From owner-freebsd-stable  Wed Apr 18  3:36:43 2001
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To: Sven Huster <sven.huster@mailsurf.com>
Cc: freebsd-stable@freebsd.org
Subject: Re: 4.3-RC mount_null problem on diskless machine 
In-reply-to: Your message of Wed, 18 Apr 2001 12:19:47 +0200 .
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Date: Wed, 18 Apr 2001 13:36:35 +0300
From: Danny Braniss <danny@cs.huji.ac.il>
Message-Id: <E14ppK7-0002IR-00@sexta.cs.huji.ac.il>
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this is what i do,
/etc/rc.diskless1 
config() {
        if [ -d /conf/default/etc ]; then
                cp -Rp /conf/default/etc/* $1
        fi
        if [ -d /conf/${bootp_ipa} ] ; then
                cp -Rp /conf/${bootp_ipa}/etc/* $1
        elif [ -d /conf/${bootp_ipbca} ] ; then
                cp -Rp /conf/${bootp_ipbca}/etc/* $1
        elif [ -d /conf/${hostname} ] ; then
               cp -Rp /conf/${hostname}/etc/* $1
        #else
        #        cp -Rp /conf/default/etc/* $1
        fi
}

newway () {
        mount_mfs -s 4096 -T qp120at dummy /var/tmp
        sysctl -w net.inet.icmp.icmplim=1000
        (cd /etc; pax -w -f /var/tmp/etc.tar .)
        mount_mfs -s 4096 -T qp120at dummy /etc
        (cd /etc; pax -r -f /var/tmp/etc.tar)
        config etc 
        rm -f /var/tmp/etc.tar
        umount /var/tmp
}

...
newway

danny

In message <5.1.0.14.0.20010418121945.02580930@mx01.mailsurf.com>you write:
}Hi there,
}
}i got a big problem with mount_null in FreeBSD.
}the /etc/rc.diskless* scripts use moun_null to mount their mfs mounted dirs 
}over /etc and /tmp,
}but often when i try to write on /tmp or /etc i get a panic.
}
}like as i tried to temp change the root passwd on the machine
}
}Fatal trap 12: page fault while in kernel mode
}fault virtual address   = 0x6d
}fault code              = supervisor read, page not present
}instruction pointer     = 0x8:0x6d
}stack pointer           = 0x10:0xd03d5c64
}frame pointer           = 0x10:0xd03d5cf4
}code segment            = base 0x0, limit 0xfffff, type 0x1b
}                         = DPL 0, pres 1, def32 1, gran 1
}processor eflags        = interrupt enabled, resume, IOPL = 0
}current process         = 109 (mount_mfs)
}interrupt mask          = none
}kernel: type 12 trap, code=0
}Stopped at      0x6d:
}
}Fatal trap 12: page fault while in kernel mode
}fault virtual address   = 0x6d
}fault code              = supervisor read, page not present
}instruction pointer     = 0x8:0xc0250388
}stack pointer           = 0x10:0xd03d5acc
}frame pointer           = 0x10:0xd03d5ad0
}code segment            = base 0x0, limit 0xfffff, type 0x1b
}                         = DPL 0, pres 1, def32 1, gran 1
}processor eflags        = interrupt enabled, resume, IOPL = 0
}current process         = 109 (mount_mfs)
}interrupt mask          = none
}    kernel: type 12 trap, code=0
}
}/ is mounted via nfs + /etc/rc.diskless* scripts run normally at startup
}
}i know mount_null is not declared stable (in the man page), but
}if its like this why is this thing in /etc/rc.diskless*?
}
}i fixed /tmp by changing it to a symlink, but not 100% sure what to do with 
}/etc.
}
}test# uname -a
}FreeBSD test.mailsurf.com 4.3-RC FreeBSD 4.3-RC #1: Tue Apr 17 12:16:14 GMT 
}2001     root@test.mailsurf.com:/usr/obj/usr/src/sys/MAILSURF  i386
}
}any suggestions?
}regards
}
}Sven Huster
}Senior IT Systems Administrator
}*BSD, Linux, Solaris
}
}
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}







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