]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
617ba13b | 3 | * linux/fs/ext4/ioctl.c |
ac27a0ec DK |
4 | * |
5 | * Copyright (C) 1993, 1994, 1995 | |
6 | * Remy Card (card@masi.ibp.fr) | |
7 | * Laboratoire MASI - Institut Blaise Pascal | |
8 | * Universite Pierre et Marie Curie (Paris VI) | |
9 | */ | |
10 | ||
11 | #include <linux/fs.h> | |
ac27a0ec | 12 | #include <linux/capability.h> |
ac27a0ec DK |
13 | #include <linux/time.h> |
14 | #include <linux/compat.h> | |
42a74f20 | 15 | #include <linux/mount.h> |
748de673 | 16 | #include <linux/file.h> |
9b7365fc | 17 | #include <linux/quotaops.h> |
8da4b8c4 | 18 | #include <linux/uuid.h> |
7c0f6ba6 | 19 | #include <linux/uaccess.h> |
783d9485 | 20 | #include <linux/delay.h> |
3dcf5451 CH |
21 | #include "ext4_jbd2.h" |
22 | #include "ext4.h" | |
0c9ec4be DW |
23 | #include <linux/fsmap.h> |
24 | #include "fsmap.h" | |
25 | #include <trace/events/ext4.h> | |
ac27a0ec | 26 | |
393d1d1d DTB |
27 | /** |
28 | * Swap memory between @a and @b for @len bytes. | |
29 | * | |
30 | * @a: pointer to first memory area | |
31 | * @b: pointer to second memory area | |
32 | * @len: number of bytes to swap | |
33 | * | |
34 | */ | |
35 | static void memswap(void *a, void *b, size_t len) | |
36 | { | |
37 | unsigned char *ap, *bp; | |
393d1d1d DTB |
38 | |
39 | ap = (unsigned char *)a; | |
40 | bp = (unsigned char *)b; | |
41 | while (len-- > 0) { | |
4b7e2db5 | 42 | swap(*ap, *bp); |
393d1d1d DTB |
43 | ap++; |
44 | bp++; | |
45 | } | |
46 | } | |
47 | ||
48 | /** | |
49 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
50 | * This function is used for the primary swap between inode1 and inode2 | |
51 | * and also to revert this primary swap in case of errors. | |
52 | * | |
53 | * Therefore you have to make sure, that calling this method twice | |
54 | * will revert all changes. | |
55 | * | |
56 | * @inode1: pointer to first inode | |
57 | * @inode2: pointer to second inode | |
58 | */ | |
59 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
60 | { | |
61 | loff_t isize; | |
62 | struct ext4_inode_info *ei1; | |
63 | struct ext4_inode_info *ei2; | |
64 | ||
65 | ei1 = EXT4_I(inode1); | |
66 | ei2 = EXT4_I(inode2); | |
67 | ||
9c5d58fb JL |
68 | swap(inode1->i_flags, inode2->i_flags); |
69 | swap(inode1->i_version, inode2->i_version); | |
70 | swap(inode1->i_blocks, inode2->i_blocks); | |
71 | swap(inode1->i_bytes, inode2->i_bytes); | |
72 | swap(inode1->i_atime, inode2->i_atime); | |
73 | swap(inode1->i_mtime, inode2->i_mtime); | |
393d1d1d DTB |
74 | |
75 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
9c5d58fb JL |
76 | swap(ei1->i_flags, ei2->i_flags); |
77 | swap(ei1->i_disksize, ei2->i_disksize); | |
cde2d7a7 TT |
78 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
79 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
80 | |
81 | isize = i_size_read(inode1); | |
82 | i_size_write(inode1, i_size_read(inode2)); | |
83 | i_size_write(inode2, isize); | |
84 | } | |
85 | ||
86 | /** | |
87 | * Swap the information from the given @inode and the inode | |
88 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
89 | * important fields of the inodes. | |
90 | * | |
91 | * @sb: the super block of the filesystem | |
92 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
93 | * | |
94 | */ | |
95 | static long swap_inode_boot_loader(struct super_block *sb, | |
96 | struct inode *inode) | |
97 | { | |
98 | handle_t *handle; | |
99 | int err; | |
100 | struct inode *inode_bl; | |
393d1d1d | 101 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 102 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 103 | |
d8558a29 TT |
104 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
105 | return -EINVAL; | |
393d1d1d | 106 | |
d8558a29 TT |
107 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
108 | return -EPERM; | |
393d1d1d | 109 | |
393d1d1d | 110 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
111 | if (IS_ERR(inode_bl)) |
112 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
113 | ei_bl = EXT4_I(inode_bl); |
114 | ||
115 | filemap_flush(inode->i_mapping); | |
116 | filemap_flush(inode_bl->i_mapping); | |
117 | ||
118 | /* Protect orig inodes against a truncate and make sure, | |
119 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 120 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
121 | |
122 | truncate_inode_pages(&inode->i_data, 0); | |
123 | truncate_inode_pages(&inode_bl->i_data, 0); | |
124 | ||
125 | /* Wait for all existing dio workers */ | |
126 | ext4_inode_block_unlocked_dio(inode); | |
127 | ext4_inode_block_unlocked_dio(inode_bl); | |
128 | inode_dio_wait(inode); | |
129 | inode_dio_wait(inode_bl); | |
130 | ||
131 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
132 | if (IS_ERR(handle)) { | |
133 | err = -EINVAL; | |
30d29b11 | 134 | goto journal_err_out; |
393d1d1d DTB |
135 | } |
136 | ||
