Re: [Xen-users] Blktap2 in Debian Squeeze

[Daniel Stodden <daniel.stodden@xxxxxxxxxx>]

On Tue, 2011-08-23 at 14:02 -0400, Muriel wrote:
> On Tue, Aug 23, 2011 at 6:55 PM, Mike McClurg <mike.mcclurg@xxxxxxxxxx> wrote:
> > Ah, that's because we haven't build a 64bit blktap yet ;) We're only
> > supporting 32bit for now, but you may be able to compile it yourself.
> > Here are the source repositories you'll need:
> >
> > http://xenbits.xen.org/gitweb/?p=people/dstodden/blktap.git;a=summary
> > http://xenbits.xen.org/gitweb/?p=people/dstodden/blktap-dkms.git;a=summary
> > http://xenbits.xen.org/gitweb/?p=people/dstodden/blktap-debian.git;a=summary
> >
> > I can't promise this will work on 64bit.
> >
> 
> I'm trying to compile blktap on a 64bit system (rhel based). I'm using
> this repo:
> https://github.com/jonludlam/blktap
> 
> What is the best / most updated?

http://xenbits.xen.org/gitweb/?p=people/dstodden/blktap.git

presently recommended is xcp/volatile/autotools, to eventually be
xcp/next.

$ sh autogen.sh
$ ./configure
$ make
$ sudo make install

It's still missing some useful stuff from xen-unstable.hg/tools/blktap,
such as block-remus etc, but for vhd/aio etc. it should work fine.

It's sort of beta, beware. Report issues please.

Daniel

> On a 64bit there are a few of problems with various "long long int"
> and other type conversion. These can be put in silence "-Wno-format"
> but I guess that working on the code is the best choice.
> 
> In libvhdio.c this does not work:
> 1516         case F_SETLK:
> 1517         case F_SETLKW:
> 1518         case F_GETLK:
> 1519         {
> 1520                 struct flock *flk;
> 1521                 va_start(args, cmd);
> 1522                 flk = va_arg(args, struct flock *);
> 1523                 va_end(args);
> 1524                 LOG("%s 0x%x lock %p\n", __func__, real_fd, flk);
> 1525                 return _std_fcntl(real_fd, cmd, flk);
> 1526         }
> 1527
> 1528         case F_SETLK64:
> 1529         case F_SETLKW64:
> 1530         case F_GETLK64:
> 1531         {
> 1532                 struct flock64 *flk;
> 1533                 va_start(args, cmd);
> 1534                 flk = va_arg(args, struct flock64 *);
> 1535                 va_end(args);
> 1536                 LOG("%s 0x%x lock64 %p (%p)\n",
> 1537                     __func__, real_fd, flk, _std_fcntl);
> 1538                 return _std_fcntl(real_fd, cmd, flk);
> 1539         }
> 
> Fixed this i can compile but... God knows if it works :D
> 
> M.



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