From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <01405c4bddab6004f67d7e604d29ba72@quanstro.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] venti woes with brand new install
From: erik quanstrom <quanstro@quanstro.net>
Date: Sat,  8 Sep 2007 09:43:20 -0400
In-Reply-To: <46e290f8.0d375e0a.1d4b.fffff33d@mx.google.com>
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as a salute to the days of typing in machine code from smalltalk
magazine.  (wasted youth!)  here is the backtrace complete with
errors introduced by a faulty connection between the image and
keyboard.

abort+0x0 /sys/src/libc/9sys/abort.c:6
freezblock(b=0x17d1f90)+0x38 /sys/src/cmd/venti/srv/zblock.c:63
freeifile(f=0xa4918)+0x12 /sys/src/cmd/venti/srv/ifile.c:67
runconfig(file=0xdfffef92,config=0xa496c)+0x8e /sys/src/cmd/venti/srv/config.c:188
	f=0xdfffef92
	ok=0x0
	line=0x0
	s=0x17cff8e
	flds=0x17cff8e
	i=0x2
	sv-0x17cfe68
	av=0x17cfe88
initventi(file=0xdfffef92,conf=0xa496c)+0x3f /sys/src/cmd/venti/srv/config.c:21
threadmain(argv=0xdfffef70,argc=0x0)+0x139) /sys/src/cmd/venti/srv/venti.c:113
	vaddr=0xdfffefa6
	haddr=0xdfffefb9
	configfile=0xdfffef92
	webroot=0x0
	mem=0x0
	icmem=0x0
	bcmem=0x0
	_argc=0xfefe0068
	_args-0x4e474
	config=0x17cfea8
[...]

could you send the output of venti/config? and what does acid
say to this

	acid: *(0x17cff8e\s)

you might also get more information by inspecting how zmagic
is corrupt, e.g. replace freezblock with something like this.
(may or may not compile.)

void
freezblock(ZBlock *b)
{
	if(b){
		if(memcmp(b->data+b->_size, zmagic, OverflowCheck) != 0){
			int i;
			uchar *s;
			char *fmt;

			s = (uchar*)(b->data+b->_size);
			fmt = "  %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n";

			fprint(2, "corrupt zblock: %p b->_size=%d", b, b->_size);
			for(i = 0; i < OverflowCheck; i += 8, s += 8)
				fprint(2, fmt, s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7]);
			abort();
		}
		memset(b->data+b->_size, 0, OverflowCheck);
		free(b->free);
	}
}

- erik

> Hi everyone!
> I'm trying to configure a new cpu+auth server using the instructions in the wiki, and I've crossed a problem with venti.
> Here is what I did:
> 1, downloaded the sept. 6th iso from plan9 download site
> 2, installed a fossil+venti system (default setup)
> 3, followed the wiki instructions to set up a cpu+auth server (compiled my own 9pccpuf kernel with default config)
> then I rebooted my computer (luckily set up a menu with options to start the old terminal kernel),
> and got venti suicide, here is a screenshot of the crash: http://jsoros.free.fr/CIMG5212.JPG , after this the computer reboots. We did a little debugging with cinap on irc, here is how we did it:
> 1, copy /386/bin/venti/venti to 9fat
> 2, boot into the live-cd
> 3, run /n/9fat/venti -s -c /dev/sdC0/arenas -a 'tcp!127.1!17034' -h 'tcp!127.1!8000'
> it suicides here too
> 4, run acid on the crashed venti, here is the output of acid: http://jsoros.free.fr/CIMG5213.JPG
> Thanks for any insite on what could be wrong and what I could do to fix it.
>
> Regards
> John