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11#include <linux/fs.h>
12#include <linux/capability.h>
13#include <linux/time.h>
14#include <linux/compat.h>
15#include <linux/mount.h>
16#include <linux/file.h>
17#include <linux/quotaops.h>
18#include <linux/random.h>
19#include <linux/uuid.h>
20#include <linux/uaccess.h>
21#include <linux/delay.h>
22#include <linux/iversion.h>
23#include "ext4_jbd2.h"
24#include "ext4.h"
25#include <linux/fsmap.h>
26#include "fsmap.h"
27#include <trace/events/ext4.h>
28
29
30
31
32
33
34
35
36
37static void memswap(void *a, void *b, size_t len)
38{
39 unsigned char *ap, *bp;
40
41 ap = (unsigned char *)a;
42 bp = (unsigned char *)b;
43 while (len-- > 0) {
44 swap(*ap, *bp);
45 ap++;
46 bp++;
47 }
48}
49
50
51
52
53
54
55
56
57
58
59
60
61static void swap_inode_data(struct inode *inode1, struct inode *inode2)
62{
63 loff_t isize;
64 struct ext4_inode_info *ei1;
65 struct ext4_inode_info *ei2;
66 unsigned long tmp;
67
68 ei1 = EXT4_I(inode1);
69 ei2 = EXT4_I(inode2);
70
71 swap(inode1->i_version, inode2->i_version);
72 swap(inode1->i_atime, inode2->i_atime);
73 swap(inode1->i_mtime, inode2->i_mtime);
74
75 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
76 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
77 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
78 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
79 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
80 swap(ei1->i_disksize, ei2->i_disksize);
81 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
82 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
83
84 isize = i_size_read(inode1);
85 i_size_write(inode1, i_size_read(inode2));
86 i_size_write(inode2, isize);
87}
88
89static void reset_inode_seed(struct inode *inode)
90{
91 struct ext4_inode_info *ei = EXT4_I(inode);
92 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
93 __le32 inum = cpu_to_le32(inode->i_ino);
94 __le32 gen = cpu_to_le32(inode->i_generation);
95 __u32 csum;
96
97 if (!ext4_has_metadata_csum(inode->i_sb))
98 return;
99
100 csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
101 ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
102}
103
104
105
106
107
108
109
110
111
112
113static long swap_inode_boot_loader(struct super_block *sb,
114 struct inode *inode)
115{
116 handle_t *handle;
117 int err;
118 struct inode *inode_bl;
119 struct ext4_inode_info *ei_bl;
120 qsize_t size, size_bl, diff;
121 blkcnt_t blocks;
122 unsigned short bytes;
123
124 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
125 if (IS_ERR(inode_bl))
126 return PTR_ERR(inode_bl);
127 ei_bl = EXT4_I(inode_bl);
128
129
130
131 lock_two_nondirectories(inode, inode_bl);
132
133 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
134 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
135 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
136 ext4_has_inline_data(inode)) {
137 err = -EINVAL;
138 goto journal_err_out;
139 }
140
141 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
142 !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
143 err = -EPERM;
144 goto journal_err_out;
145 }
146
147 down_write(&EXT4_I(inode)->i_mmap_sem);
148 err = filemap_write_and_wait(inode->i_mapping);
149 if (err)
150 goto err_out;
151
152 err = filemap_write_and_wait(inode_bl->i_mapping);
153 if (err)
154 goto err_out;
155
156
157 inode_dio_wait(inode);
158 inode_dio_wait(inode_bl);
159
160 truncate_inode_pages(&inode->i_data, 0);
161 truncate_inode_pages(&inode_bl->i_data, 0);
162
163 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
164 if (IS_ERR(handle)) {
165 err = -EINVAL;
166 goto err_out;
167 }
168
169
170 ext4_double_down_write_data_sem(inode, inode_bl);
171
172 if (inode_bl->i_nlink == 0) {
173
174 set_nlink(inode_bl, 1);
175 i_uid_write(inode_bl, 0);
176 i_gid_write(inode_bl, 0);
177 inode_bl->i_flags = 0;
178 ei_bl->i_flags = 0;
179 inode_set_iversion(inode_bl, 1);
180 i_size_write(inode_bl, 0);
181 inode_bl->i_mode = S_IFREG;
182 if (ext4_has_feature_extents(sb)) {
183 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
184 ext4_ext_tree_init(handle, inode_bl);
185 } else
186 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
187 }
188
189 err = dquot_initialize(inode);
190 if (err)
191 goto err_out1;
192
193 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
194 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
