Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1714 insertions, 0 deletions

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
new file mode 100644
index 0000000000..0bfe2ce589
--- /dev/null
+++ b/fs/ext4/ioctl.c
@@ -0,0 +1,1714 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/ext4/ioctl.c
+ *
+ * Copyright (C) 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ */
+
+#include <linux/fs.h>
+#include <linux/capability.h>
+#include <linux/time.h>
+#include <linux/compat.h>
+#include <linux/mount.h>
+#include <linux/file.h>
+#include <linux/quotaops.h>
+#include <linux/random.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/iversion.h>
+#include <linux/fileattr.h>
+#include <linux/uuid.h>
+#include "ext4_jbd2.h"
+#include "ext4.h"
+#include <linux/fsmap.h>
+#include "fsmap.h"
+#include <trace/events/ext4.h>
+
+typedef void ext4_update_sb_callback(struct ext4_super_block *es,
+				       const void *arg);
+
+/*
+ * Superblock modification callback function for changing file system
+ * label
+ */
+static void ext4_sb_setlabel(struct ext4_super_block *es, const void *arg)
+{
+	/* Sanity check, this should never happen */
+	BUILD_BUG_ON(sizeof(es->s_volume_name) < EXT4_LABEL_MAX);
+
+	memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX);
+}
+
+/*
+ * Superblock modification callback function for changing file system
+ * UUID.
+ */
+static void ext4_sb_setuuid(struct ext4_super_block *es, const void *arg)
+{
+	memcpy(es->s_uuid, (__u8 *)arg, UUID_SIZE);
+}
+
+static
+int ext4_update_primary_sb(struct super_block *sb, handle_t *handle,
+			   ext4_update_sb_callback func,
+			   const void *arg)
+{
+	int err = 0;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct buffer_head *bh = sbi->s_sbh;
+	struct ext4_super_block *es = sbi->s_es;
+
+	trace_ext4_update_sb(sb, bh->b_blocknr, 1);
+
+	BUFFER_TRACE(bh, "get_write_access");
+	err = ext4_journal_get_write_access(handle, sb,
+					    bh,
+					    EXT4_JTR_NONE);
+	if (err)
+		goto out_err;
+
+	lock_buffer(bh);
+	func(es, arg);
+	ext4_superblock_csum_set(sb);
+	unlock_buffer(bh);
+
+	if (buffer_write_io_error(bh) || !buffer_uptodate(bh)) {
+		ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "
+			 "superblock detected");
+		clear_buffer_write_io_error(bh);
+		set_buffer_uptodate(bh);
+	}
+
+	err = ext4_handle_dirty_metadata(handle, NULL, bh);
+	if (err)
+		goto out_err;
+	err = sync_dirty_buffer(bh);
+out_err:
+	ext4_std_error(sb, err);
+	return err;
+}
+
+/*
+ * Update one backup superblock in the group 'grp' using the callback
+ * function 'func' and argument 'arg'. If the handle is NULL the
+ * modification is not journalled.
+ *
+ * Returns: 0 when no modification was done (no superblock in the group)
+ *	    1 when the modification was successful
+ *	   <0 on error
+ */
+static int ext4_update_backup_sb(struct super_block *sb,
+				 handle_t *handle, ext4_group_t grp,
+				 ext4_update_sb_callback func, const void *arg)
+{
+	int err = 0;
+	ext4_fsblk_t sb_block;
+	struct buffer_head *bh;
+	unsigned long offset = 0;
+	struct ext4_super_block *es;
+
+	if (!ext4_bg_has_super(sb, grp))
+		return 0;
+
+	/*
+	 * For the group 0 there is always 1k padding, so we have
+	 * either adjust offset, or sb_block depending on blocksize
+	 */
+	if (grp == 0) {
+		sb_block = 1 * EXT4_MIN_BLOCK_SIZE;
+		offset = do_div(sb_block, sb->s_blocksize);
+	} else {
+		sb_block = ext4_group_first_block_no(sb, grp);
+		offset = 0;
+	}
+
+	trace_ext4_update_sb(sb, sb_block, handle ? 1 : 0);
+
+	bh = ext4_sb_bread(sb, sb_block, 0);
+	if (IS_ERR(bh))
+		return PTR_ERR(bh);
+
+	if (handle) {
+		BUFFER_TRACE(bh, "get_write_access");
+		err = ext4_journal_get_write_access(handle, sb,
+						    bh,
+						    EXT4_JTR_NONE);
+		if (err)
+			goto out_bh;
+	}
+
+	es = (struct ext4_super_block *) (bh->b_data + offset);
+	lock_buffer(bh);
+	if (ext4_has_metadata_csum(sb) &&
+	    es->s_checksum != ext4_superblock_csum(sb, es)) {
+		ext4_msg(sb, KERN_ERR, "Invalid checksum for backup "
+		"superblock %llu", sb_block);
+		unlock_buffer(bh);
+		goto out_bh;
+	}
+	func(es, arg);
+	if (ext4_has_metadata_csum(sb))
+		es->s_checksum = ext4_superblock_csum(sb, es);
+	set_buffer_uptodate(bh);
+	unlock_buffer(bh);
+
+	if (handle) {
+		err = ext4_handle_dirty_metadata(handle, NULL, bh);
+		if (err)
+			goto out_bh;
+	} else {
+		BUFFER_TRACE(bh, "marking dirty");
+		mark_buffer_dirty(bh);
+	}
+	err = sync_dirty_buffer(bh);
+
+out_bh:
+	brelse(bh);
+	ext4_std_error(sb, err);
+	return (err) ? err : 1;
+}
+
+/*
+ * Update primary and backup superblocks using the provided function
+ * func and argument arg.
+ *
+ * Only the primary superblock and at most two backup superblock
+ * modifications are journalled; the rest is modified without journal.
+ * This is safe because e2fsck will re-write them if there is a problem,
+ * and we're very unlikely to ever need more than two backups.
+ */
+static
+int ext4_update_superblocks_fn(struct super_block *sb,
+			       ext4_update_sb_callback func,
+			       const void *arg)
+{
+	handle_t *handle;
+	ext4_group_t ngroups;
+	unsigned int three = 1;
+	unsigned int five = 5;
+	unsigned int seven = 7;
+	int err = 0, ret, i;
+	ext4_group_t grp, primary_grp;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+	/*
+	 * We can't update superblocks while the online resize is running
+	 */
+	if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
+				  &sbi->s_ext4_flags)) {
+		ext4_msg(sb, KERN_ERR, "Can't modify superblock while"
+			 "performing online resize");
+		return -EBUSY;
+	}
+
+	/*
+	 * We're only going to update primary superblock and two
+	 * backup superblocks in this transaction.
+	 */
+	handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3);
+	if (IS_ERR(handle)) {
+		err = PTR_ERR(handle);
+		goto out;
+	}
+
+	/* Update primary superblock */
+	err = ext4_update_primary_sb(sb, handle, func, arg);
+	if (err) {
+		ext4_msg(sb, KERN_ERR, "Failed to update primary "
+			 "superblock");
+		goto out_journal;
+	}
+
+	primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr);
+	ngroups = ext4_get_groups_count(sb);
+
+	/*
+	 * Update backup superblocks. We have to start from group 0
+	 * because it might not be where the primary superblock is
+	 * if the fs is mounted with -o sb=<backup_sb_block>
+	 */
+	i = 0;
+	grp = 0;
+	while (grp < ngroups) {
+		/* Skip primary superblock */
+		if (grp == primary_grp)
+			goto next_grp;
+
+		ret = ext4_update_backup_sb(sb, handle, grp, func, arg);
+		if (ret < 0) {
+			/* Ignore bad checksum; try to update next sb */
+			if (ret == -EFSBADCRC)
+				goto next_grp;
+			err = ret;
+			goto out_journal;
+		}
+
+		i += ret;
+		if (handle && i > 1) {
+			/*
+			 * We're only journalling primary superblock and
+			 * two backup superblocks; the rest is not
+			 * journalled.
+			 */
+			err = ext4_journal_stop(handle);
+			if (err)
+				goto out;
+			handle = NULL;
+		}
+next_grp:
+		grp = ext4_list_backups(sb, &three, &five, &seven);
+	}
+
+out_journal:
+	if (handle) {
+		ret = ext4_journal_stop(handle);
+		if (ret && !err)
+			err = ret;
+	}
+out:
+	clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags);
+	smp_mb__after_atomic();
+	return err ? err : 0;
+}
+
+/*
+ * Swap memory between @a and @b for @len bytes.
+ *
+ * @a:          pointer to first memory area
+ * @b:          pointer to second memory area
+ * @len:        number of bytes to swap
+ *
+ */
+static void memswap(void *a, void *b, size_t len)
+{
+	unsigned char *ap, *bp;
+
+	ap = (unsigned char *)a;
+	bp = (unsigned char *)b;
+	while (len-- > 0) {
+		swap(*ap, *bp);
+		ap++;
+		bp++;
+	}
+}
+
+/*
+ * Swap i_data and associated attributes between @inode1 and @inode2.
+ * This function is used for the primary swap between inode1 and inode2
+ * and also to revert this primary swap in case of errors.
+ *
+ * Therefore you have to make sure, that calling this method twice
+ * will revert all changes.
+ *
+ * @inode1:     pointer to first inode
+ * @inode2:     pointer to second inode
+ */
+static void swap_inode_data(struct inode *inode1, struct inode *inode2)
+{
+	loff_t isize;
+	struct ext4_inode_info *ei1;
+	struct ext4_inode_info *ei2;
+	unsigned long tmp;
+
+	ei1 = EXT4_I(inode1);
+	ei2 = EXT4_I(inode2);
+
+	swap(inode1->i_version, inode2->i_version);
+	swap(inode1->i_atime, inode2->i_atime);
+	swap(inode1->i_mtime, inode2->i_mtime);
+
+	memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
+	tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
+	ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
+		(ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
+	ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
+	swap(ei1->i_disksize, ei2->i_disksize);
+	ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
+	ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
+
+	isize = i_size_read(inode1);
+	i_size_write(inode1, i_size_read(inode2));
+	i_size_write(inode2, isize);
+}
+
+void ext4_reset_inode_seed(struct inode *inode)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+	__le32 inum = cpu_to_le32(inode->i_ino);
+	__le32 gen = cpu_to_le32(inode->i_generation);
+	__u32 csum;
+
+	if (!ext4_has_metadata_csum(inode->i_sb))
+		return;
+
+	csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
+	ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
+}
+
+/*
+ * Swap the information from the given @inode and the inode
+ * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
+ * important fields of the inodes.
