On Jun 27, 2014, at 4:08 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
>
> On Jun 27, 2014, at 2:07 PM, Sébastien ROHAUT <sebastien.rohaut@xxxxxxx> wrote:
>
>> Hi,
>>
>> In the wiki, it's said we can mount subvolumes with different mount options. nosuid, nodev, rw and ro are listed, as valid generic mount options.
>
> This might require 3.15. I don't recall it working with early 3.14 kernels, but by 3.14.3 I'd moved onto testing 3.15.
[root@f20v ~]# mount /dev/sda3 /mnt
[root@f20v ~]# btrfs subvol create /mnt/test
Create subvolume '/mnt/test'
[root@f20v ~]# umount /mnt
[root@f20v ~]# mount -o ro,subvol=test /dev/sda3 /mnt
mount: /dev/sda3 is already mounted or /mnt busy
/dev/sda3 is already mounted on /
/dev/sda3 is already mounted on /home
/dev/sda3 is already mounted on /var
/dev/sda3 is already mounted on /boot
[root@f20v ~]# uname -r
3.14.6-200.fc20.x86_64
I don't know if this feature will be backported to stable kernels. If not, then probably the wiki should say it's a 3.15+ feature.
Chris Murphy
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