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block: reorganize QUEUE_ORDERED_* constants

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Separate out ordering type (drain,) and action masks (preflush,
postflush, fua) from visible ordering mode selectors
(QUEUE_ORDERED_*).  Ordering types are now named QUEUE_ORDERED_BY_*
while action masks are named QUEUE_ORDERED_DO_*.

This change is necessary to add QUEUE_ORDERED_DO_BAR and make it
optional to improve empty barrier implementation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Tejun Heo
2008-11-28 13:32:02 +09:00
committed by Jens Axboe
parent ba744d5e29
commit 313e42999d
2 changed files with 31 additions and 24 deletions
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35
include/linux/blkdev.h
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@@ -523,22 +523,29 @@ enum {
* TAG_FLUSH : ordering by tag w/ pre and post flushes
* TAG_FUA : ordering by tag w/ pre flush and FUA write
*/
QUEUE_ORDERED_NONE = 0x00,
QUEUE_ORDERED_DRAIN = 0x01,
QUEUE_ORDERED_TAG = 0x02,
QUEUE_ORDERED_BY_DRAIN = 0x01,
QUEUE_ORDERED_BY_TAG = 0x02,
QUEUE_ORDERED_DO_PREFLUSH = 0x10,
QUEUE_ORDERED_DO_POSTFLUSH = 0x40,
QUEUE_ORDERED_DO_FUA = 0x80,
QUEUE_ORDERED_PREFLUSH = 0x10,
QUEUE_ORDERED_POSTFLUSH = 0x20,
QUEUE_ORDERED_FUA = 0x40,
QUEUE_ORDERED_NONE = 0x00,
QUEUE_ORDERED_DRAIN_FLUSH = QUEUE_ORDERED_DRAIN |
QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH,
QUEUE_ORDERED_DRAIN_FUA = QUEUE_ORDERED_DRAIN |
QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_FUA,
QUEUE_ORDERED_TAG_FLUSH = QUEUE_ORDERED_TAG |
QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH,
QUEUE_ORDERED_TAG_FUA = QUEUE_ORDERED_TAG |
QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_FUA,
QUEUE_ORDERED_DRAIN = QUEUE_ORDERED_BY_DRAIN,
QUEUE_ORDERED_DRAIN_FLUSH = QUEUE_ORDERED_DRAIN |
QUEUE_ORDERED_DO_PREFLUSH |
QUEUE_ORDERED_DO_POSTFLUSH,
QUEUE_ORDERED_DRAIN_FUA = QUEUE_ORDERED_DRAIN |
QUEUE_ORDERED_DO_PREFLUSH |
QUEUE_ORDERED_DO_FUA,
QUEUE_ORDERED_TAG = QUEUE_ORDERED_BY_TAG,
QUEUE_ORDERED_TAG_FLUSH = QUEUE_ORDERED_TAG |
QUEUE_ORDERED_DO_PREFLUSH |
QUEUE_ORDERED_DO_POSTFLUSH,
QUEUE_ORDERED_TAG_FUA = QUEUE_ORDERED_TAG |
QUEUE_ORDERED_DO_PREFLUSH |
QUEUE_ORDERED_DO_FUA,
/*
* Ordered operation sequence