1 // -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
6 #include "objclass/objclass.h"
8 #include "cls_statelog_ops.h"
14 static string statelog_index_by_client_prefix = "1_";
15 static string statelog_index_by_object_prefix = "2_";
18 static int write_statelog_entry(cls_method_context_t hctx, const string& index, const cls_statelog_entry& entry)
23 int ret = cls_cxx_map_set_val(hctx, index, &bl);
30 static void get_index_by_client(const string& client_id, const string& op_id, string& index)
32 index = statelog_index_by_client_prefix;
33 index.append(client_id + "_" + op_id);
36 static void get_index_by_client(cls_statelog_entry& entry, string& index)
38 get_index_by_client(entry.client_id, entry.op_id, index);
41 static void get_index_by_object(const string& object, const string& op_id, string& index)
44 snprintf(buf, sizeof(buf), "%d_", (int)object.size());
46 index = statelog_index_by_object_prefix + buf; /* append object length to ensure uniqueness */
47 index.append(object + "_" + op_id);
50 static void get_index_by_object(cls_statelog_entry& entry, string& index)
52 get_index_by_object(entry.object, entry.op_id, index);
55 static int get_existing_entry(cls_method_context_t hctx, const string& client_id,
56 const string& op_id, const string& object,
57 cls_statelog_entry& entry)
59 if ((object.empty() && client_id.empty()) || op_id.empty()) {
64 if (!object.empty()) {
65 get_index_by_object(object, op_id, obj_index);
67 get_index_by_client(client_id, op_id, obj_index);
71 int rc = cls_cxx_map_get_val(hctx, obj_index, &bl);
73 CLS_LOG(0, "could not find entry %s", obj_index.c_str());
77 bufferlist::iterator iter = bl.begin();
78 ::decode(entry, iter);
79 } catch (buffer::error& err) {
80 CLS_LOG(0, "ERROR: failed to decode entry %s", obj_index.c_str());
84 if ((!object.empty() && entry.object != object) ||
85 (!client_id.empty() && entry.client_id != client_id)){
86 /* ouch, we were passed inconsistent client_id / object */
87 CLS_LOG(0, "data mismatch: object=%s client_id=%s entry: object=%s client_id=%s",
88 object.c_str(), client_id.c_str(), entry.object.c_str(), entry.client_id.c_str());
95 static int cls_statelog_add(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
97 bufferlist::iterator in_iter = in->begin();
99 cls_statelog_add_op op;
101 ::decode(op, in_iter);
102 } catch (buffer::error& err) {
103 CLS_LOG(1, "ERROR: cls_statelog_add_op(): failed to decode op");
107 for (list<cls_statelog_entry>::iterator iter = op.entries.begin();
108 iter != op.entries.end(); ++iter) {
109 cls_statelog_entry& entry = *iter;
111 string index_by_client;
113 get_index_by_client(entry, index_by_client);
115 CLS_LOG(0, "storing entry by client/op at %s", index_by_client.c_str());
117 int ret = write_statelog_entry(hctx, index_by_client, entry);
123 get_index_by_object(entry, index_by_obj);
125 CLS_LOG(0, "storing entry by object at %s", index_by_obj.c_str());
126 ret = write_statelog_entry(hctx, index_by_obj, entry);
135 static int cls_statelog_list(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
137 bufferlist::iterator in_iter = in->begin();
139 cls_statelog_list_op op;
141 ::decode(op, in_iter);
142 } catch (buffer::error& err) {
143 CLS_LOG(1, "ERROR: cls_statelog_list_op(): failed to decode op");
147 map<string, bufferlist> keys;
152 if (!op.client_id.empty()) {
153 get_index_by_client(op.client_id, op.op_id, match_prefix);
154 } else if (!op.object.empty()) {
155 get_index_by_object(op.object, op.op_id, match_prefix);
157 match_prefix = statelog_index_by_object_prefix;
160 if (op.marker.empty()) {
161 from_index = match_prefix;
163 from_index = op.marker;
166 #define MAX_ENTRIES 1000
167 size_t max_entries = op.max_entries;
168 if (!max_entries || max_entries > MAX_ENTRIES)
169 max_entries = MAX_ENTRIES;
171 cls_statelog_list_ret ret;
173 int rc = cls_cxx_map_get_vals(hctx, from_index, match_prefix, max_entries, &keys, &ret.truncated);
177 CLS_LOG(20, "from_index=%s match_prefix=%s", from_index.c_str(), match_prefix.c_str());
179 list<cls_statelog_entry>& entries = ret.entries;
180 map<string, bufferlist>::iterator iter = keys.begin();
184 for (; iter != keys.end(); ++iter) {
185 const string& index = iter->first;
188 bufferlist& bl = iter->second;
189 bufferlist::iterator biter = bl.begin();
191 cls_statelog_entry e;
193 entries.push_back(e);
194 } catch (buffer::error& err) {
195 CLS_LOG(0, "ERROR: cls_statelog_list: could not decode entry, index=%s", index.c_str());
208 static int cls_statelog_remove(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
210 bufferlist::iterator in_iter = in->begin();
212 cls_statelog_remove_op op;
214 ::decode(op, in_iter);
215 } catch (buffer::error& err) {
216 CLS_LOG(1, "ERROR: cls_statelog_remove_op(): failed to decode op");
220 cls_statelog_entry entry;
222 int rc = get_existing_entry(hctx, op.client_id, op.op_id, op.object, entry);
227 get_index_by_object(entry.object, entry.op_id, obj_index);
229 rc = cls_cxx_map_remove_key(hctx, obj_index);
231 CLS_LOG(0, "ERROR: failed to remove key");
236 get_index_by_client(entry.client_id, entry.op_id, client_index);
238 rc = cls_cxx_map_remove_key(hctx, client_index);
240 CLS_LOG(0, "ERROR: failed to remove key");
247 static int cls_statelog_check_state(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
249 bufferlist::iterator in_iter = in->begin();
251 cls_statelog_check_state_op op;
253 ::decode(op, in_iter);
254 } catch (buffer::error& err) {
255 CLS_LOG(1, "ERROR: cls_statelog_check_state_op(): failed to decode op");
259 if (op.object.empty() || op.op_id.empty()) {
260 CLS_LOG(0, "object name or op id not specified");
265 cls_statelog_entry entry;
267 int rc = get_existing_entry(hctx, op.client_id, op.op_id, op.object, entry);
271 if (entry.state != op.state)
279 CLS_LOG(1, "Loaded log class!");
281 cls_handle_t h_class;
282 cls_method_handle_t h_statelog_add;
283 cls_method_handle_t h_statelog_list;
284 cls_method_handle_t h_statelog_remove;
285 cls_method_handle_t h_statelog_check_state;
287 cls_register("statelog", &h_class);
290 cls_register_cxx_method(h_class, "add", CLS_METHOD_RD | CLS_METHOD_WR, cls_statelog_add, &h_statelog_add);
291 cls_register_cxx_method(h_class, "list", CLS_METHOD_RD, cls_statelog_list, &h_statelog_list);
292 cls_register_cxx_method(h_class, "remove", CLS_METHOD_RD | CLS_METHOD_WR, cls_statelog_remove, &h_statelog_remove);
293 cls_register_cxx_method(h_class, "check_state", CLS_METHOD_RD, cls_statelog_check_state, &h_statelog_check_state);