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 */
22
23 /* Report registered DTrace providers. */
24 static int
sysctl_dtrace_providers(SYSCTL_HANDLER_ARGS)25 sysctl_dtrace_providers(SYSCTL_HANDLER_ARGS)
26 {
27 char *p_name = NULL;
28 dtrace_provider_t
29 *prov = dtrace_provider;
30 int error = 0;
31 size_t len = 0;
32
33 mutex_enter(&dtrace_provider_lock);
34 mutex_enter(&dtrace_lock);
35
36 /* Compute the length of the space-separated provider name string. */
37 while (prov != NULL) {
38 len += strlen(prov->dtpv_name) + 1;
39 prov = prov->dtpv_next;
40 }
41
42 if ((p_name = kmem_alloc(len, KM_SLEEP)) == NULL)
43 error = ENOMEM;
44 else {
45 /* Start with an empty string. */
46 *p_name = '\0';
47
48 /* Point to the first provider again. */
49 prov = dtrace_provider;
50
51 /* Loop through the providers, appending the names. */
52 while (prov != NULL) {
53 if (prov != dtrace_provider)
54 (void) strlcat(p_name, " ", len);
55
56 (void) strlcat(p_name, prov->dtpv_name, len);
57
58 prov = prov->dtpv_next;
59 }
60 }
61
62 mutex_exit(&dtrace_lock);
63 mutex_exit(&dtrace_provider_lock);
64
65 if (p_name != NULL) {
66 error = sysctl_handle_string(oidp, p_name, len, req);
67
68 kmem_free(p_name, 0);
69 }
70
71 return (error);
72 }
73
74 SYSCTL_NODE(_debug, OID_AUTO, dtrace, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
75 "DTrace debug parameters");
76
77 SYSCTL_PROC(_debug_dtrace, OID_AUTO, providers,
78 CTLTYPE_STRING | CTLFLAG_MPSAFE | CTLFLAG_RD, 0, 0, sysctl_dtrace_providers,
79 "A", "available DTrace providers");
80
81 SYSCTL_NODE(_kern, OID_AUTO, dtrace, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
82 "DTrace parameters");
83
84 SYSCTL_INT(_kern_dtrace, OID_AUTO, err_verbose, CTLFLAG_RW,
85 &dtrace_err_verbose, 0,
86 "print DIF and DOF validation errors to the message buffer");
87
88 SYSCTL_INT(_kern_dtrace, OID_AUTO, memstr_max, CTLFLAG_RW, &dtrace_memstr_max,
89 0, "largest allowed argument to memstr(), 0 indicates no limit");
90
91 SYSCTL_QUAD(_kern_dtrace, OID_AUTO, dof_maxsize, CTLFLAG_RW,
92 &dtrace_dof_maxsize, 0, "largest allowed DOF table");
93
94 SYSCTL_QUAD(_kern_dtrace, OID_AUTO, helper_actions_max, CTLFLAG_RW,
95 &dtrace_helper_actions_max, 0, "maximum number of allowed helper actions");
96
97 SYSCTL_INT(_kern_dtrace, OID_AUTO, bufsize_max, CTLFLAG_RWTUN,
98 &dtrace_bufsize_max_frac, 0,
99 "maximum fraction (1/n-th) of physical memory for principal buffers");
100
101 SYSCTL_INT(_security_bsd, OID_AUTO, allow_destructive_dtrace, CTLFLAG_RDTUN,
102 &dtrace_allow_destructive, 1, "Allow destructive mode DTrace scripts");
103