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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
39 | #include <linux/utsname.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/namei.h> | |
02a913a7 | 50 | #include <linux/mount.h> |
1da177e4 | 51 | |
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 | 53 | #include "delegation.h" |
101070ca | 54 | #include "internal.h" |
006ea73e | 55 | #include "iostat.h" |
1da177e4 LT |
56 | |
57 | #define NFSDBG_FACILITY NFSDBG_PROC | |
58 | ||
2066fe89 | 59 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
60 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
61 | ||
cdd4e68b | 62 | struct nfs4_opendata; |
864472e9 | 63 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 64 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 65 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
66 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
67 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
1da177e4 | 68 | |
1da177e4 | 69 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 70 | static int nfs4_map_errors(int err) |
1da177e4 LT |
71 | { |
72 | if (err < -1000) { | |
73 | dprintk("%s could not handle NFSv4 error %d\n", | |
3110ff80 | 74 | __func__, -err); |
1da177e4 LT |
75 | return -EIO; |
76 | } | |
77 | return err; | |
78 | } | |
79 | ||
80 | /* | |
81 | * This is our standard bitmap for GETATTR requests. | |
82 | */ | |
83 | const u32 nfs4_fattr_bitmap[2] = { | |
84 | FATTR4_WORD0_TYPE | |
85 | | FATTR4_WORD0_CHANGE | |
86 | | FATTR4_WORD0_SIZE | |
87 | | FATTR4_WORD0_FSID | |
88 | | FATTR4_WORD0_FILEID, | |
89 | FATTR4_WORD1_MODE | |
90 | | FATTR4_WORD1_NUMLINKS | |
91 | | FATTR4_WORD1_OWNER | |
92 | | FATTR4_WORD1_OWNER_GROUP | |
93 | | FATTR4_WORD1_RAWDEV | |
94 | | FATTR4_WORD1_SPACE_USED | |
95 | | FATTR4_WORD1_TIME_ACCESS | |
96 | | FATTR4_WORD1_TIME_METADATA | |
97 | | FATTR4_WORD1_TIME_MODIFY | |
98 | }; | |
99 | ||
100 | const u32 nfs4_statfs_bitmap[2] = { | |
101 | FATTR4_WORD0_FILES_AVAIL | |
102 | | FATTR4_WORD0_FILES_FREE | |
103 | | FATTR4_WORD0_FILES_TOTAL, | |
104 | FATTR4_WORD1_SPACE_AVAIL | |
105 | | FATTR4_WORD1_SPACE_FREE | |
106 | | FATTR4_WORD1_SPACE_TOTAL | |
107 | }; | |
108 | ||
4ce79717 | 109 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
110 | FATTR4_WORD0_MAXLINK |
111 | | FATTR4_WORD0_MAXNAME, | |
112 | 0 | |
113 | }; | |
114 | ||
115 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
116 | | FATTR4_WORD0_MAXREAD | |
117 | | FATTR4_WORD0_MAXWRITE | |
118 | | FATTR4_WORD0_LEASE_TIME, | |
119 | 0 | |
120 | }; | |
121 | ||
830b8e33 MN |
122 | const u32 nfs4_fs_locations_bitmap[2] = { |
123 | FATTR4_WORD0_TYPE | |
124 | | FATTR4_WORD0_CHANGE | |
125 | | FATTR4_WORD0_SIZE | |
126 | | FATTR4_WORD0_FSID | |
127 | | FATTR4_WORD0_FILEID | |
128 | | FATTR4_WORD0_FS_LOCATIONS, | |
129 | FATTR4_WORD1_MODE | |
130 | | FATTR4_WORD1_NUMLINKS | |
131 | | FATTR4_WORD1_OWNER | |
132 | | FATTR4_WORD1_OWNER_GROUP | |
133 | | FATTR4_WORD1_RAWDEV | |
134 | | FATTR4_WORD1_SPACE_USED | |
135 | | FATTR4_WORD1_TIME_ACCESS | |
136 | | FATTR4_WORD1_TIME_METADATA | |
137 | | FATTR4_WORD1_TIME_MODIFY | |
138 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
139 | }; | |
140 | ||
bc4785cd | 141 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
142 | struct nfs4_readdir_arg *readdir) |
143 | { | |
0dbb4c67 | 144 | __be32 *start, *p; |
1da177e4 LT |
145 | |
146 | BUG_ON(readdir->count < 80); | |
147 | if (cookie > 2) { | |
b7ef1956 | 148 | readdir->cookie = cookie; |
1da177e4 LT |
149 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
150 | return; | |
151 | } | |
152 | ||
153 | readdir->cookie = 0; | |
154 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
155 | if (cookie == 2) | |
156 | return; | |
157 | ||
158 | /* | |
159 | * NFSv4 servers do not return entries for '.' and '..' | |
160 | * Therefore, we fake these entries here. We let '.' | |
161 | * have cookie 0 and '..' have cookie 1. Note that | |
162 | * when talking to the server, we always send cookie 0 | |
163 | * instead of 1 or 2. | |
164 | */ | |
0dbb4c67 | 165 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
166 | |
167 | if (cookie == 0) { | |
168 | *p++ = xdr_one; /* next */ | |
169 | *p++ = xdr_zero; /* cookie, first word */ | |
170 | *p++ = xdr_one; /* cookie, second word */ | |
171 | *p++ = xdr_one; /* entry len */ | |
172 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
173 | p++; | |
174 | *p++ = xdr_one; /* bitmap length */ | |
175 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
176 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 177 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
178 | } |
179 | ||
180 | *p++ = xdr_one; /* next */ | |
181 | *p++ = xdr_zero; /* cookie, first word */ | |
182 | *p++ = xdr_two; /* cookie, second word */ | |
183 | *p++ = xdr_two; /* entry len */ | |
184 | memcpy(p, "..\0\0", 4); /* entry */ | |
185 | p++; | |
186 | *p++ = xdr_one; /* bitmap length */ | |
187 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
188 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 189 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
190 | |
191 | readdir->pgbase = (char *)p - (char *)start; | |
192 | readdir->count -= readdir->pgbase; | |
193 | kunmap_atomic(start, KM_USER0); | |
194 | } | |
195 | ||
65de872e TM |
196 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
197 | { | |
198 | int res; | |
199 | ||
200 | might_sleep(); | |
201 | ||
e005e804 | 202 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 203 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
204 | return res; |
205 | } | |
206 | ||
207 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
208 | { | |
209 | int res = 0; | |
210 | ||
211 | might_sleep(); | |
212 | ||
213 | if (*timeout <= 0) | |
214 | *timeout = NFS4_POLL_RETRY_MIN; | |
215 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
216 | *timeout = NFS4_POLL_RETRY_MAX; | |
217 | schedule_timeout_killable(*timeout); | |
218 | if (fatal_signal_pending(current)) | |
219 | res = -ERESTARTSYS; | |
220 | *timeout <<= 1; | |
221 | return res; | |
222 | } | |
223 | ||
224 | /* This is the error handling routine for processes that are allowed | |
225 | * to sleep. | |
226 | */ | |
227 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
228 | { | |
229 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 230 | struct nfs4_state *state = exception->state; |
65de872e TM |
231 | int ret = errorcode; |
232 | ||
233 | exception->retry = 0; | |
234 | switch(errorcode) { | |
235 | case 0: | |
236 | return 0; | |
9e33bed5 TM |
237 | case -NFS4ERR_ADMIN_REVOKED: |
238 | case -NFS4ERR_BAD_STATEID: | |
239 | case -NFS4ERR_OPENMODE: | |
240 | if (state == NULL) | |
241 | break; | |
242 | nfs4_state_mark_reclaim_nograce(clp, state); | |
65de872e TM |
243 | case -NFS4ERR_STALE_CLIENTID: |
244 | case -NFS4ERR_STALE_STATEID: | |
245 | case -NFS4ERR_EXPIRED: | |
246 | nfs4_schedule_state_recovery(clp); | |
247 | ret = nfs4_wait_clnt_recover(clp); | |
248 | if (ret == 0) | |
249 | exception->retry = 1; | |
250 | break; | |
251 | case -NFS4ERR_FILE_OPEN: | |
252 | case -NFS4ERR_GRACE: | |
253 | case -NFS4ERR_DELAY: | |
254 | ret = nfs4_delay(server->client, &exception->timeout); | |
255 | if (ret != 0) | |
256 | break; | |
257 | case -NFS4ERR_OLD_STATEID: | |
258 | exception->retry = 1; | |
259 | } | |
260 | /* We failed to handle the error */ | |
261 | return nfs4_map_errors(ret); | |
262 | } | |
263 | ||
264 | ||
26e976a8 | 265 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 266 | { |
7539bbab | 267 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
268 | spin_lock(&clp->cl_lock); |
269 | if (time_before(clp->cl_last_renewal,timestamp)) | |
270 | clp->cl_last_renewal = timestamp; | |
271 | spin_unlock(&clp->cl_lock); | |
272 | } | |
273 | ||
cccef3b9 AA |
274 | #if defined(CONFIG_NFS_V4_1) |
275 | ||
276 | int _nfs4_call_sync_session(struct nfs_server *server, | |
277 | struct rpc_message *msg, | |
278 | struct nfs4_sequence_args *args, | |
279 | struct nfs4_sequence_res *res, | |
280 | int cache_reply) | |
281 | { | |
282 | /* in preparation for setting up the sequence op */ | |
283 | return rpc_call_sync(server->client, msg, 0); | |
284 | } | |
285 | ||
286 | #endif /* CONFIG_NFS_V4_1 */ | |
287 | ||
288 | int _nfs4_call_sync(struct nfs_server *server, | |
289 | struct rpc_message *msg, | |
290 | struct nfs4_sequence_args *args, | |
291 | struct nfs4_sequence_res *res, | |
292 | int cache_reply) | |
293 | { | |
f3752975 | 294 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
295 | return rpc_call_sync(server->client, msg, 0); |
296 | } | |
297 | ||
298 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
299 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
300 | &(res)->seq_res, (cache_reply)) | |
301 | ||
38478b24 | 302 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 303 | { |
38478b24 | 304 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 305 | |
38478b24 | 306 | spin_lock(&dir->i_lock); |
40d24704 TM |
307 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
308 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 309 | nfs_force_lookup_revalidate(dir); |
40d24704 | 310 | nfsi->change_attr = cinfo->after; |
38478b24 | 311 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
312 | } |
313 | ||
e56e0b78 | 314 | struct nfs4_opendata { |
c6d00e63 | 315 | struct kref kref; |
e56e0b78 TM |
316 | struct nfs_openargs o_arg; |
317 | struct nfs_openres o_res; | |
cdd4e68b TM |
318 | struct nfs_open_confirmargs c_arg; |
319 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
320 | struct nfs_fattr f_attr; |
321 | struct nfs_fattr dir_attr; | |
ad389da7 | 322 | struct path path; |
e56e0b78 TM |
323 | struct dentry *dir; |
324 | struct nfs4_state_owner *owner; | |
aac00a8d | 325 | struct nfs4_state *state; |
e56e0b78 | 326 | struct iattr attrs; |
26e976a8 | 327 | unsigned long timestamp; |
3e309914 | 328 | unsigned int rpc_done : 1; |
24ac23ab TM |
329 | int rpc_status; |
330 | int cancelled; | |
e56e0b78 TM |
331 | }; |
332 | ||
2ced46c2 TM |
333 | |
334 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
335 | { | |
336 | p->o_res.f_attr = &p->f_attr; | |
337 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
338 | p->o_res.seqid = p->o_arg.seqid; |
339 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
340 | p->o_res.server = p->o_arg.server; |
341 | nfs_fattr_init(&p->f_attr); | |
342 | nfs_fattr_init(&p->dir_attr); | |
343 | } | |
344 | ||
ad389da7 | 345 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 346 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
347 | const struct iattr *attrs) |
348 | { | |
ad389da7 | 349 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
350 | struct inode *dir = parent->d_inode; |
351 | struct nfs_server *server = NFS_SERVER(dir); | |
352 | struct nfs4_opendata *p; | |
353 | ||
354 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
355 | if (p == NULL) | |
356 | goto err; | |
357 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
358 | if (p->o_arg.seqid == NULL) | |
359 | goto err_free; | |
ad389da7 TM |
360 | p->path.mnt = mntget(path->mnt); |
361 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
362 | p->dir = parent; |
363 | p->owner = sp; | |
364 | atomic_inc(&sp->so_count); | |
365 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
366 | p->o_arg.open_flags = flags; |
367 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 368 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 369 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 370 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
371 | p->o_arg.server = server; |
372 | p->o_arg.bitmask = server->attr_bitmask; | |
373 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
5f7dbd5c | 374 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
e56e0b78 TM |
375 | if (flags & O_EXCL) { |
376 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
377 | s[0] = jiffies; | |
378 | s[1] = current->pid; | |
379 | } else if (flags & O_CREAT) { | |
380 | p->o_arg.u.attrs = &p->attrs; | |
381 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
382 | } | |
cdd4e68b TM |
383 | p->c_arg.fh = &p->o_res.fh; |
384 | p->c_arg.stateid = &p->o_res.stateid; | |
385 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 386 | nfs4_init_opendata_res(p); |
c6d00e63 | 387 | kref_init(&p->kref); |
e56e0b78 TM |
388 | return p; |
389 | err_free: | |
390 | kfree(p); | |
391 | err: | |
392 | dput(parent); | |
393 | return NULL; | |
394 | } | |
395 | ||
c6d00e63 | 396 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 397 | { |
c6d00e63 TM |
398 | struct nfs4_opendata *p = container_of(kref, |
399 | struct nfs4_opendata, kref); | |
400 | ||
401 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
402 | if (p->state != NULL) |
403 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
404 | nfs4_put_state_owner(p->owner); |
405 | dput(p->dir); | |
31f31db1 | 406 | path_put(&p->path); |
c6d00e63 TM |
407 | kfree(p); |
408 | } | |
409 | ||
410 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
411 | { | |
412 | if (p != NULL) | |
413 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
414 | } |
415 | ||
06f814a3 TM |
416 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
417 | { | |
06f814a3 TM |
418 | int ret; |
419 | ||
06f814a3 | 420 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
421 | return ret; |
422 | } | |
423 | ||
dc0b027d | 424 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
425 | { |
426 | int ret = 0; | |
dc0b027d TM |
427 | |
428 | if (open_mode & O_EXCL) | |
429 | goto out; | |
430 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 TM |
431 | case FMODE_READ: |
432 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
433 | break; |
434 | case FMODE_WRITE: | |
435 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
436 | break; |
437 | case FMODE_READ|FMODE_WRITE: | |
438 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
439 | } | |
dc0b027d | 440 | out: |
6ee41268 TM |
441 | return ret; |
442 | } | |
443 | ||
dc0b027d | 444 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 445 | { |
dc0b027d | 446 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 447 | return 0; |
15c831bf | 448 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 449 | return 0; |
b7391f44 | 450 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
451 | return 1; |
452 | } | |
453 | ||
dc0b027d | 454 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 455 | { |
dc0b027d | 456 | switch (fmode) { |
e7616923 TM |
457 | case FMODE_WRITE: |
458 | state->n_wronly++; | |
459 | break; | |
460 | case FMODE_READ: | |
461 | state->n_rdonly++; | |
462 | break; | |
463 | case FMODE_READ|FMODE_WRITE: | |
464 | state->n_rdwr++; | |
465 | } | |
dc0b027d | 466 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
467 | } |
468 | ||
dc0b027d | 469 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
470 | { |
471 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
472 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
473 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 474 | switch (fmode) { |
003707c7 TM |
475 | case FMODE_READ: |
476 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
477 | break; | |
478 | case FMODE_WRITE: | |
479 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
480 | break; | |
481 | case FMODE_READ|FMODE_WRITE: | |
482 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
483 | } | |
e7616923 TM |
484 | } |
485 | ||
dc0b027d | 486 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 487 | { |
8bda4e4c | 488 | write_seqlock(&state->seqlock); |
dc0b027d | 489 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 490 | write_sequnlock(&state->seqlock); |
003707c7 TM |
491 | } |
492 | ||
dc0b027d | 493 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 494 | { |
8bda4e4c TM |
495 | /* |
496 | * Protect the call to nfs4_state_set_mode_locked and | |
497 | * serialise the stateid update | |
498 | */ | |
499 | write_seqlock(&state->seqlock); | |
003707c7 TM |
500 | if (deleg_stateid != NULL) { |
501 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
502 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
503 | } | |
504 | if (open_stateid != NULL) | |
dc0b027d | 505 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
506 | write_sequnlock(&state->seqlock); |
507 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 508 | update_open_stateflags(state, fmode); |
ec073428 | 509 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
510 | } |
511 | ||
dc0b027d | 512 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
513 | { |
514 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
515 | struct nfs_delegation *deleg_cur; | |
516 | int ret = 0; | |
517 | ||
dc0b027d | 518 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
519 | |
520 | rcu_read_lock(); | |
521 | deleg_cur = rcu_dereference(nfsi->delegation); | |
522 | if (deleg_cur == NULL) | |
523 | goto no_delegation; | |
524 | ||
525 | spin_lock(&deleg_cur->lock); | |
526 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 527 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
528 | goto no_delegation_unlock; |
529 | ||
530 | if (delegation == NULL) | |
531 | delegation = &deleg_cur->stateid; | |
532 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
533 | goto no_delegation_unlock; | |
534 | ||
b7391f44 | 535 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 536 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
537 | ret = 1; |
538 | no_delegation_unlock: | |
539 | spin_unlock(&deleg_cur->lock); | |
540 | no_delegation: | |
541 | rcu_read_unlock(); | |
542 | ||
