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" |
006ea73e | 54 | #include "iostat.h" |
1da177e4 LT |
55 | |
56 | #define NFSDBG_FACILITY NFSDBG_PROC | |
57 | ||
2066fe89 | 58 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
59 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
60 | ||
cdd4e68b | 61 | struct nfs4_opendata; |
864472e9 | 62 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 63 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
faf5f49c | 64 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); |
1da177e4 | 65 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
faf5f49c | 66 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
adfa6f98 | 67 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp); |
1da177e4 | 68 | |
1da177e4 LT |
69 | /* Prevent leaks of NFSv4 errors into userland */ |
70 | int nfs4_map_errors(int err) | |
71 | { | |
72 | if (err < -1000) { | |
73 | dprintk("%s could not handle NFSv4 error %d\n", | |
74 | __FUNCTION__, -err); | |
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 */ | |
177 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); | |
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 */ | |
189 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); | |
190 | ||
191 | readdir->pgbase = (char *)p - (char *)start; | |
192 | readdir->count -= readdir->pgbase; | |
193 | kunmap_atomic(start, KM_USER0); | |
194 | } | |
195 | ||
26e976a8 | 196 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 197 | { |
7539bbab | 198 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
199 | spin_lock(&clp->cl_lock); |
200 | if (time_before(clp->cl_last_renewal,timestamp)) | |
201 | clp->cl_last_renewal = timestamp; | |
202 | spin_unlock(&clp->cl_lock); | |
203 | } | |
204 | ||
38478b24 | 205 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 206 | { |
38478b24 | 207 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 208 | |
38478b24 TM |
209 | spin_lock(&dir->i_lock); |
210 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
1da177e4 LT |
211 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
212 | nfsi->change_attr = cinfo->after; | |
38478b24 | 213 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
214 | } |
215 | ||
e56e0b78 | 216 | struct nfs4_opendata { |
24ac23ab | 217 | atomic_t count; |
e56e0b78 TM |
218 | struct nfs_openargs o_arg; |
219 | struct nfs_openres o_res; | |
cdd4e68b TM |
220 | struct nfs_open_confirmargs c_arg; |
221 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
222 | struct nfs_fattr f_attr; |
223 | struct nfs_fattr dir_attr; | |
ad389da7 | 224 | struct path path; |
e56e0b78 TM |
225 | struct dentry *dir; |
226 | struct nfs4_state_owner *owner; | |
227 | struct iattr attrs; | |
26e976a8 | 228 | unsigned long timestamp; |
24ac23ab TM |
229 | int rpc_status; |
230 | int cancelled; | |
e56e0b78 TM |
231 | }; |
232 | ||
ad389da7 | 233 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
e56e0b78 TM |
234 | struct nfs4_state_owner *sp, int flags, |
235 | const struct iattr *attrs) | |
236 | { | |
ad389da7 | 237 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
238 | struct inode *dir = parent->d_inode; |
239 | struct nfs_server *server = NFS_SERVER(dir); | |
240 | struct nfs4_opendata *p; | |
241 | ||
242 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
243 | if (p == NULL) | |
244 | goto err; | |
245 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
246 | if (p->o_arg.seqid == NULL) | |
247 | goto err_free; | |
24ac23ab | 248 | atomic_set(&p->count, 1); |
ad389da7 TM |
249 | p->path.mnt = mntget(path->mnt); |
250 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
251 | p->dir = parent; |
252 | p->owner = sp; | |
253 | atomic_inc(&sp->so_count); | |
254 | p->o_arg.fh = NFS_FH(dir); | |
255 | p->o_arg.open_flags = flags, | |
7539bbab | 256 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
e56e0b78 | 257 | p->o_arg.id = sp->so_id; |
ad389da7 | 258 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
259 | p->o_arg.server = server; |
260 | p->o_arg.bitmask = server->attr_bitmask; | |
261 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
262 | p->o_res.f_attr = &p->f_attr; | |
263 | p->o_res.dir_attr = &p->dir_attr; | |
264 | p->o_res.server = server; | |
265 | nfs_fattr_init(&p->f_attr); | |
266 | nfs_fattr_init(&p->dir_attr); | |
267 | if (flags & O_EXCL) { | |
268 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
269 | s[0] = jiffies; | |
270 | s[1] = current->pid; | |
271 | } else if (flags & O_CREAT) { | |
272 | p->o_arg.u.attrs = &p->attrs; | |
273 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
274 | } | |
cdd4e68b TM |
275 | p->c_arg.fh = &p->o_res.fh; |
276 | p->c_arg.stateid = &p->o_res.stateid; | |
277 | p->c_arg.seqid = p->o_arg.seqid; | |
e56e0b78 TM |
278 | return p; |
279 | err_free: | |
280 | kfree(p); | |
281 | err: | |
282 | dput(parent); | |
283 | return NULL; | |
284 | } | |
285 | ||
286 | static void nfs4_opendata_free(struct nfs4_opendata *p) | |
287 | { | |
24ac23ab | 288 | if (p != NULL && atomic_dec_and_test(&p->count)) { |
e56e0b78 TM |
289 | nfs_free_seqid(p->o_arg.seqid); |
290 | nfs4_put_state_owner(p->owner); | |
291 | dput(p->dir); | |
ad389da7 TM |
292 | dput(p->path.dentry); |
293 | mntput(p->path.mnt); | |
e56e0b78 TM |
294 | kfree(p); |
295 | } | |
296 | } | |
297 | ||
06f814a3 TM |
298 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
299 | { | |
300 | sigset_t oldset; | |
301 | int ret; | |
302 | ||
303 | rpc_clnt_sigmask(task->tk_client, &oldset); | |
304 | ret = rpc_wait_for_completion_task(task); | |
305 | rpc_clnt_sigunmask(task->tk_client, &oldset); | |
306 | return ret; | |
307 | } | |
308 | ||
e7616923 TM |
309 | static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags) |
310 | { | |
311 | switch (open_flags) { | |
312 | case FMODE_WRITE: | |
313 | state->n_wronly++; | |
314 | break; | |
315 | case FMODE_READ: | |
316 | state->n_rdonly++; | |
317 | break; | |
318 | case FMODE_READ|FMODE_WRITE: | |
319 | state->n_rdwr++; | |
320 | } | |
321 | } | |
322 | ||
1da177e4 LT |
323 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
324 | { | |
325 | struct inode *inode = state->inode; | |
326 | ||
327 | open_flags &= (FMODE_READ|FMODE_WRITE); | |
d530838b | 328 | /* Protect against nfs4_find_state_byowner() */ |
ec073428 | 329 | spin_lock(&state->owner->so_lock); |
1da177e4 | 330 | spin_lock(&inode->i_lock); |
4cecb76f | 331 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
e7616923 | 332 | update_open_stateflags(state, open_flags); |
4cecb76f | 333 | nfs4_state_set_mode_locked(state, state->state | open_flags); |
1da177e4 | 334 | spin_unlock(&inode->i_lock); |
ec073428 | 335 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
336 | } |
337 | ||
24ac23ab TM |
338 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
339 | { | |
340 | struct inode *inode; | |
341 | struct nfs4_state *state = NULL; | |
342 | ||
343 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
344 | goto out; | |
345 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
03f28e3a | 346 | if (IS_ERR(inode)) |
24ac23ab TM |
347 | goto out; |
348 | state = nfs4_get_open_state(inode, data->owner); | |
349 | if (state == NULL) | |
350 | goto put_inode; | |
351 | update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags); | |
352 | put_inode: | |
353 | iput(inode); | |
354 | out: | |
355 | return state; | |
356 | } | |
357 | ||
864472e9 TM |
358 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
359 | { | |
360 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
361 | struct nfs_open_context *ctx; | |
362 | ||
363 | spin_lock(&state->inode->i_lock); | |
364 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
365 | if (ctx->state != state) | |
366 | continue; | |
367 | get_nfs_open_context(ctx); | |
368 | spin_unlock(&state->inode->i_lock); | |
369 | return ctx; | |
370 | } | |
371 | spin_unlock(&state->inode->i_lock); | |
372 | return ERR_PTR(-ENOENT); | |
373 | } | |
374 | ||
375 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid) | |
376 | { | |
377 | int ret; | |
378 | ||
379 | opendata->o_arg.open_flags = openflags; | |
380 | ret = _nfs4_proc_open(opendata); | |
381 | if (ret != 0) | |
382 | return ret; | |
383 | memcpy(stateid->data, opendata->o_res.stateid.data, | |
384 | sizeof(stateid->data)); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
389 | { | |
390 | nfs4_stateid stateid; | |
391 | struct nfs4_state *newstate; | |
392 | int mode = 0; | |
393 | int delegation = 0; | |
394 | int ret; | |
395 | ||
396 | /* memory barrier prior to reading state->n_* */ | |
397 | smp_rmb(); | |
398 | if (state->n_rdwr != 0) { | |
399 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid); | |
400 | if (ret != 0) | |
401 | return ret; | |
402 | mode |= FMODE_READ|FMODE_WRITE; | |
403 | if (opendata->o_res.delegation_type != 0) | |
404 | delegation = opendata->o_res.delegation_type; | |
405 | smp_rmb(); | |
406 | } | |
407 | if (state->n_wronly != 0) { | |
408 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid); | |
409 | if (ret != 0) | |
410 | return ret; | |
411 | mode |= FMODE_WRITE; | |
412 | if (opendata->o_res.delegation_type != 0) | |
413 | delegation = opendata->o_res.delegation_type; | |
414 | smp_rmb(); | |
415 | } | |
416 | if (state->n_rdonly != 0) { | |
417 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid); | |
418 | if (ret != 0) | |
419 | return ret; | |
420 | mode |= FMODE_READ; | |
421 | } | |
422 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
423 | if (mode == 0) | |
424 | return 0; | |
425 | if (opendata->o_res.delegation_type == 0) | |
426 | opendata->o_res.delegation_type = delegation; | |
427 | opendata->o_arg.open_flags |= mode; | |
428 | newstate = nfs4_opendata_to_nfs4_state(opendata); | |
429 | if (newstate != NULL) { | |
430 | if (opendata->o_res.delegation_type != 0) { | |
431 | struct nfs_inode *nfsi = NFS_I(newstate->inode); | |
432 | int delegation_flags = 0; | |
433 | if (nfsi->delegation) | |
434 | delegation_flags = nfsi->delegation->flags; | |
435 | if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM)) | |
436 | nfs_inode_set_delegation(newstate->inode, | |
437 | opendata->owner->so_cred, | |
438 | &opendata->o_res); | |
439 | else | |
440 | nfs_inode_reclaim_delegation(newstate->inode, | |
441 | opendata->owner->so_cred, | |
442 | &opendata->o_res); | |
443 | } | |
4a35bd41 | 444 | nfs4_close_state(&opendata->path, newstate, opendata->o_arg.open_flags); |
864472e9 TM |
445 | } |
446 | if (newstate != state) | |
447 | return -ESTALE; | |
448 | return 0; | |
449 | } | |
450 | ||
1da177e4 LT |
451 | /* |
452 | * OPEN_RECLAIM: | |
453 | * reclaim state on the server after a reboot. | |
1da177e4 | 454 | */ |
539cd03a | 455 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 456 | { |
864472e9 TM |
457 | struct nfs_delegation *delegation = NFS_I(state->inode)->delegation; |
458 | struct nfs4_opendata *opendata; | |
459 | int delegation_type = 0; | |
1da177e4 LT |
460 | int status; |
461 | ||
462 | if (delegation != NULL) { | |
463 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
464 | memcpy(&state->stateid, &delegation->stateid, | |
465 | sizeof(state->stateid)); | |
466 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
467 | return 0; | |
468 | } | |
864472e9 | 469 | delegation_type = delegation->type; |
1da177e4 | 470 | } |
ad389da7 | 471 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL); |
864472e9 | 472 | if (opendata == NULL) |
cee54fc9 | 473 | return -ENOMEM; |
864472e9 TM |
474 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
475 | opendata->o_arg.fh = NFS_FH(state->inode); | |
476 | nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh); | |
477 | opendata->o_arg.u.delegation_type = delegation_type; | |
478 | status = nfs4_open_recover(opendata, state); | |
479 | nfs4_opendata_free(opendata); | |
1da177e4 LT |
480 | return status; |
481 | } | |
482 | ||
539cd03a | 483 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
484 | { |
485 | struct nfs_server *server = NFS_SERVER(state->inode); | |
486 | struct nfs4_exception exception = { }; | |
487 | int err; | |
488 | do { | |
539cd03a | 489 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
490 | if (err != -NFS4ERR_DELAY) |
491 | break; | |
492 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
493 | } while (exception.retry); |
494 | return err; | |
495 | } | |
496 | ||
864472e9 TM |
497 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
498 | { | |
499 | struct nfs_open_context *ctx; | |
500 | int ret; | |
501 | ||
502 | ctx = nfs4_state_find_open_context(state); | |
503 | if (IS_ERR(ctx)) | |
504 | return PTR_ERR(ctx); | |
539cd03a | 505 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
506 | put_nfs_open_context(ctx); |
507 | return ret; | |
508 | } | |
509 | ||
539cd03a | 510 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
511 | { |
512 | struct nfs4_state_owner *sp = state->owner; | |
e56e0b78 | 513 | struct nfs4_opendata *opendata; |
864472e9 | 514 | int ret; |
1da177e4 | 515 | |
1da177e4 | 516 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
864472e9 | 517 | return 0; |
ad389da7 | 518 | opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL); |
e56e0b78 | 519 | if (opendata == NULL) |
864472e9 | 520 | return -ENOMEM; |
e56e0b78 | 521 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
e56e0b78 TM |
522 | memcpy(opendata->o_arg.u.delegation.data, state->stateid.data, |
523 | sizeof(opendata->o_arg.u.delegation.data)); | |
864472e9 | 524 | ret = nfs4_open_recover(opendata, state); |
e56e0b78 | 525 | nfs4_opendata_free(opendata); |
864472e9 | 526 | return ret; |
1da177e4 LT |
527 | } |
528 | ||
539cd03a | 529 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
530 | { |
531 | struct nfs4_exception exception = { }; | |
539cd03a | 532 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
533 | int err; |
534 | do { | |
539cd03a | 535 | err = _nfs4_open_delegation_recall(ctx, state); |
1da177e4 LT |
536 | switch (err) { |
537 | case 0: | |
538 | return err; | |
539 | case -NFS4ERR_STALE_CLIENTID: | |
540 | case -NFS4ERR_STALE_STATEID: | |
541 | case -NFS4ERR_EXPIRED: | |
542 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 543 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
544 | return err; |
545 | } | |
546 | err = nfs4_handle_exception(server, err, &exception); | |
547 | } while (exception.retry); | |
548 | return err; | |
549 | } | |
550 | ||
cdd4e68b | 551 | static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 552 | { |
cdd4e68b TM |
553 | struct nfs4_opendata *data = calldata; |
554 | struct rpc_message msg = { | |
555 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
556 | .rpc_argp = &data->c_arg, | |
557 | .rpc_resp = &data->c_res, | |
558 | .rpc_cred = data->owner->so_cred, | |
1da177e4 | 559 | }; |
26e976a8 | 560 | data->timestamp = jiffies; |
cdd4e68b TM |
561 | rpc_call_setup(task, &msg, 0); |
562 | } | |
563 | ||
564 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
565 | { | |
566 | struct nfs4_opendata *data = calldata; | |
567 | ||
568 | data->rpc_status = task->tk_status; | |
569 | if (RPC_ASSASSINATED(task)) | |
570 | return; | |
26e976a8 | 571 | if (data->rpc_status == 0) { |
cdd4e68b TM |
572 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
573 | sizeof(data->o_res.stateid.data)); | |
26e976a8 TM |
574 | renew_lease(data->o_res.server, data->timestamp); |
575 | } | |
cdd4e68b TM |
576 | nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); |
577 | nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); | |
578 | } | |
579 | ||
580 | static void nfs4_open_confirm_release(void *calldata) | |
581 | { | |
582 | struct nfs4_opendata *data = calldata; | |
583 | struct nfs4_state *state = NULL; | |
584 | ||
585 | /* If this request hasn't been cancelled, do nothing */ | |
586 | if (data->cancelled == 0) | |
587 | goto out_free; | |
588 | /* In case of error, no cleanup! */ | |
589 | if (data->rpc_status != 0) | |
590 | goto out_free; | |
591 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
