diff options
| -rw-r--r-- | block.c | 2 | ||||
| -rw-r--r-- | include/qemu/hbitmap.h | 8 | ||||
| -rw-r--r-- | tests/test-hbitmap.c | 38 | ||||
| -rw-r--r-- | util/hbitmap.c | 13 |
4 files changed, 60 insertions, 1 deletions
@@ -3513,7 +3513,7 @@ void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap) { assert(bdrv_dirty_bitmap_enabled(bitmap)); - hbitmap_reset(bitmap->bitmap, 0, bitmap->size); + hbitmap_reset_all(bitmap->bitmap); } void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h index f0a85f8..bb94a00 100644 --- a/include/qemu/hbitmap.h +++ b/include/qemu/hbitmap.h @@ -132,6 +132,14 @@ void hbitmap_set(HBitmap *hb, uint64_t start, uint64_t count); void hbitmap_reset(HBitmap *hb, uint64_t start, uint64_t count); /** + * hbitmap_reset_all: + * @hb: HBitmap to operate on. + * + * Reset all bits in an HBitmap. + */ +void hbitmap_reset_all(HBitmap *hb); + +/** * hbitmap_get: * @hb: HBitmap to operate on. * @item: Bit to query (0-based). diff --git a/tests/test-hbitmap.c b/tests/test-hbitmap.c index 9f41b5f..161eeb4 100644 --- a/tests/test-hbitmap.c +++ b/tests/test-hbitmap.c @@ -184,6 +184,23 @@ static void hbitmap_test_reset(TestHBitmapData *data, } } +static void hbitmap_test_reset_all(TestHBitmapData *data) +{ + size_t n; + + hbitmap_reset_all(data->hb); + + n = (data->size + BITS_PER_LONG - 1) / BITS_PER_LONG; + if (n == 0) { + n = 1; + } + memset(data->bits, 0, n * sizeof(unsigned long)); + + if (data->granularity == 0) { + hbitmap_test_check(data, 0); + } +} + static void hbitmap_test_check_get(TestHBitmapData *data) { uint64_t count = 0; @@ -364,6 +381,26 @@ static void test_hbitmap_reset(TestHBitmapData *data, hbitmap_test_set(data, L3 / 2, L3); } +static void test_hbitmap_reset_all(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3 * 2, 0); + hbitmap_test_set(data, L1 - 1, L1 + 2); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, 0, L1 * 3); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L2, L1); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L2, L3 - L2 + 1); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L3 - 1, 3); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, 0, L3 * 2); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L3 / 2, L3); + hbitmap_test_reset_all(data); +} + static void test_hbitmap_granularity(TestHBitmapData *data, const void *unused) { @@ -627,6 +664,7 @@ int main(int argc, char **argv) hbitmap_test_add("/hbitmap/set/overlap", test_hbitmap_set_overlap); hbitmap_test_add("/hbitmap/reset/empty", test_hbitmap_reset_empty); hbitmap_test_add("/hbitmap/reset/general", test_hbitmap_reset); + hbitmap_test_add("/hbitmap/reset/all", test_hbitmap_reset_all); hbitmap_test_add("/hbitmap/granularity", test_hbitmap_granularity); hbitmap_test_add("/hbitmap/truncate/nop", test_hbitmap_truncate_nop); diff --git a/util/hbitmap.c b/util/hbitmap.c index a10c7ae..50b888f 100644 --- a/util/hbitmap.c +++ b/util/hbitmap.c @@ -356,6 +356,19 @@ void hbitmap_reset(HBitmap *hb, uint64_t start, uint64_t count) hb_reset_between(hb, HBITMAP_LEVELS - 1, start, last); } +void hbitmap_reset_all(HBitmap *hb) +{ + unsigned int i; + + /* Same as hbitmap_alloc() except for memset() instead of malloc() */ + for (i = HBITMAP_LEVELS; --i >= 1; ) { + memset(hb->levels[i], 0, hb->sizes[i] * sizeof(unsigned long)); + } + + hb->levels[0][0] = 1UL << (BITS_PER_LONG - 1); + hb->count = 0; +} + bool hbitmap_get(const HBitmap *hb, uint64_t item) { /* Compute position and bit in the last layer. */ |