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/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
52 #include "delegation.h"
54 #define NFSDBG_FACILITY NFSDBG_PROC
56 #define NFS4_POLL_RETRY_MIN (1*HZ)
57 #define NFS4_POLL_RETRY_MAX (15*HZ)
59 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
60 static int nfs4_async_handle_error(struct rpc_task *, struct nfs_server *);
61 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
62 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
63 extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
64 extern struct rpc_procinfo nfs4_procedures[];
66 /* Prevent leaks of NFSv4 errors into userland */
67 int nfs4_map_errors(int err)
70 dprintk("%s could not handle NFSv4 error %d\n",
78 * This is our standard bitmap for GETATTR requests.
80 const u32 nfs4_fattr_bitmap[2] = {
85 | FATTR4_WORD0_FILEID,
87 | FATTR4_WORD1_NUMLINKS
89 | FATTR4_WORD1_OWNER_GROUP
91 | FATTR4_WORD1_SPACE_USED
92 | FATTR4_WORD1_TIME_ACCESS
93 | FATTR4_WORD1_TIME_METADATA
94 | FATTR4_WORD1_TIME_MODIFY
97 const u32 nfs4_statfs_bitmap[2] = {
98 FATTR4_WORD0_FILES_AVAIL
99 | FATTR4_WORD0_FILES_FREE
100 | FATTR4_WORD0_FILES_TOTAL,
101 FATTR4_WORD1_SPACE_AVAIL
102 | FATTR4_WORD1_SPACE_FREE
103 | FATTR4_WORD1_SPACE_TOTAL
106 const u32 nfs4_pathconf_bitmap[2] = {
108 | FATTR4_WORD0_MAXNAME,
112 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
113 | FATTR4_WORD0_MAXREAD
114 | FATTR4_WORD0_MAXWRITE
115 | FATTR4_WORD0_LEASE_TIME,
119 static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
120 struct nfs4_readdir_arg *readdir)
124 BUG_ON(readdir->count < 80);
126 readdir->cookie = (cookie > 2) ? cookie : 0;
127 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
132 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
137 * NFSv4 servers do not return entries for '.' and '..'
138 * Therefore, we fake these entries here. We let '.'
139 * have cookie 0 and '..' have cookie 1. Note that
140 * when talking to the server, we always send cookie 0
143 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
146 *p++ = xdr_one; /* next */
147 *p++ = xdr_zero; /* cookie, first word */
148 *p++ = xdr_one; /* cookie, second word */
149 *p++ = xdr_one; /* entry len */
150 memcpy(p, ".\0\0\0", 4); /* entry */
152 *p++ = xdr_one; /* bitmap length */
153 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
154 *p++ = htonl(8); /* attribute buffer length */
155 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
158 *p++ = xdr_one; /* next */
159 *p++ = xdr_zero; /* cookie, first word */
160 *p++ = xdr_two; /* cookie, second word */
161 *p++ = xdr_two; /* entry len */
162 memcpy(p, "..\0\0", 4); /* entry */
164 *p++ = xdr_one; /* bitmap length */
165 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
166 *p++ = htonl(8); /* attribute buffer length */
167 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
169 readdir->pgbase = (char *)p - (char *)start;
170 readdir->count -= readdir->pgbase;
171 kunmap_atomic(start, KM_USER0);
175 renew_lease(struct nfs_server *server, unsigned long timestamp)
177 struct nfs4_client *clp = server->nfs4_state;
178 spin_lock(&clp->cl_lock);
179 if (time_before(clp->cl_last_renewal,timestamp))
180 clp->cl_last_renewal = timestamp;
181 spin_unlock(&clp->cl_lock);
184 static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
186 struct nfs_inode *nfsi = NFS_I(inode);
188 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
189 nfsi->change_attr = cinfo->after;
192 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
194 struct inode *inode = state->inode;
196 open_flags &= (FMODE_READ|FMODE_WRITE);
197 /* Protect against nfs4_find_state() */
198 spin_lock(&inode->i_lock);
199 state->state |= open_flags;
200 /* NB! List reordering - see the reclaim code for why. */
201 if ((open_flags & FMODE_WRITE) && 0 == state->nwriters++)
202 list_move(&state->open_states, &state->owner->so_states);
203 if (open_flags & FMODE_READ)
205 memcpy(&state->stateid, stateid, sizeof(state->stateid));
206 spin_unlock(&inode->i_lock);
211 * reclaim state on the server after a reboot.
212 * Assumes caller is holding the sp->so_sem
214 static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
216 struct inode *inode = state->inode;
217 struct nfs_server *server = NFS_SERVER(inode);
218 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
219 struct nfs_openargs o_arg = {
221 .seqid = sp->so_seqid,
223 .open_flags = state->state,
224 .clientid = server->nfs4_state->cl_clientid,
225 .claim = NFS4_OPEN_CLAIM_PREVIOUS,
226 .bitmask = server->attr_bitmask,
228 struct nfs_openres o_res = {
229 .server = server, /* Grrr */
231 struct rpc_message msg = {
232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
235 .rpc_cred = sp->so_cred,
239 if (delegation != NULL) {
240 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
241 memcpy(&state->stateid, &delegation->stateid,
242 sizeof(state->stateid));
243 set_bit(NFS_DELEGATED_STATE, &state->flags);
246 o_arg.u.delegation_type = delegation->type;
248 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
249 nfs4_increment_seqid(status, sp);
251 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
252 if (o_res.delegation_type != 0) {
253 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
254 /* Did the server issue an immediate delegation recall? */
256 nfs_async_inode_return_delegation(inode, &o_res.stateid);
259 clear_bit(NFS_DELEGATED_STATE, &state->flags);
260 /* Ensure we update the inode attributes */
265 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
267 struct nfs_server *server = NFS_SERVER(state->inode);
268 struct nfs4_exception exception = { };
271 err = _nfs4_open_reclaim(sp, state);
274 case -NFS4ERR_STALE_CLIENTID:
275 case -NFS4ERR_STALE_STATEID:
276 case -NFS4ERR_EXPIRED:
279 err = nfs4_handle_exception(server, err, &exception);
280 } while (exception.retry);
284 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
286 struct nfs4_state_owner *sp = state->owner;
287 struct inode *inode = dentry->d_inode;
288 struct nfs_server *server = NFS_SERVER(inode);
289 struct dentry *parent = dget_parent(dentry);
290 struct nfs_openargs arg = {
291 .fh = NFS_FH(parent->d_inode),
292 .clientid = server->nfs4_state->cl_clientid,
293 .name = &dentry->d_name,
296 .bitmask = server->attr_bitmask,
297 .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
299 struct nfs_openres res = {
302 struct rpc_message msg = {
303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
306 .rpc_cred = sp->so_cred,
311 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
313 if (state->state == 0)
315 arg.seqid = sp->so_seqid;
316 arg.open_flags = state->state;
317 memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
318 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
319 nfs4_increment_seqid(status, sp);
321 memcpy(state->stateid.data, res.stateid.data,
322 sizeof(state->stateid.data));
323 clear_bit(NFS_DELEGATED_STATE, &state->flags);
331 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
333 struct nfs4_exception exception = { };
334 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
337 err = _nfs4_open_delegation_recall(dentry, state);
341 case -NFS4ERR_STALE_CLIENTID:
342 case -NFS4ERR_STALE_STATEID:
343 case -NFS4ERR_EXPIRED:
344 /* Don't recall a delegation if it was lost */
345 nfs4_schedule_state_recovery(server->nfs4_state);
348 err = nfs4_handle_exception(server, err, &exception);
349 } while (exception.retry);
353 static inline int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid)
355 struct nfs_open_confirmargs arg = {
357 .seqid = sp->so_seqid,
360 struct nfs_open_confirmres res;
361 struct rpc_message msg = {
362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
365 .rpc_cred = sp->so_cred,
369 status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
370 nfs4_increment_seqid(status, sp);
372 memcpy(stateid, &res.stateid, sizeof(*stateid));
376 static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res)
378 struct nfs_server *server = NFS_SERVER(dir);
379 struct rpc_message msg = {
380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
383 .rpc_cred = sp->so_cred,
387 /* Update sequence id. The caller must serialize! */
388 o_arg->seqid = sp->so_seqid;
389 o_arg->id = sp->so_id;
390 o_arg->clientid = sp->so_client->cl_clientid;
392 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
393 nfs4_increment_seqid(status, sp);
396 update_changeattr(dir, &o_res->cinfo);
397 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
398 status = _nfs4_proc_open_confirm(server->client, &o_res->fh,
399 sp, &o_res->stateid);
403 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
404 status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
409 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
411 struct nfs_access_entry cache;
415 if (openflags & FMODE_READ)
417 if (openflags & FMODE_WRITE)
419 status = nfs_access_get_cached(inode, cred, &cache);
423 /* Be clever: ask server to check for all possible rights */
424 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
426 cache.jiffies = jiffies;
427 status = _nfs4_proc_access(inode, &cache);
430 nfs_access_add_cache(inode, &cache);
432 if ((cache.mask & mask) == mask)
439 * reclaim state on the server after a network partition.
440 * Assumes caller holds the appropriate lock
442 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
444 struct dentry *parent = dget_parent(dentry);
445 struct inode *dir = parent->d_inode;
446 struct inode *inode = state->inode;
447 struct nfs_server *server = NFS_SERVER(dir);
448 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
449 struct nfs_fattr f_attr = {
452 struct nfs_openargs o_arg = {
454 .open_flags = state->state,
455 .name = &dentry->d_name,
456 .bitmask = server->attr_bitmask,
457 .claim = NFS4_OPEN_CLAIM_NULL,
459 struct nfs_openres o_res = {
465 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
466 status = _nfs4_do_access(inode, sp->so_cred, state->state);
469 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
470 set_bit(NFS_DELEGATED_STATE, &state->flags);
473 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
476 /* Check if files differ */
477 if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
479 /* Has the file handle changed? */
480 if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) {
481 /* Verify if the change attributes are the same */
482 if (f_attr.change_attr != NFS_I(inode)->change_attr)
484 if (nfs_size_to_loff_t(f_attr.size) != inode->i_size)
486 /* Lets just pretend that this is the same file */
487 nfs_copy_fh(NFS_FH(inode), &o_res.fh);
488 NFS_I(inode)->fileid = f_attr.fileid;
490 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
491 if (o_res.delegation_type != 0) {
492 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
493 nfs_inode_set_delegation(inode, sp->so_cred, &o_res);
495 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
498 clear_bit(NFS_DELEGATED_STATE, &state->flags);
504 /* Invalidate the state owner so we don't ever use it again */
505 nfs4_drop_state_owner(sp);
507 /* Should we be trying to close that stateid? */
511 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
513 struct nfs_inode *nfsi = NFS_I(state->inode);
514 struct nfs_open_context *ctx;
517 spin_lock(&state->inode->i_lock);
518 list_for_each_entry(ctx, &nfsi->open_files, list) {
519 if (ctx->state != state)
521 get_nfs_open_context(ctx);
522 spin_unlock(&state->inode->i_lock);
523 status = _nfs4_open_expired(sp, state, ctx->dentry);
524 put_nfs_open_context(ctx);
527 spin_unlock(&state->inode->i_lock);
532 * Returns an nfs4_state + an extra reference to the inode
534 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
536 struct nfs_delegation *delegation;
537 struct nfs_server *server = NFS_SERVER(inode);
538 struct nfs4_client *clp = server->nfs4_state;
539 struct nfs_inode *nfsi = NFS_I(inode);
540 struct nfs4_state_owner *sp = NULL;
541 struct nfs4_state *state = NULL;
542 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
545 /* Protect against reboot recovery - NOTE ORDER! */
546 down_read(&clp->cl_sem);
547 /* Protect against delegation recall */
548 down_read(&nfsi->rwsem);
549 delegation = NFS_I(inode)->delegation;
551 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
554 if (!(sp = nfs4_get_state_owner(server, cred))) {
555 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
559 state = nfs4_get_open_state(inode, sp);
564 if ((state->state & open_flags) == open_flags) {
565 spin_lock(&inode->i_lock);
566 if (open_flags & FMODE_READ)
568 if (open_flags & FMODE_WRITE)
570 spin_unlock(&inode->i_lock);
572 } else if (state->state != 0)
576 err = _nfs4_do_access(inode, cred, open_flags);
580 set_bit(NFS_DELEGATED_STATE, &state->flags);
581 update_open_stateid(state, &delegation->stateid, open_flags);
584 nfs4_put_state_owner(sp);
585 up_read(&nfsi->rwsem);
586 up_read(&clp->cl_sem);
593 nfs4_put_open_state(state);
595 nfs4_put_state_owner(sp);
597 up_read(&nfsi->rwsem);
598 up_read(&clp->cl_sem);
602 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
604 struct nfs4_exception exception = { };
605 struct nfs4_state *res;
609 err = _nfs4_open_delegated(inode, flags, cred, &res);
612 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
614 } while (exception.retry);
619 * Returns an nfs4_state + an referenced inode
621 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
623 struct nfs4_state_owner *sp;
624 struct nfs4_state *state = NULL;
625 struct nfs_server *server = NFS_SERVER(dir);
626 struct nfs4_client *clp = server->nfs4_state;
627 struct inode *inode = NULL;
629 struct nfs_fattr f_attr = {
632 struct nfs_openargs o_arg = {
635 .name = &dentry->d_name,
637 .bitmask = server->attr_bitmask,
638 .claim = NFS4_OPEN_CLAIM_NULL,
640 struct nfs_openres o_res = {
645 /* Protect against reboot recovery conflicts */
646 down_read(&clp->cl_sem);
648 if (!(sp = nfs4_get_state_owner(server, cred))) {
649 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
652 if (flags & O_EXCL) {
653 u32 *p = (u32 *) o_arg.u.verifier.data;
657 o_arg.u.attrs = sattr;
658 /* Serialization for the sequence id */
661 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
666 inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
669 state = nfs4_get_open_state(inode, sp);
672 update_open_stateid(state, &o_res.stateid, flags);
673 if (o_res.delegation_type != 0)
674 nfs_inode_set_delegation(inode, cred, &o_res);
676 nfs4_put_state_owner(sp);
677 up_read(&clp->cl_sem);
683 nfs4_put_open_state(state);
685 nfs4_put_state_owner(sp);
687 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
688 up_read(&clp->cl_sem);
696 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
698 struct nfs4_exception exception = { };
699 struct nfs4_state *res;
703 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
706 /* NOTE: BAD_SEQID means the server and client disagree about the
707 * book-keeping w.r.t. state-changing operations
708 * (OPEN/CLOSE/LOCK/LOCKU...)
709 * It is actually a sign of a bug on the client or on the server.