195 diff = size - size_bl;
196 swap_inode_data(inode, inode_bl);
197
198 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
199
200 inode->i_generation = prandom_u32();
201 inode_bl->i_generation = prandom_u32();
202 reset_inode_seed(inode);
203 reset_inode_seed(inode_bl);
204
205 ext4_discard_preallocations(inode);
206
207 err = ext4_mark_inode_dirty(handle, inode);
208 if (err < 0) {
209
210 ext4_warning(inode->i_sb,
211 "couldn't mark inode #%lu dirty (err %d)",
212 inode->i_ino, err);
213
214 swap_inode_data(inode, inode_bl);
215 ext4_mark_inode_dirty(handle, inode);
216 goto err_out1;
217 }
218
219 blocks = inode_bl->i_blocks;
220 bytes = inode_bl->i_bytes;
221 inode_bl->i_blocks = inode->i_blocks;
222 inode_bl->i_bytes = inode->i_bytes;
223 err = ext4_mark_inode_dirty(handle, inode_bl);
224 if (err < 0) {
225
226 ext4_warning(inode_bl->i_sb,
227 "couldn't mark inode #%lu dirty (err %d)",
228 inode_bl->i_ino, err);
229 goto revert;
230 }
231
232
233 if (diff > 0)
234 dquot_free_space(inode, diff);
235 else
236 err = dquot_alloc_space(inode, -1 * diff);
237
238 if (err < 0) {
239revert:
240
241 inode_bl->i_blocks = blocks;
242 inode_bl->i_bytes = bytes;
243 swap_inode_data(inode, inode_bl);
244 ext4_mark_inode_dirty(handle, inode);
245 ext4_mark_inode_dirty(handle, inode_bl);
246 }
247
248err_out1:
249 ext4_journal_stop(handle);
250 ext4_double_up_write_data_sem(inode, inode_bl);
251
252err_out:
253 up_write(&EXT4_I(inode)->i_mmap_sem);
254journal_err_out:
255 unlock_two_nondirectories(inode, inode_bl);
256 iput(inode_bl);
257 return err;
258}
259
260#ifdef CONFIG_FS_ENCRYPTION
261static int uuid_is_zero(__u8 u[16])
262{
263 int i;
264
265 for (i = 0; i < 16; i++)
266 if (u[i])
267 return 0;
268 return 1;
269}
270#endif
271
272
273
274
275
276
277static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
278 unsigned int flags)
279{
280 struct ext4_inode_info *ei = EXT4_I(inode);
281 unsigned int oldflags = ei->i_flags;
282
283 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
284 return 0;
285
286 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
287 return -EPERM;
288 if (ext4_has_feature_project(inode->i_sb) &&
289 __kprojid_val(ei->i_projid) != new_projid)
290 return -EPERM;
291
292 return 0;
293}
294
295static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
296{
297 struct ext4_inode_info *ei = EXT4_I(inode);
298
299 if (S_ISDIR(inode->i_mode))
300 return;
301
302 if (test_opt2(inode->i_sb, DAX_NEVER) ||
303 test_opt(inode->i_sb, DAX_ALWAYS))
304 return;
305
306 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
307 d_mark_dontcache(inode);
308}
309
310static bool dax_compatible(struct inode *inode, unsigned int oldflags,
311 unsigned int flags)
312{
313 if (flags & EXT4_DAX_FL) {
314 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
315 ext4_test_inode_state(inode,
316 EXT4_STATE_VERITY_IN_PROGRESS)) {
317 return false;
318 }
319 }
320
321 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
322 return false;
323
324 return true;
325}
326
327static int ext4_ioctl_setflags(struct inode *inode,
328 unsigned int flags)
329{
330 struct ext4_inode_info *ei = EXT4_I(inode);
331 handle_t *handle = NULL;
332 int err = -EPERM, migrate = 0;
333 struct ext4_iloc iloc;
334 unsigned int oldflags, mask, i;
335 struct super_block *sb = inode->i_sb;
336
337
338 if (ext4_is_quota_file(inode))
339 goto flags_out;
340
341 oldflags = ei->i_flags;
342
343 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
344 if (err)
345 goto flags_out;
346
347
348
349
350
351 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
352 if (!capable(CAP_SYS_RESOURCE))
353 goto flags_out;
354 }
355
356 if (!dax_compatible(inode, oldflags, flags)) {
357 err = -EOPNOTSUPP;
358 goto flags_out;
359 }
360
361 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
362 migrate = 1;
363
364 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
365 if (!ext4_has_feature_casefold(sb)) {
366 err = -EOPNOTSUPP;
367 goto flags_out;
368 }
369
370 if (!S_ISDIR(inode->i_mode)) {
371 err = -ENOTDIR;
372 goto flags_out;
373 }
374
375 if (!ext4_empty_dir(inode)) {
376 err = -ENOTEMPTY;
377 goto flags_out;
378 }
379 }
380
381
382
383
384
385
386
387 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
388 (flags & EXT4_IMMUTABLE_FL)) {
389 inode_dio_wait(inode);
390 err = filemap_write_and_wait(inode->i_mapping);
