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 spin_lock(&inode->i_lock);
191 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
192 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
193 nfsi->change_attr = cinfo->after;
194 spin_unlock(&inode->i_lock);
197 /* Helper for asynchronous RPC calls */
198 static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
199 rpc_action tk_exit, void *calldata)
201 struct rpc_task *task;
203 if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
206 task->tk_calldata = calldata;
207 task->tk_action = tk_begin;
212 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
214 struct inode *inode = state->inode;
216 open_flags &= (FMODE_READ|FMODE_WRITE);
217 /* Protect against nfs4_find_state() */
218 spin_lock(&state->owner->so_lock);
219 spin_lock(&inode->i_lock);
220 state->state |= open_flags;
221 /* NB! List reordering - see the reclaim code for why. */
222 if ((open_flags & FMODE_WRITE) && 0 == state->nwriters++)
223 list_move(&state->open_states, &state->owner->so_states);
224 if (open_flags & FMODE_READ)
226 memcpy(&state->stateid, stateid, sizeof(state->stateid));
227 spin_unlock(&inode->i_lock);
228 spin_unlock(&state->owner->so_lock);
233 * reclaim state on the server after a reboot.
235 static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
237 struct inode *inode = state->inode;
238 struct nfs_server *server = NFS_SERVER(inode);
239 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
240 struct nfs_openargs o_arg = {
243 .open_flags = state->state,
244 .clientid = server->nfs4_state->cl_clientid,
245 .claim = NFS4_OPEN_CLAIM_PREVIOUS,
246 .bitmask = server->attr_bitmask,
248 struct nfs_openres o_res = {
249 .server = server, /* Grrr */
251 struct rpc_message msg = {
252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
255 .rpc_cred = sp->so_cred,
259 if (delegation != NULL) {
260 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
261 memcpy(&state->stateid, &delegation->stateid,
262 sizeof(state->stateid));
263 set_bit(NFS_DELEGATED_STATE, &state->flags);
266 o_arg.u.delegation_type = delegation->type;
268 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
269 if (o_arg.seqid == NULL)
271 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
272 /* Confirm the sequence as being established */
273 nfs_confirm_seqid(&sp->so_seqid, status);
274 nfs_increment_open_seqid(status, o_arg.seqid);
276 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
277 if (o_res.delegation_type != 0) {
278 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
279 /* Did the server issue an immediate delegation recall? */
281 nfs_async_inode_return_delegation(inode, &o_res.stateid);
284 nfs_free_seqid(o_arg.seqid);
285 clear_bit(NFS_DELEGATED_STATE, &state->flags);
286 /* Ensure we update the inode attributes */
291 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
293 struct nfs_server *server = NFS_SERVER(state->inode);
294 struct nfs4_exception exception = { };
297 err = _nfs4_open_reclaim(sp, state);
298 if (err != -NFS4ERR_DELAY)
300 nfs4_handle_exception(server, err, &exception);
301 } while (exception.retry);
305 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
307 struct nfs4_state_owner *sp = state->owner;
308 struct inode *inode = dentry->d_inode;
309 struct nfs_server *server = NFS_SERVER(inode);
310 struct dentry *parent = dget_parent(dentry);
311 struct nfs_openargs arg = {
312 .fh = NFS_FH(parent->d_inode),
313 .clientid = server->nfs4_state->cl_clientid,
314 .name = &dentry->d_name,
317 .bitmask = server->attr_bitmask,
318 .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
320 struct nfs_openres res = {
323 struct rpc_message msg = {
324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
327 .rpc_cred = sp->so_cred,
331 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
333 if (state->state == 0)
335 arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
337 if (arg.seqid == NULL)
339 arg.open_flags = state->state;
340 memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
341 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
342 nfs_increment_open_seqid(status, arg.seqid);
345 if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
346 status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode),
347 sp, &res.stateid, arg.seqid);
351 nfs_confirm_seqid(&sp->so_seqid, 0);
353 memcpy(state->stateid.data, res.stateid.data,
354 sizeof(state->stateid.data));
355 clear_bit(NFS_DELEGATED_STATE, &state->flags);
358 nfs_free_seqid(arg.seqid);
364 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
366 struct nfs4_exception exception = { };
367 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
370 err = _nfs4_open_delegation_recall(dentry, state);
374 case -NFS4ERR_STALE_CLIENTID:
375 case -NFS4ERR_STALE_STATEID:
376 case -NFS4ERR_EXPIRED:
377 /* Don't recall a delegation if it was lost */
378 nfs4_schedule_state_recovery(server->nfs4_state);
381 err = nfs4_handle_exception(server, err, &exception);
382 } while (exception.retry);
386 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)
388 struct nfs_open_confirmargs arg = {
393 struct nfs_open_confirmres res;
394 struct rpc_message msg = {
395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
398 .rpc_cred = sp->so_cred,
402 status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
403 /* Confirm the sequence as being established */
404 nfs_confirm_seqid(&sp->so_seqid, status);
405 nfs_increment_open_seqid(status, seqid);
407 memcpy(stateid, &res.stateid, sizeof(*stateid));
411 static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res)
413 struct nfs_server *server = NFS_SERVER(dir);
414 struct rpc_message msg = {
415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
418 .rpc_cred = sp->so_cred,
422 /* Update sequence id. The caller must serialize! */
423 o_arg->id = sp->so_id;
424 o_arg->clientid = sp->so_client->cl_clientid;
426 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
428 /* OPEN on anything except a regular file is disallowed in NFSv4 */
429 switch (o_res->f_attr->mode & S_IFMT) {
443 nfs_increment_open_seqid(status, o_arg->seqid);
446 if (o_arg->open_flags & O_CREAT) {
447 update_changeattr(dir, &o_res->cinfo);
448 nfs_post_op_update_inode(dir, o_res->dir_attr);
450 nfs_refresh_inode(dir, o_res->dir_attr);
451 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
452 status = _nfs4_proc_open_confirm(server->client, &o_res->fh,
453 sp, &o_res->stateid, o_arg->seqid);
457 nfs_confirm_seqid(&sp->so_seqid, 0);
458 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
459 status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
464 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
466 struct nfs_access_entry cache;
470 if (openflags & FMODE_READ)
472 if (openflags & FMODE_WRITE)
474 status = nfs_access_get_cached(inode, cred, &cache);
478 /* Be clever: ask server to check for all possible rights */
479 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
481 cache.jiffies = jiffies;
482 status = _nfs4_proc_access(inode, &cache);
485 nfs_access_add_cache(inode, &cache);
487 if ((cache.mask & mask) == mask)
494 * reclaim state on the server after a network partition.
