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/utsname.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/smp_lock.h>
48 #include <linux/namei.h>
50 #include "delegation.h"
52 #define NFSDBG_FACILITY NFSDBG_PROC
54 #define NFS4_POLL_RETRY_MIN (1*HZ)
55 #define NFS4_POLL_RETRY_MAX (15*HZ)
57 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
58 static int nfs4_async_handle_error(struct rpc_task *, struct nfs_server *);
59 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
60 extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
61 extern struct rpc_procinfo nfs4_procedures[];
63 extern nfs4_stateid zero_stateid;
65 /* Prevent leaks of NFSv4 errors into userland */
66 static inline int nfs4_map_errors(int err)
69 printk(KERN_WARNING "%s could not handle NFSv4 error %d\n",
77 * This is our standard bitmap for GETATTR requests.
79 const u32 nfs4_fattr_bitmap[2] = {
84 | FATTR4_WORD0_FILEID,
86 | FATTR4_WORD1_NUMLINKS
88 | FATTR4_WORD1_OWNER_GROUP
90 | FATTR4_WORD1_SPACE_USED
91 | FATTR4_WORD1_TIME_ACCESS
92 | FATTR4_WORD1_TIME_METADATA
93 | FATTR4_WORD1_TIME_MODIFY
96 const u32 nfs4_statfs_bitmap[2] = {
97 FATTR4_WORD0_FILES_AVAIL
98 | FATTR4_WORD0_FILES_FREE
99 | FATTR4_WORD0_FILES_TOTAL,
100 FATTR4_WORD1_SPACE_AVAIL
101 | FATTR4_WORD1_SPACE_FREE
102 | FATTR4_WORD1_SPACE_TOTAL
105 u32 nfs4_pathconf_bitmap[2] = {
107 | FATTR4_WORD0_MAXNAME,
111 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
112 | FATTR4_WORD0_MAXREAD
113 | FATTR4_WORD0_MAXWRITE
114 | FATTR4_WORD0_LEASE_TIME,
118 static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
119 struct nfs4_readdir_arg *readdir)
123 BUG_ON(readdir->count < 80);
125 readdir->cookie = (cookie > 2) ? cookie : 0;
126 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
131 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
136 * NFSv4 servers do not return entries for '.' and '..'
137 * Therefore, we fake these entries here. We let '.'
138 * have cookie 0 and '..' have cookie 1. Note that
139 * when talking to the server, we always send cookie 0
142 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
145 *p++ = xdr_one; /* next */
146 *p++ = xdr_zero; /* cookie, first word */
147 *p++ = xdr_one; /* cookie, second word */
148 *p++ = xdr_one; /* entry len */
149 memcpy(p, ".\0\0\0", 4); /* entry */
151 *p++ = xdr_one; /* bitmap length */
152 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
153 *p++ = htonl(8); /* attribute buffer length */
154 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
157 *p++ = xdr_one; /* next */
158 *p++ = xdr_zero; /* cookie, first word */
159 *p++ = xdr_two; /* cookie, second word */
160 *p++ = xdr_two; /* entry len */
161 memcpy(p, "..\0\0", 4); /* entry */
163 *p++ = xdr_one; /* bitmap length */
164 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
165 *p++ = htonl(8); /* attribute buffer length */
166 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
168 readdir->pgbase = (char *)p - (char *)start;
169 readdir->count -= readdir->pgbase;
170 kunmap_atomic(start, KM_USER0);
174 renew_lease(struct nfs_server *server, unsigned long timestamp)
176 struct nfs4_client *clp = server->nfs4_state;
177 spin_lock(&clp->cl_lock);
178 if (time_before(clp->cl_last_renewal,timestamp))
179 clp->cl_last_renewal = timestamp;
180 spin_unlock(&clp->cl_lock);
183 static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
185 struct nfs_inode *nfsi = NFS_I(inode);
187 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
188 nfsi->change_attr = cinfo->after;
193 * reclaim state on the server after a reboot.
194 * Assumes caller is holding the sp->so_sem
196 static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
198 struct inode *inode = state->inode;
199 struct nfs_server *server = NFS_SERVER(inode);
200 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
201 struct nfs_openargs o_arg = {
203 .seqid = sp->so_seqid,
205 .open_flags = state->state,
206 .clientid = server->nfs4_state->cl_clientid,
207 .claim = NFS4_OPEN_CLAIM_PREVIOUS,
208 .bitmask = server->attr_bitmask,
210 struct nfs_openres o_res = {
211 .server = server, /* Grrr */
213 struct rpc_message msg = {
214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
217 .rpc_cred = sp->so_cred,
221 if (delegation != NULL) {
222 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
223 memcpy(&state->stateid, &delegation->stateid,
224 sizeof(state->stateid));
225 set_bit(NFS_DELEGATED_STATE, &state->flags);
228 o_arg.u.delegation_type = delegation->type;
230 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
231 nfs4_increment_seqid(status, sp);
233 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
234 if (o_res.delegation_type != 0) {
235 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
236 /* Did the server issue an immediate delegation recall? */
238 nfs_async_inode_return_delegation(inode, &o_res.stateid);
241 clear_bit(NFS_DELEGATED_STATE, &state->flags);
242 /* Ensure we update the inode attributes */
247 int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
249 struct nfs_server *server = NFS_SERVER(state->inode);
250 struct nfs4_exception exception = { };
253 err = _nfs4_open_reclaim(sp, state);
256 case -NFS4ERR_STALE_CLIENTID:
257 case -NFS4ERR_STALE_STATEID:
258 case -NFS4ERR_EXPIRED:
261 err = nfs4_handle_exception(server, err, &exception);
262 } while (exception.retry);
266 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
268 struct nfs4_state_owner *sp = state->owner;
269 struct inode *inode = dentry->d_inode;
270 struct nfs_server *server = NFS_SERVER(inode);
271 struct dentry *parent = dget_parent(dentry);
272 struct nfs_openargs arg = {
273 .fh = NFS_FH(parent->d_inode),
274 .clientid = server->nfs4_state->cl_clientid,
275 .name = &dentry->d_name,
278 .bitmask = server->attr_bitmask,
279 .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
281 struct nfs_openres res = {
284 struct rpc_message msg = {
285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
288 .rpc_cred = sp->so_cred,
293 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
295 if (state->state == 0)
297 arg.seqid = sp->so_seqid;
298 arg.open_flags = state->state;
299 memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
300 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
301 nfs4_increment_seqid(status, sp);
303 memcpy(state->stateid.data, res.stateid.data,
304 sizeof(state->stateid.data));
305 clear_bit(NFS_DELEGATED_STATE, &state->flags);
313 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
315 struct nfs4_exception exception = { };
316 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
319 err = _nfs4_open_delegation_recall(dentry, state);
323 case -NFS4ERR_STALE_CLIENTID:
324 case -NFS4ERR_STALE_STATEID:
325 case -NFS4ERR_EXPIRED:
326 /* Don't recall a delegation if it was lost */
327 nfs4_schedule_state_recovery(server->nfs4_state);
330 err = nfs4_handle_exception(server, err, &exception);
331 } while (exception.retry);
335 static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid)
337 struct nfs_open_confirmargs arg = {
339 .seqid = sp->so_seqid,
342 struct nfs_open_confirmres res;
343 struct rpc_message msg = {
344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
347 .rpc_cred = sp->so_cred,
351 status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
352 nfs4_increment_seqid(status, sp);
354 memcpy(stateid, &res.stateid, sizeof(*stateid));
358 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
360 struct nfs_access_entry cache;
363 status = nfs_access_get_cached(inode, cred, &cache);
367 /* Be clever: ask server to check for all possible rights */
