blob: 4674f8092da8aaa52ae4af6835c6b150341efe66 [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 Myklebust9e33bed2008-12-23 15:21:46 -050065static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
Trond Myklebust99367812007-07-17 21:52:41 -040066static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069/* Prevent leaks of NFSv4 errors into userland */
WANG Cong46f72f52008-12-30 16:35:55 -050070static int nfs4_map_errors(int err)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -070074 __func__, -err);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
Trond Myklebust4ce79712005-06-22 17:16:21 +0000109const u32 nfs4_pathconf_bitmap[2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
Manoj Naik830b8e32006-06-09 09:34:25 -0400122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
Al Virobc4785c2006-10-19 23:28:51 -0700141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 struct nfs4_readdir_arg *readdir)
143{
Al Viro0dbb4c62006-10-19 23:28:49 -0700144 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000148 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
Al Viro0dbb4c62006-10-19 23:28:49 -0700165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
Trond Myklebust65de8722008-12-23 15:21:44 -0500196static int nfs4_wait_clnt_recover(struct nfs_client *clp)
197{
198 int res;
199
200 might_sleep();
201
Trond Myklebuste005e802008-12-23 15:21:48 -0500202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400203 nfs_wait_bit_killable, TASK_KILLABLE);
Trond Myklebust65de8722008-12-23 15:21:44 -0500204 return res;
205}
206
207static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
208{
209 int res = 0;
210
211 might_sleep();
212
213 if (*timeout <= 0)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
219 res = -ERESTARTSYS;
220 *timeout <<= 1;
221 return res;
222}
223
224/* This is the error handling routine for processes that are allowed
225 * to sleep.
226 */
227static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
228{
229 struct nfs_client *clp = server->nfs_client;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500230 struct nfs4_state *state = exception->state;
Trond Myklebust65de8722008-12-23 15:21:44 -0500231 int ret = errorcode;
232
233 exception->retry = 0;
234 switch(errorcode) {
235 case 0:
236 return 0;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
240 if (state == NULL)
241 break;
242 nfs4_state_mark_reclaim_nograce(clp, state);
Trond Myklebust65de8722008-12-23 15:21:44 -0500243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
248 if (ret == 0)
249 exception->retry = 1;
250 break;
251 case -NFS4ERR_FILE_OPEN:
252 case -NFS4ERR_GRACE:
253 case -NFS4ERR_DELAY:
254 ret = nfs4_delay(server->client, &exception->timeout);
255 if (ret != 0)
256 break;
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
259 }
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
262}
263
264
Trond Myklebust26e976a2006-01-03 09:55:21 +0100265static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{
David Howells7539bba2006-08-22 20:06:09 -0400267 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
272}
273
Trond Myklebust38478b22006-05-25 01:40:57 -0400274static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275{
Trond Myklebust38478b22006-05-25 01:40:57 -0400276 struct nfs_inode *nfsi = NFS_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Trond Myklebust38478b22006-05-25 01:40:57 -0400278 spin_lock(&dir->i_lock);
Trond Myklebust40d24702007-10-08 09:24:22 -0400279 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
280 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400281 nfs_force_lookup_revalidate(dir);
Trond Myklebust40d24702007-10-08 09:24:22 -0400282 nfsi->change_attr = cinfo->after;
Trond Myklebust38478b22006-05-25 01:40:57 -0400283 spin_unlock(&dir->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284}
285
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100286struct nfs4_opendata {
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400287 struct kref kref;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100288 struct nfs_openargs o_arg;
289 struct nfs_openres o_res;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100290 struct nfs_open_confirmargs c_arg;
291 struct nfs_open_confirmres c_res;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100292 struct nfs_fattr f_attr;
293 struct nfs_fattr dir_attr;
Trond Myklebustad389da2007-06-05 12:30:00 -0400294 struct path path;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100295 struct dentry *dir;
296 struct nfs4_state_owner *owner;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400297 struct nfs4_state *state;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100298 struct iattr attrs;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100299 unsigned long timestamp;
Trond Myklebust3e309912007-07-07 13:19:59 -0400300 unsigned int rpc_done : 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100301 int rpc_status;
302 int cancelled;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100303};
304
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400305
306static void nfs4_init_opendata_res(struct nfs4_opendata *p)
307{
308 p->o_res.f_attr = &p->f_attr;
309 p->o_res.dir_attr = &p->dir_attr;
Trond Myklebustc1d51932008-04-07 13:20:54 -0400310 p->o_res.seqid = p->o_arg.seqid;
311 p->c_res.seqid = p->c_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400312 p->o_res.server = p->o_arg.server;
313 nfs_fattr_init(&p->f_attr);
314 nfs_fattr_init(&p->dir_attr);
315}
316
Trond Myklebustad389da2007-06-05 12:30:00 -0400317static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500318 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100319 const struct iattr *attrs)
320{
Trond Myklebustad389da2007-06-05 12:30:00 -0400321 struct dentry *parent = dget_parent(path->dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100322 struct inode *dir = parent->d_inode;
323 struct nfs_server *server = NFS_SERVER(dir);
324 struct nfs4_opendata *p;
325
326 p = kzalloc(sizeof(*p), GFP_KERNEL);
327 if (p == NULL)
328 goto err;
329 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
330 if (p->o_arg.seqid == NULL)
331 goto err_free;
Trond Myklebustad389da2007-06-05 12:30:00 -0400332 p->path.mnt = mntget(path->mnt);
333 p->path.dentry = dget(path->dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100334 p->dir = parent;
335 p->owner = sp;
336 atomic_inc(&sp->so_count);
337 p->o_arg.fh = NFS_FH(dir);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500338 p->o_arg.open_flags = flags;
339 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
David Howells7539bba2006-08-22 20:06:09 -0400340 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400341 p->o_arg.id = sp->so_owner_id.id;
Trond Myklebustad389da2007-06-05 12:30:00 -0400342 p->o_arg.name = &p->path.dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100343 p->o_arg.server = server;
344 p->o_arg.bitmask = server->attr_bitmask;
345 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100346 if (flags & O_EXCL) {
347 u32 *s = (u32 *) p->o_arg.u.verifier.data;
348 s[0] = jiffies;
349 s[1] = current->pid;
350 } else if (flags & O_CREAT) {
351 p->o_arg.u.attrs = &p->attrs;
352 memcpy(&p->attrs, attrs, sizeof(p->attrs));
353 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100354 p->c_arg.fh = &p->o_res.fh;
355 p->c_arg.stateid = &p->o_res.stateid;
356 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400357 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400358 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100359 return p;
360err_free:
361 kfree(p);
362err:
363 dput(parent);
364 return NULL;
365}
366
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400367static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100368{
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400369 struct nfs4_opendata *p = container_of(kref,
370 struct nfs4_opendata, kref);
371
372 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400373 if (p->state != NULL)
374 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400375 nfs4_put_state_owner(p->owner);
376 dput(p->dir);
Jan Blunck31f31db12008-05-02 13:42:45 -0700377 path_put(&p->path);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400378 kfree(p);
379}
380
381static void nfs4_opendata_put(struct nfs4_opendata *p)
382{
383 if (p != NULL)
384 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100385}
386
Trond Myklebust06f814a2006-01-03 09:55:07 +0100387static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
388{
Trond Myklebust06f814a2006-01-03 09:55:07 +0100389 int ret;
390
Trond Myklebust06f814a2006-01-03 09:55:07 +0100391 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +0100392 return ret;
393}
394
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500395static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
Trond Myklebust6ee41262007-07-08 14:11:36 -0400396{
397 int ret = 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500398
399 if (open_mode & O_EXCL)
400 goto out;
401 switch (mode & (FMODE_READ|FMODE_WRITE)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -0400402 case FMODE_READ:
403 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -0400404 break;
405 case FMODE_WRITE:
406 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -0400407 break;
408 case FMODE_READ|FMODE_WRITE:
409 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
410 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500411out:
Trond Myklebust6ee41262007-07-08 14:11:36 -0400412 return ret;
413}
414
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500415static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -0400416{
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500417 if ((delegation->type & fmode) != fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -0400418 return 0;
Trond Myklebust15c831b2008-12-23 15:21:39 -0500419 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
Trond Myklebustaac00a82007-07-05 19:02:21 -0400420 return 0;
Trond Myklebustb7391f42008-12-23 15:21:52 -0500421 nfs_mark_delegation_referenced(delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400422 return 1;
423}
424
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500425static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
Trond Myklebuste7616922006-01-03 09:55:13 +0100426{
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500427 switch (fmode) {
Trond Myklebuste7616922006-01-03 09:55:13 +0100428 case FMODE_WRITE:
429 state->n_wronly++;
430 break;
431 case FMODE_READ:
432 state->n_rdonly++;
433 break;
434 case FMODE_READ|FMODE_WRITE:
435 state->n_rdwr++;
436 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500437 nfs4_state_set_mode_locked(state, state->state | fmode);
Trond Myklebuste7616922006-01-03 09:55:13 +0100438}
439
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500440static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
Trond Myklebust003707c2007-07-05 18:07:55 -0400441{
442 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
443 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
444 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500445 switch (fmode) {
Trond Myklebust003707c2007-07-05 18:07:55 -0400446 case FMODE_READ:
447 set_bit(NFS_O_RDONLY_STATE, &state->flags);
448 break;
449 case FMODE_WRITE:
450 set_bit(NFS_O_WRONLY_STATE, &state->flags);
451 break;
452 case FMODE_READ|FMODE_WRITE:
453 set_bit(NFS_O_RDWR_STATE, &state->flags);
454 }
455}
456
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500457static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
Trond Myklebust003707c2007-07-05 18:07:55 -0400458{
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400459 write_seqlock(&state->seqlock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500460 nfs_set_open_stateid_locked(state, stateid, fmode);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400461 write_sequnlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400462}
463
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500464static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400466 /*
467 * Protect the call to nfs4_state_set_mode_locked and
468 * serialise the stateid update
469 */
470 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -0400471 if (deleg_stateid != NULL) {
472 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
473 set_bit(NFS_DELEGATED_STATE, &state->flags);
474 }
475 if (open_stateid != NULL)
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500476 nfs_set_open_stateid_locked(state, open_stateid, fmode);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400477 write_sequnlock(&state->seqlock);
478 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500479 update_open_stateflags(state, fmode);
Trond Myklebustec073422005-10-20 14:22:47 -0700480 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481}
482
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500483static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
Trond Myklebust34310432008-12-23 15:21:38 -0500484{
485 struct nfs_inode *nfsi = NFS_I(state->inode);
486 struct nfs_delegation *deleg_cur;
487 int ret = 0;
488
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500489 fmode &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust34310432008-12-23 15:21:38 -0500490
491 rcu_read_lock();
492 deleg_cur = rcu_dereference(nfsi->delegation);
493 if (deleg_cur == NULL)
494 goto no_delegation;
495
496 spin_lock(&deleg_cur->lock);
497 if (nfsi->delegation != deleg_cur ||
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500498 (deleg_cur->type & fmode) != fmode)
Trond Myklebust34310432008-12-23 15:21:38 -0500499 goto no_delegation_unlock;
500
501 if (delegation == NULL)
502 delegation = &deleg_cur->stateid;
503 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
504 goto no_delegation_unlock;
505
Trond Myklebustb7391f42008-12-23 15:21:52 -0500506 nfs_mark_delegation_referenced(deleg_cur);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500507 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -0500508 ret = 1;
509no_delegation_unlock:
510 spin_unlock(&deleg_cur->lock);
511no_delegation:
512 rcu_read_unlock();
513
514 if (!ret && open_stateid != NULL) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500515 __update_open_stateid(state, open_stateid, NULL, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -0500516 ret = 1;
517 }
518
519 return ret;
520}
521
522
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500523static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -0400524{
525 struct nfs_delegation *delegation;
526
527 rcu_read_lock();
528 delegation = rcu_dereference(NFS_I(inode)->delegation);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500529 if (delegation == NULL || (delegation->type & fmode) == fmode) {
Trond Myklebustaac00a82007-07-05 19:02:21 -0400530 rcu_read_unlock();
531 return;
532 }
533 rcu_read_unlock();
534 nfs_inode_return_delegation(inode);
535}
536
Trond Myklebust6ee41262007-07-08 14:11:36 -0400537static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -0400538{
539 struct nfs4_state *state = opendata->state;
540 struct nfs_inode *nfsi = NFS_I(state->inode);
541 struct nfs_delegation *delegation;
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500542 int open_mode = opendata->o_arg.open_flags & O_EXCL;
543 fmode_t fmode = opendata->o_arg.fmode;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400544 nfs4_stateid stateid;
545 int ret = -EAGAIN;
546
Trond Myklebustaac00a82007-07-05 19:02:21 -0400547 for (;;) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500548 if (can_open_cached(state, fmode, open_mode)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -0400549 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500550 if (can_open_cached(state, fmode, open_mode)) {
551 update_open_stateflags(state, fmode);
Trond Myklebust6ee41262007-07-08 14:11:36 -0400552 spin_unlock(&state->owner->so_lock);
Trond Myklebust6ee41262007-07-08 14:11:36 -0400553 goto out_return_state;
554 }
555 spin_unlock(&state->owner->so_lock);
556 }
Trond Myklebust34310432008-12-23 15:21:38 -0500557 rcu_read_lock();
558 delegation = rcu_dereference(nfsi->delegation);
559 if (delegation == NULL ||
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500560 !can_open_delegated(delegation, fmode)) {
Trond Myklebust34310432008-12-23 15:21:38 -0500561 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -0400562 break;
Trond Myklebust34310432008-12-23 15:21:38 -0500563 }
Trond Myklebustaac00a82007-07-05 19:02:21 -0400564 /* Save the delegation */
565 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
566 rcu_read_unlock();
Trond Myklebustaf22f942007-08-10 17:45:10 -0400567 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400568 if (ret != 0)
569 goto out;
570 ret = -EAGAIN;
Trond Myklebust34310432008-12-23 15:21:38 -0500571
572 /* Try to update the stateid using the delegation */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500573 if (update_open_stateid(state, NULL, &stateid, fmode))
Trond Myklebust34310432008-12-23 15:21:38 -0500574 goto out_return_state;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400575 }
Trond Myklebustaac00a82007-07-05 19:02:21 -0400576out:
577 return ERR_PTR(ret);
578out_return_state:
579 atomic_inc(&state->count);
580 return state;
581}
582
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100583static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
584{
585 struct inode *inode;
586 struct nfs4_state *state = NULL;
Trond Myklebust003707c2007-07-05 18:07:55 -0400587 struct nfs_delegation *delegation;
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400588 int ret;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100589
Trond Myklebustaac00a82007-07-05 19:02:21 -0400590 if (!data->rpc_done) {
Trond Myklebust6ee41262007-07-08 14:11:36 -0400591 state = nfs4_try_open_cached(data);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400592 goto out;
593 }
594
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400595 ret = -EAGAIN;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100596 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400597 goto err;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100598 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400599 ret = PTR_ERR(inode);
Trond Myklebust03f28e32006-03-20 13:44:48 -0500600 if (IS_ERR(inode))
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400601 goto err;
602 ret = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100603 state = nfs4_get_open_state(inode, data->owner);
604 if (state == NULL)
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400605 goto err_put_inode;
Trond Myklebust549d6ed2007-07-03 16:42:45 -0400606 if (data->o_res.delegation_type != 0) {
Trond Myklebust549d6ed2007-07-03 16:42:45 -0400607 int delegation_flags = 0;
608
Trond Myklebust003707c2007-07-05 18:07:55 -0400609 rcu_read_lock();
610 delegation = rcu_dereference(NFS_I(inode)->delegation);
611 if (delegation)
612 delegation_flags = delegation->flags;
613 rcu_read_unlock();
Trond Myklebust15c831b2008-12-23 15:21:39 -0500614 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
Trond Myklebust549d6ed2007-07-03 16:42:45 -0400615 nfs_inode_set_delegation(state->inode,
616 data->owner->so_cred,
617 &data->o_res);
618 else
619 nfs_inode_reclaim_delegation(state->inode,
620 data->owner->so_cred,
621 &data->o_res);
622 }
Trond Myklebust34310432008-12-23 15:21:38 -0500623
624 update_open_stateid(state, &data->o_res.stateid, NULL,
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500625 data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100626 iput(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -0400627out:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100628 return state;
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400629err_put_inode:
630 iput(inode);
631err:
632 return ERR_PTR(ret);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100633}
634
Trond Myklebust864472e2006-01-03 09:55:15 +0100635static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
636{
637 struct nfs_inode *nfsi = NFS_I(state->inode);
638 struct nfs_open_context *ctx;
639
640 spin_lock(&state->inode->i_lock);
641 list_for_each_entry(ctx, &nfsi->open_files, list) {
642 if (ctx->state != state)
643 continue;
644 get_nfs_open_context(ctx);
645 spin_unlock(&state->inode->i_lock);
646 return ctx;
647 }
648 spin_unlock(&state->inode->i_lock);
649 return ERR_PTR(-ENOENT);
650}
651
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400652static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
653{
654 struct nfs4_opendata *opendata;
655
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500656 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400657 if (opendata == NULL)
658 return ERR_PTR(-ENOMEM);
659 opendata->state = state;
660 atomic_inc(&state->count);
661 return opendata;
662}
663
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500664static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
Trond Myklebust864472e2006-01-03 09:55:15 +0100665{
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400666 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +0100667 int ret;
668
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500669 opendata->o_arg.open_flags = 0;
670 opendata->o_arg.fmode = fmode;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400671 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
672 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
673 nfs4_init_opendata_res(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100674 ret = _nfs4_proc_open(opendata);
675 if (ret != 0)
676 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400677 newstate = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400678 if (IS_ERR(newstate))
679 return PTR_ERR(newstate);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500680 nfs4_close_state(&opendata->path, newstate, fmode);
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400681 *res = newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +0100682 return 0;
683}
684
685static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
686{
Trond Myklebust864472e2006-01-03 09:55:15 +0100687 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +0100688 int ret;
689
690 /* memory barrier prior to reading state->n_* */
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400691 clear_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +0100692 smp_rmb();
693 if (state->n_rdwr != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400694 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +0100695 if (ret != 0)
696 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400697 if (newstate != state)
698 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +0100699 }
700 if (state->n_wronly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400701 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +0100702 if (ret != 0)
703 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400704 if (newstate != state)
705 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +0100706 }
707 if (state->n_rdonly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400708 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +0100709 if (ret != 0)
710 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400711 if (newstate != state)
712 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +0100713 }
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400714 /*
715 * We may have performed cached opens for all three recoveries.
