Commit | Line | Data |
---|---|---|
e5e5558e MS |
1 | /* |
2 | FUSE: Filesystem in Userspace | |
51eb01e7 | 3 | Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu> |
e5e5558e MS |
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 | ||
0a0898cf MS |
17 | #if BITS_PER_LONG >= 64 |
18 | static inline void fuse_dentry_settime(struct dentry *entry, u64 time) | |
19 | { | |
20 | entry->d_time = time; | |
21 | } | |
22 | ||
23 | static inline u64 fuse_dentry_time(struct dentry *entry) | |
24 | { | |
25 | return entry->d_time; | |
26 | } | |
27 | #else | |
28 | /* | |
29 | * On 32 bit archs store the high 32 bits of time in d_fsdata | |
30 | */ | |
31 | static void fuse_dentry_settime(struct dentry *entry, u64 time) | |
32 | { | |
33 | entry->d_time = time; | |
34 | entry->d_fsdata = (void *) (unsigned long) (time >> 32); | |
35 | } | |
36 | ||
37 | static u64 fuse_dentry_time(struct dentry *entry) | |
38 | { | |
39 | return (u64) entry->d_time + | |
40 | ((u64) (unsigned long) entry->d_fsdata << 32); | |
41 | } | |
42 | #endif | |
43 | ||
6f9f1180 MS |
44 | /* |
45 | * FUSE caches dentries and attributes with separate timeout. The | |
46 | * time in jiffies until the dentry/attributes are valid is stored in | |
47 | * dentry->d_time and fuse_inode->i_time respectively. | |
48 | */ | |
49 | ||
50 | /* | |
51 | * Calculate the time in jiffies until a dentry/attributes are valid | |
52 | */ | |
0a0898cf | 53 | static u64 time_to_jiffies(unsigned long sec, unsigned long nsec) |
e5e5558e | 54 | { |
685d16dd MS |
55 | if (sec || nsec) { |
56 | struct timespec ts = {sec, nsec}; | |
0a0898cf | 57 | return get_jiffies_64() + timespec_to_jiffies(&ts); |
685d16dd | 58 | } else |
0a0898cf | 59 | return 0; |
e5e5558e MS |
60 | } |
61 | ||
6f9f1180 MS |
62 | /* |
63 | * Set dentry and possibly attribute timeouts from the lookup/mk* | |
64 | * replies | |
65 | */ | |
1fb69e78 MS |
66 | static void fuse_change_entry_timeout(struct dentry *entry, |
67 | struct fuse_entry_out *o) | |
0aa7c699 | 68 | { |
0a0898cf MS |
69 | fuse_dentry_settime(entry, |
70 | time_to_jiffies(o->entry_valid, o->entry_valid_nsec)); | |
1fb69e78 MS |
71 | } |
72 | ||
73 | static u64 attr_timeout(struct fuse_attr_out *o) | |
74 | { | |
75 | return time_to_jiffies(o->attr_valid, o->attr_valid_nsec); | |
76 | } | |
77 | ||
78 | static u64 entry_attr_timeout(struct fuse_entry_out *o) | |
79 | { | |
80 | return time_to_jiffies(o->attr_valid, o->attr_valid_nsec); | |
8cbdf1e6 MS |
81 | } |
82 | ||
6f9f1180 MS |
83 | /* |
84 | * Mark the attributes as stale, so that at the next call to | |
85 | * ->getattr() they will be fetched from userspace | |
86 | */ | |
8cbdf1e6 MS |
87 | void fuse_invalidate_attr(struct inode *inode) |
88 | { | |
0a0898cf | 89 | get_fuse_inode(inode)->i_time = 0; |
8cbdf1e6 MS |
90 | } |
91 | ||
6f9f1180 MS |
92 | /* |
93 | * Just mark the entry as stale, so that a next attempt to look it up | |
94 | * will result in a new lookup call to userspace | |
95 | * | |
96 | * This is called when a dentry is about to become negative and the | |
97 | * timeout is unknown (unlink, rmdir, rename and in some cases | |
98 | * lookup) | |
99 | */ | |
dbd561d2 | 100 | void fuse_invalidate_entry_cache(struct dentry *entry) |
8cbdf1e6 | 101 | { |
0a0898cf | 102 | fuse_dentry_settime(entry, 0); |
8cbdf1e6 MS |
103 | } |
104 | ||
6f9f1180 MS |
105 | /* |
106 | * Same as fuse_invalidate_entry_cache(), but also try to remove the | |
107 | * dentry from the hash | |
108 | */ | |
8cbdf1e6 MS |
109 | static void fuse_invalidate_entry(struct dentry *entry) |
110 | { | |
111 | d_invalidate(entry); | |
112 | fuse_invalidate_entry_cache(entry); | |
0aa7c699 MS |
113 | } |
114 | ||
c180eebe MS |
115 | static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_req *req, |
116 | u64 nodeid, struct qstr *name, | |
e5e5558e MS |
117 | struct fuse_entry_out *outarg) |
118 | { | |
0e9663ee | 119 | memset(outarg, 0, sizeof(struct fuse_entry_out)); |
e5e5558e | 120 | req->in.h.opcode = FUSE_LOOKUP; |
c180eebe | 121 | req->in.h.nodeid = nodeid; |
e5e5558e | 122 | req->in.numargs = 1; |
c180eebe MS |
123 | req->in.args[0].size = name->len + 1; |
124 | req->in.args[0].value = name->name; | |
e5e5558e | 125 | req->out.numargs = 1; |
0e9663ee MS |
126 | if (fc->minor < 9) |
127 | req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; | |
128 | else | |
129 | req->out.args[0].size = sizeof(struct fuse_entry_out); | |
e5e5558e MS |
130 | req->out.args[0].value = outarg; |
131 | } | |
132 | ||
5c5c5e51 | 133 | u64 fuse_get_attr_version(struct fuse_conn *fc) |
7dca9fd3 MS |
134 | { |
135 | u64 curr_version; | |
136 | ||
137 | /* | |
138 | * The spin lock isn't actually needed on 64bit archs, but we | |
139 | * don't yet care too much about such optimizations. | |
140 | */ | |
141 | spin_lock(&fc->lock); | |
142 | curr_version = fc->attr_version; | |
143 | spin_unlock(&fc->lock); | |
144 | ||
145 | return curr_version; | |
146 | } | |
147 | ||
6f9f1180 MS |
148 | /* |
149 | * Check whether the dentry is still valid | |
150 | * | |
151 | * If the entry validity timeout has expired and the dentry is | |
152 | * positive, try to redo the lookup. If the lookup results in a | |
153 | * different inode, then let the VFS invalidate the dentry and redo | |
154 | * the lookup once more. If the lookup results in the same inode, | |
155 | * then refresh the attributes, timeouts and mark the dentry valid. | |
156 | */ | |
e5e5558e MS |
157 | static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) |
158 | { | |
8cbdf1e6 MS |
159 | struct inode *inode = entry->d_inode; |
160 | ||
161 | if (inode && is_bad_inode(inode)) | |
e5e5558e | 162 | return 0; |
0a0898cf | 163 | else if (fuse_dentry_time(entry) < get_jiffies_64()) { |
e5e5558e | 164 | int err; |
e5e5558e | 165 | struct fuse_entry_out outarg; |
8cbdf1e6 MS |
166 | struct fuse_conn *fc; |
167 | struct fuse_req *req; | |
2d51013e | 168 | struct fuse_req *forget_req; |
e956edd0 | 169 | struct dentry *parent; |
1fb69e78 | 170 | u64 attr_version; |
8cbdf1e6 | 171 | |
50322fe7 | 172 | /* For negative dentries, always do a fresh lookup */ |
8cbdf1e6 MS |
173 | if (!inode) |
174 | return 0; | |
175 | ||
176 | fc = get_fuse_conn(inode); | |
ce1d5a49 MS |
177 | req = fuse_get_req(fc); |
178 | if (IS_ERR(req)) | |
e5e5558e MS |
179 | return 0; |
180 | ||
2d51013e MS |
181 | forget_req = fuse_get_req(fc); |
182 | if (IS_ERR(forget_req)) { | |
183 | fuse_put_request(fc, req); | |
184 | return 0; | |
185 | } | |
186 | ||
7dca9fd3 | 187 | attr_version = fuse_get_attr_version(fc); |
1fb69e78 | 188 | |
e956edd0 | 189 | parent = dget_parent(entry); |
c180eebe MS |
190 | fuse_lookup_init(fc, req, get_node_id(parent->d_inode), |
191 | &entry->d_name, &outarg); | |
7c352bdf | 192 | request_send(fc, req); |
e956edd0 | 193 | dput(parent); |
e5e5558e | 194 | err = req->out.h.error; |
2d51013e | 195 | fuse_put_request(fc, req); |
50322fe7 MS |
196 | /* Zero nodeid is same as -ENOENT */ |
197 | if (!err && !outarg.nodeid) | |
198 | err = -ENOENT; | |
9e6268db | 199 | if (!err) { |
8cbdf1e6 | 200 | struct fuse_inode *fi = get_fuse_inode(inode); |
9e6268db | 201 | if (outarg.nodeid != get_node_id(inode)) { |
2d51013e MS |
202 | fuse_send_forget(fc, forget_req, |
203 | outarg.nodeid, 1); | |
