// 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,
ex
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