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Commit | Line | Data |
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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> |
23253068 | 18 | #include <linux/random.h> |
7c0f6ba6 | 19 | #include <linux/uaccess.h> |
783d9485 | 20 | #include <linux/delay.h> |
ee73f9a5 | 21 | #include <linux/iversion.h> |
4db5c2e6 | 22 | #include <linux/fileattr.h> |
d95efb14 | 23 | #include <linux/uuid.h> |
3dcf5451 CH |
24 | #include "ext4_jbd2.h" |
25 | #include "ext4.h" | |
0c9ec4be DW |
26 | #include <linux/fsmap.h> |
27 | #include "fsmap.h" | |
28 | #include <trace/events/ext4.h> | |
ac27a0ec | 29 | |
bbc605cd LC |
30 | typedef void ext4_update_sb_callback(struct ext4_super_block *es, |
31 | const void *arg); | |
32 | ||
33 | /* | |
34 | * Superblock modification callback function for changing file system | |
35 | * label | |
36 | */ | |
37 | static void ext4_sb_setlabel(struct ext4_super_block *es, const void *arg) | |
38 | { | |
39 | /* Sanity check, this should never happen */ | |
40 | BUILD_BUG_ON(sizeof(es->s_volume_name) < EXT4_LABEL_MAX); | |
41 | ||
42 | memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX); | |
43 | } | |
44 | ||
d95efb14 JB |
45 | /* |
46 | * Superblock modification callback function for changing file system | |
47 | * UUID. | |
48 | */ | |
49 | static void ext4_sb_setuuid(struct ext4_super_block *es, const void *arg) | |
50 | { | |
51 | memcpy(es->s_uuid, (__u8 *)arg, UUID_SIZE); | |
52 | } | |
53 | ||
bbc605cd LC |
54 | static |
55 | int ext4_update_primary_sb(struct super_block *sb, handle_t *handle, | |
56 | ext4_update_sb_callback func, | |
57 | const void *arg) | |
58 | { | |
59 | int err = 0; | |
60 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
61 | struct buffer_head *bh = sbi->s_sbh; | |
62 | struct ext4_super_block *es = sbi->s_es; | |
63 | ||
64 | trace_ext4_update_sb(sb, bh->b_blocknr, 1); | |
65 | ||
66 | BUFFER_TRACE(bh, "get_write_access"); | |
67 | err = ext4_journal_get_write_access(handle, sb, | |
68 | bh, | |
69 | EXT4_JTR_NONE); | |
70 | if (err) | |
71 | goto out_err; | |
72 | ||
73 | lock_buffer(bh); | |
74 | func(es, arg); | |
75 | ext4_superblock_csum_set(sb); | |
76 | unlock_buffer(bh); | |
77 | ||
78 | if (buffer_write_io_error(bh) || !buffer_uptodate(bh)) { | |
79 | ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " | |
80 | "superblock detected"); | |
81 | clear_buffer_write_io_error(bh); | |
82 | set_buffer_uptodate(bh); | |
83 | } | |
84 | ||
85 | err = ext4_handle_dirty_metadata(handle, NULL, bh); | |
86 | if (err) | |
87 | goto out_err; | |
88 | err = sync_dirty_buffer(bh); | |
89 | out_err: | |
90 | ext4_std_error(sb, err); | |
91 | return err; | |
92 | } | |
93 | ||
94 | /* | |
95 | * Update one backup superblock in the group 'grp' using the callback | |
96 | * function 'func' and argument 'arg'. If the handle is NULL the | |
97 | * modification is not journalled. | |
98 | * | |
99 | * Returns: 0 when no modification was done (no superblock in the group) | |
100 | * 1 when the modification was successful | |
101 | * <0 on error | |
102 | */ | |
103 | static int ext4_update_backup_sb(struct super_block *sb, | |
104 | handle_t *handle, ext4_group_t grp, | |
105 | ext4_update_sb_callback func, const void *arg) | |
106 | { | |
107 | int err = 0; | |
108 | ext4_fsblk_t sb_block; | |
109 | struct buffer_head *bh; | |
110 | unsigned long offset = 0; | |
111 | struct ext4_super_block *es; | |
112 | ||
113 | if (!ext4_bg_has_super(sb, grp)) | |
114 | return 0; | |
115 | ||
116 | /* | |
117 | * For the group 0 there is always 1k padding, so we have | |
118 | * either adjust offset, or sb_block depending on blocksize | |
119 | */ | |
120 | if (grp == 0) { | |
121 | sb_block = 1 * EXT4_MIN_BLOCK_SIZE; | |
122 | offset = do_div(sb_block, sb->s_blocksize); | |
123 | } else { | |
124 | sb_block = ext4_group_first_block_no(sb, grp); | |
125 | offset = 0; | |
126 | } | |
127 | ||
128 | trace_ext4_update_sb(sb, sb_block, handle ? 1 : 0); | |
129 | ||
130 | bh = ext4_sb_bread(sb, sb_block, 0); | |
131 | if (IS_ERR(bh)) | |
132 | return PTR_ERR(bh); | |
133 | ||
134 | if (handle) { | |
135 | BUFFER_TRACE(bh, "get_write_access"); | |
136 | err = ext4_journal_get_write_access(handle, sb, | |
137 | bh, | |
138 | EXT4_JTR_NONE); | |
139 | if (err) | |
140 | goto out_bh; | |
141 | } | |
142 | ||
143 | es = (struct ext4_super_block *) (bh->b_data + offset); | |
144 | lock_buffer(bh); | |
145 | if (ext4_has_metadata_csum(sb) && | |
146 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
147 | ext4_msg(sb, KERN_ERR, "Invalid checksum for backup " | |
148 | "superblock %llu\n", sb_block); | |
149 | unlock_buffer(bh); | |
150 | err = -EFSBADCRC; | |
151 | goto out_bh; | |
152 | } | |
153 | func(es, arg); | |
154 | if (ext4_has_metadata_csum(sb)) | |
155 | es->s_checksum = ext4_superblock_csum(sb, es); | |
156 | set_buffer_uptodate(bh); | |
157 | unlock_buffer(bh); | |
158 | ||
159 | if (err) | |
160 | goto out_bh; | |
161 | ||
162 | if (handle) { | |
163 | err = ext4_handle_dirty_metadata(handle, NULL, bh); | |
164 | if (err) | |
165 | goto out_bh; | |
166 | } else { | |
167 | BUFFER_TRACE(bh, "marking dirty"); | |
168 | mark_buffer_dirty(bh); | |
169 | } | |
170 | err = sync_dirty_buffer(bh); | |
171 | ||
172 | out_bh: | |
173 | brelse(bh); | |
174 | ext4_std_error(sb, err); | |
175 | return (err) ? err : 1; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Update primary and backup superblocks using the provided function | |
180 | * func and argument arg. | |
181 | * | |
182 | * Only the primary superblock and at most two backup superblock | |
183 | * modifications are journalled; the rest is modified without journal. | |
184 | * This is safe because e2fsck will re-write them if there is a problem, | |
185 | * and we're very unlikely to ever need more than two backups. | |
186 | */ | |
187 | static | |
188 | int ext4_update_superblocks_fn(struct super_block *sb, | |
189 | ext4_update_sb_callback func, | |
190 | const void *arg) | |
191 | { | |
192 | handle_t *handle; | |
193 | ext4_group_t ngroups; | |
194 | unsigned int three = 1; | |
195 | unsigned int five = 5; | |
196 | unsigned int seven = 7; | |
197 | int err = 0, ret, i; | |
198 | ext4_group_t grp, primary_grp; | |
199 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
200 | ||
201 | /* | |
202 | * We can't update superblocks while the online resize is running | |
203 | */ | |
204 | if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING, | |
205 | &sbi->s_ext4_flags)) { | |
206 | ext4_msg(sb, KERN_ERR, "Can't modify superblock while" | |
207 | "performing online resize"); | |
208 | return -EBUSY; | |
209 | } | |
210 | ||
211 | /* | |
212 | * We're only going to update primary superblock and two | |
213 | * backup superblocks in this transaction. | |
214 | */ | |
215 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3); | |
216 | if (IS_ERR(handle)) { | |
217 | err = PTR_ERR(handle); | |
218 | goto out; | |
219 | } | |
220 | ||
221 | /* Update primary superblock */ | |
222 | err = ext4_update_primary_sb(sb, handle, func, arg); | |
223 | if (err) { | |
224 | ext4_msg(sb, KERN_ERR, "Failed to update primary " | |
225 | "superblock"); | |
226 | goto out_journal; | |
227 | } | |
228 | ||
229 | primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr); | |
230 | ngroups = ext4_get_groups_count(sb); | |
231 | ||
232 | /* | |
233 | * Update backup superblocks. We have to start from group 0 | |
234 | * because it might not be where the primary superblock is | |
235 | * if the fs is mounted with -o sb=<backup_sb_block> | |
236 | */ | |
237 | i = 0; | |
238 | grp = 0; | |
239 | while (grp < ngroups) { | |
240 | /* Skip primary superblock */ | |
