blob: 7ce07862c2fbcd825f03a2041675e6ae66b43b7a [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
Trond Myklebust2066fe82006-09-15 08:30:46 -040058#define NFS4_POLL_RETRY_MIN (HZ/10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#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 *);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070065static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
David Howellsadfa6f92006-08-22 20:06:08 -040066static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
Trond Myklebust99367812007-07-17 21:52:41 -040067static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
68static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Linus Torvalds1da177e2005-04-16 15:20:36 -070070/* Prevent leaks of NFSv4 errors into userland */
71int nfs4_map_errors(int err)
72{
73 if (err < -1000) {
74 dprintk("%s could not handle NFSv4 error %d\n",
75 __FUNCTION__, -err);
76 return -EIO;
77 }
78 return err;
79}
80
81/*
82 * This is our standard bitmap for GETATTR requests.
83 */
84const u32 nfs4_fattr_bitmap[2] = {
85 FATTR4_WORD0_TYPE
86 | FATTR4_WORD0_CHANGE
87 | FATTR4_WORD0_SIZE
88 | FATTR4_WORD0_FSID
89 | FATTR4_WORD0_FILEID,
90 FATTR4_WORD1_MODE
91 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER
93 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_RAWDEV
95 | FATTR4_WORD1_SPACE_USED
96 | FATTR4_WORD1_TIME_ACCESS
97 | FATTR4_WORD1_TIME_METADATA
98 | FATTR4_WORD1_TIME_MODIFY
99};
100
101const u32 nfs4_statfs_bitmap[2] = {
102 FATTR4_WORD0_FILES_AVAIL
103 | FATTR4_WORD0_FILES_FREE
104 | FATTR4_WORD0_FILES_TOTAL,
105 FATTR4_WORD1_SPACE_AVAIL
106 | FATTR4_WORD1_SPACE_FREE
107 | FATTR4_WORD1_SPACE_TOTAL
108};
109
Trond Myklebust4ce79712005-06-22 17:16:21 +0000110const u32 nfs4_pathconf_bitmap[2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 FATTR4_WORD0_MAXLINK
112 | FATTR4_WORD0_MAXNAME,
113 0
114};
115
116const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
117 | FATTR4_WORD0_MAXREAD
118 | FATTR4_WORD0_MAXWRITE
119 | FATTR4_WORD0_LEASE_TIME,
120 0
121};
122
Manoj Naik830b8e32006-06-09 09:34:25 -0400123const u32 nfs4_fs_locations_bitmap[2] = {
124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID
129 | FATTR4_WORD0_FS_LOCATIONS,
130 FATTR4_WORD1_MODE
131 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139 | FATTR4_WORD1_MOUNTED_ON_FILEID
140};
141
Al Virobc4785c2006-10-19 23:28:51 -0700142static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 struct nfs4_readdir_arg *readdir)
144{
Al Viro0dbb4c62006-10-19 23:28:49 -0700145 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 BUG_ON(readdir->count < 80);
148 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000149 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
151 return;
152 }
153
154 readdir->cookie = 0;
155 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
156 if (cookie == 2)
157 return;
158
159 /*
160 * NFSv4 servers do not return entries for '.' and '..'
161 * Therefore, we fake these entries here. We let '.'
162 * have cookie 0 and '..' have cookie 1. Note that
163 * when talking to the server, we always send cookie 0
164 * instead of 1 or 2.
165 */
Al Viro0dbb4c62006-10-19 23:28:49 -0700166 start = p = kmap_atomic(*readdir->pages, KM_USER0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 if (cookie == 0) {
169 *p++ = xdr_one; /* next */
170 *p++ = xdr_zero; /* cookie, first word */
171 *p++ = xdr_one; /* cookie, second word */
172 *p++ = xdr_one; /* entry len */
173 memcpy(p, ".\0\0\0", 4); /* entry */
174 p++;
175 *p++ = xdr_one; /* bitmap length */
176 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
177 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400178 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 }
180
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_two; /* cookie, second word */
184 *p++ = xdr_two; /* entry len */
185 memcpy(p, "..\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 readdir->pgbase = (char *)p - (char *)start;
193 readdir->count -= readdir->pgbase;
194 kunmap_atomic(start, KM_USER0);
195}
196
Trond Myklebust26e976a2006-01-03 09:55:21 +0100197static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
David Howells7539bba2006-08-22 20:06:09 -0400199 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 spin_lock(&clp->cl_lock);
201 if (time_before(clp->cl_last_renewal,timestamp))
202 clp->cl_last_renewal = timestamp;
203 spin_unlock(&clp->cl_lock);
204}
205
Trond Myklebust38478b22006-05-25 01:40:57 -0400206static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
Trond Myklebust38478b22006-05-25 01:40:57 -0400208 struct nfs_inode *nfsi = NFS_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Trond Myklebust38478b22006-05-25 01:40:57 -0400210 spin_lock(&dir->i_lock);
Trond Myklebust40d24702007-10-08 09:24:22 -0400211 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
212 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400213 nfs_force_lookup_revalidate(dir);
Trond Myklebust40d24702007-10-08 09:24:22 -0400214 nfsi->change_attr = cinfo->after;
Trond Myklebust38478b22006-05-25 01:40:57 -0400215 spin_unlock(&dir->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100218struct nfs4_opendata {
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400219 struct kref kref;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
Trond Myklebustad389da2007-06-05 12:30:00 -0400226 struct path path;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100227 struct dentry *dir;
228 struct nfs4_state_owner *owner;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400229 struct nfs4_state *state;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100230 struct iattr attrs;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100231 unsigned long timestamp;
Trond Myklebust3e309912007-07-07 13:19:59 -0400232 unsigned int rpc_done : 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100233 int rpc_status;
234 int cancelled;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100235};
236
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400237
238static void nfs4_init_opendata_res(struct nfs4_opendata *p)
239{
240 p->o_res.f_attr = &p->f_attr;
241 p->o_res.dir_attr = &p->dir_attr;
242 p->o_res.server = p->o_arg.server;
243 nfs_fattr_init(&p->f_attr);
244 nfs_fattr_init(&p->dir_attr);
245}
246
Trond Myklebustad389da2007-06-05 12:30:00 -0400247static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100248 struct nfs4_state_owner *sp, int flags,
249 const struct iattr *attrs)
250{
Trond Myklebustad389da2007-06-05 12:30:00 -0400251 struct dentry *parent = dget_parent(path->dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100252 struct inode *dir = parent->d_inode;
253 struct nfs_server *server = NFS_SERVER(dir);
254 struct nfs4_opendata *p;
255
256 p = kzalloc(sizeof(*p), GFP_KERNEL);
257 if (p == NULL)
258 goto err;
259 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
260 if (p->o_arg.seqid == NULL)
261 goto err_free;
Trond Myklebustad389da2007-06-05 12:30:00 -0400262 p->path.mnt = mntget(path->mnt);
263 p->path.dentry = dget(path->dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100264 p->dir = parent;
265 p->owner = sp;
266 atomic_inc(&sp->so_count);
267 p->o_arg.fh = NFS_FH(dir);
268 p->o_arg.open_flags = flags,
David Howells7539bba2006-08-22 20:06:09 -0400269 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400270 p->o_arg.id = sp->so_owner_id.id;
Trond Myklebustad389da2007-06-05 12:30:00 -0400271 p->o_arg.name = &p->path.dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100272 p->o_arg.server = server;
273 p->o_arg.bitmask = server->attr_bitmask;
274 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100275 if (flags & O_EXCL) {
276 u32 *s = (u32 *) p->o_arg.u.verifier.data;
277 s[0] = jiffies;
278 s[1] = current->pid;
279 } else if (flags & O_CREAT) {
280 p->o_arg.u.attrs = &p->attrs;
281 memcpy(&p->attrs, attrs, sizeof(p->attrs));
282 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100283 p->c_arg.fh = &p->o_res.fh;
284 p->c_arg.stateid = &p->o_res.stateid;
285 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400286 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400287 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100288 return p;
289err_free:
290 kfree(p);
291err:
292 dput(parent);
293 return NULL;
294}
295
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400296static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100297{
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400298 struct nfs4_opendata *p = container_of(kref,
299 struct nfs4_opendata, kref);
300
301 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400302 if (p->state != NULL)
303 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400304 nfs4_put_state_owner(p->owner);
305 dput(p->dir);
306 dput(p->path.dentry);
307 mntput(p->path.mnt);
308 kfree(p);
309}
310
311static void nfs4_opendata_put(struct nfs4_opendata *p)
312{
313 if (p != NULL)
314 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100315}
316
Trond Myklebust06f814a2006-01-03 09:55:07 +0100317static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
318{
Trond Myklebust06f814a2006-01-03 09:55:07 +0100319 int ret;
320
Trond Myklebust06f814a2006-01-03 09:55:07 +0100321 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +0100322 return ret;
323}
324
Trond Myklebust6ee41262007-07-08 14:11:36 -0400325static int can_open_cached(struct nfs4_state *state, int mode)
326{
327 int ret = 0;
328 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
329 case FMODE_READ:
330 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -0400331 break;
332 case FMODE_WRITE:
333 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -0400334 break;
335 case FMODE_READ|FMODE_WRITE:
336 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
337 }
338 return ret;
339}
340
Trond Myklebustaac00a82007-07-05 19:02:21 -0400341static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
342{
343 if ((delegation->type & open_flags) != open_flags)
344 return 0;
345 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
346 return 0;
347 return 1;
348}
349
Trond Myklebust003707c2007-07-05 18:07:55 -0400350static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
Trond Myklebuste7616922006-01-03 09:55:13 +0100351{
352 switch (open_flags) {
353 case FMODE_WRITE:
354 state->n_wronly++;
355 break;
356 case FMODE_READ:
357 state->n_rdonly++;
358 break;
359 case FMODE_READ|FMODE_WRITE:
360 state->n_rdwr++;
361 }
Trond Myklebust003707c2007-07-05 18:07:55 -0400362 nfs4_state_set_mode_locked(state, state->state | open_flags);
Trond Myklebuste7616922006-01-03 09:55:13 +0100363}
364
Trond Myklebust003707c2007-07-05 18:07:55 -0400365static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
366{
367 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
368 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
369 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
370 switch (open_flags) {
371 case FMODE_READ:
372 set_bit(NFS_O_RDONLY_STATE, &state->flags);
373 break;
374 case FMODE_WRITE:
375 set_bit(NFS_O_WRONLY_STATE, &state->flags);
376 break;
377 case FMODE_READ|FMODE_WRITE:
378 set_bit(NFS_O_RDWR_STATE, &state->flags);
379 }
380}
381
382static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
383{
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400384 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400385 nfs_set_open_stateid_locked(state, stateid, open_flags);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400386 write_sequnlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400387}
388
389static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 open_flags &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400392 /*
393 * Protect the call to nfs4_state_set_mode_locked and
394 * serialise the stateid update
395 */
396 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400397 if (deleg_stateid != NULL) {
398 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
399 set_bit(NFS_DELEGATED_STATE, &state->flags);
400 }
401 if (open_stateid != NULL)
402 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400403 write_sequnlock(&state->seqlock);
404 spin_lock(&state->owner->so_lock);
Trond Myklebuste7616922006-01-03 09:55:13 +0100405 update_open_stateflags(state, open_flags);
Trond Myklebustec073422005-10-20 14:22:47 -0700406 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407}
408
Trond Myklebustaac00a82007-07-05 19:02:21 -0400409static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
410{
411 struct nfs_delegation *delegation;
412
413 rcu_read_lock();
414 delegation = rcu_dereference(NFS_I(inode)->delegation);
415 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
416 rcu_read_unlock();
417 return;
418 }
419 rcu_read_unlock();
420 nfs_inode_return_delegation(inode);
421}
422
Trond Myklebust6ee41262007-07-08 14:11:36 -0400423static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -0400424{
425 struct nfs4_state *state = opendata->state;
426 struct nfs_inode *nfsi = NFS_I(state->inode);
427 struct nfs_delegation *delegation;
428 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
429 nfs4_stateid stateid;
430 int ret = -EAGAIN;
431
432 rcu_read_lock();
433 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400434 for (;;) {
Trond Myklebust6ee41262007-07-08 14:11:36 -0400435 if (can_open_cached(state, open_mode)) {
436 spin_lock(&state->owner->so_lock);
437 if (can_open_cached(state, open_mode)) {
438 update_open_stateflags(state, open_mode);
439 spin_unlock(&state->owner->so_lock);
440 rcu_read_unlock();
441 goto out_return_state;
442 }
443 spin_unlock(&state->owner->so_lock);
444 }
445 if (delegation == NULL)
446 break;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400447 if (!can_open_delegated(delegation, open_mode))
448 break;
449 /* Save the delegation */
450 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
451 rcu_read_unlock();
452 lock_kernel();
Trond Myklebustaf22f942007-08-10 17:45:10 -0400453 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400454 unlock_kernel();
455 if (ret != 0)
456 goto out;
457 ret = -EAGAIN;
458 rcu_read_lock();
459 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebust6ee41262007-07-08 14:11:36 -0400460 /* If no delegation, try a cached open */
Trond Myklebustaac00a82007-07-05 19:02:21 -0400461 if (delegation == NULL)
Trond Myklebust6ee41262007-07-08 14:11:36 -0400462 continue;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400463 /* Is the delegation still valid? */
464 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
465 continue;
466 rcu_read_unlock();
467 update_open_stateid(state, NULL, &stateid, open_mode);
468 goto out_return_state;
469 }
Trond Myklebustaac00a82007-07-05 19:02:21 -0400470 rcu_read_unlock();
471out:
472 return ERR_PTR(ret);
473out_return_state:
474 atomic_inc(&state->count);
475 return state;
476}
477
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100478static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
479{
480 struct inode *inode;
481 struct nfs4_state *state = NULL;
Trond Myklebust003707c2007-07-05 18:07:55 -0400482 struct nfs_delegation *delegation;
483 nfs4_stateid *deleg_stateid = NULL;
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400484 int ret;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100485
Trond Myklebustaac00a82007-07-05 19:02:21 -0400486 if (!data->rpc_done) {
Trond Myklebust6ee41262007-07-08 14:11:36 -0400487 state = nfs4_try_open_cached(data);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400488 goto out;
489 }
490
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400491 ret = -EAGAIN;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100492 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400493 goto err;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100494 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400495 ret = PTR_ERR(inode);
Trond Myklebust03f28e32006-03-20 13:44:48 -0500496 if (IS_ERR(inode))
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400497 goto err;
498 ret = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100499 state = nfs4_get_open_state(inode, data->owner);
500 if (state == NULL)
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400501 goto err_put_inode;
Trond Myklebust549d6ed2007-07-03 16:42:45 -0400502 if (data->o_res.delegation_type != 0) {
Trond Myklebust549d6ed2007-07-03 16:42:45 -0400503 int delegation_flags = 0;
504
Trond Myklebust003707c2007-07-05 18:07:55 -0400505 rcu_read_lock();
506 delegation = rcu_dereference(NFS_I(inode)->delegation);
507 if (delegation)
508 delegation_flags = delegation->flags;
509 rcu_read_unlock();
Trond Myklebust549d6ed2007-07-03 16:42:45 -0400510 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
511 nfs_inode_set_delegation(state->inode,
512 data->owner->so_cred,
513 &data->o_res);
514 else
515 nfs_inode_reclaim_delegation(state->inode,
516 data->owner->so_cred,
517 &data->o_res);
518 }
Trond Myklebust003707c2007-07-05 18:07:55 -0400519 rcu_read_lock();
520 delegation = rcu_dereference(NFS_I(inode)->delegation);
521 if (delegation != NULL)
522 deleg_stateid = &delegation->stateid;
523 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
524 rcu_read_unlock();
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100525 iput(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400526out:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100527 return state;
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400528err_put_inode:
529 iput(inode);
530err:
531 return ERR_PTR(ret);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100532}
533
Trond Myklebust864472e2006-01-03 09:55:15 +0100534static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
535{
536 struct nfs_inode *nfsi = NFS_I(state->inode);
537 struct nfs_open_context *ctx;
538
539 spin_lock(&state->inode->i_lock);
540 list_for_each_entry(ctx, &nfsi->open_files, list) {
541 if (ctx->state != state)
542 continue;
543 get_nfs_open_context(ctx);
544 spin_unlock(&state->inode->i_lock);
545 return ctx;
546 }
547 spin_unlock(&state->inode->i_lock);
548 return ERR_PTR(-ENOENT);
549}
550
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400551static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
552{
553 struct nfs4_opendata *opendata;
554
555 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
556 if (opendata == NULL)
557 return ERR_PTR(-ENOMEM);
558 opendata->state = state;
559 atomic_inc(&state->count);
560 return opendata;
561}
562
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400563static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
Trond Myklebust864472e2006-01-03 09:55:15 +0100564{
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400565 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +0100566 int ret;
567
568 opendata->o_arg.open_flags = openflags;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400569 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
570 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
571 nfs4_init_opendata_res(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100572 ret = _nfs4_proc_open(opendata);
573 if (ret != 0)
574 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400575 newstate = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400576 if (IS_ERR(newstate))
577 return PTR_ERR(newstate);
578 nfs4_close_state(&opendata->path, newstate, openflags);
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400579 *res = newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +0100580 return 0;
581}
582
583static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
584{
Trond Myklebust864472e2006-01-03 09:55:15 +0100585 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +0100586 int ret;
587
588 /* memory barrier prior to reading state->n_* */
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400589 clear_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +0100590 smp_rmb();
591 if (state->n_rdwr != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400592 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +0100593 if (ret != 0)
594 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400595 if (newstate != state)
596 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +0100597 }
598 if (state->n_wronly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400599 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +0100600 if (ret != 0)
601 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400602 if (newstate != state)
603 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +0100604 }
605 if (state->n_rdonly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400606 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +0100607 if (ret != 0)
608 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400609 if (newstate != state)
610 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +0100611 }
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400612 /*
613 * We may have performed cached opens for all three recoveries.
