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>
50 #include <linux/mount.h>
53 #include "delegation.h"
55 #define NFSDBG_FACILITY NFSDBG_PROC
57 #define NFS4_POLL_RETRY_MIN (1*HZ)
58 #define NFS4_POLL_RETRY_MAX (15*HZ)
60 static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid);
61 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
62 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
63 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
64 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
65 extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
66 extern struct rpc_procinfo nfs4_procedures[];
68 /* Prevent leaks of NFSv4 errors into userland */
69 int nfs4_map_errors(int err)
72 dprintk("%s could not handle NFSv4 error %d\n",
80 * This is our standard bitmap for GETATTR requests.
82 const u32 nfs4_fattr_bitmap[2] = {
87 | FATTR4_WORD0_FILEID,
89 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_SPACE_USED
94 | FATTR4_WORD1_TIME_ACCESS
95 | FATTR4_WORD1_TIME_METADATA
96 | FATTR4_WORD1_TIME_MODIFY
99 const u32 nfs4_statfs_bitmap[2] = {
100 FATTR4_WORD0_FILES_AVAIL
101 | FATTR4_WORD0_FILES_FREE
102 | FATTR4_WORD0_FILES_TOTAL,
103 FATTR4_WORD1_SPACE_AVAIL
104 | FATTR4_WORD1_SPACE_FREE
105 | FATTR4_WORD1_SPACE_TOTAL
108 const u32 nfs4_pathconf_bitmap[2] = {
110 | FATTR4_WORD0_MAXNAME,
114 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
115 | FATTR4_WORD0_MAXREAD
116 | FATTR4_WORD0_MAXWRITE
117 | FATTR4_WORD0_LEASE_TIME,
121 static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
122 struct nfs4_readdir_arg *readdir)
126 BUG_ON(readdir->count < 80);
128 readdir->cookie = cookie;
129 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
134 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
139 * NFSv4 servers do not return entries for '.' and '..'
140 * Therefore, we fake these entries here. We let '.'
141 * have cookie 0 and '..' have cookie 1. Note that
142 * when talking to the server, we always send cookie 0
145 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
148 *p++ = xdr_one; /* next */
149 *p++ = xdr_zero; /* cookie, first word */
150 *p++ = xdr_one; /* cookie, second word */
151 *p++ = xdr_one; /* entry len */
152 memcpy(p, ".\0\0\0", 4); /* entry */
154 *p++ = xdr_one; /* bitmap length */
155 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
156 *p++ = htonl(8); /* attribute buffer length */
157 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
160 *p++ = xdr_one; /* next */
161 *p++ = xdr_zero; /* cookie, first word */
162 *p++ = xdr_two; /* cookie, second word */
163 *p++ = xdr_two; /* entry len */
164 memcpy(p, "..\0\0", 4); /* entry */
166 *p++ = xdr_one; /* bitmap length */
167 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
168 *p++ = htonl(8); /* attribute buffer length */
169 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
171 readdir->pgbase = (char *)p - (char *)start;
172 readdir->count -= readdir->pgbase;
173 kunmap_atomic(start, KM_USER0);
177 renew_lease(struct nfs_server *server, unsigned long timestamp)
179 struct nfs4_client *clp = server->nfs4_state;
180 spin_lock(&clp->cl_lock);
181 if (time_before(clp->cl_last_renewal,timestamp))
182 clp->cl_last_renewal = timestamp;
183 spin_unlock(&clp->cl_lock);
186 static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
188 struct nfs_inode *nfsi = NFS_I(inode);
190 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
191 nfsi->change_attr = cinfo->after;
194 /* Helper for asynchronous RPC calls */
195 static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
196 rpc_action tk_exit, void *calldata)
198 struct rpc_task *task;
200 if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
203 task->tk_calldata = calldata;
204 task->tk_action = tk_begin;
209 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
211 struct inode *inode = state->inode;
213 open_flags &= (FMODE_READ|FMODE_WRITE);
214 /* Protect against nfs4_find_state() */
215 spin_lock(&inode->i_lock);
216 state->state |= open_flags;
217 /* NB! List reordering - see the reclaim code for why. */
218 if ((open_flags & FMODE_WRITE) && 0 == state->nwriters++)
219 list_move(&state->open_states, &state->owner->so_states);
220 if (open_flags & FMODE_READ)
222 memcpy(&state->stateid, stateid, sizeof(state->stateid));
223 spin_unlock(&inode->i_lock);
228 * reclaim state on the server after a reboot.
230 static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
232 struct inode *inode = state->inode;
233 struct nfs_server *server = NFS_SERVER(inode);
234 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
235 struct nfs_openargs o_arg = {
238 .open_flags = state->state,
239 .clientid = server->nfs4_state->cl_clientid,
240 .claim = NFS4_OPEN_CLAIM_PREVIOUS,
241 .bitmask = server->attr_bitmask,
243 struct nfs_openres o_res = {
244 .server = server, /* Grrr */
246 struct rpc_message msg = {
247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
250 .rpc_cred = sp->so_cred,
254 if (delegation != NULL) {
255 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
256 memcpy(&state->stateid, &delegation->stateid,
257 sizeof(state->stateid));
258 set_bit(NFS_DELEGATED_STATE, &state->flags);
261 o_arg.u.delegation_type = delegation->type;
263 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
264 if (o_arg.seqid == NULL)
266 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
267 /* Confirm the sequence as being established */
268 nfs_confirm_seqid(&sp->so_seqid, status);
269 nfs_increment_open_seqid(status, o_arg.seqid);
271 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
272 if (o_res.delegation_type != 0) {
273 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
274 /* Did the server issue an immediate delegation recall? */
276 nfs_async_inode_return_delegation(inode, &o_res.stateid);
279 nfs_free_seqid(o_arg.seqid);
280 clear_bit(NFS_DELEGATED_STATE, &state->flags);
281 /* Ensure we update the inode attributes */
286 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
288 struct nfs_server *server = NFS_SERVER(state->inode);
289 struct nfs4_exception exception = { };
292 err = _nfs4_open_reclaim(sp, state);
293 if (err != -NFS4ERR_DELAY)
295 nfs4_handle_exception(server, err, &exception);
296 } while (exception.retry);
300 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
302 struct nfs4_state_owner *sp = state->owner;
303 struct inode *inode = dentry->d_inode;
304 struct nfs_server *server = NFS_SERVER(inode);
305 struct dentry *parent = dget_parent(dentry);
306 struct nfs_openargs arg = {
307 .fh = NFS_FH(parent->d_inode),
308 .clientid = server->nfs4_state->cl_clientid,
309 .name = &dentry->d_name,
312 .bitmask = server->attr_bitmask,
313 .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
315 struct nfs_openres res = {
318 struct rpc_message msg = {
319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
322 .rpc_cred = sp->so_cred,
326 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
328 if (state->state == 0)
330 arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
332 if (arg.seqid == NULL)
334 arg.open_flags = state->state;
335 memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
336 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
337 nfs_increment_open_seqid(status, arg.seqid);
340 if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
341 status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode),
342 sp, &res.stateid, arg.seqid);
346 nfs_confirm_seqid(&sp->so_seqid, 0);
348 memcpy(state->stateid.data, res.stateid.data,
349 sizeof(state->stateid.data));
350 clear_bit(NFS_DELEGATED_STATE, &state->flags);
353 nfs_free_seqid(arg.seqid);
359 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
361 struct nfs4_exception exception = { };
362 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
365 err = _nfs4_open_delegation_recall(dentry, state);
369 case -NFS4ERR_STALE_CLIENTID:
370 case -NFS4ERR_STALE_STATEID:
371 case -NFS4ERR_EXPIRED:
372 /* Don't recall a delegation if it was lost */
373 nfs4_schedule_state_recovery(server->nfs4_state);
376 err = nfs4_handle_exception(server, err, &exception);
377 } while (exception.retry);
381 static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid)
383 struct nfs_open_confirmargs arg = {
388 struct nfs_open_confirmres res;
389 struct rpc_message msg = {
390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
393 .rpc_cred = sp->so_cred,
397 status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
398 /* Confirm the sequence as being established */
399 nfs_confirm_seqid(&sp->so_seqid, status);
400 nfs_increment_open_seqid(status, seqid);
402 memcpy(stateid, &res.stateid, sizeof(*stateid));
406 static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res)
408 struct nfs_server *server = NFS_SERVER(dir);
409 struct rpc_message msg = {
410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
413 .rpc_cred = sp->so_cred,
417 /* Update sequence id. The caller must serialize! */
418 o_arg->id = sp->so_id;
419 o_arg->clientid = sp->so_client->cl_clientid;
421 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
423 /* OPEN on anything except a regular file is disallowed in NFSv4 */
424 switch (o_res->f_attr->mode & S_IFMT) {
438 nfs_increment_open_seqid(status, o_arg->seqid);
441 update_changeattr(dir, &o_res->cinfo);
442 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
443 status = _nfs4_proc_open_confirm(server->client, &o_res->fh,
444 sp, &o_res->stateid, o_arg->seqid);
448 nfs_confirm_seqid(&sp->so_seqid, 0);
449 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
450 status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
455 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
457 struct nfs_access_entry cache;
461 if (openflags & FMODE_READ)
463 if (openflags & FMODE_WRITE)
465 status = nfs_access_get_cached(inode, cred, &cache);
469 /* Be clever: ask server to check for all possible rights */
470 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
472 cache.jiffies = jiffies;
473 status = _nfs4_proc_access(inode, &cache);
476 nfs_access_add_cache(inode, &cache);
478 if ((cache.mask & mask) == mask)
485 * reclaim state on the server after a network partition.
