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block discard: use bio set op accessor 

This converts the block issue discard helper and users to use
the bio_set_op_attrs accessor and only pass in the operation flags
like REQ_SEQURE.

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 14:31:49 -05:00 committed by Jens Axboe
parent 95fe6c1a20
commit 469e3216e2
3 changed files with 10 additions and 8 deletions
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13
block/blk-lib.c
View File

@ -23,7 +23,8 @@ static struct bio *next_bio(struct bio *bio, unsigned int nr_pages,
}
int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, int type, struct bio **biop)
sector_t nr_sects, gfp_t gfp_mask, int op_flags,
struct bio **biop)
{
struct request_queue *q = bdev_get_queue(bdev);
struct bio *bio = *biop;
@ -34,7 +35,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
return -ENXIO;
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
if ((type & REQ_SECURE) && !blk_queue_secdiscard(q))
if ((op_flags & REQ_SECURE) && !blk_queue_secdiscard(q))
return -EOPNOTSUPP;
/* Zero-sector (unknown) and one-sector granularities are the same. */
@ -65,7 +66,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
bio = next_bio(bio, 1, gfp_mask);
bio->bi_iter.bi_sector = sector;
bio->bi_bdev = bdev;
bio->bi_rw = type;
bio_set_op_attrs(bio, REQ_OP_DISCARD, op_flags);
bio->bi_iter.bi_size = req_sects << 9;
nr_sects -= req_sects;
@ -99,16 +100,16 @@ EXPORT_SYMBOL(__blkdev_issue_discard);
int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, unsigned long flags)
{
int type = REQ_WRITE | REQ_DISCARD;
int op_flags = 0;
struct bio *bio = NULL;
struct blk_plug plug;
int ret;
if (flags & BLKDEV_DISCARD_SECURE)
type |= REQ_SECURE;
op_flags |= REQ_SECURE;
blk_start_plug(&plug);
ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, type,
ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, op_flags,
&bio);
if (!ret && bio) {
ret = submit_bio_wait(bio);

2
drivers/md/dm-thin.c
View File

@ -360,7 +360,7 @@ static int issue_discard(struct discard_op *op, dm_block_t data_b, dm_block_t da
sector_t len = block_to_sectors(tc->pool, data_e - data_b);
return __blkdev_issue_discard(tc->pool_dev->bdev, s, len,
GFP_NOWAIT, REQ_WRITE | REQ_DISCARD, &op->bio);
GFP_NOWAIT, 0, &op->bio);
}
static void end_discard(struct discard_op *op, int r)

3
include/linux/blkdev.h
View File

@ -1149,7 +1149,8 @@ extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *);
extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, int type, struct bio **biop);
sector_t nr_sects, gfp_t gfp_mask, int op_flags,
struct bio **biop);
extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, struct page *page);
extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,