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null_blk: add zone open, close, and finish support

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Implement REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE and REQ_OP_ZONE_FINISH
support to allow explicit control of zone states.

Contains contributions from Matias Bjorling, Hans Holmberg,
Keith Busch and Damien Le Moal.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ajay Joshi <ajay.joshi@wdc.com>
Signed-off-by: Matias Bjorling <matias.bjorling@wdc.com>
Signed-off-by: Hans Holmberg <hans.holmberg@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ajay Joshi 2019-10-27 23:05:49 +09:00 committed by Jens Axboe
parent 2e2d6f7e44
commit da644b2cc1
1 changed files with 30 additions and 3 deletions
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33
drivers/block/null_blk_zoned.c
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@ -136,13 +136,14 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
return BLK_STS_OK;
}
static blk_status_t null_zone_reset(struct nullb_cmd *cmd, sector_t sector)
static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_opf op,
sector_t sector)
{
struct nullb_device *dev = cmd->nq->dev;
struct blk_zone *zone = &dev->zones[null_zone_no(dev, sector)];
size_t i;
switch (req_op(cmd->rq)) {
switch (op) {
case REQ_OP_ZONE_RESET_ALL:
for (i = 0; i < dev->nr_zones; i++) {
if (zone[i].type == BLK_ZONE_TYPE_CONVENTIONAL)
@ -158,6 +159,29 @@ static blk_status_t null_zone_reset(struct nullb_cmd *cmd, sector_t sector)
zone->cond = BLK_ZONE_COND_EMPTY;
zone->wp = zone->start;
break;
case REQ_OP_ZONE_OPEN:
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
return BLK_STS_IOERR;
if (zone->cond == BLK_ZONE_COND_FULL)
return BLK_STS_IOERR;
zone->cond = BLK_ZONE_COND_EXP_OPEN;
break;
case REQ_OP_ZONE_CLOSE:
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
return BLK_STS_IOERR;
if (zone->cond == BLK_ZONE_COND_FULL)
return BLK_STS_IOERR;
zone->cond = BLK_ZONE_COND_CLOSED;
break;
case REQ_OP_ZONE_FINISH:
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
return BLK_STS_IOERR;
zone->cond = BLK_ZONE_COND_FULL;
zone->wp = zone->start + zone->len;
break;
default:
cmd->error = BLK_STS_NOTSUPP;
break;
@ -173,7 +197,10 @@ blk_status_t null_handle_zoned(struct nullb_cmd *cmd, enum req_opf op,
return null_zone_write(cmd, sector, nr_sectors);
case REQ_OP_ZONE_RESET:
case REQ_OP_ZONE_RESET_ALL:
return null_zone_reset(cmd, sector);
case REQ_OP_ZONE_OPEN:
case REQ_OP_ZONE_CLOSE:
case REQ_OP_ZONE_FINISH:
return null_zone_mgmt(cmd, op, sector);
default:
return BLK_STS_OK;
}