LU-1032 build: Honor --disable-modules option in spec file

All the way back to 2004 Lustre has supported an option to
disable the compilation of the kernel modules.  This can be useful
because there are situations where only the user space componets
are required.

For example, when the Lustre kernel modules are either a) provided
by the kernel, or b) proivded as a dkms package.  In both of these
cases it's desirable to be able to build the lustre package without
building lustre-modules subpackage.

The patch adds that missing functionality to the existing lustre
spec file by leveraging the existing --disable-modules configure
option.

Additionally, a small fix was made to lustre/quota/autoMakefile.am
because it didn't properly support the --disable-modules option.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Change-Id: Ic4f4f7f19da9951b47c587399a71c42fb0e720d0

lustre.spec.in

@@ -20,6 +20,7 @@
 %{!?lustre_name: %global lustre_name lustre}
 %{!?build_lustre_tests: %global build_lustre_tests 1}
 
+%{!?build_lustre_modules: %global build_lustre_modules 1}
 %{!?build_lustre_osd_ldiskfs: %global build_lustre_osd_ldiskfs 0}
 %{!?build_lustre_osd_zfs: %global build_lustre_osd_zfs 0}
 
@@ -83,6 +84,7 @@ Requires: lustre-osd
 %description
 Userspace tools and files for the Lustre file system.
 
+%if %{build_lustre_modules}
 %package modules
 Summary: Kernel Lustre modules for Linux %{kversion}
 %if %{defined cross_requires}
@@ -134,6 +136,7 @@ to code that bridges individual file systems. This specific package provides an
 implementation of the OSD API for using the ZFS filesystem as the underlying
 backing store of a Lustre server.
 %endif
+%endif
 
 %package source
 Summary: Object-Based Disk storage driver source
@@ -221,6 +224,26 @@ CONFIGURE_ARGS="$CONFIGURE_ARGS --enable-tests --enable-liblustre-tests"
 CONFIGURE_ARGS="$CONFIGURE_ARGS --disable-tests --disable-liblustre-tests"
 %endif
 
+%if %{build_lustre_modules}
+CONFIGURE_ARGS="$CONFIGURE_ARGS --enable-modules"
+%else
+CONFIGURE_ARGS="$CONFIGURE_ARGS --disable-modules"
+%endif
+
+# May be enabled when build_lustre_modules=0 to enable utility support.
+%if %{build_lustre_osd_ldiskfs}
+CONFIGURE_ARGS="$CONFIGURE_ARGS --with-ldiskfs"
+%else
+CONFIGURE_ARGS="$CONFIGURE_ARGS --without-ldiskfs"
+%endif
+
+# May be enabled when build_lustre_modules=0 to enable utility support.
+%if %{build_lustre_osd_zfs}
+CONFIGURE_ARGS="$CONFIGURE_ARGS --with-zfs"
+%else
+CONFIGURE_ARGS="$CONFIGURE_ARGS --without-zfs"
+%endif
+
 # if %%kdir was given, make sure it's not in the configure arguments
 if [ -n "%kdir" ]; then
 	CONFIGURE_ARGS=$(echo $CONFIGURE_ARGS | sed -e 's/"\?--with-linux=[^ ][^ ]* \?//')
@@ -324,7 +347,9 @@ fi
 
 %if %{build_lustre_tests}
 echo '%attr(-, root, root) %{_libdir}/lustre/tests/*' >lustre-tests.files
+%if %{build_lustre_modules}
 echo '%attr(-, root, root) %{?rootdir}/lib/modules/%{kversion}/updates/kernel/fs/lustre/llog_test.*' >>lustre-tests.files
+%endif
 if [ -d $RPM_BUILD_ROOT%{_libdir}/lustre/liblustre/tests ] ; then
   echo '%attr(-, root, root) %{_libdir}/lustre/liblustre/tests/*' >>lustre-tests.files
 fi
@@ -357,6 +382,7 @@ find $RPM_BUILD_ROOT%{?rootdir}/lib/modules/%{kversion}/updates -name "*.ko" -ty
 
 %files -f lustre.files
 
+%if %{build_lustre_modules}
 %files modules
 %attr(-, root, root) %{?rootdir}/lib/modules/%{kversion}/updates/*
 %if %{build_lustre_tests}
@@ -390,6 +416,7 @@ find $RPM_BUILD_ROOT%{?rootdir}/lib/modules/%{kversion}/updates -name "*.ko" -ty
 %attr(0555, root, root) %{rpm_post_base}-osd-zfs.sh
 %endif
 %endif
+%endif
 
 %files source
 %attr(-, root, root) %{_prefix}/src/lustre-%{version}
@@ -414,6 +441,7 @@ if [ -x %{rpm_post_base}.sh ]; then
 fi
 %endif
 
+%if %{build_lustre_modules}
 %post modules
 %if %{defined rpm_post_base}
 if [ -x %{rpm_post_base}-modules.sh ]; then
@@ -640,6 +668,7 @@ fi
 rm /var/run/%{name}-osd-zfs
 %endif
 %endif
+%endif
 
 %if %{build_lustre_tests}
 %post tests

lustre/quota/autoMakefile.am

@@ -34,6 +34,12 @@
 # Lustre is a trademark of Sun Microsystems, Inc.
 #
 
+if MODULES
+if LINUX
+
 modulefs_DATA = lquota$(KMODEXT)
 
+endif LINUX
+endif MODULES
+
 MOSTLYCLEANFILES := @MOSTLYCLEANFILES@