[net-next,v4,4/5] bpf: Add SO_TXREHASH setsockopt

Commit Message

Akhmat Karakotov Jan. 28, 2022, 7:44 p.m. UTC

Add bpf socket option to override rehash behaviour from userspace or from bpf.

Signed-off-by: Akhmat Karakotov <[e-mail]>
Reviewed-by: Eric Dumazet <[e-mail]>
---
 net/core/filter.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

Patch

diff --git a/net/core/filter.c b/net/core/filter.c
index a06931c27eeb..9615ae1ab530 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5091,6 +5091,13 @@  static int _bpf_setsockopt(struct sock *sk, int level, int optname,
 		case SO_REUSEPORT:
 			sk->sk_reuseport = valbool;
 			break;
+		case SO_TXREHASH:
+			if (val < -1 || val > 1) {
+				ret = -EINVAL;
+				break;
+			}
+			sk->sk_txrehash = (u8)val;
+			break;
 		default:
 			ret = -EINVAL;
 		}
@@ -5269,6 +5276,9 @@  static int _bpf_getsockopt(struct sock *sk, int level, int optname,
 		case SO_REUSEPORT:
 			*((int *)optval) = sk->sk_reuseport;
 			break;
+		case SO_TXREHASH:
+			*((int *)optval) = sk->sk_txrehash;
+			break;
 		default:
 			goto err_clear;
 		}