368 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
370 cache.jiffies = jiffies;
371 status = _nfs4_proc_access(inode, &cache);
374 nfs_access_add_cache(inode, &cache);
376 if ((cache.mask & mask) == mask)
382 * Returns an nfs4_state + an extra reference to the inode
384 int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
386 struct nfs_delegation *delegation;
387 struct nfs_server *server = NFS_SERVER(inode);
388 struct nfs4_client *clp = server->nfs4_state;
389 struct nfs_inode *nfsi = NFS_I(inode);
390 struct nfs4_state_owner *sp = NULL;
391 struct nfs4_state *state = NULL;
392 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
396 /* Protect against reboot recovery - NOTE ORDER! */
397 down_read(&clp->cl_sem);
398 /* Protect against delegation recall */
399 down_read(&nfsi->rwsem);
400 delegation = NFS_I(inode)->delegation;
402 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
405 if (!(sp = nfs4_get_state_owner(server, cred))) {
406 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
410 state = nfs4_get_open_state(inode, sp);
415 if ((state->state & open_flags) == open_flags) {
416 spin_lock(&inode->i_lock);
417 if (open_flags & FMODE_READ)
419 if (open_flags & FMODE_WRITE)
421 spin_unlock(&inode->i_lock);
423 } else if (state->state != 0)
427 err = _nfs4_do_access(inode, cred, mask);
431 spin_lock(&inode->i_lock);
432 memcpy(state->stateid.data, delegation->stateid.data,
433 sizeof(state->stateid.data));
434 state->state |= open_flags;
435 if (open_flags & FMODE_READ)
437 if (open_flags & FMODE_WRITE)
439 set_bit(NFS_DELEGATED_STATE, &state->flags);
440 spin_unlock(&inode->i_lock);
443 nfs4_put_state_owner(sp);
444 up_read(&nfsi->rwsem);
445 up_read(&clp->cl_sem);
452 nfs4_put_open_state(state);
454 nfs4_put_state_owner(sp);
456 up_read(&nfsi->rwsem);
457 up_read(&clp->cl_sem);
461 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
463 struct nfs4_exception exception = { };
464 struct nfs4_state *res;
468 err = _nfs4_open_delegated(inode, flags, cred, &res);
471 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
473 } while (exception.retry);
478 * Returns an nfs4_state + an referenced inode
480 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
482 struct nfs4_state_owner *sp;
483 struct nfs4_state *state = NULL;
484 struct nfs_server *server = NFS_SERVER(dir);
485 struct nfs4_client *clp = server->nfs4_state;
486 struct inode *inode = NULL;
488 struct nfs_fattr f_attr = {
491 struct nfs_openargs o_arg = {
494 .name = &dentry->d_name,
496 .bitmask = server->attr_bitmask,
497 .claim = NFS4_OPEN_CLAIM_NULL,
499 struct nfs_openres o_res = {
503 struct rpc_message msg = {
504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
510 /* Protect against reboot recovery conflicts */
511 down_read(&clp->cl_sem);
513 if (!(sp = nfs4_get_state_owner(server, cred))) {
514 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
517 if (flags & O_EXCL) {
518 u32 *p = (u32 *) o_arg.u.verifier.data;
522 o_arg.u.attrs = sattr;
523 /* Serialization for the sequence id */
525 o_arg.seqid = sp->so_seqid;
526 o_arg.id = sp->so_id;
527 o_arg.clientid = clp->cl_clientid,
529 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
530 nfs4_increment_seqid(status, sp);
533 update_changeattr(dir, &o_res.cinfo);
534 if(o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
535 status = _nfs4_proc_open_confirm(server->client, &o_res.fh,
540 if (!(f_attr.valid & NFS_ATTR_FATTR)) {
541 status = server->rpc_ops->getattr(server, &o_res.fh, &f_attr);
547 inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
550 state = nfs4_get_open_state(inode, sp);
553 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
554 spin_lock(&inode->i_lock);
555 if (flags & FMODE_READ)
557 if (flags & FMODE_WRITE)
559 state->state |= flags & (FMODE_READ|FMODE_WRITE);
560 spin_unlock(&inode->i_lock);
561 if (o_res.delegation_type != 0)
562 nfs_inode_set_delegation(inode, cred, &o_res);
564 nfs4_put_state_owner(sp);
565 up_read(&clp->cl_sem);
571 nfs4_put_open_state(state);
573 nfs4_put_state_owner(sp);
575 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
576 up_read(&clp->cl_sem);
584 struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
586 struct nfs4_exception exception = { };
587 struct nfs4_state *res;
591 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
594 /* NOTE: BAD_SEQID means the server and client disagree about the
595 * book-keeping w.r.t. state-changing operations
596 * (OPEN/CLOSE/LOCK/LOCKU...)
597 * It is actually a sign of a bug on the client or on the server.
599 * If we receive a BAD_SEQID error in the particular case of
600 * doing an OPEN, we assume that nfs4_increment_seqid() will
601 * have unhashed the old state_owner for us, and that we can
602 * therefore safely retry using a new one. We should still warn
605 if (status == -NFS4ERR_BAD_SEQID) {
606 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
610 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
611 status, &exception));
612 } while (exception.retry);
616 static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
617 struct nfs_fh *fhandle, struct iattr *sattr,
618 struct nfs4_state *state)
620 struct nfs_setattrargs arg = {
624 .bitmask = server->attr_bitmask,
626 struct nfs_setattrres res = {
630 struct rpc_message msg = {
631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
639 msg.rpc_cred = state->owner->so_cred;
640 if (sattr->ia_valid & ATTR_SIZE)
641 nfs4_copy_stateid(&arg.stateid, state, NULL);
643 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
645 return rpc_call_sync(server->client, &msg, 0);
648 int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
649 struct nfs_fh *fhandle, struct iattr *sattr,
650 struct nfs4_state *state)
652 struct nfs4_exception exception = { };
655 err = nfs4_handle_exception(server,
656 _nfs4_do_setattr(server, fattr, fhandle, sattr,
659 } while (exception.retry);
663 struct nfs4_closedata {
665 struct nfs4_state *state;
666 struct nfs_closeargs arg;
667 struct nfs_closeres res;
670 static void nfs4_close_done(struct rpc_task *task)
672 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
673 struct nfs4_state *state = calldata->state;
674 struct nfs4_state_owner *sp = state->owner;
675 struct nfs_server *server = NFS_SERVER(calldata->inode);
677 /* hmm. we are done with the inode, and in the process of freeing
678 * the state_owner. we keep this around to process errors
680 nfs4_increment_seqid(task->tk_status, sp);
681 switch (task->tk_status) {
683 state->state = calldata->arg.open_flags;
684 memcpy(&state->stateid, &calldata->res.stateid,
685 sizeof(state->stateid));
687 case -NFS4ERR_STALE_STATEID:
688 case -NFS4ERR_EXPIRED:
689 state->state = calldata->arg.open_flags;
690 nfs4_schedule_state_recovery(server->nfs4_state);
693 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
694 rpc_restart_call(task);
698 nfs4_put_open_state(state);
700 nfs4_put_state_owner(sp);
701 up_read(&server->nfs4_state->cl_sem);
705 static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *calldata)
707 struct rpc_message msg = {
708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
709 .rpc_argp = &calldata->arg,
710 .rpc_resp = &calldata->res,
711 .rpc_cred = calldata->state->owner->so_cred,
713 if (calldata->arg.open_flags != 0)
714 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
715 return rpc_call_async(clnt, &msg, 0, nfs4_close_done, calldata);
719 * It is possible for data to be read/written from a mem-mapped file
720 * after the sys_close call (which hits the vfs layer as a flush).
