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      1 /*	$NetBSD: if_module.h,v 1.1 2016/08/07 17:38:34 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifdef _MODULE
     30 # define IF_MODULE_CFDRIVER_DECL(name) CFDRIVER_DECL(name, DV_IFNET, NULL)
     31 # define IF_MODULE_CFDRIVER_ATTACH(name)			\
     32     error = config_cfdriver_attach(& name ## _cd);		\
     33     if (error) {						\
     34 	    aprint_error("%s: unable to register cfdriver for"	\
     35 		"%s, error %d\n", __func__, name ## _cd.cd_name,\
     36 		error);						\
     37 	    break;						\
     38     }
     39 # define IF_MODULE_CFDRIVER_DETACH(name)			\
     40     /* Remove device from autoconf database */			\
     41     error = config_cfdriver_detach(&name ## _cd);		\
     42     if (error) {						\
     43 	    aprint_error("%s: failed to detach %s cfdriver, "	\
     44 		"error %d\n", __func__, name ## _cd.cd_name,	\
     45 		error);						\
     46 	    break;						\
     47     }
     48 #else
     49 # define IF_MODULE_CFDRIVER_DECL(name)
     50 # define IF_MODULE_CFDRIVER_ATTACH(name)
     51 # define IF_MODULE_CFDRIVER_DETACH(name)
     52 #endif
     53 
     54 #define IF_MODULE(class, name, dep)				\
     55 MODULE(class, if_ ## name, dep);				\
     56 IF_MODULE_CFDRIVER_DECL(name);					\
     57 static int							\
     58 if_ ## name ## _modcmd(modcmd_t cmd, void *arg)			\
     59 {								\
     60 	int error = 0;						\
     61 								\
     62 	switch (cmd) {						\
     63 	case MODULE_CMD_INIT:					\
     64 		IF_MODULE_CFDRIVER_ATTACH(name)			\
     65 		/* Init the unit list/line discipline stuff */	\
     66 		name ## init();					\
     67 		break;						\
     68 								\
     69 	case MODULE_CMD_FINI:					\
     70 		/*						\
     71 		 * Make sure it's ok to detach - no units left,	\
     72 		 * and line discipline is removed		\
     73 		 */						\
     74 		error = name ## detach();			\
     75 		if (error != 0)					\
     76 			break;					\
     77 		IF_MODULE_CFDRIVER_DETACH(name)			\
     78 		break;						\
     79 								\
     80 	case MODULE_CMD_STAT:					\
     81 		error = ENOTTY;					\
     82 		break;						\
     83 	default:						\
     84 		error = ENOTTY;					\
     85 		break;						\
     86 	}							\
     87 								\
     88 	return error;						\
     89 }
     90