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27 Jan 2021 23:11:46 -0800 From: Chaitanya Kulkarni To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, xen-devel@lists.xenproject.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-fscrypt@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-pm@vger.kernel.org, linux-mm@kvack.org Cc: axboe@kernel.dk, philipp.reisner@linbit.com, lars.ellenberg@linbit.com, konrad.wilk@oracle.com, roger.pau@citrix.com, minchan@kernel.org, ngupta@vflare.org, sergey.senozhatsky.work@gmail.com, agk@redhat.com, snitzer@redhat.com, hch@lst.de, sagi@grimberg.me, chaitanya.kulkarni@wdc.com, martin.petersen@oracle.com, viro@zeniv.linux.org.uk, tytso@mit.edu, jaegeuk@kernel.org, ebiggers@kernel.org, djwong@kernel.org, shaggy@kernel.org, konishi.ryusuke@gmail.com, mark@fasheh.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, damien.lemoal@wdc.com, naohiro.aota@wdc.com, jth@kernel.org, rjw@rjwysocki.net, len.brown@intel.com, pavel@ucw.cz, akpm@linux-foundation.org, hare@suse.de, gustavoars@kernel.org, tiwai@suse.de, alex.shi@linux.alibaba.com, asml.silence@gmail.com, ming.lei@redhat.com, tj@kernel.org, osandov@fb.com, bvanassche@acm.org, jefflexu@linux.alibaba.com Subject: [RFC PATCH 01/34] block: move common code into blk_next_bio() Date: Wed, 27 Jan 2021 23:11:00 -0800 Message-Id: <20210128071133.60335-2-chaitanya.kulkarni@wdc.com> X-Mailer: git-send-email 2.22.1 In-Reply-To: <20210128071133.60335-1-chaitanya.kulkarni@wdc.com> References: <20210128071133.60335-1-chaitanya.kulkarni@wdc.com> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: blk_next_bio() is the central function which allocates the bios for discard, write-same, write-zeroes and zone-mgmt. The initialization of various bio members is duplicated in disacrd, write-same, write-zeores. In this preparation patch we add bdev, sector, op, and opf arguments to the blk_next_bio() to reduce the duplication. In the next patch we introduce bio_new(), this prepration patch allows us to call it inside blk_next_bio(). Signed-off-by: Chaitanya Kulkarni --- block/blk-lib.c | 36 +++++++++++++++--------------------- block/blk-zoned.c | 4 +--- block/blk.h | 5 +++-- 3 files changed, 19 insertions(+), 26 deletions(-) diff --git a/block/blk-lib.c b/block/blk-lib.c index 752f9c722062..fb486a0bdb58 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -10,7 +10,9 @@ #include "blk.h" -struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp) +struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev, + sector_t sect, unsigned op, unsigned opf, + unsigned int nr_pages, gfp_t gfp) { struct bio *new = bio_alloc(gfp, nr_pages); @@ -19,6 +21,10 @@ struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp) submit_bio(bio); } + new->bi_iter.bi_sector = sect; + bio_set_dev(new, bdev); + bio_set_op_attrs(new, op, opf); + return new; } @@ -94,11 +100,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, WARN_ON_ONCE((req_sects << 9) > UINT_MAX); - bio = blk_next_bio(bio, 0, gfp_mask); - bio->bi_iter.bi_sector = sector; - bio_set_dev(bio, bdev); - bio_set_op_attrs(bio, op, 0); - + bio = blk_next_bio(bio, bdev, sector, op, 0, 0, gfp_mask); bio->bi_iter.bi_size = req_sects << 9; sector += req_sects; nr_sects -= req_sects; @@ -168,6 +170,7 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector, { struct request_queue *q = bdev_get_queue(bdev); unsigned int max_write_same_sectors; + unsigned