711 * If we receive a BAD_SEQID error in the particular case of
712 * doing an OPEN, we assume that nfs4_increment_seqid() will
713 * have unhashed the old state_owner for us, and that we can
714 * therefore safely retry using a new one. We should still warn
717 if (status == -NFS4ERR_BAD_SEQID) {
718 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
722 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
723 status, &exception));
724 } while (exception.retry);
728 static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
729 struct nfs_fh *fhandle, struct iattr *sattr,
730 struct nfs4_state *state)
732 struct nfs_setattrargs arg = {
736 .bitmask = server->attr_bitmask,
738 struct nfs_setattrres res = {
742 struct rpc_message msg = {
743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
751 msg.rpc_cred = state->owner->so_cred;
752 if (sattr->ia_valid & ATTR_SIZE)
753 nfs4_copy_stateid(&arg.stateid, state, NULL);
755 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
757 return rpc_call_sync(server->client, &msg, 0);
760 static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
761 struct nfs_fh *fhandle, struct iattr *sattr,
762 struct nfs4_state *state)
764 struct nfs4_exception exception = { };
767 err = nfs4_handle_exception(server,
768 _nfs4_do_setattr(server, fattr, fhandle, sattr,
771 } while (exception.retry);
775 struct nfs4_closedata {
777 struct nfs4_state *state;
778 struct nfs_closeargs arg;
779 struct nfs_closeres res;
782 static void nfs4_close_done(struct rpc_task *task)
784 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
785 struct nfs4_state *state = calldata->state;
786 struct nfs4_state_owner *sp = state->owner;
787 struct nfs_server *server = NFS_SERVER(calldata->inode);
789 /* hmm. we are done with the inode, and in the process of freeing
790 * the state_owner. we keep this around to process errors
792 nfs4_increment_seqid(task->tk_status, sp);
793 switch (task->tk_status) {
795 memcpy(&state->stateid, &calldata->res.stateid,
796 sizeof(state->stateid));
798 case -NFS4ERR_STALE_STATEID:
799 case -NFS4ERR_EXPIRED:
800 state->state = calldata->arg.open_flags;
801 nfs4_schedule_state_recovery(server->nfs4_state);
804 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
805 rpc_restart_call(task);
809 state->state = calldata->arg.open_flags;
810 nfs4_put_open_state(state);
812 nfs4_put_state_owner(sp);
813 up_read(&server->nfs4_state->cl_sem);
817 static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *calldata)
819 struct rpc_message msg = {
820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
821 .rpc_argp = &calldata->arg,
822 .rpc_resp = &calldata->res,
823 .rpc_cred = calldata->state->owner->so_cred,
825 if (calldata->arg.open_flags != 0)
826 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
827 return rpc_call_async(clnt, &msg, 0, nfs4_close_done, calldata);
831 * It is possible for data to be read/written from a mem-mapped file
832 * after the sys_close call (which hits the vfs layer as a flush).
833 * This means that we can't safely call nfsv4 close on a file until
834 * the inode is cleared. This in turn means that we are not good
835 * NFSv4 citizens - we do not indicate to the server to update the file's
836 * share state even when we are done with one of the three share
837 * stateid's in the inode.
839 * NOTE: Caller must be holding the sp->so_owner semaphore!
841 int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
843 struct nfs4_closedata *calldata;
846 /* Tell caller we're done */
847 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
851 calldata = (struct nfs4_closedata *)kmalloc(sizeof(*calldata), GFP_KERNEL);
852 if (calldata == NULL)
854 calldata->inode = inode;
855 calldata->state = state;
856 calldata->arg.fh = NFS_FH(inode);
857 /* Serialization for the sequence id */
858 calldata->arg.seqid = state->owner->so_seqid;
859 calldata->arg.open_flags = mode;
860 memcpy(&calldata->arg.stateid, &state->stateid,
861 sizeof(calldata->arg.stateid));
862 status = nfs4_close_call(NFS_SERVER(inode)->client, calldata);
864 * Return -EINPROGRESS on success in order to indicate to the
865 * caller that an asynchronous RPC call has been launched, and
866 * that it will release the semaphores on completion.
868 return (status == 0) ? -EINPROGRESS : status;
872 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
875 struct rpc_cred *cred;
876 struct nfs4_state *state;
878 if (nd->flags & LOOKUP_CREATE) {
879 attr.ia_mode = nd->intent.open.create_mode;
880 attr.ia_valid = ATTR_MODE;
881 if (!IS_POSIXACL(dir))
882 attr.ia_mode &= ~current->fs->umask;
885 BUG_ON(nd->intent.open.flags & O_CREAT);
888 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
890 return (struct inode *)cred;
891 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
894 return (struct inode *)state;
899 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags)
901 struct rpc_cred *cred;
902 struct nfs4_state *state;
905 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
907 return PTR_ERR(cred);
908 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
910 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
912 if (state == ERR_PTR(-ENOENT) && dentry->d_inode == 0)
916 inode = state->inode;
917 if (inode == dentry->d_inode) {
922 nfs4_close_state(state, openflags);
928 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
930 struct nfs4_server_caps_res res = {};
931 struct rpc_message msg = {
932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
938 status = rpc_call_sync(server->client, &msg, 0);
940 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
941 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
942 server->caps |= NFS_CAP_ACLS;
943 if (res.has_links != 0)
944 server->caps |= NFS_CAP_HARDLINKS;
945 if (res.has_symlinks != 0)
946 server->caps |= NFS_CAP_SYMLINKS;
947 server->acl_bitmask = res.acl_bitmask;
952 static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
954 struct nfs4_exception exception = { };
957 err = nfs4_handle_exception(server,
958 _nfs4_server_capabilities(server, fhandle),
960 } while (exception.retry);
964 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
965 struct nfs_fsinfo *info)
967 struct nfs_fattr * fattr = info->fattr;
968 struct nfs4_lookup_root_arg args = {
969 .bitmask = nfs4_fattr_bitmap,
971 struct nfs4_lookup_res res = {
976 struct rpc_message msg = {
977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
982 return rpc_call_sync(server->client, &msg, 0);
985 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
986 struct nfs_fsinfo *info)
988 struct nfs4_exception exception = { };
991 err = nfs4_handle_exception(server,
992 _nfs4_lookup_root(server, fhandle, info),
994 } while (exception.retry);
998 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
999 struct nfs_fsinfo *info)
1001 struct nfs_fattr * fattr = info->fattr;
1004 struct nfs4_lookup_arg args = {
1007 .bitmask = nfs4_fattr_bitmap,
1009 struct nfs4_lookup_res res = {
1014 struct rpc_message msg = {
1015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1022 * Now we do a separate LOOKUP for each component of the mount path.
1023 * The LOOKUPs are done separately so that we can conveniently
1024 * catch an ERR_WRONGSEC if it occurs along the way...
1026 status = nfs4_lookup_root(server, fhandle, info);
1030 p = server->mnt_path;
1032 struct nfs4_exception exception = { };
1039 while (*p && (*p != '/'))
1045 status = nfs4_handle_exception(server,
1046 rpc_call_sync(server->client, &msg, 0),
1048 } while (exception.retry);
1051 if (status == -ENOENT) {
1052 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1053 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1058 status = nfs4_server_capabilities(server, fhandle);
1060 status = nfs4_do_fsinfo(server, fhandle, info);
1065 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1067 struct nfs4_getattr_arg args = {
1069 .bitmask = server->attr_bitmask,
1071 struct nfs4_getattr_res res = {
1075 struct rpc_message msg = {
1076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1082 return rpc_call_sync(server->client, &msg, 0);
1085 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1087 struct nfs4_exception exception = { };
1090 err = nfs4_handle_exception(server,
1091 _nfs4_proc_getattr(server, fhandle, fattr),
1093 } while (exception.retry);
1098 * The file is not closed if it is opened due to the a request to change
1099 * the size of the file. The open call will not be needed once the
1100 * VFS layer lookup-intents are implemented.