9e6268db MS |
204 | return 0; |
205 | } | |
8da5ff23 | 206 | spin_lock(&fc->lock); |
9e6268db | 207 | fi->nlookup ++; |
8da5ff23 | 208 | spin_unlock(&fc->lock); |
9e6268db | 209 | } |
2d51013e | 210 | fuse_put_request(fc, forget_req); |
9e6268db | 211 | if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) |
e5e5558e MS |
212 | return 0; |
213 | ||
1fb69e78 MS |
214 | fuse_change_attributes(inode, &outarg.attr, |
215 | entry_attr_timeout(&outarg), | |
216 | attr_version); | |
217 | fuse_change_entry_timeout(entry, &outarg); | |
e5e5558e MS |
218 | } |
219 | return 1; | |
220 | } | |
221 | ||
8bfc016d | 222 | static int invalid_nodeid(u64 nodeid) |
2827d0b2 MS |
223 | { |
224 | return !nodeid || nodeid == FUSE_ROOT_ID; | |
225 | } | |
226 | ||
dbd561d2 | 227 | struct dentry_operations fuse_dentry_operations = { |
e5e5558e MS |
228 | .d_revalidate = fuse_dentry_revalidate, |
229 | }; | |
230 | ||
a5bfffac | 231 | int fuse_valid_type(int m) |
39ee059a MS |
232 | { |
233 | return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) || | |
234 | S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m); | |
235 | } | |
236 | ||
d2a85164 MS |
237 | /* |
238 | * Add a directory inode to a dentry, ensuring that no other dentry | |
239 | * refers to this inode. Called with fc->inst_mutex. | |
240 | */ | |
0de6256d MS |
241 | static struct dentry *fuse_d_add_directory(struct dentry *entry, |
242 | struct inode *inode) | |
d2a85164 MS |
243 | { |
244 | struct dentry *alias = d_find_alias(inode); | |
0de6256d | 245 | if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) { |
d2a85164 MS |
246 | /* This tries to shrink the subtree below alias */ |
247 | fuse_invalidate_entry(alias); | |
248 | dput(alias); | |
249 | if (!list_empty(&inode->i_dentry)) | |
0de6256d MS |
250 | return ERR_PTR(-EBUSY); |
251 | } else { | |
252 | dput(alias); | |
d2a85164 | 253 | } |
0de6256d | 254 | return d_splice_alias(inode, entry); |
d2a85164 MS |
255 | } |
256 | ||
c180eebe MS |
257 | int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, |
258 | struct fuse_entry_out *outarg, struct inode **inode) | |
e5e5558e | 259 | { |
c180eebe | 260 | struct fuse_conn *fc = get_fuse_conn_super(sb); |
e5e5558e | 261 | struct fuse_req *req; |
2d51013e | 262 | struct fuse_req *forget_req; |
1fb69e78 | 263 | u64 attr_version; |
c180eebe | 264 | int err; |
e5e5558e | 265 | |
c180eebe MS |
266 | *inode = NULL; |
267 | err = -ENAMETOOLONG; | |
268 | if (name->len > FUSE_NAME_MAX) | |
269 | goto out; | |
e5e5558e | 270 | |
ce1d5a49 | 271 | req = fuse_get_req(fc); |
c180eebe | 272 | err = PTR_ERR(req); |
ce1d5a49 | 273 | if (IS_ERR(req)) |
c180eebe | 274 | goto out; |
e5e5558e | 275 | |
2d51013e | 276 | forget_req = fuse_get_req(fc); |
c180eebe | 277 | err = PTR_ERR(forget_req); |
2d51013e MS |
278 | if (IS_ERR(forget_req)) { |
279 | fuse_put_request(fc, req); | |
c180eebe | 280 | goto out; |
2d51013e MS |
281 | } |
282 | ||
7dca9fd3 | 283 | attr_version = fuse_get_attr_version(fc); |
1fb69e78 | 284 | |
c180eebe | 285 | fuse_lookup_init(fc, req, nodeid, name, outarg); |
e5e5558e | 286 | request_send(fc, req); |
e5e5558e | 287 | err = req->out.h.error; |
2d51013e | 288 | fuse_put_request(fc, req); |
50322fe7 | 289 | /* Zero nodeid is same as -ENOENT, but with valid timeout */ |
c180eebe MS |
290 | if (err || !outarg->nodeid) |
291 | goto out_put_forget; | |
292 | ||
293 | err = -EIO; | |
294 | if (!outarg->nodeid) | |
295 | goto out_put_forget; | |
296 | if (!fuse_valid_type(outarg->attr.mode)) | |
297 | goto out_put_forget; | |
298 | ||
299 | *inode = fuse_iget(sb, outarg->nodeid, outarg->generation, | |
300 | &outarg->attr, entry_attr_timeout(outarg), | |
301 | attr_version); | |
302 | err = -ENOMEM; | |
303 | if (!*inode) { | |
304 | fuse_send_forget(fc, forget_req, outarg->nodeid, 1); | |
305 | goto out; | |
e5e5558e | 306 | } |
c180eebe MS |
307 | err = 0; |
308 | ||
309 | out_put_forget: | |
2d51013e | 310 | fuse_put_request(fc, forget_req); |
c180eebe MS |
311 | out: |
312 | return err; | |
313 | } | |
314 | ||
315 | static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, | |
316 | struct nameidata *nd) | |
317 | { | |
318 | int err; | |
319 | struct fuse_entry_out outarg; | |
320 | struct inode *inode; | |
321 | struct dentry *newent; | |
322 | struct fuse_conn *fc = get_fuse_conn(dir); | |
323 | bool outarg_valid = true; | |
324 | ||
325 | err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name, | |
326 | &outarg, &inode); | |
327 | if (err == -ENOENT) { | |
328 | outarg_valid = false; | |
329 | err = 0; | |
330 | } | |
331 | if (err) | |
332 | goto out_err; | |
333 | ||
334 | err = -EIO; | |
335 | if (inode && get_node_id(inode) == FUSE_ROOT_ID) | |
336 | goto out_iput; | |
e5e5558e | 337 | |
d2a85164 MS |
338 | if (inode && S_ISDIR(inode->i_mode)) { |
339 | mutex_lock(&fc->inst_mutex); | |
0de6256d | 340 | newent = fuse_d_add_directory(entry, inode); |
d2a85164 | 341 | mutex_unlock(&fc->inst_mutex); |
c180eebe MS |
342 | err = PTR_ERR(newent); |
343 | if (IS_ERR(newent)) | |
344 | goto out_iput; | |
345 | } else { | |
0de6256d | 346 | newent = d_splice_alias(inode, entry); |
c180eebe | 347 | } |
d2a85164 | 348 | |
0de6256d | 349 | entry = newent ? newent : entry; |
e5e5558e | 350 | entry->d_op = &fuse_dentry_operations; |
c180eebe | 351 | if (outarg_valid) |
1fb69e78 | 352 | fuse_change_entry_timeout(entry, &outarg); |
8cbdf1e6 MS |
353 | else |
354 | fuse_invalidate_entry_cache(entry); | |
c180eebe | 355 | |
0de6256d | 356 | return newent; |
c180eebe MS |
357 | |
358 | out_iput: | |
359 | iput(inode); | |
360 | out_err: | |
361 | return ERR_PTR(err); | |
e5e5558e MS |
362 | } |
363 | ||
51eb01e7 MS |
364 | /* |
365 | * Synchronous release for the case when something goes wrong in CREATE_OPEN | |
366 | */ | |
367 | static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff, | |
368 | u64 nodeid, int flags) | |
369 | { | |
c756e0a4 MS |
370 | fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE); |
371 | ff->reserved_req->force = 1; | |
372 | request_send(fc, ff->reserved_req); | |
373 | fuse_put_request(fc, ff->reserved_req); | |
374 | kfree(ff); | |
51eb01e7 MS |
375 | } |
376 | ||
6f9f1180 MS |
377 | /* |
378 | * Atomic create+open operation | |
379 | * | |
380 | * If the filesystem doesn't support this, then fall back to separate | |
381 | * 'mknod' + 'open' requests. | |
382 | */ | |
fd72faac MS |
383 | static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, |
384 | struct nameidata *nd) | |
385 | { | |
386 | int err; | |
387 | struct inode *inode; | |
388 | struct fuse_conn *fc = get_fuse_conn(dir); | |
389 | struct fuse_req *req; | |
51eb01e7 | 390 | struct fuse_req *forget_req; |
fd72faac MS |
391 | struct fuse_open_in inarg; |
392 | struct fuse_open_out outopen; | |
393 | struct fuse_entry_out outentry; | |
fd72faac MS |
394 | struct fuse_file *ff; |
395 | struct file *file; | |
396 | int flags = nd->intent.open.flags - 1; | |
397 | ||
fd72faac | 398 | if (fc->no_create) |
ce1d5a49 | 399 | return -ENOSYS; |
fd72faac | 400 | |
51eb01e7 MS |
401 | forget_req = fuse_get_req(fc); |
402 | if (IS_ERR(forget_req)) | |
403 | return PTR_ERR(forget_req); | |
404 | ||
ce1d5a49 | 405 | req = fuse_get_req(fc); |
51eb01e7 | 406 | err = PTR_ERR(req); |
