blob: c910413eaecafd80ff2c6012dda6baad388cc6dd [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"
Trond Myklebust101070c2008-02-19 20:04:23 -050054#include "internal.h"
Chuck Lever006ea732006-03-20 13:44:14 -050055#include "iostat.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57#define NFSDBG_FACILITY NFSDBG_PROC
58
Trond Myklebust2066fe82006-09-15 08:30:46 -040059#define NFS4_POLL_RETRY_MIN (HZ/10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define NFS4_POLL_RETRY_MAX (15*HZ)
61
Trond Myklebustcdd4e682006-01-03 09:55:12 +010062struct nfs4_opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +010063static int _nfs4_proc_open(struct nfs4_opendata *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070065static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070066static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
David Howellsadfa6f92006-08-22 20:06:08 -040067static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
Trond Myklebust99367812007-07-17 21:52:41 -040068static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Linus Torvalds1da177e2005-04-16 15:20:36 -070071/* Prevent leaks of NFSv4 errors into userland */
72int nfs4_map_errors(int err)
73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -070076 __func__, -err);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
Trond Myklebust4ce79712005-06-22 17:16:21 +0000111const u32 nfs4_pathconf_bitmap[2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
Manoj Naik830b8e32006-06-09 09:34:25 -0400124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
Al Virobc4785c2006-10-19 23:28:51 -0700143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 struct nfs4_readdir_arg *readdir)
145{
Al Viro0dbb4c62006-10-19 23:28:49 -0700146 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000150 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
Al Viro0dbb4c62006-10-19 23:28:49 -0700167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
Trond Myklebust26e976a2006-01-03 09:55:21 +0100198static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199{
David Howells7539bba2006-08-22 20:06:09 -0400200 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
205}
206
Trond Myklebust38478b22006-05-25 01:40:57 -0400207static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Trond Myklebust38478b22006-05-25 01:40:57 -0400209 struct nfs_inode *nfsi = NFS_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Trond Myklebust38478b22006-05-25 01:40:57 -0400211 spin_lock(&dir->i_lock);
Trond Myklebust40d24702007-10-08 09:24:22 -0400212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400214 nfs_force_lookup_revalidate(dir);
Trond Myklebust40d24702007-10-08 09:24:22 -0400215 nfsi->change_attr = cinfo->after;
Trond Myklebust38478b22006-05-25 01:40:57 -0400216 spin_unlock(&dir->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217}
218
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100219struct nfs4_opendata {
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400220 struct kref kref;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100221 struct nfs_openargs o_arg;
222 struct nfs_openres o_res;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100223 struct nfs_open_confirmargs c_arg;
224 struct nfs_open_confirmres c_res;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100225 struct nfs_fattr f_attr;
226 struct nfs_fattr dir_attr;
Trond Myklebustad389da2007-06-05 12:30:00 -0400227 struct path path;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100228 struct dentry *dir;
229 struct nfs4_state_owner *owner;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400230 struct nfs4_state *state;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100231 struct iattr attrs;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100232 unsigned long timestamp;
Trond Myklebust3e309912007-07-07 13:19:59 -0400233 unsigned int rpc_done : 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100234 int rpc_status;
235 int cancelled;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100236};
237
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400238
239static void nfs4_init_opendata_res(struct nfs4_opendata *p)
240{
241 p->o_res.f_attr = &p->f_attr;
242 p->o_res.dir_attr = &p->dir_attr;
Trond Myklebustc1d51932008-04-07 13:20:54 -0400243 p->o_res.seqid = p->o_arg.seqid;
244 p->c_res.seqid = p->c_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400245 p->o_res.server = p->o_arg.server;
246 nfs_fattr_init(&p->f_attr);
247 nfs_fattr_init(&p->dir_attr);
248}
249
Trond Myklebustad389da2007-06-05 12:30:00 -0400250static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100251 struct nfs4_state_owner *sp, int flags,
252 const struct iattr *attrs)
253{
Trond Myklebustad389da2007-06-05 12:30:00 -0400254 struct dentry *parent = dget_parent(path->dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100255 struct inode *dir = parent->d_inode;
256 struct nfs_server *server = NFS_SERVER(dir);
257 struct nfs4_opendata *p;
258
259 p = kzalloc(sizeof(*p), GFP_KERNEL);
260 if (p == NULL)
261 goto err;
262 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
263 if (p->o_arg.seqid == NULL)
264 goto err_free;
Trond Myklebustad389da2007-06-05 12:30:00 -0400265 p->path.mnt = mntget(path->mnt);
266 p->path.dentry = dget(path->dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100267 p->dir = parent;
268 p->owner = sp;
269 atomic_inc(&sp->so_count);
270 p->o_arg.fh = NFS_FH(dir);
271 p->o_arg.open_flags = flags,
David Howells7539bba2006-08-22 20:06:09 -0400272 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400273 p->o_arg.id = sp->so_owner_id.id;
Trond Myklebustad389da2007-06-05 12:30:00 -0400274 p->o_arg.name = &p->path.dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100275 p->o_arg.server = server;
276 p->o_arg.bitmask = server->attr_bitmask;
277 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100278 if (flags & O_EXCL) {
279 u32 *s = (u32 *) p->o_arg.u.verifier.data;
280 s[0] = jiffies;
281 s[1] = current->pid;
282 } else if (flags & O_CREAT) {
283 p->o_arg.u.attrs = &p->attrs;
284 memcpy(&p->attrs, attrs, sizeof(p->attrs));
285 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100286 p->c_arg.fh = &p->o_res.fh;
287 p->c_arg.stateid = &p->o_res.stateid;
288 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400289 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400290 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100291 return p;
292err_free:
293 kfree(p);
294err:
295 dput(parent);
296 return NULL;
297}
298
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400299static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100300{
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400301 struct nfs4_opendata *p = container_of(kref,
302 struct nfs4_opendata, kref);
303
304 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400305 if (p->state != NULL)
306 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400307 nfs4_put_state_owner(p->owner);
308 dput(p->dir);
Jan Blunck31f31db12008-05-02 13:42:45 -0700309 path_put(&p->path);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400310 kfree(p);
311}
312
313static void nfs4_opendata_put(struct nfs4_opendata *p)
314{
315 if (p != NULL)
316 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100317}
318
Trond Myklebust06f814a2006-01-03 09:55:07 +0100319static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
320{
Trond Myklebust06f814a2006-01-03 09:55:07 +0100321 int ret;
322
Trond Myklebust06f814a2006-01-03 09:55:07 +0100323 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +0100324 return ret;
325}
326
Trond Myklebust6ee41262007-07-08 14:11:36 -0400327static int can_open_cached(struct nfs4_state *state, int mode)
328{
329 int ret = 0;
330 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
331 case FMODE_READ:
332 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -0400333 break;
334 case FMODE_WRITE:
335 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -0400336 break;
337 case FMODE_READ|FMODE_WRITE:
338 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
339 }
340 return ret;
341}
342
Trond Myklebustaac00a82007-07-05 19:02:21 -0400343static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
344{
345 if ((delegation->type & open_flags) != open_flags)
346 return 0;
347 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
348 return 0;
349 return 1;
350}
351
Trond Myklebust003707c2007-07-05 18:07:55 -0400352static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
Trond Myklebuste7616922006-01-03 09:55:13 +0100353{
354 switch (open_flags) {
355 case FMODE_WRITE:
356 state->n_wronly++;
357 break;
358 case FMODE_READ:
359 state->n_rdonly++;
360 break;
361 case FMODE_READ|FMODE_WRITE:
362 state->n_rdwr++;
363 }
Trond Myklebust003707c2007-07-05 18:07:55 -0400364 nfs4_state_set_mode_locked(state, state->state | open_flags);
Trond Myklebuste7616922006-01-03 09:55:13 +0100365}
366
Trond Myklebust003707c2007-07-05 18:07:55 -0400367static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
368{
369 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
370 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
371 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
372 switch (open_flags) {
373 case FMODE_READ:
374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
375 break;
376 case FMODE_WRITE:
377 set_bit(NFS_O_WRONLY_STATE, &state->flags);
378 break;
379 case FMODE_READ|FMODE_WRITE:
380 set_bit(NFS_O_RDWR_STATE, &state->flags);
381 }
382}
383
384static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
385{
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400386 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400387 nfs_set_open_stateid_locked(state, stateid, open_flags);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400388 write_sequnlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400389}
390
391static 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 -0700392{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 open_flags &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400394 /*
395 * Protect the call to nfs4_state_set_mode_locked and
396 * serialise the stateid update
397 */
398 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400399 if (deleg_stateid != NULL) {
400 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
401 set_bit(NFS_DELEGATED_STATE, &state->flags);
402 }
403 if (open_stateid != NULL)
404 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400405 write_sequnlock(&state->seqlock);
406 spin_lock(&state->owner->so_lock);
Trond Myklebuste7616922006-01-03 09:55:13 +0100407 update_open_stateflags(state, open_flags);
Trond Myklebustec073422005-10-20 14:22:47 -0700408 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409}
410
Trond Myklebustaac00a82007-07-05 19:02:21 -0400411static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
412{
413 struct nfs_delegation *delegation;
414
415 rcu_read_lock();
416 delegation = rcu_dereference(NFS_I(inode)->delegation);
417 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
418 rcu_read_unlock();
419 return;
420 }
421 rcu_read_unlock();
422 nfs_inode_return_delegation(inode);
423}
424
Trond Myklebust6ee41262007-07-08 14:11:36 -0400425static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -0400426{
427 struct nfs4_state *state = opendata->state;
428 struct nfs_inode *nfsi = NFS_I(state->inode);
429 struct nfs_delegation *delegation;
430 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
431 nfs4_stateid stateid;
432 int ret = -EAGAIN;
433
434 rcu_read_lock();
435 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400436 for (;;) {
Trond Myklebust6ee41262007-07-08 14:11:36 -0400437 if (can_open_cached(state, open_mode)) {
438 spin_lock(&state->owner->so_lock);
439 if (can_open_cached(state, open_mode)) {
440 update_open_stateflags(state, open_mode);
441 spin_unlock(&state->owner->so_lock);
442 rcu_read_unlock();
443 goto out_return_state;
444 }
445 spin_unlock(&state->owner->so_lock);
446 }
447 if (delegation == NULL)
448 break;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400449 if (!can_open_delegated(delegation, open_mode))
450 break;
451 /* Save the delegation */
452 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
453 rcu_read_unlock();
Trond Myklebustaf22f942007-08-10 17:45:10 -0400454 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400455 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 Myklebustcdd4e682006-01-03 09:55:12 +0100732}
733
734static void nfs4_open_confirm_release(void *calldata)
735{
736 struct nfs4_opendata *data = calldata;
737 struct nfs4_state *state = NULL;
738
739 /* If this request hasn't been cancelled, do nothing */
740 if (data->cancelled == 0)
741 goto out_free;
742 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -0400743 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100744 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100745 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400746 if (!IS_ERR(state))
Trond Myklebust4a35bd42007-06-05 10:31:33 -0400747 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100748out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400749 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100750}
751
752static const struct rpc_call_ops nfs4_open_confirm_ops = {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100753 .rpc_call_done = nfs4_open_confirm_done,
754 .rpc_release = nfs4_open_confirm_release,
755};
756
757/*
758 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
759 */
760static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
761{
762 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
763 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400764 struct rpc_message msg = {
765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
766 .rpc_argp = &data->c_arg,
767 .rpc_resp = &data->c_res,
768 .rpc_cred = data->owner->so_cred,
769 };
Trond Myklebustc970aa82007-07-14 15:39:59 -0400770 struct rpc_task_setup task_setup_data = {
771 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400772 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400773 .callback_ops = &nfs4_open_confirm_ops,
774 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -0500775 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400776 .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 Myklebust3e309912007-07-07 13:19:59 -0400861 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100862}
Trond Myklebust6f926b52005-10-18 14:20:18 -0700863
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100864static void nfs4_open_release(void *calldata)
865{
866 struct nfs4_opendata *data = calldata;
867 struct nfs4_state *state = NULL;
868
869 /* If this request hasn't been cancelled, do nothing */
870 if (data->cancelled == 0)
871 goto out_free;
872 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -0400873 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100874 goto out_free;
875 /* In case we need an open_confirm, no cleanup! */
876 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
877 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100878 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400879 if (!IS_ERR(state))
Trond Myklebust4a35bd42007-06-05 10:31:33 -0400880 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100881out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400882 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100883}
884
885static const struct rpc_call_ops nfs4_open_ops = {
886 .rpc_call_prepare = nfs4_open_prepare,
887 .rpc_call_done = nfs4_open_done,
888 .rpc_release = nfs4_open_release,
889};
890
891/*
892 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
893 */
894static int _nfs4_proc_open(struct nfs4_opendata *data)
895{
896 struct inode *dir = data->dir->d_inode;
897 struct nfs_server *server = NFS_SERVER(dir);
898 struct nfs_openargs *o_arg = &data->o_arg;
899 struct nfs_openres *o_res = &data->o_res;
900 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400901 struct rpc_message msg = {
902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
903 .rpc_argp = o_arg,
904 .rpc_resp = o_res,
905 .rpc_cred = data->owner->so_cred,
906 };
Trond Myklebustc970aa82007-07-14 15:39:59 -0400907 struct rpc_task_setup task_setup_data = {
908 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400909 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400910 .callback_ops = &nfs4_open_ops,
911 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -0500912 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400913 .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);
Trond Myklebust35d05772008-04-05 15:54:17 -0400982 if (ret == -ESTALE)
Trond Myklebust539cd032007-06-05 11:46:42 -0400983 d_drop(ctx->path.dentry);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400984 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100985 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986}
987
Trond Myklebust539cd032007-06-05 11:46:42 -0400988static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +0000989{
Trond Myklebust539cd032007-06-05 11:46:42 -0400990 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000991 struct nfs4_exception exception = { };
992 int err;
993
994 do {
Trond Myklebust539cd032007-06-05 11:46:42 -0400995 err = _nfs4_open_expired(ctx, state);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000996 if (err == -NFS4ERR_DELAY)
997 nfs4_handle_exception(server, err, &exception);
998 } while (exception.retry);
999 return err;
1000}
1001
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1003{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01001005 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
Trond Myklebust864472e2006-01-03 09:55:15 +01001007 ctx = nfs4_state_find_open_context(state);
1008 if (IS_ERR(ctx))
1009 return PTR_ERR(ctx);
Trond Myklebust539cd032007-06-05 11:46:42 -04001010 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001011 put_nfs_open_context(ctx);
1012 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013}
1014
1015/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001016 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1017 * fields corresponding to attributes that were used to store the verifier.
