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 memswap(&inode1
->i_flags
, &inode2
->i_flags
, sizeof(inode1
->i_flags
));
68 memswap(&inode1
->i_version
, &inode2
->i_version
,
69 sizeof(inode1
->i_version
));
70 memswap(&inode1
->i_blocks
, &inode2
->i_blocks
,
71 sizeof(inode1
->i_blocks
));
72 memswap(&inode1
->i_bytes
, &inode2
->i_bytes
, sizeof(inode1
->i_bytes
));
73 memswap(&inode1
->i_atime
, &inode2
->i_atime
, sizeof(inode1
->i_atime
));
74 memswap(&inode1
->i_mtime
, &inode2
->i_mtime
, sizeof(inode1
->i_mtime
));
76 memswap(ei1
->i_data
, ei2
->i_data
, sizeof(ei1
->i_data
));
77 memswap(&ei1
->i_flags
, &ei2
->i_flags
, sizeof(ei1
->i_flags
));
78 memswap(&ei1
->i_disksize
, &ei2
->i_disksize
, sizeof(ei1
->i_disksize
));
79 ext4_es_remove_extent(inode1
, 0, EXT_MAX_BLOCKS
);
80 ext4_es_remove_extent(inode2
, 0, EXT_MAX_BLOCKS
);
82 isize
= i_size_read(inode1
);
83 i_size_write(inode1
, i_size_read(inode2
));
84 i_size_write(inode2
, isize
);
88 * Swap the information from the given @inode and the inode
89 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
90 * important fields of the inodes.
92 * @sb: the super block of the filesystem
93 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
96 static long swap_inode_boot_loader(struct super_block
*sb
,
101 struct inode
*inode_bl
;
102 struct ext4_inode_info
*ei_bl
;
103 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
105 if (inode
->i_nlink
!= 1 || !S_ISREG(inode
->i_mode
))
108 if (!inode_owner_or_capable(inode
) || !capable(CAP_SYS_ADMIN
))
111 inode_bl
= ext4_iget(sb
, EXT4_BOOT_LOADER_INO
);
112 if (IS_ERR(inode_bl
))
113 return PTR_ERR(inode_bl
);
114 ei_bl
= EXT4_I(inode_bl
);
116 filemap_flush(inode
->i_mapping
);
117 filemap_flush(inode_bl
->i_mapping
);
119 /* Protect orig inodes against a truncate and make sure,
120 * that only 1 swap_inode_boot_loader is running. */
121 lock_two_nondirectories(inode
, inode_bl
);
123 truncate_inode_pages(&inode
->i_data
, 0);
124 truncate_inode_pages(&inode_bl
->i_data
, 0);
126 /* Wait for all existing dio workers */
127 ext4_inode_block_unlocked_dio(inode
);
128 ext4_inode_block_unlocked_dio(inode_bl
);
129 inode_dio_wait(inode
);
130 inode_dio_wait(inode_bl
);
132 handle
= ext4_journal_start(inode_bl
, EXT4_HT_MOVE_EXTENTS
, 2);
133 if (IS_ERR(handle
)) {
135 goto journal_err_out
;
138 /* Protect extent tree against block allocations via delalloc */
139 ext4_double_down_write_data_sem(inode
, inode_bl
