user/sven/linux.git/include/linux/device-mapper.h, branch v3.3.5

dm table: add immutable feature

2011-10-31T20:19:04Z

Introduce DM_TARGET_IMMUTABLE to indicate that the target type cannot be mixed with any other target type, and once loaded into a device, it cannot be replaced with a table containing a different type. The thin provisioning pool device will use this. Signed-off-by: Alasdair G Kergon

dm table: add always writeable feature

2011-10-31T20:19:02Z

Add a target feature flag DM_TARGET_ALWAYS_WRITEABLE to indicate that a target does not support read-only mode. The initial implementation of the thin provisioning target uses this. Signed-off-by: Alasdair G Kergon

dm table: add singleton feature

2011-10-31T20:19:00Z

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

dm: use local printk ratelimit

2011-10-31T20:18:54Z

printk_ratelimit() shares global ratelimiting state with all other subsystems, so its usage is discouraged. Instead, define and use dm's local state. Signed-off-by: Namhyung Kim Signed-off-by: Alasdair G Kergon

dm crypt: always disable discard_zeroes_data

2011-09-25T22:26:21Z

If optional discard support in dm-crypt is enabled, discards requests bypass the crypt queue and blocks of the underlying device are discarded. For the read path, discarded blocks are handled the same as normal ciphertext blocks, thus decrypted. So if the underlying device announces discarded regions return zeroes, dm-crypt must disable this flag because after decryption there is just random noise instead of zeroes. Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon

dm table: share target argument parsing functions

2011-08-02T11:32:04Z

Move multipath target argument parsing code into dm-table so other targets can share it. Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon

dm table: allow targets to support discards internally

2011-05-29T11:52:55Z

Permit a target to support discards regardless of whether or not all its underlying devices do. Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon

md/dm - remove remains of plug_fn callback.

2011-04-18T08:25:41Z

Now that unplugging is done differently, the unplug_fn callback is never called, so it can be completely discarded. Signed-off-by: NeilBrown

block: remove per-queue plugging

2011-03-10T07:52:07Z

Code has been converted over to the new explicit on-stack plugging, and delay users have been converted to use the new API for that. So lets kill off the old plugging along with aops->sync_page(). Signed-off-by: Jens Axboe

dm: per target unplug callback support

2011-01-13T20:00:02Z

Add per-target unplug callback support. Cc: linux-raid@vger.kernel.org Signed-off-by: NeilBrown Signed-off-by: Jonathan Brassow Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon