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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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> | |
02a913a7 | 50 | #include <linux/mount.h> |
1da177e4 | 51 | |
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 | 53 | #include "delegation.h" |
101070ca | 54 | #include "internal.h" |
006ea73e | 55 | #include "iostat.h" |
1da177e4 LT |
56 | |
57 | #define NFSDBG_FACILITY NFSDBG_PROC | |
58 | ||
2066fe89 | 59 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
60 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
61 | ||
cdd4e68b | 62 | struct nfs4_opendata; |
864472e9 | 63 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 64 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 65 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
66 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
67 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
1da177e4 | 68 | |
1da177e4 | 69 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 70 | static int nfs4_map_errors(int err) |
1da177e4 LT |
71 | { |
72 | if (err < -1000) { | |
73 | dprintk("%s could not handle NFSv4 error %d\n", | |
3110ff80 | 74 | __func__, -err); |
1da177e4 LT |
75 | return -EIO; |
76 | } | |
77 | return err; | |
78 | } | |
79 | ||
80 | /* | |
81 | * This is our standard bitmap for GETATTR requests. | |
82 | */ | |
83 | const 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 | ||
100 | const u32 nfs4_statfs_bitmap[2] = { | |
101 | FATTR4_WORD0_FILES_AVAIL | |
102 | | FATTR4_WORD0_FILES_FREE | |
103 | | FATTR4_WORD0_FILES_TOTAL, | |
104 | FATTR4_WORD1_SPACE_AVAIL | |
105 | | FATTR4_WORD1_SPACE_FREE | |
106 | | FATTR4_WORD1_SPACE_TOTAL | |
107 | }; | |
108 | ||
4ce79717 | 109 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
110 | FATTR4_WORD0_MAXLINK |
111 | | FATTR4_WORD0_MAXNAME, | |
112 | 0 | |
113 | }; | |
114 | ||
115 | const 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 | ||
830b8e33 MN |
122 | const 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 | ||
bc4785cd | 141 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
142 | struct nfs4_readdir_arg *readdir) |
143 | { | |
0dbb4c67 | 144 | __be32 *start, *p; |
1da177e4 LT |
145 | |
146 | BUG_ON(readdir->count < 80); | |
147 | if (cookie > 2) { | |
b7ef1956 | 148 | readdir->cookie = cookie; |
1da177e4 LT |
149 | 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 | */ | |
0dbb4c67 | 165 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
166 | |
167 | if (cookie == 0) { | |
168 | *p++ = xdr_one; /* next */ | |
169 | *p++ = xdr_zero; /* cookie, first word */ | |
170 | *p++ = xdr_one; /* cookie, second word */ | |
171 | *p++ = xdr_one; /* entry len */ | |
172 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
173 | p++; | |
174 | *p++ = xdr_one; /* bitmap length */ | |
175 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
176 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 177 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
178 | } |
179 | ||
180 | *p++ = xdr_one; /* next */ | |
181 | *p++ = xdr_zero; /* cookie, first word */ | |
182 | *p++ = xdr_two; /* cookie, second word */ | |
183 | *p++ = xdr_two; /* entry len */ | |
184 | memcpy(p, "..\0\0", 4); /* entry */ | |
185 | p++; | |
186 | *p++ = xdr_one; /* bitmap length */ | |
187 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
188 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 189 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
190 | |
191 | readdir->pgbase = (char *)p - (char *)start; | |
192 | readdir->count -= readdir->pgbase; | |
193 | kunmap_atomic(start, KM_USER0); | |
194 | } | |
195 | ||
65de872e TM |
196 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
197 | { | |
198 | int res; | |
199 | ||
200 | might_sleep(); | |
201 | ||
e005e804 | 202 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 203 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
204 | return res; |
205 | } | |
206 | ||
207 | static 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 | */ | |
227 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
228 | { | |
229 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 230 | struct nfs4_state *state = exception->state; |
65de872e TM |
231 | int ret = errorcode; |
232 | ||
233 | exception->retry = 0; | |
234 | switch(errorcode) { | |
235 | case 0: | |
236 | return 0; | |
9e33bed5 TM |
237 | 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); | |
65de872e TM |
243 | 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 | ||
26e976a8 | 265 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 266 | { |
7539bbab | 267 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
268 | 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 | ||
cccef3b9 AA |
274 | #if defined(CONFIG_NFS_V4_1) |
275 | ||
276 | int _nfs4_call_sync_session(struct nfs_server *server, | |
277 | struct rpc_message *msg, | |
278 | struct nfs4_sequence_args *args, | |
279 | struct nfs4_sequence_res *res, | |
280 | int cache_reply) | |
281 | { | |
282 | /* in preparation for setting up the sequence op */ | |
283 | return rpc_call_sync(server->client, msg, 0); | |
284 | } | |
285 | ||
286 | #endif /* CONFIG_NFS_V4_1 */ | |
287 | ||
288 | int _nfs4_call_sync(struct nfs_server *server, | |
289 | struct rpc_message *msg, | |
290 | struct nfs4_sequence_args *args, | |
291 | struct nfs4_sequence_res *res, | |
292 | int cache_reply) | |
293 | { | |
f3752975 | 294 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
295 | return rpc_call_sync(server->client, msg, 0); |
296 | } | |
297 | ||
298 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
299 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
300 | &(res)->seq_res, (cache_reply)) | |
301 | ||
38478b24 | 302 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 303 | { |
38478b24 | 304 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 305 | |
38478b24 | 306 | spin_lock(&dir->i_lock); |
40d24704 TM |
307 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
308 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 309 | nfs_force_lookup_revalidate(dir); |
40d24704 | 310 | nfsi->change_attr = cinfo->after; |
38478b24 | 311 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
312 | } |
313 | ||
e56e0b78 | 314 | struct nfs4_opendata { |
c6d00e63 | 315 | struct kref kref; |
e56e0b78 TM |
316 | struct nfs_openargs o_arg; |
317 | struct nfs_openres o_res; | |
cdd4e68b TM |
318 | struct nfs_open_confirmargs c_arg; |
319 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
320 | struct nfs_fattr f_attr; |
321 | struct nfs_fattr dir_attr; | |
ad389da7 | 322 | struct path path; |
e56e0b78 TM |
323 | struct dentry *dir; |
324 | struct nfs4_state_owner *owner; | |
aac00a8d | 325 | struct nfs4_state *state; |
e56e0b78 | 326 | struct iattr attrs; |
26e976a8 | 327 | unsigned long timestamp; |
3e309914 | 328 | unsigned int rpc_done : 1; |
24ac23ab TM |
329 | int rpc_status; |
330 | int cancelled; | |
e56e0b78 TM |
331 | }; |
332 | ||
2ced46c2 TM |
333 | |
334 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
335 | { | |
336 | p->o_res.f_attr = &p->f_attr; | |
337 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
338 | p->o_res.seqid = p->o_arg.seqid; |
339 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
340 | p->o_res.server = p->o_arg.server; |
341 | nfs_fattr_init(&p->f_attr); | |
342 | nfs_fattr_init(&p->dir_attr); | |
343 | } | |
344 | ||
ad389da7 | 345 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 346 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
347 | const struct iattr *attrs) |
348 | { | |
ad389da7 | 349 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
350 | struct inode *dir = parent->d_inode; |
351 | struct nfs_server *server = NFS_SERVER(dir); | |
352 | struct nfs4_opendata *p; | |
353 | ||
354 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
355 | if (p == NULL) | |
356 | goto err; | |
357 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
358 | if (p->o_arg.seqid == NULL) | |
359 | goto err_free; | |
ad389da7 TM |
360 | p->path.mnt = mntget(path->mnt); |
361 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
362 | p->dir = parent; |
363 | p->owner = sp; | |
364 | atomic_inc(&sp->so_count); | |
365 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
366 | p->o_arg.open_flags = flags; |
367 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 368 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 369 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 370 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
371 | p->o_arg.server = server; |
372 | p->o_arg.bitmask = server->attr_bitmask; | |
373 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
e56e0b78 TM |
374 | if (flags & O_EXCL) { |
375 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
376 | s[0] = jiffies; | |
377 | s[1] = current->pid; | |
378 | } else if (flags & O_CREAT) { | |
379 | p->o_arg.u.attrs = &p->attrs; | |
380 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
381 | } | |
cdd4e68b TM |
382 | p->c_arg.fh = &p->o_res.fh; |
383 | p->c_arg.stateid = &p->o_res.stateid; | |
384 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 385 | nfs4_init_opendata_res(p); |
c6d00e63 | 386 | kref_init(&p->kref); |
e56e0b78 TM |
387 | return p; |
388 | err_free: | |
389 | kfree(p); | |
390 | err: | |
391 | dput(parent); | |
392 | return NULL; | |
393 | } | |
394 | ||
c6d00e63 | 395 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 396 | { |
c6d00e63 TM |
397 | struct nfs4_opendata *p = container_of(kref, |
398 | struct nfs4_opendata, kref); | |
399 | ||
400 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
401 | if (p->state != NULL) |
402 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
403 | nfs4_put_state_owner(p->owner); |
404 | dput(p->dir); | |
31f31db1 | 405 | path_put(&p->path); |
c6d00e63 TM |
406 | kfree(p); |
407 | } | |
408 | ||
409 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
410 | { | |
411 | if (p != NULL) | |
412 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
413 | } |
414 | ||
06f814a3 TM |
415 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
416 | { | |
06f814a3 TM |
417 | int ret; |
418 | ||
06f814a3 | 419 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
420 | return ret; |
421 | } | |
422 | ||
dc0b027d | 423 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
424 | { |
425 | int ret = 0; | |
dc0b027d TM |
426 | |
427 | if (open_mode & O_EXCL) | |
428 | goto out; | |
429 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 TM |
430 | case FMODE_READ: |
431 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
432 | break; |
433 | case FMODE_WRITE: | |
434 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
435 | break; |
436 | case FMODE_READ|FMODE_WRITE: | |
437 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
438 | } | |
dc0b027d | 439 | out: |
6ee41268 TM |
440 | return ret; |
441 | } | |
442 | ||
dc0b027d | 443 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 444 | { |
dc0b027d | 445 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 446 | return 0; |
15c831bf | 447 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 448 | return 0; |
b7391f44 | 449 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
450 | return 1; |
451 | } | |
452 | ||
dc0b027d | 453 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 454 | { |
dc0b027d | 455 | switch (fmode) { |
e7616923 TM |
456 | case FMODE_WRITE: |
457 | state->n_wronly++; | |
458 | break; | |
459 | case FMODE_READ: | |
460 | state->n_rdonly++; | |
461 | break; | |
462 | case FMODE_READ|FMODE_WRITE: | |
463 | state->n_rdwr++; | |
464 | } | |
dc0b027d | 465 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
466 | } |
467 | ||
dc0b027d | 468 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
469 | { |
470 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
471 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
472 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 473 | switch (fmode) { |
003707c7 TM |
474 | case FMODE_READ: |
475 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
476 | break; | |
477 | case FMODE_WRITE: | |
478 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
479 | break; | |
480 | case FMODE_READ|FMODE_WRITE: | |
481 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
482 | } | |
e7616923 TM |
483 | } |
484 | ||
dc0b027d | 485 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 486 | { |
8bda4e4c | 487 | write_seqlock(&state->seqlock); |
dc0b027d | 488 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 489 | write_sequnlock(&state->seqlock); |
003707c7 TM |
490 | } |
491 | ||
dc0b027d | 492 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 493 | { |
8bda4e4c TM |
494 | /* |
495 | * Protect the call to nfs4_state_set_mode_locked and | |
496 | * serialise the stateid update | |
497 | */ | |
498 | write_seqlock(&state->seqlock); | |
003707c7 TM |
499 | if (deleg_stateid != NULL) { |
500 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
501 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
502 | } | |
503 | if (open_stateid != NULL) | |
dc0b027d | 504 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
505 | write_sequnlock(&state->seqlock); |
506 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 507 | update_open_stateflags(state, fmode); |
ec073428 | 508 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
509 | } |
510 | ||
dc0b027d | 511 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
512 | { |
513 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
514 | struct nfs_delegation *deleg_cur; | |
515 | int ret = 0; | |
516 | ||
dc0b027d | 517 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
518 | |
519 | rcu_read_lock(); | |
520 | deleg_cur = rcu_dereference(nfsi->delegation); | |
521 | if (deleg_cur == NULL) | |
522 | goto no_delegation; | |
523 | ||
524 | spin_lock(&deleg_cur->lock); | |
525 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 526 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
527 | goto no_delegation_unlock; |
528 | ||
529 | if (delegation == NULL) | |
530 | delegation = &deleg_cur->stateid; | |
531 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
532 | goto no_delegation_unlock; | |
533 | ||
b7391f44 | 534 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 535 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
536 | ret = 1; |
537 | no_delegation_unlock: | |
538 | spin_unlock(&deleg_cur->lock); | |
539 | no_delegation: | |
540 | rcu_read_unlock(); | |
541 | ||
542 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 543 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
544 | ret = 1; |
545 | } | |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
550 | ||
dc0b027d | 551 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
552 | { |
553 | struct nfs_delegation *delegation; | |
554 | ||
555 | rcu_read_lock(); | |
556 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 557 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
558 | rcu_read_unlock(); |
559 | return; | |
560 | } | |
561 | rcu_read_unlock(); | |
562 | nfs_inode_return_delegation(inode); | |
563 | } | |
564 | ||
6ee41268 | 565 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
566 | { |
567 | struct nfs4_state *state = opendata->state; | |
568 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
569 | struct nfs_delegation *delegation; | |
dc0b027d TM |
570 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
571 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
572 | nfs4_stateid stateid; |
573 | int ret = -EAGAIN; | |
574 | ||
aac00a8d | 575 | for (;;) { |
dc0b027d | 576 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 577 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
578 | if (can_open_cached(state, fmode, open_mode)) { |
579 | update_open_stateflags(state, fmode); | |
6ee41268 | 580 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
581 | goto out_return_state; |
582 | } | |
583 | spin_unlock(&state->owner->so_lock); | |
584 | } | |
34310430 TM |
585 | rcu_read_lock(); |
586 | delegation = rcu_dereference(nfsi->delegation); | |
587 | if (delegation == NULL || | |
dc0b027d | 588 | !can_open_delegated(delegation, fmode)) { |
34310430 | 589 | rcu_read_unlock(); |
aac00a8d | 590 | break; |
34310430 | 591 | } |
aac00a8d TM |
592 | /* Save the delegation */ |
593 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
594 | rcu_read_unlock(); | |
af22f94a | 595 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
596 | if (ret != 0) |
597 | goto out; | |
598 | ret = -EAGAIN; | |
34310430 TM |
599 | |
600 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 601 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 602 | goto out_return_state; |
aac00a8d | 603 | } |
aac00a8d TM |
604 | out: |
605 | return ERR_PTR(ret); | |
606 | out_return_state: | |
607 | atomic_inc(&state->count); | |
608 | return state; | |
609 | } | |
610 | ||
24ac23ab TM |
611 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
612 | { | |
613 | struct inode *inode; | |
614 | struct nfs4_state *state = NULL; | |
003707c7 | 615 | struct nfs_delegation *delegation; |
1b370bc2 | 616 | int ret; |
24ac23ab | 617 | |
aac00a8d | 618 | if (!data->rpc_done) { |
6ee41268 | 619 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
620 | goto out; |
621 | } | |
622 | ||
1b370bc2 | 623 | ret = -EAGAIN; |
24ac23ab | 624 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 625 | goto err; |
24ac23ab | 626 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 627 | ret = PTR_ERR(inode); |
03f28e3a | 628 | if (IS_ERR(inode)) |
1b370bc2 TM |
629 | goto err; |
630 | ret = -ENOMEM; | |
24ac23ab TM |
631 | state = nfs4_get_open_state(inode, data->owner); |
632 | if (state == NULL) | |
1b370bc2 | 633 | goto err_put_inode; |
549d6ed5 | 634 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
635 | int delegation_flags = 0; |
636 | ||
003707c7 TM |
637 | rcu_read_lock(); |
638 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
639 | if (delegation) | |
640 | delegation_flags = delegation->flags; | |
641 | rcu_read_unlock(); | |
15c831bf | 642 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
643 | nfs_inode_set_delegation(state->inode, |
644 | data->owner->so_cred, | |
645 | &data->o_res); | |
646 | else | |
647 | nfs_inode_reclaim_delegation(state->inode, | |
648 | data->owner->so_cred, | |
649 | &data->o_res); | |
650 | } | |
34310430 TM |
651 | |
652 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 653 | data->o_arg.fmode); |
24ac23ab | 654 | iput(inode); |
aac00a8d | 655 | out: |
24ac23ab | 656 | return state; |
1b370bc2 TM |
657 | err_put_inode: |
658 | iput(inode); | |
659 | err: | |
660 | return ERR_PTR(ret); | |
24ac23ab TM |
661 | } |
662 | ||
864472e9 TM |
663 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
664 | { | |
665 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
666 | struct nfs_open_context *ctx; | |
667 | ||
668 | spin_lock(&state->inode->i_lock); | |
669 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
670 | if (ctx->state != state) | |
671 | continue; | |
672 | get_nfs_open_context(ctx); | |
673 | spin_unlock(&state->inode->i_lock); | |
674 | return ctx; | |
675 | } | |
676 | spin_unlock(&state->inode->i_lock); | |
677 | return ERR_PTR(-ENOENT); | |
678 | } | |
679 | ||
6f220ed5 TM |
680 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
681 | { | |
682 | struct nfs4_opendata *opendata; | |
683 | ||
dc0b027d | 684 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
685 | if (opendata == NULL) |
686 | return ERR_PTR(-ENOMEM); | |
687 | opendata->state = state; | |
688 | atomic_inc(&state->count); | |
689 | return opendata; | |
690 | } | |
691 | ||
dc0b027d | 692 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 693 | { |
2ced46c2 | 694 | struct nfs4_state *newstate; |
864472e9 TM |
695 | int ret; |
696 | ||
dc0b027d TM |
697 | opendata->o_arg.open_flags = 0; |
698 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
699 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
700 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
701 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
702 | ret = _nfs4_proc_open(opendata); |
703 | if (ret != 0) | |
704 | return ret; | |
2ced46c2 | 705 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
706 | if (IS_ERR(newstate)) |
707 | return PTR_ERR(newstate); | |
dc0b027d | 708 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 709 | *res = newstate; |
864472e9 TM |
710 | return 0; |
711 | } | |
712 | ||
713 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
714 | { | |
864472e9 | 715 | struct nfs4_state *newstate; |
864472e9 TM |
716 | int ret; |
717 | ||
718 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 719 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
720 | smp_rmb(); |
721 | if (state->n_rdwr != 0) { | |
2ced46c2 | 722 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
723 | if (ret != 0) |
724 | return ret; | |
2ced46c2 TM |
725 | if (newstate != state) |
726 | return -ESTALE; | |
864472e9 TM |
727 | } |
728 | if (state->n_wronly != 0) { | |
2ced46c2 | 729 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
730 | if (ret != 0) |
731 | return ret; | |
2ced46c2 TM |
732 | if (newstate != state) |
733 | return -ESTALE; | |
864472e9 TM |
734 | } |
735 | if (state->n_rdonly != 0) { | |
2ced46c2 | 736 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
737 | if (ret != 0) |
738 | return ret; | |
2ced46c2 TM |
739 | if (newstate != state) |
740 | return -ESTALE; | |
864472e9 | 741 | } |
1ac7e2fd TM |
742 | /* |
743 | * We may have performed cached opens for all three recoveries. | |
744 | * Check if we need to update the current stateid. | |
745 | */ | |
746 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
747 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 748 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
749 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
750 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 751 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 752 | } |
864472e9 TM |
753 | return 0; |
754 | } | |
755 | ||
1da177e4 LT |
756 | /* |
757 | * OPEN_RECLAIM: | |
758 | * reclaim state on the server after a reboot. | |
1da177e4 | 759 | */ |
539cd03a | 760 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 761 | { |
1ac7e2fd | 762 | struct nfs_delegation *delegation; |
864472e9 | 763 | struct nfs4_opendata *opendata; |
dc0b027d | 764 | fmode_t delegation_type = 0; |
1da177e4 LT |
765 | int status; |
766 | ||
6f220ed5 TM |
767 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
768 | if (IS_ERR(opendata)) | |
769 | return PTR_ERR(opendata); | |
864472e9 TM |
770 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
771 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
772 | rcu_read_lock(); |
773 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 774 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 775 | delegation_type = delegation->type; |
1ac7e2fd | 776 | rcu_read_unlock(); |
864472e9 TM |
777 | opendata->o_arg.u.delegation_type = delegation_type; |
778 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 779 | nfs4_opendata_put(opendata); |
1da177e4 LT |
780 | return status; |
781 | } | |
782 | ||
539cd03a | 783 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
784 | { |
785 | struct nfs_server *server = NFS_SERVER(state->inode); | |
786 | struct nfs4_exception exception = { }; | |
787 | int err; | |
788 | do { | |
539cd03a | 789 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
790 | if (err != -NFS4ERR_DELAY) |
791 | break; | |
792 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
793 | } while (exception.retry); |
794 | return err; | |
795 | } | |
796 | ||
864472e9 TM |
797 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
798 | { | |
799 | struct nfs_open_context *ctx; | |
800 | int ret; | |
801 | ||
802 | ctx = nfs4_state_find_open_context(state); | |
803 | if (IS_ERR(ctx)) | |
804 | return PTR_ERR(ctx); | |
539cd03a | 805 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
806 | put_nfs_open_context(ctx); |
807 | return ret; | |
808 | } | |
809 | ||
13437e12 | 810 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 811 | { |
e56e0b78 | 812 | struct nfs4_opendata *opendata; |
864472e9 | 813 | int ret; |
1da177e4 | 814 | |
6f220ed5 TM |
815 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
816 | if (IS_ERR(opendata)) | |
817 | return PTR_ERR(opendata); | |
e56e0b78 | 818 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 819 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 820 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 821 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 822 | nfs4_opendata_put(opendata); |
864472e9 | 823 | return ret; |
1da177e4 LT |
824 | } |
825 | ||
13437e12 | 826 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
827 | { |
828 | struct nfs4_exception exception = { }; | |
539cd03a | 829 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
830 | int err; |
831 | do { | |
13437e12 | 832 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
833 | switch (err) { |
834 | case 0: | |
835 | return err; | |
836 | case -NFS4ERR_STALE_CLIENTID: | |
837 | case -NFS4ERR_STALE_STATEID: | |
838 | case -NFS4ERR_EXPIRED: | |
839 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 840 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
841 | return err; |
842 | } | |
843 | err = nfs4_handle_exception(server, err, &exception); | |
844 | } while (exception.retry); | |
845 | return err; | |
846 | } | |
847 | ||
cdd4e68b TM |
848 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
849 | { | |
850 | struct nfs4_opendata *data = calldata; | |
851 | ||
852 | data->rpc_status = task->tk_status; | |
853 | if (RPC_ASSASSINATED(task)) | |
854 | return; | |
26e976a8 | 855 | if (data->rpc_status == 0) { |
cdd4e68b TM |
856 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
857 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 858 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 859 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 860 | data->rpc_done = 1; |
26e976a8 | 861 | } |
cdd4e68b TM |
862 | } |
863 | ||
864 | static void nfs4_open_confirm_release(void *calldata) | |
865 | { | |
866 | struct nfs4_opendata *data = calldata; | |
867 | struct nfs4_state *state = NULL; | |
868 | ||
869 | /* If this request hasn't been cancelled, do nothing */ | |
870 | if (data->cancelled == 0) | |
871 | goto out_free; | |
872 | /* In case of error, no cleanup! */ | |
3e309914 | 873 | if (!data->rpc_done) |
cdd4e68b | 874 | goto out_free; |
cdd4e68b | 875 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 876 | if (!IS_ERR(state)) |
dc0b027d | 877 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 878 | out_free: |
c6d00e63 | 879 | nfs4_opendata_put(data); |
cdd4e68b TM |
880 | } |
881 | ||
882 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
883 | .rpc_call_done = nfs4_open_confirm_done, |
884 | .rpc_release = nfs4_open_confirm_release, | |
885 | }; | |
886 | ||
887 | /* | |
888 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
889 | */ | |
890 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
891 | { | |
892 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
893 | struct rpc_task *task; | |
5138fde0 TM |
894 | struct rpc_message msg = { |
895 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
896 | .rpc_argp = &data->c_arg, | |
897 | .rpc_resp = &data->c_res, | |
898 | .rpc_cred = data->owner->so_cred, | |
899 | }; | |
c970aa85 TM |
900 | struct rpc_task_setup task_setup_data = { |
901 | .rpc_client = server->client, | |
5138fde0 | 902 | .rpc_message = &msg, |
c970aa85 TM |
903 | .callback_ops = &nfs4_open_confirm_ops, |
904 | .callback_data = data, | |
101070ca | 905 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
906 | .flags = RPC_TASK_ASYNC, |
907 | }; | |
1da177e4 LT |
908 | int status; |
909 | ||
c6d00e63 | 910 | kref_get(&data->kref); |
3e309914 TM |
911 | data->rpc_done = 0; |
912 | data->rpc_status = 0; | |
5138fde0 | 913 | data->timestamp = jiffies; |
c970aa85 | 914 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 915 | if (IS_ERR(task)) |
cdd4e68b | 916 | return PTR_ERR(task); |
cdd4e68b TM |
917 | status = nfs4_wait_for_completion_rpc_task(task); |
918 | if (status != 0) { | |
919 | data->cancelled = 1; | |
920 | smp_wmb(); | |
921 | } else | |
922 | status = data->rpc_status; | |
e6b3c4db | 923 | rpc_put_task(task); |
1da177e4 LT |
924 | return status; |
925 | } | |
926 | ||
24ac23ab | 927 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 928 | { |
24ac23ab TM |
929 | struct nfs4_opendata *data = calldata; |
930 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 931 | |
24ac23ab TM |
932 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
933 | return; | |
aac00a8d TM |
934 | /* |
935 | * Check if we still need to send an OPEN call, or if we can use | |
936 | * a delegation instead. | |
937 | */ | |
938 | if (data->state != NULL) { | |
939 | struct nfs_delegation *delegation; | |
940 | ||
dc0b027d | 941 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 942 | goto out_no_action; |
aac00a8d TM |
943 | rcu_read_lock(); |
944 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
945 | if (delegation != NULL && | |
15c831bf | 946 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 947 | rcu_read_unlock(); |
6ee41268 | 948 | goto out_no_action; |
aac00a8d TM |
949 | } |
950 | rcu_read_unlock(); | |
951 | } | |
24ac23ab | 952 | /* Update sequence id. */ |
9f958ab8 | 953 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 954 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 955 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 956 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
957 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
958 | } | |
26e976a8 | 959 | data->timestamp = jiffies; |
5138fde0 | 960 | rpc_call_start(task); |
6ee41268 TM |
961 | return; |
962 | out_no_action: | |
963 | task->tk_action = NULL; | |
964 | ||
24ac23ab | 965 | } |
1da177e4 | 966 | |
24ac23ab TM |
967 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
968 | { | |
969 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 970 | |
24ac23ab TM |
971 | data->rpc_status = task->tk_status; |
972 | if (RPC_ASSASSINATED(task)) | |
973 | return; | |
974 | if (task->tk_status == 0) { | |
975 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
976 | case S_IFREG: |
977 | break; | |
978 | case S_IFLNK: | |
24ac23ab | 979 | data->rpc_status = -ELOOP; |
6f926b5b TM |
980 | break; |
981 | case S_IFDIR: | |
24ac23ab | 982 | data->rpc_status = -EISDIR; |
6f926b5b TM |
983 | break; |
984 | default: | |
24ac23ab | 985 | data->rpc_status = -ENOTDIR; |
6f926b5b | 986 | } |
26e976a8 | 987 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
988 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
989 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 990 | } |
3e309914 | 991 | data->rpc_done = 1; |
24ac23ab | 992 | } |
6f926b5b | 993 | |
24ac23ab TM |
994 | static void nfs4_open_release(void *calldata) |
995 | { | |
996 | struct nfs4_opendata *data = calldata; | |
997 | struct nfs4_state *state = NULL; | |
998 | ||
999 | /* If this request hasn't been cancelled, do nothing */ | |
1000 | if (data->cancelled == 0) | |
1001 | goto out_free; | |
1002 | /* In case of error, no cleanup! */ | |
3e309914 | 1003 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1004 | goto out_free; |
1005 | /* In case we need an open_confirm, no cleanup! */ | |
1006 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1007 | goto out_free; | |
24ac23ab | 1008 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1009 | if (!IS_ERR(state)) |
dc0b027d | 1010 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1011 | out_free: |
c6d00e63 | 1012 | nfs4_opendata_put(data); |
24ac23ab TM |
1013 | } |
1014 | ||
1015 | static const struct rpc_call_ops nfs4_open_ops = { | |
1016 | .rpc_call_prepare = nfs4_open_prepare, | |
1017 | .rpc_call_done = nfs4_open_done, | |
1018 | .rpc_release = nfs4_open_release, | |
1019 | }; | |
1020 | ||
1021 | /* | |
1022 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1023 | */ | |
1024 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1025 | { | |
1026 | struct inode *dir = data->dir->d_inode; | |
1027 | struct nfs_server *server = NFS_SERVER(dir); | |
1028 | struct nfs_openargs *o_arg = &data->o_arg; | |
1029 | struct nfs_openres *o_res = &data->o_res; | |
1030 | struct rpc_task *task; | |
5138fde0 TM |
1031 | struct rpc_message msg = { |
1032 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1033 | .rpc_argp = o_arg, | |
1034 | .rpc_resp = o_res, | |
1035 | .rpc_cred = data->owner->so_cred, | |
1036 | }; | |
c970aa85 TM |
1037 | struct rpc_task_setup task_setup_data = { |
1038 | .rpc_client = server->client, | |
5138fde0 | 1039 | .rpc_message = &msg, |
c970aa85 TM |
1040 | .callback_ops = &nfs4_open_ops, |
1041 | .callback_data = data, | |
101070ca | 1042 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1043 | .flags = RPC_TASK_ASYNC, |
1044 | }; | |
24ac23ab TM |
1045 | int status; |
1046 | ||
c6d00e63 | 1047 | kref_get(&data->kref); |
3e309914 TM |
1048 | data->rpc_done = 0; |
1049 | data->rpc_status = 0; | |
2ced46c2 | 1050 | data->cancelled = 0; |
c970aa85 | 1051 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1052 | if (IS_ERR(task)) |
24ac23ab | 1053 | return PTR_ERR(task); |
24ac23ab TM |
1054 | status = nfs4_wait_for_completion_rpc_task(task); |
1055 | if (status != 0) { | |
1056 | data->cancelled = 1; | |
1057 | smp_wmb(); | |
1058 | } else | |
1059 | status = data->rpc_status; | |
e6b3c4db | 1060 | rpc_put_task(task); |
3e309914 | 1061 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1062 | return status; |
1063 | ||
9936781d TM |
1064 | if (o_res->fh.size == 0) |
1065 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1066 | ||
56ae19f3 TM |
1067 | if (o_arg->open_flags & O_CREAT) { |
1068 | update_changeattr(dir, &o_res->cinfo); | |
1069 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1070 | } else | |
1071 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1072 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1073 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1074 | if (status != 0) |
24ac23ab | 1075 | return status; |
1da177e4 LT |
1076 | } |
1077 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1078 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1079 | return 0; |
1da177e4 LT |
1080 | } |
1081 | ||
10afec90 | 1082 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1083 | { |
