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"
24 * Swap memory between @a and @b for @len bytes.
26 * @a: pointer to first memory area
27 * @b: pointer to second memory area
28 * @len: number of bytes to swap
31 static void memswap(void *a, void *b, size_t len)
33 unsigned char *ap, *bp;
35 ap = (unsigned char *)a;
36 bp = (unsigned char *)b;
45 * Swap i_data and associated attributes between @inode1 and @inode2.
46 * This function is used for the primary swap between inode1 and inode2
47 * and also to revert this primary swap in case of errors.
49 * Therefore you have to make sure, that calling this method twice
50 * will revert all changes.
52 * @inode1: pointer to first inode
53 * @inode2: pointer to second inode
55 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
58 struct ext4_inode_info *ei1;
59 struct ext4_inode_info *ei2;
64 memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags));
65 memswap(&inode1->i_version, &inode2->i_version,
66 sizeof(inode1->i_version));
67 memswap(&inode1->i_blocks, &inode2->i_blocks,
68 sizeof(inode1->i_blocks));
69 memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes));
70 memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime));
71 memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime));
73 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
74 memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags));
75 memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize));
76 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
77 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
79 isize = i_size_read(inode1);
80 i_size_write(inode1, i_size_read(inode2));
81 i_size_write(inode2, isize);
85 * Swap the information from the given @inode and the inode
86 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
87 * important fields of the inodes.
89 * @sb: the super block of the filesystem
90 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
93 static long swap_inode_boot_loader(struct super_block *sb,
98 struct inode *inode_bl;
99 struct ext4_inode_info *ei_bl;
100 struct ext4_sb_info *sbi = EXT4_SB(sb);
102 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
105 if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
108 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
109 if (IS_ERR(inode_bl))
110 return PTR_ERR(inode_bl);
111 ei_bl = EXT4_I(inode_bl);
113 filemap_flush(inode->i_mapping);
114 filemap_flush(inode_bl->i_mapping);
116 /* Protect orig inodes against a truncate and make sure,
117 * that only 1 swap_inode_boot_loader is running. */
118 lock_two_nondirectories(inode, inode_bl);
120 truncate_inode_pages(&inode->i_data, 0);
121 truncate_inode_pages(&inode_bl->i_data, 0);
123 /* Wait for all existing dio workers */
124 ext4_inode_block_unlocked_dio(inode);
125 ext4_inode_block_unlocked_dio(inode_bl);
126 inode_dio_wait(inode);
127 inode_dio_wait(inode_bl);
129 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
130 if (IS_ERR(handle)) {
132 goto journal_err_out;
135 /* Protect extent tree against block allocations via delalloc */
136 ext4_double_down_write_data_sem(inode, inode_bl);
138 if (inode_bl->i_nlink == 0) {
139 /* this inode has never been used as a BOOT_LOADER */
140 set_nlink(inode_bl, 1);
141 i_uid_write(inode_bl, 0);
142 i_gid_write(inode_bl, 0);
143 inode_bl->i_flags = 0;
145 inode_bl->i_version = 1;
146 i_size_write(inode_bl, 0);
147 inode_bl->i_mode = S_IFREG;
148 if (ext4_has_feature_extents(sb)) {
149 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
150 ext4_ext_tree_init(handle, inode_bl);
152 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
155 swap_inode_data(inode, inode_bl);
157 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
159 spin_lock(&sbi->s_next_gen_lock);
160 inode->i_generation = sbi->s_next_generation++;
161 inode_bl->i_generation = sbi->s_next_generation++;
162 spin_unlock(&sbi->s_next_gen_lock);
164 ext4_discard_preallocations(inode);
166 err = ext4_mark_inode_dirty(handle, inode);
168 ext4_warning(inode->i_sb,
169 "couldn't mark inode #%lu dirty (err %d)",
171 /* Revert all changes: */
172 swap_inode_data(inode, inode_bl);
174 err = ext4_mark_inode_dirty(handle, inode_bl);
176 ext4_warning(inode_bl->i_sb,
177 "couldn't mark inode #%lu dirty (err %d)",
178 inode_bl->i_ino, err);
179 /* Revert all changes: */
180 swap_inode_data(inode, inode_bl);
181 ext4_mark_inode_dirty(handle, inode);
184 ext4_journal_stop(handle);
185 ext4_double_up_write_data_sem(inode, inode_bl);
188 ext4_inode_resume_unlocked_dio(inode);
189 ext4_inode_resume_unlocked_dio(inode_bl);
190 unlock_two_nondirectories(inode, inode_bl);
195 #ifdef CONFIG_EXT4_FS_ENCRYPTION
196 static int uuid_is_zero(__u8 u[16])
200 for (i = 0; i < 16; i++)
207 static int ext4_ioctl_setflags(struct inode *inode,
210 struct ext4_inode_info *ei = EXT4_I(inode);
211 handle_t *handle = NULL;
212 int err = -EPERM, migrate = 0;
213 struct ext4_iloc iloc;
214 unsigned int oldflags, mask, i;
217 /* Is it quota file? Do not allow user to mess with it */
218 if (IS_NOQUOTA(inode))
221 oldflags = ei->i_flags;
223 /* The JOURNAL_DATA flag is modifiable only by root */
224 jflag = flags & EXT4_JOURNAL_DATA_FL;
227 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
228 * the relevant capability.