391 if (err)
392 goto flags_out;
393 }
394
395 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
396 if (IS_ERR(handle)) {
397 err = PTR_ERR(handle);
398 goto flags_out;
399 }
400 if (IS_SYNC(inode))
401 ext4_handle_sync(handle);
402 err = ext4_reserve_inode_write(handle, inode, &iloc);
403 if (err)
404 goto flags_err;
405
406 ext4_dax_dontcache(inode, flags);
407
408 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
409 if (!(mask & EXT4_FL_USER_MODIFIABLE))
410 continue;
411
412 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
413 continue;
414 if (mask & flags)
415 ext4_set_inode_flag(inode, i);
416 else
417 ext4_clear_inode_flag(inode, i);
418 }
419
420 ext4_set_inode_flags(inode, false);
421
422 inode->i_ctime = current_time(inode);
423
424 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
425flags_err:
426 ext4_journal_stop(handle);
427 if (err)
428 goto flags_out;
429
430 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
431
432
433
434
435 if (IS_DAX(inode)) {
436 err = -EBUSY;
437 goto flags_out;
438 }
439
440 err = ext4_change_inode_journal_flag(inode,
441 flags & EXT4_JOURNAL_DATA_FL);
442 if (err)
443 goto flags_out;
444 }
445 if (migrate) {
446 if (flags & EXT4_EXTENTS_FL)
447 err = ext4_ext_migrate(inode);
448 else
449 err = ext4_ind_migrate(inode);
450 }
451
452flags_out:
453 return err;
454}
455
456#ifdef CONFIG_QUOTA
457static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
458{
459 struct inode *inode = file_inode(filp);
460 struct super_block *sb = inode->i_sb;
461 struct ext4_inode_info *ei = EXT4_I(inode);
462 int err, rc;
463 handle_t *handle;
464 kprojid_t kprojid;
465 struct ext4_iloc iloc;
466 struct ext4_inode *raw_inode;
467 struct dquot *transfer_to[MAXQUOTAS] = { };
468
469 if (!ext4_has_feature_project(sb)) {
470 if (projid != EXT4_DEF_PROJID)
471 return -EOPNOTSUPP;
472 else
473 return 0;
474 }
475
476 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
477 return -EOPNOTSUPP;
478
479 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
480
481 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
482 return 0;
483
484 err = -EPERM;
485
486 if (ext4_is_quota_file(inode))
487 return err;
488
489 err = ext4_get_inode_loc(inode, &iloc);
490 if (err)
491 return err;
492
493 raw_inode = ext4_raw_inode(&iloc);
494 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
495 err = ext4_expand_extra_isize(inode,
496 EXT4_SB(sb)->s_want_extra_isize,
497 &iloc);
498 if (err)
499 return err;
500 } else {
501 brelse(iloc.bh);
502 }
503
504 err = dquot_initialize(inode);
505 if (err)
506 return err;
507
508 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
509 EXT4_QUOTA_INIT_BLOCKS(sb) +
510 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
511 if (IS_ERR(handle))
512 return PTR_ERR(handle);
513
514 err = ext4_reserve_inode_write(handle, inode, &iloc);
515 if (err)
516 goto out_stop;
517
518 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
519 if (!IS_ERR(transfer_to[PRJQUOTA])) {
520
521
522
523
524 down_read(&EXT4_I(inode)->xattr_sem);
525 err = __dquot_transfer(inode, transfer_to);
526 up_read(&EXT4_I(inode)->xattr_sem);
527 dqput(transfer_to[PRJQUOTA]);
528 if (err)
529 goto out_dirty;
530 }
531
532 EXT4_I(inode)->i_projid = kprojid;
533 inode->i_ctime = current_time(inode);
534out_dirty:
535 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
536 if (!err)
537 err = rc;
538out_stop:
539 ext4_journal_stop(handle);
540 return err;
541}
542#else
543static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
544{
545 if (projid != EXT4_DEF_PROJID)
546 return -EOPNOTSUPP;
547 return 0;
548}
549#endif
550
551
552static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
553{
554 __u32 xflags = 0;
555
556 if (iflags & EXT4_SYNC_FL)
557 xflags |= FS_XFLAG_SYNC;
558 if (iflags & EXT4_IMMUTABLE_FL)
559 xflags |= FS_XFLAG_IMMUTABLE;
560 if (iflags & EXT4_APPEND_FL)
561 xflags |= FS_XFLAG_APPEND;
562 if (iflags & EXT4_NODUMP_FL)
563 xflags |= FS_XFLAG_NODUMP;
564 if (iflags & EXT4_NOATIME_FL)
565 xflags |= FS_XFLAG_NOATIME;
566 if (iflags & EXT4_PROJINHERIT_FL)
567 xflags |= FS_XFLAG_PROJINHERIT;
568 if (iflags & EXT4_DAX_FL)
569 xflags |= FS_XFLAG_DAX;
570 return xflags;
571}
572
573#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
574 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
