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;
224 struct dentry *dentry;
226 struct nfs4_state_owner *owner;
228 unsigned long timestamp;
233 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
237 struct dentry *parent = dget_parent(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 atomic_set(&p->count, 1);
249 p->dentry = dget(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 = &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;
285 static void nfs4_opendata_free(struct nfs4_opendata *p)
287 if (p != NULL && atomic_dec_and_test(&p->count)) {
288 nfs_free_seqid(p->o_arg.seqid);
289 nfs4_put_state_owner(p->owner);
296 /* Helper for asynchronous RPC calls */
297 static int nfs4_call_async(struct rpc_clnt *clnt,
298 const struct rpc_call_ops *tk_ops, void *calldata)
300 struct rpc_task *task;
302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
308 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
313 rpc_clnt_sigmask(task->tk_client, &oldset);
314 ret = rpc_wait_for_completion_task(task);
315 rpc_clnt_sigunmask(task->tk_client, &oldset);
319 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
321 switch (open_flags) {
328 case FMODE_READ|FMODE_WRITE:
333 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
335 struct inode *inode = state->inode;
337 open_flags &= (FMODE_READ|FMODE_WRITE);
338 /* Protect against nfs4_find_state_byowner() */
339 spin_lock(&state->owner->so_lock);
340 spin_lock(&inode->i_lock);
341 memcpy(&state->stateid, stateid, sizeof(state->stateid));
342 update_open_stateflags(state, open_flags);
343 nfs4_state_set_mode_locked(state, state->state | open_flags);
344 spin_unlock(&inode->i_lock);
345 spin_unlock(&state->owner->so_lock);
348 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
351 struct nfs4_state *state = NULL;
353 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
358 state = nfs4_get_open_state(inode, data->owner);
361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
368 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
370 struct nfs_inode *nfsi = NFS_I(state->inode);
371 struct nfs_open_context *ctx;
373 spin_lock(&state->inode->i_lock);
374 list_for_each_entry(ctx, &nfsi->open_files, list) {
375 if (ctx->state != state)
377 get_nfs_open_context(ctx);
378 spin_unlock(&state->inode->i_lock);
381 spin_unlock(&state->inode->i_lock);
382 return ERR_PTR(-ENOENT);
385 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
389 opendata->o_arg.open_flags = openflags;
390 ret = _nfs4_proc_open(opendata);
393 memcpy(stateid->data, opendata->o_res.stateid.data,
394 sizeof(stateid->data));
398 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
400 nfs4_stateid stateid;
401 struct nfs4_state *newstate;
406 /* memory barrier prior to reading state->n_* */
408 if (state->n_rdwr != 0) {
409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
412 mode |= FMODE_READ|FMODE_WRITE;
413 if (opendata->o_res.delegation_type != 0)
414 delegation = opendata->o_res.delegation_type;
417 if (state->n_wronly != 0) {
418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
422 if (opendata->o_res.delegation_type != 0)
423 delegation = opendata->o_res.delegation_type;
426 if (state->n_rdonly != 0) {
427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
432 clear_bit(NFS_DELEGATED_STATE, &state->flags);
435 if (opendata->o_res.delegation_type == 0)
436 opendata->o_res.delegation_type = delegation;
437 opendata->o_arg.open_flags |= mode;
438 newstate = nfs4_opendata_to_nfs4_state(opendata);
439 if (newstate != NULL) {
440 if (opendata->o_res.delegation_type != 0) {
441 struct nfs_inode *nfsi = NFS_I(newstate->inode);
442 int delegation_flags = 0;
443 if (nfsi->delegation)
444 delegation_flags = nfsi->delegation->flags;
445 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
446 nfs_inode_set_delegation(newstate->inode,
447 opendata->owner->so_cred,
450 nfs_inode_reclaim_delegation(newstate->inode,
451 opendata->owner->so_cred,
454 nfs4_close_state(newstate, opendata->o_arg.open_flags);
456 if (newstate != state)
463 * reclaim state on the server after a reboot.
465 static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
468 struct nfs4_opendata *opendata;
469 int delegation_type = 0;
472 if (delegation != NULL) {
473 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
474 memcpy(&state->stateid, &delegation->stateid,
475 sizeof(state->stateid));
476 set_bit(NFS_DELEGATED_STATE, &state->flags);
479 delegation_type = delegation->type;
481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
482 if (opendata == NULL)
484 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
485 opendata->o_arg.fh = NFS_FH(state->inode);
486 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
487 opendata->o_arg.u.delegation_type = delegation_type;
488 status = nfs4_open_recover(opendata, state);
489 nfs4_opendata_free(opendata);
493 static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
495 struct nfs_server *server = NFS_SERVER(state->inode);
496 struct nfs4_exception exception = { };
499 err = _nfs4_do_open_reclaim(sp, state, dentry);
500 if (err != -NFS4ERR_DELAY)
502 nfs4_handle_exception(server, err, &exception);
503 } while (exception.retry);
507 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
509 struct nfs_open_context *ctx;
512 ctx = nfs4_state_find_open_context(state);
515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
516 put_nfs_open_context(ctx);
520 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
522 struct nfs4_state_owner *sp = state->owner;
523 struct nfs4_opendata *opendata;
526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
529 if (opendata == NULL)
531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
533 sizeof(opendata->o_arg.u.delegation.data));
534 ret = nfs4_open_recover(opendata, state);
535 nfs4_opendata_free(opendata);
539 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
541 struct nfs4_exception exception = { };
542 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
545 err = _nfs4_open_delegation_recall(dentry, state);
549 case -NFS4ERR_STALE_CLIENTID:
550 case -NFS4ERR_STALE_STATEID:
551 case -NFS4ERR_EXPIRED:
552 /* Don't recall a delegation if it was lost */
553 nfs4_schedule_state_recovery(server->nfs_client);
556 err = nfs4_handle_exception(server, err, &exception);
557 } while (exception.retry);
561 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
563 struct nfs4_opendata *data = calldata;
564 struct rpc_message msg = {
565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
566 .rpc_argp = &data->c_arg,
567 .rpc_resp = &data->c_res,
568 .rpc_cred = data->owner->so_cred,
570 data->timestamp = jiffies;
571 rpc_call_setup(task, &msg, 0);
574 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
576 struct nfs4_opendata *data = calldata;
578 data->rpc_status = task->tk_status;
579 if (RPC_ASSASSINATED(task))
581 if (data->rpc_status == 0) {
582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
583 sizeof(data->o_res.stateid.data));
584 renew_lease(data->o_res.server, data->timestamp);
586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
590 static void nfs4_open_confirm_release(void *calldata)
592 struct nfs4_opendata *data = calldata;
593 struct nfs4_state *state = NULL;
595 /* If this request hasn't been cancelled, do nothing */
596 if (data->cancelled == 0)
598 /* In case of error, no cleanup! */
599 if (data->rpc_status != 0)
601 nfs_confirm_seqid(&data->owner->so_seqid, 0);
602 state = nfs4_opendata_to_nfs4_state(data);
604 nfs4_close_state(state, data->o_arg.open_flags);
606 nfs4_opendata_free(data);
609 static const struct rpc_call_ops nfs4_open_confirm_ops = {
610 .rpc_call_prepare = nfs4_open_confirm_prepare,
611 .rpc_call_done = nfs4_open_confirm_done,
612 .rpc_release = nfs4_open_confirm_release,
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
618 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
621 struct rpc_task *task;
624 atomic_inc(&data->count);
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
629 data->rpc_status = -ENOMEM;
630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
632 return PTR_ERR(task);
633 status = nfs4_wait_for_completion_rpc_task(task);
638 status = data->rpc_status;
643 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
645 struct nfs4_opendata *data = calldata;
646 struct nfs4_state_owner *sp = data->owner;
647 struct rpc_message msg = {
648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
649 .rpc_argp = &data->o_arg,
650 .rpc_resp = &data->o_res,
651 .rpc_cred = sp->so_cred,
654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
656 /* Update sequence id. */
657 data->o_arg.id = sp->so_id;
658 data->o_arg.clientid = sp->so_client->cl_clientid;
659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
661 data->timestamp = jiffies;
662 rpc_call_setup(task, &msg, 0);
665 static void nfs4_open_done(struct rpc_task *task, void *calldata)
667 struct nfs4_opendata *data = calldata;
669 data->rpc_status = task->tk_status;
670 if (RPC_ASSASSINATED(task))
672 if (task->tk_status == 0) {
673 switch (data->o_res.f_attr->mode & S_IFMT) {
677 data->rpc_status = -ELOOP;
680 data->rpc_status = -EISDIR;
683 data->rpc_status = -ENOTDIR;
685 renew_lease(data->o_res.server, data->timestamp);
687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
690 static void nfs4_open_release(void *calldata)
692 struct nfs4_opendata *data = calldata;
693 struct nfs4_state *state = NULL;
695 /* If this request hasn't been cancelled, do nothing */
696 if (data->cancelled == 0)
698 /* In case of error, no cleanup! */
699 if (data->rpc_status != 0)
701 /* In case we need an open_confirm, no cleanup! */
702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
705 state = nfs4_opendata_to_nfs4_state(data);
707 nfs4_close_state(state, data->o_arg.open_flags);
709 nfs4_opendata_free(data);
712 static const struct rpc_call_ops nfs4_open_ops = {
713 .rpc_call_prepare = nfs4_open_prepare,
714 .rpc_call_done = nfs4_open_done,
715 .rpc_release = nfs4_open_release,
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
721 static int _nfs4_proc_open(struct nfs4_opendata *data)
723 struct inode *dir = data->dir->d_inode;
724 struct nfs_server *server = NFS_SERVER(dir);
725 struct nfs_openargs *o_arg = &data->o_arg;
726 struct nfs_openres *o_res = &data->o_res;
727 struct rpc_task *task;
730 atomic_inc(&data->count);
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
735 data->rpc_status = -ENOMEM;
736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
738 return PTR_ERR(task);
739 status = nfs4_wait_for_completion_rpc_task(task);
744 status = data->rpc_status;
749 if (o_arg->open_flags & O_CREAT) {
750 update_changeattr(dir, &o_res->cinfo);
751 nfs_post_op_update_inode(dir, o_res->dir_attr);
753 nfs_refresh_inode(dir, o_res->dir_attr);
754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
755 status = _nfs4_proc_open_confirm(data);
759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
761 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
765 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
767 struct nfs_access_entry cache;
771 if (openflags & FMODE_READ)
773 if (openflags & FMODE_WRITE)
775 status = nfs_access_get_cached(inode, cred, &cache);
779 /* Be clever: ask server to check for all possible rights */
780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
782 cache.jiffies = jiffies;
783 status = _nfs4_proc_access(inode, &cache);
786 nfs_access_add_cache(inode, &cache);
788 if ((cache.mask & mask) == mask)
793 int nfs4_recover_expired_lease(struct nfs_server *server)
795 struct nfs_client *clp = server->nfs_client;
799 ret = nfs4_wait_clnt_recover(server->client, clp);
802 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
804 nfs4_schedule_state_recovery(clp);
811 * reclaim state on the server after a network partition.
