Date: Mon, 29 Oct 2018 19:01:48 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r339867 - in stable/12: share/man/man4 sys/netinet Message-ID: <201810291901.w9TJ1mxT076814@repo.freebsd.org>
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Author: tuexen Date: Mon Oct 29 19:01:47 2018 New Revision: 339867 URL: https://svnweb.freebsd.org/changeset/base/339867 Log: MFC r339791: Add initial descriptions for SCTP related MIB variable. This work was mostly done by Marie-Helene Kvello-Aune. Approved by: re (gjb) Differential Revision: https://reviews.freebsd.org/D3583 Modified: stable/12/share/man/man4/sctp.4 stable/12/sys/netinet/sctp_sysctl.h Directory Properties: stable/12/ (props changed) Modified: stable/12/share/man/man4/sctp.4 ============================================================================== --- stable/12/share/man/man4/sctp.4 Mon Oct 29 17:55:26 2018 (r339866) +++ stable/12/share/man/man4/sctp.4 Mon Oct 29 19:01:47 2018 (r339867) @@ -26,7 +26,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 15, 2006 +.Dd October 10, 2018 .Dt SCTP 4 .Os .Sh NAME @@ -145,7 +145,7 @@ with no regard to the ordering of any other message. The FreeBSD implementation of .Tn SCTP also supports the following extensions: -.Bl -hang -width indent +.Bl -tag -width "sctp partial reliability" .It "sctp partial reliability" This extension allows one to have message be skipped and not delivered based on some user specified parameters. @@ -168,7 +168,7 @@ utilization. This extension allows a user on either side to reset the stream sequence numbers used by any or all streams. .El -.Pp +.Ss Socket Options .Tn SCTP supports a number of socket options which can be set with .Xr setsockopt 2 @@ -176,7 +176,7 @@ and tested with .Xr getsockopt 2 or .Xr sctp_opt_info 3 : -.Bl -tag -width ".Dv SCTP_SET_PEER_PRIMARY_ADDR" +.Bl -tag -indent .It Dv SCTP_NODELAY Under most circumstances, .Tn SCTP @@ -409,6 +409,191 @@ Note that the peer endpoint must also support the stream reset extension as well. .El +.Ss MIB Variables +The +.Tn SCTP +protocol implements a number of variables in the +.Va net.inet.sctp +branch of the +.Xr sysctl 3 +MIB. +.Bl -ohang +.It Sy Congestion Control +.Bl -tag -width indent +.It Va default_cc_module +Default congestion control module. +Default value is 0. +The minimum is 0, and the maximum is 3. +A value of 0 enables the default congestion control algorithm. +A value of 1 enables the High Speed congestion control algorithm. +A value of 2 enables the HTCP congestion control algorithm. +A value of 3 enables the data center congestion control (DCCC) algorithm. +.It Va initial_cwnd +Defines the initial congestion window size in MTUs. +.It Va cwnd_maxburst +Use congestion control instead of 'blind' logic to limit maximum burst when sending. +Default value is 1. May be set to 0 or 1. +.It Va ecn_enable +Enable Explicit Congestion Notification (ECN). +Default value is 1. May be set to 0 or 1. +.It Va rttvar_steady_step +Number of identical bandwidth measurements DCCC takes to try step down the congestion window. +Default value is 