Messages in this thread |  | | From | "Nathan Scott" <> | Date | Fri, 27 Oct 2000 10:03:19 -0400 | Subject | Re: Quota mods needed for journaled quota |
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hi Stephen,
On Oct 26, 11:00am, Stephen C. Tweedie wrote: > Subject: Re: Quota mods needed for journaled quota > ... > > This would allow ext3 to do that which it needs to do differently > > at Q_QUOTAON and would also allow Jan's changes to work in such > > a way that both the current form of dquot structure and his new > > version of dquots could be used together > > Adding the init_quota hook would do that, as the filesystem will be > able to install its own dq_ops methods during the init so we get the > flexibility you are asking for anyway. >
Hmmm ... I'm not so sure. In order to have the flexibility of filesystem-specific dquot formats, the struct dquot would need to become more like struct inode/super_block, i.e. not hardcoding the ondisk structure into the incore structure (using a union and a generic pointer, as inode/super_block do).
The DQUOT_SYNC mechanism would need to be able to be overridden per-filesystem also. It isn't really as cut-and-dried as "per- filesystem" either, because an ext2/3 filesystem might make use of either the original dquot format or Jan's newer format, either at mount time or even after doing a quota_off & quota_on with a new quota file format (that would be quite clean).
But I've sidetracked completely from what you were originally talking about now, which had nothing to do with a different ondisk format at all.
cheers.
-- Nathan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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