812 * Assumes caller holds the appropriate lock
814 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
816 struct inode *inode = state->inode;
817 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
818 struct nfs4_opendata *opendata;
819 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
822 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
823 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
826 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
827 set_bit(NFS_DELEGATED_STATE, &state->flags);
830 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
831 if (opendata == NULL)
833 ret = nfs4_open_recover(opendata, state);
834 if (ret == -ESTALE) {
835 /* Invalidate the state owner so we don't ever use it again */
836 nfs4_drop_state_owner(sp);
839 nfs4_opendata_free(opendata);
843 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
845 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
846 struct nfs4_exception exception = { };
850 err = _nfs4_open_expired(sp, state, dentry);
851 if (err == -NFS4ERR_DELAY)
852 nfs4_handle_exception(server, err, &exception);
853 } while (exception.retry);
857 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
859 struct nfs_open_context *ctx;
862 ctx = nfs4_state_find_open_context(state);
865 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
866 put_nfs_open_context(ctx);
871 * Returns a referenced nfs4_state if there is an open delegation on the file
873 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
875 struct nfs_delegation *delegation;
876 struct nfs_server *server = NFS_SERVER(inode);
877 struct nfs_client *clp = server->nfs_client;
878 struct nfs_inode *nfsi = NFS_I(inode);
879 struct nfs4_state_owner *sp = NULL;
880 struct nfs4_state *state = NULL;
881 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
885 if (!(sp = nfs4_get_state_owner(server, cred))) {
886 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
889 err = nfs4_recover_expired_lease(server);
891 goto out_put_state_owner;
892 /* Protect against reboot recovery - NOTE ORDER! */
893 down_read(&clp->cl_sem);
894 /* Protect against delegation recall */
895 down_read(&nfsi->rwsem);
896 delegation = NFS_I(inode)->delegation;
898 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
901 state = nfs4_get_open_state(inode, sp);
906 if ((state->state & open_flags) == open_flags) {
907 spin_lock(&inode->i_lock);
908 update_open_stateflags(state, open_flags);
909 spin_unlock(&inode->i_lock);
911 } else if (state->state != 0)
912 goto out_put_open_state;
915 err = _nfs4_do_access(inode, cred, open_flags);
918 goto out_put_open_state;
919 set_bit(NFS_DELEGATED_STATE, &state->flags);
920 update_open_stateid(state, &delegation->stateid, open_flags);
922 nfs4_put_state_owner(sp);
923 up_read(&nfsi->rwsem);
924 up_read(&clp->cl_sem);
928 nfs4_put_open_state(state);
930 up_read(&nfsi->rwsem);
931 up_read(&clp->cl_sem);
933 nfs_inode_return_delegation(inode);
935 nfs4_put_state_owner(sp);
939 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
941 struct nfs4_exception exception = { };
942 struct nfs4_state *res = ERR_PTR(-EIO);
946 err = _nfs4_open_delegated(inode, flags, cred, &res);
949 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
951 } while (exception.retry);
956 * Returns a referenced nfs4_state
958 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
960 struct nfs4_state_owner *sp;
961 struct nfs4_state *state = NULL;
962 struct nfs_server *server = NFS_SERVER(dir);
963 struct nfs_client *clp = server->nfs_client;
964 struct nfs4_opendata *opendata;
967 /* Protect against reboot recovery conflicts */
969 if (!(sp = nfs4_get_state_owner(server, cred))) {
970 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
973 status = nfs4_recover_expired_lease(server);
975 goto err_put_state_owner;
976 down_read(&clp->cl_sem);
978 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
979 if (opendata == NULL)
980 goto err_release_rwsem;
982 status = _nfs4_proc_open(opendata);
984 goto err_opendata_free;
987 state = nfs4_opendata_to_nfs4_state(opendata);
989 goto err_opendata_free;
990 if (opendata->o_res.delegation_type != 0)
991 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
992 nfs4_opendata_free(opendata);
993 nfs4_put_state_owner(sp);
994 up_read(&clp->cl_sem);
998 nfs4_opendata_free(opendata);
1000 up_read(&clp->cl_sem);
1001 err_put_state_owner:
1002 nfs4_put_state_owner(sp);
1009 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1011 struct nfs4_exception exception = { };
1012 struct nfs4_state *res;
1016 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1019 /* NOTE: BAD_SEQID means the server and client disagree about the
1020 * book-keeping w.r.t. state-changing operations
1021 * (OPEN/CLOSE/LOCK/LOCKU...)
1022 * It is actually a sign of a bug on the client or on the server.
1024 * If we receive a BAD_SEQID error in the particular case of
1025 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1026 * have unhashed the old state_owner for us, and that we can
1027 * therefore safely retry using a new one. We should still warn
1028 * the user though...
1030 if (status == -NFS4ERR_BAD_SEQID) {
1031 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1032 exception.retry = 1;
1036 * BAD_STATEID on OPEN means that the server cancelled our
1037 * state before it received the OPEN_CONFIRM.
1038 * Recover by retrying the request as per the discussion
1039 * on Page 181 of RFC3530.
1041 if (status == -NFS4ERR_BAD_STATEID) {
1042 exception.retry = 1;
1045 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1046 status, &exception));
1047 } while (exception.retry);
1051 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1052 struct iattr *sattr, struct nfs4_state *state)
1054 struct nfs_server *server = NFS_SERVER(inode);
1055 struct nfs_setattrargs arg = {
1056 .fh = NFS_FH(inode),
1059 .bitmask = server->attr_bitmask,
1061 struct nfs_setattrres res = {
1065 struct rpc_message msg = {
1066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1070 unsigned long timestamp = jiffies;
1073 nfs_fattr_init(fattr);
1075 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1076 /* Use that stateid */
1077 } else if (state != NULL) {
1078 msg.rpc_cred = state->owner->so_cred;
1079 nfs4_copy_stateid(&arg.stateid, state, current->files);
1081 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1083 status = rpc_call_sync(server->client, &msg, 0);
1084 if (status == 0 && state != NULL)
1085 renew_lease(server, timestamp);
1089 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1090 struct iattr *sattr, struct nfs4_state *state)
1092 struct nfs_server *server = NFS_SERVER(inode);
1093 struct nfs4_exception exception = { };
1096 err = nfs4_handle_exception(server,
1097 _nfs4_do_setattr(inode, fattr, sattr, state),
1099 } while (exception.retry);
1103 struct nfs4_closedata {
1104 struct inode *inode;
1105 struct nfs4_state *state;
1106 struct nfs_closeargs arg;
1107 struct nfs_closeres res;
1108 struct nfs_fattr fattr;
1109 unsigned long timestamp;
1112 static void nfs4_free_closedata(void *data)
1114 struct nfs4_closedata *calldata = data;
1115 struct nfs4_state_owner *sp = calldata->state->owner;
1117 nfs4_put_open_state(calldata->state);
1118 nfs_free_seqid(calldata->arg.seqid);
1119 nfs4_put_state_owner(sp);
1123 static void nfs4_close_done(struct rpc_task *task, void *data)
1125 struct nfs4_closedata *calldata = data;
1126 struct nfs4_state *state = calldata->state;
1127 struct nfs_server *server = NFS_SERVER(calldata->inode);
1129 if (RPC_ASSASSINATED(task))
1131 /* hmm. we are done with the inode, and in the process of freeing
1132 * the state_owner. we keep this around to process errors
1134 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1135 switch (task->tk_status) {
1137 memcpy(&state->stateid, &calldata->res.stateid,
1138 sizeof(state->stateid));
1139 renew_lease(server, calldata->timestamp);
1141 case -NFS4ERR_STALE_STATEID:
1142 case -NFS4ERR_EXPIRED:
1143 nfs4_schedule_state_recovery(server->nfs_client);
1146 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1147 rpc_restart_call(task);
1151 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1154 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1156 struct nfs4_closedata *calldata = data;
1157 struct nfs4_state *state = calldata->state;
1158 struct rpc_message msg = {
1159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1160 .rpc_argp = &calldata->arg,
1161 .rpc_resp = &calldata->res,
1162 .rpc_cred = state->owner->so_cred,
1164 int mode = 0, old_mode;
1166 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1168 /* Recalculate the new open mode in case someone reopened the file
1169 * while we were waiting in line to be scheduled.
