1 // SPDX-License-Identifier: GPL-2.0
3 * linux/fs/ext4/ioctl.c
5 * Copyright (C) 1993, 1994, 1995
6 * Remy Card (card@masi.ibp.fr)
7 * Laboratoire MASI - Institut Blaise Pascal
8 * Universite Pierre et Marie Curie (Paris VI)
12 #include <linux/capability.h>
13 #include <linux/time.h>
14 #include <linux/compat.h>
15 #include <linux/mount.h>
16 #include <linux/file.h>
17 #include <linux/quotaops.h>
18 #include <linux/random.h>
19 #include <linux/uaccess.h>
20 #include <linux/delay.h>
21 #include <linux/iversion.h>
22 #include <linux/fileattr.h>
23 #include <linux/uuid.h>
24 #include "ext4_jbd2.h"
26 #include <linux/fsmap.h>
28 #include <trace/events/ext4.h>
30 typedef void ext4_update_sb_callback(struct ext4_super_block *es,
34 * Superblock modification callback function for changing file system
37 static void ext4_sb_setlabel(struct ext4_super_block *es, const void *arg)
39 /* Sanity check, this should never happen */
40 BUILD_BUG_ON(sizeof(es->s_volume_name) < EXT4_LABEL_MAX);
42 memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX);
46 * Superblock modification callback function for changing file system
49 static void ext4_sb_setuuid(struct ext4_super_block *es, const void *arg)
51 memcpy(es->s_uuid, (__u8 *)arg, UUID_SIZE);
55 int ext4_update_primary_sb(struct super_block *sb, handle_t *handle,
56 ext4_update_sb_callback func,
60 struct ext4_sb_info *sbi = EXT4_SB(sb);
61 struct buffer_head *bh = sbi->s_sbh;
62 struct ext4_super_block *es = sbi->s_es;
64 trace_ext4_update_sb(sb, bh->b_blocknr, 1);
66 BUFFER_TRACE(bh, "get_write_access");
67 err = ext4_journal_get_write_access(handle, sb,
75 ext4_superblock_csum_set(sb);
78 if (buffer_write_io_error(bh) || !buffer_uptodate(bh)) {
79 ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "
80 "superblock detected");
81 clear_buffer_write_io_error(bh);
82 set_buffer_uptodate(bh);
85 err = ext4_handle_dirty_metadata(handle, NULL, bh);
88 err = sync_dirty_buffer(bh);
90 ext4_std_error(sb, err);
95 * Update one backup superblock in the group 'grp' using the callback
96 * function 'func' and argument 'arg'. If the handle is NULL the
97 * modification is not journalled.
99 * Returns: 0 when no modification was done (no superblock in the group)
100 * 1 when the modification was successful
103 static int ext4_update_backup_sb(struct super_block *sb,
104 handle_t *handle, ext4_group_t grp,
105 ext4_update_sb_callback func, const void *arg)
108 ext4_fsblk_t sb_block;
109 struct buffer_head *bh;
110 unsigned long offset = 0;
111 struct ext4_super_block *es;
113 if (!ext4_bg_has_super(sb, grp))
117 * For the group 0 there is always 1k padding, so we have
118 * either adjust offset, or sb_block depending on blocksize
121 sb_block = 1 * EXT4_MIN_BLOCK_SIZE;
122 offset = do_div(sb_block, sb->s_blocksize);
124 sb_block = ext4_group_first_block_no(sb, grp);
128 trace_ext4_update_sb(sb, sb_block, handle ? 1 : 0);
130 bh = ext4_sb_bread(sb, sb_block, 0);
135 BUFFER_TRACE(bh, "get_write_access");
136 err = ext4_journal_get_write_access(handle, sb,
143 es = (struct ext4_super_block *) (bh->b_data + offset);
145 if (ext4_has_metadata_csum(sb) &&
146 es->s_checksum != ext4_superblock_csum(sb, es)) {
147 ext4_msg(sb, KERN_ERR, "Invalid checksum for backup "
148 "superblock %llu", sb_block);
153 if (ext4_has_metadata_csum(sb))
154 es->s_checksum = ext4_superblock_csum(sb, es);
155 set_buffer_uptodate(bh);
159 err = ext4_handle_dirty_metadata(handle, NULL, bh);
163 BUFFER_TRACE(bh, "marking dirty");
164 mark_buffer_dirty(bh);
166 err = sync_dirty_buffer(bh);
170 ext4_std_error(sb, err);
171 return (err) ? err : 1;
175 * Update primary and backup superblocks using the provided function
176 * func and argument arg.
178 * Only the primary superblock and at most two backup superblock
179 * modifications are journalled; the rest is modified without journal.
180 * This is safe because e2fsck will re-write them if there is a problem,
181 * and we're very unlikely to ever need more than two backups.