ce1d5a49 | 407 | if (IS_ERR(req)) |
51eb01e7 | 408 | goto out_put_forget_req; |
fd72faac | 409 | |
ce1d5a49 | 410 | err = -ENOMEM; |
fd72faac MS |
411 | ff = fuse_file_alloc(); |
412 | if (!ff) | |
413 | goto out_put_request; | |
414 | ||
415 | flags &= ~O_NOCTTY; | |
416 | memset(&inarg, 0, sizeof(inarg)); | |
0e9663ee | 417 | memset(&outentry, 0, sizeof(outentry)); |
fd72faac MS |
418 | inarg.flags = flags; |
419 | inarg.mode = mode; | |
420 | req->in.h.opcode = FUSE_CREATE; | |
421 | req->in.h.nodeid = get_node_id(dir); | |
fd72faac MS |
422 | req->in.numargs = 2; |
423 | req->in.args[0].size = sizeof(inarg); | |
424 | req->in.args[0].value = &inarg; | |
425 | req->in.args[1].size = entry->d_name.len + 1; | |
426 | req->in.args[1].value = entry->d_name.name; | |
427 | req->out.numargs = 2; | |
0e9663ee MS |
428 | if (fc->minor < 9) |
429 | req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; | |
430 | else | |
431 | req->out.args[0].size = sizeof(outentry); | |
fd72faac MS |
432 | req->out.args[0].value = &outentry; |
433 | req->out.args[1].size = sizeof(outopen); | |
434 | req->out.args[1].value = &outopen; | |
435 | request_send(fc, req); | |
436 | err = req->out.h.error; | |
437 | if (err) { | |
438 | if (err == -ENOSYS) | |
439 | fc->no_create = 1; | |
440 | goto out_free_ff; | |
441 | } | |
442 | ||
443 | err = -EIO; | |
2827d0b2 | 444 | if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid)) |
fd72faac MS |
445 | goto out_free_ff; |
446 | ||
51eb01e7 | 447 | fuse_put_request(fc, req); |
fd72faac | 448 | inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation, |
1fb69e78 | 449 | &outentry.attr, entry_attr_timeout(&outentry), 0); |
fd72faac MS |
450 | if (!inode) { |
451 | flags &= ~(O_CREAT | O_EXCL | O_TRUNC); | |
452 | ff->fh = outopen.fh; | |
51eb01e7 MS |
453 | fuse_sync_release(fc, ff, outentry.nodeid, flags); |
454 | fuse_send_forget(fc, forget_req, outentry.nodeid, 1); | |
455 | return -ENOMEM; | |
fd72faac | 456 | } |
51eb01e7 | 457 | fuse_put_request(fc, forget_req); |
fd72faac | 458 | d_instantiate(entry, inode); |
1fb69e78 | 459 | fuse_change_entry_timeout(entry, &outentry); |
0952b2a4 | 460 | fuse_invalidate_attr(dir); |
fd72faac MS |
461 | file = lookup_instantiate_filp(nd, entry, generic_file_open); |
462 | if (IS_ERR(file)) { | |
463 | ff->fh = outopen.fh; | |
51eb01e7 | 464 | fuse_sync_release(fc, ff, outentry.nodeid, flags); |
fd72faac MS |
465 | return PTR_ERR(file); |
466 | } | |
467 | fuse_finish_open(inode, file, ff, &outopen); | |
468 | return 0; | |
469 | ||
470 | out_free_ff: | |
471 | fuse_file_free(ff); | |
472 | out_put_request: | |
473 | fuse_put_request(fc, req); | |
51eb01e7 MS |
474 | out_put_forget_req: |
475 | fuse_put_request(fc, forget_req); | |
fd72faac MS |
476 | return err; |
477 | } | |
478 | ||
6f9f1180 MS |
479 | /* |
480 | * Code shared between mknod, mkdir, symlink and link | |
481 | */ | |
9e6268db MS |
482 | static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, |
483 | struct inode *dir, struct dentry *entry, | |
484 | int mode) | |
485 | { | |
486 | struct fuse_entry_out outarg; | |
487 | struct inode *inode; | |
9e6268db | 488 | int err; |
2d51013e MS |
489 | struct fuse_req *forget_req; |
490 | ||
491 | forget_req = fuse_get_req(fc); | |
492 | if (IS_ERR(forget_req)) { | |
493 | fuse_put_request(fc, req); | |
494 | return PTR_ERR(forget_req); | |
495 | } | |
9e6268db | 496 | |
0e9663ee | 497 | memset(&outarg, 0, sizeof(outarg)); |
9e6268db | 498 | req->in.h.nodeid = get_node_id(dir); |
9e6268db | 499 | req->out.numargs = 1; |
0e9663ee MS |
500 | if (fc->minor < 9) |
501 | req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE; | |
502 | else | |
503 | req->out.args[0].size = sizeof(outarg); | |
9e6268db MS |
504 | req->out.args[0].value = &outarg; |
505 | request_send(fc, req); | |
506 | err = req->out.h.error; | |
2d51013e MS |
507 | fuse_put_request(fc, req); |
508 | if (err) | |
509 | goto out_put_forget_req; | |
510 | ||
39ee059a MS |
511 | err = -EIO; |
512 | if (invalid_nodeid(outarg.nodeid)) | |
2d51013e | 513 | goto out_put_forget_req; |
39ee059a MS |
514 | |
515 | if ((outarg.attr.mode ^ mode) & S_IFMT) | |
2d51013e | 516 | goto out_put_forget_req; |
39ee059a | 517 | |
9e6268db | 518 | inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, |
1fb69e78 | 519 | &outarg.attr, entry_attr_timeout(&outarg), 0); |
9e6268db | 520 | if (!inode) { |
2d51013e | 521 | fuse_send_forget(fc, forget_req, outarg.nodeid, 1); |
9e6268db MS |
522 | return -ENOMEM; |
523 | } | |
2d51013e | 524 | fuse_put_request(fc, forget_req); |
9e6268db | 525 | |
d2a85164 MS |
526 | if (S_ISDIR(inode->i_mode)) { |
527 | struct dentry *alias; | |
528 | mutex_lock(&fc->inst_mutex); | |
529 | alias = d_find_alias(inode); | |
530 | if (alias) { | |
531 | /* New directory must have moved since mkdir */ | |
532 | mutex_unlock(&fc->inst_mutex); | |
533 | dput(alias); | |
534 | iput(inode); | |
535 | return -EBUSY; | |
536 | } | |
537 | d_instantiate(entry, inode); | |
538 | mutex_unlock(&fc->inst_mutex); | |
539 | } else | |
540 | d_instantiate(entry, inode); | |
9e6268db | 541 | |
1fb69e78 | 542 | fuse_change_entry_timeout(entry, &outarg); |
9e6268db MS |
543 | fuse_invalidate_attr(dir); |
544 | return 0; | |
39ee059a | 545 | |
2d51013e MS |
546 | out_put_forget_req: |
547 | fuse_put_request(fc, forget_req); | |
39ee059a | 548 | return err; |
9e6268db MS |
549 | } |
550 | ||
551 | static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, | |
552 | dev_t rdev) | |
553 | { | |
554 | struct fuse_mknod_in inarg; | |
555 | struct fuse_conn *fc = get_fuse_conn(dir); | |
ce1d5a49 MS |
556 | struct fuse_req *req = fuse_get_req(fc); |
557 | if (IS_ERR(req)) | |
558 | return PTR_ERR(req); | |
9e6268db MS |
559 | |
560 | memset(&inarg, 0, sizeof(inarg)); | |
561 | inarg.mode = mode; | |
562 | inarg.rdev = new_encode_dev(rdev); | |
563 | req->in.h.opcode = FUSE_MKNOD; | |
564 | req->in.numargs = 2; | |
565 | req->in.args[0].size = sizeof(inarg); | |
566 | req->in.args[0].value = &inarg; | |
567 | req->in.args[1].size = entry->d_name.len + 1; | |
568 | req->in.args[1].value = entry->d_name.name; | |
569 | return create_new_entry(fc, req, dir, entry, mode); | |
570 | } | |
571 | ||
572 | static int fuse_create(struct inode *dir, struct dentry *entry, int mode, | |
573 | struct nameidata *nd) | |
574 | { | |
b9ba347f | 575 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
fd72faac MS |
576 | int err = fuse_create_open(dir, entry, mode, nd); |
577 | if (err != -ENOSYS) | |
578 | return err; | |
579 | /* Fall back on mknod */ | |
580 | } | |
9e6268db MS |
581 | return fuse_mknod(dir, entry, mode, 0); |
582 | } | |
583 | ||
584 | static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) | |
585 | { | |
586 | struct fuse_mkdir_in inarg; | |
587 | struct fuse_conn *fc = get_fuse_conn(dir); | |
ce1d5a49 MS |
588 | struct fuse_req *req = fuse_get_req(fc); |
589 | if (IS_ERR(req)) | |
590 | return PTR_ERR(req); | |
9e6268db MS |
591 | |
592 | memset(&inarg, 0, sizeof(inarg)); | |
593 | inarg.mode = mode; | |
594 | req->in.h.opcode = FUSE_MKDIR; | |
595 | req->in.numargs = 2; | |
596 | req->in.args[0].size = sizeof(inarg); | |
597 | req->in.args[0].value = &inarg; | |