241 | if (grp == primary_grp) | |
242 | goto next_grp; | |
243 | ||
244 | ret = ext4_update_backup_sb(sb, handle, grp, func, arg); | |
245 | if (ret < 0) { | |
246 | /* Ignore bad checksum; try to update next sb */ | |
247 | if (ret == -EFSBADCRC) | |
248 | goto next_grp; | |
249 | err = ret; | |
250 | goto out_journal; | |
251 | } | |
252 | ||
253 | i += ret; | |
254 | if (handle && i > 1) { | |
255 | /* | |
256 | * We're only journalling primary superblock and | |
257 | * two backup superblocks; the rest is not | |
258 | * journalled. | |
259 | */ | |
260 | err = ext4_journal_stop(handle); | |
261 | if (err) | |
262 | goto out; | |
263 | handle = NULL; | |
264 | } | |
265 | next_grp: | |
266 | grp = ext4_list_backups(sb, &three, &five, &seven); | |
267 | } | |
268 | ||
269 | out_journal: | |
270 | if (handle) { | |
271 | ret = ext4_journal_stop(handle); | |
272 | if (ret && !err) | |
273 | err = ret; | |
274 | } | |
275 | out: | |
276 | clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags); | |
277 | smp_mb__after_atomic(); | |
278 | return err ? err : 0; | |
279 | } | |
280 | ||
919adbfe | 281 | /* |
393d1d1d DTB |
282 | * Swap memory between @a and @b for @len bytes. |
283 | * | |
284 | * @a: pointer to first memory area | |
285 | * @b: pointer to second memory area | |
286 | * @len: number of bytes to swap | |
287 | * | |
288 | */ | |
289 | static void memswap(void *a, void *b, size_t len) | |
290 | { | |
291 | unsigned char *ap, *bp; | |
393d1d1d DTB |
292 | |
293 | ap = (unsigned char *)a; | |
294 | bp = (unsigned char *)b; | |
295 | while (len-- > 0) { | |
4b7e2db5 | 296 | swap(*ap, *bp); |
393d1d1d DTB |
297 | ap++; |
298 | bp++; | |
299 | } | |
300 | } | |
301 | ||
919adbfe | 302 | /* |
393d1d1d DTB |
303 | * Swap i_data and associated attributes between @inode1 and @inode2. |
304 | * This function is used for the primary swap between inode1 and inode2 | |
305 | * and also to revert this primary swap in case of errors. | |
306 | * | |
307 | * Therefore you have to make sure, that calling this method twice | |
308 | * will revert all changes. | |
309 | * | |
310 | * @inode1: pointer to first inode | |
311 | * @inode2: pointer to second inode | |
312 | */ | |
313 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) | |
314 | { | |
315 | loff_t isize; | |
316 | struct ext4_inode_info *ei1; | |
317 | struct ext4_inode_info *ei2; | |
abdc644e | 318 | unsigned long tmp; |
393d1d1d DTB |
319 | |
320 | ei1 = EXT4_I(inode1); | |
321 | ei2 = EXT4_I(inode2); | |
322 | ||
9c5d58fb | 323 | swap(inode1->i_version, inode2->i_version); |
9c5d58fb JL |
324 | swap(inode1->i_atime, inode2->i_atime); |
325 | swap(inode1->i_mtime, inode2->i_mtime); | |
393d1d1d DTB |
326 | |
327 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); | |
abdc644e | 328 | tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP; |
329 | ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) | | |
330 | (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP); | |
331 | ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP); | |
9c5d58fb | 332 | swap(ei1->i_disksize, ei2->i_disksize); |
cde2d7a7 TT |
333 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
334 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); | |
393d1d1d DTB |
335 | |
336 | isize = i_size_read(inode1); | |
337 | i_size_write(inode1, i_size_read(inode2)); | |
338 | i_size_write(inode2, isize); | |
339 | } | |
340 | ||
8016e29f | 341 | void ext4_reset_inode_seed(struct inode *inode) |
18aded17 TT |
342 | { |
343 | struct ext4_inode_info *ei = EXT4_I(inode); | |
344 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
345 | __le32 inum = cpu_to_le32(inode->i_ino); | |
346 | __le32 gen = cpu_to_le32(inode->i_generation); | |
347 | __u32 csum; | |
348 | ||
349 | if (!ext4_has_metadata_csum(inode->i_sb)) | |
350 | return; | |
351 | ||
352 | csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum)); | |
353 | ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen)); | |
354 | } | |
355 | ||
919adbfe | 356 | /* |
393d1d1d DTB |
357 | * Swap the information from the given @inode and the inode |
358 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other | |
359 | * important fields of the inodes. | |
360 | * | |
361 | * @sb: the super block of the filesystem | |
14f3db55 | 362 | * @mnt_userns: user namespace of the mount the inode was found from |
393d1d1d DTB |
363 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO |
364 | * | |
365 | */ | |
366 | static long swap_inode_boot_loader(struct super_block *sb, | |
14f3db55 | 367 | struct user_namespace *mnt_userns, |
393d1d1d DTB |
368 | struct inode *inode) |
369 | { | |
370 | handle_t *handle; | |
371 | int err; | |
372 | struct inode *inode_bl; | |
393d1d1d | 373 | struct ext4_inode_info *ei_bl; |
aa507b5f | 374 | qsize_t size, size_bl, diff; |
375 | blkcnt_t blocks; | |
376 | unsigned short bytes; | |
393d1d1d | 377 | |
8a363970 | 378 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL); |
d8558a29 TT |
379 | if (IS_ERR(inode_bl)) |
380 | return PTR_ERR(inode_bl); | |
393d1d1d DTB |
381 | ei_bl = EXT4_I(inode_bl); |
382 | ||
393d1d1d DTB |
383 | /* Protect orig inodes against a truncate and make sure, |
384 | * that only 1 swap_inode_boot_loader is running. */ | |
375e289e | 385 | lock_two_nondirectories(inode, inode_bl); |
393d1d1d | 386 | |
67a11611 | 387 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) || |
388 | IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) || | |
6e589291 | 389 | (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) || |
67a11611 | 390 | ext4_has_inline_data(inode)) { |
391 | err = -EINVAL; | |
392 | goto journal_err_out; | |
393 | } | |
394 | ||
395 | if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) || | |
14f3db55 | 396 | !inode_owner_or_capable(mnt_userns, inode) || |
21cb47be | 397 | !capable(CAP_SYS_ADMIN)) { |
67a11611 | 398 | err = -EPERM; |
399 | goto journal_err_out; | |
400 | } | |
401 | ||
d4f5258e | 402 | filemap_invalidate_lock(inode->i_mapping); |
a46c68a3 | 403 | err = filemap_write_and_wait(inode->i_mapping); |
404 | if (err) | |
405 | goto err_out; | |
406 | ||
407 | err = filemap_write_and_wait(inode_bl->i_mapping); | |
408 | if (err) | |
409 | goto err_out; | |
410 | ||
393d1d1d | 411 | /* Wait for all existing dio workers */ |
393d1d1d DTB |
412 | inode_dio_wait(inode); |
413 | inode_dio_wait(inode_bl); | |
414 | ||
18aded17 TT |
415 | truncate_inode_pages(&inode->i_data, 0); |
416 | truncate_inode_pages(&inode_bl->i_data, 0); | |
417 | ||
393d1d1d DTB |
418 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); |
419 | if (IS_ERR(handle)) { | |
420 | err = -EINVAL; | |
a46c68a3 | 421 | goto err_out; |
393d1d1d | 422 | } |
e85c81ba | 423 | ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle); |
393d1d1d DTB |
424 | |
425 | /* Protect extent tree against block allocations via delalloc */ | |
426 | ext4_double_down_write_data_sem(inode, inode_bl); | |
427 | ||
428 | if (inode_bl->i_nlink == 0) { | |
429 | /* this inode has never been used as a BOOT_LOADER */ | |
430 | set_nlink(inode_bl, 1); | |
431 | i_uid_write(inode_bl, 0); | |
432 | i_gid_write(inode_bl, 0); | |
433 | inode_bl->i_flags = 0; | |
434 | ei_bl->i_flags = 0; | |
ee73f9a5 | 435 | inode_set_iversion(inode_bl, 1); |
393d1d1d DTB |
436 | i_size_write(inode_bl, 0); |
437 | inode_bl->i_mode = S_IFREG; | |
e2b911c5 | 438 | if (ext4_has_feature_extents(sb)) { |
393d1d1d DTB |
439 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
440 | ext4_ext_tree_init(handle, inode_bl); | |
441 | } else | |
442 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); | |
443 | } | |
444 | ||
aa507b5f | 445 | err = dquot_initialize(inode); |
446 | if (err) | |
447 | goto err_out1; | |
448 | ||
