Blame view
fs/ioctl.c
19 KB
b24413180 License cleanup: ... |
1 |
// SPDX-License-Identifier: GPL-2.0 |
1da177e4c Linux-2.6.12-rc2 |
2 3 4 5 6 |
/* * linux/fs/ioctl.c * * Copyright (C) 1991, 1992 Linus Torvalds */ |
1da177e4c Linux-2.6.12-rc2 |
7 8 |
#include <linux/syscalls.h> #include <linux/mm.h> |
16f7e0fe2 [PATCH] capable/c... |
9 |
#include <linux/capability.h> |
8896dd968 compat_ioctl: add... |
10 |
#include <linux/compat.h> |
1da177e4c Linux-2.6.12-rc2 |
11 12 13 |
#include <linux/file.h> #include <linux/fs.h> #include <linux/security.h> |
630d9c472 fs: reduce the us... |
14 |
#include <linux/export.h> |
c9845ff1d VFS: apply coding... |
15 |
#include <linux/uaccess.h> |
68c9d702b generic block bas... |
16 17 |
#include <linux/writeback.h> #include <linux/buffer_head.h> |
3e63cbb1e fs: Add new pre-a... |
18 |
#include <linux/falloc.h> |
f361bf4a6 sched/headers: Pr... |
19 |
#include <linux/sched/signal.h> |
66cf191f3 compat_ioctl: don... |
20 |
#include "internal.h" |
1da177e4c Linux-2.6.12-rc2 |
21 |
|
1da177e4c Linux-2.6.12-rc2 |
22 |
#include <asm/ioctls.h> |
c4b929b85 vfs: vfs-level fi... |
23 24 |
/* So that the fiemap access checks can't overflow on 32 bit machines. */ #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) |
deb21db77 VFS: swap do_ioct... |
25 26 |
/** * vfs_ioctl - call filesystem specific ioctl methods |
f6a4c8bdb fix up kerneldoc ... |
27 28 29 |
* @filp: open file to invoke ioctl method on * @cmd: ioctl command to execute * @arg: command-specific argument for ioctl |
deb21db77 VFS: swap do_ioct... |
30 31 |
* * Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise |
deb21db77 VFS: swap do_ioct... |
32 33 34 35 |
* returns -ENOTTY. * * Returns 0 on success, -errno on error. */ |
66cf191f3 compat_ioctl: don... |
36 |
long vfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1da177e4c Linux-2.6.12-rc2 |
37 38 |
{ int error = -ENOTTY; |
72c2d5319 file->f_op is nev... |
39 |
if (!filp->f_op->unlocked_ioctl) |
1da177e4c Linux-2.6.12-rc2 |
40 |
goto out; |
b19dd42fa bkl: Remove locke... |
41 42 |
error = filp->f_op->unlocked_ioctl(filp, cmd, arg); if (error == -ENOIOCTLCMD) |
07d106d0a vfs: fix up ENOIO... |
43 |
error = -ENOTTY; |
1da177e4c Linux-2.6.12-rc2 |
44 45 46 |
out: return error; } |
9df6702ad vfs: export vfs_i... |
47 |
EXPORT_SYMBOL(vfs_ioctl); |
1da177e4c Linux-2.6.12-rc2 |
48 |
|
aa81a7c71 VFS: factor out t... |
49 50 51 52 53 54 55 56 57 58 59 60 61 |
static int ioctl_fibmap(struct file *filp, int __user *p) { struct address_space *mapping = filp->f_mapping; int res, block; /* do we support this mess? */ if (!mapping->a_ops->bmap) return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; res = get_user(block, p); if (res) return res; |
aa81a7c71 VFS: factor out t... |
62 |
res = mapping->a_ops->bmap(mapping, block); |
aa81a7c71 VFS: factor out t... |
63 64 |
return put_user(res, p); } |
c4b929b85 vfs: vfs-level fi... |
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 |
/** * fiemap_fill_next_extent - Fiemap helper function * @fieinfo: Fiemap context passed into ->fiemap * @logical: Extent logical start offset, in bytes * @phys: Extent physical start offset, in bytes * @len: Extent length, in bytes * @flags: FIEMAP_EXTENT flags that describe this extent * * Called from file system ->fiemap callback. Will populate extent * info as passed in via arguments and copy to user memory. On * success, extent count on fieinfo is incremented. * * Returns 0 on success, -errno on error, 1 if this was the last * extent that will fit in user array. */ #define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC) #define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED) #define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE) int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical, u64 phys, u64 len, u32 flags) { struct fiemap_extent extent; |