495 * Assumes caller holds the appropriate lock
497 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
499 struct dentry *parent = dget_parent(dentry);
500 struct inode *dir = parent->d_inode;
501 struct inode *inode = state->inode;
502 struct nfs_server *server = NFS_SERVER(dir);
503 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
504 struct nfs_fattr f_attr, dir_attr;
505 struct nfs_openargs o_arg = {
507 .open_flags = state->state,
508 .name = &dentry->d_name,
509 .bitmask = server->attr_bitmask,
510 .claim = NFS4_OPEN_CLAIM_NULL,
512 struct nfs_openres o_res = {
514 .dir_attr = &dir_attr,
519 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
520 status = _nfs4_do_access(inode, sp->so_cred, state->state);
523 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
524 set_bit(NFS_DELEGATED_STATE, &state->flags);
527 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
529 if (o_arg.seqid == NULL)
531 nfs_fattr_init(&f_attr);
532 nfs_fattr_init(&dir_attr);
533 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
536 /* Check if files differ */
537 if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
539 /* Has the file handle changed? */
540 if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) {
541 /* Verify if the change attributes are the same */
542 if (f_attr.change_attr != NFS_I(inode)->change_attr)
544 if (nfs_size_to_loff_t(f_attr.size) != inode->i_size)
546 /* Lets just pretend that this is the same file */
547 nfs_copy_fh(NFS_FH(inode), &o_res.fh);
548 NFS_I(inode)->fileid = f_attr.fileid;
550 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
551 if (o_res.delegation_type != 0) {
552 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
553 nfs_inode_set_delegation(inode, sp->so_cred, &o_res);
555 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
558 nfs_free_seqid(o_arg.seqid);
559 clear_bit(NFS_DELEGATED_STATE, &state->flags);
565 /* Invalidate the state owner so we don't ever use it again */
566 nfs4_drop_state_owner(sp);
568 /* Should we be trying to close that stateid? */
572 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
574 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
575 struct nfs4_exception exception = { };
579 err = _nfs4_open_expired(sp, state, dentry);
580 if (err == -NFS4ERR_DELAY)
581 nfs4_handle_exception(server, err, &exception);
582 } while (exception.retry);
586 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
588 struct nfs_inode *nfsi = NFS_I(state->inode);
589 struct nfs_open_context *ctx;
592 spin_lock(&state->inode->i_lock);
593 list_for_each_entry(ctx, &nfsi->open_files, list) {
594 if (ctx->state != state)
596 get_nfs_open_context(ctx);
597 spin_unlock(&state->inode->i_lock);
598 status = nfs4_do_open_expired(sp, state, ctx->dentry);
599 put_nfs_open_context(ctx);
602 spin_unlock(&state->inode->i_lock);
607 * Returns an nfs4_state + an extra reference to the inode
609 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
611 struct nfs_delegation *delegation;
612 struct nfs_server *server = NFS_SERVER(inode);
613 struct nfs4_client *clp = server->nfs4_state;
614 struct nfs_inode *nfsi = NFS_I(inode);
615 struct nfs4_state_owner *sp = NULL;
616 struct nfs4_state *state = NULL;
617 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
620 /* Protect against reboot recovery - NOTE ORDER! */
621 down_read(&clp->cl_sem);
622 /* Protect against delegation recall */
623 down_read(&nfsi->rwsem);
624 delegation = NFS_I(inode)->delegation;
626 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
629 if (!(sp = nfs4_get_state_owner(server, cred))) {
630 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
633 state = nfs4_get_open_state(inode, sp);
638 if ((state->state & open_flags) == open_flags) {
639 spin_lock(&inode->i_lock);
640 if (open_flags & FMODE_READ)
642 if (open_flags & FMODE_WRITE)
644 spin_unlock(&inode->i_lock);
646 } else if (state->state != 0)
650 err = _nfs4_do_access(inode, cred, open_flags);
654 set_bit(NFS_DELEGATED_STATE, &state->flags);
655 update_open_stateid(state, &delegation->stateid, open_flags);
657 nfs4_put_state_owner(sp);
658 up_read(&nfsi->rwsem);
659 up_read(&clp->cl_sem);
666 nfs4_put_open_state(state);
667 nfs4_put_state_owner(sp);
669 up_read(&nfsi->rwsem);
670 up_read(&clp->cl_sem);
672 nfs_inode_return_delegation(inode);
676 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
678 struct nfs4_exception exception = { };
679 struct nfs4_state *res;
683 err = _nfs4_open_delegated(inode, flags, cred, &res);
686 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
688 } while (exception.retry);
693 * Returns an nfs4_state + an referenced inode
695 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
697 struct nfs4_state_owner *sp;
698 struct nfs4_state *state = NULL;
699 struct nfs_server *server = NFS_SERVER(dir);
700 struct nfs4_client *clp = server->nfs4_state;
701 struct inode *inode = NULL;
703 struct nfs_fattr f_attr, dir_attr;
704 struct nfs_openargs o_arg = {
707 .name = &dentry->d_name,
709 .bitmask = server->attr_bitmask,
710 .claim = NFS4_OPEN_CLAIM_NULL,
712 struct nfs_openres o_res = {
714 .dir_attr = &dir_attr,
718 /* Protect against reboot recovery conflicts */
719 down_read(&clp->cl_sem);
721 if (!(sp = nfs4_get_state_owner(server, cred))) {
722 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
725 if (flags & O_EXCL) {
726 u32 *p = (u32 *) o_arg.u.verifier.data;
730 o_arg.u.attrs = sattr;
731 /* Serialization for the sequence id */
733 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
734 if (o_arg.seqid == NULL)
736 nfs_fattr_init(&f_attr);
737 nfs_fattr_init(&dir_attr);
738 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
743 inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
746 state = nfs4_get_open_state(inode, sp);
749 update_open_stateid(state, &o_res.stateid, flags);
750 if (o_res.delegation_type != 0)
751 nfs_inode_set_delegation(inode, cred, &o_res);
752 nfs_free_seqid(o_arg.seqid);
753 nfs4_put_state_owner(sp);
754 up_read(&clp->cl_sem);
760 nfs4_put_open_state(state);
761 nfs_free_seqid(o_arg.seqid);
762 nfs4_put_state_owner(sp);
764 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
765 up_read(&clp->cl_sem);
773 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
775 struct nfs4_exception exception = { };
776 struct nfs4_state *res;
780 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
783 /* NOTE: BAD_SEQID means the server and client disagree about the
784 * book-keeping w.r.t. state-changing operations
785 * (OPEN/CLOSE/LOCK/LOCKU...)
786 * It is actually a sign of a bug on the client or on the server.
788 * If we receive a BAD_SEQID error in the particular case of
789 * doing an OPEN, we assume that nfs_increment_open_seqid() will
790 * have unhashed the old state_owner for us, and that we can
791 * therefore safely retry using a new one. We should still warn
794 if (status == -NFS4ERR_BAD_SEQID) {
795 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
800 * BAD_STATEID on OPEN means that the server cancelled our
801 * state before it received the OPEN_CONFIRM.
802 * Recover by retrying the request as per the discussion
803 * on Page 181 of RFC3530.
805 if (status == -NFS4ERR_BAD_STATEID) {
809 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
810 status, &exception));
811 } while (exception.retry);
815 static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
816 struct nfs_fh *fhandle, struct iattr *sattr,
817 struct nfs4_state *state)
819 struct nfs_setattrargs arg = {
823 .bitmask = server->attr_bitmask,
825 struct nfs_setattrres res = {
829 struct rpc_message msg = {
830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
836 nfs_fattr_init(fattr);
839 msg.rpc_cred = state->owner->so_cred;
840 nfs4_copy_stateid(&arg.stateid, state, current->files);
842 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
844 status = rpc_call_sync(server->client, &msg, 0);
848 static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
849 struct nfs_fh *fhandle, struct iattr *sattr,
850 struct nfs4_state *state)
852 struct nfs4_exception exception = { };
855 err = nfs4_handle_exception(server,
856 _nfs4_do_setattr(server, fattr, fhandle, sattr,
859 } while (exception.retry);
863 struct nfs4_closedata {
865 struct nfs4_state *state;
866 struct nfs_closeargs arg;
867 struct nfs_closeres res;
870 static void nfs4_free_closedata(struct nfs4_closedata *calldata)
872 struct nfs4_state *state = calldata->state;
873 struct nfs4_state_owner *sp = state->owner;
875 nfs4_put_open_state(calldata->state);
876 nfs_free_seqid(calldata->arg.seqid);
877 nfs4_put_state_owner(sp);
881 static void nfs4_close_done(struct rpc_task *task)
883 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
884 struct nfs4_state *state = calldata->state;
885 struct nfs_server *server = NFS_SERVER(calldata->inode);
887 /* hmm. we are done with the inode, and in the process of freeing
888 * the state_owner. we keep this around to process errors
890 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
891 switch (task->tk_status) {
893 memcpy(&state->stateid, &calldata->res.stateid,
894 sizeof(state->stateid));
896 case -NFS4ERR_STALE_STATEID:
897 case -NFS4ERR_EXPIRED:
898 state->state = calldata->arg.open_flags;
899 nfs4_schedule_state_recovery(server->nfs4_state);
902 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
903 rpc_restart_call(task);
907 state->state = calldata->arg.open_flags;
908 nfs4_free_closedata(calldata);
911 static void nfs4_close_begin(struct rpc_task *task)
913 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
914 struct nfs4_state *state = calldata->state;
915 struct rpc_message msg = {
916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
917 .rpc_argp = &calldata->arg,
918 .rpc_resp = &calldata->res,
919 .rpc_cred = state->owner->so_cred,
924 status = nfs_wait_on_sequence(calldata->arg.seqid, task);
927 /* Don't reorder reads */
929 /* Recalculate the new open mode in case someone reopened the file
930 * while we were waiting in line to be scheduled.
