Re: [PATCH v2 2/2] ext4: print quota journalling mode on (re-)mount

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On Mon, 19 Oct 2020, Jan Kara wrote:

On Sun 18-10-20 05:02:27, Roman Anufriev wrote:
Right now, it is hard to understand what quota journalling type is enabled:
you need to be quite familiar with kernel code and trace it or really
understand what different combinations of fs flags/mount options lead to.

This patch adds printing of current quota jounalling mode on each
mount/remount, thus making it easier to check it at a glance/in autotests.
The semantics is similar to ext4 data journalling modes:

* journalled - quota accounting and journaling are enabled
* writeback  - quota accounting is enabled, but journalling is disabled

The above two descriptions are still somewhat misleading - in fact we don't
know whether accounting is enabled or not. Just *if* it is enabled, quota
will be journalled / non-journalled. So I'd probably describe it like:
* journalled - quota configured, journalling will be enabled
* writeback - quota configured, journalling will be disabled

Yeah, you are right, I'll fix this in v4.

We've talked with Ted on last ext4 conf call and we agreed that it's
probably time to deprecate old style quotas in external quota files and
transition everybody to using quotas with quota feature. That way things
will get simpler again. But before we can disable that functionality, it
will take a few years of deprecation warnings etc. so that's not directly
related to your patch here. JFYI.

It will be great!

								Roman



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