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421671b1c2
- we have these levels when the udev rules are processed:
10-dm.rules --> [11-dm-<subsystem>.rules] --> [12-dm-permissions.rules] -->
13-dm-disk.rules --> [...all the other foreign rules...] --> 95-dm-notify.rules
- each level can be disabled now by
DM_UDEV_DISABLE_{DM, SUBSYSTEM, DISK, OTHER}_RULES_FLAG
- add DM_UDEV_DISABLE_DM_RULES_FLAG to disable 10-dm.rules
- add DM_UDEV_DISABLE_OTHER_RULES_FLAG to disable all the other (non-dm) rules.
We cutoff these rules by using the 'last_rule', so this one should really be
used with great care and in well-founded situations. We use this for lvm's
hidden and layer devices now.
- add a parameter for add_dev_node, rm_dev_node and rename_dev_node so it's
possible to switch on/off udev checks
- use DM_UDEV_DISABLE_DM_RULES_FLAG and DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG
if there's no cookie set and we have resume, remove and rename ioctl.
This could happen when someone uses the libdevmapper that is compiled with
udev_sync but the software does not make use of it. This way we can switch
off the rules and fallback to libdevmapper node creation so there's no
udev/libdevmapper race.
33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
# Udev rules for device-mapper devices.
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#
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# These rules create symlinks in /dev/disk directory.
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# Symlinks that depend on probing filesystem type,
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# label and uuid are created only if the device is not
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# suspended.
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# "add" event is processed on coldplug only!
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ACTION!="add|change", GOTO="dm_end"
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ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="dm_other"
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ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}=="1", GOTO="dm_other"
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SYMLINK+="disk/by-id/dm-name-$env{DM_NAME}"
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ENV{DM_UUID}=="?*", SYMLINK+="disk/by-id/dm-uuid-$env{DM_UUID}"
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ENV{DM_SUSPENDED}=="1", GOTO="dm_other"
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IMPORT{program}="$env{DM_SBIN_PATH}/blkid -o udev -p $tempnode"
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ENV{DM_UDEV_LOW_PRIORITY_FLAG}=="1", OPTIONS="link_priority=-100"
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ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
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ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"
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# Cutoff all subsequent rules if instructed by a flag.
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# This flag should be used in well-founded situations only to prevent
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# any problems that could arise when processing this event further by
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# foreign rules (various temporary and hidden devices mostly).
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LABEL="dm_other"
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ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}!="1", GOTO="dm_end"
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ENV{DM_COOKIE}=="?*", RUN+="$env{DM_SBIN_PATH}/dmsetup udevcomplete $env{DM_COOKIE}"
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OPTIONS+="last_rule"
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LABEL="dm_end"
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