]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2013 Inktank Storage, Inc. | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public | |
10 | * License version 2, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
7c673cae FG |
15 | #include "json_spirit/json_spirit.h" |
16 | #include "common/debug.h" | |
17 | ||
18 | using namespace std; | |
19 | ||
20 | /** | |
21 | * Given a cmddesc like "foo baz name=bar,type=CephString", | |
22 | * return the prefix "foo baz". | |
23 | */ | |
24 | std::string cmddesc_get_prefix(const std::string &cmddesc) | |
25 | { | |
26 | stringstream ss(cmddesc); | |
27 | std::string word; | |
28 | std::ostringstream result; | |
29 | bool first = true; | |
30 | while (std::getline(ss, word, ' ')) { | |
31 | if (word.find_first_of(",=") != string::npos) { | |
32 | break; | |
33 | } | |
34 | ||
35 | if (!first) { | |
36 | result << " "; | |
37 | } | |
38 | result << word; | |
39 | first = false; | |
40 | } | |
41 | ||
42 | return result.str(); | |
43 | } | |
44 | ||
45 | /** | |
46 | * Read a command description list out of cmd, and dump it to f. | |
47 | * A signature description is a set of space-separated words; | |
48 | * see MonCommands.h for more info. | |
49 | */ | |
50 | ||
51 | void | |
52 | dump_cmd_to_json(Formatter *f, const string& cmd) | |
53 | { | |
54 | // put whole command signature in an already-opened container | |
55 | // elements are: "name", meaning "the typeless name that means a literal" | |
56 | // an object {} with key:value pairs representing an argument | |
57 | ||
7c673cae FG |
58 | stringstream ss(cmd); |
59 | std::string word; | |
60 | ||
61 | while (std::getline(ss, word, ' ')) { | |
7c673cae FG |
62 | // if no , or =, must be a plain word to put out |
63 | if (word.find_first_of(",=") == string::npos) { | |
64 | f->dump_string("arg", word); | |
65 | continue; | |
66 | } | |
67 | // Snarf up all the key=val,key=val pairs, put 'em in a dict. | |
68 | // no '=val' implies '=True'. | |
69 | std::stringstream argdesc(word); | |
70 | std::string keyval; | |
71 | std::map<std::string, std::string>desckv; | |
72 | // accumulate descriptor keywords in desckv | |
73 | ||
74 | while (std::getline(argdesc, keyval, ',')) { | |
75 | // key=value; key by itself implies value is bool true | |
76 | // name="name" means arg dict will be titled 'name' | |
77 | size_t pos = keyval.find('='); | |
78 | std::string key, val; | |
79 | if (pos != std::string::npos) { | |
80 | key = keyval.substr(0, pos); | |
81 | val = keyval.substr(pos+1); | |
82 | } else { | |
83 | key = keyval; | |
84 | val = true; | |
85 | } | |
86 | desckv.insert(std::pair<std::string, std::string> (key, val)); | |
87 | } | |
88 | // name the individual desc object based on the name key | |
89 | f->open_object_section(desckv["name"].c_str()); | |
90 | // dump all the keys including name into the array | |
91 | for (std::map<std::string, std::string>::iterator it = desckv.begin(); | |
92 | it != desckv.end(); ++it) { | |
93 | f->dump_string(it->first.c_str(), it->second); | |
94 | } | |
95 | f->close_section(); // attribute object for individual desc | |
96 | } | |
97 | } | |
98 | ||
99 | void | |
100 | dump_cmd_and_help_to_json(Formatter *jf, | |
101 | const string& secname, | |
102 | const string& cmdsig, | |
103 | const string& helptext) | |
104 | { | |
105 | jf->open_object_section(secname.c_str()); | |
106 | jf->open_array_section("sig"); | |
107 | dump_cmd_to_json(jf, cmdsig); | |
108 | jf->close_section(); // sig array | |
109 | jf->dump_string("help", helptext.c_str()); | |
110 | jf->close_section(); // cmd | |
111 | } | |
112 | ||
113 | void | |
114 | dump_cmddesc_to_json(Formatter *jf, | |
115 | const string& secname, | |
116 | const string& cmdsig, | |
117 | const string& helptext, | |
118 | const string& module, | |
119 | const string& perm, | |
120 | const string& avail, | |
121 | uint64_t flags) | |
122 | { | |
123 | jf->open_object_section(secname.c_str()); | |
124 | jf->open_array_section("sig"); | |
125 | dump_cmd_to_json(jf, cmdsig); | |
126 | jf->close_section(); // sig array | |
127 | jf->dump_string("help", helptext.c_str()); | |
128 | jf->dump_string("module", module.c_str()); | |
129 | jf->dump_string("perm", perm.c_str()); | |
130 | jf->dump_string("avail", avail.c_str()); | |
131 | jf->dump_int("flags", flags); | |
