4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/sunrpc/gss_api.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/nfs_idmap.h>
56 #include <linux/sunrpc/bc_xprt.h>
57 #include <linux/xattr.h>
58 #include <linux/utsname.h>
59 #include <linux/freezer.h>
62 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
75 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
78 static int _nfs4_proc_open(struct nfs4_opendata *data);
79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state);
87 #ifdef CONFIG_NFS_V4_1
88 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
91 /* Prevent leaks of NFSv4 errors into userland */
92 static int nfs4_map_errors(int err)
97 case -NFS4ERR_RESOURCE:
99 case -NFS4ERR_WRONGSEC:
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
105 dprintk("%s could not handle NFSv4 error %d\n",
113 * This is our standard bitmap for GETATTR requests.
115 const u32 nfs4_fattr_bitmap[2] = {
117 | FATTR4_WORD0_CHANGE
120 | FATTR4_WORD0_FILEID,
122 | FATTR4_WORD1_NUMLINKS
124 | FATTR4_WORD1_OWNER_GROUP
125 | FATTR4_WORD1_RAWDEV
126 | FATTR4_WORD1_SPACE_USED
127 | FATTR4_WORD1_TIME_ACCESS
128 | FATTR4_WORD1_TIME_METADATA
129 | FATTR4_WORD1_TIME_MODIFY
132 const u32 nfs4_statfs_bitmap[2] = {
133 FATTR4_WORD0_FILES_AVAIL
134 | FATTR4_WORD0_FILES_FREE
135 | FATTR4_WORD0_FILES_TOTAL,
136 FATTR4_WORD1_SPACE_AVAIL
137 | FATTR4_WORD1_SPACE_FREE
138 | FATTR4_WORD1_SPACE_TOTAL
141 const u32 nfs4_pathconf_bitmap[2] = {
143 | FATTR4_WORD0_MAXNAME,
147 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
148 | FATTR4_WORD0_MAXREAD
149 | FATTR4_WORD0_MAXWRITE
150 | FATTR4_WORD0_LEASE_TIME,
151 FATTR4_WORD1_TIME_DELTA
152 | FATTR4_WORD1_FS_LAYOUT_TYPES,
153 FATTR4_WORD2_LAYOUT_BLKSIZE
156 const u32 nfs4_fs_locations_bitmap[2] = {
158 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
164 | FATTR4_WORD1_NUMLINKS
166 | FATTR4_WORD1_OWNER_GROUP
167 | FATTR4_WORD1_RAWDEV
168 | FATTR4_WORD1_SPACE_USED
169 | FATTR4_WORD1_TIME_ACCESS
170 | FATTR4_WORD1_TIME_METADATA
171 | FATTR4_WORD1_TIME_MODIFY
172 | FATTR4_WORD1_MOUNTED_ON_FILEID
175 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
176 struct nfs4_readdir_arg *readdir)
180 BUG_ON(readdir->count < 80);
182 readdir->cookie = cookie;
183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
193 * NFSv4 servers do not return entries for '.' and '..'
194 * Therefore, we fake these entries here. We let '.'
195 * have cookie 0 and '..' have cookie 1. Note that
196 * when talking to the server, we always send cookie 0
199 start = p = kmap_atomic(*readdir->pages, KM_USER0);
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_one; /* cookie, second word */
205 *p++ = xdr_one; /* entry len */
206 memcpy(p, ".\0\0\0", 4); /* entry */
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
214 *p++ = xdr_one; /* next */
215 *p++ = xdr_zero; /* cookie, first word */
216 *p++ = xdr_two; /* cookie, second word */
217 *p++ = xdr_two; /* entry len */
218 memcpy(p, "..\0\0", 4); /* entry */
220 *p++ = xdr_one; /* bitmap length */
221 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
222 *p++ = htonl(8); /* attribute buffer length */
223 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
227 kunmap_atomic(start, KM_USER0);
230 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
237 nfs_wait_bit_killable, TASK_KILLABLE);
241 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
251 freezable_schedule_timeout_killable(*timeout);
252 if (fatal_signal_pending(current))
258 /* This is the error handling routine for processes that are allowed
261 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
263 struct nfs_client *clp = server->nfs_client;
264 struct nfs4_state *state = exception->state;
267 exception->retry = 0;
271 case -NFS4ERR_DELEG_REVOKED:
272 case -NFS4ERR_ADMIN_REVOKED:
273 case -NFS4ERR_BAD_STATEID:
275 nfs_remove_bad_delegation(state->inode);
276 case -NFS4ERR_OPENMODE:
279 nfs4_schedule_stateid_recovery(server, state);
280 goto wait_on_recovery;
281 case -NFS4ERR_EXPIRED:
283 nfs4_schedule_stateid_recovery(server, state);
284 case -NFS4ERR_STALE_STATEID:
285 case -NFS4ERR_STALE_CLIENTID:
286 nfs4_schedule_lease_recovery(clp);
287 goto wait_on_recovery;
288 #if defined(CONFIG_NFS_V4_1)
289 case -NFS4ERR_BADSESSION:
290 case -NFS4ERR_BADSLOT:
291 case -NFS4ERR_BAD_HIGH_SLOT:
292 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
293 case -NFS4ERR_DEADSESSION:
294 case -NFS4ERR_SEQ_FALSE_RETRY:
295 case -NFS4ERR_SEQ_MISORDERED:
296 dprintk("%s ERROR: %d Reset session\n", __func__,
298 nfs4_schedule_session_recovery(clp->cl_session);
299 exception->retry = 1;
301 #endif /* defined(CONFIG_NFS_V4_1) */
302 case -NFS4ERR_FILE_OPEN:
303 if (exception->timeout > HZ) {
304 /* We have retried a decent amount, time to
313 ret = nfs4_delay(server->client, &exception->timeout);
316 case -NFS4ERR_RETRY_UNCACHED_REP:
317 case -NFS4ERR_OLD_STATEID:
318 exception->retry = 1;
320 case -NFS4ERR_BADOWNER:
321 /* The following works around a Linux server bug! */
322 case -NFS4ERR_BADNAME:
323 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
324 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
325 exception->retry = 1;
326 printk(KERN_WARNING "NFS: v4 server %s "
327 "does not accept raw "
329 "Reenabling the idmapper.\n",
330 server->nfs_client->cl_hostname);
333 /* We failed to handle the error */
334 return nfs4_map_errors(ret);
336 ret = nfs4_wait_clnt_recover(clp);
338 exception->retry = 1;
343 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
345 spin_lock(&clp->cl_lock);
346 if (time_before(clp->cl_last_renewal,timestamp))
347 clp->cl_last_renewal = timestamp;
348 spin_unlock(&clp->cl_lock);
351 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
353 do_renew_lease(server->nfs_client, timestamp);
356 #if defined(CONFIG_NFS_V4_1)
359 * nfs4_free_slot - free a slot and efficiently update slot table.
361 * freeing a slot is trivially done by clearing its respective bit
363 * If the freed slotid equals highest_used_slotid we want to update it
364 * so that the server would be able to size down the slot table if needed,
365 * otherwise we know that the highest_used_slotid is still in use.
366 * When updating highest_used_slotid there may be "holes" in the bitmap
367 * so we need to scan down from highest_used_slotid to 0 looking for the now
368 * highest slotid in use.
369 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
371 * Must be called while holding tbl->slot_tbl_lock
374 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
376 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
377 /* clear used bit in bitmap */
378 __clear_bit(slotid, tbl->used_slots);
380 /* update highest_used_slotid when it is freed */
381 if (slotid == tbl->highest_used_slotid) {
382 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
383 if (slotid < tbl->max_slots)
384 tbl->highest_used_slotid = slotid;
386 tbl->highest_used_slotid = NFS4_NO_SLOT;
388 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
389 slotid, tbl->highest_used_slotid);
392 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
394 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
399 * Signal state manager thread if session fore channel is drained
401 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
403 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
404 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
405 nfs4_set_task_privileged, NULL);
409 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
412 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
413 complete(&ses->fc_slot_table.complete);
417 * Signal state manager thread if session back channel is drained
419 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
421 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
422 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
424 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
425 complete(&ses->bc_slot_table.complete);
428 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
430 struct nfs4_slot_table *tbl;
432 tbl = &res->sr_session->fc_slot_table;
434 /* just wake up the next guy waiting since
435 * we may have not consumed a slot after all */
436 dprintk("%s: No slot\n", __func__);
440 spin_lock(&tbl->slot_tbl_lock);
441 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
442 nfs4_check_drain_fc_complete(res->sr_session);
443 spin_unlock(&tbl->slot_tbl_lock);
447 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
449 unsigned long timestamp;
450 struct nfs_client *clp;
453 * sr_status remains 1 if an RPC level error occurred. The server
454 * may or may not have processed the sequence operation..
455 * Proceed as if the server received and processed the sequence
458 if (res->sr_status == 1)
459 res->sr_status = NFS_OK;
461 /* don't increment the sequence number if the task wasn't sent */
462 if (!RPC_WAS_SENT(task))
465 /* Check the SEQUENCE operation status */
466 switch (res->sr_status) {
468 /* Update the slot's sequence and clientid lease timer */
469 ++res->sr_slot->seq_nr;
470 timestamp = res->sr_renewal_time;
471 clp = res->sr_session->clp;
472 do_renew_lease(clp, timestamp);
473 /* Check sequence flags */
474 if (res->sr_status_flags != 0)
475 nfs4_schedule_lease_recovery(clp);
478 /* The server detected a resend of the RPC call and
479 * returned NFS4ERR_DELAY as per Section 2.10.6.2
482 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
484 res->sr_slot - res->sr_session->fc_slot_table.slots,
485 res->sr_slot->seq_nr);
488 /* Just update the slot sequence no. */
489 ++res->sr_slot->seq_nr;
492 /* The session may be reset by one of the error handlers. */
493 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
494 nfs41_sequence_free_slot(res);
497 if (!rpc_restart_call(task))
499 rpc_delay(task, NFS4_POLL_RETRY_MAX);
503 static int nfs4_sequence_done(struct rpc_task *task,
504 struct nfs4_sequence_res *res)
506 if (res->sr_session == NULL)
508 return nfs41_sequence_done(task, res);
512 * nfs4_find_slot - efficiently look for a free slot
514 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
515 * If found, we mark the slot as used, update the highest_used_slotid,
516 * and respectively set up the sequence operation args.
517 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
519 * Note: must be called with under the slot_tbl_lock.
522 nfs4_find_slot(struct nfs4_slot_table *tbl)
525 u32 ret_id = NFS4_NO_SLOT;
527 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
528 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
530 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
531 if (slotid >= tbl->max_slots)
533 __set_bit(slotid, tbl->used_slots);
534 if (slotid > tbl->highest_used_slotid ||
535 tbl->highest_used_slotid == NFS4_NO_SLOT)
536 tbl->highest_used_slotid = slotid;
539 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
540 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
544 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
545 struct nfs4_sequence_res *res, int cache_reply)
547 args->sa_session = NULL;
548 args->sa_cache_this = 0;
550 args->sa_cache_this = 1;
551 res->sr_session = NULL;
555 int nfs41_setup_sequence(struct nfs4_session *session,
556 struct nfs4_sequence_args *args,
557 struct nfs4_sequence_res *res,
558 struct rpc_task *task)
560 struct nfs4_slot *slot;
561 struct nfs4_slot_table *tbl;
564 dprintk("--> %s\n", __func__);
565 /* slot already allocated? */
566 if (res->sr_slot != NULL)
569 tbl = &session->fc_slot_table;
571 spin_lock(&tbl->slot_tbl_lock);
572 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
573 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
574 /* The state manager will wait until the slot table is empty */
575 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
576 spin_unlock(&tbl->slot_tbl_lock);
577 dprintk("%s session is draining\n", __func__);
581 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
582 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
583 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
584 spin_unlock(&tbl->slot_tbl_lock);
585 dprintk("%s enforce FIFO order\n", __func__);
589 slotid = nfs4_find_slot(tbl);
590 if (slotid == NFS4_NO_SLOT) {
591 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
592 spin_unlock(&tbl->slot_tbl_lock);
593 dprintk("<-- %s: no free slots\n", __func__);
596 spin_unlock(&tbl->slot_tbl_lock);
598 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
599 slot = tbl->slots + slotid;
600 args->sa_session = session;
601 args->sa_slotid = slotid;
603 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
605 res->sr_session = session;
607 res->sr_renewal_time = jiffies;
608 res->sr_status_flags = 0;
610 * sr_status is only set in decode_sequence, and so will remain
611 * set to 1 if an rpc level failure occurs.
616 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
618 int nfs4_setup_sequence(const struct nfs_server *server,
619 struct nfs4_sequence_args *args,
620 struct nfs4_sequence_res *res,
621 struct rpc_task *task)
623 struct nfs4_session *session = nfs4_get_session(server);
629 dprintk("--> %s clp %p session %p sr_slot %td\n",
630 __func__, session->clp, session, res->sr_slot ?
631 res->sr_slot - session->fc_slot_table.slots : -1);
633 ret = nfs41_setup_sequence(session, args, res, task);
635 dprintk("<-- %s status=%d\n", __func__, ret);
639 struct nfs41_call_sync_data {
640 const struct nfs_server *seq_server;
641 struct nfs4_sequence_args *seq_args;
642 struct nfs4_sequence_res *seq_res;
645 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
647 struct nfs41_call_sync_data *data = calldata;
649 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
651 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
652 data->seq_res, task))
654 rpc_call_start(task);
657 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
659 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
660 nfs41_call_sync_prepare(task, calldata);
663 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
665 struct nfs41_call_sync_data *data = calldata;
667 nfs41_sequence_done(task, data->seq_res);
670 struct rpc_call_ops nfs41_call_sync_ops = {
671 .rpc_call_prepare = nfs41_call_sync_prepare,
672 .rpc_call_done = nfs41_call_sync_done,
675 struct rpc_call_ops nfs41_call_priv_sync_ops = {
676 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
677 .rpc_call_done = nfs41_call_sync_done,
680 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
681 struct nfs_server *server,
682 struct rpc_message *msg,
683 struct nfs4_sequence_args *args,
684 struct nfs4_sequence_res *res,
688 struct rpc_task *task;
689 struct nfs41_call_sync_data data = {
690 .seq_server = server,
694 struct rpc_task_setup task_setup = {
697 .callback_ops = &nfs41_call_sync_ops,
698 .callback_data = &data
702 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
703 task = rpc_run_task(&task_setup);
707 ret = task->tk_status;
713 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
714 struct nfs_server *server,
715 struct rpc_message *msg,
716 struct nfs4_sequence_args *args,
717 struct nfs4_sequence_res *res,
720 nfs41_init_sequence(args, res, cache_reply);
721 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
726 void nfs41_init_sequence(struct nfs4_sequence_args *args,
727 struct nfs4_sequence_res *res, int cache_reply)
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 nfs41_init_sequence(args, res, cache_reply);
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 nfs4_string owner_name;
780 struct nfs4_string group_name;
781 struct nfs_fattr f_attr;
782 struct nfs_fattr dir_attr;
784 struct dentry *dentry;
785 struct nfs4_state_owner *owner;
786 struct nfs4_state *state;
788 unsigned long timestamp;
789 unsigned int rpc_done : 1;
795 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
797 p->o_res.f_attr = &p->f_attr;
798 p->o_res.dir_attr = &p->dir_attr;
799 p->o_res.seqid = p->o_arg.seqid;
800 p->c_res.seqid = p->c_arg.seqid;
801 p->o_res.server = p->o_arg.server;
802 nfs_fattr_init(&p->f_attr);
803 nfs_fattr_init(&p->dir_attr);
804 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
807 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
808 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
809 const struct iattr *attrs,
812 struct dentry *parent = dget_parent(dentry);
813 struct inode *dir = parent->d_inode;
814 struct nfs_server *server = NFS_SERVER(dir);
815 struct nfs4_opendata *p;
817 p = kzalloc(sizeof(*p), gfp_mask);
820 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
821 if (p->o_arg.seqid == NULL)
823 nfs_sb_active(dentry->d_sb);
824 p->dentry = dget(dentry);
827 atomic_inc(&sp->so_count);
828 p->o_arg.fh = NFS_FH(dir);
829 p->o_arg.open_flags = flags;
830 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
831 p->o_arg.clientid = server->nfs_client->cl_clientid;
832 p->o_arg.id = sp->so_seqid.owner_id;
833 p->o_arg.name = &dentry->d_name;
834 p->o_arg.server = server;
835 p->o_arg.bitmask = server->attr_bitmask;
836 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
837 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
838 if (attrs != NULL && attrs->ia_valid != 0) {
841 p->o_arg.u.attrs = &p->attrs;
842 memcpy(&p->attrs, attrs, sizeof(p->attrs));
843 s = (u32 *) p->o_arg.u.verifier.data;
847 p->c_arg.fh = &p->o_res.fh;
848 p->c_arg.stateid = &p->o_res.stateid;
849 p->c_arg.seqid = p->o_arg.seqid;
850 nfs4_init_opendata_res(p);
860 static void nfs4_opendata_free(struct kref *kref)
862 struct nfs4_opendata *p = container_of(kref,
863 struct nfs4_opendata, kref);
864 struct super_block *sb = p->dentry->d_sb;
866 nfs_free_seqid(p->o_arg.seqid);
867 if (p->state != NULL)
868 nfs4_put_open_state(p->state);
869 nfs4_put_state_owner(p->owner);
873 nfs_fattr_free_names(&p->f_attr);
877 static void nfs4_opendata_put(struct nfs4_opendata *p)
880 kref_put(&p->kref, nfs4_opendata_free);
883 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
887 ret = rpc_wait_for_completion_task(task);
891 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
895 if (open_mode & (O_EXCL|O_TRUNC))
897 switch (mode & (FMODE_READ|FMODE_WRITE)) {
899 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
900 && state->n_rdonly != 0;
903 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
904 && state->n_wronly != 0;
906 case FMODE_READ|FMODE_WRITE:
907 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
908 && state->n_rdwr != 0;
914 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
916 if (delegation == NULL)
918 if ((delegation->type & fmode) != fmode)
920 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
922 nfs_mark_delegation_referenced(delegation);
926 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
935 case FMODE_READ|FMODE_WRITE:
938 nfs4_state_set_mode_locked(state, state->state | fmode);
941 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
943 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
944 nfs4_stateid_copy(&state->stateid, stateid);
945 nfs4_stateid_copy(&state->open_stateid, stateid);
948 set_bit(NFS_O_RDONLY_STATE, &state->flags);
951 set_bit(NFS_O_WRONLY_STATE, &state->flags);
953 case FMODE_READ|FMODE_WRITE:
954 set_bit(NFS_O_RDWR_STATE, &state->flags);
958 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
960 write_seqlock(&state->seqlock);
961 nfs_set_open_stateid_locked(state, stateid, fmode);
962 write_sequnlock(&state->seqlock);
965 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
968 * Protect the call to nfs4_state_set_mode_locked and
969 * serialise the stateid update
971 write_seqlock(&state->seqlock);
972 if (deleg_stateid != NULL) {
973 nfs4_stateid_copy(&state->stateid, deleg_stateid);
974 set_bit(NFS_DELEGATED_STATE, &state->flags);
976 if (open_stateid != NULL)
977 nfs_set_open_stateid_locked(state, open_stateid, fmode);
978 write_sequnlock(&state->seqlock);
979 spin_lock(&state->owner->so_lock);
980 update_open_stateflags(state, fmode);
981 spin_unlock(&state->owner->so_lock);
984 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
986 struct nfs_inode *nfsi = NFS_I(state->inode);
987 struct nfs_delegation *deleg_cur;
990 fmode &= (FMODE_READ|FMODE_WRITE);
993 deleg_cur = rcu_dereference(nfsi->delegation);
994 if (deleg_cur == NULL)
997 spin_lock(&deleg_cur->lock);
998 if (nfsi->delegation != deleg_cur ||
999 (deleg_cur->type & fmode) != fmode)
1000 goto no_delegation_unlock;
1002 if (delegation == NULL)
1003 delegation = &deleg_cur->stateid;
1004 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1005 goto no_delegation_unlock;
1007 nfs_mark_delegation_referenced(deleg_cur);
1008 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1010 no_delegation_unlock:
1011 spin_unlock(&deleg_cur->lock);
1015 if (!ret && open_stateid != NULL) {
1016 __update_open_stateid(state, open_stateid, NULL, fmode);
1024 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1026 struct nfs_delegation *delegation;
1029 delegation = rcu_dereference(NFS_I(inode)->delegation);
1030 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1035 nfs_inode_return_delegation(inode);
1038 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1040 struct nfs4_state *state = opendata->state;
1041 struct nfs_inode *nfsi = NFS_I(state->inode);
1042 struct nfs_delegation *delegation;
1043 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1044 fmode_t fmode = opendata->o_arg.fmode;
1045 nfs4_stateid stateid;
1049 if (can_open_cached(state, fmode, open_mode)) {
1050 spin_lock(&state->owner->so_lock);
1051 if (can_open_cached(state, fmode, open_mode)) {
1052 update_open_stateflags(state, fmode);
1053 spin_unlock(&state->owner->so_lock);
1054 goto out_return_state;
1056 spin_unlock(&state->owner->so_lock);
1059 delegation = rcu_dereference(nfsi->delegation);
1060 if (!can_open_delegated(delegation, fmode)) {
1064 /* Save the delegation */
1065 nfs4_stateid_copy(&stateid, &delegation->stateid);
1067 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1072 /* Try to update the stateid using the delegation */
1073 if (update_open_stateid(state, NULL, &stateid, fmode))
1074 goto out_return_state;
1077 return ERR_PTR(ret);
1079 atomic_inc(&state->count);
1083 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1085 struct inode *inode;
1086 struct nfs4_state *state = NULL;
1087 struct nfs_delegation *delegation;
1090 if (!data->rpc_done) {
1091 state = nfs4_try_open_cached(data);
1096 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1098 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1099 ret = PTR_ERR(inode);
1103 state = nfs4_get_open_state(inode, data->owner);
1106 if (data->o_res.delegation_type != 0) {
1107 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1108 int delegation_flags = 0;
1111 delegation = rcu_dereference(NFS_I(inode)->delegation);
1113 delegation_flags = delegation->flags;
1115 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1116 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1117 "returning a delegation for "
1118 "OPEN(CLAIM_DELEGATE_CUR)\n",
1120 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1121 nfs_inode_set_delegation(state->inode,
1122 data->owner->so_cred,
1125 nfs_inode_reclaim_delegation(state->inode,
1126 data->owner->so_cred,
1130 update_open_stateid(state, &data->o_res.stateid, NULL,
1138 return ERR_PTR(ret);
1141 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1143 struct nfs_inode *nfsi = NFS_I(state->inode);
1144 struct nfs_open_context *ctx;
1146 spin_lock(&state->inode->i_lock);
1147 list_for_each_entry(ctx, &nfsi->open_files, list) {
1148 if (ctx->state != state)
1150 get_nfs_open_context(ctx);
1151 spin_unlock(&state->inode->i_lock);
1154 spin_unlock(&state->inode->i_lock);
1155 return ERR_PTR(-ENOENT);
1158 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1160 struct nfs4_opendata *opendata;
1162 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1163 if (opendata == NULL)
1164 return ERR_PTR(-ENOMEM);
1165 opendata->state = state;
1166 atomic_inc(&state->count);
1170 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1172 struct nfs4_state *newstate;
1175 opendata->o_arg.open_flags = 0;
1176 opendata->o_arg.fmode = fmode;
1177 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1178 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1179 nfs4_init_opendata_res(opendata);
1180 ret = _nfs4_recover_proc_open(opendata);
1183 newstate = nfs4_opendata_to_nfs4_state(opendata);
1184 if (IS_ERR(newstate))
1185 return PTR_ERR(newstate);
1186 nfs4_close_state(newstate, fmode);
1191 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1193 struct nfs4_state *newstate;
1196 /* memory barrier prior to reading state->n_* */
1197 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1199 if (state->n_rdwr != 0) {
1200 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1201 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1204 if (newstate != state)
1207 if (state->n_wronly != 0) {
1208 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1209 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1212 if (newstate != state)
1215 if (state->n_rdonly != 0) {
1216 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1217 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1220 if (newstate != state)
1224 * We may have performed cached opens for all three recoveries.
1225 * Check if we need to update the current stateid.
1227 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1228 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1229 write_seqlock(&state->seqlock);
1230 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1231 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1232 write_sequnlock(&state->seqlock);
1239 * reclaim state on the server after a reboot.
1241 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1243 struct nfs_delegation *delegation;
1244 struct nfs4_opendata *opendata;
1245 fmode_t delegation_type = 0;
1248 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1249 if (IS_ERR(opendata))
1250 return PTR_ERR(opendata);
1251 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1252 opendata->o_arg.fh = NFS_FH(state->inode);
1254 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1255 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1256 delegation_type = delegation->type;
1258 opendata->o_arg.u.delegation_type = delegation_type;
1259 status = nfs4_open_recover(opendata, state);
1260 nfs4_opendata_put(opendata);
1264 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1266 struct nfs_server *server = NFS_SERVER(state->inode);
1267 struct nfs4_exception exception = { };
1270 err = _nfs4_do_open_reclaim(ctx, state);
1271 if (err != -NFS4ERR_DELAY)
1273 nfs4_handle_exception(server, err, &exception);
1274 } while (exception.retry);
1278 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1280 struct nfs_open_context *ctx;
1283 ctx = nfs4_state_find_open_context(state);
1285 return PTR_ERR(ctx);
1286 ret = nfs4_do_open_reclaim(ctx, state);
1287 put_nfs_open_context(ctx);
1291 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1293 struct nfs4_opendata *opendata;
1296 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1297 if (IS_ERR(opendata))
1298 return PTR_ERR(opendata);
1299 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1300 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1301 ret = nfs4_open_recover(opendata, state);
1302 nfs4_opendata_put(opendata);
1306 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1308 struct nfs4_exception exception = { };
1309 struct nfs_server *server = NFS_SERVER(state->inode);
1312 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1318 case -NFS4ERR_BADSESSION:
1319 case -NFS4ERR_BADSLOT:
1320 case -NFS4ERR_BAD_HIGH_SLOT:
1321 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1322 case -NFS4ERR_DEADSESSION:
1323 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1325 case -NFS4ERR_STALE_CLIENTID:
1326 case -NFS4ERR_STALE_STATEID:
1327 case -NFS4ERR_EXPIRED:
1328 /* Don't recall a delegation if it was lost */
1329 nfs4_schedule_lease_recovery(server->nfs_client);
1333 * The show must go on: exit, but mark the
1334 * stateid as needing recovery.
1336 case -NFS4ERR_DELEG_REVOKED:
1337 case -NFS4ERR_ADMIN_REVOKED:
1338 case -NFS4ERR_BAD_STATEID:
1339 nfs_inode_find_state_and_recover(state->inode,
1341 nfs4_schedule_stateid_recovery(server, state);
1344 * User RPCSEC_GSS context has expired.
1345 * We cannot recover this stateid now, so
1346 * skip it and allow recovery thread to
1353 err = nfs4_handle_exception(server, err, &exception);
1354 } while (exception.retry);
1359 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1361 struct nfs4_opendata *data = calldata;
1363 data->rpc_status = task->tk_status;
1364 if (data->rpc_status == 0) {
1365 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1366 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1367 renew_lease(data->o_res.server, data->timestamp);
1372 static void nfs4_open_confirm_release(void *calldata)
1374 struct nfs4_opendata *data = calldata;
1375 struct nfs4_state *state = NULL;
1377 /* If this request hasn't been cancelled, do nothing */
1378 if (data->cancelled == 0)
1380 /* In case of error, no cleanup! */
1381 if (!data->rpc_done)
1383 state = nfs4_opendata_to_nfs4_state(data);
1385 nfs4_close_state(state, data->o_arg.fmode);
1387 nfs4_opendata_put(data);
1390 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1391 .rpc_call_done = nfs4_open_confirm_done,
1392 .rpc_release = nfs4_open_confirm_release,
1396 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1398 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1400 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1401 struct rpc_task *task;
1402 struct rpc_message msg = {
1403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1404 .rpc_argp = &data->c_arg,
1405 .rpc_resp = &data->c_res,
1406 .rpc_cred = data->owner->so_cred,
1408 struct rpc_task_setup task_setup_data = {
1409 .rpc_client = server->client,
1410 .rpc_message = &msg,
1411 .callback_ops = &nfs4_open_confirm_ops,
1412 .callback_data = data,
1413 .workqueue = nfsiod_workqueue,
1414 .flags = RPC_TASK_ASYNC,
1418 kref_get(&data->kref);
1420 data->rpc_status = 0;
1421 data->timestamp = jiffies;
1422 task = rpc_run_task(&task_setup_data);
1424 return PTR_ERR(task);
1425 status = nfs4_wait_for_completion_rpc_task(task);
1427 data->cancelled = 1;
1430 status = data->rpc_status;
1435 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1437 struct nfs4_opendata *data = calldata;
1438 struct nfs4_state_owner *sp = data->owner;
1440 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1443 * Check if we still need to send an OPEN call, or if we can use
1444 * a delegation instead.
1446 if (data->state != NULL) {
1447 struct nfs_delegation *delegation;
1449 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1452 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1453 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1454 can_open_delegated(delegation, data->o_arg.fmode))
1455 goto unlock_no_action;
1458 /* Update sequence id. */
1459 data->o_arg.id = sp->so_seqid.owner_id;
1460 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1461 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1462 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1463 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1465 data->timestamp = jiffies;
1466 if (nfs4_setup_sequence(data->o_arg.server,
1467 &data->o_arg.seq_args,
1468 &data->o_res.seq_res, task))
1470 rpc_call_start(task);
1475 task->tk_action = NULL;
1479 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1481 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1482 nfs4_open_prepare(task, calldata);
1485 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1487 struct nfs4_opendata *data = calldata;
1489 data->rpc_status = task->tk_status;
1491 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1494 if (task->tk_status == 0) {
1495 switch (data->o_res.f_attr->mode & S_IFMT) {
1499 data->rpc_status = -ELOOP;
1502 data->rpc_status = -EISDIR;
1505 data->rpc_status = -ENOTDIR;
1507 renew_lease(data->o_res.server, data->timestamp);
1508 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1509 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1514 static void nfs4_open_release(void *calldata)
1516 struct nfs4_opendata *data = calldata;
1517 struct nfs4_state *state = NULL;
1519 /* If this request hasn't been cancelled, do nothing */
1520 if (data->cancelled == 0)
1522 /* In case of error, no cleanup! */
1523 if (data->rpc_status != 0 || !data->rpc_done)
1525 /* In case we need an open_confirm, no cleanup! */
1526 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1528 state = nfs4_opendata_to_nfs4_state(data);
1530 nfs4_close_state(state, data->o_arg.fmode);
1532 nfs4_opendata_put(data);
1535 static const struct rpc_call_ops nfs4_open_ops = {
1536 .rpc_call_prepare = nfs4_open_prepare,
1537 .rpc_call_done = nfs4_open_done,
1538 .rpc_release = nfs4_open_release,
1541 static const struct rpc_call_ops nfs4_recover_open_ops = {
1542 .rpc_call_prepare = nfs4_recover_open_prepare,
1543 .rpc_call_done = nfs4_open_done,
1544 .rpc_release = nfs4_open_release,
1547 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1549 struct inode *dir = data->dir->d_inode;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs_openargs *o_arg = &data->o_arg;
1552 struct nfs_openres *o_res = &data->o_res;
1553 struct rpc_task *task;
1554 struct rpc_message msg = {
1555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1558 .rpc_cred = data->owner->so_cred,
1560 struct rpc_task_setup task_setup_data = {
1561 .rpc_client = server->client,
1562 .rpc_message = &msg,
1563 .callback_ops = &nfs4_open_ops,
1564 .callback_data = data,
1565 .workqueue = nfsiod_workqueue,
1566 .flags = RPC_TASK_ASYNC,
1570 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1571 kref_get(&data->kref);
1573 data->rpc_status = 0;
1574 data->cancelled = 0;
1576 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1577 task = rpc_run_task(&task_setup_data);
1579 return PTR_ERR(task);
1580 status = nfs4_wait_for_completion_rpc_task(task);
1582 data->cancelled = 1;
1585 status = data->rpc_status;
1591 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1593 struct inode *dir = data->dir->d_inode;
1594 struct nfs_openres *o_res = &data->o_res;
1597 status = nfs4_run_open_task(data, 1);
1598 if (status != 0 || !data->rpc_done)
1601 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1603 nfs_refresh_inode(dir, o_res->dir_attr);
1605 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1606 status = _nfs4_proc_open_confirm(data);
1615 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1617 static int _nfs4_proc_open(struct nfs4_opendata *data)
1619 struct inode *dir = data->dir->d_inode;
1620 struct nfs_server *server = NFS_SERVER(dir);
1621 struct nfs_openargs *o_arg = &data->o_arg;
1622 struct nfs_openres *o_res = &data->o_res;
1625 status = nfs4_run_open_task(data, 0);
1626 if (!data->rpc_done)
1629 if (status == -NFS4ERR_BADNAME &&
1630 !(o_arg->open_flags & O_CREAT))
1635 nfs_fattr_map_and_free_names(server, &data->f_attr);
1637 if (o_arg->open_flags & O_CREAT) {
1638 update_changeattr(dir, &o_res->cinfo);
1639 nfs_post_op_update_inode(dir, o_res->dir_attr);
1641 nfs_refresh_inode(dir, o_res->dir_attr);
1642 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1643 server->caps &= ~NFS_CAP_POSIX_LOCK;
1644 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1645 status = _nfs4_proc_open_confirm(data);
1649 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1650 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1654 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1659 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1660 ret = nfs4_wait_clnt_recover(clp);
1663 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1664 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1666 nfs4_schedule_state_manager(clp);
1672 static int nfs4_recover_expired_lease(struct nfs_server *server)
1674 return nfs4_client_recover_expired_lease(server->nfs_client);
1679 * reclaim state on the server after a network partition.
