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 { |
c6d00e63 | 217 | struct kref kref; |
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 | ||
2ced46c2 TM |
233 | |
234 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
235 | { | |
236 | p->o_res.f_attr = &p->f_attr; | |
237 | p->o_res.dir_attr = &p->dir_attr; | |
238 | p->o_res.server = p->o_arg.server; | |
239 | nfs_fattr_init(&p->f_attr); | |
240 | nfs_fattr_init(&p->dir_attr); | |
241 | } | |
242 | ||
ad389da7 | 243 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
e56e0b78 TM |
244 | struct nfs4_state_owner *sp, int flags, |
245 | const struct iattr *attrs) | |
246 | { | |
ad389da7 | 247 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
248 | struct inode *dir = parent->d_inode; |
249 | struct nfs_server *server = NFS_SERVER(dir); | |
250 | struct nfs4_opendata *p; | |
251 | ||
252 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
253 | if (p == NULL) | |
254 | goto err; | |
255 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
256 | if (p->o_arg.seqid == NULL) | |
257 | goto err_free; | |
ad389da7 TM |
258 | p->path.mnt = mntget(path->mnt); |
259 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
260 | p->dir = parent; |
261 | p->owner = sp; | |
262 | atomic_inc(&sp->so_count); | |
263 | p->o_arg.fh = NFS_FH(dir); | |
264 | p->o_arg.open_flags = flags, | |
7539bbab | 265 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 266 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 267 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
268 | p->o_arg.server = server; |
269 | p->o_arg.bitmask = server->attr_bitmask; | |
270 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
e56e0b78 TM |
271 | if (flags & O_EXCL) { |
272 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
273 | s[0] = jiffies; | |
274 | s[1] = current->pid; | |
275 | } else if (flags & O_CREAT) { | |
276 | p->o_arg.u.attrs = &p->attrs; | |
277 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
278 | } | |
cdd4e68b TM |
279 | p->c_arg.fh = &p->o_res.fh; |
280 | p->c_arg.stateid = &p->o_res.stateid; | |
281 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 282 | nfs4_init_opendata_res(p); |
c6d00e63 | 283 | kref_init(&p->kref); |
e56e0b78 TM |
284 | return p; |
285 | err_free: | |
286 | kfree(p); | |
287 | err: | |
288 | dput(parent); | |
289 | return NULL; | |
290 | } | |
291 | ||
c6d00e63 | 292 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 293 | { |
c6d00e63 TM |
294 | struct nfs4_opendata *p = container_of(kref, |
295 | struct nfs4_opendata, kref); | |
296 | ||
297 | nfs_free_seqid(p->o_arg.seqid); | |
298 | nfs4_put_state_owner(p->owner); | |
299 | dput(p->dir); | |
300 | dput(p->path.dentry); | |
301 | mntput(p->path.mnt); | |
302 | kfree(p); | |
303 | } | |
304 | ||
305 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
306 | { | |
307 | if (p != NULL) | |
308 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
309 | } |
310 | ||
06f814a3 TM |
311 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
312 | { | |
313 | sigset_t oldset; | |
314 | int ret; | |
315 | ||
316 | rpc_clnt_sigmask(task->tk_client, &oldset); | |
317 | ret = rpc_wait_for_completion_task(task); | |
318 | rpc_clnt_sigunmask(task->tk_client, &oldset); | |
319 | return ret; | |
320 | } | |
321 | ||
e7616923 TM |
322 | static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags) |
323 | { | |
324 | switch (open_flags) { | |
325 | case FMODE_WRITE: | |
326 | state->n_wronly++; | |
327 | break; | |
328 | case FMODE_READ: | |
329 | state->n_rdonly++; | |
330 | break; | |
331 | case FMODE_READ|FMODE_WRITE: | |
332 | state->n_rdwr++; | |
333 | } | |
334 | } | |
335 | ||
1da177e4 LT |
336 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
337 | { | |
338 | struct inode *inode = state->inode; | |
339 | ||
340 | open_flags &= (FMODE_READ|FMODE_WRITE); | |
d530838b | 341 | /* Protect against nfs4_find_state_byowner() */ |
ec073428 | 342 | spin_lock(&state->owner->so_lock); |
1da177e4 | 343 | spin_lock(&inode->i_lock); |
4cecb76f | 344 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
e7616923 | 345 | update_open_stateflags(state, open_flags); |
4cecb76f | 346 | nfs4_state_set_mode_locked(state, state->state | open_flags); |
1da177e4 | 347 | spin_unlock(&inode->i_lock); |
ec073428 | 348 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
349 | } |
350 | ||
24ac23ab TM |
351 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
352 | { | |
353 | struct inode *inode; | |
354 | struct nfs4_state *state = NULL; | |
355 | ||
356 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
357 | goto out; | |
358 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
03f28e3a | 359 | if (IS_ERR(inode)) |
24ac23ab TM |
360 | goto out; |
361 | state = nfs4_get_open_state(inode, data->owner); | |
362 | if (state == NULL) | |
363 | goto put_inode; | |
364 | update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags); | |
549d6ed5 TM |
365 | if (data->o_res.delegation_type != 0) { |
366 | struct nfs_inode *nfsi = NFS_I(inode); | |
367 | int delegation_flags = 0; | |
368 | ||
369 | if (nfsi->delegation) | |
370 | delegation_flags = nfsi->delegation->flags; | |
371 | if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM)) | |
372 | nfs_inode_set_delegation(state->inode, | |
373 | data->owner->so_cred, | |
374 | &data->o_res); | |
375 | else | |
376 | nfs_inode_reclaim_delegation(state->inode, | |
377 | data->owner->so_cred, | |
378 | &data->o_res); | |
379 | } | |
24ac23ab TM |
380 | put_inode: |
381 | iput(inode); | |
382 | out: | |
383 | return state; | |
384 | } | |
385 | ||
864472e9 TM |
386 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
387 | { | |
388 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
389 | struct nfs_open_context *ctx; | |
390 | ||
391 | spin_lock(&state->inode->i_lock); | |
392 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
393 | if (ctx->state != state) | |
394 | continue; | |
395 | get_nfs_open_context(ctx); | |
396 | spin_unlock(&state->inode->i_lock); | |
397 | return ctx; | |
398 | } | |
399 | spin_unlock(&state->inode->i_lock); | |
400 | return ERR_PTR(-ENOENT); | |
401 | } | |
402 | ||
2ced46c2 | 403 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res) |
864472e9 | 404 | { |
2ced46c2 | 405 | struct nfs4_state *newstate; |
864472e9 TM |
406 | int ret; |
407 | ||
408 | opendata->o_arg.open_flags = openflags; | |
2ced46c2 TM |
409 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
410 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
411 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
412 | ret = _nfs4_proc_open(opendata); |
413 | if (ret != 0) | |
414 | return ret; | |
2ced46c2 TM |
415 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
416 | if (newstate != NULL) | |
417 | nfs4_close_state(&opendata->path, newstate, openflags); | |
418 | *res = newstate; | |
864472e9 TM |
419 | return 0; |
420 | } | |
421 | ||
422 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
423 | { | |
864472e9 | 424 | struct nfs4_state *newstate; |
864472e9 TM |
425 | int ret; |
426 | ||
427 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 428 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
429 | smp_rmb(); |
430 | if (state->n_rdwr != 0) { | |
2ced46c2 | 431 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
432 | if (ret != 0) |
433 | return ret; | |
2ced46c2 TM |
434 | if (newstate != state) |
435 | return -ESTALE; | |
864472e9 TM |
436 | } |
437 | if (state->n_wronly != 0) { | |
2ced46c2 | 438 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
439 | if (ret != 0) |
440 | return ret; | |
2ced46c2 TM |
441 | if (newstate != state) |
442 | return -ESTALE; | |
864472e9 TM |
443 | } |
444 | if (state->n_rdonly != 0) { | |
2ced46c2 | 445 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
446 | if (ret != 0) |
447 | return ret; | |
2ced46c2 TM |
448 | if (newstate != state) |
449 | return -ESTALE; | |
864472e9 | 450 | } |
864472e9 TM |
451 | return 0; |
452 | } | |
453 | ||
1da177e4 LT |
454 | /* |
455 | * OPEN_RECLAIM: | |
456 | * reclaim state on the server after a reboot. | |
1da177e4 | 457 | */ |
539cd03a | 458 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 459 | { |
864472e9 TM |
460 | struct nfs_delegation *delegation = NFS_I(state->inode)->delegation; |
461 | struct nfs4_opendata *opendata; | |
462 | int delegation_type = 0; | |
1da177e4 LT |
463 | int status; |
464 | ||
465 | if (delegation != NULL) { | |
466 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
467 | memcpy(&state->stateid, &delegation->stateid, | |
468 | sizeof(state->stateid)); | |
469 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
470 | return 0; | |
471 | } | |
864472e9 | 472 | delegation_type = delegation->type; |
1da177e4 | 473 | } |
ad389da7 | 474 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL); |
864472e9 | 475 | if (opendata == NULL) |
cee54fc9 | 476 | return -ENOMEM; |
864472e9 TM |
477 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
478 | opendata->o_arg.fh = NFS_FH(state->inode); | |
479 | nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh); | |
480 | opendata->o_arg.u.delegation_type = delegation_type; | |
481 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 482 | nfs4_opendata_put(opendata); |
1da177e4 LT |
483 | return status; |
484 | } | |
485 | ||
539cd03a | 486 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
487 | { |
488 | struct nfs_server *server = NFS_SERVER(state->inode); | |
489 | struct nfs4_exception exception = { }; | |
490 | int err; | |
491 | do { | |
539cd03a | 492 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
493 | if (err != -NFS4ERR_DELAY) |
494 | break; | |
495 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
496 | } while (exception.retry); |
497 | return err; | |
498 | } | |
499 | ||
864472e9 TM |
500 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
501 | { | |
502 | struct nfs_open_context *ctx; | |
503 | int ret; | |
504 | ||
505 | ctx = nfs4_state_find_open_context(state); | |
506 | if (IS_ERR(ctx)) | |
507 | return PTR_ERR(ctx); | |
539cd03a | 508 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
509 | put_nfs_open_context(ctx); |
510 | return ret; | |
511 | } | |
512 | ||
13437e12 | 513 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
514 | { |
515 | struct nfs4_state_owner *sp = state->owner; | |
e56e0b78 | 516 | struct nfs4_opendata *opendata; |
864472e9 | 517 | int ret; |
1da177e4 | 518 | |
ad389da7 | 519 | opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL); |
e56e0b78 | 520 | if (opendata == NULL) |
864472e9 | 521 | return -ENOMEM; |
e56e0b78 | 522 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 523 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 524 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 525 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 526 | nfs4_opendata_put(opendata); |
864472e9 | 527 | return ret; |
1da177e4 LT |
528 | } |
529 | ||
13437e12 | 530 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
531 | { |
532 | struct nfs4_exception exception = { }; | |
539cd03a | 533 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
534 | int err; |
535 | do { | |
13437e12 | 536 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
537 | switch (err) { |
538 | case 0: | |
539 | return err; | |
540 | case -NFS4ERR_STALE_CLIENTID: | |
541 | case -NFS4ERR_STALE_STATEID: | |
542 | case -NFS4ERR_EXPIRED: | |
543 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 544 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
545 | return err; |
546 | } | |
547 | err = nfs4_handle_exception(server, err, &exception); | |
548 | } while (exception.retry); | |
549 | return err; | |
550 | } | |
551 | ||
cdd4e68b | 552 | static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 553 | { |
cdd4e68b TM |
554 | struct nfs4_opendata *data = calldata; |
555 | struct rpc_message msg = { | |
556 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
557 | .rpc_argp = &data->c_arg, | |
558 | .rpc_resp = &data->c_res, | |
559 | .rpc_cred = data->owner->so_cred, | |
1da177e4 | 560 | }; |
26e976a8 | 561 | data->timestamp = jiffies; |
cdd4e68b TM |
562 | rpc_call_setup(task, &msg, 0); |
563 | } | |
564 | ||
565 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
566 | { | |
567 | struct nfs4_opendata *data = calldata; | |
568 | ||
569 | data->rpc_status = task->tk_status; | |
570 | if (RPC_ASSASSINATED(task)) | |
571 | return; | |
26e976a8 | 572 | if (data->rpc_status == 0) { |
cdd4e68b TM |
573 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
574 | sizeof(data->o_res.stateid.data)); | |
26e976a8 TM |
575 | renew_lease(data->o_res.server, data->timestamp); |
576 | } | |
cdd4e68b TM |
577 | nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); |
578 | nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); | |
579 | } | |
580 | ||
581 | static void nfs4_open_confirm_release(void *calldata) | |
582 | { | |
583 | struct nfs4_opendata *data = calldata; | |
584 | struct nfs4_state *state = NULL; | |
585 | ||
586 | /* If this request hasn't been cancelled, do nothing */ | |
587 | if (data->cancelled == 0) | |
588 | goto out_free; | |
589 | /* In case of error, no cleanup! */ | |
590 | if (data->rpc_status != 0) | |
591 | goto out_free; | |
592 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
593 | state = nfs4_opendata_to_nfs4_state(data); | |
594 | if (state != NULL) | |
4a35bd41 | 595 | nfs4_close_state(&data->path, state, data->o_arg.open_flags); |
cdd4e68b | 596 | out_free: |
c6d00e63 | 597 | nfs4_opendata_put(data); |
cdd4e68b TM |
598 | } |
599 | ||
600 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
601 | .rpc_call_prepare = nfs4_open_confirm_prepare, | |
602 | .rpc_call_done = nfs4_open_confirm_done, | |
603 | .rpc_release = nfs4_open_confirm_release, | |
604 | }; | |
605 | ||
606 | /* | |
607 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
608 | */ | |
609 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
610 | { | |
611 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
612 | struct rpc_task *task; | |
1da177e4 LT |
613 | int status; |
614 | ||
c6d00e63 | 615 | kref_get(&data->kref); |
7a1218a2 TM |
616 | /* |
617 | * If rpc_run_task() ends up calling ->rpc_release(), we | |
618 | * want to ensure that it takes the 'error' code path. | |
619 | */ | |
620 | data->rpc_status = -ENOMEM; | |
cdd4e68b | 621 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); |
7a1218a2 | 622 | if (IS_ERR(task)) |
cdd4e68b | 623 | return PTR_ERR(task); |
cdd4e68b TM |
624 | status = nfs4_wait_for_completion_rpc_task(task); |
625 | if (status != 0) { | |
626 | data->cancelled = 1; | |
627 | smp_wmb(); | |
628 | } else | |
629 | status = data->rpc_status; | |
e6b3c4db | 630 | rpc_put_task(task); |
1da177e4 LT |
631 | return status; |
632 | } | |
633 | ||
24ac23ab | 634 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 635 | { |
24ac23ab TM |
636 | struct nfs4_opendata *data = calldata; |
637 | struct nfs4_state_owner *sp = data->owner; | |
1da177e4 LT |
638 | struct rpc_message msg = { |
639 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
24ac23ab TM |
640 | .rpc_argp = &data->o_arg, |
641 | .rpc_resp = &data->o_res, | |
1da177e4 LT |
642 | .rpc_cred = sp->so_cred, |
643 | }; | |
24ac23ab TM |
644 | |
645 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
646 | return; | |
647 | /* Update sequence id. */ | |
9f958ab8 | 648 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 649 | data->o_arg.clientid = sp->so_client->cl_clientid; |
864472e9 TM |
650 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
651 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
26e976a8 | 652 | data->timestamp = jiffies; |
24ac23ab TM |
653 | rpc_call_setup(task, &msg, 0); |
654 | } | |
1da177e4 | 655 | |
24ac23ab TM |
656 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
657 | { | |
658 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 659 | |
24ac23ab TM |
660 | data->rpc_status = task->tk_status; |
661 | if (RPC_ASSASSINATED(task)) | |
662 | return; | |
663 | if (task->tk_status == 0) { | |
664 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
665 | case S_IFREG: |
666 | break; | |
667 | case S_IFLNK: | |
24ac23ab | 668 | data->rpc_status = -ELOOP; |
6f926b5b TM |
669 | break; |
670 | case S_IFDIR: | |
24ac23ab | 671 | data->rpc_status = -EISDIR; |
6f926b5b TM |
672 | break; |
673 | default: | |
24ac23ab | 674 | data->rpc_status = -ENOTDIR; |
6f926b5b | 675 | } |
26e976a8 | 676 | renew_lease(data->o_res.server, data->timestamp); |
6f926b5b | 677 | } |
24ac23ab TM |
678 | nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); |
679 | } | |
6f926b5b | 680 | |
24ac23ab TM |
681 | static void nfs4_open_release(void *calldata) |
682 | { | |
683 | struct nfs4_opendata *data = calldata; | |
684 | struct nfs4_state *state = NULL; | |
685 | ||
686 | /* If this request hasn't been cancelled, do nothing */ | |
687 | if (data->cancelled == 0) | |
688 | goto out_free; | |
689 | /* In case of error, no cleanup! */ | |
690 | if (data->rpc_status != 0) | |
691 | goto out_free; | |
692 | /* In case we need an open_confirm, no cleanup! */ | |
693 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
694 | goto out_free; | |
695 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
696 | state = nfs4_opendata_to_nfs4_state(data); | |
697 | if (state != NULL) | |
4a35bd41 | 698 | nfs4_close_state(&data->path, state, data->o_arg.open_flags); |
24ac23ab | 699 | out_free: |
c6d00e63 | 700 | nfs4_opendata_put(data); |
24ac23ab TM |
701 | } |
702 | ||
703 | static const struct rpc_call_ops nfs4_open_ops = { | |
704 | .rpc_call_prepare = nfs4_open_prepare, | |
705 | .rpc_call_done = nfs4_open_done, | |
706 | .rpc_release = nfs4_open_release, | |
707 | }; | |
708 | ||
709 | /* | |
710 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
711 | */ | |
712 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
713 | { | |
714 | struct inode *dir = data->dir->d_inode; | |
715 | struct nfs_server *server = NFS_SERVER(dir); | |
716 | struct nfs_openargs *o_arg = &data->o_arg; | |
717 | struct nfs_openres *o_res = &data->o_res; | |
718 | struct rpc_task *task; | |
719 | int status; | |
720 | ||
c6d00e63 | 721 | kref_get(&data->kref); |
7a1218a2 TM |
722 | /* |
723 | * If rpc_run_task() ends up calling ->rpc_release(), we | |
724 | * want to ensure that it takes the 'error' code path. | |
725 | */ | |
726 | data->rpc_status = -ENOMEM; | |
2ced46c2 | 727 | data->cancelled = 0; |
24ac23ab | 728 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); |
7a1218a2 | 729 | if (IS_ERR(task)) |
24ac23ab | 730 | return PTR_ERR(task); |
24ac23ab TM |
731 | status = nfs4_wait_for_completion_rpc_task(task); |
732 | if (status != 0) { | |
733 | data->cancelled = 1; | |
734 | smp_wmb(); | |
735 | } else | |
736 | status = data->rpc_status; | |
e6b3c4db | 737 | rpc_put_task(task); |
1da177e4 | 738 | if (status != 0) |
24ac23ab TM |
739 | return status; |
740 | ||
56ae19f3 TM |
741 | if (o_arg->open_flags & O_CREAT) { |
742 | update_changeattr(dir, &o_res->cinfo); | |
743 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
744 | } else | |
745 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 746 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 747 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 748 | if (status != 0) |
24ac23ab | 749 | return status; |
1da177e4 | 750 | } |
24ac23ab | 751 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
1da177e4 | 752 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
8fa5c000 | 753 | return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 754 | return 0; |
1da177e4 LT |
755 | } |
756 | ||
757 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
758 | { | |
759 | struct nfs_access_entry cache; | |
760 | int mask = 0; | |
761 | int status; | |
762 | ||
763 | if (openflags & FMODE_READ) | |
764 | mask |= MAY_READ; | |
765 | if (openflags & FMODE_WRITE) | |
766 | mask |= MAY_WRITE; | |
1b45c46c TM |
767 | if (openflags & FMODE_EXEC) |
768 | mask |= MAY_EXEC; | |
1da177e4 LT |
769 | status = nfs_access_get_cached(inode, cred, &cache); |
770 | if (status == 0) | |
771 | goto out; | |
772 | ||
773 | /* Be clever: ask server to check for all possible rights */ | |
774 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
775 | cache.cred = cred; | |
776 | cache.jiffies = jiffies; | |
777 | status = _nfs4_proc_access(inode, &cache); | |
778 | if (status != 0) | |
779 | return status; | |
780 | nfs_access_add_cache(inode, &cache); | |
781 | out: | |
782 | if ((cache.mask & mask) == mask) | |
783 | return 0; | |
784 | return -EACCES; | |
785 | } | |
786 | ||
10afec90 | 787 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 788 | { |
7539bbab | 789 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 790 | int ret; |
58d9714a | 791 | |
6b30954e TM |
792 | for (;;) { |
793 | ret = nfs4_wait_clnt_recover(server->client, clp); | |
794 | if (ret != 0) | |
795 | return ret; | |
796 | if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
797 | break; | |
58d9714a | 798 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
799 | } |
800 | return 0; | |
58d9714a TM |
801 | } |
802 | ||
1da177e4 LT |
803 | /* |
804 | * OPEN_EXPIRED: | |
805 | * reclaim state on the server after a network partition. | |
806 | * Assumes caller holds the appropriate lock | |
807 | */ | |
539cd03a | 808 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 809 | { |
1da177e4 | 810 | struct inode *inode = state->inode; |
1da177e4 | 811 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
e56e0b78 | 812 | struct nfs4_opendata *opendata; |
24ac23ab | 813 | int openflags = state->state & (FMODE_READ|FMODE_WRITE); |
864472e9 | 814 | int ret; |
1da177e4 LT |
815 | |
816 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
539cd03a | 817 | ret = _nfs4_do_access(inode, ctx->cred, openflags); |
864472e9 TM |
818 | if (ret < 0) |
819 | return ret; | |
1da177e4 LT |
820 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
821 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
864472e9 | 822 | return 0; |
1da177e4 | 823 | } |
ad389da7 | 824 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL); |
e56e0b78 | 825 | if (opendata == NULL) |
864472e9 TM |
826 | return -ENOMEM; |
827 | ret = nfs4_open_recover(opendata, state); | |
828 | if (ret == -ESTALE) { | |
829 | /* Invalidate the state owner so we don't ever use it again */ | |
539cd03a TM |
830 | nfs4_drop_state_owner(state->owner); |
831 | d_drop(ctx->path.dentry); | |
1da177e4 | 832 | } |
c6d00e63 | 833 | nfs4_opendata_put(opendata); |
864472e9 | 834 | return ret; |
1da177e4 LT |
835 | } |
836 | ||
539cd03a | 837 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 838 | { |
539cd03a | 839 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
840 | struct nfs4_exception exception = { }; |
841 | int err; | |
842 | ||
843 | do { | |
539cd03a | 844 | err = _nfs4_open_expired(ctx, state); |
202b50dc TM |
845 | if (err == -NFS4ERR_DELAY) |
846 | nfs4_handle_exception(server, err, &exception); | |
847 | } while (exception.retry); | |
848 | return err; | |
849 | } | |
850 | ||
1da177e4 LT |
851 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
852 | { | |
1da177e4 | 853 | struct nfs_open_context *ctx; |
864472e9 | 854 | int ret; |
1da177e4 | 855 | |
864472e9 TM |
856 | ctx = nfs4_state_find_open_context(state); |
857 | if (IS_ERR(ctx)) | |
858 | return PTR_ERR(ctx); | |
539cd03a | 859 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
860 | put_nfs_open_context(ctx); |
861 | return ret; | |
1da177e4 LT |
862 | } |
863 | ||
864 | /* | |
24ac23ab | 865 | * Returns a referenced nfs4_state if there is an open delegation on the file |
1da177e4 LT |
866 | */ |
867 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
868 | { | |
869 | struct nfs_delegation *delegation; | |
870 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 871 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
872 | struct nfs_inode *nfsi = NFS_I(inode); |
873 | struct nfs4_state_owner *sp = NULL; | |
874 | struct nfs4_state *state = NULL; | |
875 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
876 | int err; | |
877 | ||
b4454fe1 TM |
878 | err = -ENOMEM; |
879 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
880 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
881 | return err; | |
882 | } | |
58d9714a TM |
883 | err = nfs4_recover_expired_lease(server); |
884 | if (err != 0) | |
b4454fe1 | 885 | goto out_put_state_owner; |
1da177e4 LT |
886 | /* Protect against reboot recovery - NOTE ORDER! */ |
887 | down_read(&clp->cl_sem); | |
888 | /* Protect against delegation recall */ | |
889 | down_read(&nfsi->rwsem); | |
890 | delegation = NFS_I(inode)->delegation; | |
891 | err = -ENOENT; | |
892 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
893 | goto out_err; | |
894 | err = -ENOMEM; | |
1da177e4 LT |
895 | state = nfs4_get_open_state(inode, sp); |
896 | if (state == NULL) | |
897 | goto out_err; | |
898 | ||
899 | err = -ENOENT; | |
900 | if ((state->state & open_flags) == open_flags) { | |
901 | spin_lock(&inode->i_lock); | |
e7616923 | 902 | update_open_stateflags(state, open_flags); |
1da177e4 LT |
903 | spin_unlock(&inode->i_lock); |
904 | goto out_ok; | |
905 | } else if (state->state != 0) | |
b4454fe1 | 906 | goto out_put_open_state; |
1da177e4 LT |
907 | |
908 | lock_kernel(); | |
909 | err = _nfs4_do_access(inode, cred, open_flags); | |
910 | unlock_kernel(); | |
911 | if (err != 0) | |
b4454fe1 | 912 | goto out_put_open_state; |
1da177e4 LT |
913 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
914 | update_open_stateid(state, &delegation->stateid, open_flags); | |
915 | out_ok: | |
1da177e4 LT |
916 | nfs4_put_state_owner(sp); |
917 | up_read(&nfsi->rwsem); | |
918 | up_read(&clp->cl_sem); | |
1da177e4 | 919 | *res = state; |
b4454fe1 TM |
920 | return 0; |
921 | out_put_open_state: | |
922 | nfs4_put_open_state(state); | |
1da177e4 | 923 | out_err: |
1da177e4 LT |
924 | up_read(&nfsi->rwsem); |
925 | up_read(&clp->cl_sem); | |
b8e5c4c2 TM |
926 | if (err != -EACCES) |
927 | nfs_inode_return_delegation(inode); | |
b4454fe1 TM |
928 | out_put_state_owner: |
929 | nfs4_put_state_owner(sp); | |
1da177e4 LT |
930 | return err; |
931 | } | |
932 | ||
933 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
934 | { | |
935 | struct nfs4_exception exception = { }; | |
a162a6b8 | 936 | struct nfs4_state *res = ERR_PTR(-EIO); |
1da177e4 LT |
937 | int err; |
938 | ||
939 | do { | |
940 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
941 | if (err == 0) | |
942 | break; | |
943 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
944 | err, &exception)); | |
945 | } while (exception.retry); | |
946 | return res; | |
947 | } | |
948 | ||
aa53ed54 JL |
949 | /* |
950 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
951 | * fields corresponding to attributes that were used to store the verifier. | |
952 | * Make sure we clobber those fields in the later setattr call | |
953 | */ | |
954 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
955 | { | |
956 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
957 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
958 | sattr->ia_valid |= ATTR_ATIME; | |
959 | ||
960 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
961 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
962 | sattr->ia_valid |= ATTR_MTIME; | |
963 | } | |
964 | ||
1da177e4 | 965 | /* |
24ac23ab | 966 | * Returns a referenced nfs4_state |
1da177e4 | 967 | */ |
ad389da7 | 968 | 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 |
969 | { |
970 | struct nfs4_state_owner *sp; | |
971 | struct nfs4_state *state = NULL; | |
972 | struct nfs_server *server = NFS_SERVER(dir); | |
7539bbab | 973 | struct nfs_client *clp = server->nfs_client; |
e56e0b78 | 974 | struct nfs4_opendata *opendata; |
1da177e4 | 975 | int status; |
1da177e4 LT |
976 | |
977 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
978 | status = -ENOMEM; |
979 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
980 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
981 | goto out_err; | |
982 | } | |
58d9714a TM |
983 | status = nfs4_recover_expired_lease(server); |
984 | if (status != 0) | |
b4454fe1 | 985 | goto err_put_state_owner; |
58d9714a TM |
986 | down_read(&clp->cl_sem); |
987 | status = -ENOMEM; | |
ad389da7 | 988 | opendata = nfs4_opendata_alloc(path, sp, flags, sattr); |
e56e0b78 | 989 | if (opendata == NULL) |
76723de0 | 990 | goto err_release_rwsem; |
1da177e4 | 991 | |
24ac23ab | 992 | status = _nfs4_proc_open(opendata); |
1da177e4 | 993 | if (status != 0) |
c6d00e63 | 994 | goto err_opendata_put; |
1da177e4 | 995 | |
aa53ed54 JL |
996 | if (opendata->o_arg.open_flags & O_EXCL) |
997 | nfs4_exclusive_attrset(opendata, sattr); | |
998 | ||
1da177e4 | 999 | status = -ENOMEM; |
24ac23ab TM |
1000 | state = nfs4_opendata_to_nfs4_state(opendata); |
1001 | if (state == NULL) | |
c6d00e63 | 1002 | goto err_opendata_put; |
c6d00e63 | 1003 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1004 | nfs4_put_state_owner(sp); |
1005 | up_read(&clp->cl_sem); | |
1006 | *res = state; | |
1007 | return 0; | |
c6d00e63 TM |
1008 | err_opendata_put: |
1009 | nfs4_opendata_put(opendata); | |
76723de0 TM |
1010 | err_release_rwsem: |
1011 | up_read(&clp->cl_sem); | |
e56e0b78 TM |
1012 | err_put_state_owner: |
1013 | nfs4_put_state_owner(sp); | |
1da177e4 | 1014 | out_err: |
1da177e4 LT |
1015 | *res = NULL; |
1016 | return status; | |
1017 | } | |
1018 | ||
1019 | ||
ad389da7 | 1020 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred) |
1da177e4 LT |
1021 | { |
1022 | struct nfs4_exception exception = { }; | |
1023 | struct nfs4_state *res; | |
1024 | int status; | |
1025 | ||
1026 | do { | |
ad389da7 | 1027 | status = _nfs4_do_open(dir, path, flags, sattr, cred, &res); |
1da177e4 LT |
1028 | if (status == 0) |
1029 | break; | |
1030 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1031 | * book-keeping w.r.t. state-changing operations | |
1032 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1033 | * It is actually a sign of a bug on the client or on the server. | |
1034 | * | |
1035 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1036 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1037 | * have unhashed the old state_owner for us, and that we can |
1038 | * therefore safely retry using a new one. We should still warn | |
1039 | * the user though... | |
1040 | */ | |
1041 | if (status == -NFS4ERR_BAD_SEQID) { | |
1042 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
1043 | exception.retry = 1; | |
1044 | continue; | |
1045 | } | |
550f5747 TM |
1046 | /* |
1047 | * BAD_STATEID on OPEN means that the server cancelled our | |
1048 | * state before it received the OPEN_CONFIRM. | |
1049 | * Recover by retrying the request as per the discussion | |
1050 | * on Page 181 of RFC3530. | |
1051 | */ | |
1052 | if (status == -NFS4ERR_BAD_STATEID) { | |
1053 | exception.retry = 1; | |
1054 | continue; | |
1055 | } | |
1da177e4 LT |
1056 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1057 | status, &exception)); | |
1058 | } while (exception.retry); | |
1059 | return res; | |
1060 | } | |
1061 | ||
3e4f6290 TM |
1062 | static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, |
1063 | struct iattr *sattr, struct nfs4_state *state) | |
1da177e4 | 1064 | { |
3e4f6290 | 1065 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1066 | struct nfs_setattrargs arg = { |
3e4f6290 | 1067 | .fh = NFS_FH(inode), |
1da177e4 LT |
1068 | .iap = sattr, |
1069 | .server = server, | |
1070 | .bitmask = server->attr_bitmask, | |
1071 | }; | |
1072 | struct nfs_setattrres res = { | |
1073 | .fattr = fattr, | |
1074 | .server = server, | |
1075 | }; | |
1076 | struct rpc_message msg = { | |
1077 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1078 | .rpc_argp = &arg, | |
1079 | .rpc_resp = &res, | |
1080 | }; | |
26e976a8 | 1081 | unsigned long timestamp = jiffies; |
65e4308d | 1082 | int status; |
1da177e4 | 1083 | |
0e574af1 | 1084 | nfs_fattr_init(fattr); |
1da177e4 | 1085 | |
3e4f6290 TM |
1086 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1087 | /* Use that stateid */ | |
1088 | } else if (state != NULL) { | |
1da177e4 | 1089 | msg.rpc_cred = state->owner->so_cred; |
08e9eac4 TM |
1090 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1091 | } else | |
1da177e4 LT |
1092 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1093 | ||
65e4308d | 1094 | status = rpc_call_sync(server->client, &msg, 0); |
26e976a8 TM |
1095 | if (status == 0 && state != NULL) |
1096 | renew_lease(server, timestamp); | |
65e4308d | 1097 | return status; |
1da177e4 LT |
1098 | } |
1099 | ||
3e4f6290 TM |
1100 | static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, |
1101 | struct iattr *sattr, struct nfs4_state *state) | |
1da177e4 | 1102 | { |
3e4f6290 | 1103 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1104 | struct nfs4_exception exception = { }; |
1105 | int err; | |
1106 | do { | |
1107 | err = nfs4_handle_exception(server, | |
3e4f6290 | 1108 | _nfs4_do_setattr(inode, fattr, sattr, state), |
1da177e4 LT |
1109 | &exception); |
1110 | } while (exception.retry); | |
1111 | return err; | |
1112 | } | |
1113 | ||
1114 | struct nfs4_closedata { | |
4a35bd41 | 1115 | struct path path; |
1da177e4 LT |
1116 | struct inode *inode; |
1117 | struct nfs4_state *state; | |
1118 | struct nfs_closeargs arg; | |
1119 | struct nfs_closeres res; | |
516a6af6 | 1120 | struct nfs_fattr fattr; |
26e976a8 | 1121 | unsigned long timestamp; |
1da177e4 LT |
1122 | }; |
1123 | ||
963d8fe5 | 1124 | static void nfs4_free_closedata(void *data) |
9512135d | 1125 | { |
963d8fe5 TM |
1126 | struct nfs4_closedata *calldata = data; |
1127 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1128 | |
1129 | nfs4_put_open_state(calldata->state); | |
1130 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1131 | nfs4_put_state_owner(sp); |
4a35bd41 TM |
1132 | dput(calldata->path.dentry); |
1133 | mntput(calldata->path.mnt); | |
9512135d TM |
1134 | kfree(calldata); |
1135 | } | |
1136 | ||
963d8fe5 | 1137 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1138 | { |
963d8fe5 | 1139 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1140 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1141 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1142 | ||
4ce70ada TM |
1143 | if (RPC_ASSASSINATED(task)) |
1144 | return; | |
1da177e4 LT |
1145 | /* hmm. we are done with the inode, and in the process of freeing |
1146 | * the state_owner. we keep this around to process errors | |
1147 | */ | |
cee54fc9 | 1148 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
1da177e4 LT |
1149 | switch (task->tk_status) { |
1150 | case 0: | |
1151 | memcpy(&state->stateid, &calldata->res.stateid, | |
1152 | sizeof(state->stateid)); | |
26e976a8 | 1153 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1154 | break; |
1155 | case -NFS4ERR_STALE_STATEID: | |
1156 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
1157 | break; |
1158 | default: | |
1159 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
1160 | rpc_restart_call(task); | |
1161 | return; | |
1162 | } | |
1163 | } | |
516a6af6 | 1164 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1165 | } |
1166 | ||
4ce70ada | 1167 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1168 | { |
4ce70ada | 1169 | struct nfs4_closedata *calldata = data; |
9512135d | 1170 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1171 | struct rpc_message msg = { |
1172 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1173 | .rpc_argp = &calldata->arg, | |
1174 | .rpc_resp = &calldata->res, | |
9512135d | 1175 | .rpc_cred = state->owner->so_cred, |
1da177e4 | 1176 | }; |
4cecb76f | 1177 | int mode = 0, old_mode; |
9512135d | 1178 | |
963d8fe5 | 1179 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1180 | return; |
9512135d TM |
1181 | /* Recalculate the new open mode in case someone reopened the file |
1182 | * while we were waiting in line to be scheduled. | |
1183 | */ | |
4cecb76f TM |
1184 | spin_lock(&state->owner->so_lock); |
1185 | spin_lock(&calldata->inode->i_lock); | |
1186 | mode = old_mode = state->state; | |
e7616923 TM |
1187 | if (state->n_rdwr == 0) { |
1188 | if (state->n_rdonly == 0) | |
1189 | mode &= ~FMODE_READ; | |
1190 | if (state->n_wronly == 0) | |
1191 | mode &= ~FMODE_WRITE; | |
1192 | } | |
4cecb76f TM |
1193 | nfs4_state_set_mode_locked(state, mode); |
1194 | spin_unlock(&calldata->inode->i_lock); | |
1195 | spin_unlock(&state->owner->so_lock); | |
1196 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
963d8fe5 TM |
1197 | /* Note: exit _without_ calling nfs4_close_done */ |
1198 | task->tk_action = NULL; | |
9512135d TM |
1199 | return; |
1200 | } | |
516a6af6 | 1201 | nfs_fattr_init(calldata->res.fattr); |
9512135d | 1202 | if (mode != 0) |
1da177e4 | 1203 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
9512135d | 1204 | calldata->arg.open_flags = mode; |
26e976a8 | 1205 | calldata->timestamp = jiffies; |
9512135d | 1206 | rpc_call_setup(task, &msg, 0); |
1da177e4 LT |
1207 | } |
1208 | ||
963d8fe5 | 1209 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1210 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1211 | .rpc_call_done = nfs4_close_done, |
1212 | .rpc_release = nfs4_free_closedata, | |
1213 | }; | |
1214 | ||
1da177e4 LT |
1215 | /* |
1216 | * It is possible for data to be read/written from a mem-mapped file | |
1217 | * after the sys_close call (which hits the vfs layer as a flush). | |
1218 | * This means that we can't safely call nfsv4 close on a file until | |
1219 | * the inode is cleared. This in turn means that we are not good | |
1220 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1221 | * share state even when we are done with one of the three share | |
1222 | * stateid's in the inode. | |
1223 | * | |
1224 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1225 | */ | |
4a35bd41 | 1226 | int nfs4_do_close(struct path *path, struct nfs4_state *state) |
1da177e4 | 1227 | { |
4a35bd41 | 1228 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1229 | struct nfs4_closedata *calldata; |
b39e625b TM |
1230 | struct nfs4_state_owner *sp = state->owner; |
1231 | struct rpc_task *task; | |
9512135d | 1232 | int status = -ENOMEM; |
1da177e4 | 1233 | |
9512135d | 1234 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1235 | if (calldata == NULL) |
9512135d | 1236 | goto out; |
4a35bd41 | 1237 | calldata->inode = state->inode; |
1da177e4 | 1238 | calldata->state = state; |
4a35bd41 | 1239 | calldata->arg.fh = NFS_FH(state->inode); |
9512135d | 1240 | calldata->arg.stateid = &state->stateid; |
1da177e4 | 1241 | /* Serialization for the sequence id */ |
cee54fc9 | 1242 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1243 | if (calldata->arg.seqid == NULL) |
1244 | goto out_free_calldata; | |
516a6af6 TM |
1245 | calldata->arg.bitmask = server->attr_bitmask; |
1246 | calldata->res.fattr = &calldata->fattr; | |
1247 | calldata->res.server = server; | |
4a35bd41 TM |
1248 | calldata->path.mnt = mntget(path->mnt); |
1249 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1250 | |
b39e625b TM |
1251 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata); |
1252 | if (IS_ERR(task)) | |
1253 | return PTR_ERR(task); | |
1254 | rpc_put_task(task); | |
1255 | return 0; | |
9512135d TM |
1256 | out_free_calldata: |
1257 | kfree(calldata); | |
1258 | out: | |
b39e625b TM |
1259 | nfs4_put_open_state(state); |
1260 | nfs4_put_state_owner(sp); | |
9512135d | 1261 | return status; |
1da177e4 LT |
1262 | } |
1263 | ||
4a35bd41 | 1264 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state) |
02a913a7 TM |
1265 | { |
1266 | struct file *filp; | |
1b45c46c | 1267 | int ret; |
02a913a7 | 1268 | |
1b45c46c TM |
1269 | /* If the open_intent is for execute, we have an extra check to make */ |
1270 | if (nd->intent.open.flags & FMODE_EXEC) { | |
1271 | ret = _nfs4_do_access(state->inode, | |
1272 | state->owner->so_cred, | |
1273 | nd->intent.open.flags); | |
1274 | if (ret < 0) | |
1275 | goto out_close; | |
1276 | } | |
4a35bd41 | 1277 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1278 | if (!IS_ERR(filp)) { |
1279 | struct nfs_open_context *ctx; | |
1280 | ctx = (struct nfs_open_context *)filp->private_data; | |
1281 | ctx->state = state; | |
95cf959b TM |
1282 | return 0; |
1283 | } | |
1b45c46c TM |
1284 | ret = PTR_ERR(filp); |
1285 | out_close: | |
4a35bd41 | 1286 | nfs4_close_state(path, state, nd->intent.open.flags); |
1b45c46c | 1287 | return ret; |
02a913a7 TM |
1288 | } |
1289 | ||
1290 | struct dentry * | |
1da177e4 LT |
1291 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1292 | { | |
ad389da7 TM |
1293 | struct path path = { |
1294 | .mnt = nd->mnt, | |
1295 | .dentry = dentry, | |
1296 | }; | |
1da177e4 LT |
1297 | struct iattr attr; |
1298 | struct rpc_cred *cred; | |
1299 | struct nfs4_state *state; | |
02a913a7 | 1300 | struct dentry *res; |
1da177e4 LT |
1301 | |
1302 | if (nd->flags & LOOKUP_CREATE) { | |
1303 | attr.ia_mode = nd->intent.open.create_mode; | |
1304 | attr.ia_valid = ATTR_MODE; | |
1305 | if (!IS_POSIXACL(dir)) | |
1306 | attr.ia_mode &= ~current->fs->umask; | |
1307 | } else { | |
1308 | attr.ia_valid = 0; | |
1309 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1310 | } | |
1311 | ||
1f163415 | 1312 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
1da177e4 | 1313 | if (IS_ERR(cred)) |
02a913a7 | 1314 | return (struct dentry *)cred; |
ad389da7 | 1315 | state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1316 | put_rpccred(cred); |
02a913a7 TM |
1317 | if (IS_ERR(state)) { |
1318 | if (PTR_ERR(state) == -ENOENT) | |
1319 | d_add(dentry, NULL); | |
1320 | return (struct dentry *)state; | |
1321 | } | |
24ac23ab | 1322 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 TM |
1323 | if (res != NULL) |
1324 | dentry = res; | |
4a35bd41 | 1325 | nfs4_intent_set_file(nd, &path, state); |
02a913a7 | 1326 | return res; |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | int | |
02a913a7 | 1330 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1331 | { |
ad389da7 TM |
1332 | struct path path = { |
1333 | .mnt = nd->mnt, | |
1334 | .dentry = dentry, | |
1335 | }; | |
1da177e4 LT |
1336 | struct rpc_cred *cred; |
1337 | struct nfs4_state *state; | |
1da177e4 | 1338 | |
1f163415 | 1339 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
1da177e4 LT |
1340 | if (IS_ERR(cred)) |
1341 | return PTR_ERR(cred); | |
1342 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
1343 | if (IS_ERR(state)) | |
ad389da7 | 1344 | state = nfs4_do_open(dir, &path, openflags, NULL, cred); |
1da177e4 | 1345 | put_rpccred(cred); |
02a913a7 TM |
1346 | if (IS_ERR(state)) { |
1347 | switch (PTR_ERR(state)) { | |
1348 | case -EPERM: | |
1349 | case -EACCES: | |
1350 | case -EDQUOT: | |
1351 | case -ENOSPC: | |
1352 | case -EROFS: | |
1353 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1354 | return 1; | |
b87c0adf CL |
1355 | default: |
1356 | goto out_drop; | |
02a913a7 | 1357 | } |
02a913a7 | 1358 | } |
24ac23ab | 1359 | if (state->inode == dentry->d_inode) { |
4a35bd41 | 1360 | nfs4_intent_set_file(nd, &path, state); |
1da177e4 LT |
1361 | return 1; |
1362 | } | |
4a35bd41 | 1363 | nfs4_close_state(&path, state, openflags); |
02a913a7 TM |
1364 | out_drop: |
1365 | d_drop(dentry); | |
1da177e4 LT |
1366 | return 0; |
1367 | } | |
1368 | ||
1369 | ||
1370 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1371 | { | |
1372 | struct nfs4_server_caps_res res = {}; | |
1373 | struct rpc_message msg = { | |
1374 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1375 | .rpc_argp = fhandle, | |
1376 | .rpc_resp = &res, | |
1377 | }; | |
1378 | int status; | |
1379 | ||
1380 | status = rpc_call_sync(server->client, &msg, 0); | |
1381 | if (status == 0) { | |
1382 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1383 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1384 | server->caps |= NFS_CAP_ACLS; | |
1385 | if (res.has_links != 0) | |
1386 | server->caps |= NFS_CAP_HARDLINKS; | |
1387 | if (res.has_symlinks != 0) | |
1388 | server->caps |= NFS_CAP_SYMLINKS; | |
1389 | server->acl_bitmask = res.acl_bitmask; | |
1390 | } | |
1391 | return status; | |
1392 | } | |
1393 | ||
55a97593 | 1394 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1395 | { |
1396 | struct nfs4_exception exception = { }; | |
1397 | int err; | |
1398 | do { | |
1399 | err = nfs4_handle_exception(server, | |
1400 | _nfs4_server_capabilities(server, fhandle), | |
1401 | &exception); | |
1402 | } while (exception.retry); | |
1403 | return err; | |
1404 | } | |
1405 | ||
1406 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1407 | struct nfs_fsinfo *info) | |
1408 | { | |
1da177e4 LT |
1409 | struct nfs4_lookup_root_arg args = { |
1410 | .bitmask = nfs4_fattr_bitmap, | |
1411 | }; | |
1412 | struct nfs4_lookup_res res = { | |
1413 | .server = server, | |
0e574af1 | 1414 | .fattr = info->fattr, |
1da177e4 LT |
1415 | .fh = fhandle, |
1416 | }; | |
1417 | struct rpc_message msg = { | |
1418 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1419 | .rpc_argp = &args, | |
1420 | .rpc_resp = &res, | |
1421 | }; | |
0e574af1 | 1422 | nfs_fattr_init(info->fattr); |
1da177e4 LT |
1423 | return rpc_call_sync(server->client, &msg, 0); |
1424 | } | |
1425 | ||
1426 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1427 | struct nfs_fsinfo *info) | |
1428 | { | |
1429 | struct nfs4_exception exception = { }; | |
1430 | int err; | |
1431 | do { | |
1432 | err = nfs4_handle_exception(server, | |
1433 | _nfs4_lookup_root(server, fhandle, info), | |
1434 | &exception); | |
1435 | } while (exception.retry); | |
1436 | return err; | |
1437 | } | |
1438 | ||
54ceac45 DH |
1439 | /* |
1440 | * get the file handle for the "/" directory on the server | |
1441 | */ | |
1da177e4 | 1442 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1443 | struct nfs_fsinfo *info) |
1da177e4 | 1444 | { |
1da177e4 LT |
1445 | int status; |
1446 | ||
1da177e4 | 1447 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
1448 | if (status == 0) |
1449 | status = nfs4_server_capabilities(server, fhandle); | |
1450 | if (status == 0) | |
1451 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 1452 | return nfs4_map_errors(status); |
1da177e4 LT |
1453 | } |
1454 | ||
6b97fd3d MN |
1455 | /* |
1456 | * Get locations and (maybe) other attributes of a referral. | |
1457 | * Note that we'll actually follow the referral later when | |
1458 | * we detect fsid mismatch in inode revalidation | |
1459 | */ | |
1460 | static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) | |
1461 | { | |
1462 | int status = -ENOMEM; | |
1463 | struct page *page = NULL; | |
1464 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
1465 | |
1466 | page = alloc_page(GFP_KERNEL); | |
1467 | if (page == NULL) | |
1468 | goto out; | |
1469 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1470 | if (locations == NULL) | |
1471 | goto out; | |
1472 | ||
c228fd3a | 1473 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
1474 | if (status != 0) |
1475 | goto out; | |
1476 | /* Make sure server returned a different fsid for the referral */ | |
1477 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
1478 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name); | |
1479 | status = -EIO; | |
1480 | goto out; | |
1481 | } | |
1482 | ||
1483 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1484 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1485 | if (!fattr->mode) | |
1486 | fattr->mode = S_IFDIR; | |
1487 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1488 | out: | |
1489 | if (page) | |
1490 | __free_page(page); | |
1491 | if (locations) | |
1492 | kfree(locations); | |
1493 | return status; | |
1494 | } | |
1495 | ||
1da177e4 LT |
1496 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1497 | { | |
1498 | struct nfs4_getattr_arg args = { | |
1499 | .fh = fhandle, | |
1500 | .bitmask = server->attr_bitmask, | |
1501 | }; | |
1502 | struct nfs4_getattr_res res = { | |
1503 | .fattr = fattr, | |
1504 | .server = server, | |
1505 | }; | |
1506 | struct rpc_message msg = { | |
1507 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1508 | .rpc_argp = &args, | |
1509 | .rpc_resp = &res, | |
1510 | }; | |
1511 | ||
0e574af1 | 1512 | nfs_fattr_init(fattr); |
1da177e4 LT |
1513 | return rpc_call_sync(server->client, &msg, 0); |
1514 | } | |
1515 | ||
1516 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1517 | { | |
1518 | struct nfs4_exception exception = { }; | |
1519 | int err; | |
1520 | do { | |
1521 | err = nfs4_handle_exception(server, | |
1522 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1523 | &exception); | |
1524 | } while (exception.retry); | |
1525 | return err; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * The file is not closed if it is opened due to the a request to change | |
1530 | * the size of the file. The open call will not be needed once the | |
1531 | * VFS layer lookup-intents are implemented. | |
1532 | * | |
1533 | * Close is called when the inode is destroyed. | |
1534 | * If we haven't opened the file for O_WRONLY, we | |
1535 | * need to in the size_change case to obtain a stateid. | |
1536 | * | |
1537 | * Got race? | |
1538 | * Because OPEN is always done by name in nfsv4, it is | |
1539 | * possible that we opened a different file by the same | |
1540 | * name. We can recognize this race condition, but we | |
1541 | * can't do anything about it besides returning an error. | |
1542 | * | |
1543 | * This will be fixed with VFS changes (lookup-intent). | |
1544 | */ | |
1545 | static int | |
1546 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1547 | struct iattr *sattr) | |
1548 | { | |
08e9eac4 TM |
1549 | struct rpc_cred *cred; |
1550 | struct inode *inode = dentry->d_inode; | |
d530838b TM |
1551 | struct nfs_open_context *ctx; |
1552 | struct nfs4_state *state = NULL; | |
1da177e4 LT |
1553 | int status; |
1554 | ||
0e574af1 | 1555 | nfs_fattr_init(fattr); |
1da177e4 | 1556 | |
1f163415 | 1557 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
08e9eac4 TM |
1558 | if (IS_ERR(cred)) |
1559 | return PTR_ERR(cred); | |
d530838b TM |
1560 | |
1561 | /* Search for an existing open(O_WRITE) file */ | |
1562 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); | |
1563 | if (ctx != NULL) | |
1564 | state = ctx->state; | |
08e9eac4 | 1565 | |
3e4f6290 | 1566 | status = nfs4_do_setattr(inode, fattr, sattr, state); |
65e4308d TM |
1567 | if (status == 0) |
1568 | nfs_setattr_update_inode(inode, sattr); | |
d530838b TM |
1569 | if (ctx != NULL) |
1570 | put_nfs_open_context(ctx); | |
08e9eac4 | 1571 | put_rpccred(cred); |
1da177e4 LT |
1572 | return status; |
1573 | } | |
1574 | ||
2b3de441 DH |
1575 | static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, |
1576 | struct qstr *name, struct nfs_fh *fhandle, | |
1577 | struct nfs_fattr *fattr) | |
1578 | { | |
1579 | int status; | |
1580 | struct nfs4_lookup_arg args = { | |
1581 | .bitmask = server->attr_bitmask, | |
1582 | .dir_fh = dirfh, | |
1583 | .name = name, | |
1584 | }; | |
1585 | struct nfs4_lookup_res res = { | |
1586 | .server = server, | |
1587 | .fattr = fattr, | |
1588 | .fh = fhandle, | |
1589 | }; | |
1590 | struct rpc_message msg = { | |
1591 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1592 | .rpc_argp = &args, | |
1593 | .rpc_resp = &res, | |
1594 | }; | |
1595 | ||
1596 | nfs_fattr_init(fattr); | |
1597 | ||
1598 | dprintk("NFS call lookupfh %s\n", name->name); | |
1599 | status = rpc_call_sync(server->client, &msg, 0); | |
1600 | dprintk("NFS reply lookupfh: %d\n", status); | |
2b3de441 DH |
1601 | return status; |
1602 | } | |
1603 | ||
1604 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
1605 | struct qstr *name, struct nfs_fh *fhandle, | |
1606 | struct nfs_fattr *fattr) | |
1607 | { | |
1608 | struct nfs4_exception exception = { }; | |
1609 | int err; | |
1610 | do { | |
4e56e082 TM |
1611 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
1612 | /* FIXME: !!!! */ | |
1613 | if (err == -NFS4ERR_MOVED) { | |
1614 | err = -EREMOTE; | |
1615 | break; | |
1616 | } | |
1617 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
1618 | } while (exception.retry); |
1619 | return err; | |
1620 | } | |
1621 | ||
1da177e4 LT |
1622 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
1623 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1624 | { | |
4e56e082 | 1625 | int status; |
1da177e4 LT |
1626 | |
1627 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 1628 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
1629 | if (status == -NFS4ERR_MOVED) |
1630 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
1631 | dprintk("NFS reply lookup: %d\n", status); |
1632 | return status; | |
1633 | } | |
1634 | ||
1635 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1636 | { | |
1637 | struct nfs4_exception exception = { }; | |
1638 | int err; | |
1639 | do { | |
1640 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1641 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1642 | &exception); | |
1643 | } while (exception.retry); | |
1644 | return err; | |
1645 | } | |
1646 | ||
1647 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1648 | { | |
1649 | struct nfs4_accessargs args = { | |
1650 | .fh = NFS_FH(inode), | |
1651 | }; | |
1652 | struct nfs4_accessres res = { 0 }; | |
1653 | struct rpc_message msg = { | |
1654 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1655 | .rpc_argp = &args, | |
1656 | .rpc_resp = &res, | |
1657 | .rpc_cred = entry->cred, | |
1658 | }; | |
1659 | int mode = entry->mask; | |
1660 | int status; | |
1661 | ||
1662 | /* | |
1663 | * Determine which access bits we want to ask for... | |
1664 | */ | |
1665 | if (mode & MAY_READ) | |
1666 | args.access |= NFS4_ACCESS_READ; | |
1667 | if (S_ISDIR(inode->i_mode)) { | |
1668 | if (mode & MAY_WRITE) | |
1669 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1670 | if (mode & MAY_EXEC) | |
1671 | args.access |= NFS4_ACCESS_LOOKUP; | |
1672 | } else { | |
1673 | if (mode & MAY_WRITE) | |
1674 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1675 | if (mode & MAY_EXEC) | |
1676 | args.access |= NFS4_ACCESS_EXECUTE; | |
1677 | } | |
1678 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1679 | if (!status) { | |
1680 | entry->mask = 0; | |
1681 | if (res.access & NFS4_ACCESS_READ) | |
1682 | entry->mask |= MAY_READ; | |
1683 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1684 | entry->mask |= MAY_WRITE; | |
1685 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1686 | entry->mask |= MAY_EXEC; | |
1687 | } | |
1688 | return status; | |
1689 | } | |
1690 | ||
1691 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1692 | { | |
1693 | struct nfs4_exception exception = { }; | |
1694 | int err; | |
1695 | do { | |
1696 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1697 | _nfs4_proc_access(inode, entry), | |
1698 | &exception); | |
1699 | } while (exception.retry); | |
1700 | return err; | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * TODO: For the time being, we don't try to get any attributes | |
1705 | * along with any of the zero-copy operations READ, READDIR, | |
1706 | * READLINK, WRITE. | |
1707 | * | |
1708 | * In the case of the first three, we want to put the GETATTR | |
1709 | * after the read-type operation -- this is because it is hard | |
1710 | * to predict the length of a GETATTR response in v4, and thus | |
1711 | * align the READ data correctly. This means that the GETATTR | |
1712 | * may end up partially falling into the page cache, and we should | |
1713 | * shift it into the 'tail' of the xdr_buf before processing. | |
1714 | * To do this efficiently, we need to know the total length | |
1715 | * of data received, which doesn't seem to be available outside | |
1716 | * of the RPC layer. | |
1717 | * | |
1718 | * In the case of WRITE, we also want to put the GETATTR after | |
1719 | * the operation -- in this case because we want to make sure | |
1720 | * we get the post-operation mtime and size. This means that | |
1721 | * we can't use xdr_encode_pages() as written: we need a variant | |
1722 | * of it which would leave room in the 'tail' iovec. | |
1723 | * | |
1724 | * Both of these changes to the XDR layer would in fact be quite | |
1725 | * minor, but I decided to leave them for a subsequent patch. | |
1726 | */ | |
1727 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1728 | unsigned int pgbase, unsigned int pglen) | |
1729 | { | |
1730 | struct nfs4_readlink args = { | |
1731 | .fh = NFS_FH(inode), | |
1732 | .pgbase = pgbase, | |
1733 | .pglen = pglen, | |
1734 | .pages = &page, | |
1735 | }; | |
1736 | struct rpc_message msg = { | |
1737 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1738 | .rpc_argp = &args, | |
1739 | .rpc_resp = NULL, | |
1740 | }; | |
1741 | ||
1742 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1743 | } | |
1744 | ||
1745 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1746 | unsigned int pgbase, unsigned int pglen) | |
1747 | { | |
1748 | struct nfs4_exception exception = { }; | |
1749 | int err; | |
1750 | do { | |
1751 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1752 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1753 | &exception); | |
1754 | } while (exception.retry); | |
1755 | return err; | |
1756 | } | |
1757 | ||
1da177e4 LT |
1758 | /* |
1759 | * Got race? | |
1760 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1761 | * Until then, this create/open method is prone to inefficiency and race | |
1762 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1763 | * placed on the wire. | |
1764 | * | |
1765 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1766 | * The file will be opened again in the subsequent VFS open call | |
1767 | * (nfs4_proc_file_open). | |
1768 | * | |
1769 | * The open for read will just hang around to be used by any process that | |
1770 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1771 | */ | |
1772 | ||
1773 | static int | |
1774 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 1775 | int flags, struct nameidata *nd) |
1da177e4 | 1776 | { |
ad389da7 TM |
1777 | struct path path = { |
1778 | .mnt = nd->mnt, | |
1779 | .dentry = dentry, | |
1780 | }; | |
1da177e4 LT |
1781 | struct nfs4_state *state; |
1782 | struct rpc_cred *cred; | |
1783 | int status = 0; | |
1784 | ||
1f163415 | 1785 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
1da177e4 LT |
1786 | if (IS_ERR(cred)) { |
1787 | status = PTR_ERR(cred); | |
1788 | goto out; | |
1789 | } | |
ad389da7 | 1790 | state = nfs4_do_open(dir, &path, flags, sattr, cred); |
1da177e4 LT |
1791 | put_rpccred(cred); |
1792 | if (IS_ERR(state)) { | |
1793 | status = PTR_ERR(state); | |
1794 | goto out; | |
1795 | } | |
24ac23ab | 1796 | d_instantiate(dentry, igrab(state->inode)); |
1da177e4 LT |
1797 | if (flags & O_EXCL) { |
1798 | struct nfs_fattr fattr; | |
3e4f6290 | 1799 | status = nfs4_do_setattr(state->inode, &fattr, sattr, state); |
02a913a7 | 1800 | if (status == 0) |
65e4308d | 1801 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 1802 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 1803 | } |
ad389da7 | 1804 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
4a35bd41 | 1805 | status = nfs4_intent_set_file(nd, &path, state); |
02a913a7 | 1806 | else |
4a35bd41 | 1807 | nfs4_close_state(&path, state, flags); |
1da177e4 LT |
1808 | out: |
1809 | return status; | |
1810 | } | |
1811 | ||
1812 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1813 | { | |
16e42959 | 1814 | struct nfs_server *server = NFS_SERVER(dir); |
1da177e4 LT |
1815 | struct nfs4_remove_arg args = { |
1816 | .fh = NFS_FH(dir), | |
1817 | .name = name, | |
16e42959 TM |
1818 | .bitmask = server->attr_bitmask, |
1819 | }; | |
1820 | struct nfs_fattr dir_attr; | |
1821 | struct nfs4_remove_res res = { | |
1822 | .server = server, | |
1823 | .dir_attr = &dir_attr, | |
1da177e4 | 1824 | }; |
1da177e4 LT |
1825 | struct rpc_message msg = { |
1826 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1827 | .rpc_argp = &args, | |
1828 | .rpc_resp = &res, | |
1829 | }; | |
1830 | int status; | |
1831 | ||
16e42959 TM |
1832 | nfs_fattr_init(res.dir_attr); |
1833 | status = rpc_call_sync(server->client, &msg, 0); | |
1834 | if (status == 0) { | |
1835 | update_changeattr(dir, &res.cinfo); | |
1836 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1837 | } | |
1da177e4 LT |
1838 | return status; |
1839 | } | |
1840 | ||
1841 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1842 | { | |
1843 | struct nfs4_exception exception = { }; | |
1844 | int err; | |
1845 | do { | |
1846 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1847 | _nfs4_proc_remove(dir, name), | |
1848 | &exception); | |
1849 | } while (exception.retry); | |
1850 | return err; | |
1851 | } | |
1852 | ||
1853 | struct unlink_desc { | |
1854 | struct nfs4_remove_arg args; | |
16e42959 TM |
1855 | struct nfs4_remove_res res; |
1856 | struct nfs_fattr dir_attr; | |
1da177e4 LT |
1857 | }; |
1858 | ||
1859 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1860 | struct qstr *name) | |
1861 | { | |
16e42959 | 1862 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
1da177e4 LT |
1863 | struct unlink_desc *up; |
1864 | ||
5cbded58 | 1865 | up = kmalloc(sizeof(*up), GFP_KERNEL); |
1da177e4 LT |
1866 | if (!up) |
1867 | return -ENOMEM; | |
1868 | ||
1869 | up->args.fh = NFS_FH(dir->d_inode); | |
1870 | up->args.name = name; | |
16e42959 TM |
1871 | up->args.bitmask = server->attr_bitmask; |
1872 | up->res.server = server; | |
1873 | up->res.dir_attr = &up->dir_attr; | |
1da177e4 LT |
1874 | |
1875 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1876 | msg->rpc_argp = &up->args; | |
1877 | msg->rpc_resp = &up->res; | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1882 | { | |
1883 | struct rpc_message *msg = &task->tk_msg; | |
1884 | struct unlink_desc *up; | |
1885 | ||
1886 | if (msg->rpc_resp != NULL) { | |
1887 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
16e42959 TM |
1888 | update_changeattr(dir->d_inode, &up->res.cinfo); |
1889 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); | |
1da177e4 LT |
1890 | kfree(up); |
1891 | msg->rpc_resp = NULL; | |
1892 | msg->rpc_argp = NULL; | |
1893 | } | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1898 | struct inode *new_dir, struct qstr *new_name) | |
1899 | { | |
6caf2c82 | 1900 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
1901 | struct nfs4_rename_arg arg = { |
1902 | .old_dir = NFS_FH(old_dir), | |
1903 | .new_dir = NFS_FH(new_dir), | |
1904 | .old_name = old_name, | |
1905 | .new_name = new_name, | |
6caf2c82 TM |
1906 | .bitmask = server->attr_bitmask, |
1907 | }; | |
1908 | struct nfs_fattr old_fattr, new_fattr; | |
1909 | struct nfs4_rename_res res = { | |
1910 | .server = server, | |
1911 | .old_fattr = &old_fattr, | |
1912 | .new_fattr = &new_fattr, | |
1da177e4 | 1913 | }; |
1da177e4 LT |
1914 | struct rpc_message msg = { |
1915 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
1916 | .rpc_argp = &arg, | |
1917 | .rpc_resp = &res, | |
1918 | }; | |
1919 | int status; | |
1920 | ||
6caf2c82 TM |
1921 | nfs_fattr_init(res.old_fattr); |
1922 | nfs_fattr_init(res.new_fattr); | |
1923 | status = rpc_call_sync(server->client, &msg, 0); | |
1da177e4 LT |
1924 | |
1925 | if (!status) { | |
1926 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 1927 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 1928 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 1929 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
1930 | } |
1931 | return status; | |
1932 | } | |
1933 | ||
1934 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1935 | struct inode *new_dir, struct qstr *new_name) | |
1936 | { | |
1937 | struct nfs4_exception exception = { }; | |
1938 | int err; | |
1939 | do { | |
1940 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
1941 | _nfs4_proc_rename(old_dir, old_name, | |
1942 | new_dir, new_name), | |
1943 | &exception); | |
1944 | } while (exception.retry); | |
1945 | return err; | |
1946 | } | |
1947 | ||
1948 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1949 | { | |
91ba2eee | 1950 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1951 | struct nfs4_link_arg arg = { |
1952 | .fh = NFS_FH(inode), | |
1953 | .dir_fh = NFS_FH(dir), | |
1954 | .name = name, | |
91ba2eee TM |
1955 | .bitmask = server->attr_bitmask, |
1956 | }; | |
1957 | struct nfs_fattr fattr, dir_attr; | |
1958 | struct nfs4_link_res res = { | |
1959 | .server = server, | |
1960 | .fattr = &fattr, | |
1961 | .dir_attr = &dir_attr, | |
1da177e4 | 1962 | }; |
1da177e4 LT |
1963 | struct rpc_message msg = { |
1964 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
1965 | .rpc_argp = &arg, | |
91ba2eee | 1966 | .rpc_resp = &res, |
1da177e4 LT |
1967 | }; |
1968 | int status; | |
1969 | ||
91ba2eee TM |
1970 | nfs_fattr_init(res.fattr); |
1971 | nfs_fattr_init(res.dir_attr); | |
1972 | status = rpc_call_sync(server->client, &msg, 0); | |
1973 | if (!status) { | |
1974 | update_changeattr(dir, &res.cinfo); | |
1975 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 1976 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 1977 | } |
1da177e4 LT |
1978 | |
1979 | return status; | |
1980 | } | |
1981 | ||
1982 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1983 | { | |
1984 | struct nfs4_exception exception = { }; | |
1985 | int err; | |
1986 | do { | |
1987 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1988 | _nfs4_proc_link(inode, dir, name), | |
1989 | &exception); | |
1990 | } while (exception.retry); | |
1991 | return err; | |
1992 | } | |
1993 | ||
4f390c15 | 1994 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 1995 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
1996 | { |
1997 | struct nfs_server *server = NFS_SERVER(dir); | |
4f390c15 CL |
1998 | struct nfs_fh fhandle; |
1999 | struct nfs_fattr fattr, dir_fattr; | |
1da177e4 LT |
2000 | struct nfs4_create_arg arg = { |
2001 | .dir_fh = NFS_FH(dir), | |
2002 | .server = server, | |
4f390c15 | 2003 | .name = &dentry->d_name, |
1da177e4 LT |
2004 | .attrs = sattr, |
2005 | .ftype = NF4LNK, | |
2006 | .bitmask = server->attr_bitmask, | |
2007 | }; | |
2008 | struct nfs4_create_res res = { | |
2009 | .server = server, | |
4f390c15 CL |
2010 | .fh = &fhandle, |
2011 | .fattr = &fattr, | |
56ae19f3 | 2012 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2013 | }; |
2014 | struct rpc_message msg = { | |
2015 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
2016 | .rpc_argp = &arg, | |
2017 | .rpc_resp = &res, | |
2018 | }; | |
2019 | int status; | |
2020 | ||
94a6d753 | 2021 | if (len > NFS4_MAXPATHLEN) |
1da177e4 | 2022 | return -ENAMETOOLONG; |
4f390c15 | 2023 | |
94a6d753 CL |
2024 | arg.u.symlink.pages = &page; |
2025 | arg.u.symlink.len = len; | |
4f390c15 | 2026 | nfs_fattr_init(&fattr); |
56ae19f3 | 2027 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2028 | |
2029 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
4f390c15 | 2030 | if (!status) { |
1da177e4 | 2031 | update_changeattr(dir, &res.dir_cinfo); |
4f390c15 CL |
2032 | nfs_post_op_update_inode(dir, res.dir_fattr); |
2033 | status = nfs_instantiate(dentry, &fhandle, &fattr); | |
2034 | } | |
1da177e4 LT |
2035 | return status; |
2036 | } | |
2037 | ||
4f390c15 | 2038 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2039 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2040 | { |
2041 | struct nfs4_exception exception = { }; | |
2042 | int err; | |
2043 | do { | |
2044 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2045 | _nfs4_proc_symlink(dir, dentry, page, |
2046 | len, sattr), | |
1da177e4 LT |
2047 | &exception); |
2048 | } while (exception.retry); | |
2049 | return err; | |
2050 | } | |
2051 | ||
2052 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2053 | struct iattr *sattr) | |
2054 | { | |
2055 | struct nfs_server *server = NFS_SERVER(dir); | |
2056 | struct nfs_fh fhandle; | |
56ae19f3 | 2057 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2058 | struct nfs4_create_arg arg = { |
2059 | .dir_fh = NFS_FH(dir), | |
2060 | .server = server, | |
2061 | .name = &dentry->d_name, | |
2062 | .attrs = sattr, | |
2063 | .ftype = NF4DIR, | |
2064 | .bitmask = server->attr_bitmask, | |
2065 | }; | |
2066 | struct nfs4_create_res res = { | |
2067 | .server = server, | |
2068 | .fh = &fhandle, | |
2069 | .fattr = &fattr, | |
56ae19f3 | 2070 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2071 | }; |
2072 | struct rpc_message msg = { | |
2073 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2074 | .rpc_argp = &arg, | |
2075 | .rpc_resp = &res, | |
2076 | }; | |
2077 | int status; | |
2078 | ||
0e574af1 | 2079 | nfs_fattr_init(&fattr); |
56ae19f3 | 2080 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2081 | |
2082 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2083 | if (!status) { | |
2084 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2085 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2086 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
2087 | } | |
2088 | return status; | |
2089 | } | |
2090 | ||
2091 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2092 | struct iattr *sattr) | |
2093 | { | |
2094 | struct nfs4_exception exception = { }; | |
2095 | int err; | |
2096 | do { | |
2097 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2098 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2099 | &exception); | |
2100 | } while (exception.retry); | |
2101 | return err; | |
2102 | } | |
2103 | ||
2104 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2105 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2106 | { | |
2107 | struct inode *dir = dentry->d_inode; | |
2108 | struct nfs4_readdir_arg args = { | |
2109 | .fh = NFS_FH(dir), | |
2110 | .pages = &page, | |
2111 | .pgbase = 0, | |
2112 | .count = count, | |
2113 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
2114 | }; | |
2115 | struct nfs4_readdir_res res; | |
2116 | struct rpc_message msg = { | |
2117 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2118 | .rpc_argp = &args, | |
2119 | .rpc_resp = &res, | |
2120 | .rpc_cred = cred, | |
2121 | }; | |
2122 | int status; | |
2123 | ||
eadf4598 TM |
2124 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
2125 | dentry->d_parent->d_name.name, | |
2126 | dentry->d_name.name, | |
2127 | (unsigned long long)cookie); | |
1da177e4 LT |
2128 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2129 | res.pgbase = args.pgbase; | |
2130 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2131 | if (status == 0) | |
2132 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
eadf4598 | 2133 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
1da177e4 LT |
2134 | return status; |
2135 | } | |
2136 | ||
2137 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2138 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2139 | { | |
2140 | struct nfs4_exception exception = { }; | |
2141 | int err; | |
2142 | do { | |
2143 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2144 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2145 | page, count, plus), | |
2146 | &exception); | |
2147 | } while (exception.retry); | |
2148 | return err; | |
2149 | } | |
2150 | ||
2151 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2152 | struct iattr *sattr, dev_t rdev) | |
2153 | { | |
2154 | struct nfs_server *server = NFS_SERVER(dir); | |
2155 | struct nfs_fh fh; | |
56ae19f3 | 2156 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2157 | struct nfs4_create_arg arg = { |
2158 | .dir_fh = NFS_FH(dir), | |
2159 | .server = server, | |
2160 | .name = &dentry->d_name, | |
2161 | .attrs = sattr, | |
2162 | .bitmask = server->attr_bitmask, | |
2163 | }; | |
2164 | struct nfs4_create_res res = { | |
2165 | .server = server, | |
2166 | .fh = &fh, | |
2167 | .fattr = &fattr, | |
56ae19f3 | 2168 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2169 | }; |
2170 | struct rpc_message msg = { | |
2171 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2172 | .rpc_argp = &arg, | |
2173 | .rpc_resp = &res, | |
2174 | }; | |
2175 | int status; | |
2176 | int mode = sattr->ia_mode; | |
2177 | ||
0e574af1 | 2178 | nfs_fattr_init(&fattr); |
56ae19f3 | 2179 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2180 | |
2181 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2182 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2183 | if (S_ISFIFO(mode)) | |
2184 | arg.ftype = NF4FIFO; | |
2185 | else if (S_ISBLK(mode)) { | |
2186 | arg.ftype = NF4BLK; | |
2187 | arg.u.device.specdata1 = MAJOR(rdev); | |
2188 | arg.u.device.specdata2 = MINOR(rdev); | |
2189 | } | |
2190 | else if (S_ISCHR(mode)) { | |
2191 | arg.ftype = NF4CHR; | |
2192 | arg.u.device.specdata1 = MAJOR(rdev); | |
2193 | arg.u.device.specdata2 = MINOR(rdev); | |
2194 | } | |
2195 | else | |
2196 | arg.ftype = NF4SOCK; | |
2197 | ||
2198 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2199 | if (status == 0) { | |
2200 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2201 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2202 | status = nfs_instantiate(dentry, &fh, &fattr); |
2203 | } | |
2204 | return status; | |
2205 | } | |
2206 | ||
2207 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2208 | struct iattr *sattr, dev_t rdev) | |
2209 | { | |
2210 | struct nfs4_exception exception = { }; | |
2211 | int err; | |
2212 | do { | |
2213 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2214 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2215 | &exception); | |
2216 | } while (exception.retry); | |
2217 | return err; | |
2218 | } | |
2219 | ||
2220 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2221 | struct nfs_fsstat *fsstat) | |
2222 | { | |
2223 | struct nfs4_statfs_arg args = { | |
2224 | .fh = fhandle, | |
2225 | .bitmask = server->attr_bitmask, | |
2226 | }; | |
2227 | struct rpc_message msg = { | |
2228 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2229 | .rpc_argp = &args, | |
2230 | .rpc_resp = fsstat, | |
2231 | }; | |
2232 | ||
0e574af1 | 2233 | nfs_fattr_init(fsstat->fattr); |
1da177e4 LT |
2234 | return rpc_call_sync(server->client, &msg, 0); |
2235 | } | |
2236 | ||
2237 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2238 | { | |
2239 | struct nfs4_exception exception = { }; | |
2240 | int err; | |
2241 | do { | |
2242 | err = nfs4_handle_exception(server, | |
2243 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2244 | &exception); | |
2245 | } while (exception.retry); | |
2246 | return err; | |
2247 | } | |
2248 | ||
2249 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2250 | struct nfs_fsinfo *fsinfo) | |
2251 | { | |
2252 | struct nfs4_fsinfo_arg args = { | |
2253 | .fh = fhandle, | |
2254 | .bitmask = server->attr_bitmask, | |
2255 | }; | |
2256 | struct rpc_message msg = { | |
2257 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2258 | .rpc_argp = &args, | |
2259 | .rpc_resp = fsinfo, | |
2260 | }; | |
2261 | ||
2262 | return rpc_call_sync(server->client, &msg, 0); | |
2263 | } | |
2264 | ||
2265 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2266 | { | |
2267 | struct nfs4_exception exception = { }; | |
2268 | int err; | |
2269 | ||
2270 | do { | |
2271 | err = nfs4_handle_exception(server, | |
2272 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2273 | &exception); | |
2274 | } while (exception.retry); | |
2275 | return err; | |
2276 | } | |
2277 | ||
2278 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2279 | { | |
0e574af1 | 2280 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2281 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2282 | } | |
2283 | ||
2284 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2285 | struct nfs_pathconf *pathconf) | |
2286 | { | |
2287 | struct nfs4_pathconf_arg args = { | |
2288 | .fh = fhandle, | |
2289 | .bitmask = server->attr_bitmask, | |
2290 | }; | |
2291 | struct rpc_message msg = { | |
2292 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2293 | .rpc_argp = &args, | |
2294 | .rpc_resp = pathconf, | |
2295 | }; | |
2296 | ||
2297 | /* None of the pathconf attributes are mandatory to implement */ | |
2298 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2299 | memset(pathconf, 0, sizeof(*pathconf)); | |
2300 | return 0; | |
2301 | } | |
2302 | ||
0e574af1 | 2303 | nfs_fattr_init(pathconf->fattr); |
1da177e4 LT |
2304 | return rpc_call_sync(server->client, &msg, 0); |
2305 | } | |
2306 | ||
2307 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2308 | struct nfs_pathconf *pathconf) | |
2309 | { | |
2310 | struct nfs4_exception exception = { }; | |
2311 | int err; | |
2312 | ||
2313 | do { | |
2314 | err = nfs4_handle_exception(server, | |
2315 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2316 | &exception); | |
2317 | } while (exception.retry); | |
2318 | return err; | |
2319 | } | |
2320 | ||
ec06c096 | 2321 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2322 | { |
ec06c096 | 2323 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2324 | |
ec06c096 | 2325 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { |
1da177e4 | 2326 | rpc_restart_call(task); |
ec06c096 | 2327 | return -EAGAIN; |
1da177e4 LT |
2328 | } |
2329 | if (task->tk_status > 0) | |
ec06c096 TM |
2330 | renew_lease(server, data->timestamp); |
2331 | return 0; | |
1da177e4 LT |
2332 | } |
2333 | ||
ec06c096 | 2334 | static void nfs4_proc_read_setup(struct nfs_read_data *data) |
1da177e4 | 2335 | { |
1da177e4 LT |
2336 | struct rpc_message msg = { |
2337 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2338 | .rpc_argp = &data->args, | |
2339 | .rpc_resp = &data->res, | |
2340 | .rpc_cred = data->cred, | |
2341 | }; | |
1da177e4 LT |
2342 | |
2343 | data->timestamp = jiffies; | |
2344 | ||
ec06c096 | 2345 | rpc_call_setup(&data->task, &msg, 0); |
1da177e4 LT |
2346 | } |
2347 | ||
788e7a89 | 2348 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2349 | { |
1da177e4 LT |
2350 | struct inode *inode = data->inode; |
2351 | ||
2352 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2353 | rpc_restart_call(task); | |
788e7a89 | 2354 | return -EAGAIN; |
1da177e4 | 2355 | } |
4f9838c7 | 2356 | if (task->tk_status >= 0) { |
1da177e4 | 2357 | renew_lease(NFS_SERVER(inode), data->timestamp); |
4f9838c7 TM |
2358 | nfs_post_op_update_inode(inode, data->res.fattr); |
2359 | } | |
788e7a89 | 2360 | return 0; |
1da177e4 LT |
2361 | } |
2362 | ||
788e7a89 | 2363 | static void nfs4_proc_write_setup(struct nfs_write_data *data, int how) |
1da177e4 | 2364 | { |
1da177e4 LT |
2365 | struct rpc_message msg = { |
2366 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2367 | .rpc_argp = &data->args, | |
2368 | .rpc_resp = &data->res, | |
2369 | .rpc_cred = data->cred, | |
2370 | }; | |
2371 | struct inode *inode = data->inode; | |
4f9838c7 | 2372 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 2373 | int stable; |
1da177e4 LT |
2374 | |
2375 | if (how & FLUSH_STABLE) { | |
2376 | if (!NFS_I(inode)->ncommit) | |
2377 | stable = NFS_FILE_SYNC; | |
2378 | else | |
2379 | stable = NFS_DATA_SYNC; | |
2380 | } else | |
2381 | stable = NFS_UNSTABLE; | |
2382 | data->args.stable = stable; | |
4f9838c7 TM |
2383 | data->args.bitmask = server->attr_bitmask; |
2384 | data->res.server = server; | |
1da177e4 LT |
2385 | |
2386 | data->timestamp = jiffies; | |
2387 | ||
1da177e4 | 2388 | /* Finalize the task. */ |
788e7a89 | 2389 | rpc_call_setup(&data->task, &msg, 0); |
1da177e4 LT |
2390 | } |
2391 | ||
788e7a89 | 2392 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2393 | { |
1da177e4 LT |
2394 | struct inode *inode = data->inode; |
2395 | ||
2396 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2397 | rpc_restart_call(task); | |
788e7a89 | 2398 | return -EAGAIN; |
1da177e4 | 2399 | } |
4f9838c7 TM |
2400 | if (task->tk_status >= 0) |
2401 | nfs_post_op_update_inode(inode, data->res.fattr); | |
788e7a89 | 2402 | return 0; |
1da177e4 LT |
2403 | } |
2404 | ||
788e7a89 | 2405 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how) |
1da177e4 | 2406 | { |
1da177e4 LT |
2407 | struct rpc_message msg = { |
2408 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2409 | .rpc_argp = &data->args, | |
2410 | .rpc_resp = &data->res, | |
2411 | .rpc_cred = data->cred, | |
2412 | }; | |
788e7a89 | 2413 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2414 | |
4f9838c7 TM |
2415 | data->args.bitmask = server->attr_bitmask; |
2416 | data->res.server = server; | |
2417 | ||
788e7a89 | 2418 | rpc_call_setup(&data->task, &msg, 0); |
1da177e4 LT |
2419 | } |
2420 | ||
2421 | /* | |
2422 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2423 | * standalone procedure for queueing an asynchronous RENEW. | |
2424 | */ | |
963d8fe5 | 2425 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2426 | { |
adfa6f98 | 2427 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2428 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2429 | |
2430 | if (task->tk_status < 0) { | |
2431 | switch (task->tk_status) { | |
2432 | case -NFS4ERR_STALE_CLIENTID: | |
2433 | case -NFS4ERR_EXPIRED: | |
2434 | case -NFS4ERR_CB_PATH_DOWN: | |
2435 | nfs4_schedule_state_recovery(clp); | |
2436 | } | |
2437 | return; | |
2438 | } | |
2439 | spin_lock(&clp->cl_lock); | |
2440 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2441 | clp->cl_last_renewal = timestamp; | |
2442 | spin_unlock(&clp->cl_lock); | |
2443 | } | |
2444 | ||
963d8fe5 TM |
2445 | static const struct rpc_call_ops nfs4_renew_ops = { |
2446 | .rpc_call_done = nfs4_renew_done, | |
2447 | }; | |
2448 | ||
adfa6f98 | 2449 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2450 | { |
2451 | struct rpc_message msg = { | |
2452 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2453 | .rpc_argp = clp, | |
b4454fe1 | 2454 | .rpc_cred = cred, |
1da177e4 LT |
2455 | }; |
2456 | ||
2457 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2458 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2459 | } |
2460 | ||
adfa6f98 | 2461 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2462 | { |
2463 | struct rpc_message msg = { | |
2464 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2465 | .rpc_argp = clp, | |
b4454fe1 | 2466 | .rpc_cred = cred, |
1da177e4 LT |
2467 | }; |
2468 | unsigned long now = jiffies; | |
2469 | int status; | |
2470 | ||
2471 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2472 | if (status < 0) | |
2473 | return status; | |
2474 | spin_lock(&clp->cl_lock); | |
2475 | if (time_before(clp->cl_last_renewal,now)) | |
2476 | clp->cl_last_renewal = now; | |
2477 | spin_unlock(&clp->cl_lock); | |
2478 | return 0; | |
2479 | } | |
2480 | ||
aa1870af BF |
2481 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2482 | { | |
2483 | return (server->caps & NFS_CAP_ACLS) | |
2484 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2485 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2486 | } | |
2487 | ||
2488 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2489 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2490 | * the stack. | |
2491 | */ | |
2492 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2493 | ||
2494 | static void buf_to_pages(const void *buf, size_t buflen, | |
2495 | struct page **pages, unsigned int *pgbase) | |
2496 | { | |
2497 | const void *p = buf; | |
2498 | ||
2499 | *pgbase = offset_in_page(buf); | |
2500 | p -= *pgbase; | |
2501 | while (p < buf + buflen) { | |
2502 | *(pages++) = virt_to_page(p); | |
2503 | p += PAGE_CACHE_SIZE; | |
2504 | } | |
2505 | } | |
2506 | ||
e50a1c2e BF |
2507 | struct nfs4_cached_acl { |
2508 | int cached; | |
2509 | size_t len; | |
3e9d4154 | 2510 | char data[0]; |
e50a1c2e BF |
2511 | }; |
2512 | ||
2513 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2514 | { | |
2515 | struct nfs_inode *nfsi = NFS_I(inode); | |
2516 | ||
2517 | spin_lock(&inode->i_lock); | |
2518 | kfree(nfsi->nfs4_acl); | |
2519 | nfsi->nfs4_acl = acl; | |
2520 | spin_unlock(&inode->i_lock); | |
2521 | } | |
2522 | ||
2523 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2524 | { | |
2525 | nfs4_set_cached_acl(inode, NULL); | |
2526 | } | |
2527 | ||
2528 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2529 | { | |
2530 | struct nfs_inode *nfsi = NFS_I(inode); | |
2531 | struct nfs4_cached_acl *acl; | |
2532 | int ret = -ENOENT; | |
2533 | ||
2534 | spin_lock(&inode->i_lock); | |
2535 | acl = nfsi->nfs4_acl; | |
2536 | if (acl == NULL) | |
2537 | goto out; | |
2538 | if (buf == NULL) /* user is just asking for length */ | |
2539 | goto out_len; | |
2540 | if (acl->cached == 0) | |
2541 | goto out; | |
2542 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2543 | if (acl->len > buflen) | |
2544 | goto out; | |
2545 | memcpy(buf, acl->data, acl->len); | |
2546 | out_len: | |
2547 | ret = acl->len; | |
2548 | out: | |
2549 | spin_unlock(&inode->i_lock); | |
2550 | return ret; | |
2551 | } | |
2552 | ||
2553 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2554 | { | |
2555 | struct nfs4_cached_acl *acl; | |
2556 | ||
2557 | if (buf && acl_len <= PAGE_SIZE) { | |
2558 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2559 | if (acl == NULL) | |
2560 | goto out; | |
2561 | acl->cached = 1; | |
2562 | memcpy(acl->data, buf, acl_len); | |
2563 | } else { | |
2564 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2565 | if (acl == NULL) | |
2566 | goto out; | |
2567 | acl->cached = 0; | |
2568 | } | |
2569 | acl->len = acl_len; | |
2570 | out: | |
2571 | nfs4_set_cached_acl(inode, acl); | |
2572 | } | |
2573 | ||
16b4289c | 2574 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 2575 | { |
aa1870af BF |
2576 | struct page *pages[NFS4ACL_MAXPAGES]; |
2577 | struct nfs_getaclargs args = { | |
2578 | .fh = NFS_FH(inode), | |
2579 | .acl_pages = pages, | |
2580 | .acl_len = buflen, | |
2581 | }; | |
2582 | size_t resp_len = buflen; | |
e50a1c2e | 2583 | void *resp_buf; |
aa1870af BF |
2584 | struct rpc_message msg = { |
2585 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2586 | .rpc_argp = &args, | |
2587 | .rpc_resp = &resp_len, | |
2588 | }; | |
e50a1c2e | 2589 | struct page *localpage = NULL; |
aa1870af BF |
2590 | int ret; |
2591 | ||
e50a1c2e BF |
2592 | if (buflen < PAGE_SIZE) { |
2593 | /* As long as we're doing a round trip to the server anyway, | |
2594 | * let's be prepared for a page of acl data. */ | |
2595 | localpage = alloc_page(GFP_KERNEL); | |
2596 | resp_buf = page_address(localpage); | |
2597 | if (localpage == NULL) | |
2598 | return -ENOMEM; | |
2599 | args.acl_pages[0] = localpage; | |
2600 | args.acl_pgbase = 0; | |
1d95db8e | 2601 | resp_len = args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2602 | } else { |
2603 | resp_buf = buf; | |
2604 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2605 | } | |
aa1870af | 2606 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2607 | if (ret) |
2608 | goto out_free; | |
2609 | if (resp_len > args.acl_len) | |
2610 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2611 | else | |
2612 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2613 | if (buf) { | |
2614 | ret = -ERANGE; | |
2615 | if (resp_len > buflen) | |
2616 | goto out_free; | |
2617 | if (localpage) | |
2618 | memcpy(buf, resp_buf, resp_len); | |
2619 | } | |
2620 | ret = resp_len; | |
2621 | out_free: | |
2622 | if (localpage) | |
2623 | __free_page(localpage); | |
aa1870af BF |
2624 | return ret; |
2625 | } | |
2626 | ||
16b4289c TM |
2627 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
2628 | { | |
2629 | struct nfs4_exception exception = { }; | |
2630 | ssize_t ret; | |
2631 | do { | |
2632 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
2633 | if (ret >= 0) | |
2634 | break; | |
2635 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
2636 | } while (exception.retry); | |
2637 | return ret; | |
2638 | } | |
2639 | ||
e50a1c2e BF |
2640 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2641 | { | |
2642 | struct nfs_server *server = NFS_SERVER(inode); | |
2643 | int ret; | |
2644 | ||
2645 | if (!nfs4_server_supports_acls(server)) | |
2646 | return -EOPNOTSUPP; | |
2647 | ret = nfs_revalidate_inode(server, inode); | |
2648 | if (ret < 0) | |
2649 | return ret; | |
2650 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2651 | if (ret != -ENOENT) | |
2652 | return ret; | |
2653 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2654 | } | |
2655 | ||
16b4289c | 2656 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
2657 | { |
2658 | struct nfs_server *server = NFS_SERVER(inode); | |
2659 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2660 | struct nfs_setaclargs arg = { | |
2661 | .fh = NFS_FH(inode), | |
2662 | .acl_pages = pages, | |
2663 | .acl_len = buflen, | |
2664 | }; | |
2665 | struct rpc_message msg = { | |
2666 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2667 | .rpc_argp = &arg, | |
2668 | .rpc_resp = NULL, | |
2669 | }; | |
2670 | int ret; | |
2671 | ||
2672 | if (!nfs4_server_supports_acls(server)) | |
2673 | return -EOPNOTSUPP; | |
642ac549 | 2674 | nfs_inode_return_delegation(inode); |
4b580ee3 | 2675 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
1f163415 | 2676 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
08efa202 | 2677 | nfs_zap_caches(inode); |
4b580ee3 BF |
2678 | return ret; |
2679 | } | |
2680 | ||
16b4289c TM |
2681 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2682 | { | |
2683 | struct nfs4_exception exception = { }; | |
2684 | int err; | |
2685 | do { | |
2686 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2687 | __nfs4_proc_set_acl(inode, buf, buflen), | |
2688 | &exception); | |
2689 | } while (exception.retry); | |
2690 | return err; | |
2691 | } | |
2692 | ||
1da177e4 | 2693 | static int |
faf5f49c | 2694 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
1da177e4 | 2695 | { |
7539bbab | 2696 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2697 | |
2698 | if (!clp || task->tk_status >= 0) | |
2699 | return 0; | |
2700 | switch(task->tk_status) { | |
2701 | case -NFS4ERR_STALE_CLIENTID: | |
2702 | case -NFS4ERR_STALE_STATEID: | |
2703 | case -NFS4ERR_EXPIRED: | |
2704 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2705 | nfs4_schedule_state_recovery(clp); | |
433fbe4c | 2706 | if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0) |
1da177e4 LT |
2707 | rpc_wake_up_task(task); |
2708 | task->tk_status = 0; | |
2709 | return -EAGAIN; | |
1da177e4 | 2710 | case -NFS4ERR_DELAY: |
006ea73e CL |
2711 | nfs_inc_server_stats((struct nfs_server *) server, |
2712 | NFSIOS_DELAY); | |
2713 | case -NFS4ERR_GRACE: | |
1da177e4 LT |
2714 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
2715 | task->tk_status = 0; | |
2716 | return -EAGAIN; | |
2717 | case -NFS4ERR_OLD_STATEID: | |
2718 | task->tk_status = 0; | |
2719 | return -EAGAIN; | |
2720 | } | |
2721 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2722 | return 0; | |
2723 | } | |
2724 | ||
433fbe4c TM |
2725 | static int nfs4_wait_bit_interruptible(void *word) |
2726 | { | |
2727 | if (signal_pending(current)) | |
2728 | return -ERESTARTSYS; | |
2729 | schedule(); | |
2730 | return 0; | |
2731 | } | |
2732 | ||
adfa6f98 | 2733 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp) |
1da177e4 | 2734 | { |
1da177e4 | 2735 | sigset_t oldset; |
433fbe4c | 2736 | int res; |
1da177e4 LT |
2737 | |
2738 | might_sleep(); | |
2739 | ||
e148582e TM |
2740 | rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_); |
2741 | ||
1da177e4 | 2742 | rpc_clnt_sigmask(clnt, &oldset); |
433fbe4c TM |
2743 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER, |
2744 | nfs4_wait_bit_interruptible, | |
2745 | TASK_INTERRUPTIBLE); | |
1da177e4 | 2746 | rpc_clnt_sigunmask(clnt, &oldset); |
e148582e TM |
2747 | |
2748 | rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_); | |
1da177e4 LT |
2749 | return res; |
2750 | } | |
2751 | ||
2752 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2753 | { | |
2754 | sigset_t oldset; | |
2755 | int res = 0; | |
2756 | ||
2757 | might_sleep(); | |
2758 | ||
2759 | if (*timeout <= 0) | |
2760 | *timeout = NFS4_POLL_RETRY_MIN; | |
2761 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2762 | *timeout = NFS4_POLL_RETRY_MAX; | |
2763 | rpc_clnt_sigmask(clnt, &oldset); | |
2764 | if (clnt->cl_intr) { | |
041e0e3b | 2765 | schedule_timeout_interruptible(*timeout); |
1da177e4 LT |
2766 | if (signalled()) |
2767 | res = -ERESTARTSYS; | |
041e0e3b NA |
2768 | } else |
2769 | schedule_timeout_uninterruptible(*timeout); | |
1da177e4 LT |
2770 | rpc_clnt_sigunmask(clnt, &oldset); |
2771 | *timeout <<= 1; | |
2772 | return res; | |
2773 | } | |
2774 | ||
2775 | /* This is the error handling routine for processes that are allowed | |
2776 | * to sleep. | |
2777 | */ | |
10afec90 | 2778 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
1da177e4 | 2779 | { |
7539bbab | 2780 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
2781 | int ret = errorcode; |
2782 | ||
2783 | exception->retry = 0; | |
2784 | switch(errorcode) { | |
2785 | case 0: | |
2786 | return 0; | |
2787 | case -NFS4ERR_STALE_CLIENTID: | |
2788 | case -NFS4ERR_STALE_STATEID: | |
2789 | case -NFS4ERR_EXPIRED: | |
433fbe4c | 2790 | nfs4_schedule_state_recovery(clp); |
1da177e4 LT |
2791 | ret = nfs4_wait_clnt_recover(server->client, clp); |
2792 | if (ret == 0) | |
2793 | exception->retry = 1; | |
2794 | break; | |
c514983d | 2795 | case -NFS4ERR_FILE_OPEN: |
1da177e4 LT |
2796 | case -NFS4ERR_GRACE: |
2797 | case -NFS4ERR_DELAY: | |
2798 | ret = nfs4_delay(server->client, &exception->timeout); | |
2c56617d TM |
2799 | if (ret != 0) |
2800 | break; | |
1da177e4 | 2801 | case -NFS4ERR_OLD_STATEID: |
2c56617d | 2802 | exception->retry = 1; |
1da177e4 LT |
2803 | } |
2804 | /* We failed to handle the error */ | |
2805 | return nfs4_map_errors(ret); | |
2806 | } | |
2807 | ||
adfa6f98 | 2808 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
2809 | { |
2810 | nfs4_verifier sc_verifier; | |
2811 | struct nfs4_setclientid setclientid = { | |
2812 | .sc_verifier = &sc_verifier, | |
2813 | .sc_prog = program, | |
2814 | }; | |
2815 | struct rpc_message msg = { | |
2816 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2817 | .rpc_argp = &setclientid, | |
2818 | .rpc_resp = clp, | |
286d7d6a | 2819 | .rpc_cred = cred, |
1da177e4 | 2820 | }; |
bc4785cd | 2821 | __be32 *p; |
1da177e4 LT |
2822 | int loop = 0; |
2823 | int status; | |
2824 | ||
bc4785cd | 2825 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
2826 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
2827 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2828 | ||
2829 | for(;;) { | |
2830 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2831 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
24c8dbbb | 2832 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr), |
286d7d6a | 2833 | cred->cr_ops->cr_name, |
1da177e4 LT |
2834 | clp->cl_id_uniquifier); |
2835 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2836 | sizeof(setclientid.sc_netid), "tcp"); | |
2837 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2838 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2839 | clp->cl_ipaddr, port >> 8, port & 255); | |
2840 | ||
2841 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2842 | if (status != -NFS4ERR_CLID_INUSE) | |
2843 | break; | |
2844 | if (signalled()) | |
2845 | break; | |
2846 | if (loop++ & 1) | |
2847 | ssleep(clp->cl_lease_time + 1); | |
2848 | else | |
2849 | if (++clp->cl_id_uniquifier == 0) | |
2850 | break; | |
2851 | } | |
2852 | return status; | |
2853 | } | |
2854 | ||
adfa6f98 | 2855 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2856 | { |
2857 | struct nfs_fsinfo fsinfo; | |
2858 | struct rpc_message msg = { | |
2859 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2860 | .rpc_argp = clp, | |
2861 | .rpc_resp = &fsinfo, | |
286d7d6a | 2862 | .rpc_cred = cred, |
1da177e4 LT |
2863 | }; |
2864 | unsigned long now; | |
2865 | int status; | |
2866 | ||
2867 | now = jiffies; | |
2868 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2869 | if (status == 0) { | |
2870 | spin_lock(&clp->cl_lock); | |
2871 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2872 | clp->cl_last_renewal = now; | |
58d9714a | 2873 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
1da177e4 LT |
2874 | spin_unlock(&clp->cl_lock); |
2875 | } | |
2876 | return status; | |
2877 | } | |
2878 | ||
adfa6f98 | 2879 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b TM |
2880 | { |
2881 | long timeout; | |
2882 | int err; | |
2883 | do { | |
2884 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
2885 | switch (err) { | |
2886 | case 0: | |
2887 | return err; | |
2888 | case -NFS4ERR_RESOURCE: | |
2889 | /* The IBM lawyers misread another document! */ | |
2890 | case -NFS4ERR_DELAY: | |
2891 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
2892 | } | |
2893 | } while (err == 0); | |
2894 | return err; | |
2895 | } | |
2896 | ||
fe650407 TM |
2897 | struct nfs4_delegreturndata { |
2898 | struct nfs4_delegreturnargs args; | |
fa178f29 | 2899 | struct nfs4_delegreturnres res; |
fe650407 TM |
2900 | struct nfs_fh fh; |
2901 | nfs4_stateid stateid; | |
2902 | struct rpc_cred *cred; | |
26e976a8 | 2903 | unsigned long timestamp; |
fa178f29 | 2904 | struct nfs_fattr fattr; |
fe650407 TM |
2905 | int rpc_status; |
2906 | }; | |
2907 | ||
2908 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) | |
1da177e4 | 2909 | { |
fe650407 | 2910 | struct nfs4_delegreturndata *data = calldata; |
1da177e4 LT |
2911 | struct rpc_message msg = { |
2912 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
fe650407 | 2913 | .rpc_argp = &data->args, |
fa178f29 | 2914 | .rpc_resp = &data->res, |
fe650407 | 2915 | .rpc_cred = data->cred, |
1da177e4 | 2916 | }; |
fa178f29 | 2917 | nfs_fattr_init(data->res.fattr); |
fe650407 TM |
2918 | rpc_call_setup(task, &msg, 0); |
2919 | } | |
1da177e4 | 2920 | |
fe650407 TM |
2921 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
2922 | { | |
2923 | struct nfs4_delegreturndata *data = calldata; | |
2924 | data->rpc_status = task->tk_status; | |
26e976a8 | 2925 | if (data->rpc_status == 0) |
fa178f29 | 2926 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
2927 | } |
2928 | ||
2929 | static void nfs4_delegreturn_release(void *calldata) | |
2930 | { | |
2931 | struct nfs4_delegreturndata *data = calldata; | |
2932 | ||
2933 | put_rpccred(data->cred); | |
2934 | kfree(calldata); | |
2935 | } | |
2936 | ||
c8d149f3 | 2937 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
fe650407 TM |
2938 | .rpc_call_prepare = nfs4_delegreturn_prepare, |
2939 | .rpc_call_done = nfs4_delegreturn_done, | |
2940 | .rpc_release = nfs4_delegreturn_release, | |
2941 | }; | |
2942 | ||
2943 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2944 | { | |
2945 | struct nfs4_delegreturndata *data; | |
fa178f29 | 2946 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 TM |
2947 | struct rpc_task *task; |
2948 | int status; | |
2949 | ||
2950 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
2951 | if (data == NULL) | |
2952 | return -ENOMEM; | |
2953 | data->args.fhandle = &data->fh; | |
2954 | data->args.stateid = &data->stateid; | |
fa178f29 | 2955 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
2956 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
2957 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
2958 | data->res.fattr = &data->fattr; |
2959 | data->res.server = server; | |
fe650407 | 2960 | data->cred = get_rpccred(cred); |
26e976a8 | 2961 | data->timestamp = jiffies; |
fe650407 TM |
2962 | data->rpc_status = 0; |
2963 | ||
2964 | task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); | |
7a1218a2 | 2965 | if (IS_ERR(task)) |
fe650407 | 2966 | return PTR_ERR(task); |
fe650407 | 2967 | status = nfs4_wait_for_completion_rpc_task(task); |
fa178f29 | 2968 | if (status == 0) { |
fe650407 | 2969 | status = data->rpc_status; |
fa178f29 TM |
2970 | if (status == 0) |
2971 | nfs_post_op_update_inode(inode, &data->fattr); | |
2972 | } | |
e6b3c4db | 2973 | rpc_put_task(task); |
fe650407 | 2974 | return status; |
1da177e4 LT |
2975 | } |
2976 | ||
2977 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2978 | { | |
2979 | struct nfs_server *server = NFS_SERVER(inode); | |
2980 | struct nfs4_exception exception = { }; | |
2981 | int err; | |
2982 | do { | |
2983 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
2984 | switch (err) { | |
2985 | case -NFS4ERR_STALE_STATEID: | |
2986 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
2987 | case 0: |
2988 | return 0; | |
2989 | } | |
2990 | err = nfs4_handle_exception(server, err, &exception); | |
2991 | } while (exception.retry); | |
2992 | return err; | |
2993 | } | |
2994 | ||
2995 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
2996 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
2997 | ||
2998 | /* | |
2999 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3000 | */ | |
3001 | static unsigned long | |
3002 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3003 | { | |
041e0e3b | 3004 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
3005 | timeout <<= 1; |
3006 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3007 | return NFS4_LOCK_MAXTIMEOUT; | |
3008 | return timeout; | |
3009 | } | |
3010 | ||
1da177e4 LT |
3011 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3012 | { | |
3013 | struct inode *inode = state->inode; | |
3014 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3015 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3016 | struct nfs_lockt_args arg = { |
1da177e4 | 3017 | .fh = NFS_FH(inode), |
911d1aaf | 3018 | .fl = request, |
1da177e4 | 3019 | }; |
911d1aaf TM |
3020 | struct nfs_lockt_res res = { |
3021 | .denied = request, | |
1da177e4 LT |
3022 | }; |
3023 | struct rpc_message msg = { | |
3024 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3025 | .rpc_argp = &arg, | |
3026 | .rpc_resp = &res, | |
3027 | .rpc_cred = state->owner->so_cred, | |
3028 | }; | |
1da177e4 LT |
3029 | struct nfs4_lock_state *lsp; |
3030 | int status; | |
3031 | ||
3032 | down_read(&clp->cl_sem); | |
911d1aaf | 3033 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3034 | status = nfs4_set_lock_state(state, request); |
3035 | if (status != 0) | |
3036 | goto out; | |
3037 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3038 | arg.lock_owner.id = lsp->ls_id.id; |
1da177e4 | 3039 | status = rpc_call_sync(server->client, &msg, 0); |
911d1aaf TM |
3040 | switch (status) { |
3041 | case 0: | |
3042 | request->fl_type = F_UNLCK; | |
3043 | break; | |
3044 | case -NFS4ERR_DENIED: | |
3045 | status = 0; | |
1da177e4 | 3046 | } |
70cc6487 | 3047 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3048 | out: |
1da177e4 LT |
3049 | up_read(&clp->cl_sem); |
3050 | return status; | |
3051 | } | |
3052 | ||
3053 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3054 | { | |
3055 | struct nfs4_exception exception = { }; | |
3056 | int err; | |
3057 | ||
3058 | do { | |
3059 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3060 | _nfs4_proc_getlk(state, cmd, request), | |
3061 | &exception); | |
3062 | } while (exception.retry); | |
3063 | return err; | |
3064 | } | |
3065 | ||
3066 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3067 | { | |
3068 | int res = 0; | |
3069 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3070 | case FL_POSIX: | |
3071 | res = posix_lock_file_wait(file, fl); | |
3072 | break; | |
3073 | case FL_FLOCK: | |
3074 | res = flock_lock_file_wait(file, fl); | |
3075 | break; | |
3076 | default: | |
3077 | BUG(); | |
3078 | } | |
1da177e4 LT |
3079 | return res; |
3080 | } | |
3081 | ||
faf5f49c | 3082 | struct nfs4_unlockdata { |
911d1aaf TM |
3083 | struct nfs_locku_args arg; |
3084 | struct nfs_locku_res res; | |
faf5f49c TM |
3085 | struct nfs4_lock_state *lsp; |
3086 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3087 | struct file_lock fl; |
3088 | const struct nfs_server *server; | |
26e976a8 | 3089 | unsigned long timestamp; |
faf5f49c TM |
3090 | }; |
3091 | ||
911d1aaf TM |
3092 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3093 | struct nfs_open_context *ctx, | |
3094 | struct nfs4_lock_state *lsp, | |
3095 | struct nfs_seqid *seqid) | |
3096 | { | |
3097 | struct nfs4_unlockdata *p; | |
3098 | struct inode *inode = lsp->ls_state->inode; | |
3099 | ||
3100 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3101 | if (p == NULL) | |
3102 | return NULL; | |
3103 | p->arg.fh = NFS_FH(inode); | |
3104 | p->arg.fl = &p->fl; | |
3105 | p->arg.seqid = seqid; | |
3106 | p->arg.stateid = &lsp->ls_stateid; | |
3107 | p->lsp = lsp; | |
3108 | atomic_inc(&lsp->ls_count); | |
3109 | /* Ensure we don't close file until we're done freeing locks! */ | |
3110 | p->ctx = get_nfs_open_context(ctx); | |
3111 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3112 | p->server = NFS_SERVER(inode); | |
3113 | return p; | |
3114 | } | |
3115 | ||
06f814a3 | 3116 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3117 | { |
963d8fe5 | 3118 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3119 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3120 | nfs4_put_lock_state(calldata->lsp); |
3121 | put_nfs_open_context(calldata->ctx); | |
3122 | kfree(calldata); | |
faf5f49c TM |
3123 | } |
3124 | ||
963d8fe5 | 3125 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3126 | { |
963d8fe5 | 3127 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3128 | |
06f814a3 TM |
3129 | if (RPC_ASSASSINATED(task)) |
3130 | return; | |
911d1aaf | 3131 | nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); |
faf5f49c TM |
3132 | switch (task->tk_status) { |
3133 | case 0: | |
3134 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3135 | calldata->res.stateid.data, |
faf5f49c | 3136 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3137 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c TM |
3138 | break; |
3139 | case -NFS4ERR_STALE_STATEID: | |
3140 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3141 | break; |
3142 | default: | |
a6a352e9 | 3143 | if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) |
faf5f49c | 3144 | rpc_restart_call(task); |
faf5f49c | 3145 | } |
faf5f49c TM |
3146 | } |
3147 | ||
4ce70ada | 3148 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3149 | { |
4ce70ada | 3150 | struct nfs4_unlockdata *calldata = data; |
1da177e4 LT |
3151 | struct rpc_message msg = { |
3152 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
faf5f49c TM |
3153 | .rpc_argp = &calldata->arg, |
3154 | .rpc_resp = &calldata->res, | |
3155 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
1da177e4 | 3156 | }; |
faf5f49c | 3157 | |
911d1aaf | 3158 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3159 | return; |
3160 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3161 | /* Note: exit _without_ running nfs4_locku_done */ |
3162 | task->tk_action = NULL; | |
faf5f49c TM |
3163 | return; |
3164 | } | |
26e976a8 | 3165 | calldata->timestamp = jiffies; |
faf5f49c TM |
3166 | rpc_call_setup(task, &msg, 0); |
3167 | } | |
3168 | ||
963d8fe5 | 3169 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3170 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3171 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3172 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3173 | }; |
3174 | ||
a5d16a4d TM |
3175 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3176 | struct nfs_open_context *ctx, | |
3177 | struct nfs4_lock_state *lsp, | |
3178 | struct nfs_seqid *seqid) | |
3179 | { | |
3180 | struct nfs4_unlockdata *data; | |
a5d16a4d TM |
3181 | |
3182 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
3183 | if (data == NULL) { | |
3184 | nfs_free_seqid(seqid); | |
3185 | return ERR_PTR(-ENOMEM); | |
3186 | } | |
3187 | ||
7a1218a2 | 3188 | return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); |
a5d16a4d TM |
3189 | } |
3190 | ||
faf5f49c TM |
3191 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3192 | { | |
911d1aaf | 3193 | struct nfs_seqid *seqid; |
1da177e4 | 3194 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3195 | struct rpc_task *task; |
3196 | int status = 0; | |
faf5f49c | 3197 | |
8d0a8a9d | 3198 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3199 | /* Unlock _before_ we do the RPC call */ |
3200 | request->fl_flags |= FL_EXISTS; | |
3201 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) | |
3202 | goto out; | |
8d0a8a9d | 3203 | if (status != 0) |
9b073574 TM |
3204 | goto out; |
3205 | /* Is this a delegated lock? */ | |
3206 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3207 | goto out; | |
8d0a8a9d | 3208 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3209 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3210 | status = -ENOMEM; |
911d1aaf | 3211 | if (seqid == NULL) |
9b073574 | 3212 | goto out; |
a5d16a4d TM |
3213 | task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); |
3214 | status = PTR_ERR(task); | |
3215 | if (IS_ERR(task)) | |
9b073574 | 3216 | goto out; |
a5d16a4d | 3217 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3218 | rpc_put_task(task); |
9b073574 | 3219 | out: |
1da177e4 LT |
3220 | return status; |
3221 | } | |
3222 | ||
a5d16a4d TM |
3223 | struct nfs4_lockdata { |
3224 | struct nfs_lock_args arg; | |
3225 | struct nfs_lock_res res; | |
3226 | struct nfs4_lock_state *lsp; | |
3227 | struct nfs_open_context *ctx; | |
3228 | struct file_lock fl; | |
26e976a8 | 3229 | unsigned long timestamp; |
a5d16a4d TM |
3230 | int rpc_status; |
3231 | int cancelled; | |
3232 | }; | |
3233 | ||
3234 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3235 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3236 | { |
a5d16a4d TM |
3237 | struct nfs4_lockdata *p; |
3238 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3239 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3240 | |
3241 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3242 | if (p == NULL) | |
3243 | return NULL; | |
3244 | ||
3245 | p->arg.fh = NFS_FH(inode); | |
3246 | p->arg.fl = &p->fl; | |
3247 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3248 | if (p->arg.lock_seqid == NULL) | |
3249 | goto out_free; | |
3250 | p->arg.lock_stateid = &lsp->ls_stateid; | |
7539bbab | 3251 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3252 | p->arg.lock_owner.id = lsp->ls_id.id; |
a5d16a4d TM |
3253 | p->lsp = lsp; |
3254 | atomic_inc(&lsp->ls_count); | |
3255 | p->ctx = get_nfs_open_context(ctx); | |
3256 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3257 | return p; | |
3258 | out_free: | |
3259 | kfree(p); | |
3260 | return NULL; | |
3261 | } | |
3262 | ||
3263 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3264 | { | |
3265 | struct nfs4_lockdata *data = calldata; | |
3266 | struct nfs4_state *state = data->lsp->ls_state; | |
3267 | struct nfs4_state_owner *sp = state->owner; | |
1da177e4 | 3268 | struct rpc_message msg = { |
a5d16a4d TM |
3269 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
3270 | .rpc_argp = &data->arg, | |
3271 | .rpc_resp = &data->res, | |
3272 | .rpc_cred = sp->so_cred, | |
1da177e4 | 3273 | }; |
06735b34 | 3274 | |
a5d16a4d TM |
3275 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3276 | return; | |
3277 | dprintk("%s: begin!\n", __FUNCTION__); | |
3278 | /* Do we need to do an open_to_lock_owner? */ | |
3279 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
3280 | data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); | |
3281 | if (data->arg.open_seqid == NULL) { | |
3282 | data->rpc_status = -ENOMEM; | |
3283 | task->tk_action = NULL; | |
06735b34 | 3284 | goto out; |
8d0a8a9d | 3285 | } |
a5d16a4d TM |
3286 | data->arg.open_stateid = &state->stateid; |
3287 | data->arg.new_lock_owner = 1; | |
3288 | } | |
26e976a8 | 3289 | data->timestamp = jiffies; |
a5d16a4d | 3290 | rpc_call_setup(task, &msg, 0); |
06735b34 | 3291 | out: |
a5d16a4d TM |
3292 | dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); |
3293 | } | |
3294 | ||
3295 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3296 | { | |
3297 | struct nfs4_lockdata *data = calldata; | |
3298 | ||
3299 | dprintk("%s: begin!\n", __FUNCTION__); | |
3300 | ||
3301 | data->rpc_status = task->tk_status; | |
3302 | if (RPC_ASSASSINATED(task)) | |
3303 | goto out; | |
3304 | if (data->arg.new_lock_owner != 0) { | |
3305 | nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); | |
3306 | if (data->rpc_status == 0) | |
3307 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3308 | else | |
3309 | goto out; | |
3310 | } | |
3311 | if (data->rpc_status == 0) { | |
3312 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3313 | sizeof(data->lsp->ls_stateid.data)); | |
3314 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3315 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d TM |
3316 | } |
3317 | nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); | |
3318 | out: | |
3319 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); | |
3320 | } | |
3321 | ||
3322 | static void nfs4_lock_release(void *calldata) | |
3323 | { | |
3324 | struct nfs4_lockdata *data = calldata; | |
3325 | ||
3326 | dprintk("%s: begin!\n", __FUNCTION__); | |
3327 | if (data->arg.open_seqid != NULL) | |
3328 | nfs_free_seqid(data->arg.open_seqid); | |
3329 | if (data->cancelled != 0) { | |
3330 | struct rpc_task *task; | |
3331 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3332 | data->arg.lock_seqid); | |
3333 | if (!IS_ERR(task)) | |
e6b3c4db | 3334 | rpc_put_task(task); |
a5d16a4d TM |
3335 | dprintk("%s: cancelling lock!\n", __FUNCTION__); |
3336 | } else | |
3337 | nfs_free_seqid(data->arg.lock_seqid); | |
3338 | nfs4_put_lock_state(data->lsp); | |
3339 | put_nfs_open_context(data->ctx); | |
3340 | kfree(data); | |
3341 | dprintk("%s: done!\n", __FUNCTION__); | |
3342 | } | |
3343 | ||
3344 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3345 | .rpc_call_prepare = nfs4_lock_prepare, | |
3346 | .rpc_call_done = nfs4_lock_done, | |
3347 | .rpc_release = nfs4_lock_release, | |
3348 | }; | |
3349 | ||
3350 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3351 | { | |
3352 | struct nfs4_lockdata *data; | |
3353 | struct rpc_task *task; | |
3354 | int ret; | |
3355 | ||
3356 | dprintk("%s: begin!\n", __FUNCTION__); | |
3357 | data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, | |
3358 | fl->fl_u.nfs4_fl.owner); | |
3359 | if (data == NULL) | |
3360 | return -ENOMEM; | |
3361 | if (IS_SETLKW(cmd)) | |
3362 | data->arg.block = 1; | |
3363 | if (reclaim != 0) | |
3364 | data->arg.reclaim = 1; | |
3365 | task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, | |
3366 | &nfs4_lock_ops, data); | |
7a1218a2 | 3367 | if (IS_ERR(task)) |
a5d16a4d | 3368 | return PTR_ERR(task); |
a5d16a4d TM |
3369 | ret = nfs4_wait_for_completion_rpc_task(task); |
3370 | if (ret == 0) { | |
3371 | ret = data->rpc_status; | |
3372 | if (ret == -NFS4ERR_DENIED) | |
3373 | ret = -EAGAIN; | |
3374 | } else | |
3375 | data->cancelled = 1; | |
e6b3c4db | 3376 | rpc_put_task(task); |
a5d16a4d TM |
3377 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); |
3378 | return ret; | |
1da177e4 LT |
3379 | } |
3380 | ||
3381 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3382 | { | |
202b50dc TM |
3383 | struct nfs_server *server = NFS_SERVER(state->inode); |
3384 | struct nfs4_exception exception = { }; | |
3385 | int err; | |
3386 | ||
3387 | do { | |
42a2d13e TM |
3388 | /* Cache the lock if possible... */ |
3389 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3390 | return 0; | |
202b50dc TM |
3391 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3392 | if (err != -NFS4ERR_DELAY) | |
3393 | break; | |
3394 | nfs4_handle_exception(server, err, &exception); | |
3395 | } while (exception.retry); | |
3396 | return err; | |
1da177e4 LT |
3397 | } |
3398 | ||
3399 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3400 | { | |
202b50dc TM |
3401 | struct nfs_server *server = NFS_SERVER(state->inode); |
3402 | struct nfs4_exception exception = { }; | |
3403 | int err; | |
3404 | ||
6bfc93ef TM |
3405 | err = nfs4_set_lock_state(state, request); |
3406 | if (err != 0) | |
3407 | return err; | |
202b50dc | 3408 | do { |
42a2d13e TM |
3409 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3410 | return 0; | |
202b50dc TM |
3411 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3412 | if (err != -NFS4ERR_DELAY) | |
3413 | break; | |
3414 | nfs4_handle_exception(server, err, &exception); | |
3415 | } while (exception.retry); | |
3416 | return err; | |
1da177e4 LT |
3417 | } |
3418 | ||
3419 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3420 | { | |
adfa6f98 | 3421 | struct nfs_client *clp = state->owner->so_client; |
01c3b861 | 3422 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3423 | int status; |
3424 | ||
6bfc93ef | 3425 | /* Is this a delegated open? */ |
6bfc93ef TM |
3426 | status = nfs4_set_lock_state(state, request); |
3427 | if (status != 0) | |
3428 | goto out; | |
01c3b861 TM |
3429 | request->fl_flags |= FL_ACCESS; |
3430 | status = do_vfs_lock(request->fl_file, request); | |
3431 | if (status < 0) | |
3432 | goto out; | |
3433 | down_read(&clp->cl_sem); | |
3434 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3435 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
3436 | /* Yes: cache locks! */ | |
3437 | down_read(&nfsi->rwsem); | |
3438 | /* ...but avoid races with delegation recall... */ | |
3439 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3440 | request->fl_flags = fl_flags & ~FL_SLEEP; | |
3441 | status = do_vfs_lock(request->fl_file, request); | |
3442 | up_read(&nfsi->rwsem); | |
3443 | goto out_unlock; | |
3444 | } | |
3445 | up_read(&nfsi->rwsem); | |
3446 | } | |
6bfc93ef TM |
3447 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3448 | if (status != 0) | |
01c3b861 | 3449 | goto out_unlock; |
6bfc93ef | 3450 | /* Note: we always want to sleep here! */ |
01c3b861 | 3451 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef TM |
3452 | if (do_vfs_lock(request->fl_file, request) < 0) |
3453 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
01c3b861 | 3454 | out_unlock: |
1da177e4 | 3455 | up_read(&clp->cl_sem); |
01c3b861 TM |
3456 | out: |
3457 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3458 | return status; |
3459 | } | |
3460 | ||
3461 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3462 | { | |
3463 | struct nfs4_exception exception = { }; | |
3464 | int err; | |
3465 | ||
3466 | do { | |
3467 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3468 | _nfs4_proc_setlk(state, cmd, request), | |
3469 | &exception); | |
3470 | } while (exception.retry); | |
3471 | return err; | |
3472 | } | |
3473 | ||
3474 | static int | |
3475 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3476 | { | |
3477 | struct nfs_open_context *ctx; | |
3478 | struct nfs4_state *state; | |
3479 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3480 | int status; | |
3481 | ||
3482 | /* verify open state */ | |
3483 | ctx = (struct nfs_open_context *)filp->private_data; | |
3484 | state = ctx->state; | |
3485 | ||
3486 | if (request->fl_start < 0 || request->fl_end < 0) | |
3487 | return -EINVAL; | |
3488 | ||
3489 | if (IS_GETLK(cmd)) | |
3490 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3491 | ||
3492 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3493 | return -EINVAL; | |
3494 | ||
3495 | if (request->fl_type == F_UNLCK) | |
3496 | return nfs4_proc_unlck(state, cmd, request); | |
3497 | ||
3498 | do { | |
3499 | status = nfs4_proc_setlk(state, cmd, request); | |
3500 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3501 | break; | |
3502 | timeout = nfs4_set_lock_task_retry(timeout); | |
3503 | status = -ERESTARTSYS; | |
3504 | if (signalled()) | |
3505 | break; | |
3506 | } while(status < 0); | |
1da177e4 LT |
3507 | return status; |
3508 | } | |
3509 | ||
888e694c TM |
3510 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3511 | { | |
3512 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3513 | struct nfs4_exception exception = { }; | |
3514 | int err; | |
3515 | ||
3516 | err = nfs4_set_lock_state(state, fl); | |
3517 | if (err != 0) | |
3518 | goto out; | |
3519 | do { | |
3520 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3521 | if (err != -NFS4ERR_DELAY) | |
3522 | break; | |
3523 | err = nfs4_handle_exception(server, err, &exception); | |
3524 | } while (exception.retry); | |
3525 | out: | |
3526 | return err; | |
3527 | } | |
6b3b5496 | 3528 | |
aa1870af BF |
3529 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3530 | ||
6b3b5496 BF |
3531 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3532 | size_t buflen, int flags) | |
3533 | { | |
4b580ee3 BF |
3534 | struct inode *inode = dentry->d_inode; |
3535 | ||
3536 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3537 | return -EOPNOTSUPP; | |
3538 | ||
3539 | if (!S_ISREG(inode->i_mode) && | |
3540 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3541 | return -EPERM; | |
3542 | ||
3543 | return nfs4_proc_set_acl(inode, buf, buflen); | |
6b3b5496 BF |
3544 | } |
3545 | ||
3546 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3547 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3548 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3549 | * attributes in kernel-managed attribute namespaces. */ | |
3550 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3551 | size_t buflen) | |
3552 | { | |
aa1870af BF |
3553 | struct inode *inode = dentry->d_inode; |
3554 | ||
3555 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3556 | return -EOPNOTSUPP; | |
3557 | ||
3558 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3559 | } |
3560 | ||
3561 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3562 | { | |
aa1870af | 3563 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 3564 | |
096455a2 BF |
3565 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
3566 | return 0; | |
6b3b5496 BF |
3567 | if (buf && buflen < len) |
3568 | return -ERANGE; | |
3569 | if (buf) | |
aa1870af BF |
3570 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3571 | return len; | |
6b3b5496 BF |
3572 | } |
3573 | ||
c228fd3a | 3574 | int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name, |
7aaa0b3b | 3575 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
3576 | { |
3577 | struct nfs_server *server = NFS_SERVER(dir); | |
3578 | u32 bitmask[2] = { | |
361e624f MN |
3579 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
3580 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
3581 | }; |
3582 | struct nfs4_fs_locations_arg args = { | |
3583 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 3584 | .name = name, |
683b57b4 TM |
3585 | .page = page, |
3586 | .bitmask = bitmask, | |
3587 | }; | |
3588 | struct rpc_message msg = { | |
3589 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3590 | .rpc_argp = &args, | |
7aaa0b3b | 3591 | .rpc_resp = fs_locations, |
683b57b4 TM |
3592 | }; |
3593 | int status; | |
3594 | ||
3595 | dprintk("%s: start\n", __FUNCTION__); | |
c228fd3a | 3596 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 3597 | fs_locations->server = server; |
830b8e33 | 3598 | fs_locations->nlocations = 0; |
683b57b4 TM |
3599 | status = rpc_call_sync(server->client, &msg, 0); |
3600 | dprintk("%s: returned status = %d\n", __FUNCTION__, status); | |
3601 | return status; | |
3602 | } | |
3603 | ||
1da177e4 LT |
3604 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
3605 | .recover_open = nfs4_open_reclaim, | |
3606 | .recover_lock = nfs4_lock_reclaim, | |
3607 | }; | |
3608 | ||
3609 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3610 | .recover_open = nfs4_open_expired, | |
3611 | .recover_lock = nfs4_lock_expired, | |
3612 | }; | |
3613 | ||
92e1d5be | 3614 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
3615 | .permission = nfs_permission, |
3616 | .getattr = nfs_getattr, | |
3617 | .setattr = nfs_setattr, | |
3618 | .getxattr = nfs4_getxattr, | |
3619 | .setxattr = nfs4_setxattr, | |
3620 | .listxattr = nfs4_listxattr, | |
3621 | }; | |
3622 | ||
509de811 | 3623 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
3624 | .version = 4, /* protocol version */ |
3625 | .dentry_ops = &nfs4_dentry_operations, | |
3626 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3627 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3628 | .getroot = nfs4_proc_get_root, |
3629 | .getattr = nfs4_proc_getattr, | |
3630 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 3631 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
3632 | .lookup = nfs4_proc_lookup, |
3633 | .access = nfs4_proc_access, | |
3634 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
3635 | .create = nfs4_proc_create, |
3636 | .remove = nfs4_proc_remove, | |
3637 | .unlink_setup = nfs4_proc_unlink_setup, | |
3638 | .unlink_done = nfs4_proc_unlink_done, | |
3639 | .rename = nfs4_proc_rename, | |
3640 | .link = nfs4_proc_link, | |
3641 | .symlink = nfs4_proc_symlink, | |
3642 | .mkdir = nfs4_proc_mkdir, | |
3643 | .rmdir = nfs4_proc_remove, | |
3644 | .readdir = nfs4_proc_readdir, | |
3645 | .mknod = nfs4_proc_mknod, | |
3646 | .statfs = nfs4_proc_statfs, | |
3647 | .fsinfo = nfs4_proc_fsinfo, | |
3648 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 3649 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
3650 | .decode_dirent = nfs4_decode_dirent, |
3651 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 3652 | .read_done = nfs4_read_done, |
1da177e4 | 3653 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 3654 | .write_done = nfs4_write_done, |
1da177e4 | 3655 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 3656 | .commit_done = nfs4_commit_done, |
02a913a7 TM |
3657 | .file_open = nfs_open, |
3658 | .file_release = nfs_release, | |
1da177e4 | 3659 | .lock = nfs4_proc_lock, |
e50a1c2e | 3660 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3661 | }; |
3662 | ||
3663 | /* | |
3664 | * Local variables: | |
3665 | * c-basic-offset: 8 | |
3666 | * End: | |
3667 | */ |