# This file contains the rules needed to create persistent device names.

# forward scsi device events to the corresponding block device
ACTION=="change", SUBSYSTEM=="scsi", ENV{DEVTYPE}=="scsi_device", \
	TEST=="block",			ATTR{block/*/uevent}="change"

# we are only interested in add and change actions for block devices
ACTION!="add|change",			GOTO="persistent_storage_end"
SUBSYSTEM!="block",			GOTO="persistent_storage_end"

# and we can safely ignore these kinds of devices
KERNEL=="ram*|loop*|fd*|nbd*|gnbd*|dm-*|md*", GOTO="persistent_storage_end"

# skip removable ide devices, because open(2) on them causes an events loop
KERNEL=="hd*[!0-9]", ATTR{removable}=="1", DRIVERS=="ide-cs|ide-floppy", \
					GOTO="persistent_storage_end"
KERNEL=="hd*[0-9]", ATTRS{removable}=="1", \
					GOTO="persistent_storage_end"

# ignore partitions that span the entire disk
TEST=="whole_disk",			GOTO="persistent_storage_end"

# skip xen virtual hard disks
DRIVERS=="vbd",				GOTO="no_hardware_id"

# check these attributes of /sys/class/block nodes
ENV{DEVTYPE}!="?*", ATTR{range}=="?*",	ENV{DEVTYPE}="disk"
ENV{DEVTYPE}!="?*", ATTR{start}=="?*",	ENV{DEVTYPE}="partition"

# look for different kinds of unique identificators
KERNEL=="hd*[!0-9]", \
	IMPORT{program}="ata_id --export $tempnode"

KERNEL=="sd*[!0-9]|sr*",		ATTRS{ieee1394_id}=="?*", \
	ENV{ID_BUS}="ieee1394", ENV{ID_SERIAL}="$attr{ieee1394_id}"
KERNEL=="sd*[!0-9]|sr*",		ENV{ID_SERIAL}!="?*", \
	SUBSYSTEMS=="usb", \
	IMPORT{program}="usb_id --export $devpath"
KERNEL=="sd*[!0-9]|sr*",		ENV{ID_SERIAL}!="?*", \
	ENV{ID_BUS}="scsi", \
	IMPORT{program}="scsi_id --export --whitelisted --device=$tempnode"
KERNEL=="cciss?c[0-9]d[0-9]*",		ENV{ID_SERIAL}!="?*", \
	ENV{ID_BUS}="cciss", \
	IMPORT{program}="scsi_id --export --whitelisted --device=$tempnode"

KERNEL=="dasd*[!0-9]", \
	IMPORT{program}="dasd_id --export $tempnode"

KERNEL=="sd*[!0-9]|hd*[!0-9]", \
	IMPORT{program}="edd_id --export $tempnode"

KERNEL=="sd*[!0-9]|sr*",		ENV{ID_VENDOR}=="ATA", \
	PROGRAM="ata_id $tempnode", RESULT=="?*", ENV{ID_ATA_COMPAT}="$result"

# find the physical path of the device
ENV{DEVTYPE}=="disk",			IMPORT{program}="path_id $devpath"

LABEL="no_hardware_id"

# import the variables of partitions from the parent disks
ENV{DEVTYPE}=="partition",		IMPORT{parent}="ID_*"

# obsolete PATA driver
KERNEL=="hd*[!0-9]",			ENV{ID_SERIAL}=="?*", \
	SYMLINK+="disk/by-id/ata-$env{ID_MODEL}_$env{ID_SERIAL}"
KERNEL=="hd*[0-9]",			ENV{ID_SERIAL}=="?*", \
	SYMLINK+="disk/by-id/ata-$env{ID_MODEL}_$env{ID_SERIAL}-part%n"
# hd*-like compatibility links for libata and PATA devices
KERNEL=="sd*[!0-9]|sr*",		ENV{ID_ATA_COMPAT}=="?*", \
	SYMLINK+="disk/by-id/ata-$env{ID_ATA_COMPAT}"
KERNEL=="sd*[0-9]",			ENV{ID_ATA_COMPAT}=="?*", \
	SYMLINK+="disk/by-id/ata-$env{ID_ATA_COMPAT}-part%n"

KERNEL=="mmcblk[0-9]", ATTR{name}=="?*", ATTR{serial}=="?*", \
	ENV{ID_NAME}="$attr{name}", ENV{ID_SERIAL}="$attr{serial}", \
	SYMLINK+="disk/by-id/mmc-$env{ID_NAME}_$env{ID_SERIAL}"
KERNEL=="mmcblk[0-9]p[0-9]", ATTR{name}=="?*", ATTR{serial}=="?*", \
	ENV{ID_NAME}="$attr{name}", ENV{ID_SERIAL}="$attr{serial}", \
	SYMLINK+="disk/by-id/mmc-$env{ID_NAME}_$env{ID_SERIAL}-part%n"

ENV{DEVTYPE}=="disk",			ENV{ID_EDD}=="?*", \
	SYMLINK+="disk/by-id/edd-$env{ID_EDD}"
ENV{DEVTYPE}=="partition",		ENV{ID_EDD}=="?*", \
	SYMLINK+="disk/by-id/edd-$env{ID_EDD}-part%n"

KERNEL=="sd*[!0-9]|sr*|dasd[!0-9]*|cciss?c[0-9]d[0-9]*", ENV{ID_SERIAL}=="?*", \
	SYMLINK+="disk/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
KERNEL=="sd*[0-9]|dasd*[0-9]|cciss*p[0-9]*",		ENV{ID_SERIAL}=="?*", \
	SYMLINK+="disk/by-id/$env{ID_BUS}-$env{ID_SERIAL}-part%n"

ENV{DEVTYPE}=="disk",			ENV{ID_PATH}=="?*", \
	SYMLINK+="disk/by-path/$env{ID_PATH}"
ENV{DEVTYPE}=="partition",		ENV{ID_PATH}=="?*", \
	SYMLINK+="disk/by-path/$env{ID_PATH}-part%n"

# skip unpartitioned removable media devices from drivers which do not send
# "change" events
ENV{DEVTYPE}=="disk", KERNEL!="sd*|sr*", ATTR{removable}=="1", \
					GOTO="persistent_storage_end"

# UUID and volume label
IMPORT{program}="vol_id --export $tempnode"
ENV{ID_FS_UUID_ENC}=="?*",	ENV{ID_FS_USAGE}=="filesystem|other|crypto", \
	SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
ENV{ID_FS_LABEL_ENC}=="?*",	ENV{ID_FS_USAGE}=="filesystem|other", \
	SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"

LABEL="persistent_storage_end"