On Wed, Jun 18, 2025 at 07:40:25PM +0900, Yuyang Huang wrote:
This commit adds a new kernel selftest to verify RTNLGRP_IPV6_ACADDR notifications. The test works by adding/removing a dummy interface, enabling packet forwarding, and then confirming that user space can correctly receive anycast notifications.
The test relies on the iproute2 version to be 6.13+.
Tested by the following command: $ vng -v --user root --cpus 16 -- \ make -C tools/testing/selftests TARGETS=net TEST_PROGS=rtnetlink_notification.sh \ TEST_GEN_PROGS="" run_tests
Signed-off-by: Yuyang Huang yuyanghuang@google.com
.../selftests/net/rtnetlink_notification.sh | 52 +++++++++++++++++-- 1 file changed, 47 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/net/rtnetlink_notification.sh b/tools/testing/selftests/net/rtnetlink_notification.sh
...
@@ -18,12 +20,11 @@ kci_test_mcast_addr_notification() local tmpfile local monitor_pid local match_result
- local test_dev="test-dummy1"
tmpfile=$(mktemp) defer rm "$tmpfile"
- ip monitor maddr > $tmpfile &
- ip monitor maddr > "$tmpfile" & monitor_pid=$! defer kill_process "$monitor_pid"
@@ -32,7 +33,7 @@ kci_test_mcast_addr_notification() if [ ! -e "/proc/$monitor_pid" ]; then RET=$ksft_skip log_test "mcast addr notification: iproute2 too old"
return $RET
return "$RET"ip link add name "$test_dev" type dummy
@@ -53,7 +54,48 @@ kci_test_mcast_addr_notification() RET=$ksft_fail fi log_test "mcast addr notification: Expected 4 matches, got $match_result"
- return $RET
- return "$RET"
+}
...
@@ -67,4 +109,4 @@ require_command ip tests_run -exit $EXIT_STATUS +exit "$EXIT_STATUS"
Hi,
While I like the changes above (that I haven't trimmed-out) these seem to be clean-ups that aren't strictly related to the subject of this patch. IOW, they don't belong in this patch (but could be a separate patch).