On Mon, Nov 17, 2025 at 06:00:29PM -0800, Bobby Eshleman wrote:
>From: Bobby Eshleman <bobbyeshleman@meta.com>
>
>Add functions for initializing namespaces with the different vsock NS
>modes. Callers can use add_namespaces() and del_namespaces() to create
>namespaces global0, global1, local0, and local1.
>
>The init_namespaces() function initializes global0, local0, etc... with
>their respective vsock NS mode. This function is separate so that tests
>that depend on this initialization can use it, while other tests that
>want to test the initialization interface itself can start with a clean
>slate by omitting this call.
>
>Remove namespaces upon exiting the program in cleanup(). This is
>unlikely to be needed for a healthy run, but it is useful for tests that
>are manually killed mid-test. In that case, this patch prevents the
>subsequent test run from finding stale namespaces with
>already-write-once-locked vsock ns modes.
>
>This patch is in preparation for later namespace tests.
>
>Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
>---
> tools/testing/selftests/vsock/vmtest.sh | 41 +++++++++++++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
>
>diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
>index c7b270dd77a9..f78cc574c274 100755
>--- a/tools/testing/selftests/vsock/vmtest.sh
>+++ b/tools/testing/selftests/vsock/vmtest.sh
>@@ -49,6 +49,7 @@ readonly TEST_DESCS=(
> )
>
> readonly USE_SHARED_VM=(vm_server_host_client vm_client_host_server vm_loopback)
>+readonly NS_MODES=("local" "global")
>
> VERBOSE=0
>
>@@ -103,6 +104,45 @@ check_result() {
> fi
> }
>
>+add_namespaces() {
>+ # add namespaces local0, local1, global0, and global1
>+ for mode in "${NS_MODES[@]}"; do
>+ ip netns add "${mode}0" 2>/dev/null
>+ ip netns add "${mode}1" 2>/dev/null
>+ done
>+}
>+
>+init_namespaces() {
>+ for mode in "${NS_MODES[@]}"; do
>+ ns_set_mode "${mode}0" "${mode}"
>+ ns_set_mode "${mode}1" "${mode}"
>+
>+ log_host "set ns ${mode}0 to mode ${mode}"
>+ log_host "set ns ${mode}1 to mode ${mode}"
>+
>+ # we need lo for qemu port forwarding
>+ ip netns exec "${mode}0" ip link set dev lo up
>+ ip netns exec "${mode}1" ip link set dev lo up
>+ done
>+}
>+
>+del_namespaces() {
>+ for mode in "${NS_MODES[@]}"; do
>+ ip netns del "${mode}0" &>/dev/null
>+ ip netns del "${mode}1" &>/dev/null
>+ log_host "removed ns ${mode}0"
>+ log_host "removed ns ${mode}1"
>+ done
>+}
>+
>+ns_set_mode() {
>+ local ns=$1
>+ local mode=$2
>+
>+ echo "${mode}" | ip netns exec "${ns}" \
>+ tee /proc/sys/net/vsock/ns_mode &>/dev/null
>+}
>+
> vm_ssh() {
> ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost "$@"
> return $?
>@@ -110,6 +150,7 @@ vm_ssh() {
>
> cleanup() {
> terminate_pidfiles "${!PIDFILES[@]}"
>+ del_namespaces
> }
>
> check_args() {
>
>--
>2.47.3
>