blob: 8bdfe3ff79256940b68a416403c724582e5b7ad6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
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.
24 *
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.
36 */
37
38#include <linux/mm.h>
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>
Trond Myklebust02a913a2005-10-18 14:20:17 -070050#include <linux/mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Trond Myklebust4ce79712005-06-22 17:16:21 +000052#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include "delegation.h"
Chuck Lever006ea732006-03-20 13:44:14 -050054#include "iostat.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#define NFSDBG_FACILITY NFSDBG_PROC
57
58#define NFS4_POLL_RETRY_MIN (1*HZ)
59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
Trond Myklebustcdd4e682006-01-03 09:55:12 +010061struct nfs4_opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +010062static int _nfs4_proc_open(struct nfs4_opendata *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070064static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070066static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
Trond Myklebust58d97142006-01-03 09:55:24 +010067static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
74 __FUNCTION__, -err);
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const 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
107};
108
Trond Myklebust4ce79712005-06-22 17:16:21 +0000109const u32 nfs4_pathconf_bitmap[2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
Manoj Naik830b8e32006-06-09 09:34:25 -0400122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
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
139};
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
143{
144 u32 *start, *p;
145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000148 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
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
163 * instead of 1 or 2.
164 */
165 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
166
167 if (cookie == 0) {
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 */
173 p++;
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);
178 }
179
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 */
185 p++;
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);
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
Trond Myklebust26e976a2006-01-03 09:55:21 +0100196static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
198 struct nfs4_client *clp = server->nfs4_state;
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);
203}
204
Trond Myklebust38478b22006-05-25 01:40:57 -0400205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
Trond Myklebust38478b22006-05-25 01:40:57 -0400207 struct nfs_inode *nfsi = NFS_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Trond Myklebust38478b22006-05-25 01:40:57 -0400209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
Trond Myklebust38478b22006-05-25 01:40:57 -0400213 spin_unlock(&dir->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100216struct nfs4_opendata {
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100217 atomic_t count;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
224 struct dentry *dentry;
225 struct dentry *dir;
226 struct nfs4_state_owner *owner;
227 struct iattr attrs;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100228 unsigned long timestamp;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100229 int rpc_status;
230 int cancelled;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100231};
232
233static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
236{
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;
241
242 p = kzalloc(sizeof(*p), GFP_KERNEL);
243 if (p == NULL)
244 goto err;
245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
246 if (p->o_arg.seqid == NULL)
247 goto err_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100248 atomic_set(&p->count, 1);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100249 p->dentry = dget(dentry);
250 p->dir = parent;
251 p->owner = sp;
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->nfs4_state->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;
268 s[0] = jiffies;
269 s[1] = current->pid;
270 } else if (flags & O_CREAT) {
271 p->o_arg.u.attrs = &p->attrs;
272 memcpy(&p->attrs, attrs, sizeof(p->attrs));
273 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100274 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;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100277 return p;
278err_free:
279 kfree(p);
280err:
281 dput(parent);
282 return NULL;
283}
284
285static void nfs4_opendata_free(struct nfs4_opendata *p)
286{
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100287 if (p != NULL && atomic_dec_and_test(&p->count)) {
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100288 nfs_free_seqid(p->o_arg.seqid);
289 nfs4_put_state_owner(p->owner);
290 dput(p->dir);
291 dput(p->dentry);
292 kfree(p);
293 }
294}
295
Trond Myklebust95121352005-10-18 14:20:12 -0700296/* Helper for asynchronous RPC calls */
Trond Myklebust4ce70ad2006-01-03 09:55:05 +0100297static int nfs4_call_async(struct rpc_clnt *clnt,
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100298 const struct rpc_call_ops *tk_ops, void *calldata)
Trond Myklebust95121352005-10-18 14:20:12 -0700299{
300 struct rpc_task *task;
301
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
Trond Myklebust95121352005-10-18 14:20:12 -0700303 return -ENOMEM;
Trond Myklebust95121352005-10-18 14:20:12 -0700304 rpc_execute(task);
305 return 0;
306}
307
Trond Myklebust06f814a2006-01-03 09:55:07 +0100308static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
309{
310 sigset_t oldset;
311 int ret;
312
313 rpc_clnt_sigmask(task->tk_client, &oldset);
314 ret = rpc_wait_for_completion_task(task);
315 rpc_clnt_sigunmask(task->tk_client, &oldset);
316 return ret;
317}
318
Trond Myklebuste7616922006-01-03 09:55:13 +0100319static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
320{
321 switch (open_flags) {
322 case FMODE_WRITE:
323 state->n_wronly++;
324 break;
325 case FMODE_READ:
326 state->n_rdonly++;
327 break;
328 case FMODE_READ|FMODE_WRITE:
329 state->n_rdwr++;
330 }
331}
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
334{
335 struct inode *inode = state->inode;
336
337 open_flags &= (FMODE_READ|FMODE_WRITE);
Trond Myklebustd5308382005-11-04 15:33:38 -0500338 /* Protect against nfs4_find_state_byowner() */
Trond Myklebustec073422005-10-20 14:22:47 -0700339 spin_lock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 spin_lock(&inode->i_lock);
Trond Myklebust4cecb762005-11-04 15:32:58 -0500341 memcpy(&state->stateid, stateid, sizeof(state->stateid));
Trond Myklebuste7616922006-01-03 09:55:13 +0100342 update_open_stateflags(state, open_flags);
Trond Myklebust4cecb762005-11-04 15:32:58 -0500343 nfs4_state_set_mode_locked(state, state->state | open_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 spin_unlock(&inode->i_lock);
Trond Myklebustec073422005-10-20 14:22:47 -0700345 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100348static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
349{
350 struct inode *inode;
351 struct nfs4_state *state = NULL;
352
353 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
354 goto out;
355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
Trond Myklebust03f28e32006-03-20 13:44:48 -0500356 if (IS_ERR(inode))
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100357 goto out;
358 state = nfs4_get_open_state(inode, data->owner);
359 if (state == NULL)
360 goto put_inode;
361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
362put_inode:
363 iput(inode);
364out:
365 return state;
366}
367
Trond Myklebust864472e2006-01-03 09:55:15 +0100368static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
369{
370 struct nfs_inode *nfsi = NFS_I(state->inode);
371 struct nfs_open_context *ctx;
372
373 spin_lock(&state->inode->i_lock);
374 list_for_each_entry(ctx, &nfsi->open_files, list) {
375 if (ctx->state != state)
376 continue;
377 get_nfs_open_context(ctx);
378 spin_unlock(&state->inode->i_lock);
379 return ctx;
380 }
381 spin_unlock(&state->inode->i_lock);
382 return ERR_PTR(-ENOENT);
383}
384
385static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
386{
387 int ret;
388
389 opendata->o_arg.open_flags = openflags;
390 ret = _nfs4_proc_open(opendata);
391 if (ret != 0)
392 return ret;
393 memcpy(stateid->data, opendata->o_res.stateid.data,
394 sizeof(stateid->data));
395 return 0;
396}
397
398static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
399{
400 nfs4_stateid stateid;
401 struct nfs4_state *newstate;
402 int mode = 0;
403 int delegation = 0;
404 int ret;
405
406 /* memory barrier prior to reading state->n_* */
407 smp_rmb();
408 if (state->n_rdwr != 0) {
409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
410 if (ret != 0)
411 return ret;
412 mode |= FMODE_READ|FMODE_WRITE;
413 if (opendata->o_res.delegation_type != 0)
414 delegation = opendata->o_res.delegation_type;
415 smp_rmb();
416 }
417 if (state->n_wronly != 0) {
418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
419 if (ret != 0)
420 return ret;
421 mode |= FMODE_WRITE;
422 if (opendata->o_res.delegation_type != 0)
423 delegation = opendata->o_res.delegation_type;
424 smp_rmb();
425 }
426 if (state->n_rdonly != 0) {
427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
428 if (ret != 0)
429 return ret;
430 mode |= FMODE_READ;
431 }
432 clear_bit(NFS_DELEGATED_STATE, &state->flags);
433 if (mode == 0)
434 return 0;
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,
448 &opendata->o_res);
449 else
450 nfs_inode_reclaim_delegation(newstate->inode,
451 opendata->owner->so_cred,
452 &opendata->o_res);
453 }
454 nfs4_close_state(newstate, opendata->o_arg.open_flags);
455 }
456 if (newstate != state)
457 return -ESTALE;
458 return 0;
459}
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/*
462 * OPEN_RECLAIM:
463 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 */
Trond Myklebust864472e2006-01-03 09:55:15 +0100465static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466{
Trond Myklebust864472e2006-01-03 09:55:15 +0100467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
468 struct nfs4_opendata *opendata;
469 int delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 int status;
471
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);
477 return 0;
478 }
Trond Myklebust864472e2006-01-03 09:55:15 +0100479 delegation_type = delegation->type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 }
Trond Myklebust864472e2006-01-03 09:55:15 +0100481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
482 if (opendata == NULL)
Trond Myklebustcee54fc2005-10-18 14:20:12 -0700483 return -ENOMEM;
Trond Myklebust864472e2006-01-03 09:55:15 +0100484 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 return status;
491}
492
Trond Myklebust864472e2006-01-03 09:55:15 +0100493static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494{
495 struct nfs_server *server = NFS_SERVER(state->inode);
496 struct nfs4_exception exception = { };
497 int err;
498 do {
Trond Myklebust864472e2006-01-03 09:55:15 +0100499 err = _nfs4_do_open_reclaim(sp, state, dentry);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000500 if (err != -NFS4ERR_DELAY)
501 break;
502 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 } while (exception.retry);
504 return err;
505}
506
Trond Myklebust864472e2006-01-03 09:55:15 +0100507static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
508{
509 struct nfs_open_context *ctx;
510 int ret;
511
512 ctx = nfs4_state_find_open_context(state);
513 if (IS_ERR(ctx))
514 return PTR_ERR(ctx);
515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
516 put_nfs_open_context(ctx);
517 return ret;
518}
519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
521{
522 struct nfs4_state_owner *sp = state->owner;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100523 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +0100524 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust864472e2006-01-03 09:55:15 +0100527 return 0;
528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100529 if (opendata == NULL)
Trond Myklebust864472e2006-01-03 09:55:15 +0100530 return -ENOMEM;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
533 sizeof(opendata->o_arg.u.delegation.data));
Trond Myklebust864472e2006-01-03 09:55:15 +0100534 ret = nfs4_open_recover(opendata, state);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100535 nfs4_opendata_free(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100536 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537}
538
539int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
540{
541 struct nfs4_exception exception = { };
542 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
543 int err;
544 do {
545 err = _nfs4_open_delegation_recall(dentry, state);
546 switch (err) {
547 case 0:
548 return err;
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->nfs4_state);
554 return err;
555 }
556 err = nfs4_handle_exception(server, err, &exception);
557 } while (exception.retry);
558 return err;
559}
560
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100561static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100563 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 };
Trond Myklebust26e976a2006-01-03 09:55:21 +0100570 data->timestamp = jiffies;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100571 rpc_call_setup(task, &msg, 0);
572}
573
574static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
575{
576 struct nfs4_opendata *data = calldata;
577
578 data->rpc_status = task->tk_status;
579 if (RPC_ASSASSINATED(task))
580 return;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100581 if (data->rpc_status == 0) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
583 sizeof(data->o_res.stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +0100584 renew_lease(data->o_res.server, data->timestamp);
585 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
588}
589
590static void nfs4_open_confirm_release(void *calldata)
591{
592 struct nfs4_opendata *data = calldata;
593 struct nfs4_state *state = NULL;
594
595 /* If this request hasn't been cancelled, do nothing */
596 if (data->cancelled == 0)
597 goto out_free;
598 /* In case of error, no cleanup! */
599 if (data->rpc_status != 0)
600 goto out_free;
601 nfs_confirm_seqid(&data->owner->so_seqid, 0);
602 state = nfs4_opendata_to_nfs4_state(data);
603 if (state != NULL)
604 nfs4_close_state(state, data->o_arg.open_flags);
605out_free:
606 nfs4_opendata_free(data);
607}
608
609static 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,
613};
614
615/*
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
617 */
618static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
619{
620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
621 struct rpc_task *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 int status;
623
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100624 atomic_inc(&data->count);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500625 /*
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
628 */
629 data->rpc_status = -ENOMEM;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500631 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100632 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100633 status = nfs4_wait_for_completion_rpc_task(task);
634 if (status != 0) {
635 data->cancelled = 1;
636 smp_wmb();
637 } else
638 status = data->rpc_status;
639 rpc_release_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 return status;
641}
642
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100643static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100645 struct nfs4_opendata *data = calldata;
646 struct nfs4_state_owner *sp = data->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 struct rpc_message msg = {
648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100649 .rpc_argp = &data->o_arg,
650 .rpc_resp = &data->o_res,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 .rpc_cred = sp->so_cred,
652 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100653
654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
655 return;
656 /* Update sequence id. */
657 data->o_arg.id = sp->so_id;
658 data->o_arg.clientid = sp->so_client->cl_clientid;
Trond Myklebust864472e2006-01-03 09:55:15 +0100659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust26e976a2006-01-03 09:55:21 +0100661 data->timestamp = jiffies;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100662 rpc_call_setup(task, &msg, 0);
663}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100665static void nfs4_open_done(struct rpc_task *task, void *calldata)
666{
667 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100669 data->rpc_status = task->tk_status;
670 if (RPC_ASSASSINATED(task))
671 return;
672 if (task->tk_status == 0) {
673 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -0700674 case S_IFREG:
675 break;
676 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100677 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700678 break;
679 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100680 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700681 break;
682 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100683 data->rpc_status = -ENOTDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700684 }
Trond Myklebust26e976a2006-01-03 09:55:21 +0100685 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust6f926b52005-10-18 14:20:18 -0700686 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
688}
Trond Myklebust6f926b52005-10-18 14:20:18 -0700689
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100690static void nfs4_open_release(void *calldata)
691{
692 struct nfs4_opendata *data = calldata;
693 struct nfs4_state *state = NULL;
694
695 /* If this request hasn't been cancelled, do nothing */
696 if (data->cancelled == 0)
697 goto out_free;
698 /* In case of error, no cleanup! */
699 if (data->rpc_status != 0)
700 goto out_free;
701 /* In case we need an open_confirm, no cleanup! */
702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
703 goto out_free;
704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
705 state = nfs4_opendata_to_nfs4_state(data);
706 if (state != NULL)
707 nfs4_close_state(state, data->o_arg.open_flags);
708out_free:
709 nfs4_opendata_free(data);
710}
711
712static 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,
716};
717
718/*
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
720 */
721static int _nfs4_proc_open(struct nfs4_opendata *data)
722{
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;
728 int status;
729
730 atomic_inc(&data->count);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500731 /*
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
734 */
735 data->rpc_status = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500737 if (IS_ERR(task))
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100738 return PTR_ERR(task);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100739 status = nfs4_wait_for_completion_rpc_task(task);
740 if (status != 0) {
741 data->cancelled = 1;
742 smp_wmb();
743 } else
744 status = data->rpc_status;
745 rpc_release_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100747 return status;
748
Trond Myklebust56ae19f2005-10-27 22:12:40 -0400749 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);
752 } else
753 nfs_refresh_inode(dir, o_res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100755 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100757 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100761 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
762 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763}
764
765static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
766{
767 struct nfs_access_entry cache;
768 int mask = 0;
769 int status;
770
771 if (openflags & FMODE_READ)
772 mask |= MAY_READ;
773 if (openflags & FMODE_WRITE)
774 mask |= MAY_WRITE;
775 status = nfs_access_get_cached(inode, cred, &cache);
776 if (status == 0)
777 goto out;
778
779 /* Be clever: ask server to check for all possible rights */
780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
781 cache.cred = cred;
782 cache.jiffies = jiffies;
783 status = _nfs4_proc_access(inode, &cache);
784 if (status != 0)
785 return status;
786 nfs_access_add_cache(inode, &cache);
787out:
788 if ((cache.mask & mask) == mask)
789 return 0;
790 return -EACCES;
791}
792
Trond Myklebust58d97142006-01-03 09:55:24 +0100793int nfs4_recover_expired_lease(struct nfs_server *server)
794{
795 struct nfs4_client *clp = server->nfs4_state;
796
797 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
798 nfs4_schedule_state_recovery(clp);
799 return nfs4_wait_clnt_recover(server->client, clp);
800}
801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802/*
803 * OPEN_EXPIRED:
804 * reclaim state on the server after a network partition.
805 * Assumes caller holds the appropriate lock
806 */
807static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
808{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 struct inode *inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100811 struct nfs4_opendata *opendata;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100812 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
Trond Myklebust864472e2006-01-03 09:55:15 +0100813 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
815 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
Trond Myklebust864472e2006-01-03 09:55:15 +0100816 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
817 if (ret < 0)
818 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
820 set_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +0100821 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100823 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100824 if (opendata == NULL)
Trond Myklebust864472e2006-01-03 09:55:15 +0100825 return -ENOMEM;
826 ret = nfs4_open_recover(opendata, state);
827 if (ret == -ESTALE) {
828 /* Invalidate the state owner so we don't ever use it again */
829 nfs4_drop_state_owner(sp);
830 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 }
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100832 nfs4_opendata_free(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100833 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834}
835
Trond Myklebust202b50d2005-06-22 17:16:29 +0000836static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
837{
838 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
839 struct nfs4_exception exception = { };
840 int err;
841
842 do {
843 err = _nfs4_open_expired(sp, state, dentry);
844 if (err == -NFS4ERR_DELAY)
845 nfs4_handle_exception(server, err, &exception);
846 } while (exception.retry);
847 return err;
848}
849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
851{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +0100853 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Trond Myklebust864472e2006-01-03 09:55:15 +0100855 ctx = nfs4_state_find_open_context(state);
856 if (IS_ERR(ctx))
857 return PTR_ERR(ctx);
858 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
859 put_nfs_open_context(ctx);
860 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861}
862
863/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100864 * Returns a referenced nfs4_state if there is an open delegation on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 */
866static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
867{
868 struct nfs_delegation *delegation;
869 struct nfs_server *server = NFS_SERVER(inode);
870 struct nfs4_client *clp = server->nfs4_state;
871 struct nfs_inode *nfsi = NFS_I(inode);
872 struct nfs4_state_owner *sp = NULL;
873 struct nfs4_state *state = NULL;
874 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
875 int err;
876
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100877 err = -ENOMEM;
878 if (!(sp = nfs4_get_state_owner(server, cred))) {
879 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
880 return err;
881 }
Trond Myklebust58d97142006-01-03 09:55:24 +0100882 err = nfs4_recover_expired_lease(server);
883 if (err != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100884 goto out_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 /* Protect against reboot recovery - NOTE ORDER! */
886 down_read(&clp->cl_sem);
887 /* Protect against delegation recall */
888 down_read(&nfsi->rwsem);
889 delegation = NFS_I(inode)->delegation;
890 err = -ENOENT;
891 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
892 goto out_err;
893 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 state = nfs4_get_open_state(inode, sp);
895 if (state == NULL)
896 goto out_err;
897
898 err = -ENOENT;
899 if ((state->state & open_flags) == open_flags) {
900 spin_lock(&inode->i_lock);
Trond Myklebuste7616922006-01-03 09:55:13 +0100901 update_open_stateflags(state, open_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 spin_unlock(&inode->i_lock);
903 goto out_ok;
904 } else if (state->state != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100905 goto out_put_open_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
907 lock_kernel();
908 err = _nfs4_do_access(inode, cred, open_flags);
909 unlock_kernel();
910 if (err != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100911 goto out_put_open_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 set_bit(NFS_DELEGATED_STATE, &state->flags);
913 update_open_stateid(state, &delegation->stateid, open_flags);
914out_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 nfs4_put_state_owner(sp);
916 up_read(&nfsi->rwsem);
917 up_read(&clp->cl_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 *res = state;
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100919 return 0;
920out_put_open_state:
921 nfs4_put_open_state(state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 up_read(&nfsi->rwsem);
924 up_read(&clp->cl_sem);
Trond Myklebustb8e5c4c2005-10-18 14:20:20 -0700925 if (err != -EACCES)
926 nfs_inode_return_delegation(inode);
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100927out_put_state_owner:
928 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 return err;
930}
931
932static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
933{
934 struct nfs4_exception exception = { };
Trond Myklebusta162a6b2006-03-20 13:44:10 -0500935 struct nfs4_state *res = ERR_PTR(-EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 int err;
937
938 do {
939 err = _nfs4_open_delegated(inode, flags, cred, &res);
940 if (err == 0)
941 break;
942 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
943 err, &exception));
944 } while (exception.retry);
945 return res;
946}
947
948/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100949 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 */
951static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
952{
953 struct nfs4_state_owner *sp;
954 struct nfs4_state *state = NULL;
955 struct nfs_server *server = NFS_SERVER(dir);
956 struct nfs4_client *clp = server->nfs4_state;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100957 struct nfs4_opendata *opendata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
960 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 status = -ENOMEM;
962 if (!(sp = nfs4_get_state_owner(server, cred))) {
963 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
964 goto out_err;
965 }
Trond Myklebust58d97142006-01-03 09:55:24 +0100966 status = nfs4_recover_expired_lease(server);
967 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100968 goto err_put_state_owner;
Trond Myklebust58d97142006-01-03 09:55:24 +0100969 down_read(&clp->cl_sem);
970 status = -ENOMEM;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100971 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
972 if (opendata == NULL)
973 goto err_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100975 status = _nfs4_proc_open(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (status != 0)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100977 goto err_opendata_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
979 status = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100980 state = nfs4_opendata_to_nfs4_state(opendata);
981 if (state == NULL)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100982 goto err_opendata_free;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100983 if (opendata->o_res.delegation_type != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100984 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100985 nfs4_opendata_free(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 nfs4_put_state_owner(sp);
987 up_read(&clp->cl_sem);
988 *res = state;
989 return 0;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100990err_opendata_free:
991 nfs4_opendata_free(opendata);
992err_put_state_owner:
993 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
996 up_read(&clp->cl_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 *res = NULL;
998 return status;
999}
1000
1001
1002static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1003{
1004 struct nfs4_exception exception = { };
1005 struct nfs4_state *res;
1006 int status;
1007
1008 do {
1009 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1010 if (status == 0)
1011 break;
1012 /* NOTE: BAD_SEQID means the server and client disagree about the
1013 * book-keeping w.r.t. state-changing operations
1014 * (OPEN/CLOSE/LOCK/LOCKU...)
1015 * It is actually a sign of a bug on the client or on the server.
1016 *
1017 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001018 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 * have unhashed the old state_owner for us, and that we can
1020 * therefore safely retry using a new one. We should still warn
1021 * the user though...
1022 */
1023 if (status == -NFS4ERR_BAD_SEQID) {
1024 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1025 exception.retry = 1;
1026 continue;
1027 }
Trond Myklebust550f5742005-10-18 14:20:21 -07001028 /*
1029 * BAD_STATEID on OPEN means that the server cancelled our
1030 * state before it received the OPEN_CONFIRM.
1031 * Recover by retrying the request as per the discussion
1032 * on Page 181 of RFC3530.
1033 */
1034 if (status == -NFS4ERR_BAD_STATEID) {
1035 exception.retry = 1;
1036 continue;
1037 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1039 status, &exception));
1040 } while (exception.retry);
1041 return res;
1042}
1043
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001044static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1045 struct iattr *sattr, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001047 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001049 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 .iap = sattr,
1051 .server = server,
1052 .bitmask = server->attr_bitmask,
1053 };
1054 struct nfs_setattrres res = {
1055 .fattr = fattr,
1056 .server = server,
1057 };
1058 struct rpc_message msg = {
1059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1060 .rpc_argp = &arg,
1061 .rpc_resp = &res,
1062 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01001063 unsigned long timestamp = jiffies;
Trond Myklebust65e43082005-08-16 11:49:44 -04001064 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
Trond Myklebust0e574af2005-10-27 22:12:38 -04001066 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001068 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1069 /* Use that stateid */
1070 } else if (state != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 msg.rpc_cred = state->owner->so_cred;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001072 nfs4_copy_stateid(&arg.stateid, state, current->files);
1073 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1075
Trond Myklebust65e43082005-08-16 11:49:44 -04001076 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001077 if (status == 0 && state != NULL)
1078 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04001079 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080}
1081
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001082static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1083 struct iattr *sattr, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001085 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 struct nfs4_exception exception = { };
1087 int err;
1088 do {
1089 err = nfs4_handle_exception(server,
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001090 _nfs4_do_setattr(inode, fattr, sattr, state),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 &exception);
1092 } while (exception.retry);
1093 return err;
1094}
1095
1096struct nfs4_closedata {
1097 struct inode *inode;
1098 struct nfs4_state *state;
1099 struct nfs_closeargs arg;
1100 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001101 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001102 unsigned long timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103};
1104
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001105static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07001106{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001107 struct nfs4_closedata *calldata = data;
1108 struct nfs4_state_owner *sp = calldata->state->owner;
Trond Myklebust95121352005-10-18 14:20:12 -07001109
1110 nfs4_put_open_state(calldata->state);
1111 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001112 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07001113 kfree(calldata);
1114}
1115
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001116static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001118 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 struct nfs_server *server = NFS_SERVER(calldata->inode);
1121
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001122 if (RPC_ASSASSINATED(task))
1123 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 /* hmm. we are done with the inode, and in the process of freeing
1125 * the state_owner. we keep this around to process errors
1126 */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001127 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 switch (task->tk_status) {
1129 case 0:
1130 memcpy(&state->stateid, &calldata->res.stateid,
1131 sizeof(state->stateid));
Trond Myklebust26e976a2006-01-03 09:55:21 +01001132 renew_lease(server, calldata->timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 break;
1134 case -NFS4ERR_STALE_STATEID:
1135 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 nfs4_schedule_state_recovery(server->nfs4_state);
1137 break;
1138 default:
1139 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1140 rpc_restart_call(task);
1141 return;
1142 }
1143 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001144 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145}
1146
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001147static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001149 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07001150 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 struct rpc_message msg = {
1152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1153 .rpc_argp = &calldata->arg,
1154 .rpc_resp = &calldata->res,
Trond Myklebust95121352005-10-18 14:20:12 -07001155 .rpc_cred = state->owner->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 };
Trond Myklebust4cecb762005-11-04 15:32:58 -05001157 int mode = 0, old_mode;
Trond Myklebust95121352005-10-18 14:20:12 -07001158
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001159 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebust95121352005-10-18 14:20:12 -07001160 return;
Trond Myklebust95121352005-10-18 14:20:12 -07001161 /* Recalculate the new open mode in case someone reopened the file
1162 * while we were waiting in line to be scheduled.
