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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/ioctl.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | */ | |
9 | ||
10 | #include <linux/fs.h> | |
ac27a0ec | 11 | #include <linux/capability.h> |
ac27a0ec DK |
12 | #include <linux/time.h> |
13 | #include <linux/compat.h> | |
42a74f20 | 14 | #include <linux/mount.h> |
748de673 | 15 | #include <linux/file.h> |
9b7365fc | 16 | #include <linux/quotaops.h> |
8da4b8c4 | 17 | #include <linux/uuid.h> |
7c0f6ba6 | 18 | #include <linux/uaccess.h> |
783d9485 | 19 | #include <linux/delay.h> |
3dcf5451 CH |
20 | #include "ext4_jbd2.h" |
21 | #include "ext4.h" | |
0c9ec4be DW |
22 | #include <linux/fsmap.h> |
23 | #include "fsmap.h" | |
24 | #include <trace/events/ext4.h> | |
ac27a0ec | 25 | |
393d1d1d DTB |
26 | /** |
27 | * Swap memory between @a and @b for @len bytes. | |
28 | * | |
29 | * @a: pointer to first memory area | |
30 | * @b: pointer to second memory area | |
31 | * @len: number of bytes to swap | |
32 | * | |
33 | */ | |
34 | static void memswap(void *a, void *b, size_t len) | |
35 | { | |
36 | unsigned char *ap, *bp; | |
393d1d1d DTB |
37 | |
38 | ap = (unsigned char *)a; | |
39 | bp = (unsigned char *)b; | |
40 | while (len-- > 0) { | |
4b7e2db5 | 41 | swap(*ap, *bp); |
393d1d1d DTB |
42 | ap++; |
43 | bp++; | |
44 | } | |
45 | } | |
46 | ||
47 | /** | |
48 | * Swap i_data and associated attributes between @inode1 and @inode2. | |
49 | * This function is used for the primary swap between inode1 and inode2 | |
50 | * and also to revert this primary swap in case of errors. | |
51 | * | |
52 | * Therefore you have to make sure, that calling this method twice | |
53 | * will revert all changes. | |
54 | * | |
55 | * @inode1: pointer to first inode | |
56 | * @inode2: pointer to second inode | |
57 | */ | |
58 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
59 | { | |
60 | loff_t isize; | |
61 | struct ext4_inode_info *ei1; | |
62 | struct ext4_inode_info *ei2; | |
63 | ||
64 | ei1 = EXT4_I(inode1); | |
65 | ei2 = EXT4_I(inode2); | |
66 | ||
9c5d58fb JL |
67 | swap(inode1->i_flags, inode2->i_flags); |
68 | swap(inode1->i_version, inode2->i_version); | |
69 | swap(inode1->i_blocks, inode2->i_blocks); | |
70 | swap(inode1->i_bytes, inode2->i_bytes); | |
71 | swap(inode1->i_atime, inode2->i_atime); | |
72 | swap(inode1->i_mtime, inode2->i_mtime); | |
393d1d1d DTB |
73 | |
74 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
9c5d58fb JL |
75 | swap(ei1->i_flags, ei2->i_flags); |
76 | swap(ei1->i_disksize, ei2->i_disksize); | |
cde2d7a7 TT |
77 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
78 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
79 | |
80 | isize = i_size_read(inode1); | |
81 | i_size_write(inode1, i_size_read(inode2)); | |
82 | i_size_write(inode2, isize); | |
83 | } | |
84 | ||
85 | /** | |
86 | * Swap the information from the given @inode and the inode | |
87 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
88 | * important fields of the inodes. | |
89 | * | |
90 | * @sb: the super block of the filesystem | |
91 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO | |
92 | * | |
93 | */ | |
94 | static long swap_inode_boot_loader(struct super_block *sb, | |
95 | struct inode *inode) | |
96 | { | |
97 | handle_t *handle; | |
98 | int err; | |
99 | struct inode *inode_bl; | |
393d1d1d | 100 | struct ext4_inode_info *ei_bl; |
d7092ae2 | 101 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
393d1d1d | 102 | |
d8558a29 TT |
103 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
104 | return -EINVAL; | |
393d1d1d | 105 | |
d8558a29 TT |
106 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
107 | return -EPERM; | |
393d1d1d | 108 | |
393d1d1d | 109 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
d8558a29 TT |
110 | if (IS_ERR(inode_bl)) |
111 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
112 | ei_bl = EXT4_I(inode_bl); |
113 | ||
114 | filemap_flush(inode->i_mapping); | |
115 | filemap_flush(inode_bl->i_mapping); | |
116 | ||
117 | /* Protect orig inodes against a truncate and make sure, | |
118 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 119 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d DTB |
120 | |
121 | truncate_inode_pages(&inode->i_data, 0); | |
122 | truncate_inode_pages(&inode_bl->i_data, 0); | |
123 | ||
124 | /* Wait for all existing dio workers */ | |
125 | ext4_inode_block_unlocked_dio(inode); | |
126 | ext4_inode_block_unlocked_dio(inode_bl); | |
127 | inode_dio_wait(inode); | |
128 | inode_dio_wait(inode_bl); | |
129 | ||
130 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); | |
131 | if (IS_ERR(handle)) { | |
132 | err = -EINVAL; | |
30d29b11 | 133 | goto journal_err_out; |
393d1d1d DTB |
134 | } |
135 | ||
136 | /* Protect extent tree against block allocations via delalloc */ | |
137 | ext4_double_down_write_data_sem(inode, inode_bl); | |
138 | ||
