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 "ext4_jbd2.h"
23 * Swap memory between @a and @b for @len bytes.
25 * @a: pointer to first memory area
26 * @b: pointer to second memory area
27 * @len: number of bytes to swap
30 static void memswap(void *a
, void *b
, size_t len
)
32 unsigned char *ap
, *bp
;
34 ap
= (unsigned char *)a
;
35 bp
= (unsigned char *)b
;
44 * Swap i_data and associated attributes between @inode1 and @inode2.
45 * This function is used for the primary swap between inode1 and inode2
46 * and also to revert this primary swap in case of errors.
48 * Therefore you have to make sure, that calling this method twice
49 * will revert all changes.
51 * @inode1: pointer to first inode
52 * @inode2: pointer to second inode
54 static void swap_inode_data(struct inode
*inode1
, struct inode
*inode2
)
57 struct ext4_inode_info
*ei1
;
58 struct ext4_inode_info
*ei2
;
63 memswap(&inode1
->i_flags
, &inode2
->i_flags
, sizeof(inode1
->i_flags
));
64 memswap(&inode1
->i_version
, &inode2
->i_version
,
65 sizeof(inode1
->i_version
));
66 memswap(&inode1
->i_blocks
, &inode2
->i_blocks
,
67 sizeof(inode1
->i_blocks
));
68 memswap(&inode1
->i_bytes
, &inode2
->i_bytes
, sizeof(inode1
->i_bytes
));
69 memswap(&inode1
->i_atime
, &inode2
->i_atime
, sizeof(inode1
->i_atime
));
70 memswap(&inode1
->i_mtime
, &inode2
->i_mtime
, sizeof(inode1
->i_mtime
));
72 memswap(ei1
->i_data
, ei2
->i_data
, sizeof(ei1
->i_data
));
73 memswap(&ei1
->i_flags
, &ei2
->i_flags
, sizeof(ei1
->i_flags
));
74 memswap(&ei1
->i_disksize
, &ei2
->i_disksize
, sizeof(ei1
->i_disksize
));
75 ext4_es_remove_extent(inode1
, 0, EXT_MAX_BLOCKS
);
76 ext4_es_remove_extent(inode2
, 0, EXT_MAX_BLOCKS
);
78 isize
= i_size_read(inode1
);
79 i_size_write(inode1
, i_size_read(inode2
));
80 i_size_write(inode2
, isize
);
84 * Swap the information from the given @inode and the inode
85 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
86 * important fields of the inodes.
88 * @sb: the super block of the filesystem
89 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
92 static long swap_inode_boot_loader(struct super_block
*sb
,
97 struct inode
*inode_bl
;
98 struct ext4_inode_info
*ei_bl
;
99 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
101 if (inode
->i_nlink
!= 1 || !S_ISREG(inode
->i_mode
))
104 if (!inode_owner_or_capable(inode
) || !capable(CAP_SYS_ADMIN
))
107 inode_bl
= ext4_iget(sb
, EXT4_BOOT_LOADER_INO
);
108 if (IS_ERR(inode_bl
))
109 return PTR_ERR(inode_bl
);
110 ei_bl
= EXT4_I(inode_bl
);
112 filemap_flush(inode
->i_mapping
);
113 filemap_flush(inode_bl
->i_mapping
);
115 /* Protect orig inodes against a truncate and make sure,
116 * that only 1 swap_inode_boot_loader is running. */
117 lock_two_nondirectories(inode
, inode_bl
);
119 truncate_inode_pages(&inode
->i_data
, 0);
120 truncate_inode_pages(&inode_bl
->i_data
, 0);
