View file File name : 60-multipath.rules Content :# Set DM_MULTIPATH_DEVICE_PATH if the device should be handled by multipath SUBSYSTEM!="block", GOTO="end_mpath" KERNEL!="sd*|dasd*|nvme*", GOTO="end_mpath" ACTION=="remove", TEST=="/run/multipath/find_multipaths/$major:$minor", \ RUN+="/usr/bin/rm -f /run/multipath/find_multipaths/$major:$minor" ACTION!="add|change", GOTO="end_mpath" IMPORT{cmdline}="nompath" ENV{nompath}=="?*", GOTO="end_mpath" IMPORT{cmdline}="multipath" ENV{multipath}=="off", GOTO="end_mpath" ENV{DEVTYPE}!="partition", GOTO="test_dev" IMPORT{parent}="DM_MULTIPATH_DEVICE_PATH" ENV{DM_MULTIPATH_DEVICE_PATH}=="1", ENV{ID_FS_TYPE}="none", \ ENV{SYSTEMD_READY}="0" GOTO="end_mpath" LABEL="test_dev" ENV{MPATH_SBIN_PATH}="/sbin" TEST!="$env{MPATH_SBIN_PATH}/multipath", ENV{MPATH_SBIN_PATH}="/usr/sbin" # FIND_MULTIPATHS_WAIT_UNTIL is the timeout (in seconds after the # epoch). IMPORT{db}="FIND_MULTIPATHS_WAIT_UNTIL" ENV{.SAVED_FM_WAIT_UNTIL}="$env{FIND_MULTIPATHS_WAIT_UNTIL}" # multipath -u needs to know if this device has ever been exported IMPORT{db}="DM_MULTIPATH_DEVICE_PATH" # multipath -u sets DM_MULTIPATH_DEVICE_PATH and, # if "find_multipaths smart", also FIND_MULTIPATHS_WAIT_UNTIL. IMPORT{program}="$env{MPATH_SBIN_PATH}/multipath -u %k" # case 1: this is definitely multipath ENV{DM_MULTIPATH_DEVICE_PATH}=="1", \ ENV{ID_FS_TYPE}="mpath_member", ENV{SYSTEMD_READY}="0", \ GOTO="stop_wait" # case 2: this is definitely not multipath, or timeout has expired ENV{DM_MULTIPATH_DEVICE_PATH}!="2", \ GOTO="stop_wait" # Code below here is only run in "smart" mode. # multipath -u has indicated this is "maybe" multipath. # Note that DM_MULTIPATH_DEVICE_PATH has the value 2 at this point. # This value will never propagate to other rules files, because # it will be reset to 1 in the "pretend_multipath" section below. # This shouldn't happen, just in case. ENV{FIND_MULTIPATHS_WAIT_UNTIL}!="?*", GOTO="end_mpath" # Be careful not to start the timer twice. ACTION!="add", GOTO="pretend_mpath" ENV{.SAVED_FM_WAIT_UNTIL}=="?*", GOTO="pretend_mpath" # At this point, we are seeing this path for the first time, and it's "maybe" multipath. # The actual start command for the timer. # # The purpose of this command is only to make sure we will receive another # uevent eventually. *Any* uevent may cause waiting to finish if it either ends # in case 1-3 above, or if it arrives after FIND_MULTIPATHS_WAIT_UNTIL. # # Note that this will try to activate multipathd if it isn't running yet. # If that fails, the unit starts and expires nonetheless. If multipathd # startup needs to wait for other services, this wait time will add up with # the --on-active timeout. # # We must trigger an "add" event because LVM2 will only act on those. RUN+="/usr/bin/systemd-run --unit=cancel-multipath-wait-$kernel --description 'cancel waiting for multipath siblings of $kernel' --no-block --timer-property DefaultDependencies=no --timer-property Conflicts=shutdown.target --timer-property Before=shutdown.target --timer-property AccuracySec=500ms --property DefaultDependencies=no --property Conflicts=shutdown.target --property Before=shutdown.target --property Wants=multipathd.service --property After=multipathd.service --on-active=$env{FIND_MULTIPATHS_WAIT_UNTIL} /usr/bin/udevadm trigger --action=add $sys$devpath" LABEL="pretend_mpath" ENV{DM_MULTIPATH_DEVICE_PATH}="1" ENV{SYSTEMD_READY}="0" GOTO="end_mpath" LABEL="stop_wait" # If timeout hasn't expired but we're not in "maybe" state any more, stop timer # Do this only once, and only if the timer has been started before IMPORT{db}="FIND_MULTIPATHS_WAIT_CANCELLED" ENV{FIND_MULTIPATHS_WAIT_CANCELLED}!="?*", \ ENV{FIND_MULTIPATHS_WAIT_UNTIL}=="?*", \ ENV{FIND_MULTIPATHS_WAIT_UNTIL}!="0", \ ENV{FIND_MULTIPATHS_WAIT_CANCELLED}="1", \ RUN+="/usr/bin/systemctl stop cancel-multipath-wait-$kernel.timer" LABEL="end_mpath"