721 * This means that we can't safely call nfsv4 close on a file until
722 * the inode is cleared. This in turn means that we are not good
723 * NFSv4 citizens - we do not indicate to the server to update the file's
724 * share state even when we are done with one of the three share
725 * stateid's in the inode.
727 * NOTE: Caller must be holding the sp->so_owner semaphore!
729 int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
731 struct nfs4_closedata *calldata;
734 /* Tell caller we're done */
735 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
739 calldata = (struct nfs4_closedata *)kmalloc(sizeof(*calldata), GFP_KERNEL);
740 if (calldata == NULL)
742 calldata->inode = inode;
743 calldata->state = state;
744 calldata->arg.fh = NFS_FH(inode);
745 /* Serialization for the sequence id */
746 calldata->arg.seqid = state->owner->so_seqid;
747 calldata->arg.open_flags = mode;
748 memcpy(&calldata->arg.stateid, &state->stateid,
749 sizeof(calldata->arg.stateid));
750 status = nfs4_close_call(NFS_SERVER(inode)->client, calldata);
752 * Return -EINPROGRESS on success in order to indicate to the
753 * caller that an asynchronous RPC call has been launched, and
754 * that it will release the semaphores on completion.
756 return (status == 0) ? -EINPROGRESS : status;
760 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
763 struct rpc_cred *cred;
764 struct nfs4_state *state;
766 if (nd->flags & LOOKUP_CREATE) {
767 attr.ia_mode = nd->intent.open.create_mode;
768 attr.ia_valid = ATTR_MODE;
769 if (!IS_POSIXACL(dir))
770 attr.ia_mode &= ~current->fs->umask;
773 BUG_ON(nd->intent.open.flags & O_CREAT);
776 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
777 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
780 return (struct inode *)state;
785 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags)
787 struct rpc_cred *cred;
788 struct nfs4_state *state;
791 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
792 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
794 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
796 if (state == ERR_PTR(-ENOENT) && dentry->d_inode == 0)
800 inode = state->inode;
801 if (inode == dentry->d_inode) {
806 nfs4_close_state(state, openflags);
812 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
814 struct nfs4_server_caps_res res = {};
815 struct rpc_message msg = {
816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
822 status = rpc_call_sync(server->client, &msg, 0);
824 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
825 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
826 server->caps |= NFS_CAP_ACLS;
827 if (res.has_links != 0)
828 server->caps |= NFS_CAP_HARDLINKS;
829 if (res.has_symlinks != 0)
830 server->caps |= NFS_CAP_SYMLINKS;
831 server->acl_bitmask = res.acl_bitmask;
836 static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
838 struct nfs4_exception exception = { };
841 err = nfs4_handle_exception(server,
842 _nfs4_server_capabilities(server, fhandle),
844 } while (exception.retry);
848 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
849 struct nfs_fsinfo *info)
851 struct nfs_fattr * fattr = info->fattr;
852 struct nfs4_lookup_root_arg args = {
853 .bitmask = nfs4_fattr_bitmap,
855 struct nfs4_lookup_res res = {
860 struct rpc_message msg = {
861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
866 return rpc_call_sync(server->client, &msg, 0);
869 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
870 struct nfs_fsinfo *info)
872 struct nfs4_exception exception = { };
875 err = nfs4_handle_exception(server,
876 _nfs4_lookup_root(server, fhandle, info),
878 } while (exception.retry);
882 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
883 struct nfs_fsinfo *info)
885 struct nfs_fattr * fattr = info->fattr;
888 struct nfs4_lookup_arg args = {
891 .bitmask = nfs4_fattr_bitmap,
893 struct nfs4_lookup_res res = {
898 struct rpc_message msg = {
899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
906 * Now we do a separate LOOKUP for each component of the mount path.
907 * The LOOKUPs are done separately so that we can conveniently
908 * catch an ERR_WRONGSEC if it occurs along the way...
910 status = nfs4_lookup_root(server, fhandle, info);
914 p = server->mnt_path;
916 struct nfs4_exception exception = { };
923 while (*p && (*p != '/'))
929 status = nfs4_handle_exception(server,
930 rpc_call_sync(server->client, &msg, 0),
932 } while (exception.retry);
935 if (status == -ENOENT) {
936 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
937 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
942 status = nfs4_server_capabilities(server, fhandle);
944 status = nfs4_do_fsinfo(server, fhandle, info);
949 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
951 struct nfs4_getattr_arg args = {
953 .bitmask = server->attr_bitmask,
955 struct nfs4_getattr_res res = {
959 struct rpc_message msg = {
960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
966 return rpc_call_sync(server->client, &msg, 0);
969 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
971 struct nfs4_exception exception = { };
974 err = nfs4_handle_exception(server,
975 _nfs4_proc_getattr(server, fhandle, fattr),
977 } while (exception.retry);
982 * The file is not closed if it is opened due to the a request to change
983 * the size of the file. The open call will not be needed once the
984 * VFS layer lookup-intents are implemented.
986 * Close is called when the inode is destroyed.
987 * If we haven't opened the file for O_WRONLY, we
988 * need to in the size_change case to obtain a stateid.
991 * Because OPEN is always done by name in nfsv4, it is
992 * possible that we opened a different file by the same
993 * name. We can recognize this race condition, but we
994 * can't do anything about it besides returning an error.
996 * This will be fixed with VFS changes (lookup-intent).