);
141 if (inode_bl
->i_nlink
== 0) {
142 /* this inode has never been used as a BOOT_LOADER */
143 set_nlink(inode_bl
, 1);
144 i_uid_write(inode_bl
, 0);
145 i_gid_write(inode_bl
, 0);
146 inode_bl
->i_flags
= 0;
148 inode_bl
->i_version
= 1;
149 i_size_write(inode_bl
, 0);
150 inode_bl
->i_mode
= S_IFREG
;
151 if (ext4_has_feature_extents(sb
)) {
152 ext4_set_inode_flag(inode_bl
, EXT4_INODE_EXTENTS
);
153 ext4_ext_tree_init(handle
, inode_bl
);
155 memset(ei_bl
->i_data
, 0, sizeof(ei_bl
->i_data
));
158 swap_inode_data(inode
, inode_bl
);
160 inode
->i_ctime
= inode_bl
->i_ctime
= current_time(inode
);
162 spin_lock(&sbi
->s_next_gen_lock
);
163 inode
->i_generation
= sbi
->s_next_generation
++;
164 inode_bl
->i_generation
= sbi
->s_next_generation
++;
165 spin_unlock(&sbi
->s_next_gen_lock
);
167 ext4_discard_preallocations(inode
);
169 err
= ext4_mark_inode_dirty(handle
, inode
);
171 ext4_warning(inode
->i_sb
,
172 "couldn't mark inode #%lu dirty (err %d)",
174 /* Revert all changes: */
175 swap_inode_data(inode
, inode_bl
);
177 err
= ext4_mark_inode_dirty(handle
, inode_bl
);
179 ext4_warning(inode_bl
->i_sb
,
180 "couldn't mark inode #%lu dirty (err %d)",
181 inode_bl
->i_ino
, err
);
182 /* Revert all changes: */
183 swap_inode_data(inode
, inode_bl
);
184 ext4_mark_inode_dirty(handle
, inode
);
187 ext4_journal_stop(handle
);
188 ext4_double_up_write_data_sem(inode
, inode_bl
);
191 ext4_inode_resume_unlocked_dio(inode
);
192 ext4_inode_resume_unlocked_dio(inode_bl
);
193 unlock_two_nondirectories(inode
, inode_bl
);
198 #ifdef CONFIG_EXT4_FS_ENCRYPTION
199 static int uuid_is_zero(__u8 u
[16])
203 for (i
= 0; i
< 16; i
++)
210 static int ext4_ioctl_setflags(struct inode
*inode
,
213 struct ext4_inode_info
*ei
= EXT4_I(inode
);
214 handle_t
*handle
= NULL
;
215 int err
= -EPERM
, migrate
= 0;
216 struct ext4_iloc iloc
;
217 unsigned int oldflags
, mask
, i
;
220 /* Is it quota file? Do not allow user to mess with it */
221 if (ext4_is_quota_file(inode
))
224 oldflags
= ei
->i_flags
;
226 /* The JOURNAL_DATA flag is modifiable only by root */
227 jflag
= flags
& EXT4_JOURNAL_DATA_FL
;
230 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
231 * the relevant capability.
233 * This test looks nicer. Thanks to Pauline Middelink
235 if ((flags
^ oldflags
) & (EXT4_APPEND_FL
| EXT4_IMMUTABLE_FL
)) {
236 if (!capable(CAP_LINUX_IMMUTABLE
))
241 * The JOURNAL_DATA flag can only be changed by
242 * the relevant capability.
