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);
162 err = ext4_handle_dirty_metadata(handle, NULL, bh);
166 BUFFER_TRACE(bh, "marking dirty");
167 mark_buffer_dirty(bh);
169 err = sync_dirty_buffer(bh);
173 ext4_std_error(sb, err);
174 return (err) ? err : 1;
178 * Update primary and backup superblocks using the provided function
179 * func and argument arg.
181 * Only the primary superblock and at most two backup superblock
182 * modifications are journalled; the rest is modified without journal.
183 * This is safe because e2fsck will re-write them if there is a problem,
184 * and we're very unlikely to ever need more than two backups.
187 int ext4_update_superblocks_fn(struct super_block *sb,
188 ext4_update_sb_callback func,
192 ext4_group_t ngroups;
193 unsigned int three = 1;
194 unsigned int five = 5;
195 unsigned int seven = 7;
197 ext4_group_t grp, primary_grp;
198 struct ext4_sb_info *sbi = EXT4_SB(sb);
201 * We can't update superblocks while the online resize is running
203 if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
204 &sbi->s_ext4_flags)) {
205 ext4_msg(sb, KERN_ERR, "Can't modify superblock while"
206 "performing online resize");
211 * We're only going to update primary superblock and two
212 * backup superblocks in this transaction.
214 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3);
215 if (IS_ERR(handle)) {
216 err = PTR_ERR(handle);
220 /* Update primary superblock */
221 err = ext4_update_primary_sb(sb, handle, func, arg);
223 ext4_msg(sb, KERN_ERR, "Failed to update primary "
228 primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr);
229 ngroups = ext4_get_groups_count(sb);
232 * Update backup superblocks. We have to start from group 0
233 * because it might not be where the primary superblock is
234 * if the fs is mounted with -o sb=<backup_sb_block>
238 while (grp < ngroups) {
239 /* Skip primary superblock */
240 if (grp == primary_grp)
243 ret = ext4_update_backup_sb(sb, handle, grp, func, arg);
245 /* Ignore bad checksum; try to update next sb */
246 if (ret == -EFSBADCRC)
253 if (handle && i > 1) {
255 * We're only journalling primary superblock and
256 * two backup superblocks; the rest is not
259 err = ext4_journal_stop(handle);
265 grp = ext4_list_backups(sb, &three, &five, &seven);
270 ret = ext4_journal_stop(handle);
275 clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags);
276 smp_mb__after_atomic();
277 return err ? err : 0;
281 * Swap memory between @a and @b for @len bytes.
283 * @a: pointer to first memory area
284 * @b: pointer to second memory area
285 * @len: number of bytes to swap
288 static void memswap(void *a, void *b, size_t len)
290 unsigned char *ap, *bp;
292 ap = (unsigned char *)a;
293 bp = (unsigned char *)b;
302 * Swap i_data and associated attributes between @inode1 and @inode2.
303 * This function is used for the primary swap between inode1 and inode2
304 * and also to revert this primary swap in case of errors.
306 * Therefore you have to make sure, that calling this method twice
307 * will revert all changes.
309 * @inode1: pointer to first inode
310 * @inode2: pointer to second inode
312 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
315 struct ext4_inode_info *ei1;
316 struct ext4_inode_info *ei2;
319 ei1 = EXT4_I(inode1);
320 ei2 = EXT4_I(inode2);
322 swap(inode1->i_version, inode2->i_version);
323 swap(inode1->i_atime, inode2->i_atime);
324 swap(inode1->i_mtime, inode2->i_mtime);
326 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
327 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
328 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
329 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
330 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
331 swap(ei1->i_disksize, ei2->i_disksize);
332 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
333 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
335 isize = i_size_read(inode1);
336 i_size_write(inode1, i_size_read(inode2));
337 i_size_write(inode2, isize);
340 void ext4_reset_inode_seed(struct inode *inode)
342 struct ext4_inode_info *ei = EXT4_I(inode);
343 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
344 __le32 inum = cpu_to_le32(inode->i_ino);
345 __le32 gen = cpu_to_le32(inode->i_generation);
348 if (!ext4_has_metadata_csum(inode->i_sb))
351 csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
352 ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
356 * Swap the information from the given @inode and the inode
357 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
358 * important fields of the inodes.
