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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) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
7c673cae FG |
15 | #include "common/ceph_argparse.h" |
16 | #include "common/common_init.h" | |
17 | #include "common/config.h" | |
18 | #include "common/config_validators.h" | |
7c673cae | 19 | #include "include/str_list.h" |
7c673cae | 20 | #include "include/stringify.h" |
7c673cae FG |
21 | #include "osd/osd_types.h" |
22 | #include "common/errno.h" | |
23 | #include "common/hostname.h" | |
24 | ||
7c673cae | 25 | #include <boost/type_traits.hpp> |
7c673cae FG |
26 | |
27 | /* Don't use standard Ceph logging in this file. | |
28 | * We can't use logging until it's initialized, and a lot of the necessary | |
29 | * initialization happens here. | |
30 | */ | |
31 | #undef dout | |
32 | #undef ldout | |
33 | #undef pdout | |
34 | #undef derr | |
35 | #undef lderr | |
36 | #undef generic_dout | |
37 | #undef dendl | |
38 | ||
39 | using std::map; | |
40 | using std::list; | |
7c673cae FG |
41 | using std::ostringstream; |
42 | using std::pair; | |
7c673cae FG |
43 | using std::string; |
44 | ||
45 | const char *CEPH_CONF_FILE_DEFAULT = "$data_dir/config, /etc/ceph/$cluster.conf, ~/.ceph/$cluster.conf, $cluster.conf" | |
46 | #if defined(__FreeBSD__) | |
47 | ", /usr/local/etc/ceph/$cluster.conf" | |
48 | #endif | |
49 | ; | |
50 | ||
51 | #define _STR(x) #x | |
52 | #define STRINGIFY(x) _STR(x) | |
53 | ||
54 | int ceph_resolve_file_search(const std::string& filename_list, | |
55 | std::string& result) | |
56 | { | |
57 | list<string> ls; | |
58 | get_str_list(filename_list, ls); | |
59 | ||
60 | int ret = -ENOENT; | |
61 | list<string>::iterator iter; | |
62 | for (iter = ls.begin(); iter != ls.end(); ++iter) { | |
63 | int fd = ::open(iter->c_str(), O_RDONLY); | |
64 | if (fd < 0) { | |
65 | ret = -errno; | |
66 | continue; | |
67 | } | |
68 | close(fd); | |
69 | result = *iter; | |
70 | return 0; | |
71 | } | |
72 | ||
73 | return ret; | |
74 | } | |
75 | ||
76 | #define OPTION(name, type, def_val) | |
77 | #define OPTION_VALIDATOR(name) \ | |
78 | struct md_config_t::option_##name##_t { \ | |
79 | typedef decltype(md_config_t::name) type; \ | |
80 | }; | |
81 | #define SAFE_OPTION(name, type, def_val) | |
82 | #define SUBSYS(name, log, gather) | |
83 | #define DEFAULT_SUBSYS(log, gather) | |
84 | #include "common/config_opts.h" | |
85 | #undef OPTION | |
86 | #undef OPTION_VALIDATOR | |
87 | #undef SAFE_OPTION | |
88 | #undef SUBSYS | |
89 | #undef DEFAULT_SUBSYS | |
90 | ||
91 | namespace { | |
92 | ||
93 | template <typename T> | |
94 | typename std::enable_if<!std::is_destructible<T>::value, | |
95 | md_config_t::validator_t>::type create_validator() { | |
96 | return md_config_t::validator_t(); | |
97 | } | |
98 | ||
99 | template <typename T> | |
100 | typename std::enable_if<std::is_destructible<T>::value, | |
101 | md_config_t::validator_t>::type create_validator() { | |
102 | // if T is defined (and not just forward declared), it implies | |
103 | // that a validator function exists. use a dummy typed pointer to | |
104 | // pick the correct validator function | |
105 | return [](std::string *value, std::string *error_message) { | |
