vfs_lock(request->fl_file, request) < 0)
4546 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4548 up_read(&nfsi->rwsem);
4550 request->fl_flags = fl_flags;
4554 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4556 struct nfs4_exception exception = {
4558 .inode = state->inode,
4563 err = _nfs4_proc_setlk(state, cmd, request);
4564 if (err == -NFS4ERR_DENIED)
4566 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4568 } while (exception.retry);
4573 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4575 struct nfs_open_context *ctx;
4576 struct nfs4_state *state;
4577 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4580 /* verify open state */
4581 ctx = nfs_file_open_context(filp);
4584 if (request->fl_start < 0 || request->fl_end < 0)
4587 if (IS_GETLK(cmd)) {
4589 return nfs4_proc_getlk(state, F_GETLK, request);
4593 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4596 if (request->fl_type == F_UNLCK) {
4598 return nfs4_proc_unlck(state, cmd, request);
4605 * Don't rely on the VFS having checked the file open mode,
4606 * since it won't do this for flock() locks.
4608 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4610 if (!(filp->f_mode & FMODE_READ))
4614 if (!(filp->f_mode & FMODE_WRITE))
4619 status = nfs4_proc_setlk(state, cmd, request);
4620 if ((status != -EAGAIN) || IS_SETLK(cmd))
4622 timeout = nfs4_set_lock_task_retry(timeout);
4623 status = -ERESTARTSYS;
4626 } while(status < 0);
4630 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4632 struct nfs_server *server = NFS_SERVER(state->inode);
4633 struct nfs4_exception exception = { };
4636 err = nfs4_set_lock_state(state, fl);
4640 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4643 printk(KERN_ERR "%s: unhandled error %d.\n",
4648 case -NFS4ERR_EXPIRED:
4649 nfs4_schedule_stateid_recovery(server, state);
4650 case -NFS4ERR_STALE_CLIENTID:
4651 case -NFS4ERR_STALE_STATEID:
4652 nfs4_schedule_lease_recovery(server->nfs_client);
4654 case -NFS4ERR_BADSESSION:
4655 case -NFS4ERR_BADSLOT:
4656 case -NFS4ERR_BAD_HIGH_SLOT:
4657 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4658 case -NFS4ERR_DEADSESSION:
4659 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4663 * The show must go on: exit, but mark the
4664 * stateid as needing recovery.
4666 case -NFS4ERR_DELEG_REVOKED:
4667 case -NFS4ERR_ADMIN_REVOKED:
4668 case -NFS4ERR_BAD_STATEID:
4669 case -NFS4ERR_OPENMODE:
4670 nfs4_schedule_stateid_recovery(server, state);
4675 * User RPCSEC_GSS context has expired.
4676 * We cannot recover this stateid now, so
4677 * skip it and allow recovery thread to
4683 case -NFS4ERR_DENIED:
4684 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4687 case -NFS4ERR_DELAY:
4690 err = nfs4_handle_exception(server, err, &exception);
4691 } while (exception.retry);
4696 static void nfs4_release_lockowner_release(void *calldata)
4701 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4702 .rpc_release = nfs4_release_lockowner_release,
4705 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4707 struct nfs_server *server = lsp->ls_state->owner->so_server;
4708 struct nfs_release_lockowner_args *args;
4709 struct rpc_message msg = {
4710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4713 if (server->nfs_client->cl_mvops->minor_version != 0)
4715 args = kmalloc(sizeof(*args), GFP_NOFS);
4718 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4719 args->lock_owner.id = lsp->ls_id.id;
4720 args->lock_owner.s_dev = server->s_dev;
4721 msg.rpc_argp = args;
4722 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4725 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4727 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4728 const void *buf, size_t buflen,
4729 int flags, int type)
4731 if (strcmp(key, "") != 0)
4734 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4737 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4738 void *buf, size_t buflen, int type)
4740 if (strcmp(key, "") != 0)
4743 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4746 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4747 size_t list_len, const char *name,
4748 size_t name_len, int type)
4750 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4752 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4755 if (list && len <= list_len)
4756 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4761 * nfs_fhget will use either the mounted_on_fileid or the fileid
4763 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4765 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4766 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4767 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4768 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4771 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4772 NFS_ATTR_FATTR_NLINK;
4773 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4777 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4778 struct nfs4_fs_locations *fs_locations, struct page *page)
4780 struct nfs_server *server = NFS_SERVER(dir);
4782 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4784 struct nfs4_fs_locations_arg args = {
4785 .dir_fh = NFS_FH(dir),
4790 struct nfs4_fs_locations_res res = {
4791 .fs_locations = fs_locations,
4793 struct rpc_message msg = {
4794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4800 dprintk("%s: start\n", __func__);
4802 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4803 * is not supported */
4804 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4805 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4807 bitmask[0] |= FATTR4_WORD0_FILEID;
4809 nfs_fattr_init(&fs_locations->fattr);
4810 fs_locations->server = server;
4811 fs_locations->nlocations = 0;
4812 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4813 dprintk("%s: returned status = %d\n", __func__, status);
4817 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4820 struct nfs4_secinfo_arg args = {
4821 .dir_fh = NFS_FH(dir),
4824 struct nfs4_secinfo_res res = {
4827 struct rpc_message msg = {
4828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4833 dprintk("NFS call secinfo %s\n", name->name);
4834 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4835 dprintk("NFS reply secinfo: %d\n", status);
4839 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4841 struct nfs4_exception exception = { };
4844 err = nfs4_handle_exception(NFS_SERVER(dir),
4845 _nfs4_proc_secinfo(dir, name, flavors),
4847 } while (exception.retry);
4851 #ifdef CONFIG_NFS_V4_1
4853 * Check the exchange flags returned by the server for invalid flags, having
4854 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4857 static int nfs4_check_cl_exchange_flags(u32 flags)
4859 if (flags & ~EXCHGID4_FLAG_MASK_R)
4861 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4862 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4864 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4868 return -NFS4ERR_INVAL;
4872 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4874 if (a->server_scope_sz == b->server_scope_sz &&
4875 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4882 * nfs4_proc_exchange_id()
4884 * Since the clientid has expired, all compounds using sessions
4885 * associated with the stale clientid will be returning
4886 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4887 * be in some phase of session reset.