1171 spin_lock(&state->owner->so_lock);
1172 spin_lock(&calldata->inode->i_lock);
1173 mode = old_mode = state->state;
1174 if (state->n_rdwr == 0) {
1175 if (state->n_rdonly == 0)
1176 mode &= ~FMODE_READ;
1177 if (state->n_wronly == 0)
1178 mode &= ~FMODE_WRITE;
1180 nfs4_state_set_mode_locked(state, mode);
1181 spin_unlock(&calldata->inode->i_lock);
1182 spin_unlock(&state->owner->so_lock);
1183 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1184 /* Note: exit _without_ calling nfs4_close_done */
1185 task->tk_action = NULL;
1188 nfs_fattr_init(calldata->res.fattr);
1190 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1191 calldata->arg.open_flags = mode;
1192 calldata->timestamp = jiffies;
1193 rpc_call_setup(task, &msg, 0);
1196 static const struct rpc_call_ops nfs4_close_ops = {
1197 .rpc_call_prepare = nfs4_close_prepare,
1198 .rpc_call_done = nfs4_close_done,
1199 .rpc_release = nfs4_free_closedata,
1203 * It is possible for data to be read/written from a mem-mapped file
1204 * after the sys_close call (which hits the vfs layer as a flush).
1205 * This means that we can't safely call nfsv4 close on a file until
1206 * the inode is cleared. This in turn means that we are not good
1207 * NFSv4 citizens - we do not indicate to the server to update the file's
1208 * share state even when we are done with one of the three share
1209 * stateid's in the inode.
1211 * NOTE: Caller must be holding the sp->so_owner semaphore!
1213 int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1215 struct nfs_server *server = NFS_SERVER(inode);
1216 struct nfs4_closedata *calldata;
1217 int status = -ENOMEM;
1219 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1220 if (calldata == NULL)
1222 calldata->inode = inode;
1223 calldata->state = state;
1224 calldata->arg.fh = NFS_FH(inode);
1225 calldata->arg.stateid = &state->stateid;
1226 /* Serialization for the sequence id */
1227 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1228 if (calldata->arg.seqid == NULL)
1229 goto out_free_calldata;
1230 calldata->arg.bitmask = server->attr_bitmask;
1231 calldata->res.fattr = &calldata->fattr;
1232 calldata->res.server = server;
1234 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
1238 nfs_free_seqid(calldata->arg.seqid);
1245 static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1249 filp = lookup_instantiate_filp(nd, dentry, NULL);
1250 if (!IS_ERR(filp)) {
1251 struct nfs_open_context *ctx;
1252 ctx = (struct nfs_open_context *)filp->private_data;
1256 nfs4_close_state(state, nd->intent.open.flags);
1257 return PTR_ERR(filp);
1261 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1264 struct rpc_cred *cred;
1265 struct nfs4_state *state;
1268 if (nd->flags & LOOKUP_CREATE) {
1269 attr.ia_mode = nd->intent.open.create_mode;
1270 attr.ia_valid = ATTR_MODE;
1271 if (!IS_POSIXACL(dir))
1272 attr.ia_mode &= ~current->fs->umask;
1275 BUG_ON(nd->intent.open.flags & O_CREAT);
1278 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1280 return (struct dentry *)cred;
1281 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1283 if (IS_ERR(state)) {
1284 if (PTR_ERR(state) == -ENOENT)
1285 d_add(dentry, NULL);
1286 return (struct dentry *)state;
1288 res = d_add_unique(dentry, igrab(state->inode));
1291 nfs4_intent_set_file(nd, dentry, state);
1296 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1298 struct rpc_cred *cred;
1299 struct nfs4_state *state;
1301 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1303 return PTR_ERR(cred);
1304 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1306 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1308 if (IS_ERR(state)) {
1309 switch (PTR_ERR(state)) {
1315 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1321 if (state->inode == dentry->d_inode) {
1322 nfs4_intent_set_file(nd, dentry, state);
1325 nfs4_close_state(state, openflags);
1332 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1334 struct nfs4_server_caps_res res = {};
1335 struct rpc_message msg = {
1336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1337 .rpc_argp = fhandle,
1342 status = rpc_call_sync(server->client, &msg, 0);
1344 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1345 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1346 server->caps |= NFS_CAP_ACLS;
1347 if (res.has_links != 0)
1348 server->caps |= NFS_CAP_HARDLINKS;
1349 if (res.has_symlinks != 0)
1350 server->caps |= NFS_CAP_SYMLINKS;
1351 server->acl_bitmask = res.acl_bitmask;
1356 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1358 struct nfs4_exception exception = { };
1361 err = nfs4_handle_exception(server,
1362 _nfs4_server_capabilities(server, fhandle),
1364 } while (exception.retry);
1368 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1369 struct nfs_fsinfo *info)
1371 struct nfs4_lookup_root_arg args = {
1372 .bitmask = nfs4_fattr_bitmap,
1374 struct nfs4_lookup_res res = {
1376 .fattr = info->fattr,
1379 struct rpc_message msg = {
1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1384 nfs_fattr_init(info->fattr);
1385 return rpc_call_sync(server->client, &msg, 0);
1388 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1389 struct nfs_fsinfo *info)
1391 struct nfs4_exception exception = { };
1394 err = nfs4_handle_exception(server,
1395 _nfs4_lookup_root(server, fhandle, info),
1397 } while (exception.retry);
1402 * get the file handle for the "/" directory on the server
1404 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1405 struct nfs_fsinfo *info)
1409 status = nfs4_lookup_root(server, fhandle, info);
1411 status = nfs4_server_capabilities(server, fhandle);
1413 status = nfs4_do_fsinfo(server, fhandle, info);
1414 return nfs4_map_errors(status);
1418 * Get locations and (maybe) other attributes of a referral.
1419 * Note that we'll actually follow the referral later when
1420 * we detect fsid mismatch in inode revalidation
1422 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1424 int status = -ENOMEM;
1425 struct page *page = NULL;
1426 struct nfs4_fs_locations *locations = NULL;
1428 page = alloc_page(GFP_KERNEL);
1431 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1432 if (locations == NULL)
1435 status = nfs4_proc_fs_locations(dir, name, locations, page);
1438 /* Make sure server returned a different fsid for the referral */
1439 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1440 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1445 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1446 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1448 fattr->mode = S_IFDIR;
1449 memset(fhandle, 0, sizeof(struct nfs_fh));
1458 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1460 struct nfs4_getattr_arg args = {
1462 .bitmask = server->attr_bitmask,
1464 struct nfs4_getattr_res res = {
1468 struct rpc_message msg = {
1469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1474 nfs_fattr_init(fattr);
1475 return rpc_call_sync(server->client, &msg, 0);
1478 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1480 struct nfs4_exception exception = { };
1483 err = nfs4_handle_exception(server,
1484 _nfs4_proc_getattr(server, fhandle, fattr),
1486 } while (exception.retry);
1491 * The file is not closed if it is opened due to the a request to change
1492 * the size of the file. The open call will not be needed once the
1493 * VFS layer lookup-intents are implemented.
1495 * Close is called when the inode is destroyed.
1496 * If we haven't opened the file for O_WRONLY, we
1497 * need to in the size_change case to obtain a stateid.
1500 * Because OPEN is always done by name in nfsv4, it is
1501 * possible that we opened a different file by the same
1502 * name. We can recognize this race condition, but we
1503 * can't do anything about it besides returning an error.
1505 * This will be fixed with VFS changes (lookup-intent).