106 | return ::validate(reinterpret_cast<T*>(0), value, error_message); | |
107 | }; | |
108 | } | |
109 | ||
110 | } // anonymous namespace | |
111 | ||
112 | md_config_t::md_config_t() | |
113 | : cluster(""), | |
114 | ||
115 | #define OPTION_OPT_INT(name, def_val) name(def_val), | |
116 | #define OPTION_OPT_LONGLONG(name, def_val) name((1LL) * def_val), | |
117 | #define OPTION_OPT_STR(name, def_val) name(def_val), | |
118 | #define OPTION_OPT_DOUBLE(name, def_val) name(def_val), | |
119 | #define OPTION_OPT_FLOAT(name, def_val) name(def_val), | |
120 | #define OPTION_OPT_BOOL(name, def_val) name(def_val), | |
121 | #define OPTION_OPT_ADDR(name, def_val) name(def_val), | |
122 | #define OPTION_OPT_U32(name, def_val) name(def_val), | |
123 | #define OPTION_OPT_U64(name, def_val) name(((uint64_t)1) * def_val), | |
124 | #define OPTION_OPT_UUID(name, def_val) name(def_val), | |
125 | #define OPTION(name, type, def_val) OPTION_##type(name, def_val) | |
126 | #define OPTION_VALIDATOR(name) | |
127 | #define SAFE_OPTION(name, type, def_val) OPTION(name, type, def_val) | |
128 | #define SUBSYS(name, log, gather) | |
129 | #define DEFAULT_SUBSYS(log, gather) | |
130 | #include "common/config_opts.h" | |
131 | #undef OPTION_OPT_INT | |
132 | #undef OPTION_OPT_LONGLONG | |
133 | #undef OPTION_OPT_STR | |
134 | #undef OPTION_OPT_DOUBLE | |
135 | #undef OPTION_OPT_FLOAT | |
136 | #undef OPTION_OPT_BOOL | |
137 | #undef OPTION_OPT_ADDR | |
138 | #undef OPTION_OPT_U32 | |
139 | #undef OPTION_OPT_U64 | |
140 | #undef OPTION_OPT_UUID | |
141 | #undef OPTION | |
142 | #undef OPTION_VALIDATOR | |
143 | #undef SAFE_OPTION | |
144 | #undef SUBSYS | |
145 | #undef DEFAULT_SUBSYS | |
146 | lock("md_config_t", true, false) | |
147 | { | |
148 | static const std::vector<md_config_t::config_option> s_config_options = { | |
149 | #define OPTION4(name, type, def_val, safe) \ | |
150 | config_option{ STRINGIFY(name), type, &md_config_t::name, safe, \ | |
151 | create_validator<option_##name##_t>() }, | |
152 | #define OPTION(name, type, def_val) OPTION4(name, type, def_val, false) | |
153 | #define OPTION_VALIDATOR(name) | |
154 | #define SAFE_OPTION(name, type, def_val) OPTION4(name, type, def_val, true) | |
155 | #define SUBSYS(name, log, gather) | |
156 | #define DEFAULT_SUBSYS(log, gather) | |
157 | #include "common/config_opts.h" | |
158 | #undef OPTION4 | |
159 | #undef OPTION | |
160 | #undef OPTION_VALIDATOR | |
161 | #undef SAFE_OPTION | |
162 | #undef SUBSYS | |
163 | #undef DEFAULT_SUBSYS | |
164 | }; | |
165 | static std::shared_ptr<decltype(s_config_options)> | |
166 | s_tbl(new std::vector<md_config_t::config_option>(std::move(s_config_options))); | |
167 | config_options = s_tbl; | |
168 | ||
169 | validate_default_settings(); | |
170 | init_subsys(); | |
171 | } | |
172 | ||
173 | void md_config_t::init_subsys() | |
174 | { | |
175 | #define SUBSYS(name, log, gather) \ | |
176 | subsys.add(ceph_subsys_##name, STRINGIFY(name), log, gather); | |
177 | #define DEFAULT_SUBSYS(log, gather) \ | |
178 | subsys.add(ceph_subsys_, "none", log, gather); | |
179 | #define OPTION(a, b, c) | |
180 | #define OPTION_VALIDATOR(a) | |
181 | #define SAFE_OPTION(a, b, c) | |
182 | #include "common/config_opts.h" | |
183 | #undef OPTION | |
184 | #undef OPTION_VALIDATOR | |