614 * Check if we need to update the current stateid.
615 */
616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
617 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400618 write_seqlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
620 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400621 write_sequnlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400622 }
Trond Myklebust864472e2006-01-03 09:55:15 +0100623 return 0;
624}
625
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626/*
627 * OPEN_RECLAIM:
628 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 */
Trond Myklebust539cd032007-06-05 11:46:42 -0400630static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631{
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400632 struct nfs_delegation *delegation;
Trond Myklebust864472e2006-01-03 09:55:15 +0100633 struct nfs4_opendata *opendata;
634 int delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 int status;
636
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400637 opendata = nfs4_open_recoverdata_alloc(ctx, state);
638 if (IS_ERR(opendata))
639 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100640 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
641 opendata->o_arg.fh = NFS_FH(state->inode);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400642 rcu_read_lock();
643 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
644 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
Trond Myklebust65bbf6b2007-08-27 09:57:46 -0400645 delegation_type = delegation->type;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400646 rcu_read_unlock();
Trond Myklebust864472e2006-01-03 09:55:15 +0100647 opendata->o_arg.u.delegation_type = delegation_type;
648 status = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400649 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 return status;
651}
652
Trond Myklebust539cd032007-06-05 11:46:42 -0400653static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654{
655 struct nfs_server *server = NFS_SERVER(state->inode);
656 struct nfs4_exception exception = { };
657 int err;
658 do {
Trond Myklebust539cd032007-06-05 11:46:42 -0400659 err = _nfs4_do_open_reclaim(ctx, state);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000660 if (err != -NFS4ERR_DELAY)
661 break;
662 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 } while (exception.retry);
664 return err;
665}
666
Trond Myklebust864472e2006-01-03 09:55:15 +0100667static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
668{
669 struct nfs_open_context *ctx;
670 int ret;
671
672 ctx = nfs4_state_find_open_context(state);
673 if (IS_ERR(ctx))
674 return PTR_ERR(ctx);
Trond Myklebust539cd032007-06-05 11:46:42 -0400675 ret = nfs4_do_open_reclaim(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +0100676 put_nfs_open_context(ctx);
677 return ret;
678}
679
Trond Myklebust13437e12007-07-06 15:10:43 -0400680static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100682 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +0100683 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400685 opendata = nfs4_open_recoverdata_alloc(ctx, state);
686 if (IS_ERR(opendata))
687 return PTR_ERR(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100688 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
Trond Myklebust13437e12007-07-06 15:10:43 -0400689 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100690 sizeof(opendata->o_arg.u.delegation.data));
Trond Myklebust864472e2006-01-03 09:55:15 +0100691 ret = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400692 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100693 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694}
695
Trond Myklebust13437e12007-07-06 15:10:43 -0400696int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697{
698 struct nfs4_exception exception = { };
Trond Myklebust539cd032007-06-05 11:46:42 -0400699 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 int err;
701 do {
Trond Myklebust13437e12007-07-06 15:10:43 -0400702 err = _nfs4_open_delegation_recall(ctx, state, stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 switch (err) {
704 case 0:
705 return err;
706 case -NFS4ERR_STALE_CLIENTID:
707 case -NFS4ERR_STALE_STATEID:
708 case -NFS4ERR_EXPIRED:
709 /* Don't recall a delegation if it was lost */
David Howells7539bba2006-08-22 20:06:09 -0400710 nfs4_schedule_state_recovery(server->nfs_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 return err;
712 }
713 err = nfs4_handle_exception(server, err, &exception);
714 } while (exception.retry);
715 return err;
716}
717
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100718static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
719{
720 struct nfs4_opendata *data = calldata;
721
722 data->rpc_status = task->tk_status;
723 if (RPC_ASSASSINATED(task))
724 return;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100725 if (data->rpc_status == 0) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100726 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
727 sizeof(data->o_res.stateid.data));
Trond Myklebustbb226292008-01-02 15:19:18 -0500728 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +0100729 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust3e309912007-07-07 13:19:59 -0400730 data->rpc_done = 1;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100731 }
Trond Myklebust0f9f95e2007-07-08 16:19:56 -0400732 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100733}
734
735static void nfs4_open_confirm_release(void *calldata)
736{
737 struct nfs4_opendata *data = calldata;
738 struct nfs4_state *state = NULL;
739
740 /* If this request hasn't been cancelled, do nothing */
741 if (data->cancelled == 0)
742 goto out_free;
743 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -0400744 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100745 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100746 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400747 if (!IS_ERR(state))
Trond Myklebust4a35bd42007-06-05 10:31:33 -0400748 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100749out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400750 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100751}
752
753static const struct rpc_call_ops nfs4_open_confirm_ops = {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100754 .rpc_call_done = nfs4_open_confirm_done,
755 .rpc_release = nfs4_open_confirm_release,
756};
757
758/*
759 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
760 */
761static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
762{
763 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
764 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400765 struct rpc_message msg = {
766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
767 .rpc_argp = &data->c_arg,
768 .rpc_resp = &data->c_res,
769 .rpc_cred = data->owner->so_cred,
770 };
Trond Myklebustc970aa82007-07-14 15:39:59 -0400771 struct rpc_task_setup task_setup_data = {
772 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400773 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400774 .callback_ops = &nfs4_open_confirm_ops,
775 .callback_data = data,
776 .flags = RPC_TASK_ASYNC,
777 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 int status;
779
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400780 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -0400781 data->rpc_done = 0;
782 data->rpc_status = 0;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400783 data->timestamp = jiffies;
Trond Myklebustc970aa82007-07-14 15:39:59 -0400784 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500785 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100786 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100787 status = nfs4_wait_for_completion_rpc_task(task);
788 if (status != 0) {
789 data->cancelled = 1;
790 smp_wmb();
791 } else
792 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -0500793 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 return status;
795}
796
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100797static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798{
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100799 struct nfs4_opendata *data = calldata;
800 struct nfs4_state_owner *sp = data->owner;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400801
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100802 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
803 return;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400804 /*
805 * Check if we still need to send an OPEN call, or if we can use
806 * a delegation instead.
807 */
808 if (data->state != NULL) {
809 struct nfs_delegation *delegation;
810
Trond Myklebust6ee41262007-07-08 14:11:36 -0400811 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
812 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400813 rcu_read_lock();
814 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
815 if (delegation != NULL &&
816 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
817 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -0400818 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400819 }
820 rcu_read_unlock();
821 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100822 /* Update sequence id. */
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400823 data->o_arg.id = sp->so_owner_id.id;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100824 data->o_arg.clientid = sp->so_client->cl_clientid;
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400825 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
Trond Myklebust5138fde2007-07-14 15:40:01 -0400826 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400827 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
828 }
Trond Myklebust26e976a2006-01-03 09:55:21 +0100829 data->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400830 rpc_call_start(task);
Trond Myklebust6ee41262007-07-08 14:11:36 -0400831 return;
832out_no_action:
833 task->tk_action = NULL;
834
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100835}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100837static void nfs4_open_done(struct rpc_task *task, void *calldata)
838{
839 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100841 data->rpc_status = task->tk_status;
842 if (RPC_ASSASSINATED(task))
843 return;
844 if (task->tk_status == 0) {
845 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -0700846 case S_IFREG:
847 break;
848 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100849 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700850 break;
851 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100852 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700853 break;
854 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100855 data->rpc_status = -ENOTDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700856 }
Trond Myklebust26e976a2006-01-03 09:55:21 +0100857 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust0f9f95e2007-07-08 16:19:56 -0400858 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
859 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust6f926b52005-10-18 14:20:18 -0700860 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100861 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
Trond Myklebust3e309912007-07-07 13:19:59 -0400862 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100863}
Trond Myklebust6f926b52005-10-18 14:20:18 -0700864
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100865static void nfs4_open_release(void *calldata)
866{
867 struct nfs4_opendata *data = calldata;
868 struct nfs4_state *state = NULL;
869
870 /* If this request hasn't been cancelled, do nothing */
871 if (data->cancelled == 0)
872 goto out_free;
873 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -0400874 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100875 goto out_free;
876 /* In case we need an open_confirm, no cleanup! */
877 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
878 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100879 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400880 if (!IS_ERR(state))
Trond Myklebust4a35bd42007-06-05 10:31:33 -0400881 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100882out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400883 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100884}
885
886static const struct rpc_call_ops nfs4_open_ops = {
887 .rpc_call_prepare = nfs4_open_prepare,
888 .rpc_call_done = nfs4_open_done,
889 .rpc_release = nfs4_open_release,
890};
891
892/*
893 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
894 */
895static int _nfs4_proc_open(struct nfs4_opendata *data)
896{
897 struct inode *dir = data->dir->d_inode;
898 struct nfs_server *server = NFS_SERVER(dir);
899 struct nfs_openargs *o_arg = &data->o_arg;
900 struct nfs_openres *o_res = &data->o_res;
901 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400902 struct rpc_message msg = {
903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
904 .rpc_argp = o_arg,
905 .rpc_resp = o_res,
906 .rpc_cred = data->owner->so_cred,
907 };
Trond Myklebustc970aa82007-07-14 15:39:59 -0400908 struct rpc_task_setup task_setup_data = {
909 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400910 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400911 .callback_ops = &nfs4_open_ops,
912 .callback_data = data,
913 .flags = RPC_TASK_ASYNC,
914 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100915 int status;
916
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400917 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -0400918 data->rpc_done = 0;
919 data->rpc_status = 0;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400920 data->cancelled = 0;
Trond Myklebustc970aa82007-07-14 15:39:59 -0400921 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500922 if (IS_ERR(task))
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100923 return PTR_ERR(task);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100924 status = nfs4_wait_for_completion_rpc_task(task);
925 if (status != 0) {
926 data->cancelled = 1;
927 smp_wmb();
928 } else
929 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -0500930 rpc_put_task(task);
Trond Myklebust3e309912007-07-07 13:19:59 -0400931 if (status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100932 return status;
933
Trond Myklebust99367812007-07-17 21:52:41 -0400934 if (o_res->fh.size == 0)
935 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
936
Trond Myklebust56ae19f2005-10-27 22:12:40 -0400937 if (o_arg->open_flags & O_CREAT) {
938 update_changeattr(dir, &o_res->cinfo);
939 nfs_post_op_update_inode(dir, o_res->dir_attr);
940 } else
941 nfs_refresh_inode(dir, o_res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100943 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100945 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 }
947 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Trond Myklebust99367812007-07-17 21:52:41 -0400948 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100949 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950}
951
Trond Myklebust10afec92007-05-14 17:16:04 -0400952static int nfs4_recover_expired_lease(struct nfs_server *server)
Trond Myklebust58d97142006-01-03 09:55:24 +0100953{
David Howells7539bba2006-08-22 20:06:09 -0400954 struct nfs_client *clp = server->nfs_client;
Trond Myklebust6b309542006-09-14 14:03:14 -0400955 int ret;
Trond Myklebust58d97142006-01-03 09:55:24 +0100956
Trond Myklebust6b309542006-09-14 14:03:14 -0400957 for (;;) {
958 ret = nfs4_wait_clnt_recover(server->client, clp);
959 if (ret != 0)
960 return ret;
961 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
962 break;
Trond Myklebust58d97142006-01-03 09:55:24 +0100963 nfs4_schedule_state_recovery(clp);
Trond Myklebust6b309542006-09-14 14:03:14 -0400964 }
965 return 0;
Trond Myklebust58d97142006-01-03 09:55:24 +0100966}
967
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968/*
969 * OPEN_EXPIRED:
970 * reclaim state on the server after a network partition.
