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/random.h>
17 #include <linux/quotaops.h>
18 #include <asm/uaccess.h>
19 #include "ext4_jbd2.h"
22 #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
25 * Swap memory between @a and @b for @len bytes.
27 * @a: pointer to first memory area
28 * @b: pointer to second memory area
29 * @len: number of bytes to swap
32 static void memswap(void *a
, void *b
, size_t len
)
34 unsigned char *ap
, *bp
;
36 ap
= (unsigned char *)a
;
37 bp
= (unsigned char *)b
;
46 * Swap i_data and associated attributes between @inode1 and @inode2.
47 * This function is used for the primary swap between inode1 and inode2
48 * and also to revert this primary swap in case of errors.
50 * Therefore you have to make sure, that calling this method twice
51 * will revert all changes.
53 * @inode1: pointer to first inode
54 * @inode2: pointer to second inode
56 static void swap_inode_data(struct inode
*inode1
, struct inode
*inode2
)
59 struct ext4_inode_info
*ei1
;
60 struct ext4_inode_info
*ei2
;
65 memswap(&inode1
->i_flags
, &inode2
->i_flags
, sizeof(inode1
->i_flags
));
66 memswap(&inode1
->i_version
, &inode2
->i_version
,
67 sizeof(inode1
->i_version
));
68 memswap(&inode1
->i_blocks
, &inode2
->i_blocks
,
69 sizeof(inode1
->i_blocks
));
70 memswap(&inode1
->i_bytes
, &inode2
->i_bytes
, sizeof(inode1
->i_bytes
));
71 memswap(&inode1
->i_atime
, &inode2
->i_atime
, sizeof(inode1
->i_atime
));
72 memswap(&inode1
->i_mtime
, &inode2
->i_mtime
, sizeof(inode1
->i_mtime
));
74 memswap(ei1
->i_data
, ei2
->i_data
, sizeof(ei1
->i_data
));
75 memswap(&ei1
->i_flags
, &ei2
->i_flags
, sizeof(ei1
->i_flags
));
76 memswap(&ei1
->i_disksize
, &ei2
->i_disksize
, sizeof(ei1
->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
= ext4_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 static int uuid_is_zero(__u8 u
[16])
200 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 (!capable(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 ext4_truncate(inode
);
256 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
257 if (IS_ERR(handle
)) {
258 err
= PTR_ERR(handle
);
262 ext4_handle_sync(handle
);
263 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
267 for (i
= 0, mask
= 1; i
< 32; i
++, mask
<<= 1) {
268 if (!(mask
& EXT4_FL_USER_MODIFIABLE
))
271 ext4_set_inode_flag(inode
, i
);
273 ext4_clear_inode_flag(inode
, i
);
276 ext4_set_inode_flags(inode
);
277 inode
->i_ctime
= ext4_current_time(inode
);
279 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
281 ext4_journal_stop(handle
);
285 if ((jflag
^ oldflags
) & (EXT4_JOURNAL_DATA_FL
))
286 err
= ext4_change_inode_journal_flag(inode
, jflag
);
290 if (flags
& EXT4_EXTENTS_FL
)
291 err
= ext4_ext_migrate(inode
);
293 err
= ext4_ind_migrate(inode
);
301 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
303 struct inode
*inode
= file_inode(filp
);
304 struct super_block
*sb
= inode
->i_sb
;
305 struct ext4_inode_info
*ei
= EXT4_I(inode
);
309 struct ext4_iloc iloc
;
310 struct ext4_inode
*raw_inode
;
312 if (!EXT4_HAS_RO_COMPAT_FEATURE(sb
,
313 EXT4_FEATURE_RO_COMPAT_PROJECT
)) {
314 if (projid
!= EXT4_DEF_PROJID
