[Qemu-devel] [PATCH 1/7] console: add qemu_console_lookup_by_device_name

[Gerd Hoffmann <kraxel@redhat.com>]

We have two places needing this, and a third one will come shortly.
So create a helper function for that so we don't diplicate code.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h |  2 ++
 ui/console.c         | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index adac36d..bbc3b7c 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -377,6 +377,8 @@ void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata);
 
 QemuConsole *qemu_console_lookup_by_index(unsigned int index);
 QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head);
+QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
+                                                uint32_t head, Error **errp);
 bool qemu_console_is_visible(QemuConsole *con);
 bool qemu_console_is_graphic(QemuConsole *con);
 bool qemu_console_is_fixedsize(QemuConsole *con);
diff --git a/ui/console.c b/ui/console.c
index 4b65c34..ddaa165 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1779,6 +1779,29 @@ QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head)
     return NULL;
 }
 
+QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
+                                                uint32_t head, Error **errp)
+{
+    DeviceState *dev;
+    QemuConsole *con;
+
+    dev = qdev_find_recursive(sysbus_get_default(), device_id);
+    if (dev == NULL) {
+        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+                  "Device '%s' not found", device_id);
+        return NULL;
+    }
+
+    con = qemu_console_lookup_by_device(dev, head);
+    if (con == NULL) {
+        error_setg(errp, "Device %s (head %d) is not bound to a QemuConsole",
+                   device_id, head);
+        return NULL;
+    }
+
+    return con;
+}
+
 bool qemu_console_is_visible(QemuConsole *con)
 {
     return (con == active_console) || (con->dcls > 0);
-- 
1.8.3.1