[Users] /proc/mounts ABI change, simfs quota regression

Vasily Averin vvs at virtuozzo.com
Mon Jan 18 02:27:24 PST 2016


Michael, Dmitry,

thank you for reporting the problem.
we're investigating this problem in https://bugs.openvz.org/browse/OVZ-6655

Thank you,
	Vasily Averin

On 16.01.2016 15:44, Dmitry V. Levin wrote:
> Hi,
> 
> On Sat, Jan 16, 2016 at 12:11:14AM -0500, Michael Stauber wrote:
> [...]
>> Kernel: 2.6.32-042stab113.11 on CentOS 6.7, fully YUM updated.
> [...]
>> Upon creation of a VPS with "simfs" and 2nd level disk quota enabled the
>> quota inside the VPS doesn't work:
>>
>> VPS]# mount
>> simfs on / type simfs (rw,relatime,usrquota,grpquota)
> 
> From kernel perspective, it works.
> The first field used to be /dev/simfs in 2.6.32-042stab112 and before.
> 
>> VPS]# useradd admin
>> VPS]# edquota admin
>> edquota: Cannot stat() mounted device simfs: No such file or directory
>> No filesystems with quota detected.
> 
> The same command would work if invoked from /dev directory.
> 
> This is a regression introduced in fs/namespace.c:show_vfsmnt() during
> 2.6.32-042stab112 -> 2.6.32-042stab113 rebase.
> 
> 
> 
> 
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> 


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