486 * Assumes caller holds the appropriate lock
488 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
490 struct dentry *parent = dget_parent(dentry);
491 struct inode *dir = parent->d_inode;
492 struct inode *inode = state->inode;
493 struct nfs_server *server = NFS_SERVER(dir);
494 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
495 struct nfs_fattr f_attr = {
498 struct nfs_openargs o_arg = {
500 .open_flags = state->state,
501 .name = &dentry->d_name,
502 .bitmask = server->attr_bitmask,
503 .claim = NFS4_OPEN_CLAIM_NULL,
505 struct nfs_openres o_res = {
511 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
512 status = _nfs4_do_access(inode, sp->so_cred, state->state);
515 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
516 set_bit(NFS_DELEGATED_STATE, &state->flags);
519 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
521 if (o_arg.seqid == NULL)
523 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
526 /* Check if files differ */
527 if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
529 /* Has the file handle changed? */
530 if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) {
531 /* Verify if the change attributes are the same */
532 if (f_attr.change_attr != NFS_I(inode)->change_attr)
534 if (nfs_size_to_loff_t(f_attr.size) != inode->i_size)
536 /* Lets just pretend that this is the same file */
537 nfs_copy_fh(NFS_FH(inode), &o_res.fh);
538 NFS_I(inode)->fileid = f_attr.fileid;
540 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
541 if (o_res.delegation_type != 0) {
542 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
543 nfs_inode_set_delegation(inode, sp->so_cred, &o_res);
545 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
548 nfs_free_seqid(o_arg.seqid);
549 clear_bit(NFS_DELEGATED_STATE, &state->flags);
555 /* Invalidate the state owner so we don't ever use it again */
556 nfs4_drop_state_owner(sp);
558 /* Should we be trying to close that stateid? */
562 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
564 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
565 struct nfs4_exception exception = { };
569 err = _nfs4_open_expired(sp, state, dentry);
570 if (err == -NFS4ERR_DELAY)
571 nfs4_handle_exception(server, err, &exception);
572 } while (exception.retry);
576 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
578 struct nfs_inode *nfsi = NFS_I(state->inode);
579 struct nfs_open_context *ctx;
582 spin_lock(&state->inode->i_lock);
583 list_for_each_entry(ctx, &nfsi->open_files, list) {
584 if (ctx->state != state)
586 get_nfs_open_context(ctx);
587 spin_unlock(&state->inode->i_lock);
588 status = nfs4_do_open_expired(sp, state, ctx->dentry);
589 put_nfs_open_context(ctx);
592 spin_unlock(&state->inode->i_lock);
597 * Returns an nfs4_state + an extra reference to the inode
599 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
601 struct nfs_delegation *delegation;
602 struct nfs_server *server = NFS_SERVER(inode);
603 struct nfs4_client *clp = server->nfs4_state;
604 struct nfs_inode *nfsi = NFS_I(inode);
605 struct nfs4_state_owner *sp = NULL;
606 struct nfs4_state *state = NULL;
607 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
610 /* Protect against reboot recovery - NOTE ORDER! */
611 down_read(&clp->cl_sem);
612 /* Protect against delegation recall */
613 down_read(&nfsi->rwsem);
614 delegation = NFS_I(inode)->delegation;
616 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
619 if (!(sp = nfs4_get_state_owner(server, cred))) {
620 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
623 state = nfs4_get_open_state(inode, sp);
628 if ((state->state & open_flags) == open_flags) {
629 spin_lock(&inode->i_lock);
630 if (open_flags & FMODE_READ)
632 if (open_flags & FMODE_WRITE)
634 spin_unlock(&inode->i_lock);
636 } else if (state->state != 0)
640 err = _nfs4_do_access(inode, cred, open_flags);
644 set_bit(NFS_DELEGATED_STATE, &state->flags);
645 update_open_stateid(state, &delegation->stateid, open_flags);
647 nfs4_put_state_owner(sp);
648 up_read(&nfsi->rwsem);
649 up_read(&clp->cl_sem);
656 nfs4_put_open_state(state);
657 nfs4_put_state_owner(sp);
659 up_read(&nfsi->rwsem);
660 up_read(&clp->cl_sem);
662 nfs_inode_return_delegation(inode);
666 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
668 struct nfs4_exception exception = { };
669 struct nfs4_state *res;
673 err = _nfs4_open_delegated(inode, flags, cred, &res);
676 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
678 } while (exception.retry);
683 * Returns an nfs4_state + an referenced inode
685 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
687 struct nfs4_state_owner *sp;
688 struct nfs4_state *state = NULL;
689 struct nfs_server *server = NFS_SERVER(dir);
690 struct nfs4_client *clp = server->nfs4_state;
691 struct inode *inode = NULL;
693 struct nfs_fattr f_attr = {
696 struct nfs_openargs o_arg = {
699 .name = &dentry->d_name,
701 .bitmask = server->attr_bitmask,
702 .claim = NFS4_OPEN_CLAIM_NULL,
704 struct nfs_openres o_res = {
709 /* Protect against reboot recovery conflicts */
710 down_read(&clp->cl_sem);
712 if (!(sp = nfs4_get_state_owner(server, cred))) {
713 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
716 if (flags & O_EXCL) {
717 u32 *p = (u32 *) o_arg.u.verifier.data;
721 o_arg.u.attrs = sattr;
722 /* Serialization for the sequence id */
724 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
725 if (o_arg.seqid == NULL)
727 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
732 inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
735 state = nfs4_get_open_state(inode, sp);
738 update_open_stateid(state, &o_res.stateid, flags);
739 if (o_res.delegation_type != 0)
740 nfs_inode_set_delegation(inode, cred, &o_res);
741 nfs_free_seqid(o_arg.seqid);
742 nfs4_put_state_owner(sp);
743 up_read(&clp->cl_sem);
749 nfs4_put_open_state(state);
750 nfs_free_seqid(o_arg.seqid);
751 nfs4_put_state_owner(sp);
753 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
754 up_read(&clp->cl_sem);
762 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
764 struct nfs4_exception exception = { };
765 struct nfs4_state *res;
769 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
772 /* NOTE: BAD_SEQID means the server and client disagree about the
773 * book-keeping w.r.t. state-changing operations
774 * (OPEN/CLOSE/LOCK/LOCKU...)
775 * It is actually a sign of a bug on the client or on the server.
777 * If we receive a BAD_SEQID error in the particular case of
778 * doing an OPEN, we assume that nfs_increment_open_seqid() will
779 * have unhashed the old state_owner for us, and that we can
780 * therefore safely retry using a new one. We should still warn
783 if (status == -NFS4ERR_BAD_SEQID) {
784 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
789 * BAD_STATEID on OPEN means that the server cancelled our
790 * state before it received the OPEN_CONFIRM.
791 * Recover by retrying the request as per the discussion
792 * on Page 181 of RFC3530.