137 | /* Protect extent tree against block allocations via delalloc */ | |
138 | ext4_double_down_write_data_sem(inode, inode_bl); | |
139 | ||
140 | if (inode_bl->i_nlink == 0) { | |
141 | /* this inode has never been used as a BOOT_LOADER */ | |
142 | set_nlink(inode_bl, 1); | |
143 | i_uid_write(inode_bl, 0); | |
144 | i_gid_write(inode_bl, 0); | |
145 | inode_bl->i_flags = 0; | |
146 | ei_bl->i_flags = 0; | |
147 | inode_bl->i_version = 1; | |
148 | i_size_write(inode_bl, 0); | |
149 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 150 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
151 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
152 | ext4_ext_tree_init(handle, inode_bl); | |
153 | } else | |
154 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
155 | } | |
156 | ||
157 | swap_inode_data(inode, inode_bl); | |
158 | ||
eeca7ea1 | 159 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d DTB |
160 | |
161 | spin_lock(&sbi->s_next_gen_lock); | |
162 | inode->i_generation = sbi->s_next_generation++; | |
163 | inode_bl->i_generation = sbi->s_next_generation++; | |
164 | spin_unlock(&sbi->s_next_gen_lock); | |
165 | ||
166 | ext4_discard_preallocations(inode); | |
167 | ||
168 | err = ext4_mark_inode_dirty(handle, inode); | |
169 | if (err < 0) { | |
170 | ext4_warning(inode->i_sb, | |
171 | "couldn't mark inode #%lu dirty (err %d)", | |
172 | inode->i_ino, err); | |
173 | /* Revert all changes: */ | |
174 | swap_inode_data(inode, inode_bl); | |
175 | } else { | |
176 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
177 | if (err < 0) { | |
178 | ext4_warning(inode_bl->i_sb, | |
179 | "couldn't mark inode #%lu dirty (err %d)", | |
180 | inode_bl->i_ino, err); | |
181 | /* Revert all changes: */ | |
182 | swap_inode_data(inode, inode_bl); | |
183 | ext4_mark_inode_dirty(handle, inode); | |
184 | } | |
185 | } | |
393d1d1d | 186 | ext4_journal_stop(handle); |
393d1d1d DTB |
187 | ext4_double_up_write_data_sem(inode, inode_bl); |
188 | ||
30d29b11 | 189 | journal_err_out: |
393d1d1d DTB |
190 | ext4_inode_resume_unlocked_dio(inode); |
191 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 192 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 193 | iput(inode_bl); |
393d1d1d DTB |
194 | return err; |
195 | } | |
196 | ||
ba679017 | 197 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
198 | static int uuid_is_zero(__u8 u[16]) |
199 | { | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < 16; i++) | |
203 | if (u[i]) | |
204 | return 0; | |
205 | return 1; | |
206 | } | |
ba679017 | 207 | #endif |
9bd8212f | 208 | |
9b7365fc LX |
209 | static int ext4_ioctl_setflags(struct inode *inode, |
210 | unsigned int flags) | |
211 | { | |
212 | struct ext4_inode_info *ei = EXT4_I(inode); | |
213 | handle_t *handle = NULL; | |
fdde368e | 214 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
215 | struct ext4_iloc iloc; |
216 | unsigned int oldflags, mask, i; | |
217 | unsigned int jflag; | |
218 | ||
219 | /* Is it quota file? Do not allow user to mess with it */ | |
02749a4c | 220 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
221 | goto flags_out; |
222 | ||
223 | oldflags = ei->i_flags; | |
224 | ||
225 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
226 | jflag = flags & EXT4_JOURNAL_DATA_FL; | |
227 | ||
228 | /* | |
229 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
230 | * the relevant capability. | |
231 | * | |
232 | * This test looks nicer. Thanks to Pauline Middelink | |
233 | */ | |
234 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { | |
235 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
236 | goto flags_out; | |
237 | } | |
238 | ||
239 | /* | |
240 | * The JOURNAL_DATA flag can only be changed by | |
241 | * the relevant capability. | |
242 | */ | |
243 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { | |
244 | if (!capable(CAP_SYS_RESOURCE)) | |
245 | goto flags_out; | |
246 | } | |
247 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) | |
248 | migrate = 1; | |
249 | ||
250 | if (flags & EXT4_EOFBLOCKS_FL) { | |
251 | /* we don't support adding EOFBLOCKS flag */ | |
252 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
253 | err = -EOPNOTSUPP; | |
254 | goto flags_out; | |
255 | } | |
2c98eb5e TT |
256 | } else if (oldflags & EXT4_EOFBLOCKS_FL) { |
257 | err = ext4_truncate(inode); | |
258 | if (err) | |
259 | goto flags_out; | |
260 | } | |
9b7365fc LX |
261 | |
262 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
263 | if (IS_ERR(handle)) { | |
264 | err = PTR_ERR(handle); | |
265 | goto flags_out; | |
266 | } | |
267 | if (IS_SYNC(inode)) | |
268 | ext4_handle_sync(handle); | |
269 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
270 | if (err) | |
271 | goto flags_err; | |
272 | ||
273 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
274 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
275 | continue; | |
f8011d93 JK |
