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/uuid.h>
20 #include <linux/uaccess.h>
21 #include <linux/delay.h>
22 #include <linux/iversion.h>
23 #include "ext4_jbd2.h"
25 #include <linux/fsmap.h>
27 #include <trace/events/ext4.h>
30 * Swap memory between @a and @b for @len bytes.
32 * @a: pointer to first memory area
33 * @b: pointer to second memory area
34 * @len: number of bytes to swap
37 static void memswap(void *a, void *b, size_t len)
39 unsigned char *ap, *bp;
41 ap = (unsigned char *)a;
42 bp = (unsigned char *)b;
51 * Swap i_data and associated attributes between @inode1 and @inode2.
52 * This function is used for the primary swap between inode1 and inode2
53 * and also to revert this primary swap in case of errors.
55 * Therefore you have to make sure, that calling this method twice
56 * will revert all changes.
58 * @inode1: pointer to first inode
59 * @inode2: pointer to second inode
61 static void swap_inode_data(struct inode *inode1, struct inode *inode2)
64 struct ext4_inode_info *ei1;
65 struct ext4_inode_info *ei2;
71 swap(inode1->i_version, inode2->i_version);
72 swap(inode1->i_atime, inode2->i_atime);
73 swap(inode1->i_mtime, inode2->i_mtime);
75 memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
76 tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
77 ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
78 (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
79 ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
80 swap(ei1->i_disksize, ei2->i_disksize);
81 ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
82 ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
84 isize = i_size_read(inode1);
85 i_size_write(inode1, i_size_read(inode2));
86 i_size_write(inode2, isize);
89 void ext4_reset_inode_seed(struct inode *inode)
91 struct ext4_inode_info *ei = EXT4_I(inode);
92 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
93 __le32 inum = cpu_to_le32(inode->i_ino);
94 __le32 gen = cpu_to_le32(inode->i_generation);
97 if (!ext4_has_metadata_csum(inode->i_sb))
100 csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
101 ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
105 * Swap the information from the given @inode and the inode
106 * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
107 * important fields of the inodes.
109 * @sb: the super block of the filesystem
110 * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
113 static long swap_inode_boot_loader(struct super_block *sb,
118 struct inode *inode_bl;
119 struct ext4_inode_info *ei_bl;
120 qsize_t size, size_bl, diff;
122 unsigned short bytes;
124 inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
125 if (IS_ERR(inode_bl))
126 return PTR_ERR(inode_bl);
127 ei_bl = EXT4_I(inode_bl);
129 /* Protect orig inodes against a truncate and make sure,
130 * that only 1 swap_inode_boot_loader is running. */
131 lock_two_nondirectories(inode, inode_bl);
133 if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
134 IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
135 (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
136 ext4_has_inline_data(inode)) {
138 goto journal_err_out;
141 if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
142 !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
144 goto journal_err_out;
147 down_write(&EXT4_I(inode)->i_mmap_sem);
148 err = filemap_write_and_wait(inode->i_mapping);
152 err = filemap_write_and_wait(inode_bl->i_mapping);
156 /* Wait for all existing dio workers */
157 inode_dio_wait(inode);
158 inode_dio_wait(inode_bl);
160 truncate_inode_pages(&inode->i_data, 0);
161 truncate_inode_pages(&inode_bl->i_data, 0);
163 handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
164 if (IS_ERR(handle)) {
168 ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
170 /* Protect extent tree against block allocations via delalloc */
171 ext4_double_down_write_data_sem(inode, inode_bl);
173 if (inode_bl->i_nlink == 0) {
174 /* this inode has never been used as a BOOT_LOADER */
175 set_nlink(inode_bl, 1);
176 i_uid_write(inode_bl, 0);
177 i_gid_write(inode_bl, 0);
178 inode_bl->i_flags = 0;
180 inode_set_iversion(inode_bl, 1);
181 i_size_write(inode_bl, 0);
182 inode_bl->i_mode = S_IFREG;
183 if (ext4_has_feature_extents(sb)) {
