2 * linux/fs/ext4/ioctl.c
4 * Copyright (C) 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 #include <linux/capability.h>
12 #include <linux/time.h>
13 #include <linux/compat.h>
14 #include <linux/mount.h>
15 #include <linux/file.h>
16 #include <linux/quotaops.h>
17 #include <linux/uuid.h>
18 #include <linux/uaccess.h>
19 #include <linux/delay.h>
20 #include "ext4_jbd2.h"
22 #include <linux/fsmap.h>
24 #include <trace/events/ext4.h>
27 * Swap memory between @a and @b for @len bytes.
29 * @a: pointer to first memory area
30 * @b: pointer to second memory area
31 * @len: number of bytes to swap
34 static void memswap(void *a
, void *b
, size_t len
)
36 unsigned char *ap
, *bp
;
38 ap
= (unsigned char *)a
;
39 bp
= (unsigned char *)b
;
48 * Swap i_data and associated attributes between @inode1 and @inode2.
49 * This function is used for the primary swap between inode1 and inode2
50 * and also to revert this primary swap in case of errors.
52 * Therefore you have to make sure, that calling this method twice
53 * will revert all changes.
55 * @inode1: pointer to first inode
56 * @inode2: pointer to second inode
58 static void swap_inode_data(struct inode
*inode1
, struct inode
*inode2
)
61 struct ext4_inode_info
*ei1
;
62 struct ext4_inode_info
*ei2
;
67 swap(inode1
->i_flags
, inode2
->i_flags
);
68 swap(inode1
->i_version
, inode2
->i_version
);
69 swap(inode1
->i_blocks
, inode2
->i_blocks
);
70 swap(inode1
->i_bytes
, inode2
->i_bytes
);
71 swap(inode1
->i_atime
, inode2
->i_atime
);
72 swap(inode1
->i_mtime
, inode2
->i_mtime
);
74 memswap(ei1
->i_data
, ei2
->i_data
, sizeof(ei1
->i_data
));
75 swap(ei1
->i_flags
, ei2
->i_flags
);
76 swap(ei1
->i_disksize
, ei2
->i_disksize
);
77 ext4_es_remove_extent(inode1
, 0, EXT_MAX_BLOCKS
);
78 ext4_es_remove_extent(inode2
, 0, EXT_MAX_BLOCKS
);
80 isize
= i_size_read(inode1
);
81 i_size_write(inode1
, i_size_read(inode2
));
82 i_size_write(inode2
, isize
);
86 * Swap the information from the given @inode and the inode
87 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
88 * important fields of the inodes.
90 * @sb: the super block of the filesystem
91 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
94 static long swap_inode_boot_loader(struct super_block
*sb
,
99 struct inode
*inode_bl
;
100 struct ext4_inode_info
*ei_bl
;
101 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
103 if (inode
->i_nlink
!= 1 || !S_ISREG(inode
->i_mode
))
106 if (!inode_owner_or_capable(inode
) || !capable(CAP_SYS_ADMIN
))
109 inode_bl
= ext4_iget(sb
, EXT4_BOOT_LOADER_INO
);
110 if (IS_ERR(inode_bl
))
111 return PTR_ERR(inode_bl
);
112 ei_bl
= EXT4_I(inode_bl
);
114 filemap_flush(inode
->i_mapping
);
115 filemap_flush(inode_bl
->i_mapping
);
117 /* Protect orig inodes against a truncate and make sure,
118 * that only 1 swap_inode_boot_loader is running. */
119 lock_two_nondirectories(inode
, inode_bl
);
121 truncate_inode_pages(&inode
->i_data
, 0);
122 truncate_inode_pages(&inode_bl
->i_data
, 0);
124 /* Wait for all existing dio workers */
125 ext4_inode_block_unlocked_dio(inode
);
126 ext4_inode_block_unlocked_dio(inode_bl
);
127 inode_dio_wait(inode
);
128 inode_dio_wait(inode_bl
);
130 handle
= ext4_journal_start(inode_bl
, EXT4_HT_MOVE_EXTENTS
, 2);
131 if (IS_ERR(handle
)) {
133 goto journal_err_out
;
136 /* Protect extent tree against block allocations via delalloc */
137 ext4_double_down_write_data_sem(inode
, inode_bl
);
139 if (inode_bl
->i_nlink
== 0) {
140 /* this inode has never been used as a BOOT_LOADER */
141 set_nlink(inode_bl
, 1);
142 i_uid_write(inode_bl
, 0);
143 i_gid_write(inode_bl
, 0);
144 inode_bl
->i_flags
= 0;
146 inode_bl
->i_version
= 1;
147 i_size_write(inode_bl
, 0);
148 inode_bl
->i_mode
= S_IFREG
;
149 if (ext4_has_feature_extents(sb
)) {
150 ext4_set_inode_flag(inode_bl
, EXT4_INODE_EXTENTS
);
151 ext4_ext_tree_init(handle
, inode_bl
);
153 memset(ei_bl
->i_data
, 0, sizeof(ei_bl
->i_data
));
156 swap_inode_data(inode
, inode_bl
);
158 inode
->i_ctime
= inode_bl
->i_ctime
= current_time(inode
);
160 spin_lock(&sbi
->s_next_gen_lock
);
161 inode
->i_generation
= sbi
->s_next_generation
++;
162 inode_bl
->i_generation
= sbi
->s_next_generation
++;
163 spin_unlock(&sbi
->s_next_gen_lock
);
165 ext4_discard_preallocations(inode
);
167 err
= ext4_mark_inode_dirty(handle
, inode
);
169 ext4_warning(inode
->i_sb
,
170 "couldn't mark inode #%lu dirty (err %d)",
172 /* Revert all changes: */
173 swap_inode_data(inode
, inode_bl
);
175 err
= ext4_mark_inode_dirty(handle
, inode_bl
);
177 ext4_warning(inode_bl
->i_sb
,
178 "couldn't mark inode #%lu dirty (err %d)",
179 inode_bl
->i_ino
, err
);
180 /* Revert all changes: */
181 swap_inode_data(inode
, inode_bl
);
182 ext4_mark_inode_dirty(handle
, inode
);
185 ext4_journal_stop(handle
);
186 ext4_double_up_write_data_sem(inode
, inode_bl
);
189 ext4_inode_resume_unlocked_dio(inode
);
190 ext4_inode_resume_unlocked_dio(inode_bl
);
191 unlock_two_nondirectories(inode
, inode_bl
);
196 #ifdef CONFIG_EXT4_FS_ENCRYPTION
197 static int uuid_is_zero(__u8 u
[16])
201 for (i
= 0; i
< 16; i
++)
208 static int ext4_ioctl_setflags(struct inode
*inode
,
211 struct ext4_inode_info
*ei
= EXT4_I(inode
);
212 handle_t
*handle
= NULL
;
213 int err
= -EPERM
, migrate
= 0;
214 struct ext4_iloc iloc
;
215 unsigned int oldflags
, mask
, i
;
218 /* Is it quota file? Do not allow user to mess with it */
219 if (ext4_is_quota_file(inode
))
222 oldflags
= ei
->i_flags
;
224 /* The JOURNAL_DATA flag is modifiable only by root */
225 jflag
= flags
& EXT4_JOURNAL_DATA_FL
;
228 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
229 * the relevant capability.
231 * This test looks nicer. Thanks to Pauline Middelink
233 if ((flags
^ oldflags
) & (EXT4_APPEND_FL
| EXT4_IMMUTABLE_FL
)) {
234 if (!capable(CAP_LINUX_IMMUTABLE
))
239 * The JOURNAL_DATA flag can only be changed by
240 * the relevant capability.
