util: log all setting of MAC addresses and vlan tags

Having this information available will make it easier to determine the
culprit when MAC or vlan tag appear to not be set, eg.:

  https://bugzilla.redhat.com/1364073

(This patch doesn't fix that bug, just makes it easier to diagnose)

diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 2c97a9ec10a59a93bd4e2430cc6293750fb86cdc..598d1c61a8c040fd19f190d4312d5a8c33e123d6 100644 (file)
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -241,6 +241,7 @@ virNetDevSetMACInternal(const char *ifname,
     int fd = -1;
     int ret = -1;
     struct ifreq ifr;
+    char macstr[VIR_MAC_STRING_BUFLEN];
 
     if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
         return -1;
@@ -256,7 +257,6 @@ virNetDevSetMACInternal(const char *ifname,
     virMacAddrGetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
 
     if (ioctl(fd, SIOCSIFHWADDR, &ifr) < 0) {
-        char macstr[VIR_MAC_STRING_BUFLEN];
 
         if (quiet && errno == EADDRNOTAVAIL)
             goto cleanup;
@@ -270,6 +270,10 @@ virNetDevSetMACInternal(const char *ifname,
     ret = 0;
 
  cleanup:
+    VIR_DEBUG("SIOCSIFHWADDR %s MAC=%s - %s",
+              ifname, virMacAddrFormat(macaddr, macstr),
+              ret < 0 ? "Fail" : "Success");
+
     VIR_FORCE_CLOSE(fd);
     return ret;
 }
@@ -312,6 +316,9 @@ virNetDevSetMACInternal(const char *ifname,
 
         ret = 0;
  cleanup:
+        VIR_DEBUG("SIOCSIFLLADDR %s MAC=%s - %s", ifname, mac + 1),
+                  ret < 0 ? "Fail" : "Success");
+
         VIR_FORCE_CLOSE(s);
 
         return ret;
@@ -1508,6 +1515,7 @@ virNetDevSetVfConfig(const char *ifname, int vf,
                      bool *allowRetry)
 {
     int rc = -1;
+    char macstr[VIR_MAC_STRING_BUFLEN];
     struct nlmsghdr *resp = NULL;
     struct nlmsgerr *err;
     unsigned int recvbuflen = 0;
@@ -1591,8 +1599,6 @@ virNetDevSetVfConfig(const char *ifname, int vf,
             goto cleanup;
         } else if (err->error) {
             /* other errors are permanent */
-            char macstr[VIR_MAC_STRING_BUFLEN];
-
             virReportSystemError(-err->error,
                                  _("Cannot set interface MAC/vlanid to %s/%d "
                                    "for ifname %s vf %d"),
@@ -1616,6 +1622,11 @@ virNetDevSetVfConfig(const char *ifname, int vf,
 
     rc = 0;
  cleanup:
+    VIR_DEBUG("RTM_SETLINK %s vf %d MAC=%s vlanid=%d - %s",
+              ifname, vf,
+              macaddr ? virMacAddrFormat(macaddr, macstr) : "(unchanged)",
+              vlanid, rc < 0 ? "Fail" : "Success");
+
     nlmsg_free(nl_msg);
     VIR_FREE(resp);
     return rc;