ecf5632dd fs: fix address s... |
87 |
struct fiemap_extent __user *dest = fieinfo->fi_extents_start; |
c4b929b85 vfs: vfs-level fi... |
88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 |
/* only count the extents */ if (fieinfo->fi_extents_max == 0) { fieinfo->fi_extents_mapped++; return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0; } if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max) return 1; if (flags & SET_UNKNOWN_FLAGS) flags |= FIEMAP_EXTENT_UNKNOWN; if (flags & SET_NO_UNMOUNTED_IO_FLAGS) flags |= FIEMAP_EXTENT_ENCODED; if (flags & SET_NOT_ALIGNED_FLAGS) flags |= FIEMAP_EXTENT_NOT_ALIGNED; memset(&extent, 0, sizeof(extent)); extent.fe_logical = logical; extent.fe_physical = phys; extent.fe_length = len; extent.fe_flags = flags; dest += fieinfo->fi_extents_mapped; if (copy_to_user(dest, &extent, sizeof(extent))) return -EFAULT; fieinfo->fi_extents_mapped++; if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max) return 1; return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0; } EXPORT_SYMBOL(fiemap_fill_next_extent); /** * fiemap_check_flags - check validity of requested flags for fiemap * @fieinfo: Fiemap context passed into ->fiemap * @fs_flags: Set of fiemap flags that the file system understands * * Called from file system ->fiemap callback. This will compute the * intersection of valid fiemap flags and those that the fs supports. That * value is then compared against the user supplied flags. In case of bad user * flags, the invalid values will be written into the fieinfo structure, and * -EBADR is returned, which tells ioctl_fiemap() to return those values to * userspace. For this reason, a return code of -EBADR should be preserved. * * Returns 0 on success, -EBADR on bad flags. */ int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags) { u32 incompat_flags; incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags); if (incompat_flags) { fieinfo->fi_flags = incompat_flags; return -EBADR; } return 0; } EXPORT_SYMBOL(fiemap_check_flags); static int fiemap_check_ranges(struct super_block *sb, u64 start, u64 len, u64 *new_len) { |
5aa98b706 vfs: explicitly c... |
152 |
u64 maxbytes = (u64) sb->s_maxbytes; |
c4b929b85 vfs: vfs-level fi... |
153 154 155 156 |
*new_len = len; if (len == 0) return -EINVAL; |
5aa98b706 vfs: explicitly c... |
157 |
if (start > maxbytes) |
c4b929b85 vfs: vfs-level fi... |
158 159 160 161 162 |
return -EFBIG; /* * Shrink request scope to what the fs can actually handle. */ |
5aa98b706 vfs: explicitly c... |
163 164 |
if (len > maxbytes || (maxbytes - len) < start) *new_len = maxbytes - start; |
c4b929b85 vfs: vfs-level fi... |
165 166 167 168 169 170 171 |
return 0; } static int ioctl_fiemap(struct file *filp, unsigned long arg) { struct fiemap fiemap; |
ecf5632dd fs: fix address s... |
172 |
struct fiemap __user *ufiemap = (struct fiemap __user *) arg; |
c4b929b85 vfs: vfs-level fi... |
173 |
struct fiemap_extent_info fieinfo = { 0, }; |
496ad9aa8 new helper: file_... |
174 |
struct inode *inode = file_inode(filp); |
c4b929b85 vfs: vfs-level fi... |
175 176 177 178 179 180 |
struct super_block *sb = inode->i_sb; u64 len; int error; if (!inode->i_op->fiemap) return -EOPNOTSUPP; |
ecf5632dd fs: fix address s... |
181 |