575 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
576 FS_XFLAG_DAX)
577
578
579static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
580{
581 unsigned long iflags = 0;
582
583 if (xflags & FS_XFLAG_SYNC)
584 iflags |= EXT4_SYNC_FL;
585 if (xflags & FS_XFLAG_IMMUTABLE)
586 iflags |= EXT4_IMMUTABLE_FL;
587 if (xflags & FS_XFLAG_APPEND)
588 iflags |= EXT4_APPEND_FL;
589 if (xflags & FS_XFLAG_NODUMP)
590 iflags |= EXT4_NODUMP_FL;
591 if (xflags & FS_XFLAG_NOATIME)
592 iflags |= EXT4_NOATIME_FL;
593 if (xflags & FS_XFLAG_PROJINHERIT)
594 iflags |= EXT4_PROJINHERIT_FL;
595 if (xflags & FS_XFLAG_DAX)
596 iflags |= EXT4_DAX_FL;
597
598 return iflags;
599}
600
601static int ext4_shutdown(struct super_block *sb, unsigned long arg)
602{
603 struct ext4_sb_info *sbi = EXT4_SB(sb);
604 __u32 flags;
605
606 if (!capable(CAP_SYS_ADMIN))
607 return -EPERM;
608
609 if (get_user(flags, (__u32 __user *)arg))
610 return -EFAULT;
611
612 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
613 return -EINVAL;
614
615 if (ext4_forced_shutdown(sbi))
616 return 0;
617
618 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
619 trace_ext4_shutdown(sb, flags);
620
621 switch (flags) {
622 case EXT4_GOING_FLAGS_DEFAULT:
623 freeze_bdev(sb->s_bdev);
624 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
625 thaw_bdev(sb->s_bdev, sb);
626 break;
627 case EXT4_GOING_FLAGS_LOGFLUSH:
628 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
629 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
630 (void) ext4_force_commit(sb);
631 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
632 }
633 break;
634 case EXT4_GOING_FLAGS_NOLOGFLUSH:
635 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
636 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
637 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
638 break;
639 default:
640 return -EINVAL;
641 }
642 clear_opt(sb, DISCARD);
643 return 0;
644}
645
646struct getfsmap_info {
647 struct super_block *gi_sb;
648 struct fsmap_head __user *gi_data;
649 unsigned int gi_idx;
650 __u32 gi_last_flags;
651};
652
653static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
654{
655 struct getfsmap_info *info = priv;
656 struct fsmap fm;
657
658 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
659
660 info->gi_last_flags = xfm->fmr_flags;
661 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
662 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
663 sizeof(struct fsmap)))
664 return -EFAULT;
665
666 return 0;
667}
668
669static int ext4_ioc_getfsmap(struct super_block *sb,
670 struct fsmap_head __user *arg)
671{
672 struct getfsmap_info info = { NULL };
673 struct ext4_fsmap_head xhead = {0};
674 struct fsmap_head head;
675 bool aborted = false;
676 int error;
677
678 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
679 return -EFAULT;
680 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
681 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
682 sizeof(head.fmh_keys[0].fmr_reserved)) ||
683 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
684 sizeof(head.fmh_keys[1].fmr_reserved)))
685 return -EINVAL;
686
687
688
689
690 if (head.fmh_keys[0].fmr_offset ||
691 (head.fmh_keys[1].fmr_offset != 0 &&
692 head.fmh_keys[1].fmr_offset != -1ULL))
693 return -EINVAL;
694
695 xhead.fmh_iflags = head.fmh_iflags;
696 xhead.fmh_count = head.fmh_count;
697 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
698 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
699
700 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
701 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
702
703 info.gi_sb = sb;
704 info.gi_data = arg;
705 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
706 if (error == EXT4_QUERY_RANGE_ABORT) {
707 error = 0;
708 aborted = true;
709 } else if (error)
710 return error;
711
712
713 if (!aborted && info.gi_idx) {
714 info.gi_last_flags |= FMR_OF_LAST;
715 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
716 &info.gi_last_flags,
717 sizeof(info.gi_last_flags)))
718 return -EFAULT;
719 }
720
721
722 head.fmh_entries = xhead.fmh_entries;
723 head.fmh_oflags = xhead.fmh_oflags;
724 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
725 return -EFAULT;
726
727 return 0;
728}
729
730static long ext4_ioctl_group_add(struct file *file,
731 struct ext4_new_group_data *input)
732{
733 struct super_block *sb = file_inode(file)->i_sb;
734 int err, err2=0;
735
736 err = ext4_resize_begin(sb);
737 if (err)
738 return err;
739
740 if (ext4_has_feature_bigalloc(sb)) {
741 ext4_msg(sb, KERN_ERR,
742 "Online resizing not supported with bigalloc");
743 err = -EOPNOTSUPP;
744 goto group_add_out;
745 }
746
747 err = mnt_want_write_file(file);
748 if (err)
749 goto group_add_out;
750
751 err = ext4_group_add(sb, input);
752 if (EXT4_SB(sb)->s_journal) {
753 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
754 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
755 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
756 }
757 if (err == 0)
758 err = err2;
759 mnt_drop_write_file(file);
760 if (!err && ext4_has_group_desc_csum(sb) &&
761 test_opt(sb, INIT_INODE_TABLE))
762 err = ext4_register_li_request(sb, input->group);
763group_add_out:
764 ext4_resize_end(sb);
765 return err;
766}
767
768static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
769{
770 struct ext4_inode_info *ei = EXT4_I(inode);
771
772 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
773 EXT4_FL_USER_VISIBLE));
774
775 if (ext4_has_feature_project(inode->i_sb))
776 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
777}
778
779
780#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
781
782static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
783{
784 struct fiemap fiemap;
785 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
786 struct fiemap_extent_info fieinfo = { 0, };
787 struct inode *inode = file_inode(filp);
788 int error;
789
790 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
791 return -EFAULT;
792
793 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
794 return -EINVAL;
795
796 fieinfo.fi_flags = fiemap.fm_flags;
797 fieinfo.fi_extents_max = fiemap.fm_extent_count;
798 fieinfo.fi_extents_start = ufiemap->fm_extents;
799
800 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
801 fiemap.fm_length);
802 fiemap.fm_flags = fieinfo.fi_flags;
803 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
804 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
805 error = -EFAULT;
806
807 return error;
808}
809
810long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
811{
812 struct inode *inode = file_inode(filp);
813 struct super_block *sb = inode->i_sb;
814 struct ext4_inode_info *ei = EXT4_I(inode);
815 unsigned int flags;
816
817 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
818
819 switch (cmd) {
820 case FS_IOC_GETFSMAP:
821 return ext4_ioc_getfsmap(sb, (void __user *)arg);
822 case EXT4_IOC_GETFLAGS:
823 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
824 if (S_ISREG(inode->i_mode))
825 flags &= ~EXT4_PROJINHERIT_FL;
826 return put_user(flags, (int __user *) arg);
827 case EXT4_IOC_SETFLAGS: {
828 int err;
829
830 if (!inode_owner_or_capable(inode))
831 return -EACCES;
832
833 if (get_user(flags, (int __user *) arg))
834 return -EFAULT;
835
836 if (flags & ~EXT4_FL_USER_VISIBLE)
837 return -EOPNOTSUPP;
838
839
840
841
842
843
844 flags &= EXT4_FL_USER_MODIFIABLE;
845 if (ext4_mask_flags(inode->i_mode, flags) != flags)
846 return -EOPNOTSUPP;
847
848 err = mnt_want_write_file(filp);
849 if (err)
850 return err;
851
852 inode_lock(inode);
853 err = ext4_ioctl_check_immutable(inode,
854 from_kprojid(&init_user_ns, ei->i_projid),
855 flags);
856 if (!err)
857 err = ext4_ioctl_setflags(inode, flags);
858 inode_unlock(inode);
859 mnt_drop_write_file(filp);
860 return err;
861 }
862 case EXT4_IOC_GETVERSION:
863 case EXT4_IOC_GETVERSION_OLD:
864 return put_user(inode->i_generation, (int __user *) arg);
865 case EXT4_IOC_SETVERSION:
866 case EXT4_IOC_SETVERSION_OLD: {
867 handle_t *handle;
868 struct ext4_iloc iloc;
869 __u32 generation;
870 int err;
871
872 if (!inode_owner_or_capable(inode))
873 return -EPERM;
874
875 if (ext4_has_metadata_csum(inode->i_sb)) {
876 ext4_warning(sb, "Setting inode version is not "
877 "supported with metadata_csum enabled.");
878 return -ENOTTY;
879 }
880
881 err = mnt_want_write_file(filp);
882 if (err)
883 return err;
884 if (get_user(generation, (int __user *) arg)) {
885 err = -EFAULT;
886 goto setversion_out;
887 }
888
889 inode_lock(inode);
890 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
891 if (IS_ERR(handle)) {
892 err = PTR_ERR(handle);
893 goto unlock_out;
894 }
895 err = ext4_reserve_inode_write(handle, inode, &iloc);
896 if (err == 0) {
