1 /*
2 * This file is freeware. You are free to use it and add your own
3 * license.
4 *
5 * $FreeBSD: src/sys/cddl/dev/prototype.c,v 1.1 2008/05/23 05:59:40 jb Exp $
6 *
7 */
8
9 #include <sys/cdefs.h>
10 #include <sys/param.h>
11 #include <sys/systm.h>
12 #include <sys/conf.h>
13 #include <sys/kernel.h>
14 #include <sys/module.h>
15
16 #include <sys/dtrace.h>
17
18 static d_open_t prototype_open;
19 static int prototype_unload(void);
20 static void prototype_getargdesc(void *, dtrace_id_t, void *, dtrace_argdesc_t *);
21 static void prototype_provide(void *, dtrace_probedesc_t *);
22 static void prototype_destroy(void *, dtrace_id_t, void *);
23 static void prototype_enable(void *, dtrace_id_t, void *);
24 static void prototype_disable(void *, dtrace_id_t, void *);
25 static void prototype_load(void *);
26
27 static struct cdevsw prototype_cdevsw = {
28 .d_version = D_VERSION,
29 .d_open = prototype_open,
30 .d_name = "prototype",
31 };
32
33 static dtrace_pattr_t prototype_attr = {
34 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
35 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
36 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
37 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
38 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
39 };
40
41 static dtrace_pops_t prototype_pops = {
42 prototype_provide,
43 NULL,
44 prototype_enable,
45 prototype_disable,
46 NULL,
47 NULL,
48 prototype_getargdesc,
49 NULL,
50 NULL,
51 prototype_destroy
52 };
53
54 static struct cdev *prototype_cdev;
55 static dtrace_provider_id_t prototype_id;
56
57 static void
58 prototype_getargdesc(void *arg, dtrace_id_t id, void *parg, dtrace_argdesc_t *desc)
59 {
60 }
61
62 static void
63 prototype_provide(void *arg, dtrace_probedesc_t *desc)
64 {
65 }
66
67 static void
68 prototype_destroy(void *arg, dtrace_id_t id, void *parg)
69 {
70 }
71
72 static void
73 prototype_enable(void *arg, dtrace_id_t id, void *parg)
74 {
75 }
76
77 static void
78 prototype_disable(void *arg, dtrace_id_t id, void *parg)
79 {
80 }
81
82 static void
83 prototype_load(void *dummy)
84 {
85 /* Create the /dev/dtrace/prototype entry. */
86 prototype_cdev = make_dev(&prototype_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
87 "dtrace/prototype");
88
89 if (dtrace_register("prototype", &prototype_attr, DTRACE_PRIV_USER,
90 NULL, &prototype_pops, NULL, &prototype_id) != 0)
91 return;
92 }
93
94
95 static int
96 prototype_unload()
97 {
98 int error = 0;
99
100 if ((error = dtrace_unregister(prototype_id)) != 0)
101 return (error);
102
103 destroy_dev(prototype_cdev);
104
105 return (error);
106 }
107
108 static int
109 prototype_modevent(module_t mod __unused, int type, void *data __unused)
110 {
111 int error = 0;
112
113 switch (type) {
114 case MOD_LOAD:
115 break;
116
117 case MOD_UNLOAD:
118 break;
119
120 case MOD_SHUTDOWN:
121 break;
122
123 default:
124 error = EOPNOTSUPP;
125 break;
126
127 }
128
129 return (error);
130 }
131
132 static int
133 prototype_open(struct cdev *dev __unused, int oflags __unused, int devtype __unused, struct thread *td __unused)
134 {
135 return (0);
136 }
137
138 SYSINIT(prototype_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, prototype_load, NULL);
139 SYSUNINIT(prototype_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, prototype_unload, NULL);
140
141 DEV_MODULE(prototype, prototype_modevent, NULL);
142 MODULE_VERSION(prototype, 1);
143 MODULE_DEPEND(prototype, dtrace, 1, 1, 1);
144 MODULE_DEPEND(prototype, opensolaris, 1, 1, 1);
145 Cache object: af91ba898208ecceb5874443e19149a2
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