242 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
)) {
243 if (!capable(CAP_SYS_RESOURCE
))
246 if ((flags
^ oldflags
) & EXT4_EXTENTS_FL
)
249 if (flags
& EXT4_EOFBLOCKS_FL
) {
250 /* we don't support adding EOFBLOCKS flag */
251 if (!(oldflags
& EXT4_EOFBLOCKS_FL
)) {
255 } else if (oldflags
& EXT4_EOFBLOCKS_FL
) {
256 err
= ext4_truncate(inode
);
261 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
262 if (IS_ERR(handle
)) {
263 err
= PTR_ERR(handle
);
267 ext4_handle_sync(handle
);
268 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
272 for (i
= 0, mask
= 1; i
< 32; i
++, mask
<<= 1) {
273 if (!(mask
& EXT4_FL_USER_MODIFIABLE
))
275 /* These flags get special treatment later */
276 if (mask
== EXT4_JOURNAL_DATA_FL
|| mask
== EXT4_EXTENTS_FL
)
279 ext4_set_inode_flag(inode
, i
);
281 ext4_clear_inode_flag(inode
, i
);
284 ext4_set_inode_flags(inode
);
285 inode
->i_ctime
= current_time(inode
);
287 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
289 ext4_journal_stop(handle
);
293 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
))
294 err
= ext4_change_inode_journal_flag(inode
, jflag
);
298 if (flags
& EXT4_EXTENTS_FL
)
299 err
= ext4_ext_migrate(inode
);
301 err
= ext4_ind_migrate(inode
);
309 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
311 struct inode
*inode
= file_inode(filp
);
312 struct super_block
*sb
= inode
->i_sb
;
313 struct ext4_inode_info
*ei
= EXT4_I(inode
);
317 struct ext4_iloc iloc
;
318 struct ext4_inode
*raw_inode
;
319 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
321 if (!ext4_has_feature_project(sb
)) {
322 if (projid
!= EXT4_DEF_PROJID
)
328 if (EXT4_INODE_SIZE(sb
) <= EXT4_GOOD_OLD_INODE_SIZE
)
331 kprojid
= make_kprojid(&init_user_ns
, (projid_t
)projid
);
333 if (projid_eq(kprojid
, EXT4_I(inode
)->i_projid
))
336 err
= mnt_want_write_file(filp
);
342 /* Is it quota file? Do not allow user to mess with it */
343 if (ext4_is_quota_file(inode
))
346 err
= ext4_get_inode_loc(inode
, &iloc
);
350 raw_inode
= ext4_raw_inode(&iloc
);
351 if (!EXT4_FITS_IN_INODE(raw_inode
, ei
, i_projid
)) {
352 err
= ext4_expand_extra_isize(inode
,
353 EXT4_SB(sb
)->s_want_extra_isize
,
361 dquot_initialize(inode
);
363 handle
= ext4_journal_start(inode
, EXT4_HT_QUOTA
,
364 EXT4_QUOTA_INIT_BLOCKS(sb
) +
365 EXT4_QUOTA_DEL_BLOCKS(sb
) + 3);
366 if (IS_ERR(handle
)) {
367 err
= PTR_ERR(handle
);
371 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
375 transfer_to
[PRJQUOTA
] = dqget(sb
, make_kqid_projid(kprojid
));
376 if (!IS_ERR(transfer_to
[PRJQUOTA
])) {
378 /* __dquot_transfer() calls back ext4_get_inode_usage() which
379 * counts xattr inode references.
