Add NETLINK_KOBJECT_UEVENT socket support

NETLINK_KOBJECT_UEVENT sockets send udev-style messages for device events.
gVisor doesn't have any device events, so our sockets don't need to do anything
once created.

systemd's device manager needs to be able to create one of these sockets. It
also wants to install a BPF filter on the socket. Since we'll never send any
messages, the filter would never be invoked, thus we just fake it out.

Fixes #1117
Updates #1119

PiperOrigin-RevId: 278405893

1 files changed, 29 insertions, 0 deletions

diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD
index 833fbaa09..93bff8299 100644
--- a/test/syscalls/linux/BUILD
+++ b/test/syscalls/linux/BUILD
@@ -2676,6 +2676,20 @@ cc_binary(
 )
 
 cc_binary(
+    name = "socket_netlink_test",
+    testonly = 1,
+    srcs = ["socket_netlink.cc"],
+    linkstatic = 1,
+    deps = [
+        ":socket_test_util",
+        "//test/util:file_descriptor",
+        "//test/util:test_main",
+        "//test/util:test_util",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
+cc_binary(
     name = "socket_netlink_route_test",
     testonly = 1,
     srcs = ["socket_netlink_route.cc"],
@@ -2692,6 +2706,21 @@ cc_binary(
     ],
 )
 
+cc_binary(
+    name = "socket_netlink_uevent_test",
+    testonly = 1,
+    srcs = ["socket_netlink_uevent.cc"],
+    linkstatic = 1,
+    deps = [
+        ":socket_netlink_util",
+        ":socket_test_util",
+        "//test/util:file_descriptor",
+        "//test/util:test_main",
+        "//test/util:test_util",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
 # These socket tests are in a library because the test cases are shared
 # across several test build targets.
 cc_library(