]>
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> | |
fd72faac | 16 | #include <linux/mount.h> |
e5e5558e MS |
17 | |
18 | static inline unsigned long time_to_jiffies(unsigned long sec, | |
19 | unsigned long nsec) | |
20 | { | |
21 | struct timespec ts = {sec, nsec}; | |
22 | return jiffies + timespec_to_jiffies(&ts); | |
23 | } | |
24 | ||
25 | static void fuse_lookup_init(struct fuse_req *req, struct inode *dir, | |
26 | struct dentry *entry, | |
27 | struct fuse_entry_out *outarg) | |
28 | { | |
29 | req->in.h.opcode = FUSE_LOOKUP; | |
30 | req->in.h.nodeid = get_node_id(dir); | |
31 | req->inode = dir; | |
32 | req->in.numargs = 1; | |
33 | req->in.args[0].size = entry->d_name.len + 1; | |
34 | req->in.args[0].value = entry->d_name.name; | |
35 | req->out.numargs = 1; | |
36 | req->out.args[0].size = sizeof(struct fuse_entry_out); | |
37 | req->out.args[0].value = outarg; | |
38 | } | |
39 | ||
40 | static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) | |
41 | { | |
42 | if (!entry->d_inode || is_bad_inode(entry->d_inode)) | |
43 | return 0; | |
44 | else if (time_after(jiffies, entry->d_time)) { | |
45 | int err; | |
e5e5558e MS |
46 | struct fuse_entry_out outarg; |
47 | struct inode *inode = entry->d_inode; | |
48 | struct fuse_inode *fi = get_fuse_inode(inode); | |
49 | struct fuse_conn *fc = get_fuse_conn(inode); | |
7c352bdf | 50 | struct fuse_req *req = fuse_get_request(fc); |
e5e5558e MS |
51 | if (!req) |
52 | return 0; | |
53 | ||
54 | fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg); | |
7c352bdf | 55 | request_send(fc, req); |
e5e5558e | 56 | err = req->out.h.error; |
9e6268db MS |
57 | if (!err) { |
58 | if (outarg.nodeid != get_node_id(inode)) { | |
59 | fuse_send_forget(fc, req, outarg.nodeid, 1); | |
60 | return 0; | |
61 | } | |
62 | fi->nlookup ++; | |
63 | } | |
e5e5558e | 64 | fuse_put_request(fc, req); |
9e6268db | 65 | if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) |
e5e5558e MS |
66 | return 0; |
67 | ||
68 | fuse_change_attributes(inode, &outarg.attr); | |
e5e5558e MS |
69 | entry->d_time = time_to_jiffies(outarg.entry_valid, |
70 | outarg.entry_valid_nsec); | |
71 | fi->i_time = time_to_jiffies(outarg.attr_valid, | |
72 | outarg.attr_valid_nsec); | |
73 | } | |
74 | return 1; | |
75 | } | |
76 | ||
f007d5c9 MS |
77 | static int dir_alias(struct inode *inode) |
78 | { | |
79 | if (S_ISDIR(inode->i_mode)) { | |
80 | /* Don't allow creating an alias to a directory */ | |
81 | struct dentry *alias = d_find_alias(inode); | |
82 | if (alias) { | |
83 | dput(alias); | |
84 | return 1; | |
85 | } | |
86 | } | |
87 | return 0; | |
88 | } | |
89 | ||
e5e5558e MS |
90 | static struct dentry_operations fuse_dentry_operations = { |
91 | .d_revalidate = fuse_dentry_revalidate, | |
92 | }; | |
93 | ||
94 | static int fuse_lookup_iget(struct inode *dir, struct dentry *entry, | |
95 | struct inode **inodep) | |
96 | { | |
97 | int err; | |
e5e5558e MS |
98 | struct fuse_entry_out outarg; |
99 | struct inode *inode = NULL; | |
100 | struct fuse_conn *fc = get_fuse_conn(dir); | |
101 | struct fuse_req *req; | |
102 | ||
103 | if (entry->d_name.len > FUSE_NAME_MAX) | |
104 | return -ENAMETOOLONG; | |
105 | ||
106 | req = fuse_get_request(fc); | |
107 | if (!req) | |
7c352bdf | 108 | return -EINTR; |
e5e5558e MS |
109 | |
110 | fuse_lookup_init(req, dir, entry, &outarg); | |
111 | request_send(fc, req); | |
e5e5558e | 112 | err = req->out.h.error; |
ee4e5271 MS |
113 | if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID)) |
114 | err = -EIO; | |
e5e5558e MS |
115 | if (!err) { |
116 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, | |
9e6268db | 117 | &outarg.attr); |
e5e5558e | 118 | if (!inode) { |
9e6268db | 119 | fuse_send_forget(fc, req, outarg.nodeid, 1); |
e5e5558e MS |
120 | return -ENOMEM; |
121 | } | |
122 | } | |
123 | fuse_put_request(fc, req); | |
124 | if (err && err != -ENOENT) | |
125 | return err; | |
126 | ||
127 | if (inode) { | |
128 | struct fuse_inode *fi = get_fuse_inode(inode); | |
129 | entry->d_time = time_to_jiffies(outarg.entry_valid, | |
130 | outarg.entry_valid_nsec); | |
131 | fi->i_time = time_to_jiffies(outarg.attr_valid, | |
132 | outarg.attr_valid_nsec); | |
133 | } | |
134 | ||
135 | entry->d_op = &fuse_dentry_operations; | |
136 | *inodep = inode; | |
137 | return 0; | |
138 | } | |
139 | ||
9e6268db MS |
140 | void fuse_invalidate_attr(struct inode *inode) |
141 | { | |
142 | get_fuse_inode(inode)->i_time = jiffies - 1; | |
143 | } | |
144 | ||
145 | static void fuse_invalidate_entry(struct dentry *entry) | |
146 | { | |
147 | d_invalidate(entry); | |
148 | entry->d_time = jiffies - 1; | |
149 | } | |
150 | ||
fd72faac MS |
151 | static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, |
152 | struct nameidata *nd) | |
153 | { | |
154 | int err; | |
155 | struct inode *inode; | |
156 | struct fuse_conn *fc = get_fuse_conn(dir); | |
157 | struct fuse_req *req; | |