1680 * Assumes caller holds the appropriate lock
1682 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1684 struct nfs4_opendata *opendata;
1687 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1688 if (IS_ERR(opendata))
1689 return PTR_ERR(opendata);
1690 ret = nfs4_open_recover(opendata, state);
1692 d_drop(ctx->dentry);
1693 nfs4_opendata_put(opendata);
1697 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1699 struct nfs_server *server = NFS_SERVER(state->inode);
1700 struct nfs4_exception exception = { };
1704 err = _nfs4_open_expired(ctx, state);
1708 case -NFS4ERR_GRACE:
1709 case -NFS4ERR_DELAY:
1710 nfs4_handle_exception(server, err, &exception);
1713 } while (exception.retry);
1718 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1720 struct nfs_open_context *ctx;
1723 ctx = nfs4_state_find_open_context(state);
1725 return PTR_ERR(ctx);
1726 ret = nfs4_do_open_expired(ctx, state);
1727 put_nfs_open_context(ctx);
1731 #if defined(CONFIG_NFS_V4_1)
1732 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1734 int status = NFS_OK;
1735 struct nfs_server *server = NFS_SERVER(state->inode);
1737 if (state->flags & flags) {
1738 status = nfs41_test_stateid(server, stateid);
1739 if (status != NFS_OK) {
1740 nfs41_free_stateid(server, stateid);
1741 state->flags &= ~flags;
1747 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1749 int deleg_status, open_status;
1750 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1751 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1753 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1754 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1756 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1758 return nfs4_open_expired(sp, state);
1763 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1764 * fields corresponding to attributes that were used to store the verifier.
1765 * Make sure we clobber those fields in the later setattr call
1767 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1769 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1770 !(sattr->ia_valid & ATTR_ATIME_SET))
1771 sattr->ia_valid |= ATTR_ATIME;
1773 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1774 !(sattr->ia_valid & ATTR_MTIME_SET))
1775 sattr->ia_valid |= ATTR_MTIME;
1779 * Returns a referenced nfs4_state
1781 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)
1783 struct nfs4_state_owner *sp;
1784 struct nfs4_state *state = NULL;
1785 struct nfs_server *server = NFS_SERVER(dir);
1786 struct nfs4_opendata *opendata;
1789 /* Protect against reboot recovery conflicts */
1791 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1793 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1796 status = nfs4_recover_expired_lease(server);
1798 goto err_put_state_owner;
1799 if (dentry->d_inode != NULL)
1800 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1802 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1803 if (opendata == NULL)
1804 goto err_put_state_owner;
1806 if (dentry->d_inode != NULL)
1807 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1809 status = _nfs4_proc_open(opendata);
1811 goto err_opendata_put;
1813 state = nfs4_opendata_to_nfs4_state(opendata);
1814 status = PTR_ERR(state);
1816 goto err_opendata_put;
1817 if (server->caps & NFS_CAP_POSIX_LOCK)
1818 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1820 if (opendata->o_arg.open_flags & O_EXCL) {
1821 nfs4_exclusive_attrset(opendata, sattr);
1823 nfs_fattr_init(opendata->o_res.f_attr);
1824 status = nfs4_do_setattr(state->inode, cred,
1825 opendata->o_res.f_attr, sattr,
1828 nfs_setattr_update_inode(state->inode, sattr);
1829 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1831 nfs4_opendata_put(opendata);
1832 nfs4_put_state_owner(sp);
1836 nfs4_opendata_put(opendata);
1837 err_put_state_owner:
1838 nfs4_put_state_owner(sp);
1845 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)
1847 struct nfs4_exception exception = { };
1848 struct nfs4_state *res;
1852 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1855 /* NOTE: BAD_SEQID means the server and client disagree about the
1856 * book-keeping w.r.t. state-changing operations
1857 * (OPEN/CLOSE/LOCK/LOCKU...)
1858 * It is actually a sign of a bug on the client or on the server.
1860 * If we receive a BAD_SEQID error in the particular case of
1861 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1862 * have unhashed the old state_owner for us, and that we can
1863 * therefore safely retry using a new one. We should still warn
1864 * the user though...
1866 if (status == -NFS4ERR_BAD_SEQID) {
1867 printk(KERN_WARNING "NFS: v4 server %s "
1868 " returned a bad sequence-id error!\n",
1869 NFS_SERVER(dir)->nfs_client->cl_hostname);
1870 exception.retry = 1;
1874 * BAD_STATEID on OPEN means that the server cancelled our
1875 * state before it received the OPEN_CONFIRM.
1876 * Recover by retrying the request as per the discussion
1877 * on Page 181 of RFC3530.
1879 if (status == -NFS4ERR_BAD_STATEID) {
1880 exception.retry = 1;
1883 if (status == -EAGAIN) {
1884 /* We must have found a delegation */
1885 exception.retry = 1;
1888 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1889 status, &exception));
1890 } while (exception.retry);
1894 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1895 struct nfs_fattr *fattr, struct iattr *sattr,
1896 struct nfs4_state *state)
1898 struct nfs_server *server = NFS_SERVER(inode);
1899 struct nfs_setattrargs arg = {
1900 .fh = NFS_FH(inode),
1903 .bitmask = server->attr_bitmask,
1905 struct nfs_setattrres res = {
1909 struct rpc_message msg = {
1910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1915 unsigned long timestamp = jiffies;
1918 nfs_fattr_init(fattr);
1920 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1921 /* Use that stateid */
1922 } else if (state != NULL) {
1923 nfs4_select_rw_stateid(&arg.stateid, state, current->files, current->tgid);
1925 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1927 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1928 if (status == 0 && state != NULL)
1929 renew_lease(server, timestamp);
1933 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1934 struct nfs_fattr *fattr, struct iattr *sattr,
1935 struct nfs4_state *state)
1937 struct nfs_server *server = NFS_SERVER(inode);
1938 struct nfs4_exception exception = {
1943 err = nfs4_handle_exception(server,
1944 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1946 } while (exception.retry);
1950 struct nfs4_closedata {
1951 struct inode *inode;
1952 struct nfs4_state *state;
1953 struct nfs_closeargs arg;
1954 struct nfs_closeres res;
1955 struct nfs_fattr fattr;
1956 unsigned long timestamp;
1961 static void nfs4_free_closedata(void *data)
1963 struct nfs4_closedata *calldata = data;
1964 struct nfs4_state_owner *sp = calldata->state->owner;
1965 struct super_block *sb = calldata->state->inode->i_sb;
1968 pnfs_roc_release(calldata->state->inode);
1969 nfs4_put_open_state(calldata->state);
1970 nfs_free_seqid(calldata->arg.seqid);
1971 nfs4_put_state_owner(sp);
1972 nfs_sb_deactive(sb);
1976 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1979 spin_lock(&state->owner->so_lock);
1980 if (!(fmode & FMODE_READ))
1981 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1982 if (!(fmode & FMODE_WRITE))
1983 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1984 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1985 spin_unlock(&state->owner->so_lock);
1988 static void nfs4_close_done(struct rpc_task *task, void *data)
1990 struct nfs4_closedata *calldata = data;
1991 struct nfs4_state *state = calldata->state;
1992 struct nfs_server *server = NFS_SERVER(calldata->inode);
1994 dprintk("%s: begin!\n", __func__);
1995 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1997 /* hmm. we are done with the inode, and in the process of freeing
1998 * the state_owner. we keep this around to process errors
2000 switch (task->tk_status) {
2003 pnfs_roc_set_barrier(state->inode,
2004 calldata->roc_barrier);
2005 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2006 renew_lease(server, calldata->timestamp);
2007 nfs4_close_clear_stateid_flags(state,
2008 calldata->arg.fmode);
2010 case -NFS4ERR_STALE_STATEID:
2011 case -NFS4ERR_OLD_STATEID:
2012 case -NFS4ERR_BAD_STATEID:
2013 case -NFS4ERR_EXPIRED:
2014 if (calldata->arg.fmode == 0)
2017 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2018 rpc_restart_call_prepare(task);
2020 nfs_release_seqid(calldata->arg.seqid);
2021 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2022 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2025 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2027 struct nfs4_closedata *calldata = data;
2028 struct nfs4_state *state = calldata->state;
2031 dprintk("%s: begin!\n", __func__);
2032 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2035 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2036 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2037 spin_lock(&state->owner->so_lock);
2038 /* Calculate the change in open mode */
2039 if (state->n_rdwr == 0) {
2040 if (state->n_rdonly == 0) {
2041 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2042 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2043 calldata->arg.fmode &= ~FMODE_READ;
2045 if (state->n_wronly == 0) {
2046 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2047 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2048 calldata->arg.fmode &= ~FMODE_WRITE;
2051 spin_unlock(&state->owner->so_lock);
2054 /* Note: exit _without_ calling nfs4_close_done */
2055 task->tk_action = NULL;
2059 if (calldata->arg.fmode == 0) {
2060 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2061 if (calldata->roc &&
2062 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2063 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2069 nfs_fattr_init(calldata->res.fattr);
2070 calldata->timestamp = jiffies;
2071 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2072 &calldata->arg.seq_args,
2073 &calldata->res.seq_res,
2076 rpc_call_start(task);
2078 dprintk("%s: done!\n", __func__);
2081 static const struct rpc_call_ops nfs4_close_ops = {
2082 .rpc_call_prepare = nfs4_close_prepare,
2083 .rpc_call_done = nfs4_close_done,
2084 .rpc_release = nfs4_free_closedata,
2088 * It is possible for data to be read/written from a mem-mapped file
2089 * after the sys_close call (which hits the vfs layer as a flush).
2090 * This means that we can't safely call nfsv4 close on a file until
2091 * the inode is cleared. This in turn means that we are not good
2092 * NFSv4 citizens - we do not indicate to the server to update the file's
2093 * share state even when we are done with one of the three share
2094 * stateid's in the inode.
2096 * NOTE: Caller must be holding the sp->so_owner semaphore!
2098 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2100 struct nfs_server *server = NFS_SERVER(state->inode);
2101 struct nfs4_closedata *calldata;
2102 struct nfs4_state_owner *sp = state->owner;
2103 struct rpc_task *task;
2104 struct rpc_message msg = {
2105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2106 .rpc_cred = state->owner->so_cred,
2108 struct rpc_task_setup task_setup_data = {
2109 .rpc_client = server->client,
2110 .rpc_message = &msg,
2111 .callback_ops = &nfs4_close_ops,
2112 .workqueue = nfsiod_workqueue,
2113 .flags = RPC_TASK_ASYNC,
2115 int status = -ENOMEM;
2117 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2118 if (calldata == NULL)
2120 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2121 calldata->inode = state->inode;
2122 calldata->state = state;
2123 calldata->arg.fh = NFS_FH(state->inode);
2124 calldata->arg.stateid = &state->open_stateid;
2125 /* Serialization for the sequence id */
2126 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2127 if (calldata->arg.seqid == NULL)
2128 goto out_free_calldata;
2129 calldata->arg.fmode = 0;
2130 calldata->arg.bitmask = server->cache_consistency_bitmask;
2131 calldata->res.fattr = &calldata->fattr;
2132 calldata->res.seqid = calldata->arg.seqid;
2133 calldata->res.server = server;
2134 calldata->roc = roc;
2135 nfs_sb_active(calldata->inode->i_sb);
2137 msg.rpc_argp = &calldata->arg;
2138 msg.rpc_resp = &calldata->res;
2139 task_setup_data.callback_data = calldata;
2140 task = rpc_run_task(&task_setup_data);
2142 return PTR_ERR(task);
2145 status = rpc_wait_for_completion_task(task);
2152 pnfs_roc_release(state->inode);
2153 nfs4_put_open_state(state);
2154 nfs4_put_state_owner(sp);
2158 static struct inode *
2159 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2161 struct nfs4_state *state;
2163 /* Protect against concurrent sillydeletes */
2164 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2166 return ERR_CAST(state);
2168 return igrab(state->inode);
2171 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2173 if (ctx->state == NULL)
2176 nfs4_close_sync(ctx->state, ctx->mode);
2178 nfs4_close_state(ctx->state, ctx->mode);
2181 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2183 struct nfs4_server_caps_arg args = {
2186 struct nfs4_server_caps_res res = {};
2187 struct rpc_message msg = {
2188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2194 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2196 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2197 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2198 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2199 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2200 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2201 NFS_CAP_CTIME|NFS_CAP_MTIME);
2202 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2203 server->caps |= NFS_CAP_ACLS;
2204 if (res.has_links != 0)
2205 server->caps |= NFS_CAP_HARDLINKS;
2206 if (res.has_symlinks != 0)
2207 server->caps |= NFS_CAP_SYMLINKS;
2208 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2209 server->caps |= NFS_CAP_FILEID;
2210 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2211 server->caps |= NFS_CAP_MODE;
2212 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2213 server->caps |= NFS_CAP_NLINK;
2214 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2215 server->caps |= NFS_CAP_OWNER;
2216 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2217 server->caps |= NFS_CAP_OWNER_GROUP;
2218 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2219 server->caps |= NFS_CAP_ATIME;
2220 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2221 server->caps |= NFS_CAP_CTIME;
2222 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2223 server->caps |= NFS_CAP_MTIME;
2225 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2226 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2227 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2228 server->acl_bitmask = res.acl_bitmask;
2229 server->fh_expire_type = res.fh_expire_type;
2235 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2237 struct nfs4_exception exception = { };
2240 err = nfs4_handle_exception(server,
2241 _nfs4_server_capabilities(server, fhandle),
2243 } while (exception.retry);
2247 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2248 struct nfs_fsinfo *info)
2250 struct nfs4_lookup_root_arg args = {
2251 .bitmask = nfs4_fattr_bitmap,
2253 struct nfs4_lookup_res res = {
2255 .fattr = info->fattr,
2258 struct rpc_message msg = {
2259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2264 nfs_fattr_init(info->fattr);
2265 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2268 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2269 struct nfs_fsinfo *info)
2271 struct nfs4_exception exception = { };
2274 err = _nfs4_lookup_root(server, fhandle, info);
2277 case -NFS4ERR_WRONGSEC:
2280 err = nfs4_handle_exception(server, err, &exception);
2282 } while (exception.retry);
2286 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2287 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2289 struct rpc_auth *auth;
2292 auth = rpcauth_create(flavor, server->client);
2297 ret = nfs4_lookup_root(server, fhandle, info);
2302 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2303 struct nfs_fsinfo *info)
2305 int i, len, status = 0;
2306 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2308 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2309 flav_array[len] = RPC_AUTH_NULL;
2312 for (i = 0; i < len; i++) {
2313 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2314 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2319 * -EACCESS could mean that the user doesn't have correct permissions
2320 * to access the mount. It could also mean that we tried to mount
2321 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2322 * existing mount programs don't handle -EACCES very well so it should
2323 * be mapped to -EPERM instead.
2325 if (status == -EACCES)
2331 * get the file handle for the "/" directory on the server
2333 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2334 struct nfs_fsinfo *info)
2336 int minor_version = server->nfs_client->cl_minorversion;
2337 int status = nfs4_lookup_root(server, fhandle, info);
2338 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2340 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2341 * by nfs4_map_errors() as this function exits.
2343 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2345 status = nfs4_server_capabilities(server, fhandle);
2347 status = nfs4_do_fsinfo(server, fhandle, info);
2348 return nfs4_map_errors(status);
2352 * Get locations and (maybe) other attributes of a referral.
2353 * Note that we'll actually follow the referral later when
2354 * we detect fsid mismatch in inode revalidation
2356 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2357 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2359 int status = -ENOMEM;
2360 struct page *page = NULL;
2361 struct nfs4_fs_locations *locations = NULL;
2363 page = alloc_page(GFP_KERNEL);
2366 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2367 if (locations == NULL)
2370 status = nfs4_proc_fs_locations(dir, name, locations, page);
2373 /* Make sure server returned a different fsid for the referral */
2374 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2375 dprintk("%s: server did not return a different fsid for"
2376 " a referral at %s\n", __func__, name->name);
2380 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2381 nfs_fixup_referral_attributes(&locations->fattr);
2383 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2384 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2385 memset(fhandle, 0, sizeof(struct nfs_fh));
2393 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2395 struct nfs4_getattr_arg args = {
2397 .bitmask = server->attr_bitmask,
2399 struct nfs4_getattr_res res = {
2403 struct rpc_message msg = {
2404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2409 nfs_fattr_init(fattr);
2410 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2413 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2415 struct nfs4_exception exception = { };
2418 err = nfs4_handle_exception(server,
2419 _nfs4_proc_getattr(server, fhandle, fattr),
2421 } while (exception.retry);
2426 * The file is not closed if it is opened due to the a request to change
2427 * the size of the file. The open call will not be needed once the
2428 * VFS layer lookup-intents are implemented.
2430 * Close is called when the inode is destroyed.
2431 * If we haven't opened the file for O_WRONLY, we
2432 * need to in the size_change case to obtain a stateid.
2435 * Because OPEN is always done by name in nfsv4, it is
2436 * possible that we opened a different file by the same
2437 * name. We can recognize this race condition, but we
2438 * can't do anything about it besides returning an error.
2440 * This will be fixed with VFS changes (lookup-intent).
