blockdev: read-only-mode for blockdev-change-medium

[mirror_qemu.git] / blockdev.c

diff --git a/blockdev.c b/blockdev.c
index b3a958c4aa13bd51dc3f6f7d2e65ba9dce2a529c..34f6e5bbb0e7a8239bd70bf0d5aea98b139ec449 100644 (file)
--- a/blockdev.c
+++ b/blockdev.c
@@ -2145,6 +2145,8 @@ void qmp_blockdev_insert_medium(const char *device, const char *node_name,
 
 void qmp_blockdev_change_medium(const char *device, const char *filename,
                                 bool has_format, const char *format,
+                                bool has_read_only,
+                                BlockdevChangeReadOnlyMode read_only,
                                 Error **errp)
 {
     BlockBackend *blk;
@@ -2166,6 +2168,26 @@ void qmp_blockdev_change_medium(const char *device, const char *filename,
 
     bdrv_flags = blk_get_open_flags_from_root_state(blk);
 
+    if (!has_read_only) {
+        read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
+    }
+
+    switch (read_only) {
+    case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
+        break;
+
+    case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
+        bdrv_flags &= ~BDRV_O_RDWR;
+        break;
+
+    case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
+        bdrv_flags |= BDRV_O_RDWR;
+        break;
+
+    default:
+        abort();
+    }
+
     if (has_format) {
         options = qdict_new();
         qdict_put(options, "driver", qstring_from_str(format));