20. +The minimum is 0, and the maximum is 65535. +.It Va rttvar_eqret +Whether DCCC reduces the congestion window size when round-trip time and bandwidth remain unchanged. +Default value is 0. +May be set to 0 or 1. +.It Va rttvar_bw +Shift amount DCCC uses for bandwidth smoothing on round-trip-time calculation. +Default value is 4. +The minimum is 0, and the maximum is 32. +.It Va rttvar_rtt +Shift amount DCCC uses for round-trip-time smoothing on round-trip-time calculation. +Default value is 5. +The minimum is 0, and the maximum is 32. +.It Va use_dcccecn +Enable ECN when using DCCC. +Default value is 1. +May be set to 0 or 1. +.El +.It Sy Misc +.Bl -tag -width indent +.It Va getcred +Get the ucred of a SCTP connection. +.It Va assoclist +List of active SCTP associations. +.It Va stats +SCTP statistics (struct sctp_stat). +.It Va diag_info_code +Diagnostic information error cause code. +.It Va blackhole +Enable SCTP blackholing. +See +.Xr blackhole 4 +for more details. +.It Va buffer_splitting +Enable send/receive buffer splitting. +.It Va vtag_time_wait +Vtag wait time in seconds, 0 to disable. +.It Va nat_friendly_init +Enable sending of the NAT-friendly SCTP option on INITs. +.It Va enable_sack_immediately +Enable sending of the SACK-IMMEDIATELY bit. +.It Va udp_tunneling_port +Set the SCTP/UDP tunneling port. +.It Va mobility_fasthandoff +Enable SCTP fast handoff. +.It Va mobility_base +Enable SCTP base mobility +.It Va default_frag_interleave +Default fragment interleave level. +.It Va default_ss_module +Default stream scheduling module. +.It Va log_level +Ltrace/KTR trace logging level. +.It Va max_retran_chunk +Number of retransmissions of a DATA chunk before an association is aborted. +.It Va min_residual +Minimum residual data chunk in second part of split. +.It Va strict_data_order +Enforce strict data ordering, abort if control inside data. +.It Va abort_at_limit +Abort when one-to-one hits qlimit. +.It Va hb_max_burst +Confirmation heartbeat max burst. +.It Va do_sctp_drain +Flush chunks in receive queues with TSN higher than the cumulative TSN if the +system is low on mbufs. +.It Va max_chained_mbufs +Default max number of small mbufs on a chain. +.It Va abc_l_var +SCTP ABC max increase per SACK (L). +.It Va nat_friendly +SCTP NAT friendly operation. +.It Va cmt_use_dac +CMT DAC on/off flag. +.It Va cmt_on_off +CMT settings. +.It Va outgoing_streams +Default number of outgoing streams. +.It Va incoming_streams +Default number of incoming streams. +.It Va add_more_on_output +When space-wise is it worthwhile to try to add more to a socket send buffer. +.It Va path_pf_threshold +Default potentially failed threshold. +.It Va path_rtx_max +Default maximum of retransmissions per path. +.It Va assoc_rtx_max +Default maximum number of retransmissions per association. +.It Va init_rtx_max +Default maximum number of retransmissions for INIT chunks. +.It Va valid_cookie_life +Default cookie lifetime in seconds. +.It Va init_rto_max +Default maximum retransmission timeout during association setup in ms. +.It Va rto_initial +Default initial retransmission timeout in ms. +.It Va rto_min +Default minimum retransmission timeout in ms. +.It Va rto_max +Default maximum retransmission timeout in ms. +.It Va secret_lifetime +Default secret lifetime in seconds. +.It Va shutdown_guard_time +Shutdown guard timer in seconds (0 means 5 times RTO.Max). +.It Va pmtu_raise_time +Default PMTU raise timer in seconds. +.It Va heartbeat_interval +Default heartbeat interval in ms. +.It Va asoc_resource +Max number of cached resources in an association. +.It Va sys_resource +Max number of cached resources in the system. +.It Va sack_freq +Default SACK frequency. +.It Va delayed_sack_time +Default delayed SACK timer in ms. +.It Va chunkscale +Tunable for scaling of number of chunks and messages. +.It Va min_split_point +Minimum size when splitting a chunk. +.It Va pcbhashsize +Tunable for PCB hash table sizes. +.It Va tcbhashsize +Tunable for TCB hash table sizes. +.It Va maxchunks +Default max chunks on queue per association. +.It Va fr_maxburst +Default max burst for SCTP endpoints when fast retransmitting. +.It Va maxburst +Default max burst for SCTP endpoints. +.It Va peer_chkoh +Amount to debit peers rwnd per chunk sent. +.It Va strict_sacks +Enable SCTP Strict SACK checking. +.It Va pktdrop_enable +Enable SCTP PKTDROP. +.It Va nrsack_enable +Enable SCTP NR-SACK. +.It Va reconfig_enable +Enable SCTP RE-CONFIG. +.It Va asconf_enable +Enable SCTP ASCONF. +.It Va auth_enable +Enable SCTP AUTH. +.It Va pr_enable +Enable PR-SCTP. +.It Va auto_asconf +Enable SCTP Auto-ASCONF. +.It Va recvspace +Maximum incoming SCTP buffer size. +.It Va sendspace +Maximum outgoing SCTP buffer size. +.El +.El + .Sh SEE ALSO .Xr accept 2 , .Xr bind 2 , @@ -418,4 +603,5 @@ as well. .Xr sctp_connectx 3 , .Xr sctp_opt_info 3 , .Xr sctp_recvmsg 3 , -.Xr sctp_sendmsg 3 +.Xr sctp_sendmsg 3 , +.Xr blackhole 4 Modified: stable/12/sys/netinet/sctp_sysctl.h ============================================================================== --- stable/12/sys/netinet/sctp_sysctl.h Mon Oct 29 17:55:26 2018 (r339866) +++ stable/12/sys/netinet/sctp_sysctl.h Mon Oct 29 19:01:47 2018 (r339867) @@ -212,7 +212,7 @@ struct sctp_sysctl { #define SCTPCTL_MAXBURST_DEFAULT SCTP_DEF_MAX_BURST /* fr_maxburst: Default max burst for sctp endpoints when fast retransmitting */ -#define SCTPCTL_FRMAXBURST_DESC "Default fr max burst for sctp endpoints" +#define SCTPCTL_FRMAXBURST_DESC "Default max burst for SCTP endpoints when fast retransmitting" #define SCTPCTL_FRMAXBURST_MIN 0 #define SCTPCTL_FRMAXBURST_MAX 0xFFFFFFFF #define SCTPCTL_FRMAXBURST_DEFAULT SCTP_DEF_FRMAX_BURST @@ -243,7 +243,7 @@ struct sctp_sysctl { #define SCTPCTL_MIN_SPLIT_POINT_DEFAULT SCTP_DEFAULT_SPLIT_POINT_MIN /* chunkscale: Tunable for Scaling of number of chunks and messages */ -#define SCTPCTL_CHUNKSCALE_DESC "Tunable for Scaling of number of chunks and messages" +#define SCTPCTL_CHUNKSCALE_DESC "Tunable for scaling of number of chunks and messages" #define SCTPCTL_CHUNKSCALE_MIN 1 #define SCTPCTL_CHUNKSCALE_MAX 0xFFFFFFFF #define SCTPCTL_CHUNKSCALE_DEFAULT