This source file includes following definitions.
- memswap
- swap_inode_data
- reset_inode_seed
- swap_inode_boot_loader
- uuid_is_zero
- ext4_ioctl_check_immutable
- ext4_ioctl_setflags
- ext4_ioctl_setproject
- ext4_ioctl_setproject
- ext4_iflags_to_xflags
- ext4_xflags_to_iflags
- ext4_shutdown
- ext4_getfsmap_format
- ext4_ioc_getfsmap
- ext4_ioctl_group_add
- ext4_fill_fsxattr
- fiemap_check_ranges
- ext4_ioctl
- ext4_compat_ioctl
1
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9
10
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
37 static 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
61 static 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
89 static 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
113 static 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) {
239 revert:
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
248 err_out1:
249 ext4_journal_stop(handle);
250 ext4_double_up_write_data_sem(inode, inode_bl);
251
252 err_out:
253 up_write(&EXT4_I(inode)->i_mmap_sem);
254 journal_err_out:
255 unlock_two_nondirectories(inode, inode_bl);
256 iput(inode_bl);
257 return err;
258 }
259
260 #ifdef CONFIG_FS_ENCRYPTION
261 static 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
277 static 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
295 static int ext4_ioctl_setflags(struct inode *inode,
296 unsigned int flags)
297 {
298 struct ext4_inode_info *ei = EXT4_I(inode);
299 handle_t *handle = NULL;
300 int err = -EPERM, migrate = 0;
301 struct ext4_iloc iloc;
302 unsigned int oldflags, mask, i;
303 unsigned int jflag;
304 struct super_block *sb = inode->i_sb;
305
306
307 if (ext4_is_quota_file(inode))
308 goto flags_out;
309
310 oldflags = ei->i_flags;
311
312
313 jflag = flags & EXT4_JOURNAL_DATA_FL;
314
315 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
316 if (err)
317 goto flags_out;
318
319
320
321
322
323 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
324 if (!capable(CAP_SYS_RESOURCE))
325 goto flags_out;
326 }
327 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
328 migrate = 1;
329
330 if (flags & EXT4_EOFBLOCKS_FL) {
331
332 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
333 err = -EOPNOTSUPP;
334 goto flags_out;
335 }
336 } else if (oldflags & EXT4_EOFBLOCKS_FL) {
337 err = ext4_truncate(inode);
338 if (err)
339 goto flags_out;
340 }
341
342 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
343 if (!ext4_has_feature_casefold(sb)) {
344 err = -EOPNOTSUPP;
345 goto flags_out;
346 }
347
348 if (!S_ISDIR(inode->i_mode)) {
349 err = -ENOTDIR;
350 goto flags_out;
351 }
352
353 if (!ext4_empty_dir(inode)) {
354 err = -ENOTEMPTY;
355 goto flags_out;
356 }
357 }
358
359
360
361
362
363
364
365 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
366 (flags & EXT4_IMMUTABLE_FL)) {
367 inode_dio_wait(inode);
368 err = filemap_write_and_wait(inode->i_mapping);
369 if (err)
370 goto flags_out;
371 }
372
373 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
374 if (IS_ERR(handle)) {
375 err = PTR_ERR(handle);
376 goto flags_out;
377 }
378 if (IS_SYNC(inode))
379 ext4_handle_sync(handle);
380 err = ext4_reserve_inode_write(handle, inode, &iloc);
381 if (err)
382 goto flags_err;
383
384 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
385 if (!(mask & EXT4_FL_USER_MODIFIABLE))
386 continue;
387
388 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
389 continue;
390 if (mask & flags)
391 ext4_set_inode_flag(inode, i);
392 else
393 ext4_clear_inode_flag(inode, i);
394 }
395
396 ext4_set_inode_flags(inode);
397 inode->i_ctime = current_time(inode);
398