139 | if (inode_bl->i_nlink == 0) { | |
140 | /* this inode has never been used as a BOOT_LOADER */ | |
141 | set_nlink(inode_bl, 1); | |
142 | i_uid_write(inode_bl, 0); | |
143 | i_gid_write(inode_bl, 0); | |
144 | inode_bl->i_flags = 0; | |
145 | ei_bl->i_flags = 0; | |
146 | inode_bl->i_version = 1; | |
147 | i_size_write(inode_bl, 0); | |
148 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 149 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
150 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
151 | ext4_ext_tree_init(handle, inode_bl); | |
152 | } else | |
153 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
154 | } | |
155 | ||
156 | swap_inode_data(inode, inode_bl); | |
157 | ||
eeca7ea1 | 158 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d DTB |
159 | |
160 | spin_lock(&sbi->s_next_gen_lock); | |
161 | inode->i_generation = sbi->s_next_generation++; | |
162 | inode_bl->i_generation = sbi->s_next_generation++; | |
163 | spin_unlock(&sbi->s_next_gen_lock); | |
164 | ||
165 | ext4_discard_preallocations(inode); | |
166 | ||
167 | err = ext4_mark_inode_dirty(handle, inode); | |
168 | if (err < 0) { | |
169 | ext4_warning(inode->i_sb, | |
170 | "couldn't mark inode #%lu dirty (err %d)", | |
171 | inode->i_ino, err); | |
172 | /* Revert all changes: */ | |
173 | swap_inode_data(inode, inode_bl); | |
174 | } else { | |
175 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
176 | if (err < 0) { | |
177 | ext4_warning(inode_bl->i_sb, | |
178 | "couldn't mark inode #%lu dirty (err %d)", | |
179 | inode_bl->i_ino, err); | |
180 | /* Revert all changes: */ | |
181 | swap_inode_data(inode, inode_bl); | |
182 | ext4_mark_inode_dirty(handle, inode); | |
183 | } | |
184 | } | |
393d1d1d | 185 | ext4_journal_stop(handle); |
393d1d1d DTB |
186 | ext4_double_up_write_data_sem(inode, inode_bl); |
187 | ||
30d29b11 | 188 | journal_err_out: |
393d1d1d DTB |
189 | ext4_inode_resume_unlocked_dio(inode); |
190 | ext4_inode_resume_unlocked_dio(inode_bl); | |
375e289e | 191 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 192 | iput(inode_bl); |
393d1d1d DTB |
193 | return err; |
194 | } | |
195 | ||
ba679017 | 196 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
197 | static int uuid_is_zero(__u8 u[16]) |
198 | { | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < 16; i++) | |
202 | if (u[i]) | |
203 | return 0; | |
204 | return 1; | |
205 | } | |
ba679017 | 206 | #endif |
9bd8212f | 207 | |
9b7365fc LX |
208 | static int ext4_ioctl_setflags(struct inode *inode, |
209 | unsigned int flags) | |
210 | { | |
211 | struct ext4_inode_info *ei = EXT4_I(inode); | |
212 | handle_t *handle = NULL; | |
fdde368e | 213 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
214 | struct ext4_iloc iloc; |
215 | unsigned int oldflags, mask, i; | |
216 | unsigned int jflag; | |
217 | ||
218 | /* Is it quota file? Do not allow user to mess with it */ | |
02749a4c | 219 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
220 | goto flags_out; |
221 | ||
222 | oldflags = ei->i_flags; | |
223 | ||
224 | /* The JOURNAL_DATA flag is modifiable only by root */ | |
225 | jflag = flags & EXT4_JOURNAL_DATA_FL; | |
226 | ||
227 | /* | |
228 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
229 | * the relevant capability. | |
230 | * | |
231 | * This test looks nicer. Thanks to Pauline Middelink | |
232 | */ | |
233 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { | |
234 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
235 | goto flags_out; | |
236 | } | |
237 | ||
238 | /* | |
239 | * The JOURNAL_DATA flag can only be changed by | |
240 | * the relevant capability. | |
241 | */ | |
242 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { | |
afdbd4a6 | 243 | if (!ns_capable(inode->i_sb->s_user_ns, CAP_SYS_RESOURCE)) |
9b7365fc LX |
244 | goto flags_out; |
245 | } | |
246 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) | |
247 | migrate = 1; | |
248 | ||
249 | if (flags & EXT4_EOFBLOCKS_FL) { | |
250 | /* we don't support adding EOFBLOCKS flag */ | |
251 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { | |
252 | err = -EOPNOTSUPP; | |
253 | goto flags_out; | |
254 | } | |
2c98eb5e TT |
255 | } else if (oldflags & EXT4_EOFBLOCKS_FL) { |
256 | err = ext4_truncate(inode); | |
257 | if (err) | |
258 | goto flags_out; | |
259 | } | |
9b7365fc LX |
260 | |
261 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
262 | if (IS_ERR(handle)) { | |
263 | err = PTR_ERR(handle); | |
264 | goto flags_out; | |
265 | } | |
266 | if (IS_SYNC(inode)) | |
267 | ext4_handle_sync(handle); | |
268 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
269 | if (err) | |
270 | goto flags_err; | |
271 | ||
272 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { | |
273 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
274 | continue; | |
f8011d93 JK |
275 | /* These flags get special treatment later */ |
276 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