7539bbab | 1084 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 1085 | int ret; |
58d9714a | 1086 | |
6b30954e | 1087 | for (;;) { |
65de872e | 1088 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e TM |
1089 | if (ret != 0) |
1090 | return ret; | |
e598d843 TM |
1091 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1092 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1093 | break; |
58d9714a | 1094 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
1095 | } |
1096 | return 0; | |
58d9714a TM |
1097 | } |
1098 | ||
1da177e4 LT |
1099 | /* |
1100 | * OPEN_EXPIRED: | |
1101 | * reclaim state on the server after a network partition. | |
1102 | * Assumes caller holds the appropriate lock | |
1103 | */ | |
539cd03a | 1104 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1105 | { |
e56e0b78 | 1106 | struct nfs4_opendata *opendata; |
864472e9 | 1107 | int ret; |
1da177e4 | 1108 | |
6f220ed5 TM |
1109 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1110 | if (IS_ERR(opendata)) | |
1111 | return PTR_ERR(opendata); | |
864472e9 | 1112 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1113 | if (ret == -ESTALE) |
539cd03a | 1114 | d_drop(ctx->path.dentry); |
c6d00e63 | 1115 | nfs4_opendata_put(opendata); |
864472e9 | 1116 | return ret; |
1da177e4 LT |
1117 | } |
1118 | ||
539cd03a | 1119 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1120 | { |
539cd03a | 1121 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1122 | struct nfs4_exception exception = { }; |
1123 | int err; | |
1124 | ||
1125 | do { | |
539cd03a | 1126 | err = _nfs4_open_expired(ctx, state); |
027b6ca0 TM |
1127 | if (err != -NFS4ERR_DELAY) |
1128 | break; | |
1129 | nfs4_handle_exception(server, err, &exception); | |
202b50dc TM |
1130 | } while (exception.retry); |
1131 | return err; | |
1132 | } | |
1133 | ||
1da177e4 LT |
1134 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1135 | { | |
1da177e4 | 1136 | struct nfs_open_context *ctx; |
864472e9 | 1137 | int ret; |
1da177e4 | 1138 | |
864472e9 TM |
1139 | ctx = nfs4_state_find_open_context(state); |
1140 | if (IS_ERR(ctx)) | |
1141 | return PTR_ERR(ctx); | |
539cd03a | 1142 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1143 | put_nfs_open_context(ctx); |
1144 | return ret; | |
1da177e4 LT |
1145 | } |
1146 | ||
aa53ed54 JL |
1147 | /* |
1148 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1149 | * fields corresponding to attributes that were used to store the verifier. | |
1150 | * Make sure we clobber those fields in the later setattr call | |
1151 | */ | |
1152 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1153 | { | |
1154 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1155 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1156 | sattr->ia_valid |= ATTR_ATIME; | |
1157 | ||
1158 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1159 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1160 | sattr->ia_valid |= ATTR_MTIME; | |
1161 | } | |
1162 | ||
1da177e4 | 1163 | /* |
24ac23ab | 1164 | * Returns a referenced nfs4_state |
1da177e4 | 1165 | */ |
dc0b027d | 1166 | static 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) |
1da177e4 LT |
1167 | { |
1168 | struct nfs4_state_owner *sp; | |
1169 | struct nfs4_state *state = NULL; | |
1170 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1171 | struct nfs4_opendata *opendata; |
aac00a8d | 1172 | int status; |
1da177e4 LT |
1173 | |
1174 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1175 | status = -ENOMEM; |
1176 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1177 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1178 | goto out_err; | |
1179 | } | |
58d9714a TM |
1180 | status = nfs4_recover_expired_lease(server); |
1181 | if (status != 0) | |
b4454fe1 | 1182 | goto err_put_state_owner; |
aac00a8d | 1183 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1184 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1185 | status = -ENOMEM; |
dc0b027d | 1186 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1187 | if (opendata == NULL) |
95d35cb4 | 1188 | goto err_put_state_owner; |
1da177e4 | 1189 | |
aac00a8d TM |
1190 | if (path->dentry->d_inode != NULL) |
1191 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1192 | ||
24ac23ab | 1193 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1194 | if (status != 0) |
c6d00e63 | 1195 | goto err_opendata_put; |
1da177e4 | 1196 | |
aa53ed54 JL |
1197 | if (opendata->o_arg.open_flags & O_EXCL) |
1198 | nfs4_exclusive_attrset(opendata, sattr); | |
1199 | ||
24ac23ab | 1200 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1201 | status = PTR_ERR(state); |
1202 | if (IS_ERR(state)) | |
c6d00e63 | 1203 | goto err_opendata_put; |
c6d00e63 | 1204 | nfs4_opendata_put(opendata); |
1da177e4 | 1205 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1206 | *res = state; |
1207 | return 0; | |
c6d00e63 TM |
1208 | err_opendata_put: |
1209 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1210 | err_put_state_owner: |
1211 | nfs4_put_state_owner(sp); | |
1da177e4 | 1212 | out_err: |
1da177e4 LT |
1213 | *res = NULL; |
1214 | return status; | |
1215 | } | |
1216 | ||
1217 | ||
dc0b027d | 1218 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) |
1da177e4 LT |
1219 | { |
1220 | struct nfs4_exception exception = { }; | |
1221 | struct nfs4_state *res; | |
1222 | int status; | |
1223 | ||
1224 | do { | |
dc0b027d | 1225 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1226 | if (status == 0) |
1227 | break; | |
1228 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1229 | * book-keeping w.r.t. state-changing operations | |
1230 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1231 | * It is actually a sign of a bug on the client or on the server. | |
1232 | * | |
1233 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1234 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1235 | * have unhashed the old state_owner for us, and that we can |
1236 | * therefore safely retry using a new one. We should still warn | |
1237 | * the user though... | |
1238 | */ | |
1239 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1240 | printk(KERN_WARNING "NFS: v4 server %s " |
1241 | " returned a bad sequence-id error!\n", | |
1242 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1243 | exception.retry = 1; |
1244 | continue; | |
1245 | } | |
550f5747 TM |
1246 | /* |
1247 | * BAD_STATEID on OPEN means that the server cancelled our | |
1248 | * state before it received the OPEN_CONFIRM. | |
1249 | * Recover by retrying the request as per the discussion | |
1250 | * on Page 181 of RFC3530. | |
1251 | */ | |
1252 | if (status == -NFS4ERR_BAD_STATEID) { | |
1253 | exception.retry = 1; | |
1254 | continue; | |
1255 | } | |
aac00a8d TM |
1256 | if (status == -EAGAIN) { |
1257 | /* We must have found a delegation */ | |
1258 | exception.retry = 1; | |
1259 | continue; | |
1260 | } | |
1da177e4 LT |
1261 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1262 | status, &exception)); | |
1263 | } while (exception.retry); | |
1264 | return res; | |
1265 | } | |
1266 | ||
659bfcd6 TM |
1267 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1268 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1269 | struct nfs4_state *state) | |
1da177e4 | 1270 | { |
3e4f6290 | 1271 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1272 | struct nfs_setattrargs arg = { |
3e4f6290 | 1273 | .fh = NFS_FH(inode), |
1da177e4 LT |
1274 | .iap = sattr, |
1275 | .server = server, | |
1276 | .bitmask = server->attr_bitmask, | |
1277 | }; | |
1278 | struct nfs_setattrres res = { | |
1279 | .fattr = fattr, | |
1280 | .server = server, | |
1281 | }; | |
1282 | struct rpc_message msg = { | |
659bfcd6 TM |
1283 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1284 | .rpc_argp = &arg, | |
1285 | .rpc_resp = &res, | |
1286 | .rpc_cred = cred, | |
1da177e4 | 1287 | }; |
26e976a8 | 1288 | unsigned long timestamp = jiffies; |
65e4308d | 1289 | int status; |
1da177e4 | 1290 | |
0e574af1 | 1291 | nfs_fattr_init(fattr); |
1da177e4 | 1292 | |
3e4f6290 TM |
1293 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1294 | /* Use that stateid */ | |
1295 | } else if (state != NULL) { | |
08e9eac4 TM |
1296 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1297 | } else | |
1da177e4 LT |
1298 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1299 | ||
cccef3b9 | 1300 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1301 | if (status == 0 && state != NULL) |
1302 | renew_lease(server, timestamp); | |
65e4308d | 1303 | return status; |
1da177e4 LT |
1304 | } |
1305 | ||
659bfcd6 TM |
1306 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1307 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1308 | struct nfs4_state *state) | |
1da177e4 | 1309 | { |
3e4f6290 | 1310 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1311 | struct nfs4_exception exception = { }; |
1312 | int err; | |
1313 | do { | |
1314 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1315 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1316 | &exception); |
1317 | } while (exception.retry); | |
1318 | return err; | |
1319 | } | |
1320 | ||
1321 | struct nfs4_closedata { | |
4a35bd41 | 1322 | struct path path; |
1da177e4 LT |
1323 | struct inode *inode; |
1324 | struct nfs4_state *state; | |
1325 | struct nfs_closeargs arg; | |
1326 | struct nfs_closeres res; | |
516a6af6 | 1327 | struct nfs_fattr fattr; |
26e976a8 | 1328 | unsigned long timestamp; |
1da177e4 LT |
1329 | }; |
1330 | ||
963d8fe5 | 1331 | static void nfs4_free_closedata(void *data) |
9512135d | 1332 | { |
963d8fe5 TM |
1333 | struct nfs4_closedata *calldata = data; |
1334 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1335 | |
1336 | nfs4_put_open_state(calldata->state); | |
1337 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1338 | nfs4_put_state_owner(sp); |
31f31db1 | 1339 | path_put(&calldata->path); |
9512135d TM |
1340 | kfree(calldata); |
1341 | } | |
1342 | ||
963d8fe5 | 1343 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1344 | { |
963d8fe5 | 1345 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1346 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1347 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1348 | ||
4ce70ada TM |
1349 | if (RPC_ASSASSINATED(task)) |
1350 | return; | |
1da177e4 LT |
1351 | /* hmm. we are done with the inode, and in the process of freeing |
1352 | * the state_owner. we keep this around to process errors | |
1353 | */ | |
1da177e4 LT |
1354 | switch (task->tk_status) { |
1355 | case 0: | |
45328c35 | 1356 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1357 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1358 | break; |
1359 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1360 | case -NFS4ERR_OLD_STATEID: |
1361 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1362 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1363 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1364 | break; |
1da177e4 | 1365 | default: |
9e33bed5 | 1366 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { |
1da177e4 LT |
1367 | rpc_restart_call(task); |
1368 | return; | |
1369 | } | |
1370 | } | |
516a6af6 | 1371 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1372 | } |
1373 | ||
4ce70ada | 1374 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1375 | { |
4ce70ada | 1376 | struct nfs4_closedata *calldata = data; |
9512135d | 1377 | struct nfs4_state *state = calldata->state; |
003707c7 | 1378 | int clear_rd, clear_wr, clear_rdwr; |
9512135d | 1379 | |
963d8fe5 | 1380 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1381 | return; |
003707c7 | 1382 | |
003707c7 | 1383 | clear_rd = clear_wr = clear_rdwr = 0; |
4cecb76f | 1384 | spin_lock(&state->owner->so_lock); |
003707c7 | 1385 | /* Calculate the change in open mode */ |
e7616923 | 1386 | if (state->n_rdwr == 0) { |
003707c7 | 1387 | if (state->n_rdonly == 0) { |
003707c7 TM |
1388 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
1389 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1390 | } | |
1391 | if (state->n_wronly == 0) { | |
003707c7 TM |
1392 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
1393 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1394 | } | |
e7616923 | 1395 | } |
4cecb76f | 1396 | spin_unlock(&state->owner->so_lock); |
003707c7 | 1397 | if (!clear_rd && !clear_wr && !clear_rdwr) { |
963d8fe5 TM |
1398 | /* Note: exit _without_ calling nfs4_close_done */ |
1399 | task->tk_action = NULL; | |
9512135d TM |
1400 | return; |
1401 | } | |
516a6af6 | 1402 | nfs_fattr_init(calldata->res.fattr); |
45328c35 | 1403 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1404 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1405 | calldata->arg.fmode = FMODE_READ; |
45328c35 | 1406 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1407 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1408 | calldata->arg.fmode = FMODE_WRITE; |
45328c35 | 1409 | } |
26e976a8 | 1410 | calldata->timestamp = jiffies; |
5138fde0 | 1411 | rpc_call_start(task); |
1da177e4 LT |
1412 | } |
1413 | ||
963d8fe5 | 1414 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1415 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1416 | .rpc_call_done = nfs4_close_done, |
1417 | .rpc_release = nfs4_free_closedata, | |
1418 | }; | |
1419 | ||
1da177e4 LT |
1420 | /* |
1421 | * It is possible for data to be read/written from a mem-mapped file | |
1422 | * after the sys_close call (which hits the vfs layer as a flush). | |
1423 | * This means that we can't safely call nfsv4 close on a file until | |
1424 | * the inode is cleared. This in turn means that we are not good | |
1425 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1426 | * share state even when we are done with one of the three share | |
1427 | * stateid's in the inode. | |
1428 | * | |
1429 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1430 | */ | |
a49c3c77 | 1431 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1432 | { |
4a35bd41 | 1433 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1434 | struct nfs4_closedata *calldata; |
b39e625b TM |
1435 | struct nfs4_state_owner *sp = state->owner; |
1436 | struct rpc_task *task; | |
5138fde0 TM |
1437 | struct rpc_message msg = { |
1438 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1439 | .rpc_cred = state->owner->so_cred, | |
1440 | }; | |
c970aa85 TM |
1441 | struct rpc_task_setup task_setup_data = { |
1442 | .rpc_client = server->client, | |
5138fde0 | 1443 | .rpc_message = &msg, |
c970aa85 | 1444 | .callback_ops = &nfs4_close_ops, |
101070ca | 1445 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1446 | .flags = RPC_TASK_ASYNC, |
1447 | }; | |
9512135d | 1448 | int status = -ENOMEM; |
1da177e4 | 1449 | |
9512135d | 1450 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1451 | if (calldata == NULL) |
9512135d | 1452 | goto out; |
4a35bd41 | 1453 | calldata->inode = state->inode; |
1da177e4 | 1454 | calldata->state = state; |
4a35bd41 | 1455 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1456 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1457 | /* Serialization for the sequence id */ |
cee54fc9 | 1458 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1459 | if (calldata->arg.seqid == NULL) |
1460 | goto out_free_calldata; | |
dc0b027d | 1461 | calldata->arg.fmode = 0; |
a65318bf | 1462 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1463 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1464 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1465 | calldata->res.server = server; |
4a35bd41 TM |
1466 | calldata->path.mnt = mntget(path->mnt); |
1467 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1468 | |
5138fde0 TM |
1469 | msg.rpc_argp = &calldata->arg, |
1470 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1471 | task_setup_data.callback_data = calldata; |
1472 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1473 | if (IS_ERR(task)) |
1474 | return PTR_ERR(task); | |
a49c3c77 TM |
1475 | status = 0; |
1476 | if (wait) | |
1477 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1478 | rpc_put_task(task); |
a49c3c77 | 1479 | return status; |
9512135d TM |
1480 | out_free_calldata: |
1481 | kfree(calldata); | |
1482 | out: | |
b39e625b TM |
1483 | nfs4_put_open_state(state); |
1484 | nfs4_put_state_owner(sp); | |
9512135d | 1485 | return status; |
1da177e4 LT |
1486 | } |
1487 | ||
dc0b027d | 1488 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1489 | { |
1490 | struct file *filp; | |
1b45c46c | 1491 | int ret; |
02a913a7 | 1492 | |
1b45c46c | 1493 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1494 | if (fmode & FMODE_EXEC) { |
af22f94a | 1495 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1496 | state->owner->so_cred, |
1497 | nd->intent.open.flags); | |
1498 | if (ret < 0) | |
1499 | goto out_close; | |
1500 | } | |
4a35bd41 | 1501 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1502 | if (!IS_ERR(filp)) { |
1503 | struct nfs_open_context *ctx; | |
cd3758e3 | 1504 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1505 | ctx->state = state; |
95cf959b TM |
1506 | return 0; |
1507 | } | |
1b45c46c TM |
1508 | ret = PTR_ERR(filp); |
1509 | out_close: | |
dc0b027d | 1510 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1511 | return ret; |
