Commit | Line | Data |
---|---|---|
e5e5558e MS |
1 | /* |
2 | FUSE: Filesystem in Userspace | |
3 | Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu> | |
4 | ||
5 | This program can be distributed under the terms of the GNU GPL. | |
6 | See the file COPYING. | |
7 | */ | |
8 | ||
9 | #include "fuse_i.h" | |
10 | ||
11 | #include <linux/pagemap.h> | |
12 | #include <linux/file.h> | |
13 | #include <linux/gfp.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/namei.h> | |
16 | ||
17 | static inline unsigned long time_to_jiffies(unsigned long sec, | |
18 | unsigned long nsec) | |
19 | { | |
20 | struct timespec ts = {sec, nsec}; | |
21 | return jiffies + timespec_to_jiffies(&ts); | |
22 | } | |
23 | ||
0aa7c699 MS |
24 | static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o) |
25 | { | |
0aa7c699 | 26 | entry->d_time = time_to_jiffies(o->entry_valid, o->entry_valid_nsec); |
8cbdf1e6 MS |
27 | if (entry->d_inode) |
28 | get_fuse_inode(entry->d_inode)->i_time = | |
29 | time_to_jiffies(o->attr_valid, o->attr_valid_nsec); | |
30 | } | |
31 | ||
32 | void fuse_invalidate_attr(struct inode *inode) | |
33 | { | |
34 | get_fuse_inode(inode)->i_time = jiffies - 1; | |
35 | } | |
36 | ||
37 | static void fuse_invalidate_entry_cache(struct dentry *entry) | |
38 | { | |
39 | entry->d_time = jiffies - 1; | |
40 | } | |
41 | ||
42 | static void fuse_invalidate_entry(struct dentry *entry) | |
43 | { | |
44 | d_invalidate(entry); | |
45 | fuse_invalidate_entry_cache(entry); | |
0aa7c699 MS |
46 | } |
47 | ||
e5e5558e MS |
48 | static void fuse_lookup_init(struct fuse_req *req, struct inode *dir, |
49 | struct dentry *entry, | |
50 | struct fuse_entry_out *outarg) | |
51 | { | |
52 | req->in.h.opcode = FUSE_LOOKUP; | |
53 | req->in.h.nodeid = get_node_id(dir); | |
54 | req->inode = dir; | |
55 | req->in.numargs = 1; | |
56 | req->in.args[0].size = entry->d_name.len + 1; | |
57 | req->in.args[0].value = entry->d_name.name; | |
58 | req->out.numargs = 1; | |
59 | req->out.args[0].size = sizeof(struct fuse_entry_out); | |
60 | req->out.args[0].value = outarg; | |
61 | } | |
62 | ||
63 | static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) | |
64 | { | |
8cbdf1e6 MS |
65 | struct inode *inode = entry->d_inode; |
66 | ||
67 | if (inode && is_bad_inode(inode)) | |
e5e5558e MS |
68 | return 0; |
69 | else if (time_after(jiffies, entry->d_time)) { | |
70 | int err; | |
e5e5558e | 71 | struct fuse_entry_out outarg; |
8cbdf1e6 MS |
72 | struct fuse_conn *fc; |
73 | struct fuse_req *req; | |
74 | ||
75 | fuse_invalidate_entry_cache(entry); | |
76 | if (!inode) | |
77 | return 0; | |
78 | ||
79 | fc = get_fuse_conn(inode); | |
80 | req = fuse_get_request(fc); | |
e5e5558e MS |
81 | if (!req) |
82 | return 0; | |
83 | ||
84 | fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg); | |
7c352bdf | 85 | request_send(fc, req); |
e5e5558e | 86 | err = req->out.h.error; |
9e6268db | 87 | if (!err) { |
8cbdf1e6 | 88 | struct fuse_inode *fi = get_fuse_inode(inode); |
9e6268db MS |
89 | if (outarg.nodeid != get_node_id(inode)) { |
90 | fuse_send_forget(fc, req, outarg.nodeid, 1); | |
91 | return 0; | |
92 | } | |
93 | fi->nlookup ++; | |
94 | } | |
e5e5558e | 95 | fuse_put_request(fc, req); |
9e6268db | 96 | if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) |
e5e5558e MS |
97 | return 0; |
98 | ||
99 | fuse_change_attributes(inode, &outarg.attr); | |
0aa7c699 | 100 | fuse_change_timeout(entry, &outarg); |
e5e5558e MS |
101 | } |
102 | return 1; | |
103 | } | |
104 | ||
f007d5c9 MS |
105 | static int dir_alias(struct inode *inode) |
106 | { | |
107 | if (S_ISDIR(inode->i_mode)) { | |
108 | /* Don't allow creating an alias to a directory */ | |
109 | struct dentry *alias = d_find_alias(inode); | |
110 | if (alias) { | |
111 | dput(alias); | |
112 | return 1; | |
113 | } | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
2827d0b2 MS |
118 | static inline int invalid_nodeid(u64 nodeid) |
119 | { | |
120 | return !nodeid || nodeid == FUSE_ROOT_ID; | |
121 | } | |
122 | ||
e5e5558e MS |
123 | static struct dentry_operations fuse_dentry_operations = { |
124 | .d_revalidate = fuse_dentry_revalidate, | |
125 | }; | |
126 | ||
0aa7c699 MS |
127 | static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, |
128 | struct nameidata *nd) | |
e5e5558e MS |
129 | { |
130 | int err; | |
e5e5558e MS |
131 | struct fuse_entry_out outarg; |
132 | struct inode *inode = NULL; | |
133 | struct fuse_conn *fc = get_fuse_conn(dir); | |
134 | struct fuse_req *req; | |
135 | ||
136 | if (entry->d_name.len > FUSE_NAME_MAX) | |
0aa7c699 | 137 | return ERR_PTR(-ENAMETOOLONG); |
e5e5558e MS |
138 | |
139 | req = fuse_get_request(fc); | |
140 | if (!req) | |
0aa7c699 | 141 | return ERR_PTR(-EINTR); |
e5e5558e MS |
142 | |
143 | fuse_lookup_init(req, dir, entry, &outarg); | |
144 | request_send(fc, req); | |
e5e5558e | 145 | err = req->out.h.error; |
8cbdf1e6 | 146 | if (!err && outarg.nodeid && invalid_nodeid(outarg.nodeid)) |
ee4e5271 | 147 | err = -EIO; |
8cbdf1e6 | 148 | if (!err && outarg.nodeid) { |
e5e5558e | 149 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, |
9e6268db | 150 | &outarg.attr); |
e5e5558e | 151 | if (!inode) { |
9e6268db | 152 | fuse_send_forget(fc, req, outarg.nodeid, 1); |
0aa7c699 | 153 | return ERR_PTR(-ENOMEM); |
e5e5558e MS |
154 | } |
155 | } | |
156 | fuse_put_request(fc, req); | |
157 | if (err && err != -ENOENT) | |
0aa7c699 | 158 | return ERR_PTR(err); |
e5e5558e | 159 | |
0aa7c699 MS |
160 | if (inode && dir_alias(inode)) { |
161 | iput(inode); | |
162 | return ERR_PTR(-EIO); | |
e5e5558e | 163 | } |
0aa7c699 | 164 | d_add(entry, inode); |
e5e5558e | 165 | entry->d_op = &fuse_dentry_operations; |
8cbdf1e6 | 166 | if (!err) |
0aa7c699 | 167 | fuse_change_timeout(entry, &outarg); |
8cbdf1e6 MS |
168 | else |
169 | fuse_invalidate_entry_cache(entry); | |
0aa7c699 | 170 | return NULL; |
e5e5558e MS |
171 | } |
172 | ||
fd72faac MS |
173 | static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, |
174 | struct nameidata *nd) | |
175 | { | |
176 | int err; | |
177 | struct inode *inode; | |
178 | struct fuse_conn *fc = get_fuse_conn(dir); | |
179 | struct fuse_req *req; | |
180 | struct fuse_open_in inarg; | |
181 | struct fuse_open_out outopen; | |
182 | struct fuse_entry_out outentry; | |
fd72faac MS |
183 | struct fuse_file *ff; |
184 | struct file *file; | |
185 | int flags = nd->intent.open.flags - 1; | |
186 | ||
187 | err = -ENOSYS; | |
188 | if (fc->no_create) | |
189 | goto out; | |
190 | ||
191 | err = -ENAMETOOLONG; | |
192 | if (entry->d_name.len > FUSE_NAME_MAX) | |
193 | goto out; | |
194 | ||
195 | err = -EINTR; | |
196 | req = fuse_get_request(fc); | |
197 | if (!req) | |
198 | goto out; | |
199 | ||
200 | ff = fuse_file_alloc(); | |
201 | if (!ff) | |
202 | goto out_put_request; | |
203 | ||
204 | flags &= ~O_NOCTTY; | |
205 | memset(&inarg, 0, sizeof(inarg)); | |
206 | inarg.flags = flags; | |
207 | inarg.mode = mode; | |
208 | req->in.h.opcode = FUSE_CREATE; | |
209 | req->in.h.nodeid = get_node_id(dir); | |
210 | req->inode = dir; | |
211 | req->in.numargs = 2; | |
212 | req->in.args[0].size = sizeof(inarg); | |
213 | req->in.args[0].value = &inarg; | |
214 | req->in.args[1].size = entry->d_name.len + 1; | |
215 | req->in.args[1].value = entry->d_name.name; | |
216 | req->out.numargs = 2; | |
217 | req->out.args[0].size = sizeof(outentry); | |
218 | req->out.args[0].value = &outentry; | |
219 | req->out.args[1].size = sizeof(outopen); | |
220 | req->out.args[1].value = &outopen; | |
221 | request_send(fc, req); | |
222 | err = req->out.h.error; | |
223 | if (err) { | |
224 | if (err == -ENOSYS) | |
225 | fc->no_create = 1; | |
226 | goto out_free_ff; | |
227 | } | |
228 | ||
229 | err = -EIO; | |
2827d0b2 | 230 | if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid)) |
fd72faac MS |
231 | goto out_free_ff; |
232 | ||
233 | inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, | |
234 | &outentry.attr); | |
235 | err = -ENOMEM; | |
236 | if (!inode) { | |
237 | flags &= ~(O_CREAT | O_EXCL | O_TRUNC); | |
238 | ff->fh = outopen.fh; | |
239 | fuse_send_release(fc, ff, outentry.nodeid, NULL, flags, 0); | |
240 | goto out_put_request; | |
241 | } | |
242 | fuse_put_request(fc, req); | |
fd72faac | 243 | d_instantiate(entry, inode); |
0aa7c699 | 244 | fuse_change_timeout(entry, &outentry); |
fd72faac MS |
245 | file = lookup_instantiate_filp(nd, entry, generic_file_open); |
246 | if (IS_ERR(file)) { | |
247 | ff->fh = outopen.fh; | |
248 | fuse_send_release(fc, ff, outentry.nodeid, inode, flags, 0); | |
249 | return PTR_ERR(file); | |
250 | } | |
251 | fuse_finish_open(inode, file, ff, &outopen); | |
252 | return 0; | |
253 | ||
254 | out_free_ff: | |
255 | fuse_file_free(ff); | |
256 | out_put_request: | |
257 | fuse_put_request(fc, req); | |
258 | out: | |
259 | return err; | |
260 | } | |
261 | ||
9e6268db MS |
262 | static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, |
263 | struct inode *dir, struct dentry *entry, | |
264 | int mode) | |
265 | { | |
266 | struct fuse_entry_out outarg; | |
267 | struct inode *inode; | |
9e6268db MS |
268 | int err; |
269 | ||
270 | req->in.h.nodeid = get_node_id(dir); | |
271 | req->inode = dir; | |
272 | req->out.numargs = 1; | |
273 | req->out.args[0].size = sizeof(outarg); | |
274 | req->out.args[0].value = &outarg; | |
275 | request_send(fc, req); | |
276 | err = req->out.h.error; | |
277 | if (err) { | |
278 | fuse_put_request(fc, req); | |
279 | return err; | |
280 | } | |
2827d0b2 | 281 | if (invalid_nodeid(outarg.nodeid)) { |
ee4e5271 MS |
282 | fuse_put_request(fc, req); |
283 | return -EIO; | |
284 | } | |
9e6268db MS |
285 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, |
286 | &outarg.attr); | |
287 | if (!inode) { | |
288 | fuse_send_forget(fc, req, outarg.nodeid, 1); | |
289 | return -ENOMEM; | |
290 | } | |
291 | fuse_put_request(fc, req); | |
292 | ||
293 | /* Don't allow userspace to do really stupid things... */ | |
f007d5c9 | 294 | if (((inode->i_mode ^ mode) & S_IFMT) || dir_alias(inode)) { |