381 down_read(&EXT4_I(inode
)->xattr_sem
);
382 err
= __dquot_transfer(inode
, transfer_to
);
383 up_read(&EXT4_I(inode
)->xattr_sem
);
384 dqput(transfer_to
[PRJQUOTA
]);
389 EXT4_I(inode
)->i_projid
= kprojid
;
390 inode
->i_ctime
= current_time(inode
);
392 rc
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
396 ext4_journal_stop(handle
);
399 mnt_drop_write_file(filp
);
403 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
405 if (projid
!= EXT4_DEF_PROJID
)
411 /* Transfer internal flags to xflags */
412 static inline __u32
ext4_iflags_to_xflags(unsigned long iflags
)
416 if (iflags
& EXT4_SYNC_FL
)
417 xflags
|= FS_XFLAG_SYNC
;
418 if (iflags
& EXT4_IMMUTABLE_FL
)
419 xflags
|= FS_XFLAG_IMMUTABLE
;
420 if (iflags
& EXT4_APPEND_FL
)
421 xflags
|= FS_XFLAG_APPEND
;
422 if (iflags
& EXT4_NODUMP_FL
)
423 xflags
|= FS_XFLAG_NODUMP
;
424 if (iflags
& EXT4_NOATIME_FL
)
425 xflags
|= FS_XFLAG_NOATIME
;
426 if (iflags
& EXT4_PROJINHERIT_FL
)
427 xflags
|= FS_XFLAG_PROJINHERIT
;
431 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
432 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
433 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
435 /* Transfer xflags flags to internal */
436 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags
)
438 unsigned long iflags
= 0;
440 if (xflags
& FS_XFLAG_SYNC
)
441 iflags
|= EXT4_SYNC_FL
;
442 if (xflags
& FS_XFLAG_IMMUTABLE
)
443 iflags
|= EXT4_IMMUTABLE_FL
;
444 if (xflags
& FS_XFLAG_APPEND
)
445 iflags
|= EXT4_APPEND_FL
;
446 if (xflags
& FS_XFLAG_NODUMP
)
447 iflags
|= EXT4_NODUMP_FL
;
448 if (xflags
& FS_XFLAG_NOATIME
)
449 iflags
|= EXT4_NOATIME_FL
;
450 if (xflags
& FS_XFLAG_PROJINHERIT
)
451 iflags
|= EXT4_PROJINHERIT_FL
;
456 static int ext4_shutdown(struct super_block
*sb
, unsigned long arg
)
458 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
461 if (!capable(CAP_SYS_ADMIN
))
464 if (get_user(flags
, (__u32 __user
*)arg
))
467 if (flags
> EXT4_GOING_FLAGS_NOLOGFLUSH
)
470 if (ext4_forced_shutdown(sbi
))
473 ext4_msg(sb
, KERN_ALERT
, "shut down requested (%d)", flags
);
476 case EXT4_GOING_FLAGS_DEFAULT
:
477 freeze_bdev(sb
->s_bdev
);
478 set_bit(EXT4_FLAGS_SHUTDOWN
, &sbi
->s_ext4_flags
);
479 thaw_bdev(sb
->s_bdev
, sb
);
481 case EXT4_GOING_FLAGS_LOGFLUSH
:
482 set_bit(EXT4_FLAGS_SHUTDOWN
, &sbi
->s_ext4_flags
);
483 if (sbi
->s_journal
&& !is_journal_aborted(sbi
->s_journal
)) {
484 (void) ext4_force_commit(sb
);
485 jbd2_journal_abort(sbi
->s_journal
, 0);
488 case EXT4_GOING_FLAGS_NOLOGFLUSH
:
489 set_bit(EXT4_FLAGS_SHUTDOWN
, &sbi
->s_ext4_flags
);
490 if (sbi
->s_journal
&& !is_journal_aborted(sbi
->s_journal
)) {
492 jbd2_journal_abort(sbi
->s_journal
, 0);
498 clear_opt(sb
, DISCARD
);
502 struct getfsmap_info
{
503 struct super_block
*gi_sb
;
504 struct fsmap_head __user
*gi_data
;
509 static int ext4_getfsmap_format(struct ext4_fsmap
*xfm
, void *priv
)
511 struct getfsmap_info
*info
= priv
;
514 trace_ext4_getfsmap_mapping(info
->gi_sb
, xfm
);
516 info
->gi_last_flags
= xfm
->fmr_flags
;
517 ext4_fsmap_from_internal(info
->gi_sb
, &fm
, xfm
);
518 if (copy_to_user(&info
->gi_data
->fmh_recs
[info
->gi_idx
++], &fm
,
519 sizeof(struct fsmap
)))
525 static int ext4_ioc_getfsmap(struct super_block
*sb
,
526 struct fsmap_head __user
*arg
)
528 struct getfsmap_info info
= {0};
529 struct ext4_fsmap_head xhead
= {0};
530 struct fsmap_head head
;
531 bool aborted
= false;
534 if (copy_from_user(&head
, arg
, sizeof(struct fsmap_head
)))
536 if (memchr_inv(head
.fmh_reserved
, 0, sizeof(head
.fmh_reserved
)) ||
537 memchr_inv(head
.fmh_keys
[0].fmr_reserved
, 0,
538 sizeof(head
.fmh_keys
[0].fmr_reserved
)) ||
539 memchr_inv(head
.fmh_keys
[1].fmr_reserved
, 0,
540 sizeof(head
.fmh_keys
[1].fmr_reserved
)))
543 * ext4 doesn't report file extents at all, so the only valid
544 * file offsets are the magic ones (all zeroes or all ones).
