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/*-
* Copyright (C) 2006 John Birrell <jb@freebsd.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice(s), this list of conditions and the following disclaimer as
* the first lines of this file unmodified other than the possible
* addition of one or more copyright notices.
* 2. Redistributions in binary form must reproduce the above copyright
* notice(s), this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/cddl/dev/dtrace/dtrace_clone.c 183381 2008-09-26 14:19:52Z ed $
*
*/
static void
dtrace_clone(void *arg, struct ucred *cred, char *name, int namelen, struct cdev **dev)
{
int u = -1;
size_t len;
if (*dev != NULL)
return;
len = strlen(name);
if (len != 6 && len != 13)
return;
if (bcmp(name,"dtrace",6) != 0)
return;
if (len == 13 && bcmp(name,"dtrace/dtrace",13) != 0)
return;
/* Clone the device to the new minor number. */
if (clone_create(&dtrace_clones, &dtrace_cdevsw, &u, dev, 0) != 0)
/* Create the /dev/dtrace/dtraceNN entry. */
*dev = make_dev_cred(&dtrace_cdevsw, u, cred,
UID_ROOT, GID_WHEEL, 0600, "dtrace/dtrace%d", u);
if (*dev != NULL) {
dev_ref(*dev);
(*dev)->si_flags |= SI_CHEAPCLONE;
}
}