[libvirt] [PATCHv2 3/7] util: define virNetDevRxFilter and basic utility functions

[Laine Stump]

This same structure will be used to retrieve RX filter info for
interfaces on the host via netlink messages, and RX filter info for
interfaces on the guest via the qemu "query-rx-filter" command.
---

changes from V1:

* use a single enum virNetDevRxFilterMode, instead of 3 separate enums
  for vlan, multicast, and unicast.


 src/libvirt_private.syms |  4 ++++
 src/util/virnetdev.c     | 31 +++++++++++++++++++++++++++++++
 src/util/virnetdev.h     | 42 +++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 76 insertions(+), 1 deletion(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 8d8342f..d6265ac 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1615,6 +1615,10 @@ virNetDevReplaceMacAddress;
 virNetDevReplaceNetConfig;
 virNetDevRestoreMacAddress;
 virNetDevRestoreNetConfig;
+virNetDevRxFilterFree;
+virNetDevRxFilterModeTypeFromString;
+virNetDevRxFilterModeTypeToString;
+virNetDevRxFilterNew;
 virNetDevSetIPv4Address;
 virNetDevSetMAC;
 virNetDevSetMTU;
diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 8815e18..db5623a 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -1932,3 +1932,34 @@ virNetDevGetLinkInfo(const char *ifname,
     return 0;
 }
 #endif /* defined(__linux__) */
+
+
+VIR_ENUM_IMPL(virNetDevRxFilterMode,
+              VIR_NETDEV_RX_FILTER_MODE_LAST,
+              "none",
+              "normal",
+              "all");
+
+
+virNetDevRxFilterPtr
+virNetDevRxFilterNew(void)
+{
+    virNetDevRxFilterPtr filter;
+
+    if (VIR_ALLOC(filter) < 0)
+        return NULL;
+    return filter;
+}
+
+
+void
+virNetDevRxFilterFree(virNetDevRxFilterPtr filter)
+{
+    if (filter) {
+        VIR_FREE(filter->name);
+        VIR_FREE(filter->unicast.table);
+        VIR_FREE(filter->multicast.table);
+        VIR_FREE(filter->vlan.table);
+        VIR_FREE(filter);
+    }
+}
diff --git a/src/util/virnetdev.h b/src/util/virnetdev.h
index 69e365e..2a6e67d 100644
--- a/src/util/virnetdev.h
+++ b/src/util/virnetdev.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2013 Red Hat, Inc.
+ * Copyright (C) 2007-2014 Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -37,6 +37,42 @@ typedef struct ifreq virIfreq;
 typedef void virIfreq;
 # endif
 
+typedef enum {
+   VIR_NETDEV_RX_FILTER_MODE_NONE = 0,
+   VIR_NETDEV_RX_FILTER_MODE_NORMAL,
+   VIR_NETDEV_RX_FILTER_MODE_ALL,
+
+   VIR_NETDEV_RX_FILTER_MODE_LAST
+} virNetDevRxFilterMode;
+VIR_ENUM_DECL(virNetDevRxFilterMode)
+
+typedef struct _virNetDevRxFilter virNetDevRxFilter;
+typedef virNetDevRxFilter *virNetDevRxFilterPtr;
+struct _virNetDevRxFilter {
+    char *name; /* the alias used by qemu, *not* name used by guest */
+    virMacAddr mac;
+    bool promiscuous;
+    bool broadcastAllowed;
+
+    struct {
+        int mode; /* enum virNetDevRxFilterMode */
+        bool overflow;
+        virMacAddrPtr table;
+        size_t nTable;
+    } unicast;
+    struct {
+        int mode; /* enum virNetDevRxFilterMode */
+        bool overflow;
+        virMacAddrPtr table;
+        size_t nTable;
+    } multicast;
+    struct {
+        int mode; /* enum virNetDevRxFilterMode */
+        unsigned int *table;
+        size_t nTable;
+    } vlan;
+};
+
 int virNetDevSetupControl(const char *ifname,
                           virIfreq *ifr)
     ATTRIBUTE_RETURN_CHECK;
@@ -150,4 +186,8 @@ int virNetDevGetLinkInfo(const char *ifname,
                          virInterfaceLinkPtr lnk)
     ATTRIBUTE_NONNULL(1);
 
+virNetDevRxFilterPtr virNetDevRxFilterNew(void)
+   ATTRIBUTE_RETURN_CHECK;
+void virNetDevRxFilterFree(virNetDevRxFilterPtr filter);
+
 #endif /* __VIR_NETDEV_H__ */
-- 
1.9.3