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From: burgess@hrd769.brooks.af.mil (Dave Burgess)
Newsgroups: comp.os.386bsd.announce,comp.answers,news.answers
Subject: [comp.os.386bsd] BNR/2 derived BSD for PCs FAQ (Part 5 of 10)
Followup-To: comp.os.386bsd.misc
Date: 13 Dec 1993 06:00:45 -0000
Organization: Armstrong Laboratory, Brooks AFB, TX
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Approved: news-answers-request@MIT.Edu
Distribution: world
Expires: 12/31/93
Message-ID: <386bsd-faq-5-755762418@hrd769.brooks.af.mil>
References: <386bsd-faq-1-755762418@hrd769.brooks.af.mil>
Reply-To: 386bsd-faq@hrd769.brooks.af.mil (386bsd FAQ Maintainer)
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Posted-By: auto-faq 2.4
Archive-name: 386bsd-faq/part5
Section 4. (Kernel Additions)
Thanks go to Marc Wandschneider (storm@cs.mcgill.ca) for putting this
section of the FAQ together..
4.0 Introduction
If you have written some addition to the kernel, or know of
one that feel should be mentioned, send mail to Dave Burgess
(burgess@hrd769.brooks.af.mil) with all the relevant information,
and it will be added for the next release.
4.1 Common Kernel-related problems
4.1.1 Where are the commands "rpcinfo" and "rpcgen"?
Chris Flatters (cflatter@nrao.edu) informs us in the following
posting excerpt where we can find them:
--------------------------------------------------------------------
The sources for the Sun OS 4.0 RPC are on titan.rice.edu (I don't
have the inet number handy) in directory sun-sources. You will have
to pick up all the shell archives and unpack them to get at rpcgen.
--------------------------------------------------------------------
These sources are also included in NetBSD and FreeBSD as part of the
normal installation.
4.1.2 Where can I get a working "netstat"?
netstat was released as a binary patch and source patch
in the patchkit. Netstat will be a part of the FreeBSD
distribution currently under construction, and is already
part of NetBSD.
4.1.3 How can I fix NFS to work with my NE2000 board?
Ken Raeburn (raeburn@cambridge.cygnus.com) has both identified the
problem and provided us with a work around:
--------------------------------------------------------------------
I reported previously that I was seeing problems reading files over
NFS using the ne2000 driver; timeouts would eventually be reported, no
data would be read. Listing files and directories (small ones
anyways) were not a problem.
After playing with etherfind and kernel printfs, I've come to this
conclusion: Fragmented 8K UDP packets from the NFS server are not
reaching the UDP layer in 386bsd. The Sun is sending them (according
to another Sun spying on the network), but the UDP input routine is
never called. I don't know if the bug here is on the 386bsd or Sun
side, and won't have time to look into it in the next couple of days.
In the meantime, mounting NFS file systems with "rsize=1024" does get
rid of this problem.
(It does nothing about TCP being slow, though.)
Ken
--------------------------------------------------------------------
Hopefully, the real solution (a UDP fix) will be forthcoming so
that the slow TCP problem is fixed as well.
See also: Section 2.6.3.3c "I am getting lousy performance
out of my network card. What are some of the other
possibilities?"
4.1.4 How can I get "ps" and "w" to work?
The patch-kit contains a fix for /src/lib/libutil/kvm.c, which,
last we heard, was due to the work of Jim Paradis
(paradis@sousa.ltn.dec.com). New versions of the kernel should
have this problem fixed.
In order for users to be able to use certain flags with ps and
the w/uptime commands, the kernel must have permissions 755.
Also, in order to save space on the distribution, the kernel is
'stripped' of all its labels. Programs that rely on those labels
will not work. There are several in this category, including ps,
w, and uptime. Either ftp an un-stripped kernel, or recompile.
4.1.5 Where are re_comp and re_exec?
These two functions are currently not in libc.a. However, there
are two related functions that seem to work exactly the same in
all cases we've heard of---These are regcomp() and regexec().
Thus, a pretty ugly fix for the problem would be to always compile
as follows:
$(CC) -Dre_comp=regcomp -Dre_exec=regexec ....
There is a slightly nicer fix available for this, listed in 4.2
4.1.6 Where are stty() and gtty()?
These functions are missing from libc.a. To fix, add the following
#defines to your program:
#define stty(f, m) ioctl((f), TIOCSETP, (m))
#define gtty(f, m) ioctl((f), TIOCGETP, (m))
A more elegant solution is to apply the patchkit. These routines
are included in there.
4.1.7 The system hangs with the HD light on after intense disk usage.
Brett Lymn (blymn@mulga.awadi.com.AU) Provides us with a
description of the problem and the steps that he had to take
to fix it:
It seems that, on some disk subsystems, the controller and the
hard disk get out of synchronization when they are being used
intensively. The result of this is that the disk completes a
command but the controller still believes the disk not to have
completed the command, so the controller status register
indicates the disk is busy when it is not really. The standard
wd drivers are too trusting of the hardware and expect it to do
the right thing all the time. There are a few while loops in
the wd drivers that loop on a status change from the disk
controller, however; if the problem I have described takes place
then the wd driver will be stuck looping waiting for the disk to
not be busy - which never happens, so you lock the machine because
this is a kernel level wait. To fix this problem I put a timeout
into the while loops so that after a specified time the wd driver
will give up waiting for the drive to become ready, reset the
controller and retry the command. In my experience the retry
always succeeds.
Ed.Note: The retry doesn't ALWAYS work, but it IS better than
just waiting for the drive to wake back up (which it never does).
Dan Yergeau (yergeau@gloworm.Stanford.EDU) provides us with more
insight into this problem. The README accompanying the original
sources used as a base for the NetBSD driver indicates that
> There's also another problem still bothering me: There's some
sort of timing/reentrancy error still lurking in here, that was
there in the original 0.1 wd driver as well. The symptom is that,
on *some* controllers, doing the initial wdopen() (which will
then call the readdisklabel() function) for two or more disks at
the same time (so that wdopen() gets called again while it's
already being executed), the controller gets hung. I'm still
looking for this, meanwhile I specify in my config file that I
have swap on all disks. This causes the kernel to wdopen() the
drives nicely in order -- and once it's been done for each disk,
the problem will, of course, not occur. Without the "swap on ...
and ... and ..." stuff, my wd1, wd2 and wd3 would be opened
simultaneously by "fsck -p" forks, which would nicely hang up
everything... I note a "sleep(10)" in fsck, but it obviously
doesn't do that.
So, changing the appropriate config line to
config "386bsd" root on wd0 swap on wd0 and wd1
^^^^^^^
may get around the problem. I don't run NetBSD, but I do use a
variation of the barsoom/NetBSD driver. This works for me.
Please let the NetBSD people know if it works for you.
(Note: the sleep(10) in fsck is misplaced. It does not keep fsck
from opening multiple disks simultaneously. A properly placed
sleep() should also work around the wdopen problem.)
#include <std.disclaimer>
4.1.8 How do you implement quotas on Net/2 derived BSD systems?
From: tinguely@plains.NoDak.edu (Mark Tinguely)
maybe you did not complete the setup, here is a step-by-step
instructions to get them to work:
1) make a kernel with "options quota" installed
2) edit /etc/fstab and include the kinds of quotas you want,
below I used "userquota", you could also add "groupquota".
/dev/wd0h /usr ufs rw,userquota 1 2
3) for each filesystem that is in /etc/fstab that uses quota,
create the file "quota.user" (and "quota.group if appropriate).
Above I have user quotas in the /usr filesystem, so I would:
# touch /usr/quota.user
4) scan filesystem for files ownership (and/or group ownership).
# quotacheck -a
5) now you can add individual quota limits, if you want to add
the same quotas to the many people, then make a template and
replicate the template. If they change for each user, then
edit seperately.