999 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1000 struct iattr *sattr)
1002 struct inode * inode = dentry->d_inode;
1003 int size_change = sattr->ia_valid & ATTR_SIZE;
1004 struct nfs4_state *state = NULL;
1011 struct rpc_cred *cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1012 state = nfs4_find_state(inode, cred, FMODE_WRITE);
1013 if (state == NULL) {
1014 state = nfs4_open_delegated(dentry->d_inode,
1017 state = nfs4_do_open(dentry->d_parent->d_inode,
1018 dentry, FMODE_WRITE,
1024 return PTR_ERR(state);
1026 if (state->inode != inode) {
1027 printk(KERN_WARNING "nfs: raced in setattr (%p != %p), returning -EIO\n", inode, state->inode);
1032 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1033 NFS_FH(inode), sattr, state);
1036 inode = state->inode;
1037 nfs4_close_state(state, FMODE_WRITE);
1044 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1045 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1048 struct nfs_server *server = NFS_SERVER(dir);
1049 struct nfs4_lookup_arg args = {
1050 .bitmask = server->attr_bitmask,
1051 .dir_fh = NFS_FH(dir),
1054 struct nfs4_lookup_res res = {
1059 struct rpc_message msg = {
1060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1067 dprintk("NFS call lookup %s\n", name->name);
1068 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1069 dprintk("NFS reply lookup: %d\n", status);
1073 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1075 struct nfs4_exception exception = { };
1078 err = nfs4_handle_exception(NFS_SERVER(dir),
1079 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1081 } while (exception.retry);
1085 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1087 struct nfs4_accessargs args = {
1088 .fh = NFS_FH(inode),
1090 struct nfs4_accessres res = { 0 };
1091 struct rpc_message msg = {
1092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1095 .rpc_cred = entry->cred,
1097 int mode = entry->mask;
1101 * Determine which access bits we want to ask for...
1103 if (mode & MAY_READ)
1104 args.access |= NFS4_ACCESS_READ;
1105 if (S_ISDIR(inode->i_mode)) {
1106 if (mode & MAY_WRITE)
1107 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1108 if (mode & MAY_EXEC)
1109 args.access |= NFS4_ACCESS_LOOKUP;
1111 if (mode & MAY_WRITE)
1112 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1113 if (mode & MAY_EXEC)
1114 args.access |= NFS4_ACCESS_EXECUTE;
1116 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1119 if (res.access & NFS4_ACCESS_READ)
1120 entry->mask |= MAY_READ;
1121 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1122 entry->mask |= MAY_WRITE;
1123 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1124 entry->mask |= MAY_EXEC;
1129 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1131 struct nfs4_exception exception = { };
1134 err = nfs4_handle_exception(NFS_SERVER(inode),
1135 _nfs4_proc_access(inode, entry),
1137 } while (exception.retry);
1142 * TODO: For the time being, we don't try to get any attributes
1143 * along with any of the zero-copy operations READ, READDIR,
1146 * In the case of the first three, we want to put the GETATTR
1147 * after the read-type operation -- this is because it is hard
1148 * to predict the length of a GETATTR response in v4, and thus
1149 * align the READ data correctly. This means that the GETATTR
1150 * may end up partially falling into the page cache, and we should
1151 * shift it into the 'tail' of the xdr_buf before processing.
1152 * To do this efficiently, we need to know the total length
1153 * of data received, which doesn't seem to be available outside
1156 * In the case of WRITE, we also want to put the GETATTR after
1157 * the operation -- in this case because we want to make sure
1158 * we get the post-operation mtime and size. This means that
1159 * we can't use xdr_encode_pages() as written: we need a variant
1160 * of it which would leave room in the 'tail' iovec.
1162 * Both of these changes to the XDR layer would in fact be quite
1163 * minor, but I decided to leave them for a subsequent patch.
1165 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1166 unsigned int pgbase, unsigned int pglen)
1168 struct nfs4_readlink args = {
1169 .fh = NFS_FH(inode),
1174 struct rpc_message msg = {
1175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1180 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1183 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1184 unsigned int pgbase, unsigned int pglen)
1186 struct nfs4_exception exception = { };
1189 err = nfs4_handle_exception(NFS_SERVER(inode),
1190 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1192 } while (exception.retry);
1196 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1198 int flags = rdata->flags;
1199 struct inode *inode = rdata->inode;
1200 struct nfs_fattr *fattr = rdata->res.fattr;
1201 struct nfs_server *server = NFS_SERVER(inode);
1202 struct rpc_message msg = {
1203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1204 .rpc_argp = &rdata->args,
1205 .rpc_resp = &rdata->res,
1206 .rpc_cred = rdata->cred,
1208 unsigned long timestamp = jiffies;
1211 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1212 (long long) rdata->args.offset);
1215 status = rpc_call_sync(server->client, &msg, flags);
1217 renew_lease(server, timestamp);
1218 dprintk("NFS reply read: %d\n", status);
1222 static int nfs4_proc_read(struct nfs_read_data *rdata)
1224 struct nfs4_exception exception = { };
1227 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1228 _nfs4_proc_read(rdata),
1230 } while (exception.retry);
1234 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1236 int rpcflags = wdata->flags;
1237 struct inode *inode = wdata->inode;
1238 struct nfs_fattr *fattr = wdata->res.fattr;
1239 struct nfs_server *server = NFS_SERVER(inode);
1240 struct rpc_message msg = {
1241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1242 .rpc_argp = &wdata->args,
1243 .rpc_resp = &wdata->res,
1244 .rpc_cred = wdata->cred,
1248 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1249 (long long) wdata->args.offset);
1252 status = rpc_call_sync(server->client, &msg, rpcflags);
1253 dprintk("NFS reply write: %d\n", status);
1257 static int nfs4_proc_write(struct nfs_write_data *wdata)
1259 struct nfs4_exception exception = { };
1262 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1263 _nfs4_proc_write(wdata),
1265 } while (exception.retry);
1269 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1271 struct inode *inode = cdata->inode;
1272 struct nfs_fattr *fattr = cdata->res.fattr;
1273 struct nfs_server *server = NFS_SERVER(inode);
1274 struct rpc_message msg = {
1275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1276 .rpc_argp = &cdata->args,
1277 .rpc_resp = &cdata->res,
1278 .rpc_cred = cdata->cred,
1282 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1283 (long long) cdata->args.offset);
1286 status = rpc_call_sync(server->client, &msg, 0);
1287 dprintk("NFS reply commit: %d\n", status);
1291 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1293 struct nfs4_exception exception = { };
1296 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1297 _nfs4_proc_commit(cdata),
1299 } while (exception.retry);
1305 * We will need to arrange for the VFS layer to provide an atomic open.
1306 * Until then, this create/open method is prone to inefficiency and race
1307 * conditions due to the lookup, create, and open VFS calls from sys_open()
1308 * placed on the wire.
1310 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1311 * The file will be opened again in the subsequent VFS open call
1312 * (nfs4_proc_file_open).
