From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pablo Neira Ayuso Subject: [PATCH 06/51] ipvs: do not use skb_share_check Date: Sat, 6 Apr 2013 14:17:05 +0200 Message-ID: <1365250670-14993-7-git-send-email-pablo@netfilter.org> References: <1365250670-14993-1-git-send-email-pablo@netfilter.org> Cc: davem@davemloft.net, netdev@vger.kernel.org To: netfilter-devel@vger.kernel.org Return-path: Received: from mail.us.es ([193.147.175.20]:38881 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1163358Ab3DFMSM (ORCPT ); Sat, 6 Apr 2013 08:18:12 -0400 In-Reply-To: <1365250670-14993-1-git-send-email-pablo@netfilter.org> Sender: netfilter-devel-owner@vger.kernel.org List-ID: From: Julian Anastasov We run in contexts like ip_rcv, ipv6_rcv, br_handle_frame, do not expect shared skbs. Signed-off-by: Julian Anastasov Signed-off by: Hans Schillstrom Signed-off-by: Simon Horman --- net/netfilter/ipvs/ip_vs_xmit.c | 45 ++------------------------------------- 1 file changed, 2 insertions(+), 43 deletions(-) diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c index c942d36..e6e2d3f 100644 --- a/net/netfilter/ipvs/ip_vs_xmit.c +++ b/net/netfilter/ipvs/ip_vs_xmit.c @@ -421,14 +421,6 @@ ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, goto tx_error; } - /* - * Call ip_send_check because we are not sure it is called - * after ip_defrag. Is copy-on-write needed? - */ - if (unlikely((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)) { - ip_rt_put(rt); - return NF_STOLEN; - } ip_send_check(ip_hdr(skb)); /* drop old route */ @@ -482,16 +474,6 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, goto tx_error; } - /* - * Call ip_send_check because we are not sure it is called - * after ip_defrag. Is copy-on-write needed? - */ - skb = skb_share_check(skb, GFP_ATOMIC); - if (unlikely(skb == NULL)) { - dst_release(&rt->dst); - return NF_STOLEN; - } - /* drop old route */ skb_dst_drop(skb); skb_dst_set(skb, &rt->dst); @@ -708,7 +690,6 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, ipv6_hdr(skb)->daddr = cp->daddr.in6; if (!local || !skb->dev) { - /* drop the old route when skb is not shared */ skb_dst_drop(skb); skb_dst_set(skb, &rt->dst); } else { @@ -814,8 +795,7 @@ ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, */ max_headroom = LL_RESERVED_SPACE(tdev) + sizeof(struct iphdr); - if (skb_headroom(skb) < max_headroom - || skb_cloned(skb) || skb_shared(skb)) { + if (skb_headroom(skb) < max_headroom || skb_cloned(skb)) { struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); if (!new_skb) { @@ -935,8 +915,7 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, */ max_headroom = LL_RESERVED_SPACE(tdev) + sizeof(struct ipv6hdr); - if (skb_headroom(skb) < max_headroom - || skb_cloned(skb) || skb_shared(skb)) { + if (skb_headroom(skb) < max_headroom || skb_cloned(skb)) { struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); if (!new_skb) { @@ -1034,14 +1013,6 @@ ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, goto tx_error; } - /* - * Call ip_send_check because we are not sure it is called - * after ip_defrag. Is copy-on-write needed? - */ - if (unlikely((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)) { - ip_rt_put(rt); - return NF_STOLEN; - } ip_send_check(ip_hdr(skb)); /* drop old route */ @@ -1099,16 +1070,6 @@ ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, goto tx_error; } - /* - * Call ip_send_check because we are not sure it is called - * after ip_defrag. Is copy-on-write needed? - */ - skb = skb_share_check(skb, GFP_ATOMIC); - if (unlikely(skb == NULL)) { - dst_release(&rt->dst); - return NF_STOLEN; - } - /* drop old route */ skb_dst_drop(skb); skb_dst_set(skb, &rt->dst); @@ -1220,7 +1181,6 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, ip_vs_nat_icmp(skb, pp, cp, 0); if (!local) { - /* drop the old route when skb is not shared */ skb_dst_drop(skb); skb_dst_set(skb, &rt->dst); } else @@ -1337,7 +1297,6 @@ ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, ip_vs_nat_icmp_v6(skb, pp, cp, 0); if (!local || !skb->dev) { - /* drop the old route when skb is not shared */ skb_dst_drop(skb); skb_dst_set(skb, &rt->dst); } else { -- 1.7.10.4