277 | continue; | |
9b7365fc LX |
278 | if (mask & flags) |
279 | ext4_set_inode_flag(inode, i); | |
280 | else | |
281 | ext4_clear_inode_flag(inode, i); | |
282 | } | |
283 | ||
284 | ext4_set_inode_flags(inode); | |
eeca7ea1 | 285 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
286 | |
287 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
288 | flags_err: | |
289 | ext4_journal_stop(handle); | |
290 | if (err) | |
291 | goto flags_out; | |
292 | ||
293 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) | |
294 | err = ext4_change_inode_journal_flag(inode, jflag); | |
295 | if (err) | |
296 | goto flags_out; | |
297 | if (migrate) { | |
298 | if (flags & EXT4_EXTENTS_FL) | |
299 | err = ext4_ext_migrate(inode); | |
300 | else | |
301 | err = ext4_ind_migrate(inode); | |
302 | } | |
303 | ||
304 | flags_out: | |
305 | return err; | |
306 | } | |
307 | ||
308 | #ifdef CONFIG_QUOTA | |
309 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
310 | { | |
311 | struct inode *inode = file_inode(filp); | |
312 | struct super_block *sb = inode->i_sb; | |
313 | struct ext4_inode_info *ei = EXT4_I(inode); | |
314 | int err, rc; | |
315 | handle_t *handle; | |
316 | kprojid_t kprojid; | |
317 | struct ext4_iloc iloc; | |
318 | struct ext4_inode *raw_inode; | |
079788d0 | 319 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 320 | |
0b7b7779 | 321 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
322 | if (projid != EXT4_DEF_PROJID) |
323 | return -EOPNOTSUPP; | |
324 | else | |
325 | return 0; | |
326 | } | |
327 | ||
328 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
329 | return -EOPNOTSUPP; | |
330 | ||
afdbd4a6 | 331 | kprojid = make_kprojid(sb->s_user_ns, (projid_t)projid); |
9b7365fc | 332 | |
afdbd4a6 SF |
333 | if (!projid_valid(kprojid)) |
334 | return -EOVERFLOW; | |
9b7365fc LX |
335 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) |
336 | return 0; | |
337 | ||
338 | err = mnt_want_write_file(filp); | |
339 | if (err) | |
340 | return err; | |
341 | ||
342 | err = -EPERM; | |
5955102c | 343 | inode_lock(inode); |
9b7365fc | 344 | /* Is it quota file? Do not allow user to mess with it */ |
02749a4c | 345 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
346 | goto out_unlock; |
347 | ||
348 | err = ext4_get_inode_loc(inode, &iloc); | |
349 | if (err) | |
350 | goto out_unlock; | |
351 | ||
352 | raw_inode = ext4_raw_inode(&iloc); | |
353 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
c03b45b8 MX |
354 | err = ext4_expand_extra_isize(inode, |
355 | EXT4_SB(sb)->s_want_extra_isize, | |
356 | &iloc); | |
357 | if (err) | |
358 | goto out_unlock; | |
359 | } else { | |
9b7365fc | 360 | brelse(iloc.bh); |
9b7365fc | 361 | } |
9b7365fc LX |
362 | |
363 | dquot_initialize(inode); | |
364 | ||
365 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
366 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
367 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
368 | if (IS_ERR(handle)) { | |
369 | err = PTR_ERR(handle); | |
370 | goto out_unlock; | |
371 | } | |
372 | ||
373 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
374 | if (err) | |
375 | goto out_stop; | |
376 | ||
079788d0 WS |
377 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
378 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
7a9ca53a TE |
379 | |
380 | /* __dquot_transfer() calls back ext4_get_inode_usage() which | |
381 | * counts xattr inode references. | |
382 | */ | |
383 | down_read(&EXT4_I(inode)->xattr_sem); | |
079788d0 | 384 | err = __dquot_transfer(inode, transfer_to); |
7a9ca53a | 385 | up_read(&EXT4_I(inode)->xattr_sem); |
079788d0 WS |
386 | dqput(transfer_to[PRJQUOTA]); |
387 | if (err) | |
388 | goto out_dirty; | |
9b7365fc | 389 | } |
079788d0 | 390 | |
9b7365fc | 391 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 392 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
393 | out_dirty: |
394 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
395 | if (!err) | |
396 | err = rc; | |
397 | out_stop: | |
398 | ext4_journal_stop(handle); | |
399 | out_unlock: | |
5955102c | 400 | inode_unlock(inode); |
9b7365fc LX |
401 | mnt_drop_write_file(filp); |
402 | return err; | |
403 | } | |
404 | #else | |
405 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) | |
406 | { | |
407 | if (projid != EXT4_DEF_PROJID) | |
408 | return -EOPNOTSUPP; | |
409 | return 0; | |
410 | } | |
411 | #endif | |
412 | ||
413 | /* Transfer internal flags to xflags */ | |
414 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) | |
415 | { | |
416 | __u32 xflags = 0; | |
417 | ||
418 | if (iflags & EXT4_SYNC_FL) | |
419 | xflags |= FS_XFLAG_SYNC; | |
420 | if (iflags & EXT4_IMMUTABLE_FL) | |
421 | xflags |= FS_XFLAG_IMMUTABLE; | |
422 | if (iflags & EXT4_APPEND_FL) | |
423 | xflags |= FS_XFLAG_APPEND; | |
424 | if (iflags & EXT4_NODUMP_FL) | |
425 | xflags |= FS_XFLAG_NODUMP; | |
426 | if (iflags & EXT4_NOATIME_FL) | |