716 * Check if we need to update the current stateid.
717 */
718 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
719 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400720 write_seqlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400721 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
722 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400723 write_sequnlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400724 }
Trond Myklebust864472e2006-01-03 09:55:15 +0100725 return 0;
726}
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728/*
729 * OPEN_RECLAIM:
730 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 */
Trond Myklebust539cd032007-06-05 11:46:42 -0400732static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733{
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400734 struct nfs_delegation *delegation;
Trond Myklebust864472e2006-01-03 09:55:15 +0100735 struct nfs4_opendata *opendata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500736 fmode_t delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 int status;
738
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400739 opendata = nfs4_open_recoverdata_alloc(ctx, state);
740 if (IS_ERR(opendata))
741 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100742 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
743 opendata->o_arg.fh = NFS_FH(state->inode);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400744 rcu_read_lock();
745 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust15c831b2008-12-23 15:21:39 -0500746 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
Trond Myklebust65bbf6b2007-08-27 09:57:46 -0400747 delegation_type = delegation->type;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -0400748 rcu_read_unlock();
Trond Myklebust864472e2006-01-03 09:55:15 +0100749 opendata->o_arg.u.delegation_type = delegation_type;
750 status = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400751 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 return status;
753}
754
Trond Myklebust539cd032007-06-05 11:46:42 -0400755static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756{
757 struct nfs_server *server = NFS_SERVER(state->inode);
758 struct nfs4_exception exception = { };
759 int err;
760 do {
Trond Myklebust539cd032007-06-05 11:46:42 -0400761 err = _nfs4_do_open_reclaim(ctx, state);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000762 if (err != -NFS4ERR_DELAY)
763 break;
764 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 } while (exception.retry);
766 return err;
767}
768
Trond Myklebust864472e2006-01-03 09:55:15 +0100769static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
770{
771 struct nfs_open_context *ctx;
772 int ret;
773
774 ctx = nfs4_state_find_open_context(state);
775 if (IS_ERR(ctx))
776 return PTR_ERR(ctx);
Trond Myklebust539cd032007-06-05 11:46:42 -0400777 ret = nfs4_do_open_reclaim(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +0100778 put_nfs_open_context(ctx);
779 return ret;
780}
781
Trond Myklebust13437e12007-07-06 15:10:43 -0400782static 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 -0700783{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100784 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +0100785 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400787 opendata = nfs4_open_recoverdata_alloc(ctx, state);
788 if (IS_ERR(opendata))
789 return PTR_ERR(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100790 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
Trond Myklebust13437e12007-07-06 15:10:43 -0400791 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100792 sizeof(opendata->o_arg.u.delegation.data));
Trond Myklebust864472e2006-01-03 09:55:15 +0100793 ret = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400794 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100795 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796}
797
Trond Myklebust13437e12007-07-06 15:10:43 -0400798int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799{
800 struct nfs4_exception exception = { };
Trond Myklebust539cd032007-06-05 11:46:42 -0400801 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 int err;
803 do {
Trond Myklebust13437e12007-07-06 15:10:43 -0400804 err = _nfs4_open_delegation_recall(ctx, state, stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 switch (err) {
806 case 0:
807 return err;
808 case -NFS4ERR_STALE_CLIENTID:
809 case -NFS4ERR_STALE_STATEID:
810 case -NFS4ERR_EXPIRED:
811 /* Don't recall a delegation if it was lost */
David Howells7539bba2006-08-22 20:06:09 -0400812 nfs4_schedule_state_recovery(server->nfs_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 return err;
814 }
815 err = nfs4_handle_exception(server, err, &exception);
816 } while (exception.retry);
817 return err;
818}
819
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100820static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
821{
822 struct nfs4_opendata *data = calldata;
823
824 data->rpc_status = task->tk_status;
825 if (RPC_ASSASSINATED(task))
826 return;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100827 if (data->rpc_status == 0) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100828 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
829 sizeof(data->o_res.stateid.data));
Trond Myklebustbb226292008-01-02 15:19:18 -0500830 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +0100831 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust3e309912007-07-07 13:19:59 -0400832 data->rpc_done = 1;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100833 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100834}
835
836static void nfs4_open_confirm_release(void *calldata)
837{
838 struct nfs4_opendata *data = calldata;
839 struct nfs4_state *state = NULL;
840
841 /* If this request hasn't been cancelled, do nothing */
842 if (data->cancelled == 0)
843 goto out_free;
844 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -0400845 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100846 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100847 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400848 if (!IS_ERR(state))
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500849 nfs4_close_state(&data->path, state, data->o_arg.fmode);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100850out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400851 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100852}
853
854static const struct rpc_call_ops nfs4_open_confirm_ops = {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100855 .rpc_call_done = nfs4_open_confirm_done,
856 .rpc_release = nfs4_open_confirm_release,
857};
858
859/*
860 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
861 */
862static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
863{
864 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
865 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400866 struct rpc_message msg = {
867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
868 .rpc_argp = &data->c_arg,
869 .rpc_resp = &data->c_res,
870 .rpc_cred = data->owner->so_cred,
871 };
Trond Myklebustc970aa82007-07-14 15:39:59 -0400872 struct rpc_task_setup task_setup_data = {
873 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -0400874 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400875 .callback_ops = &nfs4_open_confirm_ops,
876 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -0500877 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -0400878 .flags = RPC_TASK_ASYNC,
879 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 int status;
881
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400882 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -0400883 data->rpc_done = 0;
884 data->rpc_status = 0;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400885 data->timestamp = jiffies;
Trond Myklebustc970aa82007-07-14 15:39:59 -0400886 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500887 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100888 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100889 status = nfs4_wait_for_completion_rpc_task(task);
890 if (status != 0) {
891 data->cancelled = 1;
892 smp_wmb();
893 } else
894 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -0500895 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 return status;
897}
898
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100899static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900{
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100901 struct nfs4_opendata *data = calldata;
902 struct nfs4_state_owner *sp = data->owner;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400903
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100904 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
905 return;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400906 /*
907 * Check if we still need to send an OPEN call, or if we can use
908 * a delegation instead.
909 */
910 if (data->state != NULL) {
911 struct nfs_delegation *delegation;
912
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500913 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
Trond Myklebust6ee41262007-07-08 14:11:36 -0400914 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400915 rcu_read_lock();
916 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
917 if (delegation != NULL &&
Trond Myklebust15c831b2008-12-23 15:21:39 -0500918 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
Trond Myklebustaac00a82007-07-05 19:02:21 -0400919 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -0400920 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -0400921 }
922 rcu_read_unlock();
923 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100924 /* Update sequence id. */
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400925 data->o_arg.id = sp->so_owner_id.id;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100926 data->o_arg.clientid = sp->so_client->cl_clientid;
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400927 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
Trond Myklebust5138fde2007-07-14 15:40:01 -0400928 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust6f220ed2007-07-17 21:50:45 -0400929 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
930 }
Trond Myklebust26e976a2006-01-03 09:55:21 +0100931 data->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -0400932 rpc_call_start(task);
Trond Myklebust6ee41262007-07-08 14:11:36 -0400933 return;
934out_no_action:
935 task->tk_action = NULL;
936
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100937}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100939static void nfs4_open_done(struct rpc_task *task, void *calldata)
940{
941 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100943 data->rpc_status = task->tk_status;
944 if (RPC_ASSASSINATED(task))
945 return;
946 if (task->tk_status == 0) {
947 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -0700948 case S_IFREG:
949 break;
950 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100951 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700952 break;
953 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100954 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700955 break;
956 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100957 data->rpc_status = -ENOTDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700958 }
Trond Myklebust26e976a2006-01-03 09:55:21 +0100959 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust0f9f95e2007-07-08 16:19:56 -0400960 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
961 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust6f926b52005-10-18 14:20:18 -0700962 }
Trond Myklebust3e309912007-07-07 13:19:59 -0400963 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100964}
Trond Myklebust6f926b52005-10-18 14:20:18 -0700965
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100966static void nfs4_open_release(void *calldata)
967{
968 struct nfs4_opendata *data = calldata;
969 struct nfs4_state *state = NULL;
970
971 /* If this request hasn't been cancelled, do nothing */
972 if (data->cancelled == 0)
973 goto out_free;
974 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -0400975 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100976 goto out_free;
977 /* In case we need an open_confirm, no cleanup! */
978 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
979 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100980 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -0400981 if (!IS_ERR(state))
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500982 nfs4_close_state(&data->path, state, data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100983out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -0400984 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100985}
986
987static const struct rpc_call_ops nfs4_open_ops = {
988 .rpc_call_prepare = nfs4_open_prepare,
989 .rpc_call_done = nfs4_open_done,
990 .rpc_release = nfs4_open_release,
991};
992
993/*
994 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
995 */
996static int _nfs4_proc_open(struct nfs4_opendata *data)
997{
998 struct inode *dir = data->dir->d_inode;
999 struct nfs_server *server = NFS_SERVER(dir);
1000 struct nfs_openargs *o_arg = &data->o_arg;
1001 struct nfs_openres *o_res = &data->o_res;
1002 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001003 struct rpc_message msg = {
1004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1005 .rpc_argp = o_arg,
1006 .rpc_resp = o_res,
1007 .rpc_cred = data->owner->so_cred,
1008 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001009 struct rpc_task_setup task_setup_data = {
1010 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001011 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001012 .callback_ops = &nfs4_open_ops,
1013 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001014 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001015 .flags = RPC_TASK_ASYNC,
1016 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001017 int status;
1018
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001019 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001020 data->rpc_done = 0;
1021 data->rpc_status = 0;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001022 data->cancelled = 0;
Trond Myklebustc970aa82007-07-14 15:39:59 -04001023 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05001024 if (IS_ERR(task))
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001025 return PTR_ERR(task);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001026 status = nfs4_wait_for_completion_rpc_task(task);
1027 if (status != 0) {
1028 data->cancelled = 1;
1029 smp_wmb();
1030 } else
1031 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05001032 rpc_put_task(task);
Trond Myklebust3e309912007-07-07 13:19:59 -04001033 if (status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001034 return status;
1035
Trond Myklebust99367812007-07-17 21:52:41 -04001036 if (o_res->fh.size == 0)
1037 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1038
Trond Myklebust56ae19f2005-10-27 22:12:40 -04001039 if (o_arg->open_flags & O_CREAT) {
1040 update_changeattr(dir, &o_res->cinfo);
1041 nfs_post_op_update_inode(dir, o_res->dir_attr);
1042 } else
1043 nfs_refresh_inode(dir, o_res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001045 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001047 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 }
1049 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Trond Myklebust99367812007-07-17 21:52:41 -04001050 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001051 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052}
1053
Trond Myklebust10afec92007-05-14 17:16:04 -04001054static int nfs4_recover_expired_lease(struct nfs_server *server)
Trond Myklebust58d97142006-01-03 09:55:24 +01001055{
David Howells7539bba2006-08-22 20:06:09 -04001056 struct nfs_client *clp = server->nfs_client;
Trond Myklebust6b309542006-09-14 14:03:14 -04001057 int ret;
Trond Myklebust58d97142006-01-03 09:55:24 +01001058
Trond Myklebust6b309542006-09-14 14:03:14 -04001059 for (;;) {
Trond Myklebust65de8722008-12-23 15:21:44 -05001060 ret = nfs4_wait_clnt_recover(clp);
Trond Myklebust6b309542006-09-14 14:03:14 -04001061 if (ret != 0)
1062 return ret;
Trond Myklebuste598d842008-12-23 15:21:42 -05001063 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1064 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
Trond Myklebust6b309542006-09-14 14:03:14 -04001065 break;
Trond Myklebust58d97142006-01-03 09:55:24 +01001066 nfs4_schedule_state_recovery(clp);
Trond Myklebust6b309542006-09-14 14:03:14 -04001067 }
1068 return 0;
Trond Myklebust58d97142006-01-03 09:55:24 +01001069}
1070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071/*
1072 * OPEN_EXPIRED:
1073 * reclaim state on the server after a network partition.