4889 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4891 nfs4_verifier verifier;
4892 struct nfs41_exchange_id_args args = {
4894 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4896 struct nfs41_exchange_id_res res = {
4900 struct rpc_message msg = {
4901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4908 dprintk("--> %s\n", __func__);
4909 BUG_ON(clp == NULL);
4911 p = (u32 *)verifier.data;
4912 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4913 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4914 args.verifier = &verifier;
4916 args.id_len = scnprintf(args.id, sizeof(args.id),
4919 init_utsname()->nodename,
4920 init_utsname()->domainname,
4921 clp->cl_rpcclient->cl_auth->au_flavor);
4923 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4924 if (unlikely(!res.server_scope)) {
4929 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4931 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4934 if (clp->server_scope &&
4935 !nfs41_same_server_scope(clp->server_scope,
4936 res.server_scope)) {
4937 dprintk("%s: server_scope mismatch detected\n",
4939 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4940 kfree(clp->server_scope);
4941 clp->server_scope = NULL;
4944 if (!clp->server_scope) {
4945 clp->server_scope = res.server_scope;
4949 kfree(res.server_scope);
4951 dprintk("<-- %s status= %d\n", __func__, status);
4955 struct nfs4_get_lease_time_data {
4956 struct nfs4_get_lease_time_args *args;
4957 struct nfs4_get_lease_time_res *res;
4958 struct nfs_client *clp;
4961 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4965 struct nfs4_get_lease_time_data *data =
4966 (struct nfs4_get_lease_time_data *)calldata;
4968 dprintk("--> %s\n", __func__);
4969 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4970 /* just setup sequence, do not trigger session recovery
4971 since we're invoked within one */
4972 ret = nfs41_setup_sequence(data->clp->cl_session,
4973 &data->args->la_seq_args,
4974 &data->res->lr_seq_res, 0, task);
4976 BUG_ON(ret == -EAGAIN);
4977 rpc_call_start(task);
4978 dprintk("<-- %s\n", __func__);
4982 * Called from nfs4_state_manager thread for session setup, so don't recover
4983 * from sequence operation or clientid errors.
4985 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4987 struct nfs4_get_lease_time_data *data =
4988 (struct nfs4_get_lease_time_data *)calldata;
4990 dprintk("--> %s\n", __func__);
4991 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4993 switch (task->tk_status) {
4994 case -NFS4ERR_DELAY:
4995 case -NFS4ERR_GRACE:
4996 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4997 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4998 task->tk_status = 0;
5000 case -NFS4ERR_RETRY_UNCACHED_REP:
5001 rpc_restart_call_prepare(task);
5004 dprintk("<-- %s\n", __func__);
5007 struct rpc_call_ops nfs4_get_lease_time_ops = {
5008 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5009 .rpc_call_done = nfs4_get_lease_time_done,
5012 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5014 struct rpc_task *task;
5015 struct nfs4_get_lease_time_args args;
5016 struct nfs4_get_lease_time_res res = {
5017 .lr_fsinfo = fsinfo,
5019 struct nfs4_get_lease_time_data data = {
5024 struct rpc_message msg = {
5025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5029 struct rpc_task_setup task_setup = {
5030 .rpc_client = clp->cl_rpcclient,
5031 .rpc_message = &msg,
5032 .callback_ops = &nfs4_get_lease_time_ops,
5033 .callback_data = &data,
5034 .flags = RPC_TASK_TIMEOUT,
5038 dprintk("--> %s\n", __func__);
5039 task = rpc_run_task(&task_setup);
5042 status = PTR_ERR(task);
5044 status = task->tk_status;
5047 dprintk("<-- %s return %d\n", __func__, status);
5053 * Reset a slot table
5055 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5058 struct nfs4_slot *new = NULL;
5062 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5063 max_reqs, tbl->max_slots);
5065 /* Does the newly negotiated max_reqs match the existing slot table? */
5066 if (max_reqs != tbl->max_slots) {
5068 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5075 spin_lock(&tbl->slot_tbl_lock);
5078 tbl->max_slots = max_reqs;
5080 for (i = 0; i < tbl->max_slots; ++i)
5081 tbl->slots[i].seq_nr = ivalue;
5082 spin_unlock(&tbl->slot_tbl_lock);
5083 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5084 tbl, tbl->slots, tbl->max_slots);
5086 dprintk("<-- %s: return %d\n", __func__, ret);
5091 * Reset the forechannel and backchannel slot tables
5093 static int nfs4_reset_slot_tables(struct nfs4_session *session)
5097 status = nfs4_reset_slot_table(&session->fc_slot_table,
5098 session->fc_attrs.max_reqs, 1);