02a913a7 TM |
1512 | } |
1513 | ||
1514 | struct dentry * | |
1da177e4 LT |
1515 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1516 | { | |
ad389da7 | 1517 | struct path path = { |
4ac91378 | 1518 | .mnt = nd->path.mnt, |
ad389da7 TM |
1519 | .dentry = dentry, |
1520 | }; | |
4ac91378 | 1521 | struct dentry *parent; |
1da177e4 LT |
1522 | struct iattr attr; |
1523 | struct rpc_cred *cred; | |
1524 | struct nfs4_state *state; | |
02a913a7 | 1525 | struct dentry *res; |
dc0b027d | 1526 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
1527 | |
1528 | if (nd->flags & LOOKUP_CREATE) { | |
1529 | attr.ia_mode = nd->intent.open.create_mode; | |
1530 | attr.ia_valid = ATTR_MODE; | |
1531 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 1532 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
1533 | } else { |
1534 | attr.ia_valid = 0; | |
1535 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1536 | } | |
1537 | ||
98a8e323 | 1538 | cred = rpc_lookup_cred(); |
1da177e4 | 1539 | if (IS_ERR(cred)) |
02a913a7 | 1540 | return (struct dentry *)cred; |
565277f6 TM |
1541 | parent = dentry->d_parent; |
1542 | /* Protect against concurrent sillydeletes */ | |
1543 | nfs_block_sillyrename(parent); | |
dc0b027d | 1544 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1545 | put_rpccred(cred); |
02a913a7 | 1546 | if (IS_ERR(state)) { |
d75340cc | 1547 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 1548 | d_add(dentry, NULL); |
d75340cc TM |
1549 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1550 | } | |
565277f6 | 1551 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
1552 | return (struct dentry *)state; |
1553 | } | |
24ac23ab | 1554 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 1555 | if (res != NULL) |
deee9369 | 1556 | path.dentry = res; |
d75340cc | 1557 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 1558 | nfs_unblock_sillyrename(parent); |
dc0b027d | 1559 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 1560 | return res; |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | int | |
02a913a7 | 1564 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1565 | { |
ad389da7 | 1566 | struct path path = { |
4ac91378 | 1567 | .mnt = nd->path.mnt, |
ad389da7 TM |
1568 | .dentry = dentry, |
1569 | }; | |
1da177e4 LT |
1570 | struct rpc_cred *cred; |
1571 | struct nfs4_state *state; | |
dc0b027d | 1572 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 1573 | |
98a8e323 | 1574 | cred = rpc_lookup_cred(); |
1da177e4 LT |
1575 | if (IS_ERR(cred)) |
1576 | return PTR_ERR(cred); | |
dc0b027d | 1577 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 1578 | put_rpccred(cred); |
02a913a7 TM |
1579 | if (IS_ERR(state)) { |
1580 | switch (PTR_ERR(state)) { | |
1581 | case -EPERM: | |
1582 | case -EACCES: | |
1583 | case -EDQUOT: | |
1584 | case -ENOSPC: | |
1585 | case -EROFS: | |
1586 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1587 | return 1; | |
b87c0adf CL |
1588 | default: |
1589 | goto out_drop; | |
02a913a7 | 1590 | } |
02a913a7 | 1591 | } |
24ac23ab | 1592 | if (state->inode == dentry->d_inode) { |
d75340cc | 1593 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 1594 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
1595 | return 1; |
1596 | } | |
dc0b027d | 1597 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
1598 | out_drop: |
1599 | d_drop(dentry); | |
1da177e4 LT |
1600 | return 0; |
1601 | } | |
1602 | ||
7fe5c398 TM |
1603 | void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
1604 | { | |
1605 | if (ctx->state == NULL) | |
1606 | return; | |
1607 | if (is_sync) | |
1608 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
1609 | else | |
1610 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
1611 | } | |
1da177e4 LT |
1612 | |
1613 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1614 | { | |
43652ad5 BH |
1615 | struct nfs4_server_caps_arg args = { |
1616 | .fhandle = fhandle, | |
1617 | }; | |
1da177e4 LT |
1618 | struct nfs4_server_caps_res res = {}; |
1619 | struct rpc_message msg = { | |
1620 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 1621 | .rpc_argp = &args, |
1da177e4 LT |
1622 | .rpc_resp = &res, |
1623 | }; | |
1624 | int status; | |
1625 | ||
cccef3b9 | 1626 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1627 | if (status == 0) { |
1628 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1629 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1630 | server->caps |= NFS_CAP_ACLS; | |
1631 | if (res.has_links != 0) | |
1632 | server->caps |= NFS_CAP_HARDLINKS; | |
1633 | if (res.has_symlinks != 0) | |
1634 | server->caps |= NFS_CAP_SYMLINKS; | |
a65318bf TM |
1635 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
1636 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
1637 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
1638 | server->acl_bitmask = res.acl_bitmask; |
1639 | } | |
cccef3b9 | 1640 | |
1da177e4 LT |
1641 | return status; |
1642 | } | |
1643 | ||
55a97593 | 1644 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1645 | { |
1646 | struct nfs4_exception exception = { }; | |
1647 | int err; | |
1648 | do { | |
1649 | err = nfs4_handle_exception(server, | |
1650 | _nfs4_server_capabilities(server, fhandle), | |
1651 | &exception); | |
1652 | } while (exception.retry); | |
1653 | return err; | |
1654 | } | |
1655 | ||
1656 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1657 | struct nfs_fsinfo *info) | |
1658 | { | |
1da177e4 LT |
1659 | struct nfs4_lookup_root_arg args = { |
1660 | .bitmask = nfs4_fattr_bitmap, | |
1661 | }; | |
1662 | struct nfs4_lookup_res res = { | |
1663 | .server = server, | |
0e574af1 | 1664 | .fattr = info->fattr, |
1da177e4 LT |
1665 | .fh = fhandle, |
1666 | }; | |
1667 | struct rpc_message msg = { | |
1668 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1669 | .rpc_argp = &args, | |
1670 | .rpc_resp = &res, | |
1671 | }; | |
0e574af1 | 1672 | nfs_fattr_init(info->fattr); |
cccef3b9 | 1673 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1674 | } |
1675 | ||
1676 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1677 | struct nfs_fsinfo *info) | |
1678 | { | |
1679 | struct nfs4_exception exception = { }; | |
1680 | int err; | |
1681 | do { | |
1682 | err = nfs4_handle_exception(server, | |
1683 | _nfs4_lookup_root(server, fhandle, info), | |
1684 | &exception); | |
1685 | } while (exception.retry); | |
1686 | return err; | |
1687 | } | |
1688 | ||
54ceac45 DH |
1689 | /* |
1690 | * get the file handle for the "/" directory on the server | |
1691 | */ | |
1da177e4 | 1692 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1693 | struct nfs_fsinfo *info) |
1da177e4 | 1694 | { |
1da177e4 LT |
1695 | int status; |
1696 | ||
1da177e4 | 1697 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
1698 | if (status == 0) |
1699 | status = nfs4_server_capabilities(server, fhandle); | |
1700 | if (status == 0) | |
1701 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 1702 | return nfs4_map_errors(status); |
1da177e4 LT |
1703 | } |
1704 | ||
6b97fd3d MN |
1705 | /* |
1706 | * Get locations and (maybe) other attributes of a referral. | |
1707 | * Note that we'll actually follow the referral later when | |
1708 | * we detect fsid mismatch in inode revalidation | |
1709 | */ | |
56659e99 | 1710 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
1711 | { |
1712 | int status = -ENOMEM; | |
1713 | struct page *page = NULL; | |
1714 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
1715 | |
1716 | page = alloc_page(GFP_KERNEL); | |
1717 | if (page == NULL) | |
1718 | goto out; | |
1719 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1720 | if (locations == NULL) | |
1721 | goto out; | |
1722 | ||
c228fd3a | 1723 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
1724 | if (status != 0) |
1725 | goto out; | |
1726 | /* Make sure server returned a different fsid for the referral */ | |
1727 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 1728 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
1729 | status = -EIO; |
1730 | goto out; | |
1731 | } | |
1732 | ||
1733 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1734 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1735 | if (!fattr->mode) | |
1736 | fattr->mode = S_IFDIR; | |
1737 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1738 | out: | |
1739 | if (page) | |
1740 | __free_page(page); | |
1741 | if (locations) | |
1742 | kfree(locations); | |
1743 | return status; | |
1744 | } | |
1745 | ||
1da177e4 LT |
1746 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1747 | { | |
1748 | struct nfs4_getattr_arg args = { | |
1749 | .fh = fhandle, | |
1750 | .bitmask = server->attr_bitmask, | |
1751 | }; | |
1752 | struct nfs4_getattr_res res = { | |
1753 | .fattr = fattr, | |
1754 | .server = server, | |
1755 | }; | |
1756 | struct rpc_message msg = { | |
1757 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1758 | .rpc_argp = &args, | |
1759 | .rpc_resp = &res, | |
1760 | }; | |
1761 | ||
0e574af1 | 1762 | nfs_fattr_init(fattr); |
cccef3b9 | 1763 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1764 | } |
1765 | ||
1766 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1767 | { | |
1768 | struct nfs4_exception exception = { }; | |
1769 | int err; | |
1770 | do { | |
1771 | err = nfs4_handle_exception(server, | |
1772 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1773 | &exception); | |
1774 | } while (exception.retry); | |
1775 | return err; | |
1776 | } | |
1777 | ||
1778 | /* | |
1779 | * The file is not closed if it is opened due to the a request to change | |
1780 | * the size of the file. The open call will not be needed once the | |
1781 | * VFS layer lookup-intents are implemented. | |
1782 | * | |
1783 | * Close is called when the inode is destroyed. | |
1784 | * If we haven't opened the file for O_WRONLY, we | |
1785 | * need to in the size_change case to obtain a stateid. | |
1786 | * | |
1787 | * Got race? | |
1788 | * Because OPEN is always done by name in nfsv4, it is | |
1789 | * possible that we opened a different file by the same | |
1790 | * name. We can recognize this race condition, but we | |
1791 | * can't do anything about it besides returning an error. | |
1792 | * | |
1793 | * This will be fixed with VFS changes (lookup-intent). | |
1794 | */ | |
1795 | static int | |
1796 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1797 | struct iattr *sattr) | |
1798 | { | |
08e9eac4 | 1799 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 1800 | struct rpc_cred *cred = NULL; |
d530838b | 1801 | struct nfs4_state *state = NULL; |
1da177e4 LT |
1802 | int status; |
1803 | ||
0e574af1 | 1804 | nfs_fattr_init(fattr); |
1da177e4 | 1805 | |
d530838b | 1806 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
1807 | if (sattr->ia_valid & ATTR_FILE) { |
1808 | struct nfs_open_context *ctx; | |
1809 | ||
1810 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
1811 | if (ctx) { |
1812 | cred = ctx->cred; | |
1813 | state = ctx->state; | |
1814 | } | |
659bfcd6 | 1815 | } |
08e9eac4 | 1816 | |
659bfcd6 | 1817 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
1818 | if (status == 0) |
1819 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
1820 | return status; |
1821 | } | |
1822 | ||
56659e99 TM |
1823 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
1824 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
1825 | struct nfs_fattr *fattr) |
1826 | { | |
1827 | int status; | |
1828 | struct nfs4_lookup_arg args = { | |
1829 | .bitmask = server->attr_bitmask, | |
1830 | .dir_fh = dirfh, | |
1831 | .name = name, | |
1832 | }; | |
1833 | struct nfs4_lookup_res res = { | |
1834 | .server = server, | |
1835 | .fattr = fattr, | |
1836 | .fh = fhandle, | |
1837 | }; | |
1838 | struct rpc_message msg = { | |
1839 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1840 | .rpc_argp = &args, | |
1841 | .rpc_resp = &res, | |
1842 | }; | |
1843 | ||
1844 | nfs_fattr_init(fattr); | |
1845 | ||
1846 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 1847 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 1848 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
1849 | return status; |
1850 | } | |
1851 | ||
1852 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
1853 | struct qstr *name, struct nfs_fh *fhandle, | |
1854 | struct nfs_fattr *fattr) | |
1855 | { | |
1856 | struct nfs4_exception exception = { }; | |
1857 | int err; | |
1858 | do { | |
4e56e082 TM |
1859 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
1860 | /* FIXME: !!!! */ | |
1861 | if (err == -NFS4ERR_MOVED) { | |
1862 | err = -EREMOTE; | |
1863 | break; | |
1864 | } | |
1865 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
1866 | } while (exception.retry); |
1867 | return err; | |
1868 | } | |
1869 | ||
56659e99 | 1870 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
1871 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1872 | { | |
4e56e082 | 1873 | int status; |
1da177e4 LT |
1874 | |
1875 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 1876 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
1877 | if (status == -NFS4ERR_MOVED) |
1878 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
1879 | dprintk("NFS reply lookup: %d\n", status); |
1880 | return status; | |
1881 | } | |
1882 | ||
1883 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1884 | { | |
1885 | struct nfs4_exception exception = { }; | |
1886 | int err; | |
1887 | do { | |
1888 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1889 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1890 | &exception); | |
1891 | } while (exception.retry); | |
1892 | return err; | |
1893 | } | |
1894 | ||
1895 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1896 | { | |
76b32999 TM |
1897 | struct nfs_server *server = NFS_SERVER(inode); |
1898 | struct nfs_fattr fattr; | |
1da177e4 LT |
1899 | struct nfs4_accessargs args = { |
1900 | .fh = NFS_FH(inode), | |
76b32999 TM |
1901 | .bitmask = server->attr_bitmask, |
1902 | }; | |
1903 | struct nfs4_accessres res = { | |
1904 | .server = server, | |
1905 | .fattr = &fattr, | |
1da177e4 | 1906 | }; |
1da177e4 LT |
1907 | struct rpc_message msg = { |
1908 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1909 | .rpc_argp = &args, | |
1910 | .rpc_resp = &res, | |
1911 | .rpc_cred = entry->cred, | |
1912 | }; | |
1913 | int mode = entry->mask; | |
1914 | int status; | |
1915 | ||
1916 | /* | |
1917 | * Determine which access bits we want to ask for... | |
1918 | */ | |
1919 | if (mode & MAY_READ) | |
1920 | args.access |= NFS4_ACCESS_READ; | |
1921 | if (S_ISDIR(inode->i_mode)) { | |
1922 | if (mode & MAY_WRITE) | |
1923 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1924 | if (mode & MAY_EXEC) | |
1925 | args.access |= NFS4_ACCESS_LOOKUP; | |
1926 | } else { | |
1927 | if (mode & MAY_WRITE) | |
1928 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1929 | if (mode & MAY_EXEC) | |
1930 | args.access |= NFS4_ACCESS_EXECUTE; | |
1931 | } | |
76b32999 | 1932 | nfs_fattr_init(&fattr); |
cccef3b9 | 1933 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1934 | if (!status) { |
1935 | entry->mask = 0; | |
1936 | if (res.access & NFS4_ACCESS_READ) | |
1937 | entry->mask |= MAY_READ; | |
1938 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1939 | entry->mask |= MAY_WRITE; | |
1940 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1941 | entry->mask |= MAY_EXEC; | |
76b32999 | 1942 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
1943 | } |
1944 | return status; | |
1945 | } | |
1946 | ||
1947 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1948 | { | |
1949 | struct nfs4_exception exception = { }; | |
1950 | int err; | |
1951 | do { | |
1952 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1953 | _nfs4_proc_access(inode, entry), | |
1954 | &exception); | |
1955 | } while (exception.retry); | |
1956 | return err; | |
1957 | } | |
1958 | ||
1959 | /* | |
1960 | * TODO: For the time being, we don't try to get any attributes | |
1961 | * along with any of the zero-copy operations READ, READDIR, | |
1962 | * READLINK, WRITE. | |
1963 | * | |
1964 | * In the case of the first three, we want to put the GETATTR | |
1965 | * after the read-type operation -- this is because it is hard | |
1966 | * to predict the length of a GETATTR response in v4, and thus | |
1967 | * align the READ data correctly. This means that the GETATTR | |
1968 | * may end up partially falling into the page cache, and we should | |
1969 | * shift it into the 'tail' of the xdr_buf before processing. | |
1970 | * To do this efficiently, we need to know the total length | |
1971 | * of data received, which doesn't seem to be available outside | |
1972 | * of the RPC layer. | |
1973 | * | |
1974 | * In the case of WRITE, we also want to put the GETATTR after | |
1975 | * the operation -- in this case because we want to make sure | |
1976 | * we get the post-operation mtime and size. This means that | |
1977 | * we can't use xdr_encode_pages() as written: we need a variant | |
1978 | * of it which would leave room in the 'tail' iovec. | |
1979 | * | |
1980 | * Both of these changes to the XDR layer would in fact be quite | |
1981 | * minor, but I decided to leave them for a subsequent patch. | |
