3e1cb1f3dc07ff9883a03fe9edb4b2a parent 7f06965390e4a10fb6906c886324bfd0a96961be author Alasdair G Kergon 1320092340 +0000 committer Alasdair G Kergon 1320092340 +0000 dm table: add singleton feature Introduce the concept of a singleton table which contains exactly one target. If a target type sets the DM_TARGET_SINGLETON feature bit device-mapper will ensure that any table that includes that target contains no others. The thin provisioning pool target uses this. Signed-off-by: Alasdair G Kergon 8p½Š™'x