trigger: implement listing of registered trigger

[lttng-tools.git] / src / bin / lttng-sessiond / client.c

diff --git a/src/bin/lttng-sessiond/client.c b/src/bin/lttng-sessiond/client.c
index 04846abf57f0ffcea7d119898197163ac998774e..faf5d579fde6fbb7affa61267babdce675f6d844 100644 (file)
--- a/src/bin/lttng-sessiond/client.c
+++ b/src/bin/lttng-sessiond/client.c
@@ -801,6 +801,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int *sock,
        case LTTNG_ROTATION_SET_SCHEDULE:
        case LTTNG_SESSION_LIST_ROTATION_SCHEDULES:
        case LTTNG_CLEAR_SESSION:
+       case LTTNG_LIST_TRIGGERS:
                need_domain = 0;
                break;
        default:
@@ -847,6 +848,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int *sock,
        case LTTNG_DATA_PENDING:
        case LTTNG_ROTATE_SESSION:
        case LTTNG_ROTATION_GET_INFO:
+       case LTTNG_LIST_TRIGGERS:
                break;
        default:
                /* Setup lttng message with no payload */
@@ -867,6 +869,7 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int *sock,
        case LTTNG_SAVE_SESSION:
        case LTTNG_REGISTER_TRIGGER:
        case LTTNG_UNREGISTER_TRIGGER:
+       case LTTNG_LIST_TRIGGERS:
                need_tracing_session = 0;
                break;
        default:
@@ -1334,6 +1337,11 @@ error_add_context:
 
                payload_view = lttng_buffer_view_from_dynamic_buffer(
                                &payload, 0, name_len);
+               if (name_len > 0 && !lttng_buffer_view_is_valid(&payload_view)) {
+                       ret = LTTNG_ERR_INVALID_PROTOCOL;
+                       goto error_add_remove_tracker_value;
+               }
+
                /*
                 * Validate the value type and domains are legal for the process
                 * attribute tracker that is specified and convert the value to
@@ -2180,6 +2188,44 @@ error_add_context:
                ret = cmd_clear_session(cmd_ctx->session, sock);
                break;
        }
+       case LTTNG_LIST_TRIGGERS:
+       {
+               struct lttng_triggers *return_triggers = NULL;
+               size_t original_payload_size;
+               size_t payload_size;
+
+               ret = setup_empty_lttng_msg(cmd_ctx);
+               if (ret) {
+                       ret = LTTNG_ERR_NOMEM;
+                       goto setup_error;
+               }
+
+               original_payload_size = cmd_ctx->reply_payload.buffer.size;
+
+               ret = cmd_list_triggers(cmd_ctx,
+                               notification_thread_handle, &return_triggers);
+               if (ret != LTTNG_OK) {
+                       goto error;
+               }
+
+               assert(return_triggers);
+               ret = lttng_triggers_serialize(
+                               return_triggers, &cmd_ctx->reply_payload);
+               lttng_triggers_destroy(return_triggers);
+               if (ret) {
+                       ERR("Failed to serialize triggers in reply to `list triggers` command");
+                       ret = LTTNG_ERR_NOMEM;
+                       goto error;
+               }
+
+               payload_size = cmd_ctx->reply_payload.buffer.size -
+                       original_payload_size;
+
+               update_lttng_msg(cmd_ctx, 0, payload_size);
+
+               ret = LTTNG_OK;
+               break;
+       }
        default:
                ret = LTTNG_ERR_UND;
                break;