tcp_timer.c File Reference

#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_tcpdebug.h"
#include "opt_rss.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/protosw.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/route.h>
#include <net/rss_config.h>
#include <net/vnet.h>
#include <net/netisr.h>
#include <netinet/in.h>
#include <netinet/in_kdtrace.h>
#include <netinet/in_pcb.h>
#include <netinet/in_rss.h>
#include <netinet/in_systm.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_log_buf.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_seq.h>
#include <netinet/cc/cc.h>
#include <netinet/tcpip.h>

Include dependency graph for tcp_timer.c:

Go to the source code of this file.

Functions
	__FBSDID ("$FreeBSD$")
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, persmin, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_persmin, 0, sysctl_msec_to_ticks, "I", "minimum persistence interval")
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, persmax, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_persmax, 0, sysctl_msec_to_ticks, "I", "maximum persistence interval")
	SYSCTL_PROC (_net_inet_tcp, TCPCTL_KEEPINIT, keepinit, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_keepinit, 0, sysctl_msec_to_ticks, "I", "time to establish connection")
	SYSCTL_PROC (_net_inet_tcp, TCPCTL_KEEPIDLE, keepidle, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_keepidle, 0, sysctl_msec_to_ticks, "I", "time before keepalive probes begin")
	SYSCTL_PROC (_net_inet_tcp, TCPCTL_KEEPINTVL, keepintvl, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_keepintvl, 0, sysctl_msec_to_ticks, "I", "time between keepalive probes")
	SYSCTL_PROC (_net_inet_tcp, TCPCTL_DELACKTIME, delacktime, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_delacktime, 0, sysctl_msec_to_ticks, "I", "Time before a delayed ACK is sent")
	VNET_DEFINE (int, tcp_msl)
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, msl, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_VNET, &VNET_NAME(tcp_msl), 0, sysctl_msec_to_ticks, "I", "Maximum segment lifetime")
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, rexmit_initial, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_rexmit_initial, 0, sysctl_msec_to_ticks, "I", "Initial Retransmission Timeout")
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, rexmit_min, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_rexmit_min, 0, sysctl_msec_to_ticks, "I", "Minimum Retransmission Timeout")
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, rexmit_slop, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_rexmit_slop, 0, sysctl_msec_to_ticks, "I", "Retransmission Timer Slop")
	VNET_DEFINE (int, tcp_always_keepalive)
	SYSCTL_INT (_net_inet_tcp, OID_AUTO, always_keepalive, CTLFLAG_VNET|CTLFLAG_RW, &VNET_NAME(tcp_always_keepalive), 0, "Assume SO_KEEPALIVE on all TCP connections")
	SYSCTL_INT (_net_inet_tcp, OID_AUTO, fast_finwait2_recycle, CTLFLAG_RW, &tcp_fast_finwait2_recycle, 0, "Recycle closed FIN_WAIT_2 connections faster")
	SYSCTL_PROC (_net_inet_tcp, OID_AUTO, finwait2_timeout, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_NEEDGIANT, &tcp_finwait2_timeout, 0, sysctl_msec_to_ticks, "I", "FIN-WAIT2 timeout")
	SYSCTL_INT (_net_inet_tcp, OID_AUTO, keepcnt, CTLFLAG_RW, &tcp_keepcnt, 0, "Number of keepalive probes to send")
	SYSCTL_INT (_net_inet_tcp, OID_AUTO, rexmit_drop_options, CTLFLAG_RW, &tcp_rexmit_drop_options, 0, "Drop TCP options from 3rd and later retransmitted SYN")
	VNET_DEFINE (int, tcp_pmtud_blackhole_detect)
	SYSCTL_INT (_net_inet_tcp, OID_AUTO, pmtud_blackhole_detection, CTLFLAG_RW|CTLFLAG_VNET, &VNET_NAME(tcp_pmtud_blackhole_detect), 0, "Path MTU Discovery Black Hole Detection Enabled")
	SYSCTL_INT (_net_inet_tcp, OID_AUTO, per_cpu_timers, CTLFLAG_RW, &per_cpu_timers, 0, "run tcp timers on all cpus")
int	inp_to_cpuid (struct inpcb *inp)
void	tcp_slowtimo (void)
void	tcp_timer_delack (void *xtp)
void	tcp_inpinfo_lock_del (struct inpcb *inp, struct tcpcb *tp)
void	tcp_timer_2msl (void *xtp)
void	tcp_timer_keep (void *xtp)
void	tcp_timer_persist (void *xtp)
void	tcp_timer_rexmt (void *xtp)
void	tcp_timer_activate (struct tcpcb *tp, uint32_t timer_type, u_int delta)
int	tcp_timer_active (struct tcpcb *tp, uint32_t timer_type)
int	tcp_timer_suspend (struct tcpcb *tp, uint32_t timer_type)
void	tcp_timers_unsuspend (struct tcpcb *tp, uint32_t timer_type)
static void	tcp_timer_discard (void *ptp)
void	tcp_timer_stop (struct tcpcb *tp, uint32_t timer_type)