399 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
400 flags_err:
401 ext4_journal_stop(handle);
402 if (err)
403 goto flags_out;
404
405 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
406
407
408
409
410 if (test_opt(inode->i_sb, DAX)) {
411 err = -EBUSY;
412 goto flags_out;
413 }
414
415 err = ext4_change_inode_journal_flag(inode, jflag);
416 if (err)
417 goto flags_out;
418 }
419 if (migrate) {
420 if (flags & EXT4_EXTENTS_FL)
421 err = ext4_ext_migrate(inode);
422 else
423 err = ext4_ind_migrate(inode);
424 }
425
426 flags_out:
427 return err;
428 }
429
430 #ifdef CONFIG_QUOTA
431 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
432 {
433 struct inode *inode = file_inode(filp);
434 struct super_block *sb = inode->i_sb;
435 struct ext4_inode_info *ei = EXT4_I(inode);
436 int err, rc;
437 handle_t *handle;
438 kprojid_t kprojid;
439 struct ext4_iloc iloc;
440 struct ext4_inode *raw_inode;
441 struct dquot *transfer_to[MAXQUOTAS] = { };
442
443 if (!ext4_has_feature_project(sb)) {
444 if (projid != EXT4_DEF_PROJID)
445 return -EOPNOTSUPP;
446 else
447 return 0;
448 }
449
450 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
451 return -EOPNOTSUPP;
452
453 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
454
455 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
456 return 0;
457
458 err = -EPERM;
459
460 if (ext4_is_quota_file(inode))
461 return err;
462
463 err = ext4_get_inode_loc(inode, &iloc);
464 if (err)
465 return err;
466
467 raw_inode = ext4_raw_inode(&iloc);
468 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
469 err = ext4_expand_extra_isize(inode,
470 EXT4_SB(sb)->s_want_extra_isize,
471 &iloc);
472 if (err)
473 return err;
474 } else {
475 brelse(iloc.bh);
476 }
477
478 err = dquot_initialize(inode);
479 if (err)
480 return err;
481
482 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
483 EXT4_QUOTA_INIT_BLOCKS(sb) +
484 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
485 if (IS_ERR(handle))
486 return PTR_ERR(handle);
487
488 err = ext4_reserve_inode_write(handle, inode, &iloc);
489 if (err)
490 goto out_stop;
491
492 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
493 if (!IS_ERR(transfer_to[PRJQUOTA])) {
494
495
496
497
498 down_read(&EXT4_I(inode)->xattr_sem);
499 err = __dquot_transfer(inode, transfer_to);
500 up_read(&EXT4_I(inode)->xattr_sem);
501 dqput(transfer_to[PRJQUOTA]);
502 if (err)
503 goto out_dirty;
504 }
505
506 EXT4_I(inode)->i_projid = kprojid;
507 inode->i_ctime = current_time(inode);
508 out_dirty:
509 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
510 if (!err)
511 err = rc;
512 out_stop:
513 ext4_journal_stop(handle);
514 return err;
515 }
516 #else
517 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
518 {
519 if (projid != EXT4_DEF_PROJID)
520 return -EOPNOTSUPP;
521 return 0;
522 }
523 #endif
524
525
526 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
527 {
528 __u32 xflags = 0;
529
530 if (iflags & EXT4_SYNC_FL)
531 xflags |= FS_XFLAG_SYNC;
532 if (iflags & EXT4_IMMUTABLE_FL)
533 xflags |= FS_XFLAG_IMMUTABLE;
534 if (iflags & EXT4_APPEND_FL)
535 xflags |= FS_XFLAG_APPEND;
536 if (iflags & EXT4_NODUMP_FL)
537 xflags |= FS_XFLAG_NODUMP;
538 if (iflags & EXT4_NOATIME_FL)
539 xflags |= FS_XFLAG_NOATIME;
540 if (iflags & EXT4_PROJINHERIT_FL)
541 xflags |= FS_XFLAG_PROJINHERIT;
542 return xflags;
543 }
544
545 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
546 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
547 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
548
549
550 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
551 {
552 unsigned long iflags = 0;