1163 */
Trond Myklebust4cecb762005-11-04 15:32:58 -05001164 spin_lock(&state->owner->so_lock);
1165 spin_lock(&calldata->inode->i_lock);
1166 mode = old_mode = state->state;
Trond Myklebuste7616922006-01-03 09:55:13 +01001167 if (state->n_rdwr == 0) {
1168 if (state->n_rdonly == 0)
1169 mode &= ~FMODE_READ;
1170 if (state->n_wronly == 0)
1171 mode &= ~FMODE_WRITE;
1172 }
Trond Myklebust4cecb762005-11-04 15:32:58 -05001173 nfs4_state_set_mode_locked(state, mode);
1174 spin_unlock(&calldata->inode->i_lock);
1175 spin_unlock(&state->owner->so_lock);
1176 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001177 /* Note: exit _without_ calling nfs4_close_done */
1178 task->tk_action = NULL;
Trond Myklebust95121352005-10-18 14:20:12 -07001179 return;
1180 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001181 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust95121352005-10-18 14:20:12 -07001182 if (mode != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust95121352005-10-18 14:20:12 -07001184 calldata->arg.open_flags = mode;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001185 calldata->timestamp = jiffies;
Trond Myklebust95121352005-10-18 14:20:12 -07001186 rpc_call_setup(task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187}
1188
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001189static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001190 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001191 .rpc_call_done = nfs4_close_done,
1192 .rpc_release = nfs4_free_closedata,
1193};
1194
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195/*
1196 * It is possible for data to be read/written from a mem-mapped file
1197 * after the sys_close call (which hits the vfs layer as a flush).
1198 * This means that we can't safely call nfsv4 close on a file until
1199 * the inode is cleared. This in turn means that we are not good
1200 * NFSv4 citizens - we do not indicate to the server to update the file's
1201 * share state even when we are done with one of the three share
1202 * stateid's in the inode.
1203 *
1204 * NOTE: Caller must be holding the sp->so_owner semaphore!
1205 */
Trond Myklebust4cecb762005-11-04 15:32:58 -05001206int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207{
Trond Myklebust516a6af2005-10-27 22:12:41 -04001208 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 struct nfs4_closedata *calldata;
Trond Myklebust95121352005-10-18 14:20:12 -07001210 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
Trond Myklebust95121352005-10-18 14:20:12 -07001212 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07001214 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 calldata->inode = inode;
1216 calldata->state = state;
1217 calldata->arg.fh = NFS_FH(inode);
Trond Myklebust95121352005-10-18 14:20:12 -07001218 calldata->arg.stateid = &state->stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 /* Serialization for the sequence id */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001220 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001221 if (calldata->arg.seqid == NULL)
1222 goto out_free_calldata;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001223 calldata->arg.bitmask = server->attr_bitmask;
1224 calldata->res.fattr = &calldata->fattr;
1225 calldata->res.server = server;
Trond Myklebust95121352005-10-18 14:20:12 -07001226
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001227 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
Trond Myklebust95121352005-10-18 14:20:12 -07001228 if (status == 0)
1229 goto out;
1230
1231 nfs_free_seqid(calldata->arg.seqid);
1232out_free_calldata:
1233 kfree(calldata);
1234out:
1235 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236}
1237
Trond Myklebust95cf9592006-04-18 13:14:06 -04001238static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
Trond Myklebust02a913a2005-10-18 14:20:17 -07001239{
1240 struct file *filp;
1241
1242 filp = lookup_instantiate_filp(nd, dentry, NULL);
1243 if (!IS_ERR(filp)) {
1244 struct nfs_open_context *ctx;
1245 ctx = (struct nfs_open_context *)filp->private_data;
1246 ctx->state = state;
Trond Myklebust95cf9592006-04-18 13:14:06 -04001247 return 0;
1248 }
1249 nfs4_close_state(state, nd->intent.open.flags);
1250 return PTR_ERR(filp);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001251}
1252
1253struct dentry *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1255{
1256 struct iattr attr;
1257 struct rpc_cred *cred;
1258 struct nfs4_state *state;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001259 struct dentry *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261 if (nd->flags & LOOKUP_CREATE) {
1262 attr.ia_mode = nd->intent.open.create_mode;
1263 attr.ia_valid = ATTR_MODE;
1264 if (!IS_POSIXACL(dir))
1265 attr.ia_mode &= ~current->fs->umask;
1266 } else {
1267 attr.ia_valid = 0;
1268 BUG_ON(nd->intent.open.flags & O_CREAT);
1269 }
1270
1271 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1272 if (IS_ERR(cred))
Trond Myklebust02a913a2005-10-18 14:20:17 -07001273 return (struct dentry *)cred;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1275 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001276 if (IS_ERR(state)) {
1277 if (PTR_ERR(state) == -ENOENT)
1278 d_add(dentry, NULL);
1279 return (struct dentry *)state;
1280 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001281 res = d_add_unique(dentry, igrab(state->inode));
Trond Myklebust02a913a2005-10-18 14:20:17 -07001282 if (res != NULL)
1283 dentry = res;
1284 nfs4_intent_set_file(nd, dentry, state);
1285 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286}
1287
1288int
Trond Myklebust02a913a2005-10-18 14:20:17 -07001289nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290{
1291 struct rpc_cred *cred;
1292 struct nfs4_state *state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293
1294 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1295 if (IS_ERR(cred))
1296 return PTR_ERR(cred);
1297 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1298 if (IS_ERR(state))
1299 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1300 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001301 if (IS_ERR(state)) {
1302 switch (PTR_ERR(state)) {
1303 case -EPERM:
1304 case -EACCES:
1305 case -EDQUOT:
1306 case -ENOSPC:
1307 case -EROFS:
1308 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1309 return 1;
1310 case -ENOENT:
1311 if (dentry->d_inode == NULL)
1312 return 1;
1313 }
1314 goto out_drop;
1315 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001316 if (state->inode == dentry->d_inode) {
Trond Myklebust02a913a2005-10-18 14:20:17 -07001317 nfs4_intent_set_file(nd, dentry, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 return 1;
1319 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 nfs4_close_state(state, openflags);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001321out_drop:
1322 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 return 0;
1324}
1325
1326
1327static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1328{
1329 struct nfs4_server_caps_res res = {};
1330 struct rpc_message msg = {
1331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1332 .rpc_argp = fhandle,
1333 .rpc_resp = &res,
1334 };
1335 int status;
1336
1337 status = rpc_call_sync(server->client, &msg, 0);
1338 if (status == 0) {
1339 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1340 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1341 server->caps |= NFS_CAP_ACLS;
1342 if (res.has_links != 0)
1343 server->caps |= NFS_CAP_HARDLINKS;
1344 if (res.has_symlinks != 0)
1345 server->caps |= NFS_CAP_SYMLINKS;
1346 server->acl_bitmask = res.acl_bitmask;
1347 }
1348 return status;
1349}
1350
Trond Myklebust55a97592006-06-09 09:34:19 -04001351int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352{
1353 struct nfs4_exception exception = { };
1354 int err;
1355 do {
1356 err = nfs4_handle_exception(server,
1357 _nfs4_server_capabilities(server, fhandle),
1358 &exception);
1359 } while (exception.retry);
1360 return err;
1361}
1362
1363static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1364 struct nfs_fsinfo *info)
1365{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 struct nfs4_lookup_root_arg args = {
1367 .bitmask = nfs4_fattr_bitmap,
1368 };
1369 struct nfs4_lookup_res res = {
1370 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04001371 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 .fh = fhandle,
1373 };
1374 struct rpc_message msg = {
1375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1376 .rpc_argp = &args,
1377 .rpc_resp = &res,
1378 };
Trond Myklebust0e574af2005-10-27 22:12:38 -04001379 nfs_fattr_init(info->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 return rpc_call_sync(server->client, &msg, 0);
1381}
1382
1383static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1384 struct nfs_fsinfo *info)
1385{
1386 struct nfs4_exception exception = { };
1387 int err;
1388 do {
1389 err = nfs4_handle_exception(server,
1390 _nfs4_lookup_root(server, fhandle, info),
1391 &exception);
1392 } while (exception.retry);
1393 return err;
1394}
1395
1396static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1397 struct nfs_fsinfo *info)
1398{
1399 struct nfs_fattr * fattr = info->fattr;
1400 unsigned char * p;
1401 struct qstr q;
1402 struct nfs4_lookup_arg args = {
1403 .dir_fh = fhandle,
1404 .name = &q,
1405 .bitmask = nfs4_fattr_bitmap,
1406 };
1407 struct nfs4_lookup_res res = {
1408 .server = server,
1409 .fattr = fattr,
1410 .fh = fhandle,
1411 };
1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1414 .rpc_argp = &args,
1415 .rpc_resp = &res,
1416 };
1417 int status;
1418
1419 /*
1420 * Now we do a separate LOOKUP for each component of the mount path.
1421 * The LOOKUPs are done separately so that we can conveniently
1422 * catch an ERR_WRONGSEC if it occurs along the way...
1423 */
1424 status = nfs4_lookup_root(server, fhandle, info);
1425 if (status)
1426 goto out;
1427
1428 p = server->mnt_path;
1429 for (;;) {
1430 struct nfs4_exception exception = { };
1431
1432 while (*p == '/')
1433 p++;
1434 if (!*p)
1435 break;
1436 q.name = p;
1437 while (*p && (*p != '/'))
1438 p++;
1439 q.len = p - q.name;
1440
1441 do {
Trond Myklebust0e574af2005-10-27 22:12:38 -04001442 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 status = nfs4_handle_exception(server,
1444 rpc_call_sync(server->client, &msg, 0),
1445 &exception);
1446 } while (exception.retry);
1447 if (status == 0)
1448 continue;
1449 if (status == -ENOENT) {
1450 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1451 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1452 }
1453 break;
1454 }
1455 if (status == 0)
1456 status = nfs4_server_capabilities(server, fhandle);
1457 if (status == 0)
1458 status = nfs4_do_fsinfo(server, fhandle, info);
1459out:
Trond Myklebustc12e87f2006-03-13 21:20:47 -08001460 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461}
1462
Manoj Naik6b97fd32006-06-09 09:34:29 -04001463/*
1464 * Get locations and (maybe) other attributes of a referral.
1465 * Note that we'll actually follow the referral later when
1466 * we detect fsid mismatch in inode revalidation
1467 */
1468static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1469{
1470 int status = -ENOMEM;
1471 struct page *page = NULL;
1472 struct nfs4_fs_locations *locations = NULL;
1473 struct dentry dentry = {};
1474
1475 page = alloc_page(GFP_KERNEL);
1476 if (page == NULL)
1477 goto out;
1478 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1479 if (locations == NULL)
1480 goto out;
1481
1482 dentry.d_name.name = name->name;
1483 dentry.d_name.len = name->len;
1484 status = nfs4_proc_fs_locations(dir, &dentry, locations, page);
1485 if (status != 0)
1486 goto out;
1487 /* Make sure server returned a different fsid for the referral */
1488 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1489 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1490 status = -EIO;
1491 goto out;
1492 }
1493
1494 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1495 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1496 if (!fattr->mode)
1497 fattr->mode = S_IFDIR;
1498 memset(fhandle, 0, sizeof(struct nfs_fh));
1499out:
1500 if (page)
1501 __free_page(page);
1502 if (locations)
1503 kfree(locations);
1504 return status;
1505}
1506
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1508{
1509 struct nfs4_getattr_arg args = {
1510 .fh = fhandle,
1511 .bitmask = server->attr_bitmask,
1512 };
1513 struct nfs4_getattr_res res = {
1514 .fattr = fattr,
1515 .server = server,
1516 };
1517 struct rpc_message msg = {
1518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1519 .rpc_argp = &args,
1520 .rpc_resp = &res,
1521 };
1522
Trond Myklebust0e574af2005-10-27 22:12:38 -04001523 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 return rpc_call_sync(server->client, &msg, 0);
1525}
1526
1527static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1528{
1529 struct nfs4_exception exception = { };
1530 int err;
1531 do {
1532 err = nfs4_handle_exception(server,
1533 _nfs4_proc_getattr(server, fhandle, fattr),
1534 &exception);
1535 } while (exception.retry);
1536 return err;
1537}
1538
1539/*
1540 * The file is not closed if it is opened due to the a request to change
1541 * the size of the file. The open call will not be needed once the
1542 * VFS layer lookup-intents are implemented.
1543 *
1544 * Close is called when the inode is destroyed.
1545 * If we haven't opened the file for O_WRONLY, we
1546 * need to in the size_change case to obtain a stateid.
1547 *
1548 * Got race?
1549 * Because OPEN is always done by name in nfsv4, it is
1550 * possible that we opened a different file by the same
1551 * name. We can recognize this race condition, but we
1552 * can't do anything about it besides returning an error.
1553 *
1554 * This will be fixed with VFS changes (lookup-intent).
