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block: add offset in blk_add_request_payload() 

We could kmalloc() the payload, so need the offset in page.

Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Ming Lin 2016-03-22 00:24:44 -07:00 committed by Jens Axboe
parent 81b76485af
commit 37e58237a1
4 changed files with 6 additions and 5 deletions
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5
block/blk-core.c
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@ -1523,6 +1523,7 @@ EXPORT_SYMBOL(blk_put_request);
* blk_add_request_payload - add a payload to a request
* @rq: request to update
* @page: page backing the payload
* @offset: offset in page
* @len: length of the payload.
*
* This allows to later add a payload to an already submitted request by
@ -1533,12 +1534,12 @@ EXPORT_SYMBOL(blk_put_request);
* discard requests should ever use it.
*/
void blk_add_request_payload(struct request *rq, struct page *page,
unsigned int len)
int offset, unsigned int len)
{
struct bio *bio = rq->bio;
bio->bi_io_vec->bv_page = page;
bio->bi_io_vec->bv_offset = 0;
bio->bi_io_vec->bv_offset = offset;
bio->bi_io_vec->bv_len = len;
bio->bi_iter.bi_size = len;

2
drivers/block/skd_main.c
View File

@ -562,7 +562,7 @@ skd_prep_discard_cdb(struct skd_scsi_request *scsi_req,
put_unaligned_be32(count, &buf[16]);
req = skreq->req;
blk_add_request_payload(req, page, len);
blk_add_request_payload(req, page, 0, len);
}
static void skd_request_fn_not_online(struct request_queue *q);

2
drivers/scsi/sd.c
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@ -779,7 +779,7 @@ static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd)
* discarded on disk. This allows us to report completion on the full
* amount of blocks described by the request.
*/
blk_add_request_payload(rq, page, len);
blk_add_request_payload(rq, page, 0, len);
ret = scsi_init_io(cmd);
rq->__data_len = nr_bytes;

2
include/linux/blkdev.h
View File

@ -779,7 +779,7 @@ extern struct request *blk_make_request(struct request_queue *, struct bio *,
extern void blk_rq_set_block_pc(struct request *);
extern void blk_requeue_request(struct request_queue *, struct request *);
extern void blk_add_request_payload(struct request *rq, struct page *page,
unsigned int len);
int offset, unsigned int len);
extern int blk_lld_busy(struct request_queue *q);
extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
struct bio_set *bs, gfp_t gfp_mask,