244 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
)) {
245 if (!capable(CAP_SYS_RESOURCE
))
248 if ((flags
^ oldflags
) & EXT4_EXTENTS_FL
)
251 if (flags
& EXT4_EOFBLOCKS_FL
) {
252 /* we don't support adding EOFBLOCKS flag */
253 if (!(oldflags
& EXT4_EOFBLOCKS_FL
)) {
257 } else if (oldflags
& EXT4_EOFBLOCKS_FL
) {
258 err
= ext4_truncate(inode
);
263 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
264 if (IS_ERR(handle
)) {
265 err
= PTR_ERR(handle
);
269 ext4_handle_sync(handle
);
270 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
274 for (i
= 0, mask
= 1; i
< 32; i
++, mask
<<= 1) {
275 if (!(mask
& EXT4_FL_USER_MODIFIABLE
))
277 /* These flags get special treatment later */
278 if (mask
== EXT4_JOURNAL_DATA_FL
|| mask
== EXT4_EXTENTS_FL
)
281 ext4_set_inode_flag(inode
, i
);
283 ext4_clear_inode_flag(inode
, i
);
286 ext4_set_inode_flags(inode
);
287 inode
->i_ctime
= current_time(inode
);
289 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
291 ext4_journal_stop(handle
);
295 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
))
296 err
= ext4_change_inode_journal_flag(inode
, jflag
);
300 if (flags
& EXT4_EXTENTS_FL
)
301 err
= ext4_ext_migrate(inode
);
303 err
= ext4_ind_migrate(inode
);
311 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
313 struct inode
*inode
= file_inode(filp
);
314 struct super_block
*sb
= inode
->i_sb
;
315 struct ext4_inode_info
*ei
= EXT4_I(inode
);
319 struct ext4_iloc iloc
;
320 struct ext4_inode
*raw_inode
;
321 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
323 if (!ext4_has_feature_project(sb
)) {
324 if (projid
!= EXT4_DEF_PROJID
)
330 if (EXT4_INODE_SIZE(sb
) <= EXT4_GOOD_OLD_INODE_SIZE
)
333 kprojid
= make_kprojid(&init_user_ns
, (projid_t
)projid
);
335 if (projid_eq(kprojid
, EXT4_I(inode
)->i_projid
))
338 err
= mnt_want_write_file(filp
);
344 /* Is it quota file? Do not allow user to mess with it */
345 if (ext4_is_quota_file(inode
))
348 err
= ext4_get_inode_loc(inode
, &iloc
);
352 raw_inode
= ext4_raw_inode(&iloc
);
353 if (!EXT4_FITS_IN_INODE(raw_inode
, ei
, i_projid
)) {
360 dquot_initialize(inode
);
362 handle
= ext4_journal_start(inode
, EXT4_HT_QUOTA
,
363 EXT4_QUOTA_INIT_BLOCKS(sb
) +
364 EXT4_QUOTA_DEL_BLOCKS(sb
) + 3);
365 if (IS_ERR(handle
)) {
366 err
= PTR_ERR(handle
);
370 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
374 transfer_to
[PRJQUOTA
] = dqget(sb
, make_kqid_projid(kprojid
));
375 if (!IS_ERR(transfer_to
[PRJQUOTA
])) {
377 /* __dquot_transfer() calls back ext4_get_inode_usage() which
378 * counts xattr inode references.
380 down_read(&EXT4_I(inode
)->xattr_sem
);
381 err
= __dquot_transfer(inode
, transfer_to
);
382 up_read(&EXT4_I(inode
)->xattr_sem
);
383 dqput(transfer_to
[PRJQUOTA
]);
388 EXT4_I(inode
)->i_projid
= kprojid
;
389 inode
->i_ctime
= current_time(inode
);
391 rc
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
395 ext4_journal_stop(handle
);
398 mnt_drop_write_file(filp
);
402 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
404 if (projid
!= EXT4_DEF_PROJID
)
410 /* Transfer internal flags to xflags */
411 static inline __u32
ext4_iflags_to_xflags(unsigned long iflags
)
415 if (iflags
& EXT4_SYNC_FL
)
416 xflags
|= FS_XFLAG_SYNC
;
