[import-netapp] import Netapp code into Garage codebase

src/net/error.rs

@@ -0,0 +1,126 @@
+use std::io;
+
+use err_derive::Error;
+use log::error;
+
+#[derive(Debug, Error)]
+pub enum Error {
+	#[error(display = "IO error: {}", _0)]
+	Io(#[error(source)] io::Error),
+
+	#[error(display = "Messagepack encode error: {}", _0)]
+	RMPEncode(#[error(source)] rmp_serde::encode::Error),
+	#[error(display = "Messagepack decode error: {}", _0)]
+	RMPDecode(#[error(source)] rmp_serde::decode::Error),
+
+	#[error(display = "Tokio join error: {}", _0)]
+	TokioJoin(#[error(source)] tokio::task::JoinError),
+
+	#[error(display = "oneshot receive error: {}", _0)]
+	OneshotRecv(#[error(source)] tokio::sync::oneshot::error::RecvError),
+
+	#[error(display = "Handshake error: {}", _0)]
+	Handshake(#[error(source)] kuska_handshake::async_std::Error),
+
+	#[error(display = "UTF8 error: {}", _0)]
+	UTF8(#[error(source)] std::string::FromUtf8Error),
+
+	#[error(display = "Framing protocol error")]
+	Framing,
+
+	#[error(display = "Remote error ({:?}): {}", _0, _1)]
+	Remote(io::ErrorKind, String),
+
+	#[error(display = "Request ID collision")]
+	IdCollision,
+
+	#[error(display = "{}", _0)]
+	Message(String),
+
+	#[error(display = "No handler / shutting down")]
+	NoHandler,
+
+	#[error(display = "Connection closed")]
+	ConnectionClosed,
+
+	#[error(display = "Version mismatch: {}", _0)]
+	VersionMismatch(String),
+}
+
+impl<T> From<tokio::sync::watch::error::SendError<T>> for Error {
+	fn from(_e: tokio::sync::watch::error::SendError<T>) -> Error {
+		Error::Message("Watch send error".into())
+	}
+}
+
+impl<T> From<tokio::sync::mpsc::error::SendError<T>> for Error {
+	fn from(_e: tokio::sync::mpsc::error::SendError<T>) -> Error {
+		Error::Message("MPSC send error".into())
+	}
+}
+
+/// Ths trait adds a `.log_err()` method on `Result<(), E>` types,
+/// which dismisses the error by logging it to stderr.
+pub trait LogError {
+	fn log_err(self, msg: &'static str);
+}
+
+impl<E> LogError for Result<(), E>
+where
+	E: Into<Error>,
+{
+	fn log_err(self, msg: &'static str) {
+		if let Err(e) = self {
+			error!("Error: {}: {}", msg, Into::<Error>::into(e));
+		};
+	}
+}
+
+impl<E, T> LogError for Result<T, E>
+where
+	T: LogError,
+	E: Into<Error>,
+{
+	fn log_err(self, msg: &'static str) {
+		match self {
+			Err(e) => error!("Error: {}: {}", msg, Into::<Error>::into(e)),
+			Ok(x) => x.log_err(msg),
+		}
+	}
+}
+
+// ---- Helpers for serializing I/O Errors
+
+pub(crate) fn u8_to_io_errorkind(v: u8) -> std::io::ErrorKind {
+	use std::io::ErrorKind;
+	match v {
+		101 => ErrorKind::ConnectionAborted,
+		102 => ErrorKind::BrokenPipe,
+		103 => ErrorKind::WouldBlock,
+		104 => ErrorKind::InvalidInput,
+		105 => ErrorKind::InvalidData,
+		106 => ErrorKind::TimedOut,
+		107 => ErrorKind::Interrupted,
+		108 => ErrorKind::UnexpectedEof,
+		109 => ErrorKind::OutOfMemory,
+		110 => ErrorKind::ConnectionReset,
+		_ => ErrorKind::Other,
+	}
+}
+
+pub(crate) fn io_errorkind_to_u8(kind: std::io::ErrorKind) -> u8 {
+	use std::io::ErrorKind;
+	match kind {
+		ErrorKind::ConnectionAborted => 101,
+		ErrorKind::BrokenPipe => 102,
+		ErrorKind::WouldBlock => 103,
+		ErrorKind::InvalidInput => 104,
+		ErrorKind::InvalidData => 105,
+		ErrorKind::TimedOut => 106,
+		ErrorKind::Interrupted => 107,
+		ErrorKind::UnexpectedEof => 108,
+		ErrorKind::OutOfMemory => 109,
+		ErrorKind::ConnectionReset => 110,
+		_ => 100,
+	}
+}