553
554 if (xflags & FS_XFLAG_SYNC)
555 iflags |= EXT4_SYNC_FL;
556 if (xflags & FS_XFLAG_IMMUTABLE)
557 iflags |= EXT4_IMMUTABLE_FL;
558 if (xflags & FS_XFLAG_APPEND)
559 iflags |= EXT4_APPEND_FL;
560 if (xflags & FS_XFLAG_NODUMP)
561 iflags |= EXT4_NODUMP_FL;
562 if (xflags & FS_XFLAG_NOATIME)
563 iflags |= EXT4_NOATIME_FL;
564 if (xflags & FS_XFLAG_PROJINHERIT)
565 iflags |= EXT4_PROJINHERIT_FL;
566
567 return iflags;
568 }
569
570 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
571 {
572 struct ext4_sb_info *sbi = EXT4_SB(sb);
573 __u32 flags;
574
575 if (!capable(CAP_SYS_ADMIN))
576 return -EPERM;
577
578 if (get_user(flags, (__u32 __user *)arg))
579 return -EFAULT;
580
581 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
582 return -EINVAL;
583
584 if (ext4_forced_shutdown(sbi))
585 return 0;
586
587 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
588 trace_ext4_shutdown(sb, flags);
589
590 switch (flags) {
591 case EXT4_GOING_FLAGS_DEFAULT:
592 freeze_bdev(sb->s_bdev);
593 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
594 thaw_bdev(sb->s_bdev, sb);
595 break;
596 case EXT4_GOING_FLAGS_LOGFLUSH:
597 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
598 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
599 (void) ext4_force_commit(sb);
600 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
601 }
602 break;
603 case EXT4_GOING_FLAGS_NOLOGFLUSH:
604 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
605 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
606 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
607 break;
608 default:
609 return -EINVAL;
610 }
611 clear_opt(sb, DISCARD);
612 return 0;
613 }
614
615 struct getfsmap_info {
616 struct super_block *gi_sb;
617 struct fsmap_head __user *gi_data;
618 unsigned int gi_idx;
619 __u32 gi_last_flags;
620 };
621
622 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
623 {
624 struct getfsmap_info *info = priv;
625 struct fsmap fm;
626
627 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
628
629 info->gi_last_flags = xfm->fmr_flags;
630 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
631 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
632 sizeof(struct fsmap)))
633 return -EFAULT;
634
635 return 0;
636 }
637
638 static int ext4_ioc_getfsmap(struct super_block *sb,
639 struct fsmap_head __user *arg)
640 {
641 struct getfsmap_info info = { NULL };
642 struct ext4_fsmap_head xhead = {0};
643 struct fsmap_head head;
644 bool aborted = false;
645 int error;
646
647 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
648 return -EFAULT;
649 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
650 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
651 sizeof(head.fmh_keys[0].fmr_reserved)) ||
652 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
653 sizeof(head.fmh_keys[1].fmr_reserved)))
654 return -EINVAL;
655
656
657
658
659 if (head.fmh_keys[0].fmr_offset ||
660 (head.fmh_keys[1].fmr_offset != 0 &&
661 head.fmh_keys[1].fmr_offset != -1ULL))
662 return -EINVAL;
663
664 xhead.fmh_iflags = head.fmh_iflags;
665 xhead.fmh_count = head.fmh_count;
666 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
667 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
668
669 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
670 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
671
672 info.gi_sb = sb;
673 info.gi_data = arg;
674 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
675 if (error == EXT4_QUERY_RANGE_ABORT) {
676 error = 0;
677 aborted = true;
678 } else if (error)
679 return error;
680
681
682 if (!aborted && info.gi_idx) {