417 if (iflags
& EXT4_IMMUTABLE_FL
)
418 xflags
|= FS_XFLAG_IMMUTABLE
;
419 if (iflags
& EXT4_APPEND_FL
)
420 xflags
|= FS_XFLAG_APPEND
;
421 if (iflags
& EXT4_NODUMP_FL
)
422 xflags
|= FS_XFLAG_NODUMP
;
423 if (iflags
& EXT4_NOATIME_FL
)
424 xflags
|= FS_XFLAG_NOATIME
;
425 if (iflags
& EXT4_PROJINHERIT_FL
)
426 xflags
|= FS_XFLAG_PROJINHERIT
;
430 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
431 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
432 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
434 /* Transfer xflags flags to internal */
435 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags
)
437 unsigned long iflags
= 0;
439 if (xflags
& FS_XFLAG_SYNC
)
440 iflags
|= EXT4_SYNC_FL
;
441 if (xflags
& FS_XFLAG_IMMUTABLE
)
442 iflags
|= EXT4_IMMUTABLE_FL
;
443 if (xflags
& FS_XFLAG_APPEND
)
444 iflags
|= EXT4_APPEND_FL
;
445 if (xflags
& FS_XFLAG_NODUMP
)
446 iflags
|= EXT4_NODUMP_FL
;
447 if (xflags
& FS_XFLAG_NOATIME
)
448 iflags
|= EXT4_NOATIME_FL
;
449 if (xflags
& FS_XFLAG_PROJINHERIT
)
450 iflags
|= EXT4_PROJINHERIT_FL
;
455 static int ext4_shutdown(struct super_block
*sb
, unsigned long arg
)
457 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
460 if (!capable(CAP_SYS_ADMIN
))
463 if (get_user(flags
, (__u32 __user
*)arg
))
466 if (flags
> EXT4_GOING_FLAGS_NOLOGFLUSH
)
469 if (ext4_forced_shutdown(sbi
))
472 ext4_msg(sb
, KERN_ALERT
, "shut down requested (%d)", flags
);
475 case EXT4_GOING_FLAGS_DEFAULT
:
476 freeze_bdev(sb
->s_bdev
);
477 set_bit(EXT4_FLAGS_SHUTDOWN
, &sbi
->s_ext4_flags
);
478 thaw_bdev(sb
->s_bdev
, sb
);
480 case EXT4_GOING_FLAGS_LOGFLUSH
:
481 set_bit(EXT4_FLAGS_SHUTDOWN
, &sbi
->s_ext4_flags
);
482 if (sbi
->s_journal
&& !is_journal_aborted(sbi
->s_journal
)) {
483 (void) ext4_force_commit(sb
);
484 jbd2_journal_abort(sbi
->s_journal
, 0);
487 case EXT4_GOING_FLAGS_NOLOGFLUSH
:
488 set_bit(EXT4_FLAGS_SHUTDOWN
, &sbi
->s_ext4_flags
);
489 if (sbi
->s_journal
&& !is_journal_aborted(sbi
->s_journal
)) {
491 jbd2_journal_abort(sbi
->s_journal
, 0);
497 clear_opt(sb
, DISCARD
);
501 struct getfsmap_info
{
502 struct super_block
*gi_sb
;
503 struct fsmap_head __user
*gi_data
;
508 static int ext4_getfsmap_format(struct ext4_fsmap
*xfm
, void *priv
)
510 struct getfsmap_info
*info
= priv
;
513 trace_ext4_getfsmap_mapping(info
->gi_sb
, xfm
);
515 info
->gi_last_flags
= xfm
->fmr_flags
;
516 ext4_fsmap_from_internal(info
->gi_sb
, &fm
, xfm
);
517 if (copy_to_user(&info
->gi_data
->fmh_recs
[info
->gi_idx
++], &fm
,
518 sizeof(struct fsmap
)))
524 static int ext4_ioc_getfsmap(struct super_block
*sb
,
525 struct fsmap_head __user
*arg
)
527 struct getfsmap_info info
= {0};
528 struct ext4_fsmap_head xhead
= {0};
529 struct fsmap_head head
;
530 bool aborted
= false;
533 if (copy_from_user(&head
, arg
, sizeof(struct fsmap_head
)))
535 if (memchr_inv(head
.fmh_reserved
, 0, sizeof(head
.fmh_reserved
)) ||
536 memchr_inv(head
.fmh_keys
[0].fmr_reserved
, 0,
537 sizeof(head
.fmh_keys
[0].fmr_reserved
)) ||
538 memchr_inv(head
.fmh_keys
[1].fmr_reserved
, 0,
539 sizeof(head
.fmh_keys
[1].fmr_reserved
)))
542 * ext4 doesn't report file extents at all, so the only valid
543 * file offsets are the magic ones (all zeroes or all ones).