794 if (status == -NFS4ERR_BAD_STATEID) {
798 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
799 status, &exception));
800 } while (exception.retry);
804 static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
805 struct nfs_fh *fhandle, struct iattr *sattr,
806 struct nfs4_state *state)
808 struct nfs_setattrargs arg = {
812 .bitmask = server->attr_bitmask,
814 struct nfs_setattrres res = {
818 struct rpc_message msg = {
819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
828 msg.rpc_cred = state->owner->so_cred;
829 nfs4_copy_stateid(&arg.stateid, state, current->files);
831 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
833 status = rpc_call_sync(server->client, &msg, 0);
837 static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
838 struct nfs_fh *fhandle, struct iattr *sattr,
839 struct nfs4_state *state)
841 struct nfs4_exception exception = { };
844 err = nfs4_handle_exception(server,
845 _nfs4_do_setattr(server, fattr, fhandle, sattr,
848 } while (exception.retry);
852 struct nfs4_closedata {
854 struct nfs4_state *state;
855 struct nfs_closeargs arg;
856 struct nfs_closeres res;
859 static void nfs4_free_closedata(struct nfs4_closedata *calldata)
861 struct nfs4_state *state = calldata->state;
862 struct nfs4_state_owner *sp = state->owner;
864 nfs4_put_open_state(calldata->state);
865 nfs_free_seqid(calldata->arg.seqid);
866 nfs4_put_state_owner(sp);
870 static void nfs4_close_done(struct rpc_task *task)
872 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
873 struct nfs4_state *state = calldata->state;
874 struct nfs_server *server = NFS_SERVER(calldata->inode);
876 /* hmm. we are done with the inode, and in the process of freeing
877 * the state_owner. we keep this around to process errors
879 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
880 switch (task->tk_status) {
882 memcpy(&state->stateid, &calldata->res.stateid,
883 sizeof(state->stateid));
885 case -NFS4ERR_STALE_STATEID:
886 case -NFS4ERR_EXPIRED:
887 state->state = calldata->arg.open_flags;
888 nfs4_schedule_state_recovery(server->nfs4_state);
891 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
892 rpc_restart_call(task);
896 state->state = calldata->arg.open_flags;
897 nfs4_free_closedata(calldata);
900 static void nfs4_close_begin(struct rpc_task *task)
902 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
903 struct nfs4_state *state = calldata->state;
904 struct rpc_message msg = {
905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
906 .rpc_argp = &calldata->arg,
907 .rpc_resp = &calldata->res,
908 .rpc_cred = state->owner->so_cred,
913 status = nfs_wait_on_sequence(calldata->arg.seqid, task);
916 /* Don't reorder reads */
918 /* Recalculate the new open mode in case someone reopened the file
919 * while we were waiting in line to be scheduled.
921 if (state->nreaders != 0)
923 if (state->nwriters != 0)
925 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
927 if (mode == state->state) {
928 nfs4_free_closedata(calldata);
929 task->tk_exit = NULL;
934 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
935 calldata->arg.open_flags = mode;
936 rpc_call_setup(task, &msg, 0);
940 * It is possible for data to be read/written from a mem-mapped file
941 * after the sys_close call (which hits the vfs layer as a flush).
942 * This means that we can't safely call nfsv4 close on a file until
943 * the inode is cleared. This in turn means that we are not good
944 * NFSv4 citizens - we do not indicate to the server to update the file's
945 * share state even when we are done with one of the three share
946 * stateid's in the inode.
948 * NOTE: Caller must be holding the sp->so_owner semaphore!
950 int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
952 struct nfs4_closedata *calldata;
953 int status = -ENOMEM;
955 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
956 if (calldata == NULL)
958 calldata->inode = inode;
959 calldata->state = state;
960 calldata->arg.fh = NFS_FH(inode);
961 calldata->arg.stateid = &state->stateid;
962 /* Serialization for the sequence id */
963 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
964 if (calldata->arg.seqid == NULL)
965 goto out_free_calldata;
967 status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_close_begin,
968 nfs4_close_done, calldata);
972 nfs_free_seqid(calldata->arg.seqid);
979 static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
983 filp = lookup_instantiate_filp(nd, dentry, NULL);
985 struct nfs_open_context *ctx;
986 ctx = (struct nfs_open_context *)filp->private_data;
989 nfs4_close_state(state, nd->intent.open.flags);
993 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
996 struct rpc_cred *cred;
997 struct nfs4_state *state;
1000 if (nd->flags & LOOKUP_CREATE) {
1001 attr.ia_mode = nd->intent.open.create_mode;
1002 attr.ia_valid = ATTR_MODE;
1003 if (!IS_POSIXACL(dir))
1004 attr.ia_mode &= ~current->fs->umask;
1007 BUG_ON(nd->intent.open.flags & O_CREAT);
1010 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1012 return (struct dentry *)cred;
1013 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1015 if (IS_ERR(state)) {
1016 if (PTR_ERR(state) == -ENOENT)
1017 d_add(dentry, NULL);
1018 return (struct dentry *)state;
1020 res = d_add_unique(dentry, state->inode);
1023 nfs4_intent_set_file(nd, dentry, state);
1028 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1030 struct rpc_cred *cred;
1031 struct nfs4_state *state;
1032 struct inode *inode;
1034 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1036 return PTR_ERR(cred);
1037 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1039 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1041 if (IS_ERR(state)) {
1042 switch (PTR_ERR(state)) {
1048 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1051 if (dentry->d_inode == NULL)
1056 inode = state->inode;
1058 if (inode == dentry->d_inode) {
1059 nfs4_intent_set_file(nd, dentry, state);
1062 nfs4_close_state(state, openflags);
1069 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1071 struct nfs4_server_caps_res res = {};
1072 struct rpc_message msg = {
1073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1074 .rpc_argp = fhandle,
1079 status = rpc_call_sync(server->client, &msg, 0);
1081 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1082 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1083 server->caps |= NFS_CAP_ACLS;
1084 if (res.has_links != 0)
1085 server->caps |= NFS_CAP_HARDLINKS;
1086 if (res.has_symlinks != 0)
1087 server->caps |= NFS_CAP_SYMLINKS;
1088 server->acl_bitmask = res.acl_bitmask;
1093 static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1095 struct nfs4_exception exception = { };
1098 err = nfs4_handle_exception(server,
1099 _nfs4_server_capabilities(server, fhandle),
1101 } while (exception.retry);
1105 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1106 struct nfs_fsinfo *info)
1108 struct nfs_fattr * fattr = info->fattr;
1109 struct nfs4_lookup_root_arg args = {
1110 .bitmask = nfs4_fattr_bitmap,
1112 struct nfs4_lookup_res res = {
1117 struct rpc_message msg = {
1118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1123 return rpc_call_sync(server->client, &msg, 0);
1126 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1127 struct nfs_fsinfo *info)
1129 struct nfs4_exception exception = { };
1132 err = nfs4_handle_exception(server,
1133 _nfs4_lookup_root(server, fhandle, info),
1135 } while (exception.retry);
1139 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1140 struct nfs_fsinfo *info)
1142 struct nfs_fattr * fattr = info->fattr;
1145 struct nfs4_lookup_arg args = {
1148 .bitmask = nfs4_fattr_bitmap,
1150 struct nfs4_lookup_res res = {
1155 struct rpc_message msg = {
1156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1163 * Now we do a separate LOOKUP for each component of the mount path.
1164 * The LOOKUPs are done separately so that we can conveniently
1165 * catch an ERR_WRONGSEC if it occurs along the way...
1167 status = nfs4_lookup_root(server, fhandle, info);
1171 p = server->mnt_path;
1173 struct nfs4_exception exception = { };
1180 while (*p && (*p != '/'))
1186 status = nfs4_handle_exception(server,
1187 rpc_call_sync(server->client, &msg, 0),
1189 } while (exception.retry);
1192 if (status == -ENOENT) {
1193 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1194 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1199 status = nfs4_server_capabilities(server, fhandle);
1201 status = nfs4_do_fsinfo(server, fhandle, info);
1206 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1208 struct nfs4_getattr_arg args = {
1210 .bitmask = server->attr_bitmask,
1212 struct nfs4_getattr_res res = {
1216 struct rpc_message msg = {
1217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1223 return rpc_call_sync(server->client, &msg, 0);
1226 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1228 struct nfs4_exception exception = { };
1231 err = nfs4_handle_exception(server,
1232 _nfs4_proc_getattr(server, fhandle, fattr),
1234 } while (exception.retry);
1239 * The file is not closed if it is opened due to the a request to change
1240 * the size of the file. The open call will not be needed once the
1241 * VFS layer lookup-intents are implemented.
