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