184 ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
185 ext4_ext_tree_init(handle, inode_bl);
187 memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
190 err = dquot_initialize(inode);
194 size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
195 size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
196 diff = size - size_bl;
197 swap_inode_data(inode, inode_bl);
199 inode->i_ctime = inode_bl->i_ctime = current_time(inode);
201 inode->i_generation = prandom_u32();
202 inode_bl->i_generation = prandom_u32();
203 ext4_reset_inode_seed(inode);
204 ext4_reset_inode_seed(inode_bl);
206 ext4_discard_preallocations(inode, 0);
208 err = ext4_mark_inode_dirty(handle, inode);
210 /* No need to update quota information. */
211 ext4_warning(inode->i_sb,
212 "couldn't mark inode #%lu dirty (err %d)",
214 /* Revert all changes: */
215 swap_inode_data(inode, inode_bl);
216 ext4_mark_inode_dirty(handle, inode);
220 blocks = inode_bl->i_blocks;
221 bytes = inode_bl->i_bytes;
222 inode_bl->i_blocks = inode->i_blocks;
223 inode_bl->i_bytes = inode->i_bytes;
224 err = ext4_mark_inode_dirty(handle, inode_bl);
226 /* No need to update quota information. */
227 ext4_warning(inode_bl->i_sb,
228 "couldn't mark inode #%lu dirty (err %d)",
229 inode_bl->i_ino, err);
233 /* Bootloader inode should not be counted into quota information. */
235 dquot_free_space(inode, diff);
237 err = dquot_alloc_space(inode, -1 * diff);
241 /* Revert all changes: */
242 inode_bl->i_blocks = blocks;
243 inode_bl->i_bytes = bytes;
244 swap_inode_data(inode, inode_bl);
245 ext4_mark_inode_dirty(handle, inode);
246 ext4_mark_inode_dirty(handle, inode_bl);
250 ext4_journal_stop(handle);
251 ext4_fc_stop_ineligible(sb);
252 ext4_double_up_write_data_sem(inode, inode_bl);
255 up_write(&EXT4_I(inode)->i_mmap_sem);
257 unlock_two_nondirectories(inode, inode_bl);
262 #ifdef CONFIG_FS_ENCRYPTION
263 static int uuid_is_zero(__u8 u[16])
267 for (i = 0; i < 16; i++)
275 * If immutable is set and we are not clearing it, we're not allowed to change
276 * anything else in the inode. Don't error out if we're only trying to set
277 * immutable on an immutable file.
279 static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
282 struct ext4_inode_info *ei = EXT4_I(inode);
283 unsigned int oldflags = ei->i_flags;
285 if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
288 if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
290 if (ext4_has_feature_project(inode->i_sb) &&
291 __kprojid_val(ei->i_projid) != new_projid)
297 static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
299 struct ext4_inode_info *ei = EXT4_I(inode);
301 if (S_ISDIR(inode->i_mode))
304 if (test_opt2(inode->i_sb, DAX_NEVER) ||
305 test_opt(inode->i_sb, DAX_ALWAYS))
308 if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
309 d_mark_dontcache(inode);
312 static bool dax_compatible(struct inode *inode, unsigned int oldflags,
315 if (flags & EXT4_DAX_FL) {
316 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
317 ext4_test_inode_state(inode,
318 EXT4_STATE_VERITY_IN_PROGRESS)) {
323 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
329 static int ext4_ioctl_setflags(struct inode *inode,
332 struct ext4_inode_info *ei = EXT4_I(inode);
333 handle_t *handle = NULL;
334 int err = -EPERM, migrate = 0;
335 struct ext4_iloc iloc;
336 unsigned int oldflags, mask, i;
337 struct super_block *sb = inode->i_sb;
339 /* Is it quota file? Do not allow user to mess with it */
340 if (ext4_is_quota_file(inode))
343 oldflags = ei->i_flags;
345 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
350 * The JOURNAL_DATA flag can only be changed by
351 * the relevant capability.
353 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
354 if (!capable(CAP_SYS_RESOURCE))
358 if (!dax_compatible(inode, oldflags, flags)) {
363 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
366 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
367 if (!ext4_has_feature_casefold(sb)) {
372 if (!S_ISDIR(inode->i_mode)) {
377 if (!ext4_empty_dir(inode)) {
384 * Wait for all pending directio and then flush all the dirty pages
385 * for this file. The flush marks all the pages readonly, so any
386 * subsequent attempt to write to the file (particularly mmap pages)
387 * will come through the filesystem and fail.
