diff options
| -rw-r--r-- | block/qcow2.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index cf4f3becae..486f3e83b7 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1480,7 +1480,22 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, s->autoclear_features &= QCOW2_AUTOCLEAR_MASK; } - if (qcow2_load_dirty_bitmaps(bs, &local_err)) { + if (bdrv_dirty_bitmap_next(bs, NULL)) { + /* It's some kind of reopen with already existing dirty bitmaps. There + * are no known cases where we need loading bitmaps in such situation, + * so it's safer don't load them. + * + * Moreover, if we have some readonly bitmaps and we are reopening for + * rw we should reopen bitmaps correspondingly. + */ + if (bdrv_has_readonly_bitmaps(bs) && + !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE)) + { + bool header_updated = false; + qcow2_reopen_bitmaps_rw_hint(bs, &header_updated, &local_err); + update_header = update_header && !header_updated; + } + } else if (qcow2_load_dirty_bitmaps(bs, &local_err)) { update_header = false; } if (local_err != NULL) { |