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"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
74 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
79 static int _nfs4_proc_open(struct nfs4_opendata *data);
80 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
81 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
82 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
83 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
84 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
85 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
86 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
87 struct nfs_fattr *fattr, struct iattr *sattr,
88 struct nfs4_state *state);
89 #ifdef CONFIG_NFS_V4_1
90 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
93 /* Prevent leaks of NFSv4 errors into userland */
94 static int nfs4_map_errors(int err)
99 case -NFS4ERR_RESOURCE:
101 case -NFS4ERR_WRONGSEC:
103 case -NFS4ERR_BADOWNER:
104 case -NFS4ERR_BADNAME:
107 dprintk("%s could not handle NFSv4 error %d\n",
115 * This is our standard bitmap for GETATTR requests.
117 const u32 nfs4_fattr_bitmap[2] = {
119 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_FILEID,
124 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER_GROUP
127 | FATTR4_WORD1_RAWDEV
128 | FATTR4_WORD1_SPACE_USED
129 | FATTR4_WORD1_TIME_ACCESS
130 | FATTR4_WORD1_TIME_METADATA
131 | FATTR4_WORD1_TIME_MODIFY
134 const u32 nfs4_statfs_bitmap[2] = {
135 FATTR4_WORD0_FILES_AVAIL
136 | FATTR4_WORD0_FILES_FREE
137 | FATTR4_WORD0_FILES_TOTAL,
138 FATTR4_WORD1_SPACE_AVAIL
139 | FATTR4_WORD1_SPACE_FREE
140 | FATTR4_WORD1_SPACE_TOTAL
143 const u32 nfs4_pathconf_bitmap[2] = {
145 | FATTR4_WORD0_MAXNAME,
149 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
150 | FATTR4_WORD0_MAXREAD
151 | FATTR4_WORD0_MAXWRITE
152 | FATTR4_WORD0_LEASE_TIME,
153 FATTR4_WORD1_TIME_DELTA
154 | FATTR4_WORD1_FS_LAYOUT_TYPES,
155 FATTR4_WORD2_LAYOUT_BLKSIZE
158 const u32 nfs4_fs_locations_bitmap[2] = {
160 | FATTR4_WORD0_CHANGE
163 | FATTR4_WORD0_FILEID
164 | FATTR4_WORD0_FS_LOCATIONS,
166 | FATTR4_WORD1_NUMLINKS
168 | FATTR4_WORD1_OWNER_GROUP
169 | FATTR4_WORD1_RAWDEV
170 | FATTR4_WORD1_SPACE_USED
171 | FATTR4_WORD1_TIME_ACCESS
172 | FATTR4_WORD1_TIME_METADATA
173 | FATTR4_WORD1_TIME_MODIFY
174 | FATTR4_WORD1_MOUNTED_ON_FILEID
177 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
178 struct nfs4_readdir_arg *readdir)
182 BUG_ON(readdir->count < 80);
184 readdir->cookie = cookie;
185 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
190 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
195 * NFSv4 servers do not return entries for '.' and '..'
196 * Therefore, we fake these entries here. We let '.'
197 * have cookie 0 and '..' have cookie 1. Note that
198 * when talking to the server, we always send cookie 0
201 start = p = kmap_atomic(*readdir->pages);
204 *p++ = xdr_one; /* next */
205 *p++ = xdr_zero; /* cookie, first word */
206 *p++ = xdr_one; /* cookie, second word */
207 *p++ = xdr_one; /* entry len */
208 memcpy(p, ".\0\0\0", 4); /* entry */
210 *p++ = xdr_one; /* bitmap length */
211 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
212 *p++ = htonl(8); /* attribute buffer length */
213 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
216 *p++ = xdr_one; /* next */
217 *p++ = xdr_zero; /* cookie, first word */
218 *p++ = xdr_two; /* cookie, second word */
219 *p++ = xdr_two; /* entry len */
220 memcpy(p, "..\0\0", 4); /* entry */
222 *p++ = xdr_one; /* bitmap length */
223 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
224 *p++ = htonl(8); /* attribute buffer length */
225 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
227 readdir->pgbase = (char *)p - (char *)start;
228 readdir->count -= readdir->pgbase;
229 kunmap_atomic(start);
232 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
238 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
239 nfs_wait_bit_killable, TASK_KILLABLE);
243 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
250 *timeout = NFS4_POLL_RETRY_MIN;
251 if (*timeout > NFS4_POLL_RETRY_MAX)
252 *timeout = NFS4_POLL_RETRY_MAX;
253 freezable_schedule_timeout_killable(*timeout);
254 if (fatal_signal_pending(current))
260 /* This is the error handling routine for processes that are allowed
263 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
265 struct nfs_client *clp = server->nfs_client;
266 struct nfs4_state *state = exception->state;
267 struct inode *inode = exception->inode;
270 exception->retry = 0;
274 case -NFS4ERR_OPENMODE:
275 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
276 nfs_inode_return_delegation(inode);
277 exception->retry = 1;
282 nfs4_schedule_stateid_recovery(server, state);
283 goto wait_on_recovery;
284 case -NFS4ERR_DELEG_REVOKED:
285 case -NFS4ERR_ADMIN_REVOKED:
286 case -NFS4ERR_BAD_STATEID:
289 nfs_remove_bad_delegation(state->inode);
290 nfs4_schedule_stateid_recovery(server, state);
291 goto wait_on_recovery;
292 case -NFS4ERR_EXPIRED:
294 nfs4_schedule_stateid_recovery(server, state);
295 case -NFS4ERR_STALE_STATEID:
296 case -NFS4ERR_STALE_CLIENTID:
297 nfs4_schedule_lease_recovery(clp);
298 goto wait_on_recovery;
299 #if defined(CONFIG_NFS_V4_1)
300 case -NFS4ERR_BADSESSION:
301 case -NFS4ERR_BADSLOT:
302 case -NFS4ERR_BAD_HIGH_SLOT:
303 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
304 case -NFS4ERR_DEADSESSION:
305 case -NFS4ERR_SEQ_FALSE_RETRY:
306 case -NFS4ERR_SEQ_MISORDERED:
307 dprintk("%s ERROR: %d Reset session\n", __func__,
309 nfs4_schedule_session_recovery(clp->cl_session);
310 exception->retry = 1;
312 #endif /* defined(CONFIG_NFS_V4_1) */
313 case -NFS4ERR_FILE_OPEN:
314 if (exception->timeout > HZ) {
315 /* We have retried a decent amount, time to
324 ret = nfs4_delay(server->client, &exception->timeout);
327 case -NFS4ERR_RETRY_UNCACHED_REP:
328 case -NFS4ERR_OLD_STATEID:
329 exception->retry = 1;
331 case -NFS4ERR_BADOWNER:
332 /* The following works around a Linux server bug! */
333 case -NFS4ERR_BADNAME:
334 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
335 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
336 exception->retry = 1;
337 printk(KERN_WARNING "NFS: v4 server %s "
338 "does not accept raw "
340 "Reenabling the idmapper.\n",
341 server->nfs_client->cl_hostname);
344 /* We failed to handle the error */
345 return nfs4_map_errors(ret);
347 ret = nfs4_wait_clnt_recover(clp);
349 exception->retry = 1;
354 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
356 spin_lock(&clp->cl_lock);
357 if (time_before(clp->cl_last_renewal,timestamp))
358 clp->cl_last_renewal = timestamp;
359 spin_unlock(&clp->cl_lock);
362 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
364 do_renew_lease(server->nfs_client, timestamp);
367 #if defined(CONFIG_NFS_V4_1)
370 * nfs4_free_slot - free a slot and efficiently update slot table.
372 * freeing a slot is trivially done by clearing its respective bit
374 * If the freed slotid equals highest_used_slotid we want to update it
375 * so that the server would be able to size down the slot table if needed,
376 * otherwise we know that the highest_used_slotid is still in use.
377 * When updating highest_used_slotid there may be "holes" in the bitmap
378 * so we need to scan down from highest_used_slotid to 0 looking for the now
379 * highest slotid in use.
380 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
382 * Must be called while holding tbl->slot_tbl_lock
385 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
387 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
388 /* clear used bit in bitmap */
389 __clear_bit(slotid, tbl->used_slots);
391 /* update highest_used_slotid when it is freed */
392 if (slotid == tbl->highest_used_slotid) {
393 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
394 if (slotid < tbl->max_slots)
395 tbl->highest_used_slotid = slotid;
397 tbl->highest_used_slotid = NFS4_NO_SLOT;
399 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
400 slotid, tbl->highest_used_slotid);
403 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
405 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
410 * Signal state manager thread if session fore channel is drained
412 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
414 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
415 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
416 nfs4_set_task_privileged, NULL);
420 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
423 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
424 complete(&ses->fc_slot_table.complete);
428 * Signal state manager thread if session back channel is drained
430 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
432 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
433 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
435 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
436 complete(&ses->bc_slot_table.complete);
439 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
441 struct nfs4_slot_table *tbl;
443 tbl = &res->sr_session->fc_slot_table;
445 /* just wake up the next guy waiting since
446 * we may have not consumed a slot after all */
447 dprintk("%s: No slot\n", __func__);
451 spin_lock(&tbl->slot_tbl_lock);
452 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
453 nfs4_check_drain_fc_complete(res->sr_session);
454 spin_unlock(&tbl->slot_tbl_lock);
458 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
460 unsigned long timestamp;
461 struct nfs_client *clp;
464 * sr_status remains 1 if an RPC level error occurred. The server
465 * may or may not have processed the sequence operation..
466 * Proceed as if the server received and processed the sequence
469 if (res->sr_status == 1)
470 res->sr_status = NFS_OK;
472 /* don't increment the sequence number if the task wasn't sent */
473 if (!RPC_WAS_SENT(task))
476 /* Check the SEQUENCE operation status */
477 switch (res->sr_status) {
479 /* Update the slot's sequence and clientid lease timer */
480 ++res->sr_slot->seq_nr;
481 timestamp = res->sr_renewal_time;
482 clp = res->sr_session->clp;
483 do_renew_lease(clp, timestamp);
484 /* Check sequence flags */
485 if (res->sr_status_flags != 0)
486 nfs4_schedule_lease_recovery(clp);
489 /* The server detected a resend of the RPC call and
490 * returned NFS4ERR_DELAY as per Section 2.10.6.2
493 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
495 res->sr_slot - res->sr_session->fc_slot_table.slots,
496 res->sr_slot->seq_nr);
499 /* Just update the slot sequence no. */
500 ++res->sr_slot->seq_nr;
503 /* The session may be reset by one of the error handlers. */
504 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
505 nfs41_sequence_free_slot(res);
508 if (!rpc_restart_call(task))
510 rpc_delay(task, NFS4_POLL_RETRY_MAX);
514 static int nfs4_sequence_done(struct rpc_task *task,
515 struct nfs4_sequence_res *res)
517 if (res->sr_session == NULL)
519 return nfs41_sequence_done(task, res);
523 * nfs4_find_slot - efficiently look for a free slot
525 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
526 * If found, we mark the slot as used, update the highest_used_slotid,
527 * and respectively set up the sequence operation args.
528 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
530 * Note: must be called with under the slot_tbl_lock.
533 nfs4_find_slot(struct nfs4_slot_table *tbl)
536 u32 ret_id = NFS4_NO_SLOT;
538 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
539 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
541 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
542 if (slotid >= tbl->max_slots)
544 __set_bit(slotid, tbl->used_slots);
545 if (slotid > tbl->highest_used_slotid ||
546 tbl->highest_used_slotid == NFS4_NO_SLOT)
547 tbl->highest_used_slotid = slotid;
550 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
551 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
555 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res, int cache_reply)
558 args->sa_session = NULL;
559 args->sa_cache_this = 0;
561 args->sa_cache_this = 1;
562 res->sr_session = NULL;
566 int nfs41_setup_sequence(struct nfs4_session *session,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 struct rpc_task *task)
571 struct nfs4_slot *slot;
572 struct nfs4_slot_table *tbl;
575 dprintk("--> %s\n", __func__);
576 /* slot already allocated? */
577 if (res->sr_slot != NULL)
580 tbl = &session->fc_slot_table;
582 spin_lock(&tbl->slot_tbl_lock);
583 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
584 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
585 /* The state manager will wait until the slot table is empty */
586 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
587 spin_unlock(&tbl->slot_tbl_lock);
588 dprintk("%s session is draining\n", __func__);
592 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
593 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
594 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
595 spin_unlock(&tbl->slot_tbl_lock);
596 dprintk("%s enforce FIFO order\n", __func__);
600 slotid = nfs4_find_slot(tbl);
601 if (slotid == NFS4_NO_SLOT) {
602 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
603 spin_unlock(&tbl->slot_tbl_lock);
604 dprintk("<-- %s: no free slots\n", __func__);
607 spin_unlock(&tbl->slot_tbl_lock);
609 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
610 slot = tbl->slots + slotid;
611 args->sa_session = session;
612 args->sa_slotid = slotid;
614 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
616 res->sr_session = session;
618 res->sr_renewal_time = jiffies;
619 res->sr_status_flags = 0;
621 * sr_status is only set in decode_sequence, and so will remain
622 * set to 1 if an rpc level failure occurs.
627 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
629 int nfs4_setup_sequence(const struct nfs_server *server,
630 struct nfs4_sequence_args *args,
631 struct nfs4_sequence_res *res,
632 struct rpc_task *task)
634 struct nfs4_session *session = nfs4_get_session(server);
640 dprintk("--> %s clp %p session %p sr_slot %td\n",
641 __func__, session->clp, session, res->sr_slot ?
