vhost-scsi: Add missing virtio-scsi -> TCM attribute conversion

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@lst.de>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: stable@vger.kernel.org # 3.5
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 01c01cb..d695b16 100644 (file)
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -911,6 +911,23 @@ vhost_scsi_map_iov_to_prot(struct tcm_vhost_cmd *cmd,
        return 0;
 }
 
+static int vhost_scsi_to_tcm_attr(int attr)
+{
+       switch (attr) {
+       case VIRTIO_SCSI_S_SIMPLE:
+               return TCM_SIMPLE_TAG;
+       case VIRTIO_SCSI_S_ORDERED:
+               return TCM_ORDERED_TAG;
+       case VIRTIO_SCSI_S_HEAD:
+               return TCM_HEAD_TAG;
+       case VIRTIO_SCSI_S_ACA:
+               return TCM_ACA_TAG;
+       default:
+               break;
+       }
+       return TCM_SIMPLE_TAG;
+}
+
 static void tcm_vhost_submission_work(struct work_struct *work)
 {
        struct tcm_vhost_cmd *cmd =
@@ -936,9 +953,10 @@ 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,
-                       NULL, 0, sg_prot_ptr, cmd->tvc_prot_sgl_count);
+                       vhost_scsi_to_tcm_attr(cmd->tvc_task_attr),
+                       cmd->tvc_data_direction, TARGET_SCF_ACK_KREF,
+                       sg_ptr, cmd->tvc_sgl_count, NULL, 0, sg_prot_ptr,
+                       cmd->tvc_prot_sgl_count);
        if (rc < 0) {
                transport_send_check_condition_and_sense(se_cmd,
                                TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);