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 <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
;
311 struct dquot
*transfer_to
[MAXQUOTAS
] = { };
313 if (!EXT4_HAS_RO_COMPAT_FEATURE(sb
,
314 EXT4_FEATURE_RO_COMPAT_PROJECT
)) {
315 if (projid
!= EXT4_DEF_PROJID
)
321 if (EXT4_INODE_SIZE(sb
) <= EXT4_GOOD_OLD_INODE_SIZE
)
324 kprojid
= make_kprojid(&init_user_ns
, (projid_t
)projid
);
326 if (projid_eq(kprojid
, EXT4_I(inode
)->i_projid
))
329 err
= mnt_want_write_file(filp
);
335 /* Is it quota file? Do not allow user to mess with it */
336 if (IS_NOQUOTA(inode
))
339 err
= ext4_get_inode_loc(inode
, &iloc
);
343 raw_inode
= ext4_raw_inode(&iloc
);
344 if (!EXT4_FITS_IN_INODE(raw_inode
, ei
, i_projid
)) {
351 dquot_initialize(inode
);
353 handle
= ext4_journal_start(inode
, EXT4_HT_QUOTA
,
354 EXT4_QUOTA_INIT_BLOCKS(sb
) +
355 EXT4_QUOTA_DEL_BLOCKS(sb
) + 3);
356 if (IS_ERR(handle
)) {
357 err
= PTR_ERR(handle
);
361 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
365 transfer_to
[PRJQUOTA
] = dqget(sb
, make_kqid_projid(kprojid
));
366 if (!IS_ERR(transfer_to
[PRJQUOTA
])) {
367 err
= __dquot_transfer(inode
, transfer_to
);
368 dqput(transfer_to
[PRJQUOTA
]);
373 EXT4_I(inode
)->i_projid
= kprojid
;
374 inode
->i_ctime
= ext4_current_time(inode
);
376 rc
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
380 ext4_journal_stop(handle
);
383 mnt_drop_write_file(filp
);
387 static int ext4_ioctl_setproject(struct file
*filp
, __u32 projid
)
389 if (projid
!= EXT4_DEF_PROJID
)
395 /* Transfer internal flags to xflags */
396 static inline __u32
ext4_iflags_to_xflags(unsigned long iflags
)
400 if (iflags
& EXT4_SYNC_FL
)
401 xflags
|= FS_XFLAG_SYNC
;
402 if (iflags
& EXT4_IMMUTABLE_FL
)
403 xflags
|= FS_XFLAG_IMMUTABLE
;
404 if (iflags
& EXT4_APPEND_FL
)
405 xflags
|= FS_XFLAG_APPEND
;
406 if (iflags
& EXT4_NODUMP_FL
)
407 xflags
|= FS_XFLAG_NODUMP
;
408 if (iflags
& EXT4_NOATIME_FL
)
409 xflags
|= FS_XFLAG_NOATIME
;
410 if (iflags
& EXT4_PROJINHERIT_FL
)
411 xflags
|= FS_XFLAG_PROJINHERIT
;
415 /* Transfer xflags flags to internal */
416 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags
)
418 unsigned long iflags
= 0;
420 if (xflags
& FS_XFLAG_SYNC
)
421 iflags
|= EXT4_SYNC_FL
;
422 if (xflags
& FS_XFLAG_IMMUTABLE
)
423 iflags
|= EXT4_IMMUTABLE_FL
;
424 if (xflags
& FS_XFLAG_APPEND
)
425 iflags
|= EXT4_APPEND_FL
;
426 if (xflags
& FS_XFLAG_NODUMP
)
427 iflags
|= EXT4_NODUMP_FL
;
428 if (xflags
& FS_XFLAG_NOATIME
)
429 iflags
|= EXT4_NOATIME_FL
;
430 if (xflags
& FS_XFLAG_PROJINHERIT
)
431 iflags
|= EXT4_PROJINHERIT_FL
;
436 long ext4_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
438 struct inode
*inode
= file_inode(filp
);
439 struct super_block
*sb
= inode
->i_sb
;
440 struct ext4_inode_info
*ei
= EXT4_I(inode
);
443 ext4_debug("cmd = %u, arg = %lu\n", cmd
, arg
);
446 case EXT4_IOC_GETFLAGS
:
447 ext4_get_inode_flags(ei
);
448 flags
= ei
->i_flags
& EXT4_FL_USER_VISIBLE
;
449 return put_user(flags
, (int __user
*) arg
);
450 case EXT4_IOC_SETFLAGS
: {
453 if (!inode_owner_or_capable(inode
))
456 if (get_user(flags
, (int __user
*) arg
))
459 err
= mnt_want_write_file(filp
);
463 flags
= ext4_mask_flags(inode
->i_mode
, flags
);
466 err
= ext4_ioctl_setflags(inode
, flags
);
468 mnt_drop_write_file(filp
);