546 if (head
.fmh_keys
[0].fmr_offset
||
547 (head
.fmh_keys
[1].fmr_offset
!= 0 &&
548 head
.fmh_keys
[1].fmr_offset
!= -1ULL))
551 xhead
.fmh_iflags
= head
.fmh_iflags
;
552 xhead
.fmh_count
= head
.fmh_count
;
553 ext4_fsmap_to_internal(sb
, &xhead
.fmh_keys
[0], &head
.fmh_keys
[0]);
554 ext4_fsmap_to_internal(sb
, &xhead
.fmh_keys
[1], &head
.fmh_keys
[1]);
556 trace_ext4_getfsmap_low_key(sb
, &xhead
.fmh_keys
[0]);
557 trace_ext4_getfsmap_high_key(sb
, &xhead
.fmh_keys
[1]);
561 error
= ext4_getfsmap(sb
, &xhead
, ext4_getfsmap_format
, &info
);
562 if (error
== EXT4_QUERY_RANGE_ABORT
) {
568 /* If we didn't abort, set the "last" flag in the last fmx */
569 if (!aborted
&& info
.gi_idx
) {
570 info
.gi_last_flags
|= FMR_OF_LAST
;
571 if (copy_to_user(&info
.gi_data
->fmh_recs
[info
.gi_idx
- 1].fmr_flags
,
573 sizeof(info
.gi_last_flags
)))
577 /* copy back header */
578 head
.fmh_entries
= xhead
.fmh_entries
;
579 head
.fmh_oflags
= xhead
.fmh_oflags
;
580 if (copy_to_user(arg
, &head
, sizeof(struct fsmap_head
)))
586 long ext4_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
588 struct inode
*inode
= file_inode(filp
);
589 struct super_block
*sb
= inode
->i_sb
;
590 struct ext4_inode_info
*ei
= EXT4_I(inode
);
593 ext4_debug("cmd = %u, arg = %lu\n", cmd
, arg
);
596 case FS_IOC_GETFSMAP
:
597 return ext4_ioc_getfsmap(sb
, (void __user
*)arg
);
598 case EXT4_IOC_GETFLAGS
:
599 flags
= ei
->i_flags
& EXT4_FL_USER_VISIBLE
;
600 return put_user(flags
, (int __user
*) arg
);
601 case EXT4_IOC_SETFLAGS
: {
604 if (!inode_owner_or_capable(inode
))
607 if (get_user(flags
, (int __user
*) arg
))
610 if (flags
& ~EXT4_FL_USER_VISIBLE
)
613 * chattr(1) grabs flags via GETFLAGS, modifies the result and
614 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
615 * more restrictive than just silently masking off visible but
616 * not settable flags as we always did.