1982 | */ | |
1983 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1984 | unsigned int pgbase, unsigned int pglen) | |
1985 | { | |
1986 | struct nfs4_readlink args = { | |
1987 | .fh = NFS_FH(inode), | |
1988 | .pgbase = pgbase, | |
1989 | .pglen = pglen, | |
1990 | .pages = &page, | |
1991 | }; | |
f50c7000 | 1992 | struct nfs4_readlink_res res; |
1da177e4 LT |
1993 | struct rpc_message msg = { |
1994 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1995 | .rpc_argp = &args, | |
f50c7000 | 1996 | .rpc_resp = &res, |
1da177e4 LT |
1997 | }; |
1998 | ||
cccef3b9 | 1999 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2000 | } |
2001 | ||
2002 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2003 | unsigned int pgbase, unsigned int pglen) | |
2004 | { | |
2005 | struct nfs4_exception exception = { }; | |
2006 | int err; | |
2007 | do { | |
2008 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2009 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2010 | &exception); | |
2011 | } while (exception.retry); | |
2012 | return err; | |
2013 | } | |
2014 | ||
1da177e4 LT |
2015 | /* |
2016 | * Got race? | |
2017 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2018 | * Until then, this create/open method is prone to inefficiency and race | |
2019 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2020 | * placed on the wire. | |
2021 | * | |
2022 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2023 | * The file will be opened again in the subsequent VFS open call | |
2024 | * (nfs4_proc_file_open). | |
2025 | * | |
2026 | * The open for read will just hang around to be used by any process that | |
2027 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2028 | */ | |
2029 | ||
2030 | static int | |
2031 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2032 | int flags, struct nameidata *nd) |
1da177e4 | 2033 | { |
ad389da7 | 2034 | struct path path = { |
4ac91378 | 2035 | .mnt = nd->path.mnt, |
ad389da7 TM |
2036 | .dentry = dentry, |
2037 | }; | |
1da177e4 LT |
2038 | struct nfs4_state *state; |
2039 | struct rpc_cred *cred; | |
dc0b027d | 2040 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2041 | int status = 0; |
2042 | ||
98a8e323 | 2043 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2044 | if (IS_ERR(cred)) { |
2045 | status = PTR_ERR(cred); | |
2046 | goto out; | |
2047 | } | |
dc0b027d | 2048 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2049 | d_drop(dentry); |
1da177e4 LT |
2050 | if (IS_ERR(state)) { |
2051 | status = PTR_ERR(state); | |
659bfcd6 | 2052 | goto out_putcred; |
1da177e4 | 2053 | } |
d4d9cdcb | 2054 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2055 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2056 | if (flags & O_EXCL) { |
2057 | struct nfs_fattr fattr; | |
659bfcd6 | 2058 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2059 | if (status == 0) |
65e4308d | 2060 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2061 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2062 | } |
ad389da7 | 2063 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2064 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2065 | else |
dc0b027d | 2066 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2067 | out_putcred: |
2068 | put_rpccred(cred); | |
1da177e4 LT |
2069 | out: |
2070 | return status; | |
2071 | } | |
2072 | ||
2073 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2074 | { | |
16e42959 | 2075 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2076 | struct nfs_removeargs args = { |
1da177e4 | 2077 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2078 | .name.len = name->len, |
2079 | .name.name = name->name, | |
16e42959 TM |
2080 | .bitmask = server->attr_bitmask, |
2081 | }; | |
4fdc17b2 | 2082 | struct nfs_removeres res = { |
16e42959 | 2083 | .server = server, |
1da177e4 | 2084 | }; |
1da177e4 | 2085 | struct rpc_message msg = { |
4fdc17b2 TM |
2086 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2087 | .rpc_argp = &args, | |
2088 | .rpc_resp = &res, | |
1da177e4 LT |
2089 | }; |
2090 | int status; | |
2091 | ||
4fdc17b2 | 2092 | nfs_fattr_init(&res.dir_attr); |
cccef3b9 | 2093 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2094 | if (status == 0) { |
2095 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2096 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2097 | } |
1da177e4 LT |
2098 | return status; |
2099 | } | |
2100 | ||
2101 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2102 | { | |
2103 | struct nfs4_exception exception = { }; | |
2104 | int err; | |
2105 | do { | |
2106 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2107 | _nfs4_proc_remove(dir, name), | |
2108 | &exception); | |
2109 | } while (exception.retry); | |
2110 | return err; | |
2111 | } | |
2112 | ||
e4eff1a6 | 2113 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2114 | { |
e4eff1a6 TM |
2115 | struct nfs_server *server = NFS_SERVER(dir); |
2116 | struct nfs_removeargs *args = msg->rpc_argp; | |
2117 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2118 | |
a65318bf | 2119 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2120 | res->server = server; |
1da177e4 | 2121 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2122 | } |
2123 | ||
e4eff1a6 | 2124 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2125 | { |
e4eff1a6 TM |
2126 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2127 | ||
9e33bed5 | 2128 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2129 | return 0; |
2130 | update_changeattr(dir, &res->cinfo); | |
2131 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2132 | return 1; | |
1da177e4 LT |
2133 | } |
2134 | ||
2135 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2136 | struct inode *new_dir, struct qstr *new_name) | |
2137 | { | |
6caf2c82 | 2138 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2139 | struct nfs4_rename_arg arg = { |
2140 | .old_dir = NFS_FH(old_dir), | |
2141 | .new_dir = NFS_FH(new_dir), | |
2142 | .old_name = old_name, | |
2143 | .new_name = new_name, | |
6caf2c82 TM |
2144 | .bitmask = server->attr_bitmask, |
2145 | }; | |
2146 | struct nfs_fattr old_fattr, new_fattr; | |
2147 | struct nfs4_rename_res res = { | |
2148 | .server = server, | |
2149 | .old_fattr = &old_fattr, | |
2150 | .new_fattr = &new_fattr, | |
1da177e4 | 2151 | }; |
1da177e4 LT |
2152 | struct rpc_message msg = { |
2153 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2154 | .rpc_argp = &arg, | |
2155 | .rpc_resp = &res, | |
2156 | }; | |
2157 | int status; | |
2158 | ||
6caf2c82 TM |
2159 | nfs_fattr_init(res.old_fattr); |
2160 | nfs_fattr_init(res.new_fattr); | |
cccef3b9 | 2161 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2162 | |
2163 | if (!status) { | |
2164 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2165 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2166 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2167 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2168 | } |
2169 | return status; | |
2170 | } | |
2171 | ||
2172 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2173 | struct inode *new_dir, struct qstr *new_name) | |
2174 | { | |
2175 | struct nfs4_exception exception = { }; | |
2176 | int err; | |
2177 | do { | |
2178 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2179 | _nfs4_proc_rename(old_dir, old_name, | |
2180 | new_dir, new_name), | |
2181 | &exception); | |
2182 | } while (exception.retry); | |
2183 | return err; | |
2184 | } | |
2185 | ||
2186 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2187 | { | |
91ba2eee | 2188 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2189 | struct nfs4_link_arg arg = { |
2190 | .fh = NFS_FH(inode), | |
2191 | .dir_fh = NFS_FH(dir), | |
2192 | .name = name, | |
91ba2eee TM |
2193 | .bitmask = server->attr_bitmask, |
2194 | }; | |
2195 | struct nfs_fattr fattr, dir_attr; | |
2196 | struct nfs4_link_res res = { | |
2197 | .server = server, | |
2198 | .fattr = &fattr, | |
2199 | .dir_attr = &dir_attr, | |
1da177e4 | 2200 | }; |
1da177e4 LT |
2201 | struct rpc_message msg = { |
2202 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2203 | .rpc_argp = &arg, | |
91ba2eee | 2204 | .rpc_resp = &res, |
1da177e4 LT |
2205 | }; |
2206 | int status; | |
2207 | ||
91ba2eee TM |
2208 | nfs_fattr_init(res.fattr); |
2209 | nfs_fattr_init(res.dir_attr); | |
cccef3b9 | 2210 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2211 | if (!status) { |
2212 | update_changeattr(dir, &res.cinfo); | |
2213 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2214 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2215 | } |
1da177e4 LT |
2216 | |
2217 | return status; | |
2218 | } | |
2219 | ||
2220 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2221 | { | |
2222 | struct nfs4_exception exception = { }; | |
2223 | int err; | |
2224 | do { | |
2225 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2226 | _nfs4_proc_link(inode, dir, name), | |
2227 | &exception); | |
2228 | } while (exception.retry); | |
2229 | return err; | |
2230 | } | |
2231 | ||
57dc9a57 TM |
2232 | struct nfs4_createdata { |
2233 | struct rpc_message msg; | |
2234 | struct nfs4_create_arg arg; | |
2235 | struct nfs4_create_res res; | |
2236 | struct nfs_fh fh; | |
2237 | struct nfs_fattr fattr; | |
2238 | struct nfs_fattr dir_fattr; | |
2239 | }; | |
2240 | ||
2241 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2242 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2243 | { | |
2244 | struct nfs4_createdata *data; | |
2245 | ||
2246 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2247 | if (data != NULL) { | |
2248 | struct nfs_server *server = NFS_SERVER(dir); | |
2249 | ||
2250 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2251 | data->msg.rpc_argp = &data->arg; | |
2252 | data->msg.rpc_resp = &data->res; | |
2253 | data->arg.dir_fh = NFS_FH(dir); | |
2254 | data->arg.server = server; | |
2255 | data->arg.name = name; | |
2256 | data->arg.attrs = sattr; | |
2257 | data->arg.ftype = ftype; | |
2258 | data->arg.bitmask = server->attr_bitmask; | |
2259 | data->res.server = server; | |
2260 | data->res.fh = &data->fh; | |
2261 | data->res.fattr = &data->fattr; | |
2262 | data->res.dir_fattr = &data->dir_fattr; | |
2263 | nfs_fattr_init(data->res.fattr); | |
2264 | nfs_fattr_init(data->res.dir_fattr); | |
2265 | } | |
2266 | return data; | |
2267 | } | |
2268 | ||
2269 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2270 | { | |
cccef3b9 AA |
2271 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2272 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2273 | if (status == 0) { |
2274 | update_changeattr(dir, &data->res.dir_cinfo); | |
2275 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2276 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2277 | } | |
2278 | return status; | |
2279 | } | |
2280 | ||
2281 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2282 | { | |
2283 | kfree(data); | |
2284 | } | |
2285 | ||
4f390c15 | 2286 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2287 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2288 | { |
57dc9a57 TM |
2289 | struct nfs4_createdata *data; |
2290 | int status = -ENAMETOOLONG; | |
1da177e4 | 2291 | |
94a6d753 | 2292 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2293 | goto out; |
4f390c15 | 2294 | |
57dc9a57 TM |
2295 | status = -ENOMEM; |
2296 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2297 | if (data == NULL) | |
2298 | goto out; | |
2299 | ||
2300 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2301 | data->arg.u.symlink.pages = &page; | |
2302 | data->arg.u.symlink.len = len; | |
1da177e4 | 2303 | |
57dc9a57 TM |
2304 | status = nfs4_do_create(dir, dentry, data); |
2305 | ||
2306 | nfs4_free_createdata(data); | |
2307 | out: | |
1da177e4 LT |
2308 | return status; |
2309 | } | |
2310 | ||
4f390c15 | 2311 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2312 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2313 | { |
2314 | struct nfs4_exception exception = { }; | |
2315 | int err; | |
2316 | do { | |
2317 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2318 | _nfs4_proc_symlink(dir, dentry, page, |
2319 | len, sattr), | |
1da177e4 LT |
2320 | &exception); |
2321 | } while (exception.retry); | |
2322 | return err; | |
2323 | } | |
2324 | ||
2325 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2326 | struct iattr *sattr) | |
2327 | { | |
57dc9a57 TM |
2328 | struct nfs4_createdata *data; |
2329 | int status = -ENOMEM; | |
1da177e4 | 2330 | |
57dc9a57 TM |
2331 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2332 | if (data == NULL) | |
2333 | goto out; | |
2334 | ||
2335 | status = nfs4_do_create(dir, dentry, data); | |
2336 | ||
2337 | nfs4_free_createdata(data); | |
2338 | out: | |
1da177e4 LT |
2339 | return status; |
2340 | } | |
2341 | ||
2342 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2343 | struct iattr *sattr) | |
2344 | { | |
2345 | struct nfs4_exception exception = { }; | |
2346 | int err; | |
2347 | do { | |
2348 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2349 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2350 | &exception); | |
2351 | } while (exception.retry); | |
2352 | return err; | |
2353 | } | |
2354 | ||
2355 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2356 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2357 | { | |
2358 | struct inode *dir = dentry->d_inode; | |
2359 | struct nfs4_readdir_arg args = { | |
2360 | .fh = NFS_FH(dir), | |
2361 | .pages = &page, | |
2362 | .pgbase = 0, | |
2363 | .count = count, | |
a65318bf | 2364 | .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, |
1da177e4 LT |
2365 | }; |
2366 | struct nfs4_readdir_res res; | |
2367 | struct rpc_message msg = { | |
2368 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2369 | .rpc_argp = &args, | |
2370 | .rpc_resp = &res, | |
2371 | .rpc_cred = cred, | |
2372 | }; | |
2373 | int status; | |
2374 | ||
3110ff80 | 2375 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2376 | dentry->d_parent->d_name.name, |
2377 | dentry->d_name.name, | |
2378 | (unsigned long long)cookie); | |
1da177e4 LT |
2379 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2380 | res.pgbase = args.pgbase; | |
cccef3b9 | 2381 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2382 | if (status == 0) |
2383 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2384 | |
2385 | nfs_invalidate_atime(dir); | |
2386 | ||
3110ff80 | 2387 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2388 | return status; |
2389 | } | |
2390 | ||
2391 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2392 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2393 | { | |
2394 | struct nfs4_exception exception = { }; | |
2395 | int err; | |
2396 | do { | |
2397 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2398 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2399 | page, count, plus), | |
2400 | &exception); | |
2401 | } while (exception.retry); | |
2402 | return err; | |
2403 | } | |
2404 | ||
2405 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2406 | struct iattr *sattr, dev_t rdev) | |
2407 | { | |
57dc9a57 TM |
2408 | struct nfs4_createdata *data; |
2409 | int mode = sattr->ia_mode; | |
2410 | int status = -ENOMEM; | |
1da177e4 LT |
2411 | |
2412 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2413 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2414 | |
2415 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2416 | if (data == NULL) | |
2417 | goto out; | |
2418 | ||
1da177e4 | 2419 | if (S_ISFIFO(mode)) |
57dc9a57 | 2420 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2421 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2422 | data->arg.ftype = NF4BLK; |
2423 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2424 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2425 | } |
2426 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2427 | data->arg.ftype = NF4CHR; |
2428 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2429 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2430 | } |
1da177e4 | 2431 | |
57dc9a57 TM |
2432 | status = nfs4_do_create(dir, dentry, data); |
2433 | ||
2434 | nfs4_free_createdata(data); | |
2435 | out: | |
1da177e4 LT |
2436 | return status; |
2437 | } | |
2438 | ||
2439 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2440 | struct iattr *sattr, dev_t rdev) | |
2441 | { | |
2442 | struct nfs4_exception exception = { }; | |
2443 | int err; | |
2444 | do { | |
2445 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2446 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2447 | &exception); | |
2448 | } while (exception.retry); | |
2449 | return err; | |
2450 | } | |
2451 | ||
2452 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2453 | struct nfs_fsstat *fsstat) | |
2454 | { | |
2455 | struct nfs4_statfs_arg args = { | |
2456 | .fh = fhandle, | |
2457 | .bitmask = server->attr_bitmask, | |
2458 | }; | |
24ad148a BH |
2459 | struct nfs4_statfs_res res = { |
2460 | .fsstat = fsstat, | |
2461 | }; | |
1da177e4 LT |
2462 | struct rpc_message msg = { |
2463 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2464 | .rpc_argp = &args, | |
24ad148a | 2465 | .rpc_resp = &res, |
1da177e4 LT |
2466 | }; |