if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) |
c4b929b85 vfs: vfs-level fi... |
182 183 184 185 186 187 188 189 190 191 192 193 |
return -EFAULT; if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) return -EINVAL; error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length, &len); if (error) return error; fieinfo.fi_flags = fiemap.fm_flags; fieinfo.fi_extents_max = fiemap.fm_extent_count; |
ecf5632dd fs: fix address s... |
194 |
fieinfo.fi_extents_start = ufiemap->fm_extents; |
c4b929b85 vfs: vfs-level fi... |
195 196 |
if (fiemap.fm_extent_count != 0 && |
96d4f267e Remove 'type' arg... |
197 |
!access_ok(fieinfo.fi_extents_start, |
c4b929b85 vfs: vfs-level fi... |
198 199 200 201 202 203 204 205 206 |
fieinfo.fi_extents_max * sizeof(struct fiemap_extent))) return -EFAULT; if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC) filemap_write_and_wait(inode->i_mapping); error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len); fiemap.fm_flags = fieinfo.fi_flags; fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; |
ecf5632dd fs: fix address s... |
207 |
if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) |
c4b929b85 vfs: vfs-level fi... |
208 209 210 211 |
error = -EFAULT; return error; } |
04b38d601 vfs: pull btrfs c... |
212 213 214 215 |
static long ioctl_file_clone(struct file *dst_file, unsigned long srcfd, u64 off, u64 olen, u64 destoff) { struct fd src_file = fdget(srcfd); |
42ec3d4c0 vfs: make remap_f... |
216 |
loff_t cloned; |
04b38d601 vfs: pull btrfs c... |
217 218 219 220 |
int ret; if (!src_file.file) return -EBADF; |
913b86e92 vfs: allow vfs_cl... |
221 222 223 |
ret = -EXDEV; if (src_file.file->f_path.mnt != dst_file->f_path.mnt) goto fdput; |
42ec3d4c0 vfs: make remap_f... |
224 |
cloned = vfs_clone_file_range(src_file.file, off, dst_file, destoff, |
452ce6595 vfs: plumb remap ... |
225 |
olen, 0); |
42ec3d4c0 vfs: make remap_f... |
226 227 228 229 230 231 |
if (cloned < 0) ret = cloned; else if (olen && cloned != olen) ret = -EINVAL; else ret = 0; |
913b86e92 vfs: allow vfs_cl... |
232 |
fdput: |
04b38d601 vfs: pull btrfs c... |
233 234 235 236 237 238 239 240 241 242 243 244 245 |
fdput(src_file); return ret; } static long ioctl_file_clone_range(struct file *file, void __user *argp) { struct file_clone_range args; if (copy_from_user(&args, argp, sizeof(args))) return -EFAULT; return ioctl_file_clone(file, args.src_fd, args.src_offset, args.src_length, args.dest_offset); } |
06270d5d6 provide generic_b... |
246 |
#ifdef CONFIG_BLOCK |
3a3076f4d Cleanup generic b... |
247 248 249 250 251 252 253 254 255 |
static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) { return (offset >> inode->i_blkbits); } static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) { return (blk << inode->i_blkbits); } |
68c9d702b generic block bas... |
256 |
|
e9079cce2 GFS2: Support for... |
257 258 |
/** * __generic_block_fiemap - FIEMAP for block based inodes (no locking) |
3a3076f4d Cleanup generic b... |
259 260 261 262 263 |
* @inode: the inode to map * @fieinfo: the fiemap info struct that will be passed back to userspace * @start: where to start mapping in the inode * @len: how much space to map * @get_block: the fs's get_block function |
68c9d702b generic block bas... |
264 265 266 267 268 269 270 |
* * This does FIEMAP for block based inodes. Basically it will just loop * through get_block until we hit the number of extents we want to map, or we * go past the end of the file and hit a hole. * * If it is possible to have data blocks beyond a hole past @inode->i_size, then * please do not use this function, it will stop at the first unmapped block |
