--- /dev/null
+/*
+ * Ceph - scalable distributed file system
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ * Copyright Inktank 2013
+ */
+
+#include "objclass/objclass.h"
+
+#include "cls_replica_log_types.h"
+#include "cls_replica_log_ops.h"
+
+CLS_VER(1, 0)
+CLS_NAME(replica_log)
+
+static const string replica_log_prefix = "rl_";
+static const string replica_log_bounds = replica_log_prefix + "bounds";
+
+static int get_bounds(cls_method_context_t hctx, cls_replica_log_bound& bound)
+{
+ bufferlist bounds_bl;
+ int rc = cls_cxx_map_get_val(hctx, replica_log_bounds, &bounds_bl);
+ if (rc < 0) {
+ return rc;
+ }
+
+ try {
+ bufferlist::iterator bounds_bl_i = bounds_bl.begin();
+ ::decode(bound, bounds_bl_i);
+ } catch (buffer::error& err) {
+ bound = cls_replica_log_bound();
+ CLS_LOG(0, "ERROR: get_bounds(): failed to decode on-disk bounds object");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int write_bounds(cls_method_context_t hctx,
+ const cls_replica_log_bound& bound)
+{
+ bufferlist bounds_bl;
+ ::encode(bound, bounds_bl);
+ return cls_cxx_map_set_val(hctx, replica_log_bounds, &bounds_bl);
+}
+
+static int cls_replica_log_set(cls_method_context_t hctx,
+ bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_replica_log_set_marker_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(0, "ERROR: cls_replica_log_set(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_replica_log_bound bound;
+ int rc = get_bounds(hctx, bound);
+ if (rc < 0 && rc != -ENOENT) {
+ return rc;
+ }
+
+ rc = bound.update_marker(op.marker);
+ if (rc < 0) {
+ return rc;
+ }
+
+ return write_bounds(hctx, bound);
+}
+
+static int cls_replica_log_delete(cls_method_context_t hctx,
+ bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_replica_log_delete_marker_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(0, "ERROR: cls_replica_log_delete(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_replica_log_bound bound;
+ int rc = get_bounds(hctx, bound);
+ if (rc < 0 && rc != -ENOENT) {
+ return rc;
+ }
+
+ rc = bound.delete_marker(op.entity_id);
+ if (rc < 0) {
+ return rc;
+ }
+
+ return write_bounds(hctx, bound);
+}
+
+static int cls_replica_log_get(cls_method_context_t hctx,
+ bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_replica_log_get_bounds_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(0, "ERROR: cls_replica_log_get(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_replica_log_bound bound;
+ int rc = get_bounds(hctx, bound);
+ if (rc < 0) {
+ return rc;
+ }
+
+ cls_replica_log_get_bounds_ret ret;
+ ret.oldest_time = bound.get_oldest_time();
+ ret.position_marker = bound.get_lowest_marker_bound();
+ bound.get_markers(ret.markers);
+
+ ::encode(ret, *out);
+ return 0;
+}
+
+CLS_INIT(replica_log)
+{
+ CLS_LOG(1, "Loaded replica log class!");
+
+ cls_handle_t h_class;
+ cls_method_handle_t h_replica_log_set;
+ cls_method_handle_t h_replica_log_delete;
+ cls_method_handle_t h_replica_log_get;
+
+ cls_register("replica_log", &h_class);
+
+ cls_register_cxx_method(h_class, "set", CLS_METHOD_RD | CLS_METHOD_WR,
+ cls_replica_log_set, &h_replica_log_set);
+ cls_register_cxx_method(h_class, "get", CLS_METHOD_RD,
+ cls_replica_log_get, &h_replica_log_get);
+ cls_register_cxx_method(h_class, "delete", CLS_METHOD_RD | CLS_METHOD_WR,
+ cls_replica_log_delete, &h_replica_log_delete);
+}