From: Fam Zheng <famz@redhat.com>

Date: Mon, 21 Aug 2017 22:10:06 +0800

Subject: [PATCH] scsi: Improve scsi_sense_to_errno

Tweak the errno mapping to return more accurate/appropriate values.

Signed-off-by: Fam Zheng <famz@redhat.com>

Message-Id: <20170821141008.19383-3-famz@redhat.com>

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

---

 util/scsi.c | 16 ++++++++++++----

 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/util/scsi.c b/util/scsi.c

index a6710799fc..472eb5bea5 100644

--- a/util/scsi.c

+++ b/util/scsi.c

@@ -18,13 +18,16 @@

 int scsi_sense_to_errno(int key, int asc, int ascq)

 {

     switch (key) {

-    case 0x02: /* NOT READY */

-        return EBUSY;

-    case 0x07: /* DATA PROTECTION */

-        return EACCES;

+    case 0x00: /* NO SENSE */

+    case 0x01: /* RECOVERED ERROR */

+    case 0x06: /* UNIT ATTENTION */

+        /* These sense keys are not errors */

+        return 0;

     case 0x0b: /* COMMAND ABORTED */

         return ECANCELED;

+    case 0x02: /* NOT READY */

     case 0x05: /* ILLEGAL REQUEST */

+    case 0x07: /* DATA PROTECTION */

         /* Parse ASCQ */

         break;

     default:

@@ -37,6 +40,7 @@ int scsi_sense_to_errno(int key, int asc, int ascq)

     case 0x2600: /* INVALID FIELD IN PARAMETER LIST */

         return EINVAL;

     case 0x2100: /* LBA OUT OF RANGE */

+    case 0x2707: /* SPACE ALLOC FAILED */

         return ENOSPC;

     case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */

         return ENOTSUP;

@@ -46,6 +50,10 @@ int scsi_sense_to_errno(int key, int asc, int ascq)

         return ENOMEDIUM;

     case 0x2700: /* WRITE PROTECTED */

         return EACCES;

+    case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */

+        return EAGAIN;

+    case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */

+        return ENOTCONN;

     default:

         return EIO;

     }