Variables
int	tcp_persmin
int	tcp_persmax
int	tcp_keepinit
int	tcp_keepidle
int	tcp_keepintvl
int	tcp_delacktime
int	tcp_rexmit_initial
int	tcp_rexmit_min
int	tcp_rexmit_slop
int	tcp_fast_finwait2_recycle = 0
int	tcp_finwait2_timeout
int	tcp_keepcnt = TCPTV_KEEPCNT
int	tcp_maxpersistidle
int	tcp_rexmit_drop_options = 0
static int	per_cpu_timers = 0
int	tcp_backoff [TCP_MAXRXTSHIFT+1]
int	tcp_totbackoff = 2559

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

inp_to_cpuid()

int inp_to_cpuid ( struct inpcb *  inp )

inline

Definition at line 209 of file tcp_timer.c.

References inpcb::inp_flowid, inpcb::inp_flowtype, and per_cpu_timers.

Referenced by tcp_timer_activate().

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SYSCTL_INT() [1/6]

SYSCTL_INT	(	_net_inet_tcp	,
		OID_AUTO	,
		always_keepalive	,
		CTLFLAG_VNET|	CTLFLAG_RW,
		&	VNET_NAMEtcp_always_keepalive,
		0	,
		"Assume SO_KEEPALIVE on all TCP connections"
	)

SYSCTL_INT() [2/6]

SYSCTL_INT	(	_net_inet_tcp	,
		OID_AUTO	,
		fast_finwait2_recycle	,
		CTLFLAG_RW	,
		&	tcp_fast_finwait2_recycle,
		0	,
		"Recycle closed FIN_WAIT_2 connections faster"
	)

SYSCTL_INT() [3/6]

SYSCTL_INT	(	_net_inet_tcp	,
		OID_AUTO	,
		keepcnt	,
		CTLFLAG_RW	,
		&	tcp_keepcnt,
		0	,
		"Number of keepalive probes to send"
	)

SYSCTL_INT() [4/6]

SYSCTL_INT	(	_net_inet_tcp	,
		OID_AUTO	,
		per_cpu_timers	,
		CTLFLAG_RW	,
		&	per_cpu_timers,
		0	,
		"run tcp timers on all cpus"
	)

SYSCTL_INT() [5/6]

SYSCTL_INT	(	_net_inet_tcp	,
		OID_AUTO	,
		pmtud_blackhole_detection	,
		CTLFLAG_RW|	CTLFLAG_VNET,
		&	VNET_NAMEtcp_pmtud_blackhole_detect,
		0	,
		"Path MTU Discovery Black Hole Detection Enabled"
	)

SYSCTL_INT() [6/6]

SYSCTL_INT	(	_net_inet_tcp	,
		OID_AUTO	,
		rexmit_drop_options	,
		CTLFLAG_RW	,
		&	tcp_rexmit_drop_options,
		0	,
		"Drop TCP options from 3rd and later retransmitted SYN"
	)

SYSCTL_PROC() [1/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		finwait2_timeout	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_finwait2_timeout,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"FIN-WAIT2 timeout"
	)

SYSCTL_PROC() [2/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		msl	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_VNET,
		&	VNET_NAMEtcp_msl,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"Maximum segment lifetime"
	)

SYSCTL_PROC() [3/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		persmax	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_persmax,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"maximum persistence interval"
	)

SYSCTL_PROC() [4/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		persmin	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_persmin,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"minimum persistence interval"
	)

SYSCTL_PROC() [5/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		rexmit_initial	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_rexmit_initial,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"Initial Retransmission Timeout"
	)

SYSCTL_PROC() [6/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		rexmit_min	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_rexmit_min,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"Minimum Retransmission Timeout"
	)

SYSCTL_PROC() [7/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		OID_AUTO	,
		rexmit_slop	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_rexmit_slop,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"Retransmission Timer Slop"
	)

