Commit d8f53b0a authored Sep 24, 2020 by Damien Le Moal Committed by Jens Axboe Oct 13, 2020

scsi: handle zone resources errors



ZBC or ZAC disks that have a limit on the number of open zones may fail
a zone open command or a write to a zone that is not already implicitly
or explicitly open if the total number of open zones is already at the
maximum allowed.

For these operations, instead of returning the generic BLK_STS_IOERR,
return BLK_STS_ZONE_OPEN_RESOURCE which is returned as -ETOOMANYREFS to
the I/O issuer, allowing the device user to act appropriately on these
relatively benign zone resource errors.

Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent afaf5c6c

drivers/scsi/scsi_lib.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -758,6 +758,15 @@ static void scsi_io_completion_action(struct scsi_cmnd *cmd, int result)
		/* See SSC3rXX or current. */
		action = ACTION_FAIL;
		break;
		case DATA_PROTECT:
		action = ACTION_FAIL;
		if ((sshdr.asc == 0x0C && sshdr.ascq == 0x12) \|\|
		(sshdr.asc == 0x55 &&
		(sshdr.ascq == 0x0E \|\| sshdr.ascq == 0x0F))) {
		/* Insufficient zone resources */
		blk_stat = BLK_STS_ZONE_OPEN_RESOURCE;
		}
		break;
		default:
		action = ACTION_FAIL;
		break;

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