Module Name: src Committed By: knakahara Date: Fri Sep 24 04:11:02 UTC 2021
Modified Files: src/sys/net: rss_config.c rss_config.h Log Message: Add RSS toeplitz hash functions which calculate from mbuf. To generate a diff of this commit: cvs rdiff -u -r1.2 -r1.3 src/sys/net/rss_config.c cvs rdiff -u -r1.1 -r1.2 src/sys/net/rss_config.h Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/net/rss_config.c diff -u src/sys/net/rss_config.c:1.2 src/sys/net/rss_config.c:1.3 --- src/sys/net/rss_config.c:1.2 Wed Nov 20 08:17:01 2019 +++ src/sys/net/rss_config.c Fri Sep 24 04:11:02 2021 @@ -1,4 +1,4 @@ -/* $NetBSD: rss_config.c,v 1.2 2019/11/20 08:17:01 knakahara Exp $ */ +/* $NetBSD: rss_config.c,v 1.3 2021/09/24 04:11:02 knakahara Exp $ */ /* * Copyright (c) 2018 Internet Initiative Japan Inc. @@ -27,13 +27,21 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: rss_config.c,v 1.2 2019/11/20 08:17:01 knakahara Exp $"); +__KERNEL_RCSID(0, "$NetBSD: rss_config.c,v 1.3 2021/09/24 04:11:02 knakahara Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> +#include <sys/mbuf.h> #include <net/rss_config.h> +#include <net/toeplitz.h> + +#include <netinet/in.h> +#include <netinet/ip.h> +#include <netinet/tcp.h> +#include <netinet/udp.h> +#include <netinet/ip6.h> /* * Same as FreeBSD. @@ -75,3 +83,201 @@ rss_getkey(uint8_t *key) memcpy(key, rss_default_key, sizeof(rss_default_key)); } + +/* + * Calculate rss hash value from IPv4 mbuf. + * This function should be called before ip_input(). + */ +uint32_t +rss_toeplitz_hash_from_mbuf_ipv4(const struct mbuf *m, u_int flag) +{ + struct ip *ip; + int hlen; + uint8_t key[RSS_KEYSIZE]; + + KASSERT((m->m_flags & M_PKTHDR) != 0); + KASSERT(m->m_len >= sizeof (struct ip)); + + ip = mtod(m, struct ip *); + KASSERT(ip->ip_v == IPVERSION); + + hlen = ip->ip_hl << 2; + if (hlen < sizeof(struct ip)) + return 0; + + rss_getkey(key); + + switch (ip->ip_p) { + case IPPROTO_TCP: + { + if ((flag & RSS_TOEPLITZ_USE_TCP_PORT) != 0) { + if (m->m_len >= hlen + sizeof(struct tcphdr)) { + struct tcphdr *th; + + th = (struct tcphdr *)(mtod(m, char *) + hlen); + return toeplitz_vhash(key, sizeof(key), + /* ip_src and ip_dst in struct ip must be sequential */ + &ip->ip_src, sizeof(ip->ip_src) * 2, + /* th_sport and th_dport in tcphdr must be sequential */ + &th->th_sport, sizeof(th->th_sport) * 2, + NULL); + } else if (m->m_pkthdr.len >= hlen + sizeof(struct tcphdr)) { + uint16_t ports[2]; + + /* ditto */ + m_copydata(__UNCONST(m), hlen + offsetof(struct tcphdr, th_sport), + sizeof(ports), ports); + return toeplitz_vhash(key, sizeof(key), + &ip->ip_src, sizeof(ip->ip_src) * 2, + ports, sizeof(ports), + NULL); + } + } + /* + * Treat as raw packet. + */ + return toeplitz_vhash(key, sizeof(key), + /* ditto */ + &ip->ip_src, sizeof(ip->ip_src) * 2, + NULL); + } + case IPPROTO_UDP: + { + if ((flag & RSS_TOEPLITZ_USE_UDP_PORT) != 0) { + if (m->m_len >= hlen + sizeof(struct udphdr)) { + struct udphdr *uh; + + uh = (struct udphdr *)(mtod(m, char *) + hlen); + return toeplitz_vhash(key, sizeof(key), + /* ip_src and ip_dst in struct ip must sequential */ + &ip->ip_src, sizeof(ip->ip_src) * 2, + /* uh_sport and uh_dport in udphdr must be sequential */ + &uh->uh_sport, sizeof(uh->uh_sport) * 2, + NULL); + } else if (m->m_pkthdr.len >= hlen + sizeof(struct udphdr)) { + uint16_t ports[2]; + + /* ditto */ + m_copydata(__UNCONST(m), hlen + offsetof(struct udphdr, uh_sport), + sizeof(ports), ports); + return toeplitz_vhash(key, sizeof(key), + &ip->ip_src, sizeof(ip->ip_src) * 2, + ports, sizeof(ports), + NULL); + } + } + /* + * Treat as raw packet. + */ + return