linux-kernel - [PATCH 3.12 130/176] vhost-scsi: Add missing virtio-scsi -> TCM attribute conversion

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Message-Id: <0dc7138d884d21a4bc0091830c2cad3acb532f77.1422455352.git.jslaby@suse.cz>
Date:	Wed, 28 Jan 2015 15:29:20 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Nicholas Bellinger <nab@...ux-iscsi.org>,
	Christoph Hellwig <hch@....de>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 130/176] vhost-scsi: Add missing virtio-scsi -> TCM attribute conversion

From: Nicholas Bellinger <nab@...ux-iscsi.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 46243860806bdc2756f3ce8ac86b4d7c616bcd6c upstream.

While looking at hch's recent conversion to drop the MSG_*_TAG
definitions, I noticed a long standing bug in vhost-scsi where
the VIRTIO_SCSI_S_* attribute definitions where incorrectly
being passed directly into target_submit_cmd_map_sgls().

This patch adds the missing virtio-scsi to TCM/SAM task attribute
conversion.

Cc: Christoph Hellwig <hch@....de>
Cc: Michael S. Tsirkin <mst@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/vhost/scsi.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index c5b631cceb4c..d7fddc7d10d5 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -861,6 +861,23 @@ vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *cmd,
 	return 0;
 }
 
+static int vhost_scsi_to_tcm_attr(int attr)
+{
+	switch (attr) {
+	case VIRTIO_SCSI_S_SIMPLE:
+		return MSG_SIMPLE_TAG;
+	case VIRTIO_SCSI_S_ORDERED:
+		return MSG_ORDERED_TAG;
+	case VIRTIO_SCSI_S_HEAD:
+		return MSG_HEAD_TAG;
+	case VIRTIO_SCSI_S_ACA:
+		return MSG_ACA_TAG;
+	default:
+		break;
+	}
+	return MSG_SIMPLE_TAG;
+}
+
 static void tcm_vhost_submission_work(struct work_struct *work)
 {
 	struct tcm_vhost_cmd *cmd =
@@ -887,9 +904,9 @@ static void tcm_vhost_submission_work(struct work_struct *work)
 	rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess,
 			cmd->tvc_cdb, &cmd->tvc_sense_buf[0],
 			cmd->tvc_lun, cmd->tvc_exp_data_len,
-			cmd->tvc_task_attr, cmd->tvc_data_direction,
-			TARGET_SCF_ACK_KREF, sg_ptr, cmd->tvc_sgl_count,
-			sg_bidi_ptr, sg_no_bidi);
+			vhost_scsi_to_tcm_attr(cmd->tvc_task_attr),
+			cmd->tvc_data_direction, TARGET_SCF_ACK_KREF,
+			sg_ptr, cmd->tvc_sgl_count, sg_bidi_ptr, sg_no_bidi);
 	if (rc < 0) {
 		transport_send_check_condition_and_sense(se_cmd,
 				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
-- 
2.2.2

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