Date: Thu, 1 Jun 2017 09:21:25 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r319408 - stable/11/sys/netinet Message-ID: <201706010921.v519LPKj043564@repo.freebsd.org>
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Author: tuexen Date: Thu Jun 1 09:21:25 2017 New Revision: 319408 URL: https://svnweb.freebsd.org/changeset/base/319408 Log: MFC r317597: Allow SCTP to use the hostcache. This patch allows the MTU stored in the hostcache to be used as an initial value for SCTP paths. When an ICMP PTB message is received, store the MTU in the hostcache. Modified: stable/11/sys/netinet/sctp_pcb.c stable/11/sys/netinet/sctp_usrreq.c stable/11/sys/netinet/sctputil.c stable/11/sys/netinet/sctputil.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/sctp_pcb.c ============================================================================== --- stable/11/sys/netinet/sctp_pcb.c Thu Jun 1 09:18:03 2017 (r319407) +++ stable/11/sys/netinet/sctp_pcb.c Thu Jun 1 09:21:25 2017 (r319408) @@ -3933,6 +3933,7 @@ sctp_add_remote_addr(struct sctp_tcb *stcb, struct soc stcb->asoc.vrf_id, stcb->sctp_ep->fibnum); + net->src_addr_selected = 0; if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { /* Get source address */ net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, @@ -3942,18 +3943,18 @@ sctp_add_remote_addr(struct sctp_tcb *stcb, struct soc 0, stcb->asoc.vrf_id); if (net->ro._s_addr != NULL) { + uint32_t imtu, rmtu, hcmtu; + net->src_addr_selected = 1; /* Now get the interface MTU */ if (net->ro._s_addr->ifn_p != NULL) { - net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); + imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); + } else { + imtu = 0; } - } else { - net->src_addr_selected = 0; - } - if (net->mtu > 0) { - uint32_t rmtu; - rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); + hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); + net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); if (rmtu == 0) { /* * Start things off to match mtu of @@ -3961,17 +3962,8 @@ sctp_add_remote_addr(struct sctp_tcb *stcb, struct soc */ SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, net->ro.ro_rt, net->mtu); - } else { - /* - * we take the route mtu over the interface, - * since the route may be leading out the - * loopback, or a different interface. - */ - net->mtu = rmtu; } } - } else { - net->src_addr_selected = 0; } if (net->mtu == 0) { switch (newaddr->sa_family) { Modified: stable/11/sys/netinet/sctp_usrreq.c ============================================================================== --- stable/11/sys/netinet/sctp_usrreq.c Thu Jun 1 09:18:03 2017 (r319407) +++ stable/11/sys/netinet/sctp_usrreq.c Thu Jun 1 09:21:25 2017 (r319408) @@ -225,6 +225,11 @@ sctp_notify(struct sctp_inpcb *inp, } if (net->mtu > next_mtu) { net->mtu = next_mtu; + if (net->port) { + sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); + } else { + sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); + } } /* Update the association MTU */ if (stcb->asoc.smallest_mtu > next_mtu) { Modified: stable/11/sys/netinet/sctputil.c ============================================================================== --- stable/11/sys/netinet/sctputil.c Thu Jun 1 09:18:03 2017 (r319407) +++ stable/11/sys/netinet/sctputil.c Thu Jun 1 09:21:25 2017 (r319408) @@ -49,6 +49,9 @@ __FBSDID("$FreeBSD$"); #include <netinet/sctp_auth.h> #include <netinet/sctp_asconf.h> #include <netinet/sctp_bsd_addr.h> +#if defined(INET6) || defined(INET) +#include <netinet/tcp_var.h> +#endif #include <netinet/udp.h> #include <netinet/udp_var.h> #include <sys/proc.h> @@ -7235,3 +7238,90 @@ sctp_over_udp_start(void) #endif return (0); } + +#if defined(INET6) || defined(INET) + +/* + * sctp_min_mtu ()returns the minimum of all non-zero arguments. + * If all arguments are zero, zero is returned. + */ +uint32_t +sctp_min_mtu(uint32_t mtu1, uint32_t mtu2, uint32_t mtu3) +{ + if (mtu1 > 0) { + if (mtu2 > 0) { + if (mtu3 > 0) { + return (min(mtu1, min(mtu2, mtu3))); + } else { + return (min(mtu1, mtu2)); + } + } else { + if (mtu3 > 0) { + return (min(mtu1, mtu3)); + } else { + return (mtu1); + } + } + } else { + if (mtu2 > 0) { + if (mtu3 > 0) { + return (min(mtu2, mtu3)); + } else { + return (mtu2); + } + } else { + return (mtu3); + } + } +} + +void +sctp_hc_set_mtu(union sctp_sockstore *addr, uint16_t fibnum, uint32_t mtu) +{ + struct in_conninfo inc; + + memset(&inc, 0, sizeof(struct in_conninfo)); + inc.inc_fibnum = fibnum; + switch (addr->sa.sa_family) { +#ifdef INET + case AF_INET: + inc.inc_faddr = addr->sin.sin_addr; + break; +#endif +#ifdef INET6 + case AF_INET6: + inc.inc_flags |= INC_ISIPV6; + inc.inc6_faddr = addr->sin6.sin6_addr; + break; +#endif + default: + return; + } + tcp_hc_updatemtu(&inc, (u_long)mtu); +} + +uint32_t +sctp_hc_get_mtu(union sctp_sockstore *addr, uint16_t fibnum) +{ + struct in_conninfo inc; + + memset(&inc, 0, sizeof(struct in_conninfo)); + inc.inc_fibnum = fibnum; + switch (addr->sa.sa_family) { +#ifdef INET + case AF_INET: + inc.inc_faddr = addr->sin.sin_addr; + break; +#endif +#ifdef INET6 + case AF_INET6: + inc.inc_flags |= INC_ISIPV6; + inc.inc6_faddr = addr->sin6.sin6_addr; + break; +#endif + default: + return (0); + } + return ((uint32_t)tcp_hc_getmtu(&inc)); +} +#endif Modified: stable/11/sys/netinet/sctputil.h ============================================================================== --- stable/11/sys/netinet/sctputil.h Thu Jun 1 09:18:03 2017 (r319407) +++ stable/11/sys/netinet/sctputil.h Thu Jun 1 09:21:25 2017 (r319408) @@ -388,5 +388,10 @@ sctp_auditing(int, struct sctp_inpcb *, struct sctp_tc void sctp_audit_log(uint8_t, uint8_t); #endif +#if defined(INET6) || defined(INET) +uint32_t sctp_min_mtu(uint32_t, uint32_t, uint32_t); +void sctp_hc_set_mtu(union sctp_sockstore *, uint16_t, uint32_t); +uint32_t sctp_hc_get_mtu(union sctp_sockstore *, uint16_t); +#endif #endif /* _KERNEL */ #endif
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