276 | /* These flags get special treatment later */ |
277 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
278 | continue; | |
9b7365fc LX |
279 | if (mask & flags) |
280 | ext4_set_inode_flag(inode, i); | |
281 | else | |
282 | ext4_clear_inode_flag(inode, i); | |
283 | } | |
284 | ||
285 | ext4_set_inode_flags(inode); | |
eeca7ea1 | 286 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
287 | |
288 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
289 | flags_err: | |
290 | ext4_journal_stop(handle); | |
291 | if (err) | |
292 | goto flags_out; | |
293 | ||
294 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) | |
295 | err = ext4_change_inode_journal_flag(inode, jflag); | |
296 | if (err) | |
297 | goto flags_out; | |
298 | if (migrate) { | |
299 | if (flags & EXT4_EXTENTS_FL) | |
300 | err = ext4_ext_migrate(inode); | |
301 | else | |
302 | err = ext4_ind_migrate(inode); | |
303 | } | |
304 | ||
305 | flags_out: | |
306 | return err; | |
307 | } | |
308 | ||
309 | #ifdef CONFIG_QUOTA | |
310 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
311 | { | |
312 | struct inode *inode = file_inode(filp); | |
313 | struct super_block *sb = inode->i_sb; | |
314 | struct ext4_inode_info *ei = EXT4_I(inode); | |
315 | int err, rc; | |
316 | handle_t *handle; | |
317 | kprojid_t kprojid; | |
318 | struct ext4_iloc iloc; | |
319 | struct ext4_inode *raw_inode; | |
079788d0 | 320 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 321 | |
0b7b7779 | 322 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
323 | if (projid != EXT4_DEF_PROJID) |
324 | return -EOPNOTSUPP; | |
325 | else | |
326 | return 0; | |
327 | } | |
328 | ||
329 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
330 | return -EOPNOTSUPP; | |
331 | ||
332 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
333 | ||
334 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
335 | return 0; | |
336 | ||
337 | err = mnt_want_write_file(filp); | |
338 | if (err) | |
339 | return err; | |
340 | ||
341 | err = -EPERM; | |
5955102c | 342 | inode_lock(inode); |
9b7365fc | 343 | /* Is it quota file? Do not allow user to mess with it */ |
02749a4c | 344 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
345 | goto out_unlock; |
346 | ||
347 | err = ext4_get_inode_loc(inode, &iloc); | |
348 | if (err) | |
349 | goto out_unlock; | |
350 | ||
351 | raw_inode = ext4_raw_inode(&iloc); | |
352 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
c03b45b8 MX |
353 | err = ext4_expand_extra_isize(inode, |
354 | EXT4_SB(sb)->s_want_extra_isize, | |
355 | &iloc); | |
356 | if (err) | |
357 | goto out_unlock; | |
358 | } else { | |
9b7365fc | 359 | brelse(iloc.bh); |
9b7365fc | 360 | } |
9b7365fc LX |
361 | |
362 | dquot_initialize(inode); | |
363 | ||
364 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
365 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
366 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
367 | if (IS_ERR(handle)) { | |
368 | err = PTR_ERR(handle); | |
369 | goto out_unlock; | |
370 | } | |
371 | ||
372 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
373 | if (err) | |
374 | goto out_stop; | |
375 | ||
079788d0 WS |
376 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
377 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
7a9ca53a TE |
378 | |
379 | /* __dquot_transfer() calls back ext4_get_inode_usage() which | |
380 | * counts xattr inode references. | |
381 | */ | |
382 | down_read(&EXT4_I(inode)->xattr_sem); | |
079788d0 | 383 | err = __dquot_transfer(inode, transfer_to); |
7a9ca53a | 384 | up_read(&EXT4_I(inode)->xattr_sem); |
079788d0 WS |
385 | dqput(transfer_to[PRJQUOTA]); |
386 | if (err) | |
387 | goto out_dirty; | |
9b7365fc | 388 | } |
079788d0 | 389 | |
9b7365fc | 390 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 391 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
392 | out_dirty: |
393 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
394 | if (!err) | |
395 | err = rc; | |
396 | out_stop: | |
397 | ext4_journal_stop(handle); | |
398 | out_unlock: | |
5955102c | 399 | inode_unlock(inode); |
9b7365fc LX |
400 | mnt_drop_write_file(filp); |
401 | return err; | |
402 | } | |
403 | #else | |
404 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
405 | { | |
406 | if (projid != EXT4_DEF_PROJID) | |
407 | return -EOPNOTSUPP; | |
408 | return 0; | |
409 | } | |
410 | #endif | |
411 | ||
412 | /* Transfer internal flags to xflags */ | |
413 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
414 | { | |
415 | __u32 xflags = 0; | |
416 | ||
417 | if (iflags & EXT4_SYNC_FL) | |
418 | xflags |= FS_XFLAG_SYNC; | |
419 | if (iflags & EXT4_IMMUTABLE_FL) | |
420 | xflags |= FS_XFLAG_IMMUTABLE; | |
421 | if (iflags & EXT4_APPEND_FL) | |
422 | xflags |= FS_XFLAG_APPEND; | |
423 | if (iflags & EXT4_NODUMP_FL) | |
424 | xflags |= FS_XFLAG_NODUMP; | |
425 | if (iflags & EXT4_NOATIME_FL) | |
