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encoded_write

btrfs_uapi::receive

Function encoded_write 

Source 
pub fn encoded_write(
    fd: BorrowedFd<'_>,
    data: &[u8],
    offset: u64,
    unencoded_file_len: u64,
    unencoded_len: u64,
    unencoded_offset: u64,
    compression: u32,
    encryption: u32,
) -> Result<()>
Expand description

Write pre-compressed data to a file using BTRFS_IOC_ENCODED_WRITE.

This passes compressed data directly to the filesystem without decompression, which is more efficient than decompressing and writing. The kernel may reject the call with ENOTTY (old kernel), EINVAL (unsupported parameters), or ENOSPC; callers should fall back to manual decompression + pwrite in those cases.