Don't use error propagation in qcow2_get_specific_info(). For this
refactor qcow2_get_bitmap_info_list, its current interface is rather
weird.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Greg Kurz <gr...@kaod.org>
Reviewed-by: Alberto Garcia <be...@igalia.com>
---
block/qcow2.h | 4 ++--
block/qcow2-bitmap.c | 28 ++++++++++++++--------------
block/qcow2.c | 10 +++-------
3 files changed, 19 insertions(+), 23 deletions(-)
diff --git a/block/qcow2.h b/block/qcow2.h
index 0678073b74..a6bf2881bb 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -979,8 +979,8 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs,
BdrvCheckResult *res,
void **refcount_table,
int64_t *refcount_table_size);
bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp);
-Qcow2BitmapInfoList *qcow2_get_bitmap_info_list(BlockDriverState *bs,
- Error **errp);
+bool qcow2_get_bitmap_info_list(BlockDriverState *bs,
+ Qcow2BitmapInfoList **info_list, Error **errp);
int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp);
int qcow2_truncate_bitmaps_check(BlockDriverState *bs, Error **errp);
void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs,
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index d7a31a8ddc..55cd52ab96 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -1093,30 +1093,30 @@ static Qcow2BitmapInfoFlagsList
*get_bitmap_info_flags(uint32_t flags)
/*
* qcow2_get_bitmap_info_list()
* Returns a list of QCOW2 bitmap details.
- * In case of no bitmaps, the function returns NULL and
- * the @errp parameter is not set.
- * When bitmap information can not be obtained, the function returns
- * NULL and the @errp parameter is set.
+ * On success return true with info_list set (note, that if there are no
+ * bitmaps, info_list is set to NULL).
+ * On failure return false with errp set.
*/
-Qcow2BitmapInfoList *qcow2_get_bitmap_info_list(BlockDriverState *bs,
- Error **errp)
+bool qcow2_get_bitmap_info_list(BlockDriverState *bs,
+ Qcow2BitmapInfoList **info_list, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
Qcow2BitmapList *bm_list;
Qcow2Bitmap *bm;
- Qcow2BitmapInfoList *list = NULL;
- Qcow2BitmapInfoList **plist = &list;
if (s->nb_bitmaps == 0) {
- return NULL;
+ *info_list = NULL;
+ return true;
}
bm_list = bitmap_list_load(bs, s->bitmap_directory_offset,
s->bitmap_directory_size, errp);
- if (bm_list == NULL) {
- return NULL;
+ if (!bm_list) {
+ return false;
}
+ *info_list = NULL;
+
QSIMPLEQ_FOREACH(bm, bm_list, entry) {
Qcow2BitmapInfo *info = g_new0(Qcow2BitmapInfo, 1);
Qcow2BitmapInfoList *obj = g_new0(Qcow2BitmapInfoList, 1);
@@ -1124,13 +1124,13 @@ Qcow2BitmapInfoList
*qcow2_get_bitmap_info_list(BlockDriverState *bs,
info->name = g_strdup(bm->name);
info->flags = get_bitmap_info_flags(bm->flags & ~BME_RESERVED_FLAGS);
obj->value = info;
- *plist = obj;
- plist = &obj->next;
+ *info_list = obj;
+ info_list = &obj->next;
}
bitmap_list_free(bm_list);
- return list;
+ return true;
}
int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp)
diff --git a/block/qcow2.c b/block/qcow2.c
index e8dd42d73b..1e83c6cebe 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -5063,12 +5063,10 @@ static ImageInfoSpecific
*qcow2_get_specific_info(BlockDriverState *bs,
BDRVQcow2State *s = bs->opaque;
ImageInfoSpecific *spec_info;
QCryptoBlockInfo *encrypt_info = NULL;
- Error *local_err = NULL;
if (s->crypto != NULL) {
- encrypt_info = qcrypto_block_get_info(s->crypto, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ encrypt_info = qcrypto_block_get_info(s->crypto, errp);
+ if (!encrypt_info) {
return NULL;
}
}
@@ -5085,9 +5083,7 @@ static ImageInfoSpecific
*qcow2_get_specific_info(BlockDriverState *bs,
};
} else if (s->qcow_version == 3) {
Qcow2BitmapInfoList *bitmaps;
- bitmaps = qcow2_get_bitmap_info_list(bs, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ if (!qcow2_get_bitmap_info_list(bs, &bitmaps, errp)) {
qapi_free_ImageInfoSpecific(spec_info);
qapi_free_QCryptoBlockInfo(encrypt_info);
return NULL;
--
2.29.2