+ *
+ * @sb:         the super block of the filesystem
+ * @idmap:	idmap of the mount the inode was found from
+ * @inode:      the inode to swap with EXT4_BOOT_LOADER_INO
+ *
+ */
+static long swap_inode_boot_loader(struct super_block *sb,
+				struct mnt_idmap *idmap,
+				struct inode *inode)
+{
+	handle_t *handle;
+	int err;
+	struct inode *inode_bl;
+	struct ext4_inode_info *ei_bl;
+	qsize_t size, size_bl, diff;
+	blkcnt_t blocks;
+	unsigned short bytes;
+
+	inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO,
+			EXT4_IGET_SPECIAL | EXT4_IGET_BAD);
+	if (IS_ERR(inode_bl))
+		return PTR_ERR(inode_bl);
+	ei_bl = EXT4_I(inode_bl);
+
+	/* Protect orig inodes against a truncate and make sure,
+	 * that only 1 swap_inode_boot_loader is running. */
+	lock_two_nondirectories(inode, inode_bl);
+
+	if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
+	    IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
+	    (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
+	    ext4_has_inline_data(inode)) {
+		err = -EINVAL;
+		goto journal_err_out;
+	}
+
+	if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
+	    !inode_owner_or_capable(idmap, inode) ||
+	    !capable(CAP_SYS_ADMIN)) {
+		err = -EPERM;
+		goto journal_err_out;
+	}
+
+	filemap_invalidate_lock(inode->i_mapping);
+	err = filemap_write_and_wait(inode->i_mapping);
+	if (err)
+		goto err_out;
+
+	err = filemap_write_and_wait(inode_bl->i_mapping);
+	if (err)
+		goto err_out;
+
+	/* Wait for all existing dio workers */
+	inode_dio_wait(inode);
+	inode_dio_wait(inode_bl);
+
+	truncate_inode_pages(&inode->i_data, 0);
+	truncate_inode_pages(&inode_bl->i_data, 0);
+
+	handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
+	if (IS_ERR(handle)) {
+		err = -EINVAL;
+		goto err_out;
+	}
+	ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle);
+
+	/* Protect extent tree against block allocations via delalloc */
+	ext4_double_down_write_data_sem(inode, inode_bl);
+
+	if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
+		/* this inode has never been used as a BOOT_LOADER */
+		set_nlink(inode_bl, 1);
+		i_uid_write(inode_bl, 0);
+		i_gid_write(inode_bl, 0);
+		inode_bl->i_flags = 0;
+		ei_bl->i_flags = 0;
+		inode_set_iversion(inode_bl, 1);
+		i_size_write(inode_bl, 0);
+		EXT4_I(inode_bl)->i_disksize = inode_bl->i_size;
+		inode_bl->i_mode = S_IFREG;
+		if (ext4_has_feature_extents(sb)) {
+			ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
+			ext4_ext_tree_init(handle, inode_bl);
+		} else
+			memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
+	}
+
+	err = dquot_initialize(inode);
+	if (err)
+		goto err_out1;
+
+	size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
+	size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
+	diff = size - size_bl;
+	swap_inode_data(inode, inode_bl);
+
+	inode_set_ctime_current(inode);
+	inode_set_ctime_current(inode_bl);
+	inode_inc_iversion(inode);
+
+	inode->i_generation = get_random_u32();
+	inode_bl->i_generation = get_random_u32();
+	ext4_reset_inode_seed(inode);
+	ext4_reset_inode_seed(inode_bl);
+
+	ext4_discard_preallocations(inode, 0);
+
+	err = ext4_mark_inode_dirty(handle, inode);
+	if (err < 0) {
+		/* No need to update quota information. */
+		ext4_warning(inode->i_sb,
+			"couldn't mark inode #%lu dirty (err %d)",
+			inode->i_ino, err);
+		/* Revert all changes: */
+		swap_inode_data(inode, inode_bl);
+		ext4_mark_inode_dirty(handle, inode);
+		goto err_out1;
+	}
+
+	blocks = inode_bl->i_blocks;
+	bytes = inode_bl->i_bytes;
+	inode_bl->i_blocks = inode->i_blocks;
+	inode_bl->i_bytes = inode->i_bytes;
+	err = ext4_mark_inode_dirty(handle, inode_bl);
+	if (err < 0) {
+		/* No need to update quota information. */
+		ext4_warning(inode_bl->i_sb,
+			"couldn't mark inode #%lu dirty (err %d)",
+			inode_bl->i_ino, err);
+		goto revert;
+	}
+
+	/* Bootloader inode should not be counted into quota information. */
+	if (diff > 0)
+		dquot_free_space(inode, diff);
+	else
+		err = dquot_alloc_space(inode, -1 * diff);
+
+	if (err < 0) {
+revert:
+		/* Revert all changes: */
+		inode_bl->i_blocks = blocks;
+		inode_bl->i_bytes = bytes;
+		swap_inode_data(inode, inode_bl);
+		ext4_mark_inode_dirty(handle, inode);
+		ext4_mark_inode_dirty(handle, inode_bl);
+	}
+
+err_out1:
+	ext4_journal_stop(handle);
+	ext4_double_up_write_data_sem(inode, inode_bl);
+
+err_out:
+	filemap_invalidate_unlock(inode->i_mapping);
+journal_err_out:
+	unlock_two_nondirectories(inode, inode_bl);
+	iput(inode_bl);
+	return err;
+}
+
+/*
+ * If immutable is set and we are not clearing it, we're not allowed to change
+ * anything else in the inode.  Don't error out if we're only trying to set
+ * immutable on an immutable file.
+ */
+static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
+				      unsigned int flags)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	unsigned int oldflags = ei->i_flags;
+
+	if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
+		return 0;
+
+	if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
+		return -EPERM;
+	if (ext4_has_feature_project(inode->i_sb) &&
+	    __kprojid_val(ei->i_projid) != new_projid)
+		return -EPERM;
+
+	return 0;
+}
+
+static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+
+	if (S_ISDIR(inode->i_mode))
+		return;
+
+	if (test_opt2(inode->i_sb, DAX_NEVER) ||
+	    test_opt(inode->i_sb, DAX_ALWAYS))
+		return;
+
+	if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
+		d_mark_dontcache(inode);
+}
+
+static bool dax_compatible(struct inode *inode, unsigned int oldflags,
+			   unsigned int flags)
+{
+	/* Allow the DAX flag to be changed on inline directories */
+	if (S_ISDIR(inode->i_mode)) {
+		flags &= ~EXT4_INLINE_DATA_FL;
+		oldflags &= ~EXT4_INLINE_DATA_FL;
+	}
+
+	if (flags & EXT4_DAX_FL) {
+		if ((oldflags & EXT4_DAX_MUT_EXCL) ||
+		     ext4_test_inode_state(inode,
+					  EXT4_STATE_VERITY_IN_PROGRESS)) {
+			return false;
+		}
+	}
+
+	if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
+			return false;
+
+	return true;
+}
+
+static int ext4_ioctl_setflags(struct inode *inode,
+			       unsigned int flags)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	handle_t *handle = NULL;
+	int err = -EPERM, migrate = 0;
+	struct ext4_iloc iloc;
+	unsigned int oldflags, mask, i;
+	struct super_block *sb = inode->i_sb;
+
+	/* Is it quota file? Do not allow user to mess with it */
+	if (ext4_is_quota_file(inode))
+		goto flags_out;
+
+	oldflags = ei->i_flags;
+	/*
+	 * The JOURNAL_DATA flag can only be changed by
+	 * the relevant capability.
