Quota mods needed for journaled quota
hi Stephen,
Quoted 11 lines · Stephen C. Tweedie
Subject: Re: Quota mods needed for journaled quota
...Quoted 4 lines
This would allow ext3 to do that which it needs to do differently at
Q_QUOTAONand 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 togetherAdding the
init_quotahook would do that, as the filesystem will be able to install its owndq_opsmethods 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.
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