230 * This test looks nicer. Thanks to Pauline Middelink
232 if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
233 if (!capable(CAP_LINUX_IMMUTABLE))
238 * The JOURNAL_DATA flag can only be changed by
239 * the relevant capability.
241 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
242 if (!capable(CAP_SYS_RESOURCE))
245 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
248 if (flags & EXT4_EOFBLOCKS_FL) {
249 /* we don't support adding EOFBLOCKS flag */
250 if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
254 } else if (oldflags & EXT4_EOFBLOCKS_FL) {
255 err = ext4_truncate(inode);
260 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
261 if (IS_ERR(handle)) {
262 err = PTR_ERR(handle);
266 ext4_handle_sync(handle);
267 err = ext4_reserve_inode_write(handle, inode, &iloc);
271 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
272 if (!(mask & EXT4_FL_USER_MODIFIABLE))
274 /* These flags get special treatment later */
275 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
278 ext4_set_inode_flag(inode, i);
280 ext4_clear_inode_flag(inode, i);
283 ext4_set_inode_flags(inode);
284 inode->i_ctime = current_time(inode);
286 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
288 ext4_journal_stop(handle);
292 if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
293 err = ext4_change_inode_journal_flag(inode, jflag);
297 if (flags & EXT4_EXTENTS_FL)
298 err = ext4_ext_migrate(inode);
300 err = ext4_ind_migrate(inode);
308 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
310 struct inode *inode = file_inode(filp);
311 struct super_block *sb = inode->i_sb;
312 struct ext4_inode_info *ei = EXT4_I(inode);
316 struct ext4_iloc iloc;
317 struct ext4_inode *raw_inode;
318 struct dquot *transfer_to[MAXQUOTAS] = { };
320 if (!ext4_has_feature_project(sb)) {
321 if (projid != EXT4_DEF_PROJID)
327 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
330 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
332 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
335 err = mnt_want_write_file(filp);
341 /* Is it quota file? Do not allow user to mess with it */
342 if (IS_NOQUOTA(inode))
345 err = ext4_get_inode_loc(inode, &iloc);
349 raw_inode = ext4_raw_inode(&iloc);
350 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
357 dquot_initialize(inode);
359 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
360 EXT4_QUOTA_INIT_BLOCKS(sb) +
361 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
362 if (IS_ERR(handle)) {
363 err = PTR_ERR(handle);
367 err = ext4_reserve_inode_write(handle, inode, &iloc);
371 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
372 if (!IS_ERR(transfer_to[PRJQUOTA])) {
373 err = __dquot_transfer(inode, transfer_to);
374 dqput(transfer_to[PRJQUOTA]);
379 EXT4_I(inode)->i_projid = kprojid;
380 inode->i_ctime = current_time(inode);
382 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
386 ext4_journal_stop(handle);
389 mnt_drop_write_file(filp);
393 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
395 if (projid != EXT4_DEF_PROJID)
401 /* Transfer internal flags to xflags */
402 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
406 if (iflags & EXT4_SYNC_FL)
407 xflags |= FS_XFLAG_SYNC;
408 if (iflags & EXT4_IMMUTABLE_FL)
409 xflags |= FS_XFLAG_IMMUTABLE;
410 if (iflags & EXT4_APPEND_FL)
411 xflags |= FS_XFLAG_APPEND;
412 if (iflags & EXT4_NODUMP_FL)
413 xflags |= FS_XFLAG_NODUMP;
414 if (iflags & EXT4_NOATIME_FL)
415 xflags |= FS_XFLAG_NOATIME;
416 if (iflags & EXT4_PROJINHERIT_FL)
417 xflags |= FS_XFLAG_PROJINHERIT;
421 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
422 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
423 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
425 /* Transfer xflags flags to internal */
426 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
428 unsigned long iflags = 0;
430 if (xflags & FS_XFLAG_SYNC)
431 iflags |= EXT4_SYNC_FL;
432 if (xflags & FS_XFLAG_IMMUTABLE)
433 iflags |= EXT4_IMMUTABLE_FL;
434 if (xflags & FS_XFLAG_APPEND)
435 iflags |= EXT4_APPEND_FL;
436 if (xflags & FS_XFLAG_NODUMP)
437 iflags |= EXT4_NODUMP_FL;
438 if (xflags & FS_XFLAG_NOATIME)
439 iflags |= EXT4_NOATIME_FL;
440 if (xflags & FS_XFLAG_PROJINHERIT)
441 iflags |= EXT4_PROJINHERIT_FL;
446 int ext4_shutdown(struct super_block *sb, unsigned long arg)
448 struct ext4_sb_info *sbi = EXT4_SB(sb);
451 if (!capable(CAP_SYS_ADMIN))
454 if (get_user(flags, (__u32 __user *)arg))
457 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
460 if (ext4_forced_shutdown(sbi))
463 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
466 case EXT4_GOING_FLAGS_DEFAULT:
467 freeze_bdev(sb->s_bdev);
468 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
469 thaw_bdev(sb->s_bdev, sb);
471 case EXT4_GOING_FLAGS_LOGFLUSH:
472 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
473 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
474 (void) ext4_force_commit(sb);
475 jbd2_journal_abort(sbi->s_journal, 0);
478 case EXT4_GOING_FLAGS_NOLOGFLUSH:
479 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
480 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
482 jbd2_journal_abort(sbi->s_journal, 0);
488 clear_opt(sb, DISCARD);
492 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
494 struct inode *inode = file_inode(filp);
495 struct super_block *sb = inode->i_sb;
496 struct ext4_inode_info *ei = EXT4_I(inode);
499 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
502 case EXT4_IOC_GETFLAGS:
503 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
504 return put_user(flags, (int __user *) arg);
505 case EXT4_IOC_SETFLAGS: {
508 if (!inode_owner_or_capable(inode))
511 if (get_user(flags, (int __user *) arg))
514 if (flags & ~EXT4_FL_USER_VISIBLE)
517 * chattr(1) grabs flags via GETFLAGS, modifies the result and
518 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
519 * more restrictive than just silently masking off visible but
520 * not settable flags as we always did.
522 flags &= EXT4_FL_USER_MODIFIABLE;
523 if (ext4_mask_flags(inode->i_mode, flags) != flags)
526 err = mnt_want_write_file(filp);
531 err = ext4_ioctl_setflags(inode, flags);
533 mnt_drop_write_file(filp);
536 case EXT4_IOC_GETVERSION:
537 case EXT4_IOC_GETVERSION_OLD:
538 return put_user(inode->i_generation, (int __user *) arg);
539 case EXT4_IOC_SETVERSION:
540 case EXT4_IOC_SETVERSION_OLD: {
542 struct ext4_iloc iloc;
546 if (!inode_owner_or_capable(inode))
549 if (ext4_has_metadata_csum(inode->i_sb)) {
550 ext4_warning(sb, "Setting inode version is not "
551 "supported with metadata_csum enabled.");
555 err = mnt_want_write_file(filp);
558 if (get_user(generation, (int __user *) arg)) {
564 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
565 if (IS_ERR(handle)) {
566 err = PTR_ERR(handle);
569 err = ext4_reserve_inode_write(handle, inode, &iloc);
571 inode->i_ctime = current_time(inode);
572 inode->i_generation = generation;
573 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
575 ext4_journal_stop(handle);
580 mnt_drop_write_file(filp);
583 case EXT4_IOC_GROUP_EXTEND: {
584 ext4_fsblk_t n_blocks_count;
587 err = ext4_resize_begin(sb);
591 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
593 goto group_extend_out;
596 if (ext4_has_feature_bigalloc(sb)) {
597 ext4_msg(sb, KERN_ERR,
598 "Online resizing not supported with bigalloc");
600 goto group_extend_out;
603 err = mnt_want_write_file(filp);
605 goto group_extend_out;
607 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