1243 * Close is called when the inode is destroyed.
1244 * If we haven't opened the file for O_WRONLY, we
1245 * need to in the size_change case to obtain a stateid.
1248 * Because OPEN is always done by name in nfsv4, it is
1249 * possible that we opened a different file by the same
1250 * name. We can recognize this race condition, but we
1251 * can't do anything about it besides returning an error.
1253 * This will be fixed with VFS changes (lookup-intent).
1256 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1257 struct iattr *sattr)
1259 struct rpc_cred *cred;
1260 struct inode *inode = dentry->d_inode;
1261 struct nfs4_state *state;
1266 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1268 return PTR_ERR(cred);
1269 /* Search for an existing WRITE delegation first */
1270 state = nfs4_open_delegated(inode, FMODE_WRITE, cred);
1271 if (!IS_ERR(state)) {
1272 /* NB: nfs4_open_delegated() bumps the inode->i_count */
1275 /* Search for an existing open(O_WRITE) stateid */
1276 state = nfs4_find_state(inode, cred, FMODE_WRITE);
1279 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1280 NFS_FH(inode), sattr, state);
1282 nfs_setattr_update_inode(inode, sattr);
1284 nfs4_close_state(state, FMODE_WRITE);
1289 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1290 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1293 struct nfs_server *server = NFS_SERVER(dir);
1294 struct nfs4_lookup_arg args = {
1295 .bitmask = server->attr_bitmask,
1296 .dir_fh = NFS_FH(dir),
1299 struct nfs4_lookup_res res = {
1304 struct rpc_message msg = {
1305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1312 dprintk("NFS call lookup %s\n", name->name);
1313 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1314 dprintk("NFS reply lookup: %d\n", status);
1318 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1320 struct nfs4_exception exception = { };
1323 err = nfs4_handle_exception(NFS_SERVER(dir),
1324 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1326 } while (exception.retry);
1330 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1332 struct nfs4_accessargs args = {
1333 .fh = NFS_FH(inode),
1335 struct nfs4_accessres res = { 0 };
1336 struct rpc_message msg = {
1337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1340 .rpc_cred = entry->cred,
1342 int mode = entry->mask;
1346 * Determine which access bits we want to ask for...
1348 if (mode & MAY_READ)
1349 args.access |= NFS4_ACCESS_READ;
1350 if (S_ISDIR(inode->i_mode)) {
1351 if (mode & MAY_WRITE)
1352 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1353 if (mode & MAY_EXEC)
1354 args.access |= NFS4_ACCESS_LOOKUP;
1356 if (mode & MAY_WRITE)
1357 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1358 if (mode & MAY_EXEC)
1359 args.access |= NFS4_ACCESS_EXECUTE;
1361 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1364 if (res.access & NFS4_ACCESS_READ)
1365 entry->mask |= MAY_READ;
1366 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1367 entry->mask |= MAY_WRITE;
1368 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1369 entry->mask |= MAY_EXEC;
1374 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1376 struct nfs4_exception exception = { };
1379 err = nfs4_handle_exception(NFS_SERVER(inode),
1380 _nfs4_proc_access(inode, entry),
1382 } while (exception.retry);
1387 * TODO: For the time being, we don't try to get any attributes
1388 * along with any of the zero-copy operations READ, READDIR,
1391 * In the case of the first three, we want to put the GETATTR
1392 * after the read-type operation -- this is because it is hard
1393 * to predict the length of a GETATTR response in v4, and thus
1394 * align the READ data correctly. This means that the GETATTR
1395 * may end up partially falling into the page cache, and we should
1396 * shift it into the 'tail' of the xdr_buf before processing.
1397 * To do this efficiently, we need to know the total length
1398 * of data received, which doesn't seem to be available outside
1401 * In the case of WRITE, we also want to put the GETATTR after
1402 * the operation -- in this case because we want to make sure
1403 * we get the post-operation mtime and size. This means that
1404 * we can't use xdr_encode_pages() as written: we need a variant
1405 * of it which would leave room in the 'tail' iovec.
1407 * Both of these changes to the XDR layer would in fact be quite
1408 * minor, but I decided to leave them for a subsequent patch.
1410 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1411 unsigned int pgbase, unsigned int pglen)
1413 struct nfs4_readlink args = {
1414 .fh = NFS_FH(inode),
1419 struct rpc_message msg = {
1420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1425 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1428 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1429 unsigned int pgbase, unsigned int pglen)
1431 struct nfs4_exception exception = { };
1434 err = nfs4_handle_exception(NFS_SERVER(inode),
1435 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1437 } while (exception.retry);
1441 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1443 int flags = rdata->flags;
1444 struct inode *inode = rdata->inode;
1445 struct nfs_fattr *fattr = rdata->res.fattr;
1446 struct nfs_server *server = NFS_SERVER(inode);
1447 struct rpc_message msg = {
1448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1449 .rpc_argp = &rdata->args,
1450 .rpc_resp = &rdata->res,
1451 .rpc_cred = rdata->cred,
1453 unsigned long timestamp = jiffies;
1456 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1457 (long long) rdata->args.offset);
1460 status = rpc_call_sync(server->client, &msg, flags);
1462 renew_lease(server, timestamp);
1463 dprintk("NFS reply read: %d\n", status);
1467 static int nfs4_proc_read(struct nfs_read_data *rdata)
1469 struct nfs4_exception exception = { };
1472 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1473 _nfs4_proc_read(rdata),
1475 } while (exception.retry);
1479 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1481 int rpcflags = wdata->flags;
1482 struct inode *inode = wdata->inode;
1483 struct nfs_fattr *fattr = wdata->res.fattr;
1484 struct nfs_server *server = NFS_SERVER(inode);
1485 struct rpc_message msg = {
1486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1487 .rpc_argp = &wdata->args,
1488 .rpc_resp = &wdata->res,
1489 .rpc_cred = wdata->cred,
1493 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1494 (long long) wdata->args.offset);
1497 status = rpc_call_sync(server->client, &msg, rpcflags);
1498 dprintk("NFS reply write: %d\n", status);
1502 static int nfs4_proc_write(struct nfs_write_data *wdata)
1504 struct nfs4_exception exception = { };
1507 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1508 _nfs4_proc_write(wdata),
1510 } while (exception.retry);
1514 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1516 struct inode *inode = cdata->inode;
1517 struct nfs_fattr *fattr = cdata->res.fattr;
1518 struct nfs_server *server = NFS_SERVER(inode);
1519 struct rpc_message msg = {
1520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1521 .rpc_argp = &cdata->args,
1522 .rpc_resp = &cdata->res,
1523 .rpc_cred = cdata->cred,
1527 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1528 (long long) cdata->args.offset);
1531 status = rpc_call_sync(server->client, &msg, 0);
1532 dprintk("NFS reply commit: %d\n", status);
1536 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1538 struct nfs4_exception exception = { };
1541 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1542 _nfs4_proc_commit(cdata),
1544 } while (exception.retry);
1550 * We will need to arrange for the VFS layer to provide an atomic open.
1551 * Until then, this create/open method is prone to inefficiency and race
1552 * conditions due to the lookup, create, and open VFS calls from sys_open()
1553 * placed on the wire.
1555 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1556 * The file will be opened again in the subsequent VFS open call
1557 * (nfs4_proc_file_open).
