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bloc/qcow2: drop dirty_bitmaps_loaded state variable 

This variable doesn't work as it should, because it is actually cleared
in qcow2_co_invalidate_cache() by memset(). Drop it, as the following
patch will introduce new behavior.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2018-10-29 16:23:15 -04:00 committed by John Snow
parent 132adb6820
commit 2ea427efff
2 changed files with 2 additions and 18 deletions
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19
block/qcow2.c
View File

@ -1153,7 +1153,6 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
uint64_t ext_end;
uint64_t l1_vm_state_index;
bool update_header = false;
bool header_updated = false;
ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
if (ret < 0) {
@ -1492,23 +1491,9 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
s->autoclear_features &= QCOW2_AUTOCLEAR_MASK;
}
if (s->dirty_bitmaps_loaded) {
/* It's some kind of reopen. There are no known cases where we need to
* reload bitmaps in such a situation, so it's safer to skip 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))
{
qcow2_reopen_bitmaps_rw_hint(bs, &header_updated, &local_err);
}
} else {
header_updated = qcow2_load_dirty_bitmaps(bs, &local_err);
s->dirty_bitmaps_loaded = true;
if (qcow2_load_dirty_bitmaps(bs, &local_err)) {
update_header = false;
}
update_header = update_header && !header_updated;
if (local_err != NULL) {
error_propagate(errp, local_err);
ret = -EINVAL;

1
block/qcow2.h
View File

@ -300,7 +300,6 @@ typedef struct BDRVQcow2State {
uint32_t nb_bitmaps;
uint64_t bitmap_directory_size;
uint64_t bitmap_directory_offset;
bool dirty_bitmaps_loaded;
int flags;
int qcow_version;