4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
57 #include <linux/iversion.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 nfs_open_context *ctx, struct nfs4_label *ilabel,
98 struct nfs4_label *olabel);
99 #ifdef CONFIG_NFS_V4_1
100 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
101 struct rpc_cred *cred,
102 struct nfs4_slot *slot,
104 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
106 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
107 struct rpc_cred *, bool);
110 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
111 static inline struct nfs4_label *
112 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
113 struct iattr *sattr, struct nfs4_label *label)
120 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
123 err = security_dentry_init_security(dentry, sattr->ia_mode,
124 &dentry->d_name, (void **)&label->label, &label->len);
131 nfs4_label_release_security(struct nfs4_label *label)
134 security_release_secctx(label->label, label->len);
136 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139 return server->attr_bitmask;
141 return server->attr_bitmask_nl;
144 static inline struct nfs4_label *
145 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
146 struct iattr *sattr, struct nfs4_label *l)
149 nfs4_label_release_security(struct nfs4_label *label)
152 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
153 { return server->attr_bitmask; }
156 /* Prevent leaks of NFSv4 errors into userland */
157 static int nfs4_map_errors(int err)
162 case -NFS4ERR_RESOURCE:
163 case -NFS4ERR_LAYOUTTRYLATER:
164 case -NFS4ERR_RECALLCONFLICT:
166 case -NFS4ERR_WRONGSEC:
167 case -NFS4ERR_WRONG_CRED:
169 case -NFS4ERR_BADOWNER:
170 case -NFS4ERR_BADNAME:
172 case -NFS4ERR_SHARE_DENIED:
174 case -NFS4ERR_MINOR_VERS_MISMATCH:
175 return -EPROTONOSUPPORT;
176 case -NFS4ERR_FILE_OPEN:
179 dprintk("%s could not handle NFSv4 error %d\n",
187 * This is our standard bitmap for GETATTR requests.
189 const u32 nfs4_fattr_bitmap[3] = {
191 | FATTR4_WORD0_CHANGE
194 | FATTR4_WORD0_FILEID,
196 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID,
205 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
206 FATTR4_WORD2_SECURITY_LABEL
210 static const u32 nfs4_pnfs_open_bitmap[3] = {
212 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
217 | FATTR4_WORD1_NUMLINKS
219 | FATTR4_WORD1_OWNER_GROUP
220 | FATTR4_WORD1_RAWDEV
221 | FATTR4_WORD1_SPACE_USED
222 | FATTR4_WORD1_TIME_ACCESS
223 | FATTR4_WORD1_TIME_METADATA
224 | FATTR4_WORD1_TIME_MODIFY,
225 FATTR4_WORD2_MDSTHRESHOLD
226 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
227 | FATTR4_WORD2_SECURITY_LABEL
231 static const u32 nfs4_open_noattr_bitmap[3] = {
233 | FATTR4_WORD0_FILEID,
236 const u32 nfs4_statfs_bitmap[3] = {
237 FATTR4_WORD0_FILES_AVAIL
238 | FATTR4_WORD0_FILES_FREE
239 | FATTR4_WORD0_FILES_TOTAL,
240 FATTR4_WORD1_SPACE_AVAIL
241 | FATTR4_WORD1_SPACE_FREE
242 | FATTR4_WORD1_SPACE_TOTAL
245 const u32 nfs4_pathconf_bitmap[3] = {
247 | FATTR4_WORD0_MAXNAME,
251 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
252 | FATTR4_WORD0_MAXREAD
253 | FATTR4_WORD0_MAXWRITE
254 | FATTR4_WORD0_LEASE_TIME,
255 FATTR4_WORD1_TIME_DELTA
256 | FATTR4_WORD1_FS_LAYOUT_TYPES,
257 FATTR4_WORD2_LAYOUT_BLKSIZE
258 | FATTR4_WORD2_CLONE_BLKSIZE
261 const u32 nfs4_fs_locations_bitmap[3] = {
265 | FATTR4_WORD0_FILEID
266 | FATTR4_WORD0_FS_LOCATIONS,
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)
280 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
284 readdir->cookie = cookie;
285 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
290 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
295 * NFSv4 servers do not return entries for '.' and '..'
296 * Therefore, we fake these entries here. We let '.'
297 * have cookie 0 and '..' have cookie 1. Note that
298 * when talking to the server, we always send cookie 0
301 start = p = kmap_atomic(*readdir->pages);
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_one; /* cookie, second word */
307 *p++ = xdr_one; /* entry len */
308 memcpy(p, ".\0\0\0", 4); /* entry */
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(attrs); /* bitmap */
312 *p++ = htonl(12); /* attribute buffer length */
313 *p++ = htonl(NF4DIR);
314 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
317 *p++ = xdr_one; /* next */
318 *p++ = xdr_zero; /* cookie, first word */
319 *p++ = xdr_two; /* cookie, second word */
320 *p++ = xdr_two; /* entry len */
321 memcpy(p, "..\0\0", 4); /* entry */
323 *p++ = xdr_one; /* bitmap length */
324 *p++ = htonl(attrs); /* bitmap */
325 *p++ = htonl(12); /* attribute buffer length */
326 *p++ = htonl(NF4DIR);
327 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
329 readdir->pgbase = (char *)p - (char *)start;
330 readdir->count -= readdir->pgbase;
331 kunmap_atomic(start);
334 static void nfs4_test_and_free_stateid(struct nfs_server *server,
335 nfs4_stateid *stateid,
336 struct rpc_cred *cred)
338 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
340 ops->test_and_free_expired(server, stateid, cred);
343 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
344 nfs4_stateid *stateid,
345 struct rpc_cred *cred)
347 stateid->type = NFS4_REVOKED_STATEID_TYPE;
348 nfs4_test_and_free_stateid(server, stateid, cred);
351 static void nfs4_free_revoked_stateid(struct nfs_server *server,
352 const nfs4_stateid *stateid,
353 struct rpc_cred *cred)
357 nfs4_stateid_copy(&tmp, stateid);
358 __nfs4_free_revoked_stateid(server, &tmp, cred);
361 static long nfs4_update_delay(long *timeout)
365 return NFS4_POLL_RETRY_MAX;
367 *timeout = NFS4_POLL_RETRY_MIN;
368 if (*timeout > NFS4_POLL_RETRY_MAX)
369 *timeout = NFS4_POLL_RETRY_MAX;
375 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
381 freezable_schedule_timeout_killable_unsafe(
382 nfs4_update_delay(timeout));
383 if (fatal_signal_pending(current))
388 /* This is the error handling routine for processes that are allowed
391 static int nfs4_do_handle_exception(struct nfs_server *server,
392 int errorcode, struct nfs4_exception *exception)
394 struct nfs_client *clp = server->nfs_client;
395 struct nfs4_state *state = exception->state;
396 const nfs4_stateid *stateid = exception->stateid;
397 struct inode *inode = exception->inode;
400 exception->delay = 0;
401 exception->recovering = 0;
402 exception->retry = 0;
404 if (stateid == NULL && state != NULL)
405 stateid = &state->stateid;
410 case -NFS4ERR_DELEG_REVOKED:
411 case -NFS4ERR_ADMIN_REVOKED:
412 case -NFS4ERR_EXPIRED:
413 case -NFS4ERR_BAD_STATEID:
414 if (inode != NULL && stateid != NULL) {
415 nfs_inode_find_state_and_recover(inode,
417 goto wait_on_recovery;
419 case -NFS4ERR_OPENMODE:
423 err = nfs_async_inode_return_delegation(inode,
426 goto wait_on_recovery;
427 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
428 exception->retry = 1;
434 ret = nfs4_schedule_stateid_recovery(server, state);
437 goto wait_on_recovery;
438 case -NFS4ERR_STALE_STATEID:
439 case -NFS4ERR_STALE_CLIENTID:
440 nfs4_schedule_lease_recovery(clp);
441 goto wait_on_recovery;
443 ret = nfs4_schedule_migration_recovery(server);
446 goto wait_on_recovery;
447 case -NFS4ERR_LEASE_MOVED:
448 nfs4_schedule_lease_moved_recovery(clp);
449 goto wait_on_recovery;
450 #if defined(CONFIG_NFS_V4_1)
451 case -NFS4ERR_BADSESSION:
452 case -NFS4ERR_BADSLOT:
453 case -NFS4ERR_BAD_HIGH_SLOT:
454 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
455 case -NFS4ERR_DEADSESSION:
456 case -NFS4ERR_SEQ_FALSE_RETRY:
457 case -NFS4ERR_SEQ_MISORDERED:
458 dprintk("%s ERROR: %d Reset session\n", __func__,
460 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
461 goto wait_on_recovery;
462 #endif /* defined(CONFIG_NFS_V4_1) */
463 case -NFS4ERR_FILE_OPEN:
464 if (exception->timeout > HZ) {
465 /* We have retried a decent amount, time to
472 nfs_inc_server_stats(server, NFSIOS_DELAY);
474 case -NFS4ERR_LAYOUTTRYLATER:
475 case -NFS4ERR_RECALLCONFLICT:
476 exception->delay = 1;
479 case -NFS4ERR_RETRY_UNCACHED_REP:
480 case -NFS4ERR_OLD_STATEID:
481 exception->retry = 1;
483 case -NFS4ERR_BADOWNER:
484 /* The following works around a Linux server bug! */
485 case -NFS4ERR_BADNAME:
486 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
487 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
488 exception->retry = 1;
489 printk(KERN_WARNING "NFS: v4 server %s "
490 "does not accept raw "
492 "Reenabling the idmapper.\n",
493 server->nfs_client->cl_hostname);
496 /* We failed to handle the error */
497 return nfs4_map_errors(ret);
499 exception->recovering = 1;
503 /* This is the error handling routine for processes that are allowed
506 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
508 struct nfs_client *clp = server->nfs_client;
511 ret = nfs4_do_handle_exception(server, errorcode, exception);
512 if (exception->delay) {
513 ret = nfs4_delay(server->client, &exception->timeout);
516 if (exception->recovering) {
517 ret = nfs4_wait_clnt_recover(clp);
518 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
525 exception->retry = 1;
530 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
531 int errorcode, struct nfs4_exception *exception)
533 struct nfs_client *clp = server->nfs_client;
536 ret = nfs4_do_handle_exception(server, errorcode, exception);
537 if (exception->delay) {
538 rpc_delay(task, nfs4_update_delay(&exception->timeout));
541 if (exception->recovering) {
542 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
543 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
544 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
547 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
552 exception->retry = 1;
557 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
558 struct nfs4_state *state, long *timeout)
560 struct nfs4_exception exception = {
564 if (task->tk_status >= 0)
567 exception.timeout = *timeout;
568 task->tk_status = nfs4_async_handle_exception(task, server,
571 if (exception.delay && timeout)
572 *timeout = exception.timeout;
579 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
580 * or 'false' otherwise.
582 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
584 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
585 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
588 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
590 spin_lock(&clp->cl_lock);
591 if (time_before(clp->cl_last_renewal,timestamp))
592 clp->cl_last_renewal = timestamp;
593 spin_unlock(&clp->cl_lock);
596 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
598 struct nfs_client *clp = server->nfs_client;
600 if (!nfs4_has_session(clp))
601 do_renew_lease(clp, timestamp);
604 struct nfs4_call_sync_data {
605 const struct nfs_server *seq_server;
606 struct nfs4_sequence_args *seq_args;
607 struct nfs4_sequence_res *seq_res;
610 void nfs4_init_sequence(struct nfs4_sequence_args *args,
611 struct nfs4_sequence_res *res, int cache_reply)
613 args->sa_slot = NULL;
614 args->sa_cache_this = cache_reply;
615 args->sa_privileged = 0;
620 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
622 args->sa_privileged = 1;
625 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
627 struct nfs4_slot *slot = res->sr_slot;
628 struct nfs4_slot_table *tbl;
631 spin_lock(&tbl->slot_tbl_lock);
632 if (!nfs41_wake_and_assign_slot(tbl, slot))
633 nfs4_free_slot(tbl, slot);
634 spin_unlock(&tbl->slot_tbl_lock);
639 static int nfs40_sequence_done(struct rpc_task *task,
640 struct nfs4_sequence_res *res)
642 if (res->sr_slot != NULL)
643 nfs40_sequence_free_slot(res);
647 #if defined(CONFIG_NFS_V4_1)
649 static void nfs41_release_slot(struct nfs4_slot *slot)
651 struct nfs4_session *session;
652 struct nfs4_slot_table *tbl;
653 bool send_new_highest_used_slotid = false;
658 session = tbl->session;
660 /* Bump the slot sequence number */
665 spin_lock(&tbl->slot_tbl_lock);
666 /* Be nice to the server: try to ensure that the last transmitted
667 * value for highest_user_slotid <= target_highest_slotid
669 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
670 send_new_highest_used_slotid = true;
672 if (nfs41_wake_and_assign_slot(tbl, slot)) {
673 send_new_highest_used_slotid = false;
676 nfs4_free_slot(tbl, slot);
678 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
679 send_new_highest_used_slotid = false;
681 spin_unlock(&tbl->slot_tbl_lock);
682 if (send_new_highest_used_slotid)
683 nfs41_notify_server(session->clp);
684 if (waitqueue_active(&tbl->slot_waitq))
685 wake_up_all(&tbl->slot_waitq);
688 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
690 nfs41_release_slot(res->sr_slot);
694 static int nfs41_sequence_process(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
697 struct nfs4_session *session;
698 struct nfs4_slot *slot = res->sr_slot;
699 struct nfs_client *clp;
700 bool interrupted = false;
705 /* don't increment the sequence number if the task wasn't sent */
706 if (!RPC_WAS_SENT(task))
709 session = slot->table->session;
711 if (slot->interrupted) {
712 if (res->sr_status != -NFS4ERR_DELAY)
713 slot->interrupted = 0;
717 trace_nfs4_sequence_done(session, res);
718 /* Check the SEQUENCE operation status */
719 switch (res->sr_status) {
721 /* Update the slot's sequence and clientid lease timer */
724 do_renew_lease(clp, res->sr_timestamp);
725 /* Check sequence flags */
726 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
728 nfs41_update_target_slotid(slot->table, slot, res);
732 * sr_status remains 1 if an RPC level error occurred.
733 * The server may or may not have processed the sequence
735 * Mark the slot as having hosted an interrupted RPC call.
737 slot->interrupted = 1;
740 /* The server detected a resend of the RPC call and
741 * returned NFS4ERR_DELAY as per Section 2.10.6.2
744 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
749 case -NFS4ERR_BADSLOT:
751 * The slot id we used was probably retired. Try again
752 * using a different slot id.
754 if (slot->seq_nr < slot->table->target_highest_slotid)
755 goto session_recover;
757 case -NFS4ERR_SEQ_MISORDERED:
759 * Was the last operation on this sequence interrupted?
760 * If so, retry after bumping the sequence number.
765 * Could this slot have been previously retired?
766 * If so, then the server may be expecting seq_nr = 1!
768 if (slot->seq_nr != 1) {
772 goto session_recover;
773 case -NFS4ERR_SEQ_FALSE_RETRY:
776 goto session_recover;
778 /* Just update the slot sequence no. */
782 /* The session may be reset by one of the error handlers. */
783 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
787 nfs4_schedule_session_recovery(session, res->sr_status);
792 if (rpc_restart_call_prepare(task)) {
793 nfs41_sequence_free_slot(res);
799 if (!rpc_restart_call(task))
801 rpc_delay(task, NFS4_POLL_RETRY_MAX);
805 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
807 if (!nfs41_sequence_process(task, res))
809 if (res->sr_slot != NULL)
810 nfs41_sequence_free_slot(res);
814 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
816 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
818 if (res->sr_slot == NULL)
820 if (res->sr_slot->table->session != NULL)
821 return nfs41_sequence_process(task, res);
822 return nfs40_sequence_done(task, res);
825 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
827 if (res->sr_slot != NULL) {
828 if (res->sr_slot->table->session != NULL)
829 nfs41_sequence_free_slot(res);
831 nfs40_sequence_free_slot(res);
835 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
837 if (res->sr_slot == NULL)
839 if (!res->sr_slot->table->session)
840 return nfs40_sequence_done(task, res);
841 return nfs41_sequence_done(task, res);
843 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
845 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
847 struct nfs4_call_sync_data *data = calldata;
849 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
851 nfs4_setup_sequence(data->seq_server->nfs_client,
852 data->seq_args, data->seq_res, task);
855 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
857 struct nfs4_call_sync_data *data = calldata;
859 nfs41_sequence_done(task, data->seq_res);
862 static const struct rpc_call_ops nfs41_call_sync_ops = {
863 .rpc_call_prepare = nfs41_call_sync_prepare,
864 .rpc_call_done = nfs41_call_sync_done,
868 nfs4_sequence_process_interrupted(struct nfs_client *client,
869 struct nfs4_slot *slot, struct rpc_cred *cred)
871 struct rpc_task *task;
873 task = _nfs41_proc_sequence(client, cred, slot, true);
875 rpc_put_task_async(task);
878 #else /* !CONFIG_NFS_V4_1 */
880 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
882 return nfs40_sequence_done(task, res);
885 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
887 if (res->sr_slot != NULL)
888 nfs40_sequence_free_slot(res);
891 int nfs4_sequence_done(struct rpc_task *task,
892 struct nfs4_sequence_res *res)
894 return nfs40_sequence_done(task, res);
896 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
899 nfs4_sequence_process_interrupted(struct nfs_client *client,
900 struct nfs4_slot *slot, struct rpc_cred *cred)
903 slot->interrupted = 0;
906 #endif /* !CONFIG_NFS_V4_1 */
909 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
910 struct nfs4_sequence_res *res,
911 struct nfs4_slot *slot)
915 slot->privileged = args->sa_privileged ? 1 : 0;
916 args->sa_slot = slot;
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
925 int nfs4_setup_sequence(struct nfs_client *client,
926 struct nfs4_sequence_args *args,
927 struct nfs4_sequence_res *res,
928 struct rpc_task *task)
930 struct nfs4_session *session = nfs4_get_session(client);
931 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
932 struct nfs4_slot *slot;
934 /* slot already allocated? */
935 if (res->sr_slot != NULL)
939 tbl = &session->fc_slot_table;
940 task->tk_timeout = 0;
944 spin_lock(&tbl->slot_tbl_lock);
945 /* The state manager will wait until the slot table is empty */
946 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
949 slot = nfs4_alloc_slot(tbl);
951 /* Try again in 1/4 second */
952 if (slot == ERR_PTR(-ENOMEM))
953 task->tk_timeout = HZ >> 2;
956 spin_unlock(&tbl->slot_tbl_lock);
958 if (likely(!slot->interrupted))
960 nfs4_sequence_process_interrupted(client,
961 slot, task->tk_msg.rpc_cred);
964 nfs4_sequence_attach_slot(args, res, slot);
966 trace_nfs4_setup_sequence(session, args);
968 rpc_call_start(task);
972 if (args->sa_privileged)
973 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
974 NULL, RPC_PRIORITY_PRIVILEGED);
976 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
977 spin_unlock(&tbl->slot_tbl_lock);
980 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
982 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
984 struct nfs4_call_sync_data *data = calldata;
985 nfs4_setup_sequence(data->seq_server->nfs_client,
986 data->seq_args, data->seq_res, task);
989 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
991 struct nfs4_call_sync_data *data = calldata;
992 nfs4_sequence_done(task, data->seq_res);
995 static const struct rpc_call_ops nfs40_call_sync_ops = {
996 .rpc_call_prepare = nfs40_call_sync_prepare,
997 .rpc_call_done = nfs40_call_sync_done,
1000 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1001 struct nfs_server *server,
1002 struct rpc_message *msg,
1003 struct nfs4_sequence_args *args,
1004 struct nfs4_sequence_res *res)
1007 struct rpc_task *task;
1008 struct nfs_client *clp = server->nfs_client;
1009 struct nfs4_call_sync_data data = {
1010 .seq_server = server,
1014 struct rpc_task_setup task_setup = {
1017 .callback_ops = clp->cl_mvops->call_sync_ops,
1018 .callback_data = &data
1021 task = rpc_run_task(&task_setup);
1023 ret = PTR_ERR(task);
1025 ret = task->tk_status;
1031 int nfs4_call_sync(struct rpc_clnt *clnt,
1032 struct nfs_server *server,
1033 struct rpc_message *msg,
1034 struct nfs4_sequence_args *args,
1035 struct nfs4_sequence_res *res,
1038 nfs4_init_sequence(args, res, cache_reply);
1039 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1042 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1043 unsigned long timestamp)
1045 struct nfs_inode *nfsi = NFS_I(dir);
1047 spin_lock(&dir->i_lock);
1048 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1049 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) {
1050 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1051 nfsi->attrtimeo_timestamp = jiffies;
1053 nfs_force_lookup_revalidate(dir);
1054 if (cinfo->before != inode_peek_iversion_raw(dir))
1055 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1056 NFS_INO_INVALID_ACL;
1058 inode_set_iversion_raw(dir, cinfo->after);
1059 nfsi->read_cache_jiffies = timestamp;
1060 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1061 nfs_fscache_invalidate(dir);
1062 spin_unlock(&dir->i_lock);
1065 struct nfs4_opendata {
1067 struct nfs_openargs o_arg;
1068 struct nfs_openres o_res;
1069 struct nfs_open_confirmargs c_arg;
1070 struct nfs_open_confirmres c_res;
1071 struct nfs4_string owner_name;
1072 struct nfs4_string group_name;
1073 struct nfs4_label *a_label;
1074 struct nfs_fattr f_attr;
1075 struct nfs4_label *f_label;
1077 struct dentry *dentry;
1078 struct nfs4_state_owner *owner;
1079 struct nfs4_state *state;
1081 unsigned long timestamp;
1089 struct nfs4_open_createattrs {
1090 struct nfs4_label *label;
1091 struct iattr *sattr;
1092 const __u32 verf[2];
1095 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1096 int err, struct nfs4_exception *exception)
1100 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1102 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1103 exception->retry = 1;
1108 nfs4_map_atomic_open_share(struct nfs_server *server,
1109 fmode_t fmode, int openflags)
1113 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1115 res = NFS4_SHARE_ACCESS_READ;
1118 res = NFS4_SHARE_ACCESS_WRITE;
1120 case FMODE_READ|FMODE_WRITE:
1121 res = NFS4_SHARE_ACCESS_BOTH;
1123 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1125 /* Want no delegation if we're using O_DIRECT */
1126 if (openflags & O_DIRECT)
1127 res |= NFS4_SHARE_WANT_NO_DELEG;
1132 static enum open_claim_type4
1133 nfs4_map_atomic_open_claim(struct nfs_server *server,
1134 enum open_claim_type4 claim)
1136 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1141 case NFS4_OPEN_CLAIM_FH:
1142 return NFS4_OPEN_CLAIM_NULL;
1143 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1144 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1145 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1146 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1150 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1152 p->o_res.f_attr = &p->f_attr;
1153 p->o_res.f_label = p->f_label;
1154 p->o_res.seqid = p->o_arg.seqid;
1155 p->c_res.seqid = p->c_arg.seqid;
1156 p->o_res.server = p->o_arg.server;
1157 p->o_res.access_request = p->o_arg.access;
1158 nfs_fattr_init(&p->f_attr);
1159 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1162 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1163 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1164 const struct nfs4_open_createattrs *c,
1165 enum open_claim_type4 claim,
1168 struct dentry *parent = dget_parent(dentry);
1169 struct inode *dir = d_inode(parent);
1170 struct nfs_server *server = NFS_SERVER(dir);
1171 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1172 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
1173 struct nfs4_opendata *p;
1175 p = kzalloc(sizeof(*p), gfp_mask);
1179 p->f_label = nfs4_label_alloc(server, gfp_mask);
1180 if (IS_ERR(p->f_label))
1183 p->a_label = nfs4_label_alloc(server, gfp_mask);
1184 if (IS_ERR(p->a_label))
1187 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1188 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1189 if (IS_ERR(p->o_arg.seqid))
1190 goto err_free_label;
1191 nfs_sb_active(dentry->d_sb);
1192 p->dentry = dget(dentry);
1195 atomic_inc(&sp->so_count);
1196 p->o_arg.open_flags = flags;
1197 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1198 p->o_arg.umask = current_umask();
1199 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1200 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1202 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1203 * will return permission denied for all bits until close */
1204 if (!(flags & O_EXCL)) {
1205 /* ask server to check for all possible rights as results
1207 switch (p->o_arg.claim) {
1210 case NFS4_OPEN_CLAIM_NULL:
1211 case NFS4_OPEN_CLAIM_FH:
1212 p->o_arg.access = NFS4_ACCESS_READ |
1213 NFS4_ACCESS_MODIFY |
1214 NFS4_ACCESS_EXTEND |
1215 NFS4_ACCESS_EXECUTE;
1218 p->o_arg.clientid = server->nfs_client->cl_clientid;
1219 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1220 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1221 p->o_arg.name = &dentry->d_name;
1222 p->o_arg.server = server;
1223 p->o_arg.bitmask = nfs4_bitmask(server, label);
1224 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1225 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1226 switch (p->o_arg.claim) {
1227 case NFS4_OPEN_CLAIM_NULL:
1228 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1229 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1230 p->o_arg.fh = NFS_FH(dir);
1232 case NFS4_OPEN_CLAIM_PREVIOUS:
1233 case NFS4_OPEN_CLAIM_FH:
1234 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1235 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1236 p->o_arg.fh = NFS_FH(d_inode(dentry));
1238 if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) {
1239 p->o_arg.u.attrs = &p->attrs;
1240 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1242 memcpy(p->o_arg.u.verifier.data, c->verf,
1243 sizeof(p->o_arg.u.verifier.data));
1245 p->c_arg.fh = &p->o_res.fh;
1246 p->c_arg.stateid = &p->o_res.stateid;
1247 p->c_arg.seqid = p->o_arg.seqid;
1248 nfs4_init_opendata_res(p);
1249 kref_init(&p->kref);
1253 nfs4_label_free(p->a_label);
1255 nfs4_label_free(p->f_label);
1263 static void nfs4_opendata_free(struct kref *kref)
1265 struct nfs4_opendata *p = container_of(kref,
1266 struct nfs4_opendata, kref);
1267 struct super_block *sb = p->dentry->d_sb;
1269 nfs_free_seqid(p->o_arg.seqid);
1270 nfs4_sequence_free_slot(&p->o_res.seq_res);
1271 if (p->state != NULL)
1272 nfs4_put_open_state(p->state);
1273 nfs4_put_state_owner(p->owner);
1275 nfs4_label_free(p->a_label);
1276 nfs4_label_free(p->f_label);
1280 nfs_sb_deactive(sb);
1281 nfs_fattr_free_names(&p->f_attr);
1282 kfree(p->f_attr.mdsthreshold);
1286 static void nfs4_opendata_put(struct nfs4_opendata *p)
1289 kref_put(&p->kref, nfs4_opendata_free);
1292 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1295 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1296 case FMODE_READ|FMODE_WRITE:
1297 return state->n_rdwr != 0;
1299 return state->n_wronly != 0;
1301 return state->n_rdonly != 0;
1307 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1311 if (open_mode & (O_EXCL|O_TRUNC))
1313 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1315 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1316 && state->n_rdonly != 0;
1319 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1320 && state->n_wronly != 0;
1322 case FMODE_READ|FMODE_WRITE:
1323 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1324 && state->n_rdwr != 0;
1330 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1331 enum open_claim_type4 claim)
1333 if (delegation == NULL)
1335 if ((delegation->type & fmode) != fmode)
1337 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1340 case NFS4_OPEN_CLAIM_NULL:
1341 case NFS4_OPEN_CLAIM_FH:
1343 case NFS4_OPEN_CLAIM_PREVIOUS:
1344 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1349 nfs_mark_delegation_referenced(delegation);
1353 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1362 case FMODE_READ|FMODE_WRITE:
1365 nfs4_state_set_mode_locked(state, state->state | fmode);
1368 #ifdef CONFIG_NFS_V4_1
1369 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1371 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1373 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1375 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1379 #endif /* CONFIG_NFS_V4_1 */
1381 static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1383 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1384 wake_up_all(&state->waitq);
1387 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state,
1388 const nfs4_stateid *stateid)
1390 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid);
1391 u32 stateid_seqid = be32_to_cpu(stateid->seqid);
1393 if (stateid_seqid == state_seqid + 1U ||
1394 (stateid_seqid == 1U && state_seqid == 0xffffffffU))
1395 nfs_state_log_update_open_stateid(state);
1397 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1400 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1402 struct nfs_client *clp = state->owner->so_server->nfs_client;
1403 bool need_recover = false;
1405 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1406 need_recover = true;
1407 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1408 need_recover = true;
1409 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1410 need_recover = true;
1412 nfs4_state_mark_reclaim_nograce(clp, state);
1416 * Check for whether or not the caller may update the open stateid
1417 * to the value passed in by stateid.
