bpf: Add support for forced LINK_DETACH command

[linux-2.6-microblaze.git] / kernel / bpf / net_namespace.c

diff --git a/kernel/bpf/net_namespace.c b/kernel/bpf/net_namespace.c
index 71405ed..542f275 100644 (file)
--- a/kernel/bpf/net_namespace.c
+++ b/kernel/bpf/net_namespace.c
@@ -142,9 +142,16 @@ static void bpf_netns_link_release(struct bpf_link *link)
        bpf_prog_array_free(old_array);
 
 out_unlock:
+       net_link->net = NULL;
        mutex_unlock(&netns_bpf_mutex);
 }
 
+static int bpf_netns_link_detach(struct bpf_link *link)
+{
+       bpf_netns_link_release(link);
+       return 0;
+}
+
 static void bpf_netns_link_dealloc(struct bpf_link *link)
 {
        struct bpf_netns_link *net_link =
@@ -228,6 +235,7 @@ static void bpf_netns_link_show_fdinfo(const struct bpf_link *link,
 static const struct bpf_link_ops bpf_netns_link_ops = {
        .release = bpf_netns_link_release,
        .dealloc = bpf_netns_link_dealloc,
+       .detach = bpf_netns_link_detach,
        .update_prog = bpf_netns_link_update_prog,
        .fill_link_info = bpf_netns_link_fill_info,
        .show_fdinfo = bpf_netns_link_show_fdinfo,