449 | size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes; | |
450 | size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes; | |
451 | diff = size - size_bl; | |
393d1d1d DTB |
452 | swap_inode_data(inode, inode_bl); |
453 | ||
eeca7ea1 | 454 | inode->i_ctime = inode_bl->i_ctime = current_time(inode); |
393d1d1d | 455 | |
23253068 TT |
456 | inode->i_generation = prandom_u32(); |
457 | inode_bl->i_generation = prandom_u32(); | |
8016e29f HS |
458 | ext4_reset_inode_seed(inode); |
459 | ext4_reset_inode_seed(inode_bl); | |
393d1d1d | 460 | |
27bc446e | 461 | ext4_discard_preallocations(inode, 0); |
393d1d1d DTB |
462 | |
463 | err = ext4_mark_inode_dirty(handle, inode); | |
464 | if (err < 0) { | |
aa507b5f | 465 | /* No need to update quota information. */ |
393d1d1d DTB |
466 | ext4_warning(inode->i_sb, |
467 | "couldn't mark inode #%lu dirty (err %d)", | |
468 | inode->i_ino, err); | |
469 | /* Revert all changes: */ | |
470 | swap_inode_data(inode, inode_bl); | |
18aded17 | 471 | ext4_mark_inode_dirty(handle, inode); |
aa507b5f | 472 | goto err_out1; |
473 | } | |
474 | ||
475 | blocks = inode_bl->i_blocks; | |
476 | bytes = inode_bl->i_bytes; | |
477 | inode_bl->i_blocks = inode->i_blocks; | |
478 | inode_bl->i_bytes = inode->i_bytes; | |
479 | err = ext4_mark_inode_dirty(handle, inode_bl); | |
480 | if (err < 0) { | |
481 | /* No need to update quota information. */ | |
482 | ext4_warning(inode_bl->i_sb, | |
483 | "couldn't mark inode #%lu dirty (err %d)", | |
484 | inode_bl->i_ino, err); | |
485 | goto revert; | |
486 | } | |
487 | ||
488 | /* Bootloader inode should not be counted into quota information. */ | |
489 | if (diff > 0) | |
490 | dquot_free_space(inode, diff); | |
491 | else | |
492 | err = dquot_alloc_space(inode, -1 * diff); | |
493 | ||
494 | if (err < 0) { | |
495 | revert: | |
496 | /* Revert all changes: */ | |
497 | inode_bl->i_blocks = blocks; | |
498 | inode_bl->i_bytes = bytes; | |
499 | swap_inode_data(inode, inode_bl); | |
500 | ext4_mark_inode_dirty(handle, inode); | |
501 | ext4_mark_inode_dirty(handle, inode_bl); | |
393d1d1d | 502 | } |
aa507b5f | 503 | |
504 | err_out1: | |
393d1d1d | 505 | ext4_journal_stop(handle); |
393d1d1d DTB |
506 | ext4_double_up_write_data_sem(inode, inode_bl); |
507 | ||
a46c68a3 | 508 | err_out: |
d4f5258e | 509 | filemap_invalidate_unlock(inode->i_mapping); |
30d29b11 | 510 | journal_err_out: |
375e289e | 511 | unlock_two_nondirectories(inode, inode_bl); |
393d1d1d | 512 | iput(inode_bl); |
393d1d1d DTB |
513 | return err; |
514 | } | |
515 | ||
2e538403 DW |
516 | /* |
517 | * If immutable is set and we are not clearing it, we're not allowed to change | |
518 | * anything else in the inode. Don't error out if we're only trying to set | |
519 | * immutable on an immutable file. | |
520 | */ | |
521 | static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid, | |
522 | unsigned int flags) | |
523 | { | |
524 | struct ext4_inode_info *ei = EXT4_I(inode); | |
525 | unsigned int oldflags = ei->i_flags; | |
526 | ||
527 | if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL)) | |
528 | return 0; | |
529 | ||
530 | if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL)) | |
531 | return -EPERM; | |
532 | if (ext4_has_feature_project(inode->i_sb) && | |
533 | __kprojid_val(ei->i_projid) != new_projid) | |
534 | return -EPERM; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
b383a73f IW |
539 | static void ext4_dax_dontcache(struct inode *inode, unsigned int flags) |
540 | { | |
541 | struct ext4_inode_info *ei = EXT4_I(inode); | |
542 | ||
543 | if (S_ISDIR(inode->i_mode)) | |
544 | return; | |
545 | ||
546 | if (test_opt2(inode->i_sb, DAX_NEVER) || | |
547 | test_opt(inode->i_sb, DAX_ALWAYS)) | |
548 | return; | |
549 | ||
550 | if ((ei->i_flags ^ flags) & EXT4_DAX_FL) | |
551 | d_mark_dontcache(inode); | |
552 | } | |
553 | ||
554 | static bool dax_compatible(struct inode *inode, unsigned int oldflags, | |
555 | unsigned int flags) | |
556 | { | |
4811d992 TT |
557 | /* Allow the DAX flag to be changed on inline directories */ |
558 | if (S_ISDIR(inode->i_mode)) { | |
559 | flags &= ~EXT4_INLINE_DATA_FL; | |
560 | oldflags &= ~EXT4_INLINE_DATA_FL; | |
561 | } | |
562 | ||
b383a73f IW |
563 | if (flags & EXT4_DAX_FL) { |
564 | if ((oldflags & EXT4_DAX_MUT_EXCL) || | |
565 | ext4_test_inode_state(inode, | |
566 | EXT4_STATE_VERITY_IN_PROGRESS)) { | |
567 | return false; | |
568 | } | |
569 | } | |
570 | ||
571 | if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL)) | |
572 | return false; | |
573 | ||
574 | return true; | |
575 | } | |
576 | ||
9b7365fc LX |
577 | static int ext4_ioctl_setflags(struct inode *inode, |
578 | unsigned int flags) | |
579 | { | |
580 | struct ext4_inode_info *ei = EXT4_I(inode); | |
581 | handle_t *handle = NULL; | |
fdde368e | 582 | int err = -EPERM, migrate = 0; |
9b7365fc LX |
583 | struct ext4_iloc iloc; |
584 | unsigned int oldflags, mask, i; | |
b886ee3e | 585 | struct super_block *sb = inode->i_sb; |
9b7365fc LX |
586 | |
587 | /* Is it quota file? Do not allow user to mess with it */ | |
02749a4c | 588 | if (ext4_is_quota_file(inode)) |
9b7365fc LX |
589 | goto flags_out; |
590 | ||
591 | oldflags = ei->i_flags; | |
9b7365fc LX |
592 | /* |
593 | * The JOURNAL_DATA flag can only be changed by | |
594 | * the relevant capability. | |
595 | */ | |
fcebc794 | 596 | if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
9b7365fc LX |
597 | if (!capable(CAP_SYS_RESOURCE)) |
598 | goto flags_out; | |
599 | } | |
b383a73f IW |
600 | |
601 | if (!dax_compatible(inode, oldflags, flags)) { | |
602 | err = -EOPNOTSUPP; | |
603 | goto flags_out; | |
604 | } | |
605 | ||
9b7365fc LX |
606 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
607 | migrate = 1; | |
608 | ||
b886ee3e GKB |
609 | if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { |
610 | if (!ext4_has_feature_casefold(sb)) { | |
611 | err = -EOPNOTSUPP; | |
612 | goto flags_out; | |
613 | } | |
614 | ||
615 | if (!S_ISDIR(inode->i_mode)) { | |
616 | err = -ENOTDIR; | |
617 | goto flags_out; | |
618 | } | |
619 | ||
620 | if (!ext4_empty_dir(inode)) { | |
621 | err = -ENOTEMPTY; | |
622 | goto flags_out; | |
623 | } | |
624 | } | |
625 | ||
2e538403 DW |
626 | /* |
627 | * Wait for all pending directio and then flush all the dirty pages | |
628 | * for this file. The flush marks all the pages readonly, so any | |
629 | * subsequent attempt to write to the file (particularly mmap pages) | |
630 | * will come through the filesystem and fail. | |
631 | */ | |
632 | if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) && | |
633 | (flags & EXT4_IMMUTABLE_FL)) { | |
634 | inode_dio_wait(inode); | |
635 | err = filemap_write_and_wait(inode->i_mapping); | |
636 | if (err) | |
637 | goto flags_out; | |
638 | } | |
639 | ||
9b7365fc LX |
640 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
641 | if (IS_ERR(handle)) { | |
642 | err = PTR_ERR(handle); | |
643 | goto flags_out; | |
644 | } | |
645 | if (IS_SYNC(inode)) | |
646 | ext4_handle_sync(handle); | |
647 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
648 | if (err) | |
649 | goto flags_err; | |
650 | ||
b383a73f IW |
651 | ext4_dax_dontcache(inode, flags); |
652 | ||
9b7365fc LX |
653 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
654 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) | |
655 | continue; | |
f8011d93 JK |
656 | /* These flags get special treatment later */ |
657 | if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) | |
658 | continue; | |
9b7365fc LX |
659 | if (mask & flags) |
660 | ext4_set_inode_flag(inode, i); | |
661 | else | |
662 | ext4_clear_inode_flag(inode, i); | |
663 | } | |
664 | ||
043546e4 IW |
665 | ext4_set_inode_flags(inode, false); |