427 | xflags |= FS_XFLAG_NOATIME; | |
428 | if (iflags & EXT4_PROJINHERIT_FL) | |
429 | xflags |= FS_XFLAG_PROJINHERIT; | |
430 | return xflags; | |
431 | } | |
432 | ||
d14e7683 JK |
433 | #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ |
434 | FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ | |
435 | FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) | |
436 | ||
9b7365fc LX |
437 | /* Transfer xflags flags to internal */ |
438 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) | |
439 | { | |
440 | unsigned long iflags = 0; | |
441 | ||
442 | if (xflags & FS_XFLAG_SYNC) | |
443 | iflags |= EXT4_SYNC_FL; | |
444 | if (xflags & FS_XFLAG_IMMUTABLE) | |
445 | iflags |= EXT4_IMMUTABLE_FL; | |
446 | if (xflags & FS_XFLAG_APPEND) | |
447 | iflags |= EXT4_APPEND_FL; | |
448 | if (xflags & FS_XFLAG_NODUMP) | |
449 | iflags |= EXT4_NODUMP_FL; | |
450 | if (xflags & FS_XFLAG_NOATIME) | |
451 | iflags |= EXT4_NOATIME_FL; | |
452 | if (xflags & FS_XFLAG_PROJINHERIT) | |
453 | iflags |= EXT4_PROJINHERIT_FL; | |
454 | ||
455 | return iflags; | |
456 | } | |
457 | ||
1a20a630 | 458 | static int ext4_shutdown(struct super_block *sb, unsigned long arg) |
783d9485 TT |
459 | { |
460 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
461 | __u32 flags; | |
462 | ||
463 | if (!capable(CAP_SYS_ADMIN)) | |
464 | return -EPERM; | |
465 | ||
466 | if (get_user(flags, (__u32 __user *)arg)) | |
467 | return -EFAULT; | |
468 | ||
469 | if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) | |
470 | return -EINVAL; | |
471 | ||
472 | if (ext4_forced_shutdown(sbi)) | |
473 | return 0; | |
474 | ||
475 | ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); | |
476 | ||
477 | switch (flags) { | |
478 | case EXT4_GOING_FLAGS_DEFAULT: | |
479 | freeze_bdev(sb->s_bdev); | |
480 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
481 | thaw_bdev(sb->s_bdev, sb); | |
482 | break; | |
483 | case EXT4_GOING_FLAGS_LOGFLUSH: | |
484 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
485 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
486 | (void) ext4_force_commit(sb); | |
487 | jbd2_journal_abort(sbi->s_journal, 0); | |
488 | } | |
489 | break; | |
490 | case EXT4_GOING_FLAGS_NOLOGFLUSH: | |
491 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
492 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
493 | msleep(100); | |
494 | jbd2_journal_abort(sbi->s_journal, 0); | |
495 | } | |
496 | break; | |
497 | default: | |
498 | return -EINVAL; | |
499 | } | |
500 | clear_opt(sb, DISCARD); | |
501 | return 0; | |
502 | } | |
503 | ||
0c9ec4be DW |
504 | struct getfsmap_info { |
505 | struct super_block *gi_sb; | |
506 | struct fsmap_head __user *gi_data; | |
507 | unsigned int gi_idx; | |
508 | __u32 gi_last_flags; | |
509 | }; | |
510 | ||
511 | static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) | |
512 | { | |
513 | struct getfsmap_info *info = priv; | |
514 | struct fsmap fm; | |
515 | ||
516 | trace_ext4_getfsmap_mapping(info->gi_sb, xfm); | |
517 | ||
518 | info->gi_last_flags = xfm->fmr_flags; | |
519 | ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); | |
520 | if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, | |
521 | sizeof(struct fsmap))) | |
522 | return -EFAULT; | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | static int ext4_ioc_getfsmap(struct super_block *sb, | |
528 | struct fsmap_head __user *arg) | |
529 | { | |
530 | struct getfsmap_info info = {0}; | |
531 | struct ext4_fsmap_head xhead = {0}; | |
532 | struct fsmap_head head; | |
533 | bool aborted = false; | |
534 | int error; | |
535 | ||
536 | if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) | |
537 | return -EFAULT; | |
538 | if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || | |
539 | memchr_inv(head.fmh_keys[0].fmr_reserved, 0, | |
540 | sizeof(head.fmh_keys[0].fmr_reserved)) || | |
541 | memchr_inv(head.fmh_keys[1].fmr_reserved, 0, | |
542 | sizeof(head.fmh_keys[1].fmr_reserved))) | |
543 | return -EINVAL; | |
544 | /* | |
545 | * ext4 doesn't report file extents at all, so the only valid | |
546 | * file offsets are the magic ones (all zeroes or all ones). | |
547 | */ | |
548 | if (head.fmh_keys[0].fmr_offset || | |
549 | (head.fmh_keys[1].fmr_offset != 0 && | |
550 | head.fmh_keys[1].fmr_offset != -1ULL)) | |
551 | return -EINVAL; | |
552 | ||
553 | xhead.fmh_iflags = head.fmh_iflags; | |
554 | xhead.fmh_count = head.fmh_count; | |
555 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); | |
556 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); | |
557 | ||
558 | trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); | |
559 | trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); | |
560 | ||
561 | info.gi_sb = sb; | |
562 | info.gi_data = arg; | |
563 | error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); | |
564 | if (error == EXT4_QUERY_RANGE_ABORT) { | |
565 | error = 0; | |
566 | aborted = true; | |