1074 * Assumes caller holds the appropriate lock
1075 */
Trond Myklebust539cd032007-06-05 11:46:42 -04001076static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077{
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001078 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +01001079 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001081 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1082 if (IS_ERR(opendata))
1083 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01001084 ret = nfs4_open_recover(opendata, state);
Trond Myklebust35d05772008-04-05 15:54:17 -04001085 if (ret == -ESTALE)
Trond Myklebust539cd032007-06-05 11:46:42 -04001086 d_drop(ctx->path.dentry);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001087 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01001088 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089}
1090
Trond Myklebust539cd032007-06-05 11:46:42 -04001091static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +00001092{
Trond Myklebust539cd032007-06-05 11:46:42 -04001093 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +00001094 struct nfs4_exception exception = { };
1095 int err;
1096
1097 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04001098 err = _nfs4_open_expired(ctx, state);
Trond Myklebust027b6ca2008-12-23 16:04:13 -05001099 if (err != -NFS4ERR_DELAY)
1100 break;
1101 nfs4_handle_exception(server, err, &exception);
Trond Myklebust202b50d2005-06-22 17:16:29 +00001102 } while (exception.retry);
1103 return err;
1104}
1105
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1107{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01001109 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Trond Myklebust864472e2006-01-03 09:55:15 +01001111 ctx = nfs4_state_find_open_context(state);
1112 if (IS_ERR(ctx))
1113 return PTR_ERR(ctx);
Trond Myklebust539cd032007-06-05 11:46:42 -04001114 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001115 put_nfs_open_context(ctx);
1116 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117}
1118
1119/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001120 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1121 * fields corresponding to attributes that were used to store the verifier.
1122 * Make sure we clobber those fields in the later setattr call
1123 */
1124static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1125{
1126 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1127 !(sattr->ia_valid & ATTR_ATIME_SET))
1128 sattr->ia_valid |= ATTR_ATIME;
1129
1130 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1131 !(sattr->ia_valid & ATTR_MTIME_SET))
1132 sattr->ia_valid |= ATTR_MTIME;
1133}
1134
1135/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001136 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 */
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001138static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139{
1140 struct nfs4_state_owner *sp;
1141 struct nfs4_state *state = NULL;
1142 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001143 struct nfs4_opendata *opendata;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001144 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
1146 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 status = -ENOMEM;
1148 if (!(sp = nfs4_get_state_owner(server, cred))) {
1149 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1150 goto out_err;
1151 }
Trond Myklebust58d97142006-01-03 09:55:24 +01001152 status = nfs4_recover_expired_lease(server);
1153 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01001154 goto err_put_state_owner;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001155 if (path->dentry->d_inode != NULL)
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001156 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
Trond Myklebust58d97142006-01-03 09:55:24 +01001157 status = -ENOMEM;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001158 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001159 if (opendata == NULL)
Trond Myklebust95d35cb2008-12-23 15:21:45 -05001160 goto err_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
Trond Myklebustaac00a82007-07-05 19:02:21 -04001162 if (path->dentry->d_inode != NULL)
1163 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1164
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001165 status = _nfs4_proc_open(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 if (status != 0)
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001167 goto err_opendata_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
Jeff Laytonaa53ed52007-06-05 14:49:03 -04001169 if (opendata->o_arg.open_flags & O_EXCL)
1170 nfs4_exclusive_attrset(opendata, sattr);
1171
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001172 state = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001173 status = PTR_ERR(state);
1174 if (IS_ERR(state))
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001175 goto err_opendata_put;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001176 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 *res = state;
1179 return 0;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001180err_opendata_put:
1181 nfs4_opendata_put(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001182err_put_state_owner:
1183 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 *res = NULL;
1186 return status;
1187}
1188
1189
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001190static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191{
1192 struct nfs4_exception exception = { };
1193 struct nfs4_state *res;
1194 int status;
1195
1196 do {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001197 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 if (status == 0)
1199 break;
1200 /* NOTE: BAD_SEQID means the server and client disagree about the
1201 * book-keeping w.r.t. state-changing operations
1202 * (OPEN/CLOSE/LOCK/LOCKU...)
1203 * It is actually a sign of a bug on the client or on the server.
1204 *
1205 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001206 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 * have unhashed the old state_owner for us, and that we can
1208 * therefore safely retry using a new one. We should still warn
1209 * the user though...
1210 */
1211 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04001212 printk(KERN_WARNING "NFS: v4 server %s "
1213 " returned a bad sequence-id error!\n",
1214 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 exception.retry = 1;
1216 continue;
1217 }
Trond Myklebust550f5742005-10-18 14:20:21 -07001218 /*
1219 * BAD_STATEID on OPEN means that the server cancelled our
1220 * state before it received the OPEN_CONFIRM.
1221 * Recover by retrying the request as per the discussion
1222 * on Page 181 of RFC3530.
1223 */
1224 if (status == -NFS4ERR_BAD_STATEID) {
1225 exception.retry = 1;
1226 continue;
1227 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001228 if (status == -EAGAIN) {
1229 /* We must have found a delegation */
1230 exception.retry = 1;
1231 continue;
1232 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1234 status, &exception));
1235 } while (exception.retry);
1236 return res;
1237}
1238
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001239static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1240 struct nfs_fattr *fattr, struct iattr *sattr,
1241 struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001243 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001245 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 .iap = sattr,
1247 .server = server,
1248 .bitmask = server->attr_bitmask,
1249 };
1250 struct nfs_setattrres res = {
1251 .fattr = fattr,
1252 .server = server,
1253 };
1254 struct rpc_message msg = {
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1256 .rpc_argp = &arg,
1257 .rpc_resp = &res,
1258 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01001260 unsigned long timestamp = jiffies;
Trond Myklebust65e43082005-08-16 11:49:44 -04001261 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262
Trond Myklebust0e574af2005-10-27 22:12:38 -04001263 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001265 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1266 /* Use that stateid */
1267 } else if (state != NULL) {
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001268 nfs4_copy_stateid(&arg.stateid, state, current->files);
1269 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1271
Trond Myklebust65e43082005-08-16 11:49:44 -04001272 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001273 if (status == 0 && state != NULL)
1274 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04001275 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276}
1277
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001278static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1279 struct nfs_fattr *fattr, struct iattr *sattr,
1280 struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001282 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 struct nfs4_exception exception = { };
1284 int err;
1285 do {
1286 err = nfs4_handle_exception(server,
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001287 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 &exception);
1289 } while (exception.retry);
1290 return err;
1291}
1292
1293struct nfs4_closedata {
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001294 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 struct inode *inode;
1296 struct nfs4_state *state;
1297 struct nfs_closeargs arg;
1298 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001299 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001300 unsigned long timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301};
1302
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001303static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07001304{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001305 struct nfs4_closedata *calldata = data;
1306 struct nfs4_state_owner *sp = calldata->state->owner;
Trond Myklebust95121352005-10-18 14:20:12 -07001307
1308 nfs4_put_open_state(calldata->state);
1309 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001310 nfs4_put_state_owner(sp);
Jan Blunck31f31db12008-05-02 13:42:45 -07001311 path_put(&calldata->path);
Trond Myklebust95121352005-10-18 14:20:12 -07001312 kfree(calldata);
1313}
1314
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001315static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001317 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 struct nfs_server *server = NFS_SERVER(calldata->inode);
1320
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001321 if (RPC_ASSASSINATED(task))
1322 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 /* hmm. we are done with the inode, and in the process of freeing
1324 * the state_owner. we keep this around to process errors
1325 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 switch (task->tk_status) {
1327 case 0:
Trond Myklebust45328c32007-07-26 17:47:34 -04001328 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001329 renew_lease(server, calldata->timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 break;
1331 case -NFS4ERR_STALE_STATEID:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05001332 case -NFS4ERR_OLD_STATEID:
1333 case -NFS4ERR_BAD_STATEID:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 case -NFS4ERR_EXPIRED:
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001335 if (calldata->arg.fmode == 0)
Trond Myklebust9e33bed2008-12-23 15:21:46 -05001336 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 default:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05001338 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 rpc_restart_call(task);
1340 return;
1341 }
1342 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001343 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344}
1345
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001346static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001348 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07001349 struct nfs4_state *state = calldata->state;
Trond Myklebust003707c2007-07-05 18:07:55 -04001350 int clear_rd, clear_wr, clear_rdwr;
Trond Myklebust95121352005-10-18 14:20:12 -07001351
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001352 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebust95121352005-10-18 14:20:12 -07001353 return;
Trond Myklebust003707c2007-07-05 18:07:55 -04001354
Trond Myklebust003707c2007-07-05 18:07:55 -04001355 clear_rd = clear_wr = clear_rdwr = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05001356 spin_lock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001357 /* Calculate the change in open mode */
Trond Myklebuste7616922006-01-03 09:55:13 +01001358 if (state->n_rdwr == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001359 if (state->n_rdonly == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001360 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1361 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1362 }
1363 if (state->n_wronly == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001364 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1365 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1366 }
Trond Myklebuste7616922006-01-03 09:55:13 +01001367 }
Trond Myklebust4cecb762005-11-04 15:32:58 -05001368 spin_unlock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001369 if (!clear_rd && !clear_wr && !clear_rdwr) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001370 /* Note: exit _without_ calling nfs4_close_done */
1371 task->tk_action = NULL;
Trond Myklebust95121352005-10-18 14:20:12 -07001372 return;
1373 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001374 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust45328c32007-07-26 17:47:34 -04001375 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
Trond Myklebust5138fde2007-07-14 15:40:01 -04001376 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001377 calldata->arg.fmode = FMODE_READ;
Trond Myklebust45328c32007-07-26 17:47:34 -04001378 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
Trond Myklebust5138fde2007-07-14 15:40:01 -04001379 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001380 calldata->arg.fmode = FMODE_WRITE;
Trond Myklebust45328c32007-07-26 17:47:34 -04001381 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001382 calldata->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001383 rpc_call_start(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384}
1385
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001386static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001387 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001388 .rpc_call_done = nfs4_close_done,
1389 .rpc_release = nfs4_free_closedata,
1390};
1391
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392/*
1393 * It is possible for data to be read/written from a mem-mapped file
1394 * after the sys_close call (which hits the vfs layer as a flush).
1395 * This means that we can't safely call nfsv4 close on a file until
1396 * the inode is cleared. This in turn means that we are not good
1397 * NFSv4 citizens - we do not indicate to the server to update the file's
1398 * share state even when we are done with one of the three share
1399 * stateid's in the inode.
1400 *
1401 * NOTE: Caller must be holding the sp->so_owner semaphore!
1402 */
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001403int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001405 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04001407 struct nfs4_state_owner *sp = state->owner;
1408 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001409 struct rpc_message msg = {
1410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1411 .rpc_cred = state->owner->so_cred,
1412 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001413 struct rpc_task_setup task_setup_data = {
1414 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001415 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001416 .callback_ops = &nfs4_close_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05001417 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001418 .flags = RPC_TASK_ASYNC,
1419 };
Trond Myklebust95121352005-10-18 14:20:12 -07001420 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Trond Myklebust95121352005-10-18 14:20:12 -07001422 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07001424 goto out;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001425 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001427 calldata->arg.fh = NFS_FH(state->inode);
Trond Myklebust003707c2007-07-05 18:07:55 -04001428 calldata->arg.stateid = &state->open_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429 /* Serialization for the sequence id */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001430 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001431 if (calldata->arg.seqid == NULL)
1432 goto out_free_calldata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001433 calldata->arg.fmode = 0;
Trond Myklebusta65318b2009-03-11 14:10:28 -04001434 calldata->arg.bitmask = server->cache_consistency_bitmask;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001435 calldata->res.fattr = &calldata->fattr;
Trond Myklebustc1d51932008-04-07 13:20:54 -04001436 calldata->res.seqid = calldata->arg.seqid;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001437 calldata->res.server = server;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001438 calldata->path.mnt = mntget(path->mnt);
1439 calldata->path.dentry = dget(path->dentry);
Trond Myklebust95121352005-10-18 14:20:12 -07001440
Trond Myklebust5138fde2007-07-14 15:40:01 -04001441 msg.rpc_argp = &calldata->arg,
1442 msg.rpc_resp = &calldata->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001443 task_setup_data.callback_data = calldata;
1444 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04001445 if (IS_ERR(task))
1446 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001447 status = 0;
1448 if (wait)
1449 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04001450 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04001451 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07001452out_free_calldata:
1453 kfree(calldata);
1454out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04001455 nfs4_put_open_state(state);
1456 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07001457 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458}
1459
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001460static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
Trond Myklebust02a913a2005-10-18 14:20:17 -07001461{
1462 struct file *filp;
Trond Myklebust1b45c462007-07-03 13:04:56 -04001463 int ret;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001464
Trond Myklebust1b45c462007-07-03 13:04:56 -04001465 /* If the open_intent is for execute, we have an extra check to make */
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001466 if (fmode & FMODE_EXEC) {
Trond Myklebustaf22f942007-08-10 17:45:10 -04001467 ret = nfs_may_open(state->inode,
Trond Myklebust1b45c462007-07-03 13:04:56 -04001468 state->owner->so_cred,
1469 nd->intent.open.flags);
1470 if (ret < 0)
1471 goto out_close;
1472 }
Trond Myklebust4a35bd42007-06-05 10:31:33 -04001473 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001474 if (!IS_ERR(filp)) {
1475 struct nfs_open_context *ctx;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04001476 ctx = nfs_file_open_context(filp);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001477 ctx->state = state;
Trond Myklebust95cf9592006-04-18 13:14:06 -04001478 return 0;
1479 }
Trond Myklebust1b45c462007-07-03 13:04:56 -04001480 ret = PTR_ERR(filp);
1481out_close:
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001482 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
Trond Myklebust1b45c462007-07-03 13:04:56 -04001483 return ret;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001484}
1485
1486struct dentry *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1488{
Trond Myklebustad389da2007-06-05 12:30:00 -04001489 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001490 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001491 .dentry = dentry,
1492 };
Jan Blunck4ac91372008-02-14 19:34:32 -08001493 struct dentry *parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 struct iattr attr;
1495 struct rpc_cred *cred;
1496 struct nfs4_state *state;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001497 struct dentry *res;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001498 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499
1500 if (nd->flags & LOOKUP_CREATE) {
1501 attr.ia_mode = nd->intent.open.create_mode;
1502 attr.ia_valid = ATTR_MODE;
1503 if (!IS_POSIXACL(dir))
Al Viroce3b0f82009-03-29 19:08:22 -04001504 attr.ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 } else {
1506 attr.ia_valid = 0;
1507 BUG_ON(nd->intent.open.flags & O_CREAT);
1508 }
1509
Trond Myklebust98a8e322008-03-12 12:25:28 -04001510 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 if (IS_ERR(cred))
Trond Myklebust02a913a2005-10-18 14:20:17 -07001512 return (struct dentry *)cred;
Trond Myklebust565277f2007-10-15 18:17:53 -04001513 parent = dentry->d_parent;
1514 /* Protect against concurrent sillydeletes */
1515 nfs_block_sillyrename(parent);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001516 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001518 if (IS_ERR(state)) {
Trond Myklebustd75340c2007-10-01 21:42:01 -04001519 if (PTR_ERR(state) == -ENOENT) {
Trond Myklebust02a913a2005-10-18 14:20:17 -07001520 d_add(dentry, NULL);
Trond Myklebustd75340c2007-10-01 21:42:01 -04001521 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1522 }
Trond Myklebust565277f2007-10-15 18:17:53 -04001523 nfs_unblock_sillyrename(parent);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001524 return (struct dentry *)state;
1525 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001526 res = d_add_unique(dentry, igrab(state->inode));
Trond Myklebust02a913a2005-10-18 14:20:17 -07001527 if (res != NULL)
Trond Myklebustdeee9362007-08-27 11:33:00 -04001528 path.dentry = res;
Trond Myklebustd75340c2007-10-01 21:42:01 -04001529 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
Trond Myklebust565277f2007-10-15 18:17:53 -04001530 nfs_unblock_sillyrename(parent);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001531 nfs4_intent_set_file(nd, &path, state, fmode);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001532 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533}
1534
1535int
Trond Myklebust02a913a2005-10-18 14:20:17 -07001536nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537{
Trond Myklebustad389da2007-06-05 12:30:00 -04001538 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08001539 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04001540 .dentry = dentry,
1541 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 struct rpc_cred *cred;
1543 struct nfs4_state *state;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001544 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545
Trond Myklebust98a8e322008-03-12 12:25:28 -04001546 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 if (IS_ERR(cred))
1548 return PTR_ERR(cred);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001549 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001551 if (IS_ERR(state)) {
1552 switch (PTR_ERR(state)) {
1553 case -EPERM:
1554 case -EACCES:
1555 case -EDQUOT:
1556 case -ENOSPC:
1557 case -EROFS:
1558 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1559 return 1;
Chuck Leverb87c0ad2006-10-19 23:28:42 -07001560 default:
1561 goto out_drop;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001562 }
Trond Myklebust02a913a2005-10-18 14:20:17 -07001563 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001564 if (state->inode == dentry->d_inode) {
Trond Myklebustd75340c2007-10-01 21:42:01 -04001565 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001566 nfs4_intent_set_file(nd, &path, state, fmode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 return 1;
1568 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001569 nfs4_close_sync(&path, state, fmode);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001570out_drop:
1571 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 return 0;
1573}
1574
Trond Myklebust7fe5c392009-03-19 15:35:50 -04001575void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1576{
1577 if (ctx->state == NULL)
1578 return;
1579 if (is_sync)
1580 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1581 else
1582 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1583}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
1585static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1586{
1587 struct nfs4_server_caps_res res = {};
1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1590 .rpc_argp = fhandle,
1591 .rpc_resp = &res,
1592 };
1593 int status;
1594
1595 status = rpc_call_sync(server->client, &msg, 0);
1596 if (status == 0) {
1597 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1598 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1599 server->caps |= NFS_CAP_ACLS;
1600 if (res.has_links != 0)
1601 server->caps |= NFS_CAP_HARDLINKS;
1602 if (res.has_symlinks != 0)
1603 server->caps |= NFS_CAP_SYMLINKS;
Trond Myklebusta65318b2009-03-11 14:10:28 -04001604 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1605 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1606 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 server->acl_bitmask = res.acl_bitmask;
1608 }
1609 return status;
1610}
1611
Trond Myklebust55a97592006-06-09 09:34:19 -04001612int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613{
1614 struct nfs4_exception exception = { };
1615 int err;
1616 do {
1617 err = nfs4_handle_exception(server,
1618 _nfs4_server_capabilities(server, fhandle),
1619 &exception);
1620 } while (exception.retry);
1621 return err;
1622}
1623
1624static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1625 struct nfs_fsinfo *info)
1626{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 struct nfs4_lookup_root_arg args = {
1628 .bitmask = nfs4_fattr_bitmap,
1629 };
1630 struct nfs4_lookup_res res = {
1631 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04001632 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 .fh = fhandle,
1634 };
1635 struct rpc_message msg = {
1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1637 .rpc_argp = &args,
1638 .rpc_resp = &res,
1639 };
Trond Myklebust0e574af2005-10-27 22:12:38 -04001640 nfs_fattr_init(info->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641 return rpc_call_sync(server->client, &msg, 0);
1642}
1643
1644static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1645 struct nfs_fsinfo *info)
1646{
1647 struct nfs4_exception exception = { };
1648 int err;
1649 do {
1650 err = nfs4_handle_exception(server,
1651 _nfs4_lookup_root(server, fhandle, info),
1652 &exception);
1653 } while (exception.retry);
1654 return err;
1655}
1656
David Howells54ceac42006-08-22 20:06:13 -04001657/*
1658 * get the file handle for the "/" directory on the server
1659 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04001661 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663 int status;
1664
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 status = nfs4_lookup_root(server, fhandle, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666 if (status == 0)
1667 status = nfs4_server_capabilities(server, fhandle);
1668 if (status == 0)
1669 status = nfs4_do_fsinfo(server, fhandle, info);
Trond Myklebustc12e87f2006-03-13 21:20:47 -08001670 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671}
1672
Manoj Naik6b97fd32006-06-09 09:34:29 -04001673/*
1674 * Get locations and (maybe) other attributes of a referral.
1675 * Note that we'll actually follow the referral later when
1676 * we detect fsid mismatch in inode revalidation
1677 */
Trond Myklebust56659e92007-07-17 21:52:39 -04001678static 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 -04001679{
1680 int status = -ENOMEM;
1681 struct page *page = NULL;
1682 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04001683
1684 page = alloc_page(GFP_KERNEL);
1685 if (page == NULL)
1686 goto out;
1687 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1688 if (locations == NULL)
1689 goto out;
1690
Trond Myklebustc228fd32007-01-13 02:28:11 -05001691 status = nfs4_proc_fs_locations(dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001692 if (status != 0)
1693 goto out;
1694 /* Make sure server returned a different fsid for the referral */
1695 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -07001696 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 -04001697 status = -EIO;
1698 goto out;
1699 }
1700
1701 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1702 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1703 if (!fattr->mode)
1704 fattr->mode = S_IFDIR;
1705 memset(fhandle, 0, sizeof(struct nfs_fh));
1706out:
1707 if (page)
1708 __free_page(page);
1709 if (locations)
1710 kfree(locations);
1711 return status;
1712}
1713
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1715{
1716 struct nfs4_getattr_arg args = {
1717 .fh = fhandle,
1718 .bitmask = server->attr_bitmask,
1719 };
1720 struct nfs4_getattr_res res = {
1721 .fattr = fattr,
1722 .server = server,
1723 };
1724 struct rpc_message msg = {
1725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1726 .rpc_argp = &args,
1727 .rpc_resp = &res,
1728 };
1729
Trond Myklebust0e574af2005-10-27 22:12:38 -04001730 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 return rpc_call_sync(server->client, &msg, 0);
1732}
1733
1734static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1735{
1736 struct nfs4_exception exception = { };
1737 int err;
1738 do {
1739 err = nfs4_handle_exception(server,
1740 _nfs4_proc_getattr(server, fhandle, fattr),
1741 &exception);
1742 } while (exception.retry);
1743 return err;
1744}
1745
1746/*
1747 * The file is not closed if it is opened due to the a request to change
1748 * the size of the file. The open call will not be needed once the
1749 * VFS layer lookup-intents are implemented.
1750 *
1751 * Close is called when the inode is destroyed.
1752 * If we haven't opened the file for O_WRONLY, we
1753 * need to in the size_change case to obtain a stateid.
1754 *
1755 * Got race?
1756 * Because OPEN is always done by name in nfsv4, it is
1757 * possible that we opened a different file by the same
1758 * name. We can recognize this race condition, but we
1759 * can't do anything about it besides returning an error.
1760 *
1761 * This will be fixed with VFS changes (lookup-intent).
1762 */
1763static int
1764nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1765 struct iattr *sattr)
1766{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001767 struct inode *inode = dentry->d_inode;
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001768 struct rpc_cred *cred = NULL;
Trond Myklebustd5308382005-11-04 15:33:38 -05001769 struct nfs4_state *state = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 int status;
1771
Trond Myklebust0e574af2005-10-27 22:12:38 -04001772 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773
Trond Myklebustd5308382005-11-04 15:33:38 -05001774 /* Search for an existing open(O_WRITE) file */
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001775 if (sattr->ia_valid & ATTR_FILE) {
1776 struct nfs_open_context *ctx;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001777
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001778 ctx = nfs_file_open_context(sattr->ia_file);
Neil Brown504e5182008-10-16 14:15:16 +11001779 if (ctx) {
1780 cred = ctx->cred;
1781 state = ctx->state;
1782 }
Trond Myklebust659bfcd2008-06-10 19:39:41 -04001783 }
1784
1785 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
Trond Myklebust65e43082005-08-16 11:49:44 -04001786 if (status == 0)
1787 nfs_setattr_update_inode(inode, sattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788 return status;
1789}
1790
Trond Myklebust56659e92007-07-17 21:52:39 -04001791static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1792 const struct qstr *name, struct nfs_fh *fhandle,
David Howells2b3de442006-08-22 20:06:09 -04001793 struct nfs_fattr *fattr)
1794{
1795 int status;
1796 struct nfs4_lookup_arg args = {
1797 .bitmask = server->attr_bitmask,
1798 .dir_fh = dirfh,
1799 .name = name,
1800 };
1801 struct nfs4_lookup_res res = {
1802 .server = server,
1803 .fattr = fattr,
1804 .fh = fhandle,
1805 };
1806 struct rpc_message msg = {
1807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1808 .rpc_argp = &args,
1809 .rpc_resp = &res,
1810 };
1811
1812 nfs_fattr_init(fattr);
1813
1814 dprintk("NFS call lookupfh %s\n", name->name);
1815 status = rpc_call_sync(server->client, &msg, 0);
1816 dprintk("NFS reply lookupfh: %d\n", status);
David Howells2b3de442006-08-22 20:06:09 -04001817 return status;
1818}
1819
1820static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1821 struct qstr *name, struct nfs_fh *fhandle,
1822 struct nfs_fattr *fattr)
1823{
1824 struct nfs4_exception exception = { };
1825 int err;
1826 do {
Trond Myklebust4e56e082007-07-01 18:13:52 -04001827 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1828 /* FIXME: !!!! */
1829 if (err == -NFS4ERR_MOVED) {
1830 err = -EREMOTE;
1831 break;
1832 }
1833 err = nfs4_handle_exception(server, err, &exception);
David Howells2b3de442006-08-22 20:06:09 -04001834 } while (exception.retry);
1835 return err;
1836}
1837
Trond Myklebust56659e92007-07-17 21:52:39 -04001838static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1840{
Trond Myklebust4e56e082007-07-01 18:13:52 -04001841 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842
1843 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust4e56e082007-07-01 18:13:52 -04001844 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001845 if (status == -NFS4ERR_MOVED)
1846 status = nfs4_get_referral(dir, name, fattr, fhandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 dprintk("NFS reply lookup: %d\n", status);
1848 return status;
1849}
1850
1851static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1852{
1853 struct nfs4_exception exception = { };
1854 int err;
1855 do {
1856 err = nfs4_handle_exception(NFS_SERVER(dir),
1857 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1858 &exception);
1859 } while (exception.retry);
1860 return err;
1861}
1862
1863static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1864{
Trond Myklebust76b32992007-08-10 17:45:11 -04001865 struct nfs_server *server = NFS_SERVER(inode);
1866 struct nfs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 struct nfs4_accessargs args = {
1868 .fh = NFS_FH(inode),
Trond Myklebust76b32992007-08-10 17:45:11 -04001869 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 };
Trond Myklebust76b32992007-08-10 17:45:11 -04001871 struct nfs4_accessres res = {
1872 .server = server,
1873 .fattr = &fattr,
1874 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 struct rpc_message msg = {
1876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1877 .rpc_argp = &args,
1878 .rpc_resp = &res,
1879 .rpc_cred = entry->cred,
1880 };
1881 int mode = entry->mask;
1882 int status;
1883
1884 /*
1885 * Determine which access bits we want to ask for...
