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agent: don't do anything in Pipestream::shutdown

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The only right way to shutdown pipe is drop it
Otherwise PipeStream will conflict with its twins
Because they both have the same fd, and both registered.

Fixes: #1614

Signed-off-by: Tim Zhang <tim@hyper.sh>
This commit is contained in:
Tim Zhang 2021-04-01 21:54:33 +08:00
parent 5524bc806b
commit 4a2d437043
2 changed files with 9 additions and 18 deletions
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9
src/agent/rustjail/src/pipestream.rs
View File

@ -77,10 +77,6 @@ impl PipeStream {
Ok(Self(AsyncFd::new(StreamFd(fd))?)) Ok(Self(AsyncFd::new(StreamFd(fd))?))
} }
pub fn shutdown(&mut self) -> io::Result<()> {
self.0.get_mut().close()
}
pub fn from_fd(fd: RawFd) -> Self { pub fn from_fd(fd: RawFd) -> Self {
unsafe { Self::from_raw_fd(fd) } unsafe { Self::from_raw_fd(fd) }
} }
@ -164,7 +160,10 @@ impl AsyncWrite for PipeStream {
} }
fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<io::Result<()>> { fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<io::Result<()>> {
self.get_mut().shutdown()?; // Do nothing in shutdown is very important
// The only right way to shutdown pipe is drop it
// Otherwise PipeStream will conflict with its twins
// Because they both have same fd, and both registered.
Poll::Ready(Ok(())) Poll::Ready(Ok(()))
} }
} }

18
src/agent/rustjail/src/sync_with_async.rs
View File

@ -117,28 +117,20 @@ pub async fn write_async(pipe_w: &mut PipeStream, msg_type: i32, data_str: &str)
} }
match msg_type { match msg_type {
SYNC_FAILED => match write_count(pipe_w, data_str.as_bytes(), data_str.len()).await { SYNC_FAILED => {
Ok(_) => pipe_w.shutdown()?, if let Err(e) = write_count(pipe_w, data_str.as_bytes(), data_str.len()).await {
Err(e) => {
pipe_w.shutdown()?;
return Err(anyhow!(e).context("error in send message to process")); return Err(anyhow!(e).context("error in send message to process"));
} }
}, }
SYNC_DATA => { SYNC_DATA => {
let length: i32 = data_str.len() as i32; let length: i32 = data_str.len() as i32;
write_count(pipe_w, &length.to_be_bytes(), MSG_SIZE) write_count(pipe_w, &length.to_be_bytes(), MSG_SIZE)
.await .await
.or_else(|e| { .map_err(|e| anyhow!(e).context("error in send message to process"))?;
pipe_w.shutdown()?;
Err(anyhow!(e).context("error in send message to process"))
})?;
write_count(pipe_w, data_str.as_bytes(), data_str.len()) write_count(pipe_w, data_str.as_bytes(), data_str.len())
.await .await
.or_else(|e| { .map_err(|e| anyhow!(e).context("error in send message to process"))?;
pipe_w.shutdown()?;
Err(anyhow!(e).context("error in send message to process"))
})?;
} }
_ => (), _ => (),