1018 * Make sure we clobber those fields in the later setattr call
1019 */
1020static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1021{
1022 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1023 !(sattr->ia_valid & ATTR_ATIME_SET))
1024 sattr->ia_valid |= ATTR_ATIME;
1025
1026 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1027 !(sattr->ia_valid & ATTR_MTIME_SET))
1028 sattr->ia_valid |= ATTR_MTIME;
1029}
1030
1031/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001032 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 */
Trond Myklebustad389da2007-06-05 12:30:00 -04001034static 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 -07001035{
1036 struct nfs4_state_owner *sp;
1037 struct nfs4_state *state = NULL;
1038 struct nfs_server *server = NFS_SERVER(dir);
David Howells7539bba2006-08-22 20:06:09 -04001039 struct nfs_client *clp = server->nfs_client;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001040 struct nfs4_opendata *opendata;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001041 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
1043 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 status = -ENOMEM;
1045 if (!(sp = nfs4_get_state_owner(server, cred))) {
1046 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1047 goto out_err;
1048 }
Trond Myklebust58d97142006-01-03 09:55:24 +01001049 status = nfs4_recover_expired_lease(server);
1050 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01001051 goto err_put_state_owner;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001052 if (path->dentry->d_inode != NULL)
1053 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
Trond Myklebust58d97142006-01-03 09:55:24 +01001054 down_read(&clp->cl_sem);
1055 status = -ENOMEM;
Trond Myklebustad389da2007-06-05 12:30:00 -04001056 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001057 if (opendata == NULL)
Trond Myklebust76723de2006-09-15 08:11:51 -04001058 goto err_release_rwsem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059
Trond Myklebustaac00a82007-07-05 19:02:21 -04001060 if (path->dentry->d_inode != NULL)
1061 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1062
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001063 status = _nfs4_proc_open(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 if (status != 0)
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001065 goto err_opendata_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001067 if (opendata->o_arg.open_flags & O_EXCL)
1068 nfs4_exclusive_attrset(opendata, sattr);
1069
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001070 state = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001071 status = PTR_ERR(state);
1072 if (IS_ERR(state))
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001073 goto err_opendata_put;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001074 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 nfs4_put_state_owner(sp);
1076 up_read(&clp->cl_sem);
1077 *res = state;
1078 return 0;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001079err_opendata_put:
1080 nfs4_opendata_put(opendata);
Trond Myklebust76723de2006-09-15 08:11:51 -04001081err_release_rwsem:
1082 up_read(&clp->cl_sem);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001083err_put_state_owner:
1084 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 *res = NULL;
1087 return status;
1088}
1089
1090
Trond Myklebustad389da2007-06-05 12:30:00 -04001091static 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 -07001092{
1093 struct nfs4_exception exception = { };
1094 struct nfs4_state *res;
1095 int status;
1096
1097 do {
Trond Myklebustad389da2007-06-05 12:30:00 -04001098 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 if (status == 0)
1100 break;
1101 /* NOTE: BAD_SEQID means the server and client disagree about the
1102 * book-keeping w.r.t. state-changing operations
1103 * (OPEN/CLOSE/LOCK/LOCKU...)
1104 * It is actually a sign of a bug on the client or on the server.
1105 *
1106 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001107 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 * have unhashed the old state_owner for us, and that we can
1109 * therefore safely retry using a new one. We should still warn
1110 * the user though...
1111 */
1112 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04001113 printk(KERN_WARNING "NFS: v4 server %s "
1114 " returned a bad sequence-id error!\n",
1115 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 exception.retry = 1;
1117 continue;
1118 }
Trond Myklebust550f5742005-10-18 14:20:21 -07001119 /*
1120 * BAD_STATEID on OPEN means that the server cancelled our
1121 * state before it received the OPEN_CONFIRM.
1122 * Recover by retrying the request as per the discussion
1123 * on Page 181 of RFC3530.
1124 */
1125 if (status == -NFS4ERR_BAD_STATEID) {
1126 exception.retry = 1;
1127 continue;
1128 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001129 if (status == -EAGAIN) {
1130 /* We must have found a delegation */
1131 exception.retry = 1;
1132 continue;
1133 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1135 status, &exception));
1136 } while (exception.retry);
1137 return res;
1138}
1139
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001140static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1141 struct nfs_fattr *fattr, struct iattr *sattr,
1142 struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001144 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001146 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 .iap = sattr,
1148 .server = server,
1149 .bitmask = server->attr_bitmask,
1150 };
1151 struct nfs_setattrres res = {
1152 .fattr = fattr,
1153 .server = server,
1154 };
1155 struct rpc_message msg = {
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1157 .rpc_argp = &arg,
1158 .rpc_resp = &res,
1159 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01001161 unsigned long timestamp = jiffies;
Trond Myklebust65e43082005-08-16 11:49:44 -04001162 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163
Trond Myklebust0e574af2005-10-27 22:12:38 -04001164 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001166 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1167 /* Use that stateid */
1168 } else if (state != NULL) {
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001169 nfs4_copy_stateid(&arg.stateid, state, current->files);
1170 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1172
Trond Myklebust65e43082005-08-16 11:49:44 -04001173 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001174 if (status == 0 && state != NULL)
1175 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04001176 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177}
1178
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001179static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1180 struct nfs_fattr *fattr, struct iattr *sattr,
1181 struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001183 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 struct nfs4_exception exception = { };
1185 int err;
1186 do {
1187 err = nfs4_handle_exception(server,
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001188 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 &exception);
1190 } while (exception.retry);
1191 return err;
1192}
1193
1194struct nfs4_closedata {
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001195 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 struct inode *inode;
1197 struct nfs4_state *state;
1198 struct nfs_closeargs arg;
1199 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001200 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001201 unsigned long timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202};
1203
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001204static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07001205{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001206 struct nfs4_closedata *calldata = data;
1207 struct nfs4_state_owner *sp = calldata->state->owner;
Trond Myklebust95121352005-10-18 14:20:12 -07001208
1209 nfs4_put_open_state(calldata->state);
1210 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001211 nfs4_put_state_owner(sp);
Jan Blunck31f31db12008-05-02 13:42:45 -07001212 path_put(&calldata->path);
Trond Myklebust95121352005-10-18 14:20:12 -07001213 kfree(calldata);
1214}
1215
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001216static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001218 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 struct nfs_server *server = NFS_SERVER(calldata->inode);
1221
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001222 if (RPC_ASSASSINATED(task))
1223 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 /* hmm. we are done with the inode, and in the process of freeing
1225 * the state_owner. we keep this around to process errors
1226 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 switch (task->tk_status) {
1228 case 0:
Trond Myklebust45328c32007-07-26 17:47:34 -04001229 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001230 renew_lease(server, calldata->timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 break;
1232 case -NFS4ERR_STALE_STATEID:
1233 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 break;
1235 default:
1236 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1237 rpc_restart_call(task);
1238 return;
1239 }
1240 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001241 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001244static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001246 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07001247 struct nfs4_state *state = calldata->state;
Trond Myklebust003707c2007-07-05 18:07:55 -04001248 int clear_rd, clear_wr, clear_rdwr;
Trond Myklebust95121352005-10-18 14:20:12 -07001249
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001250 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebust95121352005-10-18 14:20:12 -07001251 return;
Trond Myklebust003707c2007-07-05 18:07:55 -04001252
Trond Myklebust003707c2007-07-05 18:07:55 -04001253 clear_rd = clear_wr = clear_rdwr = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05001254 spin_lock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001255 /* Calculate the change in open mode */
Trond Myklebuste7616922006-01-03 09:55:13 +01001256 if (state->n_rdwr == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001257 if (state->n_rdonly == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001258 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1259 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1260 }
1261 if (state->n_wronly == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001262 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1263 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1264 }
Trond Myklebuste7616922006-01-03 09:55:13 +01001265 }
Trond Myklebust4cecb762005-11-04 15:32:58 -05001266 spin_unlock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001267 if (!clear_rd && !clear_wr && !clear_rdwr) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001268 /* Note: exit _without_ calling nfs4_close_done */
1269 task->tk_action = NULL;
Trond Myklebust95121352005-10-18 14:20:12 -07001270 return;
1271 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001272 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust45328c32007-07-26 17:47:34 -04001273 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
Trond Myklebust5138fde2007-07-14 15:40:01 -04001274 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust45328c32007-07-26 17:47:34 -04001275 calldata->arg.open_flags = FMODE_READ;
1276 } else if (test_bit(NFS_O_WRONLY_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_WRITE;
1279 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001280 calldata->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001281 rpc_call_start(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282}
1283
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001284static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001285 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001286 .rpc_call_done = nfs4_close_done,
1287 .rpc_release = nfs4_free_closedata,
1288};
1289
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290/*
1291 * It is possible for data to be read/written from a mem-mapped file
1292 * after the sys_close call (which hits the vfs layer as a flush).
1293 * This means that we can't safely call nfsv4 close on a file until
1294 * the inode is cleared. This in turn means that we are not good
1295 * NFSv4 citizens - we do not indicate to the server to update the file's
1296 * share state even when we are done with one of the three share
1297 * stateid's in the inode.
1298 *
1299 * NOTE: Caller must be holding the sp->so_owner semaphore!