360 * @sb: the super block of the filesystem
361 * @mnt_userns: user namespace of the mount the inode was found from
362 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
365 static long swap_inode_boot_loader(struct super_block *sb,
366 struct user_namespace *mnt_userns,
371 struct inode *inode_bl;
372 struct ext4_inode_info *ei_bl;
373 qsize_t size, size_bl, diff;
375 unsigned short bytes;
377 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO,
378 EXT4_IGET_SPECIAL | EXT4_IGET_BAD);
379 if (IS_ERR(inode_bl))
380 return PTR_ERR(inode_bl);
381 ei_bl = EXT4_I(inode_bl);
383 /* Protect orig inodes against a truncate and make sure,
384 * that only 1 swap_inode_boot_loader is running. */
385 lock_two_nondirectories(inode, inode_bl);
387 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
388 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
389 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
390 ext4_has_inline_data(inode)) {
392 goto journal_err_out;
395 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
396 !inode_owner_or_capable(mnt_userns, inode) ||
397 !capable(CAP_SYS_ADMIN)) {
399 goto journal_err_out;
402 filemap_invalidate_lock(inode->i_mapping);
403 err = filemap_write_and_wait(inode->i_mapping);
407 err = filemap_write_and_wait(inode_bl->i_mapping);
411 /* Wait for all existing dio workers */
412 inode_dio_wait(inode);
413 inode_dio_wait(inode_bl);
415 truncate_inode_pages(&inode->i_data, 0);
416 truncate_inode_pages(&inode_bl->i_data, 0);
418 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
419 if (IS_ERR(handle)) {
423 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle);
425 /* Protect extent tree against block allocations via delalloc */
426 ext4_double_down_write_data_sem(inode, inode_bl);
428 if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
429 /* this inode has never been used as a BOOT_LOADER */
430 set_nlink(inode_bl, 1);
431 i_uid_write(inode_bl, 0);
432 i_gid_write(inode_bl, 0);
433 inode_bl->i_flags = 0;
435 inode_set_iversion(inode_bl, 1);
436 i_size_write(inode_bl, 0);
437 inode_bl->i_mode = S_IFREG;
438 if (ext4_has_feature_extents(sb)) {
439 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
440 ext4_ext_tree_init(handle, inode_bl);
442 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
445 err = dquot_initialize(inode);
449 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
450 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
451 diff = size - size_bl;
452 swap_inode_data(inode, inode_bl);
454 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
455 inode_inc_iversion(inode);
457 inode->i_generation = get_random_u32();
458 inode_bl->i_generation = get_random_u32();
459 ext4_reset_inode_seed(inode);
460 ext4_reset_inode_seed(inode_bl);
462 ext4_discard_preallocations(inode, 0);
464 err = ext4_mark_inode_dirty(handle, inode);
466 /* No need to update quota information. */
467 ext4_warning(inode->i_sb,
468 "couldn't mark inode #%lu dirty (err %d)",
470 /* Revert all changes: */
471 swap_inode_data(inode, inode_bl);
472 ext4_mark_inode_dirty(handle, inode);
476 blocks = inode_bl->i_blocks;
477 bytes = inode_bl->i_bytes;
478 inode_bl->i_blocks = inode->i_blocks;
479 inode_bl->i_bytes = inode->i_bytes;
480 err = ext4_mark_inode_dirty(handle, inode_bl);
482 /* No need to update quota information. */
483 ext4_warning(inode_bl->i_sb,
484 "couldn't mark inode #%lu dirty (err %d)",
485 inode_bl->i_ino, err);
489 /* Bootloader inode should not be counted into quota information. */
491 dquot_free_space(inode, diff);
493 err = dquot_alloc_space(inode, -1 * diff);
497 /* Revert all changes: */
498 inode_bl->i_blocks = blocks;
499 inode_bl->i_bytes = bytes;
500 swap_inode_data(inode, inode_bl);
501 ext4_mark_inode_dirty(handle, inode);
502 ext4_mark_inode_dirty(handle, inode_bl);
506 ext4_journal_stop(handle);
507 ext4_double_up_write_data_sem(inode, inode_bl);
510 filemap_invalidate_unlock(inode->i_mapping);
512 unlock_two_nondirectories(inode, inode_bl);
518 * If immutable is set and we are not clearing it, we're not allowed to change
519 * anything else in the inode. Don't error out if we're only trying to set
520 * immutable on an immutable file.