2443 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2444 struct iattr *sattr)
2446 struct inode *inode = dentry->d_inode;
2447 struct rpc_cred *cred = NULL;
2448 struct nfs4_state *state = NULL;
2451 if (pnfs_ld_layoutret_on_setattr(inode))
2452 pnfs_return_layout(inode);
2454 nfs_fattr_init(fattr);
2456 /* Search for an existing open(O_WRITE) file */
2457 if (sattr->ia_valid & ATTR_FILE) {
2458 struct nfs_open_context *ctx;
2460 ctx = nfs_file_open_context(sattr->ia_file);
2467 /* Deal with open(O_TRUNC) */
2468 if (sattr->ia_valid & ATTR_OPEN)
2469 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2471 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2473 nfs_setattr_update_inode(inode, sattr);
2477 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2478 const struct qstr *name, struct nfs_fh *fhandle,
2479 struct nfs_fattr *fattr)
2481 struct nfs_server *server = NFS_SERVER(dir);
2483 struct nfs4_lookup_arg args = {
2484 .bitmask = server->attr_bitmask,
2485 .dir_fh = NFS_FH(dir),
2488 struct nfs4_lookup_res res = {
2493 struct rpc_message msg = {
2494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2499 nfs_fattr_init(fattr);
2501 dprintk("NFS call lookup %s\n", name->name);
2502 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2503 dprintk("NFS reply lookup: %d\n", status);
2507 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2509 memset(fh, 0, sizeof(struct nfs_fh));
2510 fattr->fsid.major = 1;
2511 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2512 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2513 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2517 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2518 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2520 struct nfs4_exception exception = { };
2525 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2527 case -NFS4ERR_BADNAME:
2529 case -NFS4ERR_MOVED:
2530 return nfs4_get_referral(dir, name, fattr, fhandle);
2531 case -NFS4ERR_WRONGSEC:
2532 nfs_fixup_secinfo_attributes(fattr, fhandle);
2534 err = nfs4_handle_exception(NFS_SERVER(dir),
2535 status, &exception);
2536 } while (exception.retry);
2540 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2542 struct nfs_server *server = NFS_SERVER(inode);
2543 struct nfs4_accessargs args = {
2544 .fh = NFS_FH(inode),
2545 .bitmask = server->cache_consistency_bitmask,
2547 struct nfs4_accessres res = {
2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2554 .rpc_cred = entry->cred,
2556 int mode = entry->mask;
2560 * Determine which access bits we want to ask for...
2562 if (mode & MAY_READ)
2563 args.access |= NFS4_ACCESS_READ;
2564 if (S_ISDIR(inode->i_mode)) {
2565 if (mode & MAY_WRITE)
2566 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2567 if (mode & MAY_EXEC)
2568 args.access |= NFS4_ACCESS_LOOKUP;
2570 if (mode & MAY_WRITE)
2571 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2572 if (mode & MAY_EXEC)
2573 args.access |= NFS4_ACCESS_EXECUTE;
2576 res.fattr = nfs_alloc_fattr();
2577 if (res.fattr == NULL)
2580 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2583 if (res.access & NFS4_ACCESS_READ)
2584 entry->mask |= MAY_READ;
2585 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2586 entry->mask |= MAY_WRITE;
2587 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2588 entry->mask |= MAY_EXEC;
2589 nfs_refresh_inode(inode, res.fattr);
2591 nfs_free_fattr(res.fattr);
2595 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2597 struct nfs4_exception exception = { };
2600 err = nfs4_handle_exception(NFS_SERVER(inode),
2601 _nfs4_proc_access(inode, entry),
2603 } while (exception.retry);
2608 * TODO: For the time being, we don't try to get any attributes
2609 * along with any of the zero-copy operations READ, READDIR,
2612 * In the case of the first three, we want to put the GETATTR
2613 * after the read-type operation -- this is because it is hard
2614 * to predict the length of a GETATTR response in v4, and thus
2615 * align the READ data correctly. This means that the GETATTR
2616 * may end up partially falling into the page cache, and we should
2617 * shift it into the 'tail' of the xdr_buf before processing.
2618 * To do this efficiently, we need to know the total length
2619 * of data received, which doesn't seem to be available outside
2622 * In the case of WRITE, we also want to put the GETATTR after
2623 * the operation -- in this case because we want to make sure
2624 * we get the post-operation mtime and size. This means that
2625 * we can't use xdr_encode_pages() as written: we need a variant
2626 * of it which would leave room in the 'tail' iovec.
2628 * Both of these changes to the XDR layer would in fact be quite
2629 * minor, but I decided to leave them for a subsequent patch.
2631 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2632 unsigned int pgbase, unsigned int pglen)
2634 struct nfs4_readlink args = {
2635 .fh = NFS_FH(inode),
2640 struct nfs4_readlink_res res;
2641 struct rpc_message msg = {
2642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2647 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2650 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2651 unsigned int pgbase, unsigned int pglen)
2653 struct nfs4_exception exception = { };
2656 err = nfs4_handle_exception(NFS_SERVER(inode),
2657 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2659 } while (exception.retry);
2665 * We will need to arrange for the VFS layer to provide an atomic open.
2666 * Until then, this create/open method is prone to inefficiency and race
2667 * conditions due to the lookup, create, and open VFS calls from sys_open()
2668 * placed on the wire.
2670 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2671 * The file will be opened again in the subsequent VFS open call
2672 * (nfs4_proc_file_open).
2674 * The open for read will just hang around to be used by any process that
2675 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2679 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2680 int flags, struct nfs_open_context *ctx)
2682 struct dentry *de = dentry;
2683 struct nfs4_state *state;
2684 struct rpc_cred *cred = NULL;
2693 sattr->ia_mode &= ~current_umask();
2694 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2696 if (IS_ERR(state)) {
2697 status = PTR_ERR(state);
2700 d_add(dentry, igrab(state->inode));
2701 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2705 nfs4_close_sync(state, fmode);
2710 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2712 struct nfs_server *server = NFS_SERVER(dir);
2713 struct nfs_removeargs args = {
2715 .name.len = name->len,
2716 .name.name = name->name,
2717 .bitmask = server->attr_bitmask,
2719 struct nfs_removeres res = {
2722 struct rpc_message msg = {
2723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2727 int status = -ENOMEM;
2729 res.dir_attr = nfs_alloc_fattr();
2730 if (res.dir_attr == NULL)
2733 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2735 update_changeattr(dir, &res.cinfo);
2736 nfs_post_op_update_inode(dir, res.dir_attr);
2738 nfs_free_fattr(res.dir_attr);
2743 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2745 struct nfs4_exception exception = { };
2748 err = nfs4_handle_exception(NFS_SERVER(dir),
2749 _nfs4_proc_remove(dir, name),
2751 } while (exception.retry);
2755 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2757 struct nfs_server *server = NFS_SERVER(dir);
2758 struct nfs_removeargs *args = msg->rpc_argp;
2759 struct nfs_removeres *res = msg->rpc_resp;
2761 args->bitmask = server->cache_consistency_bitmask;
2762 res->server = server;
2763 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2764 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2767 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2769 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2771 if (!nfs4_sequence_done(task, &res->seq_res))
2773 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2775 update_changeattr(dir, &res->cinfo);
2776 nfs_post_op_update_inode(dir, res->dir_attr);
2780 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2782 struct nfs_server *server = NFS_SERVER(dir);
2783 struct nfs_renameargs *arg = msg->rpc_argp;
2784 struct nfs_renameres *res = msg->rpc_resp;
2786 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2787 arg->bitmask = server->attr_bitmask;
2788 res->server = server;
2789 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2792 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2793 struct inode *new_dir)
2795 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2797 if (!nfs4_sequence_done(task, &res->seq_res))
2799 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2802 update_changeattr(old_dir, &res->old_cinfo);
2803 nfs_post_op_update_inode(old_dir, res->old_fattr);
2804 update_changeattr(new_dir, &res->new_cinfo);
2805 nfs_post_op_update_inode(new_dir, res->new_fattr);
2809 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2810 struct inode *new_dir, struct qstr *new_name)
2812 struct nfs_server *server = NFS_SERVER(old_dir);
2813 struct nfs_renameargs arg = {
2814 .old_dir = NFS_FH(old_dir),
2815 .new_dir = NFS_FH(new_dir),
2816 .old_name = old_name,
2817 .new_name = new_name,
2818 .bitmask = server->attr_bitmask,
2820 struct nfs_renameres res = {
2823 struct rpc_message msg = {
2824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2828 int status = -ENOMEM;
2830 res.old_fattr = nfs_alloc_fattr();
2831 res.new_fattr = nfs_alloc_fattr();
2832 if (res.old_fattr == NULL || res.new_fattr == NULL)
2835 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2837 update_changeattr(old_dir, &res.old_cinfo);
2838 nfs_post_op_update_inode(old_dir, res.old_fattr);
2839 update_changeattr(new_dir, &res.new_cinfo);
2840 nfs_post_op_update_inode(new_dir, res.new_fattr);
2843 nfs_free_fattr(res.new_fattr);
2844 nfs_free_fattr(res.old_fattr);
2848 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2849 struct inode *new_dir, struct qstr *new_name)
2851 struct nfs4_exception exception = { };
2854 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2855 _nfs4_proc_rename(old_dir, old_name,
2858 } while (exception.retry);
2862 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2864 struct nfs_server *server = NFS_SERVER(inode);
2865 struct nfs4_link_arg arg = {
2866 .fh = NFS_FH(inode),
2867 .dir_fh = NFS_FH(dir),
2869 .bitmask = server->attr_bitmask,
2871 struct nfs4_link_res res = {
2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2879 int status = -ENOMEM;
2881 res.fattr = nfs_alloc_fattr();
2882 res.dir_attr = nfs_alloc_fattr();
2883 if (res.fattr == NULL || res.dir_attr == NULL)
2886 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2888 update_changeattr(dir, &res.cinfo);
2889 nfs_post_op_update_inode(dir, res.dir_attr);
2890 nfs_post_op_update_inode(inode, res.fattr);
2893 nfs_free_fattr(res.dir_attr);
2894 nfs_free_fattr(res.fattr);
2898 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2900 struct nfs4_exception exception = { };
2903 err = nfs4_handle_exception(NFS_SERVER(inode),
2904 _nfs4_proc_link(inode, dir, name),
2906 } while (exception.retry);
2910 struct nfs4_createdata {
2911 struct rpc_message msg;
2912 struct nfs4_create_arg arg;
2913 struct nfs4_create_res res;
2915 struct nfs_fattr fattr;
2916 struct nfs_fattr dir_fattr;
2919 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2920 struct qstr *name, struct iattr *sattr, u32 ftype)
2922 struct nfs4_createdata *data;
2924 data = kzalloc(sizeof(*data), GFP_KERNEL);
2926 struct nfs_server *server = NFS_SERVER(dir);
2928 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2929 data->msg.rpc_argp = &data->arg;
2930 data->msg.rpc_resp = &data->res;
2931 data->arg.dir_fh = NFS_FH(dir);
2932 data->arg.server = server;
2933 data->arg.name = name;
2934 data->arg.attrs = sattr;
2935 data->arg.ftype = ftype;
2936 data->arg.bitmask = server->attr_bitmask;
2937 data->res.server = server;
2938 data->res.fh = &data->fh;
2939 data->res.fattr = &data->fattr;
2940 data->res.dir_fattr = &data->dir_fattr;
2941 nfs_fattr_init(data->res.fattr);
2942 nfs_fattr_init(data->res.dir_fattr);
2947 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2949 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2950 &data->arg.seq_args, &data->res.seq_res, 1);
2952 update_changeattr(dir, &data->res.dir_cinfo);
2953 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2954 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2959 static void nfs4_free_createdata(struct nfs4_createdata *data)
2964 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2965 struct page *page, unsigned int len, struct iattr *sattr)
2967 struct nfs4_createdata *data;
2968 int status = -ENAMETOOLONG;
2970 if (len > NFS4_MAXPATHLEN)
2974 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2978 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2979 data->arg.u.symlink.pages = &page;
2980 data->arg.u.symlink.len = len;
2982 status = nfs4_do_create(dir, dentry, data);
2984 nfs4_free_createdata(data);
2989 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2990 struct page *page, unsigned int len, struct iattr *sattr)
2992 struct nfs4_exception exception = { };
2995 err = nfs4_handle_exception(NFS_SERVER(dir),
2996 _nfs4_proc_symlink(dir, dentry, page,
2999 } while (exception.retry);
3003 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3004 struct iattr *sattr)
3006 struct nfs4_createdata *data;
3007 int status = -ENOMEM;
3009 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3013 status = nfs4_do_create(dir, dentry, data);
3015 nfs4_free_createdata(data);
3020 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3021 struct iattr *sattr)
3023 struct nfs4_exception exception = { };
3026 sattr->ia_mode &= ~current_umask();
3028 err = nfs4_handle_exception(NFS_SERVER(dir),
3029 _nfs4_proc_mkdir(dir, dentry, sattr),
3031 } while (exception.retry);
3035 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3036 u64 cookie, struct page **pages, unsigned int count, int plus)
3038 struct inode *dir = dentry->d_inode;
3039 struct nfs4_readdir_arg args = {
3044 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3047 struct nfs4_readdir_res res;
3048 struct rpc_message msg = {
3049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3056 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3057 dentry->d_parent->d_name.name,
3058 dentry->d_name.name,
3059 (unsigned long long)cookie);
3060 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3061 res.pgbase = args.pgbase;
3062 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3064 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3065 status += args.pgbase;
3068 nfs_invalidate_atime(dir);
3070 dprintk("%s: returns %d\n", __func__, status);
3074 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3075 u64 cookie, struct page **pages, unsigned int count, int plus)
3077 struct nfs4_exception exception = { };
3080 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3081 _nfs4_proc_readdir(dentry, cred, cookie,
3082 pages, count, plus),
3084 } while (exception.retry);
3088 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3089 struct iattr *sattr, dev_t rdev)
3091 struct nfs4_createdata *data;
3092 int mode = sattr->ia_mode;
3093 int status = -ENOMEM;
3095 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3096 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3098 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3103 data->arg.ftype = NF4FIFO;
3104 else if (S_ISBLK(mode)) {
3105 data->arg.ftype = NF4BLK;
3106 data->arg.u.device.specdata1 = MAJOR(rdev);
3107 data->arg.u.device.specdata2 = MINOR(rdev);
3109 else if (S_ISCHR(mode)) {
3110 data->arg.ftype = NF4CHR;
3111 data->arg.u.device.specdata1 = MAJOR(rdev);
3112 data->arg.u.device.specdata2 = MINOR(rdev);
3115 status = nfs4_do_create(dir, dentry, data);
3117 nfs4_free_createdata(data);
3122 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3123 struct iattr *sattr, dev_t rdev)
3125 struct nfs4_exception exception = { };
3128 sattr->ia_mode &= ~current_umask();
3130 err = nfs4_handle_exception(NFS_SERVER(dir),
3131 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3133 } while (exception.retry);
3137 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3138 struct nfs_fsstat *fsstat)
3140 struct nfs4_statfs_arg args = {
3142 .bitmask = server->attr_bitmask,
3144 struct nfs4_statfs_res res = {
3147 struct rpc_message msg = {
3148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3153 nfs_fattr_init(fsstat->fattr);
3154 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3157 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3159 struct nfs4_exception exception = { };
3162 err = nfs4_handle_exception(server,
3163 _nfs4_proc_statfs(server, fhandle, fsstat),
3165 } while (exception.retry);
3169 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3170 struct nfs_fsinfo *fsinfo)
3172 struct nfs4_fsinfo_arg args = {
3174 .bitmask = server->attr_bitmask,
3176 struct nfs4_fsinfo_res res = {
3179 struct rpc_message msg = {
3180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3185 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3188 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3190 struct nfs4_exception exception = { };
3194 err = nfs4_handle_exception(server,
3195 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3197 } while (exception.retry);
3201 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3203 nfs_fattr_init(fsinfo->fattr);
3204 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3207 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3208 struct nfs_pathconf *pathconf)
3210 struct nfs4_pathconf_arg args = {
3212 .bitmask = server->attr_bitmask,
3214 struct nfs4_pathconf_res res = {
3215 .pathconf = pathconf,
3217 struct rpc_message msg = {
3218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3223 /* None of the pathconf attributes are mandatory to implement */
3224 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3225 memset(pathconf, 0, sizeof(*pathconf));
3229 nfs_fattr_init(pathconf->fattr);
3230 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3233 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3234 struct nfs_pathconf *pathconf)
3236 struct nfs4_exception exception = { };
3240 err = nfs4_handle_exception(server,
3241 _nfs4_proc_pathconf(server, fhandle, pathconf),
3243 } while (exception.retry);
3247 void __nfs4_read_done_cb(struct nfs_read_data *data)
3249 nfs_invalidate_atime(data->inode);
3252 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3254 struct nfs_server *server = NFS_SERVER(data->inode);
3256 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3257 rpc_restart_call_prepare(task);
3261 __nfs4_read_done_cb(data);
3262 if (task->tk_status > 0)
3263 renew_lease(server, data->timestamp);
3267 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3270 dprintk("--> %s\n", __func__);
3272 if (!nfs4_sequence_done(task, &data->res.seq_res))
3275 return data->read_done_cb ? data->read_done_cb(task, data) :
3276 nfs4_read_done_cb(task, data);
3279 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3281 data->timestamp = jiffies;
3282 data->read_done_cb = nfs4_read_done_cb;
3283 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3284 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3287 /* Reset the the nfs_read_data to send the read to the MDS. */
3288 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3290 dprintk("%s Reset task for i/o through\n", __func__);
3291 put_lseg(data->lseg);
3293 /* offsets will differ in the dense stripe case */
3294 data->args.offset = data->mds_offset;
3295 data->ds_clp = NULL;
3296 data->args.fh = NFS_FH(data->inode);
3297 data->read_done_cb = nfs4_read_done_cb;
3298 task->tk_ops = data->mds_ops;
3299 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3301 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3303 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3305 struct inode *inode = data->inode;
3307 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3308 rpc_restart_call_prepare(task);
3311 if (task->tk_status >= 0) {
3312 renew_lease(NFS_SERVER(inode), data->timestamp);
3313 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3318 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3320 if (!nfs4_sequence_done(task, &data->res.seq_res))
3322 return data->write_done_cb ? data->write_done_cb(task, data) :
3323 nfs4_write_done_cb(task, data);
3326 /* Reset the the nfs_write_data to send the write to the MDS. */
3327 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3329 dprintk("%s Reset task for i/o through\n", __func__);
3330 put_lseg(data->lseg);
3332 data->ds_clp = NULL;
3333 data->write_done_cb = nfs4_write_done_cb;
3334 data->args.fh = NFS_FH(data->inode);
3335 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3336 data->args.offset = data->mds_offset;
3337 data->res.fattr = &data->fattr;
3338 task->tk_ops = data->mds_ops;
3339 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3341 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3343 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3345 struct nfs_server *server = NFS_SERVER(data->inode);
3348 data->args.bitmask = NULL;
3349 data->res.fattr = NULL;
3351 data->args.bitmask = server->cache_consistency_bitmask;
3352 if (!data->write_done_cb)
3353 data->write_done_cb = nfs4_write_done_cb;
3354 data->res.server = server;
3355 data->timestamp = jiffies;
3357 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3358 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3361 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3363 struct inode *inode = data->inode;
3365 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3366 rpc_restart_call_prepare(task);
3369 nfs_refresh_inode(inode, data->res.fattr);
3373 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3375 if (!nfs4_sequence_done(task, &data->res.seq_res))
3377 return data->write_done_cb(task, data);
3380 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3382 struct nfs_server *server = NFS_SERVER(data->inode);
3385 data->args.bitmask = NULL;
3386 data->res.fattr = NULL;
3388 data->args.bitmask = server->cache_consistency_bitmask;
3389 if (!data->write_done_cb)
3390 data->write_done_cb = nfs4_commit_done_cb;
3391 data->res.server = server;
3392 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3393 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3396 struct nfs4_renewdata {
3397 struct nfs_client *client;
3398 unsigned long timestamp;
3402 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3403 * standalone procedure for queueing an asynchronous RENEW.
