Commit | Line | Data |
---|---|---|
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_bit_killable(void *word) |
197 | { | |
198 | if (fatal_signal_pending(current)) | |
199 | return -ERESTARTSYS; | |
200 | schedule(); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) | |
205 | { | |
206 | int res; | |
207 | ||
208 | might_sleep(); | |
209 | ||
e005e804 | 210 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
65de872e | 211 | nfs4_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
212 | return res; |
213 | } | |
214 | ||
215 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
216 | { | |
217 | int res = 0; | |
218 | ||
219 | might_sleep(); | |
220 | ||
221 | if (*timeout <= 0) | |
222 | *timeout = NFS4_POLL_RETRY_MIN; | |
223 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
224 | *timeout = NFS4_POLL_RETRY_MAX; | |
225 | schedule_timeout_killable(*timeout); | |
226 | if (fatal_signal_pending(current)) | |
227 | res = -ERESTARTSYS; | |
228 | *timeout <<= 1; | |
229 | return res; | |
230 | } | |
231 | ||
232 | /* This is the error handling routine for processes that are allowed | |
233 | * to sleep. | |
234 | */ | |
235 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
236 | { | |
237 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 238 | struct nfs4_state *state = exception->state; |
65de872e TM |
239 | int ret = errorcode; |
240 | ||
241 | exception->retry = 0; | |
242 | switch(errorcode) { | |
243 | case 0: | |
244 | return 0; | |
9e33bed5 TM |
245 | case -NFS4ERR_ADMIN_REVOKED: |
246 | case -NFS4ERR_BAD_STATEID: | |
247 | case -NFS4ERR_OPENMODE: | |
248 | if (state == NULL) | |
249 | break; | |
250 | nfs4_state_mark_reclaim_nograce(clp, state); | |
65de872e TM |
251 | case -NFS4ERR_STALE_CLIENTID: |
252 | case -NFS4ERR_STALE_STATEID: | |
253 | case -NFS4ERR_EXPIRED: | |
254 | nfs4_schedule_state_recovery(clp); | |
255 | ret = nfs4_wait_clnt_recover(clp); | |
256 | if (ret == 0) | |
257 | exception->retry = 1; | |
258 | break; | |
259 | case -NFS4ERR_FILE_OPEN: | |
260 | case -NFS4ERR_GRACE: | |
261 | case -NFS4ERR_DELAY: | |
262 | ret = nfs4_delay(server->client, &exception->timeout); | |
263 | if (ret != 0) | |
264 | break; | |
265 | case -NFS4ERR_OLD_STATEID: | |
266 | exception->retry = 1; | |
267 | } | |
268 | /* We failed to handle the error */ | |
269 | return nfs4_map_errors(ret); | |
270 | } | |
271 | ||
272 | ||
26e976a8 | 273 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 274 | { |
7539bbab | 275 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
276 | spin_lock(&clp->cl_lock); |
277 | if (time_before(clp->cl_last_renewal,timestamp)) | |
278 | clp->cl_last_renewal = timestamp; | |
279 | spin_unlock(&clp->cl_lock); | |
280 | } | |
281 | ||
38478b24 | 282 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 283 | { |
38478b24 | 284 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 285 | |
38478b24 | 286 | spin_lock(&dir->i_lock); |
40d24704 TM |
287 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
288 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 289 | nfs_force_lookup_revalidate(dir); |
40d24704 | 290 | nfsi->change_attr = cinfo->after; |
38478b24 | 291 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
292 | } |
293 | ||
e56e0b78 | 294 | struct nfs4_opendata { |
c6d00e63 | 295 | struct kref kref; |
e56e0b78 TM |
296 | struct nfs_openargs o_arg; |
297 | struct nfs_openres o_res; | |
cdd4e68b TM |
298 | struct nfs_open_confirmargs c_arg; |
299 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
300 | struct nfs_fattr f_attr; |
301 | struct nfs_fattr dir_attr; | |
ad389da7 | 302 | struct path path; |
e56e0b78 TM |
303 | struct dentry *dir; |
304 | struct nfs4_state_owner *owner; | |
aac00a8d | 305 | struct nfs4_state *state; |
e56e0b78 | 306 | struct iattr attrs; |
26e976a8 | 307 | unsigned long timestamp; |
3e309914 | 308 | unsigned int rpc_done : 1; |
24ac23ab TM |
309 | int rpc_status; |
310 | int cancelled; | |
e56e0b78 TM |
311 | }; |
312 | ||
2ced46c2 TM |
313 | |
314 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
315 | { | |
316 | p->o_res.f_attr = &p->f_attr; | |
317 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
318 | p->o_res.seqid = p->o_arg.seqid; |
319 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
320 | p->o_res.server = p->o_arg.server; |
321 | nfs_fattr_init(&p->f_attr); | |
322 | nfs_fattr_init(&p->dir_attr); | |
323 | } | |
324 | ||
ad389da7 | 325 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 326 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
327 | const struct iattr *attrs) |
328 | { | |
ad389da7 | 329 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
330 | struct inode *dir = parent->d_inode; |
331 | struct nfs_server *server = NFS_SERVER(dir); | |
332 | struct nfs4_opendata *p; | |
333 | ||
334 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
335 | if (p == NULL) | |
336 | goto err; | |
337 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
338 | if (p->o_arg.seqid == NULL) | |
339 | goto err_free; | |
ad389da7 TM |
340 | p->path.mnt = mntget(path->mnt); |
341 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
342 | p->dir = parent; |
343 | p->owner = sp; | |
344 | atomic_inc(&sp->so_count); | |
345 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
346 | p->o_arg.open_flags = flags; |
347 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 348 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 349 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 350 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
351 | p->o_arg.server = server; |
352 | p->o_arg.bitmask = server->attr_bitmask; | |
353 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
e56e0b78 TM |
354 | if (flags & O_EXCL) { |
355 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
356 | s[0] = jiffies; | |
357 | s[1] = current->pid; | |
358 | } else if (flags & O_CREAT) { | |
359 | p->o_arg.u.attrs = &p->attrs; | |
360 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
361 | } | |
cdd4e68b TM |
362 | p->c_arg.fh = &p->o_res.fh; |
363 | p->c_arg.stateid = &p->o_res.stateid; | |
364 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 365 | nfs4_init_opendata_res(p); |
c6d00e63 | 366 | kref_init(&p->kref); |
e56e0b78 TM |
367 | return p; |
368 | err_free: | |
369 | kfree(p); | |
370 | err: | |
371 | dput(parent); | |
372 | return NULL; | |
373 | } | |
374 | ||
c6d00e63 | 375 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 376 | { |
c6d00e63 TM |
377 | struct nfs4_opendata *p = container_of(kref, |
378 | struct nfs4_opendata, kref); | |
379 | ||
380 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
381 | if (p->state != NULL) |
382 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
383 | nfs4_put_state_owner(p->owner); |
384 | dput(p->dir); | |
31f31db1 | 385 | path_put(&p->path); |
c6d00e63 TM |
386 | kfree(p); |
387 | } | |
388 | ||
389 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
390 | { | |
391 | if (p != NULL) | |
392 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
393 | } |
394 | ||
06f814a3 TM |
395 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
396 | { | |
06f814a3 TM |
397 | int ret; |
398 | ||
06f814a3 | 399 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
400 | return ret; |
401 | } | |
402 | ||
dc0b027d | 403 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
404 | { |
405 | int ret = 0; | |
dc0b027d TM |
406 | |
407 | if (open_mode & O_EXCL) | |
408 | goto out; | |
409 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 TM |
410 | case FMODE_READ: |
411 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
412 | break; |
413 | case FMODE_WRITE: | |
414 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
415 | break; |
416 | case FMODE_READ|FMODE_WRITE: | |
417 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
418 | } | |
dc0b027d | 419 | out: |
6ee41268 TM |
420 | return ret; |
421 | } | |
422 | ||
dc0b027d | 423 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 424 | { |
dc0b027d | 425 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 426 | return 0; |
15c831bf | 427 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 428 | return 0; |
b7391f44 | 429 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
430 | return 1; |
431 | } | |
432 | ||
dc0b027d | 433 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 434 | { |
dc0b027d | 435 | switch (fmode) { |
e7616923 TM |
436 | case FMODE_WRITE: |
437 | state->n_wronly++; | |
438 | break; | |
439 | case FMODE_READ: | |
440 | state->n_rdonly++; | |
441 | break; | |
442 | case FMODE_READ|FMODE_WRITE: | |
443 | state->n_rdwr++; | |
444 | } | |
dc0b027d | 445 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
446 | } |
447 | ||
dc0b027d | 448 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
449 | { |
450 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
451 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
452 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 453 | switch (fmode) { |
003707c7 TM |
454 | case FMODE_READ: |
455 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
456 | break; | |
457 | case FMODE_WRITE: | |
458 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
459 | break; | |
460 | case FMODE_READ|FMODE_WRITE: | |
461 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
462 | } | |
e7616923 TM |
463 | } |
464 | ||
dc0b027d | 465 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 466 | { |
8bda4e4c | 467 | write_seqlock(&state->seqlock); |
dc0b027d | 468 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 469 | write_sequnlock(&state->seqlock); |
003707c7 TM |
470 | } |
471 | ||
dc0b027d | 472 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 473 | { |
8bda4e4c TM |
474 | /* |
475 | * Protect the call to nfs4_state_set_mode_locked and | |
476 | * serialise the stateid update | |
477 | */ | |
478 | write_seqlock(&state->seqlock); | |
003707c7 TM |
479 | if (deleg_stateid != NULL) { |
480 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
481 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
482 | } | |
483 | if (open_stateid != NULL) | |
dc0b027d | 484 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
485 | write_sequnlock(&state->seqlock); |
486 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 487 | update_open_stateflags(state, fmode); |
ec073428 | 488 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
489 | } |
490 | ||
dc0b027d | 491 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
492 | { |
493 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
494 | struct nfs_delegation *deleg_cur; | |
495 | int ret = 0; | |
496 | ||
dc0b027d | 497 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
498 | |
499 | rcu_read_lock(); | |
500 | deleg_cur = rcu_dereference(nfsi->delegation); | |
501 | if (deleg_cur == NULL) | |
502 | goto no_delegation; | |
503 | ||
504 | spin_lock(&deleg_cur->lock); | |
505 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 506 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
507 | goto no_delegation_unlock; |
508 | ||
509 | if (delegation == NULL) | |
510 | delegation = &deleg_cur->stateid; | |
511 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
512 | goto no_delegation_unlock; | |
513 | ||
b7391f44 | 514 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 515 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
516 | ret = 1; |
517 | no_delegation_unlock: | |
518 | spin_unlock(&deleg_cur->lock); | |
519 | no_delegation: | |
520 | rcu_read_unlock(); | |
521 | ||
522 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 523 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
524 | ret = 1; |
525 | } | |
526 | ||
527 | return ret; | |
528 | } | |
529 | ||
530 | ||
dc0b027d | 531 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
532 | { |
533 | struct nfs_delegation *delegation; | |
534 | ||
535 | rcu_read_lock(); | |
536 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 537 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
538 | rcu_read_unlock(); |
539 | return; | |
540 | } | |
541 | rcu_read_unlock(); | |
542 | nfs_inode_return_delegation(inode); | |
543 | } | |
544 | ||
6ee41268 | 545 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
546 | { |
547 | struct nfs4_state *state = opendata->state; | |
548 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
549 | struct nfs_delegation *delegation; | |
dc0b027d TM |
550 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
551 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
552 | nfs4_stateid stateid; |
553 | int ret = -EAGAIN; | |
554 | ||
aac00a8d | 555 | for (;;) { |
dc0b027d | 556 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 557 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
558 | if (can_open_cached(state, fmode, open_mode)) { |
559 | update_open_stateflags(state, fmode); | |
6ee41268 | 560 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
561 | goto out_return_state; |
562 | } | |
563 | spin_unlock(&state->owner->so_lock); | |
564 | } | |
34310430 TM |
565 | rcu_read_lock(); |
566 | delegation = rcu_dereference(nfsi->delegation); | |
567 | if (delegation == NULL || | |
dc0b027d | 568 | !can_open_delegated(delegation, fmode)) { |
34310430 | 569 | rcu_read_unlock(); |
aac00a8d | 570 | break; |
34310430 | 571 | } |
aac00a8d TM |
572 | /* Save the delegation */ |
573 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
574 | rcu_read_unlock(); | |
af22f94a | 575 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
576 | if (ret != 0) |
577 | goto out; | |
578 | ret = -EAGAIN; | |
34310430 TM |
579 | |
580 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 581 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 582 | goto out_return_state; |
aac00a8d | 583 | } |
aac00a8d TM |
584 | out: |
585 | return ERR_PTR(ret); | |
586 | out_return_state: | |
587 | atomic_inc(&state->count); | |
588 | return state; | |
589 | } | |
590 | ||
24ac23ab TM |
591 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
592 | { | |
593 | struct inode *inode; | |
594 | struct nfs4_state *state = NULL; | |
003707c7 | 595 | struct nfs_delegation *delegation; |
1b370bc2 | 596 | int ret; |
24ac23ab | 597 | |
aac00a8d | 598 | if (!data->rpc_done) { |
6ee41268 | 599 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
600 | goto out; |
601 | } | |
602 | ||
1b370bc2 | 603 | ret = -EAGAIN; |
24ac23ab | 604 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 605 | goto err; |
24ac23ab | 606 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 607 | ret = PTR_ERR(inode); |
03f28e3a | 608 | if (IS_ERR(inode)) |
1b370bc2 TM |
609 | goto err; |
610 | ret = -ENOMEM; | |
24ac23ab TM |
611 | state = nfs4_get_open_state(inode, data->owner); |
612 | if (state == NULL) | |
1b370bc2 | 613 | goto err_put_inode; |
549d6ed5 | 614 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
615 | int delegation_flags = 0; |
616 | ||
003707c7 TM |
617 | rcu_read_lock(); |
618 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
619 | if (delegation) | |
620 | delegation_flags = delegation->flags; | |
621 | rcu_read_unlock(); | |
15c831bf | 622 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
623 | nfs_inode_set_delegation(state->inode, |
624 | data->owner->so_cred, | |
625 | &data->o_res); | |
626 | else | |
627 | nfs_inode_reclaim_delegation(state->inode, | |
628 | data->owner->so_cred, | |
629 | &data->o_res); | |
630 | } | |
34310430 TM |
631 | |
632 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 633 | data->o_arg.fmode); |
24ac23ab | 634 | iput(inode); |
aac00a8d | 635 | out: |
24ac23ab | 636 | return state; |
1b370bc2 TM |
637 | err_put_inode: |
638 | iput(inode); | |
639 | err: | |
640 | return ERR_PTR(ret); | |
24ac23ab TM |
641 | } |
642 | ||
864472e9 TM |
643 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
644 | { | |
645 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
646 | struct nfs_open_context *ctx; | |
647 | ||
648 | spin_lock(&state->inode->i_lock); | |
649 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
650 | if (ctx->state != state) | |
651 | continue; | |
652 | get_nfs_open_context(ctx); | |
653 | spin_unlock(&state->inode->i_lock); | |
654 | return ctx; | |
655 | } | |
656 | spin_unlock(&state->inode->i_lock); | |
657 | return ERR_PTR(-ENOENT); | |
658 | } | |
659 | ||
6f220ed5 TM |
660 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
661 | { | |
662 | struct nfs4_opendata *opendata; | |
663 | ||
dc0b027d | 664 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