122 /* Wait for all existing dio workers */
123 ext4_inode_block_unlocked_dio(inode
);
124 ext4_inode_block_unlocked_dio(inode_bl
);
125 inode_dio_wait(inode
);
126 inode_dio_wait(inode_bl
);
128 handle
= ext4_journal_start(inode_bl
, EXT4_HT_MOVE_EXTENTS
, 2);
129 if (IS_ERR(handle
)) {
131 goto journal_err_out
;
134 /* Protect extent tree against block allocations via delalloc */
135 ext4_double_down_write_data_sem(inode
, inode_bl
);
137 if (inode_bl
->i_nlink
== 0) {
138 /* this inode has never been used as a BOOT_LOADER */
139 set_nlink(inode_bl
, 1);
140 i_uid_write(inode_bl
, 0);
141 i_gid_write(inode_bl
, 0);
142 inode_bl
->i_flags
= 0;
144 inode_bl
->i_version
= 1;
145 i_size_write(inode_bl
, 0);
146 inode_bl
->i_mode
= S_IFREG
;
147 if (ext4_has_feature_extents(sb
)) {
148 ext4_set_inode_flag(inode_bl
, EXT4_INODE_EXTENTS
);
149 ext4_ext_tree_init(handle
, inode_bl
);
151 memset(ei_bl
->i_data
, 0, sizeof(ei_bl
->i_data
));
154 swap_inode_data(inode
, inode_bl
);
156 inode
->i_ctime
= inode_bl
->i_ctime
= current_time(inode
);
158 spin_lock(&sbi
->s_next_gen_lock
);
159 inode
->i_generation
= sbi
->s_next_generation
++;
160 inode_bl
->i_generation
= sbi
->s_next_generation
++;
161 spin_unlock(&sbi
->s_next_gen_lock
);
163 ext4_discard_preallocations(inode
);
165 err
= ext4_mark_inode_dirty(handle
, inode
);
167 ext4_warning(inode
->i_sb
,
168 "couldn't mark inode #%lu dirty (err %d)",
170 /* Revert all changes: */
171 swap_inode_data(inode
, inode_bl
);
173 err
= ext4_mark_inode_dirty(handle
, inode_bl
);
175 ext4_warning(inode_bl
->i_sb
,
176 "couldn't mark inode #%lu dirty (err %d)",
177 inode_bl
->i_ino
, err
);
178 /* Revert all changes: */
179 swap_inode_data(inode
, inode_bl
);
180 ext4_mark_inode_dirty(handle
, inode
);
183 ext4_journal_stop(handle
);
184 ext4_double_up_write_data_sem(inode
, inode_bl
);
187 ext4_inode_resume_unlocked_dio(inode
);
188 ext4_inode_resume_unlocked_dio(inode_bl
);
189 unlock_two_nondirectories(inode
, inode_bl
);
194 #ifdef CONFIG_EXT4_FS_ENCRYPTION
195 static int uuid_is_zero(__u8 u
[16])
199 for (i
= 0; i
< 16; i
++)
206 static int ext4_ioctl_setflags(struct inode
*inode
,
209 struct ext4_inode_info
*ei
= EXT4_I(inode
);
210 handle_t
*handle
= NULL
;
211 int err
= -EPERM
, migrate
= 0;
212 struct ext4_iloc iloc
;
213 unsigned int oldflags
, mask
, i
;
216 /* Is it quota file? Do not allow user to mess with it */
217 if (IS_NOQUOTA(inode
))
220 oldflags
= ei
->i_flags
;
222 /* The JOURNAL_DATA flag is modifiable only by root */
223 jflag
= flags
& EXT4_JOURNAL_DATA_FL
;
226 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
227 * the relevant capability.
229 * This test looks nicer. Thanks to Pauline Middelink
231 if ((flags
^ oldflags
) & (EXT4_APPEND_FL
| EXT4_IMMUTABLE_FL
)) {
232 if (!capable(CAP_LINUX_IMMUTABLE
))
237 * The JOURNAL_DATA flag can only be changed by
238 * the relevant capability.
