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"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (HZ/10)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata *data);
63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
65 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
66 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
67 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
69 /* Prevent leaks of NFSv4 errors into userland */
70 int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
198 struct nfs_client *clp = server->nfs_client;
199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
205 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
207 struct nfs_inode *nfsi = NFS_I(dir);
209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
213 spin_unlock(&dir->i_lock);
216 struct nfs4_opendata {
218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
226 struct nfs4_state_owner *owner;
228 unsigned long timestamp;
233 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
237 struct dentry *parent = dget_parent(path->dentry);
238 struct inode *dir = parent->d_inode;
239 struct nfs_server *server = NFS_SERVER(dir);
240 struct nfs4_opendata *p;
242 p = kzalloc(sizeof(*p), GFP_KERNEL);
245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
246 if (p->o_arg.seqid == NULL)
248 p->path.mnt = mntget(path->mnt);
249 p->path.dentry = dget(path->dentry);
252 atomic_inc(&sp->so_count);
253 p->o_arg.fh = NFS_FH(dir);
254 p->o_arg.open_flags = flags,
255 p->o_arg.clientid = server->nfs_client->cl_clientid;
256 p->o_arg.id = sp->so_id;
257 p->o_arg.name = &p->path.dentry->d_name;
258 p->o_arg.server = server;
259 p->o_arg.bitmask = server->attr_bitmask;
260 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
261 p->o_res.f_attr = &p->f_attr;
262 p->o_res.dir_attr = &p->dir_attr;
263 p->o_res.server = server;
264 nfs_fattr_init(&p->f_attr);
265 nfs_fattr_init(&p->dir_attr);
266 if (flags & O_EXCL) {
267 u32 *s = (u32 *) p->o_arg.u.verifier.data;
270 } else if (flags & O_CREAT) {
271 p->o_arg.u.attrs = &p->attrs;
272 memcpy(&p->attrs, attrs, sizeof(p->attrs));
274 p->c_arg.fh = &p->o_res.fh;
275 p->c_arg.stateid = &p->o_res.stateid;
276 p->c_arg.seqid = p->o_arg.seqid;
286 static void nfs4_opendata_free(struct kref *kref)
288 struct nfs4_opendata *p = container_of(kref,
289 struct nfs4_opendata, kref);
291 nfs_free_seqid(p->o_arg.seqid);
292 nfs4_put_state_owner(p->owner);
294 dput(p->path.dentry);
299 static void nfs4_opendata_put(struct nfs4_opendata *p)
302 kref_put(&p->kref, nfs4_opendata_free);
305 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
310 rpc_clnt_sigmask(task->tk_client, &oldset);
311 ret = rpc_wait_for_completion_task(task);
312 rpc_clnt_sigunmask(task->tk_client, &oldset);
316 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
318 switch (open_flags) {
325 case FMODE_READ|FMODE_WRITE:
330 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
332 struct inode *inode = state->inode;
334 open_flags &= (FMODE_READ|FMODE_WRITE);
335 /* Protect against nfs4_find_state_byowner() */
336 spin_lock(&state->owner->so_lock);
337 spin_lock(&inode->i_lock);
338 memcpy(&state->stateid, stateid, sizeof(state->stateid));
339 update_open_stateflags(state, open_flags);
340 nfs4_state_set_mode_locked(state, state->state | open_flags);
341 spin_unlock(&inode->i_lock);
342 spin_unlock(&state->owner->so_lock);
345 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
348 struct nfs4_state *state = NULL;
350 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
352 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
355 state = nfs4_get_open_state(inode, data->owner);
358 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
365 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
367 struct nfs_inode *nfsi = NFS_I(state->inode);
368 struct nfs_open_context *ctx;
370 spin_lock(&state->inode->i_lock);
371 list_for_each_entry(ctx, &nfsi->open_files, list) {
372 if (ctx->state != state)
374 get_nfs_open_context(ctx);
375 spin_unlock(&state->inode->i_lock);
378 spin_unlock(&state->inode->i_lock);
379 return ERR_PTR(-ENOENT);
382 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
386 opendata->o_arg.open_flags = openflags;
387 ret = _nfs4_proc_open(opendata);
390 memcpy(stateid->data, opendata->o_res.stateid.data,
391 sizeof(stateid->data));
395 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
397 nfs4_stateid stateid;
398 struct nfs4_state *newstate;
403 /* memory barrier prior to reading state->n_* */
405 if (state->n_rdwr != 0) {
406 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
409 mode |= FMODE_READ|FMODE_WRITE;
410 if (opendata->o_res.delegation_type != 0)
411 delegation = opendata->o_res.delegation_type;
414 if (state->n_wronly != 0) {
415 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
419 if (opendata->o_res.delegation_type != 0)
420 delegation = opendata->o_res.delegation_type;
423 if (state->n_rdonly != 0) {
424 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
429 clear_bit(NFS_DELEGATED_STATE, &state->flags);
432 if (opendata->o_res.delegation_type == 0)
433 opendata->o_res.delegation_type = delegation;
434 opendata->o_arg.open_flags |= mode;
435 newstate = nfs4_opendata_to_nfs4_state(opendata);
436 if (newstate != NULL) {
437 if (opendata->o_res.delegation_type != 0) {
438 struct nfs_inode *nfsi = NFS_I(newstate->inode);
439 int delegation_flags = 0;
440 if (nfsi->delegation)
441 delegation_flags = nfsi->delegation->flags;
442 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
443 nfs_inode_set_delegation(newstate->inode,
444 opendata->owner->so_cred,
447 nfs_inode_reclaim_delegation(newstate->inode,
448 opendata->owner->so_cred,
451 nfs4_close_state(&opendata->path, newstate, opendata->o_arg.open_flags);
453 if (newstate != state)
460 * reclaim state on the server after a reboot.
462 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
464 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
465 struct nfs4_opendata *opendata;
466 int delegation_type = 0;
469 if (delegation != NULL) {
470 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
471 memcpy(&state->stateid, &delegation->stateid,
472 sizeof(state->stateid));
473 set_bit(NFS_DELEGATED_STATE, &state->flags);
476 delegation_type = delegation->type;
478 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
479 if (opendata == NULL)
481 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
482 opendata->o_arg.fh = NFS_FH(state->inode);
483 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
484 opendata->o_arg.u.delegation_type = delegation_type;
485 status = nfs4_open_recover(opendata, state);
486 nfs4_opendata_put(opendata);
490 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
492 struct nfs_server *server = NFS_SERVER(state->inode);
493 struct nfs4_exception exception = { };
496 err = _nfs4_do_open_reclaim(ctx, state);
497 if (err != -NFS4ERR_DELAY)
499 nfs4_handle_exception(server, err, &exception);
500 } while (exception.retry);
504 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
506 struct nfs_open_context *ctx;
509 ctx = nfs4_state_find_open_context(state);
512 ret = nfs4_do_open_reclaim(ctx, state);
513 put_nfs_open_context(ctx);
517 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
519 struct nfs4_state_owner *sp = state->owner;
520 struct nfs4_opendata *opendata;
523 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
525 opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
526 if (opendata == NULL)
528 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
529 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
530 sizeof(opendata->o_arg.u.delegation.data));
531 ret = nfs4_open_recover(opendata, state);
532 nfs4_opendata_put(opendata);
536 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
538 struct nfs4_exception exception = { };
539 struct nfs_server *server = NFS_SERVER(state->inode);
542 err = _nfs4_open_delegation_recall(ctx, state);
546 case -NFS4ERR_STALE_CLIENTID:
547 case -NFS4ERR_STALE_STATEID:
548 case -NFS4ERR_EXPIRED:
549 /* Don't recall a delegation if it was lost */
550 nfs4_schedule_state_recovery(server->nfs_client);
553 err = nfs4_handle_exception(server, err, &exception);
554 } while (exception.retry);
558 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
560 struct nfs4_opendata *data = calldata;
561 struct rpc_message msg = {
562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
563 .rpc_argp = &data->c_arg,
564 .rpc_resp = &data->c_res,
565 .rpc_cred = data->owner->so_cred,
567 data->timestamp = jiffies;
568 rpc_call_setup(task, &msg, 0);
571 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
573 struct nfs4_opendata *data = calldata;
575 data->rpc_status = task->tk_status;
576 if (RPC_ASSASSINATED(task))
578 if (data->rpc_status == 0) {
579 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
580 sizeof(data->o_res.stateid.data));
581 renew_lease(data->o_res.server, data->timestamp);
583 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
584 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
587 static void nfs4_open_confirm_release(void *calldata)
589 struct nfs4_opendata *data = calldata;
590 struct nfs4_state *state = NULL;
592 /* If this request hasn't been cancelled, do nothing */
593 if (data->cancelled == 0)
595 /* In case of error, no cleanup! */
596 if (data->rpc_status != 0)
598 nfs_confirm_seqid(&data->owner->so_seqid, 0);
599 state = nfs4_opendata_to_nfs4_state(data);
601 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
603 nfs4_opendata_put(data);
606 static const struct rpc_call_ops nfs4_open_confirm_ops = {
607 .rpc_call_prepare = nfs4_open_confirm_prepare,
608 .rpc_call_done = nfs4_open_confirm_done,
609 .rpc_release = nfs4_open_confirm_release,
613 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
615 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
617 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
618 struct rpc_task *task;
621 kref_get(&data->kref);
623 * If rpc_run_task() ends up calling ->rpc_release(), we
624 * want to ensure that it takes the 'error' code path.