665 | if (opendata == NULL) |
666 | return ERR_PTR(-ENOMEM); | |
667 | opendata->state = state; | |
668 | atomic_inc(&state->count); | |
669 | return opendata; | |
670 | } | |
671 | ||
dc0b027d | 672 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 673 | { |
2ced46c2 | 674 | struct nfs4_state *newstate; |
864472e9 TM |
675 | int ret; |
676 | ||
dc0b027d TM |
677 | opendata->o_arg.open_flags = 0; |
678 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
679 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
680 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
681 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
682 | ret = _nfs4_proc_open(opendata); |
683 | if (ret != 0) | |
684 | return ret; | |
2ced46c2 | 685 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
686 | if (IS_ERR(newstate)) |
687 | return PTR_ERR(newstate); | |
dc0b027d | 688 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 689 | *res = newstate; |
864472e9 TM |
690 | return 0; |
691 | } | |
692 | ||
693 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
694 | { | |
864472e9 | 695 | struct nfs4_state *newstate; |
864472e9 TM |
696 | int ret; |
697 | ||
698 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 699 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
700 | smp_rmb(); |
701 | if (state->n_rdwr != 0) { | |
2ced46c2 | 702 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
703 | if (ret != 0) |
704 | return ret; | |
2ced46c2 TM |
705 | if (newstate != state) |
706 | return -ESTALE; | |
864472e9 TM |
707 | } |
708 | if (state->n_wronly != 0) { | |
2ced46c2 | 709 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
710 | if (ret != 0) |
711 | return ret; | |
2ced46c2 TM |
712 | if (newstate != state) |
713 | return -ESTALE; | |
864472e9 TM |
714 | } |
715 | if (state->n_rdonly != 0) { | |
2ced46c2 | 716 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
717 | if (ret != 0) |
718 | return ret; | |
2ced46c2 TM |
719 | if (newstate != state) |
720 | return -ESTALE; | |
864472e9 | 721 | } |
1ac7e2fd TM |
722 | /* |
723 | * We may have performed cached opens for all three recoveries. | |
724 | * Check if we need to update the current stateid. | |
725 | */ | |
726 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
727 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 728 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
729 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
730 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 731 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 732 | } |
864472e9 TM |
733 | return 0; |
734 | } | |
735 | ||
1da177e4 LT |
736 | /* |
737 | * OPEN_RECLAIM: | |
738 | * reclaim state on the server after a reboot. | |
1da177e4 | 739 | */ |
539cd03a | 740 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 741 | { |
1ac7e2fd | 742 | struct nfs_delegation *delegation; |
864472e9 | 743 | struct nfs4_opendata *opendata; |
dc0b027d | 744 | fmode_t delegation_type = 0; |
1da177e4 LT |
745 | int status; |
746 | ||
6f220ed5 TM |
747 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
748 | if (IS_ERR(opendata)) | |
749 | return PTR_ERR(opendata); | |
864472e9 TM |
750 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
751 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
752 | rcu_read_lock(); |
753 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 754 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 755 | delegation_type = delegation->type; |
1ac7e2fd | 756 | rcu_read_unlock(); |
864472e9 TM |
757 | opendata->o_arg.u.delegation_type = delegation_type; |
758 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 759 | nfs4_opendata_put(opendata); |
1da177e4 LT |
760 | return status; |
761 | } | |
762 | ||
539cd03a | 763 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
764 | { |
765 | struct nfs_server *server = NFS_SERVER(state->inode); | |
766 | struct nfs4_exception exception = { }; | |
767 | int err; | |
768 | do { | |
539cd03a | 769 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
770 | if (err != -NFS4ERR_DELAY) |
771 | break; | |
772 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
773 | } while (exception.retry); |
774 | return err; | |
775 | } | |
776 | ||
864472e9 TM |
777 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
778 | { | |
779 | struct nfs_open_context *ctx; | |
780 | int ret; | |
781 | ||
782 | ctx = nfs4_state_find_open_context(state); | |
783 | if (IS_ERR(ctx)) | |
784 | return PTR_ERR(ctx); | |
539cd03a | 785 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
786 | put_nfs_open_context(ctx); |
787 | return ret; | |
788 | } | |
789 | ||
13437e12 | 790 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 791 | { |
e56e0b78 | 792 | struct nfs4_opendata *opendata; |
864472e9 | 793 | int ret; |
1da177e4 | 794 | |
6f220ed5 TM |
795 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
796 | if (IS_ERR(opendata)) | |
797 | return PTR_ERR(opendata); | |
e56e0b78 | 798 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 799 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 800 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 801 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 802 | nfs4_opendata_put(opendata); |
864472e9 | 803 | return ret; |
1da177e4 LT |
804 | } |
805 | ||
13437e12 | 806 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
807 | { |
808 | struct nfs4_exception exception = { }; | |
539cd03a | 809 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
810 | int err; |
811 | do { | |
13437e12 | 812 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
813 | switch (err) { |
814 | case 0: | |
815 | return err; | |
816 | case -NFS4ERR_STALE_CLIENTID: | |
817 | case -NFS4ERR_STALE_STATEID: | |
818 | case -NFS4ERR_EXPIRED: | |
819 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 820 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
821 | return err; |
822 | } | |
823 | err = nfs4_handle_exception(server, err, &exception); | |
824 | } while (exception.retry); | |
825 | return err; | |
826 | } | |
827 | ||
cdd4e68b TM |
828 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
829 | { | |
830 | struct nfs4_opendata *data = calldata; | |
831 | ||
832 | data->rpc_status = task->tk_status; | |
833 | if (RPC_ASSASSINATED(task)) | |
834 | return; | |
26e976a8 | 835 | if (data->rpc_status == 0) { |
cdd4e68b TM |
836 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
837 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 838 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 839 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 840 | data->rpc_done = 1; |
26e976a8 | 841 | } |
cdd4e68b TM |
842 | } |
843 | ||
844 | static void nfs4_open_confirm_release(void *calldata) | |
845 | { | |
846 | struct nfs4_opendata *data = calldata; | |
847 | struct nfs4_state *state = NULL; | |
848 | ||
849 | /* If this request hasn't been cancelled, do nothing */ | |
850 | if (data->cancelled == 0) | |
851 | goto out_free; | |
852 | /* In case of error, no cleanup! */ | |
3e309914 | 853 | if (!data->rpc_done) |
cdd4e68b | 854 | goto out_free; |
cdd4e68b | 855 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 856 | if (!IS_ERR(state)) |
dc0b027d | 857 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 858 | out_free: |
c6d00e63 | 859 | nfs4_opendata_put(data); |
cdd4e68b TM |
860 | } |
861 | ||
862 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
863 | .rpc_call_done = nfs4_open_confirm_done, |
864 | .rpc_release = nfs4_open_confirm_release, | |
865 | }; | |
866 | ||
867 | /* | |
868 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
869 | */ | |
870 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
871 | { | |
872 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
873 | struct rpc_task *task; | |
5138fde0 TM |
874 | struct rpc_message msg = { |
875 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
876 | .rpc_argp = &data->c_arg, | |
877 | .rpc_resp = &data->c_res, | |
878 | .rpc_cred = data->owner->so_cred, | |
879 | }; | |
c970aa85 TM |
880 | struct rpc_task_setup task_setup_data = { |
881 | .rpc_client = server->client, | |
5138fde0 | 882 | .rpc_message = &msg, |
c970aa85 TM |
883 | .callback_ops = &nfs4_open_confirm_ops, |
884 | .callback_data = data, | |
101070ca | 885 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
886 | .flags = RPC_TASK_ASYNC, |
887 | }; | |
1da177e4 LT |
888 | int status; |
889 | ||
c6d00e63 | 890 | kref_get(&data->kref); |
3e309914 TM |
891 | data->rpc_done = 0; |
892 | data->rpc_status = 0; | |
5138fde0 | 893 | data->timestamp = jiffies; |
c970aa85 | 894 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 895 | if (IS_ERR(task)) |
cdd4e68b | 896 | return PTR_ERR(task); |
cdd4e68b TM |
897 | status = nfs4_wait_for_completion_rpc_task(task); |
898 | if (status != 0) { | |
899 | data->cancelled = 1; | |
900 | smp_wmb(); | |
901 | } else | |
902 | status = data->rpc_status; | |
e6b3c4db | 903 | rpc_put_task(task); |
1da177e4 LT |
904 | return status; |
905 | } | |
906 | ||
24ac23ab | 907 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 908 | { |
24ac23ab TM |
909 | struct nfs4_opendata *data = calldata; |
910 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 911 | |
24ac23ab TM |
912 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
913 | return; | |
aac00a8d TM |
914 | /* |
915 | * Check if we still need to send an OPEN call, or if we can use | |
916 | * a delegation instead. | |
917 | */ | |
918 | if (data->state != NULL) { | |
919 | struct nfs_delegation *delegation; | |
920 | ||
dc0b027d | 921 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 922 | goto out_no_action; |
aac00a8d TM |
923 | rcu_read_lock(); |
924 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
925 | if (delegation != NULL && | |
15c831bf | 926 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 927 | rcu_read_unlock(); |
6ee41268 | 928 | goto out_no_action; |
aac00a8d TM |
929 | } |
930 | rcu_read_unlock(); | |
931 | } | |
24ac23ab | 932 | /* Update sequence id. */ |
9f958ab8 | 933 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 934 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 935 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 936 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
937 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
938 | } | |
26e976a8 | 939 | data->timestamp = jiffies; |
5138fde0 | 940 | rpc_call_start(task); |
6ee41268 TM |
941 | return; |
942 | out_no_action: | |
943 | task->tk_action = NULL; | |
944 | ||
24ac23ab | 945 | } |
1da177e4 | 946 | |
24ac23ab TM |
947 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
948 | { | |
949 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 950 | |
24ac23ab TM |
951 | data->rpc_status = task->tk_status; |
952 | if (RPC_ASSASSINATED(task)) | |
953 | return; | |
954 | if (task->tk_status == 0) { | |
955 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
956 | case S_IFREG: |
957 | break; | |
958 | case S_IFLNK: | |
24ac23ab | 959 | data->rpc_status = -ELOOP; |
6f926b5b TM |
960 | break; |
961 | case S_IFDIR: | |
24ac23ab | 962 | data->rpc_status = -EISDIR; |
6f926b5b TM |
963 | break; |
964 | default: | |
24ac23ab | 965 | data->rpc_status = -ENOTDIR; |
6f926b5b | 966 | } |
26e976a8 | 967 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
968 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
969 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 970 | } |
3e309914 | 971 | data->rpc_done = 1; |
24ac23ab | 972 | } |
6f926b5b | 973 | |
24ac23ab TM |
974 | static void nfs4_open_release(void *calldata) |
975 | { | |
976 | struct nfs4_opendata *data = calldata; | |
977 | struct nfs4_state *state = NULL; | |
978 | ||
979 | /* If this request hasn't been cancelled, do nothing */ | |
980 | if (data->cancelled == 0) | |
981 | goto out_free; | |
982 | /* In case of error, no cleanup! */ | |
3e309914 | 983 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
984 | goto out_free; |
985 | /* In case we need an open_confirm, no cleanup! */ | |
986 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
987 | goto out_free; | |
24ac23ab | 988 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 989 | if (!IS_ERR(state)) |
dc0b027d | 990 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 991 | out_free: |
c6d00e63 | 992 | nfs4_opendata_put(data); |
24ac23ab TM |
993 | } |
994 | ||
995 | static const struct rpc_call_ops nfs4_open_ops = { | |
996 | .rpc_call_prepare = nfs4_open_prepare, | |
997 | .rpc_call_done = nfs4_open_done, | |
998 | .rpc_release = nfs4_open_release, | |
999 | }; | |
1000 | ||
1001 | /* | |
1002 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1003 | */ | |
1004 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1005 | { | |
1006 | struct inode *dir = data->dir->d_inode; | |
1007 | struct nfs_server *server = NFS_SERVER(dir); | |
1008 | struct nfs_openargs *o_arg = &data->o_arg; | |
1009 | struct nfs_openres *o_res = &data->o_res; | |
1010 | struct rpc_task *task; | |
5138fde0 TM |
1011 | struct rpc_message msg = { |
1012 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1013 | .rpc_argp = o_arg, | |
1014 | .rpc_resp = o_res, | |
1015 | .rpc_cred = data->owner->so_cred, | |
1016 | }; | |
c970aa85 TM |
1017 | struct rpc_task_setup task_setup_data = { |
1018 | .rpc_client = server->client, | |
5138fde0 | 1019 | .rpc_message = &msg, |
c970aa85 TM |
1020 | .callback_ops = &nfs4_open_ops, |
1021 | .callback_data = data, | |
101070ca | 1022 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1023 | .flags = RPC_TASK_ASYNC, |
1024 | }; | |
24ac23ab TM |
1025 | int status; |
1026 | ||
c6d00e63 | 1027 | kref_get(&data->kref); |
3e309914 TM |
1028 | data->rpc_done = 0; |
1029 | data->rpc_status = 0; | |
2ced46c2 | 1030 | data->cancelled = 0; |
c970aa85 | 1031 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1032 | if (IS_ERR(task)) |
24ac23ab | 1033 | return PTR_ERR(task); |
24ac23ab TM |
1034 | status = nfs4_wait_for_completion_rpc_task(task); |
1035 | if (status != 0) { | |
1036 | data->cancelled = 1; | |
1037 | smp_wmb(); | |
1038 | } else | |
1039 | status = data->rpc_status; | |
e6b3c4db | 1040 | rpc_put_task(task); |
3e309914 | 1041 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1042 | return status; |
1043 | ||
9936781d TM |
1044 | if (o_res->fh.size == 0) |
1045 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1046 | ||
56ae19f3 TM |
1047 | if (o_arg->open_flags & O_CREAT) { |
1048 | update_changeattr(dir, &o_res->cinfo); | |
1049 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1050 | } else | |
1051 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1052 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1053 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1054 | if (status != 0) |
24ac23ab | 1055 | return status; |
1da177e4 LT |
1056 | } |
1057 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1058 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1059 | return 0; |
1da177e4 LT |
1060 | } |
1061 | ||
10afec90 | 1062 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1063 | { |
7539bbab | 1064 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 1065 | int ret; |
58d9714a | 1066 | |
6b30954e | 1067 | for (;;) { |
65de872e | 1068 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e TM |
1069 | if (ret != 0) |
1070 | return ret; | |
e598d843 TM |
1071 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1072 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1073 | break; |
58d9714a | 1074 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
1075 | } |
1076 | return 0; | |
58d9714a TM |
1077 | } |
1078 | ||
1da177e4 LT |
1079 | /* |
1080 | * OPEN_EXPIRED: | |
1081 | * reclaim state on the server after a network partition. | |
1082 | * Assumes caller holds the appropriate lock | |
1083 | */ | |
539cd03a | 1084 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1085 | { |
e56e0b78 | 1086 | struct nfs4_opendata *opendata; |
864472e9 | 1087 | int ret; |
1da177e4 | 1088 | |
6f220ed5 TM |
1089 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1090 | if (IS_ERR(opendata)) | |
1091 | return PTR_ERR(opendata); | |
864472e9 | 1092 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1093 | if (ret == -ESTALE) |
539cd03a | 1094 | d_drop(ctx->path.dentry); |
c6d00e63 | 1095 | nfs4_opendata_put(opendata); |
864472e9 | 1096 | return ret; |
1da177e4 LT |
1097 | } |
1098 | ||
539cd03a | 1099 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1100 | { |
