On Wed, Aug 26, 2015 at 04:16:42PM +0800, Peng Tao wrote:
> +struct file_clone_range {
> + __s64 src_fd;
> + __u64 src_offset;
> + __u64 src_length;
> + __u64 dest_offset;
> +};
Might be a good idea to add some spare bytes to the structure.
> struct fstrim_range {
> __u64 start;
> __u64 len;
> @@ -159,6 +166,8 @@ struct inodes_stat_t {
> #define FIFREEZE _IOWR('X', 119, int) /* Freeze */
> #define FITHAW _IOWR('X', 120, int) /* Thaw */
> #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
> +#define FICLONE _IOW(0x94, 9, int) /* Clone */
> +#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) /* Clone range */
FICLONE is a special case of FICLONERANGE. The whole file clone had come
historically first and then was refined, I don't think this needs to be
copied to the generic API. A zeroed file_clone_range is simple to use
for that purpose.
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