SCTP_CHUNKQUEUE_SCALE @@ -327,7 +327,7 @@ struct sctp_sysctl { #define SCTPCTL_VALID_COOKIE_LIFE_DEFAULT SCTP_DEFAULT_COOKIE_LIFE /* init_rtx_max: Default maximum number of retransmission for INIT chunks */ -#define SCTPCTL_INIT_RTX_MAX_DESC "Default maximum number of retransmission for INIT chunks" +#define SCTPCTL_INIT_RTX_MAX_DESC "Default maximum number of retransmissions for INIT chunks" #define SCTPCTL_INIT_RTX_MAX_MIN 0 #define SCTPCTL_INIT_RTX_MAX_MAX 0xFFFFFFFF #define SCTPCTL_INIT_RTX_MAX_DEFAULT SCTP_DEF_MAX_INIT @@ -380,8 +380,8 @@ struct sctp_sysctl { #define SCTPCTL_CMT_USE_DAC_MAX 1 #define SCTPCTL_CMT_USE_DAC_DEFAULT 0 -/* cwnd_maxburst: Use a CWND adjusting maxburst */ -#define SCTPCTL_CWND_MAXBURST_DESC "Use a CWND adjusting maxburst" +/* cwnd_maxburst: Use a CWND adjusting to implement maxburst */ +#define SCTPCTL_CWND_MAXBURST_DESC "Adjust congestion control window to limit maximum burst when sending" #define SCTPCTL_CWND_MAXBURST_MIN 0 #define SCTPCTL_CWND_MAXBURST_MAX 1 #define SCTPCTL_CWND_MAXBURST_DEFAULT 1 @@ -417,7 +417,7 @@ struct sctp_sysctl { #define SCTPCTL_HB_MAX_BURST_DEFAULT SCTP_DEF_HBMAX_BURST /* abort_at_limit: When one-2-one hits qlimit abort */ -#define SCTPCTL_ABORT_AT_LIMIT_DESC "When one-2-one hits qlimit abort" +#define SCTPCTL_ABORT_AT_LIMIT_DESC "Abort when one-to-one hits qlimit" #define SCTPCTL_ABORT_AT_LIMIT_MIN 0 #define SCTPCTL_ABORT_AT_LIMIT_MAX 1 #define SCTPCTL_ABORT_AT_LIMIT_DEFAULT 0 @@ -429,7 +429,7 @@ struct sctp_sysctl { #define SCTPCTL_MIN_RESIDUAL_DEFAULT 1452 /* max_retran_chunk: max chunk retransmissions */ -#define SCTPCTL_MAX_RETRAN_CHUNK_DESC "Maximum times an unlucky chunk can be retran'd before assoc abort" +#define SCTPCTL_MAX_RETRAN_CHUNK_DESC "Maximum times an unlucky chunk can be retransmitted before assoc abort" #define SCTPCTL_MAX_RETRAN_CHUNK_MIN 0 #define SCTPCTL_MAX_RETRAN_CHUNK_MAX 65535 #define SCTPCTL_MAX_RETRAN_CHUNK_DEFAULT 30 @@ -477,63 +477,63 @@ struct sctp_sysctl { #define SCTPCTL_UDP_TUNNELING_PORT_DEFAULT 0 /* Enable sending of the SACK-IMMEDIATELY bit */ -#define SCTPCTL_SACK_IMMEDIATELY_ENABLE_DESC "Enable sending of the SACK-IMMEDIATELY-bit." +#define SCTPCTL_SACK_IMMEDIATELY_ENABLE_DESC "Enable sending of the SACK-IMMEDIATELY-bit" #define SCTPCTL_SACK_IMMEDIATELY_ENABLE_MIN 0 #define SCTPCTL_SACK_IMMEDIATELY_ENABLE_MAX 1 #define SCTPCTL_SACK_IMMEDIATELY_ENABLE_DEFAULT SCTPCTL_SACK_IMMEDIATELY_ENABLE_MAX /* Enable sending of the NAT-FRIENDLY message */ -#define SCTPCTL_NAT_FRIENDLY_INITS_DESC "Enable sending of the nat-friendly SCTP option on INITs." +#define SCTPCTL_NAT_FRIENDLY_INITS_DESC "Enable sending of the nat-friendly SCTP option on INITs" #define SCTPCTL_NAT_FRIENDLY_INITS_MIN 0 #define SCTPCTL_NAT_FRIENDLY_INITS_MAX 1 #define SCTPCTL_NAT_FRIENDLY_INITS_DEFAULT SCTPCTL_NAT_FRIENDLY_INITS_MIN /* Vtag time wait in seconds */ -#define SCTPCTL_TIME_WAIT_DESC "Vtag time wait time in seconds, 0 disables it." +#define SCTPCTL_TIME_WAIT_DESC "Vtag time wait time in seconds, 0 disables it" #define SCTPCTL_TIME_WAIT_MIN 0 #define