Extract the lost packets and discarded events counters

[lttng-tools.git] / src / common / config / session-config.c

diff --git a/src/common/config/session-config.c b/src/common/config/session-config.c
index 8fcb75230ad4309e4efddb428ab748c9b6721ab9..d89249879aece2dc99ea2b138dfcc3784154f097 100644 (file)
--- a/src/common/config/session-config.c
+++ b/src/common/config/session-config.c
@@ -95,6 +95,8 @@ const char * const config_element_output_type = "output_type";
 const char * const config_element_tracefile_size = "tracefile_size";
 const char * const config_element_tracefile_count = "tracefile_count";
 const char * const config_element_live_timer_interval = "live_timer_interval";
+const char * const config_element_discarded_events = "discarded_events";
+const char * const config_element_lost_packets = "lost_packets";
 const char * const config_element_type = "type";
 const char * const config_element_buffer_type = "buffer_type";
 const char * const config_element_session = "session";
@@ -455,7 +457,40 @@ int config_writer_open_element(struct config_writer *writer,
        ret = xmlTextWriterStartElement(writer->writer, encoded_element_name);
        xmlFree(encoded_element_name);
 end:
-       return ret > 0 ? 0 : ret;
+       return ret >= 0 ? 0 : ret;
+}
+
+LTTNG_HIDDEN
+int config_writer_write_attribute(struct config_writer *writer,
+               const char *name, const char *value)
+{
+       int ret;
+       xmlChar *encoded_name = NULL;
+       xmlChar *encoded_value = NULL;
+
+       if (!writer || !writer->writer || !name || !name[0]) {
+               ret = -1;
+               goto end;
+       }
+
+       encoded_name = encode_string(name);
+       if (!encoded_name) {
+               ret = -1;
+               goto end;
+       }
+
+       encoded_value = encode_string(value);
+       if (!encoded_value) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name,
+                       encoded_value);
+end:
+       xmlFree(encoded_name);
+       xmlFree(encoded_value);
+       return ret >= 0 ? 0 : ret;
 }
 
 LTTNG_HIDDEN
@@ -470,7 +505,7 @@ int config_writer_close_element(struct config_writer *writer)
 
        ret = xmlTextWriterEndElement(writer->writer);
 end:
-       return ret > 0 ? 0 : ret;
+       return ret >= 0 ? 0 : ret;
 }
 
 LTTNG_HIDDEN
@@ -495,7 +530,7 @@ int config_writer_write_element_unsigned_int(struct config_writer *writer,
                encoded_element_name, "%" PRIu64, value);
        xmlFree(encoded_element_name);
 end:
-       return ret > 0 ? 0 : ret;
+       return ret >= 0 ? 0 : ret;
 }
 
 LTTNG_HIDDEN
@@ -520,7 +555,7 @@ int config_writer_write_element_signed_int(struct config_writer *writer,
                encoded_element_name, "%" PRIi64, value);
        xmlFree(encoded_element_name);
 end:
-       return ret > 0 ? 0 : ret;
+       return ret >= 0 ? 0 : ret;
 }
 
 LTTNG_HIDDEN
@@ -562,7 +597,7 @@ int config_writer_write_element_string(struct config_writer *writer,
 end:
        xmlFree(encoded_element_name);
        xmlFree(encoded_value);
-       return ret > 0 ? 0 : ret;
+       return ret >= 0 ? 0 : ret;
 }
 
 static