From patchwork Fri Apr 26 06:51:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 13644159 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 8AAAA13AA3E; Fri, 26 Apr 2024 06:51:54 +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=1714114316; cv=none; b=pBRKh+V7PD6L5Asi0Jo3UZIVfxjJucCKXsgjpm8G6s0qu+zcqdoRSeYiNthfbKBKBCMNF7mI7z5YyjYs6Ufx3JeoXqCqhirLH81pRo7wD/fMQmF5rDNHh9YEjvf5Ztq5SSn4ZYVaS0akU5iG6Z5aIiFcSzOEDy9fgmLCTge6VL4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714114316; c=relaxed/simple; bh=VuEbKNV4XwlPXs+jXQPrrZF3c45OJOnoayT18xqgRjw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MhcvpEVI0WGWc78RWNvJ25he/E3DLH6Ml17dv20YZczNJZ1O/s0OqjZdx32zlRfYAsVdTFV7woT+NN28Jp78LeWfFCGIPvp0Ipy6h74hxPqulquFxk6zBtzsAwZPj7/u9WPRz5ZLFqAsd/gMVMlAQyKtPSfVKrxW7P8Q2tGrLS0= 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=JSGPig9Z; 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="JSGPig9Z" 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=kuFarNp67I2ntE4ihdHxeLO9vh/dXbyzjFjq3+OVjSY=; b=JSGPig9Za8M2F+Ki534JH/2Xjb qywuUMMyy3vPK6r1pEKJglddhqWa638b13fJ3F3Y7ToMYaaCieGAu3Qhmsr1cgXDTvvGKGIu0kzgC m7RHPW+AmE1rwikCEOTFIrAAzjsR6xhW/OPZY2ml0C9GSOOCo4TEAI9GCsG9XRwQuZTI=; 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 1s0FQx-007ltt-24; Fri, 26 Apr 2024 08:51:47 +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 v3 net-next v3 4/6] net: create tcp_gro_lookup helper function Date: Fri, 26 Apr 2024 08:51:38 +0200 Message-ID: <20240426065143.4667-5-nbd@nbd.name> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240426065143.4667-1-nbd@nbd.name> References: <20240426065143.4667-1-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. Signed-off-by: Felix Fietkau Reviewed-by: Eric Dumazet --- 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 ffc9371fe9de..a3f09aa44487 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -2198,6 +2198,7 @@ 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 ffd6b7a4163a..3ee5a1b21976 100644 --- a/net/ipv4/tcp_offload.c +++ b/net/ipv4/tcp_offload.c @@ -243,6 +243,27 @@ 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; @@ -280,24 +301,12 @@ 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)) &