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0559b904bc
freebsd-dev/sys/netinet
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Oleg Bulyzhin 897c0f57d4 1) dummynet_io() declaration has changed. 
2) Alter packet flow inside dummynet: allow certain packets to bypass
dummynet scheduler. Benefits are:

- lower latency: if packet flow does not exceed pipe bandwidth, packets
  will not be (up to tick) delayed (due to dummynet's scheduler granularity).
- lower overhead: if packet avoids dummynet scheduler it shouldn't reenter ip
  stack later. Such packets can be fastforwarded.
- recursion (which can lead to kernel stack exhaution) eliminated. This fix
  long existed panic, which can be triggered this way:
  	kldload dummynet
	sysctl net.inet.ip.fw.one_pass=0
	ipfw pipe 1 config bw 0
	for i in `jot 30`; do ipfw add 1 pipe 1 icmp from any to any; done
	ping -c 1 localhost

3) Three new sysctl nodes are added:
net.inet.ip.dummynet.io_pkt -		packets passed to dummynet
net.inet.ip.dummynet.io_pkt_fast - 	packets avoided dummynet scheduler
net.inet.ip.dummynet.io_pkt_drop -	packets dropped by dummynet

P.S. Above comments are true only for layer 3 packets. Layer 2 packet flow
     is not changed yet.

MFC after:	3 month
2007-11-06 23:01:42 +00:00
..
libalias
accf_data.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
accf_http.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
icmp6.h
icmp_var.h
if_atm.c
if_atm.h
if_ether.c Move towards more explicit support for various network protocol stacks 2007-10-28 15:55:23 +00:00
if_ether.h
igmp_var.h
igmp.c Move towards more explicit support for various network protocol stacks 2007-10-28 15:55:23 +00:00
igmp.h
in_cksum.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
in_gif.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
in_gif.h
in_mcast.c
in_pcb.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
in_pcb.h
in_proto.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
in_rmx.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
in_systm.h
in_var.h
in.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
in.h
ip6.h
ip_carp.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_carp.h
ip_divert.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
ip_divert.h
ip_dummynet.c 1) dummynet_io() declaration has changed. 2007-11-06 23:01:42 +00:00
ip_dummynet.h 1) dummynet_io() declaration has changed. 2007-11-06 23:01:42 +00:00
ip_ecn.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_ecn.h
ip_encap.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_encap.h
ip_fastfwd.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_fw2.c Continue to move from generic network entry points in the TrustedBSD MAC 2007-10-28 17:12:48 +00:00
ip_fw_pfil.c 1) dummynet_io() declaration has changed. 2007-11-06 23:01:42 +00:00
ip_fw.h
ip_gre.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_gre.h
ip_icmp.c Continue to move from generic network entry points in the TrustedBSD MAC 2007-10-28 17:12:48 +00:00
ip_icmp.h
ip_id.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_input.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
ip_ipsec.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_ipsec.h
ip_mroute.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
ip_mroute.h
ip_options.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
ip_options.h
ip_output.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
ip_var.h
ip.h Remove IPTOS_CE and IPTOS_ECT constants. They were defined in RFC 2481 2007-10-19 12:46:15 +00:00
ipprotosw.h
pim_var.h
pim.h
raw_ip.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
sctp_asconf.c
sctp_asconf.h
sctp_auth.c
sctp_auth.h
sctp_bsd_addr.c Rename the kthread_xxx (e.g. kthread_create()) calls 2007-10-20 23:23:23 +00:00
sctp_bsd_addr.h
sctp_cc_functions.c
sctp_cc_functions.h
sctp_constants.h - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
sctp_crc32.c
sctp_crc32.h
sctp_header.h
sctp_indata.c - fix sctp_ifn initial refcount issue (prevents deletion) 2007-10-16 14:05:51 +00:00
sctp_indata.h
sctp_input.c - fix sctp_ifn initial refcount issue (prevents deletion) 2007-10-16 14:05:51 +00:00
sctp_input.h
sctp_lock_bsd.h
sctp_os_bsd.h
sctp_os.h
sctp_output.c - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
sctp_output.h
sctp_pcb.c - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
sctp_pcb.h - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
sctp_peeloff.c
sctp_peeloff.h
sctp_structs.h - fix sctp_ifn initial refcount issue (prevents deletion) 2007-10-16 14:05:51 +00:00
sctp_sysctl.c
sctp_sysctl.h
sctp_timer.c - fix sctp_ifn initial refcount issue (prevents deletion) 2007-10-16 14:05:51 +00:00
sctp_timer.h
sctp_uio.h
sctp_usrreq.c - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
sctp_var.h - fix sctp_ifn initial refcount issue (prevents deletion) 2007-10-16 14:05:51 +00:00
sctp.h
sctputil.c - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
sctputil.h - Change the Time Wait of vtags value to match the cookie-life 2007-10-30 14:09:24 +00:00
tcp_debug.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
tcp_debug.h
tcp_fsm.h
tcp_hostcache.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
tcp_input.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
tcp_output.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
tcp_reass.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
tcp_sack.c
tcp_seq.h
tcp_subr.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
tcp_syncache.c Normalize TCP syncache-related MAC Framework entry points to match most 2007-10-25 14:37:37 +00:00
tcp_syncache.h
tcp_timer.c Add FBSDID to all files in netinet so that people can more 2007-10-07 20:44:24 +00:00
tcp_timer.h
tcp_timewait.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
tcp_usrreq.c Pick the smallest possible TCP window scaling factor that will still allow 2007-10-19 08:53:14 +00:00
tcp_var.h
tcp.h
tcpip.h
udp_usrreq.c Merge first in a series of TrustedBSD MAC Framework KPI changes 2007-10-24 19:04:04 +00:00
udp_var.h
udp.h