1 /*
2 * This file is freeware. You are free to use it and add your own
3 * license.
4 *
5 */
6
7 #include <sys/param.h>
8 #include <sys/systm.h>
9 #include <sys/conf.h>
10 #include <sys/kernel.h>
11 #include <sys/module.h>
12
13 #include <sys/dtrace.h>
14
15 static d_open_t prototype_open;
16 static int prototype_unload(void);
17 static void prototype_getargdesc(void *, dtrace_id_t, void *, dtrace_argdesc_t *);
18 static void prototype_provide(void *, dtrace_probedesc_t *);
19 static void prototype_destroy(void *, dtrace_id_t, void *);
20 static void prototype_enable(void *, dtrace_id_t, void *);
21 static void prototype_disable(void *, dtrace_id_t, void *);
22 static void prototype_load(void *);
23
24 static struct cdevsw prototype_cdevsw = {
25 .d_version = D_VERSION,
26 .d_open = prototype_open,
27 .d_name = "prototype",
28 };
29
30 static dtrace_pattr_t prototype_attr = {
31 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
32 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
33 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
34 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
35 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
36 };
37
38 static dtrace_pops_t prototype_pops = {
39 .dtps_provide = prototype_provide,
40 .dtps_provide_module = NULL,
41 .dtps_enable = prototype_enable,
42 .dtps_disable = prototype_disable,
43 .dtps_suspend = NULL,
44 .dtps_resume = NULL,
45 .dtps_getargdesc = prototype_getargdesc,
46 .dtps_getargval = NULL,
47 .dtps_usermode = NULL,
48 .dtps_destroy = prototype_destroy
49 };
50
51 static struct cdev *prototype_cdev;
52 static dtrace_provider_id_t prototype_id;
53
54 static void
prototype_getargdesc(void * arg,dtrace_id_t id,void * parg,dtrace_argdesc_t * desc)55 prototype_getargdesc(void *arg, dtrace_id_t id, void *parg, dtrace_argdesc_t *desc)
56 {
57 }
58
59 static void
prototype_provide(void * arg,dtrace_probedesc_t * desc)60 prototype_provide(void *arg, dtrace_probedesc_t *desc)
61 {
62 }
63
64 static void
prototype_destroy(void * arg,dtrace_id_t id,void * parg)65 prototype_destroy(void *arg, dtrace_id_t id, void *parg)
66 {
67 }
68
69 static void
prototype_enable(void * arg,dtrace_id_t id,void * parg)70 prototype_enable(void *arg, dtrace_id_t id, void *parg)
71 {
72 }
73
74 static void
prototype_disable(void * arg,dtrace_id_t id,void * parg)75 prototype_disable(void *arg, dtrace_id_t id, void *parg)
76 {
77 }
78
79 static void
prototype_load(void * dummy)80 prototype_load(void *dummy)
81 {
82 /*
83 * Create the /dev/dtrace/prototype entry.
84 * XXX: Remove this if the provider does not need any customs ioctls.
85 */
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
prototype_unload(void)96 prototype_unload(void)
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
prototype_modevent(module_t mod __unused,int type,void * data __unused)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
prototype_open(struct cdev * dev __unused,int oflags __unused,int devtype __unused,struct thread * td __unused)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