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/* $NetBSD: dtrace_modevent.c,v 1.7 2022/03/28 12:33:20 riastradh Exp $ */
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD: head/sys/cddl/dev/dtrace/dtrace_load.c 309069 2016-11-23 22:50:20Z gnn $
*
*/
/* ARGSUSED */
static int
dtrace_modcmd(modcmd_t cmd, void *data)
{
int bmajor = -1, cmajor = -1;
int error;
switch (cmd) {
case MODULE_CMD_INIT:
dtrace_load(NULL);
error = devsw_attach("dtrace", NULL, &bmajor,
&dtrace_cdevsw, &cmajor);
if (error != 0)
if (dtrace_unload() != 0)
panic("failed to unload dtrace");
return error;
case MODULE_CMD_FINI:
devsw_detach(NULL, &dtrace_cdevsw);
error = dtrace_unload();
if (error != 0) {
if (devsw_attach("dtrace", NULL, &bmajor,
&dtrace_cdevsw, &cmajor) != 0)
panic("failed to reattach dtrace_devsw");
}
return error;
case MODULE_CMD_AUTOUNLOAD:
return EBUSY;
default:
return ENOTTY;
}
}
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