598 | req->in.args[1].size = entry->d_name.len + 1; | |
599 | req->in.args[1].value = entry->d_name.name; | |
600 | return create_new_entry(fc, req, dir, entry, S_IFDIR); | |
601 | } | |
602 | ||
603 | static int fuse_symlink(struct inode *dir, struct dentry *entry, | |
604 | const char *link) | |
605 | { | |
606 | struct fuse_conn *fc = get_fuse_conn(dir); | |
607 | unsigned len = strlen(link) + 1; | |
ce1d5a49 MS |
608 | struct fuse_req *req = fuse_get_req(fc); |
609 | if (IS_ERR(req)) | |
610 | return PTR_ERR(req); | |
9e6268db MS |
611 | |
612 | req->in.h.opcode = FUSE_SYMLINK; | |
613 | req->in.numargs = 2; | |
614 | req->in.args[0].size = entry->d_name.len + 1; | |
615 | req->in.args[0].value = entry->d_name.name; | |
616 | req->in.args[1].size = len; | |
617 | req->in.args[1].value = link; | |
618 | return create_new_entry(fc, req, dir, entry, S_IFLNK); | |
619 | } | |
620 | ||
621 | static int fuse_unlink(struct inode *dir, struct dentry *entry) | |
622 | { | |
623 | int err; | |
624 | struct fuse_conn *fc = get_fuse_conn(dir); | |
ce1d5a49 MS |
625 | struct fuse_req *req = fuse_get_req(fc); |
626 | if (IS_ERR(req)) | |
627 | return PTR_ERR(req); | |
9e6268db MS |
628 | |
629 | req->in.h.opcode = FUSE_UNLINK; | |
630 | req->in.h.nodeid = get_node_id(dir); | |
9e6268db MS |
631 | req->in.numargs = 1; |
632 | req->in.args[0].size = entry->d_name.len + 1; | |
633 | req->in.args[0].value = entry->d_name.name; | |
634 | request_send(fc, req); | |
635 | err = req->out.h.error; | |
636 | fuse_put_request(fc, req); | |
637 | if (!err) { | |
638 | struct inode *inode = entry->d_inode; | |
639 | ||
640 | /* Set nlink to zero so the inode can be cleared, if | |
641 | the inode does have more links this will be | |
642 | discovered at the next lookup/getattr */ | |
ce71ec36 | 643 | clear_nlink(inode); |
9e6268db MS |
644 | fuse_invalidate_attr(inode); |
645 | fuse_invalidate_attr(dir); | |
8cbdf1e6 | 646 | fuse_invalidate_entry_cache(entry); |
9e6268db MS |
647 | } else if (err == -EINTR) |
648 | fuse_invalidate_entry(entry); | |
649 | return err; | |
650 | } | |
651 | ||
652 | static int fuse_rmdir(struct inode *dir, struct dentry *entry) | |
653 | { | |
654 | int err; | |
655 | struct fuse_conn *fc = get_fuse_conn(dir); | |
ce1d5a49 MS |
656 | struct fuse_req *req = fuse_get_req(fc); |
657 | if (IS_ERR(req)) | |
658 | return PTR_ERR(req); | |
9e6268db MS |
659 | |
660 | req->in.h.opcode = FUSE_RMDIR; | |
661 | req->in.h.nodeid = get_node_id(dir); | |
9e6268db MS |
662 | req->in.numargs = 1; |
663 | req->in.args[0].size = entry->d_name.len + 1; | |
664 | req->in.args[0].value = entry->d_name.name; | |
665 | request_send(fc, req); | |
666 | err = req->out.h.error; | |
667 | fuse_put_request(fc, req); | |
668 | if (!err) { | |
ce71ec36 | 669 | clear_nlink(entry->d_inode); |
9e6268db | 670 | fuse_invalidate_attr(dir); |
8cbdf1e6 | 671 | fuse_invalidate_entry_cache(entry); |
9e6268db MS |
672 | } else if (err == -EINTR) |
673 | fuse_invalidate_entry(entry); | |
674 | return err; | |
675 | } | |
676 | ||
677 | static int fuse_rename(struct inode *olddir, struct dentry *oldent, | |
678 | struct inode *newdir, struct dentry *newent) | |
679 | { | |
680 | int err; | |
681 | struct fuse_rename_in inarg; | |
682 | struct fuse_conn *fc = get_fuse_conn(olddir); | |
ce1d5a49 MS |
683 | struct fuse_req *req = fuse_get_req(fc); |
684 | if (IS_ERR(req)) | |
685 | return PTR_ERR(req); | |
9e6268db MS |
686 | |
687 | memset(&inarg, 0, sizeof(inarg)); | |
688 | inarg.newdir = get_node_id(newdir); | |
689 | req->in.h.opcode = FUSE_RENAME; | |
690 | req->in.h.nodeid = get_node_id(olddir); | |
9e6268db MS |
691 | req->in.numargs = 3; |
692 | req->in.args[0].size = sizeof(inarg); | |
693 | req->in.args[0].value = &inarg; | |
694 | req->in.args[1].size = oldent->d_name.len + 1; | |
695 | req->in.args[1].value = oldent->d_name.name; | |
696 | req->in.args[2].size = newent->d_name.len + 1; | |
697 | req->in.args[2].value = newent->d_name.name; | |
698 | request_send(fc, req); | |
699 | err = req->out.h.error; | |
700 | fuse_put_request(fc, req); | |
701 | if (!err) { | |
08b63307 MS |
702 | /* ctime changes */ |
703 | fuse_invalidate_attr(oldent->d_inode); | |
704 | ||
9e6268db MS |
705 | fuse_invalidate_attr(olddir); |
706 | if (olddir != newdir) | |
707 | fuse_invalidate_attr(newdir); | |
8cbdf1e6 MS |
708 | |
709 | /* newent will end up negative */ | |
710 | if (newent->d_inode) | |
711 | fuse_invalidate_entry_cache(newent); | |
9e6268db MS |
712 | } else if (err == -EINTR) { |
713 | /* If request was interrupted, DEITY only knows if the | |
714 | rename actually took place. If the invalidation | |
715 | fails (e.g. some process has CWD under the renamed | |
716 | directory), then there can be inconsistency between | |
717 | the dcache and the real filesystem. Tough luck. */ | |
718 | fuse_invalidate_entry(oldent); | |
719 | if (newent->d_inode) | |
720 | fuse_invalidate_entry(newent); | |
721 | } | |
722 | ||
723 | return err; | |
724 | } | |
725 | ||
726 | static int fuse_link(struct dentry *entry, struct inode *newdir, | |
727 | struct dentry *newent) | |
728 | { | |
729 | int err; | |
730 | struct fuse_link_in inarg; | |
731 | struct inode *inode = entry->d_inode; | |
732 | struct fuse_conn *fc = get_fuse_conn(inode); | |
ce1d5a49 MS |
733 | struct fuse_req *req = fuse_get_req(fc); |
734 | if (IS_ERR(req)) | |
735 | return PTR_ERR(req); | |
9e6268db MS |
736 | |
737 | memset(&inarg, 0, sizeof(inarg)); | |
738 | inarg.oldnodeid = get_node_id(inode); | |
739 | req->in.h.opcode = FUSE_LINK; | |
9e6268db MS |
740 | req->in.numargs = 2; |
741 | req->in.args[0].size = sizeof(inarg); | |
742 | req->in.args[0].value = &inarg; | |
743 | req->in.args[1].size = newent->d_name.len + 1; | |
744 | req->in.args[1].value = newent->d_name.name; | |
745 | err = create_new_entry(fc, req, newdir, newent, inode->i_mode); | |
746 | /* Contrary to "normal" filesystems it can happen that link | |
747 | makes two "logical" inodes point to the same "physical" | |
748 | inode. We invalidate the attributes of the old one, so it | |
749 | will reflect changes in the backing inode (link count, | |
750 | etc.) | |
751 | */ | |
752 | if (!err || err == -EINTR) | |
753 | fuse_invalidate_attr(inode); | |
754 | return err; | |
755 | } | |
756 | ||
1fb69e78 MS |
757 | static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr, |
758 | struct kstat *stat) | |
759 | { | |
760 | stat->dev = inode->i_sb->s_dev; | |
761 | stat->ino = attr->ino; | |
762 | stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777); | |
763 | stat->nlink = attr->nlink; | |
764 | stat->uid = attr->uid; | |
765 | stat->gid = attr->gid; | |
766 | stat->rdev = inode->i_rdev; | |
767 | stat->atime.tv_sec = attr->atime; | |
768 | stat->atime.tv_nsec = attr->atimensec; | |
769 | stat->mtime.tv_sec = attr->mtime; | |
770 | stat->mtime.tv_nsec = attr->mtimensec; | |
771 | stat->ctime.tv_sec = attr->ctime; | |
772 | stat->ctime.tv_nsec = attr->ctimensec; | |
773 | stat->size = attr->size; | |
774 | stat->blocks = attr->blocks; | |
775 | stat->blksize = (1 << inode->i_blkbits); | |
776 | } | |
777 | ||
c79e322f MS |
778 | static int fuse_do_getattr(struct inode *inode, struct kstat *stat, |
779 | struct file *file) | |
e5e5558e MS |
