util: Functions for getting/setting device options

This patch provides the utility functions needed to synchronize
the rxfilter changes made to a guest domain with the corresponding
macvtap devices on the host:

* Get/set PROMISC flag
* Get/set ALLMULTI, MULTICAST

Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

src/libvirt_private.syms

@@ -1647,13 +1647,16 @@ virNetDevGetIPv4Address;
 virNetDevGetLinkInfo;
 virNetDevGetMAC;
 virNetDevGetMTU;
+virNetDevGetOnline;
 virNetDevGetPhysicalFunction;
+virNetDevGetPromiscuous;
+virNetDevGetRcvAllMulti;
+virNetDevGetRcvMulti;
 virNetDevGetRxFilter;
 virNetDevGetVirtualFunctionIndex;
 virNetDevGetVirtualFunctionInfo;
 virNetDevGetVirtualFunctions;
 virNetDevGetVLanID;
-virNetDevIsOnline;
 virNetDevIsVirtualFunction;
 virNetDevLinkDump;
 virNetDevReplaceMacAddress;
@@ -1671,6 +1674,9 @@ virNetDevSetMTUFromDevice;
 virNetDevSetName;
 virNetDevSetNamespace;
 virNetDevSetOnline;
+virNetDevSetPromiscuous;
+virNetDevSetRcvAllMulti;
+virNetDevSetRcvMulti;
 virNetDevSetupControl;
 virNetDevValidateConfig;
 

src/util/virnetdev.c

@@ -610,17 +610,7 @@ int virNetDevSetName(const char* ifname, const char *newifname)
 
 
 #if defined(SIOCSIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
-/**
+int virNetDevSetIFFlag(const char *ifname, int flag, bool val)
- * virNetDevSetOnline:
- * @ifname: the interface name
- * @online: true for up, false for down
- *
- * Function to control if an interface is activated (up, true) or not (down, false)
- *
- * Returns 0 in case of success or -1 on error.
- */
-int virNetDevSetOnline(const char *ifname,
-                       bool online)
 {
     int fd = -1;
     int ret = -1;
@@ -637,10 +627,10 @@ int virNetDevSetOnline(const char *ifname,
         goto cleanup;
     }
 
-    if (online)
+    if (val)
-        ifflags = ifr.ifr_flags | IFF_UP;
+        ifflags = ifr.ifr_flags | flag;
     else
-        ifflags = ifr.ifr_flags & ~IFF_UP;
+        ifflags = ifr.ifr_flags & ~flag;
 
     if (ifr.ifr_flags != ifflags) {
         ifr.ifr_flags = ifflags;
@@ -659,8 +649,9 @@ int virNetDevSetOnline(const char *ifname,
     return ret;
 }
 #else
-int virNetDevSetOnline(const char *ifname,
+int virNetDevSetIFFlag(const char *ifname,
-                       bool online ATTRIBUTE_UNUSED)
+                       int flag ATTRIBUTE_UNUSED,
+                       bool val ATTRIBUTE_UNUSED)
 {
     virReportSystemError(ENOSYS,
                          _("Cannot set interface flags on '%s'"),
@@ -670,18 +661,77 @@ int virNetDevSetOnline(const char *ifname,
 #endif
 
 
-#if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
+
 /**
- * virNetDevIsOnline:
+ * virNetDevSetOnline:
  * @ifname: the interface name
- * @online: where to store the status
+ * @online: true for up, false for down
  *
- * Function to query if an interface is activated (true) or not (false)
+ * Function to control if an interface is activated (up, true) or not (down, false)
  *
- * Returns 0 in case of success or an errno code in case of failure.
+ * Returns 0 in case of success or -1 on error.
  */
-int virNetDevIsOnline(const char *ifname,
+int virNetDevSetOnline(const char *ifname,
-                      bool *online)
+                       bool online)
+{
+
+    return virNetDevSetIFFlag(ifname, IFF_UP, online);
+}
+
+/**
+ * virNetDevSetPromiscuous:
+ * @ifname: the interface name
+ * @promiscuous: true for receive all packets, false for do not receive
+ *               all packets
+ *
+ * Function to control if an interface is to receive all
+ * packets (receive all, true) or not (do not receive all, false)
+ *
+ * Returns 0 in case of success or -1 on error.
+ */
+int virNetDevSetPromiscuous(const char *ifname,
+                            bool promiscuous)
+{
+    return virNetDevSetIFFlag(ifname, IFF_PROMISC, promiscuous);
+}
+
+/**
+ * virNetDevSetRcvMulti:
+ * @ifname: the interface name
+ * @:receive true for receive multicast packets, false for do not receive
+ *           multicast packets
+ *
+ * Function to control if an interface is to receive multicast
+ * packets in which it is interested (receive, true)
+ * or not (do not receive, false)
+ *
+ * Returns 0 in case of success or -1 on error.
+ */
+int virNetDevSetRcvMulti(const char *ifname,
+                         bool receive)
+{
+    return virNetDevSetIFFlag(ifname, IFF_MULTICAST, receive);
+}
+
+/**
+ * virNetDevSetRcvAllMulti:
+ * @ifname: the interface name
+ * @:receive true for receive all packets, false for do not receive all packets
+ *
+ * Function to control if an interface is to receive all multicast
+ * packets (receive, true) or not (do not receive, false)
+ *
+ * Returns 0 in case of success or -1 on error.
+ */
+int virNetDevSetRcvAllMulti(const char *ifname,
+                            bool receive)
+{
+    return virNetDevSetIFFlag(ifname, IFF_ALLMULTI, receive);
+}
+
+
+#if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
+int virNetDevGetIFFlag(const char *ifname, int flag, bool *val)
 {
     int fd = -1;
     int ret = -1;
@@ -697,7 +747,7 @@ int virNetDevIsOnline(const char *ifname,
         goto cleanup;
     }
 
-    *online = (ifr.ifr_flags & IFF_UP) ? true : false;
+    *val = (ifr.ifr_flags & flag) ? true : false;
     ret = 0;
 
  cleanup:
@@ -705,8 +755,9 @@ int virNetDevIsOnline(const char *ifname,
     return ret;
 }
 #else
-int virNetDevIsOnline(const char *ifname,
+int virNetDevGetIFFlag(const char *ifname,
-                      bool *online ATTRIBUTE_UNUSED)
+                       int flag ATTRIBUTE_UNUSED,
+                       bool *val ATTRIBUTE_UNUSED)
 {
     virReportSystemError(ENOSYS,
                          _("Cannot get interface flags on '%s'"),
@@ -716,6 +767,70 @@ int virNetDevIsOnline(const char *ifname,
 #endif
 
 
+/**
+ * virNetDevGetOnline:
+ * @ifname: the interface name
+ * @online: where to store the status
+ *
+ * Function to query if an interface is activated (true) or not (false)
+ *
+ * Returns 0 in case of success or an errno code in case of failure.
+ */
+int virNetDevGetOnline(const char *ifname,
+                       bool *online)
+{
+    return virNetDevGetIFFlag(ifname, IFF_UP, online);
+}
+
+/**
+ * virNetDevIsPromiscuous:
+ * @ifname: the interface name
+ * @promiscuous: where to store the status
+ *
+ * Function to query if an interface is receiving all packets (true) or
+ * not (false)
+ *
+ * Returns 0 in case of success or an errno code in case of failure.
+ */
+int virNetDevGetPromiscuous(const char *ifname,
+                           bool *promiscuous)
+{
+    return virNetDevGetIFFlag(ifname, IFF_PROMISC, promiscuous);
+}
+
+/**
+ * virNetDevIsRcvMulti:
+ * @ifname: the interface name
+ * @receive where to store the status
+ *
+ * Function to query whether an interface is receiving multicast packets (true)
+ * in which it is interested, or not (false)
+ *
+ * Returns 0 in case of success or -1 on error.
+ */
+int virNetDevGetRcvMulti(const char *ifname,
+                        bool *receive)
+{
+    return virNetDevGetIFFlag(ifname, IFF_MULTICAST, receive);
+}
+
+/**
+ * virNetDevIsRcvAllMulti:
+ * @ifname: the interface name
+ * @:receive where to store the status
+ *
+ * Function to query whether an interface is receiving all multicast
+ * packets (receiving, true) or not (is not receiving, false)
+ *
+ * Returns 0 in case of success or -1 on error.
+ */
+int virNetDevGetRcvAllMulti(const char *ifname,
+                           bool *receive)
+{
+    return virNetDevGetIFFlag(ifname, IFF_ALLMULTI, receive);
+}
+
+
 /**
  * virNetDevGetIndex:
  * @ifname : Name of the interface whose index is to be found
@@ -2549,6 +2664,7 @@ int virNetDevGetRxFilter(const char *ifname,
                          virNetDevRxFilterPtr *filter)
 {
     int ret = -1;
+    bool receive;
     virNetDevRxFilterPtr fil = virNetDevRxFilterNew();
 
     if (!fil)
@@ -2560,6 +2676,24 @@ int virNetDevGetRxFilter(const char *ifname,
     if (virNetDevGetMulticastTable(ifname, fil))
         goto cleanup;
 
+    if (virNetDevGetPromiscuous(ifname, &fil->promiscuous))
+        goto cleanup;
+
+    if (virNetDevGetRcvAllMulti(ifname, &receive))
+        goto cleanup;
+
+    if (receive) {
+        fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_ALL;
+    } else {
+        if (virNetDevGetRcvMulti(ifname, &receive))
+            goto cleanup;
+
+        if (receive)
+            fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_NORMAL;
+        else
+            fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_NONE;
+    }
+
     ret = 0;
  cleanup:
     if (ret < 0) {

src/util/virnetdev.h

@@ -83,7 +83,7 @@ int virNetDevExists(const char *brname)
 int virNetDevSetOnline(const char *ifname,
                        bool online)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
-int virNetDevIsOnline(const char *ifname,
+int virNetDevGetOnline(const char *ifname,
                       bool *online)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
 
@@ -200,4 +200,26 @@ int virNetDevDelMulti(const char *ifname,
                       virMacAddrPtr macaddr)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
 
+int virNetDevSetIFFlag(const char *ifname, int flag, bool val)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
+    ATTRIBUTE_RETURN_CHECK;
+
+int virNetDevGetIFFlag(const char *ifname, int flag, bool *val)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
+    ATTRIBUTE_RETURN_CHECK;
+
+int virNetDevSetPromiscuous(const char *ifname, bool promiscuous)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
+int virNetDevGetPromiscuous(const char *ifname, bool *promiscuous)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
+
+int virNetDevSetRcvMulti(const char *ifname, bool receive)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
+int virNetDevGetRcvMulti(const char *ifname, bool *receive)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
+
+int virNetDevSetRcvAllMulti(const char *ifname, bool receive)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
+int virNetDevGetRcvAllMulti(const char *ifname, bool *receive)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
 #endif /* __VIR_NETDEV_H__ */