58-xapi.rules

# Quickly skip stuff we don't care about at all:

# Skip block devices - no networks in here
SUBSYSTEM!="block", GOTO="end_xapi"

ACTION=="add|change", KERNEL=="xvd*|td*|nbd*", GOTO="ignore_device"

# srX are not partitions, go check if it's a cdrom. handle remove specially.
ACTION=="remove", KERNEL=="sr[0-9]", GOTO="usb_symlink"
KERNEL=="sr[0-9]", GOTO="maybe_cdrom"

# Skip partitions - whole disks only please
KERNEL=="*[0-9]", GOTO="end_xapi"

# Split on device type: ##############################################################
LABEL="maybe_cdrom"

# Is it a CDROM?
PROGRAM=="/bin/grep '^drive name:.*\W%k\(\W\|$$\)' /proc/sys/dev/cdrom/info", GOTO="usb_cdrom_symlink"
# Is it USB?
SUBSYSTEMS=="usb", GOTO="usb_symlink"
# If neither of those, ignore
GOTO="end_xapi"

# Handle all CDROM devices here: #####################################################
LABEL="usb_cdrom_symlink"

# For CDs, create a symlink and start the corresponding cdrommon service
# This is done on the "change" action as well as "add" because devices that exist from
# boot are only triggered with the "change" action.
ACTION=="add|change", SYMLINK+="xapi/cd/%k"
ACTION=="add|change", TAG+="systemd", ENV{SYSTEMD_WANTS}+="cdrommon@$name.service"

ACTION=="add", RUN+="/bin/sh -c '/opt/xensource/libexec/local-device-change %k 2>&1 >/dev/null&'"
ACTION=="remove", RUN+="/bin/sh -c '/opt/xensource/libexec/local-device-change %k 2>&1 >/dev/null&'"

GOTO="end_xapi"

# Handle all non-CDROM USB devices here: #############################################
LABEL="usb_symlink"

# Skip devices which fail the local sharing check (to filter out root/mounted devices)
ACTION=="add", PROGRAM!="/opt/xensource/libexec/check-device-sharing %k", GOTO="end_xapi"

ACTION=="add|change", SYMLINK+="xapi/block/%k"

ACTION=="add", RUN+="/bin/sh -c '/opt/xensource/libexec/local-device-change %k 2>&1 >/dev/null&'"
ACTION=="remove", RUN+="/bin/sh -c '/opt/xensource/libexec/local-device-change %k 2>&1 >/dev/null&'"

GOTO="end_xapi"

# Handle VDIs plugged into Dom0 here: #############################################
LABEL="ignore_device"

# Do not let udev access them: it would prevent unplugging during VDI import
# To avoid patching other udev rule files we set env vars to skip processing rules

# from dm_disable in 10-dm.rules
# will also disable 65-md-incremental.rules processing
ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="1"
ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="1"
ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
OPTIONS:="nowatch"

# prevent 60-persistent-storage.rules processing
# depends on backported env flag in systemd
ENV{UDEV_DISABLE_PERSISTENT_STORAGE_RULES_FLAG}="1"

# prevent 62-multipath.rules processing
ENV{nompath}="1"

GOTO="end_xapi"

######################################################################################

LABEL="end_xapi"