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:
106 case -NFS4ERR_SHARE_DENIED:
108 case -NFS4ERR_MINOR_VERS_MISMATCH:
109 return -EPROTONOSUPPORT;
111 dprintk("%s could not handle NFSv4 error %d\n",
119 * This is our standard bitmap for GETATTR requests.
121 const u32 nfs4_fattr_bitmap[3] = {
123 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_FILEID,
128 | FATTR4_WORD1_NUMLINKS
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
138 static const u32 nfs4_pnfs_open_bitmap[3] = {
140 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_FILEID,
145 | FATTR4_WORD1_NUMLINKS
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
156 const u32 nfs4_statfs_bitmap[2] = {
157 FATTR4_WORD0_FILES_AVAIL
158 | FATTR4_WORD0_FILES_FREE
159 | FATTR4_WORD0_FILES_TOTAL,
160 FATTR4_WORD1_SPACE_AVAIL
161 | FATTR4_WORD1_SPACE_FREE
162 | FATTR4_WORD1_SPACE_TOTAL
165 const u32 nfs4_pathconf_bitmap[2] = {
167 | FATTR4_WORD0_MAXNAME,
171 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
172 | FATTR4_WORD0_MAXREAD
173 | FATTR4_WORD0_MAXWRITE
174 | FATTR4_WORD0_LEASE_TIME,
175 FATTR4_WORD1_TIME_DELTA
176 | FATTR4_WORD1_FS_LAYOUT_TYPES,
177 FATTR4_WORD2_LAYOUT_BLKSIZE
180 const u32 nfs4_fs_locations_bitmap[2] = {
182 | FATTR4_WORD0_CHANGE
185 | FATTR4_WORD0_FILEID
186 | FATTR4_WORD0_FS_LOCATIONS,
188 | FATTR4_WORD1_NUMLINKS
190 | FATTR4_WORD1_OWNER_GROUP
191 | FATTR4_WORD1_RAWDEV
192 | FATTR4_WORD1_SPACE_USED
193 | FATTR4_WORD1_TIME_ACCESS
194 | FATTR4_WORD1_TIME_METADATA
195 | FATTR4_WORD1_TIME_MODIFY
196 | FATTR4_WORD1_MOUNTED_ON_FILEID
199 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
200 struct nfs4_readdir_arg *readdir)
204 BUG_ON(readdir->count < 80);
206 readdir->cookie = cookie;
207 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
212 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
217 * NFSv4 servers do not return entries for '.' and '..'
218 * Therefore, we fake these entries here. We let '.'
219 * have cookie 0 and '..' have cookie 1. Note that
220 * when talking to the server, we always send cookie 0
223 start = p = kmap_atomic(*readdir->pages);
226 *p++ = xdr_one; /* next */
227 *p++ = xdr_zero; /* cookie, first word */
228 *p++ = xdr_one; /* cookie, second word */
229 *p++ = xdr_one; /* entry len */
230 memcpy(p, ".\0\0\0", 4); /* entry */
232 *p++ = xdr_one; /* bitmap length */
233 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
234 *p++ = htonl(8); /* attribute buffer length */
235 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
238 *p++ = xdr_one; /* next */
239 *p++ = xdr_zero; /* cookie, first word */
240 *p++ = xdr_two; /* cookie, second word */
241 *p++ = xdr_two; /* entry len */
242 memcpy(p, "..\0\0", 4); /* entry */
244 *p++ = xdr_one; /* bitmap length */
245 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
246 *p++ = htonl(8); /* attribute buffer length */
247 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
249 readdir->pgbase = (char *)p - (char *)start;
250 readdir->count -= readdir->pgbase;
251 kunmap_atomic(start);
254 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
260 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
261 nfs_wait_bit_killable, TASK_KILLABLE);
265 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
272 *timeout = NFS4_POLL_RETRY_MIN;
273 if (*timeout > NFS4_POLL_RETRY_MAX)
274 *timeout = NFS4_POLL_RETRY_MAX;
275 freezable_schedule_timeout_killable(*timeout);
276 if (fatal_signal_pending(current))
282 /* This is the error handling routine for processes that are allowed
285 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
287 struct nfs_client *clp = server->nfs_client;
288 struct nfs4_state *state = exception->state;
289 struct inode *inode = exception->inode;
292 exception->retry = 0;
296 case -NFS4ERR_OPENMODE:
297 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
298 nfs_inode_return_delegation(inode);
299 exception->retry = 1;
304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
306 case -NFS4ERR_DELEG_REVOKED:
307 case -NFS4ERR_ADMIN_REVOKED:
308 case -NFS4ERR_BAD_STATEID:
311 nfs_remove_bad_delegation(state->inode);
312 nfs4_schedule_stateid_recovery(server, state);
313 goto wait_on_recovery;
314 case -NFS4ERR_EXPIRED:
316 nfs4_schedule_stateid_recovery(server, state);
317 case -NFS4ERR_STALE_STATEID:
318 case -NFS4ERR_STALE_CLIENTID:
319 nfs4_schedule_lease_recovery(clp);
320 goto wait_on_recovery;
321 #if defined(CONFIG_NFS_V4_1)
322 case -NFS4ERR_BADSESSION:
323 case -NFS4ERR_BADSLOT:
324 case -NFS4ERR_BAD_HIGH_SLOT:
325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
326 case -NFS4ERR_DEADSESSION:
327 case -NFS4ERR_SEQ_FALSE_RETRY:
328 case -NFS4ERR_SEQ_MISORDERED:
329 dprintk("%s ERROR: %d Reset session\n", __func__,
331 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
332 exception->retry = 1;
334 #endif /* defined(CONFIG_NFS_V4_1) */
335 case -NFS4ERR_FILE_OPEN:
336 if (exception->timeout > HZ) {
337 /* We have retried a decent amount, time to
346 ret = nfs4_delay(server->client, &exception->timeout);
349 case -NFS4ERR_RETRY_UNCACHED_REP:
350 case -NFS4ERR_OLD_STATEID:
351 exception->retry = 1;
353 case -NFS4ERR_BADOWNER:
354 /* The following works around a Linux server bug! */
355 case -NFS4ERR_BADNAME:
356 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
357 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
358 exception->retry = 1;
359 printk(KERN_WARNING "NFS: v4 server %s "
360 "does not accept raw "
362 "Reenabling the idmapper.\n",
363 server->nfs_client->cl_hostname);
366 /* We failed to handle the error */
367 return nfs4_map_errors(ret);
369 ret = nfs4_wait_clnt_recover(clp);
371 exception->retry = 1;
376 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
378 spin_lock(&clp->cl_lock);
379 if (time_before(clp->cl_last_renewal,timestamp))
380 clp->cl_last_renewal = timestamp;
381 spin_unlock(&clp->cl_lock);
384 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
386 do_renew_lease(server->nfs_client, timestamp);
389 #if defined(CONFIG_NFS_V4_1)
392 * nfs4_free_slot - free a slot and efficiently update slot table.
394 * freeing a slot is trivially done by clearing its respective bit
396 * If the freed slotid equals highest_used_slotid we want to update it
397 * so that the server would be able to size down the slot table if needed,
398 * otherwise we know that the highest_used_slotid is still in use.
399 * When updating highest_used_slotid there may be "holes" in the bitmap
400 * so we need to scan down from highest_used_slotid to 0 looking for the now
401 * highest slotid in use.
402 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
404 * Must be called while holding tbl->slot_tbl_lock
407 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
409 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
410 /* clear used bit in bitmap */
411 __clear_bit(slotid, tbl->used_slots);
413 /* update highest_used_slotid when it is freed */
414 if (slotid == tbl->highest_used_slotid) {
415 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
416 if (slotid < tbl->max_slots)
417 tbl->highest_used_slotid = slotid;
419 tbl->highest_used_slotid = NFS4_NO_SLOT;
421 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
422 slotid, tbl->highest_used_slotid);
425 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
427 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
432 * Signal state manager thread if session fore channel is drained
434 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
436 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
437 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
438 nfs4_set_task_privileged, NULL);
442 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
445 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
446 complete(&ses->fc_slot_table.complete);
450 * Signal state manager thread if session back channel is drained
452 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
454 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
455 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
457 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
458 complete(&ses->bc_slot_table.complete);
461 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
463 struct nfs4_slot_table *tbl;
465 tbl = &res->sr_session->fc_slot_table;
467 /* just wake up the next guy waiting since
468 * we may have not consumed a slot after all */
469 dprintk("%s: No slot\n", __func__);
473 spin_lock(&tbl->slot_tbl_lock);
474 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
475 nfs4_check_drain_fc_complete(res->sr_session);
476 spin_unlock(&tbl->slot_tbl_lock);
480 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
482 unsigned long timestamp;
483 struct nfs_client *clp;
486 * sr_status remains 1 if an RPC level error occurred. The server
487 * may or may not have processed the sequence operation..
488 * Proceed as if the server received and processed the sequence
491 if (res->sr_status == 1)
492 res->sr_status = NFS_OK;
494 /* don't increment the sequence number if the task wasn't sent */
495 if (!RPC_WAS_SENT(task))
498 /* Check the SEQUENCE operation status */
499 switch (res->sr_status) {
501 /* Update the slot's sequence and clientid lease timer */
502 ++res->sr_slot->seq_nr;
503 timestamp = res->sr_renewal_time;
504 clp = res->sr_session->clp;
505 do_renew_lease(clp, timestamp);
506 /* Check sequence flags */
507 if (res->sr_status_flags != 0)
508 nfs4_schedule_lease_recovery(clp);
511 /* The server detected a resend of the RPC call and
512 * returned NFS4ERR_DELAY as per Section 2.10.6.2
515 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
517 res->sr_slot - res->sr_session->fc_slot_table.slots,
518 res->sr_slot->seq_nr);
521 /* Just update the slot sequence no. */
522 ++res->sr_slot->seq_nr;
525 /* The session may be reset by one of the error handlers. */
526 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
527 nfs41_sequence_free_slot(res);
530 if (!rpc_restart_call(task))
532 rpc_delay(task, NFS4_POLL_RETRY_MAX);
536 static int nfs4_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
539 if (res->sr_session == NULL)
541 return nfs41_sequence_done(task, res);
545 * nfs4_find_slot - efficiently look for a free slot
547 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
548 * If found, we mark the slot as used, update the highest_used_slotid,
549 * and respectively set up the sequence operation args.
550 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
552 * Note: must be called with under the slot_tbl_lock.
555 nfs4_find_slot(struct nfs4_slot_table *tbl)
558 u32 ret_id = NFS4_NO_SLOT;
560 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
561 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
563 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
564 if (slotid >= tbl->max_slots)
566 __set_bit(slotid, tbl->used_slots);
567 if (slotid > tbl->highest_used_slotid ||
568 tbl->highest_used_slotid == NFS4_NO_SLOT)
569 tbl->highest_used_slotid = slotid;
572 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
573 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
577 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res, int cache_reply)
580 args->sa_session = NULL;
581 args->sa_cache_this = 0;
583 args->sa_cache_this = 1;
584 res->sr_session = NULL;
588 int nfs41_setup_sequence(struct nfs4_session *session,
589 struct nfs4_sequence_args *args,
590 struct nfs4_sequence_res *res,
591 struct rpc_task *task)
593 struct nfs4_slot *slot;
594 struct nfs4_slot_table *tbl;
597 dprintk("--> %s\n", __func__);
598 /* slot already allocated? */
599 if (res->sr_slot != NULL)
602 tbl = &session->fc_slot_table;
604 spin_lock(&tbl->slot_tbl_lock);
605 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
606 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
607 /* The state manager will wait until the slot table is empty */
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
609 spin_unlock(&tbl->slot_tbl_lock);
610 dprintk("%s session is draining\n", __func__);
614 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
615 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
616 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
617 spin_unlock(&tbl->slot_tbl_lock);
618 dprintk("%s enforce FIFO order\n", __func__);
622 slotid = nfs4_find_slot(tbl);
623 if (slotid == NFS4_NO_SLOT) {
624 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
625 spin_unlock(&tbl->slot_tbl_lock);
626 dprintk("<-- %s: no free slots\n", __func__);
629 spin_unlock(&tbl->slot_tbl_lock);
631 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
632 slot = tbl->slots + slotid;
633 args->sa_session = session;
634 args->sa_slotid = slotid;
636 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
638 res->sr_session = session;
640 res->sr_renewal_time = jiffies;
641 res->sr_status_flags = 0;
643 * sr_status is only set in decode_sequence, and so will remain
644 * set to 1 if an rpc level failure occurs.
649 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
651 int nfs4_setup_sequence(const struct nfs_server *server,
652 struct nfs4_sequence_args *args,
653 struct nfs4_sequence_res *res,
654 struct rpc_task *task)
656 struct nfs4_session *session = nfs4_get_session(server);
662 dprintk("--> %s clp %p session %p sr_slot %td\n",
663 __func__, session->clp, session, res->sr_slot ?
