[PATCH net-next] selftests: net: Skip test if IPv6 is not configured

[Breno Leitao]

Extend the `check_for_dependencies()` function in `lib_netcons.sh` to check
whether IPv6 is enabled by verifying the existence of
`/proc/net/if_inet6`. Having IPv6 is a now a dependency of netconsole
tests. If the file does not exist, the script will skip the test with an
appropriate message suggesting to verify if `CONFIG_IPV6` is enabled.

This prevents the test to misbehave if IPv6 is not configured.

Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
---
 tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh b/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh
index 258af805497b4..b6071e80ebbb6 100644
--- a/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh
+++ b/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh
@@ -281,6 +281,11 @@ function check_for_dependencies() {
 		exit "${ksft_skip}"
 	fi
 
+	if [ ! -f /proc/net/if_inet6 ]; then
+		echo "SKIP: IPv6 not configured. Check if CONFIG_IPV6 is enabled" >&2
+		exit "${ksft_skip}"
+	fi
+
 	if [ ! -f "${NSIM_DEV_SYS_NEW}" ]; then
 		echo "SKIP: file ${NSIM_DEV_SYS_NEW} does not exist. Check if CONFIG_NETDEVSIM is enabled" >&2
 		exit "${ksft_skip}"

---
base-commit: dd500e4aecf25e48e874ca7628697969df679493
change-id: 20250723-netcons_test_ipv6-15b1b76bb231

Best regards,
--  
Breno Leitao <leitao@xxxxxxxxxx>