185 | #undef SAFE_OPTION | |
186 | #undef SUBSYS | |
187 | #undef DEFAULT_SUBSYS | |
188 | } | |
189 | ||
190 | md_config_t::~md_config_t() | |
191 | { | |
192 | } | |
193 | ||
194 | void md_config_t::add_observer(md_config_obs_t* observer_) | |
195 | { | |
196 | Mutex::Locker l(lock); | |
197 | const char **keys = observer_->get_tracked_conf_keys(); | |
198 | for (const char ** k = keys; *k; ++k) { | |
199 | obs_map_t::value_type val(*k, observer_); | |
200 | observers.insert(val); | |
201 | } | |
202 | } | |
203 | ||
204 | void md_config_t::remove_observer(md_config_obs_t* observer_) | |
205 | { | |
206 | Mutex::Locker l(lock); | |
207 | bool found_obs = false; | |
208 | for (obs_map_t::iterator o = observers.begin(); o != observers.end(); ) { | |
209 | if (o->second == observer_) { | |
210 | observers.erase(o++); | |
211 | found_obs = true; | |
212 | } | |
213 | else { | |
214 | ++o; | |
215 | } | |
216 | } | |
217 | assert(found_obs); | |
218 | } | |
219 | ||
220 | int md_config_t::parse_config_files(const char *conf_files, | |
221 | std::ostream *warnings, | |
222 | int flags) | |
223 | { | |
224 | Mutex::Locker l(lock); | |
225 | ||
226 | if (internal_safe_to_start_threads) | |
227 | return -ENOSYS; | |
228 | ||
229 | if (!cluster.size() && !conf_files) { | |
230 | /* | |
231 | * set the cluster name to 'ceph' when neither cluster name nor | |
232 | * configuration file are specified. | |
233 | */ | |
234 | cluster = "ceph"; | |
235 | } | |
236 | ||
237 | if (!conf_files) { | |
238 | const char *c = getenv("CEPH_CONF"); | |
239 | if (c) { | |
240 | conf_files = c; | |
241 | } | |
242 | else { | |
243 | if (flags & CINIT_FLAG_NO_DEFAULT_CONFIG_FILE) | |
244 | return 0; | |
245 | conf_files = CEPH_CONF_FILE_DEFAULT; | |
246 | } | |
247 | } | |
248 | ||
249 | std::list<std::string> cfl; | |
250 | get_str_list(conf_files, cfl); | |
251 | ||
252 | auto p = cfl.begin(); | |
253 | while (p != cfl.end()) { | |
254 | // expand $data_dir? | |
255 | string &s = *p; | |
256 | if (s.find("$data_dir") != string::npos) { | |
257 | if (data_dir_option.length()) { | |
258 | list<config_option const *> stack; | |
259 | expand_meta(s, NULL, stack, warnings); | |
260 | p++; | |
261 | } else { | |
262 | cfl.erase(p++); // ignore this item | |
263 | } | |
264 | } else { | |
265 | ++p; | |
266 | } | |
267 | } | |
268 | return parse_config_files_impl(cfl, warnings); | |
269 | } | |
270 | ||
271 | int md_config_t::parse_config_files_impl(const std::list<std::string> &conf_files, | |
272 | std::ostream *warnings) | |
273 | { | |
274 | assert(lock.is_locked()); | |
275 | ||
276 | // open new conf | |
277 | list<string>::const_iterator c; | |
278 | for (c = conf_files.begin(); c != conf_files.end(); ++c) { | |
279 | cf.clear(); | |
280 | string fn = *c; | |
281 | expand_meta(fn, warnings); | |
282 | int ret = cf.parse_file(fn.c_str(), &parse_errors, warnings); | |
283 | if (ret == 0) | |
284 | break; | |
285 | else if (ret != -ENOENT) | |
286 | return ret; | |
287 | } | |
288 | // it must have been all ENOENTs, that's the only way we got here | |
289 | if (c == conf_files.end()) | |
290 | return -ENOENT; | |
291 | ||
292 | if (cluster.size() == 0) { | |
293 | /* | |
294 | * If cluster name is not set yet, use the prefix of the | |
