[PATCH v2 16/27] network: turn on auto-rollback for the rules added for virtual networks

[Laine Stump <laine@xxxxxxxxxx>]

So far this will only affect what happens if there is some failure
while applying the firewall rules; the rollback rules aren't yet
persistent beyond that time. More work is needed to remember the
rollback rules while the network is active, and use those rules to
remove the firewall for the network when it is destroyed.

Signed-off-by: Laine Stump <laine@xxxxxxxxxx>
---
 src/network/network_iptables.c  | 15 +++------------
 tests/networkxml2firewalltest.c |  9 ++++++++-
 2 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/src/network/network_iptables.c b/src/network/network_iptables.c
index db35a4c5a0..467d43c1e9 100644
--- a/src/network/network_iptables.c
+++ b/src/network/network_iptables.c
@@ -1599,7 +1599,7 @@ iptablesAddFirewallRules(virNetworkDef *def)
     virNetworkIPDef *ipdef;
     g_autoptr(virFirewall) fw = virFirewallNew(VIR_FIREWALL_BACKEND_IPTABLES);
 
-    virFirewallStartTransaction(fw, 0);
+    virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK);
 
     iptablesAddGeneralFirewallRules(fw, def);
 
@@ -1610,17 +1610,8 @@ iptablesAddFirewallRules(virNetworkDef *def)
             return -1;
     }
 
-    virFirewallStartRollback(fw, 0);
-
-    for (i = 0;
-         (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i));
-         i++) {
-        if (iptablesRemoveIPSpecificFirewallRules(fw, def, ipdef) < 0)
-            return -1;
-    }
-    iptablesRemoveGeneralFirewallRules(fw, def);
-
-    virFirewallStartTransaction(fw, VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS);
+    virFirewallStartTransaction(fw, (VIR_FIREWALL_TRANSACTION_IGNORE_ERRORS |
+                                     VIR_FIREWALL_TRANSACTION_AUTO_ROLLBACK));
     iptablesAddChecksumFirewallRules(fw, def);
 
     return virFirewallApply(fw);
diff --git a/tests/networkxml2firewalltest.c b/tests/networkxml2firewalltest.c
index 3a9f409e2a..e61787daec 100644
--- a/tests/networkxml2firewalltest.c
+++ b/tests/networkxml2firewalltest.c
@@ -79,7 +79,14 @@ testCommandDryRun(const char *const*args G_GNUC_UNUSED,
                   void *opaque G_GNUC_UNUSED)
 {
     *status = 0;
-    *output = g_strdup("");
+    /* if arg[1] is -ae then this is an nft command,
+     * and the caller requested to get the handle
+     * of the newly added object in stdout
+     */
+    if (STREQ_NULLABLE(args[1], "-ae"))
+        *output = g_strdup("# handle 5309");
+    else
+        *output = g_strdup("");
     *error = g_strdup("");
 }
 
-- 
2.44.0
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