3405 static void nfs4_renew_release(void *calldata)
3407 struct nfs4_renewdata *data = calldata;
3408 struct nfs_client *clp = data->client;
3410 if (atomic_read(&clp->cl_count) > 1)
3411 nfs4_schedule_state_renewal(clp);
3412 nfs_put_client(clp);
3416 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3418 struct nfs4_renewdata *data = calldata;
3419 struct nfs_client *clp = data->client;
3420 unsigned long timestamp = data->timestamp;
3422 if (task->tk_status < 0) {
3423 /* Unless we're shutting down, schedule state recovery! */
3424 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3426 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3427 nfs4_schedule_lease_recovery(clp);
3430 nfs4_schedule_path_down_recovery(clp);
3432 do_renew_lease(clp, timestamp);
3435 static const struct rpc_call_ops nfs4_renew_ops = {
3436 .rpc_call_done = nfs4_renew_done,
3437 .rpc_release = nfs4_renew_release,
3440 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3442 struct rpc_message msg = {
3443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3447 struct nfs4_renewdata *data;
3449 if (renew_flags == 0)
3451 if (!atomic_inc_not_zero(&clp->cl_count))
3453 data = kmalloc(sizeof(*data), GFP_NOFS);
3457 data->timestamp = jiffies;
3458 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3459 &nfs4_renew_ops, data);
3462 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3464 struct rpc_message msg = {
3465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3469 unsigned long now = jiffies;
3472 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3475 do_renew_lease(clp, now);
3479 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3481 return (server->caps & NFS_CAP_ACLS)
3482 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3483 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3486 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3487 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3490 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3492 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3493 struct page **pages, unsigned int *pgbase)
3495 struct page *newpage, **spages;
3501 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3502 newpage = alloc_page(GFP_KERNEL);
3504 if (newpage == NULL)
3506 memcpy(page_address(newpage), buf, len);
3511 } while (buflen != 0);
3517 __free_page(spages[rc-1]);
3521 struct nfs4_cached_acl {
3527 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3529 struct nfs_inode *nfsi = NFS_I(inode);
3531 spin_lock(&inode->i_lock);
3532 kfree(nfsi->nfs4_acl);
3533 nfsi->nfs4_acl = acl;
3534 spin_unlock(&inode->i_lock);
3537 static void nfs4_zap_acl_attr(struct inode *inode)
3539 nfs4_set_cached_acl(inode, NULL);
3542 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3544 struct nfs_inode *nfsi = NFS_I(inode);
3545 struct nfs4_cached_acl *acl;
3548 spin_lock(&inode->i_lock);
3549 acl = nfsi->nfs4_acl;
3552 if (buf == NULL) /* user is just asking for length */
3554 if (acl->cached == 0)
3556 ret = -ERANGE; /* see getxattr(2) man page */
3557 if (acl->len > buflen)
3559 memcpy(buf, acl->data, acl->len);
3563 spin_unlock(&inode->i_lock);
3567 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3569 struct nfs4_cached_acl *acl;
3571 if (buf && acl_len <= PAGE_SIZE) {
3572 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3576 memcpy(acl->data, buf, acl_len);
3578 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3585 nfs4_set_cached_acl(inode, acl);
3589 * The getxattr API returns the required buffer length when called with a
3590 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3591 * the required buf. On a NULL buf, we send a page of data to the server
3592 * guessing that the ACL request can be serviced by a page. If so, we cache
3593 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3594 * the cache. If not so, we throw away the page, and cache the required
3595 * length. The next getxattr call will then produce another round trip to
3596 * the server, this time with the input buf of the required size.
3598 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3600 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3601 struct nfs_getaclargs args = {
3602 .fh = NFS_FH(inode),
3606 struct nfs_getaclres res = {
3610 struct rpc_message msg = {
3611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3615 int ret = -ENOMEM, npages, i, acl_len = 0;
3617 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3618 /* As long as we're doing a round trip to the server anyway,
3619 * let's be prepared for a page of acl data. */
3623 for (i = 0; i < npages; i++) {
3624 pages[i] = alloc_page(GFP_KERNEL);
3629 /* for decoding across pages */
3630 res.acl_scratch = alloc_page(GFP_KERNEL);
3631 if (!res.acl_scratch)
3634 args.acl_len = npages * PAGE_SIZE;
3635 args.acl_pgbase = 0;
3636 /* Let decode_getfacl know not to fail if the ACL data is larger than
3637 * the page we send as a guess */
3639 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3640 resp_buf = page_address(pages[0]);
3642 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3643 __func__, buf, buflen, npages, args.acl_len);
3644 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3645 &msg, &args.seq_args, &res.seq_res, 0);
3649 acl_len = res.acl_len - res.acl_data_offset;
3650 if (acl_len > args.acl_len)
3651 nfs4_write_cached_acl(inode, NULL, acl_len);
3653 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3657 if (acl_len > buflen)
3659 _copy_from_pages(buf, pages, res.acl_data_offset,
3664 for (i = 0; i < npages; i++)
3666 __free_page(pages[i]);
3667 if (res.acl_scratch)
3668 __free_page(res.acl_scratch);
3672 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3674 struct nfs4_exception exception = { };
3677 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3680 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3681 } while (exception.retry);
3685 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3687 struct nfs_server *server = NFS_SERVER(inode);
3690 if (!nfs4_server_supports_acls(server))
3692 ret = nfs_revalidate_inode(server, inode);
3695 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3696 nfs_zap_acl_cache(inode);
3697 ret = nfs4_read_cached_acl(inode, buf, buflen);
3699 /* -ENOENT is returned if there is no ACL or if there is an ACL
3700 * but no cached acl data, just the acl length */
3702 return nfs4_get_acl_uncached(inode, buf, buflen);
3705 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3707 struct nfs_server *server = NFS_SERVER(inode);
3708 struct page *pages[NFS4ACL_MAXPAGES];
3709 struct nfs_setaclargs arg = {
3710 .fh = NFS_FH(inode),
3714 struct nfs_setaclres res;
3715 struct rpc_message msg = {
3716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3722 if (!nfs4_server_supports_acls(server))
3724 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3727 nfs_inode_return_delegation(inode);
3728 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3731 * Free each page after tx, so the only ref left is
3732 * held by the network stack
3735 put_page(pages[i-1]);
3738 * Acl update can result in inode attribute update.
3739 * so mark the attribute cache invalid.
3741 spin_lock(&inode->i_lock);
3742 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3743 spin_unlock(&inode->i_lock);
3744 nfs_access_zap_cache(inode);
3745 nfs_zap_acl_cache(inode);
3749 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3751 struct nfs4_exception exception = { };
3754 err = nfs4_handle_exception(NFS_SERVER(inode),
3755 __nfs4_proc_set_acl(inode, buf, buflen),
3757 } while (exception.retry);
3762 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3764 struct nfs_client *clp = server->nfs_client;
3766 if (task->tk_status >= 0)
3768 switch(task->tk_status) {
3769 case -NFS4ERR_DELEG_REVOKED:
3770 case -NFS4ERR_ADMIN_REVOKED:
3771 case -NFS4ERR_BAD_STATEID:
3773 nfs_remove_bad_delegation(state->inode);
3774 case -NFS4ERR_OPENMODE:
3777 nfs4_schedule_stateid_recovery(server, state);
3778 goto wait_on_recovery;
3779 case -NFS4ERR_EXPIRED:
3781 nfs4_schedule_stateid_recovery(server, state);
3782 case -NFS4ERR_STALE_STATEID:
3783 case -NFS4ERR_STALE_CLIENTID:
3784 nfs4_schedule_lease_recovery(clp);
3785 goto wait_on_recovery;
3786 #if defined(CONFIG_NFS_V4_1)
3787 case -NFS4ERR_BADSESSION:
3788 case -NFS4ERR_BADSLOT:
3789 case -NFS4ERR_BAD_HIGH_SLOT:
3790 case -NFS4ERR_DEADSESSION:
3791 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3792 case -NFS4ERR_SEQ_FALSE_RETRY:
3793 case -NFS4ERR_SEQ_MISORDERED:
3794 dprintk("%s ERROR %d, Reset session\n", __func__,
3796 nfs4_schedule_session_recovery(clp->cl_session);
3797 task->tk_status = 0;
3799 #endif /* CONFIG_NFS_V4_1 */
3800 case -NFS4ERR_DELAY:
3801 nfs_inc_server_stats(server, NFSIOS_DELAY);
3802 case -NFS4ERR_GRACE:
3804 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3805 task->tk_status = 0;
3807 case -NFS4ERR_RETRY_UNCACHED_REP:
3808 case -NFS4ERR_OLD_STATEID:
3809 task->tk_status = 0;
3812 task->tk_status = nfs4_map_errors(task->tk_status);
3815 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3816 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3817 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3818 task->tk_status = 0;
3822 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3823 unsigned short port, struct rpc_cred *cred,
3824 struct nfs4_setclientid_res *res)
3826 nfs4_verifier sc_verifier;
3827 struct nfs4_setclientid setclientid = {
3828 .sc_verifier = &sc_verifier,
3830 .sc_cb_ident = clp->cl_cb_ident,
3832 struct rpc_message msg = {
3833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3834 .rpc_argp = &setclientid,
3842 p = (__be32*)sc_verifier.data;
3843 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3844 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3848 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3849 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3851 rpc_peeraddr2str(clp->cl_rpcclient,
3853 rpc_peeraddr2str(clp->cl_rpcclient,
3855 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3856 clp->cl_id_uniquifier);
3857 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3858 sizeof(setclientid.sc_netid),
3859 rpc_peeraddr2str(clp->cl_rpcclient,
3860 RPC_DISPLAY_NETID));
3861 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3862 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3863 clp->cl_ipaddr, port >> 8, port & 255);
3866 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3867 if (status != -NFS4ERR_CLID_INUSE)
3870 ++clp->cl_id_uniquifier;
3874 ssleep(clp->cl_lease_time / HZ + 1);
3879 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3880 struct nfs4_setclientid_res *arg,
3881 struct rpc_cred *cred)
3883 struct nfs_fsinfo fsinfo;
3884 struct rpc_message msg = {
3885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3887 .rpc_resp = &fsinfo,
3894 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3896 spin_lock(&clp->cl_lock);
3897 clp->cl_lease_time = fsinfo.lease_time * HZ;
3898 clp->cl_last_renewal = now;
3899 spin_unlock(&clp->cl_lock);
3904 struct nfs4_delegreturndata {
3905 struct nfs4_delegreturnargs args;
3906 struct nfs4_delegreturnres res;
3908 nfs4_stateid stateid;
3909 unsigned long timestamp;
3910 struct nfs_fattr fattr;
3914 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3916 struct nfs4_delegreturndata *data = calldata;
3918 if (!nfs4_sequence_done(task, &data->res.seq_res))
3921 switch (task->tk_status) {
3922 case -NFS4ERR_STALE_STATEID:
3923 case -NFS4ERR_EXPIRED:
3925 renew_lease(data->res.server, data->timestamp);
3928 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3930 rpc_restart_call_prepare(task);
3934 data->rpc_status = task->tk_status;
3937 static void nfs4_delegreturn_release(void *calldata)
3942 #if defined(CONFIG_NFS_V4_1)
3943 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3945 struct nfs4_delegreturndata *d_data;
3947 d_data = (struct nfs4_delegreturndata *)data;
3949 if (nfs4_setup_sequence(d_data->res.server,
3950 &d_data->args.seq_args,
3951 &d_data->res.seq_res, task))
3953 rpc_call_start(task);
3955 #endif /* CONFIG_NFS_V4_1 */
3957 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3958 #if defined(CONFIG_NFS_V4_1)
3959 .rpc_call_prepare = nfs4_delegreturn_prepare,
3960 #endif /* CONFIG_NFS_V4_1 */
3961 .rpc_call_done = nfs4_delegreturn_done,
3962 .rpc_release = nfs4_delegreturn_release,
3965 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3967 struct nfs4_delegreturndata *data;
3968 struct nfs_server *server = NFS_SERVER(inode);
3969 struct rpc_task *task;
3970 struct rpc_message msg = {
3971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3974 struct rpc_task_setup task_setup_data = {
3975 .rpc_client = server->client,
3976 .rpc_message = &msg,
3977 .callback_ops = &nfs4_delegreturn_ops,
3978 .flags = RPC_TASK_ASYNC,
3982 data = kzalloc(sizeof(*data), GFP_NOFS);
3985 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3986 data->args.fhandle = &data->fh;
3987 data->args.stateid = &data->stateid;
3988 data->args.bitmask = server->attr_bitmask;
3989 nfs_copy_fh(&data->fh, NFS_FH(inode));
3990 nfs4_stateid_copy(&data->stateid, stateid);
3991 data->res.fattr = &data->fattr;
3992 data->res.server = server;
3993 nfs_fattr_init(data->res.fattr);
3994 data->timestamp = jiffies;
3995 data->rpc_status = 0;
3997 task_setup_data.callback_data = data;
3998 msg.rpc_argp = &data->args;
3999 msg.rpc_resp = &data->res;
4000 task = rpc_run_task(&task_setup_data);
4002 return PTR_ERR(task);
4005 status = nfs4_wait_for_completion_rpc_task(task);
4008 status = data->rpc_status;
4011 nfs_refresh_inode(inode, &data->fattr);
4017 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4019 struct nfs_server *server = NFS_SERVER(inode);
4020 struct nfs4_exception exception = { };
4023 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4025 case -NFS4ERR_STALE_STATEID:
4026 case -NFS4ERR_EXPIRED:
4030 err = nfs4_handle_exception(server, err, &exception);
4031 } while (exception.retry);
4035 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4036 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4039 * sleep, with exponential backoff, and retry the LOCK operation.