683 info.gi_last_flags |= FMR_OF_LAST;
684 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
685 &info.gi_last_flags,
686 sizeof(info.gi_last_flags)))
687 return -EFAULT;
688 }
689
690
691 head.fmh_entries = xhead.fmh_entries;
692 head.fmh_oflags = xhead.fmh_oflags;
693 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
694 return -EFAULT;
695
696 return 0;
697 }
698
699 static long ext4_ioctl_group_add(struct file *file,
700 struct ext4_new_group_data *input)
701 {
702 struct super_block *sb = file_inode(file)->i_sb;
703 int err, err2=0;
704
705 err = ext4_resize_begin(sb);
706 if (err)
707 return err;
708
709 if (ext4_has_feature_bigalloc(sb)) {
710 ext4_msg(sb, KERN_ERR,
711 "Online resizing not supported with bigalloc");
712 err = -EOPNOTSUPP;
713 goto group_add_out;
714 }
715
716 err = mnt_want_write_file(file);
717 if (err)
718 goto group_add_out;
719
720 err = ext4_group_add(sb, input);
721 if (EXT4_SB(sb)->s_journal) {
722 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
723 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
724 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
725 }
726 if (err == 0)
727 err = err2;
728 mnt_drop_write_file(file);
729 if (!err && ext4_has_group_desc_csum(sb) &&
730 test_opt(sb, INIT_INODE_TABLE))
731 err = ext4_register_li_request(sb, input->group);
732 group_add_out:
733 ext4_resize_end(sb);
734 return err;
735 }
736
737 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
738 {
739 struct ext4_inode_info *ei = EXT4_I(inode);
740
741 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
742 EXT4_FL_USER_VISIBLE));
743
744 if (ext4_has_feature_project(inode->i_sb))
745 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
746 }
747
748
749 static int fiemap_check_ranges(struct super_block *sb,
750 u64 start, u64 len, u64 *new_len)
751 {
752 u64 maxbytes = (u64) sb->s_maxbytes;
753
754 *new_len = len;
755
756 if (len == 0)
757 return -EINVAL;
758
759 if (start > maxbytes)
760 return -EFBIG;
761
762
763
764
765 if (len > maxbytes || (maxbytes - len) < start)
766 *new_len = maxbytes - start;
767
768 return 0;
769 }
770
771
772 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
773
774 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
775 {
776 struct fiemap fiemap;
777 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
778 struct fiemap_extent_info fieinfo = { 0, };
779 struct inode *inode = file_inode(filp);
780 struct super_block *sb = inode->i_sb;
781 u64 len;
782 int error;
783
784 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
785 return -EFAULT;
786
787 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
788 return -EINVAL;
789
790 error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
791 &len);
792 if (error)
793 return error;
794
795 fieinfo.fi_flags = fiemap.fm_flags;
796 fieinfo.fi_extents_max = fiemap.fm_extent_count;
797 fieinfo.fi_extents_start = ufiemap->fm_extents;
798
799 if (fiemap.fm_extent_count != 0 &&
800 !access_ok(fieinfo.fi_extents_start,
801 fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
802 return -EFAULT;
803
804 if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
805 filemap_write_and_wait(inode->i_mapping);
806
807 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, len);
808 fiemap.fm_flags = fieinfo.fi_flags;
809 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
810 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
811 error = -EFAULT;
812
813 return error;
814 }
815
816 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
817 {
818 struct inode *inode = file_inode(filp);
819 struct super_block *sb = inode->i_sb;