184 int ext4_update_superblocks_fn(struct super_block *sb,
185 ext4_update_sb_callback func,
189 ext4_group_t ngroups;
190 unsigned int three = 1;
191 unsigned int five = 5;
192 unsigned int seven = 7;
194 ext4_group_t grp, primary_grp;
195 struct ext4_sb_info *sbi = EXT4_SB(sb);
198 * We can't update superblocks while the online resize is running
200 if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
201 &sbi->s_ext4_flags)) {
202 ext4_msg(sb, KERN_ERR, "Can't modify superblock while"
203 "performing online resize");
208 * We're only going to update primary superblock and two
209 * backup superblocks in this transaction.
211 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3);
212 if (IS_ERR(handle)) {
213 err = PTR_ERR(handle);
217 /* Update primary superblock */
218 err = ext4_update_primary_sb(sb, handle, func, arg);
220 ext4_msg(sb, KERN_ERR, "Failed to update primary "
225 primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr);
226 ngroups = ext4_get_groups_count(sb);
229 * Update backup superblocks. We have to start from group 0
230 * because it might not be where the primary superblock is
231 * if the fs is mounted with -o sb=<backup_sb_block>
235 while (grp < ngroups) {
236 /* Skip primary superblock */
237 if (grp == primary_grp)
240 ret = ext4_update_backup_sb(sb, handle, grp, func, arg);
242 /* Ignore bad checksum; try to update next sb */
243 if (ret == -EFSBADCRC)
250 if (handle && i > 1) {
252 * We're only journalling primary superblock and
253 * two backup superblocks; the rest is not
256 err = ext4_journal_stop(handle);
262 grp = ext4_list_backups(sb, &three, &five, &seven);
267 ret = ext4_journal_stop(handle);
272 clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags);
273 smp_mb__after_atomic();
274 return err ? err : 0;
278 * Swap memory between @a and @b for @len bytes.
280 * @a: pointer to first memory area
281 * @b: pointer to second memory area
282 * @len: number of bytes to swap
285 static void memswap(void *a, void *b, size_t len)
287 unsigned char *ap, *bp;
289 ap = (unsigned char *)a;
290 bp = (unsigned char *)b;
299 * Swap i_data and associated attributes between @inode1 and @inode2.
300 * This function is used for the primary swap between inode1 and inode2
301 * and also to revert this primary swap in case of errors.
303 * Therefore you have to make sure, that calling this method twice
304 * will revert all changes.
306 * @inode1: pointer to first inode
307 * @inode2: pointer to second inode
309 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
312 struct ext4_inode_info *ei1;
313 struct ext4_inode_info *ei2;
315 struct timespec64 ts1, ts2;
317 ei1 = EXT4_I(inode1);
318 ei2 = EXT4_I(inode2);
320 swap(inode1->i_version, inode2->i_version);
322 ts1 = inode_get_atime(inode1);
323 ts2 = inode_get_atime(inode2);
324 inode_set_atime_to_ts(inode1, ts2);
325 inode_set_atime_to_ts(inode2, ts1);
327 ts1 = inode_get_mtime(inode1);
328 ts2 = inode_get_mtime(inode2);
329 inode_set_mtime_to_ts(inode1, ts2);
330 inode_set_mtime_to_ts(inode2, ts1);
332 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
333 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
334 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
335 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
336 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
337 swap(ei1->i_disksize, ei2->i_disksize);
338 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
339 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
341 isize = i_size_read(inode1);
342 i_size_write(inode1, i_size_read(inode2));
343 i_size_write(inode2, isize);
346 void ext4_reset_inode_seed(struct inode *inode)
348 struct ext4_inode_info *ei = EXT4_I(inode);
349 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
350 __le32 inum = cpu_to_le32(inode->i_ino);
351 __le32 gen = cpu_to_le32(inode->i_generation);
354 if (!ext4_has_metadata_csum(inode->i_sb))
357 csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
358 ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
362 * Swap the information from the given @inode and the inode
363 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
364 * important fields of the inodes.
