diff options
Diffstat (limited to 'sys/netinet/tcp_timewait.c')
| -rw-r--r-- | sys/netinet/tcp_timewait.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c index b5cfd43..c1add3f 100644 --- a/sys/netinet/tcp_timewait.c +++ b/sys/netinet/tcp_timewait.c @@ -36,6 +36,7 @@ #include "opt_ipsec.h" #include "opt_mac.h" #include "opt_tcpdebug.h" +#include "opt_tcp_sack.h" #include <sys/param.h> #include <sys/systm.h> @@ -201,6 +202,17 @@ static int tcp_inflight_stab = 20; SYSCTL_INT(_net_inet_tcp, OID_AUTO, inflight_stab, CTLFLAG_RW, &tcp_inflight_stab, 0, "Inflight Algorithm Stabilization 20 = 2 packets"); + +int tcp_do_sack = 1; +SYSCTL_INT(_net_inet_tcp, OID_AUTO, do_sack, CTLFLAG_RW, + &tcp_do_sack, 0, "Enable/Disable TCP SACK support"); + +int tcp_sackhole_limit = 10 * 1024; /* Arbitrarily set */ +SYSCTL_INT(_net_inet_tcp, OID_AUTO, sackhole_limit, CTLFLAG_RW, + &tcp_sackhole_limit, 0, "Limit on the total SACK scoreboard elements"); + +uma_zone_t sack_hole_zone; + static struct inpcb *tcp_notify(struct inpcb *, int); static void tcp_discardcb(struct tcpcb *); static void tcp_isn_tick(void *); @@ -292,6 +304,8 @@ tcp_init() tcp_isn_tick(NULL); EVENTHANDLER_REGISTER(shutdown_pre_sync, tcp_fini, NULL, SHUTDOWN_PRI_DEFAULT); + sack_hole_zone = uma_zcreate("sackhole", sizeof(struct sackhole), + NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); } void @@ -606,6 +620,7 @@ tcp_newtcpcb(inp) tp->t_flags = (TF_REQ_SCALE|TF_REQ_TSTMP); if (tcp_do_rfc1644) tp->t_flags |= TF_REQ_CC; + tp->sack_enable = tcp_do_sack; tp->t_inpcb = inp; /* XXX */ /* * Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no @@ -739,6 +754,7 @@ tcp_discardcb(tp) tp->t_segqlen--; tcp_reass_qsize--; } + tcp_free_sackholes(tp); inp->inp_ppcb = NULL; tp->t_inpcb = NULL; uma_zfree(tcpcb_zone, tp); |