932 if (state->nreaders != 0)
934 if (state->nwriters != 0)
936 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
938 if (mode == state->state) {
939 nfs4_free_closedata(calldata);
940 task->tk_exit = NULL;
945 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
946 calldata->arg.open_flags = mode;
947 rpc_call_setup(task, &msg, 0);
951 * It is possible for data to be read/written from a mem-mapped file
952 * after the sys_close call (which hits the vfs layer as a flush).
953 * This means that we can't safely call nfsv4 close on a file until
954 * the inode is cleared. This in turn means that we are not good
955 * NFSv4 citizens - we do not indicate to the server to update the file's
956 * share state even when we are done with one of the three share
957 * stateid's in the inode.
959 * NOTE: Caller must be holding the sp->so_owner semaphore!
961 int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
963 struct nfs4_closedata *calldata;
964 int status = -ENOMEM;
966 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
967 if (calldata == NULL)
969 calldata->inode = inode;
970 calldata->state = state;
971 calldata->arg.fh = NFS_FH(inode);
972 calldata->arg.stateid = &state->stateid;
973 /* Serialization for the sequence id */
974 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
975 if (calldata->arg.seqid == NULL)
976 goto out_free_calldata;
978 status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_close_begin,
979 nfs4_close_done, calldata);
983 nfs_free_seqid(calldata->arg.seqid);
990 static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
994 filp = lookup_instantiate_filp(nd, dentry, NULL);
996 struct nfs_open_context *ctx;
997 ctx = (struct nfs_open_context *)filp->private_data;
1000 nfs4_close_state(state, nd->intent.open.flags);
1004 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1007 struct rpc_cred *cred;
1008 struct nfs4_state *state;
1011 if (nd->flags & LOOKUP_CREATE) {
1012 attr.ia_mode = nd->intent.open.create_mode;
1013 attr.ia_valid = ATTR_MODE;
1014 if (!IS_POSIXACL(dir))
1015 attr.ia_mode &= ~current->fs->umask;
1018 BUG_ON(nd->intent.open.flags & O_CREAT);
1021 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1023 return (struct dentry *)cred;
1024 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1026 if (IS_ERR(state)) {
1027 if (PTR_ERR(state) == -ENOENT)
1028 d_add(dentry, NULL);
1029 return (struct dentry *)state;
1031 res = d_add_unique(dentry, state->inode);
1034 nfs4_intent_set_file(nd, dentry, state);
1039 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1041 struct rpc_cred *cred;
1042 struct nfs4_state *state;
1043 struct inode *inode;
1045 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1047 return PTR_ERR(cred);
1048 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1050 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1052 if (IS_ERR(state)) {
1053 switch (PTR_ERR(state)) {
1059 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1062 if (dentry->d_inode == NULL)
1067 inode = state->inode;
1069 if (inode == dentry->d_inode) {
1070 nfs4_intent_set_file(nd, dentry, state);
1073 nfs4_close_state(state, openflags);
1080 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1082 struct nfs4_server_caps_res res = {};
1083 struct rpc_message msg = {
1084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1085 .rpc_argp = fhandle,
1090 status = rpc_call_sync(server->client, &msg, 0);
1092 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1093 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1094 server->caps |= NFS_CAP_ACLS;
1095 if (res.has_links != 0)
1096 server->caps |= NFS_CAP_HARDLINKS;
1097 if (res.has_symlinks != 0)
1098 server->caps |= NFS_CAP_SYMLINKS;
1099 server->acl_bitmask = res.acl_bitmask;
1104 static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1106 struct nfs4_exception exception = { };
1109 err = nfs4_handle_exception(server,
1110 _nfs4_server_capabilities(server, fhandle),
1112 } while (exception.retry);
1116 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1117 struct nfs_fsinfo *info)
1119 struct nfs4_lookup_root_arg args = {
1120 .bitmask = nfs4_fattr_bitmap,
1122 struct nfs4_lookup_res res = {
1124 .fattr = info->fattr,
1127 struct rpc_message msg = {
1128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1132 nfs_fattr_init(info->fattr);
1133 return rpc_call_sync(server->client, &msg, 0);
1136 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1137 struct nfs_fsinfo *info)
1139 struct nfs4_exception exception = { };
1142 err = nfs4_handle_exception(server,
1143 _nfs4_lookup_root(server, fhandle, info),
1145 } while (exception.retry);
1149 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1150 struct nfs_fsinfo *info)
1152 struct nfs_fattr * fattr = info->fattr;
1155 struct nfs4_lookup_arg args = {
1158 .bitmask = nfs4_fattr_bitmap,
1160 struct nfs4_lookup_res res = {
1165 struct rpc_message msg = {
1166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1173 * Now we do a separate LOOKUP for each component of the mount path.
1174 * The LOOKUPs are done separately so that we can conveniently
1175 * catch an ERR_WRONGSEC if it occurs along the way...
1177 status = nfs4_lookup_root(server, fhandle, info);
1181 p = server->mnt_path;
1183 struct nfs4_exception exception = { };
1190 while (*p && (*p != '/'))
1195 nfs_fattr_init(fattr);
1196 status = nfs4_handle_exception(server,
1197 rpc_call_sync(server->client, &msg, 0),
1199 } while (exception.retry);
1202 if (status == -ENOENT) {
1203 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1204 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1209 status = nfs4_server_capabilities(server, fhandle);
1211 status = nfs4_do_fsinfo(server, fhandle, info);
1216 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1218 struct nfs4_getattr_arg args = {
1220 .bitmask = server->attr_bitmask,
1222 struct nfs4_getattr_res res = {
1226 struct rpc_message msg = {
1227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1232 nfs_fattr_init(fattr);
1233 return rpc_call_sync(server->client, &msg, 0);
1236 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1238 struct nfs4_exception exception = { };
1241 err = nfs4_handle_exception(server,
1242 _nfs4_proc_getattr(server, fhandle, fattr),
1244 } while (exception.retry);
1249 * The file is not closed if it is opened due to the a request to change
1250 * the size of the file. The open call will not be needed once the
1251 * VFS layer lookup-intents are implemented.
1253 * Close is called when the inode is destroyed.
1254 * If we haven't opened the file for O_WRONLY, we
1255 * need to in the size_change case to obtain a stateid.
1258 * Because OPEN is always done by name in nfsv4, it is
1259 * possible that we opened a different file by the same
1260 * name. We can recognize this race condition, but we
1261 * can't do anything about it besides returning an error.
1263 * This will be fixed with VFS changes (lookup-intent).
1266 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1267 struct iattr *sattr)
1269 struct rpc_cred *cred;
1270 struct inode *inode = dentry->d_inode;
1271 struct nfs4_state *state;
1274 nfs_fattr_init(fattr);
1276 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1278 return PTR_ERR(cred);
1279 /* Search for an existing WRITE delegation first */
1280 state = nfs4_open_delegated(inode, FMODE_WRITE, cred);
1281 if (!IS_ERR(state)) {
1282 /* NB: nfs4_open_delegated() bumps the inode->i_count */
1285 /* Search for an existing open(O_WRITE) stateid */
1286 state = nfs4_find_state(inode, cred, FMODE_WRITE);
1289 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1290 NFS_FH(inode), sattr, state);
1292 nfs_setattr_update_inode(inode, sattr);
1294 nfs4_close_state(state, FMODE_WRITE);
1299 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1300 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1303 struct nfs_server *server = NFS_SERVER(dir);
1304 struct nfs4_lookup_arg args = {
1305 .bitmask = server->attr_bitmask,
1306 .dir_fh = NFS_FH(dir),
1309 struct nfs4_lookup_res res = {
1314 struct rpc_message msg = {
1315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1320 nfs_fattr_init(fattr);
1322 dprintk("NFS call lookup %s\n", name->name);
1323 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1324 dprintk("NFS reply lookup: %d\n", status);
1328 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1330 struct nfs4_exception exception = { };
1333 err = nfs4_handle_exception(NFS_SERVER(dir),
1334 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1336 } while (exception.retry);
1340 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1342 struct nfs4_accessargs args = {
1343 .fh = NFS_FH(inode),
1345 struct nfs4_accessres res = { 0 };
1346 struct rpc_message msg = {
1347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1350 .rpc_cred = entry->cred,
1352 int mode = entry->mask;
1356 * Determine which access bits we want to ask for...