608 if (EXT4_SB(sb)->s_journal) {
609 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
610 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
611 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
615 mnt_drop_write_file(filp);
621 case EXT4_IOC_MOVE_EXT: {
622 struct move_extent me;
626 if (!(filp->f_mode & FMODE_READ) ||
627 !(filp->f_mode & FMODE_WRITE))
630 if (copy_from_user(&me,
631 (struct move_extent __user *)arg, sizeof(me)))
635 donor = fdget(me.donor_fd);
639 if (!(donor.file->f_mode & FMODE_WRITE)) {
644 if (ext4_has_feature_bigalloc(sb)) {
645 ext4_msg(sb, KERN_ERR,
646 "Online defrag not supported with bigalloc");
649 } else if (IS_DAX(inode)) {
650 ext4_msg(sb, KERN_ERR,
651 "Online defrag not supported with DAX");
656 err = mnt_want_write_file(filp);
660 err = ext4_move_extents(filp, donor.file, me.orig_start,
661 me.donor_start, me.len, &me.moved_len);
662 mnt_drop_write_file(filp);
664 if (copy_to_user((struct move_extent __user *)arg,
672 case EXT4_IOC_GROUP_ADD: {
673 struct ext4_new_group_data input;
676 err = ext4_resize_begin(sb);
680 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
686 if (ext4_has_feature_bigalloc(sb)) {
687 ext4_msg(sb, KERN_ERR,
688 "Online resizing not supported with bigalloc");
693 err = mnt_want_write_file(filp);
697 err = ext4_group_add(sb, &input);
698 if (EXT4_SB(sb)->s_journal) {
699 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
700 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
701 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
705 mnt_drop_write_file(filp);
706 if (!err && ext4_has_group_desc_csum(sb) &&
707 test_opt(sb, INIT_INODE_TABLE))
708 err = ext4_register_li_request(sb, input.group);
714 case EXT4_IOC_MIGRATE:
717 if (!inode_owner_or_capable(inode))
720 err = mnt_want_write_file(filp);
724 * inode_mutex prevent write and truncate on the file.
725 * Read still goes through. We take i_data_sem in
726 * ext4_ext_swap_inode_data before we switch the
727 * inode format to prevent read.
730 err = ext4_ext_migrate(inode);
731 inode_unlock((inode));
732 mnt_drop_write_file(filp);
736 case EXT4_IOC_ALLOC_DA_BLKS:
739 if (!inode_owner_or_capable(inode))
742 err = mnt_want_write_file(filp);
745 err = ext4_alloc_da_blocks(inode);
746 mnt_drop_write_file(filp);
750 case EXT4_IOC_SWAP_BOOT:
753 if (!(filp->f_mode & FMODE_WRITE))
755 err = mnt_want_write_file(filp);
758 err = swap_inode_boot_loader(sb, inode);
759 mnt_drop_write_file(filp);
763 case EXT4_IOC_RESIZE_FS: {
764 ext4_fsblk_t n_blocks_count;
765 int err = 0, err2 = 0;
766 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
768 if (ext4_has_feature_bigalloc(sb)) {
769 ext4_msg(sb, KERN_ERR,
770 "Online resizing not (yet) supported with bigalloc");
774 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
779 err = ext4_resize_begin(sb);
783 err = mnt_want_write_file(filp);
787 err = ext4_resize_fs(sb, n_blocks_count);
788 if (EXT4_SB(sb)->s_journal) {
789 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
790 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
791 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
795 mnt_drop_write_file(filp);
796 if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
797 ext4_has_group_desc_csum(sb) &&
798 test_opt(sb, INIT_INODE_TABLE))
799 err = ext4_register_li_request(sb, o_group);
808 struct request_queue *q = bdev_get_queue(sb->s_bdev);
809 struct fstrim_range range;
812 if (!capable(CAP_SYS_ADMIN))
815 if (!blk_queue_discard(q))
818 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
822 range.minlen = max((unsigned int)range.minlen,
823 q->limits.discard_granularity);
824 ret = ext4_trim_fs(sb, &range);
828 if (copy_to_user((struct fstrim_range __user *)arg, &range,