toeplitz_vhash(key, sizeof(key), + /* ditto */ + &ip->ip_src, sizeof(ip->ip_src) * 2, + NULL); + } + /* + * Other protocols are treated as raw packets to apply RPS. + */ + default: + return toeplitz_vhash(key, sizeof(key), + /* ditto */ + &ip->ip_src, sizeof(ip->ip_src) * 2, + NULL); + } +} + +/* + * Calculate rss hash value from IPv6 mbuf. + * This function should be called before ip6_input(). + */ +uint32_t +rss_toeplitz_hash_from_mbuf_ipv6(const struct mbuf *m, u_int flag) +{ + struct ip6_hdr *ip6; + int hlen; + uint8_t key[RSS_KEYSIZE]; + + KASSERT((m->m_flags & M_PKTHDR) != 0); + KASSERT(m->m_len >= sizeof (struct ip6_hdr)); + + ip6 = mtod(m, struct ip6_hdr *); + KASSERT((ip6->ip6_vfc & IPV6_VERSION_MASK) == IPV6_VERSION); + + hlen = sizeof(struct ip6_hdr); + rss_getkey(key); + + switch (ip6->ip6_nxt) { + case IPPROTO_TCP: + { + if ((flag & RSS_TOEPLITZ_USE_TCP_PORT) != 0) { + if (m->m_len >= hlen + sizeof(struct tcphdr)) { + struct tcphdr *th; + + th = (struct tcphdr *)(mtod(m, char *) + hlen); + return toeplitz_vhash(key, sizeof(key), + /* ip6_src and ip6_dst in ip6_hdr must be sequential */ + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + /* th_sport and th_dport in tcphdr must be sequential */ + &th->th_sport, sizeof(th->th_sport) * 2, + NULL); + } else if (m->m_pkthdr.len >= hlen + sizeof(struct tcphdr)) { + uint16_t ports[2]; + + /* ditto */ + m_copydata(__UNCONST(m), hlen + offsetof(struct tcphdr, th_sport), + sizeof(ports), ports); + return toeplitz_vhash(key, sizeof(key), + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + ports, sizeof(ports), + NULL); + } + } + /* + * Treat as raw packet. + */ + return toeplitz_vhash(key, sizeof(key), + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + NULL); + } + case IPPROTO_UDP: + { + if ((flag & RSS_TOEPLITZ_USE_UDP_PORT) != 0) { + if (m->m_len >= hlen + sizeof(struct udphdr)) { + struct udphdr *uh; + + uh = (struct udphdr *)(mtod(m, char *) + hlen); + return toeplitz_vhash(key, sizeof(key), + /* ip6_src and ip6_dst in ip6_hdr must sequential */ + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + /* uh_sport and uh_dport in udphdr must be sequential */ + &uh->uh_sport, sizeof(uh->uh_sport) * 2, + NULL); + } else if (m->m_pkthdr.len >= hlen + sizeof(struct udphdr)) { + uint16_t ports[2]; + + /* ditto */ + m_copydata(__UNCONST(m), hlen + offsetof(struct udphdr, uh_sport), + sizeof(ports), ports); + return toeplitz_vhash(key, sizeof(key), + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + &ports, sizeof(ports), + NULL); + } + } + /* + * Treat as raw packet. + */ + return toeplitz_vhash(key, sizeof(key), + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + NULL); + } + /* + * Other protocols are treated as raw packets to apply RPS. + */ + default: + return toeplitz_vhash(key, sizeof(key), + &ip6->ip6_src, sizeof(ip6->ip6_src) * 2, + NULL); + } + + return 0; +} Index: src/sys/net/rss_config.h diff -u src/sys/net/rss_config.h:1.1 src/sys/net/rss_config.h:1.2 --- src/sys/net/rss_config.h:1.1 Fri Feb 16 04:48:32 2018 +++ src/sys/net/rss_config.h Fri Sep 24 04:11:02 2021 @@ -1,4 +1,4 @@ -/* $NetBSD: rss_config.h,v 1.1 2018/02/16 04:48:32 knakahara Exp $ */ +/* $NetBSD: rss_config.h,v 1.2 2021/09/24 04:11:02 knakahara Exp $ */ /* * Copyright (c) 2018 Internet Initiative Japan Inc. @@ -31,6 +31,12 @@ #define RSS_KEYSIZE 40 +#define RSS_TOEPLITZ_USE_TCP_PORT __BIT(0) +#define RSS_TOEPLITZ_USE_UDP_PORT __BIT(1) + void rss_getkey(uint8_t *); +uint32_t rss_toeplitz_hash_from_mbuf_ipv4(const struct mbuf *, u_int); +uint32_t rss_toeplitz_hash_from_mbuf_ipv6(const struct mbuf *, u_int); + #endif /* _NET_RSS_CONFIG_H_ */