158 | struct fuse_open_in inarg; | |
159 | struct fuse_open_out outopen; | |
160 | struct fuse_entry_out outentry; | |
161 | struct fuse_inode *fi; | |
162 | struct fuse_file *ff; | |
163 | struct file *file; | |
164 | int flags = nd->intent.open.flags - 1; | |
165 | ||
166 | err = -ENOSYS; | |
167 | if (fc->no_create) | |
168 | goto out; | |
169 | ||
170 | err = -ENAMETOOLONG; | |
171 | if (entry->d_name.len > FUSE_NAME_MAX) | |
172 | goto out; | |
173 | ||
174 | err = -EINTR; | |
175 | req = fuse_get_request(fc); | |
176 | if (!req) | |
177 | goto out; | |
178 | ||
179 | ff = fuse_file_alloc(); | |
180 | if (!ff) | |
181 | goto out_put_request; | |
182 | ||
183 | flags &= ~O_NOCTTY; | |
184 | memset(&inarg, 0, sizeof(inarg)); | |
185 | inarg.flags = flags; | |
186 | inarg.mode = mode; | |
187 | req->in.h.opcode = FUSE_CREATE; | |
188 | req->in.h.nodeid = get_node_id(dir); | |
189 | req->inode = dir; | |
190 | req->in.numargs = 2; | |
191 | req->in.args[0].size = sizeof(inarg); | |
192 | req->in.args[0].value = &inarg; | |
193 | req->in.args[1].size = entry->d_name.len + 1; | |
194 | req->in.args[1].value = entry->d_name.name; | |
195 | req->out.numargs = 2; | |
196 | req->out.args[0].size = sizeof(outentry); | |
197 | req->out.args[0].value = &outentry; | |
198 | req->out.args[1].size = sizeof(outopen); | |
199 | req->out.args[1].value = &outopen; | |
200 | request_send(fc, req); | |
201 | err = req->out.h.error; | |
202 | if (err) { | |
203 | if (err == -ENOSYS) | |
204 | fc->no_create = 1; | |
205 | goto out_free_ff; | |
206 | } | |
207 | ||
208 | err = -EIO; | |
209 | if (!S_ISREG(outentry.attr.mode)) | |
210 | goto out_free_ff; | |
211 | ||
212 | inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, | |
213 | &outentry.attr); | |
214 | err = -ENOMEM; | |
215 | if (!inode) { | |
216 | flags &= ~(O_CREAT | O_EXCL | O_TRUNC); | |
217 | ff->fh = outopen.fh; | |
218 | fuse_send_release(fc, ff, outentry.nodeid, NULL, flags, 0); | |
219 | goto out_put_request; | |
220 | } | |
221 | fuse_put_request(fc, req); | |
222 | entry->d_time = time_to_jiffies(outentry.entry_valid, | |
223 | outentry.entry_valid_nsec); | |
224 | fi = get_fuse_inode(inode); | |
225 | fi->i_time = time_to_jiffies(outentry.attr_valid, | |
226 | outentry.attr_valid_nsec); | |
227 | ||
228 | d_instantiate(entry, inode); | |
229 | file = lookup_instantiate_filp(nd, entry, generic_file_open); | |
230 | if (IS_ERR(file)) { | |
231 | ff->fh = outopen.fh; | |
232 | fuse_send_release(fc, ff, outentry.nodeid, inode, flags, 0); | |
233 | return PTR_ERR(file); | |
234 | } | |
235 | fuse_finish_open(inode, file, ff, &outopen); | |
236 | return 0; | |
237 | ||
238 | out_free_ff: | |
239 | fuse_file_free(ff); | |
240 | out_put_request: | |
241 | fuse_put_request(fc, req); | |
242 | out: | |
243 | return err; | |
244 | } | |
245 | ||
9e6268db MS |
246 | static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, |
247 | struct inode *dir, struct dentry *entry, | |
248 | int mode) | |
249 | { | |
250 | struct fuse_entry_out outarg; | |
251 | struct inode *inode; | |
252 | struct fuse_inode *fi; | |
253 | int err; | |
254 | ||
255 | req->in.h.nodeid = get_node_id(dir); | |
256 | req->inode = dir; | |
257 | req->out.numargs = 1; | |
258 | req->out.args[0].size = sizeof(outarg); | |
259 | req->out.args[0].value = &outarg; | |
260 | request_send(fc, req); | |
261 | err = req->out.h.error; | |
262 | if (err) { | |
263 | fuse_put_request(fc, req); | |
264 | return err; | |
265 | } | |
ee4e5271 MS |
266 | if (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID) { |
267 | fuse_put_request(fc, req); | |
268 | return -EIO; | |
269 | } | |
9e6268db MS |
270 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, |
271 | &outarg.attr); | |
272 | if (!inode) { | |
273 | fuse_send_forget(fc, req, outarg.nodeid, 1); | |
274 | return -ENOMEM; | |
275 | } | |
276 | fuse_put_request(fc, req); | |
277 | ||
278 | /* Don't allow userspace to do really stupid things... */ | |
f007d5c9 | 279 | if (((inode->i_mode ^ mode) & S_IFMT) || dir_alias(inode)) { |
9e6268db MS |
280 | iput(inode); |
281 | return -EIO; | |
282 | } | |
283 | ||
284 | entry->d_time = time_to_jiffies(outarg.entry_valid, | |
285 | outarg.entry_valid_nsec); | |
286 | ||
287 | fi = get_fuse_inode(inode); | |
288 | fi->i_time = time_to_jiffies(outarg.attr_valid, | |
289 | outarg.attr_valid_nsec); | |
290 | ||
291 | d_instantiate(entry, inode); | |
292 | fuse_invalidate_attr(dir); | |
293 | return 0; | |
294 | } | |
295 | ||
296 | static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, | |
297 | dev_t rdev) | |
298 | { | |
299 | struct fuse_mknod_in inarg; | |
300 | struct fuse_conn *fc = get_fuse_conn(dir); | |
301 | struct fuse_req *req = fuse_get_request(fc); | |
302 | if (!req) | |
7c352bdf | 303 | return -EINTR; |
9e6268db MS |
304 | |
305 | memset(&inarg, 0, sizeof(inarg)); | |
306 | inarg.mode = mode; | |
307 | inarg.rdev = new_encode_dev(rdev); | |
