ixgbe: Support packaging for DKMS on RHEL/CentOS based systems

To allow easy deployment of out of tree module pack it's source code and
configuration for DKMS on RHEL/CentOS using RPM.

Building package for future deployment on target system is done using
rpmbuild(8) tool:

  $ cd ixgbe/
  $ rpmbuild -ba rpm/ixgbe-dkms.spec
  ...
  $ cd ..
  $ ls -1 noarch/ixgbe[_-]*.rpm ixgbe[_-]*.rpm
  ixgbe-dkms-5.19.9-1.src.rpm
  noarch/ixgbe-dkms-5.19.9-1.noarch.rpm

Now on target system install above package and it's dependencies:

  # yum install -y dkms kernel kernel-headers
  # rpm -ivh ixgbe-dkms-5.19.9-1.noarch.rpm

Note that kernel-headers package(s) should be installed for all kernel
packages you want to build this module.

Verify installation by checking output from rpm(1) and modinfo(8):

  # modinfo ixgbe -k <kernel_version_to_check> | head -n10

For example:

  # modinfo ixgbe -k $(uname -r) | head -n10
  filename:       /lib/modules/3.10.0-1160.108.1.el7.x86_64/extra/ixgbe.ko.xz
  version:        5.19.9
                  ^^^^^^
  ...

module version should match to ixgbe-dkms package version.

Signed-off-by: Serhey Popovych <[email protected]>

rpm/ixgbe-dkms.spec

@@ -0,0 +1,102 @@
+%define module_name ixgbe
+%define module_version 5.19.9
+
+%define _srcdir %{_prefix}/src/%{module_name}-%{module_version}
+%define _dkmsdir %{_prefix}/lib/dkms
+
+%define _topdir %(pwd)
+%define _specdir %{_topdir}
+%define _sourcedir %{_topdir}
+%define _buildrootdir %{_topdir}
+%define _builddir %{_topdir}
+%define _rpmdir %{_topdir}/..
+%define _srcrpmdir %{_topdir}/..
+
+%define __find_provides  %{_dkmsdir}/find-provides
+
+Summary:	DKMS source for Intel 10GbE Ethernet Controller out of tree driver
+Name:		%{module_name}-dkms
+Version:	%{module_version}
+License:	GPLv2
+Packager:	Serhey Popovych <[email protected]>
+Release:	1%{?dist}
+BuildArch:	noarch
+Group:		System/Kernel
+Requires:	dkms >= 1.95
+BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root/
+
+%description
+This is Intel 10GbE Ethernet Controller out of tree ixgbe driver.
+
+Installation of the ixgbe-dkms package will disable the in-kernel ixgbe
+module. To re-enable them, the ixgbe-dkms package must be purged.
+
+This package provides the dkms source code for the ixgbe kernel module.
+Kernel source or headers are required to compile these modules.
+
+%prep
+if [ "$RPM_BUILD_ROOT" != "/" ]; then
+	rm -rf $RPM_BUILD_ROOT
+fi
+
+%install
+mkdir -p $RPM_BUILD_ROOT/%{_srcdir}
+mkdir -p $RPM_BUILD_ROOT/%{_datadir}/%{name}
+mkdir -p $RPM_BUILD_ROOT/%{_sysconfdir}/depmod.d
+mkdir -p $RPM_BUILD_ROOT/%{_sysconfdir}/modprobe.d
+
+for f in %{_sourcedir}/src/*; do
+	install -m 644 ${f} $RPM_BUILD_ROOT/%{_srcdir}/
+done
+
+sed -e "s|updates/dkms|extra|g" \
+    -e "s|#MODULE_NAME#|%{module_name}|g" \
+    -e "s|#MODULE_VERSION#|%{module_version}|g" \
+    %{_sourcedir}/dkms/conf > $RPM_BUILD_ROOT/%{_srcdir}/dkms.conf
+
+sed -e "s|updates/dkms|extra|g" \
+    %{_sourcedir}/dkms/depmod > $RPM_BUILD_ROOT/%{_sysconfdir}/depmod.d/%{name}.conf
+
+sed -e "s|updates/dkms|extra|g" \
+    %{_sourcedir}/dkms/modprobe > $RPM_BUILD_ROOT/%{_sysconfdir}/modprobe.d/%{name}.conf
+
+if [ -f %{_sourcedir}/common.postinst ]; then
+	install -m 755 %{_sourcedir}/common.postinst $RPM_BUILD_ROOT/%{_datadir}/%{name}/postinst
+fi
+
+%clean
+if [ "$RPM_BUILD_ROOT" != "/" ]; then
+	rm -rf $RPM_BUILD_ROOT
+fi
+
+%post
+for POSTINST in %{_dkmsdir}/common.postinst %{_datadir}/%{name}/postinst; do
+	if [ -f $POSTINST ]; then
+		$POSTINST %{module_name} %{module_version} %{_datadir}/%{name}
+		exit $?
+	fi
+	echo "WARNING: $POSTINST does not exist."
+done
+echo -e "ERROR: DKMS version is too old and %{name} was not"
+echo -e "built with legacy DKMS support."
+echo -e "You must either rebuild %{name} with legacy postinst"
+echo -e "support or upgrade DKMS to a more current version."
+exit 1
+
+%preun
+echo -e
+echo -e "Uninstall of %{module_name} module (version %{module_version}) beginning:"
+dkms remove -m %{module_name} -v %{module_version} --all --rpm_safe_upgrade
+exit 0
+
+%files
+%defattr(-,root,root)
+%config(noreplace) %{_sysconfdir}/depmod.d/%{name}.conf
+%config(noreplace) %{_sysconfdir}/modprobe.d/%{name}.conf
+%{_srcdir}
+%{_datadir}/%{name}
+%doc README
+
+%changelog
+* %(date "+%a %b %d %Y") %{packager} %{version}-%{release}
+- Initial release. (Closes: #123456)