1419 * Note: This function relies heavily on the server implementing
1420 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1422 * i.e. The stateid seqids have to be initialised to 1, and
1423 * are then incremented on every state transition.
1425 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1426 const nfs4_stateid *stateid)
1428 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 ||
1429 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1430 if (stateid->seqid == cpu_to_be32(1))
1431 nfs_state_log_update_open_stateid(state);
1433 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1437 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1438 nfs_state_log_out_of_order_open_stateid(state, stateid);
1444 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1446 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1448 if (state->n_wronly)
1449 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1450 if (state->n_rdonly)
1451 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1453 set_bit(NFS_O_RDWR_STATE, &state->flags);
1454 set_bit(NFS_OPEN_STATE, &state->flags);
1457 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1458 nfs4_stateid *stateid, fmode_t fmode)
1460 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1461 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1463 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1469 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1470 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1471 clear_bit(NFS_OPEN_STATE, &state->flags);
1473 if (stateid == NULL)
1475 /* Handle OPEN+OPEN_DOWNGRADE races */
1476 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1477 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1478 nfs_resync_open_stateid_locked(state);
1481 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1482 nfs4_stateid_copy(&state->stateid, stateid);
1483 nfs4_stateid_copy(&state->open_stateid, stateid);
1484 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
1486 nfs_state_log_update_open_stateid(state);
1489 static void nfs_clear_open_stateid(struct nfs4_state *state,
1490 nfs4_stateid *arg_stateid,
1491 nfs4_stateid *stateid, fmode_t fmode)
1493 write_seqlock(&state->seqlock);
1494 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1495 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1496 nfs_clear_open_stateid_locked(state, stateid, fmode);
1497 write_sequnlock(&state->seqlock);
1498 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1499 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1502 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1503 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1509 if (!nfs_need_update_open_stateid(state, stateid))
1511 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1515 /* Rely on seqids for serialisation with NFSv4.0 */
1516 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1519 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1521 * Ensure we process the state changes in the same order
1522 * in which the server processed them by delaying the
1523 * update of the stateid until we are in sequence.
1525 write_sequnlock(&state->seqlock);
1526 spin_unlock(&state->owner->so_lock);
1528 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
1529 if (!signal_pending(current)) {
1530 if (schedule_timeout(5*HZ) == 0)
1536 finish_wait(&state->waitq, &wait);
1538 spin_lock(&state->owner->so_lock);
1539 write_seqlock(&state->seqlock);
1542 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1543 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1544 nfs4_stateid_copy(freeme, &state->open_stateid);
1545 nfs_test_and_clear_all_open_stateid(state);
1548 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1549 nfs4_stateid_copy(&state->stateid, stateid);
1550 nfs4_stateid_copy(&state->open_stateid, stateid);
1551 trace_nfs4_open_stateid_update(state->inode, stateid, status);
1552 nfs_state_log_update_open_stateid(state);
1555 static void nfs_state_set_open_stateid(struct nfs4_state *state,
1556 const nfs4_stateid *open_stateid,
1558 nfs4_stateid *freeme)
1561 * Protect the call to nfs4_state_set_mode_locked and
1562 * serialise the stateid update
1564 write_seqlock(&state->seqlock);
1565 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1568 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1571 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1573 case FMODE_READ|FMODE_WRITE:
1574 set_bit(NFS_O_RDWR_STATE, &state->flags);
1576 set_bit(NFS_OPEN_STATE, &state->flags);
1577 write_sequnlock(&state->seqlock);
1580 static void nfs_state_set_delegation(struct nfs4_state *state,
1581 const nfs4_stateid *deleg_stateid,
1585 * Protect the call to nfs4_state_set_mode_locked and
1586 * serialise the stateid update
1588 write_seqlock(&state->seqlock);
1589 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1590 set_bit(NFS_DELEGATED_STATE, &state->flags);
1591 write_sequnlock(&state->seqlock);
1594 static int update_open_stateid(struct nfs4_state *state,
1595 const nfs4_stateid *open_stateid,
1596 const nfs4_stateid *delegation,
1599 struct nfs_server *server = NFS_SERVER(state->inode);
1600 struct nfs_client *clp = server->nfs_client;
1601 struct nfs_inode *nfsi = NFS_I(state->inode);
1602 struct nfs_delegation *deleg_cur;
1603 nfs4_stateid freeme = { };
1606 fmode &= (FMODE_READ|FMODE_WRITE);
1609 spin_lock(&state->owner->so_lock);
1610 if (open_stateid != NULL) {
1611 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1615 deleg_cur = rcu_dereference(nfsi->delegation);
1616 if (deleg_cur == NULL)
1619 spin_lock(&deleg_cur->lock);
1620 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1621 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1622 (deleg_cur->type & fmode) != fmode)
1623 goto no_delegation_unlock;
1625 if (delegation == NULL)
1626 delegation = &deleg_cur->stateid;
1627 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1628 goto no_delegation_unlock;
1630 nfs_mark_delegation_referenced(deleg_cur);
1631 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
1633 no_delegation_unlock:
1634 spin_unlock(&deleg_cur->lock);
1637 update_open_stateflags(state, fmode);
1638 spin_unlock(&state->owner->so_lock);
1641 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1642 nfs4_schedule_state_manager(clp);
1643 if (freeme.type != 0)
1644 nfs4_test_and_free_stateid(server, &freeme,
1645 state->owner->so_cred);
1650 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1651 const nfs4_stateid *stateid)
1653 struct nfs4_state *state = lsp->ls_state;
1656 spin_lock(&state->state_lock);
1657 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1659 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1661 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1664 spin_unlock(&state->state_lock);
1668 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1670 struct nfs_delegation *delegation;
1673 delegation = rcu_dereference(NFS_I(inode)->delegation);
1674 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1679 nfs4_inode_return_delegation(inode);
1682 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1684 struct nfs4_state *state = opendata->state;
1685 struct nfs_inode *nfsi = NFS_I(state->inode);
1686 struct nfs_delegation *delegation;
1687 int open_mode = opendata->o_arg.open_flags;
1688 fmode_t fmode = opendata->o_arg.fmode;
1689 enum open_claim_type4 claim = opendata->o_arg.claim;
1690 nfs4_stateid stateid;
1694 spin_lock(&state->owner->so_lock);
1695 if (can_open_cached(state, fmode, open_mode)) {
1696 update_open_stateflags(state, fmode);
1697 spin_unlock(&state->owner->so_lock);
1698 goto out_return_state;
1700 spin_unlock(&state->owner->so_lock);
1702 delegation = rcu_dereference(nfsi->delegation);
1703 if (!can_open_delegated(delegation, fmode, claim)) {
1707 /* Save the delegation */
1708 nfs4_stateid_copy(&stateid, &delegation->stateid);
1710 nfs_release_seqid(opendata->o_arg.seqid);
1711 if (!opendata->is_recover) {
1712 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1718 /* Try to update the stateid using the delegation */
1719 if (update_open_stateid(state, NULL, &stateid, fmode))
1720 goto out_return_state;
1723 return ERR_PTR(ret);
1725 atomic_inc(&state->count);
1730 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1732 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1733 struct nfs_delegation *delegation;
1734 int delegation_flags = 0;
1737 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1739 delegation_flags = delegation->flags;
1741 switch (data->o_arg.claim) {
1744 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1745 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1746 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1747 "returning a delegation for "
1748 "OPEN(CLAIM_DELEGATE_CUR)\n",
1752 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1753 nfs_inode_set_delegation(state->inode,
1754 data->owner->so_cred,
1757 nfs_inode_reclaim_delegation(state->inode,
1758 data->owner->so_cred,
1763 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1764 * and update the nfs4_state.
1766 static struct nfs4_state *
1767 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1769 struct inode *inode = data->state->inode;
1770 struct nfs4_state *state = data->state;
1773 if (!data->rpc_done) {
1774 if (data->rpc_status)
1775 return ERR_PTR(data->rpc_status);
1776 /* cached opens have already been processed */
1780 ret = nfs_refresh_inode(inode, &data->f_attr);
1782 return ERR_PTR(ret);
1784 if (data->o_res.delegation_type != 0)
1785 nfs4_opendata_check_deleg(data, state);
1787 update_open_stateid(state, &data->o_res.stateid, NULL,
1789 atomic_inc(&state->count);
1794 static struct inode *
1795 nfs4_opendata_get_inode(struct nfs4_opendata *data)
1797 struct inode *inode;
1799 switch (data->o_arg.claim) {
1800 case NFS4_OPEN_CLAIM_NULL:
1801 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1802 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1803 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1804 return ERR_PTR(-EAGAIN);
1805 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1806 &data->f_attr, data->f_label);
1809 inode = d_inode(data->dentry);
1811 nfs_refresh_inode(inode, &data->f_attr);
1816 static struct nfs4_state *
1817 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
1819 struct nfs4_state *state;
1820 struct inode *inode;
1822 inode = nfs4_opendata_get_inode(data);
1824 return ERR_CAST(inode);
1825 if (data->state != NULL && data->state->inode == inode) {
1826 state = data->state;
1827 atomic_inc(&state->count);
1829 state = nfs4_get_open_state(inode, data->owner);
1832 state = ERR_PTR(-ENOMEM);
1836 static struct nfs4_state *
1837 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1839 struct nfs4_state *state;
1841 if (!data->rpc_done) {
1842 state = nfs4_try_open_cached(data);
1843 trace_nfs4_cached_open(data->state);
1847 state = nfs4_opendata_find_nfs4_state(data);
1851 if (data->o_res.delegation_type != 0)
1852 nfs4_opendata_check_deleg(data, state);
1853 update_open_stateid(state, &data->o_res.stateid, NULL,
1856 nfs_release_seqid(data->o_arg.seqid);
1860 static struct nfs4_state *
1861 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1863 struct nfs4_state *ret;
1865 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1866 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1868 ret = _nfs4_opendata_to_nfs4_state(data);
1869 nfs4_sequence_free_slot(&data->o_res.seq_res);
1873 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1875 struct nfs_inode *nfsi = NFS_I(state->inode);
1876 struct nfs_open_context *ctx;
1878 spin_lock(&state->inode->i_lock);
1879 list_for_each_entry(ctx, &nfsi->open_files, list) {
1880 if (ctx->state != state)
1882 get_nfs_open_context(ctx);
1883 spin_unlock(&state->inode->i_lock);
1886 spin_unlock(&state->inode->i_lock);
1887 return ERR_PTR(-ENOENT);
1890 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1891 struct nfs4_state *state, enum open_claim_type4 claim)
1893 struct nfs4_opendata *opendata;
1895 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1896 NULL, claim, GFP_NOFS);
1897 if (opendata == NULL)
1898 return ERR_PTR(-ENOMEM);
1899 opendata->state = state;
1900 atomic_inc(&state->count);
1904 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1907 struct nfs4_state *newstate;
1910 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1912 opendata->o_arg.open_flags = 0;
1913 opendata->o_arg.fmode = fmode;
1914 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1915 NFS_SB(opendata->dentry->d_sb),
1917 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1918 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1919 nfs4_init_opendata_res(opendata);
1920 ret = _nfs4_recover_proc_open(opendata);
1923 newstate = nfs4_opendata_to_nfs4_state(opendata);
1924 if (IS_ERR(newstate))
1925 return PTR_ERR(newstate);
1926 if (newstate != opendata->state)
1928 nfs4_close_state(newstate, fmode);
1932 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1936 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1937 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1938 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1939 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1940 /* memory barrier prior to reading state->n_* */
1941 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1942 clear_bit(NFS_OPEN_STATE, &state->flags);
1944 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1947 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1950 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1954 * We may have performed cached opens for all three recoveries.
1955 * Check if we need to update the current stateid.
1957 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1958 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1959 write_seqlock(&state->seqlock);
1960 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1961 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1962 write_sequnlock(&state->seqlock);
1969 * reclaim state on the server after a reboot.
1971 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1973 struct nfs_delegation *delegation;
1974 struct nfs4_opendata *opendata;
1975 fmode_t delegation_type = 0;
1978 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1979 NFS4_OPEN_CLAIM_PREVIOUS);
1980 if (IS_ERR(opendata))
1981 return PTR_ERR(opendata);
1983 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1984 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1985 delegation_type = delegation->type;
1987 opendata->o_arg.u.delegation_type = delegation_type;
1988 status = nfs4_open_recover(opendata, state);
1989 nfs4_opendata_put(opendata);
1993 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1995 struct nfs_server *server = NFS_SERVER(state->inode);
1996 struct nfs4_exception exception = { };
1999 err = _nfs4_do_open_reclaim(ctx, state);
2000 trace_nfs4_open_reclaim(ctx, 0, err);
2001 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2003 if (err != -NFS4ERR_DELAY)
2005 nfs4_handle_exception(server, err, &exception);
2006 } while (exception.retry);
2010 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2012 struct nfs_open_context *ctx;
2015 ctx = nfs4_state_find_open_context(state);
2018 ret = nfs4_do_open_reclaim(ctx, state);
2019 put_nfs_open_context(ctx);
2023 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err)
2027 printk(KERN_ERR "NFS: %s: unhandled error "
2028 "%d.\n", __func__, err);
2034 case -NFS4ERR_BADSESSION:
2035 case -NFS4ERR_BADSLOT:
2036 case -NFS4ERR_BAD_HIGH_SLOT:
2037 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2038 case -NFS4ERR_DEADSESSION:
2039 set_bit(NFS_DELEGATED_STATE, &state->flags);
2040 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
2042 case -NFS4ERR_STALE_CLIENTID:
2043 case -NFS4ERR_STALE_STATEID:
2044 set_bit(NFS_DELEGATED_STATE, &state->flags);
2045 /* Don't recall a delegation if it was lost */
2046 nfs4_schedule_lease_recovery(server->nfs_client);
2048 case -NFS4ERR_MOVED:
2049 nfs4_schedule_migration_recovery(server);
2051 case -NFS4ERR_LEASE_MOVED:
2052 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2054 case -NFS4ERR_DELEG_REVOKED:
2055 case -NFS4ERR_ADMIN_REVOKED:
2056 case -NFS4ERR_EXPIRED:
2057 case -NFS4ERR_BAD_STATEID:
2058 case -NFS4ERR_OPENMODE:
2059 nfs_inode_find_state_and_recover(state->inode,
2061 nfs4_schedule_stateid_recovery(server, state);
2063 case -NFS4ERR_DELAY:
2064 case -NFS4ERR_GRACE:
2065 set_bit(NFS_DELEGATED_STATE, &state->flags);
2069 case -NFS4ERR_DENIED:
2071 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2073 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2080 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2081 struct nfs4_state *state, const nfs4_stateid *stateid,
2084 struct nfs_server *server = NFS_SERVER(state->inode);
2085 struct nfs4_opendata *opendata;
2088 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2089 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2090 if (IS_ERR(opendata))
2091 return PTR_ERR(opendata);
2092 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2093 write_seqlock(&state->seqlock);
2094 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2095 write_sequnlock(&state->seqlock);
2096 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2097 switch (type & (FMODE_READ|FMODE_WRITE)) {
2098 case FMODE_READ|FMODE_WRITE:
2100 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2103 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2107 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2109 nfs4_opendata_put(opendata);
2110 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
2113 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2115 struct nfs4_opendata *data = calldata;
2117 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2118 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2121 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2123 struct nfs4_opendata *data = calldata;
2125 nfs40_sequence_done(task, &data->c_res.seq_res);
2127 data->rpc_status = task->tk_status;
2128 if (data->rpc_status == 0) {
2129 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2130 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2131 renew_lease(data->o_res.server, data->timestamp);
2132 data->rpc_done = true;
2136 static void nfs4_open_confirm_release(void *calldata)
2138 struct nfs4_opendata *data = calldata;
2139 struct nfs4_state *state = NULL;
2141 /* If this request hasn't been cancelled, do nothing */
2142 if (!data->cancelled)
2144 /* In case of error, no cleanup! */
2145 if (!data->rpc_done)
2147 state = nfs4_opendata_to_nfs4_state(data);
2149 nfs4_close_state(state, data->o_arg.fmode);
2151 nfs4_opendata_put(data);
2154 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2155 .rpc_call_prepare = nfs4_open_confirm_prepare,
2156 .rpc_call_done = nfs4_open_confirm_done,
2157 .rpc_release = nfs4_open_confirm_release,
2161 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2163 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2165 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2166 struct rpc_task *task;
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2169 .rpc_argp = &data->c_arg,
2170 .rpc_resp = &data->c_res,
2171 .rpc_cred = data->owner->so_cred,
2173 struct rpc_task_setup task_setup_data = {
2174 .rpc_client = server->client,
2175 .rpc_message = &msg,
2176 .callback_ops = &nfs4_open_confirm_ops,
2177 .callback_data = data,
2178 .workqueue = nfsiod_workqueue,
2179 .flags = RPC_TASK_ASYNC,
2183 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2184 kref_get(&data->kref);
2185 data->rpc_done = false;
2186 data->rpc_status = 0;
2187 data->timestamp = jiffies;
2188 if (data->is_recover)
2189 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2190 task = rpc_run_task(&task_setup_data);
2192 return PTR_ERR(task);
2193 status = rpc_wait_for_completion_task(task);
2195 data->cancelled = true;
2198 status = data->rpc_status;
2203 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2205 struct nfs4_opendata *data = calldata;
2206 struct nfs4_state_owner *sp = data->owner;
2207 struct nfs_client *clp = sp->so_server->nfs_client;
2208 enum open_claim_type4 claim = data->o_arg.claim;
2210 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2213 * Check if we still need to send an OPEN call, or if we can use
2214 * a delegation instead.
2216 if (data->state != NULL) {
2217 struct nfs_delegation *delegation;
2219 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2222 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2223 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2224 goto unlock_no_action;
2227 /* Update client id. */
2228 data->o_arg.clientid = clp->cl_clientid;
2232 case NFS4_OPEN_CLAIM_PREVIOUS:
2233 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2234 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2235 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2236 case NFS4_OPEN_CLAIM_FH:
2237 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2239 data->timestamp = jiffies;
2240 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2241 &data->o_arg.seq_args,
2242 &data->o_res.seq_res,
2244 nfs_release_seqid(data->o_arg.seqid);
2246 /* Set the create mode (note dependency on the session type) */
2247 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2248 if (data->o_arg.open_flags & O_EXCL) {
2249 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2250 if (nfs4_has_persistent_session(clp))
2251 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2252 else if (clp->cl_mvops->minor_version > 0)
2253 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2257 trace_nfs4_cached_open(data->state);
2260 task->tk_action = NULL;
2262 nfs4_sequence_done(task, &data->o_res.seq_res);
2265 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2267 struct nfs4_opendata *data = calldata;
2269 data->rpc_status = task->tk_status;
2271 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2274 if (task->tk_status == 0) {
2275 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2276 switch (data->o_res.f_attr->mode & S_IFMT) {
2280 data->rpc_status = -ELOOP;
2283 data->rpc_status = -EISDIR;
2286 data->rpc_status = -ENOTDIR;
2289 renew_lease(data->o_res.server, data->timestamp);
2290 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2291 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2293 data->rpc_done = true;
2296 static void nfs4_open_release(void *calldata)
2298 struct nfs4_opendata *data = calldata;
2299 struct nfs4_state *state = NULL;
2301 /* If this request hasn't been cancelled, do nothing */
2302 if (!data->cancelled)
2304 /* In case of error, no cleanup! */
2305 if (data->rpc_status != 0 || !data->rpc_done)
2307 /* In case we need an open_confirm, no cleanup! */
2308 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2310 state = nfs4_opendata_to_nfs4_state(data);
2312 nfs4_close_state(state, data->o_arg.fmode);
2314 nfs4_opendata_put(data);
2317 static const struct rpc_call_ops nfs4_open_ops = {
2318 .rpc_call_prepare = nfs4_open_prepare,
2319 .rpc_call_done = nfs4_open_done,
2320 .rpc_release = nfs4_open_release,
2323 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2325 struct inode *dir = d_inode(data->dir);
2326 struct nfs_server *server = NFS_SERVER(dir);
2327 struct nfs_openargs *o_arg = &data->o_arg;
2328 struct nfs_openres *o_res = &data->o_res;
2329 struct rpc_task *task;
2330 struct rpc_message msg = {
2331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2334 .rpc_cred = data->owner->so_cred,
2336 struct rpc_task_setup task_setup_data = {
2337 .rpc_client = server->client,
2338 .rpc_message = &msg,
2339 .callback_ops = &nfs4_open_ops,
2340 .callback_data = data,
2341 .workqueue = nfsiod_workqueue,
2342 .flags = RPC_TASK_ASYNC,
2346 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2347 kref_get(&data->kref);
2348 data->rpc_done = false;
2349 data->rpc_status = 0;
2350 data->cancelled = false;
2351 data->is_recover = false;
2353 nfs4_set_sequence_privileged(&o_arg->seq_args);
2354 data->is_recover = true;
2356 task = rpc_run_task(&task_setup_data);
2358 return PTR_ERR(task);
2359 status = rpc_wait_for_completion_task(task);
2361 data->cancelled = true;
2364 status = data->rpc_status;
2370 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2372 struct inode *dir = d_inode(data->dir);
2373 struct nfs_openres *o_res = &data->o_res;
2376 status = nfs4_run_open_task(data, 1);
2377 if (status != 0 || !data->rpc_done)
2380 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2382 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2383 status = _nfs4_proc_open_confirm(data);
2389 * Additional permission checks in order to distinguish between an
2390 * open for read, and an open for execute. This works around the
2391 * fact that NFSv4 OPEN treats read and execute permissions as being
2393 * Note that in the non-execute case, we want to turn off permission
2394 * checking if we just created a new file (POSIX open() semantics).
2396 static int nfs4_opendata_access(struct rpc_cred *cred,
2397 struct nfs4_opendata *opendata,
2398 struct nfs4_state *state, fmode_t fmode,
2401 struct nfs_access_entry cache;
2404 /* access call failed or for some reason the server doesn't
2405 * support any access modes -- defer access call until later */
2406 if (opendata->o_res.access_supported == 0)
2411 * Use openflags to check for exec, because fmode won't
2412 * always have FMODE_EXEC set when file open for exec.
2414 if (openflags & __FMODE_EXEC) {
2415 /* ONLY check for exec rights */
2416 if (S_ISDIR(state->inode->i_mode))
2417 mask = NFS4_ACCESS_LOOKUP;
2419 mask = NFS4_ACCESS_EXECUTE;
2420 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2421 mask = NFS4_ACCESS_READ;
2424 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2425 nfs_access_add_cache(state->inode, &cache);
2427 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2428 if ((mask & ~cache.mask & flags) == 0)
2435 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2437 static int _nfs4_proc_open(struct nfs4_opendata *data)
2439 struct inode *dir = d_inode(data->dir);
2440 struct nfs_server *server = NFS_SERVER(dir);
2441 struct nfs_openargs *o_arg = &data->o_arg;
2442 struct nfs_openres *o_res = &data->o_res;
2445 status = nfs4_run_open_task(data, 0);
2446 if (!data->rpc_done)
2449 if (status == -NFS4ERR_BADNAME &&
2450 !(o_arg->open_flags & O_CREAT))
2455 nfs_fattr_map_and_free_names(server, &data->f_attr);
2457 if (o_arg->open_flags & O_CREAT) {
2458 if (o_arg->open_flags & O_EXCL)
2459 data->file_created = true;
2460 else if (o_res->cinfo.before != o_res->cinfo.after)
2461 data->file_created = true;
2462 if (data->file_created ||
2463 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
2464 update_changeattr(dir, &o_res->cinfo,
2465 o_res->f_attr->time_start);
2467 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2468 server->caps &= ~NFS_CAP_POSIX_LOCK;
2469 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2470 status = _nfs4_proc_open_confirm(data);
2474 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2475 nfs4_sequence_free_slot(&o_res->seq_res);
2476 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2483 * reclaim state on the server after a network partition.
