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 /* Allow the DAX flag to be changed on inline directories */
316 if (S_ISDIR(inode->i_mode)) {
317 flags &= ~EXT4_INLINE_DATA_FL;
318 oldflags &= ~EXT4_INLINE_DATA_FL;
321 if (flags & EXT4_DAX_FL) {
322 if ((oldflags & EXT4_DAX_MUT_EXCL) ||
323 ext4_test_inode_state(inode,
324 EXT4_STATE_VERITY_IN_PROGRESS)) {
329 if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
335 static int ext4_ioctl_setflags(struct inode *inode,
338 struct ext4_inode_info *ei = EXT4_I(inode);
339 handle_t *handle = NULL;
340 int err = -EPERM, migrate = 0;
341 struct ext4_iloc iloc;
342 unsigned int oldflags, mask, i;
343 struct super_block *sb = inode->i_sb;
345 /* Is it quota file? Do not allow user to mess with it */
346 if (ext4_is_quota_file(inode))
349 oldflags = ei->i_flags;
351 err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
356 * The JOURNAL_DATA flag can only be changed by
357 * the relevant capability.
359 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
360 if (!capable(CAP_SYS_RESOURCE))
364 if (!dax_compatible(inode, oldflags, flags)) {
369 if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
372 if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
373 if (!ext4_has_feature_casefold(sb)) {
378 if (!S_ISDIR(inode->i_mode)) {
383 if (!ext4_empty_dir(inode)) {
390 * Wait for all pending directio and then flush all the dirty pages
391 * for this file. The flush marks all the pages readonly, so any
392 * subsequent attempt to write to the file (particularly mmap pages)
393 * will come through the filesystem and fail.
395 if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
396 (flags & EXT4_IMMUTABLE_FL)) {
397 inode_dio_wait(inode);
398 err = filemap_write_and_wait(inode->i_mapping);
403 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
404 if (IS_ERR(handle)) {
405 err = PTR_ERR(handle);
409 ext4_handle_sync(handle);
410 err = ext4_reserve_inode_write(handle, inode, &iloc);
414 ext4_dax_dontcache(inode, flags);
416 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
417 if (!(mask & EXT4_FL_USER_MODIFIABLE))
419 /* These flags get special treatment later */
420 if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
423 ext4_set_inode_flag(inode, i);
425 ext4_clear_inode_flag(inode, i);
428 ext4_set_inode_flags(inode, false);
430 inode->i_ctime = current_time(inode);
432 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
434 ext4_journal_stop(handle);
438 if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
440 * Changes to the journaling mode can cause unsafe changes to
441 * S_DAX if the inode is DAX
448 err = ext4_change_inode_journal_flag(inode,
449 flags & EXT4_JOURNAL_DATA_FL);
454 if (flags & EXT4_EXTENTS_FL)
455 err = ext4_ext_migrate(inode);
457 err = ext4_ind_migrate(inode);
465 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
467 struct inode *inode = file_inode(filp);
468 struct super_block *sb = inode->i_sb;
469 struct ext4_inode_info *ei = EXT4_I(inode);
473 struct ext4_iloc iloc;
474 struct ext4_inode *raw_inode;
475 struct dquot *transfer_to[MAXQUOTAS] = { };
477 if (!ext4_has_feature_project(sb)) {
478 if (projid != EXT4_DEF_PROJID)
484 if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
487 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
489 if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
493 /* Is it quota file? Do not allow user to mess with it */
494 if (ext4_is_quota_file(inode))
497 err = ext4_get_inode_loc(inode, &iloc);
501 raw_inode = ext4_raw_inode(&iloc);
502 if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
503 err = ext4_expand_extra_isize(inode,
504 EXT4_SB(sb)->s_want_extra_isize,
512 err = dquot_initialize(inode);
516 handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
517 EXT4_QUOTA_INIT_BLOCKS(sb) +
518 EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
520 return PTR_ERR(handle);
522 err = ext4_reserve_inode_write(handle, inode, &iloc);
526 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
527 if (!IS_ERR(transfer_to[PRJQUOTA])) {
529 /* __dquot_transfer() calls back ext4_get_inode_usage() which
530 * counts xattr inode references.