389 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
390 (flags & EXT4_IMMUTABLE_FL)) {
391 inode_dio_wait(inode);
392 err = filemap_write_and_wait(inode->i_mapping);
397 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
398 if (IS_ERR(handle)) {
399 err = PTR_ERR(handle);
403 ext4_handle_sync(handle);
404 err = ext4_reserve_inode_write(handle, inode, &iloc);
408 ext4_dax_dontcache(inode, flags);
410 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
411 if (!(mask & EXT4_FL_USER_MODIFIABLE))
413 /* These flags get special treatment later */
414 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
417 ext4_set_inode_flag(inode, i);
419 ext4_clear_inode_flag(inode, i);
422 ext4_set_inode_flags(inode, false);
424 inode->i_ctime = current_time(inode);
426 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
428 ext4_journal_stop(handle);
432 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
434 * Changes to the journaling mode can cause unsafe changes to
435 * S_DAX if the inode is DAX
442 err = ext4_change_inode_journal_flag(inode,
443 flags & EXT4_JOURNAL_DATA_FL);
448 if (flags & EXT4_EXTENTS_FL)
449 err = ext4_ext_migrate(inode);
451 err = ext4_ind_migrate(inode);
459 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
461 struct inode *inode = file_inode(filp);
462 struct super_block *sb = inode->i_sb;
463 struct ext4_inode_info *ei = EXT4_I(inode);
467 struct ext4_iloc iloc;
468 struct ext4_inode *raw_inode;
469 struct dquot *transfer_to[MAXQUOTAS] = { };
471 if (!ext4_has_feature_project(sb)) {
472 if (projid != EXT4_DEF_PROJID)
478 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
481 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
483 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
487 /* Is it quota file? Do not allow user to mess with it */
488 if (ext4_is_quota_file(inode))
491 err = ext4_get_inode_loc(inode, &iloc);
495 raw_inode = ext4_raw_inode(&iloc);
496 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
497 err = ext4_expand_extra_isize(inode,
498 EXT4_SB(sb)->s_want_extra_isize,
506 err = dquot_initialize(inode);
510 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
511 EXT4_QUOTA_INIT_BLOCKS(sb) +
512 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
514 return PTR_ERR(handle);
516 err = ext4_reserve_inode_write(handle, inode, &iloc);
520 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
521 if (!IS_ERR(transfer_to[PRJQUOTA])) {
523 /* __dquot_transfer() calls back ext4_get_inode_usage() which
524 * counts xattr inode references.
526 down_read(&EXT4_I(inode)->xattr_sem);
527 err = __dquot_transfer(inode, transfer_to);
528 up_read(&EXT4_I(inode)->xattr_sem);
529 dqput(transfer_to[PRJQUOTA]);
534 EXT4_I(inode)->i_projid = kprojid;
535 inode->i_ctime = current_time(inode);
537 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
541 ext4_journal_stop(handle);
545 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
547 if (projid != EXT4_DEF_PROJID)
553 /* Transfer internal flags to xflags */
554 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
558 if (iflags & EXT4_SYNC_FL)
559 xflags |= FS_XFLAG_SYNC;
560 if (iflags & EXT4_IMMUTABLE_FL)
561 xflags |= FS_XFLAG_IMMUTABLE;
562 if (iflags & EXT4_APPEND_FL)
563 xflags |= FS_XFLAG_APPEND;
564 if (iflags & EXT4_NODUMP_FL)
565 xflags |= FS_XFLAG_NODUMP;
566 if (iflags & EXT4_NOATIME_FL)
567 xflags |= FS_XFLAG_NOATIME;
568 if (iflags & EXT4_PROJINHERIT_FL)
569 xflags |= FS_XFLAG_PROJINHERIT;
570 if (iflags & EXT4_DAX_FL)
571 xflags |= FS_XFLAG_DAX;
575 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
576 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
577 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
580 /* Transfer xflags flags to internal */
581 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
583 unsigned long iflags = 0;
585 if (xflags & FS_XFLAG_SYNC)
586 iflags |= EXT4_SYNC_FL;
587 if (xflags & FS_XFLAG_IMMUTABLE)
588 iflags |= EXT4_IMMUTABLE_FL;
589 if (xflags & FS_XFLAG_APPEND)
590 iflags |= EXT4_APPEND_FL;
591 if (xflags & FS_XFLAG_NODUMP)
592 iflags |= EXT4_NODUMP_FL;
593 if (xflags & FS_XFLAG_NOATIME)
594 iflags |= EXT4_NOATIME_FL;
595 if (xflags & FS_XFLAG_PROJINHERIT)
596 iflags |= EXT4_PROJINHERIT_FL;
597 if (xflags & FS_XFLAG_DAX)
598 iflags |= EXT4_DAX_FL;
603 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
605 struct ext4_sb_info *sbi = EXT4_SB(sb);
608 if (!capable(CAP_SYS_ADMIN))
611 if (get_user(flags, (__u32 __user *)arg))
614 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
617 if (ext4_forced_shutdown(sbi))
620 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
621 trace_ext4_shutdown(sb, flags);
624 case EXT4_GOING_FLAGS_DEFAULT:
625 freeze_bdev(sb->s_bdev);
626 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
627 thaw_bdev(sb->s_bdev, sb);
629 case EXT4_GOING_FLAGS_LOGFLUSH:
630 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
631 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
632 (void) ext4_force_commit(sb);
633 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
636 case EXT4_GOING_FLAGS_NOLOGFLUSH:
637 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
638 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
639 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
644 clear_opt(sb, DISCARD);
648 struct getfsmap_info {
649 struct super_block *gi_sb;
650 struct fsmap_head __user *gi_data;
655 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
657 struct getfsmap_info *info = priv;
660 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
662 info->gi_last_flags = xfm->fmr_flags;
663 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
664 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
665 sizeof(struct fsmap)))
671 static int ext4_ioc_getfsmap(struct super_block *sb,
672 struct fsmap_head __user *arg)
674 struct getfsmap_info info = { NULL };
675 struct ext4_fsmap_head xhead = {0};
676 struct fsmap_head head;
677 bool aborted = false;
680 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
682 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
683 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
684 sizeof(head.fmh_keys[0].fmr_reserved)) ||
685 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
686 sizeof(head.fmh_keys[1].fmr_reserved)))
689 * ext4 doesn't report file extents at all, so the only valid
690 * file offsets are the magic ones (all zeroes or all ones).
692 if (head.fmh_keys[0].fmr_offset ||
693 (head.fmh_keys[1].fmr_offset != 0 &&
694 head.fmh_keys[1].fmr_offset != -1ULL))
697 xhead.fmh_iflags = head.fmh_iflags;
698 xhead.fmh_count = head.fmh_count;
699 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
700 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
702 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
703 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
707 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
708 if (error == EXT4_QUERY_RANGE_ABORT) {
714 /* If we didn't abort, set the "last" flag in the last fmx */
715 if (!aborted && info.gi_idx) {
716 info.gi_last_flags |= FMR_OF_LAST;
717 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
719 sizeof(info.gi_last_flags)))
723 /* copy back header */
724 head.fmh_entries = xhead.fmh_entries;
725 head.fmh_oflags = xhead.fmh_oflags;
726 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
732 static long ext4_ioctl_group_add(struct file *file,
733 struct ext4_new_group_data *input)
735 struct super_block *sb = file_inode(file)->i_sb;
738 err = ext4_resize_begin(sb);
742 if (ext4_has_feature_bigalloc(sb)) {
743 ext4_msg(sb, KERN_ERR,
744 "Online resizing not supported with bigalloc");
749 err = mnt_want_write_file(file);
753 err = ext4_group_add(sb, input);
754 if (EXT4_SB(sb)->s_journal) {
755 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
756 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
757 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
761 mnt_drop_write_file(file);
762 if (!err && ext4_has_group_desc_csum(sb) &&
763 test_opt(sb, INIT_INODE_TABLE))
764 err = ext4_register_li_request(sb, input->group);
770 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
772 struct ext4_inode_info *ei = EXT4_I(inode);
774 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
775 EXT4_FL_USER_VISIBLE));
777 if (ext4_has_feature_project(inode->i_sb))
778 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
781 /* So that the fiemap access checks can't overflow on 32 bit machines. */
782 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
784 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
786 struct fiemap fiemap;
787 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
788 struct fiemap_extent_info fieinfo = { 0, };
789 struct inode *inode = file_inode(filp);
792 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
795 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
798 fieinfo.fi_flags = fiemap.fm_flags;
799 fieinfo.fi_extents_max = fiemap.fm_extent_count;
800 fieinfo.fi_extents_start = ufiemap->fm_extents;
802 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
804 fiemap.fm_flags = fieinfo.fi_flags;
805 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
806 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
812 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
814 struct inode *inode = file_inode(filp);
815 struct super_block *sb = inode->i_sb;
816 struct ext4_inode_info *ei = EXT4_I(inode);
819 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
822 case FS_IOC_GETFSMAP:
823 return ext4_ioc_getfsmap(sb, (void __user *)arg);
824 case FS_IOC_GETFLAGS:
825 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
826 if (S_ISREG(inode->i_mode))
827 flags &= ~EXT4_PROJINHERIT_FL;
828 return put_user(flags, (int __user *) arg);
829 case FS_IOC_SETFLAGS: {
832 if (!inode_owner_or_capable(inode))
835 if (get_user(flags, (int __user *) arg))
838 if (flags & ~EXT4_FL_USER_VISIBLE)
841 * chattr(1) grabs flags via GETFLAGS, modifies the result and
842 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
843 * more restrictive than just silently masking off visible but
844 * not settable flags as we always did.
846 flags &= EXT4_FL_USER_MODIFIABLE;
847 if (ext4_mask_flags(inode->i_mode, flags) != flags)
850 err = mnt_want_write_file(filp);
855 err = ext4_ioctl_check_immutable(inode,
856 from_kprojid(&init_user_ns, ei->i_projid),
859 err = ext4_ioctl_setflags(inode, flags);
861 mnt_drop_write_file(filp);
864 case EXT4_IOC_GETVERSION:
865 case EXT4_IOC_GETVERSION_OLD:
866 return put_user(inode->i_generation, (int __user *) arg);
867 case EXT4_IOC_SETVERSION:
868 case EXT4_IOC_SETVERSION_OLD: {
870 struct ext4_iloc iloc;
874 if (!inode_owner_or_capable(inode))
877 if (ext4_has_metadata_csum(inode->i_sb)) {
878 ext4_warning(sb, "Setting inode version is not "
879 "supported with metadata_csum enabled.");
883 err = mnt_want_write_file(filp);
886 if (get_user(generation, (int __user *) arg)) {
892 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
893 if (IS_ERR(handle)) {
894 err = PTR_ERR(handle);
897 err = ext4_reserve_inode_write(handle, inode, &iloc);
899 inode->i_ctime = current_time(inode);
900 inode->i_generation = generation;
901 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
903 ext4_journal_stop(handle);
908 mnt_drop_write_file(filp);
911 case EXT4_IOC_GROUP_EXTEND: {
912 ext4_fsblk_t n_blocks_count;
915 err = ext4_resize_begin(sb);
919 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
921 goto group_extend_out;
924 if (ext4_has_feature_bigalloc(sb)) {
925 ext4_msg(sb, KERN_ERR,
926 "Online resizing not supported with bigalloc");
928 goto group_extend_out;
931 err = mnt_want_write_file(filp);
933 goto group_extend_out;
935 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
936 if (EXT4_SB(sb)->s_journal) {
937 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
938 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
939 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
943 mnt_drop_write_file(filp);
949 case EXT4_IOC_MOVE_EXT: {
950 struct move_extent me;
954 if (!(filp->f_mode & FMODE_READ) ||
955 !(filp->f_mode & FMODE_WRITE))
958 if (copy_from_user(&me,
959 (struct move_extent __user *)arg, sizeof(me)))
963 donor = fdget(me.donor_fd);
967 if (!(donor.file->f_mode & FMODE_WRITE)) {
972 if (ext4_has_feature_bigalloc(sb)) {
973 ext4_msg(sb, KERN_ERR,
974 "Online defrag not supported with bigalloc");
977 } else if (IS_DAX(inode)) {
978 ext4_msg(sb, KERN_ERR,
979 "Online defrag not supported with DAX");
984 err = mnt_want_write_file(filp);
988 err = ext4_move_extents(filp, donor.file, me.orig_start,
989 me.donor_start, me.len, &me.moved_len);
990 mnt_drop_write_file(filp);
992 if (copy_to_user((struct move_extent __user *)arg,
1000 case EXT4_IOC_GROUP_ADD: {
1001 struct ext4_new_group_data input;
1003 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1007 return ext4_ioctl_group_add(filp, &input);
1010 case EXT4_IOC_MIGRATE:
1013 if (!inode_owner_or_capable(inode))
1016 err = mnt_want_write_file(filp);
1020 * inode_mutex prevent write and truncate on the file.
1021 * Read still goes through. We take i_data_sem in
1022 * ext4_ext_swap_inode_data before we switch the
1023 * inode format to prevent read.
1025 inode_lock((inode));
1026 err = ext4_ext_migrate(inode);
1027 inode_unlock((inode));
1028 mnt_drop_write_file(filp);
1032 case EXT4_IOC_ALLOC_DA_BLKS:
1035 if (!inode_owner_or_capable(inode))
1038 err = mnt_want_write_file(filp);
1041 err = ext4_alloc_da_blocks(inode);
1042 mnt_drop_write_file(filp);
1046 case EXT4_IOC_SWAP_BOOT:
1049 if (!(filp->f_mode & FMODE_WRITE))
1051 err = mnt_want_write_file(filp);
1054 err = swap_inode_boot_loader(sb, inode);
1055 mnt_drop_write_file(filp);
1059 case EXT4_IOC_RESIZE_FS: {
1060 ext4_fsblk_t n_blocks_count;
1061 int err = 0, err2 = 0;
1062 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1064 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1069 err = ext4_resize_begin(sb);
1073 err = mnt_want_write_file(filp);
1077 err = ext4_resize_fs(sb, n_blocks_count);
1078 if (EXT4_SB(sb)->s_journal) {
1079 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1080 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1081 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1082 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1086 mnt_drop_write_file(filp);
1087 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1088 ext4_has_group_desc_csum(sb) &&
1089 test_opt(sb, INIT_INODE_TABLE))
1090 err = ext4_register_li_request(sb, o_group);
1093 ext4_resize_end(sb);
1099 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1100 struct fstrim_range range;
1103 if (!capable(CAP_SYS_ADMIN))
1106 if (!blk_queue_discard(q))
1110 * We haven't replayed the journal, so we cannot use our
1111 * block-bitmap-guided storage zapping commands.
1113 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1116 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1120 range.minlen = max((unsigned int)range.minlen,
1121 q->limits.discard_granularity);
1122 ret = ext4_trim_fs(sb, &range);
1126 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1132 case EXT4_IOC_PRECACHE_EXTENTS:
1133 return ext4_ext_precache(inode);
1135 case FS_IOC_SET_ENCRYPTION_POLICY:
1136 if (!ext4_has_feature_encrypt(sb))
1138 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1140 case FS_IOC_GET_ENCRYPTION_PWSALT: {
1141 #ifdef CONFIG_FS_ENCRYPTION
1143 struct ext4_sb_info *sbi = EXT4_SB(sb);
1146 if (!ext4_has_feature_encrypt(sb))
1148 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1149 err = mnt_want_write_file(filp);
1152 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1153 if (IS_ERR(handle)) {
1154 err = PTR_ERR(handle);
1155 goto pwsalt_err_exit;
1157 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1159 goto pwsalt_err_journal;
1160 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1161 err = ext4_handle_dirty_metadata(handle, NULL,
1164 err2 = ext4_journal_stop(handle);
1168 mnt_drop_write_file(filp);
1172 if (copy_to_user((void __user *) arg,
1173 sbi->s_es->s_encrypt_pw_salt, 16))
1180 case FS_IOC_GET_ENCRYPTION_POLICY:
1181 if (!ext4_has_feature_encrypt(sb))
1183 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1185 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1186 if (!ext4_has_feature_encrypt(sb))
1188 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1190 case FS_IOC_ADD_ENCRYPTION_KEY:
1191 if (!ext4_has_feature_encrypt(sb))
1193 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1195 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1196 if (!ext4_has_feature_encrypt(sb))
1198 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1200 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1201 if (!ext4_has_feature_encrypt(sb))
1203 return fscrypt_ioctl_remove_key_all_users(filp,
1204 (void __user *)arg);
1205 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1206 if (!ext4_has_feature_encrypt(sb))
1208 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1210 case FS_IOC_GET_ENCRYPTION_NONCE:
1211 if (!ext4_has_feature_encrypt(sb))
1213 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1215 case EXT4_IOC_CLEAR_ES_CACHE:
1217 if (!inode_owner_or_capable(inode))
1219 ext4_clear_inode_es(inode);
1223 case EXT4_IOC_GETSTATE:
1227 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1228 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1229 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1230 state |= EXT4_STATE_FLAG_NEW;
1231 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1232 state |= EXT4_STATE_FLAG_NEWENTRY;
1233 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1234 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1236 return put_user(state, (__u32 __user *) arg);
1239 case EXT4_IOC_GET_ES_CACHE:
1240 return ext4_ioctl_get_es_cache(filp, arg);
1242 case FS_IOC_FSGETXATTR:
1246 ext4_fill_fsxattr(inode, &fa);
1248 if (copy_to_user((struct fsxattr __user *)arg,
1253 case FS_IOC_FSSETXATTR:
1255 struct fsxattr fa, old_fa;
1258 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1262 /* Make sure caller has proper permission */
1263 if (!inode_owner_or_capable(inode))
1266 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1269 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1270 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1273 err = mnt_want_write_file(filp);
1278 ext4_fill_fsxattr(inode, &old_fa);
1279 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1282 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1283 (flags & EXT4_FL_XFLAG_VISIBLE);
1284 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1287 err = ext4_ioctl_setflags(inode, flags);
1290 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1292 inode_unlock(inode);
1293 mnt_drop_write_file(filp);
1296 case EXT4_IOC_SHUTDOWN:
1297 return ext4_shutdown(sb, arg);
1299 case FS_IOC_ENABLE_VERITY:
1300 if (!ext4_has_feature_verity(sb))
1302 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1304 case FS_IOC_MEASURE_VERITY:
1305 if (!ext4_has_feature_verity(sb))
1307 return fsverity_ioctl_measure(filp, (void __user *)arg);
1314 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1318 ext4_fc_start_update(file_inode(filp));
1319 ret = __ext4_ioctl(filp, cmd, arg);
1320 ext4_fc_stop_update(file_inode(filp));
1325 #ifdef CONFIG_COMPAT
1326 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1328 /* These are just misnamed, they actually get/put from/to user an int */
1330 case FS_IOC32_GETFLAGS:
1331 cmd = FS_IOC_GETFLAGS;
1333 case FS_IOC32_SETFLAGS:
1334 cmd = FS_IOC_SETFLAGS;
1336 case EXT4_IOC32_GETVERSION:
1337 cmd = EXT4_IOC_GETVERSION;
1339 case EXT4_IOC32_SETVERSION:
1340 cmd = EXT4_IOC_SETVERSION;
1342 case EXT4_IOC32_GROUP_EXTEND:
1343 cmd = EXT4_IOC_GROUP_EXTEND;
1345 case EXT4_IOC32_GETVERSION_OLD:
1346 cmd = EXT4_IOC_GETVERSION_OLD;
1348 case EXT4_IOC32_SETVERSION_OLD:
1349 cmd = EXT4_IOC_SETVERSION_OLD;
1351 case EXT4_IOC32_GETRSVSZ:
1352 cmd = EXT4_IOC_GETRSVSZ;
1354 case EXT4_IOC32_SETRSVSZ:
1355 cmd = EXT4_IOC_SETRSVSZ;
1357 case EXT4_IOC32_GROUP_ADD: {
1358 struct compat_ext4_new_group_input __user *uinput;
1359 struct ext4_new_group_data input;
1362 uinput = compat_ptr(arg);
1363 err = get_user(input.group, &uinput->group);
1364 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1365 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1366 err |= get_user(input.inode_table, &uinput->inode_table);
1367 err |= get_user(input.blocks_count, &uinput->blocks_count);
1368 err |= get_user(input.reserved_blocks,
1369 &uinput->reserved_blocks);
1372 return ext4_ioctl_group_add(file, &input);
1374 case EXT4_IOC_MOVE_EXT:
1375 case EXT4_IOC_RESIZE_FS:
1377 case EXT4_IOC_PRECACHE_EXTENTS:
1378 case FS_IOC_SET_ENCRYPTION_POLICY:
1379 case FS_IOC_GET_ENCRYPTION_PWSALT:
1380 case FS_IOC_GET_ENCRYPTION_POLICY:
1381 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1382 case FS_IOC_ADD_ENCRYPTION_KEY:
1383 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1384 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1385 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1386 case FS_IOC_GET_ENCRYPTION_NONCE:
1387 case EXT4_IOC_SHUTDOWN:
1388 case FS_IOC_GETFSMAP:
1389 case FS_IOC_ENABLE_VERITY:
1390 case FS_IOC_MEASURE_VERITY:
1391 case EXT4_IOC_CLEAR_ES_CACHE:
1392 case EXT4_IOC_GETSTATE:
1393 case EXT4_IOC_GET_ES_CACHE:
1394 case FS_IOC_FSGETXATTR:
1395 case FS_IOC_FSSETXATTR:
1398 return -ENOIOCTLCMD;
1400 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));