539cd03a | 1101 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1102 | struct nfs4_exception exception = { }; |
1103 | int err; | |
1104 | ||
1105 | do { | |
539cd03a | 1106 | err = _nfs4_open_expired(ctx, state); |
027b6ca0 TM |
1107 | if (err != -NFS4ERR_DELAY) |
1108 | break; | |
1109 | nfs4_handle_exception(server, err, &exception); | |
202b50dc TM |
1110 | } while (exception.retry); |
1111 | return err; | |
1112 | } | |
1113 | ||
1da177e4 LT |
1114 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1115 | { | |
1da177e4 | 1116 | struct nfs_open_context *ctx; |
864472e9 | 1117 | int ret; |
1da177e4 | 1118 | |
864472e9 TM |
1119 | ctx = nfs4_state_find_open_context(state); |
1120 | if (IS_ERR(ctx)) | |
1121 | return PTR_ERR(ctx); | |
539cd03a | 1122 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1123 | put_nfs_open_context(ctx); |
1124 | return ret; | |
1da177e4 LT |
1125 | } |
1126 | ||
aa53ed54 JL |
1127 | /* |
1128 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1129 | * fields corresponding to attributes that were used to store the verifier. | |
1130 | * Make sure we clobber those fields in the later setattr call | |
1131 | */ | |
1132 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1133 | { | |
1134 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1135 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1136 | sattr->ia_valid |= ATTR_ATIME; | |
1137 | ||
1138 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1139 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1140 | sattr->ia_valid |= ATTR_MTIME; | |
1141 | } | |
1142 | ||
1da177e4 | 1143 | /* |
24ac23ab | 1144 | * Returns a referenced nfs4_state |
1da177e4 | 1145 | */ |
dc0b027d | 1146 | 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 |
1147 | { |
1148 | struct nfs4_state_owner *sp; | |
1149 | struct nfs4_state *state = NULL; | |
1150 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1151 | struct nfs4_opendata *opendata; |
aac00a8d | 1152 | int status; |
1da177e4 LT |
1153 | |
1154 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1155 | status = -ENOMEM; |
1156 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1157 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1158 | goto out_err; | |
1159 | } | |
58d9714a TM |
1160 | status = nfs4_recover_expired_lease(server); |
1161 | if (status != 0) | |
b4454fe1 | 1162 | goto err_put_state_owner; |
aac00a8d | 1163 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1164 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1165 | status = -ENOMEM; |
dc0b027d | 1166 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1167 | if (opendata == NULL) |
95d35cb4 | 1168 | goto err_put_state_owner; |
1da177e4 | 1169 | |
aac00a8d TM |
1170 | if (path->dentry->d_inode != NULL) |
1171 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1172 | ||
24ac23ab | 1173 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1174 | if (status != 0) |
c6d00e63 | 1175 | goto err_opendata_put; |
1da177e4 | 1176 | |
aa53ed54 JL |
1177 | if (opendata->o_arg.open_flags & O_EXCL) |
1178 | nfs4_exclusive_attrset(opendata, sattr); | |
1179 | ||
24ac23ab | 1180 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1181 | status = PTR_ERR(state); |
1182 | if (IS_ERR(state)) | |
c6d00e63 | 1183 | goto err_opendata_put; |
c6d00e63 | 1184 | nfs4_opendata_put(opendata); |
1da177e4 | 1185 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1186 | *res = state; |
1187 | return 0; | |
c6d00e63 TM |
1188 | err_opendata_put: |
1189 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1190 | err_put_state_owner: |
1191 | nfs4_put_state_owner(sp); | |
1da177e4 | 1192 | out_err: |
1da177e4 LT |
1193 | *res = NULL; |
1194 | return status; | |
1195 | } | |
1196 | ||
1197 | ||
dc0b027d | 1198 | 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 |
1199 | { |
1200 | struct nfs4_exception exception = { }; | |
1201 | struct nfs4_state *res; | |
1202 | int status; | |
1203 | ||
1204 | do { | |
dc0b027d | 1205 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1206 | if (status == 0) |
1207 | break; | |
1208 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1209 | * book-keeping w.r.t. state-changing operations | |
1210 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1211 | * It is actually a sign of a bug on the client or on the server. | |
1212 | * | |
1213 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1214 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1215 | * have unhashed the old state_owner for us, and that we can |
1216 | * therefore safely retry using a new one. We should still warn | |
1217 | * the user though... | |
1218 | */ | |
1219 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1220 | printk(KERN_WARNING "NFS: v4 server %s " |
1221 | " returned a bad sequence-id error!\n", | |
1222 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1223 | exception.retry = 1; |
1224 | continue; | |
1225 | } | |
550f5747 TM |
1226 | /* |
1227 | * BAD_STATEID on OPEN means that the server cancelled our | |
1228 | * state before it received the OPEN_CONFIRM. | |
1229 | * Recover by retrying the request as per the discussion | |
1230 | * on Page 181 of RFC3530. | |
1231 | */ | |
1232 | if (status == -NFS4ERR_BAD_STATEID) { | |
1233 | exception.retry = 1; | |
1234 | continue; | |
1235 | } | |
aac00a8d TM |
1236 | if (status == -EAGAIN) { |
1237 | /* We must have found a delegation */ | |
1238 | exception.retry = 1; | |
1239 | continue; | |
1240 | } | |
1da177e4 LT |
1241 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1242 | status, &exception)); | |
1243 | } while (exception.retry); | |
1244 | return res; | |
1245 | } | |
1246 | ||
659bfcd6 TM |
1247 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1248 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1249 | struct nfs4_state *state) | |
1da177e4 | 1250 | { |
3e4f6290 | 1251 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1252 | struct nfs_setattrargs arg = { |
3e4f6290 | 1253 | .fh = NFS_FH(inode), |
1da177e4 LT |
1254 | .iap = sattr, |
1255 | .server = server, | |
1256 | .bitmask = server->attr_bitmask, | |
1257 | }; | |
1258 | struct nfs_setattrres res = { | |
1259 | .fattr = fattr, | |
1260 | .server = server, | |
1261 | }; | |
1262 | struct rpc_message msg = { | |
659bfcd6 TM |
1263 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1264 | .rpc_argp = &arg, | |
1265 | .rpc_resp = &res, | |
1266 | .rpc_cred = cred, | |
1da177e4 | 1267 | }; |
26e976a8 | 1268 | unsigned long timestamp = jiffies; |
65e4308d | 1269 | int status; |
1da177e4 | 1270 | |
0e574af1 | 1271 | nfs_fattr_init(fattr); |
1da177e4 | 1272 | |
3e4f6290 TM |
1273 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1274 | /* Use that stateid */ | |
1275 | } else if (state != NULL) { | |
08e9eac4 TM |
1276 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1277 | } else | |
1da177e4 LT |
1278 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1279 | ||
65e4308d | 1280 | status = rpc_call_sync(server->client, &msg, 0); |
26e976a8 TM |
1281 | if (status == 0 && state != NULL) |
1282 | renew_lease(server, timestamp); | |
65e4308d | 1283 | return status; |
1da177e4 LT |
1284 | } |
1285 | ||
659bfcd6 TM |
1286 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1287 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1288 | struct nfs4_state *state) | |
1da177e4 | 1289 | { |
3e4f6290 | 1290 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1291 | struct nfs4_exception exception = { }; |
1292 | int err; | |
1293 | do { | |
1294 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1295 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1296 | &exception); |
1297 | } while (exception.retry); | |
1298 | return err; | |
1299 | } | |
1300 | ||
1301 | struct nfs4_closedata { | |
4a35bd41 | 1302 | struct path path; |
1da177e4 LT |
1303 | struct inode *inode; |
1304 | struct nfs4_state *state; | |
1305 | struct nfs_closeargs arg; | |
1306 | struct nfs_closeres res; | |
516a6af6 | 1307 | struct nfs_fattr fattr; |
26e976a8 | 1308 | unsigned long timestamp; |
1da177e4 LT |
1309 | }; |
1310 | ||
963d8fe5 | 1311 | static void nfs4_free_closedata(void *data) |
9512135d | 1312 | { |
963d8fe5 TM |
1313 | struct nfs4_closedata *calldata = data; |
1314 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1315 | |
1316 | nfs4_put_open_state(calldata->state); | |
1317 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1318 | nfs4_put_state_owner(sp); |
31f31db1 | 1319 | path_put(&calldata->path); |
9512135d TM |
1320 | kfree(calldata); |
1321 | } | |
1322 | ||
963d8fe5 | 1323 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1324 | { |
963d8fe5 | 1325 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1326 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1327 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1328 | ||
4ce70ada TM |
1329 | if (RPC_ASSASSINATED(task)) |
1330 | return; | |
1da177e4 LT |
1331 | /* hmm. we are done with the inode, and in the process of freeing |
1332 | * the state_owner. we keep this around to process errors | |
1333 | */ | |
1da177e4 LT |
1334 | switch (task->tk_status) { |
1335 | case 0: | |
45328c35 | 1336 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1337 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1338 | break; |
1339 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1340 | case -NFS4ERR_OLD_STATEID: |
1341 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1342 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1343 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1344 | break; |
1da177e4 | 1345 | default: |
9e33bed5 | 1346 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { |
1da177e4 LT |
1347 | rpc_restart_call(task); |
1348 | return; | |
1349 | } | |
1350 | } | |
516a6af6 | 1351 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1352 | } |
1353 | ||
4ce70ada | 1354 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1355 | { |
4ce70ada | 1356 | struct nfs4_closedata *calldata = data; |
9512135d | 1357 | struct nfs4_state *state = calldata->state; |
003707c7 | 1358 | int clear_rd, clear_wr, clear_rdwr; |
9512135d | 1359 | |
963d8fe5 | 1360 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1361 | return; |
003707c7 | 1362 | |
003707c7 | 1363 | clear_rd = clear_wr = clear_rdwr = 0; |
4cecb76f | 1364 | spin_lock(&state->owner->so_lock); |
003707c7 | 1365 | /* Calculate the change in open mode */ |
e7616923 | 1366 | if (state->n_rdwr == 0) { |
003707c7 | 1367 | if (state->n_rdonly == 0) { |
003707c7 TM |
1368 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
1369 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1370 | } | |
1371 | if (state->n_wronly == 0) { | |
003707c7 TM |
1372 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
1373 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1374 | } | |
e7616923 | 1375 | } |
4cecb76f | 1376 | spin_unlock(&state->owner->so_lock); |
003707c7 | 1377 | if (!clear_rd && !clear_wr && !clear_rdwr) { |
963d8fe5 TM |
1378 | /* Note: exit _without_ calling nfs4_close_done */ |
1379 | task->tk_action = NULL; | |
9512135d TM |
1380 | return; |
1381 | } | |
516a6af6 | 1382 | nfs_fattr_init(calldata->res.fattr); |
45328c35 | 1383 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1384 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1385 | calldata->arg.fmode = FMODE_READ; |
45328c35 | 1386 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1387 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1388 | calldata->arg.fmode = FMODE_WRITE; |
45328c35 | 1389 | } |
26e976a8 | 1390 | calldata->timestamp = jiffies; |
5138fde0 | 1391 | rpc_call_start(task); |
1da177e4 LT |
1392 | } |
1393 | ||
963d8fe5 | 1394 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1395 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1396 | .rpc_call_done = nfs4_close_done, |
1397 | .rpc_release = nfs4_free_closedata, | |
1398 | }; | |
1399 | ||
1da177e4 LT |
1400 | /* |
1401 | * It is possible for data to be read/written from a mem-mapped file | |
1402 | * after the sys_close call (which hits the vfs layer as a flush). | |
1403 | * This means that we can't safely call nfsv4 close on a file until | |
1404 | * the inode is cleared. This in turn means that we are not good | |
1405 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1406 | * share state even when we are done with one of the three share | |
1407 | * stateid's in the inode. | |
1408 | * | |
1409 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1410 | */ | |
a49c3c77 | 1411 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1412 | { |
4a35bd41 | 1413 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1414 | struct nfs4_closedata *calldata; |
b39e625b TM |
1415 | struct nfs4_state_owner *sp = state->owner; |
1416 | struct rpc_task *task; | |
5138fde0 TM |
1417 | struct rpc_message msg = { |
1418 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1419 | .rpc_cred = state->owner->so_cred, | |
1420 | }; | |
c970aa85 TM |
1421 | struct rpc_task_setup task_setup_data = { |
1422 | .rpc_client = server->client, | |
5138fde0 | 1423 | .rpc_message = &msg, |
c970aa85 | 1424 | .callback_ops = &nfs4_close_ops, |
101070ca | 1425 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1426 | .flags = RPC_TASK_ASYNC, |
1427 | }; | |
9512135d | 1428 | int status = -ENOMEM; |
1da177e4 | 1429 | |
9512135d | 1430 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1431 | if (calldata == NULL) |
9512135d | 1432 | goto out; |
4a35bd41 | 1433 | calldata->inode = state->inode; |
1da177e4 | 1434 | calldata->state = state; |
4a35bd41 | 1435 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1436 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1437 | /* Serialization for the sequence id */ |
cee54fc9 | 1438 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1439 | if (calldata->arg.seqid == NULL) |
1440 | goto out_free_calldata; | |
dc0b027d | 1441 | calldata->arg.fmode = 0; |
516a6af6 TM |
1442 | calldata->arg.bitmask = server->attr_bitmask; |
1443 | calldata->res.fattr = &calldata->fattr; | |
c1d51931 | 1444 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1445 | calldata->res.server = server; |
4a35bd41 TM |
1446 | calldata->path.mnt = mntget(path->mnt); |
1447 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1448 | |
5138fde0 TM |
1449 | msg.rpc_argp = &calldata->arg, |
1450 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1451 | task_setup_data.callback_data = calldata; |
1452 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1453 | if (IS_ERR(task)) |
1454 | return PTR_ERR(task); | |
a49c3c77 TM |
1455 | status = 0; |
1456 | if (wait) | |
1457 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1458 | rpc_put_task(task); |
a49c3c77 | 1459 | return status; |
9512135d TM |
1460 | out_free_calldata: |
1461 | kfree(calldata); | |
1462 | out: | |
b39e625b TM |
1463 | nfs4_put_open_state(state); |
1464 | nfs4_put_state_owner(sp); | |
9512135d | 1465 | return status; |
1da177e4 LT |
1466 | } |
1467 | ||
dc0b027d | 1468 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1469 | { |
1470 | struct file *filp; | |
1b45c46c | 1471 | int ret; |
02a913a7 | 1472 | |
1b45c46c | 1473 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1474 | if (fmode & FMODE_EXEC) { |
af22f94a | 1475 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1476 | state->owner->so_cred, |
1477 | nd->intent.open.flags); | |
1478 | if (ret < 0) | |
1479 | goto out_close; | |
1480 | } | |
4a35bd41 | 1481 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1482 | if (!IS_ERR(filp)) { |
1483 | struct nfs_open_context *ctx; | |
cd3758e3 | 1484 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1485 | ctx->state = state; |
95cf959b TM |
1486 | return 0; |
1487 | } | |
1b45c46c TM |
1488 | ret = PTR_ERR(filp); |
1489 | out_close: | |
dc0b027d | 1490 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1491 | return ret; |
02a913a7 TM |
1492 | } |
1493 | ||
1494 | struct dentry * | |
1da177e4 LT |
1495 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1496 | { | |
ad389da7 | 1497 | struct path path = { |
4ac91378 | 1498 | .mnt = nd->path.mnt, |
ad389da7 TM |
1499 | .dentry = dentry, |
1500 | }; | |
4ac91378 | 1501 | struct dentry *parent; |
1da177e4 LT |
1502 | struct iattr attr; |
1503 | struct rpc_cred *cred; | |
1504 | struct nfs4_state *state; | |
02a913a7 | 1505 | struct dentry *res; |
dc0b027d | 1506 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
1507 | |
1508 | if (nd->flags & LOOKUP_CREATE) { | |