e9079cce2 GFS2: Support for... |
271 272 273 274 |
* beyond i_size. * * If you use this function directly, you need to do your own locking. Use * generic_block_fiemap if you want the locking done for you. |
68c9d702b generic block bas... |
275 |
*/ |
e9079cce2 GFS2: Support for... |
276 277 |
int __generic_block_fiemap(struct inode *inode, |
3a3076f4d Cleanup generic b... |
278 279 |
struct fiemap_extent_info *fieinfo, loff_t start, loff_t len, get_block_t *get_block) |
68c9d702b generic block bas... |
280 |
{ |
3a3076f4d Cleanup generic b... |
281 282 283 |
struct buffer_head map_bh; sector_t start_blk, last_blk; loff_t isize = i_size_read(inode); |
68c9d702b generic block bas... |
284 285 |
u64 logical = 0, phys = 0, size = 0; u32 flags = FIEMAP_EXTENT_MERGED; |
3a3076f4d Cleanup generic b... |
286 287 |
bool past_eof = false, whole_file = false; int ret = 0; |
68c9d702b generic block bas... |
288 |
|
3a3076f4d Cleanup generic b... |
289 290 |
ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); if (ret) |
68c9d702b generic block bas... |
291 |
return ret; |
3a3076f4d Cleanup generic b... |
292 293 294 295 296 297 298 299 300 |
/* * Either the i_mutex or other appropriate locking needs to be held * since we expect isize to not change at all through the duration of * this call. */ if (len >= isize) { whole_file = true; len = isize; } |
df3935ffd fiemap: fix probl... |
301 |
|
d54cdc8ca fs: make block fi... |
302 303 304 305 306 307 |
/* * Some filesystems can't deal with being asked to map less than * blocksize, so make sure our len is at least block length. */ if (logical_to_blk(inode, len) == 0) len = blk_to_logical(inode, 1); |
3a3076f4d Cleanup generic b... |
308 309 |
start_blk = logical_to_blk(inode, start); last_blk = logical_to_blk(inode, start + len - 1); |
68c9d702b generic block bas... |
310 311 312 313 314 315 |
do { /* * we set b_size to the total size we want so it will map as * many contiguous blocks as possible at once */ |
3a3076f4d Cleanup generic b... |
316 317 |
memset(&map_bh, 0, sizeof(struct buffer_head)); map_bh.b_size = len; |
68c9d702b generic block bas... |
318 |
|
3a3076f4d Cleanup generic b... |
319 |
ret = get_block(inode, start_blk, &map_bh, 0); |
68c9d702b generic block bas... |
320 321 322 323 |
if (ret) break; /* HOLE */ |
3a3076f4d Cleanup generic b... |
324 |
if (!buffer_mapped(&map_bh)) { |
df3935ffd fiemap: fix probl... |
325 326 327 |
start_blk++; /* |
3a3076f4d Cleanup generic b... |
328 |
* We want to handle the case where there is an |
df3935ffd fiemap: fix probl... |
329 330 331 332 333 334 |
* allocated block at the front of the file, and then * nothing but holes up to the end of the file properly, * to make sure that extent at the front gets properly * marked with FIEMAP_EXTENT_LAST */ if (!past_eof && |
3a3076f4d Cleanup generic b... |
335 |
blk_to_logical(inode, start_blk) >= isize) |
df3935ffd fiemap: fix probl... |
336 |
past_eof = 1; |
68c9d702b generic block bas... |
337 |
/* |
3a3076f4d Cleanup generic b... |
338 |
* First hole after going past the EOF, this is our |
68c9d702b generic block bas... |
339 340 |
* last extent */ |
df3935ffd fiemap: fix probl... |
341 |
if (past_eof && size) { |
68c9d702b generic block bas... |
342 343 344 345 |
flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST; ret = fiemap_fill_next_extent(fieinfo, logical, phys, size, flags); |
3a3076f4d Cleanup generic b... |
346 347 348 349 |
} else if (size) { ret = fiemap_fill_next_extent(fieinfo, logical, phys, size, flags); size = 0; |