SYSCTL_PROC() [8/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		TCPCTL_DELACKTIME	,
		delacktime	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_delacktime,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"Time before a delayed ACK is sent"
	)

SYSCTL_PROC() [9/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		TCPCTL_KEEPIDLE	,
		keepidle	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_keepidle,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"time before keepalive probes begin"
	)

SYSCTL_PROC() [10/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		TCPCTL_KEEPINIT	,
		keepinit	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_keepinit,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"time to establish connection"
	)

SYSCTL_PROC() [11/11]

SYSCTL_PROC	(	_net_inet_tcp	,
		TCPCTL_KEEPINTVL	,
		keepintvl	,
		CTLTYPE_INT|CTLFLAG_RW|	CTLFLAG_NEEDGIANT,
		&	tcp_keepintvl,
		0	,
		sysctl_msec_to_ticks	,
		"I"	,
		"time between keepalive probes"
	)

tcp_inpinfo_lock_del()

void tcp_inpinfo_lock_del	(	struct inpcb *	inp,
		struct tcpcb *	tp
	)

Definition at line 295 of file tcp_timer.c.

References INP_WUNLOCK.

Referenced by tcp_timer_2msl(), tcp_timer_keep(), tcp_timer_persist(), and tcp_timer_rexmt().

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tcp_slowtimo()

void tcp_slowtimo

(

void

)

Definition at line 241 of file tcp_timer.c.

References tcp_tw_2msl_scan().

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tcp_timer_2msl()

void tcp_timer_2msl

(

void *

xtp

)

Definition at line 302 of file tcp_timer.c.

References INP_DROPPED, inpcb::inp_flags, inpcb::inp_socket, INP_TIMEWAIT, INP_WLOCK, INP_WUNLOCK, tcpcb::t_inpcb, tcpcb::t_rcvtime, tcpcb::t_state, tcpcb::t_timers, tcpcb::t_vnet, TA_USER, tcp_close(), tcp_fast_finwait2_recycle, tcp_free_sackholes(), tcp_inpinfo_lock_del(), TCP_PROBE2, tcp_timer_2msl(), tcp_trace(), TCPS_FIN_WAIT_2, TCPSTAT_INC, TP_KEEPINTVL, TP_MAXIDLE, tcp_timer::tt_2msl, tcp_timer::tt_flags, and TT_STOPPED.

Referenced by tcp_timer_2msl(), and tcp_timer_activate().

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tcp_timer_activate()

void tcp_timer_activate	(	struct tcpcb *	tp,
		uint32_t	timer_type,
		u_int	delta
	)

Definition at line 854 of file tcp_timer.c.

References inp_to_cpuid(), tcpcb::t_fb, tcpcb::t_flags, tcpcb::t_inpcb, tcpcb::t_timers, tcp_timer_2msl(), tcp_timer_delack(), tcp_timer_keep(), tcp_timer_persist(), tcp_timer_rexmt(), TF_TOE, tcp_function_block::tfb_tcp_timer_activate, tcp_timer::tt_2msl, TT_2MSL, tcp_timer::tt_delack, TT_DELACK, tcp_timer::tt_flags, tcp_timer::tt_keep, TT_KEEP, tcp_timer::tt_persist, TT_PERSIST, tcp_timer::tt_rexmt, TT_REXMT, and TT_STOPPED.

Referenced by bbr_do_fin_wait_1(), bbr_do_syn_recv(), bbr_do_syn_sent(), cc_ecnpkt_handler_flags(), rack_do_compressed_ack_processing(), rack_do_fin_wait_1(), rack_do_syn_recv(), rack_do_syn_sent(), syncache_socket(), tcp_default_ctloutput(), tcp_default_fb_init(), tcp_default_output(), tcp_do_segment(), tcp_newreno_partial_ack(), tcp_sack_partialack(), tcp_setpersist(), tcp_timers_unsuspend(), tcp_usrclosed(), and toe_connect_failed().

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tcp_timer_active()

int tcp_timer_active	(	struct tcpcb *	tp,
		uint32_t	timer_type
	)

Definition at line 905 of file tcp_timer.c.

References tcpcb::t_fb, tcpcb::t_timers, tcp_function_block::tfb_tcp_timer_active, tcp_timer::tt_2msl, TT_2MSL, tcp_timer::tt_delack, TT_DELACK, tcp_timer::tt_keep, TT_KEEP, tcp_timer::tt_persist, TT_PERSIST, tcp_timer::tt_rexmt, and TT_REXMT.

