Support building a zfs-modules-dkms sub package

This commit adds support for building a zfs-modules-dkms sub package
built around Dynamic Kernel Module Support. This is to allow building
packages using the DKMS infrastructure which is intended to ease the
burden of kernel version changes, upgrades, etc.

By default zfs-modules-dkms-* sub package will be built as part of
the 'make rpm' target.  Alternately, you can build only the DKMS
module package using the 'make rpm-dkms' target.

Examples:

    # To build packaged binaries as well as a dkms packages
    $ ./configure && make rpm

    # To build only the packaged binary utilities and dkms packages
    $ ./configure && make rpm-utils rpm-dkms

Note: Only the RHEL 5/6, CHAOS 5, and Fedora distributions are
      supported for building the dkms sub package.

Signed-off-by: Prakash Surya <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #535

1 files changed, 108 insertions, 0 deletions

diff --git a/zfs-modules.spec.in b/zfs-modules.spec.in
index 5aea11a50..057da20be 100644
--- a/zfs-modules.spec.in
+++ b/zfs-modules.spec.in
@@ -44,6 +44,17 @@
  %endif
 %endif
 
+# Set using 'rpmbuild ... --with kernel-dkms ...', defaults to disabled.
+%if %{defined _with_kernel_dkms}
+ %define with_kernel_dkms 1
+%else
+ %if %{defined _without_kernel_dkms}
+  %define with_kernel_dkms 0
+ %else
+  %define with_kernel_dkms 0
+ %endif
+%endif
+
 # Set using 'rpmbuild ... --with debug ...', defaults to disabled.
 %if %{defined _with_debug}
  %define kdebug --enable-debug
@@ -96,12 +107,15 @@
 
  %define kpkg_kern       kernel-%{kverextra}
  %define kpkg_dbug       %{nil}
+ %define kpkg_dkms       dkms
 
  %define kdevpkg_kern    kernel-source
  %define kdevpkg_dbug    %{nil}
+ %define kdevpkg_dkms    dkms
 
  %define kverpkg_kern    %(echo %{kver_kern} | %{__sed} -e 's/-%{kverextra}//g')
  %define kverpkg_dbug    %{nil}
+ %define kverpkg_dkms    2.2.0.2
 
  # The kernel and rpm versions do not strictly match under SLES11
  # e.g. kernel version 2.6.27.19-5 != rpm version 2.6.27.19-5.1
@@ -143,10 +157,13 @@
 
  %define kpkg_kern       kernel
  %define kpkg_dbug       kernel-debug
+ %define kpkg_dkms       dkms
 
  %define kdevpkg_kern    kernel-devel
  %define kdevpkg_dbug    kernel-debug-devel
+ %define kdevpkg_dkms    dkms
 
+ %define kverpkg_dkms    2.2.0.2
  %if %{defined el6} || %{defined ch5}
   %define kverpkg_kern   %(echo %{kver_kern} | %{__sed} -e 's/.%{_target_cpu}//g')
   %define kverpkg_dbug   %(echo %{kver_dbug} | %{__sed} -e 's/.%{_target_cpu}//g' | %{__sed} -e 's/.debug//g')
@@ -194,10 +211,13 @@
 
  %define kpkg_kern       kernel
  %define kpkg_dbug       kernel-debug
+ %define kpkg_dkms       dkms
 
  %define kdevpkg_kern    kernel-devel
  %define kdevpkg_dbug    kernel-debug-devel
+ %define kdevpkg_dkms    dkms
 
+ %define kverpkg_dkms    2.2.0.2
  %define kverpkg_kern    %(echo %{kver_kern} | %{__sed} -e 's/.%{_target_cpu}//g')
  %define kverpkg_dbug    %(echo %{kver_dbug} | %{__sed} -e 's/.%{_target_cpu}//g' | %{__sed} -e 's/.debug//g')
 
