ggated: zle als "Hole punching"-Ersatz

--- a/sbin/ggate/ggated/ggated.c
+++ b/sbin/ggate/ggated/ggated.c
[...]
@@ -778,9 +804,16 @@ disk_thread(void *arg)
        [...]
        case GGATE_CMD_READ:
                [...]
                data = pread(fd, req->r_data, req->r_length,
                    req->r_offset);
                break;
+       case GGATE_CMD_DELETE:
+               data = delete_range(fd, req->r_length,
+                   req->r_offset);
+               assert(data <= req->r_length);
+               break;
        case GGATE_CMD_WRITE:
                data = pwrite(fd, req->r_data, req->r_length,
                    req->r_offset);