[Qemu-block] [PATCH v2 4/8] vdi: Use QEMU UUID API

[Fam Zheng]

The QEMU UUID api, including the data structure (QemuUUID), is fully
compatible with libuuid.  Use it, and remove the unused code.

Signed-off-by: Fam Zheng <address@hidden>
Reviewed-by: Stefan Weil <address@hidden>
---
 block/vdi.c | 49 ++++++++++---------------------------------------
 1 file changed, 10 insertions(+), 39 deletions(-)

diff --git a/block/vdi.c b/block/vdi.c
index 8a1cf97..79a2428 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -58,14 +58,7 @@
 #include "migration/migration.h"
 #include "qemu/coroutine.h"
 #include "qemu/cutils.h"
-
-#if defined(CONFIG_UUID)
-#include <uuid/uuid.h>
-#else
-/* TODO: move uuid emulation to some central place in QEMU. */
-#include "sysemu/sysemu.h"     /* UUID_FMT */
-typedef unsigned char uuid_t[16];
-#endif
+#include "qemu/uuid.h"
 
 /* Code configuration options. */
 
@@ -140,28 +133,6 @@ typedef unsigned char uuid_t[16];
 #define VDI_DISK_SIZE_MAX        ((uint64_t)VDI_BLOCKS_IN_IMAGE_MAX * \
                                   (uint64_t)DEFAULT_CLUSTER_SIZE)
 
-#if !defined(CONFIG_UUID)
-static inline void uuid_generate(uuid_t out)
-{
-    memset(out, 0, sizeof(uuid_t));
-}
-
-static inline int uuid_is_null(const uuid_t uu)
-{
-    uuid_t null_uuid = { 0 };
-    return memcmp(uu, null_uuid, sizeof(uuid_t)) == 0;
-}
-
-# if defined(CONFIG_VDI_DEBUG)
-static inline void uuid_unparse(const uuid_t uu, char *out)
-{
-    snprintf(out, 37, UUID_FMT,
-            uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7],
-            uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
-}
-# endif
-#endif
-
 typedef struct {
     char text[0x40];
     uint32_t signature;
@@ -182,10 +153,10 @@ typedef struct {
     uint32_t block_extra;       /* unused here */
     uint32_t blocks_in_image;
     uint32_t blocks_allocated;
-    uuid_t uuid_image;
-    uuid_t uuid_last_snap;
-    uuid_t uuid_link;
-    uuid_t uuid_parent;
+    QemuUUID uuid_image;
+    QemuUUID uuid_last_snap;
+    QemuUUID uuid_link;
+    QemuUUID uuid_parent;
     uint64_t unused2[7];
 } QEMU_PACKED VdiHeader;
 
@@ -209,7 +180,7 @@ typedef struct {
 /* Change UUID from little endian (IPRT = VirtualBox format) to big endian
  * format (network byte order, standard, see RFC 4122) and vice versa.
  */
-static void uuid_convert(uuid_t uuid)
+static void uuid_convert(QemuUUID uuid)
 {
     bswap32s((uint32_t *)&uuid[0]);
     bswap16s((uint16_t *)&uuid[4]);
@@ -469,11 +440,11 @@ static int vdi_open(BlockDriverState *bs, QDict *options, 
int flags,
                    (uint64_t)header.blocks_in_image * header.block_size);
         ret = -ENOTSUP;
         goto fail;
-    } else if (!uuid_is_null(header.uuid_link)) {
+    } else if (!qemu_uuid_is_null(header.uuid_link)) {
         error_setg(errp, "unsupported VDI image (non-NULL link UUID)");
         ret = -ENOTSUP;
         goto fail;
-    } else if (!uuid_is_null(header.uuid_parent)) {
+    } else if (!qemu_uuid_is_null(header.uuid_parent)) {
         error_setg(errp, "unsupported VDI image (non-NULL parent UUID)");
         ret = -ENOTSUP;
         goto fail;
@@ -821,8 +792,8 @@ static int vdi_create(const char *filename, QemuOpts *opts, 
Error **errp)
     if (image_type == VDI_TYPE_STATIC) {
         header.blocks_allocated = blocks;
     }
-    uuid_generate(header.uuid_image);
-    uuid_generate(header.uuid_last_snap);
+    qemu_uuid_generate(header.uuid_image);
+    qemu_uuid_generate(header.uuid_last_snap);
     /* There is no need to set header.uuid_link or header.uuid_parent here. */
 #if defined(CONFIG_VDI_DEBUG)
     vdi_header_print(&header);
-- 
2.7.4