366 * @sb: the super block of the filesystem
367 * @idmap: idmap of the mount the inode was found from
368 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
371 static long swap_inode_boot_loader(struct super_block *sb,
372 struct mnt_idmap *idmap,
377 struct inode *inode_bl;
378 struct ext4_inode_info *ei_bl;
379 qsize_t size, size_bl, diff;
381 unsigned short bytes;
383 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO,
384 EXT4_IGET_SPECIAL | EXT4_IGET_BAD);
385 if (IS_ERR(inode_bl))
386 return PTR_ERR(inode_bl);
387 ei_bl = EXT4_I(inode_bl);
389 /* Protect orig inodes against a truncate and make sure,
390 * that only 1 swap_inode_boot_loader is running. */
391 lock_two_nondirectories(inode, inode_bl);
393 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
394 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
395 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
396 ext4_has_inline_data(inode)) {
398 goto journal_err_out;
401 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
402 !inode_owner_or_capable(idmap, inode) ||
403 !capable(CAP_SYS_ADMIN)) {
405 goto journal_err_out;
408 filemap_invalidate_lock(inode->i_mapping);
409 err = filemap_write_and_wait(inode->i_mapping);
413 err = filemap_write_and_wait(inode_bl->i_mapping);
417 /* Wait for all existing dio workers */
418 inode_dio_wait(inode);
419 inode_dio_wait(inode_bl);
421 truncate_inode_pages(&inode->i_data, 0);
422 truncate_inode_pages(&inode_bl->i_data, 0);
424 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
425 if (IS_ERR(handle)) {
429 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle);
431 /* Protect extent tree against block allocations via delalloc */
432 ext4_double_down_write_data_sem(inode, inode_bl);
434 if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
435 /* this inode has never been used as a BOOT_LOADER */
436 set_nlink(inode_bl, 1);
437 i_uid_write(inode_bl, 0);
438 i_gid_write(inode_bl, 0);
439 inode_bl->i_flags = 0;
441 inode_set_iversion(inode_bl, 1);
442 i_size_write(inode_bl, 0);
443 EXT4_I(inode_bl)->i_disksize = inode_bl->i_size;
444 inode_bl->i_mode = S_IFREG;
445 if (ext4_has_feature_extents(sb)) {
446 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
447 ext4_ext_tree_init(handle, inode_bl);
449 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
452 err = dquot_initialize(inode);
456 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
457 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
458 diff = size - size_bl;
459 swap_inode_data(inode, inode_bl);
461 inode_set_ctime_current(inode);
462 inode_set_ctime_current(inode_bl);
463 inode_inc_iversion(inode);
465 inode->i_generation = get_random_u32();
466 inode_bl->i_generation = get_random_u32();
467 ext4_reset_inode_seed(inode);
468 ext4_reset_inode_seed(inode_bl);
470 ext4_discard_preallocations(inode);
472 err = ext4_mark_inode_dirty(handle, inode);
474 /* No need to update quota information. */
475 ext4_warning(inode->i_sb,
476 "couldn't mark inode #%lu dirty (err %d)",
478 /* Revert all changes: */
479 swap_inode_data(inode, inode_bl);
480 ext4_mark_inode_dirty(handle, inode);
484 blocks = inode_bl->i_blocks;
485 bytes = inode_bl->i_bytes;
486 inode_bl->i_blocks = inode->i_blocks;
487 inode_bl->i_bytes = inode->i_bytes;
488 err = ext4_mark_inode_dirty(handle, inode_bl);
490 /* No need to update quota information. */
491 ext4_warning(inode_bl->i_sb,
492 "couldn't mark inode #%lu dirty (err %d)",
493 inode_bl->i_ino, err);
497 /* Bootloader inode should not be counted into quota information. */
499 dquot_free_space(inode, diff);
501 err = dquot_alloc_space(inode, -1 * diff);
505 /* Revert all changes: */
506 inode_bl->i_blocks = blocks;
507 inode_bl->i_bytes = bytes;
508 swap_inode_data(inode, inode_bl);
509 ext4_mark_inode_dirty(handle, inode);
510 ext4_mark_inode_dirty(handle, inode_bl);
514 ext4_journal_stop(handle);
515 ext4_double_up_write_data_sem(inode, inode_bl);
518 filemap_invalidate_unlock(inode->i_mapping);
520 unlock_two_nondirectories(inode, inode_bl);
526 * If immutable is set and we are not clearing it, we're not allowed to change
527 * anything else in the inode. Don't error out if we're only trying to set
528 * immutable on an immutable file.
530 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
533 struct ext4_inode_info *ei = EXT4_I(inode);
534 unsigned int oldflags = ei->i_flags;
536 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
539 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
541 if (ext4_has_feature_project(inode->i_sb) &&
542 __kprojid_val(ei->i_projid) != new_projid)
548 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
550 struct ext4_inode_info *ei = EXT4_I(inode);
552 if (S_ISDIR(inode->i_mode))
555 if (test_opt2(inode->i_sb, DAX_NEVER) ||
556 test_opt(inode->i_sb, DAX_ALWAYS))
559 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
560 d_mark_dontcache(inode);
563 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
566 /* Allow the DAX flag to be changed on inline directories */
567 if (S_ISDIR(inode->i_mode)) {
568 flags &= ~EXT4_INLINE_DATA_FL;
569 oldflags &= ~EXT4_INLINE_DATA_FL;
572 if (flags & EXT4_DAX_FL) {
573 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
574 ext4_test_inode_state(inode,
575 EXT4_STATE_VERITY_IN_PROGRESS)) {
580 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
586 static int ext4_ioctl_setflags(struct inode *inode,
589 struct ext4_inode_info *ei = EXT4_I(inode);
590 handle_t *handle = NULL;
591 int err = -EPERM, migrate = 0;
592 struct ext4_iloc iloc;
593 unsigned int oldflags, mask, i;
594 struct super_block *sb = inode->i_sb;
596 /* Is it quota file? Do not allow user to mess with it */
597 if (ext4_is_quota_file(inode))
600 oldflags = ei->i_flags;
602 * The JOURNAL_DATA flag can only be changed by
603 * the relevant capability.