295 | * basename of configuration file as cluster name. | |
296 | */ | |
297 | auto start = c->rfind('/') + 1; | |
298 | auto end = c->find(".conf", start); | |
299 | if (end == c->npos) { | |
300 | /* | |
301 | * If the configuration file does not follow $cluster.conf | |
302 | * convention, we do the last try and assign the cluster to | |
303 | * 'ceph'. | |
304 | */ | |
305 | cluster = "ceph"; | |
306 | } else { | |
307 | cluster = c->substr(start, end - start); | |
308 | } | |
309 | } | |
310 | ||
311 | std::vector <std::string> my_sections; | |
312 | _get_my_sections(my_sections); | |
313 | for (auto& opt: *config_options) { | |
314 | std::string val; | |
315 | int ret = _get_val_from_conf_file(my_sections, opt.name, val, false); | |
316 | if (ret == 0) { | |
317 | std::string error_message; | |
318 | int r = set_val_impl(val, &opt, &error_message); | |
319 | if (warnings != nullptr && (r != 0 || !error_message.empty())) { | |
320 | *warnings << "parse error setting '" << opt.name << "' to '" << val | |
321 | << "'"; | |
322 | if (!error_message.empty()) { | |
323 | *warnings << " (" << error_message << ")"; | |
324 | } | |
325 | *warnings << std::endl; | |
326 | } | |
327 | } | |
328 | } | |
329 | ||
330 | // subsystems? | |
331 | for (int o = 0; o < subsys.get_num(); o++) { | |
332 | std::string as_option("debug_"); | |
333 | as_option += subsys.get_name(o); | |
334 | std::string val; | |
335 | int ret = _get_val_from_conf_file(my_sections, as_option.c_str(), val, false); | |
336 | if (ret == 0) { | |
337 | int log, gather; | |
338 | int r = sscanf(val.c_str(), "%d/%d", &log, &gather); | |
339 | if (r >= 1) { | |
340 | if (r < 2) | |
341 | gather = log; | |
342 | // cout << "config subsys " << subsys.get_name(o) << " log " << log << " gather " << gather << std::endl; | |
343 | subsys.set_log_level(o, log); | |
344 | subsys.set_gather_level(o, gather); | |
345 | } | |
346 | } | |
347 | } | |
348 | ||
349 | // Warn about section names that look like old-style section names | |
350 | std::deque < std::string > old_style_section_names; | |
351 | for (ConfFile::const_section_iter_t s = cf.sections_begin(); | |
352 | s != cf.sections_end(); ++s) { | |
353 | const string &str(s->first); | |
354 | if (((str.find("mds") == 0) || (str.find("mon") == 0) || | |
355 | (str.find("osd") == 0)) && (str.size() > 3) && (str[3] != '.')) { | |
356 | old_style_section_names.push_back(str); | |
357 | } | |
358 | } | |
359 | if (!old_style_section_names.empty()) { | |
360 | ostringstream oss; | |
361 | cerr << "ERROR! old-style section name(s) found: "; | |
362 | string sep; | |
363 | for (std::deque < std::string >::const_iterator os = old_style_section_names.begin(); | |
364 | os != old_style_section_names.end(); ++os) { | |
365 | cerr << sep << *os; | |
366 | sep = ", "; | |
367 | } | |
368 | cerr << ". Please use the new style section names that include a period."; | |
369 | } | |
370 | return 0; | |
371 | } | |
372 | ||
373 | void md_config_t::parse_env() | |
374 | { | |
375 | Mutex::Locker l(lock); | |
376 | if (internal_safe_to_start_threads) | |
377 | return; | |
378 | if (getenv("CEPH_KEYRING")) { | |
379 | set_val_or_die("keyring", getenv("CEPH_KEYRING")); | |
380 | } | |
381 | } | |
382 | ||
383 | void md_config_t::show_config(std::ostream& out) | |