666 | ||
eeca7ea1 | 667 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
668 | |
669 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
670 | flags_err: | |
671 | ext4_journal_stop(handle); | |
672 | if (err) | |
673 | goto flags_out; | |
674 | ||
fcebc794 | 675 | if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
e9072d85 RZ |
676 | /* |
677 | * Changes to the journaling mode can cause unsafe changes to | |
ff694ab6 | 678 | * S_DAX if the inode is DAX |
e9072d85 | 679 | */ |
ff694ab6 | 680 | if (IS_DAX(inode)) { |
e9072d85 RZ |
681 | err = -EBUSY; |
682 | goto flags_out; | |
683 | } | |
684 | ||
fcebc794 IW |
685 | err = ext4_change_inode_journal_flag(inode, |
686 | flags & EXT4_JOURNAL_DATA_FL); | |
e9072d85 RZ |
687 | if (err) |
688 | goto flags_out; | |
689 | } | |
9b7365fc LX |
690 | if (migrate) { |
691 | if (flags & EXT4_EXTENTS_FL) | |
692 | err = ext4_ext_migrate(inode); | |
693 | else | |
694 | err = ext4_ind_migrate(inode); | |
695 | } | |
696 | ||
697 | flags_out: | |
698 | return err; | |
699 | } | |
700 | ||
701 | #ifdef CONFIG_QUOTA | |
4db5c2e6 | 702 | static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) |
9b7365fc | 703 | { |
9b7365fc LX |
704 | struct super_block *sb = inode->i_sb; |
705 | struct ext4_inode_info *ei = EXT4_I(inode); | |
706 | int err, rc; | |
707 | handle_t *handle; | |
708 | kprojid_t kprojid; | |
709 | struct ext4_iloc iloc; | |
710 | struct ext4_inode *raw_inode; | |
079788d0 | 711 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
9b7365fc | 712 | |
0b7b7779 | 713 | if (!ext4_has_feature_project(sb)) { |
9b7365fc LX |
714 | if (projid != EXT4_DEF_PROJID) |
715 | return -EOPNOTSUPP; | |
716 | else | |
717 | return 0; | |
718 | } | |
719 | ||
720 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) | |
721 | return -EOPNOTSUPP; | |
722 | ||
723 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); | |
724 | ||
725 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) | |
726 | return 0; | |
727 | ||
9b7365fc | 728 | err = -EPERM; |
9b7365fc | 729 | /* Is it quota file? Do not allow user to mess with it */ |
02749a4c | 730 | if (ext4_is_quota_file(inode)) |
dc7ac6c4 | 731 | return err; |
9b7365fc LX |
732 | |
733 | err = ext4_get_inode_loc(inode, &iloc); | |
734 | if (err) | |
dc7ac6c4 | 735 | return err; |
9b7365fc LX |
736 | |
737 | raw_inode = ext4_raw_inode(&iloc); | |
738 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { | |
c03b45b8 MX |
739 | err = ext4_expand_extra_isize(inode, |
740 | EXT4_SB(sb)->s_want_extra_isize, | |
741 | &iloc); | |
742 | if (err) | |
dc7ac6c4 | 743 | return err; |
c03b45b8 | 744 | } else { |
9b7365fc | 745 | brelse(iloc.bh); |
9b7365fc | 746 | } |
9b7365fc | 747 | |
182a79e0 WS |
748 | err = dquot_initialize(inode); |
749 | if (err) | |
750 | return err; | |
9b7365fc LX |
751 | |
752 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, | |
753 | EXT4_QUOTA_INIT_BLOCKS(sb) + | |
754 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); | |
dc7ac6c4 WS |
755 | if (IS_ERR(handle)) |
756 | return PTR_ERR(handle); | |
9b7365fc LX |
757 | |
758 | err = ext4_reserve_inode_write(handle, inode, &iloc); | |
759 | if (err) | |
760 | goto out_stop; | |
761 | ||
079788d0 WS |
762 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
763 | if (!IS_ERR(transfer_to[PRJQUOTA])) { | |
7a9ca53a TE |
764 | |
765 | /* __dquot_transfer() calls back ext4_get_inode_usage() which | |
766 | * counts xattr inode references. | |
767 | */ | |
768 | down_read(&EXT4_I(inode)->xattr_sem); | |
079788d0 | 769 | err = __dquot_transfer(inode, transfer_to); |
7a9ca53a | 770 | up_read(&EXT4_I(inode)->xattr_sem); |
079788d0 WS |
771 | dqput(transfer_to[PRJQUOTA]); |
772 | if (err) | |
773 | goto out_dirty; | |
9b7365fc | 774 | } |
079788d0 | 775 | |
9b7365fc | 776 | EXT4_I(inode)->i_projid = kprojid; |
eeca7ea1 | 777 | inode->i_ctime = current_time(inode); |
9b7365fc LX |
778 | out_dirty: |
779 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); | |
780 | if (!err) | |
781 | err = rc; | |
782 | out_stop: | |
783 | ext4_journal_stop(handle); | |
9b7365fc LX |
784 | return err; |
785 | } | |
786 | #else | |
4db5c2e6 | 787 | static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) |
9b7365fc LX |
788 | { |
789 | if (projid != EXT4_DEF_PROJID) | |
790 | return -EOPNOTSUPP; | |
791 | return 0; | |
792 | } | |
793 | #endif | |
794 | ||
1a20a630 | 795 | static int ext4_shutdown(struct super_block *sb, unsigned long arg) |
783d9485 TT |
796 | { |
797 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
798 | __u32 flags; | |
799 | ||
800 | if (!capable(CAP_SYS_ADMIN)) | |
801 | return -EPERM; | |
802 | ||
803 | if (get_user(flags, (__u32 __user *)arg)) | |
804 | return -EFAULT; | |
805 | ||
806 | if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) | |
807 | return -EINVAL; | |
808 | ||
809 | if (ext4_forced_shutdown(sbi)) | |
810 | return 0; | |
811 | ||
812 | ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); | |
ccf0f32a | 813 | trace_ext4_shutdown(sb, flags); |
783d9485 TT |
814 | |
815 | switch (flags) { | |
816 | case EXT4_GOING_FLAGS_DEFAULT: | |
817 | freeze_bdev(sb->s_bdev); | |
818 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
040f04bd | 819 | thaw_bdev(sb->s_bdev); |
783d9485 TT |
820 | break; |
821 | case EXT4_GOING_FLAGS_LOGFLUSH: | |
822 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
823 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { | |
824 | (void) ext4_force_commit(sb); | |
fb7c0244 | 825 | jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); |
783d9485 TT |
826 | } |
827 | break; | |
828 | case EXT4_GOING_FLAGS_NOLOGFLUSH: | |
829 | set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
a6d9946b | 830 | if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) |
fb7c0244 | 831 | jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); |
783d9485 TT |
832 | break; |
833 | default: | |
834 | return -EINVAL; | |
835 | } | |
836 | clear_opt(sb, DISCARD); | |
837 | return 0; | |
838 | } | |
839 | ||
0c9ec4be DW |
840 | struct getfsmap_info { |
841 | struct super_block *gi_sb; | |
842 | struct fsmap_head __user *gi_data; | |
843 | unsigned int gi_idx; | |
844 | __u32 gi_last_flags; | |
845 | }; | |
846 | ||
847 | static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) | |
848 | { | |
849 | struct getfsmap_info *info = priv; | |
850 | struct fsmap fm; | |
851 | ||
852 | trace_ext4_getfsmap_mapping(info->gi_sb, xfm); | |
853 | ||
854 | info->gi_last_flags = xfm->fmr_flags; | |
855 | ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); | |
856 | if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, | |
857 | sizeof(struct fsmap))) | |
858 | return -EFAULT; | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | static int ext4_ioc_getfsmap(struct super_block *sb, | |
864 | struct fsmap_head __user *arg) | |
865 | { | |
0ba33fac | 866 | struct getfsmap_info info = { NULL }; |
0c9ec4be DW |
867 | struct ext4_fsmap_head xhead = {0}; |
868 | struct fsmap_head head; | |
869 | bool aborted = false; | |
870 | int error; | |
871 | ||
872 | if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) | |
873 | return -EFAULT; | |
874 | if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || | |
875 | memchr_inv(head.fmh_keys[0].fmr_reserved, 0, | |
876 | sizeof(head.fmh_keys[0].fmr_reserved)) || | |
877 | memchr_inv(head.fmh_keys[1].fmr_reserved, 0, | |
878 | sizeof(head.fmh_keys[1].fmr_reserved))) | |
879 | return -EINVAL; | |
880 | /* | |
881 | * ext4 doesn't report file extents at all, so the only valid | |
882 | * file offsets are the magic ones (all zeroes or all ones). | |
883 | */ | |
884 | if (head.fmh_keys[0].fmr_offset || | |
885 | (head.fmh_keys[1].fmr_offset != 0 && | |
886 | head.fmh_keys[1].fmr_offset != -1ULL)) | |