)
320 if (EXT4_INODE_SIZE(sb
) <= EXT4_GOOD_OLD_INODE_SIZE
)
323 kprojid
= make_kprojid(&init_user_ns
, (projid_t
)projid
);
325 if (projid_eq(kprojid
, EXT4_I(inode
)->i_projid
))
328 err
= mnt_want_write_file(filp
);
334 /* Is it quota file? Do not allow user to mess with it */
335 if (IS_NOQUOTA(inode
))
338 err
= ext4_get_inode_loc(inode
, &iloc
);
342 raw_inode
= ext4_raw_inode(&iloc
);
343 if (!EXT4_FITS_IN_INODE(raw_inode
, ei
, i_projid
)) {
350 dquot_initialize(inode
);
352 handle
= ext4_journal_start(inode
, EXT4_HT_QUOTA
,
353 EXT4_QUOTA_INIT_BLOCKS(sb
) +
354 EXT4_QUOTA_DEL_BLOCKS(sb
) + 3);
355 if (IS_ERR(handle
)) {
356 err
= PTR_ERR(handle
);
360 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
364 if (sb_has_quota_limits_enabled(sb
, PRJQUOTA
)) {
365 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
367 transfer_to
[PRJQUOTA
] = dqget(sb
, make_kqid_projid(kprojid
));
368 if (transfer_to
[PRJQUOTA
]) {
369 err
= __dquot_transfer(inode
, transfer_to
);
370 dqput(transfer_to
[PRJQUOTA
]);
375 EXT4_I(inode
)->i_projid
= kprojid
;
376 inode
->i_ctime
= ext4_current_time(inode
);
378 rc
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
382 ext4_journal_stop(handle
);
385 mnt_drop_write_file(filp
);
389 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
391 if (projid
!= EXT4_DEF_PROJID
)
397 /* Transfer internal flags to xflags */
398 static inline __u32
ext4_iflags_to_xflags(unsigned long iflags
)
402 if (iflags
& EXT4_SYNC_FL
)
403 xflags
|= FS_XFLAG_SYNC
;
404 if (iflags
& EXT4_IMMUTABLE_FL
)
405 xflags
|= FS_XFLAG_IMMUTABLE
;
406 if (iflags
& EXT4_APPEND_FL
)
407 xflags
|= FS_XFLAG_APPEND
;
408 if (iflags
& EXT4_NODUMP_FL
)
409 xflags
|= FS_XFLAG_NODUMP
;
410 if (iflags
& EXT4_NOATIME_FL
)
411 xflags
|= FS_XFLAG_NOATIME
;
412 if (iflags
& EXT4_PROJINHERIT_FL
)
413 xflags
|= FS_XFLAG_PROJINHERIT
;
417 /* Transfer xflags flags to internal */
418 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags
)
420 unsigned long iflags
= 0;
422 if (xflags
& FS_XFLAG_SYNC
)
423 iflags
|= EXT4_SYNC_FL
;
424 if (xflags
& FS_XFLAG_IMMUTABLE
)
425 iflags
|= EXT4_IMMUTABLE_FL
;
426 if (xflags
& FS_XFLAG_APPEND
)
427 iflags
|= EXT4_APPEND_FL
;
428 if (xflags
& FS_XFLAG_NODUMP
)
429 iflags
|= EXT4_NODUMP_FL
;
430 if (xflags
& FS_XFLAG_NOATIME
)
431 iflags
|= EXT4_NOATIME_FL
;
432 if (xflags
& FS_XFLAG_PROJINHERIT
)
433 iflags
|= EXT4_PROJINHERIT_FL
;
438 long ext4_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
440 struct inode
*inode
= file_inode(filp
);
441 struct super_block
*sb
= inode
->i_sb
;
442 struct ext4_inode_info
*ei
= EXT4_I(inode
);
445 ext4_debug("cmd = %u, arg = %lu\n", cmd
, arg
);
448 case EXT4_IOC_GETFLAGS
:
449 ext4_get_inode_flags(ei
);
450 flags
= ei
->i_flags
& EXT4_FL_USER_VISIBLE
;
451 return put_user(flags
, (int __user
*) arg
);
452 case EXT4_IOC_SETFLAGS
: {
455 if (!inode_owner_or_capable(inode
))
458 if (get_user(flags
, (int __user
*) arg
))
461 err
= mnt_want_write_file(filp
);
465 flags
= ext4_mask_flags(inode
->i_mode
, flags
);
468 err
= ext4_ioctl_setflags(inode
, flags
);
470 mnt_drop_write_file(filp
);
473 case EXT4_IOC_GETVERSION
:
