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qcow2: Use macros for the L1, refcount and bitmap table entry sizes

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This patch replaces instances of sizeof(uint64_t) in the qcow2 driver
with macros that indicate what those sizes are actually referring to.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20200828110828.13833-1-berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Alberto Garcia
2020-08-28 13:08:28 +02:00
committed by Max Reitz
parent af8d43d393
commit 02b1ecfa10
6 changed files with 94 additions and 83 deletions
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block/qcow2-bitmap.c
+7 -4
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@@ -42,6 +42,9 @@
#define BME_MIN_GRANULARITY_BITS 9
#define BME_MAX_NAME_SIZE 1023
/* Size of bitmap table entries */
#define BME_TABLE_ENTRY_SIZE (sizeof(uint64_t))
QEMU_BUILD_BUG_ON(BME_MAX_NAME_SIZE != BDRV_BITMAP_MAX_NAME_SIZE);
#if BME_MAX_TABLE_SIZE * 8ULL > INT_MAX
@@ -232,7 +235,7 @@ static int bitmap_table_load(BlockDriverState *bs, Qcow2BitmapTable *tb,
assert(tb->size <= BME_MAX_TABLE_SIZE);
ret = bdrv_pread(bs->file, tb->offset,
table, tb->size * sizeof(uint64_t));
table, tb->size * BME_TABLE_ENTRY_SIZE);
if (ret < 0) {
goto fail;
}
@@ -265,7 +268,7 @@ static int free_bitmap_clusters(BlockDriverState *bs, Qcow2BitmapTable *tb)
}
clear_bitmap_table(bs, bitmap_table, tb->size);
qcow2_free_clusters(bs, tb->offset, tb->size * sizeof(uint64_t),
qcow2_free_clusters(bs, tb->offset, tb->size * BME_TABLE_ENTRY_SIZE,
QCOW2_DISCARD_OTHER);
g_free(bitmap_table);
@@ -690,7 +693,7 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
ret = qcow2_inc_refcounts_imrt(bs, res,
refcount_table, refcount_table_size,
bm->table.offset,
bm->table.size * sizeof(uint64_t));
bm->table.size * BME_TABLE_ENTRY_SIZE);
if (ret < 0) {
goto out;
}
@@ -1797,7 +1800,7 @@ uint64_t qcow2_get_persistent_dirty_bitmap_size(BlockDriverState *in_bs,
/* Assume the entire bitmap is allocated */
bitmaps_size += bmclusters * cluster_size;
/* Also reserve space for the bitmap table entries */
bitmaps_size += ROUND_UP(bmclusters * sizeof(uint64_t),
bitmaps_size += ROUND_UP(bmclusters * BME_TABLE_ENTRY_SIZE,
cluster_size);
/* And space for contribution to bitmap directory size */
bitmap_dir_size += calc_dir_entry_size(strlen(name), 0);