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1 | /* |
2 | * linux/fs/ioctl.c |
3 | * |
4 | * Copyright (C) 1991, 1992 Linus Torvalds |
5 | */ |
6 | |
7 | #include <linux/syscalls.h> |
8 | #include <linux/mm.h> |
9 | #include <linux/smp_lock.h> |
10 | #include <linux/capability.h> |
11 | #include <linux/file.h> |
12 | #include <linux/fs.h> |
13 | #include <linux/security.h> |
14 | #include <linux/module.h> |
15 | #include <linux/uaccess.h> |
16 | #include <linux/writeback.h> |
17 | #include <linux/buffer_head.h> |
18 | #include <linux/falloc.h> |
19 | |
20 | #include <asm/ioctls.h> |
21 | |
22 | /* So that the fiemap access checks can't overflow on 32 bit machines. */ |
23 | #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) |
24 | |
25 | /** |
26 | * vfs_ioctl - call filesystem specific ioctl methods |
27 | * @filp: open file to invoke ioctl method on |
28 | * @cmd: ioctl command to execute |
29 | * @arg: command-specific argument for ioctl |
30 | * |
31 | * Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise |
32 | * invokes filesystem specific ->ioctl method. If neither method exists, |
33 | * returns -ENOTTY. |
34 | * |
35 | * Returns 0 on success, -errno on error. |
36 | */ |
37 | static long vfs_ioctl(struct file *filp, unsigned int cmd, |
38 | unsigned long arg) |
39 | { |
40 | int error = -ENOTTY; |
41 | |
42 | if (!filp->f_op) |
43 | goto out; |
44 | |
45 | if (filp->f_op->unlocked_ioctl) { |
46 | error = filp->f_op->unlocked_ioctl(filp, cmd, arg); |
47 | if (error == -ENOIOCTLCMD) |
48 | error = -EINVAL; |
49 | goto out; |
50 | } else if (filp->f_op->ioctl) { |
51 | lock_kernel(); |
52 | error = filp->f_op->ioctl(filp->f_path.dentry->d_inode, |
53 | filp, cmd, arg); |
54 | unlock_kernel(); |
55 | } |
56 | |
57 | out: |
58 | return error; |
59 | } |
60 | |
61 | static int ioctl_fibmap(struct file *filp, int __user *p) |
62 | { |
63 | struct address_space *mapping = filp->f_mapping; |
64 | int res, block; |
65 | |
66 | /* do we support this mess? */ |
67 | if (!mapping->a_ops->bmap) |
68 | return -EINVAL; |
69 | if (!capable(CAP_SYS_RAWIO)) |
70 | return -EPERM; |
71 | res = get_user(block, p); |
72 | if (res) |
73 | return res; |
74 | res = mapping->a_ops->bmap(mapping, block); |
75 | return put_user(res, p); |
76 | } |
77 | |
78 | /** |
79 | * fiemap_fill_next_extent - Fiemap helper function |
80 | * @fieinfo: Fiemap context passed into ->fiemap |
81 | * @logical: Extent logical start offset, in bytes |
82 | * @phys: Extent physical start offset, in bytes |
83 | * @len: Extent length, in bytes |
84 | * @flags: FIEMAP_EXTENT flags that describe this extent |
85 | * |
86 | * Called from file system ->fiemap callback. Will populate extent |
87 | * info as passed in via arguments and copy to user memory. On |
88 | * success, extent count on fieinfo is incremented. |
89 | * |
90 | * Returns 0 on success, -errno on error, 1 if this was the last |
91 | * extent that will fit in user array. |
92 | */ |
93 | #define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC) |
94 | #define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED) |
95 | #define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE) |
96 | int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical, |
97 | u64 phys, u64 len, u32 flags) |
98 | { |
99 | struct fiemap_extent extent; |
100 | struct fiemap_extent *dest = fieinfo->fi_extents_start; |
101 | |
102 | /* only count the extents */ |
103 | if (fieinfo->fi_extents_max == 0) { |
104 | fieinfo->fi_extents_mapped++; |
105 | return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0; |
106 | } |
107 | |
108 | if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max) |
109 | return 1; |
110 | |
111 | if (flags & SET_UNKNOWN_FLAGS) |
112 | flags |= FIEMAP_EXTENT_UNKNOWN; |
113 | if (flags & SET_NO_UNMOUNTED_IO_FLAGS) |
114 | flags |= FIEMAP_EXTENT_ENCODED; |
115 | if (flags & SET_NOT_ALIGNED_FLAGS) |
116 | flags |= FIEMAP_EXTENT_NOT_ALIGNED; |
117 | |
118 | memset(&extent, 0, sizeof(extent)); |
119 | extent.fe_logical = logical; |
120 | extent.fe_physical = phys; |
121 | extent.fe_length = len; |
122 | extent.fe_flags = flags; |
123 | |
124 | dest += fieinfo->fi_extents_mapped; |
125 | if (copy_to_user(dest, &extent, sizeof(extent))) |
126 | return -EFAULT; |
127 | |
128 | fieinfo->fi_extents_mapped++; |
129 | if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max) |
130 | return 1; |
131 | return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0; |
132 | } |
133 | EXPORT_SYMBOL(fiemap_fill_next_extent); |
134 | |
135 | /** |
136 | * fiemap_check_flags - check validity of requested flags for fiemap |
137 | * @fieinfo: Fiemap context passed into ->fiemap |
138 | * @fs_flags: Set of fiemap flags that the file system understands |
139 | * |
140 | * Called from file system ->fiemap callback. This will compute the |
141 | * intersection of valid fiemap flags and those that the fs supports. That |
142 | * value is then compared against the user supplied flags. In case of bad user |
143 | * flags, the invalid values will be written into the fieinfo structure, and |
144 | * -EBADR is returned, which tells ioctl_fiemap() to return those values to |
145 | * userspace. For this reason, a return code of -EBADR should be preserved. |
146 | * |
147 | * Returns 0 on success, -EBADR on bad flags. |
148 | */ |
149 | int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags) |
150 | { |
151 | u32 incompat_flags; |
152 | |
153 | incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags); |
154 | if (incompat_flags) { |
155 | fieinfo->fi_flags = incompat_flags; |
156 | return -EBADR; |
157 | } |
158 | return 0; |
159 | } |
160 | EXPORT_SYMBOL(fiemap_check_flags); |
161 | |
162 | static int fiemap_check_ranges(struct super_block *sb, |
163 | u64 start, u64 len, u64 *new_len) |
164 | { |
165 | u64 maxbytes = (u64) sb->s_maxbytes; |
166 | |
167 | *new_len = len; |
168 | |
169 | if (len == 0) |
170 | return -EINVAL; |
171 | |
172 | if (start > maxbytes) |
173 | return -EFBIG; |
174 | |
175 | /* |
176 | * Shrink request scope to what the fs can actually handle. |
177 | */ |
178 | if (len > maxbytes || (maxbytes - len) < start) |
179 | *new_len = maxbytes - start; |
180 | |
181 | return 0; |
182 | } |
183 | |
184 | static int ioctl_fiemap(struct file *filp, unsigned long arg) |
185 | { |
186 | struct fiemap fiemap; |
187 | struct fiemap_extent_info fieinfo = { 0, }; |
188 | struct inode *inode = filp->f_path.dentry->d_inode; |
189 | struct super_block *sb = inode->i_sb; |
190 | u64 len; |
191 | int error; |
192 | |
193 | if (!inode->i_op->fiemap) |
194 | return -EOPNOTSUPP; |
195 | |
196 | if (copy_from_user(&fiemap, (struct fiemap __user *)arg, |
197 | sizeof(struct fiemap))) |
198 | return -EFAULT; |
199 | |
200 | if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) |
201 | return -EINVAL; |
202 | |
203 | error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length, |
204 | &len); |