1300 */
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001301int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001303 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04001305 struct nfs4_state_owner *sp = state->owner;
1306 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001307 struct rpc_message msg = {
1308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1309 .rpc_cred = state->owner->so_cred,
1310 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001311 struct rpc_task_setup task_setup_data = {
1312 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001313 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001314 .callback_ops = &nfs4_close_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05001315 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001316 .flags = RPC_TASK_ASYNC,
1317 };
Trond Myklebust95121352005-10-18 14:20:12 -07001318 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319
Trond Myklebust95121352005-10-18 14:20:12 -07001320 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07001322 goto out;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001323 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001325 calldata->arg.fh = NFS_FH(state->inode);
Trond Myklebust003707c2007-07-05 18:07:55 -04001326 calldata->arg.stateid = &state->open_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 /* Serialization for the sequence id */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001328 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001329 if (calldata->arg.seqid == NULL)
1330 goto out_free_calldata;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001331 calldata->arg.bitmask = server->attr_bitmask;
1332 calldata->res.fattr = &calldata->fattr;
Trond Myklebustc1d51932008-04-07 13:20:54 -04001333 calldata->res.seqid = calldata->arg.seqid;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001334 calldata->res.server = server;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001335 calldata->path.mnt = mntget(path->mnt);
1336 calldata->path.dentry = dget(path->dentry);
Trond Myklebust95121352005-10-18 14:20:12 -07001337
Trond Myklebust5138fde2007-07-14 15:40:01 -04001338 msg.rpc_argp = &calldata->arg,
1339 msg.rpc_resp = &calldata->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001340 task_setup_data.callback_data = calldata;
1341 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04001342 if (IS_ERR(task))
1343 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001344 status = 0;
1345 if (wait)
1346 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04001347 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001348 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07001349out_free_calldata:
1350 kfree(calldata);
1351out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04001352 nfs4_put_open_state(state);
1353 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07001354 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355}
1356
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001357static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
Trond Myklebust02a913a2005-10-18 14:20:17 -07001358{
1359 struct file *filp;
Trond Myklebust1b45c462007-07-03 13:04:56 -04001360 int ret;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001361
Trond Myklebust1b45c462007-07-03 13:04:56 -04001362 /* If the open_intent is for execute, we have an extra check to make */
1363 if (nd->intent.open.flags & FMODE_EXEC) {
Trond Myklebustaf22f942007-08-10 17:45:10 -04001364 ret = nfs_may_open(state->inode,
Trond Myklebust1b45c462007-07-03 13:04:56 -04001365 state->owner->so_cred,
1366 nd->intent.open.flags);
1367 if (ret < 0)
1368 goto out_close;
1369 }
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001370 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001371 if (!IS_ERR(filp)) {
1372 struct nfs_open_context *ctx;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04001373 ctx = nfs_file_open_context(filp);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001374 ctx->state = state;
Trond Myklebust95cf9592006-04-18 13:14:06 -04001375 return 0;
1376 }
Trond Myklebust1b45c462007-07-03 13:04:56 -04001377 ret = PTR_ERR(filp);
1378out_close:
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001379 nfs4_close_sync(path, state, nd->intent.open.flags);
Trond Myklebust1b45c462007-07-03 13:04:56 -04001380 return ret;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001381}
1382
1383struct dentry *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1385{
Trond Myklebustad389da2007-06-05 12:30:00 -04001386 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001387 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001388 .dentry = dentry,
1389 };
Jan Blunck4ac91372008-02-14 19:34:32 -08001390 struct dentry *parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 struct iattr attr;
1392 struct rpc_cred *cred;
1393 struct nfs4_state *state;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001394 struct dentry *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
1396 if (nd->flags & LOOKUP_CREATE) {
1397 attr.ia_mode = nd->intent.open.create_mode;
1398 attr.ia_valid = ATTR_MODE;
1399 if (!IS_POSIXACL(dir))
1400 attr.ia_mode &= ~current->fs->umask;
1401 } else {
1402 attr.ia_valid = 0;
1403 BUG_ON(nd->intent.open.flags & O_CREAT);
1404 }
1405
Trond Myklebust98a8e322008-03-12 12:25:28 -04001406 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 if (IS_ERR(cred))
Trond Myklebust02a913a2005-10-18 14:20:17 -07001408 return (struct dentry *)cred;
Trond Myklebust565277f2007-10-15 18:17:53 -04001409 parent = dentry->d_parent;
1410 /* Protect against concurrent sillydeletes */
1411 nfs_block_sillyrename(parent);
Trond Myklebustad389da2007-06-05 12:30:00 -04001412 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001414 if (IS_ERR(state)) {
Trond Myklebustd75340c2007-10-01 21:42:01 -04001415 if (PTR_ERR(state) == -ENOENT) {
Trond Myklebust02a913a2005-10-18 14:20:17 -07001416 d_add(dentry, NULL);
Trond Myklebustd75340c2007-10-01 21:42:01 -04001417 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1418 }
Trond Myklebust565277f2007-10-15 18:17:53 -04001419 nfs_unblock_sillyrename(parent);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001420 return (struct dentry *)state;
1421 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001422 res = d_add_unique(dentry, igrab(state->inode));
Trond Myklebust02a913a2005-10-18 14:20:17 -07001423 if (res != NULL)
Trond Myklebustdeee9362007-08-27 11:33:00 -04001424 path.dentry = res;
Trond Myklebustd75340c2007-10-01 21:42:01 -04001425 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
Trond Myklebust565277f2007-10-15 18:17:53 -04001426 nfs_unblock_sillyrename(parent);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001427 nfs4_intent_set_file(nd, &path, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001428 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429}
1430
1431int
Trond Myklebust02a913a2005-10-18 14:20:17 -07001432nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433{
Trond Myklebustad389da2007-06-05 12:30:00 -04001434 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001435 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001436 .dentry = dentry,
1437 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 struct rpc_cred *cred;
1439 struct nfs4_state *state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440
Trond Myklebust98a8e322008-03-12 12:25:28 -04001441 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 if (IS_ERR(cred))
1443 return PTR_ERR(cred);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001444 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001446 if (IS_ERR(state)) {
1447 switch (PTR_ERR(state)) {
1448 case -EPERM:
1449 case -EACCES:
1450 case -EDQUOT:
1451 case -ENOSPC:
1452 case -EROFS:
1453 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1454 return 1;
Chuck Leverb87c0ad2006-10-19 23:28:42 -07001455 default:
1456 goto out_drop;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001457 }
Trond Myklebust02a913a2005-10-18 14:20:17 -07001458 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001459 if (state->inode == dentry->d_inode) {
Trond Myklebustd75340c2007-10-01 21:42:01 -04001460 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001461 nfs4_intent_set_file(nd, &path, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 return 1;
1463 }
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001464 nfs4_close_sync(&path, state, openflags);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001465out_drop:
1466 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 return 0;
1468}
1469
1470
1471static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1472{
1473 struct nfs4_server_caps_res res = {};
1474 struct rpc_message msg = {
1475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1476 .rpc_argp = fhandle,
1477 .rpc_resp = &res,
1478 };
1479 int status;
1480
1481 status = rpc_call_sync(server->client, &msg, 0);
1482 if (status == 0) {
1483 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1484 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1485 server->caps |= NFS_CAP_ACLS;
1486 if (res.has_links != 0)
1487 server->caps |= NFS_CAP_HARDLINKS;
1488 if (res.has_symlinks != 0)
1489 server->caps |= NFS_CAP_SYMLINKS;
1490 server->acl_bitmask = res.acl_bitmask;
1491 }
1492 return status;
1493}
1494
Trond Myklebust55a97592006-06-09 09:34:19 -04001495int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496{
1497 struct nfs4_exception exception = { };
1498 int err;
1499 do {
1500 err = nfs4_handle_exception(server,
1501 _nfs4_server_capabilities(server, fhandle),
1502 &exception);
1503 } while (exception.retry);
1504 return err;
1505}
1506
1507static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1508 struct nfs_fsinfo *info)
1509{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 struct nfs4_lookup_root_arg args = {
1511 .bitmask = nfs4_fattr_bitmap,
1512 };
1513 struct nfs4_lookup_res res = {
1514 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04001515 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 .fh = fhandle,
1517 };
1518 struct rpc_message msg = {
1519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1520 .rpc_argp = &args,
1521 .rpc_resp = &res,
1522 };
Trond Myklebust0e574af2005-10-27 22:12:38 -04001523 nfs_fattr_init(info->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 return rpc_call_sync(server->client, &msg, 0);
1525}
1526
1527static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1528 struct nfs_fsinfo *info)
1529{
1530 struct nfs4_exception exception = { };
1531 int err;
1532 do {
1533 err = nfs4_handle_exception(server,
1534 _nfs4_lookup_root(server, fhandle, info),
1535 &exception);
1536 } while (exception.retry);
1537 return err;
1538}
1539
David Howells54ceac42006-08-22 20:06:13 -04001540/*
1541 * get the file handle for the "/" directory on the server
1542 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04001544 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 int status;
1547
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 status = nfs4_lookup_root(server, fhandle, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 if (status == 0)
1550 status = nfs4_server_capabilities(server, fhandle);
1551 if (status == 0)
1552 status = nfs4_do_fsinfo(server, fhandle, info);
Trond Myklebustc12e87f2006-03-13 21:20:47 -08001553 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554}
1555
Manoj Naik6b97fd32006-06-09 09:34:29 -04001556/*
1557 * Get locations and (maybe) other attributes of a referral.
1558 * Note that we'll actually follow the referral later when
1559 * we detect fsid mismatch in inode revalidation
1560 */
Trond Myklebust56659e92007-07-17 21:52:39 -04001561static 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 -04001562{
1563 int status = -ENOMEM;
1564 struct page *page = NULL;
1565 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04001566
1567 page = alloc_page(GFP_KERNEL);
1568 if (page == NULL)
1569 goto out;
1570 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1571 if (locations == NULL)
1572 goto out;
1573
Trond Myklebustc228fd32007-01-13 02:28:11 -05001574 status = nfs4_proc_fs_locations(dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001575 if (status != 0)
1576 goto out;
1577 /* Make sure server returned a different fsid for the referral */
1578 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -07001579 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001580 status = -EIO;
1581 goto out;
1582 }
1583
1584 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1585 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1586 if (!fattr->mode)
1587 fattr->mode = S_IFDIR;
1588 memset(fhandle, 0, sizeof(struct nfs_fh));
1589out:
1590 if (page)
1591 __free_page(page);
1592 if (locations)
1593 kfree(locations);
1594 return status;
1595}
1596
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1598{
1599 struct nfs4_getattr_arg args = {
1600 .fh = fhandle,
1601 .bitmask = server->attr_bitmask,
1602 };
1603 struct nfs4_getattr_res res = {
1604 .fattr = fattr,
1605 .server = server,
1606 };
1607 struct rpc_message msg = {
1608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1609 .rpc_argp = &args,
1610 .rpc_resp = &res,
1611 };
1612
Trond Myklebust0e574af2005-10-27 22:12:38 -04001613 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 return rpc_call_sync(server->client, &msg, 0);
1615}
1616
1617static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1618{
1619 struct nfs4_exception exception = { };
1620 int err;
1621 do {
1622 err = nfs4_handle_exception(server,
1623 _nfs4_proc_getattr(server, fhandle, fattr),
1624 &exception);
1625 } while (exception.retry);
1626 return err;
1627}
1628
1629/*
1630 * The file is not closed if it is opened due to the a request to change
1631 * the size of the file. The open call will not be needed once the
1632 * VFS layer lookup-intents are implemented.
1633 *
1634 * Close is called when the inode is destroyed.
1635 * If we haven't opened the file for O_WRONLY, we
1636 * need to in the size_change case to obtain a stateid.
1637 *
1638 * Got race?
1639 * Because OPEN is always done by name in nfsv4, it is
1640 * possible that we opened a different file by the same
1641 * name. We can recognize this race condition, but we
1642 * can't do anything about it besides returning an error.
1643 *
1644 * This will be fixed with VFS changes (lookup-intent).
