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qcow2: add persistent dirty bitmaps support

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Store persistent dirty bitmaps in qcow2 image.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170628120530.31251-20-vsementsov@virtuozzo.com
[mreitz: Always assign ret in store_bitmap() in case of an error]
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy
2017-07-11 17:44:58 +02:00
committed by Max Reitz
parent 3dd10a06d1
commit 5f72826e7f
3 changed files with 486 additions and 0 deletions
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block/qcow2-bitmap.c
+476
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File diff suppressed because it is too large Load Diff
block/qcow2.c
+9
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@@ -2046,6 +2046,7 @@ static int qcow2_inactivate(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
int ret, result = 0;
Error *local_err = NULL;
ret = qcow2_cache_flush(bs, s->l2_table_cache);
if (ret) {
@@ -2061,6 +2062,14 @@ static int qcow2_inactivate(BlockDriverState *bs)
strerror(-ret));
}
qcow2_store_persistent_dirty_bitmaps(bs, &local_err);
if (local_err != NULL) {
result = -EINVAL;
error_report_err(local_err);
error_report("Persistent bitmaps are lost for node '%s'",
bdrv_get_device_or_node_name(bs));
}
if (result == 0) {
qcow2_mark_clean(bs);
}
block/qcow2.h
+1
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@@ -647,5 +647,6 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
int64_t *refcount_table_size);
bool qcow2_load_autoloading_dirty_bitmaps(BlockDriverState *bs, Error **errp);
int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp);
void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp);
#endif