condition: implement event rule based condition
[lttng-tools.git] / src / common / conditions / condition.c
CommitLineData
a58c490f 1/*
ab5be9fa 2 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
a58c490f 3 *
ab5be9fa 4 * SPDX-License-Identifier: LGPL-2.1-only
a58c490f 5 *
a58c490f
JG
6 */
7
8#include <lttng/condition/condition-internal.h>
9#include <lttng/condition/buffer-usage-internal.h>
683d081a 10#include <lttng/condition/event-rule-internal.h>
e8360425 11#include <lttng/condition/session-consumed-size-internal.h>
c19092cd 12#include <lttng/condition/session-rotation-internal.h>
a58c490f
JG
13#include <common/macros.h>
14#include <common/error.h>
15#include <common/dynamic-buffer.h>
16#include <common/buffer-view.h>
17#include <stdbool.h>
18#include <assert.h>
19
20enum lttng_condition_type lttng_condition_get_type(
21 const struct lttng_condition *condition)
22{
23 return condition ? condition->type : LTTNG_CONDITION_TYPE_UNKNOWN;
24}
25
26void lttng_condition_destroy(struct lttng_condition *condition)
4655b864
JR
27{
28 lttng_condition_put(condition);
29}
30
31static void condition_destroy_ref(struct urcu_ref *ref)
32{
33 struct lttng_condition *condition =
34 container_of(ref, struct lttng_condition, ref);
35
36 condition->destroy(condition);
37}
38
39LTTNG_HIDDEN
40void lttng_condition_get(struct lttng_condition *condition)
41{
42 urcu_ref_get(&condition->ref);
43}
44
45LTTNG_HIDDEN
46void lttng_condition_put(struct lttng_condition *condition)
a58c490f
JG
47{
48 if (!condition) {
49 return;
50 }
51
52 assert(condition->destroy);
4655b864 53 urcu_ref_put(&condition->ref, condition_destroy_ref);
a58c490f
JG
54}
55
4655b864 56
a58c490f
JG
57LTTNG_HIDDEN
58bool lttng_condition_validate(const struct lttng_condition *condition)
59{
60 bool valid;
61
62 if (!condition) {
63 valid = false;
64 goto end;
65 }
66
67 if (!condition->validate) {
68 /* Sub-class guarantees that it can never be invalid. */
69 valid = true;
70 goto end;
71 }
72
73 valid = condition->validate(condition);
74end:
75 return valid;
76}
77
78LTTNG_HIDDEN
3647288f 79int lttng_condition_serialize(const struct lttng_condition *condition,
c0a66c84 80 struct lttng_payload *payload)
a58c490f 81{
3647288f 82 int ret;
c0a66c84 83 struct lttng_condition_comm condition_comm = {};
a58c490f
JG
84
85 if (!condition) {
86 ret = -1;
87 goto end;
88 }
89
3647288f
JG
90 condition_comm.condition_type = (int8_t) condition->type;
91
c0a66c84 92 ret = lttng_dynamic_buffer_append(&payload->buffer, &condition_comm,
3647288f
JG
93 sizeof(condition_comm));
94 if (ret) {
95 goto end;
a58c490f
JG
96 }
97
c0a66c84 98 ret = condition->serialize(condition, payload);
3647288f 99 if (ret) {
a58c490f
JG
100 goto end;
101 }
a58c490f
JG
102end:
103 return ret;
104}
105
106LTTNG_HIDDEN
107bool lttng_condition_is_equal(const struct lttng_condition *a,
108 const struct lttng_condition *b)
109{
110 bool is_equal = false;
111
112 if (!a || !b) {
113 goto end;
114 }
115
116 if (a->type != b->type) {
117 goto end;
118 }
119
6c2fe319
JG
120 if (a == b) {
121 is_equal = true;
122 goto end;
123 }
124
a58c490f
JG
125 is_equal = a->equal ? a->equal(a, b) : true;
126end:
127 return is_equal;
128}
129
130LTTNG_HIDDEN
c0a66c84
JG
131ssize_t lttng_condition_create_from_payload(
132 struct lttng_payload_view *view,
a58c490f
JG
133 struct lttng_condition **condition)
134{
135 ssize_t ret, condition_size = 0;
c0a66c84 136 condition_create_from_payload_cb create_from_payload = NULL;
3e6e0df2
JG
137 const struct lttng_condition_comm *condition_comm;
138 const struct lttng_payload_view condition_comm_view =
139 lttng_payload_view_from_view(
140 view, 0, sizeof(*condition_comm));
a58c490f 141
c0a66c84 142 if (!view || !condition) {
a58c490f
JG
143 ret = -1;
144 goto end;
145 }
146
3e6e0df2
JG
147 if (!lttng_payload_view_is_valid(&condition_comm_view)) {
148 /* Payload not large enough to contain the header. */
149 ret = -1;
150 goto end;
151 }
152
a58c490f 153 DBG("Deserializing condition from buffer");
3e6e0df2 154 condition_comm = (typeof(condition_comm)) condition_comm_view.buffer.data;
a58c490f
JG
155 condition_size += sizeof(*condition_comm);
156
157 switch ((enum lttng_condition_type) condition_comm->condition_type) {
158 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
c0a66c84 159 create_from_payload = lttng_condition_buffer_usage_low_create_from_payload;
a58c490f
JG
160 break;
161 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
c0a66c84 162 create_from_payload = lttng_condition_buffer_usage_high_create_from_payload;
a58c490f 163 break;
e8360425 164 case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
c0a66c84 165 create_from_payload = lttng_condition_session_consumed_size_create_from_payload;
e8360425 166 break;
c19092cd 167 case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
c0a66c84 168 create_from_payload = lttng_condition_session_rotation_ongoing_create_from_payload;
c19092cd
JG
169 break;
170 case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
c0a66c84 171 create_from_payload = lttng_condition_session_rotation_completed_create_from_payload;
c19092cd 172 break;
683d081a
JR
173 case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
174 create_from_payload = lttng_condition_event_rule_create_from_payload;
175 break;
a58c490f
JG
176 default:
177 ERR("Attempted to create condition of unknown type (%i)",
178 (int) condition_comm->condition_type);
179 ret = -1;
180 goto end;
181 }
182
c0a66c84
JG
183 if (create_from_payload) {
184 struct lttng_payload_view condition_view =
185 lttng_payload_view_from_view(view,
a58c490f
JG
186 sizeof(*condition_comm), -1);
187
c0a66c84 188 ret = create_from_payload(&condition_view, condition);
a58c490f
JG
189 if (ret < 0) {
190 goto end;
191 }
192 condition_size += ret;
193
194 } else {
195 abort();
196 }
197
198 ret = condition_size;
199end:
200 return ret;
201}
202
203LTTNG_HIDDEN
204void lttng_condition_init(struct lttng_condition *condition,
205 enum lttng_condition_type type)
206{
207 condition->type = type;
4655b864 208 urcu_ref_init(&condition->ref);
a58c490f 209}
This page took 0.063889 seconds and 4 git commands to generate.