SCTPCTL_TIME_WAIT_MAX 0xffffffff #define SCTPCTL_TIME_WAIT_DEFAULT SCTP_TIME_WAIT /* Enable Send/Receive buffer splitting */ -#define SCTPCTL_BUFFER_SPLITTING_DESC "Enable send/receive buffer splitting." +#define SCTPCTL_BUFFER_SPLITTING_DESC "Enable send/receive buffer splitting" #define SCTPCTL_BUFFER_SPLITTING_MIN 0 #define SCTPCTL_BUFFER_SPLITTING_MAX 0x3 #define SCTPCTL_BUFFER_SPLITTING_DEFAULT SCTPCTL_BUFFER_SPLITTING_MIN -/* Initial congestion window in MTU */ -#define SCTPCTL_INITIAL_CWND_DESC "Initial congestion window in MTUs" +/* Initial congestion window in MTUs */ +#define SCTPCTL_INITIAL_CWND_DESC "Defines the initial congestion window size in MTUs" #define SCTPCTL_INITIAL_CWND_MIN 0 #define SCTPCTL_INITIAL_CWND_MAX 0xffffffff #define SCTPCTL_INITIAL_CWND_DEFAULT 3 /* rttvar smooth avg for bw calc */ -#define SCTPCTL_RTTVAR_BW_DESC "Shift amount for bw smoothing on rtt calc" +#define SCTPCTL_RTTVAR_BW_DESC "Shift amount DCCC uses for bw smoothing on rtt calc" #define SCTPCTL_RTTVAR_BW_MIN 0 #define SCTPCTL_RTTVAR_BW_MAX 32 #define SCTPCTL_RTTVAR_BW_DEFAULT 4 /* rttvar smooth avg for bw calc */ -#define SCTPCTL_RTTVAR_RTT_DESC "Shift amount for rtt smoothing on rtt calc" +#define SCTPCTL_RTTVAR_RTT_DESC "Shift amount DCCC uses for rtt smoothing on rtt calc" #define SCTPCTL_RTTVAR_RTT_MIN 0 #define SCTPCTL_RTTVAR_RTT_MAX 32 #define SCTPCTL_RTTVAR_RTT_DEFAULT 5 -#define SCTPCTL_RTTVAR_EQRET_DESC "What to return when rtt and bw are unchanged" +#define SCTPCTL_RTTVAR_EQRET_DESC "Whether DCCC increases cwnd when the rtt and bw are unchanged" #define SCTPCTL_RTTVAR_EQRET_MIN 0 #define SCTPCTL_RTTVAR_EQRET_MAX 1 #define SCTPCTL_RTTVAR_EQRET_DEFAULT 0 -#define SCTPCTL_RTTVAR_STEADYS_DESC "How many the sames it takes to try step down of cwnd" +#define SCTPCTL_RTTVAR_STEADYS_DESC "Number of identical bw measurements DCCC takes to try step down of cwnd" #define SCTPCTL_RTTVAR_STEADYS_MIN 0 #define SCTPCTL_RTTVAR_STEADYS_MAX 0xFFFF #define SCTPCTL_RTTVAR_STEADYS_DEFAULT 20 /* 0 means disable feature */ -#define SCTPCTL_RTTVAR_DCCCECN_DESC "Enable for RTCC CC datacenter ECN" +#define SCTPCTL_RTTVAR_DCCCECN_DESC "Enable ECN for DCCC." #define SCTPCTL_RTTVAR_DCCCECN_MIN 0 #define SCTPCTL_RTTVAR_DCCCECN_MAX 1 #define SCTPCTL_RTTVAR_DCCCECN_DEFAULT 1 /* 0 means disable feature */ -#define SCTPCTL_BLACKHOLE_DESC "Enable SCTP blackholing. See blackhole(4) for more details." +#define SCTPCTL_BLACKHOLE_DESC "Enable SCTP blackholing, see blackhole(4) for more details" #define SCTPCTL_BLACKHOLE_MIN 0 #define SCTPCTL_BLACKHOLE_MAX 2 #define SCTPCTL_BLACKHOLE_DEFAULT SCTPCTL_BLACKHOLE_MIN @@ -553,7 +553,7 @@ struct sctp_sysctl { #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) -#define SCTPCTL_OUTPUT_UNLOCKED_DESC "Unlock socket when sending packets down to IP." +#define SCTPCTL_OUTPUT_UNLOCKED_DESC "Unlock socket when sending packets down to IP" #define SCTPCTL_OUTPUT_UNLOCKED_MIN 0 #define SCTPCTL_OUTPUT_UNLOCKED_MAX 1 #define SCTPCTL_OUTPUT_UNLOCKED_DEFAULT SCTPCTL_OUTPUT_UNLOCKED_MIN
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