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/file.h>
42 #include <linux/string.h>
43 #include <linux/ratelimit.h>
44 #include <linux/printk.h>
45 #include <linux/slab.h>
46 #include <linux/sunrpc/clnt.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/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4idmap.h"
67 #include "nfs4session.h"
70 #include "nfs4trace.h"
72 #define NFSDBG_FACILITY NFSDBG_PROC
74 #define NFS4_POLL_RETRY_MIN (HZ/10)
75 #define NFS4_POLL_RETRY_MAX (15*HZ)
77 /* file attributes which can be mapped to nfs attributes */
78 #define NFS4_VALID_ATTRS (ATTR_MODE \
89 static int _nfs4_proc_open(struct nfs4_opendata *data);
90 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
91 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
92 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
93 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
94 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
95 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
96 struct nfs_fattr *fattr, struct iattr *sattr,
97 struct nfs4_state *state, struct nfs4_label *ilabel,
98 struct nfs4_label *olabel);
99 #ifdef CONFIG_NFS_V4_1
100 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
102 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
103 struct rpc_cred *, bool);
106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
107 static inline struct nfs4_label *
108 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
109 struct iattr *sattr, struct nfs4_label *label)
116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
119 err = security_dentry_init_security(dentry, sattr->ia_mode,
120 &dentry->d_name, (void **)&label->label, &label->len);
127 nfs4_label_release_security(struct nfs4_label *label)
130 security_release_secctx(label->label, label->len);
132 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
135 return server->attr_bitmask;
137 return server->attr_bitmask_nl;
140 static inline struct nfs4_label *
141 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
142 struct iattr *sattr, struct nfs4_label *l)
145 nfs4_label_release_security(struct nfs4_label *label)
148 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
149 { return server->attr_bitmask; }
152 /* Prevent leaks of NFSv4 errors into userland */
153 static int nfs4_map_errors(int err)
158 case -NFS4ERR_RESOURCE:
159 case -NFS4ERR_LAYOUTTRYLATER:
160 case -NFS4ERR_RECALLCONFLICT:
162 case -NFS4ERR_WRONGSEC:
163 case -NFS4ERR_WRONG_CRED:
165 case -NFS4ERR_BADOWNER:
166 case -NFS4ERR_BADNAME:
168 case -NFS4ERR_SHARE_DENIED:
170 case -NFS4ERR_MINOR_VERS_MISMATCH:
171 return -EPROTONOSUPPORT;
172 case -NFS4ERR_FILE_OPEN:
175 dprintk("%s could not handle NFSv4 error %d\n",
183 * This is our standard bitmap for GETATTR requests.
185 const u32 nfs4_fattr_bitmap[3] = {
187 | FATTR4_WORD0_CHANGE
190 | FATTR4_WORD0_FILEID,
192 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID,
201 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
202 FATTR4_WORD2_SECURITY_LABEL
206 static const u32 nfs4_pnfs_open_bitmap[3] = {
208 | FATTR4_WORD0_CHANGE
211 | FATTR4_WORD0_FILEID,
213 | FATTR4_WORD1_NUMLINKS
215 | FATTR4_WORD1_OWNER_GROUP
216 | FATTR4_WORD1_RAWDEV
217 | FATTR4_WORD1_SPACE_USED
218 | FATTR4_WORD1_TIME_ACCESS
219 | FATTR4_WORD1_TIME_METADATA
220 | FATTR4_WORD1_TIME_MODIFY,
221 FATTR4_WORD2_MDSTHRESHOLD
222 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
223 | FATTR4_WORD2_SECURITY_LABEL
227 static const u32 nfs4_open_noattr_bitmap[3] = {
229 | FATTR4_WORD0_CHANGE
230 | FATTR4_WORD0_FILEID,
233 const u32 nfs4_statfs_bitmap[3] = {
234 FATTR4_WORD0_FILES_AVAIL
235 | FATTR4_WORD0_FILES_FREE
236 | FATTR4_WORD0_FILES_TOTAL,
237 FATTR4_WORD1_SPACE_AVAIL
238 | FATTR4_WORD1_SPACE_FREE
239 | FATTR4_WORD1_SPACE_TOTAL
242 const u32 nfs4_pathconf_bitmap[3] = {
244 | FATTR4_WORD0_MAXNAME,
248 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
249 | FATTR4_WORD0_MAXREAD
250 | FATTR4_WORD0_MAXWRITE
251 | FATTR4_WORD0_LEASE_TIME,
252 FATTR4_WORD1_TIME_DELTA
253 | FATTR4_WORD1_FS_LAYOUT_TYPES,
254 FATTR4_WORD2_LAYOUT_BLKSIZE
255 | FATTR4_WORD2_CLONE_BLKSIZE
258 const u32 nfs4_fs_locations_bitmap[3] = {
260 | FATTR4_WORD0_CHANGE
263 | FATTR4_WORD0_FILEID
264 | FATTR4_WORD0_FS_LOCATIONS,
266 | FATTR4_WORD1_NUMLINKS
268 | FATTR4_WORD1_OWNER_GROUP
269 | FATTR4_WORD1_RAWDEV
270 | FATTR4_WORD1_SPACE_USED
271 | FATTR4_WORD1_TIME_ACCESS
272 | FATTR4_WORD1_TIME_METADATA
273 | FATTR4_WORD1_TIME_MODIFY
274 | FATTR4_WORD1_MOUNTED_ON_FILEID,
277 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
278 struct nfs4_readdir_arg *readdir)
283 readdir->cookie = cookie;
284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
289 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
294 * NFSv4 servers do not return entries for '.' and '..'
295 * Therefore, we fake these entries here. We let '.'
296 * have cookie 0 and '..' have cookie 1. Note that
297 * when talking to the server, we always send cookie 0
300 start = p = kmap_atomic(*readdir->pages);
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_one; /* cookie, second word */
306 *p++ = xdr_one; /* entry len */
307 memcpy(p, ".\0\0\0", 4); /* entry */
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
321 *p++ = xdr_one; /* bitmap length */
322 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
323 *p++ = htonl(8); /* attribute buffer length */
324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
326 readdir->pgbase = (char *)p - (char *)start;
327 readdir->count -= readdir->pgbase;
328 kunmap_atomic(start);
331 static void nfs4_test_and_free_stateid(struct nfs_server *server,
332 nfs4_stateid *stateid,
333 struct rpc_cred *cred)
335 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
337 ops->test_and_free_expired(server, stateid, cred);
340 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
341 nfs4_stateid *stateid,
342 struct rpc_cred *cred)
344 stateid->type = NFS4_REVOKED_STATEID_TYPE;
345 nfs4_test_and_free_stateid(server, stateid, cred);
348 static void nfs4_free_revoked_stateid(struct nfs_server *server,
349 const nfs4_stateid *stateid,
350 struct rpc_cred *cred)
354 nfs4_stateid_copy(&tmp, stateid);
355 __nfs4_free_revoked_stateid(server, &tmp, cred);
358 static long nfs4_update_delay(long *timeout)
362 return NFS4_POLL_RETRY_MAX;
364 *timeout = NFS4_POLL_RETRY_MIN;
365 if (*timeout > NFS4_POLL_RETRY_MAX)
366 *timeout = NFS4_POLL_RETRY_MAX;
372 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
378 freezable_schedule_timeout_killable_unsafe(
379 nfs4_update_delay(timeout));
380 if (fatal_signal_pending(current))
385 /* This is the error handling routine for processes that are allowed
388 static int nfs4_do_handle_exception(struct nfs_server *server,
389 int errorcode, struct nfs4_exception *exception)
391 struct nfs_client *clp = server->nfs_client;
392 struct nfs4_state *state = exception->state;
393 const nfs4_stateid *stateid = exception->stateid;
394 struct inode *inode = exception->inode;
397 exception->delay = 0;
398 exception->recovering = 0;
399 exception->retry = 0;
401 if (stateid == NULL && state != NULL)
402 stateid = &state->stateid;
407 case -NFS4ERR_DELEG_REVOKED:
408 case -NFS4ERR_ADMIN_REVOKED:
409 case -NFS4ERR_EXPIRED:
410 case -NFS4ERR_BAD_STATEID:
411 if (inode != NULL && stateid != NULL) {
412 nfs_inode_find_state_and_recover(inode,
414 goto wait_on_recovery;
416 case -NFS4ERR_OPENMODE:
420 err = nfs_async_inode_return_delegation(inode,
423 goto wait_on_recovery;
424 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
425 exception->retry = 1;
431 ret = nfs4_schedule_stateid_recovery(server, state);
434 goto wait_on_recovery;
435 case -NFS4ERR_STALE_STATEID:
436 case -NFS4ERR_STALE_CLIENTID:
437 nfs4_schedule_lease_recovery(clp);
438 goto wait_on_recovery;
440 ret = nfs4_schedule_migration_recovery(server);
443 goto wait_on_recovery;
444 case -NFS4ERR_LEASE_MOVED:
445 nfs4_schedule_lease_moved_recovery(clp);
446 goto wait_on_recovery;
447 #if defined(CONFIG_NFS_V4_1)
448 case -NFS4ERR_BADSESSION:
449 case -NFS4ERR_BADSLOT:
450 case -NFS4ERR_BAD_HIGH_SLOT:
451 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
452 case -NFS4ERR_DEADSESSION:
453 case -NFS4ERR_SEQ_FALSE_RETRY:
454 case -NFS4ERR_SEQ_MISORDERED:
455 dprintk("%s ERROR: %d Reset session\n", __func__,
457 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
458 goto wait_on_recovery;
459 #endif /* defined(CONFIG_NFS_V4_1) */
460 case -NFS4ERR_FILE_OPEN:
461 if (exception->timeout > HZ) {
462 /* We have retried a decent amount, time to
469 nfs_inc_server_stats(server, NFSIOS_DELAY);
471 case -NFS4ERR_LAYOUTTRYLATER:
472 case -NFS4ERR_RECALLCONFLICT:
473 exception->delay = 1;
476 case -NFS4ERR_RETRY_UNCACHED_REP:
477 case -NFS4ERR_OLD_STATEID:
478 exception->retry = 1;
480 case -NFS4ERR_BADOWNER:
481 /* The following works around a Linux server bug! */
482 case -NFS4ERR_BADNAME:
483 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
484 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
485 exception->retry = 1;
486 printk(KERN_WARNING "NFS: v4 server %s "
487 "does not accept raw "
489 "Reenabling the idmapper.\n",
490 server->nfs_client->cl_hostname);
493 /* We failed to handle the error */
494 return nfs4_map_errors(ret);
496 exception->recovering = 1;
500 /* This is the error handling routine for processes that are allowed
503 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
505 struct nfs_client *clp = server->nfs_client;
508 ret = nfs4_do_handle_exception(server, errorcode, exception);
509 if (exception->delay) {
510 ret = nfs4_delay(server->client, &exception->timeout);
513 if (exception->recovering) {
514 ret = nfs4_wait_clnt_recover(clp);
515 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
522 exception->retry = 1;
527 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
528 int errorcode, struct nfs4_exception *exception)
530 struct nfs_client *clp = server->nfs_client;
533 ret = nfs4_do_handle_exception(server, errorcode, exception);
534 if (exception->delay) {
535 rpc_delay(task, nfs4_update_delay(&exception->timeout));
538 if (exception->recovering) {
539 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
540 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
541 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
544 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
549 exception->retry = 1;
554 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
555 struct nfs4_state *state, long *timeout)
557 struct nfs4_exception exception = {
561 if (task->tk_status >= 0)
564 exception.timeout = *timeout;
565 task->tk_status = nfs4_async_handle_exception(task, server,
568 if (exception.delay && timeout)
569 *timeout = exception.timeout;
576 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
577 * or 'false' otherwise.
579 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
581 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
583 if (flavor == RPC_AUTH_GSS_KRB5I ||
584 flavor == RPC_AUTH_GSS_KRB5P)
590 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
592 spin_lock(&clp->cl_lock);
593 if (time_before(clp->cl_last_renewal,timestamp))
594 clp->cl_last_renewal = timestamp;
595 spin_unlock(&clp->cl_lock);
598 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
600 struct nfs_client *clp = server->nfs_client;
602 if (!nfs4_has_session(clp))
603 do_renew_lease(clp, timestamp);
606 struct nfs4_call_sync_data {
607 const struct nfs_server *seq_server;
608 struct nfs4_sequence_args *seq_args;
609 struct nfs4_sequence_res *seq_res;
612 void nfs4_init_sequence(struct nfs4_sequence_args *args,
613 struct nfs4_sequence_res *res, int cache_reply)
615 args->sa_slot = NULL;
616 args->sa_cache_this = cache_reply;
617 args->sa_privileged = 0;
622 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
624 args->sa_privileged = 1;
627 int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
628 struct nfs4_sequence_args *args,
629 struct nfs4_sequence_res *res,
630 struct rpc_task *task)
632 struct nfs4_slot *slot;
634 /* slot already allocated? */
635 if (res->sr_slot != NULL)
638 spin_lock(&tbl->slot_tbl_lock);
639 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
642 slot = nfs4_alloc_slot(tbl);
644 if (slot == ERR_PTR(-ENOMEM))
645 task->tk_timeout = HZ >> 2;
648 spin_unlock(&tbl->slot_tbl_lock);
650 slot->privileged = args->sa_privileged ? 1 : 0;
651 args->sa_slot = slot;
655 rpc_call_start(task);
659 if (args->sa_privileged)
660 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
661 NULL, RPC_PRIORITY_PRIVILEGED);
663 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
664 spin_unlock(&tbl->slot_tbl_lock);
667 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
669 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
671 struct nfs4_slot *slot = res->sr_slot;
672 struct nfs4_slot_table *tbl;
675 spin_lock(&tbl->slot_tbl_lock);
676 if (!nfs41_wake_and_assign_slot(tbl, slot))
677 nfs4_free_slot(tbl, slot);
678 spin_unlock(&tbl->slot_tbl_lock);
683 static int nfs40_sequence_done(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
686 if (res->sr_slot != NULL)
687 nfs40_sequence_free_slot(res);
691 #if defined(CONFIG_NFS_V4_1)
693 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
695 struct nfs4_session *session;
696 struct nfs4_slot_table *tbl;
697 struct nfs4_slot *slot = res->sr_slot;
698 bool send_new_highest_used_slotid = false;
701 session = tbl->session;
703 /* Bump the slot sequence number */
708 spin_lock(&tbl->slot_tbl_lock);
709 /* Be nice to the server: try to ensure that the last transmitted
710 * value for highest_user_slotid <= target_highest_slotid
712 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
713 send_new_highest_used_slotid = true;
715 if (nfs41_wake_and_assign_slot(tbl, slot)) {
716 send_new_highest_used_slotid = false;
719 nfs4_free_slot(tbl, slot);
721 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
722 send_new_highest_used_slotid = false;
724 spin_unlock(&tbl->slot_tbl_lock);
726 if (send_new_highest_used_slotid)
727 nfs41_notify_server(session->clp);
728 if (waitqueue_active(&tbl->slot_waitq))
729 wake_up_all(&tbl->slot_waitq);
732 static int nfs41_sequence_process(struct rpc_task *task,
733 struct nfs4_sequence_res *res)
735 struct nfs4_session *session;
736 struct nfs4_slot *slot = res->sr_slot;
737 struct nfs_client *clp;
738 bool interrupted = false;
743 /* don't increment the sequence number if the task wasn't sent */
744 if (!RPC_WAS_SENT(task))
747 session = slot->table->session;
749 if (slot->interrupted) {
750 slot->interrupted = 0;
754 trace_nfs4_sequence_done(session, res);
755 /* Check the SEQUENCE operation status */
756 switch (res->sr_status) {
758 /* If previous op on slot was interrupted and we reused
759 * the seq# and got a reply from the cache, then retry
761 if (task->tk_status == -EREMOTEIO && interrupted) {
765 /* Update the slot's sequence and clientid lease timer */
768 do_renew_lease(clp, res->sr_timestamp);
769 /* Check sequence flags */
770 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
772 nfs41_update_target_slotid(slot->table, slot, res);
776 * sr_status remains 1 if an RPC level error occurred.
777 * The server may or may not have processed the sequence
779 * Mark the slot as having hosted an interrupted RPC call.
781 slot->interrupted = 1;
784 /* The server detected a resend of the RPC call and
785 * returned NFS4ERR_DELAY as per Section 2.10.6.2
788 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
793 case -NFS4ERR_BADSLOT:
795 * The slot id we used was probably retired. Try again
796 * using a different slot id.
799 case -NFS4ERR_SEQ_MISORDERED:
801 * Was the last operation on this sequence interrupted?
802 * If so, retry after bumping the sequence number.
809 * Could this slot have been previously retired?
810 * If so, then the server may be expecting seq_nr = 1!
812 if (slot->seq_nr != 1) {
817 case -NFS4ERR_SEQ_FALSE_RETRY:
821 /* Just update the slot sequence no. */
825 /* The session may be reset by one of the error handlers. */
826 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
830 if (rpc_restart_call_prepare(task)) {
831 nfs41_sequence_free_slot(res);
837 if (!rpc_restart_call(task))
839 rpc_delay(task, NFS4_POLL_RETRY_MAX);
843 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
845 if (!nfs41_sequence_process(task, res))
847 if (res->sr_slot != NULL)
848 nfs41_sequence_free_slot(res);
852 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
854 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
856 if (res->sr_slot == NULL)
858 if (res->sr_slot->table->session != NULL)
859 return nfs41_sequence_process(task, res);
860 return nfs40_sequence_done(task, res);
863 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
865 if (res->sr_slot != NULL) {
866 if (res->sr_slot->table->session != NULL)
867 nfs41_sequence_free_slot(res);
869 nfs40_sequence_free_slot(res);
873 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
875 if (res->sr_slot == NULL)
877 if (!res->sr_slot->table->session)
878 return nfs40_sequence_done(task, res);
879 return nfs41_sequence_done(task, res);
881 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
883 int nfs41_setup_sequence(struct nfs4_session *session,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 struct rpc_task *task)
888 struct nfs4_slot *slot;
889 struct nfs4_slot_table *tbl;
891 dprintk("--> %s\n", __func__);
892 /* slot already allocated? */
893 if (res->sr_slot != NULL)
896 tbl = &session->fc_slot_table;
898 task->tk_timeout = 0;
900 spin_lock(&tbl->slot_tbl_lock);
901 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
902 !args->sa_privileged) {
903 /* The state manager will wait until the slot table is empty */
904 dprintk("%s session is draining\n", __func__);
908 slot = nfs4_alloc_slot(tbl);
910 /* If out of memory, try again in 1/4 second */
911 if (slot == ERR_PTR(-ENOMEM))
912 task->tk_timeout = HZ >> 2;
913 dprintk("<-- %s: no free slots\n", __func__);
916 spin_unlock(&tbl->slot_tbl_lock);
918 slot->privileged = args->sa_privileged ? 1 : 0;
919 args->sa_slot = slot;
921 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
922 slot->slot_nr, slot->seq_nr);
925 res->sr_timestamp = jiffies;
926 res->sr_status_flags = 0;
928 * sr_status is only set in decode_sequence, and so will remain
929 * set to 1 if an rpc level failure occurs.
932 trace_nfs4_setup_sequence(session, args);
934 rpc_call_start(task);
937 /* Privileged tasks are queued with top priority */
938 if (args->sa_privileged)
939 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
940 NULL, RPC_PRIORITY_PRIVILEGED);
942 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
943 spin_unlock(&tbl->slot_tbl_lock);
946 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
948 static int nfs4_setup_sequence(const struct nfs_server *server,
949 struct nfs4_sequence_args *args,
950 struct nfs4_sequence_res *res,
951 struct rpc_task *task)
953 struct nfs4_session *session = nfs4_get_session(server);
957 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
960 dprintk("--> %s clp %p session %p sr_slot %u\n",
961 __func__, session->clp, session, res->sr_slot ?