5102 status = nfs4_reset_slot_table(&session->bc_slot_table,
5103 session->bc_attrs.max_reqs, 0);
5107 /* Destroy the slot table */
5108 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5110 if (session->fc_slot_table.slots != NULL) {
5111 kfree(session->fc_slot_table.slots);
5112 session->fc_slot_table.slots = NULL;
5114 if (session->bc_slot_table.slots != NULL) {
5115 kfree(session->bc_slot_table.slots);
5116 session->bc_slot_table.slots = NULL;
5122 * Initialize slot table
5124 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5125 int max_slots, int ivalue)
5127 struct nfs4_slot *slot;
5130 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5132 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5134 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5139 spin_lock(&tbl->slot_tbl_lock);
5140 tbl->max_slots = max_slots;
5142 tbl->highest_used_slotid = -1; /* no slot is currently used */
5143 spin_unlock(&tbl->slot_tbl_lock);
5144 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5145 tbl, tbl->slots, tbl->max_slots);
5147 dprintk("<-- %s: return %d\n", __func__, ret);
5152 * Initialize the forechannel and backchannel tables
5154 static int nfs4_init_slot_tables(struct nfs4_session *session)
5156 struct nfs4_slot_table *tbl;
5159 tbl = &session->fc_slot_table;
5160 if (tbl->slots == NULL) {
5161 status = nfs4_init_slot_table(tbl,
5162 session->fc_attrs.max_reqs, 1);
5167 tbl = &session->bc_slot_table;
5168 if (tbl->slots == NULL) {
5169 status = nfs4_init_slot_table(tbl,
5170 session->bc_attrs.max_reqs, 0);
5172 nfs4_destroy_slot_tables(session);
5178 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5180 struct nfs4_session *session;
5181 struct nfs4_slot_table *tbl;
5183 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5187 tbl = &session->fc_slot_table;
5188 tbl->highest_used_slotid = -1;
5189 spin_lock_init(&tbl->slot_tbl_lock);
5190 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5191 init_completion(&tbl->complete);
5193 tbl = &session->bc_slot_table;
5194 tbl->highest_used_slotid = -1;
5195 spin_lock_init(&tbl->slot_tbl_lock);
5196 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5197 init_completion(&tbl->complete);
5199 session->session_state = 1<<NFS4_SESSION_INITING;
5205 void nfs4_destroy_session(struct nfs4_session *session)
5207 nfs4_proc_destroy_session(session);
5208 dprintk("%s Destroy backchannel for xprt %p\n",
5209 __func__, session->clp->cl_rpcclient->cl_xprt);
5210 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5211 NFS41_BC_MIN_CALLBACKS);
5212 nfs4_destroy_slot_tables(session);
5217 * Initialize the values to be used by the client in CREATE_SESSION
5218 * If nfs4_init_session set the fore channel request and response sizes,
5221 * Set the back channel max_resp_sz_cached to zero to force the client to
5222 * always set csa_cachethis to FALSE because the current implementation
5223 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5225 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5227 struct nfs4_session *session = args->client->cl_session;
5228 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5229 mxresp_sz = session->fc_attrs.max_resp_sz;
5232 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5234 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5235 /* Fore channel attributes */
5236 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5237 args->fc_attrs.max_resp_sz = mxresp_sz;
5238 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5239 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5241 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5242 "max_ops=%u max_reqs=%u\n",
5244 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5245 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5247 /* Back channel attributes */
5248 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5249 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5250 args->bc_attrs.max_resp_sz_cached = 0;
5251 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5252 args->bc_attrs.max_reqs = 1;
5254 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5255 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5257 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5258 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5259 args->bc_attrs.max_reqs);
5262 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5264 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5265 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5267 if (rcvd->max_resp_sz > sent->max_resp_sz)
5270 * Our requested max_ops is the minimum we need; we're not
5271 * prepared to break up compounds into smaller pieces than that.
