2 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * SPDX-License-Identifier: LGPL-2.1-only
9 #include <common/error.h>
10 #include <lttng/action/action-internal.h>
11 #include <lttng/action/group-internal.h>
12 #include <lttng/action/notify-internal.h>
13 #include <lttng/action/rotate-session-internal.h>
14 #include <lttng/action/snapshot-session-internal.h>
15 #include <lttng/action/start-session-internal.h>
16 #include <lttng/action/stop-session-internal.h>
19 const char *lttng_action_type_string(enum lttng_action_type action_type
)
21 switch (action_type
) {
22 case LTTNG_ACTION_TYPE_UNKNOWN
:
24 case LTTNG_ACTION_TYPE_GROUP
:
26 case LTTNG_ACTION_TYPE_NOTIFY
:
28 case LTTNG_ACTION_TYPE_ROTATE_SESSION
:
29 return "ROTATE_SESSION";
30 case LTTNG_ACTION_TYPE_SNAPSHOT_SESSION
:
31 return "SNAPSHOT_SESSION";
32 case LTTNG_ACTION_TYPE_START_SESSION
:
33 return "START_SESSION";
34 case LTTNG_ACTION_TYPE_STOP_SESSION
:
35 return "STOP_SESSION";
41 enum lttng_action_type
lttng_action_get_type(const struct lttng_action
*action
)
43 return action
? action
->type
: LTTNG_ACTION_TYPE_UNKNOWN
;
47 enum lttng_action_type
lttng_action_get_type_const(
48 const struct lttng_action
*action
)
54 void lttng_action_init(
55 struct lttng_action
*action
,
56 enum lttng_action_type type
,
57 action_validate_cb validate
,
58 action_serialize_cb serialize
,
59 action_equal_cb equal
,
60 action_destroy_cb destroy
)
62 urcu_ref_init(&action
->ref
);
64 action
->validate
= validate
;
65 action
->serialize
= serialize
;
66 action
->equal
= equal
;
67 action
->destroy
= destroy
;
71 void action_destroy_ref(struct urcu_ref
*ref
)
73 struct lttng_action
*action
=
74 container_of(ref
, struct lttng_action
, ref
);
76 action
->destroy(action
);
80 void lttng_action_get(struct lttng_action
*action
)
82 urcu_ref_get(&action
->ref
);
86 void lttng_action_put(struct lttng_action
*action
)
92 assert(action
->destroy
);
93 urcu_ref_put(&action
->ref
, action_destroy_ref
);
96 void lttng_action_destroy(struct lttng_action
*action
)
98 lttng_action_put(action
);
102 bool lttng_action_validate(struct lttng_action
*action
)
111 if (!action
->validate
) {
112 /* Sub-class guarantees that it can never be invalid. */
117 valid
= action
->validate(action
);
123 int lttng_action_serialize(struct lttng_action
*action
,
124 struct lttng_dynamic_buffer
*buf
)
127 struct lttng_action_comm action_comm
= {
128 .action_type
= (int8_t) action
->type
,
131 ret
= lttng_dynamic_buffer_append(buf
, &action_comm
,
132 sizeof(action_comm
));
137 ret
= action
->serialize(action
, buf
);
146 ssize_t
lttng_action_create_from_buffer(const struct lttng_buffer_view
*view
,
147 struct lttng_action
**action
)
149 ssize_t consumed_len
, specific_action_consumed_len
;
150 const struct lttng_action_comm
*action_comm
;
151 action_create_from_buffer_cb create_from_buffer_cb
;
152 struct lttng_buffer_view specific_action_view
;
154 if (!view
|| !action
) {
159 action_comm
= (const struct lttng_action_comm
*) view
->data
;
161 DBG("Create action from buffer: action-type=%s",
162 lttng_action_type_string(action_comm
->action_type
));
164 switch (action_comm
->action_type
) {
165 case LTTNG_ACTION_TYPE_NOTIFY
:
166 create_from_buffer_cb
= lttng_action_notify_create_from_buffer
;
168 case LTTNG_ACTION_TYPE_ROTATE_SESSION
:
169 create_from_buffer_cb
=
170 lttng_action_rotate_session_create_from_buffer
;
172 case LTTNG_ACTION_TYPE_SNAPSHOT_SESSION
:
173 create_from_buffer_cb
=
174 lttng_action_snapshot_session_create_from_buffer
;
176 case LTTNG_ACTION_TYPE_START_SESSION
:
177 create_from_buffer_cb
=
178 lttng_action_start_session_create_from_buffer
;
180 case LTTNG_ACTION_TYPE_STOP_SESSION
:
181 create_from_buffer_cb
=
182 lttng_action_stop_session_create_from_buffer
;
184 case LTTNG_ACTION_TYPE_GROUP
:
185 create_from_buffer_cb
= lttng_action_group_create_from_buffer
;
188 ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)",
189 action_comm
->action_type
,
190 lttng_action_type_string(
191 action_comm
->action_type
));
196 /* Create buffer view for the action-type-specific data. */
197 specific_action_view
= lttng_buffer_view_from_view(view
,
198 sizeof(struct lttng_action_comm
),
199 view
->size
- sizeof(struct lttng_action_comm
));
201 specific_action_consumed_len
=
202 create_from_buffer_cb(&specific_action_view
, action
);
203 if (specific_action_consumed_len
< 0) {
204 ERR("Failed to create specific action from buffer.");
211 consumed_len
= sizeof(struct lttng_action_comm
) +
212 specific_action_consumed_len
;
219 bool lttng_action_is_equal(const struct lttng_action
*a
,
220 const struct lttng_action
*b
)
222 bool is_equal
= false;
228 if (a
->type
!= b
->type
) {
237 is_equal
= a
->equal
? a
->equal(a
, b
) : true;