384 | { | |
385 | Mutex::Locker l(lock); | |
386 | _show_config(&out, NULL); | |
387 | } | |
388 | ||
389 | void md_config_t::show_config(Formatter *f) | |
390 | { | |
391 | Mutex::Locker l(lock); | |
392 | _show_config(NULL, f); | |
393 | } | |
394 | ||
395 | void md_config_t::_show_config(std::ostream *out, Formatter *f) | |
396 | { | |
397 | if (out) { | |
398 | *out << "name = " << name << std::endl; | |
399 | *out << "cluster = " << cluster << std::endl; | |
400 | } | |
401 | if (f) { | |
402 | f->dump_string("name", stringify(name)); | |
403 | f->dump_string("cluster", cluster); | |
404 | } | |
405 | for (int o = 0; o < subsys.get_num(); o++) { | |
406 | if (out) | |
407 | *out << "debug_" << subsys.get_name(o) | |
408 | << " = " << subsys.get_log_level(o) | |
409 | << "/" << subsys.get_gather_level(o) << std::endl; | |
410 | if (f) { | |
411 | ostringstream ss; | |
412 | std::string debug_name = "debug_"; | |
413 | debug_name += subsys.get_name(o); | |
414 | ss << subsys.get_log_level(o) | |
415 | << "/" << subsys.get_gather_level(o); | |
416 | f->dump_string(debug_name.c_str(), ss.str()); | |
417 | } | |
418 | } | |
419 | for (auto& opt: *config_options) { | |
420 | char *buf; | |
421 | _get_val(opt.name, &buf, -1); | |
422 | if (out) | |
423 | *out << opt.name << " = " << buf << std::endl; | |
424 | if (f) | |
425 | f->dump_string(opt.name, buf); | |
426 | free(buf); | |
427 | } | |
428 | } | |
429 | ||
430 | int md_config_t::parse_argv(std::vector<const char*>& args) | |
431 | { | |
432 | Mutex::Locker l(lock); | |
433 | if (internal_safe_to_start_threads) { | |
434 | return -ENOSYS; | |
435 | } | |
436 | ||
437 | bool show_config = false; | |
438 | bool show_config_value = false; | |
439 | string show_config_value_arg; | |
440 | ||
441 | // In this function, don't change any parts of the configuration directly. | |
442 | // Instead, use set_val to set them. This will allow us to send the proper | |
443 | // observer notifications later. | |
444 | std::string val; | |
445 | for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ) { | |
446 | if (strcmp(*i, "--") == 0) { | |
447 | /* Normally we would use ceph_argparse_double_dash. However, in this | |
448 | * function we *don't* want to remove the double dash, because later | |
449 | * argument parses will still need to see it. */ | |
450 | break; | |
451 | } | |
452 | else if (ceph_argparse_flag(args, i, "--show_conf", (char*)NULL)) { | |
453 | cerr << cf << std::endl; | |
454 | _exit(0); | |
455 | } | |
456 | else if (ceph_argparse_flag(args, i, "--show_config", (char*)NULL)) { | |
457 | show_config = true; | |
458 | } | |
459 | else if (ceph_argparse_witharg(args, i, &val, "--show_config_value", (char*)NULL)) { | |
460 | show_config_value = true; | |
461 | show_config_value_arg = val; | |
462 | } | |
463 | else if (ceph_argparse_flag(args, i, "--foreground", "-f", (char*)NULL)) { | |
464 | set_val_or_die("daemonize", "false"); | |
465 | } | |
466 | else if (ceph_argparse_flag(args, i, "-d", (char*)NULL)) { | |
467 | set_val_or_die("daemonize", "false"); | |
468 | set_val_or_die("log_file", ""); | |
469 | set_val_or_die("log_to_stderr", "true"); | |
470 | set_val_or_die("err_to_stderr", "true"); | |
471 | set_val_or_die("log_to_syslog", "false"); | |
472 | } | |