887 | return -EINVAL; | |
888 | ||
889 | xhead.fmh_iflags = head.fmh_iflags; | |
890 | xhead.fmh_count = head.fmh_count; | |
891 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); | |
892 | ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); | |
893 | ||
894 | trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); | |
895 | trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); | |
896 | ||
897 | info.gi_sb = sb; | |
898 | info.gi_data = arg; | |
899 | error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); | |
1fc57ca5 | 900 | if (error == EXT4_QUERY_RANGE_ABORT) |
0c9ec4be | 901 | aborted = true; |
1fc57ca5 | 902 | else if (error) |
0c9ec4be DW |
903 | return error; |
904 | ||
905 | /* If we didn't abort, set the "last" flag in the last fmx */ | |
906 | if (!aborted && info.gi_idx) { | |
907 | info.gi_last_flags |= FMR_OF_LAST; | |
908 | if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, | |
909 | &info.gi_last_flags, | |
910 | sizeof(info.gi_last_flags))) | |
911 | return -EFAULT; | |
912 | } | |
913 | ||
914 | /* copy back header */ | |
915 | head.fmh_entries = xhead.fmh_entries; | |
916 | head.fmh_oflags = xhead.fmh_oflags; | |
917 | if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) | |
918 | return -EFAULT; | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
e145b35b AV |
923 | static long ext4_ioctl_group_add(struct file *file, |
924 | struct ext4_new_group_data *input) | |
925 | { | |
926 | struct super_block *sb = file_inode(file)->i_sb; | |
927 | int err, err2=0; | |
928 | ||
929 | err = ext4_resize_begin(sb); | |
930 | if (err) | |
931 | return err; | |
932 | ||
8813587a TT |
933 | if (ext4_has_feature_bigalloc(sb)) { |
934 | ext4_msg(sb, KERN_ERR, | |
935 | "Online resizing not supported with bigalloc"); | |
936 | err = -EOPNOTSUPP; | |
937 | goto group_add_out; | |
938 | } | |
939 | ||
e145b35b AV |
940 | err = mnt_want_write_file(file); |
941 | if (err) | |
942 | goto group_add_out; | |
943 | ||
944 | err = ext4_group_add(sb, input); | |
945 | if (EXT4_SB(sb)->s_journal) { | |
946 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
01d5d965 | 947 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); |
e145b35b AV |
948 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
949 | } | |
950 | if (err == 0) | |
951 | err = err2; | |
952 | mnt_drop_write_file(file); | |
953 | if (!err && ext4_has_group_desc_csum(sb) && | |
954 | test_opt(sb, INIT_INODE_TABLE)) | |
955 | err = ext4_register_li_request(sb, input->group); | |
956 | group_add_out: | |
827891a3 TT |
957 | err2 = ext4_resize_end(sb, false); |
958 | if (err == 0) | |
959 | err = err2; | |
e145b35b AV |
960 | return err; |
961 | } | |
962 | ||
4db5c2e6 | 963 | int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa) |
dc7ac6c4 | 964 | { |
4db5c2e6 | 965 | struct inode *inode = d_inode(dentry); |
7b0e492e | 966 | struct ext4_inode_info *ei = EXT4_I(inode); |
4db5c2e6 | 967 | u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
dc7ac6c4 | 968 | |
4db5c2e6 MS |
969 | if (S_ISREG(inode->i_mode)) |
970 | flags &= ~FS_PROJINHERIT_FL; | |
dc7ac6c4 | 971 | |
4db5c2e6 | 972 | fileattr_fill_flags(fa, flags); |
7b0e492e DW |
973 | if (ext4_has_feature_project(inode->i_sb)) |
974 | fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); | |
4db5c2e6 MS |
975 | |
976 | return 0; | |
977 | } | |
978 | ||
979 | int ext4_fileattr_set(struct user_namespace *mnt_userns, | |
980 | struct dentry *dentry, struct fileattr *fa) | |
981 | { | |
982 | struct inode *inode = d_inode(dentry); | |
983 | u32 flags = fa->flags; | |
984 | int err = -EOPNOTSUPP; | |
985 | ||
4db5c2e6 MS |
986 | if (flags & ~EXT4_FL_USER_VISIBLE) |
987 | goto out; | |
988 | ||
989 | /* | |
990 | * chattr(1) grabs flags via GETFLAGS, modifies the result and | |
991 | * passes that to SETFLAGS. So we cannot easily make SETFLAGS | |
992 | * more restrictive than just silently masking off visible but | |
993 | * not settable flags as we always did. | |
994 | */ | |
995 | flags &= EXT4_FL_USER_MODIFIABLE; | |
996 | if (ext4_mask_flags(inode->i_mode, flags) != flags) | |
997 | goto out; | |
998 | err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags); | |
999 | if (err) | |
1000 | goto out; | |
1001 | err = ext4_ioctl_setflags(inode, flags); | |
1002 | if (err) | |
1003 | goto out; | |
1004 | err = ext4_ioctl_setproject(inode, fa->fsx_projid); | |
1005 | out: | |
4db5c2e6 | 1006 | return err; |
dc7ac6c4 WS |
1007 | } |
1008 | ||
bb5835ed TT |
1009 | /* So that the fiemap access checks can't overflow on 32 bit machines. */ |
1010 | #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) | |
1011 | ||
1012 | static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg) | |
1013 | { | |
1014 | struct fiemap fiemap; | |
1015 | struct fiemap __user *ufiemap = (struct fiemap __user *) arg; | |
1016 | struct fiemap_extent_info fieinfo = { 0, }; | |
1017 | struct inode *inode = file_inode(filp); | |
bb5835ed TT |
1018 | int error; |
1019 | ||
1020 | if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) | |
1021 | return -EFAULT; | |
1022 | ||
1023 | if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) | |
1024 | return -EINVAL; | |
1025 | ||
bb5835ed TT |
1026 | fieinfo.fi_flags = fiemap.fm_flags; |
1027 | fieinfo.fi_extents_max = fiemap.fm_extent_count; | |
1028 | fieinfo.fi_extents_start = ufiemap->fm_extents; | |
1029 | ||
328e24ae CH |
1030 | error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, |
1031 | fiemap.fm_length); | |
bb5835ed TT |
1032 | fiemap.fm_flags = fieinfo.fi_flags; |
1033 | fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; | |
1034 | if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) | |
1035 | error = -EFAULT; | |
1036 | ||
1037 | return error; | |
1038 | } | |
1039 | ||
351a0a3f LR |
1040 | static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg) |
1041 | { | |
1042 | int err = 0; | |
1043 | __u32 flags = 0; | |
1044 | unsigned int flush_flags = 0; | |
1045 | struct super_block *sb = file_inode(filp)->i_sb; | |
351a0a3f LR |
1046 | |
1047 | if (copy_from_user(&flags, (__u32 __user *)arg, | |
1048 | sizeof(__u32))) | |
1049 | return -EFAULT; | |
1050 | ||
1051 | if (!capable(CAP_SYS_ADMIN)) | |
1052 | return -EPERM; | |
1053 | ||
1054 | /* check for invalid bits set */ | |
1055 | if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) || | |
1056 | ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && | |
1057 | (flags & JBD2_JOURNAL_FLUSH_ZEROOUT))) | |
1058 | return -EINVAL; | |
1059 | ||
1060 | if (!EXT4_SB(sb)->s_journal) | |
1061 | return -ENODEV; | |
1062 | ||
09559019 | 1063 | if (flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) |
351a0a3f LR |
1064 | return -EINVAL; |
1065 | ||
70200574 CH |
1066 | if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && |
1067 | !bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev)) | |
351a0a3f LR |
1068 | return -EOPNOTSUPP; |
1069 | ||
1070 | if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) | |
1071 | return 0; | |
1072 | ||
1073 | if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD) | |
1074 | flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD; | |
1075 | ||
1076 | if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) { | |
1077 | flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT; | |
1078 | pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow"); | |
1079 | } | |
1080 | ||
1081 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
1082 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags); | |
1083 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
1084 | ||
1085 | return err; | |
1086 | } | |
1087 | ||
bbc605cd LC |
1088 | static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label) |
