From 9e5844fda2400b5668188baf0ae3b7a68bb176b5 Mon Sep 17 00:00:00 2001
From: Travis Kemen <thepeople@openwrt.org>
Date: Fri, 12 Feb 2010 01:37:02 +0000
Subject: [PATCH] Here is LVM support for OpenWRT. It introduces 3 new
 packages: - kmod-dm for the device mapper kernel module. - kmod-libdevmapper
 for the device-mapper library. - kmod-lvm2 for the lvm tool. Note that it
 currently does not create the symlinks for all the lvm tools, so you have to
 use lvm pvs rather than just pvs. Thanks Stefan Monnier

SVN-Revision: 19595
---
 .../files/etc/hotplug2-common.rules           |  6 ++++
 package/kernel/modules/block.mk               | 29 +++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/package/base-files/files/etc/hotplug2-common.rules b/package/base-files/files/etc/hotplug2-common.rules
index d6dd6e8a9b3..a7aba35a931 100644
--- a/package/base-files/files/etc/hotplug2-common.rules
+++ b/package/base-files/files/etc/hotplug2-common.rules
@@ -34,6 +34,12 @@ DEVPATH is set, SUBSYSTEM ~~ (input) {
 	makedev /dev/input/%DEVICENAME% 0644
 }
 
+DEVICENAME == device-mapper {
+       nothrottle
+       makedev /dev/mapper/control 0600
+}
+
+
 DEVPATH is set {
 	nothrottle
 	makedev /dev/%DEVICENAME% 0644
diff --git a/package/kernel/modules/block.mk b/package/kernel/modules/block.mk
index b1804337cdf..34c6f992764 100644
--- a/package/kernel/modules/block.mk
+++ b/package/kernel/modules/block.mk
@@ -360,6 +360,35 @@ endef
 $(eval $(call KernelPackage,nbd))
 
 
+define KernelPackage/dm
+  SUBMENU:=$(BLOCK_MENU)
+  TITLE:=Device Mapper
+  # All the "=n" are unnecessary, they're only there
+  # to stop the config from asking the question.
+  # MIRROR is M because I've needed it for pvmove.
+  KCONFIG:= \
+       CONFIG_BLK_DEV_MD=n \
+       CONFIG_DM_DEBUG=n \
+       CONFIG_DM_CRYPT=n \
+       CONFIG_DM_UEVENT=n \
+       CONFIG_DM_DELAY=n \
+       CONFIG_DM_MULTIPATH=n \
+       CONFIG_DM_ZERO=n \
+       CONFIG_DM_SNAPSHOT=n \
+       CONFIG_MD=y \
+       CONFIG_BLK_DEV_DM \
+       CONFIG_DM_MIRROR
+  FILES:=$(LINUX_DIR)/drivers/md/dm-*.$(LINUX_KMOD_SUFFIX)
+  AUTOLOAD:=$(call AutoLoad,30,dm-mod dm-region-hash dm-mirror dm-log)
+endef
+
+define KernelPackage/dm/description
+ Kernel module necessary for LVM2 support
+endef
+
+$(eval $(call KernelPackage,dm))
+
+
 define KernelPackage/pata-rb153-cf
 $(call KernelPackage/ata/Depends,@TARGET_adm5120_router_le)
   TITLE:=RouterBOARD 153 CF Slot support