git: 9d48283d6028 - main - carp tests: test manually switch between backup and master

The branch main has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=9d48283d60284eb62fd32d2d8113cbf0beca28b3

commit 9d48283d60284eb62fd32d2d8113cbf0beca28b3
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2023-03-16 10:16:24 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2023-03-20 09:52:53 +0000

    carp tests: test manually switch between backup and master
    
    There's been at least one issue where we failed to correctly enter
    NET_EPOCH that was triggered in this scenario.
    Add a test case for it to make it easier to detect issues like this in
    the future.
    
    Reviewed by:    zlei
    Sponsored by:   Rubicon Communications, LLC ("Netgate")
    Differential Revision:  https://reviews.freebsd.org/D39115
---
 tests/sys/netinet/carp.sh | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/tests/sys/netinet/carp.sh b/tests/sys/netinet/carp.sh
index d31a17ed6beb..9afe9d2ea8c1 100755
--- a/tests/sys/netinet/carp.sh
+++ b/tests/sys/netinet/carp.sh
@@ -263,10 +263,35 @@ nd6_ns_source_mac_cleanup()
 }
 
 
+atf_test_case "switch" "cleanup"
+switch_head()
+{
+	atf_set descr 'Switch between master and backup'
+	atf_set require.user root
+}
+
+switch_body()
+{
+	carp_init
+
+	epair=$(vnet_mkepair)
+
+	ifconfig ${epair}a up
+	ifconfig ${epair}a vhid 1 advskew 100 192.0.2.1/24
+	ifconfig ${epair}a vhid 1 state backup
+	ifconfig ${epair}a vhid 1 state master
+}
+
+switch_cleanup()
+{
+	vnet_cleanup
+}
+
 atf_init_test_cases()
 {
 	atf_add_test_case "basic_v4"
 	atf_add_test_case "basic_v6"
 	atf_add_test_case "negative_demotion"
 	atf_add_test_case "nd6_ns_source_mac"
+	atf_add_test_case "switch"
 }