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block, drivers, fs: rename REQ_FLUSH to REQ_PREFLUSH

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To avoid confusion between REQ_OP_FLUSH, which is handled by
request_fn drivers, and upper layers requesting the block layer
perform a flush sequence along with possibly a WRITE, this patch
renames REQ_FLUSH to REQ_PREFLUSH.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Mike Christie
2016-06-05 14:32:25 -05:00
committed by Jens Axboe
parent a418090aa8
commit 28a8f0d317
39 changed files with 102 additions and 98 deletions
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12
drivers/md/dm-cache-target.c
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@@ -788,7 +788,7 @@ static void check_if_tick_bio_needed(struct cache *cache, struct bio *bio)
spin_lock_irqsave(&cache->lock, flags);
if (cache->need_tick_bio &&
!(bio->bi_rw & (REQ_FUA | REQ_FLUSH)) &&
!(bio->bi_rw & (REQ_FUA | REQ_PREFLUSH)) &&
bio_op(bio) != REQ_OP_DISCARD) {
pb->tick = true;
cache->need_tick_bio = false;
@@ -830,7 +830,7 @@ static dm_oblock_t get_bio_block(struct cache *cache, struct bio *bio)
static int bio_triggers_commit(struct cache *cache, struct bio *bio)
{
return bio->bi_rw & (REQ_FLUSH | REQ_FUA);
return bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
}
/*
@@ -1069,7 +1069,7 @@ static void dec_io_migrations(struct cache *cache)
static bool discard_or_flush(struct bio *bio)
{
return bio_op(bio) == REQ_OP_DISCARD ||
bio->bi_rw & (REQ_FLUSH | REQ_FUA);
bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
}
static void __cell_defer(struct cache *cache, struct dm_bio_prison_cell *cell)
@@ -1614,8 +1614,8 @@ static void process_flush_bio(struct cache *cache, struct bio *bio)
remap_to_cache(cache, bio, 0);
/*
* REQ_FLUSH is not directed at any particular block so we don't
* need to inc_ds(). REQ_FUA's are split into a write + REQ_FLUSH
* REQ_PREFLUSH is not directed at any particular block so we don't
* need to inc_ds(). REQ_FUA's are split into a write + REQ_PREFLUSH
* by dm-core.
*/
issue(cache, bio);
@@ -1980,7 +1980,7 @@ static void process_deferred_bios(struct cache *cache)
bio = bio_list_pop(&bios);
if (bio->bi_rw & REQ_FLUSH)
if (bio->bi_rw & REQ_PREFLUSH)
process_flush_bio(cache, bio);
else if (bio_op(bio) == REQ_OP_DISCARD)
process_discard_bio(cache, &structs, bio);