Revert "network: support setting firewalld zone for bridge device of open networks"

This reverts commit 1a72b83d566df952033529001b0f88a66d7f4393. That
patch had made the incorrect assumption that the firewalld zone of a
bridge would not be changed/removed when firewalld reloaded its rules
(e.g. with "killall -HUP firewalld"). It turns out my memory was
faulty, and this *does* remove the bridge interface's zone, which
results in guest networking failure after a firewalld reload, until
the virtual network is restarted.

The functionality reverted as a result of this patch reversion will be
added back in an upcoming patch that keeps the zone setting in
networkAddFirewallRules() (rather than moving it into a separate
function) so that it is called every time the network's firewall rules
are reloaded (including the reload that happens in response to a
reload notification from firewalld).

Signed-off-by: Laine Stump
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>

src/network/bridge_driver.c

@@ -1999,10 +1999,6 @@ networkStartNetworkVirtual(virNetworkDriverState *driver,
     if (networkSetIPv6Sysctls(obj) < 0)
         goto error;
 
-    /* set the firewall zone for the bridge device on the host */
-    if (networkSetBridgeZone(def) < 0)
-        goto error;
-
     /* Add "once per network" rules */
     if (def->forward.type != VIR_NETWORK_FORWARD_OPEN &&
         networkAddFirewallRules(def, cfg->firewallBackend, &fwRemoval) < 0) {

src/network/bridge_driver_linux.c

@@ -333,8 +333,28 @@ int networkCheckRouteCollision(virNetworkDef *def)
 
 
 int
-networkSetBridgeZone(virNetworkDef *def)
+networkAddFirewallRules(virNetworkDef *def,
+                        virFirewallBackend firewallBackend,
+                        virFirewall **fwRemoval)
 {
+
+    networkSetupPrivateChains(firewallBackend, false);
+
+    if (errInitV4 &&
+        (virNetworkDefGetIPByIndex(def, AF_INET, 0) ||
+         virNetworkDefGetRouteByIndex(def, AF_INET, 0))) {
+        virSetError(errInitV4);
+        return -1;
+    }
+
+    if (errInitV6 &&
+        (virNetworkDefGetIPByIndex(def, AF_INET6, 0) ||
+         virNetworkDefGetRouteByIndex(def, AF_INET6, 0) ||
+         def->ipv6nogw)) {
+        virSetError(errInitV6);
+        return -1;
+    }
+
     if (def->bridgeZone) {
 
         /* if a firewalld zone has been specified, fail/log an error
@@ -350,14 +370,12 @@ networkSetBridgeZone(virNetworkDef *def)
         if (virFirewallDInterfaceSetZone(def->bridge, def->bridgeZone) < 0)
             return -1;
 
-    } else if (def->forward.type != VIR_NETWORK_FORWARD_OPEN) {
+    } else {
 
-        /* if firewalld is active, try to set the "libvirt" zone by
-         * default (forward mode='open' networks have no zone set by
-         * default, but we honor it if one is specified). This is
-         * desirable (for consistency) if firewalld is using the
-         * iptables backend, but is necessary (for basic network
-         * connectivity) if firewalld is using the nftables backend
+        /* if firewalld is active, try to set the "libvirt" zone. This is
+         * desirable (for consistency) if firewalld is using the iptables
+         * backend, but is necessary (for basic network connectivity) if
+         * firewalld is using the nftables backend
          */
         if (virFirewallDIsRegistered() == 0) {
 
@@ -388,33 +406,6 @@ networkSetBridgeZone(virNetworkDef *def)
         }
     }
 
-    return 0;
-}
-
-
-int
-networkAddFirewallRules(virNetworkDef *def,
-                        virFirewallBackend firewallBackend,
-                        virFirewall **fwRemoval)
-{
-
-    networkSetupPrivateChains(firewallBackend, false);
-
-    if (errInitV4 &&
-        (virNetworkDefGetIPByIndex(def, AF_INET, 0) ||
-         virNetworkDefGetRouteByIndex(def, AF_INET, 0))) {
-        virSetError(errInitV4);
-        return -1;
-    }
-
-    if (errInitV6 &&
-        (virNetworkDefGetIPByIndex(def, AF_INET6, 0) ||
-         virNetworkDefGetRouteByIndex(def, AF_INET6, 0) ||
-         def->ipv6nogw)) {
-        virSetError(errInitV6);
-        return -1;
-    }
-
     switch (firewallBackend) {
     case VIR_FIREWALL_BACKEND_NONE:
         virReportError(VIR_ERR_NO_SUPPORT, "%s",

src/network/bridge_driver_nop.c

@@ -38,19 +38,6 @@ int networkCheckRouteCollision(virNetworkDef *def G_GNUC_UNUSED)
     return 0;
 }
 
-
-int
-networkSetBridgeZone(virNetworkDef *def)
-{
-    if (def->bridgeZone) {
-        virReportError(VIR_ERR_NO_SUPPORT, "%s",
-                       _("This platform does not support setting the bridge device zone"));
-        return -1;
-    }
-    return 0;
-}
-
-
 int networkAddFirewallRules(virNetworkDef *def G_GNUC_UNUSED,
                             virFirewallBackend firewallBackend,
                             virFirewall **fwRemoval G_GNUC_UNUSED)

src/network/bridge_driver_platform.h

@@ -32,8 +32,6 @@ void networkPostReloadFirewallRules(bool startup);
 
 int networkCheckRouteCollision(virNetworkDef *def);
 
-int networkSetBridgeZone(virNetworkDef *def);
-
 int networkAddFirewallRules(virNetworkDef *def,
                             virFirewallBackend firewallBackend,
                             virFirewall **fwRemoval);