Re: [webmin-devel] [patch] quota v2 - vsfv0 not supported before 2.4.19 kernels

[Jamie C. <jca...@we...>]

So is this the third quote format that Linux has used? Because I've seen
those aquota.{user,group} files for a while now, certainly long before
the 2.4.19 kernel.

Would it be correct to say that the old format uses quota.{user,group},
while the two new formats both user aquota.{user,group} ?

 - Jamie

On Mon, 2003-11-17 at 22:25, Christophe Chisogne wrote:
> Jamie Cameron wrote:
> > However, oddly I can enable quotas with no problems on my Redhat 9 box 
> > with the 2.4.20 kernel. Any ideas why that might be?
> 
> Yes, the 'bug' is about kernel support for new quota format
> (ie vfsv0, format of aquota.{usr,group} files)
> RH supports the new quota format since 7.1 (std kernel + patch),
> and std 2.4.20 kernel natively includes vsfv0 quota support
> (without patches).
> 
> Support for new vfsv0 quota format in kernel seems to be included
> - in std kernel >= 2.4.19 (not 2.4.18)
> - in patched kernels since RedHat >= 7.1 and Suse >= 7.2
> - in some patched 2.4.x kernels (apparently since 2.4.0)
> 
>  From sgml doc of the quota-tools
> http://cvs.sourceforge.net/viewcvs.py/*checkout*/linuxquota/quota-tools/doc/quotadoc.sgml?content-type=text%2Fplain&rev=1.2
> 
> "<sect1>V0 quota format
> <p>
> This quota format is currently used in -ac series of kernels and also in 
> new kernels distributed
> by RedHat (>= 7.1) and SuSE (>= 7.2). There are also patches for 
> standard 2.4 kernels
> which implement this format. You can download them at 
> <tt>ftp://atrey.karlin.mff.cuni.cz/pub/local/jack/quota/v2.4/</tt>.
> This format is called <tt/vfsv0/ in manpages and utilities and 
> quotafiles are usually
> called <tt/aquota.user/ and <tt/aquota.group/."
> 
> In my case, Debian GNU/Linux 3.O (aka woody), kernel included is
> 2.4.18 without quota patches, so no vfsv0 kernel support.
> Solution is to use a patch like mine, or compile/install a new
> kernel.
> 
> The ideal patch should be able to check if running kernel has vfsv0
> support or not, but I dont see how this can be done.
> 
> My patch is egocentric: with kernels < 2.4.19, the old format is used.
> But for distributions that use kernels < 2.4.19 and quota patches
> (like RH >=7.1), old format would be used because of my path,
> even if new one is supported and should be used (ex using quotas
> on a reiserfs filesystem requires vfsv0 quota format).
> 
> I think the better solution is a new option in quota module,
> which ask the quota format to use:
> - old (quota.user, quota.group)
> - new vfsv0 (aquota.user, aquota.group)
> with a doc saying vfsv0 may require std kernel >= 2.4.19
> and default value set according os running
> (ie old for debian 3.0, vfsv0 for RH >=7.1, etc)
> 
> What do you think?
> 
> >> I also replace the quota version check from v2 to v3, as I think
> >> vfsv0 support wasnt there before quotatools v3.
> 
> I'm not certain about this, but the quota-tools doc (link abose) says
> "As of version 3.01 quota utilities support original, vfsv0 and xfs 
> quota format."
> 
> So the check for quotatools version in the quota module seem wrong
> to me.
> 
>  >> Finally, I made '$_[0]' the argument of convertquota instead of
>  >> '/', which I guess was a typo.
> 
> Is it correct or am I wrong on this ?
> 
> Christophe
> 
> 
> 
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