642 res->sr_slot - session->fc_slot_table.slots : -1);
644 ret = nfs41_setup_sequence(session, args, res, task);
646 dprintk("<-- %s status=%d\n", __func__, ret);
650 struct nfs41_call_sync_data {
651 const struct nfs_server *seq_server;
652 struct nfs4_sequence_args *seq_args;
653 struct nfs4_sequence_res *seq_res;
656 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
658 struct nfs41_call_sync_data *data = calldata;
660 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
662 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
663 data->seq_res, task))
665 rpc_call_start(task);
668 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
670 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
671 nfs41_call_sync_prepare(task, calldata);
674 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
676 struct nfs41_call_sync_data *data = calldata;
678 nfs41_sequence_done(task, data->seq_res);
681 static const struct rpc_call_ops nfs41_call_sync_ops = {
682 .rpc_call_prepare = nfs41_call_sync_prepare,
683 .rpc_call_done = nfs41_call_sync_done,
686 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
687 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
688 .rpc_call_done = nfs41_call_sync_done,
691 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
692 struct nfs_server *server,
693 struct rpc_message *msg,
694 struct nfs4_sequence_args *args,
695 struct nfs4_sequence_res *res,
699 struct rpc_task *task;
700 struct nfs41_call_sync_data data = {
701 .seq_server = server,
705 struct rpc_task_setup task_setup = {
708 .callback_ops = &nfs41_call_sync_ops,
709 .callback_data = &data
713 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
714 task = rpc_run_task(&task_setup);
718 ret = task->tk_status;
724 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
725 struct nfs_server *server,
726 struct rpc_message *msg,
727 struct nfs4_sequence_args *args,
728 struct nfs4_sequence_res *res,
731 nfs41_init_sequence(args, res, cache_reply);
732 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
737 void nfs41_init_sequence(struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res, int cache_reply)
742 static int nfs4_sequence_done(struct rpc_task *task,
743 struct nfs4_sequence_res *res)
747 #endif /* CONFIG_NFS_V4_1 */
749 int _nfs4_call_sync(struct rpc_clnt *clnt,
750 struct nfs_server *server,
751 struct rpc_message *msg,
752 struct nfs4_sequence_args *args,
753 struct nfs4_sequence_res *res,
756 nfs41_init_sequence(args, res, cache_reply);
757 return rpc_call_sync(clnt, msg, 0);
761 int nfs4_call_sync(struct rpc_clnt *clnt,
762 struct nfs_server *server,
763 struct rpc_message *msg,
764 struct nfs4_sequence_args *args,
765 struct nfs4_sequence_res *res,
768 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
769 args, res, cache_reply);
772 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
774 struct nfs_inode *nfsi = NFS_I(dir);
776 spin_lock(&dir->i_lock);
777 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
778 if (!cinfo->atomic || cinfo->before != dir->i_version)
779 nfs_force_lookup_revalidate(dir);
780 dir->i_version = cinfo->after;
781 spin_unlock(&dir->i_lock);
784 struct nfs4_opendata {
786 struct nfs_openargs o_arg;
787 struct nfs_openres o_res;
788 struct nfs_open_confirmargs c_arg;
789 struct nfs_open_confirmres c_res;
790 struct nfs4_string owner_name;
791 struct nfs4_string group_name;
792 struct nfs_fattr f_attr;
794 struct dentry *dentry;
795 struct nfs4_state_owner *owner;
796 struct nfs4_state *state;
798 unsigned long timestamp;
799 unsigned int rpc_done : 1;
805 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
807 p->o_res.f_attr = &p->f_attr;
808 p->o_res.seqid = p->o_arg.seqid;
809 p->c_res.seqid = p->c_arg.seqid;
810 p->o_res.server = p->o_arg.server;
811 nfs_fattr_init(&p->f_attr);
812 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
815 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
816 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
817 const struct iattr *attrs,
820 struct dentry *parent = dget_parent(dentry);
821 struct inode *dir = parent->d_inode;
822 struct nfs_server *server = NFS_SERVER(dir);
823 struct nfs4_opendata *p;
825 p = kzalloc(sizeof(*p), gfp_mask);
828 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
829 if (p->o_arg.seqid == NULL)
831 nfs_sb_active(dentry->d_sb);
832 p->dentry = dget(dentry);
835 atomic_inc(&sp->so_count);
836 p->o_arg.fh = NFS_FH(dir);
837 p->o_arg.open_flags = flags;
838 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
839 p->o_arg.clientid = server->nfs_client->cl_clientid;
840 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
841 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
842 p->o_arg.name = &dentry->d_name;
843 p->o_arg.server = server;
844 p->o_arg.bitmask = server->attr_bitmask;
845 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
846 if (attrs != NULL && attrs->ia_valid != 0) {
849 p->o_arg.u.attrs = &p->attrs;
850 memcpy(&p->attrs, attrs, sizeof(p->attrs));
853 verf[1] = current->pid;
854 memcpy(p->o_arg.u.verifier.data, verf,
855 sizeof(p->o_arg.u.verifier.data));
857 p->c_arg.fh = &p->o_res.fh;
858 p->c_arg.stateid = &p->o_res.stateid;
859 p->c_arg.seqid = p->o_arg.seqid;
860 nfs4_init_opendata_res(p);
870 static void nfs4_opendata_free(struct kref *kref)
872 struct nfs4_opendata *p = container_of(kref,
873 struct nfs4_opendata, kref);
874 struct super_block *sb = p->dentry->d_sb;
876 nfs_free_seqid(p->o_arg.seqid);
877 if (p->state != NULL)
878 nfs4_put_open_state(p->state);
879 nfs4_put_state_owner(p->owner);
883 nfs_fattr_free_names(&p->f_attr);
887 static void nfs4_opendata_put(struct nfs4_opendata *p)
890 kref_put(&p->kref, nfs4_opendata_free);
893 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
897 ret = rpc_wait_for_completion_task(task);
901 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
905 if (open_mode & (O_EXCL|O_TRUNC))
907 switch (mode & (FMODE_READ|FMODE_WRITE)) {
909 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
910 && state->n_rdonly != 0;
913 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
914 && state->n_wronly != 0;
916 case FMODE_READ|FMODE_WRITE:
917 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
918 && state->n_rdwr != 0;
924 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
926 if (delegation == NULL)
928 if ((delegation->type & fmode) != fmode)
930 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
932 nfs_mark_delegation_referenced(delegation);
936 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
945 case FMODE_READ|FMODE_WRITE:
948 nfs4_state_set_mode_locked(state, state->state | fmode);
951 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
953 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
954 nfs4_stateid_copy(&state->stateid, stateid);
955 nfs4_stateid_copy(&state->open_stateid, stateid);
958 set_bit(NFS_O_RDONLY_STATE, &state->flags);
961 set_bit(NFS_O_WRONLY_STATE, &state->flags);
963 case FMODE_READ|FMODE_WRITE:
964 set_bit(NFS_O_RDWR_STATE, &state->flags);
968 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
970 write_seqlock(&state->seqlock);
971 nfs_set_open_stateid_locked(state, stateid, fmode);
972 write_sequnlock(&state->seqlock);
975 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
978 * Protect the call to nfs4_state_set_mode_locked and
979 * serialise the stateid update
981 write_seqlock(&state->seqlock);
982 if (deleg_stateid != NULL) {
983 nfs4_stateid_copy(&state->stateid, deleg_stateid);
984 set_bit(NFS_DELEGATED_STATE, &state->flags);
986 if (open_stateid != NULL)
987 nfs_set_open_stateid_locked(state, open_stateid, fmode);
988 write_sequnlock(&state->seqlock);
989 spin_lock(&state->owner->so_lock);
990 update_open_stateflags(state, fmode);
991 spin_unlock(&state->owner->so_lock);
994 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
996 struct nfs_inode *nfsi = NFS_I(state->inode);
997 struct nfs_delegation *deleg_cur;
1000 fmode &= (FMODE_READ|FMODE_WRITE);
1003 deleg_cur = rcu_dereference(nfsi->delegation);
1004 if (deleg_cur == NULL)
1007 spin_lock(&deleg_cur->lock);
1008 if (nfsi->delegation != deleg_cur ||
1009 (deleg_cur->type & fmode) != fmode)
1010 goto no_delegation_unlock;
1012 if (delegation == NULL)
1013 delegation = &deleg_cur->stateid;
1014 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1015 goto no_delegation_unlock;
1017 nfs_mark_delegation_referenced(deleg_cur);
1018 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1020 no_delegation_unlock:
1021 spin_unlock(&deleg_cur->lock);
1025 if (!ret && open_stateid != NULL) {
1026 __update_open_stateid(state, open_stateid, NULL, fmode);
1034 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1036 struct nfs_delegation *delegation;
1039 delegation = rcu_dereference(NFS_I(inode)->delegation);
1040 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1045 nfs_inode_return_delegation(inode);
1048 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1050 struct nfs4_state *state = opendata->state;
1051 struct nfs_inode *nfsi = NFS_I(state->inode);
1052 struct nfs_delegation *delegation;
1053 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1054 fmode_t fmode = opendata->o_arg.fmode;
1055 nfs4_stateid stateid;
1059 if (can_open_cached(state, fmode, open_mode)) {
1060 spin_lock(&state->owner->so_lock);
1061 if (can_open_cached(state, fmode, open_mode)) {
1062 update_open_stateflags(state, fmode);
1063 spin_unlock(&state->owner->so_lock);
1064 goto out_return_state;
1066 spin_unlock(&state->owner->so_lock);
1069 delegation = rcu_dereference(nfsi->delegation);
1070 if (!can_open_delegated(delegation, fmode)) {
1074 /* Save the delegation */
1075 nfs4_stateid_copy(&stateid, &delegation->stateid);
1077 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1082 /* Try to update the stateid using the delegation */
1083 if (update_open_stateid(state, NULL, &stateid, fmode))
1084 goto out_return_state;
1087 return ERR_PTR(ret);
1089 atomic_inc(&state->count);
1093 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1095 struct inode *inode;
1096 struct nfs4_state *state = NULL;
1097 struct nfs_delegation *delegation;
1100 if (!data->rpc_done) {
1101 state = nfs4_try_open_cached(data);
1106 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1108 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1109 ret = PTR_ERR(inode);
1113 state = nfs4_get_open_state(inode, data->owner);
1116 if (data->o_res.delegation_type != 0) {
1117 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1118 int delegation_flags = 0;
1121 delegation = rcu_dereference(NFS_I(inode)->delegation);
1123 delegation_flags = delegation->flags;
1125 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1126 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1127 "returning a delegation for "
1128 "OPEN(CLAIM_DELEGATE_CUR)\n",
1130 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1131 nfs_inode_set_delegation(state->inode,
1132 data->owner->so_cred,
1135 nfs_inode_reclaim_delegation(state->inode,
1136 data->owner->so_cred,
1140 update_open_stateid(state, &data->o_res.stateid, NULL,
1148 return ERR_PTR(ret);
1151 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1153 struct nfs_inode *nfsi = NFS_I(state->inode);
1154 struct nfs_open_context *ctx;
1156 spin_lock(&state->inode->i_lock);
1157 list_for_each_entry(ctx, &nfsi->open_files, list) {
1158 if (ctx->state != state)
1160 get_nfs_open_context(ctx);
1161 spin_unlock(&state->inode->i_lock);
1164 spin_unlock(&state->inode->i_lock);
1165 return ERR_PTR(-ENOENT);
1168 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1170 struct nfs4_opendata *opendata;
1172 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1173 if (opendata == NULL)
1174 return ERR_PTR(-ENOMEM);
1175 opendata->state = state;
1176 atomic_inc(&state->count);
1180 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1182 struct nfs4_state *newstate;
1185 opendata->o_arg.open_flags = 0;
1186 opendata->o_arg.fmode = fmode;
1187 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1188 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1189 nfs4_init_opendata_res(opendata);
1190 ret = _nfs4_recover_proc_open(opendata);
1193 newstate = nfs4_opendata_to_nfs4_state(opendata);
1194 if (IS_ERR(newstate))
1195 return PTR_ERR(newstate);
1196 nfs4_close_state(newstate, fmode);
1201 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1203 struct nfs4_state *newstate;
1206 /* memory barrier prior to reading state->n_* */
1207 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1209 if (state->n_rdwr != 0) {
1210 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1211 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1214 if (newstate != state)
1217 if (state->n_wronly != 0) {
1218 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1219 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1222 if (newstate != state)
1225 if (state->n_rdonly != 0) {
1226 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1227 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1230 if (newstate != state)
1234 * We may have performed cached opens for all three recoveries.
1235 * Check if we need to update the current stateid.
1237 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1238 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1239 write_seqlock(&state->seqlock);
1240 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1241 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1242 write_sequnlock(&state->seqlock);
1249 * reclaim state on the server after a reboot.
1251 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1253 struct nfs_delegation *delegation;
1254 struct nfs4_opendata *opendata;
1255 fmode_t delegation_type = 0;
1258 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1259 if (IS_ERR(opendata))
1260 return PTR_ERR(opendata);
1261 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1262 opendata->o_arg.fh = NFS_FH(state->inode);
1264 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1265 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1266 delegation_type = delegation->type;
1268 opendata->o_arg.u.delegation_type = delegation_type;
1269 status = nfs4_open_recover(opendata, state);
1270 nfs4_opendata_put(opendata);
1274 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1276 struct nfs_server *server = NFS_SERVER(state->inode);
1277 struct nfs4_exception exception = { };
1280 err = _nfs4_do_open_reclaim(ctx, state);
1281 if (err != -NFS4ERR_DELAY)
1283 nfs4_handle_exception(server, err, &exception);
1284 } while (exception.retry);
1288 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1290 struct nfs_open_context *ctx;
1293 ctx = nfs4_state_find_open_context(state);
1295 return PTR_ERR(ctx);
1296 ret = nfs4_do_open_reclaim(ctx, state);
1297 put_nfs_open_context(ctx);
1301 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1303 struct nfs4_opendata *opendata;
1306 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1307 if (IS_ERR(opendata))
1308 return PTR_ERR(opendata);
1309 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1310 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1311 ret = nfs4_open_recover(opendata, state);
1312 nfs4_opendata_put(opendata);
1316 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1318 struct nfs4_exception exception = { };
1319 struct nfs_server *server = NFS_SERVER(state->inode);
1322 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1328 case -NFS4ERR_BADSESSION:
1329 case -NFS4ERR_BADSLOT:
1330 case -NFS4ERR_BAD_HIGH_SLOT:
1331 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1332 case -NFS4ERR_DEADSESSION:
1333 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1335 case -NFS4ERR_STALE_CLIENTID:
1336 case -NFS4ERR_STALE_STATEID:
1337 case -NFS4ERR_EXPIRED:
1338 /* Don't recall a delegation if it was lost */
1339 nfs4_schedule_lease_recovery(server->nfs_client);
1343 * The show must go on: exit, but mark the
1344 * stateid as needing recovery.
1346 case -NFS4ERR_DELEG_REVOKED:
1347 case -NFS4ERR_ADMIN_REVOKED:
1348 case -NFS4ERR_BAD_STATEID:
1349 nfs_inode_find_state_and_recover(state->inode,
1351 nfs4_schedule_stateid_recovery(server, state);
1354 * User RPCSEC_GSS context has expired.
1355 * We cannot recover this stateid now, so
1356 * skip it and allow recovery thread to
1363 err = nfs4_handle_exception(server, err, &exception);
1364 } while (exception.retry);
1369 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1371 struct nfs4_opendata *data = calldata;
1373 data->rpc_status = task->tk_status;
1374 if (data->rpc_status == 0) {
1375 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1376 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1377 renew_lease(data->o_res.server, data->timestamp);
1382 static void nfs4_open_confirm_release(void *calldata)
1384 struct nfs4_opendata *data = calldata;
1385 struct nfs4_state *state = NULL;
1387 /* If this request hasn't been cancelled, do nothing */
1388 if (data->cancelled == 0)
1390 /* In case of error, no cleanup! */
1391 if (!data->rpc_done)
1393 state = nfs4_opendata_to_nfs4_state(data);
1395 nfs4_close_state(state, data->o_arg.fmode);
1397 nfs4_opendata_put(data);
1400 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1401 .rpc_call_done = nfs4_open_confirm_done,
1402 .rpc_release = nfs4_open_confirm_release,
1406 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1408 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1410 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1411 struct rpc_task *task;
1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1414 .rpc_argp = &data->c_arg,
1415 .rpc_resp = &data->c_res,
1416 .rpc_cred = data->owner->so_cred,
1418 struct rpc_task_setup task_setup_data = {
1419 .rpc_client = server->client,
1420 .rpc_message = &msg,
1421 .callback_ops = &nfs4_open_confirm_ops,
1422 .callback_data = data,
1423 .workqueue = nfsiod_workqueue,
1424 .flags = RPC_TASK_ASYNC,
1428 kref_get(&data->kref);
1430 data->rpc_status = 0;
1431 data->timestamp = jiffies;
1432 task = rpc_run_task(&task_setup_data);
1434 return PTR_ERR(task);
1435 status = nfs4_wait_for_completion_rpc_task(task);
1437 data->cancelled = 1;
1440 status = data->rpc_status;
1445 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1447 struct nfs4_opendata *data = calldata;
1448 struct nfs4_state_owner *sp = data->owner;
1450 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1453 * Check if we still need to send an OPEN call, or if we can use
1454 * a delegation instead.
1456 if (data->state != NULL) {
1457 struct nfs_delegation *delegation;
1459 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1462 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1463 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1464 can_open_delegated(delegation, data->o_arg.fmode))
1465 goto unlock_no_action;
1468 /* Update client id. */
1469 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1470 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1471 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1472 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1474 data->timestamp = jiffies;
1475 if (nfs4_setup_sequence(data->o_arg.server,
1476 &data->o_arg.seq_args,
1477 &data->o_res.seq_res, task))
1479 rpc_call_start(task);
1484 task->tk_action = NULL;
1488 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1490 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1491 nfs4_open_prepare(task, calldata);
1494 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1496 struct nfs4_opendata *data = calldata;
1498 data->rpc_status = task->tk_status;
1500 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1503 if (task->tk_status == 0) {
1504 switch (data->o_res.f_attr->mode & S_IFMT) {
1508 data->rpc_status = -ELOOP;
1511 data->rpc_status = -EISDIR;
1514 data->rpc_status = -ENOTDIR;
1516 renew_lease(data->o_res.server, data->timestamp);
1517 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1518 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1523 static void nfs4_open_release(void *calldata)
1525 struct nfs4_opendata *data = calldata;
1526 struct nfs4_state *state = NULL;
1528 /* If this request hasn't been cancelled, do nothing */
1529 if (data->cancelled == 0)
1531 /* In case of error, no cleanup! */
1532 if (data->rpc_status != 0 || !data->rpc_done)
1534 /* In case we need an open_confirm, no cleanup! */
1535 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1537 state = nfs4_opendata_to_nfs4_state(data);
1539 nfs4_close_state(state, data->o_arg.fmode);
1541 nfs4_opendata_put(data);
1544 static const struct rpc_call_ops nfs4_open_ops = {
1545 .rpc_call_prepare = nfs4_open_prepare,
1546 .rpc_call_done = nfs4_open_done,
1547 .rpc_release = nfs4_open_release,
1550 static const struct rpc_call_ops nfs4_recover_open_ops = {
1551 .rpc_call_prepare = nfs4_recover_open_prepare,
1552 .rpc_call_done = nfs4_open_done,
1553 .rpc_release = nfs4_open_release,
1556 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1558 struct inode *dir = data->dir->d_inode;
1559 struct nfs_server *server = NFS_SERVER(dir);
1560 struct nfs_openargs *o_arg = &data->o_arg;
1561 struct nfs_openres *o_res = &data->o_res;
1562 struct rpc_task *task;
1563 struct rpc_message msg = {
1564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1567 .rpc_cred = data->owner->so_cred,
1569 struct rpc_task_setup task_setup_data = {
1570 .rpc_client = server->client,
1571 .rpc_message = &msg,
1572 .callback_ops = &nfs4_open_ops,
1573 .callback_data = data,
1574 .workqueue = nfsiod_workqueue,
1575 .flags = RPC_TASK_ASYNC,
1579 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1580 kref_get(&data->kref);
1582 data->rpc_status = 0;
1583 data->cancelled = 0;
1585 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1586 task = rpc_run_task(&task_setup_data);
1588 return PTR_ERR(task);
1589 status = nfs4_wait_for_completion_rpc_task(task);
1591 data->cancelled = 1;
1594 status = data->rpc_status;
1600 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1602 struct inode *dir = data->dir->d_inode;
1603 struct nfs_openres *o_res = &data->o_res;
1606 status = nfs4_run_open_task(data, 1);
1607 if (status != 0 || !data->rpc_done)
1610 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1612 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1613 status = _nfs4_proc_open_confirm(data);
1622 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1624 static int _nfs4_proc_open(struct nfs4_opendata *data)
1626 struct inode *dir = data->dir->d_inode;
1627 struct nfs_server *server = NFS_SERVER(dir);
1628 struct nfs_openargs *o_arg = &data->o_arg;
1629 struct nfs_openres *o_res = &data->o_res;
1632 status = nfs4_run_open_task(data, 0);
1633 if (!data->rpc_done)
1636 if (status == -NFS4ERR_BADNAME &&
1637 !(o_arg->open_flags & O_CREAT))
1642 nfs_fattr_map_and_free_names(server, &data->f_attr);
1644 if (o_arg->open_flags & O_CREAT)
1645 update_changeattr(dir, &o_res->cinfo);
1646 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1647 server->caps &= ~NFS_CAP_POSIX_LOCK;
1648 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1649 status = _nfs4_proc_open_confirm(data);
1653 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1654 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1658 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1663 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1664 ret = nfs4_wait_clnt_recover(clp);
1667 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1668 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1670 nfs4_schedule_state_manager(clp);
1676 static int nfs4_recover_expired_lease(struct nfs_server *server)
1678 return nfs4_client_recover_expired_lease(server->nfs_client);
1683 * reclaim state on the server after a network partition.
