On 06/28/2010 04:33 AM, Patrick J. LoPresti Wrote:> I have spent the weekend assembling a small OCFS2 cluster, under the
> Pacemaker cluster stack, using nothing but Debian experimental
> packages.
>
> I found a few problems along the way -- and I have reported them as
> bugs to the Debian maintainers -- but I do have it all working now.
>
> The final problem I encountered was this one:
>
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=587287
>
> Briefly, mkfs.ocfs2 was bombing out with "Unable to access cluster
> service while initializing the dlm". This ultimately comes from lines
> 716-720 in ocfs2-tools-1.4.4/libo2dlm/o2dlm.c:
>
> ctxt->ct_lib_handle = dlopen("libdlm_lt.so",
> RTLD_NOW | RTLD_LOCAL);
> if (!ctxt->ct_lib_handle)
> goto out;
>
> On Debian, ".so" symlinks are included in development
("-dev")
> packages, not in production packages. This is because they are
> normally only used at compile time, not at run time; the compiler
> always includes the major number for the dependency in the executable.
> (To see what I mean, run "ldd" on just about any executable; you
will
> find lots of dependencies on libfoo.so.N, but none on libfoo.so.)
>
> I could submit this as a bug against the Debian redhat-cluster
> package, asking them to move the libdlm_lt.so symlink from the
> libdlm-dev package to the libdlm3 package. But I do not actually
> think that would be correct. Just as "ldd /bin/cat" shows how
cat
> depends on libc.so.6 (not libc.so), in point of fact libo2dlm depends
> on a particular major version of the libdlm_lt.so shared object (i.e.,
> a particular major version of the binary API).
>
> So, if I submit a patch changing the dlopen() in o2dlm.c to load
> "libdlm_lt.so.3" instead of "libdlm_lt.so", will the
OCFS2 maintainers
> accept it? If not, why not?
A similar patch has been in SLES11 HAE SP1 for a while (novell bugzilla
bnc#543119), which is not upstream yet. FYI.
diff -rup ocfs2-tools.orig//libo2dlm/o2dlm.c ocfs2-tools/libo2dlm/o2dlm.c
--- ocfs2-tools.orig//libo2dlm/o2dlm.c 2008-10-27 01:10:50.000000000 +0800
+++ ocfs2-tools/libo2dlm/o2dlm.c 2009-11-03 16:49:38.000000000 +0800
@@ -713,7 +713,7 @@ static errcode_t load_fsdlm(struct o2dlm
goto out;
}
- ctxt->ct_lib_handle = dlopen("libdlm_lt.so",
+ ctxt->ct_lib_handle = dlopen("libdlm_lt.so.3",
RTLD_NOW | RTLD_LOCAL);
if (!ctxt->ct_lib_handle)
goto out;
--
Coly Li