From: Dmitry Monakhov <dmonakhov@openvz.org>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 2/3] quota: introduce get_id callback
Date: Wed, 03 Feb 2010 08:38:15 +0300 [thread overview]
Message-ID: <874olyg9q0.fsf@openvz.org> (raw)
In-Reply-To: <20100202160509.GI7056@quack.suse.cz> (Jan Kara's message of "Tue, 2 Feb 2010 17:05:09 +0100")
Jan Kara <jack@suse.cz> writes:
> On Tue 02-02-10 18:00:24, Dmitry Monakhov wrote:
>> During some quota oparations we have to determine quota_id for given inode
>> according to quota_type. But only USRQUOTA/GRPQUOTA id are intermediately
>> accessible from generic vfs-inode. This patch introduce new per_sb quota
>> operation for this purpose.
> Hmm, but you do not intend to ever change what is returned for USRQUOTA
> and GRPQUOTA, do you? So we could just have something like
Hmm... In fact i've considered this option. For example:
In case of containers(trees), each container administrator want
user/group quota to work inside it's container. I've considered
following approach:
1) enlarge qid_t to u64
2) encode quota_uid and group_uid like follows:
quid = treeid << 32 + uid
qgid = treeid << 32 + gid
3) Introduce new 64-bit quota format file to support wide qid_t.
Currently i dont know better way to support user/group quota
inside tree. It does not affect old fs-internal code, just replace
all hard-coded (int => u64) in fs/quota-XXX. Old 32-bit quota users
not affected because qid_t will be shrink ed on quota-save for
old(most of) users.
next prev parent reply other threads:[~2010-02-03 5:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-02 15:00 [PATCH 0/3] quota: RFC add extend quota types Dmitry Monakhov
2010-02-02 15:00 ` [PATCH 1/3] quota: generalize quota transfer interface Dmitry Monakhov
2010-02-02 15:00 ` [PATCH 2/3] quota: introduce get_id callback Dmitry Monakhov
2010-02-02 15:00 ` [PATCH 3/3] quota: add generic treeid quota support Dmitry Monakhov
2010-02-02 16:10 ` Jan Kara
2010-02-02 16:05 ` [PATCH 2/3] quota: introduce get_id callback Jan Kara
2010-02-03 5:38 ` Dmitry Monakhov [this message]
2010-02-03 10:47 ` Jan Kara
2010-02-03 19:54 ` Dmitry Monakhov
2010-02-02 15:48 ` [PATCH 1/3] quota: generalize quota transfer interface Jan Kara
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=874olyg9q0.fsf@openvz.org \
--to=dmonakhov@openvz.org \
--cc=jack@suse.cz \
--cc=linux-fsdevel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.