605 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
606 if (!capable(CAP_SYS_RESOURCE))
610 if (!dax_compatible(inode, oldflags, flags)) {
615 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
618 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
619 if (!ext4_has_feature_casefold(sb)) {
624 if (!S_ISDIR(inode->i_mode)) {
629 if (!ext4_empty_dir(inode)) {
636 * Wait for all pending directio and then flush all the dirty pages
637 * for this file. The flush marks all the pages readonly, so any
638 * subsequent attempt to write to the file (particularly mmap pages)
639 * will come through the filesystem and fail.
641 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
642 (flags & EXT4_IMMUTABLE_FL)) {
643 inode_dio_wait(inode);
644 err = filemap_write_and_wait(inode->i_mapping);
649 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
650 if (IS_ERR(handle)) {
651 err = PTR_ERR(handle);
655 ext4_handle_sync(handle);
656 err = ext4_reserve_inode_write(handle, inode, &iloc);
660 ext4_dax_dontcache(inode, flags);
662 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
663 if (!(mask & EXT4_FL_USER_MODIFIABLE))
665 /* These flags get special treatment later */
666 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
669 ext4_set_inode_flag(inode, i);
671 ext4_clear_inode_flag(inode, i);
674 ext4_set_inode_flags(inode, false);
676 inode_set_ctime_current(inode);
677 inode_inc_iversion(inode);
679 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
681 ext4_journal_stop(handle);
685 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
687 * Changes to the journaling mode can cause unsafe changes to
688 * S_DAX if the inode is DAX
695 err = ext4_change_inode_journal_flag(inode,
696 flags & EXT4_JOURNAL_DATA_FL);
701 if (flags & EXT4_EXTENTS_FL)
702 err = ext4_ext_migrate(inode);
704 err = ext4_ind_migrate(inode);
712 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
714 struct super_block *sb = inode->i_sb;
715 struct ext4_inode_info *ei = EXT4_I(inode);
719 struct ext4_iloc iloc;
720 struct ext4_inode *raw_inode;
721 struct dquot *transfer_to[MAXQUOTAS] = { };
723 if (!ext4_has_feature_project(sb)) {
724 if (projid != EXT4_DEF_PROJID)
730 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
733 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
735 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
739 /* Is it quota file? Do not allow user to mess with it */
740 if (ext4_is_quota_file(inode))
743 err = dquot_initialize(inode);
747 err = ext4_get_inode_loc(inode, &iloc);
751 raw_inode = ext4_raw_inode(&iloc);
752 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
753 err = ext4_expand_extra_isize(inode,
754 EXT4_SB(sb)->s_want_extra_isize,
762 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
763 EXT4_QUOTA_INIT_BLOCKS(sb) +
764 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
766 return PTR_ERR(handle);
768 err = ext4_reserve_inode_write(handle, inode, &iloc);
772 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
773 if (!IS_ERR(transfer_to[PRJQUOTA])) {
775 /* __dquot_transfer() calls back ext4_get_inode_usage() which
776 * counts xattr inode references.
778 down_read(&EXT4_I(inode)->xattr_sem);
779 err = __dquot_transfer(inode, transfer_to);
780 up_read(&EXT4_I(inode)->xattr_sem);
781 dqput(transfer_to[PRJQUOTA]);
786 EXT4_I(inode)->i_projid = kprojid;
787 inode_set_ctime_current(inode);
788 inode_inc_iversion(inode);
790 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
794 ext4_journal_stop(handle);
798 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
800 if (projid != EXT4_DEF_PROJID)
806 int ext4_force_shutdown(struct super_block *sb, u32 flags)
808 struct ext4_sb_info *sbi = EXT4_SB(sb);
811 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
814 if (ext4_forced_shutdown(sb))
817 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
818 trace_ext4_shutdown(sb, flags);
821 case EXT4_GOING_FLAGS_DEFAULT:
822 ret = bdev_freeze(sb->s_bdev);
825 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
826 bdev_thaw(sb->s_bdev);
828 case EXT4_GOING_FLAGS_LOGFLUSH:
829 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
830 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
831 (void) ext4_force_commit(sb);
832 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
835 case EXT4_GOING_FLAGS_NOLOGFLUSH:
836 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
837 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
838 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
843 clear_opt(sb, DISCARD);
847 static int ext4_ioctl_shutdown(struct super_block *sb, unsigned long arg)
851 if (!capable(CAP_SYS_ADMIN))
854 if (get_user(flags, (__u32 __user *)arg))
857 return ext4_force_shutdown(sb, flags);
860 struct getfsmap_info {
861 struct super_block *gi_sb;
862 struct fsmap_head __user *gi_data;
867 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
869 struct getfsmap_info *info = priv;
872 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
874 info->gi_last_flags = xfm->fmr_flags;
875 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
876 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
877 sizeof(struct fsmap)))
883 static int ext4_ioc_getfsmap(struct super_block *sb,
884 struct fsmap_head __user *arg)
886 struct getfsmap_info info = { NULL };
887 struct ext4_fsmap_head xhead = {0};
888 struct fsmap_head head;
889 bool aborted = false;
892 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
894 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
895 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
896 sizeof(head.fmh_keys[0].fmr_reserved)) ||
897 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
898 sizeof(head.fmh_keys[1].fmr_reserved)))
901 * ext4 doesn't report file extents at all, so the only valid
902 * file offsets are the magic ones (all zeroes or all ones).