int op = REQ_OP_WRITE_SAME; struct bio *bio = *biop; sector_t bs_mask; @@ -188,14 +191,11 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector, max_write_same_sectors = bio_allowed_max_sectors(q); while (nr_sects) { - bio = blk_next_bio(bio, 1, gfp_mask); - bio->bi_iter.bi_sector = sector; - bio_set_dev(bio, bdev); + bio = blk_next_bio(bio, bdev, sector, op, 0, 1, gfp_mask); bio->bi_vcnt = 1; bio->bi_io_vec->bv_page = page; bio->bi_io_vec->bv_offset = 0; bio->bi_io_vec->bv_len = bdev_logical_block_size(bdev); - bio_set_op_attrs(bio, REQ_OP_WRITE_SAME, 0); if (nr_sects > max_write_same_sectors) { bio->bi_iter.bi_size = max_write_same_sectors << 9; @@ -249,7 +249,9 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev, { struct bio *bio = *biop; unsigned int max_write_zeroes_sectors; + unsigned int op = REQ_OP_WRITE_ZEROES; struct request_queue *q = bdev_get_queue(bdev); + unsigned int opf = flags & BLKDEV_ZERO_NOUNMAP ? REQ_NOUNMAP : 0; if (!q) return -ENXIO; @@ -264,13 +266,7 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev, return -EOPNOTSUPP; while (nr_sects) { - bio = blk_next_bio(bio, 0, gfp_mask); - bio->bi_iter.bi_sector = sector; - bio_set_dev(bio, bdev); - bio->bi_opf = REQ_OP_WRITE_ZEROES; - if (flags & BLKDEV_ZERO_NOUNMAP) - bio->bi_opf |= REQ_NOUNMAP; - + bio = blk_next_bio(bio, bdev, sector, op, opf, 0, gfp_mask); if (nr_sects > max_write_zeroes_sectors) { bio->bi_iter.bi_size = max_write_zeroes_sectors << 9; nr_sects -= max_write_zeroes_sectors; @@ -303,6 +299,7 @@ static int __blkdev_issue_zero_pages(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop) { + unsigned int nr_pages = __blkdev_sectors_to_bio_pages(nr_sects); struct request_queue *q = bdev_get_queue(bdev); struct bio *bio = *biop; int bi_size = 0; @@ -315,11 +312,8 @@ static int __blkdev_issue_zero_pages(struct block_device *bdev, return -EPERM; while (nr_sects != 0) { - bio = blk_next_bio(bio, __blkdev_sectors_to_bio_pages(nr_sects), + bio = blk_next_bio(bio, bdev, sector, REQ_OP_WRITE, 0, nr_pages, gfp_mask); - bio->bi_iter.bi_sector = sector; - bio_set_dev(bio, bdev); - bio_set_op_attrs(bio, REQ_OP_WRITE, 0); while (nr_sects != 0) { sz = min((sector_t) PAGE_SIZE, nr_sects << 9); diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 7a68b6e4300c..68e77628348d 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -231,8 +231,7 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, return -EINVAL; while (sector < end_sector) { - bio = blk_next_bio(bio, 0, gfp_mask); - bio_set_dev(bio, bdev); + bio = blk_next_bio(bio, bdev, 0 , op, REQ_SYNC, 0, gfp_mask); /* * Special case for the zone reset operation that reset all @@ -244,7 +243,6 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, break; } - bio->bi_opf = op | REQ_SYNC; bio->bi_iter.bi_sector = sector; sector += zone_sectors; diff --git a/block/blk.h b/block/blk.h index 0198335c5838..0a278bae5478 100644 --- a/block/blk.h +++ b/block/blk.h @@ -329,8 +329,9 @@ extern int blk_iolatency_init(struct request_queue *q); static inline int blk_iolatency_init(struct request_queue *q) { return 0; } #endif -struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); - +struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev, + sector_t sect, unsigned op, unsigned opf, + unsigned int nr_pages, gfp_t gfp); #ifdef CONFIG_BLK_DEV_ZONED void blk_queue_free_zone_bitmaps(struct request_queue *q); #else