626 data->rpc_status = -ENOMEM;
627 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
629 return PTR_ERR(task);
630 status = nfs4_wait_for_completion_rpc_task(task);
635 status = data->rpc_status;
640 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
642 struct nfs4_opendata *data = calldata;
643 struct nfs4_state_owner *sp = data->owner;
644 struct rpc_message msg = {
645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
646 .rpc_argp = &data->o_arg,
647 .rpc_resp = &data->o_res,
648 .rpc_cred = sp->so_cred,
651 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
653 /* Update sequence id. */
654 data->o_arg.id = sp->so_id;
655 data->o_arg.clientid = sp->so_client->cl_clientid;
656 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
657 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
658 data->timestamp = jiffies;
659 rpc_call_setup(task, &msg, 0);
662 static void nfs4_open_done(struct rpc_task *task, void *calldata)
664 struct nfs4_opendata *data = calldata;
666 data->rpc_status = task->tk_status;
667 if (RPC_ASSASSINATED(task))
669 if (task->tk_status == 0) {
670 switch (data->o_res.f_attr->mode & S_IFMT) {
674 data->rpc_status = -ELOOP;
677 data->rpc_status = -EISDIR;
680 data->rpc_status = -ENOTDIR;
682 renew_lease(data->o_res.server, data->timestamp);
684 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
687 static void nfs4_open_release(void *calldata)
689 struct nfs4_opendata *data = calldata;
690 struct nfs4_state *state = NULL;
692 /* If this request hasn't been cancelled, do nothing */
693 if (data->cancelled == 0)
695 /* In case of error, no cleanup! */
696 if (data->rpc_status != 0)
698 /* In case we need an open_confirm, no cleanup! */
699 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
701 nfs_confirm_seqid(&data->owner->so_seqid, 0);
702 state = nfs4_opendata_to_nfs4_state(data);
704 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
706 nfs4_opendata_put(data);
709 static const struct rpc_call_ops nfs4_open_ops = {
710 .rpc_call_prepare = nfs4_open_prepare,
711 .rpc_call_done = nfs4_open_done,
712 .rpc_release = nfs4_open_release,
716 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
718 static int _nfs4_proc_open(struct nfs4_opendata *data)
720 struct inode *dir = data->dir->d_inode;
721 struct nfs_server *server = NFS_SERVER(dir);
722 struct nfs_openargs *o_arg = &data->o_arg;
723 struct nfs_openres *o_res = &data->o_res;
724 struct rpc_task *task;
727 kref_get(&data->kref);
729 * If rpc_run_task() ends up calling ->rpc_release(), we
730 * want to ensure that it takes the 'error' code path.
732 data->rpc_status = -ENOMEM;
733 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
735 return PTR_ERR(task);
736 status = nfs4_wait_for_completion_rpc_task(task);
741 status = data->rpc_status;
746 if (o_arg->open_flags & O_CREAT) {
747 update_changeattr(dir, &o_res->cinfo);
748 nfs_post_op_update_inode(dir, o_res->dir_attr);
750 nfs_refresh_inode(dir, o_res->dir_attr);
751 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
752 status = _nfs4_proc_open_confirm(data);
756 nfs_confirm_seqid(&data->owner->so_seqid, 0);
757 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
758 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
762 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
764 struct nfs_access_entry cache;
768 if (openflags & FMODE_READ)
770 if (openflags & FMODE_WRITE)
772 status = nfs_access_get_cached(inode, cred, &cache);
776 /* Be clever: ask server to check for all possible rights */
777 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
779 cache.jiffies = jiffies;
780 status = _nfs4_proc_access(inode, &cache);
783 nfs_access_add_cache(inode, &cache);
785 if ((cache.mask & mask) == mask)
790 static int nfs4_recover_expired_lease(struct nfs_server *server)
792 struct nfs_client *clp = server->nfs_client;
796 ret = nfs4_wait_clnt_recover(server->client, clp);
799 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
801 nfs4_schedule_state_recovery(clp);
808 * reclaim state on the server after a network partition.
809 * Assumes caller holds the appropriate lock
811 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
813 struct inode *inode = state->inode;
814 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
815 struct nfs4_opendata *opendata;
816 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
819 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
820 ret = _nfs4_do_access(inode, ctx->cred, openflags);
823 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
824 set_bit(NFS_DELEGATED_STATE, &state->flags);
827 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL);
828 if (opendata == NULL)
830 ret = nfs4_open_recover(opendata, state);
831 if (ret == -ESTALE) {
832 /* Invalidate the state owner so we don't ever use it again */
833 nfs4_drop_state_owner(state->owner);
834 d_drop(ctx->path.dentry);
836 nfs4_opendata_put(opendata);
840 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
842 struct nfs_server *server = NFS_SERVER(state->inode);
843 struct nfs4_exception exception = { };
847 err = _nfs4_open_expired(ctx, state);
848 if (err == -NFS4ERR_DELAY)
849 nfs4_handle_exception(server, err, &exception);
850 } while (exception.retry);
854 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
856 struct nfs_open_context *ctx;
859 ctx = nfs4_state_find_open_context(state);
862 ret = nfs4_do_open_expired(ctx, state);
863 put_nfs_open_context(ctx);
868 * Returns a referenced nfs4_state if there is an open delegation on the file
870 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
872 struct nfs_delegation *delegation;
873 struct nfs_server *server = NFS_SERVER(inode);
874 struct nfs_client *clp = server->nfs_client;
875 struct nfs_inode *nfsi = NFS_I(inode);
876 struct nfs4_state_owner *sp = NULL;
877 struct nfs4_state *state = NULL;
878 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
882 if (!(sp = nfs4_get_state_owner(server, cred))) {
883 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
886 err = nfs4_recover_expired_lease(server);
888 goto out_put_state_owner;
889 /* Protect against reboot recovery - NOTE ORDER! */
890 down_read(&clp->cl_sem);
891 /* Protect against delegation recall */
892 down_read(&nfsi->rwsem);
893 delegation = NFS_I(inode)->delegation;
895 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
898 state = nfs4_get_open_state(inode, sp);
903 if ((state->state & open_flags) == open_flags) {
904 spin_lock(&inode->i_lock);
905 update_open_stateflags(state, open_flags);
906 spin_unlock(&inode->i_lock);
908 } else if (state->state != 0)
909 goto out_put_open_state;
912 err = _nfs4_do_access(inode, cred, open_flags);
915 goto out_put_open_state;
916 set_bit(NFS_DELEGATED_STATE, &state->flags);
917 update_open_stateid(state, &delegation->stateid, open_flags);
919 nfs4_put_state_owner(sp);
920 up_read(&nfsi->rwsem);
921 up_read(&clp->cl_sem);
925 nfs4_put_open_state(state);
927 up_read(&nfsi->rwsem);
928 up_read(&clp->cl_sem);
930 nfs_inode_return_delegation(inode);
932 nfs4_put_state_owner(sp);
936 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
938 struct nfs4_exception exception = { };
939 struct nfs4_state *res = ERR_PTR(-EIO);
943 err = _nfs4_open_delegated(inode, flags, cred, &res);
946 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
948 } while (exception.retry);
953 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
954 * fields corresponding to attributes that were used to store the verifier.
955 * Make sure we clobber those fields in the later setattr call
957 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
959 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
960 !(sattr->ia_valid & ATTR_ATIME_SET))
961 sattr->ia_valid |= ATTR_ATIME;
963 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
964 !(sattr->ia_valid & ATTR_MTIME_SET))
965 sattr->ia_valid |= ATTR_MTIME;
969 * Returns a referenced nfs4_state
971 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
973 struct nfs4_state_owner *sp;
974 struct nfs4_state *state = NULL;
975 struct nfs_server *server = NFS_SERVER(dir);
976 struct nfs_client *clp = server->nfs_client;
977 struct nfs4_opendata *opendata;
980 /* Protect against reboot recovery conflicts */
982 if (!(sp = nfs4_get_state_owner(server, cred))) {
983 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
986 status = nfs4_recover_expired_lease(server);
988 goto err_put_state_owner;
989 down_read(&clp->cl_sem);
991 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
992 if (opendata == NULL)
993 goto err_release_rwsem;
995 status = _nfs4_proc_open(opendata);
997 goto err_opendata_put;
999 if (opendata->o_arg.open_flags & O_EXCL)
1000 nfs4_exclusive_attrset(opendata, sattr);
1003 state = nfs4_opendata_to_nfs4_state(opendata);
1005 goto err_opendata_put;
1006 if (opendata->o_res.delegation_type != 0)
1007 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
1008 nfs4_opendata_put(opendata);
1009 nfs4_put_state_owner(sp);
1010 up_read(&clp->cl_sem);
1014 nfs4_opendata_put(opendata);
1016 up_read(&clp->cl_sem);
1017 err_put_state_owner:
1018 nfs4_put_state_owner(sp);
1025 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1027 struct nfs4_exception exception = { };
1028 struct nfs4_state *res;
1032 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1035 /* NOTE: BAD_SEQID means the server and client disagree about the
1036 * book-keeping w.r.t. state-changing operations
1037 * (OPEN/CLOSE/LOCK/LOCKU...)
1038 * It is actually a sign of a bug on the client or on the server.
1040 * If we receive a BAD_SEQID error in the particular case of
1041 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1042 * have unhashed the old state_owner for us, and that we can
1043 * therefore safely retry using a new one. We should still warn
1044 * the user though...
1046 if (status == -NFS4ERR_BAD_SEQID) {
1047 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1048 exception.retry = 1;
1052 * BAD_STATEID on OPEN means that the server cancelled our
1053 * state before it received the OPEN_CONFIRM.