1645 */
1646static int
1647nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1648 struct iattr *sattr)
1649{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001650 struct inode *inode = dentry->d_inode;
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001651 struct rpc_cred *cred = NULL;
Trond Myklebustd5308382005-11-04 15:33:38 -05001652 struct nfs4_state *state = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 int status;
1654
Trond Myklebust0e574af2005-10-27 22:12:38 -04001655 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656
Trond Myklebustd5308382005-11-04 15:33:38 -05001657 /* Search for an existing open(O_WRITE) file */
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001658 if (sattr->ia_valid & ATTR_FILE) {
1659 struct nfs_open_context *ctx;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001660
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001661 ctx = nfs_file_open_context(sattr->ia_file);
1662 cred = ctx->cred;
1663 state = ctx->state;
1664 }
1665
1666 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
Trond Myklebust65e43082005-08-16 11:49:44 -04001667 if (status == 0)
1668 nfs_setattr_update_inode(inode, sattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 return status;
1670}
1671
Trond Myklebust56659e92007-07-17 21:52:39 -04001672static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1673 const struct qstr *name, struct nfs_fh *fhandle,
David Howells2b3de442006-08-22 20:06:09 -04001674 struct nfs_fattr *fattr)
1675{
1676 int status;
1677 struct nfs4_lookup_arg args = {
1678 .bitmask = server->attr_bitmask,
1679 .dir_fh = dirfh,
1680 .name = name,
1681 };
1682 struct nfs4_lookup_res res = {
1683 .server = server,
1684 .fattr = fattr,
1685 .fh = fhandle,
1686 };
1687 struct rpc_message msg = {
1688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1689 .rpc_argp = &args,
1690 .rpc_resp = &res,
1691 };
1692
1693 nfs_fattr_init(fattr);
1694
1695 dprintk("NFS call lookupfh %s\n", name->name);
1696 status = rpc_call_sync(server->client, &msg, 0);
1697 dprintk("NFS reply lookupfh: %d\n", status);
David Howells2b3de442006-08-22 20:06:09 -04001698 return status;
1699}
1700
1701static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1702 struct qstr *name, struct nfs_fh *fhandle,
1703 struct nfs_fattr *fattr)
1704{
1705 struct nfs4_exception exception = { };
1706 int err;
1707 do {
Trond Myklebust4e56e082007-07-01 18:13:52 -04001708 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1709 /* FIXME: !!!! */
1710 if (err == -NFS4ERR_MOVED) {
1711 err = -EREMOTE;
1712 break;
1713 }
1714 err = nfs4_handle_exception(server, err, &exception);
David Howells2b3de442006-08-22 20:06:09 -04001715 } while (exception.retry);
1716 return err;
1717}
1718
Trond Myklebust56659e92007-07-17 21:52:39 -04001719static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1721{
Trond Myklebust4e56e082007-07-01 18:13:52 -04001722 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723
1724 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust4e56e082007-07-01 18:13:52 -04001725 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001726 if (status == -NFS4ERR_MOVED)
1727 status = nfs4_get_referral(dir, name, fattr, fhandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 dprintk("NFS reply lookup: %d\n", status);
1729 return status;
1730}
1731
1732static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1733{
1734 struct nfs4_exception exception = { };
1735 int err;
1736 do {
1737 err = nfs4_handle_exception(NFS_SERVER(dir),
1738 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1739 &exception);
1740 } while (exception.retry);
1741 return err;
1742}
1743
1744static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1745{
Trond Myklebust76b32992007-08-10 17:45:11 -04001746 struct nfs_server *server = NFS_SERVER(inode);
1747 struct nfs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 struct nfs4_accessargs args = {
1749 .fh = NFS_FH(inode),
Trond Myklebust76b32992007-08-10 17:45:11 -04001750 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 };
Trond Myklebust76b32992007-08-10 17:45:11 -04001752 struct nfs4_accessres res = {
1753 .server = server,
1754 .fattr = &fattr,
1755 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 struct rpc_message msg = {
1757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1758 .rpc_argp = &args,
1759 .rpc_resp = &res,
1760 .rpc_cred = entry->cred,
1761 };
1762 int mode = entry->mask;
1763 int status;
1764
1765 /*
1766 * Determine which access bits we want to ask for...
1767 */
1768 if (mode & MAY_READ)
1769 args.access |= NFS4_ACCESS_READ;
1770 if (S_ISDIR(inode->i_mode)) {
1771 if (mode & MAY_WRITE)
1772 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1773 if (mode & MAY_EXEC)
1774 args.access |= NFS4_ACCESS_LOOKUP;
1775 } else {
1776 if (mode & MAY_WRITE)
1777 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1778 if (mode & MAY_EXEC)
1779 args.access |= NFS4_ACCESS_EXECUTE;
1780 }
Trond Myklebust76b32992007-08-10 17:45:11 -04001781 nfs_fattr_init(&fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1783 if (!status) {
1784 entry->mask = 0;
1785 if (res.access & NFS4_ACCESS_READ)
1786 entry->mask |= MAY_READ;
1787 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1788 entry->mask |= MAY_WRITE;
1789 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1790 entry->mask |= MAY_EXEC;
Trond Myklebust76b32992007-08-10 17:45:11 -04001791 nfs_refresh_inode(inode, &fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792 }
1793 return status;
1794}
1795
1796static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1797{
1798 struct nfs4_exception exception = { };
1799 int err;
1800 do {
1801 err = nfs4_handle_exception(NFS_SERVER(inode),
1802 _nfs4_proc_access(inode, entry),
1803 &exception);
1804 } while (exception.retry);
1805 return err;
1806}
1807
1808/*
1809 * TODO: For the time being, we don't try to get any attributes
1810 * along with any of the zero-copy operations READ, READDIR,
1811 * READLINK, WRITE.
1812 *
1813 * In the case of the first three, we want to put the GETATTR
1814 * after the read-type operation -- this is because it is hard
1815 * to predict the length of a GETATTR response in v4, and thus
1816 * align the READ data correctly. This means that the GETATTR
1817 * may end up partially falling into the page cache, and we should
1818 * shift it into the 'tail' of the xdr_buf before processing.
1819 * To do this efficiently, we need to know the total length
1820 * of data received, which doesn't seem to be available outside
1821 * of the RPC layer.
1822 *
1823 * In the case of WRITE, we also want to put the GETATTR after
1824 * the operation -- in this case because we want to make sure
1825 * we get the post-operation mtime and size. This means that
1826 * we can't use xdr_encode_pages() as written: we need a variant
1827 * of it which would leave room in the 'tail' iovec.
1828 *
1829 * Both of these changes to the XDR layer would in fact be quite
1830 * minor, but I decided to leave them for a subsequent patch.
1831 */
1832static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1833 unsigned int pgbase, unsigned int pglen)
1834{
1835 struct nfs4_readlink args = {
1836 .fh = NFS_FH(inode),
1837 .pgbase = pgbase,
1838 .pglen = pglen,
1839 .pages = &page,
1840 };
1841 struct rpc_message msg = {
1842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1843 .rpc_argp = &args,
1844 .rpc_resp = NULL,
1845 };
1846
1847 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1848}
1849
1850static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1851 unsigned int pgbase, unsigned int pglen)
1852{
1853 struct nfs4_exception exception = { };
1854 int err;
1855 do {
1856 err = nfs4_handle_exception(NFS_SERVER(inode),
1857 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1858 &exception);
1859 } while (exception.retry);
1860 return err;
1861}
1862
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863/*
1864 * Got race?
1865 * We will need to arrange for the VFS layer to provide an atomic open.
1866 * Until then, this create/open method is prone to inefficiency and race
1867 * conditions due to the lookup, create, and open VFS calls from sys_open()
1868 * placed on the wire.
1869 *
1870 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1871 * The file will be opened again in the subsequent VFS open call
1872 * (nfs4_proc_file_open).
1873 *
1874 * The open for read will just hang around to be used by any process that
1875 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1876 */
1877
1878static int
1879nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Trond Myklebust02a913a2005-10-18 14:20:17 -07001880 int flags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881{
Trond Myklebustad389da2007-06-05 12:30:00 -04001882 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001883 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001884 .dentry = dentry,
1885 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 struct nfs4_state *state;
1887 struct rpc_cred *cred;
1888 int status = 0;
1889
Trond Myklebust98a8e322008-03-12 12:25:28 -04001890 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 if (IS_ERR(cred)) {
1892 status = PTR_ERR(cred);
1893 goto out;
1894 }
Trond Myklebustad389da2007-06-05 12:30:00 -04001895 state = nfs4_do_open(dir, &path, flags, sattr, cred);
Trond Myklebustd4d9cdc2007-10-02 18:38:53 -04001896 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 if (IS_ERR(state)) {
1898 status = PTR_ERR(state);
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001899 goto out_putcred;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 }
Trond Myklebustd4d9cdc2007-10-02 18:38:53 -04001901 d_add(dentry, igrab(state->inode));
Trond Myklebustd75340c2007-10-01 21:42:01 -04001902 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 if (flags & O_EXCL) {
1904 struct nfs_fattr fattr;
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001905 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001906 if (status == 0)
Trond Myklebust65e43082005-08-16 11:49:44 -04001907 nfs_setattr_update_inode(state->inode, sattr);
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001908 nfs_post_op_update_inode(state->inode, &fattr);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001909 }
Trond Myklebustad389da2007-06-05 12:30:00 -04001910 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001911 status = nfs4_intent_set_file(nd, &path, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001912 else
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001913 nfs4_close_sync(&path, state, flags);
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001914out_putcred:
1915 put_rpccred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916out:
1917 return status;
1918}
1919
1920static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1921{
Trond Myklebust16e42952005-10-27 22:12:44 -04001922 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001923 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 .fh = NFS_FH(dir),
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001925 .name.len = name->len,
1926 .name.name = name->name,
Trond Myklebust16e42952005-10-27 22:12:44 -04001927 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001929 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04001930 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04001931 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1934 .rpc_argp = &args,
1935 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 };
1937 int status;
1938
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001939 nfs_fattr_init(&res.dir_attr);
Trond Myklebust16e42952005-10-27 22:12:44 -04001940 status = rpc_call_sync(server->client, &msg, 0);
1941 if (status == 0) {
1942 update_changeattr(dir, &res.cinfo);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04001943 nfs_post_op_update_inode(dir, &res.dir_attr);
Trond Myklebust16e42952005-10-27 22:12:44 -04001944 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 return status;
1946}
1947
1948static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1949{
1950 struct nfs4_exception exception = { };
1951 int err;
1952 do {
1953 err = nfs4_handle_exception(NFS_SERVER(dir),
1954 _nfs4_proc_remove(dir, name),
1955 &exception);
1956 } while (exception.retry);
1957 return err;
1958}
1959
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001960static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001962 struct nfs_server *server = NFS_SERVER(dir);
1963 struct nfs_removeargs *args = msg->rpc_argp;
1964 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001966 args->bitmask = server->attr_bitmask;
1967 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969}
1970
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001971static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04001973 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1974
1975 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1976 return 0;
1977 update_changeattr(dir, &res->cinfo);
1978 nfs_post_op_update_inode(dir, &res->dir_attr);
1979 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980}
1981
1982static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1983 struct inode *new_dir, struct qstr *new_name)
1984{
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001985 struct nfs_server *server = NFS_SERVER(old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986 struct nfs4_rename_arg arg = {
1987 .old_dir = NFS_FH(old_dir),
1988 .new_dir = NFS_FH(new_dir),
1989 .old_name = old_name,
1990 .new_name = new_name,
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001991 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 };
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001993 struct nfs_fattr old_fattr, new_fattr;
1994 struct nfs4_rename_res res = {
1995 .server = server,
1996 .old_fattr = &old_fattr,
1997 .new_fattr = &new_fattr,
1998 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 struct rpc_message msg = {
2000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2001 .rpc_argp = &arg,
2002 .rpc_resp = &res,
2003 };
2004 int status;
2005
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002006 nfs_fattr_init(res.old_fattr);
2007 nfs_fattr_init(res.new_fattr);
2008 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009
2010 if (!status) {
2011 update_changeattr(old_dir, &res.old_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002012 nfs_post_op_update_inode(old_dir, res.old_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 update_changeattr(new_dir, &res.new_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002014 nfs_post_op_update_inode(new_dir, res.new_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 }
2016 return status;
2017}
2018
2019static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2020 struct inode *new_dir, struct qstr *new_name)
2021{
2022 struct nfs4_exception exception = { };
2023 int err;
2024 do {
2025 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2026 _nfs4_proc_rename(old_dir, old_name,
2027 new_dir, new_name),
2028 &exception);
2029 } while (exception.retry);
2030 return err;
2031}
2032
2033static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2034{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002035 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 struct nfs4_link_arg arg = {
2037 .fh = NFS_FH(inode),
2038 .dir_fh = NFS_FH(dir),
2039 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002040 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002042 struct nfs_fattr fattr, dir_attr;
2043 struct nfs4_link_res res = {
2044 .server = server,
2045 .fattr = &fattr,
2046 .dir_attr = &dir_attr,
2047 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 struct rpc_message msg = {
2049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2050 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002051 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 };
2053 int status;
2054
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002055 nfs_fattr_init(res.fattr);
2056 nfs_fattr_init(res.dir_attr);
2057 status = rpc_call_sync(server->client, &msg, 0);
2058 if (!status) {
2059 update_changeattr(dir, &res.cinfo);
2060 nfs_post_op_update_inode(dir, res.dir_attr);
Trond Myklebust73a3d072006-05-25 01:40:47 -04002061 nfs_post_op_update_inode(inode, res.fattr);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002062 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063
2064 return status;