834 case EXT4_IOC_PRECACHE_EXTENTS:
835 return ext4_ext_precache(inode);
837 case EXT4_IOC_SET_ENCRYPTION_POLICY:
838 if (!ext4_has_feature_encrypt(sb))
840 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
842 case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
843 #ifdef CONFIG_EXT4_FS_ENCRYPTION
845 struct ext4_sb_info *sbi = EXT4_SB(sb);
848 if (!ext4_has_feature_encrypt(sb))
850 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
851 err = mnt_want_write_file(filp);
854 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
855 if (IS_ERR(handle)) {
856 err = PTR_ERR(handle);
857 goto pwsalt_err_exit;
859 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
861 goto pwsalt_err_journal;
862 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
863 err = ext4_handle_dirty_metadata(handle, NULL,
866 err2 = ext4_journal_stop(handle);
870 mnt_drop_write_file(filp);
874 if (copy_to_user((void __user *) arg,
875 sbi->s_es->s_encrypt_pw_salt, 16))
882 case EXT4_IOC_GET_ENCRYPTION_POLICY:
883 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
885 case EXT4_IOC_FSGETXATTR:
889 memset(&fa, 0, sizeof(struct fsxattr));
890 fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
892 if (ext4_has_feature_project(inode->i_sb)) {
893 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
894 EXT4_I(inode)->i_projid);
897 if (copy_to_user((struct fsxattr __user *)arg,
902 case EXT4_IOC_FSSETXATTR:
907 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
911 /* Make sure caller has proper permission */
912 if (!inode_owner_or_capable(inode))
915 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
918 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
919 if (ext4_mask_flags(inode->i_mode, flags) != flags)
922 err = mnt_want_write_file(filp);
927 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
928 (flags & EXT4_FL_XFLAG_VISIBLE);
929 err = ext4_ioctl_setflags(inode, flags);
931 mnt_drop_write_file(filp);
935 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
941 case EXT4_IOC_SHUTDOWN:
942 return ext4_shutdown(sb, arg);
949 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
951 /* These are just misnamed, they actually get/put from/to user an int */
953 case EXT4_IOC32_GETFLAGS:
954 cmd = EXT4_IOC_GETFLAGS;
956 case EXT4_IOC32_SETFLAGS:
957 cmd = EXT4_IOC_SETFLAGS;
959 case EXT4_IOC32_GETVERSION:
960 cmd = EXT4_IOC_GETVERSION;
962 case EXT4_IOC32_SETVERSION:
963 cmd = EXT4_IOC_SETVERSION;
965 case EXT4_IOC32_GROUP_EXTEND:
966 cmd = EXT4_IOC_GROUP_EXTEND;
968 case EXT4_IOC32_GETVERSION_OLD:
969 cmd = EXT4_IOC_GETVERSION_OLD;
971 case EXT4_IOC32_SETVERSION_OLD:
972 cmd = EXT4_IOC_SETVERSION_OLD;
974 case EXT4_IOC32_GETRSVSZ:
975 cmd = EXT4_IOC_GETRSVSZ;
977 case EXT4_IOC32_SETRSVSZ:
978 cmd = EXT4_IOC_SETRSVSZ;
980 case EXT4_IOC32_GROUP_ADD: {
981 struct compat_ext4_new_group_input __user *uinput;
982 struct ext4_new_group_input input;
986 uinput = compat_ptr(arg);
987 err = get_user(input.group, &uinput->group);
988 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
989 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
990 err |= get_user(input.inode_table, &uinput->inode_table);
991 err |= get_user(input.blocks_count, &uinput->blocks_count);
992 err |= get_user(input.reserved_blocks,
993 &uinput->reserved_blocks);
998 err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
999 (unsigned long) &input);
1003 case EXT4_IOC_MOVE_EXT:
1004 case EXT4_IOC_RESIZE_FS:
1005 case EXT4_IOC_PRECACHE_EXTENTS:
1006 case EXT4_IOC_SET_ENCRYPTION_POLICY:
1007 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1008 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1009 case EXT4_IOC_SHUTDOWN:
1012 return -ENOIOCTLCMD;
1014 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));