68c9d702b generic block bas... |
350 |
} |
68c9d702b generic block bas... |
351 |
/* if we have holes up to/past EOF then we're done */ |
3a3076f4d Cleanup generic b... |
352 |
if (start_blk > last_blk || past_eof || ret) |
68c9d702b generic block bas... |
353 |
break; |
68c9d702b generic block bas... |
354 |
} else { |
df3935ffd fiemap: fix probl... |
355 |
/* |
3a3076f4d Cleanup generic b... |
356 |
* We have gone over the length of what we wanted to |
df3935ffd fiemap: fix probl... |
357 358 359 360 361 362 363 364 365 366 367 368 369 |
* map, and it wasn't the entire file, so add the extent * we got last time and exit. * * This is for the case where say we want to map all the * way up to the second to the last block in a file, but * the last block is a hole, making the second to last * block FIEMAP_EXTENT_LAST. In this case we want to * see if there is a hole after the second to last block * so we can mark it properly. If we found data after * we exceeded the length we were requesting, then we * are good to go, just add the extent to the fieinfo * and break */ |
3a3076f4d Cleanup generic b... |
370 |
if (start_blk > last_blk && !whole_file) { |
df3935ffd fiemap: fix probl... |
371 372 373 374 375 376 377 378 379 380 381 |
ret = fiemap_fill_next_extent(fieinfo, logical, phys, size, flags); break; } /* * if size != 0 then we know we already have an extent * to add, so add it. */ if (size) { |
68c9d702b generic block bas... |
382 383 384 385 386 387 388 389 |
ret = fiemap_fill_next_extent(fieinfo, logical, phys, size, flags); if (ret) break; } logical = blk_to_logical(inode, start_blk); |
3a3076f4d Cleanup generic b... |
390 391 |
phys = blk_to_logical(inode, map_bh.b_blocknr); size = map_bh.b_size; |
68c9d702b generic block bas... |
392 |
flags = FIEMAP_EXTENT_MERGED; |
68c9d702b generic block bas... |
393 394 395 |
start_blk += logical_to_blk(inode, size); /* |
df3935ffd fiemap: fix probl... |
396 397 398 |
* If we are past the EOF, then we need to make sure as * soon as we find a hole that the last extent we found * is marked with FIEMAP_EXTENT_LAST |
68c9d702b generic block bas... |
399 |
*/ |
3a3076f4d Cleanup generic b... |
400 401 |
if (!past_eof && logical + size >= isize) past_eof = true; |
68c9d702b generic block bas... |
402 403 |
} cond_resched(); |
913e027ca fsioctl.c: make g... |
404 405 406 407 |
if (fatal_signal_pending(current)) { ret = -EINTR; break; } |
68c9d702b generic block bas... |
408 |
} while (1); |
3a3076f4d Cleanup generic b... |
409 |
/* If ret is 1 then we just hit the end of the extent array */ |
68c9d702b generic block bas... |
410 411 412 413 414 |
if (ret == 1) ret = 0; return ret; } |
e9079cce2 GFS2: Support for... |
415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 |
EXPORT_SYMBOL(__generic_block_fiemap); /** * generic_block_fiemap - FIEMAP for block based inodes * @inode: The inode to map * @fieinfo: The mapping information * @start: The initial block to map * @len: The length of the extect to attempt to map * @get_block: The block mapping function for the fs * * Calls __generic_block_fiemap to map the inode, after taking * the inode's mutex lock. */ int generic_block_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len, get_block_t *get_block) { int ret; |
5955102c9 wrappers for ->i_... |
434 |
inode_lock(inode); |
e9079cce2 GFS2: Support for... |
435 |
ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block); |
5955102c9 wrappers for ->i_... |
436 |
inode_unlock(inode); |
e9079cce2 GFS2: Support for... |
437 438 |
return ret; } |
