1 files changed, 54 insertions, 0 deletions
diff --git a/openpower/overlay/lib/udev/rules.d/11-dm-lvm.rules b/openpower/overlay/lib/udev/rules.d/11-dm-lvm.rules
new file mode 100644
index 00000000..16b80f9f
--- /dev/null
+++ b/openpower/overlay/lib/udev/rules.d/11-dm-lvm.rules
@@ -0,0 +1,54 @@
+# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
+#
+# This file is part of LVM2.
+
+# Udev rules for LVM.
+#
+# These rules create symlinks for LVM logical volumes in
+# /dev/VG directory (VG is an actual VG name). Some udev
+# environment variables are set (they can be used in later
+# rules as well):
+#   DM_LV_NAME - logical volume name
+#   DM_VG_NAME - volume group name
+#   DM_LV_LAYER - logical volume layer (blank if not set)
+
+# "add" event is processed on coldplug only!
+ACTION!="add|change", GOTO="lvm_end"
+ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="lvm_end"
+ENV{DM_UUID}!="LVM-?*", GOTO="lvm_end"
+
+# Use DM name and split it up into its VG/LV/layer constituents.
+IMPORT{program}="/usr/sbin/dmsetup splitname --nameprefixes --noheadings --rows $env{DM_NAME}"
+
+# DM_SUBSYSTEM_UDEV_FLAG0 is the 'NOSCAN' flag for LVM subsystem.
+# This flag is used to temporarily disable selected rules to prevent any
+# processing or scanning done on the LVM volume before LVM has any chance
+# to zero any stale metadata found within the LV data area. Such stale
+# metadata could cause false claim of the LV device, keeping it open etc.
+#
+# If the NOSCAN flag is present, backup selected existing flags used to
+# disable rules, then set them firmly so those selected rules are surely skipped.
+# Restore these flags once the NOSCAN flag is dropped (which is normally any
+# uevent that follows for this LV, even an artificially generated one).
+ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", ENV{DM_NOSCAN}="1", ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
+ENV{DM_SUBSYSTEM_UDEV_FLAG0}!="1", IMPORT{db}="DM_NOSCAN", IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
+ENV{DM_SUBSYSTEM_UDEV_FLAG0}!="1", ENV{DM_NOSCAN}=="1", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}", \
+				   ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="", ENV{DM_NOSCAN}=""
+
+ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}=="1", GOTO="lvm_end"
+
+OPTIONS+="event_timeout=180"
+
+# Do not create symlinks for inappropriate subdevices.
+ENV{DM_LV_NAME}=="pvmove?*|?*_vorigin", GOTO="lvm_disable"
+ENV{DM_LV_LAYER}=="?*", GOTO="lvm_disable"
+
+# Create symlinks for top-level devices only.
+ENV{DM_VG_NAME}=="?*", ENV{DM_LV_NAME}=="?*", SYMLINK+="$env{DM_VG_NAME}/$env{DM_LV_NAME}", GOTO="lvm_end"
+
+LABEL="lvm_disable"
+ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="1"
+ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
+OPTIONS:="nowatch"
+
+LABEL="lvm_end"