1886 */
1887 if (mode & MAY_READ)
1888 args.access |= NFS4_ACCESS_READ;
1889 if (S_ISDIR(inode->i_mode)) {
1890 if (mode & MAY_WRITE)
1891 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1892 if (mode & MAY_EXEC)
1893 args.access |= NFS4_ACCESS_LOOKUP;
1894 } else {
1895 if (mode & MAY_WRITE)
1896 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1897 if (mode & MAY_EXEC)
1898 args.access |= NFS4_ACCESS_EXECUTE;
1899 }
Trond Myklebust76b32992007-08-10 17:45:11 -04001900 nfs_fattr_init(&fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1902 if (!status) {
1903 entry->mask = 0;
1904 if (res.access & NFS4_ACCESS_READ)
1905 entry->mask |= MAY_READ;
1906 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1907 entry->mask |= MAY_WRITE;
1908 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1909 entry->mask |= MAY_EXEC;
Trond Myklebust76b32992007-08-10 17:45:11 -04001910 nfs_refresh_inode(inode, &fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 }
1912 return status;
1913}
1914
1915static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1916{
1917 struct nfs4_exception exception = { };
1918 int err;
1919 do {
1920 err = nfs4_handle_exception(NFS_SERVER(inode),
1921 _nfs4_proc_access(inode, entry),
1922 &exception);
1923 } while (exception.retry);
1924 return err;
1925}
1926
1927/*
1928 * TODO: For the time being, we don't try to get any attributes
1929 * along with any of the zero-copy operations READ, READDIR,
1930 * READLINK, WRITE.
1931 *
1932 * In the case of the first three, we want to put the GETATTR
1933 * after the read-type operation -- this is because it is hard
1934 * to predict the length of a GETATTR response in v4, and thus
1935 * align the READ data correctly. This means that the GETATTR
1936 * may end up partially falling into the page cache, and we should
1937 * shift it into the 'tail' of the xdr_buf before processing.
1938 * To do this efficiently, we need to know the total length
1939 * of data received, which doesn't seem to be available outside
1940 * of the RPC layer.
1941 *
1942 * In the case of WRITE, we also want to put the GETATTR after
1943 * the operation -- in this case because we want to make sure
1944 * we get the post-operation mtime and size. This means that
1945 * we can't use xdr_encode_pages() as written: we need a variant
1946 * of it which would leave room in the 'tail' iovec.
1947 *
1948 * Both of these changes to the XDR layer would in fact be quite
1949 * minor, but I decided to leave them for a subsequent patch.
1950 */
1951static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1952 unsigned int pgbase, unsigned int pglen)
1953{
1954 struct nfs4_readlink args = {
1955 .fh = NFS_FH(inode),
1956 .pgbase = pgbase,
1957 .pglen = pglen,
1958 .pages = &page,
1959 };
1960 struct rpc_message msg = {
1961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1962 .rpc_argp = &args,
1963 .rpc_resp = NULL,
1964 };
1965
1966 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1967}
1968
1969static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1970 unsigned int pgbase, unsigned int pglen)
1971{
1972 struct nfs4_exception exception = { };
1973 int err;
1974 do {
1975 err = nfs4_handle_exception(NFS_SERVER(inode),
1976 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1977 &exception);
1978 } while (exception.retry);
1979 return err;
1980}
1981
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982/*
1983 * Got race?
1984 * We will need to arrange for the VFS layer to provide an atomic open.
1985 * Until then, this create/open method is prone to inefficiency and race
1986 * conditions due to the lookup, create, and open VFS calls from sys_open()
1987 * placed on the wire.
1988 *
1989 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1990 * The file will be opened again in the subsequent VFS open call
1991 * (nfs4_proc_file_open).
1992 *
1993 * The open for read will just hang around to be used by any process that
1994 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1995 */
1996
1997static int
1998nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Trond Myklebust02a913a2005-10-18 14:20:17 -07001999 int flags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000{
Trond Myklebustad389da2007-06-05 12:30:00 -04002001 struct path path = {
Jan Blunck4ac91372008-02-14 19:34:32 -08002002 .mnt = nd->path.mnt,
Trond Myklebustad389da2007-06-05 12:30:00 -04002003 .dentry = dentry,
2004 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 struct nfs4_state *state;
2006 struct rpc_cred *cred;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002007 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 int status = 0;
2009
Trond Myklebust98a8e322008-03-12 12:25:28 -04002010 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 if (IS_ERR(cred)) {
2012 status = PTR_ERR(cred);
2013 goto out;
2014 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002015 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
Trond Myklebustd4d9cdc2007-10-02 18:38:53 -04002016 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 if (IS_ERR(state)) {
2018 status = PTR_ERR(state);
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002019 goto out_putcred;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 }
Trond Myklebustd4d9cdc2007-10-02 18:38:53 -04002021 d_add(dentry, igrab(state->inode));
Trond Myklebustd75340c2007-10-01 21:42:01 -04002022 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 if (flags & O_EXCL) {
2024 struct nfs_fattr fattr;
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002025 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07002026 if (status == 0)
Trond Myklebust65e43082005-08-16 11:49:44 -04002027 nfs_setattr_update_inode(state->inode, sattr);
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002028 nfs_post_op_update_inode(state->inode, &fattr);
Trond Myklebust02a913a2005-10-18 14:20:17 -07002029 }
Trond Myklebustad389da2007-06-05 12:30:00 -04002030 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002031 status = nfs4_intent_set_file(nd, &path, state, fmode);
Trond Myklebust02a913a2005-10-18 14:20:17 -07002032 else
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002033 nfs4_close_sync(&path, state, fmode);
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002034out_putcred:
2035 put_rpccred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036out:
2037 return status;
2038}
2039
2040static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2041{
Trond Myklebust16e42952005-10-27 22:12:44 -04002042 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04002043 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044 .fh = NFS_FH(dir),
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04002045 .name.len = name->len,
2046 .name.name = name->name,
Trond Myklebust16e42952005-10-27 22:12:44 -04002047 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04002049 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04002050 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04002051 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04002053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2054 .rpc_argp = &args,
2055 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 };
2057 int status;
2058
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04002059 nfs_fattr_init(&res.dir_attr);
Trond Myklebust16e42952005-10-27 22:12:44 -04002060 status = rpc_call_sync(server->client, &msg, 0);
2061 if (status == 0) {
2062 update_changeattr(dir, &res.cinfo);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04002063 nfs_post_op_update_inode(dir, &res.dir_attr);
Trond Myklebust16e42952005-10-27 22:12:44 -04002064 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 return status;
2066}
2067
2068static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2069{
2070 struct nfs4_exception exception = { };
2071 int err;
2072 do {
2073 err = nfs4_handle_exception(NFS_SERVER(dir),
2074 _nfs4_proc_remove(dir, name),
2075 &exception);
2076 } while (exception.retry);
2077 return err;
2078}
2079
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04002080static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04002082 struct nfs_server *server = NFS_SERVER(dir);
2083 struct nfs_removeargs *args = msg->rpc_argp;
2084 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085
Trond Myklebusta65318b2009-03-11 14:10:28 -04002086 args->bitmask = server->cache_consistency_bitmask;
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04002087 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089}
2090
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04002091static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04002093 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2094
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002095 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04002096 return 0;
2097 update_changeattr(dir, &res->cinfo);
2098 nfs_post_op_update_inode(dir, &res->dir_attr);
2099 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100}
2101
2102static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2103 struct inode *new_dir, struct qstr *new_name)
2104{
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002105 struct nfs_server *server = NFS_SERVER(old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 struct nfs4_rename_arg arg = {
2107 .old_dir = NFS_FH(old_dir),
2108 .new_dir = NFS_FH(new_dir),
2109 .old_name = old_name,
2110 .new_name = new_name,
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002111 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 };
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002113 struct nfs_fattr old_fattr, new_fattr;
2114 struct nfs4_rename_res res = {
2115 .server = server,
2116 .old_fattr = &old_fattr,
2117 .new_fattr = &new_fattr,
2118 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 struct rpc_message msg = {
2120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2121 .rpc_argp = &arg,
2122 .rpc_resp = &res,
2123 };
2124 int status;
2125
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002126 nfs_fattr_init(res.old_fattr);
2127 nfs_fattr_init(res.new_fattr);
2128 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
2130 if (!status) {
2131 update_changeattr(old_dir, &res.old_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002132 nfs_post_op_update_inode(old_dir, res.old_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 update_changeattr(new_dir, &res.new_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04002134 nfs_post_op_update_inode(new_dir, res.new_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 }
2136 return status;
2137}
2138
2139static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2140 struct inode *new_dir, struct qstr *new_name)
2141{
2142 struct nfs4_exception exception = { };
2143 int err;
2144 do {
2145 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2146 _nfs4_proc_rename(old_dir, old_name,
2147 new_dir, new_name),
2148 &exception);
2149 } while (exception.retry);
2150 return err;
2151}
2152
2153static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2154{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002155 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 struct nfs4_link_arg arg = {
2157 .fh = NFS_FH(inode),
2158 .dir_fh = NFS_FH(dir),
2159 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002160 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002162 struct nfs_fattr fattr, dir_attr;
2163 struct nfs4_link_res res = {
2164 .server = server,
2165 .fattr = &fattr,
2166 .dir_attr = &dir_attr,
2167 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 struct rpc_message msg = {
2169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2170 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002171 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 };
2173 int status;
2174
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002175 nfs_fattr_init(res.fattr);
2176 nfs_fattr_init(res.dir_attr);
2177 status = rpc_call_sync(server->client, &msg, 0);
2178 if (!status) {
2179 update_changeattr(dir, &res.cinfo);
2180 nfs_post_op_update_inode(dir, res.dir_attr);
Trond Myklebust73a3d072006-05-25 01:40:47 -04002181 nfs_post_op_update_inode(inode, res.fattr);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04002182 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183
2184 return status;
2185}
2186
2187static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2188{
2189 struct nfs4_exception exception = { };
2190 int err;
2191 do {
2192 err = nfs4_handle_exception(NFS_SERVER(inode),
2193 _nfs4_proc_link(inode, dir, name),
2194 &exception);
2195 } while (exception.retry);
2196 return err;
2197}
2198
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002199struct nfs4_createdata {
2200 struct rpc_message msg;
2201 struct nfs4_create_arg arg;
2202 struct nfs4_create_res res;
2203 struct nfs_fh fh;
2204 struct nfs_fattr fattr;
2205 struct nfs_fattr dir_fattr;
2206};
2207
2208static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2209 struct qstr *name, struct iattr *sattr, u32 ftype)
2210{
2211 struct nfs4_createdata *data;
2212
2213 data = kzalloc(sizeof(*data), GFP_KERNEL);
2214 if (data != NULL) {
2215 struct nfs_server *server = NFS_SERVER(dir);
2216
2217 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2218 data->msg.rpc_argp = &data->arg;
2219 data->msg.rpc_resp = &data->res;
2220 data->arg.dir_fh = NFS_FH(dir);
2221 data->arg.server = server;
2222 data->arg.name = name;
2223 data->arg.attrs = sattr;
2224 data->arg.ftype = ftype;
2225 data->arg.bitmask = server->attr_bitmask;
2226 data->res.server = server;
2227 data->res.fh = &data->fh;
2228 data->res.fattr = &data->fattr;
2229 data->res.dir_fattr = &data->dir_fattr;
2230 nfs_fattr_init(data->res.fattr);
2231 nfs_fattr_init(data->res.dir_fattr);
2232 }
2233 return data;
2234}
2235
2236static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2237{
2238 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2239 if (status == 0) {
2240 update_changeattr(dir, &data->res.dir_cinfo);
2241 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2242 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2243 }
2244 return status;
2245}
2246
2247static void nfs4_free_createdata(struct nfs4_createdata *data)
2248{
2249 kfree(data);
2250}
2251
Chuck Lever4f390c12006-08-22 20:06:22 -04002252static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002253 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002255 struct nfs4_createdata *data;
2256 int status = -ENAMETOOLONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257
Chuck Lever94a6d752006-08-22 20:06:23 -04002258 if (len > NFS4_MAXPATHLEN)
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002259 goto out;
Chuck Lever4f390c12006-08-22 20:06:22 -04002260
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002261 status = -ENOMEM;
2262 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2263 if (data == NULL)
2264 goto out;
2265
2266 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2267 data->arg.u.symlink.pages = &page;
2268 data->arg.u.symlink.len = len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002270 status = nfs4_do_create(dir, dentry, data);
2271
2272 nfs4_free_createdata(data);
2273out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 return status;
2275}
2276
Chuck Lever4f390c12006-08-22 20:06:22 -04002277static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002278 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279{
2280 struct nfs4_exception exception = { };
2281 int err;
2282 do {
2283 err = nfs4_handle_exception(NFS_SERVER(dir),
Chuck Lever94a6d752006-08-22 20:06:23 -04002284 _nfs4_proc_symlink(dir, dentry, page,
2285 len, sattr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286 &exception);
2287 } while (exception.retry);
2288 return err;
2289}
2290
2291static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2292 struct iattr *sattr)
2293{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002294 struct nfs4_createdata *data;
2295 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002297 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2298 if (data == NULL)
2299 goto out;
2300
2301 status = nfs4_do_create(dir, dentry, data);
2302
2303 nfs4_free_createdata(data);
2304out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305 return status;
2306}
2307
2308static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2309 struct iattr *sattr)
2310{
2311 struct nfs4_exception exception = { };
2312 int err;
2313 do {
2314 err = nfs4_handle_exception(NFS_SERVER(dir),
2315 _nfs4_proc_mkdir(dir, dentry, sattr),
2316 &exception);
2317 } while (exception.retry);
2318 return err;
2319}
2320
2321static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2322 u64 cookie, struct page *page, unsigned int count, int plus)
2323{
2324 struct inode *dir = dentry->d_inode;
2325 struct nfs4_readdir_arg args = {
2326 .fh = NFS_FH(dir),
2327 .pages = &page,
2328 .pgbase = 0,
2329 .count = count,
Trond Myklebusta65318b2009-03-11 14:10:28 -04002330 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 };
2332 struct nfs4_readdir_res res;
2333 struct rpc_message msg = {
2334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2335 .rpc_argp = &args,
2336 .rpc_resp = &res,
2337 .rpc_cred = cred,
2338 };
2339 int status;
2340
Harvey Harrison3110ff82008-05-02 13:42:44 -07002341 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
Trond Myklebusteadf4592005-06-22 17:16:39 +00002342 dentry->d_parent->d_name.name,
2343 dentry->d_name.name,
2344 (unsigned long long)cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2346 res.pgbase = args.pgbase;
2347 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2348 if (status == 0)
2349 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustc4812992007-09-28 17:11:45 -04002350