Referenced by bbr_stop_all_timers(), rack_stop_all_timers(), tcp_default_fb_init(), tcp_default_output(), tcp_do_segment(), tcp_setpersist(), and tcp_timers_unsuspend().

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tcp_timer_delack()

void tcp_timer_delack

(

void *

xtp

)

Definition at line 264 of file tcp_timer.c.

References INP_DROPPED, inpcb::inp_flags, INP_WLOCK, INP_WUNLOCK, tcpcb::t_flags, tcpcb::t_inpcb, tcpcb::t_timers, tcpcb::t_vnet, TCPSTAT_INC, TF_ACKNOW, and tcp_timer::tt_delack.

Referenced by tcp_timer_activate().

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tcp_timer_discard()

static void tcp_timer_discard ( void *  ptp )

static

Definition at line 1040 of file tcp_timer.c.

References INP_WLOCK, INP_WUNLOCK, tcpcb::t_inpcb, tcpcb::t_timers, tcpcb::t_vnet, tcp_freecb(), tcp_timer::tt_draincnt, tcp_timer::tt_flags, and TT_STOPPED.

Referenced by tcp_timer_stop().

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tcp_timer_keep()

void tcp_timer_keep

(

void *

xtp

)

Definition at line 377 of file tcp_timer.c.

References INP_DROPPED, inpcb::inp_flags, inpcb::inp_socket, INP_TIMEWAIT, INP_WLOCK, INP_WUNLOCK, tcpcb::rcv_nxt, tcpcb::snd_una, tcpcb::t_inpcb, tcpcb::t_rcvtime, tcpcb::t_state, tcpcb::t_timers, tcpcb::t_vnet, TA_USER, tcp_drop(), tcp_inpinfo_lock_del(), TCP_PROBE2, tcp_respond(), tcp_timer_keep(), tcp_trace(), tcpip_maketemplate(), TCPS_CLOSING, TCPS_ESTABLISHED, TCPS_HAVEESTABLISHED, TCPSTAT_INC, TP_KEEPIDLE, TP_KEEPINTVL, TP_MAXIDLE, tcp_timer::tt_flags, tcptemp::tt_ipgen, tcp_timer::tt_keep, TT_STOPPED, tcptemp::tt_t, and V_tcp_always_keepalive.

Referenced by tcp_timer_activate(), and tcp_timer_keep().

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tcp_timer_persist()

void tcp_timer_persist

(

void *

xtp

)

Definition at line 493 of file tcp_timer.c.

References INP_DROPPED, inpcb::inp_flags, inpcb::inp_socket, INP_TIMEWAIT, INP_WLOCK, INP_WUNLOCK, tcpcb::t_flags, tcpcb::t_inpcb, tcpcb::t_rcvtime, tcpcb::t_rxtshift, tcpcb::t_state, tcpcb::t_timers, tcpcb::t_vnet, TA_USER, tcp_drop(), tcp_inpinfo_lock_del(), tcp_maxpersistidle, TCP_MAXRXTSHIFT, TCP_PROBE2, TCP_REXMTVAL, tcp_setpersist(), tcp_totbackoff, tcp_trace(), TCPS_CLOSE_WAIT, TCPSTAT_INC, TCPTV_PERSMAX, TF_FORCEDATA, tcp_timer::tt_flags, tcp_timer::tt_persist, and TT_STOPPED.

Referenced by tcp_timer_activate().

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tcp_timer_rexmt()

void tcp_timer_rexmt

(

void *

xtp

)

Definition at line 575 of file tcp_timer.c.

