2 * Ceph - scalable distributed file system
4 * This is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License version 2.1, as published by the Free Software
7 * Foundation. See file COPYING.
9 * Copyright Inktank 2013
12 #include "objclass/objclass.h"
14 #include "cls_replica_log_types.h"
15 #include "cls_replica_log_ops.h"
20 static const string replica_log_prefix = "rl_";
21 static const string replica_log_bounds = replica_log_prefix + "bounds";
23 static int get_bounds(cls_method_context_t hctx, cls_replica_log_bound& bound)
26 int rc = cls_cxx_map_get_val(hctx, replica_log_bounds, &bounds_bl);
32 bufferlist::iterator bounds_bl_i = bounds_bl.begin();
33 ::decode(bound, bounds_bl_i);
34 } catch (buffer::error& err) {
35 bound = cls_replica_log_bound();
36 CLS_LOG(0, "ERROR: get_bounds(): failed to decode on-disk bounds object");
43 static int write_bounds(cls_method_context_t hctx,
44 const cls_replica_log_bound& bound)
47 ::encode(bound, bounds_bl);
48 return cls_cxx_map_set_val(hctx, replica_log_bounds, &bounds_bl);
51 static int cls_replica_log_set(cls_method_context_t hctx,
52 bufferlist *in, bufferlist *out)
54 bufferlist::iterator in_iter = in->begin();
56 cls_replica_log_set_marker_op op;
58 ::decode(op, in_iter);
59 } catch (buffer::error& err) {
60 CLS_LOG(0, "ERROR: cls_replica_log_set(): failed to decode op");
64 cls_replica_log_bound bound;
65 int rc = get_bounds(hctx, bound);
66 if (rc < 0 && rc != -ENOENT) {
70 rc = bound.update_marker(op.marker);
75 return write_bounds(hctx, bound);
78 static int cls_replica_log_delete(cls_method_context_t hctx,
79 bufferlist *in, bufferlist *out)
81 bufferlist::iterator in_iter = in->begin();
83 cls_replica_log_delete_marker_op op;
85 ::decode(op, in_iter);
86 } catch (buffer::error& err) {
87 CLS_LOG(0, "ERROR: cls_replica_log_delete(): failed to decode op");
91 cls_replica_log_bound bound;
92 int rc = get_bounds(hctx, bound);
93 if (rc < 0 && rc != -ENOENT) {
97 rc = bound.delete_marker(op.entity_id);
102 return write_bounds(hctx, bound);
105 static int cls_replica_log_get(cls_method_context_t hctx,
106 bufferlist *in, bufferlist *out)
108 bufferlist::iterator in_iter = in->begin();
110 cls_replica_log_get_bounds_op op;
112 ::decode(op, in_iter);
113 } catch (buffer::error& err) {
114 CLS_LOG(0, "ERROR: cls_replica_log_get(): failed to decode op");
118 cls_replica_log_bound bound;
119 int rc = get_bounds(hctx, bound);
124 cls_replica_log_get_bounds_ret ret;
125 ret.oldest_time = bound.get_oldest_time();
126 ret.position_marker = bound.get_lowest_marker_bound();
127 bound.get_markers(ret.markers);
133 CLS_INIT(replica_log)
135 CLS_LOG(1, "Loaded replica log class!");
137 cls_handle_t h_class;
138 cls_method_handle_t h_replica_log_set;
139 cls_method_handle_t h_replica_log_delete;
140 cls_method_handle_t h_replica_log_get;
142 cls_register("replica_log", &h_class);
144 cls_register_cxx_method(h_class, "set", CLS_METHOD_RD | CLS_METHOD_WR,
145 cls_replica_log_set, &h_replica_log_set);
146 cls_register_cxx_method(h_class, "get", CLS_METHOD_RD,
147 cls_replica_log_get, &h_replica_log_get);
148 cls_register_cxx_method(h_class, "delete", CLS_METHOD_RD | CLS_METHOD_WR,
149 cls_replica_log_delete, &h_replica_log_delete);