1/*	$NetBSD: dtrace_sysctl.c,v 1.4 2018/05/28 21:05:03 chs Exp $	*/
2
3/*
4 * CDDL HEADER START
5 *
6 * The contents of this file are subject to the terms of the
7 * Common Development and Distribution License (the "License").
8 * You may not use this file except in compliance with the License.
9 *
10 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
11 * or http://www.opensolaris.org/os/licensing.
12 * See the License for the specific language governing permissions
13 * and limitations under the License.
14 *
15 * When distributing Covered Code, include this CDDL HEADER in each
16 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
17 * If applicable, add the following below this CDDL HEADER, with the
18 * fields enclosed by brackets "[]" replaced with your own identifying
19 * information: Portions Copyright [yyyy] [name of copyright owner]
20 *
21 * CDDL HEADER END
22 *
23 * $FreeBSD: head/sys/cddl/dev/dtrace/dtrace_sysctl.c 309069 2016-11-23 22:50:20Z gnn $
24 *
25 */
26
27#if 0	/* XXX TBD sysctl */
28/* Report registered DTrace providers. */
29static int
30sysctl_dtrace_providers(SYSCTL_HANDLER_ARGS)
31{
32	char	*p_name	= NULL;
33	dtrace_provider_t
34		*prov	= dtrace_provider;
35	int	error	= 0;
36	size_t	len	= 0;
37
38	mutex_enter(&dtrace_provider_lock);
39	mutex_enter(&dtrace_lock);
40
41	/* Compute the length of the space-separated provider name string. */
42	while (prov != NULL) {
43		len += strlen(prov->dtpv_name) + 1;
44		prov = prov->dtpv_next;
45	}
46
47	if ((p_name = kmem_alloc(len, KM_SLEEP)) == NULL)
48		error = ENOMEM;
49	else {
50		/* Start with an empty string. */
51		*p_name = '\0';
52
53		/* Point to the first provider again. */
54		prov = dtrace_provider;
55
56		/* Loop through the providers, appending the names. */
57		while (prov != NULL) {
58			if (prov != dtrace_provider)
59				(void) strlcat(p_name, " ", len);
60
61			(void) strlcat(p_name, prov->dtpv_name, len);
62
63			prov = prov->dtpv_next;
64		}
65	}
66
67	mutex_exit(&dtrace_lock);
68	mutex_exit(&dtrace_provider_lock);
69
70	if (p_name != NULL) {
71		error = sysctl_handle_string(oidp, p_name, len, req);
72
73		kmem_free(p_name, len);
74	}
75
76	return (error);
77}
78
79SYSCTL_NODE(_debug, OID_AUTO, dtrace, CTLFLAG_RD, 0, "DTrace debug parameters");
80
81SYSCTL_PROC(_debug_dtrace, OID_AUTO, providers, CTLTYPE_STRING | CTLFLAG_RD,
82    0, 0, sysctl_dtrace_providers, "A", "available DTrace providers");
83
84SYSCTL_NODE(_kern, OID_AUTO, dtrace, CTLFLAG_RD, 0, "DTrace parameters");
85
86SYSCTL_INT(_kern_dtrace, OID_AUTO, err_verbose, CTLFLAG_RW,
87    &dtrace_err_verbose, 0,
88    "print DIF and DOF validation errors to the message buffer");
89
90SYSCTL_INT(_kern_dtrace, OID_AUTO, memstr_max, CTLFLAG_RW, &dtrace_memstr_max,
91    0, "largest allowed argument to memstr(), 0 indicates no limit");
92
93SYSCTL_QUAD(_kern_dtrace, OID_AUTO, dof_maxsize, CTLFLAG_RW,
94    &dtrace_dof_maxsize, 0, "largest allowed DOF table");
95
96SYSCTL_QUAD(_kern_dtrace, OID_AUTO, helper_actions_max, CTLFLAG_RW,
97    &dtrace_helper_actions_max, 0, "maximum number of allowed helper actions");
98
99SYSCTL_INT(_security_bsd, OID_AUTO, allow_destructive_dtrace, CTLFLAG_RDTUN,
100    &dtrace_allow_destructive, 1, "Allow destructive mode DTrace scripts");
101
102#endif
103