543 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 544 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
545 | ret = 1; |
546 | } | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
551 | ||
dc0b027d | 552 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
553 | { |
554 | struct nfs_delegation *delegation; | |
555 | ||
556 | rcu_read_lock(); | |
557 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 558 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
559 | rcu_read_unlock(); |
560 | return; | |
561 | } | |
562 | rcu_read_unlock(); | |
563 | nfs_inode_return_delegation(inode); | |
564 | } | |
565 | ||
6ee41268 | 566 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
567 | { |
568 | struct nfs4_state *state = opendata->state; | |
569 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
570 | struct nfs_delegation *delegation; | |
dc0b027d TM |
571 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
572 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
573 | nfs4_stateid stateid; |
574 | int ret = -EAGAIN; | |
575 | ||
aac00a8d | 576 | for (;;) { |
dc0b027d | 577 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 578 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
579 | if (can_open_cached(state, fmode, open_mode)) { |
580 | update_open_stateflags(state, fmode); | |
6ee41268 | 581 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
582 | goto out_return_state; |
583 | } | |
584 | spin_unlock(&state->owner->so_lock); | |
585 | } | |
34310430 TM |
586 | rcu_read_lock(); |
587 | delegation = rcu_dereference(nfsi->delegation); | |
588 | if (delegation == NULL || | |
dc0b027d | 589 | !can_open_delegated(delegation, fmode)) { |
34310430 | 590 | rcu_read_unlock(); |
aac00a8d | 591 | break; |
34310430 | 592 | } |
aac00a8d TM |
593 | /* Save the delegation */ |
594 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
595 | rcu_read_unlock(); | |
af22f94a | 596 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
597 | if (ret != 0) |
598 | goto out; | |
599 | ret = -EAGAIN; | |
34310430 TM |
600 | |
601 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 602 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 603 | goto out_return_state; |
aac00a8d | 604 | } |
aac00a8d TM |
605 | out: |
606 | return ERR_PTR(ret); | |
607 | out_return_state: | |
608 | atomic_inc(&state->count); | |
609 | return state; | |
610 | } | |
611 | ||
24ac23ab TM |
612 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
613 | { | |
614 | struct inode *inode; | |
615 | struct nfs4_state *state = NULL; | |
003707c7 | 616 | struct nfs_delegation *delegation; |
1b370bc2 | 617 | int ret; |
24ac23ab | 618 | |
aac00a8d | 619 | if (!data->rpc_done) { |
6ee41268 | 620 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
621 | goto out; |
622 | } | |
623 | ||
1b370bc2 | 624 | ret = -EAGAIN; |
24ac23ab | 625 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 626 | goto err; |
24ac23ab | 627 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 628 | ret = PTR_ERR(inode); |
03f28e3a | 629 | if (IS_ERR(inode)) |
1b370bc2 TM |
630 | goto err; |
631 | ret = -ENOMEM; | |
24ac23ab TM |
632 | state = nfs4_get_open_state(inode, data->owner); |
633 | if (state == NULL) | |
1b370bc2 | 634 | goto err_put_inode; |
549d6ed5 | 635 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
636 | int delegation_flags = 0; |
637 | ||
003707c7 TM |
638 | rcu_read_lock(); |
639 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
640 | if (delegation) | |
641 | delegation_flags = delegation->flags; | |
642 | rcu_read_unlock(); | |
15c831bf | 643 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
644 | nfs_inode_set_delegation(state->inode, |
645 | data->owner->so_cred, | |
646 | &data->o_res); | |
647 | else | |
648 | nfs_inode_reclaim_delegation(state->inode, | |
649 | data->owner->so_cred, | |
650 | &data->o_res); | |
651 | } | |
34310430 TM |
652 | |
653 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 654 | data->o_arg.fmode); |
24ac23ab | 655 | iput(inode); |
aac00a8d | 656 | out: |
24ac23ab | 657 | return state; |
1b370bc2 TM |
658 | err_put_inode: |
659 | iput(inode); | |
660 | err: | |
661 | return ERR_PTR(ret); | |
24ac23ab TM |
662 | } |
663 | ||
864472e9 TM |
664 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
665 | { | |
666 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
667 | struct nfs_open_context *ctx; | |
668 | ||
669 | spin_lock(&state->inode->i_lock); | |
670 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
671 | if (ctx->state != state) | |
672 | continue; | |
673 | get_nfs_open_context(ctx); | |
674 | spin_unlock(&state->inode->i_lock); | |
675 | return ctx; | |
676 | } | |
677 | spin_unlock(&state->inode->i_lock); | |
678 | return ERR_PTR(-ENOENT); | |
679 | } | |
680 | ||
6f220ed5 TM |
681 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
682 | { | |
683 | struct nfs4_opendata *opendata; | |
684 | ||
dc0b027d | 685 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
686 | if (opendata == NULL) |
687 | return ERR_PTR(-ENOMEM); | |
688 | opendata->state = state; | |
689 | atomic_inc(&state->count); | |
690 | return opendata; | |
691 | } | |
692 | ||
dc0b027d | 693 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 694 | { |
2ced46c2 | 695 | struct nfs4_state *newstate; |
864472e9 TM |
696 | int ret; |
697 | ||
dc0b027d TM |
698 | opendata->o_arg.open_flags = 0; |
699 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
700 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
701 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
702 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
703 | ret = _nfs4_proc_open(opendata); |
704 | if (ret != 0) | |
705 | return ret; | |
2ced46c2 | 706 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
707 | if (IS_ERR(newstate)) |
708 | return PTR_ERR(newstate); | |
dc0b027d | 709 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 710 | *res = newstate; |
864472e9 TM |
711 | return 0; |
712 | } | |
713 | ||
714 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
715 | { | |
864472e9 | 716 | struct nfs4_state *newstate; |
864472e9 TM |
717 | int ret; |
718 | ||
719 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 720 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
721 | smp_rmb(); |
722 | if (state->n_rdwr != 0) { | |
2ced46c2 | 723 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
724 | if (ret != 0) |
725 | return ret; | |
2ced46c2 TM |
726 | if (newstate != state) |
727 | return -ESTALE; | |
864472e9 TM |
728 | } |
729 | if (state->n_wronly != 0) { | |
2ced46c2 | 730 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
731 | if (ret != 0) |
732 | return ret; | |
2ced46c2 TM |
733 | if (newstate != state) |
734 | return -ESTALE; | |
864472e9 TM |
735 | } |
736 | if (state->n_rdonly != 0) { | |
2ced46c2 | 737 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
738 | if (ret != 0) |
739 | return ret; | |
2ced46c2 TM |
740 | if (newstate != state) |
741 | return -ESTALE; | |
864472e9 | 742 | } |
1ac7e2fd TM |
743 | /* |
744 | * We may have performed cached opens for all three recoveries. | |
745 | * Check if we need to update the current stateid. | |
746 | */ | |
747 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
748 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 749 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
750 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
751 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 752 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 753 | } |
864472e9 TM |
754 | return 0; |
755 | } | |
756 | ||
1da177e4 LT |
757 | /* |
758 | * OPEN_RECLAIM: | |
759 | * reclaim state on the server after a reboot. | |
1da177e4 | 760 | */ |
539cd03a | 761 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 762 | { |
1ac7e2fd | 763 | struct nfs_delegation *delegation; |
864472e9 | 764 | struct nfs4_opendata *opendata; |
dc0b027d | 765 | fmode_t delegation_type = 0; |
1da177e4 LT |
766 | int status; |
767 | ||
6f220ed5 TM |
768 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
769 | if (IS_ERR(opendata)) | |
770 | return PTR_ERR(opendata); | |
864472e9 TM |
771 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
772 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
773 | rcu_read_lock(); |
774 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 775 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 776 | delegation_type = delegation->type; |
1ac7e2fd | 777 | rcu_read_unlock(); |
864472e9 TM |
778 | opendata->o_arg.u.delegation_type = delegation_type; |
779 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 780 | nfs4_opendata_put(opendata); |
1da177e4 LT |
781 | return status; |
782 | } | |
783 | ||
539cd03a | 784 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
785 | { |
786 | struct nfs_server *server = NFS_SERVER(state->inode); | |
787 | struct nfs4_exception exception = { }; | |
788 | int err; | |
789 | do { | |
539cd03a | 790 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
791 | if (err != -NFS4ERR_DELAY) |
792 | break; | |
793 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
794 | } while (exception.retry); |
795 | return err; | |
796 | } | |
797 | ||
864472e9 TM |
798 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
799 | { | |
800 | struct nfs_open_context *ctx; | |
801 | int ret; | |
802 | ||
803 | ctx = nfs4_state_find_open_context(state); | |
804 | if (IS_ERR(ctx)) | |
805 | return PTR_ERR(ctx); | |
539cd03a | 806 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
807 | put_nfs_open_context(ctx); |
808 | return ret; | |
809 | } | |
810 | ||
13437e12 | 811 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 812 | { |
e56e0b78 | 813 | struct nfs4_opendata *opendata; |
864472e9 | 814 | int ret; |
1da177e4 | 815 | |
6f220ed5 TM |
816 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
817 | if (IS_ERR(opendata)) | |
818 | return PTR_ERR(opendata); | |
e56e0b78 | 819 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 820 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 821 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 822 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 823 | nfs4_opendata_put(opendata); |
864472e9 | 824 | return ret; |
1da177e4 LT |
825 | } |
826 | ||
13437e12 | 827 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
828 | { |
829 | struct nfs4_exception exception = { }; | |
539cd03a | 830 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
831 | int err; |
832 | do { | |
13437e12 | 833 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
834 | switch (err) { |
835 | case 0: | |
836 | return err; | |
837 | case -NFS4ERR_STALE_CLIENTID: | |
838 | case -NFS4ERR_STALE_STATEID: | |
839 | case -NFS4ERR_EXPIRED: | |
840 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 841 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
842 | return err; |
843 | } | |
844 | err = nfs4_handle_exception(server, err, &exception); | |
845 | } while (exception.retry); | |
846 | return err; | |
847 | } | |
848 | ||
cdd4e68b TM |
849 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
850 | { | |
851 | struct nfs4_opendata *data = calldata; | |
852 | ||
853 | data->rpc_status = task->tk_status; | |
854 | if (RPC_ASSASSINATED(task)) | |
855 | return; | |
26e976a8 | 856 | if (data->rpc_status == 0) { |
cdd4e68b TM |
857 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
858 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 859 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 860 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 861 | data->rpc_done = 1; |
26e976a8 | 862 | } |
cdd4e68b TM |
863 | } |
864 | ||
865 | static void nfs4_open_confirm_release(void *calldata) | |
866 | { | |
867 | struct nfs4_opendata *data = calldata; | |
868 | struct nfs4_state *state = NULL; | |
869 | ||
870 | /* If this request hasn't been cancelled, do nothing */ | |
871 | if (data->cancelled == 0) | |
872 | goto out_free; | |
873 | /* In case of error, no cleanup! */ | |
3e309914 | 874 | if (!data->rpc_done) |
cdd4e68b | 875 | goto out_free; |
cdd4e68b | 876 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 877 | if (!IS_ERR(state)) |
dc0b027d | 878 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 879 | out_free: |
c6d00e63 | 880 | nfs4_opendata_put(data); |
cdd4e68b TM |
881 | } |
882 | ||
883 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
884 | .rpc_call_done = nfs4_open_confirm_done, |
885 | .rpc_release = nfs4_open_confirm_release, | |
886 | }; | |
887 | ||
888 | /* | |
889 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
890 | */ | |
891 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
892 | { | |
893 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
894 | struct rpc_task *task; | |
5138fde0 TM |
895 | struct rpc_message msg = { |
896 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
897 | .rpc_argp = &data->c_arg, | |
898 | .rpc_resp = &data->c_res, | |
899 | .rpc_cred = data->owner->so_cred, | |
900 | }; | |
c970aa85 TM |
901 | struct rpc_task_setup task_setup_data = { |
902 | .rpc_client = server->client, | |
5138fde0 | 903 | .rpc_message = &msg, |
c970aa85 TM |
904 | .callback_ops = &nfs4_open_confirm_ops, |
905 | .callback_data = data, | |
101070ca | 906 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
907 | .flags = RPC_TASK_ASYNC, |
908 | }; | |
1da177e4 LT |
909 | int status; |
910 | ||
c6d00e63 | 911 | kref_get(&data->kref); |
3e309914 TM |
912 | data->rpc_done = 0; |
913 | data->rpc_status = 0; | |
5138fde0 | 914 | data->timestamp = jiffies; |
c970aa85 | 915 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 916 | if (IS_ERR(task)) |
cdd4e68b | 917 | return PTR_ERR(task); |
cdd4e68b TM |
918 | status = nfs4_wait_for_completion_rpc_task(task); |
919 | if (status != 0) { | |
920 | data->cancelled = 1; | |
921 | smp_wmb(); | |
922 | } else | |
923 | status = data->rpc_status; | |
e6b3c4db | 924 | rpc_put_task(task); |
1da177e4 LT |
925 | return status; |
926 | } | |
927 | ||
24ac23ab | 928 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 929 | { |
24ac23ab TM |
930 | struct nfs4_opendata *data = calldata; |
931 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 932 | |
24ac23ab TM |
933 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
934 | return; | |
aac00a8d TM |
935 | /* |
936 | * Check if we still need to send an OPEN call, or if we can use | |
937 | * a delegation instead. | |
938 | */ | |
939 | if (data->state != NULL) { | |
940 | struct nfs_delegation *delegation; | |
941 | ||
dc0b027d | 942 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 943 | goto out_no_action; |
aac00a8d TM |
944 | rcu_read_lock(); |
945 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
946 | if (delegation != NULL && | |
15c831bf | 947 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 948 | rcu_read_unlock(); |
6ee41268 | 949 | goto out_no_action; |
aac00a8d TM |
950 | } |
951 | rcu_read_unlock(); | |
952 | } | |
24ac23ab | 953 | /* Update sequence id. */ |
9f958ab8 | 954 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 955 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 956 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 957 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
958 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
959 | } | |
26e976a8 | 960 | data->timestamp = jiffies; |
5138fde0 | 961 | rpc_call_start(task); |
6ee41268 TM |
962 | return; |
963 | out_no_action: | |
964 | task->tk_action = NULL; | |
965 | ||
24ac23ab | 966 | } |
1da177e4 | 967 | |
24ac23ab TM |
968 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
969 | { | |
970 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 971 | |
24ac23ab TM |
972 | data->rpc_status = task->tk_status; |
973 | if (RPC_ASSASSINATED(task)) | |
974 | return; | |
975 | if (task->tk_status == 0) { | |
976 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
977 | case S_IFREG: |
978 | break; | |
979 | case S_IFLNK: | |
24ac23ab | 980 | data->rpc_status = -ELOOP; |
6f926b5b TM |
981 | break; |
982 | case S_IFDIR: | |
24ac23ab | 983 | data->rpc_status = -EISDIR; |
6f926b5b TM |
984 | break; |
985 | default: | |
24ac23ab | 986 | data->rpc_status = -ENOTDIR; |
6f926b5b | 987 | } |
26e976a8 | 988 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
989 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
990 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 991 | } |
3e309914 | 992 | data->rpc_done = 1; |
24ac23ab | 993 | } |
6f926b5b | 994 | |
24ac23ab TM |
995 | static void nfs4_open_release(void *calldata) |
996 | { | |
997 | struct nfs4_opendata *data = calldata; | |
998 | struct nfs4_state *state = NULL; | |
999 | ||
1000 | /* If this request hasn't been cancelled, do nothing */ | |
1001 | if (data->cancelled == 0) | |
1002 | goto out_free; | |
1003 | /* In case of error, no cleanup! */ | |
3e309914 | 1004 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1005 | goto out_free; |
1006 | /* In case we need an open_confirm, no cleanup! */ | |
1007 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1008 | goto out_free; | |
24ac23ab | 1009 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1010 | if (!IS_ERR(state)) |
dc0b027d | 1011 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1012 | out_free: |
c6d00e63 | 1013 | nfs4_opendata_put(data); |
24ac23ab TM |
1014 | } |
1015 | ||
1016 | static const struct rpc_call_ops nfs4_open_ops = { | |
1017 | .rpc_call_prepare = nfs4_open_prepare, | |
1018 | .rpc_call_done = nfs4_open_done, | |
1019 | .rpc_release = nfs4_open_release, | |
1020 | }; | |
1021 | ||
1022 | /* | |
1023 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1024 | */ | |
1025 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1026 | { | |