2467 | ||
0e574af1 | 2468 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2469 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2470 | } |
2471 | ||
2472 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2473 | { | |
2474 | struct nfs4_exception exception = { }; | |
2475 | int err; | |
2476 | do { | |
2477 | err = nfs4_handle_exception(server, | |
2478 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2479 | &exception); | |
2480 | } while (exception.retry); | |
2481 | return err; | |
2482 | } | |
2483 | ||
2484 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2485 | struct nfs_fsinfo *fsinfo) | |
2486 | { | |
2487 | struct nfs4_fsinfo_arg args = { | |
2488 | .fh = fhandle, | |
2489 | .bitmask = server->attr_bitmask, | |
2490 | }; | |
3dda5e43 BH |
2491 | struct nfs4_fsinfo_res res = { |
2492 | .fsinfo = fsinfo, | |
2493 | }; | |
1da177e4 LT |
2494 | struct rpc_message msg = { |
2495 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2496 | .rpc_argp = &args, | |
3dda5e43 | 2497 | .rpc_resp = &res, |
1da177e4 LT |
2498 | }; |
2499 | ||
cccef3b9 | 2500 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2501 | } |
2502 | ||
2503 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2504 | { | |
2505 | struct nfs4_exception exception = { }; | |
2506 | int err; | |
2507 | ||
2508 | do { | |
2509 | err = nfs4_handle_exception(server, | |
2510 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2511 | &exception); | |
2512 | } while (exception.retry); | |
2513 | return err; | |
2514 | } | |
2515 | ||
2516 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2517 | { | |
0e574af1 | 2518 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2519 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2520 | } | |
2521 | ||
2522 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2523 | struct nfs_pathconf *pathconf) | |
2524 | { | |
2525 | struct nfs4_pathconf_arg args = { | |
2526 | .fh = fhandle, | |
2527 | .bitmask = server->attr_bitmask, | |
2528 | }; | |
d45b2989 BH |
2529 | struct nfs4_pathconf_res res = { |
2530 | .pathconf = pathconf, | |
2531 | }; | |
1da177e4 LT |
2532 | struct rpc_message msg = { |
2533 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2534 | .rpc_argp = &args, | |
d45b2989 | 2535 | .rpc_resp = &res, |
1da177e4 LT |
2536 | }; |
2537 | ||
2538 | /* None of the pathconf attributes are mandatory to implement */ | |
2539 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2540 | memset(pathconf, 0, sizeof(*pathconf)); | |
2541 | return 0; | |
2542 | } | |
2543 | ||
0e574af1 | 2544 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 2545 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2546 | } |
2547 | ||
2548 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2549 | struct nfs_pathconf *pathconf) | |
2550 | { | |
2551 | struct nfs4_exception exception = { }; | |
2552 | int err; | |
2553 | ||
2554 | do { | |
2555 | err = nfs4_handle_exception(server, | |
2556 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2557 | &exception); | |
2558 | } while (exception.retry); | |
2559 | return err; | |
2560 | } | |
2561 | ||
ec06c096 | 2562 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2563 | { |
ec06c096 | 2564 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2565 | |
9e33bed5 | 2566 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
1da177e4 | 2567 | rpc_restart_call(task); |
ec06c096 | 2568 | return -EAGAIN; |
1da177e4 | 2569 | } |
8850df99 TM |
2570 | |
2571 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 2572 | if (task->tk_status > 0) |
ec06c096 TM |
2573 | renew_lease(server, data->timestamp); |
2574 | return 0; | |
1da177e4 LT |
2575 | } |
2576 | ||
bdc7f021 | 2577 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 2578 | { |
1da177e4 | 2579 | data->timestamp = jiffies; |
bdc7f021 | 2580 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
2581 | } |
2582 | ||
788e7a89 | 2583 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2584 | { |
1da177e4 LT |
2585 | struct inode *inode = data->inode; |
2586 | ||
9e33bed5 | 2587 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
1da177e4 | 2588 | rpc_restart_call(task); |
788e7a89 | 2589 | return -EAGAIN; |
1da177e4 | 2590 | } |
4f9838c7 | 2591 | if (task->tk_status >= 0) { |
1da177e4 | 2592 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 2593 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 2594 | } |
788e7a89 | 2595 | return 0; |
1da177e4 LT |
2596 | } |
2597 | ||
bdc7f021 | 2598 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2599 | { |
bdc7f021 TM |
2600 | struct nfs_server *server = NFS_SERVER(data->inode); |
2601 | ||
a65318bf | 2602 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2603 | data->res.server = server; |
1da177e4 LT |
2604 | data->timestamp = jiffies; |
2605 | ||
bdc7f021 | 2606 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
2607 | } |
2608 | ||
788e7a89 | 2609 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2610 | { |
1da177e4 LT |
2611 | struct inode *inode = data->inode; |
2612 | ||
9e33bed5 | 2613 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
1da177e4 | 2614 | rpc_restart_call(task); |
788e7a89 | 2615 | return -EAGAIN; |
1da177e4 | 2616 | } |
9e08a3c5 | 2617 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 2618 | return 0; |
1da177e4 LT |
2619 | } |
2620 | ||
bdc7f021 | 2621 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2622 | { |
788e7a89 | 2623 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2624 | |
a65318bf | 2625 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2626 | data->res.server = server; |
bdc7f021 | 2627 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
2628 | } |
2629 | ||
2630 | /* | |
2631 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2632 | * standalone procedure for queueing an asynchronous RENEW. | |
2633 | */ | |
963d8fe5 | 2634 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2635 | { |
adfa6f98 | 2636 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2637 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2638 | |
2639 | if (task->tk_status < 0) { | |
95baa25c TM |
2640 | /* Unless we're shutting down, schedule state recovery! */ |
2641 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
2642 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
2643 | return; |
2644 | } | |
2645 | spin_lock(&clp->cl_lock); | |
2646 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2647 | clp->cl_last_renewal = timestamp; | |
2648 | spin_unlock(&clp->cl_lock); | |
2649 | } | |
2650 | ||
963d8fe5 TM |
2651 | static const struct rpc_call_ops nfs4_renew_ops = { |
2652 | .rpc_call_done = nfs4_renew_done, | |
2653 | }; | |
2654 | ||
adfa6f98 | 2655 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2656 | { |
2657 | struct rpc_message msg = { | |
2658 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2659 | .rpc_argp = clp, | |
b4454fe1 | 2660 | .rpc_cred = cred, |
1da177e4 LT |
2661 | }; |
2662 | ||
2663 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2664 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2665 | } |
2666 | ||
adfa6f98 | 2667 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2668 | { |
2669 | struct rpc_message msg = { | |
2670 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2671 | .rpc_argp = clp, | |
b4454fe1 | 2672 | .rpc_cred = cred, |
1da177e4 LT |
2673 | }; |
2674 | unsigned long now = jiffies; | |
2675 | int status; | |
2676 | ||
2677 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2678 | if (status < 0) | |
2679 | return status; | |
2680 | spin_lock(&clp->cl_lock); | |
2681 | if (time_before(clp->cl_last_renewal,now)) | |
2682 | clp->cl_last_renewal = now; | |
2683 | spin_unlock(&clp->cl_lock); | |
2684 | return 0; | |
2685 | } | |
2686 | ||
aa1870af BF |
2687 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2688 | { | |
2689 | return (server->caps & NFS_CAP_ACLS) | |
2690 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2691 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2692 | } | |
2693 | ||
2694 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2695 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2696 | * the stack. | |
2697 | */ | |
2698 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2699 | ||
2700 | static void buf_to_pages(const void *buf, size_t buflen, | |
2701 | struct page **pages, unsigned int *pgbase) | |
2702 | { | |
2703 | const void *p = buf; | |
2704 | ||
2705 | *pgbase = offset_in_page(buf); | |
2706 | p -= *pgbase; | |
2707 | while (p < buf + buflen) { | |
2708 | *(pages++) = virt_to_page(p); | |
2709 | p += PAGE_CACHE_SIZE; | |
2710 | } | |
2711 | } | |
2712 | ||
e50a1c2e BF |
2713 | struct nfs4_cached_acl { |
2714 | int cached; | |
2715 | size_t len; | |
3e9d4154 | 2716 | char data[0]; |
e50a1c2e BF |
2717 | }; |
2718 | ||
2719 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2720 | { | |
2721 | struct nfs_inode *nfsi = NFS_I(inode); | |
2722 | ||
2723 | spin_lock(&inode->i_lock); | |
2724 | kfree(nfsi->nfs4_acl); | |
2725 | nfsi->nfs4_acl = acl; | |
2726 | spin_unlock(&inode->i_lock); | |
2727 | } | |
2728 | ||
2729 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2730 | { | |
2731 | nfs4_set_cached_acl(inode, NULL); | |
2732 | } | |
2733 | ||
2734 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2735 | { | |
2736 | struct nfs_inode *nfsi = NFS_I(inode); | |
2737 | struct nfs4_cached_acl *acl; | |
2738 | int ret = -ENOENT; | |
2739 | ||
2740 | spin_lock(&inode->i_lock); | |
2741 | acl = nfsi->nfs4_acl; | |
2742 | if (acl == NULL) | |
2743 | goto out; | |
2744 | if (buf == NULL) /* user is just asking for length */ | |
2745 | goto out_len; | |
2746 | if (acl->cached == 0) | |
2747 | goto out; | |
2748 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2749 | if (acl->len > buflen) | |
2750 | goto out; | |
2751 | memcpy(buf, acl->data, acl->len); | |
2752 | out_len: | |
2753 | ret = acl->len; | |
2754 | out: | |
2755 | spin_unlock(&inode->i_lock); | |
2756 | return ret; | |
2757 | } | |
2758 | ||
2759 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2760 | { | |
2761 | struct nfs4_cached_acl *acl; | |
2762 | ||
2763 | if (buf && acl_len <= PAGE_SIZE) { | |
2764 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2765 | if (acl == NULL) | |
2766 | goto out; | |
2767 | acl->cached = 1; | |
2768 | memcpy(acl->data, buf, acl_len); | |
2769 | } else { | |
2770 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2771 | if (acl == NULL) | |
2772 | goto out; | |
2773 | acl->cached = 0; | |
2774 | } | |
2775 | acl->len = acl_len; | |
2776 | out: | |
2777 | nfs4_set_cached_acl(inode, acl); | |
2778 | } | |
2779 | ||
16b4289c | 2780 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 2781 | { |
aa1870af BF |
2782 | struct page *pages[NFS4ACL_MAXPAGES]; |
2783 | struct nfs_getaclargs args = { | |
2784 | .fh = NFS_FH(inode), | |
2785 | .acl_pages = pages, | |
2786 | .acl_len = buflen, | |
2787 | }; | |
663c79b3 BH |
2788 | struct nfs_getaclres res = { |
2789 | .acl_len = buflen, | |
2790 | }; | |
e50a1c2e | 2791 | void *resp_buf; |
aa1870af BF |
2792 | struct rpc_message msg = { |
2793 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2794 | .rpc_argp = &args, | |
663c79b3 | 2795 | .rpc_resp = &res, |
aa1870af | 2796 | }; |
e50a1c2e | 2797 | struct page *localpage = NULL; |
aa1870af BF |
2798 | int ret; |
2799 | ||
e50a1c2e BF |
2800 | if (buflen < PAGE_SIZE) { |
2801 | /* As long as we're doing a round trip to the server anyway, | |
2802 | * let's be prepared for a page of acl data. */ | |
2803 | localpage = alloc_page(GFP_KERNEL); | |
2804 | resp_buf = page_address(localpage); | |
2805 | if (localpage == NULL) | |
2806 | return -ENOMEM; | |
2807 | args.acl_pages[0] = localpage; | |
2808 | args.acl_pgbase = 0; | |
663c79b3 | 2809 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2810 | } else { |
2811 | resp_buf = buf; | |
2812 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2813 | } | |
cccef3b9 | 2814 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
2815 | if (ret) |
2816 | goto out_free; | |
663c79b3 BH |
2817 | if (res.acl_len > args.acl_len) |
2818 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 2819 | else |
663c79b3 | 2820 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
2821 | if (buf) { |
2822 | ret = -ERANGE; | |
663c79b3 | 2823 | if (res.acl_len > buflen) |
e50a1c2e BF |
2824 | goto out_free; |
2825 | if (localpage) | |
663c79b3 | 2826 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 2827 | } |
663c79b3 | 2828 | ret = res.acl_len; |
e50a1c2e BF |
2829 | out_free: |
2830 | if (localpage) | |
2831 | __free_page(localpage); | |
aa1870af BF |
2832 | return ret; |
2833 | } | |
2834 | ||
16b4289c TM |
2835 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
2836 | { | |
2837 | struct nfs4_exception exception = { }; | |
2838 | ssize_t ret; | |
2839 | do { | |
2840 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
2841 | if (ret >= 0) | |
2842 | break; | |
2843 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
2844 | } while (exception.retry); | |
2845 | return ret; | |
2846 | } | |
2847 | ||
e50a1c2e BF |
2848 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2849 | { | |
2850 | struct nfs_server *server = NFS_SERVER(inode); | |
2851 | int ret; | |
2852 | ||
2853 | if (!nfs4_server_supports_acls(server)) | |
2854 | return -EOPNOTSUPP; | |
2855 | ret = nfs_revalidate_inode(server, inode); | |
2856 | if (ret < 0) | |
2857 | return ret; | |
f41f7418 TM |
2858 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
2859 | nfs_zap_acl_cache(inode); | |
e50a1c2e BF |
2860 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
2861 | if (ret != -ENOENT) | |
2862 | return ret; | |
2863 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2864 | } | |
2865 | ||
16b4289c | 2866 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
2867 | { |
2868 | struct nfs_server *server = NFS_SERVER(inode); | |
2869 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2870 | struct nfs_setaclargs arg = { | |
2871 | .fh = NFS_FH(inode), | |
2872 | .acl_pages = pages, | |
2873 | .acl_len = buflen, | |
2874 | }; | |
73c403a9 | 2875 | struct nfs_setaclres res; |
4b580ee3 BF |
2876 | struct rpc_message msg = { |
2877 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2878 | .rpc_argp = &arg, | |
73c403a9 | 2879 | .rpc_resp = &res, |
4b580ee3 BF |
2880 | }; |
2881 | int ret; | |
2882 | ||
2883 | if (!nfs4_server_supports_acls(server)) | |
2884 | return -EOPNOTSUPP; | |
642ac549 | 2885 | nfs_inode_return_delegation(inode); |
4b580ee3 | 2886 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 2887 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
2888 | nfs_access_zap_cache(inode); |
2889 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
2890 | return ret; |
2891 | } | |
2892 | ||
16b4289c TM |
2893 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2894 | { | |
2895 | struct nfs4_exception exception = { }; | |
2896 | int err; | |
2897 | do { | |
2898 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2899 | __nfs4_proc_set_acl(inode, buf, buflen), | |
2900 | &exception); | |
2901 | } while (exception.retry); | |
2902 | return err; | |
2903 | } | |
2904 | ||
1da177e4 | 2905 | static int |
9e33bed5 | 2906 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 2907 | { |
7539bbab | 2908 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2909 | |
2910 | if (!clp || task->tk_status >= 0) | |
2911 | return 0; | |
2912 | switch(task->tk_status) { | |
9e33bed5 TM |
2913 | case -NFS4ERR_ADMIN_REVOKED: |
2914 | case -NFS4ERR_BAD_STATEID: | |
2915 | case -NFS4ERR_OPENMODE: | |
2916 | if (state == NULL) | |
2917 | break; | |
2918 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1da177e4 LT |
2919 | case -NFS4ERR_STALE_CLIENTID: |
2920 | case -NFS4ERR_STALE_STATEID: | |
2921 | case -NFS4ERR_EXPIRED: | |
5d00837b | 2922 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
1da177e4 | 2923 | nfs4_schedule_state_recovery(clp); |
e005e804 | 2924 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
fda13939 | 2925 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
1da177e4 LT |
2926 | task->tk_status = 0; |
2927 | return -EAGAIN; | |
1da177e4 | 2928 | case -NFS4ERR_DELAY: |
2e96d286 | 2929 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 2930 | case -NFS4ERR_GRACE: |
1da177e4 LT |
2931 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
2932 | task->tk_status = 0; | |
2933 | return -EAGAIN; | |
2934 | case -NFS4ERR_OLD_STATEID: | |
2935 | task->tk_status = 0; | |
2936 | return -EAGAIN; | |
2937 | } | |
2938 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2939 | return 0; | |
2940 | } | |
2941 | ||
adfa6f98 | 2942 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
2943 | { |
2944 | nfs4_verifier sc_verifier; | |
2945 | struct nfs4_setclientid setclientid = { | |
2946 | .sc_verifier = &sc_verifier, | |
2947 | .sc_prog = program, | |
2948 | }; | |
2949 | struct rpc_message msg = { | |
2950 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2951 | .rpc_argp = &setclientid, | |
2952 | .rpc_resp = clp, | |
286d7d6a | 2953 | .rpc_cred = cred, |
1da177e4 | 2954 | }; |
bc4785cd | 2955 | __be32 *p; |
1da177e4 LT |
2956 | int loop = 0; |
2957 | int status; | |
2958 | ||
bc4785cd | 2959 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