9e6268db MS |
295 | iput(inode); |
296 | return -EIO; | |
297 | } | |
298 | ||
9e6268db | 299 | d_instantiate(entry, inode); |
0aa7c699 | 300 | fuse_change_timeout(entry, &outarg); |
9e6268db MS |
301 | fuse_invalidate_attr(dir); |
302 | return 0; | |
303 | } | |
304 | ||
305 | static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, | |
306 | dev_t rdev) | |
307 | { | |
308 | struct fuse_mknod_in inarg; | |
309 | struct fuse_conn *fc = get_fuse_conn(dir); | |
310 | struct fuse_req *req = fuse_get_request(fc); | |
311 | if (!req) | |
7c352bdf | 312 | return -EINTR; |
9e6268db MS |
313 | |
314 | memset(&inarg, 0, sizeof(inarg)); | |
315 | inarg.mode = mode; | |
316 | inarg.rdev = new_encode_dev(rdev); | |
317 | req->in.h.opcode = FUSE_MKNOD; | |
318 | req->in.numargs = 2; | |
319 | req->in.args[0].size = sizeof(inarg); | |
320 | req->in.args[0].value = &inarg; | |
321 | req->in.args[1].size = entry->d_name.len + 1; | |
322 | req->in.args[1].value = entry->d_name.name; | |
323 | return create_new_entry(fc, req, dir, entry, mode); | |
324 | } | |
325 | ||
326 | static int fuse_create(struct inode *dir, struct dentry *entry, int mode, | |
327 | struct nameidata *nd) | |
328 | { | |
fd72faac MS |
329 | if (nd && (nd->flags & LOOKUP_CREATE)) { |
330 | int err = fuse_create_open(dir, entry, mode, nd); | |
331 | if (err != -ENOSYS) | |
332 | return err; | |
333 | /* Fall back on mknod */ | |
334 | } | |
9e6268db MS |
335 | return fuse_mknod(dir, entry, mode, 0); |
336 | } | |
337 | ||
338 | static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) | |
339 | { | |
340 | struct fuse_mkdir_in inarg; | |
341 | struct fuse_conn *fc = get_fuse_conn(dir); | |
342 | struct fuse_req *req = fuse_get_request(fc); | |
343 | if (!req) | |
7c352bdf | 344 | return -EINTR; |
9e6268db MS |
345 | |
346 | memset(&inarg, 0, sizeof(inarg)); | |
347 | inarg.mode = mode; | |
348 | req->in.h.opcode = FUSE_MKDIR; | |
349 | req->in.numargs = 2; | |
350 | req->in.args[0].size = sizeof(inarg); | |
351 | req->in.args[0].value = &inarg; | |
352 | req->in.args[1].size = entry->d_name.len + 1; | |
353 | req->in.args[1].value = entry->d_name.name; | |
354 | return create_new_entry(fc, req, dir, entry, S_IFDIR); | |
355 | } | |
356 | ||
357 | static int fuse_symlink(struct inode *dir, struct dentry *entry, | |
358 | const char *link) | |
359 | { | |
360 | struct fuse_conn *fc = get_fuse_conn(dir); | |
361 | unsigned len = strlen(link) + 1; | |
362 | struct fuse_req *req; | |
363 | ||
364 | if (len > FUSE_SYMLINK_MAX) | |
365 | return -ENAMETOOLONG; | |
366 | ||
367 | req = fuse_get_request(fc); | |
368 | if (!req) | |
7c352bdf | 369 | return -EINTR; |
9e6268db MS |
370 | |
371 | req->in.h.opcode = FUSE_SYMLINK; | |
372 | req->in.numargs = 2; | |
373 | req->in.args[0].size = entry->d_name.len + 1; | |
374 | req->in.args[0].value = entry->d_name.name; | |
375 | req->in.args[1].size = len; | |
376 | req->in.args[1].value = link; | |
377 | return create_new_entry(fc, req, dir, entry, S_IFLNK); | |
378 | } | |
379 | ||
380 | static int fuse_unlink(struct inode *dir, struct dentry *entry) | |
381 | { | |
382 | int err; | |
383 | struct fuse_conn *fc = get_fuse_conn(dir); | |
384 | struct fuse_req *req = fuse_get_request(fc); | |
385 | if (!req) | |
7c352bdf | 386 | return -EINTR; |
9e6268db MS |
387 | |
388 | req->in.h.opcode = FUSE_UNLINK; | |
389 | req->in.h.nodeid = get_node_id(dir); | |
390 | req->inode = dir; | |
391 | req->in.numargs = 1; | |
392 | req->in.args[0].size = entry->d_name.len + 1; | |
393 | req->in.args[0].value = entry->d_name.name; | |
394 | request_send(fc, req); | |
395 | err = req->out.h.error; | |
396 | fuse_put_request(fc, req); | |
397 | if (!err) { | |
398 | struct inode *inode = entry->d_inode; | |
399 | ||
400 | /* Set nlink to zero so the inode can be cleared, if | |
401 | the inode does have more links this will be | |
402 | discovered at the next lookup/getattr */ | |
403 | inode->i_nlink = 0; | |
404 | fuse_invalidate_attr(inode); | |
405 | fuse_invalidate_attr(dir); | |
8cbdf1e6 | 406 | fuse_invalidate_entry_cache(entry); |
9e6268db MS |
407 | } else if (err == -EINTR) |
408 | fuse_invalidate_entry(entry); | |
409 | return err; | |
410 | } | |
411 | ||
412 | static int fuse_rmdir(struct inode *dir, struct dentry *entry) | |
413 | { | |
414 | int err; | |
415 | struct fuse_conn *fc = get_fuse_conn(dir); | |
416 | struct fuse_req *req = fuse_get_request(fc); | |
417 | if (!req) | |
7c352bdf | 418 | return -EINTR; |
9e6268db MS |
419 | |
420 | req->in.h.opcode = FUSE_RMDIR; | |
421 | req->in.h.nodeid = get_node_id(dir); | |
422 | req->inode = dir; | |
423 | req->in.numargs = 1; | |
424 | req->in.args[0].size = entry->d_name.len + 1; | |
425 | req->in.args[0].value = entry->d_name.name; | |
426 | request_send(fc, req); | |
427 | err = req->out.h.error; | |
428 | fuse_put_request(fc, req); | |
429 | if (!err) { | |
430 | entry->d_inode->i_nlink = 0; | |
431 | fuse_invalidate_attr(dir); | |
