From: "Daniel P. Berrangé" <berrange@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Aleksey Kuleshov" <rndfax@yandex.ru>,
"Daniel P. Berrangé" <berrange@redhat.com>
Subject: [Qemu-devel] [PATCH v1] chardev: fix handling of EAGAIN for TCP chardev
Date: Thu, 22 Feb 2018 12:13:51 +0000 [thread overview]
Message-ID: <20180222121351.26191-1-berrange@redhat.com> (raw)
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>
---
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 bdd6cff5f6..b15682c362 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -449,7 +449,7 @@ 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) {
--
2.14.3
next reply other threads:[~2018-02-22 12:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-22 12:13 Daniel P. Berrangé [this message]
2018-02-22 12:35 ` [Qemu-devel] [PATCH v1] chardev: fix handling of EAGAIN for TCP chardev Marc-André Lureau
2018-02-22 12:43 ` Aleksey Kuleshov
2018-03-12 14:22 ` Paolo Bonzini
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