git: 1e824ee84f46 - main - if_bridge tests: test adding interfaces with different MTU

The branch main has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=1e824ee84f46b4a086bc3c7c528c0762e388bc66

commit 1e824ee84f46b4a086bc3c7c528c0762e388bc66
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2022-06-25 11:47:31 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2022-06-27 06:27:28 +0000

    if_bridge tests: test adding interfaces with different MTU
    
    We now allow new bridge members to be added with a different MTU from
    the bridge. We change the interface MTU to match the bridge.
    Test this.
    
    PR:     264883
---
 tests/sys/net/if_bridge_test.sh | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/tests/sys/net/if_bridge_test.sh b/tests/sys/net/if_bridge_test.sh
index 4cc935ceefa8..275a3bae5841 100755
--- a/tests/sys/net/if_bridge_test.sh
+++ b/tests/sys/net/if_bridge_test.sh
@@ -558,9 +558,6 @@ mtu_body()
 
 	atf_check -s exit:0 \
 		ifconfig ${bridge} addm ${epair}a
-	# Can't add an interface with an MTU mismatch
-	atf_check -s exit:1 -e ignore \
-		ifconfig ${bridge} addm ${gif}
 
 	ifconfig ${gif} mtu 1500
 	atf_check -s exit:0 \
@@ -586,6 +583,17 @@ mtu_body()
 	atf_check -s exit:1 -e ignore \
 		ifconfig ${epair}a mtu 1900
 	check_mtu ${epair}a 2000
+
+	# Test adding an interface with a different MTU
+	new_epair=$(vnet_mkepair)
+	check_mtu ${new_epair}a 1500
+	atf_check -s exit:0 -e ignore \
+		ifconfig ${bridge} addm ${new_epair}a
+
+	check_mtu ${bridge} 2000
+	check_mtu ${gif} 2000
+	check_mtu ${epair}a 2000
+	check_mtu ${new_epair}a 2000
 }
 
 mtu_cleanup()