[Qemu-devel] [PATCH v2 27/45] scsi-disk: Preserve tray state on migration

[Markus Armbruster <armbru@redhat.com>]

Breaks migration of qdevs "scsi-cd" and legacy "scsi-disk" to older
versions.  We normally use subsections to avoid that.  Not possible
here, because we don't have a section to begin with.  Too bad.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/scsi-disk.c |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index f223de6..04e0a77 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1301,6 +1301,39 @@ static int scsi_disk_initfn(SCSIDevice *dev)
     return scsi_initfn(dev, scsi_type);
 }
 
+static int scsi_cd_post_load(void *opaque, int version_id)
+{
+    SCSIDiskState *s = opaque;
+
+    bdrv_eject(s->bs, s->tray_open);
+    bdrv_lock_medium(s->bs, s->tray_locked);
+    return 0;
+}
+
+static const VMStateDescription vmstate_scsi_cd = {
+    .name = "scsi-cd",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .post_load = scsi_cd_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(tray_open, SCSIDiskState),
+        VMSTATE_BOOL(tray_locked, SCSIDiskState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static const VMStateDescription vmstate_scsi_disk = {
+    .name = "scsi-disk",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .post_load = scsi_cd_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(tray_open, SCSIDiskState),
+        VMSTATE_BOOL(tray_locked, SCSIDiskState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 #define DEFINE_SCSI_DISK_PROPERTIES()                           \
     DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf),          \
     DEFINE_PROP_STRING("ver",  SCSIDiskState, version),         \
@@ -1333,6 +1366,7 @@ static SCSIDeviceInfo scsi_disk_info[] = {
         .qdev.fw_name = "disk",
         .qdev.desc    = "virtual SCSI CD-ROM",
         .qdev.size    = sizeof(SCSIDiskState),
+        .qdev.vmsd    = &vmstate_scsi_cd,
         .qdev.reset   = scsi_disk_reset,
         .init         = scsi_cd_initfn,
         .destroy      = scsi_destroy,
@@ -1353,6 +1387,7 @@ static SCSIDeviceInfo scsi_disk_info[] = {
         .qdev.fw_name = "disk",
         .qdev.desc    = "virtual SCSI disk or CD-ROM (legacy)",
         .qdev.size    = sizeof(SCSIDiskState),
+        .qdev.vmsd    = &vmstate_scsi_disk,
         .qdev.reset   = scsi_disk_reset,
         .init         = scsi_disk_initfn,
         .destroy      = scsi_destroy,
-- 
1.7.6