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Data Structures
struct	cc_var

union	cc_var::ccv_container

struct	cc_algo

Macros
#define	V_default_cc_ptr VNET(default_cc_ptr)

#define	V_cc_do_abe VNET(cc_do_abe)

#define	V_cc_abe_frlossreduce VNET(cc_abe_frlossreduce)

#define	CCF_ABC_SENTAWND 0x0001 /* ABC counted cwnd worth of bytes? */

#define	CCF_CWND_LIMITED 0x0002 /* Are we currently cwnd limited? */

#define	CCF_USE_LOCAL_ABC 0x0004 /* Dont use the system l_abc val */

#define	CCF_ACKNOW 0x0008 /* Will this ack be sent now? */

#define	CCF_IPHDR_CE 0x0010 /* Does this packet set CE bit? */

#define	CCF_TCPHDR_CWR 0x0020 /* Does this packet set CWR bit? */

#define	CCF_MAX_CWND 0x0040 /* Have we reached maximum cwnd? */

#define	CCF_CHG_MAX_CWND 0x0080 /* Cubic max_cwnd changed, for K */

#define	CCF_USR_IWND 0x0100 /* User specified initial window */

#define	CCF_USR_IWND_INIT_NSEG 0x0200 /* Convert segs to bytes on conn init */

#define	CCF_HYSTART_ALLOWED 0x0400 /* If the CC supports it Hystart is allowed */

#define	CCF_HYSTART_CAN_SH_CWND 0x0800 /* Can hystart when going CSS -> CA slam the cwnd */

#define	CCF_HYSTART_CONS_SSTH 0x1000 /* Should hystart use the more conservative ssthresh */

#define	CC_ACK 0x0001 /* Regular in sequence ACK. */

#define	CC_DUPACK 0x0002 /* Duplicate ACK. */

#define	CC_PARTIALACK 0x0004 /* Not yet. */

#define	CC_SACK 0x0008 /* Not yet. */

#define	CC_ECN 0x00000001 /* ECN marked packet received. */

#define	CC_RTO 0x00000002 /* RTO fired. */

#define	CC_RTO_ERR 0x00000004 /* RTO fired in error. */

#define	CC_NDUPACK 0x00000008 /* Threshold of dupack's reached. */

#define	CC_SIGPRIVMASK 0xFF000000 /* Mask to check if sig is private. */

#define	CC_MODULE_BEING_REMOVED 0x01 /* The module is being removed */

#define	CC_ALGO(tp) ((tp)->cc_algo)

#define	CC_DATA(tp) ((tp)->ccv->cc_data)

#define	CC_DEFAULT_ALGO() V_default_cc_ptr

#define	CC_LIST_LOCK_INIT() rw_init(&cc_list_lock, "cc_list")

#define	CC_LIST_LOCK_DESTROY() rw_destroy(&cc_list_lock)

#define	CC_LIST_RLOCK() rw_rlock(&cc_list_lock)

#define	CC_LIST_RUNLOCK() rw_runlock(&cc_list_lock)

#define	CC_LIST_WLOCK() rw_wlock(&cc_list_lock)

#define	CC_LIST_WUNLOCK() rw_wunlock(&cc_list_lock)

#define	CC_LIST_LOCK_ASSERT() rw_assert(&cc_list_lock, RA_LOCKED)

#define	CC_ALGOOPT_LIMIT 2048

Functions
	MALLOC_DECLARE (M_CC_MEM)

	STAILQ_HEAD (cc_head, cc_algo) cc_list

	VNET_DECLARE (struct cc_algo *, default_cc_ptr)

	VNET_DECLARE (int, cc_do_abe)

	VNET_DECLARE (int, cc_abe_frlossreduce)

