pahole -C btrfs_ioctl_fs_info_args fs/btrfs/btrfs.ko
struct btrfs_ioctl_fs_info_args {
__u64 max_id; /* 0 8 */
__u64 num_devices; /* 8 8 */
__u8 fsid[16]; /* 16 16 */
__u32 nodesize; /* 32 4 */
__u32 sectorsize; /* 36 4 */
__u32 clone_alignment; /* 40 4 */
__u32 flags; /* 44 4 */
__u16 csum_type; /* 48 2 */
__u16 csum_size; /* 50 2 */
__u8 reserved[972]; /* 52 972 */
/* size: 1024, cachelines: 16, members: 10 */
};
Newer progs shall read the value of flags/csum_type/csum_size from the
updated kernel and zeros from the older kernel. Nice fix.
Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx>
Thanks.