780 | { |
781 | int err; | |
c79e322f MS |
782 | struct fuse_getattr_in inarg; |
783 | struct fuse_attr_out outarg; | |
e5e5558e | 784 | struct fuse_conn *fc = get_fuse_conn(inode); |
1fb69e78 MS |
785 | struct fuse_req *req; |
786 | u64 attr_version; | |
787 | ||
788 | req = fuse_get_req(fc); | |
ce1d5a49 MS |
789 | if (IS_ERR(req)) |
790 | return PTR_ERR(req); | |
e5e5558e | 791 | |
7dca9fd3 | 792 | attr_version = fuse_get_attr_version(fc); |
1fb69e78 | 793 | |
c79e322f | 794 | memset(&inarg, 0, sizeof(inarg)); |
0e9663ee | 795 | memset(&outarg, 0, sizeof(outarg)); |
c79e322f MS |
796 | /* Directories have separate file-handle space */ |
797 | if (file && S_ISREG(inode->i_mode)) { | |
798 | struct fuse_file *ff = file->private_data; | |
799 | ||
800 | inarg.getattr_flags |= FUSE_GETATTR_FH; | |
801 | inarg.fh = ff->fh; | |
802 | } | |
e5e5558e MS |
803 | req->in.h.opcode = FUSE_GETATTR; |
804 | req->in.h.nodeid = get_node_id(inode); | |
c79e322f MS |
805 | req->in.numargs = 1; |
806 | req->in.args[0].size = sizeof(inarg); | |
807 | req->in.args[0].value = &inarg; | |
e5e5558e | 808 | req->out.numargs = 1; |
0e9663ee MS |
809 | if (fc->minor < 9) |
810 | req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; | |
811 | else | |
812 | req->out.args[0].size = sizeof(outarg); | |
c79e322f | 813 | req->out.args[0].value = &outarg; |
e5e5558e MS |
814 | request_send(fc, req); |
815 | err = req->out.h.error; | |
816 | fuse_put_request(fc, req); | |
817 | if (!err) { | |
c79e322f | 818 | if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) { |
e5e5558e MS |
819 | make_bad_inode(inode); |
820 | err = -EIO; | |
821 | } else { | |
c79e322f MS |
822 | fuse_change_attributes(inode, &outarg.attr, |
823 | attr_timeout(&outarg), | |
1fb69e78 MS |
824 | attr_version); |
825 | if (stat) | |
c79e322f | 826 | fuse_fillattr(inode, &outarg.attr, stat); |
e5e5558e MS |
827 | } |
828 | } | |
829 | return err; | |
830 | } | |
831 | ||
bcb4be80 MS |
832 | int fuse_update_attributes(struct inode *inode, struct kstat *stat, |
833 | struct file *file, bool *refreshed) | |
834 | { | |
835 | struct fuse_inode *fi = get_fuse_inode(inode); | |
836 | int err; | |
837 | bool r; | |
838 | ||
839 | if (fi->i_time < get_jiffies_64()) { | |
840 | r = true; | |
841 | err = fuse_do_getattr(inode, stat, file); | |
842 | } else { | |
843 | r = false; | |
844 | err = 0; | |
845 | if (stat) { | |
846 | generic_fillattr(inode, stat); | |
847 | stat->mode = fi->orig_i_mode; | |
848 | } | |
849 | } | |
850 | ||
851 | if (refreshed != NULL) | |
852 | *refreshed = r; | |
853 | ||
854 | return err; | |
855 | } | |
856 | ||
87729a55 MS |
857 | /* |
858 | * Calling into a user-controlled filesystem gives the filesystem | |
859 | * daemon ptrace-like capabilities over the requester process. This | |
860 | * means, that the filesystem daemon is able to record the exact | |
861 | * filesystem operations performed, and can also control the behavior | |
862 | * of the requester process in otherwise impossible ways. For example | |
863 | * it can delay the operation for arbitrary length of time allowing | |
864 | * DoS against the requester. | |
865 | * | |
866 | * For this reason only those processes can call into the filesystem, | |
867 | * for which the owner of the mount has ptrace privilege. This | |
868 | * excludes processes started by other users, suid or sgid processes. | |
869 | */ | |
e57ac683 | 870 | int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task) |
87729a55 MS |
871 | { |
872 | if (fc->flags & FUSE_ALLOW_OTHER) | |
873 | return 1; | |
874 | ||
875 | if (task->euid == fc->user_id && | |
876 | task->suid == fc->user_id && | |
877 | task->uid == fc->user_id && | |
878 | task->egid == fc->group_id && | |
879 | task->sgid == fc->group_id && | |
880 | task->gid == fc->group_id) | |
881 | return 1; | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
31d40d74 MS |
886 | static int fuse_access(struct inode *inode, int mask) |
887 | { | |
888 | struct fuse_conn *fc = get_fuse_conn(inode); | |
889 | struct fuse_req *req; | |
890 | struct fuse_access_in inarg; | |
891 | int err; | |
892 | ||
893 | if (fc->no_access) | |
894 | return 0; | |
895 | ||
ce1d5a49 MS |
896 | req = fuse_get_req(fc); |
897 | if (IS_ERR(req)) | |
898 | return PTR_ERR(req); | |
31d40d74 MS |
899 | |
900 | memset(&inarg, 0, sizeof(inarg)); | |
e6305c43 | 901 | inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC); |
31d40d74 MS |
902 | req->in.h.opcode = FUSE_ACCESS; |
903 | req->in.h.nodeid = get_node_id(inode); | |
31d40d74 MS |
904 | req->in.numargs = 1; |
905 | req->in.args[0].size = sizeof(inarg); | |
906 | req->in.args[0].value = &inarg; | |
907 | request_send(fc, req); | |
908 | err = req->out.h.error; | |
909 | fuse_put_request(fc, req); | |
910 | if (err == -ENOSYS) { | |
911 | fc->no_access = 1; | |
912 | err = 0; | |
913 | } | |
914 | return err; | |
915 | } | |
916 | ||
6f9f1180 MS |
917 | /* |
918 | * Check permission. The two basic access models of FUSE are: | |
919 | * | |
920 | * 1) Local access checking ('default_permissions' mount option) based | |
921 | * on file mode. This is the plain old disk filesystem permission | |
922 | * modell. | |
923 | * | |
924 | * 2) "Remote" access checking, where server is responsible for | |
925 | * checking permission in each inode operation. An exception to this | |
926 | * is if ->permission() was invoked from sys_access() in which case an | |
927 | * access request is sent. Execute permission is still checked | |
928 | * locally based on file mode. | |
929 | */ | |
e6305c43 | 930 | static int fuse_permission(struct inode *inode, int mask) |
e5e5558e MS |
931 | { |
932 | struct fuse_conn *fc = get_fuse_conn(inode); | |
244f6385 MS |
933 | bool refreshed = false; |
934 | int err = 0; | |
e5e5558e | 935 | |
87729a55 | 936 | if (!fuse_allow_task(fc, current)) |
e5e5558e | 937 | return -EACCES; |
244f6385 MS |
938 | |
939 | /* | |
e8e96157 | 940 | * If attributes are needed, refresh them before proceeding |
244f6385 | 941 | */ |
e8e96157 MS |
942 | if ((fc->flags & FUSE_DEFAULT_PERMISSIONS) || |
943 | ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) { | |
bcb4be80 MS |
944 | err = fuse_update_attributes(inode, NULL, NULL, &refreshed); |
945 | if (err) | |
946 | return err; | |
244f6385 MS |
947 | } |
948 | ||
949 | if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { | |
1a823ac9 | 950 | err = generic_permission(inode, mask, NULL); |
1e9a4ed9 MS |
951 | |
952 | /* If permission is denied, try to refresh file | |
953 | attributes. This is also needed, because the root | |
954 | node will at first have no permissions */ | |
244f6385 | 955 | if (err == -EACCES && !refreshed) { |
c79e322f | 956 | err = fuse_do_getattr(inode, NULL, NULL); |
1e9a4ed9 MS |
957 | if (!err) |
958 | err = generic_permission(inode, mask, NULL); | |
959 | } | |
960 | ||
6f9f1180 MS |
961 | /* Note: the opposite of the above test does not |
962 | exist. So if permissions are revoked this won't be | |
963 | noticed immediately, only after the attribute | |
964 | timeout has expired */ | |
a110343f | 965 | } else if (mask & MAY_ACCESS) { |
e8e96157 MS |
966 | err = fuse_access(inode, mask); |
967 | } else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) { | |