205 | if (error) |
206 | return error; |
207 | |
208 | fieinfo.fi_flags = fiemap.fm_flags; |
209 | fieinfo.fi_extents_max = fiemap.fm_extent_count; |
210 | fieinfo.fi_extents_start = (struct fiemap_extent *)(arg + sizeof(fiemap)); |
211 | |
212 | if (fiemap.fm_extent_count != 0 && |
213 | !access_ok(VERIFY_WRITE, fieinfo.fi_extents_start, |
214 | fieinfo.fi_extents_max * sizeof(struct fiemap_extent))) |
215 | return -EFAULT; |
216 | |
217 | if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC) |
218 | filemap_write_and_wait(inode->i_mapping); |
219 | |
220 | error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len); |
221 | fiemap.fm_flags = fieinfo.fi_flags; |
222 | fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; |
223 | if (copy_to_user((char *)arg, &fiemap, sizeof(fiemap))) |
224 | error = -EFAULT; |
225 | |
226 | return error; |
227 | } |
228 | |
229 | #ifdef CONFIG_BLOCK |
230 | |
231 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
232 | { |
233 | return (offset >> inode->i_blkbits); |
234 | } |
235 | |
236 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) |
237 | { |
238 | return (blk << inode->i_blkbits); |
239 | } |
240 | |
241 | /** |
242 | * __generic_block_fiemap - FIEMAP for block based inodes (no locking) |
243 | * @inode: the inode to map |
244 | * @fieinfo: the fiemap info struct that will be passed back to userspace |
245 | * @start: where to start mapping in the inode |
246 | * @len: how much space to map |
247 | * @get_block: the fs's get_block function |
248 | * |
249 | * This does FIEMAP for block based inodes. Basically it will just loop |
250 | * through get_block until we hit the number of extents we want to map, or we |
251 | * go past the end of the file and hit a hole. |
252 | * |
253 | * If it is possible to have data blocks beyond a hole past @inode->i_size, then |
254 | * please do not use this function, it will stop at the first unmapped block |
255 | * beyond i_size. |
256 | * |
257 | * If you use this function directly, you need to do your own locking. Use |
258 | * generic_block_fiemap if you want the locking done for you. |
259 | */ |
260 | |
261 | int __generic_block_fiemap(struct inode *inode, |
262 | struct fiemap_extent_info *fieinfo, loff_t start, |
263 | loff_t len, get_block_t *get_block) |
264 | { |
265 | struct buffer_head map_bh; |
266 | sector_t start_blk, last_blk; |
267 | loff_t isize = i_size_read(inode); |
268 | u64 logical = 0, phys = 0, size = 0; |
269 | u32 flags = FIEMAP_EXTENT_MERGED; |
270 | bool past_eof = false, whole_file = false; |
271 | int ret = 0; |
272 | |
273 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); |
274 | if (ret) |
275 | return ret; |
276 | |
277 | /* |
278 | * Either the i_mutex or other appropriate locking needs to be held |
279 | * since we expect isize to not change at all through the duration of |
280 | * this call. |
281 | */ |
282 | if (len >= isize) { |
283 | whole_file = true; |
284 | len = isize; |
285 | } |
286 | |
287 | start_blk = logical_to_blk(inode, start); |
288 | last_blk = logical_to_blk(inode, start + len - 1); |
289 | |
290 | do { |
291 | /* |
292 | * we set b_size to the total size we want so it will map as |
293 | * many contiguous blocks as possible at once |
294 | */ |
295 | memset(&map_bh, 0, sizeof(struct buffer_head)); |
296 | map_bh.b_size = len; |
297 | |
298 | ret = get_block(inode, start_blk, &map_bh, 0); |
299 | if (ret) |
300 | break; |
301 | |
302 | /* HOLE */ |
303 | if (!buffer_mapped(&map_bh)) { |
304 | start_blk++; |
305 | |
306 | /* |
307 | * We want to handle the case where there is an |
308 | * allocated block at the front of the file, and then |
309 | * nothing but holes up to the end of the file properly, |
310 | * to make sure that extent at the front gets properly |
311 | * marked with FIEMAP_EXTENT_LAST |
312 | */ |
313 | if (!past_eof && |
314 | blk_to_logical(inode, start_blk) >= isize) |
315 | past_eof = 1; |
316 | |
317 | /* |
318 | * First hole after going past the EOF, this is our |
319 | * last extent |
320 | */ |
321 | if (past_eof && size) { |
322 | flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST; |
323 | ret = fiemap_fill_next_extent(fieinfo, logical, |
324 | phys, size, |
325 | flags); |
326 | } else if (size) { |
327 | ret = fiemap_fill_next_extent(fieinfo, logical, |
328 | phys, size, flags); |
329 | size = 0; |
330 | } |
331 | |
332 | /* if we have holes up to/past EOF then we're done */ |
333 | if (start_blk > last_blk || past_eof || ret) |
334 | break; |
335 | } else { |
336 | /* |
337 | * We have gone over the length of what we wanted to |
338 | * map, and it wasn't the entire file, so add the extent |
339 | * we got last time and exit. |
340 | * |
341 | * This is for the case where say we want to map all the |
342 | * way up to the second to the last block in a file, but |
343 | * the last block is a hole, making the second to last |
344 | * block FIEMAP_EXTENT_LAST. In this case we want to |
345 | * see if there is a hole after the second to last block |
346 | * so we can mark it properly. If we found data after |
347 | * we exceeded the length we were requesting, then we |
348 | * are good to go, just add the extent to the fieinfo |
349 | * and break |
350 | */ |
351 | if (start_blk > last_blk && !whole_file) { |
352 | ret = fiemap_fill_next_extent(fieinfo, logical, |
353 | phys, size, |
354 | flags); |
355 | break; |
356 | } |
357 | |
358 | /* |
359 | * if size != 0 then we know we already have an extent |
360 | * to add, so add it. |
361 | */ |
362 | if (size) { |
363 | ret = fiemap_fill_next_extent(fieinfo, logical, |
364 | phys, size, |
365 | flags); |
366 | if (ret) |
367 | break; |
368 | } |
369 | |
370 | logical = blk_to_logical(inode, start_blk); |
371 | phys = blk_to_logical(inode, map_bh.b_blocknr); |
372 | size = map_bh.b_size; |
373 | flags = FIEMAP_EXTENT_MERGED; |
374 | |
375 | start_blk += logical_to_blk(inode, size); |
376 | |
377 | /* |
378 | * If we are past the EOF, then we need to make sure as |
379 | * soon as we find a hole that the last extent we found |
380 | * is marked with FIEMAP_EXTENT_LAST |
381 | */ |
382 | if (!past_eof && logical + size >= isize) |
383 | past_eof = true; |
384 | } |
385 | cond_resched(); |
386 | } while (1); |
387 | |
388 | /* If ret is 1 then we just hit the end of the extent array */ |
389 | if (ret == 1) |
390 | ret = 0; |
391 | |
392 | return ret; |
393 | } |
394 | EXPORT_SYMBOL(__generic_block_fiemap); |
395 | |
396 | /** |
397 | * generic_block_fiemap - FIEMAP for block based inodes |
398 | * @inode: The inode to map |
399 | * @fieinfo: The mapping information |
400 | * @start: The initial block to map |
401 | * @len: The length of the extect to attempt to map |
402 | * @get_block: The block mapping function for the fs |
403 | * |
404 | * Calls __generic_block_fiemap to map the inode, after taking |
405 | * the inode's mutex lock. |
406 | */ |
407 | |
408 | int generic_block_fiemap(struct inode *inode, |
