void bdrv_reopen_commit(BDRVReopenState *reopen_state)
{
BlockDriver *drv;
+ BlockDriverState *bs;
+ bool old_can_write, new_can_write;
assert(reopen_state != NULL);
- drv = reopen_state->bs->drv;
+ 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);
}
/* set BDS specific flags now */
- QDECREF(reopen_state->bs->explicit_options);
+ QDECREF(bs->explicit_options);
+
+ bs->explicit_options = reopen_state->explicit_options;
+ bs->open_flags = reopen_state->flags;
+ bs->read_only = !(reopen_state->flags & BDRV_O_RDWR);
- reopen_state->bs->explicit_options = reopen_state->explicit_options;
- reopen_state->bs->open_flags = reopen_state->flags;
- reopen_state->bs->read_only = !(reopen_state->flags & BDRV_O_RDWR);
+ bdrv_refresh_limits(bs, NULL);
- bdrv_refresh_limits(reopen_state->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));
+ }
+ }
}
/*
bdrv_flush(bs);
bdrv_drain(bs); /* in case flush left pending I/O */
- bdrv_release_named_dirty_bitmaps(bs);
- assert(QLIST_EMPTY(&bs->dirty_bitmaps));
-
if (bs->drv) {
BdrvChild *child, *next;
bs->full_open_options = NULL;
}
+ bdrv_release_named_dirty_bitmaps(bs);
+ assert(QLIST_EMPTY(&bs->dirty_bitmaps));
+
QLIST_FOREACH_SAFE(ban, &bs->aio_notifiers, list, ban_next) {
g_free(ban);
}
/**
* Truncate file to 'offset' bytes (needed only for file protocols)
*/
-int bdrv_truncate(BdrvChild *child, int64_t offset, Error **errp)
+int bdrv_truncate(BdrvChild *child, int64_t offset, PreallocMode prealloc,
+ Error **errp)
{
BlockDriverState *bs = child->bs;
BlockDriver *drv = bs->drv;
assert(!(bs->open_flags & BDRV_O_INACTIVE));
- ret = drv->bdrv_truncate(bs, offset, errp);
+ ret = drv->bdrv_truncate(bs, offset, prealloc, errp);
if (ret == 0) {
ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);
bdrv_dirty_bitmap_truncate(bs);
return -ENOTSUP;
}
+/*
+ * bdrv_measure:
+ * @drv: Format driver
+ * @opts: Creation options for new image
+ * @in_bs: Existing image containing data for new image (may be NULL)
+ * @errp: Error object
+ * Returns: A #BlockMeasureInfo (free using qapi_free_BlockMeasureInfo())
+ * or NULL on error
+ *
+ * Calculate file size required to create a new image.
+ *
+ * If @in_bs is given then space for allocated clusters and zero clusters
+ * from that image are included in the calculation. If @opts contains a
+ * backing file that is shared by @in_bs then backing clusters may be omitted
+ * from the calculation.
+ *
+ * If @in_bs is NULL then the calculation includes no allocated clusters
+ * unless a preallocation option is given in @opts.
+ *
+ * Note that @in_bs may use a different BlockDriver from @drv.
+ *
+ * If an error occurs the @errp pointer is set.
+ */
+BlockMeasureInfo *bdrv_measure(BlockDriver *drv, QemuOpts *opts,
+ BlockDriverState *in_bs, Error **errp)
+{
+ if (!drv->bdrv_measure) {
+ error_setg(errp, "Block driver '%s' does not support size measurement",
+ drv->format_name);
+ return NULL;
+ }
+
+ return drv->bdrv_measure(opts, in_bs, errp);
+}
+
/**
* Return number of sectors on success, -errno on error.
*/
}
}
+ /* At this point persistent bitmaps should be already stored by the format
+ * driver */
+ bdrv_release_persistent_dirty_bitmaps(bs);
+
return 0;
}
assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX);
if (!QLIST_EMPTY(&bs->op_blockers[op])) {
blocker = QLIST_FIRST(&bs->op_blockers[op]);
- if (errp) {
- *errp = error_copy(blocker->reason);
- error_prepend(errp, "Node '%s' is busy: ",
- bdrv_get_device_or_node_name(bs));
- }
+ error_propagate(errp, error_copy(blocker->reason));
+ error_prepend(errp, "Node '%s' is busy: ",
+ bdrv_get_device_or_node_name(bs));
return true;
}
return false;
parent_bs->drv->bdrv_del_child(parent_bs, child, errp);
}
+
+bool bdrv_can_store_new_dirty_bitmap(BlockDriverState *bs, const char *name,
+ uint32_t granularity, Error **errp)
+{
+ BlockDriver *drv = bs->drv;
+
+ if (!drv) {
+ error_setg_errno(errp, ENOMEDIUM,
+ "Can't store persistent bitmaps to %s",
+ bdrv_get_device_or_node_name(bs));
+ return false;
+ }
+
+ if (!drv->bdrv_can_store_new_dirty_bitmap) {
+ error_setg_errno(errp, ENOTSUP,
+ "Can't store persistent bitmaps to %s",
+ bdrv_get_device_or_node_name(bs));
+ return false;
+ }
+
+ return drv->bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp);
+}
projects / thirdparty / qemu.git / blobdiff