Tryag File Manager - Edit By Mr.SaHr

//lib/udev/rules.d/11-dm-mpath.rules

ACTION!="add|change", GOTO="mpath_end"
ENV{DM_UDEV_RULES_VSN}!="?*", 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
ENV{DM_ACTION}=="PATH_FAILED", ENV{DM_NR_VALID_PATHS}=="0",\
	ENV{MPATH_DEVICE_READY}="0", GOTO="mpath_action"

# 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}=""

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"

# 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}!="0",\
	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}=="",\
	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}",\
	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
ENV{MPATH_DEVICE_READY}!="0", ENV{.MPATH_DEVICE_READY_OLD}=="0",\
	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}",\
	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="",\
	ENV{DM_ACTIVATION}="1"

LABEL="scan_import"
ENV{DM_NOSCAN}!="1", GOTO="mpath_end"
ENV{ID_FS_TYPE}!="?*", IMPORT{db}="ID_FS_TYPE"
ENV{ID_FS_USAGE}!="?*", IMPORT{db}="ID_FS_USAGE"
ENV{ID_FS_UUID}!="?*", IMPORT{db}="ID_FS_UUID"
ENV{ID_FS_ENC}!="?*", IMPORT{db}="ID_FS_UUID_ENC"
ENV{ID_FS_VERSION}!="?*", IMPORT{db}="ID_FS_VERSION"

LABEL="mpath_end"