1555 */
1556static int
1557nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1558 struct iattr *sattr)
1559{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001560 struct rpc_cred *cred;
1561 struct inode *inode = dentry->d_inode;
Trond Myklebustd5308382005-11-04 15:33:38 -05001562 struct nfs_open_context *ctx;
1563 struct nfs4_state *state = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 int status;
1565
Trond Myklebust0e574af2005-10-27 22:12:38 -04001566 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001568 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1569 if (IS_ERR(cred))
1570 return PTR_ERR(cred);
Trond Myklebustd5308382005-11-04 15:33:38 -05001571
1572 /* Search for an existing open(O_WRITE) file */
1573 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1574 if (ctx != NULL)
1575 state = ctx->state;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001576
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001577 status = nfs4_do_setattr(inode, fattr, sattr, state);
Trond Myklebust65e43082005-08-16 11:49:44 -04001578 if (status == 0)
1579 nfs_setattr_update_inode(inode, sattr);
Trond Myklebustd5308382005-11-04 15:33:38 -05001580 if (ctx != NULL)
1581 put_nfs_open_context(ctx);
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001582 put_rpccred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 return status;
1584}
1585
1586static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1587 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1588{
1589 int status;
1590 struct nfs_server *server = NFS_SERVER(dir);
1591 struct nfs4_lookup_arg args = {
1592 .bitmask = server->attr_bitmask,
1593 .dir_fh = NFS_FH(dir),
1594 .name = name,
1595 };
1596 struct nfs4_lookup_res res = {
1597 .server = server,
1598 .fattr = fattr,
1599 .fh = fhandle,
1600 };
1601 struct rpc_message msg = {
1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1603 .rpc_argp = &args,
1604 .rpc_resp = &res,
1605 };
1606
Trond Myklebust0e574af2005-10-27 22:12:38 -04001607 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
1609 dprintk("NFS call lookup %s\n", name->name);
1610 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001611 if (status == -NFS4ERR_MOVED)
1612 status = nfs4_get_referral(dir, name, fattr, fhandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 dprintk("NFS reply lookup: %d\n", status);
1614 return status;
1615}
1616
1617static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1618{
1619 struct nfs4_exception exception = { };
1620 int err;
1621 do {
1622 err = nfs4_handle_exception(NFS_SERVER(dir),
1623 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1624 &exception);
1625 } while (exception.retry);
1626 return err;
1627}
1628
1629static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1630{
1631 struct nfs4_accessargs args = {
1632 .fh = NFS_FH(inode),
1633 };
1634 struct nfs4_accessres res = { 0 };
1635 struct rpc_message msg = {
1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1637 .rpc_argp = &args,
1638 .rpc_resp = &res,
1639 .rpc_cred = entry->cred,
1640 };
1641 int mode = entry->mask;
1642 int status;
1643
1644 /*
1645 * Determine which access bits we want to ask for...
1646 */
1647 if (mode & MAY_READ)
1648 args.access |= NFS4_ACCESS_READ;
1649 if (S_ISDIR(inode->i_mode)) {
1650 if (mode & MAY_WRITE)
1651 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1652 if (mode & MAY_EXEC)
1653 args.access |= NFS4_ACCESS_LOOKUP;
1654 } else {
1655 if (mode & MAY_WRITE)
1656 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1657 if (mode & MAY_EXEC)
1658 args.access |= NFS4_ACCESS_EXECUTE;
1659 }
1660 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1661 if (!status) {
1662 entry->mask = 0;
1663 if (res.access & NFS4_ACCESS_READ)
1664 entry->mask |= MAY_READ;
1665 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1666 entry->mask |= MAY_WRITE;
1667 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1668 entry->mask |= MAY_EXEC;
1669 }
1670 return status;
1671}
1672
1673static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1674{
1675 struct nfs4_exception exception = { };
1676 int err;
1677 do {
1678 err = nfs4_handle_exception(NFS_SERVER(inode),
1679 _nfs4_proc_access(inode, entry),
1680 &exception);
1681 } while (exception.retry);
1682 return err;
1683}
1684
1685/*
1686 * TODO: For the time being, we don't try to get any attributes
1687 * along with any of the zero-copy operations READ, READDIR,
1688 * READLINK, WRITE.
1689 *
1690 * In the case of the first three, we want to put the GETATTR
1691 * after the read-type operation -- this is because it is hard
1692 * to predict the length of a GETATTR response in v4, and thus
1693 * align the READ data correctly. This means that the GETATTR
1694 * may end up partially falling into the page cache, and we should
1695 * shift it into the 'tail' of the xdr_buf before processing.
1696 * To do this efficiently, we need to know the total length
1697 * of data received, which doesn't seem to be available outside
1698 * of the RPC layer.
1699 *
1700 * In the case of WRITE, we also want to put the GETATTR after
1701 * the operation -- in this case because we want to make sure
1702 * we get the post-operation mtime and size. This means that
1703 * we can't use xdr_encode_pages() as written: we need a variant
1704 * of it which would leave room in the 'tail' iovec.
1705 *
1706 * Both of these changes to the XDR layer would in fact be quite
1707 * minor, but I decided to leave them for a subsequent patch.
1708 */
1709static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1710 unsigned int pgbase, unsigned int pglen)
1711{
1712 struct nfs4_readlink args = {
1713 .fh = NFS_FH(inode),
1714 .pgbase = pgbase,
1715 .pglen = pglen,
1716 .pages = &page,
1717 };
1718 struct rpc_message msg = {
1719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1720 .rpc_argp = &args,
1721 .rpc_resp = NULL,
1722 };
1723
1724 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1725}
1726
1727static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1728 unsigned int pgbase, unsigned int pglen)
1729{
1730 struct nfs4_exception exception = { };
1731 int err;
1732 do {
1733 err = nfs4_handle_exception(NFS_SERVER(inode),
1734 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1735 &exception);
1736 } while (exception.retry);
1737 return err;
1738}
1739
1740static int _nfs4_proc_read(struct nfs_read_data *rdata)
1741{
1742 int flags = rdata->flags;
1743 struct inode *inode = rdata->inode;
1744 struct nfs_fattr *fattr = rdata->res.fattr;
1745 struct nfs_server *server = NFS_SERVER(inode);
1746 struct rpc_message msg = {
1747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1748 .rpc_argp = &rdata->args,
1749 .rpc_resp = &rdata->res,
1750 .rpc_cred = rdata->cred,
1751 };
1752 unsigned long timestamp = jiffies;
1753 int status;
1754
1755 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1756 (long long) rdata->args.offset);
1757
Trond Myklebust0e574af2005-10-27 22:12:38 -04001758 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 status = rpc_call_sync(server->client, &msg, flags);
1760 if (!status)
1761 renew_lease(server, timestamp);
1762 dprintk("NFS reply read: %d\n", status);
1763 return status;
1764}
1765
1766static int nfs4_proc_read(struct nfs_read_data *rdata)
1767{
1768 struct nfs4_exception exception = { };
1769 int err;
1770 do {
1771 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1772 _nfs4_proc_read(rdata),
1773 &exception);
1774 } while (exception.retry);
1775 return err;
1776}
1777
1778static int _nfs4_proc_write(struct nfs_write_data *wdata)
1779{
1780 int rpcflags = wdata->flags;
1781 struct inode *inode = wdata->inode;
1782 struct nfs_fattr *fattr = wdata->res.fattr;
1783 struct nfs_server *server = NFS_SERVER(inode);
1784 struct rpc_message msg = {
1785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1786 .rpc_argp = &wdata->args,
1787 .rpc_resp = &wdata->res,
1788 .rpc_cred = wdata->cred,
1789 };
1790 int status;
1791
1792 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1793 (long long) wdata->args.offset);
1794
Trond Myklebust3b6efee2005-12-03 15:20:21 -05001795 wdata->args.bitmask = server->attr_bitmask;
1796 wdata->res.server = server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001797 wdata->timestamp = jiffies;
Trond Myklebust0e574af2005-10-27 22:12:38 -04001798 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 status = rpc_call_sync(server->client, &msg, rpcflags);
1800 dprintk("NFS reply write: %d\n", status);
Trond Myklebust3b6efee2005-12-03 15:20:21 -05001801 if (status < 0)
1802 return status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001803 renew_lease(server, wdata->timestamp);
Trond Myklebust3b6efee2005-12-03 15:20:21 -05001804 nfs_post_op_update_inode(inode, fattr);
1805 return wdata->res.count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806}
1807
1808static int nfs4_proc_write(struct nfs_write_data *wdata)
1809{
1810 struct nfs4_exception exception = { };
1811 int err;
1812 do {
1813 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1814 _nfs4_proc_write(wdata),
1815 &exception);
1816 } while (exception.retry);
1817 return err;
1818}
1819
1820static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1821{
1822 struct inode *inode = cdata->inode;
1823 struct nfs_fattr *fattr = cdata->res.fattr;
1824 struct nfs_server *server = NFS_SERVER(inode);
1825 struct rpc_message msg = {
1826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1827 .rpc_argp = &cdata->args,
1828 .rpc_resp = &cdata->res,
1829 .rpc_cred = cdata->cred,
1830 };
1831 int status;
1832
1833 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1834 (long long) cdata->args.offset);
1835
Trond Myklebust3b6efee2005-12-03 15:20:21 -05001836 cdata->args.bitmask = server->attr_bitmask;
1837 cdata->res.server = server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001838 cdata->timestamp = jiffies;
Trond Myklebust0e574af2005-10-27 22:12:38 -04001839 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001841 if (status >= 0)
1842 renew_lease(server, cdata->timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 dprintk("NFS reply commit: %d\n", status);
Trond Myklebust3b6efee2005-12-03 15:20:21 -05001844 if (status >= 0)
1845 nfs_post_op_update_inode(inode, fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 return status;
1847}
1848
1849static int nfs4_proc_commit(struct nfs_write_data *cdata)
1850{
1851 struct nfs4_exception exception = { };
1852 int err;
1853 do {
1854 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1855 _nfs4_proc_commit(cdata),
1856 &exception);
1857 } while (exception.retry);
1858 return err;
1859}
1860
1861/*
1862 * Got race?
1863 * We will need to arrange for the VFS layer to provide an atomic open.
1864 * Until then, this create/open method is prone to inefficiency and race
1865 * conditions due to the lookup, create, and open VFS calls from sys_open()
1866 * placed on the wire.
1867 *
1868 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1869 * The file will be opened again in the subsequent VFS open call
1870 * (nfs4_proc_file_open).