132 | jf->close_section(); // cmd | |
133 | } | |
134 | ||
135 | void cmdmap_dump(const cmdmap_t &cmdmap, Formatter *f) | |
136 | { | |
137 | assert(f != nullptr); | |
138 | ||
139 | class dump_visitor : public boost::static_visitor<void> | |
140 | { | |
141 | Formatter *f; | |
142 | std::string const &key; | |
143 | public: | |
144 | dump_visitor(Formatter *f_, std::string const &key_) | |
145 | : f(f_), key(key_) | |
146 | { | |
147 | } | |
148 | ||
149 | void operator()(const std::string &operand) const | |
150 | { | |
151 | f->dump_string(key.c_str(), operand); | |
152 | } | |
153 | ||
154 | void operator()(const bool &operand) const | |
155 | { | |
156 | f->dump_bool(key.c_str(), operand); | |
157 | } | |
158 | ||
159 | void operator()(const int64_t &operand) const | |
160 | { | |
161 | f->dump_int(key.c_str(), operand); | |
162 | } | |
163 | ||
164 | void operator()(const double &operand) const | |
165 | { | |
166 | f->dump_float(key.c_str(), operand); | |
167 | } | |
168 | ||
169 | void operator()(const std::vector<std::string> &operand) const | |
170 | { | |
171 | f->open_array_section(key.c_str()); | |
172 | for (const auto i : operand) { | |
173 | f->dump_string("item", i); | |
174 | } | |
175 | f->close_section(); | |
176 | } | |
177 | ||
178 | void operator()(const std::vector<int64_t> &operand) const | |
179 | { | |
180 | f->open_array_section(key.c_str()); | |
181 | for (const auto i : operand) { | |
182 | f->dump_int("item", i); | |
183 | } | |
184 | f->close_section(); | |
185 | } | |
c07f9fc5 FG |
186 | |
187 | void operator()(const std::vector<double> &operand) const | |
188 | { | |
189 | f->open_array_section(key.c_str()); | |
190 | for (const auto i : operand) { | |
191 | f->dump_float("item", i); | |
192 | } | |
193 | f->close_section(); | |
194 | } | |
7c673cae FG |
195 | }; |
196 | ||
197 | //f->open_object_section("cmdmap"); | |
198 | for (const auto &i : cmdmap) { | |
199 | boost::apply_visitor(dump_visitor(f, i.first), i.second); | |
200 | } | |
201 | //f->close_section(); | |
202 | } | |
203 | ||
204 | ||
205 | /** Parse JSON in vector cmd into a map from field to map of values | |
206 | * (use mValue/mObject) | |
207 | * 'cmd' should not disappear over lifetime of map | |
208 | * 'mapp' points to the caller's map | |
209 | * 'ss' captures any errors during JSON parsing; if function returns | |
210 | * false, ss is valid */ | |
211 | ||
212 | bool | |
213 | cmdmap_from_json(vector<string> cmd, map<string, cmd_vartype> *mapp, stringstream &ss) | |
214 | { | |
215 | json_spirit::mValue v; | |
216 | ||
217 | string fullcmd; | |
218 | // First, join all cmd strings | |
219 | for (vector<string>::iterator it = cmd.begin(); | |
220 | it != cmd.end(); ++it) | |
221 | fullcmd += *it; | |
222 | ||
223 | try { | |
224 | if (!json_spirit::read(fullcmd, v)) | |
225 | throw runtime_error("unparseable JSON " + fullcmd); | |
226 | if (v.type() != json_spirit::obj_type) | |
227 | throw(runtime_error("not JSON object " + fullcmd)); | |
228 | ||
229 | // allocate new mObject (map) to return | |
230 | // make sure all contents are simple types (not arrays or objects) | |
231 | json_spirit::mObject o = v.get_obj(); | |
232 | for (map<string, json_spirit::mValue>::iterator it = o.begin(); | |
233 | it != o.end(); ++it) { | |
234 | ||
235 | // ok, marshal it into our string->cmd_vartype map, or throw an | |
236 | // exception if it's not a simple datatype. This is kind of | |
237 | // annoying, since json_spirit has a boost::variant inside it | |
238 | // already, but it's not public. Oh well. | |
239 | ||
240 | switch (it->second.type()) { | |
241 | ||
242 | case json_spirit::obj_type: | |
243 | default: | |
244 | throw(runtime_error("JSON array/object not allowed " + fullcmd)); | |
245 | break; | |
246 | ||
247 | case json_spirit::array_type: | |
248 | { | |
249 | // array is a vector of values. Unpack it to a vector | |
c07f9fc5 | 250 | // of strings, doubles, or int64_t, the only types we handle. |
7c673cae FG |
251 | const vector<json_spirit::mValue>& spvals = it->second.get_array(); |
252 | if (spvals.empty()) { | |
253 | // if an empty array is acceptable, the caller should always check for | |
254 | // vector<string> if the expected value of "vector<int64_t>" in the | |
255 | // cmdmap is missing. | |