4041 static unsigned long
4042 nfs4_set_lock_task_retry(unsigned long timeout)
4044 freezable_schedule_timeout_killable(timeout);
4046 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4047 return NFS4_LOCK_MAXTIMEOUT;
4051 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4053 struct inode *inode = state->inode;
4054 struct nfs_server *server = NFS_SERVER(inode);
4055 struct nfs_client *clp = server->nfs_client;
4056 struct nfs_lockt_args arg = {
4057 .fh = NFS_FH(inode),
4060 struct nfs_lockt_res res = {
4063 struct rpc_message msg = {
4064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4067 .rpc_cred = state->owner->so_cred,
4069 struct nfs4_lock_state *lsp;
4072 arg.lock_owner.clientid = clp->cl_clientid;
4073 status = nfs4_set_lock_state(state, request);
4076 lsp = request->fl_u.nfs4_fl.owner;
4077 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4078 arg.lock_owner.s_dev = server->s_dev;
4079 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4082 request->fl_type = F_UNLCK;
4084 case -NFS4ERR_DENIED:
4087 request->fl_ops->fl_release_private(request);
4092 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4094 struct nfs4_exception exception = { };
4098 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4099 _nfs4_proc_getlk(state, cmd, request),
4101 } while (exception.retry);
4105 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4108 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4110 res = posix_lock_file_wait(file, fl);
4113 res = flock_lock_file_wait(file, fl);
4121 struct nfs4_unlockdata {
4122 struct nfs_locku_args arg;
4123 struct nfs_locku_res res;
4124 struct nfs4_lock_state *lsp;
4125 struct nfs_open_context *ctx;
4126 struct file_lock fl;
4127 const struct nfs_server *server;
4128 unsigned long timestamp;
4131 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4132 struct nfs_open_context *ctx,
4133 struct nfs4_lock_state *lsp,
4134 struct nfs_seqid *seqid)
4136 struct nfs4_unlockdata *p;
4137 struct inode *inode = lsp->ls_state->inode;
4139 p = kzalloc(sizeof(*p), GFP_NOFS);
4142 p->arg.fh = NFS_FH(inode);
4144 p->arg.seqid = seqid;
4145 p->res.seqid = seqid;
4146 p->arg.stateid = &lsp->ls_stateid;
4148 atomic_inc(&lsp->ls_count);
4149 /* Ensure we don't close file until we're done freeing locks! */
4150 p->ctx = get_nfs_open_context(ctx);
4151 memcpy(&p->fl, fl, sizeof(p->fl));
4152 p->server = NFS_SERVER(inode);
4156 static void nfs4_locku_release_calldata(void *data)
4158 struct nfs4_unlockdata *calldata = data;
4159 nfs_free_seqid(calldata->arg.seqid);
4160 nfs4_put_lock_state(calldata->lsp);
4161 put_nfs_open_context(calldata->ctx);
4165 static void nfs4_locku_done(struct rpc_task *task, void *data)
4167 struct nfs4_unlockdata *calldata = data;
4169 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4171 switch (task->tk_status) {
4173 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4174 &calldata->res.stateid);
4175 renew_lease(calldata->server, calldata->timestamp);
4177 case -NFS4ERR_BAD_STATEID:
4178 case -NFS4ERR_OLD_STATEID:
4179 case -NFS4ERR_STALE_STATEID:
4180 case -NFS4ERR_EXPIRED:
4183 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4184 rpc_restart_call_prepare(task);
4188 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4190 struct nfs4_unlockdata *calldata = data;
4192 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4194 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4195 /* Note: exit _without_ running nfs4_locku_done */
4196 task->tk_action = NULL;
4199 calldata->timestamp = jiffies;
4200 if (nfs4_setup_sequence(calldata->server,
4201 &calldata->arg.seq_args,
4202 &calldata->res.seq_res, task))
4204 rpc_call_start(task);
4207 static const struct rpc_call_ops nfs4_locku_ops = {
4208 .rpc_call_prepare = nfs4_locku_prepare,
4209 .rpc_call_done = nfs4_locku_done,
4210 .rpc_release = nfs4_locku_release_calldata,
4213 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4214 struct nfs_open_context *ctx,
4215 struct nfs4_lock_state *lsp,
4216 struct nfs_seqid *seqid)
4218 struct nfs4_unlockdata *data;
4219 struct rpc_message msg = {
4220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4221 .rpc_cred = ctx->cred,
4223 struct rpc_task_setup task_setup_data = {
4224 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4225 .rpc_message = &msg,
4226 .callback_ops = &nfs4_locku_ops,
4227 .workqueue = nfsiod_workqueue,
4228 .flags = RPC_TASK_ASYNC,
4231 /* Ensure this is an unlock - when canceling a lock, the
4232 * canceled lock is passed in, and it won't be an unlock.
4234 fl->fl_type = F_UNLCK;
4236 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4238 nfs_free_seqid(seqid);
4239 return ERR_PTR(-ENOMEM);
4242 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4243 msg.rpc_argp = &data->arg;
4244 msg.rpc_resp = &data->res;
4245 task_setup_data.callback_data = data;
4246 return rpc_run_task(&task_setup_data);
4249 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4251 struct nfs_inode *nfsi = NFS_I(state->inode);
4252 struct nfs_seqid *seqid;
4253 struct nfs4_lock_state *lsp;
4254 struct rpc_task *task;
4256 unsigned char fl_flags = request->fl_flags;
4258 status = nfs4_set_lock_state(state, request);
4259 /* Unlock _before_ we do the RPC call */
4260 request->fl_flags |= FL_EXISTS;
4261 down_read(&nfsi->rwsem);
4262 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4263 up_read(&nfsi->rwsem);
4266 up_read(&nfsi->rwsem);
4269 /* Is this a delegated lock? */
4270 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4272 lsp = request->fl_u.nfs4_fl.owner;
4273 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4277 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4278 status = PTR_ERR(task);
4281 status = nfs4_wait_for_completion_rpc_task(task);
4284 request->fl_flags = fl_flags;
4288 struct nfs4_lockdata {
4289 struct nfs_lock_args arg;
4290 struct nfs_lock_res res;
4291 struct nfs4_lock_state *lsp;
4292 struct nfs_open_context *ctx;
4293 struct file_lock fl;
4294 unsigned long timestamp;
4297 struct nfs_server *server;
4300 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4301 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4304 struct nfs4_lockdata *p;
4305 struct inode *inode = lsp->ls_state->inode;
4306 struct nfs_server *server = NFS_SERVER(inode);
4308 p = kzalloc(sizeof(*p), gfp_mask);
4312 p->arg.fh = NFS_FH(inode);
4314 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4315 if (p->arg.open_seqid == NULL)
4317 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4318 if (p->arg.lock_seqid == NULL)
4319 goto out_free_seqid;
4320 p->arg.lock_stateid = &lsp->ls_stateid;
4321 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4322 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4323 p->arg.lock_owner.s_dev = server->s_dev;
4324 p->res.lock_seqid = p->arg.lock_seqid;
4327 atomic_inc(&lsp->ls_count);
4328 p->ctx = get_nfs_open_context(ctx);
4329 memcpy(&p->fl, fl, sizeof(p->fl));
4332 nfs_free_seqid(p->arg.open_seqid);
4338 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4340 struct nfs4_lockdata *data = calldata;
4341 struct nfs4_state *state = data->lsp->ls_state;
4343 dprintk("%s: begin!\n", __func__);
4344 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4346 /* Do we need to do an open_to_lock_owner? */
4347 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4348 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4350 data->arg.open_stateid = &state->stateid;
4351 data->arg.new_lock_owner = 1;
4352 data->res.open_seqid = data->arg.open_seqid;
4354 data->arg.new_lock_owner = 0;
4355 data->timestamp = jiffies;
4356 if (nfs4_setup_sequence(data->server,
4357 &data->arg.seq_args,
4358 &data->res.seq_res, task))
4360 rpc_call_start(task);
4361 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4364 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4367 nfs4_lock_prepare(task, calldata);
4370 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4372 struct nfs4_lockdata *data = calldata;
4374 dprintk("%s: begin!\n", __func__);
4376 if (!nfs4_sequence_done(task, &data->res.seq_res))
4379 data->rpc_status = task->tk_status;
4380 if (data->arg.new_lock_owner != 0) {
4381 if (data->rpc_status == 0)
4382 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4386 if (data->rpc_status == 0) {
4387 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4388 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4389 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4392 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4395 static void nfs4_lock_release(void *calldata)
4397 struct nfs4_lockdata *data = calldata;
4399 dprintk("%s: begin!\n", __func__);
4400 nfs_free_seqid(data->arg.open_seqid);
4401 if (data->cancelled != 0) {
4402 struct rpc_task *task;
4403 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4404 data->arg.lock_seqid);
4406 rpc_put_task_async(task);
4407 dprintk("%s: cancelling lock!\n", __func__);
4409 nfs_free_seqid(data->arg.lock_seqid);
4410 nfs4_put_lock_state(data->lsp);
4411 put_nfs_open_context(data->ctx);
4413 dprintk("%s: done!\n", __func__);
4416 static const struct rpc_call_ops nfs4_lock_ops = {
4417 .rpc_call_prepare = nfs4_lock_prepare,
4418 .rpc_call_done = nfs4_lock_done,
4419 .rpc_release = nfs4_lock_release,
4422 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4423 .rpc_call_prepare = nfs4_recover_lock_prepare,
4424 .rpc_call_done = nfs4_lock_done,
4425 .rpc_release = nfs4_lock_release,
4428 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4431 case -NFS4ERR_ADMIN_REVOKED:
4432 case -NFS4ERR_BAD_STATEID:
4433 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4434 if (new_lock_owner != 0 ||
4435 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4436 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4438 case -NFS4ERR_STALE_STATEID:
4439 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4440 case -NFS4ERR_EXPIRED:
4441 nfs4_schedule_lease_recovery(server->nfs_client);
4445 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4447 struct nfs4_lockdata *data;
4448 struct rpc_task *task;
4449 struct rpc_message msg = {
4450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4451 .rpc_cred = state->owner->so_cred,
4453 struct rpc_task_setup task_setup_data = {
4454 .rpc_client = NFS_CLIENT(state->inode),
4455 .rpc_message = &msg,
4456 .callback_ops = &nfs4_lock_ops,
4457 .workqueue = nfsiod_workqueue,
4458 .flags = RPC_TASK_ASYNC,
4462 dprintk("%s: begin!\n", __func__);
4463 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4464 fl->fl_u.nfs4_fl.owner,
4465 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4469 data->arg.block = 1;
4470 if (recovery_type > NFS_LOCK_NEW) {
4471 if (recovery_type == NFS_LOCK_RECLAIM)
4472 data->arg.reclaim = NFS_LOCK_RECLAIM;
4473 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4475 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4476 msg.rpc_argp = &data->arg;
4477 msg.rpc_resp = &data->res;
4478 task_setup_data.callback_data = data;
4479 task = rpc_run_task(&task_setup_data);
4481 return PTR_ERR(task);
4482 ret = nfs4_wait_for_completion_rpc_task(task);
4484 ret = data->rpc_status;
4486 nfs4_handle_setlk_error(data->server, data->lsp,
4487 data->arg.new_lock_owner, ret);
4489 data->cancelled = 1;
4491 dprintk("%s: done, ret = %d!\n", __func__, ret);
4495 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4497 struct nfs_server *server = NFS_SERVER(state->inode);
4498 struct nfs4_exception exception = { };
4502 /* Cache the lock if possible... */
4503 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4505 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4506 if (err != -NFS4ERR_DELAY)
4508 nfs4_handle_exception(server, err, &exception);
4509 } while (exception.retry);
4513 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4515 struct nfs_server *server = NFS_SERVER(state->inode);
4516 struct nfs4_exception exception = { };
4519 err = nfs4_set_lock_state(state, request);
4523 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4525 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4529 case -NFS4ERR_GRACE:
4530 case -NFS4ERR_DELAY:
4531 nfs4_handle_exception(server, err, &exception);
4534 } while (exception.retry);
4539 #if defined(CONFIG_NFS_V4_1)
4540 static int nfs41_check_expired_locks(struct nfs4_state *state)
4542 int status, ret = NFS_OK;
4543 struct nfs4_lock_state *lsp;
4544 struct nfs_server *server = NFS_SERVER(state->inode);
4546 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4547 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4548 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4549 if (status != NFS_OK) {
4550 nfs41_free_stateid(server, &lsp->ls_stateid);
4551 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4560 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4562 int status = NFS_OK;
4564 if (test_bit(LK_STATE_IN_USE, &state->flags))
4565 status = nfs41_check_expired_locks(state);
4566 if (status == NFS_OK)
4568 return nfs4_lock_expired(state, request);
4572 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4574 struct nfs_inode *nfsi = NFS_I(state->inode);
4575 unsigned char fl_flags = request->fl_flags;
4576 int status = -ENOLCK;
4578 if ((fl_flags & FL_POSIX) &&
4579 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4581 /* Is this a delegated open? */
4582 status = nfs4_set_lock_state(state, request);
4585 request->fl_flags |= FL_ACCESS;
4586 status = do_vfs_lock(request->fl_file, request);
4589 down_read(&nfsi->rwsem);
4590 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4591 /* Yes: cache locks! */
4592 /* ...but avoid races with delegation recall... */
4593 request->fl_flags = fl_flags & ~FL_SLEEP;
4594 status = do_vfs_lock(request->fl_file, request);
4597 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4600 /* Note: we always want to sleep here! */
4601 request->fl_flags = fl_flags | FL_SLEEP;
4602 if (do_vfs_lock(request->fl_file, request) < 0)
4603 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4604 "manager!\n", __func__);
4606 up_read(&nfsi->rwsem);
4608 request->fl_flags = fl_flags;
4612 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4614 struct nfs4_exception exception = {
4620 err = _nfs4_proc_setlk(state, cmd, request);
4621 if (err == -NFS4ERR_DENIED)
4623 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4625 } while (exception.retry);
4630 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4632 struct nfs_open_context *ctx;
4633 struct nfs4_state *state;
4634 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4637 /* verify open state */
4638 ctx = nfs_file_open_context(filp);
4641 if (request->fl_start < 0 || request->fl_end < 0)
4644 if (IS_GETLK(cmd)) {
4646 return nfs4_proc_getlk(state, F_GETLK, request);
4650 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4653 if (request->fl_type == F_UNLCK) {
4655 return nfs4_proc_unlck(state, cmd, request);
4662 status = nfs4_proc_setlk(state, cmd, request);
4663 if ((status != -EAGAIN) || IS_SETLK(cmd))
4665 timeout = nfs4_set_lock_task_retry(timeout);
4666 status = -ERESTARTSYS;
4669 } while(status < 0);
4673 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4675 struct nfs_server *server = NFS_SERVER(state->inode);
4676 struct nfs4_exception exception = { };
4679 err = nfs4_set_lock_state(state, fl);
4683 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4686 printk(KERN_ERR "NFS: %s: unhandled error "
4687 "%d.\n", __func__, err);
4691 case -NFS4ERR_EXPIRED:
4692 nfs4_schedule_stateid_recovery(server, state);
4693 case -NFS4ERR_STALE_CLIENTID:
4694 case -NFS4ERR_STALE_STATEID:
4695 nfs4_schedule_lease_recovery(server->nfs_client);
4697 case -NFS4ERR_BADSESSION:
4698 case -NFS4ERR_BADSLOT:
4699 case -NFS4ERR_BAD_HIGH_SLOT:
4700 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4701 case -NFS4ERR_DEADSESSION:
4702 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4706 * The show must go on: exit, but mark the
4707 * stateid as needing recovery.
4709 case -NFS4ERR_DELEG_REVOKED:
4710 case -NFS4ERR_ADMIN_REVOKED:
4711 case -NFS4ERR_BAD_STATEID:
4712 case -NFS4ERR_OPENMODE:
4713 nfs4_schedule_stateid_recovery(server, state);
4718 * User RPCSEC_GSS context has expired.
4719 * We cannot recover this stateid now, so
4720 * skip it and allow recovery thread to
4726 case -NFS4ERR_DENIED:
4727 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4730 case -NFS4ERR_DELAY:
4733 err = nfs4_handle_exception(server, err, &exception);
4734 } while (exception.retry);
4739 static void nfs4_release_lockowner_release(void *calldata)
4744 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4745 .rpc_release = nfs4_release_lockowner_release,
4748 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4750 struct nfs_server *server = lsp->ls_state->owner->so_server;
4751 struct nfs_release_lockowner_args *args;
4752 struct rpc_message msg = {
4753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4756 if (server->nfs_client->cl_mvops->minor_version != 0)
4758 args = kmalloc(sizeof(*args), GFP_NOFS);
4761 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4762 args->lock_owner.id = lsp->ls_seqid.owner_id;
4763 args->lock_owner.s_dev = server->s_dev;
4764 msg.rpc_argp = args;
4765 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4768 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4770 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4771 const void *buf, size_t buflen,
4772 int flags, int type)
4774 if (strcmp(key, "") != 0)
4777 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4780 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4781 void *buf, size_t buflen, int type)
4783 if (strcmp(key, "") != 0)
4786 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4789 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4790 size_t list_len, const char *name,
4791 size_t name_len, int type)
4793 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4795 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4798 if (list && len <= list_len)
4799 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4804 * nfs_fhget will use either the mounted_on_fileid or the fileid
4806 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4808 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4809 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4810 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4811 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4814 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4815 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4816 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4820 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4821 struct nfs4_fs_locations *fs_locations, struct page *page)
4823 struct nfs_server *server = NFS_SERVER(dir);
4825 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4827 struct nfs4_fs_locations_arg args = {
4828 .dir_fh = NFS_FH(dir),
4833 struct nfs4_fs_locations_res res = {
4834 .fs_locations = fs_locations,
4836 struct rpc_message msg = {
4837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4843 dprintk("%s: start\n", __func__);
4845 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4846 * is not supported */
4847 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4848 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4850 bitmask[0] |= FATTR4_WORD0_FILEID;
4852 nfs_fattr_init(&fs_locations->fattr);
4853 fs_locations->server = server;
4854 fs_locations->nlocations = 0;
4855 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4856 dprintk("%s: returned status = %d\n", __func__, status);
4860 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4863 struct nfs4_secinfo_arg args = {
4864 .dir_fh = NFS_FH(dir),
4867 struct nfs4_secinfo_res res = {
4870 struct rpc_message msg = {
4871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4876 dprintk("NFS call secinfo %s\n", name->name);
4877 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4878 dprintk("NFS reply secinfo: %d\n", status);
4882 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4884 struct nfs4_exception exception = { };
4887 err = nfs4_handle_exception(NFS_SERVER(dir),
4888 _nfs4_proc_secinfo(dir, name, flavors),
4890 } while (exception.retry);
4894 #ifdef CONFIG_NFS_V4_1
4896 * Check the exchange flags returned by the server for invalid flags, having
4897 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4900 static int nfs4_check_cl_exchange_flags(u32 flags)
4902 if (flags & ~EXCHGID4_FLAG_MASK_R)
4904 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4905 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4907 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4911 return -NFS4ERR_INVAL;
4915 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4917 if (a->server_scope_sz == b->server_scope_sz &&
4918 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4925 * nfs4_proc_exchange_id()
4927 * Since the clientid has expired, all compounds using sessions
4928 * associated with the stale clientid will be returning
4929 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4930 * be in some phase of session reset.