8cbdf1e6 | 432 | fuse_invalidate_entry_cache(entry); |
9e6268db MS |
433 | } else if (err == -EINTR) |
434 | fuse_invalidate_entry(entry); | |
435 | return err; | |
436 | } | |
437 | ||
438 | static int fuse_rename(struct inode *olddir, struct dentry *oldent, | |
439 | struct inode *newdir, struct dentry *newent) | |
440 | { | |
441 | int err; | |
442 | struct fuse_rename_in inarg; | |
443 | struct fuse_conn *fc = get_fuse_conn(olddir); | |
444 | struct fuse_req *req = fuse_get_request(fc); | |
445 | if (!req) | |
7c352bdf | 446 | return -EINTR; |
9e6268db MS |
447 | |
448 | memset(&inarg, 0, sizeof(inarg)); | |
449 | inarg.newdir = get_node_id(newdir); | |
450 | req->in.h.opcode = FUSE_RENAME; | |
451 | req->in.h.nodeid = get_node_id(olddir); | |
452 | req->inode = olddir; | |
453 | req->inode2 = newdir; | |
454 | req->in.numargs = 3; | |
455 | req->in.args[0].size = sizeof(inarg); | |
456 | req->in.args[0].value = &inarg; | |
457 | req->in.args[1].size = oldent->d_name.len + 1; | |
458 | req->in.args[1].value = oldent->d_name.name; | |
459 | req->in.args[2].size = newent->d_name.len + 1; | |
460 | req->in.args[2].value = newent->d_name.name; | |
461 | request_send(fc, req); | |
462 | err = req->out.h.error; | |
463 | fuse_put_request(fc, req); | |
464 | if (!err) { | |
465 | fuse_invalidate_attr(olddir); | |
466 | if (olddir != newdir) | |
467 | fuse_invalidate_attr(newdir); | |
8cbdf1e6 MS |
468 | |
469 | /* newent will end up negative */ | |
470 | if (newent->d_inode) | |
471 | fuse_invalidate_entry_cache(newent); | |
9e6268db MS |
472 | } else if (err == -EINTR) { |
473 | /* If request was interrupted, DEITY only knows if the | |
474 | rename actually took place. If the invalidation | |
475 | fails (e.g. some process has CWD under the renamed | |
476 | directory), then there can be inconsistency between | |
477 | the dcache and the real filesystem. Tough luck. */ | |
478 | fuse_invalidate_entry(oldent); | |
479 | if (newent->d_inode) | |
480 | fuse_invalidate_entry(newent); | |
481 | } | |
482 | ||
483 | return err; | |
484 | } | |
485 | ||
486 | static int fuse_link(struct dentry *entry, struct inode *newdir, | |
487 | struct dentry *newent) | |
488 | { | |
489 | int err; | |
490 | struct fuse_link_in inarg; | |
491 | struct inode *inode = entry->d_inode; | |
492 | struct fuse_conn *fc = get_fuse_conn(inode); | |
493 | struct fuse_req *req = fuse_get_request(fc); | |
494 | if (!req) | |
7c352bdf | 495 | return -EINTR; |
9e6268db MS |
496 | |
497 | memset(&inarg, 0, sizeof(inarg)); | |
498 | inarg.oldnodeid = get_node_id(inode); | |
499 | req->in.h.opcode = FUSE_LINK; | |
500 | req->inode2 = inode; | |
501 | req->in.numargs = 2; | |
502 | req->in.args[0].size = sizeof(inarg); | |
503 | req->in.args[0].value = &inarg; | |
504 | req->in.args[1].size = newent->d_name.len + 1; | |
505 | req->in.args[1].value = newent->d_name.name; | |
506 | err = create_new_entry(fc, req, newdir, newent, inode->i_mode); | |
507 | /* Contrary to "normal" filesystems it can happen that link | |
508 | makes two "logical" inodes point to the same "physical" | |
509 | inode. We invalidate the attributes of the old one, so it | |
510 | will reflect changes in the backing inode (link count, | |
511 | etc.) | |
512 | */ | |
513 | if (!err || err == -EINTR) | |
514 | fuse_invalidate_attr(inode); | |
515 | return err; | |
516 | } | |
517 | ||
e5e5558e MS |
518 | int fuse_do_getattr(struct inode *inode) |
519 | { | |
520 | int err; | |
521 | struct fuse_attr_out arg; | |
522 | struct fuse_conn *fc = get_fuse_conn(inode); | |
523 | struct fuse_req *req = fuse_get_request(fc); | |
524 | if (!req) | |
7c352bdf | 525 | return -EINTR; |
e5e5558e MS |
526 | |
527 | req->in.h.opcode = FUSE_GETATTR; | |
528 | req->in.h.nodeid = get_node_id(inode); | |
529 | req->inode = inode; | |
530 | req->out.numargs = 1; | |
531 | req->out.args[0].size = sizeof(arg); | |
532 | req->out.args[0].value = &arg; | |
533 | request_send(fc, req); | |
534 | err = req->out.h.error; | |
535 | fuse_put_request(fc, req); | |
536 | if (!err) { | |
537 | if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) { | |
538 | make_bad_inode(inode); | |
539 | err = -EIO; | |
540 | } else { | |
541 | struct fuse_inode *fi = get_fuse_inode(inode); | |
542 | fuse_change_attributes(inode, &arg.attr); | |
543 | fi->i_time = time_to_jiffies(arg.attr_valid, | |
544 | arg.attr_valid_nsec); | |
545 | } | |
546 | } | |
547 | return err; | |
548 | } | |
549 | ||
87729a55 MS |
550 | /* |
551 | * Calling into a user-controlled filesystem gives the filesystem | |
552 | * daemon ptrace-like capabilities over the requester process. This | |
553 | * means, that the filesystem daemon is able to record the exact | |
554 | * filesystem operations performed, and can also control the behavior | |
555 | * of the requester process in otherwise impossible ways. For example | |
556 | * it can delay the operation for arbitrary length of time allowing | |
557 | * DoS against the requester. | |
558 | * | |