522 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
525 struct ext4_inode_info *ei = EXT4_I(inode);
526 unsigned int oldflags = ei->i_flags;
528 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
531 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
533 if (ext4_has_feature_project(inode->i_sb) &&
534 __kprojid_val(ei->i_projid) != new_projid)
540 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
542 struct ext4_inode_info *ei = EXT4_I(inode);
544 if (S_ISDIR(inode->i_mode))
547 if (test_opt2(inode->i_sb, DAX_NEVER) ||
548 test_opt(inode->i_sb, DAX_ALWAYS))
551 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
552 d_mark_dontcache(inode);
555 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
558 /* Allow the DAX flag to be changed on inline directories */
559 if (S_ISDIR(inode->i_mode)) {
560 flags &= ~EXT4_INLINE_DATA_FL;
561 oldflags &= ~EXT4_INLINE_DATA_FL;
564 if (flags & EXT4_DAX_FL) {
565 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
566 ext4_test_inode_state(inode,
567 EXT4_STATE_VERITY_IN_PROGRESS)) {
572 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
578 static int ext4_ioctl_setflags(struct inode *inode,
581 struct ext4_inode_info *ei = EXT4_I(inode);
582 handle_t *handle = NULL;
583 int err = -EPERM, migrate = 0;
584 struct ext4_iloc iloc;
585 unsigned int oldflags, mask, i;
586 struct super_block *sb = inode->i_sb;
588 /* Is it quota file? Do not allow user to mess with it */
589 if (ext4_is_quota_file(inode))
592 oldflags = ei->i_flags;
594 * The JOURNAL_DATA flag can only be changed by
595 * the relevant capability.
597 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
598 if (!capable(CAP_SYS_RESOURCE))
602 if (!dax_compatible(inode, oldflags, flags)) {
607 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
610 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
611 if (!ext4_has_feature_casefold(sb)) {
616 if (!S_ISDIR(inode->i_mode)) {
621 if (!ext4_empty_dir(inode)) {
628 * Wait for all pending directio and then flush all the dirty pages
629 * for this file. The flush marks all the pages readonly, so any
630 * subsequent attempt to write to the file (particularly mmap pages)
631 * will come through the filesystem and fail.
633 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
634 (flags & EXT4_IMMUTABLE_FL)) {
635 inode_dio_wait(inode);
636 err = filemap_write_and_wait(inode->i_mapping);
641 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
642 if (IS_ERR(handle)) {
643 err = PTR_ERR(handle);
647 ext4_handle_sync(handle);
648 err = ext4_reserve_inode_write(handle, inode, &iloc);
652 ext4_dax_dontcache(inode, flags);
654 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
655 if (!(mask & EXT4_FL_USER_MODIFIABLE))
657 /* These flags get special treatment later */
658 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
661 ext4_set_inode_flag(inode, i);
663 ext4_clear_inode_flag(inode, i);
666 ext4_set_inode_flags(inode, false);
668 inode->i_ctime = current_time(inode);
669 inode_inc_iversion(inode);
671 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
673 ext4_journal_stop(handle);
677 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
679 * Changes to the journaling mode can cause unsafe changes to
680 * S_DAX if the inode is DAX
687 err = ext4_change_inode_journal_flag(inode,
688 flags & EXT4_JOURNAL_DATA_FL);
693 if (flags & EXT4_EXTENTS_FL)
694 err = ext4_ext_migrate(inode);
696 err = ext4_ind_migrate(inode);
704 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
706 struct super_block *sb = inode->i_sb;
707 struct ext4_inode_info *ei = EXT4_I(inode);
711 struct ext4_iloc iloc;
712 struct ext4_inode *raw_inode;
713 struct dquot *transfer_to[MAXQUOTAS] = { };
715 if (!ext4_has_feature_project(sb)) {
716 if (projid != EXT4_DEF_PROJID)
722 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
725 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
727 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
731 /* Is it quota file? Do not allow user to mess with it */
732 if (ext4_is_quota_file(inode))
735 err = ext4_get_inode_loc(inode, &iloc);
739 raw_inode = ext4_raw_inode(&iloc);
740 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
741 err = ext4_expand_extra_isize(inode,
742 EXT4_SB(sb)->s_want_extra_isize,
750 err = dquot_initialize(inode);
754 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
755 EXT4_QUOTA_INIT_BLOCKS(sb) +
756 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
758 return PTR_ERR(handle);
760 err = ext4_reserve_inode_write(handle, inode, &iloc);
764 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
765 if (!IS_ERR(transfer_to[PRJQUOTA])) {
767 /* __dquot_transfer() calls back ext4_get_inode_usage() which
768 * counts xattr inode references.
