src/sys/netinet/tcp_timer.c, branch release/6.2.0

Merge a bunch of changes to TCP compressed TIME_WAIT state handling

2006-09-15T09:51:05+00:00

that was done by myself and ru@ in HEAD:

o Remove a code from in in_pcblookup_local() that can lead to
  million times looping in this function.
o Rewrite the storage of tcptw entries to simple TAILQ. The
  more complex double LIST is not needed anymore since T/TCP
  is removed.
o Add possibility to change net.inet.tcp.maxtcptw via sysctl
  and load time tunable. Do not modify maxtcptw if it was set
  explicitly, if maxsockets is modified.
o Add sysctl that allows to suppress creating time wait states
  for sockets, where both endpoints are local.

Approved by:	re (kensmith)

MFC: Fixes an edge case bug in timewait handling where ticks rolling over causing

2006-09-05T19:16:10+00:00

     the timewait expiry to be exactly 0 corrupts the timewait queues (and that entry).

Merge tcp_input.c:1.292, tcp_timer.c:1.77 from HEAD to RELENG_6:

2006-06-11T16:18:50+00:00

  Explicitly assert socket pointer is non-NULL in tcp_input() so as to
  provide better debugging information.

  Prefer explicit comparison to NULL for tcpcb pointers rather than
  treating them as booleans.

MFC: Make sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS) generally available instead

2006-03-01T21:08:53+00:00

of being private to tcp_timer.c.

Sponsored by:	TCP/IP Optimization Fundraise 2005
Approved by:	re (scottl)

Merge tcp_subr.c:1.229, tcp_syncache.c:1.75, tcp_timer.c:1.75 from HEAD

2005-08-20T13:34:13+00:00

to RELENG_6:

  Remove no-op spl's and most comment references to spls, as TCP locking
  is believed to be basically done (modulo any remaining bugs).

Approved by:	re (kensmith)

Replace t_force with a t_flag (TF_FORCEDATA).

2005-05-21T00:38:29+00:00

Submitted by:   Raja Mukerji.
Reviewed by:    Mohan, Silby, Andre Opperman.

/* -> /*- for license, minor formatting changes

2005-01-07T01:45:51+00:00

Remove the now unused tcp_canceltimers() function. tcpcb timers are

2004-12-23T01:25:59+00:00

now stopped as part of tcp_discardcb().

MFC after:	2 weeks

Remove an annotation of a minor race relating to the update of

2004-12-23T01:21:54+00:00

multiple MIB entries using sysctl in short order, which might
result in unexpected values for tcp_maxidle being generated by
tcp_slowtimo.  In practice, this will not happen, or at least,
doesn't require an explicit comment.

MFC after:	2 weeks

Assert the tcptw inpcb lock in tcp_timer_2msl_reset(), as fields in

2004-12-05T22:47:29+00:00

the tcptw undergo non-atomic read-modify-writes.

MFC after:	2 weeks