471 case EXT4_IOC_GETVERSION
:
472 case EXT4_IOC_GETVERSION_OLD
:
473 return put_user(inode
->i_generation
, (int __user
*) arg
);
474 case EXT4_IOC_SETVERSION
:
475 case EXT4_IOC_SETVERSION_OLD
: {
477 struct ext4_iloc iloc
;
481 if (!inode_owner_or_capable(inode
))
484 if (ext4_has_metadata_csum(inode
->i_sb
)) {
485 ext4_warning(sb
, "Setting inode version is not "
486 "supported with metadata_csum enabled.");
490 err
= mnt_want_write_file(filp
);
493 if (get_user(generation
, (int __user
*) arg
)) {
499 handle
= ext4_journal_start(inode
, EXT4_HT_INODE
, 1);
500 if (IS_ERR(handle
)) {
501 err
= PTR_ERR(handle
);
504 err
= ext4_reserve_inode_write(handle
, inode
, &iloc
);
506 inode
->i_ctime
= ext4_current_time(inode
);
507 inode
->i_generation
= generation
;
508 err
= ext4_mark_iloc_dirty(handle
, inode
, &iloc
);
510 ext4_journal_stop(handle
);
515 mnt_drop_write_file(filp
);
518 case EXT4_IOC_GROUP_EXTEND
: {
519 ext4_fsblk_t n_blocks_count
;
522 err
= ext4_resize_begin(sb
);
526 if (get_user(n_blocks_count
, (__u32 __user
*)arg
)) {
528 goto group_extend_out
;
531 if (ext4_has_feature_bigalloc(sb
)) {
532 ext4_msg(sb
, KERN_ERR
,
533 "Online resizing not supported with bigalloc");
535 goto group_extend_out
;
538 err
= mnt_want_write_file(filp
);
540 goto group_extend_out
;
542 err
= ext4_group_extend(sb
, EXT4_SB(sb
)->s_es
, n_blocks_count
);
543 if (EXT4_SB(sb
)->s_journal
) {
544 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
545 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
546 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
550 mnt_drop_write_file(filp
);
556 case EXT4_IOC_MOVE_EXT
: {
557 struct move_extent me
;
561 if (!(filp
->f_mode
& FMODE_READ
) ||
562 !(filp
->f_mode
& FMODE_WRITE
))
565 if (copy_from_user(&me
,
566 (struct move_extent __user
*)arg
, sizeof(me
)))
570 donor
= fdget(me
.donor_fd
);
574 if (!(donor
.file
->f_mode
& FMODE_WRITE
)) {
579 if (ext4_has_feature_bigalloc(sb
)) {
580 ext4_msg(sb
, KERN_ERR
,
581 "Online defrag not supported with bigalloc");
584 } else if (IS_DAX(inode
)) {
585 ext4_msg(sb
, KERN_ERR
,
586 "Online defrag not supported with DAX");
591 err
= mnt_want_write_file(filp
);
595 err
= ext4_move_extents(filp
, donor
.file
, me
.orig_start
,
596 me
.donor_start
, me
.len
, &me
.moved_len
);
597 mnt_drop_write_file(filp
);
599 if (copy_to_user((struct move_extent __user
*)arg
,
607 case EXT4_IOC_GROUP_ADD
: {
608 struct ext4_new_group_data input
;
611 err
= ext4_resize_begin(sb
);
615 if (copy_from_user(&input
, (struct ext4_new_group_input __user
*)arg
,
621 if (ext4_has_feature_bigalloc(sb
)) {
622 ext4_msg(sb
, KERN_ERR
,
623 "Online resizing not supported with bigalloc");
628 err
= mnt_want_write_file(filp
);
632 err
= ext4_group_add(sb
, &input
);
633 if (EXT4_SB(sb
)->s_journal
) {
634 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
635 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
636 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
640 mnt_drop_write_file(filp
);
641 if (!err
&& ext4_has_group_desc_csum(sb
) &&
642 test_opt(sb
, INIT_INODE_TABLE
))
643 err
= ext4_register_li_request(sb
, input
.group
);
649 case EXT4_IOC_MIGRATE
:
652 if (!inode_owner_or_capable(inode
))
655 err
= mnt_want_write_file(filp
);
659 * inode_mutex prevent write and truncate on the file.