5272 * So, no point even trying to continue if the server won't
5275 if (rcvd->max_ops < sent->max_ops)
5277 if (rcvd->max_reqs == 0)
5282 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5284 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5285 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5287 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5289 if (rcvd->max_resp_sz < sent->max_resp_sz)
5291 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5293 /* These would render the backchannel useless: */
5294 if (rcvd->max_ops == 0)
5296 if (rcvd->max_reqs == 0)
5301 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5302 struct nfs4_session *session)
5306 ret = nfs4_verify_fore_channel_attrs(args, session);
5309 return nfs4_verify_back_channel_attrs(args, session);
5312 static int _nfs4_proc_create_session(struct nfs_client *clp)
5314 struct nfs4_session *session = clp->cl_session;
5315 struct nfs41_create_session_args args = {
5317 .cb_program = NFS4_CALLBACK,
5319 struct nfs41_create_session_res res = {
5322 struct rpc_message msg = {
5323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5329 nfs4_init_channel_attrs(&args);
5330 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5332 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5335 /* Verify the session's negotiated channel_attrs values */
5336 status = nfs4_verify_channel_attrs(&args, session);
5338 /* Increment the clientid slot sequence id */
5346 * Issues a CREATE_SESSION operation to the server.
5347 * It is the responsibility of the caller to verify the session is
5348 * expired before calling this routine.
5350 int nfs4_proc_create_session(struct nfs_client *clp)
5354 struct nfs4_session *session = clp->cl_session;
5356 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5358 status = _nfs4_proc_create_session(clp);
5362 /* Init and reset the fore channel */
5363 status = nfs4_init_slot_tables(session);
5364 dprintk("slot table initialization returned %d\n", status);
5367 status = nfs4_reset_slot_tables(session);
5368 dprintk("slot table reset returned %d\n", status);
5372 ptr = (unsigned *)&session->sess_id.data[0];
5373 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5374 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5376 dprintk("<-- %s\n", __func__);
5381 * Issue the over-the-wire RPC DESTROY_SESSION.
5382 * The caller must serialize access to this routine.
5384 int nfs4_proc_destroy_session(struct nfs4_session *session)
5387 struct rpc_message msg;
5389 dprintk("--> nfs4_proc_destroy_session\n");
5391 /* session is still being setup */
5392 if (session->clp->cl_cons_state != NFS_CS_READY)
5395 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5396 msg.rpc_argp = session;
5397 msg.rpc_resp = NULL;
5398 msg.rpc_cred = NULL;
5399 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5403 "Got error %d from the server on DESTROY_SESSION. "
5404 "Session has been destroyed regardless...\n", status);
5406 dprintk("<-- nfs4_proc_destroy_session\n");
5410 int nfs4_init_session(struct nfs_server *server)
5412 struct nfs_client *clp = server->nfs_client;
5413 struct nfs4_session *session;
5414 unsigned int rsize, wsize;
5417 if (!nfs4_has_session(clp))
5420 session = clp->cl_session;
5421 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5424 rsize = server->rsize;
5426 rsize = NFS_MAX_FILE_IO_SIZE;
5427 wsize = server->wsize;
5429 wsize = NFS_MAX_FILE_IO_SIZE;
5431 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5432 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5434 ret = nfs4_recover_expired_lease(server);
5436 ret = nfs4_check_client_ready(clp);
5440 int nfs4_init_ds_session(struct nfs_client *clp)
5442 struct nfs4_session *session = clp->cl_session;
5445 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5448 ret = nfs4_client_recover_expired_lease(clp);
5450 /* Test for the DS role */
5451 if (!is_ds_client(clp))
5454 ret = nfs4_check_client_ready(clp);
5458 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5462 * Renew the cl_session lease.
5464 struct nfs4_sequence_data {
5465 struct nfs_client *clp;
5466 struct nfs4_sequence_args args;
5467 struct nfs4_sequence_res res;
5470 static void nfs41_sequence_release(void *data)
5472 struct nfs4_sequence_data *calldata = data;
5473 struct nfs_client *clp = calldata->clp;
5475 if (atomic_read(&clp->cl_count) > 1)
5476 nfs4_schedule_state_renewal(clp);
5477 nfs_put_client(clp);
5481 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5483 switch(task->tk_status) {
5484 case -NFS4ERR_DELAY:
5485 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5488 nfs4_schedule_lease_recovery(clp);
5493 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5495 struct nfs4_sequence_data *calldata = data;
5496 struct nfs_client *clp = calldata->clp;
5498 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5501 if (task->tk_status < 0) {
5502 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5503 if (atomic_read(&clp->cl_count) == 1)
5506 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5507 rpc_restart_call_prepare(task);
5511 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5513 dprintk("<-- %s\n", __func__);
