target: Fail UNMAP when emulate_tpu=0



This patch adds a check within sbc_parse_cdb() to fail a UNMAP op,
if the backend device has emulate_tpu disabled.

Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

parent d0a91295

drivers/target/target_core_sbc.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -962,6 +962,11 @@ sbc_parse_cdb(struct se_cmd cmd, struct sbc_ops ops)
		if (!ops->execute_unmap)
		return TCM_UNSUPPORTED_SCSI_OPCODE;

		if (!dev->dev_attrib.emulate_tpu) {
		pr_err("Got UNMAP, but backend device has"
		" emulate_tpu disabled\n");
		return TCM_UNSUPPORTED_SCSI_OPCODE;
		}
		size = get_unaligned_be16(&cdb[7]);
		cmd->execute_cmd = ops->execute_unmap;
		break;