592 | state = nfs4_opendata_to_nfs4_state(data); | |
593 | if (state != NULL) | |
4a35bd41 | 594 | nfs4_close_state(&data->path, state, data->o_arg.open_flags); |
cdd4e68b TM |
595 | out_free: |
596 | nfs4_opendata_free(data); | |
597 | } | |
598 | ||
599 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
600 | .rpc_call_prepare = nfs4_open_confirm_prepare, | |
601 | .rpc_call_done = nfs4_open_confirm_done, | |
602 | .rpc_release = nfs4_open_confirm_release, | |
603 | }; | |
604 | ||
605 | /* | |
606 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
607 | */ | |
608 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
609 | { | |
610 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
611 | struct rpc_task *task; | |
1da177e4 LT |
612 | int status; |
613 | ||
cdd4e68b | 614 | atomic_inc(&data->count); |
7a1218a2 TM |
615 | /* |
616 | * If rpc_run_task() ends up calling ->rpc_release(), we | |
617 | * want to ensure that it takes the 'error' code path. | |
618 | */ | |
619 | data->rpc_status = -ENOMEM; | |
cdd4e68b | 620 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); |
7a1218a2 | 621 | if (IS_ERR(task)) |
cdd4e68b | 622 | return PTR_ERR(task); |
cdd4e68b TM |
623 | status = nfs4_wait_for_completion_rpc_task(task); |
624 | if (status != 0) { | |
625 | data->cancelled = 1; | |
626 | smp_wmb(); | |
627 | } else | |
628 | status = data->rpc_status; | |
e6b3c4db | 629 | rpc_put_task(task); |
1da177e4 LT |
630 | return status; |
631 | } | |
632 | ||
24ac23ab | 633 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 634 | { |
24ac23ab TM |
635 | struct nfs4_opendata *data = calldata; |
636 | struct nfs4_state_owner *sp = data->owner; | |
1da177e4 LT |
637 | struct rpc_message msg = { |
638 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
24ac23ab TM |
639 | .rpc_argp = &data->o_arg, |
640 | .rpc_resp = &data->o_res, | |
1da177e4 LT |
641 | .rpc_cred = sp->so_cred, |
642 | }; | |
24ac23ab TM |
643 | |
644 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
645 | return; | |
646 | /* Update sequence id. */ | |
647 | data->o_arg.id = sp->so_id; | |
648 | data->o_arg.clientid = sp->so_client->cl_clientid; | |
864472e9 TM |
649 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
650 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
26e976a8 | 651 | data->timestamp = jiffies; |
24ac23ab TM |
652 | rpc_call_setup(task, &msg, 0); |
653 | } | |
1da177e4 | 654 | |
24ac23ab TM |
655 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
656 | { | |
657 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 658 | |
24ac23ab TM |
659 | data->rpc_status = task->tk_status; |
660 | if (RPC_ASSASSINATED(task)) | |
661 | return; | |
662 | if (task->tk_status == 0) { | |
663 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
664 | case S_IFREG: |
665 | break; | |
666 | case S_IFLNK: | |
24ac23ab | 667 | data->rpc_status = -ELOOP; |
6f926b5b TM |
668 | break; |
669 | case S_IFDIR: | |
24ac23ab | 670 | data->rpc_status = -EISDIR; |
6f926b5b TM |
671 | break; |
672 | default: | |
24ac23ab | 673 | data->rpc_status = -ENOTDIR; |
6f926b5b | 674 | } |
26e976a8 | 675 | renew_lease(data->o_res.server, data->timestamp); |
6f926b5b | 676 | } |
24ac23ab TM |
677 | nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); |
678 | } | |
6f926b5b | 679 | |
24ac23ab TM |
680 | static void nfs4_open_release(void *calldata) |
681 | { | |
682 | struct nfs4_opendata *data = calldata; | |
683 | struct nfs4_state *state = NULL; | |
684 | ||
685 | /* If this request hasn't been cancelled, do nothing */ | |
686 | if (data->cancelled == 0) | |
687 | goto out_free; | |
688 | /* In case of error, no cleanup! */ | |
689 | if (data->rpc_status != 0) | |
690 | goto out_free; | |
691 | /* In case we need an open_confirm, no cleanup! */ | |
692 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
693 | goto out_free; | |
694 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
695 | state = nfs4_opendata_to_nfs4_state(data); | |
696 | if (state != NULL) | |
4a35bd41 | 697 | nfs4_close_state(&data->path, state, data->o_arg.open_flags); |
24ac23ab TM |
698 | out_free: |
699 | nfs4_opendata_free(data); | |
700 | } | |
701 | ||
702 | static const struct rpc_call_ops nfs4_open_ops = { | |
703 | .rpc_call_prepare = nfs4_open_prepare, | |
704 | .rpc_call_done = nfs4_open_done, | |
705 | .rpc_release = nfs4_open_release, | |
706 | }; | |
707 | ||
708 | /* | |
709 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
710 | */ | |
711 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
712 | { | |
713 | struct inode *dir = data->dir->d_inode; | |
714 | struct nfs_server *server = NFS_SERVER(dir); | |
715 | struct nfs_openargs *o_arg = &data->o_arg; | |
716 | struct nfs_openres *o_res = &data->o_res; | |
717 | struct rpc_task *task; | |
718 | int status; | |
719 | ||
720 | atomic_inc(&data->count); | |
7a1218a2 TM |
721 | /* |
722 | * If rpc_run_task() ends up calling ->rpc_release(), we | |
723 | * want to ensure that it takes the 'error' code path. | |
724 | */ | |
725 | data->rpc_status = -ENOMEM; | |
24ac23ab | 726 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); |
7a1218a2 | 727 | if (IS_ERR(task)) |
24ac23ab | 728 | return PTR_ERR(task); |
24ac23ab TM |
729 | status = nfs4_wait_for_completion_rpc_task(task); |
730 | if (status != 0) { | |
731 | data->cancelled = 1; | |
732 | smp_wmb(); | |
733 | } else | |
734 | status = data->rpc_status; | |
e6b3c4db | 735 | rpc_put_task(task); |
1da177e4 | 736 | if (status != 0) |
24ac23ab TM |
737 | return status; |
738 | ||
56ae19f3 TM |
739 | if (o_arg->open_flags & O_CREAT) { |
740 | update_changeattr(dir, &o_res->cinfo); | |
741 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
742 | } else | |
743 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 744 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 745 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 746 | if (status != 0) |
24ac23ab | 747 | return status; |
1da177e4 | 748 | } |
24ac23ab | 749 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
1da177e4 | 750 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
8fa5c000 | 751 | return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 752 | return 0; |
1da177e4 LT |
753 | } |
754 | ||
755 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
756 | { | |
757 | struct nfs_access_entry cache; | |
758 | int mask = 0; | |
759 | int status; | |
760 | ||
761 | if (openflags & FMODE_READ) | |
762 | mask |= MAY_READ; | |
763 | if (openflags & FMODE_WRITE) | |
764 | mask |= MAY_WRITE; | |
765 | status = nfs_access_get_cached(inode, cred, &cache); | |
766 | if (status == 0) | |
767 | goto out; | |
768 | ||
769 | /* Be clever: ask server to check for all possible rights */ | |
770 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
771 | cache.cred = cred; | |
772 | cache.jiffies = jiffies; | |
773 | status = _nfs4_proc_access(inode, &cache); | |
774 | if (status != 0) | |
775 | return status; | |
776 | nfs_access_add_cache(inode, &cache); | |
777 | out: | |
778 | if ((cache.mask & mask) == mask) | |
779 | return 0; | |
780 | return -EACCES; | |
781 | } | |
782 | ||
10afec90 | 783 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 784 | { |
7539bbab | 785 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 786 | int ret; |
58d9714a | 787 | |
6b30954e TM |
788 | for (;;) { |
789 | ret = nfs4_wait_clnt_recover(server->client, clp); | |
790 | if (ret != 0) | |
791 | return ret; | |
792 | if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
793 | break; | |
58d9714a | 794 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
795 | } |
796 | return 0; | |
58d9714a TM |
797 | } |
798 | ||
1da177e4 LT |
799 | /* |
800 | * OPEN_EXPIRED: | |
801 | * reclaim state on the server after a network partition. | |
802 | * Assumes caller holds the appropriate lock | |
803 | */ | |
539cd03a | 804 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 805 | { |
1da177e4 | 806 | struct inode *inode = state->inode; |
1da177e4 | 807 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
e56e0b78 | 808 | struct nfs4_opendata *opendata; |
24ac23ab | 809 | int openflags = state->state & (FMODE_READ|FMODE_WRITE); |
864472e9 | 810 | int ret; |
1da177e4 LT |
811 | |
812 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
539cd03a | 813 | ret = _nfs4_do_access(inode, ctx->cred, openflags); |
864472e9 TM |
814 | if (ret < 0) |
815 | return ret; | |
1da177e4 LT |
816 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
817 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
864472e9 | 818 | return 0; |
1da177e4 | 819 | } |
ad389da7 | 820 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL); |
e56e0b78 | 821 | if (opendata == NULL) |
864472e9 TM |
822 | return -ENOMEM; |
823 | ret = nfs4_open_recover(opendata, state); | |
824 | if (ret == -ESTALE) { | |
825 | /* Invalidate the state owner so we don't ever use it again */ | |
539cd03a TM |
826 | nfs4_drop_state_owner(state->owner); |
827 | d_drop(ctx->path.dentry); | |
1da177e4 | 828 | } |
e56e0b78 | 829 | nfs4_opendata_free(opendata); |
864472e9 | 830 | return ret; |
1da177e4 LT |
831 | } |
832 | ||
539cd03a | 833 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 834 | { |
539cd03a | 835 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
836 | struct nfs4_exception exception = { }; |
837 | int err; | |
838 | ||
839 | do { | |
539cd03a | 840 | err = _nfs4_open_expired(ctx, state); |
202b50dc TM |
841 | if (err == -NFS4ERR_DELAY) |
842 | nfs4_handle_exception(server, err, &exception); | |
843 | } while (exception.retry); | |
844 | return err; | |
845 | } | |
846 | ||
1da177e4 LT |
847 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
848 | { | |
1da177e4 | 849 | struct nfs_open_context *ctx; |
864472e9 | 850 | int ret; |
1da177e4 | 851 | |
864472e9 TM |
852 | ctx = nfs4_state_find_open_context(state); |
853 | if (IS_ERR(ctx)) | |
854 | return PTR_ERR(ctx); | |
539cd03a | 855 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
856 | put_nfs_open_context(ctx); |
857 | return ret; | |
1da177e4 LT |
858 | } |
859 | ||
860 | /* | |
24ac23ab | 861 | * Returns a referenced nfs4_state if there is an open delegation on the file |
1da177e4 LT |
862 | */ |
863 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
864 | { | |
865 | struct nfs_delegation *delegation; | |
866 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 867 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
868 | struct nfs_inode *nfsi = NFS_I(inode); |
869 | struct nfs4_state_owner *sp = NULL; | |
870 | struct nfs4_state *state = NULL; | |
871 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
872 | int err; | |
873 | ||
b4454fe1 TM |
874 | err = -ENOMEM; |
875 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
876 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
877 | return err; | |
878 | } | |
58d9714a TM |
879 | err = nfs4_recover_expired_lease(server); |
880 | if (err != 0) | |
b4454fe1 | 881 | goto out_put_state_owner; |
1da177e4 LT |
882 | /* Protect against reboot recovery - NOTE ORDER! */ |
883 | down_read(&clp->cl_sem); | |
884 | /* Protect against delegation recall */ | |
885 | down_read(&nfsi->rwsem); | |
886 | delegation = NFS_I(inode)->delegation; | |
887 | err = -ENOENT; | |
888 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
889 | goto out_err; | |
890 | err = -ENOMEM; | |
1da177e4 LT |
891 | state = nfs4_get_open_state(inode, sp); |
892 | if (state == NULL) | |
893 | goto out_err; | |
894 | ||
895 | err = -ENOENT; | |
896 | if ((state->state & open_flags) == open_flags) { | |
897 | spin_lock(&inode->i_lock); | |
e7616923 | 898 | update_open_stateflags(state, open_flags); |
1da177e4 LT |
899 | spin_unlock(&inode->i_lock); |
900 | goto out_ok; | |
901 | } else if (state->state != 0) | |
b4454fe1 | 902 | goto out_put_open_state; |
1da177e4 LT |
903 | |
904 | lock_kernel(); | |
905 | err = _nfs4_do_access(inode, cred, open_flags); | |
906 | unlock_kernel(); | |
907 | if (err != 0) | |
b4454fe1 | 908 | goto out_put_open_state; |
1da177e4 LT |
909 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
910 | update_open_stateid(state, &delegation->stateid, open_flags); | |
911 | out_ok: | |
1da177e4 LT |
912 | nfs4_put_state_owner(sp); |
913 | up_read(&nfsi->rwsem); | |
914 | up_read(&clp->cl_sem); | |
1da177e4 | 915 | *res = state; |
b4454fe1 TM |
916 | return 0; |
917 | out_put_open_state: | |
918 | nfs4_put_open_state(state); | |
1da177e4 | 919 | out_err: |
1da177e4 LT |
920 | up_read(&nfsi->rwsem); |
921 | up_read(&clp->cl_sem); | |
b8e5c4c2 TM |
922 | if (err != -EACCES) |
923 | nfs_inode_return_delegation(inode); | |
b4454fe1 TM |
924 | out_put_state_owner: |
925 | nfs4_put_state_owner(sp); | |
1da177e4 LT |
926 | return err; |
927 | } | |
928 | ||
929 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
930 | { | |
931 | struct nfs4_exception exception = { }; | |
a162a6b8 | 932 | struct nfs4_state *res = ERR_PTR(-EIO); |
1da177e4 LT |
933 | int err; |
934 | ||
935 | do { | |
936 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
937 | if (err == 0) | |
938 | break; | |
939 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
940 | err, &exception)); | |
941 | } while (exception.retry); | |
942 | return res; | |
943 | } | |
944 | ||
945 | /* | |
24ac23ab | 946 | * Returns a referenced nfs4_state |
1da177e4 | 947 | */ |
ad389da7 | 948 | static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
1da177e4 LT |
949 | { |
950 | struct nfs4_state_owner *sp; | |
951 | struct nfs4_state *state = NULL; | |
952 | struct nfs_server *server = NFS_SERVER(dir); | |
7539bbab | 953 | struct nfs_client *clp = server->nfs_client; |
e56e0b78 | 954 | struct nfs4_opendata *opendata; |
1da177e4 | 955 | int status; |
1da177e4 LT |
956 | |
957 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
958 | status = -ENOMEM; |
959 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
960 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
961 | goto out_err; | |
962 | } | |
58d9714a TM |
963 | status = nfs4_recover_expired_lease(server); |
964 | if (status != 0) | |
b4454fe1 | 965 | goto err_put_state_owner; |
58d9714a TM |
966 | down_read(&clp->cl_sem); |
967 | status = -ENOMEM; | |
ad389da7 | 968 | opendata = nfs4_opendata_alloc(path, sp, flags, sattr); |
e56e0b78 | 969 | if (opendata == NULL) |
76723de0 | 970 | goto err_release_rwsem; |
1da177e4 | 971 | |
24ac23ab | 972 | status = _nfs4_proc_open(opendata); |
1da177e4 | 973 | if (status != 0) |
e56e0b78 | 974 | goto err_opendata_free; |
1da177e4 LT |
975 | |
976 | status = -ENOMEM; | |
24ac23ab TM |
977 | state = nfs4_opendata_to_nfs4_state(opendata); |
978 | if (state == NULL) | |
e56e0b78 | 979 | goto err_opendata_free; |
e56e0b78 | 980 | if (opendata->o_res.delegation_type != 0) |
24ac23ab | 981 | nfs_inode_set_delegation(state->inode, cred, &opendata->o_res); |
e56e0b78 | 982 | nfs4_opendata_free(opendata); |
1da177e4 LT |
983 | nfs4_put_state_owner(sp); |
984 | up_read(&clp->cl_sem); | |
985 | *res = state; | |
986 | return 0; | |
e56e0b78 TM |
987 | err_opendata_free: |
988 | nfs4_opendata_free(opendata); | |
76723de0 TM |
989 | err_release_rwsem: |
990 | up_read(&clp->cl_sem); | |
e56e0b78 TM |
991 | err_put_state_owner: |
992 | nfs4_put_state_owner(sp); | |
1da177e4 | 993 | out_err: |
1da177e4 LT |
994 | *res = NULL; |
995 | return status; | |
996 | } | |
997 | ||
998 | ||
ad389da7 | 999 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred) |
1da177e4 LT |
1000 | { |
1001 | struct nfs4_exception exception = { }; | |
1002 | struct nfs4_state *res; | |
1003 | int status; | |
1004 | ||
1005 | do { | |
ad389da7 | 1006 | status = _nfs4_do_open(dir, path, flags, sattr, cred, &res); |
1da177e4 LT |
1007 | if (status == 0) |
1008 | break; | |
1009 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1010 | * book-keeping w.r.t. state-changing operations | |
1011 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1012 | * It is actually a sign of a bug on the client or on the server. | |
1013 | * | |
1014 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1015 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1016 | * have unhashed the old state_owner for us, and that we can |
1017 | * therefore safely retry using a new one. We should still warn | |
1018 | * the user though... | |
1019 | */ | |
1020 | if (status == -NFS4ERR_BAD_SEQID) { | |
1021 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
1022 | exception.retry = 1; | |
1023 | continue; | |
1024 | } | |
550f5747 TM |
1025 | /* |
1026 | * BAD_STATEID on OPEN means that the server cancelled our | |
1027 | * state before it received the OPEN_CONFIRM. | |
1028 | * Recover by retrying the request as per the discussion | |
1029 | * on Page 181 of RFC3530. | |
1030 | */ | |
1031 | if (status == -NFS4ERR_BAD_STATEID) { | |
1032 | exception.retry = 1; | |
1033 | continue; | |
1034 | } | |
1da177e4 LT |
1035 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1036 | status, &exception)); | |
1037 | } while (exception.retry); | |
1038 | return res; | |
1039 | } | |
1040 | ||
3e4f6290 TM |
1041 | static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, |
1042 | struct iattr *sattr, struct nfs4_state *state) | |
1da177e4 | 1043 | { |
3e4f6290 | 1044 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1045 | struct nfs_setattrargs arg = { |
3e4f6290 | 1046 | .fh = NFS_FH(inode), |
1da177e4 LT |
1047 | .iap = sattr, |
1048 | .server = server, | |
1049 | .bitmask = server->attr_bitmask, | |
1050 | }; | |
1051 | struct nfs_setattrres res = { | |
1052 | .fattr = fattr, | |
1053 | .server = server, | |
1054 | }; | |
1055 | struct rpc_message msg = { | |
1056 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1057 | .rpc_argp = &arg, | |
1058 | .rpc_resp = &res, | |
1059 | }; | |
26e976a8 | 1060 | unsigned long timestamp = jiffies; |
65e4308d | 1061 | int status; |
1da177e4 | 1062 | |
0e574af1 | 1063 | nfs_fattr_init(fattr); |
1da177e4 | 1064 | |
3e4f6290 TM |
1065 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1066 | /* Use that stateid */ | |
1067 | } else if (state != NULL) { | |
1da177e4 | 1068 | msg.rpc_cred = state->owner->so_cred; |
08e9eac4 TM |
1069 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1070 | } else | |
1da177e4 LT |
1071 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1072 | ||
65e4308d | 1073 | status = rpc_call_sync(server->client, &msg, 0); |
26e976a8 TM |
1074 | if (status == 0 && state != NULL) |
1075 | renew_lease(server, timestamp); | |
65e4308d | 1076 | return status; |
1da177e4 LT |
1077 | } |
1078 | ||
3e4f6290 TM |
1079 | static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, |
1080 | struct iattr *sattr, struct nfs4_state *state) | |
1da177e4 | 1081 | { |
3e4f6290 | 1082 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1083 | struct nfs4_exception exception = { }; |
1084 | int err; | |
1085 | do { | |
1086 | err = nfs4_handle_exception(server, | |
3e4f6290 | 1087 | _nfs4_do_setattr(inode, fattr, sattr, state), |
1da177e4 LT |
1088 | &exception); |
1089 | } while (exception.retry); | |
1090 | return err; | |
1091 | } | |
1092 | ||
1093 | struct nfs4_closedata { | |
4a35bd41 | 1094 | struct path path; |
1da177e4 LT |
1095 | struct inode *inode; |
1096 | struct nfs4_state *state; | |
1097 | struct nfs_closeargs arg; | |
1098 | struct nfs_closeres res; | |
516a6af6 | 1099 | struct nfs_fattr fattr; |
26e976a8 | 1100 | unsigned long timestamp; |
1da177e4 LT |
1101 | }; |
1102 | ||
963d8fe5 | 1103 | static void nfs4_free_closedata(void *data) |
9512135d | 1104 | { |
963d8fe5 TM |
1105 | struct nfs4_closedata *calldata = data; |
1106 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1107 | |
1108 | nfs4_put_open_state(calldata->state); | |
1109 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1110 | nfs4_put_state_owner(sp); |
4a35bd41 TM |
1111 | dput(calldata->path.dentry); |
1112 | mntput(calldata->path.mnt); | |
9512135d TM |
1113 | kfree(calldata); |
1114 | } | |
1115 | ||
963d8fe5 | 1116 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1117 | { |
963d8fe5 | 1118 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1119 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1120 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1121 | ||
4ce70ada TM |
1122 | if (RPC_ASSASSINATED(task)) |
1123 | return; | |
1da177e4 LT |
1124 | /* hmm. we are done with the inode, and in the process of freeing |
1125 | * the state_owner. we keep this around to process errors | |
1126 | */ | |
cee54fc9 | 1127 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
1da177e4 LT |
1128 | switch (task->tk_status) { |
1129 | case 0: | |
1130 | memcpy(&state->stateid, &calldata->res.stateid, | |
1131 | sizeof(state->stateid)); | |
26e976a8 | 1132 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1133 | break; |
1134 | case -NFS4ERR_STALE_STATEID: | |
1135 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
1136 | break; |
1137 | default: | |
1138 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
1139 | rpc_restart_call(task); | |
1140 | return; | |
1141 | } | |
1142 | } | |
516a6af6 | 1143 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1144 | } |
1145 | ||
4ce70ada | 1146 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1147 | { |
4ce70ada | 1148 | struct nfs4_closedata *calldata = data; |
9512135d | 1149 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1150 | struct rpc_message msg = { |
1151 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1152 | .rpc_argp = &calldata->arg, | |
1153 | .rpc_resp = &calldata->res, | |
9512135d | 1154 | .rpc_cred = state->owner->so_cred, |
1da177e4 | 1155 | }; |
4cecb76f | 1156 | int mode = 0, old_mode; |
9512135d | 1157 | |
963d8fe5 | 1158 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1159 | return; |
9512135d TM |
1160 | /* Recalculate the new open mode in case someone reopened the file |
1161 | * while we were waiting in line to be scheduled. | |
1162 | */ | |
4cecb76f TM |
1163 | spin_lock(&state->owner->so_lock); |
1164 | spin_lock(&calldata->inode->i_lock); | |
1165 | mode = old_mode = state->state; | |
e7616923 TM |
1166 | if (state->n_rdwr == 0) { |
1167 | if (state->n_rdonly == 0) | |
1168 | mode &= ~FMODE_READ; | |
1169 | if (state->n_wronly == 0) | |
1170 | mode &= ~FMODE_WRITE; | |
1171 | } | |
4cecb76f TM |
1172 | nfs4_state_set_mode_locked(state, mode); |
1173 | spin_unlock(&calldata->inode->i_lock); | |
1174 | spin_unlock(&state->owner->so_lock); | |
1175 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
963d8fe5 TM |
1176 | /* Note: exit _without_ calling nfs4_close_done */ |
1177 | task->tk_action = NULL; | |
9512135d TM |
1178 | return; |
1179 | } | |
516a6af6 | 1180 | nfs_fattr_init(calldata->res.fattr); |
9512135d | 1181 | if (mode != 0) |
1da177e4 | 1182 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
9512135d | 1183 | calldata->arg.open_flags = mode; |
26e976a8 | 1184 | calldata->timestamp = jiffies; |
9512135d | 1185 | rpc_call_setup(task, &msg, 0); |
1da177e4 LT |
1186 | } |
1187 | ||
963d8fe5 | 1188 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1189 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1190 | .rpc_call_done = nfs4_close_done, |
1191 | .rpc_release = nfs4_free_closedata, | |
1192 | }; | |
1193 | ||
1da177e4 LT |
1194 | /* |
1195 | * It is possible for data to be read/written from a mem-mapped file | |
1196 | * after the sys_close call (which hits the vfs layer as a flush). | |
1197 | * This means that we can't safely call nfsv4 close on a file until | |
1198 | * the inode is cleared. This in turn means that we are not good | |
1199 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1200 | * share state even when we are done with one of the three share | |
1201 | * stateid's in the inode. | |
1202 | * | |
1203 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1204 | */ | |
4a35bd41 | 1205 | int nfs4_do_close(struct path *path, struct nfs4_state *state) |
1da177e4 | 1206 | { |
4a35bd41 | 1207 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1208 | struct nfs4_closedata *calldata; |
b39e625b TM |
1209 | struct nfs4_state_owner *sp = state->owner; |
1210 | struct rpc_task *task; | |
9512135d | 1211 | int status = -ENOMEM; |
1da177e4 | 1212 | |
9512135d | 1213 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1214 | if (calldata == NULL) |
9512135d | 1215 | goto out; |
4a35bd41 | 1216 | calldata->inode = state->inode; |
1da177e4 | 1217 | calldata->state = state; |
4a35bd41 | 1218 | calldata->arg.fh = NFS_FH(state->inode); |
9512135d | 1219 | calldata->arg.stateid = &state->stateid; |
1da177e4 | 1220 | /* Serialization for the sequence id */ |
cee54fc9 | 1221 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1222 | if (calldata->arg.seqid == NULL) |
1223 | goto out_free_calldata; | |
516a6af6 TM |
1224 | calldata->arg.bitmask = server->attr_bitmask; |
1225 | calldata->res.fattr = &calldata->fattr; | |
1226 | calldata->res.server = server; | |
4a35bd41 TM |
1227 | calldata->path.mnt = mntget(path->mnt); |
1228 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1229 | |
b39e625b TM |
1230 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata); |
1231 | if (IS_ERR(task)) | |
1232 | return PTR_ERR(task); | |
1233 | rpc_put_task(task); | |
1234 | return 0; | |
9512135d TM |
1235 | out_free_calldata: |
1236 | kfree(calldata); | |
1237 | out: | |
b39e625b TM |
1238 | nfs4_put_open_state(state); |
1239 | nfs4_put_state_owner(sp); | |
9512135d | 1240 | return status; |
1da177e4 LT |
1241 | } |
1242 | ||
4a35bd41 | 1243 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state) |
02a913a7 TM |
1244 | { |
1245 | struct file *filp; | |
1246 | ||
4a35bd41 | 1247 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1248 | if (!IS_ERR(filp)) { |
1249 | struct nfs_open_context *ctx; | |
1250 | ctx = (struct nfs_open_context *)filp->private_data; | |
1251 | ctx->state = state; | |
95cf959b TM |
1252 | return 0; |
1253 | } | |
4a35bd41 | 1254 | nfs4_close_state(path, state, nd->intent.open.flags); |
95cf959b | 1255 | return PTR_ERR(filp); |
02a913a7 TM |
1256 | } |
1257 | ||
1258 | struct dentry * | |
1da177e4 LT |
1259 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1260 | { | |
ad389da7 TM |
1261 | struct path path = { |
1262 | .mnt = nd->mnt, | |
1263 | .dentry = dentry, | |
1264 | }; | |
1da177e4 LT |
1265 | struct iattr attr; |
1266 | struct rpc_cred *cred; | |
1267 | struct nfs4_state *state; | |
02a913a7 | 1268 | struct dentry *res; |
1da177e4 LT |
1269 | |
1270 | if (nd->flags & LOOKUP_CREATE) { | |
1271 | attr.ia_mode = nd->intent.open.create_mode; | |
1272 | attr.ia_valid = ATTR_MODE; | |
1273 | if (!IS_POSIXACL(dir)) | |
1274 | attr.ia_mode &= ~current->fs->umask; | |
1275 | } else { | |
1276 | attr.ia_valid = 0; | |
1277 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1278 | } | |
1279 | ||
1f163415 | 1280 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
1da177e4 | 1281 | if (IS_ERR(cred)) |
02a913a7 | 1282 | return (struct dentry *)cred; |
ad389da7 | 1283 | state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1284 | put_rpccred(cred); |
02a913a7 TM |
1285 | if (IS_ERR(state)) { |
1286 | if (PTR_ERR(state) == -ENOENT) | |
1287 | d_add(dentry, NULL); | |
1288 | return (struct dentry *)state; | |
1289 | } | |
24ac23ab | 1290 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 TM |
1291 | if (res != NULL) |
1292 | dentry = res; | |
4a35bd41 | 1293 | nfs4_intent_set_file(nd, &path, state); |
02a913a7 | 1294 | return res; |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | int | |
02a913a7 | 1298 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1299 | { |
ad389da7 TM |
1300 | struct path path = { |
1301 | .mnt = nd->mnt, | |
1302 | .dentry = dentry, | |
1303 | }; | |
1da177e4 LT |
1304 | struct rpc_cred *cred; |
1305 | struct nfs4_state *state; | |
1da177e4 | 1306 | |
1f163415 | 1307 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
1da177e4 LT |
1308 | if (IS_ERR(cred)) |
1309 | return PTR_ERR(cred); | |
1310 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
1311 | if (IS_ERR(state)) | |
ad389da7 | 1312 | state = nfs4_do_open(dir, &path, openflags, NULL, cred); |
1da177e4 | 1313 | put_rpccred(cred); |
02a913a7 TM |
1314 | if (IS_ERR(state)) { |
1315 | switch (PTR_ERR(state)) { | |
1316 | case -EPERM: | |
1317 | case -EACCES: | |
1318 | case -EDQUOT: | |
1319 | case -ENOSPC: | |
1320 | case -EROFS: | |
1321 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1322 | return 1; | |
b87c0adf CL |
1323 | default: |
1324 | goto out_drop; | |
02a913a7 | 1325 | } |
02a913a7 | 1326 | } |
24ac23ab | 1327 | if (state->inode == dentry->d_inode) { |
4a35bd41 | 1328 | nfs4_intent_set_file(nd, &path, state); |
1da177e4 LT |
1329 | return 1; |
1330 | } | |
4a35bd41 | 1331 | nfs4_close_state(&path, state, openflags); |
02a913a7 TM |
1332 | out_drop: |
1333 | d_drop(dentry); | |
1da177e4 LT |
1334 | return 0; |
1335 | } | |
1336 | ||
1337 | ||
1338 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1339 | { | |
1340 | struct nfs4_server_caps_res res = {}; | |
1341 | struct rpc_message msg = { | |
1342 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1343 | .rpc_argp = fhandle, | |
1344 | .rpc_resp = &res, | |
1345 | }; | |
1346 | int status; | |
1347 | ||
1348 | status = rpc_call_sync(server->client, &msg, 0); | |
1349 | if (status == 0) { | |
1350 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1351 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1352 | server->caps |= NFS_CAP_ACLS; | |
1353 | if (res.has_links != 0) | |
1354 | server->caps |= NFS_CAP_HARDLINKS; | |
1355 | if (res.has_symlinks != 0) | |
1356 | server->caps |= NFS_CAP_SYMLINKS; | |
1357 | server->acl_bitmask = res.acl_bitmask; | |
1358 | } | |
1359 | return status; | |
1360 | } | |
1361 | ||
55a97593 | 1362 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1363 | { |
1364 | struct nfs4_exception exception = { }; | |
1365 | int err; | |
1366 | do { | |
1367 | err = nfs4_handle_exception(server, | |
1368 | _nfs4_server_capabilities(server, fhandle), | |
1369 | &exception); | |
1370 | } while (exception.retry); | |
1371 | return err; | |
1372 | } | |
1373 | ||
1374 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1375 | struct nfs_fsinfo *info) | |
1376 | { | |
1da177e4 LT |
1377 | struct nfs4_lookup_root_arg args = { |
1378 | .bitmask = nfs4_fattr_bitmap, | |
1379 | }; | |
1380 | struct nfs4_lookup_res res = { | |
1381 | .server = server, | |
0e574af1 | 1382 | .fattr = info->fattr, |
1da177e4 LT |
1383 | .fh = fhandle, |
1384 | }; | |
1385 | struct rpc_message msg = { | |
1386 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1387 | .rpc_argp = &args, | |
1388 | .rpc_resp = &res, | |
1389 | }; | |
0e574af1 | 1390 | nfs_fattr_init(info->fattr); |
1da177e4 LT |
1391 | return rpc_call_sync(server->client, &msg, 0); |
1392 | } | |
1393 | ||
1394 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1395 | struct nfs_fsinfo *info) | |
1396 | { | |
1397 | struct nfs4_exception exception = { }; | |
1398 | int err; | |
1399 | do { | |
1400 | err = nfs4_handle_exception(server, | |
1401 | _nfs4_lookup_root(server, fhandle, info), | |
1402 | &exception); | |
1403 | } while (exception.retry); | |
1404 | return err; | |
1405 | } | |
1406 | ||
54ceac45 DH |
1407 | /* |
1408 | * get the file handle for the "/" directory on the server | |
1409 | */ | |
1da177e4 | 1410 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1411 | struct nfs_fsinfo *info) |
1da177e4 | 1412 | { |
1da177e4 LT |
1413 | int status; |
1414 | ||
1da177e4 | 1415 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
1416 | if (status == 0) |
1417 | status = nfs4_server_capabilities(server, fhandle); | |
1418 | if (status == 0) | |
1419 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 1420 | return nfs4_map_errors(status); |
1da177e4 LT |
1421 | } |
1422 | ||
6b97fd3d MN |
1423 | /* |
1424 | * Get locations and (maybe) other attributes of a referral. | |
1425 | * Note that we'll actually follow the referral later when | |
1426 | * we detect fsid mismatch in inode revalidation | |
1427 | */ | |
1428 | static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) | |
1429 | { | |
1430 | int status = -ENOMEM; | |
1431 | struct page *page = NULL; | |
1432 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
1433 | |
1434 | page = alloc_page(GFP_KERNEL); | |
1435 | if (page == NULL) | |
1436 | goto out; | |
1437 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1438 | if (locations == NULL) | |
1439 | goto out; | |
1440 | ||
c228fd3a | 1441 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
1442 | if (status != 0) |
1443 | goto out; | |
1444 | /* Make sure server returned a different fsid for the referral */ | |
1445 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
1446 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name); | |
1447 | status = -EIO; | |
1448 | goto out; | |
1449 | } | |
1450 | ||
1451 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1452 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1453 | if (!fattr->mode) | |
1454 | fattr->mode = S_IFDIR; | |
1455 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1456 | out: | |
1457 | if (page) | |
1458 | __free_page(page); | |
1459 | if (locations) | |
1460 | kfree(locations); | |
1461 | return status; | |
1462 | } | |
1463 | ||
1da177e4 LT |
1464 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1465 | { | |
1466 | struct nfs4_getattr_arg args = { | |
1467 | .fh = fhandle, | |
1468 | .bitmask = server->attr_bitmask, | |
1469 | }; | |
1470 | struct nfs4_getattr_res res = { | |
1471 | .fattr = fattr, | |
1472 | .server = server, | |
1473 | }; | |
1474 | struct rpc_message msg = { | |
1475 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1476 | .rpc_argp = &args, | |
1477 | .rpc_resp = &res, | |
1478 | }; | |
1479 | ||
0e574af1 | 1480 | nfs_fattr_init(fattr); |
1da177e4 LT |
1481 | return rpc_call_sync(server->client, &msg, 0); |
1482 | } | |
1483 | ||
1484 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1485 | { | |
1486 | struct nfs4_exception exception = { }; | |
1487 | int err; | |
1488 | do { | |
1489 | err = nfs4_handle_exception(server, | |
1490 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1491 | &exception); | |
1492 | } while (exception.retry); | |
1493 | return err; | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * The file is not closed if it is opened due to the a request to change | |
1498 | * the size of the file. The open call will not be needed once the | |
1499 | * VFS layer lookup-intents are implemented. | |
1500 | * | |
1501 | * Close is called when the inode is destroyed. | |
1502 | * If we haven't opened the file for O_WRONLY, we | |
1503 | * need to in the size_change case to obtain a stateid. | |
1504 | * | |
1505 | * Got race? | |
1506 | * Because OPEN is always done by name in nfsv4, it is | |
1507 | * possible that we opened a different file by the same | |
1508 | * name. We can recognize this race condition, but we | |
1509 | * can't do anything about it besides returning an error. | |
1510 | * | |
1511 | * This will be fixed with VFS changes (lookup-intent). | |
1512 | */ | |
1513 | static int | |
1514 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1515 | struct iattr *sattr) | |
1516 | { | |
08e9eac4 TM |
1517 | struct rpc_cred *cred; |
1518 | struct inode *inode = dentry->d_inode; | |
d530838b TM |
1519 | struct nfs_open_context *ctx; |
1520 | struct nfs4_state *state = NULL; | |
1da177e4 LT |
1521 | int status; |
1522 | ||
0e574af1 | 1523 | nfs_fattr_init(fattr); |
1da177e4 | 1524 | |
1f163415 | 1525 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
08e9eac4 TM |
1526 | if (IS_ERR(cred)) |
1527 | return PTR_ERR(cred); | |
d530838b TM |
1528 | |
1529 | /* Search for an existing open(O_WRITE) file */ | |
1530 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); | |
1531 | if (ctx != NULL) | |
1532 | state = ctx->state; | |
08e9eac4 | 1533 | |
3e4f6290 | 1534 | status = nfs4_do_setattr(inode, fattr, sattr, state); |
65e4308d TM |
1535 | if (status == 0) |
1536 | nfs_setattr_update_inode(inode, sattr); | |
d530838b TM |
1537 | if (ctx != NULL) |
1538 | put_nfs_open_context(ctx); | |
08e9eac4 | 1539 | put_rpccred(cred); |
1da177e4 LT |
1540 | return status; |
1541 | } | |
1542 | ||
2b3de441 DH |
1543 | static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, |
1544 | struct qstr *name, struct nfs_fh *fhandle, | |
1545 | struct nfs_fattr *fattr) | |
1546 | { | |
1547 | int status; | |
1548 | struct nfs4_lookup_arg args = { | |
1549 | .bitmask = server->attr_bitmask, | |
1550 | .dir_fh = dirfh, | |
1551 | .name = name, | |
1552 | }; | |
1553 | struct nfs4_lookup_res res = { | |
1554 | .server = server, | |
1555 | .fattr = fattr, | |
1556 | .fh = fhandle, | |
1557 | }; | |
1558 | struct rpc_message msg = { | |
1559 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1560 | .rpc_argp = &args, | |
1561 | .rpc_resp = &res, | |
1562 | }; | |
1563 | ||
1564 | nfs_fattr_init(fattr); | |
1565 | ||
1566 | dprintk("NFS call lookupfh %s\n", name->name); | |
1567 | status = rpc_call_sync(server->client, &msg, 0); | |
1568 | dprintk("NFS reply lookupfh: %d\n", status); | |
1569 | if (status == -NFS4ERR_MOVED) | |
1570 | status = -EREMOTE; | |
1571 | return status; | |
1572 | } | |
1573 | ||
1574 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
1575 | struct qstr *name, struct nfs_fh *fhandle, | |
1576 | struct nfs_fattr *fattr) | |
1577 | { | |
1578 | struct nfs4_exception exception = { }; | |
1579 | int err; | |
1580 | do { | |
1581 | err = nfs4_handle_exception(server, | |
1582 | _nfs4_proc_lookupfh(server, dirfh, name, | |
1583 | fhandle, fattr), | |
1584 | &exception); | |
1585 | } while (exception.retry); | |
1586 | return err; | |
1587 | } | |
1588 | ||
1da177e4 LT |
1589 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
1590 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1591 | { | |
1592 | int status; | |
1593 | struct nfs_server *server = NFS_SERVER(dir); | |
1594 | struct nfs4_lookup_arg args = { | |
1595 | .bitmask = server->attr_bitmask, | |
1596 | .dir_fh = NFS_FH(dir), | |
1597 | .name = name, | |
1598 | }; | |
1599 | struct nfs4_lookup_res res = { | |
1600 | .server = server, | |
1601 | .fattr = fattr, | |
1602 | .fh = fhandle, | |
1603 | }; | |
1604 | struct rpc_message msg = { | |
1605 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1606 | .rpc_argp = &args, | |
1607 | .rpc_resp = &res, | |
1608 | }; | |
1609 | ||
0e574af1 | 1610 | nfs_fattr_init(fattr); |
1da177e4 LT |
1611 | |
1612 | dprintk("NFS call lookup %s\n", name->name); | |
1613 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
6b97fd3d MN |
1614 | if (status == -NFS4ERR_MOVED) |
1615 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
1616 | dprintk("NFS reply lookup: %d\n", status); |
1617 | return status; | |
1618 | } | |
1619 | ||
1620 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1621 | { | |
1622 | struct nfs4_exception exception = { }; | |
1623 | int err; | |
1624 | do { | |
1625 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1626 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1627 | &exception); | |
1628 | } while (exception.retry); | |
1629 | return err; | |
1630 | } | |
1631 | ||
1632 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1633 | { | |
1634 | struct nfs4_accessargs args = { | |
1635 | .fh = NFS_FH(inode), | |
1636 | }; | |
1637 | struct nfs4_accessres res = { 0 }; | |
1638 | struct rpc_message msg = { | |
1639 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1640 | .rpc_argp = &args, | |
1641 | .rpc_resp = &res, | |
1642 | .rpc_cred = entry->cred, | |
1643 | }; | |
1644 | int mode = entry->mask; | |
1645 | int status; | |
1646 | ||
1647 | /* | |
1648 | * Determine which access bits we want to ask for... | |
1649 | */ | |
1650 | if (mode & MAY_READ) | |
1651 | args.access |= NFS4_ACCESS_READ; | |
1652 | if (S_ISDIR(inode->i_mode)) { | |
1653 | if (mode & MAY_WRITE) | |
1654 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1655 | if (mode & MAY_EXEC) | |
1656 | args.access |= NFS4_ACCESS_LOOKUP; | |
1657 | } else { | |
1658 | if (mode & MAY_WRITE) | |
1659 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1660 | if (mode & MAY_EXEC) | |
1661 | args.access |= NFS4_ACCESS_EXECUTE; | |
1662 | } | |
1663 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1664 | if (!status) { | |
1665 | entry->mask = 0; | |
1666 | if (res.access & NFS4_ACCESS_READ) | |
1667 | entry->mask |= MAY_READ; | |
1668 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1669 | entry->mask |= MAY_WRITE; | |
1670 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1671 | entry->mask |= MAY_EXEC; | |
1672 | } | |
1673 | return status; | |
1674 | } | |
1675 | ||
1676 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1677 | { | |
1678 | struct nfs4_exception exception = { }; | |
1679 | int err; | |
1680 | do { | |
1681 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1682 | _nfs4_proc_access(inode, entry), | |
1683 | &exception); | |
1684 | } while (exception.retry); | |
1685 | return err; | |
1686 | } | |
1687 | ||
1688 | /* | |
1689 | * TODO: For the time being, we don't try to get any attributes | |
1690 | * along with any of the zero-copy operations READ, READDIR, | |
1691 | * READLINK, WRITE. | |
1692 | * | |
1693 | * In the case of the first three, we want to put the GETATTR | |
1694 | * after the read-type operation -- this is because it is hard | |
1695 | * to predict the length of a GETATTR response in v4, and thus | |
1696 | * align the READ data correctly. This means that the GETATTR | |
1697 | * may end up partially falling into the page cache, and we should | |
1698 | * shift it into the 'tail' of the xdr_buf before processing. | |
1699 | * To do this efficiently, we need to know the total length | |
1700 | * of data received, which doesn't seem to be available outside | |
1701 | * of the RPC layer. | |
1702 | * | |
1703 | * In the case of WRITE, we also want to put the GETATTR after | |
1704 | * the operation -- in this case because we want to make sure | |
1705 | * we get the post-operation mtime and size. This means that | |
1706 | * we can't use xdr_encode_pages() as written: we need a variant | |
1707 | * of it which would leave room in the 'tail' iovec. | |
1708 | * | |
1709 | * Both of these changes to the XDR layer would in fact be quite | |
1710 | * minor, but I decided to leave them for a subsequent patch. | |
1711 | */ | |
1712 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1713 | unsigned int pgbase, unsigned int pglen) | |
1714 | { | |
1715 | struct nfs4_readlink args = { | |
1716 | .fh = NFS_FH(inode), | |
1717 | .pgbase = pgbase, | |
1718 | .pglen = pglen, | |
1719 | .pages = &page, | |
1720 | }; | |
1721 | struct rpc_message msg = { | |
1722 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1723 | .rpc_argp = &args, | |
1724 | .rpc_resp = NULL, | |
1725 | }; | |
1726 | ||
1727 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1728 | } | |
1729 | ||
1730 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1731 | unsigned int pgbase, unsigned int pglen) | |
1732 | { | |
1733 | struct nfs4_exception exception = { }; | |
1734 | int err; | |
1735 | do { | |
1736 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1737 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1738 | &exception); | |
1739 | } while (exception.retry); | |
1740 | return err; | |
1741 | } | |
1742 | ||
1da177e4 LT |
1743 | /* |
1744 | * Got race? | |
1745 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1746 | * Until then, this create/open method is prone to inefficiency and race | |
1747 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1748 | * placed on the wire. | |
1749 | * | |
1750 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1751 | * The file will be opened again in the subsequent VFS open call | |
1752 | * (nfs4_proc_file_open). | |
1753 | * | |
1754 | * The open for read will just hang around to be used by any process that | |
1755 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1756 | */ | |
1757 | ||
1758 | static int | |
1759 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 1760 | int flags, struct nameidata *nd) |
1da177e4 | 1761 | { |
ad389da7 TM |
1762 | struct path path = { |
1763 | .mnt = nd->mnt, | |
1764 | .dentry = dentry, | |
1765 | }; | |
1da177e4 LT |
1766 | struct nfs4_state *state; |
1767 | struct rpc_cred *cred; | |
1768 | int status = 0; | |
1769 | ||
1f163415 | 1770 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
1da177e4 LT |
1771 | if (IS_ERR(cred)) { |
1772 | status = PTR_ERR(cred); | |
1773 | goto out; | |
1774 | } | |
ad389da7 | 1775 | state = nfs4_do_open(dir, &path, flags, sattr, cred); |
1da177e4 LT |
1776 | put_rpccred(cred); |
1777 | if (IS_ERR(state)) { | |
1778 | status = PTR_ERR(state); | |
1779 | goto out; | |
1780 | } | |
24ac23ab | 1781 | d_instantiate(dentry, igrab(state->inode)); |
1da177e4 LT |
1782 | if (flags & O_EXCL) { |
1783 | struct nfs_fattr fattr; | |
3e4f6290 | 1784 | status = nfs4_do_setattr(state->inode, &fattr, sattr, state); |
02a913a7 | 1785 | if (status == 0) |
65e4308d | 1786 | nfs_setattr_update_inode(state->inode, sattr); |
02a913a7 | 1787 | } |
ad389da7 | 1788 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
4a35bd41 | 1789 | status = nfs4_intent_set_file(nd, &path, state); |
02a913a7 | 1790 | else |
4a35bd41 | 1791 | nfs4_close_state(&path, state, flags); |
1da177e4 LT |
1792 | out: |
1793 | return status; | |
1794 | } | |
1795 | ||
1796 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1797 | { | |
16e42959 | 1798 | struct nfs_server *server = NFS_SERVER(dir); |
1da177e4 LT |
1799 | struct nfs4_remove_arg args = { |
1800 | .fh = NFS_FH(dir), | |
1801 | .name = name, | |
16e42959 TM |
1802 | .bitmask = server->attr_bitmask, |
1803 | }; | |
1804 | struct nfs_fattr dir_attr; | |
1805 | struct nfs4_remove_res res = { | |
1806 | .server = server, | |
1807 | .dir_attr = &dir_attr, | |
1da177e4 | 1808 | }; |
1da177e4 LT |
1809 | struct rpc_message msg = { |
1810 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1811 | .rpc_argp = &args, | |
1812 | .rpc_resp = &res, | |
1813 | }; | |
1814 | int status; | |
1815 | ||
16e42959 TM |
1816 | nfs_fattr_init(res.dir_attr); |
1817 | status = rpc_call_sync(server->client, &msg, 0); | |
1818 | if (status == 0) { | |
1819 | update_changeattr(dir, &res.cinfo); | |
1820 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1821 | } | |
1da177e4 LT |
1822 | return status; |
1823 | } | |
1824 | ||
1825 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1826 | { | |
1827 | struct nfs4_exception exception = { }; | |
1828 | int err; | |
1829 | do { | |
1830 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1831 | _nfs4_proc_remove(dir, name), | |
1832 | &exception); | |
1833 | } while (exception.retry); | |
1834 | return err; | |
1835 | } | |
1836 | ||
1837 | struct unlink_desc { | |
1838 | struct nfs4_remove_arg args; | |
16e42959 TM |
1839 | struct nfs4_remove_res res; |
1840 | struct nfs_fattr dir_attr; | |
1da177e4 LT |
1841 | }; |
1842 | ||
1843 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1844 | struct qstr *name) | |
1845 | { | |
16e42959 | 1846 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
1da177e4 LT |
1847 | struct unlink_desc *up; |
1848 | ||
5cbded58 | 1849 | up = kmalloc(sizeof(*up), GFP_KERNEL); |
1da177e4 LT |
1850 | if (!up) |
1851 | return -ENOMEM; | |
1852 | ||
1853 | up->args.fh = NFS_FH(dir->d_inode); | |
1854 | up->args.name = name; | |
16e42959 TM |
1855 | up->args.bitmask = server->attr_bitmask; |
1856 | up->res.server = server; | |
1857 | up->res.dir_attr = &up->dir_attr; | |
1da177e4 LT |
1858 | |
1859 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1860 | msg->rpc_argp = &up->args; | |
1861 | msg->rpc_resp = &up->res; | |
1862 | return 0; | |
1863 | } | |
1864 | ||
1865 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1866 | { | |
1867 | struct rpc_message *msg = &task->tk_msg; | |
1868 | struct unlink_desc *up; | |
1869 | ||
1870 | if (msg->rpc_resp != NULL) { | |
1871 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
16e42959 TM |
1872 | update_changeattr(dir->d_inode, &up->res.cinfo); |
1873 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); | |
1da177e4 LT |
1874 | kfree(up); |
1875 | msg->rpc_resp = NULL; | |
1876 | msg->rpc_argp = NULL; | |
1877 | } | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1882 | struct inode *new_dir, struct qstr *new_name) | |
1883 | { | |
6caf2c82 | 1884 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
1885 | struct nfs4_rename_arg arg = { |
1886 | .old_dir = NFS_FH(old_dir), | |
1887 | .new_dir = NFS_FH(new_dir), | |
1888 | .old_name = old_name, | |
1889 | .new_name = new_name, | |
6caf2c82 TM |
1890 | .bitmask = server->attr_bitmask, |
1891 | }; | |
1892 | struct nfs_fattr old_fattr, new_fattr; | |
1893 | struct nfs4_rename_res res = { | |
1894 | .server = server, | |
1895 | .old_fattr = &old_fattr, | |
1896 | .new_fattr = &new_fattr, | |
1da177e4 | 1897 | }; |
1da177e4 LT |
1898 | struct rpc_message msg = { |
1899 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
1900 | .rpc_argp = &arg, | |
1901 | .rpc_resp = &res, | |
1902 | }; | |
1903 | int status; | |
1904 | ||
6caf2c82 TM |
1905 | nfs_fattr_init(res.old_fattr); |
1906 | nfs_fattr_init(res.new_fattr); | |
1907 | status = rpc_call_sync(server->client, &msg, 0); | |
1da177e4 LT |
1908 | |
1909 | if (!status) { | |
1910 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 1911 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 1912 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 1913 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
1914 | } |
1915 | return status; | |
1916 | } | |
1917 | ||
1918 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1919 | struct inode *new_dir, struct qstr *new_name) | |
1920 | { | |
1921 | struct nfs4_exception exception = { }; | |
1922 | int err; | |
1923 | do { | |
1924 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
1925 | _nfs4_proc_rename(old_dir, old_name, | |
1926 | new_dir, new_name), | |
1927 | &exception); | |
1928 | } while (exception.retry); | |
1929 | return err; | |
1930 | } | |
1931 | ||
1932 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1933 | { | |
91ba2eee | 1934 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1935 | struct nfs4_link_arg arg = { |
1936 | .fh = NFS_FH(inode), | |
1937 | .dir_fh = NFS_FH(dir), | |
1938 | .name = name, | |
91ba2eee TM |
1939 | .bitmask = server->attr_bitmask, |
1940 | }; | |
1941 | struct nfs_fattr fattr, dir_attr; | |
1942 | struct nfs4_link_res res = { | |
1943 | .server = server, | |
1944 | .fattr = &fattr, | |
1945 | .dir_attr = &dir_attr, | |
1da177e4 | 1946 | }; |
1da177e4 LT |
1947 | struct rpc_message msg = { |
1948 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
1949 | .rpc_argp = &arg, | |
91ba2eee | 1950 | .rpc_resp = &res, |
1da177e4 LT |
1951 | }; |
1952 | int status; | |
1953 | ||
91ba2eee TM |
1954 | nfs_fattr_init(res.fattr); |
1955 | nfs_fattr_init(res.dir_attr); | |
1956 | status = rpc_call_sync(server->client, &msg, 0); | |
1957 | if (!status) { | |
1958 | update_changeattr(dir, &res.cinfo); | |
1959 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 1960 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 1961 | } |
1da177e4 LT |
1962 | |
1963 | return status; | |
1964 | } | |
1965 | ||
1966 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1967 | { | |
1968 | struct nfs4_exception exception = { }; | |
1969 | int err; | |
1970 | do { | |
1971 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1972 | _nfs4_proc_link(inode, dir, name), | |
1973 | &exception); | |
1974 | } while (exception.retry); | |
1975 | return err; | |
1976 | } | |
1977 | ||
4f390c15 | 1978 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 1979 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
1980 | { |
1981 | struct nfs_server *server = NFS_SERVER(dir); | |
4f390c15 CL |
1982 | struct nfs_fh fhandle; |
1983 | struct nfs_fattr fattr, dir_fattr; | |
1da177e4 LT |
1984 | struct nfs4_create_arg arg = { |
1985 | .dir_fh = NFS_FH(dir), | |
1986 | .server = server, | |
4f390c15 | 1987 | .name = &dentry->d_name, |
1da177e4 LT |
1988 | .attrs = sattr, |
1989 | .ftype = NF4LNK, | |
1990 | .bitmask = server->attr_bitmask, | |
1991 | }; | |
1992 | struct nfs4_create_res res = { | |
1993 | .server = server, | |
4f390c15 CL |
1994 | .fh = &fhandle, |
1995 | .fattr = &fattr, | |
56ae19f3 | 1996 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
1997 | }; |
1998 | struct rpc_message msg = { | |
1999 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
2000 | .rpc_argp = &arg, | |
2001 | .rpc_resp = &res, | |
2002 | }; | |
2003 | int status; | |
2004 | ||
94a6d753 | 2005 | if (len > NFS4_MAXPATHLEN) |
1da177e4 | 2006 | return -ENAMETOOLONG; |
4f390c15 | 2007 | |
94a6d753 CL |
2008 | arg.u.symlink.pages = &page; |
2009 | arg.u.symlink.len = len; | |
4f390c15 | 2010 | nfs_fattr_init(&fattr); |
56ae19f3 | 2011 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2012 | |
2013 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
4f390c15 | 2014 | if (!status) { |
1da177e4 | 2015 | update_changeattr(dir, &res.dir_cinfo); |
4f390c15 CL |
2016 | nfs_post_op_update_inode(dir, res.dir_fattr); |
2017 | status = nfs_instantiate(dentry, &fhandle, &fattr); | |
2018 | } | |
1da177e4 LT |
2019 | return status; |
2020 | } | |
2021 | ||
4f390c15 | 2022 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2023 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2024 | { |
2025 | struct nfs4_exception exception = { }; | |
2026 | int err; | |
2027 | do { | |
2028 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2029 | _nfs4_proc_symlink(dir, dentry, page, |
2030 | len, sattr), | |
1da177e4 LT |
2031 | &exception); |
2032 | } while (exception.retry); | |
2033 | return err; | |
2034 | } | |
2035 | ||
2036 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2037 | struct iattr *sattr) | |
2038 | { | |
2039 | struct nfs_server *server = NFS_SERVER(dir); | |
2040 | struct nfs_fh fhandle; | |
56ae19f3 | 2041 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2042 | struct nfs4_create_arg arg = { |
2043 | .dir_fh = NFS_FH(dir), | |
2044 | .server = server, | |
2045 | .name = &dentry->d_name, | |
2046 | .attrs = sattr, | |
2047 | .ftype = NF4DIR, | |
2048 | .bitmask = server->attr_bitmask, | |
2049 | }; | |
2050 | struct nfs4_create_res res = { | |
2051 | .server = server, | |
2052 | .fh = &fhandle, | |
2053 | .fattr = &fattr, | |
56ae19f3 | 2054 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2055 | }; |
2056 | struct rpc_message msg = { | |
2057 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2058 | .rpc_argp = &arg, | |
2059 | .rpc_resp = &res, | |
2060 | }; | |
2061 | int status; | |
2062 | ||
0e574af1 | 2063 | nfs_fattr_init(&fattr); |
56ae19f3 | 2064 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2065 | |
2066 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2067 | if (!status) { | |
2068 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2069 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2070 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
2071 | } | |
2072 | return status; | |
2073 | } | |
2074 | ||
2075 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2076 | struct iattr *sattr) | |
2077 | { | |
2078 | struct nfs4_exception exception = { }; | |
2079 | int err; | |
2080 | do { | |
2081 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2082 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2083 | &exception); | |
2084 | } while (exception.retry); | |
2085 | return err; | |
2086 | } | |
2087 | ||
2088 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2089 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2090 | { | |
2091 | struct inode *dir = dentry->d_inode; | |
2092 | struct nfs4_readdir_arg args = { | |
2093 | .fh = NFS_FH(dir), | |
2094 | .pages = &page, | |
2095 | .pgbase = 0, | |
2096 | .count = count, | |
2097 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
2098 | }; | |
2099 | struct nfs4_readdir_res res; | |
2100 | struct rpc_message msg = { | |
2101 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2102 | .rpc_argp = &args, | |
2103 | .rpc_resp = &res, | |
2104 | .rpc_cred = cred, | |
2105 | }; | |
2106 | int status; | |
2107 | ||
eadf4598 TM |
2108 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
2109 | dentry->d_parent->d_name.name, | |
2110 | dentry->d_name.name, | |
2111 | (unsigned long long)cookie); | |
1da177e4 LT |
2112 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2113 | res.pgbase = args.pgbase; | |
2114 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2115 | if (status == 0) | |
2116 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
eadf4598 | 2117 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
1da177e4 LT |
2118 | return status; |
2119 | } | |
2120 | ||
2121 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2122 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2123 | { | |
2124 | struct nfs4_exception exception = { }; | |
2125 | int err; | |
2126 | do { | |
2127 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2128 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2129 | page, count, plus), | |
2130 | &exception); | |
2131 | } while (exception.retry); | |
2132 | return err; | |
2133 | } | |
2134 | ||
2135 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2136 | struct iattr *sattr, dev_t rdev) | |
2137 | { | |
2138 | struct nfs_server *server = NFS_SERVER(dir); | |
2139 | struct nfs_fh fh; | |
56ae19f3 | 2140 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2141 | struct nfs4_create_arg arg = { |
2142 | .dir_fh = NFS_FH(dir), | |
2143 | .server = server, | |
2144 | .name = &dentry->d_name, | |
2145 | .attrs = sattr, | |
2146 | .bitmask = server->attr_bitmask, | |
2147 | }; | |
2148 | struct nfs4_create_res res = { | |
2149 | .server = server, | |
2150 | .fh = &fh, | |
2151 | .fattr = &fattr, | |
56ae19f3 | 2152 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2153 | }; |
2154 | struct rpc_message msg = { | |
2155 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2156 | .rpc_argp = &arg, | |
2157 | .rpc_resp = &res, | |
2158 | }; | |
2159 | int status; | |
2160 | int mode = sattr->ia_mode; | |
2161 | ||
0e574af1 | 2162 | nfs_fattr_init(&fattr); |
56ae19f3 | 2163 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2164 | |
2165 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2166 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2167 | if (S_ISFIFO(mode)) | |
2168 | arg.ftype = NF4FIFO; | |
2169 | else if (S_ISBLK(mode)) { | |
2170 | arg.ftype = NF4BLK; | |
2171 | arg.u.device.specdata1 = MAJOR(rdev); | |
2172 | arg.u.device.specdata2 = MINOR(rdev); | |
2173 | } | |
2174 | else if (S_ISCHR(mode)) { | |
2175 | arg.ftype = NF4CHR; | |
2176 | arg.u.device.specdata1 = MAJOR(rdev); | |
2177 | arg.u.device.specdata2 = MINOR(rdev); | |
2178 | } | |
2179 | else | |
2180 | arg.ftype = NF4SOCK; | |
2181 | ||
2182 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2183 | if (status == 0) { | |
2184 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2185 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2186 | status = nfs_instantiate(dentry, &fh, &fattr); |
2187 | } | |
2188 | return status; | |
2189 | } | |
2190 | ||
2191 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2192 | struct iattr *sattr, dev_t rdev) | |
2193 | { | |
2194 | struct nfs4_exception exception = { }; | |
2195 | int err; | |
2196 | do { | |
2197 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2198 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2199 | &exception); | |
2200 | } while (exception.retry); | |
2201 | return err; | |
2202 | } | |
2203 | ||
2204 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2205 | struct nfs_fsstat *fsstat) | |
2206 | { | |
2207 | struct nfs4_statfs_arg args = { | |
2208 | .fh = fhandle, | |
2209 | .bitmask = server->attr_bitmask, | |
2210 | }; | |
2211 | struct rpc_message msg = { | |
2212 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2213 | .rpc_argp = &args, | |
2214 | .rpc_resp = fsstat, | |
2215 | }; | |
2216 | ||
0e574af1 | 2217 | nfs_fattr_init(fsstat->fattr); |
1da177e4 LT |
2218 | return rpc_call_sync(server->client, &msg, 0); |
2219 | } | |
2220 | ||
2221 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2222 | { | |
2223 | struct nfs4_exception exception = { }; | |
2224 | int err; | |
2225 | do { | |
2226 | err = nfs4_handle_exception(server, | |
2227 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2228 | &exception); | |
2229 | } while (exception.retry); | |
2230 | return err; | |
2231 | } | |
2232 | ||
2233 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2234 | struct nfs_fsinfo *fsinfo) | |
2235 | { | |
2236 | struct nfs4_fsinfo_arg args = { | |
2237 | .fh = fhandle, | |
2238 | .bitmask = server->attr_bitmask, | |
2239 | }; | |
2240 | struct rpc_message msg = { | |
2241 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2242 | .rpc_argp = &args, | |
2243 | .rpc_resp = fsinfo, | |
2244 | }; | |
2245 | ||
2246 | return rpc_call_sync(server->client, &msg, 0); | |
2247 | } | |
2248 | ||
2249 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2250 | { | |
2251 | struct nfs4_exception exception = { }; | |
2252 | int err; | |
2253 | ||
2254 | do { | |
2255 | err = nfs4_handle_exception(server, | |
2256 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2257 | &exception); | |
2258 | } while (exception.retry); | |
2259 | return err; | |
2260 | } | |
2261 | ||
2262 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2263 | { | |
0e574af1 | 2264 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2265 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2266 | } | |
2267 | ||
2268 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2269 | struct nfs_pathconf *pathconf) | |
2270 | { | |
2271 | struct nfs4_pathconf_arg args = { | |
2272 | .fh = fhandle, | |
2273 | .bitmask = server->attr_bitmask, | |
2274 | }; | |
2275 | struct rpc_message msg = { | |
2276 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2277 | .rpc_argp = &args, | |
2278 | .rpc_resp = pathconf, | |
2279 | }; | |
2280 | ||
2281 | /* None of the pathconf attributes are mandatory to implement */ | |
2282 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2283 | memset(pathconf, 0, sizeof(*pathconf)); | |
2284 | return 0; | |
2285 | } | |
2286 | ||
0e574af1 | 2287 | nfs_fattr_init(pathconf->fattr); |
1da177e4 LT |
2288 | return rpc_call_sync(server->client, &msg, 0); |
2289 | } | |
2290 | ||
2291 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2292 | struct nfs_pathconf *pathconf) | |
2293 | { | |
2294 | struct nfs4_exception exception = { }; | |
2295 | int err; | |
2296 | ||
2297 | do { | |
2298 | err = nfs4_handle_exception(server, | |
2299 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2300 | &exception); | |
2301 | } while (exception.retry); | |
2302 | return err; | |
2303 | } | |
2304 | ||
ec06c096 | 2305 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2306 | { |
ec06c096 | 2307 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2308 | |
ec06c096 | 2309 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { |
1da177e4 | 2310 | rpc_restart_call(task); |
ec06c096 | 2311 | return -EAGAIN; |
1da177e4 LT |
2312 | } |
2313 | if (task->tk_status > 0) | |
ec06c096 TM |
2314 | renew_lease(server, data->timestamp); |
2315 | return 0; | |
1da177e4 LT |
2316 | } |
2317 | ||
ec06c096 | 2318 | static void nfs4_proc_read_setup(struct nfs_read_data *data) |
1da177e4 | 2319 | { |
1da177e4 LT |
2320 | struct rpc_message msg = { |
2321 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2322 | .rpc_argp = &data->args, | |
2323 | .rpc_resp = &data->res, | |
2324 | .rpc_cred = data->cred, | |
2325 | }; | |
1da177e4 LT |
2326 | |
2327 | data->timestamp = jiffies; | |
2328 | ||
ec06c096 | 2329 | rpc_call_setup(&data->task, &msg, 0); |
1da177e4 LT |
2330 | } |
2331 | ||
788e7a89 | 2332 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2333 | { |
1da177e4 LT |
2334 | struct inode *inode = data->inode; |
2335 | ||
2336 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2337 | rpc_restart_call(task); | |
788e7a89 | 2338 | return -EAGAIN; |
1da177e4 | 2339 | } |
4f9838c7 | 2340 | if (task->tk_status >= 0) { |
1da177e4 | 2341 | renew_lease(NFS_SERVER(inode), data->timestamp); |
4f9838c7 TM |
2342 | nfs_post_op_update_inode(inode, data->res.fattr); |
2343 | } | |
788e7a89 | 2344 | return 0; |
1da177e4 LT |
2345 | } |
2346 | ||
788e7a89 | 2347 | static void nfs4_proc_write_setup(struct nfs_write_data *data, int how) |
1da177e4 | 2348 | { |
1da177e4 LT |
2349 | struct rpc_message msg = { |
2350 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2351 | .rpc_argp = &data->args, | |
2352 | .rpc_resp = &data->res, | |
2353 | .rpc_cred = data->cred, | |
2354 | }; | |
2355 | struct inode *inode = data->inode; | |
4f9838c7 | 2356 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 2357 | int stable; |
1da177e4 LT |
2358 | |
2359 | if (how & FLUSH_STABLE) { | |
2360 | if (!NFS_I(inode)->ncommit) | |
2361 | stable = NFS_FILE_SYNC; | |
2362 | else | |
2363 | stable = NFS_DATA_SYNC; | |
2364 | } else | |
2365 | stable = NFS_UNSTABLE; | |
2366 | data->args.stable = stable; | |
4f9838c7 TM |
2367 | data->args.bitmask = server->attr_bitmask; |
2368 | data->res.server = server; | |
1da177e4 LT |
2369 | |
2370 | data->timestamp = jiffies; | |
2371 | ||
1da177e4 | 2372 | /* Finalize the task. */ |
788e7a89 | 2373 | rpc_call_setup(&data->task, &msg, 0); |
1da177e4 LT |
2374 | } |
2375 | ||
788e7a89 | 2376 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2377 | { |
1da177e4 LT |
2378 | struct inode *inode = data->inode; |
2379 | ||
2380 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2381 | rpc_restart_call(task); | |
788e7a89 | 2382 | return -EAGAIN; |
1da177e4 | 2383 | } |
4f9838c7 TM |
2384 | if (task->tk_status >= 0) |
2385 | nfs_post_op_update_inode(inode, data->res.fattr); | |
788e7a89 | 2386 | return 0; |
1da177e4 LT |
2387 | } |
2388 | ||
788e7a89 | 2389 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how) |
1da177e4 | 2390 | { |
1da177e4 LT |
2391 | struct rpc_message msg = { |
2392 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2393 | .rpc_argp = &data->args, | |
2394 | .rpc_resp = &data->res, | |
2395 | .rpc_cred = data->cred, | |
2396 | }; | |
788e7a89 | 2397 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2398 | |
4f9838c7 TM |
2399 | data->args.bitmask = server->attr_bitmask; |
2400 | data->res.server = server; | |
2401 | ||
788e7a89 | 2402 | rpc_call_setup(&data->task, &msg, 0); |
1da177e4 LT |
2403 | } |
2404 | ||
2405 | /* | |
2406 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2407 | * standalone procedure for queueing an asynchronous RENEW. | |
2408 | */ | |
963d8fe5 | 2409 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2410 | { |
adfa6f98 | 2411 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2412 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2413 | |
2414 | if (task->tk_status < 0) { | |
2415 | switch (task->tk_status) { | |
2416 | case -NFS4ERR_STALE_CLIENTID: | |
2417 | case -NFS4ERR_EXPIRED: | |
2418 | case -NFS4ERR_CB_PATH_DOWN: | |
2419 | nfs4_schedule_state_recovery(clp); | |
2420 | } | |
2421 | return; | |
2422 | } | |
2423 | spin_lock(&clp->cl_lock); | |
2424 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2425 | clp->cl_last_renewal = timestamp; | |
2426 | spin_unlock(&clp->cl_lock); | |
2427 | } | |
2428 | ||
963d8fe5 TM |
2429 | static const struct rpc_call_ops nfs4_renew_ops = { |
2430 | .rpc_call_done = nfs4_renew_done, | |
2431 | }; | |
2432 | ||
adfa6f98 | 2433 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2434 | { |
2435 | struct rpc_message msg = { | |
2436 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2437 | .rpc_argp = clp, | |
b4454fe1 | 2438 | .rpc_cred = cred, |
1da177e4 LT |
2439 | }; |
2440 | ||
2441 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2442 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2443 | } |
2444 | ||
adfa6f98 | 2445 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2446 | { |
2447 | struct rpc_message msg = { | |
2448 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2449 | .rpc_argp = clp, | |
b4454fe1 | 2450 | .rpc_cred = cred, |
1da177e4 LT |
2451 | }; |
2452 | unsigned long now = jiffies; | |
2453 | int status; | |
2454 | ||
2455 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2456 | if (status < 0) | |
2457 | return status; | |
2458 | spin_lock(&clp->cl_lock); | |
2459 | if (time_before(clp->cl_last_renewal,now)) | |
2460 | clp->cl_last_renewal = now; | |
2461 | spin_unlock(&clp->cl_lock); | |
2462 | return 0; | |
2463 | } | |
2464 | ||
aa1870af BF |
2465 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2466 | { | |
2467 | return (server->caps & NFS_CAP_ACLS) | |
2468 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2469 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2470 | } | |
2471 | ||
2472 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2473 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2474 | * the stack. | |
2475 | */ | |
2476 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2477 | ||
2478 | static void buf_to_pages(const void *buf, size_t buflen, | |
2479 | struct page **pages, unsigned int *pgbase) | |
2480 | { | |
2481 | const void *p = buf; | |
2482 | ||
2483 | *pgbase = offset_in_page(buf); | |
2484 | p -= *pgbase; | |
2485 | while (p < buf + buflen) { | |
2486 | *(pages++) = virt_to_page(p); | |
2487 | p += PAGE_CACHE_SIZE; | |
2488 | } | |
2489 | } | |
2490 | ||
e50a1c2e BF |
2491 | struct nfs4_cached_acl { |
2492 | int cached; | |
2493 | size_t len; | |
3e9d4154 | 2494 | char data[0]; |
e50a1c2e BF |
2495 | }; |
2496 | ||
2497 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2498 | { | |
2499 | struct nfs_inode *nfsi = NFS_I(inode); | |
2500 | ||
2501 | spin_lock(&inode->i_lock); | |
2502 | kfree(nfsi->nfs4_acl); | |
2503 | nfsi->nfs4_acl = acl; | |
2504 | spin_unlock(&inode->i_lock); | |
2505 | } | |
2506 | ||
2507 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2508 | { | |
2509 | nfs4_set_cached_acl(inode, NULL); | |
2510 | } | |
2511 | ||
2512 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2513 | { | |
2514 | struct nfs_inode *nfsi = NFS_I(inode); | |
2515 | struct nfs4_cached_acl *acl; | |
2516 | int ret = -ENOENT; | |
2517 | ||
2518 | spin_lock(&inode->i_lock); | |
2519 | acl = nfsi->nfs4_acl; | |
2520 | if (acl == NULL) | |
2521 | goto out; | |
2522 | if (buf == NULL) /* user is just asking for length */ | |
2523 | goto out_len; | |
2524 | if (acl->cached == 0) | |
2525 | goto out; | |
2526 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2527 | if (acl->len > buflen) | |
2528 | goto out; | |
2529 | memcpy(buf, acl->data, acl->len); | |
2530 | out_len: | |
2531 | ret = acl->len; | |
2532 | out: | |
2533 | spin_unlock(&inode->i_lock); | |
2534 | return ret; | |
2535 | } | |
2536 | ||
2537 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2538 | { | |
2539 | struct nfs4_cached_acl *acl; | |
2540 | ||
2541 | if (buf && acl_len <= PAGE_SIZE) { | |
2542 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2543 | if (acl == NULL) | |
2544 | goto out; | |
2545 | acl->cached = 1; | |
2546 | memcpy(acl->data, buf, acl_len); | |
2547 | } else { | |
2548 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2549 | if (acl == NULL) | |
2550 | goto out; | |
2551 | acl->cached = 0; | |
2552 | } | |
2553 | acl->len = acl_len; | |
2554 | out: | |
2555 | nfs4_set_cached_acl(inode, acl); | |
2556 | } | |
2557 | ||
16b4289c | 2558 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 2559 | { |
aa1870af BF |
2560 | struct page *pages[NFS4ACL_MAXPAGES]; |
2561 | struct nfs_getaclargs args = { | |
2562 | .fh = NFS_FH(inode), | |
2563 | .acl_pages = pages, | |
2564 | .acl_len = buflen, | |
2565 | }; | |
2566 | size_t resp_len = buflen; | |
e50a1c2e | 2567 | void *resp_buf; |
aa1870af BF |
2568 | struct rpc_message msg = { |
2569 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2570 | .rpc_argp = &args, | |
2571 | .rpc_resp = &resp_len, | |
2572 | }; | |
e50a1c2e | 2573 | struct page *localpage = NULL; |
aa1870af BF |
2574 | int ret; |
2575 | ||
e50a1c2e BF |
2576 | if (buflen < PAGE_SIZE) { |
2577 | /* As long as we're doing a round trip to the server anyway, | |
2578 | * let's be prepared for a page of acl data. */ | |
2579 | localpage = alloc_page(GFP_KERNEL); | |
2580 | resp_buf = page_address(localpage); | |
2581 | if (localpage == NULL) | |
2582 | return -ENOMEM; | |
2583 | args.acl_pages[0] = localpage; | |
2584 | args.acl_pgbase = 0; | |
1d95db8e | 2585 | resp_len = args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2586 | } else { |
2587 | resp_buf = buf; | |
2588 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2589 | } | |
aa1870af | 2590 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2591 | if (ret) |
2592 | goto out_free; | |
2593 | if (resp_len > args.acl_len) | |
2594 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2595 | else | |
2596 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2597 | if (buf) { | |
2598 | ret = -ERANGE; | |
2599 | if (resp_len > buflen) | |
2600 | goto out_free; | |
2601 | if (localpage) | |
2602 | memcpy(buf, resp_buf, resp_len); | |
2603 | } | |
2604 | ret = resp_len; | |
2605 | out_free: | |
2606 | if (localpage) | |
2607 | __free_page(localpage); | |
aa1870af BF |
2608 | return ret; |
2609 | } | |
2610 | ||
16b4289c TM |
2611 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
2612 | { | |
2613 | struct nfs4_exception exception = { }; | |
2614 | ssize_t ret; | |
2615 | do { | |
2616 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
2617 | if (ret >= 0) | |
2618 | break; | |
2619 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
2620 | } while (exception.retry); | |
2621 | return ret; | |
2622 | } | |
2623 | ||
e50a1c2e BF |
2624 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2625 | { | |
2626 | struct nfs_server *server = NFS_SERVER(inode); | |
2627 | int ret; | |
2628 | ||
2629 | if (!nfs4_server_supports_acls(server)) | |
2630 | return -EOPNOTSUPP; | |
2631 | ret = nfs_revalidate_inode(server, inode); | |
2632 | if (ret < 0) | |
2633 | return ret; | |
2634 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2635 | if (ret != -ENOENT) | |
2636 | return ret; | |
2637 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2638 | } | |
2639 | ||
16b4289c | 2640 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
2641 | { |
2642 | struct nfs_server *server = NFS_SERVER(inode); | |
2643 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2644 | struct nfs_setaclargs arg = { | |
2645 | .fh = NFS_FH(inode), | |
2646 | .acl_pages = pages, | |
2647 | .acl_len = buflen, | |
2648 | }; | |
2649 | struct rpc_message msg = { | |
2650 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2651 | .rpc_argp = &arg, | |
2652 | .rpc_resp = NULL, | |
2653 | }; | |
2654 | int ret; | |
2655 | ||
2656 | if (!nfs4_server_supports_acls(server)) | |
2657 | return -EOPNOTSUPP; | |
642ac549 | 2658 | nfs_inode_return_delegation(inode); |
4b580ee3 | 2659 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
1f163415 | 2660 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
08efa202 | 2661 | nfs_zap_caches(inode); |
4b580ee3 BF |
2662 | return ret; |
2663 | } | |
2664 | ||
16b4289c TM |
2665 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2666 | { | |
2667 | struct nfs4_exception exception = { }; | |
2668 | int err; | |
2669 | do { | |
2670 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2671 | __nfs4_proc_set_acl(inode, buf, buflen), | |
2672 | &exception); | |
2673 | } while (exception.retry); | |
2674 | return err; | |
2675 | } | |
2676 | ||
1da177e4 | 2677 | static int |
faf5f49c | 2678 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
1da177e4 | 2679 | { |
7539bbab | 2680 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2681 | |
2682 | if (!clp || task->tk_status >= 0) | |
2683 | return 0; | |
2684 | switch(task->tk_status) { | |
2685 | case -NFS4ERR_STALE_CLIENTID: | |
2686 | case -NFS4ERR_STALE_STATEID: | |
2687 | case -NFS4ERR_EXPIRED: | |
2688 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2689 | nfs4_schedule_state_recovery(clp); | |
433fbe4c | 2690 | if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0) |
1da177e4 LT |
2691 | rpc_wake_up_task(task); |
2692 | task->tk_status = 0; | |
2693 | return -EAGAIN; | |
1da177e4 | 2694 | case -NFS4ERR_DELAY: |
006ea73e CL |
2695 | nfs_inc_server_stats((struct nfs_server *) server, |
2696 | NFSIOS_DELAY); | |
2697 | case -NFS4ERR_GRACE: | |
1da177e4 LT |
2698 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
2699 | task->tk_status = 0; | |
2700 | return -EAGAIN; | |
2701 | case -NFS4ERR_OLD_STATEID: | |
2702 | task->tk_status = 0; | |
2703 | return -EAGAIN; | |
2704 | } | |
2705 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2706 | return 0; | |
2707 | } | |
2708 | ||
433fbe4c TM |
2709 | static int nfs4_wait_bit_interruptible(void *word) |
2710 | { | |
2711 | if (signal_pending(current)) | |
2712 | return -ERESTARTSYS; | |
2713 | schedule(); | |
2714 | return 0; | |
2715 | } | |
2716 | ||
adfa6f98 | 2717 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp) |
1da177e4 | 2718 | { |
1da177e4 | 2719 | sigset_t oldset; |
433fbe4c | 2720 | int res; |
1da177e4 LT |
2721 | |
2722 | might_sleep(); | |
2723 | ||
e148582e TM |
2724 | rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_); |
2725 | ||
1da177e4 | 2726 | rpc_clnt_sigmask(clnt, &oldset); |
433fbe4c TM |
2727 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER, |
2728 | nfs4_wait_bit_interruptible, | |
2729 | TASK_INTERRUPTIBLE); | |
1da177e4 | 2730 | rpc_clnt_sigunmask(clnt, &oldset); |
e148582e TM |
2731 | |
2732 | rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_); | |
1da177e4 LT |
2733 | return res; |
2734 | } | |
2735 | ||
2736 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2737 | { | |
2738 | sigset_t oldset; | |
2739 | int res = 0; | |
2740 | ||
2741 | might_sleep(); | |
2742 | ||
2743 | if (*timeout <= 0) | |
2744 | *timeout = NFS4_POLL_RETRY_MIN; | |
2745 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2746 | *timeout = NFS4_POLL_RETRY_MAX; | |
2747 | rpc_clnt_sigmask(clnt, &oldset); | |
2748 | if (clnt->cl_intr) { | |
041e0e3b | 2749 | schedule_timeout_interruptible(*timeout); |
1da177e4 LT |
2750 | if (signalled()) |
2751 | res = -ERESTARTSYS; | |
041e0e3b NA |
2752 | } else |
2753 | schedule_timeout_uninterruptible(*timeout); | |
1da177e4 LT |
2754 | rpc_clnt_sigunmask(clnt, &oldset); |
2755 | *timeout <<= 1; | |
2756 | return res; | |
2757 | } | |
2758 | ||
2759 | /* This is the error handling routine for processes that are allowed | |
2760 | * to sleep. | |
2761 | */ | |
10afec90 | 2762 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
1da177e4 | 2763 | { |
7539bbab | 2764 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2765 | int ret = errorcode; |
2766 | ||
2767 | exception->retry = 0; | |
2768 | switch(errorcode) { | |
2769 | case 0: | |
2770 | return 0; | |
2771 | case -NFS4ERR_STALE_CLIENTID: | |
2772 | case -NFS4ERR_STALE_STATEID: | |
2773 | case -NFS4ERR_EXPIRED: | |
433fbe4c | 2774 | nfs4_schedule_state_recovery(clp); |
1da177e4 LT |
2775 | ret = nfs4_wait_clnt_recover(server->client, clp); |
2776 | if (ret == 0) | |
2777 | exception->retry = 1; | |
2778 | break; | |
c514983d | 2779 | case -NFS4ERR_FILE_OPEN: |
1da177e4 LT |
2780 | case -NFS4ERR_GRACE: |
2781 | case -NFS4ERR_DELAY: | |
2782 | ret = nfs4_delay(server->client, &exception->timeout); | |
2c56617d TM |
2783 | if (ret != 0) |
2784 | break; | |
1da177e4 | 2785 | case -NFS4ERR_OLD_STATEID: |
2c56617d | 2786 | exception->retry = 1; |
1da177e4 LT |
2787 | } |
2788 | /* We failed to handle the error */ | |
2789 | return nfs4_map_errors(ret); | |
2790 | } | |
2791 | ||
adfa6f98 | 2792 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
2793 | { |
2794 | nfs4_verifier sc_verifier; | |
2795 | struct nfs4_setclientid setclientid = { | |
2796 | .sc_verifier = &sc_verifier, | |
2797 | .sc_prog = program, | |
2798 | }; | |
2799 | struct rpc_message msg = { | |
2800 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2801 | .rpc_argp = &setclientid, | |
2802 | .rpc_resp = clp, | |
286d7d6a | 2803 | .rpc_cred = cred, |
1da177e4 | 2804 | }; |
bc4785cd | 2805 | __be32 *p; |
1da177e4 LT |
2806 | int loop = 0; |
2807 | int status; | |
2808 | ||
bc4785cd | 2809 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
2810 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
2811 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2812 | ||
2813 | for(;;) { | |
2814 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2815 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
24c8dbbb | 2816 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr), |
286d7d6a | 2817 | cred->cr_ops->cr_name, |
1da177e4 LT |
2818 | clp->cl_id_uniquifier); |
2819 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2820 | sizeof(setclientid.sc_netid), "tcp"); | |
2821 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2822 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2823 | clp->cl_ipaddr, port >> 8, port & 255); | |
2824 | ||
2825 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2826 | if (status != -NFS4ERR_CLID_INUSE) | |
2827 | break; | |
2828 | if (signalled()) | |
2829 | break; | |
2830 | if (loop++ & 1) | |
2831 | ssleep(clp->cl_lease_time + 1); | |
2832 | else | |
2833 | if (++clp->cl_id_uniquifier == 0) | |
2834 | break; | |
2835 | } | |
2836 | return status; | |
2837 | } | |
2838 | ||
adfa6f98 | 2839 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2840 | { |
2841 | struct nfs_fsinfo fsinfo; | |
2842 | struct rpc_message msg = { | |
2843 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2844 | .rpc_argp = clp, | |
2845 | .rpc_resp = &fsinfo, | |
286d7d6a | 2846 | .rpc_cred = cred, |
1da177e4 LT |
2847 | }; |
2848 | unsigned long now; | |
2849 | int status; | |
2850 | ||
2851 | now = jiffies; | |
2852 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2853 | if (status == 0) { | |
2854 | spin_lock(&clp->cl_lock); | |
2855 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2856 | clp->cl_last_renewal = now; | |
58d9714a | 2857 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
1da177e4 LT |
2858 | spin_unlock(&clp->cl_lock); |
2859 | } | |
2860 | return status; | |
2861 | } | |
2862 | ||
adfa6f98 | 2863 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b TM |
2864 | { |
2865 | long timeout; | |
2866 | int err; | |
2867 | do { | |
2868 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
2869 | switch (err) { | |
2870 | case 0: | |
2871 | return err; | |
2872 | case -NFS4ERR_RESOURCE: | |
2873 | /* The IBM lawyers misread another document! */ | |
2874 | case -NFS4ERR_DELAY: | |
2875 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
2876 | } | |
2877 | } while (err == 0); | |
2878 | return err; | |
2879 | } | |
2880 | ||
fe650407 TM |
2881 | struct nfs4_delegreturndata { |
2882 | struct nfs4_delegreturnargs args; | |
fa178f29 | 2883 | struct nfs4_delegreturnres res; |
fe650407 TM |
2884 | struct nfs_fh fh; |
2885 | nfs4_stateid stateid; | |
2886 | struct rpc_cred *cred; | |
26e976a8 | 2887 | unsigned long timestamp; |
fa178f29 | 2888 | struct nfs_fattr fattr; |
fe650407 TM |
2889 | int rpc_status; |
2890 | }; | |
2891 | ||
2892 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) | |
1da177e4 | 2893 | { |
fe650407 | 2894 | struct nfs4_delegreturndata *data = calldata; |
1da177e4 LT |
2895 | struct rpc_message msg = { |
2896 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
fe650407 | 2897 | .rpc_argp = &data->args, |
fa178f29 | 2898 | .rpc_resp = &data->res, |
fe650407 | 2899 | .rpc_cred = data->cred, |
1da177e4 | 2900 | }; |
fa178f29 | 2901 | nfs_fattr_init(data->res.fattr); |
fe650407 TM |
2902 | rpc_call_setup(task, &msg, 0); |
2903 | } | |
1da177e4 | 2904 | |
fe650407 TM |
2905 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
2906 | { | |
2907 | struct nfs4_delegreturndata *data = calldata; | |
2908 | data->rpc_status = task->tk_status; | |
26e976a8 | 2909 | if (data->rpc_status == 0) |
fa178f29 | 2910 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
2911 | } |
2912 | ||
2913 | static void nfs4_delegreturn_release(void *calldata) | |
2914 | { | |
2915 | struct nfs4_delegreturndata *data = calldata; | |
2916 | ||
2917 | put_rpccred(data->cred); | |
2918 | kfree(calldata); | |
2919 | } | |
2920 | ||
c8d149f3 | 2921 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
fe650407 TM |
2922 | .rpc_call_prepare = nfs4_delegreturn_prepare, |
2923 | .rpc_call_done = nfs4_delegreturn_done, | |
2924 | .rpc_release = nfs4_delegreturn_release, | |
2925 | }; | |
2926 | ||
2927 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2928 | { | |
2929 | struct nfs4_delegreturndata *data; | |
fa178f29 | 2930 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 TM |
2931 | struct rpc_task *task; |
2932 | int status; | |
2933 | ||
2934 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
2935 | if (data == NULL) | |
2936 | return -ENOMEM; | |
2937 | data->args.fhandle = &data->fh; | |
2938 | data->args.stateid = &data->stateid; | |
fa178f29 | 2939 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
2940 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
2941 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
2942 | data->res.fattr = &data->fattr; |
2943 | data->res.server = server; | |
fe650407 | 2944 | data->cred = get_rpccred(cred); |
26e976a8 | 2945 | data->timestamp = jiffies; |
fe650407 TM |
2946 | data->rpc_status = 0; |
2947 | ||
2948 | task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); | |
7a1218a2 | 2949 | if (IS_ERR(task)) |
fe650407 | 2950 | return PTR_ERR(task); |
fe650407 | 2951 | status = nfs4_wait_for_completion_rpc_task(task); |
fa178f29 | 2952 | if (status == 0) { |
fe650407 | 2953 | status = data->rpc_status; |
fa178f29 TM |
2954 | if (status == 0) |
2955 | nfs_post_op_update_inode(inode, &data->fattr); | |
2956 | } | |
e6b3c4db | 2957 | rpc_put_task(task); |
fe650407 | 2958 | return status; |
1da177e4 LT |
2959 | } |
2960 | ||
2961 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2962 | { | |
2963 | struct nfs_server *server = NFS_SERVER(inode); | |
2964 | struct nfs4_exception exception = { }; | |
2965 | int err; | |
2966 | do { | |
2967 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
2968 | switch (err) { | |
2969 | case -NFS4ERR_STALE_STATEID: | |
2970 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
2971 | case 0: |
2972 | return 0; | |
2973 | } | |
2974 | err = nfs4_handle_exception(server, err, &exception); | |
2975 | } while (exception.retry); | |
2976 | return err; | |
2977 | } | |
2978 | ||
2979 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
2980 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
2981 | ||
2982 | /* | |
2983 | * sleep, with exponential backoff, and retry the LOCK operation. | |
2984 | */ | |
2985 | static unsigned long | |
2986 | nfs4_set_lock_task_retry(unsigned long timeout) | |
2987 | { | |
041e0e3b | 2988 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
2989 | timeout <<= 1; |
2990 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
2991 | return NFS4_LOCK_MAXTIMEOUT; | |
2992 | return timeout; | |
2993 | } | |
2994 | ||
1da177e4 LT |
2995 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
2996 | { | |
2997 | struct inode *inode = state->inode; | |
2998 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 2999 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3000 | struct nfs_lockt_args arg = { |
1da177e4 | 3001 | .fh = NFS_FH(inode), |
911d1aaf | 3002 | .fl = request, |
1da177e4 | 3003 | }; |
911d1aaf TM |
3004 | struct nfs_lockt_res res = { |
3005 | .denied = request, | |
1da177e4 LT |
3006 | }; |
3007 | struct rpc_message msg = { | |
3008 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3009 | .rpc_argp = &arg, | |
3010 | .rpc_resp = &res, | |
3011 | .rpc_cred = state->owner->so_cred, | |
3012 | }; | |
1da177e4 LT |
3013 | struct nfs4_lock_state *lsp; |
3014 | int status; | |
3015 | ||
3016 | down_read(&clp->cl_sem); | |
911d1aaf | 3017 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3018 | status = nfs4_set_lock_state(state, request); |
3019 | if (status != 0) | |
3020 | goto out; | |
3021 | lsp = request->fl_u.nfs4_fl.owner; | |
911d1aaf | 3022 | arg.lock_owner.id = lsp->ls_id; |
1da177e4 | 3023 | status = rpc_call_sync(server->client, &msg, 0); |
911d1aaf TM |
3024 | switch (status) { |
3025 | case 0: | |
3026 | request->fl_type = F_UNLCK; | |
3027 | break; | |
3028 | case -NFS4ERR_DENIED: | |
3029 | status = 0; | |
1da177e4 | 3030 | } |
70cc6487 | 3031 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3032 | out: |
1da177e4 LT |
3033 | up_read(&clp->cl_sem); |
3034 | return status; | |
3035 | } | |
3036 | ||
3037 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3038 | { | |
3039 | struct nfs4_exception exception = { }; | |
3040 | int err; | |
3041 | ||
3042 | do { | |
3043 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3044 | _nfs4_proc_getlk(state, cmd, request), | |
3045 | &exception); | |
3046 | } while (exception.retry); | |
3047 | return err; | |
3048 | } | |
3049 | ||
3050 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3051 | { | |
3052 | int res = 0; | |
3053 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3054 | case FL_POSIX: | |
3055 | res = posix_lock_file_wait(file, fl); | |
3056 | break; | |
3057 | case FL_FLOCK: | |
3058 | res = flock_lock_file_wait(file, fl); | |
3059 | break; | |
3060 | default: | |
3061 | BUG(); | |
3062 | } | |
1da177e4 LT |
3063 | return res; |
3064 | } | |
3065 | ||
faf5f49c | 3066 | struct nfs4_unlockdata { |
911d1aaf TM |
3067 | struct nfs_locku_args arg; |
3068 | struct nfs_locku_res res; | |
faf5f49c TM |
3069 | struct nfs4_lock_state *lsp; |
3070 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3071 | struct file_lock fl; |
3072 | const struct nfs_server *server; | |
26e976a8 | 3073 | unsigned long timestamp; |
faf5f49c TM |
3074 | }; |
3075 | ||
911d1aaf TM |
3076 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3077 | struct nfs_open_context *ctx, | |
3078 | struct nfs4_lock_state *lsp, | |
3079 | struct nfs_seqid *seqid) | |
3080 | { | |
3081 | struct nfs4_unlockdata *p; | |
3082 | struct inode *inode = lsp->ls_state->inode; | |
3083 | ||
3084 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3085 | if (p == NULL) | |
3086 | return NULL; | |
3087 | p->arg.fh = NFS_FH(inode); | |
3088 | p->arg.fl = &p->fl; | |
3089 | p->arg.seqid = seqid; | |
3090 | p->arg.stateid = &lsp->ls_stateid; | |
3091 | p->lsp = lsp; | |
3092 | atomic_inc(&lsp->ls_count); | |
3093 | /* Ensure we don't close file until we're done freeing locks! */ | |
3094 | p->ctx = get_nfs_open_context(ctx); | |
3095 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3096 | p->server = NFS_SERVER(inode); | |
3097 | return p; | |
3098 | } | |
3099 | ||
06f814a3 | 3100 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3101 | { |
963d8fe5 | 3102 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3103 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3104 | nfs4_put_lock_state(calldata->lsp); |
3105 | put_nfs_open_context(calldata->ctx); | |
3106 | kfree(calldata); | |
faf5f49c TM |
3107 | } |
3108 | ||
963d8fe5 | 3109 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3110 | { |
963d8fe5 | 3111 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3112 | |
06f814a3 TM |
3113 | if (RPC_ASSASSINATED(task)) |
3114 | return; | |
911d1aaf | 3115 | nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); |
faf5f49c TM |
3116 | switch (task->tk_status) { |
3117 | case 0: | |
3118 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3119 | calldata->res.stateid.data, |
faf5f49c | 3120 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3121 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c TM |
3122 | break; |
3123 | case -NFS4ERR_STALE_STATEID: | |
3124 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3125 | break; |
3126 | default: | |
a6a352e9 | 3127 | if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) |
faf5f49c | 3128 | rpc_restart_call(task); |
faf5f49c | 3129 | } |
faf5f49c TM |
3130 | } |
3131 | ||
4ce70ada | 3132 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3133 | { |
4ce70ada | 3134 | struct nfs4_unlockdata *calldata = data; |
1da177e4 LT |
3135 | struct rpc_message msg = { |
3136 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
faf5f49c TM |
3137 | .rpc_argp = &calldata->arg, |
3138 | .rpc_resp = &calldata->res, | |
3139 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
1da177e4 | 3140 | }; |
faf5f49c | 3141 | |
911d1aaf | 3142 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3143 | return; |
3144 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3145 | /* Note: exit _without_ running nfs4_locku_done */ |
3146 | task->tk_action = NULL; | |
faf5f49c TM |
3147 | return; |
3148 | } | |
26e976a8 | 3149 | calldata->timestamp = jiffies; |
faf5f49c TM |
3150 | rpc_call_setup(task, &msg, 0); |
3151 | } | |
3152 | ||
963d8fe5 | 3153 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3154 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3155 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3156 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3157 | }; |
3158 | ||
a5d16a4d TM |
3159 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3160 | struct nfs_open_context *ctx, | |
3161 | struct nfs4_lock_state *lsp, | |
3162 | struct nfs_seqid *seqid) | |
3163 | { | |
3164 | struct nfs4_unlockdata *data; | |
a5d16a4d TM |
3165 | |
3166 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
3167 | if (data == NULL) { | |
3168 | nfs_free_seqid(seqid); | |
3169 | return ERR_PTR(-ENOMEM); | |
3170 | } | |
3171 | ||
7a1218a2 | 3172 | return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); |
a5d16a4d TM |
3173 | } |
3174 | ||
faf5f49c TM |
3175 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3176 | { | |
911d1aaf | 3177 | struct nfs_seqid *seqid; |
1da177e4 | 3178 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3179 | struct rpc_task *task; |
3180 | int status = 0; | |
faf5f49c | 3181 | |
8d0a8a9d | 3182 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3183 | /* Unlock _before_ we do the RPC call */ |
3184 | request->fl_flags |= FL_EXISTS; | |
3185 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) | |
3186 | goto out; | |
8d0a8a9d | 3187 | if (status != 0) |
9b073574 TM |
3188 | goto out; |
3189 | /* Is this a delegated lock? */ | |
3190 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3191 | goto out; | |
8d0a8a9d | 3192 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3193 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3194 | status = -ENOMEM; |
911d1aaf | 3195 | if (seqid == NULL) |
9b073574 | 3196 | goto out; |
a5d16a4d TM |
3197 | task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); |
3198 | status = PTR_ERR(task); | |
3199 | if (IS_ERR(task)) | |
9b073574 | 3200 | goto out; |
a5d16a4d | 3201 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3202 | rpc_put_task(task); |
9b073574 | 3203 | out: |
1da177e4 LT |
3204 | return status; |
3205 | } | |
3206 | ||
a5d16a4d TM |
3207 | struct nfs4_lockdata { |
3208 | struct nfs_lock_args arg; | |
3209 | struct nfs_lock_res res; | |
3210 | struct nfs4_lock_state *lsp; | |
3211 | struct nfs_open_context *ctx; | |
3212 | struct file_lock fl; | |
26e976a8 | 3213 | unsigned long timestamp; |
a5d16a4d TM |
3214 | int rpc_status; |
3215 | int cancelled; | |
3216 | }; | |
3217 | ||
3218 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3219 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3220 | { |
a5d16a4d TM |
3221 | struct nfs4_lockdata *p; |
3222 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3223 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3224 | |
3225 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3226 | if (p == NULL) | |
3227 | return NULL; | |
3228 | ||
3229 | p->arg.fh = NFS_FH(inode); | |
3230 | p->arg.fl = &p->fl; | |
3231 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3232 | if (p->arg.lock_seqid == NULL) | |
3233 | goto out_free; | |
3234 | p->arg.lock_stateid = &lsp->ls_stateid; | |
7539bbab | 3235 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
a5d16a4d TM |
3236 | p->arg.lock_owner.id = lsp->ls_id; |
3237 | p->lsp = lsp; | |
3238 | atomic_inc(&lsp->ls_count); | |
3239 | p->ctx = get_nfs_open_context(ctx); | |
3240 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3241 | return p; | |
3242 | out_free: | |
3243 | kfree(p); | |
3244 | return NULL; | |
3245 | } | |
3246 | ||
3247 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3248 | { | |
3249 | struct nfs4_lockdata *data = calldata; | |
3250 | struct nfs4_state *state = data->lsp->ls_state; | |
3251 | struct nfs4_state_owner *sp = state->owner; | |
1da177e4 | 3252 | struct rpc_message msg = { |
a5d16a4d TM |
3253 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
3254 | .rpc_argp = &data->arg, | |
3255 | .rpc_resp = &data->res, | |
3256 | .rpc_cred = sp->so_cred, | |
1da177e4 | 3257 | }; |
06735b34 | 3258 | |
a5d16a4d TM |
3259 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3260 | return; | |
3261 | dprintk("%s: begin!\n", __FUNCTION__); | |
3262 | /* Do we need to do an open_to_lock_owner? */ | |
3263 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
3264 | data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); | |
3265 | if (data->arg.open_seqid == NULL) { | |
3266 | data->rpc_status = -ENOMEM; | |
3267 | task->tk_action = NULL; | |
06735b34 | 3268 | goto out; |
8d0a8a9d | 3269 | } |
a5d16a4d TM |
3270 | data->arg.open_stateid = &state->stateid; |
3271 | data->arg.new_lock_owner = 1; | |
3272 | } | |
26e976a8 | 3273 | data->timestamp = jiffies; |
a5d16a4d | 3274 | rpc_call_setup(task, &msg, 0); |
06735b34 | 3275 | out: |
a5d16a4d TM |
3276 | dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); |
3277 | } | |
3278 | ||
3279 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3280 | { | |
3281 | struct nfs4_lockdata *data = calldata; | |
3282 | ||
3283 | dprintk("%s: begin!\n", __FUNCTION__); | |
3284 | ||
3285 | data->rpc_status = task->tk_status; | |
3286 | if (RPC_ASSASSINATED(task)) | |
3287 | goto out; | |
3288 | if (data->arg.new_lock_owner != 0) { | |
3289 | nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); | |
3290 | if (data->rpc_status == 0) | |
3291 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3292 | else | |
3293 | goto out; | |
3294 | } | |
3295 | if (data->rpc_status == 0) { | |
3296 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3297 | sizeof(data->lsp->ls_stateid.data)); | |
3298 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3299 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d TM |
3300 | } |
3301 | nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); | |
3302 | out: | |
3303 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); | |
3304 | } | |
3305 | ||
3306 | static void nfs4_lock_release(void *calldata) | |
3307 | { | |
3308 | struct nfs4_lockdata *data = calldata; | |
3309 | ||
3310 | dprintk("%s: begin!\n", __FUNCTION__); | |
3311 | if (data->arg.open_seqid != NULL) | |
3312 | nfs_free_seqid(data->arg.open_seqid); | |
3313 | if (data->cancelled != 0) { | |
3314 | struct rpc_task *task; | |
3315 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3316 | data->arg.lock_seqid); | |
3317 | if (!IS_ERR(task)) | |
e6b3c4db | 3318 | rpc_put_task(task); |
a5d16a4d TM |
3319 | dprintk("%s: cancelling lock!\n", __FUNCTION__); |
3320 | } else | |
3321 | nfs_free_seqid(data->arg.lock_seqid); | |
3322 | nfs4_put_lock_state(data->lsp); | |
3323 | put_nfs_open_context(data->ctx); | |
3324 | kfree(data); | |
3325 | dprintk("%s: done!\n", __FUNCTION__); | |
3326 | } | |
3327 | ||
3328 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3329 | .rpc_call_prepare = nfs4_lock_prepare, | |
3330 | .rpc_call_done = nfs4_lock_done, | |
3331 | .rpc_release = nfs4_lock_release, | |
3332 | }; | |
3333 | ||
3334 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3335 | { | |
3336 | struct nfs4_lockdata *data; | |
3337 | struct rpc_task *task; | |
3338 | int ret; | |
3339 | ||
3340 | dprintk("%s: begin!\n", __FUNCTION__); | |
3341 | data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, | |
3342 | fl->fl_u.nfs4_fl.owner); | |
3343 | if (data == NULL) | |
3344 | return -ENOMEM; | |
3345 | if (IS_SETLKW(cmd)) | |
3346 | data->arg.block = 1; | |
3347 | if (reclaim != 0) | |
3348 | data->arg.reclaim = 1; | |
3349 | task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, | |
3350 | &nfs4_lock_ops, data); | |
7a1218a2 | 3351 | if (IS_ERR(task)) |
a5d16a4d | 3352 | return PTR_ERR(task); |
a5d16a4d TM |
3353 | ret = nfs4_wait_for_completion_rpc_task(task); |
3354 | if (ret == 0) { | |
3355 | ret = data->rpc_status; | |
3356 | if (ret == -NFS4ERR_DENIED) | |
3357 | ret = -EAGAIN; | |
3358 | } else | |
3359 | data->cancelled = 1; | |
e6b3c4db | 3360 | rpc_put_task(task); |
a5d16a4d TM |
3361 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); |
3362 | return ret; | |
1da177e4 LT |
3363 | } |
3364 | ||
3365 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3366 | { | |
202b50dc TM |
3367 | struct nfs_server *server = NFS_SERVER(state->inode); |
3368 | struct nfs4_exception exception = { }; | |
3369 | int err; | |
3370 | ||
3371 | do { | |
42a2d13e TM |
3372 | /* Cache the lock if possible... */ |
3373 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3374 | return 0; | |
202b50dc TM |
3375 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3376 | if (err != -NFS4ERR_DELAY) | |
3377 | break; | |
3378 | nfs4_handle_exception(server, err, &exception); | |
3379 | } while (exception.retry); | |
3380 | return err; | |
1da177e4 LT |
3381 | } |
3382 | ||
3383 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3384 | { | |
202b50dc TM |
3385 | struct nfs_server *server = NFS_SERVER(state->inode); |
3386 | struct nfs4_exception exception = { }; | |
3387 | int err; | |
3388 | ||
6bfc93ef TM |
3389 | err = nfs4_set_lock_state(state, request); |
3390 | if (err != 0) | |
3391 | return err; | |
202b50dc | 3392 | do { |
42a2d13e TM |
3393 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3394 | return 0; | |
202b50dc TM |
3395 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3396 | if (err != -NFS4ERR_DELAY) | |
3397 | break; | |
3398 | nfs4_handle_exception(server, err, &exception); | |
3399 | } while (exception.retry); | |
3400 | return err; | |
1da177e4 LT |
3401 | } |
3402 | ||
3403 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3404 | { | |
adfa6f98 | 3405 | struct nfs_client *clp = state->owner->so_client; |
01c3b861 | 3406 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3407 | int status; |
3408 | ||
6bfc93ef | 3409 | /* Is this a delegated open? */ |
6bfc93ef TM |
3410 | status = nfs4_set_lock_state(state, request); |
3411 | if (status != 0) | |
3412 | goto out; | |
01c3b861 TM |
3413 | request->fl_flags |= FL_ACCESS; |
3414 | status = do_vfs_lock(request->fl_file, request); | |
3415 | if (status < 0) | |
3416 | goto out; | |
3417 | down_read(&clp->cl_sem); | |
3418 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3419 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
3420 | /* Yes: cache locks! */ | |
3421 | down_read(&nfsi->rwsem); | |
3422 | /* ...but avoid races with delegation recall... */ | |
3423 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3424 | request->fl_flags = fl_flags & ~FL_SLEEP; | |
3425 | status = do_vfs_lock(request->fl_file, request); | |
3426 | up_read(&nfsi->rwsem); | |
3427 | goto out_unlock; | |
3428 | } | |
3429 | up_read(&nfsi->rwsem); | |
3430 | } | |
6bfc93ef TM |
3431 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3432 | if (status != 0) | |
01c3b861 | 3433 | goto out_unlock; |
6bfc93ef | 3434 | /* Note: we always want to sleep here! */ |
01c3b861 | 3435 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef TM |
3436 | if (do_vfs_lock(request->fl_file, request) < 0) |
3437 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
01c3b861 | 3438 | out_unlock: |
1da177e4 | 3439 | up_read(&clp->cl_sem); |
01c3b861 TM |
3440 | out: |
3441 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3442 | return status; |
3443 | } | |
3444 | ||
3445 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3446 | { | |
3447 | struct nfs4_exception exception = { }; | |
3448 | int err; | |
3449 | ||
3450 | do { | |
3451 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3452 | _nfs4_proc_setlk(state, cmd, request), | |
3453 | &exception); | |
3454 | } while (exception.retry); | |
3455 | return err; | |
3456 | } | |
3457 | ||
3458 | static int | |
3459 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3460 | { | |
3461 | struct nfs_open_context *ctx; | |
3462 | struct nfs4_state *state; | |
3463 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3464 | int status; | |
3465 | ||
3466 | /* verify open state */ | |
3467 | ctx = (struct nfs_open_context *)filp->private_data; | |
3468 | state = ctx->state; | |
3469 | ||
3470 | if (request->fl_start < 0 || request->fl_end < 0) | |
3471 | return -EINVAL; | |
3472 | ||
3473 | if (IS_GETLK(cmd)) | |
3474 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3475 | ||
3476 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3477 | return -EINVAL; | |
3478 | ||
3479 | if (request->fl_type == F_UNLCK) | |
3480 | return nfs4_proc_unlck(state, cmd, request); | |
3481 | ||
3482 | do { | |
3483 | status = nfs4_proc_setlk(state, cmd, request); | |
3484 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3485 | break; | |
3486 | timeout = nfs4_set_lock_task_retry(timeout); | |
3487 | status = -ERESTARTSYS; | |
3488 | if (signalled()) | |
3489 | break; | |
3490 | } while(status < 0); | |
1da177e4 LT |
3491 | return status; |
3492 | } | |
3493 | ||
888e694c TM |
3494 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3495 | { | |
3496 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3497 | struct nfs4_exception exception = { }; | |
3498 | int err; | |
3499 | ||
3500 | err = nfs4_set_lock_state(state, fl); | |
3501 | if (err != 0) | |
3502 | goto out; | |
3503 | do { | |
3504 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3505 | if (err != -NFS4ERR_DELAY) | |
3506 | break; | |
3507 | err = nfs4_handle_exception(server, err, &exception); | |
3508 | } while (exception.retry); | |
3509 | out: | |
3510 | return err; | |
3511 | } | |
6b3b5496 | 3512 | |
aa1870af BF |
3513 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3514 | ||
6b3b5496 BF |
3515 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3516 | size_t buflen, int flags) | |
3517 | { | |
4b580ee3 BF |
3518 | struct inode *inode = dentry->d_inode; |
3519 | ||
3520 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3521 | return -EOPNOTSUPP; | |
3522 | ||
3523 | if (!S_ISREG(inode->i_mode) && | |
3524 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3525 | return -EPERM; | |
3526 | ||
3527 | return nfs4_proc_set_acl(inode, buf, buflen); | |
6b3b5496 BF |
3528 | } |
3529 | ||
3530 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3531 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3532 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3533 | * attributes in kernel-managed attribute namespaces. */ | |
3534 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3535 | size_t buflen) | |
3536 | { | |
aa1870af BF |
3537 | struct inode *inode = dentry->d_inode; |
3538 | ||
3539 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3540 | return -EOPNOTSUPP; | |
3541 | ||
3542 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3543 | } |
3544 | ||
3545 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3546 | { | |
aa1870af | 3547 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 3548 | |
096455a2 BF |
3549 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
3550 | return 0; | |
6b3b5496 BF |
3551 | if (buf && buflen < len) |
3552 | return -ERANGE; | |
3553 | if (buf) | |
aa1870af BF |
3554 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3555 | return len; | |
6b3b5496 BF |
3556 | } |
3557 | ||
c228fd3a | 3558 | int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name, |
7aaa0b3b | 3559 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
3560 | { |
3561 | struct nfs_server *server = NFS_SERVER(dir); | |
3562 | u32 bitmask[2] = { | |
361e624f MN |
3563 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
3564 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
3565 | }; |
3566 | struct nfs4_fs_locations_arg args = { | |
3567 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 3568 | .name = name, |
683b57b4 TM |
3569 | .page = page, |
3570 | .bitmask = bitmask, | |
3571 | }; | |
3572 | struct rpc_message msg = { | |
3573 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3574 | .rpc_argp = &args, | |
7aaa0b3b | 3575 | .rpc_resp = fs_locations, |
683b57b4 TM |
3576 | }; |
3577 | int status; | |
3578 | ||
3579 | dprintk("%s: start\n", __FUNCTION__); | |
c228fd3a | 3580 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 3581 | fs_locations->server = server; |
830b8e33 | 3582 | fs_locations->nlocations = 0; |
683b57b4 TM |
3583 | status = rpc_call_sync(server->client, &msg, 0); |
3584 | dprintk("%s: returned status = %d\n", __FUNCTION__, status); | |
3585 | return status; | |
3586 | } | |
3587 | ||
1da177e4 LT |
3588 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
3589 | .recover_open = nfs4_open_reclaim, | |
3590 | .recover_lock = nfs4_lock_reclaim, | |
3591 | }; | |
3592 | ||
3593 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3594 | .recover_open = nfs4_open_expired, | |
3595 | .recover_lock = nfs4_lock_expired, | |
3596 | }; | |
3597 | ||
92e1d5be | 3598 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
3599 | .permission = nfs_permission, |
3600 | .getattr = nfs_getattr, | |
3601 | .setattr = nfs_setattr, | |
3602 | .getxattr = nfs4_getxattr, | |
3603 | .setxattr = nfs4_setxattr, | |
3604 | .listxattr = nfs4_listxattr, | |
3605 | }; | |
3606 | ||
509de811 | 3607 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
3608 | .version = 4, /* protocol version */ |
3609 | .dentry_ops = &nfs4_dentry_operations, | |
3610 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3611 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3612 | .getroot = nfs4_proc_get_root, |
3613 | .getattr = nfs4_proc_getattr, | |
3614 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 3615 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
3616 | .lookup = nfs4_proc_lookup, |
3617 | .access = nfs4_proc_access, | |
3618 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
3619 | .create = nfs4_proc_create, |
3620 | .remove = nfs4_proc_remove, | |
3621 | .unlink_setup = nfs4_proc_unlink_setup, | |
3622 | .unlink_done = nfs4_proc_unlink_done, | |
3623 | .rename = nfs4_proc_rename, | |
3624 | .link = nfs4_proc_link, | |
3625 | .symlink = nfs4_proc_symlink, | |
3626 | .mkdir = nfs4_proc_mkdir, | |
3627 | .rmdir = nfs4_proc_remove, | |
3628 | .readdir = nfs4_proc_readdir, | |
3629 | .mknod = nfs4_proc_mknod, | |
3630 | .statfs = nfs4_proc_statfs, | |
3631 | .fsinfo = nfs4_proc_fsinfo, | |
3632 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 3633 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
3634 | .decode_dirent = nfs4_decode_dirent, |
3635 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 3636 | .read_done = nfs4_read_done, |
1da177e4 | 3637 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 3638 | .write_done = nfs4_write_done, |
1da177e4 | 3639 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 3640 | .commit_done = nfs4_commit_done, |
02a913a7 TM |
3641 | .file_open = nfs_open, |
3642 | .file_release = nfs_release, | |
1da177e4 | 3643 | .lock = nfs4_proc_lock, |
e50a1c2e | 3644 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3645 | }; |
3646 | ||
3647 | /* | |
3648 | * Local variables: | |
3649 | * c-basic-offset: 8 | |
3650 | * End: | |
3651 | */ |