545 if (head
.fmh_keys
[0].fmr_offset
||
546 (head
.fmh_keys
[1].fmr_offset
!= 0 &&
547 head
.fmh_keys
[1].fmr_offset
!= -1ULL))
550 xhead
.fmh_iflags
= head
.fmh_iflags
;
551 xhead
.fmh_count
= head
.fmh_count
;
552 ext4_fsmap_to_internal(sb
, &xhead
.fmh_keys
[0], &head
.fmh_keys
[0]);
553 ext4_fsmap_to_internal(sb
, &xhead
.fmh_keys
[1], &head
.fmh_keys
[1]);
555 trace_ext4_getfsmap_low_key(sb
, &xhead
.fmh_keys
[0]);
556 trace_ext4_getfsmap_high_key(sb
, &xhead
.fmh_keys
[1]);
560 error
= ext4_getfsmap(sb
, &xhead
, ext4_getfsmap_format
, &info
);
561 if (error
== EXT4_QUERY_RANGE_ABORT
) {
567 /* If we didn't abort, set the "last" flag in the last fmx */
568 if (!aborted
&& info
.gi_idx
) {
569 info
.gi_last_flags
|= FMR_OF_LAST
;
570 if (copy_to_user(&info
.gi_data
->fmh_recs
[info
.gi_idx
- 1].fmr_flags
,
572 sizeof(info
.gi_last_flags
)))
576 /* copy back header */
577 head
.fmh_entries
= xhead
.fmh_entries
;
578 head
.fmh_oflags
= xhead
.fmh_oflags
;
579 if (copy_to_user(arg
, &head
, sizeof(struct fsmap_head
)))
585 long ext4_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
587 struct inode
*inode
= file_inode(filp
);
588 struct super_block
*sb
= inode
->i_sb
;
589 struct ext4_inode_info
*ei
= EXT4_I(inode
);
592 ext4_debug("cmd = %u, arg = %lu\n", cmd
, arg
);
595 case FS_IOC_GETFSMAP
:
596 return ext4_ioc_getfsmap(sb
, (void __user
*)arg
);
597 case EXT4_IOC_GETFLAGS
:
598 flags
= ei
->i_flags
& EXT4_FL_USER_VISIBLE
;
599 return put_user(flags
, (int __user
*) arg
);
600 case EXT4_IOC_SETFLAGS
: {
603 if (!inode_owner_or_capable(inode
))
606 if (get_user(flags
, (int __user
*) arg
))
609 if (flags
& ~EXT4_FL_USER_VISIBLE
)
612 * chattr(1) grabs flags via GETFLAGS, modifies the result and
613 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
614 * more restrictive than just silently masking off visible but
615 * not settable flags as we always did.