968 | if (!(inode->i_mode & S_IXUGO)) { | |
969 | if (refreshed) | |
970 | return -EACCES; | |
971 | ||
c79e322f | 972 | err = fuse_do_getattr(inode, NULL, NULL); |
e8e96157 MS |
973 | if (!err && !(inode->i_mode & S_IXUGO)) |
974 | return -EACCES; | |
975 | } | |
e5e5558e | 976 | } |
244f6385 | 977 | return err; |
e5e5558e MS |
978 | } |
979 | ||
980 | static int parse_dirfile(char *buf, size_t nbytes, struct file *file, | |
981 | void *dstbuf, filldir_t filldir) | |
982 | { | |
983 | while (nbytes >= FUSE_NAME_OFFSET) { | |
984 | struct fuse_dirent *dirent = (struct fuse_dirent *) buf; | |
985 | size_t reclen = FUSE_DIRENT_SIZE(dirent); | |
986 | int over; | |
987 | if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX) | |
988 | return -EIO; | |
989 | if (reclen > nbytes) | |
990 | break; | |
991 | ||
992 | over = filldir(dstbuf, dirent->name, dirent->namelen, | |
993 | file->f_pos, dirent->ino, dirent->type); | |
994 | if (over) | |
995 | break; | |
996 | ||
997 | buf += reclen; | |
998 | nbytes -= reclen; | |
999 | file->f_pos = dirent->off; | |
1000 | } | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
04730fef | 1005 | static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) |
e5e5558e | 1006 | { |
04730fef MS |
1007 | int err; |
1008 | size_t nbytes; | |
1009 | struct page *page; | |
7706a9d6 | 1010 | struct inode *inode = file->f_path.dentry->d_inode; |
e5e5558e | 1011 | struct fuse_conn *fc = get_fuse_conn(inode); |
248d86e8 MS |
1012 | struct fuse_req *req; |
1013 | ||
1014 | if (is_bad_inode(inode)) | |
1015 | return -EIO; | |
1016 | ||
ce1d5a49 MS |
1017 | req = fuse_get_req(fc); |
1018 | if (IS_ERR(req)) | |
1019 | return PTR_ERR(req); | |
e5e5558e | 1020 | |
04730fef MS |
1021 | page = alloc_page(GFP_KERNEL); |
1022 | if (!page) { | |
1023 | fuse_put_request(fc, req); | |
1024 | return -ENOMEM; | |
1025 | } | |
1026 | req->num_pages = 1; | |
1027 | req->pages[0] = page; | |
a6643094 | 1028 | fuse_read_fill(req, file, inode, file->f_pos, PAGE_SIZE, FUSE_READDIR); |
361b1eb5 MS |
1029 | request_send(fc, req); |
1030 | nbytes = req->out.args[0].size; | |
e5e5558e MS |
1031 | err = req->out.h.error; |
1032 | fuse_put_request(fc, req); | |
1033 | if (!err) | |
04730fef MS |
1034 | err = parse_dirfile(page_address(page), nbytes, file, dstbuf, |
1035 | filldir); | |
e5e5558e | 1036 | |
04730fef | 1037 | __free_page(page); |
b36c31ba | 1038 | fuse_invalidate_attr(inode); /* atime changed */ |
04730fef | 1039 | return err; |
e5e5558e MS |
1040 | } |
1041 | ||
1042 | static char *read_link(struct dentry *dentry) | |
1043 | { | |
1044 | struct inode *inode = dentry->d_inode; | |
1045 | struct fuse_conn *fc = get_fuse_conn(inode); | |
ce1d5a49 | 1046 | struct fuse_req *req = fuse_get_req(fc); |
e5e5558e MS |
1047 | char *link; |
1048 | ||
ce1d5a49 | 1049 | if (IS_ERR(req)) |
e231c2ee | 1050 | return ERR_CAST(req); |
e5e5558e MS |
1051 | |
1052 | link = (char *) __get_free_page(GFP_KERNEL); | |
1053 | if (!link) { | |
1054 | link = ERR_PTR(-ENOMEM); | |
1055 | goto out; | |
1056 | } | |
1057 | req->in.h.opcode = FUSE_READLINK; | |
1058 | req->in.h.nodeid = get_node_id(inode); | |
e5e5558e MS |
1059 | req->out.argvar = 1; |
1060 | req->out.numargs = 1; | |
1061 | req->out.args[0].size = PAGE_SIZE - 1; | |
1062 | req->out.args[0].value = link; | |
1063 | request_send(fc, req); | |
1064 | if (req->out.h.error) { | |
1065 | free_page((unsigned long) link); | |
1066 | link = ERR_PTR(req->out.h.error); | |
1067 | } else | |
1068 | link[req->out.args[0].size] = '\0'; | |
1069 | out: | |
1070 | fuse_put_request(fc, req); | |
b36c31ba | 1071 | fuse_invalidate_attr(inode); /* atime changed */ |
e5e5558e MS |
1072 | return link; |
1073 | } | |
1074 | ||
1075 | static void free_link(char *link) | |
1076 | { | |
1077 | if (!IS_ERR(link)) | |
1078 | free_page((unsigned long) link); | |
1079 | } | |
1080 | ||
1081 | static void *fuse_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1082 | { | |
1083 | nd_set_link(nd, read_link(dentry)); | |
1084 | return NULL; | |
1085 | } | |
1086 | ||
1087 | static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c) | |
1088 | { | |
1089 | free_link(nd_get_link(nd)); | |
1090 | } | |
1091 | ||
1092 | static int fuse_dir_open(struct inode *inode, struct file *file) | |
1093 | { | |
04730fef | 1094 | return fuse_open_common(inode, file, 1); |
e5e5558e MS |
1095 | } |
1096 | ||
1097 | static int fuse_dir_release(struct inode *inode, struct file *file) | |
1098 | { | |
04730fef | 1099 | return fuse_release_common(inode, file, 1); |
e5e5558e MS |
1100 | } |
1101 | ||
82547981 MS |
1102 | static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync) |
1103 | { | |
1104 | /* nfsd can call this with no file */ | |
1105 | return file ? fuse_fsync_common(file, de, datasync, 1) : 0; | |
1106 | } | |
1107 | ||
17637cba MS |
1108 | static bool update_mtime(unsigned ivalid) |
1109 | { | |
1110 | /* Always update if mtime is explicitly set */ | |
1111 | if (ivalid & ATTR_MTIME_SET) | |
1112 | return true; | |
1113 | ||
1114 | /* If it's an open(O_TRUNC) or an ftruncate(), don't update */ | |
1115 | if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE))) | |
1116 | return false; | |
1117 | ||
1118 | /* In all other cases update */ | |
1119 | return true; | |
1120 | } | |
1121 | ||
befc649c | 1122 | static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg) |
9e6268db MS |
1123 | { |
1124 | unsigned ivalid = iattr->ia_valid; | |
9e6268db MS |
1125 | |
1126 | if (ivalid & ATTR_MODE) | |
befc649c | 1127 | arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode; |
9e6268db | 1128 | if (ivalid & ATTR_UID) |
befc649c | 1129 | arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid; |
9e6268db | 1130 | if (ivalid & ATTR_GID) |
befc649c | 1131 | arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid; |
9e6268db | 1132 | if (ivalid & ATTR_SIZE) |
befc649c | 1133 | arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size; |
17637cba MS |
1134 | if (ivalid & ATTR_ATIME) { |
1135 | arg->valid |= FATTR_ATIME; | |
befc649c | 1136 | arg->atime = iattr->ia_atime.tv_sec; |
17637cba MS |
1137 | arg->atimensec = iattr->ia_atime.tv_nsec; |
1138 | if (!(ivalid & ATTR_ATIME_SET)) | |
1139 | arg->valid |= FATTR_ATIME_NOW; | |
1140 | } | |
1141 | if ((ivalid & ATTR_MTIME) && update_mtime(ivalid)) { | |
1142 | arg->valid |= FATTR_MTIME; | |
befc649c | 1143 | arg->mtime = iattr->ia_mtime.tv_sec; |
17637cba MS |
1144 | arg->mtimensec = iattr->ia_mtime.tv_nsec; |
1145 | if (!(ivalid & ATTR_MTIME_SET)) | |
1146 | arg->valid |= FATTR_MTIME_NOW; | |
befc649c | 1147 | } |
9e6268db MS |
1148 | } |
1149 | ||
3be5a52b MS |
1150 | /* |
1151 | * Prevent concurrent writepages on inode | |
1152 | * | |
1153 | * This is done by adding a negative bias to the inode write counter | |
1154 | * and waiting for all pending writes to finish. | |
1155 | */ | |
1156 | void fuse_set_nowrite(struct inode *inode) | |
1157 | { | |
1158 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1159 | struct fuse_inode *fi = get_fuse_inode(inode); | |
1160 | ||
1161 | BUG_ON(!mutex_is_locked(&inode->i_mutex)); | |
1162 | ||
1163 | spin_lock(&fc->lock); | |
1164 | BUG_ON(fi->writectr < 0); | |
1165 | fi->writectr += FUSE_NOWRITE; | |
