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bcache: use op_is_write instead of checking for REQ_WRITE 

We currently set REQ_WRITE/WRITE for all non READ IOs
like discard, flush, writesame, etc. In the next patches where we
no longer set up the op as a bitmap, we will not be able to
detect a operation direction like writesame by testing if REQ_WRITE is
set.

This has bcache use the op_is_write helper which will do the right
thing.

Signed-off-by: Mike Christie <mchristi@redhat.com>
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 14:31:47 -05:00 committed by Jens Axboe
parent 5111166693
commit c8d93247f1
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/md/bcache/io.c
View File

@ -111,7 +111,7 @@ void bch_bbio_count_io_errors(struct cache_set *c, struct bio *bio,
struct bbio *b = container_of(bio, struct bbio, bio);
struct cache *ca = PTR_CACHE(c, &b->key, 0);
unsigned threshold = bio->bi_rw & REQ_WRITE
unsigned threshold = op_is_write(bio_op(bio))
? c->congested_write_threshold_us
: c->congested_read_threshold_us;

6
drivers/md/bcache/request.c
View File

@ -383,7 +383,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
if (mode == CACHE_MODE_NONE ||
(mode == CACHE_MODE_WRITEAROUND &&
(bio->bi_rw & REQ_WRITE)))
op_is_write(bio_op(bio))))
goto skip;
if (bio->bi_iter.bi_sector & (c->sb.block_size - 1) ||
@ -404,7 +404,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
if (!congested &&
mode == CACHE_MODE_WRITEBACK &&
(bio->bi_rw & REQ_WRITE) &&
op_is_write(bio_op(bio)) &&
(bio->bi_rw & REQ_SYNC))
goto rescale;
@ -657,7 +657,7 @@ static inline struct search *search_alloc(struct bio *bio,
s->cache_miss = NULL;
s->d = d;
s->recoverable = 1;
s->write = (bio->bi_rw & REQ_WRITE) != 0;
s->write = op_is_write(bio_op(bio));
s->read_dirty_data = 0;
s->start_time = jiffies;