2.2.7 NFS quota error

Juan Antonio Martinez (jantonio@dit.upm.es)
Tue, 18 May 1999 11:57:39 +0200 (CET)

Server:
Linux 2.2.7 + knfsd-1.3a ( 2.2.7 patch applied )
Dual Pentium SMP box , RAID 0 disk with quota support enabled
Clients:
Over 110+ Linux 2.0.35 NFS clients sharing same disk ( this is a students
lab in a University )

Here is a reproductible log. Seems that rename function fails in re-checking
quotas when quota is exceeded.

( l034 is a client; cuentas is the server )

[jamc@l034 jamc]$ quota
Disk quotas for user jamc (uid 16062):
Filesystem blocks quota limit grace files quota limit grace
cuentas:/users/cuentas
521 11250 15000 72 0 0

( a normal quota of my user test directory )

[jamc@l034 jamc]$ dd if=/dev/zero of=kk bs=1024 count=14000
14000+0 records in
14000+0 records out
[jamc@l034 jamc]$ quota
Disk quotas for user jamc (uid 16062):
Filesystem blocks quota limit grace files quota limit grace
cuentas:/users/cuentas
14577* 11250 15000 7days 73 0 0
[jamc@l034 jamc]$ rm kk
[jamc@l034 jamc]$ quota
Disk quotas for user jamc (uid 16062):
Filesystem blocks quota limit grace files quota limit grace
cuentas:/users/cuentas
521 11250 15000 72 0 0

( just a test of quota. seems to work, but.... )

[jamc@l034 jamc]$ dd if=/dev/zero of=kk bs=1024 count=14000
14000+0 records in
14000+0 records out
( still in quota but next to limit )

( Now try to get some data into SAME file.... and crash )

[jamc@l034 jamc]$ dd if=/dev/zero of=kk bs=1024 count=1000
dd: kk: Disc quota exceeded
421+0 records in
420+0 records out
[jamc@l034 jamc]$ quota
Disk quotas for user jamc (uid 16062):
Filesystem blocks quota limit grace files quota limit grace
cuentas:/users/cuentas
15000* 11250 15000 7days 73 0 0
( whooops !!! what happened )

[jamc@l034 jamc]$ du -s .
944 .
( the real size: 521 original + 421 of "kk" file... but quota talks about the
sum of old an new "kk" file..... )

I've not been able to reproduce this error when using local ( non-NFS )
filesystem in the server so seems to be NFS-related error

Temporary solution: run quotacheck -a every hour in the server ( about 15Gbytes
partition. snifff :-( )

Any ideas?

Juan Antonio \|||/
/ _ _ \
\ o o /
=========================o00o===U===o00o======================================
Juan Antonio Martínez Universidad Politécnica de Madrid
email: jantonio@dit.upm.es E.T.S.I Telecomunicación
http://www.dit.upm.es/~jantonio Ciudad Universitaria s/n
Tel: 34-1-5495700 ext 328 Centro de Cálculo
Fax: 34-1-3367333 Madrid, Spain
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