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Subject[PATCH V6 18/30] block: convert to bio_for_each_chunk_segment_all()
Date
We have to convert to bio_for_each_chunk_segment_all() for iterating page by
page.

bio_for_each_segment_all() can't be used any more after multipage bvec is
enabled.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
block/bio.c | 27 ++++++++++++++++++---------
block/blk-zoned.c | 5 +++--
block/bounce.c | 6 ++++--
include/linux/bio.h | 3 ++-
4 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 60219f82ddab..276fc35ec559 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1146,8 +1146,9 @@ static int bio_copy_from_iter(struct bio *bio, struct iov_iter *iter)
{
int i;
struct bio_vec *bvec;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
ssize_t ret;

ret = copy_page_from_iter(bvec->bv_page,
@@ -1177,8 +1178,9 @@ static int bio_copy_to_iter(struct bio *bio, struct iov_iter iter)
{
int i;
struct bio_vec *bvec;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
ssize_t ret;

ret = copy_page_to_iter(bvec->bv_page,
@@ -1200,8 +1202,9 @@ void bio_free_pages(struct bio *bio)
{
struct bio_vec *bvec;
int i;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i)
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer)
__free_page(bvec->bv_page);
}
EXPORT_SYMBOL(bio_free_pages);
@@ -1367,6 +1370,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
struct bio *bio;
int ret;
struct bio_vec *bvec;
+ struct bvec_chunk_iter citer;

if (!iov_iter_count(iter))
return ERR_PTR(-EINVAL);
@@ -1440,7 +1444,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
return bio;

out_unmap:
- bio_for_each_segment_all(bvec, bio, j) {
+ bio_for_each_chunk_segment_all(bvec, bio, j, citer) {
put_page(bvec->bv_page);
}
bio_put(bio);
@@ -1451,11 +1455,12 @@ static void __bio_unmap_user(struct bio *bio)
{
struct bio_vec *bvec;
int i;
+ struct bvec_chunk_iter citer;

/*
* make sure we dirty pages we wrote to
*/
- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
if (bio_data_dir(bio) == READ)
set_page_dirty_lock(bvec->bv_page);

@@ -1547,8 +1552,9 @@ static void bio_copy_kern_endio_read(struct bio *bio)
char *p = bio->bi_private;
struct bio_vec *bvec;
int i;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
memcpy(p, page_address(bvec->bv_page), bvec->bv_len);
p += bvec->bv_len;
}
@@ -1657,8 +1663,9 @@ void bio_set_pages_dirty(struct bio *bio)
{
struct bio_vec *bvec;
int i;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
if (!PageCompound(bvec->bv_page))
set_page_dirty_lock(bvec->bv_page);
}
@@ -1669,8 +1676,9 @@ static void bio_release_pages(struct bio *bio)
{
struct bio_vec *bvec;
int i;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i)
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer)
put_page(bvec->bv_page);
}

@@ -1717,8 +1725,9 @@ void bio_check_pages_dirty(struct bio *bio)
struct bio_vec *bvec;
unsigned long flags;
int i;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
if (!PageDirty(bvec->bv_page) && !PageCompound(bvec->bv_page))
goto defer;
}
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 3d08dc84db16..9223666c845d 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -123,6 +123,7 @@ int blkdev_report_zones(struct block_device *bdev,
unsigned int ofst;
void *addr;
int ret;
+ struct bvec_chunk_iter citer;

if (!q)
return -ENXIO;
@@ -190,7 +191,7 @@ int blkdev_report_zones(struct block_device *bdev,
n = 0;
nz = 0;
nr_rep = 0;
- bio_for_each_segment_all(bv, bio, i) {
+ bio_for_each_chunk_segment_all(bv, bio, i, citer) {

if (!bv->bv_page)
break;
@@ -223,7 +224,7 @@ int blkdev_report_zones(struct block_device *bdev,

*nr_zones = nz;
out:
- bio_for_each_segment_all(bv, bio, i)
+ bio_for_each_chunk_segment_all(bv, bio, i, citer)
__free_page(bv->bv_page);
bio_put(bio);

diff --git a/block/bounce.c b/block/bounce.c
index fd31347b7836..c6af0bd29ec9 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -146,11 +146,12 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool)
struct bio_vec *bvec, orig_vec;
int i;
struct bvec_iter orig_iter = bio_orig->bi_iter;
+ struct bvec_chunk_iter citer;

/*
* free up bounce indirect pages used
*/
- bio_for_each_segment_all(bvec, bio, i) {
+ bio_for_each_chunk_segment_all(bvec, bio, i, citer) {
orig_vec = bio_iter_iovec(bio_orig, orig_iter);
if (bvec->bv_page != orig_vec.bv_page) {
dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
@@ -206,6 +207,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
bool bounce = false;
int sectors = 0;
bool passthrough = bio_is_passthrough(*bio_orig);
+ struct bvec_chunk_iter citer;

bio_for_each_segment(from, *bio_orig, iter) {
if (i++ < BIO_MAX_PAGES)
@@ -225,7 +227,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
bio = bio_clone_bioset(*bio_orig, GFP_NOIO, passthrough ? NULL :
&bounce_bio_set);

- bio_for_each_segment_all(to, bio, i) {
+ bio_for_each_chunk_segment_all(to, bio, i, citer) {
struct page *page = to->bv_page;

if (page_to_pfn(page) <= q->limits.bounce_pfn)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index f21384be9b51..c22b8be961ce 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -374,10 +374,11 @@ static inline unsigned bio_pages_all(struct bio *bio)
{
unsigned i;
struct bio_vec *bv;
+ struct bvec_chunk_iter citer;

WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));

- bio_for_each_segment_all(bv, bio, i)
+ bio_for_each_chunk_segment_all(bv, bio, i, citer)
;
return i;
}
--
2.9.5
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