[libvirt] [PATCH] macvtap: log an error if on failure to connect to netlink socket

A bug in libnl (see https://bugzilla.redhat.com/show_bug.cgi?id=677724 and https://bugzilla.redhat.com/show_bug.cgi?id=677725) makes it very easy to create a failure to connect to the netlink socket when trying to open a macvtap network device ("type='direct'" in domain interface XML). When that error occurred, there was no log message, leading virsh (for example) to report "unknown error". This patch logs a message which will hopefully be more useful. (All other error exits from the same function were already logging a message). --- src/util/macvtap.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/src/util/macvtap.c b/src/util/macvtap.c index a71db86..66bdc73 100644 --- a/src/util/macvtap.c +++ b/src/util/macvtap.c @@ -127,6 +127,8 @@ int nlComm(struct nl_msg *nl_msg, return -1; if (nl_connect(nlhandle, NETLINK_ROUTE) < 0) { + virReportSystemError(errno, + "%s", _("cannot connect to netlink socket")); rc = -1; goto err_exit; } -- 1.7.3.4