4932 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4934 nfs4_verifier verifier;
4935 struct nfs41_exchange_id_args args = {
4937 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4939 struct nfs41_exchange_id_res res = {
4943 struct rpc_message msg = {
4944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4951 dprintk("--> %s\n", __func__);
4952 BUG_ON(clp == NULL);
4954 p = (u32 *)verifier.data;
4955 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4956 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4957 args.verifier = &verifier;
4959 args.id_len = scnprintf(args.id, sizeof(args.id),
4962 init_utsname()->nodename,
4963 init_utsname()->domainname,
4964 clp->cl_rpcclient->cl_auth->au_flavor);
4966 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4967 if (unlikely(!res.server_scope)) {
4972 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
4973 if (unlikely(!res.impl_id)) {
4975 goto out_server_scope;
4978 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4980 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4983 /* use the most recent implementation id */
4984 kfree(clp->impl_id);
4985 clp->impl_id = res.impl_id;
4990 if (clp->server_scope &&
4991 !nfs41_same_server_scope(clp->server_scope,
4992 res.server_scope)) {
4993 dprintk("%s: server_scope mismatch detected\n",
4995 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4996 kfree(clp->server_scope);
4997 clp->server_scope = NULL;
5000 if (!clp->server_scope) {
5001 clp->server_scope = res.server_scope;
5007 kfree(res.server_scope);
5010 dprintk("%s: Server Implementation ID: "
5011 "domain: %s, name: %s, date: %llu,%u\n",
5012 __func__, clp->impl_id->domain, clp->impl_id->name,
5013 clp->impl_id->date.seconds,
5014 clp->impl_id->date.nseconds);
5015 dprintk("<-- %s status= %d\n", __func__, status);
5019 struct nfs4_get_lease_time_data {
5020 struct nfs4_get_lease_time_args *args;
5021 struct nfs4_get_lease_time_res *res;
5022 struct nfs_client *clp;
5025 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5029 struct nfs4_get_lease_time_data *data =
5030 (struct nfs4_get_lease_time_data *)calldata;
5032 dprintk("--> %s\n", __func__);
5033 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5034 /* just setup sequence, do not trigger session recovery
5035 since we're invoked within one */
5036 ret = nfs41_setup_sequence(data->clp->cl_session,
5037 &data->args->la_seq_args,
5038 &data->res->lr_seq_res, task);
5040 BUG_ON(ret == -EAGAIN);
5041 rpc_call_start(task);
5042 dprintk("<-- %s\n", __func__);
5046 * Called from nfs4_state_manager thread for session setup, so don't recover
5047 * from sequence operation or clientid errors.
5049 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5051 struct nfs4_get_lease_time_data *data =
5052 (struct nfs4_get_lease_time_data *)calldata;
5054 dprintk("--> %s\n", __func__);
5055 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5057 switch (task->tk_status) {
5058 case -NFS4ERR_DELAY:
5059 case -NFS4ERR_GRACE:
5060 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5061 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5062 task->tk_status = 0;
5064 case -NFS4ERR_RETRY_UNCACHED_REP:
5065 rpc_restart_call_prepare(task);
5068 dprintk("<-- %s\n", __func__);
5071 struct rpc_call_ops nfs4_get_lease_time_ops = {
5072 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5073 .rpc_call_done = nfs4_get_lease_time_done,
5076 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5078 struct rpc_task *task;
5079 struct nfs4_get_lease_time_args args;
5080 struct nfs4_get_lease_time_res res = {
5081 .lr_fsinfo = fsinfo,
5083 struct nfs4_get_lease_time_data data = {
5088 struct rpc_message msg = {
5089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5093 struct rpc_task_setup task_setup = {
5094 .rpc_client = clp->cl_rpcclient,
5095 .rpc_message = &msg,
5096 .callback_ops = &nfs4_get_lease_time_ops,
5097 .callback_data = &data,
5098 .flags = RPC_TASK_TIMEOUT,
5102 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5103 dprintk("--> %s\n", __func__);
5104 task = rpc_run_task(&task_setup);
5107 status = PTR_ERR(task);
5109 status = task->tk_status;
5112 dprintk("<-- %s return %d\n", __func__, status);
5117 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5119 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5122 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5123 struct nfs4_slot *new,
5127 struct nfs4_slot *old = NULL;
5130 spin_lock(&tbl->slot_tbl_lock);
5134 tbl->max_slots = max_slots;
5136 tbl->highest_used_slotid = -1; /* no slot is currently used */
5137 for (i = 0; i < tbl->max_slots; i++)
5138 tbl->slots[i].seq_nr = ivalue;
5139 spin_unlock(&tbl->slot_tbl_lock);
5144 * (re)Initialise a slot table
5146 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5149 struct nfs4_slot *new = NULL;
5152 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5153 max_reqs, tbl->max_slots);
5155 /* Does the newly negotiated max_reqs match the existing slot table? */
5156 if (max_reqs != tbl->max_slots) {
5157 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5163 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5164 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5165 tbl, tbl->slots, tbl->max_slots);
5167 dprintk("<-- %s: return %d\n", __func__, ret);
5171 /* Destroy the slot table */
5172 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5174 if (session->fc_slot_table.slots != NULL) {
5175 kfree(session->fc_slot_table.slots);
5176 session->fc_slot_table.slots = NULL;
5178 if (session->bc_slot_table.slots != NULL) {
5179 kfree(session->bc_slot_table.slots);
5180 session->bc_slot_table.slots = NULL;
5186 * Initialize or reset the forechannel and backchannel tables
5188 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5190 struct nfs4_slot_table *tbl;
5193 dprintk("--> %s\n", __func__);
5195 tbl = &ses->fc_slot_table;
5196 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5197 if (status) /* -ENOMEM */
5200 tbl = &ses->bc_slot_table;
5201 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5202 if (status && tbl->slots == NULL)
5203 /* Fore and back channel share a connection so get
5204 * both slot tables or neither */
5205 nfs4_destroy_slot_tables(ses);
5209 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5211 struct nfs4_session *session;
5212 struct nfs4_slot_table *tbl;
5214 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5218 tbl = &session->fc_slot_table;
5219 tbl->highest_used_slotid = NFS4_NO_SLOT;
5220 spin_lock_init(&tbl->slot_tbl_lock);
5221 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5222 init_completion(&tbl->complete);
5224 tbl = &session->bc_slot_table;
5225 tbl->highest_used_slotid = NFS4_NO_SLOT;
5226 spin_lock_init(&tbl->slot_tbl_lock);
5227 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5228 init_completion(&tbl->complete);
5230 session->session_state = 1<<NFS4_SESSION_INITING;
5236 void nfs4_destroy_session(struct nfs4_session *session)
5238 struct rpc_xprt *xprt;
5240 nfs4_proc_destroy_session(session);
5243 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5245 dprintk("%s Destroy backchannel for xprt %p\n",
5247 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5248 nfs4_destroy_slot_tables(session);
5253 * Initialize the values to be used by the client in CREATE_SESSION
5254 * If nfs4_init_session set the fore channel request and response sizes,
5257 * Set the back channel max_resp_sz_cached to zero to force the client to
5258 * always set csa_cachethis to FALSE because the current implementation
5259 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5261 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5263 struct nfs4_session *session = args->client->cl_session;
5264 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5265 mxresp_sz = session->fc_attrs.max_resp_sz;
5268 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5270 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5271 /* Fore channel attributes */
5272 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5273 args->fc_attrs.max_resp_sz = mxresp_sz;
5274 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5275 args->fc_attrs.max_reqs = max_session_slots;
5277 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5278 "max_ops=%u max_reqs=%u\n",
5280 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5281 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5283 /* Back channel attributes */
5284 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5285 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5286 args->bc_attrs.max_resp_sz_cached = 0;
5287 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5288 args->bc_attrs.max_reqs = 1;
5290 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5291 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5293 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5294 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5295 args->bc_attrs.max_reqs);
5298 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5300 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5301 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5303 if (rcvd->max_resp_sz > sent->max_resp_sz)
5306 * Our requested max_ops is the minimum we need; we're not
5307 * prepared to break up compounds into smaller pieces than that.
5308 * So, no point even trying to continue if the server won't
5311 if (rcvd->max_ops < sent->max_ops)
5313 if (rcvd->max_reqs == 0)
5315 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5316 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5320 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5322 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5323 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5325 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5327 if (rcvd->max_resp_sz < sent->max_resp_sz)
5329 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5331 /* These would render the backchannel useless: */
5332 if (rcvd->max_ops != sent->max_ops)
5334 if (rcvd->max_reqs != sent->max_reqs)
5339 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5340 struct nfs4_session *session)
5344 ret = nfs4_verify_fore_channel_attrs(args, session);
5347 return nfs4_verify_back_channel_attrs(args, session);
5350 static int _nfs4_proc_create_session(struct nfs_client *clp)
5352 struct nfs4_session *session = clp->cl_session;
5353 struct nfs41_create_session_args args = {
5355 .cb_program = NFS4_CALLBACK,
5357 struct nfs41_create_session_res res = {
5360 struct rpc_message msg = {
5361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5367 nfs4_init_channel_attrs(&args);
5368 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5370 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5373 /* Verify the session's negotiated channel_attrs values */
5374 status = nfs4_verify_channel_attrs(&args, session);
5376 /* Increment the clientid slot sequence id */
5384 * Issues a CREATE_SESSION operation to the server.
5385 * It is the responsibility of the caller to verify the session is
5386 * expired before calling this routine.
5388 int nfs4_proc_create_session(struct nfs_client *clp)
5392 struct nfs4_session *session = clp->cl_session;
5394 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5396 status = _nfs4_proc_create_session(clp);
5400 /* Init or reset the session slot tables */
5401 status = nfs4_setup_session_slot_tables(session);
5402 dprintk("slot table setup returned %d\n", status);
5406 ptr = (unsigned *)&session->sess_id.data[0];
5407 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5408 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5410 dprintk("<-- %s\n", __func__);
5415 * Issue the over-the-wire RPC DESTROY_SESSION.
5416 * The caller must serialize access to this routine.
5418 int nfs4_proc_destroy_session(struct nfs4_session *session)
5421 struct rpc_message msg;
5423 dprintk("--> nfs4_proc_destroy_session\n");
5425 /* session is still being setup */
5426 if (session->clp->cl_cons_state != NFS_CS_READY)
5429 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5430 msg.rpc_argp = session;
5431 msg.rpc_resp = NULL;
5432 msg.rpc_cred = NULL;
5433 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5437 "NFS: Got error %d from the server on DESTROY_SESSION. "
5438 "Session has been destroyed regardless...\n", status);
5440 dprintk("<-- nfs4_proc_destroy_session\n");
5444 int nfs4_init_session(struct nfs_server *server)
5446 struct nfs_client *clp = server->nfs_client;
5447 struct nfs4_session *session;
5448 unsigned int rsize, wsize;
5451 if (!nfs4_has_session(clp))
5454 session = clp->cl_session;
5455 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5458 rsize = server->rsize;
5460 rsize = NFS_MAX_FILE_IO_SIZE;
5461 wsize = server->wsize;
5463 wsize = NFS_MAX_FILE_IO_SIZE;
5465 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5466 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5468 ret = nfs4_recover_expired_lease(server);
5470 ret = nfs4_check_client_ready(clp);
5474 int nfs4_init_ds_session(struct nfs_client *clp)
5476 struct nfs4_session *session = clp->cl_session;
5479 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5482 ret = nfs4_client_recover_expired_lease(clp);
5484 /* Test for the DS role */
5485 if (!is_ds_client(clp))
5488 ret = nfs4_check_client_ready(clp);
5492 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5496 * Renew the cl_session lease.
5498 struct nfs4_sequence_data {
5499 struct nfs_client *clp;
5500 struct nfs4_sequence_args args;
5501 struct nfs4_sequence_res res;
5504 static void nfs41_sequence_release(void *data)
5506 struct nfs4_sequence_data *calldata = data;
5507 struct nfs_client *clp = calldata->clp;
5509 if (atomic_read(&clp->cl_count) > 1)
5510 nfs4_schedule_state_renewal(clp);
5511 nfs_put_client(clp);
5515 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5517 switch(task->tk_status) {
5518 case -NFS4ERR_DELAY:
5519 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5522 nfs4_schedule_lease_recovery(clp);
5527 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5529 struct nfs4_sequence_data *calldata = data;
5530 struct nfs_client *clp = calldata->clp;
5532 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5535 if (task->tk_status < 0) {
5536 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5537 if (atomic_read(&clp->cl_count) == 1)
5540 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5541 rpc_restart_call_prepare(task);
5545 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5547 dprintk("<-- %s\n", __func__);
5550 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5552 struct nfs4_sequence_data *calldata = data;
5553 struct nfs_client *clp = calldata->clp;
5554 struct nfs4_sequence_args *args;
5555 struct nfs4_sequence_res *res;
5557 args = task->tk_msg.rpc_argp;
5558 res = task->tk_msg.rpc_resp;
5560 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5562 rpc_call_start(task);
5565 static const struct rpc_call_ops nfs41_sequence_ops = {
5566 .rpc_call_done = nfs41_sequence_call_done,
5567 .rpc_call_prepare = nfs41_sequence_prepare,
5568 .rpc_release = nfs41_sequence_release,
5571 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5573 struct nfs4_sequence_data *calldata;
5574 struct rpc_message msg = {
5575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5578 struct rpc_task_setup task_setup_data = {
5579 .rpc_client = clp->cl_rpcclient,
5580 .rpc_message = &msg,
5581 .callback_ops = &nfs41_sequence_ops,
5582 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5585 if (!atomic_inc_not_zero(&clp->cl_count))
5586 return ERR_PTR(-EIO);
5587 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5588 if (calldata == NULL) {
5589 nfs_put_client(clp);
5590 return ERR_PTR(-ENOMEM);
5592 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5593 msg.rpc_argp = &calldata->args;
5594 msg.rpc_resp = &calldata->res;
5595 calldata->clp = clp;
5596 task_setup_data.callback_data = calldata;
5598 return rpc_run_task(&task_setup_data);
5601 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5603 struct rpc_task *task;
5606 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5608 task = _nfs41_proc_sequence(clp, cred);
5610 ret = PTR_ERR(task);
5612 rpc_put_task_async(task);
5613 dprintk("<-- %s status=%d\n", __func__, ret);
5617 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5619 struct rpc_task *task;
5622 task = _nfs41_proc_sequence(clp, cred);
5624 ret = PTR_ERR(task);
5627 ret = rpc_wait_for_completion_task(task);
5629 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5631 if (task->tk_status == 0)
5632 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5633 ret = task->tk_status;
5637 dprintk("<-- %s status=%d\n", __func__, ret);
5641 struct nfs4_reclaim_complete_data {
5642 struct nfs_client *clp;
5643 struct nfs41_reclaim_complete_args arg;
5644 struct nfs41_reclaim_complete_res res;
5647 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5649 struct nfs4_reclaim_complete_data *calldata = data;
5651 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5652 if (nfs41_setup_sequence(calldata->clp->cl_session,
5653 &calldata->arg.seq_args,
5654 &calldata->res.seq_res, task))
5657 rpc_call_start(task);
5660 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5662 switch(task->tk_status) {
5664 case -NFS4ERR_COMPLETE_ALREADY:
5665 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5667 case -NFS4ERR_DELAY:
5668 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5670 case -NFS4ERR_RETRY_UNCACHED_REP:
5673 nfs4_schedule_lease_recovery(clp);
5678 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5680 struct nfs4_reclaim_complete_data *calldata = data;
5681 struct nfs_client *clp = calldata->clp;
5682 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5684 dprintk("--> %s\n", __func__);
5685 if (!nfs41_sequence_done(task, res))
5688 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5689 rpc_restart_call_prepare(task);
5692 dprintk("<-- %s\n", __func__);
5695 static void nfs4_free_reclaim_complete_data(void *data)
5697 struct nfs4_reclaim_complete_data *calldata = data;
5702 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5703 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5704 .rpc_call_done = nfs4_reclaim_complete_done,
5705 .rpc_release = nfs4_free_reclaim_complete_data,
5709 * Issue a global reclaim complete.
