ext4: Add new superblock fields reserved for the Next3 snapshot feature

	__u8	s_reserved_char_pad2;

	__le16  s_reserved_pad;

	__le64	s_kbytes_written;	/* nr of lifetime kilobytes written */

	__u32   s_reserved[160];        /* Padding to the end of the block */

	__le32	s_snapshot_inum;	/* Inode number of active snapshot */

	__le32	s_snapshot_id;		/* sequential ID of active snapshot */

	__le64	s_snapshot_r_blocks_count; /* reserved blocks for active

					      snapshot's future use */

	__le32	s_snapshot_list;	/* inode number of the head of the

					   on-disk snapshot list */

	__u32   s_reserved[155];        /* Padding to the end of the block */

};

#ifdef __KERNEL__