From patchwork Sat Apr 27 18:23:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 13645721 X-Patchwork-Delegate: kuba@kernel.org Received: from nbd.name (nbd.name [46.4.11.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9724213C83D; Sat, 27 Apr 2024 18:23:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.4.11.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714242197; cv=none; b=bH0VHRys/odjiK/dp0T/mlvKeg0WFOW73wfWdjYSFGtSae82KPxhX4I0jmg7uaYRYW1KWJprQBPT4I0LIuXEFrd/NbdWupBjyY9c17ZOwmbSgBjSrm16JgRP/7bDTwz/JwlzkNLRtebLJhlNfxZbtlYrZEZv8PX4+E7a2ZigTOs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714242197; c=relaxed/simple; bh=ox9NAfeFhrqPjBwzkXsYvR/UGk8/bElDUx9v+3/w7Vw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NTDb7KB2ofgEsPSIDCmuHP8N8GjqPrXlvkR5MF3vkxLNzWBFV6GNyl0BxVUbEzT0i6Pbk4BqVT+3n8lYww/AWH2BFl4PTpbBknjFvyEX/pEQK11atpBzavx59ewsjGSnuuSIM5xwsyup4NL46lmP1sh2lWXm+ZhZXjSEB9aBMz8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nbd.name; spf=none smtp.mailfrom=nbd.name; dkim=pass (1024-bit key) header.d=nbd.name header.i=@nbd.name header.b=OIV25w+t; arc=none smtp.client-ip=46.4.11.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nbd.name Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=nbd.name Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=nbd.name header.i=@nbd.name header.b="OIV25w+t" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=BSttFQg1nonWcp0gKuSSH24BV2EZe3joxZU+Ft51YOw=; b=OIV25w+tBz7y+OrOsQVxMO0krw Kfw0sViqFFwW/Nikt6kW7CKijfuHF7RDen1rCGZixtgsQoay80bNH6tUp7lJUcqE8BU4+B1oDY2NJ kB9QSi6wzqpLfDTDQwoT2sB3JypUMwSCpyYtRXs16m5qNhuvnvUhGlX0r5/aIIXqbyxg=; Received: from p54ae9c93.dip0.t-ipconnect.de ([84.174.156.147] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (Exim 4.96) (envelope-from ) id 1s0mhZ-008hH3-1B; Sat, 27 Apr 2024 20:23:09 +0200 From: Felix Fietkau To: netdev@vger.kernel.org, Eric Dumazet , "David S. Miller" , Jakub Kicinski , Paolo Abeni , David Ahern Cc: willemdebruijn.kernel@gmail.com, linux-kernel@vger.kernel.org Subject: [PATCH v4 net-next v4 4/6] net: create tcp_gro_lookup helper function Date: Sat, 27 Apr 2024 20:23:00 +0200 Message-ID: <20240427182305.24461-5-nbd@nbd.name> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240427182305.24461-1-nbd@nbd.name> References: <20240427182305.24461-1-nbd@nbd.name> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org This pulls the flow port matching out of tcp_gro_receive, so that it can be reused for the next change, which adds the TCP fraglist GRO heuristic. Reviewed-by: Eric Dumazet Signed-off-by: Felix Fietkau --- include/net/tcp.h | 1 + net/ipv4/tcp_offload.c | 41 +++++++++++++++++++++++++---------------- 2 files changed, 26 insertions(+), 16 deletions(-) diff --git a/include/net/tcp.h b/include/net/tcp.h index a9eb21251195..9f08ecab26e0 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -2199,6 +2199,7 @@ void tcp_v4_destroy_sock(struct sock *sk); struct sk_buff *tcp_gso_segment(struct sk_buff *skb, netdev_features_t features); +struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th); struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb); INDIRECT_CALLABLE_DECLARE(int tcp4_gro_complete(struct sk_buff *skb, int thoff)); INDIRECT_CALLABLE_DECLARE(struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb)); diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c index aa7508676315..4a194a9d36cd 100644 --- a/net/ipv4/tcp_offload.c +++ b/net/ipv4/tcp_offload.c @@ -245,6 +245,27 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb, return segs; } +struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th) +{ + struct tcphdr *th2; + struct sk_buff *p; + + list_for_each_entry(p, head, list) { + if (!NAPI_GRO_CB(p)->same_flow) + continue; + + th2 = tcp_hdr(p); + if (*(u32 *)&th->source ^ *(u32 *)&th2->source) { + NAPI_GRO_CB(p)->same_flow = 0; + continue; + } + + return p; + } + + return NULL; +} + struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb) { struct sk_buff *pp = NULL; @@ -282,24 +303,12 @@ struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb) len = skb_gro_len(skb); flags = tcp_flag_word(th); - list_for_each_entry(p, head, list) { - if (!NAPI_GRO_CB(p)->same_flow) - continue; - - th2 = tcp_hdr(p); - - if (*(u32 *)&th->source ^ *(u32 *)&th2->source) { - NAPI_GRO_CB(p)->same_flow = 0; - continue; - } - - goto found; - } - p = NULL; - goto out_check_final; + p = tcp_gro_lookup(head, th); + if (!p) + goto out_check_final; -found: /* Include the IP ID check below from the inner most IP hdr */ + th2 = tcp_hdr(p); flush = NAPI_GRO_CB(p)->flush; flush |= (__force int)(flags & TCP_FLAG_CWR); flush |= (__force int)((flags ^ tcp_flag_word(th2)) &