It's recommended for bool functions with errp to return true on success
and false on failure. Non-standard interfaces don't help to understand
the code. The change is also needed to reduce error propagation.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Alberto Garcia <be...@igalia.com>
Reviewed-by: Greg Kurz <gr...@kaod.org>
---
block/qcow2.h | 3 ++-
block/qcow2-bitmap.c | 26 +++++++++++++++-----------
block/qcow2.c | 6 ++----
3 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/block/qcow2.h b/block/qcow2.h
index a6bf2881bb..d19c883206 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -978,7 +978,8 @@ void qcow2_cache_discard(Qcow2Cache *c, void *table);
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);
+bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, bool *header_updated,
+ Error **errp);
bool qcow2_get_bitmap_info_list(BlockDriverState *bs,
Qcow2BitmapInfoList **info_list, Error **errp);
int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp);
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index c95d6e37e6..8b28e4c576 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -962,25 +962,27 @@ static void set_readonly_helper(gpointer bitmap, gpointer
value)
bdrv_dirty_bitmap_set_readonly(bitmap, (bool)value);
}
-/* qcow2_load_dirty_bitmaps()
- * Return value is a hint for caller: true means that the Qcow2 header was
- * updated. (false doesn't mean that the header should be updated by the
- * caller, it just means that updating was not needed or the image cannot be
- * written to).
- * On failure the function returns false.
+/*
+ * Return true on success, false on failure.
+ * If header_updated is not NULL then it is set appropriately regardless of
+ * the return value.
*/
-bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp)
+bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, bool *header_updated,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
Qcow2BitmapList *bm_list;
Qcow2Bitmap *bm;
GSList *created_dirty_bitmaps = NULL;
- bool header_updated = false;
bool needs_update = false;
+ if (header_updated) {
+ *header_updated = false;
+ }
+
if (s->nb_bitmaps == 0) {
/* No bitmaps - nothing to do */
- return false;
+ return true;
}
bm_list = bitmap_list_load(bs, s->bitmap_directory_offset,
@@ -1036,7 +1038,9 @@ bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error
**errp)
error_setg_errno(errp, -ret, "Can't update bitmap directory");
goto fail;
}
- header_updated = true;
+ if (header_updated) {
+ *header_updated = true;
+ }
}
if (!can_write(bs)) {
@@ -1047,7 +1051,7 @@ bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error
**errp)
g_slist_free(created_dirty_bitmaps);
bitmap_list_free(bm_list);
- return header_updated;
+ return true;
fail:
g_slist_foreach(created_dirty_bitmaps, release_dirty_bitmap_helper, bs);
diff --git a/block/qcow2.c b/block/qcow2.c
index 1e83c6cebe..20d67bd9c7 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1296,7 +1296,6 @@ static int coroutine_fn qcow2_do_open(BlockDriverState
*bs, QDict *options,
unsigned int len, i;
int ret = 0;
QCowHeader header;
- Error *local_err = NULL;
uint64_t ext_end;
uint64_t l1_vm_state_index;
bool update_header = false;
@@ -1784,9 +1783,8 @@ static int coroutine_fn qcow2_do_open(BlockDriverState
*bs, QDict *options,
if (!(bdrv_get_flags(bs) & BDRV_O_INACTIVE)) {
/* It's case 1, 2 or 3.2. Or 3.1 which is BUG in management layer. */
- bool header_updated = qcow2_load_dirty_bitmaps(bs, &local_err);
- if (local_err != NULL) {
- error_propagate(errp, local_err);
+ bool header_updated;
+ if (!qcow2_load_dirty_bitmaps(bs, &header_updated, errp)) {
ret = -EINVAL;
goto fail;
}
--
2.29.2