559 | * For this reason only those processes can call into the filesystem, | |
560 | * for which the owner of the mount has ptrace privilege. This | |
561 | * excludes processes started by other users, suid or sgid processes. | |
562 | */ | |
563 | static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task) | |
564 | { | |
565 | if (fc->flags & FUSE_ALLOW_OTHER) | |
566 | return 1; | |
567 | ||
568 | if (task->euid == fc->user_id && | |
569 | task->suid == fc->user_id && | |
570 | task->uid == fc->user_id && | |
571 | task->egid == fc->group_id && | |
572 | task->sgid == fc->group_id && | |
573 | task->gid == fc->group_id) | |
574 | return 1; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
e5e5558e MS |
579 | static int fuse_revalidate(struct dentry *entry) |
580 | { | |
581 | struct inode *inode = entry->d_inode; | |
582 | struct fuse_inode *fi = get_fuse_inode(inode); | |
583 | struct fuse_conn *fc = get_fuse_conn(inode); | |
584 | ||
87729a55 MS |
585 | if (!fuse_allow_task(fc, current)) |
586 | return -EACCES; | |
587 | if (get_node_id(inode) != FUSE_ROOT_ID && | |
588 | time_before_eq(jiffies, fi->i_time)) | |
e5e5558e MS |
589 | return 0; |
590 | ||
591 | return fuse_do_getattr(inode); | |
592 | } | |
593 | ||
31d40d74 MS |
594 | static int fuse_access(struct inode *inode, int mask) |
595 | { | |
596 | struct fuse_conn *fc = get_fuse_conn(inode); | |
597 | struct fuse_req *req; | |
598 | struct fuse_access_in inarg; | |
599 | int err; | |
600 | ||
601 | if (fc->no_access) | |
602 | return 0; | |
603 | ||
604 | req = fuse_get_request(fc); | |
605 | if (!req) | |
606 | return -EINTR; | |
607 | ||
608 | memset(&inarg, 0, sizeof(inarg)); | |
609 | inarg.mask = mask; | |
610 | req->in.h.opcode = FUSE_ACCESS; | |
611 | req->in.h.nodeid = get_node_id(inode); | |
612 | req->inode = inode; | |
613 | req->in.numargs = 1; | |
614 | req->in.args[0].size = sizeof(inarg); | |
615 | req->in.args[0].value = &inarg; | |
616 | request_send(fc, req); | |
617 | err = req->out.h.error; | |
618 | fuse_put_request(fc, req); | |
619 | if (err == -ENOSYS) { | |
620 | fc->no_access = 1; | |
621 | err = 0; | |
622 | } | |
623 | return err; | |
624 | } | |
625 | ||
e5e5558e MS |
626 | static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd) |
627 | { | |
628 | struct fuse_conn *fc = get_fuse_conn(inode); | |
629 | ||
87729a55 | 630 | if (!fuse_allow_task(fc, current)) |
e5e5558e | 631 | return -EACCES; |
1e9a4ed9 MS |
632 | else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
633 | int err = generic_permission(inode, mask, NULL); | |
634 | ||
635 | /* If permission is denied, try to refresh file | |
636 | attributes. This is also needed, because the root | |
637 | node will at first have no permissions */ | |
638 | if (err == -EACCES) { | |
639 | err = fuse_do_getattr(inode); | |
640 | if (!err) | |
641 | err = generic_permission(inode, mask, NULL); | |
642 | } | |
643 | ||
644 | /* FIXME: Need some mechanism to revoke permissions: | |
645 | currently if the filesystem suddenly changes the | |
646 | file mode, we will not be informed about it, and | |
647 | continue to allow access to the file/directory. | |
648 | ||
649 | This is actually not so grave, since the user can | |
650 | simply keep access to the file/directory anyway by | |
651 | keeping it open... */ | |
652 | ||
653 | return err; | |
654 | } else { | |
e5e5558e | 655 | int mode = inode->i_mode; |
e5e5558e MS |
656 | if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO)) |
657 | return -EACCES; | |
31d40d74 MS |
658 | |
659 | if (nd && (nd->flags & LOOKUP_ACCESS)) | |
660 | return fuse_access(inode, mask); | |
e5e5558e MS |
661 | return 0; |
662 | } | |
663 | } | |
664 | ||
665 | static int parse_dirfile(char *buf, size_t nbytes, struct file *file, | |
666 | void *dstbuf, filldir_t filldir) | |
667 | { | |
668 | while (nbytes >= FUSE_NAME_OFFSET) { | |
669 | struct fuse_dirent *dirent = (struct fuse_dirent *) buf; | |
670 | size_t reclen = FUSE_DIRENT_SIZE(dirent); | |
671 | int over; | |
672 | if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX) | |
673 | return -EIO; | |
674 | if (reclen > nbytes) | |
675 | break; | |
676 | ||
677 | over = filldir(dstbuf, dirent->name, dirent->namelen, | |
678 | file->f_pos, dirent->ino, dirent->type); | |
679 | if (over) | |
680 | break; | |
681 | ||
682 | buf += reclen; | |
683 | nbytes -= reclen; | |
684 | file->f_pos = dirent->off; | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
04730fef MS |
690 | static inline size_t fuse_send_readdir(struct fuse_req *req, struct file *file, |
691 | struct inode *inode, loff_t pos, | |
692 | size_t count) | |
e5e5558e | 693 | { |
04730fef | 694 | return fuse_send_read_common(req, file, inode, pos, count, 1); |
e5e5558e MS |
695 | } |
696 | ||
04730fef | 697 | static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) |
e5e5558e | 698 | { |
04730fef MS |
699 | int err; |
700 | size_t nbytes; | |
701 | struct page *page; | |
e5e5558e MS |
702 | struct inode *inode = file->f_dentry->d_inode; |
