control over the result of buildworld and installworld; this especially
helps packaging systems such as nanobsd
Reviewed by: various (posted to arch)
MFC after: 1 month
This allows the location of the configuration data to be relocated
within the filesystem containing it. A nullfs mount is used in order
to achieve this.
Obtained from: XORP, Inc.
As discussed with Robert Watson on the src-committers list, it is safer
to keep at least some pty(4) entries in /etc/ttys, for applications that
roll their own PTY allocation routine and only search for BSD-style
PTY's.
This means we've now just toggled the amount of entries for pts(4) and
pty(4).
Requested by: rwatson
Because we now use pts(4)-style PTY's exclusively, there is no use for
these entries in /etc/ttys. Right now the pts(4) entries only go from 0
to 255. Because we're going to touch these files anyway, increase the
number to 511.
Discussed with: philip (ex-mentor)
The last half year I've been working on a replacement TTY layer for the
FreeBSD kernel. The new TTY layer was designed to improve the following:
- Improved driver model:
The old TTY layer has a driver model that is not abstract enough to
make it friendly to use. A good example is the output path, where the
device drivers directly access the output buffers. This means that an
in-kernel PPP implementation must always convert network buffers into
TTY buffers.
If a PPP implementation would be built on top of the new TTY layer
(still needs a hooks layer, though), it would allow the PPP
implementation to directly hand the data to the TTY driver.
- Improved hotplugging:
With the old TTY layer, it isn't entirely safe to destroy TTY's from
the system. This implementation has a two-step destructing design,
where the driver first abandons the TTY. After all threads have left
the TTY, the TTY layer calls a routine in the driver, which can be
used to free resources (unit numbers, etc).
The pts(4) driver also implements this feature, which means
posix_openpt() will now return PTY's that are created on the fly.
- Improved performance:
One of the major improvements is the per-TTY mutex, which is expected
to improve scalability when compared to the old Giant locking.
Another change is the unbuffered copying to userspace, which is both
used on TTY device nodes and PTY masters.
Upgrading should be quite straightforward. Unlike previous versions,
existing kernel configuration files do not need to be changed, except
when they reference device drivers that are listed in UPDATING.
Obtained from: //depot/projects/mpsafetty/...
Approved by: philip (ex-mentor)
Discussed: on the lists, at BSDCan, at the DevSummit
Sponsored by: Snow B.V., the Netherlands
dcons(4) fixed by: kan
"workstation" firewall types to be set from rc.conf so that rc.firewall
no longer needs local patching to be usable for those types. For now
I've set the variables in /etc/defaults/rc.conf to the previous defaults
in /etc/rc.firewall.
PR: bin/65258
Submitted by: Valentin Nechayev netch of netch.kiev.ua
Silence from: net
MFC after: 2 weeks
and "mask" variables into a single "net" variable that contains a full
network address (including either a netmask or prefix length at the user's
choice). Update the example settings to match.
MFC after: 2 weeks
- don't run it if net.inet.ip.fw.verbose = 0 as it is pointless
- handle rules without logging limit correctly [1]
(those rules show up without logamount in "ipfw -a list")
PR: conf/126060 [1]
MFC after: 1 month
to allow them to do a "clean" shutdown.
I purposely avoided making changes to network-related stuff since the
system shutting down is pretty conclusive, and there may be complicated
dependencies on the network that I would rather not try to unravel.
I also skipped kerberos-related stuff for the reasons above, and
because I have no way to test it.
The uart(4) driver has the advantage of supporting a wider variety of
hardware on a greater amount of platforms. This driver has already been
the standard on platforms such as ia64, powerpc and sparc64.
I've decided not to change anything on pc98. I'd rather let people from
the pc98 team look at this.
Approved by: philip (mentor), marcel
Give a better example if a user absolutely must use this option, and
suggest they pick something from the ephemeral port range rather than
port 53. This means that the example will not work if it is merely
uncommented, but this will hopefully encourage users to read the comment.
