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Date: 3 Oct 2001 14:46:08 -0000
From: hiroo@oikumene.gcd.org
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Subject: bin/31009: Installing current snapshot fails at sysintall/install.c:installFilesystems()
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>Number:         31009
>Category:       bin
>Synopsis:       Installing the current snapshot fails when calling MakeDevChunk().
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 03 07:50:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Hiroo ONO
>Release:        FreeBSD-current
>Organization:
>Environment:
System: 5.0-CURRENT-20011002-JPSNAP for i386 (build at current.jp.FreeBSD.org).
>Description:
	Installation of recent current snapshot fails.
	Editing of disklabel may fail from the same reason.

	installFilesystems() of usr.bin/sysinstall/install.c rev.1.307
	calls MakeDevChunk() of lib/libdisk/create_chunk.c rev.1.61,
	which then calls the function MakeDev() of the same file.
	Then, MakeDev() calls mknod(2) which fails when DEVFS is enabled.

>How-To-Repeat:
	Install the snapshot after October 1, 2001 or edit disklabels
	from the sysinstall. It will stop with the error message like:
	  mknod of /dev/rad0a1b returned failure status!

>Fix:
	(1) Checking DEVFS MIB using sysctl(3) in MakeDev() of the libdisk
	    and skip calling mknod(2) may be the best solution.
	(2) Or checking if DEVFS is enabled or not (as above) in
	    installFilesystems() of usr.bin/sysinstall can be an alternative.
	    But, it will not avoid similar problems if other programs call
	    MakeDevChunk() or MakeDev().
	(3) Disabling DEVFS in the install kernerl may be a quick but bad
	    solution. The bug will stay if one uses sysinstall in a system
	   with DEVFS enabled (e.g. when adding a HDD).
>Release-Note:
>Audit-Trail:
>Unformatted:

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