409 | struct fiemap_extent_info *fieinfo, u64 start, |
410 | u64 len, get_block_t *get_block) |
411 | { |
412 | int ret; |
413 | mutex_lock(&inode->i_mutex); |
414 | ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block); |
415 | mutex_unlock(&inode->i_mutex); |
416 | return ret; |
417 | } |
418 | EXPORT_SYMBOL(generic_block_fiemap); |
419 | |
420 | #endif /* CONFIG_BLOCK */ |
421 | |
422 | /* |
423 | * This provides compatibility with legacy XFS pre-allocation ioctls |
424 | * which predate the fallocate syscall. |
425 | * |
426 | * Only the l_start, l_len and l_whence fields of the 'struct space_resv' |
427 | * are used here, rest are ignored. |
428 | */ |
429 | int ioctl_preallocate(struct file *filp, void __user *argp) |
430 | { |
431 | struct inode *inode = filp->f_path.dentry->d_inode; |
432 | struct space_resv sr; |
433 | |
434 | if (copy_from_user(&sr, argp, sizeof(sr))) |
435 | return -EFAULT; |
436 | |
437 | switch (sr.l_whence) { |
438 | case SEEK_SET: |
439 | break; |
440 | case SEEK_CUR: |
441 | sr.l_start += filp->f_pos; |
442 | break; |
443 | case SEEK_END: |
444 | sr.l_start += i_size_read(inode); |
445 | break; |
446 | default: |
447 | return -EINVAL; |
448 | } |
449 | |
450 | return do_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len); |
451 | } |
452 | |
453 | static int file_ioctl(struct file *filp, unsigned int cmd, |
454 | unsigned long arg) |
455 | { |
456 | struct inode *inode = filp->f_path.dentry->d_inode; |
457 | int __user *p = (int __user *)arg; |
458 | |
459 | switch (cmd) { |
460 | case FIBMAP: |
461 | return ioctl_fibmap(filp, p); |
462 | case FIONREAD: |
463 | return put_user(i_size_read(inode) - filp->f_pos, p); |
464 | case FS_IOC_RESVSP: |
465 | case FS_IOC_RESVSP64: |
466 | return ioctl_preallocate(filp, p); |
467 | } |
468 | |
469 | return vfs_ioctl(filp, cmd, arg); |
470 | } |
471 | |
472 | static int ioctl_fionbio(struct file *filp, int __user *argp) |
473 | { |
474 | unsigned int flag; |
475 | int on, error; |
476 | |
477 | error = get_user(on, argp); |
478 | if (error) |
479 | return error; |
480 | flag = O_NONBLOCK; |
481 | #ifdef __sparc__ |
482 | /* SunOS compatibility item. */ |
483 | if (O_NONBLOCK != O_NDELAY) |
484 | flag |= O_NDELAY; |
485 | #endif |
486 | spin_lock(&filp->f_lock); |
487 | if (on) |
488 | filp->f_flags |= flag; |
489 | else |
490 | filp->f_flags &= ~flag; |
491 | spin_unlock(&filp->f_lock); |
492 | return error; |
493 | } |
494 | |
495 | static int ioctl_fioasync(unsigned int fd, struct file *filp, |
496 | int __user *argp) |
497 | { |
498 | unsigned int flag; |
499 | int on, error; |
500 | |
501 | error = get_user(on, argp); |
502 | if (error) |
503 | return error; |
504 | flag = on ? FASYNC : 0; |
505 | |
506 | /* Did FASYNC state change ? */ |
507 | if ((flag ^ filp->f_flags) & FASYNC) { |
508 | if (filp->f_op && filp->f_op->fasync) |
509 | /* fasync() adjusts filp->f_flags */ |
510 | error = filp->f_op->fasync(fd, filp, on); |
511 | else |
512 | error = -ENOTTY; |
513 | } |
514 | return error < 0 ? error : 0; |
515 | } |
516 | |
517 | static int ioctl_fsfreeze(struct file *filp) |
518 | { |
519 | struct super_block *sb = filp->f_path.dentry->d_inode->i_sb; |
520 | |
521 | if (!capable(CAP_SYS_ADMIN)) |
522 | return -EPERM; |
523 | |
524 | /* If filesystem doesn't support freeze feature, return. */ |
525 | if (sb->s_op->freeze_fs == NULL) |
526 | return -EOPNOTSUPP; |
527 | |