1054 * Recover by retrying the request as per the discussion
1055 * on Page 181 of RFC3530.
1057 if (status == -NFS4ERR_BAD_STATEID) {
1058 exception.retry = 1;
1061 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1062 status, &exception));
1063 } while (exception.retry);
1067 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1068 struct iattr *sattr, struct nfs4_state *state)
1070 struct nfs_server *server = NFS_SERVER(inode);
1071 struct nfs_setattrargs arg = {
1072 .fh = NFS_FH(inode),
1075 .bitmask = server->attr_bitmask,
1077 struct nfs_setattrres res = {
1081 struct rpc_message msg = {
1082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1086 unsigned long timestamp = jiffies;
1089 nfs_fattr_init(fattr);
1091 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1092 /* Use that stateid */
1093 } else if (state != NULL) {
1094 msg.rpc_cred = state->owner->so_cred;
1095 nfs4_copy_stateid(&arg.stateid, state, current->files);
1097 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1099 status = rpc_call_sync(server->client, &msg, 0);
1100 if (status == 0 && state != NULL)
1101 renew_lease(server, timestamp);
1105 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1106 struct iattr *sattr, struct nfs4_state *state)
1108 struct nfs_server *server = NFS_SERVER(inode);
1109 struct nfs4_exception exception = { };
1112 err = nfs4_handle_exception(server,
1113 _nfs4_do_setattr(inode, fattr, sattr, state),
1115 } while (exception.retry);
1119 struct nfs4_closedata {
1121 struct inode *inode;
1122 struct nfs4_state *state;
1123 struct nfs_closeargs arg;
1124 struct nfs_closeres res;
1125 struct nfs_fattr fattr;
1126 unsigned long timestamp;
1129 static void nfs4_free_closedata(void *data)
1131 struct nfs4_closedata *calldata = data;
1132 struct nfs4_state_owner *sp = calldata->state->owner;
1134 nfs4_put_open_state(calldata->state);
1135 nfs_free_seqid(calldata->arg.seqid);
1136 nfs4_put_state_owner(sp);
1137 dput(calldata->path.dentry);
1138 mntput(calldata->path.mnt);
1142 static void nfs4_close_done(struct rpc_task *task, void *data)
1144 struct nfs4_closedata *calldata = data;
1145 struct nfs4_state *state = calldata->state;
1146 struct nfs_server *server = NFS_SERVER(calldata->inode);
1148 if (RPC_ASSASSINATED(task))
1150 /* hmm. we are done with the inode, and in the process of freeing
1151 * the state_owner. we keep this around to process errors
1153 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1154 switch (task->tk_status) {
1156 memcpy(&state->stateid, &calldata->res.stateid,
1157 sizeof(state->stateid));
1158 renew_lease(server, calldata->timestamp);
1160 case -NFS4ERR_STALE_STATEID:
1161 case -NFS4ERR_EXPIRED:
1164 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1165 rpc_restart_call(task);
1169 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1172 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1174 struct nfs4_closedata *calldata = data;
1175 struct nfs4_state *state = calldata->state;
1176 struct rpc_message msg = {
1177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1178 .rpc_argp = &calldata->arg,
1179 .rpc_resp = &calldata->res,
1180 .rpc_cred = state->owner->so_cred,
1182 int mode = 0, old_mode;
1184 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1186 /* Recalculate the new open mode in case someone reopened the file
1187 * while we were waiting in line to be scheduled.
1189 spin_lock(&state->owner->so_lock);
1190 spin_lock(&calldata->inode->i_lock);
1191 mode = old_mode = state->state;
1192 if (state->n_rdwr == 0) {
1193 if (state->n_rdonly == 0)
1194 mode &= ~FMODE_READ;
1195 if (state->n_wronly == 0)
1196 mode &= ~FMODE_WRITE;
1198 nfs4_state_set_mode_locked(state, mode);
1199 spin_unlock(&calldata->inode->i_lock);
1200 spin_unlock(&state->owner->so_lock);
1201 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1202 /* Note: exit _without_ calling nfs4_close_done */
1203 task->tk_action = NULL;
1206 nfs_fattr_init(calldata->res.fattr);
1208 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1209 calldata->arg.open_flags = mode;
1210 calldata->timestamp = jiffies;
1211 rpc_call_setup(task, &msg, 0);
1214 static const struct rpc_call_ops nfs4_close_ops = {
1215 .rpc_call_prepare = nfs4_close_prepare,
1216 .rpc_call_done = nfs4_close_done,
1217 .rpc_release = nfs4_free_closedata,
1221 * It is possible for data to be read/written from a mem-mapped file
1222 * after the sys_close call (which hits the vfs layer as a flush).
1223 * This means that we can't safely call nfsv4 close on a file until
1224 * the inode is cleared. This in turn means that we are not good
1225 * NFSv4 citizens - we do not indicate to the server to update the file's
1226 * share state even when we are done with one of the three share
1227 * stateid's in the inode.
1229 * NOTE: Caller must be holding the sp->so_owner semaphore!
1231 int nfs4_do_close(struct path *path, struct nfs4_state *state)
1233 struct nfs_server *server = NFS_SERVER(state->inode);
1234 struct nfs4_closedata *calldata;
1235 struct nfs4_state_owner *sp = state->owner;
1236 struct rpc_task *task;
1237 int status = -ENOMEM;
1239 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1240 if (calldata == NULL)
1242 calldata->inode = state->inode;
1243 calldata->state = state;
1244 calldata->arg.fh = NFS_FH(state->inode);
1245 calldata->arg.stateid = &state->stateid;
1246 /* Serialization for the sequence id */
1247 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1248 if (calldata->arg.seqid == NULL)
1249 goto out_free_calldata;
1250 calldata->arg.bitmask = server->attr_bitmask;
1251 calldata->res.fattr = &calldata->fattr;
1252 calldata->res.server = server;
1253 calldata->path.mnt = mntget(path->mnt);
1254 calldata->path.dentry = dget(path->dentry);
1256 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1258 return PTR_ERR(task);
1264 nfs4_put_open_state(state);
1265 nfs4_put_state_owner(sp);
1269 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1273 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1274 if (!IS_ERR(filp)) {
1275 struct nfs_open_context *ctx;
1276 ctx = (struct nfs_open_context *)filp->private_data;
1280 nfs4_close_state(path, state, nd->intent.open.flags);
1281 return PTR_ERR(filp);
1285 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1287 struct path path = {
1292 struct rpc_cred *cred;
1293 struct nfs4_state *state;
1296 if (nd->flags & LOOKUP_CREATE) {
1297 attr.ia_mode = nd->intent.open.create_mode;
1298 attr.ia_valid = ATTR_MODE;
1299 if (!IS_POSIXACL(dir))
1300 attr.ia_mode &= ~current->fs->umask;
1303 BUG_ON(nd->intent.open.flags & O_CREAT);
1306 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1308 return (struct dentry *)cred;
1309 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1311 if (IS_ERR(state)) {
1312 if (PTR_ERR(state) == -ENOENT)
1313 d_add(dentry, NULL);
1314 return (struct dentry *)state;
1316 res = d_add_unique(dentry, igrab(state->inode));
1319 nfs4_intent_set_file(nd, &path, state);
1324 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1326 struct path path = {
1330 struct rpc_cred *cred;
1331 struct nfs4_state *state;
1333 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1335 return PTR_ERR(cred);
1336 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1338 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1340 if (IS_ERR(state)) {
1341 switch (PTR_ERR(state)) {
1347 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1353 if (state->inode == dentry->d_inode) {
1354 nfs4_intent_set_file(nd, &path, state);
1357 nfs4_close_state(&path, state, openflags);
1364 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1366 struct nfs4_server_caps_res res = {};
1367 struct rpc_message msg = {
1368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1369 .rpc_argp = fhandle,
1374 status = rpc_call_sync(server->client, &msg, 0);
1376 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1377 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1378 server->caps |= NFS_CAP_ACLS;
1379 if (res.has_links != 0)
1380 server->caps |= NFS_CAP_HARDLINKS;
1381 if (res.has_symlinks != 0)
1382 server->caps |= NFS_CAP_SYMLINKS;
1383 server->acl_bitmask = res.acl_bitmask;
1388 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1390 struct nfs4_exception exception = { };
1393 err = nfs4_handle_exception(server,
1394 _nfs4_server_capabilities(server, fhandle),
1396 } while (exception.retry);
1400 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1401 struct nfs_fsinfo *info)
1403 struct nfs4_lookup_root_arg args = {
1404 .bitmask = nfs4_fattr_bitmap,
1406 struct nfs4_lookup_res res = {
1408 .fattr = info->fattr,
1411 struct rpc_message msg = {
1412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1416 nfs_fattr_init(info->fattr);
1417 return rpc_call_sync(server->client, &msg, 0);
1420 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1421 struct nfs_fsinfo *info)
1423 struct nfs4_exception exception = { };
1426 err = nfs4_handle_exception(server,
1427 _nfs4_lookup_root(server, fhandle, info),
1429 } while (exception.retry);
1434 * get the file handle for the "/" directory on the server
1436 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1437 struct nfs_fsinfo *info)
1441 status = nfs4_lookup_root(server, fhandle, info);
1443 status = nfs4_server_capabilities(server, fhandle);
1445 status = nfs4_do_fsinfo(server, fhandle, info);
1446 return nfs4_map_errors(status);
1450 * Get locations and (maybe) other attributes of a referral.