References CC_ALGO, cc_cong_signal(), CC_RTO, tcpcb::ccv, IN_CONGRECOVERY, IN_FASTRECOVERY, in_losing(), INP_DROPPED, inpcb::inp_flags, INP_IPV6, inpcb::inp_socket, INP_TIMEWAIT, inpcb::inp_vflag, INP_WLOCK, INP_WUNLOCK, tcpcb::snd_cwnd, tcpcb::snd_cwnd_prev, tcpcb::snd_max, tcpcb::snd_nxt, tcpcb::snd_recover, tcpcb::snd_recover_prev, tcpcb::snd_ssthresh, tcpcb::snd_ssthresh_prev, tcpcb::snd_una, tcpcb::t_badrxtwin, tcpcb::t_blackhole_enter, tcpcb::t_blackhole_exit, tcpcb::t_fb, tcpcb::t_flags, tcpcb::t_flags2, tcpcb::t_inpcb, tcpcb::t_maxseg, tcpcb::t_pmtud_saved_maxseg, tcpcb::t_rttmin, tcpcb::t_rtttime, tcpcb::t_rxtcur, tcpcb::t_rxtshift, tcpcb::t_srtt, tcpcb::t_state, tcpcb::t_timers, tcpcb::t_vnet, TA_USER, tcp_backoff, tcp_drop(), tcp_free_sackholes(), tcp_inpinfo_lock_del(), TCP_LOG_EVENT, TCP_LOG_RTO, TCP_MAXRXTSHIFT, TCP_PROBE2, tcp_rexmit_drop_options, tcp_rexmit_initial, TCP_REXMTVAL, TCP_RTT_INVALIDATE, TCP_RTT_SHIFT, tcp_trace(), TCPS_ESTABLISHED, TCPS_FIN_WAIT_1, TCPS_SYN_RECEIVED, TCPS_SYN_SENT, TCPSTAT_INC, TCPT_RANGESET, TCPTV_REXMTMAX, TF2_PLPMTU_BLACKHOLE, TF2_PLPMTU_MAXSEGSNT, TF2_PLPMTU_PMTUD, TF_ACKNOW, TF_PREVVALID, TF_RCVD_TSTMP, TF_REQ_SCALE, TF_REQ_TSTMP, TF_SACK_PERMIT, TF_WASCRECOVERY, TF_WASFRECOVERY, tcp_function_block::tfb_tcp_rexmit_tmr, tcp_timer::tt_flags, tcp_timer::tt_rexmt, TT_STOPPED, V_tcp_mssdflt, V_tcp_pmtud_blackhole_detect, V_tcp_pmtud_blackhole_mss, and V_tcp_v6pmtud_blackhole_mss.

Referenced by tcp_timer_activate().

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tcp_timer_stop()

void tcp_timer_stop	(	struct tcpcb *	tp,
		uint32_t	timer_type
	)

Definition at line 1063 of file tcp_timer.c.

References tcpcb::t_fb, tcpcb::t_timers, tcp_timer_discard(), tcp_function_block::tfb_tcp_timer_stop, tcp_timer::tt_2msl, TT_2MSL, tcp_timer::tt_delack, TT_DELACK, tcp_timer::tt_draincnt, tcp_timer::tt_flags, tcp_timer::tt_keep, TT_KEEP, tcp_timer::tt_persist, TT_PERSIST, tcp_timer::tt_rexmt, TT_REXMT, and TT_STOPPED.

Referenced by tcp_discardcb().

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tcp_timer_suspend()

int tcp_timer_suspend	(	struct tcpcb *	tp,
		uint32_t	timer_type
	)

Definition at line 943 of file tcp_timer.c.

References tcpcb::t_timers, tcp_timer::tt_2msl, TT_2MSL, TT_2MSL_SUS, tcp_timer::tt_delack, TT_DELACK, TT_DELACK_SUS, tcp_timer::tt_flags, tcp_timer::tt_keep, TT_KEEP, TT_KEEP_SUS, tcp_timer::tt_persist, TT_PERSIST, TT_PERSIST_SUS, tcp_timer::tt_rexmt, TT_REXMT, and TT_REXMT_SUS.

Referenced by bbr_stop_all_timers(), and rack_stop_all_timers().

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tcp_timers_unsuspend()

void tcp_timers_unsuspend	(	struct tcpcb *	tp,
		uint32_t	timer_type
	)

Definition at line 977 of file tcp_timer.c.

References inpcb::inp_socket, SEQ_GT, tcpcb::snd_max, tcpcb::snd_una, tcpcb::snd_wnd, tcpcb::t_flags, tcpcb::t_inpcb, tcpcb::t_rxtcur, tcpcb::t_rxtshift, tcpcb::t_state, tcpcb::t_timers, tcp_delacktime, tcp_fast_finwait2_recycle, tcp_finwait2_timeout, tcp_setpersist(), tcp_timer_activate(), tcp_timer_active(), TCPS_FIN_WAIT_2, TCPS_HAVEESTABLISHED, TF_DELACK, TP_KEEPIDLE, TP_KEEPINIT, TP_MAXIDLE, TT_2MSL, TT_2MSL_SUS, TT_DELACK, TT_DELACK_SUS, tcp_timer::tt_flags, TT_KEEP, TT_KEEP_SUS, TT_PERSIST, TT_PERSIST_SUS, TT_REXMT, and TT_REXMT_SUS.