1559 * The open for read will just hang around to be used by any process that
1560 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1564 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1565 int flags, struct nameidata *nd)
1567 struct nfs4_state *state;
1568 struct rpc_cred *cred;
1571 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1573 status = PTR_ERR(cred);
1576 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1578 if (IS_ERR(state)) {
1579 status = PTR_ERR(state);
1582 d_instantiate(dentry, state->inode);
1583 if (flags & O_EXCL) {
1584 struct nfs_fattr fattr;
1585 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1586 NFS_FH(state->inode), sattr, state);
1588 nfs_setattr_update_inode(state->inode, sattr);
1590 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1591 nfs4_intent_set_file(nd, dentry, state);
1593 nfs4_close_state(state, flags);
1598 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1600 struct nfs4_remove_arg args = {
1604 struct nfs4_change_info res;
1605 struct rpc_message msg = {
1606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1612 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1614 update_changeattr(dir, &res);
1618 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1620 struct nfs4_exception exception = { };
1623 err = nfs4_handle_exception(NFS_SERVER(dir),
1624 _nfs4_proc_remove(dir, name),
1626 } while (exception.retry);
1630 struct unlink_desc {
1631 struct nfs4_remove_arg args;
1632 struct nfs4_change_info res;
1635 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1638 struct unlink_desc *up;
1640 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1644 up->args.fh = NFS_FH(dir->d_inode);
1645 up->args.name = name;
1647 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1648 msg->rpc_argp = &up->args;
1649 msg->rpc_resp = &up->res;
1653 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1655 struct rpc_message *msg = &task->tk_msg;
1656 struct unlink_desc *up;
1658 if (msg->rpc_resp != NULL) {
1659 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1660 update_changeattr(dir->d_inode, &up->res);
1662 msg->rpc_resp = NULL;
1663 msg->rpc_argp = NULL;
1668 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1669 struct inode *new_dir, struct qstr *new_name)
1671 struct nfs4_rename_arg arg = {
1672 .old_dir = NFS_FH(old_dir),
1673 .new_dir = NFS_FH(new_dir),
1674 .old_name = old_name,
1675 .new_name = new_name,
1677 struct nfs4_rename_res res = { };
1678 struct rpc_message msg = {
1679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1685 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
1688 update_changeattr(old_dir, &res.old_cinfo);
1689 update_changeattr(new_dir, &res.new_cinfo);
1694 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1695 struct inode *new_dir, struct qstr *new_name)
1697 struct nfs4_exception exception = { };
1700 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1701 _nfs4_proc_rename(old_dir, old_name,
1704 } while (exception.retry);
1708 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1710 struct nfs4_link_arg arg = {
1711 .fh = NFS_FH(inode),
1712 .dir_fh = NFS_FH(dir),
1715 struct nfs4_change_info cinfo = { };
1716 struct rpc_message msg = {
1717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1723 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1725 update_changeattr(dir, &cinfo);
1730 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1732 struct nfs4_exception exception = { };
1735 err = nfs4_handle_exception(NFS_SERVER(inode),
1736 _nfs4_proc_link(inode, dir, name),
1738 } while (exception.retry);
1742 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1743 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1744 struct nfs_fattr *fattr)
1746 struct nfs_server *server = NFS_SERVER(dir);
1747 struct nfs4_create_arg arg = {
1748 .dir_fh = NFS_FH(dir),
1753 .bitmask = server->attr_bitmask,
1755 struct nfs4_create_res res = {
1760 struct rpc_message msg = {
1761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1767 if (path->len > NFS4_MAXPATHLEN)
1768 return -ENAMETOOLONG;
1769 arg.u.symlink = path;
1772 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1774 update_changeattr(dir, &res.dir_cinfo);
1778 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1779 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1780 struct nfs_fattr *fattr)
1782 struct nfs4_exception exception = { };
1785 err = nfs4_handle_exception(NFS_SERVER(dir),
1786 _nfs4_proc_symlink(dir, name, path, sattr,
1789 } while (exception.retry);
1793 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1794 struct iattr *sattr)
1796 struct nfs_server *server = NFS_SERVER(dir);
1797 struct nfs_fh fhandle;
1798 struct nfs_fattr fattr;
1799 struct nfs4_create_arg arg = {
1800 .dir_fh = NFS_FH(dir),
1802 .name = &dentry->d_name,
1805 .bitmask = server->attr_bitmask,
1807 struct nfs4_create_res res = {
1812 struct rpc_message msg = {
1813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1821 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1823 update_changeattr(dir, &res.dir_cinfo);
1824 status = nfs_instantiate(dentry, &fhandle, &fattr);
1829 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1830 struct iattr *sattr)
1832 struct nfs4_exception exception = { };
1835 err = nfs4_handle_exception(NFS_SERVER(dir),
1836 _nfs4_proc_mkdir(dir, dentry, sattr),
1838 } while (exception.retry);
1842 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1843 u64 cookie, struct page *page, unsigned int count, int plus)
1845 struct inode *dir = dentry->d_inode;
1846 struct nfs4_readdir_arg args = {
1851 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1853 struct nfs4_readdir_res res;
1854 struct rpc_message msg = {
1855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
1862 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
1863 dentry->d_parent->d_name.name,
1864 dentry->d_name.name,
1865 (unsigned long long)cookie);
1867 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
1868 res.pgbase = args.pgbase;
1869 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1871 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
1873 dprintk("%s: returns %d\n", __FUNCTION__, status);
1877 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1878 u64 cookie, struct page *page, unsigned int count, int plus)
1880 struct nfs4_exception exception = { };
1883 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
1884 _nfs4_proc_readdir(dentry, cred, cookie,
1887 } while (exception.retry);
1891 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1892 struct iattr *sattr, dev_t rdev)
1894 struct nfs_server *server = NFS_SERVER(dir);
1896 struct nfs_fattr fattr;
1897 struct nfs4_create_arg arg = {
1898 .dir_fh = NFS_FH(dir),
1900 .name = &dentry->d_name,
1902 .bitmask = server->attr_bitmask,
1904 struct nfs4_create_res res = {
1909 struct rpc_message msg = {
1910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1915 int mode = sattr->ia_mode;
1919 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
1920 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
1922 arg.ftype = NF4FIFO;
1923 else if (S_ISBLK(mode)) {
1925 arg.u.device.specdata1 = MAJOR(rdev);
1926 arg.u.device.specdata2 = MINOR(rdev);
1928 else if (S_ISCHR(mode)) {
1930 arg.u.device.specdata1 = MAJOR(rdev);
1931 arg.u.device.specdata2 = MINOR(rdev);
1934 arg.ftype = NF4SOCK;
1936 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1938 update_changeattr(dir, &res.dir_cinfo);
1939 status = nfs_instantiate(dentry, &fh, &fattr);
1944 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1945 struct iattr *sattr, dev_t rdev)
1947 struct nfs4_exception exception = { };
1950 err = nfs4_handle_exception(NFS_SERVER(dir),
1951 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
1953 } while (exception.retry);
1957 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
1958 struct nfs_fsstat *fsstat)
1960 struct nfs4_statfs_arg args = {
1962 .bitmask = server->attr_bitmask,
1964 struct rpc_message msg = {
1965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
1970 fsstat->fattr->valid = 0;
1971 return rpc_call_sync(server->client, &msg, 0);
1974 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
1976 struct nfs4_exception exception = { };
1979 err = nfs4_handle_exception(server,
1980 _nfs4_proc_statfs(server, fhandle, fsstat),
1982 } while (exception.retry);
1986 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
1987 struct nfs_fsinfo *fsinfo)
1989 struct nfs4_fsinfo_arg args = {
1991 .bitmask = server->attr_bitmask,
1993 struct rpc_message msg = {
1994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
1999 return rpc_call_sync(server->client, &msg, 0);
2002 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2004 struct nfs4_exception exception = { };
