Re: [Libvir] Re: parted/LVM for ET [Storage manager initial requirements and thoughts

Daniel P. Berrange wrote: >On Thu, Jun 14, 2007 at 07:16:21PM +0200, Jim Meyering wrote: >>"Daniel P. Berrange" <berrange(a)redhat.com&gt; wrote: >>>>>And (4) can be done by libvirtd using ordinary POSIX calls, so no >>>>>external library support is needed, just some work to remote those >>>>>operations (which is mostly done). >>>>Isn't doing #4 portably pretty tricky? There's still too much >>>>variation, because many of the details aren't covered by POSIX. >>>>At least for GNU df, it was -- it uses the mountlist module from gnulib: >>>We don't need to enumerate all the mount points. The admin will simply >>Lucky you :) >> >>>configure particulra directories (eg /var/lib/xen/images) as storage >>>repositories. So we only need to be able to call statfs/statvfs on >>>particular paths where we want to create a new image. >>> >>>>Of course, if your target is just Linux, then it is easier. >>>Minimally we have to target Solaris too, since we know they already use >>>libvirt. >>Ok. Then this (also used by df) might help, if you ever >>need portability to e.g., older Solaris, *BSD, AIX, HP-UX, etc. >> >>http://cvs.sv.gnu.org/viewcvs/gnulib/lib/fsusage.c?root=gnulib&view=markup > >Unfortunately we can't use that. The license is GPL, while libvirt needs >to be LGPL :-( I'm sure we can use it as guidance for possible problems though. I'm quite surprised there are portability problems with statfs. Isn't it a v7 call, didn't think there wouldn't be much that could go wrong :-)