5516 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5518 struct nfs4_sequence_data *calldata = data;
5519 struct nfs_client *clp = calldata->clp;
5520 struct nfs4_sequence_args *args;
5521 struct nfs4_sequence_res *res;
5523 args = task->tk_msg.rpc_argp;
5524 res = task->tk_msg.rpc_resp;
5526 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5528 rpc_call_start(task);
5531 static const struct rpc_call_ops nfs41_sequence_ops = {
5532 .rpc_call_done = nfs41_sequence_call_done,
5533 .rpc_call_prepare = nfs41_sequence_prepare,
5534 .rpc_release = nfs41_sequence_release,
5537 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5539 struct nfs4_sequence_data *calldata;
5540 struct rpc_message msg = {
5541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5544 struct rpc_task_setup task_setup_data = {
5545 .rpc_client = clp->cl_rpcclient,
5546 .rpc_message = &msg,
5547 .callback_ops = &nfs41_sequence_ops,
5548 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5551 if (!atomic_inc_not_zero(&clp->cl_count))
5552 return ERR_PTR(-EIO);
5553 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5554 if (calldata == NULL) {
5555 nfs_put_client(clp);
5556 return ERR_PTR(-ENOMEM);
5558 msg.rpc_argp = &calldata->args;
5559 msg.rpc_resp = &calldata->res;
5560 calldata->clp = clp;
5561 task_setup_data.callback_data = calldata;
5563 return rpc_run_task(&task_setup_data);
5566 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5568 struct rpc_task *task;
5571 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5573 task = _nfs41_proc_sequence(clp, cred);
5575 ret = PTR_ERR(task);
5577 rpc_put_task_async(task);
5578 dprintk("<-- %s status=%d\n", __func__, ret);
5582 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5584 struct rpc_task *task;
5587 task = _nfs41_proc_sequence(clp, cred);
5589 ret = PTR_ERR(task);
5592 ret = rpc_wait_for_completion_task(task);
5594 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5596 if (task->tk_status == 0)
5597 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5598 ret = task->tk_status;
5602 dprintk("<-- %s status=%d\n", __func__, ret);
5606 struct nfs4_reclaim_complete_data {
5607 struct nfs_client *clp;
5608 struct nfs41_reclaim_complete_args arg;
5609 struct nfs41_reclaim_complete_res res;
5612 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5614 struct nfs4_reclaim_complete_data *calldata = data;
5616 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5617 if (nfs41_setup_sequence(calldata->clp->cl_session,
5618 &calldata->arg.seq_args,
5619 &calldata->res.seq_res, 0, task))
5622 rpc_call_start(task);
5625 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5627 switch(task->tk_status) {
5629 case -NFS4ERR_COMPLETE_ALREADY:
5630 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5632 case -NFS4ERR_DELAY:
5633 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5635 case -NFS4ERR_RETRY_UNCACHED_REP:
5638 nfs4_schedule_lease_recovery(clp);
5643 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5645 struct nfs4_reclaim_complete_data *calldata = data;
5646 struct nfs_client *clp = calldata->clp;
5647 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5649 dprintk("--> %s\n", __func__);
5650 if (!nfs41_sequence_done(task, res))
5653 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5654 rpc_restart_call_prepare(task);
5657 dprintk("<-- %s\n", __func__);
5660 static void nfs4_free_reclaim_complete_data(void *data)
5662 struct nfs4_reclaim_complete_data *calldata = data;
5667 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5668 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5669 .rpc_call_done = nfs4_reclaim_complete_done,
5670 .rpc_release = nfs4_free_reclaim_complete_data,
5674 * Issue a global reclaim complete.
5676 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5678 struct nfs4_reclaim_complete_data *calldata;
5679 struct rpc_task *task;
5680 struct rpc_message msg = {
5681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5683 struct rpc_task_setup task_setup_data = {
5684 .rpc_client = clp->cl_rpcclient,
5685 .rpc_message = &msg,
5686 .callback_ops = &nfs4_reclaim_complete_call_ops,
5687 .flags = RPC_TASK_ASYNC,
5689 int status = -ENOMEM;
5691 dprintk("--> %s\n", __func__);
5692 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5693 if (calldata == NULL)
5695 calldata->clp = clp;
5696 calldata->arg.one_fs = 0;
5698 msg.rpc_argp = &calldata->arg;
5699 msg.rpc_resp = &calldata->res;
5700 task_setup_data.callback_data = calldata;
5701 task = rpc_run_task(&task_setup_data);
5703 status = PTR_ERR(task);
5706 status = nfs4_wait_for_completion_rpc_task(task);
5708 status = task->tk_status;
5712 dprintk("<-- %s status=%d\n", __func__, status);
5717 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5719 struct nfs4_layoutget *lgp = calldata;
5720 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5722 dprintk("--> %s\n", __func__);
5723 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5724 * right now covering the LAYOUTGET we are about to send.
5725 * However, that is not so catastrophic, and there seems
5726 * to be no way to prevent it completely.
