diff mbox series

[PULL,3/5] scsi-disk: convert more errno values back to SCSI statuses

Message ID 20201116195815.48264-4-pbonzini@redhat.com
State New
Headers show
Series [PULL,1/5] kvm/i386: Set proper nested state format for SVM | expand

Commit Message

Paolo Bonzini Nov. 16, 2020, 7:58 p.m. UTC 
Linux has some OS-specific (and sometimes weird) mappings for various SCSI
statuses and sense codes.  The most important is probably RESERVATION
CONFLICT.  Add them so that they can be reported back to the guest
kernel.

Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/scsi-disk.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
diff mbox series

Patch

diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index e859534eaf..90841ad791 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -461,6 +461,25 @@  static bool scsi_handle_rw_error(SCSIDiskReq *r, int error, bool acct_failed)
             }
             error = scsi_sense_buf_to_errno(r->req.sense, sizeof(r->req.sense));
             break;
+#ifdef CONFIG_LINUX
+            /* These errno mapping are specific to Linux.  For more information:
+             * - scsi_decide_disposition in drivers/scsi/scsi_error.c
+             * - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c
+             * - blk_errors[] in block/blk-core.c
+             */
+        case EBADE:
+            /* DID_NEXUS_FAILURE -> BLK_STS_NEXUS.  */
+            scsi_req_complete(&r->req, RESERVATION_CONFLICT);
+            break;
+        case ENODATA:
+            /* DID_MEDIUM_ERROR -> BLK_STS_MEDIUM.  */
+            scsi_check_condition(r, SENSE_CODE(READ_ERROR));
+            break;
+        case EREMOTEIO:
+            /* DID_TARGET_FAILURE -> BLK_STS_TARGET.  */
+            scsi_req_complete(&r->req, HARDWARE_ERROR);
+            break;
+#endif
         case ENOMEDIUM:
             scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
             break;