1314 * The open for read will just hang around to be used by any process that
1315 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1318 static struct inode *
1319 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1322 struct inode *inode;
1323 struct nfs4_state *state = NULL;
1324 struct rpc_cred *cred;
1326 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1327 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1329 if (!IS_ERR(state)) {
1330 inode = state->inode;
1331 if (flags & O_EXCL) {
1332 struct nfs_fattr fattr;
1334 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1335 NFS_FH(inode), sattr, state);
1337 nfs4_close_state(state, flags);
1339 inode = ERR_PTR(status);
1343 inode = (struct inode *)state;
1347 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1349 struct nfs4_remove_arg args = {
1353 struct nfs4_change_info res;
1354 struct rpc_message msg = {
1355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1361 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1363 update_changeattr(dir, &res);
1367 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1369 struct nfs4_exception exception = { };
1372 err = nfs4_handle_exception(NFS_SERVER(dir),
1373 _nfs4_proc_remove(dir, name),
1375 } while (exception.retry);
1379 struct unlink_desc {
1380 struct nfs4_remove_arg args;
1381 struct nfs4_change_info res;
1384 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1387 struct unlink_desc *up;
1389 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1393 up->args.fh = NFS_FH(dir->d_inode);
1394 up->args.name = name;
1396 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1397 msg->rpc_argp = &up->args;
1398 msg->rpc_resp = &up->res;
1402 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1404 struct rpc_message *msg = &task->tk_msg;
1405 struct unlink_desc *up;
1407 if (msg->rpc_resp != NULL) {
1408 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1409 update_changeattr(dir->d_inode, &up->res);
1411 msg->rpc_resp = NULL;
1412 msg->rpc_argp = NULL;
1417 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1418 struct inode *new_dir, struct qstr *new_name)
1420 struct nfs4_rename_arg arg = {
1421 .old_dir = NFS_FH(old_dir),
1422 .new_dir = NFS_FH(new_dir),
1423 .old_name = old_name,
1424 .new_name = new_name,
1426 struct nfs4_rename_res res = { };
1427 struct rpc_message msg = {
1428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1434 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
1437 update_changeattr(old_dir, &res.old_cinfo);
1438 update_changeattr(new_dir, &res.new_cinfo);
1443 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1444 struct inode *new_dir, struct qstr *new_name)
1446 struct nfs4_exception exception = { };
1449 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1450 _nfs4_proc_rename(old_dir, old_name,
1453 } while (exception.retry);
1457 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1459 struct nfs4_link_arg arg = {
1460 .fh = NFS_FH(inode),
1461 .dir_fh = NFS_FH(dir),
1464 struct nfs4_change_info cinfo = { };
1465 struct rpc_message msg = {
1466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1472 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1474 update_changeattr(dir, &cinfo);
1479 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1481 struct nfs4_exception exception = { };
1484 err = nfs4_handle_exception(NFS_SERVER(inode),
1485 _nfs4_proc_link(inode, dir, name),
1487 } while (exception.retry);
1491 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1492 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1493 struct nfs_fattr *fattr)
1495 struct nfs_server *server = NFS_SERVER(dir);
1496 struct nfs4_create_arg arg = {
1497 .dir_fh = NFS_FH(dir),
1502 .bitmask = server->attr_bitmask,
1504 struct nfs4_create_res res = {
1509 struct rpc_message msg = {
1510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1516 if (path->len > NFS4_MAXPATHLEN)
1517 return -ENAMETOOLONG;
1518 arg.u.symlink = path;
1521 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1523 update_changeattr(dir, &res.dir_cinfo);
1527 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1528 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1529 struct nfs_fattr *fattr)
1531 struct nfs4_exception exception = { };
1534 err = nfs4_handle_exception(NFS_SERVER(dir),
1535 _nfs4_proc_symlink(dir, name, path, sattr,
1538 } while (exception.retry);
1542 static int _nfs4_proc_mkdir(struct inode *dir, struct qstr *name,
1543 struct iattr *sattr, struct nfs_fh *fhandle,
1544 struct nfs_fattr *fattr)
1546 struct nfs_server *server = NFS_SERVER(dir);
1547 struct nfs4_create_arg arg = {
1548 .dir_fh = NFS_FH(dir),
1553 .bitmask = server->attr_bitmask,
1555 struct nfs4_create_res res = {
1560 struct rpc_message msg = {
1561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1569 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1571 update_changeattr(dir, &res.dir_cinfo);
1575 static int nfs4_proc_mkdir(struct inode *dir, struct qstr *name,
1576 struct iattr *sattr, struct nfs_fh *fhandle,
1577 struct nfs_fattr *fattr)
1579 struct nfs4_exception exception = { };
1582 err = nfs4_handle_exception(NFS_SERVER(dir),
1583 _nfs4_proc_mkdir(dir, name, sattr,
1586 } while (exception.retry);
1590 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1591 u64 cookie, struct page *page, unsigned int count, int plus)
1593 struct inode *dir = dentry->d_inode;
1594 struct nfs4_readdir_arg args = {
1600 struct nfs4_readdir_res res;
1601 struct rpc_message msg = {
1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
1610 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
1611 res.pgbase = args.pgbase;
1612 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1614 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
1619 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1620 u64 cookie, struct page *page, unsigned int count, int plus)
1622 struct nfs4_exception exception = { };
1625 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
1626 _nfs4_proc_readdir(dentry, cred, cookie,
1629 } while (exception.retry);
1633 static int _nfs4_proc_mknod(struct inode *dir, struct qstr *name,
1634 struct iattr *sattr, dev_t rdev, struct nfs_fh *fh,
1635 struct nfs_fattr *fattr)
1637 struct nfs_server *server = NFS_SERVER(dir);
1638 struct nfs4_create_arg arg = {
1639 .dir_fh = NFS_FH(dir),
1643 .bitmask = server->attr_bitmask,
1645 struct nfs4_create_res res = {
1650 struct rpc_message msg = {
1651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1656 int mode = sattr->ia_mode;
1660 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
1661 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
1663 arg.ftype = NF4FIFO;
1664 else if (S_ISBLK(mode)) {
1666 arg.u.device.specdata1 = MAJOR(rdev);
1667 arg.u.device.specdata2 = MINOR(rdev);
1669 else if (S_ISCHR(mode)) {
1671 arg.u.device.specdata1 = MAJOR(rdev);
1672 arg.u.device.specdata2 = MINOR(rdev);
1675 arg.ftype = NF4SOCK;