1027 | struct inode *dir = data->dir->d_inode; | |
1028 | struct nfs_server *server = NFS_SERVER(dir); | |
1029 | struct nfs_openargs *o_arg = &data->o_arg; | |
1030 | struct nfs_openres *o_res = &data->o_res; | |
1031 | struct rpc_task *task; | |
5138fde0 TM |
1032 | struct rpc_message msg = { |
1033 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1034 | .rpc_argp = o_arg, | |
1035 | .rpc_resp = o_res, | |
1036 | .rpc_cred = data->owner->so_cred, | |
1037 | }; | |
c970aa85 TM |
1038 | struct rpc_task_setup task_setup_data = { |
1039 | .rpc_client = server->client, | |
5138fde0 | 1040 | .rpc_message = &msg, |
c970aa85 TM |
1041 | .callback_ops = &nfs4_open_ops, |
1042 | .callback_data = data, | |
101070ca | 1043 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1044 | .flags = RPC_TASK_ASYNC, |
1045 | }; | |
24ac23ab TM |
1046 | int status; |
1047 | ||
c6d00e63 | 1048 | kref_get(&data->kref); |
3e309914 TM |
1049 | data->rpc_done = 0; |
1050 | data->rpc_status = 0; | |
2ced46c2 | 1051 | data->cancelled = 0; |
c970aa85 | 1052 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1053 | if (IS_ERR(task)) |
24ac23ab | 1054 | return PTR_ERR(task); |
24ac23ab TM |
1055 | status = nfs4_wait_for_completion_rpc_task(task); |
1056 | if (status != 0) { | |
1057 | data->cancelled = 1; | |
1058 | smp_wmb(); | |
1059 | } else | |
1060 | status = data->rpc_status; | |
e6b3c4db | 1061 | rpc_put_task(task); |
3e309914 | 1062 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1063 | return status; |
1064 | ||
9936781d TM |
1065 | if (o_res->fh.size == 0) |
1066 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1067 | ||
56ae19f3 TM |
1068 | if (o_arg->open_flags & O_CREAT) { |
1069 | update_changeattr(dir, &o_res->cinfo); | |
1070 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1071 | } else | |
1072 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1073 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1074 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1075 | if (status != 0) |
24ac23ab | 1076 | return status; |
1da177e4 LT |
1077 | } |
1078 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1079 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1080 | return 0; |
1da177e4 LT |
1081 | } |
1082 | ||
10afec90 | 1083 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1084 | { |
7539bbab | 1085 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 1086 | int ret; |
58d9714a | 1087 | |
6b30954e | 1088 | for (;;) { |
65de872e | 1089 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e TM |
1090 | if (ret != 0) |
1091 | return ret; | |
e598d843 TM |
1092 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1093 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1094 | break; |
58d9714a | 1095 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
1096 | } |
1097 | return 0; | |
58d9714a TM |
1098 | } |
1099 | ||
1da177e4 LT |
1100 | /* |
1101 | * OPEN_EXPIRED: | |
1102 | * reclaim state on the server after a network partition. | |
1103 | * Assumes caller holds the appropriate lock | |
1104 | */ | |
539cd03a | 1105 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1106 | { |
e56e0b78 | 1107 | struct nfs4_opendata *opendata; |
864472e9 | 1108 | int ret; |
1da177e4 | 1109 | |
6f220ed5 TM |
1110 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1111 | if (IS_ERR(opendata)) | |
1112 | return PTR_ERR(opendata); | |
864472e9 | 1113 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1114 | if (ret == -ESTALE) |
539cd03a | 1115 | d_drop(ctx->path.dentry); |
c6d00e63 | 1116 | nfs4_opendata_put(opendata); |
864472e9 | 1117 | return ret; |
1da177e4 LT |
1118 | } |
1119 | ||
539cd03a | 1120 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1121 | { |
539cd03a | 1122 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1123 | struct nfs4_exception exception = { }; |
1124 | int err; | |
1125 | ||
1126 | do { | |
539cd03a | 1127 | err = _nfs4_open_expired(ctx, state); |
027b6ca0 TM |
1128 | if (err != -NFS4ERR_DELAY) |
1129 | break; | |
1130 | nfs4_handle_exception(server, err, &exception); | |
202b50dc TM |
1131 | } while (exception.retry); |
1132 | return err; | |
1133 | } | |
1134 | ||
1da177e4 LT |
1135 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1136 | { | |
1da177e4 | 1137 | struct nfs_open_context *ctx; |
864472e9 | 1138 | int ret; |
1da177e4 | 1139 | |
864472e9 TM |
1140 | ctx = nfs4_state_find_open_context(state); |
1141 | if (IS_ERR(ctx)) | |
1142 | return PTR_ERR(ctx); | |
539cd03a | 1143 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1144 | put_nfs_open_context(ctx); |
1145 | return ret; | |
1da177e4 LT |
1146 | } |
1147 | ||
aa53ed54 JL |
1148 | /* |
1149 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1150 | * fields corresponding to attributes that were used to store the verifier. | |
1151 | * Make sure we clobber those fields in the later setattr call | |
1152 | */ | |
1153 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1154 | { | |
1155 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1156 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1157 | sattr->ia_valid |= ATTR_ATIME; | |
1158 | ||
1159 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1160 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1161 | sattr->ia_valid |= ATTR_MTIME; | |
1162 | } | |
1163 | ||
1da177e4 | 1164 | /* |
24ac23ab | 1165 | * Returns a referenced nfs4_state |
1da177e4 | 1166 | */ |
dc0b027d | 1167 | 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 |
1168 | { |
1169 | struct nfs4_state_owner *sp; | |
1170 | struct nfs4_state *state = NULL; | |
1171 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1172 | struct nfs4_opendata *opendata; |
aac00a8d | 1173 | int status; |
1da177e4 LT |
1174 | |
1175 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1176 | status = -ENOMEM; |
1177 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1178 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1179 | goto out_err; | |
1180 | } | |
58d9714a TM |
1181 | status = nfs4_recover_expired_lease(server); |
1182 | if (status != 0) | |
b4454fe1 | 1183 | goto err_put_state_owner; |
aac00a8d | 1184 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1185 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1186 | status = -ENOMEM; |
dc0b027d | 1187 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1188 | if (opendata == NULL) |
95d35cb4 | 1189 | goto err_put_state_owner; |
1da177e4 | 1190 | |
aac00a8d TM |
1191 | if (path->dentry->d_inode != NULL) |
1192 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1193 | ||
24ac23ab | 1194 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1195 | if (status != 0) |
c6d00e63 | 1196 | goto err_opendata_put; |
1da177e4 | 1197 | |
aa53ed54 JL |
1198 | if (opendata->o_arg.open_flags & O_EXCL) |
1199 | nfs4_exclusive_attrset(opendata, sattr); | |
1200 | ||
24ac23ab | 1201 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1202 | status = PTR_ERR(state); |
1203 | if (IS_ERR(state)) | |
c6d00e63 | 1204 | goto err_opendata_put; |
c6d00e63 | 1205 | nfs4_opendata_put(opendata); |
1da177e4 | 1206 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1207 | *res = state; |
1208 | return 0; | |
c6d00e63 TM |
1209 | err_opendata_put: |
1210 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1211 | err_put_state_owner: |
1212 | nfs4_put_state_owner(sp); | |
1da177e4 | 1213 | out_err: |
1da177e4 LT |
1214 | *res = NULL; |
1215 | return status; | |
1216 | } | |
1217 | ||
1218 | ||
dc0b027d | 1219 | 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 |
1220 | { |
1221 | struct nfs4_exception exception = { }; | |
1222 | struct nfs4_state *res; | |
1223 | int status; | |
1224 | ||
1225 | do { | |
dc0b027d | 1226 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1227 | if (status == 0) |
1228 | break; | |
1229 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1230 | * book-keeping w.r.t. state-changing operations | |
1231 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1232 | * It is actually a sign of a bug on the client or on the server. | |
1233 | * | |
1234 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1235 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1236 | * have unhashed the old state_owner for us, and that we can |
1237 | * therefore safely retry using a new one. We should still warn | |
1238 | * the user though... | |
1239 | */ | |
1240 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1241 | printk(KERN_WARNING "NFS: v4 server %s " |
1242 | " returned a bad sequence-id error!\n", | |
1243 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1244 | exception.retry = 1; |
1245 | continue; | |
1246 | } | |
550f5747 TM |
1247 | /* |
1248 | * BAD_STATEID on OPEN means that the server cancelled our | |
1249 | * state before it received the OPEN_CONFIRM. | |
1250 | * Recover by retrying the request as per the discussion | |
1251 | * on Page 181 of RFC3530. | |
1252 | */ | |
1253 | if (status == -NFS4ERR_BAD_STATEID) { | |
1254 | exception.retry = 1; | |
1255 | continue; | |
1256 | } | |
aac00a8d TM |
1257 | if (status == -EAGAIN) { |
1258 | /* We must have found a delegation */ | |
1259 | exception.retry = 1; | |
1260 | continue; | |
1261 | } | |
1da177e4 LT |
1262 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1263 | status, &exception)); | |
1264 | } while (exception.retry); | |
1265 | return res; | |
1266 | } | |
1267 | ||
659bfcd6 TM |
1268 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1269 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1270 | struct nfs4_state *state) | |
1da177e4 | 1271 | { |
3e4f6290 | 1272 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1273 | struct nfs_setattrargs arg = { |
3e4f6290 | 1274 | .fh = NFS_FH(inode), |
1da177e4 LT |
1275 | .iap = sattr, |
1276 | .server = server, | |
1277 | .bitmask = server->attr_bitmask, | |
1278 | }; | |
1279 | struct nfs_setattrres res = { | |
1280 | .fattr = fattr, | |
1281 | .server = server, | |
1282 | }; | |
1283 | struct rpc_message msg = { | |
659bfcd6 TM |
1284 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1285 | .rpc_argp = &arg, | |
1286 | .rpc_resp = &res, | |
1287 | .rpc_cred = cred, | |
1da177e4 | 1288 | }; |
26e976a8 | 1289 | unsigned long timestamp = jiffies; |
65e4308d | 1290 | int status; |
1da177e4 | 1291 | |
0e574af1 | 1292 | nfs_fattr_init(fattr); |
1da177e4 | 1293 | |
3e4f6290 TM |
1294 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1295 | /* Use that stateid */ | |
1296 | } else if (state != NULL) { | |
08e9eac4 TM |
1297 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1298 | } else | |
1da177e4 LT |
1299 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1300 | ||
cccef3b9 | 1301 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1302 | if (status == 0 && state != NULL) |
1303 | renew_lease(server, timestamp); | |
65e4308d | 1304 | return status; |
1da177e4 LT |
1305 | } |
1306 | ||
659bfcd6 TM |
1307 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1308 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1309 | struct nfs4_state *state) | |
1da177e4 | 1310 | { |
3e4f6290 | 1311 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1312 | struct nfs4_exception exception = { }; |
1313 | int err; | |
1314 | do { | |
1315 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1316 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1317 | &exception); |
1318 | } while (exception.retry); | |
1319 | return err; | |
1320 | } | |
1321 | ||
1322 | struct nfs4_closedata { | |
4a35bd41 | 1323 | struct path path; |
1da177e4 LT |
1324 | struct inode *inode; |
1325 | struct nfs4_state *state; | |
1326 | struct nfs_closeargs arg; | |
1327 | struct nfs_closeres res; | |
516a6af6 | 1328 | struct nfs_fattr fattr; |
26e976a8 | 1329 | unsigned long timestamp; |
1da177e4 LT |
1330 | }; |
1331 | ||
963d8fe5 | 1332 | static void nfs4_free_closedata(void *data) |
9512135d | 1333 | { |
963d8fe5 TM |
1334 | struct nfs4_closedata *calldata = data; |
1335 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1336 | |
1337 | nfs4_put_open_state(calldata->state); | |
1338 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1339 | nfs4_put_state_owner(sp); |
31f31db1 | 1340 | path_put(&calldata->path); |
9512135d TM |
1341 | kfree(calldata); |
1342 | } | |
1343 | ||
963d8fe5 | 1344 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1345 | { |
963d8fe5 | 1346 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1347 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1348 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1349 | ||
4ce70ada TM |
1350 | if (RPC_ASSASSINATED(task)) |
1351 | return; | |
1da177e4 LT |
1352 | /* hmm. we are done with the inode, and in the process of freeing |
1353 | * the state_owner. we keep this around to process errors | |
1354 | */ | |
1da177e4 LT |
1355 | switch (task->tk_status) { |
1356 | case 0: | |
45328c35 | 1357 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1358 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1359 | break; |
1360 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1361 | case -NFS4ERR_OLD_STATEID: |
1362 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1363 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1364 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1365 | break; |
1da177e4 | 1366 | default: |
9e33bed5 | 1367 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { |
1da177e4 LT |
1368 | rpc_restart_call(task); |
1369 | return; | |
1370 | } | |
1371 | } | |
516a6af6 | 1372 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1373 | } |
1374 | ||
4ce70ada | 1375 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1376 | { |
4ce70ada | 1377 | struct nfs4_closedata *calldata = data; |
9512135d | 1378 | struct nfs4_state *state = calldata->state; |
003707c7 | 1379 | int clear_rd, clear_wr, clear_rdwr; |
9512135d | 1380 | |
963d8fe5 | 1381 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1382 | return; |
003707c7 | 1383 | |
003707c7 | 1384 | clear_rd = clear_wr = clear_rdwr = 0; |
4cecb76f | 1385 | spin_lock(&state->owner->so_lock); |
003707c7 | 1386 | /* Calculate the change in open mode */ |
e7616923 | 1387 | if (state->n_rdwr == 0) { |
003707c7 | 1388 | if (state->n_rdonly == 0) { |
003707c7 TM |
1389 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
1390 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1391 | } | |
1392 | if (state->n_wronly == 0) { | |
003707c7 TM |
1393 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
1394 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1395 | } | |
e7616923 | 1396 | } |
4cecb76f | 1397 | spin_unlock(&state->owner->so_lock); |
003707c7 | 1398 | if (!clear_rd && !clear_wr && !clear_rdwr) { |
963d8fe5 TM |
1399 | /* Note: exit _without_ calling nfs4_close_done */ |
1400 | task->tk_action = NULL; | |
9512135d TM |
1401 | return; |
1402 | } | |
516a6af6 | 1403 | nfs_fattr_init(calldata->res.fattr); |
45328c35 | 1404 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1405 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1406 | calldata->arg.fmode = FMODE_READ; |
45328c35 | 1407 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1408 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1409 | calldata->arg.fmode = FMODE_WRITE; |
45328c35 | 1410 | } |
26e976a8 | 1411 | calldata->timestamp = jiffies; |
5138fde0 | 1412 | rpc_call_start(task); |
1da177e4 LT |
1413 | } |
1414 | ||
963d8fe5 | 1415 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1416 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1417 | .rpc_call_done = nfs4_close_done, |
1418 | .rpc_release = nfs4_free_closedata, | |
1419 | }; | |
1420 | ||
1da177e4 LT |
1421 | /* |
1422 | * It is possible for data to be read/written from a mem-mapped file | |
1423 | * after the sys_close call (which hits the vfs layer as a flush). | |
1424 | * This means that we can't safely call nfsv4 close on a file until | |
1425 | * the inode is cleared. This in turn means that we are not good | |
1426 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1427 | * share state even when we are done with one of the three share | |
1428 | * stateid's in the inode. | |
1429 | * | |
1430 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1431 | */ | |
a49c3c77 | 1432 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1433 | { |
4a35bd41 | 1434 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1435 | struct nfs4_closedata *calldata; |
b39e625b TM |
1436 | struct nfs4_state_owner *sp = state->owner; |
1437 | struct rpc_task *task; | |
5138fde0 TM |
1438 | struct rpc_message msg = { |
1439 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1440 | .rpc_cred = state->owner->so_cred, | |
1441 | }; | |
c970aa85 TM |
1442 | struct rpc_task_setup task_setup_data = { |
1443 | .rpc_client = server->client, | |
5138fde0 | 1444 | .rpc_message = &msg, |
c970aa85 | 1445 | .callback_ops = &nfs4_close_ops, |
101070ca | 1446 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1447 | .flags = RPC_TASK_ASYNC, |
1448 | }; | |
9512135d | 1449 | int status = -ENOMEM; |
1da177e4 | 1450 | |
9512135d | 1451 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1452 | if (calldata == NULL) |
9512135d | 1453 | goto out; |
4a35bd41 | 1454 | calldata->inode = state->inode; |
1da177e4 | 1455 | calldata->state = state; |
4a35bd41 | 1456 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1457 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1458 | /* Serialization for the sequence id */ |
cee54fc9 | 1459 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1460 | if (calldata->arg.seqid == NULL) |
1461 | goto out_free_calldata; | |
dc0b027d | 1462 | calldata->arg.fmode = 0; |