1102 * Close is called when the inode is destroyed.
1103 * If we haven't opened the file for O_WRONLY, we
1104 * need to in the size_change case to obtain a stateid.
1107 * Because OPEN is always done by name in nfsv4, it is
1108 * possible that we opened a different file by the same
1109 * name. We can recognize this race condition, but we
1110 * can't do anything about it besides returning an error.
1112 * This will be fixed with VFS changes (lookup-intent).
1115 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1116 struct iattr *sattr)
1118 struct inode * inode = dentry->d_inode;
1119 int size_change = sattr->ia_valid & ATTR_SIZE;
1120 struct nfs4_state *state = NULL;
1127 struct rpc_cred *cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1129 return PTR_ERR(cred);
1130 state = nfs4_find_state(inode, cred, FMODE_WRITE);
1131 if (state == NULL) {
1132 state = nfs4_open_delegated(dentry->d_inode,
1135 state = nfs4_do_open(dentry->d_parent->d_inode,
1136 dentry, FMODE_WRITE,
1142 return PTR_ERR(state);
1144 if (state->inode != inode) {
1145 printk(KERN_WARNING "nfs: raced in setattr (%p != %p), returning -EIO\n", inode, state->inode);
1150 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1151 NFS_FH(inode), sattr, state);
1154 inode = state->inode;
1155 nfs4_close_state(state, FMODE_WRITE);
1162 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1163 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1166 struct nfs_server *server = NFS_SERVER(dir);
1167 struct nfs4_lookup_arg args = {
1168 .bitmask = server->attr_bitmask,
1169 .dir_fh = NFS_FH(dir),
1172 struct nfs4_lookup_res res = {
1177 struct rpc_message msg = {
1178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1185 dprintk("NFS call lookup %s\n", name->name);
1186 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1187 dprintk("NFS reply lookup: %d\n", status);
1191 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1193 struct nfs4_exception exception = { };
1196 err = nfs4_handle_exception(NFS_SERVER(dir),
1197 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1199 } while (exception.retry);
1203 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1205 struct nfs4_accessargs args = {
1206 .fh = NFS_FH(inode),
1208 struct nfs4_accessres res = { 0 };
1209 struct rpc_message msg = {
1210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1213 .rpc_cred = entry->cred,
1215 int mode = entry->mask;
1219 * Determine which access bits we want to ask for...
1221 if (mode & MAY_READ)
1222 args.access |= NFS4_ACCESS_READ;
1223 if (S_ISDIR(inode->i_mode)) {
1224 if (mode & MAY_WRITE)
1225 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1226 if (mode & MAY_EXEC)
1227 args.access |= NFS4_ACCESS_LOOKUP;
1229 if (mode & MAY_WRITE)
1230 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1231 if (mode & MAY_EXEC)
1232 args.access |= NFS4_ACCESS_EXECUTE;
1234 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1237 if (res.access & NFS4_ACCESS_READ)
1238 entry->mask |= MAY_READ;
1239 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1240 entry->mask |= MAY_WRITE;
1241 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1242 entry->mask |= MAY_EXEC;
1247 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1249 struct nfs4_exception exception = { };
1252 err = nfs4_handle_exception(NFS_SERVER(inode),
1253 _nfs4_proc_access(inode, entry),
1255 } while (exception.retry);
1260 * TODO: For the time being, we don't try to get any attributes
1261 * along with any of the zero-copy operations READ, READDIR,
1264 * In the case of the first three, we want to put the GETATTR
1265 * after the read-type operation -- this is because it is hard
1266 * to predict the length of a GETATTR response in v4, and thus
1267 * align the READ data correctly. This means that the GETATTR
1268 * may end up partially falling into the page cache, and we should
1269 * shift it into the 'tail' of the xdr_buf before processing.
1270 * To do this efficiently, we need to know the total length
1271 * of data received, which doesn't seem to be available outside
1274 * In the case of WRITE, we also want to put the GETATTR after
1275 * the operation -- in this case because we want to make sure
1276 * we get the post-operation mtime and size. This means that
1277 * we can't use xdr_encode_pages() as written: we need a variant
1278 * of it which would leave room in the 'tail' iovec.
1280 * Both of these changes to the XDR layer would in fact be quite
1281 * minor, but I decided to leave them for a subsequent patch.
1283 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1284 unsigned int pgbase, unsigned int pglen)
1286 struct nfs4_readlink args = {
1287 .fh = NFS_FH(inode),
1292 struct rpc_message msg = {
1293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1298 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1301 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1302 unsigned int pgbase, unsigned int pglen)
1304 struct nfs4_exception exception = { };
1307 err = nfs4_handle_exception(NFS_SERVER(inode),
1308 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1310 } while (exception.retry);
1314 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1316 int flags = rdata->flags;
1317 struct inode *inode = rdata->inode;
1318 struct nfs_fattr *fattr = rdata->res.fattr;
1319 struct nfs_server *server = NFS_SERVER(inode);
1320 struct rpc_message msg = {
1321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1322 .rpc_argp = &rdata->args,
1323 .rpc_resp = &rdata->res,
1324 .rpc_cred = rdata->cred,
1326 unsigned long timestamp = jiffies;
1329 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1330 (long long) rdata->args.offset);
1333 status = rpc_call_sync(server->client, &msg, flags);
1335 renew_lease(server, timestamp);
1336 dprintk("NFS reply read: %d\n", status);
1340 static int nfs4_proc_read(struct nfs_read_data *rdata)
1342 struct nfs4_exception exception = { };
1345 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1346 _nfs4_proc_read(rdata),
1348 } while (exception.retry);
1352 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1354 int rpcflags = wdata->flags;
1355 struct inode *inode = wdata->inode;
1356 struct nfs_fattr *fattr = wdata->res.fattr;
1357 struct nfs_server *server = NFS_SERVER(inode);
1358 struct rpc_message msg = {
1359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1360 .rpc_argp = &wdata->args,
1361 .rpc_resp = &wdata->res,
1362 .rpc_cred = wdata->cred,
1366 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1367 (long long) wdata->args.offset);
1370 status = rpc_call_sync(server->client, &msg, rpcflags);
1371 dprintk("NFS reply write: %d\n", status);
1375 static int nfs4_proc_write(struct nfs_write_data *wdata)
1377 struct nfs4_exception exception = { };
1380 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1381 _nfs4_proc_write(wdata),
1383 } while (exception.retry);
1387 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1389 struct inode *inode = cdata->inode;
1390 struct nfs_fattr *fattr = cdata->res.fattr;
1391 struct nfs_server *server = NFS_SERVER(inode);
1392 struct rpc_message msg = {
1393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1394 .rpc_argp = &cdata->args,
1395 .rpc_resp = &cdata->res,
1396 .rpc_cred = cdata->cred,
1400 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1401 (long long) cdata->args.offset);
1404 status = rpc_call_sync(server->client, &msg, 0);
1405 dprintk("NFS reply commit: %d\n", status);
1409 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1411 struct nfs4_exception exception = { };
1414 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1415 _nfs4_proc_commit(cdata),
1417 } while (exception.retry);
1423 * We will need to arrange for the VFS layer to provide an atomic open.
1424 * Until then, this create/open method is prone to inefficiency and race
1425 * conditions due to the lookup, create, and open VFS calls from sys_open()
1426 * placed on the wire.
