dtrace_cddl.h revision 179237 
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: head/sys/cddl/dev/dtrace/dtrace_cddl.h 179237 2008-05-23 05:59:42Z jb $
22 *
23 */
24
25#ifndef _DTRACE_CDDL_H_
26#define	_DTRACE_CDDL_H_
27
28#include <sys/proc.h>
29
30#define LOCK_LEVEL	10
31
32/*
33 * Kernel DTrace extension to 'struct proc' for FreeBSD.
34 */
35typedef struct kdtrace_proc {
36	int		p_dtrace_probes;	/* Are there probes for this proc? */
37	u_int64_t	p_dtrace_count;		/* Number of DTrace tracepoints */
38	void		*p_dtrace_helpers;	/* DTrace helpers, if any */
39
40} kdtrace_proc_t;
41
42/*
43 * Kernel DTrace extension to 'struct thread' for FreeBSD.
44 */
45typedef struct kdtrace_thread {
46	u_int8_t	td_dtrace_stop;	/* Indicates a DTrace-desired stop */
47	u_int8_t	td_dtrace_sig;	/* Signal sent via DTrace's raise() */
48	u_int		td_predcache;	/* DTrace predicate cache */
49	u_int64_t	td_dtrace_vtime; /* DTrace virtual time */
50	u_int64_t	td_dtrace_start; /* DTrace slice start time */
51
52	union __tdu {
53		struct __tds {
54			u_int8_t	_td_dtrace_on;
55					/* Hit a fasttrap tracepoint. */
56			u_int8_t	_td_dtrace_step;
57					/* About to return to kernel. */
58			u_int8_t	_td_dtrace_ret;
59					/* Handling a return probe. */
60			u_int8_t	_td_dtrace_ast;
61					/* Saved ast flag. */
62		} _tds;
63		u_long	_td_dtrace_ft;	/* Bitwise or of these flags. */
64	} _tdu;
65#define	td_dtrace_ft	_tdu._td_dtrace_ft
66#define	td_dtrace_on	_tdu._tds._td_dtrace_on
67#define	td_dtrace_step	_tdu._tds._td_dtrace_step
68#define	td_dtrace_ret	_tdu._tds._td_dtrace_ret
69#define	td_dtrace_ast	_tdu._tds._td_dtrace_ast
70
71	uintptr_t	td_dtrace_pc;	/* DTrace saved pc from fasttrap. */
72	uintptr_t	td_dtrace_npc;	/* DTrace next pc from fasttrap. */
73	uintptr_t	td_dtrace_scrpc;
74					/* DTrace per-thread scratch location. */
75	uintptr_t	td_dtrace_astpc;
76					/* DTrace return sequence location. */
77	u_int64_t	td_hrtime;	/* Last time on cpu. */
78	int		td_errno;	/* Syscall return value. */
79} kdtrace_thread_t;
80
81/*
82 * Definitions to reference fields in the FreeBSD DTrace structures defined
83 * above using the names of fields in similar structures in Solaris. Note
84 * that the separation on FreeBSD is a licensing constraint designed to
85 * keep the GENERIC kernel BSD licensed.
86 */
87#define	t_dtrace_vtime	td_dtrace->td_dtrace_vtime
88#define	t_dtrace_start	td_dtrace->td_dtrace_start
89#define	t_dtrace_stop	td_dtrace->td_dtrace_stop
90#define	t_dtrace_sig	td_dtrace->td_dtrace_sig
91#define	t_predcache	td_dtrace->td_predcache
92#define p_dtrace_helpers	p_dtrace->p_dtrace_helpers
93
94/*
95 * Definitions for fields in struct proc which are named differntly in FreeBSD.
96 */
97#define	p_cred		p_ucred
98#define	p_parent	p_pptr
99
100/*
101 * Definitions for fields in struct thread which are named differntly in FreeBSD.
102 */
103#define	t_procp		td_proc
104#define	t_tid		td_tid
105#define	t_did		td_tid
106
107
108int priv_policy(const cred_t *, int, boolean_t, int, const char *);
109boolean_t priv_policy_only(const cred_t *, int, boolean_t);
110boolean_t priv_policy_choice(const cred_t *, int, boolean_t);
111
112/*
113 * Test privilege. Audit success or failure, allow privilege debugging.
114 * Returns 0 for success, err for failure.
115 */
116#define	PRIV_POLICY(cred, priv, all, err, reason) \
117		priv_policy((cred), (priv), (all), (err), (reason))
118
119/*
120 * Test privilege. Audit success only, no privilege debugging.
121 * Returns 1 for success, and 0 for failure.
122 */
123#define	PRIV_POLICY_CHOICE(cred, priv, all) \
124		priv_policy_choice((cred), (priv), (all))
125
126/*
127 * Test privilege. No priv_debugging, no auditing.
128 * Returns 1 for success, and 0 for failure.
129 */
130
131#define	PRIV_POLICY_ONLY(cred, priv, all) \
132		priv_policy_only((cred), (priv), (all))
133
134#endif	/* !_DTRACE_CDDL_H_ */
135