CTB_G2H_BUFFER_SIZE
blob_size = 2 * CTB_DESC_SIZE + CTB_H2G_BUFFER_SIZE + CTB_G2H_BUFFER_SIZE;
cmds_size = CTB_G2H_BUFFER_SIZE;
#define G2H_ROOM_BUFFER_SIZE (CTB_G2H_BUFFER_SIZE / 4)