Re: [PATCH] ovl: Prevent rw remount when it should be ro mount

[Miklos Szeredi]

On Wed, Jan 7, 2015 at 4:04 PM, Seunghun Lee <waydi1@xxxxxxxxx> wrote:
>> On 2015/1/6 22:02, Seunghun Lee wrote:
>>> After patch:
>>> root@qemux86:~# mount -t overlay overlay -olowerdir=lower:lower2 merged
>>> mount: warning: merged seems to be mounted read-only.
>>> root@qemux86:~# mount | grep overlay
>>> overlay on /home/root/merged type overlay (ro,relatime,lowerdir=lower:lower2)
>>> root@qemux86:~# mount -o remount,rw merged
>>> mount: warning: /home/root/merged seems to be mounted read-only.
>>> root@qemux86:~# mount | grep overlay
>>> overlay on /home/root/merged type overlay (ro,relatime,lowerdir=lower:lower2)
>>> root@qemux86:~# echo hi > merged/hi
>>> -sh: merged/hi: Read-only file system
>>> root@qemux86:~#
>>>
>> If users want a rw mount, can we give them a ro mount? I think it's
>> wrong, .remount_fs should refuse this request.

Yeah.  Applied fixed patch.

Thanks,
Mikos
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/