1684 * Assumes caller holds the appropriate lock
1686 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1688 struct nfs4_opendata *opendata;
1691 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1692 if (IS_ERR(opendata))
1693 return PTR_ERR(opendata);
1694 ret = nfs4_open_recover(opendata, state);
1696 d_drop(ctx->dentry);
1697 nfs4_opendata_put(opendata);
1701 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1703 struct nfs_server *server = NFS_SERVER(state->inode);
1704 struct nfs4_exception exception = { };
1708 err = _nfs4_open_expired(ctx, state);
1712 case -NFS4ERR_GRACE:
1713 case -NFS4ERR_DELAY:
1714 nfs4_handle_exception(server, err, &exception);
1717 } while (exception.retry);
1722 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1724 struct nfs_open_context *ctx;
1727 ctx = nfs4_state_find_open_context(state);
1729 return PTR_ERR(ctx);
1730 ret = nfs4_do_open_expired(ctx, state);
1731 put_nfs_open_context(ctx);
1735 #if defined(CONFIG_NFS_V4_1)
1736 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1738 int status = NFS_OK;
1739 struct nfs_server *server = NFS_SERVER(state->inode);
1741 if (state->flags & flags) {
1742 status = nfs41_test_stateid(server, stateid);
1743 if (status != NFS_OK) {
1744 nfs41_free_stateid(server, stateid);
1745 state->flags &= ~flags;
1751 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1753 int deleg_status, open_status;
1754 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1755 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1757 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1758 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1760 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1762 return nfs4_open_expired(sp, state);
1767 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1768 * fields corresponding to attributes that were used to store the verifier.
1769 * Make sure we clobber those fields in the later setattr call
1771 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1773 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1774 !(sattr->ia_valid & ATTR_ATIME_SET))
1775 sattr->ia_valid |= ATTR_ATIME;
1777 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1778 !(sattr->ia_valid & ATTR_MTIME_SET))
1779 sattr->ia_valid |= ATTR_MTIME;
1783 * Returns a referenced nfs4_state
1785 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)
1787 struct nfs4_state_owner *sp;
1788 struct nfs4_state *state = NULL;
1789 struct nfs_server *server = NFS_SERVER(dir);
1790 struct nfs4_opendata *opendata;
1793 /* Protect against reboot recovery conflicts */
1795 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1797 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1800 status = nfs4_recover_expired_lease(server);
1802 goto err_put_state_owner;
1803 if (dentry->d_inode != NULL)
1804 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1806 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1807 if (opendata == NULL)
1808 goto err_put_state_owner;
1810 if (dentry->d_inode != NULL)
1811 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1813 status = _nfs4_proc_open(opendata);
1815 goto err_opendata_put;
1817 state = nfs4_opendata_to_nfs4_state(opendata);
1818 status = PTR_ERR(state);
1820 goto err_opendata_put;
1821 if (server->caps & NFS_CAP_POSIX_LOCK)
1822 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1824 if (opendata->o_arg.open_flags & O_EXCL) {
1825 nfs4_exclusive_attrset(opendata, sattr);
1827 nfs_fattr_init(opendata->o_res.f_attr);
1828 status = nfs4_do_setattr(state->inode, cred,
1829 opendata->o_res.f_attr, sattr,
1832 nfs_setattr_update_inode(state->inode, sattr);
1833 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1835 nfs4_opendata_put(opendata);
1836 nfs4_put_state_owner(sp);
1840 nfs4_opendata_put(opendata);
1841 err_put_state_owner:
1842 nfs4_put_state_owner(sp);
1849 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)
1851 struct nfs4_exception exception = { };
1852 struct nfs4_state *res;
1856 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1859 /* NOTE: BAD_SEQID means the server and client disagree about the
1860 * book-keeping w.r.t. state-changing operations
1861 * (OPEN/CLOSE/LOCK/LOCKU...)
1862 * It is actually a sign of a bug on the client or on the server.
1864 * If we receive a BAD_SEQID error in the particular case of
1865 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1866 * have unhashed the old state_owner for us, and that we can
1867 * therefore safely retry using a new one. We should still warn
1868 * the user though...
1870 if (status == -NFS4ERR_BAD_SEQID) {
1871 pr_warn_ratelimited("NFS: v4 server %s "
1872 " returned a bad sequence-id error!\n",
1873 NFS_SERVER(dir)->nfs_client->cl_hostname);
1874 exception.retry = 1;
1878 * BAD_STATEID on OPEN means that the server cancelled our
1879 * state before it received the OPEN_CONFIRM.
1880 * Recover by retrying the request as per the discussion
1881 * on Page 181 of RFC3530.
1883 if (status == -NFS4ERR_BAD_STATEID) {
1884 exception.retry = 1;
1887 if (status == -EAGAIN) {
1888 /* We must have found a delegation */
1889 exception.retry = 1;
1892 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1893 status, &exception));
1894 } while (exception.retry);
1898 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1899 struct nfs_fattr *fattr, struct iattr *sattr,
1900 struct nfs4_state *state)
1902 struct nfs_server *server = NFS_SERVER(inode);
1903 struct nfs_setattrargs arg = {
1904 .fh = NFS_FH(inode),
1907 .bitmask = server->attr_bitmask,
1909 struct nfs_setattrres res = {
1913 struct rpc_message msg = {
1914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1919 unsigned long timestamp = jiffies;
1922 nfs_fattr_init(fattr);
1924 if (state != NULL) {
1925 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1926 current->files, current->tgid);
1927 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1929 /* Use that stateid */
1931 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1933 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1934 if (status == 0 && state != NULL)
1935 renew_lease(server, timestamp);
1939 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1940 struct nfs_fattr *fattr, struct iattr *sattr,
1941 struct nfs4_state *state)
1943 struct nfs_server *server = NFS_SERVER(inode);
1944 struct nfs4_exception exception = {
1950 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
1952 case -NFS4ERR_OPENMODE:
1953 if (state && !(state->state & FMODE_WRITE)) {
1955 if (sattr->ia_valid & ATTR_OPEN)
1960 err = nfs4_handle_exception(server, err, &exception);
1961 } while (exception.retry);
1966 struct nfs4_closedata {
1967 struct inode *inode;
1968 struct nfs4_state *state;
1969 struct nfs_closeargs arg;
1970 struct nfs_closeres res;
1971 struct nfs_fattr fattr;
1972 unsigned long timestamp;
1977 static void nfs4_free_closedata(void *data)
1979 struct nfs4_closedata *calldata = data;
1980 struct nfs4_state_owner *sp = calldata->state->owner;
1981 struct super_block *sb = calldata->state->inode->i_sb;
1984 pnfs_roc_release(calldata->state->inode);
1985 nfs4_put_open_state(calldata->state);
1986 nfs_free_seqid(calldata->arg.seqid);
1987 nfs4_put_state_owner(sp);
1988 nfs_sb_deactive(sb);
1992 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1995 spin_lock(&state->owner->so_lock);
1996 if (!(fmode & FMODE_READ))
1997 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1998 if (!(fmode & FMODE_WRITE))
1999 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2000 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2001 spin_unlock(&state->owner->so_lock);
2004 static void nfs4_close_done(struct rpc_task *task, void *data)
2006 struct nfs4_closedata *calldata = data;
2007 struct nfs4_state *state = calldata->state;
2008 struct nfs_server *server = NFS_SERVER(calldata->inode);
2010 dprintk("%s: begin!\n", __func__);
2011 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2013 /* hmm. we are done with the inode, and in the process of freeing
2014 * the state_owner. we keep this around to process errors
2016 switch (task->tk_status) {
2019 pnfs_roc_set_barrier(state->inode,
2020 calldata->roc_barrier);
2021 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2022 renew_lease(server, calldata->timestamp);
2023 nfs4_close_clear_stateid_flags(state,
2024 calldata->arg.fmode);
2026 case -NFS4ERR_STALE_STATEID:
2027 case -NFS4ERR_OLD_STATEID:
2028 case -NFS4ERR_BAD_STATEID:
2029 case -NFS4ERR_EXPIRED:
2030 if (calldata->arg.fmode == 0)
2033 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2034 rpc_restart_call_prepare(task);
2036 nfs_release_seqid(calldata->arg.seqid);
2037 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2038 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2041 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2043 struct nfs4_closedata *calldata = data;
2044 struct nfs4_state *state = calldata->state;
2047 dprintk("%s: begin!\n", __func__);
2048 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2051 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2052 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2053 spin_lock(&state->owner->so_lock);
2054 /* Calculate the change in open mode */
2055 if (state->n_rdwr == 0) {
2056 if (state->n_rdonly == 0) {
2057 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2058 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2059 calldata->arg.fmode &= ~FMODE_READ;
2061 if (state->n_wronly == 0) {
2062 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2063 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2064 calldata->arg.fmode &= ~FMODE_WRITE;
2067 spin_unlock(&state->owner->so_lock);
2070 /* Note: exit _without_ calling nfs4_close_done */
2071 task->tk_action = NULL;
2075 if (calldata->arg.fmode == 0) {
2076 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2077 if (calldata->roc &&
2078 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2079 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2085 nfs_fattr_init(calldata->res.fattr);
2086 calldata->timestamp = jiffies;
2087 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2088 &calldata->arg.seq_args,
2089 &calldata->res.seq_res,
2092 rpc_call_start(task);
2094 dprintk("%s: done!\n", __func__);
2097 static const struct rpc_call_ops nfs4_close_ops = {
2098 .rpc_call_prepare = nfs4_close_prepare,
2099 .rpc_call_done = nfs4_close_done,
2100 .rpc_release = nfs4_free_closedata,
2104 * It is possible for data to be read/written from a mem-mapped file
2105 * after the sys_close call (which hits the vfs layer as a flush).
2106 * This means that we can't safely call nfsv4 close on a file until
2107 * the inode is cleared. This in turn means that we are not good
2108 * NFSv4 citizens - we do not indicate to the server to update the file's
2109 * share state even when we are done with one of the three share
2110 * stateid's in the inode.
2112 * NOTE: Caller must be holding the sp->so_owner semaphore!
2114 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2116 struct nfs_server *server = NFS_SERVER(state->inode);
2117 struct nfs4_closedata *calldata;
2118 struct nfs4_state_owner *sp = state->owner;
2119 struct rpc_task *task;
2120 struct rpc_message msg = {
2121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2122 .rpc_cred = state->owner->so_cred,
2124 struct rpc_task_setup task_setup_data = {
2125 .rpc_client = server->client,
2126 .rpc_message = &msg,
2127 .callback_ops = &nfs4_close_ops,
2128 .workqueue = nfsiod_workqueue,
2129 .flags = RPC_TASK_ASYNC,
2131 int status = -ENOMEM;
2133 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2134 if (calldata == NULL)
2136 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2137 calldata->inode = state->inode;
2138 calldata->state = state;
2139 calldata->arg.fh = NFS_FH(state->inode);
2140 calldata->arg.stateid = &state->open_stateid;
2141 /* Serialization for the sequence id */
2142 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2143 if (calldata->arg.seqid == NULL)
2144 goto out_free_calldata;
2145 calldata->arg.fmode = 0;
2146 calldata->arg.bitmask = server->cache_consistency_bitmask;
2147 calldata->res.fattr = &calldata->fattr;
2148 calldata->res.seqid = calldata->arg.seqid;
2149 calldata->res.server = server;
2150 calldata->roc = roc;
2151 nfs_sb_active(calldata->inode->i_sb);
2153 msg.rpc_argp = &calldata->arg;
2154 msg.rpc_resp = &calldata->res;
2155 task_setup_data.callback_data = calldata;
2156 task = rpc_run_task(&task_setup_data);
2158 return PTR_ERR(task);
2161 status = rpc_wait_for_completion_task(task);
2168 pnfs_roc_release(state->inode);
2169 nfs4_put_open_state(state);
2170 nfs4_put_state_owner(sp);
2174 static struct inode *
2175 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2177 struct nfs4_state *state;
2179 /* Protect against concurrent sillydeletes */
2180 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2182 return ERR_CAST(state);
2184 return igrab(state->inode);
2187 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2189 if (ctx->state == NULL)
2192 nfs4_close_sync(ctx->state, ctx->mode);
2194 nfs4_close_state(ctx->state, ctx->mode);
2197 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2199 struct nfs4_server_caps_arg args = {
2202 struct nfs4_server_caps_res res = {};
2203 struct rpc_message msg = {
2204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2210 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2212 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2213 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2214 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2215 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2216 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2217 NFS_CAP_CTIME|NFS_CAP_MTIME);
2218 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2219 server->caps |= NFS_CAP_ACLS;
2220 if (res.has_links != 0)
2221 server->caps |= NFS_CAP_HARDLINKS;
2222 if (res.has_symlinks != 0)
2223 server->caps |= NFS_CAP_SYMLINKS;
2224 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2225 server->caps |= NFS_CAP_FILEID;
2226 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2227 server->caps |= NFS_CAP_MODE;
2228 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2229 server->caps |= NFS_CAP_NLINK;
2230 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2231 server->caps |= NFS_CAP_OWNER;
2232 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2233 server->caps |= NFS_CAP_OWNER_GROUP;
2234 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2235 server->caps |= NFS_CAP_ATIME;
2236 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2237 server->caps |= NFS_CAP_CTIME;
2238 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2239 server->caps |= NFS_CAP_MTIME;
2241 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2242 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2243 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2244 server->acl_bitmask = res.acl_bitmask;
2245 server->fh_expire_type = res.fh_expire_type;
2251 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2253 struct nfs4_exception exception = { };
2256 err = nfs4_handle_exception(server,
2257 _nfs4_server_capabilities(server, fhandle),
2259 } while (exception.retry);
2263 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2264 struct nfs_fsinfo *info)
2266 struct nfs4_lookup_root_arg args = {
2267 .bitmask = nfs4_fattr_bitmap,
2269 struct nfs4_lookup_res res = {
2271 .fattr = info->fattr,
2274 struct rpc_message msg = {
2275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2280 nfs_fattr_init(info->fattr);
2281 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2284 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2285 struct nfs_fsinfo *info)
2287 struct nfs4_exception exception = { };
2290 err = _nfs4_lookup_root(server, fhandle, info);
2293 case -NFS4ERR_WRONGSEC:
2296 err = nfs4_handle_exception(server, err, &exception);
2298 } while (exception.retry);
2303 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2304 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2306 struct rpc_auth *auth;
2309 auth = rpcauth_create(flavor, server->client);
2314 ret = nfs4_lookup_root(server, fhandle, info);
2319 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2320 struct nfs_fsinfo *info)
2322 int i, len, status = 0;
2323 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2325 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2326 flav_array[len] = RPC_AUTH_NULL;
2329 for (i = 0; i < len; i++) {
2330 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2331 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2336 * -EACCESS could mean that the user doesn't have correct permissions
2337 * to access the mount. It could also mean that we tried to mount
2338 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2339 * existing mount programs don't handle -EACCES very well so it should
2340 * be mapped to -EPERM instead.
2342 if (status == -EACCES)
2348 * get the file handle for the "/" directory on the server
2350 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2351 struct nfs_fsinfo *info)
2353 int minor_version = server->nfs_client->cl_minorversion;
2354 int status = nfs4_lookup_root(server, fhandle, info);
2355 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2357 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2358 * by nfs4_map_errors() as this function exits.
2360 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2362 status = nfs4_server_capabilities(server, fhandle);
2364 status = nfs4_do_fsinfo(server, fhandle, info);
2365 return nfs4_map_errors(status);
2368 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2369 struct nfs_fsinfo *info)
2372 struct nfs_fattr *fattr = info->fattr;
2374 error = nfs4_server_capabilities(server, mntfh);
2376 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2380 error = nfs4_proc_getattr(server, mntfh, fattr);
2382 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2386 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2387 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2388 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2394 * Get locations and (maybe) other attributes of a referral.
2395 * Note that we'll actually follow the referral later when
2396 * we detect fsid mismatch in inode revalidation
2398 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2399 const struct qstr *name, struct nfs_fattr *fattr,
2400 struct nfs_fh *fhandle)
2402 int status = -ENOMEM;
2403 struct page *page = NULL;
2404 struct nfs4_fs_locations *locations = NULL;
2406 page = alloc_page(GFP_KERNEL);
2409 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2410 if (locations == NULL)
2413 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2416 /* Make sure server returned a different fsid for the referral */
2417 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2418 dprintk("%s: server did not return a different fsid for"
2419 " a referral at %s\n", __func__, name->name);
2423 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2424 nfs_fixup_referral_attributes(&locations->fattr);
2426 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2427 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2428 memset(fhandle, 0, sizeof(struct nfs_fh));
2436 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2438 struct nfs4_getattr_arg args = {
2440 .bitmask = server->attr_bitmask,
2442 struct nfs4_getattr_res res = {
2446 struct rpc_message msg = {
2447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2452 nfs_fattr_init(fattr);
2453 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2456 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2458 struct nfs4_exception exception = { };
2461 err = nfs4_handle_exception(server,
2462 _nfs4_proc_getattr(server, fhandle, fattr),
2464 } while (exception.retry);
2469 * The file is not closed if it is opened due to the a request to change
2470 * the size of the file. The open call will not be needed once the
2471 * VFS layer lookup-intents are implemented.
