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null_blk: create a helper for zoned devices

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This patch creates a helper function for handling zoned block device
operations.

This patch also restructured the code for null_blk_zoned.c and uses the
pattern to return blk_status_t and catch the error in the function
null_handle_cmd() into cmd->error variable instead of setting it up in
the deeper layer just like the way it is done for flush, badblocks and
memory backed case in the null_handle_cmd(). We also move
null_handle_zoned() to the null_blk_zoned.c to keep the zoned code
separate.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chaitanya Kulkarni
2019-08-22 21:45:18 -07:00
committed by Jens Axboe
parent 7ea88e229e
commit fceb5d1b19
3 changed files with 35 additions and 27 deletions
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11
drivers/block/null_blk_main.c
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@@ -1209,14 +1209,9 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd, sector_t sector,
if (dev->memory_backed)
cmd->error = null_handle_memory_backed(cmd, op);
if (!cmd->error && dev->zoned) {
if (op == REQ_OP_WRITE)
null_zone_write(cmd, sector, nr_sectors);
else if (op == REQ_OP_ZONE_RESET)
null_zone_reset(cmd, sector);
else if (op == REQ_OP_ZONE_RESET_ALL)
null_zone_reset(cmd, 0);
}
if (!cmd->error && dev->zoned)
cmd->error = null_handle_zoned(cmd, op, sector, nr_sectors);
out:
/* Complete IO by inline, softirq or timer */
switch (dev->irqmode) {