--- /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 2013 Inktank
+ */
+
+#ifndef CLS_REPLICA_LOG_TYPES_H_
+#define CLS_REPLICA_LOG_TYPES_H_
+
+#include "include/utime.h"
+#include "include/encoding.h"
+#include "include/types.h"
+#include <errno.h>
+
+class JSONObj;
+
+struct cls_replica_log_item_marker {
+ string item_name; // the name of the item we're marking
+ utime_t item_timestamp; // the time stamp at which the item was outdated
+
+ cls_replica_log_item_marker() {}
+ cls_replica_log_item_marker(const string& name, const utime_t& time) :
+ item_name(name), item_timestamp(time) {}
+
+ void encode(bufferlist& bl) const {
+ ENCODE_START(1, 1, bl);
+ ::encode(item_name, bl);
+ ::encode(item_timestamp, bl);
+ ENCODE_FINISH(bl);
+ }
+
+ void decode(bufferlist::iterator& bl) {
+ DECODE_START(1, bl);
+ ::decode(item_name, bl);
+ ::decode(item_timestamp, bl);
+ DECODE_FINISH(bl);
+ }
+
+ void dump(Formatter *f) const;
+ void decode_json(JSONObj *obj);
+ static void generate_test_instances(std::list<cls_replica_log_item_marker*>& ls);
+};
+WRITE_CLASS_ENCODER(cls_replica_log_item_marker)
+
+struct cls_replica_log_progress_marker {
+ string entity_id; // the name of the entity setting the progress marker
+ string position_marker; // represents a log listing position on the master
+ utime_t position_time; // the timestamp associated with the position marker
+ std::list<cls_replica_log_item_marker> items; /* any items not caught up
+ to the position marker*/
+
+ cls_replica_log_progress_marker() {}
+ cls_replica_log_progress_marker(const string& entity, const string& marker,
+ const utime_t& time ) :
+ entity_id(entity), position_marker(marker),
+ position_time(time) {}
+ cls_replica_log_progress_marker(const string& entity, const string& marker,
+ const utime_t& time,
+ const std::list<cls_replica_log_item_marker>& b) :
+ entity_id(entity), position_marker(marker),
+ position_time(time),
+ items(b) {}
+
+ void encode(bufferlist& bl) const {
+ ENCODE_START(1, 1, bl);
+ ::encode(entity_id, bl);
+ ::encode(position_marker, bl);
+ ::encode(position_time, bl);
+ ::encode(items, bl);
+ ENCODE_FINISH(bl);
+ }
+
+ void decode(bufferlist::iterator& bl) {
+ DECODE_START(1, bl);
+ ::decode(entity_id, bl);
+ ::decode(position_marker, bl);
+ ::decode(position_time, bl);
+ ::decode(items, bl);
+ DECODE_FINISH(bl);
+ }
+
+ void dump(Formatter *f) const;
+ void decode_json(JSONObj *obj);
+ static void generate_test_instances(std::list<cls_replica_log_progress_marker*>& ls);
+};
+WRITE_CLASS_ENCODER(cls_replica_log_progress_marker)
+
+class cls_replica_log_bound {
+ /**
+ * Right now, we are lazy and only support a single marker at a time. In the
+ * future, we might support more than one, so the interface is designed to
+ * let that work.
+ */
+ string position_marker; // represents a log listing position on the master
+ utime_t position_time; // the timestamp associated with the position marker
+ bool marker_exists; // has the marker been set?
+ cls_replica_log_progress_marker marker; // the status of the current locker
+
+public:
+ cls_replica_log_bound() : marker_exists(false) {}
+
+ int update_marker(const cls_replica_log_progress_marker& new_mark) {
+ // only one marker at a time right now
+ if (marker_exists && (marker.entity_id != new_mark.entity_id)) {
+ return -EEXIST;
+ }
+ // can't go backwards with our one marker!
+ if (marker_exists && (marker.position_time > new_mark.position_time)) {
+ return -EINVAL;
+ }
+
+ marker = new_mark;
+ position_marker = new_mark.position_marker;
+ position_time = new_mark.position_time;
+ marker_exists = true;
+ // hey look, updating is idempotent; did you notice that?
+ return 0;
+ }
+
+ int delete_marker(const string& entity_id) {
+ if (marker_exists) {
+ // ENOENT if our marker doesn't match the passed ID
+ if (marker.entity_id != entity_id) {
+ return -ENOENT;
+ }
+ // you can't delete it if there are unclean entries
+ if (!marker.items.empty()) {
+ return -ENOTEMPTY;
+ }
+ }
+
+ marker_exists = false;
+ marker = cls_replica_log_progress_marker();
+ // hey look, deletion is idempotent! Hurray.
+ return 0;
+ }
+
+ std::string get_lowest_marker_bound() {
+ return position_marker;
+ }
+
+ utime_t get_lowest_time_bound() {
+ return position_time;
+ }
+
+ utime_t get_oldest_time() {
+ utime_t oldest = position_time;
+ list<cls_replica_log_item_marker>::const_iterator i;
+ for ( i = marker.items.begin(); i != marker.items.end(); ++i) {
+ if (i->item_timestamp < oldest)
+ oldest = i->item_timestamp;
+ }
+ return oldest;
+ }
+
+ void get_markers(list<cls_replica_log_progress_marker>& ls) {
+ if (marker_exists) {
+ ls.push_back(marker);
+ }
+ }
+
+ void encode(bufferlist& bl) const {
+ ENCODE_START(1, 1, bl);
+ ::encode(position_marker, bl);
+ ::encode(position_time, bl);
+ ::encode(marker_exists, bl);
+ if (marker_exists) {
+ ::encode(marker, bl);
+ }
+ ENCODE_FINISH(bl);
+ }
+ void decode(bufferlist::iterator& bl) {
+ DECODE_START(1, bl);
+ ::decode(position_marker, bl);
+ ::decode(position_time, bl);
+ ::decode(marker_exists, bl);
+ if (marker_exists) {
+ ::decode(marker, bl);
+ }
+ DECODE_FINISH(bl);
+ }
+
+ void dump(Formatter *f) const;
+ void decode_json(JSONObj *obj);
+ static void generate_test_instances(std::list<cls_replica_log_bound*>& ls);
+};
+WRITE_CLASS_ENCODER(cls_replica_log_bound)
+
+#endif /* CLS_REPLICA_LOG_TYPES_H_ */
Code Review / stor4nfv.git / blobdiff