703 | struct fuse_conn *fc = get_fuse_conn(inode); | |
7c352bdf | 704 | struct fuse_req *req = fuse_get_request(fc); |
e5e5558e | 705 | if (!req) |
04730fef | 706 | return -EINTR; |
e5e5558e | 707 | |
04730fef MS |
708 | page = alloc_page(GFP_KERNEL); |
709 | if (!page) { | |
710 | fuse_put_request(fc, req); | |
711 | return -ENOMEM; | |
712 | } | |
713 | req->num_pages = 1; | |
714 | req->pages[0] = page; | |
715 | nbytes = fuse_send_readdir(req, file, inode, file->f_pos, PAGE_SIZE); | |
e5e5558e MS |
716 | err = req->out.h.error; |
717 | fuse_put_request(fc, req); | |
718 | if (!err) | |
04730fef MS |
719 | err = parse_dirfile(page_address(page), nbytes, file, dstbuf, |
720 | filldir); | |
e5e5558e | 721 | |
04730fef | 722 | __free_page(page); |
b36c31ba | 723 | fuse_invalidate_attr(inode); /* atime changed */ |
04730fef | 724 | return err; |
e5e5558e MS |
725 | } |
726 | ||
727 | static char *read_link(struct dentry *dentry) | |
728 | { | |
729 | struct inode *inode = dentry->d_inode; | |
730 | struct fuse_conn *fc = get_fuse_conn(inode); | |
731 | struct fuse_req *req = fuse_get_request(fc); | |
732 | char *link; | |
733 | ||
734 | if (!req) | |
7c352bdf | 735 | return ERR_PTR(-EINTR); |
e5e5558e MS |
736 | |
737 | link = (char *) __get_free_page(GFP_KERNEL); | |
738 | if (!link) { | |
739 | link = ERR_PTR(-ENOMEM); | |
740 | goto out; | |
741 | } | |
742 | req->in.h.opcode = FUSE_READLINK; | |
743 | req->in.h.nodeid = get_node_id(inode); | |
744 | req->inode = inode; | |
745 | req->out.argvar = 1; | |
746 | req->out.numargs = 1; | |
747 | req->out.args[0].size = PAGE_SIZE - 1; | |
748 | req->out.args[0].value = link; | |
749 | request_send(fc, req); | |
750 | if (req->out.h.error) { | |
751 | free_page((unsigned long) link); | |
752 | link = ERR_PTR(req->out.h.error); | |
753 | } else | |
754 | link[req->out.args[0].size] = '\0'; | |
755 | out: | |
756 | fuse_put_request(fc, req); | |
b36c31ba | 757 | fuse_invalidate_attr(inode); /* atime changed */ |
e5e5558e MS |
758 | return link; |
759 | } | |
760 | ||
761 | static void free_link(char *link) | |
762 | { | |
763 | if (!IS_ERR(link)) | |
764 | free_page((unsigned long) link); | |
765 | } | |
766 | ||
767 | static void *fuse_follow_link(struct dentry *dentry, struct nameidata *nd) | |
768 | { | |
769 | nd_set_link(nd, read_link(dentry)); | |
770 | return NULL; | |
771 | } | |
772 | ||
773 | static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c) | |
774 | { | |
775 | free_link(nd_get_link(nd)); | |
776 | } | |
777 | ||
778 | static int fuse_dir_open(struct inode *inode, struct file *file) | |
779 | { | |
04730fef | 780 | return fuse_open_common(inode, file, 1); |
e5e5558e MS |
781 | } |
782 | ||
783 | static int fuse_dir_release(struct inode *inode, struct file *file) | |
784 | { | |
04730fef | 785 | return fuse_release_common(inode, file, 1); |
e5e5558e MS |
786 | } |
787 | ||
82547981 MS |
788 | static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync) |
789 | { | |
790 | /* nfsd can call this with no file */ | |
791 | return file ? fuse_fsync_common(file, de, datasync, 1) : 0; | |
792 | } | |
793 | ||
befc649c | 794 | static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg) |
9e6268db MS |
795 | { |
796 | unsigned ivalid = iattr->ia_valid; | |
9e6268db MS |
797 | |
798 | if (ivalid & ATTR_MODE) | |
befc649c | 799 | arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode; |
9e6268db | 800 | if (ivalid & ATTR_UID) |
befc649c | 801 | arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid; |
9e6268db | 802 | if (ivalid & ATTR_GID) |
befc649c | 803 | arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid; |
9e6268db | 804 | if (ivalid & ATTR_SIZE) |
befc649c | 805 | arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size; |
9e6268db MS |
806 | /* You can only _set_ these together (they may change by themselves) */ |
807 | if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) { | |
befc649c MS |
808 | arg->valid |= FATTR_ATIME | FATTR_MTIME; |
809 | arg->atime = iattr->ia_atime.tv_sec; | |
810 | arg->mtime = iattr->ia_mtime.tv_sec; | |
811 | } | |
812 | if (ivalid & ATTR_FILE) { | |
813 | struct fuse_file *ff = iattr->ia_file->private_data; | |
814 | arg->valid |= FATTR_FH; | |
815 | arg->fh = ff->fh; | |
9e6268db | 816 | } |
9e6268db MS |
817 | } |
818 | ||
819 | static int fuse_setattr(struct dentry *entry, struct iattr *attr) | |
820 | { | |
821 | struct inode *inode = entry->d_inode; | |
822 | struct fuse_conn *fc = get_fuse_conn(inode); | |
823 | struct fuse_inode *fi = get_fuse_inode(inode); | |
824 | struct fuse_req *req; | |
825 | struct fuse_setattr_in inarg; | |
826 | struct fuse_attr_out outarg; | |
827 | int err; | |
828 | int is_truncate = 0; | |
829 | ||
1e9a4ed9 MS |
830 | if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
831 | err = inode_change_ok(inode, attr); | |
832 | if (err) | |
833 | return err; | |
834 | } | |
835 | ||
9e6268db MS |
836 | if (attr->ia_valid & ATTR_SIZE) { |
837 | unsigned long limit; | |
838 | is_truncate = 1; | |