2351 nfs_invalidate_atime(dir);
2352
Harvey Harrison3110ff82008-05-02 13:42:44 -07002353 dprintk("%s: returns %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 return status;
2355}
2356
2357static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2358 u64 cookie, struct page *page, unsigned int count, int plus)
2359{
2360 struct nfs4_exception exception = { };
2361 int err;
2362 do {
2363 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2364 _nfs4_proc_readdir(dentry, cred, cookie,
2365 page, count, plus),
2366 &exception);
2367 } while (exception.retry);
2368 return err;
2369}
2370
2371static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2372 struct iattr *sattr, dev_t rdev)
2373{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002374 struct nfs4_createdata *data;
2375 int mode = sattr->ia_mode;
2376 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377
2378 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2379 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002380
2381 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2382 if (data == NULL)
2383 goto out;
2384
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 if (S_ISFIFO(mode))
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002386 data->arg.ftype = NF4FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 else if (S_ISBLK(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002388 data->arg.ftype = NF4BLK;
2389 data->arg.u.device.specdata1 = MAJOR(rdev);
2390 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 }
2392 else if (S_ISCHR(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002393 data->arg.ftype = NF4CHR;
2394 data->arg.u.device.specdata1 = MAJOR(rdev);
2395 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397
Trond Myklebust57dc9a52008-06-20 15:35:32 -04002398 status = nfs4_do_create(dir, dentry, data);
2399
2400 nfs4_free_createdata(data);
2401out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402 return status;
2403}
2404
2405static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2406 struct iattr *sattr, dev_t rdev)
2407{
2408 struct nfs4_exception exception = { };
2409 int err;
2410 do {
2411 err = nfs4_handle_exception(NFS_SERVER(dir),
2412 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2413 &exception);
2414 } while (exception.retry);
2415 return err;
2416}
2417
2418static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2419 struct nfs_fsstat *fsstat)
2420{
2421 struct nfs4_statfs_arg args = {
2422 .fh = fhandle,
2423 .bitmask = server->attr_bitmask,
2424 };
2425 struct rpc_message msg = {
2426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2427 .rpc_argp = &args,
2428 .rpc_resp = fsstat,
2429 };
2430
Trond Myklebust0e574af2005-10-27 22:12:38 -04002431 nfs_fattr_init(fsstat->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 return rpc_call_sync(server->client, &msg, 0);
2433}
2434
2435static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2436{
2437 struct nfs4_exception exception = { };
2438 int err;
2439 do {
2440 err = nfs4_handle_exception(server,
2441 _nfs4_proc_statfs(server, fhandle, fsstat),
2442 &exception);
2443 } while (exception.retry);
2444 return err;
2445}
2446
2447static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2448 struct nfs_fsinfo *fsinfo)
2449{
2450 struct nfs4_fsinfo_arg args = {
2451 .fh = fhandle,
2452 .bitmask = server->attr_bitmask,
2453 };
2454 struct rpc_message msg = {
2455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2456 .rpc_argp = &args,
2457 .rpc_resp = fsinfo,
2458 };
2459
2460 return rpc_call_sync(server->client, &msg, 0);
2461}
2462
2463static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2464{
2465 struct nfs4_exception exception = { };
2466 int err;
2467
2468 do {
2469 err = nfs4_handle_exception(server,
2470 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2471 &exception);
2472 } while (exception.retry);
2473 return err;
2474}
2475
2476static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2477{
Trond Myklebust0e574af2005-10-27 22:12:38 -04002478 nfs_fattr_init(fsinfo->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2480}
2481
2482static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2483 struct nfs_pathconf *pathconf)
2484{
2485 struct nfs4_pathconf_arg args = {
2486 .fh = fhandle,
2487 .bitmask = server->attr_bitmask,
2488 };
2489 struct rpc_message msg = {
2490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2491 .rpc_argp = &args,
2492 .rpc_resp = pathconf,
2493 };
2494
2495 /* None of the pathconf attributes are mandatory to implement */
2496 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2497 memset(pathconf, 0, sizeof(*pathconf));
2498 return 0;
2499 }
2500
Trond Myklebust0e574af2005-10-27 22:12:38 -04002501 nfs_fattr_init(pathconf->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502 return rpc_call_sync(server->client, &msg, 0);
2503}
2504
2505static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2506 struct nfs_pathconf *pathconf)
2507{
2508 struct nfs4_exception exception = { };
2509 int err;
2510
2511 do {
2512 err = nfs4_handle_exception(server,
2513 _nfs4_proc_pathconf(server, fhandle, pathconf),
2514 &exception);
2515 } while (exception.retry);
2516 return err;
2517}
2518
Trond Myklebustec06c092006-03-20 13:44:27 -05002519static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520{
Trond Myklebustec06c092006-03-20 13:44:27 -05002521 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002523 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524 rpc_restart_call(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05002525 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 }
Trond Myklebust8850df92007-09-28 17:20:07 -04002527
2528 nfs_invalidate_atime(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 if (task->tk_status > 0)
Trond Myklebustec06c092006-03-20 13:44:27 -05002530 renew_lease(server, data->timestamp);
2531 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532}
2533
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002534static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002535{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536 data->timestamp = jiffies;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002537 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538}
2539
Trond Myklebust788e7a82006-03-20 13:44:27 -05002540static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542 struct inode *inode = data->inode;
2543
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002544 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002546 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002548 if (task->tk_status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549 renew_lease(NFS_SERVER(inode), data->timestamp);
Trond Myklebust70ca8852007-09-30 15:21:24 -04002550 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002551 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05002552 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553}
2554
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002555static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556{
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002557 struct nfs_server *server = NFS_SERVER(data->inode);
2558
Trond Myklebusta65318b2009-03-11 14:10:28 -04002559 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002560 data->res.server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561 data->timestamp = jiffies;
2562
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002563 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564}
2565
Trond Myklebust788e7a82006-03-20 13:44:27 -05002566static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568 struct inode *inode = data->inode;
2569
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002570 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002572 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573 }
Trond Myklebust9e08a3c2007-10-08 14:10:31 -04002574 nfs_refresh_inode(inode, data->res.fattr);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002575 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576}
2577
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002578static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579{
Trond Myklebust788e7a82006-03-20 13:44:27 -05002580 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581
Trond Myklebusta65318b2009-03-11 14:10:28 -04002582 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002583 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04002584 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002585}
2586
2587/*
2588 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2589 * standalone procedure for queueing an asynchronous RENEW.
2590 */
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002591static void nfs4_renew_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592{
David Howellsadfa6f92006-08-22 20:06:08 -04002593 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002594 unsigned long timestamp = (unsigned long)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595
2596 if (task->tk_status < 0) {
Trond Myklebust95baa252009-05-26 14:51:00 -04002597 /* Unless we're shutting down, schedule state recovery! */
2598 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2599 nfs4_schedule_state_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 return;
2601 }
2602 spin_lock(&clp->cl_lock);
2603 if (time_before(clp->cl_last_renewal,timestamp))
2604 clp->cl_last_renewal = timestamp;
2605 spin_unlock(&clp->cl_lock);
2606}
2607
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002608static const struct rpc_call_ops nfs4_renew_ops = {
2609 .rpc_call_done = nfs4_renew_done,
2610};
2611
David Howellsadfa6f92006-08-22 20:06:08 -04002612int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002613{
2614 struct rpc_message msg = {
2615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2616 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002617 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618 };
2619
2620 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002621 &nfs4_renew_ops, (void *)jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622}
2623
David Howellsadfa6f92006-08-22 20:06:08 -04002624int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625{
2626 struct rpc_message msg = {
2627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2628 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002629 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630 };
2631 unsigned long now = jiffies;
2632 int status;
2633
2634 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2635 if (status < 0)
2636 return status;
2637 spin_lock(&clp->cl_lock);
2638 if (time_before(clp->cl_last_renewal,now))
2639 clp->cl_last_renewal = now;
2640 spin_unlock(&clp->cl_lock);
2641 return 0;
2642}
2643
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002644static inline int nfs4_server_supports_acls(struct nfs_server *server)
2645{
2646 return (server->caps & NFS_CAP_ACLS)
2647 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2648 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2649}
2650
2651/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2652 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2653 * the stack.
2654 */
2655#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2656
2657static void buf_to_pages(const void *buf, size_t buflen,
2658 struct page **pages, unsigned int *pgbase)
2659{
2660 const void *p = buf;
2661
2662 *pgbase = offset_in_page(buf);
2663 p -= *pgbase;
2664 while (p < buf + buflen) {
2665 *(pages++) = virt_to_page(p);
2666 p += PAGE_CACHE_SIZE;
2667 }
2668}
2669
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002670struct nfs4_cached_acl {
2671 int cached;
2672 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00002673 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002674};
2675
2676static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002677{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002678 struct nfs_inode *nfsi = NFS_I(inode);
2679
2680 spin_lock(&inode->i_lock);
2681 kfree(nfsi->nfs4_acl);
2682 nfsi->nfs4_acl = acl;
2683 spin_unlock(&inode->i_lock);
2684}
2685
2686static void nfs4_zap_acl_attr(struct inode *inode)
2687{
2688 nfs4_set_cached_acl(inode, NULL);
2689}
2690
2691static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2692{
2693 struct nfs_inode *nfsi = NFS_I(inode);
2694 struct nfs4_cached_acl *acl;
2695 int ret = -ENOENT;
2696
2697 spin_lock(&inode->i_lock);
2698 acl = nfsi->nfs4_acl;
2699 if (acl == NULL)
2700 goto out;
2701 if (buf == NULL) /* user is just asking for length */
2702 goto out_len;
2703 if (acl->cached == 0)
2704 goto out;
2705 ret = -ERANGE; /* see getxattr(2) man page */
2706 if (acl->len > buflen)
2707 goto out;
2708 memcpy(buf, acl->data, acl->len);
2709out_len:
2710 ret = acl->len;
2711out:
2712 spin_unlock(&inode->i_lock);
2713 return ret;
2714}
2715
2716static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2717{
2718 struct nfs4_cached_acl *acl;
2719
2720 if (buf && acl_len <= PAGE_SIZE) {
2721 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2722 if (acl == NULL)
2723 goto out;
2724 acl->cached = 1;
2725 memcpy(acl->data, buf, acl_len);
2726 } else {
2727 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2728 if (acl == NULL)
2729 goto out;
2730 acl->cached = 0;
2731 }
2732 acl->len = acl_len;
2733out:
2734 nfs4_set_cached_acl(inode, acl);
2735}
2736
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002737static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002738{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002739 struct page *pages[NFS4ACL_MAXPAGES];
2740 struct nfs_getaclargs args = {
2741 .fh = NFS_FH(inode),
2742 .acl_pages = pages,
2743 .acl_len = buflen,
2744 };
2745 size_t resp_len = buflen;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002746 void *resp_buf;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002747 struct rpc_message msg = {
2748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2749 .rpc_argp = &args,
2750 .rpc_resp = &resp_len,
2751 };
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002752 struct page *localpage = NULL;
2753 int ret;
2754
2755 if (buflen < PAGE_SIZE) {
2756 /* As long as we're doing a round trip to the server anyway,
2757 * let's be prepared for a page of acl data. */
2758 localpage = alloc_page(GFP_KERNEL);
2759 resp_buf = page_address(localpage);
2760 if (localpage == NULL)
2761 return -ENOMEM;
2762 args.acl_pages[0] = localpage;
2763 args.acl_pgbase = 0;
J. Bruce Fields1d95db82005-10-13 16:54:32 -04002764 resp_len = args.acl_len = PAGE_SIZE;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002765 } else {
2766 resp_buf = buf;
2767 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2768 }
2769 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2770 if (ret)
2771 goto out_free;
2772 if (resp_len > args.acl_len)
2773 nfs4_write_cached_acl(inode, NULL, resp_len);
2774 else
2775 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2776 if (buf) {
2777 ret = -ERANGE;
2778 if (resp_len > buflen)
2779 goto out_free;
2780 if (localpage)
2781 memcpy(buf, resp_buf, resp_len);
2782 }
2783 ret = resp_len;
2784out_free:
2785 if (localpage)
2786 __free_page(localpage);
2787 return ret;
2788}
2789
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002790static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2791{
2792 struct nfs4_exception exception = { };
2793 ssize_t ret;
2794 do {
2795 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2796 if (ret >= 0)
2797 break;
2798 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2799 } while (exception.retry);
2800 return ret;
2801}
2802
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002803static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2804{
2805 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002806 int ret;
2807
2808 if (!nfs4_server_supports_acls(server))
2809 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002810 ret = nfs_revalidate_inode(server, inode);
2811 if (ret < 0)
2812 return ret;
Trond Myklebustf41f7412008-06-11 17:39:04 -04002813 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2814 nfs_zap_acl_cache(inode);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002815 ret = nfs4_read_cached_acl(inode, buf, buflen);
2816 if (ret != -ENOENT)
2817 return ret;
2818 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002819}
2820
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002821static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002822{
2823 struct nfs_server *server = NFS_SERVER(inode);
2824 struct page *pages[NFS4ACL_MAXPAGES];
2825 struct nfs_setaclargs arg = {
2826 .fh = NFS_FH(inode),
2827 .acl_pages = pages,
2828 .acl_len = buflen,
2829 };
2830 struct rpc_message msg = {
2831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2832 .rpc_argp = &arg,
2833 .rpc_resp = NULL,
2834 };
2835 int ret;
2836
2837 if (!nfs4_server_supports_acls(server))
2838 return -EOPNOTSUPP;
Trond Myklebust642ac542005-10-18 14:20:19 -07002839 nfs_inode_return_delegation(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002840 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
David Howells1f163412006-08-22 20:06:11 -04002841 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
Trond Myklebustf41f7412008-06-11 17:39:04 -04002842 nfs_access_zap_cache(inode);
2843 nfs_zap_acl_cache(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002844 return ret;
2845}
2846
Trond Myklebust16b4289c2006-08-24 12:27:15 -04002847static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2848{
2849 struct nfs4_exception exception = { };
2850 int err;
2851 do {
2852 err = nfs4_handle_exception(NFS_SERVER(inode),
2853 __nfs4_proc_set_acl(inode, buf, buflen),
2854 &exception);
2855 } while (exception.retry);
2856 return err;
2857}
2858
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859static int
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002860nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861{
David Howells7539bba2006-08-22 20:06:09 -04002862 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863
2864 if (!clp || task->tk_status >= 0)
2865 return 0;
2866 switch(task->tk_status) {
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002867 case -NFS4ERR_ADMIN_REVOKED:
2868 case -NFS4ERR_BAD_STATEID:
2869 case -NFS4ERR_OPENMODE:
2870 if (state == NULL)
2871 break;
2872 nfs4_state_mark_reclaim_nograce(clp, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002873 case -NFS4ERR_STALE_CLIENTID:
2874 case -NFS4ERR_STALE_STATEID:
2875 case -NFS4ERR_EXPIRED:
Trond Myklebust5d008372008-02-22 16:34:17 -05002876 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877 nfs4_schedule_state_recovery(clp);
Trond Myklebuste005e802008-12-23 15:21:48 -05002878 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
Trond Myklebustfda13932008-02-22 16:34:12 -05002879 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002880 task->tk_status = 0;
2881 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 case -NFS4ERR_DELAY:
Trond Myklebust2e96d282008-06-11 16:42:05 -04002883 nfs_inc_server_stats(server, NFSIOS_DELAY);
Chuck Lever006ea732006-03-20 13:44:14 -05002884 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2886 task->tk_status = 0;
2887 return -EAGAIN;
2888 case -NFS4ERR_OLD_STATEID:
2889 task->tk_status = 0;
2890 return -EAGAIN;
2891 }
2892 task->tk_status = nfs4_map_errors(task->tk_status);
2893 return 0;
2894}
2895
David Howellsadfa6f92006-08-22 20:06:08 -04002896int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002897{
2898 nfs4_verifier sc_verifier;
2899 struct nfs4_setclientid setclientid = {
2900 .sc_verifier = &sc_verifier,
2901 .sc_prog = program,
2902 };
2903 struct rpc_message msg = {
2904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2905 .rpc_argp = &setclientid,
2906 .rpc_resp = clp,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002907 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002908 };
Al Virobc4785c2006-10-19 23:28:51 -07002909 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 int loop = 0;
2911 int status;
2912
Al Virobc4785c2006-10-19 23:28:51 -07002913 p = (__be32*)sc_verifier.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002914 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2915 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2916
2917 for(;;) {
2918 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
Trond Myklebust69dd7162007-12-14 14:56:07 -05002919 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
Chuck Leverd4d3c502007-12-10 14:57:09 -05002920 clp->cl_ipaddr,
2921 rpc_peeraddr2str(clp->cl_rpcclient,
2922 RPC_DISPLAY_ADDR),
Trond Myklebust69dd7162007-12-14 14:56:07 -05002923 rpc_peeraddr2str(clp->cl_rpcclient,
2924 RPC_DISPLAY_PROTO),
Trond Myklebust78ea3232008-04-07 20:49:28 -04002925 clp->cl_rpcclient->cl_auth->au_ops->au_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002926 clp->cl_id_uniquifier);
2927 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
Chuck Leverd4d3c502007-12-10 14:57:09 -05002928 sizeof(setclientid.sc_netid),
2929 rpc_peeraddr2str(clp->cl_rpcclient,
2930 RPC_DISPLAY_NETID));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05002932 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933 clp->cl_ipaddr, port >> 8, port & 255);
2934
2935 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2936 if (status != -NFS4ERR_CLID_INUSE)
2937 break;
2938 if (signalled())
2939 break;
2940 if (loop++ & 1)
2941 ssleep(clp->cl_lease_time + 1);
2942 else
2943 if (++clp->cl_id_uniquifier == 0)
2944 break;
2945 }
2946 return status;
2947}
2948
David Howellsadfa6f92006-08-22 20:06:08 -04002949static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950{
2951 struct nfs_fsinfo fsinfo;
2952 struct rpc_message msg = {
2953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2954 .rpc_argp = clp,
2955 .rpc_resp = &fsinfo,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002956 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002957 };
2958 unsigned long now;
2959 int status;
2960
2961 now = jiffies;
2962 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2963 if (status == 0) {
2964 spin_lock(&clp->cl_lock);
2965 clp->cl_lease_time = fsinfo.lease_time * HZ;
2966 clp->cl_last_renewal = now;
2967 spin_unlock(&clp->cl_lock);
2968 }
2969 return status;
2970}
2971
David Howellsadfa6f92006-08-22 20:06:08 -04002972int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Trond Myklebust51581f32006-03-20 13:44:47 -05002973{
Benny Halevy77e03672008-06-24 20:25:57 +03002974 long timeout = 0;
Trond Myklebust51581f32006-03-20 13:44:47 -05002975 int err;
2976 do {
2977 err = _nfs4_proc_setclientid_confirm(clp, cred);
2978 switch (err) {
2979 case 0:
2980 return err;
2981 case -NFS4ERR_RESOURCE:
2982 /* The IBM lawyers misread another document! */
2983 case -NFS4ERR_DELAY:
2984 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2985 }
2986 } while (err == 0);
2987 return err;
2988}
2989
Trond Myklebustfe650402006-01-03 09:55:18 +01002990struct nfs4_delegreturndata {
2991 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002992 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01002993 struct nfs_fh fh;
2994 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002995 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002996 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01002997 int rpc_status;
2998};
2999
Trond Myklebustfe650402006-01-03 09:55:18 +01003000static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3001{
3002 struct nfs4_delegreturndata *data = calldata;
3003 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003004 if (data->rpc_status == 0)
Trond Myklebustfa178f22006-01-03 09:55:38 +01003005 renew_lease(data->res.server, data->timestamp);
Trond Myklebustfe650402006-01-03 09:55:18 +01003006}
3007
3008static void nfs4_delegreturn_release(void *calldata)
3009{
Trond Myklebustfe650402006-01-03 09:55:18 +01003010 kfree(calldata);
3011}
3012
Jesper Juhlc8d149f2006-03-20 13:44:07 -05003013static const struct rpc_call_ops nfs4_delegreturn_ops = {
Trond Myklebustfe650402006-01-03 09:55:18 +01003014 .rpc_call_done = nfs4_delegreturn_done,
3015 .rpc_release = nfs4_delegreturn_release,
3016};
3017
Trond Myklebuste6f81072008-01-24 18:14:34 -05003018static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01003019{
3020 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01003021 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01003022 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003023 struct rpc_message msg = {
3024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3025 .rpc_cred = cred,
3026 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003027 struct rpc_task_setup task_setup_data = {
3028 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04003029 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003030 .callback_ops = &nfs4_delegreturn_ops,
3031 .flags = RPC_TASK_ASYNC,
3032 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05003033 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01003034
3035 data = kmalloc(sizeof(*data), GFP_KERNEL);
3036 if (data == NULL)
3037 return -ENOMEM;
3038 data->args.fhandle = &data->fh;
3039 data->args.stateid = &data->stateid;
Trond Myklebustfa178f22006-01-03 09:55:38 +01003040 data->args.bitmask = server->attr_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01003041 nfs_copy_fh(&data->fh, NFS_FH(inode));
3042 memcpy(&data->stateid, stateid, sizeof(data->stateid));
Trond Myklebustfa178f22006-01-03 09:55:38 +01003043 data->res.fattr = &data->fattr;
3044 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003045 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01003046 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01003047 data->rpc_status = 0;
3048
Trond Myklebustc970aa82007-07-14 15:39:59 -04003049 task_setup_data.callback_data = data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003050 msg.rpc_argp = &data->args,
3051 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003052 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003053 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01003054 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05003055 if (!issync)
3056 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01003057 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05003058 if (status != 0)
3059 goto out;
3060 status = data->rpc_status;
3061 if (status != 0)
3062 goto out;
3063 nfs_refresh_inode(inode, &data->fattr);
3064out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003065 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01003066 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003067}
3068
Trond Myklebuste6f81072008-01-24 18:14:34 -05003069int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003070{
3071 struct nfs_server *server = NFS_SERVER(inode);
3072 struct nfs4_exception exception = { };
3073 int err;
3074 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05003075 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003076 switch (err) {
3077 case -NFS4ERR_STALE_STATEID:
3078 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079 case 0:
3080 return 0;
3081 }
3082 err = nfs4_handle_exception(server, err, &exception);
3083 } while (exception.retry);
3084 return err;
3085}
3086
3087#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3088#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3089
3090/*
3091 * sleep, with exponential backoff, and retry the LOCK operation.
3092 */
3093static unsigned long
3094nfs4_set_lock_task_retry(unsigned long timeout)
3095{
Matthew Wilcox150030b2007-12-06 16:24:39 -05003096 schedule_timeout_killable(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003097 timeout <<= 1;
3098 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3099 return NFS4_LOCK_MAXTIMEOUT;
3100 return timeout;
3101}
3102
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3104{
3105 struct inode *inode = state->inode;
3106 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04003107 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003108 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003110 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003111 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003112 struct nfs_lockt_res res = {
3113 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003114 };
3115 struct rpc_message msg = {
3116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3117 .rpc_argp = &arg,
3118 .rpc_resp = &res,
3119 .rpc_cred = state->owner->so_cred,
3120 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121 struct nfs4_lock_state *lsp;
3122 int status;
3123
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003124 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003125 status = nfs4_set_lock_state(state, request);
3126 if (status != 0)
3127 goto out;
3128 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04003129 arg.lock_owner.id = lsp->ls_id.id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003131 switch (status) {
3132 case 0:
3133 request->fl_type = F_UNLCK;
3134 break;
3135 case -NFS4ERR_DENIED:
3136 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003137 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05003138 request->fl_ops->fl_release_private(request);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003139out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003140 return status;
3141}
3142
3143static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3144{
3145 struct nfs4_exception exception = { };
3146 int err;
3147
3148 do {
3149 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3150 _nfs4_proc_getlk(state, cmd, request),
3151 &exception);
3152 } while (exception.retry);
3153 return err;
3154}
3155
3156static int do_vfs_lock(struct file *file, struct file_lock *fl)
3157{
3158 int res = 0;
3159 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3160 case FL_POSIX:
3161 res = posix_lock_file_wait(file, fl);
3162 break;
3163 case FL_FLOCK:
3164 res = flock_lock_file_wait(file, fl);
3165 break;
3166 default:
3167 BUG();
3168 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003169 return res;
3170}
3171
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003172struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003173 struct nfs_locku_args arg;
3174 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003175 struct nfs4_lock_state *lsp;
3176 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003177 struct file_lock fl;
3178 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003179 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003180};
3181
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003182static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3183 struct nfs_open_context *ctx,
3184 struct nfs4_lock_state *lsp,
3185 struct nfs_seqid *seqid)
3186{
3187 struct nfs4_unlockdata *p;
3188 struct inode *inode = lsp->ls_state->inode;
3189
3190 p = kmalloc(sizeof(*p), GFP_KERNEL);
3191 if (p == NULL)
3192 return NULL;
3193 p->arg.fh = NFS_FH(inode);
3194 p->arg.fl = &p->fl;
3195 p->arg.seqid = seqid;
Trond Myklebustc1d51932008-04-07 13:20:54 -04003196 p->res.seqid = seqid;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003197 p->arg.stateid = &lsp->ls_stateid;
3198 p->lsp = lsp;
3199 atomic_inc(&lsp->ls_count);
3200 /* Ensure we don't close file until we're done freeing locks! */
3201 p->ctx = get_nfs_open_context(ctx);
3202 memcpy(&p->fl, fl, sizeof(p->fl));
3203 p->server = NFS_SERVER(inode);
3204 return p;
3205}
3206
Trond Myklebust06f814a2006-01-03 09:55:07 +01003207static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003208{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003209 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003210 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01003211 nfs4_put_lock_state(calldata->lsp);
3212 put_nfs_open_context(calldata->ctx);
3213 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003214}
3215
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003216static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003217{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003218 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003219
Trond Myklebust06f814a2006-01-03 09:55:07 +01003220 if (RPC_ASSASSINATED(task))
3221 return;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003222 switch (task->tk_status) {
3223 case 0:
3224 memcpy(calldata->lsp->ls_stateid.data,
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003225 calldata->res.stateid.data,
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003226 sizeof(calldata->lsp->ls_stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +01003227 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003228 break;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05003229 case -NFS4ERR_BAD_STATEID:
3230 case -NFS4ERR_OLD_STATEID:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003231 case -NFS4ERR_STALE_STATEID:
3232 case -NFS4ERR_EXPIRED:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003233 break;
3234 default:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05003235 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003236 rpc_restart_call(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003237 }
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003238}
3239
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003240static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003241{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003242 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003244 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003245 return;
3246 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003247 /* Note: exit _without_ running nfs4_locku_done */
3248 task->tk_action = NULL;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003249 return;
3250 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003251 calldata->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003252 rpc_call_start(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003253}
3254
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003255static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003256 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003257 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01003258 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003259};
3260
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003261static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3262 struct nfs_open_context *ctx,
3263 struct nfs4_lock_state *lsp,
3264 struct nfs_seqid *seqid)
3265{
3266 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003267 struct rpc_message msg = {
3268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3269 .rpc_cred = ctx->cred,
3270 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003271 struct rpc_task_setup task_setup_data = {
3272 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04003273 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003274 .callback_ops = &nfs4_locku_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05003275 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003276 .flags = RPC_TASK_ASYNC,
3277 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003278
Frank Filz137d6ac2007-07-09 15:32:29 -07003279 /* Ensure this is an unlock - when canceling a lock, the
3280 * canceled lock is passed in, and it won't be an unlock.