1509 | attr.ia_mode = nd->intent.open.create_mode; | |
1510 | attr.ia_valid = ATTR_MODE; | |
1511 | if (!IS_POSIXACL(dir)) | |
1512 | attr.ia_mode &= ~current->fs->umask; | |
1513 | } else { | |
1514 | attr.ia_valid = 0; | |
1515 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1516 | } | |
1517 | ||
98a8e323 | 1518 | cred = rpc_lookup_cred(); |
1da177e4 | 1519 | if (IS_ERR(cred)) |
02a913a7 | 1520 | return (struct dentry *)cred; |
565277f6 TM |
1521 | parent = dentry->d_parent; |
1522 | /* Protect against concurrent sillydeletes */ | |
1523 | nfs_block_sillyrename(parent); | |
dc0b027d | 1524 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1525 | put_rpccred(cred); |
02a913a7 | 1526 | if (IS_ERR(state)) { |
d75340cc | 1527 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 1528 | d_add(dentry, NULL); |
d75340cc TM |
1529 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1530 | } | |
565277f6 | 1531 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
1532 | return (struct dentry *)state; |
1533 | } | |
24ac23ab | 1534 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 1535 | if (res != NULL) |
deee9369 | 1536 | path.dentry = res; |
d75340cc | 1537 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 1538 | nfs_unblock_sillyrename(parent); |
dc0b027d | 1539 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 1540 | return res; |
1da177e4 LT |
1541 | } |
1542 | ||
1543 | int | |
02a913a7 | 1544 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1545 | { |
ad389da7 | 1546 | struct path path = { |
4ac91378 | 1547 | .mnt = nd->path.mnt, |
ad389da7 TM |
1548 | .dentry = dentry, |
1549 | }; | |
1da177e4 LT |
1550 | struct rpc_cred *cred; |
1551 | struct nfs4_state *state; | |
dc0b027d | 1552 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 1553 | |
98a8e323 | 1554 | cred = rpc_lookup_cred(); |
1da177e4 LT |
1555 | if (IS_ERR(cred)) |
1556 | return PTR_ERR(cred); | |
dc0b027d | 1557 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 1558 | put_rpccred(cred); |
02a913a7 TM |
1559 | if (IS_ERR(state)) { |
1560 | switch (PTR_ERR(state)) { | |
1561 | case -EPERM: | |
1562 | case -EACCES: | |
1563 | case -EDQUOT: | |
1564 | case -ENOSPC: | |
1565 | case -EROFS: | |
1566 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1567 | return 1; | |
b87c0adf CL |
1568 | default: |
1569 | goto out_drop; | |
02a913a7 | 1570 | } |
02a913a7 | 1571 | } |
24ac23ab | 1572 | if (state->inode == dentry->d_inode) { |
d75340cc | 1573 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 1574 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
1575 | return 1; |
1576 | } | |
dc0b027d | 1577 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
1578 | out_drop: |
1579 | d_drop(dentry); | |
1da177e4 LT |
1580 | return 0; |
1581 | } | |
1582 | ||
1583 | ||
1584 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1585 | { | |
1586 | struct nfs4_server_caps_res res = {}; | |
1587 | struct rpc_message msg = { | |
1588 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1589 | .rpc_argp = fhandle, | |
1590 | .rpc_resp = &res, | |
1591 | }; | |
1592 | int status; | |
1593 | ||
1594 | status = rpc_call_sync(server->client, &msg, 0); | |
1595 | if (status == 0) { | |
1596 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1597 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1598 | server->caps |= NFS_CAP_ACLS; | |
1599 | if (res.has_links != 0) | |
1600 | server->caps |= NFS_CAP_HARDLINKS; | |
1601 | if (res.has_symlinks != 0) | |
1602 | server->caps |= NFS_CAP_SYMLINKS; | |
1603 | server->acl_bitmask = res.acl_bitmask; | |
1604 | } | |
1605 | return status; | |
1606 | } | |
1607 | ||
55a97593 | 1608 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1609 | { |
1610 | struct nfs4_exception exception = { }; | |
1611 | int err; | |
1612 | do { | |
1613 | err = nfs4_handle_exception(server, | |
1614 | _nfs4_server_capabilities(server, fhandle), | |
1615 | &exception); | |
1616 | } while (exception.retry); | |
1617 | return err; | |
1618 | } | |
1619 | ||
1620 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1621 | struct nfs_fsinfo *info) | |
1622 | { | |
1da177e4 LT |
1623 | struct nfs4_lookup_root_arg args = { |
1624 | .bitmask = nfs4_fattr_bitmap, | |
1625 | }; | |
1626 | struct nfs4_lookup_res res = { | |
1627 | .server = server, | |
0e574af1 | 1628 | .fattr = info->fattr, |
1da177e4 LT |
1629 | .fh = fhandle, |
1630 | }; | |
1631 | struct rpc_message msg = { | |
1632 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1633 | .rpc_argp = &args, | |
1634 | .rpc_resp = &res, | |
1635 | }; | |
0e574af1 | 1636 | nfs_fattr_init(info->fattr); |
1da177e4 LT |
1637 | return rpc_call_sync(server->client, &msg, 0); |
1638 | } | |
1639 | ||
1640 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1641 | struct nfs_fsinfo *info) | |
1642 | { | |
1643 | struct nfs4_exception exception = { }; | |
1644 | int err; | |
1645 | do { | |
1646 | err = nfs4_handle_exception(server, | |
1647 | _nfs4_lookup_root(server, fhandle, info), | |
1648 | &exception); | |
1649 | } while (exception.retry); | |
1650 | return err; | |
1651 | } | |
1652 | ||
54ceac45 DH |
1653 | /* |
1654 | * get the file handle for the "/" directory on the server | |
1655 | */ | |
1da177e4 | 1656 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1657 | struct nfs_fsinfo *info) |
1da177e4 | 1658 | { |
1da177e4 LT |
1659 | int status; |
1660 | ||
1da177e4 | 1661 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
1662 | if (status == 0) |
1663 | status = nfs4_server_capabilities(server, fhandle); | |
1664 | if (status == 0) | |
1665 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 1666 | return nfs4_map_errors(status); |
1da177e4 LT |
1667 | } |
1668 | ||
6b97fd3d MN |
1669 | /* |
1670 | * Get locations and (maybe) other attributes of a referral. | |
1671 | * Note that we'll actually follow the referral later when | |
1672 | * we detect fsid mismatch in inode revalidation | |
1673 | */ | |
56659e99 | 1674 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
1675 | { |
1676 | int status = -ENOMEM; | |
1677 | struct page *page = NULL; | |
1678 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
1679 | |
1680 | page = alloc_page(GFP_KERNEL); | |
1681 | if (page == NULL) | |
1682 | goto out; | |
1683 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1684 | if (locations == NULL) | |
1685 | goto out; | |
1686 | ||
c228fd3a | 1687 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
1688 | if (status != 0) |
1689 | goto out; | |
1690 | /* Make sure server returned a different fsid for the referral */ | |
1691 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 1692 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
1693 | status = -EIO; |
1694 | goto out; | |
1695 | } | |
1696 | ||
1697 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1698 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1699 | if (!fattr->mode) | |
1700 | fattr->mode = S_IFDIR; | |
1701 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1702 | out: | |
1703 | if (page) | |
1704 | __free_page(page); | |
1705 | if (locations) | |
1706 | kfree(locations); | |
1707 | return status; | |
1708 | } | |
1709 | ||
1da177e4 LT |
1710 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1711 | { | |
1712 | struct nfs4_getattr_arg args = { | |
1713 | .fh = fhandle, | |
1714 | .bitmask = server->attr_bitmask, | |
1715 | }; | |
1716 | struct nfs4_getattr_res res = { | |
1717 | .fattr = fattr, | |
1718 | .server = server, | |
1719 | }; | |
1720 | struct rpc_message msg = { | |
1721 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1722 | .rpc_argp = &args, | |
1723 | .rpc_resp = &res, | |
1724 | }; | |
1725 | ||
0e574af1 | 1726 | nfs_fattr_init(fattr); |
1da177e4 LT |
1727 | return rpc_call_sync(server->client, &msg, 0); |
1728 | } | |
1729 | ||
1730 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1731 | { | |
1732 | struct nfs4_exception exception = { }; | |
1733 | int err; | |
1734 | do { | |
1735 | err = nfs4_handle_exception(server, | |
1736 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1737 | &exception); | |
1738 | } while (exception.retry); | |
1739 | return err; | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * The file is not closed if it is opened due to the a request to change | |
1744 | * the size of the file. The open call will not be needed once the | |
1745 | * VFS layer lookup-intents are implemented. | |
1746 | * | |
1747 | * Close is called when the inode is destroyed. | |
1748 | * If we haven't opened the file for O_WRONLY, we | |
1749 | * need to in the size_change case to obtain a stateid. | |
1750 | * | |
1751 | * Got race? | |
1752 | * Because OPEN is always done by name in nfsv4, it is | |
1753 | * possible that we opened a different file by the same | |
1754 | * name. We can recognize this race condition, but we | |
1755 | * can't do anything about it besides returning an error. | |
1756 | * | |
1757 | * This will be fixed with VFS changes (lookup-intent). | |
1758 | */ | |
1759 | static int | |
1760 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1761 | struct iattr *sattr) | |
1762 | { | |
08e9eac4 | 1763 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 1764 | struct rpc_cred *cred = NULL; |
d530838b | 1765 | struct nfs4_state *state = NULL; |
1da177e4 LT |
1766 | int status; |
1767 | ||
0e574af1 | 1768 | nfs_fattr_init(fattr); |
1da177e4 | 1769 | |
d530838b | 1770 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
1771 | if (sattr->ia_valid & ATTR_FILE) { |
1772 | struct nfs_open_context *ctx; | |
1773 | ||
1774 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
1775 | if (ctx) { |
1776 | cred = ctx->cred; | |
1777 | state = ctx->state; | |
1778 | } | |
659bfcd6 | 1779 | } |
08e9eac4 | 1780 | |
659bfcd6 | 1781 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
1782 | if (status == 0) |
1783 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
1784 | return status; |
1785 | } | |
1786 | ||
56659e99 TM |
1787 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
1788 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
1789 | struct nfs_fattr *fattr) |
1790 | { | |
1791 | int status; | |
1792 | struct nfs4_lookup_arg args = { | |
1793 | .bitmask = server->attr_bitmask, | |
1794 | .dir_fh = dirfh, | |
1795 | .name = name, | |
1796 | }; | |
1797 | struct nfs4_lookup_res res = { | |
1798 | .server = server, | |
1799 | .fattr = fattr, | |
1800 | .fh = fhandle, | |
1801 | }; | |
1802 | struct rpc_message msg = { | |
1803 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1804 | .rpc_argp = &args, | |
1805 | .rpc_resp = &res, | |
1806 | }; | |
1807 | ||
1808 | nfs_fattr_init(fattr); | |
1809 | ||
1810 | dprintk("NFS call lookupfh %s\n", name->name); | |
1811 | status = rpc_call_sync(server->client, &msg, 0); | |
1812 | dprintk("NFS reply lookupfh: %d\n", status); | |
2b3de441 DH |
1813 | return status; |
1814 | } | |
1815 | ||
1816 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
1817 | struct qstr *name, struct nfs_fh *fhandle, | |
1818 | struct nfs_fattr *fattr) | |
1819 | { | |
1820 | struct nfs4_exception exception = { }; | |
1821 | int err; | |
1822 | do { | |
4e56e082 TM |
1823 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
1824 | /* FIXME: !!!! */ | |
1825 | if (err == -NFS4ERR_MOVED) { | |
1826 | err = -EREMOTE; | |
1827 | break; | |
1828 | } | |
1829 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
1830 | } while (exception.retry); |
1831 | return err; | |
1832 | } | |
1833 | ||
56659e99 | 1834 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
1835 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1836 | { | |
4e56e082 | 1837 | int status; |
1da177e4 LT |
1838 | |
1839 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 1840 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
1841 | if (status == -NFS4ERR_MOVED) |
1842 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
1843 | dprintk("NFS reply lookup: %d\n", status); |
1844 | return status; | |
1845 | } | |
1846 | ||
1847 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1848 | { | |
1849 | struct nfs4_exception exception = { }; | |
1850 | int err; | |
1851 | do { | |
1852 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1853 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1854 | &exception); | |
1855 | } while (exception.retry); | |
1856 | return err; | |
1857 | } | |
1858 | ||
1859 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1860 | { | |
76b32999 TM |
1861 | struct nfs_server *server = NFS_SERVER(inode); |
1862 | struct nfs_fattr fattr; | |
1da177e4 LT |
1863 | struct nfs4_accessargs args = { |
1864 | .fh = NFS_FH(inode), | |
76b32999 TM |
1865 | .bitmask = server->attr_bitmask, |
1866 | }; | |
1867 | struct nfs4_accessres res = { | |
1868 | .server = server, | |
1869 | .fattr = &fattr, | |
1da177e4 | 1870 | }; |
1da177e4 LT |
1871 | struct rpc_message msg = { |
1872 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1873 | .rpc_argp = &args, | |
1874 | .rpc_resp = &res, | |
1875 | .rpc_cred = entry->cred, | |
1876 | }; | |
1877 | int mode = entry->mask; | |
1878 | int status; | |
1879 | ||
1880 | /* | |
1881 | * Determine which access bits we want to ask for... | |
1882 | */ | |
1883 | if (mode & MAY_READ) | |
1884 | args.access |= NFS4_ACCESS_READ; | |
1885 | if (S_ISDIR(inode->i_mode)) { | |
1886 | if (mode & MAY_WRITE) | |
1887 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1888 | if (mode & MAY_EXEC) | |
1889 | args.access |= NFS4_ACCESS_LOOKUP; | |
1890 | } else { | |
1891 | if (mode & MAY_WRITE) | |
1892 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1893 | if (mode & MAY_EXEC) | |
1894 | args.access |= NFS4_ACCESS_EXECUTE; | |
1895 | } | |
76b32999 | 1896 | nfs_fattr_init(&fattr); |
1da177e4 LT |
1897 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
1898 | if (!status) { | |
1899 | entry->mask = 0; | |
1900 | if (res.access & NFS4_ACCESS_READ) | |
1901 | entry->mask |= MAY_READ; | |
1902 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1903 | entry->mask |= MAY_WRITE; | |
1904 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1905 | entry->mask |= MAY_EXEC; | |
76b32999 | 1906 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
1907 | } |
1908 | return status; | |
1909 | } | |
1910 | ||
1911 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1912 | { | |
1913 | struct nfs4_exception exception = { }; | |
1914 | int err; | |
1915 | do { | |
1916 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1917 | _nfs4_proc_access(inode, entry), | |
1918 | &exception); | |
1919 | } while (exception.retry); | |
1920 | return err; | |
1921 | } | |
1922 | ||
1923 | /* | |
1924 | * TODO: For the time being, we don't try to get any attributes | |
1925 | * along with any of the zero-copy operations READ, READDIR, | |
1926 | * READLINK, WRITE. | |
1927 | * | |
1928 | * In the case of the first three, we want to put the GETATTR | |
1929 | * after the read-type operation -- this is because it is hard | |
1930 | * to predict the length of a GETATTR response in v4, and thus | |
1931 | * align the READ data correctly. This means that the GETATTR | |
1932 | * may end up partially falling into the page cache, and we should | |
1933 | * shift it into the 'tail' of the xdr_buf before processing. | |
1934 | * To do this efficiently, we need to know the total length | |
1935 | * of data received, which doesn't seem to be available outside | |
1936 | * of the RPC layer. | |
1937 | * | |
1938 | * In the case of WRITE, we also want to put the GETATTR after | |
1939 | * the operation -- in this case because we want to make sure | |
1940 | * we get the post-operation mtime and size. This means that | |
1941 | * we can't use xdr_encode_pages() as written: we need a variant | |
1942 | * of it which would leave room in the 'tail' iovec. | |
1943 | * | |
1944 | * Both of these changes to the XDR layer would in fact be quite | |
1945 | * minor, but I decided to leave them for a subsequent patch. | |
1946 | */ | |
1947 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1948 | unsigned int pgbase, unsigned int pglen) | |
1949 | { | |
1950 | struct nfs4_readlink args = { | |
1951 | .fh = NFS_FH(inode), | |
1952 | .pgbase = pgbase, | |
1953 | .pglen = pglen, | |
1954 | .pages = &page, | |
1955 | }; | |
1956 | struct rpc_message msg = { | |
1957 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1958 | .rpc_argp = &args, | |
1959 | .rpc_resp = NULL, | |
1960 | }; | |
1961 | ||