2065}
2066
2067static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2068{
2069 struct nfs4_exception exception = { };
2070 int err;
2071 do {
2072 err = nfs4_handle_exception(NFS_SERVER(inode),
2073 _nfs4_proc_link(inode, dir, name),
2074 &exception);
2075 } while (exception.retry);
2076 return err;
2077}
2078
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002079struct nfs4_createdata {
2080 struct rpc_message msg;
2081 struct nfs4_create_arg arg;
2082 struct nfs4_create_res res;
2083 struct nfs_fh fh;
2084 struct nfs_fattr fattr;
2085 struct nfs_fattr dir_fattr;
2086};
2087
2088static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2089 struct qstr *name, struct iattr *sattr, u32 ftype)
2090{
2091 struct nfs4_createdata *data;
2092
2093 data = kzalloc(sizeof(*data), GFP_KERNEL);
2094 if (data != NULL) {
2095 struct nfs_server *server = NFS_SERVER(dir);
2096
2097 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2098 data->msg.rpc_argp = &data->arg;
2099 data->msg.rpc_resp = &data->res;
2100 data->arg.dir_fh = NFS_FH(dir);
2101 data->arg.server = server;
2102 data->arg.name = name;
2103 data->arg.attrs = sattr;
2104 data->arg.ftype = ftype;
2105 data->arg.bitmask = server->attr_bitmask;
2106 data->res.server = server;
2107 data->res.fh = &data->fh;
2108 data->res.fattr = &data->fattr;
2109 data->res.dir_fattr = &data->dir_fattr;
2110 nfs_fattr_init(data->res.fattr);
2111 nfs_fattr_init(data->res.dir_fattr);
2112 }
2113 return data;
2114}
2115
2116static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2117{
2118 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2119 if (status == 0) {
2120 update_changeattr(dir, &data->res.dir_cinfo);
2121 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2122 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2123 }
2124 return status;
2125}
2126
2127static void nfs4_free_createdata(struct nfs4_createdata *data)
2128{
2129 kfree(data);
2130}
2131
Chuck Lever4f390c12006-08-22 20:06:22 -04002132static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002133 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002135 struct nfs4_createdata *data;
2136 int status = -ENAMETOOLONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
Chuck Lever94a6d752006-08-22 20:06:23 -04002138 if (len > NFS4_MAXPATHLEN)
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002139 goto out;
Chuck Lever4f390c12006-08-22 20:06:22 -04002140
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002141 status = -ENOMEM;
2142 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2143 if (data == NULL)
2144 goto out;
2145
2146 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2147 data->arg.u.symlink.pages = &page;
2148 data->arg.u.symlink.len = len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002150 status = nfs4_do_create(dir, dentry, data);
2151
2152 nfs4_free_createdata(data);
2153out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154 return status;
2155}
2156
Chuck Lever4f390c12006-08-22 20:06:22 -04002157static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002158 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159{
2160 struct nfs4_exception exception = { };
2161 int err;
2162 do {
2163 err = nfs4_handle_exception(NFS_SERVER(dir),
Chuck Lever94a6d752006-08-22 20:06:23 -04002164 _nfs4_proc_symlink(dir, dentry, page,
2165 len, sattr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 &exception);
2167 } while (exception.retry);
2168 return err;
2169}
2170
2171static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2172 struct iattr *sattr)
2173{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002174 struct nfs4_createdata *data;
2175 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002177 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2178 if (data == NULL)
2179 goto out;
2180
2181 status = nfs4_do_create(dir, dentry, data);
2182
2183 nfs4_free_createdata(data);
2184out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185 return status;
2186}
2187
2188static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2189 struct iattr *sattr)
2190{
2191 struct nfs4_exception exception = { };
2192 int err;
2193 do {
2194 err = nfs4_handle_exception(NFS_SERVER(dir),
2195 _nfs4_proc_mkdir(dir, dentry, sattr),
2196 &exception);
2197 } while (exception.retry);
2198 return err;
2199}
2200
2201static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2202 u64 cookie, struct page *page, unsigned int count, int plus)
2203{
2204 struct inode *dir = dentry->d_inode;
2205 struct nfs4_readdir_arg args = {
2206 .fh = NFS_FH(dir),
2207 .pages = &page,
2208 .pgbase = 0,
2209 .count = count,
2210 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2211 };
2212 struct nfs4_readdir_res res;
2213 struct rpc_message msg = {
2214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2215 .rpc_argp = &args,
2216 .rpc_resp = &res,
2217 .rpc_cred = cred,
2218 };
2219 int status;
2220
Harvey Harrison3110ff82008-05-02 13:42:44 -07002221 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
Trond Myklebusteadf4592005-06-22 17:16:39 +00002222 dentry->d_parent->d_name.name,
2223 dentry->d_name.name,
2224 (unsigned long long)cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2226 res.pgbase = args.pgbase;
2227 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2228 if (status == 0)
2229 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustc4812992007-09-28 17:11:45 -04002230
2231 nfs_invalidate_atime(dir);
2232
Harvey Harrison3110ff82008-05-02 13:42:44 -07002233 dprintk("%s: returns %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 return status;
2235}
2236
2237static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2238 u64 cookie, struct page *page, unsigned int count, int plus)
2239{
2240 struct nfs4_exception exception = { };
2241 int err;
2242 do {
2243 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2244 _nfs4_proc_readdir(dentry, cred, cookie,
2245 page, count, plus),
2246 &exception);
2247 } while (exception.retry);
2248 return err;
2249}
2250
2251static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2252 struct iattr *sattr, dev_t rdev)
2253{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002254 struct nfs4_createdata *data;
2255 int mode = sattr->ia_mode;
2256 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257
2258 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2259 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002260
2261 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2262 if (data == NULL)
2263 goto out;
2264
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 if (S_ISFIFO(mode))
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002266 data->arg.ftype = NF4FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267 else if (S_ISBLK(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002268 data->arg.ftype = NF4BLK;
2269 data->arg.u.device.specdata1 = MAJOR(rdev);
2270 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 }
2272 else if (S_ISCHR(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002273 data->arg.ftype = NF4CHR;
2274 data->arg.u.device.specdata1 = MAJOR(rdev);
2275 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002278 status = nfs4_do_create(dir, dentry, data);
2279
2280 nfs4_free_createdata(data);
2281out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 return status;
2283}
2284
2285static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2286 struct iattr *sattr, dev_t rdev)
2287{
2288 struct nfs4_exception exception = { };
2289 int err;
2290 do {
2291 err = nfs4_handle_exception(NFS_SERVER(dir),
2292 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2293 &exception);
2294 } while (exception.retry);
2295 return err;
2296}
2297
2298static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2299 struct nfs_fsstat *fsstat)
2300{
2301 struct nfs4_statfs_arg args = {
2302 .fh = fhandle,
2303 .bitmask = server->attr_bitmask,
2304 };
2305 struct rpc_message msg = {
2306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2307 .rpc_argp = &args,
2308 .rpc_resp = fsstat,
2309 };
2310
Trond Myklebust0e574af2005-10-27 22:12:38 -04002311 nfs_fattr_init(fsstat->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 return rpc_call_sync(server->client, &msg, 0);
2313}
2314
2315static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2316{
2317 struct nfs4_exception exception = { };
2318 int err;
2319 do {
2320 err = nfs4_handle_exception(server,
2321 _nfs4_proc_statfs(server, fhandle, fsstat),
2322 &exception);
2323 } while (exception.retry);
2324 return err;
2325}
2326
2327static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2328 struct nfs_fsinfo *fsinfo)
2329{
2330 struct nfs4_fsinfo_arg args = {
2331 .fh = fhandle,
2332 .bitmask = server->attr_bitmask,
2333 };
2334 struct rpc_message msg = {
2335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2336 .rpc_argp = &args,
2337 .rpc_resp = fsinfo,
2338 };
2339
2340 return rpc_call_sync(server->client, &msg, 0);
2341}
2342
2343static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2344{
2345 struct nfs4_exception exception = { };
2346 int err;
2347
2348 do {
2349 err = nfs4_handle_exception(server,
2350 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2351 &exception);
2352 } while (exception.retry);
2353 return err;
2354}
2355
2356static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2357{
Trond Myklebust0e574af2005-10-27 22:12:38 -04002358 nfs_fattr_init(fsinfo->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2360}
2361
2362static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2363 struct nfs_pathconf *pathconf)
2364{
2365 struct nfs4_pathconf_arg args = {
2366 .fh = fhandle,
2367 .bitmask = server->attr_bitmask,
2368 };
2369 struct rpc_message msg = {
2370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2371 .rpc_argp = &args,
2372 .rpc_resp = pathconf,
2373 };
2374
2375 /* None of the pathconf attributes are mandatory to implement */
2376 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2377 memset(pathconf, 0, sizeof(*pathconf));
2378 return 0;
2379 }
2380
Trond Myklebust0e574af2005-10-27 22:12:38 -04002381 nfs_fattr_init(pathconf->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382 return rpc_call_sync(server->client, &msg, 0);
2383}
2384
2385static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2386 struct nfs_pathconf *pathconf)
2387{
2388 struct nfs4_exception exception = { };
2389 int err;
2390
2391 do {
2392 err = nfs4_handle_exception(server,
2393 _nfs4_proc_pathconf(server, fhandle, pathconf),
2394 &exception);
2395 } while (exception.retry);
2396 return err;
2397}
2398
Trond Myklebustec06c092006-03-20 13:44:27 -05002399static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400{
Trond Myklebustec06c092006-03-20 13:44:27 -05002401 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402
Trond Myklebustec06c092006-03-20 13:44:27 -05002403 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 rpc_restart_call(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05002405 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 }
Trond Myklebust8850df92007-09-28 17:20:07 -04002407
2408 nfs_invalidate_atime(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409 if (task->tk_status > 0)
Trond Myklebustec06c092006-03-20 13:44:27 -05002410 renew_lease(server, data->timestamp);
2411 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412}
2413
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002414static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 data->timestamp = jiffies;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002417 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418}
2419
Trond Myklebust788e7a82006-03-20 13:44:27 -05002420static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422 struct inode *inode = data->inode;
2423
2424 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2425 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002426 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002428 if (task->tk_status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 renew_lease(NFS_SERVER(inode), data->timestamp);
Trond Myklebust70ca8852007-09-30 15:21:24 -04002430 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002431 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05002432 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433}
2434
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002435static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436{
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002437 struct nfs_server *server = NFS_SERVER(data->inode);
2438
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002439 data->args.bitmask = server->attr_bitmask;
2440 data->res.server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 data->timestamp = jiffies;
2442
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002443 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444}
2445
Trond Myklebust788e7a82006-03-20 13:44:27 -05002446static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448 struct inode *inode = data->inode;
2449
2450 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2451 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002452 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453 }
Trond Myklebust9e08a3c2007-10-08 14:10:31 -04002454 nfs_refresh_inode(inode, data->res.fattr);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002455 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002456}
2457
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002458static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459{
Trond Myklebust788e7a82006-03-20 13:44:27 -05002460 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002462 data->args.bitmask = server->attr_bitmask;
2463 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002464 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465}
2466
2467/*
2468 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2469 * standalone procedure for queueing an asynchronous RENEW.
2470 */
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002471static void nfs4_renew_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472{
David Howellsadfa6f92006-08-22 20:06:08 -04002473 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002474 unsigned long timestamp = (unsigned long)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475
2476 if (task->tk_status < 0) {
2477 switch (task->tk_status) {
2478 case -NFS4ERR_STALE_CLIENTID:
2479 case -NFS4ERR_EXPIRED:
2480 case -NFS4ERR_CB_PATH_DOWN:
2481 nfs4_schedule_state_recovery(clp);
2482 }
2483 return;
2484 }
2485 spin_lock(&clp->cl_lock);
2486 if (time_before(clp->cl_last_renewal,timestamp))
2487 clp->cl_last_renewal = timestamp;
2488 spin_unlock(&clp->cl_lock);
2489}
2490
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002491static const struct rpc_call_ops nfs4_renew_ops = {
2492 .rpc_call_done = nfs4_renew_done,
2493};
2494
David Howellsadfa6f92006-08-22 20:06:08 -04002495int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496{
2497 struct rpc_message msg = {
2498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2499 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002500 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501 };
2502
2503 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002504 &nfs4_renew_ops, (void *)jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505}
2506
David Howellsadfa6f92006-08-22 20:06:08 -04002507int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508{
2509 struct rpc_message msg = {
2510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2511 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002512 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 };
2514 unsigned long now = jiffies;
2515 int status;
2516
2517 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2518 if (status < 0)
2519 return status;
2520 spin_lock(&clp->cl_lock);
2521 if (time_before(clp->cl_last_renewal,now))
2522 clp->cl_last_renewal = now;
2523 spin_unlock(&clp->cl_lock);
2524 return 0;
2525}
2526
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002527static inline int nfs4_server_supports_acls(struct nfs_server *server)
2528{
2529 return (server->caps & NFS_CAP_ACLS)
2530 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2531 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2532}
2533
2534/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2535 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2536 * the stack.