617 flags
&= EXT4_FL_USER_MODIFIABLE
;
618 if (ext4_mask_flags(inode
->i_mode
, flags
) != flags
)
621 err
= mnt_want_write_file(filp
);
626 err
= ext4_ioctl_setflags(inode
, flags
);
628 mnt_drop_write_file(filp
);
631 case EXT4_IOC_GETVERSION
:
632 case EXT4_IOC_GETVERSION_OLD
:
633 return put_user(inode
->i_generation
, (int __user
*) arg
);
634 case EXT4_IOC_SETVERSION
:
635 case EXT4_IOC_SETVERSION_OLD
: {
637 struct ext4_iloc iloc
;
641 if (!inode_owner_or_capable(inode
))
644 if (ext4_has_metadata_csum(inode
->i_sb
)) {
645 ext4_warning(sb
, "Setting inode version is not "
646 "supported with metadata_csum enabled.");
650 err
= mnt_want_write_file(filp
);
653 if (get_user(generation
, (int __user
*) arg
)) {
659 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
660 if (IS_ERR(handle
)) {
661 err
= PTR_ERR(handle
);
664 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
666 inode
->i_ctime
= current_time(inode
);
667 inode
->i_generation
= generation
;
668 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
670 ext4_journal_stop(handle
);
675 mnt_drop_write_file(filp
);
678 case EXT4_IOC_GROUP_EXTEND
: {
679 ext4_fsblk_t n_blocks_count
;
682 err
= ext4_resize_begin(sb
);
686 if (get_user(n_blocks_count
, (__u32 __user
*)arg
)) {
688 goto group_extend_out
;
691 if (ext4_has_feature_bigalloc(sb
)) {
692 ext4_msg(sb
, KERN_ERR
,
693 "Online resizing not supported with bigalloc");
695 goto group_extend_out
;
698 err
= mnt_want_write_file(filp
);
700 goto group_extend_out
;
702 err
= ext4_group_extend(sb
, EXT4_SB(sb
)->s_es
, n_blocks_count
);
703 if (EXT4_SB(sb
)->s_journal
) {
704 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
705 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
706 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
710 mnt_drop_write_file(filp
);
716 case EXT4_IOC_MOVE_EXT
: {
717 struct move_extent me
;
721 if (!(filp
->f_mode
& FMODE_READ
) ||
722 !(filp
->f_mode
& FMODE_WRITE
))
725 if (copy_from_user(&me
,
726 (struct move_extent __user
*)arg
, sizeof(me
)))
730 donor
= fdget(me
.donor_fd
);
734 if (!(donor
.file
->f_mode
& FMODE_WRITE
)) {
739 if (ext4_has_feature_bigalloc(sb
)) {
740 ext4_msg(sb
, KERN_ERR
,
741 "Online defrag not supported with bigalloc");
744 } else if (IS_DAX(inode
)) {
745 ext4_msg(sb
, KERN_ERR
,
746 "Online defrag not supported with DAX");
751 err
= mnt_want_write_file(filp
);
755 err
= ext4_move_extents(filp
, donor
.file
, me
.orig_start
,
756 me
.donor_start
, me
.len
, &me
.moved_len
);
757 mnt_drop_write_file(filp
);
759 if (copy_to_user((struct move_extent __user
*)arg
,
767 case EXT4_IOC_GROUP_ADD
: {
768 struct ext4_new_group_data input
;
771 err
= ext4_resize_begin(sb
);
775 if (copy_from_user(&input
, (struct ext4_new_group_input __user
*)arg
,
781 if (ext4_has_feature_bigalloc(sb
)) {
782 ext4_msg(sb
, KERN_ERR
,
783 "Online resizing not supported with bigalloc");
788 err
= mnt_want_write_file(filp
);
792 err
= ext4_group_add(sb
, &input
);
793 if (EXT4_SB(sb
)->s_journal
) {
794 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
795 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
796 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
800 mnt_drop_write_file(filp
);
801 if (!err
&& ext4_has_group_desc_csum(sb
) &&
802 test_opt(sb
, INIT_INODE_TABLE
))
803 err
= ext4_register_li_request(sb
, input
.group
);
809 case EXT4_IOC_MIGRATE
:
812 if (!inode_owner_or_capable(inode
))
815 err
= mnt_want_write_file(filp
);
819 * inode_mutex prevent write and truncate on the file.
820 * Read still goes through. We take i_data_sem in
821 * ext4_ext_swap_inode_data before we switch the
822 * inode format to prevent read.