a65318bf | 1463 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1464 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1465 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1466 | calldata->res.server = server; |
5f7dbd5c | 1467 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
4a35bd41 TM |
1468 | calldata->path.mnt = mntget(path->mnt); |
1469 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1470 | |
5138fde0 TM |
1471 | msg.rpc_argp = &calldata->arg, |
1472 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1473 | task_setup_data.callback_data = calldata; |
1474 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1475 | if (IS_ERR(task)) |
1476 | return PTR_ERR(task); | |
a49c3c77 TM |
1477 | status = 0; |
1478 | if (wait) | |
1479 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1480 | rpc_put_task(task); |
a49c3c77 | 1481 | return status; |
9512135d TM |
1482 | out_free_calldata: |
1483 | kfree(calldata); | |
1484 | out: | |
b39e625b TM |
1485 | nfs4_put_open_state(state); |
1486 | nfs4_put_state_owner(sp); | |
9512135d | 1487 | return status; |
1da177e4 LT |
1488 | } |
1489 | ||
dc0b027d | 1490 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1491 | { |
1492 | struct file *filp; | |
1b45c46c | 1493 | int ret; |
02a913a7 | 1494 | |
1b45c46c | 1495 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1496 | if (fmode & FMODE_EXEC) { |
af22f94a | 1497 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1498 | state->owner->so_cred, |
1499 | nd->intent.open.flags); | |
1500 | if (ret < 0) | |
1501 | goto out_close; | |
1502 | } | |
4a35bd41 | 1503 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1504 | if (!IS_ERR(filp)) { |
1505 | struct nfs_open_context *ctx; | |
cd3758e3 | 1506 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1507 | ctx->state = state; |
95cf959b TM |
1508 | return 0; |
1509 | } | |
1b45c46c TM |
1510 | ret = PTR_ERR(filp); |
1511 | out_close: | |
dc0b027d | 1512 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1513 | return ret; |
02a913a7 TM |
1514 | } |
1515 | ||
1516 | struct dentry * | |
1da177e4 LT |
1517 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1518 | { | |
ad389da7 | 1519 | struct path path = { |
4ac91378 | 1520 | .mnt = nd->path.mnt, |
ad389da7 TM |
1521 | .dentry = dentry, |
1522 | }; | |
4ac91378 | 1523 | struct dentry *parent; |
1da177e4 LT |
1524 | struct iattr attr; |
1525 | struct rpc_cred *cred; | |
1526 | struct nfs4_state *state; | |
02a913a7 | 1527 | struct dentry *res; |
dc0b027d | 1528 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
1529 | |
1530 | if (nd->flags & LOOKUP_CREATE) { | |
1531 | attr.ia_mode = nd->intent.open.create_mode; | |
1532 | attr.ia_valid = ATTR_MODE; | |
1533 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 1534 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
1535 | } else { |
1536 | attr.ia_valid = 0; | |
1537 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1538 | } | |
1539 | ||
98a8e323 | 1540 | cred = rpc_lookup_cred(); |
1da177e4 | 1541 | if (IS_ERR(cred)) |
02a913a7 | 1542 | return (struct dentry *)cred; |
565277f6 TM |
1543 | parent = dentry->d_parent; |
1544 | /* Protect against concurrent sillydeletes */ | |
1545 | nfs_block_sillyrename(parent); | |
dc0b027d | 1546 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1547 | put_rpccred(cred); |
02a913a7 | 1548 | if (IS_ERR(state)) { |
d75340cc | 1549 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 1550 | d_add(dentry, NULL); |
d75340cc TM |
1551 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1552 | } | |
565277f6 | 1553 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
1554 | return (struct dentry *)state; |
1555 | } | |
24ac23ab | 1556 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 1557 | if (res != NULL) |
deee9369 | 1558 | path.dentry = res; |
d75340cc | 1559 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 1560 | nfs_unblock_sillyrename(parent); |
dc0b027d | 1561 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 1562 | return res; |
1da177e4 LT |
1563 | } |
1564 | ||
1565 | int | |
02a913a7 | 1566 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1567 | { |
ad389da7 | 1568 | struct path path = { |
4ac91378 | 1569 | .mnt = nd->path.mnt, |
ad389da7 TM |
1570 | .dentry = dentry, |
1571 | }; | |
1da177e4 LT |
1572 | struct rpc_cred *cred; |
1573 | struct nfs4_state *state; | |
dc0b027d | 1574 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 1575 | |
98a8e323 | 1576 | cred = rpc_lookup_cred(); |
1da177e4 LT |
1577 | if (IS_ERR(cred)) |
1578 | return PTR_ERR(cred); | |
dc0b027d | 1579 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 1580 | put_rpccred(cred); |
02a913a7 TM |
1581 | if (IS_ERR(state)) { |
1582 | switch (PTR_ERR(state)) { | |
1583 | case -EPERM: | |
1584 | case -EACCES: | |
1585 | case -EDQUOT: | |
1586 | case -ENOSPC: | |
1587 | case -EROFS: | |
1588 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1589 | return 1; | |
b87c0adf CL |
1590 | default: |
1591 | goto out_drop; | |
02a913a7 | 1592 | } |
02a913a7 | 1593 | } |
24ac23ab | 1594 | if (state->inode == dentry->d_inode) { |
d75340cc | 1595 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 1596 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
1597 | return 1; |
1598 | } | |
dc0b027d | 1599 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
1600 | out_drop: |
1601 | d_drop(dentry); | |
1da177e4 LT |
1602 | return 0; |
1603 | } | |
1604 | ||
7fe5c398 TM |
1605 | void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
1606 | { | |
1607 | if (ctx->state == NULL) | |
1608 | return; | |
1609 | if (is_sync) | |
1610 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
1611 | else | |
1612 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
1613 | } | |
1da177e4 LT |
1614 | |
1615 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1616 | { | |
43652ad5 BH |
1617 | struct nfs4_server_caps_arg args = { |
1618 | .fhandle = fhandle, | |
1619 | }; | |
1da177e4 LT |
1620 | struct nfs4_server_caps_res res = {}; |
1621 | struct rpc_message msg = { | |
1622 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 1623 | .rpc_argp = &args, |
1da177e4 LT |
1624 | .rpc_resp = &res, |
1625 | }; | |
1626 | int status; | |
1627 | ||
cccef3b9 | 1628 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1629 | if (status == 0) { |
1630 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1631 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1632 | server->caps |= NFS_CAP_ACLS; | |
1633 | if (res.has_links != 0) | |
1634 | server->caps |= NFS_CAP_HARDLINKS; | |
1635 | if (res.has_symlinks != 0) | |
1636 | server->caps |= NFS_CAP_SYMLINKS; | |
a65318bf TM |
1637 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
1638 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
1639 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
1640 | server->acl_bitmask = res.acl_bitmask; |
1641 | } | |
cccef3b9 | 1642 | |
1da177e4 LT |
1643 | return status; |
1644 | } | |
1645 | ||
55a97593 | 1646 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1647 | { |
1648 | struct nfs4_exception exception = { }; | |
1649 | int err; | |
1650 | do { | |
1651 | err = nfs4_handle_exception(server, | |
1652 | _nfs4_server_capabilities(server, fhandle), | |
1653 | &exception); | |
1654 | } while (exception.retry); | |
1655 | return err; | |
1656 | } | |
1657 | ||
1658 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1659 | struct nfs_fsinfo *info) | |
1660 | { | |
1da177e4 LT |
1661 | struct nfs4_lookup_root_arg args = { |
1662 | .bitmask = nfs4_fattr_bitmap, | |
1663 | }; | |
1664 | struct nfs4_lookup_res res = { | |
1665 | .server = server, | |
0e574af1 | 1666 | .fattr = info->fattr, |
1da177e4 LT |
1667 | .fh = fhandle, |
1668 | }; | |
1669 | struct rpc_message msg = { | |
1670 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1671 | .rpc_argp = &args, | |
1672 | .rpc_resp = &res, | |
1673 | }; | |
0e574af1 | 1674 | nfs_fattr_init(info->fattr); |
cccef3b9 | 1675 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1676 | } |
1677 | ||
1678 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1679 | struct nfs_fsinfo *info) | |
1680 | { | |
1681 | struct nfs4_exception exception = { }; | |
1682 | int err; | |
1683 | do { | |
1684 | err = nfs4_handle_exception(server, | |
1685 | _nfs4_lookup_root(server, fhandle, info), | |
1686 | &exception); | |
1687 | } while (exception.retry); | |
1688 | return err; | |
1689 | } | |
1690 | ||
54ceac45 DH |
1691 | /* |
1692 | * get the file handle for the "/" directory on the server | |
1693 | */ | |
1da177e4 | 1694 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1695 | struct nfs_fsinfo *info) |
1da177e4 | 1696 | { |
1da177e4 LT |
1697 | int status; |
1698 | ||
1da177e4 | 1699 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
1700 | if (status == 0) |
1701 | status = nfs4_server_capabilities(server, fhandle); | |
1702 | if (status == 0) | |
1703 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 1704 | return nfs4_map_errors(status); |
1da177e4 LT |
1705 | } |
1706 | ||
6b97fd3d MN |
1707 | /* |
1708 | * Get locations and (maybe) other attributes of a referral. | |
1709 | * Note that we'll actually follow the referral later when | |
1710 | * we detect fsid mismatch in inode revalidation | |
1711 | */ | |
56659e99 | 1712 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
1713 | { |
1714 | int status = -ENOMEM; | |
1715 | struct page *page = NULL; | |
1716 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
1717 | |
1718 | page = alloc_page(GFP_KERNEL); | |
1719 | if (page == NULL) | |
1720 | goto out; | |
1721 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1722 | if (locations == NULL) | |
1723 | goto out; | |
1724 | ||
c228fd3a | 1725 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
1726 | if (status != 0) |
1727 | goto out; | |
1728 | /* Make sure server returned a different fsid for the referral */ | |
1729 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 1730 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
1731 | status = -EIO; |
1732 | goto out; | |
1733 | } | |
1734 | ||
1735 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1736 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1737 | if (!fattr->mode) | |
1738 | fattr->mode = S_IFDIR; | |
1739 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1740 | out: | |
1741 | if (page) | |
1742 | __free_page(page); | |
1743 | if (locations) | |
1744 | kfree(locations); | |
1745 | return status; | |
1746 | } | |
1747 | ||
1da177e4 LT |
1748 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1749 | { | |
1750 | struct nfs4_getattr_arg args = { | |
1751 | .fh = fhandle, | |
1752 | .bitmask = server->attr_bitmask, | |
1753 | }; | |
1754 | struct nfs4_getattr_res res = { | |
1755 | .fattr = fattr, | |
1756 | .server = server, | |
1757 | }; | |
1758 | struct rpc_message msg = { | |
1759 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1760 | .rpc_argp = &args, | |
1761 | .rpc_resp = &res, | |
1762 | }; | |
1763 | ||
0e574af1 | 1764 | nfs_fattr_init(fattr); |
cccef3b9 | 1765 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1766 | } |
1767 | ||
1768 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1769 | { | |
1770 | struct nfs4_exception exception = { }; | |
1771 | int err; | |
1772 | do { | |
1773 | err = nfs4_handle_exception(server, | |
1774 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1775 | &exception); | |
1776 | } while (exception.retry); | |
1777 | return err; | |
1778 | } | |
1779 | ||
1780 | /* | |
1781 | * The file is not closed if it is opened due to the a request to change | |
1782 | * the size of the file. The open call will not be needed once the | |
1783 | * VFS layer lookup-intents are implemented. | |
1784 | * | |
1785 | * Close is called when the inode is destroyed. | |
1786 | * If we haven't opened the file for O_WRONLY, we | |
1787 | * need to in the size_change case to obtain a stateid. | |
1788 | * | |
1789 | * Got race? | |
1790 | * Because OPEN is always done by name in nfsv4, it is | |
1791 | * possible that we opened a different file by the same | |
1792 | * name. We can recognize this race condition, but we | |
1793 | * can't do anything about it besides returning an error. | |
1794 | * | |
1795 | * This will be fixed with VFS changes (lookup-intent). | |
1796 | */ | |
1797 | static int | |
1798 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1799 | struct iattr *sattr) | |
1800 | { | |
08e9eac4 | 1801 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 1802 | struct rpc_cred *cred = NULL; |
d530838b | 1803 | struct nfs4_state *state = NULL; |
1da177e4 LT |
1804 | int status; |
1805 | ||
0e574af1 | 1806 | nfs_fattr_init(fattr); |
1da177e4 | 1807 | |
d530838b | 1808 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
1809 | if (sattr->ia_valid & ATTR_FILE) { |
1810 | struct nfs_open_context *ctx; | |
1811 | ||
1812 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
1813 | if (ctx) { |
1814 | cred = ctx->cred; | |
1815 | state = ctx->state; | |
1816 | } | |
659bfcd6 | 1817 | } |
08e9eac4 | 1818 | |
659bfcd6 | 1819 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
1820 | if (status == 0) |
1821 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
1822 | return status; |
1823 | } | |
1824 | ||
56659e99 TM |
1825 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
1826 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
1827 | struct nfs_fattr *fattr) |
1828 | { | |
1829 | int status; | |
1830 | struct nfs4_lookup_arg args = { | |
1831 | .bitmask = server->attr_bitmask, | |
1832 | .dir_fh = dirfh, | |
1833 | .name = name, | |
1834 | }; | |
1835 | struct nfs4_lookup_res res = { | |
1836 | .server = server, | |
1837 | .fattr = fattr, | |
1838 | .fh = fhandle, | |
1839 | }; | |
1840 | struct rpc_message msg = { | |
1841 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1842 | .rpc_argp = &args, | |
1843 | .rpc_resp = &res, | |
1844 | }; | |
1845 | ||
1846 | nfs_fattr_init(fattr); | |
1847 | ||
1848 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 1849 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 1850 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
1851 | return status; |
1852 | } | |
1853 | ||
1854 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
1855 | struct qstr *name, struct nfs_fh *fhandle, | |
1856 | struct nfs_fattr *fattr) | |
1857 | { | |
1858 | struct nfs4_exception exception = { }; | |
1859 | int err; | |
1860 | do { | |
4e56e082 TM |
1861 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
1862 | /* FIXME: !!!! */ | |
1863 | if (err == -NFS4ERR_MOVED) { | |
1864 | err = -EREMOTE; | |
1865 | break; | |
1866 | } | |
1867 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
1868 | } while (exception.retry); |
1869 | return err; | |
1870 | } | |
1871 | ||
56659e99 | 1872 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
1873 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1874 | { | |
4e56e082 | 1875 | int status; |
1da177e4 LT |
1876 | |
1877 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 1878 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
1879 | if (status == -NFS4ERR_MOVED) |
1880 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
1881 | dprintk("NFS reply lookup: %d\n", status); |
1882 | return status; | |
1883 | } | |
1884 | ||
1885 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1886 | { | |
1887 | struct nfs4_exception exception = { }; | |
1888 | int err; | |
1889 | do { | |
1890 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1891 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1892 | &exception); | |
1893 | } while (exception.retry); | |
1894 | return err; | |
1895 | } | |
1896 | ||
1897 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1898 | { | |
76b32999 TM |
1899 | struct nfs_server *server = NFS_SERVER(inode); |
1900 | struct nfs_fattr fattr; | |
1da177e4 LT |
1901 | struct nfs4_accessargs args = { |
1902 | .fh = NFS_FH(inode), | |
76b32999 TM |
1903 | .bitmask = server->attr_bitmask, |
1904 | }; | |
1905 | struct nfs4_accessres res = { | |
1906 | .server = server, | |
1907 | .fattr = &fattr, | |
1da177e4 | 1908 | }; |
1da177e4 LT |
1909 | struct rpc_message msg = { |
1910 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1911 | .rpc_argp = &args, | |
1912 | .rpc_resp = &res, | |
1913 | .rpc_cred = entry->cred, | |
1914 | }; | |
1915 | int mode = entry->mask; | |
1916 | int status; | |
1917 | ||
1918 | /* | |
1919 | * Determine which access bits we want to ask for... | |
1920 | */ | |
1921 | if (mode & MAY_READ) | |
1922 | args.access |= NFS4_ACCESS_READ; | |
1923 | if (S_ISDIR(inode->i_mode)) { | |
1924 | if (mode & MAY_WRITE) | |
1925 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1926 | if (mode & MAY_EXEC) | |
1927 | args.access |= NFS4_ACCESS_LOOKUP; | |
1928 | } else { | |
1929 | if (mode & MAY_WRITE) | |
1930 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1931 | if (mode & MAY_EXEC) | |
1932 | args.access |= NFS4_ACCESS_EXECUTE; | |
1933 | } | |
76b32999 | 1934 | nfs_fattr_init(&fattr); |
cccef3b9 | 1935 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1936 | if (!status) { |
1937 | entry->mask = 0; | |
1938 | if (res.access & NFS4_ACCESS_READ) | |
1939 | entry->mask |= MAY_READ; | |
1940 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1941 | entry->mask |= MAY_WRITE; | |
1942 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1943 | entry->mask |= MAY_EXEC; | |
76b32999 | 1944 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
1945 | } |
1946 | return status; | |
1947 | } | |
1948 | ||
1949 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1950 | { | |
1951 | struct nfs4_exception exception = { }; | |
1952 | int err; | |
1953 | do { | |
1954 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1955 | _nfs4_proc_access(inode, entry), | |
1956 | &exception); | |
1957 | } while (exception.retry); | |
1958 | return err; | |
1959 | } | |
1960 | ||
1961 | /* | |
1962 | * TODO: For the time being, we don't try to get any attributes | |
1963 | * along with any of the zero-copy operations READ, READDIR, | |
1964 | * READLINK, WRITE. | |
1965 | * | |
1966 | * In the case of the first three, we want to put the GETATTR | |
1967 | * after the read-type operation -- this is because it is hard | |
1968 | * to predict the length of a GETATTR response in v4, and thus | |
1969 | * align the READ data correctly. This means that the GETATTR | |
1970 | * may end up partially falling into the page cache, and we should | |
1971 | * shift it into the 'tail' of the xdr_buf before processing. | |
1972 | * To do this efficiently, we need to know the total length | |
1973 | * of data received, which doesn't seem to be available outside | |
1974 | * of the RPC layer. | |
1975 | * | |
1976 | * In the case of WRITE, we also want to put the GETATTR after | |
1977 | * the operation -- in this case because we want to make sure | |
1978 | * we get the post-operation mtime and size. This means that | |
1979 | * we can't use xdr_encode_pages() as written: we need a variant | |
1980 | * of it which would leave room in the 'tail' iovec. | |
1981 | * | |
1982 | * Both of these changes to the XDR layer would in fact be quite | |
1983 | * minor, but I decided to leave them for a subsequent patch. | |
1984 | */ | |
1985 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1986 | unsigned int pgbase, unsigned int pglen) | |
1987 | { | |
1988 | struct nfs4_readlink args = { | |
1989 | .fh = NFS_FH(inode), | |
1990 | .pgbase = pgbase, | |
1991 | .pglen = pglen, | |
1992 | .pages = &page, | |
1993 | }; | |
f50c7000 | 1994 | struct nfs4_readlink_res res; |
1da177e4 LT |
1995 | struct rpc_message msg = { |
1996 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1997 | .rpc_argp = &args, | |
f50c7000 | 1998 | .rpc_resp = &res, |
1da177e4 LT |
1999 | }; |
2000 | ||
cccef3b9 | 2001 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2002 | } |
2003 | ||
2004 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2005 | unsigned int pgbase, unsigned int pglen) | |
2006 | { | |
2007 | struct nfs4_exception exception = { }; | |
2008 | int err; | |
2009 | do { | |
2010 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2011 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2012 | &exception); | |
2013 | } while (exception.retry); | |
2014 | return err; | |
2015 | } | |
2016 | ||
1da177e4 LT |
2017 | /* |
2018 | * Got race? | |
2019 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2020 | * Until then, this create/open method is prone to inefficiency and race | |
2021 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2022 | * placed on the wire. | |
2023 | * | |
2024 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2025 | * The file will be opened again in the subsequent VFS open call | |
2026 | * (nfs4_proc_file_open). | |
2027 | * | |
2028 | * The open for read will just hang around to be used by any process that | |
2029 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2030 | */ | |
2031 | ||
2032 | static int | |
2033 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2034 | int flags, struct nameidata *nd) |
1da177e4 | 2035 | { |
ad389da7 | 2036 | struct path path = { |
4ac91378 | 2037 | .mnt = nd->path.mnt, |
ad389da7 TM |
2038 | .dentry = dentry, |
2039 | }; | |
1da177e4 LT |
2040 | struct nfs4_state *state; |
2041 | struct rpc_cred *cred; | |
dc0b027d | 2042 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2043 | int status = 0; |
2044 | ||
98a8e323 | 2045 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2046 | if (IS_ERR(cred)) { |
2047 | status = PTR_ERR(cred); | |
2048 | goto out; | |
2049 | } | |
dc0b027d | 2050 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2051 | d_drop(dentry); |
1da177e4 LT |
2052 | if (IS_ERR(state)) { |
2053 | status = PTR_ERR(state); | |
659bfcd6 | 2054 | goto out_putcred; |
1da177e4 | 2055 | } |
d4d9cdcb | 2056 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2057 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2058 | if (flags & O_EXCL) { |
2059 | struct nfs_fattr fattr; | |
659bfcd6 | 2060 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2061 | if (status == 0) |
65e4308d | 2062 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2063 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2064 | } |
ad389da7 | 2065 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2066 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2067 | else |
dc0b027d | 2068 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2069 | out_putcred: |
2070 | put_rpccred(cred); | |
1da177e4 LT |
2071 | out: |
2072 | return status; | |
2073 | } | |
2074 | ||
2075 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2076 | { | |
16e42959 | 2077 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2078 | struct nfs_removeargs args = { |
1da177e4 | 2079 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2080 | .name.len = name->len, |
2081 | .name.name = name->name, | |
16e42959 TM |
2082 | .bitmask = server->attr_bitmask, |
2083 | }; | |
4fdc17b2 | 2084 | struct nfs_removeres res = { |
16e42959 | 2085 | .server = server, |
1da177e4 | 2086 | }; |
1da177e4 | 2087 | struct rpc_message msg = { |
4fdc17b2 TM |
2088 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2089 | .rpc_argp = &args, | |
2090 | .rpc_resp = &res, | |
1da177e4 LT |
2091 | }; |
2092 | int status; | |
2093 | ||
4fdc17b2 | 2094 | nfs_fattr_init(&res.dir_attr); |
cccef3b9 | 2095 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2096 | if (status == 0) { |
2097 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2098 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2099 | } |
1da177e4 LT |
2100 | return status; |
2101 | } | |
2102 | ||
2103 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2104 | { | |
2105 | struct nfs4_exception exception = { }; | |
2106 | int err; | |
2107 | do { | |
2108 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2109 | _nfs4_proc_remove(dir, name), | |
2110 | &exception); | |
2111 | } while (exception.retry); | |
2112 | return err; | |
2113 | } | |
2114 | ||
e4eff1a6 | 2115 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2116 | { |
e4eff1a6 TM |
2117 | struct nfs_server *server = NFS_SERVER(dir); |
2118 | struct nfs_removeargs *args = msg->rpc_argp; | |
2119 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2120 | |
a65318bf | 2121 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2122 | res->server = server; |
1da177e4 | 2123 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2124 | } |
2125 | ||
e4eff1a6 | 2126 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2127 | { |
e4eff1a6 TM |
2128 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2129 | ||
9e33bed5 | 2130 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2131 | return 0; |
2132 | update_changeattr(dir, &res->cinfo); | |
2133 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2134 | return 1; | |
1da177e4 LT |
2135 | } |
2136 | ||
2137 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2138 | struct inode *new_dir, struct qstr *new_name) | |
2139 | { | |
6caf2c82 | 2140 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2141 | struct nfs4_rename_arg arg = { |
2142 | .old_dir = NFS_FH(old_dir), | |
2143 | .new_dir = NFS_FH(new_dir), | |
2144 | .old_name = old_name, | |
2145 | .new_name = new_name, | |
6caf2c82 TM |
2146 | .bitmask = server->attr_bitmask, |
2147 | }; | |
2148 | struct nfs_fattr old_fattr, new_fattr; | |
2149 | struct nfs4_rename_res res = { | |
2150 | .server = server, | |
2151 | .old_fattr = &old_fattr, | |
2152 | .new_fattr = &new_fattr, | |
1da177e4 | 2153 | }; |
1da177e4 LT |
2154 | struct rpc_message msg = { |
2155 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2156 | .rpc_argp = &arg, | |
2157 | .rpc_resp = &res, | |
2158 | }; | |
2159 | int status; | |
2160 | ||
6caf2c82 TM |
2161 | nfs_fattr_init(res.old_fattr); |
2162 | nfs_fattr_init(res.new_fattr); | |
cccef3b9 | 2163 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2164 | |
2165 | if (!status) { | |
2166 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2167 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2168 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2169 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2170 | } |
2171 | return status; | |
2172 | } | |
2173 | ||
2174 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2175 | struct inode *new_dir, struct qstr *new_name) | |
2176 | { | |
2177 | struct nfs4_exception exception = { }; | |
2178 | int err; | |
2179 | do { | |
2180 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2181 | _nfs4_proc_rename(old_dir, old_name, | |
2182 | new_dir, new_name), | |
2183 | &exception); | |
2184 | } while (exception.retry); | |
2185 | return err; | |
2186 | } | |
2187 | ||
2188 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2189 | { | |
91ba2eee | 2190 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2191 | struct nfs4_link_arg arg = { |
2192 | .fh = NFS_FH(inode), | |
2193 | .dir_fh = NFS_FH(dir), | |
2194 | .name = name, | |
91ba2eee TM |
2195 | .bitmask = server->attr_bitmask, |
2196 | }; | |
2197 | struct nfs_fattr fattr, dir_attr; | |
2198 | struct nfs4_link_res res = { | |
2199 | .server = server, | |
2200 | .fattr = &fattr, | |
2201 | .dir_attr = &dir_attr, | |
1da177e4 | 2202 | }; |
1da177e4 LT |
2203 | struct rpc_message msg = { |
2204 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2205 | .rpc_argp = &arg, | |
91ba2eee | 2206 | .rpc_resp = &res, |
1da177e4 LT |
2207 | }; |
2208 | int status; | |
2209 | ||
91ba2eee TM |
2210 | nfs_fattr_init(res.fattr); |
2211 | nfs_fattr_init(res.dir_attr); | |
cccef3b9 | 2212 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2213 | if (!status) { |
2214 | update_changeattr(dir, &res.cinfo); | |
2215 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2216 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2217 | } |
1da177e4 LT |
2218 | |
2219 | return status; | |
2220 | } | |
2221 | ||
2222 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2223 | { | |
2224 | struct nfs4_exception exception = { }; | |
2225 | int err; | |
2226 | do { | |
2227 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2228 | _nfs4_proc_link(inode, dir, name), | |
2229 | &exception); | |
2230 | } while (exception.retry); | |
2231 | return err; | |
2232 | } | |
2233 | ||
57dc9a57 TM |
2234 | struct nfs4_createdata { |
2235 | struct rpc_message msg; | |
2236 | struct nfs4_create_arg arg; | |
2237 | struct nfs4_create_res res; | |
2238 | struct nfs_fh fh; | |
2239 | struct nfs_fattr fattr; | |
2240 | struct nfs_fattr dir_fattr; | |
2241 | }; | |
2242 | ||
2243 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2244 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2245 | { | |
2246 | struct nfs4_createdata *data; | |
2247 | ||
2248 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2249 | if (data != NULL) { | |
2250 | struct nfs_server *server = NFS_SERVER(dir); | |
2251 | ||
2252 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2253 | data->msg.rpc_argp = &data->arg; | |
2254 | data->msg.rpc_resp = &data->res; | |
2255 | data->arg.dir_fh = NFS_FH(dir); | |
2256 | data->arg.server = server; | |
2257 | data->arg.name = name; | |
2258 | data->arg.attrs = sattr; | |
2259 | data->arg.ftype = ftype; | |
2260 | data->arg.bitmask = server->attr_bitmask; | |
2261 | data->res.server = server; | |
2262 | data->res.fh = &data->fh; | |
2263 | data->res.fattr = &data->fattr; | |
2264 | data->res.dir_fattr = &data->dir_fattr; | |
2265 | nfs_fattr_init(data->res.fattr); | |
2266 | nfs_fattr_init(data->res.dir_fattr); | |
2267 | } | |
2268 | return data; | |
2269 | } | |
2270 | ||
2271 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2272 | { | |
cccef3b9 AA |
2273 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2274 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2275 | if (status == 0) { |
2276 | update_changeattr(dir, &data->res.dir_cinfo); | |
2277 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2278 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2279 | } | |
2280 | return status; | |
2281 | } | |
2282 | ||
2283 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2284 | { | |
2285 | kfree(data); | |
2286 | } | |
2287 | ||
4f390c15 | 2288 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2289 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2290 | { |
57dc9a57 TM |
2291 | struct nfs4_createdata *data; |
2292 | int status = -ENAMETOOLONG; | |
1da177e4 | 2293 | |
94a6d753 | 2294 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2295 | goto out; |
4f390c15 | 2296 | |
57dc9a57 TM |
2297 | status = -ENOMEM; |
2298 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2299 | if (data == NULL) | |
2300 | goto out; | |
2301 | ||
2302 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2303 | data->arg.u.symlink.pages = &page; | |
2304 | data->arg.u.symlink.len = len; | |
1da177e4 | 2305 | |
57dc9a57 TM |
2306 | status = nfs4_do_create(dir, dentry, data); |
2307 | ||
2308 | nfs4_free_createdata(data); | |
2309 | out: | |
1da177e4 LT |
2310 | return status; |
2311 | } | |
2312 | ||
4f390c15 | 2313 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2314 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2315 | { |
2316 | struct nfs4_exception exception = { }; | |
2317 | int err; | |
2318 | do { | |
2319 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2320 | _nfs4_proc_symlink(dir, dentry, page, |
2321 | len, sattr), | |
1da177e4 LT |
2322 | &exception); |
2323 | } while (exception.retry); | |
2324 | return err; | |
2325 | } | |
2326 | ||
2327 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2328 | struct iattr *sattr) | |
2329 | { | |
57dc9a57 TM |
2330 | struct nfs4_createdata *data; |
2331 | int status = -ENOMEM; | |
1da177e4 | 2332 | |
57dc9a57 TM |
2333 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2334 | if (data == NULL) | |
2335 | goto out; | |
2336 | ||
2337 | status = nfs4_do_create(dir, dentry, data); | |
2338 | ||
2339 | nfs4_free_createdata(data); | |
2340 | out: | |
1da177e4 LT |
2341 | return status; |
2342 | } | |
2343 | ||
2344 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2345 | struct iattr *sattr) | |
2346 | { | |
2347 | struct nfs4_exception exception = { }; | |
2348 | int err; | |
2349 | do { | |
2350 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2351 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2352 | &exception); | |
2353 | } while (exception.retry); | |
2354 | return err; | |
2355 | } | |
2356 | ||
2357 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2358 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2359 | { | |
2360 | struct inode *dir = dentry->d_inode; | |
2361 | struct nfs4_readdir_arg args = { | |
2362 | .fh = NFS_FH(dir), | |
2363 | .pages = &page, | |
2364 | .pgbase = 0, | |
2365 | .count = count, | |
a65318bf | 2366 | .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, |
1da177e4 LT |
2367 | }; |
2368 | struct nfs4_readdir_res res; | |
2369 | struct rpc_message msg = { | |
2370 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2371 | .rpc_argp = &args, | |
2372 | .rpc_resp = &res, | |
2373 | .rpc_cred = cred, | |
2374 | }; | |
2375 | int status; | |
2376 | ||
3110ff80 | 2377 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2378 | dentry->d_parent->d_name.name, |
2379 | dentry->d_name.name, | |
2380 | (unsigned long long)cookie); | |
1da177e4 LT |
2381 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2382 | res.pgbase = args.pgbase; | |
cccef3b9 | 2383 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2384 | if (status == 0) |
2385 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2386 | |
2387 | nfs_invalidate_atime(dir); | |
2388 | ||
3110ff80 | 2389 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2390 | return status; |
2391 | } | |
2392 | ||
2393 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2394 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2395 | { | |
2396 | struct nfs4_exception exception = { }; | |
2397 | int err; | |
2398 | do { | |
2399 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2400 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2401 | page, count, plus), | |
2402 | &exception); | |
2403 | } while (exception.retry); | |
2404 | return err; | |
2405 | } | |
2406 | ||
2407 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2408 | struct iattr *sattr, dev_t rdev) | |
2409 | { | |
57dc9a57 TM |
2410 | struct nfs4_createdata *data; |
2411 | int mode = sattr->ia_mode; | |
2412 | int status = -ENOMEM; | |
1da177e4 LT |
2413 | |
2414 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2415 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2416 | |
2417 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2418 | if (data == NULL) | |
2419 | goto out; | |
2420 | ||
1da177e4 | 2421 | if (S_ISFIFO(mode)) |
57dc9a57 | 2422 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2423 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2424 | data->arg.ftype = NF4BLK; |
2425 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2426 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2427 | } |
2428 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2429 | data->arg.ftype = NF4CHR; |
2430 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2431 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2432 | } |
1da177e4 | 2433 | |
57dc9a57 TM |
2434 | status = nfs4_do_create(dir, dentry, data); |
2435 | ||
2436 | nfs4_free_createdata(data); | |
2437 | out: | |
1da177e4 LT |
2438 | return status; |
2439 | } | |
2440 | ||
2441 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2442 | struct iattr *sattr, dev_t rdev) | |
2443 | { | |
2444 | struct nfs4_exception exception = { }; | |
2445 | int err; | |
2446 | do { | |
2447 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2448 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2449 | &exception); | |
2450 | } while (exception.retry); | |
2451 | return err; | |
2452 | } | |
2453 | ||
2454 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2455 | struct nfs_fsstat *fsstat) | |
2456 | { | |
2457 | struct nfs4_statfs_arg args = { | |
2458 | .fh = fhandle, | |
2459 | .bitmask = server->attr_bitmask, | |
2460 | }; | |
24ad148a BH |
2461 | struct nfs4_statfs_res res = { |
2462 | .fsstat = fsstat, | |
2463 | }; | |
1da177e4 LT |
2464 | struct rpc_message msg = { |
2465 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2466 | .rpc_argp = &args, | |
24ad148a | 2467 | .rpc_resp = &res, |
1da177e4 LT |
2468 | }; |
2469 | ||
0e574af1 | 2470 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2471 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2472 | } |
2473 | ||
2474 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2475 | { | |
2476 | struct nfs4_exception exception = { }; | |
2477 | int err; | |
2478 | do { | |
2479 | err = nfs4_handle_exception(server, | |
2480 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2481 | &exception); | |
2482 | } while (exception.retry); | |
2483 | return err; | |
2484 | } | |
2485 | ||
2486 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2487 | struct nfs_fsinfo *fsinfo) | |
2488 | { | |
2489 | struct nfs4_fsinfo_arg args = { | |
2490 | .fh = fhandle, | |
2491 | .bitmask = server->attr_bitmask, | |
2492 | }; | |
3dda5e43 BH |
2493 | struct nfs4_fsinfo_res res = { |
2494 | .fsinfo = fsinfo, | |
2495 | }; | |
1da177e4 LT |
2496 | struct rpc_message msg = { |
2497 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2498 | .rpc_argp = &args, | |
3dda5e43 | 2499 | .rpc_resp = &res, |
1da177e4 LT |
2500 | }; |
2501 | ||
cccef3b9 | 2502 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2503 | } |
2504 | ||
2505 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2506 | { | |
2507 | struct nfs4_exception exception = { }; | |
2508 | int err; | |
2509 | ||
2510 | do { | |
2511 | err = nfs4_handle_exception(server, | |
2512 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2513 | &exception); | |
2514 | } while (exception.retry); | |
2515 | return err; | |
2516 | } | |
2517 | ||
2518 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2519 | { | |
0e574af1 | 2520 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2521 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2522 | } | |
2523 | ||
2524 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2525 | struct nfs_pathconf *pathconf) | |
2526 | { | |
2527 | struct nfs4_pathconf_arg args = { | |
2528 | .fh = fhandle, | |
2529 | .bitmask = server->attr_bitmask, | |
2530 | }; | |
d45b2989 BH |
2531 | struct nfs4_pathconf_res res = { |
2532 | .pathconf = pathconf, | |
2533 | }; | |
1da177e4 LT |
2534 | struct rpc_message msg = { |
2535 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2536 | .rpc_argp = &args, | |
d45b2989 | 2537 | .rpc_resp = &res, |
1da177e4 LT |
2538 | }; |
2539 | ||
2540 | /* None of the pathconf attributes are mandatory to implement */ | |
2541 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2542 | memset(pathconf, 0, sizeof(*pathconf)); | |
2543 | return 0; | |
2544 | } | |
2545 | ||
0e574af1 | 2546 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 2547 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2548 | } |
2549 | ||
2550 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2551 | struct nfs_pathconf *pathconf) | |
2552 | { | |
2553 | struct nfs4_exception exception = { }; | |
2554 | int err; | |
2555 | ||
2556 | do { | |
2557 | err = nfs4_handle_exception(server, | |
2558 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2559 | &exception); | |
2560 | } while (exception.retry); | |
2561 | return err; | |
2562 | } | |
2563 | ||
ec06c096 | 2564 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2565 | { |
ec06c096 | 2566 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2567 | |
9e33bed5 | 2568 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
1da177e4 | 2569 | rpc_restart_call(task); |
ec06c096 | 2570 | return -EAGAIN; |
1da177e4 | 2571 | } |
8850df99 TM |
2572 | |
2573 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 2574 | if (task->tk_status > 0) |
ec06c096 TM |
2575 | renew_lease(server, data->timestamp); |
2576 | return 0; | |
1da177e4 LT |
2577 | } |
2578 | ||
bdc7f021 | 2579 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 2580 | { |
1da177e4 | 2581 | data->timestamp = jiffies; |
bdc7f021 | 2582 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
2583 | } |
2584 | ||
788e7a89 | 2585 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2586 | { |
1da177e4 LT |
2587 | struct inode *inode = data->inode; |
2588 | ||
9e33bed5 | 2589 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
1da177e4 | 2590 | rpc_restart_call(task); |
788e7a89 | 2591 | return -EAGAIN; |
1da177e4 | 2592 | } |
4f9838c7 | 2593 | if (task->tk_status >= 0) { |
1da177e4 | 2594 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 2595 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 2596 | } |
788e7a89 | 2597 | return 0; |
1da177e4 LT |
2598 | } |
2599 | ||
bdc7f021 | 2600 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2601 | { |
bdc7f021 TM |
2602 | struct nfs_server *server = NFS_SERVER(data->inode); |
2603 | ||
a65318bf | 2604 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2605 | data->res.server = server; |
1da177e4 LT |
2606 | data->timestamp = jiffies; |
2607 | ||
bdc7f021 | 2608 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
2609 | } |
2610 | ||
788e7a89 | 2611 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2612 | { |
1da177e4 LT |
2613 | struct inode *inode = data->inode; |
2614 | ||
9e33bed5 | 2615 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
1da177e4 | 2616 | rpc_restart_call(task); |
788e7a89 | 2617 | return -EAGAIN; |
1da177e4 | 2618 | } |
9e08a3c5 | 2619 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 2620 | return 0; |
1da177e4 LT |
2621 | } |
2622 | ||
bdc7f021 | 2623 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2624 | { |
788e7a89 | 2625 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2626 | |
a65318bf | 2627 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2628 | data->res.server = server; |
bdc7f021 | 2629 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
2630 | } |
2631 | ||
2632 | /* | |
2633 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2634 | * standalone procedure for queueing an asynchronous RENEW. | |
2635 | */ | |
963d8fe5 | 2636 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2637 | { |
adfa6f98 | 2638 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2639 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2640 | |
2641 | if (task->tk_status < 0) { | |
95baa25c TM |
2642 | /* Unless we're shutting down, schedule state recovery! */ |
2643 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
2644 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
2645 | return; |
2646 | } | |
2647 | spin_lock(&clp->cl_lock); | |
2648 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2649 | clp->cl_last_renewal = timestamp; | |
2650 | spin_unlock(&clp->cl_lock); | |
2651 | } | |
2652 | ||
963d8fe5 TM |
2653 | static const struct rpc_call_ops nfs4_renew_ops = { |
2654 | .rpc_call_done = nfs4_renew_done, | |
2655 | }; | |
2656 | ||
adfa6f98 | 2657 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2658 | { |
2659 | struct rpc_message msg = { | |
2660 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2661 | .rpc_argp = clp, | |
b4454fe1 | 2662 | .rpc_cred = cred, |
1da177e4 LT |
2663 | }; |
2664 | ||
2665 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2666 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2667 | } |
2668 | ||
adfa6f98 | 2669 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2670 | { |
2671 | struct rpc_message msg = { | |
2672 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2673 | .rpc_argp = clp, | |
b4454fe1 | 2674 | .rpc_cred = cred, |
1da177e4 LT |
2675 | }; |
2676 | unsigned long now = jiffies; | |
2677 | int status; | |
2678 | ||
2679 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2680 | if (status < 0) | |
2681 | return status; | |
2682 | spin_lock(&clp->cl_lock); | |
2683 | if (time_before(clp->cl_last_renewal,now)) | |
2684 | clp->cl_last_renewal = now; | |
2685 | spin_unlock(&clp->cl_lock); | |
2686 | return 0; | |
2687 | } | |
2688 | ||
aa1870af BF |
2689 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2690 | { | |
2691 | return (server->caps & NFS_CAP_ACLS) | |
2692 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2693 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2694 | } | |
2695 | ||
2696 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2697 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2698 | * the stack. | |
2699 | */ | |
2700 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2701 | ||
2702 | static void buf_to_pages(const void *buf, size_t buflen, | |
2703 | struct page **pages, unsigned int *pgbase) | |
2704 | { | |
2705 | const void *p = buf; | |
2706 | ||
2707 | *pgbase = offset_in_page(buf); | |
2708 | p -= *pgbase; | |
2709 | while (p < buf + buflen) { | |
2710 | *(pages++) = virt_to_page(p); | |
2711 | p += PAGE_CACHE_SIZE; | |
2712 | } | |
2713 | } | |
2714 | ||
e50a1c2e BF |
2715 | struct nfs4_cached_acl { |
2716 | int cached; | |
2717 | size_t len; | |
3e9d4154 | 2718 | char data[0]; |
e50a1c2e BF |
2719 | }; |
2720 | ||
2721 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2722 | { | |
2723 | struct nfs_inode *nfsi = NFS_I(inode); | |
2724 | ||
2725 | spin_lock(&inode->i_lock); | |
2726 | kfree(nfsi->nfs4_acl); | |
2727 | nfsi->nfs4_acl = acl; | |
2728 | spin_unlock(&inode->i_lock); | |
2729 | } | |
2730 | ||
2731 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2732 | { | |
2733 | nfs4_set_cached_acl(inode, NULL); | |
2734 | } | |
2735 | ||
2736 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2737 | { | |
2738 | struct nfs_inode *nfsi = NFS_I(inode); | |
2739 | struct nfs4_cached_acl *acl; | |
2740 | int ret = -ENOENT; | |
2741 | ||
2742 | spin_lock(&inode->i_lock); | |
2743 | acl = nfsi->nfs4_acl; | |
2744 | if (acl == NULL) | |
2745 | goto out; | |
2746 | if (buf == NULL) /* user is just asking for length */ | |
2747 | goto out_len; | |
2748 | if (acl->cached == 0) | |
2749 | goto out; | |
2750 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2751 | if (acl->len > buflen) | |
2752 | goto out; | |
2753 | memcpy(buf, acl->data, acl->len); | |
2754 | out_len: | |
2755 | ret = acl->len; | |
2756 | out: | |
2757 | spin_unlock(&inode->i_lock); | |
2758 | return ret; | |
2759 | } | |
2760 | ||
2761 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2762 | { | |
2763 | struct nfs4_cached_acl *acl; | |
2764 | ||
2765 | if (buf && acl_len <= PAGE_SIZE) { | |
2766 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2767 | if (acl == NULL) | |
2768 | goto out; | |
2769 | acl->cached = 1; | |
2770 | memcpy(acl->data, buf, acl_len); | |
2771 | } else { | |
2772 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2773 | if (acl == NULL) | |
2774 | goto out; | |
2775 | acl->cached = 0; | |
2776 | } | |
2777 | acl->len = acl_len; | |
2778 | out: | |
2779 | nfs4_set_cached_acl(inode, acl); | |
2780 | } | |
2781 | ||
16b4289c | 2782 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 2783 | { |
aa1870af BF |
2784 | struct page *pages[NFS4ACL_MAXPAGES]; |
2785 | struct nfs_getaclargs args = { | |
2786 | .fh = NFS_FH(inode), | |
2787 | .acl_pages = pages, | |
2788 | .acl_len = buflen, | |
2789 | }; | |
663c79b3 BH |
2790 | struct nfs_getaclres res = { |
2791 | .acl_len = buflen, | |
2792 | }; | |
e50a1c2e | 2793 | void *resp_buf; |
aa1870af BF |
2794 | struct rpc_message msg = { |
2795 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2796 | .rpc_argp = &args, | |
663c79b3 | 2797 | .rpc_resp = &res, |
aa1870af | 2798 | }; |
e50a1c2e | 2799 | struct page *localpage = NULL; |
aa1870af BF |
2800 | int ret; |
2801 | ||
e50a1c2e BF |
2802 | if (buflen < PAGE_SIZE) { |
2803 | /* As long as we're doing a round trip to the server anyway, | |
2804 | * let's be prepared for a page of acl data. */ | |
2805 | localpage = alloc_page(GFP_KERNEL); | |
2806 | resp_buf = page_address(localpage); | |
2807 | if (localpage == NULL) | |
2808 | return -ENOMEM; | |
2809 | args.acl_pages[0] = localpage; | |
2810 | args.acl_pgbase = 0; | |
663c79b3 | 2811 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2812 | } else { |
2813 | resp_buf = buf; | |
2814 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2815 | } | |
cccef3b9 | 2816 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
2817 | if (ret) |
2818 | goto out_free; | |
663c79b3 BH |
2819 | if (res.acl_len > args.acl_len) |
2820 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 2821 | else |
663c79b3 | 2822 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
2823 | if (buf) { |
2824 | ret = -ERANGE; | |
663c79b3 | 2825 | if (res.acl_len > buflen) |
e50a1c2e BF |
2826 | goto out_free; |
2827 | if (localpage) | |
663c79b3 | 2828 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 2829 | } |
663c79b3 | 2830 | ret = res.acl_len; |
e50a1c2e BF |
2831 | out_free: |
2832 | if (localpage) | |
2833 | __free_page(localpage); | |
aa1870af BF |
2834 | return ret; |
2835 | } | |
2836 | ||
16b4289c TM |
2837 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
2838 | { | |
2839 | struct nfs4_exception exception = { }; | |
2840 | ssize_t ret; | |
2841 | do { | |
2842 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
2843 | if (ret >= 0) | |
2844 | break; | |
2845 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
2846 | } while (exception.retry); | |
2847 | return ret; | |
2848 | } | |
2849 | ||
e50a1c2e BF |
2850 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2851 | { | |
2852 | struct nfs_server *server = NFS_SERVER(inode); | |
2853 | int ret; | |
2854 | ||
2855 | if (!nfs4_server_supports_acls(server)) | |
2856 | return -EOPNOTSUPP; | |
2857 | ret = nfs_revalidate_inode(server, inode); | |
2858 | if (ret < 0) | |
2859 | return ret; | |
f41f7418 TM |
2860 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
2861 | nfs_zap_acl_cache(inode); | |
e50a1c2e BF |
2862 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
2863 | if (ret != -ENOENT) | |
2864 | return ret; | |
2865 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2866 | } | |
2867 | ||
16b4289c | 2868 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
2869 | { |
2870 | struct nfs_server *server = NFS_SERVER(inode); | |
2871 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2872 | struct nfs_setaclargs arg = { | |
2873 | .fh = NFS_FH(inode), | |
2874 | .acl_pages = pages, | |
2875 | .acl_len = buflen, | |
2876 | }; | |
73c403a9 | 2877 | struct nfs_setaclres res; |
4b580ee3 BF |
2878 | struct rpc_message msg = { |
2879 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2880 | .rpc_argp = &arg, | |
73c403a9 | 2881 | .rpc_resp = &res, |
4b580ee3 BF |
2882 | }; |
2883 | int ret; | |
2884 | ||
2885 | if (!nfs4_server_supports_acls(server)) | |
2886 | return -EOPNOTSUPP; | |
642ac549 | 2887 | nfs_inode_return_delegation(inode); |
4b580ee3 | 2888 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 2889 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
2890 | nfs_access_zap_cache(inode); |
2891 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
2892 | return ret; |
2893 | } | |
2894 | ||
16b4289c TM |
2895 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2896 | { | |
2897 | struct nfs4_exception exception = { }; | |
2898 | int err; | |
2899 | do { | |
2900 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2901 | __nfs4_proc_set_acl(inode, buf, buflen), | |
2902 | &exception); | |
2903 | } while (exception.retry); | |
2904 | return err; | |
2905 | } | |
2906 | ||
1da177e4 | 2907 | static int |
9e33bed5 | 2908 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 2909 | { |
7539bbab | 2910 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2911 | |
2912 | if (!clp || task->tk_status >= 0) | |
2913 | return 0; | |
2914 | switch(task->tk_status) { | |
9e33bed5 TM |
2915 | case -NFS4ERR_ADMIN_REVOKED: |
2916 | case -NFS4ERR_BAD_STATEID: | |
2917 | case -NFS4ERR_OPENMODE: | |
2918 | if (state == NULL) | |
2919 | break; | |
2920 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1da177e4 LT |
2921 | case -NFS4ERR_STALE_CLIENTID: |
2922 | case -NFS4ERR_STALE_STATEID: | |
2923 | case -NFS4ERR_EXPIRED: | |
5d00837b | 2924 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
1da177e4 | 2925 | nfs4_schedule_state_recovery(clp); |
e005e804 | 2926 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
fda13939 | 2927 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
1da177e4 LT |
2928 | task->tk_status = 0; |
2929 | return -EAGAIN; | |
1da177e4 | 2930 | case -NFS4ERR_DELAY: |
2e96d286 | 2931 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 2932 | case -NFS4ERR_GRACE: |
1da177e4 LT |
2933 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
2934 | task->tk_status = 0; | |
2935 | return -EAGAIN; | |
2936 | case -NFS4ERR_OLD_STATEID: | |
2937 | task->tk_status = 0; | |
2938 | return -EAGAIN; | |
2939 | } | |
2940 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2941 | return 0; | |
2942 | } | |
2943 | ||
adfa6f98 | 2944 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
2945 | { |
2946 | nfs4_verifier sc_verifier; | |
2947 | struct nfs4_setclientid setclientid = { | |
2948 | .sc_verifier = &sc_verifier, | |
2949 | .sc_prog = program, | |
2950 | }; | |
2951 | struct rpc_message msg = { | |
2952 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2953 | .rpc_argp = &setclientid, | |
2954 | .rpc_resp = clp, | |
286d7d6a | 2955 | .rpc_cred = cred, |
1da177e4 | 2956 | }; |
bc4785cd | 2957 | __be32 *p; |
1da177e4 LT |
2958 | int loop = 0; |
2959 | int status; | |
2960 | ||
bc4785cd | 2961 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
2962 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
2963 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2964 | ||
2965 | for(;;) { | |
2966 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 2967 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
2968 | clp->cl_ipaddr, |
2969 | rpc_peeraddr2str(clp->cl_rpcclient, | |
2970 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
2971 | rpc_peeraddr2str(clp->cl_rpcclient, |
2972 | RPC_DISPLAY_PROTO), | |
78ea323b | 2973 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
2974 | clp->cl_id_uniquifier); |
2975 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
2976 | sizeof(setclientid.sc_netid), |
2977 | rpc_peeraddr2str(clp->cl_rpcclient, | |
2978 | RPC_DISPLAY_NETID)); | |
1da177e4 | 2979 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 2980 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
2981 | clp->cl_ipaddr, port >> 8, port & 255); |
2982 | ||
2983 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2984 | if (status != -NFS4ERR_CLID_INUSE) | |
2985 | break; | |
2986 | if (signalled()) | |
2987 | break; | |
2988 | if (loop++ & 1) | |
2989 | ssleep(clp->cl_lease_time + 1); | |
2990 | else | |
2991 | if (++clp->cl_id_uniquifier == 0) | |
2992 | break; | |
2993 | } | |
2994 | return status; | |
2995 | } | |
2996 | ||
adfa6f98 | 2997 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2998 | { |
2999 | struct nfs_fsinfo fsinfo; | |
3000 | struct rpc_message msg = { | |
3001 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3002 | .rpc_argp = clp, | |
3003 | .rpc_resp = &fsinfo, | |
286d7d6a | 3004 | .rpc_cred = cred, |
1da177e4 LT |
3005 | }; |
3006 | unsigned long now; | |
3007 | int status; | |
3008 | ||
3009 | now = jiffies; | |
3010 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3011 | if (status == 0) { | |
3012 | spin_lock(&clp->cl_lock); | |
3013 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3014 | clp->cl_last_renewal = now; | |
3015 | spin_unlock(&clp->cl_lock); | |
3016 | } | |
3017 | return status; | |
3018 | } | |
3019 | ||
adfa6f98 | 3020 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 3021 | { |
77e03677 | 3022 | long timeout = 0; |
51581f3b TM |
3023 | int err; |
3024 | do { | |
3025 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3026 | switch (err) { | |
3027 | case 0: | |
3028 | return err; | |
3029 | case -NFS4ERR_RESOURCE: | |
3030 | /* The IBM lawyers misread another document! */ | |
3031 | case -NFS4ERR_DELAY: | |
3032 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3033 | } | |
3034 | } while (err == 0); | |
3035 | return err; | |
3036 | } | |
3037 | ||
fe650407 TM |
3038 | struct nfs4_delegreturndata { |
3039 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3040 | struct nfs4_delegreturnres res; |
fe650407 TM |
3041 | struct nfs_fh fh; |
3042 | nfs4_stateid stateid; | |
26e976a8 | 3043 | unsigned long timestamp; |
fa178f29 | 3044 | struct nfs_fattr fattr; |
fe650407 TM |
3045 | int rpc_status; |
3046 | }; | |
3047 | ||
fe650407 TM |
3048 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3049 | { | |
3050 | struct nfs4_delegreturndata *data = calldata; | |
3051 | data->rpc_status = task->tk_status; | |
26e976a8 | 3052 | if (data->rpc_status == 0) |
fa178f29 | 3053 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
3054 | } |
3055 | ||
3056 | static void nfs4_delegreturn_release(void *calldata) | |
3057 | { | |
fe650407 TM |
3058 | kfree(calldata); |
3059 | } | |
3060 | ||
c8d149f3 | 3061 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
fe650407 TM |
3062 | .rpc_call_done = nfs4_delegreturn_done, |
3063 | .rpc_release = nfs4_delegreturn_release, | |
3064 | }; | |
3065 | ||
e6f81075 | 3066 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3067 | { |
3068 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3069 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3070 | struct rpc_task *task; |
5138fde0 TM |
3071 | struct rpc_message msg = { |
3072 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3073 | .rpc_cred = cred, | |
3074 | }; | |
c970aa85 TM |
3075 | struct rpc_task_setup task_setup_data = { |
3076 | .rpc_client = server->client, | |
5138fde0 | 3077 | .rpc_message = &msg, |
c970aa85 TM |
3078 | .callback_ops = &nfs4_delegreturn_ops, |
3079 | .flags = RPC_TASK_ASYNC, | |
3080 | }; | |
e6f81075 | 3081 | int status = 0; |
fe650407 TM |
3082 | |
3083 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
3084 | if (data == NULL) | |
3085 | return -ENOMEM; | |
3086 | data->args.fhandle = &data->fh; | |
3087 | data->args.stateid = &data->stateid; | |
fa178f29 | 3088 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3089 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3090 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3091 | data->res.fattr = &data->fattr; |
3092 | data->res.server = server; | |
5f7dbd5c | 3093 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3094 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3095 | data->timestamp = jiffies; |
fe650407 TM |
3096 | data->rpc_status = 0; |
3097 | ||
c970aa85 | 3098 | task_setup_data.callback_data = data; |
5138fde0 TM |
3099 | msg.rpc_argp = &data->args, |
3100 | msg.rpc_resp = &data->res, | |
c970aa85 | 3101 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3102 | if (IS_ERR(task)) |
fe650407 | 3103 | return PTR_ERR(task); |
e6f81075 TM |
3104 | if (!issync) |
3105 | goto out; | |
fe650407 | 3106 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3107 | if (status != 0) |
3108 | goto out; | |
3109 | status = data->rpc_status; | |
3110 | if (status != 0) | |
3111 | goto out; | |
3112 | nfs_refresh_inode(inode, &data->fattr); | |
3113 | out: | |
e6b3c4db | 3114 | rpc_put_task(task); |
fe650407 | 3115 | return status; |
1da177e4 LT |
3116 | } |
3117 | ||
e6f81075 | 3118 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3119 | { |
3120 | struct nfs_server *server = NFS_SERVER(inode); | |
3121 | struct nfs4_exception exception = { }; | |
3122 | int err; | |
3123 | do { | |
e6f81075 | 3124 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3125 | switch (err) { |
3126 | case -NFS4ERR_STALE_STATEID: | |
3127 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3128 | case 0: |
3129 | return 0; | |
3130 | } | |
3131 | err = nfs4_handle_exception(server, err, &exception); | |
3132 | } while (exception.retry); | |
3133 | return err; | |
3134 | } | |
3135 | ||
3136 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3137 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3138 | ||
3139 | /* | |
3140 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3141 | */ | |
3142 | static unsigned long | |
3143 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3144 | { | |
150030b7 | 3145 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3146 | timeout <<= 1; |
3147 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3148 | return NFS4_LOCK_MAXTIMEOUT; | |
3149 | return timeout; | |
3150 | } | |
3151 | ||
1da177e4 LT |
3152 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3153 | { | |
3154 | struct inode *inode = state->inode; | |
3155 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3156 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3157 | struct nfs_lockt_args arg = { |
1da177e4 | 3158 | .fh = NFS_FH(inode), |
911d1aaf | 3159 | .fl = request, |
1da177e4 | 3160 | }; |
911d1aaf TM |
3161 | struct nfs_lockt_res res = { |
3162 | .denied = request, | |
1da177e4 LT |
3163 | }; |
3164 | struct rpc_message msg = { | |
3165 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3166 | .rpc_argp = &arg, | |
3167 | .rpc_resp = &res, | |
3168 | .rpc_cred = state->owner->so_cred, | |
3169 | }; | |
1da177e4 LT |
3170 | struct nfs4_lock_state *lsp; |
3171 | int status; | |
3172 | ||
911d1aaf | 3173 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3174 | status = nfs4_set_lock_state(state, request); |
3175 | if (status != 0) | |
3176 | goto out; | |
3177 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3178 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3179 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3180 | switch (status) { |
3181 | case 0: | |
3182 | request->fl_type = F_UNLCK; | |
3183 | break; | |
3184 | case -NFS4ERR_DENIED: | |
3185 | status = 0; | |
1da177e4 | 3186 | } |
70cc6487 | 3187 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3188 | out: |
1da177e4 LT |
3189 | return status; |
3190 | } | |
3191 | ||
3192 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3193 | { | |
3194 | struct nfs4_exception exception = { }; | |
3195 | int err; | |
3196 | ||
3197 | do { | |
3198 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3199 | _nfs4_proc_getlk(state, cmd, request), | |
3200 | &exception); | |
3201 | } while (exception.retry); | |
3202 | return err; | |
3203 | } | |
3204 | ||
3205 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3206 | { | |
3207 | int res = 0; | |
3208 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3209 | case FL_POSIX: | |
3210 | res = posix_lock_file_wait(file, fl); | |
3211 | break; | |
3212 | case FL_FLOCK: | |
3213 | res = flock_lock_file_wait(file, fl); | |
3214 | break; | |
3215 | default: | |
3216 | BUG(); | |
3217 | } | |
1da177e4 LT |
3218 | return res; |
3219 | } | |
3220 | ||
faf5f49c | 3221 | struct nfs4_unlockdata { |
911d1aaf TM |
3222 | struct nfs_locku_args arg; |
3223 | struct nfs_locku_res res; | |
faf5f49c TM |
3224 | struct nfs4_lock_state *lsp; |
3225 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3226 | struct file_lock fl; |
3227 | const struct nfs_server *server; | |
26e976a8 | 3228 | unsigned long timestamp; |
faf5f49c TM |
3229 | }; |
3230 | ||
911d1aaf TM |
3231 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3232 | struct nfs_open_context *ctx, | |
3233 | struct nfs4_lock_state *lsp, | |
3234 | struct nfs_seqid *seqid) | |
3235 | { | |
3236 | struct nfs4_unlockdata *p; | |
3237 | struct inode *inode = lsp->ls_state->inode; | |
3238 | ||
3239 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3240 | if (p == NULL) | |
3241 | return NULL; | |
3242 | p->arg.fh = NFS_FH(inode); | |
3243 | p->arg.fl = &p->fl; | |
3244 | p->arg.seqid = seqid; | |
c1d51931 | 3245 | p->res.seqid = seqid; |
5f7dbd5c | 3246 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3247 | p->arg.stateid = &lsp->ls_stateid; |
3248 | p->lsp = lsp; | |
3249 | atomic_inc(&lsp->ls_count); | |
3250 | /* Ensure we don't close file until we're done freeing locks! */ | |
3251 | p->ctx = get_nfs_open_context(ctx); | |
3252 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3253 | p->server = NFS_SERVER(inode); | |
3254 | return p; | |
3255 | } | |
3256 | ||
06f814a3 | 3257 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3258 | { |
963d8fe5 | 3259 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3260 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3261 | nfs4_put_lock_state(calldata->lsp); |
3262 | put_nfs_open_context(calldata->ctx); | |
3263 | kfree(calldata); | |
faf5f49c TM |
3264 | } |
3265 | ||
963d8fe5 | 3266 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3267 | { |
963d8fe5 | 3268 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3269 | |
06f814a3 TM |
3270 | if (RPC_ASSASSINATED(task)) |
3271 | return; | |
faf5f49c TM |
3272 | switch (task->tk_status) { |
3273 | case 0: | |
3274 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3275 | calldata->res.stateid.data, |
faf5f49c | 3276 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3277 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3278 | break; |
9e33bed5 TM |
3279 | case -NFS4ERR_BAD_STATEID: |
3280 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3281 | case -NFS4ERR_STALE_STATEID: |
3282 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3283 | break; |
3284 | default: | |
9e33bed5 | 3285 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
faf5f49c | 3286 | rpc_restart_call(task); |
faf5f49c | 3287 | } |
faf5f49c TM |
3288 | } |
3289 | ||
4ce70ada | 3290 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3291 | { |
4ce70ada | 3292 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3293 | |
911d1aaf | 3294 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3295 | return; |
3296 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3297 | /* Note: exit _without_ running nfs4_locku_done */ |
3298 | task->tk_action = NULL; | |
faf5f49c TM |
3299 | return; |
3300 | } | |
26e976a8 | 3301 | calldata->timestamp = jiffies; |
5138fde0 | 3302 | rpc_call_start(task); |
faf5f49c TM |
3303 | } |
3304 | ||
963d8fe5 | 3305 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3306 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3307 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3308 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3309 | }; |
3310 | ||
a5d16a4d TM |
3311 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3312 | struct nfs_open_context *ctx, | |
3313 | struct nfs4_lock_state *lsp, | |
3314 | struct nfs_seqid *seqid) | |
3315 | { | |
3316 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3317 | struct rpc_message msg = { |
3318 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3319 | .rpc_cred = ctx->cred, | |
3320 | }; | |
c970aa85 TM |
3321 | struct rpc_task_setup task_setup_data = { |
3322 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3323 | .rpc_message = &msg, |
c970aa85 | 3324 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3325 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3326 | .flags = RPC_TASK_ASYNC, |
3327 | }; | |
a5d16a4d | 3328 | |
137d6aca FF |
3329 | /* Ensure this is an unlock - when canceling a lock, the |
3330 | * canceled lock is passed in, and it won't be an unlock. | |
3331 | */ | |
3332 | fl->fl_type = F_UNLCK; | |
3333 | ||
a5d16a4d TM |
3334 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3335 | if (data == NULL) { | |
3336 | nfs_free_seqid(seqid); | |
3337 | return ERR_PTR(-ENOMEM); | |
3338 | } | |
3339 | ||
5138fde0 TM |
3340 | msg.rpc_argp = &data->arg, |
3341 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3342 | task_setup_data.callback_data = data; |
3343 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3344 | } |
3345 | ||
faf5f49c TM |
3346 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3347 | { | |
19e03c57 | 3348 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3349 | struct nfs_seqid *seqid; |
1da177e4 | 3350 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3351 | struct rpc_task *task; |
3352 | int status = 0; | |
536ff0f8 | 3353 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3354 | |
8d0a8a9d | 3355 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3356 | /* Unlock _before_ we do the RPC call */ |
3357 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3358 | down_read(&nfsi->rwsem); |
3359 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3360 | up_read(&nfsi->rwsem); | |
9b073574 | 3361 | goto out; |
19e03c57 TM |
3362 | } |
3363 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3364 | if (status != 0) |
9b073574 TM |
3365 | goto out; |
3366 | /* Is this a delegated lock? */ | |
3367 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3368 | goto out; | |
8d0a8a9d | 3369 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3370 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3371 | status = -ENOMEM; |
911d1aaf | 3372 | if (seqid == NULL) |
9b073574 | 3373 | goto out; |
cd3758e3 | 3374 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3375 | status = PTR_ERR(task); |
3376 | if (IS_ERR(task)) | |
9b073574 | 3377 | goto out; |
a5d16a4d | 3378 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3379 | rpc_put_task(task); |
9b073574 | 3380 | out: |
536ff0f8 | 3381 | request->fl_flags = fl_flags; |
1da177e4 LT |
3382 | return status; |
3383 | } | |
3384 | ||
a5d16a4d TM |
3385 | struct nfs4_lockdata { |
3386 | struct nfs_lock_args arg; | |
3387 | struct nfs_lock_res res; | |
3388 | struct nfs4_lock_state *lsp; | |
3389 | struct nfs_open_context *ctx; | |
3390 | struct file_lock fl; | |
26e976a8 | 3391 | unsigned long timestamp; |
a5d16a4d TM |
3392 | int rpc_status; |
3393 | int cancelled; | |
3394 | }; | |
3395 | ||
3396 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3397 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3398 | { |
a5d16a4d TM |
3399 | struct nfs4_lockdata *p; |
3400 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3401 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3402 | |
3403 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3404 | if (p == NULL) | |
3405 | return NULL; | |
3406 | ||
3407 | p->arg.fh = NFS_FH(inode); | |
3408 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
3409 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
3410 | if (p->arg.open_seqid == NULL) | |
3411 | goto out_free; | |
a5d16a4d TM |
3412 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3413 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 3414 | goto out_free_seqid; |
a5d16a4d | 3415 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3416 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3417 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3418 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 3419 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d TM |
3420 | p->lsp = lsp; |
3421 | atomic_inc(&lsp->ls_count); | |
3422 | p->ctx = get_nfs_open_context(ctx); | |
3423 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3424 | return p; | |
2f74c0a0 TM |
3425 | out_free_seqid: |
3426 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3427 | out_free: |
3428 | kfree(p); | |
3429 | return NULL; | |
3430 | } | |
3431 | ||
3432 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3433 | { | |
3434 | struct nfs4_lockdata *data = calldata; | |
3435 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3436 | |
3110ff80 | 3437 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3438 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3439 | return; | |
a5d16a4d TM |
3440 | /* Do we need to do an open_to_lock_owner? */ |
3441 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3442 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3443 | return; | |
a5d16a4d TM |
3444 | data->arg.open_stateid = &state->stateid; |
3445 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3446 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3447 | } else |
3448 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3449 | data->timestamp = jiffies; |
5138fde0 | 3450 | rpc_call_start(task); |
3110ff80 | 3451 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3452 | } |
3453 | ||
3454 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3455 | { | |
3456 | struct nfs4_lockdata *data = calldata; | |
3457 | ||
3110ff80 | 3458 | dprintk("%s: begin!\n", __func__); |
a5d16a4d TM |
3459 | |
3460 | data->rpc_status = task->tk_status; | |
3461 | if (RPC_ASSASSINATED(task)) | |
3462 | goto out; | |
3463 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
3464 | if (data->rpc_status == 0) |
3465 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3466 | else | |
3467 | goto out; | |
3468 | } | |
3469 | if (data->rpc_status == 0) { | |
3470 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3471 | sizeof(data->lsp->ls_stateid.data)); | |
3472 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3473 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 3474 | } |
a5d16a4d | 3475 | out: |
3110ff80 | 3476 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
3477 | } |
3478 | ||
3479 | static void nfs4_lock_release(void *calldata) | |
3480 | { | |
3481 | struct nfs4_lockdata *data = calldata; | |
3482 | ||
3110ff80 | 3483 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 3484 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
3485 | if (data->cancelled != 0) { |
3486 | struct rpc_task *task; | |
3487 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3488 | data->arg.lock_seqid); | |
3489 | if (!IS_ERR(task)) | |
e6b3c4db | 3490 | rpc_put_task(task); |
3110ff80 | 3491 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
3492 | } else |
3493 | nfs_free_seqid(data->arg.lock_seqid); | |
3494 | nfs4_put_lock_state(data->lsp); | |
3495 | put_nfs_open_context(data->ctx); | |
3496 | kfree(data); | |
3110ff80 | 3497 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
3498 | } |
3499 | ||
3500 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3501 | .rpc_call_prepare = nfs4_lock_prepare, | |
3502 | .rpc_call_done = nfs4_lock_done, | |
3503 | .rpc_release = nfs4_lock_release, | |
3504 | }; | |
3505 | ||
3506 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3507 | { | |
3508 | struct nfs4_lockdata *data; | |
3509 | struct rpc_task *task; | |
5138fde0 TM |
3510 | struct rpc_message msg = { |
3511 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3512 | .rpc_cred = state->owner->so_cred, | |
3513 | }; | |
c970aa85 TM |
3514 | struct rpc_task_setup task_setup_data = { |
3515 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 3516 | .rpc_message = &msg, |
c970aa85 | 3517 | .callback_ops = &nfs4_lock_ops, |
101070ca | 3518 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3519 | .flags = RPC_TASK_ASYNC, |
3520 | }; | |
a5d16a4d TM |
3521 | int ret; |
3522 | ||
3110ff80 | 3523 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 3524 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
3525 | fl->fl_u.nfs4_fl.owner); |
3526 | if (data == NULL) | |
3527 | return -ENOMEM; | |
3528 | if (IS_SETLKW(cmd)) | |
3529 | data->arg.block = 1; | |
3530 | if (reclaim != 0) | |
3531 | data->arg.reclaim = 1; | |
5138fde0 TM |
3532 | msg.rpc_argp = &data->arg, |
3533 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3534 | task_setup_data.callback_data = data; |
3535 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 3536 | if (IS_ERR(task)) |
a5d16a4d | 3537 | return PTR_ERR(task); |
a5d16a4d TM |
3538 | ret = nfs4_wait_for_completion_rpc_task(task); |
3539 | if (ret == 0) { | |
3540 | ret = data->rpc_status; | |
3541 | if (ret == -NFS4ERR_DENIED) | |
3542 | ret = -EAGAIN; | |
3543 | } else | |
3544 | data->cancelled = 1; | |
e6b3c4db | 3545 | rpc_put_task(task); |
3110ff80 | 3546 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 3547 | return ret; |
1da177e4 LT |
3548 | } |
3549 | ||
3550 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3551 | { | |
202b50dc TM |
3552 | struct nfs_server *server = NFS_SERVER(state->inode); |
3553 | struct nfs4_exception exception = { }; | |
3554 | int err; | |
3555 | ||
3556 | do { | |
42a2d13e TM |
3557 | /* Cache the lock if possible... */ |
3558 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3559 | return 0; | |
202b50dc TM |
3560 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3561 | if (err != -NFS4ERR_DELAY) | |
3562 | break; | |
3563 | nfs4_handle_exception(server, err, &exception); | |
3564 | } while (exception.retry); | |
3565 | return err; | |
1da177e4 LT |
3566 | } |
3567 | ||
3568 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3569 | { | |
202b50dc TM |
3570 | struct nfs_server *server = NFS_SERVER(state->inode); |
3571 | struct nfs4_exception exception = { }; | |
3572 | int err; | |
3573 | ||
6bfc93ef TM |
3574 | err = nfs4_set_lock_state(state, request); |
3575 | if (err != 0) | |
3576 | return err; | |
202b50dc | 3577 | do { |
42a2d13e TM |
3578 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3579 | return 0; | |
202b50dc TM |
3580 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3581 | if (err != -NFS4ERR_DELAY) | |
3582 | break; | |
3583 | nfs4_handle_exception(server, err, &exception); | |
3584 | } while (exception.retry); | |
3585 | return err; | |
1da177e4 LT |
3586 | } |
3587 | ||
3588 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3589 | { | |
19e03c57 | 3590 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 3591 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3592 | int status; |
3593 | ||
6bfc93ef | 3594 | /* Is this a delegated open? */ |
6bfc93ef TM |
3595 | status = nfs4_set_lock_state(state, request); |
3596 | if (status != 0) | |
3597 | goto out; | |
01c3b861 TM |
3598 | request->fl_flags |= FL_ACCESS; |
3599 | status = do_vfs_lock(request->fl_file, request); | |
3600 | if (status < 0) | |
3601 | goto out; | |
19e03c57 | 3602 | down_read(&nfsi->rwsem); |
01c3b861 | 3603 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 3604 | /* Yes: cache locks! */ |
01c3b861 | 3605 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
3606 | request->fl_flags = fl_flags & ~FL_SLEEP; |
3607 | status = do_vfs_lock(request->fl_file, request); | |
3608 | goto out_unlock; | |
01c3b861 | 3609 | } |
6bfc93ef TM |
3610 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3611 | if (status != 0) | |
01c3b861 | 3612 | goto out_unlock; |
6bfc93ef | 3613 | /* Note: we always want to sleep here! */ |
01c3b861 | 3614 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 3615 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 3616 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 3617 | out_unlock: |
19e03c57 | 3618 | up_read(&nfsi->rwsem); |
01c3b861 TM |
3619 | out: |
3620 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3621 | return status; |
3622 | } | |
3623 | ||
3624 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3625 | { | |
3626 | struct nfs4_exception exception = { }; | |
3627 | int err; | |
3628 | ||
3629 | do { | |
3630 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3631 | _nfs4_proc_setlk(state, cmd, request), | |
3632 | &exception); | |
3633 | } while (exception.retry); | |
3634 | return err; | |
3635 | } | |
3636 | ||
3637 | static int | |
3638 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3639 | { | |
3640 | struct nfs_open_context *ctx; | |
3641 | struct nfs4_state *state; | |
3642 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3643 | int status; | |
3644 | ||
3645 | /* verify open state */ | |
cd3758e3 | 3646 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
3647 | state = ctx->state; |
3648 | ||
3649 | if (request->fl_start < 0 || request->fl_end < 0) | |
3650 | return -EINVAL; | |
3651 | ||
3652 | if (IS_GETLK(cmd)) | |
3653 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3654 | ||
3655 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3656 | return -EINVAL; | |
3657 | ||
3658 | if (request->fl_type == F_UNLCK) | |
3659 | return nfs4_proc_unlck(state, cmd, request); | |
3660 | ||
3661 | do { | |
3662 | status = nfs4_proc_setlk(state, cmd, request); | |
3663 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3664 | break; | |
3665 | timeout = nfs4_set_lock_task_retry(timeout); | |
3666 | status = -ERESTARTSYS; | |
3667 | if (signalled()) | |
3668 | break; | |
3669 | } while(status < 0); | |
1da177e4 LT |
3670 | return status; |
3671 | } | |
3672 | ||
888e694c TM |
3673 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3674 | { | |
3675 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3676 | struct nfs4_exception exception = { }; | |
3677 | int err; | |
3678 | ||
3679 | err = nfs4_set_lock_state(state, fl); | |
3680 | if (err != 0) | |
3681 | goto out; | |
3682 | do { | |
3683 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3684 | if (err != -NFS4ERR_DELAY) | |
3685 | break; | |
3686 | err = nfs4_handle_exception(server, err, &exception); | |
3687 | } while (exception.retry); | |
3688 | out: | |
3689 | return err; | |
3690 | } | |
6b3b5496 | 3691 | |
aa1870af BF |
3692 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3693 | ||
6b3b5496 BF |
3694 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3695 | size_t buflen, int flags) | |
3696 | { | |
4b580ee3 BF |
3697 | struct inode *inode = dentry->d_inode; |
3698 | ||
3699 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3700 | return -EOPNOTSUPP; | |
3701 | ||
4b580ee3 | 3702 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
3703 | } |
3704 | ||
3705 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3706 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3707 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3708 | * attributes in kernel-managed attribute namespaces. */ | |
3709 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3710 | size_t buflen) | |
3711 | { | |
aa1870af BF |
3712 | struct inode *inode = dentry->d_inode; |
3713 | ||
3714 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3715 | return -EOPNOTSUPP; | |
3716 | ||
3717 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3718 | } |
3719 | ||
3720 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3721 | { | |
aa1870af | 3722 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 3723 | |
096455a2 BF |
3724 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
3725 | return 0; | |
6b3b5496 BF |
3726 | if (buf && buflen < len) |
3727 | return -ERANGE; | |
3728 | if (buf) | |
aa1870af BF |
3729 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3730 | return len; | |
6b3b5496 BF |
3731 | } |
3732 | ||
69aaaae1 TM |
3733 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
3734 | { | |
3735 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
3736 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
3737 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
3738 | return; | |
3739 | ||
3740 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
3741 | NFS_ATTR_FATTR_NLINK; | |
3742 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
3743 | fattr->nlink = 2; | |
3744 | } | |
3745 | ||
56659e99 | 3746 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 3747 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
3748 | { |
3749 | struct nfs_server *server = NFS_SERVER(dir); | |
3750 | u32 bitmask[2] = { | |
361e624f MN |
3751 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
3752 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
3753 | }; |
3754 | struct nfs4_fs_locations_arg args = { | |
3755 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 3756 | .name = name, |
683b57b4 TM |
3757 | .page = page, |
3758 | .bitmask = bitmask, | |
3759 | }; | |
22958463 BH |
3760 | struct nfs4_fs_locations_res res = { |
3761 | .fs_locations = fs_locations, | |
3762 | }; | |
683b57b4 TM |
3763 | struct rpc_message msg = { |
3764 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3765 | .rpc_argp = &args, | |
22958463 | 3766 | .rpc_resp = &res, |
683b57b4 TM |
3767 | }; |
3768 | int status; | |
3769 | ||
3110ff80 | 3770 | dprintk("%s: start\n", __func__); |
c228fd3a | 3771 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 3772 | fs_locations->server = server; |
830b8e33 | 3773 | fs_locations->nlocations = 0; |
cccef3b9 | 3774 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 3775 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 3776 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
3777 | return status; |
3778 | } | |
3779 | ||
557134a3 AA |
3780 | #ifdef CONFIG_NFS_V4_1 |
3781 | /* Destroy the slot table */ | |
3782 | static void nfs4_destroy_slot_table(struct nfs4_session *session) | |
3783 | { | |
3784 | if (session->fc_slot_table.slots == NULL) | |
3785 | return; | |
3786 | kfree(session->fc_slot_table.slots); | |
3787 | session->fc_slot_table.slots = NULL; | |
3788 | return; | |
3789 | } | |
3790 | ||
3791 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
3792 | { | |
3793 | struct nfs4_session *session; | |
3794 | struct nfs4_slot_table *tbl; | |
3795 | ||
3796 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
3797 | if (!session) | |
3798 | return NULL; | |
3799 | tbl = &session->fc_slot_table; | |
3800 | spin_lock_init(&tbl->slot_tbl_lock); | |
3801 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table"); | |
3802 | session->clp = clp; | |
3803 | return session; | |
3804 | } | |
3805 | ||
3806 | void nfs4_destroy_session(struct nfs4_session *session) | |
3807 | { | |
3808 | nfs4_destroy_slot_table(session); | |
3809 | kfree(session); | |
3810 | } | |
3811 | ||
3812 | #endif /* CONFIG_NFS_V4_1 */ | |
3813 | ||
1da177e4 | 3814 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
7eff03ae | 3815 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 3816 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
3817 | .recover_open = nfs4_open_reclaim, |
3818 | .recover_lock = nfs4_lock_reclaim, | |
3819 | }; | |
3820 | ||
b79a4a1b | 3821 | struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { |
7eff03ae | 3822 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 3823 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
3824 | .recover_open = nfs4_open_expired, |
3825 | .recover_lock = nfs4_lock_expired, | |
3826 | }; | |
3827 | ||
92e1d5be | 3828 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
3829 | .permission = nfs_permission, |
3830 | .getattr = nfs_getattr, | |
3831 | .setattr = nfs_setattr, | |
3832 | .getxattr = nfs4_getxattr, | |
3833 | .setxattr = nfs4_setxattr, | |
3834 | .listxattr = nfs4_listxattr, | |
3835 | }; | |
3836 | ||
509de811 | 3837 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
3838 | .version = 4, /* protocol version */ |
3839 | .dentry_ops = &nfs4_dentry_operations, | |
3840 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3841 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3842 | .getroot = nfs4_proc_get_root, |
3843 | .getattr = nfs4_proc_getattr, | |
3844 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 3845 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
3846 | .lookup = nfs4_proc_lookup, |
3847 | .access = nfs4_proc_access, | |
3848 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
3849 | .create = nfs4_proc_create, |
3850 | .remove = nfs4_proc_remove, | |
3851 | .unlink_setup = nfs4_proc_unlink_setup, | |
3852 | .unlink_done = nfs4_proc_unlink_done, | |
3853 | .rename = nfs4_proc_rename, | |
3854 | .link = nfs4_proc_link, | |
3855 | .symlink = nfs4_proc_symlink, | |
3856 | .mkdir = nfs4_proc_mkdir, | |
3857 | .rmdir = nfs4_proc_remove, | |
3858 | .readdir = nfs4_proc_readdir, | |
3859 | .mknod = nfs4_proc_mknod, | |
3860 | .statfs = nfs4_proc_statfs, | |
3861 | .fsinfo = nfs4_proc_fsinfo, | |
3862 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 3863 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
3864 | .decode_dirent = nfs4_decode_dirent, |
3865 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 3866 | .read_done = nfs4_read_done, |
1da177e4 | 3867 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 3868 | .write_done = nfs4_write_done, |
1da177e4 | 3869 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 3870 | .commit_done = nfs4_commit_done, |
1da177e4 | 3871 | .lock = nfs4_proc_lock, |
e50a1c2e | 3872 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 3873 | .close_context = nfs4_close_context, |
1da177e4 LT |
3874 | }; |
3875 | ||
3876 | /* | |
3877 | * Local variables: | |
3878 | * c-basic-offset: 8 | |
3879 | * End: | |
3880 | */ |