add dkms-etercifs subpackage

etercifs.spec

 # Etersoft (c) 2007-2017
 # Multiplatform spec for Korinf autobuild system (ALT Linux package spec policy)
 
+%define modname etercifs
+
 Name: etercifs
 Version: 5.4.18
 Release: alt1
@@ -51,6 +53,26 @@ VFS). With the addition of upcoming improvements to the mount helper
 (mount.cifs) the CIFS VFS will be able to take advantage of the new CIFS
 URL specification though.
 
+%if %_vendor != "alt"
+%package -n dkms-etercifs
+Summary: DKMS-ready CIFS Linux kernel module with Etersoft extensions
+Group: System/Kernel and hardware
+Requires(preun): dkms
+Requires(post): dkms
+
+Requires: etercifs = %version-%release
+
+Buildarch: noarch
+
+%description -n dkms-etercifs
+The CIFS VFS is a virtual file system for Linux to allow access to
+servers and storage appliances compliant with the SNIA CIFS
+Specification version 1.0 or later.
+
+This package contains DKMS-ready CIFS Linux kernel module with Etersoft
+extensions.
+%endif
+
 %prep
 %setup
 
@@ -106,6 +128,35 @@ cp %SOURCE1 %buildroot%_datadir/%name/
 mkdir -p %buildroot%_bindir
 install -m755 etermount %buildroot%_bindir/
 
+%if %_vendor != "alt"
+# dkms part
+mkdir -p %buildroot%_usrsrc/%modname-%version/
+cat > %buildroot%_usrsrc/%modname-%version/dkms.conf <<EOF
+# DKMS file for Linux CIFS with Etersoft's extensions
+
+PACKAGE_NAME="%modname"
+PACKAGE_VERSION="%version"
+
+BUILT_MODULE_NAME[0]="etercifs"
+DEST_MODULE_LOCATION[0]="/kernel/fs/cifs/"
+REMAKE_INITRD="no"
+AUTOINSTALL="YES"
+EOF
+
+%post -n dkms-etercifs
+if [ "$1" == 1 ]
+then
+  dkms add -m %modname -v %version --rpm_safe_upgrade
+fi
+%_initdir/%modname build
+
+%preun -n dkms-etercifs
+if [ "$1" == 0 ]
+then
+  dkms remove -m %modname -v %version --rpm_safe_upgrade --all
+fi
+%endif
+
 %post
 %post_service %name
 
@@ -122,6 +173,11 @@ install -m755 etermount %buildroot%_bindir/
 %config %_sysconfdir/modprobe.d/etersoft.conf
 %_datadir/%name/
 
+%if %_vendor != "alt"
+%files -n dkms-etercifs
+%_usrsrc/%modname-%version/dkms.conf
+%endif
+
 %changelog
 
 * Fri Mar 03 2017 Konstantin Artyushkin <akv@altlinux.org> 5.4.18-alt1