	SYSCTL_DECL (_net_inet_tcp_cc)

int	cc_register_algo (struct cc_algo *add_cc)

int	cc_deregister_algo (struct cc_algo *remove_cc)

void	newreno_cc_post_recovery (struct cc_var *)

void	newreno_cc_after_idle (struct cc_var *)

void	newreno_cc_cong_signal (struct cc_var *, uint32_t)

void	newreno_cc_ack_received (struct cc_var *, uint16_t)

void	cc_refer (struct cc_algo *algo)

void	cc_release (struct cc_algo *algo)

void	cc_attach (struct tcpcb , struct cc_algo )

void	cc_detach (struct tcpcb *)

Variables
const int	tcprexmtthresh

uint32_t	hystart_lowcwnd

uint32_t	hystart_minrtt_thresh

uint32_t	hystart_maxrtt_thresh

uint32_t	hystart_n_rttsamples

uint32_t	hystart_css_growth_div

uint32_t	hystart_css_rounds

uint32_t	hystart_bblogs

struct rwlock	cc_list_lock

Macro Definition Documentation

◆ CC_ACK

#define CC_ACK 0x0001 /* Regular in sequence ACK. */

Definition at line 123 of file cc.h.

◆ CC_ALGO

#define CC_ALGO ( tp ) ((tp)->cc_algo)

Definition at line 210 of file cc.h.

◆ CC_ALGOOPT_LIMIT

#define CC_ALGOOPT_LIMIT 2048

Definition at line 227 of file cc.h.

◆ CC_DATA

#define CC_DATA ( tp ) ((tp)->ccv->cc_data)

Definition at line 213 of file cc.h.

◆ CC_DEFAULT_ALGO

#define CC_DEFAULT_ALGO ( ) V_default_cc_ptr

Definition at line 216 of file cc.h.

◆ CC_DUPACK

#define CC_DUPACK 0x0002 /* Duplicate ACK. */

Definition at line 124 of file cc.h.

◆ CC_ECN

#define CC_ECN 0x00000001 /* ECN marked packet received. */

Definition at line 134 of file cc.h.

◆ CC_LIST_LOCK_ASSERT

#define CC_LIST_LOCK_ASSERT ( ) rw_assert(&cc_list_lock, RA_LOCKED)

Definition at line 225 of file cc.h.

◆ CC_LIST_LOCK_DESTROY

#define CC_LIST_LOCK_DESTROY ( ) rw_destroy(&cc_list_lock)

Definition at line 220 of file cc.h.

◆ CC_LIST_LOCK_INIT

#define CC_LIST_LOCK_INIT ( ) rw_init(&cc_list_lock, "cc_list")

Definition at line 219 of file cc.h.

◆ CC_LIST_RLOCK

#define CC_LIST_RLOCK ( ) rw_rlock(&cc_list_lock)

Definition at line 221 of file cc.h.

◆ CC_LIST_RUNLOCK

#define CC_LIST_RUNLOCK ( ) rw_runlock(&cc_list_lock)

Definition at line 222 of file cc.h.

◆ CC_LIST_WLOCK

#define CC_LIST_WLOCK ( ) rw_wlock(&cc_list_lock)

Definition at line 223 of file cc.h.

◆ CC_LIST_WUNLOCK

#define CC_LIST_WUNLOCK ( ) rw_wunlock(&cc_list_lock)

Definition at line 224 of file cc.h.

◆ CC_MODULE_BEING_REMOVED

#define CC_MODULE_BEING_REMOVED 0x01 /* The module is being removed */

Definition at line 207 of file cc.h.

◆ CC_NDUPACK

#define CC_NDUPACK 0x00000008 /* Threshold of dupack's reached. */

Definition at line 137 of file cc.h.

◆ CC_PARTIALACK

#define CC_PARTIALACK 0x0004 /* Not yet. */

Definition at line 125 of file cc.h.

◆ CC_RTO

#define CC_RTO 0x00000002 /* RTO fired. */

Definition at line 135 of file cc.h.

◆ CC_RTO_ERR

#define CC_RTO_ERR 0x00000004 /* RTO fired in error. */

Definition at line 136 of file cc.h.

◆ CC_SACK

#define CC_SACK 0x0008 /* Not yet. */

Definition at line 126 of file cc.h.