2484 * Assumes caller holds the appropriate lock
2486 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2488 struct nfs4_opendata *opendata;
2491 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2492 NFS4_OPEN_CLAIM_FH);
2493 if (IS_ERR(opendata))
2494 return PTR_ERR(opendata);
2495 ret = nfs4_open_recover(opendata, state);
2497 d_drop(ctx->dentry);
2498 nfs4_opendata_put(opendata);
2502 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2504 struct nfs_server *server = NFS_SERVER(state->inode);
2505 struct nfs4_exception exception = { };
2509 err = _nfs4_open_expired(ctx, state);
2510 trace_nfs4_open_expired(ctx, 0, err);
2511 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2516 case -NFS4ERR_GRACE:
2517 case -NFS4ERR_DELAY:
2518 nfs4_handle_exception(server, err, &exception);
2521 } while (exception.retry);
2526 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2528 struct nfs_open_context *ctx;
2531 ctx = nfs4_state_find_open_context(state);
2534 ret = nfs4_do_open_expired(ctx, state);
2535 put_nfs_open_context(ctx);
2539 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2540 const nfs4_stateid *stateid)
2542 nfs_remove_bad_delegation(state->inode, stateid);
2543 write_seqlock(&state->seqlock);
2544 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2545 write_sequnlock(&state->seqlock);
2546 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2549 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2551 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2552 nfs_finish_clear_delegation_stateid(state, NULL);
2555 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2557 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2558 nfs40_clear_delegation_stateid(state);
2559 return nfs4_open_expired(sp, state);
2562 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2563 nfs4_stateid *stateid,
2564 struct rpc_cred *cred)
2566 return -NFS4ERR_BAD_STATEID;
2569 #if defined(CONFIG_NFS_V4_1)
2570 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2571 nfs4_stateid *stateid,
2572 struct rpc_cred *cred)
2576 switch (stateid->type) {
2579 case NFS4_INVALID_STATEID_TYPE:
2580 case NFS4_SPECIAL_STATEID_TYPE:
2581 return -NFS4ERR_BAD_STATEID;
2582 case NFS4_REVOKED_STATEID_TYPE:
2586 status = nfs41_test_stateid(server, stateid, cred);
2588 case -NFS4ERR_EXPIRED:
2589 case -NFS4ERR_ADMIN_REVOKED:
2590 case -NFS4ERR_DELEG_REVOKED:
2596 /* Ack the revoked state to the server */
2597 nfs41_free_stateid(server, stateid, cred, true);
2598 return -NFS4ERR_EXPIRED;
2601 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2603 struct nfs_server *server = NFS_SERVER(state->inode);
2604 nfs4_stateid stateid;
2605 struct nfs_delegation *delegation;
2606 struct rpc_cred *cred;
2609 /* Get the delegation credential for use by test/free_stateid */
2611 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2612 if (delegation == NULL) {
2617 nfs4_stateid_copy(&stateid, &delegation->stateid);
2618 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2619 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2620 &delegation->flags)) {
2622 nfs_finish_clear_delegation_stateid(state, &stateid);
2626 cred = get_rpccred(delegation->cred);
2628 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2629 trace_nfs4_test_delegation_stateid(state, NULL, status);
2630 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2631 nfs_finish_clear_delegation_stateid(state, &stateid);
2637 * nfs41_check_expired_locks - possibly free a lock stateid
2639 * @state: NFSv4 state for an inode
2641 * Returns NFS_OK if recovery for this stateid is now finished.
2642 * Otherwise a negative NFS4ERR value is returned.
2644 static int nfs41_check_expired_locks(struct nfs4_state *state)
2646 int status, ret = NFS_OK;
2647 struct nfs4_lock_state *lsp, *prev = NULL;
2648 struct nfs_server *server = NFS_SERVER(state->inode);
2650 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2653 spin_lock(&state->state_lock);
2654 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2655 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2656 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2658 refcount_inc(&lsp->ls_count);
2659 spin_unlock(&state->state_lock);
2661 nfs4_put_lock_state(prev);
2664 status = nfs41_test_and_free_expired_stateid(server,
2667 trace_nfs4_test_lock_stateid(state, lsp, status);
2668 if (status == -NFS4ERR_EXPIRED ||
2669 status == -NFS4ERR_BAD_STATEID) {
2670 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2671 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2672 if (!recover_lost_locks)
2673 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2674 } else if (status != NFS_OK) {
2676 nfs4_put_lock_state(prev);
2679 spin_lock(&state->state_lock);
2682 spin_unlock(&state->state_lock);
2683 nfs4_put_lock_state(prev);
2689 * nfs41_check_open_stateid - possibly free an open stateid
2691 * @state: NFSv4 state for an inode
2693 * Returns NFS_OK if recovery for this stateid is now finished.
2694 * Otherwise a negative NFS4ERR value is returned.
2696 static int nfs41_check_open_stateid(struct nfs4_state *state)
2698 struct nfs_server *server = NFS_SERVER(state->inode);
2699 nfs4_stateid *stateid = &state->open_stateid;
2700 struct rpc_cred *cred = state->owner->so_cred;
2703 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2704 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2705 if (nfs4_have_delegation(state->inode, state->state))
2707 return -NFS4ERR_OPENMODE;
2709 return -NFS4ERR_BAD_STATEID;
2711 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2712 trace_nfs4_test_open_stateid(state, NULL, status);
2713 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2714 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2715 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2716 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2717 clear_bit(NFS_OPEN_STATE, &state->flags);
2718 stateid->type = NFS4_INVALID_STATEID_TYPE;
2721 if (nfs_open_stateid_recover_openmode(state))
2722 return -NFS4ERR_OPENMODE;
2726 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2730 nfs41_check_delegation_stateid(state);
2731 status = nfs41_check_expired_locks(state);
2732 if (status != NFS_OK)
2734 status = nfs41_check_open_stateid(state);
2735 if (status != NFS_OK)
2736 status = nfs4_open_expired(sp, state);
2742 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2743 * fields corresponding to attributes that were used to store the verifier.
2744 * Make sure we clobber those fields in the later setattr call
2746 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2747 struct iattr *sattr, struct nfs4_label **label)
2749 const u32 *attrset = opendata->o_res.attrset;
2751 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2752 !(sattr->ia_valid & ATTR_ATIME_SET))
2753 sattr->ia_valid |= ATTR_ATIME;
2755 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2756 !(sattr->ia_valid & ATTR_MTIME_SET))
2757 sattr->ia_valid |= ATTR_MTIME;
2759 /* Except MODE, it seems harmless of setting twice. */
2760 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2761 (attrset[1] & FATTR4_WORD1_MODE ||
2762 attrset[2] & FATTR4_WORD2_MODE_UMASK))
2763 sattr->ia_valid &= ~ATTR_MODE;
2765 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2769 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2772 struct nfs_open_context *ctx)
2774 struct nfs4_state_owner *sp = opendata->owner;
2775 struct nfs_server *server = sp->so_server;
2776 struct dentry *dentry;
2777 struct nfs4_state *state;
2781 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2783 ret = _nfs4_proc_open(opendata);
2787 state = nfs4_opendata_to_nfs4_state(opendata);
2788 ret = PTR_ERR(state);
2792 if (server->caps & NFS_CAP_POSIX_LOCK)
2793 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2794 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2795 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2797 dentry = opendata->dentry;
2798 if (d_really_is_negative(dentry)) {
2799 struct dentry *alias;
2801 alias = d_exact_alias(dentry, state->inode);
2803 alias = d_splice_alias(igrab(state->inode), dentry);
2804 /* d_splice_alias() can't fail here - it's a non-directory */
2807 ctx->dentry = dentry = alias;
2809 nfs_set_verifier(dentry,
2810 nfs_save_change_attribute(d_inode(opendata->dir)));
2813 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2817 if (d_inode(dentry) == state->inode) {
2818 nfs_inode_attach_open_context(ctx);
2819 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2820 nfs4_schedule_stateid_recovery(server, state);
2827 * Returns a referenced nfs4_state
2829 static int _nfs4_do_open(struct inode *dir,
2830 struct nfs_open_context *ctx,
2832 const struct nfs4_open_createattrs *c,
2835 struct nfs4_state_owner *sp;
2836 struct nfs4_state *state = NULL;
2837 struct nfs_server *server = NFS_SERVER(dir);
2838 struct nfs4_opendata *opendata;
2839 struct dentry *dentry = ctx->dentry;
2840 struct rpc_cred *cred = ctx->cred;
2841 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2842 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2843 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2844 struct iattr *sattr = c->sattr;
2845 struct nfs4_label *label = c->label;
2846 struct nfs4_label *olabel = NULL;
2849 /* Protect against reboot recovery conflicts */
2851 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2853 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2856 status = nfs4_client_recover_expired_lease(server->nfs_client);
2858 goto err_put_state_owner;
2859 if (d_really_is_positive(dentry))
2860 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2862 if (d_really_is_positive(dentry))
2863 claim = NFS4_OPEN_CLAIM_FH;
2864 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
2865 c, claim, GFP_KERNEL);
2866 if (opendata == NULL)
2867 goto err_put_state_owner;
2870 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2871 if (IS_ERR(olabel)) {
2872 status = PTR_ERR(olabel);
2873 goto err_opendata_put;
2877 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2878 if (!opendata->f_attr.mdsthreshold) {
2879 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2880 if (!opendata->f_attr.mdsthreshold)
2881 goto err_free_label;
2883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2885 if (d_really_is_positive(dentry))
2886 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2888 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2890 goto err_free_label;
2893 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2894 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2895 nfs4_exclusive_attrset(opendata, sattr, &label);
2897 * send create attributes which was not set by open
2898 * with an extra setattr.
2900 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2901 nfs_fattr_init(opendata->o_res.f_attr);
2902 status = nfs4_do_setattr(state->inode, cred,
2903 opendata->o_res.f_attr, sattr,
2904 ctx, label, olabel);
2906 nfs_setattr_update_inode(state->inode, sattr,
2907 opendata->o_res.f_attr);
2908 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2912 if (opened && opendata->file_created)
2913 *opened |= FILE_CREATED;
2915 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2916 *ctx_th = opendata->f_attr.mdsthreshold;
2917 opendata->f_attr.mdsthreshold = NULL;
2920 nfs4_label_free(olabel);
2922 nfs4_opendata_put(opendata);
2923 nfs4_put_state_owner(sp);
2926 nfs4_label_free(olabel);
2928 nfs4_opendata_put(opendata);
2929 err_put_state_owner:
2930 nfs4_put_state_owner(sp);
2936 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2937 struct nfs_open_context *ctx,
2939 struct iattr *sattr,
2940 struct nfs4_label *label,
2943 struct nfs_server *server = NFS_SERVER(dir);
2944 struct nfs4_exception exception = { };
2945 struct nfs4_state *res;
2946 struct nfs4_open_createattrs c = {
2950 [0] = (__u32)jiffies,
2951 [1] = (__u32)current->pid,
2957 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
2959 trace_nfs4_open_file(ctx, flags, status);
2962 /* NOTE: BAD_SEQID means the server and client disagree about the
2963 * book-keeping w.r.t. state-changing operations
2964 * (OPEN/CLOSE/LOCK/LOCKU...)
2965 * It is actually a sign of a bug on the client or on the server.
2967 * If we receive a BAD_SEQID error in the particular case of
2968 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2969 * have unhashed the old state_owner for us, and that we can
2970 * therefore safely retry using a new one. We should still warn
2971 * the user though...
2973 if (status == -NFS4ERR_BAD_SEQID) {
2974 pr_warn_ratelimited("NFS: v4 server %s "
2975 " returned a bad sequence-id error!\n",
2976 NFS_SERVER(dir)->nfs_client->cl_hostname);
2977 exception.retry = 1;
2981 * BAD_STATEID on OPEN means that the server cancelled our
2982 * state before it received the OPEN_CONFIRM.
2983 * Recover by retrying the request as per the discussion
2984 * on Page 181 of RFC3530.
2986 if (status == -NFS4ERR_BAD_STATEID) {
2987 exception.retry = 1;
2990 if (status == -EAGAIN) {
2991 /* We must have found a delegation */
2992 exception.retry = 1;
2995 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2997 res = ERR_PTR(nfs4_handle_exception(server,
2998 status, &exception));
2999 } while (exception.retry);
3003 static int _nfs4_do_setattr(struct inode *inode,
3004 struct nfs_setattrargs *arg,
3005 struct nfs_setattrres *res,
3006 struct rpc_cred *cred,
3007 struct nfs_open_context *ctx)
3009 struct nfs_server *server = NFS_SERVER(inode);
3010 struct rpc_message msg = {
3011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
3016 struct rpc_cred *delegation_cred = NULL;
3017 unsigned long timestamp = jiffies;
3022 nfs_fattr_init(res->fattr);
3024 /* Servers should only apply open mode checks for file size changes */
3025 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
3026 fmode = truncate ? FMODE_WRITE : FMODE_READ;
3028 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
3029 /* Use that stateid */
3030 } else if (truncate && ctx != NULL) {
3031 struct nfs_lock_context *l_ctx;
3032 if (!nfs4_valid_open_stateid(ctx->state))
3034 l_ctx = nfs_get_lock_context(ctx);
3036 return PTR_ERR(l_ctx);
3037 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3038 &arg->stateid, &delegation_cred);
3039 nfs_put_lock_context(l_ctx);
3043 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
3044 if (delegation_cred)
3045 msg.rpc_cred = delegation_cred;
3047 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
3049 put_rpccred(delegation_cred);
3050 if (status == 0 && ctx != NULL)
3051 renew_lease(server, timestamp);
3052 trace_nfs4_setattr(inode, &arg->stateid, status);
3056 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
3057 struct nfs_fattr *fattr, struct iattr *sattr,
3058 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
3059 struct nfs4_label *olabel)
3061 struct nfs_server *server = NFS_SERVER(inode);
3062 struct nfs4_state *state = ctx ? ctx->state : NULL;
3063 struct nfs_setattrargs arg = {
3064 .fh = NFS_FH(inode),
3067 .bitmask = server->attr_bitmask,
3070 struct nfs_setattrres res = {
3075 struct nfs4_exception exception = {
3078 .stateid = &arg.stateid,
3082 arg.bitmask = nfs4_bitmask(server, ilabel);
3084 arg.bitmask = nfs4_bitmask(server, olabel);
3087 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3089 case -NFS4ERR_OPENMODE:
3090 if (!(sattr->ia_valid & ATTR_SIZE)) {
3091 pr_warn_once("NFSv4: server %s is incorrectly "
3092 "applying open mode checks to "
3093 "a SETATTR that is not "
3094 "changing file size.\n",
3095 server->nfs_client->cl_hostname);
3097 if (state && !(state->state & FMODE_WRITE)) {
3099 if (sattr->ia_valid & ATTR_OPEN)
3104 err = nfs4_handle_exception(server, err, &exception);
3105 } while (exception.retry);
3111 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3113 if (inode == NULL || !nfs_have_layout(inode))
3116 return pnfs_wait_on_layoutreturn(inode, task);
3119 struct nfs4_closedata {
3120 struct inode *inode;
3121 struct nfs4_state *state;
3122 struct nfs_closeargs arg;
3123 struct nfs_closeres res;
3125 struct nfs4_layoutreturn_args arg;
3126 struct nfs4_layoutreturn_res res;
3127 struct nfs4_xdr_opaque_data ld_private;
3131 struct nfs_fattr fattr;
3132 unsigned long timestamp;
3135 static void nfs4_free_closedata(void *data)
3137 struct nfs4_closedata *calldata = data;
3138 struct nfs4_state_owner *sp = calldata->state->owner;
3139 struct super_block *sb = calldata->state->inode->i_sb;
3141 if (calldata->lr.roc)
3142 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3143 calldata->res.lr_ret);
3144 nfs4_put_open_state(calldata->state);
3145 nfs_free_seqid(calldata->arg.seqid);
3146 nfs4_put_state_owner(sp);
3147 nfs_sb_deactive(sb);
3151 static void nfs4_close_done(struct rpc_task *task, void *data)
3153 struct nfs4_closedata *calldata = data;
3154 struct nfs4_state *state = calldata->state;
3155 struct nfs_server *server = NFS_SERVER(calldata->inode);
3156 nfs4_stateid *res_stateid = NULL;
3157 struct nfs4_exception exception = {
3159 .inode = calldata->inode,
3160 .stateid = &calldata->arg.stateid,
3163 dprintk("%s: begin!\n", __func__);
3164 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3166 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3168 /* Handle Layoutreturn errors */
3169 if (calldata->arg.lr_args && task->tk_status != 0) {
3170 switch (calldata->res.lr_ret) {
3172 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3175 calldata->arg.lr_args = NULL;
3176 calldata->res.lr_res = NULL;
3178 case -NFS4ERR_OLD_STATEID:
3179 if (nfs4_refresh_layout_stateid(&calldata->arg.lr_args->stateid,
3183 case -NFS4ERR_ADMIN_REVOKED:
3184 case -NFS4ERR_DELEG_REVOKED:
3185 case -NFS4ERR_EXPIRED:
3186 case -NFS4ERR_BAD_STATEID:
3187 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3188 case -NFS4ERR_WRONG_CRED:
3189 calldata->arg.lr_args = NULL;
3190 calldata->res.lr_res = NULL;
3195 /* hmm. we are done with the inode, and in the process of freeing
3196 * the state_owner. we keep this around to process errors
3198 switch (task->tk_status) {
3200 res_stateid = &calldata->res.stateid;
3201 renew_lease(server, calldata->timestamp);
3203 case -NFS4ERR_ACCESS:
3204 if (calldata->arg.bitmask != NULL) {
3205 calldata->arg.bitmask = NULL;
3206 calldata->res.fattr = NULL;
3211 case -NFS4ERR_OLD_STATEID:
3212 /* Did we race with OPEN? */
3213 if (nfs4_refresh_open_stateid(&calldata->arg.stateid,
3217 case -NFS4ERR_ADMIN_REVOKED:
3218 case -NFS4ERR_STALE_STATEID:
3219 case -NFS4ERR_EXPIRED:
3220 nfs4_free_revoked_stateid(server,
3221 &calldata->arg.stateid,
3222 task->tk_msg.rpc_cred);
3224 case -NFS4ERR_BAD_STATEID:
3227 task->tk_status = nfs4_async_handle_exception(task,
3228 server, task->tk_status, &exception);
3229 if (exception.retry)
3232 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3233 res_stateid, calldata->arg.fmode);
3235 task->tk_status = 0;
3236 nfs_release_seqid(calldata->arg.seqid);
3237 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3238 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3241 calldata->res.lr_ret = 0;
3243 task->tk_status = 0;
3244 rpc_restart_call_prepare(task);
3248 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3250 struct nfs4_closedata *calldata = data;
3251 struct nfs4_state *state = calldata->state;
3252 struct inode *inode = calldata->inode;
3253 bool is_rdonly, is_wronly, is_rdwr;
3256 dprintk("%s: begin!\n", __func__);
3257 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3260 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3261 spin_lock(&state->owner->so_lock);
3262 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3263 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3264 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3265 /* Calculate the change in open mode */
3266 calldata->arg.fmode = 0;
3267 if (state->n_rdwr == 0) {
3268 if (state->n_rdonly == 0)
3269 call_close |= is_rdonly;
3271 calldata->arg.fmode |= FMODE_READ;
3272 if (state->n_wronly == 0)
3273 call_close |= is_wronly;
3275 calldata->arg.fmode |= FMODE_WRITE;
3276 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3277 call_close |= is_rdwr;
3279 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3281 if (!nfs4_valid_open_stateid(state) ||
3282 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state))
3284 spin_unlock(&state->owner->so_lock);
3287 /* Note: exit _without_ calling nfs4_close_done */
3291 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3292 nfs_release_seqid(calldata->arg.seqid);
3296 if (calldata->arg.fmode == 0)
3297 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3299 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3300 /* Close-to-open cache consistency revalidation */
3301 if (!nfs4_have_delegation(inode, FMODE_READ))
3302 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3304 calldata->arg.bitmask = NULL;
3307 calldata->arg.share_access =
3308 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3309 calldata->arg.fmode, 0);
3311 if (calldata->res.fattr == NULL)
3312 calldata->arg.bitmask = NULL;
3313 else if (calldata->arg.bitmask == NULL)
3314 calldata->res.fattr = NULL;
3315 calldata->timestamp = jiffies;
3316 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3317 &calldata->arg.seq_args,
3318 &calldata->res.seq_res,
3320 nfs_release_seqid(calldata->arg.seqid);
3321 dprintk("%s: done!\n", __func__);
3324 task->tk_action = NULL;
3326 nfs4_sequence_done(task, &calldata->res.seq_res);
3329 static const struct rpc_call_ops nfs4_close_ops = {
3330 .rpc_call_prepare = nfs4_close_prepare,
3331 .rpc_call_done = nfs4_close_done,
3332 .rpc_release = nfs4_free_closedata,
3336 * It is possible for data to be read/written from a mem-mapped file
3337 * after the sys_close call (which hits the vfs layer as a flush).
3338 * This means that we can't safely call nfsv4 close on a file until
3339 * the inode is cleared. This in turn means that we are not good
3340 * NFSv4 citizens - we do not indicate to the server to update the file's
3341 * share state even when we are done with one of the three share
3342 * stateid's in the inode.
3344 * NOTE: Caller must be holding the sp->so_owner semaphore!
3346 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3348 struct nfs_server *server = NFS_SERVER(state->inode);
3349 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3350 struct nfs4_closedata *calldata;
3351 struct nfs4_state_owner *sp = state->owner;
3352 struct rpc_task *task;
3353 struct rpc_message msg = {
3354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3355 .rpc_cred = state->owner->so_cred,
3357 struct rpc_task_setup task_setup_data = {
3358 .rpc_client = server->client,
3359 .rpc_message = &msg,
3360 .callback_ops = &nfs4_close_ops,
3361 .workqueue = nfsiod_workqueue,
3362 .flags = RPC_TASK_ASYNC,
3364 int status = -ENOMEM;
3366 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3367 &task_setup_data.rpc_client, &msg);
3369 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3370 if (calldata == NULL)
3372 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3373 calldata->inode = state->inode;
3374 calldata->state = state;
3375 calldata->arg.fh = NFS_FH(state->inode);
3376 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3377 goto out_free_calldata;
3378 /* Serialization for the sequence id */
3379 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3380 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3381 if (IS_ERR(calldata->arg.seqid))
3382 goto out_free_calldata;
3383 nfs_fattr_init(&calldata->fattr);
3384 calldata->arg.fmode = 0;
3385 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3386 calldata->res.fattr = &calldata->fattr;
3387 calldata->res.seqid = calldata->arg.seqid;
3388 calldata->res.server = server;
3389 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3390 calldata->lr.roc = pnfs_roc(state->inode,
3391 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3392 if (calldata->lr.roc) {
3393 calldata->arg.lr_args = &calldata->lr.arg;
3394 calldata->res.lr_res = &calldata->lr.res;
3396 nfs_sb_active(calldata->inode->i_sb);
3398 msg.rpc_argp = &calldata->arg;
3399 msg.rpc_resp = &calldata->res;
3400 task_setup_data.callback_data = calldata;
3401 task = rpc_run_task(&task_setup_data);
3403 return PTR_ERR(task);
3406 status = rpc_wait_for_completion_task(task);
3412 nfs4_put_open_state(state);
3413 nfs4_put_state_owner(sp);
3417 static struct inode *
3418 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3419 int open_flags, struct iattr *attr, int *opened)
3421 struct nfs4_state *state;
3422 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3424 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3426 /* Protect against concurrent sillydeletes */
3427 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3429 nfs4_label_release_security(label);
3432 return ERR_CAST(state);
3433 return state->inode;
3436 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3438 if (ctx->state == NULL)
3441 nfs4_close_sync(ctx->state, ctx->mode);
3443 nfs4_close_state(ctx->state, ctx->mode);
3446 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3447 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3448 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3450 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3452 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3453 struct nfs4_server_caps_arg args = {
3457 struct nfs4_server_caps_res res = {};
3458 struct rpc_message msg = {
3459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3466 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3467 FATTR4_WORD0_FH_EXPIRE_TYPE |
3468 FATTR4_WORD0_LINK_SUPPORT |
3469 FATTR4_WORD0_SYMLINK_SUPPORT |
3470 FATTR4_WORD0_ACLSUPPORT;
3472 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3474 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3476 /* Sanity check the server answers */
3477 switch (minorversion) {
3479 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3480 res.attr_bitmask[2] = 0;
3483 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3486 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3488 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3489 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3490 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3491 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3492 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3493 NFS_CAP_CTIME|NFS_CAP_MTIME|
3494 NFS_CAP_SECURITY_LABEL);
3495 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3496 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3497 server->caps |= NFS_CAP_ACLS;
3498 if (res.has_links != 0)
3499 server->caps |= NFS_CAP_HARDLINKS;
3500 if (res.has_symlinks != 0)
3501 server->caps |= NFS_CAP_SYMLINKS;
3502 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3503 server->caps |= NFS_CAP_FILEID;
3504 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3505 server->caps |= NFS_CAP_MODE;
3506 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3507 server->caps |= NFS_CAP_NLINK;
3508 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3509 server->caps |= NFS_CAP_OWNER;
3510 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3511 server->caps |= NFS_CAP_OWNER_GROUP;
3512 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3513 server->caps |= NFS_CAP_ATIME;
3514 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3515 server->caps |= NFS_CAP_CTIME;
3516 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3517 server->caps |= NFS_CAP_MTIME;
3518 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3519 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3520 server->caps |= NFS_CAP_SECURITY_LABEL;
3522 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3523 sizeof(server->attr_bitmask));
3524 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3526 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3527 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3528 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3529 server->cache_consistency_bitmask[2] = 0;
3531 /* Avoid a regression due to buggy server */
3532 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3533 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3534 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3535 sizeof(server->exclcreat_bitmask));
3537 server->acl_bitmask = res.acl_bitmask;
3538 server->fh_expire_type = res.fh_expire_type;
3544 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3546 struct nfs4_exception exception = { };
3549 err = nfs4_handle_exception(server,
3550 _nfs4_server_capabilities(server, fhandle),
3552 } while (exception.retry);
3556 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3557 struct nfs_fsinfo *info)
3560 struct nfs4_lookup_root_arg args = {
3563 struct nfs4_lookup_res res = {
3565 .fattr = info->fattr,
3568 struct rpc_message msg = {
3569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3574 bitmask[0] = nfs4_fattr_bitmap[0];
3575 bitmask[1] = nfs4_fattr_bitmap[1];
3577 * Process the label in the upcoming getfattr
3579 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3581 nfs_fattr_init(info->fattr);
3582 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3585 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3586 struct nfs_fsinfo *info)
3588 struct nfs4_exception exception = { };
3591 err = _nfs4_lookup_root(server, fhandle, info);
3592 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3595 case -NFS4ERR_WRONGSEC:
3598 err = nfs4_handle_exception(server, err, &exception);
3600 } while (exception.retry);
3605 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3606 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3608 struct rpc_auth_create_args auth_args = {
3609 .pseudoflavor = flavor,
3611 struct rpc_auth *auth;
3613 auth = rpcauth_create(&auth_args, server->client);
3616 return nfs4_lookup_root(server, fhandle, info);
3620 * Retry pseudoroot lookup with various security flavors. We do this when:
3622 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3623 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3625 * Returns zero on success, or a negative NFS4ERR value, or a
3626 * negative errno value.