660 * Read still goes through. We take i_data_sem in
661 * ext4_ext_swap_inode_data before we switch the
662 * inode format to prevent read.
665 err
= ext4_ext_migrate(inode
);
666 inode_unlock((inode
));
667 mnt_drop_write_file(filp
);
671 case EXT4_IOC_ALLOC_DA_BLKS
:
674 if (!inode_owner_or_capable(inode
))
677 err
= mnt_want_write_file(filp
);
680 err
= ext4_alloc_da_blocks(inode
);
681 mnt_drop_write_file(filp
);
685 case EXT4_IOC_SWAP_BOOT
:
688 if (!(filp
->f_mode
& FMODE_WRITE
))
690 err
= mnt_want_write_file(filp
);
693 err
= swap_inode_boot_loader(sb
, inode
);
694 mnt_drop_write_file(filp
);
698 case EXT4_IOC_RESIZE_FS
: {
699 ext4_fsblk_t n_blocks_count
;
700 int err
= 0, err2
= 0;
701 ext4_group_t o_group
= EXT4_SB(sb
)->s_groups_count
;
703 if (ext4_has_feature_bigalloc(sb
)) {
704 ext4_msg(sb
, KERN_ERR
,
705 "Online resizing not (yet) supported with bigalloc");
709 if (copy_from_user(&n_blocks_count
, (__u64 __user
*)arg
,
714 err
= ext4_resize_begin(sb
);
718 err
= mnt_want_write_file(filp
);
722 err
= ext4_resize_fs(sb
, n_blocks_count
);
723 if (EXT4_SB(sb
)->s_journal
) {
724 jbd2_journal_lock_updates(EXT4_SB(sb
)->s_journal
);
725 err2
= jbd2_journal_flush(EXT4_SB(sb
)->s_journal
);
726 jbd2_journal_unlock_updates(EXT4_SB(sb
)->s_journal
);
730 mnt_drop_write_file(filp
);
731 if (!err
&& (o_group
> EXT4_SB(sb
)->s_groups_count
) &&
732 ext4_has_group_desc_csum(sb
) &&
733 test_opt(sb
, INIT_INODE_TABLE
))
734 err
= ext4_register_li_request(sb
, o_group
);
743 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
744 struct fstrim_range range
;
747 if (!capable(CAP_SYS_ADMIN
))
750 if (!blk_queue_discard(q
))
753 if (copy_from_user(&range
, (struct fstrim_range __user
*)arg
,
757 range
.minlen
= max((unsigned int)range
.minlen
,
758 q
->limits
.discard_granularity
);
759 ret
= ext4_trim_fs(sb
, &range
);
763 if (copy_to_user((struct fstrim_range __user
*)arg
, &range
,
769 case EXT4_IOC_PRECACHE_EXTENTS
:
770 return ext4_ext_precache(inode
);
771 case EXT4_IOC_SET_ENCRYPTION_POLICY
: {
772 #ifdef CONFIG_EXT4_FS_ENCRYPTION
773 struct fscrypt_policy policy
;
775 if (copy_from_user(&policy
,
776 (struct fscrypt_policy __user
*)arg
,
779 return fscrypt_process_policy(inode
, &policy
);
784 case EXT4_IOC_GET_ENCRYPTION_PWSALT
: {
786 struct ext4_sb_info
*sbi
= EXT4_SB(sb
);
789 if (!ext4_sb_has_crypto(sb
))
791 if (uuid_is_zero(sbi
->s_es
->s_encrypt_pw_salt
)) {
792 err
= mnt_want_write_file(filp
);
795 handle
= ext4_journal_start_sb(sb
, EXT4_HT_MISC
, 1);
796 if (IS_ERR(handle
)) {
797 err
= PTR_ERR(handle
);
798 goto pwsalt_err_exit
;
800 err
= ext4_journal_get_write_access(handle
, sbi
->s_sbh
);
802 goto pwsalt_err_journal
;
803 generate_random_uuid(sbi
->s_es
->s_encrypt_pw_salt
);
804 err
= ext4_handle_dirty_metadata(handle
, NULL
,
807 err2
= ext4_journal_stop(handle
);
811 mnt_drop_write_file(filp
);
815 if (copy_to_user((void __user
*) arg
,
816 sbi
->s_es
