From: Isaac Dunham <ibid.ag@gmail.com>
To: james harvey <jamespharvey20@gmail.com>
Cc: util-linux@vger.kernel.org
Subject: Re: Expected behavior of "mount /mnt/root /mnt/root --bind"
Date: Fri, 28 Aug 2015 20:58:11 -0700 [thread overview]
Message-ID: <20150829035810.GB1616@localhost> (raw)
In-Reply-To: <CA+X5Wn45VNhXYztEVxrccF6uePshfFv3X3isB39y5RYT1-uUAg@mail.gmail.com>
On Sat, Aug 29, 2015 at 03:32:30AM +0000, james harvey wrote:
> If /dev/vda is a btrfs volume (not using partitioning) and is mounted to /mnt
>
> And if /mnt/root is made as a normal directory (not a subdirectory)
>
> And if an nfs share is mounted to /mnt/root/mnt
>
> And for some reason "mount /mnt/root /mnt/root --bind" is ran
>
> ... Should /mnt/root/mnt now be viewable as an empty mountpoint,
> hiding the nfs share?
Yes, since you used --bind not --rbind.
> Right now it does that. Not sure what the expected behavior would be.
> Not sure if "mount x x" is ever desired to be allowed, or if it should
> refuse to do that.
It's a documented and used feature that you can bind mount a directory
over itself.
HTH,
Isaac Dunham
prev parent reply other threads:[~2015-08-29 3:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-29 3:32 Expected behavior of "mount /mnt/root /mnt/root --bind" james harvey
2015-08-29 3:58 ` Isaac Dunham [this message]
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