linux-kernel - [RFC PATCH 07/34] dm: use bio

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Date:   Wed, 27 Jan 2021 23:11:06 -0800
From:   Chaitanya Kulkarni <chaitanya.kulkarni@....com>
To:     linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        dm-devel@...hat.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, drbd-dev@...ts.linbit.com,
        xen-devel@...ts.xenproject.org, linux-nvme@...ts.infradead.org,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-fscrypt@...r.kernel.org,
        jfs-discussion@...ts.sourceforge.net, linux-nilfs@...r.kernel.org,
        ocfs2-devel@....oracle.com, linux-pm@...r.kernel.org,
        linux-mm@...ck.org
Cc:     axboe@...nel.dk, philipp.reisner@...bit.com,
        lars.ellenberg@...bit.com, konrad.wilk@...cle.com,
        roger.pau@...rix.com, minchan@...nel.org, ngupta@...are.org,
        sergey.senozhatsky.work@...il.com, agk@...hat.com,
        snitzer@...hat.com, hch@....de, sagi@...mberg.me,
        chaitanya.kulkarni@....com, martin.petersen@...cle.com,
        viro@...iv.linux.org.uk, tytso@....edu, jaegeuk@...nel.org,
        ebiggers@...nel.org, djwong@...nel.org, shaggy@...nel.org,
        konishi.ryusuke@...il.com, mark@...heh.com, jlbec@...lplan.org,
        joseph.qi@...ux.alibaba.com, damien.lemoal@....com,
        naohiro.aota@....com, jth@...nel.org, rjw@...ysocki.net,
        len.brown@...el.com, pavel@....cz, akpm@...ux-foundation.org,
        hare@...e.de, gustavoars@...nel.org, tiwai@...e.de,
        alex.shi@...ux.alibaba.com, asml.silence@...il.com,
        ming.lei@...hat.com, tj@...nel.org, osandov@...com,
        bvanassche@....org, jefflexu@...ux.alibaba.com
Subject: [RFC PATCH 07/34] dm: use bio_new in dm-log-writes

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@....com>
---
 drivers/md/dm-log-writes.c | 30 ++++++++++--------------------
 1 file changed, 10 insertions(+), 20 deletions(-)

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index e3d35c6c9f71..7ca9af407647 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -217,18 +217,15 @@ static int write_metadata(struct log_writes_c *lc, void *entry,
 	void *ptr;
 	size_t ret;
 
-	bio = bio_alloc(GFP_KERNEL, 1);
+	bio = bio_new(lc->logdev->bdev, sector, REQ_OP_WRITE, 0, 1, GFP_KERNEL);
 	if (!bio) {
 		DMERR("Couldn't alloc log bio");
 		goto error;
 	}
 	bio->bi_iter.bi_size = 0;
-	bio->bi_iter.bi_sector = sector;
-	bio_set_dev(bio, lc->logdev->bdev);
 	bio->bi_end_io = (sector == WRITE_LOG_SUPER_SECTOR) ?
 			  log_end_super : log_end_io;
 	bio->bi_private = lc;
-	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
 	page = alloc_page(GFP_KERNEL);
 	if (!page) {
@@ -264,7 +261,7 @@ static int write_inline_data(struct log_writes_c *lc, void *entry,
 			     size_t entrylen, void *data, size_t datalen,
 			     sector_t sector)
 {
-	int num_pages, bio_pages, pg_datalen, pg_sectorlen, i;
+	int num_pages, pg_datalen, pg_sectorlen, i;
 	struct page *page;
 	struct bio *bio;
 	size_t ret;
@@ -272,24 +269,21 @@ static int write_inline_data(struct log_writes_c *lc, void *entry,
 
 	while (datalen) {
 		num_pages = ALIGN(datalen, PAGE_SIZE) >> PAGE_SHIFT;
-		bio_pages = min(num_pages, BIO_MAX_PAGES);
 
 		atomic_inc(&lc->io_blocks);
 
-		bio = bio_alloc(GFP_KERNEL, bio_pages);
+		bio = bio_new(lc->logdev->bdev, sector, REQ_OP_WRITE, 0,
+			      num_pages, GFP_KERNEL);
 		if (!bio) {
 			DMERR("Couldn't alloc inline data bio");
 			goto error;
 		}
 
 		bio->bi_iter.bi_size = 0;
-		bio->bi_iter.bi_sector = sector;
-		bio_set_dev(bio, lc->logdev->bdev);
 		bio->bi_end_io = log_end_io;
 		bio->bi_private = lc;
-		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
-		for (i = 0; i < bio_pages; i++) {
+		for (i = 0; i < bio->bi_max_vecs; i++) {
 			pg_datalen = min_t(int, datalen, PAGE_SIZE);
 			pg_sectorlen = ALIGN(pg_datalen, lc->sectorsize);
 
@@ -317,7 +311,7 @@ static int write_inline_data(struct log_writes_c *lc, void *entry,
 		}
 		submit_bio(bio);
 
-		sector += bio_pages * PAGE_SECTORS;
+		sector += bio->bi_max_vecs * PAGE_SECTORS;
 	}
 	return 0;
 error_bio:
@@ -364,17 +358,15 @@ static int log_one_block(struct log_writes_c *lc,
 		goto out;
 
 	atomic_inc(&lc->io_blocks);
-	bio = bio_alloc(GFP_KERNEL, min(block->vec_cnt, BIO_MAX_PAGES));
+	bio = bio_new(lc->logdev->bdev, sector, REQ_OP_WRITE, 0,
+			block->vec_cnt, GFP_KERNEL);
 	if (!bio) {
 		DMERR("Couldn't alloc log bio");
 		goto error;
 	}
 	bio->bi_iter.bi_size = 0;
-	bio->bi_iter.bi_sector = sector;
-	bio_set_dev(bio, lc->logdev->bdev);
 	bio->bi_end_io = log_end_io;
 	bio->bi_private = lc;
-	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
 	for (i = 0; i < block->vec_cnt; i++) {
 		/*
@@ -386,17 +378,15 @@ static int log_one_block(struct log_writes_c *lc,
 		if (ret != block->vecs[i].bv_len) {
 			atomic_inc(&lc->io_blocks);
 			submit_bio(bio);
-			bio = bio_alloc(GFP_KERNEL, min(block->vec_cnt - i, BIO_MAX_PAGES));
+			bio = bio_new(lc->logdev->bdev, sector, REQ_OP_WRITE,
+					0, block->vec_cnt - i, GFP_KERNEL);
 			if (!bio) {
 				DMERR("Couldn't alloc log bio");
 				goto error;
 			}
 			bio->bi_iter.bi_size = 0;
-			bio->bi_iter.bi_sector = sector;
-			bio_set_dev(bio, lc->logdev->bdev);
 			bio->bi_end_io = log_end_io;
 			bio->bi_private = lc;
-			bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
 			ret = bio_add_page(bio, block->vecs[i].bv_page,
 					   block->vecs[i].bv_len, 0);
-- 
2.22.1