240 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
)) {
241 if (!ns_capable(inode
->i_sb
->s_user_ns
, CAP_SYS_RESOURCE
))
244 if ((flags
^ oldflags
) & EXT4_EXTENTS_FL
)
247 if (flags
& EXT4_EOFBLOCKS_FL
) {
248 /* we don't support adding EOFBLOCKS flag */
249 if (!(oldflags
& EXT4_EOFBLOCKS_FL
)) {
253 } else if (oldflags
& EXT4_EOFBLOCKS_FL
) {
254 err
= ext4_truncate(inode
);
259 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
260 if (IS_ERR(handle
)) {
261 err
= PTR_ERR(handle
);
265 ext4_handle_sync(handle
);
266 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
270 for (i
= 0, mask
= 1; i
< 32; i
++, mask
<<= 1) {
271 if (!(mask
& EXT4_FL_USER_MODIFIABLE
))
273 /* These flags get special treatment later */
274 if (mask
== EXT4_JOURNAL_DATA_FL
|| mask
== EXT4_EXTENTS_FL
)
277 ext4_set_inode_flag(inode
, i
);
279 ext4_clear_inode_flag(inode
, i
);
282 ext4_set_inode_flags(inode
);
283 inode
->i_ctime
= current_time(inode
);
285 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
287 ext4_journal_stop(handle
);
291 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
))
292 err
= ext4_change_inode_journal_flag(inode
, jflag
);
296 if (flags
& EXT4_EXTENTS_FL
)
297 err
= ext4_ext_migrate(inode
);
299 err
= ext4_ind_migrate(inode
);
307 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
309 struct inode
*inode
= file_inode(filp
);
310 struct super_block
*sb
= inode
->i_sb
;
311 struct ext4_inode_info
*ei
= EXT4_I(inode
);
315 struct ext4_iloc iloc
;
316 struct ext4_inode
*raw_inode
;
317 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
319 if (!ext4_has_feature_project(sb
)) {
320 if (projid
!= EXT4_DEF_PROJID
)
326 if (EXT4_INODE_SIZE(sb
) <= EXT4_GOOD_OLD_INODE_SIZE
)
329 kprojid
= make_kprojid(sb
->s_user_ns
, (projid_t
)projid
);
331 if (!projid_valid(kprojid
))
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 (IS_NOQUOTA(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
)) {
358 dquot_initialize(inode
);
360 handle
= ext4_journal_start(inode
, EXT4_HT_QUOTA
,
361 EXT4_QUOTA_INIT_BLOCKS(sb
) +
362 EXT4_QUOTA_DEL_BLOCKS(sb
) + 3);
363 if (IS_ERR(handle
)) {
364 err
= PTR_ERR(handle
);
368 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
372 transfer_to
[PRJQUOTA
] = dqget(sb
, make_kqid_projid(kprojid
));
373 if (!IS_ERR(transfer_to
[PRJQUOTA
])) {
374 err
= __dquot_transfer(inode
, transfer_to
);
375 dqput(transfer_to
[PRJQUOTA
]);
380 EXT4_I(inode
)->i_projid
= kprojid
;
381 inode
->i_ctime
= current_time(inode
);
383 rc
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
387 ext4_journal_stop(handle
);
390 mnt_drop_write_file(filp
);
394 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
396 if (projid
!= EXT4_DEF_PROJID
)
402 /* Transfer internal flags to xflags */
403 static inline __u32
ext4_iflags_to_xflags(unsigned long iflags
)
407 if (iflags
& EXT4_SYNC_FL
)
408 xflags
|= FS_XFLAG_SYNC
;
409 if (iflags
& EXT4_IMMUTABLE_FL
)
410 xflags
|= FS_XFLAG_IMMUTABLE
;
411 if (iflags
& EXT4_APPEND_FL
)
412 xflags
|= FS_XFLAG_APPEND
;
413 if (iflags
& EXT4_NODUMP_FL
)
414 xflags
|= FS_XFLAG_NODUMP
;
415 if (iflags
& EXT4_NOATIME_FL
)
416 xflags
|= FS_XFLAG_NOATIME
;
417 if (iflags
& EXT4_PROJINHERIT_FL
)
418 xflags
|= FS_XFLAG_PROJINHERIT
;
422 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
423 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
424 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
426 /* Transfer xflags flags to internal */
427 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags
)
429 unsigned long iflags
= 0;
431 if (xflags
& FS_XFLAG_SYNC
)
432 iflags
|= EXT4_SYNC_FL
;
433 if (xflags
& FS_XFLAG_IMMUTABLE
)
434 iflags
|= EXT4_IMMUTABLE_FL
;
435 if (xflags
& FS_XFLAG_APPEND
)
436 iflags
|= EXT4_APPEND_FL
;
437 if (xflags
& FS_XFLAG_NODUMP
)
438 iflags
|= EXT4_NODUMP_FL
;
439 if (xflags
& FS_XFLAG_NOATIME
)
440 iflags
|= EXT4_NOATIME_FL
;
441 if (xflags
& FS_XFLAG_PROJINHERIT
)
442 iflags
|= EXT4_PROJINHERIT_FL
;
447 long ext4_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
449 struct inode
*inode
= file_inode(filp
);
450 struct super_block
*sb
= inode
->i_sb
;
451 struct ext4_inode_info
*ei
= EXT4_I(inode
);
454 ext4_debug("cmd = %u, arg = %lu\n", cmd
, arg
);
457 case EXT4_IOC_GETFLAGS
:
458 ext4_get_inode_flags(ei
);
459 flags
= ei
->i_flags
& EXT4_FL_USER_VISIBLE
;
460 return put_user(flags
, (int __user
*) arg
);
461 case EXT4_IOC_SETFLAGS
: {
464 if (!inode_owner_or_capable(inode
))
467 if (get_user(flags
, (int __user
*) arg
))
470 if (flags
& ~EXT4_FL_USER_VISIBLE
)
473 * chattr(1) grabs flags via GETFLAGS, modifies the result and
474 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
475 * more restrictive than just silently masking off visible but
476 * not settable flags as we always did.
478 flags
&= EXT4_FL_USER_MODIFIABLE
;
479 if (ext4_mask_flags(inode
->i_mode
, flags
) != flags
)
482 err
= mnt_want_write_file(filp
);
487 err
= ext4_ioctl_setflags(inode
, flags
);
489 mnt_drop_write_file(filp
);
492 case EXT4_IOC_GETVERSION
:
493 case EXT4_IOC_GETVERSION_OLD
:
494 return put_user(inode
->i_generation
, (int __user
*) arg
);
495 case EXT4_IOC_SETVERSION
:
496 case EXT4_IOC_SETVERSION_OLD
: {
498 struct ext4_iloc iloc
;
502 if (!inode_owner_or_capable(inode
))
505 if (ext4_has_metadata_csum(inode
->i_sb
)) {
506 ext4_warning(sb
, "Setting inode version is not "
507 "supported with metadata_csum enabled.");
511 err
= mnt_want_write_file(filp
);
514 if (get_user(generation
, (int __user
*) arg
)) {
520 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
521 if (IS_ERR(handle
)) {
522 err
= PTR_ERR(handle
);
525 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
527 inode
->i_ctime
= current_time(inode
);
528 inode
->i_generation
= generation
;
529 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
531 ext4_journal_stop(handle
);
536 mnt_drop_write_file(filp
);
539 case EXT4_IOC_GROUP_EXTEND
: {
540 ext4_fsblk_t n_blocks_count
;
543 err
= ext4_resize_begin(sb
);
547 if (get_user(n_blocks_count
, (__u32 __user
*)arg
)) {
549 goto group_extend_out
;
552 if (ext4_has_feature_bigalloc(sb
)) {
553 ext4_msg(sb
, KERN_ERR
,
554 "Online resizing not supported with bigalloc");
556 goto group_extend_out
;
559 err
= mnt_want_write_file(filp
);
561 goto group_extend_out
;
563 err
= ext4_group_extend(sb
, EXT4_SB(sb
)->s_es
, n_blocks_count
);
564 if (EXT4_SB(sb
)->s_journal
) {
565 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
566 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
567 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
571 mnt_drop_write_file(filp
);
577 case EXT4_IOC_MOVE_EXT
: {
578 struct move_extent me
;
582 if (!(filp
->f_mode
& FMODE_READ
) ||
583 !(filp
->f_mode
& FMODE_WRITE
))
586 if (copy_from_user(&me
,
587 (struct move_extent __user
*)arg
, sizeof(me
)))
591 donor
= fdget(me
.donor_fd
);
595 if (!(donor
.file
->f_mode
& FMODE_WRITE
)) {
600 if (ext4_has_feature_bigalloc(sb
)) {
601 ext4_msg(sb
, KERN_ERR
,
602 "Online defrag not supported with bigalloc");
605 } else if (IS_DAX(inode
)) {
606 ext4_msg(sb
, KERN_ERR
,
607 "Online defrag not supported with DAX");
612 err
= mnt_want_write_file(filp
);
616 err
= ext4_move_extents(filp
, donor
.file
, me
.orig_start
,
617 me
.donor_start
, me
.len
, &me
.moved_len
);
618 mnt_drop_write_file(filp
);
620 if (copy_to_user((struct move_extent __user
*)arg
,
628 case EXT4_IOC_GROUP_ADD
: {
629 struct ext4_new_group_data input
;
632 err
= ext4_resize_begin(sb
);
636 if (copy_from_user(&input
, (struct ext4_new_group_input __user
*)arg
,
642 if (ext4_has_feature_bigalloc(sb
)) {
643 ext4_msg(sb
, KERN_ERR
,
644 "Online resizing not supported with bigalloc");
649 err
= mnt_want_write_file(filp
);
653 err
= ext4_group_add(sb
, &input
);
654 if (EXT4_SB(sb
)->s_journal
) {
655 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
656 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
657 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
661 mnt_drop_write_file(filp
);
662 if (!err
&& ext4_has_group_desc_csum(sb
) &&
663 test_opt(sb
, INIT_INODE_TABLE
))
664 err
= ext4_register_li_request(sb
, input
.group
);
670 case EXT4_IOC_MIGRATE
:
673 if (!inode_owner_or_capable(inode
))
676 err
= mnt_want_write_file(filp
);
680 * inode_mutex prevent write and truncate on the file.
681 * Read still goes through. We take i_data_sem in
682 * ext4_ext_swap_inode_data before we switch the
683 * inode format to prevent read.
686 err
= ext4_ext_migrate(inode
);
687 inode_unlock((inode
));
688 mnt_drop_write_file(filp
);
692 case EXT4_IOC_ALLOC_DA_BLKS
:
695 if (!inode_owner_or_capable(inode
))
698 err
= mnt_want_write_file(filp
);
701 err
= ext4_alloc_da_blocks(inode
);
702 mnt_drop_write_file(filp
);
706 case EXT4_IOC_SWAP_BOOT
:
709 if (!(filp
->f_mode
& FMODE_WRITE
))
711 err
= mnt_want_write_file(filp
);
714 err
= swap_inode_boot_loader(sb
, inode
);
715 mnt_drop_write_file(filp
);
719 case EXT4_IOC_RESIZE_FS
: {
720 ext4_fsblk_t n_blocks_count
;
721 int err
= 0, err2
= 0;
722 ext4_group_t o_group
= EXT4_SB(sb
)->s_groups_count
;
724 if (ext4_has_feature_bigalloc(sb
)) {
725 ext4_msg(sb
, KERN_ERR
,
726 "Online resizing not (yet) supported with bigalloc");
730 if (copy_from_user(&n_blocks_count
, (__u64 __user
*)arg
,
735 err
= ext4_resize_begin(sb
);
739 err
= mnt_want_write_file(filp
);
743 err
= ext4_resize_fs(sb
, n_blocks_count
);
744 if (EXT4_SB(sb
)->s_journal
) {
745 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
746 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
747 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
751 mnt_drop_write_file(filp
);
752 if (!err
&& (o_group
> EXT4_SB(sb
)->s_groups_count
) &&
753 ext4_has_group_desc_csum(sb
) &&
754 test_opt(sb
, INIT_INODE_TABLE
))
755 err
= ext4_register_li_request(sb
, o_group
);
764 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
765 struct fstrim_range range
;
768 if (!ns_capable(sb
->s_user_ns
, CAP_SYS_ADMIN
))
771 if (!blk_queue_discard(q
))
774 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
778 range
.minlen
= max((unsigned int)range
.minlen
,
779 q
->limits
.discard_granularity
);
780 ret
= ext4_trim_fs(sb
, &range
);
784 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
790 case EXT4_IOC_PRECACHE_EXTENTS
:
791 return ext4_ext_precache(inode
);
793 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
794 if (!ext4_has_feature_encrypt(sb
))
796 return fscrypt_ioctl_set_policy(filp
, (const void __user
*)arg
);
798 case EXT4_IOC_GET_ENCRYPTION_PWSALT
: {
799 #ifdef CONFIG_EXT4_FS_ENCRYPTION
801 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
804 if (!ext4_has_feature_encrypt(sb
))
806 if (uuid_is_zero(sbi
->s_es
->s_encrypt_pw_salt
)) {
807 err
= mnt_want_write_file(filp
);
810 handle
= ext4_journal_start_sb(sb
, EXT4_HT_MISC
, 1);
811 if (IS_ERR(handle
)) {
812 err
= PTR_ERR(handle
);
813 goto pwsalt_err_exit
;
815 err
= ext4_journal_get_write_access(handle
, sbi
->s_sbh
);
817 goto pwsalt_err_journal
;
818 generate_random_uuid(sbi
->s_es
->s_encrypt_pw_salt
);
819 err
= ext4_handle_dirty_metadata(handle
, NULL
,
822 err2
= ext4_journal_stop(handle
);
826 mnt_drop_write_file(filp
);
830 if (copy_to_user((void __user
*) arg
,
831 sbi
->s_es
->s_encrypt_pw_salt
, 16))
838 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
839 return fscrypt_ioctl_get_policy(filp
, (void __user
*)arg
);
841 case EXT4_IOC_FSGETXATTR
:
845 memset(&fa
, 0, sizeof(struct fsxattr
));
846 ext4_get_inode_flags(ei
);
847 fa
.fsx_xflags
= ext4_iflags_to_xflags(ei
->i_flags
& EXT4_FL_USER_VISIBLE
);
849 if (ext4_has_feature_project(inode
->i_sb
)) {
850 fa
.fsx_projid
= (__u32
)from_kprojid_munged(sb
->s_user_ns
,
851 EXT4_I(inode
)->i_projid
);
854 if (copy_to_user((struct fsxattr __user
*)arg
,
859 case EXT4_IOC_FSSETXATTR
:
864 if (copy_from_user(&fa
, (struct fsxattr __user
*)arg
,
868 /* Make sure caller has proper permission */
869 if (!inode_owner_or_capable(inode
))
872 if (fa
.fsx_xflags
& ~EXT4_SUPPORTED_FS_XFLAGS
)
875 flags
= ext4_xflags_to_iflags(fa
.fsx_xflags
);
876 if (ext4_mask_flags(inode
->i_mode
, flags
) != flags
)
879 err
= mnt_want_write_file(filp
);
884 flags
= (ei
->i_flags
& ~EXT4_FL_XFLAG_VISIBLE
) |
885 (flags
& EXT4_FL_XFLAG_VISIBLE
);
886 err
= ext4_ioctl_setflags(inode
, flags
);
888 mnt_drop_write_file(filp
);
892 err
= ext4_ioctl_setproject(filp
, fa
.fsx_projid
);
904 long ext4_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
906 /* These are just misnamed, they actually get/put from/to user an int */
908 case EXT4_IOC32_GETFLAGS
:
909 cmd
= EXT4_IOC_GETFLAGS
;
911 case EXT4_IOC32_SETFLAGS
:
912 cmd
= EXT4_IOC_SETFLAGS
;
914 case EXT4_IOC32_GETVERSION
:
915 cmd
= EXT4_IOC_GETVERSION
;
917 case EXT4_IOC32_SETVERSION
:
918 cmd
= EXT4_IOC_SETVERSION
;
920 case EXT4_IOC32_GROUP_EXTEND
:
921 cmd
= EXT4_IOC_GROUP_EXTEND
;
923 case EXT4_IOC32_GETVERSION_OLD
:
924 cmd
= EXT4_IOC_GETVERSION_OLD
;
926 case EXT4_IOC32_SETVERSION_OLD
:
927 cmd
= EXT4_IOC_SETVERSION_OLD
;
929 case EXT4_IOC32_GETRSVSZ
:
930 cmd
= EXT4_IOC_GETRSVSZ
;
932 case EXT4_IOC32_SETRSVSZ
:
933 cmd
= EXT4_IOC_SETRSVSZ
;
935 case EXT4_IOC32_GROUP_ADD
: {
936 struct compat_ext4_new_group_input __user
*uinput
;
937 struct ext4_new_group_input input
;
941 uinput
= compat_ptr(arg
);
942 err
= get_user(input
.group
, &uinput
->group
);
943 err
|= get_user(input
.block_bitmap
, &uinput
->block_bitmap
);
944 err
|= get_user(input
.inode_bitmap
, &uinput
->inode_bitmap
);
945 err
|= get_user(input
.inode_table
, &uinput
->inode_table
);
946 err
|= get_user(input
.blocks_count
, &uinput
->blocks_count
);
947 err
|= get_user(input
.reserved_blocks
,
948 &uinput
->reserved_blocks
);
953 err
= ext4_ioctl(file
, EXT4_IOC_GROUP_ADD
,
954 (unsigned long) &input
);
958 case EXT4_IOC_MOVE_EXT
:
959 case EXT4_IOC_RESIZE_FS
:
960 case EXT4_IOC_PRECACHE_EXTENTS
:
961 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
962 case EXT4_IOC_GET_ENCRYPTION_PWSALT
:
963 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
968 return ext4_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));