[Qemu-devel] [PATCH v4 20/20] hmp: call the asynchronous QMP screendump to fix outdated/glitches

["Marc-André Lureau" <marcandre.lureau@redhat.com>]

In order to fix the bad screendumps (same as rhbz#1230527), call into
the asynchonous version of the QMP command.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 hmp.h           |  3 ++-
 hmp.c           |  6 ++----
 ui/console.c    | 22 ----------------------
 hmp-commands.hx |  3 ++-
 4 files changed, 6 insertions(+), 28 deletions(-)

diff --git a/hmp.h b/hmp.h
index 43617f2646..4059c8bea9 100644
--- a/hmp.h
+++ b/hmp.h
@@ -16,6 +16,7 @@
 
 #include "qemu-common.h"
 #include "qemu/readline.h"
+#include "qapi/qmp/dispatch.h"
 
 void hmp_info_name(Monitor *mon, const QDict *qdict);
 void hmp_info_version(Monitor *mon, const QDict *qdict);
@@ -102,7 +103,7 @@ void hmp_netdev_del(Monitor *mon, const QDict *qdict);
 void hmp_getfd(Monitor *mon, const QDict *qdict);
 void hmp_closefd(Monitor *mon, const QDict *qdict);
 void hmp_sendkey(Monitor *mon, const QDict *qdict);
-void hmp_screendump(Monitor *mon, const QDict *qdict);
+void hmp_screendump_async(Monitor *mon, const QDict *qdict, QmpReturn *qret);
 void hmp_nbd_server_start(Monitor *mon, const QDict *qdict);
 void hmp_nbd_server_add(Monitor *mon, const QDict *qdict);
 void hmp_nbd_server_remove(Monitor *mon, const QDict *qdict);
diff --git a/hmp.c b/hmp.c
index 9428c90c5d..60d2bc1c76 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2373,15 +2373,13 @@ err_out:
     goto out;
 }
 
-void hmp_screendump(Monitor *mon, const QDict *qdict)
+void hmp_screendump_async(Monitor *mon, const QDict *qdict, QmpReturn *qret)
 {
     const char *filename = qdict_get_str(qdict, "filename");
     const char *id = qdict_get_try_str(qdict, "device");
     int64_t head = qdict_get_try_int(qdict, "head", 0);
-    Error *err = NULL;
 
-    hmp_screendump_sync(filename, id != NULL, id, id != NULL, head, &err);
-    hmp_handle_error(mon, &err);
+    qmp_screendump(filename, id != NULL, id, id != NULL, head, qret);
 }
 
 void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
diff --git a/ui/console.c b/ui/console.c
index 620cd14b80..c259cf68aa 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -429,28 +429,6 @@ static QemuConsole *get_console(bool has_device, const char *device,
     return con;
 }
 
-void hmp_screendump_sync(const char *filename,
-                         bool has_device, const char *device,
-                         bool has_head, int64_t head, Error **errp)
-{
-    DisplaySurface *surface;
-    QemuConsole *con = get_console(has_device, device, has_head, head, errp);
-
-    if (!con) {
-        return;
-    }
-    /* This may not complete the drawing with Spice, you may have
-     * glitches or outdated dumps, use qmp instead! */
-    graphic_hw_update(con);
-    surface = qemu_console_surface(con);
-    if (!surface) {
-        error_setg(errp, "no surface");
-        return;
-    }
-
-    ppm_save(filename, surface, errp);
-}
-
 void qmp_screendump(const char *filename,
                     bool has_device, const char *device,
                     bool has_head, int64_t head,
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 9b4035965c..638b59e764 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -278,7 +278,8 @@ ETEXI
         .params     = "filename [device [head]]",
         .help       = "save screen from head 'head' of display device 'device' "
                       "into PPM image 'filename'",
-        .cmd        = hmp_screendump,
+        .async_cmd  = hmp_screendump_async,
+        .async      = true,
     },
 
 STEXI
-- 
2.21.0.196.g041f5ea1cf