5728 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5729 &lgp->res.seq_res, 0, task))
5731 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5732 NFS_I(lgp->args.inode)->layout,
5733 lgp->args.ctx->state)) {
5734 rpc_exit(task, NFS4_OK);
5737 rpc_call_start(task);
5740 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5742 struct nfs4_layoutget *lgp = calldata;
5743 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5745 dprintk("--> %s\n", __func__);
5747 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5750 switch (task->tk_status) {
5753 case -NFS4ERR_LAYOUTTRYLATER:
5754 case -NFS4ERR_RECALLCONFLICT:
5755 task->tk_status = -NFS4ERR_DELAY;
5758 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5759 rpc_restart_call_prepare(task);
5763 dprintk("<-- %s\n", __func__);
5766 static void nfs4_layoutget_release(void *calldata)
5768 struct nfs4_layoutget *lgp = calldata;
5770 dprintk("--> %s\n", __func__);
5771 put_nfs_open_context(lgp->args.ctx);
5773 dprintk("<-- %s\n", __func__);
5776 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5777 .rpc_call_prepare = nfs4_layoutget_prepare,
5778 .rpc_call_done = nfs4_layoutget_done,
5779 .rpc_release = nfs4_layoutget_release,
5782 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5784 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5785 struct rpc_task *task;
5786 struct rpc_message msg = {
5787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5788 .rpc_argp = &lgp->args,
5789 .rpc_resp = &lgp->res,
5791 struct rpc_task_setup task_setup_data = {
5792 .rpc_client = server->client,
5793 .rpc_message = &msg,
5794 .callback_ops = &nfs4_layoutget_call_ops,
5795 .callback_data = lgp,
5796 .flags = RPC_TASK_ASYNC,
5800 dprintk("--> %s\n", __func__);
5802 lgp->res.layoutp = &lgp->args.layout;
5803 lgp->res.seq_res.sr_slot = NULL;
5804 task = rpc_run_task(&task_setup_data);
5806 return PTR_ERR(task);
5807 status = nfs4_wait_for_completion_rpc_task(task);
5809 status = task->tk_status;
5811 status = pnfs_layout_process(lgp);
5813 dprintk("<-- %s status=%d\n", __func__, status);
5818 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5820 struct nfs4_layoutreturn *lrp = calldata;
5822 dprintk("--> %s\n", __func__);
5823 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5824 &lrp->res.seq_res, 0, task))
5826 rpc_call_start(task);
5829 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5831 struct nfs4_layoutreturn *lrp = calldata;
5832 struct nfs_server *server;
5833 struct pnfs_layout_hdr *lo = lrp->args.layout;
5835 dprintk("--> %s\n", __func__);
5837 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5840 server = NFS_SERVER(lrp->args.inode);
5841 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5842 rpc_restart_call_prepare(task);
5845 spin_lock(&lo->plh_inode->i_lock);
5846 if (task->tk_status == 0) {
5847 if (lrp->res.lrs_present) {
5848 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5850 BUG_ON(!list_empty(&lo->plh_segs));
5852 lo->plh_block_lgets--;
5853 spin_unlock(&lo->plh_inode->i_lock);
5854 dprintk("<-- %s\n", __func__);
5857 static void nfs4_layoutreturn_release(void *calldata)
5859 struct nfs4_layoutreturn *lrp = calldata;
5861 dprintk("--> %s\n", __func__);
5862 put_layout_hdr(lrp->args.layout);
5864 dprintk("<-- %s\n", __func__);
5867 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5868 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5869 .rpc_call_done = nfs4_layoutreturn_done,
5870 .rpc_release = nfs4_layoutreturn_release,
5873 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5875 struct rpc_task *task;
5876 struct rpc_message msg = {
5877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5878 .rpc_argp = &lrp->args,
5879 .rpc_resp = &lrp->res,
5881 struct rpc_task_setup task_setup_data = {
5882 .rpc_client = lrp->clp->cl_rpcclient,
5883 .rpc_message = &msg,
5884 .callback_ops = &nfs4_layoutreturn_call_ops,
5885 .callback_data = lrp,
5889 dprintk("--> %s\n", __func__);
5890 task = rpc_run_task(&task_setup_data);
5892 return PTR_ERR(task);
5893 status = task->tk_status;
5894 dprintk("<-- %s status=%d\n", __func__, status);
5900 * Retrieve the list of Data Server devices from the MDS.