2960 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
2961 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2962 | ||
2963 | for(;;) { | |
2964 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 2965 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
2966 | clp->cl_ipaddr, |
2967 | rpc_peeraddr2str(clp->cl_rpcclient, | |
2968 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
2969 | rpc_peeraddr2str(clp->cl_rpcclient, |
2970 | RPC_DISPLAY_PROTO), | |
78ea323b | 2971 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
2972 | clp->cl_id_uniquifier); |
2973 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
2974 | sizeof(setclientid.sc_netid), |
2975 | rpc_peeraddr2str(clp->cl_rpcclient, | |
2976 | RPC_DISPLAY_NETID)); | |
1da177e4 | 2977 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 2978 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
2979 | clp->cl_ipaddr, port >> 8, port & 255); |
2980 | ||
2981 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2982 | if (status != -NFS4ERR_CLID_INUSE) | |
2983 | break; | |
2984 | if (signalled()) | |
2985 | break; | |
2986 | if (loop++ & 1) | |
2987 | ssleep(clp->cl_lease_time + 1); | |
2988 | else | |
2989 | if (++clp->cl_id_uniquifier == 0) | |
2990 | break; | |
2991 | } | |
2992 | return status; | |
2993 | } | |
2994 | ||
adfa6f98 | 2995 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2996 | { |
2997 | struct nfs_fsinfo fsinfo; | |
2998 | struct rpc_message msg = { | |
2999 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3000 | .rpc_argp = clp, | |
3001 | .rpc_resp = &fsinfo, | |
286d7d6a | 3002 | .rpc_cred = cred, |
1da177e4 LT |
3003 | }; |
3004 | unsigned long now; | |
3005 | int status; | |
3006 | ||
3007 | now = jiffies; | |
3008 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3009 | if (status == 0) { | |
3010 | spin_lock(&clp->cl_lock); | |
3011 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3012 | clp->cl_last_renewal = now; | |
3013 | spin_unlock(&clp->cl_lock); | |
3014 | } | |
3015 | return status; | |
3016 | } | |
3017 | ||
adfa6f98 | 3018 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 3019 | { |
77e03677 | 3020 | long timeout = 0; |
51581f3b TM |
3021 | int err; |
3022 | do { | |
3023 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3024 | switch (err) { | |
3025 | case 0: | |
3026 | return err; | |
3027 | case -NFS4ERR_RESOURCE: | |
3028 | /* The IBM lawyers misread another document! */ | |
3029 | case -NFS4ERR_DELAY: | |
3030 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3031 | } | |
3032 | } while (err == 0); | |
3033 | return err; | |
3034 | } | |
3035 | ||
fe650407 TM |
3036 | struct nfs4_delegreturndata { |
3037 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3038 | struct nfs4_delegreturnres res; |
fe650407 TM |
3039 | struct nfs_fh fh; |
3040 | nfs4_stateid stateid; | |
26e976a8 | 3041 | unsigned long timestamp; |
fa178f29 | 3042 | struct nfs_fattr fattr; |
fe650407 TM |
3043 | int rpc_status; |
3044 | }; | |
3045 | ||
fe650407 TM |
3046 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3047 | { | |
3048 | struct nfs4_delegreturndata *data = calldata; | |
3049 | data->rpc_status = task->tk_status; | |
26e976a8 | 3050 | if (data->rpc_status == 0) |
fa178f29 | 3051 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
3052 | } |
3053 | ||
3054 | static void nfs4_delegreturn_release(void *calldata) | |
3055 | { | |
fe650407 TM |
3056 | kfree(calldata); |
3057 | } | |
3058 | ||
c8d149f3 | 3059 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
fe650407 TM |
3060 | .rpc_call_done = nfs4_delegreturn_done, |
3061 | .rpc_release = nfs4_delegreturn_release, | |
3062 | }; | |
3063 | ||
e6f81075 | 3064 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3065 | { |
3066 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3067 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3068 | struct rpc_task *task; |
5138fde0 TM |
3069 | struct rpc_message msg = { |
3070 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3071 | .rpc_cred = cred, | |
3072 | }; | |
c970aa85 TM |
3073 | struct rpc_task_setup task_setup_data = { |
3074 | .rpc_client = server->client, | |
5138fde0 | 3075 | .rpc_message = &msg, |
c970aa85 TM |
3076 | .callback_ops = &nfs4_delegreturn_ops, |
3077 | .flags = RPC_TASK_ASYNC, | |
3078 | }; | |
e6f81075 | 3079 | int status = 0; |
fe650407 TM |
3080 | |
3081 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
3082 | if (data == NULL) | |
3083 | return -ENOMEM; | |
3084 | data->args.fhandle = &data->fh; | |
3085 | data->args.stateid = &data->stateid; | |
fa178f29 | 3086 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3087 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3088 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3089 | data->res.fattr = &data->fattr; |
3090 | data->res.server = server; | |
5138fde0 | 3091 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3092 | data->timestamp = jiffies; |
fe650407 TM |
3093 | data->rpc_status = 0; |
3094 | ||
c970aa85 | 3095 | task_setup_data.callback_data = data; |
5138fde0 TM |
3096 | msg.rpc_argp = &data->args, |
3097 | msg.rpc_resp = &data->res, | |
c970aa85 | 3098 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3099 | if (IS_ERR(task)) |
fe650407 | 3100 | return PTR_ERR(task); |
e6f81075 TM |
3101 | if (!issync) |
3102 | goto out; | |
fe650407 | 3103 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3104 | if (status != 0) |
3105 | goto out; | |
3106 | status = data->rpc_status; | |
3107 | if (status != 0) | |
3108 | goto out; | |
3109 | nfs_refresh_inode(inode, &data->fattr); | |
3110 | out: | |
e6b3c4db | 3111 | rpc_put_task(task); |
fe650407 | 3112 | return status; |
1da177e4 LT |
3113 | } |
3114 | ||
e6f81075 | 3115 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3116 | { |
3117 | struct nfs_server *server = NFS_SERVER(inode); | |
3118 | struct nfs4_exception exception = { }; | |
3119 | int err; | |
3120 | do { | |
e6f81075 | 3121 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3122 | switch (err) { |
3123 | case -NFS4ERR_STALE_STATEID: | |
3124 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3125 | case 0: |
3126 | return 0; | |
3127 | } | |
3128 | err = nfs4_handle_exception(server, err, &exception); | |
3129 | } while (exception.retry); | |
3130 | return err; | |
3131 | } | |
3132 | ||
3133 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3134 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3135 | ||
3136 | /* | |
3137 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3138 | */ | |
3139 | static unsigned long | |
3140 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3141 | { | |
150030b7 | 3142 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3143 | timeout <<= 1; |
3144 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3145 | return NFS4_LOCK_MAXTIMEOUT; | |
3146 | return timeout; | |
3147 | } | |
3148 | ||
1da177e4 LT |
3149 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3150 | { | |
3151 | struct inode *inode = state->inode; | |
3152 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3153 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3154 | struct nfs_lockt_args arg = { |
1da177e4 | 3155 | .fh = NFS_FH(inode), |
911d1aaf | 3156 | .fl = request, |
1da177e4 | 3157 | }; |
911d1aaf TM |
3158 | struct nfs_lockt_res res = { |
3159 | .denied = request, | |
1da177e4 LT |
3160 | }; |
3161 | struct rpc_message msg = { | |
3162 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3163 | .rpc_argp = &arg, | |
3164 | .rpc_resp = &res, | |
3165 | .rpc_cred = state->owner->so_cred, | |
3166 | }; | |
1da177e4 LT |
3167 | struct nfs4_lock_state *lsp; |
3168 | int status; | |
3169 | ||
911d1aaf | 3170 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3171 | status = nfs4_set_lock_state(state, request); |
3172 | if (status != 0) | |
3173 | goto out; | |
3174 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3175 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3176 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3177 | switch (status) { |
3178 | case 0: | |
3179 | request->fl_type = F_UNLCK; | |
3180 | break; | |
3181 | case -NFS4ERR_DENIED: | |
3182 | status = 0; | |
1da177e4 | 3183 | } |
70cc6487 | 3184 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3185 | out: |
1da177e4 LT |
3186 | return status; |
3187 | } | |
3188 | ||
3189 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3190 | { | |
3191 | struct nfs4_exception exception = { }; | |
3192 | int err; | |
3193 | ||
3194 | do { | |
3195 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3196 | _nfs4_proc_getlk(state, cmd, request), | |
3197 | &exception); | |
3198 | } while (exception.retry); | |
3199 | return err; | |
3200 | } | |
3201 | ||
3202 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3203 | { | |
3204 | int res = 0; | |
3205 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3206 | case FL_POSIX: | |
3207 | res = posix_lock_file_wait(file, fl); | |
3208 | break; | |
3209 | case FL_FLOCK: | |
3210 | res = flock_lock_file_wait(file, fl); | |
3211 | break; | |
3212 | default: | |
3213 | BUG(); | |
3214 | } | |
1da177e4 LT |
3215 | return res; |
3216 | } | |
3217 | ||
faf5f49c | 3218 | struct nfs4_unlockdata { |
911d1aaf TM |
3219 | struct nfs_locku_args arg; |
3220 | struct nfs_locku_res res; | |
faf5f49c TM |
3221 | struct nfs4_lock_state *lsp; |
3222 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3223 | struct file_lock fl; |
3224 | const struct nfs_server *server; | |
26e976a8 | 3225 | unsigned long timestamp; |
faf5f49c TM |
3226 | }; |
3227 | ||
911d1aaf TM |
3228 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3229 | struct nfs_open_context *ctx, | |
3230 | struct nfs4_lock_state *lsp, | |
3231 | struct nfs_seqid *seqid) | |
3232 | { | |
3233 | struct nfs4_unlockdata *p; | |
3234 | struct inode *inode = lsp->ls_state->inode; | |
3235 | ||
3236 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3237 | if (p == NULL) | |
3238 | return NULL; | |
3239 | p->arg.fh = NFS_FH(inode); | |
3240 | p->arg.fl = &p->fl; | |
3241 | p->arg.seqid = seqid; | |
c1d51931 | 3242 | p->res.seqid = seqid; |
911d1aaf TM |
3243 | p->arg.stateid = &lsp->ls_stateid; |
3244 | p->lsp = lsp; | |
3245 | atomic_inc(&lsp->ls_count); | |
3246 | /* Ensure we don't close file until we're done freeing locks! */ | |
3247 | p->ctx = get_nfs_open_context(ctx); | |
3248 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3249 | p->server = NFS_SERVER(inode); | |
3250 | return p; | |
3251 | } | |
3252 | ||
06f814a3 | 3253 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3254 | { |
963d8fe5 | 3255 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3256 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3257 | nfs4_put_lock_state(calldata->lsp); |
3258 | put_nfs_open_context(calldata->ctx); | |
3259 | kfree(calldata); | |
faf5f49c TM |
3260 | } |
3261 | ||
963d8fe5 | 3262 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3263 | { |
963d8fe5 | 3264 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3265 | |
06f814a3 TM |
3266 | if (RPC_ASSASSINATED(task)) |
3267 | return; | |
faf5f49c TM |
3268 | switch (task->tk_status) { |
3269 | case 0: | |
3270 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3271 | calldata->res.stateid.data, |
faf5f49c | 3272 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3273 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3274 | break; |
9e33bed5 TM |
3275 | case -NFS4ERR_BAD_STATEID: |
3276 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3277 | case -NFS4ERR_STALE_STATEID: |
3278 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3279 | break; |
3280 | default: | |
9e33bed5 | 3281 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
faf5f49c | 3282 | rpc_restart_call(task); |
faf5f49c | 3283 | } |
faf5f49c TM |
3284 | } |
3285 | ||
4ce70ada | 3286 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3287 | { |
4ce70ada | 3288 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3289 | |
911d1aaf | 3290 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3291 | return; |
3292 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3293 | /* Note: exit _without_ running nfs4_locku_done */ |
3294 | task->tk_action = NULL; | |
faf5f49c TM |
3295 | return; |
3296 | } | |
26e976a8 | 3297 | calldata->timestamp = jiffies; |
5138fde0 | 3298 | rpc_call_start(task); |
faf5f49c TM |
3299 | } |
3300 | ||
963d8fe5 | 3301 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3302 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3303 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3304 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3305 | }; |
3306 | ||
a5d16a4d TM |
3307 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3308 | struct nfs_open_context *ctx, | |
3309 | struct nfs4_lock_state *lsp, | |
3310 | struct nfs_seqid *seqid) | |
3311 | { | |
3312 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3313 | struct rpc_message msg = { |
3314 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3315 | .rpc_cred = ctx->cred, | |
3316 | }; | |
c970aa85 TM |
3317 | struct rpc_task_setup task_setup_data = { |
3318 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3319 | .rpc_message = &msg, |
c970aa85 | 3320 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3321 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3322 | .flags = RPC_TASK_ASYNC, |
3323 | }; | |
a5d16a4d | 3324 | |
137d6aca FF |
3325 | /* Ensure this is an unlock - when canceling a lock, the |
3326 | * canceled lock is passed in, and it won't be an unlock. | |
3327 | */ | |
3328 | fl->fl_type = F_UNLCK; | |
3329 | ||
a5d16a4d TM |
3330 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3331 | if (data == NULL) { | |
3332 | nfs_free_seqid(seqid); | |
3333 | return ERR_PTR(-ENOMEM); | |
3334 | } | |
3335 | ||
5138fde0 TM |
3336 | msg.rpc_argp = &data->arg, |
3337 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3338 | task_setup_data.callback_data = data; |
3339 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3340 | } |
3341 | ||
faf5f49c TM |
3342 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3343 | { | |
19e03c57 | 3344 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3345 | struct nfs_seqid *seqid; |
1da177e4 | 3346 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3347 | struct rpc_task *task; |
3348 | int status = 0; | |
536ff0f8 | 3349 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3350 | |
8d0a8a9d | 3351 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3352 | /* Unlock _before_ we do the RPC call */ |
3353 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3354 | down_read(&nfsi->rwsem); |
3355 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3356 | up_read(&nfsi->rwsem); | |
9b073574 | 3357 | goto out; |
19e03c57 TM |
3358 | } |
3359 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3360 | if (status != 0) |
9b073574 TM |
3361 | goto out; |
3362 | /* Is this a delegated lock? */ | |
3363 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3364 | goto out; | |
8d0a8a9d | 3365 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3366 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3367 | status = -ENOMEM; |
911d1aaf | 3368 | if (seqid == NULL) |
9b073574 | 3369 | goto out; |
cd3758e3 | 3370 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3371 | status = PTR_ERR(task); |
3372 | if (IS_ERR(task)) | |
9b073574 | 3373 | goto out; |
a5d16a4d | 3374 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3375 | rpc_put_task(task); |
9b073574 | 3376 | out: |
536ff0f8 | 3377 | request->fl_flags = fl_flags; |
1da177e4 LT |
3378 | return status; |
3379 | } | |
3380 | ||
a5d16a4d TM |
3381 | struct nfs4_lockdata { |
3382 | struct nfs_lock_args arg; | |
3383 | struct nfs_lock_res res; | |
3384 | struct nfs4_lock_state *lsp; | |
3385 | struct nfs_open_context *ctx; | |
3386 | struct file_lock fl; | |
26e976a8 | 3387 | unsigned long timestamp; |
a5d16a4d TM |
3388 | int rpc_status; |
3389 | int cancelled; | |
3390 | }; | |
3391 | ||
3392 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3393 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3394 | { |
a5d16a4d TM |
3395 | struct nfs4_lockdata *p; |
3396 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3397 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3398 | |
3399 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3400 | if (p == NULL) | |
3401 | return NULL; | |
3402 | ||
3403 | p->arg.fh = NFS_FH(inode); | |
3404 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
3405 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
3406 | if (p->arg.open_seqid == NULL) | |
3407 | goto out_free; | |
a5d16a4d TM |
3408 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3409 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 3410 | goto out_free_seqid; |
a5d16a4d | 3411 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3412 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3413 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3414 | p->res.lock_seqid = p->arg.lock_seqid; |
a5d16a4d TM |
3415 | p->lsp = lsp; |
3416 | atomic_inc(&lsp->ls_count); | |
3417 | p->ctx = get_nfs_open_context(ctx); | |
3418 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3419 | return p; | |
2f74c0a0 TM |