532 down_read(&EXT4_I(inode)->xattr_sem);
533 err = __dquot_transfer(inode, transfer_to);
534 up_read(&EXT4_I(inode)->xattr_sem);
535 dqput(transfer_to[PRJQUOTA]);
540 EXT4_I(inode)->i_projid = kprojid;
541 inode->i_ctime = current_time(inode);
543 rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
547 ext4_journal_stop(handle);
551 static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
553 if (projid != EXT4_DEF_PROJID)
559 /* Transfer internal flags to xflags */
560 static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
564 if (iflags & EXT4_SYNC_FL)
565 xflags |= FS_XFLAG_SYNC;
566 if (iflags & EXT4_IMMUTABLE_FL)
567 xflags |= FS_XFLAG_IMMUTABLE;
568 if (iflags & EXT4_APPEND_FL)
569 xflags |= FS_XFLAG_APPEND;
570 if (iflags & EXT4_NODUMP_FL)
571 xflags |= FS_XFLAG_NODUMP;
572 if (iflags & EXT4_NOATIME_FL)
573 xflags |= FS_XFLAG_NOATIME;
574 if (iflags & EXT4_PROJINHERIT_FL)
575 xflags |= FS_XFLAG_PROJINHERIT;
576 if (iflags & EXT4_DAX_FL)
577 xflags |= FS_XFLAG_DAX;
581 #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
582 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
583 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \
586 /* Transfer xflags flags to internal */
587 static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
589 unsigned long iflags = 0;
591 if (xflags & FS_XFLAG_SYNC)
592 iflags |= EXT4_SYNC_FL;
593 if (xflags & FS_XFLAG_IMMUTABLE)
594 iflags |= EXT4_IMMUTABLE_FL;
595 if (xflags & FS_XFLAG_APPEND)
596 iflags |= EXT4_APPEND_FL;
597 if (xflags & FS_XFLAG_NODUMP)
598 iflags |= EXT4_NODUMP_FL;
599 if (xflags & FS_XFLAG_NOATIME)
600 iflags |= EXT4_NOATIME_FL;
601 if (xflags & FS_XFLAG_PROJINHERIT)
602 iflags |= EXT4_PROJINHERIT_FL;
603 if (xflags & FS_XFLAG_DAX)
604 iflags |= EXT4_DAX_FL;
609 static int ext4_shutdown(struct super_block *sb, unsigned long arg)
611 struct ext4_sb_info *sbi = EXT4_SB(sb);
614 if (!capable(CAP_SYS_ADMIN))
617 if (get_user(flags, (__u32 __user *)arg))
620 if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
623 if (ext4_forced_shutdown(sbi))
626 ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
627 trace_ext4_shutdown(sb, flags);
630 case EXT4_GOING_FLAGS_DEFAULT:
631 freeze_bdev(sb->s_bdev);
632 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
633 thaw_bdev(sb->s_bdev, sb);
635 case EXT4_GOING_FLAGS_LOGFLUSH:
636 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
637 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
638 (void) ext4_force_commit(sb);
639 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
642 case EXT4_GOING_FLAGS_NOLOGFLUSH:
643 set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
644 if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
645 jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
650 clear_opt(sb, DISCARD);
654 struct getfsmap_info {
655 struct super_block *gi_sb;
656 struct fsmap_head __user *gi_data;
661 static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
663 struct getfsmap_info *info = priv;
666 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
668 info->gi_last_flags = xfm->fmr_flags;
669 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
670 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
671 sizeof(struct fsmap)))
677 static int ext4_ioc_getfsmap(struct super_block *sb,
678 struct fsmap_head __user *arg)
680 struct getfsmap_info info = { NULL };
681 struct ext4_fsmap_head xhead = {0};
682 struct fsmap_head head;
683 bool aborted = false;
686 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
688 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
689 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
690 sizeof(head.fmh_keys[0].fmr_reserved)) ||
691 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
692 sizeof(head.fmh_keys[1].fmr_reserved)))
695 * ext4 doesn't report file extents at all, so the only valid
696 * file offsets are the magic ones (all zeroes or all ones).