2008 err = nfs4_handle_exception(server,
2009 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2011 } while (exception.retry);
2015 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2017 fsinfo->fattr->valid = 0;
2018 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2021 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2022 struct nfs_pathconf *pathconf)
2024 struct nfs4_pathconf_arg args = {
2026 .bitmask = server->attr_bitmask,
2028 struct rpc_message msg = {
2029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2031 .rpc_resp = pathconf,
2034 /* None of the pathconf attributes are mandatory to implement */
2035 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2036 memset(pathconf, 0, sizeof(*pathconf));
2040 pathconf->fattr->valid = 0;
2041 return rpc_call_sync(server->client, &msg, 0);
2044 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2045 struct nfs_pathconf *pathconf)
2047 struct nfs4_exception exception = { };
2051 err = nfs4_handle_exception(server,
2052 _nfs4_proc_pathconf(server, fhandle, pathconf),
2054 } while (exception.retry);
2059 nfs4_read_done(struct rpc_task *task)
2061 struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
2062 struct inode *inode = data->inode;
2064 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2065 rpc_restart_call(task);
2068 if (task->tk_status > 0)
2069 renew_lease(NFS_SERVER(inode), data->timestamp);
2070 /* Call back common NFS readpage processing */
2071 nfs_readpage_result(task);
2075 nfs4_proc_read_setup(struct nfs_read_data *data)
2077 struct rpc_task *task = &data->task;
2078 struct rpc_message msg = {
2079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2080 .rpc_argp = &data->args,
2081 .rpc_resp = &data->res,
2082 .rpc_cred = data->cred,
2084 struct inode *inode = data->inode;
2087 data->timestamp = jiffies;
2089 /* N.B. Do we need to test? Never called for swapfile inode */
2090 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
2092 /* Finalize the task. */
2093 rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
2094 rpc_call_setup(task, &msg, 0);
2098 nfs4_write_done(struct rpc_task *task)
2100 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2101 struct inode *inode = data->inode;
2103 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2104 rpc_restart_call(task);
2107 if (task->tk_status >= 0)
2108 renew_lease(NFS_SERVER(inode), data->timestamp);
2109 /* Call back common NFS writeback processing */
2110 nfs_writeback_done(task);
2114 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2116 struct rpc_task *task = &data->task;
2117 struct rpc_message msg = {
2118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2119 .rpc_argp = &data->args,
2120 .rpc_resp = &data->res,
2121 .rpc_cred = data->cred,
2123 struct inode *inode = data->inode;
2127 if (how & FLUSH_STABLE) {
2128 if (!NFS_I(inode)->ncommit)
2129 stable = NFS_FILE_SYNC;
2131 stable = NFS_DATA_SYNC;
2133 stable = NFS_UNSTABLE;
2134 data->args.stable = stable;
2136 data->timestamp = jiffies;
2138 /* Set the initial flags for the task. */
2139 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2141 /* Finalize the task. */
2142 rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
2143 rpc_call_setup(task, &msg, 0);
2147 nfs4_commit_done(struct rpc_task *task)
2149 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2150 struct inode *inode = data->inode;
2152 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2153 rpc_restart_call(task);
2156 /* Call back common NFS writeback processing */
2157 nfs_commit_done(task);
2161 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2163 struct rpc_task *task = &data->task;
2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2166 .rpc_argp = &data->args,
2167 .rpc_resp = &data->res,
2168 .rpc_cred = data->cred,
2170 struct inode *inode = data->inode;
2173 /* Set the initial flags for the task. */
2174 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2176 /* Finalize the task. */
2177 rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
2178 rpc_call_setup(task, &msg, 0);
2182 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2183 * standalone procedure for queueing an asynchronous RENEW.
2186 renew_done(struct rpc_task *task)
2188 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
2189 unsigned long timestamp = (unsigned long)task->tk_calldata;
2191 if (task->tk_status < 0) {
2192 switch (task->tk_status) {
2193 case -NFS4ERR_STALE_CLIENTID:
2194 case -NFS4ERR_EXPIRED:
2195 case -NFS4ERR_CB_PATH_DOWN:
2196 nfs4_schedule_state_recovery(clp);
2200 spin_lock(&clp->cl_lock);
2201 if (time_before(clp->cl_last_renewal,timestamp))
2202 clp->cl_last_renewal = timestamp;
2203 spin_unlock(&clp->cl_lock);
2207 nfs4_proc_async_renew(struct nfs4_client *clp)
2209 struct rpc_message msg = {
2210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2212 .rpc_cred = clp->cl_cred,
2215 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2216 renew_done, (void *)jiffies);
2220 nfs4_proc_renew(struct nfs4_client *clp)
2222 struct rpc_message msg = {
2223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2225 .rpc_cred = clp->cl_cred,
2227 unsigned long now = jiffies;
2230 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2233 spin_lock(&clp->cl_lock);
2234 if (time_before(clp->cl_last_renewal,now))
2235 clp->cl_last_renewal = now;
2236 spin_unlock(&clp->cl_lock);
2240 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2242 return (server->caps & NFS_CAP_ACLS)
2243 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2244 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2247 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2248 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2251 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2253 static void buf_to_pages(const void *buf, size_t buflen,
2254 struct page **pages, unsigned int *pgbase)
2256 const void *p = buf;
2258 *pgbase = offset_in_page(buf);
2260 while (p < buf + buflen) {
2261 *(pages++) = virt_to_page(p);
2262 p += PAGE_CACHE_SIZE;
2266 struct nfs4_cached_acl {
2272 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2274 struct nfs_inode *nfsi = NFS_I(inode);
2276 spin_lock(&inode->i_lock);
2277 kfree(nfsi->nfs4_acl);
2278 nfsi->nfs4_acl = acl;
2279 spin_unlock(&inode->i_lock);
2282 static void nfs4_zap_acl_attr(struct inode *inode)
2284 nfs4_set_cached_acl(inode, NULL);
2287 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2289 struct nfs_inode *nfsi = NFS_I(inode);
2290 struct nfs4_cached_acl *acl;
2293 spin_lock(&inode->i_lock);
2294 acl = nfsi->nfs4_acl;
2297 if (buf == NULL) /* user is just asking for length */
2299 if (acl->cached == 0)
2301 ret = -ERANGE; /* see getxattr(2) man page */
2302 if (acl->len > buflen)
2304 memcpy(buf, acl->data, acl->len);
2308 spin_unlock(&inode->i_lock);
2312 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2314 struct nfs4_cached_acl *acl;
2316 if (buf && acl_len <= PAGE_SIZE) {
2317 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2321 memcpy(acl->data, buf, acl_len);
2323 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2330 nfs4_set_cached_acl(inode, acl);
2333 static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2335 struct page *pages[NFS4ACL_MAXPAGES];
2336 struct nfs_getaclargs args = {
2337 .fh = NFS_FH(inode),
2341 size_t resp_len = buflen;
2343 struct rpc_message msg = {
2344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2346 .rpc_resp = &resp_len,
2348 struct page *localpage = NULL;
2351 if (buflen < PAGE_SIZE) {
2352 /* As long as we're doing a round trip to the server anyway,
2353 * let's be prepared for a page of acl data. */
2354 localpage = alloc_page(GFP_KERNEL);
2355 resp_buf = page_address(localpage);
2356 if (localpage == NULL)
2358 args.acl_pages[0] = localpage;
2359 args.acl_pgbase = 0;
2360 args.acl_len = PAGE_SIZE;
2363 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2365 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2368 if (resp_len > args.acl_len)
2369 nfs4_write_cached_acl(inode, NULL, resp_len);
2371 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2374 if (resp_len > buflen)
2377 memcpy(buf, resp_buf, resp_len);
2382 __free_page(localpage);
2386 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2388 struct nfs_server *server = NFS_SERVER(inode);
2391 if (!nfs4_server_supports_acls(server))
2393 ret = nfs_revalidate_inode(server, inode);
2396 ret = nfs4_read_cached_acl(inode, buf, buflen);
2399 return nfs4_get_acl_uncached(inode, buf, buflen);
2402 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2404 struct nfs_server *server = NFS_SERVER(inode);
2405 struct page *pages[NFS4ACL_MAXPAGES];
2406 struct nfs_setaclargs arg = {
2407 .fh = NFS_FH(inode),
2411 struct rpc_message msg = {
2412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2418 if (!nfs4_server_supports_acls(server))