1871 *
1872 * The open for read will just hang around to be used by any process that
1873 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1874 */
1875
1876static int
1877nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Trond Myklebust02a913a2005-10-18 14:20:17 -07001878 int flags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879{
1880 struct nfs4_state *state;
1881 struct rpc_cred *cred;
1882 int status = 0;
1883
1884 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1885 if (IS_ERR(cred)) {
1886 status = PTR_ERR(cred);
1887 goto out;
1888 }
1889 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1890 put_rpccred(cred);
1891 if (IS_ERR(state)) {
1892 status = PTR_ERR(state);
1893 goto out;
1894 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001895 d_instantiate(dentry, igrab(state->inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 if (flags & O_EXCL) {
1897 struct nfs_fattr fattr;
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001898 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001899 if (status == 0)
Trond Myklebust65e43082005-08-16 11:49:44 -04001900 nfs_setattr_update_inode(state->inode, sattr);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001901 }
1902 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
Trond Myklebust95cf9592006-04-18 13:14:06 -04001903 status = nfs4_intent_set_file(nd, dentry, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001904 else
1905 nfs4_close_state(state, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906out:
1907 return status;
1908}
1909
1910static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1911{
Trond Myklebust16e42952005-10-27 22:12:44 -04001912 struct nfs_server *server = NFS_SERVER(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 struct nfs4_remove_arg args = {
1914 .fh = NFS_FH(dir),
1915 .name = name,
Trond Myklebust16e42952005-10-27 22:12:44 -04001916 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 };
Trond Myklebust16e42952005-10-27 22:12:44 -04001918 struct nfs_fattr dir_attr;
1919 struct nfs4_remove_res res = {
1920 .server = server,
1921 .dir_attr = &dir_attr,
1922 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 struct rpc_message msg = {
1924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1925 .rpc_argp = &args,
1926 .rpc_resp = &res,
1927 };
1928 int status;
1929
Trond Myklebust16e42952005-10-27 22:12:44 -04001930 nfs_fattr_init(res.dir_attr);
1931 status = rpc_call_sync(server->client, &msg, 0);
1932 if (status == 0) {
1933 update_changeattr(dir, &res.cinfo);
1934 nfs_post_op_update_inode(dir, res.dir_attr);
1935 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 return status;
1937}
1938
1939static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1940{
1941 struct nfs4_exception exception = { };
1942 int err;
1943 do {
1944 err = nfs4_handle_exception(NFS_SERVER(dir),
1945 _nfs4_proc_remove(dir, name),
1946 &exception);
1947 } while (exception.retry);
1948 return err;
1949}
1950
1951struct unlink_desc {
1952 struct nfs4_remove_arg args;
Trond Myklebust16e42952005-10-27 22:12:44 -04001953 struct nfs4_remove_res res;
1954 struct nfs_fattr dir_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955};
1956
1957static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1958 struct qstr *name)
1959{
Trond Myklebust16e42952005-10-27 22:12:44 -04001960 struct nfs_server *server = NFS_SERVER(dir->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 struct unlink_desc *up;
1962
1963 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1964 if (!up)
1965 return -ENOMEM;
1966
1967 up->args.fh = NFS_FH(dir->d_inode);
1968 up->args.name = name;
Trond Myklebust16e42952005-10-27 22:12:44 -04001969 up->args.bitmask = server->attr_bitmask;
1970 up->res.server = server;
1971 up->res.dir_attr = &up->dir_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972
1973 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1974 msg->rpc_argp = &up->args;
1975 msg->rpc_resp = &up->res;
1976 return 0;
1977}
1978
1979static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1980{
1981 struct rpc_message *msg = &task->tk_msg;
1982 struct unlink_desc *up;
1983
1984 if (msg->rpc_resp != NULL) {
1985 up = container_of(msg->rpc_resp, struct unlink_desc, res);
Trond Myklebust16e42952005-10-27 22:12:44 -04001986 update_changeattr(dir->d_inode, &up->res.cinfo);
1987 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988 kfree(up);
1989 msg->rpc_resp = NULL;
1990 msg->rpc_argp = NULL;
1991 }
1992 return 0;
1993}
1994
1995static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1996 struct inode *new_dir, struct qstr *new_name)
1997{
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001998 struct nfs_server *server = NFS_SERVER(old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 struct nfs4_rename_arg arg = {
2000 .old_dir = NFS_FH(old_dir),
2001 .new_dir = NFS_FH(new_dir),
2002 .old_name = old_name,
2003 .new_name = new_name,
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002004 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 };
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002006 struct nfs_fattr old_fattr, new_fattr;
2007 struct nfs4_rename_res res = {
2008 .server = server,
2009 .old_fattr = &old_fattr,
2010 .new_fattr = &new_fattr,
2011 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 struct rpc_message msg = {
2013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2014 .rpc_argp = &arg,
2015 .rpc_resp = &res,
2016 };
2017 int status;
2018
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002019 nfs_fattr_init(res.old_fattr);
2020 nfs_fattr_init(res.new_fattr);
2021 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022
2023 if (!status) {
2024 update_changeattr(old_dir, &res.old_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002025 nfs_post_op_update_inode(old_dir, res.old_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 update_changeattr(new_dir, &res.new_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002027 nfs_post_op_update_inode(new_dir, res.new_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 }
2029 return status;
2030}
2031
2032static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2033 struct inode *new_dir, struct qstr *new_name)
2034{
2035 struct nfs4_exception exception = { };
2036 int err;
2037 do {
2038 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2039 _nfs4_proc_rename(old_dir, old_name,
2040 new_dir, new_name),
2041 &exception);
2042 } while (exception.retry);
2043 return err;
2044}
2045
2046static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2047{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002048 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 struct nfs4_link_arg arg = {
2050 .fh = NFS_FH(inode),
2051 .dir_fh = NFS_FH(dir),
2052 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002053 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002055 struct nfs_fattr fattr, dir_attr;
2056 struct nfs4_link_res res = {
2057 .server = server,
2058 .fattr = &fattr,
2059 .dir_attr = &dir_attr,
2060 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 struct rpc_message msg = {
2062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2063 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002064 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 };
2066 int status;
2067
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002068 nfs_fattr_init(res.fattr);
2069 nfs_fattr_init(res.dir_attr);
2070 status = rpc_call_sync(server->client, &msg, 0);
2071 if (!status) {
2072 update_changeattr(dir, &res.cinfo);
2073 nfs_post_op_update_inode(dir, res.dir_attr);
Trond Myklebust73a3d072006-05-25 01:40:47 -04002074 nfs_post_op_update_inode(inode, res.fattr);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002075 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076
2077 return status;
2078}
2079
2080static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2081{
2082 struct nfs4_exception exception = { };
2083 int err;
2084 do {
2085 err = nfs4_handle_exception(NFS_SERVER(inode),
2086 _nfs4_proc_link(inode, dir, name),
2087 &exception);
2088 } while (exception.retry);
2089 return err;
2090}
2091
2092static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2093 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2094 struct nfs_fattr *fattr)
2095{
2096 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002097 struct nfs_fattr dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098 struct nfs4_create_arg arg = {
2099 .dir_fh = NFS_FH(dir),
2100 .server = server,
2101 .name = name,
2102 .attrs = sattr,
2103 .ftype = NF4LNK,
2104 .bitmask = server->attr_bitmask,
2105 };
2106 struct nfs4_create_res res = {
2107 .server = server,
2108 .fh = fhandle,
2109 .fattr = fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002110 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 };
2112 struct rpc_message msg = {
2113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2114 .rpc_argp = &arg,
2115 .rpc_resp = &res,
2116 };
2117 int status;
2118
2119 if (path->len > NFS4_MAXPATHLEN)
2120 return -ENAMETOOLONG;
2121 arg.u.symlink = path;
Trond Myklebust0e574af2005-10-27 22:12:38 -04002122 nfs_fattr_init(fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002123 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124
2125 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2126 if (!status)
2127 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002128 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129 return status;
2130}
2131
2132static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2133 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2134 struct nfs_fattr *fattr)
2135{
2136 struct nfs4_exception exception = { };
2137 int err;
2138 do {
2139 err = nfs4_handle_exception(NFS_SERVER(dir),
2140 _nfs4_proc_symlink(dir, name, path, sattr,
2141 fhandle, fattr),
2142 &exception);
2143 } while (exception.retry);
2144 return err;
2145}
2146
2147static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2148 struct iattr *sattr)
2149{
2150 struct nfs_server *server = NFS_SERVER(dir);
2151 struct nfs_fh fhandle;
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002152 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 struct nfs4_create_arg arg = {
2154 .dir_fh = NFS_FH(dir),
2155 .server = server,
2156 .name = &dentry->d_name,
2157 .attrs = sattr,
2158 .ftype = NF4DIR,
2159 .bitmask = server->attr_bitmask,
2160 };
2161 struct nfs4_create_res res = {
2162 .server = server,
2163 .fh = &fhandle,
2164 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002165 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 };
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2169 .rpc_argp = &arg,
2170 .rpc_resp = &res,
2171 };
2172 int status;
2173
Trond Myklebust0e574af2005-10-27 22:12:38 -04002174 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002175 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176
2177 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2178 if (!status) {
2179 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002180 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 status = nfs_instantiate(dentry, &fhandle, &fattr);
2182 }
2183 return status;
2184}
2185
2186static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2187 struct iattr *sattr)
2188{
2189 struct nfs4_exception exception = { };
2190 int err;
2191 do {
2192 err = nfs4_handle_exception(NFS_SERVER(dir),
2193 _nfs4_proc_mkdir(dir, dentry, sattr),
2194 &exception);
2195 } while (exception.retry);
2196 return err;
2197}
2198
2199static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2200 u64 cookie, struct page *page, unsigned int count, int plus)
2201{
2202 struct inode *dir = dentry->d_inode;
2203 struct nfs4_readdir_arg args = {
2204 .fh = NFS_FH(dir),
2205 .pages = &page,
2206 .pgbase = 0,
2207 .count = count,
2208 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2209 };
2210 struct nfs4_readdir_res res;
2211 struct rpc_message msg = {
2212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2213 .rpc_argp = &args,
2214 .rpc_resp = &res,
2215 .rpc_cred = cred,
2216 };
2217 int status;
2218
Trond Myklebusteadf4592005-06-22 17:16:39 +00002219 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2220 dentry->d_parent->d_name.name,
2221 dentry->d_name.name,
2222 (unsigned long long)cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 lock_kernel();
2224 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2225 res.pgbase = args.pgbase;
2226 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2227 if (status == 0)
2228 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2229 unlock_kernel();
Trond Myklebusteadf4592005-06-22 17:16:39 +00002230 dprintk("%s: returns %d\n", __FUNCTION__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231 return status;
2232}
2233
2234static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2235 u64 cookie, struct page *page, unsigned int count, int plus)
2236{
2237 struct nfs4_exception exception = { };
2238 int err;
2239 do {
2240 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2241 _nfs4_proc_readdir(dentry, cred, cookie,
2242 page, count, plus),
2243 &exception);
2244 } while (exception.retry);
2245 return err;
2246}
2247
2248static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2249 struct iattr *sattr, dev_t rdev)
2250{
2251 struct nfs_server *server = NFS_SERVER(dir);
2252 struct nfs_fh fh;
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002253 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 struct nfs4_create_arg arg = {
2255 .dir_fh = NFS_FH(dir),
2256 .server = server,
2257 .name = &dentry->d_name,
2258 .attrs = sattr,
2259 .bitmask = server->attr_bitmask,
2260 };
2261 struct nfs4_create_res res = {
2262 .server = server,
2263 .fh = &fh,
2264 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002265 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266 };
2267 struct rpc_message msg = {
2268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2269 .rpc_argp = &arg,
2270 .rpc_resp = &res,
2271 };
2272 int status;
2273 int mode = sattr->ia_mode;
2274
Trond Myklebust0e574af2005-10-27 22:12:38 -04002275 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002276 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
2278 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2279 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2280 if (S_ISFIFO(mode))
2281 arg.ftype = NF4FIFO;
2282 else if (S_ISBLK(mode)) {
2283 arg.ftype = NF4BLK;
2284 arg.u.device.specdata1 = MAJOR(rdev);
2285 arg.u.device.specdata2 = MINOR(rdev);
2286 }
2287 else if (S_ISCHR(mode)) {
2288 arg.ftype = NF4CHR;
2289 arg.u.device.specdata1 = MAJOR(rdev);
2290 arg.u.device.specdata2 = MINOR(rdev);
2291 }
2292 else
2293 arg.ftype = NF4SOCK;
2294
2295 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2296 if (status == 0) {
2297 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002298 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 status = nfs_instantiate(dentry, &fh, &fattr);
2300 }
2301 return status;
2302}
2303
2304static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2305 struct iattr *sattr, dev_t rdev)
2306{
2307 struct nfs4_exception exception = { };
2308 int err;
2309 do {
2310 err = nfs4_handle_exception(NFS_SERVER(dir),
2311 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2312 &exception);
2313 } while (exception.retry);
2314 return err;
2315}
2316
2317static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2318 struct nfs_fsstat *fsstat)
2319{
2320 struct nfs4_statfs_arg args = {
2321 .fh = fhandle,
2322 .bitmask = server->attr_bitmask,
2323 };
2324 struct rpc_message msg = {
2325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2326 .rpc_argp = &args,
2327 .rpc_resp = fsstat,
2328 };
2329
Trond Myklebust0e574af2005-10-27 22:12:38 -04002330 nfs_fattr_init(fsstat->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 return rpc_call_sync(server->client, &msg, 0);
2332}
2333
2334static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2335{
2336 struct nfs4_exception exception = { };
2337 int err;
2338 do {
2339 err = nfs4_handle_exception(server,
2340 _nfs4_proc_statfs(server, fhandle, fsstat),
2341 &exception);
2342 } while (exception.retry);
2343 return err;
2344}
2345
2346static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2347 struct nfs_fsinfo *fsinfo)
2348{
2349 struct nfs4_fsinfo_arg args = {
2350 .fh = fhandle,
2351 .bitmask = server->attr_bitmask,
2352 };
2353 struct rpc_message msg = {
2354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2355 .rpc_argp = &args,
2356 .rpc_resp = fsinfo,
2357 };
2358
2359 return rpc_call_sync(server->client, &msg, 0);
2360}
2361
2362static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2363{
2364 struct nfs4_exception exception = { };
2365 int err;
2366
2367 do {
2368 err = nfs4_handle_exception(server,
2369 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2370 &exception);
2371 } while (exception.retry);
2372 return err;
2373}
2374
2375static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2376{
Trond Myklebust0e574af2005-10-27 22:12:38 -04002377 nfs_fattr_init(fsinfo->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2379}
2380
2381static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2382 struct nfs_pathconf *pathconf)
2383{
2384 struct nfs4_pathconf_arg args = {
2385 .fh = fhandle,
2386 .bitmask = server->attr_bitmask,
2387 };
2388 struct rpc_message msg = {
2389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2390 .rpc_argp = &args,
2391 .rpc_resp = pathconf,
2392 };
2393
2394 /* None of the pathconf attributes are mandatory to implement */
2395 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2396 memset(pathconf, 0, sizeof(*pathconf));
2397 return 0;
2398 }
2399
Trond Myklebust0e574af2005-10-27 22:12:38 -04002400 nfs_fattr_init(pathconf->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002401 return rpc_call_sync(server->client, &msg, 0);
2402}
2403
2404static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2405 struct nfs_pathconf *pathconf)
2406{
2407 struct nfs4_exception exception = { };
2408 int err;
2409
2410 do {
2411 err = nfs4_handle_exception(server,
2412 _nfs4_proc_pathconf(server, fhandle, pathconf),
2413 &exception);
2414 } while (exception.retry);
2415 return err;
2416}
2417
Trond Myklebustec06c092006-03-20 13:44:27 -05002418static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419{
Trond Myklebustec06c092006-03-20 13:44:27 -05002420 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421
Trond Myklebustec06c092006-03-20 13:44:27 -05002422 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 rpc_restart_call(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05002424 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002425 }
2426 if (task->tk_status > 0)
Trond Myklebustec06c092006-03-20 13:44:27 -05002427 renew_lease(server, data->timestamp);
2428 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429}
2430
Trond Myklebustec06c092006-03-20 13:44:27 -05002431static void nfs4_proc_read_setup(struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 struct rpc_message msg = {
2434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2435 .rpc_argp = &data->args,
2436 .rpc_resp = &data->res,
2437 .rpc_cred = data->cred,
2438 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439
2440 data->timestamp = jiffies;
2441
Trond Myklebustec06c092006-03-20 13:44:27 -05002442 rpc_call_setup(&data->task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443}
2444
Trond Myklebust788e7a82006-03-20 13:44:27 -05002445static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447 struct inode *inode = data->inode;
2448
2449 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2450 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002451 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002453 if (task->tk_status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454 renew_lease(NFS_SERVER(inode), data->timestamp);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002455 nfs_post_op_update_inode(inode, data->res.fattr);
2456 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05002457 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458}
2459
Trond Myklebust788e7a82006-03-20 13:44:27 -05002460static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462 struct rpc_message msg = {
2463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2464 .rpc_argp = &data->args,
2465 .rpc_resp = &data->res,
2466 .rpc_cred = data->cred,
2467 };
2468 struct inode *inode = data->inode;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002469 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470 int stable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471
2472 if (how & FLUSH_STABLE) {
2473 if (!NFS_I(inode)->ncommit)
2474 stable = NFS_FILE_SYNC;
2475 else
2476 stable = NFS_DATA_SYNC;
2477 } else
2478 stable = NFS_UNSTABLE;
2479 data->args.stable = stable;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002480 data->args.bitmask = server->attr_bitmask;
2481 data->res.server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482
2483 data->timestamp = jiffies;
2484
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485 /* Finalize the task. */
Trond Myklebust788e7a82006-03-20 13:44:27 -05002486 rpc_call_setup(&data->task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002487}
2488
Trond Myklebust788e7a82006-03-20 13:44:27 -05002489static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491 struct inode *inode = data->inode;
2492
2493 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2494 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002495 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002497 if (task->tk_status >= 0)
2498 nfs_post_op_update_inode(inode, data->res.fattr);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002499 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500}
2501
Trond Myklebust788e7a82006-03-20 13:44:27 -05002502static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504 struct rpc_message msg = {
2505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2506 .rpc_argp = &data->args,
2507 .rpc_resp = &data->res,
2508 .rpc_cred = data->cred,
2509 };
Trond Myklebust788e7a82006-03-20 13:44:27 -05002510 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002512 data->args.bitmask = server->attr_bitmask;
2513 data->res.server = server;
2514
Trond Myklebust788e7a82006-03-20 13:44:27 -05002515 rpc_call_setup(&data->task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516}
2517
2518/*
2519 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2520 * standalone procedure for queueing an asynchronous RENEW.
