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10-dm.rules: bump DM_UDEV_RULES_VSN to 3

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Bump the rules version in order to indicate that upper level rules
should consume DM_UDEV_DISABLE_OTHER_RULES_FLAG rather than DM_NOSCAN
and DM_SUSPENDED.

Also update the comments at the top of the file that describe the
exported properties, and add a note about internal device-mapper
properties.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Peter Rajnoha <prajnoha@redhat.com>
This commit is contained in:
Martin Wilck 2024-03-01 15:26:59 +01:00 committed by Peter Rajnoha
parent a196752969
commit 038f9254d9
1 changed files with 11 additions and 1 deletions
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12
udev/10-dm.rules.in
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@ -12,6 +12,9 @@
# DM_NAME - actual DM device's name
# DM_UUID - UUID set for DM device (blank if not specified)
# DM_UDEV_RULES_VSN - DM udev rules version
# DM_UDEV_DISABLE_OTHER_RULES_FLAG - a flag that indicates that
# stacked layers shouldn't attempt to probe the device, and
# should try to import relevant properties from the udev db.
#
# These rules cover only basic device-mapper functionality in udev.
#
@ -22,6 +25,11 @@
# 11-dm-lvm.rules for LVM subsystem
# 11-dm-mpath.rules for multipath subsystem (since version 0.6.0, recommended!)
#
# 11-dm<subsystem_name>.rules may use other DM related properties besides
# those listed above, like .DM_SUSPENDED. These properties are considered
# internal to device mapper, and subject to change without notice.
# Rules that are executed after 13-dm-disk.rules shouldn't use them.
#
# Even more specific rules may be required by subsystems so always
# check subsystem's upstream repository for recent set of rules.
# Also, keep in mind that recent rules may also require recent
@ -139,7 +147,9 @@ LABEL="dm_suspended_set"
# possible future changes.
# VSN 1 - original rules
# VSN 2 - add support for synthesized events
ENV{DM_UDEV_RULES_VSN}="2"
# VSN 3 - use DM_UDEV_DISABLE_OTHER_RULES_FLAG as the only "API"
# to be consumed by non-dm rules.
ENV{DM_UDEV_RULES_VSN}="3"
ENV{DM_UDEV_DISABLE_DM_RULES_FLAG}!="1", ENV{DM_NAME}=="?*", SYMLINK+="(DM_DIR)/$env{DM_NAME}"