[Qemu-devel] [PATCH] VMDK 2Gb bug

["Filip Navara" <xnavara@volny.cz>]

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There is a bug in the block-vmdk.c that prevents writing to images larger
than 2Gb on Windows host operating systems. Attached patch fixes it.

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Index: block-vmdk.c
===================================================================
RCS file: /sources/qemu/qemu/block-vmdk.c,v
retrieving revision 1.12
diff -u -r1.12 block-vmdk.c
--- block-vmdk.c	11 Jul 2007 10:25:58 -0000	1.12
+++ block-vmdk.c	8 Sep 2007 15:59:24 -0000
@@ -520,7 +520,6 @@
     int min_index, i, j;
     uint32_t min_count, *l2_table, tmp = 0;
     uint64_t cluster_offset;
-    int status;
 
     if (m_data)
         m_data->valid = 0;
@@ -564,19 +563,11 @@
     cluster_offset = le32_to_cpu(l2_table[l2_index]);
 
     if (!cluster_offset) {
-        struct stat file_buf;
-
         if (!allocate)
             return 0;
         // Avoid the L2 tables update for the images that have snapshots.
         if (!s->is_parent) {
-            status = stat(s->hd->filename, &file_buf);
-            if (status == -1) {
-                fprintf(stderr, "(VMDK) Fail file stat: filename =%s size=0x%llx errno=%s\n",
-                                s->hd->filename, (uint64_t)file_buf.st_size, strerror(errno));
-                return 0;
-            }
-            cluster_offset = file_buf.st_size;
+            cluster_offset = bdrv_getlength(s->hd);
             bdrv_truncate(s->hd, cluster_offset + (s->cluster_sectors << 9));
 
             cluster_offset >>= 9;