2521 */
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002522static void nfs4_renew_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523{
2524 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002525 unsigned long timestamp = (unsigned long)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526
2527 if (task->tk_status < 0) {
2528 switch (task->tk_status) {
2529 case -NFS4ERR_STALE_CLIENTID:
2530 case -NFS4ERR_EXPIRED:
2531 case -NFS4ERR_CB_PATH_DOWN:
2532 nfs4_schedule_state_recovery(clp);
2533 }
2534 return;
2535 }
2536 spin_lock(&clp->cl_lock);
2537 if (time_before(clp->cl_last_renewal,timestamp))
2538 clp->cl_last_renewal = timestamp;
2539 spin_unlock(&clp->cl_lock);
2540}
2541
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002542static const struct rpc_call_ops nfs4_renew_ops = {
2543 .rpc_call_done = nfs4_renew_done,
2544};
2545
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002546int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547{
2548 struct rpc_message msg = {
2549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2550 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002551 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 };
2553
2554 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002555 &nfs4_renew_ops, (void *)jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556}
2557
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002558int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559{
2560 struct rpc_message msg = {
2561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2562 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002563 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564 };
2565 unsigned long now = jiffies;
2566 int status;
2567
2568 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2569 if (status < 0)
2570 return status;
2571 spin_lock(&clp->cl_lock);
2572 if (time_before(clp->cl_last_renewal,now))
2573 clp->cl_last_renewal = now;
2574 spin_unlock(&clp->cl_lock);
2575 return 0;
2576}
2577
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002578static inline int nfs4_server_supports_acls(struct nfs_server *server)
2579{
2580 return (server->caps & NFS_CAP_ACLS)
2581 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2582 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2583}
2584
2585/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2586 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2587 * the stack.
2588 */
2589#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2590
2591static void buf_to_pages(const void *buf, size_t buflen,
2592 struct page **pages, unsigned int *pgbase)
2593{
2594 const void *p = buf;
2595
2596 *pgbase = offset_in_page(buf);
2597 p -= *pgbase;
2598 while (p < buf + buflen) {
2599 *(pages++) = virt_to_page(p);
2600 p += PAGE_CACHE_SIZE;
2601 }
2602}
2603
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002604struct nfs4_cached_acl {
2605 int cached;
2606 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00002607 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002608};
2609
2610static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002611{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002612 struct nfs_inode *nfsi = NFS_I(inode);
2613
2614 spin_lock(&inode->i_lock);
2615 kfree(nfsi->nfs4_acl);
2616 nfsi->nfs4_acl = acl;
2617 spin_unlock(&inode->i_lock);
2618}
2619
2620static void nfs4_zap_acl_attr(struct inode *inode)
2621{
2622 nfs4_set_cached_acl(inode, NULL);
2623}
2624
2625static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2626{
2627 struct nfs_inode *nfsi = NFS_I(inode);
2628 struct nfs4_cached_acl *acl;
2629 int ret = -ENOENT;
2630
2631 spin_lock(&inode->i_lock);
2632 acl = nfsi->nfs4_acl;
2633 if (acl == NULL)
2634 goto out;
2635 if (buf == NULL) /* user is just asking for length */
2636 goto out_len;
2637 if (acl->cached == 0)
2638 goto out;
2639 ret = -ERANGE; /* see getxattr(2) man page */
2640 if (acl->len > buflen)
2641 goto out;
2642 memcpy(buf, acl->data, acl->len);
2643out_len:
2644 ret = acl->len;
2645out:
2646 spin_unlock(&inode->i_lock);
2647 return ret;
2648}
2649
2650static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2651{
2652 struct nfs4_cached_acl *acl;
2653
2654 if (buf && acl_len <= PAGE_SIZE) {
2655 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2656 if (acl == NULL)
2657 goto out;
2658 acl->cached = 1;
2659 memcpy(acl->data, buf, acl_len);
2660 } else {
2661 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2662 if (acl == NULL)
2663 goto out;
2664 acl->cached = 0;
2665 }
2666 acl->len = acl_len;
2667out:
2668 nfs4_set_cached_acl(inode, acl);
2669}
2670
2671static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2672{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002673 struct page *pages[NFS4ACL_MAXPAGES];
2674 struct nfs_getaclargs args = {
2675 .fh = NFS_FH(inode),
2676 .acl_pages = pages,
2677 .acl_len = buflen,
2678 };
2679 size_t resp_len = buflen;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002680 void *resp_buf;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002681 struct rpc_message msg = {
2682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2683 .rpc_argp = &args,
2684 .rpc_resp = &resp_len,
2685 };
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002686 struct page *localpage = NULL;
2687 int ret;
2688
2689 if (buflen < PAGE_SIZE) {
2690 /* As long as we're doing a round trip to the server anyway,
2691 * let's be prepared for a page of acl data. */
2692 localpage = alloc_page(GFP_KERNEL);
2693 resp_buf = page_address(localpage);
2694 if (localpage == NULL)
2695 return -ENOMEM;
2696 args.acl_pages[0] = localpage;
2697 args.acl_pgbase = 0;
J. Bruce Fields1d95db82005-10-13 16:54:32 -04002698 resp_len = args.acl_len = PAGE_SIZE;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002699 } else {
2700 resp_buf = buf;
2701 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2702 }
2703 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2704 if (ret)
2705 goto out_free;
2706 if (resp_len > args.acl_len)
2707 nfs4_write_cached_acl(inode, NULL, resp_len);
2708 else
2709 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2710 if (buf) {
2711 ret = -ERANGE;
2712 if (resp_len > buflen)
2713 goto out_free;
2714 if (localpage)
2715 memcpy(buf, resp_buf, resp_len);
2716 }
2717 ret = resp_len;
2718out_free:
2719 if (localpage)
2720 __free_page(localpage);
2721 return ret;
2722}
2723
2724static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2725{
2726 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002727 int ret;
2728
2729 if (!nfs4_server_supports_acls(server))
2730 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002731 ret = nfs_revalidate_inode(server, inode);
2732 if (ret < 0)
2733 return ret;
2734 ret = nfs4_read_cached_acl(inode, buf, buflen);
2735 if (ret != -ENOENT)
2736 return ret;
2737 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002738}
2739
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002740static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2741{
2742 struct nfs_server *server = NFS_SERVER(inode);
2743 struct page *pages[NFS4ACL_MAXPAGES];
2744 struct nfs_setaclargs arg = {
2745 .fh = NFS_FH(inode),
2746 .acl_pages = pages,
2747 .acl_len = buflen,
2748 };
2749 struct rpc_message msg = {
2750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2751 .rpc_argp = &arg,
2752 .rpc_resp = NULL,
2753 };
2754 int ret;
2755
2756 if (!nfs4_server_supports_acls(server))
2757 return -EOPNOTSUPP;
Trond Myklebust642ac542005-10-18 14:20:19 -07002758 nfs_inode_return_delegation(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002759 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2760 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002761 if (ret == 0)
2762 nfs4_write_cached_acl(inode, buf, buflen);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002763 return ret;
2764}
2765
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766static int
Trond Myklebustfaf5f492005-10-18 14:20:15 -07002767nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002768{
2769 struct nfs4_client *clp = server->nfs4_state;
2770
2771 if (!clp || task->tk_status >= 0)
2772 return 0;
2773 switch(task->tk_status) {
2774 case -NFS4ERR_STALE_CLIENTID:
2775 case -NFS4ERR_STALE_STATEID:
2776 case -NFS4ERR_EXPIRED:
2777 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2778 nfs4_schedule_state_recovery(clp);
Trond Myklebust433fbe42006-01-03 09:55:22 +01002779 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780 rpc_wake_up_task(task);
2781 task->tk_status = 0;
2782 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 case -NFS4ERR_DELAY:
Chuck Lever006ea732006-03-20 13:44:14 -05002784 nfs_inc_server_stats((struct nfs_server *) server,
2785 NFSIOS_DELAY);
2786 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2788 task->tk_status = 0;
2789 return -EAGAIN;
2790 case -NFS4ERR_OLD_STATEID:
2791 task->tk_status = 0;
2792 return -EAGAIN;
2793 }
2794 task->tk_status = nfs4_map_errors(task->tk_status);
2795 return 0;
2796}
2797
Trond Myklebust433fbe42006-01-03 09:55:22 +01002798static int nfs4_wait_bit_interruptible(void *word)
2799{
2800 if (signal_pending(current))
2801 return -ERESTARTSYS;
2802 schedule();
2803 return 0;
2804}
2805
Linus Torvalds1da177e2005-04-16 15:20:36 -07002806static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2807{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002808 sigset_t oldset;
Trond Myklebust433fbe42006-01-03 09:55:22 +01002809 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002810
2811 might_sleep();
2812
2813 rpc_clnt_sigmask(clnt, &oldset);
Trond Myklebust433fbe42006-01-03 09:55:22 +01002814 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2815 nfs4_wait_bit_interruptible,
2816 TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002817 rpc_clnt_sigunmask(clnt, &oldset);
2818 return res;
2819}
2820
2821static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2822{
2823 sigset_t oldset;
2824 int res = 0;
2825
2826 might_sleep();
2827
2828 if (*timeout <= 0)
2829 *timeout = NFS4_POLL_RETRY_MIN;
2830 if (*timeout > NFS4_POLL_RETRY_MAX)
2831 *timeout = NFS4_POLL_RETRY_MAX;
2832 rpc_clnt_sigmask(clnt, &oldset);
2833 if (clnt->cl_intr) {
Nishanth Aravamudan041e0e32005-09-10 00:27:23 -07002834 schedule_timeout_interruptible(*timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835 if (signalled())
2836 res = -ERESTARTSYS;
Nishanth Aravamudan041e0e32005-09-10 00:27:23 -07002837 } else
2838 schedule_timeout_uninterruptible(*timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 rpc_clnt_sigunmask(clnt, &oldset);
2840 *timeout <<= 1;
2841 return res;
2842}
2843
2844/* This is the error handling routine for processes that are allowed
2845 * to sleep.