+	 */
+	if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+		if (!capable(CAP_SYS_RESOURCE))
+			goto flags_out;
+	}
+
+	if (!dax_compatible(inode, oldflags, flags)) {
+		err = -EOPNOTSUPP;
+		goto flags_out;
+	}
+
+	if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
+		migrate = 1;
+
+	if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
+		if (!ext4_has_feature_casefold(sb)) {
+			err = -EOPNOTSUPP;
+			goto flags_out;
+		}
+
+		if (!S_ISDIR(inode->i_mode)) {
+			err = -ENOTDIR;
+			goto flags_out;
+		}
+
+		if (!ext4_empty_dir(inode)) {
+			err = -ENOTEMPTY;
+			goto flags_out;
+		}
+	}
+
+	/*
+	 * Wait for all pending directio and then flush all the dirty pages
+	 * for this file.  The flush marks all the pages readonly, so any
+	 * subsequent attempt to write to the file (particularly mmap pages)
+	 * will come through the filesystem and fail.
+	 */
+	if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
+	    (flags & EXT4_IMMUTABLE_FL)) {
+		inode_dio_wait(inode);
+		err = filemap_write_and_wait(inode->i_mapping);
+		if (err)
+			goto flags_out;
+	}
+
+	handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
+	if (IS_ERR(handle)) {
+		err = PTR_ERR(handle);
+		goto flags_out;
+	}
+	if (IS_SYNC(inode))
+		ext4_handle_sync(handle);
+	err = ext4_reserve_inode_write(handle, inode, &iloc);
+	if (err)
+		goto flags_err;
+
+	ext4_dax_dontcache(inode, flags);
+
+	for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
+		if (!(mask & EXT4_FL_USER_MODIFIABLE))
+			continue;
+		/* These flags get special treatment later */
+		if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
+			continue;
+		if (mask & flags)
+			ext4_set_inode_flag(inode, i);
+		else
+			ext4_clear_inode_flag(inode, i);
+	}
+
+	ext4_set_inode_flags(inode, false);
+
+	inode_set_ctime_current(inode);
+	inode_inc_iversion(inode);
+
+	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
+flags_err:
+	ext4_journal_stop(handle);
+	if (err)
+		goto flags_out;
+
+	if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+		/*
+		 * Changes to the journaling mode can cause unsafe changes to
+		 * S_DAX if the inode is DAX
+		 */
+		if (IS_DAX(inode)) {
+			err = -EBUSY;
+			goto flags_out;
+		}
+
+		err = ext4_change_inode_journal_flag(inode,
+						     flags & EXT4_JOURNAL_DATA_FL);
+		if (err)
+			goto flags_out;
+	}
+	if (migrate) {
+		if (flags & EXT4_EXTENTS_FL)
+			err = ext4_ext_migrate(inode);
+		else
+			err = ext4_ind_migrate(inode);
+	}
+
+flags_out:
+	return err;
+}
+
+#ifdef CONFIG_QUOTA
+static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
+{
+	struct super_block *sb = inode->i_sb;
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	int err, rc;
+	handle_t *handle;
+	kprojid_t kprojid;
+	struct ext4_iloc iloc;
+	struct ext4_inode *raw_inode;
+	struct dquot *transfer_to[MAXQUOTAS] = { };
+
+	if (!ext4_has_feature_project(sb)) {
+		if (projid != EXT4_DEF_PROJID)
+			return -EOPNOTSUPP;
+		else
+			return 0;
+	}
+
+	if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
+		return -EOPNOTSUPP;
+
+	kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
+
+	if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
+		return 0;
+
+	err = -EPERM;
+	/* Is it quota file? Do not allow user to mess with it */
+	if (ext4_is_quota_file(inode))
+		return err;
+
+	err = dquot_initialize(inode);
+	if (err)
+		return err;
+
+	err = ext4_get_inode_loc(inode, &iloc);
+	if (err)
+		return err;
+
+	raw_inode = ext4_raw_inode(&iloc);
+	if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
+		err = ext4_expand_extra_isize(inode,
+					      EXT4_SB(sb)->s_want_extra_isize,
+					      &iloc);
+		if (err)
+			return err;
+	} else {
+		brelse(iloc.bh);
+	}
+
+	handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
+		EXT4_QUOTA_INIT_BLOCKS(sb) +
+		EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
+	if (IS_ERR(handle))
+		return PTR_ERR(handle);
+
+	err = ext4_reserve_inode_write(handle, inode, &iloc);
+	if (err)
+		goto out_stop;
+
+	transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
+	if (!IS_ERR(transfer_to[PRJQUOTA])) {
+
+		/* __dquot_transfer() calls back ext4_get_inode_usage() which
+		 * counts xattr inode references.
+		 */
+		down_read(&EXT4_I(inode)->xattr_sem);
+		err = __dquot_transfer(inode, transfer_to);
+		up_read(&EXT4_I(inode)->xattr_sem);
+		dqput(transfer_to[PRJQUOTA]);
+		if (err)
+			goto out_dirty;
+	}
+
+	EXT4_I(inode)->i_projid = kprojid;
+	inode_set_ctime_current(inode);
+	inode_inc_iversion(inode);
+out_dirty:
+	rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
+	if (!err)
+		err = rc;
+out_stop:
+	ext4_journal_stop(handle);
+	return err;
+}
+#else
+static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
+{
+	if (projid != EXT4_DEF_PROJID)
+		return -EOPNOTSUPP;
+	return 0;
+}
+#endif
+
+int ext4_force_shutdown(struct super_block *sb, u32 flags)
+{
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	int ret;
+
+	if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
+		return -EINVAL;
+
+	if (ext4_forced_shutdown(sb))
+		return 0;
+
+	ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
+	trace_ext4_shutdown(sb, flags);
+
+	switch (flags) {
+	case EXT4_GOING_FLAGS_DEFAULT:
+		ret = freeze_bdev(sb->s_bdev);
+		if (ret)
+			return ret;
+		set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+		thaw_bdev(sb->s_bdev);
+		break;
+	case EXT4_GOING_FLAGS_LOGFLUSH:
+		set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+		if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
+			(void) ext4_force_commit(sb);
+			jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
+		}
+		break;
+	case EXT4_GOING_FLAGS_NOLOGFLUSH:
+		set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+		if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
+			jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
+		break;
+	default:
+		return -EINVAL;
+	}
+	clear_opt(sb, DISCARD);
+	return 0;
+}
+
+static int ext4_ioctl_shutdown(struct super_block *sb, unsigned long arg)
+{
+	u32 flags;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (get_user(flags, (__u32 __user *)arg))
+		return -EFAULT;
+
+	return ext4_force_shutdown(sb, flags);
+}
+
+struct getfsmap_info {
+	struct super_block	*gi_sb;
+	struct fsmap_head __user *gi_data;
+	unsigned int		gi_idx;
+	__u32			gi_last_flags;
+};
+
+static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
+{
+	struct getfsmap_info *info = priv;
+	struct fsmap fm;
+
+	trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
+
+	info->gi_last_flags = xfm->fmr_flags;
+	ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
+	if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
+			sizeof(struct fsmap)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int ext4_ioc_getfsmap(struct super_block *sb,
+			     struct fsmap_head __user *arg)
+{
+	struct getfsmap_info info = { NULL };
+	struct ext4_fsmap_head xhead = {0};
+	struct fsmap_head head;
+	bool aborted = false;
+	int error;
+
+	if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
+		return -EFAULT;
+	if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
+	    memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
+		       sizeof(head.fmh_keys[0].fmr_reserved)) ||
+	    memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
+		       sizeof(head.fmh_keys[1].fmr_reserved)))
+		return -EINVAL;
+	/*
+	 * ext4 doesn't report file extents at all, so the only valid
+	 * file offsets are the magic ones (all zeroes or all ones).
+	 */
+	if (head.fmh_keys[0].fmr_offset ||
+	    (head.fmh_keys[1].fmr_offset != 0 &&
+	     head.fmh_keys[1].fmr_offset != -1ULL))
+		return -EINVAL;
+
+	xhead.fmh_iflags = head.fmh_iflags;
+	xhead.fmh_count = head.fmh_count;
+	ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
+	ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
+
+	trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
+	trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
+
+	info.gi_sb = sb;
+	info.gi_data = arg;
+	error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
+	if (error == EXT4_QUERY_RANGE_ABORT)
+		aborted = true;
+	else if (error)
+		return error;
+
+	/* If we didn't abort, set the "last" flag in the last fmx */
+	if (!aborted && info.gi_idx) {
+		info.gi_last_flags |= FMR_OF_LAST;
+		if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
+				 &info.gi_last_flags,
+				 sizeof(info.gi_last_flags)))
+			return -EFAULT;
+	}
+
+	/* copy back header */
+	head.fmh_entries = xhead.fmh_entries;
+	head.fmh_oflags = xhead.fmh_oflags;
+	if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static long ext4_ioctl_group_add(struct file *file,
+				 struct ext4_new_group_data *input)
+{
+	struct super_block *sb = file_inode(file)->i_sb;
+	int err, err2=0;
+
+	err = ext4_resize_begin(sb);
+	if (err)
+		return err;
+
+	if (ext4_has_feature_bigalloc(sb)) {
+		ext4_msg(sb, KERN_ERR,
+			 "Online resizing not supported with bigalloc");
+		err = -EOPNOTSUPP;
+		goto group_add_out;
+	}
+
+	err = mnt_want_write_file(file);
+	if (err)
+		goto group_add_out;
+
+	err = ext4_group_add(sb, input);
+	if (EXT4_SB(sb)->s_journal) {
+		jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+		err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
+		jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+	}
+	if (err == 0)
+		err = err2;
+	mnt_drop_write_file(file);
+	if (!err && ext4_has_group_desc_csum(sb) &&
+	    test_opt(sb, INIT_INODE_TABLE))
+		err = ext4_register_li_request(sb, input->group);
+group_add_out:
+	err2 = ext4_resize_end(sb, false);
+	if (err == 0)
+		err = err2;
+	return err;
+}
+
+int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa)
+{
+	struct inode *inode = d_inode(dentry);
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
+
+	if (S_ISREG(inode->i_mode))
+		flags &= ~FS_PROJINHERIT_FL;
+
+	fileattr_fill_flags(fa, flags);
+	if (ext4_has_feature_project(inode->i_sb))
+		fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
+
+	return 0;
+}
+
+int ext4_fileattr_set(struct mnt_idmap *idmap,
+		      struct dentry *dentry, struct fileattr *fa)
+{
+	struct inode *inode = d_inode(dentry);
+	u32 flags = fa->flags;
+	int err = -EOPNOTSUPP;
+
+	if (flags & ~EXT4_FL_USER_VISIBLE)
+		goto out;
+
+	/*
+	 * chattr(1) grabs flags via GETFLAGS, modifies the result and
+	 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
+	 * more restrictive than just silently masking off visible but
+	 * not settable flags as we always did.
+	 */
+	flags &= EXT4_FL_USER_MODIFIABLE;
+	if (ext4_mask_flags(inode->i_mode, flags) != flags)
+		goto out;
+	err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
+	if (err)
+		goto out;
+	err = ext4_ioctl_setflags(inode, flags);
+	if (err)
+		goto out;
+	err = ext4_ioctl_setproject(inode, fa->fsx_projid);
+out:
+	return err;
+}
+
+/* So that the fiemap access checks can't overflow on 32 bit machines. */
+#define FIEMAP_MAX_EXTENTS	(UINT_MAX / sizeof(struct fiemap_extent))
+
+static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
+{
+	struct fiemap fiemap;
+	struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
+	struct fiemap_extent_info fieinfo = { 0, };
+	struct inode *inode = file_inode(filp);
+	int error;
+
+	if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
+		return -EFAULT;
+
+	if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
+		return -EINVAL;
+
+	fieinfo.fi_flags = fiemap.fm_flags;
+	fieinfo.fi_extents_max = fiemap.fm_extent_count;
+	fieinfo.fi_extents_start = ufiemap->fm_extents;
+
+	error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
+			fiemap.fm_length);
+	fiemap.fm_flags = fieinfo.fi_flags;
+	fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
+	if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
+		error = -EFAULT;
+
+	return error;
+}
+
+static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
+{
+	int err = 0;
+	__u32 flags = 0;
+	unsigned int flush_flags = 0;
+	struct super_block *sb = file_inode(filp)->i_sb;
+
+	if (copy_from_user(&flags, (__u32 __user *)arg,
+				sizeof(__u32)))
+		return -EFAULT;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	/* check for invalid bits set */
+	if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
+				((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
+				(flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
+		return -EINVAL;
+
+	if (!EXT4_SB(sb)->s_journal)
+		return -ENODEV;
+
+	if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
+	    !bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev))
+		return -EOPNOTSUPP;
+
+	if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
+		return 0;
+
+	if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
+		flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
+
+	if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
+		flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
+		pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
+	}
+
+	jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+	err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
+	jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+
+	return err;
+}
+
+static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label)
+{
+	size_t len;
+	int ret = 0;
+	char new_label[EXT4_LABEL_MAX + 1];
+	struct super_block *sb = file_inode(filp)->i_sb;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	/*
+	 * Copy the maximum length allowed for ext4 label with one more to
+	 * find the required terminating null byte in order to test the
+	 * label length. The on disk label doesn't need to be null terminated.
+	 */
+	if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1))
+		return -EFAULT;
+
+	len = strnlen(new_label, EXT4_LABEL_MAX + 1);
+	if (len > EXT4_LABEL_MAX)
+		return -EINVAL;
+
+	/*
+	 * Clear the buffer after the new label
+	 */
+	memset(new_label + len, 0, EXT4_LABEL_MAX - len);
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label);
+
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label)
+{
+	char label[EXT4_LABEL_MAX + 1];
+
+	/*
+	 * EXT4_LABEL_MAX must always be smaller than FSLABEL_MAX because
+	 * FSLABEL_MAX must include terminating null byte, while s_volume_name
+	 * does not have to.
+	 */
+	BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX);
+
+	memset(label, 0, sizeof(label));
+	lock_buffer(sbi->s_sbh);
+	strncpy(label, sbi->s_es->s_volume_name, EXT4_LABEL_MAX);
+	unlock_buffer(sbi->s_sbh);
+
+	if (copy_to_user(user_label, label, sizeof(label)))
+		return -EFAULT;
+	return 0;
+}
+
+static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi,
+			struct fsuuid __user *ufsuuid)
+{
+	struct fsuuid fsuuid;
+	__u8 uuid[UUID_SIZE];
+
+	if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
+		return -EFAULT;
+
+	if (fsuuid.fsu_len == 0) {
+		fsuuid.fsu_len = UUID_SIZE;
+		if (copy_to_user(&ufsuuid->fsu_len, &fsuuid.fsu_len,
+					sizeof(fsuuid.fsu_len)))
+			return -EFAULT;
+		return 0;
+	}
+
+	if (fsuuid.fsu_len < UUID_SIZE || fsuuid.fsu_flags != 0)
+		return -EINVAL;
+
+	lock_buffer(sbi->s_sbh);
+	memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE);
+	unlock_buffer(sbi->s_sbh);
+
+	fsuuid.fsu_len = UUID_SIZE;
+	if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid)) ||
+	    copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE))
+		return -EFAULT;
+	return 0;
+}
+
+static int ext4_ioctl_setuuid(struct file *filp,
+			const struct fsuuid __user *ufsuuid)
+{
+	int ret = 0;
+	struct super_block *sb = file_inode(filp)->i_sb;
+	struct fsuuid fsuuid;
+	__u8 uuid[UUID_SIZE];
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	/*
+	 * If any checksums (group descriptors or metadata) are being used
+	 * then the checksum seed feature is required to change the UUID.
+	 */
+	if (((ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb))
+			&& !ext4_has_feature_csum_seed(sb))
+		|| ext4_has_feature_stable_inodes(sb))
+		return -EOPNOTSUPP;
+
+	if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
+		return -EFAULT;
+
+	if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0)
+		return -EINVAL;
+
+	if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE))
+		return -EFAULT;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid);
+	mnt_drop_write_file(filp);
+
+	return ret;
+}
+
+static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct super_block *sb = inode->i_sb;
+	struct mnt_idmap *idmap = file_mnt_idmap(filp);
+
+	ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
+
+	switch (cmd) {
+	case FS_IOC_GETFSMAP:
+		return ext4_ioc_getfsmap(sb, (void __user *)arg);
+	case EXT4_IOC_GETVERSION:
+	case EXT4_IOC_GETVERSION_OLD:
+		return put_user(inode->i_generation, (int __user *) arg);
+	case EXT4_IOC_SETVERSION:
+	case EXT4_IOC_SETVERSION_OLD: {
+		handle_t *handle;
+		struct ext4_iloc iloc;
+		__u32 generation;
+		int err;
+
+		if (!inode_owner_or_capable(idmap, inode))
+			return -EPERM;
+
+		if (ext4_has_metadata_csum(inode->i_sb)) {
+			ext4_warning(sb, "Setting inode version is not "
+				     "supported with metadata_csum enabled.");
+			return -ENOTTY;
+		}
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			return err;
+		if (get_user(generation, (int __user *) arg)) {
+			err = -EFAULT;
+			goto setversion_out;
+		}
+
+		inode_lock(inode);
+		handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
+		if (IS_ERR(handle)) {
+			err = PTR_ERR(handle);
+			goto unlock_out;
+		}
+		err = ext4_reserve_inode_write(handle, inode, &iloc);
+		if (err == 0) {
+			inode_set_ctime_current(inode);
+			inode_inc_iversion(inode);
+			inode->i_generation = generation;
+			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
+		}
+		ext4_journal_stop(handle);
+
+unlock_out:
+		inode_unlock(inode);
+setversion_out:
+		mnt_drop_write_file(filp);
+		return err;
+	}
+	case EXT4_IOC_GROUP_EXTEND: {
+		ext4_fsblk_t n_blocks_count;
+		int err, err2=0;
+
+		err = ext4_resize_begin(sb);
+		if (err)
+			return err;
+
+		if (get_user(n_blocks_count, (__u32 __user *)arg)) {
+			err = -EFAULT;
+			goto group_extend_out;
+		}
+
+		if (ext4_has_feature_bigalloc(sb)) {
+			ext4_msg(sb, KERN_ERR,
+				 "Online resizing not supported with bigalloc");
+			err = -EOPNOTSUPP;
+			goto group_extend_out;
+		}
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			goto group_extend_out;
+
+		err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
+		if (EXT4_SB(sb)->s_journal) {
+			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
+			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+		}
+		if (err == 0)
+			err = err2;
+		mnt_drop_write_file(filp);
+group_extend_out:
+		err2 = ext4_resize_end(sb, false);
+		if (err == 0)
+			err = err2;
+		return err;
+	}
+
+	case EXT4_IOC_MOVE_EXT: {
+		struct move_extent me;
+		struct fd donor;
+		int err;
+
+		if (!(filp->f_mode & FMODE_READ) ||
+		    !(filp->f_mode & FMODE_WRITE))
+			return -EBADF;
+
+		if (copy_from_user(&me,
+			(struct move_extent __user *)arg, sizeof(me)))
+			return -EFAULT;
+		me.moved_len = 0;
+
+		donor = fdget(me.donor_fd);
+		if (!donor.file)
+			return -EBADF;
+
+		if (!(donor.file->f_mode & FMODE_WRITE)) {
+			err = -EBADF;
+			goto mext_out;
+		}
+
+		if (ext4_has_feature_bigalloc(sb)) {
+			ext4_msg(sb, KERN_ERR,
+				 "Online defrag not supported with bigalloc");
+			err = -EOPNOTSUPP;
+			goto mext_out;
+		} else if (IS_DAX(inode)) {
+			ext4_msg(sb, KERN_ERR,
+				 "Online defrag not supported with DAX");
+			err = -EOPNOTSUPP;
+			goto mext_out;
+		}
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			goto mext_out;
+
+		err = ext4_move_extents(filp, donor.file, me.orig_start,
+					me.donor_start, me.len, &me.moved_len);
+		mnt_drop_write_file(filp);
+
+		if (copy_to_user((struct move_extent __user *)arg,
+				 &me, sizeof(me)))
+			err = -EFAULT;
+mext_out:
+		fdput(donor);
+		return err;
+	}
+
+	case EXT4_IOC_GROUP_ADD: {
+		struct ext4_new_group_data input;
+
+		if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
+				sizeof(input)))
+			return -EFAULT;
+
+		return ext4_ioctl_group_add(filp, &input);
+	}
+
+	case EXT4_IOC_MIGRATE:
+	{
+		int err;
+		if (!inode_owner_or_capable(idmap, inode))
+			return -EACCES;
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			return err;
+		/*
+		 * inode_mutex prevent write and truncate on the file.
+		 * Read still goes through. We take i_data_sem in
+		 * ext4_ext_swap_inode_data before we switch the
+		 * inode format to prevent read.
+		 */
+		inode_lock((inode));
+		err = ext4_ext_migrate(inode);
+		inode_unlock((inode));
+		mnt_drop_write_file(filp);
+		return err;
+	}
+
+	case EXT4_IOC_ALLOC_DA_BLKS:
+	{
+		int err;
+		if (!inode_owner_or_capable(idmap, inode))
+			return -EACCES;
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			return err;
+		err = ext4_alloc_da_blocks(inode);
+		mnt_drop_write_file(filp);
+		return err;
+	}
+
+	case EXT4_IOC_SWAP_BOOT:
+	{
+		int err;
+		if (!(filp->f_mode & FMODE_WRITE))
+			return -EBADF;
+		err = mnt_want_write_file(filp);
+		if (err)
+			return err;
+		err = swap_inode_boot_loader(sb, idmap, inode);
+		mnt_drop_write_file(filp);
+		return err;
+	}
+
+	case EXT4_IOC_RESIZE_FS: {
+		ext4_fsblk_t n_blocks_count;
+		int err = 0, err2 = 0;
+		ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
+
+		if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
+				   sizeof(__u64))) {
+			return -EFAULT;
+		}
+
+		err = ext4_resize_begin(sb);
+		if (err)
+			return err;
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			goto resizefs_out;
+
+		err = ext4_resize_fs(sb, n_blocks_count);
+		if (EXT4_SB(sb)->s_journal) {
+			ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL);
+			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
+			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+		}
+		if (err == 0)
+			err = err2;
+		mnt_drop_write_file(filp);
+		if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
+		    ext4_has_group_desc_csum(sb) &&
+		    test_opt(sb, INIT_INODE_TABLE))
+			err = ext4_register_li_request(sb, o_group);
+
+resizefs_out:
+		err2 = ext4_resize_end(sb, true);
+		if (err == 0)
+			err = err2;
+		return err;
+	}
+
+	case FITRIM:
+	{
+		struct fstrim_range range;
+		int ret = 0;
+
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+
+		if (!bdev_max_discard_sectors(sb->s_bdev))
+			return -EOPNOTSUPP;
+
+		/*
+		 * We haven't replayed the journal, so we cannot use our
+		 * block-bitmap-guided storage zapping commands.
+		 */
+		if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
+			return -EROFS;
+
+		if (copy_from_user(&range, (struct fstrim_range __user *)arg,
+		    sizeof(range)))
+			return -EFAULT;
+
+		ret = ext4_trim_fs(sb, &range);
+		if (ret < 0)
+			return ret;
+
+		if (copy_to_user((struct fstrim_range __user *)arg, &range,
+		    sizeof(range)))
+			return -EFAULT;
+
+		return 0;
+	}
+	case EXT4_IOC_PRECACHE_EXTENTS:
+		return ext4_ext_precache(inode);
+
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
+
+	case FS_IOC_GET_ENCRYPTION_PWSALT:
+		return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg);
+
+	case FS_IOC_GET_ENCRYPTION_POLICY:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
+
+	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
+
+	case FS_IOC_ADD_ENCRYPTION_KEY:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_add_key(filp, (void __user *)arg);
+
+	case FS_IOC_REMOVE_ENCRYPTION_KEY:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
+
+	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_remove_key_all_users(filp,
+							  (void __user *)arg);
+	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
+
+	case FS_IOC_GET_ENCRYPTION_NONCE:
+		if (!ext4_has_feature_encrypt(sb))
+			return -EOPNOTSUPP;
+		return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
+
+	case EXT4_IOC_CLEAR_ES_CACHE:
+	{
+		if (!inode_owner_or_capable(idmap, inode))
+			return -EACCES;
+		ext4_clear_inode_es(inode);
+		return 0;
+	}
+
+	case EXT4_IOC_GETSTATE:
+	{
+		__u32	state = 0;
+
+		if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
+			state |= EXT4_STATE_FLAG_EXT_PRECACHED;
+		if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
+			state |= EXT4_STATE_FLAG_NEW;
+		if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
+			state |= EXT4_STATE_FLAG_NEWENTRY;
+		if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
+			state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
+
+		return put_user(state, (__u32 __user *) arg);
+	}
+
+	case EXT4_IOC_GET_ES_CACHE:
+		return ext4_ioctl_get_es_cache(filp, arg);
+
+	case EXT4_IOC_SHUTDOWN:
+		return ext4_ioctl_shutdown(sb, arg);
+
+	case FS_IOC_ENABLE_VERITY:
+		if (!ext4_has_feature_verity(sb))
+			return -EOPNOTSUPP;
+		return fsverity_ioctl_enable(filp, (const void __user *)arg);
+
+	case FS_IOC_MEASURE_VERITY:
+		if (!ext4_has_feature_verity(sb))
+			return -EOPNOTSUPP;
+		return fsverity_ioctl_measure(filp, (void __user *)arg);
+
+	case FS_IOC_READ_VERITY_METADATA:
+		if (!ext4_has_feature_verity(sb))
+			return -EOPNOTSUPP;
+		return fsverity_ioctl_read_metadata(filp,
+						    (const void __user *)arg);
+
+	case EXT4_IOC_CHECKPOINT:
+		return ext4_ioctl_checkpoint(filp, arg);
+
+	case FS_IOC_GETFSLABEL:
+		return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg);
+
+	case FS_IOC_SETFSLABEL:
+		return ext4_ioctl_setlabel(filp,
+					   (const void __user *)arg);
+
+	case EXT4_IOC_GETFSUUID:
+		return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg);
+	case EXT4_IOC_SETFSUUID:
+		return ext4_ioctl_setuuid(filp, (const void __user *)arg);
+	default:
+		return -ENOTTY;
+	}
+}
+
+long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	return __ext4_ioctl(filp, cmd, arg);
+}
+
+#ifdef CONFIG_COMPAT
+long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	/* These are just misnamed, they actually get/put from/to user an int */
+	switch (cmd) {
+	case EXT4_IOC32_GETVERSION:
+		cmd = EXT4_IOC_GETVERSION;
+		break;
+	case EXT4_IOC32_SETVERSION:
+		cmd = EXT4_IOC_SETVERSION;
+		break;
+	case EXT4_IOC32_GROUP_EXTEND:
+		cmd = EXT4_IOC_GROUP_EXTEND;
+		break;
+	case EXT4_IOC32_GETVERSION_OLD:
+		cmd = EXT4_IOC_GETVERSION_OLD;
+		break;
+	case EXT4_IOC32_SETVERSION_OLD:
+		cmd = EXT4_IOC_SETVERSION_OLD;
+		break;
+	case EXT4_IOC32_GETRSVSZ:
+		cmd = EXT4_IOC_GETRSVSZ;
+		break;
+	case EXT4_IOC32_SETRSVSZ:
+		cmd = EXT4_IOC_SETRSVSZ;
+		break;
+	case EXT4_IOC32_GROUP_ADD: {
+		struct compat_ext4_new_group_input __user *uinput;
+		struct ext4_new_group_data input;
+		int err;
+
+		uinput = compat_ptr(arg);
+		err = get_user(input.group, &uinput->group);
+		err |= get_user(input.block_bitmap, &uinput->block_bitmap);
+		err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
+		err |= get_user(input.inode_table, &uinput->inode_table);
+		err |= get_user(input.blocks_count, &uinput->blocks_count);
+		err |= get_user(input.reserved_blocks,
+				&uinput->reserved_blocks);
+		if (err)
+			return -EFAULT;
+		return ext4_ioctl_group_add(file, &input);
+	}
+	case EXT4_IOC_MOVE_EXT:
+	case EXT4_IOC_RESIZE_FS:
+	case FITRIM:
+	case EXT4_IOC_PRECACHE_EXTENTS:
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_PWSALT:
+	case FS_IOC_GET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
+	case FS_IOC_ADD_ENCRYPTION_KEY:
+	case FS_IOC_REMOVE_ENCRYPTION_KEY:
+	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
+	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
+	case FS_IOC_GET_ENCRYPTION_NONCE:
+	case EXT4_IOC_SHUTDOWN:
+	case FS_IOC_GETFSMAP:
+	case FS_IOC_ENABLE_VERITY:
+	case FS_IOC_MEASURE_VERITY:
+	case FS_IOC_READ_VERITY_METADATA:
+	case EXT4_IOC_CLEAR_ES_CACHE:
+	case EXT4_IOC_GETSTATE:
+	case EXT4_IOC_GET_ES_CACHE:
+	case EXT4_IOC_CHECKPOINT:
+	case FS_IOC_GETFSLABEL:
+	case FS_IOC_SETFSLABEL:
+	case EXT4_IOC_GETFSUUID:
+	case EXT4_IOC_SETFSUUID:
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
+}
+#endif
+
+static void set_overhead(struct ext4_super_block *es, const void *arg)
+{
+	es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg));
+}
+
+int ext4_update_overhead(struct super_block *sb, bool force)
+{
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+	if (sb_rdonly(sb))
+		return 0;
+	if (!force &&
+	    (sbi->s_overhead == 0 ||
+	     sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters)))
+		return 0;
+	return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead);
+}