2 * Copyright (C) 2019 Jonathan Rajotte
3 * <jonathan.rajotte-julien@efficios.com>
5 * SPDX-License-Identifier: LGPL-2.1-only
10 #include <common/error.h>
11 #include <common/macros.h>
12 #include <common/payload.h>
13 #include <common/payload-view.h>
14 #include <lttng/event-rule/event-rule-internal.h>
15 #include <lttng/event-rule/kprobe-internal.h>
16 #include <lttng/event-rule/syscall-internal.h>
19 enum lttng_event_rule_type
lttng_event_rule_get_type(
20 const struct lttng_event_rule
*event_rule
)
22 return event_rule
? event_rule
->type
: LTTNG_EVENT_RULE_TYPE_UNKNOWN
;
26 enum lttng_domain_type
lttng_event_rule_get_domain_type(
27 const struct lttng_event_rule
*event_rule
)
29 enum lttng_domain_type domain_type
= LTTNG_DOMAIN_NONE
;
31 switch (lttng_event_rule_get_type(event_rule
)) {
32 case LTTNG_EVENT_RULE_TYPE_TRACEPOINT
:
34 domain_type
= LTTNG_DOMAIN_NONE
;
36 case LTTNG_EVENT_RULE_TYPE_SYSCALL
:
37 case LTTNG_EVENT_RULE_TYPE_KPROBE
:
38 case LTTNG_EVENT_RULE_TYPE_KRETPROBE
:
39 case LTTNG_EVENT_RULE_TYPE_UPROBE
:
40 domain_type
= LTTNG_DOMAIN_KERNEL
;
42 case LTTNG_EVENT_RULE_TYPE_UNKNOWN
:
43 domain_type
= LTTNG_DOMAIN_NONE
;
50 static void lttng_event_rule_release(struct urcu_ref
*ref
)
52 struct lttng_event_rule
*event_rule
=
53 container_of(ref
, typeof(*event_rule
), ref
);
55 assert(event_rule
->destroy
);
56 event_rule
->destroy(event_rule
);
59 void lttng_event_rule_destroy(struct lttng_event_rule
*event_rule
)
61 lttng_event_rule_put(event_rule
);
65 bool lttng_event_rule_validate(const struct lttng_event_rule
*event_rule
)
74 if (!event_rule
->validate
) {
75 /* Sub-class guarantees that it can never be invalid. */
80 valid
= event_rule
->validate(event_rule
);
86 int lttng_event_rule_serialize(const struct lttng_event_rule
*event_rule
,
87 struct lttng_payload
*payload
)
90 struct lttng_event_rule_comm event_rule_comm
= {};
97 event_rule_comm
.event_rule_type
= (int8_t) event_rule
->type
;
99 ret
= lttng_dynamic_buffer_append(
100 &payload
->buffer
, &event_rule_comm
, sizeof(event_rule_comm
));
105 ret
= event_rule
->serialize(event_rule
, payload
);
114 bool lttng_event_rule_is_equal(const struct lttng_event_rule
*a
,
115 const struct lttng_event_rule
*b
)
117 bool is_equal
= false;
123 if (a
->type
!= b
->type
) {
132 is_equal
= a
->equal
? a
->equal(a
, b
) : true;
138 ssize_t
lttng_event_rule_create_from_payload(
139 struct lttng_payload_view
*view
,
140 struct lttng_event_rule
**event_rule
)
142 ssize_t ret
, consumed
= 0;
143 const struct lttng_event_rule_comm
*event_rule_comm
;
144 event_rule_create_from_payload_cb create_from_payload
= NULL
;
146 if (!view
|| !event_rule
) {
151 DBG("Deserializing event_rule from payload.");
152 event_rule_comm
= (const struct lttng_event_rule_comm
*) view
->buffer
.data
;
153 consumed
+= sizeof(*event_rule_comm
);
155 switch ((enum lttng_event_rule_type
) event_rule_comm
->event_rule_type
) {
156 case LTTNG_EVENT_RULE_TYPE_TRACEPOINT
:
159 case LTTNG_EVENT_RULE_TYPE_KPROBE
:
160 create_from_payload
= lttng_event_rule_kprobe_create_from_payload
;
162 case LTTNG_EVENT_RULE_TYPE_KRETPROBE
:
165 case LTTNG_EVENT_RULE_TYPE_UPROBE
:
168 case LTTNG_EVENT_RULE_TYPE_SYSCALL
:
169 create_from_payload
=
170 lttng_event_rule_syscall_create_from_payload
;
173 ERR("Attempted to create event rule of unknown type (%i)",
174 (int) event_rule_comm
->event_rule_type
);
179 assert(create_from_payload
);
182 struct lttng_payload_view child_view
=
183 lttng_payload_view_from_view(
186 ret
= create_from_payload(&child_view
, event_rule
);
194 if (!lttng_event_rule_validate(*event_rule
)) {
205 void lttng_event_rule_init(struct lttng_event_rule
*event_rule
,
206 enum lttng_event_rule_type type
)
208 urcu_ref_init(&event_rule
->ref
);
209 event_rule
->type
= type
;
213 bool lttng_event_rule_get(struct lttng_event_rule
*event_rule
)
215 return urcu_ref_get_unless_zero(&event_rule
->ref
);
219 void lttng_event_rule_put(struct lttng_event_rule
*event_rule
)
225 assert(event_rule
->ref
.refcount
);
226 urcu_ref_put(&event_rule
->ref
, lttng_event_rule_release
);
230 enum lttng_error_code
lttng_event_rule_generate_filter_bytecode(
231 struct lttng_event_rule
*rule
, uid_t uid
, gid_t gid
)
233 assert(rule
->generate_filter_bytecode
);
234 return rule
->generate_filter_bytecode(rule
, uid
, gid
);
238 const char *lttng_event_rule_get_filter(const struct lttng_event_rule
*rule
)
240 assert(rule
->get_filter
);
241 return rule
->get_filter(rule
);
245 const struct lttng_filter_bytecode
*lttng_event_rule_get_filter_bytecode(
246 const struct lttng_event_rule
*rule
)
248 assert(rule
->get_filter_bytecode
);
249 return rule
->get_filter_bytecode(rule
);
253 struct lttng_event_exclusion
*lttng_event_rule_generate_exclusions(
254 const struct lttng_event_rule
*rule
)
256 assert(rule
->generate_exclusions
);
257 return rule
->generate_exclusions(rule
);
261 const char *lttng_event_rule_type_str(enum lttng_event_rule_type type
)
264 case LTTNG_EVENT_RULE_TYPE_UNKNOWN
:
266 case LTTNG_EVENT_RULE_TYPE_TRACEPOINT
:
268 case LTTNG_EVENT_RULE_TYPE_SYSCALL
:
270 case LTTNG_EVENT_RULE_TYPE_KPROBE
:
272 case LTTNG_EVENT_RULE_TYPE_KRETPROBE
:
274 case LTTNG_EVENT_RULE_TYPE_UPROBE
:
275 return "userspace-probe";