567 | } else if (error) | |
568 | return error; | |
569 | ||
570 | /* If we didn't abort, set the "last" flag in the last fmx */ | |
571 | if (!aborted && info.gi_idx) { | |
572 | info.gi_last_flags |= FMR_OF_LAST; | |
573 | if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, | |
574 | &info.gi_last_flags, | |
575 | sizeof(info.gi_last_flags))) | |
576 | return -EFAULT; | |
577 | } | |
578 | ||
579 | /* copy back header */ | |
580 | head.fmh_entries = xhead.fmh_entries; | |
581 | head.fmh_oflags = xhead.fmh_oflags; | |
582 | if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) | |
583 | return -EFAULT; | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
5cdd7b2d | 588 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 589 | { |
496ad9aa | 590 | struct inode *inode = file_inode(filp); |
bab08ab9 | 591 | struct super_block *sb = inode->i_sb; |
617ba13b | 592 | struct ext4_inode_info *ei = EXT4_I(inode); |
ac27a0ec | 593 | unsigned int flags; |
ac27a0ec | 594 | |
af5bc92d | 595 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
596 | |
597 | switch (cmd) { | |
0c9ec4be DW |
598 | case FS_IOC_GETFSMAP: |
599 | return ext4_ioc_getfsmap(sb, (void __user *)arg); | |
617ba13b MC |
600 | case EXT4_IOC_GETFLAGS: |
601 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; | |
ac27a0ec | 602 | return put_user(flags, (int __user *) arg); |
617ba13b | 603 | case EXT4_IOC_SETFLAGS: { |
9b7365fc | 604 | int err; |
ac27a0ec | 605 | |
2e149670 | 606 | if (!inode_owner_or_capable(inode)) |
ac27a0ec DK |
607 | return -EACCES; |
608 | ||
609 | if (get_user(flags, (int __user *) arg)) | |
610 | return -EFAULT; | |
611 | ||
d14e7683 JK |
612 | if (flags & ~EXT4_FL_USER_VISIBLE) |
613 | return -EOPNOTSUPP; | |
614 | /* | |
615 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
616 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
617 | * more restrictive than just silently masking off visible but | |
618 | * not settable flags as we always did. | |
619 | */ | |
620 | flags &= EXT4_FL_USER_MODIFIABLE; | |
621 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
622 | return -EOPNOTSUPP; | |
623 | ||
a561be71 | 624 | err = mnt_want_write_file(filp); |
42a74f20 DH |
625 | if (err) |
626 | return err; | |
627 | ||
5955102c | 628 | inode_lock(inode); |
9b7365fc | 629 | err = ext4_ioctl_setflags(inode, flags); |
5955102c | 630 | inode_unlock(inode); |
2a79f17e | 631 | mnt_drop_write_file(filp); |
ac27a0ec DK |
632 | return err; |
633 | } | |
617ba13b MC |
634 | case EXT4_IOC_GETVERSION: |
635 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 636 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
637 | case EXT4_IOC_SETVERSION: |
638 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 639 | handle_t *handle; |
617ba13b | 640 | struct ext4_iloc iloc; |
ac27a0ec DK |
641 | __u32 generation; |
642 | int err; | |
643 | ||
2e149670 | 644 | if (!inode_owner_or_capable(inode)) |
ac27a0ec | 645 | return -EPERM; |
42a74f20 | 646 | |
9aa5d32b | 647 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
648 | ext4_warning(sb, "Setting inode version is not " |
649 | "supported with metadata_csum enabled."); | |
650 | return -ENOTTY; | |
651 | } | |
652 | ||
a561be71 | 653 | err = mnt_want_write_file(filp); |
42a74f20 DH |
654 | if (err) |
655 | return err; | |
656 | if (get_user(generation, (int __user *) arg)) { | |
657 | err = -EFAULT; | |
658 | goto setversion_out; | |
659 | } | |
ac27a0ec | 660 | |
5955102c | 661 | inode_lock(inode); |
9924a92a | 662 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
663 | if (IS_ERR(handle)) { |
664 | err = PTR_ERR(handle); | |
6c2155b9 | 665 | goto unlock_out; |
42a74f20 | 666 | } |
617ba13b | 667 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 668 | if (err == 0) { |
eeca7ea1 | 669 | inode->i_ctime = current_time(inode); |
ac27a0ec | 670 | inode->i_generation = generation; |
617ba13b | 671 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 672 | } |
617ba13b | 673 | ext4_journal_stop(handle); |
6c2155b9 DH |
674 | |
675 | unlock_out: | |
5955102c | 676 | inode_unlock(inode); |
42a74f20 | 677 | setversion_out: |
2a79f17e | 678 | mnt_drop_write_file(filp); |
ac27a0ec DK |
679 | return err; |
680 | } | |
617ba13b MC |
681 | case EXT4_IOC_GROUP_EXTEND: { |
682 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 683 | int err, err2=0; |
ac27a0ec | 684 | |
8f82f840 YY |
685 | err = ext4_resize_begin(sb); |
686 | if (err) | |
687 | return err; | |
ac27a0ec | 688 | |
014a1770 DH |
689 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
690 | err = -EFAULT; | |
691 | goto group_extend_out; | |
692 | } | |
ac27a0ec | 693 | |
e2b911c5 | 694 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
695 | ext4_msg(sb, KERN_ERR, |
696 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
697 | err = -EOPNOTSUPP; |
698 | goto group_extend_out; | |
bab08ab9 TT |
699 | } |
700 | ||
a561be71 | 701 | err = mnt_want_write_file(filp); |