904 if (head.fmh_keys[0].fmr_offset ||
905 (head.fmh_keys[1].fmr_offset != 0 &&
906 head.fmh_keys[1].fmr_offset != -1ULL))
909 xhead.fmh_iflags = head.fmh_iflags;
910 xhead.fmh_count = head.fmh_count;
911 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
912 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
914 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
915 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
919 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
920 if (error == EXT4_QUERY_RANGE_ABORT)
925 /* If we didn't abort, set the "last" flag in the last fmx */
926 if (!aborted && info.gi_idx) {
927 info.gi_last_flags |= FMR_OF_LAST;
928 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
930 sizeof(info.gi_last_flags)))
934 /* copy back header */
935 head.fmh_entries = xhead.fmh_entries;
936 head.fmh_oflags = xhead.fmh_oflags;
937 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
943 static long ext4_ioctl_group_add(struct file *file,
944 struct ext4_new_group_data *input)
946 struct super_block *sb = file_inode(file)->i_sb;
949 err = ext4_resize_begin(sb);
953 if (ext4_has_feature_bigalloc(sb)) {
954 ext4_msg(sb, KERN_ERR,
955 "Online resizing not supported with bigalloc");
960 err = mnt_want_write_file(file);
964 err = ext4_group_add(sb, input);
965 if (EXT4_SB(sb)->s_journal) {
966 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
967 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
968 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
972 mnt_drop_write_file(file);
973 if (!err && ext4_has_group_desc_csum(sb) &&
974 test_opt(sb, INIT_INODE_TABLE))
975 err = ext4_register_li_request(sb, input->group);
977 err2 = ext4_resize_end(sb, false);
983 int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
985 struct inode *inode = d_inode(dentry);
986 struct ext4_inode_info *ei = EXT4_I(inode);
987 u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
989 if (S_ISREG(inode->i_mode))
990 flags &= ~FS_PROJINHERIT_FL;
992 fileattr_fill_flags(fa, flags);
993 if (ext4_has_feature_project(inode->i_sb))
994 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
999 int ext4_fileattr_set(struct mnt_idmap *idmap,
1000 struct dentry *dentry, struct fileattr *fa)
1002 struct inode *inode = d_inode(dentry);
1003 u32 flags = fa->flags;
1004 int err = -EOPNOTSUPP;
1006 if (flags & ~EXT4_FL_USER_VISIBLE)
1010 * chattr(1) grabs flags via GETFLAGS, modifies the result and
1011 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
1012 * more restrictive than just silently masking off visible but
1013 * not settable flags as we always did.
1015 flags &= EXT4_FL_USER_MODIFIABLE;
1016 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1018 err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
1021 err = ext4_ioctl_setflags(inode, flags);
1024 err = ext4_ioctl_setproject(inode, fa->fsx_projid);
1029 /* So that the fiemap access checks can't overflow on 32 bit machines. */
1030 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
1032 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
1034 struct fiemap fiemap;
1035 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
1036 struct fiemap_extent_info fieinfo = { 0, };
1037 struct inode *inode = file_inode(filp);
1040 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
1043 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
1046 fieinfo.fi_flags = fiemap.fm_flags;
1047 fieinfo.fi_extents_max = fiemap.fm_extent_count;
1048 fieinfo.fi_extents_start = ufiemap->fm_extents;
1050 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
1052 fiemap.fm_flags = fieinfo.fi_flags;
1053 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
1054 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
1060 static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
1064 unsigned int flush_flags = 0;
1065 struct super_block *sb = file_inode(filp)->i_sb;
1067 if (copy_from_user(&flags, (__u32 __user *)arg,
1071 if (!capable(CAP_SYS_ADMIN))
1074 /* check for invalid bits set */
1075 if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
1076 ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
1077 (flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
1080 if (!EXT4_SB(sb)->s_journal)
1083 if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
1084 !bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev))
1087 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
1090 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
1091 flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
1093 if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
1094 flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
1095 pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
1098 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1099 err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
1100 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1105 static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label)
1109 char new_label[EXT4_LABEL_MAX + 1];
1110 struct super_block *sb = file_inode(filp)->i_sb;
1112 if (!capable(CAP_SYS_ADMIN))
1116 * Copy the maximum length allowed for ext4 label with one more to
1117 * find the required terminating null byte in order to test the
1118 * label length. The on disk label doesn't need to be null terminated.