971 * Assumes caller holds the appropriate lock
972 */
Trond Myklebust539cd032007-06-05 11:46:42 -0400973static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100975 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +0100976 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400978 opendata = nfs4_open_recoverdata_alloc(ctx, state);
979 if (IS_ERR(opendata))
980 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100981 ret = nfs4_open_recover(opendata, state);
982 if (ret == -ESTALE) {
983 /* Invalidate the state owner so we don't ever use it again */
Trond Myklebust539cd032007-06-05 11:46:42 -0400984 nfs4_drop_state_owner(state->owner);
985 d_drop(ctx->path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 }
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400987 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100988 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989}
990
Trond Myklebust539cd032007-06-05 11:46:42 -0400991static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +0000992{
Trond Myklebust539cd032007-06-05 11:46:42 -0400993 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000994 struct nfs4_exception exception = { };
995 int err;
996
997 do {
Trond Myklebust539cd032007-06-05 11:46:42 -0400998 err = _nfs4_open_expired(ctx, state);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000999 if (err == -NFS4ERR_DELAY)
1000 nfs4_handle_exception(server, err, &exception);
1001 } while (exception.retry);
1002 return err;
1003}
1004
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1006{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01001008 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009
Trond Myklebust864472e2006-01-03 09:55:15 +01001010 ctx = nfs4_state_find_open_context(state);
1011 if (IS_ERR(ctx))
1012 return PTR_ERR(ctx);
Trond Myklebust539cd032007-06-05 11:46:42 -04001013 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001014 put_nfs_open_context(ctx);
1015 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016}
1017
1018/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001019 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1020 * fields corresponding to attributes that were used to store the verifier.
1021 * Make sure we clobber those fields in the later setattr call
1022 */
1023static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1024{
1025 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1026 !(sattr->ia_valid & ATTR_ATIME_SET))
1027 sattr->ia_valid |= ATTR_ATIME;
1028
1029 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1030 !(sattr->ia_valid & ATTR_MTIME_SET))
1031 sattr->ia_valid |= ATTR_MTIME;
1032}
1033
1034/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001035 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 */
Trond Myklebustad389da2007-06-05 12:30:00 -04001037static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038{
1039 struct nfs4_state_owner *sp;
1040 struct nfs4_state *state = NULL;
1041 struct nfs_server *server = NFS_SERVER(dir);
David Howells7539bba2006-08-22 20:06:09 -04001042 struct nfs_client *clp = server->nfs_client;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001043 struct nfs4_opendata *opendata;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001044 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045
1046 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 status = -ENOMEM;
1048 if (!(sp = nfs4_get_state_owner(server, cred))) {
1049 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1050 goto out_err;
1051 }
Trond Myklebust58d97142006-01-03 09:55:24 +01001052 status = nfs4_recover_expired_lease(server);
1053 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01001054 goto err_put_state_owner;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001055 if (path->dentry->d_inode != NULL)
1056 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
Trond Myklebust58d97142006-01-03 09:55:24 +01001057 down_read(&clp->cl_sem);
1058 status = -ENOMEM;
Trond Myklebustad389da2007-06-05 12:30:00 -04001059 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001060 if (opendata == NULL)
Trond Myklebust76723de2006-09-15 08:11:51 -04001061 goto err_release_rwsem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Trond Myklebustaac00a82007-07-05 19:02:21 -04001063 if (path->dentry->d_inode != NULL)
1064 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1065
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001066 status = _nfs4_proc_open(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 if (status != 0)
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001068 goto err_opendata_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001070 if (opendata->o_arg.open_flags & O_EXCL)
1071 nfs4_exclusive_attrset(opendata, sattr);
1072
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001073 state = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001074 status = PTR_ERR(state);
1075 if (IS_ERR(state))
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001076 goto err_opendata_put;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001077 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 nfs4_put_state_owner(sp);
1079 up_read(&clp->cl_sem);
1080 *res = state;
1081 return 0;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001082err_opendata_put:
1083 nfs4_opendata_put(opendata);
Trond Myklebust76723de2006-09-15 08:11:51 -04001084err_release_rwsem:
1085 up_read(&clp->cl_sem);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001086err_put_state_owner:
1087 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 *res = NULL;
1090 return status;
1091}
1092
1093
Trond Myklebustad389da2007-06-05 12:30:00 -04001094static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095{
1096 struct nfs4_exception exception = { };
1097 struct nfs4_state *res;
1098 int status;
1099
1100 do {
Trond Myklebustad389da2007-06-05 12:30:00 -04001101 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 if (status == 0)
1103 break;
1104 /* NOTE: BAD_SEQID means the server and client disagree about the
1105 * book-keeping w.r.t. state-changing operations
1106 * (OPEN/CLOSE/LOCK/LOCKU...)
1107 * It is actually a sign of a bug on the client or on the server.
1108 *
1109 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001110 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 * have unhashed the old state_owner for us, and that we can
1112 * therefore safely retry using a new one. We should still warn
1113 * the user though...
1114 */
1115 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04001116 printk(KERN_WARNING "NFS: v4 server %s "
1117 " returned a bad sequence-id error!\n",
1118 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 exception.retry = 1;
1120 continue;
1121 }
Trond Myklebust550f5742005-10-18 14:20:21 -07001122 /*
1123 * BAD_STATEID on OPEN means that the server cancelled our
1124 * state before it received the OPEN_CONFIRM.
1125 * Recover by retrying the request as per the discussion
1126 * on Page 181 of RFC3530.
1127 */
1128 if (status == -NFS4ERR_BAD_STATEID) {
1129 exception.retry = 1;
1130 continue;
1131 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001132 if (status == -EAGAIN) {
1133 /* We must have found a delegation */
1134 exception.retry = 1;
1135 continue;
1136 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1138 status, &exception));
1139 } while (exception.retry);
1140 return res;
1141}
1142
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001143static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1144 struct iattr *sattr, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001146 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001148 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 .iap = sattr,
1150 .server = server,
1151 .bitmask = server->attr_bitmask,
1152 };
1153 struct nfs_setattrres res = {
1154 .fattr = fattr,
1155 .server = server,
1156 };
1157 struct rpc_message msg = {
1158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1159 .rpc_argp = &arg,
1160 .rpc_resp = &res,
1161 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01001162 unsigned long timestamp = jiffies;
Trond Myklebust65e43082005-08-16 11:49:44 -04001163 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164
Trond Myklebust0e574af2005-10-27 22:12:38 -04001165 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001167 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1168 /* Use that stateid */
1169 } else if (state != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 msg.rpc_cred = state->owner->so_cred;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001171 nfs4_copy_stateid(&arg.stateid, state, current->files);
1172 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1174
Trond Myklebust65e43082005-08-16 11:49:44 -04001175 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001176 if (status == 0 && state != NULL)
1177 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04001178 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179}
1180
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001181static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1182 struct iattr *sattr, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001184 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 struct nfs4_exception exception = { };
1186 int err;
1187 do {
1188 err = nfs4_handle_exception(server,
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001189 _nfs4_do_setattr(inode, fattr, sattr, state),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 &exception);
1191 } while (exception.retry);
1192 return err;
1193}
1194
1195struct nfs4_closedata {
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001196 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 struct inode *inode;
1198 struct nfs4_state *state;
1199 struct nfs_closeargs arg;
1200 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001201 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001202 unsigned long timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203};
1204
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001205static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07001206{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001207 struct nfs4_closedata *calldata = data;
1208 struct nfs4_state_owner *sp = calldata->state->owner;
Trond Myklebust95121352005-10-18 14:20:12 -07001209
1210 nfs4_put_open_state(calldata->state);
1211 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001212 nfs4_put_state_owner(sp);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001213 dput(calldata->path.dentry);
1214 mntput(calldata->path.mnt);
Trond Myklebust95121352005-10-18 14:20:12 -07001215 kfree(calldata);
1216}
1217
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001218static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001220 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 struct nfs_server *server = NFS_SERVER(calldata->inode);
1223
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001224 if (RPC_ASSASSINATED(task))
1225 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 /* hmm. we are done with the inode, and in the process of freeing
1227 * the state_owner. we keep this around to process errors
1228 */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001229 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 switch (task->tk_status) {
1231 case 0:
Trond Myklebust45328c32007-07-26 17:47:34 -04001232 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001233 renew_lease(server, calldata->timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 break;
1235 case -NFS4ERR_STALE_STATEID:
1236 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 break;
1238 default:
1239 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1240 rpc_restart_call(task);
1241 return;
1242 }
1243 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001244 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245}
1246
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001247static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001249 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07001250 struct nfs4_state *state = calldata->state;
Trond Myklebust003707c2007-07-05 18:07:55 -04001251 int clear_rd, clear_wr, clear_rdwr;
Trond Myklebust95121352005-10-18 14:20:12 -07001252
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001253 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebust95121352005-10-18 14:20:12 -07001254 return;
Trond Myklebust003707c2007-07-05 18:07:55 -04001255
Trond Myklebust003707c2007-07-05 18:07:55 -04001256 clear_rd = clear_wr = clear_rdwr = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05001257 spin_lock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001258 /* Calculate the change in open mode */
Trond Myklebuste7616922006-01-03 09:55:13 +01001259 if (state->n_rdwr == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001260 if (state->n_rdonly == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001261 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1263 }
1264 if (state->n_wronly == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001265 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1266 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1267 }
Trond Myklebuste7616922006-01-03 09:55:13 +01001268 }
Trond Myklebust4cecb762005-11-04 15:32:58 -05001269 spin_unlock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001270 if (!clear_rd && !clear_wr && !clear_rdwr) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001271 /* Note: exit _without_ calling nfs4_close_done */
1272 task->tk_action = NULL;
Trond Myklebust95121352005-10-18 14:20:12 -07001273 return;
1274 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001275 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust45328c32007-07-26 17:47:34 -04001276 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
Trond Myklebust5138fde2007-07-14 15:40:01 -04001277 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust45328c32007-07-26 17:47:34 -04001278 calldata->arg.open_flags = FMODE_READ;
1279 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
Trond Myklebust5138fde2007-07-14 15:40:01 -04001280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust45328c32007-07-26 17:47:34 -04001281 calldata->arg.open_flags = FMODE_WRITE;
1282 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001283 calldata->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001284 rpc_call_start(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
1286
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001287static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001288 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001289 .rpc_call_done = nfs4_close_done,
1290 .rpc_release = nfs4_free_closedata,
1291};
1292
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293/*
1294 * It is possible for data to be read/written from a mem-mapped file
1295 * after the sys_close call (which hits the vfs layer as a flush).
1296 * This means that we can't safely call nfsv4 close on a file until
1297 * the inode is cleared. This in turn means that we are not good
1298 * NFSv4 citizens - we do not indicate to the server to update the file's
1299 * share state even when we are done with one of the three share
1300 * stateid's in the inode.
1301 *
1302 * NOTE: Caller must be holding the sp->so_owner semaphore!