2473 * Close is called when the inode is destroyed.
2474 * If we haven't opened the file for O_WRONLY, we
2475 * need to in the size_change case to obtain a stateid.
2478 * Because OPEN is always done by name in nfsv4, it is
2479 * possible that we opened a different file by the same
2480 * name. We can recognize this race condition, but we
2481 * can't do anything about it besides returning an error.
2483 * This will be fixed with VFS changes (lookup-intent).
2486 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2487 struct iattr *sattr)
2489 struct inode *inode = dentry->d_inode;
2490 struct rpc_cred *cred = NULL;
2491 struct nfs4_state *state = NULL;
2494 if (pnfs_ld_layoutret_on_setattr(inode))
2495 pnfs_return_layout(inode);
2497 nfs_fattr_init(fattr);
2499 /* Search for an existing open(O_WRITE) file */
2500 if (sattr->ia_valid & ATTR_FILE) {
2501 struct nfs_open_context *ctx;
2503 ctx = nfs_file_open_context(sattr->ia_file);
2510 /* Deal with open(O_TRUNC) */
2511 if (sattr->ia_valid & ATTR_OPEN)
2512 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2514 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2516 nfs_setattr_update_inode(inode, sattr);
2520 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2521 const struct qstr *name, struct nfs_fh *fhandle,
2522 struct nfs_fattr *fattr)
2524 struct nfs_server *server = NFS_SERVER(dir);
2526 struct nfs4_lookup_arg args = {
2527 .bitmask = server->attr_bitmask,
2528 .dir_fh = NFS_FH(dir),
2531 struct nfs4_lookup_res res = {
2536 struct rpc_message msg = {
2537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2542 nfs_fattr_init(fattr);
2544 dprintk("NFS call lookup %s\n", name->name);
2545 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2546 dprintk("NFS reply lookup: %d\n", status);
2550 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2552 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2553 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2554 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2558 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2559 struct qstr *name, struct nfs_fh *fhandle,
2560 struct nfs_fattr *fattr)
2562 struct nfs4_exception exception = { };
2563 struct rpc_clnt *client = *clnt;
2566 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2568 case -NFS4ERR_BADNAME:
2571 case -NFS4ERR_MOVED:
2572 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2574 case -NFS4ERR_WRONGSEC:
2576 if (client != *clnt)
2579 client = nfs4_create_sec_client(client, dir, name);
2581 return PTR_ERR(client);
2583 exception.retry = 1;
2586 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2588 } while (exception.retry);
2593 else if (client != *clnt)
2594 rpc_shutdown_client(client);
2599 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2600 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2603 struct rpc_clnt *client = NFS_CLIENT(dir);
2605 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2606 if (client != NFS_CLIENT(dir)) {
2607 rpc_shutdown_client(client);
2608 nfs_fixup_secinfo_attributes(fattr);
2614 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2615 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2618 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2620 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2622 rpc_shutdown_client(client);
2623 return ERR_PTR(status);
2628 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2630 struct nfs_server *server = NFS_SERVER(inode);
2631 struct nfs4_accessargs args = {
2632 .fh = NFS_FH(inode),
2633 .bitmask = server->cache_consistency_bitmask,
2635 struct nfs4_accessres res = {
2638 struct rpc_message msg = {
2639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2642 .rpc_cred = entry->cred,
2644 int mode = entry->mask;
2648 * Determine which access bits we want to ask for...
2650 if (mode & MAY_READ)
2651 args.access |= NFS4_ACCESS_READ;
2652 if (S_ISDIR(inode->i_mode)) {
2653 if (mode & MAY_WRITE)
2654 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2655 if (mode & MAY_EXEC)
2656 args.access |= NFS4_ACCESS_LOOKUP;
2658 if (mode & MAY_WRITE)
2659 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2660 if (mode & MAY_EXEC)
2661 args.access |= NFS4_ACCESS_EXECUTE;
2664 res.fattr = nfs_alloc_fattr();
2665 if (res.fattr == NULL)
2668 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2671 if (res.access & NFS4_ACCESS_READ)
2672 entry->mask |= MAY_READ;
2673 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2674 entry->mask |= MAY_WRITE;
2675 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2676 entry->mask |= MAY_EXEC;
2677 nfs_refresh_inode(inode, res.fattr);
2679 nfs_free_fattr(res.fattr);
2683 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2685 struct nfs4_exception exception = { };
2688 err = nfs4_handle_exception(NFS_SERVER(inode),
2689 _nfs4_proc_access(inode, entry),
2691 } while (exception.retry);
2696 * TODO: For the time being, we don't try to get any attributes
2697 * along with any of the zero-copy operations READ, READDIR,
2700 * In the case of the first three, we want to put the GETATTR
2701 * after the read-type operation -- this is because it is hard
2702 * to predict the length of a GETATTR response in v4, and thus
2703 * align the READ data correctly. This means that the GETATTR
2704 * may end up partially falling into the page cache, and we should
2705 * shift it into the 'tail' of the xdr_buf before processing.
2706 * To do this efficiently, we need to know the total length
2707 * of data received, which doesn't seem to be available outside
2710 * In the case of WRITE, we also want to put the GETATTR after
2711 * the operation -- in this case because we want to make sure
2712 * we get the post-operation mtime and size. This means that
2713 * we can't use xdr_encode_pages() as written: we need a variant
2714 * of it which would leave room in the 'tail' iovec.
2716 * Both of these changes to the XDR layer would in fact be quite
2717 * minor, but I decided to leave them for a subsequent patch.
2719 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2720 unsigned int pgbase, unsigned int pglen)
2722 struct nfs4_readlink args = {
2723 .fh = NFS_FH(inode),
2728 struct nfs4_readlink_res res;
2729 struct rpc_message msg = {
2730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2735 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2738 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2739 unsigned int pgbase, unsigned int pglen)
2741 struct nfs4_exception exception = { };
2744 err = nfs4_handle_exception(NFS_SERVER(inode),
2745 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2747 } while (exception.retry);
2753 * We will need to arrange for the VFS layer to provide an atomic open.
2754 * Until then, this create/open method is prone to inefficiency and race
2755 * conditions due to the lookup, create, and open VFS calls from sys_open()
2756 * placed on the wire.
2758 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2759 * The file will be opened again in the subsequent VFS open call
2760 * (nfs4_proc_file_open).
2762 * The open for read will just hang around to be used by any process that
2763 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2767 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2768 int flags, struct nfs_open_context *ctx)
2770 struct dentry *de = dentry;
2771 struct nfs4_state *state;
2772 struct rpc_cred *cred = NULL;
2781 sattr->ia_mode &= ~current_umask();
2782 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2784 if (IS_ERR(state)) {
2785 status = PTR_ERR(state);
2788 d_add(dentry, igrab(state->inode));
2789 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2793 nfs4_close_sync(state, fmode);
2798 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2800 struct nfs_server *server = NFS_SERVER(dir);
2801 struct nfs_removeargs args = {
2803 .name.len = name->len,
2804 .name.name = name->name,
2806 struct nfs_removeres res = {
2809 struct rpc_message msg = {
2810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2816 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2818 update_changeattr(dir, &res.cinfo);
2822 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2824 struct nfs4_exception exception = { };
2827 err = nfs4_handle_exception(NFS_SERVER(dir),
2828 _nfs4_proc_remove(dir, name),
2830 } while (exception.retry);
2834 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2836 struct nfs_server *server = NFS_SERVER(dir);
2837 struct nfs_removeargs *args = msg->rpc_argp;
2838 struct nfs_removeres *res = msg->rpc_resp;
2840 res->server = server;
2841 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2842 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2845 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2847 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2848 &data->args.seq_args,
2852 rpc_call_start(task);
2855 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2857 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2859 if (!nfs4_sequence_done(task, &res->seq_res))
2861 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2863 update_changeattr(dir, &res->cinfo);
2867 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2869 struct nfs_server *server = NFS_SERVER(dir);
2870 struct nfs_renameargs *arg = msg->rpc_argp;
2871 struct nfs_renameres *res = msg->rpc_resp;
2873 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2874 res->server = server;
2875 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2878 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2880 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2881 &data->args.seq_args,
2885 rpc_call_start(task);
2888 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2889 struct inode *new_dir)
2891 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2893 if (!nfs4_sequence_done(task, &res->seq_res))
2895 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2898 update_changeattr(old_dir, &res->old_cinfo);
2899 update_changeattr(new_dir, &res->new_cinfo);
2903 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2904 struct inode *new_dir, struct qstr *new_name)
2906 struct nfs_server *server = NFS_SERVER(old_dir);
2907 struct nfs_renameargs arg = {
2908 .old_dir = NFS_FH(old_dir),
2909 .new_dir = NFS_FH(new_dir),
2910 .old_name = old_name,
2911 .new_name = new_name,
2913 struct nfs_renameres res = {
2916 struct rpc_message msg = {
2917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2921 int status = -ENOMEM;
2923 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2925 update_changeattr(old_dir, &res.old_cinfo);
2926 update_changeattr(new_dir, &res.new_cinfo);
2931 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2932 struct inode *new_dir, struct qstr *new_name)
2934 struct nfs4_exception exception = { };
2937 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2938 _nfs4_proc_rename(old_dir, old_name,
2941 } while (exception.retry);
2945 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2947 struct nfs_server *server = NFS_SERVER(inode);
2948 struct nfs4_link_arg arg = {
2949 .fh = NFS_FH(inode),
2950 .dir_fh = NFS_FH(dir),
2952 .bitmask = server->attr_bitmask,
2954 struct nfs4_link_res res = {
2957 struct rpc_message msg = {
2958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2962 int status = -ENOMEM;
2964 res.fattr = nfs_alloc_fattr();
2965 if (res.fattr == NULL)
2968 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2970 update_changeattr(dir, &res.cinfo);
2971 nfs_post_op_update_inode(inode, res.fattr);
2974 nfs_free_fattr(res.fattr);
2978 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2980 struct nfs4_exception exception = { };
2983 err = nfs4_handle_exception(NFS_SERVER(inode),
2984 _nfs4_proc_link(inode, dir, name),
2986 } while (exception.retry);
2990 struct nfs4_createdata {
2991 struct rpc_message msg;
2992 struct nfs4_create_arg arg;
2993 struct nfs4_create_res res;
2995 struct nfs_fattr fattr;
2998 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2999 struct qstr *name, struct iattr *sattr, u32 ftype)
3001 struct nfs4_createdata *data;
3003 data = kzalloc(sizeof(*data), GFP_KERNEL);
3005 struct nfs_server *server = NFS_SERVER(dir);
3007 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3008 data->msg.rpc_argp = &data->arg;
3009 data->msg.rpc_resp = &data->res;
3010 data->arg.dir_fh = NFS_FH(dir);
3011 data->arg.server = server;
3012 data->arg.name = name;
3013 data->arg.attrs = sattr;
3014 data->arg.ftype = ftype;
3015 data->arg.bitmask = server->attr_bitmask;
3016 data->res.server = server;
3017 data->res.fh = &data->fh;
3018 data->res.fattr = &data->fattr;
3019 nfs_fattr_init(data->res.fattr);
3024 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3026 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3027 &data->arg.seq_args, &data->res.seq_res, 1);
3029 update_changeattr(dir, &data->res.dir_cinfo);
3030 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3035 static void nfs4_free_createdata(struct nfs4_createdata *data)
3040 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3041 struct page *page, unsigned int len, struct iattr *sattr)
3043 struct nfs4_createdata *data;
3044 int status = -ENAMETOOLONG;
3046 if (len > NFS4_MAXPATHLEN)
3050 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3054 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3055 data->arg.u.symlink.pages = &page;
3056 data->arg.u.symlink.len = len;
3058 status = nfs4_do_create(dir, dentry, data);
3060 nfs4_free_createdata(data);
3065 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3066 struct page *page, unsigned int len, struct iattr *sattr)
3068 struct nfs4_exception exception = { };
3071 err = nfs4_handle_exception(NFS_SERVER(dir),
3072 _nfs4_proc_symlink(dir, dentry, page,
3075 } while (exception.retry);
3079 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3080 struct iattr *sattr)
3082 struct nfs4_createdata *data;
3083 int status = -ENOMEM;
3085 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3089 status = nfs4_do_create(dir, dentry, data);
3091 nfs4_free_createdata(data);
3096 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3097 struct iattr *sattr)
3099 struct nfs4_exception exception = { };
3102 sattr->ia_mode &= ~current_umask();
3104 err = nfs4_handle_exception(NFS_SERVER(dir),
3105 _nfs4_proc_mkdir(dir, dentry, sattr),
3107 } while (exception.retry);
3111 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3112 u64 cookie, struct page **pages, unsigned int count, int plus)
3114 struct inode *dir = dentry->d_inode;
3115 struct nfs4_readdir_arg args = {
3120 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3123 struct nfs4_readdir_res res;
3124 struct rpc_message msg = {
3125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3132 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3133 dentry->d_parent->d_name.name,
3134 dentry->d_name.name,
3135 (unsigned long long)cookie);
3136 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3137 res.pgbase = args.pgbase;
3138 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3140 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3141 status += args.pgbase;
3144 nfs_invalidate_atime(dir);
3146 dprintk("%s: returns %d\n", __func__, status);
3150 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3151 u64 cookie, struct page **pages, unsigned int count, int plus)
3153 struct nfs4_exception exception = { };
3156 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3157 _nfs4_proc_readdir(dentry, cred, cookie,
3158 pages, count, plus),
3160 } while (exception.retry);
3164 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3165 struct iattr *sattr, dev_t rdev)
3167 struct nfs4_createdata *data;
3168 int mode = sattr->ia_mode;
3169 int status = -ENOMEM;
3171 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3172 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3174 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3179 data->arg.ftype = NF4FIFO;
3180 else if (S_ISBLK(mode)) {
3181 data->arg.ftype = NF4BLK;
3182 data->arg.u.device.specdata1 = MAJOR(rdev);
3183 data->arg.u.device.specdata2 = MINOR(rdev);
3185 else if (S_ISCHR(mode)) {
3186 data->arg.ftype = NF4CHR;
3187 data->arg.u.device.specdata1 = MAJOR(rdev);
3188 data->arg.u.device.specdata2 = MINOR(rdev);
3191 status = nfs4_do_create(dir, dentry, data);
3193 nfs4_free_createdata(data);
3198 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3199 struct iattr *sattr, dev_t rdev)
3201 struct nfs4_exception exception = { };
3204 sattr->ia_mode &= ~current_umask();
3206 err = nfs4_handle_exception(NFS_SERVER(dir),
3207 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3209 } while (exception.retry);
3213 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3214 struct nfs_fsstat *fsstat)
3216 struct nfs4_statfs_arg args = {
3218 .bitmask = server->attr_bitmask,
3220 struct nfs4_statfs_res res = {
3223 struct rpc_message msg = {
3224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3229 nfs_fattr_init(fsstat->fattr);
3230 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3233 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3235 struct nfs4_exception exception = { };
3238 err = nfs4_handle_exception(server,
3239 _nfs4_proc_statfs(server, fhandle, fsstat),
3241 } while (exception.retry);
3245 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3246 struct nfs_fsinfo *fsinfo)
3248 struct nfs4_fsinfo_arg args = {
3250 .bitmask = server->attr_bitmask,
3252 struct nfs4_fsinfo_res res = {
3255 struct rpc_message msg = {
3256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3261 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3264 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3266 struct nfs4_exception exception = { };
3270 err = nfs4_handle_exception(server,
3271 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3273 } while (exception.retry);
3277 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3279 nfs_fattr_init(fsinfo->fattr);
3280 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3283 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3284 struct nfs_pathconf *pathconf)
3286 struct nfs4_pathconf_arg args = {
3288 .bitmask = server->attr_bitmask,
3290 struct nfs4_pathconf_res res = {
3291 .pathconf = pathconf,
3293 struct rpc_message msg = {
3294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3299 /* None of the pathconf attributes are mandatory to implement */
3300 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3301 memset(pathconf, 0, sizeof(*pathconf));
3305 nfs_fattr_init(pathconf->fattr);
3306 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3309 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3310 struct nfs_pathconf *pathconf)
3312 struct nfs4_exception exception = { };
3316 err = nfs4_handle_exception(server,
3317 _nfs4_proc_pathconf(server, fhandle, pathconf),
3319 } while (exception.retry);
3323 void __nfs4_read_done_cb(struct nfs_read_data *data)
3325 nfs_invalidate_atime(data->header->inode);
3328 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3330 struct nfs_server *server = NFS_SERVER(data->header->inode);
3332 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3333 rpc_restart_call_prepare(task);
3337 __nfs4_read_done_cb(data);
3338 if (task->tk_status > 0)
3339 renew_lease(server, data->timestamp);
3343 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3346 dprintk("--> %s\n", __func__);
3348 if (!nfs4_sequence_done(task, &data->res.seq_res))
3351 return data->read_done_cb ? data->read_done_cb(task, data) :
3352 nfs4_read_done_cb(task, data);
3355 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3357 data->timestamp = jiffies;
3358 data->read_done_cb = nfs4_read_done_cb;
3359 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3360 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3363 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3365 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3366 &data->args.seq_args,
3370 rpc_call_start(task);
3373 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3375 struct inode *inode = data->header->inode;
3377 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3378 rpc_restart_call_prepare(task);
3381 if (task->tk_status >= 0) {
3382 renew_lease(NFS_SERVER(inode), data->timestamp);
3383 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3388 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3390 if (!nfs4_sequence_done(task, &data->res.seq_res))
3392 return data->write_done_cb ? data->write_done_cb(task, data) :
3393 nfs4_write_done_cb(task, data);
3397 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3399 const struct nfs_pgio_header *hdr = data->header;
3401 /* Don't request attributes for pNFS or O_DIRECT writes */
3402 if (data->ds_clp != NULL || hdr->dreq != NULL)
3404 /* Otherwise, request attributes if and only if we don't hold
3407 return nfs_have_delegation(hdr->inode, FMODE_READ) == 0;
3410 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3412 struct nfs_server *server = NFS_SERVER(data->header->inode);
3414 if (!nfs4_write_need_cache_consistency_data(data)) {
3415 data->args.bitmask = NULL;
3416 data->res.fattr = NULL;
3418 data->args.bitmask = server->cache_consistency_bitmask;
3420 if (!data->write_done_cb)
3421 data->write_done_cb = nfs4_write_done_cb;
3422 data->res.server = server;
3423 data->timestamp = jiffies;
3425 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3426 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3429 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3431 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3432 &data->args.seq_args,
3436 rpc_call_start(task);
3439 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3441 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3442 &data->args.seq_args,
3446 rpc_call_start(task);
3449 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3451 struct inode *inode = data->inode;
3453 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3454 rpc_restart_call_prepare(task);
3460 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3462 if (!nfs4_sequence_done(task, &data->res.seq_res))
3464 return data->commit_done_cb(task, data);
3467 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3469 struct nfs_server *server = NFS_SERVER(data->inode);
3471 if (data->commit_done_cb == NULL)
3472 data->commit_done_cb = nfs4_commit_done_cb;
3473 data->res.server = server;
3474 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3475 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3478 struct nfs4_renewdata {
3479 struct nfs_client *client;
3480 unsigned long timestamp;
3484 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3485 * standalone procedure for queueing an asynchronous RENEW.