770 down_read(&EXT4_I(inode)->xattr_sem);
771 err = __dquot_transfer(inode, transfer_to);
772 up_read(&EXT4_I(inode)->xattr_sem);
773 dqput(transfer_to[PRJQUOTA]);
778 EXT4_I(inode)->i_projid = kprojid;
779 inode->i_ctime = current_time(inode);
780 inode_inc_iversion(inode);
782 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
786 ext4_journal_stop(handle);
790 static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
792 if (projid != EXT4_DEF_PROJID)
798 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
800 struct ext4_sb_info *sbi = EXT4_SB(sb);
803 if (!capable(CAP_SYS_ADMIN))
806 if (get_user(flags, (__u32 __user *)arg))
809 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
812 if (ext4_forced_shutdown(sbi))
815 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
816 trace_ext4_shutdown(sb, flags);
819 case EXT4_GOING_FLAGS_DEFAULT:
820 freeze_bdev(sb->s_bdev);
821 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
822 thaw_bdev(sb->s_bdev);
824 case EXT4_GOING_FLAGS_LOGFLUSH:
825 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
826 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
827 (void) ext4_force_commit(sb);
828 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
831 case EXT4_GOING_FLAGS_NOLOGFLUSH:
832 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
833 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
834 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
839 clear_opt(sb, DISCARD);
843 struct getfsmap_info {
844 struct super_block *gi_sb;
845 struct fsmap_head __user *gi_data;
850 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
852 struct getfsmap_info *info = priv;
855 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
857 info->gi_last_flags = xfm->fmr_flags;
858 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
859 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
860 sizeof(struct fsmap)))
866 static int ext4_ioc_getfsmap(struct super_block *sb,
867 struct fsmap_head __user *arg)
869 struct getfsmap_info info = { NULL };
870 struct ext4_fsmap_head xhead = {0};
871 struct fsmap_head head;
872 bool aborted = false;
875 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
877 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
878 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
879 sizeof(head.fmh_keys[0].fmr_reserved)) ||
880 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
881 sizeof(head.fmh_keys[1].fmr_reserved)))
884 * ext4 doesn't report file extents at all, so the only valid
885 * file offsets are the magic ones (all zeroes or all ones).
887 if (head.fmh_keys[0].fmr_offset ||
888 (head.fmh_keys[1].fmr_offset != 0 &&
889 head.fmh_keys[1].fmr_offset != -1ULL))
892 xhead.fmh_iflags = head.fmh_iflags;
893 xhead.fmh_count = head.fmh_count;
894 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
895 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
897 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
898 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
902 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
903 if (error == EXT4_QUERY_RANGE_ABORT)
908 /* If we didn't abort, set the "last" flag in the last fmx */
909 if (!aborted && info.gi_idx) {
910 info.gi_last_flags |= FMR_OF_LAST;
911 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
913 sizeof(info.gi_last_flags)))
917 /* copy back header */
918 head.fmh_entries = xhead.fmh_entries;
919 head.fmh_oflags = xhead.fmh_oflags;
920 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
926 static long ext4_ioctl_group_add(struct file *file,
927 struct ext4_new_group_data *input)
929 struct super_block *sb = file_inode(file)->i_sb;
932 err = ext4_resize_begin(sb);
936 if (ext4_has_feature_bigalloc(sb)) {
937 ext4_msg(sb, KERN_ERR,
938 "Online resizing not supported with bigalloc");
943 err = mnt_want_write_file(file);
947 err = ext4_group_add(sb, input);
948 if (EXT4_SB(sb)->s_journal) {
949 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
950 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
951 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
955 mnt_drop_write_file(file);
956 if (!err && ext4_has_group_desc_csum(sb) &&
957 test_opt(sb, INIT_INODE_TABLE))
958 err = ext4_register_li_request(sb, input->group);
960 err2 = ext4_resize_end(sb, false);
966 int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
968 struct inode *inode = d_inode(dentry);
969 struct ext4_inode_info *ei = EXT4_I(inode);
970 u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
972 if (S_ISREG(inode->i_mode))
973 flags &= ~FS_PROJINHERIT_FL;
975 fileattr_fill_flags(fa, flags);
976 if (ext4_has_feature_project(inode->i_sb))
977 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
982 int ext4_fileattr_set(struct user_namespace *mnt_userns,
983 struct dentry *dentry, struct fileattr *fa)
985 struct inode *inode = d_inode(dentry);
986 u32 flags = fa->flags;
987 int err = -EOPNOTSUPP;
989 if (flags & ~EXT4_FL_USER_VISIBLE)
993 * chattr(1) grabs flags via GETFLAGS, modifies the result and
994 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
995 * more restrictive than just silently masking off visible but
996 * not settable flags as we always did.