1303 */
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001304int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001306 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04001308 struct nfs4_state_owner *sp = state->owner;
1309 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001310 struct rpc_message msg = {
1311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1312 .rpc_cred = state->owner->so_cred,
1313 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001314 struct rpc_task_setup task_setup_data = {
1315 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001316 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001317 .callback_ops = &nfs4_close_ops,
1318 .flags = RPC_TASK_ASYNC,
1319 };
Trond Myklebust95121352005-10-18 14:20:12 -07001320 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321
Trond Myklebust95121352005-10-18 14:20:12 -07001322 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07001324 goto out;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001325 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001327 calldata->arg.fh = NFS_FH(state->inode);
Trond Myklebust003707c2007-07-05 18:07:55 -04001328 calldata->arg.stateid = &state->open_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 /* Serialization for the sequence id */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001330 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001331 if (calldata->arg.seqid == NULL)
1332 goto out_free_calldata;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001333 calldata->arg.bitmask = server->attr_bitmask;
1334 calldata->res.fattr = &calldata->fattr;
1335 calldata->res.server = server;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001336 calldata->path.mnt = mntget(path->mnt);
1337 calldata->path.dentry = dget(path->dentry);
Trond Myklebust95121352005-10-18 14:20:12 -07001338
Trond Myklebust5138fde2007-07-14 15:40:01 -04001339 msg.rpc_argp = &calldata->arg,
1340 msg.rpc_resp = &calldata->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001341 task_setup_data.callback_data = calldata;
1342 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04001343 if (IS_ERR(task))
1344 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001345 status = 0;
1346 if (wait)
1347 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04001348 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001349 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07001350out_free_calldata:
1351 kfree(calldata);
1352out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04001353 nfs4_put_open_state(state);
1354 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07001355 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356}
1357
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001358static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
Trond Myklebust02a913a2005-10-18 14:20:17 -07001359{
1360 struct file *filp;
Trond Myklebust1b45c462007-07-03 13:04:56 -04001361 int ret;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001362
Trond Myklebust1b45c462007-07-03 13:04:56 -04001363 /* If the open_intent is for execute, we have an extra check to make */
1364 if (nd->intent.open.flags & FMODE_EXEC) {
Trond Myklebustaf22f942007-08-10 17:45:10 -04001365 ret = nfs_may_open(state->inode,
Trond Myklebust1b45c462007-07-03 13:04:56 -04001366 state->owner->so_cred,
1367 nd->intent.open.flags);
1368 if (ret < 0)
1369 goto out_close;
1370 }
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001371 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001372 if (!IS_ERR(filp)) {
1373 struct nfs_open_context *ctx;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04001374 ctx = nfs_file_open_context(filp);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001375 ctx->state = state;
Trond Myklebust95cf9592006-04-18 13:14:06 -04001376 return 0;
1377 }
Trond Myklebust1b45c462007-07-03 13:04:56 -04001378 ret = PTR_ERR(filp);
1379out_close:
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001380 nfs4_close_sync(path, state, nd->intent.open.flags);
Trond Myklebust1b45c462007-07-03 13:04:56 -04001381 return ret;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001382}
1383
1384struct dentry *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1386{
Trond Myklebustad389da2007-06-05 12:30:00 -04001387 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001388 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001389 .dentry = dentry,
1390 };
Jan Blunck4ac91372008-02-14 19:34:32 -08001391 struct dentry *parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 struct iattr attr;
1393 struct rpc_cred *cred;
1394 struct nfs4_state *state;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001395 struct dentry *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
1397 if (nd->flags & LOOKUP_CREATE) {
1398 attr.ia_mode = nd->intent.open.create_mode;
1399 attr.ia_valid = ATTR_MODE;
1400 if (!IS_POSIXACL(dir))
1401 attr.ia_mode &= ~current->fs->umask;
1402 } else {
1403 attr.ia_valid = 0;
1404 BUG_ON(nd->intent.open.flags & O_CREAT);
1405 }
1406
David Howells1f163412006-08-22 20:06:11 -04001407 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 if (IS_ERR(cred))
Trond Myklebust02a913a2005-10-18 14:20:17 -07001409 return (struct dentry *)cred;
Trond Myklebust565277f2007-10-15 18:17:53 -04001410 parent = dentry->d_parent;
1411 /* Protect against concurrent sillydeletes */
1412 nfs_block_sillyrename(parent);
Trond Myklebustad389da2007-06-05 12:30:00 -04001413 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001415 if (IS_ERR(state)) {
Trond Myklebustd75340c2007-10-01 21:42:01 -04001416 if (PTR_ERR(state) == -ENOENT) {
Trond Myklebust02a913a2005-10-18 14:20:17 -07001417 d_add(dentry, NULL);
Trond Myklebustd75340c2007-10-01 21:42:01 -04001418 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1419 }
Trond Myklebust565277f2007-10-15 18:17:53 -04001420 nfs_unblock_sillyrename(parent);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001421 return (struct dentry *)state;
1422 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001423 res = d_add_unique(dentry, igrab(state->inode));
Trond Myklebust02a913a2005-10-18 14:20:17 -07001424 if (res != NULL)
Trond Myklebustdeee9362007-08-27 11:33:00 -04001425 path.dentry = res;
Trond Myklebustd75340c2007-10-01 21:42:01 -04001426 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
Trond Myklebust565277f2007-10-15 18:17:53 -04001427 nfs_unblock_sillyrename(parent);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001428 nfs4_intent_set_file(nd, &path, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001429 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430}
1431
1432int
Trond Myklebust02a913a2005-10-18 14:20:17 -07001433nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434{
Trond Myklebustad389da2007-06-05 12:30:00 -04001435 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001436 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001437 .dentry = dentry,
1438 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 struct rpc_cred *cred;
1440 struct nfs4_state *state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441
David Howells1f163412006-08-22 20:06:11 -04001442 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 if (IS_ERR(cred))
1444 return PTR_ERR(cred);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001445 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001447 if (IS_ERR(state)) {
1448 switch (PTR_ERR(state)) {
1449 case -EPERM:
1450 case -EACCES:
1451 case -EDQUOT:
1452 case -ENOSPC:
1453 case -EROFS:
1454 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1455 return 1;
Chuck Leverb87c0ad2006-10-19 23:28:42 -07001456 default:
1457 goto out_drop;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001458 }
Trond Myklebust02a913a2005-10-18 14:20:17 -07001459 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001460 if (state->inode == dentry->d_inode) {
Trond Myklebustd75340c2007-10-01 21:42:01 -04001461 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001462 nfs4_intent_set_file(nd, &path, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463 return 1;
1464 }
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001465 nfs4_close_sync(&path, state, openflags);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001466out_drop:
1467 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 return 0;
1469}
1470
1471
1472static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1473{
1474 struct nfs4_server_caps_res res = {};
1475 struct rpc_message msg = {
1476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1477 .rpc_argp = fhandle,
1478 .rpc_resp = &res,
1479 };
1480 int status;
1481
1482 status = rpc_call_sync(server->client, &msg, 0);
1483 if (status == 0) {
1484 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1485 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1486 server->caps |= NFS_CAP_ACLS;
1487 if (res.has_links != 0)
1488 server->caps |= NFS_CAP_HARDLINKS;
1489 if (res.has_symlinks != 0)
1490 server->caps |= NFS_CAP_SYMLINKS;
1491 server->acl_bitmask = res.acl_bitmask;
1492 }
1493 return status;
1494}
1495
Trond Myklebust55a97592006-06-09 09:34:19 -04001496int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497{
1498 struct nfs4_exception exception = { };
1499 int err;
1500 do {
1501 err = nfs4_handle_exception(server,
1502 _nfs4_server_capabilities(server, fhandle),
1503 &exception);
1504 } while (exception.retry);
1505 return err;
1506}
1507
1508static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1509 struct nfs_fsinfo *info)
1510{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 struct nfs4_lookup_root_arg args = {
1512 .bitmask = nfs4_fattr_bitmap,
1513 };
1514 struct nfs4_lookup_res res = {
1515 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04001516 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 .fh = fhandle,
1518 };
1519 struct rpc_message msg = {
1520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1521 .rpc_argp = &args,
1522 .rpc_resp = &res,
1523 };
Trond Myklebust0e574af2005-10-27 22:12:38 -04001524 nfs_fattr_init(info->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525 return rpc_call_sync(server->client, &msg, 0);
1526}
1527
1528static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1529 struct nfs_fsinfo *info)
1530{
1531 struct nfs4_exception exception = { };
1532 int err;
1533 do {
1534 err = nfs4_handle_exception(server,
1535 _nfs4_lookup_root(server, fhandle, info),
1536 &exception);
1537 } while (exception.retry);
1538 return err;
1539}
1540
David Howells54ceac42006-08-22 20:06:13 -04001541/*
1542 * get the file handle for the "/" directory on the server
1543 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04001545 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 int status;
1548
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 status = nfs4_lookup_root(server, fhandle, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 if (status == 0)
1551 status = nfs4_server_capabilities(server, fhandle);
1552 if (status == 0)
1553 status = nfs4_do_fsinfo(server, fhandle, info);
Trond Myklebustc12e87f2006-03-13 21:20:47 -08001554 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555}
1556
Manoj Naik6b97fd32006-06-09 09:34:29 -04001557/*
1558 * Get locations and (maybe) other attributes of a referral.
1559 * Note that we'll actually follow the referral later when
1560 * we detect fsid mismatch in inode revalidation
1561 */
Trond Myklebust56659e92007-07-17 21:52:39 -04001562static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
Manoj Naik6b97fd32006-06-09 09:34:29 -04001563{
1564 int status = -ENOMEM;
1565 struct page *page = NULL;
1566 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04001567
1568 page = alloc_page(GFP_KERNEL);
1569 if (page == NULL)
1570 goto out;
1571 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1572 if (locations == NULL)
1573 goto out;
1574
Trond Myklebustc228fd32007-01-13 02:28:11 -05001575 status = nfs4_proc_fs_locations(dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001576 if (status != 0)
1577 goto out;
1578 /* Make sure server returned a different fsid for the referral */
1579 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1580 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1581 status = -EIO;
1582 goto out;
1583 }
1584
1585 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1586 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1587 if (!fattr->mode)
1588 fattr->mode = S_IFDIR;
1589 memset(fhandle, 0, sizeof(struct nfs_fh));
1590out:
1591 if (page)
1592 __free_page(page);
1593 if (locations)
1594 kfree(locations);
1595 return status;
1596}
1597
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1599{
1600 struct nfs4_getattr_arg args = {
1601 .fh = fhandle,
1602 .bitmask = server->attr_bitmask,
1603 };
1604 struct nfs4_getattr_res res = {
1605 .fattr = fattr,
1606 .server = server,
1607 };
1608 struct rpc_message msg = {
1609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1610 .rpc_argp = &args,
1611 .rpc_resp = &res,
1612 };
1613
Trond Myklebust0e574af2005-10-27 22:12:38 -04001614 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 return rpc_call_sync(server->client, &msg, 0);
1616}
1617
1618static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1619{
1620 struct nfs4_exception exception = { };
1621 int err;
1622 do {
1623 err = nfs4_handle_exception(server,
1624 _nfs4_proc_getattr(server, fhandle, fattr),
1625 &exception);
1626 } while (exception.retry);
1627 return err;
1628}
1629
1630/*
1631 * The file is not closed if it is opened due to the a request to change
1632 * the size of the file. The open call will not be needed once the
1633 * VFS layer lookup-intents are implemented.
1634 *
1635 * Close is called when the inode is destroyed.
1636 * If we haven't opened the file for O_WRONLY, we
1637 * need to in the size_change case to obtain a stateid.
1638 *
1639 * Got race?
1640 * Because OPEN is always done by name in nfsv4, it is
1641 * possible that we opened a different file by the same
1642 * name. We can recognize this race condition, but we
1643 * can't do anything about it besides returning an error.
1644 *
1645 * This will be fixed with VFS changes (lookup-intent).
1646 */
1647static int
1648nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1649 struct iattr *sattr)
1650{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001651 struct rpc_cred *cred;
1652 struct inode *inode = dentry->d_inode;
Trond Myklebustd5308382005-11-04 15:33:38 -05001653 struct nfs_open_context *ctx;
1654 struct nfs4_state *state = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 int status;
1656
Trond Myklebust0e574af2005-10-27 22:12:38 -04001657 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
David Howells1f163412006-08-22 20:06:11 -04001659 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001660 if (IS_ERR(cred))
1661 return PTR_ERR(cred);
Trond Myklebustd5308382005-11-04 15:33:38 -05001662
1663 /* Search for an existing open(O_WRITE) file */
1664 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1665 if (ctx != NULL)
1666 state = ctx->state;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001667
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001668 status = nfs4_do_setattr(inode, fattr, sattr, state);
Trond Myklebust65e43082005-08-16 11:49:44 -04001669 if (status == 0)
1670 nfs_setattr_update_inode(inode, sattr);
Trond Myklebustd5308382005-11-04 15:33:38 -05001671 if (ctx != NULL)
1672 put_nfs_open_context(ctx);
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001673 put_rpccred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674 return status;
1675}
1676
Trond Myklebust56659e92007-07-17 21:52:39 -04001677static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1678 const struct qstr *name, struct nfs_fh *fhandle,
David Howells2b3de442006-08-22 20:06:09 -04001679 struct nfs_fattr *fattr)
1680{
1681 int status;
1682 struct nfs4_lookup_arg args = {
1683 .bitmask = server->attr_bitmask,
1684 .dir_fh = dirfh,
1685 .name = name,
1686 };
1687 struct nfs4_lookup_res res = {
1688 .server = server,
1689 .fattr = fattr,
1690 .fh = fhandle,
1691 };
1692 struct rpc_message msg = {
1693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1694 .rpc_argp = &args,
1695 .rpc_resp = &res,
1696 };
1697
1698 nfs_fattr_init(fattr);
1699
1700 dprintk("NFS call lookupfh %s\n", name->name);
1701 status = rpc_call_sync(server->client, &msg, 0);
1702 dprintk("NFS reply lookupfh: %d\n", status);
David Howells2b3de442006-08-22 20:06:09 -04001703 return status;
1704}
1705
1706static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1707 struct qstr *name, struct nfs_fh *fhandle,
1708 struct nfs_fattr *fattr)
1709{
1710 struct nfs4_exception exception = { };
1711 int err;
1712 do {
Trond Myklebust4e56e082007-07-01 18:13:52 -04001713 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1714 /* FIXME: !!!! */
1715 if (err == -NFS4ERR_MOVED) {
1716 err = -EREMOTE;
1717 break;
1718 }
1719 err = nfs4_handle_exception(server, err, &exception);
David Howells2b3de442006-08-22 20:06:09 -04001720 } while (exception.retry);
1721 return err;
1722}
1723
Trond Myklebust56659e92007-07-17 21:52:39 -04001724static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1726{
Trond Myklebust4e56e082007-07-01 18:13:52 -04001727 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
1729 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust4e56e082007-07-01 18:13:52 -04001730 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001731 if (status == -NFS4ERR_MOVED)
1732 status = nfs4_get_referral(dir, name, fattr, fhandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 dprintk("NFS reply lookup: %d\n", status);
1734 return status;
1735}
1736
1737static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1738{
1739 struct nfs4_exception exception = { };
1740 int err;
1741 do {
1742 err = nfs4_handle_exception(NFS_SERVER(dir),
1743 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1744 &exception);
1745 } while (exception.retry);
1746 return err;
1747}
1748
1749static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1750{
Trond Myklebust76b32992007-08-10 17:45:11 -04001751 struct nfs_server *server = NFS_SERVER(inode);
1752 struct nfs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 struct nfs4_accessargs args = {
1754 .fh = NFS_FH(inode),
Trond Myklebust76b32992007-08-10 17:45:11 -04001755 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 };
Trond Myklebust76b32992007-08-10 17:45:11 -04001757 struct nfs4_accessres res = {
1758 .server = server,
1759 .fattr = &fattr,
1760 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 struct rpc_message msg = {
1762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1763 .rpc_argp = &args,
1764 .rpc_resp = &res,
1765 .rpc_cred = entry->cred,
1766 };
1767 int mode = entry->mask;
1768 int status;
1769
1770 /*
1771 * Determine which access bits we want to ask for...
1772 */
1773 if (mode & MAY_READ)
1774 args.access |= NFS4_ACCESS_READ;
1775 if (S_ISDIR(inode->i_mode)) {
1776 if (mode & MAY_WRITE)
1777 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1778 if (mode & MAY_EXEC)
1779 args.access |= NFS4_ACCESS_LOOKUP;
1780 } else {
1781 if (mode & MAY_WRITE)
1782 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1783 if (mode & MAY_EXEC)
1784 args.access |= NFS4_ACCESS_EXECUTE;
1785 }
Trond Myklebust76b32992007-08-10 17:45:11 -04001786 nfs_fattr_init(&fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1788 if (!status) {
1789 entry->mask = 0;
1790 if (res.access & NFS4_ACCESS_READ)
1791 entry->mask |= MAY_READ;
1792 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1793 entry->mask |= MAY_WRITE;
1794 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1795 entry->mask |= MAY_EXEC;
Trond Myklebust76b32992007-08-10 17:45:11 -04001796 nfs_refresh_inode(inode, &fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797 }
1798 return status;
1799}
1800
1801static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1802{
1803 struct nfs4_exception exception = { };
1804 int err;
1805 do {
1806 err = nfs4_handle_exception(NFS_SERVER(inode),
1807 _nfs4_proc_access(inode, entry),
1808 &exception);
1809 } while (exception.retry);
1810 return err;
1811}
1812
1813/*
1814 * TODO: For the time being, we don't try to get any attributes
1815 * along with any of the zero-copy operations READ, READDIR,
1816 * READLINK, WRITE.