2537 */
2538#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2539
2540static void buf_to_pages(const void *buf, size_t buflen,
2541 struct page **pages, unsigned int *pgbase)
2542{
2543 const void *p = buf;
2544
2545 *pgbase = offset_in_page(buf);
2546 p -= *pgbase;
2547 while (p < buf + buflen) {
2548 *(pages++) = virt_to_page(p);
2549 p += PAGE_CACHE_SIZE;
2550 }
2551}
2552
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002553struct nfs4_cached_acl {
2554 int cached;
2555 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00002556 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002557};
2558
2559static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002560{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002561 struct nfs_inode *nfsi = NFS_I(inode);
2562
2563 spin_lock(&inode->i_lock);
2564 kfree(nfsi->nfs4_acl);
2565 nfsi->nfs4_acl = acl;
2566 spin_unlock(&inode->i_lock);
2567}
2568
2569static void nfs4_zap_acl_attr(struct inode *inode)
2570{
2571 nfs4_set_cached_acl(inode, NULL);
2572}
2573
2574static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2575{
2576 struct nfs_inode *nfsi = NFS_I(inode);
2577 struct nfs4_cached_acl *acl;
2578 int ret = -ENOENT;
2579
2580 spin_lock(&inode->i_lock);
2581 acl = nfsi->nfs4_acl;
2582 if (acl == NULL)
2583 goto out;
2584 if (buf == NULL) /* user is just asking for length */
2585 goto out_len;
2586 if (acl->cached == 0)
2587 goto out;
2588 ret = -ERANGE; /* see getxattr(2) man page */
2589 if (acl->len > buflen)
2590 goto out;
2591 memcpy(buf, acl->data, acl->len);
2592out_len:
2593 ret = acl->len;
2594out:
2595 spin_unlock(&inode->i_lock);
2596 return ret;
2597}
2598
2599static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2600{
2601 struct nfs4_cached_acl *acl;
2602
2603 if (buf && acl_len <= PAGE_SIZE) {
2604 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2605 if (acl == NULL)
2606 goto out;
2607 acl->cached = 1;
2608 memcpy(acl->data, buf, acl_len);
2609 } else {
2610 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2611 if (acl == NULL)
2612 goto out;
2613 acl->cached = 0;
2614 }
2615 acl->len = acl_len;
2616out:
2617 nfs4_set_cached_acl(inode, acl);
2618}
2619
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002620static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002621{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002622 struct page *pages[NFS4ACL_MAXPAGES];
2623 struct nfs_getaclargs args = {
2624 .fh = NFS_FH(inode),
2625 .acl_pages = pages,
2626 .acl_len = buflen,
2627 };
2628 size_t resp_len = buflen;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002629 void *resp_buf;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002630 struct rpc_message msg = {
2631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2632 .rpc_argp = &args,
2633 .rpc_resp = &resp_len,
2634 };
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002635 struct page *localpage = NULL;
2636 int ret;
2637
2638 if (buflen < PAGE_SIZE) {
2639 /* As long as we're doing a round trip to the server anyway,
2640 * let's be prepared for a page of acl data. */
2641 localpage = alloc_page(GFP_KERNEL);
2642 resp_buf = page_address(localpage);
2643 if (localpage == NULL)
2644 return -ENOMEM;
2645 args.acl_pages[0] = localpage;
2646 args.acl_pgbase = 0;
J. Bruce Fields1d95db82005-10-13 16:54:32 -04002647 resp_len = args.acl_len = PAGE_SIZE;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002648 } else {
2649 resp_buf = buf;
2650 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2651 }
2652 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2653 if (ret)
2654 goto out_free;
2655 if (resp_len > args.acl_len)
2656 nfs4_write_cached_acl(inode, NULL, resp_len);
2657 else
2658 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2659 if (buf) {
2660 ret = -ERANGE;
2661 if (resp_len > buflen)
2662 goto out_free;
2663 if (localpage)
2664 memcpy(buf, resp_buf, resp_len);
2665 }
2666 ret = resp_len;
2667out_free:
2668 if (localpage)
2669 __free_page(localpage);
2670 return ret;
2671}
2672
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002673static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2674{
2675 struct nfs4_exception exception = { };
2676 ssize_t ret;
2677 do {
2678 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2679 if (ret >= 0)
2680 break;
2681 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2682 } while (exception.retry);
2683 return ret;
2684}
2685
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002686static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2687{
2688 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002689 int ret;
2690
2691 if (!nfs4_server_supports_acls(server))
2692 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002693 ret = nfs_revalidate_inode(server, inode);
2694 if (ret < 0)
2695 return ret;
Trond Myklebustf41f7412008-06-11 17:39:04 -04002696 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2697 nfs_zap_acl_cache(inode);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002698 ret = nfs4_read_cached_acl(inode, buf, buflen);
2699 if (ret != -ENOENT)
2700 return ret;
2701 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002702}
2703
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002704static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002705{
2706 struct nfs_server *server = NFS_SERVER(inode);
2707 struct page *pages[NFS4ACL_MAXPAGES];
2708 struct nfs_setaclargs arg = {
2709 .fh = NFS_FH(inode),
2710 .acl_pages = pages,
2711 .acl_len = buflen,
2712 };
2713 struct rpc_message msg = {
2714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2715 .rpc_argp = &arg,
2716 .rpc_resp = NULL,
2717 };
2718 int ret;
2719
2720 if (!nfs4_server_supports_acls(server))
2721 return -EOPNOTSUPP;
Trond Myklebust642ac542005-10-18 14:20:19 -07002722 nfs_inode_return_delegation(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002723 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
David Howells1f163412006-08-22 20:06:11 -04002724 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
Trond Myklebustf41f7412008-06-11 17:39:04 -04002725 nfs_access_zap_cache(inode);
2726 nfs_zap_acl_cache(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002727 return ret;
2728}
2729
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002730static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2731{
2732 struct nfs4_exception exception = { };
2733 int err;
2734 do {
2735 err = nfs4_handle_exception(NFS_SERVER(inode),
2736 __nfs4_proc_set_acl(inode, buf, buflen),
2737 &exception);
2738 } while (exception.retry);
2739 return err;
2740}
2741
Linus Torvalds1da177e2005-04-16 15:20:36 -07002742static int
Trond Myklebustfaf5f492005-10-18 14:20:15 -07002743nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002744{
David Howells7539bba2006-08-22 20:06:09 -04002745 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746
2747 if (!clp || task->tk_status >= 0)
2748 return 0;
2749 switch(task->tk_status) {
2750 case -NFS4ERR_STALE_CLIENTID:
2751 case -NFS4ERR_STALE_STATEID:
2752 case -NFS4ERR_EXPIRED:
Trond Myklebust5d008372008-02-22 16:34:17 -05002753 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 nfs4_schedule_state_recovery(clp);
Trond Myklebust433fbe42006-01-03 09:55:22 +01002755 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
Trond Myklebustfda13932008-02-22 16:34:12 -05002756 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757 task->tk_status = 0;
2758 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002759 case -NFS4ERR_DELAY:
Trond Myklebust2e96d282008-06-11 16:42:05 -04002760 nfs_inc_server_stats(server, NFSIOS_DELAY);
Chuck Lever006ea732006-03-20 13:44:14 -05002761 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2763 task->tk_status = 0;
2764 return -EAGAIN;
2765 case -NFS4ERR_OLD_STATEID:
2766 task->tk_status = 0;
2767 return -EAGAIN;
2768 }
2769 task->tk_status = nfs4_map_errors(task->tk_status);
2770 return 0;
2771}
2772
Matthew Wilcox150030b2007-12-06 16:24:39 -05002773static int nfs4_wait_bit_killable(void *word)
Trond Myklebust433fbe42006-01-03 09:55:22 +01002774{
Matthew Wilcox150030b2007-12-06 16:24:39 -05002775 if (fatal_signal_pending(current))
Trond Myklebust433fbe42006-01-03 09:55:22 +01002776 return -ERESTARTSYS;
2777 schedule();
2778 return 0;
2779}
2780
David Howellsadfa6f92006-08-22 20:06:08 -04002781static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782{
Trond Myklebust433fbe42006-01-03 09:55:22 +01002783 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002784
2785 might_sleep();
2786
Trond Myklebuste1485822006-12-13 16:43:13 -05002787 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2788
Trond Myklebust433fbe42006-01-03 09:55:22 +01002789 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
Matthew Wilcox150030b2007-12-06 16:24:39 -05002790 nfs4_wait_bit_killable, TASK_KILLABLE);
Trond Myklebuste1485822006-12-13 16:43:13 -05002791
2792 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002793 return res;
2794}
2795
2796static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2797{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002798 int res = 0;
2799
2800 might_sleep();
2801
2802 if (*timeout <= 0)
2803 *timeout = NFS4_POLL_RETRY_MIN;
2804 if (*timeout > NFS4_POLL_RETRY_MAX)
2805 *timeout = NFS4_POLL_RETRY_MAX;
Matthew Wilcox150030b2007-12-06 16:24:39 -05002806 schedule_timeout_killable(*timeout);
2807 if (fatal_signal_pending(current))
2808 res = -ERESTARTSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002809 *timeout <<= 1;
2810 return res;
2811}
2812
2813/* This is the error handling routine for processes that are allowed
2814 * to sleep.