@@ -231,6 +251,7 @@
 
  %define kverpkg_kern    %{kver_kern}
  %define kverpkg_dbug    %{nil}
+ %define kverpkg_dkms    %{nil}
 
  %if %{undefined kdir}
   %define kdir_kern      /lib/modules/%{kver_kern}/build
@@ -274,39 +295,50 @@
 %if %{undefined splver}
  %define spllnk_kern     %{_usrsrc}/spl-*/%{kver_kern}
  %define spllnk_dbug     %{_usrsrc}/spl-*/%{kver_dbug}
+ %define spllnk_dkms     %{_var}/lib/dkms/spl/*/build
 
  %define splver_kern     %((echo X; %{__cat} %{spllnk_kern}/spl.release
                             2>/dev/null) | tail -1)
  %define splver_dbug     %((echo X; %{__cat} %{spllnk_dbug}/spl.release
                             2>/dev/null) | tail -1)
+ %define splver_dkms     %((echo X; %{__cat} %{spllnk_dkms}/spl.release
+                            2>/dev/null) | tail -1)
 %else
  %define splver_kern     %{splver}
  %define splver_dbug     %{splver}
+ %define splver_dksm     %{splver}
 %endif
 
 %define splpkg_kern      spl-modules
 %define splpkg_dbug      spl-modules-debug
+%define splpkg_dkms      spl-modules-dkms
 
 %define spldevpkg_kern   spl-modules-devel
 %define spldevpkg_dbug   spl-modules-debug-devel
+%define spldevpkg_dkms   spl-modules-dkms
 
 %define splverpkg_kern   %{splver_kern}
 %define splverpkg_dbug   %{splver_dbug}
+%define splverpkg_dkms   %{splver_dkms}
 
 %if %{undefined spldir}
  %define spldir_kern     %{_usrsrc}/spl-%{splver_kern}/%{kver_kern}
  %define spldir_dbug     %{_usrsrc}/spl-%{splver_dbug}/%{kver_dbug}
+ %define spldir_dkms     %{_usrsrc}/spl-%{splver_dkms}
 %else
  %define spldir_kern     %{spldir}
  %define spldir_dbug     %{spldir}.debug
+ %define spldir_dkms     %{spldir}
 %endif
 
 %if %{undefined splobj}
  %define splobj_kern     %{spldir_kern}
  %define splobj_dbug     %{spldir_dbug}
+ %define splobj_dkms     %{spldir_dkms}
 %else
  %define splobj_kern     %{splobj}
  %define splobj_dbug     %{splobj}.debug
+ %define splobj_dkms     %{splobj}
 %endif
 
 
@@ -322,6 +354,7 @@
 
 %define rel_kern         @ZFS_META_RELEASE@
 %define rel_dbug         @ZFS_META_RELEASE@
+%define rel_dkms         @ZFS_META_RELEASE@
 
 %if %{defined kpkg_kern}
 %define req_kern         %{kpkg_kern}
@@ -329,12 +362,17 @@
 %if %{defined kpkg_dbug}
 %define req_dbug         %{kpkg_dbug}
 %endif
+%if %{defined kpkg_dkms}
+%define req_dkms         %{kpkg_dkms}
+%endif
 
 %define splreq_kern      %{splpkg_kern}
 %define splreq_dbug      %{splpkg_dbug}
+%define splreq_dkms      %{splpkg_dkms}
 
 %define spldevreq_kern   %{spldevpkg_kern}
 %define spldevreq_dbug   %{spldevpkg_dbug}
+%define spldevreq_dkms   %{spldevpkg_dkms}
 
 %else
 
@@ -342,6 +380,7 @@
 %define relext_dbug      %(echo %{kverpkg_dbug} | %{__sed} -e 's/-/_/g')
 %define rel_kern         @ZFS_META_RELEASE@_%{relext_kern}
 %define rel_dbug         @ZFS_META_RELEASE@_%{relext_dbug}
+%define rel_dkms         @ZFS_META_RELEASE@
 
 %if %{defined kpkg_kern}
 %define req_kern         %{kpkg_kern} %{koppkg} %{kverpkg_kern}
@@ -349,12 +388,17 @@
 %if %{defined kpkg_dbug}
 %define req_dbug         %{kpkg_dbug} %{koppkg} %{kverpkg_dbug}
 %endif
+%if %{defined kpkg_dkms}
+%define req_dkms         %{kpkg_dkms} >= %{kverpkg_dkms}
+%endif
 
 %define splreq_kern      %{splpkg_kern} = %{splverpkg_kern}_%{relext_kern}
 %define splreq_dbug      %{splpkg_dbug} = %{splverpkg_dbug}_%{relext_dbug}
+%define splreq_dkms      %{splpkg_dkms} = %{splverpkg_dkms}
 
 %define spldevreq_kern   %{spldevpkg_kern} = %{splverpkg_kern}_%{relext_kern}
 %define spldevreq_dbug   %{spldevpkg_dbug} = %{splverpkg_dbug}_%{relext_dbug}
+%define spldevreq_dkms   %{spldevpkg_dkms} = %{splverpkg_dkms}
 
 %endif
 
@@ -462,6 +506,34 @@ and Module.symvers symbols needed for building additional modules
 which use %{name}.
 
 %endif
+%if %{?with_kernel_dkms}
+
+%package dkms
+Summary:         ZFS File System (DKMS)
+Group:           Utilities/System
+Release:         %{rel_dkms}
+Provides:        %{name}
+BuildArch:       noarch
+%if %{defined req_dkms}
+Requires:        %{req_dkms}
+%endif
+%if %{defined kdevpkg_dkms}
+BuildRequires:   %{kdevpkg_dkms}
+%endif
+%if %{defined splreq_dkms}
+Requires:        %{splreq_dkms}
+%endif
+%if %{defined spldevpkg_dkms}
+BuildRequires:   %{spldevpkg_dkms}
+%endif
+Provides:        lustre-backend-fs
+
+%description dkms
+The %{name}-dkms package contains the necessary pieces to build and
+install the ZFS kernel modules with Dynamic Kernel Modules Support
+(DKMS).
+
+%endif
 
 %prep
 %setup -n @PACKAGE@-%{version}
@@ -486,6 +558,15 @@ make
 make DESTDIR=$RPM_BUILD_ROOT install
 
 %endif
+%if %{?with_kernel_dkms}
+
+%configure %{kdebug} %{kdebug_dmu_tx}
+make dist
+mkdir -p $RPM_BUILD_ROOT/%{_prefix}/src
+tar -xf @PACKAGE@-%{version}.tar.gz -C $RPM_BUILD_ROOT/%{_prefix}/src
+cp -af dkms.conf $RPM_BUILD_ROOT/%{_prefix}/src/@PACKAGE@-%{version}
+
+%endif
 
 %clean
 rm -rf $RPM_BUILD_ROOT
@@ -540,3 +621,30 @@ else
 fi
 
 %endif
+%if %{?with_kernel_dkms}
+
+%files dkms
+%defattr(-,root,root)
+%{_prefix}/src/@PACKAGE@-%{version}/*
+
+%post dkms
+for POSTINST in %{_prefix}/lib/dkms/common.postinst; do
+	if [ -f $POSTINST ]; then
+		$POSTINST @PACKAGE@ %{version}
+		exit $?
+	fi
+	echo "WARNING: $POSTINST does not exist."
+done
+echo -e "ERROR: DKMS version is too old and @PACKAGE@ was not"
+echo -e "built with legacy DKMS support."
+echo -e "You must either rebuild @PACKAGE@ with legacy postinst"
+echo -e "support or upgrade DKMS to a more current version."
+exit 1
+
+%preun dkms
+echo -e
+echo -e "Uninstall of @PACKAGE@ module (version %{version}) beginning:"
+dkms remove -m @PACKAGE@ -v %{version} --all --rpm_safe_upgrade
+exit 0
+
+%endif