426 | xflags |= FS_XFLAG_NOATIME; | |
427 | if (iflags & EXT4_PROJINHERIT_FL) | |
428 | xflags |= FS_XFLAG_PROJINHERIT; | |
429 | return xflags; | |
430 | } | |
431 | ||
d14e7683 JK |
432 | #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
433 | FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ | |
434 | FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) | |
435 | ||
9b7365fc LX |
436 | /* Transfer xflags flags to internal */ |
437 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
438 | { | |
439 | unsigned long iflags = 0; | |
440 | ||
441 | if (xflags & FS_XFLAG_SYNC) | |
442 | iflags |= EXT4_SYNC_FL; | |
443 | if (xflags & FS_XFLAG_IMMUTABLE) | |
444 | iflags |= EXT4_IMMUTABLE_FL; | |
445 | if (xflags & FS_XFLAG_APPEND) | |
446 | iflags |= EXT4_APPEND_FL; | |
447 | if (xflags & FS_XFLAG_NODUMP) | |
448 | iflags |= EXT4_NODUMP_FL; | |
449 | if (xflags & FS_XFLAG_NOATIME) | |
450 | iflags |= EXT4_NOATIME_FL; | |
451 | if (xflags & FS_XFLAG_PROJINHERIT) | |
452 | iflags |= EXT4_PROJINHERIT_FL; | |
453 | ||
454 | return iflags; | |
455 | } | |
456 | ||
1a20a630 | 457 | static int ext4_shutdown(struct super_block *sb, unsigned long arg) |
783d9485 TT |
458 | { |
459 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
460 | __u32 flags; | |
461 | ||
462 | if (!capable(CAP_SYS_ADMIN)) | |
463 | return -EPERM; | |
464 | ||
465 | if (get_user(flags, (__u32 __user *)arg)) | |
466 | return -EFAULT; | |
467 | ||
468 | if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) | |
469 | return -EINVAL; | |
470 | ||
471 | if (ext4_forced_shutdown(sbi)) | |
472 | return 0; | |
473 | ||
474 | ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); | |
475 | ||
476 | switch (flags) { | |
477 | case EXT4_GOING_FLAGS_DEFAULT: | |
478 | freeze_bdev(sb->s_bdev); | |
479 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
480 | thaw_bdev(sb->s_bdev, sb); | |
481 | break; | |
482 | case EXT4_GOING_FLAGS_LOGFLUSH: | |
483 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
484 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
485 | (void) ext4_force_commit(sb); | |
486 | jbd2_journal_abort(sbi->s_journal, 0); | |
487 | } | |
488 | break; | |
489 | case EXT4_GOING_FLAGS_NOLOGFLUSH: | |
490 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
491 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
492 | msleep(100); | |
493 | jbd2_journal_abort(sbi->s_journal, 0); | |
494 | } | |
495 | break; | |
496 | default: | |
497 | return -EINVAL; | |
498 | } | |
499 | clear_opt(sb, DISCARD); | |
500 | return 0; | |
501 | } | |
502 | ||
0c9ec4be DW |
503 | struct getfsmap_info { |
504 | struct super_block *gi_sb; | |
505 | struct fsmap_head __user *gi_data; | |
506 | unsigned int gi_idx; | |
507 | __u32 gi_last_flags; | |
508 | }; | |
509 | ||
510 | static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) | |
511 | { | |
512 | struct getfsmap_info *info = priv; | |
513 | struct fsmap fm; | |
514 | ||
515 | trace_ext4_getfsmap_mapping(info->gi_sb, xfm); | |
516 | ||
517 | info->gi_last_flags = xfm->fmr_flags; | |
518 | ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); | |
519 | if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, | |
520 | sizeof(struct fsmap))) | |
521 | return -EFAULT; | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static int ext4_ioc_getfsmap(struct super_block *sb, | |
527 | struct fsmap_head __user *arg) | |
528 | { | |
529 | struct getfsmap_info info = {0}; | |
530 | struct ext4_fsmap_head xhead = {0}; | |
531 | struct fsmap_head head; | |
532 | bool aborted = false; | |
533 | int error; | |
534 | ||
535 | if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) | |
536 | return -EFAULT; | |
537 | if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || | |
538 | memchr_inv(head.fmh_keys[0].fmr_reserved, 0, | |
539 | sizeof(head.fmh_keys[0].fmr_reserved)) || | |
540 | memchr_inv(head.fmh_keys[1].fmr_reserved, 0, | |
541 | sizeof(head.fmh_keys[1].fmr_reserved))) | |
542 | return -EINVAL; | |
543 | /* | |
544 | * ext4 doesn't report file extents at all, so the only valid | |
545 | * file offsets are the magic ones (all zeroes or all ones). | |
546 | */ | |
547 | if (head.fmh_keys[0].fmr_offset || | |
548 | (head.fmh_keys[1].fmr_offset != 0 && | |
549 | head.fmh_keys[1].fmr_offset != -1ULL)) | |
550 | return -EINVAL; | |
551 | ||
552 | xhead.fmh_iflags = head.fmh_iflags; | |
553 | xhead.fmh_count = head.fmh_count; | |
554 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); | |
555 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); | |
556 | ||
557 | trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); | |
558 | trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); | |
559 | ||
560 | info.gi_sb = sb; | |
561 | info.gi_data = arg; | |
562 | error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); | |
563 | if (error == EXT4_QUERY_RANGE_ABORT) { | |
564 | error = 0; | |
565 | aborted = true; | |
566 | } else if (error) | |
567 | return error; | |
568 | ||
569 | /* If we didn't abort, set the "last" flag in the last fmx */ | |
570 | if (!aborted && info.gi_idx) { | |
571 | info.gi_last_flags |= FMR_OF_LAST; | |
572 | if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, | |
573 | &info.gi_last_flags, | |
574 | sizeof(info.gi_last_flags))) | |
575 | return -EFAULT; | |
576 | } | |
577 | ||
578 | /* copy back header */ | |
579 | head.fmh_entries = xhead.fmh_entries; | |
580 | head.fmh_oflags = xhead.fmh_oflags; | |
581 | if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) | |
582 | return -EFAULT; | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
5cdd7b2d | 587 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 588 | { |
496ad9aa | 589 | struct inode *inode = file_inode(filp); |
bab08ab9 | 590 | struct super_block *sb = inode->i_sb; |
617ba13b | 591 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 592 | unsigned int flags; |
ac27a0ec | 593 | |
af5bc92d | 594 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
595 | |
596 | switch (cmd) { | |
0c9ec4be DW |
597 | case FS_IOC_GETFSMAP: |
598 | return ext4_ioc_getfsmap(sb, (void __user *)arg); | |
617ba13b MC |
599 | case EXT4_IOC_GETFLAGS: |
600 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; | |
ac27a0ec | 601 | return put_user(flags, (int __user *) arg); |
617ba13b | 602 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 603 | int err; |
ac27a0ec | 604 | |
2e149670 | 605 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
606 | return -EACCES; |
607 | ||
608 | if (get_user(flags, (int __user *) arg)) | |
609 | return -EFAULT; | |
610 | ||
d14e7683 JK |
611 | if (flags & ~EXT4_FL_USER_VISIBLE) |
612 | return -EOPNOTSUPP; | |
613 | /* | |
614 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
615 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
616 | * more restrictive than just silently masking off visible but | |
617 | * not settable flags as we always did. | |
618 | */ | |
619 | flags &= EXT4_FL_USER_MODIFIABLE; | |
620 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
621 | return -EOPNOTSUPP; | |
622 | ||
a561be71 | 623 | err = mnt_want_write_file(filp); |
42a74f20 DH |
624 | if (err) |
625 | return err; | |
626 | ||
5955102c | 627 | inode_lock(inode); |
9b7365fc | 628 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 629 | inode_unlock(inode); |
2a79f17e | 630 | mnt_drop_write_file(filp); |
ac27a0ec DK |
631 | return err; |
632 | } | |
617ba13b MC |
633 | case EXT4_IOC_GETVERSION: |
634 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 635 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
636 | case EXT4_IOC_SETVERSION: |
637 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 638 | handle_t *handle; |
617ba13b | 639 | struct ext4_iloc iloc; |
ac27a0ec DK |
640 | __u32 generation; |
641 | int err; | |
642 | ||
2e149670 | 643 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 644 | return -EPERM; |
42a74f20 | 645 | |
9aa5d32b | 646 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
647 | ext4_warning(sb, "Setting inode version is not " |
648 | "supported with metadata_csum enabled."); | |
649 | return -ENOTTY; | |
650 | } | |
651 | ||
a561be71 | 652 | err = mnt_want_write_file(filp); |
42a74f20 DH |
653 | if (err) |
654 | return err; | |
655 | if (get_user(generation, (int __user *) arg)) { | |
656 | err = -EFAULT; | |
657 | goto setversion_out; | |
658 | } | |
ac27a0ec | 659 | |
5955102c | 660 | inode_lock(inode); |
9924a92a | 661 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
662 | if (IS_ERR(handle)) { |
663 | err = PTR_ERR(handle); | |
6c2155b9 | 664 | goto unlock_out; |
42a74f20 | 665 | } |
617ba13b | 666 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 667 | if (err == 0) { |
eeca7ea1 | 668 | inode->i_ctime = current_time(inode); |
ac27a0ec | 669 | inode->i_generation = generation; |
617ba13b | 670 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 671 | } |
617ba13b | 672 | ext4_journal_stop(handle); |
6c2155b9 DH |
673 | |
674 | unlock_out: | |
5955102c | 675 | inode_unlock(inode); |
42a74f20 | 676 | setversion_out: |
2a79f17e | 677 | mnt_drop_write_file(filp); |
ac27a0ec DK |
678 | return err; |
679 | } | |
617ba13b MC |
680 | case EXT4_IOC_GROUP_EXTEND: { |
681 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 682 | int err, err2=0; |
ac27a0ec | 683 | |
8f82f840 YY |
684 | err = ext4_resize_begin(sb); |
685 | if (err) | |
686 | return err; | |
ac27a0ec | 687 | |
014a1770 DH |
688 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
689 | err = -EFAULT; | |
690 | goto group_extend_out; | |
691 | } | |
ac27a0ec | 692 | |
e2b911c5 | 693 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
694 | ext4_msg(sb, KERN_ERR, |
695 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
696 | err = -EOPNOTSUPP; |
697 | goto group_extend_out; | |
bab08ab9 TT |
698 | } |
699 | ||
