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bio-integrity: Convert to bvec_iter

Browse source 
The bio integrity is also stored in a bvec array, so if we use the bvec
iter code we just added, the integrity code won't need to implement its
own iteration stuff (bio_integrity_mark_head(), bio_integrity_mark_tail())

Signed-off-by: Kent Overstreet <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: "Martin K. Petersen" <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
This commit is contained in:
Kent Overstreet 2013-11-23 17:20:16 -08:00
commit d57a5f7c66
4 changed files with 71 additions and 126 deletions
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40
block/blk-integrity.c
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@ -43,30 +43,32 @@ static const char *bi_unsupported_name = "unsupported";
*/
int blk_rq_count_integrity_sg(struct request_queue *q, struct bio *bio)
{
struct bio_vec *iv, *ivprv = NULL;
struct bio_vec iv, ivprv = { NULL };
unsigned int segments = 0;
unsigned int seg_size = 0;
unsigned int i = 0;
struct bvec_iter iter;
int prev = 0;
bio_for_each_integrity_vec(iv, bio, i) {
bio_for_each_integrity_vec(iv, bio, iter) {
if (ivprv) {
if (!BIOVEC_PHYS_MERGEABLE(ivprv, iv))
if (prev) {
if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, ivprv, iv))
if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
goto new_segment;
if (seg_size + iv->bv_len > queue_max_segment_size(q))
if (seg_size + iv.bv_len > queue_max_segment_size(q))
goto new_segment;
seg_size += iv->bv_len;
seg_size += iv.bv_len;
} else {
new_segment:
segments++;
seg_size = iv->bv_len;
seg_size = iv.bv_len;
}
prev = 1;
ivprv = iv;
}
@ -87,24 +89,25 @@ EXPORT_SYMBOL(blk_rq_count_integrity_sg);
int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
struct scatterlist *sglist)
{
struct bio_vec *iv, *ivprv = NULL;
struct bio_vec iv, ivprv = { NULL };
struct scatterlist *sg = NULL;
unsigned int segments = 0;
unsigned int i = 0;
struct bvec_iter iter;
int prev = 0;
bio_for_each_integrity_vec(iv, bio, i) {
bio_for_each_integrity_vec(iv, bio, iter) {
if (ivprv) {
if (!BIOVEC_PHYS_MERGEABLE(ivprv, iv))
if (prev) {
if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
goto new_segment;
if (!BIOVEC_SEG_BOUNDARY(q, ivprv, iv))
if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
goto new_segment;
if (sg->length + iv->bv_len > queue_max_segment_size(q))
if (sg->length + iv.bv_len > queue_max_segment_size(q))
goto new_segment;
sg->length += iv->bv_len;
sg->length += iv.bv_len;
} else {
new_segment:
if (!sg)
@ -114,10 +117,11 @@ new_segment:
sg = sg_next(sg);
}
sg_set_page(sg, iv->bv_page, iv->bv_len, iv->bv_offset);
sg_set_page(sg, iv.bv_page, iv.bv_len, iv.bv_offset);
segments++;
}
prev = 1;
ivprv = iv;
}