From c863fdec6aff6b5a4ca8fff1537b80d9f8b97726 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
Date: Thu, 22 Feb 2018 12:13:51 +0000
Subject: [PATCH] chardev: fix handling of EAGAIN for TCP chardev
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When this commit was applied
commit 9894dc0cdcc397ee5b26370bc53da6d360a363c2
Author: Daniel P. Berrange <berrange@redhat.com>
Date: Tue Jan 19 11:14:29 2016 +0000
char: convert from GIOChannel to QIOChannel
The tcp_chr_recv() function was changed to return QIO_CHANNEL_ERR_BLOCK
which corresonds to -2. As such the handling for EAGAIN was able to be
removed from tcp_chr_read(). Unfortunately in a later commit:
commit b6572b4f97a7b126c7b24e165893ed9fe3d72e1f
Author: Marc-André Lureau <marcandre.lureau@redhat.com>
Date: Fri Mar 11 18:55:24 2016 +0100
char: translate from QIOChannel error to errno
The tcp_chr_recv() function was changed back to return -1, with errno
set to EAGAIN, without also re-addding support for this to tcp_chr_read()
Reported-by: Aleksey Kuleshov <rndfax@yandex.ru>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20180222121351.26191-1-berrange@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
chardev/char-socket.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index a220803c012..541fcf487df 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -450,7 +450,7 @@ static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
len = s->max_size;
}
size = tcp_chr_recv(chr, (void *)buf, len);
- if (size == 0 || size == -1) {
+ if (size == 0 || (size == -1 && errno != EAGAIN)) {
/* connection closed */
tcp_chr_disconnect(chr);
} else if (size > 0) {
--
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