From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Tue, 18 Dec 2018 19:01:08 +0000 (-0500)
Subject: Fix: error logged on partial recvmsg() in MSG_DONTWAIT
X-Git-Tag: v2.12.0-rc1~680
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=c2e8c3663b99ba900f4733696c70e7a5e32ae1a7;hp=c2e8c3663b99ba900f4733696c70e7a5e32ae1a7;p=lttng-tools.git

Fix: error logged on partial recvmsg() in MSG_DONTWAIT

The relay daemon logs a "Resource temporarily unavailable" error
message when the lttcomm_recvmsg_inet_sock() is invoked and
no data is left to be consumed from the lttcomm_sock.

The "recvmsg" socket operation is called in a loop by the relay
daemon to consume the data being received in 64k chunks. If, on
one of those iterations, 0 bytes are available, recvmsg() will
return an error (-1, errno = EAGAIN). This should not be
logged in non-blocking mode.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
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