820 struct ext4_inode_info *ei = EXT4_I(inode);
821 unsigned int flags;
822
823 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
824
825 switch (cmd) {
826 case FS_IOC_GETFSMAP:
827 return ext4_ioc_getfsmap(sb, (void __user *)arg);
828 case EXT4_IOC_GETFLAGS:
829 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
830 if (S_ISREG(inode->i_mode))
831 flags &= ~EXT4_PROJINHERIT_FL;
832 return put_user(flags, (int __user *) arg);
833 case EXT4_IOC_SETFLAGS: {
834 int err;
835
836 if (!inode_owner_or_capable(inode))
837 return -EACCES;
838
839 if (get_user(flags, (int __user *) arg))
840 return -EFAULT;
841
842 if (flags & ~EXT4_FL_USER_VISIBLE)
843 return -EOPNOTSUPP;
844
845
846
847
848
849
850 flags &= EXT4_FL_USER_MODIFIABLE;
851 if (ext4_mask_flags(inode->i_mode, flags) != flags)
852 return -EOPNOTSUPP;
853
854 err = mnt_want_write_file(filp);
855 if (err)
856 return err;
857
858 inode_lock(inode);
859 err = ext4_ioctl_check_immutable(inode,
860 from_kprojid(&init_user_ns, ei->i_projid),
861 flags);
862 if (!err)
863 err = ext4_ioctl_setflags(inode, flags);
864 inode_unlock(inode);
865 mnt_drop_write_file(filp);
866 return err;
867 }
868 case EXT4_IOC_GETVERSION:
869 case EXT4_IOC_GETVERSION_OLD:
870 return put_user(inode->i_generation, (int __user *) arg);
871 case EXT4_IOC_SETVERSION:
872 case EXT4_IOC_SETVERSION_OLD: {
873 handle_t *handle;
874 struct ext4_iloc iloc;
875 __u32 generation;
876 int err;
877
878 if (!inode_owner_or_capable(inode))
879 return -EPERM;
880
881 if (ext4_has_metadata_csum(inode->i_sb)) {
882 ext4_warning(sb, "Setting inode version is not "
883 "supported with metadata_csum enabled.");
884 return -ENOTTY;
885 }
886
887 err = mnt_want_write_file(filp);
888 if (err)
889 return err;
890 if (get_user(generation, (int __user *) arg)) {
891 err = -EFAULT;
892 goto setversion_out;
893 }
894
895 inode_lock(inode);
896 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
897 if (IS_ERR(handle)) {
898 err = PTR_ERR(handle);
899 goto unlock_out;
900 }
901 err = ext4_reserve_inode_write(handle, inode, &iloc);
902 if (err == 0) {
903 inode->i_ctime = current_time(inode);
904 inode->i_generation = generation;
905 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
906 }
907 ext4_journal_stop(handle);
908
909 unlock_out:
910 inode_unlock(inode);
911 setversion_out:
912 mnt_drop_write_file(filp);
913 return err;
914 }
915 case EXT4_IOC_GROUP_EXTEND: {
916 ext4_fsblk_t n_blocks_count;
917 int err, err2=0;
918
919 err = ext4_resize_begin(sb);
920 if (err)
921 return err;
922
923 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
924 err = -EFAULT;
925 goto group_extend_out;
926 }
927
928 if (ext4_has_feature_bigalloc(sb)) {
929 ext4_msg(sb, KERN_ERR,
930 "Online resizing not supported with bigalloc");
931 err = -EOPNOTSUPP;
932 goto group_extend_out;
933 }
934
935 err = mnt_want_write_file(filp);
936 if (err)
937 goto group_extend_out;
938
939 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
940 if (EXT4_SB(sb)->s_journal) {
941 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
942 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
943 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
944 }
945 if (err == 0)
946 err = err2;
947 mnt_drop_write_file(filp);
948 group_extend_out:
949 ext4_resize_end(sb);
950 return err;
951 }
952
953 case EXT4_IOC_MOVE_EXT: {
954 struct move_extent me;
955 struct fd donor;
956 int err;
957
958 if (!(filp->f_mode & FMODE_READ) ||
959 !(filp->f_mode & FMODE_WRITE))
960 return -EBADF;
961
962 if (copy_from_user(&me,
963 (struct move_extent __user *)arg, sizeof(me)))
964 return -EFAULT;