2846 */
Trond Myklebustfaf5f492005-10-18 14:20:15 -07002847int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848{
2849 struct nfs4_client *clp = server->nfs4_state;
2850 int ret = errorcode;
2851
2852 exception->retry = 0;
2853 switch(errorcode) {
2854 case 0:
2855 return 0;
2856 case -NFS4ERR_STALE_CLIENTID:
2857 case -NFS4ERR_STALE_STATEID:
2858 case -NFS4ERR_EXPIRED:
Trond Myklebust433fbe42006-01-03 09:55:22 +01002859 nfs4_schedule_state_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860 ret = nfs4_wait_clnt_recover(server->client, clp);
2861 if (ret == 0)
2862 exception->retry = 1;
2863 break;
2864 case -NFS4ERR_GRACE:
2865 case -NFS4ERR_DELAY:
2866 ret = nfs4_delay(server->client, &exception->timeout);
Trond Myklebust2c566172005-11-04 15:33:50 -05002867 if (ret != 0)
2868 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002869 case -NFS4ERR_OLD_STATEID:
Trond Myklebust2c566172005-11-04 15:33:50 -05002870 exception->retry = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002871 }
2872 /* We failed to handle the error */
2873 return nfs4_map_errors(ret);
2874}
2875
Trond Myklebust286d7d62006-01-03 09:55:26 +01002876int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877{
2878 nfs4_verifier sc_verifier;
2879 struct nfs4_setclientid setclientid = {
2880 .sc_verifier = &sc_verifier,
2881 .sc_prog = program,
2882 };
2883 struct rpc_message msg = {
2884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2885 .rpc_argp = &setclientid,
2886 .rpc_resp = clp,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002887 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002888 };
2889 u32 *p;
2890 int loop = 0;
2891 int status;
2892
2893 p = (u32*)sc_verifier.data;
2894 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2895 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2896
2897 for(;;) {
2898 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2899 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2900 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
Trond Myklebust286d7d62006-01-03 09:55:26 +01002901 cred->cr_ops->cr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002902 clp->cl_id_uniquifier);
2903 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2904 sizeof(setclientid.sc_netid), "tcp");
2905 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2906 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2907 clp->cl_ipaddr, port >> 8, port & 255);
2908
2909 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2910 if (status != -NFS4ERR_CLID_INUSE)
2911 break;
2912 if (signalled())
2913 break;
2914 if (loop++ & 1)
2915 ssleep(clp->cl_lease_time + 1);
2916 else
2917 if (++clp->cl_id_uniquifier == 0)
2918 break;
2919 }
2920 return status;
2921}
2922
Trond Myklebust51581f32006-03-20 13:44:47 -05002923static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002924{
2925 struct nfs_fsinfo fsinfo;
2926 struct rpc_message msg = {
2927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2928 .rpc_argp = clp,
2929 .rpc_resp = &fsinfo,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002930 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 };
2932 unsigned long now;
2933 int status;
2934
2935 now = jiffies;
2936 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2937 if (status == 0) {
2938 spin_lock(&clp->cl_lock);
2939 clp->cl_lease_time = fsinfo.lease_time * HZ;
2940 clp->cl_last_renewal = now;
Trond Myklebust58d97142006-01-03 09:55:24 +01002941 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942 spin_unlock(&clp->cl_lock);
2943 }
2944 return status;
2945}
2946
Trond Myklebust51581f32006-03-20 13:44:47 -05002947int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
2948{
2949 long timeout;
2950 int err;
2951 do {
2952 err = _nfs4_proc_setclientid_confirm(clp, cred);
2953 switch (err) {
2954 case 0:
2955 return err;
2956 case -NFS4ERR_RESOURCE:
2957 /* The IBM lawyers misread another document! */
2958 case -NFS4ERR_DELAY:
2959 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2960 }
2961 } while (err == 0);
2962 return err;
2963}
2964
Trond Myklebustfe650402006-01-03 09:55:18 +01002965struct nfs4_delegreturndata {
2966 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002967 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01002968 struct nfs_fh fh;
2969 nfs4_stateid stateid;
2970 struct rpc_cred *cred;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002971 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002972 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01002973 int rpc_status;
2974};
2975
2976static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977{
Trond Myklebustfe650402006-01-03 09:55:18 +01002978 struct nfs4_delegreturndata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002979 struct rpc_message msg = {
2980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
Trond Myklebustfe650402006-01-03 09:55:18 +01002981 .rpc_argp = &data->args,
Trond Myklebustfa178f22006-01-03 09:55:38 +01002982 .rpc_resp = &data->res,
Trond Myklebustfe650402006-01-03 09:55:18 +01002983 .rpc_cred = data->cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002984 };
Trond Myklebustfa178f22006-01-03 09:55:38 +01002985 nfs_fattr_init(data->res.fattr);
Trond Myklebustfe650402006-01-03 09:55:18 +01002986 rpc_call_setup(task, &msg, 0);
2987}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002988
Trond Myklebustfe650402006-01-03 09:55:18 +01002989static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2990{
2991 struct nfs4_delegreturndata *data = calldata;
2992 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002993 if (data->rpc_status == 0)
Trond Myklebustfa178f22006-01-03 09:55:38 +01002994 renew_lease(data->res.server, data->timestamp);
Trond Myklebustfe650402006-01-03 09:55:18 +01002995}
2996
2997static void nfs4_delegreturn_release(void *calldata)
2998{
2999 struct nfs4_delegreturndata *data = calldata;
3000
3001 put_rpccred(data->cred);
3002 kfree(calldata);
3003}
3004
Jesper Juhlc8d149f2006-03-20 13:44:07 -05003005static const struct rpc_call_ops nfs4_delegreturn_ops = {
Trond Myklebustfe650402006-01-03 09:55:18 +01003006 .rpc_call_prepare = nfs4_delegreturn_prepare,
3007 .rpc_call_done = nfs4_delegreturn_done,
3008 .rpc_release = nfs4_delegreturn_release,
3009};
3010
3011static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3012{
3013 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01003014 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01003015 struct rpc_task *task;
3016 int status;
3017
3018 data = kmalloc(sizeof(*data), GFP_KERNEL);
3019 if (data == NULL)
3020 return -ENOMEM;
3021 data->args.fhandle = &data->fh;
3022 data->args.stateid = &data->stateid;
Trond Myklebustfa178f22006-01-03 09:55:38 +01003023 data->args.bitmask = server->attr_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01003024 nfs_copy_fh(&data->fh, NFS_FH(inode));
3025 memcpy(&data->stateid, stateid, sizeof(data->stateid));
Trond Myklebustfa178f22006-01-03 09:55:38 +01003026 data->res.fattr = &data->fattr;
3027 data->res.server = server;
Trond Myklebustfe650402006-01-03 09:55:18 +01003028 data->cred = get_rpccred(cred);
Trond Myklebust26e976a2006-01-03 09:55:21 +01003029 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01003030 data->rpc_status = 0;
3031
3032 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003033 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01003034 return PTR_ERR(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01003035 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebustfa178f22006-01-03 09:55:38 +01003036 if (status == 0) {
Trond Myklebustfe650402006-01-03 09:55:18 +01003037 status = data->rpc_status;
Trond Myklebustfa178f22006-01-03 09:55:38 +01003038 if (status == 0)
3039 nfs_post_op_update_inode(inode, &data->fattr);
3040 }
Trond Myklebustfe650402006-01-03 09:55:18 +01003041 rpc_release_task(task);
3042 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043}
3044
3045int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3046{
3047 struct nfs_server *server = NFS_SERVER(inode);
3048 struct nfs4_exception exception = { };
3049 int err;
3050 do {
3051 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3052 switch (err) {
3053 case -NFS4ERR_STALE_STATEID:
3054 case -NFS4ERR_EXPIRED:
3055 nfs4_schedule_state_recovery(server->nfs4_state);
3056 case 0:
3057 return 0;
3058 }
3059 err = nfs4_handle_exception(server, err, &exception);
3060 } while (exception.retry);
3061 return err;
3062}
3063
3064#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3065#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3066
3067/*
3068 * sleep, with exponential backoff, and retry the LOCK operation.
3069 */
3070static unsigned long
3071nfs4_set_lock_task_retry(unsigned long timeout)
3072{
Nishanth Aravamudan041e0e32005-09-10 00:27:23 -07003073 schedule_timeout_interruptible(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003074 timeout <<= 1;
3075 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3076 return NFS4_LOCK_MAXTIMEOUT;
3077 return timeout;
3078}
3079
Linus Torvalds1da177e2005-04-16 15:20:36 -07003080static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3081{
3082 struct inode *inode = state->inode;
3083 struct nfs_server *server = NFS_SERVER(inode);
3084 struct nfs4_client *clp = server->nfs4_state;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003085 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003087 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003089 struct nfs_lockt_res res = {
3090 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003091 };
3092 struct rpc_message msg = {
3093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3094 .rpc_argp = &arg,
3095 .rpc_resp = &res,
3096 .rpc_cred = state->owner->so_cred,
3097 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003098 struct nfs4_lock_state *lsp;
3099 int status;
3100
3101 down_read(&clp->cl_sem);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003102 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003103 status = nfs4_set_lock_state(state, request);
3104 if (status != 0)
3105 goto out;
3106 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003107 arg.lock_owner.id = lsp->ls_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003109 switch (status) {
3110 case 0:
3111 request->fl_type = F_UNLCK;
3112 break;
3113 case -NFS4ERR_DENIED:
3114 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115 }
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003116out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003117 up_read(&clp->cl_sem);
3118 return status;
3119}
3120
3121static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3122{
3123 struct nfs4_exception exception = { };
3124 int err;
3125
3126 do {
3127 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3128 _nfs4_proc_getlk(state, cmd, request),
3129 &exception);
3130 } while (exception.retry);
3131 return err;
3132}
3133
3134static int do_vfs_lock(struct file *file, struct file_lock *fl)
3135{
3136 int res = 0;
3137 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3138 case FL_POSIX:
3139 res = posix_lock_file_wait(file, fl);
3140 break;
3141 case FL_FLOCK:
3142 res = flock_lock_file_wait(file, fl);
3143 break;
3144 default:
3145 BUG();
3146 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003147 return res;
3148}
3149
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003150struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003151 struct nfs_locku_args arg;
3152 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003153 struct nfs4_lock_state *lsp;
3154 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003155 struct file_lock fl;
3156 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003157 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003158};
3159
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003160static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3161 struct nfs_open_context *ctx,
3162 struct nfs4_lock_state *lsp,
3163 struct nfs_seqid *seqid)
3164{
3165 struct nfs4_unlockdata *p;
3166 struct inode *inode = lsp->ls_state->inode;
3167
3168 p = kmalloc(sizeof(*p), GFP_KERNEL);
3169 if (p == NULL)
3170 return NULL;
3171 p->arg.fh = NFS_FH(inode);
3172 p->arg.fl = &p->fl;
3173 p->arg.seqid = seqid;
3174 p->arg.stateid = &lsp->ls_stateid;
3175 p->lsp = lsp;
3176 atomic_inc(&lsp->ls_count);
3177 /* Ensure we don't close file until we're done freeing locks! */
3178 p->ctx = get_nfs_open_context(ctx);
3179 memcpy(&p->fl, fl, sizeof(p->fl));
3180 p->server = NFS_SERVER(inode);
3181 return p;
3182}
3183
Trond Myklebust06f814a2006-01-03 09:55:07 +01003184static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003185{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003186 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003187 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01003188 nfs4_put_lock_state(calldata->lsp);
3189 put_nfs_open_context(calldata->ctx);
3190 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003191}
3192
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003193static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003194{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003195 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003196
Trond Myklebust06f814a2006-01-03 09:55:07 +01003197 if (RPC_ASSASSINATED(task))
3198 return;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003199 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003200 switch (task->tk_status) {
3201 case 0:
3202 memcpy(calldata->lsp->ls_stateid.data,
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003203 calldata->res.stateid.data,
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003204 sizeof(calldata->lsp->ls_stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +01003205 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003206 break;
3207 case -NFS4ERR_STALE_STATEID:
3208 case -NFS4ERR_EXPIRED:
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003209 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003210 break;
3211 default:
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003212 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003213 rpc_restart_call(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003214 }
3215 }
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003216}
3217
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003218static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003219{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003220 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003221 struct rpc_message msg = {
3222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003223 .rpc_argp = &calldata->arg,
3224 .rpc_resp = &calldata->res,
3225 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003227
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003228 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003229 return;
3230 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003231 /* Note: exit _without_ running nfs4_locku_done */
3232 task->tk_action = NULL;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003233 return;
3234 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003235 calldata->timestamp = jiffies;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003236 rpc_call_setup(task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003237}
3238
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003239static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003240 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003241 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01003242 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003243};
3244
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003245static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3246 struct nfs_open_context *ctx,
3247 struct nfs4_lock_state *lsp,
3248 struct nfs_seqid *seqid)
3249{
3250 struct nfs4_unlockdata *data;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003251
3252 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3253 if (data == NULL) {
3254 nfs_free_seqid(seqid);
3255 return ERR_PTR(-ENOMEM);
3256 }
3257
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003258 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003259}
3260
Linus Torvalds1da177e2005-04-16 15:20:36 -07003261static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3262{
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003263 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003264 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01003265 struct rpc_task *task;
3266 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003267
Trond Myklebust9b073572006-06-29 16:38:34 -04003268 status = nfs4_set_lock_state(state, request);
3269 /* Unlock _before_ we do the RPC call */
3270 request->fl_flags |= FL_EXISTS;
3271 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3272 goto out;
3273 if (status != 0)
3274 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003275 /* Is this a delegated lock? */