897 inode->i_ctime = current_time(inode);
898 inode->i_generation = generation;
899 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
900 }
901 ext4_journal_stop(handle);
902
903unlock_out:
904 inode_unlock(inode);
905setversion_out:
906 mnt_drop_write_file(filp);
907 return err;
908 }
909 case EXT4_IOC_GROUP_EXTEND: {
910 ext4_fsblk_t n_blocks_count;
911 int err, err2=0;
912
913 err = ext4_resize_begin(sb);
914 if (err)
915 return err;
916
917 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
918 err = -EFAULT;
919 goto group_extend_out;
920 }
921
922 if (ext4_has_feature_bigalloc(sb)) {
923 ext4_msg(sb, KERN_ERR,
924 "Online resizing not supported with bigalloc");
925 err = -EOPNOTSUPP;
926 goto group_extend_out;
927 }
928
929 err = mnt_want_write_file(filp);
930 if (err)
931 goto group_extend_out;
932
933 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
934 if (EXT4_SB(sb)->s_journal) {
935 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
936 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
937 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
938 }
939 if (err == 0)
940 err = err2;
941 mnt_drop_write_file(filp);
942group_extend_out:
943 ext4_resize_end(sb);
944 return err;
945 }
946
947 case EXT4_IOC_MOVE_EXT: {
948 struct move_extent me;
949 struct fd donor;
950 int err;
951
952 if (!(filp->f_mode & FMODE_READ) ||
953 !(filp->f_mode & FMODE_WRITE))
954 return -EBADF;
955
956 if (copy_from_user(&me,
957 (struct move_extent __user *)arg, sizeof(me)))
958 return -EFAULT;
959 me.moved_len = 0;
960
961 donor = fdget(me.donor_fd);
962 if (!donor.file)
963 return -EBADF;
964
965 if (!(donor.file->f_mode & FMODE_WRITE)) {
966 err = -EBADF;
967 goto mext_out;
968 }
969
970 if (ext4_has_feature_bigalloc(sb)) {
971 ext4_msg(sb, KERN_ERR,
972 "Online defrag not supported with bigalloc");
973 err = -EOPNOTSUPP;
974 goto mext_out;
975 } else if (IS_DAX(inode)) {
976 ext4_msg(sb, KERN_ERR,
977 "Online defrag not supported with DAX");
978 err = -EOPNOTSUPP;
979 goto mext_out;
980 }
981
982 err = mnt_want_write_file(filp);
983 if (err)
984 goto mext_out;
985
986 err = ext4_move_extents(filp, donor.file, me.orig_start,
987 me.donor_start, me.len, &me.moved_len);
988 mnt_drop_write_file(filp);
989
990 if (copy_to_user((struct move_extent __user *)arg,
991 &me, sizeof(me)))
992 err = -EFAULT;
993mext_out:
994 fdput(donor);
995 return err;
996 }
997
998 case EXT4_IOC_GROUP_ADD: {
999 struct ext4_new_group_data input;
1000
1001 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1002 sizeof(input)))
1003 return -EFAULT;
1004
1005 return ext4_ioctl_group_add(filp, &input);
1006 }
1007
1008 case EXT4_IOC_MIGRATE:
1009 {
1010 int err;
1011 if (!inode_owner_or_capable(inode))
1012 return -EACCES;
1013
1014 err = mnt_want_write_file(filp);
1015 if (err)
1016 return err;
1017
1018
1019
1020
1021
1022
1023 inode_lock((inode));
1024 err = ext4_ext_migrate(inode);
1025 inode_unlock((inode));
1026 mnt_drop_write_file(filp);
1027 return err;
1028 }
1029
1030 case EXT4_IOC_ALLOC_DA_BLKS:
1031 {
1032 int err;
1033 if (!inode_owner_or_capable(inode))
1034 return -EACCES;
1035
1036 err = mnt_want_write_file(filp);
1037 if (err)
1038 return err;
1039 err = ext4_alloc_da_blocks(inode);
1040 mnt_drop_write_file(filp);
1041 return err;
1042 }
1043
1044 case EXT4_IOC_SWAP_BOOT:
1045 {
1046 int err;
1047 if (!(filp->f_mode & FMODE_WRITE))
1048 return -EBADF;
1049 err = mnt_want_write_file(filp);
1050 if (err)
1051 return err;
1052 err = swap_inode_boot_loader(sb, inode);
1053 mnt_drop_write_file(filp);
1054 return err;
1055 }
1056
1057 case EXT4_IOC_RESIZE_FS: {
1058 ext4_fsblk_t n_blocks_count;
1059 int err = 0, err2 = 0;
1060 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1061
1062 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1063 sizeof(__u64))) {
1064 return -EFAULT;
1065 }
1066
1067 err = ext4_resize_begin(sb);
1068 if (err)
1069 return err;
1070
1071 err = mnt_want_write_file(filp);
1072 if (err)
1073 goto resizefs_out;
1074
1075 err = ext4_resize_fs(sb, n_blocks_count);
1076 if (EXT4_SB(sb)->s_journal) {
1077 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1078 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1079 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1080 }
1081 if (err == 0)
1082 err = err2;
1083 mnt_drop_write_file(filp);
1084 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1085 ext4_has_group_desc_csum(sb) &&
1086 test_opt(sb, INIT_INODE_TABLE))
1087 err = ext4_register_li_request(sb, o_group);
1088
1089resizefs_out:
1090 ext4_resize_end(sb);
1091 return err;
1092 }
1093
1094 case FITRIM:
1095 {
1096 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1097 struct fstrim_range range;
1098 int ret = 0;
1099
1100 if (!capable(CAP_SYS_ADMIN))
1101 return -EPERM;
1102
1103 if (!blk_queue_discard(q))
1104 return -EOPNOTSUPP;
1105
1106
1107
1108
1109
1110 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1111 return -EROFS;
1112
1113 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1114 sizeof(range)))
1115 return -EFAULT;
1116
1117 range.minlen = max((unsigned int)range.minlen,
1118 q->limits.discard_granularity);
1119 ret = ext4_trim_fs(sb, &range);
1120 if (ret < 0)
1121 return ret;
1122
1123 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1124 sizeof(range)))
1125 return -EFAULT;
1126
1127 return 0;
1128 }
1129 case EXT4_IOC_PRECACHE_EXTENTS:
1130 return ext4_ext_precache(inode);
1131
1132 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1133 if (!ext4_has_feature_encrypt(sb))
1134 return -EOPNOTSUPP;
1135 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1136
1137 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
1138#ifdef CONFIG_FS_ENCRYPTION
1139 int err, err2;
1140 struct ext4_sb_info *sbi = EXT4_SB(sb);
1141 handle_t *handle;
1142
1143 if (!ext4_has_feature_encrypt(sb))
1144 return -EOPNOTSUPP;
1145 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1146 err = mnt_want_write_file(filp);
1147 if (err)
1148 return err;
1149 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1150 if (IS_ERR(handle)) {
1151 err = PTR_ERR(handle);
1152 goto pwsalt_err_exit;
1153 }
1154 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1155 if (err)
1156 goto pwsalt_err_journal;
1157 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1158 err = ext4_handle_dirty_metadata(handle, NULL,
1159 sbi->s_sbh);
1160 pwsalt_err_journal:
1161 err2 = ext4_journal_stop(handle);
1162 if (err2 && !err)
1163 err = err2;
1164 pwsalt_err_exit:
1165 mnt_drop_write_file(filp);
1166 if (err)
1167 return err;
1168 }
1169 if (copy_to_user((void __user *) arg,
1170 sbi->s_es->s_encrypt_pw_salt, 16))
1171 return -EFAULT;
1172 return 0;
1173#else
1174 return -EOPNOTSUPP;
1175#endif
1176 }
1177 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1178 if (!ext4_has_feature_encrypt(sb))
1179 return -EOPNOTSUPP;
1180 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1181
1182 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1183 if (!ext4_has_feature_encrypt(sb))
1184 return -EOPNOTSUPP;
1185 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1186
1187 case FS_IOC_ADD_ENCRYPTION_KEY:
1188 if (!ext4_has_feature_encrypt(sb))
1189 return -EOPNOTSUPP;
1190 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1191
1192 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1193 if (!ext4_has_feature_encrypt(sb))
1194 return -EOPNOTSUPP;
1195 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1196
1197 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1198 if (!ext4_has_feature_encrypt(sb))
1199 return -EOPNOTSUPP;
1200 return fscrypt_ioctl_remove_key_all_users(filp,
1201 (void __user *)arg);
1202 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1203 if (!ext4_has_feature_encrypt(sb))
1204 return -EOPNOTSUPP;
1205 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1206
1207 case FS_IOC_GET_ENCRYPTION_NONCE:
1208 if (!ext4_has_feature_encrypt(sb))
1209 return -EOPNOTSUPP;
1210 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1211
1212 case EXT4_IOC_CLEAR_ES_CACHE:
1213 {
1214 if (!inode_owner_or_capable(inode))
1215 return -EACCES;
1216 ext4_clear_inode_es(inode);
1217 return 0;
1218 }
1219
1220 case EXT4_IOC_GETSTATE:
1221 {
1222 __u32 state = 0;
1223
1224 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1225 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1226 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1227 state |= EXT4_STATE_FLAG_NEW;
1228 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1229 state |= EXT4_STATE_FLAG_NEWENTRY;
1230 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1231 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1232
1233 return put_user(state, (__u32 __user *) arg);