1817 *
1818 * In the case of the first three, we want to put the GETATTR
1819 * after the read-type operation -- this is because it is hard
1820 * to predict the length of a GETATTR response in v4, and thus
1821 * align the READ data correctly. This means that the GETATTR
1822 * may end up partially falling into the page cache, and we should
1823 * shift it into the 'tail' of the xdr_buf before processing.
1824 * To do this efficiently, we need to know the total length
1825 * of data received, which doesn't seem to be available outside
1826 * of the RPC layer.
1827 *
1828 * In the case of WRITE, we also want to put the GETATTR after
1829 * the operation -- in this case because we want to make sure
1830 * we get the post-operation mtime and size. This means that
1831 * we can't use xdr_encode_pages() as written: we need a variant
1832 * of it which would leave room in the 'tail' iovec.
1833 *
1834 * Both of these changes to the XDR layer would in fact be quite
1835 * minor, but I decided to leave them for a subsequent patch.
1836 */
1837static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1838 unsigned int pgbase, unsigned int pglen)
1839{
1840 struct nfs4_readlink args = {
1841 .fh = NFS_FH(inode),
1842 .pgbase = pgbase,
1843 .pglen = pglen,
1844 .pages = &page,
1845 };
1846 struct rpc_message msg = {
1847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1848 .rpc_argp = &args,
1849 .rpc_resp = NULL,
1850 };
1851
1852 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1853}
1854
1855static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1856 unsigned int pgbase, unsigned int pglen)
1857{
1858 struct nfs4_exception exception = { };
1859 int err;
1860 do {
1861 err = nfs4_handle_exception(NFS_SERVER(inode),
1862 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1863 &exception);
1864 } while (exception.retry);
1865 return err;
1866}
1867
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868/*
1869 * Got race?
1870 * We will need to arrange for the VFS layer to provide an atomic open.
1871 * Until then, this create/open method is prone to inefficiency and race
1872 * conditions due to the lookup, create, and open VFS calls from sys_open()
1873 * placed on the wire.
1874 *
1875 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1876 * The file will be opened again in the subsequent VFS open call
1877 * (nfs4_proc_file_open).
1878 *
1879 * The open for read will just hang around to be used by any process that
1880 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1881 */
1882
1883static int
1884nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Trond Myklebust02a913a2005-10-18 14:20:17 -07001885 int flags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886{
Trond Myklebustad389da2007-06-05 12:30:00 -04001887 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001888 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001889 .dentry = dentry,
1890 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 struct nfs4_state *state;
1892 struct rpc_cred *cred;
1893 int status = 0;
1894
David Howells1f163412006-08-22 20:06:11 -04001895 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 if (IS_ERR(cred)) {
1897 status = PTR_ERR(cred);
1898 goto out;
1899 }
Trond Myklebustad389da2007-06-05 12:30:00 -04001900 state = nfs4_do_open(dir, &path, flags, sattr, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 put_rpccred(cred);
Trond Myklebustd4d9cdc2007-10-02 18:38:53 -04001902 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 if (IS_ERR(state)) {
1904 status = PTR_ERR(state);
1905 goto out;
1906 }
Trond Myklebustd4d9cdc2007-10-02 18:38:53 -04001907 d_add(dentry, igrab(state->inode));
Trond Myklebustd75340c2007-10-01 21:42:01 -04001908 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 if (flags & O_EXCL) {
1910 struct nfs_fattr fattr;
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001911 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001912 if (status == 0)
Trond Myklebust65e43082005-08-16 11:49:44 -04001913 nfs_setattr_update_inode(state->inode, sattr);
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001914 nfs_post_op_update_inode(state->inode, &fattr);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001915 }
Trond Myklebustad389da2007-06-05 12:30:00 -04001916 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001917 status = nfs4_intent_set_file(nd, &path, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001918 else
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001919 nfs4_close_sync(&path, state, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920out:
1921 return status;
1922}
1923
1924static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1925{
Trond Myklebust16e42952005-10-27 22:12:44 -04001926 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001927 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928 .fh = NFS_FH(dir),
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001929 .name.len = name->len,
1930 .name.name = name->name,
Trond Myklebust16e42952005-10-27 22:12:44 -04001931 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001933 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04001934 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04001935 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1938 .rpc_argp = &args,
1939 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 };
1941 int status;
1942
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001943 nfs_fattr_init(&res.dir_attr);
Trond Myklebust16e42952005-10-27 22:12:44 -04001944 status = rpc_call_sync(server->client, &msg, 0);
1945 if (status == 0) {
1946 update_changeattr(dir, &res.cinfo);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001947 nfs_post_op_update_inode(dir, &res.dir_attr);
Trond Myklebust16e42952005-10-27 22:12:44 -04001948 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 return status;
1950}
1951
1952static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1953{
1954 struct nfs4_exception exception = { };
1955 int err;
1956 do {
1957 err = nfs4_handle_exception(NFS_SERVER(dir),
1958 _nfs4_proc_remove(dir, name),
1959 &exception);
1960 } while (exception.retry);
1961 return err;
1962}
1963
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001964static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001966 struct nfs_server *server = NFS_SERVER(dir);
1967 struct nfs_removeargs *args = msg->rpc_argp;
1968 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001970 args->bitmask = server->attr_bitmask;
1971 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973}
1974
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001975static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001977 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1978
1979 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1980 return 0;
1981 update_changeattr(dir, &res->cinfo);
1982 nfs_post_op_update_inode(dir, &res->dir_attr);
1983 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984}
1985
1986static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1987 struct inode *new_dir, struct qstr *new_name)
1988{
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001989 struct nfs_server *server = NFS_SERVER(old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 struct nfs4_rename_arg arg = {
1991 .old_dir = NFS_FH(old_dir),
1992 .new_dir = NFS_FH(new_dir),
1993 .old_name = old_name,
1994 .new_name = new_name,
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001995 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 };
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001997 struct nfs_fattr old_fattr, new_fattr;
1998 struct nfs4_rename_res res = {
1999 .server = server,
2000 .old_fattr = &old_fattr,
2001 .new_fattr = &new_fattr,
2002 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2005 .rpc_argp = &arg,
2006 .rpc_resp = &res,
2007 };
2008 int status;
2009
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002010 nfs_fattr_init(res.old_fattr);
2011 nfs_fattr_init(res.new_fattr);
2012 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013
2014 if (!status) {
2015 update_changeattr(old_dir, &res.old_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002016 nfs_post_op_update_inode(old_dir, res.old_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 update_changeattr(new_dir, &res.new_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002018 nfs_post_op_update_inode(new_dir, res.new_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019 }
2020 return status;
2021}
2022
2023static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2024 struct inode *new_dir, struct qstr *new_name)
2025{
2026 struct nfs4_exception exception = { };
2027 int err;
2028 do {
2029 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2030 _nfs4_proc_rename(old_dir, old_name,
2031 new_dir, new_name),
2032 &exception);
2033 } while (exception.retry);
2034 return err;
2035}
2036
2037static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2038{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002039 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 struct nfs4_link_arg arg = {
2041 .fh = NFS_FH(inode),
2042 .dir_fh = NFS_FH(dir),
2043 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002044 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002046 struct nfs_fattr fattr, dir_attr;
2047 struct nfs4_link_res res = {
2048 .server = server,
2049 .fattr = &fattr,
2050 .dir_attr = &dir_attr,
2051 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 struct rpc_message msg = {
2053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2054 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002055 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 };
2057 int status;
2058
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002059 nfs_fattr_init(res.fattr);
2060 nfs_fattr_init(res.dir_attr);
2061 status = rpc_call_sync(server->client, &msg, 0);
2062 if (!status) {
2063 update_changeattr(dir, &res.cinfo);
2064 nfs_post_op_update_inode(dir, res.dir_attr);
Trond Myklebust73a3d072006-05-25 01:40:47 -04002065 nfs_post_op_update_inode(inode, res.fattr);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002066 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067
2068 return status;
2069}
2070
2071static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2072{
2073 struct nfs4_exception exception = { };
2074 int err;
2075 do {
2076 err = nfs4_handle_exception(NFS_SERVER(inode),
2077 _nfs4_proc_link(inode, dir, name),
2078 &exception);
2079 } while (exception.retry);
2080 return err;
2081}
2082
Chuck Lever4f390c12006-08-22 20:06:22 -04002083static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002084 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085{
2086 struct nfs_server *server = NFS_SERVER(dir);
Chuck Lever4f390c12006-08-22 20:06:22 -04002087 struct nfs_fh fhandle;
2088 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 struct nfs4_create_arg arg = {
2090 .dir_fh = NFS_FH(dir),
2091 .server = server,
Chuck Lever4f390c12006-08-22 20:06:22 -04002092 .name = &dentry->d_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 .attrs = sattr,
2094 .ftype = NF4LNK,
2095 .bitmask = server->attr_bitmask,
2096 };
2097 struct nfs4_create_res res = {
2098 .server = server,
Chuck Lever4f390c12006-08-22 20:06:22 -04002099 .fh = &fhandle,
2100 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002101 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 };
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2105 .rpc_argp = &arg,
2106 .rpc_resp = &res,
2107 };
2108 int status;
2109
Chuck Lever94a6d752006-08-22 20:06:23 -04002110 if (len > NFS4_MAXPATHLEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 return -ENAMETOOLONG;
Chuck Lever4f390c12006-08-22 20:06:22 -04002112
Chuck Lever94a6d752006-08-22 20:06:23 -04002113 arg.u.symlink.pages = &page;
2114 arg.u.symlink.len = len;
Chuck Lever4f390c12006-08-22 20:06:22 -04002115 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002116 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117
2118 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Chuck Lever4f390c12006-08-22 20:06:22 -04002119 if (!status) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 update_changeattr(dir, &res.dir_cinfo);
Chuck Lever4f390c12006-08-22 20:06:22 -04002121 nfs_post_op_update_inode(dir, res.dir_fattr);
2122 status = nfs_instantiate(dentry, &fhandle, &fattr);
2123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 return status;
2125}
2126
Chuck Lever4f390c12006-08-22 20:06:22 -04002127static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002128 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129{
2130 struct nfs4_exception exception = { };
2131 int err;
2132 do {
2133 err = nfs4_handle_exception(NFS_SERVER(dir),
Chuck Lever94a6d752006-08-22 20:06:23 -04002134 _nfs4_proc_symlink(dir, dentry, page,
2135 len, sattr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 &exception);
2137 } while (exception.retry);
2138 return err;
2139}
2140
2141static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2142 struct iattr *sattr)
2143{
2144 struct nfs_server *server = NFS_SERVER(dir);
2145 struct nfs_fh fhandle;
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002146 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 struct nfs4_create_arg arg = {
2148 .dir_fh = NFS_FH(dir),
2149 .server = server,
2150 .name = &dentry->d_name,
2151 .attrs = sattr,
2152 .ftype = NF4DIR,
2153 .bitmask = server->attr_bitmask,
2154 };
2155 struct nfs4_create_res res = {
2156 .server = server,
2157 .fh = &fhandle,
2158 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002159 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 };
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2163 .rpc_argp = &arg,
2164 .rpc_resp = &res,
2165 };
2166 int status;
2167
Trond Myklebust0e574af2005-10-27 22:12:38 -04002168 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002169 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170
2171 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2172 if (!status) {
2173 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002174 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 status = nfs_instantiate(dentry, &fhandle, &fattr);
2176 }
2177 return status;
2178}
2179
2180static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2181 struct iattr *sattr)
2182{
2183 struct nfs4_exception exception = { };
2184 int err;
2185 do {
2186 err = nfs4_handle_exception(NFS_SERVER(dir),
2187 _nfs4_proc_mkdir(dir, dentry, sattr),
2188 &exception);
2189 } while (exception.retry);
2190 return err;
2191}
2192
2193static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2194 u64 cookie, struct page *page, unsigned int count, int plus)
2195{
2196 struct inode *dir = dentry->d_inode;
2197 struct nfs4_readdir_arg args = {
2198 .fh = NFS_FH(dir),
2199 .pages = &page,
2200 .pgbase = 0,
2201 .count = count,
2202 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2203 };
2204 struct nfs4_readdir_res res;
2205 struct rpc_message msg = {
2206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2207 .rpc_argp = &args,
2208 .rpc_resp = &res,
2209 .rpc_cred = cred,
2210 };
2211 int status;
2212
Trond Myklebusteadf4592005-06-22 17:16:39 +00002213 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2214 dentry->d_parent->d_name.name,
2215 dentry->d_name.name,
2216 (unsigned long long)cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2218 res.pgbase = args.pgbase;
2219 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2220 if (status == 0)
2221 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustc4812992007-09-28 17:11:45 -04002222
2223 nfs_invalidate_atime(dir);
2224
Trond Myklebusteadf4592005-06-22 17:16:39 +00002225 dprintk("%s: returns %d\n", __FUNCTION__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226 return status;
2227}
2228
2229static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2230 u64 cookie, struct page *page, unsigned int count, int plus)
2231{
2232 struct nfs4_exception exception = { };
2233 int err;
2234 do {
2235 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2236 _nfs4_proc_readdir(dentry, cred, cookie,
2237 page, count, plus),
2238 &exception);
2239 } while (exception.retry);
2240 return err;
2241}
2242
2243static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2244 struct iattr *sattr, dev_t rdev)
2245{
2246 struct nfs_server *server = NFS_SERVER(dir);
2247 struct nfs_fh fh;
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002248 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249 struct nfs4_create_arg arg = {
2250 .dir_fh = NFS_FH(dir),
2251 .server = server,
2252 .name = &dentry->d_name,
2253 .attrs = sattr,
2254 .bitmask = server->attr_bitmask,
2255 };
2256 struct nfs4_create_res res = {
2257 .server = server,
2258 .fh = &fh,
2259 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002260 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 };
2262 struct rpc_message msg = {
2263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2264 .rpc_argp = &arg,
2265 .rpc_resp = &res,
2266 };
2267 int status;
2268 int mode = sattr->ia_mode;
2269
Trond Myklebust0e574af2005-10-27 22:12:38 -04002270 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002271 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272
2273 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2274 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2275 if (S_ISFIFO(mode))
2276 arg.ftype = NF4FIFO;
2277 else if (S_ISBLK(mode)) {
2278 arg.ftype = NF4BLK;
2279 arg.u.device.specdata1 = MAJOR(rdev);
2280 arg.u.device.specdata2 = MINOR(rdev);
2281 }
2282 else if (S_ISCHR(mode)) {
2283 arg.ftype = NF4CHR;
2284 arg.u.device.specdata1 = MAJOR(rdev);
2285 arg.u.device.specdata2 = MINOR(rdev);
2286 }
2287 else
2288 arg.ftype = NF4SOCK;
2289
2290 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2291 if (status == 0) {
2292 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002293 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294 status = nfs_instantiate(dentry, &fh, &fattr);
2295 }
2296 return status;
2297}
2298
2299static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2300 struct iattr *sattr, dev_t rdev)
2301{
2302 struct nfs4_exception exception = { };
