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