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bio: first step in sanitizing the bio->bi_rw flag testing

Browse source 
Get rid of any functions that test for these bits and make callers
use bio_rw_flagged() directly. Then it is at least directly apparent
what variable and flag they check.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2009-09-11 14:32:04 +02:00
commit 1f98a13f62
17 changed files with 54 additions and 60 deletions
Download patch file Download diff file Expand all files Collapse all files

25
block/blk-core.c
View file

@ -1114,24 +1114,24 @@ void init_request_from_bio(struct request *req, struct bio *bio)
* Inherit FAILFAST from bio (for read-ahead, and explicit
* FAILFAST). FAILFAST flags are identical for req and bio.
*/
if (bio_rw_ahead(bio))
if (bio_rw_flagged(bio, BIO_RW_AHEAD))
req->cmd_flags |= REQ_FAILFAST_MASK;
else
req->cmd_flags |= bio->bi_rw & REQ_FAILFAST_MASK;
if (unlikely(bio_discard(bio))) {
if (unlikely(bio_rw_flagged(bio, BIO_RW_DISCARD))) {
req->cmd_flags |= REQ_DISCARD;
if (bio_barrier(bio))
if (bio_rw_flagged(bio, BIO_RW_BARRIER))
req->cmd_flags |= REQ_SOFTBARRIER;
req->q->prepare_discard_fn(req->q, req);
} else if (unlikely(bio_barrier(bio)))
} else if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER)))
req->cmd_flags |= REQ_HARDBARRIER;
if (bio_sync(bio))
if (bio_rw_flagged(bio, BIO_RW_SYNCIO))
req->cmd_flags |= REQ_RW_SYNC;
if (bio_rw_meta(bio))
if (bio_rw_flagged(bio, BIO_RW_META))
req->cmd_flags |= REQ_RW_META;
if (bio_noidle(bio))
if (bio_rw_flagged(bio, BIO_RW_NOIDLE))
req->cmd_flags |= REQ_NOIDLE;
req->errors = 0;
@ -1155,12 +1155,12 @@ static int __make_request(struct request_queue *q, struct bio *bio)
int el_ret;
unsigned int bytes = bio->bi_size;
const unsigned short prio = bio_prio(bio);
const int sync = bio_sync(bio);
const int unplug = bio_unplug(bio);
const bool sync = bio_rw_flagged(bio, BIO_RW_SYNCIO);
const bool unplug = bio_rw_flagged(bio, BIO_RW_UNPLUG);
const unsigned int ff = bio->bi_rw & REQ_FAILFAST_MASK;
int rw_flags;
if (bio_barrier(bio) && bio_has_data(bio) &&
if (bio_rw_flagged(bio, BIO_RW_BARRIER) && bio_has_data(bio) &&
(q->next_ordered == QUEUE_ORDERED_NONE)) {
bio_endio(bio, -EOPNOTSUPP);
return 0;
@ -1174,7 +1174,7 @@ static int __make_request(struct request_queue *q, struct bio *bio)
spin_lock_irq(q->queue_lock);
if (unlikely(bio_barrier(bio)) || elv_queue_empty(q))
if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER)) || elv_queue_empty(q))
goto get_rq;
el_ret = elv_merge(q, &req, bio);
@ -1470,7 +1470,8 @@ static inline void __generic_make_request(struct bio *bio)
if (bio_check_eod(bio, nr_sectors))
goto end_io;
if (bio_discard(bio) && !q->prepare_discard_fn) {
if (bio_rw_flagged(bio, BIO_RW_DISCARD) &&
!q->prepare_discard_fn) {
err = -EOPNOTSUPP;
goto end_io;
}

2
block/cfq-iosched.c
View file

@ -257,7 +257,7 @@ static inline void cic_set_cfqq(struct cfq_io_context *cic,
*/
static inline int cfq_bio_sync(struct bio *bio)
{
if (bio_data_dir(bio) == READ || bio_sync(bio))
if (bio_data_dir(bio) == READ || bio_rw_flagged(bio, BIO_RW_SYNCIO))
return 1;
return 0;

3
block/elevator.c
View file

@ -79,7 +79,8 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
/*
* Don't merge file system requests and discard requests
*/
if (bio_discard(bio) != bio_discard(rq->bio))
if (bio_rw_flagged(bio, BIO_RW_DISCARD) !=
bio_rw_flagged(rq->bio, BIO_RW_DISCARD))
return 0;
/*