ifcfg-rh: persist ipv4.dad-timeout without rounding

Introduce a new ifcfg-rh variable ACD_TIMEOUT that stores the exact
value of ipv4.dad-timeout without rounding. We still write the
initscripts-compatible ARPING_WAIT variable, and read it when
ACD_TIMEOUT is missing.

libnm-core/nm-setting-ip4-config.c

@@ -748,11 +748,12 @@ nm_setting_ip4_config_class_init (NMSettingIP4ConfigClass *ip4_class)
 
 	/* ---ifcfg-rh---
 	 * property: dad-timeout
-	 * variable: ARPING_WAIT
+	 * variable: ACD_TIMEOUT, ARPING_WAIT
 	 * default: missing variable means global default (config override or 3)
-	 * description: Timeout (in seconds) for performing DAD before configuring
-	 * IPv4 addresses. 0 turns off the DAD completely, -1 means default value.
-	 * example: ARPING_WAIT=2
+	 * description: Timeout (in milliseconds for ACD_TIMEOUT or in seconds
+	 *   for ARPING_WAIT) for address conflict detection before configuring
+	 *   IPv4 addresses. 0 turns off the ACD completely, -1 means default value.
+	 * example: ACD_TIMEOUT=2000 or ARPING_WAIT=2
 	 * ---end---
 	 */
 

src/settings/plugins/ifcfg-rh/nms-ifcfg-rh-reader.c

@@ -1555,10 +1555,14 @@ make_ip4_setting (shvarFile *ifcfg,
 		}
 	}
 
-	timeout = svGetValueInt64 (ifcfg, "ARPING_WAIT", 10, -1,
-	                           NM_SETTING_IP_CONFIG_DAD_TIMEOUT_MAX / 1000, -1);
-	g_object_set (s_ip4, NM_SETTING_IP_CONFIG_DAD_TIMEOUT,
-	              (gint) (timeout <= 0 ? timeout : timeout * 1000), NULL);
+	timeout = svGetValueInt64 (ifcfg, "ACD_TIMEOUT", 10, -1, NM_SETTING_IP_CONFIG_DAD_TIMEOUT_MAX, -2);
+	if (timeout == -2) {
+		timeout = svGetValueInt64 (ifcfg, "ARPING_WAIT", 10, -1,
+		                           NM_SETTING_IP_CONFIG_DAD_TIMEOUT_MAX / 1000, -1);
+		if (timeout > 0)
+			timeout *= 1000;
+	}
+	g_object_set (s_ip4, NM_SETTING_IP_CONFIG_DAD_TIMEOUT, (gint) timeout, NULL);
 
 	return g_steal_pointer (&s_ip4);
 }

src/settings/plugins/ifcfg-rh/nms-ifcfg-rh-writer.c

@@ -2417,12 +2417,15 @@ write_ip4_setting (NMConnection *connection,
 	NM_SET_OUT (out_route_content, write_route_file (s_ip4));
 
 	timeout = nm_setting_ip_config_get_dad_timeout (s_ip4);
-	if (timeout < 0)
+	if (timeout < 0) {
+		svUnsetValue (ifcfg, "ACD_TIMEOUT");
 		svUnsetValue (ifcfg, "ARPING_WAIT");
-	else if (timeout == 0)
+	} else if (timeout == 0) {
+		svSetValueStr (ifcfg, "ACD_TIMEOUT", "0");
 		svSetValueStr (ifcfg, "ARPING_WAIT", "0");
-	else {
-		/* Round the value up to next integer */
+	} else {
+		svSetValueInt64 (ifcfg, "ACD_TIMEOUT", timeout);
+		/* Round the value up to next integer for initscripts */
 		svSetValueInt64 (ifcfg, "ARPING_WAIT", (timeout - 1) / 1000 + 1);
 	}
 

src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-Test_Write_Wired_Static_Routes.cexpected

@@ -14,6 +14,8 @@ DNS2=4.2.2.2
 DOMAIN="foobar.com lab.foobar.com"
 DEFROUTE=yes
 IPV4_FAILURE_FATAL=no
+ACD_TIMEOUT=400
+ARPING_WAIT=1
 IPV6INIT=no
 NAME="Test Write Wired Static Routes"
 UUID=${UUID}

src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-wired-ipv4-manual-1

@@ -10,3 +10,5 @@ PREFIX1=16
 IPADDR2=3.3.3.3
 PREFIX2=8
 GATEWAY=1.1.1.1
+ACD_TIMEOUT=2000
+ARPING_WAIT=1

src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-wired-ipv4-manual-2

@@ -9,3 +9,5 @@ IPADDR2=9.8.7.6
 PREFIX2=16
 IPADDR3=3.3.3.3
 PREFIX3=8
+ACD_TIMEOUT=2000
+ARPING_WAIT=1

src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-wired-ipv4-manual-3

@@ -9,3 +9,5 @@ IPADDR3=9.8.7.6
 PREFIX3=16
 IPADDR4=3.3.3.3
 PREFIX4=8
+ACD_TIMEOUT=2000
+ARPING_WAIT=1

src/settings/plugins/ifcfg-rh/tests/network-scripts/ifcfg-test-wired-ipv4-manual-4

@@ -9,3 +9,5 @@ IPADDR1=9.8.7.6
 PREFIX1=16
 IPADDR2=3.3.3.3
 PREFIX2=8
+ACD_TIMEOUT=2000
+ARPING_WAIT=1

src/settings/plugins/ifcfg-rh/tests/test-ifcfg-rh.c

@@ -1473,6 +1473,7 @@ test_read_wired_ipv4_manual (gconstpointer data)
 	s_ip4 = nm_connection_get_setting_ip4_config (connection);
 	g_assert (s_ip4);
 	g_assert_cmpstr (nm_setting_ip_config_get_method (s_ip4), ==, NM_SETTING_IP4_CONFIG_METHOD_MANUAL);
+	g_assert_cmpint (nm_setting_ip_config_get_dad_timeout (s_ip4), ==, 2000);
 
 	/* IP addresses */
 	g_assert_cmpint (nm_setting_ip_config_get_num_addresses (s_ip4), ==, 3);
@@ -4764,6 +4765,7 @@ test_write_wired_static_routes (void)
 	g_object_set (s_ip4,
 	              NM_SETTING_IP_CONFIG_METHOD, NM_SETTING_IP4_CONFIG_METHOD_MANUAL,
 	              NM_SETTING_IP_CONFIG_GATEWAY, "1.1.1.1",
+	              NM_SETTING_IP_CONFIG_DAD_TIMEOUT, 400,
 	              NULL);
 
 	addr = nm_ip_address_new (AF_INET, "1.1.1.3", 24, &error);