- struct timeval time is gone
time.tv_sec -> time_second
- struct timeval mono_time is gone
mono_time.tv_sec -> time_uptime
- access to time via
{get,}{micro,nano,bin}time()
get* versions are fast but less precise
- support NTP nanokernel implementation (NTP API 4)
- further reading:
Timecounter Paper: http://phk.freebsd.dk/pubs/timecounter.pdf
NTP Nanokernel: http://www.eecis.udel.edu/~mills/ntp/html/kern.html
- Replace references to linesw[0] with a ttyldisc_default() function
that returns the default ("termios") line discipline.
- The linesw[] array is gone, replaced by a linked list.
- ttyldisc_add() and ttyldisc_remove() have been replaced by
ttyldisc_attach() and ttyldisc_detach().
- Things that provide line disciplines are now responsible for
registering those disciplines with the system. The linesw
structures are no longer declared in tty_conf.c
- Line disciplines are now refcounted; a lookup causes a reference to
be held. ttyldisc_release() releases the reference. Attempts to
detach an in-use line discipline result in EBUSY.
- Fix function signature lossage in if_sl.c, if_strip.c, and tty_tb.c
that was masked by the old tty_conf.c
- tty_init() is no longer necessary; delete it and its call from main().
follows BSD/OS practice and ucd-snmp code (FreeBSD does it for specific
interfaces only).
was: if_lastchange get updated on every packet transmission/receipt.
now: if_lastchange get updated when IFF_UP is changed.
Once we have a complete frame, schedule a STRIP software interrupt,
and manipulate ipintrq from there. This will allow us to clean up
the use of splimp() in this file later.
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.
The old timeout()/untimeout() API has been removed from the kernel.
* Fix radio error-message parsing bug: old comparison against error
prefix string off by the size of the Starmode link-level protocol field.
* Fix radio reset finite state machine, given that parsing works properly.
* Add debugging messages about reset FSM if IFF_DEBUG is set.
* Remove #ifdefs notdef around back the check that discards newlines at
the beginning of a frame. Every error message from the radio has a newline,
as the radio send error messages terminated by \r\n, not just \r like data
frames. Not dropping the \n garbles the following data frame.
* Remove unused low-level debugging routines.
* Reformat the low-level bytestuff/RLL code to match the canonical source.
* Reduce MTU to 1100 bytes; 1200 bytes can overflow the radio buffers if the
bytestuff/RLL does poorly.
* Fix radio-probe string to _not_ include a frame delimiter (\r): sending
a \r to the radio tickles a bug in the firmware, causing the radio to
smash the next frame sent after the "**\r" probe string.
* Add calls to the tty t_oproc routine to make sure the probe and reset
strings get sent to the modem promptly, rather than waiting for the next
packet.
* Add PPP-style calls to the tty start-output function; seems to
reduce latency marginally.
still to do:
* Flush output queue if resetting, since the radio is going to drop
frames on the floor anyway if it needs resetting.
* Reduce tty start-output calls.
kardel