1120 if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1))
1123 len = strnlen(new_label, EXT4_LABEL_MAX + 1);
1124 if (len > EXT4_LABEL_MAX)
1128 * Clear the buffer after the new label
1130 memset(new_label + len, 0, EXT4_LABEL_MAX - len);
1132 ret = mnt_want_write_file(filp);
1136 ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label);
1138 mnt_drop_write_file(filp);
1142 static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label)
1144 char label[EXT4_LABEL_MAX + 1];
1147 * EXT4_LABEL_MAX must always be smaller than FSLABEL_MAX because
1148 * FSLABEL_MAX must include terminating null byte, while s_volume_name
1151 BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX);
1153 memset(label, 0, sizeof(label));
1154 lock_buffer(sbi->s_sbh);
1155 strncpy(label, sbi->s_es->s_volume_name, EXT4_LABEL_MAX);
1156 unlock_buffer(sbi->s_sbh);
1158 if (copy_to_user(user_label, label, sizeof(label)))
1163 static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi,
1164 struct fsuuid __user *ufsuuid)
1166 struct fsuuid fsuuid;
1167 __u8 uuid[UUID_SIZE];
1169 if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
1172 if (fsuuid.fsu_len == 0) {
1173 fsuuid.fsu_len = UUID_SIZE;
1174 if (copy_to_user(&ufsuuid->fsu_len, &fsuuid.fsu_len,
1175 sizeof(fsuuid.fsu_len)))
1180 if (fsuuid.fsu_len < UUID_SIZE || fsuuid.fsu_flags != 0)
1183 lock_buffer(sbi->s_sbh);
1184 memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE);
1185 unlock_buffer(sbi->s_sbh);
1187 fsuuid.fsu_len = UUID_SIZE;
1188 if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid)) ||
1189 copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE))
1194 static int ext4_ioctl_setuuid(struct file *filp,
1195 const struct fsuuid __user *ufsuuid)
1198 struct super_block *sb = file_inode(filp)->i_sb;
1199 struct fsuuid fsuuid;
1200 __u8 uuid[UUID_SIZE];
1202 if (!capable(CAP_SYS_ADMIN))
1206 * If any checksums (group descriptors or metadata) are being used
1207 * then the checksum seed feature is required to change the UUID.
1209 if (((ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb))
1210 && !ext4_has_feature_csum_seed(sb))
1211 || ext4_has_feature_stable_inodes(sb))
1214 if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
1217 if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0)
1220 if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE))
1223 ret = mnt_want_write_file(filp);
1227 ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid);
1228 mnt_drop_write_file(filp);
1233 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1235 struct inode *inode = file_inode(filp);
1236 struct super_block *sb = inode->i_sb;
1237 struct mnt_idmap *idmap = file_mnt_idmap(filp);
1239 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
1242 case FS_IOC_GETFSMAP:
1243 return ext4_ioc_getfsmap(sb, (void __user *)arg);
1244 case EXT4_IOC_GETVERSION:
1245 case EXT4_IOC_GETVERSION_OLD:
1246 return put_user(inode->i_generation, (int __user *) arg);
1247 case EXT4_IOC_SETVERSION:
1248 case EXT4_IOC_SETVERSION_OLD: {
1250 struct ext4_iloc iloc;
1254 if (!inode_owner_or_capable(idmap, inode))
1257 if (ext4_has_metadata_csum(inode->i_sb)) {
1258 ext4_warning(sb, "Setting inode version is not "
1259 "supported with metadata_csum enabled.");
1263 err = mnt_want_write_file(filp);
1266 if (get_user(generation, (int __user *) arg)) {
1268 goto setversion_out;
1272 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
1273 if (IS_ERR(handle)) {
1274 err = PTR_ERR(handle);
1277 err = ext4_reserve_inode_write(handle, inode, &iloc);
1279 inode_set_ctime_current(inode);
1280 inode_inc_iversion(inode);
1281 inode->i_generation = generation;
1282 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
1284 ext4_journal_stop(handle);
1287 inode_unlock(inode);
1289 mnt_drop_write_file(filp);
1292 case EXT4_IOC_GROUP_EXTEND: {
1293 ext4_fsblk_t n_blocks_count;
1296 err = ext4_resize_begin(sb);
1300 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
1302 goto group_extend_out;
1305 if (ext4_has_feature_bigalloc(sb)) {
1306 ext4_msg(sb, KERN_ERR,
1307 "Online resizing not supported with bigalloc");
1309 goto group_extend_out;
1312 err = mnt_want_write_file(filp);
1314 goto group_extend_out;
1316 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
1317 if (EXT4_SB(sb)->s_journal) {
1318 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1319 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1320 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1324 mnt_drop_write_file(filp);
1326 err2 = ext4_resize_end(sb, false);
1332 case EXT4_IOC_MOVE_EXT: {
1333 struct move_extent me;
1337 if (!(filp->f_mode & FMODE_READ) ||
1338 !(filp->f_mode & FMODE_WRITE))
1341 if (copy_from_user(&me,
1342 (struct move_extent __user *)arg, sizeof(me)))
1346 donor = fdget(me.donor_fd);
1350 if (!(donor.file->f_mode & FMODE_WRITE)) {
1355 if (ext4_has_feature_bigalloc(sb)) {
1356 ext4_msg(sb, KERN_ERR,
1357 "Online defrag not supported with bigalloc");
1360 } else if (IS_DAX(inode)) {
1361 ext4_msg(sb, KERN_ERR,
1362 "Online defrag not supported with DAX");
1367 err = mnt_want_write_file(filp);
1371 err = ext4_move_extents(filp, donor.file, me.orig_start,
1372 me.donor_start, me.len, &me.moved_len);
1373 mnt_drop_write_file(filp);
1375 if (copy_to_user((struct move_extent __user *)arg,
1383 case EXT4_IOC_GROUP_ADD: {
1384 struct ext4_new_group_data input;
1386 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1390 return ext4_ioctl_group_add(filp, &input);
1393 case EXT4_IOC_MIGRATE:
1396 if (!inode_owner_or_capable(idmap, inode))
1399 err = mnt_want_write_file(filp);
1403 * inode_mutex prevent write and truncate on the file.
