Date: Fri, 27 Jan 2017 23:10:46 +0000 (UTC) From: Hiren Panchasara <hiren@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r312907 - head/sys/netinet Message-ID: <201701272310.v0RNAkdg044117@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hiren Date: Fri Jan 27 23:10:46 2017 New Revision: 312907 URL: https://svnweb.freebsd.org/changeset/base/312907 Log: Add a knob to change default behavior of inheriting listen socket's tcp stack regardless of what the default stack for the system is set to. With current/default behavior, after changing the default tcp stack, the application needs to be restarted to pick up that change. Setting this new knob net.inet.tcp.functions_inherit_listen_socket_stack to '0' would change that behavior and make any new connection use the newly selected default tcp stack. Reviewed by: rrs MFC after: 2 weeks Sponsored by: Limelight Networks Modified: head/sys/netinet/tcp_syncache.c Modified: head/sys/netinet/tcp_syncache.c ============================================================================== --- head/sys/netinet/tcp_syncache.c Fri Jan 27 23:08:30 2017 (r312906) +++ head/sys/netinet/tcp_syncache.c Fri Jan 27 23:10:46 2017 (r312907) @@ -120,6 +120,14 @@ SYSCTL_INT(_net_inet_tcp, OID_AUTO, sync &VNET_NAME(tcp_syncookiesonly), 0, "Use only TCP SYN cookies"); +static VNET_DEFINE(int, functions_inherit_listen_socket_stack) = 1; +#define V_functions_inherit_listen_socket_stack \ + VNET(functions_inherit_listen_socket_stack) +SYSCTL_INT(_net_inet_tcp, OID_AUTO, functions_inherit_listen_socket_stack, + CTLFLAG_VNET | CTLFLAG_RW, + &VNET_NAME(functions_inherit_listen_socket_stack), 0, + "Inherit listen socket's stack"); + #ifdef TCP_OFFLOAD #define ADDED_BY_TOE(sc) ((sc)->sc_tod != NULL) #endif @@ -830,7 +838,7 @@ syncache_socket(struct syncache *sc, str tcp_rcvseqinit(tp); tcp_sendseqinit(tp); blk = sototcpcb(lso)->t_fb; - if (blk != tp->t_fb) { + if (V_functions_inherit_listen_socket_stack && blk != tp->t_fb) { /* * Our parents t_fb was not the default, * we need to release our ref on tp->t_fb and
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201701272310.v0RNAkdg044117>