2815 */
Trond Myklebust10afec92007-05-14 17:16:04 -04002816static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002817{
David Howells7539bba2006-08-22 20:06:09 -04002818 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002819 int ret = errorcode;
2820
2821 exception->retry = 0;
2822 switch(errorcode) {
2823 case 0:
2824 return 0;
2825 case -NFS4ERR_STALE_CLIENTID:
2826 case -NFS4ERR_STALE_STATEID:
2827 case -NFS4ERR_EXPIRED:
Trond Myklebust433fbe42006-01-03 09:55:22 +01002828 nfs4_schedule_state_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829 ret = nfs4_wait_clnt_recover(server->client, clp);
2830 if (ret == 0)
2831 exception->retry = 1;
2832 break;
Trond Myklebustc5149832006-09-15 08:25:04 -04002833 case -NFS4ERR_FILE_OPEN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 case -NFS4ERR_GRACE:
2835 case -NFS4ERR_DELAY:
2836 ret = nfs4_delay(server->client, &exception->timeout);
Trond Myklebust2c566172005-11-04 15:33:50 -05002837 if (ret != 0)
2838 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 case -NFS4ERR_OLD_STATEID:
Trond Myklebust2c566172005-11-04 15:33:50 -05002840 exception->retry = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841 }
2842 /* We failed to handle the error */
2843 return nfs4_map_errors(ret);
2844}
2845
David Howellsadfa6f92006-08-22 20:06:08 -04002846int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002847{
2848 nfs4_verifier sc_verifier;
2849 struct nfs4_setclientid setclientid = {
2850 .sc_verifier = &sc_verifier,
2851 .sc_prog = program,
2852 };
2853 struct rpc_message msg = {
2854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2855 .rpc_argp = &setclientid,
2856 .rpc_resp = clp,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002857 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858 };
Al Virobc4785c2006-10-19 23:28:51 -07002859 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860 int loop = 0;
2861 int status;
2862
Al Virobc4785c2006-10-19 23:28:51 -07002863 p = (__be32*)sc_verifier.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2865 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2866
2867 for(;;) {
2868 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
Trond Myklebust69dd7162007-12-14 14:56:07 -05002869 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
Chuck Leverd4d3c502007-12-10 14:57:09 -05002870 clp->cl_ipaddr,
2871 rpc_peeraddr2str(clp->cl_rpcclient,
2872 RPC_DISPLAY_ADDR),
Trond Myklebust69dd7162007-12-14 14:56:07 -05002873 rpc_peeraddr2str(clp->cl_rpcclient,
2874 RPC_DISPLAY_PROTO),
Trond Myklebust78ea3232008-04-07 20:49:28 -04002875 clp->cl_rpcclient->cl_auth->au_ops->au_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876 clp->cl_id_uniquifier);
2877 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
Chuck Leverd4d3c502007-12-10 14:57:09 -05002878 sizeof(setclientid.sc_netid),
2879 rpc_peeraddr2str(clp->cl_rpcclient,
2880 RPC_DISPLAY_NETID));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05002882 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002883 clp->cl_ipaddr, port >> 8, port & 255);
2884
2885 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2886 if (status != -NFS4ERR_CLID_INUSE)
2887 break;
2888 if (signalled())
2889 break;
2890 if (loop++ & 1)
2891 ssleep(clp->cl_lease_time + 1);
2892 else
2893 if (++clp->cl_id_uniquifier == 0)
2894 break;
2895 }
2896 return status;
2897}
2898
David Howellsadfa6f92006-08-22 20:06:08 -04002899static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900{
2901 struct nfs_fsinfo fsinfo;
2902 struct rpc_message msg = {
2903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2904 .rpc_argp = clp,
2905 .rpc_resp = &fsinfo,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002906 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907 };
2908 unsigned long now;
2909 int status;
2910
2911 now = jiffies;
2912 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2913 if (status == 0) {
2914 spin_lock(&clp->cl_lock);
2915 clp->cl_lease_time = fsinfo.lease_time * HZ;
2916 clp->cl_last_renewal = now;
Trond Myklebust58d97142006-01-03 09:55:24 +01002917 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002918 spin_unlock(&clp->cl_lock);
2919 }
2920 return status;
2921}
2922
David Howellsadfa6f92006-08-22 20:06:08 -04002923int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Trond Myklebust51581f32006-03-20 13:44:47 -05002924{
Benny Halevy77e03672008-06-24 20:25:57 +03002925 long timeout = 0;
Trond Myklebust51581f32006-03-20 13:44:47 -05002926 int err;
2927 do {
2928 err = _nfs4_proc_setclientid_confirm(clp, cred);
2929 switch (err) {
2930 case 0:
2931 return err;
2932 case -NFS4ERR_RESOURCE:
2933 /* The IBM lawyers misread another document! */
2934 case -NFS4ERR_DELAY:
2935 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2936 }
2937 } while (err == 0);
2938 return err;
2939}
2940
Trond Myklebustfe650402006-01-03 09:55:18 +01002941struct nfs4_delegreturndata {
2942 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002943 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01002944 struct nfs_fh fh;
2945 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002946 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002947 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01002948 int rpc_status;
2949};
2950
Trond Myklebustfe650402006-01-03 09:55:18 +01002951static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2952{
2953 struct nfs4_delegreturndata *data = calldata;
2954 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002955 if (data->rpc_status == 0)
Trond Myklebustfa178f22006-01-03 09:55:38 +01002956 renew_lease(data->res.server, data->timestamp);
Trond Myklebustfe650402006-01-03 09:55:18 +01002957}
2958
2959static void nfs4_delegreturn_release(void *calldata)
2960{
Trond Myklebustfe650402006-01-03 09:55:18 +01002961 kfree(calldata);
2962}
2963
Jesper Juhlc8d149f2006-03-20 13:44:07 -05002964static const struct rpc_call_ops nfs4_delegreturn_ops = {
Trond Myklebustfe650402006-01-03 09:55:18 +01002965 .rpc_call_done = nfs4_delegreturn_done,
2966 .rpc_release = nfs4_delegreturn_release,
2967};
2968
Trond Myklebuste6f81072008-01-24 18:14:34 -05002969static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01002970{
2971 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002972 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01002973 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002974 struct rpc_message msg = {
2975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2976 .rpc_cred = cred,
2977 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002978 struct rpc_task_setup task_setup_data = {
2979 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002980 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002981 .callback_ops = &nfs4_delegreturn_ops,
2982 .flags = RPC_TASK_ASYNC,
2983 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05002984 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01002985
2986 data = kmalloc(sizeof(*data), GFP_KERNEL);
2987 if (data == NULL)
2988 return -ENOMEM;
2989 data->args.fhandle = &data->fh;
2990 data->args.stateid = &data->stateid;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002991 data->args.bitmask = server->attr_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01002992 nfs_copy_fh(&data->fh, NFS_FH(inode));
2993 memcpy(&data->stateid, stateid, sizeof(data->stateid));
Trond Myklebustfa178f22006-01-03 09:55:38 +01002994 data->res.fattr = &data->fattr;
2995 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002996 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002997 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01002998 data->rpc_status = 0;
2999
Trond Myklebustc970aa82007-07-14 15:39:59 -04003000 task_setup_data.callback_data = data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003001 msg.rpc_argp = &data->args,
3002 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003003 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003004 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01003005 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05003006 if (!issync)
3007 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01003008 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05003009 if (status != 0)
3010 goto out;
3011 status = data->rpc_status;
3012 if (status != 0)
3013 goto out;
3014 nfs_refresh_inode(inode, &data->fattr);
3015out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003016 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01003017 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003018}
3019
Trond Myklebuste6f81072008-01-24 18:14:34 -05003020int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021{
3022 struct nfs_server *server = NFS_SERVER(inode);
3023 struct nfs4_exception exception = { };
3024 int err;
3025 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05003026 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027 switch (err) {
3028 case -NFS4ERR_STALE_STATEID:
3029 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030 case 0:
3031 return 0;
3032 }
3033 err = nfs4_handle_exception(server, err, &exception);
3034 } while (exception.retry);
3035 return err;
3036}
3037
3038#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3039#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3040
3041/*
3042 * sleep, with exponential backoff, and retry the LOCK operation.
3043 */
3044static unsigned long
3045nfs4_set_lock_task_retry(unsigned long timeout)
3046{
Matthew Wilcox150030b2007-12-06 16:24:39 -05003047 schedule_timeout_killable(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003048 timeout <<= 1;
3049 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3050 return NFS4_LOCK_MAXTIMEOUT;
3051 return timeout;
3052}
3053
Linus Torvalds1da177e2005-04-16 15:20:36 -07003054static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3055{
3056 struct inode *inode = state->inode;
3057 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04003058 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003059 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003060 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003061 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003062 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003063 struct nfs_lockt_res res = {
3064 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003065 };
3066 struct rpc_message msg = {
3067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3068 .rpc_argp = &arg,
3069 .rpc_resp = &res,
3070 .rpc_cred = state->owner->so_cred,
3071 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003072 struct nfs4_lock_state *lsp;
3073 int status;
3074
3075 down_read(&clp->cl_sem);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003076 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003077 status = nfs4_set_lock_state(state, request);
3078 if (status != 0)
3079 goto out;
3080 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04003081 arg.lock_owner.id = lsp->ls_id.id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003082 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003083 switch (status) {
3084 case 0:
3085 request->fl_type = F_UNLCK;
3086 break;
3087 case -NFS4ERR_DENIED:
3088 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003089 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05003090 request->fl_ops->fl_release_private(request);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003091out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092 up_read(&clp->cl_sem);
3093 return status;
3094}
3095
3096static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3097{
3098 struct nfs4_exception exception = { };
3099 int err;
3100
3101 do {
3102 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3103 _nfs4_proc_getlk(state, cmd, request),
3104 &exception);
3105 } while (exception.retry);
3106 return err;
3107}
3108
3109static int do_vfs_lock(struct file *file, struct file_lock *fl)
3110{
3111 int res = 0;
3112 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3113 case FL_POSIX:
3114 res = posix_lock_file_wait(file, fl);
3115 break;
3116 case FL_FLOCK:
3117 res = flock_lock_file_wait(file, fl);
3118 break;
3119 default:
3120 BUG();
3121 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122 return res;
3123}
3124
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003125struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003126 struct nfs_locku_args arg;
3127 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003128 struct nfs4_lock_state *lsp;
3129 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003130 struct file_lock fl;
3131 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003132 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003133};
3134
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003135static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3136 struct nfs_open_context *ctx,
3137 struct nfs4_lock_state *lsp,
3138 struct nfs_seqid *seqid)
3139{
3140 struct nfs4_unlockdata *p;
3141 struct inode *inode = lsp->ls_state->inode;
3142
3143 p = kmalloc(sizeof(*p), GFP_KERNEL);
3144 if (p == NULL)
3145 return NULL;
3146 p->arg.fh = NFS_FH(inode);
3147 p->arg.fl = &p->fl;
3148 p->arg.seqid = seqid;
Trond Myklebustc1d51932008-04-07 13:20:54 -04003149 p->res.seqid = seqid;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003150 p->arg.stateid = &lsp->ls_stateid;
3151 p->lsp = lsp;
3152 atomic_inc(&lsp->ls_count);
3153 /* Ensure we don't close file until we're done freeing locks! */
3154 p->ctx = get_nfs_open_context(ctx);
3155 memcpy(&p->fl, fl, sizeof(p->fl));
3156 p->server = NFS_SERVER(inode);
3157 return p;
3158}
3159
Trond Myklebust06f814a2006-01-03 09:55:07 +01003160static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003161{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003162 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003163 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01003164 nfs4_put_lock_state(calldata->lsp);
3165 put_nfs_open_context(calldata->ctx);
3166 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003167}
3168
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003169static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003170{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003171 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003172
Trond Myklebust06f814a2006-01-03 09:55:07 +01003173 if (RPC_ASSASSINATED(task))
3174 return;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003175 switch (task->tk_status) {
3176 case 0:
3177 memcpy(calldata->lsp->ls_stateid.data,
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003178 calldata->res.stateid.data,
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003179 sizeof(calldata->lsp->ls_stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +01003180 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003181 break;
3182 case -NFS4ERR_STALE_STATEID:
3183 case -NFS4ERR_EXPIRED:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003184 break;
3185 default:
Trond Myklebusta6a352e2006-12-13 16:43:06 -05003186 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003187 rpc_restart_call(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003188 }
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003189}
3190
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003191static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003192{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003193 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003195 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003196 return;
3197 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003198 /* Note: exit _without_ running nfs4_locku_done */
3199 task->tk_action = NULL;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003200 return;
3201 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003202 calldata->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003203 rpc_call_start(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204}
3205
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003206static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003207 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003208 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01003209 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003210};
3211
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003212static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3213 struct nfs_open_context *ctx,
3214 struct nfs4_lock_state *lsp,
3215 struct nfs_seqid *seqid)
3216{
3217 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3220 .rpc_cred = ctx->cred,
3221 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003222 struct rpc_task_setup task_setup_data = {
3223 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04003224 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003225 .callback_ops = &nfs4_locku_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05003226 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003227 .flags = RPC_TASK_ASYNC,
3228 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003229
Frank Filz137d6ac2007-07-09 15:32:29 -07003230 /* Ensure this is an unlock - when canceling a lock, the
3231 * canceled lock is passed in, and it won't be an unlock.
