Re: [sshfs] df reports wrong disk space usage on solaris

[Miklos S. <mi...@sz...>]

On Tue, 01 Jun 2010, Sandon Van Ness wrote:
> I installed OpenSSH_5.3p1 on my opensolaris file-server as the default
> version didn't seem to support disk space usage at all (showed 1000G
> with 0 used) and now it shows the correct percentage but it is giving me
> out of wack values (in the Petabyte range):
> 
> root@sabayonx86-64: 09:21 AM :~# df -H
> Filesystem             Size   Used  Avail Use% Mounted on
> /dev/sdc2               35G    32G   3.3G  91% /
> udev                    13G   283k    13G   1% /dev
> none                   2.1M   324k   1.8M  16% /lib/rcscripts/init.d
> /dev/sdc1              100M    89M    12M  89% /boot
> /dev/sda1               84G    60G    25G  71% /winxp
> tmpfs                   13G      0    13G   0% /dev/shm
> /dev/sdc3               18T    15T   3.6T  80% /data
> box:/data              8.9T   7.9T   1.1T  89% /colo
> osol:/data             4.5P   3.2P   1.3P  72% /osol

I believe the problem is that "df" uses statfs, not statvfs.  If
f_frsize and f_bsize differ then df will give the wrong answer, as
statfs doesn't have an f_frsize field.

Try "stat -f /osol" to verify this theory.

> 
> This is not the correct size of the volume as it should be 18TB with df -H:
> 
> root@opensolaris: 09:24 AM :~# df -H /data
> Filesystem             Size   Used  Avail Use% Mounted on
> data                    18T    13T   5.1T  72% /data
> 
> The percentage it lists; however, is ok. Also when mounting the near
> same size file-sytem on a linux host to another linux machine I see the
> correct values:
> 
> hptc ~ # df -H /sshfs
> Filesystem             Size   Used  Avail Use% Mounted on
> 1.1.1.3:/data           18T    15T   3.6T  80% /sshfs

Yep, linux sets f_frsize and f_bsize to the same values (presumably
not to break df).

Thanks,
Miklos