2303 int err;
2304 do {
2305 err = nfs4_handle_exception(NFS_SERVER(dir),
2306 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2307 &exception);
2308 } while (exception.retry);
2309 return err;
2310}
2311
2312static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2313 struct nfs_fsstat *fsstat)
2314{
2315 struct nfs4_statfs_arg args = {
2316 .fh = fhandle,
2317 .bitmask = server->attr_bitmask,
2318 };
2319 struct rpc_message msg = {
2320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2321 .rpc_argp = &args,
2322 .rpc_resp = fsstat,
2323 };
2324
Trond Myklebust0e574af2005-10-27 22:12:38 -04002325 nfs_fattr_init(fsstat->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 return rpc_call_sync(server->client, &msg, 0);
2327}
2328
2329static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2330{
2331 struct nfs4_exception exception = { };
2332 int err;
2333 do {
2334 err = nfs4_handle_exception(server,
2335 _nfs4_proc_statfs(server, fhandle, fsstat),
2336 &exception);
2337 } while (exception.retry);
2338 return err;
2339}
2340
2341static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2342 struct nfs_fsinfo *fsinfo)
2343{
2344 struct nfs4_fsinfo_arg args = {
2345 .fh = fhandle,
2346 .bitmask = server->attr_bitmask,
2347 };
2348 struct rpc_message msg = {
2349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2350 .rpc_argp = &args,
2351 .rpc_resp = fsinfo,
2352 };
2353
2354 return rpc_call_sync(server->client, &msg, 0);
2355}
2356
2357static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2358{
2359 struct nfs4_exception exception = { };
2360 int err;
2361
2362 do {
2363 err = nfs4_handle_exception(server,
2364 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2365 &exception);
2366 } while (exception.retry);
2367 return err;
2368}
2369
2370static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2371{
Trond Myklebust0e574af2005-10-27 22:12:38 -04002372 nfs_fattr_init(fsinfo->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2374}
2375
2376static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2377 struct nfs_pathconf *pathconf)
2378{
2379 struct nfs4_pathconf_arg args = {
2380 .fh = fhandle,
2381 .bitmask = server->attr_bitmask,
2382 };
2383 struct rpc_message msg = {
2384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2385 .rpc_argp = &args,
2386 .rpc_resp = pathconf,
2387 };
2388
2389 /* None of the pathconf attributes are mandatory to implement */
2390 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2391 memset(pathconf, 0, sizeof(*pathconf));
2392 return 0;
2393 }
2394
Trond Myklebust0e574af2005-10-27 22:12:38 -04002395 nfs_fattr_init(pathconf->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 return rpc_call_sync(server->client, &msg, 0);
2397}
2398
2399static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_pathconf *pathconf)
2401{
2402 struct nfs4_exception exception = { };
2403 int err;
2404
2405 do {
2406 err = nfs4_handle_exception(server,
2407 _nfs4_proc_pathconf(server, fhandle, pathconf),
2408 &exception);
2409 } while (exception.retry);
2410 return err;
2411}
2412
Trond Myklebustec06c092006-03-20 13:44:27 -05002413static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414{
Trond Myklebustec06c092006-03-20 13:44:27 -05002415 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416
Trond Myklebustec06c092006-03-20 13:44:27 -05002417 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 rpc_restart_call(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05002419 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 }
Trond Myklebust8850df92007-09-28 17:20:07 -04002421
2422 nfs_invalidate_atime(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 if (task->tk_status > 0)
Trond Myklebustec06c092006-03-20 13:44:27 -05002424 renew_lease(server, data->timestamp);
2425 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426}
2427
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002428static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 data->timestamp = jiffies;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002431 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432}
2433
Trond Myklebust788e7a82006-03-20 13:44:27 -05002434static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 struct inode *inode = data->inode;
2437
2438 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2439 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002440 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002442 if (task->tk_status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443 renew_lease(NFS_SERVER(inode), data->timestamp);
Trond Myklebust70ca8852007-09-30 15:21:24 -04002444 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002445 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05002446 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447}
2448
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002449static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450{
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002451 struct nfs_server *server = NFS_SERVER(data->inode);
2452
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002453 data->args.bitmask = server->attr_bitmask;
2454 data->res.server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 data->timestamp = jiffies;
2456
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002457 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458}
2459
Trond Myklebust788e7a82006-03-20 13:44:27 -05002460static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462 struct inode *inode = data->inode;
2463
2464 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2465 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002466 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467 }
Trond Myklebust9e08a3c2007-10-08 14:10:31 -04002468 nfs_refresh_inode(inode, data->res.fattr);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002469 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470}
2471
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002472static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473{
Trond Myklebust788e7a82006-03-20 13:44:27 -05002474 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002476 data->args.bitmask = server->attr_bitmask;
2477 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002478 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479}
2480
2481/*
2482 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2483 * standalone procedure for queueing an asynchronous RENEW.
2484 */
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002485static void nfs4_renew_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486{
David Howellsadfa6f92006-08-22 20:06:08 -04002487 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002488 unsigned long timestamp = (unsigned long)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489
2490 if (task->tk_status < 0) {
2491 switch (task->tk_status) {
2492 case -NFS4ERR_STALE_CLIENTID:
2493 case -NFS4ERR_EXPIRED:
2494 case -NFS4ERR_CB_PATH_DOWN:
2495 nfs4_schedule_state_recovery(clp);
2496 }
2497 return;
2498 }
2499 spin_lock(&clp->cl_lock);
2500 if (time_before(clp->cl_last_renewal,timestamp))
2501 clp->cl_last_renewal = timestamp;
2502 spin_unlock(&clp->cl_lock);
2503}
2504
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002505static const struct rpc_call_ops nfs4_renew_ops = {
2506 .rpc_call_done = nfs4_renew_done,
2507};
2508
David Howellsadfa6f92006-08-22 20:06:08 -04002509int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510{
2511 struct rpc_message msg = {
2512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2513 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002514 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515 };
2516
2517 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002518 &nfs4_renew_ops, (void *)jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519}
2520
David Howellsadfa6f92006-08-22 20:06:08 -04002521int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522{
2523 struct rpc_message msg = {
2524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2525 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002526 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527 };
2528 unsigned long now = jiffies;
2529 int status;
2530
2531 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2532 if (status < 0)
2533 return status;
2534 spin_lock(&clp->cl_lock);
2535 if (time_before(clp->cl_last_renewal,now))
2536 clp->cl_last_renewal = now;
2537 spin_unlock(&clp->cl_lock);
2538 return 0;
2539}
2540
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002541static inline int nfs4_server_supports_acls(struct nfs_server *server)
2542{
2543 return (server->caps & NFS_CAP_ACLS)
2544 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2545 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2546}
2547
2548/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2549 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2550 * the stack.
2551 */
2552#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2553
2554static void buf_to_pages(const void *buf, size_t buflen,
2555 struct page **pages, unsigned int *pgbase)
2556{
2557 const void *p = buf;
2558
2559 *pgbase = offset_in_page(buf);
2560 p -= *pgbase;
2561 while (p < buf + buflen) {
2562 *(pages++) = virt_to_page(p);
2563 p += PAGE_CACHE_SIZE;
2564 }
2565}
2566
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002567struct nfs4_cached_acl {
2568 int cached;
2569 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00002570 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002571};
2572
2573static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002574{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002575 struct nfs_inode *nfsi = NFS_I(inode);
2576
2577 spin_lock(&inode->i_lock);
2578 kfree(nfsi->nfs4_acl);
2579 nfsi->nfs4_acl = acl;
2580 spin_unlock(&inode->i_lock);
2581}
2582
2583static void nfs4_zap_acl_attr(struct inode *inode)
2584{
2585 nfs4_set_cached_acl(inode, NULL);
2586}
2587
2588static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2589{
2590 struct nfs_inode *nfsi = NFS_I(inode);
2591 struct nfs4_cached_acl *acl;
2592 int ret = -ENOENT;
2593
2594 spin_lock(&inode->i_lock);
2595 acl = nfsi->nfs4_acl;
2596 if (acl == NULL)
2597 goto out;
2598 if (buf == NULL) /* user is just asking for length */
2599 goto out_len;
2600 if (acl->cached == 0)
2601 goto out;
2602 ret = -ERANGE; /* see getxattr(2) man page */
2603 if (acl->len > buflen)
2604 goto out;
2605 memcpy(buf, acl->data, acl->len);
2606out_len:
2607 ret = acl->len;
2608out:
2609 spin_unlock(&inode->i_lock);
2610 return ret;
2611}
2612
2613static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2614{
2615 struct nfs4_cached_acl *acl;
2616
2617 if (buf && acl_len <= PAGE_SIZE) {
2618 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2619 if (acl == NULL)
2620 goto out;
2621 acl->cached = 1;
2622 memcpy(acl->data, buf, acl_len);
2623 } else {
2624 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2625 if (acl == NULL)
2626 goto out;
2627 acl->cached = 0;
2628 }
2629 acl->len = acl_len;
2630out:
2631 nfs4_set_cached_acl(inode, acl);
2632}
2633
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002634static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002635{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002636 struct page *pages[NFS4ACL_MAXPAGES];
2637 struct nfs_getaclargs args = {
2638 .fh = NFS_FH(inode),
2639 .acl_pages = pages,
2640 .acl_len = buflen,
2641 };
2642 size_t resp_len = buflen;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002643 void *resp_buf;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002644 struct rpc_message msg = {
2645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2646 .rpc_argp = &args,
2647 .rpc_resp = &resp_len,
2648 };
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002649 struct page *localpage = NULL;
2650 int ret;
2651
2652 if (buflen < PAGE_SIZE) {
2653 /* As long as we're doing a round trip to the server anyway,
2654 * let's be prepared for a page of acl data. */
2655 localpage = alloc_page(GFP_KERNEL);
2656 resp_buf = page_address(localpage);
2657 if (localpage == NULL)
2658 return -ENOMEM;
2659 args.acl_pages[0] = localpage;
2660 args.acl_pgbase = 0;
J. Bruce Fields1d95db82005-10-13 16:54:32 -04002661 resp_len = args.acl_len = PAGE_SIZE;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002662 } else {
2663 resp_buf = buf;
2664 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2665 }
2666 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2667 if (ret)
2668 goto out_free;
2669 if (resp_len > args.acl_len)
2670 nfs4_write_cached_acl(inode, NULL, resp_len);
2671 else
2672 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2673 if (buf) {
2674 ret = -ERANGE;
2675 if (resp_len > buflen)
2676 goto out_free;
2677 if (localpage)
2678 memcpy(buf, resp_buf, resp_len);
2679 }
2680 ret = resp_len;
2681out_free:
2682 if (localpage)
2683 __free_page(localpage);
2684 return ret;
2685}
2686
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002687static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2688{
2689 struct nfs4_exception exception = { };
2690 ssize_t ret;
2691 do {
2692 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2693 if (ret >= 0)
2694 break;
2695 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2696 } while (exception.retry);
2697 return ret;
2698}
2699
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002700static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2701{
2702 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002703 int ret;
2704
2705 if (!nfs4_server_supports_acls(server))
2706 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002707 ret = nfs_revalidate_inode(server, inode);
2708 if (ret < 0)
2709 return ret;
2710 ret = nfs4_read_cached_acl(inode, buf, buflen);
2711 if (ret != -ENOENT)
2712 return ret;
2713 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002714}
2715
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002716static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002717{
2718 struct nfs_server *server = NFS_SERVER(inode);
2719 struct page *pages[NFS4ACL_MAXPAGES];
2720 struct nfs_setaclargs arg = {
2721 .fh = NFS_FH(inode),
2722 .acl_pages = pages,
2723 .acl_len = buflen,
2724 };
2725 struct rpc_message msg = {
2726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2727 .rpc_argp = &arg,
2728 .rpc_resp = NULL,
2729 };
2730 int ret;
2731
2732 if (!nfs4_server_supports_acls(server))
2733 return -EOPNOTSUPP;
Trond Myklebust642ac542005-10-18 14:20:19 -07002734 nfs_inode_return_delegation(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002735 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
David Howells1f163412006-08-22 20:06:11 -04002736 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
J. Bruce Fields08efa202007-05-01 10:56:25 -04002737 nfs_zap_caches(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002738 return ret;
2739}
2740
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002741static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2742{
2743 struct nfs4_exception exception = { };
2744 int err;
2745 do {
2746 err = nfs4_handle_exception(NFS_SERVER(inode),
2747 __nfs4_proc_set_acl(inode, buf, buflen),
2748 &exception);
2749 } while (exception.retry);
2750 return err;
2751}
2752
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753static int
Trond Myklebustfaf5f492005-10-18 14:20:15 -07002754nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755{
David Howells7539bba2006-08-22 20:06:09 -04002756 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757
2758 if (!clp || task->tk_status >= 0)
2759 return 0;
2760 switch(task->tk_status) {
2761 case -NFS4ERR_STALE_CLIENTID:
2762 case -NFS4ERR_STALE_STATEID:
2763 case -NFS4ERR_EXPIRED:
2764 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2765 nfs4_schedule_state_recovery(clp);
Trond Myklebust433fbe42006-01-03 09:55:22 +01002766 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 rpc_wake_up_task(task);
2768 task->tk_status = 0;
2769 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002770 case -NFS4ERR_DELAY:
Chuck Lever006ea732006-03-20 13:44:14 -05002771 nfs_inc_server_stats((struct nfs_server *) server,
2772 NFSIOS_DELAY);
2773 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2775 task->tk_status = 0;
2776 return -EAGAIN;
2777 case -NFS4ERR_OLD_STATEID:
2778 task->tk_status = 0;
2779 return -EAGAIN;
2780 }
2781 task->tk_status = nfs4_map_errors(task->tk_status);
2782 return 0;
2783}
2784
Matthew Wilcox150030b2007-12-06 16:24:39 -05002785static int nfs4_wait_bit_killable(void *word)
Trond Myklebust433fbe42006-01-03 09:55:22 +01002786{
Matthew Wilcox150030b2007-12-06 16:24:39 -05002787 if (fatal_signal_pending(current))
Trond Myklebust433fbe42006-01-03 09:55:22 +01002788 return -ERESTARTSYS;
2789 schedule();
2790 return 0;
2791}
2792
David Howellsadfa6f92006-08-22 20:06:08 -04002793static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002794{
Trond Myklebust433fbe42006-01-03 09:55:22 +01002795 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796
2797 might_sleep();
2798
Trond Myklebuste1485822006-12-13 16:43:13 -05002799 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2800
Trond Myklebust433fbe42006-01-03 09:55:22 +01002801 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
Matthew Wilcox150030b2007-12-06 16:24:39 -05002802 nfs4_wait_bit_killable, TASK_KILLABLE);
Trond Myklebuste1485822006-12-13 16:43:13 -05002803
2804 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002805 return res;
2806}
2807
2808static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2809{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002810 int res = 0;
2811
2812 might_sleep();
2813
2814 if (*timeout <= 0)
2815 *timeout = NFS4_POLL_RETRY_MIN;
2816 if (*timeout > NFS4_POLL_RETRY_MAX)
2817 *timeout = NFS4_POLL_RETRY_MAX;
Matthew Wilcox150030b2007-12-06 16:24:39 -05002818 schedule_timeout_killable(*timeout);
2819 if (fatal_signal_pending(current))
2820 res = -ERESTARTSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821 *timeout <<= 1;
2822 return res;
2823}
2824
2825/* This is the error handling routine for processes that are allowed
2826 * to sleep.