1089 | { | |
1090 | size_t len; | |
1091 | int ret = 0; | |
1092 | char new_label[EXT4_LABEL_MAX + 1]; | |
1093 | struct super_block *sb = file_inode(filp)->i_sb; | |
1094 | ||
1095 | if (!capable(CAP_SYS_ADMIN)) | |
1096 | return -EPERM; | |
1097 | ||
1098 | /* | |
1099 | * Copy the maximum length allowed for ext4 label with one more to | |
1100 | * find the required terminating null byte in order to test the | |
1101 | * label length. The on disk label doesn't need to be null terminated. | |
1102 | */ | |
1103 | if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1)) | |
1104 | return -EFAULT; | |
1105 | ||
1106 | len = strnlen(new_label, EXT4_LABEL_MAX + 1); | |
1107 | if (len > EXT4_LABEL_MAX) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | /* | |
1111 | * Clear the buffer after the new label | |
1112 | */ | |
1113 | memset(new_label + len, 0, EXT4_LABEL_MAX - len); | |
1114 | ||
1115 | ret = mnt_want_write_file(filp); | |
1116 | if (ret) | |
1117 | return ret; | |
1118 | ||
1119 | ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label); | |
1120 | ||
1121 | mnt_drop_write_file(filp); | |
1122 | return ret; | |
1123 | } | |
1124 | ||
1125 | static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label) | |
1126 | { | |
1127 | char label[EXT4_LABEL_MAX + 1]; | |
1128 | ||
1129 | /* | |
1130 | * EXT4_LABEL_MAX must always be smaller than FSLABEL_MAX because | |
1131 | * FSLABEL_MAX must include terminating null byte, while s_volume_name | |
1132 | * does not have to. | |
1133 | */ | |
1134 | BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX); | |
1135 | ||
1136 | memset(label, 0, sizeof(label)); | |
1137 | lock_buffer(sbi->s_sbh); | |
1138 | strncpy(label, sbi->s_es->s_volume_name, EXT4_LABEL_MAX); | |
1139 | unlock_buffer(sbi->s_sbh); | |
1140 | ||
1141 | if (copy_to_user(user_label, label, sizeof(label))) | |
1142 | return -EFAULT; | |
1143 | return 0; | |
1144 | } | |
1145 | ||
d95efb14 JB |
1146 | static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi, |
1147 | struct fsuuid __user *ufsuuid) | |
1148 | { | |
1149 | struct fsuuid fsuuid; | |
1150 | __u8 uuid[UUID_SIZE]; | |
1151 | ||
1152 | if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid))) | |
1153 | return -EFAULT; | |
1154 | ||
1155 | if (fsuuid.fsu_len == 0) { | |
1156 | fsuuid.fsu_len = UUID_SIZE; | |
1157 | if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid.fsu_len))) | |
1158 | return -EFAULT; | |
1159 | return -EINVAL; | |
1160 | } | |
1161 | ||
1162 | if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0) | |
1163 | return -EINVAL; | |
1164 | ||
1165 | lock_buffer(sbi->s_sbh); | |
1166 | memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE); | |
1167 | unlock_buffer(sbi->s_sbh); | |
1168 | ||
1169 | if (copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE)) | |
1170 | return -EFAULT; | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static int ext4_ioctl_setuuid(struct file *filp, | |
1175 | const struct fsuuid __user *ufsuuid) | |
1176 | { | |
1177 | int ret = 0; | |
1178 | struct super_block *sb = file_inode(filp)->i_sb; | |
1179 | struct fsuuid fsuuid; | |
1180 | __u8 uuid[UUID_SIZE]; | |
1181 | ||
1182 | if (!capable(CAP_SYS_ADMIN)) | |
1183 | return -EPERM; | |
1184 | ||
1185 | /* | |
1186 | * If any checksums (group descriptors or metadata) are being used | |
1187 | * then the checksum seed feature is required to change the UUID. | |
1188 | */ | |
1189 | if (((ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb)) | |
1190 | && !ext4_has_feature_csum_seed(sb)) | |
1191 | || ext4_has_feature_stable_inodes(sb)) | |
1192 | return -EOPNOTSUPP; | |
1193 | ||
1194 | if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid))) | |
1195 | return -EFAULT; | |
1196 | ||
1197 | if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0) | |
1198 | return -EINVAL; | |
1199 | ||
1200 | if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE)) | |
1201 | return -EFAULT; | |
1202 | ||
1203 | ret = mnt_want_write_file(filp); | |
1204 | if (ret) | |
1205 | return ret; | |
1206 | ||
1207 | ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid); | |
1208 | mnt_drop_write_file(filp); | |
1209 | ||
1210 | return ret; | |
1211 | } | |
1212 | ||
aa75f4d3 | 1213 | static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1214 | { |
496ad9aa | 1215 | struct inode *inode = file_inode(filp); |
bab08ab9 | 1216 | struct super_block *sb = inode->i_sb; |
14f3db55 | 1217 | struct user_namespace *mnt_userns = file_mnt_user_ns(filp); |
ac27a0ec | 1218 | |
af5bc92d | 1219 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
ac27a0ec DK |
1220 | |
1221 | switch (cmd) { | |
0c9ec4be DW |
1222 | case FS_IOC_GETFSMAP: |
1223 | return ext4_ioc_getfsmap(sb, (void __user *)arg); | |
617ba13b MC |
1224 | case EXT4_IOC_GETVERSION: |
1225 | case EXT4_IOC_GETVERSION_OLD: | |
ac27a0ec | 1226 | return put_user(inode->i_generation, (int __user *) arg); |
617ba13b MC |
1227 | case EXT4_IOC_SETVERSION: |
1228 | case EXT4_IOC_SETVERSION_OLD: { | |
ac27a0ec | 1229 | handle_t *handle; |
617ba13b | 1230 | struct ext4_iloc iloc; |
ac27a0ec DK |
1231 | __u32 generation; |
1232 | int err; | |
1233 | ||
14f3db55 | 1234 | if (!inode_owner_or_capable(mnt_userns, inode)) |
ac27a0ec | 1235 | return -EPERM; |
42a74f20 | 1236 | |
9aa5d32b | 1237 | if (ext4_has_metadata_csum(inode->i_sb)) { |
814525f4 DW |
1238 | ext4_warning(sb, "Setting inode version is not " |
1239 | "supported with metadata_csum enabled."); | |
1240 | return -ENOTTY; | |
1241 | } | |
1242 | ||
a561be71 | 1243 | err = mnt_want_write_file(filp); |
42a74f20 DH |
1244 | if (err) |
1245 | return err; | |
1246 | if (get_user(generation, (int __user *) arg)) { | |
1247 | err = -EFAULT; | |
1248 | goto setversion_out; | |
1249 | } | |
ac27a0ec | 1250 | |
5955102c | 1251 | inode_lock(inode); |
9924a92a | 1252 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
42a74f20 DH |
1253 | if (IS_ERR(handle)) { |
1254 | err = PTR_ERR(handle); | |
6c2155b9 | 1255 | goto unlock_out; |
42a74f20 | 1256 | } |
617ba13b | 1257 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
ac27a0ec | 1258 | if (err == 0) { |
eeca7ea1 | 1259 | inode->i_ctime = current_time(inode); |
ac27a0ec | 1260 | inode->i_generation = generation; |
617ba13b | 1261 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
ac27a0ec | 1262 | } |
617ba13b | 1263 | ext4_journal_stop(handle); |
6c2155b9 DH |
1264 | |
1265 | unlock_out: | |
5955102c | 1266 | inode_unlock(inode); |
42a74f20 | 1267 | setversion_out: |
2a79f17e | 1268 | mnt_drop_write_file(filp); |
ac27a0ec DK |
1269 | return err; |
1270 | } | |
617ba13b MC |
1271 | case EXT4_IOC_GROUP_EXTEND: { |
1272 | ext4_fsblk_t n_blocks_count; | |
ac046f1d | 1273 | int err, err2=0; |
ac27a0ec | 1274 | |
8f82f840 YY |
1275 | err = ext4_resize_begin(sb); |
1276 | if (err) | |
1277 | return err; | |
ac27a0ec | 1278 | |
014a1770 DH |
1279 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
1280 | err = -EFAULT; | |
1281 | goto group_extend_out; | |
1282 | } | |
ac27a0ec | 1283 | |
8813587a TT |
1284 | if (ext4_has_feature_bigalloc(sb)) { |
1285 | ext4_msg(sb, KERN_ERR, | |
1286 | "Online resizing not supported with bigalloc"); | |
1287 | err = -EOPNOTSUPP; | |
1288 | goto group_extend_out; | |
1289 | } | |
1290 | ||
a561be71 | 1291 | err = mnt_want_write_file(filp); |
42a74f20 | 1292 | if (err) |
014a1770 | 1293 | goto group_extend_out; |
42a74f20 | 1294 | |
617ba13b | 1295 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
ac046f1d PT |
1296 | if (EXT4_SB(sb)->s_journal) { |
1297 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
01d5d965 | 1298 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); |
ac046f1d PT |
1299 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
