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Re: quotactl returns double values
- To: Tod McQuillin <devin_(_at_)_spamcop_(_dot_)_net>
- Subject: Re: quotactl returns double values
- From: Mike Pritchard <mpp_(_at_)_mail_(_dot_)_mppsystems_(_dot_)_com>
- Date: Sun, 10 Feb 2008 17:27:33 -0600
- Cc: freebsd-hackers_(_at_)_freebsd_(_dot_)_org, Ivan Georgiev <yngwiie_(_at_)_bk_(_dot_)_ru>
On Sun, Feb 10, 2008 at 01:04:24PM +0900, Tod McQuillin wrote:
> On Sat, 9 Feb 2008, Ivan Georgiev wrote:
> >I was just playing, trying to see how quotactl works,
> >but in all my tries the values returned are doubled,
> >the values stored in my_st->dqb_bhardlimit and my_st->dqb_curblocks
> >are the real values times two, the hard limit on the user is 102400K,
> >but my_st->dqb_bhardlimit holds 204800K.
> I hope you are remembering that the limits are measured in blocks -- a block is
> 512 bytes.
> Thus a limit of 102400K is 204800 blocks, since each 1K holds 2 blocks.
You can also use "quota -r" to dump out the raw quota data.
Simple answer is, internally the quota system maintains its block counts
by counting the # of blocks that would be returned by stat(2) in the
st_blocks field, which is the # of 512-byte blocks used by the file.
Externally, (e.g. what it displays, takes as input) is 1024-byte blocks counts.
mpp @ FreeBSD.org
"If tyranny and oppression come to this land, it will be in the guise
of fighting a foreign enemy." - James Madison (1787)
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