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hbitmap: drop meta bitmaps as they are unused

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Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20200205112041.6003-5-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-02-05 14:20:35 +03:00 committed by John Snow
parent 30b8346cc3
commit 0c88f1970c
3 changed files with 0 additions and 152 deletions
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21
include/qemu/hbitmap.h
View File

@ -325,27 +325,6 @@ int64_t hbitmap_next_zero(const HBitmap *hb, uint64_t start, uint64_t count);
bool hbitmap_next_dirty_area(const HBitmap *hb, uint64_t *start,
uint64_t *count);
/* hbitmap_create_meta:
* Create a "meta" hbitmap to track dirtiness of the bits in this HBitmap.
* The caller owns the created bitmap and must call hbitmap_free_meta(hb) to
* free it.
*
* Currently, we only guarantee that if a bit in the hbitmap is changed it
* will be reflected in the meta bitmap, but we do not yet guarantee the
* opposite.
*
* @hb: The HBitmap to operate on.
* @chunk_size: How many bits in @hb does one bit in the meta track.
*/
HBitmap *hbitmap_create_meta(HBitmap *hb, int chunk_size);
/* hbitmap_free_meta:
* Free the meta bitmap of @hb.
*
* @hb: The HBitmap whose meta bitmap should be freed.
*/
void hbitmap_free_meta(HBitmap *hb);
/**
* hbitmap_iter_next:
* @hbi: HBitmapIter to operate on.

