linux-kernel - [PATCH] target: Handle GET_EVENT_STATUS

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Message-Id: <1335800113-28075-1-git-send-email-stefanha@linux.vnet.ibm.com>
Date:	Mon, 30 Apr 2012 16:35:13 +0100
From:	Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>
To:	<target-devel@...r.kernel.org>
Cc:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	linux-scsi@...r.kernel.org, <linux-kernel@...r.kernel.org>,
	Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>
Subject: [PATCH] target: Handle GET_EVENT_STATUS_NOTIFICATION passthrough

The SCSI MMC GET_EVENT_STATUS_NOTIFICATION command can be used to find
out about media change, among other things.  This patch adds it to the
command sequencer so that PSCSI CD-ROM passthrough works with modern
Linux guests that issue this command.

Tested-by: Cong Meng <mengcong@...ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>
---
 drivers/target/target_core_transport.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index a953ca0..5b83fd2 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -3146,6 +3146,10 @@ static int transport_generic_cmd_sequencer(
 			cmd->sam_task_attr = MSG_HEAD_TAG;
 		cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
 		break;
+	case GET_EVENT_STATUS_NOTIFICATION:
+		size = (cdb[7] << 8) | cdb[8];
+		cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+		break;
 	default:
 		pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
 			" 0x%02x, sending CHECK_CONDITION.\n",
-- 
1.7.10

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