1428 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1429 * The file will be opened again in the subsequent VFS open call
1430 * (nfs4_proc_file_open).
1432 * The open for read will just hang around to be used by any process that
1433 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1437 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1440 struct nfs4_state *state;
1441 struct rpc_cred *cred;
1444 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1446 status = PTR_ERR(cred);
1449 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1451 if (IS_ERR(state)) {
1452 status = PTR_ERR(state);
1455 d_instantiate(dentry, state->inode);
1456 if (flags & O_EXCL) {
1457 struct nfs_fattr fattr;
1458 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1459 NFS_FH(state->inode), sattr, state);
1462 } else if (flags != 0)
1464 nfs4_close_state(state, flags);
1469 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1471 struct nfs4_remove_arg args = {
1475 struct nfs4_change_info res;
1476 struct rpc_message msg = {
1477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1483 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1485 update_changeattr(dir, &res);
1489 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1491 struct nfs4_exception exception = { };
1494 err = nfs4_handle_exception(NFS_SERVER(dir),
1495 _nfs4_proc_remove(dir, name),
1497 } while (exception.retry);
1501 struct unlink_desc {
1502 struct nfs4_remove_arg args;
1503 struct nfs4_change_info res;
1506 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1509 struct unlink_desc *up;
1511 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1515 up->args.fh = NFS_FH(dir->d_inode);
1516 up->args.name = name;
1518 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1519 msg->rpc_argp = &up->args;
1520 msg->rpc_resp = &up->res;
1524 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1526 struct rpc_message *msg = &task->tk_msg;
1527 struct unlink_desc *up;
1529 if (msg->rpc_resp != NULL) {
1530 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1531 update_changeattr(dir->d_inode, &up->res);
1533 msg->rpc_resp = NULL;
1534 msg->rpc_argp = NULL;
1539 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1540 struct inode *new_dir, struct qstr *new_name)
1542 struct nfs4_rename_arg arg = {
1543 .old_dir = NFS_FH(old_dir),
1544 .new_dir = NFS_FH(new_dir),
1545 .old_name = old_name,
1546 .new_name = new_name,
1548 struct nfs4_rename_res res = { };
1549 struct rpc_message msg = {
1550 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1556 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
1559 update_changeattr(old_dir, &res.old_cinfo);
1560 update_changeattr(new_dir, &res.new_cinfo);
1565 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1566 struct inode *new_dir, struct qstr *new_name)
1568 struct nfs4_exception exception = { };
1571 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1572 _nfs4_proc_rename(old_dir, old_name,
1575 } while (exception.retry);
1579 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1581 struct nfs4_link_arg arg = {
1582 .fh = NFS_FH(inode),
1583 .dir_fh = NFS_FH(dir),
1586 struct nfs4_change_info cinfo = { };
1587 struct rpc_message msg = {
1588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1594 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1596 update_changeattr(dir, &cinfo);
1601 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1603 struct nfs4_exception exception = { };
1606 err = nfs4_handle_exception(NFS_SERVER(inode),
1607 _nfs4_proc_link(inode, dir, name),
1609 } while (exception.retry);
1613 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1614 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1615 struct nfs_fattr *fattr)
1617 struct nfs_server *server = NFS_SERVER(dir);
1618 struct nfs4_create_arg arg = {
1619 .dir_fh = NFS_FH(dir),
1624 .bitmask = server->attr_bitmask,
1626 struct nfs4_create_res res = {
1631 struct rpc_message msg = {
1632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1638 if (path->len > NFS4_MAXPATHLEN)
1639 return -ENAMETOOLONG;
1640 arg.u.symlink = path;
1643 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1645 update_changeattr(dir, &res.dir_cinfo);
1649 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1650 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1651 struct nfs_fattr *fattr)
1653 struct nfs4_exception exception = { };
1656 err = nfs4_handle_exception(NFS_SERVER(dir),
1657 _nfs4_proc_symlink(dir, name, path, sattr,
1660 } while (exception.retry);
1664 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1665 struct iattr *sattr)
1667 struct nfs_server *server = NFS_SERVER(dir);
1668 struct nfs_fh fhandle;
1669 struct nfs_fattr fattr;
1670 struct nfs4_create_arg arg = {
1671 .dir_fh = NFS_FH(dir),
1673 .name = &dentry->d_name,
1676 .bitmask = server->attr_bitmask,
1678 struct nfs4_create_res res = {
1683 struct rpc_message msg = {
1684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1692 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1694 update_changeattr(dir, &res.dir_cinfo);
1695 status = nfs_instantiate(dentry, &fhandle, &fattr);
1700 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1701 struct iattr *sattr)
1703 struct nfs4_exception exception = { };
1706 err = nfs4_handle_exception(NFS_SERVER(dir),
1707 _nfs4_proc_mkdir(dir, dentry, sattr),
1709 } while (exception.retry);
1713 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1714 u64 cookie, struct page *page, unsigned int count, int plus)
1716 struct inode *dir = dentry->d_inode;
1717 struct nfs4_readdir_arg args = {
1722 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1724 struct nfs4_readdir_res res;
1725 struct rpc_message msg = {
1726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
1734 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
1735 res.pgbase = args.pgbase;
1736 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1738 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
1743 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1744 u64 cookie, struct page *page, unsigned int count, int plus)
1746 struct nfs4_exception exception = { };
1749 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
1750 _nfs4_proc_readdir(dentry, cred, cookie,
1753 } while (exception.retry);
1757 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1758 struct iattr *sattr, dev_t rdev)
1760 struct nfs_server *server = NFS_SERVER(dir);
1762 struct nfs_fattr fattr;
1763 struct nfs4_create_arg arg = {
1764 .dir_fh = NFS_FH(dir),
1766 .name = &dentry->d_name,
1768 .bitmask = server->attr_bitmask,
1770 struct nfs4_create_res res = {
1775 struct rpc_message msg = {
1776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1781 int mode = sattr->ia_mode;
1785 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
1786 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
1788 arg.ftype = NF4FIFO;
1789 else if (S_ISBLK(mode)) {
1791 arg.u.device.specdata1 = MAJOR(rdev);
1792 arg.u.device.specdata2 = MINOR(rdev);
1794 else if (S_ISCHR(mode)) {
1796 arg.u.device.specdata1 = MAJOR(rdev);