998 flags &= EXT4_FL_USER_MODIFIABLE;
999 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1001 err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
1004 err = ext4_ioctl_setflags(inode, flags);
1007 err = ext4_ioctl_setproject(inode, fa->fsx_projid);
1012 /* So that the fiemap access checks can't overflow on 32 bit machines. */
1013 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
1015 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
1017 struct fiemap fiemap;
1018 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
1019 struct fiemap_extent_info fieinfo = { 0, };
1020 struct inode *inode = file_inode(filp);
1023 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
1026 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
1029 fieinfo.fi_flags = fiemap.fm_flags;
1030 fieinfo.fi_extents_max = fiemap.fm_extent_count;
1031 fieinfo.fi_extents_start = ufiemap->fm_extents;
1033 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
1035 fiemap.fm_flags = fieinfo.fi_flags;
1036 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
1037 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
1043 static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
1047 unsigned int flush_flags = 0;
1048 struct super_block *sb = file_inode(filp)->i_sb;
1050 if (copy_from_user(&flags, (__u32 __user *)arg,
1054 if (!capable(CAP_SYS_ADMIN))
1057 /* check for invalid bits set */
1058 if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
1059 ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
1060 (flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
1063 if (!EXT4_SB(sb)->s_journal)
1066 if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
1067 !bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev))
1070 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
1073 if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
1074 flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
1076 if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
1077 flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
1078 pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
1081 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1082 err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
1083 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1088 static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label)
1092 char new_label[EXT4_LABEL_MAX + 1];
1093 struct super_block *sb = file_inode(filp)->i_sb;
1095 if (!capable(CAP_SYS_ADMIN))
1099 * Copy the maximum length allowed for ext4 label with one more to
1100 * find the required terminating null byte in order to test the
1101 * label length. The on disk label doesn't need to be null terminated.
1103 if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1))
1106 len = strnlen(new_label, EXT4_LABEL_MAX + 1);
1107 if (len > EXT4_LABEL_MAX)
1111 * Clear the buffer after the new label
1113 memset(new_label + len, 0, EXT4_LABEL_MAX - len);
1115 ret = mnt_want_write_file(filp);
1119 ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label);
1121 mnt_drop_write_file(filp);
1125 static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label)
1127 char label[EXT4_LABEL_MAX + 1];
1130 * EXT4_LABEL_MAX must always be smaller than FSLABEL_MAX because
1131 * FSLABEL_MAX must include terminating null byte, while s_volume_name
1134 BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX);
1136 memset(label, 0, sizeof(label));
1137 lock_buffer(sbi->s_sbh);
1138 strncpy(label, sbi->s_es->s_volume_name, EXT4_LABEL_MAX);
1139 unlock_buffer(sbi->s_sbh);
1141 if (copy_to_user(user_label, label, sizeof(label)))
1146 static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi,
1147 struct fsuuid __user *ufsuuid)
1149 struct fsuuid fsuuid;
1150 __u8 uuid[UUID_SIZE];
1152 if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
1155 if (fsuuid.fsu_len == 0) {
1156 fsuuid.fsu_len = UUID_SIZE;
1157 if (copy_to_user(&ufsuuid->fsu_len, &fsuuid.fsu_len,
1158 sizeof(fsuuid.fsu_len)))
1163 if (fsuuid.fsu_len < UUID_SIZE || fsuuid.fsu_flags != 0)
1166 lock_buffer(sbi->s_sbh);
1167 memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE);
1168 unlock_buffer(sbi->s_sbh);
1170 fsuuid.fsu_len = UUID_SIZE;
1171 if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid)) ||
1172 copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE))
1177 static int ext4_ioctl_setuuid(struct file *filp,
1178 const struct fsuuid __user *ufsuuid)
1181 struct super_block *sb = file_inode(filp)->i_sb;
1182 struct fsuuid fsuuid;
1183 __u8 uuid[UUID_SIZE];
1185 if (!capable(CAP_SYS_ADMIN))
1189 * If any checksums (group descriptors or metadata) are being used
1190 * then the checksum seed feature is required to change the UUID.