308 | req->in.h.opcode = FUSE_MKNOD; | |
309 | req->in.numargs = 2; | |
310 | req->in.args[0].size = sizeof(inarg); | |
311 | req->in.args[0].value = &inarg; | |
312 | req->in.args[1].size = entry->d_name.len + 1; | |
313 | req->in.args[1].value = entry->d_name.name; | |
314 | return create_new_entry(fc, req, dir, entry, mode); | |
315 | } | |
316 | ||
317 | static int fuse_create(struct inode *dir, struct dentry *entry, int mode, | |
318 | struct nameidata *nd) | |
319 | { | |
fd72faac MS |
320 | if (nd && (nd->flags & LOOKUP_CREATE)) { |
321 | int err = fuse_create_open(dir, entry, mode, nd); | |
322 | if (err != -ENOSYS) | |
323 | return err; | |
324 | /* Fall back on mknod */ | |
325 | } | |
9e6268db MS |
326 | return fuse_mknod(dir, entry, mode, 0); |
327 | } | |
328 | ||
329 | static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) | |
330 | { | |
331 | struct fuse_mkdir_in inarg; | |
332 | struct fuse_conn *fc = get_fuse_conn(dir); | |
333 | struct fuse_req *req = fuse_get_request(fc); | |
334 | if (!req) | |
7c352bdf | 335 | return -EINTR; |
9e6268db MS |
336 | |
337 | memset(&inarg, 0, sizeof(inarg)); | |
338 | inarg.mode = mode; | |
339 | req->in.h.opcode = FUSE_MKDIR; | |
340 | req->in.numargs = 2; | |
341 | req->in.args[0].size = sizeof(inarg); | |
342 | req->in.args[0].value = &inarg; | |
343 | req->in.args[1].size = entry->d_name.len + 1; | |
344 | req->in.args[1].value = entry->d_name.name; | |
345 | return create_new_entry(fc, req, dir, entry, S_IFDIR); | |
346 | } | |
347 | ||
348 | static int fuse_symlink(struct inode *dir, struct dentry *entry, | |
349 | const char *link) | |
350 | { | |
351 | struct fuse_conn *fc = get_fuse_conn(dir); | |
352 | unsigned len = strlen(link) + 1; | |
353 | struct fuse_req *req; | |
354 | ||
355 | if (len > FUSE_SYMLINK_MAX) | |
356 | return -ENAMETOOLONG; | |
357 | ||
358 | req = fuse_get_request(fc); | |
359 | if (!req) | |
7c352bdf | 360 | return -EINTR; |
9e6268db MS |
361 | |
362 | req->in.h.opcode = FUSE_SYMLINK; | |
363 | req->in.numargs = 2; | |
364 | req->in.args[0].size = entry->d_name.len + 1; | |
365 | req->in.args[0].value = entry->d_name.name; | |
366 | req->in.args[1].size = len; | |
367 | req->in.args[1].value = link; | |
368 | return create_new_entry(fc, req, dir, entry, S_IFLNK); | |
369 | } | |
370 | ||
371 | static int fuse_unlink(struct inode *dir, struct dentry *entry) | |
372 | { | |
373 | int err; | |
374 | struct fuse_conn *fc = get_fuse_conn(dir); | |
375 | struct fuse_req *req = fuse_get_request(fc); | |
376 | if (!req) | |
7c352bdf | 377 | return -EINTR; |
9e6268db MS |
378 | |
379 | req->in.h.opcode = FUSE_UNLINK; | |
380 | req->in.h.nodeid = get_node_id(dir); | |
381 | req->inode = dir; | |
382 | req->in.numargs = 1; | |
383 | req->in.args[0].size = entry->d_name.len + 1; | |
384 | req->in.args[0].value = entry->d_name.name; | |
385 | request_send(fc, req); | |
386 | err = req->out.h.error; | |
387 | fuse_put_request(fc, req); | |
388 | if (!err) { | |
389 | struct inode *inode = entry->d_inode; | |
390 | ||
391 | /* Set nlink to zero so the inode can be cleared, if | |
392 | the inode does have more links this will be | |
393 | discovered at the next lookup/getattr */ | |
394 | inode->i_nlink = 0; | |
395 | fuse_invalidate_attr(inode); | |
396 | fuse_invalidate_attr(dir); | |
397 | } else if (err == -EINTR) | |
398 | fuse_invalidate_entry(entry); | |
399 | return err; | |
400 | } | |
401 | ||
402 | static int fuse_rmdir(struct inode *dir, struct dentry *entry) | |
403 | { | |
404 | int err; | |
405 | struct fuse_conn *fc = get_fuse_conn(dir); | |
406 | struct fuse_req *req = fuse_get_request(fc); | |
407 | if (!req) | |
7c352bdf | 408 | return -EINTR; |
9e6268db MS |
409 | |
410 | req->in.h.opcode = FUSE_RMDIR; | |
411 | req->in.h.nodeid = get_node_id(dir); | |
412 | req->inode = dir; | |
413 | req->in.numargs = 1; | |
414 | req->in.args[0].size = entry->d_name.len + 1; | |
415 | req->in.args[0].value = entry->d_name.name; | |
416 | request_send(fc, req); | |
417 | err = req->out.h.error; | |
418 | fuse_put_request(fc, req); | |
419 | if (!err) { | |
420 | entry->d_inode->i_nlink = 0; | |
421 | fuse_invalidate_attr(dir); | |
422 | } else if (err == -EINTR) | |
423 | fuse_invalidate_entry(entry); | |
424 | return err; | |
425 | } | |
426 | ||
427 | static int fuse_rename(struct inode *olddir, struct dentry *oldent, | |
428 | struct inode *newdir, struct dentry *newent) | |
429 | { | |
430 | int err; | |
431 | struct fuse_rename_in inarg; | |
432 | struct fuse_conn *fc = get_fuse_conn(olddir); | |
433 | struct fuse_req *req = fuse_get_request(fc); | |
434 | if (!req) | |
7c352bdf | 435 | return -EINTR; |
9e6268db MS |
436 | |
437 | memset(&inarg, 0, sizeof(inarg)); | |
438 | inarg.newdir = get_node_id(newdir); | |
439 | req->in.h.opcode = FUSE_RENAME; | |
440 | req->in.h.nodeid = get_node_id(olddir); | |
441 | req->inode = olddir; | |
442 | req->inode2 = newdir; | |
