btrfs-extent-same - Man Page

btrfs-extent-same extent-len file1 offset1 file2 offset2 [...]

btrfs-extent-same is a wrapper around the FIDEDUPRANGE ioctl. extent-len and all offsets should be specified in bytes.

• filesystems(5)
• btrfs(8)
• ioctl_fideduprange(2)
• xfs_io(8)