965 me.moved_len = 0;
966
967 donor = fdget(me.donor_fd);
968 if (!donor.file)
969 return -EBADF;
970
971 if (!(donor.file->f_mode & FMODE_WRITE)) {
972 err = -EBADF;
973 goto mext_out;
974 }
975
976 if (ext4_has_feature_bigalloc(sb)) {
977 ext4_msg(sb, KERN_ERR,
978 "Online defrag not supported with bigalloc");
979 err = -EOPNOTSUPP;
980 goto mext_out;
981 } else if (IS_DAX(inode)) {
982 ext4_msg(sb, KERN_ERR,
983 "Online defrag not supported with DAX");
984 err = -EOPNOTSUPP;
985 goto mext_out;
986 }
987
988 err = mnt_want_write_file(filp);
989 if (err)
990 goto mext_out;
991
992 err = ext4_move_extents(filp, donor.file, me.orig_start,
993 me.donor_start, me.len, &me.moved_len);
994 mnt_drop_write_file(filp);
995
996 if (copy_to_user((struct move_extent __user *)arg,
997 &me, sizeof(me)))
998 err = -EFAULT;
999 mext_out:
1000 fdput(donor);
1001 return err;
1002 }
1003
1004 case EXT4_IOC_GROUP_ADD: {
1005 struct ext4_new_group_data input;
1006
1007 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1008 sizeof(input)))
1009 return -EFAULT;
1010
1011 return ext4_ioctl_group_add(filp, &input);
1012 }
1013
1014 case EXT4_IOC_MIGRATE:
1015 {
1016 int err;
1017 if (!inode_owner_or_capable(inode))
1018 return -EACCES;
1019
1020 err = mnt_want_write_file(filp);
1021 if (err)
1022 return err;
1023
1024
1025
1026
1027
1028
1029 inode_lock((inode));
1030 err = ext4_ext_migrate(inode);
1031 inode_unlock((inode));
1032 mnt_drop_write_file(filp);
1033 return err;
1034 }
1035
1036 case EXT4_IOC_ALLOC_DA_BLKS:
1037 {
1038 int err;
1039 if (!inode_owner_or_capable(inode))
1040 return -EACCES;
1041
1042 err = mnt_want_write_file(filp);
1043 if (err)
1044 return err;
1045 err = ext4_alloc_da_blocks(inode);
1046 mnt_drop_write_file(filp);
1047 return err;
1048 }
1049
1050 case EXT4_IOC_SWAP_BOOT:
1051 {
1052 int err;
1053 if (!(filp->f_mode & FMODE_WRITE))
1054 return -EBADF;
1055 err = mnt_want_write_file(filp);
1056 if (err)
1057 return err;
1058 err = swap_inode_boot_loader(sb, inode);
1059 mnt_drop_write_file(filp);
1060 return err;
1061 }
1062
1063 case EXT4_IOC_RESIZE_FS: {
1064 ext4_fsblk_t n_blocks_count;
1065 int err = 0, err2 = 0;
1066 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1067
1068 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1069 sizeof(__u64))) {
1070 return -EFAULT;
1071 }
1072
1073 err = ext4_resize_begin(sb);
1074 if (err)
1075 return err;
1076
1077 err = mnt_want_write_file(filp);
1078 if (err)
1079 goto resizefs_out;
1080
1081 err = ext4_resize_fs(sb, n_blocks_count);
1082 if (EXT4_SB(sb)->s_journal) {
1083 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1084 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1085 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1086 }
1087 if (err == 0)
1088 err = err2;
1089 mnt_drop_write_file(filp);
1090 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1091 ext4_has_group_desc_csum(sb) &&
1092 test_opt(sb, INIT_INODE_TABLE))
1093 err = ext4_register_li_request(sb, o_group);
1094
1095 resizefs_out:
1096 ext4_resize_end(sb);
1097 return err;
1098 }
1099
1100 case FITRIM:
1101 {
1102 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1103 struct fstrim_range range;
1104 int ret = 0;
1105
1106 if (!capable(CAP_SYS_ADMIN))
1107 return -EPERM;
1108
1109 if (!blk_queue_discard(q))
1110 return -EOPNOTSUPP;
1111
1112
1113
1114
1115
1116 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1117 return -EROFS;
1118
1119 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1120 sizeof(range)))
1121 return -EFAULT;
1122
1123 range.minlen = max((unsigned int)range.minlen,