1300 | } | |
7ffe1ea8 HK |
1301 | if (err == 0) |
1302 | err = err2; | |
2a79f17e | 1303 | mnt_drop_write_file(filp); |
014a1770 | 1304 | group_extend_out: |
827891a3 TT |
1305 | err2 = ext4_resize_end(sb, false); |
1306 | if (err == 0) | |
1307 | err = err2; | |
ac27a0ec DK |
1308 | return err; |
1309 | } | |
748de673 AF |
1310 | |
1311 | case EXT4_IOC_MOVE_EXT: { | |
1312 | struct move_extent me; | |
2903ff01 AV |
1313 | struct fd donor; |
1314 | int err; | |
748de673 | 1315 | |
4a58579b AF |
1316 | if (!(filp->f_mode & FMODE_READ) || |
1317 | !(filp->f_mode & FMODE_WRITE)) | |
1318 | return -EBADF; | |
1319 | ||
748de673 AF |
1320 | if (copy_from_user(&me, |
1321 | (struct move_extent __user *)arg, sizeof(me))) | |
1322 | return -EFAULT; | |
4a58579b | 1323 | me.moved_len = 0; |
748de673 | 1324 | |
2903ff01 AV |
1325 | donor = fdget(me.donor_fd); |
1326 | if (!donor.file) | |
748de673 AF |
1327 | return -EBADF; |
1328 | ||
2903ff01 | 1329 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
4a58579b AF |
1330 | err = -EBADF; |
1331 | goto mext_out; | |
748de673 AF |
1332 | } |
1333 | ||
e2b911c5 | 1334 | if (ext4_has_feature_bigalloc(sb)) { |
bab08ab9 TT |
1335 | ext4_msg(sb, KERN_ERR, |
1336 | "Online defrag not supported with bigalloc"); | |
399c9b86 AV |
1337 | err = -EOPNOTSUPP; |
1338 | goto mext_out; | |
73f34a5e RZ |
1339 | } else if (IS_DAX(inode)) { |
1340 | ext4_msg(sb, KERN_ERR, | |
1341 | "Online defrag not supported with DAX"); | |
1342 | err = -EOPNOTSUPP; | |
1343 | goto mext_out; | |
bab08ab9 TT |
1344 | } |
1345 | ||
a561be71 | 1346 | err = mnt_want_write_file(filp); |
4a58579b AF |
1347 | if (err) |
1348 | goto mext_out; | |
1349 | ||
2903ff01 | 1350 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
748de673 | 1351 | me.donor_start, me.len, &me.moved_len); |
2a79f17e | 1352 | mnt_drop_write_file(filp); |
748de673 | 1353 | |
60e6679e | 1354 | if (copy_to_user((struct move_extent __user *)arg, |
c437b273 | 1355 | &me, sizeof(me))) |
4a58579b AF |
1356 | err = -EFAULT; |
1357 | mext_out: | |
2903ff01 | 1358 | fdput(donor); |
748de673 AF |
1359 | return err; |
1360 | } | |
1361 | ||
617ba13b MC |
1362 | case EXT4_IOC_GROUP_ADD: { |
1363 | struct ext4_new_group_data input; | |
ac27a0ec | 1364 | |
617ba13b | 1365 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
e145b35b AV |
1366 | sizeof(input))) |
1367 | return -EFAULT; | |
42a74f20 | 1368 | |
e145b35b | 1369 | return ext4_ioctl_group_add(filp, &input); |
ac27a0ec DK |
1370 | } |
1371 | ||
c14c6fd5 | 1372 | case EXT4_IOC_MIGRATE: |
2a43a878 AK |
1373 | { |
1374 | int err; | |
14f3db55 | 1375 | if (!inode_owner_or_capable(mnt_userns, inode)) |
2a43a878 AK |
1376 | return -EACCES; |
1377 | ||
a561be71 | 1378 | err = mnt_want_write_file(filp); |
2a43a878 AK |
1379 | if (err) |
1380 | return err; | |
1381 | /* | |
1382 | * inode_mutex prevent write and truncate on the file. | |
1383 | * Read still goes through. We take i_data_sem in | |
1384 | * ext4_ext_swap_inode_data before we switch the | |
1385 | * inode format to prevent read. | |
1386 | */ | |
5955102c | 1387 | inode_lock((inode)); |
2a43a878 | 1388 | err = ext4_ext_migrate(inode); |
5955102c | 1389 | inode_unlock((inode)); |
2a79f17e | 1390 | mnt_drop_write_file(filp); |
2a43a878 AK |
1391 | return err; |
1392 | } | |
c14c6fd5 | 1393 | |
ccd2506b TT |
1394 | case EXT4_IOC_ALLOC_DA_BLKS: |
1395 | { | |
1396 | int err; | |
14f3db55 | 1397 | if (!inode_owner_or_capable(mnt_userns, inode)) |
ccd2506b TT |
1398 | return -EACCES; |
1399 | ||
a561be71 | 1400 | err = mnt_want_write_file(filp); |
ccd2506b TT |
1401 | if (err) |
1402 | return err; | |
1403 | err = ext4_alloc_da_blocks(inode); | |
2a79f17e | 1404 | mnt_drop_write_file(filp); |
ccd2506b TT |
1405 | return err; |
1406 | } | |
1407 | ||
393d1d1d | 1408 | case EXT4_IOC_SWAP_BOOT: |
3e67cfad DM |
1409 | { |
1410 | int err; | |
393d1d1d DTB |
1411 | if (!(filp->f_mode & FMODE_WRITE)) |
1412 | return -EBADF; | |
3e67cfad DM |
1413 | err = mnt_want_write_file(filp); |
1414 | if (err) | |
1415 | return err; | |
14f3db55 | 1416 | err = swap_inode_boot_loader(sb, mnt_userns, inode); |
3e67cfad DM |
1417 | mnt_drop_write_file(filp); |
1418 | return err; | |
1419 | } | |
393d1d1d | 1420 | |
19c5246d YY |
1421 | case EXT4_IOC_RESIZE_FS: { |
1422 | ext4_fsblk_t n_blocks_count; | |
19c5246d | 1423 | int err = 0, err2 = 0; |
7f511862 | 1424 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
19c5246d | 1425 | |
19c5246d YY |
1426 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
1427 | sizeof(__u64))) { | |
1428 | return -EFAULT; | |
1429 | } | |
1430 | ||
19c5246d YY |
1431 | err = ext4_resize_begin(sb); |
1432 | if (err) | |
1433 | return err; | |
1434 | ||
8cae6f71 | 1435 | err = mnt_want_write_file(filp); |
19c5246d YY |
1436 | if (err) |
1437 | goto resizefs_out; | |
1438 | ||
1439 | err = ext4_resize_fs(sb, n_blocks_count); | |
1440 | if (EXT4_SB(sb)->s_journal) { | |
e85c81ba | 1441 | ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL); |
19c5246d | 1442 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
01d5d965 | 1443 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); |
19c5246d YY |
1444 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
1445 | } | |
1446 | if (err == 0) | |
1447 | err = err2; | |
8cae6f71 | 1448 | mnt_drop_write_file(filp); |
310a997f | 1449 | if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && |
7f511862 TT |
1450 | ext4_has_group_desc_csum(sb) && |
1451 | test_opt(sb, INIT_INODE_TABLE)) | |
1452 | err = ext4_register_li_request(sb, o_group); | |
1453 | ||
19c5246d | 1454 | resizefs_out: |
827891a3 TT |
1455 | err2 = ext4_resize_end(sb, true); |
1456 | if (err == 0) | |
1457 | err = err2; | |
19c5246d YY |
1458 | return err; |
1459 | } | |
1460 | ||
e681c047 LC |
1461 | case FITRIM: |
1462 | { | |
e681c047 LC |
1463 | struct fstrim_range range; |
1464 | int ret = 0; | |
1465 | ||
1466 | if (!capable(CAP_SYS_ADMIN)) | |
1467 | return -EPERM; | |
1468 | ||
70200574 | 1469 | if (!bdev_max_discard_sectors(sb->s_bdev)) |
41431792 LC |
1470 | return -EOPNOTSUPP; |
1471 | ||
18915b58 DW |
1472 | /* |
1473 | * We haven't replayed the journal, so we cannot use our | |
1474 | * block-bitmap-guided storage zapping commands. | |
1475 | */ | |
1476 | if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) | |
1477 | return -EROFS; | |
1478 | ||
e6705f7c | 1479 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
e681c047 LC |
1480 | sizeof(range))) |
1481 | return -EFAULT; | |
1482 | ||
1483 | ret = ext4_trim_fs(sb, &range); | |
1484 | if (ret < 0) | |
1485 | return ret; | |
1486 | ||
e6705f7c | 1487 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
e681c047 LC |
1488 | sizeof(range))) |
1489 | return -EFAULT; | |
1490 | ||
1491 | return 0; | |
1492 | } | |
7869a4a6 TT |
1493 | case EXT4_IOC_PRECACHE_EXTENTS: |
1494 | return ext4_ext_precache(inode); | |
9bd8212f | 1495 | |
cb29a02d | 1496 | case FS_IOC_SET_ENCRYPTION_POLICY: |
9a200d07 RW |
1497 | if (!ext4_has_feature_encrypt(sb)) |
1498 | return -EOPNOTSUPP; | |
db717d8e | 1499 | return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); |
9a200d07 | 1500 | |
72f63f4a RH |
1501 | case FS_IOC_GET_ENCRYPTION_PWSALT: |
1502 | return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg); | |
9bd8212f | 1503 | |
cb29a02d | 1504 | case FS_IOC_GET_ENCRYPTION_POLICY: |
0642ea24 CY |
1505 | if (!ext4_has_feature_encrypt(sb)) |
1506 | return -EOPNOTSUPP; | |
db717d8e | 1507 | return fscrypt_ioctl_get_policy(filp, (void __user *)arg); |
9bd8212f | 1508 | |
29b3692e EB |
1509 | case FS_IOC_GET_ENCRYPTION_POLICY_EX: |
1510 | if (!ext4_has_feature_encrypt(sb)) | |
1511 | return -EOPNOTSUPP; | |
1512 | return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); | |
