Date: Fri, 13 Apr 2001 13:23:23 -0600 From: "Matt Simerson" <mpsimerson@hostpro.com> To: "'freebsd-hackers@freebsd.org'" <freebsd-hackers@freebsd.org> Subject: Quota reporting is inaccurate. Message-ID: <8D18712B2604D411A6BB009027F6449801B4B5B6@0SEA01EXSRV1>
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I have an streaming server that does a mere three things in life. It accepts
FTP connections from users with local accounts and streams the files back
via Real streaming server or Darwin Streaming Server. That's it, other than
some log file processing and backups, that's all this machine does.
In the last 8 months of service, a few anomolies related to quotas have
popped up. Every time it happens, the quota mechanism reports that the user
is using more space than they really are. I've dug through the mailing list
archives and found another user with this same problem so I'm going to add a
little fuel that fire and hope a resolution to this can be found.
On this machine all users get a fixed quota size which they are obliged not
to exceed. Quota's are set up as follows:
real1# more /etc/fstab
# Device Mountpoint FStype Options Dump
Pass#
/dev/mlxd0s1b none swap sw 0
0
/dev/mlxd0s1a / ufs rw 1
1
/dev/mlxd1s1e /usr ufs rw,userquota 2
2
/dev/mlxd0s1e /var ufs rw 2
2
proc /proc procfs rw 0
0
Quotas are enabled at boot time:
real1# grep quota /etc/rc.conf
enable_quotas="YES"
For the most part, quota's work just fine. I build this machine on FreeBSD
4.1.1-STABLE shortly after 4.1.1 was released. The server has been humming
along, doing it's streaming thing quite nicely. It's only reboot in the last
8 months was last month when I upgraded from 4.1.1 to 4.2-STABLE (4.3-BETA)
hoping for a fix to the quota problem. FTP connections are chrooted to the
users home directory so the user cannot write files outside it. We can see
how much space is in use as follows:
real1# du -d1 ~dahl
190827 /usr/home/dahl
So the user is only using 190MB of space on /usr. We can verify this by
checking the entire /usr filesystem and verifying all results are in ~dahl
which I have done as follows:
real1# find /usr -user dahl
So, the only files owned by dahl that exist live in his home dir as
expected. Doing a long list on the files confirms the file sizes and du's
count of 190MB:
real1# ll ~dahl
total 190826
-rw-r--r-- 1 dahl user 628 Mar 27 15:10 .cshrc
-rw-r--r-- 1 dahl user 299 Mar 27 15:10 .login
-rw-r--r-- 1 dahl user 160 Mar 27 15:10 .login_conf
-rw------- 1 dahl user 371 Mar 27 15:10 .mail_aliases
-rw-r--r-- 1 dahl user 331 Mar 27 15:10 .mailrc
-rw-r--r-- 1 dahl user 722 Mar 27 15:10 .profile
-rw------- 1 dahl user 276 Mar 27 15:10 .rhosts
-rw-r--r-- 1 dahl user 852 Mar 27 15:10 .shrc
-rwxr-xr-x 1 dahl user 108 Mar 27 15:10 .xinitrc
-rwxr-xr-x 1 dahl user 108 Mar 27 15:10 .xsession
-rw-r--r-- 1 dahl user 35826182 Apr 9 20:26 Mon040901.rm
-rw-r--r-- 1 dahl user 47932775 Apr 9 12:03 Phish.rm
-rw-r--r-- 1 dahl user 35451065 Apr 10 17:33 Tue041001.rm
-rw-r--r-- 1 dahl user 37613531 Mar 30 17:40 best0f5.rm
-rw-r--r-- 1 dahl user 38383851 Mar 30 08:17 bestof4.rm
We verify our quota settings noting that quota's think that dahl is using
345MB when in reality it should be reporting 190MB:
real1# quota dahl
Disk quotas for user dahl (uid 4639):
Filesystem blocks quota limit grace files quota limit
grace
/usr 345659 358400 358400 21 1000 2000
OK, so somehow our quota consistency got maligned. Running quotacheck should
fix this right? So, we run quotacheck on our /usr filesystem:
real1# quotacheck -v /usr
*** Checking user quotas for /dev/mlxd1s1e (/usr)
unknown uid: 1751
root fixed: blocks 2508870 -> 2508868
real fixed: blocks 197062 -> 197046
So, quotacheck doesn't discover or fix the discrepancy. :-(
Any ideas why this behavior would occur? Better yet, any idea how to fix
it?
Matt
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