1358 if (mode & MAY_READ)
1359 args.access |= NFS4_ACCESS_READ;
1360 if (S_ISDIR(inode->i_mode)) {
1361 if (mode & MAY_WRITE)
1362 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1363 if (mode & MAY_EXEC)
1364 args.access |= NFS4_ACCESS_LOOKUP;
1366 if (mode & MAY_WRITE)
1367 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1368 if (mode & MAY_EXEC)
1369 args.access |= NFS4_ACCESS_EXECUTE;
1371 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1374 if (res.access & NFS4_ACCESS_READ)
1375 entry->mask |= MAY_READ;
1376 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1377 entry->mask |= MAY_WRITE;
1378 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1379 entry->mask |= MAY_EXEC;
1384 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1386 struct nfs4_exception exception = { };
1389 err = nfs4_handle_exception(NFS_SERVER(inode),
1390 _nfs4_proc_access(inode, entry),
1392 } while (exception.retry);
1397 * TODO: For the time being, we don't try to get any attributes
1398 * along with any of the zero-copy operations READ, READDIR,
1401 * In the case of the first three, we want to put the GETATTR
1402 * after the read-type operation -- this is because it is hard
1403 * to predict the length of a GETATTR response in v4, and thus
1404 * align the READ data correctly. This means that the GETATTR
1405 * may end up partially falling into the page cache, and we should
1406 * shift it into the 'tail' of the xdr_buf before processing.
1407 * To do this efficiently, we need to know the total length
1408 * of data received, which doesn't seem to be available outside
1411 * In the case of WRITE, we also want to put the GETATTR after
1412 * the operation -- in this case because we want to make sure
1413 * we get the post-operation mtime and size. This means that
1414 * we can't use xdr_encode_pages() as written: we need a variant
1415 * of it which would leave room in the 'tail' iovec.
1417 * Both of these changes to the XDR layer would in fact be quite
1418 * minor, but I decided to leave them for a subsequent patch.
1420 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1421 unsigned int pgbase, unsigned int pglen)
1423 struct nfs4_readlink args = {
1424 .fh = NFS_FH(inode),
1429 struct rpc_message msg = {
1430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1435 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1438 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1439 unsigned int pgbase, unsigned int pglen)
1441 struct nfs4_exception exception = { };
1444 err = nfs4_handle_exception(NFS_SERVER(inode),
1445 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1447 } while (exception.retry);
1451 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1453 int flags = rdata->flags;
1454 struct inode *inode = rdata->inode;
1455 struct nfs_fattr *fattr = rdata->res.fattr;
1456 struct nfs_server *server = NFS_SERVER(inode);
1457 struct rpc_message msg = {
1458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1459 .rpc_argp = &rdata->args,
1460 .rpc_resp = &rdata->res,
1461 .rpc_cred = rdata->cred,
1463 unsigned long timestamp = jiffies;
1466 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1467 (long long) rdata->args.offset);
1469 nfs_fattr_init(fattr);
1470 status = rpc_call_sync(server->client, &msg, flags);
1472 renew_lease(server, timestamp);
1473 dprintk("NFS reply read: %d\n", status);
1477 static int nfs4_proc_read(struct nfs_read_data *rdata)
1479 struct nfs4_exception exception = { };
1482 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1483 _nfs4_proc_read(rdata),
1485 } while (exception.retry);
1489 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1491 int rpcflags = wdata->flags;
1492 struct inode *inode = wdata->inode;
1493 struct nfs_fattr *fattr = wdata->res.fattr;
1494 struct nfs_server *server = NFS_SERVER(inode);
1495 struct rpc_message msg = {
1496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1497 .rpc_argp = &wdata->args,
1498 .rpc_resp = &wdata->res,
1499 .rpc_cred = wdata->cred,
1503 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1504 (long long) wdata->args.offset);
1506 nfs_fattr_init(fattr);
1507 status = rpc_call_sync(server->client, &msg, rpcflags);
1508 dprintk("NFS reply write: %d\n", status);
1512 static int nfs4_proc_write(struct nfs_write_data *wdata)
1514 struct nfs4_exception exception = { };
1517 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1518 _nfs4_proc_write(wdata),
1520 } while (exception.retry);
1524 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1526 struct inode *inode = cdata->inode;
1527 struct nfs_fattr *fattr = cdata->res.fattr;
1528 struct nfs_server *server = NFS_SERVER(inode);
1529 struct rpc_message msg = {
1530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1531 .rpc_argp = &cdata->args,
1532 .rpc_resp = &cdata->res,
1533 .rpc_cred = cdata->cred,
1537 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1538 (long long) cdata->args.offset);
1540 nfs_fattr_init(fattr);
1541 status = rpc_call_sync(server->client, &msg, 0);
1542 dprintk("NFS reply commit: %d\n", status);
1546 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1548 struct nfs4_exception exception = { };
1551 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1552 _nfs4_proc_commit(cdata),
1554 } while (exception.retry);
1560 * We will need to arrange for the VFS layer to provide an atomic open.
1561 * Until then, this create/open method is prone to inefficiency and race
1562 * conditions due to the lookup, create, and open VFS calls from sys_open()
1563 * placed on the wire.
1565 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1566 * The file will be opened again in the subsequent VFS open call
1567 * (nfs4_proc_file_open).
