Re: Weird behaviour with project quotas

[Dave Chinner <david@fromorbit.com>]

On Thu, Nov 28, 2024 at 05:14:58PM +0100, Emmanuel Florac wrote:
> 
> Hello,
> 
> As far as I understand, and from my tests, on folders on which a
> project quota is applied, either the available quota or the actually
> avialable space should be reported when using "df".

Only if you are using project quotas as directories quotas. i.e.
the directory you are querying with df needs to have the
XFS_DIFLAG_PROJINHERIT flag set on it for df to behave this way.

> However on a
> running system (Debian 12, kernel 6.1 Debian) I have incoherent results:

32 bit or 64 bit architecture?

> The volume /mnt/raid is 100 TB and has 500GB free.
> 
> There are several folders like /mnt/raid/project1, /mnt/raid/project2
> etc with various quotas (20TB, 30TB, etc).

Output of df and a project quota report showing usage and limits
would be useful here.

Then, for each of the top level project directories you are querying
with df, also run `xfs_io -rxc "stat" <dir>` and post the output.
This will tell us if the project quota is set up correctly for df to
report quota limits for them.

It would also be useful to know if the actual quota usage is correct
- having the output of `du -s /mnt/raid/project1` to count the
blocks and `find /mnt/raid/project1 -print |wc -l` to count the
files in quota controlled directories. That'll give us some idea if
there's a quota accounting issue.

> Any idea on what could be going wrong ?

No. There's nothing obvious that stands out in the current TOT
code...

-Dave.
-- 
Dave Chinner
david@fromorbit.com