474 case EXT4_IOC_GETVERSION_OLD
:
475 return put_user(inode
->i_generation
, (int __user
*) arg
);
476 case EXT4_IOC_SETVERSION
:
477 case EXT4_IOC_SETVERSION_OLD
: {
479 struct ext4_iloc iloc
;
483 if (!inode_owner_or_capable(inode
))
486 if (ext4_has_metadata_csum(inode
->i_sb
)) {
487 ext4_warning(sb
, "Setting inode version is not "
488 "supported with metadata_csum enabled.");
492 err
= mnt_want_write_file(filp
);
495 if (get_user(generation
, (int __user
*) arg
)) {
501 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
502 if (IS_ERR(handle
)) {
503 err
= PTR_ERR(handle
);
506 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
508 inode
->i_ctime
= ext4_current_time(inode
);
509 inode
->i_generation
= generation
;
510 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
512 ext4_journal_stop(handle
);
517 mnt_drop_write_file(filp
);
520 case EXT4_IOC_GROUP_EXTEND
: {
521 ext4_fsblk_t n_blocks_count
;
524 err
= ext4_resize_begin(sb
);
528 if (get_user(n_blocks_count
, (__u32 __user
*)arg
)) {
530 goto group_extend_out
;
533 if (ext4_has_feature_bigalloc(sb
)) {
534 ext4_msg(sb
, KERN_ERR
,
535 "Online resizing not supported with bigalloc");
537 goto group_extend_out
;
540 err
= mnt_want_write_file(filp
);
542 goto group_extend_out
;
544 err
= ext4_group_extend(sb
, EXT4_SB(sb
)->s_es
, n_blocks_count
);
545 if (EXT4_SB(sb
)->s_journal
) {
546 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
547 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
548 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
552 mnt_drop_write_file(filp
);
558 case EXT4_IOC_MOVE_EXT
: {
559 struct move_extent me
;
563 if (!(filp
->f_mode
& FMODE_READ
) ||
564 !(filp
->f_mode
& FMODE_WRITE
))
567 if (copy_from_user(&me
,
568 (struct move_extent __user
*)arg
, sizeof(me
)))
572 donor
= fdget(me
.donor_fd
);
576 if (!(donor
.file
->f_mode
& FMODE_WRITE
)) {
581 if (ext4_has_feature_bigalloc(sb
)) {
582 ext4_msg(sb
, KERN_ERR
,
583 "Online defrag not supported with bigalloc");
588 err
= mnt_want_write_file(filp
);
592 err
= ext4_move_extents(filp
, donor
.file
, me
.orig_start
,
593 me
.donor_start
, me
.len
, &me
.moved_len
);
594 mnt_drop_write_file(filp
);
596 if (copy_to_user((struct move_extent __user
*)arg
,
604 case EXT4_IOC_GROUP_ADD
: {
605 struct ext4_new_group_data input
;
608 err
= ext4_resize_begin(sb
);
612 if (copy_from_user(&input
, (struct ext4_new_group_input __user
*)arg
,
618 if (ext4_has_feature_bigalloc(sb
)) {
619 ext4_msg(sb
, KERN_ERR
,
620 "Online resizing not supported with bigalloc");
625 err
= mnt_want_write_file(filp
);
629 err
= ext4_group_add(sb
, &input
);
630 if (EXT4_SB(sb
)->s_journal
) {
631 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
632 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
633 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
637 mnt_drop_write_file(filp
);
638 if (!err
&& ext4_has_group_desc_csum(sb
) &&
639 test_opt(sb
, INIT_INODE_TABLE
))
640 err
= ext4_register_li_request(sb
, input
.group
);
646 case EXT4_IOC_MIGRATE
:
649 if (!inode_owner_or_capable(inode
))
652 err
= mnt_want_write_file(filp
);
656 * inode_mutex prevent write and truncate on the file.
