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File Content: `56-dm-mpath.rules`

ACTION!="add|change", GOTO="mpath_end"
ENV{DM_UDEV_RULES}!="?*", GOTO="mpath_end"
ENV{DM_UUID}!="mpath-?*", GOTO="mpath_end"

IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
IMPORT{db}="MPATH_DEVICE_READY"

# If this uevent didn't come from dm, don't try to update the
# device state
ENV{DM_COOKIE}!="?*", ENV{DM_ACTION}!="PATH_*", IMPORT{db}="DM_UDEV_DISABLE_OTHER_RULES_FLAG", IMPORT{db}="DM_NOSCAN", GOTO="scan_import"

ENV{.MPATH_DEVICE_READY_OLD}="$env{MPATH_DEVICE_READY}"

# multipath sets DM_SUBSYSTEM_UDEV_FLAG2 when it reloads a
# table with no active devices. If this happens, mark the
# device not ready
ENV{DM_SUBSYSTEM_UDEV_FLAG2}=="1", ENV{MPATH_DEVICE_READY}="0",\
	GOTO="mpath_action"

# If the last path has failed mark the device not ready
# Note that DM_NR_VALID_PATHS is only set for PATH_FAILED|PATH_REINSTATED
# events.
# This may not be reliable, as events aren't necessarily received in order.
ENV{DM_NR_VALID_PATHS}=="0", ENV{MPATH_DEVICE_READY}="0", GOTO="mpath_action"

ENV{MPATH_SBIN_PATH}="/sbin"
TEST!="$env{MPATH_SBIN_PATH}/multipath", ENV{MPATH_SBIN_PATH}="/usr/sbin"

# Don't run multipath -U during "coldplug" after switching root,
# because paths are just being added to the udev db.
ACTION=="add", ENV{.MPATH_DEVICE_READY_OLD}=="1", GOTO="paths_ok"

# Check the map state directly with multipath -U.
# This doesn't attempt I/O on the device.
PROGRAM=="$env{MPATH_SBIN_PATH}/multipath -U -v1 %k", GOTO="paths_ok"
ENV{MPATH_DEVICE_READY}="0", GOTO="mpath_action"
LABEL="paths_ok"

# Don't mark a device ready on a PATH_FAILED event. even if
# DM_NR_VALID_PATHS is greater than 0. Just keep the existing
# value
ENV{DM_ACTION}=="PATH_FAILED", GOTO="mpath_action"

# This event is either a PATH_REINSTATED or a table reload where
# there are active paths. Mark the device ready
ENV{MPATH_DEVICE_READY}="1"

LABEL="mpath_action"
# DM_SUBSYSTEM_UDEV_FLAG0 is the "RELOAD" flag for multipath subsystem.
# Drop the DM_ACTIVATION flag here as mpath reloads tables if any of its
# paths are lost/recovered. For any stack above the mpath device, this is not
# something that should be reacted upon since it would be useless extra work.
# It's exactly mpath's job to provide *seamless* device access to any of the
# paths that are available underneath.
ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", \
	ENV{DM_ACTIVATION}="0", ENV{MPATH_UNCHANGED}="1"

# For path failed or reinstated events, unset DM_ACTIVATION.
# This is similar to the DM_SUBSYSTEM_UDEV_FLAG0 case above.
ENV{DM_ACTION}=="PATH_FAILED|PATH_REINSTATED", \
	ENV{DM_ACTIVATION}="0", ENV{MPATH_UNCHANGED}="1"

# Do not initiate scanning if no path is available,
# otherwise there would be a hang or IO error on access.
# We'd like to avoid this, especially within udev processing.
ENV{MPATH_DEVICE_READY}=="0", ENV{DM_NOSCAN}="1"

# Also skip all foreign rules if no path is available.
# Remember the original value of DM_DISABLE_OTHER_RULES_FLAG
# and restore it back once we have at least one path available.
ENV{MPATH_DEVICE_READY}=="0", ENV{.MPATH_DEVICE_READY_OLD}=="1",\
	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}=="",\
	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}"
ENV{MPATH_DEVICE_READY}=="0", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
ENV{MPATH_DEVICE_READY}!="0", ENV{.MPATH_DEVICE_READY_OLD}=="0",\
	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}",\
	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="",\
	ENV{DM_ACTIVATION}="1", ENV{MPATH_UNCHANGED}="0"

# The code to check multipath state ends here. We need to set
# properties and symlinks regardless whether the map is usable or
# not. If symlinks get lost, systemd may auto-unmount file systems.

LABEL="scan_import"
ENV{DM_NOSCAN}!="1", GOTO="import_end"
IMPORT{db}="ID_FS_TYPE"
IMPORT{db}="ID_FS_USAGE"
IMPORT{db}="ID_FS_UUID"
IMPORT{db}="ID_FS_UUID_ENC"
IMPORT{db}="ID_FS_LABEL"
IMPORT{db}="ID_FS_LABEL_ENC"
IMPORT{db}="ID_FS_VERSION"

LABEL="import_end"

# Multipath maps should take precedence over their members.
ENV{DM_UDEV_LOW_PRIORITY_FLAG}!="1", OPTIONS+="link_priority=50"

# Set some additional symlinks that typically exist for mpath
# path members, too, and should be overridden.

# kpartx_id is very robust, it works for suspended maps and maps
# with 0 dependencies. It sets DM_TYPE, DM_PART, DM_WWN
TEST=="/lib/udev/kpartx_id", \
	IMPORT{program}=="kpartx_id %M %m $env{DM_UUID}"

ENV{DM_TYPE}=="?*", ENV{DM_SERIAL}=="?*", \
	SYMLINK+="disk/by-id/$env{DM_TYPE}-$env{DM_SERIAL}"
ENV{DM_WWN}=="?*", SYMLINK+="disk/by-id/wwn-$env{DM_WWN}"

LABEL="mpath_end"

Name	Size	Permission
01-md-raid-creating.rules	321 bytes	0644
40-usb_modeswitch.rules	42861 bytes	0644
40-vm-hotadd.rules	655 bytes	0644
50-apport.rules	165 bytes	0644
50-firmware.rules	210 bytes	0644
50-udev-default.rules	4846 bytes	0644
55-dm.rules	7274 bytes	0644
55-scsi-sg3_id.rules	6664 bytes	0644
56-dm-mpath.rules	4560 bytes	0644
56-dm-parts.rules	1442 bytes	0644
56-lvm.rules	2420 bytes	0644
58-scsi-sg3_symlink.rules	2863 bytes	0644
60-autosuspend.rules	419 bytes	0644
60-block.rules	703 bytes	0644
60-cdrom_id.rules	1071 bytes	0644
60-drm.rules	413 bytes	0644
60-evdev.rules	990 bytes	0644
60-fido-id.rules	491 bytes	0644
60-input-id.rules	282 bytes	0644
60-multipath.rules	3863 bytes	0644
60-open-vm-tools.rules	250 bytes	0644
60-persistent-alsa.rules	616 bytes	0644
60-persistent-input.rules	2719 bytes	0644
60-persistent-storage-dm.rules	1794 bytes	0644
60-persistent-storage-tape.rules	2135 bytes	0644
60-persistent-storage.rules	9145 bytes	0644
60-persistent-v4l.rules	769 bytes	0644
60-sensor.rules	736 bytes	0644
60-serial.rules	1190 bytes	0644
60-tpm-udev.rules	243 bytes	0644
61-persistent-storage-android.rules	455 bytes	0644
63-md-raid-arrays.rules	2452 bytes	0644
64-btrfs-dm.rules	387 bytes	0644
64-btrfs-zoned.rules	346 bytes	0644
64-btrfs.rules	612 bytes	0644
64-md-raid-assembly.rules	1462 bytes	0644
66-azure-ephemeral.rules	1951 bytes	0644
68-del-part-nodes.rules	1141 bytes	0644
69-bcache.rules	1044 bytes	0644
69-lvm-metad.rules	5813 bytes	0644
69-md-clustered-confirm-device.rules	846 bytes	0644
70-iscsi-network-interface.rules	226 bytes	0644
70-joystick.rules	432 bytes	0644
70-memory.rules	184 bytes	0644
70-mouse.rules	734 bytes	0644
70-open-iscsi.rules	253 bytes	0644
70-power-switch.rules	576 bytes	0644
70-touchpad.rules	473 bytes	0644
70-uaccess.rules	2676 bytes	0644
71-power-switch-proliant.rules	461 bytes	0644
71-seat.rules	3810 bytes	0644
73-seat-late.rules	643 bytes	0644
73-special-net-names.rules	969 bytes	0644
75-net-description.rules	452 bytes	0644
75-probe_mtd.rules	174 bytes	0644
78-graphics-card.rules	965 bytes	0644
78-sound-card.rules	4816 bytes	0644
80-debian-compat.rules	594 bytes	0644
80-drivers.rules	617 bytes	0644
80-net-setup-link.rules	295 bytes	0644
81-net-dhcp.rules	528 bytes	0644
85-hdparm.rules	82 bytes	0644
90-bolt.rules	359 bytes	0644
90-console-setup.rules	265 bytes	0644
95-dm-notify.rules	479 bytes	0644
95-kpartx.rules	1401 bytes	0644
96-e2scrub.rules	171 bytes	0644
99-lxd-agent.rules	141 bytes	0644
99-systemd.rules	4600 bytes	0644
99-vmware-scsi-udev.rules	433 bytes	0644

File Content: 56-dm-mpath.rules

File Content: `56-dm-mpath.rules`