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util: query/set BR_ISOLATED flag on netdevs attached to bridge

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When this flag is set for an interface attached to a bridge, traffic
to/from the specified interface can only enter/exit the bridge via
another attached interface that *doesn't* have the BR_ISOLATED flag
set. This can be used to permit guests to communicate with the rest of
the network, but not with each other.

Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Laine Stump 2020-01-20 16:27:02 -05:00
parent 3f8b57a61f
commit a378d8fa55
3 changed files with 57 additions and 0 deletions
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2
src/libvirt_private.syms
View File

@ -2554,8 +2554,10 @@ virNetDevBridgeFDBDel;
virNetDevBridgeGetSTP;
virNetDevBridgeGetSTPDelay;
virNetDevBridgeGetVlanFiltering;
virNetDevBridgePortGetIsolated;
virNetDevBridgePortGetLearning;
virNetDevBridgePortGetUnicastFlood;
virNetDevBridgePortSetIsolated;
virNetDevBridgePortSetLearning;
virNetDevBridgePortSetUnicastFlood;
virNetDevBridgeRemovePort;

46
src/util/virnetdevbridge.c
View File

@ -311,6 +311,30 @@ virNetDevBridgePortSetUnicastFlood(const char *brname,
}
int
virNetDevBridgePortGetIsolated(const char *brname,
const char *ifname,
bool *enable)
{
unsigned long value;
if (virNetDevBridgePortGet(brname, ifname, "isolated", &value) < 0)
return -1;
*enable = !!value;
return 0;
}
int
virNetDevBridgePortSetIsolated(const char *brname,
const char *ifname,
bool enable)
{
return virNetDevBridgePortSet(brname, ifname, "isolated", enable ? 1 : 0);
}
#else
int
virNetDevBridgePortGetLearning(const char *brname G_GNUC_UNUSED,
@ -354,6 +378,28 @@ virNetDevBridgePortSetUnicastFlood(const char *brname G_GNUC_UNUSED,
_("Unable to set bridge port unicast_flood on this platform"));
return -1;
}
int
virNetDevBridgePortGetIsolated(const char *brname G_GNUC_UNUSED,
const char *ifname G_GNUC_UNUSED,
bool *enable G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get bridge port isolated on this platform"));
return -1;
}
int
virNetDevBridgePortSetIsolated(const char *brname G_GNUC_UNUSED,
const char *ifname G_GNUC_UNUSED,
bool enable G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to set bridge port isolated on this platform"));
return -1;
}
#endif

9
src/util/virnetdevbridge.h
View File

@ -73,6 +73,15 @@ int virNetDevBridgePortSetUnicastFlood(const char *brname,
const char *ifname,
bool enable)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) G_GNUC_WARN_UNUSED_RESULT;
int virNetDevBridgePortGetIsolated(const char *brname,
const char *ifname,
bool *enable)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
G_GNUC_WARN_UNUSED_RESULT;
int virNetDevBridgePortSetIsolated(const char *brname,
const char *ifname,
bool enable)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) G_GNUC_WARN_UNUSED_RESULT;
typedef enum {
VIR_NETDEVBRIDGE_FDB_FLAG_ROUTER = (1 << 0),