1404 * Read still goes through. We take i_data_sem in
1405 * ext4_ext_swap_inode_data before we switch the
1406 * inode format to prevent read.
1408 inode_lock((inode));
1409 err = ext4_ext_migrate(inode);
1410 inode_unlock((inode));
1411 mnt_drop_write_file(filp);
1415 case EXT4_IOC_ALLOC_DA_BLKS:
1418 if (!inode_owner_or_capable(idmap, inode))
1421 err = mnt_want_write_file(filp);
1424 err = ext4_alloc_da_blocks(inode);
1425 mnt_drop_write_file(filp);
1429 case EXT4_IOC_SWAP_BOOT:
1432 if (!(filp->f_mode & FMODE_WRITE))
1434 err = mnt_want_write_file(filp);
1437 err = swap_inode_boot_loader(sb, idmap, inode);
1438 mnt_drop_write_file(filp);
1442 case EXT4_IOC_RESIZE_FS: {
1443 ext4_fsblk_t n_blocks_count;
1444 int err = 0, err2 = 0;
1445 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1447 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1452 err = ext4_resize_begin(sb);
1456 err = mnt_want_write_file(filp);
1460 err = ext4_resize_fs(sb, n_blocks_count);
1461 if (EXT4_SB(sb)->s_journal) {
1462 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL);
1463 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1464 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1465 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1469 mnt_drop_write_file(filp);
1470 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1471 ext4_has_group_desc_csum(sb) &&
1472 test_opt(sb, INIT_INODE_TABLE))
1473 err = ext4_register_li_request(sb, o_group);
1476 err2 = ext4_resize_end(sb, true);
1484 struct fstrim_range range;
1487 if (!capable(CAP_SYS_ADMIN))
1490 if (!bdev_max_discard_sectors(sb->s_bdev))
1494 * We haven't replayed the journal, so we cannot use our
1495 * block-bitmap-guided storage zapping commands.
1497 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1500 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1504 ret = ext4_trim_fs(sb, &range);
1508 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1514 case EXT4_IOC_PRECACHE_EXTENTS:
1515 return ext4_ext_precache(inode);
1517 case FS_IOC_SET_ENCRYPTION_POLICY:
1518 if (!ext4_has_feature_encrypt(sb))
1520 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1522 case FS_IOC_GET_ENCRYPTION_PWSALT:
1523 return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg);
1525 case FS_IOC_GET_ENCRYPTION_POLICY:
1526 if (!ext4_has_feature_encrypt(sb))
1528 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1530 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1531 if (!ext4_has_feature_encrypt(sb))
1533 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1535 case FS_IOC_ADD_ENCRYPTION_KEY:
1536 if (!ext4_has_feature_encrypt(sb))
1538 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1540 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1541 if (!ext4_has_feature_encrypt(sb))
1543 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1545 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1546 if (!ext4_has_feature_encrypt(sb))
1548 return fscrypt_ioctl_remove_key_all_users(filp,
1549 (void __user *)arg);
1550 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1551 if (!ext4_has_feature_encrypt(sb))
1553 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1555 case FS_IOC_GET_ENCRYPTION_NONCE:
1556 if (!ext4_has_feature_encrypt(sb))
1558 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1560 case EXT4_IOC_CLEAR_ES_CACHE:
1562 if (!inode_owner_or_capable(idmap, inode))
1564 ext4_clear_inode_es(inode);
1568 case EXT4_IOC_GETSTATE:
1572 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1573 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1574 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1575 state |= EXT4_STATE_FLAG_NEW;
1576 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1577 state |= EXT4_STATE_FLAG_NEWENTRY;
1578 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1579 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1581 return put_user(state, (__u32 __user *) arg);