a561be71 | 700 | err = mnt_want_write_file(filp); |
42a74f20 | 701 | if (err) |
014a1770 | 702 | goto group_extend_out; |
42a74f20 | 703 | |
617ba13b | 704 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
705 | if (EXT4_SB(sb)->s_journal) { |
706 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
707 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
708 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
709 | } | |
7ffe1ea8 HK |
710 | if (err == 0) |
711 | err = err2; | |
2a79f17e | 712 | mnt_drop_write_file(filp); |
014a1770 | 713 | group_extend_out: |
8f82f840 | 714 | ext4_resize_end(sb); |
ac27a0ec DK |
715 | return err; |
716 | } | |
748de673 AF |
717 | |
718 | case EXT4_IOC_MOVE_EXT: { | |
719 | struct move_extent me; | |
2903ff01 AV |
720 | struct fd donor; |
721 | int err; | |
748de673 | 722 | |
4a58579b AF |
723 | if (!(filp->f_mode & FMODE_READ) || |
724 | !(filp->f_mode & FMODE_WRITE)) | |
725 | return -EBADF; | |
726 | ||
748de673 AF |
727 | if (copy_from_user(&me, |
728 | (struct move_extent __user *)arg, sizeof(me))) | |
729 | return -EFAULT; | |
4a58579b | 730 | me.moved_len = 0; |
748de673 | 731 | |
2903ff01 AV |
732 | donor = fdget(me.donor_fd); |
733 | if (!donor.file) | |
748de673 AF |
734 | return -EBADF; |
735 | ||
2903ff01 | 736 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
737 | err = -EBADF; |
738 | goto mext_out; | |
748de673 AF |
739 | } |
740 | ||
e2b911c5 | 741 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
742 | ext4_msg(sb, KERN_ERR, |
743 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
744 | err = -EOPNOTSUPP; |
745 | goto mext_out; | |
73f34a5e RZ |
746 | } else if (IS_DAX(inode)) { |
747 | ext4_msg(sb, KERN_ERR, | |
748 | "Online defrag not supported with DAX"); | |
749 | err = -EOPNOTSUPP; | |
750 | goto mext_out; | |
bab08ab9 TT |
751 | } |
752 | ||
a561be71 | 753 | err = mnt_want_write_file(filp); |
4a58579b AF |
754 | if (err) |
755 | goto mext_out; | |
756 | ||
2903ff01 | 757 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 758 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 759 | mnt_drop_write_file(filp); |
748de673 | 760 | |
60e6679e | 761 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 762 | &me, sizeof(me))) |
4a58579b AF |
763 | err = -EFAULT; |
764 | mext_out: | |
2903ff01 | 765 | fdput(donor); |
748de673 AF |
766 | return err; |
767 | } | |
768 | ||
617ba13b MC |
769 | case EXT4_IOC_GROUP_ADD: { |
770 | struct ext4_new_group_data input; | |
ac046f1d | 771 | int err, err2=0; |
ac27a0ec | 772 | |
8f82f840 YY |
773 | err = ext4_resize_begin(sb); |
774 | if (err) | |
775 | return err; | |
ac27a0ec | 776 | |
617ba13b | 777 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
778 | sizeof(input))) { |
779 | err = -EFAULT; | |
780 | goto group_add_out; | |
781 | } | |
ac27a0ec | 782 | |
e2b911c5 | 783 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
784 | ext4_msg(sb, KERN_ERR, |
785 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
786 | err = -EOPNOTSUPP; |
787 | goto group_add_out; | |
bab08ab9 TT |
788 | } |
789 | ||
a561be71 | 790 | err = mnt_want_write_file(filp); |
42a74f20 | 791 | if (err) |
014a1770 | 792 | goto group_add_out; |
42a74f20 | 793 | |
617ba13b | 794 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
795 | if (EXT4_SB(sb)->s_journal) { |
796 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
797 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
798 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
799 | } | |
7ffe1ea8 HK |
800 | if (err == 0) |
801 | err = err2; | |
2a79f17e | 802 | mnt_drop_write_file(filp); |
7f511862 TT |
803 | if (!err && ext4_has_group_desc_csum(sb) && |
804 | test_opt(sb, INIT_INODE_TABLE)) | |
805 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 806 | group_add_out: |
8f82f840 | 807 | ext4_resize_end(sb); |
ac27a0ec DK |
808 | return err; |
809 | } | |
810 | ||
c14c6fd5 | 811 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
812 | { |
813 | int err; | |
2e149670 | 814 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
815 | return -EACCES; |
816 | ||
a561be71 | 817 | err = mnt_want_write_file(filp); |
2a43a878 AK |
818 | if (err) |
819 | return err; | |
820 | /* | |
821 | * inode_mutex prevent write and truncate on the file. | |
822 | * Read still goes through. We take i_data_sem in | |
823 | * ext4_ext_swap_inode_data before we switch the | |
824 | * inode format to prevent read. | |
825 | */ | |
5955102c | 826 | inode_lock((inode)); |
2a43a878 | 827 | err = ext4_ext_migrate(inode); |
5955102c | 828 | inode_unlock((inode)); |
2a79f17e | 829 | mnt_drop_write_file(filp); |
2a43a878 AK |
830 | return err; |
831 | } | |
c14c6fd5 | 832 | |
ccd2506b TT |
833 | case EXT4_IOC_ALLOC_DA_BLKS: |
834 | { | |
835 | int err; | |
2e149670 | 836 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
837 | return -EACCES; |
838 | ||
a561be71 | 839 | err = mnt_want_write_file(filp); |
