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For now, this is just a precaution. Normally, all the other (non-dm) rules should check DM_UDEV_DISABLE_OTHER_RULES_FLAG and therefore avoid setting any inotify watches as well. But let's make sure. Support for final assignment of the "nowatch" rule (the use of ":=") will appear in next udev release, v160. This should also work in previous udev versions but the setting won't be sealed so any further OPTIONS="watch" will always prevail there. We may want to add more specific "nowatch" rules later if needed.
38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
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#
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# This file is part of LVM2.
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# Udev rules for LVM.
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#
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# These rules create symlinks for LVM logical volumes in
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# /dev/VG directory (VG is an actual VG name). Some udev
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# environment variables are set (they can be used in later
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# rules as well):
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# DM_LV_NAME - logical volume name
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# DM_VG_NAME - volume group name
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# DM_LV_LAYER - logical volume layer (blank if not set)
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# "add" event is processed on coldplug only!
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ACTION!="add|change", GOTO="lvm_end"
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ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="lvm_end"
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ENV{DM_UUID}!="LVM-?*", GOTO="lvm_end"
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# Use DM name and split it up into its VG/LV/layer constituents.
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IMPORT{program}="$env{DM_SBIN_PATH}/dmsetup splitname --nameprefixes --noheadings --rows $env{DM_NAME}"
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ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}=="1", GOTO="lvm_end"
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# Do not create symlinks for inappropriate subdevices.
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ENV{DM_LV_NAME}=="pvmove?*|?*_vorigin", GOTO="lvm_disable"
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ENV{DM_LV_LAYER}=="?*", GOTO="lvm_disable"
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# Create symlinks for top-level devices only.
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ENV{DM_VG_NAME}=="?*", ENV{DM_LV_NAME}=="?*", SYMLINK+="$env{DM_VG_NAME}/$env{DM_LV_NAME}", GOTO="lvm_end"
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LABEL="lvm_disable"
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ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="1"
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ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
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OPTIONS:="nowatch"
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LABEL="lvm_end"
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