3276 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust9b073572006-06-29 16:38:34 -04003277 goto out;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003278 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003279 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
Trond Myklebust9b073572006-06-29 16:38:34 -04003280 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003281 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04003282 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003283 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3284 status = PTR_ERR(task);
3285 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04003286 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003287 status = nfs4_wait_for_completion_rpc_task(task);
3288 rpc_release_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04003289out:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003290 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003291}
3292
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003293struct nfs4_lockdata {
3294 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003295 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003296 struct nfs4_lock_state *lsp;
3297 struct nfs_open_context *ctx;
3298 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003299 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003300 int rpc_status;
3301 int cancelled;
3302};
3303
3304static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3305 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3306{
3307 struct nfs4_lockdata *p;
3308 struct inode *inode = lsp->ls_state->inode;
3309 struct nfs_server *server = NFS_SERVER(inode);
3310
3311 p = kzalloc(sizeof(*p), GFP_KERNEL);
3312 if (p == NULL)
3313 return NULL;
3314
3315 p->arg.fh = NFS_FH(inode);
3316 p->arg.fl = &p->fl;
3317 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3318 if (p->arg.lock_seqid == NULL)
3319 goto out_free;
3320 p->arg.lock_stateid = &lsp->ls_stateid;
3321 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3322 p->arg.lock_owner.id = lsp->ls_id;
3323 p->lsp = lsp;
3324 atomic_inc(&lsp->ls_count);
3325 p->ctx = get_nfs_open_context(ctx);
3326 memcpy(&p->fl, fl, sizeof(p->fl));
3327 return p;
3328out_free:
3329 kfree(p);
3330 return NULL;
3331}
3332
3333static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3334{
3335 struct nfs4_lockdata *data = calldata;
3336 struct nfs4_state *state = data->lsp->ls_state;
3337 struct nfs4_state_owner *sp = state->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003338 struct rpc_message msg = {
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3340 .rpc_argp = &data->arg,
3341 .rpc_resp = &data->res,
3342 .rpc_cred = sp->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003343 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003344
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003345 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3346 return;
3347 dprintk("%s: begin!\n", __FUNCTION__);
3348 /* Do we need to do an open_to_lock_owner? */
3349 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3350 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3351 if (data->arg.open_seqid == NULL) {
3352 data->rpc_status = -ENOMEM;
3353 task->tk_action = NULL;
Trond Myklebust06735b32005-10-18 14:20:15 -07003354 goto out;
Trond Myklebust06735b32005-10-18 14:20:15 -07003355 }
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003356 data->arg.open_stateid = &state->stateid;
3357 data->arg.new_lock_owner = 1;
3358 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003359 data->timestamp = jiffies;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003360 rpc_call_setup(task, &msg, 0);
Trond Myklebust06735b32005-10-18 14:20:15 -07003361out:
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003362 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3363}
3364
3365static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3366{
3367 struct nfs4_lockdata *data = calldata;
3368
3369 dprintk("%s: begin!\n", __FUNCTION__);
3370
3371 data->rpc_status = task->tk_status;
3372 if (RPC_ASSASSINATED(task))
3373 goto out;
3374 if (data->arg.new_lock_owner != 0) {
3375 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3376 if (data->rpc_status == 0)
3377 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3378 else
3379 goto out;
3380 }
3381 if (data->rpc_status == 0) {
3382 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3383 sizeof(data->lsp->ls_stateid.data));
3384 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003385 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003386 }
3387 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3388out:
3389 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3390}
3391
3392static void nfs4_lock_release(void *calldata)
3393{
3394 struct nfs4_lockdata *data = calldata;
3395
3396 dprintk("%s: begin!\n", __FUNCTION__);
3397 if (data->arg.open_seqid != NULL)
3398 nfs_free_seqid(data->arg.open_seqid);
3399 if (data->cancelled != 0) {
3400 struct rpc_task *task;
3401 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3402 data->arg.lock_seqid);
3403 if (!IS_ERR(task))
3404 rpc_release_task(task);
3405 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3406 } else
3407 nfs_free_seqid(data->arg.lock_seqid);
3408 nfs4_put_lock_state(data->lsp);
3409 put_nfs_open_context(data->ctx);
3410 kfree(data);
3411 dprintk("%s: done!\n", __FUNCTION__);
3412}
3413
3414static const struct rpc_call_ops nfs4_lock_ops = {
3415 .rpc_call_prepare = nfs4_lock_prepare,
3416 .rpc_call_done = nfs4_lock_done,
3417 .rpc_release = nfs4_lock_release,
3418};
3419
3420static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3421{
3422 struct nfs4_lockdata *data;
3423 struct rpc_task *task;
3424 int ret;
3425
3426 dprintk("%s: begin!\n", __FUNCTION__);
3427 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3428 fl->fl_u.nfs4_fl.owner);
3429 if (data == NULL)
3430 return -ENOMEM;
3431 if (IS_SETLKW(cmd))
3432 data->arg.block = 1;
3433 if (reclaim != 0)
3434 data->arg.reclaim = 1;
3435 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3436 &nfs4_lock_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003437 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003438 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003439 ret = nfs4_wait_for_completion_rpc_task(task);
3440 if (ret == 0) {
3441 ret = data->rpc_status;
3442 if (ret == -NFS4ERR_DENIED)
3443 ret = -EAGAIN;
3444 } else
3445 data->cancelled = 1;
3446 rpc_release_task(task);
3447 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3448 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003449}
3450
3451static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3452{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003453 struct nfs_server *server = NFS_SERVER(state->inode);
3454 struct nfs4_exception exception = { };
3455 int err;
3456
3457 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003458 /* Cache the lock if possible... */
3459 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3460 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003461 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3462 if (err != -NFS4ERR_DELAY)
3463 break;
3464 nfs4_handle_exception(server, err, &exception);
3465 } while (exception.retry);
3466 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003467}
3468
3469static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3470{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003471 struct nfs_server *server = NFS_SERVER(state->inode);
3472 struct nfs4_exception exception = { };
3473 int err;
3474
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003475 err = nfs4_set_lock_state(state, request);
3476 if (err != 0)
3477 return err;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003478 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003479 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3480 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003481 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3482 if (err != -NFS4ERR_DELAY)
3483 break;
3484 nfs4_handle_exception(server, err, &exception);
3485 } while (exception.retry);
3486 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003487}
3488
3489static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3490{
3491 struct nfs4_client *clp = state->owner->so_client;
3492 int status;
3493
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003494 /* Is this a delegated open? */
Trond Myklebustff604062005-11-25 17:10:01 -05003495 if (NFS_I(state->inode)->delegation_state != 0) {
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003496 /* Yes: cache locks! */
3497 status = do_vfs_lock(request->fl_file, request);
3498 /* ...but avoid races with delegation recall... */
3499 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebustff604062005-11-25 17:10:01 -05003500 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003501 }
Trond Myklebustff604062005-11-25 17:10:01 -05003502 down_read(&clp->cl_sem);
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003503 status = nfs4_set_lock_state(state, request);
3504 if (status != 0)
3505 goto out;
3506 status = _nfs4_do_setlk(state, cmd, request, 0);
3507 if (status != 0)
3508 goto out;
3509 /* Note: we always want to sleep here! */
3510 request->fl_flags |= FL_SLEEP;
3511 if (do_vfs_lock(request->fl_file, request) < 0)
3512 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3513out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514 up_read(&clp->cl_sem);
3515 return status;
3516}
3517
3518static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3519{
3520 struct nfs4_exception exception = { };
3521 int err;
3522
3523 do {
3524 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3525 _nfs4_proc_setlk(state, cmd, request),
3526 &exception);
3527 } while (exception.retry);
3528 return err;
3529}
3530
3531static int
3532nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3533{
3534 struct nfs_open_context *ctx;
3535 struct nfs4_state *state;
3536 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3537 int status;
3538
3539 /* verify open state */
3540 ctx = (struct nfs_open_context *)filp->private_data;
3541 state = ctx->state;
3542
3543 if (request->fl_start < 0 || request->fl_end < 0)
3544 return -EINVAL;
3545
3546 if (IS_GETLK(cmd))
3547 return nfs4_proc_getlk(state, F_GETLK, request);
3548
3549 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3550 return -EINVAL;
3551
3552 if (request->fl_type == F_UNLCK)
3553 return nfs4_proc_unlck(state, cmd, request);
3554
3555 do {
3556 status = nfs4_proc_setlk(state, cmd, request);
3557 if ((status != -EAGAIN) || IS_SETLK(cmd))
3558 break;
3559 timeout = nfs4_set_lock_task_retry(timeout);
3560 status = -ERESTARTSYS;
3561 if (signalled())
3562 break;
3563 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003564 return status;
3565}
3566
Trond Myklebust888e6942005-11-04 15:38:11 -05003567int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3568{
3569 struct nfs_server *server = NFS_SERVER(state->inode);
3570 struct nfs4_exception exception = { };
3571 int err;
3572
3573 err = nfs4_set_lock_state(state, fl);
3574 if (err != 0)
3575 goto out;
3576 do {
3577 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3578 if (err != -NFS4ERR_DELAY)
3579 break;
3580 err = nfs4_handle_exception(server, err, &exception);
3581 } while (exception.retry);
3582out:
3583 return err;
3584}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003585
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003586#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3587
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003588int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3589 size_t buflen, int flags)
3590{
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003591 struct inode *inode = dentry->d_inode;
3592
3593 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3594 return -EOPNOTSUPP;
3595
3596 if (!S_ISREG(inode->i_mode) &&
3597 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3598 return -EPERM;
3599
3600 return nfs4_proc_set_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003601}
3602
3603/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3604 * and that's what we'll do for e.g. user attributes that haven't been set.
3605 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3606 * attributes in kernel-managed attribute namespaces. */
3607ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3608 size_t buflen)
3609{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003610 struct inode *inode = dentry->d_inode;
3611
3612 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3613 return -EOPNOTSUPP;
3614
3615 return nfs4_proc_get_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003616}
3617
3618ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3619{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003620 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003621
J. Bruce Fields096455a2006-03-20 23:23:42 -05003622 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3623 return 0;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003624 if (buf && buflen < len)
3625 return -ERANGE;
3626 if (buf)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003627 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3628 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003629}
3630
Trond Myklebust683b57b2006-06-09 09:34:22 -04003631int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003632 struct nfs4_fs_locations *fs_locations, struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04003633{
3634 struct nfs_server *server = NFS_SERVER(dir);
3635 u32 bitmask[2] = {
Manoj Naik361e6242006-06-09 09:34:24 -04003636 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3637 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003638 };
3639 struct nfs4_fs_locations_arg args = {
3640 .dir_fh = NFS_FH(dir),
3641 .name = &dentry->d_name,
3642 .page = page,
3643 .bitmask = bitmask,
3644 };
3645 struct rpc_message msg = {
3646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3647 .rpc_argp = &args,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003648 .rpc_resp = fs_locations,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003649 };
3650 int status;
3651
3652 dprintk("%s: start\n", __FUNCTION__);
3653 fs_locations->fattr.valid = 0;
3654 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04003655 fs_locations->nlocations = 0;
Trond Myklebust683b57b2006-06-09 09:34:22 -04003656 status = rpc_call_sync(server->client, &msg, 0);
3657 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3658 return status;
3659}
3660
Linus Torvalds1da177e2005-04-16 15:20:36 -07003661struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3662 .recover_open = nfs4_open_reclaim,
3663 .recover_lock = nfs4_lock_reclaim,
3664};
3665
3666struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3667 .recover_open = nfs4_open_expired,
3668 .recover_lock = nfs4_lock_expired,
3669};
3670
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003671static struct inode_operations nfs4_file_inode_operations = {
3672 .permission = nfs_permission,
3673 .getattr = nfs_getattr,
3674 .setattr = nfs_setattr,
3675 .getxattr = nfs4_getxattr,
3676 .setxattr = nfs4_setxattr,
3677 .listxattr = nfs4_listxattr,
3678};
3679
Linus Torvalds1da177e2005-04-16 15:20:36 -07003680struct nfs_rpc_ops nfs_v4_clientops = {
3681 .version = 4, /* protocol version */
3682 .dentry_ops = &nfs4_dentry_operations,
3683 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003684 .file_inode_ops = &nfs4_file_inode_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003685 .getroot = nfs4_proc_get_root,
3686 .getattr = nfs4_proc_getattr,
3687 .setattr = nfs4_proc_setattr,
3688 .lookup = nfs4_proc_lookup,
3689 .access = nfs4_proc_access,
3690 .readlink = nfs4_proc_readlink,
3691 .read = nfs4_proc_read,
3692 .write = nfs4_proc_write,
3693 .commit = nfs4_proc_commit,
3694 .create = nfs4_proc_create,
3695 .remove = nfs4_proc_remove,
3696 .unlink_setup = nfs4_proc_unlink_setup,
3697 .unlink_done = nfs4_proc_unlink_done,
3698 .rename = nfs4_proc_rename,
3699 .link = nfs4_proc_link,
3700 .symlink = nfs4_proc_symlink,
3701 .mkdir = nfs4_proc_mkdir,
3702 .rmdir = nfs4_proc_remove,
3703 .readdir = nfs4_proc_readdir,
3704 .mknod = nfs4_proc_mknod,
3705 .statfs = nfs4_proc_statfs,
3706 .fsinfo = nfs4_proc_fsinfo,
3707 .pathconf = nfs4_proc_pathconf,
3708 .decode_dirent = nfs4_decode_dirent,
3709 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05003710 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003712 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003713 .commit_setup = nfs4_proc_commit_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003714 .commit_done = nfs4_commit_done,
Trond Myklebust02a913a2005-10-18 14:20:17 -07003715 .file_open = nfs_open,
3716 .file_release = nfs_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003717 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00003718 .clear_acl_cache = nfs4_zap_acl_attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719};
3720
3721/*
3722 * Local variables:
3723 * c-basic-offset: 8
3724 * End:
3725 */