From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Herbert Subject: [PATCH v3 net-next 01/11] gso: Remove arbitrary checks for unsupported GSO Date: Fri, 6 May 2016 15:11:56 -0700 Message-ID: <1462572726-566137-2-git-send-email-tom@herbertland.com> References: <1462572726-566137-1-git-send-email-tom@herbertland.com> Mime-Version: 1.0 Content-Type: text/plain Cc: To: , Return-path: Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:22771 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758589AbcEFWMO (ORCPT ); Fri, 6 May 2016 18:12:14 -0400 Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.16.0.11/8.16.0.11) with SMTP id u46M8TN6023374 for ; Fri, 6 May 2016 15:12:13 -0700 Received: from mail.thefacebook.com ([199.201.64.23]) by m0001303.ppops.net with ESMTP id 22ruk83fc8-6 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Fri, 06 May 2016 15:12:13 -0700 Received: from devbig284.prn2.facebook.com (10.35.15.32) by mx-out.facebook.com (10.212.236.87) with ESMTP id 949d62de13d711e6ae7d0002c9521c9e-807fcc50 for ; Fri, 06 May 2016 15:12:11 -0700 In-Reply-To: <1462572726-566137-1-git-send-email-tom@herbertland.com> Sender: netdev-owner@vger.kernel.org List-ID: In several gso_segment functions there are checks of gso_type against a seemingly arbitrary list of SKB_GSO_* flags. This seems like an attempt to identify unsupported GSO types, but since the stack is the one that set these GSO types in the first place this seems unnecessary to do. If a combination isn't valid in the first place that stack should not allow setting it. This is a code simplication especially for add new GSO types. Signed-off-by: Tom Herbert --- net/ipv4/af_inet.c | 18 ------------------ net/ipv4/gre_offload.c | 14 -------------- net/ipv4/tcp_offload.c | 19 ------------------- net/ipv4/udp_offload.c | 10 ---------- net/ipv6/ip6_offload.c | 18 ------------------ net/ipv6/udp_offload.c | 13 ------------- net/mpls/mpls_gso.c | 9 --------- 7 files changed, 101 deletions(-) diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 2e6e65f..7f08d45 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1205,24 +1205,6 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int ihl; int id; - if (unlikely(skb_shinfo(skb)->gso_type & - ~(SKB_GSO_TCPV4 | - SKB_GSO_UDP | - SKB_GSO_DODGY | - SKB_GSO_TCP_ECN | - SKB_GSO_GRE | - SKB_GSO_GRE_CSUM | - SKB_GSO_IPIP | - SKB_GSO_SIT | - SKB_GSO_TCPV6 | - SKB_GSO_UDP_TUNNEL | - SKB_GSO_UDP_TUNNEL_CSUM | - SKB_GSO_TCP_FIXEDID | - SKB_GSO_TUNNEL_REMCSUM | - SKB_GSO_PARTIAL | - 0))) - goto out; - skb_reset_network_header(skb); nhoff = skb_network_header(skb) - skb_mac_header(skb); if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index e88190a..ecd1e09 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -26,20 +26,6 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb, int gre_offset, outer_hlen; bool need_csum, ufo; - if (unlikely(skb_shinfo(skb)->gso_type & - ~(SKB_GSO_TCPV4 | - SKB_GSO_TCPV6 | - SKB_GSO_UDP | - SKB_GSO_DODGY | - SKB_GSO_TCP_ECN | - SKB_GSO_TCP_FIXEDID | - SKB_GSO_GRE | - SKB_GSO_GRE_CSUM | - SKB_GSO_IPIP | - SKB_GSO_SIT | - SKB_GSO_PARTIAL))) - goto out; - if (!skb->encapsulation) goto out; diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c index 02737b6..5c59649 100644 --- a/net/ipv4/tcp_offload.c +++ b/net/ipv4/tcp_offload.c @@ -83,25 +83,6 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb, if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { /* Packet is from an untrusted source, reset gso_segs. */ - int type = skb_shinfo(skb)->gso_type; - - if (unlikely(type & - ~(SKB_GSO_TCPV4 | - SKB_GSO_DODGY | - SKB_GSO_TCP_ECN | - SKB_GSO_TCP_FIXEDID | - SKB_GSO_TCPV6 | - SKB_GSO_GRE | - SKB_GSO_GRE_CSUM | - SKB_GSO_IPIP | - SKB_GSO_SIT | - SKB_GSO_UDP_TUNNEL | - SKB_GSO_UDP_TUNNEL_CSUM | - SKB_GSO_TUNNEL_REMCSUM | - 0) || - !(type & (SKB_GSO_TCPV4 | - SKB_GSO_TCPV6)))) - goto out; skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 097060de..b556ef6 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -209,16 +209,6 @@ static struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb, if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { /* Packet is from an untrusted source, reset gso_segs. */ - int type = skb_shinfo(skb)->gso_type; - - if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY | - SKB_GSO_UDP_TUNNEL | - SKB_GSO_UDP_TUNNEL_CSUM | - SKB_GSO_TUNNEL_REMCSUM | - SKB_GSO_IPIP | - SKB_GSO_GRE | SKB_GSO_GRE_CSUM) || - !(type & (SKB_GSO_UDP)))) - goto out; skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c index f5eb184..9ad743b 100644 --- a/net/ipv6/ip6_offload.c +++ b/net/ipv6/ip6_offload.c @@ -69,24 +69,6 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, bool encap, udpfrag; int nhoff; - if (unlikely(skb_shinfo(skb)->gso_type & - ~(SKB_GSO_TCPV4 | - SKB_GSO_UDP | - SKB_GSO_DODGY | - SKB_GSO_TCP_ECN | - SKB_GSO_TCP_FIXEDID | - SKB_GSO_TCPV6 | - SKB_GSO_GRE | - SKB_GSO_GRE_CSUM | - SKB_GSO_IPIP | - SKB_GSO_SIT | - SKB_GSO_UDP_TUNNEL | - SKB_GSO_UDP_TUNNEL_CSUM | - SKB_GSO_TUNNEL_REMCSUM | - SKB_GSO_PARTIAL | - 0))) - goto out; - skb_reset_network_header(skb); nhoff = skb_network_header(skb) - skb_mac_header(skb); if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c index 5429f6b..ac858c4 100644 --- a/net/ipv6/udp_offload.c +++ b/net/ipv6/udp_offload.c @@ -36,19 +36,6 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { /* Packet is from an untrusted source, reset gso_segs. */ - int type = skb_shinfo(skb)->gso_type; - - if (unlikely(type & ~(SKB_GSO_UDP | - SKB_GSO_DODGY | - SKB_GSO_UDP_TUNNEL | - SKB_GSO_UDP_TUNNEL_CSUM | - SKB_GSO_TUNNEL_REMCSUM | - SKB_GSO_GRE | - SKB_GSO_GRE_CSUM | - SKB_GSO_IPIP | - SKB_GSO_SIT) || - !(type & (SKB_GSO_UDP)))) - goto out; skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); diff --git a/net/mpls/mpls_gso.c b/net/mpls/mpls_gso.c index bbcf604..6de1e13 100644 --- a/net/mpls/mpls_gso.c +++ b/net/mpls/mpls_gso.c @@ -26,15 +26,6 @@ static struct sk_buff *mpls_gso_segment(struct sk_buff *skb, netdev_features_t mpls_features; __be16 mpls_protocol; - if (unlikely(skb_shinfo(skb)->gso_type & - ~(SKB_GSO_TCPV4 | - SKB_GSO_TCPV6 | - SKB_GSO_UDP | - SKB_GSO_DODGY | - SKB_GSO_TCP_FIXEDID | - SKB_GSO_TCP_ECN))) - goto out; - /* Setup inner SKB. */ mpls_protocol = skb->protocol; skb->protocol = skb->inner_protocol; -- 2.8.0.rc2