+++ /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- utime_t item_timestamp; // the time stamp at which the item was outdated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