112 lines
4.5 KiB
Plaintext
112 lines
4.5 KiB
Plaintext
ACTION!="add|change", GOTO="mpath_end"
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ENV{DM_UDEV_RULES}!="?*", GOTO="mpath_end"
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ENV{DM_UUID}!="mpath-?*", GOTO="mpath_end"
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IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
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IMPORT{db}="MPATH_DEVICE_READY"
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# If this uevent didn't come from dm, don't try to update the
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# device state
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ENV{DM_COOKIE}!="?*", ENV{DM_ACTION}!="PATH_*", IMPORT{db}="DM_UDEV_DISABLE_OTHER_RULES_FLAG", IMPORT{db}="DM_NOSCAN", GOTO="scan_import"
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ENV{.MPATH_DEVICE_READY_OLD}="$env{MPATH_DEVICE_READY}"
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# multipath sets DM_SUBSYSTEM_UDEV_FLAG2 when it reloads a
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# table with no active devices. If this happens, mark the
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# device not ready
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ENV{DM_SUBSYSTEM_UDEV_FLAG2}=="1", ENV{MPATH_DEVICE_READY}="0",\
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GOTO="mpath_action"
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# If the last path has failed mark the device not ready
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# Note that DM_NR_VALID_PATHS is only set for PATH_FAILED|PATH_REINSTATED
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# events.
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# This may not be reliable, as events aren't necessarily received in order.
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ENV{DM_NR_VALID_PATHS}=="0", ENV{MPATH_DEVICE_READY}="0", GOTO="mpath_action"
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ENV{MPATH_SBIN_PATH}="/sbin"
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TEST!="$env{MPATH_SBIN_PATH}/multipath", ENV{MPATH_SBIN_PATH}="/usr/sbin"
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# Don't run multipath -U during "coldplug" after switching root,
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# because paths are just being added to the udev db.
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ACTION=="add", ENV{.MPATH_DEVICE_READY_OLD}=="1", GOTO="paths_ok"
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# Check the map state directly with multipath -U.
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# This doesn't attempt I/O on the device.
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PROGRAM=="$env{MPATH_SBIN_PATH}/multipath -U -v1 %k", GOTO="paths_ok"
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ENV{MPATH_DEVICE_READY}="0", GOTO="mpath_action"
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LABEL="paths_ok"
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# Don't mark a device ready on a PATH_FAILED event. even if
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# DM_NR_VALID_PATHS is greater than 0. Just keep the existing
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# value
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ENV{DM_ACTION}=="PATH_FAILED", GOTO="mpath_action"
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# This event is either a PATH_REINSTATED or a table reload where
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# there are active paths. Mark the device ready
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ENV{MPATH_DEVICE_READY}="1"
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LABEL="mpath_action"
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# DM_SUBSYSTEM_UDEV_FLAG0 is the "RELOAD" flag for multipath subsystem.
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# Drop the DM_ACTIVATION flag here as mpath reloads tables if any of its
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# paths are lost/recovered. For any stack above the mpath device, this is not
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# something that should be reacted upon since it would be useless extra work.
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# It's exactly mpath's job to provide *seamless* device access to any of the
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# paths that are available underneath.
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ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", \
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ENV{DM_ACTIVATION}="0", ENV{MPATH_UNCHANGED}="1"
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# For path failed or reinstated events, unset DM_ACTIVATION.
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# This is similar to the DM_SUBSYSTEM_UDEV_FLAG0 case above.
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ENV{DM_ACTION}=="PATH_FAILED|PATH_REINSTATED", \
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ENV{DM_ACTIVATION}="0", ENV{MPATH_UNCHANGED}="1"
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# Do not initiate scanning if no path is available,
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# otherwise there would be a hang or IO error on access.
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# We'd like to avoid this, especially within udev processing.
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ENV{MPATH_DEVICE_READY}=="0", ENV{DM_NOSCAN}="1"
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# Also skip all foreign rules if no path is available.
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# Remember the original value of DM_DISABLE_OTHER_RULES_FLAG
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# and restore it back once we have at least one path available.
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ENV{MPATH_DEVICE_READY}=="0", ENV{.MPATH_DEVICE_READY_OLD}=="1",\
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ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}=="",\
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ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}"
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ENV{MPATH_DEVICE_READY}=="0", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
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ENV{MPATH_DEVICE_READY}!="0", ENV{.MPATH_DEVICE_READY_OLD}=="0",\
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ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}",\
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ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="",\
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ENV{DM_ACTIVATION}="1", ENV{MPATH_UNCHANGED}="0"
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# The code to check multipath state ends here. We need to set
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# properties and symlinks regardless whether the map is usable or
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# not. If symlinks get lost, systemd may auto-unmount file systems.
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LABEL="scan_import"
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ENV{DM_NOSCAN}!="1", GOTO="import_end"
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IMPORT{db}="ID_FS_TYPE"
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IMPORT{db}="ID_FS_USAGE"
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IMPORT{db}="ID_FS_UUID"
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IMPORT{db}="ID_FS_UUID_ENC"
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IMPORT{db}="ID_FS_LABEL"
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IMPORT{db}="ID_FS_LABEL_ENC"
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IMPORT{db}="ID_FS_VERSION"
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LABEL="import_end"
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# Multipath maps should take precedence over their members.
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ENV{DM_UDEV_LOW_PRIORITY_FLAG}!="1", OPTIONS+="link_priority=50"
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# Set some additional symlinks that typically exist for mpath
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# path members, too, and should be overridden.
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# kpartx_id is very robust, it works for suspended maps and maps
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# with 0 dependencies. It sets DM_TYPE, DM_PART, DM_WWN
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TEST=="/usr/lib/udev/kpartx_id", \
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IMPORT{program}=="kpartx_id %M %m $env{DM_UUID}"
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ENV{DM_TYPE}=="?*", ENV{DM_SERIAL}=="?*", \
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SYMLINK+="disk/by-id/$env{DM_TYPE}-$env{DM_SERIAL}"
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ENV{DM_WWN}=="?*", SYMLINK+="disk/by-id/wwn-$env{DM_WWN}"
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LABEL="mpath_end"
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