ccd2506b TT |
840 | if (err) |
841 | return err; | |
842 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 843 | mnt_drop_write_file(filp); |
ccd2506b TT |
844 | return err; |
845 | } | |
846 | ||
393d1d1d | 847 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
848 | { |
849 | int err; | |
393d1d1d DTB |
850 | if (!(filp->f_mode & FMODE_WRITE)) |
851 | return -EBADF; | |
3e67cfad DM |
852 | err = mnt_want_write_file(filp); |
853 | if (err) | |
854 | return err; | |
855 | err = swap_inode_boot_loader(sb, inode); | |
856 | mnt_drop_write_file(filp); | |
857 | return err; | |
858 | } | |
393d1d1d | 859 | |
19c5246d YY |
860 | case EXT4_IOC_RESIZE_FS: { |
861 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 862 | int err = 0, err2 = 0; |
7f511862 | 863 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 864 | |
e2b911c5 | 865 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
866 | ext4_msg(sb, KERN_ERR, |
867 | "Online resizing not (yet) supported with bigalloc"); | |
868 | return -EOPNOTSUPP; | |
869 | } | |
870 | ||
19c5246d YY |
871 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
872 | sizeof(__u64))) { | |
873 | return -EFAULT; | |
874 | } | |
875 | ||
19c5246d YY |
876 | err = ext4_resize_begin(sb); |
877 | if (err) | |
878 | return err; | |
879 | ||
8cae6f71 | 880 | err = mnt_want_write_file(filp); |
19c5246d YY |
881 | if (err) |
882 | goto resizefs_out; | |
883 | ||
884 | err = ext4_resize_fs(sb, n_blocks_count); | |
885 | if (EXT4_SB(sb)->s_journal) { | |
886 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
887 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
888 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
889 | } | |
890 | if (err == 0) | |
891 | err = err2; | |
8cae6f71 | 892 | mnt_drop_write_file(filp); |
7f511862 TT |
893 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
894 | ext4_has_group_desc_csum(sb) && | |
895 | test_opt(sb, INIT_INODE_TABLE)) | |
896 | err = ext4_register_li_request(sb, o_group); | |
897 | ||
19c5246d YY |
898 | resizefs_out: |
899 | ext4_resize_end(sb); | |
900 | return err; | |
901 | } | |
902 | ||
e681c047 LC |
903 | case FITRIM: |
904 | { | |
41431792 | 905 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
906 | struct fstrim_range range; |
907 | int ret = 0; | |
908 | ||
909 | if (!capable(CAP_SYS_ADMIN)) | |
910 | return -EPERM; | |
911 | ||
41431792 LC |
912 | if (!blk_queue_discard(q)) |
913 | return -EOPNOTSUPP; | |
914 | ||
e6705f7c | 915 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
916 | sizeof(range))) |
917 | return -EFAULT; | |
918 | ||
5c2ed62f LC |
919 | range.minlen = max((unsigned int)range.minlen, |
920 | q->limits.discard_granularity); | |
e681c047 LC |
921 | ret = ext4_trim_fs(sb, &range); |
922 | if (ret < 0) | |
923 | return ret; | |
924 | ||
e6705f7c | 925 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
926 | sizeof(range))) |
927 | return -EFAULT; | |
928 | ||
929 | return 0; | |
930 | } | |
7869a4a6 TT |
931 | case EXT4_IOC_PRECACHE_EXTENTS: |
932 | return ext4_ext_precache(inode); | |
9bd8212f | 933 | |
db717d8e | 934 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
935 | if (!ext4_has_feature_encrypt(sb)) |
936 | return -EOPNOTSUPP; | |
db717d8e | 937 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 938 | |
9bd8212f | 939 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
ba679017 | 940 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
941 | int err, err2; |
942 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
943 | handle_t *handle; | |
944 | ||
35997d1c | 945 | if (!ext4_has_feature_encrypt(sb)) |
9bd8212f MH |
946 | return -EOPNOTSUPP; |
947 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
948 | err = mnt_want_write_file(filp); | |
949 | if (err) | |
950 | return err; | |
951 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
952 | if (IS_ERR(handle)) { | |
953 | err = PTR_ERR(handle); | |
954 | goto pwsalt_err_exit; | |
955 | } | |
956 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
957 | if (err) | |
958 | goto pwsalt_err_journal; | |
959 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
960 | err = ext4_handle_dirty_metadata(handle, NULL, | |
961 | sbi->s_sbh); | |
962 | pwsalt_err_journal: | |
963 | err2 = ext4_journal_stop(handle); | |
964 | if (err2 && !err) | |
965 | err = err2; | |
966 | pwsalt_err_exit: | |
967 | mnt_drop_write_file(filp); | |
968 | if (err) | |
969 | return err; | |
970 | } | |
b4ab9e29 FF |
971 | if (copy_to_user((void __user *) arg, |
972 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
973 | return -EFAULT; |
974 | return 0; | |
ba679017 EB |
975 | #else |
976 | return -EOPNOTSUPP; | |
977 | #endif | |
9bd8212f | 978 | } |
db717d8e EB |
979 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
980 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); | |
9bd8212f | 981 | |
9b7365fc LX |
982 | case EXT4_IOC_FSGETXATTR: |