1584 case EXT4_IOC_GET_ES_CACHE:
1585 return ext4_ioctl_get_es_cache(filp, arg);
1587 case EXT4_IOC_SHUTDOWN:
1588 return ext4_ioctl_shutdown(sb, arg);
1590 case FS_IOC_ENABLE_VERITY:
1591 if (!ext4_has_feature_verity(sb))
1593 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1595 case FS_IOC_MEASURE_VERITY:
1596 if (!ext4_has_feature_verity(sb))
1598 return fsverity_ioctl_measure(filp, (void __user *)arg);
1600 case FS_IOC_READ_VERITY_METADATA:
1601 if (!ext4_has_feature_verity(sb))
1603 return fsverity_ioctl_read_metadata(filp,
1604 (const void __user *)arg);
1606 case EXT4_IOC_CHECKPOINT:
1607 return ext4_ioctl_checkpoint(filp, arg);
1609 case FS_IOC_GETFSLABEL:
1610 return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg);
1612 case FS_IOC_SETFSLABEL:
1613 return ext4_ioctl_setlabel(filp,
1614 (const void __user *)arg);
1616 case EXT4_IOC_GETFSUUID:
1617 return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg);
1618 case EXT4_IOC_SETFSUUID:
1619 return ext4_ioctl_setuuid(filp, (const void __user *)arg);
1625 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1627 return __ext4_ioctl(filp, cmd, arg);
1630 #ifdef CONFIG_COMPAT
1631 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1633 /* These are just misnamed, they actually get/put from/to user an int */
1635 case EXT4_IOC32_GETVERSION:
1636 cmd = EXT4_IOC_GETVERSION;
1638 case EXT4_IOC32_SETVERSION:
1639 cmd = EXT4_IOC_SETVERSION;
1641 case EXT4_IOC32_GROUP_EXTEND:
1642 cmd = EXT4_IOC_GROUP_EXTEND;
1644 case EXT4_IOC32_GETVERSION_OLD:
1645 cmd = EXT4_IOC_GETVERSION_OLD;
1647 case EXT4_IOC32_SETVERSION_OLD:
1648 cmd = EXT4_IOC_SETVERSION_OLD;
1650 case EXT4_IOC32_GETRSVSZ:
1651 cmd = EXT4_IOC_GETRSVSZ;
1653 case EXT4_IOC32_SETRSVSZ:
1654 cmd = EXT4_IOC_SETRSVSZ;
1656 case EXT4_IOC32_GROUP_ADD: {
1657 struct compat_ext4_new_group_input __user *uinput;
1658 struct ext4_new_group_data input;
1661 uinput = compat_ptr(arg);
1662 err = get_user(input.group, &uinput->group);
1663 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1664 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1665 err |= get_user(input.inode_table, &uinput->inode_table);
1666 err |= get_user(input.blocks_count, &uinput->blocks_count);
1667 err |= get_user(input.reserved_blocks,
1668 &uinput->reserved_blocks);
1671 return ext4_ioctl_group_add(file, &input);
1673 case EXT4_IOC_MOVE_EXT:
1674 case EXT4_IOC_RESIZE_FS:
1676 case EXT4_IOC_PRECACHE_EXTENTS:
1677 case FS_IOC_SET_ENCRYPTION_POLICY:
1678 case FS_IOC_GET_ENCRYPTION_PWSALT:
1679 case FS_IOC_GET_ENCRYPTION_POLICY:
1680 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1681 case FS_IOC_ADD_ENCRYPTION_KEY:
1682 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1683 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1684 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1685 case FS_IOC_GET_ENCRYPTION_NONCE:
1686 case EXT4_IOC_SHUTDOWN:
1687 case FS_IOC_GETFSMAP:
1688 case FS_IOC_ENABLE_VERITY:
1689 case FS_IOC_MEASURE_VERITY:
1690 case FS_IOC_READ_VERITY_METADATA:
1691 case EXT4_IOC_CLEAR_ES_CACHE:
1692 case EXT4_IOC_GETSTATE:
1693 case EXT4_IOC_GET_ES_CACHE:
1694 case EXT4_IOC_CHECKPOINT:
1695 case FS_IOC_GETFSLABEL:
1696 case FS_IOC_SETFSLABEL:
1697 case EXT4_IOC_GETFSUUID:
1698 case EXT4_IOC_SETFSUUID:
1701 return -ENOIOCTLCMD;
1703 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1707 static void set_overhead(struct ext4_super_block *es, const void *arg)
1709 es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg));
1712 int ext4_update_overhead(struct super_block *sb, bool force)
1714 struct ext4_sb_info *sbi = EXT4_SB(sb);
1719 (sbi->s_overhead == 0 ||
1720 sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters)))
1722 return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead);