SoW-2020-0002: Trace Hit Counters: trigger error reporting integration
[lttng-tools.git] / src / common / actions / action.c
index 4cad01b743189ff5318fa9e388ed2bd1d82f933a..86628542bc50186c32b20a0bc026530a235672d6 100644 (file)
@@ -5,57 +5,90 @@
  *
  */
 
+#include <assert.h>
+#include <common/error.h>
 #include <lttng/action/action-internal.h>
+#include <lttng/action/group-internal.h>
 #include <lttng/action/notify-internal.h>
-#include <common/error.h>
-#include <assert.h>
+#include <lttng/action/rotate-session-internal.h>
+#include <lttng/action/snapshot-session-internal.h>
+#include <lttng/action/start-session-internal.h>
+#include <lttng/action/stop-session-internal.h>
 
-static const char *lttng_action_type_string(enum lttng_action_type action_type)
+LTTNG_HIDDEN
+const char *lttng_action_type_string(enum lttng_action_type action_type)
 {
        switch (action_type) {
        case LTTNG_ACTION_TYPE_UNKNOWN:
                return "UNKNOWN";
+       case LTTNG_ACTION_TYPE_GROUP:
+               return "GROUP";
        case LTTNG_ACTION_TYPE_NOTIFY:
                return "NOTIFY";
+       case LTTNG_ACTION_TYPE_ROTATE_SESSION:
+               return "ROTATE_SESSION";
+       case LTTNG_ACTION_TYPE_SNAPSHOT_SESSION:
+               return "SNAPSHOT_SESSION";
+       case LTTNG_ACTION_TYPE_START_SESSION:
+               return "START_SESSION";
+       case LTTNG_ACTION_TYPE_STOP_SESSION:
+               return "STOP_SESSION";
        default:
                return "???";
        }
 }
 
-enum lttng_action_type lttng_action_get_type(struct lttng_action *action)
+enum lttng_action_type lttng_action_get_type(const struct lttng_action *action)
 {
        return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN;
 }
 
-LTTNG_HIDDEN
-enum lttng_action_type lttng_action_get_type_const(
-               const struct lttng_action *action)
-{
-       return action->type;
-}
-
 LTTNG_HIDDEN
 void lttng_action_init(
                struct lttng_action *action,
                enum lttng_action_type type,
                action_validate_cb validate,
                action_serialize_cb serialize,
+               action_equal_cb equal,
                action_destroy_cb destroy)
 {
+       urcu_ref_init(&action->ref);
        action->type = type;
        action->validate = validate;
        action->serialize = serialize;
+       action->equal = equal;
        action->destroy = destroy;
 }
 
-void lttng_action_destroy(struct lttng_action *action)
+static
+void action_destroy_ref(struct urcu_ref *ref)
+{
+       struct lttng_action *action =
+                       container_of(ref, struct lttng_action, ref);
+
+       action->destroy(action);
+}
+
+LTTNG_HIDDEN
+void lttng_action_get(struct lttng_action *action)
+{
+       urcu_ref_get(&action->ref);
+}
+
+LTTNG_HIDDEN
+void lttng_action_put(struct lttng_action *action)
 {
        if (!action) {
                return;
        }
 
        assert(action->destroy);
-       action->destroy(action);
+       urcu_ref_put(&action->ref, action_destroy_ref);
+}
+
+void lttng_action_destroy(struct lttng_action *action)
+{
+       lttng_action_put(action);
 }
 
 LTTNG_HIDDEN
@@ -81,20 +114,20 @@ end:
 
 LTTNG_HIDDEN
 int lttng_action_serialize(struct lttng_action *action,
-               struct lttng_dynamic_buffer *buf)
+               struct lttng_payload *payload)
 {
        int ret;
        struct lttng_action_comm action_comm = {
                .action_type = (int8_t) action->type,
        };
 
-       ret = lttng_dynamic_buffer_append(buf, &action_comm,
+       ret = lttng_dynamic_buffer_append(&payload->buffer, &action_comm,
                        sizeof(action_comm));
        if (ret) {
                goto end;
        }
 
-       ret = action->serialize(action, buf);
+       ret = action->serialize(action, payload);
        if (ret) {
                goto end;
        }
@@ -103,30 +136,48 @@ end:
 }
 
 LTTNG_HIDDEN
-ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view,
+ssize_t lttng_action_create_from_payload(struct lttng_payload_view *view,
                struct lttng_action **action)
 {
        ssize_t consumed_len, specific_action_consumed_len;
        const struct lttng_action_comm *action_comm;
-       action_create_from_buffer_cb create_from_buffer_cb;
-       struct lttng_buffer_view specific_action_view;
+       action_create_from_payload_cb create_from_payload_cb;
 
        if (!view || !action) {
                consumed_len = -1;
                goto end;
        }
 
-       action_comm = (const struct lttng_action_comm *) view->data;
+       action_comm = (const struct lttng_action_comm *) view->buffer.data;
 
-       DBG("Create action from buffer: action-type=%s",
+       DBG("Create action from payload: action-type=%s",
                        lttng_action_type_string(action_comm->action_type));
 
        switch (action_comm->action_type) {
        case LTTNG_ACTION_TYPE_NOTIFY:
-               create_from_buffer_cb = lttng_action_notify_create_from_buffer;
+               create_from_payload_cb = lttng_action_notify_create_from_payload;
+               break;
+       case LTTNG_ACTION_TYPE_ROTATE_SESSION:
+               create_from_payload_cb =
+                               lttng_action_rotate_session_create_from_payload;
+               break;
+       case LTTNG_ACTION_TYPE_SNAPSHOT_SESSION:
+               create_from_payload_cb =
+                               lttng_action_snapshot_session_create_from_payload;
+               break;
+       case LTTNG_ACTION_TYPE_START_SESSION:
+               create_from_payload_cb =
+                               lttng_action_start_session_create_from_payload;
+               break;
+       case LTTNG_ACTION_TYPE_STOP_SESSION:
+               create_from_payload_cb =
+                               lttng_action_stop_session_create_from_payload;
+               break;
+       case LTTNG_ACTION_TYPE_GROUP:
+               create_from_payload_cb = lttng_action_group_create_from_payload;
                break;
        default:
-               ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)",
+               ERR("Failed to create action from payload, unhandled action type: action-type=%u (%s)",
                                action_comm->action_type,
                                lttng_action_type_string(
                                                action_comm->action_type));
@@ -134,13 +185,16 @@ ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view,
                goto end;
        }
 
-       /* Create buffer view for the action-type-specific data. */
-       specific_action_view = lttng_buffer_view_from_view(view,
-                       sizeof(struct lttng_action_comm),
-                       view->size - sizeof(struct lttng_action_comm));
+       {
+               /* Create buffer view for the action-type-specific data. */
+               struct lttng_payload_view specific_action_view =
+                               lttng_payload_view_from_view(view,
+                                               sizeof(struct lttng_action_comm),
+                                               -1);
 
-       specific_action_consumed_len =
-                       create_from_buffer_cb(&specific_action_view, action);
+               specific_action_consumed_len = create_from_payload_cb(
+                               &specific_action_view, action);
+       }
        if (specific_action_consumed_len < 0) {
                ERR("Failed to create specific action from buffer.");
                consumed_len = -1;
@@ -155,3 +209,28 @@ ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view,
 end:
        return consumed_len;
 }
+
+LTTNG_HIDDEN
+bool lttng_action_is_equal(const struct lttng_action *a,
+               const struct lttng_action *b)
+{
+       bool is_equal = false;
+
+       if (!a || !b) {
+               goto end;
+       }
+
+       if (a->type != b->type) {
+               goto end;
+       }
+
+       if (a == b) {
+               is_equal = true;
+               goto end;
+       }
+
+       assert(a->equal);
+       is_equal = a->equal(a, b);
+end:
+       return is_equal;
+}
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