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>
17 #include <lttng/event-rule/uprobe-internal.h>
20 enum lttng_event_rule_type
lttng_event_rule_get_type(
21 const struct lttng_event_rule
*event_rule
)
23 return event_rule
? event_rule
->type
: LTTNG_EVENT_RULE_TYPE_UNKNOWN
;
27 enum lttng_domain_type
lttng_event_rule_get_domain_type(
28 const struct lttng_event_rule
*event_rule
)
30 enum lttng_domain_type domain_type
= LTTNG_DOMAIN_NONE
;
32 switch (lttng_event_rule_get_type(event_rule
)) {
33 case LTTNG_EVENT_RULE_TYPE_TRACEPOINT
:
35 domain_type
= LTTNG_DOMAIN_NONE
;
37 case LTTNG_EVENT_RULE_TYPE_SYSCALL
:
38 case LTTNG_EVENT_RULE_TYPE_KPROBE
:
39 case LTTNG_EVENT_RULE_TYPE_KRETPROBE
:
40 case LTTNG_EVENT_RULE_TYPE_UPROBE
:
41 domain_type
= LTTNG_DOMAIN_KERNEL
;
43 case LTTNG_EVENT_RULE_TYPE_UNKNOWN
:
44 domain_type
= LTTNG_DOMAIN_NONE
;
51 static void lttng_event_rule_release(struct urcu_ref
*ref
)
53 struct lttng_event_rule
*event_rule
=
54 container_of(ref
, typeof(*event_rule
), ref
);
56 assert(event_rule
->destroy
);
57 event_rule
->destroy(event_rule
);
60 void lttng_event_rule_destroy(struct lttng_event_rule
*event_rule
)
62 lttng_event_rule_put(event_rule
);
66 bool lttng_event_rule_validate(const struct lttng_event_rule
*event_rule
)
75 if (!event_rule
->validate
) {
76 /* Sub-class guarantees that it can never be invalid. */
81 valid
= event_rule
->validate(event_rule
);
87 int lttng_event_rule_serialize(const struct lttng_event_rule
*event_rule
,
88 struct lttng_payload
*payload
)
91 struct lttng_event_rule_comm event_rule_comm
= {};
98 event_rule_comm
.event_rule_type
= (int8_t) event_rule
->type
;
100 ret
= lttng_dynamic_buffer_append(
101 &payload
->buffer
, &event_rule_comm
, sizeof(event_rule_comm
));
106 ret
= event_rule
->serialize(event_rule
, payload
);
115 bool lttng_event_rule_is_equal(const struct lttng_event_rule
*a
,
116 const struct lttng_event_rule
*b
)
118 bool is_equal
= false;
124 if (a
->type
!= b
->type
) {
133 is_equal
= a
->equal
? a
->equal(a
, b
) : true;
139 ssize_t
lttng_event_rule_create_from_payload(
140 struct lttng_payload_view
*view
,
141 struct lttng_event_rule
**event_rule
)
143 ssize_t ret
, consumed
= 0;
144 const struct lttng_event_rule_comm
*event_rule_comm
;
145 event_rule_create_from_payload_cb create_from_payload
= NULL
;
147 if (!view
|| !event_rule
) {
152 DBG("Deserializing event_rule from payload.");
153 event_rule_comm
= (const struct lttng_event_rule_comm
*) view
->buffer
.data
;
154 consumed
+= sizeof(*event_rule_comm
);
156 switch ((enum lttng_event_rule_type
) event_rule_comm
->event_rule_type
) {
157 case LTTNG_EVENT_RULE_TYPE_TRACEPOINT
:
160 case LTTNG_EVENT_RULE_TYPE_KPROBE
:
161 create_from_payload
= lttng_event_rule_kprobe_create_from_payload
;
163 case LTTNG_EVENT_RULE_TYPE_KRETPROBE
:
166 case LTTNG_EVENT_RULE_TYPE_UPROBE
:
167 create_from_payload
= lttng_event_rule_uprobe_create_from_payload
;
169 case LTTNG_EVENT_RULE_TYPE_SYSCALL
:
170 create_from_payload
=
171 lttng_event_rule_syscall_create_from_payload
;
174 ERR("Attempted to create event rule of unknown type (%i)",
175 (int) event_rule_comm
->event_rule_type
);
180 assert(create_from_payload
);
183 struct lttng_payload_view child_view
=
184 lttng_payload_view_from_view(
187 ret
= create_from_payload(&child_view
, event_rule
);
195 if (!lttng_event_rule_validate(*event_rule
)) {
206 void lttng_event_rule_init(struct lttng_event_rule
*event_rule
,
207 enum lttng_event_rule_type type
)
209 urcu_ref_init(&event_rule
->ref
);
210 event_rule
->type
= type
;
214 bool lttng_event_rule_get(struct lttng_event_rule
*event_rule
)
216 return urcu_ref_get_unless_zero(&event_rule
->ref
);
220 void lttng_event_rule_put(struct lttng_event_rule
*event_rule
)
226 assert(event_rule
->ref
.refcount
);
227 urcu_ref_put(&event_rule
->ref
, lttng_event_rule_release
);
231 enum lttng_error_code
lttng_event_rule_generate_filter_bytecode(
232 struct lttng_event_rule
*rule
, uid_t uid
, gid_t gid
)
234 assert(rule
->generate_filter_bytecode
);
235 return rule
->generate_filter_bytecode(rule
, uid
, gid
);
239 const char *lttng_event_rule_get_filter(const struct lttng_event_rule
*rule
)
241 assert(rule
->get_filter
);
242 return rule
->get_filter(rule
);
246 const struct lttng_filter_bytecode
*lttng_event_rule_get_filter_bytecode(
247 const struct lttng_event_rule
*rule
)
249 assert(rule
->get_filter_bytecode
);
250 return rule
->get_filter_bytecode(rule
);
254 struct lttng_event_exclusion
*lttng_event_rule_generate_exclusions(
255 const struct lttng_event_rule
*rule
)
257 assert(rule
->generate_exclusions
);
258 return rule
->generate_exclusions(rule
);
262 const char *lttng_event_rule_type_str(enum lttng_event_rule_type type
)
265 case LTTNG_EVENT_RULE_TYPE_UNKNOWN
:
267 case LTTNG_EVENT_RULE_TYPE_TRACEPOINT
:
269 case LTTNG_EVENT_RULE_TYPE_SYSCALL
:
271 case LTTNG_EVENT_RULE_TYPE_KPROBE
:
273 case LTTNG_EVENT_RULE_TYPE_KRETPROBE
:
275 case LTTNG_EVENT_RULE_TYPE_UPROBE
:
276 return "userspace-probe";