42a74f20 | 702 | if (err) |
014a1770 | 703 | goto group_extend_out; |
42a74f20 | 704 | |
617ba13b | 705 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
706 | if (EXT4_SB(sb)->s_journal) { |
707 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
708 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
709 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
710 | } | |
7ffe1ea8 HK |
711 | if (err == 0) |
712 | err = err2; | |
2a79f17e | 713 | mnt_drop_write_file(filp); |
014a1770 | 714 | group_extend_out: |
8f82f840 | 715 | ext4_resize_end(sb); |
ac27a0ec DK |
716 | return err; |
717 | } | |
748de673 AF |
718 | |
719 | case EXT4_IOC_MOVE_EXT: { | |
720 | struct move_extent me; | |
2903ff01 AV |
721 | struct fd donor; |
722 | int err; | |
748de673 | 723 | |
4a58579b AF |
724 | if (!(filp->f_mode & FMODE_READ) || |
725 | !(filp->f_mode & FMODE_WRITE)) | |
726 | return -EBADF; | |
727 | ||
748de673 AF |
728 | if (copy_from_user(&me, |
729 | (struct move_extent __user *)arg, sizeof(me))) | |
730 | return -EFAULT; | |
4a58579b | 731 | me.moved_len = 0; |
748de673 | 732 | |
2903ff01 AV |
733 | donor = fdget(me.donor_fd); |
734 | if (!donor.file) | |
748de673 AF |
735 | return -EBADF; |
736 | ||
2903ff01 | 737 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
738 | err = -EBADF; |
739 | goto mext_out; | |
748de673 AF |
740 | } |
741 | ||
e2b911c5 | 742 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
743 | ext4_msg(sb, KERN_ERR, |
744 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
745 | err = -EOPNOTSUPP; |
746 | goto mext_out; | |
73f34a5e RZ |
747 | } else if (IS_DAX(inode)) { |
748 | ext4_msg(sb, KERN_ERR, | |
749 | "Online defrag not supported with DAX"); | |
750 | err = -EOPNOTSUPP; | |
751 | goto mext_out; | |
bab08ab9 TT |
752 | } |
753 | ||
a561be71 | 754 | err = mnt_want_write_file(filp); |
4a58579b AF |
755 | if (err) |
756 | goto mext_out; | |
757 | ||
2903ff01 | 758 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 759 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 760 | mnt_drop_write_file(filp); |
748de673 | 761 | |
60e6679e | 762 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 763 | &me, sizeof(me))) |
4a58579b AF |
764 | err = -EFAULT; |
765 | mext_out: | |
2903ff01 | 766 | fdput(donor); |
748de673 AF |
767 | return err; |
768 | } | |
769 | ||
617ba13b MC |
770 | case EXT4_IOC_GROUP_ADD: { |
771 | struct ext4_new_group_data input; | |
ac046f1d | 772 | int err, err2=0; |
ac27a0ec | 773 | |
8f82f840 YY |
774 | err = ext4_resize_begin(sb); |
775 | if (err) | |
776 | return err; | |
ac27a0ec | 777 | |
617ba13b | 778 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
014a1770 DH |
779 | sizeof(input))) { |
780 | err = -EFAULT; | |
781 | goto group_add_out; | |
782 | } | |
ac27a0ec | 783 | |
e2b911c5 | 784 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
785 | ext4_msg(sb, KERN_ERR, |
786 | "Online resizing not supported with bigalloc"); | |
014a1770 DH |
787 | err = -EOPNOTSUPP; |
788 | goto group_add_out; | |
bab08ab9 TT |
789 | } |
790 | ||
a561be71 | 791 | err = mnt_want_write_file(filp); |
42a74f20 | 792 | if (err) |
014a1770 | 793 | goto group_add_out; |
42a74f20 | 794 | |
617ba13b | 795 | err = ext4_group_add(sb, &input); |
ac046f1d PT |
796 | if (EXT4_SB(sb)->s_journal) { |
797 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
798 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
799 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
800 | } | |
7ffe1ea8 HK |
801 | if (err == 0) |
802 | err = err2; | |
2a79f17e | 803 | mnt_drop_write_file(filp); |
7f511862 TT |
804 | if (!err && ext4_has_group_desc_csum(sb) && |
805 | test_opt(sb, INIT_INODE_TABLE)) | |
806 | err = ext4_register_li_request(sb, input.group); | |
014a1770 | 807 | group_add_out: |
8f82f840 | 808 | ext4_resize_end(sb); |
ac27a0ec DK |
809 | return err; |
810 | } | |
811 | ||
c14c6fd5 | 812 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
813 | { |
814 | int err; | |
2e149670 | 815 | if (!inode_owner_or_capable(inode)) |
2a43a878 AK |
816 | return -EACCES; |
817 | ||
a561be71 | 818 | err = mnt_want_write_file(filp); |
2a43a878 AK |
819 | if (err) |
820 | return err; | |
821 | /* | |
822 | * inode_mutex prevent write and truncate on the file. | |
823 | * Read still goes through. We take i_data_sem in | |
824 | * ext4_ext_swap_inode_data before we switch the | |
825 | * inode format to prevent read. | |
826 | */ | |
5955102c | 827 | inode_lock((inode)); |
2a43a878 | 828 | err = ext4_ext_migrate(inode); |
5955102c | 829 | inode_unlock((inode)); |
2a79f17e | 830 | mnt_drop_write_file(filp); |
2a43a878 AK |
831 | return err; |
832 | } | |
c14c6fd5 | 833 | |
ccd2506b TT |
834 | case EXT4_IOC_ALLOC_DA_BLKS: |
835 | { | |
836 | int err; | |
2e149670 | 837 | if (!inode_owner_or_capable(inode)) |
ccd2506b TT |
838 | return -EACCES; |
839 | ||
a561be71 | 840 | err = mnt_want_write_file(filp); |
ccd2506b TT |