962 res->sr_slot->slot_nr : NFS4_NO_SLOT);
964 ret = nfs41_setup_sequence(session, args, res, task);
966 dprintk("<-- %s status=%d\n", __func__, ret);
970 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
972 struct nfs4_call_sync_data *data = calldata;
973 struct nfs4_session *session = nfs4_get_session(data->seq_server);
975 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
977 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
980 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
982 struct nfs4_call_sync_data *data = calldata;
984 nfs41_sequence_done(task, data->seq_res);
987 static const struct rpc_call_ops nfs41_call_sync_ops = {
988 .rpc_call_prepare = nfs41_call_sync_prepare,
989 .rpc_call_done = nfs41_call_sync_done,
992 #else /* !CONFIG_NFS_V4_1 */
994 static int nfs4_setup_sequence(const struct nfs_server *server,
995 struct nfs4_sequence_args *args,
996 struct nfs4_sequence_res *res,
997 struct rpc_task *task)
999 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
1003 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1005 return nfs40_sequence_done(task, res);
1008 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1010 if (res->sr_slot != NULL)
1011 nfs40_sequence_free_slot(res);
1014 int nfs4_sequence_done(struct rpc_task *task,
1015 struct nfs4_sequence_res *res)
1017 return nfs40_sequence_done(task, res);
1019 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
1021 #endif /* !CONFIG_NFS_V4_1 */
1023 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1025 struct nfs4_call_sync_data *data = calldata;
1026 nfs4_setup_sequence(data->seq_server,
1027 data->seq_args, data->seq_res, task);
1030 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1032 struct nfs4_call_sync_data *data = calldata;
1033 nfs4_sequence_done(task, data->seq_res);
1036 static const struct rpc_call_ops nfs40_call_sync_ops = {
1037 .rpc_call_prepare = nfs40_call_sync_prepare,
1038 .rpc_call_done = nfs40_call_sync_done,
1041 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1042 struct nfs_server *server,
1043 struct rpc_message *msg,
1044 struct nfs4_sequence_args *args,
1045 struct nfs4_sequence_res *res)
1048 struct rpc_task *task;
1049 struct nfs_client *clp = server->nfs_client;
1050 struct nfs4_call_sync_data data = {
1051 .seq_server = server,
1055 struct rpc_task_setup task_setup = {
1058 .callback_ops = clp->cl_mvops->call_sync_ops,
1059 .callback_data = &data
1062 task = rpc_run_task(&task_setup);
1064 ret = PTR_ERR(task);
1066 ret = task->tk_status;
1072 int nfs4_call_sync(struct rpc_clnt *clnt,
1073 struct nfs_server *server,
1074 struct rpc_message *msg,
1075 struct nfs4_sequence_args *args,
1076 struct nfs4_sequence_res *res,
1079 nfs4_init_sequence(args, res, cache_reply);
1080 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1083 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1085 struct nfs_inode *nfsi = NFS_I(dir);
1087 spin_lock(&dir->i_lock);
1088 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1089 if (!cinfo->atomic || cinfo->before != dir->i_version)
1090 nfs_force_lookup_revalidate(dir);
1091 dir->i_version = cinfo->after;
1092 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1093 nfs_fscache_invalidate(dir);
1094 spin_unlock(&dir->i_lock);
1097 struct nfs4_opendata {
1099 struct nfs_openargs o_arg;
1100 struct nfs_openres o_res;
1101 struct nfs_open_confirmargs c_arg;
1102 struct nfs_open_confirmres c_res;
1103 struct nfs4_string owner_name;
1104 struct nfs4_string group_name;
1105 struct nfs4_label *a_label;
1106 struct nfs_fattr f_attr;
1107 struct nfs4_label *f_label;
1109 struct dentry *dentry;
1110 struct nfs4_state_owner *owner;
1111 struct nfs4_state *state;
1113 unsigned long timestamp;
1114 unsigned int rpc_done : 1;
1115 unsigned int file_created : 1;
1116 unsigned int is_recover : 1;
1121 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1122 int err, struct nfs4_exception *exception)
1126 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1128 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1129 exception->retry = 1;
1134 nfs4_map_atomic_open_share(struct nfs_server *server,
1135 fmode_t fmode, int openflags)
1139 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1141 res = NFS4_SHARE_ACCESS_READ;
1144 res = NFS4_SHARE_ACCESS_WRITE;
1146 case FMODE_READ|FMODE_WRITE:
1147 res = NFS4_SHARE_ACCESS_BOTH;
1149 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1151 /* Want no delegation if we're using O_DIRECT */
1152 if (openflags & O_DIRECT)
1153 res |= NFS4_SHARE_WANT_NO_DELEG;
1158 static enum open_claim_type4
1159 nfs4_map_atomic_open_claim(struct nfs_server *server,
1160 enum open_claim_type4 claim)
1162 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1167 case NFS4_OPEN_CLAIM_FH:
1168 return NFS4_OPEN_CLAIM_NULL;
1169 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1170 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1171 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1172 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1176 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1178 p->o_res.f_attr = &p->f_attr;
1179 p->o_res.f_label = p->f_label;
1180 p->o_res.seqid = p->o_arg.seqid;
1181 p->c_res.seqid = p->c_arg.seqid;
1182 p->o_res.server = p->o_arg.server;
1183 p->o_res.access_request = p->o_arg.access;
1184 nfs_fattr_init(&p->f_attr);
1185 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1188 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1189 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1190 const struct iattr *attrs,
1191 struct nfs4_label *label,
1192 enum open_claim_type4 claim,
1195 struct dentry *parent = dget_parent(dentry);
1196 struct inode *dir = d_inode(parent);
1197 struct nfs_server *server = NFS_SERVER(dir);
1198 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1199 struct nfs4_opendata *p;
1201 p = kzalloc(sizeof(*p), gfp_mask);
1205 p->f_label = nfs4_label_alloc(server, gfp_mask);
1206 if (IS_ERR(p->f_label))
1209 p->a_label = nfs4_label_alloc(server, gfp_mask);
1210 if (IS_ERR(p->a_label))
1213 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1214 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1215 if (IS_ERR(p->o_arg.seqid))
1216 goto err_free_label;
1217 nfs_sb_active(dentry->d_sb);
1218 p->dentry = dget(dentry);
1221 atomic_inc(&sp->so_count);
1222 p->o_arg.open_flags = flags;
1223 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1224 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1226 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1227 * will return permission denied for all bits until close */
1228 if (!(flags & O_EXCL)) {
1229 /* ask server to check for all possible rights as results
1231 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1232 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1234 p->o_arg.clientid = server->nfs_client->cl_clientid;
1235 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1236 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1237 p->o_arg.name = &dentry->d_name;
1238 p->o_arg.server = server;
1239 p->o_arg.bitmask = nfs4_bitmask(server, label);
1240 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1241 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1242 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1243 switch (p->o_arg.claim) {
1244 case NFS4_OPEN_CLAIM_NULL:
1245 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1246 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1247 p->o_arg.fh = NFS_FH(dir);
1249 case NFS4_OPEN_CLAIM_PREVIOUS:
1250 case NFS4_OPEN_CLAIM_FH:
1251 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1252 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1253 p->o_arg.fh = NFS_FH(d_inode(dentry));
1255 if (attrs != NULL && attrs->ia_valid != 0) {
1258 p->o_arg.u.attrs = &p->attrs;
1259 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1262 verf[1] = current->pid;
1263 memcpy(p->o_arg.u.verifier.data, verf,
1264 sizeof(p->o_arg.u.verifier.data));
1266 p->c_arg.fh = &p->o_res.fh;
1267 p->c_arg.stateid = &p->o_res.stateid;
1268 p->c_arg.seqid = p->o_arg.seqid;
1269 nfs4_init_opendata_res(p);
1270 kref_init(&p->kref);
1274 nfs4_label_free(p->a_label);
1276 nfs4_label_free(p->f_label);
1284 static void nfs4_opendata_free(struct kref *kref)
1286 struct nfs4_opendata *p = container_of(kref,
1287 struct nfs4_opendata, kref);
1288 struct super_block *sb = p->dentry->d_sb;
1290 nfs_free_seqid(p->o_arg.seqid);
1291 nfs4_sequence_free_slot(&p->o_res.seq_res);
1292 if (p->state != NULL)
1293 nfs4_put_open_state(p->state);
1294 nfs4_put_state_owner(p->owner);
1296 nfs4_label_free(p->a_label);
1297 nfs4_label_free(p->f_label);
1301 nfs_sb_deactive(sb);
1302 nfs_fattr_free_names(&p->f_attr);
1303 kfree(p->f_attr.mdsthreshold);
1307 static void nfs4_opendata_put(struct nfs4_opendata *p)
1310 kref_put(&p->kref, nfs4_opendata_free);
1313 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1317 ret = rpc_wait_for_completion_task(task);
1321 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1324 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1325 case FMODE_READ|FMODE_WRITE:
1326 return state->n_rdwr != 0;
1328 return state->n_wronly != 0;
1330 return state->n_rdonly != 0;
1336 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1340 if (open_mode & (O_EXCL|O_TRUNC))
1342 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1344 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1345 && state->n_rdonly != 0;
1348 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1349 && state->n_wronly != 0;
1351 case FMODE_READ|FMODE_WRITE:
1352 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1353 && state->n_rdwr != 0;
1359 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1360 enum open_claim_type4 claim)
1362 if (delegation == NULL)
1364 if ((delegation->type & fmode) != fmode)
1366 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1369 case NFS4_OPEN_CLAIM_NULL:
1370 case NFS4_OPEN_CLAIM_FH:
1372 case NFS4_OPEN_CLAIM_PREVIOUS:
1373 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1378 nfs_mark_delegation_referenced(delegation);
1382 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1391 case FMODE_READ|FMODE_WRITE:
1394 nfs4_state_set_mode_locked(state, state->state | fmode);
1397 #ifdef CONFIG_NFS_V4_1
1398 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1400 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1402 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1404 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1408 #endif /* CONFIG_NFS_V4_1 */
1410 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1412 struct nfs_client *clp = state->owner->so_server->nfs_client;
1413 bool need_recover = false;
1415 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1416 need_recover = true;
1417 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1418 need_recover = true;
1419 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1420 need_recover = true;
1422 nfs4_state_mark_reclaim_nograce(clp, state);
1425 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1426 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1428 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1430 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1431 nfs4_stateid_copy(freeme, &state->open_stateid);
1432 nfs_test_and_clear_all_open_stateid(state);
1435 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1440 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1442 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1444 if (state->n_wronly)
1445 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1446 if (state->n_rdonly)
1447 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1449 set_bit(NFS_O_RDWR_STATE, &state->flags);
1450 set_bit(NFS_OPEN_STATE, &state->flags);
1453 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1454 nfs4_stateid *stateid, fmode_t fmode)
1456 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1457 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1459 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1462 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1465 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1467 clear_bit(NFS_OPEN_STATE, &state->flags);
1469 if (stateid == NULL)
1471 /* Handle OPEN+OPEN_DOWNGRADE races */
1472 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1473 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1474 nfs_resync_open_stateid_locked(state);
1477 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1478 nfs4_stateid_copy(&state->stateid, stateid);
1479 nfs4_stateid_copy(&state->open_stateid, stateid);
1482 static void nfs_clear_open_stateid(struct nfs4_state *state,
1483 nfs4_stateid *arg_stateid,
1484 nfs4_stateid *stateid, fmode_t fmode)
1486 write_seqlock(&state->seqlock);
1487 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1488 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1489 nfs_clear_open_stateid_locked(state, stateid, fmode);
1490 write_sequnlock(&state->seqlock);
1491 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1492 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1495 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1496 const nfs4_stateid *stateid, fmode_t fmode,
1497 nfs4_stateid *freeme)
1501 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1504 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1506 case FMODE_READ|FMODE_WRITE:
1507 set_bit(NFS_O_RDWR_STATE, &state->flags);
1509 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1511 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1512 nfs4_stateid_copy(&state->stateid, stateid);
1513 nfs4_stateid_copy(&state->open_stateid, stateid);
1516 static void __update_open_stateid(struct nfs4_state *state,
1517 const nfs4_stateid *open_stateid,
1518 const nfs4_stateid *deleg_stateid,
1520 nfs4_stateid *freeme)
1523 * Protect the call to nfs4_state_set_mode_locked and
1524 * serialise the stateid update
1526 spin_lock(&state->owner->so_lock);
1527 write_seqlock(&state->seqlock);
1528 if (deleg_stateid != NULL) {
1529 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1530 set_bit(NFS_DELEGATED_STATE, &state->flags);
1532 if (open_stateid != NULL)
1533 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1534 write_sequnlock(&state->seqlock);
1535 update_open_stateflags(state, fmode);
1536 spin_unlock(&state->owner->so_lock);
1539 static int update_open_stateid(struct nfs4_state *state,
1540 const nfs4_stateid *open_stateid,
1541 const nfs4_stateid *delegation,
1544 struct nfs_server *server = NFS_SERVER(state->inode);
1545 struct nfs_client *clp = server->nfs_client;
1546 struct nfs_inode *nfsi = NFS_I(state->inode);
1547 struct nfs_delegation *deleg_cur;
1548 nfs4_stateid freeme = { };
1551 fmode &= (FMODE_READ|FMODE_WRITE);
1554 deleg_cur = rcu_dereference(nfsi->delegation);
1555 if (deleg_cur == NULL)
1558 spin_lock(&deleg_cur->lock);
1559 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1560 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1561 (deleg_cur->type & fmode) != fmode)
1562 goto no_delegation_unlock;
1564 if (delegation == NULL)
1565 delegation = &deleg_cur->stateid;
1566 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1567 goto no_delegation_unlock;
1569 nfs_mark_delegation_referenced(deleg_cur);
1570 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1573 no_delegation_unlock:
1574 spin_unlock(&deleg_cur->lock);
1578 if (!ret && open_stateid != NULL) {
1579 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1582 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1583 nfs4_schedule_state_manager(clp);
1584 if (freeme.type != 0)
1585 nfs4_test_and_free_stateid(server, &freeme,
1586 state->owner->so_cred);
1591 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1592 const nfs4_stateid *stateid)
1594 struct nfs4_state *state = lsp->ls_state;
1597 spin_lock(&state->state_lock);
1598 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1600 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1602 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1605 spin_unlock(&state->state_lock);
1609 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1611 struct nfs_delegation *delegation;
1614 delegation = rcu_dereference(NFS_I(inode)->delegation);
1615 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1620 nfs4_inode_return_delegation(inode);
1623 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1625 struct nfs4_state *state = opendata->state;
1626 struct nfs_inode *nfsi = NFS_I(state->inode);
1627 struct nfs_delegation *delegation;
1628 int open_mode = opendata->o_arg.open_flags;
1629 fmode_t fmode = opendata->o_arg.fmode;
1630 enum open_claim_type4 claim = opendata->o_arg.claim;
1631 nfs4_stateid stateid;
1635 spin_lock(&state->owner->so_lock);
1636 if (can_open_cached(state, fmode, open_mode)) {
1637 update_open_stateflags(state, fmode);
1638 spin_unlock(&state->owner->so_lock);
1639 goto out_return_state;
1641 spin_unlock(&state->owner->so_lock);
1643 delegation = rcu_dereference(nfsi->delegation);
1644 if (!can_open_delegated(delegation, fmode, claim)) {
1648 /* Save the delegation */
1649 nfs4_stateid_copy(&stateid, &delegation->stateid);
1651 nfs_release_seqid(opendata->o_arg.seqid);
1652 if (!opendata->is_recover) {
1653 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1659 /* Try to update the stateid using the delegation */
1660 if (update_open_stateid(state, NULL, &stateid, fmode))
1661 goto out_return_state;
1664 return ERR_PTR(ret);
1666 atomic_inc(&state->count);
1671 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1673 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1674 struct nfs_delegation *delegation;
1675 int delegation_flags = 0;
1678 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1680 delegation_flags = delegation->flags;
1682 switch (data->o_arg.claim) {
1685 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1686 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1687 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1688 "returning a delegation for "
1689 "OPEN(CLAIM_DELEGATE_CUR)\n",
1693 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1694 nfs_inode_set_delegation(state->inode,
1695 data->owner->so_cred,
1698 nfs_inode_reclaim_delegation(state->inode,
1699 data->owner->so_cred,
1704 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1705 * and update the nfs4_state.
1707 static struct nfs4_state *
1708 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1710 struct inode *inode = data->state->inode;
1711 struct nfs4_state *state = data->state;
1714 if (!data->rpc_done) {
1715 if (data->rpc_status) {
1716 ret = data->rpc_status;
1719 /* cached opens have already been processed */
1723 ret = nfs_refresh_inode(inode, &data->f_attr);
1727 if (data->o_res.delegation_type != 0)
1728 nfs4_opendata_check_deleg(data, state);
1730 update_open_stateid(state, &data->o_res.stateid, NULL,
1732 atomic_inc(&state->count);
1736 return ERR_PTR(ret);
1740 static struct nfs4_state *
1741 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1743 struct inode *inode;
1744 struct nfs4_state *state = NULL;
1747 if (!data->rpc_done) {
1748 state = nfs4_try_open_cached(data);
1749 trace_nfs4_cached_open(data->state);
1754 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1756 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1757 ret = PTR_ERR(inode);
1761 state = nfs4_get_open_state(inode, data->owner);
1764 if (data->o_res.delegation_type != 0)
1765 nfs4_opendata_check_deleg(data, state);
1766 update_open_stateid(state, &data->o_res.stateid, NULL,
1770 nfs_release_seqid(data->o_arg.seqid);
1775 return ERR_PTR(ret);
1778 static struct nfs4_state *
1779 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1781 struct nfs4_state *ret;
1783 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1784 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1786 ret = _nfs4_opendata_to_nfs4_state(data);
1787 nfs4_sequence_free_slot(&data->o_res.seq_res);
1791 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1793 struct nfs_inode *nfsi = NFS_I(state->inode);
1794 struct nfs_open_context *ctx;
1796 spin_lock(&state->inode->i_lock);
1797 list_for_each_entry(ctx, &nfsi->open_files, list) {
1798 if (ctx->state != state)
1800 get_nfs_open_context(ctx);
1801 spin_unlock(&state->inode->i_lock);
1804 spin_unlock(&state->inode->i_lock);
1805 return ERR_PTR(-ENOENT);
1808 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1809 struct nfs4_state *state, enum open_claim_type4 claim)
1811 struct nfs4_opendata *opendata;
1813 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1814 NULL, NULL, claim, GFP_NOFS);
1815 if (opendata == NULL)
1816 return ERR_PTR(-ENOMEM);
1817 opendata->state = state;
1818 atomic_inc(&state->count);
1822 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1825 struct nfs4_state *newstate;
1828 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1830 opendata->o_arg.open_flags = 0;
1831 opendata->o_arg.fmode = fmode;
1832 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1833 NFS_SB(opendata->dentry->d_sb),
1835 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1836 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1837 nfs4_init_opendata_res(opendata);
1838 ret = _nfs4_recover_proc_open(opendata);
1841 newstate = nfs4_opendata_to_nfs4_state(opendata);
1842 if (IS_ERR(newstate))
1843 return PTR_ERR(newstate);
1844 if (newstate != opendata->state)
1846 nfs4_close_state(newstate, fmode);
1850 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1854 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1855 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1856 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1857 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1858 /* memory barrier prior to reading state->n_* */
1859 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1860 clear_bit(NFS_OPEN_STATE, &state->flags);
1862 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1865 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1868 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1872 * We may have performed cached opens for all three recoveries.
1873 * Check if we need to update the current stateid.
1875 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1876 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1877 write_seqlock(&state->seqlock);
1878 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1879 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1880 write_sequnlock(&state->seqlock);
1887 * reclaim state on the server after a reboot.
1889 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1891 struct nfs_delegation *delegation;
1892 struct nfs4_opendata *opendata;
1893 fmode_t delegation_type = 0;
1896 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1897 NFS4_OPEN_CLAIM_PREVIOUS);
1898 if (IS_ERR(opendata))
1899 return PTR_ERR(opendata);
1901 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1902 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1903 delegation_type = delegation->type;
1905 opendata->o_arg.u.delegation_type = delegation_type;
1906 status = nfs4_open_recover(opendata, state);
1907 nfs4_opendata_put(opendata);
1911 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1913 struct nfs_server *server = NFS_SERVER(state->inode);
1914 struct nfs4_exception exception = { };
1917 err = _nfs4_do_open_reclaim(ctx, state);
1918 trace_nfs4_open_reclaim(ctx, 0, err);
1919 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1921 if (err != -NFS4ERR_DELAY)
1923 nfs4_handle_exception(server, err, &exception);
1924 } while (exception.retry);
1928 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1930 struct nfs_open_context *ctx;
1933 ctx = nfs4_state_find_open_context(state);
1936 ret = nfs4_do_open_reclaim(ctx, state);
1937 put_nfs_open_context(ctx);
1941 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1945 printk(KERN_ERR "NFS: %s: unhandled error "
1946 "%d.\n", __func__, err);
1952 case -NFS4ERR_BADSESSION:
1953 case -NFS4ERR_BADSLOT:
1954 case -NFS4ERR_BAD_HIGH_SLOT:
1955 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1956 case -NFS4ERR_DEADSESSION:
1957 set_bit(NFS_DELEGATED_STATE, &state->flags);
1958 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1960 case -NFS4ERR_STALE_CLIENTID:
1961 case -NFS4ERR_STALE_STATEID:
1962 set_bit(NFS_DELEGATED_STATE, &state->flags);
1963 /* Don't recall a delegation if it was lost */
1964 nfs4_schedule_lease_recovery(server->nfs_client);
1966 case -NFS4ERR_MOVED:
1967 nfs4_schedule_migration_recovery(server);
1969 case -NFS4ERR_LEASE_MOVED:
1970 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1972 case -NFS4ERR_DELEG_REVOKED:
1973 case -NFS4ERR_ADMIN_REVOKED:
1974 case -NFS4ERR_EXPIRED:
1975 case -NFS4ERR_BAD_STATEID:
1976 case -NFS4ERR_OPENMODE:
1977 nfs_inode_find_state_and_recover(state->inode,
1979 nfs4_schedule_stateid_recovery(server, state);
1981 case -NFS4ERR_DELAY:
1982 case -NFS4ERR_GRACE:
1983 set_bit(NFS_DELEGATED_STATE, &state->flags);
1987 case -NFS4ERR_DENIED:
1988 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1994 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1995 struct nfs4_state *state, const nfs4_stateid *stateid,
1998 struct nfs_server *server = NFS_SERVER(state->inode);
1999 struct nfs4_opendata *opendata;
2002 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2003 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2004 if (IS_ERR(opendata))
2005 return PTR_ERR(opendata);
2006 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2007 write_seqlock(&state->seqlock);
2008 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2009 write_sequnlock(&state->seqlock);
2010 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2011 switch (type & (FMODE_READ|FMODE_WRITE)) {
2012 case FMODE_READ|FMODE_WRITE:
2014 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2017 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2021 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2023 nfs4_opendata_put(opendata);
2024 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2027 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2029 struct nfs4_opendata *data = calldata;
2031 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2032 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2035 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2037 struct nfs4_opendata *data = calldata;
2039 nfs40_sequence_done(task, &data->c_res.seq_res);
2041 data->rpc_status = task->tk_status;
2042 if (data->rpc_status == 0) {
2043 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2044 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2045 renew_lease(data->o_res.server, data->timestamp);
2050 static void nfs4_open_confirm_release(void *calldata)
2052 struct nfs4_opendata *data = calldata;
2053 struct nfs4_state *state = NULL;
2055 /* If this request hasn't been cancelled, do nothing */
2056 if (data->cancelled == 0)
2058 /* In case of error, no cleanup! */
2059 if (!data->rpc_done)
2061 state = nfs4_opendata_to_nfs4_state(data);
2063 nfs4_close_state(state, data->o_arg.fmode);
2065 nfs4_opendata_put(data);
2068 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2069 .rpc_call_prepare = nfs4_open_confirm_prepare,
2070 .rpc_call_done = nfs4_open_confirm_done,
2071 .rpc_release = nfs4_open_confirm_release,
2075 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2077 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2079 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2080 struct rpc_task *task;
2081 struct rpc_message msg = {
2082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2083 .rpc_argp = &data->c_arg,
2084 .rpc_resp = &data->c_res,
2085 .rpc_cred = data->owner->so_cred,
2087 struct rpc_task_setup task_setup_data = {
2088 .rpc_client = server->client,
2089 .rpc_message = &msg,
2090 .callback_ops = &nfs4_open_confirm_ops,
2091 .callback_data = data,
2092 .workqueue = nfsiod_workqueue,
2093 .flags = RPC_TASK_ASYNC,
2097 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2098 kref_get(&data->kref);
2100 data->rpc_status = 0;
2101 data->timestamp = jiffies;
2102 if (data->is_recover)
2103 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2104 task = rpc_run_task(&task_setup_data);
2106 return PTR_ERR(task);
2107 status = nfs4_wait_for_completion_rpc_task(task);
2109 data->cancelled = 1;
2112 status = data->rpc_status;
2117 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2119 struct nfs4_opendata *data = calldata;
2120 struct nfs4_state_owner *sp = data->owner;
2121 struct nfs_client *clp = sp->so_server->nfs_client;
2122 enum open_claim_type4 claim = data->o_arg.claim;
2124 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2127 * Check if we still need to send an OPEN call, or if we can use
2128 * a delegation instead.
2130 if (data->state != NULL) {
2131 struct nfs_delegation *delegation;
2133 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2136 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2137 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2138 goto unlock_no_action;
2141 /* Update client id. */
2142 data->o_arg.clientid = clp->cl_clientid;
2146 case NFS4_OPEN_CLAIM_PREVIOUS:
2147 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2148 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2149 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2150 case NFS4_OPEN_CLAIM_FH:
2151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2152 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2154 data->timestamp = jiffies;
2155 if (nfs4_setup_sequence(data->o_arg.server,
2156 &data->o_arg.seq_args,
2157 &data->o_res.seq_res,
2159 nfs_release_seqid(data->o_arg.seqid);
2161 /* Set the create mode (note dependency on the session type) */
2162 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2163 if (data->o_arg.open_flags & O_EXCL) {
2164 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2165 if (nfs4_has_persistent_session(clp))
2166 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2167 else if (clp->cl_mvops->minor_version > 0)
2168 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2172 trace_nfs4_cached_open(data->state);
2175 task->tk_action = NULL;
2177 nfs4_sequence_done(task, &data->o_res.seq_res);
2180 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2182 struct nfs4_opendata *data = calldata;
2184 data->rpc_status = task->tk_status;
2186 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2189 if (task->tk_status == 0) {
2190 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2191 switch (data->o_res.f_attr->mode & S_IFMT) {
2195 data->rpc_status = -ELOOP;
2198 data->rpc_status = -EISDIR;
2201 data->rpc_status = -ENOTDIR;
2204 renew_lease(data->o_res.server, data->timestamp);
2205 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2206 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2211 static void nfs4_open_release(void *calldata)
2213 struct nfs4_opendata *data = calldata;
2214 struct nfs4_state *state = NULL;
2216 /* If this request hasn't been cancelled, do nothing */
2217 if (data->cancelled == 0)
2219 /* In case of error, no cleanup! */
2220 if (data->rpc_status != 0 || !data->rpc_done)
2222 /* In case we need an open_confirm, no cleanup! */
2223 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2225 state = nfs4_opendata_to_nfs4_state(data);
2227 nfs4_close_state(state, data->o_arg.fmode);
2229 nfs4_opendata_put(data);
2232 static const struct rpc_call_ops nfs4_open_ops = {
2233 .rpc_call_prepare = nfs4_open_prepare,
2234 .rpc_call_done = nfs4_open_done,
2235 .rpc_release = nfs4_open_release,
2238 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2240 struct inode *dir = d_inode(data->dir);
2241 struct nfs_server *server = NFS_SERVER(dir);
2242 struct nfs_openargs *o_arg = &data->o_arg;
2243 struct nfs_openres *o_res = &data->o_res;
2244 struct rpc_task *task;
2245 struct rpc_message msg = {
2246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2249 .rpc_cred = data->owner->so_cred,
2251 struct rpc_task_setup task_setup_data = {
2252 .rpc_client = server->client,
2253 .rpc_message = &msg,
2254 .callback_ops = &nfs4_open_ops,
2255 .callback_data = data,
2256 .workqueue = nfsiod_workqueue,
2257 .flags = RPC_TASK_ASYNC,
2261 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2262 kref_get(&data->kref);
2264 data->rpc_status = 0;
2265 data->cancelled = 0;
2266 data->is_recover = 0;
2268 nfs4_set_sequence_privileged(&o_arg->seq_args);
2269 data->is_recover = 1;
2271 task = rpc_run_task(&task_setup_data);
2273 return PTR_ERR(task);
2274 status = nfs4_wait_for_completion_rpc_task(task);
2276 data->cancelled = 1;
2279 status = data->rpc_status;
2285 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2287 struct inode *dir = d_inode(data->dir);
2288 struct nfs_openres *o_res = &data->o_res;
2291 status = nfs4_run_open_task(data, 1);
2292 if (status != 0 || !data->rpc_done)
2295 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2297 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2298 status = _nfs4_proc_open_confirm(data);
2307 * Additional permission checks in order to distinguish between an
2308 * open for read, and an open for execute. This works around the
2309 * fact that NFSv4 OPEN treats read and execute permissions as being
2311 * Note that in the non-execute case, we want to turn off permission
2312 * checking if we just created a new file (POSIX open() semantics).
2314 static int nfs4_opendata_access(struct rpc_cred *cred,
2315 struct nfs4_opendata *opendata,
2316 struct nfs4_state *state, fmode_t fmode,
2319 struct nfs_access_entry cache;
2322 /* access call failed or for some reason the server doesn't
2323 * support any access modes -- defer access call until later */
2324 if (opendata->o_res.access_supported == 0)
2329 * Use openflags to check for exec, because fmode won't
2330 * always have FMODE_EXEC set when file open for exec.
2332 if (openflags & __FMODE_EXEC) {
2333 /* ONLY check for exec rights */
2335 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2339 cache.jiffies = jiffies;
2340 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2341 nfs_access_add_cache(state->inode, &cache);
2343 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2346 /* even though OPEN succeeded, access is denied. Close the file */
2347 nfs4_close_state(state, fmode);
2352 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2354 static int _nfs4_proc_open(struct nfs4_opendata *data)
2356 struct inode *dir = d_inode(data->dir);
2357 struct nfs_server *server = NFS_SERVER(dir);
2358 struct nfs_openargs *o_arg = &data->o_arg;
2359 struct nfs_openres *o_res = &data->o_res;
2362 status = nfs4_run_open_task(data, 0);
2363 if (!data->rpc_done)
2366 if (status == -NFS4ERR_BADNAME &&
2367 !(o_arg->open_flags & O_CREAT))
2372 nfs_fattr_map_and_free_names(server, &data->f_attr);
2374 if (o_arg->open_flags & O_CREAT) {
2375 update_changeattr(dir, &o_res->cinfo);
2376 if (o_arg->open_flags & O_EXCL)
2377 data->file_created = 1;
2378 else if (o_res->cinfo.before != o_res->cinfo.after)
2379 data->file_created = 1;
2381 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2382 server->caps &= ~NFS_CAP_POSIX_LOCK;
2383 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2384 status = _nfs4_proc_open_confirm(data);
2388 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2389 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2393 static int nfs4_recover_expired_lease(struct nfs_server *server)
2395 return nfs4_client_recover_expired_lease(server->nfs_client);
2400 * reclaim state on the server after a network partition.