2827 */
Trond Myklebust10afec92007-05-14 17:16:04 -04002828static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829{
David Howells7539bba2006-08-22 20:06:09 -04002830 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 int ret = errorcode;
2832
2833 exception->retry = 0;
2834 switch(errorcode) {
2835 case 0:
2836 return 0;
2837 case -NFS4ERR_STALE_CLIENTID:
2838 case -NFS4ERR_STALE_STATEID:
2839 case -NFS4ERR_EXPIRED:
Trond Myklebust433fbe42006-01-03 09:55:22 +01002840 nfs4_schedule_state_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841 ret = nfs4_wait_clnt_recover(server->client, clp);
2842 if (ret == 0)
2843 exception->retry = 1;
2844 break;
Trond Myklebustc5149832006-09-15 08:25:04 -04002845 case -NFS4ERR_FILE_OPEN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002846 case -NFS4ERR_GRACE:
2847 case -NFS4ERR_DELAY:
2848 ret = nfs4_delay(server->client, &exception->timeout);
Trond Myklebust2c566172005-11-04 15:33:50 -05002849 if (ret != 0)
2850 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002851 case -NFS4ERR_OLD_STATEID:
Trond Myklebust2c566172005-11-04 15:33:50 -05002852 exception->retry = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853 }
2854 /* We failed to handle the error */
2855 return nfs4_map_errors(ret);
2856}
2857
David Howellsadfa6f92006-08-22 20:06:08 -04002858int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859{
2860 nfs4_verifier sc_verifier;
2861 struct nfs4_setclientid setclientid = {
2862 .sc_verifier = &sc_verifier,
2863 .sc_prog = program,
2864 };
2865 struct rpc_message msg = {
2866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2867 .rpc_argp = &setclientid,
2868 .rpc_resp = clp,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002869 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870 };
Al Virobc4785c2006-10-19 23:28:51 -07002871 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872 int loop = 0;
2873 int status;
2874
Al Virobc4785c2006-10-19 23:28:51 -07002875 p = (__be32*)sc_verifier.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2877 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2878
2879 for(;;) {
2880 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
Trond Myklebust69dd7162007-12-14 14:56:07 -05002881 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
Chuck Leverd4d3c502007-12-10 14:57:09 -05002882 clp->cl_ipaddr,
2883 rpc_peeraddr2str(clp->cl_rpcclient,
2884 RPC_DISPLAY_ADDR),
Trond Myklebust69dd7162007-12-14 14:56:07 -05002885 rpc_peeraddr2str(clp->cl_rpcclient,
2886 RPC_DISPLAY_PROTO),
Trond Myklebust286d7d62006-01-03 09:55:26 +01002887 cred->cr_ops->cr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002888 clp->cl_id_uniquifier);
2889 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
Chuck Leverd4d3c502007-12-10 14:57:09 -05002890 sizeof(setclientid.sc_netid),
2891 rpc_peeraddr2str(clp->cl_rpcclient,
2892 RPC_DISPLAY_NETID));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05002894 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895 clp->cl_ipaddr, port >> 8, port & 255);
2896
2897 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2898 if (status != -NFS4ERR_CLID_INUSE)
2899 break;
2900 if (signalled())
2901 break;
2902 if (loop++ & 1)
2903 ssleep(clp->cl_lease_time + 1);
2904 else
2905 if (++clp->cl_id_uniquifier == 0)
2906 break;
2907 }
2908 return status;
2909}
2910
David Howellsadfa6f92006-08-22 20:06:08 -04002911static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912{
2913 struct nfs_fsinfo fsinfo;
2914 struct rpc_message msg = {
2915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2916 .rpc_argp = clp,
2917 .rpc_resp = &fsinfo,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002918 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 };
2920 unsigned long now;
2921 int status;
2922
2923 now = jiffies;
2924 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2925 if (status == 0) {
2926 spin_lock(&clp->cl_lock);
2927 clp->cl_lease_time = fsinfo.lease_time * HZ;
2928 clp->cl_last_renewal = now;
Trond Myklebust58d97142006-01-03 09:55:24 +01002929 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002930 spin_unlock(&clp->cl_lock);
2931 }
2932 return status;
2933}
2934
David Howellsadfa6f92006-08-22 20:06:08 -04002935int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Trond Myklebust51581f32006-03-20 13:44:47 -05002936{
2937 long timeout;
2938 int err;
2939 do {
2940 err = _nfs4_proc_setclientid_confirm(clp, cred);
2941 switch (err) {
2942 case 0:
2943 return err;
2944 case -NFS4ERR_RESOURCE:
2945 /* The IBM lawyers misread another document! */
2946 case -NFS4ERR_DELAY:
2947 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2948 }
2949 } while (err == 0);
2950 return err;
2951}
2952
Trond Myklebustfe650402006-01-03 09:55:18 +01002953struct nfs4_delegreturndata {
2954 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002955 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01002956 struct nfs_fh fh;
2957 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002958 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002959 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01002960 int rpc_status;
2961};
2962
Trond Myklebustfe650402006-01-03 09:55:18 +01002963static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2964{
2965 struct nfs4_delegreturndata *data = calldata;
2966 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002967 if (data->rpc_status == 0)
Trond Myklebustfa178f22006-01-03 09:55:38 +01002968 renew_lease(data->res.server, data->timestamp);
Trond Myklebustfe650402006-01-03 09:55:18 +01002969}
2970
2971static void nfs4_delegreturn_release(void *calldata)
2972{
Trond Myklebustfe650402006-01-03 09:55:18 +01002973 kfree(calldata);
2974}
2975
Jesper Juhlc8d149f2006-03-20 13:44:07 -05002976static const struct rpc_call_ops nfs4_delegreturn_ops = {
Trond Myklebustfe650402006-01-03 09:55:18 +01002977 .rpc_call_done = nfs4_delegreturn_done,
2978 .rpc_release = nfs4_delegreturn_release,
2979};
2980
Trond Myklebuste6f81072008-01-24 18:14:34 -05002981static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01002982{
2983 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002984 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01002985 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002986 struct rpc_message msg = {
2987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2988 .rpc_cred = cred,
2989 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002990 struct rpc_task_setup task_setup_data = {
2991 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002992 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002993 .callback_ops = &nfs4_delegreturn_ops,
2994 .flags = RPC_TASK_ASYNC,
2995 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05002996 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01002997
2998 data = kmalloc(sizeof(*data), GFP_KERNEL);
2999 if (data == NULL)
3000 return -ENOMEM;
3001 data->args.fhandle = &data->fh;
3002 data->args.stateid = &data->stateid;
Trond Myklebustfa178f22006-01-03 09:55:38 +01003003 data->args.bitmask = server->attr_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01003004 nfs_copy_fh(&data->fh, NFS_FH(inode));
3005 memcpy(&data->stateid, stateid, sizeof(data->stateid));
Trond Myklebustfa178f22006-01-03 09:55:38 +01003006 data->res.fattr = &data->fattr;
3007 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003008 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01003009 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01003010 data->rpc_status = 0;
3011
Trond Myklebustc970aa82007-07-14 15:39:59 -04003012 task_setup_data.callback_data = data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003013 msg.rpc_argp = &data->args,
3014 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003015 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003016 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01003017 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05003018 if (!issync)
3019 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01003020 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05003021 if (status != 0)
3022 goto out;
3023 status = data->rpc_status;
3024 if (status != 0)
3025 goto out;
3026 nfs_refresh_inode(inode, &data->fattr);
3027out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003028 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01003029 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030}
3031
Trond Myklebuste6f81072008-01-24 18:14:34 -05003032int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003033{
3034 struct nfs_server *server = NFS_SERVER(inode);
3035 struct nfs4_exception exception = { };
3036 int err;
3037 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05003038 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003039 switch (err) {
3040 case -NFS4ERR_STALE_STATEID:
3041 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003042 case 0:
3043 return 0;
3044 }
3045 err = nfs4_handle_exception(server, err, &exception);
3046 } while (exception.retry);
3047 return err;
3048}
3049
3050#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3051#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3052
3053/*
3054 * sleep, with exponential backoff, and retry the LOCK operation.
3055 */
3056static unsigned long
3057nfs4_set_lock_task_retry(unsigned long timeout)
3058{
Matthew Wilcox150030b2007-12-06 16:24:39 -05003059 schedule_timeout_killable(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003060 timeout <<= 1;
3061 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3062 return NFS4_LOCK_MAXTIMEOUT;
3063 return timeout;
3064}
3065
Linus Torvalds1da177e2005-04-16 15:20:36 -07003066static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3067{
3068 struct inode *inode = state->inode;
3069 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04003070 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003071 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003072 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003073 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003074 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003075 struct nfs_lockt_res res = {
3076 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003077 };
3078 struct rpc_message msg = {
3079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3080 .rpc_argp = &arg,
3081 .rpc_resp = &res,
3082 .rpc_cred = state->owner->so_cred,
3083 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084 struct nfs4_lock_state *lsp;
3085 int status;
3086
3087 down_read(&clp->cl_sem);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003088 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003089 status = nfs4_set_lock_state(state, request);
3090 if (status != 0)
3091 goto out;
3092 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04003093 arg.lock_owner.id = lsp->ls_id.id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003094 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003095 switch (status) {
3096 case 0:
3097 request->fl_type = F_UNLCK;
3098 break;
3099 case -NFS4ERR_DENIED:
3100 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003101 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05003102 request->fl_ops->fl_release_private(request);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003103out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104 up_read(&clp->cl_sem);
3105 return status;
3106}
3107
3108static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3109{
3110 struct nfs4_exception exception = { };
3111 int err;
3112
3113 do {
3114 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3115 _nfs4_proc_getlk(state, cmd, request),
3116 &exception);
3117 } while (exception.retry);
3118 return err;
3119}
3120
3121static int do_vfs_lock(struct file *file, struct file_lock *fl)
3122{
3123 int res = 0;
3124 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3125 case FL_POSIX:
3126 res = posix_lock_file_wait(file, fl);
3127 break;
3128 case FL_FLOCK:
3129 res = flock_lock_file_wait(file, fl);
3130 break;
3131 default:
3132 BUG();
3133 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134 return res;
3135}
3136
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003137struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003138 struct nfs_locku_args arg;
3139 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003140 struct nfs4_lock_state *lsp;
3141 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003142 struct file_lock fl;
3143 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003144 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003145};
3146
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003147static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3148 struct nfs_open_context *ctx,
3149 struct nfs4_lock_state *lsp,
3150 struct nfs_seqid *seqid)
3151{
3152 struct nfs4_unlockdata *p;
3153 struct inode *inode = lsp->ls_state->inode;
3154
3155 p = kmalloc(sizeof(*p), GFP_KERNEL);
3156 if (p == NULL)
3157 return NULL;
3158 p->arg.fh = NFS_FH(inode);
3159 p->arg.fl = &p->fl;
3160 p->arg.seqid = seqid;
3161 p->arg.stateid = &lsp->ls_stateid;
3162 p->lsp = lsp;
3163 atomic_inc(&lsp->ls_count);
3164 /* Ensure we don't close file until we're done freeing locks! */
3165 p->ctx = get_nfs_open_context(ctx);
3166 memcpy(&p->fl, fl, sizeof(p->fl));
3167 p->server = NFS_SERVER(inode);
3168 return p;
3169}
3170
Trond Myklebust06f814a2006-01-03 09:55:07 +01003171static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003172{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003173 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003174 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01003175 nfs4_put_lock_state(calldata->lsp);
3176 put_nfs_open_context(calldata->ctx);
3177 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003178}
3179
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003180static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003181{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003182 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003183
Trond Myklebust06f814a2006-01-03 09:55:07 +01003184 if (RPC_ASSASSINATED(task))
3185 return;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003186 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003187 switch (task->tk_status) {
3188 case 0:
3189 memcpy(calldata->lsp->ls_stateid.data,
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003190 calldata->res.stateid.data,
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003191 sizeof(calldata->lsp->ls_stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +01003192 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003193 break;
3194 case -NFS4ERR_STALE_STATEID:
3195 case -NFS4ERR_EXPIRED:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003196 break;
3197 default:
Trond Myklebusta6a352e2006-12-13 16:43:06 -05003198 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003199 rpc_restart_call(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003200 }
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003201}
3202
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003203static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003204{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003205 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003207 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003208 return;
3209 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003210 /* Note: exit _without_ running nfs4_locku_done */
3211 task->tk_action = NULL;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003212 return;
3213 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003214 calldata->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003215 rpc_call_start(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216}
3217
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003218static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003219 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003220 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01003221 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003222};
3223
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003224static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3225 struct nfs_open_context *ctx,
3226 struct nfs4_lock_state *lsp,
3227 struct nfs_seqid *seqid)
3228{
3229 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003230 struct rpc_message msg = {
3231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3232 .rpc_cred = ctx->cred,
3233 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003234 struct rpc_task_setup task_setup_data = {
3235 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04003236 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003237 .callback_ops = &nfs4_locku_ops,
3238 .flags = RPC_TASK_ASYNC,
3239 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003240
Frank Filz137d6ac2007-07-09 15:32:29 -07003241 /* Ensure this is an unlock - when canceling a lock, the
3242 * canceled lock is passed in, and it won't be an unlock.