1192 if (((ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb))
1193 && !ext4_has_feature_csum_seed(sb))
1194 || ext4_has_feature_stable_inodes(sb))
1197 if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
1200 if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0)
1203 if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE))
1206 ret = mnt_want_write_file(filp);
1210 ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid);
1211 mnt_drop_write_file(filp);
1216 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1218 struct inode *inode = file_inode(filp);
1219 struct super_block *sb = inode->i_sb;
1220 struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
1222 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
1225 case FS_IOC_GETFSMAP:
1226 return ext4_ioc_getfsmap(sb, (void __user *)arg);
1227 case EXT4_IOC_GETVERSION:
1228 case EXT4_IOC_GETVERSION_OLD:
1229 return put_user(inode->i_generation, (int __user *) arg);
1230 case EXT4_IOC_SETVERSION:
1231 case EXT4_IOC_SETVERSION_OLD: {
1233 struct ext4_iloc iloc;
1237 if (!inode_owner_or_capable(mnt_userns, inode))
1240 if (ext4_has_metadata_csum(inode->i_sb)) {
1241 ext4_warning(sb, "Setting inode version is not "
1242 "supported with metadata_csum enabled.");
1246 err = mnt_want_write_file(filp);
1249 if (get_user(generation, (int __user *) arg)) {
1251 goto setversion_out;
1255 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
1256 if (IS_ERR(handle)) {
1257 err = PTR_ERR(handle);
1260 err = ext4_reserve_inode_write(handle, inode, &iloc);
1262 inode->i_ctime = current_time(inode);
1263 inode_inc_iversion(inode);
1264 inode->i_generation = generation;
1265 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
1267 ext4_journal_stop(handle);
1270 inode_unlock(inode);
1272 mnt_drop_write_file(filp);
1275 case EXT4_IOC_GROUP_EXTEND: {
1276 ext4_fsblk_t n_blocks_count;
1279 err = ext4_resize_begin(sb);
1283 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
1285 goto group_extend_out;
1288 if (ext4_has_feature_bigalloc(sb)) {
1289 ext4_msg(sb, KERN_ERR,
1290 "Online resizing not supported with bigalloc");
1292 goto group_extend_out;
1295 err = mnt_want_write_file(filp);
1297 goto group_extend_out;
1299 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
1300 if (EXT4_SB(sb)->s_journal) {
1301 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1302 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1303 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1307 mnt_drop_write_file(filp);
1309 err2 = ext4_resize_end(sb, false);
1315 case EXT4_IOC_MOVE_EXT: {
1316 struct move_extent me;
1320 if (!(filp->f_mode & FMODE_READ) ||
1321 !(filp->f_mode & FMODE_WRITE))
1324 if (copy_from_user(&me,
1325 (struct move_extent __user *)arg, sizeof(me)))
1329 donor = fdget(me.donor_fd);
1333 if (!(donor.file->f_mode & FMODE_WRITE)) {
1338 if (ext4_has_feature_bigalloc(sb)) {
1339 ext4_msg(sb, KERN_ERR,
1340 "Online defrag not supported with bigalloc");
1343 } else if (IS_DAX(inode)) {
1344 ext4_msg(sb, KERN_ERR,
1345 "Online defrag not supported with DAX");
1350 err = mnt_want_write_file(filp);
1354 err = ext4_move_extents(filp, donor.file, me.orig_start,
1355 me.donor_start, me.len, &me.moved_len);
1356 mnt_drop_write_file(filp);
1358 if (copy_to_user((struct move_extent __user *)arg,
1366 case EXT4_IOC_GROUP_ADD: {
1367 struct ext4_new_group_data input;
1369 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1373 return ext4_ioctl_group_add(filp, &input);
1376 case EXT4_IOC_MIGRATE:
1379 if (!inode_owner_or_capable(mnt_userns, inode))
1382 err = mnt_want_write_file(filp);
1386 * inode_mutex prevent write and truncate on the file.