2401 * Assumes caller holds the appropriate lock
2403 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2405 struct nfs4_opendata *opendata;
2408 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2409 NFS4_OPEN_CLAIM_FH);
2410 if (IS_ERR(opendata))
2411 return PTR_ERR(opendata);
2412 ret = nfs4_open_recover(opendata, state);
2414 d_drop(ctx->dentry);
2415 nfs4_opendata_put(opendata);
2419 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2421 struct nfs_server *server = NFS_SERVER(state->inode);
2422 struct nfs4_exception exception = { };
2426 err = _nfs4_open_expired(ctx, state);
2427 trace_nfs4_open_expired(ctx, 0, err);
2428 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2433 case -NFS4ERR_GRACE:
2434 case -NFS4ERR_DELAY:
2435 nfs4_handle_exception(server, err, &exception);
2438 } while (exception.retry);
2443 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2445 struct nfs_open_context *ctx;
2448 ctx = nfs4_state_find_open_context(state);
2451 ret = nfs4_do_open_expired(ctx, state);
2452 put_nfs_open_context(ctx);
2456 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2457 const nfs4_stateid *stateid)
2459 nfs_remove_bad_delegation(state->inode, stateid);
2460 write_seqlock(&state->seqlock);
2461 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2462 write_sequnlock(&state->seqlock);
2463 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2466 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2468 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2469 nfs_finish_clear_delegation_stateid(state, NULL);
2472 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2474 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2475 nfs40_clear_delegation_stateid(state);
2476 return nfs4_open_expired(sp, state);
2479 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2480 nfs4_stateid *stateid,
2481 struct rpc_cred *cred)
2483 return -NFS4ERR_BAD_STATEID;
2486 #if defined(CONFIG_NFS_V4_1)
2487 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2488 nfs4_stateid *stateid,
2489 struct rpc_cred *cred)
2493 switch (stateid->type) {
2496 case NFS4_INVALID_STATEID_TYPE:
2497 case NFS4_SPECIAL_STATEID_TYPE:
2498 return -NFS4ERR_BAD_STATEID;
2499 case NFS4_REVOKED_STATEID_TYPE:
2503 status = nfs41_test_stateid(server, stateid, cred);
2505 case -NFS4ERR_EXPIRED:
2506 case -NFS4ERR_ADMIN_REVOKED:
2507 case -NFS4ERR_DELEG_REVOKED:
2513 /* Ack the revoked state to the server */
2514 nfs41_free_stateid(server, stateid, cred, true);
2515 return -NFS4ERR_EXPIRED;
2518 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2520 struct nfs_server *server = NFS_SERVER(state->inode);
2521 nfs4_stateid stateid;
2522 struct nfs_delegation *delegation;
2523 struct rpc_cred *cred;
2526 /* Get the delegation credential for use by test/free_stateid */
2528 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2529 if (delegation == NULL) {
2534 nfs4_stateid_copy(&stateid, &delegation->stateid);
2535 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2537 nfs_finish_clear_delegation_stateid(state, &stateid);
2541 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2546 cred = get_rpccred(delegation->cred);
2548 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2549 trace_nfs4_test_delegation_stateid(state, NULL, status);
2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2551 nfs_finish_clear_delegation_stateid(state, &stateid);
2557 * nfs41_check_expired_locks - possibly free a lock stateid
2559 * @state: NFSv4 state for an inode
2561 * Returns NFS_OK if recovery for this stateid is now finished.
2562 * Otherwise a negative NFS4ERR value is returned.
2564 static int nfs41_check_expired_locks(struct nfs4_state *state)
2566 int status, ret = NFS_OK;
2567 struct nfs4_lock_state *lsp, *prev = NULL;
2568 struct nfs_server *server = NFS_SERVER(state->inode);
2570 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2573 spin_lock(&state->state_lock);
2574 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2575 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2576 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2578 atomic_inc(&lsp->ls_count);
2579 spin_unlock(&state->state_lock);
2581 nfs4_put_lock_state(prev);
2584 status = nfs41_test_and_free_expired_stateid(server,
2587 trace_nfs4_test_lock_stateid(state, lsp, status);
2588 if (status == -NFS4ERR_EXPIRED ||
2589 status == -NFS4ERR_BAD_STATEID) {
2590 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2591 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2592 if (!recover_lost_locks)
2593 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2594 } else if (status != NFS_OK) {
2596 nfs4_put_lock_state(prev);
2599 spin_lock(&state->state_lock);
2602 spin_unlock(&state->state_lock);
2603 nfs4_put_lock_state(prev);
2609 * nfs41_check_open_stateid - possibly free an open stateid
2611 * @state: NFSv4 state for an inode
2613 * Returns NFS_OK if recovery for this stateid is now finished.
2614 * Otherwise a negative NFS4ERR value is returned.
2616 static int nfs41_check_open_stateid(struct nfs4_state *state)
2618 struct nfs_server *server = NFS_SERVER(state->inode);
2619 nfs4_stateid *stateid = &state->open_stateid;
2620 struct rpc_cred *cred = state->owner->so_cred;
2623 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2625 if (nfs4_have_delegation(state->inode, state->state))
2627 return -NFS4ERR_OPENMODE;
2629 return -NFS4ERR_BAD_STATEID;
2631 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2632 trace_nfs4_test_open_stateid(state, NULL, status);
2633 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2634 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2635 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2636 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2637 clear_bit(NFS_OPEN_STATE, &state->flags);
2638 stateid->type = NFS4_INVALID_STATEID_TYPE;
2640 if (status != NFS_OK)
2642 if (nfs_open_stateid_recover_openmode(state))
2643 return -NFS4ERR_OPENMODE;
2647 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2651 nfs41_check_delegation_stateid(state);
2652 status = nfs41_check_expired_locks(state);
2653 if (status != NFS_OK)
2655 status = nfs41_check_open_stateid(state);
2656 if (status != NFS_OK)
2657 status = nfs4_open_expired(sp, state);
2663 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2664 * fields corresponding to attributes that were used to store the verifier.
2665 * Make sure we clobber those fields in the later setattr call
2667 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2668 struct iattr *sattr, struct nfs4_label **label)
2670 const u32 *attrset = opendata->o_res.attrset;
2672 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2673 !(sattr->ia_valid & ATTR_ATIME_SET))
2674 sattr->ia_valid |= ATTR_ATIME;
2676 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2677 !(sattr->ia_valid & ATTR_MTIME_SET))
2678 sattr->ia_valid |= ATTR_MTIME;
2680 /* Except MODE, it seems harmless of setting twice. */
2681 if ((attrset[1] & FATTR4_WORD1_MODE))
2682 sattr->ia_valid &= ~ATTR_MODE;
2684 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2688 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2691 struct nfs_open_context *ctx)
2693 struct nfs4_state_owner *sp = opendata->owner;
2694 struct nfs_server *server = sp->so_server;
2695 struct dentry *dentry;
2696 struct nfs4_state *state;
2700 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2702 ret = _nfs4_proc_open(opendata);
2706 state = nfs4_opendata_to_nfs4_state(opendata);
2707 ret = PTR_ERR(state);
2710 if (server->caps & NFS_CAP_POSIX_LOCK)
2711 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2712 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2713 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2715 dentry = opendata->dentry;
2716 if (d_really_is_negative(dentry)) {
2717 struct dentry *alias;
2719 alias = d_exact_alias(dentry, state->inode);
2721 alias = d_splice_alias(igrab(state->inode), dentry);
2722 /* d_splice_alias() can't fail here - it's a non-directory */
2725 ctx->dentry = dentry = alias;
2727 nfs_set_verifier(dentry,
2728 nfs_save_change_attribute(d_inode(opendata->dir)));
2731 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2736 if (d_inode(dentry) == state->inode) {
2737 nfs_inode_attach_open_context(ctx);
2738 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2739 nfs4_schedule_stateid_recovery(server, state);
2746 * Returns a referenced nfs4_state
2748 static int _nfs4_do_open(struct inode *dir,
2749 struct nfs_open_context *ctx,
2751 struct iattr *sattr,
2752 struct nfs4_label *label,
2755 struct nfs4_state_owner *sp;
2756 struct nfs4_state *state = NULL;
2757 struct nfs_server *server = NFS_SERVER(dir);
2758 struct nfs4_opendata *opendata;
2759 struct dentry *dentry = ctx->dentry;
2760 struct rpc_cred *cred = ctx->cred;
2761 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2762 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2763 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2764 struct nfs4_label *olabel = NULL;
2767 /* Protect against reboot recovery conflicts */
2769 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2771 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2774 status = nfs4_recover_expired_lease(server);
2776 goto err_put_state_owner;
2777 if (d_really_is_positive(dentry))
2778 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2780 if (d_really_is_positive(dentry))
2781 claim = NFS4_OPEN_CLAIM_FH;
2782 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2783 label, claim, GFP_KERNEL);
2784 if (opendata == NULL)
2785 goto err_put_state_owner;
2788 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2789 if (IS_ERR(olabel)) {
2790 status = PTR_ERR(olabel);
2791 goto err_opendata_put;
2795 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2796 if (!opendata->f_attr.mdsthreshold) {
2797 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2798 if (!opendata->f_attr.mdsthreshold)
2799 goto err_free_label;
2801 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2803 if (d_really_is_positive(dentry))
2804 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2806 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2808 goto err_free_label;
2811 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2812 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2813 nfs4_exclusive_attrset(opendata, sattr, &label);
2815 * send create attributes which was not set by open
2816 * with an extra setattr.
2818 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2819 nfs_fattr_init(opendata->o_res.f_attr);
2820 status = nfs4_do_setattr(state->inode, cred,
2821 opendata->o_res.f_attr, sattr,
2822 state, label, olabel);
2824 nfs_setattr_update_inode(state->inode, sattr,
2825 opendata->o_res.f_attr);
2826 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2830 if (opened && opendata->file_created)
2831 *opened |= FILE_CREATED;
2833 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2834 *ctx_th = opendata->f_attr.mdsthreshold;
2835 opendata->f_attr.mdsthreshold = NULL;
2838 nfs4_label_free(olabel);
2840 nfs4_opendata_put(opendata);
2841 nfs4_put_state_owner(sp);
2844 nfs4_label_free(olabel);
2846 nfs4_opendata_put(opendata);
2847 err_put_state_owner:
2848 nfs4_put_state_owner(sp);
2854 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2855 struct nfs_open_context *ctx,
2857 struct iattr *sattr,
2858 struct nfs4_label *label,
2861 struct nfs_server *server = NFS_SERVER(dir);
2862 struct nfs4_exception exception = { };
2863 struct nfs4_state *res;
2867 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2869 trace_nfs4_open_file(ctx, flags, status);
2872 /* NOTE: BAD_SEQID means the server and client disagree about the
2873 * book-keeping w.r.t. state-changing operations
2874 * (OPEN/CLOSE/LOCK/LOCKU...)
2875 * It is actually a sign of a bug on the client or on the server.
2877 * If we receive a BAD_SEQID error in the particular case of
2878 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2879 * have unhashed the old state_owner for us, and that we can
2880 * therefore safely retry using a new one. We should still warn
2881 * the user though...
2883 if (status == -NFS4ERR_BAD_SEQID) {
2884 pr_warn_ratelimited("NFS: v4 server %s "
2885 " returned a bad sequence-id error!\n",
2886 NFS_SERVER(dir)->nfs_client->cl_hostname);
2887 exception.retry = 1;
2891 * BAD_STATEID on OPEN means that the server cancelled our
2892 * state before it received the OPEN_CONFIRM.
2893 * Recover by retrying the request as per the discussion
2894 * on Page 181 of RFC3530.
2896 if (status == -NFS4ERR_BAD_STATEID) {
2897 exception.retry = 1;
2900 if (status == -EAGAIN) {
2901 /* We must have found a delegation */
2902 exception.retry = 1;
2905 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2907 res = ERR_PTR(nfs4_handle_exception(server,
2908 status, &exception));
2909 } while (exception.retry);
2913 static int _nfs4_do_setattr(struct inode *inode,
2914 struct nfs_setattrargs *arg,
2915 struct nfs_setattrres *res,
2916 struct rpc_cred *cred,
2917 struct nfs4_state *state)
2919 struct nfs_server *server = NFS_SERVER(inode);
2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2926 struct rpc_cred *delegation_cred = NULL;
2927 unsigned long timestamp = jiffies;
2932 nfs_fattr_init(res->fattr);
2934 /* Servers should only apply open mode checks for file size changes */
2935 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2936 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2938 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2939 /* Use that stateid */
2940 } else if (truncate && state != NULL) {
2941 struct nfs_lockowner lockowner = {
2942 .l_owner = current->files,
2943 .l_pid = current->tgid,
2945 if (!nfs4_valid_open_stateid(state))
2947 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner,
2948 &arg->stateid, &delegation_cred) == -EIO)
2951 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2952 if (delegation_cred)
2953 msg.rpc_cred = delegation_cred;
2955 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2957 put_rpccred(delegation_cred);
2958 if (status == 0 && state != NULL)
2959 renew_lease(server, timestamp);
2960 trace_nfs4_setattr(inode, &arg->stateid, status);
2964 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2965 struct nfs_fattr *fattr, struct iattr *sattr,
2966 struct nfs4_state *state, struct nfs4_label *ilabel,
2967 struct nfs4_label *olabel)
2969 struct nfs_server *server = NFS_SERVER(inode);
2970 struct nfs_setattrargs arg = {
2971 .fh = NFS_FH(inode),
2974 .bitmask = server->attr_bitmask,
2977 struct nfs_setattrres res = {
2982 struct nfs4_exception exception = {
2985 .stateid = &arg.stateid,
2989 arg.bitmask = nfs4_bitmask(server, ilabel);
2991 arg.bitmask = nfs4_bitmask(server, olabel);
2994 err = _nfs4_do_setattr(inode, &arg, &res, cred, state);
2996 case -NFS4ERR_OPENMODE:
2997 if (!(sattr->ia_valid & ATTR_SIZE)) {
2998 pr_warn_once("NFSv4: server %s is incorrectly "
2999 "applying open mode checks to "
3000 "a SETATTR that is not "
3001 "changing file size.\n",
3002 server->nfs_client->cl_hostname);
3004 if (state && !(state->state & FMODE_WRITE)) {
3006 if (sattr->ia_valid & ATTR_OPEN)
3011 err = nfs4_handle_exception(server, err, &exception);
3012 } while (exception.retry);
3018 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3020 if (inode == NULL || !nfs_have_layout(inode))
3023 return pnfs_wait_on_layoutreturn(inode, task);
3026 struct nfs4_closedata {
3027 struct inode *inode;
3028 struct nfs4_state *state;
3029 struct nfs_closeargs arg;
3030 struct nfs_closeres res;
3031 struct nfs_fattr fattr;
3032 unsigned long timestamp;
3037 static void nfs4_free_closedata(void *data)
3039 struct nfs4_closedata *calldata = data;
3040 struct nfs4_state_owner *sp = calldata->state->owner;
3041 struct super_block *sb = calldata->state->inode->i_sb;
3044 pnfs_roc_release(calldata->state->inode);
3045 nfs4_put_open_state(calldata->state);
3046 nfs_free_seqid(calldata->arg.seqid);
3047 nfs4_put_state_owner(sp);
3048 nfs_sb_deactive(sb);
3052 static void nfs4_close_done(struct rpc_task *task, void *data)
3054 struct nfs4_closedata *calldata = data;
3055 struct nfs4_state *state = calldata->state;
3056 struct nfs_server *server = NFS_SERVER(calldata->inode);
3057 nfs4_stateid *res_stateid = NULL;
3059 dprintk("%s: begin!\n", __func__);
3060 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3062 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3063 /* hmm. we are done with the inode, and in the process of freeing
3064 * the state_owner. we keep this around to process errors
3066 switch (task->tk_status) {
3068 res_stateid = &calldata->res.stateid;
3070 pnfs_roc_set_barrier(state->inode,
3071 calldata->roc_barrier);
3072 renew_lease(server, calldata->timestamp);
3074 case -NFS4ERR_ADMIN_REVOKED:
3075 case -NFS4ERR_STALE_STATEID:
3076 case -NFS4ERR_EXPIRED:
3077 nfs4_free_revoked_stateid(server,
3078 &calldata->arg.stateid,
3079 task->tk_msg.rpc_cred);
3080 case -NFS4ERR_OLD_STATEID:
3081 case -NFS4ERR_BAD_STATEID:
3082 if (!nfs4_stateid_match(&calldata->arg.stateid,
3083 &state->open_stateid)) {
3084 rpc_restart_call_prepare(task);
3087 if (calldata->arg.fmode == 0)
3090 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3091 rpc_restart_call_prepare(task);
3095 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3096 res_stateid, calldata->arg.fmode);
3098 nfs_release_seqid(calldata->arg.seqid);
3099 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
3100 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3103 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3105 struct nfs4_closedata *calldata = data;
3106 struct nfs4_state *state = calldata->state;
3107 struct inode *inode = calldata->inode;
3108 bool is_rdonly, is_wronly, is_rdwr;
3111 dprintk("%s: begin!\n", __func__);
3112 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3115 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3116 spin_lock(&state->owner->so_lock);
3117 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3118 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3119 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3120 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3121 /* Calculate the change in open mode */
3122 calldata->arg.fmode = 0;
3123 if (state->n_rdwr == 0) {
3124 if (state->n_rdonly == 0)
3125 call_close |= is_rdonly;
3127 calldata->arg.fmode |= FMODE_READ;
3128 if (state->n_wronly == 0)
3129 call_close |= is_wronly;
3131 calldata->arg.fmode |= FMODE_WRITE;
3132 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3133 call_close |= is_rdwr;
3135 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3137 if (!nfs4_valid_open_stateid(state) ||
3138 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3140 spin_unlock(&state->owner->so_lock);
3143 /* Note: exit _without_ calling nfs4_close_done */
3147 if (nfs4_wait_on_layoutreturn(inode, task)) {
3148 nfs_release_seqid(calldata->arg.seqid);
3152 if (calldata->arg.fmode == 0)
3153 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3155 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
3157 calldata->arg.share_access =
3158 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3159 calldata->arg.fmode, 0);
3161 nfs_fattr_init(calldata->res.fattr);
3162 calldata->timestamp = jiffies;
3163 if (nfs4_setup_sequence(NFS_SERVER(inode),
3164 &calldata->arg.seq_args,
3165 &calldata->res.seq_res,
3167 nfs_release_seqid(calldata->arg.seqid);
3168 dprintk("%s: done!\n", __func__);
3171 task->tk_action = NULL;
3173 nfs4_sequence_done(task, &calldata->res.seq_res);
3176 static const struct rpc_call_ops nfs4_close_ops = {
3177 .rpc_call_prepare = nfs4_close_prepare,
3178 .rpc_call_done = nfs4_close_done,
3179 .rpc_release = nfs4_free_closedata,
3182 static bool nfs4_roc(struct inode *inode)
3184 if (!nfs_have_layout(inode))
3186 return pnfs_roc(inode);
3190 * It is possible for data to be read/written from a mem-mapped file
3191 * after the sys_close call (which hits the vfs layer as a flush).
3192 * This means that we can't safely call nfsv4 close on a file until
3193 * the inode is cleared. This in turn means that we are not good
3194 * NFSv4 citizens - we do not indicate to the server to update the file's
3195 * share state even when we are done with one of the three share
3196 * stateid's in the inode.
3198 * NOTE: Caller must be holding the sp->so_owner semaphore!
3200 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3202 struct nfs_server *server = NFS_SERVER(state->inode);
3203 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3204 struct nfs4_closedata *calldata;
3205 struct nfs4_state_owner *sp = state->owner;
3206 struct rpc_task *task;
3207 struct rpc_message msg = {
3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3209 .rpc_cred = state->owner->so_cred,
3211 struct rpc_task_setup task_setup_data = {
3212 .rpc_client = server->client,
3213 .rpc_message = &msg,
3214 .callback_ops = &nfs4_close_ops,
3215 .workqueue = nfsiod_workqueue,
3216 .flags = RPC_TASK_ASYNC,
3218 int status = -ENOMEM;
3220 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3221 &task_setup_data.rpc_client, &msg);
3223 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3224 if (calldata == NULL)
3226 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3227 calldata->inode = state->inode;
3228 calldata->state = state;
3229 calldata->arg.fh = NFS_FH(state->inode);
3230 /* Serialization for the sequence id */
3231 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3232 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3233 if (IS_ERR(calldata->arg.seqid))
3234 goto out_free_calldata;
3235 calldata->arg.fmode = 0;
3236 calldata->arg.bitmask = server->cache_consistency_bitmask;
3237 calldata->res.fattr = &calldata->fattr;
3238 calldata->res.seqid = calldata->arg.seqid;
3239 calldata->res.server = server;
3240 calldata->roc = nfs4_roc(state->inode);
3241 nfs_sb_active(calldata->inode->i_sb);
3243 msg.rpc_argp = &calldata->arg;
3244 msg.rpc_resp = &calldata->res;
3245 task_setup_data.callback_data = calldata;
3246 task = rpc_run_task(&task_setup_data);
3248 return PTR_ERR(task);
3251 status = rpc_wait_for_completion_task(task);
3257 nfs4_put_open_state(state);
3258 nfs4_put_state_owner(sp);
3262 static struct inode *
3263 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3264 int open_flags, struct iattr *attr, int *opened)
3266 struct nfs4_state *state;
3267 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3269 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3271 /* Protect against concurrent sillydeletes */
3272 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3274 nfs4_label_release_security(label);
3277 return ERR_CAST(state);
3278 return state->inode;
3281 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3283 if (ctx->state == NULL)
3286 nfs4_close_sync(ctx->state, ctx->mode);
3288 nfs4_close_state(ctx->state, ctx->mode);
3291 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3292 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3293 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
3295 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3297 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3298 struct nfs4_server_caps_arg args = {
3302 struct nfs4_server_caps_res res = {};
3303 struct rpc_message msg = {
3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3310 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3311 FATTR4_WORD0_FH_EXPIRE_TYPE |
3312 FATTR4_WORD0_LINK_SUPPORT |
3313 FATTR4_WORD0_SYMLINK_SUPPORT |
3314 FATTR4_WORD0_ACLSUPPORT;
3316 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3318 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3320 /* Sanity check the server answers */
3321 switch (minorversion) {
3323 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3324 res.attr_bitmask[2] = 0;
3327 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3330 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3332 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3333 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3334 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3335 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3336 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3337 NFS_CAP_CTIME|NFS_CAP_MTIME|
3338 NFS_CAP_SECURITY_LABEL);
3339 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3340 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3341 server->caps |= NFS_CAP_ACLS;
3342 if (res.has_links != 0)
3343 server->caps |= NFS_CAP_HARDLINKS;
3344 if (res.has_symlinks != 0)
3345 server->caps |= NFS_CAP_SYMLINKS;
3346 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3347 server->caps |= NFS_CAP_FILEID;
3348 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3349 server->caps |= NFS_CAP_MODE;
3350 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3351 server->caps |= NFS_CAP_NLINK;
3352 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3353 server->caps |= NFS_CAP_OWNER;
3354 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3355 server->caps |= NFS_CAP_OWNER_GROUP;
3356 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3357 server->caps |= NFS_CAP_ATIME;
3358 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3359 server->caps |= NFS_CAP_CTIME;
3360 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3361 server->caps |= NFS_CAP_MTIME;
3362 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3363 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3364 server->caps |= NFS_CAP_SECURITY_LABEL;
3366 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3367 sizeof(server->attr_bitmask));
3368 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3370 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3371 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3372 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3373 server->cache_consistency_bitmask[2] = 0;
3374 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3375 sizeof(server->exclcreat_bitmask));
3376 server->acl_bitmask = res.acl_bitmask;
3377 server->fh_expire_type = res.fh_expire_type;
3383 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3385 struct nfs4_exception exception = { };
3388 err = nfs4_handle_exception(server,
3389 _nfs4_server_capabilities(server, fhandle),
3391 } while (exception.retry);
3395 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3396 struct nfs_fsinfo *info)
3399 struct nfs4_lookup_root_arg args = {
3402 struct nfs4_lookup_res res = {
3404 .fattr = info->fattr,
3407 struct rpc_message msg = {
3408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3413 bitmask[0] = nfs4_fattr_bitmap[0];
3414 bitmask[1] = nfs4_fattr_bitmap[1];
3416 * Process the label in the upcoming getfattr
3418 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3420 nfs_fattr_init(info->fattr);
3421 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3424 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3425 struct nfs_fsinfo *info)
3427 struct nfs4_exception exception = { };
3430 err = _nfs4_lookup_root(server, fhandle, info);
3431 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3434 case -NFS4ERR_WRONGSEC:
3437 err = nfs4_handle_exception(server, err, &exception);
3439 } while (exception.retry);
3444 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3445 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3447 struct rpc_auth_create_args auth_args = {
3448 .pseudoflavor = flavor,
3450 struct rpc_auth *auth;
3453 auth = rpcauth_create(&auth_args, server->client);
3458 ret = nfs4_lookup_root(server, fhandle, info);
3464 * Retry pseudoroot lookup with various security flavors. We do this when:
3466 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3467 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3469 * Returns zero on success, or a negative NFS4ERR value, or a
3470 * negative errno value.
3472 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3473 struct nfs_fsinfo *info)
3475 /* Per 3530bis 15.33.5 */
3476 static const rpc_authflavor_t flav_array[] = {
3480 RPC_AUTH_UNIX, /* courtesy */
3483 int status = -EPERM;
3486 if (server->auth_info.flavor_len > 0) {
3487 /* try each flavor specified by user */
3488 for (i = 0; i < server->auth_info.flavor_len; i++) {
3489 status = nfs4_lookup_root_sec(server, fhandle, info,
3490 server->auth_info.flavors[i]);
3491 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3496 /* no flavors specified by user, try default list */
3497 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3498 status = nfs4_lookup_root_sec(server, fhandle, info,
3500 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3507 * -EACCESS could mean that the user doesn't have correct permissions
3508 * to access the mount. It could also mean that we tried to mount
3509 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3510 * existing mount programs don't handle -EACCES very well so it should
3511 * be mapped to -EPERM instead.
3513 if (status == -EACCES)
3519 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3520 * @server: initialized nfs_server handle
3521 * @fhandle: we fill in the pseudo-fs root file handle
3522 * @info: we fill in an FSINFO struct
3523 * @auth_probe: probe the auth flavours
3525 * Returns zero on success, or a negative errno.
3527 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3528 struct nfs_fsinfo *info,
3534 status = nfs4_lookup_root(server, fhandle, info);
3536 if (auth_probe || status == NFS4ERR_WRONGSEC)
3537 status = server->nfs_client->cl_mvops->find_root_sec(server,
3541 status = nfs4_server_capabilities(server, fhandle);
3543 status = nfs4_do_fsinfo(server, fhandle, info);
3545 return nfs4_map_errors(status);
3548 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3549 struct nfs_fsinfo *info)
3552 struct nfs_fattr *fattr = info->fattr;
3553 struct nfs4_label *label = NULL;
3555 error = nfs4_server_capabilities(server, mntfh);
3557 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3561 label = nfs4_label_alloc(server, GFP_KERNEL);
3563 return PTR_ERR(label);
3565 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3567 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3568 goto err_free_label;
3571 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3572 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3573 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3576 nfs4_label_free(label);
3582 * Get locations and (maybe) other attributes of a referral.
3583 * Note that we'll actually follow the referral later when
3584 * we detect fsid mismatch in inode revalidation
3586 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3587 const struct qstr *name, struct nfs_fattr *fattr,
3588 struct nfs_fh *fhandle)
3590 int status = -ENOMEM;
3591 struct page *page = NULL;
3592 struct nfs4_fs_locations *locations = NULL;
3594 page = alloc_page(GFP_KERNEL);
3597 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3598 if (locations == NULL)
3601 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3606 * If the fsid didn't change, this is a migration event, not a
3607 * referral. Cause us to drop into the exception handler, which
3608 * will kick off migration recovery.
3610 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3611 dprintk("%s: server did not return a different fsid for"
3612 " a referral at %s\n", __func__, name->name);
3613 status = -NFS4ERR_MOVED;
3616 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3617 nfs_fixup_referral_attributes(&locations->fattr);
3619 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3620 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3621 memset(fhandle, 0, sizeof(struct nfs_fh));
3629 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3630 struct nfs_fattr *fattr, struct nfs4_label *label)
3632 struct nfs4_getattr_arg args = {
3634 .bitmask = server->attr_bitmask,
3636 struct nfs4_getattr_res res = {
3641 struct rpc_message msg = {
3642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3647 args.bitmask = nfs4_bitmask(server, label);
3649 nfs_fattr_init(fattr);
3650 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3653 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3654 struct nfs_fattr *fattr, struct nfs4_label *label)
3656 struct nfs4_exception exception = { };
3659 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3660 trace_nfs4_getattr(server, fhandle, fattr, err);
3661 err = nfs4_handle_exception(server, err,
3663 } while (exception.retry);
3668 * The file is not closed if it is opened due to the a request to change
3669 * the size of the file. The open call will not be needed once the
3670 * VFS layer lookup-intents are implemented.
3672 * Close is called when the inode is destroyed.
3673 * If we haven't opened the file for O_WRONLY, we
3674 * need to in the size_change case to obtain a stateid.
3677 * Because OPEN is always done by name in nfsv4, it is
3678 * possible that we opened a different file by the same
3679 * name. We can recognize this race condition, but we
3680 * can't do anything about it besides returning an error.
3682 * This will be fixed with VFS changes (lookup-intent).
3685 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3686 struct iattr *sattr)
3688 struct inode *inode = d_inode(dentry);
3689 struct rpc_cred *cred = NULL;
3690 struct nfs4_state *state = NULL;
3691 struct nfs4_label *label = NULL;
3694 if (pnfs_ld_layoutret_on_setattr(inode) &&
3695 sattr->ia_valid & ATTR_SIZE &&
3696 sattr->ia_size < i_size_read(inode))
3697 pnfs_commit_and_return_layout(inode);
3699 nfs_fattr_init(fattr);
3701 /* Deal with open(O_TRUNC) */
3702 if (sattr->ia_valid & ATTR_OPEN)
3703 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3705 /* Optimization: if the end result is no change, don't RPC */
3706 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3709 /* Search for an existing open(O_WRITE) file */
3710 if (sattr->ia_valid & ATTR_FILE) {
3711 struct nfs_open_context *ctx;
3713 ctx = nfs_file_open_context(sattr->ia_file);
3720 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3722 return PTR_ERR(label);
3724 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3726 nfs_setattr_update_inode(inode, sattr, fattr);
3727 nfs_setsecurity(inode, fattr, label);
3729 nfs4_label_free(label);
3733 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3734 const struct qstr *name, struct nfs_fh *fhandle,
3735 struct nfs_fattr *fattr, struct nfs4_label *label)
3737 struct nfs_server *server = NFS_SERVER(dir);
3739 struct nfs4_lookup_arg args = {
3740 .bitmask = server->attr_bitmask,
3741 .dir_fh = NFS_FH(dir),
3744 struct nfs4_lookup_res res = {
3750 struct rpc_message msg = {
3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3756 args.bitmask = nfs4_bitmask(server, label);
3758 nfs_fattr_init(fattr);
3760 dprintk("NFS call lookup %s\n", name->name);
3761 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3762 dprintk("NFS reply lookup: %d\n", status);
3766 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3768 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3769 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3770 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3774 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3775 const struct qstr *name, struct nfs_fh *fhandle,
3776 struct nfs_fattr *fattr, struct nfs4_label *label)
3778 struct nfs4_exception exception = { };
3779 struct rpc_clnt *client = *clnt;
3782 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3783 trace_nfs4_lookup(dir, name, err);
3785 case -NFS4ERR_BADNAME:
3788 case -NFS4ERR_MOVED:
3789 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3790 if (err == -NFS4ERR_MOVED)
3791 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3793 case -NFS4ERR_WRONGSEC:
3795 if (client != *clnt)
3797 client = nfs4_negotiate_security(client, dir, name);
3799 return PTR_ERR(client);
3801 exception.retry = 1;
3804 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3806 } while (exception.retry);
3811 else if (client != *clnt)
3812 rpc_shutdown_client(client);
3817 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3818 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3819 struct nfs4_label *label)
3822 struct rpc_clnt *client = NFS_CLIENT(dir);
3824 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3825 if (client != NFS_CLIENT(dir)) {
3826 rpc_shutdown_client(client);
3827 nfs_fixup_secinfo_attributes(fattr);
3833 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3834 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3836 struct rpc_clnt *client = NFS_CLIENT(dir);
3839 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3841 return ERR_PTR(status);
3842 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3845 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3847 struct nfs_server *server = NFS_SERVER(inode);
3848 struct nfs4_accessargs args = {
3849 .fh = NFS_FH(inode),
3850 .bitmask = server->cache_consistency_bitmask,
3852 struct nfs4_accessres res = {
3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3859 .rpc_cred = entry->cred,
3861 int mode = entry->mask;
3865 * Determine which access bits we want to ask for...
3867 if (mode & MAY_READ)
3868 args.access |= NFS4_ACCESS_READ;
3869 if (S_ISDIR(inode->i_mode)) {
3870 if (mode & MAY_WRITE)
3871 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3872 if (mode & MAY_EXEC)
3873 args.access |= NFS4_ACCESS_LOOKUP;
3875 if (mode & MAY_WRITE)
3876 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3877 if (mode & MAY_EXEC)
3878 args.access |= NFS4_ACCESS_EXECUTE;
3881 res.fattr = nfs_alloc_fattr();
3882 if (res.fattr == NULL)
3885 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3887 nfs_access_set_mask(entry, res.access);
3888 nfs_refresh_inode(inode, res.fattr);
3890 nfs_free_fattr(res.fattr);
3894 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3896 struct nfs4_exception exception = { };
3899 err = _nfs4_proc_access(inode, entry);
3900 trace_nfs4_access(inode, err);
3901 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3903 } while (exception.retry);
3908 * TODO: For the time being, we don't try to get any attributes
3909 * along with any of the zero-copy operations READ, READDIR,
3912 * In the case of the first three, we want to put the GETATTR
3913 * after the read-type operation -- this is because it is hard
3914 * to predict the length of a GETATTR response in v4, and thus
3915 * align the READ data correctly. This means that the GETATTR
3916 * may end up partially falling into the page cache, and we should
3917 * shift it into the 'tail' of the xdr_buf before processing.
3918 * To do this efficiently, we need to know the total length
3919 * of data received, which doesn't seem to be available outside
3922 * In the case of WRITE, we also want to put the GETATTR after
3923 * the operation -- in this case because we want to make sure
3924 * we get the post-operation mtime and size.
3926 * Both of these changes to the XDR layer would in fact be quite
3927 * minor, but I decided to leave them for a subsequent patch.
3929 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3930 unsigned int pgbase, unsigned int pglen)
3932 struct nfs4_readlink args = {
3933 .fh = NFS_FH(inode),
3938 struct nfs4_readlink_res res;
3939 struct rpc_message msg = {
3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3945 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3948 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3949 unsigned int pgbase, unsigned int pglen)
3951 struct nfs4_exception exception = { };
3954 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3955 trace_nfs4_readlink(inode, err);
3956 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3958 } while (exception.retry);
3963 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3966 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3969 struct nfs4_label l, *ilabel = NULL;
3970 struct nfs_open_context *ctx;
3971 struct nfs4_state *state;
3974 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3976 return PTR_ERR(ctx);
3978 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3980 sattr->ia_mode &= ~current_umask();
3981 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3982 if (IS_ERR(state)) {
3983 status = PTR_ERR(state);
3987 nfs4_label_release_security(ilabel);
3988 put_nfs_open_context(ctx);
3992 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3994 struct nfs_server *server = NFS_SERVER(dir);
3995 struct nfs_removeargs args = {
3999 struct nfs_removeres res = {
4002 struct rpc_message msg = {
4003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4009 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4011 update_changeattr(dir, &res.cinfo);
4015 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4017 struct nfs4_exception exception = { };
4020 err = _nfs4_proc_remove(dir, name);
4021 trace_nfs4_remove(dir, name, err);
4022 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4024 } while (exception.retry);
4028 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
4030 struct nfs_server *server = NFS_SERVER(dir);
4031 struct nfs_removeargs *args = msg->rpc_argp;
4032 struct nfs_removeres *res = msg->rpc_resp;
4034 res->server = server;
4035 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4036 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
4038 nfs_fattr_init(res->dir_attr);
4041 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4043 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
4044 &data->args.seq_args,
4049 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4051 struct nfs_unlinkdata *data = task->tk_calldata;
4052 struct nfs_removeres *res = &data->res;
4054 if (!nfs4_sequence_done(task, &res->seq_res))
4056 if (nfs4_async_handle_error(task, res->server, NULL,
4057 &data->timeout) == -EAGAIN)
4059 update_changeattr(dir, &res->cinfo);
4063 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4065 struct nfs_server *server = NFS_SERVER(dir);
4066 struct nfs_renameargs *arg = msg->rpc_argp;
4067 struct nfs_renameres *res = msg->rpc_resp;
4069 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4070 res->server = server;
4071 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4074 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4076 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4077 &data->args.seq_args,
4082 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4083 struct inode *new_dir)
4085 struct nfs_renamedata *data = task->tk_calldata;
4086 struct nfs_renameres *res = &data->res;
4088 if (!nfs4_sequence_done(task, &res->seq_res))
4090 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4093 update_changeattr(old_dir, &res->old_cinfo);
4094 update_changeattr(new_dir, &res->new_cinfo);
4098 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4100 struct nfs_server *server = NFS_SERVER(inode);
4101 struct nfs4_link_arg arg = {
4102 .fh = NFS_FH(inode),
4103 .dir_fh = NFS_FH(dir),
4105 .bitmask = server->attr_bitmask,
4107 struct nfs4_link_res res = {
4111 struct rpc_message msg = {
4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4116 int status = -ENOMEM;
4118 res.fattr = nfs_alloc_fattr();
4119 if (res.fattr == NULL)
4122 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4123 if (IS_ERR(res.label)) {
4124 status = PTR_ERR(res.label);
4127 arg.bitmask = nfs4_bitmask(server, res.label);
4129 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4131 update_changeattr(dir, &res.cinfo);
4132 status = nfs_post_op_update_inode(inode, res.fattr);
4134 nfs_setsecurity(inode, res.fattr, res.label);
4138 nfs4_label_free(res.label);
4141 nfs_free_fattr(res.fattr);
4145 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4147 struct nfs4_exception exception = { };
4150 err = nfs4_handle_exception(NFS_SERVER(inode),
4151 _nfs4_proc_link(inode, dir, name),
4153 } while (exception.retry);
4157 struct nfs4_createdata {
4158 struct rpc_message msg;
4159 struct nfs4_create_arg arg;
4160 struct nfs4_create_res res;
4162 struct nfs_fattr fattr;
4163 struct nfs4_label *label;
4166 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4167 const struct qstr *name, struct iattr *sattr, u32 ftype)
4169 struct nfs4_createdata *data;
4171 data = kzalloc(sizeof(*data), GFP_KERNEL);
4173 struct nfs_server *server = NFS_SERVER(dir);
4175 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4176 if (IS_ERR(data->label))
4179 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4180 data->msg.rpc_argp = &data->arg;
4181 data->msg.rpc_resp = &data->res;
4182 data->arg.dir_fh = NFS_FH(dir);
4183 data->arg.server = server;
4184 data->arg.name = name;
4185 data->arg.attrs = sattr;
4186 data->arg.ftype = ftype;
4187 data->arg.bitmask = nfs4_bitmask(server, data->label);
4188 data->res.server = server;
4189 data->res.fh = &data->fh;
4190 data->res.fattr = &data->fattr;
4191 data->res.label = data->label;
4192 nfs_fattr_init(data->res.fattr);
4200 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4202 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4203 &data->arg.seq_args, &data->res.seq_res, 1);
4205 update_changeattr(dir, &data->res.dir_cinfo);
4206 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4211 static void nfs4_free_createdata(struct nfs4_createdata *data)
4213 nfs4_label_free(data->label);
4217 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4218 struct page *page, unsigned int len, struct iattr *sattr,
4219 struct nfs4_label *label)
4221 struct nfs4_createdata *data;
4222 int status = -ENAMETOOLONG;
4224 if (len > NFS4_MAXPATHLEN)
4228 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4232 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4233 data->arg.u.symlink.pages = &page;
4234 data->arg.u.symlink.len = len;
4235 data->arg.label = label;
4237 status = nfs4_do_create(dir, dentry, data);
4239 nfs4_free_createdata(data);
4244 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4245 struct page *page, unsigned int len, struct iattr *sattr)
4247 struct nfs4_exception exception = { };
4248 struct nfs4_label l, *label = NULL;
4251 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4254 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4255 trace_nfs4_symlink(dir, &dentry->d_name, err);
4256 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4258 } while (exception.retry);
4260 nfs4_label_release_security(label);
4264 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4265 struct iattr *sattr, struct nfs4_label *label)
4267 struct nfs4_createdata *data;
4268 int status = -ENOMEM;
4270 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4274 data->arg.label = label;
4275 status = nfs4_do_create(dir, dentry, data);
4277 nfs4_free_createdata(data);
4282 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4283 struct iattr *sattr)
4285 struct nfs4_exception exception = { };
4286 struct nfs4_label l, *label = NULL;
4289 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4291 sattr->ia_mode &= ~current_umask();
4293 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4294 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4295 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4297 } while (exception.retry);
4298 nfs4_label_release_security(label);
4303 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4304 u64 cookie, struct page **pages, unsigned int count, int plus)
4306 struct inode *dir = d_inode(dentry);
4307 struct nfs4_readdir_arg args = {
4312 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4315 struct nfs4_readdir_res res;
4316 struct rpc_message msg = {
4317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4324 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4326 (unsigned long long)cookie);
4327 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4328 res.pgbase = args.pgbase;
4329 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4331 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4332 status += args.pgbase;
4335 nfs_invalidate_atime(dir);
4337 dprintk("%s: returns %d\n", __func__, status);
4341 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4342 u64 cookie, struct page **pages, unsigned int count, int plus)
4344 struct nfs4_exception exception = { };
4347 err = _nfs4_proc_readdir(dentry, cred, cookie,
4348 pages, count, plus);
4349 trace_nfs4_readdir(d_inode(dentry), err);
4350 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4352 } while (exception.retry);
4356 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4357 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4359 struct nfs4_createdata *data;
4360 int mode = sattr->ia_mode;
4361 int status = -ENOMEM;
4363 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4368 data->arg.ftype = NF4FIFO;
4369 else if (S_ISBLK(mode)) {
4370 data->arg.ftype = NF4BLK;
4371 data->arg.u.device.specdata1 = MAJOR(rdev);
4372 data->arg.u.device.specdata2 = MINOR(rdev);
4374 else if (S_ISCHR(mode)) {
4375 data->arg.ftype = NF4CHR;
4376 data->arg.u.device.specdata1 = MAJOR(rdev);
4377 data->arg.u.device.specdata2 = MINOR(rdev);
4378 } else if (!S_ISSOCK(mode)) {
4383 data->arg.label = label;
4384 status = nfs4_do_create(dir, dentry, data);
4386 nfs4_free_createdata(data);
4391 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4392 struct iattr *sattr, dev_t rdev)
4394 struct nfs4_exception exception = { };
4395 struct nfs4_label l, *label = NULL;
4398 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4400 sattr->ia_mode &= ~current_umask();
4402 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4403 trace_nfs4_mknod(dir, &dentry->d_name, err);
4404 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4406 } while (exception.retry);
4408 nfs4_label_release_security(label);
4413 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4414 struct nfs_fsstat *fsstat)
4416 struct nfs4_statfs_arg args = {
4418 .bitmask = server->attr_bitmask,
4420 struct nfs4_statfs_res res = {
4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4429 nfs_fattr_init(fsstat->fattr);
4430 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4433 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4435 struct nfs4_exception exception = { };
4438 err = nfs4_handle_exception(server,
4439 _nfs4_proc_statfs(server, fhandle, fsstat),
4441 } while (exception.retry);
4445 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4446 struct nfs_fsinfo *fsinfo)
4448 struct nfs4_fsinfo_arg args = {
4450 .bitmask = server->attr_bitmask,
4452 struct nfs4_fsinfo_res res = {
4455 struct rpc_message msg = {
4456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4461 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4464 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4466 struct nfs4_exception exception = { };
4467 unsigned long now = jiffies;
4471 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4472 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4474 nfs4_set_lease_period(server->nfs_client,
4475 fsinfo->lease_time * HZ,
4479 err = nfs4_handle_exception(server, err, &exception);
4480 } while (exception.retry);
4484 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4488 nfs_fattr_init(fsinfo->fattr);
4489 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4491 /* block layout checks this! */
4492 server->pnfs_blksize = fsinfo->blksize;
4493 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4499 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4500 struct nfs_pathconf *pathconf)
4502 struct nfs4_pathconf_arg args = {
4504 .bitmask = server->attr_bitmask,
4506 struct nfs4_pathconf_res res = {
4507 .pathconf = pathconf,
4509 struct rpc_message msg = {
4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4515 /* None of the pathconf attributes are mandatory to implement */
4516 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4517 memset(pathconf, 0, sizeof(*pathconf));
4521 nfs_fattr_init(pathconf->fattr);
4522 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4525 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4526 struct nfs_pathconf *pathconf)
4528 struct nfs4_exception exception = { };
4532 err = nfs4_handle_exception(server,
4533 _nfs4_proc_pathconf(server, fhandle, pathconf),
4535 } while (exception.retry);
4539 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4540 const struct nfs_open_context *ctx,
4541 const struct nfs_lock_context *l_ctx,
4544 const struct nfs_lockowner *lockowner = NULL;
4547 lockowner = &l_ctx->lockowner;
4548 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
4550 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4552 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4553 const struct nfs_open_context *ctx,
4554 const struct nfs_lock_context *l_ctx,
4557 nfs4_stateid current_stateid;
4559 /* If the current stateid represents a lost lock, then exit */
4560 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4562 return nfs4_stateid_match(stateid, ¤t_stateid);
4565 static bool nfs4_error_stateid_expired(int err)
4568 case -NFS4ERR_DELEG_REVOKED:
4569 case -NFS4ERR_ADMIN_REVOKED:
4570 case -NFS4ERR_BAD_STATEID:
4571 case -NFS4ERR_STALE_STATEID:
4572 case -NFS4ERR_OLD_STATEID:
4573 case -NFS4ERR_OPENMODE:
4574 case -NFS4ERR_EXPIRED:
4580 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4582 struct nfs_server *server = NFS_SERVER(hdr->inode);
4584 trace_nfs4_read(hdr, task->tk_status);
4585 if (task->tk_status < 0) {
4586 struct nfs4_exception exception = {
4587 .inode = hdr->inode,
4588 .state = hdr->args.context->state,
4589 .stateid = &hdr->args.stateid,
4591 task->tk_status = nfs4_async_handle_exception(task,
4592 server, task->tk_status, &exception);
4593 if (exception.retry) {
4594 rpc_restart_call_prepare(task);
4599 if (task->tk_status > 0)
4600 renew_lease(server, hdr->timestamp);
4604 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4605 struct nfs_pgio_args *args)
4608 if (!nfs4_error_stateid_expired(task->tk_status) ||
4609 nfs4_stateid_is_current(&args->stateid,
4614 rpc_restart_call_prepare(task);
4618 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4621 dprintk("--> %s\n", __func__);
4623 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4625 if (nfs4_read_stateid_changed(task, &hdr->args))
4627 if (task->tk_status > 0)
4628 nfs_invalidate_atime(hdr->inode);
4629 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4630 nfs4_read_done_cb(task, hdr);
4633 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4634 struct rpc_message *msg)
4636 hdr->timestamp = jiffies;
4637 if (!hdr->pgio_done_cb)
4638 hdr->pgio_done_cb = nfs4_read_done_cb;
4639 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4640 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4643 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4644 struct nfs_pgio_header *hdr)
4646 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4647 &hdr->args.seq_args,
4651 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4652 hdr->args.lock_context,
4653 hdr->rw_ops->rw_mode) == -EIO)
4655 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4660 static int nfs4_write_done_cb(struct rpc_task *task,
4661 struct nfs_pgio_header *hdr)
4663 struct inode *inode = hdr->inode;
4665 trace_nfs4_write(hdr, task->tk_status);
4666 if (task->tk_status < 0) {
4667 struct nfs4_exception exception = {
4668 .inode = hdr->inode,
4669 .state = hdr->args.context->state,
4670 .stateid = &hdr->args.stateid,
4672 task->tk_status = nfs4_async_handle_exception(task,
4673 NFS_SERVER(inode), task->tk_status,
4675 if (exception.retry) {
4676 rpc_restart_call_prepare(task);
4680 if (task->tk_status >= 0) {
4681 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4682 nfs_writeback_update_inode(hdr);
4687 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4688 struct nfs_pgio_args *args)
4691 if (!nfs4_error_stateid_expired(task->tk_status) ||
4692 nfs4_stateid_is_current(&args->stateid,
4697 rpc_restart_call_prepare(task);
4701 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4703 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4705 if (nfs4_write_stateid_changed(task, &hdr->args))
4707 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4708 nfs4_write_done_cb(task, hdr);
4712 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4714 /* Don't request attributes for pNFS or O_DIRECT writes */
4715 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4717 /* Otherwise, request attributes if and only if we don't hold
4720 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4723 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4724 struct rpc_message *msg)
4726 struct nfs_server *server = NFS_SERVER(hdr->inode);
4728 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4729 hdr->args.bitmask = NULL;
4730 hdr->res.fattr = NULL;
4732 hdr->args.bitmask = server->cache_consistency_bitmask;
4734 if (!hdr->pgio_done_cb)
4735 hdr->pgio_done_cb = nfs4_write_done_cb;
4736 hdr->res.server = server;
4737 hdr->timestamp = jiffies;
4739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4740 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4743 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4745 nfs4_setup_sequence(NFS_SERVER(data->inode),
4746 &data->args.seq_args,
4751 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4753 struct inode *inode = data->inode;
4755 trace_nfs4_commit(data, task->tk_status);
4756 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4757 NULL, NULL) == -EAGAIN) {
4758 rpc_restart_call_prepare(task);
4764 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4766 if (!nfs4_sequence_done(task, &data->res.seq_res))
4768 return data->commit_done_cb(task, data);
4771 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4773 struct nfs_server *server = NFS_SERVER(data->inode);
4775 if (data->commit_done_cb == NULL)
4776 data->commit_done_cb = nfs4_commit_done_cb;
4777 data->res.server = server;
4778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4779 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4782 struct nfs4_renewdata {
4783 struct nfs_client *client;
4784 unsigned long timestamp;
4788 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4789 * standalone procedure for queueing an asynchronous RENEW.
4791 static void nfs4_renew_release(void *calldata)
4793 struct nfs4_renewdata *data = calldata;
4794 struct nfs_client *clp = data->client;
4796 if (atomic_read(&clp->cl_count) > 1)
4797 nfs4_schedule_state_renewal(clp);
4798 nfs_put_client(clp);
4802 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4804 struct nfs4_renewdata *data = calldata;
4805 struct nfs_client *clp = data->client;
4806 unsigned long timestamp = data->timestamp;
4808 trace_nfs4_renew_async(clp, task->tk_status);
4809 switch (task->tk_status) {
4812 case -NFS4ERR_LEASE_MOVED:
4813 nfs4_schedule_lease_moved_recovery(clp);
4816 /* Unless we're shutting down, schedule state recovery! */
4817 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4819 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4820 nfs4_schedule_lease_recovery(clp);
4823 nfs4_schedule_path_down_recovery(clp);
4825 do_renew_lease(clp, timestamp);
4828 static const struct rpc_call_ops nfs4_renew_ops = {
4829 .rpc_call_done = nfs4_renew_done,
4830 .rpc_release = nfs4_renew_release,
4833 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4835 struct rpc_message msg = {
4836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4840 struct nfs4_renewdata *data;
4842 if (renew_flags == 0)
4844 if (!atomic_inc_not_zero(&clp->cl_count))
4846 data = kmalloc(sizeof(*data), GFP_NOFS);
4850 data->timestamp = jiffies;
4851 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4852 &nfs4_renew_ops, data);
4855 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4857 struct rpc_message msg = {
4858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4862 unsigned long now = jiffies;
4865 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4868 do_renew_lease(clp, now);
4872 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4874 return server->caps & NFS_CAP_ACLS;
4877 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4878 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4881 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4883 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4884 struct page **pages)
4886 struct page *newpage, **spages;
4892 len = min_t(size_t, PAGE_SIZE, buflen);
4893 newpage = alloc_page(GFP_KERNEL);
4895 if (newpage == NULL)
4897 memcpy(page_address(newpage), buf, len);
4902 } while (buflen != 0);
4908 __free_page(spages[rc-1]);
4912 struct nfs4_cached_acl {
4918 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4920 struct nfs_inode *nfsi = NFS_I(inode);
4922 spin_lock(&inode->i_lock);
4923 kfree(nfsi->nfs4_acl);
4924 nfsi->nfs4_acl = acl;
4925 spin_unlock(&inode->i_lock);
4928 static void nfs4_zap_acl_attr(struct inode *inode)
4930 nfs4_set_cached_acl(inode, NULL);
4933 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4935 struct nfs_inode *nfsi = NFS_I(inode);
4936 struct nfs4_cached_acl *acl;
4939 spin_lock(&inode->i_lock);
4940 acl = nfsi->nfs4_acl;
4943 if (buf == NULL) /* user is just asking for length */
4945 if (acl->cached == 0)
4947 ret = -ERANGE; /* see getxattr(2) man page */
4948 if (acl->len > buflen)
4950 memcpy(buf, acl->data, acl->len);
4954 spin_unlock(&inode->i_lock);
4958 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4960 struct nfs4_cached_acl *acl;
4961 size_t buflen = sizeof(*acl) + acl_len;
4963 if (buflen <= PAGE_SIZE) {
4964 acl = kmalloc(buflen, GFP_KERNEL);
4968 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4970 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4977 nfs4_set_cached_acl(inode, acl);
4981 * The getxattr API returns the required buffer length when called with a
4982 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4983 * the required buf. On a NULL buf, we send a page of data to the server
4984 * guessing that the ACL request can be serviced by a page. If so, we cache
4985 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4986 * the cache. If not so, we throw away the page, and cache the required
4987 * length. The next getxattr call will then produce another round trip to
4988 * the server, this time with the input buf of the required size.
4990 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4992 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4993 struct nfs_getaclargs args = {
4994 .fh = NFS_FH(inode),
4998 struct nfs_getaclres res = {
5001 struct rpc_message msg = {
5002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5006 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5007 int ret = -ENOMEM, i;
5009 /* As long as we're doing a round trip to the server anyway,
5010 * let's be prepared for a page of acl data. */
5013 if (npages > ARRAY_SIZE(pages))
5016 for (i = 0; i < npages; i++) {
5017 pages[i] = alloc_page(GFP_KERNEL);
5022 /* for decoding across pages */
5023 res.acl_scratch = alloc_page(GFP_KERNEL);
5024 if (!res.acl_scratch)
5027 args.acl_len = npages * PAGE_SIZE;
5029 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5030 __func__, buf, buflen, npages, args.acl_len);
5031 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5032 &msg, &args.seq_args, &res.seq_res, 0);
5036 /* Handle the case where the passed-in buffer is too short */
5037 if (res.acl_flags & NFS4_ACL_TRUNC) {
5038 /* Did the user only issue a request for the acl length? */
5044 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5046 if (res.acl_len > buflen) {
5050 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5055 for (i = 0; i < npages; i++)
5057 __free_page(pages[i]);
5058 if (res.acl_scratch)
5059 __free_page(res.acl_scratch);
5063 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5065 struct nfs4_exception exception = { };
5068 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5069 trace_nfs4_get_acl(inode, ret);
5072 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5073 } while (exception.retry);
5077 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5079 struct nfs_server *server = NFS_SERVER(inode);
5082 if (!nfs4_server_supports_acls(server))
5084 ret = nfs_revalidate_inode(server, inode);
5087 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5088 nfs_zap_acl_cache(inode);
5089 ret = nfs4_read_cached_acl(inode, buf, buflen);
5091 /* -ENOENT is returned if there is no ACL or if there is an ACL
5092 * but no cached acl data, just the acl length */
5094 return nfs4_get_acl_uncached(inode, buf, buflen);
5097 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5099 struct nfs_server *server = NFS_SERVER(inode);
5100 struct page *pages[NFS4ACL_MAXPAGES];
5101 struct nfs_setaclargs arg = {
5102 .fh = NFS_FH(inode),
5106 struct nfs_setaclres res;
5107 struct rpc_message msg = {
5108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5112 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5115 if (!nfs4_server_supports_acls(server))
5117 if (npages > ARRAY_SIZE(pages))
5119 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5122 nfs4_inode_return_delegation(inode);
5123 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5126 * Free each page after tx, so the only ref left is
5127 * held by the network stack
5130 put_page(pages[i-1]);
5133 * Acl update can result in inode attribute update.
5134 * so mark the attribute cache invalid.
5136 spin_lock(&inode->i_lock);
5137 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5138 spin_unlock(&inode->i_lock);
5139 nfs_access_zap_cache(inode);
5140 nfs_zap_acl_cache(inode);
5144 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5146 struct nfs4_exception exception = { };
5149 err = __nfs4_proc_set_acl(inode, buf, buflen);
5150 trace_nfs4_set_acl(inode, err);
5151 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5153 } while (exception.retry);
5157 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5158 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5161 struct nfs_server *server = NFS_SERVER(inode);
5162 struct nfs_fattr fattr;
5163 struct nfs4_label label = {0, 0, buflen, buf};
5165 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5166 struct nfs4_getattr_arg arg = {
5167 .fh = NFS_FH(inode),
5170 struct nfs4_getattr_res res = {
5175 struct rpc_message msg = {
5176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5182 nfs_fattr_init(&fattr);
5184 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5187 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5189 if (buflen < label.len)
5194 static int nfs4_get_security_label(struct inode *inode, void *buf,
5197 struct nfs4_exception exception = { };
5200 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5204 err = _nfs4_get_security_label(inode, buf, buflen);
5205 trace_nfs4_get_security_label(inode, err);
5206 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5208 } while (exception.retry);
5212 static int _nfs4_do_set_security_label(struct inode *inode,
5213 struct nfs4_label *ilabel,
5214 struct nfs_fattr *fattr,
5215 struct nfs4_label *olabel)
5218 struct iattr sattr = {0};
5219 struct nfs_server *server = NFS_SERVER(inode);
5220 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5221 struct nfs_setattrargs arg = {
5222 .fh = NFS_FH(inode),
5228 struct nfs_setattrres res = {
5233 struct rpc_message msg = {
5234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5240 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5242 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5244 dprintk("%s failed: %d\n", __func__, status);
5249 static int nfs4_do_set_security_label(struct inode *inode,
5250 struct nfs4_label *ilabel,
5251 struct nfs_fattr *fattr,
5252 struct nfs4_label *olabel)
5254 struct nfs4_exception exception = { };
5258 err = _nfs4_do_set_security_label(inode, ilabel,
5260 trace_nfs4_set_security_label(inode, err);
5261 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5263 } while (exception.retry);
5268 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5270 struct nfs4_label ilabel, *olabel = NULL;
5271 struct nfs_fattr fattr;
5272 struct rpc_cred *cred;
5275 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5278 nfs_fattr_init(&fattr);
5282 ilabel.label = (char *)buf;
5283 ilabel.len = buflen;
5285 cred = rpc_lookup_cred();
5287 return PTR_ERR(cred);
5289 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5290 if (IS_ERR(olabel)) {
5291 status = -PTR_ERR(olabel);
5295 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5297 nfs_setsecurity(inode, &fattr, olabel);
5299 nfs4_label_free(olabel);
5304 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5307 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5308 nfs4_verifier *bootverf)
5312 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5313 /* An impossible timestamp guarantees this value
5314 * will never match a generated boot time. */
5315 verf[0] = cpu_to_be32(U32_MAX);
5316 verf[1] = cpu_to_be32(U32_MAX);
5318 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5319 u64 ns = ktime_to_ns(nn->boot_time);
5321 verf[0] = cpu_to_be32(ns >> 32);
5322 verf[1] = cpu_to_be32(ns);
5324 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5328 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5333 if (clp->cl_owner_id != NULL)
5337 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5338 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5340 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5344 if (len > NFS4_OPAQUE_LIMIT + 1)
5348 * Since this string is allocated at mount time, and held until the
5349 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5350 * about a memory-reclaim deadlock.
5352 str = kmalloc(len, GFP_KERNEL);
5357 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5359 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5360 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5363 clp->cl_owner_id = str;
5368 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5373 len = 10 + 10 + 1 + 10 + 1 +
5374 strlen(nfs4_client_id_uniquifier) + 1 +
5375 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5377 if (len > NFS4_OPAQUE_LIMIT + 1)
5381 * Since this string is allocated at mount time, and held until the
5382 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5383 * about a memory-reclaim deadlock.
5385 str = kmalloc(len, GFP_KERNEL);
5389 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5390 clp->rpc_ops->version, clp->cl_minorversion,
5391 nfs4_client_id_uniquifier,
5392 clp->cl_rpcclient->cl_nodename);
5393 clp->cl_owner_id = str;
5398 nfs4_init_uniform_client_string(struct nfs_client *clp)
5403 if (clp->cl_owner_id != NULL)
5406 if (nfs4_client_id_uniquifier[0] != '\0')
5407 return nfs4_init_uniquifier_client_string(clp);
5409 len = 10 + 10 + 1 + 10 + 1 +
5410 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5412 if (len > NFS4_OPAQUE_LIMIT + 1)
5416 * Since this string is allocated at mount time, and held until the
5417 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5418 * about a memory-reclaim deadlock.
5420 str = kmalloc(len, GFP_KERNEL);
5424 scnprintf(str, len, "Linux NFSv%u.%u %s",
5425 clp->rpc_ops->version, clp->cl_minorversion,
5426 clp->cl_rpcclient->cl_nodename);
5427 clp->cl_owner_id = str;
5432 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5433 * services. Advertise one based on the address family of the
5437 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5439 if (strchr(clp->cl_ipaddr, ':') != NULL)
5440 return scnprintf(buf, len, "tcp6");
5442 return scnprintf(buf, len, "tcp");
5445 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5447 struct nfs4_setclientid *sc = calldata;
5449 if (task->tk_status == 0)
5450 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5453 static const struct rpc_call_ops nfs4_setclientid_ops = {
5454 .rpc_call_done = nfs4_setclientid_done,
5458 * nfs4_proc_setclientid - Negotiate client ID
5459 * @clp: state data structure
5460 * @program: RPC program for NFSv4 callback service
5461 * @port: IP port number for NFS4 callback service
5462 * @cred: RPC credential to use for this call
5463 * @res: where to place the result
5465 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5467 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5468 unsigned short port, struct rpc_cred *cred,
5469 struct nfs4_setclientid_res *res)
5471 nfs4_verifier sc_verifier;
5472 struct nfs4_setclientid setclientid = {
5473 .sc_verifier = &sc_verifier,
5477 struct rpc_message msg = {
5478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5479 .rpc_argp = &setclientid,
5483 struct rpc_task *task;
5484 struct rpc_task_setup task_setup_data = {
5485 .rpc_client = clp->cl_rpcclient,
5486 .rpc_message = &msg,
5487 .callback_ops = &nfs4_setclientid_ops,
5488 .callback_data = &setclientid,
5489 .flags = RPC_TASK_TIMEOUT,
5493 /* nfs_client_id4 */
5494 nfs4_init_boot_verifier(clp, &sc_verifier);
5496 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5497 status = nfs4_init_uniform_client_string(clp);
5499 status = nfs4_init_nonuniform_client_string(clp);
5505 setclientid.sc_netid_len =
5506 nfs4_init_callback_netid(clp,
5507 setclientid.sc_netid,
5508 sizeof(setclientid.sc_netid));
5509 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5510 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5511 clp->cl_ipaddr, port >> 8, port & 255);
5513 dprintk("NFS call setclientid auth=%s, '%s'\n",
5514 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5516 task = rpc_run_task(&task_setup_data);
5518 status = PTR_ERR(task);
5521 status = task->tk_status;
5522 if (setclientid.sc_cred) {
5523 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5524 put_rpccred(setclientid.sc_cred);
5528 trace_nfs4_setclientid(clp, status);
5529 dprintk("NFS reply setclientid: %d\n", status);
5534 * nfs4_proc_setclientid_confirm - Confirm client ID
5535 * @clp: state data structure
5536 * @res: result of a previous SETCLIENTID
5537 * @cred: RPC credential to use for this call
5539 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5541 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5542 struct nfs4_setclientid_res *arg,
5543 struct rpc_cred *cred)
5545 struct rpc_message msg = {
5546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5552 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5553 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5555 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5556 trace_nfs4_setclientid_confirm(clp, status);
5557 dprintk("NFS reply setclientid_confirm: %d\n", status);
5561 struct nfs4_delegreturndata {
5562 struct nfs4_delegreturnargs args;
5563 struct nfs4_delegreturnres res;
5565 nfs4_stateid stateid;
5566 unsigned long timestamp;
5567 struct nfs_fattr fattr;
5569 struct inode *inode;
5574 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5576 struct nfs4_delegreturndata *data = calldata;
5578 if (!nfs4_sequence_done(task, &data->res.seq_res))
5581 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5582 switch (task->tk_status) {
5584 renew_lease(data->res.server, data->timestamp);
5586 case -NFS4ERR_ADMIN_REVOKED:
5587 case -NFS4ERR_DELEG_REVOKED:
5588 case -NFS4ERR_EXPIRED:
5589 nfs4_free_revoked_stateid(data->res.server,
5591 task->tk_msg.rpc_cred);
5592 case -NFS4ERR_BAD_STATEID:
5593 case -NFS4ERR_OLD_STATEID:
5594 case -NFS4ERR_STALE_STATEID:
5595 task->tk_status = 0;
5598 if (nfs4_async_handle_error(task, data->res.server,
5599 NULL, NULL) == -EAGAIN) {
5600 rpc_restart_call_prepare(task);
5604 data->rpc_status = task->tk_status;
5605 if (data->roc && data->rpc_status == 0)
5606 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5609 static void nfs4_delegreturn_release(void *calldata)
5611 struct nfs4_delegreturndata *data = calldata;
5612 struct inode *inode = data->inode;
5616 pnfs_roc_release(inode);
5617 nfs_iput_and_deactive(inode);
5622 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5624 struct nfs4_delegreturndata *d_data;
5626 d_data = (struct nfs4_delegreturndata *)data;
5628 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5632 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5634 nfs4_setup_sequence(d_data->res.server,
5635 &d_data->args.seq_args,
5636 &d_data->res.seq_res,
5640 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5641 .rpc_call_prepare = nfs4_delegreturn_prepare,
5642 .rpc_call_done = nfs4_delegreturn_done,
5643 .rpc_release = nfs4_delegreturn_release,
5646 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5648 struct nfs4_delegreturndata *data;
5649 struct nfs_server *server = NFS_SERVER(inode);
5650 struct rpc_task *task;
5651 struct rpc_message msg = {
5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5655 struct rpc_task_setup task_setup_data = {
5656 .rpc_client = server->client,
5657 .rpc_message = &msg,
5658 .callback_ops = &nfs4_delegreturn_ops,
5659 .flags = RPC_TASK_ASYNC,
5663 data = kzalloc(sizeof(*data), GFP_NOFS);
5666 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5668 nfs4_state_protect(server->nfs_client,
5669 NFS_SP4_MACH_CRED_CLEANUP,
5670 &task_setup_data.rpc_client, &msg);
5672 data->args.fhandle = &data->fh;
5673 data->args.stateid = &data->stateid;
5674 data->args.bitmask = server->cache_consistency_bitmask;
5675 nfs_copy_fh(&data->fh, NFS_FH(inode));
5676 nfs4_stateid_copy(&data->stateid, stateid);
5677 data->res.fattr = &data->fattr;
5678 data->res.server = server;
5679 nfs_fattr_init(data->res.fattr);
5680 data->timestamp = jiffies;
5681 data->rpc_status = 0;
5682 data->inode = nfs_igrab_and_active(inode);
5684 data->roc = nfs4_roc(inode);
5686 task_setup_data.callback_data = data;
5687 msg.rpc_argp = &data->args;
5688 msg.rpc_resp = &data->res;
5689 task = rpc_run_task(&task_setup_data);
5691 return PTR_ERR(task);
5694 status = nfs4_wait_for_completion_rpc_task(task);
5697 status = data->rpc_status;
5699 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5701 nfs_refresh_inode(inode, &data->fattr);
5707 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5709 struct nfs_server *server = NFS_SERVER(inode);
5710 struct nfs4_exception exception = { };
5713 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5714 trace_nfs4_delegreturn(inode, stateid, err);
5716 case -NFS4ERR_STALE_STATEID:
5717 case -NFS4ERR_EXPIRED:
5721 err = nfs4_handle_exception(server, err, &exception);
5722 } while (exception.retry);
5726 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5728 struct inode *inode = state->inode;
5729 struct nfs_server *server = NFS_SERVER(inode);
5730 struct nfs_client *clp = server->nfs_client;
5731 struct nfs_lockt_args arg = {
5732 .fh = NFS_FH(inode),
5735 struct nfs_lockt_res res = {
5738 struct rpc_message msg = {
5739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5742 .rpc_cred = state->owner->so_cred,
5744 struct nfs4_lock_state *lsp;
5747 arg.lock_owner.clientid = clp->cl_clientid;
5748 status = nfs4_set_lock_state(state, request);
5751 lsp = request->fl_u.nfs4_fl.owner;
5752 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5753 arg.lock_owner.s_dev = server->s_dev;
5754 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5757 request->fl_type = F_UNLCK;
5759 case -NFS4ERR_DENIED:
5762 request->fl_ops->fl_release_private(request);
5763 request->fl_ops = NULL;
5768 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5770 struct nfs4_exception exception = { };
5774 err = _nfs4_proc_getlk(state, cmd, request);
5775 trace_nfs4_get_lock(request, state, cmd, err);
5776 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5778 } while (exception.retry);
5782 struct nfs4_unlockdata {
5783 struct nfs_locku_args arg;
5784 struct nfs_locku_res res;
5785 struct nfs4_lock_state *lsp;
5786 struct nfs_open_context *ctx;
5787 struct file_lock fl;
5788 struct nfs_server *server;
5789 unsigned long timestamp;
5792 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5793 struct nfs_open_context *ctx,
5794 struct nfs4_lock_state *lsp,
5795 struct nfs_seqid *seqid)
5797 struct nfs4_unlockdata *p;
5798 struct inode *inode = lsp->ls_state->inode;
5800 p = kzalloc(sizeof(*p), GFP_NOFS);
5803 p->arg.fh = NFS_FH(inode);
5805 p->arg.seqid = seqid;
5806 p->res.seqid = seqid;
5808 atomic_inc(&lsp->ls_count);
5809 /* Ensure we don't close file until we're done freeing locks! */
5810 p->ctx = get_nfs_open_context(ctx);
5811 memcpy(&p->fl, fl, sizeof(p->fl));
5812 p->server = NFS_SERVER(inode);
5816 static void nfs4_locku_release_calldata(void *data)
5818 struct nfs4_unlockdata *calldata = data;
5819 nfs_free_seqid(calldata->arg.seqid);
5820 nfs4_put_lock_state(calldata->lsp);
5821 put_nfs_open_context(calldata->ctx);
5825 static void nfs4_locku_done(struct rpc_task *task, void *data)
5827 struct nfs4_unlockdata *calldata = data;
5829 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5831 switch (task->tk_status) {
5833 renew_lease(calldata->server, calldata->timestamp);
5834 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5835 if (nfs4_update_lock_stateid(calldata->lsp,
5836 &calldata->res.stateid))
5838 case -NFS4ERR_ADMIN_REVOKED:
5839 case -NFS4ERR_EXPIRED:
5840 nfs4_free_revoked_stateid(calldata->server,
5841 &calldata->arg.stateid,
5842 task->tk_msg.rpc_cred);
5843 case -NFS4ERR_BAD_STATEID:
5844 case -NFS4ERR_OLD_STATEID:
5845 case -NFS4ERR_STALE_STATEID:
5846 if (!nfs4_stateid_match(&calldata->arg.stateid,
5847 &calldata->lsp->ls_stateid))
5848 rpc_restart_call_prepare(task);
5851 if (nfs4_async_handle_error(task, calldata->server,
5852 NULL, NULL) == -EAGAIN)
5853 rpc_restart_call_prepare(task);
5855 nfs_release_seqid(calldata->arg.seqid);
5858 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5860 struct nfs4_unlockdata *calldata = data;
5862 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5864 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5865 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5866 /* Note: exit _without_ running nfs4_locku_done */
5869 calldata->timestamp = jiffies;
5870 if (nfs4_setup_sequence(calldata->server,
5871 &calldata->arg.seq_args,
5872 &calldata->res.seq_res,
5874 nfs_release_seqid(calldata->arg.seqid);
5877 task->tk_action = NULL;
5879 nfs4_sequence_done(task, &calldata->res.seq_res);
5882 static const struct rpc_call_ops nfs4_locku_ops = {
5883 .rpc_call_prepare = nfs4_locku_prepare,
5884 .rpc_call_done = nfs4_locku_done,
5885 .rpc_release = nfs4_locku_release_calldata,
5888 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5889 struct nfs_open_context *ctx,
5890 struct nfs4_lock_state *lsp,
5891 struct nfs_seqid *seqid)
5893 struct nfs4_unlockdata *data;
5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5896 .rpc_cred = ctx->cred,
5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5900 .rpc_message = &msg,
5901 .callback_ops = &nfs4_locku_ops,
5902 .workqueue = nfsiod_workqueue,
5903 .flags = RPC_TASK_ASYNC,
5906 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5907 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5909 /* Ensure this is an unlock - when canceling a lock, the
5910 * canceled lock is passed in, and it won't be an unlock.
5912 fl->fl_type = F_UNLCK;
5914 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5916 nfs_free_seqid(seqid);
5917 return ERR_PTR(-ENOMEM);
5920 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5921 msg.rpc_argp = &data->arg;
5922 msg.rpc_resp = &data->res;
5923 task_setup_data.callback_data = data;
5924 return rpc_run_task(&task_setup_data);
5927 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5929 struct inode *inode = state->inode;
5930 struct nfs4_state_owner *sp = state->owner;
5931 struct nfs_inode *nfsi = NFS_I(inode);
5932 struct nfs_seqid *seqid;
5933 struct nfs4_lock_state *lsp;
5934 struct rpc_task *task;
5935 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5937 unsigned char fl_flags = request->fl_flags;
5939 status = nfs4_set_lock_state(state, request);
5940 /* Unlock _before_ we do the RPC call */
5941 request->fl_flags |= FL_EXISTS;
5942 /* Exclude nfs_delegation_claim_locks() */
5943 mutex_lock(&sp->so_delegreturn_mutex);
5944 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5945 down_read(&nfsi->rwsem);
5946 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
5947 up_read(&nfsi->rwsem);
5948 mutex_unlock(&sp->so_delegreturn_mutex);
5951 up_read(&nfsi->rwsem);
5952 mutex_unlock(&sp->so_delegreturn_mutex);
5955 /* Is this a delegated lock? */
5956 lsp = request->fl_u.nfs4_fl.owner;
5957 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5959 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5960 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5964 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5965 status = PTR_ERR(task);
5968 status = nfs4_wait_for_completion_rpc_task(task);
5971 request->fl_flags = fl_flags;
5972 trace_nfs4_unlock(request, state, F_SETLK, status);
5976 struct nfs4_lockdata {
5977 struct nfs_lock_args arg;
5978 struct nfs_lock_res res;
5979 struct nfs4_lock_state *lsp;
5980 struct nfs_open_context *ctx;
5981 struct file_lock fl;
5982 unsigned long timestamp;
5985 struct nfs_server *server;
5988 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5989 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5992 struct nfs4_lockdata *p;
5993 struct inode *inode = lsp->ls_state->inode;
5994 struct nfs_server *server = NFS_SERVER(inode);
5995 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5997 p = kzalloc(sizeof(*p), gfp_mask);
6001 p->arg.fh = NFS_FH(inode);
6003 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6004 if (IS_ERR(p->arg.open_seqid))
6006 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6007 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6008 if (IS_ERR(p->arg.lock_seqid))
6009 goto out_free_seqid;
6010 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6011 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6012 p->arg.lock_owner.s_dev = server->s_dev;
6013 p->res.lock_seqid = p->arg.lock_seqid;
6016 atomic_inc(&lsp->ls_count);
6017 p->ctx = get_nfs_open_context(ctx);
6018 get_file(fl->fl_file);
6019 memcpy(&p->fl, fl, sizeof(p->fl));
6022 nfs_free_seqid(p->arg.open_seqid);
6028 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6030 struct nfs4_lockdata *data = calldata;
6031 struct nfs4_state *state = data->lsp->ls_state;
6033 dprintk("%s: begin!\n", __func__);
6034 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6036 /* Do we need to do an open_to_lock_owner? */
6037 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6038 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6039 goto out_release_lock_seqid;
6041 nfs4_stateid_copy(&data->arg.open_stateid,
6042 &state->open_stateid);
6043 data->arg.new_lock_owner = 1;
6044 data->res.open_seqid = data->arg.open_seqid;
6046 data->arg.new_lock_owner = 0;
6047 nfs4_stateid_copy(&data->arg.lock_stateid,
6048 &data->lsp->ls_stateid);
6050 if (!nfs4_valid_open_stateid(state)) {
6051 data->rpc_status = -EBADF;
6052 task->tk_action = NULL;
6053 goto out_release_open_seqid;
6055 data->timestamp = jiffies;
6056 if (nfs4_setup_sequence(data->server,
6057 &data->arg.seq_args,
6061 out_release_open_seqid:
6062 nfs_release_seqid(data->arg.open_seqid);
6063 out_release_lock_seqid:
6064 nfs_release_seqid(data->arg.lock_seqid);
6066 nfs4_sequence_done(task, &data->res.seq_res);
6067 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6070 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6072 struct nfs4_lockdata *data = calldata;
6073 struct nfs4_lock_state *lsp = data->lsp;
6075 dprintk("%s: begin!\n", __func__);
6077 if (!nfs4_sequence_done(task, &data->res.seq_res))
6080 data->rpc_status = task->tk_status;
6081 switch (task->tk_status) {
6083 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6085 if (data->arg.new_lock) {
6086 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6087 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6088 rpc_restart_call_prepare(task);
6092 if (data->arg.new_lock_owner != 0) {
6093 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6094 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6095 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6096 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6097 rpc_restart_call_prepare(task);
6099 case -NFS4ERR_BAD_STATEID:
6100 case -NFS4ERR_OLD_STATEID:
6101 case -NFS4ERR_STALE_STATEID:
6102 case -NFS4ERR_EXPIRED:
6103 if (data->arg.new_lock_owner != 0) {
6104 if (!nfs4_stateid_match(&data->arg.open_stateid,
6105 &lsp->ls_state->open_stateid))
6106 rpc_restart_call_prepare(task);
6107 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6109 rpc_restart_call_prepare(task);
6111 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6114 static void nfs4_lock_release(void *calldata)
6116 struct nfs4_lockdata *data = calldata;
6118 dprintk("%s: begin!\n", __func__);
6119 nfs_free_seqid(data->arg.open_seqid);
6120 if (data->cancelled != 0) {
6121 struct rpc_task *task;
6122 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6123 data->arg.lock_seqid);
6125 rpc_put_task_async(task);
6126 dprintk("%s: cancelling lock!\n", __func__);
6128 nfs_free_seqid(data->arg.lock_seqid);
6129 nfs4_put_lock_state(data->lsp);
6130 put_nfs_open_context(data->ctx);
6131 fput(data->fl.fl_file);
6133 dprintk("%s: done!\n", __func__);
6136 static const struct rpc_call_ops nfs4_lock_ops = {
6137 .rpc_call_prepare = nfs4_lock_prepare,
6138 .rpc_call_done = nfs4_lock_done,
6139 .rpc_release = nfs4_lock_release,
6142 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6145 case -NFS4ERR_ADMIN_REVOKED:
6146 case -NFS4ERR_EXPIRED:
6147 case -NFS4ERR_BAD_STATEID:
6148 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6149 if (new_lock_owner != 0 ||
6150 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6151 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6153 case -NFS4ERR_STALE_STATEID:
6154 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6155 nfs4_schedule_lease_recovery(server->nfs_client);
6159 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6161 struct nfs4_lockdata *data;
6162 struct rpc_task *task;
6163 struct rpc_message msg = {
6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6165 .rpc_cred = state->owner->so_cred,
6167 struct rpc_task_setup task_setup_data = {
6168 .rpc_client = NFS_CLIENT(state->inode),
6169 .rpc_message = &msg,
6170 .callback_ops = &nfs4_lock_ops,
6171 .workqueue = nfsiod_workqueue,
6172 .flags = RPC_TASK_ASYNC,
6176 dprintk("%s: begin!\n", __func__);
6177 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6178 fl->fl_u.nfs4_fl.owner,
6179 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6183 data->arg.block = 1;
6184 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6185 msg.rpc_argp = &data->arg;
6186 msg.rpc_resp = &data->res;
6187 task_setup_data.callback_data = data;
6188 if (recovery_type > NFS_LOCK_NEW) {
6189 if (recovery_type == NFS_LOCK_RECLAIM)
6190 data->arg.reclaim = NFS_LOCK_RECLAIM;
6191 nfs4_set_sequence_privileged(&data->arg.seq_args);
6193 data->arg.new_lock = 1;
6194 task = rpc_run_task(&task_setup_data);
6196 return PTR_ERR(task);
6197 ret = nfs4_wait_for_completion_rpc_task(task);
6199 ret = data->rpc_status;
6201 nfs4_handle_setlk_error(data->server, data->lsp,
6202 data->arg.new_lock_owner, ret);
6204 data->cancelled = 1;
6206 dprintk("%s: done, ret = %d!\n", __func__, ret);
6207 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6211 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6213 struct nfs_server *server = NFS_SERVER(state->inode);
6214 struct nfs4_exception exception = {
6215 .inode = state->inode,
6220 /* Cache the lock if possible... */
6221 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6223 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6224 if (err != -NFS4ERR_DELAY)
6226 nfs4_handle_exception(server, err, &exception);
6227 } while (exception.retry);
6231 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6233 struct nfs_server *server = NFS_SERVER(state->inode);
6234 struct nfs4_exception exception = {
6235 .inode = state->inode,
6239 err = nfs4_set_lock_state(state, request);
6242 if (!recover_lost_locks) {
6243 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6247 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6249 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6253 case -NFS4ERR_GRACE:
6254 case -NFS4ERR_DELAY:
6255 nfs4_handle_exception(server, err, &exception);
6258 } while (exception.retry);
6263 #if defined(CONFIG_NFS_V4_1)
6264 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6266 struct nfs4_lock_state *lsp;
6269 status = nfs4_set_lock_state(state, request);
6272 lsp = request->fl_u.nfs4_fl.owner;
6273 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6274 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6276 status = nfs4_lock_expired(state, request);
6281 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6283 struct nfs_inode *nfsi = NFS_I(state->inode);
6284 struct nfs4_state_owner *sp = state->owner;
6285 unsigned char fl_flags = request->fl_flags;
6288 request->fl_flags |= FL_ACCESS;
6289 status = locks_lock_inode_wait(state->inode, request);
6292 mutex_lock(&sp->so_delegreturn_mutex);
6293 down_read(&nfsi->rwsem);
6294 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6295 /* Yes: cache locks! */
6296 /* ...but avoid races with delegation recall... */
6297 request->fl_flags = fl_flags & ~FL_SLEEP;
6298 status = locks_lock_inode_wait(state->inode, request);
6299 up_read(&nfsi->rwsem);
6300 mutex_unlock(&sp->so_delegreturn_mutex);
6303 up_read(&nfsi->rwsem);
6304 mutex_unlock(&sp->so_delegreturn_mutex);
6305 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6307 request->fl_flags = fl_flags;
6311 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6313 struct nfs4_exception exception = {
6315 .inode = state->inode,
6320 err = _nfs4_proc_setlk(state, cmd, request);
6321 if (err == -NFS4ERR_DENIED)
6323 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6325 } while (exception.retry);
6329 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6330 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6333 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6334 struct file_lock *request)
6336 int status = -ERESTARTSYS;
6337 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6339 while(!signalled()) {
6340 status = nfs4_proc_setlk(state, cmd, request);
6341 if ((status != -EAGAIN) || IS_SETLK(cmd))
6343 freezable_schedule_timeout_interruptible(timeout);
6345 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6346 status = -ERESTARTSYS;
6351 #ifdef CONFIG_NFS_V4_1
6352 struct nfs4_lock_waiter {
6353 struct task_struct *task;
6354 struct inode *inode;
6355 struct nfs_lowner *owner;
6360 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6363 struct cb_notify_lock_args *cbnl = key;
6364 struct nfs4_lock_waiter *waiter = wait->private;
6365 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6366 *wowner = waiter->owner;
6368 /* Only wake if the callback was for the same owner */
6369 if (lowner->clientid != wowner->clientid ||
6370 lowner->id != wowner->id ||
6371 lowner->s_dev != wowner->s_dev)
6374 /* Make sure it's for the right inode */
6375 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6378 waiter->notified = true;
6380 /* override "private" so we can use default_wake_function */
6381 wait->private = waiter->task;
6382 ret = autoremove_wake_function(wait, mode, flags, key);
6383 wait->private = waiter;
6388 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6390 int status = -ERESTARTSYS;
6391 unsigned long flags;
6392 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6393 struct nfs_server *server = NFS_SERVER(state->inode);
6394 struct nfs_client *clp = server->nfs_client;
6395 wait_queue_head_t *q = &clp->cl_lock_waitq;
6396 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6397 .id = lsp->ls_seqid.owner_id,
6398 .s_dev = server->s_dev };
6399 struct nfs4_lock_waiter waiter = { .task = current,
6400 .inode = state->inode,
6402 .notified = false };
6405 /* Don't bother with waitqueue if we don't expect a callback */
6406 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6407 return nfs4_retry_setlk_simple(state, cmd, request);
6410 wait.private = &waiter;
6411 wait.func = nfs4_wake_lock_waiter;
6412 add_wait_queue(q, &wait);
6414 while(!signalled()) {
6415 status = nfs4_proc_setlk(state, cmd, request);
6416 if ((status != -EAGAIN) || IS_SETLK(cmd))
6419 status = -ERESTARTSYS;
6420 spin_lock_irqsave(&q->lock, flags);
6421 if (waiter.notified) {
6422 spin_unlock_irqrestore(&q->lock, flags);
6425 set_current_state(TASK_INTERRUPTIBLE);
6426 spin_unlock_irqrestore(&q->lock, flags);
6428 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6431 finish_wait(q, &wait);
6434 #else /* !CONFIG_NFS_V4_1 */
6436 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6438 return nfs4_retry_setlk_simple(state, cmd, request);
6443 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6445 struct nfs_open_context *ctx;
6446 struct nfs4_state *state;
6449 /* verify open state */
6450 ctx = nfs_file_open_context(filp);
6453 if (request->fl_start < 0 || request->fl_end < 0)
6456 if (IS_GETLK(cmd)) {
6458 return nfs4_proc_getlk(state, F_GETLK, request);
6462 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6465 if (request->fl_type == F_UNLCK) {
6467 return nfs4_proc_unlck(state, cmd, request);
6474 if ((request->fl_flags & FL_POSIX) &&
6475 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6479 * Don't rely on the VFS having checked the file open mode,
6480 * since it won't do this for flock() locks.
6482 switch (request->fl_type) {
6484 if (!(filp->f_mode & FMODE_READ))
6488 if (!(filp->f_mode & FMODE_WRITE))
6492 status = nfs4_set_lock_state(state, request);
6496 return nfs4_retry_setlk(state, cmd, request);
6499 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6501 struct nfs_server *server = NFS_SERVER(state->inode);
6504 err = nfs4_set_lock_state(state, fl);
6507 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6508 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6511 struct nfs_release_lockowner_data {
6512 struct nfs4_lock_state *lsp;
6513 struct nfs_server *server;
6514 struct nfs_release_lockowner_args args;
6515 struct nfs_release_lockowner_res res;
6516 unsigned long timestamp;
6519 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6521 struct nfs_release_lockowner_data *data = calldata;
6522 struct nfs_server *server = data->server;
6523 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6524 &data->args.seq_args, &data->res.seq_res, task);
6525 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6526 data->timestamp = jiffies;
6529 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6531 struct nfs_release_lockowner_data *data = calldata;
6532 struct nfs_server *server = data->server;
6534 nfs40_sequence_done(task, &data->res.seq_res);
6536 switch (task->tk_status) {
6538 renew_lease(server, data->timestamp);
6540 case -NFS4ERR_STALE_CLIENTID:
6541 case -NFS4ERR_EXPIRED:
6542 nfs4_schedule_lease_recovery(server->nfs_client);
6544 case -NFS4ERR_LEASE_MOVED:
6545 case -NFS4ERR_DELAY:
6546 if (nfs4_async_handle_error(task, server,
6547 NULL, NULL) == -EAGAIN)
6548 rpc_restart_call_prepare(task);
6552 static void nfs4_release_lockowner_release(void *calldata)
6554 struct nfs_release_lockowner_data *data = calldata;
6555 nfs4_free_lock_state(data->server, data->lsp);
6559 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6560 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6561 .rpc_call_done = nfs4_release_lockowner_done,
6562 .rpc_release = nfs4_release_lockowner_release,
6566 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6568 struct nfs_release_lockowner_data *data;
6569 struct rpc_message msg = {
6570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6573 if (server->nfs_client->cl_mvops->minor_version != 0)
6576 data = kmalloc(sizeof(*data), GFP_NOFS);
6580 data->server = server;
6581 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6582 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6583 data->args.lock_owner.s_dev = server->s_dev;
6585 msg.rpc_argp = &data->args;
6586 msg.rpc_resp = &data->res;
6587 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6588 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6591 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6593 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6594 struct dentry *unused, struct inode *inode,
6595 const char *key, const void *buf,
6596 size_t buflen, int flags)
6598 return nfs4_proc_set_acl(inode, buf, buflen);
6601 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6602 struct dentry *unused, struct inode *inode,
6603 const char *key, void *buf, size_t buflen)
6605 return nfs4_proc_get_acl(inode, buf, buflen);
6608 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6610 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6613 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6615 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6616 struct dentry *unused, struct inode *inode,
6617 const char *key, const void *buf,
6618 size_t buflen, int flags)
6620 if (security_ismaclabel(key))
6621 return nfs4_set_security_label(inode, buf, buflen);
6626 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6627 struct dentry *unused, struct inode *inode,
6628 const char *key, void *buf, size_t buflen)
6630 if (security_ismaclabel(key))
6631 return nfs4_get_security_label(inode, buf, buflen);
6636 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6640 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6641 len = security_inode_listsecurity(inode, list, list_len);
6642 if (list_len && len > list_len)
6648 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6649 .prefix = XATTR_SECURITY_PREFIX,
6650 .get = nfs4_xattr_get_nfs4_label,
6651 .set = nfs4_xattr_set_nfs4_label,
6657 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6665 * nfs_fhget will use either the mounted_on_fileid or the fileid
6667 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6669 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6670 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6671 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6672 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6675 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6676 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6677 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6681 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6682 const struct qstr *name,
6683 struct nfs4_fs_locations *fs_locations,
6686 struct nfs_server *server = NFS_SERVER(dir);
6688 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6690 struct nfs4_fs_locations_arg args = {
6691 .dir_fh = NFS_FH(dir),
6696 struct nfs4_fs_locations_res res = {
6697 .fs_locations = fs_locations,
6699 struct rpc_message msg = {
6700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6706 dprintk("%s: start\n", __func__);
6708 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6709 * is not supported */
6710 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6711 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6713 bitmask[0] |= FATTR4_WORD0_FILEID;
6715 nfs_fattr_init(&fs_locations->fattr);
6716 fs_locations->server = server;
6717 fs_locations->nlocations = 0;
6718 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6719 dprintk("%s: returned status = %d\n", __func__, status);
6723 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6724 const struct qstr *name,
6725 struct nfs4_fs_locations *fs_locations,
6728 struct nfs4_exception exception = { };
6731 err = _nfs4_proc_fs_locations(client, dir, name,
6732 fs_locations, page);
6733 trace_nfs4_get_fs_locations(dir, name, err);
6734 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6736 } while (exception.retry);
6741 * This operation also signals the server that this client is
6742 * performing migration recovery. The server can stop returning
6743 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6744 * appended to this compound to identify the client ID which is
6745 * performing recovery.
6747 static int _nfs40_proc_get_locations(struct inode *inode,
6748 struct nfs4_fs_locations *locations,
6749 struct page *page, struct rpc_cred *cred)
6751 struct nfs_server *server = NFS_SERVER(inode);
6752 struct rpc_clnt *clnt = server->client;
6754 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6756 struct nfs4_fs_locations_arg args = {
6757 .clientid = server->nfs_client->cl_clientid,
6758 .fh = NFS_FH(inode),
6761 .migration = 1, /* skip LOOKUP */
6762 .renew = 1, /* append RENEW */
6764 struct nfs4_fs_locations_res res = {
6765 .fs_locations = locations,
6769 struct rpc_message msg = {
6770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6775 unsigned long now = jiffies;
6778 nfs_fattr_init(&locations->fattr);
6779 locations->server = server;
6780 locations->nlocations = 0;
6782 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6783 nfs4_set_sequence_privileged(&args.seq_args);
6784 status = nfs4_call_sync_sequence(clnt, server, &msg,
6785 &args.seq_args, &res.seq_res);
6789 renew_lease(server, now);
6793 #ifdef CONFIG_NFS_V4_1
6796 * This operation also signals the server that this client is
6797 * performing migration recovery. The server can stop asserting
6798 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6799 * performing this operation is identified in the SEQUENCE
6800 * operation in this compound.
6802 * When the client supports GETATTR(fs_locations_info), it can
6803 * be plumbed in here.
6805 static int _nfs41_proc_get_locations(struct inode *inode,
6806 struct nfs4_fs_locations *locations,
6807 struct page *page, struct rpc_cred *cred)
6809 struct nfs_server *server = NFS_SERVER(inode);
6810 struct rpc_clnt *clnt = server->client;
6812 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6814 struct nfs4_fs_locations_arg args = {
6815 .fh = NFS_FH(inode),
6818 .migration = 1, /* skip LOOKUP */
6820 struct nfs4_fs_locations_res res = {
6821 .fs_locations = locations,
6824 struct rpc_message msg = {
6825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6832 nfs_fattr_init(&locations->fattr);
6833 locations->server = server;
6834 locations->nlocations = 0;
6836 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6837 nfs4_set_sequence_privileged(&args.seq_args);
6838 status = nfs4_call_sync_sequence(clnt, server, &msg,
6839 &args.seq_args, &res.seq_res);
6840 if (status == NFS4_OK &&
6841 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6842 status = -NFS4ERR_LEASE_MOVED;
6846 #endif /* CONFIG_NFS_V4_1 */
6849 * nfs4_proc_get_locations - discover locations for a migrated FSID
6850 * @inode: inode on FSID that is migrating
6851 * @locations: result of query
6853 * @cred: credential to use for this operation
6855 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6856 * operation failed, or a negative errno if a local error occurred.
6858 * On success, "locations" is filled in, but if the server has
6859 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6862 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6863 * from this client that require migration recovery.
6865 int nfs4_proc_get_locations(struct inode *inode,
6866 struct nfs4_fs_locations *locations,
6867 struct page *page, struct rpc_cred *cred)
6869 struct nfs_server *server = NFS_SERVER(inode);
6870 struct nfs_client *clp = server->nfs_client;
6871 const struct nfs4_mig_recovery_ops *ops =
6872 clp->cl_mvops->mig_recovery_ops;
6873 struct nfs4_exception exception = { };
6876 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6877 (unsigned long long)server->fsid.major,
6878 (unsigned long long)server->fsid.minor,
6880 nfs_display_fhandle(NFS_FH(inode), __func__);
6883 status = ops->get_locations(inode, locations, page, cred);
6884 if (status != -NFS4ERR_DELAY)
6886 nfs4_handle_exception(server, status, &exception);
6887 } while (exception.retry);
6892 * This operation also signals the server that this client is
6893 * performing "lease moved" recovery. The server can stop
6894 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6895 * is appended to this compound to identify the client ID which is
6896 * performing recovery.
6898 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6900 struct nfs_server *server = NFS_SERVER(inode);
6901 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6902 struct rpc_clnt *clnt = server->client;
6903 struct nfs4_fsid_present_arg args = {
6904 .fh = NFS_FH(inode),
6905 .clientid = clp->cl_clientid,
6906 .renew = 1, /* append RENEW */
6908 struct nfs4_fsid_present_res res = {
6911 struct rpc_message msg = {
6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6917 unsigned long now = jiffies;
6920 res.fh = nfs_alloc_fhandle();
6924 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6925 nfs4_set_sequence_privileged(&args.seq_args);
6926 status = nfs4_call_sync_sequence(clnt, server, &msg,
6927 &args.seq_args, &res.seq_res);
6928 nfs_free_fhandle(res.fh);
6932 do_renew_lease(clp, now);
6936 #ifdef CONFIG_NFS_V4_1
6939 * This operation also signals the server that this client is
6940 * performing "lease moved" recovery. The server can stop asserting
6941 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6942 * this operation is identified in the SEQUENCE operation in this
6945 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6947 struct nfs_server *server = NFS_SERVER(inode);
6948 struct rpc_clnt *clnt = server->client;
6949 struct nfs4_fsid_present_arg args = {
6950 .fh = NFS_FH(inode),
6952 struct nfs4_fsid_present_res res = {
6954 struct rpc_message msg = {
6955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6962 res.fh = nfs_alloc_fhandle();
6966 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6967 nfs4_set_sequence_privileged(&args.seq_args);
6968 status = nfs4_call_sync_sequence(clnt, server, &msg,
6969 &args.seq_args, &res.seq_res);
6970 nfs_free_fhandle(res.fh);
6971 if (status == NFS4_OK &&
6972 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6973 status = -NFS4ERR_LEASE_MOVED;
6977 #endif /* CONFIG_NFS_V4_1 */
6980 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6981 * @inode: inode on FSID to check
6982 * @cred: credential to use for this operation
6984 * Server indicates whether the FSID is present, moved, or not
6985 * recognized. This operation is necessary to clear a LEASE_MOVED
6986 * condition for this client ID.
6988 * Returns NFS4_OK if the FSID is present on this server,
6989 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6990 * NFS4ERR code if some error occurred on the server, or a
6991 * negative errno if a local failure occurred.
6993 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6995 struct nfs_server *server = NFS_SERVER(inode);
6996 struct nfs_client *clp = server->nfs_client;
6997 const struct nfs4_mig_recovery_ops *ops =
6998 clp->cl_mvops->mig_recovery_ops;
6999 struct nfs4_exception exception = { };
7002 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7003 (unsigned long long)server->fsid.major,
7004 (unsigned long long)server->fsid.minor,
7006 nfs_display_fhandle(NFS_FH(inode), __func__);
7009 status = ops->fsid_present(inode, cred);
7010 if (status != -NFS4ERR_DELAY)
7012 nfs4_handle_exception(server, status, &exception);
7013 } while (exception.retry);
7018 * If 'use_integrity' is true and the state managment nfs_client
7019 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7020 * and the machine credential as per RFC3530bis and RFC5661 Security
7021 * Considerations sections. Otherwise, just use the user cred with the
7022 * filesystem's rpc_client.
7024 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7027 struct nfs4_secinfo_arg args = {
7028 .dir_fh = NFS_FH(dir),
7031 struct nfs4_secinfo_res res = {
7034 struct rpc_message msg = {
7035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7039 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7040 struct rpc_cred *cred = NULL;
7042 if (use_integrity) {
7043 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7044 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7045 msg.rpc_cred = cred;
7048 dprintk("NFS call secinfo %s\n", name->name);
7050 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7051 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7053 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7055 dprintk("NFS reply secinfo: %d\n", status);
7063 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7064 struct nfs4_secinfo_flavors *flavors)
7066 struct nfs4_exception exception = { };
7069 err = -NFS4ERR_WRONGSEC;
7071 /* try to use integrity protection with machine cred */
7072 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7073 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7076 * if unable to use integrity protection, or SECINFO with
7077 * integrity protection returns NFS4ERR_WRONGSEC (which is
7078 * disallowed by spec, but exists in deployed servers) use
7079 * the current filesystem's rpc_client and the user cred.
7081 if (err == -NFS4ERR_WRONGSEC)
7082 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7084 trace_nfs4_secinfo(dir, name, err);
7085 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7087 } while (exception.retry);
7091 #ifdef CONFIG_NFS_V4_1
7093 * Check the exchange flags returned by the server for invalid flags, having
7094 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7097 static int nfs4_check_cl_exchange_flags(u32 flags)
7099 if (flags & ~EXCHGID4_FLAG_MASK_R)
7101 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7102 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7104 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7108 return -NFS4ERR_INVAL;
7112 nfs41_same_server_scope(struct nfs41_server_scope *a,
7113 struct nfs41_server_scope *b)
7115 if (a->server_scope_sz == b->server_scope_sz &&
7116 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7123 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7127 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7128 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7132 * nfs4_proc_bind_one_conn_to_session()
7134 * The 4.1 client currently uses the same TCP connection for the
7135 * fore and backchannel.
7138 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7139 struct rpc_xprt *xprt,
7140 struct nfs_client *clp,
7141 struct rpc_cred *cred)
7144 struct nfs41_bind_conn_to_session_args args = {
7146 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7148 struct nfs41_bind_conn_to_session_res res;
7149 struct rpc_message msg = {
7151 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7156 struct rpc_task_setup task_setup_data = {
7159 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7160 .rpc_message = &msg,
7161 .flags = RPC_TASK_TIMEOUT,
7163 struct rpc_task *task;
7165 dprintk("--> %s\n", __func__);
7167 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7168 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7169 args.dir = NFS4_CDFC4_FORE;
7171 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7172 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7173 args.dir = NFS4_CDFC4_FORE;
7175 task = rpc_run_task(&task_setup_data);
7176 if (!IS_ERR(task)) {
7177 status = task->tk_status;
7180 status = PTR_ERR(task);
7181 trace_nfs4_bind_conn_to_session(clp, status);
7183 if (memcmp(res.sessionid.data,
7184 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7185 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7189 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7190 dprintk("NFS: %s: Unexpected direction from server\n",
7195 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7196 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7203 dprintk("<-- %s status= %d\n", __func__, status);
7207 struct rpc_bind_conn_calldata {
7208 struct nfs_client *clp;
7209 struct rpc_cred *cred;
7213 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7214 struct rpc_xprt *xprt,
7217 struct rpc_bind_conn_calldata *p = calldata;
7219 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7222 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7224 struct rpc_bind_conn_calldata data = {
7228 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7229 nfs4_proc_bind_conn_to_session_callback, &data);
7233 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7234 * and operations we'd like to see to enable certain features in the allow map
7236 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7237 .how = SP4_MACH_CRED,
7238 .enforce.u.words = {
7239 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7240 1 << (OP_EXCHANGE_ID - 32) |
7241 1 << (OP_CREATE_SESSION - 32) |
7242 1 << (OP_DESTROY_SESSION - 32) |
7243 1 << (OP_DESTROY_CLIENTID - 32)
7246 [0] = 1 << (OP_CLOSE) |
7247 1 << (OP_OPEN_DOWNGRADE) |
7249 1 << (OP_DELEGRETURN) |
7251 [1] = 1 << (OP_SECINFO - 32) |
7252 1 << (OP_SECINFO_NO_NAME - 32) |
7253 1 << (OP_LAYOUTRETURN - 32) |
7254 1 << (OP_TEST_STATEID - 32) |
7255 1 << (OP_FREE_STATEID - 32) |
7256 1 << (OP_WRITE - 32)
7261 * Select the state protection mode for client `clp' given the server results
7262 * from exchange_id in `sp'.
7264 * Returns 0 on success, negative errno otherwise.
7266 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7267 struct nfs41_state_protection *sp)
7269 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7270 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7271 1 << (OP_EXCHANGE_ID - 32) |
7272 1 << (OP_CREATE_SESSION - 32) |
7273 1 << (OP_DESTROY_SESSION - 32) |
7274 1 << (OP_DESTROY_CLIENTID - 32)
7278 if (sp->how == SP4_MACH_CRED) {
7279 /* Print state protect result */
7280 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7281 for (i = 0; i <= LAST_NFS4_OP; i++) {
7282 if (test_bit(i, sp->enforce.u.longs))
7283 dfprintk(MOUNT, " enforce op %d\n", i);
7284 if (test_bit(i, sp->allow.u.longs))
7285 dfprintk(MOUNT, " allow op %d\n", i);
7288 /* make sure nothing is on enforce list that isn't supported */
7289 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7290 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7291 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7297 * Minimal mode - state operations are allowed to use machine
7298 * credential. Note this already happens by default, so the
7299 * client doesn't have to do anything more than the negotiation.
7301 * NOTE: we don't care if EXCHANGE_ID is in the list -
7302 * we're already using the machine cred for exchange_id
7303 * and will never use a different cred.
7305 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7306 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7307 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7308 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7309 dfprintk(MOUNT, "sp4_mach_cred:\n");
7310 dfprintk(MOUNT, " minimal mode enabled\n");
7311 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7313 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7317 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7318 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7319 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7320 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7321 dfprintk(MOUNT, " cleanup mode enabled\n");
7322 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7325 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7326 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7327 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7328 &clp->cl_sp4_flags);
7331 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7332 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7333 dfprintk(MOUNT, " secinfo mode enabled\n");
7334 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7337 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7338 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7339 dfprintk(MOUNT, " stateid mode enabled\n");
7340 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7343 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7344 dfprintk(MOUNT, " write mode enabled\n");
7345 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7348 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7349 dfprintk(MOUNT, " commit mode enabled\n");
7350 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7357 struct nfs41_exchange_id_data {
7358 struct nfs41_exchange_id_res res;
7359 struct nfs41_exchange_id_args args;
7360 struct rpc_xprt *xprt;
7364 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7366 struct nfs41_exchange_id_data *cdata =
7367 (struct nfs41_exchange_id_data *)data;
7368 struct nfs_client *clp = cdata->args.client;
7369 int status = task->tk_status;
7371 trace_nfs4_exchange_id(clp, status);
7374 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7376 if (cdata->xprt && status == 0) {
7377 status = nfs4_detect_session_trunking(clp, &cdata->res,
7383 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7386 clp->cl_clientid = cdata->res.clientid;
7387 clp->cl_exchange_flags = cdata->res.flags;
7388 /* Client ID is not confirmed */
7389 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7390 clear_bit(NFS4_SESSION_ESTABLISHED,
7391 &clp->cl_session->session_state);
7392 clp->cl_seqid = cdata->res.seqid;
7395 kfree(clp->cl_serverowner);
7396 clp->cl_serverowner = cdata->res.server_owner;
7397 cdata->res.server_owner = NULL;
7399 /* use the most recent implementation id */
7400 kfree(clp->cl_implid);
7401 clp->cl_implid = cdata->res.impl_id;
7402 cdata->res.impl_id = NULL;
7404 if (clp->cl_serverscope != NULL &&
7405 !nfs41_same_server_scope(clp->cl_serverscope,
7406 cdata->res.server_scope)) {
7407 dprintk("%s: server_scope mismatch detected\n",
7409 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7410 kfree(clp->cl_serverscope);
7411 clp->cl_serverscope = NULL;
7414 if (clp->cl_serverscope == NULL) {
7415 clp->cl_serverscope = cdata->res.server_scope;
7416 cdata->res.server_scope = NULL;
7418 /* Save the EXCHANGE_ID verifier session trunk tests */
7419 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7420 sizeof(clp->cl_confirm.data));
7423 cdata->rpc_status = status;
7427 static void nfs4_exchange_id_release(void *data)
7429 struct nfs41_exchange_id_data *cdata =
7430 (struct nfs41_exchange_id_data *)data;
7432 nfs_put_client(cdata->args.client);
7434 xprt_put(cdata->xprt);
7435 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7437 kfree(cdata->res.impl_id);
7438 kfree(cdata->res.server_scope);
7439 kfree(cdata->res.server_owner);
7443 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7444 .rpc_call_done = nfs4_exchange_id_done,
7445 .rpc_release = nfs4_exchange_id_release,
7449 * _nfs4_proc_exchange_id()
7451 * Wrapper for EXCHANGE_ID operation.
7453 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7454 u32 sp4_how, struct rpc_xprt *xprt)
7456 nfs4_verifier verifier;
7457 struct rpc_message msg = {
7458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7461 struct rpc_task_setup task_setup_data = {
7462 .rpc_client = clp->cl_rpcclient,
7463 .callback_ops = &nfs4_exchange_id_call_ops,
7464 .rpc_message = &msg,
7465 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7467 struct nfs41_exchange_id_data *calldata;
7468 struct rpc_task *task;
7471 if (!atomic_inc_not_zero(&clp->cl_count))
7475 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7480 nfs4_init_boot_verifier(clp, &verifier);
7482 status = nfs4_init_uniform_client_string(clp);
7486 dprintk("NFS call exchange_id auth=%s, '%s'\n",
7487 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7490 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7493 if (unlikely(calldata->res.server_owner == NULL))
7496 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7498 if (unlikely(calldata->res.server_scope == NULL))
7499 goto out_server_owner;
7501 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7502 if (unlikely(calldata->res.impl_id == NULL))
7503 goto out_server_scope;
7507 calldata->args.state_protect.how = SP4_NONE;
7511 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7521 calldata->xprt = xprt;
7522 task_setup_data.rpc_xprt = xprt;
7523 task_setup_data.flags =
7524 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7525 calldata->args.verifier = &clp->cl_confirm;
7527 calldata->args.verifier = &verifier;
7529 calldata->args.client = clp;
7530 #ifdef CONFIG_NFS_V4_1_MIGRATION
7531 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7532 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7533 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7535 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7536 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7538 msg.rpc_argp = &calldata->args;
7539 msg.rpc_resp = &calldata->res;
7540 task_setup_data.callback_data = calldata;
7542 task = rpc_run_task(&task_setup_data);
7544 status = PTR_ERR(task);
7549 status = rpc_wait_for_completion_task(task);
7551 status = calldata->rpc_status;
7552 } else /* session trunking test */
7553 status = calldata->rpc_status;
7557 if (clp->cl_implid != NULL)
7558 dprintk("NFS reply exchange_id: Server Implementation ID: "
7559 "domain: %s, name: %s, date: %llu,%u\n",
7560 clp->cl_implid->domain, clp->cl_implid->name,
7561 clp->cl_implid->date.seconds,
7562 clp->cl_implid->date.nseconds);
7563 dprintk("NFS reply exchange_id: %d\n", status);
7567 kfree(calldata->res.impl_id);
7569 kfree(calldata->res.server_scope);
7571 kfree(calldata->res.server_owner);
7578 * nfs4_proc_exchange_id()
7580 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7582 * Since the clientid has expired, all compounds using sessions
7583 * associated with the stale clientid will be returning
7584 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7585 * be in some phase of session reset.
7587 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7589 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7591 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7594 /* try SP4_MACH_CRED if krb5i/p */
7595 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7596 authflavor == RPC_AUTH_GSS_KRB5P) {
7597 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7603 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7607 * nfs4_test_session_trunk
7609 * This is an add_xprt_test() test function called from
7610 * rpc_clnt_setup_test_and_add_xprt.
7612 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7613 * and is dereferrenced in nfs4_exchange_id_release
7615 * Upon success, add the new transport to the rpc_clnt
7617 * @clnt: struct rpc_clnt to get new transport
7618 * @xprt: the rpc_xprt to test
7619 * @data: call data for _nfs4_proc_exchange_id.
7621 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7624 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7627 dprintk("--> %s try %s\n", __func__,
7628 xprt->address_strings[RPC_DISPLAY_ADDR]);
7630 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7632 /* Test connection for session trunking. Async exchange_id call */
7633 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7635 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7637 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7638 struct rpc_cred *cred)
7640 struct rpc_message msg = {
7641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7647 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7648 trace_nfs4_destroy_clientid(clp, status);
7650 dprintk("NFS: Got error %d from the server %s on "
7651 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7655 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7656 struct rpc_cred *cred)
7661 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7662 ret = _nfs4_proc_destroy_clientid(clp, cred);
7664 case -NFS4ERR_DELAY:
7665 case -NFS4ERR_CLIENTID_BUSY:
7675 int nfs4_destroy_clientid(struct nfs_client *clp)
7677 struct rpc_cred *cred;
7680 if (clp->cl_mvops->minor_version < 1)
7682 if (clp->cl_exchange_flags == 0)
7684 if (clp->cl_preserve_clid)
7686 cred = nfs4_get_clid_cred(clp);
7687 ret = nfs4_proc_destroy_clientid(clp, cred);
7692 case -NFS4ERR_STALE_CLIENTID:
7693 clp->cl_exchange_flags = 0;
7699 struct nfs4_get_lease_time_data {
7700 struct nfs4_get_lease_time_args *args;
7701 struct nfs4_get_lease_time_res *res;
7702 struct nfs_client *clp;
7705 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7708 struct nfs4_get_lease_time_data *data =
7709 (struct nfs4_get_lease_time_data *)calldata;
7711 dprintk("--> %s\n", __func__);
7712 /* just setup sequence, do not trigger session recovery
7713 since we're invoked within one */
7714 nfs41_setup_sequence(data->clp->cl_session,
7715 &data->args->la_seq_args,
7716 &data->res->lr_seq_res,
7718 dprintk("<-- %s\n", __func__);
7722 * Called from nfs4_state_manager thread for session setup, so don't recover
7723 * from sequence operation or clientid errors.
7725 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7727 struct nfs4_get_lease_time_data *data =
7728 (struct nfs4_get_lease_time_data *)calldata;
7730 dprintk("--> %s\n", __func__);
7731 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7733 switch (task->tk_status) {
7734 case -NFS4ERR_DELAY:
7735 case -NFS4ERR_GRACE:
7736 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7737 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7738 task->tk_status = 0;
7740 case -NFS4ERR_RETRY_UNCACHED_REP:
7741 rpc_restart_call_prepare(task);
7744 dprintk("<-- %s\n", __func__);
7747 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7748 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7749 .rpc_call_done = nfs4_get_lease_time_done,
7752 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7754 struct rpc_task *task;
7755 struct nfs4_get_lease_time_args args;
7756 struct nfs4_get_lease_time_res res = {
7757 .lr_fsinfo = fsinfo,
7759 struct nfs4_get_lease_time_data data = {
7764 struct rpc_message msg = {
7765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7769 struct rpc_task_setup task_setup = {
7770 .rpc_client = clp->cl_rpcclient,
7771 .rpc_message = &msg,
7772 .callback_ops = &nfs4_get_lease_time_ops,
7773 .callback_data = &data,
7774 .flags = RPC_TASK_TIMEOUT,
7778 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7779 nfs4_set_sequence_privileged(&args.la_seq_args);
7780 dprintk("--> %s\n", __func__);
7781 task = rpc_run_task(&task_setup);
7784 status = PTR_ERR(task);
7786 status = task->tk_status;
7789 dprintk("<-- %s return %d\n", __func__, status);
7795 * Initialize the values to be used by the client in CREATE_SESSION
7796 * If nfs4_init_session set the fore channel request and response sizes,
7799 * Set the back channel max_resp_sz_cached to zero to force the client to
7800 * always set csa_cachethis to FALSE because the current implementation
7801 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7803 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7804 struct rpc_clnt *clnt)
7806 unsigned int max_rqst_sz, max_resp_sz;
7807 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7809 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7810 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7812 /* Fore channel attributes */
7813 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7814 args->fc_attrs.max_resp_sz = max_resp_sz;
7815 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7816 args->fc_attrs.max_reqs = max_session_slots;
7818 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7819 "max_ops=%u max_reqs=%u\n",
7821 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7822 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7824 /* Back channel attributes */
7825 args->bc_attrs.max_rqst_sz = max_bc_payload;
7826 args->bc_attrs.max_resp_sz = max_bc_payload;
7827 args->bc_attrs.max_resp_sz_cached = 0;
7828 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7829 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7831 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7832 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7834 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7835 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7836 args->bc_attrs.max_reqs);
7839 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7840 struct nfs41_create_session_res *res)
7842 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7843 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7845 if (rcvd->max_resp_sz > sent->max_resp_sz)
7848 * Our requested max_ops is the minimum we need; we're not
7849 * prepared to break up compounds into smaller pieces than that.
7850 * So, no point even trying to continue if the server won't
7853 if (rcvd->max_ops < sent->max_ops)
7855 if (rcvd->max_reqs == 0)
7857 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7858 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7862 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7863 struct nfs41_create_session_res *res)
7865 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7866 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7868 if (!(res->flags & SESSION4_BACK_CHAN))
7870 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7872 if (rcvd->max_resp_sz < sent->max_resp_sz)
7874 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7876 if (rcvd->max_ops > sent->max_ops)
7878 if (rcvd->max_reqs > sent->max_reqs)
7884 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7885 struct nfs41_create_session_res *res)
7889 ret = nfs4_verify_fore_channel_attrs(args, res);
7892 return nfs4_verify_back_channel_attrs(args, res);
7895 static void nfs4_update_session(struct nfs4_session *session,
7896 struct nfs41_create_session_res *res)
7898 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7899 /* Mark client id and session as being confirmed */
7900 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7901 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7902 session->flags = res->flags;
7903 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7904 if (res->flags & SESSION4_BACK_CHAN)
7905 memcpy(&session->bc_attrs, &res->bc_attrs,
7906 sizeof(session->bc_attrs));
7909 static int _nfs4_proc_create_session(struct nfs_client *clp,
7910 struct rpc_cred *cred)
7912 struct nfs4_session *session = clp->cl_session;
7913 struct nfs41_create_session_args args = {
7915 .clientid = clp->cl_clientid,
7916 .seqid = clp->cl_seqid,
7917 .cb_program = NFS4_CALLBACK,
7919 struct nfs41_create_session_res res;
7921 struct rpc_message msg = {
7922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7929 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7930 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7932 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7933 trace_nfs4_create_session(clp, status);
7936 case -NFS4ERR_STALE_CLIENTID:
7937 case -NFS4ERR_DELAY:
7946 /* Verify the session's negotiated channel_attrs values */
7947 status = nfs4_verify_channel_attrs(&args, &res);
7948 /* Increment the clientid slot sequence id */
7951 nfs4_update_session(session, &res);
7958 * Issues a CREATE_SESSION operation to the server.
7959 * It is the responsibility of the caller to verify the session is
7960 * expired before calling this routine.
7962 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7966 struct nfs4_session *session = clp->cl_session;
7968 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7970 status = _nfs4_proc_create_session(clp, cred);
7974 /* Init or reset the session slot tables */
7975 status = nfs4_setup_session_slot_tables(session);
7976 dprintk("slot table setup returned %d\n", status);
7980 ptr = (unsigned *)&session->sess_id.data[0];
7981 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7982 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7984 dprintk("<-- %s\n", __func__);
7989 * Issue the over-the-wire RPC DESTROY_SESSION.
7990 * The caller must serialize access to this routine.
7992 int nfs4_proc_destroy_session(struct nfs4_session *session,
7993 struct rpc_cred *cred)
7995 struct rpc_message msg = {
7996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7997 .rpc_argp = session,
8002 dprintk("--> nfs4_proc_destroy_session\n");
8004 /* session is still being setup */
8005 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8009 trace_nfs4_destroy_session(session->clp, status);
8012 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8013 "Session has been destroyed regardless...\n", status);
8015 dprintk("<-- nfs4_proc_destroy_session\n");
8020 * Renew the cl_session lease.
8022 struct nfs4_sequence_data {
8023 struct nfs_client *clp;
8024 struct nfs4_sequence_args args;
8025 struct nfs4_sequence_res res;
8028 static void nfs41_sequence_release(void *data)
8030 struct nfs4_sequence_data *calldata = data;
8031 struct nfs_client *clp = calldata->clp;
8033 if (atomic_read(&clp->cl_count) > 1)
8034 nfs4_schedule_state_renewal(clp);
8035 nfs_put_client(clp);
8039 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8041 switch(task->tk_status) {
8042 case -NFS4ERR_DELAY:
8043 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8046 nfs4_schedule_lease_recovery(clp);
8051 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8053 struct nfs4_sequence_data *calldata = data;
8054 struct nfs_client *clp = calldata->clp;
8056 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8059 trace_nfs4_sequence(clp, task->tk_status);
8060 if (task->tk_status < 0) {
8061 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8062 if (atomic_read(&clp->cl_count) == 1)
8065 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8066 rpc_restart_call_prepare(task);
8070 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8072 dprintk("<-- %s\n", __func__);
8075 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8077 struct nfs4_sequence_data *calldata = data;
8078 struct nfs_client *clp = calldata->clp;
8079 struct nfs4_sequence_args *args;
8080 struct nfs4_sequence_res *res;
8082 args = task->tk_msg.rpc_argp;
8083 res = task->tk_msg.rpc_resp;
8085 nfs41_setup_sequence(clp->cl_session, args, res, task);
8088 static const struct rpc_call_ops nfs41_sequence_ops = {
8089 .rpc_call_done = nfs41_sequence_call_done,
8090 .rpc_call_prepare = nfs41_sequence_prepare,
8091 .rpc_release = nfs41_sequence_release,
8094 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8095 struct rpc_cred *cred,
8098 struct nfs4_sequence_data *calldata;
8099 struct rpc_message msg = {
8100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8103 struct rpc_task_setup task_setup_data = {
8104 .rpc_client = clp->cl_rpcclient,
8105 .rpc_message = &msg,
8106 .callback_ops = &nfs41_sequence_ops,
8107 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8110 if (!atomic_inc_not_zero(&clp->cl_count))
8111 return ERR_PTR(-EIO);
8112 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8113 if (calldata == NULL) {
8114 nfs_put_client(clp);
8115 return ERR_PTR(-ENOMEM);
8117 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8119 nfs4_set_sequence_privileged(&calldata->args);
8120 msg.rpc_argp = &calldata->args;
8121 msg.rpc_resp = &calldata->res;
8122 calldata->clp = clp;
8123 task_setup_data.callback_data = calldata;
8125 return rpc_run_task(&task_setup_data);
8128 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8130 struct rpc_task *task;
8133 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8135 task = _nfs41_proc_sequence(clp, cred, false);
8137 ret = PTR_ERR(task);
8139 rpc_put_task_async(task);
8140 dprintk("<-- %s status=%d\n", __func__, ret);
8144 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8146 struct rpc_task *task;
8149 task = _nfs41_proc_sequence(clp, cred, true);
8151 ret = PTR_ERR(task);
8154 ret = rpc_wait_for_completion_task(task);
8156 ret = task->tk_status;
8159 dprintk("<-- %s status=%d\n", __func__, ret);
8163 struct nfs4_reclaim_complete_data {
8164 struct nfs_client *clp;
8165 struct nfs41_reclaim_complete_args arg;
8166 struct nfs41_reclaim_complete_res res;
8169 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8171 struct nfs4_reclaim_complete_data *calldata = data;
8173 nfs41_setup_sequence(calldata->clp->cl_session,
8174 &calldata->arg.seq_args,
8175 &calldata->res.seq_res,
8179 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8181 switch(task->tk_status) {
8183 case -NFS4ERR_COMPLETE_ALREADY:
8184 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8186 case -NFS4ERR_DELAY:
8187 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8189 case -NFS4ERR_RETRY_UNCACHED_REP:
8192 nfs4_schedule_lease_recovery(clp);
8197 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8199 struct nfs4_reclaim_complete_data *calldata = data;
8200 struct nfs_client *clp = calldata->clp;
8201 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8203 dprintk("--> %s\n", __func__);
8204 if (!nfs41_sequence_done(task, res))
8207 trace_nfs4_reclaim_complete(clp, task->tk_status);
8208 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8209 rpc_restart_call_prepare(task);
8212 dprintk("<-- %s\n", __func__);
8215 static void nfs4_free_reclaim_complete_data(void *data)
8217 struct nfs4_reclaim_complete_data *calldata = data;
8222 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8223 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8224 .rpc_call_done = nfs4_reclaim_complete_done,
8225 .rpc_release = nfs4_free_reclaim_complete_data,
8229 * Issue a global reclaim complete.
8231 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8232 struct rpc_cred *cred)
8234 struct nfs4_reclaim_complete_data *calldata;
8235 struct rpc_task *task;
8236 struct rpc_message msg = {
8237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8240 struct rpc_task_setup task_setup_data = {
8241 .rpc_client = clp->cl_rpcclient,
8242 .rpc_message = &msg,
8243 .callback_ops = &nfs4_reclaim_complete_call_ops,
8244 .flags = RPC_TASK_ASYNC,
8246 int status = -ENOMEM;
8248 dprintk("--> %s\n", __func__);
8249 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8250 if (calldata == NULL)
8252 calldata->clp = clp;
8253 calldata->arg.one_fs = 0;
8255 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8256 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8257 msg.rpc_argp = &calldata->arg;
8258 msg.rpc_resp = &calldata->res;
8259 task_setup_data.callback_data = calldata;
8260 task = rpc_run_task(&task_setup_data);
8262 status = PTR_ERR(task);
8265 status = nfs4_wait_for_completion_rpc_task(task);
8267 status = task->tk_status;
8271 dprintk("<-- %s status=%d\n", __func__, status);
8276 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8278 struct nfs4_layoutget *lgp = calldata;
8279 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8280 struct nfs4_session *session = nfs4_get_session(server);
8282 dprintk("--> %s\n", __func__);
8283 nfs41_setup_sequence(session, &lgp->args.seq_args,
8284 &lgp->res.seq_res, task);
8285 dprintk("<-- %s\n", __func__);
8288 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8290 struct nfs4_layoutget *lgp = calldata;
8292 dprintk("--> %s\n", __func__);
8293 nfs41_sequence_process(task, &lgp->res.seq_res);
8294 dprintk("<-- %s\n", __func__);
8298 nfs4_layoutget_handle_exception(struct rpc_task *task,
8299 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8301 struct inode *inode = lgp->args.inode;
8302 struct nfs_server *server = NFS_SERVER(inode);
8303 struct pnfs_layout_hdr *lo;
8304 int nfs4err = task->tk_status;
8305 int err, status = 0;
8308 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8315 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8316 * on the file. set tk_status to -ENODATA to tell upper layer to
8319 case -NFS4ERR_LAYOUTUNAVAILABLE:
8323 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8324 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8326 case -NFS4ERR_BADLAYOUT:
8327 status = -EOVERFLOW;
8330 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8331 * (or clients) writing to the same RAID stripe except when
8332 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8334 * Treat it like we would RECALLCONFLICT -- we retry for a little
8335 * while, and then eventually give up.