◆ CC_SIGPRIVMASK

#define CC_SIGPRIVMASK 0xFF000000 /* Mask to check if sig is private. */

Definition at line 139 of file cc.h.

◆ CCF_ABC_SENTAWND

#define CCF_ABC_SENTAWND 0x0001 /* ABC counted cwnd worth of bytes? */

Definition at line 108 of file cc.h.

◆ CCF_ACKNOW

#define CCF_ACKNOW 0x0008 /* Will this ack be sent now? */

Definition at line 111 of file cc.h.

◆ CCF_CHG_MAX_CWND

#define CCF_CHG_MAX_CWND 0x0080 /* Cubic max_cwnd changed, for K */

Definition at line 115 of file cc.h.

◆ CCF_CWND_LIMITED

#define CCF_CWND_LIMITED 0x0002 /* Are we currently cwnd limited? */

Definition at line 109 of file cc.h.

◆ CCF_HYSTART_ALLOWED

#define CCF_HYSTART_ALLOWED 0x0400 /* If the CC supports it Hystart is allowed */

Definition at line 118 of file cc.h.

◆ CCF_HYSTART_CAN_SH_CWND

#define CCF_HYSTART_CAN_SH_CWND 0x0800 /* Can hystart when going CSS -> CA slam the cwnd */

Definition at line 119 of file cc.h.

◆ CCF_HYSTART_CONS_SSTH

#define CCF_HYSTART_CONS_SSTH 0x1000 /* Should hystart use the more conservative ssthresh */

Definition at line 120 of file cc.h.

◆ CCF_IPHDR_CE

#define CCF_IPHDR_CE 0x0010 /* Does this packet set CE bit? */

Definition at line 112 of file cc.h.

◆ CCF_MAX_CWND

#define CCF_MAX_CWND 0x0040 /* Have we reached maximum cwnd? */

Definition at line 114 of file cc.h.

◆ CCF_TCPHDR_CWR

#define CCF_TCPHDR_CWR 0x0020 /* Does this packet set CWR bit? */

Definition at line 113 of file cc.h.

◆ CCF_USE_LOCAL_ABC

#define CCF_USE_LOCAL_ABC 0x0004 /* Dont use the system l_abc val */

Definition at line 110 of file cc.h.

◆ CCF_USR_IWND

#define CCF_USR_IWND 0x0100 /* User specified initial window */

Definition at line 116 of file cc.h.

◆ CCF_USR_IWND_INIT_NSEG

#define CCF_USR_IWND_INIT_NSEG 0x0200 /* Convert segs to bytes on conn init */

Definition at line 117 of file cc.h.

◆ V_cc_abe_frlossreduce

#define V_cc_abe_frlossreduce VNET(cc_abe_frlossreduce)

Definition at line 70 of file cc.h.

◆ V_cc_do_abe

#define V_cc_do_abe VNET(cc_do_abe)

Definition at line 67 of file cc.h.

◆ V_default_cc_ptr

#define V_default_cc_ptr VNET(default_cc_ptr)

Definition at line 64 of file cc.h.

Function Documentation

◆ cc_attach()

void cc_attach	(	struct tcpcb *	tp,
		struct cc_algo *	algo
	)

Definition at line 126 of file cc.c.

References CC_ALGO, CC_LIST_RLOCK, CC_LIST_RUNLOCK, and cc_refer().

Referenced by tcp_newtcpcb(), and tcp_set_cc_mod().

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◆ cc_deregister_algo()

int cc_deregister_algo ( struct cc_algo * remove_cc )

Definition at line 284 of file cc.c.

References cc_check_default(), cc_list, CC_LIST_WLOCK, CC_LIST_WUNLOCK, CC_MODULE_BEING_REMOVED, cc_algo::cc_refcount, and cc_algo::flags.

Referenced by cc_modevent().

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◆ cc_detach()

void cc_detach ( struct tcpcb * tp )

Definition at line 138 of file cc.c.

