[Samba] Re: samba quotas

Dragan Krnic dkrnic at lycos.com
Mon May 10 15:12:37 GMT 2004

>> Hi guys, we need to update our samba service from 2.2.8a 
>> to samba 3.0.x (so that we can upgrade our AD from Win2k 
>> to Win2k3).  The problem I am having is with the quotas.
> I was never able to use the quota functions of samba. I use
> Suse 8.2 with Samba 3.0.3 and XFS. Even the latest samba 
> version doesn't recognize quotas correctly. For me quota 
> code is broken since beginning in samba.
> To get them displayed I use a dirty hack.
> In smb.conf I've added the following line:
> dfree command = "/etc/script.sh %U"
> script.sh:
> #!/bin/sh
> used_space=`/usr/bin/quota -u $1 | tail -1 | awk '{print $2}'`
> quota_space=`/usr/bin/quota -u $1 | tail -1 | awk '{print $4}'`
> used_files=`/usr/bin/quota -u $1 | tail -1 | awk '{print $5}'`
> quota_files=`/usr/bin/quota -u $1 | tail -1 | awk '{print $7}'`
> if [ "$used_files" == "$quota_files" ];
>     then used_space=$quota_space
>     fi
> free_space=`expr $quota_space - $used_space`
> echo "$quota_space $free_space"

I didn't know it was broken. What's broken? It works fine
for me. I don't limit users. I limit projects (groups). Since 
a user may be in different projects there wouldn't be a single 
quota value or dfree number anyway. The important point is that
each group can only use up what's allocated to it. I display 
quotas in a table on swat's status page like this:

   (See also: "What to do, if Quota is exceeded?")

   Group    ?    Used MBs   SoftLimit   HardLimit 
   TOTAL           525637      665000      860000 
   CALCX            70728           0           0
   PM1      1      105741       90000      110000  
   PM3              67125       70000       80000 
   root              1985           0           0 
   users             2436       10000       15000 

Everyone can see how much of the quota is used up in all of
the groups he belongs to, root can see it all. The question
mark column numbers the days remaining until grace expires.
There's also a mail reminder to the project leader every day 
with a size-sorted list of all infringing files.

By the way, I think your script is broken. Not only can you
spare 3 iterations of quota and awk but the 5th and 7th 
columns ($5 and $7) of the quota output are "grace" and 
"(#files-)quota" if a value exceeds the limit instead 
of "files" and "limit", which is probably intended by you.
A more careful coding would be:

  quota -u $1 | tail -1 | awk 'NF>7{$5=""} {print}' | \
    read a used_space a quota_space used_files a quota_files a

But I digress. What did you think was wrong with quotas in samba?

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