618 flags
&= EXT4_FL_USER_MODIFIABLE
;
619 if (ext4_mask_flags(inode
->i_mode
, flags
) != flags
)
622 err
= mnt_want_write_file(filp
);
627 err
= ext4_ioctl_setflags(inode
, flags
);
629 mnt_drop_write_file(filp
);
632 case EXT4_IOC_GETVERSION
:
633 case EXT4_IOC_GETVERSION_OLD
:
634 return put_user(inode
->i_generation
, (int __user
*) arg
);
635 case EXT4_IOC_SETVERSION
:
636 case EXT4_IOC_SETVERSION_OLD
: {
638 struct ext4_iloc iloc
;
642 if (!inode_owner_or_capable(inode
))
645 if (ext4_has_metadata_csum(inode
->i_sb
)) {
646 ext4_warning(sb
, "Setting inode version is not "
647 "supported with metadata_csum enabled.");
651 err
= mnt_want_write_file(filp
);
654 if (get_user(generation
, (int __user
*) arg
)) {
660 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
661 if (IS_ERR(handle
)) {
662 err
= PTR_ERR(handle
);
665 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
667 inode
->i_ctime
= current_time(inode
);
668 inode
->i_generation
= generation
;
669 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
671 ext4_journal_stop(handle
);
676 mnt_drop_write_file(filp
);
679 case EXT4_IOC_GROUP_EXTEND
: {
680 ext4_fsblk_t n_blocks_count
;
683 err
= ext4_resize_begin(sb
);
687 if (get_user(n_blocks_count
, (__u32 __user
*)arg
)) {
689 goto group_extend_out
;
692 if (ext4_has_feature_bigalloc(sb
)) {
693 ext4_msg(sb
, KERN_ERR
,
694 "Online resizing not supported with bigalloc");
696 goto group_extend_out
;
699 err
= mnt_want_write_file(filp
);
701 goto group_extend_out
;
703 err
= ext4_group_extend(sb
, EXT4_SB(sb
)->s_es
, n_blocks_count
);
704 if (EXT4_SB(sb
)->s_journal
) {
705 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
706 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
707 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
711 mnt_drop_write_file(filp
);
717 case EXT4_IOC_MOVE_EXT
: {
718 struct move_extent me
;
722 if (!(filp
->f_mode
& FMODE_READ
) ||
723 !(filp
->f_mode
& FMODE_WRITE
))
726 if (copy_from_user(&me
,
727 (struct move_extent __user
*)arg
, sizeof(me
)))
731 donor
= fdget(me
.donor_fd
);
735 if (!(donor
.file
->f_mode
& FMODE_WRITE
)) {
740 if (ext4_has_feature_bigalloc(sb
)) {
741 ext4_msg(sb
, KERN_ERR
,
742 "Online defrag not supported with bigalloc");
745 } else if (IS_DAX(inode
)) {
746 ext4_msg(sb
, KERN_ERR
,
747 "Online defrag not supported with DAX");
752 err
= mnt_want_write_file(filp
);
756 err
= ext4_move_extents(filp
, donor
.file
, me
.orig_start
,
757 me
.donor_start
, me
.len
, &me
.moved_len
);
758 mnt_drop_write_file(filp
);
760 if (copy_to_user((struct move_extent __user
*)arg
,
768 case EXT4_IOC_GROUP_ADD
: {
769 struct ext4_new_group_data input
;
772 err
= ext4_resize_begin(sb
);
776 if (copy_from_user(&input
, (struct ext4_new_group_input __user
*)arg
,
782 if (ext4_has_feature_bigalloc(sb
)) {
783 ext4_msg(sb
, KERN_ERR
,
784 "Online resizing not supported with bigalloc");
789 err
= mnt_want_write_file(filp
);
793 err
= ext4_group_add(sb
, &input
);
794 if (EXT4_SB(sb
)->s_journal
) {
795 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
796 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
797 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
801 mnt_drop_write_file(filp
);
802 if (!err
&& ext4_has_group_desc_csum(sb
) &&
803 test_opt(sb
, INIT_INODE_TABLE
))
804 err
= ext4_register_li_request(sb
, input
.group
);
810 case EXT4_IOC_MIGRATE
:
813 if (!inode_owner_or_capable(inode
))
816 err
= mnt_want_write_file(filp
);
820 * inode_mutex prevent write and truncate on the file.
821 * Read still goes through. We take i_data_sem in
822 * ext4_ext_swap_inode_data before we switch the
823 * inode format to prevent read.