657 * Read still goes through. We take i_data_sem in
658 * ext4_ext_swap_inode_data before we switch the
659 * inode format to prevent read.
662 err
= ext4_ext_migrate(inode
);
663 inode_unlock((inode
));
664 mnt_drop_write_file(filp
);
668 case EXT4_IOC_ALLOC_DA_BLKS
:
671 if (!inode_owner_or_capable(inode
))
674 err
= mnt_want_write_file(filp
);
677 err
= ext4_alloc_da_blocks(inode
);
678 mnt_drop_write_file(filp
);
682 case EXT4_IOC_SWAP_BOOT
:
685 if (!(filp
->f_mode
& FMODE_WRITE
))
687 err
= mnt_want_write_file(filp
);
690 err
= swap_inode_boot_loader(sb
, inode
);
691 mnt_drop_write_file(filp
);
695 case EXT4_IOC_RESIZE_FS
: {
696 ext4_fsblk_t n_blocks_count
;
697 int err
= 0, err2
= 0;
698 ext4_group_t o_group
= EXT4_SB(sb
)->s_groups_count
;
700 if (ext4_has_feature_bigalloc(sb
)) {
701 ext4_msg(sb
, KERN_ERR
,
702 "Online resizing not (yet) supported with bigalloc");
706 if (copy_from_user(&n_blocks_count
, (__u64 __user
*)arg
,
711 err
= ext4_resize_begin(sb
);
715 err
= mnt_want_write_file(filp
);
719 err
= ext4_resize_fs(sb
, n_blocks_count
);
720 if (EXT4_SB(sb
)->s_journal
) {
721 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
722 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
723 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
727 mnt_drop_write_file(filp
);
728 if (!err
&& (o_group
> EXT4_SB(sb
)->s_groups_count
) &&
729 ext4_has_group_desc_csum(sb
) &&
730 test_opt(sb
, INIT_INODE_TABLE
))
731 err
= ext4_register_li_request(sb
, o_group
);
740 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
741 struct fstrim_range range
;
744 if (!capable(CAP_SYS_ADMIN
))
747 if (!blk_queue_discard(q
))
750 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
754 range
.minlen
= max((unsigned int)range
.minlen
,
755 q
->limits
.discard_granularity
);
756 ret
= ext4_trim_fs(sb
, &range
);
760 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
766 case EXT4_IOC_PRECACHE_EXTENTS
:
767 return ext4_ext_precache(inode
);
768 case EXT4_IOC_SET_ENCRYPTION_POLICY
: {
769 #ifdef CONFIG_EXT4_FS_ENCRYPTION
770 struct ext4_encryption_policy policy
;
773 if (copy_from_user(&policy
,
774 (struct ext4_encryption_policy __user
*)arg
,
777 goto encryption_policy_out
;
780 err
= ext4_process_policy(&policy
, inode
);
781 encryption_policy_out
:
787 case EXT4_IOC_GET_ENCRYPTION_PWSALT
: {
789 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
792 if (!ext4_sb_has_crypto(sb
))
794 if (uuid_is_zero(sbi
->s_es
->s_encrypt_pw_salt
)) {
795 err
= mnt_want_write_file(filp
);
798 handle
= ext4_journal_start_sb(sb
, EXT4_HT_MISC
, 1);
799 if (IS_ERR(handle
)) {
800 err
= PTR_ERR(handle
);
801 goto pwsalt_err_exit
;
803 err
= ext4_journal_get_write_access(handle
, sbi
->s_sbh
);
805 goto pwsalt_err_journal
;
806 generate_random_uuid(sbi
->s_es
->s_encrypt_pw_salt
);
807 err
= ext4_handle_dirty_metadata(handle
, NULL
,
810 err2
= ext4_journal_stop(handle
);
814 mnt_drop_write_file(filp
);
818 if (copy_to_user((void __user
*) arg
,
819 sbi
->s_es
->s_encrypt_pw_salt
, 16))
823 case EXT4_IOC_GET_ENCRYPTION_POLICY
: {
824 #ifdef CONFIG_EXT4_FS_ENCRYPTION
825 struct ext4_encryption_policy policy
;
828 if (!ext4_encrypted_inode(inode
))
830 err
= ext4_get_policy(inode
, &policy
);
833 if (copy_to_user((void __user
*)arg
, &policy
, sizeof(policy
)))
840 case EXT4_IOC_FSGETXATTR
:
844 memset(&fa
, 0, sizeof(struct fsxattr
));
845 ext4_get_inode_flags(ei
);
846 fa
.fsx_xflags
= ext4_iflags_to_xflags(ei
->i_flags
& EXT4_FL_USER_VISIBLE
);
848 if (EXT4_HAS_RO_COMPAT_FEATURE(inode
->i_sb
,
849 EXT4_FEATURE_RO_COMPAT_PROJECT
)) {
850 fa
.fsx_projid
= (__u32
)from_kprojid(&init_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 err
= mnt_want_write_file(filp
);
876 flags
= ext4_xflags_to_iflags(fa
.fsx_xflags
);
877 flags
= ext4_mask_flags(inode
->i_mode
, flags
);
880 flags
= (ei
->i_flags
& ~EXT4_FL_XFLAG_VISIBLE
) |
881 (flags
& EXT4_FL_XFLAG_VISIBLE
);
882 err
= ext4_ioctl_setflags(inode
, flags
);
884 mnt_drop_write_file(filp
);
888 err
= ext4_ioctl_setproject(filp
, fa
.fsx_projid
);
900 long ext4_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
902 /* These are just misnamed, they actually get/put from/to user an int */
904 case EXT4_IOC32_GETFLAGS
:
905 cmd
= EXT4_IOC_GETFLAGS
;
907 case EXT4_IOC32_SETFLAGS
:
908 cmd
= EXT4_IOC_SETFLAGS
;
910 case EXT4_IOC32_GETVERSION
:
911 cmd
= EXT4_IOC_GETVERSION
;
913 case EXT4_IOC32_SETVERSION
:
914 cmd
= EXT4_IOC_SETVERSION
;
916 case EXT4_IOC32_GROUP_EXTEND
:
917 cmd
= EXT4_IOC_GROUP_EXTEND
;
919 case EXT4_IOC32_GETVERSION_OLD
:
920 cmd
= EXT4_IOC_GETVERSION_OLD
;
922 case EXT4_IOC32_SETVERSION_OLD
:
923 cmd
= EXT4_IOC_SETVERSION_OLD
;
925 case EXT4_IOC32_GETRSVSZ
:
926 cmd
= EXT4_IOC_GETRSVSZ
;
928 case EXT4_IOC32_SETRSVSZ
:
929 cmd
= EXT4_IOC_SETRSVSZ
;
931 case EXT4_IOC32_GROUP_ADD
: {
932 struct compat_ext4_new_group_input __user
*uinput
;
933 struct ext4_new_group_input input
;
937 uinput
= compat_ptr(arg
);
938 err
= get_user(input
.group
, &uinput
->group
);
939 err
|= get_user(input
.block_bitmap
, &uinput
->block_bitmap
);
940 err
|= get_user(input
.inode_bitmap
, &uinput
->inode_bitmap
);
941 err
|= get_user(input
.inode_table
, &uinput
->inode_table
);
942 err
|= get_user(input
.blocks_count
, &uinput
->blocks_count
);
943 err
|= get_user(input
.reserved_blocks
,
944 &uinput
->reserved_blocks
);
949 err
= ext4_ioctl(file
, EXT4_IOC_GROUP_ADD
,
950 (unsigned long) &input
);
954 case EXT4_IOC_MOVE_EXT
:
955 case EXT4_IOC_RESIZE_FS
:
956 case EXT4_IOC_PRECACHE_EXTENTS
:
957 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
958 case EXT4_IOC_GET_ENCRYPTION_PWSALT
:
959 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
964 return ext4_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));