3487 static void nfs4_renew_release(void *calldata)
3489 struct nfs4_renewdata *data = calldata;
3490 struct nfs_client *clp = data->client;
3492 if (atomic_read(&clp->cl_count) > 1)
3493 nfs4_schedule_state_renewal(clp);
3494 nfs_put_client(clp);
3498 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3500 struct nfs4_renewdata *data = calldata;
3501 struct nfs_client *clp = data->client;
3502 unsigned long timestamp = data->timestamp;
3504 if (task->tk_status < 0) {
3505 /* Unless we're shutting down, schedule state recovery! */
3506 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3508 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3509 nfs4_schedule_lease_recovery(clp);
3512 nfs4_schedule_path_down_recovery(clp);
3514 do_renew_lease(clp, timestamp);
3517 static const struct rpc_call_ops nfs4_renew_ops = {
3518 .rpc_call_done = nfs4_renew_done,
3519 .rpc_release = nfs4_renew_release,
3522 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3524 struct rpc_message msg = {
3525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3529 struct nfs4_renewdata *data;
3531 if (renew_flags == 0)
3533 if (!atomic_inc_not_zero(&clp->cl_count))
3535 data = kmalloc(sizeof(*data), GFP_NOFS);
3539 data->timestamp = jiffies;
3540 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3541 &nfs4_renew_ops, data);
3544 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3546 struct rpc_message msg = {
3547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3551 unsigned long now = jiffies;
3554 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3557 do_renew_lease(clp, now);
3561 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3563 return (server->caps & NFS_CAP_ACLS)
3564 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3565 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3568 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3569 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3572 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3574 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3575 struct page **pages, unsigned int *pgbase)
3577 struct page *newpage, **spages;
3583 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3584 newpage = alloc_page(GFP_KERNEL);
3586 if (newpage == NULL)
3588 memcpy(page_address(newpage), buf, len);
3593 } while (buflen != 0);
3599 __free_page(spages[rc-1]);
3603 struct nfs4_cached_acl {
3609 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3611 struct nfs_inode *nfsi = NFS_I(inode);
3613 spin_lock(&inode->i_lock);
3614 kfree(nfsi->nfs4_acl);
3615 nfsi->nfs4_acl = acl;
3616 spin_unlock(&inode->i_lock);
3619 static void nfs4_zap_acl_attr(struct inode *inode)
3621 nfs4_set_cached_acl(inode, NULL);
3624 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3626 struct nfs_inode *nfsi = NFS_I(inode);
3627 struct nfs4_cached_acl *acl;
3630 spin_lock(&inode->i_lock);
3631 acl = nfsi->nfs4_acl;
3634 if (buf == NULL) /* user is just asking for length */
3636 if (acl->cached == 0)
3638 ret = -ERANGE; /* see getxattr(2) man page */
3639 if (acl->len > buflen)
3641 memcpy(buf, acl->data, acl->len);
3645 spin_unlock(&inode->i_lock);
3649 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3651 struct nfs4_cached_acl *acl;
3653 if (pages && acl_len <= PAGE_SIZE) {
3654 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3658 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3660 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3667 nfs4_set_cached_acl(inode, acl);
3671 * The getxattr API returns the required buffer length when called with a
3672 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3673 * the required buf. On a NULL buf, we send a page of data to the server
3674 * guessing that the ACL request can be serviced by a page. If so, we cache
3675 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3676 * the cache. If not so, we throw away the page, and cache the required
3677 * length. The next getxattr call will then produce another round trip to
3678 * the server, this time with the input buf of the required size.
3680 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3682 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3683 struct nfs_getaclargs args = {
3684 .fh = NFS_FH(inode),
3688 struct nfs_getaclres res = {
3691 struct rpc_message msg = {
3692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3696 int ret = -ENOMEM, npages, i, acl_len = 0;
3698 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3699 /* As long as we're doing a round trip to the server anyway,
3700 * let's be prepared for a page of acl data. */
3704 /* Add an extra page to handle the bitmap returned */
3707 for (i = 0; i < npages; i++) {
3708 pages[i] = alloc_page(GFP_KERNEL);
3713 /* for decoding across pages */
3714 res.acl_scratch = alloc_page(GFP_KERNEL);
3715 if (!res.acl_scratch)
3718 args.acl_len = npages * PAGE_SIZE;
3719 args.acl_pgbase = 0;
3721 /* Let decode_getfacl know not to fail if the ACL data is larger than
3722 * the page we send as a guess */
3724 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3726 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3727 __func__, buf, buflen, npages, args.acl_len);
3728 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3729 &msg, &args.seq_args, &res.seq_res, 0);
3733 acl_len = res.acl_len - res.acl_data_offset;
3734 if (acl_len > args.acl_len)
3735 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3737 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3741 if (acl_len > buflen)
3743 _copy_from_pages(buf, pages, res.acl_data_offset,
3748 for (i = 0; i < npages; i++)
3750 __free_page(pages[i]);
3751 if (res.acl_scratch)
3752 __free_page(res.acl_scratch);
3756 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3758 struct nfs4_exception exception = { };
3761 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3764 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3765 } while (exception.retry);
3769 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3771 struct nfs_server *server = NFS_SERVER(inode);
3774 if (!nfs4_server_supports_acls(server))
3776 ret = nfs_revalidate_inode(server, inode);
3779 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3780 nfs_zap_acl_cache(inode);
3781 ret = nfs4_read_cached_acl(inode, buf, buflen);
3783 /* -ENOENT is returned if there is no ACL or if there is an ACL
3784 * but no cached acl data, just the acl length */
3786 return nfs4_get_acl_uncached(inode, buf, buflen);
3789 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3791 struct nfs_server *server = NFS_SERVER(inode);
3792 struct page *pages[NFS4ACL_MAXPAGES];
3793 struct nfs_setaclargs arg = {
3794 .fh = NFS_FH(inode),
3798 struct nfs_setaclres res;
3799 struct rpc_message msg = {
3800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3806 if (!nfs4_server_supports_acls(server))
3808 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3811 nfs_inode_return_delegation(inode);
3812 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3815 * Free each page after tx, so the only ref left is
3816 * held by the network stack
3819 put_page(pages[i-1]);
3822 * Acl update can result in inode attribute update.
3823 * so mark the attribute cache invalid.
3825 spin_lock(&inode->i_lock);
3826 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3827 spin_unlock(&inode->i_lock);
3828 nfs_access_zap_cache(inode);
3829 nfs_zap_acl_cache(inode);
3833 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3835 struct nfs4_exception exception = { };
3838 err = nfs4_handle_exception(NFS_SERVER(inode),
3839 __nfs4_proc_set_acl(inode, buf, buflen),
3841 } while (exception.retry);
3846 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3848 struct nfs_client *clp = server->nfs_client;
3850 if (task->tk_status >= 0)
3852 switch(task->tk_status) {
3853 case -NFS4ERR_DELEG_REVOKED:
3854 case -NFS4ERR_ADMIN_REVOKED:
3855 case -NFS4ERR_BAD_STATEID:
3858 nfs_remove_bad_delegation(state->inode);
3859 case -NFS4ERR_OPENMODE:
3862 nfs4_schedule_stateid_recovery(server, state);
3863 goto wait_on_recovery;
3864 case -NFS4ERR_EXPIRED:
3866 nfs4_schedule_stateid_recovery(server, state);
3867 case -NFS4ERR_STALE_STATEID:
3868 case -NFS4ERR_STALE_CLIENTID:
3869 nfs4_schedule_lease_recovery(clp);
3870 goto wait_on_recovery;
3871 #if defined(CONFIG_NFS_V4_1)
3872 case -NFS4ERR_BADSESSION:
3873 case -NFS4ERR_BADSLOT:
3874 case -NFS4ERR_BAD_HIGH_SLOT:
3875 case -NFS4ERR_DEADSESSION:
3876 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3877 case -NFS4ERR_SEQ_FALSE_RETRY:
3878 case -NFS4ERR_SEQ_MISORDERED:
3879 dprintk("%s ERROR %d, Reset session\n", __func__,
3881 nfs4_schedule_session_recovery(clp->cl_session);
3882 task->tk_status = 0;
3884 #endif /* CONFIG_NFS_V4_1 */
3885 case -NFS4ERR_DELAY:
3886 nfs_inc_server_stats(server, NFSIOS_DELAY);
3887 case -NFS4ERR_GRACE:
3889 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3890 task->tk_status = 0;
3892 case -NFS4ERR_RETRY_UNCACHED_REP:
3893 case -NFS4ERR_OLD_STATEID:
3894 task->tk_status = 0;
3897 task->tk_status = nfs4_map_errors(task->tk_status);
3900 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3901 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3902 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3903 task->tk_status = 0;
3907 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3908 nfs4_verifier *bootverf)
3912 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3913 /* An impossible timestamp guarantees this value
3914 * will never match a generated boot time. */
3916 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3918 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3919 verf[0] = (__be32)nn->boot_time.tv_sec;
3920 verf[1] = (__be32)nn->boot_time.tv_nsec;
3922 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3925 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3926 unsigned short port, struct rpc_cred *cred,
3927 struct nfs4_setclientid_res *res)
3929 nfs4_verifier sc_verifier;
3930 struct nfs4_setclientid setclientid = {
3931 .sc_verifier = &sc_verifier,
3933 .sc_cb_ident = clp->cl_cb_ident,
3935 struct rpc_message msg = {
3936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3937 .rpc_argp = &setclientid,
3944 nfs4_init_boot_verifier(clp, &sc_verifier);
3948 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3949 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3951 rpc_peeraddr2str(clp->cl_rpcclient,
3953 rpc_peeraddr2str(clp->cl_rpcclient,
3955 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3956 clp->cl_id_uniquifier);
3957 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3958 sizeof(setclientid.sc_netid),
3959 rpc_peeraddr2str(clp->cl_rpcclient,
3960 RPC_DISPLAY_NETID));
3961 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3962 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3963 clp->cl_ipaddr, port >> 8, port & 255);
3966 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3967 if (status != -NFS4ERR_CLID_INUSE)
3970 ++clp->cl_id_uniquifier;
3974 ssleep(clp->cl_lease_time / HZ + 1);
3979 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3980 struct nfs4_setclientid_res *arg,
3981 struct rpc_cred *cred)
3983 struct nfs_fsinfo fsinfo;
3984 struct rpc_message msg = {
3985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3987 .rpc_resp = &fsinfo,
3994 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3996 spin_lock(&clp->cl_lock);
3997 clp->cl_lease_time = fsinfo.lease_time * HZ;
3998 clp->cl_last_renewal = now;
3999 spin_unlock(&clp->cl_lock);
4004 struct nfs4_delegreturndata {
4005 struct nfs4_delegreturnargs args;
4006 struct nfs4_delegreturnres res;
4008 nfs4_stateid stateid;
4009 unsigned long timestamp;
4010 struct nfs_fattr fattr;
4014 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4016 struct nfs4_delegreturndata *data = calldata;
4018 if (!nfs4_sequence_done(task, &data->res.seq_res))
4021 switch (task->tk_status) {
4022 case -NFS4ERR_STALE_STATEID:
4023 case -NFS4ERR_EXPIRED:
4025 renew_lease(data->res.server, data->timestamp);
4028 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4030 rpc_restart_call_prepare(task);
4034 data->rpc_status = task->tk_status;
4037 static void nfs4_delegreturn_release(void *calldata)
4042 #if defined(CONFIG_NFS_V4_1)
4043 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4045 struct nfs4_delegreturndata *d_data;
4047 d_data = (struct nfs4_delegreturndata *)data;
4049 if (nfs4_setup_sequence(d_data->res.server,
4050 &d_data->args.seq_args,
4051 &d_data->res.seq_res, task))
4053 rpc_call_start(task);
4055 #endif /* CONFIG_NFS_V4_1 */
4057 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4058 #if defined(CONFIG_NFS_V4_1)
4059 .rpc_call_prepare = nfs4_delegreturn_prepare,
4060 #endif /* CONFIG_NFS_V4_1 */
4061 .rpc_call_done = nfs4_delegreturn_done,
4062 .rpc_release = nfs4_delegreturn_release,
4065 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4067 struct nfs4_delegreturndata *data;
4068 struct nfs_server *server = NFS_SERVER(inode);
4069 struct rpc_task *task;
4070 struct rpc_message msg = {
4071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4074 struct rpc_task_setup task_setup_data = {
4075 .rpc_client = server->client,
4076 .rpc_message = &msg,
4077 .callback_ops = &nfs4_delegreturn_ops,
4078 .flags = RPC_TASK_ASYNC,
4082 data = kzalloc(sizeof(*data), GFP_NOFS);
4085 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4086 data->args.fhandle = &data->fh;
4087 data->args.stateid = &data->stateid;
4088 data->args.bitmask = server->cache_consistency_bitmask;
4089 nfs_copy_fh(&data->fh, NFS_FH(inode));
4090 nfs4_stateid_copy(&data->stateid, stateid);
4091 data->res.fattr = &data->fattr;
4092 data->res.server = server;
4093 nfs_fattr_init(data->res.fattr);
4094 data->timestamp = jiffies;
4095 data->rpc_status = 0;
4097 task_setup_data.callback_data = data;
4098 msg.rpc_argp = &data->args;
4099 msg.rpc_resp = &data->res;
4100 task = rpc_run_task(&task_setup_data);
4102 return PTR_ERR(task);
4105 status = nfs4_wait_for_completion_rpc_task(task);
4108 status = data->rpc_status;
4110 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4112 nfs_refresh_inode(inode, &data->fattr);
4118 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4120 struct nfs_server *server = NFS_SERVER(inode);
4121 struct nfs4_exception exception = { };
4124 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4126 case -NFS4ERR_STALE_STATEID:
4127 case -NFS4ERR_EXPIRED:
4131 err = nfs4_handle_exception(server, err, &exception);
4132 } while (exception.retry);
4136 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4137 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4140 * sleep, with exponential backoff, and retry the LOCK operation.
4142 static unsigned long
4143 nfs4_set_lock_task_retry(unsigned long timeout)
4145 freezable_schedule_timeout_killable(timeout);
4147 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4148 return NFS4_LOCK_MAXTIMEOUT;
4152 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4154 struct inode *inode = state->inode;
4155 struct nfs_server *server = NFS_SERVER(inode);
4156 struct nfs_client *clp = server->nfs_client;
4157 struct nfs_lockt_args arg = {
4158 .fh = NFS_FH(inode),
4161 struct nfs_lockt_res res = {
4164 struct rpc_message msg = {
4165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4168 .rpc_cred = state->owner->so_cred,
4170 struct nfs4_lock_state *lsp;
4173 arg.lock_owner.clientid = clp->cl_clientid;
4174 status = nfs4_set_lock_state(state, request);
4177 lsp = request->fl_u.nfs4_fl.owner;
4178 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4179 arg.lock_owner.s_dev = server->s_dev;
4180 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4183 request->fl_type = F_UNLCK;
4185 case -NFS4ERR_DENIED:
4188 request->fl_ops->fl_release_private(request);
4193 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4195 struct nfs4_exception exception = { };
4199 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4200 _nfs4_proc_getlk(state, cmd, request),
4202 } while (exception.retry);
4206 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4209 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4211 res = posix_lock_file_wait(file, fl);
4214 res = flock_lock_file_wait(file, fl);
4222 struct nfs4_unlockdata {
4223 struct nfs_locku_args arg;
4224 struct nfs_locku_res res;
4225 struct nfs4_lock_state *lsp;
4226 struct nfs_open_context *ctx;
4227 struct file_lock fl;
4228 const struct nfs_server *server;
4229 unsigned long timestamp;
4232 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4233 struct nfs_open_context *ctx,
4234 struct nfs4_lock_state *lsp,
4235 struct nfs_seqid *seqid)
4237 struct nfs4_unlockdata *p;
4238 struct inode *inode = lsp->ls_state->inode;
4240 p = kzalloc(sizeof(*p), GFP_NOFS);
4243 p->arg.fh = NFS_FH(inode);
4245 p->arg.seqid = seqid;
4246 p->res.seqid = seqid;
4247 p->arg.stateid = &lsp->ls_stateid;
4249 atomic_inc(&lsp->ls_count);
4250 /* Ensure we don't close file until we're done freeing locks! */
4251 p->ctx = get_nfs_open_context(ctx);
4252 memcpy(&p->fl, fl, sizeof(p->fl));
4253 p->server = NFS_SERVER(inode);
4257 static void nfs4_locku_release_calldata(void *data)
4259 struct nfs4_unlockdata *calldata = data;
4260 nfs_free_seqid(calldata->arg.seqid);
4261 nfs4_put_lock_state(calldata->lsp);
4262 put_nfs_open_context(calldata->ctx);
4266 static void nfs4_locku_done(struct rpc_task *task, void *data)
4268 struct nfs4_unlockdata *calldata = data;
4270 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4272 switch (task->tk_status) {
4274 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4275 &calldata->res.stateid);
4276 renew_lease(calldata->server, calldata->timestamp);
4278 case -NFS4ERR_BAD_STATEID:
4279 case -NFS4ERR_OLD_STATEID:
4280 case -NFS4ERR_STALE_STATEID:
4281 case -NFS4ERR_EXPIRED:
4284 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4285 rpc_restart_call_prepare(task);
4289 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4291 struct nfs4_unlockdata *calldata = data;
4293 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4295 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4296 /* Note: exit _without_ running nfs4_locku_done */
4297 task->tk_action = NULL;
4300 calldata->timestamp = jiffies;
4301 if (nfs4_setup_sequence(calldata->server,
4302 &calldata->arg.seq_args,
4303 &calldata->res.seq_res, task))
4305 rpc_call_start(task);
4308 static const struct rpc_call_ops nfs4_locku_ops = {
4309 .rpc_call_prepare = nfs4_locku_prepare,
4310 .rpc_call_done = nfs4_locku_done,
4311 .rpc_release = nfs4_locku_release_calldata,
4314 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4315 struct nfs_open_context *ctx,
4316 struct nfs4_lock_state *lsp,
4317 struct nfs_seqid *seqid)
4319 struct nfs4_unlockdata *data;
4320 struct rpc_message msg = {
4321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4322 .rpc_cred = ctx->cred,
4324 struct rpc_task_setup task_setup_data = {
4325 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4326 .rpc_message = &msg,
4327 .callback_ops = &nfs4_locku_ops,
4328 .workqueue = nfsiod_workqueue,
4329 .flags = RPC_TASK_ASYNC,
4332 /* Ensure this is an unlock - when canceling a lock, the
4333 * canceled lock is passed in, and it won't be an unlock.
4335 fl->fl_type = F_UNLCK;
4337 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4339 nfs_free_seqid(seqid);
4340 return ERR_PTR(-ENOMEM);
4343 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4344 msg.rpc_argp = &data->arg;
4345 msg.rpc_resp = &data->res;
4346 task_setup_data.callback_data = data;
4347 return rpc_run_task(&task_setup_data);
4350 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4352 struct nfs_inode *nfsi = NFS_I(state->inode);
4353 struct nfs_seqid *seqid;
4354 struct nfs4_lock_state *lsp;
4355 struct rpc_task *task;
4357 unsigned char fl_flags = request->fl_flags;
4359 status = nfs4_set_lock_state(state, request);
4360 /* Unlock _before_ we do the RPC call */
4361 request->fl_flags |= FL_EXISTS;
4362 down_read(&nfsi->rwsem);
4363 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4364 up_read(&nfsi->rwsem);
4367 up_read(&nfsi->rwsem);
4370 /* Is this a delegated lock? */
4371 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4373 lsp = request->fl_u.nfs4_fl.owner;
4374 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4378 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4379 status = PTR_ERR(task);
4382 status = nfs4_wait_for_completion_rpc_task(task);
4385 request->fl_flags = fl_flags;
4389 struct nfs4_lockdata {
4390 struct nfs_lock_args arg;
4391 struct nfs_lock_res res;
4392 struct nfs4_lock_state *lsp;
4393 struct nfs_open_context *ctx;
4394 struct file_lock fl;
4395 unsigned long timestamp;
4398 struct nfs_server *server;
4401 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4402 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4405 struct nfs4_lockdata *p;
4406 struct inode *inode = lsp->ls_state->inode;
4407 struct nfs_server *server = NFS_SERVER(inode);
4409 p = kzalloc(sizeof(*p), gfp_mask);
4413 p->arg.fh = NFS_FH(inode);
4415 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4416 if (p->arg.open_seqid == NULL)
4418 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4419 if (p->arg.lock_seqid == NULL)
4420 goto out_free_seqid;
4421 p->arg.lock_stateid = &lsp->ls_stateid;
4422 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4423 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4424 p->arg.lock_owner.s_dev = server->s_dev;
4425 p->res.lock_seqid = p->arg.lock_seqid;
4428 atomic_inc(&lsp->ls_count);
4429 p->ctx = get_nfs_open_context(ctx);
4430 memcpy(&p->fl, fl, sizeof(p->fl));
4433 nfs_free_seqid(p->arg.open_seqid);
4439 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4441 struct nfs4_lockdata *data = calldata;
4442 struct nfs4_state *state = data->lsp->ls_state;
4444 dprintk("%s: begin!\n", __func__);
4445 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4447 /* Do we need to do an open_to_lock_owner? */
4448 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4449 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4451 data->arg.open_stateid = &state->stateid;
4452 data->arg.new_lock_owner = 1;
4453 data->res.open_seqid = data->arg.open_seqid;
4455 data->arg.new_lock_owner = 0;
4456 data->timestamp = jiffies;
4457 if (nfs4_setup_sequence(data->server,
4458 &data->arg.seq_args,
4459 &data->res.seq_res, task))
4461 rpc_call_start(task);
4462 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4465 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4467 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4468 nfs4_lock_prepare(task, calldata);
4471 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4473 struct nfs4_lockdata *data = calldata;
4475 dprintk("%s: begin!\n", __func__);
4477 if (!nfs4_sequence_done(task, &data->res.seq_res))
4480 data->rpc_status = task->tk_status;
4481 if (data->arg.new_lock_owner != 0) {
4482 if (data->rpc_status == 0)
4483 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4487 if (data->rpc_status == 0) {
4488 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4489 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4490 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4493 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4496 static void nfs4_lock_release(void *calldata)
4498 struct nfs4_lockdata *data = calldata;
4500 dprintk("%s: begin!\n", __func__);
4501 nfs_free_seqid(data->arg.open_seqid);
4502 if (data->cancelled != 0) {
4503 struct rpc_task *task;
4504 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4505 data->arg.lock_seqid);
4507 rpc_put_task_async(task);
4508 dprintk("%s: cancelling lock!\n", __func__);
4510 nfs_free_seqid(data->arg.lock_seqid);
4511 nfs4_put_lock_state(data->lsp);
4512 put_nfs_open_context(data->ctx);
4514 dprintk("%s: done!\n", __func__);
4517 static const struct rpc_call_ops nfs4_lock_ops = {
4518 .rpc_call_prepare = nfs4_lock_prepare,
4519 .rpc_call_done = nfs4_lock_done,
4520 .rpc_release = nfs4_lock_release,
4523 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4524 .rpc_call_prepare = nfs4_recover_lock_prepare,
4525 .rpc_call_done = nfs4_lock_done,
4526 .rpc_release = nfs4_lock_release,
4529 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4532 case -NFS4ERR_ADMIN_REVOKED:
4533 case -NFS4ERR_BAD_STATEID:
4534 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4535 if (new_lock_owner != 0 ||
4536 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4537 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4539 case -NFS4ERR_STALE_STATEID:
4540 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4541 case -NFS4ERR_EXPIRED:
4542 nfs4_schedule_lease_recovery(server->nfs_client);
4546 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4548 struct nfs4_lockdata *data;
4549 struct rpc_task *task;
4550 struct rpc_message msg = {
4551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4552 .rpc_cred = state->owner->so_cred,
4554 struct rpc_task_setup task_setup_data = {
4555 .rpc_client = NFS_CLIENT(state->inode),
4556 .rpc_message = &msg,
4557 .callback_ops = &nfs4_lock_ops,
4558 .workqueue = nfsiod_workqueue,
4559 .flags = RPC_TASK_ASYNC,
4563 dprintk("%s: begin!\n", __func__);
4564 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4565 fl->fl_u.nfs4_fl.owner,
4566 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4570 data->arg.block = 1;
4571 if (recovery_type > NFS_LOCK_NEW) {
4572 if (recovery_type == NFS_LOCK_RECLAIM)
4573 data->arg.reclaim = NFS_LOCK_RECLAIM;
4574 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4576 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4577 msg.rpc_argp = &data->arg;
4578 msg.rpc_resp = &data->res;
4579 task_setup_data.callback_data = data;
4580 task = rpc_run_task(&task_setup_data);
4582 return PTR_ERR(task);
4583 ret = nfs4_wait_for_completion_rpc_task(task);
4585 ret = data->rpc_status;
4587 nfs4_handle_setlk_error(data->server, data->lsp,
4588 data->arg.new_lock_owner, ret);
4590 data->cancelled = 1;
4592 dprintk("%s: done, ret = %d!\n", __func__, ret);
4596 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4598 struct nfs_server *server = NFS_SERVER(state->inode);
4599 struct nfs4_exception exception = {
4600 .inode = state->inode,
4605 /* Cache the lock if possible... */
4606 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4608 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4609 if (err != -NFS4ERR_DELAY)
4611 nfs4_handle_exception(server, err, &exception);
4612 } while (exception.retry);
4616 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4618 struct nfs_server *server = NFS_SERVER(state->inode);
4619 struct nfs4_exception exception = {
4620 .inode = state->inode,
4624 err = nfs4_set_lock_state(state, request);
4628 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4630 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4634 case -NFS4ERR_GRACE:
4635 case -NFS4ERR_DELAY:
4636 nfs4_handle_exception(server, err, &exception);
4639 } while (exception.retry);
4644 #if defined(CONFIG_NFS_V4_1)
4645 static int nfs41_check_expired_locks(struct nfs4_state *state)
4647 int status, ret = NFS_OK;
4648 struct nfs4_lock_state *lsp;
4649 struct nfs_server *server = NFS_SERVER(state->inode);
4651 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4652 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4653 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4654 if (status != NFS_OK) {
4655 nfs41_free_stateid(server, &lsp->ls_stateid);
4656 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4665 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4667 int status = NFS_OK;
4669 if (test_bit(LK_STATE_IN_USE, &state->flags))
4670 status = nfs41_check_expired_locks(state);
4671 if (status == NFS_OK)
4673 return nfs4_lock_expired(state, request);
4677 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4679 struct nfs_inode *nfsi = NFS_I(state->inode);
4680 unsigned char fl_flags = request->fl_flags;
4681 int status = -ENOLCK;
4683 if ((fl_flags & FL_POSIX) &&
4684 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4686 /* Is this a delegated open? */
4687 status = nfs4_set_lock_state(state, request);
4690 request->fl_flags |= FL_ACCESS;
4691 status = do_vfs_lock(request->fl_file, request);
4694 down_read(&nfsi->rwsem);
4695 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4696 /* Yes: cache locks! */
4697 /* ...but avoid races with delegation recall... */
4698 request->fl_flags = fl_flags & ~FL_SLEEP;
4699 status = do_vfs_lock(request->fl_file, request);
4702 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4705 /* Note: we always want to sleep here! */
4706 request->fl_flags = fl_flags | FL_SLEEP;
4707 if (do_vfs_lock(request->fl_file, request) < 0)
4708 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4709 "manager!\n", __func__);
4711 up_read(&nfsi->rwsem);
4713 request->fl_flags = fl_flags;
4717 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4719 struct nfs4_exception exception = {
4721 .inode = state->inode,
4726 err = _nfs4_proc_setlk(state, cmd, request);
4727 if (err == -NFS4ERR_DENIED)
4729 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4731 } while (exception.retry);
4736 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4738 struct nfs_open_context *ctx;
4739 struct nfs4_state *state;
4740 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4743 /* verify open state */
4744 ctx = nfs_file_open_context(filp);
4747 if (request->fl_start < 0 || request->fl_end < 0)
4750 if (IS_GETLK(cmd)) {
4752 return nfs4_proc_getlk(state, F_GETLK, request);
4756 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4759 if (request->fl_type == F_UNLCK) {
4761 return nfs4_proc_unlck(state, cmd, request);
4768 * Don't rely on the VFS having checked the file open mode,
4769 * since it won't do this for flock() locks.
4771 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4773 if (!(filp->f_mode & FMODE_READ))
4777 if (!(filp->f_mode & FMODE_WRITE))
4782 status = nfs4_proc_setlk(state, cmd, request);
4783 if ((status != -EAGAIN) || IS_SETLK(cmd))
4785 timeout = nfs4_set_lock_task_retry(timeout);
4786 status = -ERESTARTSYS;
4789 } while(status < 0);
4793 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4795 struct nfs_server *server = NFS_SERVER(state->inode);
4796 struct nfs4_exception exception = { };
4799 err = nfs4_set_lock_state(state, fl);
4803 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4806 printk(KERN_ERR "NFS: %s: unhandled error "
4807 "%d.\n", __func__, err);
4811 case -NFS4ERR_EXPIRED:
4812 nfs4_schedule_stateid_recovery(server, state);
4813 case -NFS4ERR_STALE_CLIENTID:
4814 case -NFS4ERR_STALE_STATEID:
4815 nfs4_schedule_lease_recovery(server->nfs_client);
4817 case -NFS4ERR_BADSESSION:
4818 case -NFS4ERR_BADSLOT:
4819 case -NFS4ERR_BAD_HIGH_SLOT:
4820 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4821 case -NFS4ERR_DEADSESSION:
4822 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4826 * The show must go on: exit, but mark the
4827 * stateid as needing recovery.
4829 case -NFS4ERR_DELEG_REVOKED:
4830 case -NFS4ERR_ADMIN_REVOKED:
4831 case -NFS4ERR_BAD_STATEID:
4832 case -NFS4ERR_OPENMODE:
4833 nfs4_schedule_stateid_recovery(server, state);
4838 * User RPCSEC_GSS context has expired.
4839 * We cannot recover this stateid now, so
4840 * skip it and allow recovery thread to
4846 case -NFS4ERR_DENIED:
4847 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4850 case -NFS4ERR_DELAY:
4853 err = nfs4_handle_exception(server, err, &exception);
4854 } while (exception.retry);
4859 struct nfs_release_lockowner_data {
4860 struct nfs4_lock_state *lsp;
4861 struct nfs_server *server;
4862 struct nfs_release_lockowner_args args;
4865 static void nfs4_release_lockowner_release(void *calldata)
4867 struct nfs_release_lockowner_data *data = calldata;
4868 nfs4_free_lock_state(data->server, data->lsp);
4872 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4873 .rpc_release = nfs4_release_lockowner_release,
4876 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4878 struct nfs_server *server = lsp->ls_state->owner->so_server;
4879 struct nfs_release_lockowner_data *data;
4880 struct rpc_message msg = {
4881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4884 if (server->nfs_client->cl_mvops->minor_version != 0)
4886 data = kmalloc(sizeof(*data), GFP_NOFS);
4890 data->server = server;
4891 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4892 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4893 data->args.lock_owner.s_dev = server->s_dev;
4894 msg.rpc_argp = &data->args;
4895 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4899 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4901 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4902 const void *buf, size_t buflen,
4903 int flags, int type)
4905 if (strcmp(key, "") != 0)
4908 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4911 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4912 void *buf, size_t buflen, int type)
4914 if (strcmp(key, "") != 0)
4917 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4920 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4921 size_t list_len, const char *name,
4922 size_t name_len, int type)
4924 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4926 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4929 if (list && len <= list_len)
4930 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4935 * nfs_fhget will use either the mounted_on_fileid or the fileid
4937 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4939 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4940 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4941 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4942 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4945 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4946 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4947 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4951 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4952 const struct qstr *name,
4953 struct nfs4_fs_locations *fs_locations,
4956 struct nfs_server *server = NFS_SERVER(dir);
4958 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4960 struct nfs4_fs_locations_arg args = {
4961 .dir_fh = NFS_FH(dir),
4966 struct nfs4_fs_locations_res res = {
4967 .fs_locations = fs_locations,
4969 struct rpc_message msg = {
4970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4976 dprintk("%s: start\n", __func__);
4978 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4979 * is not supported */
4980 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4981 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4983 bitmask[0] |= FATTR4_WORD0_FILEID;
4985 nfs_fattr_init(&fs_locations->fattr);
4986 fs_locations->server = server;
4987 fs_locations->nlocations = 0;
4988 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
4989 dprintk("%s: returned status = %d\n", __func__, status);
4993 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4994 const struct qstr *name,
4995 struct nfs4_fs_locations *fs_locations,
4998 struct nfs4_exception exception = { };
5001 err = nfs4_handle_exception(NFS_SERVER(dir),
5002 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5004 } while (exception.retry);
5008 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5011 struct nfs4_secinfo_arg args = {
5012 .dir_fh = NFS_FH(dir),
5015 struct nfs4_secinfo_res res = {
5018 struct rpc_message msg = {
5019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5024 dprintk("NFS call secinfo %s\n", name->name);
5025 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5026 dprintk("NFS reply secinfo: %d\n", status);
5030 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5031 struct nfs4_secinfo_flavors *flavors)
5033 struct nfs4_exception exception = { };
5036 err = nfs4_handle_exception(NFS_SERVER(dir),
5037 _nfs4_proc_secinfo(dir, name, flavors),
5039 } while (exception.retry);
5043 #ifdef CONFIG_NFS_V4_1
5045 * Check the exchange flags returned by the server for invalid flags, having
5046 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5049 static int nfs4_check_cl_exchange_flags(u32 flags)
5051 if (flags & ~EXCHGID4_FLAG_MASK_R)
5053 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5054 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5056 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5060 return -NFS4ERR_INVAL;
5064 nfs41_same_server_scope(struct nfs41_server_scope *a,
5065 struct nfs41_server_scope *b)
5067 if (a->server_scope_sz == b->server_scope_sz &&
5068 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5075 * nfs4_proc_exchange_id()
5077 * Since the clientid has expired, all compounds using sessions
5078 * associated with the stale clientid will be returning
5079 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5080 * be in some phase of session reset.
5082 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5084 nfs4_verifier verifier;
5085 struct nfs41_exchange_id_args args = {
5086 .verifier = &verifier,
5088 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5090 struct nfs41_exchange_id_res res = {
5094 struct rpc_message msg = {
5095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5101 dprintk("--> %s\n", __func__);
5102 BUG_ON(clp == NULL);
5104 nfs4_init_boot_verifier(clp, &verifier);
5106 args.id_len = scnprintf(args.id, sizeof(args.id),
5109 clp->cl_rpcclient->cl_nodename,
5110 clp->cl_rpcclient->cl_auth->au_flavor);
5112 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5114 if (unlikely(res.server_scope == NULL)) {
5119 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5120 if (unlikely(res.impl_id == NULL)) {
5122 goto out_server_scope;
5125 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5127 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
5130 /* use the most recent implementation id */
5131 kfree(clp->cl_implid);
5132 clp->cl_implid = res.impl_id;
5137 if (clp->cl_serverscope != NULL &&
5138 !nfs41_same_server_scope(clp->cl_serverscope,
5139 res.server_scope)) {
5140 dprintk("%s: server_scope mismatch detected\n",
5142 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5143 kfree(clp->cl_serverscope);
5144 clp->cl_serverscope = NULL;
5147 if (clp->cl_serverscope == NULL) {
5148 clp->cl_serverscope = res.server_scope;
5154 kfree(res.server_scope);
5156 if (clp->cl_implid != NULL)
5157 dprintk("%s: Server Implementation ID: "
5158 "domain: %s, name: %s, date: %llu,%u\n",
5159 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5160 clp->cl_implid->date.seconds,
5161 clp->cl_implid->date.nseconds);
5162 dprintk("<-- %s status= %d\n", __func__, status);
5166 struct nfs4_get_lease_time_data {
5167 struct nfs4_get_lease_time_args *args;
5168 struct nfs4_get_lease_time_res *res;
5169 struct nfs_client *clp;
5172 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5176 struct nfs4_get_lease_time_data *data =
5177 (struct nfs4_get_lease_time_data *)calldata;
5179 dprintk("--> %s\n", __func__);
5180 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5181 /* just setup sequence, do not trigger session recovery
5182 since we're invoked within one */
5183 ret = nfs41_setup_sequence(data->clp->cl_session,
5184 &data->args->la_seq_args,
5185 &data->res->lr_seq_res, task);
5187 BUG_ON(ret == -EAGAIN);
5188 rpc_call_start(task);
5189 dprintk("<-- %s\n", __func__);
5193 * Called from nfs4_state_manager thread for session setup, so don't recover
5194 * from sequence operation or clientid errors.
5196 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5198 struct nfs4_get_lease_time_data *data =
5199 (struct nfs4_get_lease_time_data *)calldata;
5201 dprintk("--> %s\n", __func__);
5202 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5204 switch (task->tk_status) {
5205 case -NFS4ERR_DELAY:
5206 case -NFS4ERR_GRACE:
5207 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5208 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5209 task->tk_status = 0;
5211 case -NFS4ERR_RETRY_UNCACHED_REP:
5212 rpc_restart_call_prepare(task);
5215 dprintk("<-- %s\n", __func__);
5218 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5219 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5220 .rpc_call_done = nfs4_get_lease_time_done,
5223 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5225 struct rpc_task *task;
5226 struct nfs4_get_lease_time_args args;
5227 struct nfs4_get_lease_time_res res = {
5228 .lr_fsinfo = fsinfo,
5230 struct nfs4_get_lease_time_data data = {
5235 struct rpc_message msg = {
5236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5240 struct rpc_task_setup task_setup = {
5241 .rpc_client = clp->cl_rpcclient,
5242 .rpc_message = &msg,
5243 .callback_ops = &nfs4_get_lease_time_ops,
5244 .callback_data = &data,
5245 .flags = RPC_TASK_TIMEOUT,
5249 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5250 dprintk("--> %s\n", __func__);
5251 task = rpc_run_task(&task_setup);
5254 status = PTR_ERR(task);
5256 status = task->tk_status;
5259 dprintk("<-- %s return %d\n", __func__, status);
5264 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5266 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5269 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5270 struct nfs4_slot *new,
5274 struct nfs4_slot *old = NULL;
5277 spin_lock(&tbl->slot_tbl_lock);
5281 tbl->max_slots = max_slots;
5283 tbl->highest_used_slotid = -1; /* no slot is currently used */
5284 for (i = 0; i < tbl->max_slots; i++)
5285 tbl->slots[i].seq_nr = ivalue;
5286 spin_unlock(&tbl->slot_tbl_lock);
5291 * (re)Initialise a slot table
5293 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5296 struct nfs4_slot *new = NULL;
5299 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5300 max_reqs, tbl->max_slots);
5302 /* Does the newly negotiated max_reqs match the existing slot table? */
5303 if (max_reqs != tbl->max_slots) {
5304 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5310 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5311 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5312 tbl, tbl->slots, tbl->max_slots);
5314 dprintk("<-- %s: return %d\n", __func__, ret);
5318 /* Destroy the slot table */
5319 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5321 if (session->fc_slot_table.slots != NULL) {
5322 kfree(session->fc_slot_table.slots);
5323 session->fc_slot_table.slots = NULL;
5325 if (session->bc_slot_table.slots != NULL) {
5326 kfree(session->bc_slot_table.slots);
5327 session->bc_slot_table.slots = NULL;
5333 * Initialize or reset the forechannel and backchannel tables
5335 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5337 struct nfs4_slot_table *tbl;
5340 dprintk("--> %s\n", __func__);
5342 tbl = &ses->fc_slot_table;
5343 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5344 if (status) /* -ENOMEM */
5347 tbl = &ses->bc_slot_table;
5348 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5349 if (status && tbl->slots == NULL)
5350 /* Fore and back channel share a connection so get
5351 * both slot tables or neither */
5352 nfs4_destroy_slot_tables(ses);
5356 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5358 struct nfs4_session *session;
5359 struct nfs4_slot_table *tbl;
5361 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5365 tbl = &session->fc_slot_table;
5366 tbl->highest_used_slotid = NFS4_NO_SLOT;
5367 spin_lock_init(&tbl->slot_tbl_lock);
5368 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5369 init_completion(&tbl->complete);
5371 tbl = &session->bc_slot_table;
5372 tbl->highest_used_slotid = NFS4_NO_SLOT;
5373 spin_lock_init(&tbl->slot_tbl_lock);
5374 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5375 init_completion(&tbl->complete);
5377 session->session_state = 1<<NFS4_SESSION_INITING;
5383 void nfs4_destroy_session(struct nfs4_session *session)
5385 struct rpc_xprt *xprt;
5387 nfs4_proc_destroy_session(session);
5390 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5392 dprintk("%s Destroy backchannel for xprt %p\n",
5394 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5395 nfs4_destroy_slot_tables(session);
5400 * Initialize the values to be used by the client in CREATE_SESSION
5401 * If nfs4_init_session set the fore channel request and response sizes,
5404 * Set the back channel max_resp_sz_cached to zero to force the client to
5405 * always set csa_cachethis to FALSE because the current implementation
5406 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5408 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5410 struct nfs4_session *session = args->client->cl_session;
5411 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5412 mxresp_sz = session->fc_attrs.max_resp_sz;
5415 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5417 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5418 /* Fore channel attributes */
5419 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5420 args->fc_attrs.max_resp_sz = mxresp_sz;
5421 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5422 args->fc_attrs.max_reqs = max_session_slots;
5424 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5425 "max_ops=%u max_reqs=%u\n",
5427 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5428 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5430 /* Back channel attributes */
5431 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5432 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5433 args->bc_attrs.max_resp_sz_cached = 0;
5434 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5435 args->bc_attrs.max_reqs = 1;
5437 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5438 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5440 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5441 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5442 args->bc_attrs.max_reqs);
5445 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5447 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5448 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5450 if (rcvd->max_resp_sz > sent->max_resp_sz)
5453 * Our requested max_ops is the minimum we need; we're not
5454 * prepared to break up compounds into smaller pieces than that.
5455 * So, no point even trying to continue if the server won't
5458 if (rcvd->max_ops < sent->max_ops)
5460 if (rcvd->max_reqs == 0)
5462 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5463 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5467 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5469 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5470 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5472 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5474 if (rcvd->max_resp_sz < sent->max_resp_sz)
5476 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5478 /* These would render the backchannel useless: */
5479 if (rcvd->max_ops != sent->max_ops)
5481 if (rcvd->max_reqs != sent->max_reqs)
5486 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5487 struct nfs4_session *session)
5491 ret = nfs4_verify_fore_channel_attrs(args, session);
5494 return nfs4_verify_back_channel_attrs(args, session);
5497 static int _nfs4_proc_create_session(struct nfs_client *clp)
5499 struct nfs4_session *session = clp->cl_session;
5500 struct nfs41_create_session_args args = {
5502 .cb_program = NFS4_CALLBACK,
5504 struct nfs41_create_session_res res = {
5507 struct rpc_message msg = {
5508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5514 nfs4_init_channel_attrs(&args);
5515 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5517 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5520 /* Verify the session's negotiated channel_attrs values */
5521 status = nfs4_verify_channel_attrs(&args, session);
5523 /* Increment the clientid slot sequence id */
5531 * Issues a CREATE_SESSION operation to the server.
5532 * It is the responsibility of the caller to verify the session is
5533 * expired before calling this routine.
5535 int nfs4_proc_create_session(struct nfs_client *clp)
5539 struct nfs4_session *session = clp->cl_session;
5541 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5543 status = _nfs4_proc_create_session(clp);
5547 /* Init or reset the session slot tables */
5548 status = nfs4_setup_session_slot_tables(session);
5549 dprintk("slot table setup returned %d\n", status);
5553 ptr = (unsigned *)&session->sess_id.data[0];
5554 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5555 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5557 dprintk("<-- %s\n", __func__);
5562 * Issue the over-the-wire RPC DESTROY_SESSION.
5563 * The caller must serialize access to this routine.
5565 int nfs4_proc_destroy_session(struct nfs4_session *session)
5568 struct rpc_message msg;
5570 dprintk("--> nfs4_proc_destroy_session\n");
5572 /* session is still being setup */
5573 if (session->clp->cl_cons_state != NFS_CS_READY)
5576 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5577 msg.rpc_argp = session;
5578 msg.rpc_resp = NULL;
5579 msg.rpc_cred = NULL;
5580 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5584 "NFS: Got error %d from the server on DESTROY_SESSION. "
5585 "Session has been destroyed regardless...\n", status);
5587 dprintk("<-- nfs4_proc_destroy_session\n");
5591 int nfs4_init_session(struct nfs_server *server)
5593 struct nfs_client *clp = server->nfs_client;
5594 struct nfs4_session *session;
5595 unsigned int rsize, wsize;
5598 if (!nfs4_has_session(clp))
5601 session = clp->cl_session;
5602 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5605 rsize = server->rsize;
5607 rsize = NFS_MAX_FILE_IO_SIZE;
5608 wsize = server->wsize;
5610 wsize = NFS_MAX_FILE_IO_SIZE;
5612 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5613 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5615 ret = nfs4_recover_expired_lease(server);
5617 ret = nfs4_check_client_ready(clp);
5621 int nfs4_init_ds_session(struct nfs_client *clp)
5623 struct nfs4_session *session = clp->cl_session;
5626 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5629 ret = nfs4_client_recover_expired_lease(clp);
5631 /* Test for the DS role */
5632 if (!is_ds_client(clp))
5635 ret = nfs4_check_client_ready(clp);
5639 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5643 * Renew the cl_session lease.
5645 struct nfs4_sequence_data {
5646 struct nfs_client *clp;
5647 struct nfs4_sequence_args args;
5648 struct nfs4_sequence_res res;
5651 static void nfs41_sequence_release(void *data)
5653 struct nfs4_sequence_data *calldata = data;
5654 struct nfs_client *clp = calldata->clp;
5656 if (atomic_read(&clp->cl_count) > 1)
5657 nfs4_schedule_state_renewal(clp);
5658 nfs_put_client(clp);
5662 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5664 switch(task->tk_status) {
5665 case -NFS4ERR_DELAY:
5666 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5669 nfs4_schedule_lease_recovery(clp);
5674 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5676 struct nfs4_sequence_data *calldata = data;
5677 struct nfs_client *clp = calldata->clp;
5679 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5682 if (task->tk_status < 0) {
5683 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5684 if (atomic_read(&clp->cl_count) == 1)
5687 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5688 rpc_restart_call_prepare(task);
5692 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5694 dprintk("<-- %s\n", __func__);
5697 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5699 struct nfs4_sequence_data *calldata = data;
5700 struct nfs_client *clp = calldata->clp;
5701 struct nfs4_sequence_args *args;
5702 struct nfs4_sequence_res *res;
5704 args = task->tk_msg.rpc_argp;
5705 res = task->tk_msg.rpc_resp;
5707 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5709 rpc_call_start(task);
5712 static const struct rpc_call_ops nfs41_sequence_ops = {
5713 .rpc_call_done = nfs41_sequence_call_done,
5714 .rpc_call_prepare = nfs41_sequence_prepare,
5715 .rpc_release = nfs41_sequence_release,
5718 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5720 struct nfs4_sequence_data *calldata;
5721 struct rpc_message msg = {
5722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5725 struct rpc_task_setup task_setup_data = {
5726 .rpc_client = clp->cl_rpcclient,
5727 .rpc_message = &msg,
5728 .callback_ops = &nfs41_sequence_ops,
5729 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5732 if (!atomic_inc_not_zero(&clp->cl_count))
5733 return ERR_PTR(-EIO);
5734 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5735 if (calldata == NULL) {
5736 nfs_put_client(clp);
5737 return ERR_PTR(-ENOMEM);
5739 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5740 msg.rpc_argp = &calldata->args;
5741 msg.rpc_resp = &calldata->res;
5742 calldata->clp = clp;
5743 task_setup_data.callback_data = calldata;
5745 return rpc_run_task(&task_setup_data);
5748 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5750 struct rpc_task *task;
5753 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5755 task = _nfs41_proc_sequence(clp, cred);
5757 ret = PTR_ERR(task);
5759 rpc_put_task_async(task);
5760 dprintk("<-- %s status=%d\n", __func__, ret);
5764 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5766 struct rpc_task *task;
5769 task = _nfs41_proc_sequence(clp, cred);
5771 ret = PTR_ERR(task);
5774 ret = rpc_wait_for_completion_task(task);
5776 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5778 if (task->tk_status == 0)
5779 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5780 ret = task->tk_status;
5784 dprintk("<-- %s status=%d\n", __func__, ret);
5788 struct nfs4_reclaim_complete_data {
5789 struct nfs_client *clp;
5790 struct nfs41_reclaim_complete_args arg;
5791 struct nfs41_reclaim_complete_res res;
5794 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5796 struct nfs4_reclaim_complete_data *calldata = data;
5798 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5799 if (nfs41_setup_sequence(calldata->clp->cl_session,
5800 &calldata->arg.seq_args,
5801 &calldata->res.seq_res, task))
5804 rpc_call_start(task);
5807 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5809 switch(task->tk_status) {
5811 case -NFS4ERR_COMPLETE_ALREADY:
5812 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5814 case -NFS4ERR_DELAY:
5815 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5817 case -NFS4ERR_RETRY_UNCACHED_REP:
5820 nfs4_schedule_lease_recovery(clp);
5825 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5827 struct nfs4_reclaim_complete_data *calldata = data;
5828 struct nfs_client *clp = calldata->clp;
5829 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5831 dprintk("--> %s\n", __func__);
5832 if (!nfs41_sequence_done(task, res))
5835 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5836 rpc_restart_call_prepare(task);
5839 dprintk("<-- %s\n", __func__);
5842 static void nfs4_free_reclaim_complete_data(void *data)
5844 struct nfs4_reclaim_complete_data *calldata = data;
5849 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5850 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5851 .rpc_call_done = nfs4_reclaim_complete_done,
5852 .rpc_release = nfs4_free_reclaim_complete_data,
5856 * Issue a global reclaim complete.