68c9d702b generic block bas... |
439 |
EXPORT_SYMBOL(generic_block_fiemap); |
06270d5d6 provide generic_b... |
440 |
#endif /* CONFIG_BLOCK */ |
3e63cbb1e fs: Add new pre-a... |
441 442 443 444 445 446 447 448 449 |
/* * This provides compatibility with legacy XFS pre-allocation ioctls * which predate the fallocate syscall. * * Only the l_start, l_len and l_whence fields of the 'struct space_resv' * are used here, rest are ignored. */ int ioctl_preallocate(struct file *filp, void __user *argp) { |
496ad9aa8 new helper: file_... |
450 |
struct inode *inode = file_inode(filp); |
3e63cbb1e fs: Add new pre-a... |
451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 |
struct space_resv sr; if (copy_from_user(&sr, argp, sizeof(sr))) return -EFAULT; switch (sr.l_whence) { case SEEK_SET: break; case SEEK_CUR: sr.l_start += filp->f_pos; break; case SEEK_END: sr.l_start += i_size_read(inode); break; default: return -EINVAL; } |
72c72bdf7 VFS: Rename do_fa... |
468 |
return vfs_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len); |
3e63cbb1e fs: Add new pre-a... |
469 |
} |
1da177e4c Linux-2.6.12-rc2 |
470 471 472 |
static int file_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { |
496ad9aa8 new helper: file_... |
473 |
struct inode *inode = file_inode(filp); |
1da177e4c Linux-2.6.12-rc2 |
474 475 476 |
int __user *p = (int __user *)arg; switch (cmd) { |
c9845ff1d VFS: apply coding... |
477 |
case FIBMAP: |
aa81a7c71 VFS: factor out t... |
478 |
return ioctl_fibmap(filp, p); |
c9845ff1d VFS: apply coding... |
479 480 |
case FIONREAD: return put_user(i_size_read(inode) - filp->f_pos, p); |
3e63cbb1e fs: Add new pre-a... |
481 482 483 |
case FS_IOC_RESVSP: case FS_IOC_RESVSP64: return ioctl_preallocate(filp, p); |
1da177e4c Linux-2.6.12-rc2 |
484 |
} |
deb21db77 VFS: swap do_ioct... |
485 |
return vfs_ioctl(filp, cmd, arg); |
1da177e4c Linux-2.6.12-rc2 |
486 |
} |
aa81a7c71 VFS: factor out t... |
487 488 489 490 491 492 493 494 495 496 497 498 499 500 |
static int ioctl_fionbio(struct file *filp, int __user *argp) { unsigned int flag; int on, error; error = get_user(on, argp); if (error) return error; flag = O_NONBLOCK; #ifdef __sparc__ /* SunOS compatibility item. */ if (O_NONBLOCK != O_NDELAY) flag |= O_NDELAY; #endif |
db1dd4d37 Use f_lock to pro... |
501 |
spin_lock(&filp->f_lock); |
aa81a7c71 VFS: factor out t... |
502 503 504 505 |
if (on) filp->f_flags |= flag; else filp->f_flags &= ~flag; |
db1dd4d37 Use f_lock to pro... |
506 |
spin_unlock(&filp->f_lock); |
aa81a7c71 VFS: factor out t... |
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 |
return error; } static int ioctl_fioasync(unsigned int fd, struct file *filp, int __user *argp) { unsigned int flag; int on, error; error = get_user(on, argp); if (error) return error; flag = on ? FASYNC : 0; /* Did FASYNC state change ? */ if ((flag ^ filp->f_flags) & FASYNC) { |
72c2d5319 file->f_op is nev... |
523 |
if (filp->f_op->fasync) |
76398425b Move FASYNC bit h... |
524 |
/* fasync() adjusts filp->f_flags */ |
aa81a7c71 VFS: factor out t... |
525 |
error = filp->f_op->fasync(fd, filp, on); |
218d11a8b Fix a race condit... |
526 |
else |
aa81a7c71 VFS: factor out t... |
527 528 |
error = -ENOTTY; } |
60aa49243 Rationalize fasyn... |
529 |
return error < 0 ? error : 0; |
aa81a7c71 VFS: factor out t... |
530 |
} |
fcccf5025 filesystem freeze... |
531 532 |
static int ioctl_fsfreeze(struct file *filp) { |
496ad9aa8 new helper: file_... |
533 |
struct super_block *sb = file_inode(filp)->i_sb; |
fcccf5025 filesystem freeze... |
534 |
|
