* Expected behavior of "mount /mnt/root /mnt/root --bind"
@ 2015-08-29 3:32 james harvey
2015-08-29 3:58 ` Isaac Dunham
0 siblings, 1 reply; 2+ messages in thread
From: james harvey @ 2015-08-29 3:32 UTC (permalink / raw)
To: util-linux
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?
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Expected behavior of "mount /mnt/root /mnt/root --bind"
2015-08-29 3:32 Expected behavior of "mount /mnt/root /mnt/root --bind" james harvey
@ 2015-08-29 3:58 ` Isaac Dunham
0 siblings, 0 replies; 2+ messages in thread
From: Isaac Dunham @ 2015-08-29 3:58 UTC (permalink / raw)
To: james harvey; +Cc: util-linux
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
^ permalink raw reply [flat|nested] 2+ messages in thread
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