ublk: zoned: support REQ_OP_ZONE_RESET_ALL

There isn't any reason to not support REQ_OP_ZONE_RESET_ALL given everything
is actually handled in userspace, not mention it is pretty easy to support
RESET_ALL.

So enable REQ_OP_ZONE_RESET_ALL and let userspace handle it.

Verified by 'tools/zbc_reset_zone -all /dev/ublkb0' in libzbc[1] with
libublk-rs based ublk-zoned target prototype[2], follows command line
for creating ublk-zoned:

	cargo run --example zoned -- add -1 1024	# add $dev_id $DEV_SIZE

[1] https://github.com/westerndigitalcorporation/libzbc
[2] https://github.com/ming1/libublk-rs/tree/zoned.v2

Cc: Niklas Cassel <Niklas.Cassel@wdc.com>
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Andreas Hindborg <a.hindborg@samsung.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230810124326.321472-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 6ecd728..2d9cb59 100644 (file)
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -251,6 +251,7 @@ static int ublk_dev_param_zoned_apply(struct ublk_device *ub)
        const struct ublk_param_zoned *p = &ub->params.zoned;
 
        disk_set_zoned(ub->ub_disk, BLK_ZONED_HM);
+       blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, ub->ub_disk->queue);
        blk_queue_required_elevator_features(ub->ub_disk->queue,
                                             ELEVATOR_F_ZBD_SEQ_WRITE);
        disk_set_max_active_zones(ub->ub_disk, p->max_active_zones);
@@ -393,6 +394,9 @@ static blk_status_t ublk_setup_iod_zoned(struct ublk_queue *ubq,
        case REQ_OP_ZONE_APPEND:
                ublk_op = UBLK_IO_OP_ZONE_APPEND;
                break;
+       case REQ_OP_ZONE_RESET_ALL:
+               ublk_op = UBLK_IO_OP_ZONE_RESET_ALL;
+               break;
        case REQ_OP_DRV_IN:
                ublk_op = pdu->operation;
                switch (ublk_op) {
@@ -404,9 +408,8 @@ static blk_status_t ublk_setup_iod_zoned(struct ublk_queue *ubq,
                default:
                        return BLK_STS_IOERR;
                }
-       case REQ_OP_ZONE_RESET_ALL:
        case REQ_OP_DRV_OUT:
-               /* We do not support reset_all and drv_out */
+               /* We do not support drv_out */
                return BLK_STS_NOTSUPP;
        default:
                return BLK_STS_IOERR;

diff --git a/include/uapi/linux/ublk_cmd.h b/include/uapi/linux/ublk_cmd.h
index 2685e53..b9cfc5c 100644 (file)
--- a/include/uapi/linux/ublk_cmd.h
+++ b/include/uapi/linux/ublk_cmd.h
@@ -245,6 +245,7 @@ struct ublksrv_ctrl_dev_info {
 #define                UBLK_IO_OP_ZONE_CLOSE           11
 #define                UBLK_IO_OP_ZONE_FINISH          12
 #define                UBLK_IO_OP_ZONE_APPEND          13
+#define                UBLK_IO_OP_ZONE_RESET_ALL       14
 #define                UBLK_IO_OP_ZONE_RESET           15
 /*
  * Construct a zone report. The report request is carried in `struct