1962 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1963 | } | |
1964 | ||
1965 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1966 | unsigned int pgbase, unsigned int pglen) | |
1967 | { | |
1968 | struct nfs4_exception exception = { }; | |
1969 | int err; | |
1970 | do { | |
1971 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1972 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1973 | &exception); | |
1974 | } while (exception.retry); | |
1975 | return err; | |
1976 | } | |
1977 | ||
1da177e4 LT |
1978 | /* |
1979 | * Got race? | |
1980 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1981 | * Until then, this create/open method is prone to inefficiency and race | |
1982 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1983 | * placed on the wire. | |
1984 | * | |
1985 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1986 | * The file will be opened again in the subsequent VFS open call | |
1987 | * (nfs4_proc_file_open). | |
1988 | * | |
1989 | * The open for read will just hang around to be used by any process that | |
1990 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1991 | */ | |
1992 | ||
1993 | static int | |
1994 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 1995 | int flags, struct nameidata *nd) |
1da177e4 | 1996 | { |
ad389da7 | 1997 | struct path path = { |
4ac91378 | 1998 | .mnt = nd->path.mnt, |
ad389da7 TM |
1999 | .dentry = dentry, |
2000 | }; | |
1da177e4 LT |
2001 | struct nfs4_state *state; |
2002 | struct rpc_cred *cred; | |
dc0b027d | 2003 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2004 | int status = 0; |
2005 | ||
98a8e323 | 2006 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2007 | if (IS_ERR(cred)) { |
2008 | status = PTR_ERR(cred); | |
2009 | goto out; | |
2010 | } | |
dc0b027d | 2011 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2012 | d_drop(dentry); |
1da177e4 LT |
2013 | if (IS_ERR(state)) { |
2014 | status = PTR_ERR(state); | |
659bfcd6 | 2015 | goto out_putcred; |
1da177e4 | 2016 | } |
d4d9cdcb | 2017 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2018 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2019 | if (flags & O_EXCL) { |
2020 | struct nfs_fattr fattr; | |
659bfcd6 | 2021 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2022 | if (status == 0) |
65e4308d | 2023 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2024 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2025 | } |
ad389da7 | 2026 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2027 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2028 | else |
dc0b027d | 2029 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2030 | out_putcred: |
2031 | put_rpccred(cred); | |
1da177e4 LT |
2032 | out: |
2033 | return status; | |
2034 | } | |
2035 | ||
2036 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2037 | { | |
16e42959 | 2038 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2039 | struct nfs_removeargs args = { |
1da177e4 | 2040 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2041 | .name.len = name->len, |
2042 | .name.name = name->name, | |
16e42959 TM |
2043 | .bitmask = server->attr_bitmask, |
2044 | }; | |
4fdc17b2 | 2045 | struct nfs_removeres res = { |
16e42959 | 2046 | .server = server, |
1da177e4 | 2047 | }; |
1da177e4 | 2048 | struct rpc_message msg = { |
4fdc17b2 TM |
2049 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2050 | .rpc_argp = &args, | |
2051 | .rpc_resp = &res, | |
1da177e4 LT |
2052 | }; |
2053 | int status; | |
2054 | ||
4fdc17b2 | 2055 | nfs_fattr_init(&res.dir_attr); |
16e42959 TM |
2056 | status = rpc_call_sync(server->client, &msg, 0); |
2057 | if (status == 0) { | |
2058 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2059 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2060 | } |
1da177e4 LT |
2061 | return status; |
2062 | } | |
2063 | ||
2064 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2065 | { | |
2066 | struct nfs4_exception exception = { }; | |
2067 | int err; | |
2068 | do { | |
2069 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2070 | _nfs4_proc_remove(dir, name), | |
2071 | &exception); | |
2072 | } while (exception.retry); | |
2073 | return err; | |
2074 | } | |
2075 | ||
e4eff1a6 | 2076 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2077 | { |
e4eff1a6 TM |
2078 | struct nfs_server *server = NFS_SERVER(dir); |
2079 | struct nfs_removeargs *args = msg->rpc_argp; | |
2080 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2081 | |
e4eff1a6 TM |
2082 | args->bitmask = server->attr_bitmask; |
2083 | res->server = server; | |
1da177e4 | 2084 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2085 | } |
2086 | ||
e4eff1a6 | 2087 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2088 | { |
e4eff1a6 TM |
2089 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2090 | ||
9e33bed5 | 2091 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2092 | return 0; |
2093 | update_changeattr(dir, &res->cinfo); | |
2094 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2095 | return 1; | |
1da177e4 LT |
2096 | } |
2097 | ||
2098 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2099 | struct inode *new_dir, struct qstr *new_name) | |
2100 | { | |
6caf2c82 | 2101 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2102 | struct nfs4_rename_arg arg = { |
2103 | .old_dir = NFS_FH(old_dir), | |
2104 | .new_dir = NFS_FH(new_dir), | |
2105 | .old_name = old_name, | |
2106 | .new_name = new_name, | |
6caf2c82 TM |
2107 | .bitmask = server->attr_bitmask, |
2108 | }; | |
2109 | struct nfs_fattr old_fattr, new_fattr; | |
2110 | struct nfs4_rename_res res = { | |
2111 | .server = server, | |
2112 | .old_fattr = &old_fattr, | |
2113 | .new_fattr = &new_fattr, | |
1da177e4 | 2114 | }; |
1da177e4 LT |
2115 | struct rpc_message msg = { |
2116 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2117 | .rpc_argp = &arg, | |
2118 | .rpc_resp = &res, | |
2119 | }; | |
2120 | int status; | |
2121 | ||
6caf2c82 TM |
2122 | nfs_fattr_init(res.old_fattr); |
2123 | nfs_fattr_init(res.new_fattr); | |
2124 | status = rpc_call_sync(server->client, &msg, 0); | |
1da177e4 LT |
2125 | |
2126 | if (!status) { | |
2127 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2128 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2129 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2130 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2131 | } |
2132 | return status; | |
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 | { | |
2138 | struct nfs4_exception exception = { }; | |
2139 | int err; | |
2140 | do { | |
2141 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2142 | _nfs4_proc_rename(old_dir, old_name, | |
2143 | new_dir, new_name), | |
2144 | &exception); | |
2145 | } while (exception.retry); | |
2146 | return err; | |
2147 | } | |
2148 | ||
2149 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2150 | { | |
91ba2eee | 2151 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2152 | struct nfs4_link_arg arg = { |
2153 | .fh = NFS_FH(inode), | |
2154 | .dir_fh = NFS_FH(dir), | |
2155 | .name = name, | |
91ba2eee TM |
2156 | .bitmask = server->attr_bitmask, |
2157 | }; | |
2158 | struct nfs_fattr fattr, dir_attr; | |
2159 | struct nfs4_link_res res = { | |
2160 | .server = server, | |
2161 | .fattr = &fattr, | |
2162 | .dir_attr = &dir_attr, | |
1da177e4 | 2163 | }; |
1da177e4 LT |
2164 | struct rpc_message msg = { |
2165 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2166 | .rpc_argp = &arg, | |
91ba2eee | 2167 | .rpc_resp = &res, |
1da177e4 LT |
2168 | }; |
2169 | int status; | |
2170 | ||
91ba2eee TM |
2171 | nfs_fattr_init(res.fattr); |
2172 | nfs_fattr_init(res.dir_attr); | |
2173 | status = rpc_call_sync(server->client, &msg, 0); | |
2174 | if (!status) { | |
2175 | update_changeattr(dir, &res.cinfo); | |
2176 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2177 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2178 | } |
1da177e4 LT |
2179 | |
2180 | return status; | |
2181 | } | |
2182 | ||
2183 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2184 | { | |
2185 | struct nfs4_exception exception = { }; | |
2186 | int err; | |
2187 | do { | |
2188 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2189 | _nfs4_proc_link(inode, dir, name), | |
2190 | &exception); | |
2191 | } while (exception.retry); | |
2192 | return err; | |
2193 | } | |
2194 | ||
57dc9a57 TM |
2195 | struct nfs4_createdata { |
2196 | struct rpc_message msg; | |
2197 | struct nfs4_create_arg arg; | |
2198 | struct nfs4_create_res res; | |
2199 | struct nfs_fh fh; | |
2200 | struct nfs_fattr fattr; | |
2201 | struct nfs_fattr dir_fattr; | |
2202 | }; | |
2203 | ||
2204 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2205 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2206 | { | |
2207 | struct nfs4_createdata *data; | |
2208 | ||
2209 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2210 | if (data != NULL) { | |
2211 | struct nfs_server *server = NFS_SERVER(dir); | |
2212 | ||
2213 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2214 | data->msg.rpc_argp = &data->arg; | |
2215 | data->msg.rpc_resp = &data->res; | |
2216 | data->arg.dir_fh = NFS_FH(dir); | |
2217 | data->arg.server = server; | |
2218 | data->arg.name = name; | |
2219 | data->arg.attrs = sattr; | |
2220 | data->arg.ftype = ftype; | |
2221 | data->arg.bitmask = server->attr_bitmask; | |
2222 | data->res.server = server; | |
2223 | data->res.fh = &data->fh; | |
2224 | data->res.fattr = &data->fattr; | |
2225 | data->res.dir_fattr = &data->dir_fattr; | |
2226 | nfs_fattr_init(data->res.fattr); | |
2227 | nfs_fattr_init(data->res.dir_fattr); | |
2228 | } | |
2229 | return data; | |
2230 | } | |
2231 | ||
2232 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2233 | { | |
2234 | int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); | |
2235 | if (status == 0) { | |
2236 | update_changeattr(dir, &data->res.dir_cinfo); | |
2237 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2238 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2239 | } | |
2240 | return status; | |
2241 | } | |
2242 | ||
2243 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2244 | { | |
2245 | kfree(data); | |
2246 | } | |
2247 | ||
4f390c15 | 2248 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2249 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2250 | { |
57dc9a57 TM |
2251 | struct nfs4_createdata *data; |
2252 | int status = -ENAMETOOLONG; | |
1da177e4 | 2253 | |
94a6d753 | 2254 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2255 | goto out; |
4f390c15 | 2256 | |
57dc9a57 TM |
2257 | status = -ENOMEM; |
2258 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2259 | if (data == NULL) | |
2260 | goto out; | |
2261 | ||
2262 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2263 | data->arg.u.symlink.pages = &page; | |
2264 | data->arg.u.symlink.len = len; | |
1da177e4 | 2265 | |
57dc9a57 TM |
2266 | status = nfs4_do_create(dir, dentry, data); |
2267 | ||
2268 | nfs4_free_createdata(data); | |
2269 | out: | |
1da177e4 LT |
2270 | return status; |
2271 | } | |
2272 | ||
4f390c15 | 2273 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2274 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2275 | { |
2276 | struct nfs4_exception exception = { }; | |
2277 | int err; | |
2278 | do { | |
2279 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2280 | _nfs4_proc_symlink(dir, dentry, page, |
2281 | len, sattr), | |
1da177e4 LT |
2282 | &exception); |
2283 | } while (exception.retry); | |
2284 | return err; | |
2285 | } | |
2286 | ||
2287 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2288 | struct iattr *sattr) | |
2289 | { | |
57dc9a57 TM |
2290 | struct nfs4_createdata *data; |
2291 | int status = -ENOMEM; | |
1da177e4 | 2292 | |
57dc9a57 TM |
2293 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2294 | if (data == NULL) | |
2295 | goto out; | |
2296 | ||
2297 | status = nfs4_do_create(dir, dentry, data); | |
2298 | ||
2299 | nfs4_free_createdata(data); | |
2300 | out: | |
1da177e4 LT |
2301 | return status; |
2302 | } | |
2303 | ||
2304 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2305 | struct iattr *sattr) | |
2306 | { | |
2307 | struct nfs4_exception exception = { }; | |
2308 | int err; | |
2309 | do { | |
2310 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2311 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2312 | &exception); | |
2313 | } while (exception.retry); | |
2314 | return err; | |
2315 | } | |
2316 | ||
2317 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2318 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2319 | { | |
2320 | struct inode *dir = dentry->d_inode; | |
2321 | struct nfs4_readdir_arg args = { | |
2322 | .fh = NFS_FH(dir), | |
2323 | .pages = &page, | |
2324 | .pgbase = 0, | |
2325 | .count = count, | |
2326 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
2327 | }; | |
2328 | struct nfs4_readdir_res res; | |
2329 | struct rpc_message msg = { | |
2330 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2331 | .rpc_argp = &args, | |
2332 | .rpc_resp = &res, | |
2333 | .rpc_cred = cred, | |
2334 | }; | |
2335 | int status; | |
2336 | ||
3110ff80 | 2337 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2338 | dentry->d_parent->d_name.name, |
2339 | dentry->d_name.name, | |
2340 | (unsigned long long)cookie); | |
1da177e4 LT |
2341 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2342 | res.pgbase = args.pgbase; | |
2343 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2344 | if (status == 0) | |
2345 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2346 | |
2347 | nfs_invalidate_atime(dir); | |
2348 | ||
3110ff80 | 2349 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2350 | return status; |
2351 | } | |
2352 | ||
2353 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2354 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2355 | { | |
2356 | struct nfs4_exception exception = { }; | |
2357 | int err; | |
2358 | do { | |
2359 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2360 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2361 | page, count, plus), | |
2362 | &exception); | |
2363 | } while (exception.retry); | |
2364 | return err; | |
2365 | } | |
2366 | ||
2367 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2368 | struct iattr *sattr, dev_t rdev) | |
2369 | { | |
57dc9a57 TM |
2370 | struct nfs4_createdata *data; |
2371 | int mode = sattr->ia_mode; | |
2372 | int status = -ENOMEM; | |
1da177e4 LT |
2373 | |
2374 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2375 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2376 | |
2377 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2378 | if (data == NULL) | |
2379 | goto out; | |
2380 | ||
1da177e4 | 2381 | if (S_ISFIFO(mode)) |
57dc9a57 | 2382 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2383 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2384 | data->arg.ftype = NF4BLK; |
2385 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2386 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2387 | } |
2388 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2389 | data->arg.ftype = NF4CHR; |
2390 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2391 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2392 | } |
1da177e4 | 2393 | |
57dc9a57 TM |
2394 | status = nfs4_do_create(dir, dentry, data); |
2395 | ||
2396 | nfs4_free_createdata(data); | |
2397 | out: | |
1da177e4 LT |
2398 | return status; |
2399 | } | |
2400 | ||
2401 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2402 | struct iattr *sattr, dev_t rdev) | |
2403 | { | |
2404 | struct nfs4_exception exception = { }; | |
2405 | int err; | |
2406 | do { | |
2407 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2408 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2409 | &exception); | |
2410 | } while (exception.retry); | |
2411 | return err; | |
2412 | } | |
2413 | ||
2414 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2415 | struct nfs_fsstat *fsstat) | |
2416 | { | |
2417 | struct nfs4_statfs_arg args = { | |
2418 | .fh = fhandle, | |
2419 | .bitmask = server->attr_bitmask, | |
2420 | }; | |
2421 | struct rpc_message msg = { | |
2422 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2423 | .rpc_argp = &args, | |
2424 | .rpc_resp = fsstat, | |
2425 | }; | |
2426 | ||
0e574af1 | 2427 | nfs_fattr_init(fsstat->fattr); |
1da177e4 LT |
2428 | return rpc_call_sync(server->client, &msg, 0); |