841 | if (err) |
842 | return err; | |
843 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 844 | mnt_drop_write_file(filp); |
ccd2506b TT |
845 | return err; |
846 | } | |
847 | ||
393d1d1d | 848 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
849 | { |
850 | int err; | |
393d1d1d DTB |
851 | if (!(filp->f_mode & FMODE_WRITE)) |
852 | return -EBADF; | |
3e67cfad DM |
853 | err = mnt_want_write_file(filp); |
854 | if (err) | |
855 | return err; | |
856 | err = swap_inode_boot_loader(sb, inode); | |
857 | mnt_drop_write_file(filp); | |
858 | return err; | |
859 | } | |
393d1d1d | 860 | |
19c5246d YY |
861 | case EXT4_IOC_RESIZE_FS: { |
862 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 863 | int err = 0, err2 = 0; |
7f511862 | 864 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 865 | |
e2b911c5 | 866 | if (ext4_has_feature_bigalloc(sb)) { |
19c5246d YY |
867 | ext4_msg(sb, KERN_ERR, |
868 | "Online resizing not (yet) supported with bigalloc"); | |
869 | return -EOPNOTSUPP; | |
870 | } | |
871 | ||
19c5246d YY |
872 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
873 | sizeof(__u64))) { | |
874 | return -EFAULT; | |
875 | } | |
876 | ||
19c5246d YY |
877 | err = ext4_resize_begin(sb); |
878 | if (err) | |
879 | return err; | |
880 | ||
8cae6f71 | 881 | err = mnt_want_write_file(filp); |
19c5246d YY |
882 | if (err) |
883 | goto resizefs_out; | |
884 | ||
885 | err = ext4_resize_fs(sb, n_blocks_count); | |
886 | if (EXT4_SB(sb)->s_journal) { | |
887 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
888 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); | |
889 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
890 | } | |
891 | if (err == 0) | |
892 | err = err2; | |
8cae6f71 | 893 | mnt_drop_write_file(filp); |
7f511862 TT |
894 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
895 | ext4_has_group_desc_csum(sb) && | |
896 | test_opt(sb, INIT_INODE_TABLE)) | |
897 | err = ext4_register_li_request(sb, o_group); | |
898 | ||
19c5246d YY |
899 | resizefs_out: |
900 | ext4_resize_end(sb); | |
901 | return err; | |
902 | } | |
903 | ||
e681c047 LC |
904 | case FITRIM: |
905 | { | |
41431792 | 906 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
e681c047 LC |
907 | struct fstrim_range range; |
908 | int ret = 0; | |
909 | ||
afdbd4a6 | 910 | if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) |
e681c047 LC |
911 | return -EPERM; |
912 | ||
41431792 LC |
913 | if (!blk_queue_discard(q)) |
914 | return -EOPNOTSUPP; | |
915 | ||
e6705f7c | 916 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
917 | sizeof(range))) |
918 | return -EFAULT; | |
919 | ||
5c2ed62f LC |
920 | range.minlen = max((unsigned int)range.minlen, |
921 | q->limits.discard_granularity); | |
e681c047 LC |
922 | ret = ext4_trim_fs(sb, &range); |
923 | if (ret < 0) | |
924 | return ret; | |
925 | ||
e6705f7c | 926 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
927 | sizeof(range))) |
928 | return -EFAULT; | |
929 | ||
930 | return 0; | |
931 | } | |
7869a4a6 TT |
932 | case EXT4_IOC_PRECACHE_EXTENTS: |
933 | return ext4_ext_precache(inode); | |
9bd8212f | 934 | |
db717d8e | 935 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
936 | if (!ext4_has_feature_encrypt(sb)) |
937 | return -EOPNOTSUPP; | |
db717d8e | 938 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 939 | |
9bd8212f | 940 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
ba679017 | 941 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
9bd8212f MH |
942 | int err, err2; |
943 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
944 | handle_t *handle; | |
945 | ||
35997d1c | 946 | if (!ext4_has_feature_encrypt(sb)) |
9bd8212f MH |
947 | return -EOPNOTSUPP; |
948 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { | |
949 | err = mnt_want_write_file(filp); | |
950 | if (err) | |
951 | return err; | |
952 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); | |
953 | if (IS_ERR(handle)) { | |
954 | err = PTR_ERR(handle); | |
955 | goto pwsalt_err_exit; | |
956 | } | |
957 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); | |
958 | if (err) | |
959 | goto pwsalt_err_journal; | |
960 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); | |
961 | err = ext4_handle_dirty_metadata(handle, NULL, | |
962 | sbi->s_sbh); | |
963 | pwsalt_err_journal: | |
964 | err2 = ext4_journal_stop(handle); | |
965 | if (err2 && !err) | |
966 | err = err2; | |
967 | pwsalt_err_exit: | |
968 | mnt_drop_write_file(filp); | |
969 | if (err) | |
970 | return err; | |
971 | } | |
b4ab9e29 FF |
972 | if (copy_to_user((void __user *) arg, |
973 | sbi->s_es->s_encrypt_pw_salt, 16)) | |
9bd8212f MH |
974 | return -EFAULT; |
975 | return 0; | |
ba679017 EB |
976 | #else |
977 | return -EOPNOTSUPP; | |
978 | #endif | |
9bd8212f | 979 | } |
db717d8e EB |
980 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
981 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); | |
9bd8212f | 982 | |