References CC_ALGO, CC_LIST_RLOCK, CC_LIST_RUNLOCK, and cc_release().

Referenced by tcp_discardcb(), tcp_newtcpcb(), and tcp_set_cc_mod().

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◆ cc_refer()

void cc_refer ( struct cc_algo * algo )

Definition at line 111 of file cc.c.

References CC_LIST_LOCK_ASSERT, and cc_algo::cc_refcount.

Referenced by cc_attach(), and tcp_set_cc_mod().

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◆ cc_register_algo()

int cc_register_algo ( struct cc_algo * add_cc )

Definition at line 322 of file cc.c.

References CC_DEFAULT, cc_list, CC_LIST_WLOCK, CC_LIST_WUNLOCK, cc_algo::cc_refcount, cc_algo::name, and V_default_cc_ptr.

Referenced by cc_modevent().

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◆ cc_release()

void cc_release ( struct cc_algo * algo )

Definition at line 118 of file cc.c.

References CC_LIST_LOCK_ASSERT, and cc_algo::cc_refcount.

Referenced by cc_detach(), and tcp_set_cc_mod().

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◆ MALLOC_DECLARE()

MALLOC_DECLARE ( M_CC_MEM )

◆ newreno_cc_ack_received()

void newreno_cc_ack_received	(	struct cc_var *	ccv,
		uint16_t	type
	)

Definition at line 493 of file cc.c.

References cc_var::bytes_this_ack, CC_ACK, CCF_ABC_SENTAWND, CCF_CWND_LIMITED, CCF_USE_LOCAL_ABC, CCV, cc_var::flags, IN_RECOVERY, cc_var::labc, cc_var::nsegs, V_tcp_abc_l_var, and V_tcp_do_rfc3465.

Referenced by dctcp_ack_received(), hd_ack_received(), htcp_ack_received(), and vegas_ack_received().

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◆ newreno_cc_after_idle()

void newreno_cc_after_idle ( struct cc_var * ccv )

Definition at line 415 of file cc.c.

References CCV, cc_var::ccvc, cc_var::ccv_container::tcp, tcp_compute_initwnd(), and tcp_maxseg().

Referenced by cubic_after_idle(), dctcp_after_idle(), and newreno_after_idle().

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◆ newreno_cc_cong_signal()

void newreno_cc_cong_signal	(	struct cc_var *	ccv,
		uint32_t	type
	)

Definition at line 447 of file cc.c.

References CC_ECN, CC_NDUPACK, CC_RTO, CC_SIGPRIVMASK, CCV, cc_var::ccvc, ENTER_CONGRECOVERY, ENTER_RECOVERY, IN_CONGRECOVERY, IN_FASTRECOVERY, cc_var::ccv_container::tcp, tcp_fixed_maxseg(), and V_newreno_beta.

Referenced by cdg_cong_signal(), chd_cong_signal(), dctcp_cong_signal(), hd_ack_received(), and vegas_cong_signal().

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◆ newreno_cc_post_recovery()

void newreno_cc_post_recovery ( struct cc_var * ccv )

Definition at line 384 of file cc.c.

References CCV, cc_var::ccvc, cc_var::curack, IN_FASTRECOVERY, cc_var::ccv_container::tcp, tcp_compute_pipe(), and V_tcp_do_newsack.

Referenced by dctcp_post_recovery().

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◆ STAILQ_HEAD()

STAILQ_HEAD	(	cc_head	,
		cc_algo
	)

◆ SYSCTL_DECL()

SYSCTL_DECL ( _net_inet_tcp_cc )

◆ VNET_DECLARE() [1/3]

VNET_DECLARE	(	int	,
		cc_abe_frlossreduce
	)

◆ VNET_DECLARE() [2/3]

VNET_DECLARE	(	int	,
		cc_do_abe
	)

◆ VNET_DECLARE() [3/3]

VNET_DECLARE	(	struct cc_algo *	,
		default_cc_ptr
	)

Variable Documentation

◆ cc_list_lock

struct rwlock cc_list_lock

extern

Definition at line 103 of file cc.c.