2429 | } | |
2430 | ||
2431 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2432 | { | |
2433 | struct nfs4_exception exception = { }; | |
2434 | int err; | |
2435 | do { | |
2436 | err = nfs4_handle_exception(server, | |
2437 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2438 | &exception); | |
2439 | } while (exception.retry); | |
2440 | return err; | |
2441 | } | |
2442 | ||
2443 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2444 | struct nfs_fsinfo *fsinfo) | |
2445 | { | |
2446 | struct nfs4_fsinfo_arg args = { | |
2447 | .fh = fhandle, | |
2448 | .bitmask = server->attr_bitmask, | |
2449 | }; | |
2450 | struct rpc_message msg = { | |
2451 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2452 | .rpc_argp = &args, | |
2453 | .rpc_resp = fsinfo, | |
2454 | }; | |
2455 | ||
2456 | return rpc_call_sync(server->client, &msg, 0); | |
2457 | } | |
2458 | ||
2459 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2460 | { | |
2461 | struct nfs4_exception exception = { }; | |
2462 | int err; | |
2463 | ||
2464 | do { | |
2465 | err = nfs4_handle_exception(server, | |
2466 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2467 | &exception); | |
2468 | } while (exception.retry); | |
2469 | return err; | |
2470 | } | |
2471 | ||
2472 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2473 | { | |
0e574af1 | 2474 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2475 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2476 | } | |
2477 | ||
2478 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2479 | struct nfs_pathconf *pathconf) | |
2480 | { | |
2481 | struct nfs4_pathconf_arg args = { | |
2482 | .fh = fhandle, | |
2483 | .bitmask = server->attr_bitmask, | |
2484 | }; | |
2485 | struct rpc_message msg = { | |
2486 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2487 | .rpc_argp = &args, | |
2488 | .rpc_resp = pathconf, | |
2489 | }; | |
2490 | ||
2491 | /* None of the pathconf attributes are mandatory to implement */ | |
2492 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2493 | memset(pathconf, 0, sizeof(*pathconf)); | |
2494 | return 0; | |
2495 | } | |
2496 | ||
0e574af1 | 2497 | nfs_fattr_init(pathconf->fattr); |
1da177e4 LT |
2498 | return rpc_call_sync(server->client, &msg, 0); |
2499 | } | |
2500 | ||
2501 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2502 | struct nfs_pathconf *pathconf) | |
2503 | { | |
2504 | struct nfs4_exception exception = { }; | |
2505 | int err; | |
2506 | ||
2507 | do { | |
2508 | err = nfs4_handle_exception(server, | |
2509 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2510 | &exception); | |
2511 | } while (exception.retry); | |
2512 | return err; | |
2513 | } | |
2514 | ||
ec06c096 | 2515 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2516 | { |
ec06c096 | 2517 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2518 | |
9e33bed5 | 2519 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
1da177e4 | 2520 | rpc_restart_call(task); |
ec06c096 | 2521 | return -EAGAIN; |
1da177e4 | 2522 | } |
8850df99 TM |
2523 | |
2524 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 2525 | if (task->tk_status > 0) |
ec06c096 TM |
2526 | renew_lease(server, data->timestamp); |
2527 | return 0; | |
1da177e4 LT |
2528 | } |
2529 | ||
bdc7f021 | 2530 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 2531 | { |
1da177e4 | 2532 | data->timestamp = jiffies; |
bdc7f021 | 2533 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
2534 | } |
2535 | ||
788e7a89 | 2536 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2537 | { |
1da177e4 LT |
2538 | struct inode *inode = data->inode; |
2539 | ||
9e33bed5 | 2540 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
1da177e4 | 2541 | rpc_restart_call(task); |
788e7a89 | 2542 | return -EAGAIN; |
1da177e4 | 2543 | } |
4f9838c7 | 2544 | if (task->tk_status >= 0) { |
1da177e4 | 2545 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 2546 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 2547 | } |
788e7a89 | 2548 | return 0; |
1da177e4 LT |
2549 | } |
2550 | ||
bdc7f021 | 2551 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2552 | { |
bdc7f021 TM |
2553 | struct nfs_server *server = NFS_SERVER(data->inode); |
2554 | ||
4f9838c7 TM |
2555 | data->args.bitmask = server->attr_bitmask; |
2556 | data->res.server = server; | |
1da177e4 LT |
2557 | data->timestamp = jiffies; |
2558 | ||
bdc7f021 | 2559 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
2560 | } |
2561 | ||
788e7a89 | 2562 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2563 | { |
1da177e4 LT |
2564 | struct inode *inode = data->inode; |
2565 | ||
9e33bed5 | 2566 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
1da177e4 | 2567 | rpc_restart_call(task); |
788e7a89 | 2568 | return -EAGAIN; |
1da177e4 | 2569 | } |
9e08a3c5 | 2570 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 2571 | return 0; |
1da177e4 LT |
2572 | } |
2573 | ||
bdc7f021 | 2574 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2575 | { |
788e7a89 | 2576 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2577 | |
4f9838c7 TM |
2578 | data->args.bitmask = server->attr_bitmask; |
2579 | data->res.server = server; | |
bdc7f021 | 2580 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
2581 | } |
2582 | ||
2583 | /* | |
2584 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2585 | * standalone procedure for queueing an asynchronous RENEW. | |
2586 | */ | |
963d8fe5 | 2587 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2588 | { |
adfa6f98 | 2589 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2590 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2591 | |
2592 | if (task->tk_status < 0) { | |
2593 | switch (task->tk_status) { | |
2594 | case -NFS4ERR_STALE_CLIENTID: | |
2595 | case -NFS4ERR_EXPIRED: | |
2596 | case -NFS4ERR_CB_PATH_DOWN: | |
2597 | nfs4_schedule_state_recovery(clp); | |
2598 | } | |
2599 | return; | |
2600 | } | |
2601 | spin_lock(&clp->cl_lock); | |
2602 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2603 | clp->cl_last_renewal = timestamp; | |
2604 | spin_unlock(&clp->cl_lock); | |
2605 | } | |
2606 | ||
963d8fe5 TM |
2607 | static const struct rpc_call_ops nfs4_renew_ops = { |
2608 | .rpc_call_done = nfs4_renew_done, | |
2609 | }; | |
2610 | ||
adfa6f98 | 2611 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2612 | { |
2613 | struct rpc_message msg = { | |
2614 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2615 | .rpc_argp = clp, | |
b4454fe1 | 2616 | .rpc_cred = cred, |
1da177e4 LT |
2617 | }; |
2618 | ||
2619 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2620 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2621 | } |
2622 | ||
adfa6f98 | 2623 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2624 | { |
2625 | struct rpc_message msg = { | |
2626 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2627 | .rpc_argp = clp, | |
b4454fe1 | 2628 | .rpc_cred = cred, |
1da177e4 LT |
2629 | }; |
2630 | unsigned long now = jiffies; | |
2631 | int status; | |
2632 | ||
2633 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2634 | if (status < 0) | |
2635 | return status; | |
2636 | spin_lock(&clp->cl_lock); | |
2637 | if (time_before(clp->cl_last_renewal,now)) | |
2638 | clp->cl_last_renewal = now; | |
2639 | spin_unlock(&clp->cl_lock); | |
2640 | return 0; | |
2641 | } | |
2642 | ||
aa1870af BF |
2643 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2644 | { | |
2645 | return (server->caps & NFS_CAP_ACLS) | |
2646 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2647 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2648 | } | |
2649 | ||
2650 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2651 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2652 | * the stack. | |
2653 | */ | |
2654 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2655 | ||
2656 | static void buf_to_pages(const void *buf, size_t buflen, | |
2657 | struct page **pages, unsigned int *pgbase) | |
2658 | { | |
2659 | const void *p = buf; | |
2660 | ||
2661 | *pgbase = offset_in_page(buf); | |
2662 | p -= *pgbase; | |
2663 | while (p < buf + buflen) { | |
2664 | *(pages++) = virt_to_page(p); | |
2665 | p += PAGE_CACHE_SIZE; | |
2666 | } | |
2667 | } | |
2668 | ||
e50a1c2e BF |
2669 | struct nfs4_cached_acl { |
2670 | int cached; | |
2671 | size_t len; | |
3e9d4154 | 2672 | char data[0]; |
e50a1c2e BF |
2673 | }; |
2674 | ||
2675 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2676 | { | |
2677 | struct nfs_inode *nfsi = NFS_I(inode); | |
2678 | ||
2679 | spin_lock(&inode->i_lock); | |
2680 | kfree(nfsi->nfs4_acl); | |
2681 | nfsi->nfs4_acl = acl; | |
2682 | spin_unlock(&inode->i_lock); | |
2683 | } | |
2684 | ||
2685 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2686 | { | |
2687 | nfs4_set_cached_acl(inode, NULL); | |
2688 | } | |
2689 | ||
2690 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2691 | { | |
2692 | struct nfs_inode *nfsi = NFS_I(inode); | |
2693 | struct nfs4_cached_acl *acl; | |
2694 | int ret = -ENOENT; | |
2695 | ||
2696 | spin_lock(&inode->i_lock); | |
2697 | acl = nfsi->nfs4_acl; | |
2698 | if (acl == NULL) | |
2699 | goto out; | |
2700 | if (buf == NULL) /* user is just asking for length */ | |
2701 | goto out_len; | |
2702 | if (acl->cached == 0) | |
2703 | goto out; | |
2704 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2705 | if (acl->len > buflen) | |
2706 | goto out; | |
2707 | memcpy(buf, acl->data, acl->len); | |
2708 | out_len: | |
2709 | ret = acl->len; | |
2710 | out: | |
2711 | spin_unlock(&inode->i_lock); | |
2712 | return ret; | |
2713 | } | |
2714 | ||
2715 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2716 | { | |
2717 | struct nfs4_cached_acl *acl; | |
2718 | ||
2719 | if (buf && acl_len <= PAGE_SIZE) { | |
2720 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2721 | if (acl == NULL) | |
2722 | goto out; | |
2723 | acl->cached = 1; | |
2724 | memcpy(acl->data, buf, acl_len); | |
2725 | } else { | |
2726 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2727 | if (acl == NULL) | |
2728 | goto out; | |
2729 | acl->cached = 0; | |
2730 | } | |
2731 | acl->len = acl_len; | |
2732 | out: | |
2733 | nfs4_set_cached_acl(inode, acl); | |
2734 | } | |
2735 | ||
16b4289c | 2736 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 2737 | { |
aa1870af BF |
2738 | struct page *pages[NFS4ACL_MAXPAGES]; |
2739 | struct nfs_getaclargs args = { | |
2740 | .fh = NFS_FH(inode), | |
2741 | .acl_pages = pages, | |
2742 | .acl_len = buflen, | |
2743 | }; | |
2744 | size_t resp_len = buflen; | |
e50a1c2e | 2745 | void *resp_buf; |
aa1870af BF |
2746 | struct rpc_message msg = { |
2747 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2748 | .rpc_argp = &args, | |
2749 | .rpc_resp = &resp_len, | |
2750 | }; | |
e50a1c2e | 2751 | struct page *localpage = NULL; |
aa1870af BF |
2752 | int ret; |
2753 | ||
e50a1c2e BF |
2754 | if (buflen < PAGE_SIZE) { |
2755 | /* As long as we're doing a round trip to the server anyway, | |
2756 | * let's be prepared for a page of acl data. */ | |
2757 | localpage = alloc_page(GFP_KERNEL); | |
2758 | resp_buf = page_address(localpage); | |
2759 | if (localpage == NULL) | |
2760 | return -ENOMEM; | |
2761 | args.acl_pages[0] = localpage; | |
2762 | args.acl_pgbase = 0; | |
1d95db8e | 2763 | resp_len = args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2764 | } else { |
2765 | resp_buf = buf; | |
2766 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2767 | } | |
aa1870af | 2768 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2769 | if (ret) |
2770 | goto out_free; | |
2771 | if (resp_len > args.acl_len) | |
2772 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2773 | else | |
2774 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2775 | if (buf) { | |
2776 | ret = -ERANGE; | |
2777 | if (resp_len > buflen) | |
2778 | goto out_free; | |
2779 | if (localpage) | |
2780 | memcpy(buf, resp_buf, resp_len); | |
2781 | } | |
2782 | ret = resp_len; | |
2783 | out_free: | |
2784 | if (localpage) | |
2785 | __free_page(localpage); | |
aa1870af BF |
2786 | return ret; |
2787 | } | |
2788 | ||
16b4289c TM |
2789 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
2790 | { | |
2791 | struct nfs4_exception exception = { }; | |
2792 | ssize_t ret; | |
2793 | do { | |
2794 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
2795 | if (ret >= 0) | |
2796 | break; | |
2797 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
2798 | } while (exception.retry); | |
2799 | return ret; | |
2800 | } | |
2801 | ||
e50a1c2e BF |
2802 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2803 | { | |
2804 | struct nfs_server *server = NFS_SERVER(inode); | |
2805 | int ret; | |
2806 | ||
2807 | if (!nfs4_server_supports_acls(server)) | |
2808 | return -EOPNOTSUPP; | |
2809 | ret = nfs_revalidate_inode(server, inode); | |
2810 | if (ret < 0) | |
2811 | return ret; | |
f41f7418 TM |
2812 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
2813 | nfs_zap_acl_cache(inode); | |
e50a1c2e BF |
2814 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
2815 | if (ret != -ENOENT) | |
2816 | return ret; | |
2817 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2818 | } | |
2819 | ||
16b4289c | 2820 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
2821 | { |
2822 | struct nfs_server *server = NFS_SERVER(inode); | |
2823 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2824 | struct nfs_setaclargs arg = { | |
2825 | .fh = NFS_FH(inode), | |
2826 | .acl_pages = pages, | |
2827 | .acl_len = buflen, | |
2828 | }; | |
2829 | struct rpc_message msg = { | |
2830 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2831 | .rpc_argp = &arg, | |
2832 | .rpc_resp = NULL, | |
2833 | }; | |
2834 | int ret; | |
2835 | ||
2836 | if (!nfs4_server_supports_acls(server)) | |
2837 | return -EOPNOTSUPP; | |
642ac549 | 2838 | nfs_inode_return_delegation(inode); |
4b580ee3 | 2839 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
1f163415 | 2840 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
f41f7418 TM |
2841 | nfs_access_zap_cache(inode); |
2842 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
2843 | return ret; |
2844 | } | |
2845 | ||
16b4289c TM |
2846 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2847 | { | |
2848 | struct nfs4_exception exception = { }; | |
2849 | int err; | |
2850 | do { | |
2851 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2852 | __nfs4_proc_set_acl(inode, buf, buflen), | |
2853 | &exception); | |
2854 | } while (exception.retry); | |
2855 | return err; | |
2856 | } | |
2857 | ||
1da177e4 | 2858 | static int |
9e33bed5 | 2859 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 2860 | { |
7539bbab | 2861 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2862 | |
2863 | if (!clp || task->tk_status >= 0) | |
2864 | return 0; | |
2865 | switch(task->tk_status) { | |
9e33bed5 TM |
2866 | case -NFS4ERR_ADMIN_REVOKED: |
2867 | case -NFS4ERR_BAD_STATEID: | |
2868 | case -NFS4ERR_OPENMODE: | |
2869 | if (state == NULL) | |
2870 | break; | |
2871 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1da177e4 LT |
2872 | case -NFS4ERR_STALE_CLIENTID: |
2873 | case -NFS4ERR_STALE_STATEID: | |
2874 | case -NFS4ERR_EXPIRED: | |
5d00837b | 2875 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
1da177e4 | 2876 | nfs4_schedule_state_recovery(clp); |
e005e804 | 2877 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
fda13939 | 2878 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
1da177e4 LT |
2879 | task->tk_status = 0; |
2880 | return -EAGAIN; | |
1da177e4 | 2881 | case -NFS4ERR_DELAY: |
2e96d286 | 2882 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 2883 | case -NFS4ERR_GRACE: |
1da177e4 LT |
2884 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
2885 | task->tk_status = 0; | |
2886 | return -EAGAIN; | |
2887 | case -NFS4ERR_OLD_STATEID: | |
2888 | task->tk_status = 0; | |
2889 | return -EAGAIN; | |
2890 | } | |
2891 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2892 | return 0; | |
2893 | } | |
2894 | ||
adfa6f98 | 2895 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
2896 | { |
2897 | nfs4_verifier sc_verifier; | |
2898 | struct nfs4_setclientid setclientid = { | |
2899 | .sc_verifier = &sc_verifier, | |
2900 | .sc_prog = program, | |
2901 | }; | |
2902 | struct rpc_message msg = { | |
2903 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2904 | .rpc_argp = &setclientid, | |
2905 | .rpc_resp = clp, | |