1387 * Read still goes through. We take i_data_sem in
1388 * ext4_ext_swap_inode_data before we switch the
1389 * inode format to prevent read.
1391 inode_lock((inode));
1392 err = ext4_ext_migrate(inode);
1393 inode_unlock((inode));
1394 mnt_drop_write_file(filp);
1398 case EXT4_IOC_ALLOC_DA_BLKS:
1401 if (!inode_owner_or_capable(mnt_userns, inode))
1404 err = mnt_want_write_file(filp);
1407 err = ext4_alloc_da_blocks(inode);
1408 mnt_drop_write_file(filp);
1412 case EXT4_IOC_SWAP_BOOT:
1415 if (!(filp->f_mode & FMODE_WRITE))
1417 err = mnt_want_write_file(filp);
1420 err = swap_inode_boot_loader(sb, mnt_userns, inode);
1421 mnt_drop_write_file(filp);
1425 case EXT4_IOC_RESIZE_FS: {
1426 ext4_fsblk_t n_blocks_count;
1427 int err = 0, err2 = 0;
1428 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1430 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1435 err = ext4_resize_begin(sb);
1439 err = mnt_want_write_file(filp);
1443 err = ext4_resize_fs(sb, n_blocks_count);
1444 if (EXT4_SB(sb)->s_journal) {
1445 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL);
1446 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1447 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
1448 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1452 mnt_drop_write_file(filp);
1453 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1454 ext4_has_group_desc_csum(sb) &&
1455 test_opt(sb, INIT_INODE_TABLE))
1456 err = ext4_register_li_request(sb, o_group);
1459 err2 = ext4_resize_end(sb, true);
1467 struct fstrim_range range;
1470 if (!capable(CAP_SYS_ADMIN))
1473 if (!bdev_max_discard_sectors(sb->s_bdev))
1477 * We haven't replayed the journal, so we cannot use our
1478 * block-bitmap-guided storage zapping commands.
1480 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1483 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1487 ret = ext4_trim_fs(sb, &range);
1491 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1497 case EXT4_IOC_PRECACHE_EXTENTS:
1498 return ext4_ext_precache(inode);
1500 case FS_IOC_SET_ENCRYPTION_POLICY:
1501 if (!ext4_has_feature_encrypt(sb))
1503 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1505 case FS_IOC_GET_ENCRYPTION_PWSALT:
1506 return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg);
1508 case FS_IOC_GET_ENCRYPTION_POLICY:
1509 if (!ext4_has_feature_encrypt(sb))
1511 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1513 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1514 if (!ext4_has_feature_encrypt(sb))
1516 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1518 case FS_IOC_ADD_ENCRYPTION_KEY:
1519 if (!ext4_has_feature_encrypt(sb))
1521 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1523 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1524 if (!ext4_has_feature_encrypt(sb))
1526 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1528 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1529 if (!ext4_has_feature_encrypt(sb))
1531 return fscrypt_ioctl_remove_key_all_users(filp,
1532 (void __user *)arg);
1533 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1534 if (!ext4_has_feature_encrypt(sb))
1536 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1538 case FS_IOC_GET_ENCRYPTION_NONCE:
1539 if (!ext4_has_feature_encrypt(sb))
1541 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1543 case EXT4_IOC_CLEAR_ES_CACHE:
1545 if (!inode_owner_or_capable(mnt_userns, inode))
1547 ext4_clear_inode_es(inode);
1551 case EXT4_IOC_GETSTATE:
1555 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1556 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1557 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1558 state |= EXT4_STATE_FLAG_NEW;
1559 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1560 state |= EXT4_STATE_FLAG_NEWENTRY;
