vnet tests: check for if_bridge.ko

A number of tests create a bridge, but did not check if if_bridge.ko is loaded.

We usually get away with that, because `ifconfig bridge create` autoloads the
module, but if we run the tests in a jail (e.g. because of kyua's upcoming
execenv.jail.params feature) we can't load the module and these tests can fail.

Check if the module is loaded, skip the test if it is not.

Reviewed by:	markj
MFC after:	1 week
Event:		Kitchener-Waterloo Hackathon 202406
Differential Revision:	https://reviews.freebsd.org/D45487

tests/sys/common/vnet.subr

@@ -26,6 +26,13 @@ vnet_mkepair()
 	echo ${ifname%a}
 }
 
+vnet_init_bridge()
+{
+	if ! kldstat -q -m if_bridge; then
+		atf_skip "This test requires if_bridge"
+	fi
+}
+
 vnet_mkbridge()
 {
 	ifname=$(ifconfig bridge create)

tests/sys/net/if_bridge_test.sh

@@ -39,6 +39,7 @@ bridge_transmit_ipv4_unicast_head()
 bridge_transmit_ipv4_unicast_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair_alcatraz=$(vnet_mkepair)
 	epair_singsing=$(vnet_mkepair)
@@ -76,6 +77,7 @@ stp_head()
 stp_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair_one=$(vnet_mkepair)
 	epair_two=$(vnet_mkepair)
@@ -142,6 +144,7 @@ stp_vlan_head()
 stp_vlan_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair_one=$(vnet_mkepair)
 	epair_two=$(vnet_mkepair)
@@ -216,6 +219,7 @@ static_head()
 static_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair=$(vnet_mkepair)
 	bridge=$(vnet_mkbridge)
@@ -273,6 +277,7 @@ span_head()
 span_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair=$(vnet_mkepair)
 	epair_span=$(vnet_mkepair)
@@ -326,6 +331,7 @@ delete_with_members_head()
 delete_with_members_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	epair=$(vnet_mkepair)
@@ -352,6 +358,7 @@ mac_conflict_head()
 mac_conflict_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair=$(vnet_mkepair)
 
@@ -390,6 +397,7 @@ inherit_mac_head()
 inherit_mac_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	epair=$(vnet_mkepair)
@@ -418,6 +426,7 @@ stp_validation_head()
 stp_validation_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair_one=$(vnet_mkepair)
 	epair_two=$(vnet_mkepair)
@@ -461,6 +470,7 @@ gif_head()
 gif_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair=$(vnet_mkepair)
 
@@ -545,6 +555,7 @@ check_mtu()
 mtu_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	epair=$(vnet_mkepair)
 	gif=$(ifconfig gif create)
@@ -606,6 +617,7 @@ vlan_head()
 vlan_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	vid=1
 
@@ -673,6 +685,7 @@ many_bridge_members_head()
 many_bridge_members_body()
 {
 	vnet_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	ifcount=256

tests/sys/net/if_ovpn/if_ovpn.sh

@@ -602,6 +602,7 @@ multi_client_head()
 multi_client_body()
 {
 	ovpn_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	srv=$(vnet_mkepair)
@@ -814,6 +815,7 @@ ra_head()
 ra_body()
 {
 	ovpn_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	srv=$(vnet_mkepair)

tests/sys/netinet/carp.sh

@@ -71,6 +71,7 @@ basic_v4_head()
 basic_v4_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	epair_one=$(vnet_mkepair)
@@ -115,6 +116,7 @@ vrrp_v4_head()
 vrrp_v4_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	j=vrrp_basic_v4
 
@@ -161,6 +163,7 @@ unicast_v4_head()
 unicast_v4_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	epair_one=$(vnet_mkepair)
@@ -218,6 +221,7 @@ basic_v6_head()
 basic_v6_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	epair_one=$(vnet_mkepair)
@@ -265,6 +269,7 @@ vrrp_v6_head()
 vrrp_v6_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	j=carp_basic_v6
 
@@ -314,6 +319,7 @@ unicast_v6_head()
 unicast_v6_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	epair_one=$(vnet_mkepair)
@@ -375,6 +381,7 @@ unicast_ll_v6_head()
 unicast_ll_v6_body()
 {
 	carp_init
+	vnet_init_bridge
 
 	j=carp_uni_ll_v6
 
@@ -485,6 +492,7 @@ nd6_ns_source_mac_head()
 nd6_ns_source_mac_body()
 {
         carp_init
+        vnet_init_bridge
 
         bridge=$(vnet_mkbridge)
         epair_one=$(vnet_mkepair)

tests/sys/netpfil/common/rdr.sh

@@ -83,6 +83,7 @@ local_redirect_body()
 	firewall=$1
 	firewall_init $firewall
 	nat_init $firewall
+	vnet_init_bridge
 
 	bridge=$(vnet_mkbridge)
 	ifconfig ${bridge} 192.0.2.1/24 up

tests/sys/netpfil/pf/altq.sh

@@ -156,9 +156,7 @@ codel_bridge_body()
 {
 	altq_init
 	is_altq_supported codel
-	if ! kldstat -q -m if_bridge; then
-		atf_skip "This test requires if_bridge"
-	fi
+	vnet_init_bridge
 
 	epair=$(vnet_mkepair)
 	ifconfig ${epair}a 192.0.2.1/24 up

tests/sys/netpfil/pf/pfsync.sh

@@ -335,6 +335,7 @@ pbr_common_body()
 		atf_skip "This test requires carp"
 	fi
 	pfsynct_init
+	vnet_init_bridge
 
 	bridge0=$(vnet_mkbridge)
 	bridge1=$(vnet_mkbridge)

tests/sys/netpfil/pf/sctp.sh

@@ -504,6 +504,7 @@ pfsync_body()
 
 	sctp_init
 	pfsynct_init
+	vnet_init_bridge
 	if ! kldstat -q -m carp
 	then
 		atf_skip "This test requires carp"

tests/sys/netpfil/pf/tcp.sh

@@ -39,6 +39,7 @@ rst_head()
 rst_body()
 {
 	pft_init
+	vnet_init_bridge
 
 	epair_srv=$(vnet_mkepair)
 	epair_cl=$(vnet_mkepair)