revert to non-vmstate supporting usb-hub.c

[qemu] / block-qcow.c

diff --git a/block-qcow.c b/block-qcow.c
index 730ae67..1fabc49 100644 (file)
--- a/block-qcow.c
+++ b/block-qcow.c
@@ -363,7 +363,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
                         }
                     }
                 }
-            } else {
+            } else if (allocate == 2) {
                 cluster_offset |= QCOW_OFLAG_COMPRESSED |
                     (uint64_t)compressed_size << (63 - s->cluster_bits);
             }
@@ -752,11 +752,15 @@ static int qcow_create(const char *filename, int64_t total_size,
     header_size = sizeof(header);
     backing_filename_len = 0;
     if (backing_file) {
-        header.backing_file_offset = cpu_to_be64(header_size);
-        backing_filename_len = strlen(backing_file);
-        header.backing_file_size = cpu_to_be32(backing_filename_len);
-        header_size += backing_filename_len;
-        header.mtime = cpu_to_be32(0);
+        if (strcmp(backing_file, "fat:")) {
+            header.backing_file_offset = cpu_to_be64(header_size);
+            backing_filename_len = strlen(backing_file);
+            header.backing_file_size = cpu_to_be32(backing_filename_len);
+            header_size += backing_filename_len;
+        } else {
+            /* special backing file for vvfat */
+            backing_file = NULL;
+        }
         header.cluster_bits = 9; /* 512 byte cluster to avoid copying
                                     unmodifyed sectors */
         header.l2_bits = 12; /* 32 KB L2 tables */
@@ -883,23 +887,20 @@ static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
 }
 
 BlockDriver bdrv_qcow = {
-    "qcow",
-    sizeof(BDRVQcowState),
-    qcow_probe,
-    qcow_open,
-    NULL,
-    NULL,
-    qcow_close,
-    qcow_create,
-    qcow_flush,
-    qcow_is_allocated,
-    qcow_set_key,
-    qcow_make_empty,
-
-    .bdrv_aio_read = qcow_aio_read,
-    .bdrv_aio_write = qcow_aio_write,
-    .bdrv_aio_cancel = qcow_aio_cancel,
-    .aiocb_size = sizeof(QCowAIOCB),
+    .format_name       = "qcow",
+    .instance_size     = sizeof(BDRVQcowState),
+    .bdrv_probe                = qcow_probe,
+    .bdrv_open         = qcow_open,
+    .bdrv_close                = qcow_close,
+    .bdrv_create       = qcow_create,
+    .bdrv_flush                = qcow_flush,
+    .bdrv_is_allocated = qcow_is_allocated,
+    .bdrv_set_key      = qcow_set_key,
+    .bdrv_make_empty   = qcow_make_empty,
+    .bdrv_aio_read     = qcow_aio_read,
+    .bdrv_aio_write    = qcow_aio_write,
+    .bdrv_aio_cancel   = qcow_aio_cancel,
+    .aiocb_size                = sizeof(QCowAIOCB),
     .bdrv_write_compressed = qcow_write_compressed,
-    .bdrv_get_info = qcow_get_info,
+    .bdrv_get_info     = qcow_get_info,
 };