MI: implement all objects related to trigger machine interface

[lttng-tools.git] / src / common / snapshot.c

diff --git a/src/common/snapshot.c b/src/common/snapshot.c
index b0bebc81d19f803edca1009e0eacf1e157e34d58..ec10f8d636dbca1cd5ba457763fa09924800d248 100644 (file)
--- a/src/common/snapshot.c
+++ b/src/common/snapshot.c
@@ -5,8 +5,10 @@
  *
  */
 
-#include <common/payload.h>
+#include <common/error.h>
+#include <common/mi-lttng.h>
 #include <common/payload-view.h>
+#include <common/payload.h>
 #include <common/snapshot.h>
 #include <lttng/snapshot-internal.h>
 #include <lttng/snapshot.h>
@@ -177,3 +179,80 @@ end:
        lttng_snapshot_output_destroy(output);
        return ret;
 }
+
+LTTNG_HIDDEN
+enum lttng_error_code lttng_snapshot_output_mi_serialize(
+               const struct lttng_snapshot_output *output,
+               struct mi_writer *writer)
+{
+       int ret;
+       enum lttng_error_code ret_code;
+
+       assert(output);
+       assert(writer);
+
+       /* Open output element. */
+       ret = mi_lttng_writer_open_element(writer,
+                       mi_lttng_element_action_snapshot_session_output);
+       if (ret) {
+               goto mi_error;
+       }
+
+       /* Name. */
+       if (strnlen(output->name, LTTNG_NAME_MAX) != 0) {
+               ret = mi_lttng_writer_write_element_string(
+                               writer, config_element_name, output->name);
+               if (ret) {
+                       goto mi_error;
+               }
+       }
+
+       /* Control url (always present). */
+       ret = mi_lttng_writer_write_element_string(writer,
+                       mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
+       if (ret) {
+               goto mi_error;
+       }
+
+       /* Data url (optional). */
+       if (strnlen(output->data_url, PATH_MAX) != 0) {
+               ret = mi_lttng_writer_write_element_string(writer,
+                               mi_lttng_element_snapshot_data_url,
+                               output->data_url);
+               if (ret) {
+                       goto mi_error;
+               }
+       }
+
+       /*
+        * Maximum size in bytes of the snapshot meaning the total size of all
+        * streams combined. A value of 0 means unlimited. The default value is
+        * UINT64_MAX which also means unlimited in practice.
+        *
+        * The value is not serialized when it is set to either of those values
+        * to normalize them to '0'.
+        */
+       if (output->max_size > 0 && output->max_size != UINT64_MAX) {
+               /* Total size of all stream combined. */
+               ret = mi_lttng_writer_write_element_unsigned_int(writer,
+                               mi_lttng_element_snapshot_max_size,
+                               output->max_size);
+               if (ret) {
+                       goto mi_error;
+               }
+       }
+
+       /* Close output element. */
+       ret = mi_lttng_writer_close_element(writer);
+       if (ret) {
+               goto mi_error;
+       }
+
+       ret_code = LTTNG_OK;
+       goto end;
+
+mi_error:
+       ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+       return ret_code;
+}