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1 | // -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #include <iostream> | |
5 | ||
6 | #include <string.h> | |
7 | #include <stdlib.h> | |
8 | #include <errno.h> | |
9 | ||
10 | #include "include/types.h" | |
11 | #include "include/utime.h" | |
12 | #include "objclass/objclass.h" | |
13 | ||
14 | #include "cls_timeindex_types.h" | |
15 | #include "cls_timeindex_ops.h" | |
16 | ||
17 | #include "global/global_context.h" | |
18 | #include "include/compat.h" | |
19 | ||
20 | CLS_VER(1,0) | |
21 | CLS_NAME(timeindex) | |
22 | ||
23 | static const size_t MAX_LIST_ENTRIES = 1000; | |
24 | static const size_t MAX_TRIM_ENTRIES = 1000; | |
25 | ||
26 | static const string TIMEINDEX_PREFIX = "1_"; | |
27 | ||
28 | static void get_index_time_prefix(const utime_t& ts, | |
29 | string& index) | |
30 | { | |
31 | char buf[32]; | |
32 | ||
33 | snprintf(buf, sizeof(buf), "%s%010ld.%06ld_", TIMEINDEX_PREFIX.c_str(), | |
34 | (long)ts.sec(), (long)ts.usec()); | |
35 | buf[sizeof(buf) - 1] = '\0'; | |
36 | ||
37 | index = buf; | |
38 | } | |
39 | ||
40 | static void get_index(cls_method_context_t hctx, | |
41 | const utime_t& key_ts, | |
42 | const string& key_ext, | |
43 | string& index) | |
44 | { | |
45 | get_index_time_prefix(key_ts, index); | |
46 | index.append(key_ext); | |
47 | } | |
48 | ||
49 | static int parse_index(const string& index, | |
50 | utime_t& key_ts, | |
51 | string& key_ext) | |
52 | { | |
53 | int sec, usec; | |
54 | char keyext[256]; | |
55 | ||
56 | int ret = sscanf(index.c_str(), "1_%d.%d_%255s", &sec, &usec, keyext); | |
57 | ||
58 | key_ts = utime_t(sec, usec); | |
59 | key_ext = string(keyext); | |
60 | return ret; | |
61 | } | |
62 | ||
63 | static int cls_timeindex_add(cls_method_context_t hctx, | |
64 | bufferlist * const in, | |
65 | bufferlist * const out) | |
66 | { | |
67 | bufferlist::iterator in_iter = in->begin(); | |
68 | ||
69 | cls_timeindex_add_op op; | |
70 | try { | |
71 | ::decode(op, in_iter); | |
72 | } catch (buffer::error& err) { | |
73 | CLS_LOG(1, "ERROR: cls_timeindex_add_op(): failed to decode op"); | |
74 | return -EINVAL; | |
75 | } | |
76 | ||
77 | for (list<cls_timeindex_entry>::iterator iter = op.entries.begin(); | |
78 | iter != op.entries.end(); | |
79 | ++iter) { | |
80 | cls_timeindex_entry& entry = *iter; | |
81 | ||
82 | string index; | |
83 | get_index(hctx, entry.key_ts, entry.key_ext, index); | |
84 | ||
85 | CLS_LOG(20, "storing entry at %s", index.c_str()); | |
86 | ||
87 | int ret = cls_cxx_map_set_val(hctx, index, &entry.value); | |
88 | if (ret < 0) { | |
89 | return ret; | |
90 | } | |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int cls_timeindex_list(cls_method_context_t hctx, | |
97 | bufferlist * const in, | |
98 | bufferlist * const out) | |
99 | { | |
100 | bufferlist::iterator in_iter = in->begin(); | |
101 | ||
102 | cls_timeindex_list_op op; | |
103 | try { | |
104 | ::decode(op, in_iter); | |
105 | } catch (buffer::error& err) { | |
106 | CLS_LOG(1, "ERROR: cls_timeindex_list_op(): failed to decode op"); | |
107 | return -EINVAL; | |
108 | } | |
109 | ||
110 | map<string, bufferlist> keys; | |
111 | ||
112 | string from_index; | |
113 | string to_index; | |
114 | ||
115 | if (op.marker.empty()) { | |
116 | get_index_time_prefix(op.from_time, from_index); | |
117 | } else { | |
118 | from_index = op.marker; | |
119 | } | |
120 | const bool use_time_boundary = (op.to_time >= op.from_time); | |
121 | ||
122 | if (use_time_boundary) { | |
123 | get_index_time_prefix(op.to_time, to_index); | |
124 | } | |
125 | ||
126 | size_t max_entries = op.max_entries; | |
127 | if (max_entries > MAX_LIST_ENTRIES) { | |
128 | max_entries = MAX_LIST_ENTRIES; | |
129 | } | |
130 | ||
131 | int rc = cls_cxx_map_get_vals(hctx, from_index, TIMEINDEX_PREFIX, | |
132 | max_entries + 1, &keys); | |
133 | if (rc < 0) { | |
134 | return rc; | |
135 | } | |
136 | ||
137 | cls_timeindex_list_ret ret; | |
138 | ||
139 | list<cls_timeindex_entry>& entries = ret.entries; | |
140 | map<string, bufferlist>::iterator iter = keys.begin(); | |