698 if (head.fmh_keys[0].fmr_offset ||
699 (head.fmh_keys[1].fmr_offset != 0 &&
700 head.fmh_keys[1].fmr_offset != -1ULL))
703 xhead.fmh_iflags = head.fmh_iflags;
704 xhead.fmh_count = head.fmh_count;
705 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
706 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
708 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
709 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
713 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
714 if (error == EXT4_QUERY_RANGE_ABORT) {
720 /* If we didn't abort, set the "last" flag in the last fmx */
721 if (!aborted && info.gi_idx) {
722 info.gi_last_flags |= FMR_OF_LAST;
723 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
725 sizeof(info.gi_last_flags)))
729 /* copy back header */
730 head.fmh_entries = xhead.fmh_entries;
731 head.fmh_oflags = xhead.fmh_oflags;
732 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
738 static long ext4_ioctl_group_add(struct file *file,
739 struct ext4_new_group_data *input)
741 struct super_block *sb = file_inode(file)->i_sb;
744 err = ext4_resize_begin(sb);
748 if (ext4_has_feature_bigalloc(sb)) {
749 ext4_msg(sb, KERN_ERR,
750 "Online resizing not supported with bigalloc");
755 err = mnt_want_write_file(file);
759 err = ext4_group_add(sb, input);
760 if (EXT4_SB(sb)->s_journal) {
761 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
762 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
763 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
767 mnt_drop_write_file(file);
768 if (!err && ext4_has_group_desc_csum(sb) &&
769 test_opt(sb, INIT_INODE_TABLE))
770 err = ext4_register_li_request(sb, input->group);
776 static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
778 struct ext4_inode_info *ei = EXT4_I(inode);
780 simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
781 EXT4_FL_USER_VISIBLE));
783 if (ext4_has_feature_project(inode->i_sb))
784 fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
787 /* So that the fiemap access checks can't overflow on 32 bit machines. */
788 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
790 static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
792 struct fiemap fiemap;
793 struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
794 struct fiemap_extent_info fieinfo = { 0, };
795 struct inode *inode = file_inode(filp);
798 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
801 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
804 fieinfo.fi_flags = fiemap.fm_flags;
805 fieinfo.fi_extents_max = fiemap.fm_extent_count;
806 fieinfo.fi_extents_start = ufiemap->fm_extents;
808 error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
810 fiemap.fm_flags = fieinfo.fi_flags;
811 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
812 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
818 static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
820 struct inode *inode = file_inode(filp);
821 struct super_block *sb = inode->i_sb;
822 struct ext4_inode_info *ei = EXT4_I(inode);
825 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
828 case FS_IOC_GETFSMAP:
829 return ext4_ioc_getfsmap(sb, (void __user *)arg);
830 case FS_IOC_GETFLAGS:
831 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
832 if (S_ISREG(inode->i_mode))
833 flags &= ~EXT4_PROJINHERIT_FL;
834 return put_user(flags, (int __user *) arg);
835 case FS_IOC_SETFLAGS: {
838 if (!inode_owner_or_capable(inode))
841 if (get_user(flags, (int __user *) arg))
844 if (flags & ~EXT4_FL_USER_VISIBLE)
847 * chattr(1) grabs flags via GETFLAGS, modifies the result and
848 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
849 * more restrictive than just silently masking off visible but
850 * not settable flags as we always did.
852 flags &= EXT4_FL_USER_MODIFIABLE;
853 if (ext4_mask_flags(inode->i_mode, flags) != flags)
856 err = mnt_want_write_file(filp);
861 err = ext4_ioctl_check_immutable(inode,
862 from_kprojid(&init_user_ns, ei->i_projid),
865 err = ext4_ioctl_setflags(inode, flags);
867 mnt_drop_write_file(filp);
870 case EXT4_IOC_GETVERSION:
871 case EXT4_IOC_GETVERSION_OLD:
872 return put_user(inode->i_generation, (int __user *) arg);
873 case EXT4_IOC_SETVERSION:
874 case EXT4_IOC_SETVERSION_OLD: {
876 struct ext4_iloc iloc;
880 if (!inode_owner_or_capable(inode))
883 if (ext4_has_metadata_csum(inode->i_sb)) {
884 ext4_warning(sb, "Setting inode version is not "
885 "supported with metadata_csum enabled.");
889 err = mnt_want_write_file(filp);
892 if (get_user(generation, (int __user *) arg)) {
898 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
899 if (IS_ERR(handle)) {
900 err = PTR_ERR(handle);
903 err = ext4_reserve_inode_write(handle, inode, &iloc);
905 inode->i_ctime = current_time(inode);
906 inode->i_generation = generation;
907 err = ext4_mark_iloc_dirty(handle, inode, &iloc);
909 ext4_journal_stop(handle);
914 mnt_drop_write_file(filp);
917 case EXT4_IOC_GROUP_EXTEND: {
918 ext4_fsblk_t n_blocks_count;
921 err = ext4_resize_begin(sb);
925 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
927 goto group_extend_out;
930 if (ext4_has_feature_bigalloc(sb)) {
931 ext4_msg(sb, KERN_ERR,
932 "Online resizing not supported with bigalloc");
934 goto group_extend_out;
937 err = mnt_want_write_file(filp);
939 goto group_extend_out;
941 err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
942 if (EXT4_SB(sb)->s_journal) {
943 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
944 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
945 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
949 mnt_drop_write_file(filp);
955 case EXT4_IOC_MOVE_EXT: {
956 struct move_extent me;
960 if (!(filp->f_mode & FMODE_READ) ||
961 !(filp->f_mode & FMODE_WRITE))
964 if (copy_from_user(&me,
965 (struct move_extent __user *)arg, sizeof(me)))
969 donor = fdget(me.donor_fd);
973 if (!(donor.file->f_mode & FMODE_WRITE)) {
978 if (ext4_has_feature_bigalloc(sb)) {
979 ext4_msg(sb, KERN_ERR,
980 "Online defrag not supported with bigalloc");
983 } else if (IS_DAX(inode)) {
984 ext4_msg(sb, KERN_ERR,
985 "Online defrag not supported with DAX");
990 err = mnt_want_write_file(filp);
994 err = ext4_move_extents(filp, donor.file, me.orig_start,
995 me.donor_start, me.len, &me.moved_len);
996 mnt_drop_write_file(filp);
998 if (copy_to_user((struct move_extent __user *)arg,
1006 case EXT4_IOC_GROUP_ADD: {
1007 struct ext4_new_group_data input;
1009 if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
1013 return ext4_ioctl_group_add(filp, &input);
1016 case EXT4_IOC_MIGRATE:
1019 if (!inode_owner_or_capable(inode))
1022 err = mnt_want_write_file(filp);
1026 * inode_mutex prevent write and truncate on the file.
1027 * Read still goes through. We take i_data_sem in
1028 * ext4_ext_swap_inode_data before we switch the
1029 * inode format to prevent read.
1031 inode_lock((inode));
1032 err = ext4_ext_migrate(inode);
1033 inode_unlock((inode));
1034 mnt_drop_write_file(filp);
1038 case EXT4_IOC_ALLOC_DA_BLKS:
1041 if (!inode_owner_or_capable(inode))
1044 err = mnt_want_write_file(filp);
1047 err = ext4_alloc_da_blocks(inode);
1048 mnt_drop_write_file(filp);
1052 case EXT4_IOC_SWAP_BOOT:
1055 if (!(filp->f_mode & FMODE_WRITE))
1057 err = mnt_want_write_file(filp);
1060 err = swap_inode_boot_loader(sb, inode);
1061 mnt_drop_write_file(filp);
1065 case EXT4_IOC_RESIZE_FS: {
1066 ext4_fsblk_t n_blocks_count;
1067 int err = 0, err2 = 0;
1068 ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
1070 if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
1075 err = ext4_resize_begin(sb);
1079 err = mnt_want_write_file(filp);
1083 err = ext4_resize_fs(sb, n_blocks_count);
1084 if (EXT4_SB(sb)->s_journal) {
1085 ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
1086 jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
1087 err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
1088 jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
1092 mnt_drop_write_file(filp);
1093 if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
1094 ext4_has_group_desc_csum(sb) &&
1095 test_opt(sb, INIT_INODE_TABLE))
1096 err = ext4_register_li_request(sb, o_group);
1099 ext4_resize_end(sb);
1105 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1106 struct fstrim_range range;
1109 if (!capable(CAP_SYS_ADMIN))
1112 if (!blk_queue_discard(q))
1116 * We haven't replayed the journal, so we cannot use our
1117 * block-bitmap-guided storage zapping commands.
1119 if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
1122 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1126 ret = ext4_trim_fs(sb, &range);
1130 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1136 case EXT4_IOC_PRECACHE_EXTENTS:
1137 return ext4_ext_precache(inode);
1139 case FS_IOC_SET_ENCRYPTION_POLICY:
1140 if (!ext4_has_feature_encrypt(sb))
1142 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1144 case FS_IOC_GET_ENCRYPTION_PWSALT: {
1145 #ifdef CONFIG_FS_ENCRYPTION
1147 struct ext4_sb_info *sbi = EXT4_SB(sb);
1150 if (!ext4_has_feature_encrypt(sb))
1152 if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
1153 err = mnt_want_write_file(filp);
1156 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
1157 if (IS_ERR(handle)) {
1158 err = PTR_ERR(handle);
1159 goto pwsalt_err_exit;
1161 err = ext4_journal_get_write_access(handle, sbi->s_sbh);
1163 goto pwsalt_err_journal;
1164 lock_buffer(sbi->s_sbh);
1165 generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
1166 ext4_superblock_csum_set(sb);
1167 unlock_buffer(sbi->s_sbh);
1168 err = ext4_handle_dirty_metadata(handle, NULL,
1171 err2 = ext4_journal_stop(handle);
1175 mnt_drop_write_file(filp);
1179 if (copy_to_user((void __user *) arg,
1180 sbi->s_es->s_encrypt_pw_salt, 16))
1187 case FS_IOC_GET_ENCRYPTION_POLICY:
1188 if (!ext4_has_feature_encrypt(sb))
1190 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1192 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1193 if (!ext4_has_feature_encrypt(sb))
1195 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
1197 case FS_IOC_ADD_ENCRYPTION_KEY:
1198 if (!ext4_has_feature_encrypt(sb))
1200 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
1202 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1203 if (!ext4_has_feature_encrypt(sb))
1205 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
1207 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1208 if (!ext4_has_feature_encrypt(sb))
1210 return fscrypt_ioctl_remove_key_all_users(filp,
1211 (void __user *)arg);
1212 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1213 if (!ext4_has_feature_encrypt(sb))
1215 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
1217 case FS_IOC_GET_ENCRYPTION_NONCE:
1218 if (!ext4_has_feature_encrypt(sb))
1220 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
1222 case EXT4_IOC_CLEAR_ES_CACHE:
1224 if (!inode_owner_or_capable(inode))
1226 ext4_clear_inode_es(inode);
1230 case EXT4_IOC_GETSTATE:
1234 if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
1235 state |= EXT4_STATE_FLAG_EXT_PRECACHED;
1236 if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
1237 state |= EXT4_STATE_FLAG_NEW;
1238 if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
1239 state |= EXT4_STATE_FLAG_NEWENTRY;
1240 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
1241 state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
1243 return put_user(state, (__u32 __user *) arg);
1246 case EXT4_IOC_GET_ES_CACHE:
1247 return ext4_ioctl_get_es_cache(filp, arg);
1249 case FS_IOC_FSGETXATTR:
1253 ext4_fill_fsxattr(inode, &fa);
1255 if (copy_to_user((struct fsxattr __user *)arg,
1260 case FS_IOC_FSSETXATTR:
1262 struct fsxattr fa, old_fa;
1265 if (copy_from_user(&fa, (struct fsxattr __user *)arg,
1269 /* Make sure caller has proper permission */
1270 if (!inode_owner_or_capable(inode))
1273 if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
1276 flags = ext4_xflags_to_iflags(fa.fsx_xflags);
1277 if (ext4_mask_flags(inode->i_mode, flags) != flags)
1280 err = mnt_want_write_file(filp);
1285 ext4_fill_fsxattr(inode, &old_fa);
1286 err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
1289 flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
1290 (flags & EXT4_FL_XFLAG_VISIBLE);
1291 err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
1294 err = ext4_ioctl_setflags(inode, flags);
1297 err = ext4_ioctl_setproject(filp, fa.fsx_projid);
1299 inode_unlock(inode);
1300 mnt_drop_write_file(filp);
1303 case EXT4_IOC_SHUTDOWN:
1304 return ext4_shutdown(sb, arg);
1306 case FS_IOC_ENABLE_VERITY:
1307 if (!ext4_has_feature_verity(sb))
1309 return fsverity_ioctl_enable(filp, (const void __user *)arg);
1311 case FS_IOC_MEASURE_VERITY:
1312 if (!ext4_has_feature_verity(sb))
1314 return fsverity_ioctl_measure(filp, (void __user *)arg);
1321 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1325 ext4_fc_start_update(file_inode(filp));
1326 ret = __ext4_ioctl(filp, cmd, arg);
1327 ext4_fc_stop_update(file_inode(filp));
1332 #ifdef CONFIG_COMPAT
1333 long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1335 /* These are just misnamed, they actually get/put from/to user an int */
1337 case FS_IOC32_GETFLAGS:
1338 cmd = FS_IOC_GETFLAGS;
1340 case FS_IOC32_SETFLAGS:
1341 cmd = FS_IOC_SETFLAGS;
1343 case EXT4_IOC32_GETVERSION:
1344 cmd = EXT4_IOC_GETVERSION;
1346 case EXT4_IOC32_SETVERSION:
1347 cmd = EXT4_IOC_SETVERSION;
1349 case EXT4_IOC32_GROUP_EXTEND:
1350 cmd = EXT4_IOC_GROUP_EXTEND;
1352 case EXT4_IOC32_GETVERSION_OLD:
1353 cmd = EXT4_IOC_GETVERSION_OLD;
1355 case EXT4_IOC32_SETVERSION_OLD:
1356 cmd = EXT4_IOC_SETVERSION_OLD;
1358 case EXT4_IOC32_GETRSVSZ:
1359 cmd = EXT4_IOC_GETRSVSZ;
1361 case EXT4_IOC32_SETRSVSZ:
1362 cmd = EXT4_IOC_SETRSVSZ;
1364 case EXT4_IOC32_GROUP_ADD: {
1365 struct compat_ext4_new_group_input __user *uinput;
1366 struct ext4_new_group_data input;
1369 uinput = compat_ptr(arg);
1370 err = get_user(input.group, &uinput->group);
1371 err |= get_user(input.block_bitmap, &uinput->block_bitmap);
1372 err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
1373 err |= get_user(input.inode_table, &uinput->inode_table);
1374 err |= get_user(input.blocks_count, &uinput->blocks_count);
1375 err |= get_user(input.reserved_blocks,
1376 &uinput->reserved_blocks);
1379 return ext4_ioctl_group_add(file, &input);
1381 case EXT4_IOC_MOVE_EXT:
1382 case EXT4_IOC_RESIZE_FS:
1384 case EXT4_IOC_PRECACHE_EXTENTS:
1385 case FS_IOC_SET_ENCRYPTION_POLICY:
1386 case FS_IOC_GET_ENCRYPTION_PWSALT:
1387 case FS_IOC_GET_ENCRYPTION_POLICY:
1388 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
1389 case FS_IOC_ADD_ENCRYPTION_KEY:
1390 case FS_IOC_REMOVE_ENCRYPTION_KEY:
1391 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
1392 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
1393 case FS_IOC_GET_ENCRYPTION_NONCE:
1394 case EXT4_IOC_SHUTDOWN:
1395 case FS_IOC_GETFSMAP:
1396 case FS_IOC_ENABLE_VERITY:
1397 case FS_IOC_MEASURE_VERITY:
1398 case EXT4_IOC_CLEAR_ES_CACHE:
1399 case EXT4_IOC_GETSTATE:
1400 case EXT4_IOC_GET_ES_CACHE:
1401 case FS_IOC_FSGETXATTR:
1402 case FS_IOC_FSSETXATTR:
1405 return -ENOIOCTLCMD;
1407 return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));