839 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
840 | if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) { | |
841 | send_sig(SIGXFSZ, current, 0); | |
842 | return -EFBIG; | |
843 | } | |
844 | } | |
845 | ||
846 | req = fuse_get_request(fc); | |
847 | if (!req) | |
7c352bdf | 848 | return -EINTR; |
9e6268db MS |
849 | |
850 | memset(&inarg, 0, sizeof(inarg)); | |
befc649c | 851 | iattr_to_fattr(attr, &inarg); |
9e6268db MS |
852 | req->in.h.opcode = FUSE_SETATTR; |
853 | req->in.h.nodeid = get_node_id(inode); | |
854 | req->inode = inode; | |
855 | req->in.numargs = 1; | |
856 | req->in.args[0].size = sizeof(inarg); | |
857 | req->in.args[0].value = &inarg; | |
858 | req->out.numargs = 1; | |
859 | req->out.args[0].size = sizeof(outarg); | |
860 | req->out.args[0].value = &outarg; | |
861 | request_send(fc, req); | |
862 | err = req->out.h.error; | |
863 | fuse_put_request(fc, req); | |
864 | if (!err) { | |
865 | if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) { | |
866 | make_bad_inode(inode); | |
867 | err = -EIO; | |
868 | } else { | |
869 | if (is_truncate) { | |
870 | loff_t origsize = i_size_read(inode); | |
871 | i_size_write(inode, outarg.attr.size); | |
872 | if (origsize > outarg.attr.size) | |
873 | vmtruncate(inode, outarg.attr.size); | |
874 | } | |
875 | fuse_change_attributes(inode, &outarg.attr); | |
876 | fi->i_time = time_to_jiffies(outarg.attr_valid, | |
877 | outarg.attr_valid_nsec); | |
878 | } | |
879 | } else if (err == -EINTR) | |
880 | fuse_invalidate_attr(inode); | |
881 | ||
882 | return err; | |
883 | } | |
884 | ||
e5e5558e MS |
885 | static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, |
886 | struct kstat *stat) | |
887 | { | |
888 | struct inode *inode = entry->d_inode; | |
889 | int err = fuse_revalidate(entry); | |
890 | if (!err) | |
891 | generic_fillattr(inode, stat); | |
892 | ||
893 | return err; | |
894 | } | |
895 | ||
92a8780e MS |
896 | static int fuse_setxattr(struct dentry *entry, const char *name, |
897 | const void *value, size_t size, int flags) | |
898 | { | |
899 | struct inode *inode = entry->d_inode; | |
900 | struct fuse_conn *fc = get_fuse_conn(inode); | |
901 | struct fuse_req *req; | |
902 | struct fuse_setxattr_in inarg; | |
903 | int err; | |
904 | ||
905 | if (size > FUSE_XATTR_SIZE_MAX) | |
906 | return -E2BIG; | |
907 | ||
908 | if (fc->no_setxattr) | |
909 | return -EOPNOTSUPP; | |
910 | ||
911 | req = fuse_get_request(fc); | |
912 | if (!req) | |
7c352bdf | 913 | return -EINTR; |
92a8780e MS |
914 | |
915 | memset(&inarg, 0, sizeof(inarg)); | |
916 | inarg.size = size; | |
917 | inarg.flags = flags; | |
918 | req->in.h.opcode = FUSE_SETXATTR; | |
919 | req->in.h.nodeid = get_node_id(inode); | |
920 | req->inode = inode; | |
921 | req->in.numargs = 3; | |
922 | req->in.args[0].size = sizeof(inarg); | |
923 | req->in.args[0].value = &inarg; | |
924 | req->in.args[1].size = strlen(name) + 1; | |
925 | req->in.args[1].value = name; | |
926 | req->in.args[2].size = size; | |
927 | req->in.args[2].value = value; | |
928 | request_send(fc, req); | |
929 | err = req->out.h.error; | |
930 | fuse_put_request(fc, req); | |
931 | if (err == -ENOSYS) { | |
932 | fc->no_setxattr = 1; | |
933 | err = -EOPNOTSUPP; | |
934 | } | |
935 | return err; | |
936 | } | |
937 | ||
938 | static ssize_t fuse_getxattr(struct dentry *entry, const char *name, | |
939 | void *value, size_t size) | |
940 | { | |
941 | struct inode *inode = entry->d_inode; | |
942 | struct fuse_conn *fc = get_fuse_conn(inode); | |
943 | struct fuse_req *req; | |
944 | struct fuse_getxattr_in inarg; | |
945 | struct fuse_getxattr_out outarg; | |
946 | ssize_t ret; | |
947 | ||
948 | if (fc->no_getxattr) | |
949 | return -EOPNOTSUPP; | |
950 | ||
951 | req = fuse_get_request(fc); | |
952 | if (!req) | |
7c352bdf | 953 | return -EINTR; |
92a8780e MS |
954 | |
955 | memset(&inarg, 0, sizeof(inarg)); | |
956 | inarg.size = size; | |
957 | req->in.h.opcode = FUSE_GETXATTR; | |
958 | req->in.h.nodeid = get_node_id(inode); | |
959 | req->inode = inode; | |
960 | req->in.numargs = 2; | |
961 | req->in.args[0].size = sizeof(inarg); | |
962 | req->in.args[0].value = &inarg; | |
963 | req->in.args[1].size = strlen(name) + 1; | |
964 | req->in.args[1].value = name; | |
965 | /* This is really two different operations rolled into one */ | |
966 | req->out.numargs = 1; | |
967 | if (size) { | |
968 | req->out.argvar = 1; | |
969 | req->out.args[0].size = size; | |
970 | req->out.args[0].value = value; | |
971 | } else { | |
972 | req->out.args[0].size = sizeof(outarg); | |
973 | req->out.args[0].value = &outarg; | |
974 | } | |
975 | request_send(fc, req); | |
976 | ret = req->out.h.error; | |
977 | if (!ret) | |
978 | ret = size ? req->out.args[0].size : outarg.size; | |
979 | else { | |
980 | if (ret == -ENOSYS) { | |
981 | fc->no_getxattr = 1; | |
982 | ret = -EOPNOTSUPP; | |
983 | } | |
984 | } | |
985 | fuse_put_request(fc, req); | |
986 | return ret; | |
987 | } | |
988 | ||
989 | static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) | |
990 | { | |
991 | struct inode *inode = entry->d_inode; | |
992 | struct fuse_conn *fc = get_fuse_conn(inode); | |
993 | struct fuse_req *req; | |
994 | struct fuse_getxattr_in inarg; | |
995 | struct fuse_getxattr_out outarg; | |
996 | ssize_t ret; | |
997 | ||
998 | if (fc->no_listxattr) | |
999 | return -EOPNOTSUPP; | |
1000 | ||
1001 | req = fuse_get_request(fc); | |
1002 | if (!req) | |
7c352bdf | 1003 | return -EINTR; |
92a8780e MS |
1004 | |
1005 | memset(&inarg, 0, sizeof(inarg)); | |
1006 | inarg.size = size; | |
1007 | req->in.h.opcode = FUSE_LISTXATTR; | |
1008 | req->in.h.nodeid = get_node_id(inode); | |
1009 | req->inode = inode; | |
1010 | req->in.numargs = 1; | |
1011 | req->in.args[0].size = sizeof(inarg); | |
1012 | req->in.args[0].value = &inarg; | |
1013 | /* This is really two different operations rolled into one */ | |
1014 | req->out.numargs = 1; | |
1015 | if (size) { | |
1016 | req->out.argvar = 1; | |
1017 | req->out.args[0].size = size; | |
1018 | req->out.args[0].value = list; | |
1019 | } else { | |
1020 | req->out.args[0].size = sizeof(outarg); | |
1021 | req->out.args[0].value = &outarg; | |
1022 | } | |
1023 | request_send(fc, req); | |
1024 | ret = req->out.h.error; | |
1025 | if (!ret) | |
1026 | ret = size ? req->out.args[0].size : outarg.size; | |
1027 | else { | |
1028 | if (ret == -ENOSYS) { | |
1029 | fc->no_listxattr = 1; | |
1030 | ret = -EOPNOTSUPP; | |
1031 | } | |
1032 | } | |
1033 | fuse_put_request(fc, req); | |
1034 | return ret; | |
1035 | } | |
1036 | ||
1037 | static int fuse_removexattr(struct dentry *entry, const char *name) | |
1038 | { | |
1039 | struct inode *inode = entry->d_inode; | |
1040 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1041 | struct fuse_req *req; | |
1042 | int err; | |
1043 | ||
1044 | if (fc->no_removexattr) | |
1045 | return -EOPNOTSUPP; | |
1046 | ||
1047 | req = fuse_get_request(fc); | |
1048 | if (!req) | |
7c352bdf | 1049 | return -EINTR; |
92a8780e MS |
1050 | |
1051 | req->in.h.opcode = FUSE_REMOVEXATTR; | |
1052 | req->in.h.nodeid = get_node_id(inode); | |
1053 | req->inode = inode; | |
1054 | req->in.numargs = 1; | |
1055 | req->in.args[0].size = strlen(name) + 1; | |
1056 | req->in.args[0].value = name; | |
1057 | request_send(fc, req); | |
1058 | err = req->out.h.error; | |
1059 | fuse_put_request(fc, req); | |
1060 | if (err == -ENOSYS) { | |
1061 | fc->no_removexattr = 1; | |
1062 | err = -EOPNOTSUPP; | |
1063 | } | |
1064 | return err; | |
1065 | } | |
1066 | ||
e5e5558e MS |
1067 | static struct inode_operations fuse_dir_inode_operations = { |
1068 | .lookup = fuse_lookup, | |
9e6268db MS |
1069 | .mkdir = fuse_mkdir, |
1070 | .symlink = fuse_symlink, | |
1071 | .unlink = fuse_unlink, | |
1072 | .rmdir = fuse_rmdir, | |
1073 | .rename = fuse_rename, | |
1074 | .link = fuse_link, | |
1075 | .setattr = fuse_setattr, | |
1076 | .create = fuse_create, | |
1077 | .mknod = fuse_mknod, | |
e5e5558e MS |
1078 | .permission = fuse_permission, |
1079 | .getattr = fuse_getattr, | |
92a8780e MS |
1080 | .setxattr = fuse_setxattr, |
1081 | .getxattr = fuse_getxattr, | |
1082 | .listxattr = fuse_listxattr, | |
1083 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1084 | }; |
1085 | ||
1086 | static struct file_operations fuse_dir_operations = { | |
b6aeaded | 1087 | .llseek = generic_file_llseek, |
e5e5558e MS |
1088 | .read = generic_read_dir, |
1089 | .readdir = fuse_readdir, | |
1090 | .open = fuse_dir_open, | |
1091 | .release = fuse_dir_release, | |
82547981 | 1092 | .fsync = fuse_dir_fsync, |
e5e5558e MS |
1093 | }; |
1094 | ||
1095 | static struct inode_operations fuse_common_inode_operations = { | |
9e6268db | 1096 | .setattr = fuse_setattr, |
e5e5558e MS |
1097 | .permission = fuse_permission, |
1098 | .getattr = fuse_getattr, | |
92a8780e MS |
1099 | .setxattr = fuse_setxattr, |
1100 | .getxattr = fuse_getxattr, | |
1101 | .listxattr = fuse_listxattr, | |
1102 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1103 | }; |
1104 | ||
1105 | static struct inode_operations fuse_symlink_inode_operations = { | |
9e6268db | 1106 | .setattr = fuse_setattr, |
e5e5558e MS |
1107 | .follow_link = fuse_follow_link, |
1108 | .put_link = fuse_put_link, | |
1109 | .readlink = generic_readlink, | |
1110 | .getattr = fuse_getattr, | |
92a8780e MS |
1111 | .setxattr = fuse_setxattr, |
1112 | .getxattr = fuse_getxattr, | |
1113 | .listxattr = fuse_listxattr, | |
1114 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1115 | }; |
1116 | ||
1117 | void fuse_init_common(struct inode *inode) | |
1118 | { | |
1119 | inode->i_op = &fuse_common_inode_operations; | |
1120 | } | |
1121 | ||
1122 | void fuse_init_dir(struct inode *inode) | |
1123 | { | |
1124 | inode->i_op = &fuse_dir_inode_operations; | |
1125 | inode->i_fop = &fuse_dir_operations; | |
1126 | } | |
1127 | ||
1128 | void fuse_init_symlink(struct inode *inode) | |
1129 | { | |
1130 | inode->i_op = &fuse_symlink_inode_operations; | |
1131 | } |