443 | req->in.numargs = 3; | |
444 | req->in.args[0].size = sizeof(inarg); | |
445 | req->in.args[0].value = &inarg; | |
446 | req->in.args[1].size = oldent->d_name.len + 1; | |
447 | req->in.args[1].value = oldent->d_name.name; | |
448 | req->in.args[2].size = newent->d_name.len + 1; | |
449 | req->in.args[2].value = newent->d_name.name; | |
450 | request_send(fc, req); | |
451 | err = req->out.h.error; | |
452 | fuse_put_request(fc, req); | |
453 | if (!err) { | |
454 | fuse_invalidate_attr(olddir); | |
455 | if (olddir != newdir) | |
456 | fuse_invalidate_attr(newdir); | |
457 | } else if (err == -EINTR) { | |
458 | /* If request was interrupted, DEITY only knows if the | |
459 | rename actually took place. If the invalidation | |
460 | fails (e.g. some process has CWD under the renamed | |
461 | directory), then there can be inconsistency between | |
462 | the dcache and the real filesystem. Tough luck. */ | |
463 | fuse_invalidate_entry(oldent); | |
464 | if (newent->d_inode) | |
465 | fuse_invalidate_entry(newent); | |
466 | } | |
467 | ||
468 | return err; | |
469 | } | |
470 | ||
471 | static int fuse_link(struct dentry *entry, struct inode *newdir, | |
472 | struct dentry *newent) | |
473 | { | |
474 | int err; | |
475 | struct fuse_link_in inarg; | |
476 | struct inode *inode = entry->d_inode; | |
477 | struct fuse_conn *fc = get_fuse_conn(inode); | |
478 | struct fuse_req *req = fuse_get_request(fc); | |
479 | if (!req) | |
7c352bdf | 480 | return -EINTR; |
9e6268db MS |
481 | |
482 | memset(&inarg, 0, sizeof(inarg)); | |
483 | inarg.oldnodeid = get_node_id(inode); | |
484 | req->in.h.opcode = FUSE_LINK; | |
485 | req->inode2 = inode; | |
486 | req->in.numargs = 2; | |
487 | req->in.args[0].size = sizeof(inarg); | |
488 | req->in.args[0].value = &inarg; | |
489 | req->in.args[1].size = newent->d_name.len + 1; | |
490 | req->in.args[1].value = newent->d_name.name; | |
491 | err = create_new_entry(fc, req, newdir, newent, inode->i_mode); | |
492 | /* Contrary to "normal" filesystems it can happen that link | |
493 | makes two "logical" inodes point to the same "physical" | |
494 | inode. We invalidate the attributes of the old one, so it | |
495 | will reflect changes in the backing inode (link count, | |
496 | etc.) | |
497 | */ | |
498 | if (!err || err == -EINTR) | |
499 | fuse_invalidate_attr(inode); | |
500 | return err; | |
501 | } | |
502 | ||
e5e5558e MS |
503 | int fuse_do_getattr(struct inode *inode) |
504 | { | |
505 | int err; | |
506 | struct fuse_attr_out arg; | |
507 | struct fuse_conn *fc = get_fuse_conn(inode); | |
508 | struct fuse_req *req = fuse_get_request(fc); | |
509 | if (!req) | |
7c352bdf | 510 | return -EINTR; |
e5e5558e MS |
511 | |
512 | req->in.h.opcode = FUSE_GETATTR; | |
513 | req->in.h.nodeid = get_node_id(inode); | |
514 | req->inode = inode; | |
515 | req->out.numargs = 1; | |
516 | req->out.args[0].size = sizeof(arg); | |
517 | req->out.args[0].value = &arg; | |
518 | request_send(fc, req); | |
519 | err = req->out.h.error; | |
520 | fuse_put_request(fc, req); | |
521 | if (!err) { | |
522 | if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) { | |
523 | make_bad_inode(inode); | |
524 | err = -EIO; | |
525 | } else { | |
526 | struct fuse_inode *fi = get_fuse_inode(inode); | |
527 | fuse_change_attributes(inode, &arg.attr); | |
528 | fi->i_time = time_to_jiffies(arg.attr_valid, | |
529 | arg.attr_valid_nsec); | |
530 | } | |
531 | } | |
532 | return err; | |
533 | } | |
534 | ||
87729a55 MS |
535 | /* |
536 | * Calling into a user-controlled filesystem gives the filesystem | |
537 | * daemon ptrace-like capabilities over the requester process. This | |
538 | * means, that the filesystem daemon is able to record the exact | |
539 | * filesystem operations performed, and can also control the behavior | |
540 | * of the requester process in otherwise impossible ways. For example | |
541 | * it can delay the operation for arbitrary length of time allowing | |
542 | * DoS against the requester. | |
543 | * | |
544 | * For this reason only those processes can call into the filesystem, | |
545 | * for which the owner of the mount has ptrace privilege. This | |
546 | * excludes processes started by other users, suid or sgid processes. | |
547 | */ | |
548 | static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task) | |
549 | { | |
550 | if (fc->flags & FUSE_ALLOW_OTHER) | |
551 | return 1; | |
552 | ||
553 | if (task->euid == fc->user_id && | |
554 | task->suid == fc->user_id && | |
555 | task->uid == fc->user_id && | |
556 | task->egid == fc->group_id && | |
557 | task->sgid == fc->group_id && | |
558 | task->gid == fc->group_id) | |
559 | return 1; | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
e5e5558e MS |
564 | static int fuse_revalidate(struct dentry *entry) |
565 | { | |
566 | struct inode *inode = entry->d_inode; | |
567 | struct fuse_inode *fi = get_fuse_inode(inode); | |