5902 static int _nfs4_getdevicelist(struct nfs_server *server,
5903 const struct nfs_fh *fh,
5904 struct pnfs_devicelist *devlist)
5906 struct nfs4_getdevicelist_args args = {
5908 .layoutclass = server->pnfs_curr_ld->id,
5910 struct nfs4_getdevicelist_res res = {
5913 struct rpc_message msg = {
5914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5920 dprintk("--> %s\n", __func__);
5921 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5923 dprintk("<-- %s status=%d\n", __func__, status);
5927 int nfs4_proc_getdevicelist(struct nfs_server *server,
5928 const struct nfs_fh *fh,
5929 struct pnfs_devicelist *devlist)
5931 struct nfs4_exception exception = { };
5935 err = nfs4_handle_exception(server,
5936 _nfs4_getdevicelist(server, fh, devlist),
5938 } while (exception.retry);
5940 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5941 err, devlist->num_devs);
5945 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5948 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5950 struct nfs4_getdeviceinfo_args args = {
5953 struct nfs4_getdeviceinfo_res res = {
5956 struct rpc_message msg = {
5957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5963 dprintk("--> %s\n", __func__);
5964 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5965 dprintk("<-- %s status=%d\n", __func__, status);
5970 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5972 struct nfs4_exception exception = { };
5976 err = nfs4_handle_exception(server,
5977 _nfs4_proc_getdeviceinfo(server, pdev),
5979 } while (exception.retry);
5982 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5984 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5986 struct nfs4_layoutcommit_data *data = calldata;
5987 struct nfs_server *server = NFS_SERVER(data->args.inode);
5989 if (nfs4_setup_sequence(server, &data->args.seq_args,
5990 &data->res.seq_res, 1, task))
5992 rpc_call_start(task);
5996 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5998 struct nfs4_layoutcommit_data *data = calldata;
5999 struct nfs_server *server = NFS_SERVER(data->args.inode);
6001 if (!nfs4_sequence_done(task, &data->res.seq_res))
6004 switch (task->tk_status) { /* Just ignore these failures */
6005 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6006 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6007 case -NFS4ERR_BADLAYOUT: /* no layout */
6008 case -NFS4ERR_GRACE: /* loca_recalim always false */
6009 task->tk_status = 0;
6012 nfs_post_op_update_inode_force_wcc(data->args.inode,
6016 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6017 rpc_restart_call_prepare(task);
6023 static void nfs4_layoutcommit_release(void *calldata)
6025 struct nfs4_layoutcommit_data *data = calldata;
6026 struct pnfs_layout_segment *lseg, *tmp;
6027 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6029 pnfs_cleanup_layoutcommit(data);
6030 /* Matched by references in pnfs_set_layoutcommit */
6031 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6032 list_del_init(&lseg->pls_lc_list);
6033 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6038 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6039 smp_mb__after_clear_bit();
6040 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6042 put_rpccred(data->cred);
6046 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6047 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6048 .rpc_call_done = nfs4_layoutcommit_done,
6049 .rpc_release = nfs4_layoutcommit_release,
6053 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6055 struct rpc_message msg = {
6056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6057 .rpc_argp = &data->args,
6058 .rpc_resp = &data->res,
6059 .rpc_cred = data->cred,
6061 struct rpc_task_setup task_setup_data = {
6062 .task = &data->task,
6063 .rpc_client = NFS_CLIENT(data->args.inode),
6064 .rpc_message = &msg,
6065 .callback_ops = &nfs4_layoutcommit_ops,
6066 .callback_data = data,
6067 .flags = RPC_TASK_ASYNC,
6069 struct rpc_task *task;
6072 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6073 "lbw: %llu inode %lu\n",
6074 data->task.tk_pid, sync,
6075 data->args.lastbytewritten,
6076 data->args.inode->i_ino);
6078 task = rpc_run_task(&task_setup_data);
6080 return PTR_ERR(task);
6083 status = nfs4_wait_for_completion_rpc_task(task);
6086 status = task->tk_status;
6088 dprintk("%s: status %d\n", __func__, status);
6094 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6095 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6097 struct nfs41_secinfo_no_name_args args = {
6098 .style = SECINFO_STYLE_CURRENT_FH,
6100 struct nfs4_secinfo_res res = {
6103 struct rpc_message msg = {
6104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6108 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6112 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6113 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6115 struct nfs4_exception exception = { };
6118 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6121 case -NFS4ERR_WRONGSEC:
6122 case -NFS4ERR_NOTSUPP:
6125 err = nfs4_handle_exception(server, err, &exception);
6127 } while (exception.retry);
6133 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6134 struct nfs_fsinfo *info)
6138 rpc_authflavor_t flavor;
6139 struct nfs4_secinfo_flavors *flavors;
6141 page = alloc_page(GFP_KERNEL);
6147 flavors = page_address(page);
6148 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6151 * Fall back on "guess and check" method if
6152 * the server doesn't support SECINFO_NO_NAME
6154 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6155 err = nfs4_find_root_sec(server, fhandle, info);
6161 flavor = nfs_find_best_sec(flavors);
6163 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6172 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6175 struct nfs41_test_stateid_args args = {
6176 .stateid = &state->stateid,
6178 struct nfs41_test_stateid_res res;
6179 struct rpc_message msg = {
6180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6184 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6185 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6189 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6191 struct nfs4_exception exception = { };