1513 | ||
1514 | case FS_IOC_ADD_ENCRYPTION_KEY: | |
1515 | if (!ext4_has_feature_encrypt(sb)) | |
1516 | return -EOPNOTSUPP; | |
1517 | return fscrypt_ioctl_add_key(filp, (void __user *)arg); | |
1518 | ||
1519 | case FS_IOC_REMOVE_ENCRYPTION_KEY: | |
1520 | if (!ext4_has_feature_encrypt(sb)) | |
1521 | return -EOPNOTSUPP; | |
1522 | return fscrypt_ioctl_remove_key(filp, (void __user *)arg); | |
1523 | ||
1524 | case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: | |
1525 | if (!ext4_has_feature_encrypt(sb)) | |
1526 | return -EOPNOTSUPP; | |
1527 | return fscrypt_ioctl_remove_key_all_users(filp, | |
1528 | (void __user *)arg); | |
1529 | case FS_IOC_GET_ENCRYPTION_KEY_STATUS: | |
1530 | if (!ext4_has_feature_encrypt(sb)) | |
1531 | return -EOPNOTSUPP; | |
1532 | return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); | |
1533 | ||
7ec9f3b4 EB |
1534 | case FS_IOC_GET_ENCRYPTION_NONCE: |
1535 | if (!ext4_has_feature_encrypt(sb)) | |
1536 | return -EOPNOTSUPP; | |
1537 | return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); | |
1538 | ||
b0c013e2 TT |
1539 | case EXT4_IOC_CLEAR_ES_CACHE: |
1540 | { | |
14f3db55 | 1541 | if (!inode_owner_or_capable(mnt_userns, inode)) |
b0c013e2 TT |
1542 | return -EACCES; |
1543 | ext4_clear_inode_es(inode); | |
1544 | return 0; | |
1545 | } | |
1546 | ||
1ad3ea6e TT |
1547 | case EXT4_IOC_GETSTATE: |
1548 | { | |
1549 | __u32 state = 0; | |
1550 | ||
1551 | if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED)) | |
1552 | state |= EXT4_STATE_FLAG_EXT_PRECACHED; | |
1553 | if (ext4_test_inode_state(inode, EXT4_STATE_NEW)) | |
1554 | state |= EXT4_STATE_FLAG_NEW; | |
1555 | if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) | |
1556 | state |= EXT4_STATE_FLAG_NEWENTRY; | |
1557 | if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) | |
1558 | state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE; | |
1559 | ||
1560 | return put_user(state, (__u32 __user *) arg); | |
1561 | } | |
1562 | ||
bb5835ed TT |
1563 | case EXT4_IOC_GET_ES_CACHE: |
1564 | return ext4_ioctl_get_es_cache(filp, arg); | |
1565 | ||
e9be2ac7 TT |
1566 | case EXT4_IOC_SHUTDOWN: |
1567 | return ext4_shutdown(sb, arg); | |
c93d8f88 EB |
1568 | |
1569 | case FS_IOC_ENABLE_VERITY: | |
1570 | if (!ext4_has_feature_verity(sb)) | |
1571 | return -EOPNOTSUPP; | |
1572 | return fsverity_ioctl_enable(filp, (const void __user *)arg); | |
1573 | ||
1574 | case FS_IOC_MEASURE_VERITY: | |
1575 | if (!ext4_has_feature_verity(sb)) | |
1576 | return -EOPNOTSUPP; | |
1577 | return fsverity_ioctl_measure(filp, (void __user *)arg); | |
1578 | ||
e17fe657 EB |
1579 | case FS_IOC_READ_VERITY_METADATA: |
1580 | if (!ext4_has_feature_verity(sb)) | |
1581 | return -EOPNOTSUPP; | |
1582 | return fsverity_ioctl_read_metadata(filp, | |
1583 | (const void __user *)arg); | |
1584 | ||
351a0a3f LR |
1585 | case EXT4_IOC_CHECKPOINT: |
1586 | return ext4_ioctl_checkpoint(filp, arg); | |
1587 | ||
bbc605cd LC |
1588 | case FS_IOC_GETFSLABEL: |
1589 | return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg); | |
1590 | ||
1591 | case FS_IOC_SETFSLABEL: | |
1592 | return ext4_ioctl_setlabel(filp, | |
1593 | (const void __user *)arg); | |
1594 | ||
d95efb14 JB |
1595 | case EXT4_IOC_GETFSUUID: |
1596 | return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg); | |
1597 | case EXT4_IOC_SETFSUUID: | |
1598 | return ext4_ioctl_setuuid(filp, (const void __user *)arg); | |
ac27a0ec DK |
1599 | default: |
1600 | return -ENOTTY; | |
1601 | } | |
1602 | } | |
1603 | ||
aa75f4d3 HS |
1604 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1605 | { | |
2729cfdc | 1606 | return __ext4_ioctl(filp, cmd, arg); |
aa75f4d3 HS |
1607 | } |
1608 | ||
ac27a0ec | 1609 | #ifdef CONFIG_COMPAT |
617ba13b | 1610 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ac27a0ec | 1611 | { |
ac27a0ec DK |
1612 | /* These are just misnamed, they actually get/put from/to user an int */ |
1613 | switch (cmd) { | |
617ba13b MC |
1614 | case EXT4_IOC32_GETVERSION: |
1615 | cmd = EXT4_IOC_GETVERSION; | |
ac27a0ec | 1616 | break; |
617ba13b MC |
1617 | case EXT4_IOC32_SETVERSION: |
1618 | cmd = EXT4_IOC_SETVERSION; | |
ac27a0ec | 1619 | break; |
617ba13b MC |
1620 | case EXT4_IOC32_GROUP_EXTEND: |
1621 | cmd = EXT4_IOC_GROUP_EXTEND; | |
ac27a0ec | 1622 | break; |
617ba13b MC |
1623 | case EXT4_IOC32_GETVERSION_OLD: |
1624 | cmd = EXT4_IOC_GETVERSION_OLD; | |
ac27a0ec | 1625 | break; |
617ba13b MC |
1626 | case EXT4_IOC32_SETVERSION_OLD: |
1627 | cmd = EXT4_IOC_SETVERSION_OLD; | |
ac27a0ec | 1628 | break; |
617ba13b MC |
1629 | case EXT4_IOC32_GETRSVSZ: |
1630 | cmd = EXT4_IOC_GETRSVSZ; | |
ac27a0ec | 1631 | break; |
617ba13b MC |
1632 | case EXT4_IOC32_SETRSVSZ: |
1633 | cmd = EXT4_IOC_SETRSVSZ; | |
ac27a0ec | 1634 | break; |
4d92dc0f BH |
1635 | case EXT4_IOC32_GROUP_ADD: { |
1636 | struct compat_ext4_new_group_input __user *uinput; | |
e145b35b | 1637 | struct ext4_new_group_data input; |
4d92dc0f BH |
1638 | int err; |
1639 | ||
1640 | uinput = compat_ptr(arg); | |
1641 | err = get_user(input.group, &uinput->group); | |
1642 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); | |
1643 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); | |
1644 | err |= get_user(input.inode_table, &uinput->inode_table); | |
1645 | err |= get_user(input.blocks_count, &uinput->blocks_count); | |
1646 | err |= get_user(input.reserved_blocks, | |
1647 | &uinput->reserved_blocks); | |
1648 | if (err) | |
1649 | return -EFAULT; | |
e145b35b | 1650 | return ext4_ioctl_group_add(file, &input); |
4d92dc0f | 1651 | } |
b684b2ee | 1652 | case EXT4_IOC_MOVE_EXT: |
19c5246d | 1653 | case EXT4_IOC_RESIZE_FS: |
314999dc | 1654 | case FITRIM: |
7869a4a6 | 1655 | case EXT4_IOC_PRECACHE_EXTENTS: |
cb29a02d EB |
1656 | case FS_IOC_SET_ENCRYPTION_POLICY: |
1657 | case FS_IOC_GET_ENCRYPTION_PWSALT: | |
1658 | case FS_IOC_GET_ENCRYPTION_POLICY: | |
29b3692e EB |
1659 | case FS_IOC_GET_ENCRYPTION_POLICY_EX: |
1660 | case FS_IOC_ADD_ENCRYPTION_KEY: | |
1661 | case FS_IOC_REMOVE_ENCRYPTION_KEY: | |
1662 | case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: | |
1663 | case FS_IOC_GET_ENCRYPTION_KEY_STATUS: | |
7ec9f3b4 | 1664 | case FS_IOC_GET_ENCRYPTION_NONCE: |
e9be2ac7 | 1665 | case EXT4_IOC_SHUTDOWN: |
0c9ec4be | 1666 | case FS_IOC_GETFSMAP: |
c93d8f88 EB |
1667 | case FS_IOC_ENABLE_VERITY: |
1668 | case FS_IOC_MEASURE_VERITY: | |
e17fe657 | 1669 | case FS_IOC_READ_VERITY_METADATA: |
b0c013e2 | 1670 | case EXT4_IOC_CLEAR_ES_CACHE: |
1ad3ea6e | 1671 | case EXT4_IOC_GETSTATE: |
bb5835ed | 1672 | case EXT4_IOC_GET_ES_CACHE: |
351a0a3f | 1673 | case EXT4_IOC_CHECKPOINT: |
bbc605cd LC |
1674 | case FS_IOC_GETFSLABEL: |
1675 | case FS_IOC_SETFSLABEL: | |
d95efb14 JB |
1676 | case EXT4_IOC_GETFSUUID: |
1677 | case EXT4_IOC_SETFSUUID: | |
b684b2ee | 1678 | break; |
ac27a0ec DK |
1679 | default: |
1680 | return -ENOIOCTLCMD; | |
1681 | } | |
5cdd7b2d | 1682 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
ac27a0ec DK |
1683 | } |
1684 | #endif | |
eb705421 TT |
1685 | |
1686 | static void set_overhead(struct ext4_super_block *es, const void *arg) | |
1687 | { | |
1688 | es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg)); | |
1689 | } | |
1690 | ||
827891a3 | 1691 | int ext4_update_overhead(struct super_block *sb, bool force) |
eb705421 TT |
1692 | { |
1693 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1694 | ||
827891a3 TT |
1695 | if (sb_rdonly(sb)) |
1696 | return 0; | |
1697 | if (!force && | |
1698 | (sbi->s_overhead == 0 || | |
1699 | sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters))) | |
eb705421 | 1700 | return 0; |
eb705421 TT |
1701 | return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead); |
1702 | } |