568 | struct fuse_conn *fc = get_fuse_conn(inode); | |
569 | ||
87729a55 MS |
570 | if (!fuse_allow_task(fc, current)) |
571 | return -EACCES; | |
572 | if (get_node_id(inode) != FUSE_ROOT_ID && | |
573 | time_before_eq(jiffies, fi->i_time)) | |
e5e5558e MS |
574 | return 0; |
575 | ||
576 | return fuse_do_getattr(inode); | |
577 | } | |
578 | ||
31d40d74 MS |
579 | static int fuse_access(struct inode *inode, int mask) |
580 | { | |
581 | struct fuse_conn *fc = get_fuse_conn(inode); | |
582 | struct fuse_req *req; | |
583 | struct fuse_access_in inarg; | |
584 | int err; | |
585 | ||
586 | if (fc->no_access) | |
587 | return 0; | |
588 | ||
589 | req = fuse_get_request(fc); | |
590 | if (!req) | |
591 | return -EINTR; | |
592 | ||
593 | memset(&inarg, 0, sizeof(inarg)); | |
594 | inarg.mask = mask; | |
595 | req->in.h.opcode = FUSE_ACCESS; | |
596 | req->in.h.nodeid = get_node_id(inode); | |
597 | req->inode = inode; | |
598 | req->in.numargs = 1; | |
599 | req->in.args[0].size = sizeof(inarg); | |
600 | req->in.args[0].value = &inarg; | |
601 | request_send(fc, req); | |
602 | err = req->out.h.error; | |
603 | fuse_put_request(fc, req); | |
604 | if (err == -ENOSYS) { | |
605 | fc->no_access = 1; | |
606 | err = 0; | |
607 | } | |
608 | return err; | |
609 | } | |
610 | ||
e5e5558e MS |
611 | static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd) |
612 | { | |
613 | struct fuse_conn *fc = get_fuse_conn(inode); | |
614 | ||
87729a55 | 615 | if (!fuse_allow_task(fc, current)) |
e5e5558e | 616 | return -EACCES; |
1e9a4ed9 MS |
617 | else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
618 | int err = generic_permission(inode, mask, NULL); | |
619 | ||
620 | /* If permission is denied, try to refresh file | |
621 | attributes. This is also needed, because the root | |
622 | node will at first have no permissions */ | |
623 | if (err == -EACCES) { | |
624 | err = fuse_do_getattr(inode); | |
625 | if (!err) | |
626 | err = generic_permission(inode, mask, NULL); | |
627 | } | |
628 | ||
629 | /* FIXME: Need some mechanism to revoke permissions: | |
630 | currently if the filesystem suddenly changes the | |
631 | file mode, we will not be informed about it, and | |
632 | continue to allow access to the file/directory. | |
633 | ||
634 | This is actually not so grave, since the user can | |
635 | simply keep access to the file/directory anyway by | |
636 | keeping it open... */ | |
637 | ||
638 | return err; | |
639 | } else { | |
e5e5558e | 640 | int mode = inode->i_mode; |
e5e5558e MS |
641 | if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO)) |
642 | return -EACCES; | |
31d40d74 MS |
643 | |
644 | if (nd && (nd->flags & LOOKUP_ACCESS)) | |
645 | return fuse_access(inode, mask); | |
e5e5558e MS |
646 | return 0; |
647 | } | |
648 | } | |
649 | ||
650 | static int parse_dirfile(char *buf, size_t nbytes, struct file *file, | |
651 | void *dstbuf, filldir_t filldir) | |
652 | { | |
653 | while (nbytes >= FUSE_NAME_OFFSET) { | |
654 | struct fuse_dirent *dirent = (struct fuse_dirent *) buf; | |
655 | size_t reclen = FUSE_DIRENT_SIZE(dirent); | |
656 | int over; | |
657 | if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX) | |
658 | return -EIO; | |
659 | if (reclen > nbytes) | |
660 | break; | |
661 | ||
662 | over = filldir(dstbuf, dirent->name, dirent->namelen, | |
663 | file->f_pos, dirent->ino, dirent->type); | |
664 | if (over) | |
665 | break; | |
666 | ||
667 | buf += reclen; | |
668 | nbytes -= reclen; | |
669 | file->f_pos = dirent->off; | |
670 | } | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
04730fef MS |
675 | static inline size_t fuse_send_readdir(struct fuse_req *req, struct file *file, |
676 | struct inode *inode, loff_t pos, | |
677 | size_t count) | |
e5e5558e | 678 | { |
04730fef | 679 | return fuse_send_read_common(req, file, inode, pos, count, 1); |
e5e5558e MS |
680 | } |
681 | ||
04730fef | 682 | static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) |
e5e5558e | 683 | { |
04730fef MS |
684 | int err; |
685 | size_t nbytes; | |
686 | struct page *page; | |
e5e5558e MS |
687 | struct inode *inode = file->f_dentry->d_inode; |
688 | struct fuse_conn *fc = get_fuse_conn(inode); | |
7c352bdf | 689 | struct fuse_req *req = fuse_get_request(fc); |
e5e5558e | 690 | if (!req) |
04730fef | 691 | return -EINTR; |
e5e5558e | 692 | |
04730fef MS |
693 | page = alloc_page(GFP_KERNEL); |
694 | if (!page) { | |
695 | fuse_put_request(fc, req); | |
696 | return -ENOMEM; | |
697 | } | |
698 | req->num_pages = 1; | |
699 | req->pages[0] = page; | |
700 | nbytes = fuse_send_readdir(req, file, inode, file->f_pos, PAGE_SIZE); | |
e5e5558e MS |
701 | err = req->out.h.error; |
702 | fuse_put_request(fc, req); | |
703 | if (!err) | |
04730fef MS |
704 | err = parse_dirfile(page_address(page), nbytes, file, dstbuf, |
705 | filldir); | |
e5e5558e | 706 | |
04730fef | 707 | __free_page(page); |
b36c31ba | 708 | fuse_invalidate_attr(inode); /* atime changed */ |
