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compat_sysv_50_mod.c revision 1.1.2.2 
      1 /*	$NetBSD: compat_sysv_50_mod.c,v 1.1.2.2 2018/10/15 22:06:16 pgoyette Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software developed for The NetBSD Foundation
      8  * by Paul Goyette
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: compat_sysv_50_mod.c,v 1.1.2.2 2018/10/15 22:06:16 pgoyette Exp $");
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_compat_netbsd.h"
     37 #include "opt_sysv.h"
     38 #endif
     39 
     40 #include <sys/systm.h>
     41 #include <sys/module.h>
     42 #include <sys/syscall.h>
     43 #include <sys/syscallargs.h>
     44 #include <sys/syscallvar.h>
     45 #include <sys/sysctl.h>
     46 #include <sys/compat_stub.h>
     47 
     48 #include <compat/common/compat_sysv_mod.h>
     49 
     50 MODULE(MODULE_CLASS_EXEC, compat_sysv_50, "sysv_ipc");
     51 
     52 /* Build the syscall package based on options specified */
     53 
     54 static const struct syscall_package compat_sysv_50_syscalls[] = {
     55 #ifdef SYSVSHM
     56 	{ SYS_compat_50___shmctl13, 0, (sy_call_t *)compat_50_sys___shmctl13 },
     57 #endif
     58 #ifdef	SYSVSEM
     59 	{ SYS_compat_50_____semctl13, 0, (sy_call_t *)compat_50_sys_____semctl13 },
     60 #endif
     61 #ifdef	SYSVMSG
     62 	{ SYS_compat_50___msgctl13, 0, (sy_call_t *)compat_50_sys___msgctl13 },
     63 #endif
     64 	{ 0, 0, NULL }
     65 };
     66 
     67 MODULE_SET_HOOK(sysvipc50_sysctl_hook, "sysv50", sysctl_kern_sysvipc50);
     68 MODULE_UNSET_HOOK(sysvipc50_sysctl_hook);
     69 
     70 static int
     71 compat_sysv_50_modcmd(modcmd_t cmd, void *arg)
     72 {
     73 	int error = 0;
     74 
     75 	switch (cmd) {
     76 	case MODULE_CMD_INIT:
     77 		error = syscall_establish(NULL, compat_sysv_50_syscalls);
     78 		if (error != 0) {
     79 			break;
     80 		}
     81 		sysvipc50_sysctl_hook_set();
     82 		break;
     83 
     84 	case MODULE_CMD_FINI:
     85 		error = syscall_disestablish(NULL, compat_sysv_50_syscalls);
     86 		if (error != 0) {
     87 			break;
     88 		}
     89 		sysvipc50_sysctl_hook_unset();
     90 		break;
     91 
     92 	default:
     93 		error = ENOTTY;
     94 		break;
     95 	}
     96 	return error;
     97 }
     98