void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr)
{
- bdrv_get_geometry(blk->bs, nb_sectors_ptr);
+ if (!blk->bs) {
+ *nb_sectors_ptr = 0;
+ } else {
+ bdrv_get_geometry(blk->bs, nb_sectors_ptr);
+ }
}
int64_t blk_nb_sectors(BlockBackend *blk)
void blk_drain(BlockBackend *blk)
{
- bdrv_drain(blk->bs);
+ if (blk->bs) {
+ bdrv_drain(blk->bs);
+ }
}
void blk_drain_all(void)
int blk_is_sg(BlockBackend *blk)
{
+ if (!blk->bs) {
+ return 0;
+ }
+
return bdrv_is_sg(blk->bs);
}
void blk_lock_medium(BlockBackend *blk, bool locked)
{
- bdrv_lock_medium(blk->bs, locked);
+ if (blk->bs) {
+ bdrv_lock_medium(blk->bs, locked);
+ }
}
void blk_eject(BlockBackend *blk, bool eject_flag)
{
- bdrv_eject(blk->bs, eject_flag);
+ if (blk->bs) {
+ bdrv_eject(blk->bs, eject_flag);
+ }
}
int blk_get_flags(BlockBackend *blk)
int blk_get_max_transfer_length(BlockBackend *blk)
{
- return blk->bs->bl.max_transfer_length;
+ if (blk->bs) {
+ return blk->bs->bl.max_transfer_length;
+ } else {
+ return 0;
+ }
}
void blk_set_guest_block_size(BlockBackend *blk, int align)
bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp)
{
+ if (!blk->bs) {
+ return false;
+ }
+
return bdrv_op_is_blocked(blk->bs, op, errp);
}
void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason)
{
- bdrv_op_unblock(blk->bs, op, reason);
+ if (blk->bs) {
+ bdrv_op_unblock(blk->bs, op, reason);
+ }
}
void blk_op_block_all(BlockBackend *blk, Error *reason)
{
- bdrv_op_block_all(blk->bs, reason);
+ if (blk->bs) {
+ bdrv_op_block_all(blk->bs, reason);
+ }
}
void blk_op_unblock_all(BlockBackend *blk, Error *reason)
{
- bdrv_op_unblock_all(blk->bs, reason);
+ if (blk->bs) {
+ bdrv_op_unblock_all(blk->bs, reason);
+ }
}
AioContext *blk_get_aio_context(BlockBackend *blk)
void blk_set_aio_context(BlockBackend *blk, AioContext *new_context)
{
- bdrv_set_aio_context(blk->bs, new_context);
+ if (blk->bs) {
+ bdrv_set_aio_context(blk->bs, new_context);
+ }
}
void blk_add_aio_context_notifier(BlockBackend *blk,
void (*attached_aio_context)(AioContext *new_context, void *opaque),
void (*detach_aio_context)(void *opaque), void *opaque)
{
- bdrv_add_aio_context_notifier(blk->bs, attached_aio_context,
- detach_aio_context, opaque);
+ if (blk->bs) {
+ bdrv_add_aio_context_notifier(blk->bs, attached_aio_context,
+ detach_aio_context, opaque);
+ }
}
void blk_remove_aio_context_notifier(BlockBackend *blk,
void (*detach_aio_context)(void *),
void *opaque)
{
- bdrv_remove_aio_context_notifier(blk->bs, attached_aio_context,
- detach_aio_context, opaque);
+ if (blk->bs) {
+ bdrv_remove_aio_context_notifier(blk->bs, attached_aio_context,
+ detach_aio_context, opaque);
+ }
}
void blk_add_close_notifier(BlockBackend *blk, Notifier *notify)
{
- bdrv_add_close_notifier(blk->bs, notify);
+ if (blk->bs) {
+ bdrv_add_close_notifier(blk->bs, notify);
+ }
}
void blk_io_plug(BlockBackend *blk)
{
- bdrv_io_plug(blk->bs);
+ if (blk->bs) {
+ bdrv_io_plug(blk->bs);
+ }
}
void blk_io_unplug(BlockBackend *blk)
{
- bdrv_io_unplug(blk->bs);
+ if (blk->bs) {
+ bdrv_io_unplug(blk->bs);
+ }
}
BlockAcctStats *blk_get_stats(BlockBackend *blk)