◆ hystart_bblogs

uint32_t hystart_bblogs

extern

Definition at line 92 of file cc.c.

Referenced by cubic_log_hystart_event(), and newreno_log_hystart_event().

◆ hystart_css_growth_div

uint32_t hystart_css_growth_div

extern

Definition at line 90 of file cc.c.

Referenced by cubic_does_slow_start(), and newreno_ack_received().

◆ hystart_css_rounds

uint32_t hystart_css_rounds

extern

Definition at line 91 of file cc.c.

Referenced by cubic_newround(), and newreno_newround().

◆ hystart_lowcwnd

uint32_t hystart_lowcwnd

extern

◆ hystart_maxrtt_thresh

uint32_t hystart_maxrtt_thresh

extern

Definition at line 88 of file cc.c.

Referenced by cubic_does_slow_start(), and newreno_ack_received().

◆ hystart_minrtt_thresh

uint32_t hystart_minrtt_thresh

extern

Definition at line 87 of file cc.c.

Referenced by cubic_does_slow_start(), and newreno_ack_received().

◆ hystart_n_rttsamples

uint32_t hystart_n_rttsamples

extern

Definition at line 89 of file cc.c.

Referenced by cubic_does_slow_start(), cubic_rttsample(), newreno_ack_received(), and newreno_rttsample().

◆ tcprexmtthresh

const int tcprexmtthresh

extern

Definition at line 135 of file tcp_input.c.

Referenced by tcp_do_prr_ack(), and tcp_do_segment().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ CC_ACK

◆ CC_ALGO

◆ CC_ALGOOPT_LIMIT

◆ CC_DATA

◆ CC_DEFAULT_ALGO

◆ CC_DUPACK

◆ CC_ECN

◆ CC_LIST_LOCK_ASSERT

◆ CC_LIST_LOCK_DESTROY

◆ CC_LIST_LOCK_INIT

◆ CC_LIST_RLOCK

◆ CC_LIST_RUNLOCK

◆ CC_LIST_WLOCK

◆ CC_LIST_WUNLOCK

◆ CC_MODULE_BEING_REMOVED

◆ CC_NDUPACK

◆ CC_PARTIALACK

◆ CC_RTO

◆ CC_RTO_ERR

◆ CC_SACK

◆ CC_SIGPRIVMASK

◆ CCF_ABC_SENTAWND

◆ CCF_ACKNOW

◆ CCF_CHG_MAX_CWND

◆ CCF_CWND_LIMITED

◆ CCF_HYSTART_ALLOWED

◆ CCF_HYSTART_CAN_SH_CWND

◆ CCF_HYSTART_CONS_SSTH

◆ CCF_IPHDR_CE

◆ CCF_MAX_CWND

◆ CCF_TCPHDR_CWR

◆ CCF_USE_LOCAL_ABC

◆ CCF_USR_IWND

◆ CCF_USR_IWND_INIT_NSEG

◆ V_cc_abe_frlossreduce

◆ V_cc_do_abe

◆ V_default_cc_ptr

Function Documentation

◆ cc_attach()

◆ cc_deregister_algo()

◆ cc_detach()

◆ cc_refer()

◆ cc_register_algo()

◆ cc_release()

◆ MALLOC_DECLARE()

◆ newreno_cc_ack_received()

◆ newreno_cc_after_idle()

◆ newreno_cc_cong_signal()

◆ newreno_cc_post_recovery()

◆ STAILQ_HEAD()

◆ SYSCTL_DECL()

◆ VNET_DECLARE() [1/3]

◆ VNET_DECLARE() [2/3]

◆ VNET_DECLARE() [3/3]

Variable Documentation

◆ cc_list_lock

◆ hystart_bblogs

◆ hystart_css_growth_div

◆ hystart_css_rounds

◆ hystart_lowcwnd

◆ hystart_maxrtt_thresh

◆ hystart_minrtt_thresh

◆ hystart_n_rttsamples

◆ tcprexmtthresh