1124 q->limits.discard_granularity);
1125 ret = ext4_trim_fs(sb, &range);
1126 if (ret < 0)
1127 return ret;
1128
1129 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1130 sizeof(range)))
1131 return -EFAULT;
1132
1133 return 0;
1134 }
1135 case EXT4_IOC_PRECACHE_EXTENTS:
1136 return ext4_ext_precache(inode);
1137
1138 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1139 if (!ext4_has_feature_encrypt(sb))
1140 return -EOPNOTSUPP;
1141 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1142
1143 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
1144 #ifdef CONFIG_FS_ENCRYPTION
1145 int err, err2;
1146 struct ext4_sb_info *sbi = EXT4_SB(sb);
1147 handle_t *handle;
1148
1149 if (!ext4_has_feature_encrypt(sb))
1150 return -EOPNOTSUPP;
1151 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1152 err = mnt_want_write_file(filp);
1153 if (err)
1154 return err;
1155 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1156 if (IS_ERR(handle)) {
1157 err = PTR_ERR(handle);
1158 goto pwsalt_err_exit;
1159 }
1160 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1161 if (err)
1162 goto pwsalt_err_journal;
1163 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1164 err = ext4_handle_dirty_metadata(handle, NULL,
1165 sbi->s_sbh);
1166 pwsalt_err_journal:
1167 err2 = ext4_journal_stop(handle);
1168 if (err2 && !err)
1169 err = err2;
1170 pwsalt_err_exit:
1171 mnt_drop_write_file(filp);
1172 if (err)
1173 return err;
1174 }
1175 if (copy_to_user((void __user *) arg,
1176 sbi->s_es->s_encrypt_pw_salt, 16))
1177 return -EFAULT;
1178 return 0;
1179 #else
1180 return -EOPNOTSUPP;
1181 #endif
1182 }
1183 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1184 if (!ext4_has_feature_encrypt(sb))
1185 return -EOPNOTSUPP;
1186 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1187
1188 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1189 if (!ext4_has_feature_encrypt(sb))
1190 return -EOPNOTSUPP;
1191 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1192
1193 case FS_IOC_ADD_ENCRYPTION_KEY:
1194 if (!ext4_has_feature_encrypt(sb))
1195 return -EOPNOTSUPP;
1196 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1197
1198 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1199 if (!ext4_has_feature_encrypt(sb))
1200 return -EOPNOTSUPP;
1201 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1202
1203 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1204 if (!ext4_has_feature_encrypt(sb))
1205 return -EOPNOTSUPP;
1206 return fscrypt_ioctl_remove_key_all_users(filp,
1207 (void __user *)arg);
1208 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1209 if (!ext4_has_feature_encrypt(sb))
1210 return -EOPNOTSUPP;
1211 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1212
1213 case EXT4_IOC_CLEAR_ES_CACHE:
1214 {
1215 if (!inode_owner_or_capable(inode))
1216 return -EACCES;
1217 ext4_clear_inode_es(inode);
1218 return 0;
1219 }
1220
1221 case EXT4_IOC_GETSTATE:
1222 {
1223 __u32 state = 0;
1224
1225 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1226 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1227 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1228 state |= EXT4_STATE_FLAG_NEW;
1229 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1230 state |= EXT4_STATE_FLAG_NEWENTRY;
1231 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1232 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1233
1234 return put_user(state, (__u32 __user *) arg);
1235 }
1236
1237 case EXT4_IOC_GET_ES_CACHE:
1238 return ext4_ioctl_get_es_cache(filp, arg);
1239
1240 case EXT4_IOC_FSGETXATTR:
1241 {
1242 struct fsxattr fa;
1243
1244 ext4_fill_fsxattr(inode, &fa);
1245
1246 if (copy_to_user((struct fsxattr __user *)arg,
1247 &fa, sizeof(fa)))
1248 return -EFAULT;
1249 return 0;
1250 }
1251 case EXT4_IOC_FSSETXATTR:
1252 {
1253 struct fsxattr fa, old_fa;
1254 int err;
1255
1256 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1257 sizeof(fa)))
1258 return -EFAULT;
1259
1260
1261 if (!inode_owner_or_capable(inode))
1262 return -EACCES;
1263
1264 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1265 return -EOPNOTSUPP;
1266
1267 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1268 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1269 return -EOPNOTSUPP;
1270
1271 err = mnt_want_write_file(filp);
1272 if (err)
1273 return err;
1274
1275 inode_lock(inode);
1276 ext4_fill_fsxattr(inode, &old_fa);
1277 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1278 if (err)
1279 goto out;
1280 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1281 (flags & EXT4_FL_XFLAG_VISIBLE);
1282 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1283 if (err)
1284 goto out;
1285 err = ext4_ioctl_setflags(inode, flags);
1286 if (err)
1287 goto out;
1288 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1289 out:
1290 inode_unlock(inode);
1291 mnt_drop_write_file(filp);
1292 return err;
1293 }
1294 case EXT4_IOC_SHUTDOWN:
1295 return ext4_shutdown(sb, arg);
1296
1297 case FS_IOC_ENABLE_VERITY:
1298 if (!ext4_has_feature_verity(sb))
1299 return -EOPNOTSUPP;
1300 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1301
1302 case FS_IOC_MEASURE_VERITY:
1303 if (!ext4_has_feature_verity(sb))
1304 return -EOPNOTSUPP;
1305 return fsverity_ioctl_measure(filp, (void __user *)arg);
1306
1307 default:
1308 return -ENOTTY;
1309 }
1310 }
1311
1312 #ifdef CONFIG_COMPAT
1313 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1314 {
1315
1316 switch (cmd) {
1317 case EXT4_IOC32_GETFLAGS:
1318 cmd = EXT4_IOC_GETFLAGS;
1319 break;
1320 case EXT4_IOC32_SETFLAGS:
1321 cmd = EXT4_IOC_SETFLAGS;
1322 break;
1323 case EXT4_IOC32_GETVERSION:
1324 cmd = EXT4_IOC_GETVERSION;
1325 break;
1326 case EXT4_IOC32_SETVERSION:
1327 cmd = EXT4_IOC_SETVERSION;
1328 break;
1329 case EXT4_IOC32_GROUP_EXTEND:
1330 cmd = EXT4_IOC_GROUP_EXTEND;
1331 break;
1332 case EXT4_IOC32_GETVERSION_OLD:
1333 cmd = EXT4_IOC_GETVERSION_OLD;
1334 break;
1335 case EXT4_IOC32_SETVERSION_OLD:
1336 cmd = EXT4_IOC_SETVERSION_OLD;
1337 break;
1338 case EXT4_IOC32_GETRSVSZ:
1339 cmd = EXT4_IOC_GETRSVSZ;
1340 break;
1341 case EXT4_IOC32_SETRSVSZ:
1342 cmd = EXT4_IOC_SETRSVSZ;
1343 break;
1344 case EXT4_IOC32_GROUP_ADD: {
1345 struct compat_ext4_new_group_input __user *uinput;
1346 struct ext4_new_group_data input;
1347 int err;
1348
1349 uinput = compat_ptr(arg);
1350 err = get_user(input.group, &uinput->group);
1351 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1352 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1353 err |= get_user(input.inode_table, &uinput->inode_table);
1354 err |= get_user(input.blocks_count, &uinput->blocks_count);
1355 err |= get_user(input.reserved_blocks,
1356 &uinput->reserved_blocks);
1357 if (err)
1358 return -EFAULT;
1359 return ext4_ioctl_group_add(file, &input);
1360 }
1361 case EXT4_IOC_MOVE_EXT:
1362 case EXT4_IOC_RESIZE_FS:
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 EXT4_IOC_SHUTDOWN:
1373 case FS_IOC_GETFSMAP:
1374 case FS_IOC_ENABLE_VERITY:
1375 case FS_IOC_MEASURE_VERITY:
1376 case EXT4_IOC_CLEAR_ES_CACHE:
1377 case EXT4_IOC_GETSTATE:
1378 case EXT4_IOC_GET_ES_CACHE:
1379 break;
1380 default:
1381 return -ENOIOCTLCMD;
1382 }
1383 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1384 }
1385 #endif