1797 arg.u.device.specdata2 = MINOR(rdev);
1800 arg.ftype = NF4SOCK;
1802 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1804 update_changeattr(dir, &res.dir_cinfo);
1805 status = nfs_instantiate(dentry, &fh, &fattr);
1810 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1811 struct iattr *sattr, dev_t rdev)
1813 struct nfs4_exception exception = { };
1816 err = nfs4_handle_exception(NFS_SERVER(dir),
1817 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
1819 } while (exception.retry);
1823 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
1824 struct nfs_fsstat *fsstat)
1826 struct nfs4_statfs_arg args = {
1828 .bitmask = server->attr_bitmask,
1830 struct rpc_message msg = {
1831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
1836 fsstat->fattr->valid = 0;
1837 return rpc_call_sync(server->client, &msg, 0);
1840 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
1842 struct nfs4_exception exception = { };
1845 err = nfs4_handle_exception(server,
1846 _nfs4_proc_statfs(server, fhandle, fsstat),
1848 } while (exception.retry);
1852 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
1853 struct nfs_fsinfo *fsinfo)
1855 struct nfs4_fsinfo_arg args = {
1857 .bitmask = server->attr_bitmask,
1859 struct rpc_message msg = {
1860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
1865 return rpc_call_sync(server->client, &msg, 0);
1868 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1870 struct nfs4_exception exception = { };
1874 err = nfs4_handle_exception(server,
1875 _nfs4_do_fsinfo(server, fhandle, fsinfo),
1877 } while (exception.retry);
1881 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1883 fsinfo->fattr->valid = 0;
1884 return nfs4_do_fsinfo(server, fhandle, fsinfo);
1887 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1888 struct nfs_pathconf *pathconf)
1890 struct nfs4_pathconf_arg args = {
1892 .bitmask = server->attr_bitmask,
1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
1897 .rpc_resp = pathconf,
1900 /* None of the pathconf attributes are mandatory to implement */
1901 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
1902 memset(pathconf, 0, sizeof(*pathconf));
1906 pathconf->fattr->valid = 0;
1907 return rpc_call_sync(server->client, &msg, 0);
1910 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1911 struct nfs_pathconf *pathconf)
1913 struct nfs4_exception exception = { };
1917 err = nfs4_handle_exception(server,
1918 _nfs4_proc_pathconf(server, fhandle, pathconf),
1920 } while (exception.retry);
1925 nfs4_read_done(struct rpc_task *task)
1927 struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
1928 struct inode *inode = data->inode;
1930 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1931 rpc_restart_call(task);
1934 if (task->tk_status > 0)
1935 renew_lease(NFS_SERVER(inode), data->timestamp);
1936 /* Call back common NFS readpage processing */
1937 nfs_readpage_result(task);
1941 nfs4_proc_read_setup(struct nfs_read_data *data)
1943 struct rpc_task *task = &data->task;
1944 struct rpc_message msg = {
1945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1946 .rpc_argp = &data->args,
1947 .rpc_resp = &data->res,
1948 .rpc_cred = data->cred,
1950 struct inode *inode = data->inode;
1953 data->timestamp = jiffies;
1955 /* N.B. Do we need to test? Never called for swapfile inode */
1956 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
1958 /* Finalize the task. */
1959 rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
1960 rpc_call_setup(task, &msg, 0);
1964 nfs4_write_done(struct rpc_task *task)
1966 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
1967 struct inode *inode = data->inode;
1969 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1970 rpc_restart_call(task);
1973 if (task->tk_status >= 0)
1974 renew_lease(NFS_SERVER(inode), data->timestamp);
1975 /* Call back common NFS writeback processing */
1976 nfs_writeback_done(task);
1980 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1982 struct rpc_task *task = &data->task;
1983 struct rpc_message msg = {
1984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1985 .rpc_argp = &data->args,
1986 .rpc_resp = &data->res,
1987 .rpc_cred = data->cred,
1989 struct inode *inode = data->inode;
1993 if (how & FLUSH_STABLE) {
1994 if (!NFS_I(inode)->ncommit)
1995 stable = NFS_FILE_SYNC;
1997 stable = NFS_DATA_SYNC;
1999 stable = NFS_UNSTABLE;
2000 data->args.stable = stable;
2002 data->timestamp = jiffies;
2004 /* Set the initial flags for the task. */
2005 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2007 /* Finalize the task. */
2008 rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
2009 rpc_call_setup(task, &msg, 0);
2013 nfs4_commit_done(struct rpc_task *task)
2015 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2016 struct inode *inode = data->inode;
2018 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2019 rpc_restart_call(task);
2022 /* Call back common NFS writeback processing */
2023 nfs_commit_done(task);
2027 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2029 struct rpc_task *task = &data->task;
2030 struct rpc_message msg = {
2031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2032 .rpc_argp = &data->args,
2033 .rpc_resp = &data->res,
2034 .rpc_cred = data->cred,
2036 struct inode *inode = data->inode;
2039 /* Set the initial flags for the task. */
2040 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2042 /* Finalize the task. */
2043 rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
2044 rpc_call_setup(task, &msg, 0);
2048 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2049 * standalone procedure for queueing an asynchronous RENEW.
2052 renew_done(struct rpc_task *task)
2054 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
2055 unsigned long timestamp = (unsigned long)task->tk_calldata;
2057 if (task->tk_status < 0) {
2058 switch (task->tk_status) {
2059 case -NFS4ERR_STALE_CLIENTID:
2060 case -NFS4ERR_EXPIRED:
2061 case -NFS4ERR_CB_PATH_DOWN:
2062 nfs4_schedule_state_recovery(clp);
2066 spin_lock(&clp->cl_lock);
2067 if (time_before(clp->cl_last_renewal,timestamp))
2068 clp->cl_last_renewal = timestamp;
2069 spin_unlock(&clp->cl_lock);
2073 nfs4_proc_async_renew(struct nfs4_client *clp)
2075 struct rpc_message msg = {
2076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2078 .rpc_cred = clp->cl_cred,
2081 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2082 renew_done, (void *)jiffies);
2086 nfs4_proc_renew(struct nfs4_client *clp)
2088 struct rpc_message msg = {
2089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2091 .rpc_cred = clp->cl_cred,
2093 unsigned long now = jiffies;
2096 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2099 spin_lock(&clp->cl_lock);
2100 if (time_before(clp->cl_last_renewal,now))
2101 clp->cl_last_renewal = now;
2102 spin_unlock(&clp->cl_lock);
2107 * We will need to arrange for the VFS layer to provide an atomic open.
2108 * Until then, this open method is prone to inefficiency and race conditions
2109 * due to the lookup, potential create, and open VFS calls from sys_open()
2110 * placed on the wire.