1451 * Note that we'll actually follow the referral later when
1452 * we detect fsid mismatch in inode revalidation
1454 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1456 int status = -ENOMEM;
1457 struct page *page = NULL;
1458 struct nfs4_fs_locations *locations = NULL;
1460 page = alloc_page(GFP_KERNEL);
1463 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1464 if (locations == NULL)
1467 status = nfs4_proc_fs_locations(dir, name, locations, page);
1470 /* Make sure server returned a different fsid for the referral */
1471 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1472 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1477 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1478 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1480 fattr->mode = S_IFDIR;
1481 memset(fhandle, 0, sizeof(struct nfs_fh));
1490 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1492 struct nfs4_getattr_arg args = {
1494 .bitmask = server->attr_bitmask,
1496 struct nfs4_getattr_res res = {
1500 struct rpc_message msg = {
1501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1506 nfs_fattr_init(fattr);
1507 return rpc_call_sync(server->client, &msg, 0);
1510 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1512 struct nfs4_exception exception = { };
1515 err = nfs4_handle_exception(server,
1516 _nfs4_proc_getattr(server, fhandle, fattr),
1518 } while (exception.retry);
1523 * The file is not closed if it is opened due to the a request to change
1524 * the size of the file. The open call will not be needed once the
1525 * VFS layer lookup-intents are implemented.
1527 * Close is called when the inode is destroyed.
1528 * If we haven't opened the file for O_WRONLY, we
1529 * need to in the size_change case to obtain a stateid.
1532 * Because OPEN is always done by name in nfsv4, it is
1533 * possible that we opened a different file by the same
1534 * name. We can recognize this race condition, but we
1535 * can't do anything about it besides returning an error.
1537 * This will be fixed with VFS changes (lookup-intent).
1540 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1541 struct iattr *sattr)
1543 struct rpc_cred *cred;
1544 struct inode *inode = dentry->d_inode;
1545 struct nfs_open_context *ctx;
1546 struct nfs4_state *state = NULL;
1549 nfs_fattr_init(fattr);
1551 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1553 return PTR_ERR(cred);
1555 /* Search for an existing open(O_WRITE) file */
1556 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1560 status = nfs4_do_setattr(inode, fattr, sattr, state);
1562 nfs_setattr_update_inode(inode, sattr);
1564 put_nfs_open_context(ctx);
1569 static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1570 struct qstr *name, struct nfs_fh *fhandle,
1571 struct nfs_fattr *fattr)
1574 struct nfs4_lookup_arg args = {
1575 .bitmask = server->attr_bitmask,
1579 struct nfs4_lookup_res res = {
1584 struct rpc_message msg = {
1585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1590 nfs_fattr_init(fattr);
1592 dprintk("NFS call lookupfh %s\n", name->name);
1593 status = rpc_call_sync(server->client, &msg, 0);
1594 dprintk("NFS reply lookupfh: %d\n", status);
1598 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1599 struct qstr *name, struct nfs_fh *fhandle,
1600 struct nfs_fattr *fattr)
1602 struct nfs4_exception exception = { };
1605 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1607 if (err == -NFS4ERR_MOVED) {
1611 err = nfs4_handle_exception(server, err, &exception);
1612 } while (exception.retry);
1616 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1617 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1621 dprintk("NFS call lookup %s\n", name->name);
1622 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1623 if (status == -NFS4ERR_MOVED)
1624 status = nfs4_get_referral(dir, name, fattr, fhandle);
1625 dprintk("NFS reply lookup: %d\n", status);
1629 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1631 struct nfs4_exception exception = { };
1634 err = nfs4_handle_exception(NFS_SERVER(dir),
1635 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1637 } while (exception.retry);
1641 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1643 struct nfs4_accessargs args = {
1644 .fh = NFS_FH(inode),
1646 struct nfs4_accessres res = { 0 };
1647 struct rpc_message msg = {
1648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1651 .rpc_cred = entry->cred,
1653 int mode = entry->mask;
1657 * Determine which access bits we want to ask for...
1659 if (mode & MAY_READ)
1660 args.access |= NFS4_ACCESS_READ;
1661 if (S_ISDIR(inode->i_mode)) {
1662 if (mode & MAY_WRITE)
1663 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1664 if (mode & MAY_EXEC)
1665 args.access |= NFS4_ACCESS_LOOKUP;
1667 if (mode & MAY_WRITE)
1668 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1669 if (mode & MAY_EXEC)
1670 args.access |= NFS4_ACCESS_EXECUTE;
1672 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1675 if (res.access & NFS4_ACCESS_READ)
1676 entry->mask |= MAY_READ;
1677 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1678 entry->mask |= MAY_WRITE;
1679 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1680 entry->mask |= MAY_EXEC;
1685 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1687 struct nfs4_exception exception = { };
1690 err = nfs4_handle_exception(NFS_SERVER(inode),
1691 _nfs4_proc_access(inode, entry),
1693 } while (exception.retry);
1698 * TODO: For the time being, we don't try to get any attributes
1699 * along with any of the zero-copy operations READ, READDIR,
1702 * In the case of the first three, we want to put the GETATTR
1703 * after the read-type operation -- this is because it is hard
1704 * to predict the length of a GETATTR response in v4, and thus
1705 * align the READ data correctly. This means that the GETATTR
1706 * may end up partially falling into the page cache, and we should
1707 * shift it into the 'tail' of the xdr_buf before processing.
1708 * To do this efficiently, we need to know the total length
1709 * of data received, which doesn't seem to be available outside
1712 * In the case of WRITE, we also want to put the GETATTR after
1713 * the operation -- in this case because we want to make sure
1714 * we get the post-operation mtime and size. This means that
1715 * we can't use xdr_encode_pages() as written: we need a variant
1716 * of it which would leave room in the 'tail' iovec.
1718 * Both of these changes to the XDR layer would in fact be quite
1719 * minor, but I decided to leave them for a subsequent patch.
1721 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1722 unsigned int pgbase, unsigned int pglen)
1724 struct nfs4_readlink args = {
1725 .fh = NFS_FH(inode),
1730 struct rpc_message msg = {
1731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1736 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1739 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1740 unsigned int pgbase, unsigned int pglen)
1742 struct nfs4_exception exception = { };
1745 err = nfs4_handle_exception(NFS_SERVER(inode),
1746 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1748 } while (exception.retry);
1754 * We will need to arrange for the VFS layer to provide an atomic open.
1755 * Until then, this create/open method is prone to inefficiency and race
1756 * conditions due to the lookup, create, and open VFS calls from sys_open()
1757 * placed on the wire.
1759 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1760 * The file will be opened again in the subsequent VFS open call
1761 * (nfs4_proc_file_open).
1763 * The open for read will just hang around to be used by any process that
1764 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1768 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1769 int flags, struct nameidata *nd)
1771 struct path path = {
1775 struct nfs4_state *state;
1776 struct rpc_cred *cred;
1779 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1781 status = PTR_ERR(cred);
1784 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1786 if (IS_ERR(state)) {
1787 status = PTR_ERR(state);
1790 d_instantiate(dentry, igrab(state->inode));
1791 if (flags & O_EXCL) {
1792 struct nfs_fattr fattr;
1793 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1795 nfs_setattr_update_inode(state->inode, sattr);
1796 nfs_post_op_update_inode(state->inode, &fattr);
1798 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1799 status = nfs4_intent_set_file(nd, &path, state);
1801 nfs4_close_state(&path, state, flags);
1806 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1808 struct nfs_server *server = NFS_SERVER(dir);
1809 struct nfs4_remove_arg args = {
1812 .bitmask = server->attr_bitmask,
1814 struct nfs_fattr dir_attr;
1815 struct nfs4_remove_res res = {
1817 .dir_attr = &dir_attr,
1819 struct rpc_message msg = {
1820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1826 nfs_fattr_init(res.dir_attr);
1827 status = rpc_call_sync(server->client, &msg, 0);
1829 update_changeattr(dir, &res.cinfo);
1830 nfs_post_op_update_inode(dir, res.dir_attr);
1835 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1837 struct nfs4_exception exception = { };
1840 err = nfs4_handle_exception(NFS_SERVER(dir),
1841 _nfs4_proc_remove(dir, name),
1843 } while (exception.retry);
1847 struct unlink_desc {
1848 struct nfs4_remove_arg args;
1849 struct nfs4_remove_res res;
1850 struct nfs_fattr dir_attr;
1853 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1856 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1857 struct unlink_desc *up;
1859 up = kmalloc(sizeof(*up), GFP_KERNEL);
1863 up->args.fh = NFS_FH(dir->d_inode);
1864 up->args.name = name;
1865 up->args.bitmask = server->attr_bitmask;
1866 up->res.server = server;
1867 up->res.dir_attr = &up->dir_attr;
1869 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1870 msg->rpc_argp = &up->args;
1871 msg->rpc_resp = &up->res;
1875 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1877 struct rpc_message *msg = &task->tk_msg;
1878 struct unlink_desc *up;
1880 if (msg->rpc_resp != NULL) {
1881 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1882 update_changeattr(dir->d_inode, &up->res.cinfo);
1883 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1885 msg->rpc_resp = NULL;
1886 msg->rpc_argp = NULL;
1891 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1892 struct inode *new_dir, struct qstr *new_name)
1894 struct nfs_server *server = NFS_SERVER(old_dir);
1895 struct nfs4_rename_arg arg = {
1896 .old_dir = NFS_FH(old_dir),
1897 .new_dir = NFS_FH(new_dir),
1898 .old_name = old_name,
1899 .new_name = new_name,
1900 .bitmask = server->attr_bitmask,
1902 struct nfs_fattr old_fattr, new_fattr;
1903 struct nfs4_rename_res res = {
1905 .old_fattr = &old_fattr,
1906 .new_fattr = &new_fattr,
1908 struct rpc_message msg = {