1569 * The open for read will just hang around to be used by any process that
1570 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1574 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1575 int flags, struct nameidata *nd)
1577 struct nfs4_state *state;
1578 struct rpc_cred *cred;
1581 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1583 status = PTR_ERR(cred);
1586 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1588 if (IS_ERR(state)) {
1589 status = PTR_ERR(state);
1592 d_instantiate(dentry, state->inode);
1593 if (flags & O_EXCL) {
1594 struct nfs_fattr fattr;
1595 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1596 NFS_FH(state->inode), sattr, state);
1598 nfs_setattr_update_inode(state->inode, sattr);
1600 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1601 nfs4_intent_set_file(nd, dentry, state);
1603 nfs4_close_state(state, flags);
1608 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1610 struct nfs4_remove_arg args = {
1614 struct nfs4_change_info res;
1615 struct rpc_message msg = {
1616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1622 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1624 update_changeattr(dir, &res);
1628 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1630 struct nfs4_exception exception = { };
1633 err = nfs4_handle_exception(NFS_SERVER(dir),
1634 _nfs4_proc_remove(dir, name),
1636 } while (exception.retry);
1640 struct unlink_desc {
1641 struct nfs4_remove_arg args;
1642 struct nfs4_change_info res;
1645 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1648 struct unlink_desc *up;
1650 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1654 up->args.fh = NFS_FH(dir->d_inode);
1655 up->args.name = name;
1657 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1658 msg->rpc_argp = &up->args;
1659 msg->rpc_resp = &up->res;
1663 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1665 struct rpc_message *msg = &task->tk_msg;
1666 struct unlink_desc *up;
1668 if (msg->rpc_resp != NULL) {
1669 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1670 update_changeattr(dir->d_inode, &up->res);
1672 msg->rpc_resp = NULL;
1673 msg->rpc_argp = NULL;
1678 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1679 struct inode *new_dir, struct qstr *new_name)
1681 struct nfs4_rename_arg arg = {
1682 .old_dir = NFS_FH(old_dir),
1683 .new_dir = NFS_FH(new_dir),
1684 .old_name = old_name,
1685 .new_name = new_name,
1687 struct nfs4_rename_res res = { };
1688 struct rpc_message msg = {
1689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1695 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
1698 update_changeattr(old_dir, &res.old_cinfo);
1699 update_changeattr(new_dir, &res.new_cinfo);
1704 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1705 struct inode *new_dir, struct qstr *new_name)
1707 struct nfs4_exception exception = { };
1710 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1711 _nfs4_proc_rename(old_dir, old_name,
1714 } while (exception.retry);
1718 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1720 struct nfs4_link_arg arg = {
1721 .fh = NFS_FH(inode),
1722 .dir_fh = NFS_FH(dir),
1725 struct nfs4_change_info cinfo = { };
1726 struct rpc_message msg = {
1727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1733 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1735 update_changeattr(dir, &cinfo);
1740 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1742 struct nfs4_exception exception = { };
1745 err = nfs4_handle_exception(NFS_SERVER(inode),
1746 _nfs4_proc_link(inode, dir, name),
1748 } while (exception.retry);
1752 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1753 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1754 struct nfs_fattr *fattr)
1756 struct nfs_server *server = NFS_SERVER(dir);
1757 struct nfs_fattr dir_fattr;
1758 struct nfs4_create_arg arg = {
1759 .dir_fh = NFS_FH(dir),
1764 .bitmask = server->attr_bitmask,
1766 struct nfs4_create_res res = {
1770 .dir_fattr = &dir_fattr,
1772 struct rpc_message msg = {
1773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1779 if (path->len > NFS4_MAXPATHLEN)
1780 return -ENAMETOOLONG;
1781 arg.u.symlink = path;
1782 nfs_fattr_init(fattr);
1783 nfs_fattr_init(&dir_fattr);
1785 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1787 update_changeattr(dir, &res.dir_cinfo);
1788 nfs_post_op_update_inode(dir, res.dir_fattr);
1792 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1793 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1794 struct nfs_fattr *fattr)
1796 struct nfs4_exception exception = { };
1799 err = nfs4_handle_exception(NFS_SERVER(dir),
1800 _nfs4_proc_symlink(dir, name, path, sattr,
1803 } while (exception.retry);
1807 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1808 struct iattr *sattr)
1810 struct nfs_server *server = NFS_SERVER(dir);
1811 struct nfs_fh fhandle;
1812 struct nfs_fattr fattr, dir_fattr;
1813 struct nfs4_create_arg arg = {
1814 .dir_fh = NFS_FH(dir),
1816 .name = &dentry->d_name,
1819 .bitmask = server->attr_bitmask,
1821 struct nfs4_create_res res = {
1825 .dir_fattr = &dir_fattr,
1827 struct rpc_message msg = {
1828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1834 nfs_fattr_init(&fattr);
1835 nfs_fattr_init(&dir_fattr);
1837 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1839 update_changeattr(dir, &res.dir_cinfo);
1840 nfs_post_op_update_inode(dir, res.dir_fattr);
1841 status = nfs_instantiate(dentry, &fhandle, &fattr);
1846 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1847 struct iattr *sattr)
1849 struct nfs4_exception exception = { };
1852 err = nfs4_handle_exception(NFS_SERVER(dir),
1853 _nfs4_proc_mkdir(dir, dentry, sattr),
1855 } while (exception.retry);
1859 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1860 u64 cookie, struct page *page, unsigned int count, int plus)
1862 struct inode *dir = dentry->d_inode;
1863 struct nfs4_readdir_arg args = {
1868 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1870 struct nfs4_readdir_res res;
1871 struct rpc_message msg = {
1872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
1879 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
1880 dentry->d_parent->d_name.name,
1881 dentry->d_name.name,
1882 (unsigned long long)cookie);
1884 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
1885 res.pgbase = args.pgbase;
1886 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1888 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
1890 dprintk("%s: returns %d\n", __FUNCTION__, status);
1894 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1895 u64 cookie, struct page *page, unsigned int count, int plus)
1897 struct nfs4_exception exception = { };
1900 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
1901 _nfs4_proc_readdir(dentry, cred, cookie,
1904 } while (exception.retry);
1908 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1909 struct iattr *sattr, dev_t rdev)
1911 struct nfs_server *server = NFS_SERVER(dir);
1913 struct nfs_fattr fattr, dir_fattr;
1914 struct nfs4_create_arg arg = {
1915 .dir_fh = NFS_FH(dir),
1917 .name = &dentry->d_name,
1919 .bitmask = server->attr_bitmask,
1921 struct nfs4_create_res res = {
1925 .dir_fattr = &dir_fattr,
1927 struct rpc_message msg = {
1928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1933 int mode = sattr->ia_mode;
1935 nfs_fattr_init(&fattr);
1936 nfs_fattr_init(&dir_fattr);
1938 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
1939 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
1941 arg.ftype = NF4FIFO;
1942 else if (S_ISBLK(mode)) {
1944 arg.u.device.specdata1 = MAJOR(rdev);
1945 arg.u.device.specdata2 = MINOR(rdev);
1947 else if (S_ISCHR(mode)) {
1949 arg.u.device.specdata1 = MAJOR(rdev);
1950 arg.u.device.specdata2 = MINOR(rdev);
1953 arg.ftype = NF4SOCK;
1955 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1957 update_changeattr(dir, &res.dir_cinfo);
1958 nfs_post_op_update_inode(dir, res.dir_fattr);
1959 status = nfs_instantiate(dentry, &fh, &fattr);
1964 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1965 struct iattr *sattr, dev_t rdev)
1967 struct nfs4_exception exception = { };
1970 err = nfs4_handle_exception(NFS_SERVER(dir),
1971 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
1973 } while (exception.retry);
1977 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
1978 struct nfs_fsstat *fsstat)
1980 struct nfs4_statfs_arg args = {
1982 .bitmask = server->attr_bitmask,
1984 struct rpc_message msg = {
1985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
1990 nfs_fattr_init(fsstat->fattr);
1991 return rpc_call_sync(server->client, &msg, 0);
1994 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
1996 struct nfs4_exception exception = { };
1999 err = nfs4_handle_exception(server,
2000 _nfs4_proc_statfs(server, fhandle, fsstat),
2002 } while (exception.retry);
2006 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2007 struct nfs_fsinfo *fsinfo)
2009 struct nfs4_fsinfo_arg args = {
2011 .bitmask = server->attr_bitmask,
2013 struct rpc_message msg = {
2014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2019 return rpc_call_sync(server->client, &msg, 0);
2022 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2024 struct nfs4_exception exception = { };
2028 err = nfs4_handle_exception(server,
2029 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2031 } while (exception.retry);
2035 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2037 nfs_fattr_init(fsinfo->fattr);
2038 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2041 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2042 struct nfs_pathconf *pathconf)
2044 struct nfs4_pathconf_arg args = {
2046 .bitmask = server->attr_bitmask,
2048 struct rpc_message msg = {
2049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2051 .rpc_resp = pathconf,
2054 /* None of the pathconf attributes are mandatory to implement */
2055 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2056 memset(pathconf, 0, sizeof(*pathconf));
2060 nfs_fattr_init(pathconf->fattr);
2061 return rpc_call_sync(server->client, &msg, 0);
2064 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2065 struct nfs_pathconf *pathconf)
2067 struct nfs4_exception exception = { };
2071 err = nfs4_handle_exception(server,
2072 _nfs4_proc_pathconf(server, fhandle, pathconf),
2074 } while (exception.retry);
2079 nfs4_read_done(struct rpc_task *task)
2081 struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
2082 struct inode *inode = data->inode;
2084 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2085 rpc_restart_call(task);
2088 if (task->tk_status > 0)
2089 renew_lease(NFS_SERVER(inode), data->timestamp);
2090 /* Call back common NFS readpage processing */
2091 nfs_readpage_result(task);
2095 nfs4_proc_read_setup(struct nfs_read_data *data)
2097 struct rpc_task *task = &data->task;
2098 struct rpc_message msg = {
2099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2100 .rpc_argp = &data->args,
2101 .rpc_resp = &data->res,
2102 .rpc_cred = data->cred,
2104 struct inode *inode = data->inode;
2107 data->timestamp = jiffies;
2109 /* N.B. Do we need to test? Never called for swapfile inode */
2110 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
2112 /* Finalize the task. */
2113 rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
2114 rpc_call_setup(task, &msg, 0);
2118 nfs4_write_done(struct rpc_task *task)
2120 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2121 struct inode *inode = data->inode;
2123 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2124 rpc_restart_call(task);
2127 if (task->tk_status >= 0)
2128 renew_lease(NFS_SERVER(inode), data->timestamp);
2129 /* Call back common NFS writeback processing */
2130 nfs_writeback_done(task);
2134 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2136 struct rpc_task *task = &data->task;
2137 struct rpc_message msg = {
2138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2139 .rpc_argp = &data->args,
2140 .rpc_resp = &data->res,
2141 .rpc_cred = data->cred,
2143 struct inode *inode = data->inode;
2147 if (how & FLUSH_STABLE) {
2148 if (!NFS_I(inode)->ncommit)
2149 stable = NFS_FILE_SYNC;
2151 stable = NFS_DATA_SYNC;
2153 stable = NFS_UNSTABLE;
2154 data->args.stable = stable;
2156 data->timestamp = jiffies;
2158 /* Set the initial flags for the task. */
2159 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2161 /* Finalize the task. */
2162 rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
2163 rpc_call_setup(task, &msg, 0);
2167 nfs4_commit_done(struct rpc_task *task)
2169 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2170 struct inode *inode = data->inode;
2172 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2173 rpc_restart_call(task);
2176 /* Call back common NFS writeback processing */
2177 nfs_commit_done(task);
2181 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2183 struct rpc_task *task = &data->task;
2184 struct rpc_message msg = {
2185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2186 .rpc_argp = &data->args,
2187 .rpc_resp = &data->res,
2188 .rpc_cred = data->cred,
2190 struct inode *inode = data->inode;
2193 /* Set the initial flags for the task. */
2194 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2196 /* Finalize the task. */
2197 rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
2198 rpc_call_setup(task, &msg, 0);
2202 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2203 * standalone procedure for queueing an asynchronous RENEW.
2206 renew_done(struct rpc_task *task)
2208 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
2209 unsigned long timestamp = (unsigned long)task->tk_calldata;
2211 if (task->tk_status < 0) {
2212 switch (task->tk_status) {
2213 case -NFS4ERR_STALE_CLIENTID:
2214 case -NFS4ERR_EXPIRED:
2215 case -NFS4ERR_CB_PATH_DOWN:
2216 nfs4_schedule_state_recovery(clp);
2220 spin_lock(&clp->cl_lock);
2221 if (time_before(clp->cl_last_renewal,timestamp))
2222 clp->cl_last_renewal = timestamp;
2223 spin_unlock(&clp->cl_lock);
2227 nfs4_proc_async_renew(struct nfs4_client *clp)
2229 struct rpc_message msg = {
2230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2232 .rpc_cred = clp->cl_cred,
2235 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2236 renew_done, (void *)jiffies);
2240 nfs4_proc_renew(struct nfs4_client *clp)
2242 struct rpc_message msg = {
2243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2245 .rpc_cred = clp->cl_cred,
2247 unsigned long now = jiffies;
2250 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2253 spin_lock(&clp->cl_lock);
2254 if (time_before(clp->cl_last_renewal,now))
2255 clp->cl_last_renewal = now;
2256 spin_unlock(&clp->cl_lock);
2260 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2262 return (server->caps & NFS_CAP_ACLS)
2263 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2264 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2267 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2268 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2271 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2273 static void buf_to_pages(const void *buf, size_t buflen,
2274 struct page **pages, unsigned int *pgbase)
2276 const void *p = buf;
2278 *pgbase = offset_in_page(buf);
2280 while (p < buf + buflen) {
2281 *(pages++) = virt_to_page(p);
2282 p += PAGE_CACHE_SIZE;
2286 struct nfs4_cached_acl {
2292 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2294 struct nfs_inode *nfsi = NFS_I(inode);
2296 spin_lock(&inode->i_lock);
2297 kfree(nfsi->nfs4_acl);
2298 nfsi->nfs4_acl = acl;
2299 spin_unlock(&inode->i_lock);
2302 static void nfs4_zap_acl_attr(struct inode *inode)
2304 nfs4_set_cached_acl(inode, NULL);
2307 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2309 struct nfs_inode *nfsi = NFS_I(inode);
2310 struct nfs4_cached_acl *acl;
2313 spin_lock(&inode->i_lock);
2314 acl = nfsi->nfs4_acl;
2317 if (buf == NULL) /* user is just asking for length */
2319 if (acl->cached == 0)
2321 ret = -ERANGE; /* see getxattr(2) man page */
2322 if (acl->len > buflen)
2324 memcpy(buf, acl->data, acl->len);
2328 spin_unlock(&inode->i_lock);
2332 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2334 struct nfs4_cached_acl *acl;
2336 if (buf && acl_len <= PAGE_SIZE) {
2337 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2341 memcpy(acl->data, buf, acl_len);
2343 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2350 nfs4_set_cached_acl(inode, acl);
2353 static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2355 struct page *pages[NFS4ACL_MAXPAGES];
2356 struct nfs_getaclargs args = {
2357 .fh = NFS_FH(inode),
2361 size_t resp_len = buflen;
2363 struct rpc_message msg = {
2364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2366 .rpc_resp = &resp_len,
2368 struct page *localpage = NULL;
2371 if (buflen < PAGE_SIZE) {
2372 /* As long as we're doing a round trip to the server anyway,
2373 * let's be prepared for a page of acl data. */
2374 localpage = alloc_page(GFP_KERNEL);
2375 resp_buf = page_address(localpage);
2376 if (localpage == NULL)
2378 args.acl_pages[0] = localpage;
2379 args.acl_pgbase = 0;
2380 resp_len = args.acl_len = PAGE_SIZE;
2383 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2385 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2388 if (resp_len > args.acl_len)
2389 nfs4_write_cached_acl(inode, NULL, resp_len);
2391 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2394 if (resp_len > buflen)
2397 memcpy(buf, resp_buf, resp_len);
2402 __free_page(localpage);
2406 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2408 struct nfs_server *server = NFS_SERVER(inode);
2411 if (!nfs4_server_supports_acls(server))
2413 ret = nfs_revalidate_inode(server, inode);
2416 ret = nfs4_read_cached_acl(inode, buf, buflen);
2419 return nfs4_get_acl_uncached(inode, buf, buflen);
2422 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2424 struct nfs_server *server = NFS_SERVER(inode);
2425 struct page *pages[NFS4ACL_MAXPAGES];
2426 struct nfs_setaclargs arg = {
2427 .fh = NFS_FH(inode),
2431 struct rpc_message msg = {
2432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2438 if (!nfs4_server_supports_acls(server))
2440 nfs_inode_return_delegation(inode);
2441 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2442 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
2444 nfs4_write_cached_acl(inode, buf, buflen);
2449 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2451 struct nfs4_client *clp = server->nfs4_state;
2453 if (!clp || task->tk_status >= 0)
2455 switch(task->tk_status) {
2456 case -NFS4ERR_STALE_CLIENTID:
2457 case -NFS4ERR_STALE_STATEID:
2458 case -NFS4ERR_EXPIRED:
2459 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2460 nfs4_schedule_state_recovery(clp);
2461 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2462 rpc_wake_up_task(task);
2463 task->tk_status = 0;
2465 case -NFS4ERR_GRACE:
2466 case -NFS4ERR_DELAY:
2467 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2468 task->tk_status = 0;
2470 case -NFS4ERR_OLD_STATEID:
2471 task->tk_status = 0;
2474 task->tk_status = nfs4_map_errors(task->tk_status);
2478 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2482 int interruptible, res = 0;
2486 rpc_clnt_sigmask(clnt, &oldset);
2487 interruptible = TASK_UNINTERRUPTIBLE;
2489 interruptible = TASK_INTERRUPTIBLE;
2490 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2491 nfs4_schedule_state_recovery(clp);
2492 if (clnt->cl_intr && signalled())
2494 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2496 finish_wait(&clp->cl_waitq, &wait);
2497 rpc_clnt_sigunmask(clnt, &oldset);
2501 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2509 *timeout = NFS4_POLL_RETRY_MIN;
2510 if (*timeout > NFS4_POLL_RETRY_MAX)
2511 *timeout = NFS4_POLL_RETRY_MAX;
2512 rpc_clnt_sigmask(clnt, &oldset);
2513 if (clnt->cl_intr) {
2514 schedule_timeout_interruptible(*timeout);
2518 schedule_timeout_uninterruptible(*timeout);
2519 rpc_clnt_sigunmask(clnt, &oldset);
2524 /* This is the error handling routine for processes that are allowed
2527 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2529 struct nfs4_client *clp = server->nfs4_state;
2530 int ret = errorcode;
2532 exception->retry = 0;
2536 case -NFS4ERR_STALE_CLIENTID:
2537 case -NFS4ERR_STALE_STATEID:
2538 case -NFS4ERR_EXPIRED:
2539 ret = nfs4_wait_clnt_recover(server->client, clp);
2541 exception->retry = 1;
2543 case -NFS4ERR_GRACE:
2544 case -NFS4ERR_DELAY:
2545 ret = nfs4_delay(server->client, &exception->timeout);
2547 exception->retry = 1;
2549 case -NFS4ERR_OLD_STATEID:
2551 exception->retry = 1;
2553 /* We failed to handle the error */
2554 return nfs4_map_errors(ret);
2557 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2559 nfs4_verifier sc_verifier;
2560 struct nfs4_setclientid setclientid = {
2561 .sc_verifier = &sc_verifier,
2564 struct rpc_message msg = {
2565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2566 .rpc_argp = &setclientid,
2568 .rpc_cred = clp->cl_cred,
2574 p = (u32*)sc_verifier.data;
2575 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2576 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2579 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2580 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2581 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2582 clp->cl_cred->cr_ops->cr_name,
2583 clp->cl_id_uniquifier);
2584 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2585 sizeof(setclientid.sc_netid), "tcp");
2586 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2587 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2588 clp->cl_ipaddr, port >> 8, port & 255);
2590 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2591 if (status != -NFS4ERR_CLID_INUSE)
2596 ssleep(clp->cl_lease_time + 1);
2598 if (++clp->cl_id_uniquifier == 0)
2605 nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2607 struct nfs_fsinfo fsinfo;
2608 struct rpc_message msg = {
2609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2611 .rpc_resp = &fsinfo,
2612 .rpc_cred = clp->cl_cred,
2618 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2620 spin_lock(&clp->cl_lock);
2621 clp->cl_lease_time = fsinfo.lease_time * HZ;
2622 clp->cl_last_renewal = now;
2623 spin_unlock(&clp->cl_lock);
2628 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2630 struct nfs4_delegreturnargs args = {
2631 .fhandle = NFS_FH(inode),
2634 struct rpc_message msg = {
2635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2640 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2643 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2645 struct nfs_server *server = NFS_SERVER(inode);
2646 struct nfs4_exception exception = { };
2649 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2651 case -NFS4ERR_STALE_STATEID:
2652 case -NFS4ERR_EXPIRED:
2653 nfs4_schedule_state_recovery(server->nfs4_state);
2657 err = nfs4_handle_exception(server, err, &exception);
2658 } while (exception.retry);
2662 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2663 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2666 * sleep, with exponential backoff, and retry the LOCK operation.
2668 static unsigned long
2669 nfs4_set_lock_task_retry(unsigned long timeout)
2671 schedule_timeout_interruptible(timeout);
2673 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2674 return NFS4_LOCK_MAXTIMEOUT;
2679 nfs4_lck_type(int cmd, struct file_lock *request)
2682 switch (request->fl_type) {
2684 return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
2686 return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
2688 return NFS4_WRITE_LT;
2694 static inline uint64_t
2695 nfs4_lck_length(struct file_lock *request)
2697 if (request->fl_end == OFFSET_MAX)
2698 return ~(uint64_t)0;
2699 return request->fl_end - request->fl_start + 1;
2702 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2704 struct inode *inode = state->inode;
2705 struct nfs_server *server = NFS_SERVER(inode);
2706 struct nfs4_client *clp = server->nfs4_state;
2707 struct nfs_lockargs arg = {
2708 .fh = NFS_FH(inode),
2709 .type = nfs4_lck_type(cmd, request),
2710 .offset = request->fl_start,
2711 .length = nfs4_lck_length(request),
2713 struct nfs_lockres res = {
2716 struct rpc_message msg = {
2717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2720 .rpc_cred = state->owner->so_cred,
2722 struct nfs_lowner nlo;
2723 struct nfs4_lock_state *lsp;
2726 down_read(&clp->cl_sem);
2727 nlo.clientid = clp->cl_clientid;
2728 status = nfs4_set_lock_state(state, request);
2731 lsp = request->fl_u.nfs4_fl.owner;
2732 nlo.id = lsp->ls_id;
2734 status = rpc_call_sync(server->client, &msg, 0);
2736 request->fl_type = F_UNLCK;
2737 } else if (status == -NFS4ERR_DENIED) {
2738 int64_t len, start, end;
2739 start = res.u.denied.offset;
2740 len = res.u.denied.length;
2741 end = start + len - 1;
2742 if (end < 0 || len == 0)
2743 request->fl_end = OFFSET_MAX;
2745 request->fl_end = (loff_t)end;
2746 request->fl_start = (loff_t)start;
2747 request->fl_type = F_WRLCK;
2748 if (res.u.denied.type & 1)
2749 request->fl_type = F_RDLCK;
2750 request->fl_pid = 0;
2754 up_read(&clp->cl_sem);
2758 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2760 struct nfs4_exception exception = { };
2764 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2765 _nfs4_proc_getlk(state, cmd, request),
2767 } while (exception.retry);
2771 static int do_vfs_lock(struct file *file, struct file_lock *fl)
2774 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
2776 res = posix_lock_file_wait(file, fl);
2779 res = flock_lock_file_wait(file, fl);
2785 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
2790 struct nfs4_unlockdata {
2791 struct nfs_lockargs arg;
2792 struct nfs_locku_opargs luargs;
2793 struct nfs_lockres res;
2794 struct nfs4_lock_state *lsp;
2795 struct nfs_open_context *ctx;
2797 struct completion completion;
2800 static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata)
2802 if (atomic_dec_and_test(&calldata->refcount)) {
2803 nfs_free_seqid(calldata->luargs.seqid);
2804 nfs4_put_lock_state(calldata->lsp);
2805 put_nfs_open_context(calldata->ctx);
2810 static void nfs4_locku_complete(struct nfs4_unlockdata *calldata)
2812 complete(&calldata->completion);
2813 nfs4_locku_release_calldata(calldata);
2816 static void nfs4_locku_done(struct rpc_task *task)
2818 struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
2820 nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid);
2821 switch (task->tk_status) {
2823 memcpy(calldata->lsp->ls_stateid.data,
2824 calldata->res.u.stateid.data,
2825 sizeof(calldata->lsp->ls_stateid.data));
2827 case -NFS4ERR_STALE_STATEID:
2828 case -NFS4ERR_EXPIRED:
2829 nfs4_schedule_state_recovery(calldata->res.server->nfs4_state);
2832 if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) {
2833 rpc_restart_call(task);
2837 nfs4_locku_complete(calldata);
2840 static void nfs4_locku_begin(struct rpc_task *task)
2842 struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
2843 struct rpc_message msg = {
2844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
2845 .rpc_argp = &calldata->arg,
2846 .rpc_resp = &calldata->res,
2847 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
2851 status = nfs_wait_on_sequence(calldata->luargs.seqid, task);
2854 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
2855 nfs4_locku_complete(calldata);
2856 task->tk_exit = NULL;
2860 rpc_call_setup(task, &msg, 0);
2863 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2865 struct nfs4_unlockdata *calldata;
2866 struct inode *inode = state->inode;
2867 struct nfs_server *server = NFS_SERVER(inode);
2868 struct nfs4_lock_state *lsp;
2871 status = nfs4_set_lock_state(state, request);
2874 lsp = request->fl_u.nfs4_fl.owner;
2875 /* We might have lost the locks! */
2876 if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0)
2878 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
2879 if (calldata == NULL)
2881 calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid);
2882 if (calldata->luargs.seqid == NULL) {
2886 calldata->luargs.stateid = &lsp->ls_stateid;
2887 calldata->arg.fh = NFS_FH(inode);
2888 calldata->arg.type = nfs4_lck_type(cmd, request);
2889 calldata->arg.offset = request->fl_start;
2890 calldata->arg.length = nfs4_lck_length(request);
2891 calldata->arg.u.locku = &calldata->luargs;