2113 nfs4_proc_file_open(struct inode *inode, struct file *filp)
2115 struct dentry *dentry = filp->f_dentry;
2116 struct nfs_open_context *ctx;
2117 struct nfs4_state *state = NULL;
2118 struct rpc_cred *cred;
2119 int status = -ENOMEM;
2121 dprintk("nfs4_proc_file_open: starting on (%.*s/%.*s)\n",
2122 (int)dentry->d_parent->d_name.len,
2123 dentry->d_parent->d_name.name,
2124 (int)dentry->d_name.len, dentry->d_name.name);
2127 /* Find our open stateid */
2128 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
2130 return PTR_ERR(cred);
2131 ctx = alloc_nfs_open_context(dentry, cred);
2133 if (unlikely(ctx == NULL))
2135 status = -EIO; /* ERACE actually */
2136 state = nfs4_find_state(inode, cred, filp->f_mode);
2137 if (unlikely(state == NULL))
2140 nfs4_close_state(state, filp->f_mode);
2141 ctx->mode = filp->f_mode;
2142 nfs_file_set_open_context(filp, ctx);
2143 put_nfs_open_context(ctx);
2144 if (filp->f_mode & FMODE_WRITE)
2145 nfs_begin_data_update(inode);
2148 printk(KERN_WARNING "NFS: v4 raced in function %s\n", __FUNCTION__);
2149 put_nfs_open_context(ctx);
2157 nfs4_proc_file_release(struct inode *inode, struct file *filp)
2159 if (filp->f_mode & FMODE_WRITE)
2160 nfs_end_data_update(inode);
2161 nfs_file_clear_open_context(filp);
2166 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server)
2168 struct nfs4_client *clp = server->nfs4_state;
2170 if (!clp || task->tk_status >= 0)
2172 switch(task->tk_status) {
2173 case -NFS4ERR_STALE_CLIENTID:
2174 case -NFS4ERR_STALE_STATEID:
2175 case -NFS4ERR_EXPIRED:
2176 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2177 nfs4_schedule_state_recovery(clp);
2178 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2179 rpc_wake_up_task(task);
2180 task->tk_status = 0;
2182 case -NFS4ERR_GRACE:
2183 case -NFS4ERR_DELAY:
2184 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2185 task->tk_status = 0;
2187 case -NFS4ERR_OLD_STATEID:
2188 task->tk_status = 0;
2191 task->tk_status = nfs4_map_errors(task->tk_status);
2195 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2199 int interruptible, res = 0;
2203 rpc_clnt_sigmask(clnt, &oldset);
2204 interruptible = TASK_UNINTERRUPTIBLE;
2206 interruptible = TASK_INTERRUPTIBLE;
2207 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2208 nfs4_schedule_state_recovery(clp);
2209 if (clnt->cl_intr && signalled())
2211 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2213 finish_wait(&clp->cl_waitq, &wait);
2214 rpc_clnt_sigunmask(clnt, &oldset);
2218 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2226 *timeout = NFS4_POLL_RETRY_MIN;
2227 if (*timeout > NFS4_POLL_RETRY_MAX)
2228 *timeout = NFS4_POLL_RETRY_MAX;
2229 rpc_clnt_sigmask(clnt, &oldset);
2230 if (clnt->cl_intr) {
2231 set_current_state(TASK_INTERRUPTIBLE);
2232 schedule_timeout(*timeout);
2236 set_current_state(TASK_UNINTERRUPTIBLE);
2237 schedule_timeout(*timeout);
2239 rpc_clnt_sigunmask(clnt, &oldset);
2244 /* This is the error handling routine for processes that are allowed
2247 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2249 struct nfs4_client *clp = server->nfs4_state;
2250 int ret = errorcode;
2252 exception->retry = 0;
2256 case -NFS4ERR_STALE_CLIENTID:
2257 case -NFS4ERR_STALE_STATEID:
2258 case -NFS4ERR_EXPIRED:
2259 ret = nfs4_wait_clnt_recover(server->client, clp);
2261 exception->retry = 1;
2263 case -NFS4ERR_GRACE:
2264 case -NFS4ERR_DELAY:
2265 ret = nfs4_delay(server->client, &exception->timeout);
2267 exception->retry = 1;
2269 case -NFS4ERR_OLD_STATEID:
2271 exception->retry = 1;
2273 /* We failed to handle the error */
2274 return nfs4_map_errors(ret);
2277 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2279 nfs4_verifier sc_verifier;
2280 struct nfs4_setclientid setclientid = {
2281 .sc_verifier = &sc_verifier,
2284 struct rpc_message msg = {
2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2286 .rpc_argp = &setclientid,
2288 .rpc_cred = clp->cl_cred,
2294 p = (u32*)sc_verifier.data;
2295 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2296 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2299 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2300 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2301 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2302 clp->cl_cred->cr_ops->cr_name,
2303 clp->cl_id_uniquifier);
2304 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2305 sizeof(setclientid.sc_netid), "tcp");
2306 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2307 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2308 clp->cl_ipaddr, port >> 8, port & 255);
2310 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2311 if (status != -NFS4ERR_CLID_INUSE)
2316 ssleep(clp->cl_lease_time + 1);
2318 if (++clp->cl_id_uniquifier == 0)
2325 nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2327 struct nfs_fsinfo fsinfo;
2328 struct rpc_message msg = {
2329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2331 .rpc_resp = &fsinfo,
2332 .rpc_cred = clp->cl_cred,
2338 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2340 spin_lock(&clp->cl_lock);
2341 clp->cl_lease_time = fsinfo.lease_time * HZ;
2342 clp->cl_last_renewal = now;
2343 spin_unlock(&clp->cl_lock);
2348 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2350 struct nfs4_delegreturnargs args = {
2351 .fhandle = NFS_FH(inode),
2354 struct rpc_message msg = {
2355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2360 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2363 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2365 struct nfs_server *server = NFS_SERVER(inode);
2366 struct nfs4_exception exception = { };
2369 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2371 case -NFS4ERR_STALE_STATEID:
2372 case -NFS4ERR_EXPIRED:
2373 nfs4_schedule_state_recovery(server->nfs4_state);
2377 err = nfs4_handle_exception(server, err, &exception);
2378 } while (exception.retry);
2382 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2383 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2386 * sleep, with exponential backoff, and retry the LOCK operation.
2388 static unsigned long
2389 nfs4_set_lock_task_retry(unsigned long timeout)
2391 current->state = TASK_INTERRUPTIBLE;
2392 schedule_timeout(timeout);
2394 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2395 return NFS4_LOCK_MAXTIMEOUT;
2400 nfs4_lck_type(int cmd, struct file_lock *request)
2403 switch (request->fl_type) {
2405 return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
2407 return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
2409 return NFS4_WRITE_LT;
2415 static inline uint64_t
2416 nfs4_lck_length(struct file_lock *request)
2418 if (request->fl_end == OFFSET_MAX)
2419 return ~(uint64_t)0;
2420 return request->fl_end - request->fl_start + 1;
2423 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2425 struct inode *inode = state->inode;
2426 struct nfs_server *server = NFS_SERVER(inode);
2427 struct nfs4_client *clp = server->nfs4_state;
2428 struct nfs_lockargs arg = {
2429 .fh = NFS_FH(inode),
2430 .type = nfs4_lck_type(cmd, request),
2431 .offset = request->fl_start,
2432 .length = nfs4_lck_length(request),
2434 struct nfs_lockres res = {
2437 struct rpc_message msg = {
2438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2441 .rpc_cred = state->owner->so_cred,
2443 struct nfs_lowner nlo;
2444 struct nfs4_lock_state *lsp;
2447 down_read(&clp->cl_sem);
2448 nlo.clientid = clp->cl_clientid;
2449 down(&state->lock_sema);
2450 lsp = nfs4_find_lock_state(state, request->fl_owner);
2452 nlo.id = lsp->ls_id;
2454 spin_lock(&clp->cl_lock);
2455 nlo.id = nfs4_alloc_lockowner_id(clp);
2456 spin_unlock(&clp->cl_lock);
2459 status = rpc_call_sync(server->client, &msg, 0);
2461 request->fl_type = F_UNLCK;
2462 } else if (status == -NFS4ERR_DENIED) {
