From owner-freebsd-net  Sun Feb 16 18:19:41 2003
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Date: Mon, 17 Feb 2003 11:19:39 +0900
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From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp>
To: Brooks Davis <brooks@one-eyed-alien.net>
Cc: Abdul Basit <basit@basit.cc>, net@FreeBSD.ORG,
	6bone@mailman.isi.edu
Subject: Re: pim6sd crash
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>>>>> On Sun, 16 Feb 2003 14:51:45 -0800, 
>>>>> Brooks Davis <brooks@one-eyed-alien.net> said:

>> >  on freebsd 5.0-Release, pim6sd crashes if i execute
>> > ifconfig gifX destroy if it is running in background,
>> > i need to restart it manually.
>> 
>> >  pim6sd display 'check_vif_state' Device not configured
>> > and exits. any workaround ?
>> 
>> A workaround is not to destroy an interface when pim6sd is running on
>> the interface.
>> 
>> Note that this kind of trouble is not specific to pim6sd.  Dynamic
>> interface creation/deletion is a big architectural change to the
>> traditional BSD kernel, and I bet there are many other applications
>> affected by such an operation.

> The user of the destroy command of ifconfig is expected to be paying
> attention.  This is the functionaly equivalent of yanking a NIC out
> of its slot.  It is the case that applications that can't handle this
> are broken and need to be fixed becase you shouldn't count on any
> interfaces staying around.

(Just in case) I didn't intend to say create/destroy is the wrong
approach and pim6sd doesn't need a fix.  My point is that
create/destroy is a big change that can affect many applications
(including pim6sd) and that a "workaround" is not to use the operation
for now.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp

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