473 | // Some stuff that we wanted to give universal single-character options for | |
474 | // Careful: you can burn through the alphabet pretty quickly by adding | |
475 | // to this list. | |
476 | else if (ceph_argparse_witharg(args, i, &val, "--monmap", "-M", (char*)NULL)) { | |
477 | set_val_or_die("monmap", val.c_str()); | |
478 | } | |
479 | else if (ceph_argparse_witharg(args, i, &val, "--mon_host", "-m", (char*)NULL)) { | |
480 | set_val_or_die("mon_host", val.c_str()); | |
481 | } | |
482 | else if (ceph_argparse_witharg(args, i, &val, "--bind", (char*)NULL)) { | |
483 | set_val_or_die("public_addr", val.c_str()); | |
484 | } | |
485 | else if (ceph_argparse_witharg(args, i, &val, "--keyfile", "-K", (char*)NULL)) { | |
486 | set_val_or_die("keyfile", val.c_str()); | |
487 | } | |
488 | else if (ceph_argparse_witharg(args, i, &val, "--keyring", "-k", (char*)NULL)) { | |
489 | set_val_or_die("keyring", val.c_str()); | |
490 | } | |
491 | else if (ceph_argparse_witharg(args, i, &val, "--client_mountpoint", "-r", (char*)NULL)) { | |
492 | set_val_or_die("client_mountpoint", val.c_str()); | |
493 | } | |
494 | else { | |
495 | parse_option(args, i, NULL); | |
496 | } | |
497 | } | |
498 | ||
499 | if (show_config) { | |
500 | expand_all_meta(); | |
501 | _show_config(&cout, NULL); | |
502 | _exit(0); | |
503 | } | |
504 | ||
505 | if (show_config_value) { | |
506 | char *buf = 0; | |
507 | int r = _get_val(show_config_value_arg.c_str(), &buf, -1); | |
508 | if (r < 0) { | |
509 | if (r == -ENOENT) | |
510 | std::cerr << "failed to get config option '" << | |
511 | show_config_value_arg << "': option not found" << std::endl; | |
512 | else | |
513 | std::cerr << "failed to get config option '" << | |
514 | show_config_value_arg << "': " << cpp_strerror(r) << std::endl; | |
515 | _exit(1); | |
516 | } | |
517 | string s = buf; | |
518 | expand_meta(s, &std::cerr); | |
519 | std::cout << s << std::endl; | |
520 | _exit(0); | |
521 | } | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | int md_config_t::parse_option(std::vector<const char*>& args, | |
527 | std::vector<const char*>::iterator& i, | |
528 | ostream *oss) | |
529 | { | |
530 | int ret = 0; | |
531 | int o; | |
532 | std::string val; | |
533 | ||
534 | // subsystems? | |
535 | for (o = 0; o < subsys.get_num(); o++) { | |
536 | std::string as_option("--"); | |
537 | as_option += "debug_"; | |
538 | as_option += subsys.get_name(o); | |
539 | if (ceph_argparse_witharg(args, i, &val, | |
540 | as_option.c_str(), (char*)NULL)) { | |
541 | int log, gather; | |
542 | int r = sscanf(val.c_str(), "%d/%d", &log, &gather); | |
543 | if (r >= 1) { | |
544 | if (r < 2) | |
545 | gather = log; | |
546 | // cout << "subsys " << subsys.get_name(o) << " log " << log << " gather " << gather << std::endl; | |
547 | subsys.set_log_level(o, log); | |
548 | subsys.set_gather_level(o, gather); | |
549 | if (oss) | |
550 | *oss << "debug_" << subsys.get_name(o) << "=" << log << "/" << gather << " "; | |
551 | } | |
552 | break; | |
553 | } | |
554 | } | |
555 | if (o < subsys.get_num()) { | |
556 | return ret; | |
557 | } | |
558 | ||
559 | const char *option_name = nullptr; | |
560 | std::string error_message; | |
561 | o = 0; | |
562 | for (auto& opt_ref: *config_options) { | |
