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udev: proper reset of DM_UDEV_DISABLE_OTHER_RULES_FLAG and honour this flag in lvmetad rules

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Reset the DM_UDEV_OTHER_RULES_FLAG to original value right at the
time of dropping the DM_NOSCAN flag.

When DM_NOSCAN is set, the DM_UDEV_DISABLE_OTHER_RULES_FLAG is also set
to avoid udev processing in "other/foreign" rules. If the noscan flag
is dropped, the DM_UDEV_DISABLE_OTHER_RULES_FLAG should be reset to
its original value.

Also, lvmetad should respect the DM_UDEV_DISABLE_OTHER_RULES_FLAG
because if the volume is set with this flag it:
  - definitely is not a top-level device (so makes no sense for lvmetad scanning)
  - is not supposed to be scanned further (for any stacking on top of
    it, including LVM stacking itself and any autoactivation of stacked LVs)
This commit is contained in:
Peter Rajnoha 2013-10-29 13:15:45 +01:00
parent f3a6f7073b
commit 9d0621267d
2 changed files with 2 additions and 1 deletions
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2
udev/11-dm-lvm.rules.in
View File

@ -32,7 +32,7 @@ IMPORT{program}="(DM_EXEC)/dmsetup splitname --nameprefixes --noheadings --rows
# uevent that follows for this LV, even an artificially generated one).
ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", ENV{DM_NOSCAN}="1", ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
ENV{DM_SUBSYSTEM_UDEV_FLAG0}!="1", IMPORT{db}="DM_NOSCAN", IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
ENV{DM_SUBSYSTEM_UDEV_FLAG0}!="1", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}", \
ENV{DM_SUBSYSTEM_UDEV_FLAG0}!="1", ENV{DM_NOSCAN}=="1", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}", \
ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG_OLD}="", ENV{DM_NOSCAN}=""
ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}=="1", GOTO="lvm_end"

1
udev/69-dm-lvm-metad.rules.in
View File

@ -18,6 +18,7 @@ SUBSYSTEM!="block", GOTO="lvm_end"
(LVM_EXEC_RULE)
ENV{DM_NOSCAN}=="1", GOTO="lvm_end"
ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", GOTO="lvm_end"
# If the PV label got lost, inform lvmetad immediately.
# Detect the lost PV label by comparing previous ID_FS_TYPE value with current one.