vhdx: Use QEMU UUID API

This removes our dependency to libuuid, so that the driver can always be
built.

Similar to how we handled data plane configure options, --enable-vhdx
and --disable-vhdx are also changed to a nop with a message saying it's
obsolete.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-Id: <1474432046-325-4-git-send-email-famz@redhat.com>

block/Makefile.objs

@@ -2,7 +2,7 @@ block-obj-y += raw_bsd.o qcow.o vdi.o vmdk.o cloop.o bochs.o vpc.o vvfat.o dmg.o
 block-obj-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o qcow2-cache.o
 block-obj-y += qed.o qed-gencb.o qed-l2-cache.o qed-table.o qed-cluster.o
 block-obj-y += qed-check.o
-block-obj-$(CONFIG_VHDX) += vhdx.o vhdx-endian.o vhdx-log.o
+block-obj-y += vhdx.o vhdx-endian.o vhdx-log.o
 block-obj-y += quorum.o
 block-obj-y += parallels.o blkdebug.o blkverify.o blkreplay.o
 block-obj-y += block-backend.o snapshot.o qapi.o

block/vhdx-endian.c

@@ -21,9 +21,6 @@
 #include "qemu/bswap.h"
 #include "block/vhdx.h"
 
-#include <uuid/uuid.h>
-
-
 /*
  * All the VHDX formats on disk are little endian - the following
  * are helper import/export functions to correctly convert

block/vhdx.c

@@ -25,8 +25,7 @@
 #include "qemu/bswap.h"
 #include "block/vhdx.h"
 #include "migration/migration.h"
-
+#include "qemu/uuid.h"
-#include <uuid/uuid.h>
 
 /* Options for VHDX creation */
 
@@ -213,11 +212,11 @@ bool vhdx_checksum_is_valid(uint8_t *buf, size_t size, int crc_offset)
  */
 void vhdx_guid_generate(MSGUID *guid)
 {
-    uuid_t uuid;
+    QemuUUID uuid;
     assert(guid != NULL);
 
-    uuid_generate(uuid);
+    qemu_uuid_generate(&uuid);
-    memcpy(guid, uuid, sizeof(MSGUID));
+    memcpy(guid, &uuid, sizeof(MSGUID));
 }
 
 /* Check for region overlaps inside the VHDX image */

configure

@@ -317,7 +317,6 @@ vte=""
 virglrenderer=""
 tpm="yes"
 libssh2=""
-vhdx=""
 numa=""
 tcmalloc="no"
 jemalloc="no"
@@ -1103,6 +1102,9 @@ for opt do
   --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
       echo "$0: $opt is obsolete, virtio-blk data-plane is always on" >&2
   ;;
+  --enable-vhdx|--disable-vhdx)
+      echo "$0: $opt is obsolete, VHDX driver is always built" >&2
+  ;;
   --disable-gtk) gtk="no"
   ;;
   --enable-gtk) gtk="yes"
@@ -1143,10 +1145,6 @@ for opt do
   ;;
   --enable-libssh2) libssh2="yes"
   ;;
-  --enable-vhdx) vhdx="yes"
-  ;;
-  --disable-vhdx) vhdx="no"
-  ;;
   --disable-numa) numa="no"
   ;;
   --enable-numa) numa="yes"
@@ -1389,7 +1387,6 @@ disabled with --disable-FEATURE, default is enabled if available:
   archipelago     Archipelago backend
   tpm             TPM support
   libssh2         ssh block device support
-  vhdx            support for the Microsoft VHDX image format
   numa            libnuma support
   tcmalloc        tcmalloc support
   jemalloc        jemalloc support
@@ -2690,19 +2687,6 @@ EOF
   fi
 fi
 
-if test "$vhdx" = "yes" ; then
-    if test "$uuid" = "no" ; then
-        error_exit "uuid required for VHDX support"
-    fi
-elif test "$vhdx" != "no" ; then
-    if test "$uuid" = "yes" ; then
-        vhdx=yes
-    else
-        vhdx=no
-    fi
-fi
-
-##########################################
 # xfsctl() probe, used for raw-posix
 if test "$xfs" != "no" ; then
   cat > $TMPC << EOF
@@ -4917,7 +4901,6 @@ echo "TPM support       $tpm"
 echo "libssh2 support   $libssh2"
 echo "TPM passthrough   $tpm_passthrough"
 echo "QOM debugging     $qom_cast_debug"
-echo "vhdx              $vhdx"
 echo "lzo support       $lzo"
 echo "snappy support    $snappy"
 echo "bzip2 support     $bzip2"
@@ -5443,10 +5426,6 @@ if test "$libssh2" = "yes" ; then
   echo "LIBSSH2_LIBS=$libssh2_libs" >> $config_host_mak
 fi
 
-if test "$vhdx" = "yes" ; then
-  echo "CONFIG_VHDX=y" >> $config_host_mak
-fi
-
 # USB host support
 if test "$libusb" = "yes"; then
   echo "HOST_USB=libusb legacy" >> $config_host_mak