1909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1915 nfs_fattr_init(res.old_fattr);
1916 nfs_fattr_init(res.new_fattr);
1917 status = rpc_call_sync(server->client, &msg, 0);
1920 update_changeattr(old_dir, &res.old_cinfo);
1921 nfs_post_op_update_inode(old_dir, res.old_fattr);
1922 update_changeattr(new_dir, &res.new_cinfo);
1923 nfs_post_op_update_inode(new_dir, res.new_fattr);
1928 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1929 struct inode *new_dir, struct qstr *new_name)
1931 struct nfs4_exception exception = { };
1934 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1935 _nfs4_proc_rename(old_dir, old_name,
1938 } while (exception.retry);
1942 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1944 struct nfs_server *server = NFS_SERVER(inode);
1945 struct nfs4_link_arg arg = {
1946 .fh = NFS_FH(inode),
1947 .dir_fh = NFS_FH(dir),
1949 .bitmask = server->attr_bitmask,
1951 struct nfs_fattr fattr, dir_attr;
1952 struct nfs4_link_res res = {
1955 .dir_attr = &dir_attr,
1957 struct rpc_message msg = {
1958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1964 nfs_fattr_init(res.fattr);
1965 nfs_fattr_init(res.dir_attr);
1966 status = rpc_call_sync(server->client, &msg, 0);
1968 update_changeattr(dir, &res.cinfo);
1969 nfs_post_op_update_inode(dir, res.dir_attr);
1970 nfs_post_op_update_inode(inode, res.fattr);
1976 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1978 struct nfs4_exception exception = { };
1981 err = nfs4_handle_exception(NFS_SERVER(inode),
1982 _nfs4_proc_link(inode, dir, name),
1984 } while (exception.retry);
1988 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1989 struct page *page, unsigned int len, struct iattr *sattr)
1991 struct nfs_server *server = NFS_SERVER(dir);
1992 struct nfs_fh fhandle;
1993 struct nfs_fattr fattr, dir_fattr;
1994 struct nfs4_create_arg arg = {
1995 .dir_fh = NFS_FH(dir),
1997 .name = &dentry->d_name,
2000 .bitmask = server->attr_bitmask,
2002 struct nfs4_create_res res = {
2006 .dir_fattr = &dir_fattr,
2008 struct rpc_message msg = {
2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2015 if (len > NFS4_MAXPATHLEN)
2016 return -ENAMETOOLONG;
2018 arg.u.symlink.pages = &page;
2019 arg.u.symlink.len = len;
2020 nfs_fattr_init(&fattr);
2021 nfs_fattr_init(&dir_fattr);
2023 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2025 update_changeattr(dir, &res.dir_cinfo);
2026 nfs_post_op_update_inode(dir, res.dir_fattr);
2027 status = nfs_instantiate(dentry, &fhandle, &fattr);
2032 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2033 struct page *page, unsigned int len, struct iattr *sattr)
2035 struct nfs4_exception exception = { };
2038 err = nfs4_handle_exception(NFS_SERVER(dir),
2039 _nfs4_proc_symlink(dir, dentry, page,
2042 } while (exception.retry);
2046 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2047 struct iattr *sattr)
2049 struct nfs_server *server = NFS_SERVER(dir);
2050 struct nfs_fh fhandle;
2051 struct nfs_fattr fattr, dir_fattr;
2052 struct nfs4_create_arg arg = {
2053 .dir_fh = NFS_FH(dir),
2055 .name = &dentry->d_name,
2058 .bitmask = server->attr_bitmask,
2060 struct nfs4_create_res res = {
2064 .dir_fattr = &dir_fattr,
2066 struct rpc_message msg = {
2067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2073 nfs_fattr_init(&fattr);
2074 nfs_fattr_init(&dir_fattr);
2076 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2078 update_changeattr(dir, &res.dir_cinfo);
2079 nfs_post_op_update_inode(dir, res.dir_fattr);
2080 status = nfs_instantiate(dentry, &fhandle, &fattr);
2085 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2086 struct iattr *sattr)
2088 struct nfs4_exception exception = { };
2091 err = nfs4_handle_exception(NFS_SERVER(dir),
2092 _nfs4_proc_mkdir(dir, dentry, sattr),
2094 } while (exception.retry);
2098 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2099 u64 cookie, struct page *page, unsigned int count, int plus)
2101 struct inode *dir = dentry->d_inode;
2102 struct nfs4_readdir_arg args = {
2107 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2109 struct nfs4_readdir_res res;
2110 struct rpc_message msg = {
2111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2118 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2119 dentry->d_parent->d_name.name,
2120 dentry->d_name.name,
2121 (unsigned long long)cookie);
2122 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2123 res.pgbase = args.pgbase;
2124 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2126 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2127 dprintk("%s: returns %d\n", __FUNCTION__, status);
2131 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2132 u64 cookie, struct page *page, unsigned int count, int plus)
2134 struct nfs4_exception exception = { };
2137 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2138 _nfs4_proc_readdir(dentry, cred, cookie,
2141 } while (exception.retry);
2145 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2146 struct iattr *sattr, dev_t rdev)
2148 struct nfs_server *server = NFS_SERVER(dir);
2150 struct nfs_fattr fattr, dir_fattr;
2151 struct nfs4_create_arg arg = {
2152 .dir_fh = NFS_FH(dir),
2154 .name = &dentry->d_name,
2156 .bitmask = server->attr_bitmask,
2158 struct nfs4_create_res res = {
2162 .dir_fattr = &dir_fattr,
2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2170 int mode = sattr->ia_mode;
2172 nfs_fattr_init(&fattr);
2173 nfs_fattr_init(&dir_fattr);
2175 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2176 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2178 arg.ftype = NF4FIFO;
2179 else if (S_ISBLK(mode)) {
2181 arg.u.device.specdata1 = MAJOR(rdev);
2182 arg.u.device.specdata2 = MINOR(rdev);
2184 else if (S_ISCHR(mode)) {
2186 arg.u.device.specdata1 = MAJOR(rdev);
2187 arg.u.device.specdata2 = MINOR(rdev);
2190 arg.ftype = NF4SOCK;
2192 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2194 update_changeattr(dir, &res.dir_cinfo);
2195 nfs_post_op_update_inode(dir, res.dir_fattr);
2196 status = nfs_instantiate(dentry, &fh, &fattr);
2201 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2202 struct iattr *sattr, dev_t rdev)
2204 struct nfs4_exception exception = { };
2207 err = nfs4_handle_exception(NFS_SERVER(dir),
2208 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2210 } while (exception.retry);
2214 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2215 struct nfs_fsstat *fsstat)
2217 struct nfs4_statfs_arg args = {
2219 .bitmask = server->attr_bitmask,
2221 struct rpc_message msg = {
2222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2227 nfs_fattr_init(fsstat->fattr);
2228 return rpc_call_sync(server->client, &msg, 0);
2231 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2233 struct nfs4_exception exception = { };
2236 err = nfs4_handle_exception(server,
2237 _nfs4_proc_statfs(server, fhandle, fsstat),
2239 } while (exception.retry);
2243 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2244 struct nfs_fsinfo *fsinfo)
2246 struct nfs4_fsinfo_arg args = {
2248 .bitmask = server->attr_bitmask,
2250 struct rpc_message msg = {
2251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2256 return rpc_call_sync(server->client, &msg, 0);
2259 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2261 struct nfs4_exception exception = { };
2265 err = nfs4_handle_exception(server,
2266 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2268 } while (exception.retry);
2272 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2274 nfs_fattr_init(fsinfo->fattr);
2275 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2278 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2279 struct nfs_pathconf *pathconf)
2281 struct nfs4_pathconf_arg args = {
2283 .bitmask = server->attr_bitmask,
2285 struct rpc_message msg = {
2286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2288 .rpc_resp = pathconf,
2291 /* None of the pathconf attributes are mandatory to implement */
2292 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2293 memset(pathconf, 0, sizeof(*pathconf));
2297 nfs_fattr_init(pathconf->fattr);
2298 return rpc_call_sync(server->client, &msg, 0);
2301 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2302 struct nfs_pathconf *pathconf)
2304 struct nfs4_exception exception = { };
2308 err = nfs4_handle_exception(server,
2309 _nfs4_proc_pathconf(server, fhandle, pathconf),
2311 } while (exception.retry);
2315 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2317 struct nfs_server *server = NFS_SERVER(data->inode);
2319 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2320 rpc_restart_call(task);
2323 if (task->tk_status > 0)
2324 renew_lease(server, data->timestamp);
2328 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2330 struct rpc_message msg = {
2331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2332 .rpc_argp = &data->args,
2333 .rpc_resp = &data->res,
2334 .rpc_cred = data->cred,
2337 data->timestamp = jiffies;
2339 rpc_call_setup(&data->task, &msg, 0);
2342 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2344 struct inode *inode = data->inode;
2346 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2347 rpc_restart_call(task);
2350 if (task->tk_status >= 0) {
2351 renew_lease(NFS_SERVER(inode), data->timestamp);
2352 nfs_post_op_update_inode(inode, data->res.fattr);
2357 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2359 struct rpc_message msg = {
2360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2361 .rpc_argp = &data->args,
2362 .rpc_resp = &data->res,
2363 .rpc_cred = data->cred,
2365 struct inode *inode = data->inode;
2366 struct nfs_server *server = NFS_SERVER(inode);
2369 if (how & FLUSH_STABLE) {
2370 if (!NFS_I(inode)->ncommit)
2371 stable = NFS_FILE_SYNC;
2373 stable = NFS_DATA_SYNC;
2375 stable = NFS_UNSTABLE;
2376 data->args.stable = stable;
2377 data->args.bitmask = server->attr_bitmask;
2378 data->res.server = server;
2380 data->timestamp = jiffies;
2382 /* Finalize the task. */
2383 rpc_call_setup(&data->task, &msg, 0);
2386 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2388 struct inode *inode = data->inode;
2390 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2391 rpc_restart_call(task);
2394 if (task->tk_status >= 0)
2395 nfs_post_op_update_inode(inode, data->res.fattr);
2399 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2401 struct rpc_message msg = {
2402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2403 .rpc_argp = &data->args,
2404 .rpc_resp = &data->res,
2405 .rpc_cred = data->cred,
2407 struct nfs_server *server = NFS_SERVER(data->inode);
2409 data->args.bitmask = server->attr_bitmask;
2410 data->res.server = server;
2412 rpc_call_setup(&data->task, &msg, 0);
2416 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2417 * standalone procedure for queueing an asynchronous RENEW.
