netdev - [PATCH net-next 05/20] net: remove sk_route_forced

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Date:   Mon, 15 Nov 2021 11:02:34 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Arjun Roy <arjunroy@...gle.com>
Subject: [PATCH net-next 05/20] net: remove sk_route_forced_caps

From: Eric Dumazet <edumazet@...gle.com>

We were only using one bit, and we can replace it by sk_is_tcp()

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/sock.h | 3 ---
 net/core/sock.c    | 4 +++-
 net/ipv4/tcp.c     | 1 -
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 5bdeffdea5ecdb6069d13906bbf872d4479a1ce7..ebad629dd9eda4bcec6f621cf2d4f783f293b7b7 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -285,8 +285,6 @@ struct bpf_local_storage;
   *	@sk_no_check_rx: allow zero checksum in RX packets
   *	@sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
   *	@sk_route_nocaps: forbidden route capabilities (e.g NETIF_F_GSO_MASK)
-  *	@sk_route_forced_caps: static, forced route capabilities
-  *		(set in tcp_init_sock())
   *	@sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
   *	@sk_gso_max_size: Maximum GSO segment size to build
   *	@sk_gso_max_segs: Maximum number of GSO segments
@@ -461,7 +459,6 @@ struct sock {
 	struct page_frag	sk_frag;
 	netdev_features_t	sk_route_caps;
 	netdev_features_t	sk_route_nocaps;
-	netdev_features_t	sk_route_forced_caps;
 	int			sk_gso_type;
 	unsigned int		sk_gso_max_size;
 	gfp_t			sk_allocation;
diff --git a/net/core/sock.c b/net/core/sock.c
index 0be8e43f44b9e68678f4e20c3a86324ba1bfe03e..257b5fa604804ea671c0dbede4455ade8d65ede8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2244,7 +2244,9 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
 	u32 max_segs = 1;
 
 	sk_dst_set(sk, dst);
-	sk->sk_route_caps = dst->dev->features | sk->sk_route_forced_caps;
+	sk->sk_route_caps = dst->dev->features;
+	if (sk_is_tcp(sk))
+		sk->sk_route_caps |= NETIF_F_GSO;
 	if (sk->sk_route_caps & NETIF_F_GSO)
 		sk->sk_route_caps |= NETIF_F_GSO_SOFTWARE;
 	sk->sk_route_caps &= ~sk->sk_route_nocaps;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index b7796b4cf0a099e9f14b28e50cb07367021a7cbf..4fa4b29260bd4c08da70b3fb199e3459013114f3 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -456,7 +456,6 @@ void tcp_init_sock(struct sock *sk)
 	WRITE_ONCE(sk->sk_rcvbuf, sock_net(sk)->ipv4.sysctl_tcp_rmem[1]);
 
 	sk_sockets_allocated_inc(sk);
-	sk->sk_route_forced_caps = NETIF_F_GSO;
 }
 EXPORT_SYMBOL(tcp_init_sock);
 
-- 
2.34.0.rc1.387.gb447b232ab-goog