5858 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5860 struct nfs4_reclaim_complete_data *calldata;
5861 struct rpc_task *task;
5862 struct rpc_message msg = {
5863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5865 struct rpc_task_setup task_setup_data = {
5866 .rpc_client = clp->cl_rpcclient,
5867 .rpc_message = &msg,
5868 .callback_ops = &nfs4_reclaim_complete_call_ops,
5869 .flags = RPC_TASK_ASYNC,
5871 int status = -ENOMEM;
5873 dprintk("--> %s\n", __func__);
5874 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5875 if (calldata == NULL)
5877 calldata->clp = clp;
5878 calldata->arg.one_fs = 0;
5880 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5881 msg.rpc_argp = &calldata->arg;
5882 msg.rpc_resp = &calldata->res;
5883 task_setup_data.callback_data = calldata;
5884 task = rpc_run_task(&task_setup_data);
5886 status = PTR_ERR(task);
5889 status = nfs4_wait_for_completion_rpc_task(task);
5891 status = task->tk_status;
5895 dprintk("<-- %s status=%d\n", __func__, status);
5900 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5902 struct nfs4_layoutget *lgp = calldata;
5903 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5905 dprintk("--> %s\n", __func__);
5906 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5907 * right now covering the LAYOUTGET we are about to send.
5908 * However, that is not so catastrophic, and there seems
5909 * to be no way to prevent it completely.
5911 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5912 &lgp->res.seq_res, task))
5914 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5915 NFS_I(lgp->args.inode)->layout,
5916 lgp->args.ctx->state)) {
5917 rpc_exit(task, NFS4_OK);
5920 rpc_call_start(task);
5923 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5925 struct nfs4_layoutget *lgp = calldata;
5926 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5928 dprintk("--> %s\n", __func__);
5930 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5933 switch (task->tk_status) {
5936 case -NFS4ERR_LAYOUTTRYLATER:
5937 case -NFS4ERR_RECALLCONFLICT:
5938 task->tk_status = -NFS4ERR_DELAY;
5941 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5942 rpc_restart_call_prepare(task);
5946 dprintk("<-- %s\n", __func__);
5949 static void nfs4_layoutget_release(void *calldata)
5951 struct nfs4_layoutget *lgp = calldata;
5953 dprintk("--> %s\n", __func__);
5954 put_nfs_open_context(lgp->args.ctx);
5956 dprintk("<-- %s\n", __func__);
5959 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5960 .rpc_call_prepare = nfs4_layoutget_prepare,
5961 .rpc_call_done = nfs4_layoutget_done,
5962 .rpc_release = nfs4_layoutget_release,
5965 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5967 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5968 struct rpc_task *task;
5969 struct rpc_message msg = {
5970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5971 .rpc_argp = &lgp->args,
5972 .rpc_resp = &lgp->res,
5974 struct rpc_task_setup task_setup_data = {
5975 .rpc_client = server->client,
5976 .rpc_message = &msg,
5977 .callback_ops = &nfs4_layoutget_call_ops,
5978 .callback_data = lgp,
5979 .flags = RPC_TASK_ASYNC,
5983 dprintk("--> %s\n", __func__);
5985 lgp->res.layoutp = &lgp->args.layout;
5986 lgp->res.seq_res.sr_slot = NULL;
5987 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5988 task = rpc_run_task(&task_setup_data);
5990 return PTR_ERR(task);
5991 status = nfs4_wait_for_completion_rpc_task(task);
5993 status = task->tk_status;
5995 status = pnfs_layout_process(lgp);
5997 dprintk("<-- %s status=%d\n", __func__, status);
6002 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6004 struct nfs4_layoutreturn *lrp = calldata;
6006 dprintk("--> %s\n", __func__);
6007 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6008 &lrp->res.seq_res, task))
6010 rpc_call_start(task);
6013 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6015 struct nfs4_layoutreturn *lrp = calldata;
6016 struct nfs_server *server;
6017 struct pnfs_layout_hdr *lo = lrp->args.layout;
6019 dprintk("--> %s\n", __func__);
6021 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6024 server = NFS_SERVER(lrp->args.inode);
6025 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6026 rpc_restart_call_prepare(task);
6029 spin_lock(&lo->plh_inode->i_lock);
6030 if (task->tk_status == 0) {
6031 if (lrp->res.lrs_present) {
6032 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6034 BUG_ON(!list_empty(&lo->plh_segs));
6036 lo->plh_block_lgets--;
6037 spin_unlock(&lo->plh_inode->i_lock);
6038 dprintk("<-- %s\n", __func__);
6041 static void nfs4_layoutreturn_release(void *calldata)
6043 struct nfs4_layoutreturn *lrp = calldata;
6045 dprintk("--> %s\n", __func__);
6046 put_layout_hdr(lrp->args.layout);
6048 dprintk("<-- %s\n", __func__);
6051 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6052 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6053 .rpc_call_done = nfs4_layoutreturn_done,
6054 .rpc_release = nfs4_layoutreturn_release,
6057 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6059 struct rpc_task *task;
6060 struct rpc_message msg = {
6061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6062 .rpc_argp = &lrp->args,
6063 .rpc_resp = &lrp->res,
6065 struct rpc_task_setup task_setup_data = {
6066 .rpc_client = lrp->clp->cl_rpcclient,
6067 .rpc_message = &msg,
6068 .callback_ops = &nfs4_layoutreturn_call_ops,
6069 .callback_data = lrp,
6073 dprintk("--> %s\n", __func__);
6074 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6075 task = rpc_run_task(&task_setup_data);
6077 return PTR_ERR(task);
6078 status = task->tk_status;
6079 dprintk("<-- %s status=%d\n", __func__, status);
6085 * Retrieve the list of Data Server devices from the MDS.
6087 static int _nfs4_getdevicelist(struct nfs_server *server,
6088 const struct nfs_fh *fh,
6089 struct pnfs_devicelist *devlist)
6091 struct nfs4_getdevicelist_args args = {
6093 .layoutclass = server->pnfs_curr_ld->id,
6095 struct nfs4_getdevicelist_res res = {
6098 struct rpc_message msg = {
6099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6105 dprintk("--> %s\n", __func__);
6106 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6108 dprintk("<-- %s status=%d\n", __func__, status);
6112 int nfs4_proc_getdevicelist(struct nfs_server *server,
6113 const struct nfs_fh *fh,
6114 struct pnfs_devicelist *devlist)
6116 struct nfs4_exception exception = { };
6120 err = nfs4_handle_exception(server,
6121 _nfs4_getdevicelist(server, fh, devlist),
6123 } while (exception.retry);
6125 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6126 err, devlist->num_devs);
6130 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6133 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6135 struct nfs4_getdeviceinfo_args args = {
6138 struct nfs4_getdeviceinfo_res res = {
6141 struct rpc_message msg = {
6142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6148 dprintk("--> %s\n", __func__);
6149 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6150 dprintk("<-- %s status=%d\n", __func__, status);
6155 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6157 struct nfs4_exception exception = { };
6161 err = nfs4_handle_exception(server,
6162 _nfs4_proc_getdeviceinfo(server, pdev),
6164 } while (exception.retry);
6167 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6169 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6171 struct nfs4_layoutcommit_data *data = calldata;
6172 struct nfs_server *server = NFS_SERVER(data->args.inode);
6174 if (nfs4_setup_sequence(server, &data->args.seq_args,
6175 &data->res.seq_res, task))
6177 rpc_call_start(task);
6181 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6183 struct nfs4_layoutcommit_data *data = calldata;
6184 struct nfs_server *server = NFS_SERVER(data->args.inode);
6186 if (!nfs4_sequence_done(task, &data->res.seq_res))
6189 switch (task->tk_status) { /* Just ignore these failures */
6190 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6191 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6192 case -NFS4ERR_BADLAYOUT: /* no layout */
6193 case -NFS4ERR_GRACE: /* loca_recalim always false */
6194 task->tk_status = 0;
6197 nfs_post_op_update_inode_force_wcc(data->args.inode,
6201 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6202 rpc_restart_call_prepare(task);
6208 static void nfs4_layoutcommit_release(void *calldata)
6210 struct nfs4_layoutcommit_data *data = calldata;
6211 struct pnfs_layout_segment *lseg, *tmp;
6212 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6214 pnfs_cleanup_layoutcommit(data);
6215 /* Matched by references in pnfs_set_layoutcommit */
6216 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6217 list_del_init(&lseg->pls_lc_list);
6218 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6223 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6224 smp_mb__after_clear_bit();
6225 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6227 put_rpccred(data->cred);
6231 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6232 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6233 .rpc_call_done = nfs4_layoutcommit_done,
6234 .rpc_release = nfs4_layoutcommit_release,
6238 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6240 struct rpc_message msg = {
6241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6242 .rpc_argp = &data->args,
6243 .rpc_resp = &data->res,
6244 .rpc_cred = data->cred,
6246 struct rpc_task_setup task_setup_data = {
6247 .task = &data->task,
6248 .rpc_client = NFS_CLIENT(data->args.inode),
6249 .rpc_message = &msg,
6250 .callback_ops = &nfs4_layoutcommit_ops,
6251 .callback_data = data,
6252 .flags = RPC_TASK_ASYNC,
6254 struct rpc_task *task;
6257 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6258 "lbw: %llu inode %lu\n",
6259 data->task.tk_pid, sync,
6260 data->args.lastbytewritten,
6261 data->args.inode->i_ino);
6263 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6264 task = rpc_run_task(&task_setup_data);
6266 return PTR_ERR(task);
6269 status = nfs4_wait_for_completion_rpc_task(task);
6272 status = task->tk_status;
6274 dprintk("%s: status %d\n", __func__, status);
6280 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6281 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6283 struct nfs41_secinfo_no_name_args args = {
6284 .style = SECINFO_STYLE_CURRENT_FH,
6286 struct nfs4_secinfo_res res = {
6289 struct rpc_message msg = {
6290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6294 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6298 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6299 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6301 struct nfs4_exception exception = { };
6304 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6307 case -NFS4ERR_WRONGSEC:
6308 case -NFS4ERR_NOTSUPP:
6311 err = nfs4_handle_exception(server, err, &exception);
6313 } while (exception.retry);
6319 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6320 struct nfs_fsinfo *info)
6324 rpc_authflavor_t flavor;
6325 struct nfs4_secinfo_flavors *flavors;
6327 page = alloc_page(GFP_KERNEL);
6333 flavors = page_address(page);
6334 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6337 * Fall back on "guess and check" method if
6338 * the server doesn't support SECINFO_NO_NAME
6340 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6341 err = nfs4_find_root_sec(server, fhandle, info);
6347 flavor = nfs_find_best_sec(flavors);
6349 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6359 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6362 struct nfs41_test_stateid_args args = {
6365 struct nfs41_test_stateid_res res;
6366 struct rpc_message msg = {
6367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6372 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6373 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6375 if (status == NFS_OK)
6380 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6382 struct nfs4_exception exception = { };
6385 err = nfs4_handle_exception(server,
6386 _nfs41_test_stateid(server, stateid),
6388 } while (exception.retry);
6392 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6394 struct nfs41_free_stateid_args args = {
6397 struct nfs41_free_stateid_res res;
6398 struct rpc_message msg = {
6399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6404 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6405 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6408 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6410 struct nfs4_exception exception = { };
6413 err = nfs4_handle_exception(server,
6414 _nfs4_free_stateid(server, stateid),
6416 } while (exception.retry);
6420 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6421 const nfs4_stateid *s2)
6423 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6426 if (s1->seqid == s2->seqid)
6428 if (s1->seqid == 0 || s2->seqid == 0)
6434 #endif /* CONFIG_NFS_V4_1 */
6436 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6437 const nfs4_stateid *s2)
6439 return nfs4_stateid_match(s1, s2);
6443 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6444 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6445 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6446 .recover_open = nfs4_open_reclaim,
6447 .recover_lock = nfs4_lock_reclaim,
6448 .establish_clid = nfs4_init_clientid,
6449 .get_clid_cred = nfs4_get_setclientid_cred,
6452 #if defined(CONFIG_NFS_V4_1)
6453 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6454 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6455 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6456 .recover_open = nfs4_open_reclaim,
6457 .recover_lock = nfs4_lock_reclaim,
6458 .establish_clid = nfs41_init_clientid,
6459 .get_clid_cred = nfs4_get_exchange_id_cred,
6460 .reclaim_complete = nfs41_proc_reclaim_complete,
6462 #endif /* CONFIG_NFS_V4_1 */
6464 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6465 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6466 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6467 .recover_open = nfs4_open_expired,
6468 .recover_lock = nfs4_lock_expired,
6469 .establish_clid = nfs4_init_clientid,
6470 .get_clid_cred = nfs4_get_setclientid_cred,
6473 #if defined(CONFIG_NFS_V4_1)
6474 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6475 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6476 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6477 .recover_open = nfs41_open_expired,
6478 .recover_lock = nfs41_lock_expired,
6479 .establish_clid = nfs41_init_clientid,
6480 .get_clid_cred = nfs4_get_exchange_id_cred,
6482 #endif /* CONFIG_NFS_V4_1 */
6484 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6485 .sched_state_renewal = nfs4_proc_async_renew,
6486 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6487 .renew_lease = nfs4_proc_renew,
6490 #if defined(CONFIG_NFS_V4_1)
6491 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6492 .sched_state_renewal = nfs41_proc_async_sequence,
6493 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6494 .renew_lease = nfs4_proc_sequence,
6498 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6500 .call_sync = _nfs4_call_sync,
6501 .match_stateid = nfs4_match_stateid,
6502 .find_root_sec = nfs4_find_root_sec,
6503 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6504 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6505 .state_renewal_ops = &nfs40_state_renewal_ops,
6508 #if defined(CONFIG_NFS_V4_1)
6509 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6511 .call_sync = _nfs4_call_sync_session,
6512 .match_stateid = nfs41_match_stateid,
6513 .find_root_sec = nfs41_find_root_sec,
6514 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6515 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6516 .state_renewal_ops = &nfs41_state_renewal_ops,
6520 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6521 [0] = &nfs_v4_0_minor_ops,
6522 #if defined(CONFIG_NFS_V4_1)
6523 [1] = &nfs_v4_1_minor_ops,
6527 static const struct inode_operations nfs4_file_inode_operations = {
6528 .permission = nfs_permission,
6529 .getattr = nfs_getattr,
6530 .setattr = nfs_setattr,
6531 .getxattr = generic_getxattr,
6532 .setxattr = generic_setxattr,
6533 .listxattr = generic_listxattr,
6534 .removexattr = generic_removexattr,
6537 const struct nfs_rpc_ops nfs_v4_clientops = {
6538 .version = 4, /* protocol version */
6539 .dentry_ops = &nfs4_dentry_operations,
6540 .dir_inode_ops = &nfs4_dir_inode_operations,
6541 .file_inode_ops = &nfs4_file_inode_operations,
6542 .file_ops = &nfs4_file_operations,
6543 .getroot = nfs4_proc_get_root,
6544 .submount = nfs4_submount,
6545 .getattr = nfs4_proc_getattr,
6546 .setattr = nfs4_proc_setattr,
6547 .lookup = nfs4_proc_lookup,
6548 .access = nfs4_proc_access,
6549 .readlink = nfs4_proc_readlink,
6550 .create = nfs4_proc_create,
6551 .remove = nfs4_proc_remove,
6552 .unlink_setup = nfs4_proc_unlink_setup,
6553 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6554 .unlink_done = nfs4_proc_unlink_done,
6555 .rename = nfs4_proc_rename,
6556 .rename_setup = nfs4_proc_rename_setup,
6557 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6558 .rename_done = nfs4_proc_rename_done,
6559 .link = nfs4_proc_link,
6560 .symlink = nfs4_proc_symlink,
6561 .mkdir = nfs4_proc_mkdir,
6562 .rmdir = nfs4_proc_remove,
6563 .readdir = nfs4_proc_readdir,
6564 .mknod = nfs4_proc_mknod,
6565 .statfs = nfs4_proc_statfs,
6566 .fsinfo = nfs4_proc_fsinfo,
6567 .pathconf = nfs4_proc_pathconf,
6568 .set_capabilities = nfs4_server_capabilities,
6569 .decode_dirent = nfs4_decode_dirent,
6570 .read_setup = nfs4_proc_read_setup,
6571 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6572 .read_done = nfs4_read_done,
6573 .write_setup = nfs4_proc_write_setup,
6574 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6575 .write_done = nfs4_write_done,
6576 .commit_setup = nfs4_proc_commit_setup,
6577 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6578 .commit_done = nfs4_commit_done,
6579 .lock = nfs4_proc_lock,
6580 .clear_acl_cache = nfs4_zap_acl_attr,
6581 .close_context = nfs4_close_context,
6582 .open_context = nfs4_atomic_open,
6583 .init_client = nfs4_init_client,
6586 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6587 .prefix = XATTR_NAME_NFSV4_ACL,
6588 .list = nfs4_xattr_list_nfs4_acl,
6589 .get = nfs4_xattr_get_nfs4_acl,
6590 .set = nfs4_xattr_set_nfs4_acl,
6593 const struct xattr_handler *nfs4_xattr_handlers[] = {
6594 &nfs4_xattr_nfs4_acl_handler,
6598 module_param(max_session_slots, ushort, 0644);
6599 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6600 "requests the client will negotiate");