[PATCH 4/5] null_blk: create a helper for zoned devices
From: Chaitanya Kulkarni <hidden>
Date: 2019-06-29 05:05:25
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
This patch creates a helper function for handling zoned block device operations. Signed-off-by: Chaitanya Kulkarni <redacted> --- drivers/block/null_blk_main.c | 50 +++++++++++++++++++++-------------- 1 file changed, 30 insertions(+), 20 deletions(-)
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index e75d187c7393..824392681a28 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c@@ -1214,6 +1214,34 @@ static inline int nullb_handle_memory_backed(struct nullb_cmd *cmd) return null_handle_rq(cmd); } +static inline void nullb_handle_zoned(struct nullb_cmd *cmd) +{ + unsigned int nr_sectors; + sector_t sector; + req_opf op; + + if (cmd->nq->dev->queue_mode == NULL_Q_BIO) { + op = bio_op(cmd->bio); + sector = cmd->bio->bi_iter.bi_sector; + nr_sectors = cmd->bio->bi_iter.bi_size >> 9; + } else { + op = req_op(cmd->rq); + sector = blk_rq_pos(cmd->rq); + nr_sectors = blk_rq_sectors(cmd->rq); + } + + switch ((op)) { + case REQ_OP_WRITE: + null_zone_write(cmd, sector, nr_sectors); + break; + case REQ_OP_ZONE_RESET: + null_zone_reset(cmd, sector); + break; + default: + break; + } +} + static blk_status_t null_handle_cmd(struct nullb_cmd *cmd) { struct nullb_device *dev = cmd->nq->dev;
@@ -1231,26 +1259,8 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd) err = nullb_handle_memory_backed(cmd); cmd->error = errno_to_blk_status(err); - if (!cmd->error && dev->zoned) { - sector_t sector; - unsigned int nr_sectors; - enum req_opf op; - - if (dev->queue_mode == NULL_Q_BIO) { - op = bio_op(cmd->bio); - sector = cmd->bio->bi_iter.bi_sector; - nr_sectors = cmd->bio->bi_iter.bi_size >> 9; - } else { - op = req_op(cmd->rq); - sector = blk_rq_pos(cmd->rq); - nr_sectors = blk_rq_sectors(cmd->rq); - } - - if (op == REQ_OP_WRITE) - null_zone_write(cmd, sector, nr_sectors); - else if (op == REQ_OP_ZONE_RESET) - null_zone_reset(cmd, sector); - } + if (!cmd->error && dev->zoned) + nullb_handle_zoned(cmd); out: /* Complete IO by inline, softirq or timer */ switch (dev->irqmode) {
--
2.21.0