8337 case -NFS4ERR_LAYOUTTRYLATER:
8338 if (lgp->args.minlength == 0) {
8339 status = -EOVERFLOW;
8344 case -NFS4ERR_RECALLCONFLICT:
8345 status = -ERECALLCONFLICT;
8347 case -NFS4ERR_DELEG_REVOKED:
8348 case -NFS4ERR_ADMIN_REVOKED:
8349 case -NFS4ERR_EXPIRED:
8350 case -NFS4ERR_BAD_STATEID:
8351 exception->timeout = 0;
8352 spin_lock(&inode->i_lock);
8353 lo = NFS_I(inode)->layout;
8354 /* If the open stateid was bad, then recover it. */
8355 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8356 nfs4_stateid_match_other(&lgp->args.stateid,
8357 &lgp->args.ctx->state->stateid)) {
8358 spin_unlock(&inode->i_lock);
8359 exception->state = lgp->args.ctx->state;
8360 exception->stateid = &lgp->args.stateid;
8365 * Mark the bad layout state as invalid, then retry
8367 pnfs_mark_layout_stateid_invalid(lo, &head);
8368 spin_unlock(&inode->i_lock);
8369 pnfs_free_lseg_list(&head);
8374 err = nfs4_handle_exception(server, nfs4err, exception);
8376 if (exception->retry)
8382 dprintk("<-- %s\n", __func__);
8386 static size_t max_response_pages(struct nfs_server *server)
8388 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8389 return nfs_page_array_len(0, max_resp_sz);
8392 static void nfs4_free_pages(struct page **pages, size_t size)
8399 for (i = 0; i < size; i++) {
8402 __free_page(pages[i]);
8407 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8409 struct page **pages;
8412 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8414 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8418 for (i = 0; i < size; i++) {
8419 pages[i] = alloc_page(gfp_flags);
8421 dprintk("%s: failed to allocate page\n", __func__);
8422 nfs4_free_pages(pages, size);
8430 static void nfs4_layoutget_release(void *calldata)
8432 struct nfs4_layoutget *lgp = calldata;
8433 struct inode *inode = lgp->args.inode;
8434 struct nfs_server *server = NFS_SERVER(inode);
8435 size_t max_pages = max_response_pages(server);
8437 dprintk("--> %s\n", __func__);
8438 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8439 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8440 put_nfs_open_context(lgp->args.ctx);
8442 dprintk("<-- %s\n", __func__);
8445 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8446 .rpc_call_prepare = nfs4_layoutget_prepare,
8447 .rpc_call_done = nfs4_layoutget_done,
8448 .rpc_release = nfs4_layoutget_release,
8451 struct pnfs_layout_segment *
8452 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8454 struct inode *inode = lgp->args.inode;
8455 struct nfs_server *server = NFS_SERVER(inode);
8456 size_t max_pages = max_response_pages(server);
8457 struct rpc_task *task;
8458 struct rpc_message msg = {
8459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8460 .rpc_argp = &lgp->args,
8461 .rpc_resp = &lgp->res,
8462 .rpc_cred = lgp->cred,
8464 struct rpc_task_setup task_setup_data = {
8465 .rpc_client = server->client,
8466 .rpc_message = &msg,
8467 .callback_ops = &nfs4_layoutget_call_ops,
8468 .callback_data = lgp,
8469 .flags = RPC_TASK_ASYNC,
8471 struct pnfs_layout_segment *lseg = NULL;
8472 struct nfs4_exception exception = {
8474 .timeout = *timeout,
8478 dprintk("--> %s\n", __func__);
8480 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8481 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8483 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8484 if (!lgp->args.layout.pages) {
8485 nfs4_layoutget_release(lgp);
8486 return ERR_PTR(-ENOMEM);
8488 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8490 lgp->res.layoutp = &lgp->args.layout;
8491 lgp->res.seq_res.sr_slot = NULL;
8492 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8494 task = rpc_run_task(&task_setup_data);
8496 return ERR_CAST(task);
8497 status = nfs4_wait_for_completion_rpc_task(task);
8499 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8500 *timeout = exception.timeout;
8503 trace_nfs4_layoutget(lgp->args.ctx,
8509 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8510 if (status == 0 && lgp->res.layoutp->len)
8511 lseg = pnfs_layout_process(lgp);
8512 nfs4_sequence_free_slot(&lgp->res.seq_res);
8514 dprintk("<-- %s status=%d\n", __func__, status);
8516 return ERR_PTR(status);
8521 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8523 struct nfs4_layoutreturn *lrp = calldata;
8525 dprintk("--> %s\n", __func__);
8526 nfs41_setup_sequence(lrp->clp->cl_session,
8527 &lrp->args.seq_args,
8532 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8534 struct nfs4_layoutreturn *lrp = calldata;
8535 struct nfs_server *server;
8537 dprintk("--> %s\n", __func__);
8539 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8542 server = NFS_SERVER(lrp->args.inode);
8543 switch (task->tk_status) {
8545 task->tk_status = 0;
8548 case -NFS4ERR_DELAY:
8549 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8551 nfs4_sequence_free_slot(&lrp->res.seq_res);
8552 rpc_restart_call_prepare(task);
8555 dprintk("<-- %s\n", __func__);
8558 static void nfs4_layoutreturn_release(void *calldata)
8560 struct nfs4_layoutreturn *lrp = calldata;
8561 struct pnfs_layout_hdr *lo = lrp->args.layout;
8564 dprintk("--> %s\n", __func__);
8565 spin_lock(&lo->plh_inode->i_lock);
8566 if (lrp->res.lrs_present) {
8567 pnfs_mark_matching_lsegs_invalid(lo, &freeme,
8569 be32_to_cpu(lrp->args.stateid.seqid));
8570 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
8572 pnfs_mark_layout_stateid_invalid(lo, &freeme);
8573 pnfs_clear_layoutreturn_waitbit(lo);
8574 spin_unlock(&lo->plh_inode->i_lock);
8575 nfs4_sequence_free_slot(&lrp->res.seq_res);
8576 pnfs_free_lseg_list(&freeme);
8577 pnfs_put_layout_hdr(lrp->args.layout);
8578 nfs_iput_and_deactive(lrp->inode);
8580 dprintk("<-- %s\n", __func__);
8583 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8584 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8585 .rpc_call_done = nfs4_layoutreturn_done,
8586 .rpc_release = nfs4_layoutreturn_release,
8589 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8591 struct rpc_task *task;
8592 struct rpc_message msg = {
8593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8594 .rpc_argp = &lrp->args,
8595 .rpc_resp = &lrp->res,
8596 .rpc_cred = lrp->cred,
8598 struct rpc_task_setup task_setup_data = {
8599 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8600 .rpc_message = &msg,
8601 .callback_ops = &nfs4_layoutreturn_call_ops,
8602 .callback_data = lrp,
8606 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8607 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8608 &task_setup_data.rpc_client, &msg);
8610 dprintk("--> %s\n", __func__);
8612 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8614 nfs4_layoutreturn_release(lrp);
8617 task_setup_data.flags |= RPC_TASK_ASYNC;
8619 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8620 task = rpc_run_task(&task_setup_data);
8622 return PTR_ERR(task);
8624 status = task->tk_status;
8625 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8626 dprintk("<-- %s status=%d\n", __func__, status);
8632 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8633 struct pnfs_device *pdev,
8634 struct rpc_cred *cred)
8636 struct nfs4_getdeviceinfo_args args = {
8638 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8639 NOTIFY_DEVICEID4_DELETE,
8641 struct nfs4_getdeviceinfo_res res = {
8644 struct rpc_message msg = {
8645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8652 dprintk("--> %s\n", __func__);
8653 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8654 if (res.notification & ~args.notify_types)
8655 dprintk("%s: unsupported notification\n", __func__);
8656 if (res.notification != args.notify_types)
8659 dprintk("<-- %s status=%d\n", __func__, status);
8664 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8665 struct pnfs_device *pdev,
8666 struct rpc_cred *cred)
8668 struct nfs4_exception exception = { };
8672 err = nfs4_handle_exception(server,
8673 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8675 } while (exception.retry);
8678 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8680 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8682 struct nfs4_layoutcommit_data *data = calldata;
8683 struct nfs_server *server = NFS_SERVER(data->args.inode);
8684 struct nfs4_session *session = nfs4_get_session(server);
8686 nfs41_setup_sequence(session,
8687 &data->args.seq_args,
8693 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8695 struct nfs4_layoutcommit_data *data = calldata;
8696 struct nfs_server *server = NFS_SERVER(data->args.inode);
8698 if (!nfs41_sequence_done(task, &data->res.seq_res))
8701 switch (task->tk_status) { /* Just ignore these failures */
8702 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8703 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8704 case -NFS4ERR_BADLAYOUT: /* no layout */
8705 case -NFS4ERR_GRACE: /* loca_recalim always false */
8706 task->tk_status = 0;
8710 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8711 rpc_restart_call_prepare(task);
8717 static void nfs4_layoutcommit_release(void *calldata)
8719 struct nfs4_layoutcommit_data *data = calldata;
8721 pnfs_cleanup_layoutcommit(data);
8722 nfs_post_op_update_inode_force_wcc(data->args.inode,
8724 put_rpccred(data->cred);
8725 nfs_iput_and_deactive(data->inode);
8729 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8730 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8731 .rpc_call_done = nfs4_layoutcommit_done,
8732 .rpc_release = nfs4_layoutcommit_release,
8736 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8738 struct rpc_message msg = {
8739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8740 .rpc_argp = &data->args,
8741 .rpc_resp = &data->res,
8742 .rpc_cred = data->cred,
8744 struct rpc_task_setup task_setup_data = {
8745 .task = &data->task,
8746 .rpc_client = NFS_CLIENT(data->args.inode),
8747 .rpc_message = &msg,
8748 .callback_ops = &nfs4_layoutcommit_ops,
8749 .callback_data = data,
8751 struct rpc_task *task;
8754 dprintk("NFS: initiating layoutcommit call. sync %d "
8755 "lbw: %llu inode %lu\n", sync,
8756 data->args.lastbytewritten,
8757 data->args.inode->i_ino);
8760 data->inode = nfs_igrab_and_active(data->args.inode);
8761 if (data->inode == NULL) {
8762 nfs4_layoutcommit_release(data);
8765 task_setup_data.flags = RPC_TASK_ASYNC;
8767 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8768 task = rpc_run_task(&task_setup_data);
8770 return PTR_ERR(task);
8772 status = task->tk_status;
8773 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8774 dprintk("%s: status %d\n", __func__, status);
8780 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8781 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8784 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8785 struct nfs_fsinfo *info,
8786 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8788 struct nfs41_secinfo_no_name_args args = {
8789 .style = SECINFO_STYLE_CURRENT_FH,
8791 struct nfs4_secinfo_res res = {
8794 struct rpc_message msg = {
8795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8799 struct rpc_clnt *clnt = server->client;
8800 struct rpc_cred *cred = NULL;
8803 if (use_integrity) {
8804 clnt = server->nfs_client->cl_rpcclient;
8805 cred = nfs4_get_clid_cred(server->nfs_client);
8806 msg.rpc_cred = cred;
8809 dprintk("--> %s\n", __func__);
8810 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8812 dprintk("<-- %s status=%d\n", __func__, status);
8821 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8822 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8824 struct nfs4_exception exception = { };
8827 /* first try using integrity protection */
8828 err = -NFS4ERR_WRONGSEC;
8830 /* try to use integrity protection with machine cred */
8831 if (_nfs4_is_integrity_protected(server->nfs_client))
8832 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8836 * if unable to use integrity protection, or SECINFO with
8837 * integrity protection returns NFS4ERR_WRONGSEC (which is
8838 * disallowed by spec, but exists in deployed servers) use
8839 * the current filesystem's rpc_client and the user cred.
8841 if (err == -NFS4ERR_WRONGSEC)
8842 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8847 case -NFS4ERR_WRONGSEC:
8851 err = nfs4_handle_exception(server, err, &exception);
8853 } while (exception.retry);
8859 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8860 struct nfs_fsinfo *info)
8864 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8865 struct nfs4_secinfo_flavors *flavors;
8866 struct nfs4_secinfo4 *secinfo;
8869 page = alloc_page(GFP_KERNEL);
8875 flavors = page_address(page);
8876 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8879 * Fall back on "guess and check" method if
8880 * the server doesn't support SECINFO_NO_NAME
8882 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8883 err = nfs4_find_root_sec(server, fhandle, info);
8889 for (i = 0; i < flavors->num_flavors; i++) {
8890 secinfo = &flavors->flavors[i];
8892 switch (secinfo->flavor) {
8896 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8897 &secinfo->flavor_info);
8900 flavor = RPC_AUTH_MAXFLAVOR;
8904 if (!nfs_auth_info_match(&server->auth_info, flavor))
8905 flavor = RPC_AUTH_MAXFLAVOR;
8907 if (flavor != RPC_AUTH_MAXFLAVOR) {
8908 err = nfs4_lookup_root_sec(server, fhandle,
8915 if (flavor == RPC_AUTH_MAXFLAVOR)
8926 static int _nfs41_test_stateid(struct nfs_server *server,
8927 nfs4_stateid *stateid,
8928 struct rpc_cred *cred)
8931 struct nfs41_test_stateid_args args = {
8934 struct nfs41_test_stateid_res res;
8935 struct rpc_message msg = {
8936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8941 struct rpc_clnt *rpc_client = server->client;
8943 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8946 dprintk("NFS call test_stateid %p\n", stateid);
8947 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8948 nfs4_set_sequence_privileged(&args.seq_args);
8949 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8950 &args.seq_args, &res.seq_res);
8951 if (status != NFS_OK) {
8952 dprintk("NFS reply test_stateid: failed, %d\n", status);
8955 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8959 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8960 int err, struct nfs4_exception *exception)
8962 exception->retry = 0;
8964 case -NFS4ERR_DELAY:
8965 case -NFS4ERR_RETRY_UNCACHED_REP:
8966 nfs4_handle_exception(server, err, exception);
8968 case -NFS4ERR_BADSESSION:
8969 case -NFS4ERR_BADSLOT:
8970 case -NFS4ERR_BAD_HIGH_SLOT:
8971 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8972 case -NFS4ERR_DEADSESSION:
8973 nfs4_do_handle_exception(server, err, exception);
8978 * nfs41_test_stateid - perform a TEST_STATEID operation
8980 * @server: server / transport on which to perform the operation
8981 * @stateid: state ID to test
8984 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8985 * Otherwise a negative NFS4ERR value is returned if the operation
8986 * failed or the state ID is not currently valid.
8988 static int nfs41_test_stateid(struct nfs_server *server,
8989 nfs4_stateid *stateid,
8990 struct rpc_cred *cred)
8992 struct nfs4_exception exception = { };
8995 err = _nfs41_test_stateid(server, stateid, cred);
8996 nfs4_handle_delay_or_session_error(server, err, &exception);
8997 } while (exception.retry);
9001 struct nfs_free_stateid_data {
9002 struct nfs_server *server;
9003 struct nfs41_free_stateid_args args;
9004 struct nfs41_free_stateid_res res;
9007 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9009 struct nfs_free_stateid_data *data = calldata;
9010 nfs41_setup_sequence(nfs4_get_session(data->server),
9011 &data->args.seq_args,
9016 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9018 struct nfs_free_stateid_data *data = calldata;
9020 nfs41_sequence_done(task, &data->res.seq_res);
9022 switch (task->tk_status) {
9023 case -NFS4ERR_DELAY:
9024 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9025 rpc_restart_call_prepare(task);
9029 static void nfs41_free_stateid_release(void *calldata)
9034 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9035 .rpc_call_prepare = nfs41_free_stateid_prepare,
9036 .rpc_call_done = nfs41_free_stateid_done,
9037 .rpc_release = nfs41_free_stateid_release,
9040 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9041 const nfs4_stateid *stateid,
9042 struct rpc_cred *cred,
9045 struct rpc_message msg = {
9046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9049 struct rpc_task_setup task_setup = {
9050 .rpc_client = server->client,
9051 .rpc_message = &msg,
9052 .callback_ops = &nfs41_free_stateid_ops,
9053 .flags = RPC_TASK_ASYNC,
9055 struct nfs_free_stateid_data *data;
9057 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9058 &task_setup.rpc_client, &msg);
9060 dprintk("NFS call free_stateid %p\n", stateid);
9061 data = kmalloc(sizeof(*data), GFP_NOFS);
9063 return ERR_PTR(-ENOMEM);
9064 data->server = server;
9065 nfs4_stateid_copy(&data->args.stateid, stateid);
9067 task_setup.callback_data = data;
9069 msg.rpc_argp = &data->args;
9070 msg.rpc_resp = &data->res;
9071 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9073 nfs4_set_sequence_privileged(&data->args.seq_args);
9075 return rpc_run_task(&task_setup);
9079 * nfs41_free_stateid - perform a FREE_STATEID operation
9081 * @server: server / transport on which to perform the operation
9082 * @stateid: state ID to release
9084 * @is_recovery: set to true if this call needs to be privileged
9086 * Note: this function is always asynchronous.
9088 static int nfs41_free_stateid(struct nfs_server *server,
9089 const nfs4_stateid *stateid,
9090 struct rpc_cred *cred,
9093 struct rpc_task *task;
9095 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9097 return PTR_ERR(task);
9103 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9105 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9107 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9108 nfs4_free_lock_state(server, lsp);
9111 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9112 const nfs4_stateid *s2)
9114 if (s1->type != s2->type)
9117 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9120 if (s1->seqid == s2->seqid)
9122 if (s1->seqid == 0 || s2->seqid == 0)
9128 #endif /* CONFIG_NFS_V4_1 */
9130 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9131 const nfs4_stateid *s2)
9133 return nfs4_stateid_match(s1, s2);
9137 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9138 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9139 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9140 .recover_open = nfs4_open_reclaim,
9141 .recover_lock = nfs4_lock_reclaim,
9142 .establish_clid = nfs4_init_clientid,
9143 .detect_trunking = nfs40_discover_server_trunking,
9146 #if defined(CONFIG_NFS_V4_1)
9147 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9148 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9149 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9150 .recover_open = nfs4_open_reclaim,
9151 .recover_lock = nfs4_lock_reclaim,
9152 .establish_clid = nfs41_init_clientid,
9153 .reclaim_complete = nfs41_proc_reclaim_complete,
9154 .detect_trunking = nfs41_discover_server_trunking,
9156 #endif /* CONFIG_NFS_V4_1 */
9158 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9159 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9160 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9161 .recover_open = nfs40_open_expired,
9162 .recover_lock = nfs4_lock_expired,
9163 .establish_clid = nfs4_init_clientid,
9166 #if defined(CONFIG_NFS_V4_1)
9167 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9168 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9169 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9170 .recover_open = nfs41_open_expired,
9171 .recover_lock = nfs41_lock_expired,
9172 .establish_clid = nfs41_init_clientid,
9174 #endif /* CONFIG_NFS_V4_1 */
9176 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9177 .sched_state_renewal = nfs4_proc_async_renew,
9178 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9179 .renew_lease = nfs4_proc_renew,
9182 #if defined(CONFIG_NFS_V4_1)
9183 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9184 .sched_state_renewal = nfs41_proc_async_sequence,
9185 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9186 .renew_lease = nfs4_proc_sequence,
9190 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9191 .get_locations = _nfs40_proc_get_locations,
9192 .fsid_present = _nfs40_proc_fsid_present,
9195 #if defined(CONFIG_NFS_V4_1)
9196 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9197 .get_locations = _nfs41_proc_get_locations,
9198 .fsid_present = _nfs41_proc_fsid_present,
9200 #endif /* CONFIG_NFS_V4_1 */
9202 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9204 .init_caps = NFS_CAP_READDIRPLUS
9205 | NFS_CAP_ATOMIC_OPEN
9206 | NFS_CAP_POSIX_LOCK,
9207 .init_client = nfs40_init_client,
9208 .shutdown_client = nfs40_shutdown_client,
9209 .match_stateid = nfs4_match_stateid,
9210 .find_root_sec = nfs4_find_root_sec,
9211 .free_lock_state = nfs4_release_lockowner,
9212 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9213 .alloc_seqid = nfs_alloc_seqid,
9214 .call_sync_ops = &nfs40_call_sync_ops,
9215 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9216 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9217 .state_renewal_ops = &nfs40_state_renewal_ops,
9218 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9221 #if defined(CONFIG_NFS_V4_1)
9222 static struct nfs_seqid *
9223 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9228 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9230 .init_caps = NFS_CAP_READDIRPLUS
9231 | NFS_CAP_ATOMIC_OPEN
9232 | NFS_CAP_POSIX_LOCK
9233 | NFS_CAP_STATEID_NFSV41
9234 | NFS_CAP_ATOMIC_OPEN_V1,
9235 .init_client = nfs41_init_client,
9236 .shutdown_client = nfs41_shutdown_client,
9237 .match_stateid = nfs41_match_stateid,
9238 .find_root_sec = nfs41_find_root_sec,
9239 .free_lock_state = nfs41_free_lock_state,
9240 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9241 .alloc_seqid = nfs_alloc_no_seqid,
9242 .session_trunk = nfs4_test_session_trunk,
9243 .call_sync_ops = &nfs41_call_sync_ops,
9244 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9245 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9246 .state_renewal_ops = &nfs41_state_renewal_ops,
9247 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9251 #if defined(CONFIG_NFS_V4_2)
9252 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9254 .init_caps = NFS_CAP_READDIRPLUS
9255 | NFS_CAP_ATOMIC_OPEN
9256 | NFS_CAP_POSIX_LOCK
9257 | NFS_CAP_STATEID_NFSV41
9258 | NFS_CAP_ATOMIC_OPEN_V1
9261 | NFS_CAP_DEALLOCATE
9263 | NFS_CAP_LAYOUTSTATS
9265 .init_client = nfs41_init_client,
9266 .shutdown_client = nfs41_shutdown_client,
9267 .match_stateid = nfs41_match_stateid,
9268 .find_root_sec = nfs41_find_root_sec,
9269 .free_lock_state = nfs41_free_lock_state,
9270 .call_sync_ops = &nfs41_call_sync_ops,
9271 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9272 .alloc_seqid = nfs_alloc_no_seqid,
9273 .session_trunk = nfs4_test_session_trunk,
9274 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9275 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9276 .state_renewal_ops = &nfs41_state_renewal_ops,
9277 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9281 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9282 [0] = &nfs_v4_0_minor_ops,
9283 #if defined(CONFIG_NFS_V4_1)
9284 [1] = &nfs_v4_1_minor_ops,
9286 #if defined(CONFIG_NFS_V4_2)
9287 [2] = &nfs_v4_2_minor_ops,
9291 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9293 ssize_t error, error2;
9295 error = generic_listxattr(dentry, list, size);
9303 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9306 return error + error2;
9309 static const struct inode_operations nfs4_dir_inode_operations = {
9310 .create = nfs_create,
9311 .lookup = nfs_lookup,
9312 .atomic_open = nfs_atomic_open,
9314 .unlink = nfs_unlink,
9315 .symlink = nfs_symlink,
9319 .rename = nfs_rename,
9320 .permission = nfs_permission,
9321 .getattr = nfs_getattr,
9322 .setattr = nfs_setattr,
9323 .listxattr = nfs4_listxattr,
9326 static const struct inode_operations nfs4_file_inode_operations = {
9327 .permission = nfs_permission,
9328 .getattr = nfs_getattr,
9329 .setattr = nfs_setattr,
9330 .listxattr = nfs4_listxattr,
9333 const struct nfs_rpc_ops nfs_v4_clientops = {
9334 .version = 4, /* protocol version */
9335 .dentry_ops = &nfs4_dentry_operations,
9336 .dir_inode_ops = &nfs4_dir_inode_operations,
9337 .file_inode_ops = &nfs4_file_inode_operations,
9338 .file_ops = &nfs4_file_operations,
9339 .getroot = nfs4_proc_get_root,
9340 .submount = nfs4_submount,
9341 .try_mount = nfs4_try_mount,
9342 .getattr = nfs4_proc_getattr,
9343 .setattr = nfs4_proc_setattr,
9344 .lookup = nfs4_proc_lookup,
9345 .access = nfs4_proc_access,
9346 .readlink = nfs4_proc_readlink,
9347 .create = nfs4_proc_create,
9348 .remove = nfs4_proc_remove,
9349 .unlink_setup = nfs4_proc_unlink_setup,
9350 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9351 .unlink_done = nfs4_proc_unlink_done,
9352 .rename_setup = nfs4_proc_rename_setup,
9353 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9354 .rename_done = nfs4_proc_rename_done,
9355 .link = nfs4_proc_link,
9356 .symlink = nfs4_proc_symlink,
9357 .mkdir = nfs4_proc_mkdir,
9358 .rmdir = nfs4_proc_remove,
9359 .readdir = nfs4_proc_readdir,
9360 .mknod = nfs4_proc_mknod,
9361 .statfs = nfs4_proc_statfs,
9362 .fsinfo = nfs4_proc_fsinfo,
9363 .pathconf = nfs4_proc_pathconf,
9364 .set_capabilities = nfs4_server_capabilities,
9365 .decode_dirent = nfs4_decode_dirent,
9366 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9367 .read_setup = nfs4_proc_read_setup,
9368 .read_done = nfs4_read_done,
9369 .write_setup = nfs4_proc_write_setup,
9370 .write_done = nfs4_write_done,
9371 .commit_setup = nfs4_proc_commit_setup,
9372 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9373 .commit_done = nfs4_commit_done,
9374 .lock = nfs4_proc_lock,
9375 .clear_acl_cache = nfs4_zap_acl_attr,
9376 .close_context = nfs4_close_context,
9377 .open_context = nfs4_atomic_open,
9378 .have_delegation = nfs4_have_delegation,
9379 .return_delegation = nfs4_inode_return_delegation,
9380 .alloc_client = nfs4_alloc_client,
9381 .init_client = nfs4_init_client,
9382 .free_client = nfs4_free_client,
9383 .create_server = nfs4_create_server,
9384 .clone_server = nfs_clone_server,
9387 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9388 .name = XATTR_NAME_NFSV4_ACL,
9389 .list = nfs4_xattr_list_nfs4_acl,
9390 .get = nfs4_xattr_get_nfs4_acl,
9391 .set = nfs4_xattr_set_nfs4_acl,
9394 const struct xattr_handler *nfs4_xattr_handlers[] = {
9395 &nfs4_xattr_nfs4_acl_handler,
9396 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9397 &nfs4_xattr_nfs4_label_handler,