3232 */
3233 fl->fl_type = F_UNLCK;
3234
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003235 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3236 if (data == NULL) {
3237 nfs_free_seqid(seqid);
3238 return ERR_PTR(-ENOMEM);
3239 }
3240
Trond Myklebust5138fde2007-07-14 15:40:01 -04003241 msg.rpc_argp = &data->arg,
3242 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003243 task_setup_data.callback_data = data;
3244 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003245}
3246
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3248{
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003249 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003250 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01003251 struct rpc_task *task;
3252 int status = 0;
Trond Myklebust536ff0f2008-04-04 15:08:02 -04003253 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254
Trond Myklebust9b073572006-06-29 16:38:34 -04003255 status = nfs4_set_lock_state(state, request);
3256 /* Unlock _before_ we do the RPC call */
3257 request->fl_flags |= FL_EXISTS;
3258 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3259 goto out;
3260 if (status != 0)
3261 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003262 /* Is this a delegated lock? */
3263 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust9b073572006-06-29 16:38:34 -04003264 goto out;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003265 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003266 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
Trond Myklebust9b073572006-06-29 16:38:34 -04003267 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003268 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04003269 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003270 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003271 status = PTR_ERR(task);
3272 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04003273 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003274 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003275 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04003276out:
Trond Myklebust536ff0f2008-04-04 15:08:02 -04003277 request->fl_flags = fl_flags;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003278 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003279}
3280
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003281struct nfs4_lockdata {
3282 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003283 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003284 struct nfs4_lock_state *lsp;
3285 struct nfs_open_context *ctx;
3286 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003287 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003288 int rpc_status;
3289 int cancelled;
3290};
3291
3292static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3293 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3294{
3295 struct nfs4_lockdata *p;
3296 struct inode *inode = lsp->ls_state->inode;
3297 struct nfs_server *server = NFS_SERVER(inode);
3298
3299 p = kzalloc(sizeof(*p), GFP_KERNEL);
3300 if (p == NULL)
3301 return NULL;
3302
3303 p->arg.fh = NFS_FH(inode);
3304 p->arg.fl = &p->fl;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003305 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3306 if (p->arg.open_seqid == NULL)
3307 goto out_free;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003308 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3309 if (p->arg.lock_seqid == NULL)
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003310 goto out_free_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003311 p->arg.lock_stateid = &lsp->ls_stateid;
David Howells7539bba2006-08-22 20:06:09 -04003312 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04003313 p->arg.lock_owner.id = lsp->ls_id.id;
Trond Myklebustc1d51932008-04-07 13:20:54 -04003314 p->res.lock_seqid = p->arg.lock_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003315 p->lsp = lsp;
3316 atomic_inc(&lsp->ls_count);
3317 p->ctx = get_nfs_open_context(ctx);
3318 memcpy(&p->fl, fl, sizeof(p->fl));
3319 return p;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003320out_free_seqid:
3321 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003322out_free:
3323 kfree(p);
3324 return NULL;
3325}
3326
3327static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3328{
3329 struct nfs4_lockdata *data = calldata;
3330 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003331
Harvey Harrison3110ff82008-05-02 13:42:44 -07003332 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003333 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3334 return;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003335 /* Do we need to do an open_to_lock_owner? */
3336 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
Trond Myklebuste6e21972008-01-02 16:27:16 -05003337 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3338 return;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003339 data->arg.open_stateid = &state->stateid;
3340 data->arg.new_lock_owner = 1;
Trond Myklebustc1d51932008-04-07 13:20:54 -04003341 data->res.open_seqid = data->arg.open_seqid;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003342 } else
3343 data->arg.new_lock_owner = 0;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003344 data->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003345 rpc_call_start(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003346 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003347}
3348
3349static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3350{
3351 struct nfs4_lockdata *data = calldata;
3352
Harvey Harrison3110ff82008-05-02 13:42:44 -07003353 dprintk("%s: begin!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003354
3355 data->rpc_status = task->tk_status;
3356 if (RPC_ASSASSINATED(task))
3357 goto out;
3358 if (data->arg.new_lock_owner != 0) {
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003359 if (data->rpc_status == 0)
3360 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3361 else
3362 goto out;
3363 }
3364 if (data->rpc_status == 0) {
3365 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3366 sizeof(data->lsp->ls_stateid.data));
3367 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
Trond Myklebust88be9f92007-06-05 10:42:27 -04003368 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003369 }
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003370out:
Harvey Harrison3110ff82008-05-02 13:42:44 -07003371 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003372}
3373
3374static void nfs4_lock_release(void *calldata)
3375{
3376 struct nfs4_lockdata *data = calldata;
3377
Harvey Harrison3110ff82008-05-02 13:42:44 -07003378 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003379 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003380 if (data->cancelled != 0) {
3381 struct rpc_task *task;
3382 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3383 data->arg.lock_seqid);
3384 if (!IS_ERR(task))
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003385 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003386 dprintk("%s: cancelling lock!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003387 } else
3388 nfs_free_seqid(data->arg.lock_seqid);
3389 nfs4_put_lock_state(data->lsp);
3390 put_nfs_open_context(data->ctx);
3391 kfree(data);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003392 dprintk("%s: done!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003393}
3394
3395static const struct rpc_call_ops nfs4_lock_ops = {
3396 .rpc_call_prepare = nfs4_lock_prepare,
3397 .rpc_call_done = nfs4_lock_done,
3398 .rpc_release = nfs4_lock_release,
3399};
3400
3401static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3402{
3403 struct nfs4_lockdata *data;
3404 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003405 struct rpc_message msg = {
3406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3407 .rpc_cred = state->owner->so_cred,
3408 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003409 struct rpc_task_setup task_setup_data = {
3410 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04003411 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003412 .callback_ops = &nfs4_lock_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05003413 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003414 .flags = RPC_TASK_ASYNC,
3415 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003416 int ret;
3417
Harvey Harrison3110ff82008-05-02 13:42:44 -07003418 dprintk("%s: begin!\n", __func__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003419 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003420 fl->fl_u.nfs4_fl.owner);
3421 if (data == NULL)
3422 return -ENOMEM;
3423 if (IS_SETLKW(cmd))
3424 data->arg.block = 1;
3425 if (reclaim != 0)
3426 data->arg.reclaim = 1;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003427 msg.rpc_argp = &data->arg,
3428 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003429 task_setup_data.callback_data = data;
3430 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003431 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003432 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003433 ret = nfs4_wait_for_completion_rpc_task(task);
3434 if (ret == 0) {
3435 ret = data->rpc_status;
3436 if (ret == -NFS4ERR_DENIED)
3437 ret = -EAGAIN;
3438 } else
3439 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003440 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003441 dprintk("%s: done, ret = %d!\n", __func__, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003442 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443}
3444
3445static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3446{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003447 struct nfs_server *server = NFS_SERVER(state->inode);
3448 struct nfs4_exception exception = { };
3449 int err;
3450
3451 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003452 /* Cache the lock if possible... */
3453 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3454 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003455 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3456 if (err != -NFS4ERR_DELAY)
3457 break;
3458 nfs4_handle_exception(server, err, &exception);
3459 } while (exception.retry);
3460 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003461}
3462
3463static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3464{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003465 struct nfs_server *server = NFS_SERVER(state->inode);
3466 struct nfs4_exception exception = { };
3467 int err;
3468
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003469 err = nfs4_set_lock_state(state, request);
3470 if (err != 0)
3471 return err;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003472 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003473 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3474 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003475 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3476 if (err != -NFS4ERR_DELAY)
3477 break;
3478 nfs4_handle_exception(server, err, &exception);
3479 } while (exception.retry);
3480 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003481}
3482
3483static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3484{
David Howellsadfa6f92006-08-22 20:06:08 -04003485 struct nfs_client *clp = state->owner->so_client;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003486 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003487 int status;
3488
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003489 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003490 status = nfs4_set_lock_state(state, request);
3491 if (status != 0)
3492 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003493 request->fl_flags |= FL_ACCESS;
3494 status = do_vfs_lock(request->fl_file, request);
3495 if (status < 0)
3496 goto out;
3497 down_read(&clp->cl_sem);
3498 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3499 struct nfs_inode *nfsi = NFS_I(state->inode);
3500 /* Yes: cache locks! */
3501 down_read(&nfsi->rwsem);
3502 /* ...but avoid races with delegation recall... */
3503 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3504 request->fl_flags = fl_flags & ~FL_SLEEP;
3505 status = do_vfs_lock(request->fl_file, request);
3506 up_read(&nfsi->rwsem);
3507 goto out_unlock;
3508 }
3509 up_read(&nfsi->rwsem);
3510 }
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003511 status = _nfs4_do_setlk(state, cmd, request, 0);
3512 if (status != 0)
Trond Myklebust01c3b862006-06-29 16:38:39 -04003513 goto out_unlock;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003514 /* Note: we always want to sleep here! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04003515 request->fl_flags = fl_flags | FL_SLEEP;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003516 if (do_vfs_lock(request->fl_file, request) < 0)
Harvey Harrison3110ff82008-05-02 13:42:44 -07003517 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003518out_unlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003519 up_read(&clp->cl_sem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003520out:
3521 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003522 return status;
3523}
3524
3525static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3526{
3527 struct nfs4_exception exception = { };
3528 int err;
3529
3530 do {
3531 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3532 _nfs4_proc_setlk(state, cmd, request),
3533 &exception);
3534 } while (exception.retry);
3535 return err;
3536}
3537
3538static int
3539nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3540{
3541 struct nfs_open_context *ctx;
3542 struct nfs4_state *state;
3543 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3544 int status;
3545
3546 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003547 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003548 state = ctx->state;
3549
3550 if (request->fl_start < 0 || request->fl_end < 0)
3551 return -EINVAL;
3552
3553 if (IS_GETLK(cmd))
3554 return nfs4_proc_getlk(state, F_GETLK, request);
3555
3556 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3557 return -EINVAL;
3558
3559 if (request->fl_type == F_UNLCK)
3560 return nfs4_proc_unlck(state, cmd, request);
3561
3562 do {
3563 status = nfs4_proc_setlk(state, cmd, request);
3564 if ((status != -EAGAIN) || IS_SETLK(cmd))
3565 break;
3566 timeout = nfs4_set_lock_task_retry(timeout);
3567 status = -ERESTARTSYS;
3568 if (signalled())
3569 break;
3570 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003571 return status;
3572}
3573
Trond Myklebust888e6942005-11-04 15:38:11 -05003574int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3575{
3576 struct nfs_server *server = NFS_SERVER(state->inode);
3577 struct nfs4_exception exception = { };
3578 int err;
3579
3580 err = nfs4_set_lock_state(state, fl);
3581 if (err != 0)
3582 goto out;
3583 do {
3584 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3585 if (err != -NFS4ERR_DELAY)
3586 break;
3587 err = nfs4_handle_exception(server, err, &exception);
3588 } while (exception.retry);
3589out:
3590 return err;
3591}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003592
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003593#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3594
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003595int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3596 size_t buflen, int flags)
3597{
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003598 struct inode *inode = dentry->d_inode;
3599
3600 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3601 return -EOPNOTSUPP;
3602
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003603 return nfs4_proc_set_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003604}
3605
3606/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3607 * and that's what we'll do for e.g. user attributes that haven't been set.
3608 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3609 * attributes in kernel-managed attribute namespaces. */
3610ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3611 size_t buflen)
3612{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003613 struct inode *inode = dentry->d_inode;
3614
3615 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3616 return -EOPNOTSUPP;
3617
3618 return nfs4_proc_get_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003619}
3620
3621ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3622{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003623 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003624
J. Bruce Fields096455a2006-03-20 23:23:42 -05003625 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3626 return 0;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003627 if (buf && buflen < len)
3628 return -ERANGE;
3629 if (buf)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003630 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3631 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003632}
3633
Trond Myklebust56659e92007-07-17 21:52:39 -04003634int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003635 struct nfs4_fs_locations *fs_locations, struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04003636{
3637 struct nfs_server *server = NFS_SERVER(dir);
3638 u32 bitmask[2] = {
Manoj Naik361e6242006-06-09 09:34:24 -04003639 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3640 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003641 };
3642 struct nfs4_fs_locations_arg args = {
3643 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05003644 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003645 .page = page,
3646 .bitmask = bitmask,
3647 };
3648 struct rpc_message msg = {
3649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3650 .rpc_argp = &args,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003651 .rpc_resp = fs_locations,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003652 };
3653 int status;
3654
Harvey Harrison3110ff82008-05-02 13:42:44 -07003655 dprintk("%s: start\n", __func__);
Trond Myklebustc228fd32007-01-13 02:28:11 -05003656 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04003657 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04003658 fs_locations->nlocations = 0;
Trond Myklebust683b57b2006-06-09 09:34:22 -04003659 status = rpc_call_sync(server->client, &msg, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003660 dprintk("%s: returned status = %d\n", __func__, status);
Trond Myklebust683b57b2006-06-09 09:34:22 -04003661 return status;
3662}
3663
Linus Torvalds1da177e2005-04-16 15:20:36 -07003664struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3665 .recover_open = nfs4_open_reclaim,
3666 .recover_lock = nfs4_lock_reclaim,
3667};
3668
3669struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3670 .recover_open = nfs4_open_expired,
3671 .recover_lock = nfs4_lock_expired,
3672};
3673
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08003674static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003675 .permission = nfs_permission,
3676 .getattr = nfs_getattr,
3677 .setattr = nfs_setattr,
3678 .getxattr = nfs4_getxattr,
3679 .setxattr = nfs4_setxattr,
3680 .listxattr = nfs4_listxattr,
3681};
3682
David Howells509de812006-08-22 20:06:11 -04003683const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003684 .version = 4, /* protocol version */
3685 .dentry_ops = &nfs4_dentry_operations,
3686 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003687 .file_inode_ops = &nfs4_file_inode_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 .getroot = nfs4_proc_get_root,
3689 .getattr = nfs4_proc_getattr,
3690 .setattr = nfs4_proc_setattr,
David Howells2b3de442006-08-22 20:06:09 -04003691 .lookupfh = nfs4_proc_lookupfh,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003692 .lookup = nfs4_proc_lookup,
3693 .access = nfs4_proc_access,
3694 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003695 .create = nfs4_proc_create,
3696 .remove = nfs4_proc_remove,
3697 .unlink_setup = nfs4_proc_unlink_setup,
3698 .unlink_done = nfs4_proc_unlink_done,
3699 .rename = nfs4_proc_rename,
3700 .link = nfs4_proc_link,
3701 .symlink = nfs4_proc_symlink,
3702 .mkdir = nfs4_proc_mkdir,
3703 .rmdir = nfs4_proc_remove,
3704 .readdir = nfs4_proc_readdir,
3705 .mknod = nfs4_proc_mknod,
3706 .statfs = nfs4_proc_statfs,
3707 .fsinfo = nfs4_proc_fsinfo,
3708 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04003709 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 .decode_dirent = nfs4_decode_dirent,
3711 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05003712 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003713 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003714 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003715 .commit_setup = nfs4_proc_commit_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003716 .commit_done = nfs4_commit_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003717 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00003718 .clear_acl_cache = nfs4_zap_acl_attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719};
3720
3721/*
3722 * Local variables:
3723 * c-basic-offset: 8
3724 * End:
3725 */