->s_encrypt_pw_salt
, 16))
820 case EXT4_IOC_GET_ENCRYPTION_POLICY
: {
821 #ifdef CONFIG_EXT4_FS_ENCRYPTION
822 struct fscrypt_policy policy
;
825 if (!ext4_encrypted_inode(inode
))
827 err
= fscrypt_get_policy(inode
, &policy
);
830 if (copy_to_user((void __user
*)arg
, &policy
, sizeof(policy
)))
837 case EXT4_IOC_FSGETXATTR
:
841 memset(&fa
, 0, sizeof(struct fsxattr
));
842 ext4_get_inode_flags(ei
);
843 fa
.fsx_xflags
= ext4_iflags_to_xflags(ei
->i_flags
& EXT4_FL_USER_VISIBLE
);
845 if (EXT4_HAS_RO_COMPAT_FEATURE(inode
->i_sb
,
846 EXT4_FEATURE_RO_COMPAT_PROJECT
)) {
847 fa
.fsx_projid
= (__u32
)from_kprojid(&init_user_ns
,
848 EXT4_I(inode
)->i_projid
);
851 if (copy_to_user((struct fsxattr __user
*)arg
,
856 case EXT4_IOC_FSSETXATTR
:
861 if (copy_from_user(&fa
, (struct fsxattr __user
*)arg
,
865 /* Make sure caller has proper permission */
866 if (!inode_owner_or_capable(inode
))
869 err
= mnt_want_write_file(filp
);
873 flags
= ext4_xflags_to_iflags(fa
.fsx_xflags
);
874 flags
= ext4_mask_flags(inode
->i_mode
, flags
);
877 flags
= (ei
->i_flags
& ~EXT4_FL_XFLAG_VISIBLE
) |
878 (flags
& EXT4_FL_XFLAG_VISIBLE
);
879 err
= ext4_ioctl_setflags(inode
, flags
);
881 mnt_drop_write_file(filp
);
885 err
= ext4_ioctl_setproject(filp
, fa
.fsx_projid
);
897 long ext4_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
899 /* These are just misnamed, they actually get/put from/to user an int */
901 case EXT4_IOC32_GETFLAGS
:
902 cmd
= EXT4_IOC_GETFLAGS
;
904 case EXT4_IOC32_SETFLAGS
:
905 cmd
= EXT4_IOC_SETFLAGS
;
907 case EXT4_IOC32_GETVERSION
:
908 cmd
= EXT4_IOC_GETVERSION
;
910 case EXT4_IOC32_SETVERSION
:
911 cmd
= EXT4_IOC_SETVERSION
;
913 case EXT4_IOC32_GROUP_EXTEND
:
914 cmd
= EXT4_IOC_GROUP_EXTEND
;
916 case EXT4_IOC32_GETVERSION_OLD
:
917 cmd
= EXT4_IOC_GETVERSION_OLD
;
919 case EXT4_IOC32_SETVERSION_OLD
:
920 cmd
= EXT4_IOC_SETVERSION_OLD
;
922 case EXT4_IOC32_GETRSVSZ
:
923 cmd
= EXT4_IOC_GETRSVSZ
;
925 case EXT4_IOC32_SETRSVSZ
:
926 cmd
= EXT4_IOC_SETRSVSZ
;
928 case EXT4_IOC32_GROUP_ADD
: {
929 struct compat_ext4_new_group_input __user
*uinput
;
930 struct ext4_new_group_input input
;
934 uinput
= compat_ptr(arg
);
935 err
= get_user(input
.group
, &uinput
->group
);
936 err
|= get_user(input
.block_bitmap
, &uinput
->block_bitmap
);
937 err
|= get_user(input
.inode_bitmap
, &uinput
->inode_bitmap
);
938 err
|= get_user(input
.inode_table
, &uinput
->inode_table
);
939 err
|= get_user(input
.blocks_count
, &uinput
->blocks_count
);
940 err
|= get_user(input
.reserved_blocks
,
941 &uinput
->reserved_blocks
);
946 err
= ext4_ioctl(file
, EXT4_IOC_GROUP_ADD
,
947 (unsigned long) &input
);
951 case EXT4_IOC_MOVE_EXT
:
952 case EXT4_IOC_RESIZE_FS
:
953 case EXT4_IOC_PRECACHE_EXTENTS
:
954 case EXT4_IOC_SET_ENCRYPTION_POLICY
:
955 case EXT4_IOC_GET_ENCRYPTION_PWSALT
:
956 case EXT4_IOC_GET_ENCRYPTION_POLICY
:
961 return ext4_ioctl(file
, cmd
, (unsigned long) compat_ptr(arg
));