2419 static void nfs4_renew_done(struct rpc_task *task, void *data)
2421 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2422 unsigned long timestamp = (unsigned long)data;
2424 if (task->tk_status < 0) {
2425 switch (task->tk_status) {
2426 case -NFS4ERR_STALE_CLIENTID:
2427 case -NFS4ERR_EXPIRED:
2428 case -NFS4ERR_CB_PATH_DOWN:
2429 nfs4_schedule_state_recovery(clp);
2433 spin_lock(&clp->cl_lock);
2434 if (time_before(clp->cl_last_renewal,timestamp))
2435 clp->cl_last_renewal = timestamp;
2436 spin_unlock(&clp->cl_lock);
2439 static const struct rpc_call_ops nfs4_renew_ops = {
2440 .rpc_call_done = nfs4_renew_done,
2443 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2445 struct rpc_message msg = {
2446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2451 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2452 &nfs4_renew_ops, (void *)jiffies);
2455 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2457 struct rpc_message msg = {
2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2462 unsigned long now = jiffies;
2465 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2468 spin_lock(&clp->cl_lock);
2469 if (time_before(clp->cl_last_renewal,now))
2470 clp->cl_last_renewal = now;
2471 spin_unlock(&clp->cl_lock);
2475 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2477 return (server->caps & NFS_CAP_ACLS)
2478 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2479 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2482 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2483 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2486 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2488 static void buf_to_pages(const void *buf, size_t buflen,
2489 struct page **pages, unsigned int *pgbase)
2491 const void *p = buf;
2493 *pgbase = offset_in_page(buf);
2495 while (p < buf + buflen) {
2496 *(pages++) = virt_to_page(p);
2497 p += PAGE_CACHE_SIZE;
2501 struct nfs4_cached_acl {
2507 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2509 struct nfs_inode *nfsi = NFS_I(inode);
2511 spin_lock(&inode->i_lock);
2512 kfree(nfsi->nfs4_acl);
2513 nfsi->nfs4_acl = acl;
2514 spin_unlock(&inode->i_lock);
2517 static void nfs4_zap_acl_attr(struct inode *inode)
2519 nfs4_set_cached_acl(inode, NULL);
2522 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2524 struct nfs_inode *nfsi = NFS_I(inode);
2525 struct nfs4_cached_acl *acl;
2528 spin_lock(&inode->i_lock);
2529 acl = nfsi->nfs4_acl;
2532 if (buf == NULL) /* user is just asking for length */
2534 if (acl->cached == 0)
2536 ret = -ERANGE; /* see getxattr(2) man page */
2537 if (acl->len > buflen)
2539 memcpy(buf, acl->data, acl->len);
2543 spin_unlock(&inode->i_lock);
2547 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2549 struct nfs4_cached_acl *acl;
2551 if (buf && acl_len <= PAGE_SIZE) {
2552 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2556 memcpy(acl->data, buf, acl_len);
2558 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2565 nfs4_set_cached_acl(inode, acl);
2568 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2570 struct page *pages[NFS4ACL_MAXPAGES];
2571 struct nfs_getaclargs args = {
2572 .fh = NFS_FH(inode),
2576 size_t resp_len = buflen;
2578 struct rpc_message msg = {
2579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2581 .rpc_resp = &resp_len,
2583 struct page *localpage = NULL;
2586 if (buflen < PAGE_SIZE) {
2587 /* As long as we're doing a round trip to the server anyway,
2588 * let's be prepared for a page of acl data. */
2589 localpage = alloc_page(GFP_KERNEL);
2590 resp_buf = page_address(localpage);
2591 if (localpage == NULL)
2593 args.acl_pages[0] = localpage;
2594 args.acl_pgbase = 0;
2595 resp_len = args.acl_len = PAGE_SIZE;
2598 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2600 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2603 if (resp_len > args.acl_len)
2604 nfs4_write_cached_acl(inode, NULL, resp_len);
2606 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2609 if (resp_len > buflen)
2612 memcpy(buf, resp_buf, resp_len);
2617 __free_page(localpage);
2621 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2623 struct nfs4_exception exception = { };
2626 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2629 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2630 } while (exception.retry);
2634 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2636 struct nfs_server *server = NFS_SERVER(inode);
2639 if (!nfs4_server_supports_acls(server))
2641 ret = nfs_revalidate_inode(server, inode);
2644 ret = nfs4_read_cached_acl(inode, buf, buflen);
2647 return nfs4_get_acl_uncached(inode, buf, buflen);
2650 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2652 struct nfs_server *server = NFS_SERVER(inode);
2653 struct page *pages[NFS4ACL_MAXPAGES];
2654 struct nfs_setaclargs arg = {
2655 .fh = NFS_FH(inode),
2659 struct rpc_message msg = {
2660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2666 if (!nfs4_server_supports_acls(server))
2668 nfs_inode_return_delegation(inode);
2669 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2670 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2671 nfs_zap_caches(inode);
2675 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2677 struct nfs4_exception exception = { };
2680 err = nfs4_handle_exception(NFS_SERVER(inode),
2681 __nfs4_proc_set_acl(inode, buf, buflen),
2683 } while (exception.retry);
2688 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2690 struct nfs_client *clp = server->nfs_client;
2692 if (!clp || task->tk_status >= 0)
2694 switch(task->tk_status) {
2695 case -NFS4ERR_STALE_CLIENTID:
2696 case -NFS4ERR_STALE_STATEID:
2697 case -NFS4ERR_EXPIRED:
2698 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2699 nfs4_schedule_state_recovery(clp);
2700 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2701 rpc_wake_up_task(task);
2702 task->tk_status = 0;
2704 case -NFS4ERR_DELAY:
2705 nfs_inc_server_stats((struct nfs_server *) server,
2707 case -NFS4ERR_GRACE:
2708 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2709 task->tk_status = 0;
2711 case -NFS4ERR_OLD_STATEID:
2712 task->tk_status = 0;
2715 task->tk_status = nfs4_map_errors(task->tk_status);
2719 static int nfs4_wait_bit_interruptible(void *word)
2721 if (signal_pending(current))
2722 return -ERESTARTSYS;
2727 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2734 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2736 rpc_clnt_sigmask(clnt, &oldset);
2737 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2738 nfs4_wait_bit_interruptible,
2739 TASK_INTERRUPTIBLE);
2740 rpc_clnt_sigunmask(clnt, &oldset);
2742 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2746 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2754 *timeout = NFS4_POLL_RETRY_MIN;
2755 if (*timeout > NFS4_POLL_RETRY_MAX)
2756 *timeout = NFS4_POLL_RETRY_MAX;
2757 rpc_clnt_sigmask(clnt, &oldset);
2758 if (clnt->cl_intr) {
2759 schedule_timeout_interruptible(*timeout);
2763 schedule_timeout_uninterruptible(*timeout);
2764 rpc_clnt_sigunmask(clnt, &oldset);
2769 /* This is the error handling routine for processes that are allowed
2772 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2774 struct nfs_client *clp = server->nfs_client;
2775 int ret = errorcode;
2777 exception->retry = 0;
2781 case -NFS4ERR_STALE_CLIENTID:
2782 case -NFS4ERR_STALE_STATEID:
2783 case -NFS4ERR_EXPIRED:
2784 nfs4_schedule_state_recovery(clp);
2785 ret = nfs4_wait_clnt_recover(server->client, clp);
2787 exception->retry = 1;
2789 case -NFS4ERR_FILE_OPEN:
2790 case -NFS4ERR_GRACE:
2791 case -NFS4ERR_DELAY:
2792 ret = nfs4_delay(server->client, &exception->timeout);
2795 case -NFS4ERR_OLD_STATEID:
2796 exception->retry = 1;
2798 /* We failed to handle the error */
2799 return nfs4_map_errors(ret);
2802 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2804 nfs4_verifier sc_verifier;
2805 struct nfs4_setclientid setclientid = {
2806 .sc_verifier = &sc_verifier,
2809 struct rpc_message msg = {
2810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2811 .rpc_argp = &setclientid,
2819 p = (__be32*)sc_verifier.data;
2820 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2821 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2824 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2825 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2826 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2827 cred->cr_ops->cr_name,
2828 clp->cl_id_uniquifier);
2829 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2830 sizeof(setclientid.sc_netid), "tcp");
2831 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2832 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2833 clp->cl_ipaddr, port >> 8, port & 255);
2835 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2836 if (status != -NFS4ERR_CLID_INUSE)
2841 ssleep(clp->cl_lease_time + 1);
2843 if (++clp->cl_id_uniquifier == 0)
2849 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2851 struct nfs_fsinfo fsinfo;
2852 struct rpc_message msg = {
2853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2855 .rpc_resp = &fsinfo,
2862 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2864 spin_lock(&clp->cl_lock);
2865 clp->cl_lease_time = fsinfo.lease_time * HZ;
2866 clp->cl_last_renewal = now;
2867 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2868 spin_unlock(&clp->cl_lock);
2873 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2878 err = _nfs4_proc_setclientid_confirm(clp, cred);