825 err
= ext4_ext_migrate(inode
);
826 inode_unlock((inode
));
827 mnt_drop_write_file(filp
);
831 case EXT4_IOC_ALLOC_DA_BLKS
:
834 if (!inode_owner_or_capable(inode
))
837 err
= mnt_want_write_file(filp
);
840 err
= ext4_alloc_da_blocks(inode
);
841 mnt_drop_write_file(filp
);
845 case EXT4_IOC_SWAP_BOOT
:
848 if (!(filp
->f_mode
& FMODE_WRITE
))
850 err
= mnt_want_write_file(filp
);
853 err
= swap_inode_boot_loader(sb
, inode
);
854 mnt_drop_write_file(filp
);
858 case EXT4_IOC_RESIZE_FS
: {
859 ext4_fsblk_t n_blocks_count
;
860 int err
= 0, err2
= 0;
861 ext4_group_t o_group
= EXT4_SB(sb
)->s_groups_count
;
863 if (ext4_has_feature_bigalloc(sb
)) {
864 ext4_msg(sb
, KERN_ERR
,
865 "Online resizing not (yet) supported with bigalloc");
869 if (copy_from_user(&n_blocks_count
, (__u64 __user
*)arg
,
874 err
= ext4_resize_begin(sb
);
878 err
= mnt_want_write_file(filp
);
882 err
= ext4_resize_fs(sb
, n_blocks_count
);
883 if (EXT4_SB(sb
)->s_journal
) {
884 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
885 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
886 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
890 mnt_drop_write_file(filp
);
891 if (!err
&& (o_group
> EXT4_SB(sb
)->s_groups_count
) &&
892 ext4_has_group_desc_csum(sb
) &&
893 test_opt(sb
, INIT_INODE_TABLE
))
894 err
= ext4_register_li_request(sb
, o_group
);
903 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
904 struct fstrim_range range
;
907 if (!capable(CAP_SYS_ADMIN
))
910 if (!blk_queue_discard(q
))
913 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
917 range
.minlen
= max((unsigned int)range
.minlen
,
918 q
->limits
.discard_granularity
);
919 ret
= ext4_trim_fs(sb
, &range
);
923 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
929 case EXT4_IOC_PRECACHE_EXTENTS
:
930 return ext4_ext_precache(inode
);
932 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
933 if (!ext4_has_feature_encrypt(sb
))
935 return fscrypt_ioctl_set_policy(filp
, (const void __user
*)arg
);
937 case EXT4_IOC_GET_ENCRYPTION_PWSALT
: {
938 #ifdef CONFIG_EXT4_FS_ENCRYPTION
940 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
943 if (!ext4_has_feature_encrypt(sb
))
945 if (uuid_is_zero(sbi
->s_es
->s_encrypt_pw_salt
)) {
946 err
= mnt_want_write_file(filp
);
949 handle
= ext4_journal_start_sb(sb
, EXT4_HT_MISC
, 1);
950 if (IS_ERR(handle
)) {
951 err
= PTR_ERR(handle
);
952 goto pwsalt_err_exit
;
954 err
= ext4_journal_get_write_access(handle
, sbi
->s_sbh
);
956 goto pwsalt_err_journal
;
957 generate_random_uuid(sbi
->s_es
->s_encrypt_pw_salt
);
958 err
= ext4_handle_dirty_metadata(handle
, NULL
,
961 err2
= ext4_journal_stop(handle
);
965 mnt_drop_write_file(filp
);
969 if (copy_to_user((void __user
*) arg
,
970 sbi
->s_es
->s_encrypt_pw_salt
, 16))
977 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
978 return fscrypt_ioctl_get_policy(filp
, (void __user
*)arg
);
980 case EXT4_IOC_FSGETXATTR
:
984 memset(&fa
, 0, sizeof(struct fsxattr
));
985 fa
.fsx_xflags
= ext4_iflags_to_xflags(ei
->i_flags
& EXT4_FL_USER_VISIBLE
);
987 if (ext4_has_feature_project(inode
->i_sb
)) {
988 fa
.fsx_projid
= (__u32
)from_kprojid(&init_user_ns
,
989 EXT4_I(inode
)->i_projid
);
992 if (copy_to_user((struct fsxattr __user
*)arg
,
997 case EXT4_IOC_FSSETXATTR
:
1002 if (copy_from_user(&fa
, (struct fsxattr __user
*)arg
,
1006 /* Make sure caller has proper permission */
1007 if (!inode_owner_or_capable(inode
))
1010 if (fa
.fsx_xflags
& ~EXT4_SUPPORTED_FS_XFLAGS
)
1013 flags
= ext4_xflags_to_iflags(fa
.fsx_xflags
);
1014 if (ext4_mask_flags(inode
->i_mode
, flags
) != flags
)
1017 err
= mnt_want_write_file(filp
);
1022 flags
= (ei
->i_flags
& ~EXT4_FL_XFLAG_VISIBLE
) |
1023 (flags
& EXT4_FL_XFLAG_VISIBLE
);
1024 err
= ext4_ioctl_setflags(inode
, flags
);
1025 inode_unlock(inode
);
1026 mnt_drop_write_file(filp
);
1030 err
= ext4_ioctl_setproject(filp
, fa
.fsx_projid
);
1036 case EXT4_IOC_SHUTDOWN
:
1037 return ext4_shutdown(sb
, arg
);
1043 #ifdef CONFIG_COMPAT
1044 long ext4_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1046 /* These are just misnamed, they actually get/put from/to user an int */
1048 case EXT4_IOC32_GETFLAGS
:
1049 cmd
= EXT4_IOC_GETFLAGS
;
1051 case EXT4_IOC32_SETFLAGS
:
1052 cmd
= EXT4_IOC_SETFLAGS
;
1054 case EXT4_IOC32_GETVERSION
:
1055 cmd
= EXT4_IOC_GETVERSION
;
1057 case EXT4_IOC32_SETVERSION
:
1058 cmd
= EXT4_IOC_SETVERSION
;
1060 case EXT4_IOC32_GROUP_EXTEND
:
1061 cmd
= EXT4_IOC_GROUP_EXTEND
;
1063 case EXT4_IOC32_GETVERSION_OLD
:
1064 cmd
= EXT4_IOC_GETVERSION_OLD
;
1066 case EXT4_IOC32_SETVERSION_OLD
:
1067 cmd
= EXT4_IOC_SETVERSION_OLD
;
1069 case EXT4_IOC32_GETRSVSZ
:
1070 cmd
= EXT4_IOC_GETRSVSZ
;
1072 case EXT4_IOC32_SETRSVSZ
:
1073 cmd
= EXT4_IOC_SETRSVSZ
;
1075 case EXT4_IOC32_GROUP_ADD
: {
1076 struct compat_ext4_new_group_input __user
*uinput
;
1077 struct ext4_new_group_input input
;
1078 mm_segment_t old_fs
;
1081 uinput
= compat_ptr(arg
);
1082 err
= get_user(input
.group
, &uinput
->group
);
1083 err
|= get_user(input
.block_bitmap
, &uinput
->block_bitmap
);
1084 err
|= get_user(input
.inode_bitmap
, &uinput
->inode_bitmap
);
1085 err
|= get_user(input
.inode_table
, &uinput
->inode_table
);
1086 err
|= get_user(input
.blocks_count
, &uinput
->blocks_count
);
1087 err
|= get_user(input
.reserved_blocks
,
1088 &uinput
->reserved_blocks
);
1093 err
= ext4_ioctl(file
, EXT4_IOC_GROUP_ADD
,
1094 (unsigned long) &input
);
1098 case EXT4_IOC_MOVE_EXT
:
1099 case EXT4_IOC_RESIZE_FS
:
1100 case EXT4_IOC_PRECACHE_EXTENTS
:
1101 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
1102 case EXT4_IOC_GET_ENCRYPTION_PWSALT
:
1103 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
1104 case EXT4_IOC_SHUTDOWN
:
1105 case FS_IOC_GETFSMAP
:
1108 return -ENOIOCTLCMD
;
1110 return ext4_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));