04730fef | 709 | return err; |
e5e5558e MS |
710 | } |
711 | ||
712 | static char *read_link(struct dentry *dentry) | |
713 | { | |
714 | struct inode *inode = dentry->d_inode; | |
715 | struct fuse_conn *fc = get_fuse_conn(inode); | |
716 | struct fuse_req *req = fuse_get_request(fc); | |
717 | char *link; | |
718 | ||
719 | if (!req) | |
7c352bdf | 720 | return ERR_PTR(-EINTR); |
e5e5558e MS |
721 | |
722 | link = (char *) __get_free_page(GFP_KERNEL); | |
723 | if (!link) { | |
724 | link = ERR_PTR(-ENOMEM); | |
725 | goto out; | |
726 | } | |
727 | req->in.h.opcode = FUSE_READLINK; | |
728 | req->in.h.nodeid = get_node_id(inode); | |
729 | req->inode = inode; | |
730 | req->out.argvar = 1; | |
731 | req->out.numargs = 1; | |
732 | req->out.args[0].size = PAGE_SIZE - 1; | |
733 | req->out.args[0].value = link; | |
734 | request_send(fc, req); | |
735 | if (req->out.h.error) { | |
736 | free_page((unsigned long) link); | |
737 | link = ERR_PTR(req->out.h.error); | |
738 | } else | |
739 | link[req->out.args[0].size] = '\0'; | |
740 | out: | |
741 | fuse_put_request(fc, req); | |
b36c31ba | 742 | fuse_invalidate_attr(inode); /* atime changed */ |
e5e5558e MS |
743 | return link; |
744 | } | |
745 | ||
746 | static void free_link(char *link) | |
747 | { | |
748 | if (!IS_ERR(link)) | |
749 | free_page((unsigned long) link); | |
750 | } | |
751 | ||
752 | static void *fuse_follow_link(struct dentry *dentry, struct nameidata *nd) | |
753 | { | |
754 | nd_set_link(nd, read_link(dentry)); | |
755 | return NULL; | |
756 | } | |
757 | ||
758 | static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c) | |
759 | { | |
760 | free_link(nd_get_link(nd)); | |
761 | } | |
762 | ||
763 | static int fuse_dir_open(struct inode *inode, struct file *file) | |
764 | { | |
04730fef | 765 | return fuse_open_common(inode, file, 1); |
e5e5558e MS |
766 | } |
767 | ||
768 | static int fuse_dir_release(struct inode *inode, struct file *file) | |
769 | { | |
04730fef | 770 | return fuse_release_common(inode, file, 1); |
e5e5558e MS |
771 | } |
772 | ||
82547981 MS |
773 | static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync) |
774 | { | |
775 | /* nfsd can call this with no file */ | |
776 | return file ? fuse_fsync_common(file, de, datasync, 1) : 0; | |
777 | } | |
778 | ||
befc649c | 779 | static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg) |
9e6268db MS |
780 | { |
781 | unsigned ivalid = iattr->ia_valid; | |
9e6268db MS |
782 | |
783 | if (ivalid & ATTR_MODE) | |
befc649c | 784 | arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode; |
9e6268db | 785 | if (ivalid & ATTR_UID) |
befc649c | 786 | arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid; |
9e6268db | 787 | if (ivalid & ATTR_GID) |
befc649c | 788 | arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid; |
9e6268db | 789 | if (ivalid & ATTR_SIZE) |
befc649c | 790 | arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size; |
9e6268db MS |
791 | /* You can only _set_ these together (they may change by themselves) */ |
792 | if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) { | |
befc649c MS |
793 | arg->valid |= FATTR_ATIME | FATTR_MTIME; |
794 | arg->atime = iattr->ia_atime.tv_sec; | |
795 | arg->mtime = iattr->ia_mtime.tv_sec; | |
796 | } | |
797 | if (ivalid & ATTR_FILE) { | |
798 | struct fuse_file *ff = iattr->ia_file->private_data; | |
799 | arg->valid |= FATTR_FH; | |
800 | arg->fh = ff->fh; | |
9e6268db | 801 | } |
9e6268db MS |
802 | } |
803 | ||
804 | static int fuse_setattr(struct dentry *entry, struct iattr *attr) | |
805 | { | |
806 | struct inode *inode = entry->d_inode; | |
807 | struct fuse_conn *fc = get_fuse_conn(inode); | |
808 | struct fuse_inode *fi = get_fuse_inode(inode); | |
809 | struct fuse_req *req; | |
810 | struct fuse_setattr_in inarg; | |
811 | struct fuse_attr_out outarg; | |
812 | int err; | |
813 | int is_truncate = 0; | |
814 | ||
1e9a4ed9 MS |
815 | if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
816 | err = inode_change_ok(inode, attr); | |
817 | if (err) | |
818 | return err; | |
819 | } | |
820 | ||
9e6268db MS |
821 | if (attr->ia_valid & ATTR_SIZE) { |
822 | unsigned long limit; | |
823 | is_truncate = 1; | |
824 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
825 | if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) { | |
826 | send_sig(SIGXFSZ, current, 0); | |
827 | return -EFBIG; | |
828 | } | |
829 | } | |
830 | ||
831 | req = fuse_get_request(fc); | |
832 | if (!req) | |
7c352bdf | 833 | return -EINTR; |
9e6268db MS |
834 | |
835 | memset(&inarg, 0, sizeof(inarg)); | |
befc649c | 836 | iattr_to_fattr(attr, &inarg); |
9e6268db MS |
837 | req->in.h.opcode = FUSE_SETATTR; |
838 | req->in.h.nodeid = get_node_id(inode); | |
839 | req->inode = inode; | |
840 | req->in.numargs = 1; | |
841 | req->in.args[0].size = sizeof(inarg); | |
842 | req->in.args[0].value = &inarg; | |