6194 err = nfs4_handle_exception(server,
6195 _nfs41_test_stateid(server, state),
6197 } while (exception.retry);
6201 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6204 struct nfs41_free_stateid_args args = {
6205 .stateid = &state->stateid,
6207 struct nfs41_free_stateid_res res;
6208 struct rpc_message msg = {
6209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6214 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6215 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6219 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6221 struct nfs4_exception exception = { };
6224 err = nfs4_handle_exception(server,
6225 _nfs4_free_stateid(server, state),
6227 } while (exception.retry);
6230 #endif /* CONFIG_NFS_V4_1 */
6232 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6233 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6234 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6235 .recover_open = nfs4_open_reclaim,
6236 .recover_lock = nfs4_lock_reclaim,
6237 .establish_clid = nfs4_init_clientid,
6238 .get_clid_cred = nfs4_get_setclientid_cred,
6241 #if defined(CONFIG_NFS_V4_1)
6242 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6243 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6244 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6245 .recover_open = nfs4_open_reclaim,
6246 .recover_lock = nfs4_lock_reclaim,
6247 .establish_clid = nfs41_init_clientid,
6248 .get_clid_cred = nfs4_get_exchange_id_cred,
6249 .reclaim_complete = nfs41_proc_reclaim_complete,
6251 #endif /* CONFIG_NFS_V4_1 */
6253 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6254 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6255 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6256 .recover_open = nfs4_open_expired,
6257 .recover_lock = nfs4_lock_expired,
6258 .establish_clid = nfs4_init_clientid,
6259 .get_clid_cred = nfs4_get_setclientid_cred,
6262 #if defined(CONFIG_NFS_V4_1)
6263 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6264 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6265 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6266 .recover_open = nfs41_open_expired,
6267 .recover_lock = nfs41_lock_expired,
6268 .establish_clid = nfs41_init_clientid,
6269 .get_clid_cred = nfs4_get_exchange_id_cred,
6271 #endif /* CONFIG_NFS_V4_1 */
6273 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6274 .sched_state_renewal = nfs4_proc_async_renew,
6275 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6276 .renew_lease = nfs4_proc_renew,
6279 #if defined(CONFIG_NFS_V4_1)
6280 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6281 .sched_state_renewal = nfs41_proc_async_sequence,
6282 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6283 .renew_lease = nfs4_proc_sequence,
6287 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6289 .call_sync = _nfs4_call_sync,
6290 .validate_stateid = nfs4_validate_delegation_stateid,
6291 .find_root_sec = nfs4_find_root_sec,
6292 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6293 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6294 .state_renewal_ops = &nfs40_state_renewal_ops,
6297 #if defined(CONFIG_NFS_V4_1)
6298 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6300 .call_sync = _nfs4_call_sync_session,
6301 .validate_stateid = nfs41_validate_delegation_stateid,
6302 .find_root_sec = nfs41_find_root_sec,
6303 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6304 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6305 .state_renewal_ops = &nfs41_state_renewal_ops,
6309 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6310 [0] = &nfs_v4_0_minor_ops,
6311 #if defined(CONFIG_NFS_V4_1)
6312 [1] = &nfs_v4_1_minor_ops,
6316 static const struct inode_operations nfs4_file_inode_operations = {
6317 .permission = nfs_permission,
6318 .getattr = nfs_getattr,
6319 .setattr = nfs_setattr,
6320 .getxattr = generic_getxattr,
6321 .setxattr = generic_setxattr,
6322 .listxattr = generic_listxattr,
6323 .removexattr = generic_removexattr,
6326 const struct nfs_rpc_ops nfs_v4_clientops = {
6327 .version = 4, /* protocol version */
6328 .dentry_ops = &nfs4_dentry_operations,
6329 .dir_inode_ops = &nfs4_dir_inode_operations,
6330 .file_inode_ops = &nfs4_file_inode_operations,
6331 .file_ops = &nfs4_file_operations,
6332 .getroot = nfs4_proc_get_root,
6333 .getattr = nfs4_proc_getattr,
6334 .setattr = nfs4_proc_setattr,
6335 .lookup = nfs4_proc_lookup,
6336 .access = nfs4_proc_access,
6337 .readlink = nfs4_proc_readlink,
6338 .create = nfs4_proc_create,
6339 .remove = nfs4_proc_remove,
6340 .unlink_setup = nfs4_proc_unlink_setup,
6341 .unlink_done = nfs4_proc_unlink_done,
6342 .rename = nfs4_proc_rename,
6343 .rename_setup = nfs4_proc_rename_setup,
6344 .rename_done = nfs4_proc_rename_done,
6345 .link = nfs4_proc_link,
6346 .symlink = nfs4_proc_symlink,
6347 .mkdir = nfs4_proc_mkdir,
6348 .rmdir = nfs4_proc_remove,
6349 .readdir = nfs4_proc_readdir,
6350 .mknod = nfs4_proc_mknod,
6351 .statfs = nfs4_proc_statfs,
6352 .fsinfo = nfs4_proc_fsinfo,
6353 .pathconf = nfs4_proc_pathconf,
6354 .set_capabilities = nfs4_server_capabilities,
6355 .decode_dirent = nfs4_decode_dirent,
6356 .read_setup = nfs4_proc_read_setup,
6357 .read_done = nfs4_read_done,
6358 .write_setup = nfs4_proc_write_setup,
6359 .write_done = nfs4_write_done,
6360 .commit_setup = nfs4_proc_commit_setup,
6361 .commit_done = nfs4_commit_done,
6362 .lock = nfs4_proc_lock,
6363 .clear_acl_cache = nfs4_zap_acl_attr,
6364 .close_context = nfs4_close_context,
6365 .open_context = nfs4_atomic_open,
6366 .init_client = nfs4_init_client,
6367 .secinfo = nfs4_proc_secinfo,
6370 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6371 .prefix = XATTR_NAME_NFSV4_ACL,
6372 .list = nfs4_xattr_list_nfs4_acl,
6373 .get = nfs4_xattr_get_nfs4_acl,
6374 .set = nfs4_xattr_set_nfs4_acl,
6377 const struct xattr_handler *nfs4_xattr_handlers[] = {
6378 &nfs4_xattr_nfs4_acl_handler,