Function write_inblob_with_retry

tdx-attest/src/linux.rs:403–435

(path: &str, data: &TdxReportData)

}

fn write_inblob_with_retry(path: &str, data: &TdxReportData) -> Result<()> {
    const RETRY_WAIT_MS: u64 = 10000; // 10 seconds
    const MAX_RETRIES: usize = 3;

    let mut last_err = None;
    for _ in 0..MAX_RETRIES {
        let mut file = match OpenOptions::new().write(true).open(path) {
            Ok(f) => f,
            Err(e) => {
                last_err = Some(e);
                continue;
            }
        };

        match file.write_all(data) {
            Ok(()) => return Ok(()),
            Err(e) => {
                if e.raw_os_error() == Some(libc::EBUSY) {
                    thread::sleep(Duration::from_millis(RETRY_WAIT_MS));
                    last_err = Some(e);
                    continue;
                }
                return Err(TdxAttestError::Unexpected(format!("write {path}: {e}")));
            }
        }
    }

    match last_err {
        Some(e) if e.raw_os_error() == Some(libc::EBUSY) => Err(TdxAttestError::Busy),
        Some(e) => Err(TdxAttestError::Unexpected(format!("write {path}: {e}"))),
        None => Err(TdxAttestError::Unexpected("unknown error".to_string())),
    }
}

fn wait_for_generation_change(path: &str, current: i64) -> Result<i64> {
    let deadline = Instant::now() + Duration::from_secs(CONFIGFS_GEN_WAIT_TIMEOUT_SECS);