f3f1a1833 fs: Allow CAP_SYS... |
535 |
if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) |
fcccf5025 filesystem freeze... |
536 537 538 |
return -EPERM; /* If filesystem doesn't support freeze feature, return. */ |
48b6bca6b fs: add freeze_su... |
539 |
if (sb->s_op->freeze_fs == NULL && sb->s_op->freeze_super == NULL) |
fcccf5025 filesystem freeze... |
540 |
return -EOPNOTSUPP; |
fcccf5025 filesystem freeze... |
541 |
/* Freeze */ |
48b6bca6b fs: add freeze_su... |
542 543 |
if (sb->s_op->freeze_super) return sb->s_op->freeze_super(sb); |
18e9e5104 Introduce freeze_... |
544 |
return freeze_super(sb); |
fcccf5025 filesystem freeze... |
545 546 547 548 |
} static int ioctl_fsthaw(struct file *filp) { |
496ad9aa8 new helper: file_... |
549 |
struct super_block *sb = file_inode(filp)->i_sb; |
fcccf5025 filesystem freeze... |
550 |
|
f3f1a1833 fs: Allow CAP_SYS... |
551 |
if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) |
fcccf5025 filesystem freeze... |
552 |
return -EPERM; |
fcccf5025 filesystem freeze... |
553 |
/* Thaw */ |
48b6bca6b fs: add freeze_su... |
554 555 |
if (sb->s_op->thaw_super) return sb->s_op->thaw_super(sb); |
18e9e5104 Introduce freeze_... |
556 |
return thaw_super(sb); |
fcccf5025 filesystem freeze... |
557 |
} |
5297e0f0f vfs: fix return t... |
558 |
static int ioctl_file_dedupe_range(struct file *file, void __user *arg) |
54dbc1517 vfs: hoist the bt... |
559 560 561 562 563 564 565 566 567 568 569 570 571 |
{ struct file_dedupe_range __user *argp = arg; struct file_dedupe_range *same = NULL; int ret; unsigned long size; u16 count; if (get_user(count, &argp->dest_count)) { ret = -EFAULT; goto out; } size = offsetof(struct file_dedupe_range __user, info[count]); |
b71dbf103 vfs: cap dedupe r... |
572 573 574 575 |
if (size > PAGE_SIZE) { ret = -ENOMEM; goto out; } |
54dbc1517 vfs: hoist the bt... |
576 577 578 579 580 581 582 |
same = memdup_user(argp, size); if (IS_ERR(same)) { ret = PTR_ERR(same); same = NULL; goto out; } |
10eec60ce vfs: ioctl: preve... |
583 |
same->dest_count = count; |
54dbc1517 vfs: hoist the bt... |
584 585 586 587 588 589 590 591 592 593 594 595 |
ret = vfs_dedupe_file_range(file, same); if (ret) goto out; ret = copy_to_user(argp, same, size); if (ret) ret = -EFAULT; out: kfree(same); return ret; } |
1da177e4c Linux-2.6.12-rc2 |
596 597 598 599 |
/* * When you add any new common ioctls to the switches above and below * please update compat_sys_ioctl() too. * |
deb21db77 VFS: swap do_ioct... |
600 |
* do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d. |
1da177e4c Linux-2.6.12-rc2 |
601 602 |
* It's just a simple helper for sys_ioctl and compat_sys_ioctl. */ |
deb21db77 VFS: swap do_ioct... |
603 604 |
int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, unsigned long arg) |
1da177e4c Linux-2.6.12-rc2 |
605 |
{ |
aa81a7c71 VFS: factor out t... |
606 607 |
int error = 0; int __user *argp = (int __user *)arg; |
496ad9aa8 new helper: file_... |
608 |
struct inode *inode = file_inode(filp); |
1da177e4c Linux-2.6.12-rc2 |
609 610 |
switch (cmd) { |
c9845ff1d VFS: apply coding... |
611 612 613 |
case FIOCLEX: set_close_on_exec(fd, 1); break; |
1da177e4c Linux-2.6.12-rc2 |
614 |
|
c9845ff1d VFS: apply coding... |
615 616 617 |
case FIONCLEX: set_close_on_exec(fd, 0); break; |
1da177e4c Linux-2.6.12-rc2 |
618 |
|
c9845ff1d VFS: apply coding... |
619 |
case FIONBIO: |
aa81a7c71 VFS: factor out t... |
620 |
error = ioctl_fionbio(filp, argp); |
c9845ff1d VFS: apply coding... |
621 622 623 |
break; case FIOASYNC: |
aa81a7c71 VFS: factor out t... |
624 |