5711 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5713 struct nfs4_reclaim_complete_data *calldata;
5714 struct rpc_task *task;
5715 struct rpc_message msg = {
5716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5718 struct rpc_task_setup task_setup_data = {
5719 .rpc_client = clp->cl_rpcclient,
5720 .rpc_message = &msg,
5721 .callback_ops = &nfs4_reclaim_complete_call_ops,
5722 .flags = RPC_TASK_ASYNC,
5724 int status = -ENOMEM;
5726 dprintk("--> %s\n", __func__);
5727 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5728 if (calldata == NULL)
5730 calldata->clp = clp;
5731 calldata->arg.one_fs = 0;
5733 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5734 msg.rpc_argp = &calldata->arg;
5735 msg.rpc_resp = &calldata->res;
5736 task_setup_data.callback_data = calldata;
5737 task = rpc_run_task(&task_setup_data);
5739 status = PTR_ERR(task);
5742 status = nfs4_wait_for_completion_rpc_task(task);
5744 status = task->tk_status;
5748 dprintk("<-- %s status=%d\n", __func__, status);
5753 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5755 struct nfs4_layoutget *lgp = calldata;
5756 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5758 dprintk("--> %s\n", __func__);
5759 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5760 * right now covering the LAYOUTGET we are about to send.
5761 * However, that is not so catastrophic, and there seems
5762 * to be no way to prevent it completely.
5764 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5765 &lgp->res.seq_res, task))
5767 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5768 NFS_I(lgp->args.inode)->layout,
5769 lgp->args.ctx->state)) {
5770 rpc_exit(task, NFS4_OK);
5773 rpc_call_start(task);
5776 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5778 struct nfs4_layoutget *lgp = calldata;
5779 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5781 dprintk("--> %s\n", __func__);
5783 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5786 switch (task->tk_status) {
5789 case -NFS4ERR_LAYOUTTRYLATER:
5790 case -NFS4ERR_RECALLCONFLICT:
5791 task->tk_status = -NFS4ERR_DELAY;
5794 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5795 rpc_restart_call_prepare(task);
5799 dprintk("<-- %s\n", __func__);
5802 static void nfs4_layoutget_release(void *calldata)
5804 struct nfs4_layoutget *lgp = calldata;
5806 dprintk("--> %s\n", __func__);
5807 put_nfs_open_context(lgp->args.ctx);
5809 dprintk("<-- %s\n", __func__);
5812 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5813 .rpc_call_prepare = nfs4_layoutget_prepare,
5814 .rpc_call_done = nfs4_layoutget_done,
5815 .rpc_release = nfs4_layoutget_release,
5818 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5820 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5821 struct rpc_task *task;
5822 struct rpc_message msg = {
5823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5824 .rpc_argp = &lgp->args,
5825 .rpc_resp = &lgp->res,
5827 struct rpc_task_setup task_setup_data = {
5828 .rpc_client = server->client,
5829 .rpc_message = &msg,
5830 .callback_ops = &nfs4_layoutget_call_ops,
5831 .callback_data = lgp,
5832 .flags = RPC_TASK_ASYNC,
5836 dprintk("--> %s\n", __func__);
5838 lgp->res.layoutp = &lgp->args.layout;
5839 lgp->res.seq_res.sr_slot = NULL;
5840 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5841 task = rpc_run_task(&task_setup_data);
5843 return PTR_ERR(task);
5844 status = nfs4_wait_for_completion_rpc_task(task);
5846 status = task->tk_status;
5848 status = pnfs_layout_process(lgp);
5850 dprintk("<-- %s status=%d\n", __func__, status);
5855 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5857 struct nfs4_layoutreturn *lrp = calldata;
5859 dprintk("--> %s\n", __func__);
5860 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5861 &lrp->res.seq_res, task))
5863 rpc_call_start(task);
5866 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5868 struct nfs4_layoutreturn *lrp = calldata;
5869 struct nfs_server *server;
5870 struct pnfs_layout_hdr *lo = lrp->args.layout;
5872 dprintk("--> %s\n", __func__);
5874 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5877 server = NFS_SERVER(lrp->args.inode);
5878 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5879 rpc_restart_call_prepare(task);
5882 spin_lock(&lo->plh_inode->i_lock);
5883 if (task->tk_status == 0) {
5884 if (lrp->res.lrs_present) {
5885 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5887 BUG_ON(!list_empty(&lo->plh_segs));
5889 lo->plh_block_lgets--;
5890 spin_unlock(&lo->plh_inode->i_lock);
5891 dprintk("<-- %s\n", __func__);
5894 static void nfs4_layoutreturn_release(void *calldata)
5896 struct nfs4_layoutreturn *lrp = calldata;
5898 dprintk("--> %s\n", __func__);
5899 put_layout_hdr(lrp->args.layout);
5901 dprintk("<-- %s\n", __func__);
5904 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5905 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5906 .rpc_call_done = nfs4_layoutreturn_done,
5907 .rpc_release = nfs4_layoutreturn_release,
5910 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5912 struct rpc_task *task;
5913 struct rpc_message msg = {
5914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5915 .rpc_argp = &lrp->args,
5916 .rpc_resp = &lrp->res,
5918 struct rpc_task_setup task_setup_data = {
5919 .rpc_client = lrp->clp->cl_rpcclient,
5920 .rpc_message = &msg,
5921 .callback_ops = &nfs4_layoutreturn_call_ops,
5922 .callback_data = lrp,
5926 dprintk("--> %s\n", __func__);
5927 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5928 task = rpc_run_task(&task_setup_data);
5930 return PTR_ERR(task);
5931 status = task->tk_status;
5932 dprintk("<-- %s status=%d\n", __func__, status);
5938 * Retrieve the list of Data Server devices from the MDS.
5940 static int _nfs4_getdevicelist(struct nfs_server *server,
5941 const struct nfs_fh *fh,
5942 struct pnfs_devicelist *devlist)
5944 struct nfs4_getdevicelist_args args = {
5946 .layoutclass = server->pnfs_curr_ld->id,
5948 struct nfs4_getdevicelist_res res = {
5951 struct rpc_message msg = {
5952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5958 dprintk("--> %s\n", __func__);
5959 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5961 dprintk("<-- %s status=%d\n", __func__, status);
5965 int nfs4_proc_getdevicelist(struct nfs_server *server,
5966 const struct nfs_fh *fh,
5967 struct pnfs_devicelist *devlist)
5969 struct nfs4_exception exception = { };
5973 err = nfs4_handle_exception(server,
5974 _nfs4_getdevicelist(server, fh, devlist),
5976 } while (exception.retry);
5978 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5979 err, devlist->num_devs);
5983 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5986 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5988 struct nfs4_getdeviceinfo_args args = {
5991 struct nfs4_getdeviceinfo_res res = {
5994 struct rpc_message msg = {
5995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6001 dprintk("--> %s\n", __func__);
6002 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6003 dprintk("<-- %s status=%d\n", __func__, status);
6008 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6010 struct nfs4_exception exception = { };
6014 err = nfs4_handle_exception(server,
6015 _nfs4_proc_getdeviceinfo(server, pdev),
6017 } while (exception.retry);
6020 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6022 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6024 struct nfs4_layoutcommit_data *data = calldata;
6025 struct nfs_server *server = NFS_SERVER(data->args.inode);
6027 if (nfs4_setup_sequence(server, &data->args.seq_args,
6028 &data->res.seq_res, task))
6030 rpc_call_start(task);
6034 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6036 struct nfs4_layoutcommit_data *data = calldata;
6037 struct nfs_server *server = NFS_SERVER(data->args.inode);
6039 if (!nfs4_sequence_done(task, &data->res.seq_res))
6042 switch (task->tk_status) { /* Just ignore these failures */
6043 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6044 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6045 case NFS4ERR_BADLAYOUT: /* no layout */
6046 case NFS4ERR_GRACE: /* loca_recalim always false */
6047 task->tk_status = 0;
6050 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6051 rpc_restart_call_prepare(task);
6055 if (task->tk_status == 0)
6056 nfs_post_op_update_inode_force_wcc(data->args.inode,
6060 static void nfs4_layoutcommit_release(void *calldata)
6062 struct nfs4_layoutcommit_data *data = calldata;
6063 struct pnfs_layout_segment *lseg, *tmp;
6064 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6066 pnfs_cleanup_layoutcommit(data);
6067 /* Matched by references in pnfs_set_layoutcommit */
6068 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6069 list_del_init(&lseg->pls_lc_list);
6070 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6075 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6076 smp_mb__after_clear_bit();
6077 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6079 put_rpccred(data->cred);
6083 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6084 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6085 .rpc_call_done = nfs4_layoutcommit_done,
6086 .rpc_release = nfs4_layoutcommit_release,
6090 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6092 struct rpc_message msg = {
6093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6094 .rpc_argp = &data->args,
6095 .rpc_resp = &data->res,
6096 .rpc_cred = data->cred,
6098 struct rpc_task_setup task_setup_data = {
6099 .task = &data->task,
6100 .rpc_client = NFS_CLIENT(data->args.inode),
6101 .rpc_message = &msg,
6102 .callback_ops = &nfs4_layoutcommit_ops,
6103 .callback_data = data,
6104 .flags = RPC_TASK_ASYNC,
6106 struct rpc_task *task;
6109 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6110 "lbw: %llu inode %lu\n",
6111 data->task.tk_pid, sync,
6112 data->args.lastbytewritten,
6113 data->args.inode->i_ino);
6115 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6116 task = rpc_run_task(&task_setup_data);
6118 return PTR_ERR(task);
6121 status = nfs4_wait_for_completion_rpc_task(task);
6124 status = task->tk_status;
6126 dprintk("%s: status %d\n", __func__, status);
6132 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6133 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6135 struct nfs41_secinfo_no_name_args args = {
6136 .style = SECINFO_STYLE_CURRENT_FH,
6138 struct nfs4_secinfo_res res = {
6141 struct rpc_message msg = {
6142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6150 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6151 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6153 struct nfs4_exception exception = { };
6156 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6159 case -NFS4ERR_WRONGSEC:
6160 case -NFS4ERR_NOTSUPP:
6163 err = nfs4_handle_exception(server, err, &exception);
6165 } while (exception.retry);
6170 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6171 struct nfs_fsinfo *info)
6175 rpc_authflavor_t flavor;
6176 struct nfs4_secinfo_flavors *flavors;
6178 page = alloc_page(GFP_KERNEL);
6184 flavors = page_address(page);
6185 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6188 * Fall back on "guess and check" method if
6189 * the server doesn't support SECINFO_NO_NAME
6191 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6192 err = nfs4_find_root_sec(server, fhandle, info);
6198 flavor = nfs_find_best_sec(flavors);
6200 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6210 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6213 struct nfs41_test_stateid_args args = {
6216 struct nfs41_test_stateid_res res;
6217 struct rpc_message msg = {
6218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6223 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6224 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6226 if (status == NFS_OK)
6231 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6233 struct nfs4_exception exception = { };
6236 err = nfs4_handle_exception(server,
6237 _nfs41_test_stateid(server, stateid),
6239 } while (exception.retry);
6243 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6245 struct nfs41_free_stateid_args args = {
6248 struct nfs41_free_stateid_res res;
6249 struct rpc_message msg = {
6250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6255 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6256 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6259 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6261 struct nfs4_exception exception = { };
6264 err = nfs4_handle_exception(server,
6265 _nfs4_free_stateid(server, stateid),
6267 } while (exception.retry);
6271 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6272 const nfs4_stateid *s2)
6274 if (memcmp(s1->stateid.other, s2->stateid.other,
6275 sizeof(s1->stateid.other)) != 0)
6278 if (s1->stateid.seqid == s2->stateid.seqid)
6280 if (s1->stateid.seqid == 0 || s2->stateid.seqid == 0)
6286 #endif /* CONFIG_NFS_V4_1 */
6288 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6289 const nfs4_stateid *s2)
6291 return nfs4_stateid_match(s1, s2);
6295 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6296 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6297 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6298 .recover_open = nfs4_open_reclaim,
6299 .recover_lock = nfs4_lock_reclaim,
6300 .establish_clid = nfs4_init_clientid,
6301 .get_clid_cred = nfs4_get_setclientid_cred,
6304 #if defined(CONFIG_NFS_V4_1)
6305 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6306 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6307 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6308 .recover_open = nfs4_open_reclaim,
6309 .recover_lock = nfs4_lock_reclaim,
6310 .establish_clid = nfs41_init_clientid,
6311 .get_clid_cred = nfs4_get_exchange_id_cred,
6312 .reclaim_complete = nfs41_proc_reclaim_complete,
6314 #endif /* CONFIG_NFS_V4_1 */
6316 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6317 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6318 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6319 .recover_open = nfs4_open_expired,
6320 .recover_lock = nfs4_lock_expired,
6321 .establish_clid = nfs4_init_clientid,
6322 .get_clid_cred = nfs4_get_setclientid_cred,
6325 #if defined(CONFIG_NFS_V4_1)
6326 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6327 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6328 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6329 .recover_open = nfs41_open_expired,
6330 .recover_lock = nfs41_lock_expired,
6331 .establish_clid = nfs41_init_clientid,
6332 .get_clid_cred = nfs4_get_exchange_id_cred,
6334 #endif /* CONFIG_NFS_V4_1 */
6336 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6337 .sched_state_renewal = nfs4_proc_async_renew,
6338 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6339 .renew_lease = nfs4_proc_renew,
6342 #if defined(CONFIG_NFS_V4_1)
6343 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6344 .sched_state_renewal = nfs41_proc_async_sequence,
6345 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6346 .renew_lease = nfs4_proc_sequence,
6350 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6352 .call_sync = _nfs4_call_sync,
6353 .match_stateid = nfs4_match_stateid,
6354 .find_root_sec = nfs4_find_root_sec,
6355 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6356 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6357 .state_renewal_ops = &nfs40_state_renewal_ops,
6360 #if defined(CONFIG_NFS_V4_1)
6361 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6363 .call_sync = _nfs4_call_sync_session,
6364 .match_stateid = nfs41_match_stateid,
6365 .find_root_sec = nfs41_find_root_sec,
6366 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6367 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6368 .state_renewal_ops = &nfs41_state_renewal_ops,
6372 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6373 [0] = &nfs_v4_0_minor_ops,
6374 #if defined(CONFIG_NFS_V4_1)
6375 [1] = &nfs_v4_1_minor_ops,
6379 static const struct inode_operations nfs4_file_inode_operations = {
6380 .permission = nfs_permission,
6381 .getattr = nfs_getattr,
6382 .setattr = nfs_setattr,
6383 .getxattr = generic_getxattr,
6384 .setxattr = generic_setxattr,
6385 .listxattr = generic_listxattr,
6386 .removexattr = generic_removexattr,
6389 const struct nfs_rpc_ops nfs_v4_clientops = {
6390 .version = 4, /* protocol version */
6391 .dentry_ops = &nfs4_dentry_operations,
6392 .dir_inode_ops = &nfs4_dir_inode_operations,
6393 .file_inode_ops = &nfs4_file_inode_operations,
6394 .file_ops = &nfs4_file_operations,
6395 .getroot = nfs4_proc_get_root,
6396 .getattr = nfs4_proc_getattr,
6397 .setattr = nfs4_proc_setattr,
6398 .lookup = nfs4_proc_lookup,
6399 .access = nfs4_proc_access,
6400 .readlink = nfs4_proc_readlink,
6401 .create = nfs4_proc_create,
6402 .remove = nfs4_proc_remove,
6403 .unlink_setup = nfs4_proc_unlink_setup,
6404 .unlink_done = nfs4_proc_unlink_done,
6405 .rename = nfs4_proc_rename,
6406 .rename_setup = nfs4_proc_rename_setup,
6407 .rename_done = nfs4_proc_rename_done,
6408 .link = nfs4_proc_link,
6409 .symlink = nfs4_proc_symlink,
6410 .mkdir = nfs4_proc_mkdir,
6411 .rmdir = nfs4_proc_remove,
6412 .readdir = nfs4_proc_readdir,
6413 .mknod = nfs4_proc_mknod,
6414 .statfs = nfs4_proc_statfs,
6415 .fsinfo = nfs4_proc_fsinfo,
6416 .pathconf = nfs4_proc_pathconf,
6417 .set_capabilities = nfs4_server_capabilities,
6418 .decode_dirent = nfs4_decode_dirent,
6419 .read_setup = nfs4_proc_read_setup,
6420 .read_done = nfs4_read_done,
6421 .write_setup = nfs4_proc_write_setup,
6422 .write_done = nfs4_write_done,
6423 .commit_setup = nfs4_proc_commit_setup,
6424 .commit_done = nfs4_commit_done,
6425 .lock = nfs4_proc_lock,
6426 .clear_acl_cache = nfs4_zap_acl_attr,
6427 .close_context = nfs4_close_context,
6428 .open_context = nfs4_atomic_open,
6429 .init_client = nfs4_init_client,
6430 .secinfo = nfs4_proc_secinfo,
6433 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6434 .prefix = XATTR_NAME_NFSV4_ACL,
6435 .list = nfs4_xattr_list_nfs4_acl,
6436 .get = nfs4_xattr_get_nfs4_acl,
6437 .set = nfs4_xattr_set_nfs4_acl,
6440 const struct xattr_handler *nfs4_xattr_handlers[] = {
6441 &nfs4_xattr_nfs4_acl_handler,
6445 module_param(max_session_slots, ushort, 0644);
6446 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6447 "requests the client will negotiate");