Re: [Qemu-devel] [PATCH] ATAPI: Add support for ASCQ in sense codes

[Paolo Bonzini <pbonzini@redhat.com>]

Il 31/07/2012 04:07, Ronnie Sahlberg ha scritto:
> Add support for setting the ASCQ for SCSI sense codes in the ATAPI driver.
> Use this to set ASCQ==2 for the medium removal prevention that is recommended in MMC for this condition.
> 
> asc:0x53 ascq:0x02 is the recommended error for MEDIUM_REMOVAL_PREVENTED and is listed in Annex F in MMC

You also need to cover migration.

You could either add a subsection, or something like this:

diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c
index f7f714c..89c0157 100644
--- a/hw/ide/atapi.c
+++ b/hw/ide/atapi.c
@@ -1143,3 +1143,20 @@ void ide_atapi_cmd(IDEState *s)
 
     ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE);
 }
+
+void ide_atapi_post_load(IDEState *s, int version_id)
+{
+    if (version_id < 3) {
+        if (s->sense_key == UNIT_ATTENTION &&
+            s->asc == ASC_MEDIUM_MAY_HAVE_CHANGED) {
+            s->cdrom_changed = 1;
+        }
+    }
+
+    /* This is simpler than adding a subsection just for the ascq.  */
+    if (s->asc == ASC_MEDIA_REMOVAL_PREVENTED) {
+        s->ascq = 2;
+    } else {
+        s->ascq = 0;
+    }
+}
diff --git a/hw/ide/core.c b/hw/ide/core.c
index cb5ca4b..959ac48 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -2154,12 +2154,7 @@ static int ide_drive_post_load(void *opaque, int version_id)
 {
     IDEState *s = opaque;
 
-    if (version_id < 3) {
-        if (s->sense_key == UNIT_ATTENTION &&
-            s->asc == ASC_MEDIUM_MAY_HAVE_CHANGED) {
-            s->cdrom_changed = 1;
-        }
-    }
+    ide_atapi_post_load(s, version_id);
     if (s->identify_set) {
         bdrv_set_enable_write_cache(s->bs, !!(s->identify_data[85] & (1 << 5)));
     }
diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index 7170bd9..2572461 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -572,6 +572,7 @@ BlockDriverAIOCB *ide_issue_trim(BlockDriverState *bs,
 /* hw/ide/atapi.c */
 void ide_atapi_cmd(IDEState *s);
 void ide_atapi_cmd_reply_end(IDEState *s);
+void ide_atapi_post_load(IDEState *s, int version_id);
 
 /* hw/ide/qdev.c */
 void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id);


In fact, I wonder if it is simpler to "make up" the ascq directly in
cmd_request_sense, instead of changing all invocations of
ide_atapi_cmd_error.  Kevin, any preferences?

Paolo