3281 */
3282 fl->fl_type = F_UNLCK;
3283
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003284 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3285 if (data == NULL) {
3286 nfs_free_seqid(seqid);
3287 return ERR_PTR(-ENOMEM);
3288 }
3289
Trond Myklebust5138fde2007-07-14 15:40:01 -04003290 msg.rpc_argp = &data->arg,
3291 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003292 task_setup_data.callback_data = data;
3293 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003294}
3295
Linus Torvalds1da177e2005-04-16 15:20:36 -07003296static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3297{
Trond Myklebust19e03c52008-12-23 15:21:44 -05003298 struct nfs_inode *nfsi = NFS_I(state->inode);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003299 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003300 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01003301 struct rpc_task *task;
3302 int status = 0;
Trond Myklebust536ff0f2008-04-04 15:08:02 -04003303 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003304
Trond Myklebust9b073572006-06-29 16:38:34 -04003305 status = nfs4_set_lock_state(state, request);
3306 /* Unlock _before_ we do the RPC call */
3307 request->fl_flags |= FL_EXISTS;
Trond Myklebust19e03c52008-12-23 15:21:44 -05003308 down_read(&nfsi->rwsem);
3309 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3310 up_read(&nfsi->rwsem);
Trond Myklebust9b073572006-06-29 16:38:34 -04003311 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05003312 }
3313 up_read(&nfsi->rwsem);
Trond Myklebust9b073572006-06-29 16:38:34 -04003314 if (status != 0)
3315 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003316 /* Is this a delegated lock? */
3317 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust9b073572006-06-29 16:38:34 -04003318 goto out;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003319 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003320 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
Trond Myklebust9b073572006-06-29 16:38:34 -04003321 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003322 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04003323 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003324 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003325 status = PTR_ERR(task);
3326 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04003327 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003328 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003329 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04003330out:
Trond Myklebust536ff0f2008-04-04 15:08:02 -04003331 request->fl_flags = fl_flags;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003332 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003333}
3334
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003335struct nfs4_lockdata {
3336 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003337 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003338 struct nfs4_lock_state *lsp;
3339 struct nfs_open_context *ctx;
3340 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003341 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003342 int rpc_status;
3343 int cancelled;
3344};
3345
3346static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3347 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3348{
3349 struct nfs4_lockdata *p;
3350 struct inode *inode = lsp->ls_state->inode;
3351 struct nfs_server *server = NFS_SERVER(inode);
3352
3353 p = kzalloc(sizeof(*p), GFP_KERNEL);
3354 if (p == NULL)
3355 return NULL;
3356
3357 p->arg.fh = NFS_FH(inode);
3358 p->arg.fl = &p->fl;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003359 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3360 if (p->arg.open_seqid == NULL)
3361 goto out_free;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003362 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3363 if (p->arg.lock_seqid == NULL)
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003364 goto out_free_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003365 p->arg.lock_stateid = &lsp->ls_stateid;
David Howells7539bba2006-08-22 20:06:09 -04003366 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04003367 p->arg.lock_owner.id = lsp->ls_id.id;
Trond Myklebustc1d51932008-04-07 13:20:54 -04003368 p->res.lock_seqid = p->arg.lock_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003369 p->lsp = lsp;
3370 atomic_inc(&lsp->ls_count);
3371 p->ctx = get_nfs_open_context(ctx);
3372 memcpy(&p->fl, fl, sizeof(p->fl));
3373 return p;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003374out_free_seqid:
3375 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003376out_free:
3377 kfree(p);
3378 return NULL;
3379}
3380
3381static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3382{
3383 struct nfs4_lockdata *data = calldata;
3384 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003385
Harvey Harrison3110ff82008-05-02 13:42:44 -07003386 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003387 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3388 return;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003389 /* Do we need to do an open_to_lock_owner? */
3390 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
Trond Myklebuste6e21972008-01-02 16:27:16 -05003391 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3392 return;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003393 data->arg.open_stateid = &state->stateid;
3394 data->arg.new_lock_owner = 1;
Trond Myklebustc1d51932008-04-07 13:20:54 -04003395 data->res.open_seqid = data->arg.open_seqid;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003396 } else
3397 data->arg.new_lock_owner = 0;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003398 data->timestamp = jiffies;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003399 rpc_call_start(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003400 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003401}
3402
3403static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3404{
3405 struct nfs4_lockdata *data = calldata;
3406
Harvey Harrison3110ff82008-05-02 13:42:44 -07003407 dprintk("%s: begin!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003408
3409 data->rpc_status = task->tk_status;
3410 if (RPC_ASSASSINATED(task))
3411 goto out;
3412 if (data->arg.new_lock_owner != 0) {
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003413 if (data->rpc_status == 0)
3414 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3415 else
3416 goto out;
3417 }
3418 if (data->rpc_status == 0) {
3419 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3420 sizeof(data->lsp->ls_stateid.data));
3421 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
Trond Myklebust88be9f92007-06-05 10:42:27 -04003422 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003423 }
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003424out:
Harvey Harrison3110ff82008-05-02 13:42:44 -07003425 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003426}
3427
3428static void nfs4_lock_release(void *calldata)
3429{
3430 struct nfs4_lockdata *data = calldata;
3431
Harvey Harrison3110ff82008-05-02 13:42:44 -07003432 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05003433 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003434 if (data->cancelled != 0) {
3435 struct rpc_task *task;
3436 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3437 data->arg.lock_seqid);
3438 if (!IS_ERR(task))
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003439 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003440 dprintk("%s: cancelling lock!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003441 } else
3442 nfs_free_seqid(data->arg.lock_seqid);
3443 nfs4_put_lock_state(data->lsp);
3444 put_nfs_open_context(data->ctx);
3445 kfree(data);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003446 dprintk("%s: done!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003447}
3448
3449static const struct rpc_call_ops nfs4_lock_ops = {
3450 .rpc_call_prepare = nfs4_lock_prepare,
3451 .rpc_call_done = nfs4_lock_done,
3452 .rpc_release = nfs4_lock_release,
3453};
3454
3455static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3456{
3457 struct nfs4_lockdata *data;
3458 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003459 struct rpc_message msg = {
3460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3461 .rpc_cred = state->owner->so_cred,
3462 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04003463 struct rpc_task_setup task_setup_data = {
3464 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04003465 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003466 .callback_ops = &nfs4_lock_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05003467 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003468 .flags = RPC_TASK_ASYNC,
3469 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003470 int ret;
3471
Harvey Harrison3110ff82008-05-02 13:42:44 -07003472 dprintk("%s: begin!\n", __func__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003473 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003474 fl->fl_u.nfs4_fl.owner);
3475 if (data == NULL)
3476 return -ENOMEM;
3477 if (IS_SETLKW(cmd))
3478 data->arg.block = 1;
3479 if (reclaim != 0)
3480 data->arg.reclaim = 1;
Trond Myklebust5138fde2007-07-14 15:40:01 -04003481 msg.rpc_argp = &data->arg,
3482 msg.rpc_resp = &data->res,
Trond Myklebustc970aa82007-07-14 15:39:59 -04003483 task_setup_data.callback_data = data;
3484 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003485 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003486 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003487 ret = nfs4_wait_for_completion_rpc_task(task);
3488 if (ret == 0) {
3489 ret = data->rpc_status;
3490 if (ret == -NFS4ERR_DENIED)
3491 ret = -EAGAIN;
3492 } else
3493 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003494 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003495 dprintk("%s: done, ret = %d!\n", __func__, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003496 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003497}
3498
3499static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3500{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003501 struct nfs_server *server = NFS_SERVER(state->inode);
3502 struct nfs4_exception exception = { };
3503 int err;
3504
3505 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003506 /* Cache the lock if possible... */
3507 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3508 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003509 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3510 if (err != -NFS4ERR_DELAY)
3511 break;
3512 nfs4_handle_exception(server, err, &exception);
3513 } while (exception.retry);
3514 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003515}
3516
3517static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3518{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003519 struct nfs_server *server = NFS_SERVER(state->inode);
3520 struct nfs4_exception exception = { };
3521 int err;
3522
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003523 err = nfs4_set_lock_state(state, request);
3524 if (err != 0)
3525 return err;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003526 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003527 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3528 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003529 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3530 if (err != -NFS4ERR_DELAY)
3531 break;
3532 nfs4_handle_exception(server, err, &exception);
3533 } while (exception.retry);
3534 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003535}
3536
3537static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3538{
Trond Myklebust19e03c52008-12-23 15:21:44 -05003539 struct nfs_inode *nfsi = NFS_I(state->inode);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003540 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003541 int status;
3542
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003543 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003544 status = nfs4_set_lock_state(state, request);
3545 if (status != 0)
3546 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003547 request->fl_flags |= FL_ACCESS;
3548 status = do_vfs_lock(request->fl_file, request);
3549 if (status < 0)
3550 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05003551 down_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003552 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust01c3b862006-06-29 16:38:39 -04003553 /* Yes: cache locks! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04003554 /* ...but avoid races with delegation recall... */
Trond Myklebust19e03c52008-12-23 15:21:44 -05003555 request->fl_flags = fl_flags & ~FL_SLEEP;
3556 status = do_vfs_lock(request->fl_file, request);
3557 goto out_unlock;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003558 }
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003559 status = _nfs4_do_setlk(state, cmd, request, 0);
3560 if (status != 0)
Trond Myklebust01c3b862006-06-29 16:38:39 -04003561 goto out_unlock;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003562 /* Note: we always want to sleep here! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04003563 request->fl_flags = fl_flags | FL_SLEEP;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003564 if (do_vfs_lock(request->fl_file, request) < 0)
Harvey Harrison3110ff82008-05-02 13:42:44 -07003565 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003566out_unlock:
Trond Myklebust19e03c52008-12-23 15:21:44 -05003567 up_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003568out:
3569 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003570 return status;
3571}
3572
3573static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3574{
3575 struct nfs4_exception exception = { };
3576 int err;
3577
3578 do {
3579 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3580 _nfs4_proc_setlk(state, cmd, request),
3581 &exception);
3582 } while (exception.retry);
3583 return err;
3584}
3585
3586static int
3587nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3588{
3589 struct nfs_open_context *ctx;
3590 struct nfs4_state *state;
3591 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3592 int status;
3593
3594 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04003595 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003596 state = ctx->state;
3597
3598 if (request->fl_start < 0 || request->fl_end < 0)
3599 return -EINVAL;
3600
3601 if (IS_GETLK(cmd))
3602 return nfs4_proc_getlk(state, F_GETLK, request);
3603
3604 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3605 return -EINVAL;
3606
3607 if (request->fl_type == F_UNLCK)
3608 return nfs4_proc_unlck(state, cmd, request);
3609
3610 do {
3611 status = nfs4_proc_setlk(state, cmd, request);
3612 if ((status != -EAGAIN) || IS_SETLK(cmd))
3613 break;
3614 timeout = nfs4_set_lock_task_retry(timeout);
3615 status = -ERESTARTSYS;
3616 if (signalled())
3617 break;
3618 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003619 return status;
3620}
3621
Trond Myklebust888e6942005-11-04 15:38:11 -05003622int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3623{
3624 struct nfs_server *server = NFS_SERVER(state->inode);
3625 struct nfs4_exception exception = { };
3626 int err;
3627
3628 err = nfs4_set_lock_state(state, fl);
3629 if (err != 0)
3630 goto out;
3631 do {
3632 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3633 if (err != -NFS4ERR_DELAY)
3634 break;
3635 err = nfs4_handle_exception(server, err, &exception);
3636 } while (exception.retry);
3637out:
3638 return err;
3639}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003640
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003641#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3642
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003643int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3644 size_t buflen, int flags)
3645{
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003646 struct inode *inode = dentry->d_inode;
3647
3648 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3649 return -EOPNOTSUPP;
3650
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003651 return nfs4_proc_set_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003652}
3653
3654/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3655 * and that's what we'll do for e.g. user attributes that haven't been set.
3656 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3657 * attributes in kernel-managed attribute namespaces. */
3658ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3659 size_t buflen)
3660{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003661 struct inode *inode = dentry->d_inode;
3662
3663 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3664 return -EOPNOTSUPP;
3665
3666 return nfs4_proc_get_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003667}
3668
3669ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3670{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003671 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003672
J. Bruce Fields096455a2006-03-20 23:23:42 -05003673 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3674 return 0;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003675 if (buf && buflen < len)
3676 return -ERANGE;
3677 if (buf)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003678 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3679 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003680}
3681
Trond Myklebust69aaaae2009-03-11 14:10:28 -04003682static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3683{
3684 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3685 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3686 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3687 return;
3688
3689 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3690 NFS_ATTR_FATTR_NLINK;
3691 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3692 fattr->nlink = 2;
3693}
3694
Trond Myklebust56659e92007-07-17 21:52:39 -04003695int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003696 struct nfs4_fs_locations *fs_locations, struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04003697{
3698 struct nfs_server *server = NFS_SERVER(dir);
3699 u32 bitmask[2] = {
Manoj Naik361e6242006-06-09 09:34:24 -04003700 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3701 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003702 };
3703 struct nfs4_fs_locations_arg args = {
3704 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05003705 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003706 .page = page,
3707 .bitmask = bitmask,
3708 };
3709 struct rpc_message msg = {
3710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3711 .rpc_argp = &args,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003712 .rpc_resp = fs_locations,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003713 };
3714 int status;
3715
Harvey Harrison3110ff82008-05-02 13:42:44 -07003716 dprintk("%s: start\n", __func__);
Trond Myklebustc228fd32007-01-13 02:28:11 -05003717 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04003718 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04003719 fs_locations->nlocations = 0;
Trond Myklebust683b57b2006-06-09 09:34:22 -04003720 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust69aaaae2009-03-11 14:10:28 -04003721 nfs_fixup_referral_attributes(&fs_locations->fattr);
Harvey Harrison3110ff82008-05-02 13:42:44 -07003722 dprintk("%s: returned status = %d\n", __func__, status);
Trond Myklebust683b57b2006-06-09 09:34:22 -04003723 return status;
3724}
3725
Linus Torvalds1da177e2005-04-16 15:20:36 -07003726struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05003727 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05003728 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003729 .recover_open = nfs4_open_reclaim,
3730 .recover_lock = nfs4_lock_reclaim,
3731};
3732
Trond Myklebustb79a4a12008-12-23 15:21:41 -05003733struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05003734 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05003735 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003736 .recover_open = nfs4_open_expired,
3737 .recover_lock = nfs4_lock_expired,
3738};
3739
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08003740static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003741 .permission = nfs_permission,
3742 .getattr = nfs_getattr,
3743 .setattr = nfs_setattr,
3744 .getxattr = nfs4_getxattr,
3745 .setxattr = nfs4_setxattr,
3746 .listxattr = nfs4_listxattr,
3747};
3748
David Howells509de812006-08-22 20:06:11 -04003749const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003750 .version = 4, /* protocol version */
3751 .dentry_ops = &nfs4_dentry_operations,
3752 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003753 .file_inode_ops = &nfs4_file_inode_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003754 .getroot = nfs4_proc_get_root,
3755 .getattr = nfs4_proc_getattr,
3756 .setattr = nfs4_proc_setattr,
David Howells2b3de442006-08-22 20:06:09 -04003757 .lookupfh = nfs4_proc_lookupfh,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003758 .lookup = nfs4_proc_lookup,
3759 .access = nfs4_proc_access,
3760 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003761 .create = nfs4_proc_create,
3762 .remove = nfs4_proc_remove,
3763 .unlink_setup = nfs4_proc_unlink_setup,
3764 .unlink_done = nfs4_proc_unlink_done,
3765 .rename = nfs4_proc_rename,
3766 .link = nfs4_proc_link,
3767 .symlink = nfs4_proc_symlink,
3768 .mkdir = nfs4_proc_mkdir,
3769 .rmdir = nfs4_proc_remove,
3770 .readdir = nfs4_proc_readdir,
3771 .mknod = nfs4_proc_mknod,
3772 .statfs = nfs4_proc_statfs,
3773 .fsinfo = nfs4_proc_fsinfo,
3774 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04003775 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003776 .decode_dirent = nfs4_decode_dirent,
3777 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05003778 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003779 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003780 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781 .commit_setup = nfs4_proc_commit_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003782 .commit_done = nfs4_commit_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003783 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00003784 .clear_acl_cache = nfs4_zap_acl_attr,
Trond Myklebust7fe5c392009-03-19 15:35:50 -04003785 .close_context = nfs4_close_context,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003786};
3787
3788/*
3789 * Local variables:
3790 * c-basic-offset: 8
3791 * End:
3792 */