Support bpf_getsockopt if application tries to know what the delayed ack
max time is.
Signed-off-by: Jason Xing <kerneljasonxing@xxxxxxxxx>
---
net/core/filter.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/net/core/filter.c b/net/core/filter.c
index 31aef259e104..5564917e0c6d 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5415,6 +5415,17 @@ static int sol_tcp_sockopt(struct sock *sk, int optname,
if (*optlen < 1)
return -EINVAL;
break;
+ case TCP_BPF_DELACK_MAX:
+ if (*optlen != sizeof(int))
+ return -EINVAL;
+ if (getopt) {
+ int delack_max = inet_csk(sk)->icsk_delack_max;
+ int delack_max_us = jiffies_to_usecs(delack_max);
+
+ memcpy(optval, &delack_max_us, *optlen);
+ return 0;
+ }
+ return bpf_sol_tcp_setsockopt(sk, optname, optval, *optlen);
case TCP_BPF_RTO_MIN:
if (*optlen != sizeof(int))
return -EINVAL;
--
2.43.5
