Add version information for 0.10.0 release.

[qemu] / block-qcow.c

diff --git a/block-qcow.c b/block-qcow.c
index 730ae67..91c53b1 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 */