9b7365fc LX |
983 | case EXT4_IOC_FSGETXATTR: |
984 | { | |
985 | struct fsxattr fa; | |
986 | ||
987 | memset(&fa, 0, sizeof(struct fsxattr)); | |
9b7365fc LX |
988 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); |
989 | ||
0b7b7779 | 990 | if (ext4_has_feature_project(inode->i_sb)) { |
afdbd4a6 | 991 | fa.fsx_projid = (__u32)from_kprojid_munged(sb->s_user_ns, |
9b7365fc LX |
992 | EXT4_I(inode)->i_projid); |
993 | } | |
994 | ||
995 | if (copy_to_user((struct fsxattr __user *)arg, | |
996 | &fa, sizeof(fa))) | |
997 | return -EFAULT; | |
998 | return 0; | |
999 | } | |
1000 | case EXT4_IOC_FSSETXATTR: | |
1001 | { | |
1002 | struct fsxattr fa; | |
1003 | int err; | |
1004 | ||
1005 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, | |
1006 | sizeof(fa))) | |
1007 | return -EFAULT; | |
1008 | ||
1009 | /* Make sure caller has proper permission */ | |
1010 | if (!inode_owner_or_capable(inode)) | |
1011 | return -EACCES; | |
1012 | ||
d14e7683 JK |
1013 | if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) |
1014 | return -EOPNOTSUPP; | |
1015 | ||
1016 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); | |
1017 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
1018 | return -EOPNOTSUPP; | |
1019 | ||
9b7365fc LX |
1020 | err = mnt_want_write_file(filp); |
1021 | if (err) | |
1022 | return err; | |
1023 | ||
5955102c | 1024 | inode_lock(inode); |
9b7365fc LX |
1025 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
1026 | (flags & EXT4_FL_XFLAG_VISIBLE); | |
1027 | err = ext4_ioctl_setflags(inode, flags); | |
5955102c | 1028 | inode_unlock(inode); |
9b7365fc LX |
1029 | mnt_drop_write_file(filp); |
1030 | if (err) | |
1031 | return err; | |
1032 | ||
1033 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); | |
1034 | if (err) | |
1035 | return err; | |
1036 | ||
1037 | return 0; | |
1038 | } | |
e9be2ac7 TT |
1039 | case EXT4_IOC_SHUTDOWN: |
1040 | return ext4_shutdown(sb, arg); | |
ac27a0ec DK |
1041 | default: |
1042 | return -ENOTTY; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | #ifdef CONFIG_COMPAT | |
617ba13b | 1047 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1048 | { |
ac27a0ec DK |
1049 | /* These are just misnamed, they actually get/put from/to user an int */ |
1050 | switch (cmd) { | |
617ba13b MC |
1051 | case EXT4_IOC32_GETFLAGS: |
1052 | cmd = EXT4_IOC_GETFLAGS; | |
ac27a0ec | 1053 | break; |
617ba13b MC |
1054 | case EXT4_IOC32_SETFLAGS: |
1055 | cmd = EXT4_IOC_SETFLAGS; | |
ac27a0ec | 1056 | break; |
617ba13b MC |
1057 | case EXT4_IOC32_GETVERSION: |
1058 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 1059 | break; |
617ba13b MC |
1060 | case EXT4_IOC32_SETVERSION: |
1061 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 1062 | break; |
617ba13b MC |
1063 | case EXT4_IOC32_GROUP_EXTEND: |
1064 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 1065 | break; |
617ba13b MC |
1066 | case EXT4_IOC32_GETVERSION_OLD: |
1067 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 1068 | break; |
617ba13b MC |
1069 | case EXT4_IOC32_SETVERSION_OLD: |
1070 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 1071 | break; |
617ba13b MC |
1072 | case EXT4_IOC32_GETRSVSZ: |
1073 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 1074 | break; |
617ba13b MC |
1075 | case EXT4_IOC32_SETRSVSZ: |
1076 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 1077 | break; |
4d92dc0f BH |
1078 | case EXT4_IOC32_GROUP_ADD: { |
1079 | struct compat_ext4_new_group_input __user *uinput; | |
1080 | struct ext4_new_group_input input; | |
1081 | mm_segment_t old_fs; | |
1082 | int err; | |
1083 | ||
1084 | uinput = compat_ptr(arg); | |
1085 | err = get_user(input.group, &uinput->group); | |
1086 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
1087 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
1088 | err |= get_user(input.inode_table, &uinput->inode_table); | |
1089 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
1090 | err |= get_user(input.reserved_blocks, | |
1091 | &uinput->reserved_blocks); | |
1092 | if (err) | |
1093 | return -EFAULT; | |
1094 | old_fs = get_fs(); | |
1095 | set_fs(KERNEL_DS); | |
1096 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, | |
1097 | (unsigned long) &input); | |
1098 | set_fs(old_fs); | |
1099 | return err; | |
1100 | } | |
b684b2ee | 1101 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 1102 | case EXT4_IOC_RESIZE_FS: |
7869a4a6 | 1103 | case EXT4_IOC_PRECACHE_EXTENTS: |
9bd8212f MH |
1104 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
1105 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: | |
1106 | case EXT4_IOC_GET_ENCRYPTION_POLICY: | |
e9be2ac7 | 1107 | case EXT4_IOC_SHUTDOWN: |
0c9ec4be | 1108 | case FS_IOC_GETFSMAP: |
b684b2ee | 1109 | break; |
ac27a0ec DK |
1110 | default: |
1111 | return -ENOIOCTLCMD; | |
1112 | } | |
5cdd7b2d | 1113 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
1114 | } |
1115 | #endif |