843 | req->out.numargs = 1; | |
844 | req->out.args[0].size = sizeof(outarg); | |
845 | req->out.args[0].value = &outarg; | |
846 | request_send(fc, req); | |
847 | err = req->out.h.error; | |
848 | fuse_put_request(fc, req); | |
849 | if (!err) { | |
850 | if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) { | |
851 | make_bad_inode(inode); | |
852 | err = -EIO; | |
853 | } else { | |
854 | if (is_truncate) { | |
855 | loff_t origsize = i_size_read(inode); | |
856 | i_size_write(inode, outarg.attr.size); | |
857 | if (origsize > outarg.attr.size) | |
858 | vmtruncate(inode, outarg.attr.size); | |
859 | } | |
860 | fuse_change_attributes(inode, &outarg.attr); | |
861 | fi->i_time = time_to_jiffies(outarg.attr_valid, | |
862 | outarg.attr_valid_nsec); | |
863 | } | |
864 | } else if (err == -EINTR) | |
865 | fuse_invalidate_attr(inode); | |
866 | ||
867 | return err; | |
868 | } | |
869 | ||
e5e5558e MS |
870 | static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, |
871 | struct kstat *stat) | |
872 | { | |
873 | struct inode *inode = entry->d_inode; | |
874 | int err = fuse_revalidate(entry); | |
875 | if (!err) | |
876 | generic_fillattr(inode, stat); | |
877 | ||
878 | return err; | |
879 | } | |
880 | ||
881 | static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, | |
882 | struct nameidata *nd) | |
883 | { | |
884 | struct inode *inode; | |
fd72faac MS |
885 | int err; |
886 | ||
887 | err = fuse_lookup_iget(dir, entry, &inode); | |
e5e5558e MS |
888 | if (err) |
889 | return ERR_PTR(err); | |
f007d5c9 MS |
890 | if (inode && dir_alias(inode)) { |
891 | iput(inode); | |
892 | return ERR_PTR(-EIO); | |
e5e5558e | 893 | } |
f12ec440 MS |
894 | d_add(entry, inode); |
895 | return NULL; | |
e5e5558e MS |
896 | } |
897 | ||
92a8780e MS |
898 | static int fuse_setxattr(struct dentry *entry, const char *name, |
899 | const void *value, size_t size, int flags) | |
900 | { | |
901 | struct inode *inode = entry->d_inode; | |
902 | struct fuse_conn *fc = get_fuse_conn(inode); | |
903 | struct fuse_req *req; | |
904 | struct fuse_setxattr_in inarg; | |
905 | int err; | |
906 | ||
907 | if (size > FUSE_XATTR_SIZE_MAX) | |
908 | return -E2BIG; | |
909 | ||
910 | if (fc->no_setxattr) | |
911 | return -EOPNOTSUPP; | |
912 | ||
913 | req = fuse_get_request(fc); | |
914 | if (!req) | |
7c352bdf | 915 | return -EINTR; |
92a8780e MS |
916 | |
917 | memset(&inarg, 0, sizeof(inarg)); | |
918 | inarg.size = size; | |
919 | inarg.flags = flags; | |
920 | req->in.h.opcode = FUSE_SETXATTR; | |
921 | req->in.h.nodeid = get_node_id(inode); | |
922 | req->inode = inode; | |
923 | req->in.numargs = 3; | |
924 | req->in.args[0].size = sizeof(inarg); | |
925 | req->in.args[0].value = &inarg; | |
926 | req->in.args[1].size = strlen(name) + 1; | |
927 | req->in.args[1].value = name; | |
928 | req->in.args[2].size = size; | |
929 | req->in.args[2].value = value; | |
930 | request_send(fc, req); | |
931 | err = req->out.h.error; | |
932 | fuse_put_request(fc, req); | |
933 | if (err == -ENOSYS) { | |
934 | fc->no_setxattr = 1; | |
935 | err = -EOPNOTSUPP; | |
936 | } | |
937 | return err; | |
938 | } | |
939 | ||
940 | static ssize_t fuse_getxattr(struct dentry *entry, const char *name, | |
941 | void *value, size_t size) | |
942 | { | |
943 | struct inode *inode = entry->d_inode; | |
944 | struct fuse_conn *fc = get_fuse_conn(inode); | |
945 | struct fuse_req *req; | |
946 | struct fuse_getxattr_in inarg; | |
947 | struct fuse_getxattr_out outarg; | |
948 | ssize_t ret; | |
949 | ||
950 | if (fc->no_getxattr) | |
951 | return -EOPNOTSUPP; | |
952 | ||
953 | req = fuse_get_request(fc); | |
954 | if (!req) | |
7c352bdf | 955 | return -EINTR; |
92a8780e MS |
956 | |
957 | memset(&inarg, 0, sizeof(inarg)); | |
958 | inarg.size = size; | |
959 | req->in.h.opcode = FUSE_GETXATTR; | |
960 | req->in.h.nodeid = get_node_id(inode); | |
961 | req->inode = inode; | |
962 | req->in.numargs = 2; | |
963 | req->in.args[0].size = sizeof(inarg); | |
964 | req->in.args[0].value = &inarg; | |
965 | req->in.args[1].size = strlen(name) + 1; | |
966 | req->in.args[1].value = name; | |
967 | /* This is really two different operations rolled into one */ | |
968 | req->out.numargs = 1; | |
969 | if (size) { | |
970 | req->out.argvar = 1; | |
971 | req->out.args[0].size = size; | |
972 | req->out.args[0].value = value; | |
973 | } else { | |
974 | req->out.args[0].size = sizeof(outarg); | |
975 | req->out.args[0].value = &outarg; | |
976 | } | |
977 | request_send(fc, req); | |
978 | ret = req->out.h.error; | |
979 | if (!ret) | |
980 | ret = size ? req->out.args[0].size : outarg.size; | |
981 | else { | |
982 | if (ret == -ENOSYS) { | |
983 | fc->no_getxattr = 1; | |
984 | ret = -EOPNOTSUPP; | |
985 | } | |
986 | } | |
987 | fuse_put_request(fc, req); | |
988 | return ret; | |
989 | } | |
990 | ||
991 | static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) | |
992 | { | |