1166 | spin_unlock(&fc->lock); | |
1167 | wait_event(fi->page_waitq, fi->writectr == FUSE_NOWRITE); | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Allow writepages on inode | |
1172 | * | |
1173 | * Remove the bias from the writecounter and send any queued | |
1174 | * writepages. | |
1175 | */ | |
1176 | static void __fuse_release_nowrite(struct inode *inode) | |
1177 | { | |
1178 | struct fuse_inode *fi = get_fuse_inode(inode); | |
1179 | ||
1180 | BUG_ON(fi->writectr != FUSE_NOWRITE); | |
1181 | fi->writectr = 0; | |
1182 | fuse_flush_writepages(inode); | |
1183 | } | |
1184 | ||
1185 | void fuse_release_nowrite(struct inode *inode) | |
1186 | { | |
1187 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1188 | ||
1189 | spin_lock(&fc->lock); | |
1190 | __fuse_release_nowrite(inode); | |
1191 | spin_unlock(&fc->lock); | |
1192 | } | |
1193 | ||
6f9f1180 MS |
1194 | /* |
1195 | * Set attributes, and at the same time refresh them. | |
1196 | * | |
1197 | * Truncation is slightly complicated, because the 'truncate' request | |
1198 | * may fail, in which case we don't want to touch the mapping. | |
9ffbb916 MS |
1199 | * vmtruncate() doesn't allow for this case, so do the rlimit checking |
1200 | * and the actual truncation by hand. | |
6f9f1180 | 1201 | */ |
49d4914f MS |
1202 | static int fuse_do_setattr(struct dentry *entry, struct iattr *attr, |
1203 | struct file *file) | |
9e6268db MS |
1204 | { |
1205 | struct inode *inode = entry->d_inode; | |
1206 | struct fuse_conn *fc = get_fuse_conn(inode); | |
9e6268db MS |
1207 | struct fuse_req *req; |
1208 | struct fuse_setattr_in inarg; | |
1209 | struct fuse_attr_out outarg; | |
3be5a52b MS |
1210 | bool is_truncate = false; |
1211 | loff_t oldsize; | |
9e6268db | 1212 | int err; |
9e6268db | 1213 | |
e57ac683 MS |
1214 | if (!fuse_allow_task(fc, current)) |
1215 | return -EACCES; | |
1216 | ||
1e9a4ed9 MS |
1217 | if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
1218 | err = inode_change_ok(inode, attr); | |
1219 | if (err) | |
1220 | return err; | |
1221 | } | |
1222 | ||
6ff958ed MS |
1223 | if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc) |
1224 | return 0; | |
1225 | ||
9e6268db MS |
1226 | if (attr->ia_valid & ATTR_SIZE) { |
1227 | unsigned long limit; | |
b2d2272f MS |
1228 | if (IS_SWAPFILE(inode)) |
1229 | return -ETXTBSY; | |
9e6268db MS |
1230 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; |
1231 | if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) { | |
1232 | send_sig(SIGXFSZ, current, 0); | |
1233 | return -EFBIG; | |
1234 | } | |
3be5a52b | 1235 | is_truncate = true; |
9e6268db MS |
1236 | } |
1237 | ||
ce1d5a49 MS |
1238 | req = fuse_get_req(fc); |
1239 | if (IS_ERR(req)) | |
1240 | return PTR_ERR(req); | |
9e6268db | 1241 | |
3be5a52b MS |
1242 | if (is_truncate) |
1243 | fuse_set_nowrite(inode); | |
1244 | ||
9e6268db | 1245 | memset(&inarg, 0, sizeof(inarg)); |
0e9663ee | 1246 | memset(&outarg, 0, sizeof(outarg)); |
befc649c | 1247 | iattr_to_fattr(attr, &inarg); |
49d4914f MS |
1248 | if (file) { |
1249 | struct fuse_file *ff = file->private_data; | |
1250 | inarg.valid |= FATTR_FH; | |
1251 | inarg.fh = ff->fh; | |
1252 | } | |
f3332114 MS |
1253 | if (attr->ia_valid & ATTR_SIZE) { |
1254 | /* For mandatory locking in truncate */ | |
1255 | inarg.valid |= FATTR_LOCKOWNER; | |
1256 | inarg.lock_owner = fuse_lock_owner_id(fc, current->files); | |
1257 | } | |
9e6268db MS |
1258 | req->in.h.opcode = FUSE_SETATTR; |
1259 | req->in.h.nodeid = get_node_id(inode); | |
9e6268db MS |
1260 | req->in.numargs = 1; |
1261 | req->in.args[0].size = sizeof(inarg); | |
1262 | req->in.args[0].value = &inarg; | |
1263 | req->out.numargs = 1; | |
0e9663ee MS |
1264 | if (fc->minor < 9) |
1265 | req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE; | |
1266 | else | |
1267 | req->out.args[0].size = sizeof(outarg); | |
9e6268db MS |
1268 | req->out.args[0].value = &outarg; |
1269 | request_send(fc, req); | |
1270 | err = req->out.h.error; | |
1271 | fuse_put_request(fc, req); | |
e00d2c2d MS |
1272 | if (err) { |
1273 | if (err == -EINTR) | |
1274 | fuse_invalidate_attr(inode); | |
3be5a52b | 1275 | goto error; |
e00d2c2d | 1276 | } |
9e6268db | 1277 | |
e00d2c2d MS |
1278 | if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) { |
1279 | make_bad_inode(inode); | |
3be5a52b MS |
1280 | err = -EIO; |
1281 | goto error; | |
1282 | } | |
1283 | ||
1284 | spin_lock(&fc->lock); | |
1285 | fuse_change_attributes_common(inode, &outarg.attr, | |
1286 | attr_timeout(&outarg)); | |
1287 | oldsize = inode->i_size; | |
1288 | i_size_write(inode, outarg.attr.size); | |
1289 | ||
1290 | if (is_truncate) { | |
1291 | /* NOTE: this may release/reacquire fc->lock */ | |
1292 | __fuse_release_nowrite(inode); | |
1293 | } | |
1294 | spin_unlock(&fc->lock); | |
1295 | ||
1296 | /* | |
1297 | * Only call invalidate_inode_pages2() after removing | |
1298 | * FUSE_NOWRITE, otherwise fuse_launder_page() would deadlock. | |
1299 | */ | |
1300 | if (S_ISREG(inode->i_mode) && oldsize != outarg.attr.size) { | |
1301 | if (outarg.attr.size < oldsize) | |
1302 | fuse_truncate(inode->i_mapping, outarg.attr.size); | |
1303 | invalidate_inode_pages2(inode->i_mapping); | |
e00d2c2d MS |
1304 | } |
1305 | ||
e00d2c2d | 1306 | return 0; |
3be5a52b MS |
1307 | |
1308 | error: | |
1309 | if (is_truncate) | |
1310 | fuse_release_nowrite(inode); | |
1311 | ||
1312 | return err; | |
9e6268db MS |
1313 | } |
1314 | ||
49d4914f MS |
1315 | static int fuse_setattr(struct dentry *entry, struct iattr *attr) |
1316 | { | |
1317 | if (attr->ia_valid & ATTR_FILE) | |
1318 | return fuse_do_setattr(entry, attr, attr->ia_file); | |
1319 | else | |
1320 | return fuse_do_setattr(entry, attr, NULL); | |
1321 | } | |
1322 | ||
e5e5558e MS |
1323 | static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, |
1324 | struct kstat *stat) | |
1325 | { | |
1326 | struct inode *inode = entry->d_inode; | |
244f6385 | 1327 | struct fuse_conn *fc = get_fuse_conn(inode); |
244f6385 MS |
1328 | |
1329 | if (!fuse_allow_task(fc, current)) | |
1330 | return -EACCES; | |
1331 | ||
bcb4be80 | 1332 | return fuse_update_attributes(inode, stat, NULL, NULL); |
e5e5558e MS |
1333 | } |
1334 | ||
92a8780e MS |
1335 | static int fuse_setxattr(struct dentry *entry, const char *name, |
1336 | const void *value, size_t size, int flags) | |
1337 | { | |
1338 | struct inode *inode = entry->d_inode; | |
1339 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1340 | struct fuse_req *req; | |
1341 | struct fuse_setxattr_in inarg; | |
1342 | int err; | |
1343 | ||
92a8780e MS |
1344 | if (fc->no_setxattr) |
1345 | return -EOPNOTSUPP; | |
1346 | ||
ce1d5a49 MS |
1347 | req = fuse_get_req(fc); |
1348 | if (IS_ERR(req)) | |
1349 | return PTR_ERR(req); | |
92a8780e MS |
1350 | |
1351 | memset(&inarg, 0, sizeof(inarg)); | |
1352 | inarg.size = size; | |
1353 | inarg.flags = flags; | |
1354 | req->in.h.opcode = FUSE_SETXATTR; | |
1355 | req->in.h.nodeid = get_node_id(inode); | |
92a8780e MS |
1356 | req->in.numargs = 3; |
1357 | req->in.args[0].size = sizeof(inarg); | |
1358 | req->in.args[0].value = &inarg; | |
1359 | req->in.args[1].size = strlen(name) + 1; | |
1360 | req->in.args[1].value = name; | |
