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ext4: split ext4_shutdown

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Split ext4_shutdown into a low-level helper that will be reused for
implementing the shutdown super operation and a wrapper for the ioctl
handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Link: https://lore.kernel.org/r/20230601094459.1350643-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-06-01 11:44:57 +02:00 committed by Jens Axboe
parent 8067ca1dcd
commit 97524b454b
2 changed files with 16 additions and 9 deletions
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1
fs/ext4/ext4.h
View File

@ -2965,6 +2965,7 @@ int ext4_fileattr_set(struct mnt_idmap *idmap,
int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa);
extern void ext4_reset_inode_seed(struct inode *inode);
int ext4_update_overhead(struct super_block *sb, bool force);
int ext4_force_shutdown(struct super_block *sb, u32 flags);
/* migrate.c */
extern int ext4_ext_migrate(struct inode *);

24
fs/ext4/ioctl.c
View File

@ -793,16 +793,9 @@ static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
}
#endif
static int ext4_shutdown(struct super_block *sb, unsigned long arg)
int ext4_force_shutdown(struct super_block *sb, u32 flags)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
__u32 flags;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(flags, (__u32 __user *)arg))
return -EFAULT;
if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
return -EINVAL;
@ -838,6 +831,19 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg)
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;
@ -1566,7 +1572,7 @@ resizefs_out:
return ext4_ioctl_get_es_cache(filp, arg);
case EXT4_IOC_SHUTDOWN:
return ext4_shutdown(sb, arg);
return ext4_ioctl_shutdown(sb, arg);
case FS_IOC_ENABLE_VERITY:
if (!ext4_has_feature_verity(sb))