2882 case -NFS4ERR_RESOURCE:
2883 /* The IBM lawyers misread another document! */
2884 case -NFS4ERR_DELAY:
2885 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2891 struct nfs4_delegreturndata {
2892 struct nfs4_delegreturnargs args;
2893 struct nfs4_delegreturnres res;
2895 nfs4_stateid stateid;
2896 struct rpc_cred *cred;
2897 unsigned long timestamp;
2898 struct nfs_fattr fattr;
2902 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2904 struct nfs4_delegreturndata *data = calldata;
2905 struct rpc_message msg = {
2906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2907 .rpc_argp = &data->args,
2908 .rpc_resp = &data->res,
2909 .rpc_cred = data->cred,
2911 nfs_fattr_init(data->res.fattr);
2912 rpc_call_setup(task, &msg, 0);
2915 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2917 struct nfs4_delegreturndata *data = calldata;
2918 data->rpc_status = task->tk_status;
2919 if (data->rpc_status == 0)
2920 renew_lease(data->res.server, data->timestamp);
2923 static void nfs4_delegreturn_release(void *calldata)
2925 struct nfs4_delegreturndata *data = calldata;
2927 put_rpccred(data->cred);
2931 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2932 .rpc_call_prepare = nfs4_delegreturn_prepare,
2933 .rpc_call_done = nfs4_delegreturn_done,
2934 .rpc_release = nfs4_delegreturn_release,
2937 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2939 struct nfs4_delegreturndata *data;
2940 struct nfs_server *server = NFS_SERVER(inode);
2941 struct rpc_task *task;
2944 data = kmalloc(sizeof(*data), GFP_KERNEL);
2947 data->args.fhandle = &data->fh;
2948 data->args.stateid = &data->stateid;
2949 data->args.bitmask = server->attr_bitmask;
2950 nfs_copy_fh(&data->fh, NFS_FH(inode));
2951 memcpy(&data->stateid, stateid, sizeof(data->stateid));
2952 data->res.fattr = &data->fattr;
2953 data->res.server = server;
2954 data->cred = get_rpccred(cred);
2955 data->timestamp = jiffies;
2956 data->rpc_status = 0;
2958 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2960 return PTR_ERR(task);
2961 status = nfs4_wait_for_completion_rpc_task(task);
2963 status = data->rpc_status;
2965 nfs_post_op_update_inode(inode, &data->fattr);
2971 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2973 struct nfs_server *server = NFS_SERVER(inode);
2974 struct nfs4_exception exception = { };
2977 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2979 case -NFS4ERR_STALE_STATEID:
2980 case -NFS4ERR_EXPIRED:
2984 err = nfs4_handle_exception(server, err, &exception);
2985 } while (exception.retry);
2989 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2990 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2993 * sleep, with exponential backoff, and retry the LOCK operation.
2995 static unsigned long
2996 nfs4_set_lock_task_retry(unsigned long timeout)
2998 schedule_timeout_interruptible(timeout);
3000 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3001 return NFS4_LOCK_MAXTIMEOUT;
3005 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3007 struct inode *inode = state->inode;
3008 struct nfs_server *server = NFS_SERVER(inode);
3009 struct nfs_client *clp = server->nfs_client;
3010 struct nfs_lockt_args arg = {
3011 .fh = NFS_FH(inode),
3014 struct nfs_lockt_res res = {
3017 struct rpc_message msg = {
3018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3021 .rpc_cred = state->owner->so_cred,
3023 struct nfs4_lock_state *lsp;
3026 down_read(&clp->cl_sem);
3027 arg.lock_owner.clientid = clp->cl_clientid;
3028 status = nfs4_set_lock_state(state, request);
3031 lsp = request->fl_u.nfs4_fl.owner;
3032 arg.lock_owner.id = lsp->ls_id;
3033 status = rpc_call_sync(server->client, &msg, 0);
3036 request->fl_type = F_UNLCK;
3038 case -NFS4ERR_DENIED:
3041 request->fl_ops->fl_release_private(request);
3043 up_read(&clp->cl_sem);
3047 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3049 struct nfs4_exception exception = { };
3053 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3054 _nfs4_proc_getlk(state, cmd, request),
3056 } while (exception.retry);
3060 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3063 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3065 res = posix_lock_file_wait(file, fl);
3068 res = flock_lock_file_wait(file, fl);
3076 struct nfs4_unlockdata {
3077 struct nfs_locku_args arg;
3078 struct nfs_locku_res res;
3079 struct nfs4_lock_state *lsp;
3080 struct nfs_open_context *ctx;
3081 struct file_lock fl;
3082 const struct nfs_server *server;
3083 unsigned long timestamp;
3086 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3087 struct nfs_open_context *ctx,
3088 struct nfs4_lock_state *lsp,
3089 struct nfs_seqid *seqid)
3091 struct nfs4_unlockdata *p;
3092 struct inode *inode = lsp->ls_state->inode;
3094 p = kmalloc(sizeof(*p), GFP_KERNEL);
3097 p->arg.fh = NFS_FH(inode);
3099 p->arg.seqid = seqid;
3100 p->arg.stateid = &lsp->ls_stateid;
3102 atomic_inc(&lsp->ls_count);
3103 /* Ensure we don't close file until we're done freeing locks! */
3104 p->ctx = get_nfs_open_context(ctx);
3105 memcpy(&p->fl, fl, sizeof(p->fl));
3106 p->server = NFS_SERVER(inode);
3110 static void nfs4_locku_release_calldata(void *data)
3112 struct nfs4_unlockdata *calldata = data;
3113 nfs_free_seqid(calldata->arg.seqid);
3114 nfs4_put_lock_state(calldata->lsp);
3115 put_nfs_open_context(calldata->ctx);
3119 static void nfs4_locku_done(struct rpc_task *task, void *data)
3121 struct nfs4_unlockdata *calldata = data;
3123 if (RPC_ASSASSINATED(task))
3125 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3126 switch (task->tk_status) {
3128 memcpy(calldata->lsp->ls_stateid.data,
3129 calldata->res.stateid.data,
3130 sizeof(calldata->lsp->ls_stateid.data));
3131 renew_lease(calldata->server, calldata->timestamp);
3133 case -NFS4ERR_STALE_STATEID:
3134 case -NFS4ERR_EXPIRED:
3137 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3138 rpc_restart_call(task);
3142 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3144 struct nfs4_unlockdata *calldata = data;
3145 struct rpc_message msg = {
3146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3147 .rpc_argp = &calldata->arg,
3148 .rpc_resp = &calldata->res,
3149 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3152 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3154 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3155 /* Note: exit _without_ running nfs4_locku_done */
3156 task->tk_action = NULL;
3159 calldata->timestamp = jiffies;
3160 rpc_call_setup(task, &msg, 0);
3163 static const struct rpc_call_ops nfs4_locku_ops = {
3164 .rpc_call_prepare = nfs4_locku_prepare,
3165 .rpc_call_done = nfs4_locku_done,
3166 .rpc_release = nfs4_locku_release_calldata,
3169 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3170 struct nfs_open_context *ctx,
3171 struct nfs4_lock_state *lsp,
3172 struct nfs_seqid *seqid)
3174 struct nfs4_unlockdata *data;
3176 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3178 nfs_free_seqid(seqid);
3179 return ERR_PTR(-ENOMEM);
3182 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3185 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3187 struct nfs_seqid *seqid;
3188 struct nfs4_lock_state *lsp;
3189 struct rpc_task *task;
3192 status = nfs4_set_lock_state(state, request);
3193 /* Unlock _before_ we do the RPC call */
3194 request->fl_flags |= FL_EXISTS;
3195 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3199 /* Is this a delegated lock? */
3200 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3202 lsp = request->fl_u.nfs4_fl.owner;
3203 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3207 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3208 status = PTR_ERR(task);
3211 status = nfs4_wait_for_completion_rpc_task(task);
3217 struct nfs4_lockdata {
3218 struct nfs_lock_args arg;
3219 struct nfs_lock_res res;
3220 struct nfs4_lock_state *lsp;
3221 struct nfs_open_context *ctx;
3222 struct file_lock fl;
3223 unsigned long timestamp;
3228 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3229 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3231 struct nfs4_lockdata *p;
3232 struct inode *inode = lsp->ls_state->inode;
3233 struct nfs_server *server = NFS_SERVER(inode);
3235 p = kzalloc(sizeof(*p), GFP_KERNEL);
3239 p->arg.fh = NFS_FH(inode);
3241 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3242 if (p->arg.lock_seqid == NULL)
3244 p->arg.lock_stateid = &lsp->ls_stateid;
3245 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3246 p->arg.lock_owner.id = lsp->ls_id;
3248 atomic_inc(&lsp->ls_count);
3249 p->ctx = get_nfs_open_context(ctx);
3250 memcpy(&p->fl, fl, sizeof(p->fl));
3257 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3259 struct nfs4_lockdata *data = calldata;
3260 struct nfs4_state *state = data->lsp->ls_state;
3261 struct nfs4_state_owner *sp = state->owner;
3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3264 .rpc_argp = &data->arg,
3265 .rpc_resp = &data->res,
3266 .rpc_cred = sp->so_cred,
3269 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3271 dprintk("%s: begin!\n", __FUNCTION__);
3272 /* Do we need to do an open_to_lock_owner? */
3273 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3274 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3275 if (data->arg.open_seqid == NULL) {
3276 data->rpc_status = -ENOMEM;
3277 task->tk_action = NULL;
3280 data->arg.open_stateid = &state->stateid;
3281 data->arg.new_lock_owner = 1;
3283 data->timestamp = jiffies;
