# Copyright (C) 2012 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.

# Udev rules for LVM.
#
# Scan all block devices having a PV label for LVM metadata.
# Store this information in LVMetaD (the LVM metadata daemon) and maintain LVM
# metadata state for improved performance by avoiding further scans while
# running subsequent LVM commands or while using lvm2app library.
# Also, notify LVMetaD about any relevant block device removal.
#
# This rule is essential for having the information in LVMetaD up-to-date.
# It also requires blkid to be called on block devices before so only devices
# used as LVM PVs are processed (ID_FS_TYPE="LVM2_member" or "LVM1_member").

SUBSYSTEM!="block", GOTO="lvm_end"
(LVM_EXEC_RULE)

# Only process devices already marked as a PV - this requires blkid to be called before.
ENV{ID_FS_TYPE}!="LVM2_member|LVM1_member", GOTO="lvm_end"

ACTION=="remove", GOTO="lvm_scan"
ACTION=="change", KERNEL=="md[0-9]*", GOTO="lvm_scan"

# If the PV is not a dm device, scan only after device addition (ADD event)
KERNEL!="dm-[0-9]*", ACTION!="add", GOTO="lvm_end"

# If the PV is a dm device, scan only after proper mapping activation (CHANGE event + DM_ACTIVATION=1)
# or after a coldplug (event retrigger) with "add" event (ADD event + DM_ACTIVATION=1)
KERNEL=="dm-[0-9]*", ENV{DM_ACTIVATION}!="1", GOTO="lvm_end"

LABEL="lvm_scan"
RUN+="(LVM_EXEC)/lvm pvscan --cache --activate ay --major $major --minor $minor"

LABEL="lvm_end"