The only reason I can imagine for this strange code at the very-end of
bdrv_reopen_commit is the fact that bs->read_only updated after
calling drv->bdrv_reopen_commit in bdrv_reopen_commit. And in the same
time, prior to previous commit, qcow2_reopen_bitmaps_rw did a wrong
check for being writable, when actually it only need writable file
child not self.
So, as it's fixed, let's move things to correct place.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Acked-by: Max Reitz <mreitz@redhat.com>
Message-id:
20190927122355.7344-10-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
BlockDriver *drv;
BlockDriverState *bs;
BdrvChild *child;
- bool old_can_write, new_can_write;
assert(reopen_state != NULL);
bs = reopen_state->bs;
drv = bs->drv;
assert(drv != NULL);
- old_can_write =
- !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE);
-
/* If there are any driver level actions to take */
if (drv->bdrv_reopen_commit) {
drv->bdrv_reopen_commit(reopen_state);
}
bdrv_refresh_limits(bs, NULL);
-
- new_can_write =
- !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE);
- if (!old_can_write && new_can_write && drv->bdrv_reopen_bitmaps_rw) {
- Error *local_err = NULL;
- if (drv->bdrv_reopen_bitmaps_rw(bs, &local_err) < 0) {
- /* This is not fatal, bitmaps just left read-only, so all following
- * writes will fail. User can remove read-only bitmaps to unblock
- * writes.
- */
- error_reportf_err(local_err,
- "%s: Failed to make dirty bitmaps writable: ",
- bdrv_get_node_name(bs));
- }
- }
}
/*
static void qcow2_reopen_commit(BDRVReopenState *state)
{
qcow2_update_options_commit(state->bs, state->opaque);
+ if (state->flags & BDRV_O_RDWR) {
+ Error *local_err = NULL;
+
+ if (qcow2_reopen_bitmaps_rw(state->bs, &local_err) < 0) {
+ /*
+ * This is not fatal, bitmaps just left read-only, so all following
+ * writes will fail. User can remove read-only bitmaps to unblock
+ * writes or retry reopen.
+ */
+ error_reportf_err(local_err,
+ "%s: Failed to make dirty bitmaps writable: ",
+ bdrv_get_node_name(state->bs));
+ }
+ }
g_free(state->opaque);
}
.bdrv_detach_aio_context = qcow2_detach_aio_context,
.bdrv_attach_aio_context = qcow2_attach_aio_context,
- .bdrv_reopen_bitmaps_rw = qcow2_reopen_bitmaps_rw,
.bdrv_co_can_store_new_dirty_bitmap = qcow2_co_can_store_new_dirty_bitmap,
.bdrv_co_remove_persistent_dirty_bitmap =
qcow2_co_remove_persistent_dirty_bitmap,
uint64_t parent_perm, uint64_t parent_shared,
uint64_t *nperm, uint64_t *nshared);
- /**
- * Bitmaps should be marked as 'IN_USE' in the image on reopening image
- * as rw. This handler should realize it. It also should unset readonly
- * field of BlockDirtyBitmap's in case of success.
- */
- int (*bdrv_reopen_bitmaps_rw)(BlockDriverState *bs, Error **errp);
bool (*bdrv_co_can_store_new_dirty_bitmap)(BlockDriverState *bs,
const char *name,
uint32_t granularity,