1234 }
1235
1236 case EXT4_IOC_GET_ES_CACHE:
1237 return ext4_ioctl_get_es_cache(filp, arg);
1238
1239 case EXT4_IOC_FSGETXATTR:
1240 {
1241 struct fsxattr fa;
1242
1243 ext4_fill_fsxattr(inode, &fa);
1244
1245 if (copy_to_user((struct fsxattr __user *)arg,
1246 &fa, sizeof(fa)))
1247 return -EFAULT;
1248 return 0;
1249 }
1250 case EXT4_IOC_FSSETXATTR:
1251 {
1252 struct fsxattr fa, old_fa;
1253 int err;
1254
1255 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1256 sizeof(fa)))
1257 return -EFAULT;
1258
1259
1260 if (!inode_owner_or_capable(inode))
1261 return -EACCES;
1262
1263 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1264 return -EOPNOTSUPP;
1265
1266 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1267 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1268 return -EOPNOTSUPP;
1269
1270 err = mnt_want_write_file(filp);
1271 if (err)
1272 return err;
1273
1274 inode_lock(inode);
1275 ext4_fill_fsxattr(inode, &old_fa);
1276 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1277 if (err)
1278 goto out;
1279 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1280 (flags & EXT4_FL_XFLAG_VISIBLE);
1281 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1282 if (err)
1283 goto out;
1284 err = ext4_ioctl_setflags(inode, flags);
1285 if (err)
1286 goto out;
1287 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1288out:
1289 inode_unlock(inode);
1290 mnt_drop_write_file(filp);
1291 return err;
1292 }
1293 case EXT4_IOC_SHUTDOWN:
1294 return ext4_shutdown(sb, arg);
1295
1296 case FS_IOC_ENABLE_VERITY:
1297 if (!ext4_has_feature_verity(sb))
1298 return -EOPNOTSUPP;
1299 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1300
1301 case FS_IOC_MEASURE_VERITY:
1302 if (!ext4_has_feature_verity(sb))
1303 return -EOPNOTSUPP;
1304 return fsverity_ioctl_measure(filp, (void __user *)arg);
1305
1306 default:
1307 return -ENOTTY;
1308 }
1309}
1310
1311#ifdef CONFIG_COMPAT
1312long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1313{
1314
1315 switch (cmd) {
1316 case EXT4_IOC32_GETFLAGS:
1317 cmd = EXT4_IOC_GETFLAGS;
1318 break;
1319 case EXT4_IOC32_SETFLAGS:
1320 cmd = EXT4_IOC_SETFLAGS;
1321 break;
1322 case EXT4_IOC32_GETVERSION:
1323 cmd = EXT4_IOC_GETVERSION;
1324 break;
1325 case EXT4_IOC32_SETVERSION:
1326 cmd = EXT4_IOC_SETVERSION;
1327 break;
1328 case EXT4_IOC32_GROUP_EXTEND:
1329 cmd = EXT4_IOC_GROUP_EXTEND;
1330 break;
1331 case EXT4_IOC32_GETVERSION_OLD:
1332 cmd = EXT4_IOC_GETVERSION_OLD;
1333 break;
1334 case EXT4_IOC32_SETVERSION_OLD:
1335 cmd = EXT4_IOC_SETVERSION_OLD;
1336 break;
1337 case EXT4_IOC32_GETRSVSZ:
1338 cmd = EXT4_IOC_GETRSVSZ;
1339 break;
1340 case EXT4_IOC32_SETRSVSZ:
1341 cmd = EXT4_IOC_SETRSVSZ;
1342 break;
1343 case EXT4_IOC32_GROUP_ADD: {
1344 struct compat_ext4_new_group_input __user *uinput;
1345 struct ext4_new_group_data input;
1346 int err;
1347
1348 uinput = compat_ptr(arg);
1349 err = get_user(input.group, &uinput->group);
1350 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1351 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1352 err |= get_user(input.inode_table, &uinput->inode_table);
1353 err |= get_user(input.blocks_count, &uinput->blocks_count);
1354 err |= get_user(input.reserved_blocks,
1355 &uinput->reserved_blocks);
1356 if (err)
1357 return -EFAULT;
1358 return ext4_ioctl_group_add(file, &input);
1359 }
1360 case EXT4_IOC_MOVE_EXT:
1361 case EXT4_IOC_RESIZE_FS:
1362 case FITRIM:
1363 case EXT4_IOC_PRECACHE_EXTENTS:
1364 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1365 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1366 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1367 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1368 case FS_IOC_ADD_ENCRYPTION_KEY:
1369 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1370 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1371 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1372 case FS_IOC_GET_ENCRYPTION_NONCE:
1373 case EXT4_IOC_SHUTDOWN:
1374 case FS_IOC_GETFSMAP:
1375 case FS_IOC_ENABLE_VERITY:
1376 case FS_IOC_MEASURE_VERITY:
1377 case EXT4_IOC_CLEAR_ES_CACHE:
1378 case EXT4_IOC_GETSTATE:
1379 case EXT4_IOC_GET_ES_CACHE:
1380 case EXT4_IOC_FSGETXATTR:
1381 case EXT4_IOC_FSSETXATTR:
1382 break;
1383 default:
1384 return -ENOIOCTLCMD;
1385 }
1386 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1387}
1388#endif
1389