2892 calldata->res.server = server;
2893 calldata->lsp = lsp;
2894 atomic_inc(&lsp->ls_count);
2896 /* Ensure we don't close file until we're done freeing locks! */
2897 calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data);
2899 atomic_set(&calldata->refcount, 2);
2900 init_completion(&calldata->completion);
2902 status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin,
2903 nfs4_locku_done, calldata);
2905 wait_for_completion_interruptible(&calldata->completion);
2906 do_vfs_lock(request->fl_file, request);
2907 nfs4_locku_release_calldata(calldata);
2911 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
2913 struct inode *inode = state->inode;
2914 struct nfs_server *server = NFS_SERVER(inode);
2915 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
2916 struct nfs_lock_opargs largs = {
2917 .lock_stateid = &lsp->ls_stateid,
2918 .open_stateid = &state->stateid,
2920 .clientid = server->nfs4_state->cl_clientid,
2925 struct nfs_lockargs arg = {
2926 .fh = NFS_FH(inode),
2927 .type = nfs4_lck_type(cmd, request),
2928 .offset = request->fl_start,
2929 .length = nfs4_lck_length(request),
2934 struct nfs_lockres res = {
2937 struct rpc_message msg = {
2938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
2941 .rpc_cred = state->owner->so_cred,
2943 int status = -ENOMEM;
2945 largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
2946 if (largs.lock_seqid == NULL)
2948 if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) {
2949 struct nfs4_state_owner *owner = state->owner;
2951 largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid);
2952 if (largs.open_seqid == NULL)
2954 largs.new_lock_owner = 1;
2955 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2956 /* increment open seqid on success, and seqid mutating errors */
2957 if (largs.new_lock_owner != 0) {
2958 nfs_increment_open_seqid(status, largs.open_seqid);
2960 nfs_confirm_seqid(&lsp->ls_seqid, 0);
2962 nfs_free_seqid(largs.open_seqid);
2964 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2965 /* increment lock seqid on success, and seqid mutating errors*/
2966 nfs_increment_lock_seqid(status, largs.lock_seqid);
2967 /* save the returned stateid. */
2969 memcpy(lsp->ls_stateid.data, res.u.stateid.data,
2970 sizeof(lsp->ls_stateid.data));
2971 lsp->ls_flags |= NFS_LOCK_INITIALIZED;
2972 } else if (status == -NFS4ERR_DENIED)
2975 nfs_free_seqid(largs.lock_seqid);
2979 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
2981 struct nfs_server *server = NFS_SERVER(state->inode);
2982 struct nfs4_exception exception = { };
2986 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
2987 if (err != -NFS4ERR_DELAY)
2989 nfs4_handle_exception(server, err, &exception);
2990 } while (exception.retry);
2994 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
2996 struct nfs_server *server = NFS_SERVER(state->inode);
2997 struct nfs4_exception exception = { };
3001 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3002 if (err != -NFS4ERR_DELAY)
3004 nfs4_handle_exception(server, err, &exception);
3005 } while (exception.retry);
3009 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3011 struct nfs4_client *clp = state->owner->so_client;
3014 down_read(&clp->cl_sem);
3015 status = nfs4_set_lock_state(state, request);
3017 status = _nfs4_do_setlk(state, cmd, request, 0);
3019 /* Note: we always want to sleep here! */
3020 request->fl_flags |= FL_SLEEP;
3021 if (do_vfs_lock(request->fl_file, request) < 0)
3022 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3024 up_read(&clp->cl_sem);
3028 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3030 struct nfs4_exception exception = { };
3034 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3035 _nfs4_proc_setlk(state, cmd, request),
3037 } while (exception.retry);
3042 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3044 struct nfs_open_context *ctx;
3045 struct nfs4_state *state;
3046 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3049 /* verify open state */
3050 ctx = (struct nfs_open_context *)filp->private_data;
3053 if (request->fl_start < 0 || request->fl_end < 0)
3057 return nfs4_proc_getlk(state, F_GETLK, request);
3059 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3062 if (request->fl_type == F_UNLCK)
3063 return nfs4_proc_unlck(state, cmd, request);
3066 status = nfs4_proc_setlk(state, cmd, request);
3067 if ((status != -EAGAIN) || IS_SETLK(cmd))
3069 timeout = nfs4_set_lock_task_retry(timeout);
3070 status = -ERESTARTSYS;
3073 } while(status < 0);
3078 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3080 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3081 size_t buflen, int flags)
3083 struct inode *inode = dentry->d_inode;
3085 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3088 if (!S_ISREG(inode->i_mode) &&
3089 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3092 return nfs4_proc_set_acl(inode, buf, buflen);
3095 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3096 * and that's what we'll do for e.g. user attributes that haven't been set.
3097 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3098 * attributes in kernel-managed attribute namespaces. */
3099 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3102 struct inode *inode = dentry->d_inode;
3104 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3107 return nfs4_proc_get_acl(inode, buf, buflen);
3110 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3112 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3114 if (buf && buflen < len)
3117 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3121 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3122 .recover_open = nfs4_open_reclaim,
3123 .recover_lock = nfs4_lock_reclaim,
3126 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3127 .recover_open = nfs4_open_expired,
3128 .recover_lock = nfs4_lock_expired,
3131 static struct inode_operations nfs4_file_inode_operations = {
3132 .permission = nfs_permission,
3133 .getattr = nfs_getattr,
3134 .setattr = nfs_setattr,
3135 .getxattr = nfs4_getxattr,
3136 .setxattr = nfs4_setxattr,
3137 .listxattr = nfs4_listxattr,
3140 struct nfs_rpc_ops nfs_v4_clientops = {
3141 .version = 4, /* protocol version */
3142 .dentry_ops = &nfs4_dentry_operations,
3143 .dir_inode_ops = &nfs4_dir_inode_operations,
3144 .file_inode_ops = &nfs4_file_inode_operations,
3145 .getroot = nfs4_proc_get_root,
3146 .getattr = nfs4_proc_getattr,
3147 .setattr = nfs4_proc_setattr,
3148 .lookup = nfs4_proc_lookup,
3149 .access = nfs4_proc_access,
3150 .readlink = nfs4_proc_readlink,
3151 .read = nfs4_proc_read,
3152 .write = nfs4_proc_write,
3153 .commit = nfs4_proc_commit,
3154 .create = nfs4_proc_create,
3155 .remove = nfs4_proc_remove,
3156 .unlink_setup = nfs4_proc_unlink_setup,
3157 .unlink_done = nfs4_proc_unlink_done,
3158 .rename = nfs4_proc_rename,
3159 .link = nfs4_proc_link,
3160 .symlink = nfs4_proc_symlink,
3161 .mkdir = nfs4_proc_mkdir,
3162 .rmdir = nfs4_proc_remove,
3163 .readdir = nfs4_proc_readdir,
3164 .mknod = nfs4_proc_mknod,
3165 .statfs = nfs4_proc_statfs,
3166 .fsinfo = nfs4_proc_fsinfo,
3167 .pathconf = nfs4_proc_pathconf,
3168 .decode_dirent = nfs4_decode_dirent,
3169 .read_setup = nfs4_proc_read_setup,
3170 .write_setup = nfs4_proc_write_setup,
3171 .commit_setup = nfs4_proc_commit_setup,
3172 .file_open = nfs_open,
3173 .file_release = nfs_release,
3174 .lock = nfs4_proc_lock,
3175 .clear_acl_cache = nfs4_zap_acl_attr,