1561 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1562 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1564 return put_user(state, (__u32 __user *) arg);
1567 case EXT4_IOC_GET_ES_CACHE:
1568 return ext4_ioctl_get_es_cache(filp, arg);
1570 case EXT4_IOC_SHUTDOWN:
1571 return ext4_shutdown(sb, arg);
1573 case FS_IOC_ENABLE_VERITY:
1574 if (!ext4_has_feature_verity(sb))
1576 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1578 case FS_IOC_MEASURE_VERITY:
1579 if (!ext4_has_feature_verity(sb))
1581 return fsverity_ioctl_measure(filp, (void __user *)arg);
1583 case FS_IOC_READ_VERITY_METADATA:
1584 if (!ext4_has_feature_verity(sb))
1586 return fsverity_ioctl_read_metadata(filp,
1587 (const void __user *)arg);
1589 case EXT4_IOC_CHECKPOINT:
1590 return ext4_ioctl_checkpoint(filp, arg);
1592 case FS_IOC_GETFSLABEL:
1593 return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg);
1595 case FS_IOC_SETFSLABEL:
1596 return ext4_ioctl_setlabel(filp,
1597 (const void __user *)arg);
1599 case EXT4_IOC_GETFSUUID:
1600 return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg);
1601 case EXT4_IOC_SETFSUUID:
1602 return ext4_ioctl_setuuid(filp, (const void __user *)arg);
1608 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1610 return __ext4_ioctl(filp, cmd, arg);
1613 #ifdef CONFIG_COMPAT
1614 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1616 /* These are just misnamed, they actually get/put from/to user an int */
1618 case EXT4_IOC32_GETVERSION:
1619 cmd = EXT4_IOC_GETVERSION;
1621 case EXT4_IOC32_SETVERSION:
1622 cmd = EXT4_IOC_SETVERSION;
1624 case EXT4_IOC32_GROUP_EXTEND:
1625 cmd = EXT4_IOC_GROUP_EXTEND;
1627 case EXT4_IOC32_GETVERSION_OLD:
1628 cmd = EXT4_IOC_GETVERSION_OLD;
1630 case EXT4_IOC32_SETVERSION_OLD:
1631 cmd = EXT4_IOC_SETVERSION_OLD;
1633 case EXT4_IOC32_GETRSVSZ:
1634 cmd = EXT4_IOC_GETRSVSZ;
1636 case EXT4_IOC32_SETRSVSZ:
1637 cmd = EXT4_IOC_SETRSVSZ;
1639 case EXT4_IOC32_GROUP_ADD: {
1640 struct compat_ext4_new_group_input __user *uinput;
1641 struct ext4_new_group_data input;
1644 uinput = compat_ptr(arg);
1645 err = get_user(input.group, &uinput->group);
1646 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1647 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1648 err |= get_user(input.inode_table, &uinput->inode_table);
1649 err |= get_user(input.blocks_count, &uinput->blocks_count);
1650 err |= get_user(input.reserved_blocks,
1651 &uinput->reserved_blocks);
1654 return ext4_ioctl_group_add(file, &input);
1656 case EXT4_IOC_MOVE_EXT:
1657 case EXT4_IOC_RESIZE_FS:
1659 case EXT4_IOC_PRECACHE_EXTENTS:
1660 case FS_IOC_SET_ENCRYPTION_POLICY:
1661 case FS_IOC_GET_ENCRYPTION_PWSALT:
1662 case FS_IOC_GET_ENCRYPTION_POLICY:
1663 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1664 case FS_IOC_ADD_ENCRYPTION_KEY:
1665 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1666 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1667 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1668 case FS_IOC_GET_ENCRYPTION_NONCE:
1669 case EXT4_IOC_SHUTDOWN:
1670 case FS_IOC_GETFSMAP:
1671 case FS_IOC_ENABLE_VERITY:
1672 case FS_IOC_MEASURE_VERITY:
1673 case FS_IOC_READ_VERITY_METADATA:
1674 case EXT4_IOC_CLEAR_ES_CACHE:
1675 case EXT4_IOC_GETSTATE:
1676 case EXT4_IOC_GET_ES_CACHE:
1677 case EXT4_IOC_CHECKPOINT:
1678 case FS_IOC_GETFSLABEL:
1679 case FS_IOC_SETFSLABEL:
1680 case EXT4_IOC_GETFSUUID:
1681 case EXT4_IOC_SETFSUUID:
1684 return -ENOIOCTLCMD;
1686 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1690 static void set_overhead(struct ext4_super_block *es, const void *arg)
1692 es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg));
1695 int ext4_update_overhead(struct super_block *sb, bool force)
1697 struct ext4_sb_info *sbi = EXT4_SB(sb);
1702 (sbi->s_overhead == 0 ||
1703 sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters)))
1705 return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead);