> +/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
> +#define XFS_EXTENT_DATA_SAME 0
> +#define XFS_EXTENT_DATA_DIFFERS 1
> +
> +/* from struct btrfs_ioctl_file_extent_same_info */
> +struct xfs_extent_data_info {
> + __s64 fd; /* in - destination file */
> + __u64 logical_offset; /* in - start of extent in destination */
> + __u64 bytes_deduped; /* out - total # of bytes we were able
> + * to dedupe from this file */
> + /* status of this dedupe operation:
> + * < 0 for error
> + * == XFS_EXTENT_DATA_SAME if dedupe succeeds
> + * == XFS_EXTENT_DATA_DIFFERS if data differs
> + */
> + __s32 status; /* out - see above description */
> + __u32 reserved;
> +};
> +
> +/* from struct btrfs_ioctl_file_extent_same_args */
> +struct xfs_extent_data {
> + __u64 logical_offset; /* in - start of extent in source */
> + __u64 length; /* in - length of extent */
> + __u16 dest_count; /* in - total elements in info array */
> + __u16 reserved1;
> + __u32 reserved2;
> + struct xfs_extent_data_info info[0];
> +};
> +
> #define XFS_IOC_CLONE _IOW (0x94, 9, int)
> #define XFS_IOC_CLONE_RANGE _IOW (0x94, 13, struct xfs_clone_args)
> +#define XFS_IOC_FILE_EXTENT_SAME _IOWR(0x94, 54, struct xfs_extent_data)
Same as with the last patch: we use VFS defintions for these, no need
to add duplicate and unused XFS versions.
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