libceph: report socket read/write error message



We need to set error_msg to something useful before calling ceph_fault();
do so here for try_{read,write}().  This is more informative than

libceph: osd0 192.168.106.220:6801 (null)

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>

parent 546f04ef

net/ceph/messenger.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -2287,14 +2287,18 @@ static void con_work(struct work_struct *work)
		ret = try_read(con);
		if (ret == -EAGAIN)
		goto restart;
		if (ret < 0)
		if (ret < 0) {
		con->error_msg = "socket error on read";
		goto fault;
		}

		ret = try_write(con);
		if (ret == -EAGAIN)
		goto restart;
		if (ret < 0)
		if (ret < 0) {
		con->error_msg = "socket error on write";
		goto fault;
		}

		done:
		mutex_unlock(&con->mutex);