664 res->sr_slot - session->fc_slot_table.slots : -1);
666 ret = nfs41_setup_sequence(session, args, res, task);
668 dprintk("<-- %s status=%d\n", __func__, ret);
672 struct nfs41_call_sync_data {
673 const struct nfs_server *seq_server;
674 struct nfs4_sequence_args *seq_args;
675 struct nfs4_sequence_res *seq_res;
678 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
680 struct nfs41_call_sync_data *data = calldata;
682 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
684 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
685 data->seq_res, task))
687 rpc_call_start(task);
690 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
692 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
693 nfs41_call_sync_prepare(task, calldata);
696 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
698 struct nfs41_call_sync_data *data = calldata;
700 nfs41_sequence_done(task, data->seq_res);
703 static const struct rpc_call_ops nfs41_call_sync_ops = {
704 .rpc_call_prepare = nfs41_call_sync_prepare,
705 .rpc_call_done = nfs41_call_sync_done,
708 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
709 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
710 .rpc_call_done = nfs41_call_sync_done,
713 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
714 struct nfs_server *server,
715 struct rpc_message *msg,
716 struct nfs4_sequence_args *args,
717 struct nfs4_sequence_res *res,
721 struct rpc_task *task;
722 struct nfs41_call_sync_data data = {
723 .seq_server = server,
727 struct rpc_task_setup task_setup = {
730 .callback_ops = &nfs41_call_sync_ops,
731 .callback_data = &data
735 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
736 task = rpc_run_task(&task_setup);
740 ret = task->tk_status;
746 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
747 struct nfs_server *server,
748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
753 nfs41_init_sequence(args, res, cache_reply);
754 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
759 void nfs41_init_sequence(struct nfs4_sequence_args *args,
760 struct nfs4_sequence_res *res, int cache_reply)
764 static int nfs4_sequence_done(struct rpc_task *task,
765 struct nfs4_sequence_res *res)
769 #endif /* CONFIG_NFS_V4_1 */
771 int _nfs4_call_sync(struct rpc_clnt *clnt,
772 struct nfs_server *server,
773 struct rpc_message *msg,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
778 nfs41_init_sequence(args, res, cache_reply);
779 return rpc_call_sync(clnt, msg, 0);
783 int nfs4_call_sync(struct rpc_clnt *clnt,
784 struct nfs_server *server,
785 struct rpc_message *msg,
786 struct nfs4_sequence_args *args,
787 struct nfs4_sequence_res *res,
790 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
791 args, res, cache_reply);
794 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
796 struct nfs_inode *nfsi = NFS_I(dir);
798 spin_lock(&dir->i_lock);
799 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
800 if (!cinfo->atomic || cinfo->before != dir->i_version)
801 nfs_force_lookup_revalidate(dir);
802 dir->i_version = cinfo->after;
803 spin_unlock(&dir->i_lock);
806 struct nfs4_opendata {
808 struct nfs_openargs o_arg;
809 struct nfs_openres o_res;
810 struct nfs_open_confirmargs c_arg;
811 struct nfs_open_confirmres c_res;
812 struct nfs4_string owner_name;
813 struct nfs4_string group_name;
814 struct nfs_fattr f_attr;
816 struct dentry *dentry;
817 struct nfs4_state_owner *owner;
818 struct nfs4_state *state;
820 unsigned long timestamp;
821 unsigned int rpc_done : 1;
827 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
829 p->o_res.f_attr = &p->f_attr;
830 p->o_res.seqid = p->o_arg.seqid;
831 p->c_res.seqid = p->c_arg.seqid;
832 p->o_res.server = p->o_arg.server;
833 nfs_fattr_init(&p->f_attr);
834 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
837 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
838 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
839 const struct iattr *attrs,
842 struct dentry *parent = dget_parent(dentry);
843 struct inode *dir = parent->d_inode;
844 struct nfs_server *server = NFS_SERVER(dir);
845 struct nfs4_opendata *p;
847 p = kzalloc(sizeof(*p), gfp_mask);
850 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
851 if (p->o_arg.seqid == NULL)
853 nfs_sb_active(dentry->d_sb);
854 p->dentry = dget(dentry);
857 atomic_inc(&sp->so_count);
858 p->o_arg.fh = NFS_FH(dir);
859 p->o_arg.open_flags = flags;
860 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
861 p->o_arg.clientid = server->nfs_client->cl_clientid;
862 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
863 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
864 p->o_arg.name = &dentry->d_name;
865 p->o_arg.server = server;
866 p->o_arg.bitmask = server->attr_bitmask;
867 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
868 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
869 if (attrs != NULL && attrs->ia_valid != 0) {
872 p->o_arg.u.attrs = &p->attrs;
873 memcpy(&p->attrs, attrs, sizeof(p->attrs));
876 verf[1] = current->pid;
877 memcpy(p->o_arg.u.verifier.data, verf,
878 sizeof(p->o_arg.u.verifier.data));
880 p->c_arg.fh = &p->o_res.fh;
881 p->c_arg.stateid = &p->o_res.stateid;
882 p->c_arg.seqid = p->o_arg.seqid;
883 nfs4_init_opendata_res(p);
893 static void nfs4_opendata_free(struct kref *kref)
895 struct nfs4_opendata *p = container_of(kref,
896 struct nfs4_opendata, kref);
897 struct super_block *sb = p->dentry->d_sb;
899 nfs_free_seqid(p->o_arg.seqid);
900 if (p->state != NULL)
901 nfs4_put_open_state(p->state);
902 nfs4_put_state_owner(p->owner);
906 nfs_fattr_free_names(&p->f_attr);
910 static void nfs4_opendata_put(struct nfs4_opendata *p)
913 kref_put(&p->kref, nfs4_opendata_free);
916 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
920 ret = rpc_wait_for_completion_task(task);
924 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
928 if (open_mode & (O_EXCL|O_TRUNC))
930 switch (mode & (FMODE_READ|FMODE_WRITE)) {
932 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
933 && state->n_rdonly != 0;
936 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
937 && state->n_wronly != 0;
939 case FMODE_READ|FMODE_WRITE:
940 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
941 && state->n_rdwr != 0;
947 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
949 if (delegation == NULL)
951 if ((delegation->type & fmode) != fmode)
953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
955 nfs_mark_delegation_referenced(delegation);
959 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
968 case FMODE_READ|FMODE_WRITE:
971 nfs4_state_set_mode_locked(state, state->state | fmode);
974 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
976 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
977 nfs4_stateid_copy(&state->stateid, stateid);
978 nfs4_stateid_copy(&state->open_stateid, stateid);
981 set_bit(NFS_O_RDONLY_STATE, &state->flags);
984 set_bit(NFS_O_WRONLY_STATE, &state->flags);
986 case FMODE_READ|FMODE_WRITE:
987 set_bit(NFS_O_RDWR_STATE, &state->flags);
991 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
993 write_seqlock(&state->seqlock);
994 nfs_set_open_stateid_locked(state, stateid, fmode);
995 write_sequnlock(&state->seqlock);
998 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1001 * Protect the call to nfs4_state_set_mode_locked and
1002 * serialise the stateid update
1004 write_seqlock(&state->seqlock);
1005 if (deleg_stateid != NULL) {
1006 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1007 set_bit(NFS_DELEGATED_STATE, &state->flags);
1009 if (open_stateid != NULL)
1010 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1011 write_sequnlock(&state->seqlock);
1012 spin_lock(&state->owner->so_lock);
1013 update_open_stateflags(state, fmode);
1014 spin_unlock(&state->owner->so_lock);
1017 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1019 struct nfs_inode *nfsi = NFS_I(state->inode);
1020 struct nfs_delegation *deleg_cur;
1023 fmode &= (FMODE_READ|FMODE_WRITE);
1026 deleg_cur = rcu_dereference(nfsi->delegation);
1027 if (deleg_cur == NULL)
1030 spin_lock(&deleg_cur->lock);
1031 if (nfsi->delegation != deleg_cur ||
1032 (deleg_cur->type & fmode) != fmode)
1033 goto no_delegation_unlock;
1035 if (delegation == NULL)
1036 delegation = &deleg_cur->stateid;
1037 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1038 goto no_delegation_unlock;
1040 nfs_mark_delegation_referenced(deleg_cur);
1041 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1043 no_delegation_unlock:
1044 spin_unlock(&deleg_cur->lock);
1048 if (!ret && open_stateid != NULL) {
1049 __update_open_stateid(state, open_stateid, NULL, fmode);
1057 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1059 struct nfs_delegation *delegation;
1062 delegation = rcu_dereference(NFS_I(inode)->delegation);
1063 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1068 nfs_inode_return_delegation(inode);
1071 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1073 struct nfs4_state *state = opendata->state;
1074 struct nfs_inode *nfsi = NFS_I(state->inode);
1075 struct nfs_delegation *delegation;
1076 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1077 fmode_t fmode = opendata->o_arg.fmode;
1078 nfs4_stateid stateid;
1082 if (can_open_cached(state, fmode, open_mode)) {
1083 spin_lock(&state->owner->so_lock);
1084 if (can_open_cached(state, fmode, open_mode)) {
1085 update_open_stateflags(state, fmode);
1086 spin_unlock(&state->owner->so_lock);
1087 goto out_return_state;
1089 spin_unlock(&state->owner->so_lock);
1092 delegation = rcu_dereference(nfsi->delegation);
1093 if (!can_open_delegated(delegation, fmode)) {
1097 /* Save the delegation */
1098 nfs4_stateid_copy(&stateid, &delegation->stateid);
1100 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1105 /* Try to update the stateid using the delegation */
1106 if (update_open_stateid(state, NULL, &stateid, fmode))
1107 goto out_return_state;
1110 return ERR_PTR(ret);
1112 atomic_inc(&state->count);
1116 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1118 struct inode *inode;
1119 struct nfs4_state *state = NULL;
1120 struct nfs_delegation *delegation;
1123 if (!data->rpc_done) {
1124 state = nfs4_try_open_cached(data);
1129 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1131 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1132 ret = PTR_ERR(inode);
1136 state = nfs4_get_open_state(inode, data->owner);
1139 if (data->o_res.delegation_type != 0) {
1140 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1141 int delegation_flags = 0;
1144 delegation = rcu_dereference(NFS_I(inode)->delegation);
1146 delegation_flags = delegation->flags;
1148 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1149 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1150 "returning a delegation for "
1151 "OPEN(CLAIM_DELEGATE_CUR)\n",
1153 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1154 nfs_inode_set_delegation(state->inode,
1155 data->owner->so_cred,
1158 nfs_inode_reclaim_delegation(state->inode,
1159 data->owner->so_cred,
1163 update_open_stateid(state, &data->o_res.stateid, NULL,
1171 return ERR_PTR(ret);
1174 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1176 struct nfs_inode *nfsi = NFS_I(state->inode);
1177 struct nfs_open_context *ctx;
1179 spin_lock(&state->inode->i_lock);
1180 list_for_each_entry(ctx, &nfsi->open_files, list) {
1181 if (ctx->state != state)
1183 get_nfs_open_context(ctx);
1184 spin_unlock(&state->inode->i_lock);
1187 spin_unlock(&state->inode->i_lock);
1188 return ERR_PTR(-ENOENT);
1191 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1193 struct nfs4_opendata *opendata;
1195 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1196 if (opendata == NULL)
1197 return ERR_PTR(-ENOMEM);
1198 opendata->state = state;
1199 atomic_inc(&state->count);
1203 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1205 struct nfs4_state *newstate;
1208 opendata->o_arg.open_flags = 0;
1209 opendata->o_arg.fmode = fmode;
1210 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1211 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1212 nfs4_init_opendata_res(opendata);
1213 ret = _nfs4_recover_proc_open(opendata);
1216 newstate = nfs4_opendata_to_nfs4_state(opendata);
1217 if (IS_ERR(newstate))
1218 return PTR_ERR(newstate);
1219 nfs4_close_state(newstate, fmode);
1224 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1226 struct nfs4_state *newstate;
1229 /* memory barrier prior to reading state->n_* */
1230 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1232 if (state->n_rdwr != 0) {
1233 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1234 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1237 if (newstate != state)
1240 if (state->n_wronly != 0) {
1241 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1242 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1245 if (newstate != state)
1248 if (state->n_rdonly != 0) {
1249 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1250 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1253 if (newstate != state)
1257 * We may have performed cached opens for all three recoveries.
1258 * Check if we need to update the current stateid.
1260 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1261 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1262 write_seqlock(&state->seqlock);
1263 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1264 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1265 write_sequnlock(&state->seqlock);
1272 * reclaim state on the server after a reboot.
1274 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1276 struct nfs_delegation *delegation;
1277 struct nfs4_opendata *opendata;
1278 fmode_t delegation_type = 0;
1281 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1282 if (IS_ERR(opendata))
1283 return PTR_ERR(opendata);
1284 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1285 opendata->o_arg.fh = NFS_FH(state->inode);
1287 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1288 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1289 delegation_type = delegation->type;
1291 opendata->o_arg.u.delegation_type = delegation_type;
1292 status = nfs4_open_recover(opendata, state);
1293 nfs4_opendata_put(opendata);
1297 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1299 struct nfs_server *server = NFS_SERVER(state->inode);
1300 struct nfs4_exception exception = { };
1303 err = _nfs4_do_open_reclaim(ctx, state);
1304 if (err != -NFS4ERR_DELAY)
1306 nfs4_handle_exception(server, err, &exception);
1307 } while (exception.retry);
1311 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1313 struct nfs_open_context *ctx;
1316 ctx = nfs4_state_find_open_context(state);
1318 return PTR_ERR(ctx);
1319 ret = nfs4_do_open_reclaim(ctx, state);
1320 put_nfs_open_context(ctx);
1324 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1326 struct nfs4_opendata *opendata;
1329 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1330 if (IS_ERR(opendata))
1331 return PTR_ERR(opendata);
1332 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1333 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1334 ret = nfs4_open_recover(opendata, state);
1335 nfs4_opendata_put(opendata);
1339 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1341 struct nfs4_exception exception = { };
1342 struct nfs_server *server = NFS_SERVER(state->inode);
1345 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1351 case -NFS4ERR_BADSESSION:
1352 case -NFS4ERR_BADSLOT:
1353 case -NFS4ERR_BAD_HIGH_SLOT:
1354 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1355 case -NFS4ERR_DEADSESSION:
1356 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1358 case -NFS4ERR_STALE_CLIENTID:
1359 case -NFS4ERR_STALE_STATEID:
1360 case -NFS4ERR_EXPIRED:
1361 /* Don't recall a delegation if it was lost */
1362 nfs4_schedule_lease_recovery(server->nfs_client);
1366 * The show must go on: exit, but mark the
1367 * stateid as needing recovery.
1369 case -NFS4ERR_DELEG_REVOKED:
1370 case -NFS4ERR_ADMIN_REVOKED:
1371 case -NFS4ERR_BAD_STATEID:
1372 nfs_inode_find_state_and_recover(state->inode,
1374 nfs4_schedule_stateid_recovery(server, state);
1377 * User RPCSEC_GSS context has expired.
1378 * We cannot recover this stateid now, so
1379 * skip it and allow recovery thread to
1386 err = nfs4_handle_exception(server, err, &exception);
1387 } while (exception.retry);
1392 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1394 struct nfs4_opendata *data = calldata;
1396 data->rpc_status = task->tk_status;
1397 if (data->rpc_status == 0) {
1398 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1399 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1400 renew_lease(data->o_res.server, data->timestamp);
1405 static void nfs4_open_confirm_release(void *calldata)
1407 struct nfs4_opendata *data = calldata;
1408 struct nfs4_state *state = NULL;
1410 /* If this request hasn't been cancelled, do nothing */
1411 if (data->cancelled == 0)
1413 /* In case of error, no cleanup! */
1414 if (!data->rpc_done)
1416 state = nfs4_opendata_to_nfs4_state(data);
1418 nfs4_close_state(state, data->o_arg.fmode);
1420 nfs4_opendata_put(data);
1423 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1424 .rpc_call_done = nfs4_open_confirm_done,
1425 .rpc_release = nfs4_open_confirm_release,
1429 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1431 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1433 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1434 struct rpc_task *task;
1435 struct rpc_message msg = {
1436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1437 .rpc_argp = &data->c_arg,
1438 .rpc_resp = &data->c_res,
1439 .rpc_cred = data->owner->so_cred,
1441 struct rpc_task_setup task_setup_data = {
1442 .rpc_client = server->client,
1443 .rpc_message = &msg,
1444 .callback_ops = &nfs4_open_confirm_ops,
1445 .callback_data = data,
1446 .workqueue = nfsiod_workqueue,
1447 .flags = RPC_TASK_ASYNC,
1451 kref_get(&data->kref);
1453 data->rpc_status = 0;
1454 data->timestamp = jiffies;
1455 task = rpc_run_task(&task_setup_data);
1457 return PTR_ERR(task);
1458 status = nfs4_wait_for_completion_rpc_task(task);
1460 data->cancelled = 1;
1463 status = data->rpc_status;
1468 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1470 struct nfs4_opendata *data = calldata;
1471 struct nfs4_state_owner *sp = data->owner;
1473 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1476 * Check if we still need to send an OPEN call, or if we can use
1477 * a delegation instead.
1479 if (data->state != NULL) {
1480 struct nfs_delegation *delegation;
1482 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1485 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1486 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1487 can_open_delegated(delegation, data->o_arg.fmode))
1488 goto unlock_no_action;
1491 /* Update client id. */
1492 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1493 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1494 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1495 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1497 data->timestamp = jiffies;
1498 if (nfs4_setup_sequence(data->o_arg.server,
1499 &data->o_arg.seq_args,
1500 &data->o_res.seq_res, task))
1502 rpc_call_start(task);
1507 task->tk_action = NULL;
1511 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1513 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1514 nfs4_open_prepare(task, calldata);
1517 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1519 struct nfs4_opendata *data = calldata;
1521 data->rpc_status = task->tk_status;
1523 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1526 if (task->tk_status == 0) {
1527 switch (data->o_res.f_attr->mode & S_IFMT) {
1531 data->rpc_status = -ELOOP;
1534 data->rpc_status = -EISDIR;
1537 data->rpc_status = -ENOTDIR;
1539 renew_lease(data->o_res.server, data->timestamp);
1540 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1541 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1546 static void nfs4_open_release(void *calldata)
1548 struct nfs4_opendata *data = calldata;
1549 struct nfs4_state *state = NULL;
1551 /* If this request hasn't been cancelled, do nothing */
1552 if (data->cancelled == 0)
1554 /* In case of error, no cleanup! */
1555 if (data->rpc_status != 0 || !data->rpc_done)
1557 /* In case we need an open_confirm, no cleanup! */
1558 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1560 state = nfs4_opendata_to_nfs4_state(data);
1562 nfs4_close_state(state, data->o_arg.fmode);
1564 nfs4_opendata_put(data);
1567 static const struct rpc_call_ops nfs4_open_ops = {
1568 .rpc_call_prepare = nfs4_open_prepare,
1569 .rpc_call_done = nfs4_open_done,
1570 .rpc_release = nfs4_open_release,
1573 static const struct rpc_call_ops nfs4_recover_open_ops = {
1574 .rpc_call_prepare = nfs4_recover_open_prepare,
1575 .rpc_call_done = nfs4_open_done,
1576 .rpc_release = nfs4_open_release,
1579 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1581 struct inode *dir = data->dir->d_inode;
1582 struct nfs_server *server = NFS_SERVER(dir);
1583 struct nfs_openargs *o_arg = &data->o_arg;
1584 struct nfs_openres *o_res = &data->o_res;
1585 struct rpc_task *task;
1586 struct rpc_message msg = {
1587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1590 .rpc_cred = data->owner->so_cred,
1592 struct rpc_task_setup task_setup_data = {
1593 .rpc_client = server->client,
1594 .rpc_message = &msg,
1595 .callback_ops = &nfs4_open_ops,
1596 .callback_data = data,
1597 .workqueue = nfsiod_workqueue,
1598 .flags = RPC_TASK_ASYNC,
1602 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1603 kref_get(&data->kref);
1605 data->rpc_status = 0;
1606 data->cancelled = 0;
1608 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1609 task = rpc_run_task(&task_setup_data);
1611 return PTR_ERR(task);
1612 status = nfs4_wait_for_completion_rpc_task(task);
1614 data->cancelled = 1;
1617 status = data->rpc_status;
1623 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1625 struct inode *dir = data->dir->d_inode;
1626 struct nfs_openres *o_res = &data->o_res;
1629 status = nfs4_run_open_task(data, 1);
1630 if (status != 0 || !data->rpc_done)
1633 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1635 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1636 status = _nfs4_proc_open_confirm(data);
1645 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1647 static int _nfs4_proc_open(struct nfs4_opendata *data)
1649 struct inode *dir = data->dir->d_inode;
1650 struct nfs_server *server = NFS_SERVER(dir);
1651 struct nfs_openargs *o_arg = &data->o_arg;
1652 struct nfs_openres *o_res = &data->o_res;
1655 status = nfs4_run_open_task(data, 0);
1656 if (!data->rpc_done)
1659 if (status == -NFS4ERR_BADNAME &&
1660 !(o_arg->open_flags & O_CREAT))
1665 nfs_fattr_map_and_free_names(server, &data->f_attr);
1667 if (o_arg->open_flags & O_CREAT)
1668 update_changeattr(dir, &o_res->cinfo);
1669 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1670 server->caps &= ~NFS_CAP_POSIX_LOCK;
1671 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1672 status = _nfs4_proc_open_confirm(data);
1676 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1677 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1681 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1686 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1687 ret = nfs4_wait_clnt_recover(clp);
1690 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1691 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1693 nfs4_schedule_state_manager(clp);
1699 static int nfs4_recover_expired_lease(struct nfs_server *server)
1701 return nfs4_client_recover_expired_lease(server->nfs_client);
1706 * reclaim state on the server after a network partition.
1707 * Assumes caller holds the appropriate lock
1709 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1711 struct nfs4_opendata *opendata;
1714 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1715 if (IS_ERR(opendata))
1716 return PTR_ERR(opendata);
1717 ret = nfs4_open_recover(opendata, state);
1719 d_drop(ctx->dentry);
1720 nfs4_opendata_put(opendata);
1724 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1726 struct nfs_server *server = NFS_SERVER(state->inode);
1727 struct nfs4_exception exception = { };
1731 err = _nfs4_open_expired(ctx, state);
1735 case -NFS4ERR_GRACE:
1736 case -NFS4ERR_DELAY:
1737 nfs4_handle_exception(server, err, &exception);
1740 } while (exception.retry);
1745 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1747 struct nfs_open_context *ctx;
1750 ctx = nfs4_state_find_open_context(state);
1752 return PTR_ERR(ctx);
1753 ret = nfs4_do_open_expired(ctx, state);
1754 put_nfs_open_context(ctx);
1758 #if defined(CONFIG_NFS_V4_1)
1759 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1761 int status = NFS_OK;
1762 struct nfs_server *server = NFS_SERVER(state->inode);
1764 if (state->flags & flags) {
1765 status = nfs41_test_stateid(server, stateid);
1766 if (status != NFS_OK) {
1767 nfs41_free_stateid(server, stateid);
1768 state->flags &= ~flags;
1774 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1776 int deleg_status, open_status;
1777 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1778 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1780 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1781 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1783 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1785 return nfs4_open_expired(sp, state);
1790 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1791 * fields corresponding to attributes that were used to store the verifier.