1361 | req->in.args[2].size = size; | |
1362 | req->in.args[2].value = value; | |
1363 | request_send(fc, req); | |
1364 | err = req->out.h.error; | |
1365 | fuse_put_request(fc, req); | |
1366 | if (err == -ENOSYS) { | |
1367 | fc->no_setxattr = 1; | |
1368 | err = -EOPNOTSUPP; | |
1369 | } | |
1370 | return err; | |
1371 | } | |
1372 | ||
1373 | static ssize_t fuse_getxattr(struct dentry *entry, const char *name, | |
1374 | void *value, size_t size) | |
1375 | { | |
1376 | struct inode *inode = entry->d_inode; | |
1377 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1378 | struct fuse_req *req; | |
1379 | struct fuse_getxattr_in inarg; | |
1380 | struct fuse_getxattr_out outarg; | |
1381 | ssize_t ret; | |
1382 | ||
1383 | if (fc->no_getxattr) | |
1384 | return -EOPNOTSUPP; | |
1385 | ||
ce1d5a49 MS |
1386 | req = fuse_get_req(fc); |
1387 | if (IS_ERR(req)) | |
1388 | return PTR_ERR(req); | |
92a8780e MS |
1389 | |
1390 | memset(&inarg, 0, sizeof(inarg)); | |
1391 | inarg.size = size; | |
1392 | req->in.h.opcode = FUSE_GETXATTR; | |
1393 | req->in.h.nodeid = get_node_id(inode); | |
92a8780e MS |
1394 | req->in.numargs = 2; |
1395 | req->in.args[0].size = sizeof(inarg); | |
1396 | req->in.args[0].value = &inarg; | |
1397 | req->in.args[1].size = strlen(name) + 1; | |
1398 | req->in.args[1].value = name; | |
1399 | /* This is really two different operations rolled into one */ | |
1400 | req->out.numargs = 1; | |
1401 | if (size) { | |
1402 | req->out.argvar = 1; | |
1403 | req->out.args[0].size = size; | |
1404 | req->out.args[0].value = value; | |
1405 | } else { | |
1406 | req->out.args[0].size = sizeof(outarg); | |
1407 | req->out.args[0].value = &outarg; | |
1408 | } | |
1409 | request_send(fc, req); | |
1410 | ret = req->out.h.error; | |
1411 | if (!ret) | |
1412 | ret = size ? req->out.args[0].size : outarg.size; | |
1413 | else { | |
1414 | if (ret == -ENOSYS) { | |
1415 | fc->no_getxattr = 1; | |
1416 | ret = -EOPNOTSUPP; | |
1417 | } | |
1418 | } | |
1419 | fuse_put_request(fc, req); | |
1420 | return ret; | |
1421 | } | |
1422 | ||
1423 | static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) | |
1424 | { | |
1425 | struct inode *inode = entry->d_inode; | |
1426 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1427 | struct fuse_req *req; | |
1428 | struct fuse_getxattr_in inarg; | |
1429 | struct fuse_getxattr_out outarg; | |
1430 | ssize_t ret; | |
1431 | ||
e57ac683 MS |
1432 | if (!fuse_allow_task(fc, current)) |
1433 | return -EACCES; | |
1434 | ||
92a8780e MS |
1435 | if (fc->no_listxattr) |
1436 | return -EOPNOTSUPP; | |
1437 | ||
ce1d5a49 MS |
1438 | req = fuse_get_req(fc); |
1439 | if (IS_ERR(req)) | |
1440 | return PTR_ERR(req); | |
92a8780e MS |
1441 | |
1442 | memset(&inarg, 0, sizeof(inarg)); | |
1443 | inarg.size = size; | |
1444 | req->in.h.opcode = FUSE_LISTXATTR; | |
1445 | req->in.h.nodeid = get_node_id(inode); | |
92a8780e MS |
1446 | req->in.numargs = 1; |
1447 | req->in.args[0].size = sizeof(inarg); | |
1448 | req->in.args[0].value = &inarg; | |
1449 | /* This is really two different operations rolled into one */ | |
1450 | req->out.numargs = 1; | |
1451 | if (size) { | |
1452 | req->out.argvar = 1; | |
1453 | req->out.args[0].size = size; | |
1454 | req->out.args[0].value = list; | |
1455 | } else { | |
1456 | req->out.args[0].size = sizeof(outarg); | |
1457 | req->out.args[0].value = &outarg; | |
1458 | } | |
1459 | request_send(fc, req); | |
1460 | ret = req->out.h.error; | |
1461 | if (!ret) | |
1462 | ret = size ? req->out.args[0].size : outarg.size; | |
1463 | else { | |
1464 | if (ret == -ENOSYS) { | |
1465 | fc->no_listxattr = 1; | |
1466 | ret = -EOPNOTSUPP; | |
1467 | } | |
1468 | } | |
1469 | fuse_put_request(fc, req); | |
1470 | return ret; | |
1471 | } | |
1472 | ||
1473 | static int fuse_removexattr(struct dentry *entry, const char *name) | |
1474 | { | |
1475 | struct inode *inode = entry->d_inode; | |
1476 | struct fuse_conn *fc = get_fuse_conn(inode); | |
1477 | struct fuse_req *req; | |
1478 | int err; | |
1479 | ||
1480 | if (fc->no_removexattr) | |
1481 | return -EOPNOTSUPP; | |
1482 | ||
ce1d5a49 MS |
1483 | req = fuse_get_req(fc); |
1484 | if (IS_ERR(req)) | |
1485 | return PTR_ERR(req); | |
92a8780e MS |
1486 | |
1487 | req->in.h.opcode = FUSE_REMOVEXATTR; | |
1488 | req->in.h.nodeid = get_node_id(inode); | |
92a8780e MS |
1489 | req->in.numargs = 1; |
1490 | req->in.args[0].size = strlen(name) + 1; | |
1491 | req->in.args[0].value = name; | |
1492 | request_send(fc, req); | |
1493 | err = req->out.h.error; | |
1494 | fuse_put_request(fc, req); | |
1495 | if (err == -ENOSYS) { | |
1496 | fc->no_removexattr = 1; | |
1497 | err = -EOPNOTSUPP; | |
1498 | } | |
1499 | return err; | |
1500 | } | |
1501 | ||
754661f1 | 1502 | static const struct inode_operations fuse_dir_inode_operations = { |
e5e5558e | 1503 | .lookup = fuse_lookup, |
9e6268db MS |
1504 | .mkdir = fuse_mkdir, |
1505 | .symlink = fuse_symlink, | |
1506 | .unlink = fuse_unlink, | |
1507 | .rmdir = fuse_rmdir, | |
1508 | .rename = fuse_rename, | |
1509 | .link = fuse_link, | |
1510 | .setattr = fuse_setattr, | |
1511 | .create = fuse_create, | |
1512 | .mknod = fuse_mknod, | |
e5e5558e MS |
1513 | .permission = fuse_permission, |
1514 | .getattr = fuse_getattr, | |
92a8780e MS |
1515 | .setxattr = fuse_setxattr, |
1516 | .getxattr = fuse_getxattr, | |
1517 | .listxattr = fuse_listxattr, | |
1518 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1519 | }; |
1520 | ||
4b6f5d20 | 1521 | static const struct file_operations fuse_dir_operations = { |
b6aeaded | 1522 | .llseek = generic_file_llseek, |
e5e5558e MS |
1523 | .read = generic_read_dir, |
1524 | .readdir = fuse_readdir, | |
1525 | .open = fuse_dir_open, | |
1526 | .release = fuse_dir_release, | |
82547981 | 1527 | .fsync = fuse_dir_fsync, |
e5e5558e MS |
1528 | }; |
1529 | ||
754661f1 | 1530 | static const struct inode_operations fuse_common_inode_operations = { |
9e6268db | 1531 | .setattr = fuse_setattr, |
e5e5558e MS |
1532 | .permission = fuse_permission, |
1533 | .getattr = fuse_getattr, | |
92a8780e MS |
1534 | .setxattr = fuse_setxattr, |
1535 | .getxattr = fuse_getxattr, | |
1536 | .listxattr = fuse_listxattr, | |
1537 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1538 | }; |
1539 | ||
754661f1 | 1540 | static const struct inode_operations fuse_symlink_inode_operations = { |
9e6268db | 1541 | .setattr = fuse_setattr, |
e5e5558e MS |
1542 | .follow_link = fuse_follow_link, |
1543 | .put_link = fuse_put_link, | |
1544 | .readlink = generic_readlink, | |
1545 | .getattr = fuse_getattr, | |
92a8780e MS |
1546 | .setxattr = fuse_setxattr, |
1547 | .getxattr = fuse_getxattr, | |
1548 | .listxattr = fuse_listxattr, | |
1549 | .removexattr = fuse_removexattr, | |
e5e5558e MS |
1550 | }; |
1551 | ||
1552 | void fuse_init_common(struct inode *inode) | |
1553 | { | |
1554 | inode->i_op = &fuse_common_inode_operations; | |
1555 | } | |
1556 | ||
1557 | void fuse_init_dir(struct inode *inode) | |
1558 | { | |
1559 | inode->i_op = &fuse_dir_inode_operations; | |
1560 | inode->i_fop = &fuse_dir_operations; | |
1561 | } | |
1562 | ||
1563 | void fuse_init_symlink(struct inode *inode) | |
1564 | { | |
1565 | inode->i_op = &fuse_symlink_inode_operations; | |
1566 | } |