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Date: Wed, 01 Feb 2006 12:45:41 -0800
From: Julian Elischer <julian@elischer.org>
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To: Ensel Sharon <user@dhp.com>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: mount_nullfs removes (temporarily) schg flag from dir ... why ?
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Ensel Sharon wrote:

>If you set schg on a directory, and then make that directory the mount
>point of a null_mount, the schg flag goes away.
>
>When you unmount it, it returns.  Why is this ?
>  
>

because the UNDERLYING directory is schg, but the new one you've covered 
it with is not....

>Would I see this behavior from mounting any kind of mount point on that
>directory, or just when mounting a null mount on it ?
>  
>

you'll always see it unless the top root directory is schg..

maybe we should make schg also mean "you can't mount anything here" :-)


>Thanks.
>
>
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