3284 rpc_call_setup(task, &msg, 0);
3286 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3289 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3291 struct nfs4_lockdata *data = calldata;
3293 dprintk("%s: begin!\n", __FUNCTION__);
3295 data->rpc_status = task->tk_status;
3296 if (RPC_ASSASSINATED(task))
3298 if (data->arg.new_lock_owner != 0) {
3299 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3300 if (data->rpc_status == 0)
3301 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3305 if (data->rpc_status == 0) {
3306 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3307 sizeof(data->lsp->ls_stateid.data));
3308 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3309 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3311 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3313 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3316 static void nfs4_lock_release(void *calldata)
3318 struct nfs4_lockdata *data = calldata;
3320 dprintk("%s: begin!\n", __FUNCTION__);
3321 if (data->arg.open_seqid != NULL)
3322 nfs_free_seqid(data->arg.open_seqid);
3323 if (data->cancelled != 0) {
3324 struct rpc_task *task;
3325 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3326 data->arg.lock_seqid);
3329 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3331 nfs_free_seqid(data->arg.lock_seqid);
3332 nfs4_put_lock_state(data->lsp);
3333 put_nfs_open_context(data->ctx);
3335 dprintk("%s: done!\n", __FUNCTION__);
3338 static const struct rpc_call_ops nfs4_lock_ops = {
3339 .rpc_call_prepare = nfs4_lock_prepare,
3340 .rpc_call_done = nfs4_lock_done,
3341 .rpc_release = nfs4_lock_release,
3344 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3346 struct nfs4_lockdata *data;
3347 struct rpc_task *task;
3350 dprintk("%s: begin!\n", __FUNCTION__);
3351 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3352 fl->fl_u.nfs4_fl.owner);
3356 data->arg.block = 1;
3358 data->arg.reclaim = 1;
3359 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3360 &nfs4_lock_ops, data);
3362 return PTR_ERR(task);
3363 ret = nfs4_wait_for_completion_rpc_task(task);
3365 ret = data->rpc_status;
3366 if (ret == -NFS4ERR_DENIED)
3369 data->cancelled = 1;
3371 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3375 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3377 struct nfs_server *server = NFS_SERVER(state->inode);
3378 struct nfs4_exception exception = { };
3382 /* Cache the lock if possible... */
3383 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3385 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3386 if (err != -NFS4ERR_DELAY)
3388 nfs4_handle_exception(server, err, &exception);
3389 } while (exception.retry);
3393 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3395 struct nfs_server *server = NFS_SERVER(state->inode);
3396 struct nfs4_exception exception = { };
3399 err = nfs4_set_lock_state(state, request);
3403 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3405 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3406 if (err != -NFS4ERR_DELAY)
3408 nfs4_handle_exception(server, err, &exception);
3409 } while (exception.retry);
3413 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3415 struct nfs_client *clp = state->owner->so_client;
3416 unsigned char fl_flags = request->fl_flags;
3419 /* Is this a delegated open? */
3420 status = nfs4_set_lock_state(state, request);
3423 request->fl_flags |= FL_ACCESS;
3424 status = do_vfs_lock(request->fl_file, request);
3427 down_read(&clp->cl_sem);
3428 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3429 struct nfs_inode *nfsi = NFS_I(state->inode);
3430 /* Yes: cache locks! */
3431 down_read(&nfsi->rwsem);
3432 /* ...but avoid races with delegation recall... */
3433 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3434 request->fl_flags = fl_flags & ~FL_SLEEP;
3435 status = do_vfs_lock(request->fl_file, request);
3436 up_read(&nfsi->rwsem);
3439 up_read(&nfsi->rwsem);
3441 status = _nfs4_do_setlk(state, cmd, request, 0);
3444 /* Note: we always want to sleep here! */
3445 request->fl_flags = fl_flags | FL_SLEEP;
3446 if (do_vfs_lock(request->fl_file, request) < 0)
3447 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3449 up_read(&clp->cl_sem);
3451 request->fl_flags = fl_flags;
3455 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3457 struct nfs4_exception exception = { };
3461 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3462 _nfs4_proc_setlk(state, cmd, request),
3464 } while (exception.retry);
3469 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3471 struct nfs_open_context *ctx;
3472 struct nfs4_state *state;
3473 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3476 /* verify open state */
3477 ctx = (struct nfs_open_context *)filp->private_data;
3480 if (request->fl_start < 0 || request->fl_end < 0)
3484 return nfs4_proc_getlk(state, F_GETLK, request);
3486 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3489 if (request->fl_type == F_UNLCK)
3490 return nfs4_proc_unlck(state, cmd, request);
3493 status = nfs4_proc_setlk(state, cmd, request);
3494 if ((status != -EAGAIN) || IS_SETLK(cmd))
3496 timeout = nfs4_set_lock_task_retry(timeout);
3497 status = -ERESTARTSYS;
3500 } while(status < 0);
3504 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3506 struct nfs_server *server = NFS_SERVER(state->inode);
3507 struct nfs4_exception exception = { };
3510 err = nfs4_set_lock_state(state, fl);
3514 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3515 if (err != -NFS4ERR_DELAY)
3517 err = nfs4_handle_exception(server, err, &exception);
3518 } while (exception.retry);
3523 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3525 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3526 size_t buflen, int flags)
3528 struct inode *inode = dentry->d_inode;
3530 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3533 if (!S_ISREG(inode->i_mode) &&
3534 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3537 return nfs4_proc_set_acl(inode, buf, buflen);
3540 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3541 * and that's what we'll do for e.g. user attributes that haven't been set.
3542 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3543 * attributes in kernel-managed attribute namespaces. */
3544 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3547 struct inode *inode = dentry->d_inode;
3549 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3552 return nfs4_proc_get_acl(inode, buf, buflen);
3555 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3557 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3559 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3561 if (buf && buflen < len)
3564 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3568 int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
3569 struct nfs4_fs_locations *fs_locations, struct page *page)
3571 struct nfs_server *server = NFS_SERVER(dir);
3573 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3574 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3576 struct nfs4_fs_locations_arg args = {
3577 .dir_fh = NFS_FH(dir),
3582 struct rpc_message msg = {
3583 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3585 .rpc_resp = fs_locations,
3589 dprintk("%s: start\n", __FUNCTION__);
3590 nfs_fattr_init(&fs_locations->fattr);
3591 fs_locations->server = server;
3592 fs_locations->nlocations = 0;
3593 status = rpc_call_sync(server->client, &msg, 0);
3594 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3598 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3599 .recover_open = nfs4_open_reclaim,
3600 .recover_lock = nfs4_lock_reclaim,
3603 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3604 .recover_open = nfs4_open_expired,
3605 .recover_lock = nfs4_lock_expired,
3608 static const struct inode_operations nfs4_file_inode_operations = {
3609 .permission = nfs_permission,
3610 .getattr = nfs_getattr,
3611 .setattr = nfs_setattr,
3612 .getxattr = nfs4_getxattr,
3613 .setxattr = nfs4_setxattr,
3614 .listxattr = nfs4_listxattr,
3617 const struct nfs_rpc_ops nfs_v4_clientops = {
3618 .version = 4, /* protocol version */
3619 .dentry_ops = &nfs4_dentry_operations,
3620 .dir_inode_ops = &nfs4_dir_inode_operations,
3621 .file_inode_ops = &nfs4_file_inode_operations,
3622 .getroot = nfs4_proc_get_root,
3623 .getattr = nfs4_proc_getattr,
3624 .setattr = nfs4_proc_setattr,
3625 .lookupfh = nfs4_proc_lookupfh,
3626 .lookup = nfs4_proc_lookup,
3627 .access = nfs4_proc_access,
3628 .readlink = nfs4_proc_readlink,
3629 .create = nfs4_proc_create,
3630 .remove = nfs4_proc_remove,
3631 .unlink_setup = nfs4_proc_unlink_setup,
3632 .unlink_done = nfs4_proc_unlink_done,
3633 .rename = nfs4_proc_rename,
3634 .link = nfs4_proc_link,
3635 .symlink = nfs4_proc_symlink,
3636 .mkdir = nfs4_proc_mkdir,
3637 .rmdir = nfs4_proc_remove,
3638 .readdir = nfs4_proc_readdir,
3639 .mknod = nfs4_proc_mknod,
3640 .statfs = nfs4_proc_statfs,
3641 .fsinfo = nfs4_proc_fsinfo,
3642 .pathconf = nfs4_proc_pathconf,
3643 .set_capabilities = nfs4_server_capabilities,
3644 .decode_dirent = nfs4_decode_dirent,
3645 .read_setup = nfs4_proc_read_setup,
3646 .read_done = nfs4_read_done,
3647 .write_setup = nfs4_proc_write_setup,
3648 .write_done = nfs4_write_done,
3649 .commit_setup = nfs4_proc_commit_setup,
3650 .commit_done = nfs4_commit_done,
3651 .file_open = nfs_open,
3652 .file_release = nfs_release,
3653 .lock = nfs4_proc_lock,
3654 .clear_acl_cache = nfs4_zap_acl_attr,