983 | { | |
984 | struct fsxattr fa; | |
985 | ||
986 | memset(&fa, 0, sizeof(struct fsxattr)); | |
9b7365fc LX |
987 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); |
988 | ||
0b7b7779 | 989 | if (ext4_has_feature_project(inode->i_sb)) { |
9b7365fc LX |
990 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
991 | EXT4_I(inode)->i_projid); | |
992 | } | |
993 | ||
994 | if (copy_to_user((struct fsxattr __user *)arg, | |
995 | &fa, sizeof(fa))) | |
996 | return -EFAULT; | |
997 | return 0; | |
998 | } | |
999 | case EXT4_IOC_FSSETXATTR: | |
1000 | { | |
1001 | struct fsxattr fa; | |
1002 | int err; | |
1003 | ||
1004 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
1005 | sizeof(fa))) | |
1006 | return -EFAULT; | |
1007 | ||
1008 | /* Make sure caller has proper permission */ | |
1009 | if (!inode_owner_or_capable(inode)) | |
1010 | return -EACCES; | |
1011 | ||
d14e7683 JK |
1012 | if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) |
1013 | return -EOPNOTSUPP; | |
1014 | ||
1015 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
1016 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
1017 | return -EOPNOTSUPP; | |
1018 | ||
9b7365fc LX |
1019 | err = mnt_want_write_file(filp); |
1020 | if (err) | |
1021 | return err; | |
1022 | ||
5955102c | 1023 | inode_lock(inode); |
9b7365fc LX |
1024 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
1025 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
1026 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 1027 | inode_unlock(inode); |
9b7365fc LX |
1028 | mnt_drop_write_file(filp); |
1029 | if (err) | |
1030 | return err; | |
1031 | ||
1032 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
1033 | if (err) | |
1034 | return err; | |
1035 | ||
1036 | return 0; | |
1037 | } | |
e9be2ac7 TT |
1038 | case EXT4_IOC_SHUTDOWN: |
1039 | return ext4_shutdown(sb, arg); | |
ac27a0ec DK |
1040 | default: |
1041 | return -ENOTTY; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | #ifdef CONFIG_COMPAT | |
617ba13b | 1046 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1047 | { |
ac27a0ec DK |
1048 | /* These are just misnamed, they actually get/put from/to user an int */ |
1049 | switch (cmd) { | |
617ba13b MC |
1050 | case EXT4_IOC32_GETFLAGS: |
1051 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 1052 | break; |
617ba13b MC |
1053 | case EXT4_IOC32_SETFLAGS: |
1054 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 1055 | break; |
617ba13b MC |
1056 | case EXT4_IOC32_GETVERSION: |
1057 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 1058 | break; |
617ba13b MC |
1059 | case EXT4_IOC32_SETVERSION: |
1060 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 1061 | break; |
617ba13b MC |
1062 | case EXT4_IOC32_GROUP_EXTEND: |
1063 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 1064 | break; |
617ba13b MC |
1065 | case EXT4_IOC32_GETVERSION_OLD: |
1066 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 1067 | break; |
617ba13b MC |
1068 | case EXT4_IOC32_SETVERSION_OLD: |
1069 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 1070 | break; |
617ba13b MC |
1071 | case EXT4_IOC32_GETRSVSZ: |
1072 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 1073 | break; |
617ba13b MC |
1074 | case EXT4_IOC32_SETRSVSZ: |
1075 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 1076 | break; |
4d92dc0f BH |
1077 | case EXT4_IOC32_GROUP_ADD: { |
1078 | struct compat_ext4_new_group_input __user *uinput; | |
1079 | struct ext4_new_group_input input; | |
1080 | mm_segment_t old_fs; | |
1081 | int err; | |
1082 | ||
1083 | uinput = compat_ptr(arg); | |
1084 | err = get_user(input.group, &uinput->group); | |
1085 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
1086 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
1087 | err |= get_user(input.inode_table, &uinput->inode_table); | |
1088 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
1089 | err |= get_user(input.reserved_blocks, | |
1090 | &uinput->reserved_blocks); | |
1091 | if (err) | |
1092 | return -EFAULT; | |
1093 | old_fs = get_fs(); | |
1094 | set_fs(KERNEL_DS); | |
1095 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
1096 | (unsigned long) &input); | |
1097 | set_fs(old_fs); | |
1098 | return err; | |
1099 | } | |
b684b2ee | 1100 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 1101 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 1102 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
1103 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
1104 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
1105 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
e9be2ac7 | 1106 | case EXT4_IOC_SHUTDOWN: |
0c9ec4be | 1107 | case FS_IOC_GETFSMAP: |
b684b2ee | 1108 | break; |
ac27a0ec DK |
1109 | default: |
1110 | return -ENOIOCTLCMD; | |
1111 | } | |
5cdd7b2d | 1112 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
1113 | } |
1114 | #endif |