Date: Sat, 20 Aug 2016 22:12:27 +0000 (UTC) From: Marko Zec <zec@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r304548 - head/sys/netinet Message-ID: <201608202212.u7KMCRQU065106@repo.freebsd.org>
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Author: zec Date: Sat Aug 20 22:12:26 2016 New Revision: 304548 URL: https://svnweb.freebsd.org/changeset/base/304548 Log: Permit disabling net.inet.udp.require_l2_bcast in VIMAGE kernels. The default value of the tunable introduced in r304436 couldn't be effectively overrided on VIMAGE kernels, because instead of being accessed via the appropriate VNET() accessor macro, it was accessed via the VNET_NAME() macro, which resolves to the (should-be) read-only master template of initial values of per-VNET data. Hence, while the value of udp_require_l2_bcast could be altered on per-VNET basis, the code in udp_input() would ignore it as it would always read the default value (one) from the VNET master template. Silence from: rstone Modified: head/sys/netinet/udp_usrreq.c Modified: head/sys/netinet/udp_usrreq.c ============================================================================== --- head/sys/netinet/udp_usrreq.c Sat Aug 20 21:34:41 2016 (r304547) +++ head/sys/netinet/udp_usrreq.c Sat Aug 20 22:12:26 2016 (r304548) @@ -127,6 +127,7 @@ SYSCTL_INT(_net_inet_udp, OID_AUTO, blac "Do not send port unreachables for refused connects"); static VNET_DEFINE(int, udp_require_l2_bcast) = 1; +#define V_udp_require_l2_bcast VNET(udp_require_l2_bcast) SYSCTL_INT(_net_inet_udp, OID_AUTO, require_l2_bcast, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(udp_require_l2_bcast), 0, "Only treat packets sent to an L2 broadcast address as broadcast packets"); @@ -528,7 +529,7 @@ udp_input(struct mbuf **mp, int *offp, i pcbinfo = udp_get_inpcbinfo(proto); if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || - ((!VNET_NAME(udp_require_l2_bcast) || m->m_flags & M_BCAST) && + ((!V_udp_require_l2_bcast || m->m_flags & M_BCAST) && in_broadcast(ip->ip_dst, ifp))) { struct inpcb *last; struct inpcbhead *pcblist;
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