1 /*
2 * This file is freeware. You are free to use it and add your own
3 * license.
4 *
5 */
6
7 #include <sys/cdefs.h>
8 #include <sys/param.h>
9 #include <sys/systm.h>
10 #include <sys/conf.h>
11 #include <sys/kernel.h>
12 #include <sys/module.h>
13
14 #include <sys/dtrace.h>
15
16 static d_open_t prototype_open;
17 static int prototype_unload(void);
18 static void prototype_getargdesc(void *, dtrace_id_t, void *, dtrace_argdesc_t *);
19 static void prototype_provide(void *, dtrace_probedesc_t *);
20 static void prototype_destroy(void *, dtrace_id_t, void *);
21 static void prototype_enable(void *, dtrace_id_t, void *);
22 static void prototype_disable(void *, dtrace_id_t, void *);
23 static void prototype_load(void *);
24
25 static struct cdevsw prototype_cdevsw = {
26 .d_version = D_VERSION,
27 .d_open = prototype_open,
28 .d_name = "prototype",
29 };
30
31 static dtrace_pattr_t prototype_attr = {
32 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
33 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
34 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
35 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
36 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
37 };
38
39 static dtrace_pops_t prototype_pops = {
40 .dtps_provide = prototype_provide,
41 .dtps_provide_module = NULL,
42 .dtps_enable = prototype_enable,
43 .dtps_disable = prototype_disable,
44 .dtps_suspend = NULL,
45 .dtps_resume = NULL,
46 .dtps_getargdesc = prototype_getargdesc,
47 .dtps_getargval = NULL,
48 .dtps_usermode = NULL,
49 .dtps_destroy = prototype_destroy
50 };
51
52 static struct cdev *prototype_cdev;
53 static dtrace_provider_id_t prototype_id;
54
55 static void
prototype_getargdesc(void * arg,dtrace_id_t id,void * parg,dtrace_argdesc_t * desc)56 prototype_getargdesc(void *arg, dtrace_id_t id, void *parg, dtrace_argdesc_t *desc)
57 {
58 }
59
60 static void
prototype_provide(void * arg,dtrace_probedesc_t * desc)61 prototype_provide(void *arg, dtrace_probedesc_t *desc)
62 {
63 }
64
65 static void
prototype_destroy(void * arg,dtrace_id_t id,void * parg)66 prototype_destroy(void *arg, dtrace_id_t id, void *parg)
67 {
68 }
69
70 static void
prototype_enable(void * arg,dtrace_id_t id,void * parg)71 prototype_enable(void *arg, dtrace_id_t id, void *parg)
72 {
73 }
74
75 static void
prototype_disable(void * arg,dtrace_id_t id,void * parg)76 prototype_disable(void *arg, dtrace_id_t id, void *parg)
77 {
78 }
79
80 static void
prototype_load(void * dummy)81 prototype_load(void *dummy)
82 {
83 /*
84 * Create the /dev/dtrace/prototype entry.
85 * XXX: Remove this if the provider does not need any customs ioctls.
86 */
87 prototype_cdev = make_dev(&prototype_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
88 "dtrace/prototype");
89
90 if (dtrace_register("prototype", &prototype_attr, DTRACE_PRIV_USER,
91 NULL, &prototype_pops, NULL, &prototype_id) != 0)
92 return;
93 }
94
95
96 static int
prototype_unload(void)97 prototype_unload(void)
98 {
99 int error = 0;
100
101 if ((error = dtrace_unregister(prototype_id)) != 0)
102 return (error);
103
104 destroy_dev(prototype_cdev);
105
106 return (error);
107 }
108
109 static int
prototype_modevent(module_t mod __unused,int type,void * data __unused)110 prototype_modevent(module_t mod __unused, int type, void *data __unused)
111 {
112 int error = 0;
113
114 switch (type) {
115 case MOD_LOAD:
116 break;
117
118 case MOD_UNLOAD:
119 break;
120
121 case MOD_SHUTDOWN:
122 break;
123
124 default:
125 error = EOPNOTSUPP;
126 break;
127
128 }
129
130 return (error);
131 }
132
133 static int
prototype_open(struct cdev * dev __unused,int oflags __unused,int devtype __unused,struct thread * td __unused)134 prototype_open(struct cdev *dev __unused, int oflags __unused, int devtype __unused, struct thread *td __unused)
135 {
136 return (0);
137 }
138
139 SYSINIT(prototype_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, prototype_load, NULL);
140 SYSUNINIT(prototype_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, prototype_unload, NULL);
141
142 DEV_MODULE(prototype, prototype_modevent, NULL);
143 MODULE_VERSION(prototype, 1);
144 MODULE_DEPEND(prototype, dtrace, 1, 1, 1);
145 MODULE_DEPEND(prototype, opensolaris, 1, 1, 1);
146