2420 nfs_inode_return_delegation(inode);
2421 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2422 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
2424 nfs4_write_cached_acl(inode, buf, buflen);
2429 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2431 struct nfs4_client *clp = server->nfs4_state;
2433 if (!clp || task->tk_status >= 0)
2435 switch(task->tk_status) {
2436 case -NFS4ERR_STALE_CLIENTID:
2437 case -NFS4ERR_STALE_STATEID:
2438 case -NFS4ERR_EXPIRED:
2439 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2440 nfs4_schedule_state_recovery(clp);
2441 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2442 rpc_wake_up_task(task);
2443 task->tk_status = 0;
2445 case -NFS4ERR_GRACE:
2446 case -NFS4ERR_DELAY:
2447 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2448 task->tk_status = 0;
2450 case -NFS4ERR_OLD_STATEID:
2451 task->tk_status = 0;
2454 task->tk_status = nfs4_map_errors(task->tk_status);
2458 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2462 int interruptible, res = 0;
2466 rpc_clnt_sigmask(clnt, &oldset);
2467 interruptible = TASK_UNINTERRUPTIBLE;
2469 interruptible = TASK_INTERRUPTIBLE;
2470 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2471 nfs4_schedule_state_recovery(clp);
2472 if (clnt->cl_intr && signalled())
2474 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2476 finish_wait(&clp->cl_waitq, &wait);
2477 rpc_clnt_sigunmask(clnt, &oldset);
2481 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2489 *timeout = NFS4_POLL_RETRY_MIN;
2490 if (*timeout > NFS4_POLL_RETRY_MAX)
2491 *timeout = NFS4_POLL_RETRY_MAX;
2492 rpc_clnt_sigmask(clnt, &oldset);
2493 if (clnt->cl_intr) {
2494 schedule_timeout_interruptible(*timeout);
2498 schedule_timeout_uninterruptible(*timeout);
2499 rpc_clnt_sigunmask(clnt, &oldset);
2504 /* This is the error handling routine for processes that are allowed
2507 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2509 struct nfs4_client *clp = server->nfs4_state;
2510 int ret = errorcode;
2512 exception->retry = 0;
2516 case -NFS4ERR_STALE_CLIENTID:
2517 case -NFS4ERR_STALE_STATEID:
2518 case -NFS4ERR_EXPIRED:
2519 ret = nfs4_wait_clnt_recover(server->client, clp);
2521 exception->retry = 1;
2523 case -NFS4ERR_GRACE:
2524 case -NFS4ERR_DELAY:
2525 ret = nfs4_delay(server->client, &exception->timeout);
2527 exception->retry = 1;
2529 case -NFS4ERR_OLD_STATEID:
2531 exception->retry = 1;
2533 /* We failed to handle the error */
2534 return nfs4_map_errors(ret);
2537 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2539 nfs4_verifier sc_verifier;
2540 struct nfs4_setclientid setclientid = {
2541 .sc_verifier = &sc_verifier,
2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2546 .rpc_argp = &setclientid,
2548 .rpc_cred = clp->cl_cred,
2554 p = (u32*)sc_verifier.data;
2555 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2556 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2559 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2560 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2561 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2562 clp->cl_cred->cr_ops->cr_name,
2563 clp->cl_id_uniquifier);
2564 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2565 sizeof(setclientid.sc_netid), "tcp");
2566 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2567 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2568 clp->cl_ipaddr, port >> 8, port & 255);
2570 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2571 if (status != -NFS4ERR_CLID_INUSE)
2576 ssleep(clp->cl_lease_time + 1);
2578 if (++clp->cl_id_uniquifier == 0)
2585 nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2587 struct nfs_fsinfo fsinfo;
2588 struct rpc_message msg = {
2589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2591 .rpc_resp = &fsinfo,
2592 .rpc_cred = clp->cl_cred,
2598 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2600 spin_lock(&clp->cl_lock);
2601 clp->cl_lease_time = fsinfo.lease_time * HZ;
2602 clp->cl_last_renewal = now;
2603 spin_unlock(&clp->cl_lock);
2608 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2610 struct nfs4_delegreturnargs args = {
2611 .fhandle = NFS_FH(inode),
2614 struct rpc_message msg = {
2615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2620 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2623 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2625 struct nfs_server *server = NFS_SERVER(inode);
2626 struct nfs4_exception exception = { };
2629 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2631 case -NFS4ERR_STALE_STATEID:
2632 case -NFS4ERR_EXPIRED:
2633 nfs4_schedule_state_recovery(server->nfs4_state);
2637 err = nfs4_handle_exception(server, err, &exception);
2638 } while (exception.retry);
2642 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2643 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2646 * sleep, with exponential backoff, and retry the LOCK operation.
2648 static unsigned long
2649 nfs4_set_lock_task_retry(unsigned long timeout)
2651 schedule_timeout_interruptible(timeout);
2653 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2654 return NFS4_LOCK_MAXTIMEOUT;
2659 nfs4_lck_type(int cmd, struct file_lock *request)
2662 switch (request->fl_type) {
2664 return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
2666 return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
2668 return NFS4_WRITE_LT;
2674 static inline uint64_t
2675 nfs4_lck_length(struct file_lock *request)
2677 if (request->fl_end == OFFSET_MAX)
2678 return ~(uint64_t)0;
2679 return request->fl_end - request->fl_start + 1;
2682 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2684 struct inode *inode = state->inode;
2685 struct nfs_server *server = NFS_SERVER(inode);
2686 struct nfs4_client *clp = server->nfs4_state;
2687 struct nfs_lockargs arg = {
2688 .fh = NFS_FH(inode),
2689 .type = nfs4_lck_type(cmd, request),
2690 .offset = request->fl_start,
2691 .length = nfs4_lck_length(request),
2693 struct nfs_lockres res = {
2696 struct rpc_message msg = {
2697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2700 .rpc_cred = state->owner->so_cred,
2702 struct nfs_lowner nlo;
2703 struct nfs4_lock_state *lsp;
2706 down_read(&clp->cl_sem);
2707 nlo.clientid = clp->cl_clientid;
2708 status = nfs4_set_lock_state(state, request);
2711 lsp = request->fl_u.nfs4_fl.owner;
2712 nlo.id = lsp->ls_id;
2714 status = rpc_call_sync(server->client, &msg, 0);
2716 request->fl_type = F_UNLCK;
2717 } else if (status == -NFS4ERR_DENIED) {
2718 int64_t len, start, end;
2719 start = res.u.denied.offset;
2720 len = res.u.denied.length;
2721 end = start + len - 1;
2722 if (end < 0 || len == 0)
2723 request->fl_end = OFFSET_MAX;
2725 request->fl_end = (loff_t)end;
2726 request->fl_start = (loff_t)start;
2727 request->fl_type = F_WRLCK;
2728 if (res.u.denied.type & 1)
2729 request->fl_type = F_RDLCK;
2730 request->fl_pid = 0;
2734 up_read(&clp->cl_sem);
2738 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2740 struct nfs4_exception exception = { };
2744 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2745 _nfs4_proc_getlk(state, cmd, request),
2747 } while (exception.retry);
2751 static int do_vfs_lock(struct file *file, struct file_lock *fl)
2754 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
2756 res = posix_lock_file_wait(file, fl);
2759 res = flock_lock_file_wait(file, fl);
2765 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
2770 struct nfs4_unlockdata {
2771 struct nfs_lockargs arg;
2772 struct nfs_locku_opargs luargs;
2773 struct nfs_lockres res;
2774 struct nfs4_lock_state *lsp;
2775 struct nfs_open_context *ctx;
2777 struct completion completion;
2780 static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata)
2782 if (atomic_dec_and_test(&calldata->refcount)) {
2783 nfs_free_seqid(calldata->luargs.seqid);
2784 nfs4_put_lock_state(calldata->lsp);
2785 put_nfs_open_context(calldata->ctx);
2790 static void nfs4_locku_complete(struct nfs4_unlockdata *calldata)
2792 complete(&calldata->completion);
2793 nfs4_locku_release_calldata(calldata);
2796 static void nfs4_locku_done(struct rpc_task *task)
2798 struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
2800 nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid);
2801 switch (task->tk_status) {
2803 memcpy(calldata->lsp->ls_stateid.data,
2804 calldata->res.u.stateid.data,
2805 sizeof(calldata->lsp->ls_stateid.data));
2807 case -NFS4ERR_STALE_STATEID:
2808 case -NFS4ERR_EXPIRED:
2809 nfs4_schedule_state_recovery(calldata->res.server->nfs4_state);
2812 if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) {
2813 rpc_restart_call(task);
2817 nfs4_locku_complete(calldata);
2820 static void nfs4_locku_begin(struct rpc_task *task)
2822 struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
2823 struct rpc_message msg = {
2824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
2825 .rpc_argp = &calldata->arg,
2826 .rpc_resp = &calldata->res,
2827 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
2831 status = nfs_wait_on_sequence(calldata->luargs.seqid, task);
2834 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
2835 nfs4_locku_complete(calldata);
2836 task->tk_exit = NULL;
2840 rpc_call_setup(task, &msg, 0);
2843 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2845 struct nfs4_unlockdata *calldata;
2846 struct inode *inode = state->inode;
2847 struct nfs_server *server = NFS_SERVER(inode);
2848 struct nfs4_lock_state *lsp;
2851 status = nfs4_set_lock_state(state, request);
2854 lsp = request->fl_u.nfs4_fl.owner;
2855 /* We might have lost the locks! */
2856 if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0)
2858 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
2859 if (calldata == NULL)
2861 calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid);
2862 if (calldata->luargs.seqid == NULL) {
2866 calldata->luargs.stateid = &lsp->ls_stateid;
2867 calldata->arg.fh = NFS_FH(inode);
2868 calldata->arg.type = nfs4_lck_type(cmd, request);
2869 calldata->arg.offset = request->fl_start;
2870 calldata->arg.length = nfs4_lck_length(request);
2871 calldata->arg.u.locku = &calldata->luargs;
2872 calldata->res.server = server;
2873 calldata->lsp = lsp;
2874 atomic_inc(&lsp->ls_count);
2876 /* Ensure we don't close file until we're done freeing locks! */
2877 calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data);
2879 atomic_set(&calldata->refcount, 2);
2880 init_completion(&calldata->completion);
2882 status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin,
2883 nfs4_locku_done, calldata);
2885 wait_for_completion_interruptible(&calldata->completion);
2886 do_vfs_lock(request->fl_file, request);
2887 nfs4_locku_release_calldata(calldata);
2891 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
2893 struct inode *inode = state->inode;
2894 struct nfs_server *server = NFS_SERVER(inode);
2895 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
2896 struct nfs_lock_opargs largs = {
2897 .lock_stateid = &lsp->ls_stateid,
2898 .open_stateid = &state->stateid,
2900 .clientid = server->nfs4_state->cl_clientid,
2905 struct nfs_lockargs arg = {
2906 .fh = NFS_FH(inode),
2907 .type = nfs4_lck_type(cmd, request),
2908 .offset = request->fl_start,
2909 .length = nfs4_lck_length(request),
2914 struct nfs_lockres res = {
2917 struct rpc_message msg = {
2918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
2921 .rpc_cred = state->owner->so_cred,
2923 int status = -ENOMEM;
2925 largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
2926 if (largs.lock_seqid == NULL)
2928 if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) {
2929 struct nfs4_state_owner *owner = state->owner;
2931 largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid);
2932 if (largs.open_seqid == NULL)
2934 largs.new_lock_owner = 1;
2935 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2936 /* increment open seqid on success, and seqid mutating errors */
2937 if (largs.new_lock_owner != 0) {
2938 nfs_increment_open_seqid(status, largs.open_seqid);
2940 nfs_confirm_seqid(&lsp->ls_seqid, 0);
2942 nfs_free_seqid(largs.open_seqid);
2944 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2945 /* increment lock seqid on success, and seqid mutating errors*/
2946 nfs_increment_lock_seqid(status, largs.lock_seqid);
2947 /* save the returned stateid. */
2949 memcpy(lsp->ls_stateid.data, res.u.stateid.data,
2950 sizeof(lsp->ls_stateid.data));
2951 lsp->ls_flags |= NFS_LOCK_INITIALIZED;
2952 } else if (status == -NFS4ERR_DENIED)
2955 nfs_free_seqid(largs.lock_seqid);
2959 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
2961 struct nfs_server *server = NFS_SERVER(state->inode);
2962 struct nfs4_exception exception = { };
2966 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
2967 if (err != -NFS4ERR_DELAY)
2969 nfs4_handle_exception(server, err, &exception);
2970 } while (exception.retry);
2974 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
2976 struct nfs_server *server = NFS_SERVER(state->inode);
2977 struct nfs4_exception exception = { };
2981 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
2982 if (err != -NFS4ERR_DELAY)
2984 nfs4_handle_exception(server, err, &exception);
2985 } while (exception.retry);
2989 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2991 struct nfs4_client *clp = state->owner->so_client;
2994 down_read(&clp->cl_sem);
2995 status = nfs4_set_lock_state(state, request);
2997 status = _nfs4_do_setlk(state, cmd, request, 0);
2999 /* Note: we always want to sleep here! */
3000 request->fl_flags |= FL_SLEEP;
3001 if (do_vfs_lock(request->fl_file, request) < 0)
3002 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3004 up_read(&clp->cl_sem);
3008 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3010 struct nfs4_exception exception = { };
3014 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3015 _nfs4_proc_setlk(state, cmd, request),
3017 } while (exception.retry);
3022 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3024 struct nfs_open_context *ctx;
3025 struct nfs4_state *state;
3026 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3029 /* verify open state */
3030 ctx = (struct nfs_open_context *)filp->private_data;
3033 if (request->fl_start < 0 || request->fl_end < 0)
3037 return nfs4_proc_getlk(state, F_GETLK, request);
3039 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3042 if (request->fl_type == F_UNLCK)
3043 return nfs4_proc_unlck(state, cmd, request);
3046 status = nfs4_proc_setlk(state, cmd, request);
3047 if ((status != -EAGAIN) || IS_SETLK(cmd))
3049 timeout = nfs4_set_lock_task_retry(timeout);
3050 status = -ERESTARTSYS;
3053 } while(status < 0);
3058 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3060 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3061 size_t buflen, int flags)
3063 struct inode *inode = dentry->d_inode;
3065 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3068 if (!S_ISREG(inode->i_mode) &&
3069 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3072 return nfs4_proc_set_acl(inode, buf, buflen);
3075 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3076 * and that's what we'll do for e.g. user attributes that haven't been set.
3077 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3078 * attributes in kernel-managed attribute namespaces. */
3079 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3082 struct inode *inode = dentry->d_inode;
3084 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3087 return nfs4_proc_get_acl(inode, buf, buflen);
3090 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3092 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3094 if (buf && buflen < len)
3097 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3101 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3102 .recover_open = nfs4_open_reclaim,
3103 .recover_lock = nfs4_lock_reclaim,
3106 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3107 .recover_open = nfs4_open_expired,
3108 .recover_lock = nfs4_lock_expired,
3111 static struct inode_operations nfs4_file_inode_operations = {
3112 .permission = nfs_permission,
3113 .getattr = nfs_getattr,
3114 .setattr = nfs_setattr,
3115 .getxattr = nfs4_getxattr,
3116 .setxattr = nfs4_setxattr,
3117 .listxattr = nfs4_listxattr,
3120 struct nfs_rpc_ops nfs_v4_clientops = {
3121 .version = 4, /* protocol version */
3122 .dentry_ops = &nfs4_dentry_operations,
3123 .dir_inode_ops = &nfs4_dir_inode_operations,
3124 .file_inode_ops = &nfs4_file_inode_operations,
3125 .getroot = nfs4_proc_get_root,
3126 .getattr = nfs4_proc_getattr,
3127 .setattr = nfs4_proc_setattr,
3128 .lookup = nfs4_proc_lookup,
3129 .access = nfs4_proc_access,
3130 .readlink = nfs4_proc_readlink,
3131 .read = nfs4_proc_read,
3132 .write = nfs4_proc_write,
3133 .commit = nfs4_proc_commit,
3134 .create = nfs4_proc_create,
3135 .remove = nfs4_proc_remove,
3136 .unlink_setup = nfs4_proc_unlink_setup,
3137 .unlink_done = nfs4_proc_unlink_done,
3138 .rename = nfs4_proc_rename,
3139 .link = nfs4_proc_link,
3140 .symlink = nfs4_proc_symlink,
3141 .mkdir = nfs4_proc_mkdir,
3142 .rmdir = nfs4_proc_remove,
3143 .readdir = nfs4_proc_readdir,
3144 .mknod = nfs4_proc_mknod,
3145 .statfs = nfs4_proc_statfs,
3146 .fsinfo = nfs4_proc_fsinfo,
3147 .pathconf = nfs4_proc_pathconf,
3148 .decode_dirent = nfs4_decode_dirent,
3149 .read_setup = nfs4_proc_read_setup,
3150 .write_setup = nfs4_proc_write_setup,
3151 .commit_setup = nfs4_proc_commit_setup,
3152 .file_open = nfs_open,
3153 .file_release = nfs_release,
3154 .lock = nfs4_proc_lock,
3155 .clear_acl_cache = nfs4_zap_acl_attr,