1677 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1679 update_changeattr(dir, &res.dir_cinfo);
1683 static int nfs4_proc_mknod(struct inode *dir, struct qstr *name,
1684 struct iattr *sattr, dev_t rdev, struct nfs_fh *fh,
1685 struct nfs_fattr *fattr)
1687 struct nfs4_exception exception = { };
1690 err = nfs4_handle_exception(NFS_SERVER(dir),
1691 _nfs4_proc_mknod(dir, name, sattr, rdev,
1694 } while (exception.retry);
1698 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
1699 struct nfs_fsstat *fsstat)
1701 struct nfs4_statfs_arg args = {
1703 .bitmask = server->attr_bitmask,
1705 struct rpc_message msg = {
1706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
1711 fsstat->fattr->valid = 0;
1712 return rpc_call_sync(server->client, &msg, 0);
1715 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
1717 struct nfs4_exception exception = { };
1720 err = nfs4_handle_exception(server,
1721 _nfs4_proc_statfs(server, fhandle, fsstat),
1723 } while (exception.retry);
1727 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
1728 struct nfs_fsinfo *fsinfo)
1730 struct nfs4_fsinfo_arg args = {
1732 .bitmask = server->attr_bitmask,
1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
1740 return rpc_call_sync(server->client, &msg, 0);
1743 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1745 struct nfs4_exception exception = { };
1749 err = nfs4_handle_exception(server,
1750 _nfs4_do_fsinfo(server, fhandle, fsinfo),
1752 } while (exception.retry);
1756 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1758 fsinfo->fattr->valid = 0;
1759 return nfs4_do_fsinfo(server, fhandle, fsinfo);
1762 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1763 struct nfs_pathconf *pathconf)
1765 struct nfs4_pathconf_arg args = {
1767 .bitmask = server->attr_bitmask,
1769 struct rpc_message msg = {
1770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
1772 .rpc_resp = pathconf,
1775 /* None of the pathconf attributes are mandatory to implement */
1776 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
1777 memset(pathconf, 0, sizeof(*pathconf));
1781 pathconf->fattr->valid = 0;
1782 return rpc_call_sync(server->client, &msg, 0);
1785 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1786 struct nfs_pathconf *pathconf)
1788 struct nfs4_exception exception = { };
1792 err = nfs4_handle_exception(server,
1793 _nfs4_proc_pathconf(server, fhandle, pathconf),
1795 } while (exception.retry);
1800 nfs4_read_done(struct rpc_task *task)
1802 struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
1803 struct inode *inode = data->inode;
1805 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1806 rpc_restart_call(task);
1809 if (task->tk_status > 0)
1810 renew_lease(NFS_SERVER(inode), data->timestamp);
1811 /* Call back common NFS readpage processing */
1812 nfs_readpage_result(task);
1816 nfs4_proc_read_setup(struct nfs_read_data *data)
1818 struct rpc_task *task = &data->task;
1819 struct rpc_message msg = {
1820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1821 .rpc_argp = &data->args,
1822 .rpc_resp = &data->res,
1823 .rpc_cred = data->cred,
1825 struct inode *inode = data->inode;
1828 data->timestamp = jiffies;
1830 /* N.B. Do we need to test? Never called for swapfile inode */
1831 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
1833 /* Finalize the task. */
1834 rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
1835 rpc_call_setup(task, &msg, 0);
1839 nfs4_write_done(struct rpc_task *task)
1841 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
1842 struct inode *inode = data->inode;
1844 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1845 rpc_restart_call(task);
1848 if (task->tk_status >= 0)
1849 renew_lease(NFS_SERVER(inode), data->timestamp);
1850 /* Call back common NFS writeback processing */
1851 nfs_writeback_done(task);
1855 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1857 struct rpc_task *task = &data->task;
1858 struct rpc_message msg = {
1859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1860 .rpc_argp = &data->args,
1861 .rpc_resp = &data->res,
1862 .rpc_cred = data->cred,
1864 struct inode *inode = data->inode;
1868 if (how & FLUSH_STABLE) {
1869 if (!NFS_I(inode)->ncommit)
1870 stable = NFS_FILE_SYNC;
1872 stable = NFS_DATA_SYNC;
1874 stable = NFS_UNSTABLE;
1875 data->args.stable = stable;
1877 data->timestamp = jiffies;
1879 /* Set the initial flags for the task. */
1880 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
1882 /* Finalize the task. */
1883 rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
1884 rpc_call_setup(task, &msg, 0);
1888 nfs4_commit_done(struct rpc_task *task)
1890 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
1891 struct inode *inode = data->inode;
1893 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1894 rpc_restart_call(task);
1897 /* Call back common NFS writeback processing */
1898 nfs_commit_done(task);
1902 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1904 struct rpc_task *task = &data->task;
1905 struct rpc_message msg = {
1906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1907 .rpc_argp = &data->args,
1908 .rpc_resp = &data->res,
1909 .rpc_cred = data->cred,
1911 struct inode *inode = data->inode;
1914 /* Set the initial flags for the task. */
1915 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
1917 /* Finalize the task. */
1918 rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
1919 rpc_call_setup(task, &msg, 0);
1923 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
1924 * standalone procedure for queueing an asynchronous RENEW.
1927 renew_done(struct rpc_task *task)
1929 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
1930 unsigned long timestamp = (unsigned long)task->tk_calldata;
1932 if (task->tk_status < 0) {
1933 switch (task->tk_status) {
1934 case -NFS4ERR_STALE_CLIENTID:
1935 case -NFS4ERR_EXPIRED:
1936 case -NFS4ERR_CB_PATH_DOWN:
1937 nfs4_schedule_state_recovery(clp);
1941 spin_lock(&clp->cl_lock);
1942 if (time_before(clp->cl_last_renewal,timestamp))
1943 clp->cl_last_renewal = timestamp;
1944 spin_unlock(&clp->cl_lock);
1948 nfs4_proc_async_renew(struct nfs4_client *clp)
1950 struct rpc_message msg = {
1951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
1953 .rpc_cred = clp->cl_cred,
1956 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
1957 renew_done, (void *)jiffies);
1961 nfs4_proc_renew(struct nfs4_client *clp)
1963 struct rpc_message msg = {
1964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
1966 .rpc_cred = clp->cl_cred,
1968 unsigned long now = jiffies;
1971 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
1974 spin_lock(&clp->cl_lock);
1975 if (time_before(clp->cl_last_renewal,now))
1976 clp->cl_last_renewal = now;
1977 spin_unlock(&clp->cl_lock);
1982 * We will need to arrange for the VFS layer to provide an atomic open.
1983 * Until then, this open method is prone to inefficiency and race conditions
1984 * due to the lookup, potential create, and open VFS calls from sys_open()
1985 * placed on the wire.
1988 nfs4_proc_file_open(struct inode *inode, struct file *filp)
1990 struct dentry *dentry = filp->f_dentry;
1991 struct nfs_open_context *ctx;
1992 struct nfs4_state *state = NULL;
1993 struct rpc_cred *cred;
1994 int status = -ENOMEM;
1996 dprintk("nfs4_proc_file_open: starting on (%.*s/%.*s)\n",
1997 (int)dentry->d_parent->d_name.len,
1998 dentry->d_parent->d_name.name,
1999 (int)dentry->d_name.len, dentry->d_name.name);
2002 /* Find our open stateid */
2003 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
2004 if (unlikely(cred == NULL))
2006 ctx = alloc_nfs_open_context(dentry, cred);
2008 if (unlikely(ctx == NULL))
2010 status = -EIO; /* ERACE actually */
2011 state = nfs4_find_state(inode, cred, filp->f_mode);
2012 if (unlikely(state == NULL))
2015 nfs4_close_state(state, filp->f_mode);
2016 ctx->mode = filp->f_mode;
2017 nfs_file_set_open_context(filp, ctx);
2018 put_nfs_open_context(ctx);
2019 if (filp->f_mode & FMODE_WRITE)
2020 nfs_begin_data_update(inode);
2023 printk(KERN_WARNING "NFS: v4 raced in function %s\n", __FUNCTION__);
2024 put_nfs_open_context(ctx);
2032 nfs4_proc_file_release(struct inode *inode, struct file *filp)
2034 if (filp->f_mode & FMODE_WRITE)
2035 nfs_end_data_update(inode);
2036 nfs_file_clear_open_context(filp);
2041 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server)
2043 struct nfs4_client *clp = server->nfs4_state;
2045 if (!clp || task->tk_status >= 0)
2047 switch(task->tk_status) {
2048 case -NFS4ERR_STALE_CLIENTID:
2049 case -NFS4ERR_STALE_STATEID:
2050 case -NFS4ERR_EXPIRED:
2051 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2052 nfs4_schedule_state_recovery(clp);
2053 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2054 rpc_wake_up_task(task);
2055 task->tk_status = 0;
2057 case -NFS4ERR_GRACE:
2058 case -NFS4ERR_DELAY:
2059 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2060 task->tk_status = 0;
2062 case -NFS4ERR_OLD_STATEID:
2063 task->tk_status = 0;
2066 task->tk_status = nfs4_map_errors(task->tk_status);
2070 int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2074 int interruptible, res = 0;
2078 rpc_clnt_sigmask(clnt, &oldset);
2079 interruptible = TASK_UNINTERRUPTIBLE;
2081 interruptible = TASK_INTERRUPTIBLE;
2082 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2083 nfs4_schedule_state_recovery(clp);
2084 if (clnt->cl_intr && signalled())
2086 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2088 finish_wait(&clp->cl_waitq, &wait);
2089 rpc_clnt_sigunmask(clnt, &oldset);
2093 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2101 *timeout = NFS4_POLL_RETRY_MIN;
2102 if (*timeout > NFS4_POLL_RETRY_MAX)
2103 *timeout = NFS4_POLL_RETRY_MAX;
2104 rpc_clnt_sigmask(clnt, &oldset);
2105 if (clnt->cl_intr) {
2106 set_current_state(TASK_INTERRUPTIBLE);
2107 schedule_timeout(*timeout);
2111 set_current_state(TASK_UNINTERRUPTIBLE);
2112 schedule_timeout(*timeout);
2114 rpc_clnt_sigunmask(clnt, &oldset);
2119 /* This is the error handling routine for processes that are allowed
2122 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2124 struct nfs4_client *clp = server->nfs4_state;
2125 int ret = errorcode;
2127 exception->retry = 0;
2131 case -NFS4ERR_STALE_CLIENTID:
2132 case -NFS4ERR_STALE_STATEID:
2133 case -NFS4ERR_EXPIRED:
2134 ret = nfs4_wait_clnt_recover(server->client, clp);
2136 exception->retry = 1;
2138 case -NFS4ERR_GRACE:
2139 case -NFS4ERR_DELAY:
2140 ret = nfs4_delay(server->client, &exception->timeout);
2142 exception->retry = 1;
2144 case -NFS4ERR_OLD_STATEID:
2146 exception->retry = 1;
2148 /* We failed to handle the error */
2149 return nfs4_map_errors(ret);
2152 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2154 static nfs4_verifier sc_verifier;
2155 static int initialized;
2157 struct nfs4_setclientid setclientid = {
2158 .sc_verifier = &sc_verifier,
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2163 .rpc_argp = &setclientid,
2165 .rpc_cred = clp->cl_cred,
2169 struct timespec boot_time;
2173 boot_time = CURRENT_TIME;
2174 p = (u32*)sc_verifier.data;
2175 *p++ = htonl((u32)boot_time.tv_sec);
2176 *p = htonl((u32)boot_time.tv_nsec);
2178 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2179 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u",
2180 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr));
2181 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2182 sizeof(setclientid.sc_netid), "tcp");
2183 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2184 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2185 clp->cl_ipaddr, port >> 8, port & 255);
2187 return rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2191 nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2193 struct nfs_fsinfo fsinfo;
2194 struct rpc_message msg = {
2195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2197 .rpc_resp = &fsinfo,
2198 .rpc_cred = clp->cl_cred,
2204 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2206 spin_lock(&clp->cl_lock);
2207 clp->cl_lease_time = fsinfo.lease_time * HZ;
2208 clp->cl_last_renewal = now;
2209 spin_unlock(&clp->cl_lock);
2214 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2216 struct nfs4_delegreturnargs args = {
2217 .fhandle = NFS_FH(inode),
2220 struct rpc_message msg = {
2221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2226 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2229 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2231 struct nfs_server *server = NFS_SERVER(inode);
2232 struct nfs4_exception exception = { };
2235 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2237 case -NFS4ERR_STALE_STATEID:
2238 case -NFS4ERR_EXPIRED:
2239 nfs4_schedule_state_recovery(server->nfs4_state);
2243 err = nfs4_handle_exception(server, err, &exception);
2244 } while (exception.retry);
2248 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2249 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2252 * sleep, with exponential backoff, and retry the LOCK operation.
2254 static unsigned long
2255 nfs4_set_lock_task_retry(unsigned long timeout)
2257 current->state = TASK_INTERRUPTIBLE;
2258 schedule_timeout(timeout);
2260 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2261 return NFS4_LOCK_MAXTIMEOUT;
2266 nfs4_lck_type(int cmd, struct file_lock *request)
2269 switch (request->fl_type) {
2271 return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
2273 return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
2275 return NFS4_WRITE_LT;
2281 static inline uint64_t
2282 nfs4_lck_length(struct file_lock *request)
2284 if (request->fl_end == OFFSET_MAX)
2285 return ~(uint64_t)0;
2286 return request->fl_end - request->fl_start + 1;
2289 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2291 struct inode *inode = state->inode;
2292 struct nfs_server *server = NFS_SERVER(inode);
2293 struct nfs4_client *clp = server->nfs4_state;
2294 struct nfs_lockargs arg = {
2295 .fh = NFS_FH(inode),
2296 .type = nfs4_lck_type(cmd, request),
2297 .offset = request->fl_start,
2298 .length = nfs4_lck_length(request),
2300 struct nfs_lockres res = {
2303 struct rpc_message msg = {
2304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2307 .rpc_cred = state->owner->so_cred,
2309 struct nfs_lowner nlo;
2310 struct nfs4_lock_state *lsp;
2313 down_read(&clp->cl_sem);
2314 nlo.clientid = clp->cl_clientid;
2315 down(&state->lock_sema);
2316 lsp = nfs4_find_lock_state(state, request->fl_owner);
2318 nlo.id = lsp->ls_id;
2320 spin_lock(&clp->cl_lock);
2321 nlo.id = nfs4_alloc_lockowner_id(clp);
2322 spin_unlock(&clp->cl_lock);
2325 status = rpc_call_sync(server->client, &msg, 0);
2327 request->fl_type = F_UNLCK;
2328 } else if (status == -NFS4ERR_DENIED) {
2329 int64_t len, start, end;
2330 start = res.u.denied.offset;
2331 len = res.u.denied.length;
2332 end = start + len - 1;
2333 if (end < 0 || len == 0)
2334 request->fl_end = OFFSET_MAX;
2336 request->fl_end = (loff_t)end;
2337 request->fl_start = (loff_t)start;
2338 request->fl_type = F_WRLCK;
2339 if (res.u.denied.type & 1)
2340 request->fl_type = F_RDLCK;
2341 request->fl_pid = 0;
2345 nfs4_put_lock_state(lsp);
2346 up(&state->lock_sema);
2347 up_read(&clp->cl_sem);
2351 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2353 struct nfs4_exception exception = { };
2357 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2358 _nfs4_proc_getlk(state, cmd, request),
2360 } while (exception.retry);
2364 static int _nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2366 struct inode *inode = state->inode;
2367 struct nfs_server *server = NFS_SERVER(inode);
2368 struct nfs4_client *clp = server->nfs4_state;
2369 struct nfs_lockargs arg = {
2370 .fh = NFS_FH(inode),
2371 .type = nfs4_lck_type(cmd, request),
2372 .offset = request->fl_start,
2373 .length = nfs4_lck_length(request),
2375 struct nfs_lockres res = {
2378 struct rpc_message msg = {
2379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
2382 .rpc_cred = state->owner->so_cred,
2384 struct nfs4_lock_state *lsp;
2385 struct nfs_locku_opargs luargs;
2388 down_read(&clp->cl_sem);
2389 down(&state->lock_sema);
2390 lsp = nfs4_find_lock_state(state, request->fl_owner);
2393 /* We might have lost the locks! */
2394 if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) {
2395 luargs.seqid = lsp->ls_seqid;
2396 memcpy(&luargs.stateid, &lsp->ls_stateid, sizeof(luargs.stateid));
2397 arg.u.locku = &luargs;
2398 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2399 nfs4_increment_lock_seqid(status, lsp);
2403 memcpy(&lsp->ls_stateid, &res.u.stateid,
2404 sizeof(lsp->ls_stateid));
2405 nfs4_notify_unlck(state, request, lsp);
2407 nfs4_put_lock_state(lsp);
2409 up(&state->lock_sema);
2411 posix_lock_file(request->fl_file, request);
2412 up_read(&clp->cl_sem);
2416 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2418 struct nfs4_exception exception = { };
2422 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2423 _nfs4_proc_unlck(state, cmd, request),
2425 } while (exception.retry);
2429 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
2431 struct inode *inode = state->inode;
2432 struct nfs_server *server = NFS_SERVER(inode);
2433 struct nfs4_lock_state *lsp;
2434 struct nfs_lockargs arg = {
2435 .fh = NFS_FH(inode),
2436 .type = nfs4_lck_type(cmd, request),
2437 .offset = request->fl_start,
2438 .length = nfs4_lck_length(request),
2440 struct nfs_lockres res = {
2443 struct rpc_message msg = {
2444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
2447 .rpc_cred = state->owner->so_cred,
2449 struct nfs_lock_opargs largs = {
2451 .new_lock_owner = 0,
2455 lsp = nfs4_get_lock_state(state, request->fl_owner);
2458 if (!(lsp->ls_flags & NFS_LOCK_INITIALIZED)) {
2459 struct nfs4_state_owner *owner = state->owner;
2460 struct nfs_open_to_lock otl = {
2462 .clientid = server->nfs4_state->cl_clientid,
2466 otl.lock_seqid = lsp->ls_seqid;
2467 otl.lock_owner.id = lsp->ls_id;
2468 memcpy(&otl.open_stateid, &state->stateid, sizeof(otl.open_stateid));
2469 largs.u.open_lock = &otl;
2470 largs.new_lock_owner = 1;
2471 arg.u.lock = &largs;
2472 down(&owner->so_sema);
2473 otl.open_seqid = owner->so_seqid;
2474 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2475 /* increment open_owner seqid on success, and
2476 * seqid mutating errors */
2477 nfs4_increment_seqid(status, owner);
2478 up(&owner->so_sema);
2480 struct nfs_exist_lock el = {
2481 .seqid = lsp->ls_seqid,
2483 memcpy(&el.stateid, &lsp->ls_stateid, sizeof(el.stateid));
2484 largs.u.exist_lock = ⪙
2485 largs.new_lock_owner = 0;
2486 arg.u.lock = &largs;
2487 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2489 /* increment seqid on success, and * seqid mutating errors*/
2490 nfs4_increment_lock_seqid(status, lsp);
2491 /* save the returned stateid. */
2493 memcpy(&lsp->ls_stateid, &res.u.stateid, sizeof(nfs4_stateid));
2494 lsp->ls_flags |= NFS_LOCK_INITIALIZED;
2496 nfs4_notify_setlk(state, request, lsp);
2497 } else if (status == -NFS4ERR_DENIED)
2499 nfs4_put_lock_state(lsp);
2503 int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
2505 return _nfs4_do_setlk(state, F_SETLK, request, 1);
2508 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2510 struct nfs4_client *clp = state->owner->so_client;
2513 down_read(&clp->cl_sem);
2514 down(&state->lock_sema);
2515 status = _nfs4_do_setlk(state, cmd, request, 0);
2516 up(&state->lock_sema);
2518 /* Note: we always want to sleep here! */
2519 request->fl_flags |= FL_SLEEP;
2520 if (posix_lock_file_wait(request->fl_file, request) < 0)
2521 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
2523 up_read(&clp->cl_sem);
2527 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2529 struct nfs4_exception exception = { };
2533 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2534 _nfs4_proc_setlk(state, cmd, request),
2536 } while (exception.retry);
2541 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
2543 struct nfs_open_context *ctx;
2544 struct nfs4_state *state;
2545 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
2548 /* verify open state */
2549 ctx = (struct nfs_open_context *)filp->private_data;
2552 if (request->fl_start < 0 || request->fl_end < 0)
2556 return nfs4_proc_getlk(state, F_GETLK, request);
2558 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
2561 if (request->fl_type == F_UNLCK)
2562 return nfs4_proc_unlck(state, cmd, request);
2565 status = nfs4_proc_setlk(state, cmd, request);
2566 if ((status != -EAGAIN) || IS_SETLK(cmd))
2568 timeout = nfs4_set_lock_task_retry(timeout);
2569 status = -ERESTARTSYS;
2572 } while(status < 0);
2577 struct nfs_rpc_ops nfs_v4_clientops = {
2578 .version = 4, /* protocol version */
2579 .dentry_ops = &nfs4_dentry_operations,
2580 .dir_inode_ops = &nfs4_dir_inode_operations,
2581 .getroot = nfs4_proc_get_root,
2582 .getattr = nfs4_proc_getattr,
2583 .setattr = nfs4_proc_setattr,
2584 .lookup = nfs4_proc_lookup,
2585 .access = nfs4_proc_access,
2586 .readlink = nfs4_proc_readlink,
2587 .read = nfs4_proc_read,
2588 .write = nfs4_proc_write,
2589 .commit = nfs4_proc_commit,
2590 .create = nfs4_proc_create,
2591 .remove = nfs4_proc_remove,
2592 .unlink_setup = nfs4_proc_unlink_setup,
2593 .unlink_done = nfs4_proc_unlink_done,
2594 .rename = nfs4_proc_rename,
2595 .link = nfs4_proc_link,
2596 .symlink = nfs4_proc_symlink,
2597 .mkdir = nfs4_proc_mkdir,
2598 .rmdir = nfs4_proc_remove,
2599 .readdir = nfs4_proc_readdir,
2600 .mknod = nfs4_proc_mknod,
2601 .statfs = nfs4_proc_statfs,
2602 .fsinfo = nfs4_proc_fsinfo,
2603 .pathconf = nfs4_proc_pathconf,
2604 .decode_dirent = nfs4_decode_dirent,
2605 .read_setup = nfs4_proc_read_setup,
2606 .write_setup = nfs4_proc_write_setup,
2607 .commit_setup = nfs4_proc_commit_setup,
2608 .file_open = nfs4_proc_file_open,
2609 .file_release = nfs4_proc_file_release,
2610 .lock = nfs4_proc_lock,