1508 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1509 struct iattr *sattr)
1511 struct rpc_cred *cred;
1512 struct inode *inode = dentry->d_inode;
1513 struct nfs_open_context *ctx;
1514 struct nfs4_state *state = NULL;
1517 nfs_fattr_init(fattr);
1519 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1521 return PTR_ERR(cred);
1523 /* Search for an existing open(O_WRITE) file */
1524 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1528 status = nfs4_do_setattr(inode, fattr, sattr, state);
1530 nfs_setattr_update_inode(inode, sattr);
1532 put_nfs_open_context(ctx);
1537 static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1538 struct qstr *name, struct nfs_fh *fhandle,
1539 struct nfs_fattr *fattr)
1542 struct nfs4_lookup_arg args = {
1543 .bitmask = server->attr_bitmask,
1547 struct nfs4_lookup_res res = {
1552 struct rpc_message msg = {
1553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1558 nfs_fattr_init(fattr);
1560 dprintk("NFS call lookupfh %s\n", name->name);
1561 status = rpc_call_sync(server->client, &msg, 0);
1562 dprintk("NFS reply lookupfh: %d\n", status);
1563 if (status == -NFS4ERR_MOVED)
1568 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1569 struct qstr *name, struct nfs_fh *fhandle,
1570 struct nfs_fattr *fattr)
1572 struct nfs4_exception exception = { };
1575 err = nfs4_handle_exception(server,
1576 _nfs4_proc_lookupfh(server, dirfh, name,
1579 } while (exception.retry);
1583 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1584 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1587 struct nfs_server *server = NFS_SERVER(dir);
1588 struct nfs4_lookup_arg args = {
1589 .bitmask = server->attr_bitmask,
1590 .dir_fh = NFS_FH(dir),
1593 struct nfs4_lookup_res res = {
1598 struct rpc_message msg = {
1599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1604 nfs_fattr_init(fattr);
1606 dprintk("NFS call lookup %s\n", name->name);
1607 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1608 if (status == -NFS4ERR_MOVED)
1609 status = nfs4_get_referral(dir, name, fattr, fhandle);
1610 dprintk("NFS reply lookup: %d\n", status);
1614 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1616 struct nfs4_exception exception = { };
1619 err = nfs4_handle_exception(NFS_SERVER(dir),
1620 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1622 } while (exception.retry);
1626 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1628 struct nfs4_accessargs args = {
1629 .fh = NFS_FH(inode),
1631 struct nfs4_accessres res = { 0 };
1632 struct rpc_message msg = {
1633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1636 .rpc_cred = entry->cred,
1638 int mode = entry->mask;
1642 * Determine which access bits we want to ask for...
1644 if (mode & MAY_READ)
1645 args.access |= NFS4_ACCESS_READ;
1646 if (S_ISDIR(inode->i_mode)) {
1647 if (mode & MAY_WRITE)
1648 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1649 if (mode & MAY_EXEC)
1650 args.access |= NFS4_ACCESS_LOOKUP;
1652 if (mode & MAY_WRITE)
1653 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1654 if (mode & MAY_EXEC)
1655 args.access |= NFS4_ACCESS_EXECUTE;
1657 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1660 if (res.access & NFS4_ACCESS_READ)
1661 entry->mask |= MAY_READ;
1662 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1663 entry->mask |= MAY_WRITE;
1664 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1665 entry->mask |= MAY_EXEC;
1670 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1672 struct nfs4_exception exception = { };
1675 err = nfs4_handle_exception(NFS_SERVER(inode),
1676 _nfs4_proc_access(inode, entry),
1678 } while (exception.retry);
1683 * TODO: For the time being, we don't try to get any attributes
1684 * along with any of the zero-copy operations READ, READDIR,
1687 * In the case of the first three, we want to put the GETATTR
1688 * after the read-type operation -- this is because it is hard
1689 * to predict the length of a GETATTR response in v4, and thus
1690 * align the READ data correctly. This means that the GETATTR
1691 * may end up partially falling into the page cache, and we should
1692 * shift it into the 'tail' of the xdr_buf before processing.
1693 * To do this efficiently, we need to know the total length
1694 * of data received, which doesn't seem to be available outside
1697 * In the case of WRITE, we also want to put the GETATTR after
1698 * the operation -- in this case because we want to make sure
1699 * we get the post-operation mtime and size. This means that
1700 * we can't use xdr_encode_pages() as written: we need a variant
1701 * of it which would leave room in the 'tail' iovec.
1703 * Both of these changes to the XDR layer would in fact be quite
1704 * minor, but I decided to leave them for a subsequent patch.
1706 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1707 unsigned int pgbase, unsigned int pglen)
1709 struct nfs4_readlink args = {
1710 .fh = NFS_FH(inode),
1715 struct rpc_message msg = {
1716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1721 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1724 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1725 unsigned int pgbase, unsigned int pglen)
1727 struct nfs4_exception exception = { };
1730 err = nfs4_handle_exception(NFS_SERVER(inode),
1731 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1733 } while (exception.retry);
1737 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1739 int flags = rdata->flags;
1740 struct inode *inode = rdata->inode;
1741 struct nfs_fattr *fattr = rdata->res.fattr;
1742 struct nfs_server *server = NFS_SERVER(inode);
1743 struct rpc_message msg = {
1744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1745 .rpc_argp = &rdata->args,
1746 .rpc_resp = &rdata->res,
1747 .rpc_cred = rdata->cred,
1749 unsigned long timestamp = jiffies;
1752 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1753 (long long) rdata->args.offset);
1755 nfs_fattr_init(fattr);
1756 status = rpc_call_sync(server->client, &msg, flags);
1758 renew_lease(server, timestamp);
1759 dprintk("NFS reply read: %d\n", status);
1763 static int nfs4_proc_read(struct nfs_read_data *rdata)
1765 struct nfs4_exception exception = { };
1768 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1769 _nfs4_proc_read(rdata),
1771 } while (exception.retry);
1777 * We will need to arrange for the VFS layer to provide an atomic open.
1778 * Until then, this create/open method is prone to inefficiency and race
1779 * conditions due to the lookup, create, and open VFS calls from sys_open()
1780 * placed on the wire.
1782 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1783 * The file will be opened again in the subsequent VFS open call
1784 * (nfs4_proc_file_open).
1786 * The open for read will just hang around to be used by any process that
1787 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1791 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1792 int flags, struct nameidata *nd)
1794 struct nfs4_state *state;
1795 struct rpc_cred *cred;
1798 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1800 status = PTR_ERR(cred);
1803 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1805 if (IS_ERR(state)) {
1806 status = PTR_ERR(state);
1809 d_instantiate(dentry, igrab(state->inode));
1810 if (flags & O_EXCL) {
1811 struct nfs_fattr fattr;
1812 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1814 nfs_setattr_update_inode(state->inode, sattr);
1816 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1817 status = nfs4_intent_set_file(nd, dentry, state);
1819 nfs4_close_state(state, flags);
1824 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1826 struct nfs_server *server = NFS_SERVER(dir);
1827 struct nfs4_remove_arg args = {
1830 .bitmask = server->attr_bitmask,
1832 struct nfs_fattr dir_attr;
1833 struct nfs4_remove_res res = {
1835 .dir_attr = &dir_attr,
1837 struct rpc_message msg = {
1838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1844 nfs_fattr_init(res.dir_attr);
1845 status = rpc_call_sync(server->client, &msg, 0);
1847 update_changeattr(dir, &res.cinfo);
1848 nfs_post_op_update_inode(dir, res.dir_attr);
1853 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1855 struct nfs4_exception exception = { };
1858 err = nfs4_handle_exception(NFS_SERVER(dir),
1859 _nfs4_proc_remove(dir, name),
1861 } while (exception.retry);
1865 struct unlink_desc {
1866 struct nfs4_remove_arg args;
1867 struct nfs4_remove_res res;
1868 struct nfs_fattr dir_attr;
1871 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1874 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1875 struct unlink_desc *up;
1877 up = kmalloc(sizeof(*up), GFP_KERNEL);
1881 up->args.fh = NFS_FH(dir->d_inode);
1882 up->args.name = name;
1883 up->args.bitmask = server->attr_bitmask;
1884 up->res.server = server;
1885 up->res.dir_attr = &up->dir_attr;
1887 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1888 msg->rpc_argp = &up->args;
1889 msg->rpc_resp = &up->res;
1893 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1895 struct rpc_message *msg = &task->tk_msg;
1896 struct unlink_desc *up;
1898 if (msg->rpc_resp != NULL) {
1899 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1900 update_changeattr(dir->d_inode, &up->res.cinfo);
1901 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1903 msg->rpc_resp = NULL;
1904 msg->rpc_argp = NULL;
1909 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1910 struct inode *new_dir, struct qstr *new_name)
1912 struct nfs_server *server = NFS_SERVER(old_dir);
1913 struct nfs4_rename_arg arg = {
1914 .old_dir = NFS_FH(old_dir),
1915 .new_dir = NFS_FH(new_dir),
1916 .old_name = old_name,
1917 .new_name = new_name,
1918 .bitmask = server->attr_bitmask,
1920 struct nfs_fattr old_fattr, new_fattr;
1921 struct nfs4_rename_res res = {
1923 .old_fattr = &old_fattr,
1924 .new_fattr = &new_fattr,
1926 struct rpc_message msg = {
1927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1933 nfs_fattr_init(res.old_fattr);
1934 nfs_fattr_init(res.new_fattr);
1935 status = rpc_call_sync(server->client, &msg, 0);
1938 update_changeattr(old_dir, &res.old_cinfo);
1939 nfs_post_op_update_inode(old_dir, res.old_fattr);
1940 update_changeattr(new_dir, &res.new_cinfo);
1941 nfs_post_op_update_inode(new_dir, res.new_fattr);
1946 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1947 struct inode *new_dir, struct qstr *new_name)
