From owner-svn-src-all@freebsd.org Thu Jun 18 10:17:37 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1709C34AF48; Thu, 18 Jun 2020 10:17:37 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49ndD06ngjz4RrW; Thu, 18 Jun 2020 10:17:36 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id CB2902FE1E; Thu, 18 Jun 2020 10:17:36 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 05IAHaQ2063275; Thu, 18 Jun 2020 10:17:36 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 05IAHadO063274; Thu, 18 Jun 2020 10:17:36 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <202006181017.05IAHadO063274@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Thu, 18 Jun 2020 10:17:36 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r362307 - stable/10/sys/dev/mlx5/mlx5_en X-SVN-Group: stable-10 X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: stable/10/sys/dev/mlx5/mlx5_en X-SVN-Commit-Revision: 362307 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Jun 2020 10:17:37 -0000 Author: hselasky Date: Thu Jun 18 10:17:36 2020 New Revision: 362307 URL: https://svnweb.freebsd.org/changeset/base/362307 Log: MFC r362043: Use const keyword when parsing the TCP/IP header in the fast path in mlx5en(4). When parsing the TCP/IP header in the fast path, make it clear by using the const keyword, no fields are to be modified inside the transmitted packet. No functional change. Sponsored by: Mellanox Technologies Modified: stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c ============================================================================== --- stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Thu Jun 18 10:12:17 2020 (r362306) +++ stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Thu Jun 18 10:17:36 2020 (r362307) @@ -176,18 +176,26 @@ mlx5e_get_inline_hdr_size(struct mlx5e_sq *sq, struct return (MIN(sq->max_inline, mb->m_pkthdr.len)); } +/* + * This function parse IPv4 and IPv6 packets looking for TCP and UDP + * headers. + * + * The return value indicates the number of bytes from the beginning + * of the packet until the first byte after the TCP or UDP header. If + * this function returns zero, the parsing failed. + */ static int -mlx5e_get_header_size(struct mbuf *mb) +mlx5e_get_header_size(const struct mbuf *mb) { - struct ether_vlan_header *eh; - struct tcphdr *th; - struct ip *ip; + const struct ether_vlan_header *eh; + const struct tcphdr *th; + const struct ip *ip; int ip_hlen, tcp_hlen; - struct ip6_hdr *ip6; + const struct ip6_hdr *ip6; uint16_t eth_type; int eth_hdr_len; - eh = mtod(mb, struct ether_vlan_header *); + eh = mtod(mb, const struct ether_vlan_header *); if (mb->m_len < ETHER_HDR_LEN) return (0); if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { @@ -201,7 +209,7 @@ mlx5e_get_header_size(struct mbuf *mb) return (0); switch (eth_type) { case ETHERTYPE_IP: - ip = (struct ip *)(mb->m_data + eth_hdr_len); + ip = (const struct ip *)(mb->m_data + eth_hdr_len); if (mb->m_len < eth_hdr_len + sizeof(*ip)) return (0); if (ip->ip_p != IPPROTO_TCP) @@ -210,7 +218,7 @@ mlx5e_get_header_size(struct mbuf *mb) eth_hdr_len += ip_hlen; break; case ETHERTYPE_IPV6: - ip6 = (struct ip6_hdr *)(mb->m_data + eth_hdr_len); + ip6 = (const struct ip6_hdr *)(mb->m_data + eth_hdr_len); if (mb->m_len < eth_hdr_len + sizeof(*ip6)) return (0); if (ip6->ip6_nxt != IPPROTO_TCP) @@ -222,7 +230,7 @@ mlx5e_get_header_size(struct mbuf *mb) } if (mb->m_len < eth_hdr_len + sizeof(*th)) return (0); - th = (struct tcphdr *)(mb->m_data + eth_hdr_len); + th = (const struct tcphdr *)(mb->m_data + eth_hdr_len); tcp_hlen = th->th_off << 2; eth_hdr_len += tcp_hlen; if (mb->m_len < eth_hdr_len)