528 | /* If a blockdevice-backed filesystem isn't specified, return. */ |
529 | if (sb->s_bdev == NULL) |
530 | return -EINVAL; |
531 | |
532 | /* Freeze */ |
533 | sb = freeze_bdev(sb->s_bdev); |
534 | if (IS_ERR(sb)) |
535 | return PTR_ERR(sb); |
536 | return 0; |
537 | } |
538 | |
539 | static int ioctl_fsthaw(struct file *filp) |
540 | { |
541 | struct super_block *sb = filp->f_path.dentry->d_inode->i_sb; |
542 | |
543 | if (!capable(CAP_SYS_ADMIN)) |
544 | return -EPERM; |
545 | |
546 | /* If a blockdevice-backed filesystem isn't specified, return EINVAL. */ |
547 | if (sb->s_bdev == NULL) |
548 | return -EINVAL; |
549 | |
550 | /* Thaw */ |
551 | return thaw_bdev(sb->s_bdev, sb); |
552 | } |
553 | |
554 | /* |
555 | * When you add any new common ioctls to the switches above and below |
556 | * please update compat_sys_ioctl() too. |
557 | * |
558 | * do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d. |
559 | * It's just a simple helper for sys_ioctl and compat_sys_ioctl. |
560 | */ |
561 | int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, |
562 | unsigned long arg) |
563 | { |
564 | int error = 0; |
565 | int __user *argp = (int __user *)arg; |
566 | |
567 | switch (cmd) { |
568 | case FIOCLEX: |
569 | set_close_on_exec(fd, 1); |
570 | break; |
571 | |
572 | case FIONCLEX: |
573 | set_close_on_exec(fd, 0); |
574 | break; |
575 | |
576 | case FIONBIO: |
577 | error = ioctl_fionbio(filp, argp); |
578 | break; |
579 | |
580 | case FIOASYNC: |
581 | error = ioctl_fioasync(fd, filp, argp); |
582 | break; |
583 | |
584 | case FIOQSIZE: |
585 | if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) || |
586 | S_ISREG(filp->f_path.dentry->d_inode->i_mode) || |
587 | S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) { |
588 | loff_t res = |
589 | inode_get_bytes(filp->f_path.dentry->d_inode); |
590 | error = copy_to_user((loff_t __user *)arg, &res, |
591 | sizeof(res)) ? -EFAULT : 0; |
592 | } else |
593 | error = -ENOTTY; |
594 | break; |
595 | |
596 | case FIFREEZE: |
597 | error = ioctl_fsfreeze(filp); |
598 | break; |
599 | |
600 | case FITHAW: |
601 | error = ioctl_fsthaw(filp); |
602 | break; |
603 | |
604 | case FS_IOC_FIEMAP: |
605 | return ioctl_fiemap(filp, arg); |
606 | |
607 | case FIGETBSZ: |
608 | { |
609 | struct inode *inode = filp->f_path.dentry->d_inode; |
610 | int __user *p = (int __user *)arg; |
611 | return put_user(inode->i_sb->s_blocksize, p); |
612 | } |
613 | |
614 | default: |
615 | if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) |
616 | error = file_ioctl(filp, cmd, arg); |
617 | else |
618 | error = vfs_ioctl(filp, cmd, arg); |
619 | break; |
620 | } |
621 | return error; |
622 | } |
623 | |
624 | SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg) |
625 | { |
626 | struct file *filp; |
627 | int error = -EBADF; |
628 | int fput_needed; |
629 | |
630 | filp = fget_light(fd, &fput_needed); |
631 | if (!filp) |
632 | goto out; |
633 | |
634 | error = security_file_ioctl(filp, cmd, arg); |
635 | if (error) |
636 | goto out_fput; |
637 | |
638 | error = do_vfs_ioctl(filp, fd, cmd, arg); |
639 | out_fput: |
640 | fput_light(filp, fput_needed); |
641 | out: |
642 | return error; |
643 | } |
644 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
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jz-2.6.35
jz-2.6.36
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jz-3.11
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jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9