3420 | out_free_seqid: |
3421 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3422 | out_free: |
3423 | kfree(p); | |
3424 | return NULL; | |
3425 | } | |
3426 | ||
3427 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3428 | { | |
3429 | struct nfs4_lockdata *data = calldata; | |
3430 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3431 | |
3110ff80 | 3432 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3433 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3434 | return; | |
a5d16a4d TM |
3435 | /* Do we need to do an open_to_lock_owner? */ |
3436 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3437 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3438 | return; | |
a5d16a4d TM |
3439 | data->arg.open_stateid = &state->stateid; |
3440 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3441 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3442 | } else |
3443 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3444 | data->timestamp = jiffies; |
5138fde0 | 3445 | rpc_call_start(task); |
3110ff80 | 3446 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3447 | } |
3448 | ||
3449 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3450 | { | |
3451 | struct nfs4_lockdata *data = calldata; | |
3452 | ||
3110ff80 | 3453 | dprintk("%s: begin!\n", __func__); |
a5d16a4d TM |
3454 | |
3455 | data->rpc_status = task->tk_status; | |
3456 | if (RPC_ASSASSINATED(task)) | |
3457 | goto out; | |
3458 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
3459 | if (data->rpc_status == 0) |
3460 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3461 | else | |
3462 | goto out; | |
3463 | } | |
3464 | if (data->rpc_status == 0) { | |
3465 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3466 | sizeof(data->lsp->ls_stateid.data)); | |
3467 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3468 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 3469 | } |
a5d16a4d | 3470 | out: |
3110ff80 | 3471 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
3472 | } |
3473 | ||
3474 | static void nfs4_lock_release(void *calldata) | |
3475 | { | |
3476 | struct nfs4_lockdata *data = calldata; | |
3477 | ||
3110ff80 | 3478 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 3479 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
3480 | if (data->cancelled != 0) { |
3481 | struct rpc_task *task; | |
3482 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3483 | data->arg.lock_seqid); | |
3484 | if (!IS_ERR(task)) | |
e6b3c4db | 3485 | rpc_put_task(task); |
3110ff80 | 3486 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
3487 | } else |
3488 | nfs_free_seqid(data->arg.lock_seqid); | |
3489 | nfs4_put_lock_state(data->lsp); | |
3490 | put_nfs_open_context(data->ctx); | |
3491 | kfree(data); | |
3110ff80 | 3492 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
3493 | } |
3494 | ||
3495 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3496 | .rpc_call_prepare = nfs4_lock_prepare, | |
3497 | .rpc_call_done = nfs4_lock_done, | |
3498 | .rpc_release = nfs4_lock_release, | |
3499 | }; | |
3500 | ||
3501 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3502 | { | |
3503 | struct nfs4_lockdata *data; | |
3504 | struct rpc_task *task; | |
5138fde0 TM |
3505 | struct rpc_message msg = { |
3506 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3507 | .rpc_cred = state->owner->so_cred, | |
3508 | }; | |
c970aa85 TM |
3509 | struct rpc_task_setup task_setup_data = { |
3510 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 3511 | .rpc_message = &msg, |
c970aa85 | 3512 | .callback_ops = &nfs4_lock_ops, |
101070ca | 3513 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3514 | .flags = RPC_TASK_ASYNC, |
3515 | }; | |
a5d16a4d TM |
3516 | int ret; |
3517 | ||
3110ff80 | 3518 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 3519 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
3520 | fl->fl_u.nfs4_fl.owner); |
3521 | if (data == NULL) | |
3522 | return -ENOMEM; | |
3523 | if (IS_SETLKW(cmd)) | |
3524 | data->arg.block = 1; | |
3525 | if (reclaim != 0) | |
3526 | data->arg.reclaim = 1; | |
5138fde0 TM |
3527 | msg.rpc_argp = &data->arg, |
3528 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3529 | task_setup_data.callback_data = data; |
3530 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 3531 | if (IS_ERR(task)) |
a5d16a4d | 3532 | return PTR_ERR(task); |
a5d16a4d TM |
3533 | ret = nfs4_wait_for_completion_rpc_task(task); |
3534 | if (ret == 0) { | |
3535 | ret = data->rpc_status; | |
3536 | if (ret == -NFS4ERR_DENIED) | |
3537 | ret = -EAGAIN; | |
3538 | } else | |
3539 | data->cancelled = 1; | |
e6b3c4db | 3540 | rpc_put_task(task); |
3110ff80 | 3541 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 3542 | return ret; |
1da177e4 LT |
3543 | } |
3544 | ||
3545 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3546 | { | |
202b50dc TM |
3547 | struct nfs_server *server = NFS_SERVER(state->inode); |
3548 | struct nfs4_exception exception = { }; | |
3549 | int err; | |
3550 | ||
3551 | do { | |
42a2d13e TM |
3552 | /* Cache the lock if possible... */ |
3553 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3554 | return 0; | |
202b50dc TM |
3555 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3556 | if (err != -NFS4ERR_DELAY) | |
3557 | break; | |
3558 | nfs4_handle_exception(server, err, &exception); | |
3559 | } while (exception.retry); | |
3560 | return err; | |
1da177e4 LT |
3561 | } |
3562 | ||
3563 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3564 | { | |
202b50dc TM |
3565 | struct nfs_server *server = NFS_SERVER(state->inode); |
3566 | struct nfs4_exception exception = { }; | |
3567 | int err; | |
3568 | ||
6bfc93ef TM |
3569 | err = nfs4_set_lock_state(state, request); |
3570 | if (err != 0) | |
3571 | return err; | |
202b50dc | 3572 | do { |
42a2d13e TM |
3573 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3574 | return 0; | |
202b50dc TM |
3575 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3576 | if (err != -NFS4ERR_DELAY) | |
3577 | break; | |
3578 | nfs4_handle_exception(server, err, &exception); | |
3579 | } while (exception.retry); | |
3580 | return err; | |
1da177e4 LT |
3581 | } |
3582 | ||
3583 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3584 | { | |
19e03c57 | 3585 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 3586 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3587 | int status; |
3588 | ||
6bfc93ef | 3589 | /* Is this a delegated open? */ |
6bfc93ef TM |
3590 | status = nfs4_set_lock_state(state, request); |
3591 | if (status != 0) | |
3592 | goto out; | |
01c3b861 TM |
3593 | request->fl_flags |= FL_ACCESS; |
3594 | status = do_vfs_lock(request->fl_file, request); | |
3595 | if (status < 0) | |
3596 | goto out; | |
19e03c57 | 3597 | down_read(&nfsi->rwsem); |
01c3b861 | 3598 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 3599 | /* Yes: cache locks! */ |
01c3b861 | 3600 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
3601 | request->fl_flags = fl_flags & ~FL_SLEEP; |
3602 | status = do_vfs_lock(request->fl_file, request); | |
3603 | goto out_unlock; | |
01c3b861 | 3604 | } |
6bfc93ef TM |
3605 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3606 | if (status != 0) | |
01c3b861 | 3607 | goto out_unlock; |
6bfc93ef | 3608 | /* Note: we always want to sleep here! */ |
01c3b861 | 3609 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 3610 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 3611 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 3612 | out_unlock: |
19e03c57 | 3613 | up_read(&nfsi->rwsem); |
01c3b861 TM |
3614 | out: |
3615 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3616 | return status; |
3617 | } | |
3618 | ||
3619 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3620 | { | |
3621 | struct nfs4_exception exception = { }; | |
3622 | int err; | |
3623 | ||
3624 | do { | |
3625 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3626 | _nfs4_proc_setlk(state, cmd, request), | |
3627 | &exception); | |
3628 | } while (exception.retry); | |
3629 | return err; | |
3630 | } | |
3631 | ||
3632 | static int | |
3633 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3634 | { | |
3635 | struct nfs_open_context *ctx; | |
3636 | struct nfs4_state *state; | |
3637 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3638 | int status; | |
3639 | ||
3640 | /* verify open state */ | |
cd3758e3 | 3641 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
3642 | state = ctx->state; |
3643 | ||
3644 | if (request->fl_start < 0 || request->fl_end < 0) | |
3645 | return -EINVAL; | |
3646 | ||
3647 | if (IS_GETLK(cmd)) | |
3648 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3649 | ||
3650 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3651 | return -EINVAL; | |
3652 | ||
3653 | if (request->fl_type == F_UNLCK) | |
3654 | return nfs4_proc_unlck(state, cmd, request); | |
3655 | ||
3656 | do { | |
3657 | status = nfs4_proc_setlk(state, cmd, request); | |
3658 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3659 | break; | |
3660 | timeout = nfs4_set_lock_task_retry(timeout); | |
3661 | status = -ERESTARTSYS; | |
3662 | if (signalled()) | |
3663 | break; | |
3664 | } while(status < 0); | |
1da177e4 LT |
3665 | return status; |
3666 | } | |
3667 | ||
888e694c TM |
3668 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3669 | { | |
3670 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3671 | struct nfs4_exception exception = { }; | |
3672 | int err; | |
3673 | ||
3674 | err = nfs4_set_lock_state(state, fl); | |
3675 | if (err != 0) | |
3676 | goto out; | |
3677 | do { | |
3678 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3679 | if (err != -NFS4ERR_DELAY) | |
3680 | break; | |
3681 | err = nfs4_handle_exception(server, err, &exception); | |
3682 | } while (exception.retry); | |
3683 | out: | |
3684 | return err; | |
3685 | } | |
6b3b5496 | 3686 | |
aa1870af BF |
3687 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3688 | ||
6b3b5496 BF |
3689 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3690 | size_t buflen, int flags) | |
3691 | { | |
4b580ee3 BF |
3692 | struct inode *inode = dentry->d_inode; |
3693 | ||
3694 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3695 | return -EOPNOTSUPP; | |
3696 | ||
4b580ee3 | 3697 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
3698 | } |
3699 | ||
3700 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3701 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3702 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3703 | * attributes in kernel-managed attribute namespaces. */ | |
3704 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3705 | size_t buflen) | |
3706 | { | |
aa1870af BF |
3707 | struct inode *inode = dentry->d_inode; |
3708 | ||
3709 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3710 | return -EOPNOTSUPP; | |
3711 | ||
3712 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3713 | } |
3714 | ||
3715 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3716 | { | |
aa1870af | 3717 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 3718 | |
096455a2 BF |
3719 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
3720 | return 0; | |
6b3b5496 BF |
3721 | if (buf && buflen < len) |
3722 | return -ERANGE; | |
3723 | if (buf) | |
aa1870af BF |
3724 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3725 | return len; | |
6b3b5496 BF |
3726 | } |
3727 | ||
69aaaae1 TM |
3728 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
3729 | { | |
3730 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
3731 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
3732 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
3733 | return; | |
3734 | ||
3735 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
3736 | NFS_ATTR_FATTR_NLINK; | |
3737 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
3738 | fattr->nlink = 2; | |
3739 | } | |
3740 | ||
56659e99 | 3741 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 3742 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
3743 | { |
3744 | struct nfs_server *server = NFS_SERVER(dir); | |
3745 | u32 bitmask[2] = { | |
361e624f MN |
3746 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
3747 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
3748 | }; |
3749 | struct nfs4_fs_locations_arg args = { | |
3750 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 3751 | .name = name, |
683b57b4 TM |
3752 | .page = page, |
3753 | .bitmask = bitmask, | |
3754 | }; | |
22958463 BH |
3755 | struct nfs4_fs_locations_res res = { |
3756 | .fs_locations = fs_locations, | |
3757 | }; | |
683b57b4 TM |
3758 | struct rpc_message msg = { |
3759 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3760 | .rpc_argp = &args, | |
22958463 | 3761 | .rpc_resp = &res, |
683b57b4 TM |
3762 | }; |
3763 | int status; | |
3764 | ||
3110ff80 | 3765 | dprintk("%s: start\n", __func__); |
c228fd3a | 3766 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 3767 | fs_locations->server = server; |
830b8e33 | 3768 | fs_locations->nlocations = 0; |
cccef3b9 | 3769 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 3770 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 3771 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
3772 | return status; |
3773 | } | |
3774 | ||
557134a3 AA |
3775 | #ifdef CONFIG_NFS_V4_1 |
3776 | /* Destroy the slot table */ | |
3777 | static void nfs4_destroy_slot_table(struct nfs4_session *session) | |
3778 | { | |
3779 | if (session->fc_slot_table.slots == NULL) | |
3780 | return; | |
3781 | kfree(session->fc_slot_table.slots); | |
3782 | session->fc_slot_table.slots = NULL; | |
3783 | return; | |
3784 | } | |
3785 | ||
3786 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
3787 | { | |
3788 | struct nfs4_session *session; | |
3789 | struct nfs4_slot_table *tbl; | |
3790 | ||
3791 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
3792 | if (!session) | |
3793 | return NULL; | |
3794 | tbl = &session->fc_slot_table; | |
3795 | spin_lock_init(&tbl->slot_tbl_lock); | |
3796 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table"); | |
3797 | session->clp = clp; | |
3798 | return session; | |
3799 | } | |
3800 | ||
3801 | void nfs4_destroy_session(struct nfs4_session *session) | |
3802 | { | |
3803 | nfs4_destroy_slot_table(session); | |
3804 | kfree(session); | |
3805 | } | |
3806 | ||
3807 | #endif /* CONFIG_NFS_V4_1 */ | |
3808 | ||
1da177e4 | 3809 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
7eff03ae | 3810 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 3811 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
3812 | .recover_open = nfs4_open_reclaim, |
3813 | .recover_lock = nfs4_lock_reclaim, | |
3814 | }; | |
3815 | ||
b79a4a1b | 3816 | struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { |
7eff03ae | 3817 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 3818 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
3819 | .recover_open = nfs4_open_expired, |
3820 | .recover_lock = nfs4_lock_expired, | |
3821 | }; | |
3822 | ||
92e1d5be | 3823 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
3824 | .permission = nfs_permission, |
3825 | .getattr = nfs_getattr, | |
3826 | .setattr = nfs_setattr, | |
3827 | .getxattr = nfs4_getxattr, | |
3828 | .setxattr = nfs4_setxattr, | |
3829 | .listxattr = nfs4_listxattr, | |
3830 | }; | |
3831 | ||
509de811 | 3832 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
3833 | .version = 4, /* protocol version */ |
3834 | .dentry_ops = &nfs4_dentry_operations, | |
3835 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3836 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3837 | .getroot = nfs4_proc_get_root, |
3838 | .getattr = nfs4_proc_getattr, | |
3839 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 3840 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
3841 | .lookup = nfs4_proc_lookup, |
3842 | .access = nfs4_proc_access, | |
3843 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
3844 | .create = nfs4_proc_create, |
3845 | .remove = nfs4_proc_remove, | |
3846 | .unlink_setup = nfs4_proc_unlink_setup, | |
3847 | .unlink_done = nfs4_proc_unlink_done, | |
3848 | .rename = nfs4_proc_rename, | |
3849 | .link = nfs4_proc_link, | |
3850 | .symlink = nfs4_proc_symlink, | |
3851 | .mkdir = nfs4_proc_mkdir, | |
3852 | .rmdir = nfs4_proc_remove, | |
3853 | .readdir = nfs4_proc_readdir, | |
3854 | .mknod = nfs4_proc_mknod, | |
3855 | .statfs = nfs4_proc_statfs, | |
3856 | .fsinfo = nfs4_proc_fsinfo, | |
3857 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 3858 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
3859 | .decode_dirent = nfs4_decode_dirent, |
3860 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 3861 | .read_done = nfs4_read_done, |
1da177e4 | 3862 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 3863 | .write_done = nfs4_write_done, |
1da177e4 | 3864 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 3865 | .commit_done = nfs4_commit_done, |
1da177e4 | 3866 | .lock = nfs4_proc_lock, |
e50a1c2e | 3867 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 3868 | .close_context = nfs4_close_context, |
1da177e4 LT |
3869 | }; |
3870 | ||
3871 | /* | |
3872 | * Local variables: | |
3873 | * c-basic-offset: 8 | |
3874 | * End: | |
3875 | */ |