From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brice Goglin Subject: [PATCH][LRO] Fix lro_mgr->features checks Date: Mon, 07 Jan 2008 14:33:32 +0100 Message-ID: <47822A2C.4020303@inria.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "Andrew J. Gallatin" , Jan-Bernd Themann , Linus Torvalds , LKML , netdev@vger.kernel.org To: "David S. Miller" Return-path: Received: from iona.labri.fr ([147.210.8.143]:50087 "EHLO iona.labri.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751184AbYAGOAO (ORCPT ); Mon, 7 Jan 2008 09:00:14 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Hi Dave, The LRO_F_* checks in inet_lro.c are buggy, the following patch is needed to check lro_mgr->features correctly. I decided to follow the NETIF_F_* convention and thus removed test_bit. Some people might like it better if we keep using test_bit and just set lro_mgr->features to 1<features containing LRO_F_EXTRACT_VLAN_ID. Please apply for 2.6.24. Brice [PATCH][LRO] Fix lro_mgr->features checks lro_mgr->features contains a bitmask of LRO_F_* values which are defined as power of two, not as bit indexes. They must be checked with x&LRO_F_FOO, not with test_bit(LRO_F_FOO,&x). Signed-off-by: Brice Goglin Acked-by: Andrew Gallatin --- diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c index 9a96c27..4a4d49f 100644 --- a/net/ipv4/inet_lro.c +++ b/net/ipv4/inet_lro.c @@ -310,7 +310,7 @@ static void lro_flush(struct net_lro_mgr *lro_mgr, skb_shinfo(lro_desc->parent)->gso_size = lro_desc->mss; if (lro_desc->vgrp) { - if (test_bit(LRO_F_NAPI, &lro_mgr->features)) + if (lro_mgr->features & LRO_F_NAPI) vlan_hwaccel_receive_skb(lro_desc->parent, lro_desc->vgrp, lro_desc->vlan_tag); @@ -320,7 +320,7 @@ static void lro_flush(struct net_lro_mgr *lro_mgr, lro_desc->vlan_tag); } else { - if (test_bit(LRO_F_NAPI, &lro_mgr->features)) + if (lro_mgr->features & LRO_F_NAPI) netif_receive_skb(lro_desc->parent); else netif_rx(lro_desc->parent); @@ -352,7 +352,7 @@ static int __lro_proc_skb(struct net_lro_mgr *lro_mgr, struct sk_buff *skb, goto out; if ((skb->protocol == htons(ETH_P_8021Q)) - && !test_bit(LRO_F_EXTRACT_VLAN_ID, &lro_mgr->features)) + && !(lro_mgr->features & LRO_F_EXTRACT_VLAN_ID)) vlan_hdr_len = VLAN_HLEN; if (!lro_desc->active) { /* start new lro session */ @@ -474,7 +474,7 @@ static struct sk_buff *__lro_proc_segment(struct net_lro_mgr *lro_mgr, goto out; if ((skb->protocol == htons(ETH_P_8021Q)) - && !test_bit(LRO_F_EXTRACT_VLAN_ID, &lro_mgr->features)) + && !(lro_mgr->features & LRO_F_EXTRACT_VLAN_ID)) vlan_hdr_len = VLAN_HLEN; iph = (void *)(skb->data + vlan_hdr_len); @@ -516,7 +516,7 @@ void lro_receive_skb(struct net_lro_mgr *lro_mgr, void *priv) { if (__lro_proc_skb(lro_mgr, skb, NULL, 0, priv)) { - if (test_bit(LRO_F_NAPI, &lro_mgr->features)) + if (lro_mgr->features & LRO_F_NAPI) netif_receive_skb(skb); else netif_rx(skb); @@ -531,7 +531,7 @@ void lro_vlan_hwaccel_receive_skb(struct net_lro_mgr *lro_mgr, void *priv) { if (__lro_proc_skb(lro_mgr, skb, vgrp, vlan_tag, priv)) { - if (test_bit(LRO_F_NAPI, &lro_mgr->features)) + if (lro_mgr->features & LRO_F_NAPI) vlan_hwaccel_receive_skb(skb, vgrp, vlan_tag); else vlan_hwaccel_rx(skb, vgrp, vlan_tag); @@ -550,7 +550,7 @@ void lro_receive_frags(struct net_lro_mgr *lro_mgr, if (!skb) return; - if (test_bit(LRO_F_NAPI, &lro_mgr->features)) + if (lro_mgr->features & LRO_F_NAPI) netif_receive_skb(skb); else netif_rx(skb); @@ -570,7 +570,7 @@ void lro_vlan_hwaccel_receive_frags(struct net_lro_mgr *lro_mgr, if (!skb) return; - if (test_bit(LRO_F_NAPI, &lro_mgr->features)) + if (lro_mgr->features & LRO_F_NAPI) vlan_hwaccel_receive_skb(skb, vgrp, vlan_tag); else vlan_hwaccel_rx(skb, vgrp, vlan_tag);