Switch logging to use tracing instead of log

Tracing has support for intervals and a great os_log integration.

tun/src/tokio/mod.rs

@@ -1,17 +1,21 @@
 use std::io;
 use tokio::io::unix::AsyncFd;
+use tracing::instrument;
 
+#[derive(Debug)]
 pub struct TunInterface {
     inner: AsyncFd<crate::TunInterface>,
 }
 
 impl TunInterface {
+    #[instrument]
     pub fn new(tun: crate::TunInterface) -> io::Result<Self> {
         Ok(Self {
             inner: AsyncFd::new(tun)?,
         })
     }
 
+    #[instrument]
     pub async fn write(&self, buf: &[u8]) -> io::Result<usize> {
         loop {
             let mut guard = self.inner.writable().await?;
@@ -22,6 +26,7 @@ impl TunInterface {
         }
     }
 
+    #[instrument]
     pub async fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
         loop {
             let mut guard = self.inner.readable_mut().await?;