115
tests/test-hbitmap.c
View File

@ -22,7 +22,6 @@
typedef struct TestHBitmapData {
HBitmap *hb;
HBitmap *meta;
unsigned long *bits;
size_t size;
size_t old_size;
@ -94,14 +93,6 @@ static void hbitmap_test_init(TestHBitmapData *data,
}
}
static void hbitmap_test_init_meta(TestHBitmapData *data,
uint64_t size, int granularity,
int meta_chunk)
{
hbitmap_test_init(data, size, granularity);
data->meta = hbitmap_create_meta(data->hb, meta_chunk);
}
static inline size_t hbitmap_test_array_size(size_t bits)
{
size_t n = DIV_ROUND_UP(bits, BITS_PER_LONG);
@ -144,9 +135,6 @@ static void hbitmap_test_teardown(TestHBitmapData *data,
const void *unused)
{
if (data->hb) {
if (data->meta) {
hbitmap_free_meta(data->hb);
}
hbitmap_free(data->hb);
data->hb = NULL;
}
@ -648,96 +636,6 @@ static void test_hbitmap_truncate_shrink_large(TestHBitmapData *data,
hbitmap_test_truncate(data, size, -diff, 0);
}
static void hbitmap_check_meta(TestHBitmapData *data,
int64_t start, int count)
{
int64_t i;
for (i = 0; i < data->size; i++) {
if (i >= start && i < start + count) {
g_assert(hbitmap_get(data->meta, i));
} else {
g_assert(!hbitmap_get(data->meta, i));
}
}
}
static void hbitmap_test_meta(TestHBitmapData *data,
int64_t start, int count,
int64_t check_start, int check_count)
{
hbitmap_reset_all(data->hb);
hbitmap_reset_all(data->meta);
/* Test "unset" -> "unset" will not update meta. */
hbitmap_reset(data->hb, start, count);
hbitmap_check_meta(data, 0, 0);
/* Test "unset" -> "set" will update meta */
hbitmap_set(data->hb, start, count);
hbitmap_check_meta(data, check_start, check_count);
/* Test "set" -> "set" will not update meta */
hbitmap_reset_all(data->meta);
hbitmap_set(data->hb, start, count);
hbitmap_check_meta(data, 0, 0);
/* Test "set" -> "unset" will update meta */
hbitmap_reset_all(data->meta);
hbitmap_reset(data->hb, start, count);
hbitmap_check_meta(data, check_start, check_count);
}
static void hbitmap_test_meta_do(TestHBitmapData *data, int chunk_size)
{
uint64_t size = chunk_size * 100;
hbitmap_test_init_meta(data, size, 0, chunk_size);
hbitmap_test_meta(data, 0, 1, 0, chunk_size);
hbitmap_test_meta(data, 0, chunk_size, 0, chunk_size);
hbitmap_test_meta(data, chunk_size - 1, 1, 0, chunk_size);
hbitmap_test_meta(data, chunk_size - 1, 2, 0, chunk_size * 2);
hbitmap_test_meta(data, chunk_size - 1, chunk_size + 1, 0, chunk_size * 2);
hbitmap_test_meta(data, chunk_size - 1, chunk_size + 2, 0, chunk_size * 3);
hbitmap_test_meta(data, 7 * chunk_size - 1, chunk_size + 2,
6 * chunk_size, chunk_size * 3);
hbitmap_test_meta(data, size - 1, 1, size - chunk_size, chunk_size);
hbitmap_test_meta(data, 0, size, 0, size);
}
static void test_hbitmap_meta_byte(TestHBitmapData *data, const void *unused)
{
hbitmap_test_meta_do(data, BITS_PER_BYTE);
}
static void test_hbitmap_meta_word(TestHBitmapData *data, const void *unused)
{
hbitmap_test_meta_do(data, BITS_PER_LONG);
}
static void test_hbitmap_meta_sector(TestHBitmapData *data, const void *unused)
{
hbitmap_test_meta_do(data, BDRV_SECTOR_SIZE * BITS_PER_BYTE);
}
/**
* Create an HBitmap and test set/unset.
*/
static void test_hbitmap_meta_one(TestHBitmapData *data, const void *unused)
{
int i;
int64_t offsets[] = {
0, 1, L1 - 1, L1, L1 + 1, L2 - 1, L2, L2 + 1, L3 - 1, L3, L3 + 1
};
hbitmap_test_init_meta(data, L3 * 2, 0, 1);
for (i = 0; i < ARRAY_SIZE(offsets); i++) {
hbitmap_test_meta(data, offsets[i], 1, offsets[i], 1);
hbitmap_test_meta(data, offsets[i], L1, offsets[i], L1);
hbitmap_test_meta(data, offsets[i], L2, offsets[i], L2);
}
}
static void test_hbitmap_serialize_align(TestHBitmapData *data,
const void *unused)
{
@ -750,13 +648,6 @@ static void test_hbitmap_serialize_align(TestHBitmapData *data,
g_assert_cmpint(r, ==, 64 << 3);
}
static void test_hbitmap_meta_zero(TestHBitmapData *data, const void *unused)
{
hbitmap_test_init_meta(data, 0, 0, 1);
hbitmap_check_meta(data, 0, 0);
}
static void hbitmap_test_serialize_range(TestHBitmapData *data,
uint8_t *buf, size_t buf_size,
uint64_t pos, uint64_t count)
@ -1165,12 +1056,6 @@ int main(int argc, char **argv)
hbitmap_test_add("/hbitmap/truncate/shrink/large",
test_hbitmap_truncate_shrink_large);
hbitmap_test_add("/hbitmap/meta/zero", test_hbitmap_meta_zero);
hbitmap_test_add("/hbitmap/meta/one", test_hbitmap_meta_one);
hbitmap_test_add("/hbitmap/meta/byte", test_hbitmap_meta_byte);
hbitmap_test_add("/hbitmap/meta/word", test_hbitmap_meta_word);
hbitmap_test_add("/hbitmap/meta/sector", test_hbitmap_meta_sector);
hbitmap_test_add("/hbitmap/serialize/align",
test_hbitmap_serialize_align);
hbitmap_test_add("/hbitmap/serialize/basic",

16
util/hbitmap.c
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@ -905,22 +905,6 @@ bool hbitmap_merge(const HBitmap *a, const HBitmap *b, HBitmap *result)
return true;
}
HBitmap *hbitmap_create_meta(HBitmap *hb, int chunk_size)
{
assert(!(chunk_size & (chunk_size - 1)));
assert(!hb->meta);
hb->meta = hbitmap_alloc(hb->size << hb->granularity,
hb->granularity + ctz32(chunk_size));
return hb->meta;
}
void hbitmap_free_meta(HBitmap *hb)
{
assert(hb->meta);
hbitmap_free(hb->meta);
hb->meta = NULL;
}
char *hbitmap_sha256(const HBitmap *bitmap, Error **errp)
{
size_t size = bitmap->sizes[HBITMAP_LEVELS - 1] * sizeof(unsigned long);