error = ioctl_fioasync(fd, filp, argp); |
c9845ff1d VFS: apply coding... |
625 626 627 |
break; case FIOQSIZE: |
27a4f7e61 vfs: cleanup do_v... |
628 629 630 631 632 |
if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) { loff_t res = inode_get_bytes(inode); error = copy_to_user(argp, &res, sizeof(res)) ? -EFAULT : 0; |
c9845ff1d VFS: apply coding... |
633 634 635 |
} else error = -ENOTTY; break; |
fcccf5025 filesystem freeze... |
636 637 638 639 640 641 642 643 |
case FIFREEZE: error = ioctl_fsfreeze(filp); break; case FITHAW: error = ioctl_fsthaw(filp); break; |
19ba0559f vfs: Enable FS_IO... |
644 645 646 647 |
case FS_IOC_FIEMAP: return ioctl_fiemap(filp, arg); case FIGETBSZ: |
8f97d1e99 vfs: fix FIGETBSZ... |
648 649 650 |
/* anon_bdev filesystems may not have a block size */ if (!inode->i_sb->s_blocksize) return -EINVAL; |
27a4f7e61 vfs: cleanup do_v... |
651 |
return put_user(inode->i_sb->s_blocksize, argp); |
19ba0559f vfs: Enable FS_IO... |
652 |
|
04b38d601 vfs: pull btrfs c... |
653 654 655 656 657 |
case FICLONE: return ioctl_file_clone(filp, arg, 0, 0, 0); case FICLONERANGE: return ioctl_file_clone_range(filp, argp); |
54dbc1517 vfs: hoist the bt... |
658 659 |
case FIDEDUPERANGE: return ioctl_file_dedupe_range(filp, argp); |
c9845ff1d VFS: apply coding... |
660 |
default: |
27a4f7e61 vfs: cleanup do_v... |
661 |
if (S_ISREG(inode->i_mode)) |
c9845ff1d VFS: apply coding... |
662 663 |
error = file_ioctl(filp, cmd, arg); else |
deb21db77 VFS: swap do_ioct... |
664 |
error = vfs_ioctl(filp, cmd, arg); |
c9845ff1d VFS: apply coding... |
665 |
break; |
1da177e4c Linux-2.6.12-rc2 |
666 667 668 |
} return error; } |
cbb60b924 fs: add ksys_ioct... |
669 |
int ksys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg) |
1da177e4c Linux-2.6.12-rc2 |
670 |
{ |
2903ff019 switch simple cas... |
671 672 673 674 675 676 677 678 679 |
int error; struct fd f = fdget(fd); if (!f.file) return -EBADF; error = security_file_ioctl(f.file, cmd, arg); if (!error) error = do_vfs_ioctl(f.file, fd, cmd, arg); fdput(f); |
1da177e4c Linux-2.6.12-rc2 |
680 681 |
return error; } |
cbb60b924 fs: add ksys_ioct... |
682 683 684 685 686 |
SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg) { return ksys_ioctl(fd, cmd, arg); } |
8896dd968 compat_ioctl: add... |
687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 |
#ifdef CONFIG_COMPAT /** * compat_ptr_ioctl - generic implementation of .compat_ioctl file operation * * This is not normally called as a function, but instead set in struct * file_operations as * * .compat_ioctl = compat_ptr_ioctl, * * On most architectures, the compat_ptr_ioctl() just passes all arguments * to the corresponding ->ioctl handler. The exception is arch/s390, where * compat_ptr() clears the top bit of a 32-bit pointer value, so user space * pointers to the second 2GB alias the first 2GB, as is the case for * native 32-bit s390 user space. * * The compat_ptr_ioctl() function must therefore be used only with ioctl * functions that either ignore the argument or pass a pointer to a * compatible data type. * * If any ioctl command handled by fops->unlocked_ioctl passes a plain * integer instead of a pointer, or any of the passed data types * is incompatible between 32-bit and 64-bit architectures, a proper * handler is required instead of compat_ptr_ioctl. */ long compat_ptr_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { if (!file->f_op->unlocked_ioctl) return -ENOIOCTLCMD; return file->f_op->unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); } EXPORT_SYMBOL(compat_ptr_ioctl); #endif |