[PULL,12/30] qcow2: Use offset_into_cluster()
diff mbox series

Message ID 20191219172441.7289-13-kwolf@redhat.com
State New
Headers show
Series
  • [PULL,01/30] iotests: Provide a function for checking the creation of huge files
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Commit Message

Kevin Wolf Dec. 19, 2019, 5:24 p.m. UTC
From: Alberto Garcia <berto@igalia.com>

There's a couple of places left in the qcow2 code that still do the
calculation manually, so let's replace them.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/qcow2.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

Patch
diff mbox series

diff --git a/block/qcow2.c b/block/qcow2.c
index de0e89cf25..375bbd0ad3 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -367,7 +367,7 @@  static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
                 return -EINVAL;
             }
 
-            if (bitmaps_ext.bitmap_directory_offset & (s->cluster_size - 1)) {
+            if (offset_into_cluster(s, bitmaps_ext.bitmap_directory_offset)) {
                 error_setg(errp, "bitmaps_ext: "
                                  "invalid bitmap directory offset");
                 return -EINVAL;
@@ -1959,9 +1959,8 @@  static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs,
 {
     BDRVQcow2State *s = bs->opaque;
     uint64_t cluster_offset;
-    int index_in_cluster, ret;
     unsigned int bytes;
-    int status = 0;
+    int ret, status = 0;
 
     qemu_co_mutex_lock(&s->lock);
 
@@ -1982,8 +1981,7 @@  static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs,
 
     if ((ret == QCOW2_CLUSTER_NORMAL || ret == QCOW2_CLUSTER_ZERO_ALLOC) &&
         !s->crypto) {
-        index_in_cluster = offset & (s->cluster_size - 1);
-        *map = cluster_offset | index_in_cluster;
+        *map = cluster_offset | offset_into_cluster(s, offset);
         *file = s->data_file->bs;
         status |= BDRV_BLOCK_OFFSET_VALID;
     }