# edquota tinguely
(an editor is kicked up and says something like:
Quotas for user tinguely:
/usr: blocks in use: 11876, limits (soft = 0, hard = 0)
inodes in use: 891, limits (soft = 0, hard = 0)
a limit of 0 means "unlimited". Change these to the appropriate
number of blocks. A soft limit generates a warning, and can be
exceed for period of time (7 days?), after which time a soft limit
is treated like a hard limit. A hard limit denies new writes.
to replicate a template (for this example let us assume "tinguely"
is the template):
# edquota -p tinguely user1 user2 user3 ... userN
6) turn quotas on (usually done in the /etc/rc file, but turn it
on manually so you do not have to reboot right now:
# quotaon
that should take care of setting up quotas. You can look at the
status of use of files with repquota, the -a option lists all
filesystems with quotas.
4.2 Available kernel add-ons
4.2.1 The Patch-Kit
Perhaps the most famous of all additions to the kernel, the Patch-Kit,
currently coordinated by Rodney Grimes (rgrimes@agora.rain.com)
contains numerous bug fixes, Julian's SCSI drivers, as well as fixes
for other parts of the system.
The patch-kit, as well as all relevant information, is available on
agate.berkeley.edu (and mirrors) in unofficial/patch-kit, as well
as bsd.co.montana.edu in /pub/patch-kit. (archie will likely list
other sites as well)
It is highly recommended that all users with space for the source code
apply the patch-kits as many things that seem broken in 0.1 suddenly
start working with the patch-kits.
4.2.2 Shared Libraries
A basic and experimental implementation of shared libraries exists
for 386bsd. According to the author (Dr. Joerg Lohse,
lohse@tech7.informatik.uni-hamburg.de), features are as follows:
-No kernel extension is necessary
-Shared libraries use the approach used in SysV.
Others are also working on different implementations of shared
libraries.
This code can be obtained from agate.berkeley.edu in
~/unofficial/from-ref/sys.extras. The file is called ??????????.
Bill and Lynne have adopted a shared-library implementation based
on Dr. Lohse's original work. It will be included in Version 0.2
of 386bsd and should be included in NetBSD about the same time
(Yes, I am guessing here).
4.2.3 Sound Blaster Drivers
A driver for the Sound Blaster card has been written by Steve
Haehnichen (steveh@ucsd.edu) for BSD. Steve Gerakines has
provided us with the information necessary to get this driver
working under 386bsd.
Most features of the SB family of cards are supported save some
stereo portions of the SBPro cards.
The driver is available on agate.berkeley.edu in
unofficial/drivers/misc/soundblaster-1.4
4.2.4 Bus Mouse Drivers
Fred Cawthorne (fcawth@delphi.umd.edu) has written a busmouse
driver for 386bsd. It supposedly works with X386, and the
last version we have checked out was labelled as a BETA
release.
This can be found on agate in unofficial/drivers/misc/busmouse
4.2.5 PPP Support
A package to add PPP support to 386bsd can be found on agate
in unofficial/drivers/net. It is included in NetBSD and FreeBSD.
4.2.6 re_comp and re_exec library functions
As mentioned in section 4.1, re_comp and related functions, such
as re_exec, are currently not in the library libc.a Apart from
using the rather crude fix listed above, there is another option.
Kim Anderson (kim@dde.dk) has provided a patch that will add these
to libc.a. You can probably obtain this patch from the author, or
you can ftp it from binkley.cs.mcgill.ca in pub/386bsd.
4.2.7 Intel i82586 Ethernet Controller driver
Garrett A. Wollman has written a driver for the Intel i83586
Ethernet Controller. The driver is available from agate
in unofficial/from-ref/sys.extras.
The authors e-mail address is listed as Garrett.Wollman@uvm.edu,
attempts to send him mail there have failed.
4.2.8 PC Speaker driver for Nethack
Andrew A. Chernov has ported the Nethack PC Speaker driver to
386bsd. It allows the speaker to be controlled by applications.
Unfortunately, we are not aware of a site that distributes this,
but this patch has been posted a couple of times to the various
comp.os.386bsd groups, and the author can be contacted at
ache@astral.msk.su
This patch is included in the NetBSD source tree, although it is
not included in the distribution kernels.