256 | (*mapp)[it->first] = vector<string>(); | |
257 | } else if (spvals.front().type() == json_spirit::str_type) { | |
258 | vector<string> outv; | |
259 | for (const auto& sv : spvals) { | |
260 | if (sv.type() != json_spirit::str_type) { | |
261 | throw(runtime_error("Can't handle arrays of multiple types")); | |
262 | } | |
263 | outv.push_back(sv.get_str()); | |
264 | } | |
265 | (*mapp)[it->first] = std::move(outv); | |
266 | } else if (spvals.front().type() == json_spirit::int_type) { | |
267 | vector<int64_t> outv; | |
268 | for (const auto& sv : spvals) { | |
269 | if (spvals.front().type() != json_spirit::int_type) { | |
270 | throw(runtime_error("Can't handle arrays of multiple types")); | |
271 | } | |
272 | outv.push_back(sv.get_int64()); | |
273 | } | |
274 | (*mapp)[it->first] = std::move(outv); | |
c07f9fc5 FG |
275 | } else if (spvals.front().type() == json_spirit::real_type) { |
276 | vector<double> outv; | |
277 | for (const auto& sv : spvals) { | |
278 | if (spvals.front().type() != json_spirit::real_type) { | |
279 | throw(runtime_error("Can't handle arrays of multiple types")); | |
280 | } | |
281 | outv.push_back(sv.get_real()); | |
282 | } | |
283 | (*mapp)[it->first] = std::move(outv); | |
7c673cae FG |
284 | } else { |
285 | throw(runtime_error("Can't handle arrays of types other than " | |
c07f9fc5 | 286 | "int, string, or double")); |
7c673cae FG |
287 | } |
288 | } | |
289 | break; | |
290 | case json_spirit::str_type: | |
291 | (*mapp)[it->first] = it->second.get_str(); | |
292 | break; | |
293 | ||
294 | case json_spirit::bool_type: | |
295 | (*mapp)[it->first] = it->second.get_bool(); | |
296 | break; | |
297 | ||
298 | case json_spirit::int_type: | |
299 | (*mapp)[it->first] = it->second.get_int64(); | |
300 | break; | |
301 | ||
302 | case json_spirit::real_type: | |
303 | (*mapp)[it->first] = it->second.get_real(); | |
304 | break; | |
305 | } | |
306 | } | |
307 | return true; | |
308 | } catch (runtime_error &e) { | |
309 | ss << e.what(); | |
310 | return false; | |
311 | } | |
312 | } | |
313 | ||
314 | class stringify_visitor : public boost::static_visitor<string> | |
315 | { | |
316 | public: | |
317 | template <typename T> | |
318 | string operator()(T &operand) const | |
319 | { | |
320 | ostringstream oss; | |
321 | oss << operand; | |
322 | return oss.str(); | |
323 | } | |
324 | }; | |
325 | ||
326 | string | |
327 | cmd_vartype_stringify(const cmd_vartype &v) | |
328 | { | |
329 | return boost::apply_visitor(stringify_visitor(), v); | |
330 | } | |
331 | ||
332 | ||
333 | void | |
31f18b77 | 334 | handle_bad_get(CephContext *cct, const string& k, const char *tname) |
7c673cae FG |
335 | { |
336 | ostringstream errstr; | |
337 | int status; | |
338 | const char *typestr = abi::__cxa_demangle(tname, 0, 0, &status); | |
339 | if (status != 0) | |
340 | typestr = tname; | |
341 | errstr << "bad boost::get: key " << k << " is not type " << typestr; | |
342 | lderr(cct) << errstr.str() << dendl; | |
343 | ||
344 | ostringstream oss; | |
345 | oss << BackTrace(1); | |
346 | lderr(cct) << oss.rdbuf() << dendl; | |
347 | if (status == 0) | |
348 | free((char *)typestr); | |
349 | } | |
31f18b77 FG |
350 | |
351 | long parse_pos_long(const char *s, std::ostream *pss) | |
352 | { | |
353 | if (*s == '-' || *s == '+') { | |
354 | if (pss) | |
355 | *pss << "expected numerical value, got: " << s; | |
356 | return -EINVAL; | |
357 | } | |
358 | ||
359 | string err; | |
360 | long r = strict_strtol(s, 10, &err); | |
361 | if ((r == 0) && !err.empty()) { | |
362 | if (pss) | |
363 | *pss << err; | |
364 | return -1; | |
365 | } | |
366 | if (r < 0) { | |
367 | if (pss) | |
368 | *pss << "unable to parse positive integer '" << s << "'"; | |
369 | return -1; | |
370 | } | |
371 | return r; | |
372 | } | |
373 | ||
374 | int parse_osd_id(const char *s, std::ostream *pss) | |
375 | { | |
376 | // osd.NNN? | |
377 | if (strncmp(s, "osd.", 4) == 0) { | |
378 | s += 4; | |
379 | } | |
380 | ||
381 | // NNN? | |
382 | ostringstream ss; | |
383 | long id = parse_pos_long(s, &ss); | |
384 | if (id < 0) { | |
385 | *pss << ss.str(); | |
386 | return id; | |
387 | } | |
388 | if (id > 0xffff) { | |
389 | *pss << "osd id " << id << " is too large"; | |
390 | return -ERANGE; | |
391 | } | |
392 | return id; | |
393 | } |