1792 * Make sure we clobber those fields in the later setattr call
1794 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1796 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1797 !(sattr->ia_valid & ATTR_ATIME_SET))
1798 sattr->ia_valid |= ATTR_ATIME;
1800 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1801 !(sattr->ia_valid & ATTR_MTIME_SET))
1802 sattr->ia_valid |= ATTR_MTIME;
1806 * Returns a referenced nfs4_state
1808 static int _nfs4_do_open(struct inode *dir,
1809 struct dentry *dentry,
1812 struct iattr *sattr,
1813 struct rpc_cred *cred,
1814 struct nfs4_state **res,
1815 struct nfs4_threshold **ctx_th)
1817 struct nfs4_state_owner *sp;
1818 struct nfs4_state *state = NULL;
1819 struct nfs_server *server = NFS_SERVER(dir);
1820 struct nfs4_opendata *opendata;
1823 /* Protect against reboot recovery conflicts */
1825 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1827 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1830 status = nfs4_recover_expired_lease(server);
1832 goto err_put_state_owner;
1833 if (dentry->d_inode != NULL)
1834 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1836 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1837 if (opendata == NULL)
1838 goto err_put_state_owner;
1840 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1841 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1842 if (!opendata->f_attr.mdsthreshold)
1843 goto err_opendata_put;
1844 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1846 if (dentry->d_inode != NULL)
1847 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1849 status = _nfs4_proc_open(opendata);
1851 goto err_opendata_put;
1853 state = nfs4_opendata_to_nfs4_state(opendata);
1854 status = PTR_ERR(state);
1856 goto err_opendata_put;
1857 if (server->caps & NFS_CAP_POSIX_LOCK)
1858 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1860 if (opendata->o_arg.open_flags & O_EXCL) {
1861 nfs4_exclusive_attrset(opendata, sattr);
1863 nfs_fattr_init(opendata->o_res.f_attr);
1864 status = nfs4_do_setattr(state->inode, cred,
1865 opendata->o_res.f_attr, sattr,
1868 nfs_setattr_update_inode(state->inode, sattr);
1869 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1872 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1873 *ctx_th = opendata->f_attr.mdsthreshold;
1875 kfree(opendata->f_attr.mdsthreshold);
1876 opendata->f_attr.mdsthreshold = NULL;
1878 nfs4_opendata_put(opendata);
1879 nfs4_put_state_owner(sp);
1883 kfree(opendata->f_attr.mdsthreshold);
1884 nfs4_opendata_put(opendata);
1885 err_put_state_owner:
1886 nfs4_put_state_owner(sp);
1893 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1894 struct dentry *dentry,
1897 struct iattr *sattr,
1898 struct rpc_cred *cred,
1899 struct nfs4_threshold **ctx_th)
1901 struct nfs4_exception exception = { };
1902 struct nfs4_state *res;
1905 fmode &= FMODE_READ|FMODE_WRITE;
1907 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1911 /* NOTE: BAD_SEQID means the server and client disagree about the
1912 * book-keeping w.r.t. state-changing operations
1913 * (OPEN/CLOSE/LOCK/LOCKU...)
1914 * It is actually a sign of a bug on the client or on the server.
1916 * If we receive a BAD_SEQID error in the particular case of
1917 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1918 * have unhashed the old state_owner for us, and that we can
1919 * therefore safely retry using a new one. We should still warn
1920 * the user though...
1922 if (status == -NFS4ERR_BAD_SEQID) {
1923 pr_warn_ratelimited("NFS: v4 server %s "
1924 " returned a bad sequence-id error!\n",
1925 NFS_SERVER(dir)->nfs_client->cl_hostname);
1926 exception.retry = 1;
1930 * BAD_STATEID on OPEN means that the server cancelled our
1931 * state before it received the OPEN_CONFIRM.
1932 * Recover by retrying the request as per the discussion
1933 * on Page 181 of RFC3530.
1935 if (status == -NFS4ERR_BAD_STATEID) {
1936 exception.retry = 1;
1939 if (status == -EAGAIN) {
1940 /* We must have found a delegation */
1941 exception.retry = 1;
1944 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1945 status, &exception));
1946 } while (exception.retry);
1950 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1951 struct nfs_fattr *fattr, struct iattr *sattr,
1952 struct nfs4_state *state)
1954 struct nfs_server *server = NFS_SERVER(inode);
1955 struct nfs_setattrargs arg = {
1956 .fh = NFS_FH(inode),
1959 .bitmask = server->attr_bitmask,
1961 struct nfs_setattrres res = {
1965 struct rpc_message msg = {
1966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1971 unsigned long timestamp = jiffies;
1974 nfs_fattr_init(fattr);
1976 if (state != NULL) {
1977 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1978 current->files, current->tgid);
1979 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1981 /* Use that stateid */
1983 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1985 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1986 if (status == 0 && state != NULL)
1987 renew_lease(server, timestamp);
1991 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1992 struct nfs_fattr *fattr, struct iattr *sattr,
1993 struct nfs4_state *state)
1995 struct nfs_server *server = NFS_SERVER(inode);
1996 struct nfs4_exception exception = {
2002 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2004 case -NFS4ERR_OPENMODE:
2005 if (state && !(state->state & FMODE_WRITE)) {
2007 if (sattr->ia_valid & ATTR_OPEN)
2012 err = nfs4_handle_exception(server, err, &exception);
2013 } while (exception.retry);
2018 struct nfs4_closedata {
2019 struct inode *inode;
2020 struct nfs4_state *state;
2021 struct nfs_closeargs arg;
2022 struct nfs_closeres res;
2023 struct nfs_fattr fattr;
2024 unsigned long timestamp;
2029 static void nfs4_free_closedata(void *data)
2031 struct nfs4_closedata *calldata = data;
2032 struct nfs4_state_owner *sp = calldata->state->owner;
2033 struct super_block *sb = calldata->state->inode->i_sb;
2036 pnfs_roc_release(calldata->state->inode);
2037 nfs4_put_open_state(calldata->state);
2038 nfs_free_seqid(calldata->arg.seqid);
2039 nfs4_put_state_owner(sp);
2040 nfs_sb_deactive(sb);
2044 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2047 spin_lock(&state->owner->so_lock);
2048 if (!(fmode & FMODE_READ))
2049 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2050 if (!(fmode & FMODE_WRITE))
2051 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2052 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2053 spin_unlock(&state->owner->so_lock);
2056 static void nfs4_close_done(struct rpc_task *task, void *data)
2058 struct nfs4_closedata *calldata = data;
2059 struct nfs4_state *state = calldata->state;
2060 struct nfs_server *server = NFS_SERVER(calldata->inode);
2062 dprintk("%s: begin!\n", __func__);
2063 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2065 /* hmm. we are done with the inode, and in the process of freeing
2066 * the state_owner. we keep this around to process errors
2068 switch (task->tk_status) {
2071 pnfs_roc_set_barrier(state->inode,
2072 calldata->roc_barrier);
2073 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2074 renew_lease(server, calldata->timestamp);
2075 nfs4_close_clear_stateid_flags(state,
2076 calldata->arg.fmode);
2078 case -NFS4ERR_STALE_STATEID:
2079 case -NFS4ERR_OLD_STATEID:
2080 case -NFS4ERR_BAD_STATEID:
2081 case -NFS4ERR_EXPIRED:
2082 if (calldata->arg.fmode == 0)
2085 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2086 rpc_restart_call_prepare(task);
2088 nfs_release_seqid(calldata->arg.seqid);
2089 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2090 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2093 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2095 struct nfs4_closedata *calldata = data;
2096 struct nfs4_state *state = calldata->state;
2099 dprintk("%s: begin!\n", __func__);
2100 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2103 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2104 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2105 spin_lock(&state->owner->so_lock);
2106 /* Calculate the change in open mode */
2107 if (state->n_rdwr == 0) {
2108 if (state->n_rdonly == 0) {
2109 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2110 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2111 calldata->arg.fmode &= ~FMODE_READ;
2113 if (state->n_wronly == 0) {
2114 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2115 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2116 calldata->arg.fmode &= ~FMODE_WRITE;
2119 spin_unlock(&state->owner->so_lock);
2122 /* Note: exit _without_ calling nfs4_close_done */
2123 task->tk_action = NULL;
2127 if (calldata->arg.fmode == 0) {
2128 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2129 if (calldata->roc &&
2130 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2131 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2137 nfs_fattr_init(calldata->res.fattr);
2138 calldata->timestamp = jiffies;
2139 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2140 &calldata->arg.seq_args,
2141 &calldata->res.seq_res,
2144 rpc_call_start(task);
2146 dprintk("%s: done!\n", __func__);
2149 static const struct rpc_call_ops nfs4_close_ops = {
2150 .rpc_call_prepare = nfs4_close_prepare,
2151 .rpc_call_done = nfs4_close_done,
2152 .rpc_release = nfs4_free_closedata,
2156 * It is possible for data to be read/written from a mem-mapped file
2157 * after the sys_close call (which hits the vfs layer as a flush).
2158 * This means that we can't safely call nfsv4 close on a file until
2159 * the inode is cleared. This in turn means that we are not good
2160 * NFSv4 citizens - we do not indicate to the server to update the file's
2161 * share state even when we are done with one of the three share
2162 * stateid's in the inode.
2164 * NOTE: Caller must be holding the sp->so_owner semaphore!
2166 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2168 struct nfs_server *server = NFS_SERVER(state->inode);
2169 struct nfs4_closedata *calldata;
2170 struct nfs4_state_owner *sp = state->owner;
2171 struct rpc_task *task;
2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2174 .rpc_cred = state->owner->so_cred,
2176 struct rpc_task_setup task_setup_data = {
2177 .rpc_client = server->client,
2178 .rpc_message = &msg,
2179 .callback_ops = &nfs4_close_ops,
2180 .workqueue = nfsiod_workqueue,
2181 .flags = RPC_TASK_ASYNC,
2183 int status = -ENOMEM;
2185 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2186 if (calldata == NULL)
2188 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2189 calldata->inode = state->inode;
2190 calldata->state = state;
2191 calldata->arg.fh = NFS_FH(state->inode);
2192 calldata->arg.stateid = &state->open_stateid;
2193 /* Serialization for the sequence id */
2194 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2195 if (calldata->arg.seqid == NULL)
2196 goto out_free_calldata;
2197 calldata->arg.fmode = 0;
2198 calldata->arg.bitmask = server->cache_consistency_bitmask;
2199 calldata->res.fattr = &calldata->fattr;
2200 calldata->res.seqid = calldata->arg.seqid;
2201 calldata->res.server = server;
2202 calldata->roc = roc;
2203 nfs_sb_active(calldata->inode->i_sb);
2205 msg.rpc_argp = &calldata->arg;
2206 msg.rpc_resp = &calldata->res;
2207 task_setup_data.callback_data = calldata;
2208 task = rpc_run_task(&task_setup_data);
2210 return PTR_ERR(task);
2213 status = rpc_wait_for_completion_task(task);
2220 pnfs_roc_release(state->inode);
2221 nfs4_put_open_state(state);
2222 nfs4_put_state_owner(sp);
2226 static struct inode *
2227 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2229 struct nfs4_state *state;
2231 /* Protect against concurrent sillydeletes */
2232 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2233 ctx->cred, &ctx->mdsthreshold);
2235 return ERR_CAST(state);
2237 return igrab(state->inode);
2240 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2242 if (ctx->state == NULL)
2245 nfs4_close_sync(ctx->state, ctx->mode);
2247 nfs4_close_state(ctx->state, ctx->mode);
2250 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2252 struct nfs4_server_caps_arg args = {
2255 struct nfs4_server_caps_res res = {};
2256 struct rpc_message msg = {
2257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2263 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2265 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2266 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2267 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2268 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2269 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2270 NFS_CAP_CTIME|NFS_CAP_MTIME);
2271 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2272 server->caps |= NFS_CAP_ACLS;
2273 if (res.has_links != 0)
2274 server->caps |= NFS_CAP_HARDLINKS;
2275 if (res.has_symlinks != 0)
2276 server->caps |= NFS_CAP_SYMLINKS;
2277 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2278 server->caps |= NFS_CAP_FILEID;
2279 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2280 server->caps |= NFS_CAP_MODE;
2281 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2282 server->caps |= NFS_CAP_NLINK;
2283 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2284 server->caps |= NFS_CAP_OWNER;
2285 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2286 server->caps |= NFS_CAP_OWNER_GROUP;
2287 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2288 server->caps |= NFS_CAP_ATIME;
2289 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2290 server->caps |= NFS_CAP_CTIME;
2291 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2292 server->caps |= NFS_CAP_MTIME;
2294 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2295 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2296 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2297 server->acl_bitmask = res.acl_bitmask;
2298 server->fh_expire_type = res.fh_expire_type;
2304 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2306 struct nfs4_exception exception = { };
2309 err = nfs4_handle_exception(server,
2310 _nfs4_server_capabilities(server, fhandle),
2312 } while (exception.retry);
2316 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2317 struct nfs_fsinfo *info)
2319 struct nfs4_lookup_root_arg args = {
2320 .bitmask = nfs4_fattr_bitmap,
2322 struct nfs4_lookup_res res = {
2324 .fattr = info->fattr,
2327 struct rpc_message msg = {
2328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2333 nfs_fattr_init(info->fattr);
2334 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2337 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2338 struct nfs_fsinfo *info)
2340 struct nfs4_exception exception = { };
2343 err = _nfs4_lookup_root(server, fhandle, info);
2346 case -NFS4ERR_WRONGSEC:
2349 err = nfs4_handle_exception(server, err, &exception);
2351 } while (exception.retry);
2356 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2357 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2359 struct rpc_auth *auth;
2362 auth = rpcauth_create(flavor, server->client);
2367 ret = nfs4_lookup_root(server, fhandle, info);
2372 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2373 struct nfs_fsinfo *info)
2375 int i, len, status = 0;
2376 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2378 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2379 flav_array[len] = RPC_AUTH_NULL;
2382 for (i = 0; i < len; i++) {
2383 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2384 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2389 * -EACCESS could mean that the user doesn't have correct permissions
2390 * to access the mount. It could also mean that we tried to mount
2391 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2392 * existing mount programs don't handle -EACCES very well so it should
2393 * be mapped to -EPERM instead.
2395 if (status == -EACCES)
2401 * get the file handle for the "/" directory on the server
2403 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2404 struct nfs_fsinfo *info)
2406 int minor_version = server->nfs_client->cl_minorversion;
2407 int status = nfs4_lookup_root(server, fhandle, info);
2408 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2410 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2411 * by nfs4_map_errors() as this function exits.
2413 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2415 status = nfs4_server_capabilities(server, fhandle);
2417 status = nfs4_do_fsinfo(server, fhandle, info);
2418 return nfs4_map_errors(status);
2421 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2422 struct nfs_fsinfo *info)
2425 struct nfs_fattr *fattr = info->fattr;
2427 error = nfs4_server_capabilities(server, mntfh);
2429 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2433 error = nfs4_proc_getattr(server, mntfh, fattr);
2435 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2439 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2440 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2441 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2447 * Get locations and (maybe) other attributes of a referral.
2448 * Note that we'll actually follow the referral later when
2449 * we detect fsid mismatch in inode revalidation
2451 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2452 const struct qstr *name, struct nfs_fattr *fattr,
2453 struct nfs_fh *fhandle)
2455 int status = -ENOMEM;
2456 struct page *page = NULL;
2457 struct nfs4_fs_locations *locations = NULL;
2459 page = alloc_page(GFP_KERNEL);
2462 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2463 if (locations == NULL)
2466 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2469 /* Make sure server returned a different fsid for the referral */
2470 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2471 dprintk("%s: server did not return a different fsid for"
2472 " a referral at %s\n", __func__, name->name);
2476 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2477 nfs_fixup_referral_attributes(&locations->fattr);
2479 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2480 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2481 memset(fhandle, 0, sizeof(struct nfs_fh));
2489 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2491 struct nfs4_getattr_arg args = {
2493 .bitmask = server->attr_bitmask,
2495 struct nfs4_getattr_res res = {
2499 struct rpc_message msg = {
2500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2505 nfs_fattr_init(fattr);
2506 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2509 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2511 struct nfs4_exception exception = { };
2514 err = nfs4_handle_exception(server,
2515 _nfs4_proc_getattr(server, fhandle, fattr),
2517 } while (exception.retry);
2522 * The file is not closed if it is opened due to the a request to change
2523 * the size of the file. The open call will not be needed once the
2524 * VFS layer lookup-intents are implemented.
2526 * Close is called when the inode is destroyed.
2527 * If we haven't opened the file for O_WRONLY, we
2528 * need to in the size_change case to obtain a stateid.
2531 * Because OPEN is always done by name in nfsv4, it is
2532 * possible that we opened a different file by the same
2533 * name. We can recognize this race condition, but we
2534 * can't do anything about it besides returning an error.
2536 * This will be fixed with VFS changes (lookup-intent).
2539 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2540 struct iattr *sattr)
2542 struct inode *inode = dentry->d_inode;
2543 struct rpc_cred *cred = NULL;
2544 struct nfs4_state *state = NULL;
2547 if (pnfs_ld_layoutret_on_setattr(inode))
2548 pnfs_return_layout(inode);
2550 nfs_fattr_init(fattr);
2552 /* Deal with open(O_TRUNC) */
2553 if (sattr->ia_valid & ATTR_OPEN)
2554 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2556 /* Optimization: if the end result is no change, don't RPC */
2557 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2560 /* Search for an existing open(O_WRITE) file */
2561 if (sattr->ia_valid & ATTR_FILE) {
2562 struct nfs_open_context *ctx;
2564 ctx = nfs_file_open_context(sattr->ia_file);
2571 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2573 nfs_setattr_update_inode(inode, sattr);
2577 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2578 const struct qstr *name, struct nfs_fh *fhandle,
2579 struct nfs_fattr *fattr)
2581 struct nfs_server *server = NFS_SERVER(dir);
2583 struct nfs4_lookup_arg args = {
2584 .bitmask = server->attr_bitmask,
2585 .dir_fh = NFS_FH(dir),
2588 struct nfs4_lookup_res res = {
2593 struct rpc_message msg = {
2594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2599 nfs_fattr_init(fattr);
2601 dprintk("NFS call lookup %s\n", name->name);
2602 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2603 dprintk("NFS reply lookup: %d\n", status);
2607 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2609 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2610 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2611 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2615 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2616 struct qstr *name, struct nfs_fh *fhandle,
2617 struct nfs_fattr *fattr)
2619 struct nfs4_exception exception = { };
2620 struct rpc_clnt *client = *clnt;
2623 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2625 case -NFS4ERR_BADNAME:
2628 case -NFS4ERR_MOVED:
2629 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2631 case -NFS4ERR_WRONGSEC:
2633 if (client != *clnt)
2636 client = nfs4_create_sec_client(client, dir, name);
2638 return PTR_ERR(client);
2640 exception.retry = 1;
2643 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2645 } while (exception.retry);
2650 else if (client != *clnt)
2651 rpc_shutdown_client(client);
2656 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2657 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2660 struct rpc_clnt *client = NFS_CLIENT(dir);
2662 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2663 if (client != NFS_CLIENT(dir)) {
2664 rpc_shutdown_client(client);
2665 nfs_fixup_secinfo_attributes(fattr);
2671 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2672 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2675 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2677 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2679 rpc_shutdown_client(client);
2680 return ERR_PTR(status);
2685 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2687 struct nfs_server *server = NFS_SERVER(inode);
2688 struct nfs4_accessargs args = {
2689 .fh = NFS_FH(inode),
2690 .bitmask = server->cache_consistency_bitmask,
2692 struct nfs4_accessres res = {
2695 struct rpc_message msg = {
2696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2699 .rpc_cred = entry->cred,
2701 int mode = entry->mask;
2705 * Determine which access bits we want to ask for...
2707 if (mode & MAY_READ)
2708 args.access |= NFS4_ACCESS_READ;
2709 if (S_ISDIR(inode->i_mode)) {
2710 if (mode & MAY_WRITE)
2711 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2712 if (mode & MAY_EXEC)
2713 args.access |= NFS4_ACCESS_LOOKUP;
2715 if (mode & MAY_WRITE)
2716 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2717 if (mode & MAY_EXEC)
2718 args.access |= NFS4_ACCESS_EXECUTE;
2721 res.fattr = nfs_alloc_fattr();
2722 if (res.fattr == NULL)
2725 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2728 if (res.access & NFS4_ACCESS_READ)
2729 entry->mask |= MAY_READ;
2730 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2731 entry->mask |= MAY_WRITE;
2732 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2733 entry->mask |= MAY_EXEC;
2734 nfs_refresh_inode(inode, res.fattr);
2736 nfs_free_fattr(res.fattr);
2740 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2742 struct nfs4_exception exception = { };
2745 err = nfs4_handle_exception(NFS_SERVER(inode),
2746 _nfs4_proc_access(inode, entry),
2748 } while (exception.retry);
2753 * TODO: For the time being, we don't try to get any attributes
2754 * along with any of the zero-copy operations READ, READDIR,
2757 * In the case of the first three, we want to put the GETATTR
2758 * after the read-type operation -- this is because it is hard
2759 * to predict the length of a GETATTR response in v4, and thus
2760 * align the READ data correctly. This means that the GETATTR
2761 * may end up partially falling into the page cache, and we should
2762 * shift it into the 'tail' of the xdr_buf before processing.
2763 * To do this efficiently, we need to know the total length
2764 * of data received, which doesn't seem to be available outside
2767 * In the case of WRITE, we also want to put the GETATTR after
2768 * the operation -- in this case because we want to make sure
2769 * we get the post-operation mtime and size. This means that
2770 * we can't use xdr_encode_pages() as written: we need a variant
2771 * of it which would leave room in the 'tail' iovec.
2773 * Both of these changes to the XDR layer would in fact be quite
2774 * minor, but I decided to leave them for a subsequent patch.
2776 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2777 unsigned int pgbase, unsigned int pglen)
2779 struct nfs4_readlink args = {
2780 .fh = NFS_FH(inode),
2785 struct nfs4_readlink_res res;
2786 struct rpc_message msg = {
2787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2792 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2795 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2796 unsigned int pgbase, unsigned int pglen)
2798 struct nfs4_exception exception = { };
2801 err = nfs4_handle_exception(NFS_SERVER(inode),
2802 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2804 } while (exception.retry);
2810 * We will need to arrange for the VFS layer to provide an atomic open.
2811 * Until then, this create/open method is prone to inefficiency and race
2812 * conditions due to the lookup, create, and open VFS calls from sys_open()
2813 * placed on the wire.
2815 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2816 * The file will be opened again in the subsequent VFS open call
2817 * (nfs4_proc_file_open).
2819 * The open for read will just hang around to be used by any process that
2820 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2824 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2825 int flags, struct nfs_open_context *ctx)
2827 struct dentry *de = dentry;
2828 struct nfs4_state *state;
2829 struct rpc_cred *cred = NULL;
2838 sattr->ia_mode &= ~current_umask();
2839 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
2841 if (IS_ERR(state)) {
2842 status = PTR_ERR(state);
2845 d_add(dentry, igrab(state->inode));
2846 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2850 nfs4_close_sync(state, fmode);
2855 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2857 struct nfs_server *server = NFS_SERVER(dir);
2858 struct nfs_removeargs args = {
2862 struct nfs_removeres res = {
2865 struct rpc_message msg = {
2866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2872 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2874 update_changeattr(dir, &res.cinfo);
2878 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2880 struct nfs4_exception exception = { };
2883 err = nfs4_handle_exception(NFS_SERVER(dir),
2884 _nfs4_proc_remove(dir, name),
2886 } while (exception.retry);
2890 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2892 struct nfs_server *server = NFS_SERVER(dir);
2893 struct nfs_removeargs *args = msg->rpc_argp;
2894 struct nfs_removeres *res = msg->rpc_resp;
2896 res->server = server;
2897 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2898 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2901 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2903 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2904 &data->args.seq_args,
2908 rpc_call_start(task);
2911 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2913 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2915 if (!nfs4_sequence_done(task, &res->seq_res))
2917 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2919 update_changeattr(dir, &res->cinfo);
2923 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2925 struct nfs_server *server = NFS_SERVER(dir);
2926 struct nfs_renameargs *arg = msg->rpc_argp;
2927 struct nfs_renameres *res = msg->rpc_resp;
2929 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2930 res->server = server;
2931 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2934 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2936 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2937 &data->args.seq_args,
2941 rpc_call_start(task);
2944 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2945 struct inode *new_dir)
2947 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2949 if (!nfs4_sequence_done(task, &res->seq_res))
2951 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2954 update_changeattr(old_dir, &res->old_cinfo);
2955 update_changeattr(new_dir, &res->new_cinfo);
2959 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2960 struct inode *new_dir, struct qstr *new_name)
2962 struct nfs_server *server = NFS_SERVER(old_dir);
2963 struct nfs_renameargs arg = {
2964 .old_dir = NFS_FH(old_dir),
2965 .new_dir = NFS_FH(new_dir),
2966 .old_name = old_name,
2967 .new_name = new_name,
2969 struct nfs_renameres res = {
2972 struct rpc_message msg = {
2973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2977 int status = -ENOMEM;
2979 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2981 update_changeattr(old_dir, &res.old_cinfo);
2982 update_changeattr(new_dir, &res.new_cinfo);
2987 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2988 struct inode *new_dir, struct qstr *new_name)
2990 struct nfs4_exception exception = { };
2993 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2994 _nfs4_proc_rename(old_dir, old_name,
2997 } while (exception.retry);
3001 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3003 struct nfs_server *server = NFS_SERVER(inode);
3004 struct nfs4_link_arg arg = {
3005 .fh = NFS_FH(inode),
3006 .dir_fh = NFS_FH(dir),
3008 .bitmask = server->attr_bitmask,
3010 struct nfs4_link_res res = {
3013 struct rpc_message msg = {
3014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3018 int status = -ENOMEM;
3020 res.fattr = nfs_alloc_fattr();
3021 if (res.fattr == NULL)
3024 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3026 update_changeattr(dir, &res.cinfo);
3027 nfs_post_op_update_inode(inode, res.fattr);
3030 nfs_free_fattr(res.fattr);
3034 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3036 struct nfs4_exception exception = { };
3039 err = nfs4_handle_exception(NFS_SERVER(inode),
3040 _nfs4_proc_link(inode, dir, name),
3042 } while (exception.retry);
3046 struct nfs4_createdata {
3047 struct rpc_message msg;
3048 struct nfs4_create_arg arg;
3049 struct nfs4_create_res res;
3051 struct nfs_fattr fattr;
3054 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3055 struct qstr *name, struct iattr *sattr, u32 ftype)
3057 struct nfs4_createdata *data;
3059 data = kzalloc(sizeof(*data), GFP_KERNEL);
3061 struct nfs_server *server = NFS_SERVER(dir);
3063 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3064 data->msg.rpc_argp = &data->arg;
3065 data->msg.rpc_resp = &data->res;
3066 data->arg.dir_fh = NFS_FH(dir);
3067 data->arg.server = server;
3068 data->arg.name = name;
3069 data->arg.attrs = sattr;
3070 data->arg.ftype = ftype;
3071 data->arg.bitmask = server->attr_bitmask;
3072 data->res.server = server;
3073 data->res.fh = &data->fh;
3074 data->res.fattr = &data->fattr;
3075 nfs_fattr_init(data->res.fattr);
3080 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3082 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3083 &data->arg.seq_args, &data->res.seq_res, 1);
3085 update_changeattr(dir, &data->res.dir_cinfo);
3086 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3091 static void nfs4_free_createdata(struct nfs4_createdata *data)
3096 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3097 struct page *page, unsigned int len, struct iattr *sattr)
3099 struct nfs4_createdata *data;
3100 int status = -ENAMETOOLONG;
3102 if (len > NFS4_MAXPATHLEN)
3106 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3110 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3111 data->arg.u.symlink.pages = &page;
3112 data->arg.u.symlink.len = len;
3114 status = nfs4_do_create(dir, dentry, data);
3116 nfs4_free_createdata(data);
3121 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3122 struct page *page, unsigned int len, struct iattr *sattr)
3124 struct nfs4_exception exception = { };
3127 err = nfs4_handle_exception(NFS_SERVER(dir),
3128 _nfs4_proc_symlink(dir, dentry, page,
3131 } while (exception.retry);
3135 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3136 struct iattr *sattr)
3138 struct nfs4_createdata *data;
3139 int status = -ENOMEM;
3141 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3145 status = nfs4_do_create(dir, dentry, data);
3147 nfs4_free_createdata(data);
3152 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3153 struct iattr *sattr)
3155 struct nfs4_exception exception = { };
3158 sattr->ia_mode &= ~current_umask();
3160 err = nfs4_handle_exception(NFS_SERVER(dir),
3161 _nfs4_proc_mkdir(dir, dentry, sattr),
3163 } while (exception.retry);
3167 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3168 u64 cookie, struct page **pages, unsigned int count, int plus)
3170 struct inode *dir = dentry->d_inode;
3171 struct nfs4_readdir_arg args = {
3176 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3179 struct nfs4_readdir_res res;
3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3188 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3189 dentry->d_parent->d_name.name,
3190 dentry->d_name.name,
3191 (unsigned long long)cookie);
3192 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3193 res.pgbase = args.pgbase;
3194 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3196 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3197 status += args.pgbase;
3200 nfs_invalidate_atime(dir);
3202 dprintk("%s: returns %d\n", __func__, status);
3206 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3207 u64 cookie, struct page **pages, unsigned int count, int plus)
3209 struct nfs4_exception exception = { };
3212 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3213 _nfs4_proc_readdir(dentry, cred, cookie,
3214 pages, count, plus),
3216 } while (exception.retry);
3220 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3221 struct iattr *sattr, dev_t rdev)
3223 struct nfs4_createdata *data;
3224 int mode = sattr->ia_mode;
3225 int status = -ENOMEM;
3227 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3228 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3230 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3235 data->arg.ftype = NF4FIFO;
3236 else if (S_ISBLK(mode)) {
3237 data->arg.ftype = NF4BLK;
3238 data->arg.u.device.specdata1 = MAJOR(rdev);
3239 data->arg.u.device.specdata2 = MINOR(rdev);
3241 else if (S_ISCHR(mode)) {
3242 data->arg.ftype = NF4CHR;
3243 data->arg.u.device.specdata1 = MAJOR(rdev);
3244 data->arg.u.device.specdata2 = MINOR(rdev);
3247 status = nfs4_do_create(dir, dentry, data);
3249 nfs4_free_createdata(data);
3254 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3255 struct iattr *sattr, dev_t rdev)
3257 struct nfs4_exception exception = { };
3260 sattr->ia_mode &= ~current_umask();
3262 err = nfs4_handle_exception(NFS_SERVER(dir),
3263 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3265 } while (exception.retry);
3269 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3270 struct nfs_fsstat *fsstat)
3272 struct nfs4_statfs_arg args = {
3274 .bitmask = server->attr_bitmask,
3276 struct nfs4_statfs_res res = {
3279 struct rpc_message msg = {
3280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3285 nfs_fattr_init(fsstat->fattr);
3286 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3289 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3291 struct nfs4_exception exception = { };
3294 err = nfs4_handle_exception(server,
3295 _nfs4_proc_statfs(server, fhandle, fsstat),
3297 } while (exception.retry);
3301 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3302 struct nfs_fsinfo *fsinfo)
3304 struct nfs4_fsinfo_arg args = {
3306 .bitmask = server->attr_bitmask,
3308 struct nfs4_fsinfo_res res = {
3311 struct rpc_message msg = {
3312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3317 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3320 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3322 struct nfs4_exception exception = { };
3326 err = nfs4_handle_exception(server,
3327 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3329 } while (exception.retry);
3333 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3335 nfs_fattr_init(fsinfo->fattr);
3336 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3339 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3340 struct nfs_pathconf *pathconf)
3342 struct nfs4_pathconf_arg args = {
3344 .bitmask = server->attr_bitmask,
3346 struct nfs4_pathconf_res res = {
3347 .pathconf = pathconf,
3349 struct rpc_message msg = {
3350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3355 /* None of the pathconf attributes are mandatory to implement */
3356 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3357 memset(pathconf, 0, sizeof(*pathconf));
3361 nfs_fattr_init(pathconf->fattr);
3362 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3365 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3366 struct nfs_pathconf *pathconf)
3368 struct nfs4_exception exception = { };
3372 err = nfs4_handle_exception(server,
3373 _nfs4_proc_pathconf(server, fhandle, pathconf),
3375 } while (exception.retry);
3379 void __nfs4_read_done_cb(struct nfs_read_data *data)
3381 nfs_invalidate_atime(data->header->inode);
3384 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3386 struct nfs_server *server = NFS_SERVER(data->header->inode);
3388 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3389 rpc_restart_call_prepare(task);
3393 __nfs4_read_done_cb(data);
3394 if (task->tk_status > 0)
3395 renew_lease(server, data->timestamp);
3399 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3402 dprintk("--> %s\n", __func__);
3404 if (!nfs4_sequence_done(task, &data->res.seq_res))
3407 return data->read_done_cb ? data->read_done_cb(task, data) :
3408 nfs4_read_done_cb(task, data);
3411 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3413 data->timestamp = jiffies;
3414 data->read_done_cb = nfs4_read_done_cb;
3415 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3416 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3419 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3421 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3422 &data->args.seq_args,
3426 rpc_call_start(task);
3429 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3431 struct inode *inode = data->header->inode;
3433 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3434 rpc_restart_call_prepare(task);
3437 if (task->tk_status >= 0) {
3438 renew_lease(NFS_SERVER(inode), data->timestamp);
3439 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3444 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3446 if (!nfs4_sequence_done(task, &data->res.seq_res))
3448 return data->write_done_cb ? data->write_done_cb(task, data) :
3449 nfs4_write_done_cb(task, data);
3453 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3455 const struct nfs_pgio_header *hdr = data->header;
3457 /* Don't request attributes for pNFS or O_DIRECT writes */
3458 if (data->ds_clp != NULL || hdr->dreq != NULL)
3460 /* Otherwise, request attributes if and only if we don't hold
3463 return nfs_have_delegation(hdr->inode, FMODE_READ) == 0;
3466 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3468 struct nfs_server *server = NFS_SERVER(data->header->inode);
3470 if (!nfs4_write_need_cache_consistency_data(data)) {
3471 data->args.bitmask = NULL;
3472 data->res.fattr = NULL;
3474 data->args.bitmask = server->cache_consistency_bitmask;
3476 if (!data->write_done_cb)
3477 data->write_done_cb = nfs4_write_done_cb;
3478 data->res.server = server;
3479 data->timestamp = jiffies;
3481 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3482 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3485 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3487 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3488 &data->args.seq_args,
3492 rpc_call_start(task);
3495 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3497 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3498 &data->args.seq_args,
3502 rpc_call_start(task);
3505 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3507 struct inode *inode = data->inode;
3509 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3510 rpc_restart_call_prepare(task);
3516 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3518 if (!nfs4_sequence_done(task, &data->res.seq_res))
3520 return data->commit_done_cb(task, data);
3523 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3525 struct nfs_server *server = NFS_SERVER(data->inode);
3527 if (data->commit_done_cb == NULL)
3528 data->commit_done_cb = nfs4_commit_done_cb;
3529 data->res.server = server;
3530 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3531 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3534 struct nfs4_renewdata {
3535 struct nfs_client *client;
3536 unsigned long timestamp;
3540 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3541 * standalone procedure for queueing an asynchronous RENEW.
3543 static void nfs4_renew_release(void *calldata)
3545 struct nfs4_renewdata *data = calldata;
3546 struct nfs_client *clp = data->client;
3548 if (atomic_read(&clp->cl_count) > 1)
3549 nfs4_schedule_state_renewal(clp);
3550 nfs_put_client(clp);
3554 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3556 struct nfs4_renewdata *data = calldata;
3557 struct nfs_client *clp = data->client;
3558 unsigned long timestamp = data->timestamp;
3560 if (task->tk_status < 0) {
3561 /* Unless we're shutting down, schedule state recovery! */
3562 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3564 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3565 nfs4_schedule_lease_recovery(clp);
3568 nfs4_schedule_path_down_recovery(clp);
3570 do_renew_lease(clp, timestamp);
3573 static const struct rpc_call_ops nfs4_renew_ops = {
3574 .rpc_call_done = nfs4_renew_done,
3575 .rpc_release = nfs4_renew_release,
3578 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3580 struct rpc_message msg = {
3581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3585 struct nfs4_renewdata *data;
3587 if (renew_flags == 0)
3589 if (!atomic_inc_not_zero(&clp->cl_count))
3591 data = kmalloc(sizeof(*data), GFP_NOFS);
3595 data->timestamp = jiffies;
3596 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3597 &nfs4_renew_ops, data);
3600 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3602 struct rpc_message msg = {
3603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3607 unsigned long now = jiffies;
3610 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3613 do_renew_lease(clp, now);
3617 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3619 return (server->caps & NFS_CAP_ACLS)
3620 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3621 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3624 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3625 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3628 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3630 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3631 struct page **pages, unsigned int *pgbase)
3633 struct page *newpage, **spages;
3639 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3640 newpage = alloc_page(GFP_KERNEL);
3642 if (newpage == NULL)
3644 memcpy(page_address(newpage), buf, len);
3649 } while (buflen != 0);
3655 __free_page(spages[rc-1]);
3659 struct nfs4_cached_acl {
3665 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3667 struct nfs_inode *nfsi = NFS_I(inode);
3669 spin_lock(&inode->i_lock);
3670 kfree(nfsi->nfs4_acl);
3671 nfsi->nfs4_acl = acl;
3672 spin_unlock(&inode->i_lock);
3675 static void nfs4_zap_acl_attr(struct inode *inode)
3677 nfs4_set_cached_acl(inode, NULL);
3680 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3682 struct nfs_inode *nfsi = NFS_I(inode);
3683 struct nfs4_cached_acl *acl;
3686 spin_lock(&inode->i_lock);
3687 acl = nfsi->nfs4_acl;
3690 if (buf == NULL) /* user is just asking for length */
3692 if (acl->cached == 0)
3694 ret = -ERANGE; /* see getxattr(2) man page */
3695 if (acl->len > buflen)
3697 memcpy(buf, acl->data, acl->len);
3701 spin_unlock(&inode->i_lock);
3705 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3707 struct nfs4_cached_acl *acl;
3709 if (pages && acl_len <= PAGE_SIZE) {
3710 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3714 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3716 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3723 nfs4_set_cached_acl(inode, acl);
3727 * The getxattr API returns the required buffer length when called with a
3728 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3729 * the required buf. On a NULL buf, we send a page of data to the server
3730 * guessing that the ACL request can be serviced by a page. If so, we cache
3731 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3732 * the cache. If not so, we throw away the page, and cache the required
3733 * length. The next getxattr call will then produce another round trip to
3734 * the server, this time with the input buf of the required size.
3736 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3738 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3739 struct nfs_getaclargs args = {
3740 .fh = NFS_FH(inode),
3744 struct nfs_getaclres res = {
3747 struct rpc_message msg = {
3748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3752 int ret = -ENOMEM, npages, i, acl_len = 0;
3754 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3755 /* As long as we're doing a round trip to the server anyway,
3756 * let's be prepared for a page of acl data. */
3760 /* Add an extra page to handle the bitmap returned */
3763 for (i = 0; i < npages; i++) {
3764 pages[i] = alloc_page(GFP_KERNEL);
3769 /* for decoding across pages */
3770 res.acl_scratch = alloc_page(GFP_KERNEL);
3771 if (!res.acl_scratch)
3774 args.acl_len = npages * PAGE_SIZE;
3775 args.acl_pgbase = 0;
3777 /* Let decode_getfacl know not to fail if the ACL data is larger than
3778 * the page we send as a guess */
3780 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3782 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3783 __func__, buf, buflen, npages, args.acl_len);
3784 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3785 &msg, &args.seq_args, &res.seq_res, 0);
3789 acl_len = res.acl_len - res.acl_data_offset;
3790 if (acl_len > args.acl_len)
3791 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3793 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3797 if (acl_len > buflen)
3799 _copy_from_pages(buf, pages, res.acl_data_offset,
3804 for (i = 0; i < npages; i++)
3806 __free_page(pages[i]);
3807 if (res.acl_scratch)
3808 __free_page(res.acl_scratch);
3812 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3814 struct nfs4_exception exception = { };
3817 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3820 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3821 } while (exception.retry);
3825 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3827 struct nfs_server *server = NFS_SERVER(inode);
3830 if (!nfs4_server_supports_acls(server))
3832 ret = nfs_revalidate_inode(server, inode);
3835 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3836 nfs_zap_acl_cache(inode);
3837 ret = nfs4_read_cached_acl(inode, buf, buflen);
3839 /* -ENOENT is returned if there is no ACL or if there is an ACL
3840 * but no cached acl data, just the acl length */
3842 return nfs4_get_acl_uncached(inode, buf, buflen);
3845 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3847 struct nfs_server *server = NFS_SERVER(inode);
3848 struct page *pages[NFS4ACL_MAXPAGES];
3849 struct nfs_setaclargs arg = {
3850 .fh = NFS_FH(inode),
3854 struct nfs_setaclres res;
3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3862 if (!nfs4_server_supports_acls(server))
3864 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3867 nfs_inode_return_delegation(inode);
3868 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3871 * Free each page after tx, so the only ref left is
3872 * held by the network stack
3875 put_page(pages[i-1]);
3878 * Acl update can result in inode attribute update.
3879 * so mark the attribute cache invalid.
3881 spin_lock(&inode->i_lock);
3882 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3883 spin_unlock(&inode->i_lock);
3884 nfs_access_zap_cache(inode);
3885 nfs_zap_acl_cache(inode);
3889 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3891 struct nfs4_exception exception = { };
3894 err = nfs4_handle_exception(NFS_SERVER(inode),
3895 __nfs4_proc_set_acl(inode, buf, buflen),
3897 } while (exception.retry);
3902 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3904 struct nfs_client *clp = server->nfs_client;
3906 if (task->tk_status >= 0)
3908 switch(task->tk_status) {
3909 case -NFS4ERR_DELEG_REVOKED:
3910 case -NFS4ERR_ADMIN_REVOKED:
3911 case -NFS4ERR_BAD_STATEID:
3914 nfs_remove_bad_delegation(state->inode);
3915 case -NFS4ERR_OPENMODE:
3918 nfs4_schedule_stateid_recovery(server, state);
3919 goto wait_on_recovery;
3920 case -NFS4ERR_EXPIRED:
3922 nfs4_schedule_stateid_recovery(server, state);
3923 case -NFS4ERR_STALE_STATEID:
3924 case -NFS4ERR_STALE_CLIENTID:
3925 nfs4_schedule_lease_recovery(clp);
3926 goto wait_on_recovery;
3927 #if defined(CONFIG_NFS_V4_1)
3928 case -NFS4ERR_BADSESSION:
3929 case -NFS4ERR_BADSLOT:
3930 case -NFS4ERR_BAD_HIGH_SLOT:
3931 case -NFS4ERR_DEADSESSION:
3932 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3933 case -NFS4ERR_SEQ_FALSE_RETRY:
3934 case -NFS4ERR_SEQ_MISORDERED:
3935 dprintk("%s ERROR %d, Reset session\n", __func__,
3937 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3938 task->tk_status = 0;
3940 #endif /* CONFIG_NFS_V4_1 */
3941 case -NFS4ERR_DELAY:
3942 nfs_inc_server_stats(server, NFSIOS_DELAY);
3943 case -NFS4ERR_GRACE:
3945 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3946 task->tk_status = 0;
3948 case -NFS4ERR_RETRY_UNCACHED_REP:
3949 case -NFS4ERR_OLD_STATEID:
3950 task->tk_status = 0;
3953 task->tk_status = nfs4_map_errors(task->tk_status);
3956 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3957 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3958 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3959 task->tk_status = 0;
3963 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3964 nfs4_verifier *bootverf)
3968 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3969 /* An impossible timestamp guarantees this value
3970 * will never match a generated boot time. */
3972 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3974 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3975 verf[0] = (__be32)nn->boot_time.tv_sec;
3976 verf[1] = (__be32)nn->boot_time.tv_nsec;
3978 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3981 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3982 unsigned short port, struct rpc_cred *cred,
3983 struct nfs4_setclientid_res *res)
3985 nfs4_verifier sc_verifier;
3986 struct nfs4_setclientid setclientid = {
3987 .sc_verifier = &sc_verifier,
3989 .sc_cb_ident = clp->cl_cb_ident,
3991 struct rpc_message msg = {
3992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3993 .rpc_argp = &setclientid,
4000 nfs4_init_boot_verifier(clp, &sc_verifier);
4004 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4005 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
4007 rpc_peeraddr2str(clp->cl_rpcclient,
4009 rpc_peeraddr2str(clp->cl_rpcclient,
4011 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4012 clp->cl_id_uniquifier);
4013 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4014 sizeof(setclientid.sc_netid),
4015 rpc_peeraddr2str(clp->cl_rpcclient,
4016 RPC_DISPLAY_NETID));
4017 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4018 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4019 clp->cl_ipaddr, port >> 8, port & 255);
4022 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4023 if (status != -NFS4ERR_CLID_INUSE)
4026 ++clp->cl_id_uniquifier;
4030 ssleep(clp->cl_lease_time / HZ + 1);
4035 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4036 struct nfs4_setclientid_res *arg,
4037 struct rpc_cred *cred)
4039 struct nfs_fsinfo fsinfo;
4040 struct rpc_message msg = {
4041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4043 .rpc_resp = &fsinfo,
4050 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4052 spin_lock(&clp->cl_lock);
4053 clp->cl_lease_time = fsinfo.lease_time * HZ;
4054 clp->cl_last_renewal = now;
4055 spin_unlock(&clp->cl_lock);
4060 struct nfs4_delegreturndata {
4061 struct nfs4_delegreturnargs args;
4062 struct nfs4_delegreturnres res;
4064 nfs4_stateid stateid;
4065 unsigned long timestamp;
4066 struct nfs_fattr fattr;
4070 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4072 struct nfs4_delegreturndata *data = calldata;
4074 if (!nfs4_sequence_done(task, &data->res.seq_res))
4077 switch (task->tk_status) {
4078 case -NFS4ERR_STALE_STATEID:
4079 case -NFS4ERR_EXPIRED:
4081 renew_lease(data->res.server, data->timestamp);
4084 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4086 rpc_restart_call_prepare(task);
4090 data->rpc_status = task->tk_status;
4093 static void nfs4_delegreturn_release(void *calldata)
4098 #if defined(CONFIG_NFS_V4_1)
4099 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4101 struct nfs4_delegreturndata *d_data;
4103 d_data = (struct nfs4_delegreturndata *)data;
4105 if (nfs4_setup_sequence(d_data->res.server,
4106 &d_data->args.seq_args,
4107 &d_data->res.seq_res, task))
4109 rpc_call_start(task);
4111 #endif /* CONFIG_NFS_V4_1 */
4113 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4114 #if defined(CONFIG_NFS_V4_1)
4115 .rpc_call_prepare = nfs4_delegreturn_prepare,
4116 #endif /* CONFIG_NFS_V4_1 */
4117 .rpc_call_done = nfs4_delegreturn_done,
4118 .rpc_release = nfs4_delegreturn_release,
4121 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4123 struct nfs4_delegreturndata *data;
4124 struct nfs_server *server = NFS_SERVER(inode);
4125 struct rpc_task *task;
4126 struct rpc_message msg = {
4127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4130 struct rpc_task_setup task_setup_data = {
4131 .rpc_client = server->client,
4132 .rpc_message = &msg,
4133 .callback_ops = &nfs4_delegreturn_ops,
4134 .flags = RPC_TASK_ASYNC,
4138 data = kzalloc(sizeof(*data), GFP_NOFS);
4141 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4142 data->args.fhandle = &data->fh;
4143 data->args.stateid = &data->stateid;
4144 data->args.bitmask = server->cache_consistency_bitmask;
4145 nfs_copy_fh(&data->fh, NFS_FH(inode));
4146 nfs4_stateid_copy(&data->stateid, stateid);
4147 data->res.fattr = &data->fattr;
4148 data->res.server = server;
4149 nfs_fattr_init(data->res.fattr);
4150 data->timestamp = jiffies;
4151 data->rpc_status = 0;
4153 task_setup_data.callback_data = data;
4154 msg.rpc_argp = &data->args;
4155 msg.rpc_resp = &data->res;
4156 task = rpc_run_task(&task_setup_data);
4158 return PTR_ERR(task);
4161 status = nfs4_wait_for_completion_rpc_task(task);
4164 status = data->rpc_status;
4166 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4168 nfs_refresh_inode(inode, &data->fattr);
4174 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4176 struct nfs_server *server = NFS_SERVER(inode);
4177 struct nfs4_exception exception = { };
4180 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4182 case -NFS4ERR_STALE_STATEID:
4183 case -NFS4ERR_EXPIRED:
4187 err = nfs4_handle_exception(server, err, &exception);
4188 } while (exception.retry);
4192 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4193 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4196 * sleep, with exponential backoff, and retry the LOCK operation.
4198 static unsigned long
4199 nfs4_set_lock_task_retry(unsigned long timeout)
4201 freezable_schedule_timeout_killable(timeout);
4203 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4204 return NFS4_LOCK_MAXTIMEOUT;
4208 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4210 struct inode *inode = state->inode;
4211 struct nfs_server *server = NFS_SERVER(inode);
4212 struct nfs_client *clp = server->nfs_client;
4213 struct nfs_lockt_args arg = {
4214 .fh = NFS_FH(inode),
4217 struct nfs_lockt_res res = {
4220 struct rpc_message msg = {
4221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4224 .rpc_cred = state->owner->so_cred,
4226 struct nfs4_lock_state *lsp;
4229 arg.lock_owner.clientid = clp->cl_clientid;
4230 status = nfs4_set_lock_state(state, request);
4233 lsp = request->fl_u.nfs4_fl.owner;
4234 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4235 arg.lock_owner.s_dev = server->s_dev;
4236 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4239 request->fl_type = F_UNLCK;
4241 case -NFS4ERR_DENIED:
4244 request->fl_ops->fl_release_private(request);
4249 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4251 struct nfs4_exception exception = { };
4255 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4256 _nfs4_proc_getlk(state, cmd, request),
4258 } while (exception.retry);
4262 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4265 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4267 res = posix_lock_file_wait(file, fl);
4270 res = flock_lock_file_wait(file, fl);
4278 struct nfs4_unlockdata {
4279 struct nfs_locku_args arg;
4280 struct nfs_locku_res res;
4281 struct nfs4_lock_state *lsp;
4282 struct nfs_open_context *ctx;
4283 struct file_lock fl;
4284 const struct nfs_server *server;
4285 unsigned long timestamp;
4288 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4289 struct nfs_open_context *ctx,
4290 struct nfs4_lock_state *lsp,
4291 struct nfs_seqid *seqid)
4293 struct nfs4_unlockdata *p;
4294 struct inode *inode = lsp->ls_state->inode;
4296 p = kzalloc(sizeof(*p), GFP_NOFS);
4299 p->arg.fh = NFS_FH(inode);
4301 p->arg.seqid = seqid;
4302 p->res.seqid = seqid;
4303 p->arg.stateid = &lsp->ls_stateid;
4305 atomic_inc(&lsp->ls_count);
4306 /* Ensure we don't close file until we're done freeing locks! */
4307 p->ctx = get_nfs_open_context(ctx);
4308 memcpy(&p->fl, fl, sizeof(p->fl));
4309 p->server = NFS_SERVER(inode);
4313 static void nfs4_locku_release_calldata(void *data)
4315 struct nfs4_unlockdata *calldata = data;
4316 nfs_free_seqid(calldata->arg.seqid);
4317 nfs4_put_lock_state(calldata->lsp);
4318 put_nfs_open_context(calldata->ctx);
4322 static void nfs4_locku_done(struct rpc_task *task, void *data)
4324 struct nfs4_unlockdata *calldata = data;
4326 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4328 switch (task->tk_status) {
4330 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4331 &calldata->res.stateid);
4332 renew_lease(calldata->server, calldata->timestamp);
4334 case -NFS4ERR_BAD_STATEID:
4335 case -NFS4ERR_OLD_STATEID:
4336 case -NFS4ERR_STALE_STATEID:
4337 case -NFS4ERR_EXPIRED:
4340 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4341 rpc_restart_call_prepare(task);
4345 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4347 struct nfs4_unlockdata *calldata = data;
4349 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4351 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4352 /* Note: exit _without_ running nfs4_locku_done */
4353 task->tk_action = NULL;
4356 calldata->timestamp = jiffies;
4357 if (nfs4_setup_sequence(calldata->server,
4358 &calldata->arg.seq_args,
4359 &calldata->res.seq_res, task))
4361 rpc_call_start(task);
4364 static const struct rpc_call_ops nfs4_locku_ops = {
4365 .rpc_call_prepare = nfs4_locku_prepare,
4366 .rpc_call_done = nfs4_locku_done,
4367 .rpc_release = nfs4_locku_release_calldata,
4370 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4371 struct nfs_open_context *ctx,
4372 struct nfs4_lock_state *lsp,
4373 struct nfs_seqid *seqid)
4375 struct nfs4_unlockdata *data;
4376 struct rpc_message msg = {
4377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4378 .rpc_cred = ctx->cred,
4380 struct rpc_task_setup task_setup_data = {
4381 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4382 .rpc_message = &msg,
4383 .callback_ops = &nfs4_locku_ops,
4384 .workqueue = nfsiod_workqueue,
4385 .flags = RPC_TASK_ASYNC,
4388 /* Ensure this is an unlock - when canceling a lock, the
4389 * canceled lock is passed in, and it won't be an unlock.
4391 fl->fl_type = F_UNLCK;
4393 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4395 nfs_free_seqid(seqid);
4396 return ERR_PTR(-ENOMEM);
4399 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4400 msg.rpc_argp = &data->arg;
4401 msg.rpc_resp = &data->res;
4402 task_setup_data.callback_data = data;
4403 return rpc_run_task(&task_setup_data);
4406 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4408 struct nfs_inode *nfsi = NFS_I(state->inode);
4409 struct nfs_seqid *seqid;
4410 struct nfs4_lock_state *lsp;
4411 struct rpc_task *task;
4413 unsigned char fl_flags = request->fl_flags;
4415 status = nfs4_set_lock_state(state, request);
4416 /* Unlock _before_ we do the RPC call */
4417 request->fl_flags |= FL_EXISTS;
4418 down_read(&nfsi->rwsem);
4419 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4420 up_read(&nfsi->rwsem);
4423 up_read(&nfsi->rwsem);
4426 /* Is this a delegated lock? */
4427 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4429 lsp = request->fl_u.nfs4_fl.owner;
4430 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4434 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4435 status = PTR_ERR(task);
4438 status = nfs4_wait_for_completion_rpc_task(task);
4441 request->fl_flags = fl_flags;
4445 struct nfs4_lockdata {
4446 struct nfs_lock_args arg;
4447 struct nfs_lock_res res;
4448 struct nfs4_lock_state *lsp;
4449 struct nfs_open_context *ctx;
4450 struct file_lock fl;
4451 unsigned long timestamp;
4454 struct nfs_server *server;
4457 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4458 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4461 struct nfs4_lockdata *p;
4462 struct inode *inode = lsp->ls_state->inode;
4463 struct nfs_server *server = NFS_SERVER(inode);
4465 p = kzalloc(sizeof(*p), gfp_mask);
4469 p->arg.fh = NFS_FH(inode);
4471 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4472 if (p->arg.open_seqid == NULL)
4474 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4475 if (p->arg.lock_seqid == NULL)
4476 goto out_free_seqid;
4477 p->arg.lock_stateid = &lsp->ls_stateid;
4478 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4479 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4480 p->arg.lock_owner.s_dev = server->s_dev;
4481 p->res.lock_seqid = p->arg.lock_seqid;
4484 atomic_inc(&lsp->ls_count);
4485 p->ctx = get_nfs_open_context(ctx);
4486 memcpy(&p->fl, fl, sizeof(p->fl));
4489 nfs_free_seqid(p->arg.open_seqid);
4495 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4497 struct nfs4_lockdata *data = calldata;
4498 struct nfs4_state *state = data->lsp->ls_state;
4500 dprintk("%s: begin!\n", __func__);
4501 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4503 /* Do we need to do an open_to_lock_owner? */
4504 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4505 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4507 data->arg.open_stateid = &state->stateid;
4508 data->arg.new_lock_owner = 1;
4509 data->res.open_seqid = data->arg.open_seqid;
4511 data->arg.new_lock_owner = 0;
4512 data->timestamp = jiffies;
4513 if (nfs4_setup_sequence(data->server,
4514 &data->arg.seq_args,
4515 &data->res.seq_res, task))
4517 rpc_call_start(task);
4518 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4521 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4523 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4524 nfs4_lock_prepare(task, calldata);
4527 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4529 struct nfs4_lockdata *data = calldata;
4531 dprintk("%s: begin!\n", __func__);
4533 if (!nfs4_sequence_done(task, &data->res.seq_res))
4536 data->rpc_status = task->tk_status;
4537 if (data->arg.new_lock_owner != 0) {
4538 if (data->rpc_status == 0)
4539 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4543 if (data->rpc_status == 0) {
4544 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4545 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4546 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4549 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4552 static void nfs4_lock_release(void *calldata)
4554 struct nfs4_lockdata *data = calldata;
4556 dprintk("%s: begin!\n", __func__);
4557 nfs_free_seqid(data->arg.open_seqid);
4558 if (data->cancelled != 0) {
4559 struct rpc_task *task;
4560 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4561 data->arg.lock_seqid);
4563 rpc_put_task_async(task);
4564 dprintk("%s: cancelling lock!\n", __func__);
4566 nfs_free_seqid(data->arg.lock_seqid);
4567 nfs4_put_lock_state(data->lsp);
4568 put_nfs_open_context(data->ctx);
4570 dprintk("%s: done!\n", __func__);
4573 static const struct rpc_call_ops nfs4_lock_ops = {
4574 .rpc_call_prepare = nfs4_lock_prepare,
4575 .rpc_call_done = nfs4_lock_done,
4576 .rpc_release = nfs4_lock_release,
4579 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4580 .rpc_call_prepare = nfs4_recover_lock_prepare,
4581 .rpc_call_done = nfs4_lock_done,
4582 .rpc_release = nfs4_lock_release,
4585 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4588 case -NFS4ERR_ADMIN_REVOKED:
4589 case -NFS4ERR_BAD_STATEID:
4590 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4591 if (new_lock_owner != 0 ||
4592 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4593 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4595 case -NFS4ERR_STALE_STATEID:
4596 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4597 case -NFS4ERR_EXPIRED:
4598 nfs4_schedule_lease_recovery(server->nfs_client);
4602 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4604 struct nfs4_lockdata *data;
4605 struct rpc_task *task;
4606 struct rpc_message msg = {
4607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4608 .rpc_cred = state->owner->so_cred,
4610 struct rpc_task_setup task_setup_data = {
4611 .rpc_client = NFS_CLIENT(state->inode),
4612 .rpc_message = &msg,
4613 .callback_ops = &nfs4_lock_ops,
4614 .workqueue = nfsiod_workqueue,
4615 .flags = RPC_TASK_ASYNC,
4619 dprintk("%s: begin!\n", __func__);
4620 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4621 fl->fl_u.nfs4_fl.owner,
4622 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4626 data->arg.block = 1;
4627 if (recovery_type > NFS_LOCK_NEW) {
4628 if (recovery_type == NFS_LOCK_RECLAIM)
4629 data->arg.reclaim = NFS_LOCK_RECLAIM;
4630 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4632 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4633 msg.rpc_argp = &data->arg;
4634 msg.rpc_resp = &data->res;
4635 task_setup_data.callback_data = data;
4636 task = rpc_run_task(&task_setup_data);
4638 return PTR_ERR(task);
4639 ret = nfs4_wait_for_completion_rpc_task(task);
4641 ret = data->rpc_status;
4643 nfs4_handle_setlk_error(data->server, data->lsp,
4644 data->arg.new_lock_owner, ret);
4646 data->cancelled = 1;
4648 dprintk("%s: done, ret = %d!\n", __func__, ret);
4652 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4654 struct nfs_server *server = NFS_SERVER(state->inode);
4655 struct nfs4_exception exception = {
4656 .inode = state->inode,
4661 /* Cache the lock if possible... */
4662 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4664 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4665 if (err != -NFS4ERR_DELAY)
4667 nfs4_handle_exception(server, err, &exception);
4668 } while (exception.retry);
4672 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4674 struct nfs_server *server = NFS_SERVER(state->inode);
4675 struct nfs4_exception exception = {
4676 .inode = state->inode,
4680 err = nfs4_set_lock_state(state, request);
4684 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4686 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4690 case -NFS4ERR_GRACE:
4691 case -NFS4ERR_DELAY:
4692 nfs4_handle_exception(server, err, &exception);
4695 } while (exception.retry);
4700 #if defined(CONFIG_NFS_V4_1)
4701 static int nfs41_check_expired_locks(struct nfs4_state *state)
4703 int status, ret = NFS_OK;
4704 struct nfs4_lock_state *lsp;
4705 struct nfs_server *server = NFS_SERVER(state->inode);
4707 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4708 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4709 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4710 if (status != NFS_OK) {
4711 nfs41_free_stateid(server, &lsp->ls_stateid);
4712 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4721 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4723 int status = NFS_OK;
4725 if (test_bit(LK_STATE_IN_USE, &state->flags))
4726 status = nfs41_check_expired_locks(state);
4727 if (status == NFS_OK)
4729 return nfs4_lock_expired(state, request);
4733 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4735 struct nfs_inode *nfsi = NFS_I(state->inode);
4736 unsigned char fl_flags = request->fl_flags;
4737 int status = -ENOLCK;
4739 if ((fl_flags & FL_POSIX) &&
4740 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4742 /* Is this a delegated open? */
4743 status = nfs4_set_lock_state(state, request);
4746 request->fl_flags |= FL_ACCESS;
4747 status = do_vfs_lock(request->fl_file, request);
4750 down_read(&nfsi->rwsem);
4751 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4752 /* Yes: cache locks! */
4753 /* ...but avoid races with delegation recall... */
4754 request->fl_flags = fl_flags & ~FL_SLEEP;
4755 status = do_vfs_lock(request->fl_file, request);
4758 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4761 /* Note: we always want to sleep here! */
4762 request->fl_flags = fl_flags | FL_SLEEP;
4763 if (do_vfs_lock(request->fl_file, request) < 0)
4764 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4765 "manager!\n", __func__);
4767 up_read(&nfsi->rwsem);
4769 request->fl_flags = fl_flags;
4773 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4775 struct nfs4_exception exception = {
4777 .inode = state->inode,
4782 err = _nfs4_proc_setlk(state, cmd, request);
4783 if (err == -NFS4ERR_DENIED)
4785 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4787 } while (exception.retry);
4792 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4794 struct nfs_open_context *ctx;
4795 struct nfs4_state *state;
4796 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4799 /* verify open state */
4800 ctx = nfs_file_open_context(filp);
4803 if (request->fl_start < 0 || request->fl_end < 0)
4806 if (IS_GETLK(cmd)) {
4808 return nfs4_proc_getlk(state, F_GETLK, request);
4812 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4815 if (request->fl_type == F_UNLCK) {
4817 return nfs4_proc_unlck(state, cmd, request);
4824 * Don't rely on the VFS having checked the file open mode,
4825 * since it won't do this for flock() locks.
4827 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4829 if (!(filp->f_mode & FMODE_READ))
4833 if (!(filp->f_mode & FMODE_WRITE))
4838 status = nfs4_proc_setlk(state, cmd, request);
4839 if ((status != -EAGAIN) || IS_SETLK(cmd))
4841 timeout = nfs4_set_lock_task_retry(timeout);
4842 status = -ERESTARTSYS;
4845 } while(status < 0);
4849 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4851 struct nfs_server *server = NFS_SERVER(state->inode);
4852 struct nfs4_exception exception = { };
4855 err = nfs4_set_lock_state(state, fl);
4859 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4862 printk(KERN_ERR "NFS: %s: unhandled error "
4863 "%d.\n", __func__, err);
4867 case -NFS4ERR_EXPIRED:
4868 nfs4_schedule_stateid_recovery(server, state);
4869 case -NFS4ERR_STALE_CLIENTID:
4870 case -NFS4ERR_STALE_STATEID:
4871 nfs4_schedule_lease_recovery(server->nfs_client);
4873 case -NFS4ERR_BADSESSION:
4874 case -NFS4ERR_BADSLOT:
4875 case -NFS4ERR_BAD_HIGH_SLOT:
4876 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4877 case -NFS4ERR_DEADSESSION:
4878 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4882 * The show must go on: exit, but mark the
4883 * stateid as needing recovery.
4885 case -NFS4ERR_DELEG_REVOKED:
4886 case -NFS4ERR_ADMIN_REVOKED:
4887 case -NFS4ERR_BAD_STATEID:
4888 case -NFS4ERR_OPENMODE:
4889 nfs4_schedule_stateid_recovery(server, state);
4894 * User RPCSEC_GSS context has expired.
4895 * We cannot recover this stateid now, so
4896 * skip it and allow recovery thread to
4902 case -NFS4ERR_DENIED:
4903 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4906 case -NFS4ERR_DELAY:
4909 err = nfs4_handle_exception(server, err, &exception);
4910 } while (exception.retry);
4915 struct nfs_release_lockowner_data {
4916 struct nfs4_lock_state *lsp;
4917 struct nfs_server *server;
4918 struct nfs_release_lockowner_args args;
4921 static void nfs4_release_lockowner_release(void *calldata)
4923 struct nfs_release_lockowner_data *data = calldata;
4924 nfs4_free_lock_state(data->server, data->lsp);
4928 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4929 .rpc_release = nfs4_release_lockowner_release,
4932 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4934 struct nfs_server *server = lsp->ls_state->owner->so_server;
4935 struct nfs_release_lockowner_data *data;
4936 struct rpc_message msg = {
4937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4940 if (server->nfs_client->cl_mvops->minor_version != 0)
4942 data = kmalloc(sizeof(*data), GFP_NOFS);
4946 data->server = server;
4947 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4948 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4949 data->args.lock_owner.s_dev = server->s_dev;
4950 msg.rpc_argp = &data->args;
4951 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4955 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4957 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4958 const void *buf, size_t buflen,
4959 int flags, int type)
4961 if (strcmp(key, "") != 0)
4964 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4967 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4968 void *buf, size_t buflen, int type)
4970 if (strcmp(key, "") != 0)
4973 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4976 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4977 size_t list_len, const char *name,
4978 size_t name_len, int type)
4980 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4982 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4985 if (list && len <= list_len)
4986 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4991 * nfs_fhget will use either the mounted_on_fileid or the fileid
4993 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4995 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4996 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4997 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4998 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5001 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5002 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5003 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5007 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5008 const struct qstr *name,
5009 struct nfs4_fs_locations *fs_locations,
5012 struct nfs_server *server = NFS_SERVER(dir);
5014 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5016 struct nfs4_fs_locations_arg args = {
5017 .dir_fh = NFS_FH(dir),
5022 struct nfs4_fs_locations_res res = {
5023 .fs_locations = fs_locations,
5025 struct rpc_message msg = {
5026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5032 dprintk("%s: start\n", __func__);
5034 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5035 * is not supported */
5036 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5037 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5039 bitmask[0] |= FATTR4_WORD0_FILEID;
5041 nfs_fattr_init(&fs_locations->fattr);
5042 fs_locations->server = server;
5043 fs_locations->nlocations = 0;
5044 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5045 dprintk("%s: returned status = %d\n", __func__, status);
5049 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5050 const struct qstr *name,
5051 struct nfs4_fs_locations *fs_locations,
5054 struct nfs4_exception exception = { };
5057 err = nfs4_handle_exception(NFS_SERVER(dir),
5058 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5060 } while (exception.retry);
5064 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5067 struct nfs4_secinfo_arg args = {
5068 .dir_fh = NFS_FH(dir),
5071 struct nfs4_secinfo_res res = {
5074 struct rpc_message msg = {
5075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5080 dprintk("NFS call secinfo %s\n", name->name);
5081 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5082 dprintk("NFS reply secinfo: %d\n", status);
5086 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5087 struct nfs4_secinfo_flavors *flavors)
5089 struct nfs4_exception exception = { };
5092 err = nfs4_handle_exception(NFS_SERVER(dir),
5093 _nfs4_proc_secinfo(dir, name, flavors),
5095 } while (exception.retry);
5099 #ifdef CONFIG_NFS_V4_1
5101 * Check the exchange flags returned by the server for invalid flags, having
5102 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5105 static int nfs4_check_cl_exchange_flags(u32 flags)
5107 if (flags & ~EXCHGID4_FLAG_MASK_R)
5109 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5110 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5112 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5116 return -NFS4ERR_INVAL;
5120 nfs41_same_server_scope(struct nfs41_server_scope *a,
5121 struct nfs41_server_scope *b)
5123 if (a->server_scope_sz == b->server_scope_sz &&
5124 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5131 * nfs4_proc_bind_conn_to_session()
5133 * The 4.1 client currently uses the same TCP connection for the
5134 * fore and backchannel.
5136 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5139 struct nfs41_bind_conn_to_session_res res;
5140 struct rpc_message msg = {
5142 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5148 dprintk("--> %s\n", __func__);
5149 BUG_ON(clp == NULL);
5151 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5152 if (unlikely(res.session == NULL)) {
5157 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5159 if (memcmp(res.session->sess_id.data,
5160 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5161 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5165 if (res.dir != NFS4_CDFS4_BOTH) {
5166 dprintk("NFS: %s: Unexpected direction from server\n",
5171 if (res.use_conn_in_rdma_mode) {
5172 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5181 dprintk("<-- %s status= %d\n", __func__, status);
5186 * nfs4_proc_exchange_id()
5188 * Since the clientid has expired, all compounds using sessions
5189 * associated with the stale clientid will be returning
5190 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5191 * be in some phase of session reset.
5193 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5195 nfs4_verifier verifier;
5196 struct nfs41_exchange_id_args args = {
5197 .verifier = &verifier,
5199 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5201 struct nfs41_exchange_id_res res = {
5205 struct rpc_message msg = {
5206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5212 dprintk("--> %s\n", __func__);
5213 BUG_ON(clp == NULL);
5215 nfs4_init_boot_verifier(clp, &verifier);
5217 args.id_len = scnprintf(args.id, sizeof(args.id),
5220 clp->cl_rpcclient->cl_nodename,
5221 clp->cl_rpcclient->cl_auth->au_flavor);
5223 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5225 if (unlikely(res.server_owner == NULL)) {
5230 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5232 if (unlikely(res.server_scope == NULL)) {
5234 goto out_server_owner;
5237 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5238 if (unlikely(res.impl_id == NULL)) {
5240 goto out_server_scope;
5243 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5245 status = nfs4_check_cl_exchange_flags(res.flags);
5248 clp->cl_clientid = res.clientid;
5249 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5250 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5251 clp->cl_seqid = res.seqid;
5253 kfree(clp->cl_serverowner);
5254 clp->cl_serverowner = res.server_owner;
5255 res.server_owner = NULL;
5257 /* use the most recent implementation id */
5258 kfree(clp->cl_implid);
5259 clp->cl_implid = res.impl_id;
5261 if (clp->cl_serverscope != NULL &&
5262 !nfs41_same_server_scope(clp->cl_serverscope,
5263 res.server_scope)) {
5264 dprintk("%s: server_scope mismatch detected\n",
5266 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5267 kfree(clp->cl_serverscope);
5268 clp->cl_serverscope = NULL;
5271 if (clp->cl_serverscope == NULL) {
5272 clp->cl_serverscope = res.server_scope;
5279 kfree(res.server_owner);
5281 kfree(res.server_scope);
5283 if (clp->cl_implid != NULL)
5284 dprintk("%s: Server Implementation ID: "
5285 "domain: %s, name: %s, date: %llu,%u\n",
5286 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5287 clp->cl_implid->date.seconds,
5288 clp->cl_implid->date.nseconds);
5289 dprintk("<-- %s status= %d\n", __func__, status);
5293 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5294 struct rpc_cred *cred)
5296 struct rpc_message msg = {
5297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5303 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5305 dprintk("NFS: Got error %d from the server %s on "
5306 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5310 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5311 struct rpc_cred *cred)
5316 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5317 ret = _nfs4_proc_destroy_clientid(clp, cred);
5319 case -NFS4ERR_DELAY:
5320 case -NFS4ERR_CLIENTID_BUSY:
5330 int nfs4_destroy_clientid(struct nfs_client *clp)
5332 struct rpc_cred *cred;
5335 if (clp->cl_mvops->minor_version < 1)
5337 if (clp->cl_exchange_flags == 0)
5339 cred = nfs4_get_exchange_id_cred(clp);
5340 ret = nfs4_proc_destroy_clientid(clp, cred);
5345 case -NFS4ERR_STALE_CLIENTID:
5346 clp->cl_exchange_flags = 0;
5352 struct nfs4_get_lease_time_data {
5353 struct nfs4_get_lease_time_args *args;
5354 struct nfs4_get_lease_time_res *res;
5355 struct nfs_client *clp;
5358 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5362 struct nfs4_get_lease_time_data *data =
5363 (struct nfs4_get_lease_time_data *)calldata;
5365 dprintk("--> %s\n", __func__);
5366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5367 /* just setup sequence, do not trigger session recovery
5368 since we're invoked within one */
5369 ret = nfs41_setup_sequence(data->clp->cl_session,
5370 &data->args->la_seq_args,
5371 &data->res->lr_seq_res, task);
5373 BUG_ON(ret == -EAGAIN);
5374 rpc_call_start(task);
5375 dprintk("<-- %s\n", __func__);
5379 * Called from nfs4_state_manager thread for session setup, so don't recover
5380 * from sequence operation or clientid errors.
5382 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5384 struct nfs4_get_lease_time_data *data =
5385 (struct nfs4_get_lease_time_data *)calldata;
5387 dprintk("--> %s\n", __func__);
5388 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5390 switch (task->tk_status) {
5391 case -NFS4ERR_DELAY:
5392 case -NFS4ERR_GRACE:
5393 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5394 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5395 task->tk_status = 0;
5397 case -NFS4ERR_RETRY_UNCACHED_REP:
5398 rpc_restart_call_prepare(task);
5401 dprintk("<-- %s\n", __func__);
5404 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5405 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5406 .rpc_call_done = nfs4_get_lease_time_done,
5409 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5411 struct rpc_task *task;
5412 struct nfs4_get_lease_time_args args;
5413 struct nfs4_get_lease_time_res res = {
5414 .lr_fsinfo = fsinfo,
5416 struct nfs4_get_lease_time_data data = {
5421 struct rpc_message msg = {
5422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5426 struct rpc_task_setup task_setup = {
5427 .rpc_client = clp->cl_rpcclient,
5428 .rpc_message = &msg,
5429 .callback_ops = &nfs4_get_lease_time_ops,
5430 .callback_data = &data,
5431 .flags = RPC_TASK_TIMEOUT,
5435 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5436 dprintk("--> %s\n", __func__);
5437 task = rpc_run_task(&task_setup);
5440 status = PTR_ERR(task);
5442 status = task->tk_status;
5445 dprintk("<-- %s return %d\n", __func__, status);
5450 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5452 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5455 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5456 struct nfs4_slot *new,
5460 struct nfs4_slot *old = NULL;
5463 spin_lock(&tbl->slot_tbl_lock);
5467 tbl->max_slots = max_slots;
5469 tbl->highest_used_slotid = -1; /* no slot is currently used */
5470 for (i = 0; i < tbl->max_slots; i++)
5471 tbl->slots[i].seq_nr = ivalue;
5472 spin_unlock(&tbl->slot_tbl_lock);
5477 * (re)Initialise a slot table
5479 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5482 struct nfs4_slot *new = NULL;
5485 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5486 max_reqs, tbl->max_slots);
5488 /* Does the newly negotiated max_reqs match the existing slot table? */
5489 if (max_reqs != tbl->max_slots) {
5490 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5496 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5497 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5498 tbl, tbl->slots, tbl->max_slots);
5500 dprintk("<-- %s: return %d\n", __func__, ret);
5504 /* Destroy the slot table */
5505 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5507 if (session->fc_slot_table.slots != NULL) {
5508 kfree(session->fc_slot_table.slots);
5509 session->fc_slot_table.slots = NULL;
5511 if (session->bc_slot_table.slots != NULL) {
5512 kfree(session->bc_slot_table.slots);
5513 session->bc_slot_table.slots = NULL;
5519 * Initialize or reset the forechannel and backchannel tables
5521 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5523 struct nfs4_slot_table *tbl;
5526 dprintk("--> %s\n", __func__);
5528 tbl = &ses->fc_slot_table;
5529 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5530 if (status) /* -ENOMEM */
5533 tbl = &ses->bc_slot_table;
5534 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5535 if (status && tbl->slots == NULL)
5536 /* Fore and back channel share a connection so get
5537 * both slot tables or neither */
5538 nfs4_destroy_slot_tables(ses);
5542 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5544 struct nfs4_session *session;
5545 struct nfs4_slot_table *tbl;
5547 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5551 tbl = &session->fc_slot_table;
5552 tbl->highest_used_slotid = NFS4_NO_SLOT;
5553 spin_lock_init(&tbl->slot_tbl_lock);
5554 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5555 init_completion(&tbl->complete);
5557 tbl = &session->bc_slot_table;
5558 tbl->highest_used_slotid = NFS4_NO_SLOT;
5559 spin_lock_init(&tbl->slot_tbl_lock);
5560 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5561 init_completion(&tbl->complete);
5563 session->session_state = 1<<NFS4_SESSION_INITING;
5569 void nfs4_destroy_session(struct nfs4_session *session)
5571 struct rpc_xprt *xprt;
5572 struct rpc_cred *cred;
5574 cred = nfs4_get_exchange_id_cred(session->clp);
5575 nfs4_proc_destroy_session(session, cred);
5580 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5582 dprintk("%s Destroy backchannel for xprt %p\n",
5584 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5585 nfs4_destroy_slot_tables(session);
5590 * Initialize the values to be used by the client in CREATE_SESSION
5591 * If nfs4_init_session set the fore channel request and response sizes,
5594 * Set the back channel max_resp_sz_cached to zero to force the client to
5595 * always set csa_cachethis to FALSE because the current implementation
5596 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5598 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5600 struct nfs4_session *session = args->client->cl_session;
5601 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5602 mxresp_sz = session->fc_attrs.max_resp_sz;
5605 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5607 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5608 /* Fore channel attributes */
5609 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5610 args->fc_attrs.max_resp_sz = mxresp_sz;
5611 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5612 args->fc_attrs.max_reqs = max_session_slots;
5614 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5615 "max_ops=%u max_reqs=%u\n",
5617 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5618 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5620 /* Back channel attributes */
5621 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5622 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5623 args->bc_attrs.max_resp_sz_cached = 0;
5624 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5625 args->bc_attrs.max_reqs = 1;
5627 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5628 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5630 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5631 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5632 args->bc_attrs.max_reqs);
5635 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5637 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5638 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5640 if (rcvd->max_resp_sz > sent->max_resp_sz)
5643 * Our requested max_ops is the minimum we need; we're not
5644 * prepared to break up compounds into smaller pieces than that.
5645 * So, no point even trying to continue if the server won't
5648 if (rcvd->max_ops < sent->max_ops)
5650 if (rcvd->max_reqs == 0)
5652 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5653 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5657 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5659 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5660 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5662 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5664 if (rcvd->max_resp_sz < sent->max_resp_sz)
5666 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5668 /* These would render the backchannel useless: */
5669 if (rcvd->max_ops != sent->max_ops)
5671 if (rcvd->max_reqs != sent->max_reqs)
5676 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5677 struct nfs4_session *session)
5681 ret = nfs4_verify_fore_channel_attrs(args, session);
5684 return nfs4_verify_back_channel_attrs(args, session);
5687 static int _nfs4_proc_create_session(struct nfs_client *clp,
5688 struct rpc_cred *cred)
5690 struct nfs4_session *session = clp->cl_session;
5691 struct nfs41_create_session_args args = {
5693 .cb_program = NFS4_CALLBACK,
5695 struct nfs41_create_session_res res = {
5698 struct rpc_message msg = {
5699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5706 nfs4_init_channel_attrs(&args);
5707 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5709 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5712 /* Verify the session's negotiated channel_attrs values */
5713 status = nfs4_verify_channel_attrs(&args, session);
5715 /* Increment the clientid slot sequence id */
5723 * Issues a CREATE_SESSION operation to the server.
5724 * It is the responsibility of the caller to verify the session is
5725 * expired before calling this routine.
5727 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5731 struct nfs4_session *session = clp->cl_session;
5733 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5735 status = _nfs4_proc_create_session(clp, cred);
5739 /* Init or reset the session slot tables */
5740 status = nfs4_setup_session_slot_tables(session);
5741 dprintk("slot table setup returned %d\n", status);
5745 ptr = (unsigned *)&session->sess_id.data[0];
5746 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5747 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5749 dprintk("<-- %s\n", __func__);
5754 * Issue the over-the-wire RPC DESTROY_SESSION.
5755 * The caller must serialize access to this routine.
5757 int nfs4_proc_destroy_session(struct nfs4_session *session,
5758 struct rpc_cred *cred)
5760 struct rpc_message msg = {
5761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5762 .rpc_argp = session,
5767 dprintk("--> nfs4_proc_destroy_session\n");
5769 /* session is still being setup */
5770 if (session->clp->cl_cons_state != NFS_CS_READY)
5773 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5776 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5777 "Session has been destroyed regardless...\n", status);
5779 dprintk("<-- nfs4_proc_destroy_session\n");
5784 * With sessions, the client is not marked ready until after a
5785 * successful EXCHANGE_ID and CREATE_SESSION.
5787 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5788 * other versions of NFS can be tried.
5790 static int nfs41_check_session_ready(struct nfs_client *clp)
5794 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5795 ret = nfs4_client_recover_expired_lease(clp);
5799 if (clp->cl_cons_state < NFS_CS_READY)
5800 return -EPROTONOSUPPORT;
5805 int nfs4_init_session(struct nfs_server *server)
5807 struct nfs_client *clp = server->nfs_client;
5808 struct nfs4_session *session;
5809 unsigned int rsize, wsize;
5811 if (!nfs4_has_session(clp))
5814 session = clp->cl_session;
5815 spin_lock(&clp->cl_lock);
5816 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5818 rsize = server->rsize;
5820 rsize = NFS_MAX_FILE_IO_SIZE;
5821 wsize = server->wsize;
5823 wsize = NFS_MAX_FILE_IO_SIZE;
5825 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5826 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5828 spin_unlock(&clp->cl_lock);
5830 return nfs41_check_session_ready(clp);
5833 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
5835 struct nfs4_session *session = clp->cl_session;
5838 spin_lock(&clp->cl_lock);
5839 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5841 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5842 * DS lease to be equal to the MDS lease.
5844 clp->cl_lease_time = lease_time;
5845 clp->cl_last_renewal = jiffies;
5847 spin_unlock(&clp->cl_lock);
5849 ret = nfs41_check_session_ready(clp);
5852 /* Test for the DS role */
5853 if (!is_ds_client(clp))
5857 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5861 * Renew the cl_session lease.
5863 struct nfs4_sequence_data {
5864 struct nfs_client *clp;
5865 struct nfs4_sequence_args args;
5866 struct nfs4_sequence_res res;
5869 static void nfs41_sequence_release(void *data)
5871 struct nfs4_sequence_data *calldata = data;
5872 struct nfs_client *clp = calldata->clp;
5874 if (atomic_read(&clp->cl_count) > 1)
5875 nfs4_schedule_state_renewal(clp);
5876 nfs_put_client(clp);
5880 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5882 switch(task->tk_status) {
5883 case -NFS4ERR_DELAY:
5884 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5887 nfs4_schedule_lease_recovery(clp);
5892 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5894 struct nfs4_sequence_data *calldata = data;
5895 struct nfs_client *clp = calldata->clp;
5897 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5900 if (task->tk_status < 0) {
5901 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5902 if (atomic_read(&clp->cl_count) == 1)
5905 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5906 rpc_restart_call_prepare(task);
5910 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5912 dprintk("<-- %s\n", __func__);
5915 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5917 struct nfs4_sequence_data *calldata = data;
5918 struct nfs_client *clp = calldata->clp;
5919 struct nfs4_sequence_args *args;
5920 struct nfs4_sequence_res *res;
5922 args = task->tk_msg.rpc_argp;
5923 res = task->tk_msg.rpc_resp;
5925 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5927 rpc_call_start(task);
5930 static const struct rpc_call_ops nfs41_sequence_ops = {
5931 .rpc_call_done = nfs41_sequence_call_done,
5932 .rpc_call_prepare = nfs41_sequence_prepare,
5933 .rpc_release = nfs41_sequence_release,
5936 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5938 struct nfs4_sequence_data *calldata;
5939 struct rpc_message msg = {
5940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5943 struct rpc_task_setup task_setup_data = {
5944 .rpc_client = clp->cl_rpcclient,
5945 .rpc_message = &msg,
5946 .callback_ops = &nfs41_sequence_ops,
5947 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5950 if (!atomic_inc_not_zero(&clp->cl_count))
5951 return ERR_PTR(-EIO);
5952 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5953 if (calldata == NULL) {
5954 nfs_put_client(clp);
5955 return ERR_PTR(-ENOMEM);
5957 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5958 msg.rpc_argp = &calldata->args;
5959 msg.rpc_resp = &calldata->res;
5960 calldata->clp = clp;
5961 task_setup_data.callback_data = calldata;
5963 return rpc_run_task(&task_setup_data);
5966 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5968 struct rpc_task *task;
5971 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5973 task = _nfs41_proc_sequence(clp, cred);
5975 ret = PTR_ERR(task);
5977 rpc_put_task_async(task);
5978 dprintk("<-- %s status=%d\n", __func__, ret);
5982 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5984 struct rpc_task *task;
5987 task = _nfs41_proc_sequence(clp, cred);
5989 ret = PTR_ERR(task);
5992 ret = rpc_wait_for_completion_task(task);
5994 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5996 if (task->tk_status == 0)
5997 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5998 ret = task->tk_status;
6002 dprintk("<-- %s status=%d\n", __func__, ret);
6006 struct nfs4_reclaim_complete_data {
6007 struct nfs_client *clp;
6008 struct nfs41_reclaim_complete_args arg;
6009 struct nfs41_reclaim_complete_res res;
6012 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6014 struct nfs4_reclaim_complete_data *calldata = data;
6016 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6017 if (nfs41_setup_sequence(calldata->clp->cl_session,
6018 &calldata->arg.seq_args,
6019 &calldata->res.seq_res, task))
6022 rpc_call_start(task);
6025 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6027 switch(task->tk_status) {
6029 case -NFS4ERR_COMPLETE_ALREADY:
6030 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6032 case -NFS4ERR_DELAY:
6033 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6035 case -NFS4ERR_RETRY_UNCACHED_REP:
6038 nfs4_schedule_lease_recovery(clp);
6043 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6045 struct nfs4_reclaim_complete_data *calldata = data;
6046 struct nfs_client *clp = calldata->clp;
6047 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6049 dprintk("--> %s\n", __func__);
6050 if (!nfs41_sequence_done(task, res))
6053 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6054 rpc_restart_call_prepare(task);
6057 dprintk("<-- %s\n", __func__);
6060 static void nfs4_free_reclaim_complete_data(void *data)
6062 struct nfs4_reclaim_complete_data *calldata = data;
6067 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6068 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6069 .rpc_call_done = nfs4_reclaim_complete_done,
6070 .rpc_release = nfs4_free_reclaim_complete_data,
6074 * Issue a global reclaim complete.
6076 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6078 struct nfs4_reclaim_complete_data *calldata;
6079 struct rpc_task *task;
6080 struct rpc_message msg = {
6081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6083 struct rpc_task_setup task_setup_data = {
6084 .rpc_client = clp->cl_rpcclient,
6085 .rpc_message = &msg,
6086 .callback_ops = &nfs4_reclaim_complete_call_ops,
6087 .flags = RPC_TASK_ASYNC,
6089 int status = -ENOMEM;
6091 dprintk("--> %s\n", __func__);
6092 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6093 if (calldata == NULL)
6095 calldata->clp = clp;
6096 calldata->arg.one_fs = 0;
6098 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6099 msg.rpc_argp = &calldata->arg;
6100 msg.rpc_resp = &calldata->res;
6101 task_setup_data.callback_data = calldata;
6102 task = rpc_run_task(&task_setup_data);
6104 status = PTR_ERR(task);
6107 status = nfs4_wait_for_completion_rpc_task(task);
6109 status = task->tk_status;
6113 dprintk("<-- %s status=%d\n", __func__, status);
6118 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6120 struct nfs4_layoutget *lgp = calldata;
6121 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6123 dprintk("--> %s\n", __func__);
6124 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6125 * right now covering the LAYOUTGET we are about to send.
6126 * However, that is not so catastrophic, and there seems
6127 * to be no way to prevent it completely.
6129 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6130 &lgp->res.seq_res, task))
6132 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6133 NFS_I(lgp->args.inode)->layout,
6134 lgp->args.ctx->state)) {
6135 rpc_exit(task, NFS4_OK);
6138 rpc_call_start(task);
6141 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6143 struct nfs4_layoutget *lgp = calldata;
6144 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6146 dprintk("--> %s\n", __func__);
6148 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6151 switch (task->tk_status) {
6154 case -NFS4ERR_LAYOUTTRYLATER:
6155 case -NFS4ERR_RECALLCONFLICT:
6156 task->tk_status = -NFS4ERR_DELAY;
6159 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6160 rpc_restart_call_prepare(task);
6164 dprintk("<-- %s\n", __func__);
6167 static void nfs4_layoutget_release(void *calldata)
6169 struct nfs4_layoutget *lgp = calldata;
6171 dprintk("--> %s\n", __func__);
6172 put_nfs_open_context(lgp->args.ctx);
6174 dprintk("<-- %s\n", __func__);
6177 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6178 .rpc_call_prepare = nfs4_layoutget_prepare,
6179 .rpc_call_done = nfs4_layoutget_done,
6180 .rpc_release = nfs4_layoutget_release,
6183 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6185 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6186 struct rpc_task *task;
6187 struct rpc_message msg = {
6188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6189 .rpc_argp = &lgp->args,
6190 .rpc_resp = &lgp->res,
6192 struct rpc_task_setup task_setup_data = {
6193 .rpc_client = server->client,
6194 .rpc_message = &msg,
6195 .callback_ops = &nfs4_layoutget_call_ops,
6196 .callback_data = lgp,
6197 .flags = RPC_TASK_ASYNC,
6201 dprintk("--> %s\n", __func__);
6203 lgp->res.layoutp = &lgp->args.layout;
6204 lgp->res.seq_res.sr_slot = NULL;
6205 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6206 task = rpc_run_task(&task_setup_data);
6208 return PTR_ERR(task);
6209 status = nfs4_wait_for_completion_rpc_task(task);
6211 status = task->tk_status;
6213 status = pnfs_layout_process(lgp);
6215 dprintk("<-- %s status=%d\n", __func__, status);
6220 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6222 struct nfs4_layoutreturn *lrp = calldata;
6224 dprintk("--> %s\n", __func__);
6225 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6226 &lrp->res.seq_res, task))
6228 rpc_call_start(task);
6231 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6233 struct nfs4_layoutreturn *lrp = calldata;
6234 struct nfs_server *server;
6235 struct pnfs_layout_hdr *lo = lrp->args.layout;
6237 dprintk("--> %s\n", __func__);
6239 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6242 server = NFS_SERVER(lrp->args.inode);
6243 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6244 rpc_restart_call_prepare(task);
6247 spin_lock(&lo->plh_inode->i_lock);
6248 if (task->tk_status == 0) {
6249 if (lrp->res.lrs_present) {
6250 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6252 BUG_ON(!list_empty(&lo->plh_segs));
6254 lo->plh_block_lgets--;
6255 spin_unlock(&lo->plh_inode->i_lock);
6256 dprintk("<-- %s\n", __func__);
6259 static void nfs4_layoutreturn_release(void *calldata)
6261 struct nfs4_layoutreturn *lrp = calldata;
6263 dprintk("--> %s\n", __func__);
6264 put_layout_hdr(lrp->args.layout);
6266 dprintk("<-- %s\n", __func__);
6269 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6270 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6271 .rpc_call_done = nfs4_layoutreturn_done,
6272 .rpc_release = nfs4_layoutreturn_release,
6275 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6277 struct rpc_task *task;
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6280 .rpc_argp = &lrp->args,
6281 .rpc_resp = &lrp->res,
6283 struct rpc_task_setup task_setup_data = {
6284 .rpc_client = lrp->clp->cl_rpcclient,
6285 .rpc_message = &msg,
6286 .callback_ops = &nfs4_layoutreturn_call_ops,
6287 .callback_data = lrp,
6291 dprintk("--> %s\n", __func__);
6292 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6293 task = rpc_run_task(&task_setup_data);
6295 return PTR_ERR(task);
6296 status = task->tk_status;
6297 dprintk("<-- %s status=%d\n", __func__, status);
6303 * Retrieve the list of Data Server devices from the MDS.
6305 static int _nfs4_getdevicelist(struct nfs_server *server,
6306 const struct nfs_fh *fh,
6307 struct pnfs_devicelist *devlist)
6309 struct nfs4_getdevicelist_args args = {
6311 .layoutclass = server->pnfs_curr_ld->id,
6313 struct nfs4_getdevicelist_res res = {
6316 struct rpc_message msg = {
6317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6323 dprintk("--> %s\n", __func__);
6324 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6326 dprintk("<-- %s status=%d\n", __func__, status);
6330 int nfs4_proc_getdevicelist(struct nfs_server *server,
6331 const struct nfs_fh *fh,
6332 struct pnfs_devicelist *devlist)
6334 struct nfs4_exception exception = { };
6338 err = nfs4_handle_exception(server,
6339 _nfs4_getdevicelist(server, fh, devlist),
6341 } while (exception.retry);
6343 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6344 err, devlist->num_devs);
6348 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6351 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6353 struct nfs4_getdeviceinfo_args args = {
6356 struct nfs4_getdeviceinfo_res res = {
6359 struct rpc_message msg = {
6360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6366 dprintk("--> %s\n", __func__);
6367 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6368 dprintk("<-- %s status=%d\n", __func__, status);
6373 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6375 struct nfs4_exception exception = { };
6379 err = nfs4_handle_exception(server,
6380 _nfs4_proc_getdeviceinfo(server, pdev),
6382 } while (exception.retry);
6385 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6387 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6389 struct nfs4_layoutcommit_data *data = calldata;
6390 struct nfs_server *server = NFS_SERVER(data->args.inode);
6392 if (nfs4_setup_sequence(server, &data->args.seq_args,
6393 &data->res.seq_res, task))
6395 rpc_call_start(task);
6399 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6401 struct nfs4_layoutcommit_data *data = calldata;
6402 struct nfs_server *server = NFS_SERVER(data->args.inode);
6404 if (!nfs4_sequence_done(task, &data->res.seq_res))
6407 switch (task->tk_status) { /* Just ignore these failures */
6408 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6409 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6410 case -NFS4ERR_BADLAYOUT: /* no layout */
6411 case -NFS4ERR_GRACE: /* loca_recalim always false */
6412 task->tk_status = 0;
6415 nfs_post_op_update_inode_force_wcc(data->args.inode,
6419 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6420 rpc_restart_call_prepare(task);
6426 static void nfs4_layoutcommit_release(void *calldata)
6428 struct nfs4_layoutcommit_data *data = calldata;
6429 struct pnfs_layout_segment *lseg, *tmp;
6430 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6432 pnfs_cleanup_layoutcommit(data);
6433 /* Matched by references in pnfs_set_layoutcommit */
6434 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6435 list_del_init(&lseg->pls_lc_list);
6436 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6441 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6442 smp_mb__after_clear_bit();
6443 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6445 put_rpccred(data->cred);
6449 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6450 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6451 .rpc_call_done = nfs4_layoutcommit_done,
6452 .rpc_release = nfs4_layoutcommit_release,
6456 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6458 struct rpc_message msg = {
6459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6460 .rpc_argp = &data->args,
6461 .rpc_resp = &data->res,
6462 .rpc_cred = data->cred,
6464 struct rpc_task_setup task_setup_data = {
6465 .task = &data->task,
6466 .rpc_client = NFS_CLIENT(data->args.inode),
6467 .rpc_message = &msg,
6468 .callback_ops = &nfs4_layoutcommit_ops,
6469 .callback_data = data,
6470 .flags = RPC_TASK_ASYNC,
6472 struct rpc_task *task;
6475 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6476 "lbw: %llu inode %lu\n",
6477 data->task.tk_pid, sync,
6478 data->args.lastbytewritten,
6479 data->args.inode->i_ino);
6481 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6482 task = rpc_run_task(&task_setup_data);
6484 return PTR_ERR(task);
6487 status = nfs4_wait_for_completion_rpc_task(task);
6490 status = task->tk_status;
6492 dprintk("%s: status %d\n", __func__, status);
6498 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6499 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6501 struct nfs41_secinfo_no_name_args args = {
6502 .style = SECINFO_STYLE_CURRENT_FH,
6504 struct nfs4_secinfo_res res = {
6507 struct rpc_message msg = {
6508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6512 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6516 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6517 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6519 struct nfs4_exception exception = { };
6522 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6525 case -NFS4ERR_WRONGSEC:
6526 case -NFS4ERR_NOTSUPP:
6529 err = nfs4_handle_exception(server, err, &exception);
6531 } while (exception.retry);
6537 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6538 struct nfs_fsinfo *info)
6542 rpc_authflavor_t flavor;
6543 struct nfs4_secinfo_flavors *flavors;
6545 page = alloc_page(GFP_KERNEL);
6551 flavors = page_address(page);
6552 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6555 * Fall back on "guess and check" method if
6556 * the server doesn't support SECINFO_NO_NAME
6558 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6559 err = nfs4_find_root_sec(server, fhandle, info);
6565 flavor = nfs_find_best_sec(flavors);
6567 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6577 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6580 struct nfs41_test_stateid_args args = {
6583 struct nfs41_test_stateid_res res;
6584 struct rpc_message msg = {
6585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6590 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6591 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6593 if (status == NFS_OK)
6598 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6600 struct nfs4_exception exception = { };
6603 err = nfs4_handle_exception(server,
6604 _nfs41_test_stateid(server, stateid),
6606 } while (exception.retry);
6610 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6612 struct nfs41_free_stateid_args args = {
6615 struct nfs41_free_stateid_res res;
6616 struct rpc_message msg = {
6617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6622 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6623 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6626 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6628 struct nfs4_exception exception = { };
6631 err = nfs4_handle_exception(server,
6632 _nfs4_free_stateid(server, stateid),
6634 } while (exception.retry);
6638 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6639 const nfs4_stateid *s2)
6641 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6644 if (s1->seqid == s2->seqid)
6646 if (s1->seqid == 0 || s2->seqid == 0)
6652 #endif /* CONFIG_NFS_V4_1 */
6654 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6655 const nfs4_stateid *s2)
6657 return nfs4_stateid_match(s1, s2);
6661 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6662 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6663 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6664 .recover_open = nfs4_open_reclaim,
6665 .recover_lock = nfs4_lock_reclaim,
6666 .establish_clid = nfs4_init_clientid,
6667 .get_clid_cred = nfs4_get_setclientid_cred,
6670 #if defined(CONFIG_NFS_V4_1)
6671 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6672 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6673 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6674 .recover_open = nfs4_open_reclaim,
6675 .recover_lock = nfs4_lock_reclaim,
6676 .establish_clid = nfs41_init_clientid,
6677 .get_clid_cred = nfs4_get_exchange_id_cred,
6678 .reclaim_complete = nfs41_proc_reclaim_complete,
6680 #endif /* CONFIG_NFS_V4_1 */
6682 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6683 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6684 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6685 .recover_open = nfs4_open_expired,
6686 .recover_lock = nfs4_lock_expired,
6687 .establish_clid = nfs4_init_clientid,
6688 .get_clid_cred = nfs4_get_setclientid_cred,
6691 #if defined(CONFIG_NFS_V4_1)
6692 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6693 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6694 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6695 .recover_open = nfs41_open_expired,
6696 .recover_lock = nfs41_lock_expired,
6697 .establish_clid = nfs41_init_clientid,
6698 .get_clid_cred = nfs4_get_exchange_id_cred,
6700 #endif /* CONFIG_NFS_V4_1 */
6702 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6703 .sched_state_renewal = nfs4_proc_async_renew,
6704 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6705 .renew_lease = nfs4_proc_renew,
6708 #if defined(CONFIG_NFS_V4_1)
6709 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6710 .sched_state_renewal = nfs41_proc_async_sequence,
6711 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6712 .renew_lease = nfs4_proc_sequence,
6716 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6718 .call_sync = _nfs4_call_sync,
6719 .match_stateid = nfs4_match_stateid,
6720 .find_root_sec = nfs4_find_root_sec,
6721 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6722 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6723 .state_renewal_ops = &nfs40_state_renewal_ops,
6726 #if defined(CONFIG_NFS_V4_1)
6727 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6729 .call_sync = _nfs4_call_sync_session,
6730 .match_stateid = nfs41_match_stateid,
6731 .find_root_sec = nfs41_find_root_sec,
6732 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6733 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6734 .state_renewal_ops = &nfs41_state_renewal_ops,
6738 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6739 [0] = &nfs_v4_0_minor_ops,
6740 #if defined(CONFIG_NFS_V4_1)
6741 [1] = &nfs_v4_1_minor_ops,
6745 static const struct inode_operations nfs4_file_inode_operations = {
6746 .permission = nfs_permission,
6747 .getattr = nfs_getattr,
6748 .setattr = nfs_setattr,
6749 .getxattr = generic_getxattr,
6750 .setxattr = generic_setxattr,
6751 .listxattr = generic_listxattr,
6752 .removexattr = generic_removexattr,
6755 const struct nfs_rpc_ops nfs_v4_clientops = {
6756 .version = 4, /* protocol version */
6757 .dentry_ops = &nfs4_dentry_operations,
6758 .dir_inode_ops = &nfs4_dir_inode_operations,
6759 .file_inode_ops = &nfs4_file_inode_operations,
6760 .file_ops = &nfs4_file_operations,
6761 .getroot = nfs4_proc_get_root,
6762 .submount = nfs4_submount,
6763 .getattr = nfs4_proc_getattr,
6764 .setattr = nfs4_proc_setattr,
6765 .lookup = nfs4_proc_lookup,
6766 .access = nfs4_proc_access,
6767 .readlink = nfs4_proc_readlink,
6768 .create = nfs4_proc_create,
6769 .remove = nfs4_proc_remove,
6770 .unlink_setup = nfs4_proc_unlink_setup,
6771 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6772 .unlink_done = nfs4_proc_unlink_done,
6773 .rename = nfs4_proc_rename,
6774 .rename_setup = nfs4_proc_rename_setup,
6775 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6776 .rename_done = nfs4_proc_rename_done,
6777 .link = nfs4_proc_link,
6778 .symlink = nfs4_proc_symlink,
6779 .mkdir = nfs4_proc_mkdir,
6780 .rmdir = nfs4_proc_remove,
6781 .readdir = nfs4_proc_readdir,
6782 .mknod = nfs4_proc_mknod,
6783 .statfs = nfs4_proc_statfs,
6784 .fsinfo = nfs4_proc_fsinfo,
6785 .pathconf = nfs4_proc_pathconf,
6786 .set_capabilities = nfs4_server_capabilities,
6787 .decode_dirent = nfs4_decode_dirent,
6788 .read_setup = nfs4_proc_read_setup,
6789 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6790 .read_done = nfs4_read_done,
6791 .write_setup = nfs4_proc_write_setup,
6792 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6793 .write_done = nfs4_write_done,
6794 .commit_setup = nfs4_proc_commit_setup,
6795 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6796 .commit_done = nfs4_commit_done,
6797 .lock = nfs4_proc_lock,
6798 .clear_acl_cache = nfs4_zap_acl_attr,
6799 .close_context = nfs4_close_context,
6800 .open_context = nfs4_atomic_open,
6801 .init_client = nfs4_init_client,
6804 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6805 .prefix = XATTR_NAME_NFSV4_ACL,
6806 .list = nfs4_xattr_list_nfs4_acl,
6807 .get = nfs4_xattr_get_nfs4_acl,
6808 .set = nfs4_xattr_set_nfs4_acl,
6811 const struct xattr_handler *nfs4_xattr_handlers[] = {
6812 &nfs4_xattr_nfs4_acl_handler,
6816 module_param(max_session_slots, ushort, 0644);
6817 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6818 "requests the client will negotiate");