This is a discussion on RE: [Fwd: [sfwnv-discuss] net-snmp 5.4.1 pre3 released] - SNMP ; OK, I found the ZFS 1 Tb bug. I'm cross posting this to sfwvn-discuss and net-snmp-coders for the widest possible distribution. As you noticed earlier ( http://groups.google.com/group/maili...s/msg/57a1f8db 7387d8a3), it has to do with statvfs. If we compile without LARGEFILE support, ...
OK, I found the ZFS 1 Tb bug. I'm cross posting this to sfwvn-discuss
and net-snmp-coders for the widest possible distribution.
As you noticed earlier
7387d8a3), it has to do with statvfs.
If we compile without LARGEFILE support, it (as I suspected) is the
wrong datatype and it rolls over into negative numbers.
If we do compile with LARGEFILE support, we run into trouble with
swapctl. When I google on that problem, I find myself (one of my many
aliases) complaining about it in vain.
I'm not the only having trouble.
Looks like the kde folks may have found a workaround,
but it looks like all they're doing is faking out the linker. I propose
pretty much the same thing here
Please, please don't tell me I have to rewrite swapctl.
I don't think it's going to do any good anyway, because we have the
secondary issue of ZFS not reporting the size correctly due to other
issues. As you note;
"The design of ZFS filesystems is such that it doesnot have fixed
hrStorageAllocationUnits, so the size calculation leads to wrong
ZFS has it own routines to get the filesystem stats. "
However, I haven't been able to find those routines.
I've been through the source tour here:
but haven't found any sort of API which would report filesystem stats
unless I'm missing something really obvious.
Eric Schrock has noted;
"See zfs_prop_get() as well as zfs_get_user_props(). Of course, these
functions are subject to change without notice, but I assume you know
that already ;-)"
No, I didn't and I need a stable API.
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