[Buildroot] [PATCH] package/lvm2: lvmetad systemd integration

[Pascal de Bruijn]

lvmetad is usually combined with event-based system services that
automatically run pvscan --cache on disks added or removed.  This
way, the cache is automatically updated with metadata from new disks
when they appear.  LVM udev rules and systemd services implement this
automation.  Automatic scanning is usually combined with automatic
activation.  For more information, see pvscan(8).

Signed-off-by: Pascal de Bruijn <p.debruijn at unilogic.nl>
---
 package/lvm2/Config.in | 3 +++
 package/lvm2/lvm2.mk   | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/package/lvm2/Config.in b/package/lvm2/Config.in
index de5b972..a828c31 100644
--- a/package/lvm2/Config.in
+++ b/package/lvm2/Config.in
@@ -44,6 +44,9 @@ config BR2_PACKAGE_LVM2_APP_LIBRARY
 	help
 	  Install application library (liblvm2app).
 
+	  Enable this if you need systemd integration,
+	  like automatic activation of LVM logical volumes.
+
 comment "lvm2 application library needs a glibc or uClibc toolchain"
 	depends on BR2_TOOLCHAIN_USES_MUSL
 
diff --git a/package/lvm2/lvm2.mk b/package/lvm2/lvm2.mk
index 3da713f..5cf6d93 100644
--- a/package/lvm2/lvm2.mk
+++ b/package/lvm2/lvm2.mk
@@ -54,6 +54,12 @@ else
 LVM2_CONF_OPTS += --disable-applib
 endif
 
+ifeq ($(BR2_PACKAGE_LVM2_APP_LIBRARY)$(BR2_PACKAGE_SYSTEMD),yy)
+LVM2_DEPENDENCIES += systemd
+LVM2_CONF_OPTS += --enable-lvmetad
+LVM2_INSTALL_TARGET_OPTS = DESTDIR=$(TARGET_DIR) install install_systemd_units install_systemd_generators
+endif
+
 ifeq ($(BR2_TOOLCHAIN_SUPPORTS_PIE),)
 LVM2_CONF_ENV += ac_cv_flag_HAVE_PIE=no
 endif
-- 
2.7.4