3243 */
3244 fl->fl_type = F_UNLCK;
3245
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003246 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3247 if (data == NULL) {
3248 nfs_free_seqid(seqid);
3249 return ERR_PTR(-ENOMEM);
3250 }
3251
Trond Myklebust5138fde2007-07-14 15:40:01 -04003252 msg.rpc_argp = &data->arg,
3253 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003254 task_setup_data.callback_data = data;
3255 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003256}
3257
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3259{
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003260 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003261 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01003262 struct rpc_task *task;
3263 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264
Trond Myklebust9b073572006-06-29 16:38:34 -04003265 status = nfs4_set_lock_state(state, request);
3266 /* Unlock _before_ we do the RPC call */
3267 request->fl_flags |= FL_EXISTS;
3268 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3269 goto out;
3270 if (status != 0)
3271 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003272 /* Is this a delegated lock? */
3273 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust9b073572006-06-29 16:38:34 -04003274 goto out;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003275 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003276 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
Trond Myklebust9b073572006-06-29 16:38:34 -04003277 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003278 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04003279 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003280 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003281 status = PTR_ERR(task);
3282 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04003283 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003284 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003285 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04003286out:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003287 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288}
3289
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003290struct nfs4_lockdata {
3291 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003292 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003293 struct nfs4_lock_state *lsp;
3294 struct nfs_open_context *ctx;
3295 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003296 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003297 int rpc_status;
3298 int cancelled;
3299};
3300
3301static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3302 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3303{
3304 struct nfs4_lockdata *p;
3305 struct inode *inode = lsp->ls_state->inode;
3306 struct nfs_server *server = NFS_SERVER(inode);
3307
3308 p = kzalloc(sizeof(*p), GFP_KERNEL);
3309 if (p == NULL)
3310 return NULL;
3311
3312 p->arg.fh = NFS_FH(inode);
3313 p->arg.fl = &p->fl;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003314 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3315 if (p->arg.open_seqid == NULL)
3316 goto out_free;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003317 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3318 if (p->arg.lock_seqid == NULL)
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003319 goto out_free_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003320 p->arg.lock_stateid = &lsp->ls_stateid;
David Howells7539bba2006-08-22 20:06:09 -04003321 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04003322 p->arg.lock_owner.id = lsp->ls_id.id;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003323 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;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003328out_free_seqid:
3329 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003330out_free:
3331 kfree(p);
3332 return NULL;
3333}
3334
3335static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3336{
3337 struct nfs4_lockdata *data = calldata;
3338 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003339
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003340 dprintk("%s: begin!\n", __FUNCTION__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003341 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3342 return;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003343 /* Do we need to do an open_to_lock_owner? */
3344 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
Trond Myklebuste6e21972008-01-02 16:27:16 -05003345 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3346 return;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003347 data->arg.open_stateid = &state->stateid;
3348 data->arg.new_lock_owner = 1;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003349 } else
3350 data->arg.new_lock_owner = 0;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003351 data->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003352 rpc_call_start(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003353 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3354}
3355
3356static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3357{
3358 struct nfs4_lockdata *data = calldata;
3359
3360 dprintk("%s: begin!\n", __FUNCTION__);
3361
3362 data->rpc_status = task->tk_status;
3363 if (RPC_ASSASSINATED(task))
3364 goto out;
3365 if (data->arg.new_lock_owner != 0) {
3366 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3367 if (data->rpc_status == 0)
3368 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3369 else
3370 goto out;
3371 }
3372 if (data->rpc_status == 0) {
3373 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3374 sizeof(data->lsp->ls_stateid.data));
3375 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
Trond Myklebust88be9f92007-06-05 10:42:27 -04003376 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003377 }
3378 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3379out:
3380 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3381}
3382
3383static void nfs4_lock_release(void *calldata)
3384{
3385 struct nfs4_lockdata *data = calldata;
3386
3387 dprintk("%s: begin!\n", __FUNCTION__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003388 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003389 if (data->cancelled != 0) {
3390 struct rpc_task *task;
3391 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3392 data->arg.lock_seqid);
3393 if (!IS_ERR(task))
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003394 rpc_put_task(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003395 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3396 } else
3397 nfs_free_seqid(data->arg.lock_seqid);
3398 nfs4_put_lock_state(data->lsp);
3399 put_nfs_open_context(data->ctx);
3400 kfree(data);
3401 dprintk("%s: done!\n", __FUNCTION__);
3402}
3403
3404static const struct rpc_call_ops nfs4_lock_ops = {
3405 .rpc_call_prepare = nfs4_lock_prepare,
3406 .rpc_call_done = nfs4_lock_done,
3407 .rpc_release = nfs4_lock_release,
3408};
3409
3410static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3411{
3412 struct nfs4_lockdata *data;
3413 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003414 struct rpc_message msg = {
3415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3416 .rpc_cred = state->owner->so_cred,
3417 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003418 struct rpc_task_setup task_setup_data = {
3419 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04003420 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003421 .callback_ops = &nfs4_lock_ops,
3422 .flags = RPC_TASK_ASYNC,
3423 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003424 int ret;
3425
3426 dprintk("%s: begin!\n", __FUNCTION__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003427 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003428 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;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003435 msg.rpc_argp = &data->arg,
3436 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003437 task_setup_data.callback_data = data;
3438 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003439 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003440 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003441 ret = nfs4_wait_for_completion_rpc_task(task);
3442 if (ret == 0) {
3443 ret = data->rpc_status;
3444 if (ret == -NFS4ERR_DENIED)
3445 ret = -EAGAIN;
3446 } else
3447 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003448 rpc_put_task(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003449 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3450 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003451}
3452
3453static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3454{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003455 struct nfs_server *server = NFS_SERVER(state->inode);
3456 struct nfs4_exception exception = { };
3457 int err;
3458
3459 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003460 /* Cache the lock if possible... */
3461 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3462 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003463 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3464 if (err != -NFS4ERR_DELAY)
3465 break;
3466 nfs4_handle_exception(server, err, &exception);
3467 } while (exception.retry);
3468 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469}
3470
3471static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3472{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003473 struct nfs_server *server = NFS_SERVER(state->inode);
3474 struct nfs4_exception exception = { };
3475 int err;
3476
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003477 err = nfs4_set_lock_state(state, request);
3478 if (err != 0)
3479 return err;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003480 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003481 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3482 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003483 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3484 if (err != -NFS4ERR_DELAY)
3485 break;
3486 nfs4_handle_exception(server, err, &exception);
3487 } while (exception.retry);
3488 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003489}
3490
3491static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3492{
David Howellsadfa6f92006-08-22 20:06:08 -04003493 struct nfs_client *clp = state->owner->so_client;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003494 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003495 int status;
3496
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003497 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003498 status = nfs4_set_lock_state(state, request);
3499 if (status != 0)
3500 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003501 request->fl_flags |= FL_ACCESS;
3502 status = do_vfs_lock(request->fl_file, request);
3503 if (status < 0)
3504 goto out;
3505 down_read(&clp->cl_sem);
3506 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3507 struct nfs_inode *nfsi = NFS_I(state->inode);
3508 /* Yes: cache locks! */
3509 down_read(&nfsi->rwsem);
3510 /* ...but avoid races with delegation recall... */
3511 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3512 request->fl_flags = fl_flags & ~FL_SLEEP;
3513 status = do_vfs_lock(request->fl_file, request);
3514 up_read(&nfsi->rwsem);
3515 goto out_unlock;
3516 }
3517 up_read(&nfsi->rwsem);
3518 }
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003519 status = _nfs4_do_setlk(state, cmd, request, 0);
3520 if (status != 0)
Trond Myklebust01c3b862006-06-29 16:38:39 -04003521 goto out_unlock;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003522 /* Note: we always want to sleep here! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04003523 request->fl_flags = fl_flags | FL_SLEEP;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003524 if (do_vfs_lock(request->fl_file, request) < 0)
3525 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003526out_unlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003527 up_read(&clp->cl_sem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003528out:
3529 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003530 return status;
3531}
3532
3533static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3534{
3535 struct nfs4_exception exception = { };
3536 int err;
3537
3538 do {
3539 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3540 _nfs4_proc_setlk(state, cmd, request),
3541 &exception);
3542 } while (exception.retry);
3543 return err;
3544}
3545
3546static int
3547nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3548{
3549 struct nfs_open_context *ctx;
3550 struct nfs4_state *state;
3551 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3552 int status;
3553
3554 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003555 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003556 state = ctx->state;
3557
3558 if (request->fl_start < 0 || request->fl_end < 0)
3559 return -EINVAL;
3560
3561 if (IS_GETLK(cmd))
3562 return nfs4_proc_getlk(state, F_GETLK, request);
3563
3564 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3565 return -EINVAL;
3566
3567 if (request->fl_type == F_UNLCK)
3568 return nfs4_proc_unlck(state, cmd, request);
3569
3570 do {
3571 status = nfs4_proc_setlk(state, cmd, request);
3572 if ((status != -EAGAIN) || IS_SETLK(cmd))
3573 break;
3574 timeout = nfs4_set_lock_task_retry(timeout);
3575 status = -ERESTARTSYS;
3576 if (signalled())
3577 break;
3578 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003579 return status;
3580}
3581
Trond Myklebust888e6942005-11-04 15:38:11 -05003582int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3583{
3584 struct nfs_server *server = NFS_SERVER(state->inode);
3585 struct nfs4_exception exception = { };
3586 int err;
3587
3588 err = nfs4_set_lock_state(state, fl);
3589 if (err != 0)
3590 goto out;
3591 do {
3592 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3593 if (err != -NFS4ERR_DELAY)
3594 break;
3595 err = nfs4_handle_exception(server, err, &exception);
3596 } while (exception.retry);
3597out:
3598 return err;
3599}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003600
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003601#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3602
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003603int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3604 size_t buflen, int flags)
3605{
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003606 struct inode *inode = dentry->d_inode;
3607
3608 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3609 return -EOPNOTSUPP;
3610
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003611 return nfs4_proc_set_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003612}
3613
3614/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3615 * and that's what we'll do for e.g. user attributes that haven't been set.
3616 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3617 * attributes in kernel-managed attribute namespaces. */
3618ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3619 size_t buflen)
3620{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003621 struct inode *inode = dentry->d_inode;
3622
3623 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3624 return -EOPNOTSUPP;
3625
3626 return nfs4_proc_get_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003627}
3628
3629ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3630{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003631 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003632
J. Bruce Fields096455a2006-03-20 23:23:42 -05003633 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3634 return 0;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003635 if (buf && buflen < len)
3636 return -ERANGE;
3637 if (buf)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003638 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3639 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003640}
3641
Trond Myklebust56659e92007-07-17 21:52:39 -04003642int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003643 struct nfs4_fs_locations *fs_locations, struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04003644{
3645 struct nfs_server *server = NFS_SERVER(dir);
3646 u32 bitmask[2] = {
Manoj Naik361e6242006-06-09 09:34:24 -04003647 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3648 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003649 };
3650 struct nfs4_fs_locations_arg args = {
3651 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05003652 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003653 .page = page,
3654 .bitmask = bitmask,
3655 };
3656 struct rpc_message msg = {
3657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3658 .rpc_argp = &args,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003659 .rpc_resp = fs_locations,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003660 };
3661 int status;
3662
3663 dprintk("%s: start\n", __FUNCTION__);
Trond Myklebustc228fd32007-01-13 02:28:11 -05003664 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04003665 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04003666 fs_locations->nlocations = 0;
Trond Myklebust683b57b2006-06-09 09:34:22 -04003667 status = rpc_call_sync(server->client, &msg, 0);
3668 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3669 return status;
3670}
3671
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3673 .recover_open = nfs4_open_reclaim,
3674 .recover_lock = nfs4_lock_reclaim,
3675};
3676
3677struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3678 .recover_open = nfs4_open_expired,
3679 .recover_lock = nfs4_lock_expired,
3680};
3681
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08003682static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003683 .permission = nfs_permission,
3684 .getattr = nfs_getattr,
3685 .setattr = nfs_setattr,
3686 .getxattr = nfs4_getxattr,
3687 .setxattr = nfs4_setxattr,
3688 .listxattr = nfs4_listxattr,
3689};
3690
David Howells509de812006-08-22 20:06:11 -04003691const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003692 .version = 4, /* protocol version */
3693 .dentry_ops = &nfs4_dentry_operations,
3694 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003695 .file_inode_ops = &nfs4_file_inode_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003696 .getroot = nfs4_proc_get_root,
3697 .getattr = nfs4_proc_getattr,
3698 .setattr = nfs4_proc_setattr,
David Howells2b3de442006-08-22 20:06:09 -04003699 .lookupfh = nfs4_proc_lookupfh,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003700 .lookup = nfs4_proc_lookup,
3701 .access = nfs4_proc_access,
3702 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003703 .create = nfs4_proc_create,
3704 .remove = nfs4_proc_remove,
3705 .unlink_setup = nfs4_proc_unlink_setup,
3706 .unlink_done = nfs4_proc_unlink_done,
3707 .rename = nfs4_proc_rename,
3708 .link = nfs4_proc_link,
3709 .symlink = nfs4_proc_symlink,
3710 .mkdir = nfs4_proc_mkdir,
3711 .rmdir = nfs4_proc_remove,
3712 .readdir = nfs4_proc_readdir,
3713 .mknod = nfs4_proc_mknod,
3714 .statfs = nfs4_proc_statfs,
3715 .fsinfo = nfs4_proc_fsinfo,
3716 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04003717 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003718 .decode_dirent = nfs4_decode_dirent,
3719 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05003720 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003722 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003723 .commit_setup = nfs4_proc_commit_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003724 .commit_done = nfs4_commit_done,
Trond Myklebust02a913a2005-10-18 14:20:17 -07003725 .file_open = nfs_open,
3726 .file_release = nfs_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003727 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00003728 .clear_acl_cache = nfs4_zap_acl_attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003729};
3730
3731/*
3732 * Local variables:
3733 * c-basic-offset: 8
3734 * End:
3735 */