net-timestamp: introduce cgroup lock to avoid affecting non-bpf cases

Introducing the lock to avoid affecting the applications which are not using timestamping bpf feature. Signed-off-by: Jason Xing <[email protected]>
kernel-patches · Feb 1, 2025 · 070fc02 · 070fc02
1 parent da6ea0f
commit 070fc02
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
@@ -493,7 +493,8 @@ static void tcp_tx_timestamp(struct sock *sk, struct sockcm_cookie *sockc)
 			shinfo->tskey = TCP_SKB_CB(skb)->seq + skb->len - 1;
 	}
 
-	if (SK_BPF_CB_FLAG_TEST(sk, SK_BPF_CB_TX_TIMESTAMPING) && skb) {
+	if (cgroup_bpf_enabled(CGROUP_SOCK_OPS) &&
+	    SK_BPF_CB_FLAG_TEST(sk, SK_BPF_CB_TX_TIMESTAMPING) && skb) {
 		struct skb_shared_info *shinfo = skb_shinfo(skb);
 		struct tcp_skb_cb *tcb = TCP_SKB_CB(skb);