2463 int64_t len, start, end;
2464 start = res.u.denied.offset;
2465 len = res.u.denied.length;
2466 end = start + len - 1;
2467 if (end < 0 || len == 0)
2468 request->fl_end = OFFSET_MAX;
2470 request->fl_end = (loff_t)end;
2471 request->fl_start = (loff_t)start;
2472 request->fl_type = F_WRLCK;
2473 if (res.u.denied.type & 1)
2474 request->fl_type = F_RDLCK;
2475 request->fl_pid = 0;
2479 nfs4_put_lock_state(lsp);
2480 up(&state->lock_sema);
2481 up_read(&clp->cl_sem);
2485 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2487 struct nfs4_exception exception = { };
2491 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2492 _nfs4_proc_getlk(state, cmd, request),
2494 } while (exception.retry);
2498 static int do_vfs_lock(struct file *file, struct file_lock *fl)
2501 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
2503 res = posix_lock_file_wait(file, fl);
2506 res = flock_lock_file_wait(file, fl);
2512 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
2517 static int _nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2519 struct inode *inode = state->inode;
2520 struct nfs_server *server = NFS_SERVER(inode);
2521 struct nfs4_client *clp = server->nfs4_state;
2522 struct nfs_lockargs arg = {
2523 .fh = NFS_FH(inode),
2524 .type = nfs4_lck_type(cmd, request),
2525 .offset = request->fl_start,
2526 .length = nfs4_lck_length(request),
2528 struct nfs_lockres res = {
2531 struct rpc_message msg = {
2532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
2535 .rpc_cred = state->owner->so_cred,
2537 struct nfs4_lock_state *lsp;
2538 struct nfs_locku_opargs luargs;
2541 down_read(&clp->cl_sem);
2542 down(&state->lock_sema);
2543 lsp = nfs4_find_lock_state(state, request->fl_owner);
2546 /* We might have lost the locks! */
2547 if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) {
2548 luargs.seqid = lsp->ls_seqid;
2549 memcpy(&luargs.stateid, &lsp->ls_stateid, sizeof(luargs.stateid));
2550 arg.u.locku = &luargs;
2551 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2552 nfs4_increment_lock_seqid(status, lsp);
2556 memcpy(&lsp->ls_stateid, &res.u.stateid,
2557 sizeof(lsp->ls_stateid));
2558 nfs4_notify_unlck(state, request, lsp);
2560 nfs4_put_lock_state(lsp);
2562 up(&state->lock_sema);
2564 do_vfs_lock(request->fl_file, request);
2565 up_read(&clp->cl_sem);
2569 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2571 struct nfs4_exception exception = { };
2575 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2576 _nfs4_proc_unlck(state, cmd, request),
2578 } while (exception.retry);
2582 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
2584 struct inode *inode = state->inode;
2585 struct nfs_server *server = NFS_SERVER(inode);
2586 struct nfs4_lock_state *lsp;
2587 struct nfs_lockargs arg = {
2588 .fh = NFS_FH(inode),
2589 .type = nfs4_lck_type(cmd, request),
2590 .offset = request->fl_start,
2591 .length = nfs4_lck_length(request),
2593 struct nfs_lockres res = {
2596 struct rpc_message msg = {
2597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
2600 .rpc_cred = state->owner->so_cred,
2602 struct nfs_lock_opargs largs = {
2604 .new_lock_owner = 0,
2608 lsp = nfs4_get_lock_state(state, request->fl_owner);
2611 if (!(lsp->ls_flags & NFS_LOCK_INITIALIZED)) {
2612 struct nfs4_state_owner *owner = state->owner;
2613 struct nfs_open_to_lock otl = {
2615 .clientid = server->nfs4_state->cl_clientid,
2619 otl.lock_seqid = lsp->ls_seqid;
2620 otl.lock_owner.id = lsp->ls_id;
2621 memcpy(&otl.open_stateid, &state->stateid, sizeof(otl.open_stateid));
2622 largs.u.open_lock = &otl;
2623 largs.new_lock_owner = 1;
2624 arg.u.lock = &largs;
2625 down(&owner->so_sema);
2626 otl.open_seqid = owner->so_seqid;
2627 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2628 /* increment open_owner seqid on success, and
2629 * seqid mutating errors */
2630 nfs4_increment_seqid(status, owner);
2631 up(&owner->so_sema);
2633 struct nfs_exist_lock el = {
2634 .seqid = lsp->ls_seqid,
2636 memcpy(&el.stateid, &lsp->ls_stateid, sizeof(el.stateid));
2637 largs.u.exist_lock = ⪙
2638 largs.new_lock_owner = 0;
2639 arg.u.lock = &largs;
2640 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2642 /* increment seqid on success, and * seqid mutating errors*/
2643 nfs4_increment_lock_seqid(status, lsp);
2644 /* save the returned stateid. */
2646 memcpy(&lsp->ls_stateid, &res.u.stateid, sizeof(nfs4_stateid));
2647 lsp->ls_flags |= NFS_LOCK_INITIALIZED;
2649 nfs4_notify_setlk(state, request, lsp);
2650 } else if (status == -NFS4ERR_DENIED)
2652 nfs4_put_lock_state(lsp);
2656 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
2658 return _nfs4_do_setlk(state, F_SETLK, request, 1);
2661 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
2663 return _nfs4_do_setlk(state, F_SETLK, request, 0);
2666 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2668 struct nfs4_client *clp = state->owner->so_client;
2671 down_read(&clp->cl_sem);
2672 down(&state->lock_sema);
2673 status = _nfs4_do_setlk(state, cmd, request, 0);
2674 up(&state->lock_sema);
2676 /* Note: we always want to sleep here! */
2677 request->fl_flags |= FL_SLEEP;
2678 if (do_vfs_lock(request->fl_file, request) < 0)
2679 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
2681 up_read(&clp->cl_sem);
2685 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2687 struct nfs4_exception exception = { };
2691 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2692 _nfs4_proc_setlk(state, cmd, request),
2694 } while (exception.retry);
2699 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
2701 struct nfs_open_context *ctx;
2702 struct nfs4_state *state;
2703 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
2706 /* verify open state */
2707 ctx = (struct nfs_open_context *)filp->private_data;
2710 if (request->fl_start < 0 || request->fl_end < 0)
2714 return nfs4_proc_getlk(state, F_GETLK, request);
2716 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
2719 if (request->fl_type == F_UNLCK)
2720 return nfs4_proc_unlck(state, cmd, request);
2723 status = nfs4_proc_setlk(state, cmd, request);
2724 if ((status != -EAGAIN) || IS_SETLK(cmd))
2726 timeout = nfs4_set_lock_task_retry(timeout);
2727 status = -ERESTARTSYS;
2730 } while(status < 0);
2735 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
2736 .recover_open = nfs4_open_reclaim,
2737 .recover_lock = nfs4_lock_reclaim,
2740 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
2741 .recover_open = nfs4_open_expired,
2742 .recover_lock = nfs4_lock_expired,
2745 struct nfs_rpc_ops nfs_v4_clientops = {
2746 .version = 4, /* protocol version */
2747 .dentry_ops = &nfs4_dentry_operations,
2748 .dir_inode_ops = &nfs4_dir_inode_operations,
2749 .file_inode_ops = &nfs_file_inode_operations,
2750 .getroot = nfs4_proc_get_root,
2751 .getattr = nfs4_proc_getattr,
2752 .setattr = nfs4_proc_setattr,
2753 .lookup = nfs4_proc_lookup,
2754 .access = nfs4_proc_access,
2755 .readlink = nfs4_proc_readlink,
2756 .read = nfs4_proc_read,
2757 .write = nfs4_proc_write,
2758 .commit = nfs4_proc_commit,
2759 .create = nfs4_proc_create,
2760 .remove = nfs4_proc_remove,
2761 .unlink_setup = nfs4_proc_unlink_setup,
2762 .unlink_done = nfs4_proc_unlink_done,
2763 .rename = nfs4_proc_rename,
2764 .link = nfs4_proc_link,
2765 .symlink = nfs4_proc_symlink,
2766 .mkdir = nfs4_proc_mkdir,
2767 .rmdir = nfs4_proc_remove,
2768 .readdir = nfs4_proc_readdir,
2769 .mknod = nfs4_proc_mknod,
2770 .statfs = nfs4_proc_statfs,
2771 .fsinfo = nfs4_proc_fsinfo,
2772 .pathconf = nfs4_proc_pathconf,
2773 .decode_dirent = nfs4_decode_dirent,
2774 .read_setup = nfs4_proc_read_setup,
2775 .write_setup = nfs4_proc_write_setup,
2776 .commit_setup = nfs4_proc_commit_setup,
2777 .file_open = nfs4_proc_file_open,
2778 .file_release = nfs4_proc_file_release,
2779 .lock = nfs4_proc_lock,