Add RHEL style kmod packages

Provide a Redhat specific spl-kmod.spec file which uses the old style
kmods (not kmods2) packaging.  By using the provided kmodtool script
packages can be built which support weak modules.  This allows for the
kernel to be updated without having to rebuild the SPL kernel modules.

Packages for RHEL/Centos/SL/TOSS which use this spec file can by built
as follows:

$ ./configure --with-spec=redhat
$ make rpms

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

config/spl-build.m4

@@ -229,7 +229,7 @@ AC_DEFUN([SPL_AC_RPM], [
 	RPM_SPEC_DIR="rpm/generic"
 	AC_ARG_WITH([spec],
 		AS_HELP_STRING([--with-spec=SPEC],
-		[Spec files 'generic']),
+		[Spec files 'generic|redhat']),
 		[RPM_SPEC_DIR="rpm/$withval"])
 
 	AC_MSG_CHECKING([whether spec files are available])

configure.ac

@@ -70,6 +70,10 @@ AC_CONFIG_FILES([
 	include/vm/Makefile
 	scripts/Makefile
 	rpm/Makefile
+	rpm/redhat/Makefile
+	rpm/redhat/spl.spec
+	rpm/redhat/spl-kmod.spec
+	rpm/redhat/spl-dkms.spec
 	rpm/generic/Makefile
 	rpm/generic/spl.spec
 	rpm/generic/spl-kmod.spec

rpm/Makefile.am

@@ -1 +1 @@
-SUBDIRS = generic
+SUBDIRS = generic redhat

rpm/redhat/.gitignore

@@ -0,0 +1,3 @@
+/spl-dkms.spec
+/spl-kmod.spec
+/spl.spec

rpm/redhat/Makefile.am

@@ -0,0 +1 @@
+EXTRA_DIST = spl.spec.in spl-kmod.spec.in spl-dkms.spec.in

rpm/redhat/spl-dkms.spec.in

@@ -0,0 +1 @@
+../generic/spl-dkms.spec.in

rpm/redhat/spl-kmod.spec.in

@@ -0,0 +1,104 @@
+%bcond_with     debug
+%bcond_with     debug_log
+%bcond_with     debug_kmem
+%bcond_with     debug_kmem_tracking
+%bcond_with     atomic_spinlocks
+
+Name:           @PACKAGE@-kmod
+Version:        @VERSION@
+Release:        @RELEASE@%{?dist}
+
+Summary:        Kernel module(s)
+Group:          System Environment/Kernel
+License:        GPLv2+
+URL:            http://zfsonlinux.org/
+BuildRequires:  %kernel_module_package_buildreqs
+Source0:        @PACKAGE@-%{version}.tar.gz
+BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+
+# Additional dependency information for the kmod sub-package must be specified
+# by generating a preamble text file which kmodtool can append to the spec file.
+%(/bin/echo -e "\
+Requires:       @PACKAGE@ = %{version}\n\
+Conflicts:      @PACKAGE@-dkms\n\n" > %{_sourcedir}/kmod-preamble)
+
+%description
+This package contains the kernel modules required to emulate
+several interfaces provided by the Solaris kernel.
+
+%define kmod_name spl
+%define debug_package %{nil}
+
+%kernel_module_package -n %{kmod_name} -p %{_sourcedir}/kmod-preamble
+
+%define ksrc %{_usrsrc}/kernels/%{kverrel}
+%define kobj %{ksrc}
+
+%package -n kmod-%{kmod_name}-devel
+Summary:        SPL kernel module(s) devel common
+Group:          System Environment/Kernel
+
+%description -n  kmod-%{kmod_name}-devel
+This package provides the header files and objects to build kernel modules
+which depend on the SPL kernel module.
+
+%prep
+if ! [ -d "%{ksrc}"  ]; then
+        echo "Kernel build directory isn't set properly, cannot continue"
+        exit 1
+fi
+
+%if %{with debug}
+%define debug --enable-debug
+%else
+%define debug --disable-debug
+%endif
+
+%if %{with debug_log}
+%define debug_log --enable-debug-log
+%else
+%define debug_log --disable-debug-log
+%endif
+
+%if %{with debug_kmem}
+%define debug_kmem --enable-debug-kmem
+%else
+%define debug_kmem --disable-debug-kmem
+%endif
+
+%if %{with debug_kmem_tracking}
+%define debug_kmem_tracking --enable-debug-kmem-tracking
+%else
+%define debug_kmem_tracking --disable-debug-kmem-tracking
+%endif
+
+%if %{with atomic_spinlocks}
+%define atomic_spinlocks --enable-atomic-spinlocks
+%else
+%define atomic_spinlocks --disable-atomic-spinlocks
+%endif
+
+%setup -n %{kmod_name}-%{version}
+%build
+%configure \
+        --with-config=kernel \
+        --with-linux=%{ksrc} \
+        --with-linux-obj=%{kobj} \
+        %{debug} \
+        %{debug_log} \
+        %{debug_kmem} \
+        %{debug_kmem_tracking} \
+        %{atomic_spinlocks}
+make %{?_smp_mflags}
+
+%install
+make install \
+        DESTDIR=${RPM_BUILD_ROOT} \
+        INSTALL_MOD_DIR=extra/%{kmod_name}
+%{__rm} -f %{buildroot}/lib/modules/%{kverrel}/modules.*
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files -n kmod-%{kmod_name}-devel
+%{_usrsrc}/%{kmod_name}-%{version}

rpm/redhat/spl.spec.in

@@ -0,0 +1 @@
+../generic/spl.spec.in