3628 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3629 struct nfs_fsinfo *info)
3631 /* Per 3530bis 15.33.5 */
3632 static const rpc_authflavor_t flav_array[] = {
3636 RPC_AUTH_UNIX, /* courtesy */
3639 int status = -EPERM;
3642 if (server->auth_info.flavor_len > 0) {
3643 /* try each flavor specified by user */
3644 for (i = 0; i < server->auth_info.flavor_len; i++) {
3645 status = nfs4_lookup_root_sec(server, fhandle, info,
3646 server->auth_info.flavors[i]);
3647 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3652 /* no flavors specified by user, try default list */
3653 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3654 status = nfs4_lookup_root_sec(server, fhandle, info,
3656 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3663 * -EACCESS could mean that the user doesn't have correct permissions
3664 * to access the mount. It could also mean that we tried to mount
3665 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3666 * existing mount programs don't handle -EACCES very well so it should
3667 * be mapped to -EPERM instead.
3669 if (status == -EACCES)
3675 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3676 * @server: initialized nfs_server handle
3677 * @fhandle: we fill in the pseudo-fs root file handle
3678 * @info: we fill in an FSINFO struct
3679 * @auth_probe: probe the auth flavours
3681 * Returns zero on success, or a negative errno.
3683 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3684 struct nfs_fsinfo *info,
3690 status = nfs4_lookup_root(server, fhandle, info);
3692 if (auth_probe || status == NFS4ERR_WRONGSEC)
3693 status = server->nfs_client->cl_mvops->find_root_sec(server,
3697 status = nfs4_server_capabilities(server, fhandle);
3699 status = nfs4_do_fsinfo(server, fhandle, info);
3701 return nfs4_map_errors(status);
3704 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3705 struct nfs_fsinfo *info)
3708 struct nfs_fattr *fattr = info->fattr;
3709 struct nfs4_label *label = NULL;
3711 error = nfs4_server_capabilities(server, mntfh);
3713 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3717 label = nfs4_label_alloc(server, GFP_KERNEL);
3719 return PTR_ERR(label);
3721 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3723 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3724 goto err_free_label;
3727 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3728 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3729 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3732 nfs4_label_free(label);
3738 * Get locations and (maybe) other attributes of a referral.
3739 * Note that we'll actually follow the referral later when
3740 * we detect fsid mismatch in inode revalidation
3742 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3743 const struct qstr *name, struct nfs_fattr *fattr,
3744 struct nfs_fh *fhandle)
3746 int status = -ENOMEM;
3747 struct page *page = NULL;
3748 struct nfs4_fs_locations *locations = NULL;
3750 page = alloc_page(GFP_KERNEL);
3753 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3754 if (locations == NULL)
3757 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3762 * If the fsid didn't change, this is a migration event, not a
3763 * referral. Cause us to drop into the exception handler, which
3764 * will kick off migration recovery.
3766 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3767 dprintk("%s: server did not return a different fsid for"
3768 " a referral at %s\n", __func__, name->name);
3769 status = -NFS4ERR_MOVED;
3772 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3773 nfs_fixup_referral_attributes(&locations->fattr);
3775 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3776 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3777 memset(fhandle, 0, sizeof(struct nfs_fh));
3785 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3786 struct nfs_fattr *fattr, struct nfs4_label *label)
3788 struct nfs4_getattr_arg args = {
3790 .bitmask = server->attr_bitmask,
3792 struct nfs4_getattr_res res = {
3797 struct rpc_message msg = {
3798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3803 args.bitmask = nfs4_bitmask(server, label);
3805 nfs_fattr_init(fattr);
3806 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3809 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3810 struct nfs_fattr *fattr, struct nfs4_label *label)
3812 struct nfs4_exception exception = { };
3815 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3816 trace_nfs4_getattr(server, fhandle, fattr, err);
3817 err = nfs4_handle_exception(server, err,
3819 } while (exception.retry);
3824 * The file is not closed if it is opened due to the a request to change
3825 * the size of the file. The open call will not be needed once the
3826 * VFS layer lookup-intents are implemented.
3828 * Close is called when the inode is destroyed.
3829 * If we haven't opened the file for O_WRONLY, we
3830 * need to in the size_change case to obtain a stateid.
3833 * Because OPEN is always done by name in nfsv4, it is
3834 * possible that we opened a different file by the same
3835 * name. We can recognize this race condition, but we
3836 * can't do anything about it besides returning an error.
3838 * This will be fixed with VFS changes (lookup-intent).
3841 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3842 struct iattr *sattr)
3844 struct inode *inode = d_inode(dentry);
3845 struct rpc_cred *cred = NULL;
3846 struct nfs_open_context *ctx = NULL;
3847 struct nfs4_label *label = NULL;
3850 if (pnfs_ld_layoutret_on_setattr(inode) &&
3851 sattr->ia_valid & ATTR_SIZE &&
3852 sattr->ia_size < i_size_read(inode))
3853 pnfs_commit_and_return_layout(inode);
3855 nfs_fattr_init(fattr);
3857 /* Deal with open(O_TRUNC) */
3858 if (sattr->ia_valid & ATTR_OPEN)
3859 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3861 /* Optimization: if the end result is no change, don't RPC */
3862 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3865 /* Search for an existing open(O_WRITE) file */
3866 if (sattr->ia_valid & ATTR_FILE) {
3868 ctx = nfs_file_open_context(sattr->ia_file);
3873 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3875 return PTR_ERR(label);
3877 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3879 nfs_setattr_update_inode(inode, sattr, fattr);
3880 nfs_setsecurity(inode, fattr, label);
3882 nfs4_label_free(label);
3886 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3887 const struct qstr *name, struct nfs_fh *fhandle,
3888 struct nfs_fattr *fattr, struct nfs4_label *label)
3890 struct nfs_server *server = NFS_SERVER(dir);
3892 struct nfs4_lookup_arg args = {
3893 .bitmask = server->attr_bitmask,
3894 .dir_fh = NFS_FH(dir),
3897 struct nfs4_lookup_res res = {
3903 struct rpc_message msg = {
3904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3909 args.bitmask = nfs4_bitmask(server, label);
3911 nfs_fattr_init(fattr);
3913 dprintk("NFS call lookup %s\n", name->name);
3914 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3915 dprintk("NFS reply lookup: %d\n", status);
3919 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3921 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3922 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3923 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3927 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3928 const struct qstr *name, struct nfs_fh *fhandle,
3929 struct nfs_fattr *fattr, struct nfs4_label *label)
3931 struct nfs4_exception exception = { };
3932 struct rpc_clnt *client = *clnt;
3935 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3936 trace_nfs4_lookup(dir, name, err);
3938 case -NFS4ERR_BADNAME:
3941 case -NFS4ERR_MOVED:
3942 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3943 if (err == -NFS4ERR_MOVED)
3944 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3946 case -NFS4ERR_WRONGSEC:
3948 if (client != *clnt)
3950 client = nfs4_negotiate_security(client, dir, name);
3952 return PTR_ERR(client);
3954 exception.retry = 1;
3957 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3959 } while (exception.retry);
3964 else if (client != *clnt)
3965 rpc_shutdown_client(client);
3970 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3971 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3972 struct nfs4_label *label)
3975 struct rpc_clnt *client = NFS_CLIENT(dir);
3977 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3978 if (client != NFS_CLIENT(dir)) {
3979 rpc_shutdown_client(client);
3980 nfs_fixup_secinfo_attributes(fattr);
3986 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3987 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3989 struct rpc_clnt *client = NFS_CLIENT(dir);
3992 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3994 return ERR_PTR(status);
3995 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3998 static int _nfs4_proc_lookupp(struct inode *inode,
3999 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4000 struct nfs4_label *label)
4002 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4003 struct nfs_server *server = NFS_SERVER(inode);
4005 struct nfs4_lookupp_arg args = {
4006 .bitmask = server->attr_bitmask,
4007 .fh = NFS_FH(inode),
4009 struct nfs4_lookupp_res res = {
4015 struct rpc_message msg = {
4016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4021 args.bitmask = nfs4_bitmask(server, label);
4023 nfs_fattr_init(fattr);
4025 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4026 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4028 dprintk("NFS reply lookupp: %d\n", status);
4032 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4033 struct nfs_fattr *fattr, struct nfs4_label *label)
4035 struct nfs4_exception exception = { };
4038 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4039 trace_nfs4_lookupp(inode, err);
4040 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4042 } while (exception.retry);
4046 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4048 struct nfs_server *server = NFS_SERVER(inode);
4049 struct nfs4_accessargs args = {
4050 .fh = NFS_FH(inode),
4051 .bitmask = server->cache_consistency_bitmask,
4052 .access = entry->mask,
4054 struct nfs4_accessres res = {
4057 struct rpc_message msg = {
4058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4061 .rpc_cred = entry->cred,
4065 res.fattr = nfs_alloc_fattr();
4066 if (res.fattr == NULL)
4069 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4071 nfs_access_set_mask(entry, res.access);
4072 nfs_refresh_inode(inode, res.fattr);
4074 nfs_free_fattr(res.fattr);
4078 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4080 struct nfs4_exception exception = { };
4083 err = _nfs4_proc_access(inode, entry);
4084 trace_nfs4_access(inode, err);
4085 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4087 } while (exception.retry);
4092 * TODO: For the time being, we don't try to get any attributes
4093 * along with any of the zero-copy operations READ, READDIR,
4096 * In the case of the first three, we want to put the GETATTR
4097 * after the read-type operation -- this is because it is hard
4098 * to predict the length of a GETATTR response in v4, and thus
4099 * align the READ data correctly. This means that the GETATTR
4100 * may end up partially falling into the page cache, and we should
4101 * shift it into the 'tail' of the xdr_buf before processing.
4102 * To do this efficiently, we need to know the total length
4103 * of data received, which doesn't seem to be available outside
4106 * In the case of WRITE, we also want to put the GETATTR after
4107 * the operation -- in this case because we want to make sure
4108 * we get the post-operation mtime and size.
4110 * Both of these changes to the XDR layer would in fact be quite
4111 * minor, but I decided to leave them for a subsequent patch.
4113 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4114 unsigned int pgbase, unsigned int pglen)
4116 struct nfs4_readlink args = {
4117 .fh = NFS_FH(inode),
4122 struct nfs4_readlink_res res;
4123 struct rpc_message msg = {
4124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4129 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4132 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4133 unsigned int pgbase, unsigned int pglen)
4135 struct nfs4_exception exception = { };
4138 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4139 trace_nfs4_readlink(inode, err);
4140 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4142 } while (exception.retry);
4147 * This is just for mknod. open(O_CREAT) will always do ->open_context().
4150 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4153 struct nfs_server *server = NFS_SERVER(dir);
4154 struct nfs4_label l, *ilabel = NULL;
4155 struct nfs_open_context *ctx;
4156 struct nfs4_state *state;
4159 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4161 return PTR_ERR(ctx);
4163 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4165 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4166 sattr->ia_mode &= ~current_umask();
4167 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4168 if (IS_ERR(state)) {
4169 status = PTR_ERR(state);
4173 nfs4_label_release_security(ilabel);
4174 put_nfs_open_context(ctx);
4178 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4180 struct nfs_server *server = NFS_SERVER(dir);
4181 struct nfs_removeargs args = {
4185 struct nfs_removeres res = {
4188 struct rpc_message msg = {
4189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4193 unsigned long timestamp = jiffies;
4196 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4198 update_changeattr(dir, &res.cinfo, timestamp);
4202 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4204 struct nfs4_exception exception = { };
4207 err = _nfs4_proc_remove(dir, name);
4208 trace_nfs4_remove(dir, name, err);
4209 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4211 } while (exception.retry);
4215 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
4217 struct nfs_server *server = NFS_SERVER(dir);
4218 struct nfs_removeargs *args = msg->rpc_argp;
4219 struct nfs_removeres *res = msg->rpc_resp;
4221 res->server = server;
4222 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4223 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
4225 nfs_fattr_init(res->dir_attr);
4228 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4230 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4231 &data->args.seq_args,
4236 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4238 struct nfs_unlinkdata *data = task->tk_calldata;
4239 struct nfs_removeres *res = &data->res;
4241 if (!nfs4_sequence_done(task, &res->seq_res))
4243 if (nfs4_async_handle_error(task, res->server, NULL,
4244 &data->timeout) == -EAGAIN)
4246 if (task->tk_status == 0)
4247 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4251 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4253 struct nfs_server *server = NFS_SERVER(dir);
4254 struct nfs_renameargs *arg = msg->rpc_argp;
4255 struct nfs_renameres *res = msg->rpc_resp;
4257 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4258 res->server = server;
4259 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4262 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4264 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4265 &data->args.seq_args,
4270 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4271 struct inode *new_dir)
4273 struct nfs_renamedata *data = task->tk_calldata;
4274 struct nfs_renameres *res = &data->res;
4276 if (!nfs4_sequence_done(task, &res->seq_res))
4278 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4281 if (task->tk_status == 0) {
4282 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4283 if (new_dir != old_dir)
4284 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4289 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4291 struct nfs_server *server = NFS_SERVER(inode);
4292 struct nfs4_link_arg arg = {
4293 .fh = NFS_FH(inode),
4294 .dir_fh = NFS_FH(dir),
4296 .bitmask = server->attr_bitmask,
4298 struct nfs4_link_res res = {
4302 struct rpc_message msg = {
4303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4307 int status = -ENOMEM;
4309 res.fattr = nfs_alloc_fattr();
4310 if (res.fattr == NULL)
4313 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4314 if (IS_ERR(res.label)) {
4315 status = PTR_ERR(res.label);
4318 arg.bitmask = nfs4_bitmask(server, res.label);
4320 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4322 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4323 status = nfs_post_op_update_inode(inode, res.fattr);
4325 nfs_setsecurity(inode, res.fattr, res.label);
4329 nfs4_label_free(res.label);
4332 nfs_free_fattr(res.fattr);
4336 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4338 struct nfs4_exception exception = { };
4341 err = nfs4_handle_exception(NFS_SERVER(inode),
4342 _nfs4_proc_link(inode, dir, name),
4344 } while (exception.retry);
4348 struct nfs4_createdata {
4349 struct rpc_message msg;
4350 struct nfs4_create_arg arg;
4351 struct nfs4_create_res res;
4353 struct nfs_fattr fattr;
4354 struct nfs4_label *label;
4357 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4358 const struct qstr *name, struct iattr *sattr, u32 ftype)
4360 struct nfs4_createdata *data;
4362 data = kzalloc(sizeof(*data), GFP_KERNEL);
4364 struct nfs_server *server = NFS_SERVER(dir);
4366 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4367 if (IS_ERR(data->label))
4370 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4371 data->msg.rpc_argp = &data->arg;
4372 data->msg.rpc_resp = &data->res;
4373 data->arg.dir_fh = NFS_FH(dir);
4374 data->arg.server = server;
4375 data->arg.name = name;
4376 data->arg.attrs = sattr;
4377 data->arg.ftype = ftype;
4378 data->arg.bitmask = nfs4_bitmask(server, data->label);
4379 data->arg.umask = current_umask();
4380 data->res.server = server;
4381 data->res.fh = &data->fh;
4382 data->res.fattr = &data->fattr;
4383 data->res.label = data->label;
4384 nfs_fattr_init(data->res.fattr);
4392 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4394 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4395 &data->arg.seq_args, &data->res.seq_res, 1);
4397 update_changeattr(dir, &data->res.dir_cinfo,
4398 data->res.fattr->time_start);
4399 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4404 static void nfs4_free_createdata(struct nfs4_createdata *data)
4406 nfs4_label_free(data->label);
4410 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4411 struct page *page, unsigned int len, struct iattr *sattr,
4412 struct nfs4_label *label)
4414 struct nfs4_createdata *data;
4415 int status = -ENAMETOOLONG;
4417 if (len > NFS4_MAXPATHLEN)
4421 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4425 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4426 data->arg.u.symlink.pages = &page;
4427 data->arg.u.symlink.len = len;
4428 data->arg.label = label;
4430 status = nfs4_do_create(dir, dentry, data);
4432 nfs4_free_createdata(data);
4437 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4438 struct page *page, unsigned int len, struct iattr *sattr)
4440 struct nfs4_exception exception = { };
4441 struct nfs4_label l, *label = NULL;
4444 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4447 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4448 trace_nfs4_symlink(dir, &dentry->d_name, err);
4449 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4451 } while (exception.retry);
4453 nfs4_label_release_security(label);
4457 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4458 struct iattr *sattr, struct nfs4_label *label)
4460 struct nfs4_createdata *data;
4461 int status = -ENOMEM;
4463 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4467 data->arg.label = label;
4468 status = nfs4_do_create(dir, dentry, data);
4470 nfs4_free_createdata(data);
4475 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4476 struct iattr *sattr)
4478 struct nfs_server *server = NFS_SERVER(dir);
4479 struct nfs4_exception exception = { };
4480 struct nfs4_label l, *label = NULL;
4483 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4485 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4486 sattr->ia_mode &= ~current_umask();
4488 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4489 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4490 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4492 } while (exception.retry);
4493 nfs4_label_release_security(label);
4498 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4499 u64 cookie, struct page **pages, unsigned int count, bool plus)
4501 struct inode *dir = d_inode(dentry);
4502 struct nfs4_readdir_arg args = {
4507 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4510 struct nfs4_readdir_res res;
4511 struct rpc_message msg = {
4512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4519 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4521 (unsigned long long)cookie);
4522 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4523 res.pgbase = args.pgbase;
4524 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4526 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4527 status += args.pgbase;
4530 nfs_invalidate_atime(dir);
4532 dprintk("%s: returns %d\n", __func__, status);
4536 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4537 u64 cookie, struct page **pages, unsigned int count, bool plus)
4539 struct nfs4_exception exception = { };
4542 err = _nfs4_proc_readdir(dentry, cred, cookie,
4543 pages, count, plus);
4544 trace_nfs4_readdir(d_inode(dentry), err);
4545 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4547 } while (exception.retry);
4551 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4552 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4554 struct nfs4_createdata *data;
4555 int mode = sattr->ia_mode;
4556 int status = -ENOMEM;
4558 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4563 data->arg.ftype = NF4FIFO;
4564 else if (S_ISBLK(mode)) {
4565 data->arg.ftype = NF4BLK;
4566 data->arg.u.device.specdata1 = MAJOR(rdev);
4567 data->arg.u.device.specdata2 = MINOR(rdev);
4569 else if (S_ISCHR(mode)) {
4570 data->arg.ftype = NF4CHR;
4571 data->arg.u.device.specdata1 = MAJOR(rdev);
4572 data->arg.u.device.specdata2 = MINOR(rdev);
4573 } else if (!S_ISSOCK(mode)) {
4578 data->arg.label = label;
4579 status = nfs4_do_create(dir, dentry, data);
4581 nfs4_free_createdata(data);
4586 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4587 struct iattr *sattr, dev_t rdev)
4589 struct nfs_server *server = NFS_SERVER(dir);
4590 struct nfs4_exception exception = { };
4591 struct nfs4_label l, *label = NULL;
4594 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4596 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4597 sattr->ia_mode &= ~current_umask();
4599 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4600 trace_nfs4_mknod(dir, &dentry->d_name, err);
4601 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4603 } while (exception.retry);
4605 nfs4_label_release_security(label);
4610 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4611 struct nfs_fsstat *fsstat)
4613 struct nfs4_statfs_arg args = {
4615 .bitmask = server->attr_bitmask,
4617 struct nfs4_statfs_res res = {
4620 struct rpc_message msg = {
4621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4626 nfs_fattr_init(fsstat->fattr);
4627 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4630 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4632 struct nfs4_exception exception = { };
4635 err = nfs4_handle_exception(server,
4636 _nfs4_proc_statfs(server, fhandle, fsstat),
4638 } while (exception.retry);
4642 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4643 struct nfs_fsinfo *fsinfo)
4645 struct nfs4_fsinfo_arg args = {
4647 .bitmask = server->attr_bitmask,
4649 struct nfs4_fsinfo_res res = {
4652 struct rpc_message msg = {
4653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4658 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4661 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4663 struct nfs4_exception exception = { };
4664 unsigned long now = jiffies;
4668 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4669 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4671 nfs4_set_lease_period(server->nfs_client,
4672 fsinfo->lease_time * HZ,
4676 err = nfs4_handle_exception(server, err, &exception);
4677 } while (exception.retry);
4681 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4685 nfs_fattr_init(fsinfo->fattr);
4686 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4688 /* block layout checks this! */
4689 server->pnfs_blksize = fsinfo->blksize;
4690 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4696 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4697 struct nfs_pathconf *pathconf)
4699 struct nfs4_pathconf_arg args = {
4701 .bitmask = server->attr_bitmask,
4703 struct nfs4_pathconf_res res = {
4704 .pathconf = pathconf,
4706 struct rpc_message msg = {
4707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4712 /* None of the pathconf attributes are mandatory to implement */
4713 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4714 memset(pathconf, 0, sizeof(*pathconf));
4718 nfs_fattr_init(pathconf->fattr);
4719 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4722 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4723 struct nfs_pathconf *pathconf)
4725 struct nfs4_exception exception = { };
4729 err = nfs4_handle_exception(server,
4730 _nfs4_proc_pathconf(server, fhandle, pathconf),
4732 } while (exception.retry);
4736 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4737 const struct nfs_open_context *ctx,
4738 const struct nfs_lock_context *l_ctx,
4741 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4743 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4745 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4746 const struct nfs_open_context *ctx,
4747 const struct nfs_lock_context *l_ctx,
4750 nfs4_stateid current_stateid;
4752 /* If the current stateid represents a lost lock, then exit */
4753 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4755 return nfs4_stateid_match(stateid, ¤t_stateid);
4758 static bool nfs4_error_stateid_expired(int err)
4761 case -NFS4ERR_DELEG_REVOKED:
4762 case -NFS4ERR_ADMIN_REVOKED:
4763 case -NFS4ERR_BAD_STATEID:
4764 case -NFS4ERR_STALE_STATEID:
4765 case -NFS4ERR_OLD_STATEID:
4766 case -NFS4ERR_OPENMODE:
4767 case -NFS4ERR_EXPIRED:
4773 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4775 struct nfs_server *server = NFS_SERVER(hdr->inode);
4777 trace_nfs4_read(hdr, task->tk_status);
4778 if (task->tk_status < 0) {
4779 struct nfs4_exception exception = {
4780 .inode = hdr->inode,
4781 .state = hdr->args.context->state,
4782 .stateid = &hdr->args.stateid,
4784 task->tk_status = nfs4_async_handle_exception(task,
4785 server, task->tk_status, &exception);
4786 if (exception.retry) {
4787 rpc_restart_call_prepare(task);
4792 if (task->tk_status > 0)
4793 renew_lease(server, hdr->timestamp);
4797 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4798 struct nfs_pgio_args *args)
4801 if (!nfs4_error_stateid_expired(task->tk_status) ||
4802 nfs4_stateid_is_current(&args->stateid,
4807 rpc_restart_call_prepare(task);
4811 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4814 dprintk("--> %s\n", __func__);
4816 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4818 if (nfs4_read_stateid_changed(task, &hdr->args))
4820 if (task->tk_status > 0)
4821 nfs_invalidate_atime(hdr->inode);
4822 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4823 nfs4_read_done_cb(task, hdr);
4826 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4827 struct rpc_message *msg)
4829 hdr->timestamp = jiffies;
4830 if (!hdr->pgio_done_cb)
4831 hdr->pgio_done_cb = nfs4_read_done_cb;
4832 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4833 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4836 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4837 struct nfs_pgio_header *hdr)
4839 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
4840 &hdr->args.seq_args,
4844 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4845 hdr->args.lock_context,
4846 hdr->rw_mode) == -EIO)
4848 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4853 static int nfs4_write_done_cb(struct rpc_task *task,
4854 struct nfs_pgio_header *hdr)
4856 struct inode *inode = hdr->inode;
4858 trace_nfs4_write(hdr, task->tk_status);
4859 if (task->tk_status < 0) {
4860 struct nfs4_exception exception = {
4861 .inode = hdr->inode,
4862 .state = hdr->args.context->state,
4863 .stateid = &hdr->args.stateid,
4865 task->tk_status = nfs4_async_handle_exception(task,
4866 NFS_SERVER(inode), task->tk_status,
4868 if (exception.retry) {
4869 rpc_restart_call_prepare(task);
4873 if (task->tk_status >= 0) {
4874 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4875 nfs_writeback_update_inode(hdr);
4880 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4881 struct nfs_pgio_args *args)
4884 if (!nfs4_error_stateid_expired(task->tk_status) ||
4885 nfs4_stateid_is_current(&args->stateid,
4890 rpc_restart_call_prepare(task);
4894 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4896 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4898 if (nfs4_write_stateid_changed(task, &hdr->args))
4900 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4901 nfs4_write_done_cb(task, hdr);
4905 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4907 /* Don't request attributes for pNFS or O_DIRECT writes */
4908 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4910 /* Otherwise, request attributes if and only if we don't hold
4913 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4916 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4917 struct rpc_message *msg)
4919 struct nfs_server *server = NFS_SERVER(hdr->inode);
4921 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4922 hdr->args.bitmask = NULL;
4923 hdr->res.fattr = NULL;
4925 hdr->args.bitmask = server->cache_consistency_bitmask;
4927 if (!hdr->pgio_done_cb)
4928 hdr->pgio_done_cb = nfs4_write_done_cb;
4929 hdr->res.server = server;
4930 hdr->timestamp = jiffies;
4932 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4933 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4936 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4938 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
4939 &data->args.seq_args,
4944 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4946 struct inode *inode = data->inode;
4948 trace_nfs4_commit(data, task->tk_status);
4949 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4950 NULL, NULL) == -EAGAIN) {
4951 rpc_restart_call_prepare(task);
4957 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4959 if (!nfs4_sequence_done(task, &data->res.seq_res))
4961 return data->commit_done_cb(task, data);
4964 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4966 struct nfs_server *server = NFS_SERVER(data->inode);
4968 if (data->commit_done_cb == NULL)
4969 data->commit_done_cb = nfs4_commit_done_cb;
4970 data->res.server = server;
4971 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4972 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4975 struct nfs4_renewdata {
4976 struct nfs_client *client;
4977 unsigned long timestamp;
4981 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4982 * standalone procedure for queueing an asynchronous RENEW.
4984 static void nfs4_renew_release(void *calldata)
4986 struct nfs4_renewdata *data = calldata;
4987 struct nfs_client *clp = data->client;
4989 if (refcount_read(&clp->cl_count) > 1)
4990 nfs4_schedule_state_renewal(clp);
4991 nfs_put_client(clp);
4995 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4997 struct nfs4_renewdata *data = calldata;
4998 struct nfs_client *clp = data->client;
4999 unsigned long timestamp = data->timestamp;
5001 trace_nfs4_renew_async(clp, task->tk_status);
5002 switch (task->tk_status) {
5005 case -NFS4ERR_LEASE_MOVED:
5006 nfs4_schedule_lease_moved_recovery(clp);
5009 /* Unless we're shutting down, schedule state recovery! */
5010 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5012 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
5013 nfs4_schedule_lease_recovery(clp);
5016 nfs4_schedule_path_down_recovery(clp);
5018 do_renew_lease(clp, timestamp);
5021 static const struct rpc_call_ops nfs4_renew_ops = {
5022 .rpc_call_done = nfs4_renew_done,
5023 .rpc_release = nfs4_renew_release,
5026 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5028 struct rpc_message msg = {
5029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5033 struct nfs4_renewdata *data;
5035 if (renew_flags == 0)
5037 if (!refcount_inc_not_zero(&clp->cl_count))
5039 data = kmalloc(sizeof(*data), GFP_NOFS);
5041 nfs_put_client(clp);
5045 data->timestamp = jiffies;
5046 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
5047 &nfs4_renew_ops, data);
5050 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
5052 struct rpc_message msg = {
5053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5057 unsigned long now = jiffies;
5060 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5063 do_renew_lease(clp, now);
5067 static inline int nfs4_server_supports_acls(struct nfs_server *server)
5069 return server->caps & NFS_CAP_ACLS;
5072 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5073 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
5076 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
5078 static int buf_to_pages_noslab(const void *buf, size_t buflen,
5079 struct page **pages)
5081 struct page *newpage, **spages;
5087 len = min_t(size_t, PAGE_SIZE, buflen);
5088 newpage = alloc_page(GFP_KERNEL);
5090 if (newpage == NULL)
5092 memcpy(page_address(newpage), buf, len);
5097 } while (buflen != 0);
5103 __free_page(spages[rc-1]);
5107 struct nfs4_cached_acl {
5113 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5115 struct nfs_inode *nfsi = NFS_I(inode);
5117 spin_lock(&inode->i_lock);
5118 kfree(nfsi->nfs4_acl);
5119 nfsi->nfs4_acl = acl;
5120 spin_unlock(&inode->i_lock);
5123 static void nfs4_zap_acl_attr(struct inode *inode)
5125 nfs4_set_cached_acl(inode, NULL);
5128 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5130 struct nfs_inode *nfsi = NFS_I(inode);
5131 struct nfs4_cached_acl *acl;
5134 spin_lock(&inode->i_lock);
5135 acl = nfsi->nfs4_acl;
5138 if (buf == NULL) /* user is just asking for length */
5140 if (acl->cached == 0)
5142 ret = -ERANGE; /* see getxattr(2) man page */
5143 if (acl->len > buflen)
5145 memcpy(buf, acl->data, acl->len);
5149 spin_unlock(&inode->i_lock);
5153 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
5155 struct nfs4_cached_acl *acl;
5156 size_t buflen = sizeof(*acl) + acl_len;
5158 if (buflen <= PAGE_SIZE) {
5159 acl = kmalloc(buflen, GFP_KERNEL);
5163 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5165 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5172 nfs4_set_cached_acl(inode, acl);
5176 * The getxattr API returns the required buffer length when called with a
5177 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5178 * the required buf. On a NULL buf, we send a page of data to the server
5179 * guessing that the ACL request can be serviced by a page. If so, we cache
5180 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5181 * the cache. If not so, we throw away the page, and cache the required
5182 * length. The next getxattr call will then produce another round trip to
5183 * the server, this time with the input buf of the required size.
5185 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5187 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
5188 struct nfs_getaclargs args = {
5189 .fh = NFS_FH(inode),
5193 struct nfs_getaclres res = {
5196 struct rpc_message msg = {
5197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5201 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5202 int ret = -ENOMEM, i;
5204 if (npages > ARRAY_SIZE(pages))
5207 for (i = 0; i < npages; i++) {
5208 pages[i] = alloc_page(GFP_KERNEL);
5213 /* for decoding across pages */
5214 res.acl_scratch = alloc_page(GFP_KERNEL);
5215 if (!res.acl_scratch)
5218 args.acl_len = npages * PAGE_SIZE;
5220 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5221 __func__, buf, buflen, npages, args.acl_len);
5222 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5223 &msg, &args.seq_args, &res.seq_res, 0);
5227 /* Handle the case where the passed-in buffer is too short */
5228 if (res.acl_flags & NFS4_ACL_TRUNC) {
5229 /* Did the user only issue a request for the acl length? */
5235 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5237 if (res.acl_len > buflen) {
5241 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5246 for (i = 0; i < npages; i++)
5248 __free_page(pages[i]);
5249 if (res.acl_scratch)
5250 __free_page(res.acl_scratch);
5254 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5256 struct nfs4_exception exception = { };
5259 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5260 trace_nfs4_get_acl(inode, ret);
5263 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5264 } while (exception.retry);
5268 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5270 struct nfs_server *server = NFS_SERVER(inode);
5273 if (!nfs4_server_supports_acls(server))
5275 ret = nfs_revalidate_inode(server, inode);
5278 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5279 nfs_zap_acl_cache(inode);
5280 ret = nfs4_read_cached_acl(inode, buf, buflen);
5282 /* -ENOENT is returned if there is no ACL or if there is an ACL
5283 * but no cached acl data, just the acl length */
5285 return nfs4_get_acl_uncached(inode, buf, buflen);
5288 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5290 struct nfs_server *server = NFS_SERVER(inode);
5291 struct page *pages[NFS4ACL_MAXPAGES];
5292 struct nfs_setaclargs arg = {
5293 .fh = NFS_FH(inode),
5297 struct nfs_setaclres res;
5298 struct rpc_message msg = {
5299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5303 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5306 if (!nfs4_server_supports_acls(server))
5308 if (npages > ARRAY_SIZE(pages))
5310 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5313 nfs4_inode_return_delegation(inode);
5314 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5317 * Free each page after tx, so the only ref left is
5318 * held by the network stack
5321 put_page(pages[i-1]);
5324 * Acl update can result in inode attribute update.
5325 * so mark the attribute cache invalid.
5327 spin_lock(&inode->i_lock);
5328 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5329 spin_unlock(&inode->i_lock);
5330 nfs_access_zap_cache(inode);
5331 nfs_zap_acl_cache(inode);
5335 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5337 struct nfs4_exception exception = { };
5340 err = __nfs4_proc_set_acl(inode, buf, buflen);
5341 trace_nfs4_set_acl(inode, err);
5342 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5344 } while (exception.retry);
5348 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5349 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5352 struct nfs_server *server = NFS_SERVER(inode);
5353 struct nfs_fattr fattr;
5354 struct nfs4_label label = {0, 0, buflen, buf};
5356 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5357 struct nfs4_getattr_arg arg = {
5358 .fh = NFS_FH(inode),
5361 struct nfs4_getattr_res res = {
5366 struct rpc_message msg = {
5367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5373 nfs_fattr_init(&fattr);
5375 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5378 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5380 if (buflen < label.len)
5385 static int nfs4_get_security_label(struct inode *inode, void *buf,
5388 struct nfs4_exception exception = { };
5391 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5395 err = _nfs4_get_security_label(inode, buf, buflen);
5396 trace_nfs4_get_security_label(inode, err);
5397 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5399 } while (exception.retry);
5403 static int _nfs4_do_set_security_label(struct inode *inode,
5404 struct nfs4_label *ilabel,
5405 struct nfs_fattr *fattr,
5406 struct nfs4_label *olabel)
5409 struct iattr sattr = {0};
5410 struct nfs_server *server = NFS_SERVER(inode);
5411 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5412 struct nfs_setattrargs arg = {
5413 .fh = NFS_FH(inode),
5419 struct nfs_setattrres res = {
5424 struct rpc_message msg = {
5425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5431 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5433 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5435 dprintk("%s failed: %d\n", __func__, status);
5440 static int nfs4_do_set_security_label(struct inode *inode,
5441 struct nfs4_label *ilabel,
5442 struct nfs_fattr *fattr,
5443 struct nfs4_label *olabel)
5445 struct nfs4_exception exception = { };
5449 err = _nfs4_do_set_security_label(inode, ilabel,
5451 trace_nfs4_set_security_label(inode, err);
5452 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5454 } while (exception.retry);
5459 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5461 struct nfs4_label ilabel, *olabel = NULL;
5462 struct nfs_fattr fattr;
5463 struct rpc_cred *cred;
5466 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5469 nfs_fattr_init(&fattr);
5473 ilabel.label = (char *)buf;
5474 ilabel.len = buflen;
5476 cred = rpc_lookup_cred();
5478 return PTR_ERR(cred);
5480 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5481 if (IS_ERR(olabel)) {
5482 status = -PTR_ERR(olabel);
5486 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5488 nfs_setsecurity(inode, &fattr, olabel);
5490 nfs4_label_free(olabel);
5495 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5498 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5499 nfs4_verifier *bootverf)
5503 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5504 /* An impossible timestamp guarantees this value
5505 * will never match a generated boot time. */
5506 verf[0] = cpu_to_be32(U32_MAX);
5507 verf[1] = cpu_to_be32(U32_MAX);
5509 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5510 u64 ns = ktime_to_ns(nn->boot_time);
5512 verf[0] = cpu_to_be32(ns >> 32);
5513 verf[1] = cpu_to_be32(ns);
5515 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5519 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5524 if (clp->cl_owner_id != NULL)
5528 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5529 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5531 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5535 if (len > NFS4_OPAQUE_LIMIT + 1)
5539 * Since this string is allocated at mount time, and held until the
5540 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5541 * about a memory-reclaim deadlock.
5543 str = kmalloc(len, GFP_KERNEL);
5548 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5550 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5551 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5554 clp->cl_owner_id = str;
5559 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5564 len = 10 + 10 + 1 + 10 + 1 +
5565 strlen(nfs4_client_id_uniquifier) + 1 +
5566 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5568 if (len > NFS4_OPAQUE_LIMIT + 1)
5572 * Since this string is allocated at mount time, and held until the
5573 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5574 * about a memory-reclaim deadlock.
5576 str = kmalloc(len, GFP_KERNEL);
5580 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5581 clp->rpc_ops->version, clp->cl_minorversion,
5582 nfs4_client_id_uniquifier,
5583 clp->cl_rpcclient->cl_nodename);
5584 clp->cl_owner_id = str;
5589 nfs4_init_uniform_client_string(struct nfs_client *clp)
5594 if (clp->cl_owner_id != NULL)
5597 if (nfs4_client_id_uniquifier[0] != '\0')
5598 return nfs4_init_uniquifier_client_string(clp);
5600 len = 10 + 10 + 1 + 10 + 1 +
5601 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5603 if (len > NFS4_OPAQUE_LIMIT + 1)
5607 * Since this string is allocated at mount time, and held until the
5608 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5609 * about a memory-reclaim deadlock.
5611 str = kmalloc(len, GFP_KERNEL);
5615 scnprintf(str, len, "Linux NFSv%u.%u %s",
5616 clp->rpc_ops->version, clp->cl_minorversion,
5617 clp->cl_rpcclient->cl_nodename);
5618 clp->cl_owner_id = str;
5623 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5624 * services. Advertise one based on the address family of the
5628 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5630 if (strchr(clp->cl_ipaddr, ':') != NULL)
5631 return scnprintf(buf, len, "tcp6");
5633 return scnprintf(buf, len, "tcp");
5636 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5638 struct nfs4_setclientid *sc = calldata;
5640 if (task->tk_status == 0)
5641 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5644 static const struct rpc_call_ops nfs4_setclientid_ops = {
5645 .rpc_call_done = nfs4_setclientid_done,
5649 * nfs4_proc_setclientid - Negotiate client ID
5650 * @clp: state data structure
5651 * @program: RPC program for NFSv4 callback service
5652 * @port: IP port number for NFS4 callback service
5653 * @cred: RPC credential to use for this call
5654 * @res: where to place the result
5656 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5658 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5659 unsigned short port, struct rpc_cred *cred,
5660 struct nfs4_setclientid_res *res)
5662 nfs4_verifier sc_verifier;
5663 struct nfs4_setclientid setclientid = {
5664 .sc_verifier = &sc_verifier,
5668 struct rpc_message msg = {
5669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5670 .rpc_argp = &setclientid,
5674 struct rpc_task *task;
5675 struct rpc_task_setup task_setup_data = {
5676 .rpc_client = clp->cl_rpcclient,
5677 .rpc_message = &msg,
5678 .callback_ops = &nfs4_setclientid_ops,
5679 .callback_data = &setclientid,
5680 .flags = RPC_TASK_TIMEOUT,
5684 /* nfs_client_id4 */
5685 nfs4_init_boot_verifier(clp, &sc_verifier);
5687 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5688 status = nfs4_init_uniform_client_string(clp);
5690 status = nfs4_init_nonuniform_client_string(clp);
5696 setclientid.sc_netid_len =
5697 nfs4_init_callback_netid(clp,
5698 setclientid.sc_netid,
5699 sizeof(setclientid.sc_netid));
5700 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5701 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5702 clp->cl_ipaddr, port >> 8, port & 255);
5704 dprintk("NFS call setclientid auth=%s, '%s'\n",
5705 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5707 task = rpc_run_task(&task_setup_data);
5709 status = PTR_ERR(task);
5712 status = task->tk_status;
5713 if (setclientid.sc_cred) {
5714 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5715 put_rpccred(setclientid.sc_cred);
5719 trace_nfs4_setclientid(clp, status);
5720 dprintk("NFS reply setclientid: %d\n", status);
5725 * nfs4_proc_setclientid_confirm - Confirm client ID
5726 * @clp: state data structure
5727 * @res: result of a previous SETCLIENTID
5728 * @cred: RPC credential to use for this call
5730 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5732 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5733 struct nfs4_setclientid_res *arg,
5734 struct rpc_cred *cred)
5736 struct rpc_message msg = {
5737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5743 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5744 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5746 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5747 trace_nfs4_setclientid_confirm(clp, status);
5748 dprintk("NFS reply setclientid_confirm: %d\n", status);
5752 struct nfs4_delegreturndata {
5753 struct nfs4_delegreturnargs args;
5754 struct nfs4_delegreturnres res;
5756 nfs4_stateid stateid;
5757 unsigned long timestamp;
5759 struct nfs4_layoutreturn_args arg;
5760 struct nfs4_layoutreturn_res res;
5761 struct nfs4_xdr_opaque_data ld_private;
5765 struct nfs_fattr fattr;
5767 struct inode *inode;
5770 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5772 struct nfs4_delegreturndata *data = calldata;
5773 struct nfs4_exception exception = {
5774 .inode = data->inode,
5775 .stateid = &data->stateid,
5778 if (!nfs4_sequence_done(task, &data->res.seq_res))
5781 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5783 /* Handle Layoutreturn errors */
5784 if (data->args.lr_args && task->tk_status != 0) {
5785 switch(data->res.lr_ret) {
5787 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5790 data->args.lr_args = NULL;
5791 data->res.lr_res = NULL;
5793 case -NFS4ERR_OLD_STATEID:
5794 if (nfs4_refresh_layout_stateid(&data->args.lr_args->stateid,
5798 case -NFS4ERR_ADMIN_REVOKED:
5799 case -NFS4ERR_DELEG_REVOKED:
5800 case -NFS4ERR_EXPIRED:
5801 case -NFS4ERR_BAD_STATEID:
5802 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5803 case -NFS4ERR_WRONG_CRED:
5804 data->args.lr_args = NULL;
5805 data->res.lr_res = NULL;
5810 switch (task->tk_status) {
5812 renew_lease(data->res.server, data->timestamp);
5814 case -NFS4ERR_ADMIN_REVOKED:
5815 case -NFS4ERR_DELEG_REVOKED:
5816 case -NFS4ERR_EXPIRED:
5817 nfs4_free_revoked_stateid(data->res.server,
5819 task->tk_msg.rpc_cred);
5821 case -NFS4ERR_BAD_STATEID:
5822 case -NFS4ERR_STALE_STATEID:
5823 task->tk_status = 0;
5825 case -NFS4ERR_OLD_STATEID:
5826 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
5828 task->tk_status = 0;
5830 case -NFS4ERR_ACCESS:
5831 if (data->args.bitmask) {
5832 data->args.bitmask = NULL;
5833 data->res.fattr = NULL;
5838 task->tk_status = nfs4_async_handle_exception(task,
5839 data->res.server, task->tk_status,
5841 if (exception.retry)
5844 data->rpc_status = task->tk_status;
5847 data->res.lr_ret = 0;
5849 task->tk_status = 0;
5850 rpc_restart_call_prepare(task);
5853 static void nfs4_delegreturn_release(void *calldata)
5855 struct nfs4_delegreturndata *data = calldata;
5856 struct inode *inode = data->inode;
5860 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5862 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5863 nfs_iput_and_deactive(inode);
5868 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5870 struct nfs4_delegreturndata *d_data;
5872 d_data = (struct nfs4_delegreturndata *)data;
5874 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5877 nfs4_setup_sequence(d_data->res.server->nfs_client,
5878 &d_data->args.seq_args,
5879 &d_data->res.seq_res,
5883 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5884 .rpc_call_prepare = nfs4_delegreturn_prepare,
5885 .rpc_call_done = nfs4_delegreturn_done,
5886 .rpc_release = nfs4_delegreturn_release,
5889 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5891 struct nfs4_delegreturndata *data;
5892 struct nfs_server *server = NFS_SERVER(inode);
5893 struct rpc_task *task;
5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = server->client,
5900 .rpc_message = &msg,
5901 .callback_ops = &nfs4_delegreturn_ops,
5902 .flags = RPC_TASK_ASYNC,
5906 data = kzalloc(sizeof(*data), GFP_NOFS);
5909 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5911 nfs4_state_protect(server->nfs_client,
5912 NFS_SP4_MACH_CRED_CLEANUP,
5913 &task_setup_data.rpc_client, &msg);
5915 data->args.fhandle = &data->fh;
5916 data->args.stateid = &data->stateid;
5917 data->args.bitmask = server->cache_consistency_bitmask;
5918 nfs_copy_fh(&data->fh, NFS_FH(inode));
5919 nfs4_stateid_copy(&data->stateid, stateid);
5920 data->res.fattr = &data->fattr;
5921 data->res.server = server;
5922 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5923 data->lr.arg.ld_private = &data->lr.ld_private;
5924 nfs_fattr_init(data->res.fattr);
5925 data->timestamp = jiffies;
5926 data->rpc_status = 0;
5927 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5928 data->inode = nfs_igrab_and_active(inode);
5931 data->args.lr_args = &data->lr.arg;
5932 data->res.lr_res = &data->lr.res;
5934 } else if (data->lr.roc) {
5935 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5936 data->lr.roc = false;
5939 task_setup_data.callback_data = data;
5940 msg.rpc_argp = &data->args;
5941 msg.rpc_resp = &data->res;
5942 task = rpc_run_task(&task_setup_data);
5944 return PTR_ERR(task);
5947 status = rpc_wait_for_completion_task(task);
5950 status = data->rpc_status;
5956 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5958 struct nfs_server *server = NFS_SERVER(inode);
5959 struct nfs4_exception exception = { };
5962 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5963 trace_nfs4_delegreturn(inode, stateid, err);
5965 case -NFS4ERR_STALE_STATEID:
5966 case -NFS4ERR_EXPIRED:
5970 err = nfs4_handle_exception(server, err, &exception);
5971 } while (exception.retry);
5975 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5977 struct inode *inode = state->inode;
5978 struct nfs_server *server = NFS_SERVER(inode);
5979 struct nfs_client *clp = server->nfs_client;
5980 struct nfs_lockt_args arg = {
5981 .fh = NFS_FH(inode),
5984 struct nfs_lockt_res res = {
5987 struct rpc_message msg = {
5988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5991 .rpc_cred = state->owner->so_cred,
5993 struct nfs4_lock_state *lsp;
5996 arg.lock_owner.clientid = clp->cl_clientid;
5997 status = nfs4_set_lock_state(state, request);
6000 lsp = request->fl_u.nfs4_fl.owner;
6001 arg.lock_owner.id = lsp->ls_seqid.owner_id;
6002 arg.lock_owner.s_dev = server->s_dev;
6003 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6006 request->fl_type = F_UNLCK;
6008 case -NFS4ERR_DENIED:
6011 request->fl_ops->fl_release_private(request);
6012 request->fl_ops = NULL;
6017 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6019 struct nfs4_exception exception = { };
6023 err = _nfs4_proc_getlk(state, cmd, request);
6024 trace_nfs4_get_lock(request, state, cmd, err);
6025 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
6027 } while (exception.retry);
6031 struct nfs4_unlockdata {
6032 struct nfs_locku_args arg;
6033 struct nfs_locku_res res;
6034 struct nfs4_lock_state *lsp;
6035 struct nfs_open_context *ctx;
6036 struct nfs_lock_context *l_ctx;
6037 struct file_lock fl;
6038 struct nfs_server *server;
6039 unsigned long timestamp;
6042 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6043 struct nfs_open_context *ctx,
6044 struct nfs4_lock_state *lsp,
6045 struct nfs_seqid *seqid)
6047 struct nfs4_unlockdata *p;
6048 struct inode *inode = lsp->ls_state->inode;
6050 p = kzalloc(sizeof(*p), GFP_NOFS);
6053 p->arg.fh = NFS_FH(inode);
6055 p->arg.seqid = seqid;
6056 p->res.seqid = seqid;
6058 refcount_inc(&lsp->ls_count);
6059 /* Ensure we don't close file until we're done freeing locks! */
6060 p->ctx = get_nfs_open_context(ctx);
6061 p->l_ctx = nfs_get_lock_context(ctx);
6062 memcpy(&p->fl, fl, sizeof(p->fl));
6063 p->server = NFS_SERVER(inode);
6067 static void nfs4_locku_release_calldata(void *data)
6069 struct nfs4_unlockdata *calldata = data;
6070 nfs_free_seqid(calldata->arg.seqid);
6071 nfs4_put_lock_state(calldata->lsp);
6072 nfs_put_lock_context(calldata->l_ctx);
6073 put_nfs_open_context(calldata->ctx);
6077 static void nfs4_locku_done(struct rpc_task *task, void *data)
6079 struct nfs4_unlockdata *calldata = data;
6080 struct nfs4_exception exception = {
6081 .inode = calldata->lsp->ls_state->inode,
6082 .stateid = &calldata->arg.stateid,
6085 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6087 switch (task->tk_status) {
6089 renew_lease(calldata->server, calldata->timestamp);
6090 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
6091 if (nfs4_update_lock_stateid(calldata->lsp,
6092 &calldata->res.stateid))
6094 case -NFS4ERR_ADMIN_REVOKED:
6095 case -NFS4ERR_EXPIRED:
6096 nfs4_free_revoked_stateid(calldata->server,
6097 &calldata->arg.stateid,
6098 task->tk_msg.rpc_cred);
6099 case -NFS4ERR_BAD_STATEID:
6100 case -NFS4ERR_OLD_STATEID:
6101 case -NFS4ERR_STALE_STATEID:
6102 if (!nfs4_stateid_match(&calldata->arg.stateid,
6103 &calldata->lsp->ls_stateid))
6104 rpc_restart_call_prepare(task);
6107 task->tk_status = nfs4_async_handle_exception(task,
6108 calldata->server, task->tk_status,
6110 if (exception.retry)
6111 rpc_restart_call_prepare(task);
6113 nfs_release_seqid(calldata->arg.seqid);
6116 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
6118 struct nfs4_unlockdata *calldata = data;
6120 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6121 nfs_async_iocounter_wait(task, calldata->l_ctx))
6124 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
6126 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
6127 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
6128 /* Note: exit _without_ running nfs4_locku_done */
6131 calldata->timestamp = jiffies;
6132 if (nfs4_setup_sequence(calldata->server->nfs_client,
6133 &calldata->arg.seq_args,
6134 &calldata->res.seq_res,
6136 nfs_release_seqid(calldata->arg.seqid);
6139 task->tk_action = NULL;
6141 nfs4_sequence_done(task, &calldata->res.seq_res);
6144 static const struct rpc_call_ops nfs4_locku_ops = {
6145 .rpc_call_prepare = nfs4_locku_prepare,
6146 .rpc_call_done = nfs4_locku_done,
6147 .rpc_release = nfs4_locku_release_calldata,
6150 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6151 struct nfs_open_context *ctx,
6152 struct nfs4_lock_state *lsp,
6153 struct nfs_seqid *seqid)
6155 struct nfs4_unlockdata *data;
6156 struct rpc_message msg = {
6157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6158 .rpc_cred = ctx->cred,
6160 struct rpc_task_setup task_setup_data = {
6161 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
6162 .rpc_message = &msg,
6163 .callback_ops = &nfs4_locku_ops,
6164 .workqueue = nfsiod_workqueue,
6165 .flags = RPC_TASK_ASYNC,
6168 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6169 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6171 /* Ensure this is an unlock - when canceling a lock, the
6172 * canceled lock is passed in, and it won't be an unlock.
6174 fl->fl_type = F_UNLCK;
6175 if (fl->fl_flags & FL_CLOSE)
6176 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
6178 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6180 nfs_free_seqid(seqid);
6181 return ERR_PTR(-ENOMEM);
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 return rpc_run_task(&task_setup_data);
6191 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6193 struct inode *inode = state->inode;
6194 struct nfs4_state_owner *sp = state->owner;
6195 struct nfs_inode *nfsi = NFS_I(inode);
6196 struct nfs_seqid *seqid;
6197 struct nfs4_lock_state *lsp;
6198 struct rpc_task *task;
6199 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6201 unsigned char fl_flags = request->fl_flags;
6203 status = nfs4_set_lock_state(state, request);
6204 /* Unlock _before_ we do the RPC call */
6205 request->fl_flags |= FL_EXISTS;
6206 /* Exclude nfs_delegation_claim_locks() */
6207 mutex_lock(&sp->so_delegreturn_mutex);
6208 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
6209 down_read(&nfsi->rwsem);
6210 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6211 up_read(&nfsi->rwsem);
6212 mutex_unlock(&sp->so_delegreturn_mutex);
6215 up_read(&nfsi->rwsem);
6216 mutex_unlock(&sp->so_delegreturn_mutex);
6219 /* Is this a delegated lock? */
6220 lsp = request->fl_u.nfs4_fl.owner;
6221 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6223 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6224 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6228 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6229 status = PTR_ERR(task);
6232 status = rpc_wait_for_completion_task(task);
6235 request->fl_flags = fl_flags;
6236 trace_nfs4_unlock(request, state, F_SETLK, status);
6240 struct nfs4_lockdata {
6241 struct nfs_lock_args arg;
6242 struct nfs_lock_res res;
6243 struct nfs4_lock_state *lsp;
6244 struct nfs_open_context *ctx;
6245 struct file_lock fl;
6246 unsigned long timestamp;
6249 struct nfs_server *server;
6252 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6253 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6256 struct nfs4_lockdata *p;
6257 struct inode *inode = lsp->ls_state->inode;
6258 struct nfs_server *server = NFS_SERVER(inode);
6259 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6261 p = kzalloc(sizeof(*p), gfp_mask);
6265 p->arg.fh = NFS_FH(inode);
6267 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6268 if (IS_ERR(p->arg.open_seqid))
6270 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6271 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6272 if (IS_ERR(p->arg.lock_seqid))
6273 goto out_free_seqid;
6274 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6275 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6276 p->arg.lock_owner.s_dev = server->s_dev;
6277 p->res.lock_seqid = p->arg.lock_seqid;
6280 refcount_inc(&lsp->ls_count);
6281 p->ctx = get_nfs_open_context(ctx);
6282 memcpy(&p->fl, fl, sizeof(p->fl));
6285 nfs_free_seqid(p->arg.open_seqid);
6291 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6293 struct nfs4_lockdata *data = calldata;
6294 struct nfs4_state *state = data->lsp->ls_state;
6296 dprintk("%s: begin!\n", __func__);
6297 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6299 /* Do we need to do an open_to_lock_owner? */
6300 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6301 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6302 goto out_release_lock_seqid;
6304 nfs4_stateid_copy(&data->arg.open_stateid,
6305 &state->open_stateid);
6306 data->arg.new_lock_owner = 1;
6307 data->res.open_seqid = data->arg.open_seqid;
6309 data->arg.new_lock_owner = 0;
6310 nfs4_stateid_copy(&data->arg.lock_stateid,
6311 &data->lsp->ls_stateid);
6313 if (!nfs4_valid_open_stateid(state)) {
6314 data->rpc_status = -EBADF;
6315 task->tk_action = NULL;
6316 goto out_release_open_seqid;
6318 data->timestamp = jiffies;
6319 if (nfs4_setup_sequence(data->server->nfs_client,
6320 &data->arg.seq_args,
6324 out_release_open_seqid:
6325 nfs_release_seqid(data->arg.open_seqid);
6326 out_release_lock_seqid:
6327 nfs_release_seqid(data->arg.lock_seqid);
6329 nfs4_sequence_done(task, &data->res.seq_res);
6330 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6333 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6335 struct nfs4_lockdata *data = calldata;
6336 struct nfs4_lock_state *lsp = data->lsp;
6338 dprintk("%s: begin!\n", __func__);
6340 if (!nfs4_sequence_done(task, &data->res.seq_res))
6343 data->rpc_status = task->tk_status;
6344 switch (task->tk_status) {
6346 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6348 if (data->arg.new_lock) {
6349 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6350 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6351 rpc_restart_call_prepare(task);
6355 if (data->arg.new_lock_owner != 0) {
6356 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6357 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6358 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6359 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6360 rpc_restart_call_prepare(task);
6362 case -NFS4ERR_BAD_STATEID:
6363 case -NFS4ERR_OLD_STATEID:
6364 case -NFS4ERR_STALE_STATEID:
6365 case -NFS4ERR_EXPIRED:
6366 if (data->arg.new_lock_owner != 0) {
6367 if (!nfs4_stateid_match(&data->arg.open_stateid,
6368 &lsp->ls_state->open_stateid))
6369 rpc_restart_call_prepare(task);
6370 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6372 rpc_restart_call_prepare(task);
6374 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6377 static void nfs4_lock_release(void *calldata)
6379 struct nfs4_lockdata *data = calldata;
6381 dprintk("%s: begin!\n", __func__);
6382 nfs_free_seqid(data->arg.open_seqid);
6383 if (data->cancelled) {
6384 struct rpc_task *task;
6385 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6386 data->arg.lock_seqid);
6388 rpc_put_task_async(task);
6389 dprintk("%s: cancelling lock!\n", __func__);
6391 nfs_free_seqid(data->arg.lock_seqid);
6392 nfs4_put_lock_state(data->lsp);
6393 put_nfs_open_context(data->ctx);
6395 dprintk("%s: done!\n", __func__);
6398 static const struct rpc_call_ops nfs4_lock_ops = {
6399 .rpc_call_prepare = nfs4_lock_prepare,
6400 .rpc_call_done = nfs4_lock_done,
6401 .rpc_release = nfs4_lock_release,
6404 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6407 case -NFS4ERR_ADMIN_REVOKED:
6408 case -NFS4ERR_EXPIRED:
6409 case -NFS4ERR_BAD_STATEID:
6410 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6411 if (new_lock_owner != 0 ||
6412 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6413 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6415 case -NFS4ERR_STALE_STATEID:
6416 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6417 nfs4_schedule_lease_recovery(server->nfs_client);
6421 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6423 struct nfs4_lockdata *data;
6424 struct rpc_task *task;
6425 struct rpc_message msg = {
6426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6427 .rpc_cred = state->owner->so_cred,
6429 struct rpc_task_setup task_setup_data = {
6430 .rpc_client = NFS_CLIENT(state->inode),
6431 .rpc_message = &msg,
6432 .callback_ops = &nfs4_lock_ops,
6433 .workqueue = nfsiod_workqueue,
6434 .flags = RPC_TASK_ASYNC,
6438 dprintk("%s: begin!\n", __func__);
6439 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6440 fl->fl_u.nfs4_fl.owner,
6441 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6445 data->arg.block = 1;
6446 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6447 msg.rpc_argp = &data->arg;
6448 msg.rpc_resp = &data->res;
6449 task_setup_data.callback_data = data;
6450 if (recovery_type > NFS_LOCK_NEW) {
6451 if (recovery_type == NFS_LOCK_RECLAIM)
6452 data->arg.reclaim = NFS_LOCK_RECLAIM;
6453 nfs4_set_sequence_privileged(&data->arg.seq_args);
6455 data->arg.new_lock = 1;
6456 task = rpc_run_task(&task_setup_data);
6458 return PTR_ERR(task);
6459 ret = rpc_wait_for_completion_task(task);
6461 ret = data->rpc_status;
6463 nfs4_handle_setlk_error(data->server, data->lsp,
6464 data->arg.new_lock_owner, ret);
6466 data->cancelled = true;
6468 dprintk("%s: done, ret = %d!\n", __func__, ret);
6469 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6473 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6475 struct nfs_server *server = NFS_SERVER(state->inode);
6476 struct nfs4_exception exception = {
6477 .inode = state->inode,
6482 /* Cache the lock if possible... */
6483 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6485 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6486 if (err != -NFS4ERR_DELAY)
6488 nfs4_handle_exception(server, err, &exception);
6489 } while (exception.retry);
6493 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6495 struct nfs_server *server = NFS_SERVER(state->inode);
6496 struct nfs4_exception exception = {
6497 .inode = state->inode,
6501 err = nfs4_set_lock_state(state, request);
6504 if (!recover_lost_locks) {
6505 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6509 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6511 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6515 case -NFS4ERR_GRACE:
6516 case -NFS4ERR_DELAY:
6517 nfs4_handle_exception(server, err, &exception);
6520 } while (exception.retry);
6525 #if defined(CONFIG_NFS_V4_1)
6526 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6528 struct nfs4_lock_state *lsp;
6531 status = nfs4_set_lock_state(state, request);
6534 lsp = request->fl_u.nfs4_fl.owner;
6535 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6536 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6538 return nfs4_lock_expired(state, request);
6542 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6544 struct nfs_inode *nfsi = NFS_I(state->inode);
6545 struct nfs4_state_owner *sp = state->owner;
6546 unsigned char fl_flags = request->fl_flags;
6549 request->fl_flags |= FL_ACCESS;
6550 status = locks_lock_inode_wait(state->inode, request);
6553 mutex_lock(&sp->so_delegreturn_mutex);
6554 down_read(&nfsi->rwsem);
6555 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6556 /* Yes: cache locks! */
6557 /* ...but avoid races with delegation recall... */
6558 request->fl_flags = fl_flags & ~FL_SLEEP;
6559 status = locks_lock_inode_wait(state->inode, request);
6560 up_read(&nfsi->rwsem);
6561 mutex_unlock(&sp->so_delegreturn_mutex);
6564 up_read(&nfsi->rwsem);
6565 mutex_unlock(&sp->so_delegreturn_mutex);
6566 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6568 request->fl_flags = fl_flags;
6572 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6574 struct nfs4_exception exception = {
6576 .inode = state->inode,
6581 err = _nfs4_proc_setlk(state, cmd, request);
6582 if (err == -NFS4ERR_DENIED)
6584 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6586 } while (exception.retry);
6590 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6591 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6594 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6595 struct file_lock *request)
6597 int status = -ERESTARTSYS;
6598 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6600 while(!signalled()) {
6601 status = nfs4_proc_setlk(state, cmd, request);
6602 if ((status != -EAGAIN) || IS_SETLK(cmd))
6604 freezable_schedule_timeout_interruptible(timeout);
6606 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6607 status = -ERESTARTSYS;
6612 #ifdef CONFIG_NFS_V4_1
6613 struct nfs4_lock_waiter {
6614 struct task_struct *task;
6615 struct inode *inode;
6616 struct nfs_lowner *owner;
6621 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
6624 struct nfs4_lock_waiter *waiter = wait->private;
6626 /* NULL key means to wake up everyone */
6628 struct cb_notify_lock_args *cbnl = key;
6629 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6630 *wowner = waiter->owner;
6632 /* Only wake if the callback was for the same owner. */
6633 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
6636 /* Make sure it's for the right inode */
6637 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6640 waiter->notified = true;
6643 /* override "private" so we can use default_wake_function */
6644 wait->private = waiter->task;
6645 ret = autoremove_wake_function(wait, mode, flags, key);
6646 wait->private = waiter;
6651 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6653 int status = -ERESTARTSYS;
6654 unsigned long flags;
6655 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6656 struct nfs_server *server = NFS_SERVER(state->inode);
6657 struct nfs_client *clp = server->nfs_client;
6658 wait_queue_head_t *q = &clp->cl_lock_waitq;
6659 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6660 .id = lsp->ls_seqid.owner_id,
6661 .s_dev = server->s_dev };
6662 struct nfs4_lock_waiter waiter = { .task = current,
6663 .inode = state->inode,
6665 .notified = false };
6666 wait_queue_entry_t wait;
6668 /* Don't bother with waitqueue if we don't expect a callback */
6669 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6670 return nfs4_retry_setlk_simple(state, cmd, request);
6673 wait.private = &waiter;
6674 wait.func = nfs4_wake_lock_waiter;
6675 add_wait_queue(q, &wait);
6677 while(!signalled()) {
6678 waiter.notified = false;
6679 status = nfs4_proc_setlk(state, cmd, request);
6680 if ((status != -EAGAIN) || IS_SETLK(cmd))
6683 status = -ERESTARTSYS;
6684 spin_lock_irqsave(&q->lock, flags);
6685 if (waiter.notified) {
6686 spin_unlock_irqrestore(&q->lock, flags);
6689 set_current_state(TASK_INTERRUPTIBLE);
6690 spin_unlock_irqrestore(&q->lock, flags);
6692 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
6695 finish_wait(q, &wait);
6698 #else /* !CONFIG_NFS_V4_1 */
6700 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6702 return nfs4_retry_setlk_simple(state, cmd, request);
6707 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6709 struct nfs_open_context *ctx;
6710 struct nfs4_state *state;
6713 /* verify open state */
6714 ctx = nfs_file_open_context(filp);
6717 if (IS_GETLK(cmd)) {
6719 return nfs4_proc_getlk(state, F_GETLK, request);
6723 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6726 if (request->fl_type == F_UNLCK) {
6728 return nfs4_proc_unlck(state, cmd, request);
6735 if ((request->fl_flags & FL_POSIX) &&
6736 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6740 * Don't rely on the VFS having checked the file open mode,
6741 * since it won't do this for flock() locks.
6743 switch (request->fl_type) {
6745 if (!(filp->f_mode & FMODE_READ))
6749 if (!(filp->f_mode & FMODE_WRITE))
6753 status = nfs4_set_lock_state(state, request);
6757 return nfs4_retry_setlk(state, cmd, request);
6760 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6762 struct nfs_server *server = NFS_SERVER(state->inode);
6765 err = nfs4_set_lock_state(state, fl);
6768 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6769 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
6772 struct nfs_release_lockowner_data {
6773 struct nfs4_lock_state *lsp;
6774 struct nfs_server *server;
6775 struct nfs_release_lockowner_args args;
6776 struct nfs_release_lockowner_res res;
6777 unsigned long timestamp;
6780 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6782 struct nfs_release_lockowner_data *data = calldata;
6783 struct nfs_server *server = data->server;
6784 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6785 &data->res.seq_res, task);
6786 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6787 data->timestamp = jiffies;
6790 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6792 struct nfs_release_lockowner_data *data = calldata;
6793 struct nfs_server *server = data->server;
6795 nfs40_sequence_done(task, &data->res.seq_res);
6797 switch (task->tk_status) {
6799 renew_lease(server, data->timestamp);
6801 case -NFS4ERR_STALE_CLIENTID:
6802 case -NFS4ERR_EXPIRED:
6803 nfs4_schedule_lease_recovery(server->nfs_client);
6805 case -NFS4ERR_LEASE_MOVED:
6806 case -NFS4ERR_DELAY:
6807 if (nfs4_async_handle_error(task, server,
6808 NULL, NULL) == -EAGAIN)
6809 rpc_restart_call_prepare(task);
6813 static void nfs4_release_lockowner_release(void *calldata)
6815 struct nfs_release_lockowner_data *data = calldata;
6816 nfs4_free_lock_state(data->server, data->lsp);
6820 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6821 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6822 .rpc_call_done = nfs4_release_lockowner_done,
6823 .rpc_release = nfs4_release_lockowner_release,
6827 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6829 struct nfs_release_lockowner_data *data;
6830 struct rpc_message msg = {
6831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6834 if (server->nfs_client->cl_mvops->minor_version != 0)
6837 data = kmalloc(sizeof(*data), GFP_NOFS);
6841 data->server = server;
6842 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6843 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6844 data->args.lock_owner.s_dev = server->s_dev;
6846 msg.rpc_argp = &data->args;
6847 msg.rpc_resp = &data->res;
6848 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6849 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6852 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6854 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6855 struct dentry *unused, struct inode *inode,
6856 const char *key, const void *buf,
6857 size_t buflen, int flags)
6859 return nfs4_proc_set_acl(inode, buf, buflen);
6862 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6863 struct dentry *unused, struct inode *inode,
6864 const char *key, void *buf, size_t buflen)
6866 return nfs4_proc_get_acl(inode, buf, buflen);
6869 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6871 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6874 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6876 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6877 struct dentry *unused, struct inode *inode,
6878 const char *key, const void *buf,
6879 size_t buflen, int flags)
6881 if (security_ismaclabel(key))
6882 return nfs4_set_security_label(inode, buf, buflen);
6887 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6888 struct dentry *unused, struct inode *inode,
6889 const char *key, void *buf, size_t buflen)
6891 if (security_ismaclabel(key))
6892 return nfs4_get_security_label(inode, buf, buflen);
6897 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6901 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6902 len = security_inode_listsecurity(inode, list, list_len);
6903 if (list_len && len > list_len)
6909 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6910 .prefix = XATTR_SECURITY_PREFIX,
6911 .get = nfs4_xattr_get_nfs4_label,
6912 .set = nfs4_xattr_set_nfs4_label,
6918 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6926 * nfs_fhget will use either the mounted_on_fileid or the fileid
6928 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6930 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6931 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6932 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6933 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6936 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6937 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6938 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6942 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6943 const struct qstr *name,
6944 struct nfs4_fs_locations *fs_locations,
6947 struct nfs_server *server = NFS_SERVER(dir);
6949 struct nfs4_fs_locations_arg args = {
6950 .dir_fh = NFS_FH(dir),
6955 struct nfs4_fs_locations_res res = {
6956 .fs_locations = fs_locations,
6958 struct rpc_message msg = {
6959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6965 dprintk("%s: start\n", __func__);
6967 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
6968 bitmask[1] = nfs4_fattr_bitmap[1];
6970 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6971 * is not supported */
6972 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6973 bitmask[0] &= ~FATTR4_WORD0_FILEID;
6975 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
6977 nfs_fattr_init(&fs_locations->fattr);
6978 fs_locations->server = server;
6979 fs_locations->nlocations = 0;
6980 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6981 dprintk("%s: returned status = %d\n", __func__, status);
6985 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6986 const struct qstr *name,
6987 struct nfs4_fs_locations *fs_locations,
6990 struct nfs4_exception exception = { };
6993 err = _nfs4_proc_fs_locations(client, dir, name,
6994 fs_locations, page);
6995 trace_nfs4_get_fs_locations(dir, name, err);
6996 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6998 } while (exception.retry);
7003 * This operation also signals the server that this client is
7004 * performing migration recovery. The server can stop returning
7005 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7006 * appended to this compound to identify the client ID which is
7007 * performing recovery.
7009 static int _nfs40_proc_get_locations(struct inode *inode,
7010 struct nfs4_fs_locations *locations,
7011 struct page *page, struct rpc_cred *cred)
7013 struct nfs_server *server = NFS_SERVER(inode);
7014 struct rpc_clnt *clnt = server->client;
7016 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7018 struct nfs4_fs_locations_arg args = {
7019 .clientid = server->nfs_client->cl_clientid,
7020 .fh = NFS_FH(inode),
7023 .migration = 1, /* skip LOOKUP */
7024 .renew = 1, /* append RENEW */
7026 struct nfs4_fs_locations_res res = {
7027 .fs_locations = locations,
7031 struct rpc_message msg = {
7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7037 unsigned long now = jiffies;
7040 nfs_fattr_init(&locations->fattr);
7041 locations->server = server;
7042 locations->nlocations = 0;
7044 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7045 nfs4_set_sequence_privileged(&args.seq_args);
7046 status = nfs4_call_sync_sequence(clnt, server, &msg,
7047 &args.seq_args, &res.seq_res);
7051 renew_lease(server, now);
7055 #ifdef CONFIG_NFS_V4_1
7058 * This operation also signals the server that this client is
7059 * performing migration recovery. The server can stop asserting
7060 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7061 * performing this operation is identified in the SEQUENCE
7062 * operation in this compound.
7064 * When the client supports GETATTR(fs_locations_info), it can
7065 * be plumbed in here.
7067 static int _nfs41_proc_get_locations(struct inode *inode,
7068 struct nfs4_fs_locations *locations,
7069 struct page *page, struct rpc_cred *cred)
7071 struct nfs_server *server = NFS_SERVER(inode);
7072 struct rpc_clnt *clnt = server->client;
7074 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7076 struct nfs4_fs_locations_arg args = {
7077 .fh = NFS_FH(inode),
7080 .migration = 1, /* skip LOOKUP */
7082 struct nfs4_fs_locations_res res = {
7083 .fs_locations = locations,
7086 struct rpc_message msg = {
7087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7094 nfs_fattr_init(&locations->fattr);
7095 locations->server = server;
7096 locations->nlocations = 0;
7098 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7099 nfs4_set_sequence_privileged(&args.seq_args);
7100 status = nfs4_call_sync_sequence(clnt, server, &msg,
7101 &args.seq_args, &res.seq_res);
7102 if (status == NFS4_OK &&
7103 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7104 status = -NFS4ERR_LEASE_MOVED;
7108 #endif /* CONFIG_NFS_V4_1 */
7111 * nfs4_proc_get_locations - discover locations for a migrated FSID
7112 * @inode: inode on FSID that is migrating
7113 * @locations: result of query
7115 * @cred: credential to use for this operation
7117 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7118 * operation failed, or a negative errno if a local error occurred.
7120 * On success, "locations" is filled in, but if the server has
7121 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7124 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
7125 * from this client that require migration recovery.
7127 int nfs4_proc_get_locations(struct inode *inode,
7128 struct nfs4_fs_locations *locations,
7129 struct page *page, struct rpc_cred *cred)
7131 struct nfs_server *server = NFS_SERVER(inode);
7132 struct nfs_client *clp = server->nfs_client;
7133 const struct nfs4_mig_recovery_ops *ops =
7134 clp->cl_mvops->mig_recovery_ops;
7135 struct nfs4_exception exception = { };
7138 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7139 (unsigned long long)server->fsid.major,
7140 (unsigned long long)server->fsid.minor,
7142 nfs_display_fhandle(NFS_FH(inode), __func__);
7145 status = ops->get_locations(inode, locations, page, cred);
7146 if (status != -NFS4ERR_DELAY)
7148 nfs4_handle_exception(server, status, &exception);
7149 } while (exception.retry);
7154 * This operation also signals the server that this client is
7155 * performing "lease moved" recovery. The server can stop
7156 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7157 * is appended to this compound to identify the client ID which is
7158 * performing recovery.
7160 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7162 struct nfs_server *server = NFS_SERVER(inode);
7163 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7164 struct rpc_clnt *clnt = server->client;
7165 struct nfs4_fsid_present_arg args = {
7166 .fh = NFS_FH(inode),
7167 .clientid = clp->cl_clientid,
7168 .renew = 1, /* append RENEW */
7170 struct nfs4_fsid_present_res res = {
7173 struct rpc_message msg = {
7174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7179 unsigned long now = jiffies;
7182 res.fh = nfs_alloc_fhandle();
7186 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7187 nfs4_set_sequence_privileged(&args.seq_args);
7188 status = nfs4_call_sync_sequence(clnt, server, &msg,
7189 &args.seq_args, &res.seq_res);
7190 nfs_free_fhandle(res.fh);
7194 do_renew_lease(clp, now);
7198 #ifdef CONFIG_NFS_V4_1
7201 * This operation also signals the server that this client is
7202 * performing "lease moved" recovery. The server can stop asserting
7203 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7204 * this operation is identified in the SEQUENCE operation in this
7207 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7209 struct nfs_server *server = NFS_SERVER(inode);
7210 struct rpc_clnt *clnt = server->client;
7211 struct nfs4_fsid_present_arg args = {
7212 .fh = NFS_FH(inode),
7214 struct nfs4_fsid_present_res res = {
7216 struct rpc_message msg = {
7217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7224 res.fh = nfs_alloc_fhandle();
7228 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7229 nfs4_set_sequence_privileged(&args.seq_args);
7230 status = nfs4_call_sync_sequence(clnt, server, &msg,
7231 &args.seq_args, &res.seq_res);
7232 nfs_free_fhandle(res.fh);
7233 if (status == NFS4_OK &&
7234 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7235 status = -NFS4ERR_LEASE_MOVED;
7239 #endif /* CONFIG_NFS_V4_1 */
7242 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7243 * @inode: inode on FSID to check
7244 * @cred: credential to use for this operation
7246 * Server indicates whether the FSID is present, moved, or not
7247 * recognized. This operation is necessary to clear a LEASE_MOVED
7248 * condition for this client ID.
7250 * Returns NFS4_OK if the FSID is present on this server,
7251 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7252 * NFS4ERR code if some error occurred on the server, or a
7253 * negative errno if a local failure occurred.
7255 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7257 struct nfs_server *server = NFS_SERVER(inode);
7258 struct nfs_client *clp = server->nfs_client;
7259 const struct nfs4_mig_recovery_ops *ops =
7260 clp->cl_mvops->mig_recovery_ops;
7261 struct nfs4_exception exception = { };
7264 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7265 (unsigned long long)server->fsid.major,
7266 (unsigned long long)server->fsid.minor,
7268 nfs_display_fhandle(NFS_FH(inode), __func__);
7271 status = ops->fsid_present(inode, cred);
7272 if (status != -NFS4ERR_DELAY)
7274 nfs4_handle_exception(server, status, &exception);
7275 } while (exception.retry);
7280 * If 'use_integrity' is true and the state managment nfs_client
7281 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7282 * and the machine credential as per RFC3530bis and RFC5661 Security
7283 * Considerations sections. Otherwise, just use the user cred with the
7284 * filesystem's rpc_client.
7286 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7289 struct nfs4_secinfo_arg args = {
7290 .dir_fh = NFS_FH(dir),
7293 struct nfs4_secinfo_res res = {
7296 struct rpc_message msg = {
7297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7301 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7302 struct rpc_cred *cred = NULL;
7304 if (use_integrity) {
7305 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7306 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7307 msg.rpc_cred = cred;
7310 dprintk("NFS call secinfo %s\n", name->name);
7312 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7313 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7315 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7317 dprintk("NFS reply secinfo: %d\n", status);
7325 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7326 struct nfs4_secinfo_flavors *flavors)
7328 struct nfs4_exception exception = { };
7331 err = -NFS4ERR_WRONGSEC;
7333 /* try to use integrity protection with machine cred */
7334 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7335 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7338 * if unable to use integrity protection, or SECINFO with
7339 * integrity protection returns NFS4ERR_WRONGSEC (which is
7340 * disallowed by spec, but exists in deployed servers) use
7341 * the current filesystem's rpc_client and the user cred.
7343 if (err == -NFS4ERR_WRONGSEC)
7344 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7346 trace_nfs4_secinfo(dir, name, err);
7347 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7349 } while (exception.retry);
7353 #ifdef CONFIG_NFS_V4_1
7355 * Check the exchange flags returned by the server for invalid flags, having
7356 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7359 static int nfs4_check_cl_exchange_flags(u32 flags)
7361 if (flags & ~EXCHGID4_FLAG_MASK_R)
7363 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7364 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7366 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7370 return -NFS4ERR_INVAL;
7374 nfs41_same_server_scope(struct nfs41_server_scope *a,
7375 struct nfs41_server_scope *b)
7377 if (a->server_scope_sz != b->server_scope_sz)
7379 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7383 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7387 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7388 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7392 * nfs4_proc_bind_one_conn_to_session()
7394 * The 4.1 client currently uses the same TCP connection for the
7395 * fore and backchannel.
7398 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7399 struct rpc_xprt *xprt,
7400 struct nfs_client *clp,
7401 struct rpc_cred *cred)
7404 struct nfs41_bind_conn_to_session_args args = {
7406 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7408 struct nfs41_bind_conn_to_session_res res;
7409 struct rpc_message msg = {
7411 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7416 struct rpc_task_setup task_setup_data = {
7419 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7420 .rpc_message = &msg,
7421 .flags = RPC_TASK_TIMEOUT,
7423 struct rpc_task *task;
7425 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7426 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7427 args.dir = NFS4_CDFC4_FORE;
7429 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7430 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7431 args.dir = NFS4_CDFC4_FORE;
7433 task = rpc_run_task(&task_setup_data);
7434 if (!IS_ERR(task)) {
7435 status = task->tk_status;
7438 status = PTR_ERR(task);
7439 trace_nfs4_bind_conn_to_session(clp, status);
7441 if (memcmp(res.sessionid.data,
7442 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7443 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7446 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7447 dprintk("NFS: %s: Unexpected direction from server\n",
7451 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7452 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7461 struct rpc_bind_conn_calldata {
7462 struct nfs_client *clp;
7463 struct rpc_cred *cred;
7467 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7468 struct rpc_xprt *xprt,
7471 struct rpc_bind_conn_calldata *p = calldata;
7473 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7476 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7478 struct rpc_bind_conn_calldata data = {
7482 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7483 nfs4_proc_bind_conn_to_session_callback, &data);
7487 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7488 * and operations we'd like to see to enable certain features in the allow map
7490 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7491 .how = SP4_MACH_CRED,
7492 .enforce.u.words = {
7493 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7494 1 << (OP_EXCHANGE_ID - 32) |
7495 1 << (OP_CREATE_SESSION - 32) |
7496 1 << (OP_DESTROY_SESSION - 32) |
7497 1 << (OP_DESTROY_CLIENTID - 32)
7500 [0] = 1 << (OP_CLOSE) |
7501 1 << (OP_OPEN_DOWNGRADE) |
7503 1 << (OP_DELEGRETURN) |
7505 [1] = 1 << (OP_SECINFO - 32) |
7506 1 << (OP_SECINFO_NO_NAME - 32) |
7507 1 << (OP_LAYOUTRETURN - 32) |
7508 1 << (OP_TEST_STATEID - 32) |
7509 1 << (OP_FREE_STATEID - 32) |
7510 1 << (OP_WRITE - 32)
7515 * Select the state protection mode for client `clp' given the server results
7516 * from exchange_id in `sp'.
7518 * Returns 0 on success, negative errno otherwise.
7520 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7521 struct nfs41_state_protection *sp)
7523 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7524 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7525 1 << (OP_EXCHANGE_ID - 32) |
7526 1 << (OP_CREATE_SESSION - 32) |
7527 1 << (OP_DESTROY_SESSION - 32) |
7528 1 << (OP_DESTROY_CLIENTID - 32)
7530 unsigned long flags = 0;
7534 if (sp->how == SP4_MACH_CRED) {
7535 /* Print state protect result */
7536 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7537 for (i = 0; i <= LAST_NFS4_OP; i++) {
7538 if (test_bit(i, sp->enforce.u.longs))
7539 dfprintk(MOUNT, " enforce op %d\n", i);
7540 if (test_bit(i, sp->allow.u.longs))
7541 dfprintk(MOUNT, " allow op %d\n", i);
7544 /* make sure nothing is on enforce list that isn't supported */
7545 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7546 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7547 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7554 * Minimal mode - state operations are allowed to use machine
7555 * credential. Note this already happens by default, so the
7556 * client doesn't have to do anything more than the negotiation.
7558 * NOTE: we don't care if EXCHANGE_ID is in the list -
7559 * we're already using the machine cred for exchange_id
7560 * and will never use a different cred.
7562 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7563 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7564 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7565 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7566 dfprintk(MOUNT, "sp4_mach_cred:\n");
7567 dfprintk(MOUNT, " minimal mode enabled\n");
7568 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
7570 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7575 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7576 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7577 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7578 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7579 dfprintk(MOUNT, " cleanup mode enabled\n");
7580 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
7583 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7584 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7585 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
7588 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7589 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7590 dfprintk(MOUNT, " secinfo mode enabled\n");
7591 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
7594 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7595 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7596 dfprintk(MOUNT, " stateid mode enabled\n");
7597 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
7600 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7601 dfprintk(MOUNT, " write mode enabled\n");
7602 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
7605 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7606 dfprintk(MOUNT, " commit mode enabled\n");
7607 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
7611 clp->cl_sp4_flags = flags;
7615 struct nfs41_exchange_id_data {
7616 struct nfs41_exchange_id_res res;
7617 struct nfs41_exchange_id_args args;
7620 static void nfs4_exchange_id_release(void *data)
7622 struct nfs41_exchange_id_data *cdata =
7623 (struct nfs41_exchange_id_data *)data;
7625 nfs_put_client(cdata->args.client);
7626 kfree(cdata->res.impl_id);
7627 kfree(cdata->res.server_scope);
7628 kfree(cdata->res.server_owner);
7632 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7633 .rpc_release = nfs4_exchange_id_release,
7637 * _nfs4_proc_exchange_id()
7639 * Wrapper for EXCHANGE_ID operation.
7641 static struct rpc_task *
7642 nfs4_run_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7643 u32 sp4_how, struct rpc_xprt *xprt)
7645 struct rpc_message msg = {
7646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7649 struct rpc_task_setup task_setup_data = {
7650 .rpc_client = clp->cl_rpcclient,
7651 .callback_ops = &nfs4_exchange_id_call_ops,
7652 .rpc_message = &msg,
7653 .flags = RPC_TASK_TIMEOUT,
7655 struct nfs41_exchange_id_data *calldata;
7658 if (!refcount_inc_not_zero(&clp->cl_count))
7659 return ERR_PTR(-EIO);
7662 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7666 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
7668 status = nfs4_init_uniform_client_string(clp);
7672 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7675 if (unlikely(calldata->res.server_owner == NULL))
7678 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7680 if (unlikely(calldata->res.server_scope == NULL))
7681 goto out_server_owner;
7683 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7684 if (unlikely(calldata->res.impl_id == NULL))
7685 goto out_server_scope;
7689 calldata->args.state_protect.how = SP4_NONE;
7693 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7703 task_setup_data.rpc_xprt = xprt;
7704 task_setup_data.flags |= RPC_TASK_SOFTCONN;
7705 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
7706 sizeof(calldata->args.verifier.data));
7708 calldata->args.client = clp;
7709 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7710 EXCHGID4_FLAG_BIND_PRINC_STATEID;
7711 #ifdef CONFIG_NFS_V4_1_MIGRATION
7712 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
7714 msg.rpc_argp = &calldata->args;
7715 msg.rpc_resp = &calldata->res;
7716 task_setup_data.callback_data = calldata;
7718 return rpc_run_task(&task_setup_data);
7721 kfree(calldata->res.impl_id);
7723 kfree(calldata->res.server_scope);
7725 kfree(calldata->res.server_owner);
7729 nfs_put_client(clp);
7730 return ERR_PTR(status);
7734 * _nfs4_proc_exchange_id()
7736 * Wrapper for EXCHANGE_ID operation.
7738 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7741 struct rpc_task *task;
7742 struct nfs41_exchange_id_args *argp;
7743 struct nfs41_exchange_id_res *resp;
7746 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
7748 return PTR_ERR(task);
7750 argp = task->tk_msg.rpc_argp;
7751 resp = task->tk_msg.rpc_resp;
7752 status = task->tk_status;
7756 status = nfs4_check_cl_exchange_flags(resp->flags);
7760 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
7764 clp->cl_clientid = resp->clientid;
7765 clp->cl_exchange_flags = resp->flags;
7766 clp->cl_seqid = resp->seqid;
7767 /* Client ID is not confirmed */
7768 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
7769 clear_bit(NFS4_SESSION_ESTABLISHED,
7770 &clp->cl_session->session_state);
7772 if (clp->cl_serverscope != NULL &&
7773 !nfs41_same_server_scope(clp->cl_serverscope,
7774 resp->server_scope)) {
7775 dprintk("%s: server_scope mismatch detected\n",
7777 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7780 swap(clp->cl_serverowner, resp->server_owner);
7781 swap(clp->cl_serverscope, resp->server_scope);
7782 swap(clp->cl_implid, resp->impl_id);
7784 /* Save the EXCHANGE_ID verifier session trunk tests */
7785 memcpy(clp->cl_confirm.data, argp->verifier.data,
7786 sizeof(clp->cl_confirm.data));
7788 trace_nfs4_exchange_id(clp, status);
7794 * nfs4_proc_exchange_id()
7796 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7798 * Since the clientid has expired, all compounds using sessions
7799 * associated with the stale clientid will be returning
7800 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7801 * be in some phase of session reset.
7803 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7805 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7807 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7810 /* try SP4_MACH_CRED if krb5i/p */
7811 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7812 authflavor == RPC_AUTH_GSS_KRB5P) {
7813 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7819 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7823 * nfs4_test_session_trunk
7825 * This is an add_xprt_test() test function called from
7826 * rpc_clnt_setup_test_and_add_xprt.
7828 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7829 * and is dereferrenced in nfs4_exchange_id_release
7831 * Upon success, add the new transport to the rpc_clnt
7833 * @clnt: struct rpc_clnt to get new transport
7834 * @xprt: the rpc_xprt to test
7835 * @data: call data for _nfs4_proc_exchange_id.
7837 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7840 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7841 struct rpc_task *task;
7846 dprintk("--> %s try %s\n", __func__,
7847 xprt->address_strings[RPC_DISPLAY_ADDR]);
7849 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7851 /* Test connection for session trunking. Async exchange_id call */
7852 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7854 return PTR_ERR(task);
7856 status = task->tk_status;
7858 status = nfs4_detect_session_trunking(adata->clp,
7859 task->tk_msg.rpc_resp, xprt);
7864 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7866 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7867 struct rpc_cred *cred)
7869 struct rpc_message msg = {
7870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7876 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7877 trace_nfs4_destroy_clientid(clp, status);
7879 dprintk("NFS: Got error %d from the server %s on "
7880 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7884 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7885 struct rpc_cred *cred)
7890 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7891 ret = _nfs4_proc_destroy_clientid(clp, cred);
7893 case -NFS4ERR_DELAY:
7894 case -NFS4ERR_CLIENTID_BUSY:
7904 int nfs4_destroy_clientid(struct nfs_client *clp)
7906 struct rpc_cred *cred;
7909 if (clp->cl_mvops->minor_version < 1)
7911 if (clp->cl_exchange_flags == 0)
7913 if (clp->cl_preserve_clid)
7915 cred = nfs4_get_clid_cred(clp);
7916 ret = nfs4_proc_destroy_clientid(clp, cred);
7921 case -NFS4ERR_STALE_CLIENTID:
7922 clp->cl_exchange_flags = 0;
7928 struct nfs4_get_lease_time_data {
7929 struct nfs4_get_lease_time_args *args;
7930 struct nfs4_get_lease_time_res *res;
7931 struct nfs_client *clp;
7934 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7937 struct nfs4_get_lease_time_data *data =
7938 (struct nfs4_get_lease_time_data *)calldata;
7940 dprintk("--> %s\n", __func__);
7941 /* just setup sequence, do not trigger session recovery
7942 since we're invoked within one */
7943 nfs4_setup_sequence(data->clp,
7944 &data->args->la_seq_args,
7945 &data->res->lr_seq_res,
7947 dprintk("<-- %s\n", __func__);
7951 * Called from nfs4_state_manager thread for session setup, so don't recover
7952 * from sequence operation or clientid errors.
7954 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7956 struct nfs4_get_lease_time_data *data =
7957 (struct nfs4_get_lease_time_data *)calldata;
7959 dprintk("--> %s\n", __func__);
7960 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7962 switch (task->tk_status) {
7963 case -NFS4ERR_DELAY:
7964 case -NFS4ERR_GRACE:
7965 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7966 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7967 task->tk_status = 0;
7969 case -NFS4ERR_RETRY_UNCACHED_REP:
7970 rpc_restart_call_prepare(task);
7973 dprintk("<-- %s\n", __func__);
7976 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7977 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7978 .rpc_call_done = nfs4_get_lease_time_done,
7981 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7983 struct rpc_task *task;
7984 struct nfs4_get_lease_time_args args;
7985 struct nfs4_get_lease_time_res res = {
7986 .lr_fsinfo = fsinfo,
7988 struct nfs4_get_lease_time_data data = {
7993 struct rpc_message msg = {
7994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7998 struct rpc_task_setup task_setup = {
7999 .rpc_client = clp->cl_rpcclient,
8000 .rpc_message = &msg,
8001 .callback_ops = &nfs4_get_lease_time_ops,
8002 .callback_data = &data,
8003 .flags = RPC_TASK_TIMEOUT,
8007 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8008 nfs4_set_sequence_privileged(&args.la_seq_args);
8009 task = rpc_run_task(&task_setup);
8012 return PTR_ERR(task);
8014 status = task->tk_status;
8020 * Initialize the values to be used by the client in CREATE_SESSION
8021 * If nfs4_init_session set the fore channel request and response sizes,
8024 * Set the back channel max_resp_sz_cached to zero to force the client to
8025 * always set csa_cachethis to FALSE because the current implementation
8026 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8028 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8029 struct rpc_clnt *clnt)
8031 unsigned int max_rqst_sz, max_resp_sz;
8032 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
8034 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8035 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
8037 /* Fore channel attributes */
8038 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8039 args->fc_attrs.max_resp_sz = max_resp_sz;
8040 args->fc_attrs.max_ops = NFS4_MAX_OPS;
8041 args->fc_attrs.max_reqs = max_session_slots;
8043 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8044 "max_ops=%u max_reqs=%u\n",
8046 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8047 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
8049 /* Back channel attributes */
8050 args->bc_attrs.max_rqst_sz = max_bc_payload;
8051 args->bc_attrs.max_resp_sz = max_bc_payload;
8052 args->bc_attrs.max_resp_sz_cached = 0;
8053 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
8054 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
8056 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8057 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8059 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8060 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8061 args->bc_attrs.max_reqs);
8064 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8065 struct nfs41_create_session_res *res)
8067 struct nfs4_channel_attrs *sent = &args->fc_attrs;
8068 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
8070 if (rcvd->max_resp_sz > sent->max_resp_sz)
8073 * Our requested max_ops is the minimum we need; we're not
8074 * prepared to break up compounds into smaller pieces than that.
8075 * So, no point even trying to continue if the server won't
8078 if (rcvd->max_ops < sent->max_ops)
8080 if (rcvd->max_reqs == 0)
8082 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8083 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
8087 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8088 struct nfs41_create_session_res *res)
8090 struct nfs4_channel_attrs *sent = &args->bc_attrs;
8091 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8093 if (!(res->flags & SESSION4_BACK_CHAN))
8095 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8097 if (rcvd->max_resp_sz < sent->max_resp_sz)
8099 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8101 if (rcvd->max_ops > sent->max_ops)
8103 if (rcvd->max_reqs > sent->max_reqs)
8109 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
8110 struct nfs41_create_session_res *res)
8114 ret = nfs4_verify_fore_channel_attrs(args, res);
8117 return nfs4_verify_back_channel_attrs(args, res);
8120 static void nfs4_update_session(struct nfs4_session *session,
8121 struct nfs41_create_session_res *res)
8123 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
8124 /* Mark client id and session as being confirmed */
8125 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8126 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
8127 session->flags = res->flags;
8128 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
8129 if (res->flags & SESSION4_BACK_CHAN)
8130 memcpy(&session->bc_attrs, &res->bc_attrs,
8131 sizeof(session->bc_attrs));
8134 static int _nfs4_proc_create_session(struct nfs_client *clp,
8135 struct rpc_cred *cred)
8137 struct nfs4_session *session = clp->cl_session;
8138 struct nfs41_create_session_args args = {
8140 .clientid = clp->cl_clientid,
8141 .seqid = clp->cl_seqid,
8142 .cb_program = NFS4_CALLBACK,
8144 struct nfs41_create_session_res res;
8146 struct rpc_message msg = {
8147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8154 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
8155 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
8157 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8158 trace_nfs4_create_session(clp, status);
8161 case -NFS4ERR_STALE_CLIENTID:
8162 case -NFS4ERR_DELAY:
8171 /* Verify the session's negotiated channel_attrs values */
8172 status = nfs4_verify_channel_attrs(&args, &res);
8173 /* Increment the clientid slot sequence id */
8176 nfs4_update_session(session, &res);
8183 * Issues a CREATE_SESSION operation to the server.
8184 * It is the responsibility of the caller to verify the session is
8185 * expired before calling this routine.
8187 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
8191 struct nfs4_session *session = clp->cl_session;
8193 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8195 status = _nfs4_proc_create_session(clp, cred);
8199 /* Init or reset the session slot tables */
8200 status = nfs4_setup_session_slot_tables(session);
8201 dprintk("slot table setup returned %d\n", status);
8205 ptr = (unsigned *)&session->sess_id.data[0];
8206 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8207 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
8209 dprintk("<-- %s\n", __func__);
8214 * Issue the over-the-wire RPC DESTROY_SESSION.
8215 * The caller must serialize access to this routine.
8217 int nfs4_proc_destroy_session(struct nfs4_session *session,
8218 struct rpc_cred *cred)
8220 struct rpc_message msg = {
8221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8222 .rpc_argp = session,
8227 dprintk("--> nfs4_proc_destroy_session\n");
8229 /* session is still being setup */
8230 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8233 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8234 trace_nfs4_destroy_session(session->clp, status);
8237 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8238 "Session has been destroyed regardless...\n", status);
8240 dprintk("<-- nfs4_proc_destroy_session\n");
8245 * Renew the cl_session lease.
8247 struct nfs4_sequence_data {
8248 struct nfs_client *clp;
8249 struct nfs4_sequence_args args;
8250 struct nfs4_sequence_res res;
8253 static void nfs41_sequence_release(void *data)
8255 struct nfs4_sequence_data *calldata = data;
8256 struct nfs_client *clp = calldata->clp;
8258 if (refcount_read(&clp->cl_count) > 1)
8259 nfs4_schedule_state_renewal(clp);
8260 nfs_put_client(clp);
8264 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8266 switch(task->tk_status) {
8267 case -NFS4ERR_DELAY:
8268 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8271 nfs4_schedule_lease_recovery(clp);
8276 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8278 struct nfs4_sequence_data *calldata = data;
8279 struct nfs_client *clp = calldata->clp;
8281 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8284 trace_nfs4_sequence(clp, task->tk_status);
8285 if (task->tk_status < 0) {
8286 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8287 if (refcount_read(&clp->cl_count) == 1)
8290 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8291 rpc_restart_call_prepare(task);
8295 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8297 dprintk("<-- %s\n", __func__);
8300 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8302 struct nfs4_sequence_data *calldata = data;
8303 struct nfs_client *clp = calldata->clp;
8304 struct nfs4_sequence_args *args;
8305 struct nfs4_sequence_res *res;
8307 args = task->tk_msg.rpc_argp;
8308 res = task->tk_msg.rpc_resp;
8310 nfs4_setup_sequence(clp, args, res, task);
8313 static const struct rpc_call_ops nfs41_sequence_ops = {
8314 .rpc_call_done = nfs41_sequence_call_done,
8315 .rpc_call_prepare = nfs41_sequence_prepare,
8316 .rpc_release = nfs41_sequence_release,
8319 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8320 struct rpc_cred *cred,
8321 struct nfs4_slot *slot,
8324 struct nfs4_sequence_data *calldata;
8325 struct rpc_message msg = {
8326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8329 struct rpc_task_setup task_setup_data = {
8330 .rpc_client = clp->cl_rpcclient,
8331 .rpc_message = &msg,
8332 .callback_ops = &nfs41_sequence_ops,
8333 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8335 struct rpc_task *ret;
8337 ret = ERR_PTR(-EIO);
8338 if (!refcount_inc_not_zero(&clp->cl_count))
8341 ret = ERR_PTR(-ENOMEM);
8342 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8343 if (calldata == NULL)
8345 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8346 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
8348 nfs4_set_sequence_privileged(&calldata->args);
8349 msg.rpc_argp = &calldata->args;
8350 msg.rpc_resp = &calldata->res;
8351 calldata->clp = clp;
8352 task_setup_data.callback_data = calldata;
8354 ret = rpc_run_task(&task_setup_data);
8359 nfs_put_client(clp);
8361 nfs41_release_slot(slot);
8365 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8367 struct rpc_task *task;
8370 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8372 task = _nfs41_proc_sequence(clp, cred, NULL, false);
8374 ret = PTR_ERR(task);
8376 rpc_put_task_async(task);
8377 dprintk("<-- %s status=%d\n", __func__, ret);
8381 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8383 struct rpc_task *task;
8386 task = _nfs41_proc_sequence(clp, cred, NULL, true);
8388 ret = PTR_ERR(task);
8391 ret = rpc_wait_for_completion_task(task);
8393 ret = task->tk_status;
8396 dprintk("<-- %s status=%d\n", __func__, ret);
8400 struct nfs4_reclaim_complete_data {
8401 struct nfs_client *clp;
8402 struct nfs41_reclaim_complete_args arg;
8403 struct nfs41_reclaim_complete_res res;
8406 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8408 struct nfs4_reclaim_complete_data *calldata = data;
8410 nfs4_setup_sequence(calldata->clp,
8411 &calldata->arg.seq_args,
8412 &calldata->res.seq_res,
8416 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8418 switch(task->tk_status) {
8420 wake_up_all(&clp->cl_lock_waitq);
8422 case -NFS4ERR_COMPLETE_ALREADY:
8423 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8425 case -NFS4ERR_DELAY:
8426 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8428 case -NFS4ERR_RETRY_UNCACHED_REP:
8430 case -NFS4ERR_BADSESSION:
8431 case -NFS4ERR_DEADSESSION:
8432 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8433 nfs4_schedule_session_recovery(clp->cl_session,
8437 nfs4_schedule_lease_recovery(clp);
8442 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8444 struct nfs4_reclaim_complete_data *calldata = data;
8445 struct nfs_client *clp = calldata->clp;
8446 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8448 dprintk("--> %s\n", __func__);
8449 if (!nfs41_sequence_done(task, res))
8452 trace_nfs4_reclaim_complete(clp, task->tk_status);
8453 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8454 rpc_restart_call_prepare(task);
8457 dprintk("<-- %s\n", __func__);
8460 static void nfs4_free_reclaim_complete_data(void *data)
8462 struct nfs4_reclaim_complete_data *calldata = data;
8467 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8468 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8469 .rpc_call_done = nfs4_reclaim_complete_done,
8470 .rpc_release = nfs4_free_reclaim_complete_data,
8474 * Issue a global reclaim complete.
8476 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8477 struct rpc_cred *cred)
8479 struct nfs4_reclaim_complete_data *calldata;
8480 struct rpc_task *task;
8481 struct rpc_message msg = {
8482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8485 struct rpc_task_setup task_setup_data = {
8486 .rpc_client = clp->cl_rpcclient,
8487 .rpc_message = &msg,
8488 .callback_ops = &nfs4_reclaim_complete_call_ops,
8489 .flags = RPC_TASK_ASYNC,
8491 int status = -ENOMEM;
8493 dprintk("--> %s\n", __func__);
8494 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8495 if (calldata == NULL)
8497 calldata->clp = clp;
8498 calldata->arg.one_fs = 0;
8500 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8501 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8502 msg.rpc_argp = &calldata->arg;
8503 msg.rpc_resp = &calldata->res;
8504 task_setup_data.callback_data = calldata;
8505 task = rpc_run_task(&task_setup_data);
8507 status = PTR_ERR(task);
8510 status = rpc_wait_for_completion_task(task);
8512 status = task->tk_status;
8515 dprintk("<-- %s status=%d\n", __func__, status);
8520 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8522 struct nfs4_layoutget *lgp = calldata;
8523 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8525 dprintk("--> %s\n", __func__);
8526 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8527 &lgp->res.seq_res, task);
8528 dprintk("<-- %s\n", __func__);
8531 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8533 struct nfs4_layoutget *lgp = calldata;
8535 dprintk("--> %s\n", __func__);
8536 nfs41_sequence_process(task, &lgp->res.seq_res);
8537 dprintk("<-- %s\n", __func__);
8541 nfs4_layoutget_handle_exception(struct rpc_task *task,
8542 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8544 struct inode *inode = lgp->args.inode;
8545 struct nfs_server *server = NFS_SERVER(inode);
8546 struct pnfs_layout_hdr *lo;
8547 int nfs4err = task->tk_status;
8548 int err, status = 0;
8551 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8558 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8559 * on the file. set tk_status to -ENODATA to tell upper layer to
8562 case -NFS4ERR_LAYOUTUNAVAILABLE:
8566 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8567 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8569 case -NFS4ERR_BADLAYOUT:
8570 status = -EOVERFLOW;
8573 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8574 * (or clients) writing to the same RAID stripe except when
8575 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8577 * Treat it like we would RECALLCONFLICT -- we retry for a little
8578 * while, and then eventually give up.
8580 case -NFS4ERR_LAYOUTTRYLATER:
8581 if (lgp->args.minlength == 0) {
8582 status = -EOVERFLOW;
8587 case -NFS4ERR_RECALLCONFLICT:
8588 status = -ERECALLCONFLICT;
8590 case -NFS4ERR_DELEG_REVOKED:
8591 case -NFS4ERR_ADMIN_REVOKED:
8592 case -NFS4ERR_EXPIRED:
8593 case -NFS4ERR_BAD_STATEID:
8594 exception->timeout = 0;
8595 spin_lock(&inode->i_lock);
8596 lo = NFS_I(inode)->layout;
8597 /* If the open stateid was bad, then recover it. */
8598 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8599 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
8600 spin_unlock(&inode->i_lock);
8601 exception->state = lgp->args.ctx->state;
8602 exception->stateid = &lgp->args.stateid;
8607 * Mark the bad layout state as invalid, then retry
8609 pnfs_mark_layout_stateid_invalid(lo, &head);
8610 spin_unlock(&inode->i_lock);
8611 nfs_commit_inode(inode, 0);
8612 pnfs_free_lseg_list(&head);
8617 nfs4_sequence_free_slot(&lgp->res.seq_res);
8618 err = nfs4_handle_exception(server, nfs4err, exception);
8620 if (exception->retry)
8626 dprintk("<-- %s\n", __func__);
8630 static size_t max_response_pages(struct nfs_server *server)
8632 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8633 return nfs_page_array_len(0, max_resp_sz);
8636 static void nfs4_free_pages(struct page **pages, size_t size)
8643 for (i = 0; i < size; i++) {
8646 __free_page(pages[i]);
8651 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8653 struct page **pages;
8656 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8658 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8662 for (i = 0; i < size; i++) {
8663 pages[i] = alloc_page(gfp_flags);
8665 dprintk("%s: failed to allocate page\n", __func__);
8666 nfs4_free_pages(pages, size);
8674 static void nfs4_layoutget_release(void *calldata)
8676 struct nfs4_layoutget *lgp = calldata;
8677 struct inode *inode = lgp->args.inode;
8678 struct nfs_server *server = NFS_SERVER(inode);
8679 size_t max_pages = max_response_pages(server);
8681 dprintk("--> %s\n", __func__);
8682 nfs4_sequence_free_slot(&lgp->res.seq_res);
8683 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8684 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8685 put_nfs_open_context(lgp->args.ctx);
8687 dprintk("<-- %s\n", __func__);
8690 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8691 .rpc_call_prepare = nfs4_layoutget_prepare,
8692 .rpc_call_done = nfs4_layoutget_done,
8693 .rpc_release = nfs4_layoutget_release,
8696 struct pnfs_layout_segment *
8697 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8699 struct inode *inode = lgp->args.inode;
8700 struct nfs_server *server = NFS_SERVER(inode);
8701 size_t max_pages = max_response_pages(server);
8702 struct rpc_task *task;
8703 struct rpc_message msg = {
8704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8705 .rpc_argp = &lgp->args,
8706 .rpc_resp = &lgp->res,
8707 .rpc_cred = lgp->cred,
8709 struct rpc_task_setup task_setup_data = {
8710 .rpc_client = server->client,
8711 .rpc_message = &msg,
8712 .callback_ops = &nfs4_layoutget_call_ops,
8713 .callback_data = lgp,
8714 .flags = RPC_TASK_ASYNC,
8716 struct pnfs_layout_segment *lseg = NULL;
8717 struct nfs4_exception exception = {
8719 .timeout = *timeout,
8723 dprintk("--> %s\n", __func__);
8725 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8726 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8728 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8729 if (!lgp->args.layout.pages) {
8730 nfs4_layoutget_release(lgp);
8731 return ERR_PTR(-ENOMEM);
8733 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8735 lgp->res.layoutp = &lgp->args.layout;
8736 lgp->res.seq_res.sr_slot = NULL;
8737 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8739 task = rpc_run_task(&task_setup_data);
8741 return ERR_CAST(task);
8742 status = rpc_wait_for_completion_task(task);
8744 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8745 *timeout = exception.timeout;
8748 trace_nfs4_layoutget(lgp->args.ctx,
8754 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8755 if (status == 0 && lgp->res.layoutp->len)
8756 lseg = pnfs_layout_process(lgp);
8758 dprintk("<-- %s status=%d\n", __func__, status);
8760 return ERR_PTR(status);
8765 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8767 struct nfs4_layoutreturn *lrp = calldata;
8769 dprintk("--> %s\n", __func__);
8770 nfs4_setup_sequence(lrp->clp,
8771 &lrp->args.seq_args,
8776 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8778 struct nfs4_layoutreturn *lrp = calldata;
8779 struct nfs_server *server;
8781 dprintk("--> %s\n", __func__);
8783 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8786 server = NFS_SERVER(lrp->args.inode);
8787 switch (task->tk_status) {
8788 case -NFS4ERR_OLD_STATEID:
8789 if (nfs4_refresh_layout_stateid(&lrp->args.stateid,
8794 task->tk_status = 0;
8798 case -NFS4ERR_DELAY:
8799 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8803 dprintk("<-- %s\n", __func__);
8806 task->tk_status = 0;
8807 nfs4_sequence_free_slot(&lrp->res.seq_res);
8808 rpc_restart_call_prepare(task);
8811 static void nfs4_layoutreturn_release(void *calldata)
8813 struct nfs4_layoutreturn *lrp = calldata;
8814 struct pnfs_layout_hdr *lo = lrp->args.layout;
8816 dprintk("--> %s\n", __func__);
8817 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8818 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8819 nfs4_sequence_free_slot(&lrp->res.seq_res);
8820 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8821 lrp->ld_private.ops->free(&lrp->ld_private);
8822 pnfs_put_layout_hdr(lrp->args.layout);
8823 nfs_iput_and_deactive(lrp->inode);
8825 dprintk("<-- %s\n", __func__);
8828 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8829 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8830 .rpc_call_done = nfs4_layoutreturn_done,
8831 .rpc_release = nfs4_layoutreturn_release,
8834 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8836 struct rpc_task *task;
8837 struct rpc_message msg = {
8838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8839 .rpc_argp = &lrp->args,
8840 .rpc_resp = &lrp->res,
8841 .rpc_cred = lrp->cred,
8843 struct rpc_task_setup task_setup_data = {
8844 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8845 .rpc_message = &msg,
8846 .callback_ops = &nfs4_layoutreturn_call_ops,
8847 .callback_data = lrp,
8851 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8852 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8853 &task_setup_data.rpc_client, &msg);
8855 dprintk("--> %s\n", __func__);
8857 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8859 nfs4_layoutreturn_release(lrp);
8862 task_setup_data.flags |= RPC_TASK_ASYNC;
8864 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8865 task = rpc_run_task(&task_setup_data);
8867 return PTR_ERR(task);
8869 status = task->tk_status;
8870 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8871 dprintk("<-- %s status=%d\n", __func__, status);
8877 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8878 struct pnfs_device *pdev,
8879 struct rpc_cred *cred)
8881 struct nfs4_getdeviceinfo_args args = {
8883 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8884 NOTIFY_DEVICEID4_DELETE,
8886 struct nfs4_getdeviceinfo_res res = {
8889 struct rpc_message msg = {
8890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8897 dprintk("--> %s\n", __func__);
8898 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8899 if (res.notification & ~args.notify_types)
8900 dprintk("%s: unsupported notification\n", __func__);
8901 if (res.notification != args.notify_types)
8904 dprintk("<-- %s status=%d\n", __func__, status);
8909 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8910 struct pnfs_device *pdev,
8911 struct rpc_cred *cred)
8913 struct nfs4_exception exception = { };
8917 err = nfs4_handle_exception(server,
8918 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8920 } while (exception.retry);
8923 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8925 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8927 struct nfs4_layoutcommit_data *data = calldata;
8928 struct nfs_server *server = NFS_SERVER(data->args.inode);
8930 nfs4_setup_sequence(server->nfs_client,
8931 &data->args.seq_args,
8937 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8939 struct nfs4_layoutcommit_data *data = calldata;
8940 struct nfs_server *server = NFS_SERVER(data->args.inode);
8942 if (!nfs41_sequence_done(task, &data->res.seq_res))
8945 switch (task->tk_status) { /* Just ignore these failures */
8946 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8947 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8948 case -NFS4ERR_BADLAYOUT: /* no layout */
8949 case -NFS4ERR_GRACE: /* loca_recalim always false */
8950 task->tk_status = 0;
8954 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8955 rpc_restart_call_prepare(task);
8961 static void nfs4_layoutcommit_release(void *calldata)
8963 struct nfs4_layoutcommit_data *data = calldata;
8965 pnfs_cleanup_layoutcommit(data);
8966 nfs_post_op_update_inode_force_wcc(data->args.inode,
8968 put_rpccred(data->cred);
8969 nfs_iput_and_deactive(data->inode);
8973 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8974 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8975 .rpc_call_done = nfs4_layoutcommit_done,
8976 .rpc_release = nfs4_layoutcommit_release,
8980 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8982 struct rpc_message msg = {
8983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8984 .rpc_argp = &data->args,
8985 .rpc_resp = &data->res,
8986 .rpc_cred = data->cred,
8988 struct rpc_task_setup task_setup_data = {
8989 .task = &data->task,
8990 .rpc_client = NFS_CLIENT(data->args.inode),
8991 .rpc_message = &msg,
8992 .callback_ops = &nfs4_layoutcommit_ops,
8993 .callback_data = data,
8995 struct rpc_task *task;
8998 dprintk("NFS: initiating layoutcommit call. sync %d "
8999 "lbw: %llu inode %lu\n", sync,
9000 data->args.lastbytewritten,
9001 data->args.inode->i_ino);
9004 data->inode = nfs_igrab_and_active(data->args.inode);
9005 if (data->inode == NULL) {
9006 nfs4_layoutcommit_release(data);
9009 task_setup_data.flags = RPC_TASK_ASYNC;
9011 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9012 task = rpc_run_task(&task_setup_data);
9014 return PTR_ERR(task);
9016 status = task->tk_status;
9017 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
9018 dprintk("%s: status %d\n", __func__, status);
9024 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9025 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9028 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9029 struct nfs_fsinfo *info,
9030 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
9032 struct nfs41_secinfo_no_name_args args = {
9033 .style = SECINFO_STYLE_CURRENT_FH,
9035 struct nfs4_secinfo_res res = {
9038 struct rpc_message msg = {
9039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9043 struct rpc_clnt *clnt = server->client;
9044 struct rpc_cred *cred = NULL;
9047 if (use_integrity) {
9048 clnt = server->nfs_client->cl_rpcclient;
9049 cred = nfs4_get_clid_cred(server->nfs_client);
9050 msg.rpc_cred = cred;
9053 dprintk("--> %s\n", __func__);
9054 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
9056 dprintk("<-- %s status=%d\n", __func__, status);
9065 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9066 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9068 struct nfs4_exception exception = { };
9071 /* first try using integrity protection */
9072 err = -NFS4ERR_WRONGSEC;
9074 /* try to use integrity protection with machine cred */
9075 if (_nfs4_is_integrity_protected(server->nfs_client))
9076 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9080 * if unable to use integrity protection, or SECINFO with
9081 * integrity protection returns NFS4ERR_WRONGSEC (which is
9082 * disallowed by spec, but exists in deployed servers) use
9083 * the current filesystem's rpc_client and the user cred.
9085 if (err == -NFS4ERR_WRONGSEC)
9086 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9091 case -NFS4ERR_WRONGSEC:
9095 err = nfs4_handle_exception(server, err, &exception);
9097 } while (exception.retry);
9103 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9104 struct nfs_fsinfo *info)
9108 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
9109 struct nfs4_secinfo_flavors *flavors;
9110 struct nfs4_secinfo4 *secinfo;
9113 page = alloc_page(GFP_KERNEL);
9119 flavors = page_address(page);
9120 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9123 * Fall back on "guess and check" method if
9124 * the server doesn't support SECINFO_NO_NAME
9126 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
9127 err = nfs4_find_root_sec(server, fhandle, info);
9133 for (i = 0; i < flavors->num_flavors; i++) {
9134 secinfo = &flavors->flavors[i];
9136 switch (secinfo->flavor) {
9140 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9141 &secinfo->flavor_info);
9144 flavor = RPC_AUTH_MAXFLAVOR;
9148 if (!nfs_auth_info_match(&server->auth_info, flavor))
9149 flavor = RPC_AUTH_MAXFLAVOR;
9151 if (flavor != RPC_AUTH_MAXFLAVOR) {
9152 err = nfs4_lookup_root_sec(server, fhandle,
9159 if (flavor == RPC_AUTH_MAXFLAVOR)
9170 static int _nfs41_test_stateid(struct nfs_server *server,
9171 nfs4_stateid *stateid,
9172 struct rpc_cred *cred)
9175 struct nfs41_test_stateid_args args = {
9178 struct nfs41_test_stateid_res res;
9179 struct rpc_message msg = {
9180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9185 struct rpc_clnt *rpc_client = server->client;
9187 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9190 dprintk("NFS call test_stateid %p\n", stateid);
9191 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
9192 nfs4_set_sequence_privileged(&args.seq_args);
9193 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
9194 &args.seq_args, &res.seq_res);
9195 if (status != NFS_OK) {
9196 dprintk("NFS reply test_stateid: failed, %d\n", status);
9199 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
9203 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9204 int err, struct nfs4_exception *exception)
9206 exception->retry = 0;
9208 case -NFS4ERR_DELAY:
9209 case -NFS4ERR_RETRY_UNCACHED_REP:
9210 nfs4_handle_exception(server, err, exception);
9212 case -NFS4ERR_BADSESSION:
9213 case -NFS4ERR_BADSLOT:
9214 case -NFS4ERR_BAD_HIGH_SLOT:
9215 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9216 case -NFS4ERR_DEADSESSION:
9217 nfs4_do_handle_exception(server, err, exception);
9222 * nfs41_test_stateid - perform a TEST_STATEID operation
9224 * @server: server / transport on which to perform the operation
9225 * @stateid: state ID to test
9228 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9229 * Otherwise a negative NFS4ERR value is returned if the operation
9230 * failed or the state ID is not currently valid.
9232 static int nfs41_test_stateid(struct nfs_server *server,
9233 nfs4_stateid *stateid,
9234 struct rpc_cred *cred)
9236 struct nfs4_exception exception = { };
9239 err = _nfs41_test_stateid(server, stateid, cred);
9240 nfs4_handle_delay_or_session_error(server, err, &exception);
9241 } while (exception.retry);
9245 struct nfs_free_stateid_data {
9246 struct nfs_server *server;
9247 struct nfs41_free_stateid_args args;
9248 struct nfs41_free_stateid_res res;
9251 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9253 struct nfs_free_stateid_data *data = calldata;
9254 nfs4_setup_sequence(data->server->nfs_client,
9255 &data->args.seq_args,
9260 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9262 struct nfs_free_stateid_data *data = calldata;
9264 nfs41_sequence_done(task, &data->res.seq_res);
9266 switch (task->tk_status) {
9267 case -NFS4ERR_DELAY:
9268 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9269 rpc_restart_call_prepare(task);
9273 static void nfs41_free_stateid_release(void *calldata)
9278 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9279 .rpc_call_prepare = nfs41_free_stateid_prepare,
9280 .rpc_call_done = nfs41_free_stateid_done,
9281 .rpc_release = nfs41_free_stateid_release,
9284 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9285 const nfs4_stateid *stateid,
9286 struct rpc_cred *cred,
9289 struct rpc_message msg = {
9290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9293 struct rpc_task_setup task_setup = {
9294 .rpc_client = server->client,
9295 .rpc_message = &msg,
9296 .callback_ops = &nfs41_free_stateid_ops,
9297 .flags = RPC_TASK_ASYNC,
9299 struct nfs_free_stateid_data *data;
9301 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9302 &task_setup.rpc_client, &msg);
9304 dprintk("NFS call free_stateid %p\n", stateid);
9305 data = kmalloc(sizeof(*data), GFP_NOFS);
9307 return ERR_PTR(-ENOMEM);
9308 data->server = server;
9309 nfs4_stateid_copy(&data->args.stateid, stateid);
9311 task_setup.callback_data = data;
9313 msg.rpc_argp = &data->args;
9314 msg.rpc_resp = &data->res;
9315 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9317 nfs4_set_sequence_privileged(&data->args.seq_args);
9319 return rpc_run_task(&task_setup);
9323 * nfs41_free_stateid - perform a FREE_STATEID operation
9325 * @server: server / transport on which to perform the operation
9326 * @stateid: state ID to release
9328 * @is_recovery: set to true if this call needs to be privileged
9330 * Note: this function is always asynchronous.
9332 static int nfs41_free_stateid(struct nfs_server *server,
9333 const nfs4_stateid *stateid,
9334 struct rpc_cred *cred,
9337 struct rpc_task *task;
9339 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9341 return PTR_ERR(task);
9347 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9349 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9351 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9352 nfs4_free_lock_state(server, lsp);
9355 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9356 const nfs4_stateid *s2)
9358 if (s1->type != s2->type)
9361 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9364 if (s1->seqid == s2->seqid)
9367 return s1->seqid == 0 || s2->seqid == 0;
9370 #endif /* CONFIG_NFS_V4_1 */
9372 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9373 const nfs4_stateid *s2)
9375 return nfs4_stateid_match(s1, s2);
9379 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9380 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9381 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9382 .recover_open = nfs4_open_reclaim,
9383 .recover_lock = nfs4_lock_reclaim,
9384 .establish_clid = nfs4_init_clientid,
9385 .detect_trunking = nfs40_discover_server_trunking,
9388 #if defined(CONFIG_NFS_V4_1)
9389 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9390 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9391 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9392 .recover_open = nfs4_open_reclaim,
9393 .recover_lock = nfs4_lock_reclaim,
9394 .establish_clid = nfs41_init_clientid,
9395 .reclaim_complete = nfs41_proc_reclaim_complete,
9396 .detect_trunking = nfs41_discover_server_trunking,
9398 #endif /* CONFIG_NFS_V4_1 */
9400 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9401 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9402 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9403 .recover_open = nfs40_open_expired,
9404 .recover_lock = nfs4_lock_expired,
9405 .establish_clid = nfs4_init_clientid,
9408 #if defined(CONFIG_NFS_V4_1)
9409 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9410 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9411 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9412 .recover_open = nfs41_open_expired,
9413 .recover_lock = nfs41_lock_expired,
9414 .establish_clid = nfs41_init_clientid,
9416 #endif /* CONFIG_NFS_V4_1 */
9418 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9419 .sched_state_renewal = nfs4_proc_async_renew,
9420 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9421 .renew_lease = nfs4_proc_renew,
9424 #if defined(CONFIG_NFS_V4_1)
9425 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9426 .sched_state_renewal = nfs41_proc_async_sequence,
9427 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9428 .renew_lease = nfs4_proc_sequence,
9432 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9433 .get_locations = _nfs40_proc_get_locations,
9434 .fsid_present = _nfs40_proc_fsid_present,
9437 #if defined(CONFIG_NFS_V4_1)
9438 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9439 .get_locations = _nfs41_proc_get_locations,
9440 .fsid_present = _nfs41_proc_fsid_present,
9442 #endif /* CONFIG_NFS_V4_1 */
9444 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9446 .init_caps = NFS_CAP_READDIRPLUS
9447 | NFS_CAP_ATOMIC_OPEN
9448 | NFS_CAP_POSIX_LOCK,
9449 .init_client = nfs40_init_client,
9450 .shutdown_client = nfs40_shutdown_client,
9451 .match_stateid = nfs4_match_stateid,
9452 .find_root_sec = nfs4_find_root_sec,
9453 .free_lock_state = nfs4_release_lockowner,
9454 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9455 .alloc_seqid = nfs_alloc_seqid,
9456 .call_sync_ops = &nfs40_call_sync_ops,
9457 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9458 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9459 .state_renewal_ops = &nfs40_state_renewal_ops,
9460 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9463 #if defined(CONFIG_NFS_V4_1)
9464 static struct nfs_seqid *
9465 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9470 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9472 .init_caps = NFS_CAP_READDIRPLUS
9473 | NFS_CAP_ATOMIC_OPEN
9474 | NFS_CAP_POSIX_LOCK
9475 | NFS_CAP_STATEID_NFSV41
9476 | NFS_CAP_ATOMIC_OPEN_V1,
9477 .init_client = nfs41_init_client,
9478 .shutdown_client = nfs41_shutdown_client,
9479 .match_stateid = nfs41_match_stateid,
9480 .find_root_sec = nfs41_find_root_sec,
9481 .free_lock_state = nfs41_free_lock_state,
9482 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9483 .alloc_seqid = nfs_alloc_no_seqid,
9484 .session_trunk = nfs4_test_session_trunk,
9485 .call_sync_ops = &nfs41_call_sync_ops,
9486 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9487 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9488 .state_renewal_ops = &nfs41_state_renewal_ops,
9489 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9493 #if defined(CONFIG_NFS_V4_2)
9494 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9496 .init_caps = NFS_CAP_READDIRPLUS
9497 | NFS_CAP_ATOMIC_OPEN
9498 | NFS_CAP_POSIX_LOCK
9499 | NFS_CAP_STATEID_NFSV41
9500 | NFS_CAP_ATOMIC_OPEN_V1
9503 | NFS_CAP_DEALLOCATE
9505 | NFS_CAP_LAYOUTSTATS
9507 .init_client = nfs41_init_client,
9508 .shutdown_client = nfs41_shutdown_client,
9509 .match_stateid = nfs41_match_stateid,
9510 .find_root_sec = nfs41_find_root_sec,
9511 .free_lock_state = nfs41_free_lock_state,
9512 .call_sync_ops = &nfs41_call_sync_ops,
9513 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9514 .alloc_seqid = nfs_alloc_no_seqid,
9515 .session_trunk = nfs4_test_session_trunk,
9516 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9517 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9518 .state_renewal_ops = &nfs41_state_renewal_ops,
9519 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9523 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9524 [0] = &nfs_v4_0_minor_ops,
9525 #if defined(CONFIG_NFS_V4_1)
9526 [1] = &nfs_v4_1_minor_ops,
9528 #if defined(CONFIG_NFS_V4_2)
9529 [2] = &nfs_v4_2_minor_ops,
9533 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9535 ssize_t error, error2;
9537 error = generic_listxattr(dentry, list, size);
9545 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9548 return error + error2;
9551 static const struct inode_operations nfs4_dir_inode_operations = {
9552 .create = nfs_create,
9553 .lookup = nfs_lookup,
9554 .atomic_open = nfs_atomic_open,
9556 .unlink = nfs_unlink,
9557 .symlink = nfs_symlink,
9561 .rename = nfs_rename,
9562 .permission = nfs_permission,
9563 .getattr = nfs_getattr,
9564 .setattr = nfs_setattr,
9565 .listxattr = nfs4_listxattr,
9568 static const struct inode_operations nfs4_file_inode_operations = {
9569 .permission = nfs_permission,
9570 .getattr = nfs_getattr,
9571 .setattr = nfs_setattr,
9572 .listxattr = nfs4_listxattr,
9575 const struct nfs_rpc_ops nfs_v4_clientops = {
9576 .version = 4, /* protocol version */
9577 .dentry_ops = &nfs4_dentry_operations,
9578 .dir_inode_ops = &nfs4_dir_inode_operations,
9579 .file_inode_ops = &nfs4_file_inode_operations,
9580 .file_ops = &nfs4_file_operations,
9581 .getroot = nfs4_proc_get_root,
9582 .submount = nfs4_submount,
9583 .try_mount = nfs4_try_mount,
9584 .getattr = nfs4_proc_getattr,
9585 .setattr = nfs4_proc_setattr,
9586 .lookup = nfs4_proc_lookup,
9587 .lookupp = nfs4_proc_lookupp,
9588 .access = nfs4_proc_access,
9589 .readlink = nfs4_proc_readlink,
9590 .create = nfs4_proc_create,
9591 .remove = nfs4_proc_remove,
9592 .unlink_setup = nfs4_proc_unlink_setup,
9593 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9594 .unlink_done = nfs4_proc_unlink_done,
9595 .rename_setup = nfs4_proc_rename_setup,
9596 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9597 .rename_done = nfs4_proc_rename_done,
9598 .link = nfs4_proc_link,
9599 .symlink = nfs4_proc_symlink,
9600 .mkdir = nfs4_proc_mkdir,
9601 .rmdir = nfs4_proc_remove,
9602 .readdir = nfs4_proc_readdir,
9603 .mknod = nfs4_proc_mknod,
9604 .statfs = nfs4_proc_statfs,
9605 .fsinfo = nfs4_proc_fsinfo,
9606 .pathconf = nfs4_proc_pathconf,
9607 .set_capabilities = nfs4_server_capabilities,
9608 .decode_dirent = nfs4_decode_dirent,
9609 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9610 .read_setup = nfs4_proc_read_setup,
9611 .read_done = nfs4_read_done,
9612 .write_setup = nfs4_proc_write_setup,
9613 .write_done = nfs4_write_done,
9614 .commit_setup = nfs4_proc_commit_setup,
9615 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9616 .commit_done = nfs4_commit_done,
9617 .lock = nfs4_proc_lock,
9618 .clear_acl_cache = nfs4_zap_acl_attr,
9619 .close_context = nfs4_close_context,
9620 .open_context = nfs4_atomic_open,
9621 .have_delegation = nfs4_have_delegation,
9622 .return_delegation = nfs4_inode_return_delegation,
9623 .alloc_client = nfs4_alloc_client,
9624 .init_client = nfs4_init_client,
9625 .free_client = nfs4_free_client,
9626 .create_server = nfs4_create_server,
9627 .clone_server = nfs_clone_server,
9630 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9631 .name = XATTR_NAME_NFSV4_ACL,
9632 .list = nfs4_xattr_list_nfs4_acl,
9633 .get = nfs4_xattr_get_nfs4_acl,
9634 .set = nfs4_xattr_set_nfs4_acl,
9637 const struct xattr_handler *nfs4_xattr_handlers[] = {
9638 &nfs4_xattr_nfs4_acl_handler,
9639 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9640 &nfs4_xattr_nfs4_label_handler,