1949 struct nfs4_exception exception = { };
1952 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1953 _nfs4_proc_rename(old_dir, old_name,
1956 } while (exception.retry);
1960 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1962 struct nfs_server *server = NFS_SERVER(inode);
1963 struct nfs4_link_arg arg = {
1964 .fh = NFS_FH(inode),
1965 .dir_fh = NFS_FH(dir),
1967 .bitmask = server->attr_bitmask,
1969 struct nfs_fattr fattr, dir_attr;
1970 struct nfs4_link_res res = {
1973 .dir_attr = &dir_attr,
1975 struct rpc_message msg = {
1976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1982 nfs_fattr_init(res.fattr);
1983 nfs_fattr_init(res.dir_attr);
1984 status = rpc_call_sync(server->client, &msg, 0);
1986 update_changeattr(dir, &res.cinfo);
1987 nfs_post_op_update_inode(dir, res.dir_attr);
1988 nfs_post_op_update_inode(inode, res.fattr);
1994 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1996 struct nfs4_exception exception = { };
1999 err = nfs4_handle_exception(NFS_SERVER(inode),
2000 _nfs4_proc_link(inode, dir, name),
2002 } while (exception.retry);
2006 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2007 struct page *page, unsigned int len, struct iattr *sattr)
2009 struct nfs_server *server = NFS_SERVER(dir);
2010 struct nfs_fh fhandle;
2011 struct nfs_fattr fattr, dir_fattr;
2012 struct nfs4_create_arg arg = {
2013 .dir_fh = NFS_FH(dir),
2015 .name = &dentry->d_name,
2018 .bitmask = server->attr_bitmask,
2020 struct nfs4_create_res res = {
2024 .dir_fattr = &dir_fattr,
2026 struct rpc_message msg = {
2027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2033 if (len > NFS4_MAXPATHLEN)
2034 return -ENAMETOOLONG;
2036 arg.u.symlink.pages = &page;
2037 arg.u.symlink.len = len;
2038 nfs_fattr_init(&fattr);
2039 nfs_fattr_init(&dir_fattr);
2041 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2043 update_changeattr(dir, &res.dir_cinfo);
2044 nfs_post_op_update_inode(dir, res.dir_fattr);
2045 status = nfs_instantiate(dentry, &fhandle, &fattr);
2050 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2051 struct page *page, unsigned int len, struct iattr *sattr)
2053 struct nfs4_exception exception = { };
2056 err = nfs4_handle_exception(NFS_SERVER(dir),
2057 _nfs4_proc_symlink(dir, dentry, page,
2060 } while (exception.retry);
2064 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2065 struct iattr *sattr)
2067 struct nfs_server *server = NFS_SERVER(dir);
2068 struct nfs_fh fhandle;
2069 struct nfs_fattr fattr, dir_fattr;
2070 struct nfs4_create_arg arg = {
2071 .dir_fh = NFS_FH(dir),
2073 .name = &dentry->d_name,
2076 .bitmask = server->attr_bitmask,
2078 struct nfs4_create_res res = {
2082 .dir_fattr = &dir_fattr,
2084 struct rpc_message msg = {
2085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2091 nfs_fattr_init(&fattr);
2092 nfs_fattr_init(&dir_fattr);
2094 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2096 update_changeattr(dir, &res.dir_cinfo);
2097 nfs_post_op_update_inode(dir, res.dir_fattr);
2098 status = nfs_instantiate(dentry, &fhandle, &fattr);
2103 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2104 struct iattr *sattr)
2106 struct nfs4_exception exception = { };
2109 err = nfs4_handle_exception(NFS_SERVER(dir),
2110 _nfs4_proc_mkdir(dir, dentry, sattr),
2112 } while (exception.retry);
2116 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2117 u64 cookie, struct page *page, unsigned int count, int plus)
2119 struct inode *dir = dentry->d_inode;
2120 struct nfs4_readdir_arg args = {
2125 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2127 struct nfs4_readdir_res res;
2128 struct rpc_message msg = {
2129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2136 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2137 dentry->d_parent->d_name.name,
2138 dentry->d_name.name,
2139 (unsigned long long)cookie);
2140 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2141 res.pgbase = args.pgbase;
2142 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2144 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2145 dprintk("%s: returns %d\n", __FUNCTION__, status);
2149 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2150 u64 cookie, struct page *page, unsigned int count, int plus)
2152 struct nfs4_exception exception = { };
2155 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2156 _nfs4_proc_readdir(dentry, cred, cookie,
2159 } while (exception.retry);
2163 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2164 struct iattr *sattr, dev_t rdev)
2166 struct nfs_server *server = NFS_SERVER(dir);
2168 struct nfs_fattr fattr, dir_fattr;
2169 struct nfs4_create_arg arg = {
2170 .dir_fh = NFS_FH(dir),
2172 .name = &dentry->d_name,
2174 .bitmask = server->attr_bitmask,
2176 struct nfs4_create_res res = {
2180 .dir_fattr = &dir_fattr,
2182 struct rpc_message msg = {
2183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2188 int mode = sattr->ia_mode;
2190 nfs_fattr_init(&fattr);
2191 nfs_fattr_init(&dir_fattr);
2193 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2194 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2196 arg.ftype = NF4FIFO;
2197 else if (S_ISBLK(mode)) {
2199 arg.u.device.specdata1 = MAJOR(rdev);
2200 arg.u.device.specdata2 = MINOR(rdev);
2202 else if (S_ISCHR(mode)) {
2204 arg.u.device.specdata1 = MAJOR(rdev);
2205 arg.u.device.specdata2 = MINOR(rdev);
2208 arg.ftype = NF4SOCK;
2210 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2212 update_changeattr(dir, &res.dir_cinfo);
2213 nfs_post_op_update_inode(dir, res.dir_fattr);
2214 status = nfs_instantiate(dentry, &fh, &fattr);
2219 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2220 struct iattr *sattr, dev_t rdev)
2222 struct nfs4_exception exception = { };
2225 err = nfs4_handle_exception(NFS_SERVER(dir),
2226 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2228 } while (exception.retry);
2232 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2233 struct nfs_fsstat *fsstat)
2235 struct nfs4_statfs_arg args = {
2237 .bitmask = server->attr_bitmask,
2239 struct rpc_message msg = {
2240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2245 nfs_fattr_init(fsstat->fattr);
2246 return rpc_call_sync(server->client, &msg, 0);
2249 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2251 struct nfs4_exception exception = { };
2254 err = nfs4_handle_exception(server,
2255 _nfs4_proc_statfs(server, fhandle, fsstat),
2257 } while (exception.retry);
2261 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2262 struct nfs_fsinfo *fsinfo)
2264 struct nfs4_fsinfo_arg args = {
2266 .bitmask = server->attr_bitmask,
2268 struct rpc_message msg = {
2269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2274 return rpc_call_sync(server->client, &msg, 0);
2277 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2279 struct nfs4_exception exception = { };
2283 err = nfs4_handle_exception(server,
2284 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2286 } while (exception.retry);
2290 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2292 nfs_fattr_init(fsinfo->fattr);
2293 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2296 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2297 struct nfs_pathconf *pathconf)
2299 struct nfs4_pathconf_arg args = {
2301 .bitmask = server->attr_bitmask,
2303 struct rpc_message msg = {
2304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2306 .rpc_resp = pathconf,
2309 /* None of the pathconf attributes are mandatory to implement */
2310 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2311 memset(pathconf, 0, sizeof(*pathconf));
2315 nfs_fattr_init(pathconf->fattr);
2316 return rpc_call_sync(server->client, &msg, 0);
2319 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2320 struct nfs_pathconf *pathconf)
2322 struct nfs4_exception exception = { };
2326 err = nfs4_handle_exception(server,
2327 _nfs4_proc_pathconf(server, fhandle, pathconf),
2329 } while (exception.retry);
2333 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2335 struct nfs_server *server = NFS_SERVER(data->inode);
2337 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2338 rpc_restart_call(task);
2341 if (task->tk_status > 0)
2342 renew_lease(server, data->timestamp);
2346 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2348 struct rpc_message msg = {
2349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2350 .rpc_argp = &data->args,
2351 .rpc_resp = &data->res,
2352 .rpc_cred = data->cred,
2355 data->timestamp = jiffies;
2357 rpc_call_setup(&data->task, &msg, 0);
2360 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2362 struct inode *inode = data->inode;
2364 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2365 rpc_restart_call(task);
2368 if (task->tk_status >= 0) {
2369 renew_lease(NFS_SERVER(inode), data->timestamp);
2370 nfs_post_op_update_inode(inode, data->res.fattr);
2375 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2377 struct rpc_message msg = {
2378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2379 .rpc_argp = &data->args,
2380 .rpc_resp = &data->res,
2381 .rpc_cred = data->cred,
2383 struct inode *inode = data->inode;
2384 struct nfs_server *server = NFS_SERVER(inode);
2387 if (how & FLUSH_STABLE) {
2388 if (!NFS_I(inode)->ncommit)
2389 stable = NFS_FILE_SYNC;
2391 stable = NFS_DATA_SYNC;
2393 stable = NFS_UNSTABLE;
2394 data->args.stable = stable;
2395 data->args.bitmask = server->attr_bitmask;
2396 data->res.server = server;
2398 data->timestamp = jiffies;
2400 /* Finalize the task. */
2401 rpc_call_setup(&data->task, &msg, 0);
2404 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2406 struct inode *inode = data->inode;
2408 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2409 rpc_restart_call(task);
2412 if (task->tk_status >= 0)
2413 nfs_post_op_update_inode(inode, data->res.fattr);
2417 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2419 struct rpc_message msg = {
2420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2421 .rpc_argp = &data->args,
2422 .rpc_resp = &data->res,
2423 .rpc_cred = data->cred,
2425 struct nfs_server *server = NFS_SERVER(data->inode);
2427 data->args.bitmask = server->attr_bitmask;
2428 data->res.server = server;
2430 rpc_call_setup(&data->task, &msg, 0);
2434 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2435 * standalone procedure for queueing an asynchronous RENEW.