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VNET_DEFINE() [1/3]

VNET_DEFINE	(	int	,
		tcp_always_keepalive
	)

VNET_DEFINE() [2/3]

VNET_DEFINE	(	int	,
		tcp_msl
	)

VNET_DEFINE() [3/3]

VNET_DEFINE	(	int	,
		tcp_pmtud_blackhole_detect
	)

Variable Documentation

per_cpu_timers

int per_cpu_timers = 0

static

Definition at line 197 of file tcp_timer.c.

Referenced by inp_to_cpuid().

tcp_backoff

int tcp_backoff[TCP_MAXRXTSHIFT+1]

Initial value:

=
    { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 512, 512, 512 }

Definition at line 254 of file tcp_timer.c.

Referenced by bbr_get_persists_timer_val(), bbr_timeout_rxt(), bbr_timer_start(), rack_get_persists_timer_val(), rack_timeout_rxt(), syncache_timeout(), tcp_setpersist(), and tcp_timer_rexmt().

tcp_delacktime

int tcp_delacktime

Definition at line 114 of file tcp_timer.c.

Referenced by cc_ecnpkt_handler_flags(), rack_start_hpts_timer(), tcp_do_segment(), tcp_init(), and tcp_timers_unsuspend().

tcp_fast_finwait2_recycle

int tcp_fast_finwait2_recycle = 0

Definition at line 149 of file tcp_timer.c.

Referenced by bbr_do_fin_wait_1(), bbr_do_syn_recv(), bbr_do_syn_sent(), rack_do_compressed_ack_processing(), rack_do_fin_wait_1(), rack_do_syn_recv(), rack_do_syn_sent(), tcp_do_segment(), tcp_timer_2msl(), tcp_timers_unsuspend(), and tcp_usrclosed().

tcp_finwait2_timeout

int tcp_finwait2_timeout

Definition at line 154 of file tcp_timer.c.

Referenced by bbr_do_fin_wait_1(), bbr_do_syn_recv(), bbr_do_syn_sent(), rack_do_compressed_ack_processing(), rack_do_fin_wait_1(), rack_do_syn_recv(), rack_do_syn_sent(), tcp_do_segment(), tcp_init(), tcp_timers_unsuspend(), and tcp_usrclosed().

tcp_keepcnt

int tcp_keepcnt = TCPTV_KEEPCNT

Definition at line 160 of file tcp_timer.c.

tcp_keepidle

int tcp_keepidle

Definition at line 102 of file tcp_timer.c.

Referenced by tcp_init().

tcp_keepinit

int tcp_keepinit

Definition at line 96 of file tcp_timer.c.

Referenced by tcp_init().

tcp_keepintvl

int tcp_keepintvl

Definition at line 108 of file tcp_timer.c.

Referenced by tcp_init().

tcp_maxpersistidle

int tcp_maxpersistidle

Definition at line 165 of file tcp_timer.c.

Referenced by bbr_timeout_persist(), rack_timeout_persist(), tcp_init(), and tcp_timer_persist().

tcp_persmax

int tcp_persmax

Definition at line 90 of file tcp_timer.c.

Referenced by tcp_init(), and tcp_setpersist().

tcp_persmin

int tcp_persmin

Definition at line 84 of file tcp_timer.c.

Referenced by tcp_init(), and tcp_setpersist().

tcp_rexmit_drop_options

int tcp_rexmit_drop_options = 0

Definition at line 167 of file tcp_timer.c.

Referenced by bbr_timeout_rxt(), rack_timeout_rxt(), and tcp_timer_rexmt().

tcp_rexmit_initial

int tcp_rexmit_initial

Definition at line 126 of file tcp_timer.c.

Referenced by syncache_timeout(), tcp_init(), tcp_newtcpcb(), and tcp_timer_rexmt().

tcp_rexmit_min

int tcp_rexmit_min

Definition at line 132 of file tcp_timer.c.

Referenced by syncache_timeout(), tcp_init(), and tcp_newtcpcb().

tcp_rexmit_slop

int tcp_rexmit_slop

Definition at line 138 of file tcp_timer.c.

Referenced by rack_convert_rtts(), rack_init(), rack_log_rtt_sample(), and tcp_init().

tcp_totbackoff

int tcp_totbackoff = 2559

Definition at line 257 of file tcp_timer.c.

Referenced by bbr_timeout_persist(), rack_timeout_persist(), and tcp_timer_persist().