vmdk: support vmfs files

VMware ESX hosts also use different create and extent types for flat
files, respectively "vmfs" and "VMFS".  This is not documented, but it
can be found at http://kb.vmware.com/kb/10002511

 (Recreating a missing
virtual machine disk (VMDK) descriptor file).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

block/vmdk.c

@@ -719,7 +719,7 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
 
         if (sectors <= 0 ||
             (strcmp(type, "FLAT") && strcmp(type, "SPARSE") &&
-             strcmp(type, "VMFSSPARSE")) ||
+             strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) ||
             (strcmp(access, "RW"))) {
             goto next_line;
         }
@@ -732,7 +732,7 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
         }
 
         /* save to extents array */
-        if (!strcmp(type, "FLAT")) {
+        if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) {
             /* FLAT extent */
             VmdkExtent *extent;
 
@@ -790,6 +790,7 @@ static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
         goto exit;
     }
     if (strcmp(ct, "monolithicFlat") &&
+        strcmp(ct, "vmfs") &&
         strcmp(ct, "vmfsSparse") &&
         strcmp(ct, "twoGbMaxExtentSparse") &&
         strcmp(ct, "twoGbMaxExtentFlat")) {