141 | ||
142 | bool done = false; | |
143 | string marker; | |
144 | ||
145 | for (size_t i = 0; i < max_entries && iter != keys.end(); ++i, ++iter) { | |
146 | const string& index = iter->first; | |
147 | bufferlist& bl = iter->second; | |
148 | ||
149 | marker = index; | |
150 | if (use_time_boundary && index.compare(0, to_index.size(), to_index) >= 0) { | |
151 | CLS_LOG(20, "DEBUG: cls_timeindex_list: finishing on to_index=%s", | |
152 | to_index.c_str()); | |
153 | done = true; | |
154 | break; | |
155 | } | |
156 | ||
157 | cls_timeindex_entry e; | |
158 | ||
159 | if (parse_index(index, e.key_ts, e.key_ext) < 0) { | |
160 | CLS_LOG(0, "ERROR: cls_timeindex_list: could not parse index=%s", | |
161 | index.c_str()); | |
162 | } else { | |
163 | CLS_LOG(20, "DEBUG: cls_timeindex_list: index=%s, key_ext=%s, bl.len = %d", | |
164 | index.c_str(), e.key_ext.c_str(), bl.length()); | |
165 | e.value = bl; | |
166 | entries.push_back(e); | |
167 | } | |
168 | } | |
169 | ||
170 | if (iter == keys.end()) { | |
171 | done = true; | |
172 | } | |
173 | ||
174 | ret.marker = marker; | |
175 | ret.truncated = !done; | |
176 | ||
177 | ::encode(ret, *out); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | ||
183 | static int cls_timeindex_trim(cls_method_context_t hctx, | |
184 | bufferlist * const in, | |
185 | bufferlist * const out) | |
186 | { | |
187 | bufferlist::iterator in_iter = in->begin(); | |
188 | ||
189 | cls_timeindex_trim_op op; | |
190 | try { | |
191 | ::decode(op, in_iter); | |
192 | } catch (buffer::error& err) { | |
193 | CLS_LOG(1, "ERROR: cls_timeindex_trim: failed to decode entry"); | |
194 | return -EINVAL; | |
195 | } | |
196 | ||
197 | map<string, bufferlist> keys; | |
198 | ||
199 | string from_index; | |
200 | string to_index; | |
201 | ||
202 | if (op.from_marker.empty()) { | |
203 | get_index_time_prefix(op.from_time, from_index); | |
204 | } else { | |
205 | from_index = op.from_marker; | |
206 | } | |
207 | ||
208 | if (op.to_marker.empty()) { | |
209 | get_index_time_prefix(op.to_time, to_index); | |
210 | } else { | |
211 | to_index = op.to_marker; | |
212 | } | |
213 | ||
214 | int rc = cls_cxx_map_get_vals(hctx, from_index, TIMEINDEX_PREFIX, | |
215 | MAX_TRIM_ENTRIES, &keys); | |
216 | if (rc < 0) { | |
217 | return rc; | |
218 | } | |
219 | ||
220 | map<string, bufferlist>::iterator iter = keys.begin(); | |
221 | ||
222 | bool removed = false; | |
223 | for (size_t i = 0; i < MAX_TRIM_ENTRIES && iter != keys.end(); ++i, ++iter) { | |
224 | const string& index = iter->first; | |
225 | ||
226 | CLS_LOG(20, "index=%s to_index=%s", index.c_str(), to_index.c_str()); | |
227 | ||
228 | if (index.compare(0, to_index.size(), to_index) > 0) { | |
229 | CLS_LOG(20, "DEBUG: cls_timeindex_trim: finishing on to_index=%s", | |
230 | to_index.c_str()); | |
231 | break; | |
232 | } | |
233 | ||
234 | CLS_LOG(20, "removing key: index=%s", index.c_str()); | |
235 | ||
236 | int rc = cls_cxx_map_remove_key(hctx, index); | |
237 | if (rc < 0) { | |
238 | CLS_LOG(1, "ERROR: cls_cxx_map_remove_key failed rc=%d", rc); | |
239 | return rc; | |
240 | } | |
241 | ||
242 | removed = true; | |
243 | } | |
244 | ||
245 | if (!removed) { | |
246 | return -ENODATA; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | CLS_INIT(timeindex) | |
253 | { | |
254 | CLS_LOG(1, "Loaded timeindex class!"); | |
255 | ||
256 | cls_handle_t h_class; | |
257 | cls_method_handle_t h_timeindex_add; | |
258 | cls_method_handle_t h_timeindex_list; | |
259 | cls_method_handle_t h_timeindex_trim; | |
260 | ||
261 | cls_register("timeindex", &h_class); | |
262 | ||
263 | /* timeindex */ | |
264 | cls_register_cxx_method(h_class, "add", CLS_METHOD_RD | CLS_METHOD_WR, | |
265 | cls_timeindex_add, &h_timeindex_add); | |
266 | cls_register_cxx_method(h_class, "list", CLS_METHOD_RD, | |
267 | cls_timeindex_list, &h_timeindex_list); | |
268 | cls_register_cxx_method(h_class, "trim", CLS_METHOD_RD | CLS_METHOD_WR, | |
269 | cls_timeindex_trim, &h_timeindex_trim); | |
270 | ||
271 | return; | |
272 | } | |
273 |