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#ifndef DUPE_IOCTL
#define DUPE_IOCTL
#include <linux/fs.h>
#ifndef FIDEDUPERANGE
/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
#define FILE_DEDUPE_RANGE_SAME 0
#define FILE_DEDUPE_RANGE_DIFFERS 1
/* from struct btrfs_ioctl_file_extent_same_info */
struct file_dedupe_range_info {
__s64 dest_fd; /* in - destination file */
__u64 dest_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
* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
* == FILE_DEDUPE_RANGE_DIFFERS if data differs
*/
__s32 status; /* out - see above description */
__u32 reserved; /* must be zero */
};
/* from struct btrfs_ioctl_file_extent_same_args */
struct file_dedupe_range {
__u64 src_offset; /* in - start of extent in source */
__u64 src_length; /* in - length of extent */
__u16 dest_count; /* in - total elements in info array */
__u16 reserved1; /* must be zero */
__u32 reserved2; /* must be zero */
struct file_dedupe_range_info info[0];
};
#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)
#endif // FIDEDUPERANGE
#endif
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