993 | struct inode *inode = entry->d_inode; | |
994 | struct fuse_conn *fc = get_fuse_conn(inode); | |
995 | struct fuse_req *req; | |
996 | struct fuse_getxattr_in inarg; | |
997 | struct fuse_getxattr_out outarg; | |
998 | ssize_t ret; | |
999 | ||
1000 | if (fc->no_listxattr) | |
1001 | return -EOPNOTSUPP; | |
1002 | ||
1003 | req = fuse_get_request(fc); | |
1004 | if (!req) | |
7c352bdf | 1005 | return -EINTR; |
92a8780e MS |
1006 | |
1007 | memset(&inarg, 0, sizeof(inarg)); | |
1008 | inarg.size = size; | |
1009 | req->in.h.opcode = FUSE_LISTXATTR; | |
1010 | req->in.h.nodeid = get_node_id(inode); | |
1011 | req->inode = inode; | |
1012 | req->in.numargs = 1; | |
1013 | req->in.args[0].size = sizeof(inarg); | |
1014 | req->in.args[0].value = &inarg; | |
1015 | /* This is really two different operations rolled into one */ | |
1016 | req->out.numargs = 1; | |
1017 | if (size) { | |
1018 | req->out.argvar = 1; | |
1019 | req->out.args[0].size = size; | |
1020 | req->out.args[0].value = list; | |
1021 | } else { | |
1022 | req->out.args[0].size = sizeof(outarg); | |
1023 | req->out.args[0].value = &outarg; | |
1024 | } | |
1025 | request_send(fc, req); | |
1026 | ret = req->out.h.error; | |
1027 | if (!ret) | |
1028 | ret = size ? req->out.args[0].size : outarg.size; | |
1029 | else { | |
1030 | if (ret == -ENOSYS) { | |
1031 | fc->no_listxattr = 1; | |
1032 | ret = -EOPNOTSUPP; | |
1033 | } | |
1034 | } | |
1035 | fuse_put_request(fc, req); | |
1036 | return ret; | |
1037 | } | |
1038 | ||
1039 | static int fuse_removexattr(struct dentry *entry, const char *name) | |
1040 | { | |
1041 | struct inode *inode = entry->d_inode; | |
1042 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1043 | struct fuse_req *req; | |
1044 | int err; | |
1045 | ||
1046 | if (fc->no_removexattr) | |
1047 | return -EOPNOTSUPP; | |
1048 | ||
1049 | req = fuse_get_request(fc); | |
1050 | if (!req) | |
7c352bdf | 1051 | return -EINTR; |
92a8780e MS |
1052 | |
1053 | req->in.h.opcode = FUSE_REMOVEXATTR; | |
1054 | req->in.h.nodeid = get_node_id(inode); | |
1055 | req->inode = inode; | |
1056 | req->in.numargs = 1; | |
1057 | req->in.args[0].size = strlen(name) + 1; | |
1058 | req->in.args[0].value = name; | |
1059 | request_send(fc, req); | |
1060 | err = req->out.h.error; | |
1061 | fuse_put_request(fc, req); | |
1062 | if (err == -ENOSYS) { | |
1063 | fc->no_removexattr = 1; | |
1064 | err = -EOPNOTSUPP; | |
1065 | } | |
1066 | return err; | |
1067 | } | |
1068 | ||
e5e5558e MS |
1069 | static struct inode_operations fuse_dir_inode_operations = { |
1070 | .lookup = fuse_lookup, | |
9e6268db MS |
1071 | .mkdir = fuse_mkdir, |
1072 | .symlink = fuse_symlink, | |
1073 | .unlink = fuse_unlink, | |
1074 | .rmdir = fuse_rmdir, | |
1075 | .rename = fuse_rename, | |
1076 | .link = fuse_link, | |
1077 | .setattr = fuse_setattr, | |
1078 | .create = fuse_create, | |
1079 | .mknod = fuse_mknod, | |
e5e5558e MS |
1080 | .permission = fuse_permission, |
1081 | .getattr = fuse_getattr, | |
92a8780e MS |
1082 | .setxattr = fuse_setxattr, |
1083 | .getxattr = fuse_getxattr, | |
1084 | .listxattr = fuse_listxattr, | |
1085 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1086 | }; |
1087 | ||
1088 | static struct file_operations fuse_dir_operations = { | |
b6aeaded | 1089 | .llseek = generic_file_llseek, |
e5e5558e MS |
1090 | .read = generic_read_dir, |
1091 | .readdir = fuse_readdir, | |
1092 | .open = fuse_dir_open, | |
1093 | .release = fuse_dir_release, | |
82547981 | 1094 | .fsync = fuse_dir_fsync, |
e5e5558e MS |
1095 | }; |
1096 | ||
1097 | static struct inode_operations fuse_common_inode_operations = { | |
9e6268db | 1098 | .setattr = fuse_setattr, |
e5e5558e MS |
1099 | .permission = fuse_permission, |
1100 | .getattr = fuse_getattr, | |
92a8780e MS |
1101 | .setxattr = fuse_setxattr, |
1102 | .getxattr = fuse_getxattr, | |
1103 | .listxattr = fuse_listxattr, | |
1104 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1105 | }; |
1106 | ||
1107 | static struct inode_operations fuse_symlink_inode_operations = { | |
9e6268db | 1108 | .setattr = fuse_setattr, |
e5e5558e MS |
1109 | .follow_link = fuse_follow_link, |
1110 | .put_link = fuse_put_link, | |
1111 | .readlink = generic_readlink, | |
1112 | .getattr = fuse_getattr, | |
92a8780e MS |
1113 | .setxattr = fuse_setxattr, |
1114 | .getxattr = fuse_getxattr, | |
1115 | .listxattr = fuse_listxattr, | |
1116 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1117 | }; |
1118 | ||
1119 | void fuse_init_common(struct inode *inode) | |
1120 | { | |
1121 | inode->i_op = &fuse_common_inode_operations; | |
1122 | } | |
1123 | ||
1124 | void fuse_init_dir(struct inode *inode) | |
1125 | { | |
1126 | inode->i_op = &fuse_dir_inode_operations; | |
1127 | inode->i_fop = &fuse_dir_operations; | |
1128 | } | |
1129 | ||
1130 | void fuse_init_symlink(struct inode *inode) | |
1131 | { | |
1132 | inode->i_op = &fuse_symlink_inode_operations; | |
1133 | } |