286d7d6a | 2906 | .rpc_cred = cred, |
1da177e4 | 2907 | }; |
bc4785cd | 2908 | __be32 *p; |
1da177e4 LT |
2909 | int loop = 0; |
2910 | int status; | |
2911 | ||
bc4785cd | 2912 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
2913 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
2914 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2915 | ||
2916 | for(;;) { | |
2917 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 2918 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
2919 | clp->cl_ipaddr, |
2920 | rpc_peeraddr2str(clp->cl_rpcclient, | |
2921 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
2922 | rpc_peeraddr2str(clp->cl_rpcclient, |
2923 | RPC_DISPLAY_PROTO), | |
78ea323b | 2924 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
2925 | clp->cl_id_uniquifier); |
2926 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
2927 | sizeof(setclientid.sc_netid), |
2928 | rpc_peeraddr2str(clp->cl_rpcclient, | |
2929 | RPC_DISPLAY_NETID)); | |
1da177e4 | 2930 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 2931 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
2932 | clp->cl_ipaddr, port >> 8, port & 255); |
2933 | ||
2934 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2935 | if (status != -NFS4ERR_CLID_INUSE) | |
2936 | break; | |
2937 | if (signalled()) | |
2938 | break; | |
2939 | if (loop++ & 1) | |
2940 | ssleep(clp->cl_lease_time + 1); | |
2941 | else | |
2942 | if (++clp->cl_id_uniquifier == 0) | |
2943 | break; | |
2944 | } | |
2945 | return status; | |
2946 | } | |
2947 | ||
adfa6f98 | 2948 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2949 | { |
2950 | struct nfs_fsinfo fsinfo; | |
2951 | struct rpc_message msg = { | |
2952 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2953 | .rpc_argp = clp, | |
2954 | .rpc_resp = &fsinfo, | |
286d7d6a | 2955 | .rpc_cred = cred, |
1da177e4 LT |
2956 | }; |
2957 | unsigned long now; | |
2958 | int status; | |
2959 | ||
2960 | now = jiffies; | |
2961 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2962 | if (status == 0) { | |
2963 | spin_lock(&clp->cl_lock); | |
2964 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2965 | clp->cl_last_renewal = now; | |
2966 | spin_unlock(&clp->cl_lock); | |
2967 | } | |
2968 | return status; | |
2969 | } | |
2970 | ||
adfa6f98 | 2971 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 2972 | { |
77e03677 | 2973 | long timeout = 0; |
51581f3b TM |
2974 | int err; |
2975 | do { | |
2976 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
2977 | switch (err) { | |
2978 | case 0: | |
2979 | return err; | |
2980 | case -NFS4ERR_RESOURCE: | |
2981 | /* The IBM lawyers misread another document! */ | |
2982 | case -NFS4ERR_DELAY: | |
2983 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
2984 | } | |
2985 | } while (err == 0); | |
2986 | return err; | |
2987 | } | |
2988 | ||
fe650407 TM |
2989 | struct nfs4_delegreturndata { |
2990 | struct nfs4_delegreturnargs args; | |
fa178f29 | 2991 | struct nfs4_delegreturnres res; |
fe650407 TM |
2992 | struct nfs_fh fh; |
2993 | nfs4_stateid stateid; | |
26e976a8 | 2994 | unsigned long timestamp; |
fa178f29 | 2995 | struct nfs_fattr fattr; |
fe650407 TM |
2996 | int rpc_status; |
2997 | }; | |
2998 | ||
fe650407 TM |
2999 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3000 | { | |
3001 | struct nfs4_delegreturndata *data = calldata; | |
3002 | data->rpc_status = task->tk_status; | |
26e976a8 | 3003 | if (data->rpc_status == 0) |
fa178f29 | 3004 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
3005 | } |
3006 | ||
3007 | static void nfs4_delegreturn_release(void *calldata) | |
3008 | { | |
fe650407 TM |
3009 | kfree(calldata); |
3010 | } | |
3011 | ||
c8d149f3 | 3012 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
fe650407 TM |
3013 | .rpc_call_done = nfs4_delegreturn_done, |
3014 | .rpc_release = nfs4_delegreturn_release, | |
3015 | }; | |
3016 | ||
e6f81075 | 3017 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3018 | { |
3019 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3020 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3021 | struct rpc_task *task; |
5138fde0 TM |
3022 | struct rpc_message msg = { |
3023 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3024 | .rpc_cred = cred, | |
3025 | }; | |
c970aa85 TM |
3026 | struct rpc_task_setup task_setup_data = { |
3027 | .rpc_client = server->client, | |
5138fde0 | 3028 | .rpc_message = &msg, |
c970aa85 TM |
3029 | .callback_ops = &nfs4_delegreturn_ops, |
3030 | .flags = RPC_TASK_ASYNC, | |
3031 | }; | |
e6f81075 | 3032 | int status = 0; |
fe650407 TM |
3033 | |
3034 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
3035 | if (data == NULL) | |
3036 | return -ENOMEM; | |
3037 | data->args.fhandle = &data->fh; | |
3038 | data->args.stateid = &data->stateid; | |
fa178f29 | 3039 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3040 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3041 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3042 | data->res.fattr = &data->fattr; |
3043 | data->res.server = server; | |
5138fde0 | 3044 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3045 | data->timestamp = jiffies; |
fe650407 TM |
3046 | data->rpc_status = 0; |
3047 | ||
c970aa85 | 3048 | task_setup_data.callback_data = data; |
5138fde0 TM |
3049 | msg.rpc_argp = &data->args, |
3050 | msg.rpc_resp = &data->res, | |
c970aa85 | 3051 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3052 | if (IS_ERR(task)) |
fe650407 | 3053 | return PTR_ERR(task); |
e6f81075 TM |
3054 | if (!issync) |
3055 | goto out; | |
fe650407 | 3056 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3057 | if (status != 0) |
3058 | goto out; | |
3059 | status = data->rpc_status; | |
3060 | if (status != 0) | |
3061 | goto out; | |
3062 | nfs_refresh_inode(inode, &data->fattr); | |
3063 | out: | |
e6b3c4db | 3064 | rpc_put_task(task); |
fe650407 | 3065 | return status; |
1da177e4 LT |
3066 | } |
3067 | ||
e6f81075 | 3068 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3069 | { |
3070 | struct nfs_server *server = NFS_SERVER(inode); | |
3071 | struct nfs4_exception exception = { }; | |
3072 | int err; | |
3073 | do { | |
e6f81075 | 3074 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3075 | switch (err) { |
3076 | case -NFS4ERR_STALE_STATEID: | |
3077 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3078 | case 0: |
3079 | return 0; | |
3080 | } | |
3081 | err = nfs4_handle_exception(server, err, &exception); | |
3082 | } while (exception.retry); | |
3083 | return err; | |
3084 | } | |
3085 | ||
3086 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3087 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3088 | ||
3089 | /* | |
3090 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3091 | */ | |
3092 | static unsigned long | |
3093 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3094 | { | |
150030b7 | 3095 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3096 | timeout <<= 1; |
3097 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3098 | return NFS4_LOCK_MAXTIMEOUT; | |
3099 | return timeout; | |
3100 | } | |
3101 | ||
1da177e4 LT |
3102 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3103 | { | |
3104 | struct inode *inode = state->inode; | |
3105 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3106 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3107 | struct nfs_lockt_args arg = { |
1da177e4 | 3108 | .fh = NFS_FH(inode), |
911d1aaf | 3109 | .fl = request, |
1da177e4 | 3110 | }; |
911d1aaf TM |
3111 | struct nfs_lockt_res res = { |
3112 | .denied = request, | |
1da177e4 LT |
3113 | }; |
3114 | struct rpc_message msg = { | |
3115 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3116 | .rpc_argp = &arg, | |
3117 | .rpc_resp = &res, | |
3118 | .rpc_cred = state->owner->so_cred, | |
3119 | }; | |
1da177e4 LT |
3120 | struct nfs4_lock_state *lsp; |
3121 | int status; | |
3122 | ||
911d1aaf | 3123 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3124 | status = nfs4_set_lock_state(state, request); |
3125 | if (status != 0) | |
3126 | goto out; | |
3127 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3128 | arg.lock_owner.id = lsp->ls_id.id; |
1da177e4 | 3129 | status = rpc_call_sync(server->client, &msg, 0); |
911d1aaf TM |
3130 | switch (status) { |
3131 | case 0: | |
3132 | request->fl_type = F_UNLCK; | |
3133 | break; | |
3134 | case -NFS4ERR_DENIED: | |
3135 | status = 0; | |
1da177e4 | 3136 | } |
70cc6487 | 3137 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3138 | out: |
1da177e4 LT |
3139 | return status; |
3140 | } | |
3141 | ||
3142 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3143 | { | |
3144 | struct nfs4_exception exception = { }; | |
3145 | int err; | |
3146 | ||
3147 | do { | |
3148 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3149 | _nfs4_proc_getlk(state, cmd, request), | |
3150 | &exception); | |
3151 | } while (exception.retry); | |
3152 | return err; | |
3153 | } | |
3154 | ||
3155 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3156 | { | |
3157 | int res = 0; | |
3158 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3159 | case FL_POSIX: | |
3160 | res = posix_lock_file_wait(file, fl); | |
3161 | break; | |
3162 | case FL_FLOCK: | |
3163 | res = flock_lock_file_wait(file, fl); | |
3164 | break; | |
3165 | default: | |
3166 | BUG(); | |
3167 | } | |
1da177e4 LT |
3168 | return res; |
3169 | } | |
3170 | ||
faf5f49c | 3171 | struct nfs4_unlockdata { |
911d1aaf TM |
3172 | struct nfs_locku_args arg; |
3173 | struct nfs_locku_res res; | |
faf5f49c TM |
3174 | struct nfs4_lock_state *lsp; |
3175 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3176 | struct file_lock fl; |
3177 | const struct nfs_server *server; | |
26e976a8 | 3178 | unsigned long timestamp; |
faf5f49c TM |
3179 | }; |
3180 | ||
911d1aaf TM |
3181 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3182 | struct nfs_open_context *ctx, | |
3183 | struct nfs4_lock_state *lsp, | |
3184 | struct nfs_seqid *seqid) | |
3185 | { | |
3186 | struct nfs4_unlockdata *p; | |
3187 | struct inode *inode = lsp->ls_state->inode; | |
3188 | ||
3189 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3190 | if (p == NULL) | |
3191 | return NULL; | |
3192 | p->arg.fh = NFS_FH(inode); | |
3193 | p->arg.fl = &p->fl; | |
3194 | p->arg.seqid = seqid; | |
c1d51931 | 3195 | p->res.seqid = seqid; |
911d1aaf TM |
3196 | p->arg.stateid = &lsp->ls_stateid; |
3197 | p->lsp = lsp; | |
3198 | atomic_inc(&lsp->ls_count); | |
3199 | /* Ensure we don't close file until we're done freeing locks! */ | |
3200 | p->ctx = get_nfs_open_context(ctx); | |
3201 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3202 | p->server = NFS_SERVER(inode); | |
3203 | return p; | |
3204 | } | |
3205 | ||
06f814a3 | 3206 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3207 | { |
963d8fe5 | 3208 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3209 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3210 | nfs4_put_lock_state(calldata->lsp); |
3211 | put_nfs_open_context(calldata->ctx); | |
3212 | kfree(calldata); | |
faf5f49c TM |
3213 | } |
3214 | ||
963d8fe5 | 3215 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3216 | { |
963d8fe5 | 3217 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3218 | |
06f814a3 TM |
3219 | if (RPC_ASSASSINATED(task)) |
3220 | return; | |
faf5f49c TM |
3221 | switch (task->tk_status) { |
3222 | case 0: | |
3223 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3224 | calldata->res.stateid.data, |
faf5f49c | 3225 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3226 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3227 | break; |
9e33bed5 TM |
3228 | case -NFS4ERR_BAD_STATEID: |
3229 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3230 | case -NFS4ERR_STALE_STATEID: |
3231 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3232 | break; |
3233 | default: | |
9e33bed5 | 3234 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
faf5f49c | 3235 | rpc_restart_call(task); |
faf5f49c | 3236 | } |
faf5f49c TM |
3237 | } |
3238 | ||
4ce70ada | 3239 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3240 | { |
4ce70ada | 3241 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3242 | |
911d1aaf | 3243 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3244 | return; |
3245 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3246 | /* Note: exit _without_ running nfs4_locku_done */ |
3247 | task->tk_action = NULL; | |
faf5f49c TM |
3248 | return; |
3249 | } | |
26e976a8 | 3250 | calldata->timestamp = jiffies; |
5138fde0 | 3251 | rpc_call_start(task); |
faf5f49c TM |
3252 | } |
3253 | ||
963d8fe5 | 3254 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3255 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3256 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3257 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3258 | }; |
3259 | ||
a5d16a4d TM |
3260 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3261 | struct nfs_open_context *ctx, | |
3262 | struct nfs4_lock_state *lsp, | |
3263 | struct nfs_seqid *seqid) | |
3264 | { | |
3265 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3266 | struct rpc_message msg = { |
3267 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3268 | .rpc_cred = ctx->cred, | |
3269 | }; | |
c970aa85 TM |
3270 | struct rpc_task_setup task_setup_data = { |
3271 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3272 | .rpc_message = &msg, |
c970aa85 | 3273 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3274 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3275 | .flags = RPC_TASK_ASYNC, |
3276 | }; | |
a5d16a4d | 3277 | |
137d6aca FF |
3278 | /* Ensure this is an unlock - when canceling a lock, the |
3279 | * canceled lock is passed in, and it won't be an unlock. | |
3280 | */ | |
3281 | fl->fl_type = F_UNLCK; | |
3282 | ||
a5d16a4d TM |
3283 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3284 | if (data == NULL) { | |
3285 | nfs_free_seqid(seqid); | |
3286 | return ERR_PTR(-ENOMEM); | |
3287 | } | |
3288 | ||
5138fde0 TM |
3289 | msg.rpc_argp = &data->arg, |
3290 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3291 | task_setup_data.callback_data = data; |
3292 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3293 | } |
3294 | ||
faf5f49c TM |
3295 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3296 | { | |
19e03c57 | 3297 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3298 | struct nfs_seqid *seqid; |
1da177e4 | 3299 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3300 | struct rpc_task *task; |
3301 | int status = 0; | |
536ff0f8 | 3302 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3303 | |
8d0a8a9d | 3304 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3305 | /* Unlock _before_ we do the RPC call */ |
3306 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3307 | down_read(&nfsi->rwsem); |
3308 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3309 | up_read(&nfsi->rwsem); | |
9b073574 | 3310 | goto out; |
19e03c57 TM |
3311 | } |
3312 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3313 | if (status != 0) |
9b073574 TM |
3314 | goto out; |
3315 | /* Is this a delegated lock? */ | |
3316 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3317 | goto out; | |
8d0a8a9d | 3318 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3319 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3320 | status = -ENOMEM; |
911d1aaf | 3321 | if (seqid == NULL) |
9b073574 | 3322 | goto out; |
cd3758e3 | 3323 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3324 | status = PTR_ERR(task); |
3325 | if (IS_ERR(task)) | |
9b073574 | 3326 | goto out; |
a5d16a4d | 3327 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3328 | rpc_put_task(task); |
9b073574 | 3329 | out: |
536ff0f8 | 3330 | request->fl_flags = fl_flags; |
1da177e4 LT |
3331 | return status; |
3332 | } | |
3333 | ||
a5d16a4d TM |
3334 | struct nfs4_lockdata { |
3335 | struct nfs_lock_args arg; | |
3336 | struct nfs_lock_res res; | |
3337 | struct nfs4_lock_state *lsp; | |
3338 | struct nfs_open_context *ctx; | |
3339 | struct file_lock fl; | |
26e976a8 | 3340 | unsigned long timestamp; |
a5d16a4d TM |
3341 | int rpc_status; |
3342 | int cancelled; | |
3343 | }; | |
3344 | ||
3345 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3346 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3347 | { |
a5d16a4d TM |
3348 | struct nfs4_lockdata *p; |