2437 static void nfs4_renew_done(struct rpc_task *task, void *data)
2439 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2440 unsigned long timestamp = (unsigned long)data;
2442 if (task->tk_status < 0) {
2443 switch (task->tk_status) {
2444 case -NFS4ERR_STALE_CLIENTID:
2445 case -NFS4ERR_EXPIRED:
2446 case -NFS4ERR_CB_PATH_DOWN:
2447 nfs4_schedule_state_recovery(clp);
2451 spin_lock(&clp->cl_lock);
2452 if (time_before(clp->cl_last_renewal,timestamp))
2453 clp->cl_last_renewal = timestamp;
2454 spin_unlock(&clp->cl_lock);
2457 static const struct rpc_call_ops nfs4_renew_ops = {
2458 .rpc_call_done = nfs4_renew_done,
2461 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2463 struct rpc_message msg = {
2464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2469 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2470 &nfs4_renew_ops, (void *)jiffies);
2473 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2475 struct rpc_message msg = {
2476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2480 unsigned long now = jiffies;
2483 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2486 spin_lock(&clp->cl_lock);
2487 if (time_before(clp->cl_last_renewal,now))
2488 clp->cl_last_renewal = now;
2489 spin_unlock(&clp->cl_lock);
2493 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2495 return (server->caps & NFS_CAP_ACLS)
2496 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2497 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2500 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2501 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2504 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2506 static void buf_to_pages(const void *buf, size_t buflen,
2507 struct page **pages, unsigned int *pgbase)
2509 const void *p = buf;
2511 *pgbase = offset_in_page(buf);
2513 while (p < buf + buflen) {
2514 *(pages++) = virt_to_page(p);
2515 p += PAGE_CACHE_SIZE;
2519 struct nfs4_cached_acl {
2525 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2527 struct nfs_inode *nfsi = NFS_I(inode);
2529 spin_lock(&inode->i_lock);
2530 kfree(nfsi->nfs4_acl);
2531 nfsi->nfs4_acl = acl;
2532 spin_unlock(&inode->i_lock);
2535 static void nfs4_zap_acl_attr(struct inode *inode)
2537 nfs4_set_cached_acl(inode, NULL);
2540 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2542 struct nfs_inode *nfsi = NFS_I(inode);
2543 struct nfs4_cached_acl *acl;
2546 spin_lock(&inode->i_lock);
2547 acl = nfsi->nfs4_acl;
2550 if (buf == NULL) /* user is just asking for length */
2552 if (acl->cached == 0)
2554 ret = -ERANGE; /* see getxattr(2) man page */
2555 if (acl->len > buflen)
2557 memcpy(buf, acl->data, acl->len);
2561 spin_unlock(&inode->i_lock);
2565 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2567 struct nfs4_cached_acl *acl;
2569 if (buf && acl_len <= PAGE_SIZE) {
2570 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2574 memcpy(acl->data, buf, acl_len);
2576 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2583 nfs4_set_cached_acl(inode, acl);
2586 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2588 struct page *pages[NFS4ACL_MAXPAGES];
2589 struct nfs_getaclargs args = {
2590 .fh = NFS_FH(inode),
2594 size_t resp_len = buflen;
2596 struct rpc_message msg = {
2597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2599 .rpc_resp = &resp_len,
2601 struct page *localpage = NULL;
2604 if (buflen < PAGE_SIZE) {
2605 /* As long as we're doing a round trip to the server anyway,
2606 * let's be prepared for a page of acl data. */
2607 localpage = alloc_page(GFP_KERNEL);
2608 resp_buf = page_address(localpage);
2609 if (localpage == NULL)
2611 args.acl_pages[0] = localpage;
2612 args.acl_pgbase = 0;
2613 resp_len = args.acl_len = PAGE_SIZE;
2616 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2618 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2621 if (resp_len > args.acl_len)
2622 nfs4_write_cached_acl(inode, NULL, resp_len);
2624 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2627 if (resp_len > buflen)
2630 memcpy(buf, resp_buf, resp_len);
2635 __free_page(localpage);
2639 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2641 struct nfs4_exception exception = { };
2644 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2647 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2648 } while (exception.retry);
2652 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2654 struct nfs_server *server = NFS_SERVER(inode);
2657 if (!nfs4_server_supports_acls(server))
2659 ret = nfs_revalidate_inode(server, inode);
2662 ret = nfs4_read_cached_acl(inode, buf, buflen);
2665 return nfs4_get_acl_uncached(inode, buf, buflen);
2668 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2670 struct nfs_server *server = NFS_SERVER(inode);
2671 struct page *pages[NFS4ACL_MAXPAGES];
2672 struct nfs_setaclargs arg = {
2673 .fh = NFS_FH(inode),
2677 struct rpc_message msg = {
2678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2684 if (!nfs4_server_supports_acls(server))
2686 nfs_inode_return_delegation(inode);
2687 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2688 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2690 nfs4_write_cached_acl(inode, buf, buflen);
2694 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2696 struct nfs4_exception exception = { };
2699 err = nfs4_handle_exception(NFS_SERVER(inode),
2700 __nfs4_proc_set_acl(inode, buf, buflen),
2702 } while (exception.retry);
2707 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2709 struct nfs_client *clp = server->nfs_client;
2711 if (!clp || task->tk_status >= 0)
2713 switch(task->tk_status) {
2714 case -NFS4ERR_STALE_CLIENTID:
2715 case -NFS4ERR_STALE_STATEID:
2716 case -NFS4ERR_EXPIRED:
2717 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2718 nfs4_schedule_state_recovery(clp);
2719 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2720 rpc_wake_up_task(task);
2721 task->tk_status = 0;
2723 case -NFS4ERR_DELAY:
2724 nfs_inc_server_stats((struct nfs_server *) server,
2726 case -NFS4ERR_GRACE:
2727 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2728 task->tk_status = 0;
2730 case -NFS4ERR_OLD_STATEID:
2731 task->tk_status = 0;
2734 task->tk_status = nfs4_map_errors(task->tk_status);
2738 static int nfs4_wait_bit_interruptible(void *word)
2740 if (signal_pending(current))
2741 return -ERESTARTSYS;
2746 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2753 rpc_clnt_sigmask(clnt, &oldset);
2754 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2755 nfs4_wait_bit_interruptible,
2756 TASK_INTERRUPTIBLE);
2757 rpc_clnt_sigunmask(clnt, &oldset);
2761 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2769 *timeout = NFS4_POLL_RETRY_MIN;
2770 if (*timeout > NFS4_POLL_RETRY_MAX)
2771 *timeout = NFS4_POLL_RETRY_MAX;
2772 rpc_clnt_sigmask(clnt, &oldset);
2773 if (clnt->cl_intr) {
2774 schedule_timeout_interruptible(*timeout);
2778 schedule_timeout_uninterruptible(*timeout);
2779 rpc_clnt_sigunmask(clnt, &oldset);
2784 /* This is the error handling routine for processes that are allowed
2787 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2789 struct nfs_client *clp = server->nfs_client;
2790 int ret = errorcode;
2792 exception->retry = 0;
2796 case -NFS4ERR_STALE_CLIENTID:
2797 case -NFS4ERR_STALE_STATEID:
2798 case -NFS4ERR_EXPIRED:
2799 nfs4_schedule_state_recovery(clp);
2800 ret = nfs4_wait_clnt_recover(server->client, clp);
2802 exception->retry = 1;
2804 case -NFS4ERR_FILE_OPEN:
2805 case -NFS4ERR_GRACE:
2806 case -NFS4ERR_DELAY:
2807 ret = nfs4_delay(server->client, &exception->timeout);
2810 case -NFS4ERR_OLD_STATEID:
2811 exception->retry = 1;
2813 /* We failed to handle the error */
2814 return nfs4_map_errors(ret);
2817 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2819 nfs4_verifier sc_verifier;
2820 struct nfs4_setclientid setclientid = {
2821 .sc_verifier = &sc_verifier,
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2826 .rpc_argp = &setclientid,
2834 p = (__be32*)sc_verifier.data;
2835 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2836 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2839 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2840 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2841 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2842 cred->cr_ops->cr_name,
2843 clp->cl_id_uniquifier);
2844 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2845 sizeof(setclientid.sc_netid), "tcp");
2846 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2847 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2848 clp->cl_ipaddr, port >> 8, port & 255);
2850 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2851 if (status != -NFS4ERR_CLID_INUSE)
2856 ssleep(clp->cl_lease_time + 1);
2858 if (++clp->cl_id_uniquifier == 0)
2864 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2866 struct nfs_fsinfo fsinfo;
2867 struct rpc_message msg = {
2868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2870 .rpc_resp = &fsinfo,
2877 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2879 spin_lock(&clp->cl_lock);
2880 clp->cl_lease_time = fsinfo.lease_time * HZ;
2881 clp->cl_last_renewal = now;
2882 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2883 spin_unlock(&clp->cl_lock);
2888 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2893 err = _nfs4_proc_setclientid_confirm(clp, cred);
2897 case -NFS4ERR_RESOURCE:
2898 /* The IBM lawyers misread another document! */
2899 case -NFS4ERR_DELAY:
2900 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2906 struct nfs4_delegreturndata {
2907 struct nfs4_delegreturnargs args;
2908 struct nfs4_delegreturnres res;
2910 nfs4_stateid stateid;
2911 struct rpc_cred *cred;
2912 unsigned long timestamp;
2913 struct nfs_fattr fattr;
2917 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2919 struct nfs4_delegreturndata *data = calldata;
2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2922 .rpc_argp = &data->args,
2923 .rpc_resp = &data->res,
2924 .rpc_cred = data->cred,
2926 nfs_fattr_init(data->res.fattr);
2927 rpc_call_setup(task, &msg, 0);
2930 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2932 struct nfs4_delegreturndata *data = calldata;
2933 data->rpc_status = task->tk_status;
2934 if (data->rpc_status == 0)
2935 renew_lease(data->res.server, data->timestamp);
2938 static void nfs4_delegreturn_release(void *calldata)
2940 struct nfs4_delegreturndata *data = calldata;
2942 put_rpccred(data->cred);
2946 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2947 .rpc_call_prepare = nfs4_delegreturn_prepare,
2948 .rpc_call_done = nfs4_delegreturn_done,
2949 .rpc_release = nfs4_delegreturn_release,
2952 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2954 struct nfs4_delegreturndata *data;
2955 struct nfs_server *server = NFS_SERVER(inode);
2956 struct rpc_task *task;
2959 data = kmalloc(sizeof(*data), GFP_KERNEL);
2962 data->args.fhandle = &data->fh;
2963 data->args.stateid = &data->stateid;
2964 data->args.bitmask = server->attr_bitmask;
2965 nfs_copy_fh(&data->fh, NFS_FH(inode));
2966 memcpy(&data->stateid, stateid, sizeof(data->stateid));
2967 data->res.fattr = &data->fattr;
2968 data->res.server = server;
2969 data->cred = get_rpccred(cred);
2970 data->timestamp = jiffies;
2971 data->rpc_status = 0;
2973 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2975 return PTR_ERR(task);
2976 status = nfs4_wait_for_completion_rpc_task(task);
2978 status = data->rpc_status;
2980 nfs_post_op_update_inode(inode, &data->fattr);
2986 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2988 struct nfs_server *server = NFS_SERVER(inode);
2989 struct nfs4_exception exception = { };
2992 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2994 case -NFS4ERR_STALE_STATEID:
2995 case -NFS4ERR_EXPIRED:
2996 nfs4_schedule_state_recovery(server->nfs_client);
3000 err = nfs4_handle_exception(server, err, &exception);
3001 } while (exception.retry);
3005 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3006 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3009 * sleep, with exponential backoff, and retry the LOCK operation.
