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Make udev rules more robust #78

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Make udev rules more robust #78

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0cae942
dmsetup: return non-zero on stdio I/O error
DemiMarie Apr 1, 2022
bedc445
Disable lvm2 udev rules if `dmsetup splitname` fails
DemiMarie Apr 1, 2022
45f8689
Disable udev rules if udev flags can't be obtained
DemiMarie Apr 1, 2022
b9ad503
Drop support for very old kernels
DemiMarie Apr 1, 2022
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Disable udev rules if udev flags can't be obtained 
In this cased the safest option is to disable most udev rules.
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@DemiMarie
DemiMarie committed Apr 3, 2022
commit 45f8689a14a60c30413431e5a779cc22ab6abea8
2 changes: 1 addition & 1 deletion udev/10-dm.rules.in
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Expand Up @@ -50,7 +50,7 @@ ACTION!="add|change", GOTO="dm_end"
# These flags are encoded in DM_COOKIE variable that was introduced in
# kernel version 2.6.31. Therefore, we can use this feature with
# kernels >= 2.6.31 only. Cookie is not decoded for remove event.
ENV{DM_COOKIE}=="?*", IMPORT{program}="(DM_EXEC)/dmsetup udevflags $env{DM_COOKIE}"
ENV{DM_COOKIE}=="?*", IMPORT{program}!="(DM_EXEC)/dmsetup udevflags $env{DM_COOKIE}", GOTO="dm_disable"

# Rule out easy-to-detect inappropriate events first.
ENV{DISK_RO}=="1", GOTO="dm_disable"
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