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