3011 static unsigned long
3012 nfs4_set_lock_task_retry(unsigned long timeout)
3014 schedule_timeout_interruptible(timeout);
3016 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3017 return NFS4_LOCK_MAXTIMEOUT;
3021 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3023 struct inode *inode = state->inode;
3024 struct nfs_server *server = NFS_SERVER(inode);
3025 struct nfs_client *clp = server->nfs_client;
3026 struct nfs_lockt_args arg = {
3027 .fh = NFS_FH(inode),
3030 struct nfs_lockt_res res = {
3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3037 .rpc_cred = state->owner->so_cred,
3039 struct nfs4_lock_state *lsp;
3042 down_read(&clp->cl_sem);
3043 arg.lock_owner.clientid = clp->cl_clientid;
3044 status = nfs4_set_lock_state(state, request);
3047 lsp = request->fl_u.nfs4_fl.owner;
3048 arg.lock_owner.id = lsp->ls_id;
3049 status = rpc_call_sync(server->client, &msg, 0);
3052 request->fl_type = F_UNLCK;
3054 case -NFS4ERR_DENIED:
3058 up_read(&clp->cl_sem);
3062 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3064 struct nfs4_exception exception = { };
3068 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3069 _nfs4_proc_getlk(state, cmd, request),
3071 } while (exception.retry);
3075 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3078 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3080 res = posix_lock_file_wait(file, fl);
3083 res = flock_lock_file_wait(file, fl);
3091 struct nfs4_unlockdata {
3092 struct nfs_locku_args arg;
3093 struct nfs_locku_res res;
3094 struct nfs4_lock_state *lsp;
3095 struct nfs_open_context *ctx;
3096 struct file_lock fl;
3097 const struct nfs_server *server;
3098 unsigned long timestamp;
3101 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3102 struct nfs_open_context *ctx,
3103 struct nfs4_lock_state *lsp,
3104 struct nfs_seqid *seqid)
3106 struct nfs4_unlockdata *p;
3107 struct inode *inode = lsp->ls_state->inode;
3109 p = kmalloc(sizeof(*p), GFP_KERNEL);
3112 p->arg.fh = NFS_FH(inode);
3114 p->arg.seqid = seqid;
3115 p->arg.stateid = &lsp->ls_stateid;
3117 atomic_inc(&lsp->ls_count);
3118 /* Ensure we don't close file until we're done freeing locks! */
3119 p->ctx = get_nfs_open_context(ctx);
3120 memcpy(&p->fl, fl, sizeof(p->fl));
3121 p->server = NFS_SERVER(inode);
3125 static void nfs4_locku_release_calldata(void *data)
3127 struct nfs4_unlockdata *calldata = data;
3128 nfs_free_seqid(calldata->arg.seqid);
3129 nfs4_put_lock_state(calldata->lsp);
3130 put_nfs_open_context(calldata->ctx);
3134 static void nfs4_locku_done(struct rpc_task *task, void *data)
3136 struct nfs4_unlockdata *calldata = data;
3138 if (RPC_ASSASSINATED(task))
3140 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3141 switch (task->tk_status) {
3143 memcpy(calldata->lsp->ls_stateid.data,
3144 calldata->res.stateid.data,
3145 sizeof(calldata->lsp->ls_stateid.data));
3146 renew_lease(calldata->server, calldata->timestamp);
3148 case -NFS4ERR_STALE_STATEID:
3149 case -NFS4ERR_EXPIRED:
3150 nfs4_schedule_state_recovery(calldata->server->nfs_client);
3153 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
3154 rpc_restart_call(task);
3159 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3161 struct nfs4_unlockdata *calldata = data;
3162 struct rpc_message msg = {
3163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3164 .rpc_argp = &calldata->arg,
3165 .rpc_resp = &calldata->res,
3166 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3169 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3171 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3172 /* Note: exit _without_ running nfs4_locku_done */
3173 task->tk_action = NULL;
3176 calldata->timestamp = jiffies;
3177 rpc_call_setup(task, &msg, 0);
3180 static const struct rpc_call_ops nfs4_locku_ops = {
3181 .rpc_call_prepare = nfs4_locku_prepare,
3182 .rpc_call_done = nfs4_locku_done,
3183 .rpc_release = nfs4_locku_release_calldata,
3186 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3187 struct nfs_open_context *ctx,
3188 struct nfs4_lock_state *lsp,
3189 struct nfs_seqid *seqid)
3191 struct nfs4_unlockdata *data;
3193 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3195 nfs_free_seqid(seqid);
3196 return ERR_PTR(-ENOMEM);
3199 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3202 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3204 struct nfs_seqid *seqid;
3205 struct nfs4_lock_state *lsp;
3206 struct rpc_task *task;
3209 status = nfs4_set_lock_state(state, request);
3210 /* Unlock _before_ we do the RPC call */
3211 request->fl_flags |= FL_EXISTS;
3212 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3216 /* Is this a delegated lock? */
3217 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3219 lsp = request->fl_u.nfs4_fl.owner;
3220 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3224 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3225 status = PTR_ERR(task);
3228 status = nfs4_wait_for_completion_rpc_task(task);
3234 struct nfs4_lockdata {
3235 struct nfs_lock_args arg;
3236 struct nfs_lock_res res;
3237 struct nfs4_lock_state *lsp;
3238 struct nfs_open_context *ctx;
3239 struct file_lock fl;
3240 unsigned long timestamp;
3245 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3246 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3248 struct nfs4_lockdata *p;
3249 struct inode *inode = lsp->ls_state->inode;
3250 struct nfs_server *server = NFS_SERVER(inode);
3252 p = kzalloc(sizeof(*p), GFP_KERNEL);
3256 p->arg.fh = NFS_FH(inode);
3258 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3259 if (p->arg.lock_seqid == NULL)
3261 p->arg.lock_stateid = &lsp->ls_stateid;
3262 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3263 p->arg.lock_owner.id = lsp->ls_id;
3265 atomic_inc(&lsp->ls_count);
3266 p->ctx = get_nfs_open_context(ctx);
3267 memcpy(&p->fl, fl, sizeof(p->fl));
3274 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3276 struct nfs4_lockdata *data = calldata;
3277 struct nfs4_state *state = data->lsp->ls_state;
3278 struct nfs4_state_owner *sp = state->owner;
3279 struct rpc_message msg = {
3280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3281 .rpc_argp = &data->arg,
3282 .rpc_resp = &data->res,
3283 .rpc_cred = sp->so_cred,
3286 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3288 dprintk("%s: begin!\n", __FUNCTION__);
3289 /* Do we need to do an open_to_lock_owner? */
3290 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3291 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3292 if (data->arg.open_seqid == NULL) {
3293 data->rpc_status = -ENOMEM;
3294 task->tk_action = NULL;
3297 data->arg.open_stateid = &state->stateid;
3298 data->arg.new_lock_owner = 1;
3300 data->timestamp = jiffies;
3301 rpc_call_setup(task, &msg, 0);
3303 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3306 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3308 struct nfs4_lockdata *data = calldata;
3310 dprintk("%s: begin!\n", __FUNCTION__);
3312 data->rpc_status = task->tk_status;
3313 if (RPC_ASSASSINATED(task))
3315 if (data->arg.new_lock_owner != 0) {
3316 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3317 if (data->rpc_status == 0)
3318 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3322 if (data->rpc_status == 0) {
3323 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3324 sizeof(data->lsp->ls_stateid.data));
3325 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3326 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
3328 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3330 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3333 static void nfs4_lock_release(void *calldata)
3335 struct nfs4_lockdata *data = calldata;
3337 dprintk("%s: begin!\n", __FUNCTION__);
3338 if (data->arg.open_seqid != NULL)
3339 nfs_free_seqid(data->arg.open_seqid);
3340 if (data->cancelled != 0) {
3341 struct rpc_task *task;
3342 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3343 data->arg.lock_seqid);
3346 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3348 nfs_free_seqid(data->arg.lock_seqid);
3349 nfs4_put_lock_state(data->lsp);
3350 put_nfs_open_context(data->ctx);
3352 dprintk("%s: done!\n", __FUNCTION__);
3355 static const struct rpc_call_ops nfs4_lock_ops = {
3356 .rpc_call_prepare = nfs4_lock_prepare,
3357 .rpc_call_done = nfs4_lock_done,
3358 .rpc_release = nfs4_lock_release,
3361 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3363 struct nfs4_lockdata *data;
3364 struct rpc_task *task;
3367 dprintk("%s: begin!\n", __FUNCTION__);
3368 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3369 fl->fl_u.nfs4_fl.owner);
3373 data->arg.block = 1;
3375 data->arg.reclaim = 1;
3376 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3377 &nfs4_lock_ops, data);
3379 return PTR_ERR(task);
3380 ret = nfs4_wait_for_completion_rpc_task(task);
3382 ret = data->rpc_status;
3383 if (ret == -NFS4ERR_DENIED)
3386 data->cancelled = 1;
3388 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3392 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3394 struct nfs_server *server = NFS_SERVER(state->inode);
3395 struct nfs4_exception exception = { };
3399 /* Cache the lock if possible... */
3400 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3402 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3403 if (err != -NFS4ERR_DELAY)
3405 nfs4_handle_exception(server, err, &exception);
3406 } while (exception.retry);
3410 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3412 struct nfs_server *server = NFS_SERVER(state->inode);
3413 struct nfs4_exception exception = { };
3416 err = nfs4_set_lock_state(state, request);
3420 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3422 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3423 if (err != -NFS4ERR_DELAY)
3425 nfs4_handle_exception(server, err, &exception);
3426 } while (exception.retry);
3430 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3432 struct nfs_client *clp = state->owner->so_client;
3433 unsigned char fl_flags = request->fl_flags;
3436 /* Is this a delegated open? */
3437 status = nfs4_set_lock_state(state, request);
3440 request->fl_flags |= FL_ACCESS;
3441 status = do_vfs_lock(request->fl_file, request);
3444 down_read(&clp->cl_sem);
3445 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3446 struct nfs_inode *nfsi = NFS_I(state->inode);
3447 /* Yes: cache locks! */
3448 down_read(&nfsi->rwsem);
3449 /* ...but avoid races with delegation recall... */
3450 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3451 request->fl_flags = fl_flags & ~FL_SLEEP;
3452 status = do_vfs_lock(request->fl_file, request);
3453 up_read(&nfsi->rwsem);
3456 up_read(&nfsi->rwsem);
3458 status = _nfs4_do_setlk(state, cmd, request, 0);
3461 /* Note: we always want to sleep here! */
3462 request->fl_flags = fl_flags | FL_SLEEP;
3463 if (do_vfs_lock(request->fl_file, request) < 0)
3464 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3466 up_read(&clp->cl_sem);
3468 request->fl_flags = fl_flags;
3472 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3474 struct nfs4_exception exception = { };
3478 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3479 _nfs4_proc_setlk(state, cmd, request),
3481 } while (exception.retry);
3486 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3488 struct nfs_open_context *ctx;
3489 struct nfs4_state *state;
3490 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3493 /* verify open state */
3494 ctx = (struct nfs_open_context *)filp->private_data;
3497 if (request->fl_start < 0 || request->fl_end < 0)
3501 return nfs4_proc_getlk(state, F_GETLK, request);
3503 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3506 if (request->fl_type == F_UNLCK)
3507 return nfs4_proc_unlck(state, cmd, request);
3510 status = nfs4_proc_setlk(state, cmd, request);
3511 if ((status != -EAGAIN) || IS_SETLK(cmd))
3513 timeout = nfs4_set_lock_task_retry(timeout);
3514 status = -ERESTARTSYS;
3517 } while(status < 0);
3521 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3523 struct nfs_server *server = NFS_SERVER(state->inode);
3524 struct nfs4_exception exception = { };
3527 err = nfs4_set_lock_state(state, fl);
3531 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3532 if (err != -NFS4ERR_DELAY)
3534 err = nfs4_handle_exception(server, err, &exception);
3535 } while (exception.retry);
3540 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3542 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3543 size_t buflen, int flags)
3545 struct inode *inode = dentry->d_inode;
3547 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3550 if (!S_ISREG(inode->i_mode) &&
3551 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3554 return nfs4_proc_set_acl(inode, buf, buflen);
3557 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3558 * and that's what we'll do for e.g. user attributes that haven't been set.
3559 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3560 * attributes in kernel-managed attribute namespaces. */
3561 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3564 struct inode *inode = dentry->d_inode;
3566 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3569 return nfs4_proc_get_acl(inode, buf, buflen);
3572 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3574 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3576 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3578 if (buf && buflen < len)
3581 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3585 int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
3586 struct nfs4_fs_locations *fs_locations, struct page *page)
3588 struct nfs_server *server = NFS_SERVER(dir);
3590 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3591 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3593 struct nfs4_fs_locations_arg args = {
3594 .dir_fh = NFS_FH(dir),
3599 struct rpc_message msg = {
3600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3602 .rpc_resp = fs_locations,
3606 dprintk("%s: start\n", __FUNCTION__);
3607 nfs_fattr_init(&fs_locations->fattr);
3608 fs_locations->server = server;
3609 fs_locations->nlocations = 0;
3610 status = rpc_call_sync(server->client, &msg, 0);
3611 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3615 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3616 .recover_open = nfs4_open_reclaim,
3617 .recover_lock = nfs4_lock_reclaim,
3620 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3621 .recover_open = nfs4_open_expired,
3622 .recover_lock = nfs4_lock_expired,
3625 static struct inode_operations nfs4_file_inode_operations = {
3626 .permission = nfs_permission,
3627 .getattr = nfs_getattr,
3628 .setattr = nfs_setattr,
3629 .getxattr = nfs4_getxattr,
3630 .setxattr = nfs4_setxattr,
3631 .listxattr = nfs4_listxattr,
3634 const struct nfs_rpc_ops nfs_v4_clientops = {
3635 .version = 4, /* protocol version */
3636 .dentry_ops = &nfs4_dentry_operations,
3637 .dir_inode_ops = &nfs4_dir_inode_operations,
3638 .file_inode_ops = &nfs4_file_inode_operations,
3639 .getroot = nfs4_proc_get_root,
3640 .getattr = nfs4_proc_getattr,
3641 .setattr = nfs4_proc_setattr,
3642 .lookupfh = nfs4_proc_lookupfh,
3643 .lookup = nfs4_proc_lookup,
3644 .access = nfs4_proc_access,
3645 .readlink = nfs4_proc_readlink,
3646 .read = nfs4_proc_read,
3647 .create = nfs4_proc_create,
3648 .remove = nfs4_proc_remove,
3649 .unlink_setup = nfs4_proc_unlink_setup,
3650 .unlink_done = nfs4_proc_unlink_done,
3651 .rename = nfs4_proc_rename,
3652 .link = nfs4_proc_link,
3653 .symlink = nfs4_proc_symlink,
3654 .mkdir = nfs4_proc_mkdir,
3655 .rmdir = nfs4_proc_remove,
3656 .readdir = nfs4_proc_readdir,
3657 .mknod = nfs4_proc_mknod,
3658 .statfs = nfs4_proc_statfs,
3659 .fsinfo = nfs4_proc_fsinfo,
3660 .pathconf = nfs4_proc_pathconf,
3661 .set_capabilities = nfs4_server_capabilities,
3662 .decode_dirent = nfs4_decode_dirent,
3663 .read_setup = nfs4_proc_read_setup,
3664 .read_done = nfs4_read_done,
3665 .write_setup = nfs4_proc_write_setup,
3666 .write_done = nfs4_write_done,
3667 .commit_setup = nfs4_proc_commit_setup,
3668 .commit_done = nfs4_commit_done,
3669 .file_open = nfs_open,
3670 .file_release = nfs_release,
3671 .lock = nfs4_proc_lock,
3672 .clear_acl_cache = nfs4_zap_acl_attr,