3349 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3350 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3351 | |
3352 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3353 | if (p == NULL) | |
3354 | return NULL; | |
3355 | ||
3356 | p->arg.fh = NFS_FH(inode); | |
3357 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
3358 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
3359 | if (p->arg.open_seqid == NULL) | |
3360 | goto out_free; | |
a5d16a4d TM |
3361 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3362 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 3363 | goto out_free_seqid; |
a5d16a4d | 3364 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3365 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3366 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3367 | p->res.lock_seqid = p->arg.lock_seqid; |
a5d16a4d TM |
3368 | p->lsp = lsp; |
3369 | atomic_inc(&lsp->ls_count); | |
3370 | p->ctx = get_nfs_open_context(ctx); | |
3371 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3372 | return p; | |
2f74c0a0 TM |
3373 | out_free_seqid: |
3374 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3375 | out_free: |
3376 | kfree(p); | |
3377 | return NULL; | |
3378 | } | |
3379 | ||
3380 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3381 | { | |
3382 | struct nfs4_lockdata *data = calldata; | |
3383 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3384 | |
3110ff80 | 3385 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3386 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3387 | return; | |
a5d16a4d TM |
3388 | /* Do we need to do an open_to_lock_owner? */ |
3389 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3390 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3391 | return; | |
a5d16a4d TM |
3392 | data->arg.open_stateid = &state->stateid; |
3393 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3394 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3395 | } else |
3396 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3397 | data->timestamp = jiffies; |
5138fde0 | 3398 | rpc_call_start(task); |
3110ff80 | 3399 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3400 | } |
3401 | ||
3402 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3403 | { | |
3404 | struct nfs4_lockdata *data = calldata; | |
3405 | ||
3110ff80 | 3406 | dprintk("%s: begin!\n", __func__); |
a5d16a4d TM |
3407 | |
3408 | data->rpc_status = task->tk_status; | |
3409 | if (RPC_ASSASSINATED(task)) | |
3410 | goto out; | |
3411 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
3412 | if (data->rpc_status == 0) |
3413 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3414 | else | |
3415 | goto out; | |
3416 | } | |
3417 | if (data->rpc_status == 0) { | |
3418 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3419 | sizeof(data->lsp->ls_stateid.data)); | |
3420 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3421 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 3422 | } |
a5d16a4d | 3423 | out: |
3110ff80 | 3424 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
3425 | } |
3426 | ||
3427 | static void nfs4_lock_release(void *calldata) | |
3428 | { | |
3429 | struct nfs4_lockdata *data = calldata; | |
3430 | ||
3110ff80 | 3431 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 3432 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
3433 | if (data->cancelled != 0) { |
3434 | struct rpc_task *task; | |
3435 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3436 | data->arg.lock_seqid); | |
3437 | if (!IS_ERR(task)) | |
e6b3c4db | 3438 | rpc_put_task(task); |
3110ff80 | 3439 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
3440 | } else |
3441 | nfs_free_seqid(data->arg.lock_seqid); | |
3442 | nfs4_put_lock_state(data->lsp); | |
3443 | put_nfs_open_context(data->ctx); | |
3444 | kfree(data); | |
3110ff80 | 3445 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
3446 | } |
3447 | ||
3448 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3449 | .rpc_call_prepare = nfs4_lock_prepare, | |
3450 | .rpc_call_done = nfs4_lock_done, | |
3451 | .rpc_release = nfs4_lock_release, | |
3452 | }; | |
3453 | ||
3454 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3455 | { | |
3456 | struct nfs4_lockdata *data; | |
3457 | struct rpc_task *task; | |
5138fde0 TM |
3458 | struct rpc_message msg = { |
3459 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3460 | .rpc_cred = state->owner->so_cred, | |
3461 | }; | |
c970aa85 TM |
3462 | struct rpc_task_setup task_setup_data = { |
3463 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 3464 | .rpc_message = &msg, |
c970aa85 | 3465 | .callback_ops = &nfs4_lock_ops, |
101070ca | 3466 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3467 | .flags = RPC_TASK_ASYNC, |
3468 | }; | |
a5d16a4d TM |
3469 | int ret; |
3470 | ||
3110ff80 | 3471 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 3472 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
3473 | fl->fl_u.nfs4_fl.owner); |
3474 | if (data == NULL) | |
3475 | return -ENOMEM; | |
3476 | if (IS_SETLKW(cmd)) | |
3477 | data->arg.block = 1; | |
3478 | if (reclaim != 0) | |
3479 | data->arg.reclaim = 1; | |
5138fde0 TM |
3480 | msg.rpc_argp = &data->arg, |
3481 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3482 | task_setup_data.callback_data = data; |
3483 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 3484 | if (IS_ERR(task)) |
a5d16a4d | 3485 | return PTR_ERR(task); |
a5d16a4d TM |
3486 | ret = nfs4_wait_for_completion_rpc_task(task); |
3487 | if (ret == 0) { | |
3488 | ret = data->rpc_status; | |
3489 | if (ret == -NFS4ERR_DENIED) | |
3490 | ret = -EAGAIN; | |
3491 | } else | |
3492 | data->cancelled = 1; | |
e6b3c4db | 3493 | rpc_put_task(task); |
3110ff80 | 3494 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 3495 | return ret; |
1da177e4 LT |
3496 | } |
3497 | ||
3498 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3499 | { | |
202b50dc TM |
3500 | struct nfs_server *server = NFS_SERVER(state->inode); |
3501 | struct nfs4_exception exception = { }; | |
3502 | int err; | |
3503 | ||
3504 | do { | |
42a2d13e TM |
3505 | /* Cache the lock if possible... */ |
3506 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3507 | return 0; | |
202b50dc TM |
3508 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3509 | if (err != -NFS4ERR_DELAY) | |
3510 | break; | |
3511 | nfs4_handle_exception(server, err, &exception); | |
3512 | } while (exception.retry); | |
3513 | return err; | |
1da177e4 LT |
3514 | } |
3515 | ||
3516 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3517 | { | |
202b50dc TM |
3518 | struct nfs_server *server = NFS_SERVER(state->inode); |
3519 | struct nfs4_exception exception = { }; | |
3520 | int err; | |
3521 | ||
6bfc93ef TM |
3522 | err = nfs4_set_lock_state(state, request); |
3523 | if (err != 0) | |
3524 | return err; | |
202b50dc | 3525 | do { |
42a2d13e TM |
3526 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3527 | return 0; | |
202b50dc TM |
3528 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3529 | if (err != -NFS4ERR_DELAY) | |
3530 | break; | |
3531 | nfs4_handle_exception(server, err, &exception); | |
3532 | } while (exception.retry); | |
3533 | return err; | |
1da177e4 LT |
3534 | } |
3535 | ||
3536 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3537 | { | |
19e03c57 | 3538 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 3539 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3540 | int status; |
3541 | ||
6bfc93ef | 3542 | /* Is this a delegated open? */ |
6bfc93ef TM |
3543 | status = nfs4_set_lock_state(state, request); |
3544 | if (status != 0) | |
3545 | goto out; | |
01c3b861 TM |
3546 | request->fl_flags |= FL_ACCESS; |
3547 | status = do_vfs_lock(request->fl_file, request); | |
3548 | if (status < 0) | |
3549 | goto out; | |
19e03c57 | 3550 | down_read(&nfsi->rwsem); |
01c3b861 | 3551 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 3552 | /* Yes: cache locks! */ |
01c3b861 | 3553 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
3554 | request->fl_flags = fl_flags & ~FL_SLEEP; |
3555 | status = do_vfs_lock(request->fl_file, request); | |
3556 | goto out_unlock; | |
01c3b861 | 3557 | } |
6bfc93ef TM |
3558 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3559 | if (status != 0) | |
01c3b861 | 3560 | goto out_unlock; |
6bfc93ef | 3561 | /* Note: we always want to sleep here! */ |
01c3b861 | 3562 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 3563 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 3564 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 3565 | out_unlock: |
19e03c57 | 3566 | up_read(&nfsi->rwsem); |
01c3b861 TM |
3567 | out: |
3568 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3569 | return status; |
3570 | } | |
3571 | ||
3572 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3573 | { | |
3574 | struct nfs4_exception exception = { }; | |
3575 | int err; | |
3576 | ||
3577 | do { | |
3578 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3579 | _nfs4_proc_setlk(state, cmd, request), | |
3580 | &exception); | |
3581 | } while (exception.retry); | |
3582 | return err; | |
3583 | } | |
3584 | ||
3585 | static int | |
3586 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3587 | { | |
3588 | struct nfs_open_context *ctx; | |
3589 | struct nfs4_state *state; | |
3590 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3591 | int status; | |
3592 | ||
3593 | /* verify open state */ | |
cd3758e3 | 3594 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
3595 | state = ctx->state; |
3596 | ||
3597 | if (request->fl_start < 0 || request->fl_end < 0) | |
3598 | return -EINVAL; | |
3599 | ||
3600 | if (IS_GETLK(cmd)) | |
3601 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3602 | ||
3603 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3604 | return -EINVAL; | |
3605 | ||
3606 | if (request->fl_type == F_UNLCK) | |
3607 | return nfs4_proc_unlck(state, cmd, request); | |
3608 | ||
3609 | do { | |
3610 | status = nfs4_proc_setlk(state, cmd, request); | |
3611 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3612 | break; | |
3613 | timeout = nfs4_set_lock_task_retry(timeout); | |
3614 | status = -ERESTARTSYS; | |
3615 | if (signalled()) | |
3616 | break; | |
3617 | } while(status < 0); | |
1da177e4 LT |
3618 | return status; |
3619 | } | |
3620 | ||
888e694c TM |
3621 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3622 | { | |
3623 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3624 | struct nfs4_exception exception = { }; | |
3625 | int err; | |
3626 | ||
3627 | err = nfs4_set_lock_state(state, fl); | |
3628 | if (err != 0) | |
3629 | goto out; | |
3630 | do { | |
3631 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3632 | if (err != -NFS4ERR_DELAY) | |
3633 | break; | |
3634 | err = nfs4_handle_exception(server, err, &exception); | |
3635 | } while (exception.retry); | |
3636 | out: | |
3637 | return err; | |
3638 | } | |
6b3b5496 | 3639 | |
aa1870af BF |
3640 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3641 | ||
6b3b5496 BF |
3642 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3643 | size_t buflen, int flags) | |
3644 | { | |
4b580ee3 BF |
3645 | struct inode *inode = dentry->d_inode; |
3646 | ||
3647 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3648 | return -EOPNOTSUPP; | |
3649 | ||
4b580ee3 | 3650 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
3651 | } |
3652 | ||
3653 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3654 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3655 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3656 | * attributes in kernel-managed attribute namespaces. */ | |
3657 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3658 | size_t buflen) | |
3659 | { | |
aa1870af BF |
3660 | struct inode *inode = dentry->d_inode; |
3661 | ||
3662 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3663 | return -EOPNOTSUPP; | |
3664 | ||
3665 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3666 | } |
3667 | ||
3668 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3669 | { | |
aa1870af | 3670 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 3671 | |
096455a2 BF |
3672 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
3673 | return 0; | |
6b3b5496 BF |
3674 | if (buf && buflen < len) |
3675 | return -ERANGE; | |
3676 | if (buf) | |
aa1870af BF |
3677 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3678 | return len; | |
6b3b5496 BF |
3679 | } |
3680 | ||
56659e99 | 3681 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 3682 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
3683 | { |
3684 | struct nfs_server *server = NFS_SERVER(dir); | |
3685 | u32 bitmask[2] = { | |
361e624f MN |
3686 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
3687 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
3688 | }; |
3689 | struct nfs4_fs_locations_arg args = { | |
3690 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 3691 | .name = name, |
683b57b4 TM |
3692 | .page = page, |
3693 | .bitmask = bitmask, | |
3694 | }; | |
3695 | struct rpc_message msg = { | |
3696 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3697 | .rpc_argp = &args, | |
7aaa0b3b | 3698 | .rpc_resp = fs_locations, |
683b57b4 TM |
3699 | }; |
3700 | int status; | |
3701 | ||
3110ff80 | 3702 | dprintk("%s: start\n", __func__); |
c228fd3a | 3703 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 3704 | fs_locations->server = server; |
830b8e33 | 3705 | fs_locations->nlocations = 0; |
683b57b4 | 3706 | status = rpc_call_sync(server->client, &msg, 0); |
3110ff80 | 3707 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
3708 | return status; |
3709 | } | |
3710 | ||
1da177e4 | 3711 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
7eff03ae | 3712 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 3713 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
3714 | .recover_open = nfs4_open_reclaim, |
3715 | .recover_lock = nfs4_lock_reclaim, | |
3716 | }; | |
3717 | ||
b79a4a1b | 3718 | struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { |
7eff03ae | 3719 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 3720 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
3721 | .recover_open = nfs4_open_expired, |
3722 | .recover_lock = nfs4_lock_expired, | |
3723 | }; | |
3724 | ||
92e1d5be | 3725 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
3726 | .permission = nfs_permission, |
3727 | .getattr = nfs_getattr, | |
3728 | .setattr = nfs_setattr, | |
3729 | .getxattr = nfs4_getxattr, | |
3730 | .setxattr = nfs4_setxattr, | |
3731 | .listxattr = nfs4_listxattr, | |
3732 | }; | |
3733 | ||
509de811 | 3734 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
3735 | .version = 4, /* protocol version */ |
3736 | .dentry_ops = &nfs4_dentry_operations, | |
3737 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3738 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3739 | .getroot = nfs4_proc_get_root, |
3740 | .getattr = nfs4_proc_getattr, | |
3741 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 3742 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
3743 | .lookup = nfs4_proc_lookup, |
3744 | .access = nfs4_proc_access, | |
3745 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
3746 | .create = nfs4_proc_create, |
3747 | .remove = nfs4_proc_remove, | |
3748 | .unlink_setup = nfs4_proc_unlink_setup, | |
3749 | .unlink_done = nfs4_proc_unlink_done, | |
3750 | .rename = nfs4_proc_rename, | |
3751 | .link = nfs4_proc_link, | |
3752 | .symlink = nfs4_proc_symlink, | |
3753 | .mkdir = nfs4_proc_mkdir, | |
3754 | .rmdir = nfs4_proc_remove, | |
3755 | .readdir = nfs4_proc_readdir, | |
3756 | .mknod = nfs4_proc_mknod, | |
3757 | .statfs = nfs4_proc_statfs, | |
3758 | .fsinfo = nfs4_proc_fsinfo, | |
3759 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 3760 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
3761 | .decode_dirent = nfs4_decode_dirent, |
3762 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 3763 | .read_done = nfs4_read_done, |
1da177e4 | 3764 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 3765 | .write_done = nfs4_write_done, |
1da177e4 | 3766 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 3767 | .commit_done = nfs4_commit_done, |
1da177e4 | 3768 | .lock = nfs4_proc_lock, |
e50a1c2e | 3769 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3770 | }; |
3771 | ||
3772 | /* | |
3773 | * Local variables: | |
3774 | * c-basic-offset: 8 | |
3775 | * End: | |
3776 | */ |