The block layer provides emulation of zone management operations targeting all zones of a zoned block device only for the zone reset operation (REQ_OP_ZONE_RESET). In order to correctly implement exporting of zoned block devices with NVMeOF, emulating zone management operations targeting all zones of a device is also necessary for the open, close and finish zone operations (REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE and REQ_OP_ZONE_FINISH). Instead of duplicating the code, export the existing helper from block layer so we can use a bio chaining pattern that is present in the block layer for REQ_OP_ZONE RESET all emulation in the NVMeOF zoned block device backend. Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxx> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx> --- block/blk-lib.c | 1 + include/linux/bio.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/block/blk-lib.c b/block/blk-lib.c index 7b256131b20b..9f09beadcbe3 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -21,6 +21,7 @@ struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp) return new; } +EXPORT_SYMBOL_GPL(blk_next_bio); int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, int flags, diff --git a/include/linux/bio.h b/include/linux/bio.h index a0b4cfdf62a4..b2491ead22a0 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -822,4 +822,6 @@ static inline void bio_set_polled(struct bio *bio, struct kiocb *kiocb) bio->bi_opf |= REQ_NOWAIT; } +struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); + #endif /* __LINUX_BIO_H */ -- 2.22.1