826 err
= ext4_ext_migrate(inode
);
827 inode_unlock((inode
));
828 mnt_drop_write_file(filp
);
832 case EXT4_IOC_ALLOC_DA_BLKS
:
835 if (!inode_owner_or_capable(inode
))
838 err
= mnt_want_write_file(filp
);
841 err
= ext4_alloc_da_blocks(inode
);
842 mnt_drop_write_file(filp
);
846 case EXT4_IOC_SWAP_BOOT
:
849 if (!(filp
->f_mode
& FMODE_WRITE
))
851 err
= mnt_want_write_file(filp
);
854 err
= swap_inode_boot_loader(sb
, inode
);
855 mnt_drop_write_file(filp
);
859 case EXT4_IOC_RESIZE_FS
: {
860 ext4_fsblk_t n_blocks_count
;
861 int err
= 0, err2
= 0;
862 ext4_group_t o_group
= EXT4_SB(sb
)->s_groups_count
;
864 if (ext4_has_feature_bigalloc(sb
)) {
865 ext4_msg(sb
, KERN_ERR
,
866 "Online resizing not (yet) supported with bigalloc");
870 if (copy_from_user(&n_blocks_count
, (__u64 __user
*)arg
,
875 err
= ext4_resize_begin(sb
);
879 err
= mnt_want_write_file(filp
);
883 err
= ext4_resize_fs(sb
, n_blocks_count
);
884 if (EXT4_SB(sb
)->s_journal
) {
885 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
886 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
887 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
891 mnt_drop_write_file(filp
);
892 if (!err
&& (o_group
> EXT4_SB(sb
)->s_groups_count
) &&
893 ext4_has_group_desc_csum(sb
) &&
894 test_opt(sb
, INIT_INODE_TABLE
))
895 err
= ext4_register_li_request(sb
, o_group
);
904 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
905 struct fstrim_range range
;
908 if (!capable(CAP_SYS_ADMIN
))
911 if (!blk_queue_discard(q
))
914 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
918 range
.minlen
= max((unsigned int)range
.minlen
,
919 q
->limits
.discard_granularity
);
920 ret
= ext4_trim_fs(sb
, &range
);
924 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
930 case EXT4_IOC_PRECACHE_EXTENTS
:
931 return ext4_ext_precache(inode
);
933 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
934 if (!ext4_has_feature_encrypt(sb
))
936 return fscrypt_ioctl_set_policy(filp
, (const void __user
*)arg
);
938 case EXT4_IOC_GET_ENCRYPTION_PWSALT
: {
939 #ifdef CONFIG_EXT4_FS_ENCRYPTION
941 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
944 if (!ext4_has_feature_encrypt(sb
))
946 if (uuid_is_zero(sbi
->s_es
->s_encrypt_pw_salt
)) {
947 err
= mnt_want_write_file(filp
);
950 handle
= ext4_journal_start_sb(sb
, EXT4_HT_MISC
, 1);
951 if (IS_ERR(handle
)) {
952 err
= PTR_ERR(handle
);
953 goto pwsalt_err_exit
;
955 err
= ext4_journal_get_write_access(handle
, sbi
->s_sbh
);
957 goto pwsalt_err_journal
;
958 generate_random_uuid(sbi
->s_es
->s_encrypt_pw_salt
);
959 err
= ext4_handle_dirty_metadata(handle
, NULL
,
962 err2
= ext4_journal_stop(handle
);
966 mnt_drop_write_file(filp
);
970 if (copy_to_user((void __user
*) arg
,
971 sbi
->s_es
->s_encrypt_pw_salt
, 16))
978 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
979 return fscrypt_ioctl_get_policy(filp
, (void __user
*)arg
);
981 case EXT4_IOC_FSGETXATTR
:
985 memset(&fa
, 0, sizeof(struct fsxattr
));
986 fa
.fsx_xflags
= ext4_iflags_to_xflags(ei
->i_flags
& EXT4_FL_USER_VISIBLE
);
988 if (ext4_has_feature_project(inode
->i_sb
)) {
989 fa
.fsx_projid
= (__u32
)from_kprojid(&init_user_ns
,
990 EXT4_I(inode
)->i_projid
);
993 if (copy_to_user((struct fsxattr __user
*)arg
,
998 case EXT4_IOC_FSSETXATTR
:
1003 if (copy_from_user(&fa
, (struct fsxattr __user
*)arg
,
1007 /* Make sure caller has proper permission */
1008 if (!inode_owner_or_capable(inode
))
1011 if (fa
.fsx_xflags
& ~EXT4_SUPPORTED_FS_XFLAGS
)
1014 flags
= ext4_xflags_to_iflags(fa
.fsx_xflags
);
1015 if (ext4_mask_flags(inode
->i_mode
, flags
) != flags
)
1018 err
= mnt_want_write_file(filp
);
1023 flags
= (ei
->i_flags
& ~EXT4_FL_XFLAG_VISIBLE
) |
1024 (flags
& EXT4_FL_XFLAG_VISIBLE
);
1025 err
= ext4_ioctl_setflags(inode
, flags
);
1026 inode_unlock(inode
);
1027 mnt_drop_write_file(filp
);
1031 err
= ext4_ioctl_setproject(filp
, fa
.fsx_projid
);
1037 case EXT4_IOC_SHUTDOWN
:
1038 return ext4_shutdown(sb
, arg
);
1044 #ifdef CONFIG_COMPAT
1045 long ext4_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1047 /* These are just misnamed, they actually get/put from/to user an int */
1049 case EXT4_IOC32_GETFLAGS
:
1050 cmd
= EXT4_IOC_GETFLAGS
;
1052 case EXT4_IOC32_SETFLAGS
:
1053 cmd
= EXT4_IOC_SETFLAGS
;
1055 case EXT4_IOC32_GETVERSION
:
1056 cmd
= EXT4_IOC_GETVERSION
;
1058 case EXT4_IOC32_SETVERSION
:
1059 cmd
= EXT4_IOC_SETVERSION
;
1061 case EXT4_IOC32_GROUP_EXTEND
:
1062 cmd
= EXT4_IOC_GROUP_EXTEND
;
1064 case EXT4_IOC32_GETVERSION_OLD
:
1065 cmd
= EXT4_IOC_GETVERSION_OLD
;
1067 case EXT4_IOC32_SETVERSION_OLD
:
1068 cmd
= EXT4_IOC_SETVERSION_OLD
;
1070 case EXT4_IOC32_GETRSVSZ
:
1071 cmd
= EXT4_IOC_GETRSVSZ
;
1073 case EXT4_IOC32_SETRSVSZ
:
1074 cmd
= EXT4_IOC_SETRSVSZ
;
1076 case EXT4_IOC32_GROUP_ADD
: {
1077 struct compat_ext4_new_group_input __user
*uinput
;
1078 struct ext4_new_group_input input
;
1079 mm_segment_t old_fs
;
1082 uinput
= compat_ptr(arg
);
1083 err
= get_user(input
.group
, &uinput
->group
);
1084 err
|= get_user(input
.block_bitmap
, &uinput
->block_bitmap
);
1085 err
|= get_user(input
.inode_bitmap
, &uinput
->inode_bitmap
);
1086 err
|= get_user(input
.inode_table
, &uinput
->inode_table
);
1087 err
|= get_user(input
.blocks_count
, &uinput
->blocks_count
);
1088 err
|= get_user(input
.reserved_blocks
,
1089 &uinput
->reserved_blocks
);
1094 err
= ext4_ioctl(file
, EXT4_IOC_GROUP_ADD
,
1095 (unsigned long) &input
);
1099 case EXT4_IOC_MOVE_EXT
:
1100 case EXT4_IOC_RESIZE_FS
:
1101 case EXT4_IOC_PRECACHE_EXTENTS
:
1102 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
1103 case EXT4_IOC_GET_ENCRYPTION_PWSALT
:
1104 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
1105 case EXT4_IOC_SHUTDOWN
:
1106 case FS_IOC_GETFSMAP
:
1109 return -ENOIOCTLCMD
;
1111 return ext4_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));