563 | ostringstream err; | |
564 | config_option const *opt = &opt_ref; | |
565 | std::string as_option("--"); | |
566 | as_option += opt->name; | |
567 | option_name = opt->name; | |
568 | if (opt->type == OPT_BOOL) { | |
569 | int res; | |
570 | if (ceph_argparse_binary_flag(args, i, &res, oss, as_option.c_str(), | |
571 | (char*)NULL)) { | |
572 | if (res == 0) | |
573 | ret = set_val_impl("false", opt, &error_message); | |
574 | else if (res == 1) | |
575 | ret = set_val_impl("true", opt, &error_message); | |
576 | else | |
577 | ret = res; | |
578 | break; | |
579 | } else { | |
580 | std::string no("--no-"); | |
581 | no += opt->name; | |
582 | if (ceph_argparse_flag(args, i, no.c_str(), (char*)NULL)) { | |
583 | ret = set_val_impl("false", opt, &error_message); | |
584 | break; | |
585 | } | |
586 | } | |
587 | } else if (ceph_argparse_witharg(args, i, &val, err, | |
588 | as_option.c_str(), (char*)NULL)) { | |
589 | if (!err.str().empty()) { | |
590 | error_message = err.str(); | |
591 | ret = -EINVAL; | |
592 | break; | |
593 | } | |
594 | if (oss && ((!opt->is_safe()) && | |
595 | (observers.find(opt->name) == observers.end()))) { | |
596 | *oss << "You cannot change " << opt->name << " using injectargs.\n"; | |
597 | return -ENOSYS; | |
598 | } | |
599 | ret = set_val_impl(val, opt, &error_message); | |
600 | break; | |
601 | } | |
602 | ++o; | |
603 | } | |
604 | ||
605 | if (ret != 0 || !error_message.empty()) { | |
224ce89b | 606 | assert(option_name); |
7c673cae FG |
607 | if (oss) { |
608 | *oss << "Parse error setting " << option_name << " to '" | |
609 | << val << "' using injectargs"; | |
610 | if (!error_message.empty()) { | |
611 | *oss << " (" << error_message << ")"; | |
612 | } | |
613 | *oss << ".\n"; | |
614 | } else { | |
615 | cerr << "parse error setting '" << option_name << "' to '" | |
616 | << val << "'"; | |
617 | if (!error_message.empty()) { | |
618 | cerr << " (" << error_message << ")"; | |
619 | } | |
620 | cerr << "\n" << std::endl; | |
621 | } | |
622 | } | |
623 | ||
624 | if (o == (int)config_options->size()) { | |
625 | // ignore | |
626 | ++i; | |
627 | } | |
628 | return ret; | |
629 | } | |
630 | ||
631 | int md_config_t::parse_injectargs(std::vector<const char*>& args, | |
632 | std::ostream *oss) | |
633 | { | |
634 | assert(lock.is_locked()); | |
635 | int ret = 0; | |
636 | for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ) { | |
637 | int r = parse_option(args, i, oss); | |
638 | if (r < 0) | |
639 | ret = r; | |
640 | } | |
641 | return ret; | |
642 | } | |
643 | ||
644 | void md_config_t::apply_changes(std::ostream *oss) | |
645 | { | |
646 | Mutex::Locker l(lock); | |
647 | /* | |
648 | * apply changes until the cluster name is assigned | |
649 | */ | |
650 | if (cluster.size()) | |
651 | _apply_changes(oss); | |
652 | } | |
653 | ||
654 | bool md_config_t::_internal_field(const string& s) | |
655 | { | |
656 | if (s == "internal_safe_to_start_threads") | |
657 | return true; | |
658 | return false; | |
659 | } | |
660 | ||
661 | void md_config_t::_apply_changes(std::ostream *oss) | |
662 | { | |
663 | /* Maps observers to the configuration options that they care about which | |
664 | * have changed. */ | |
665 | typedef std::map < md_config_obs_t*, std::set <std::string> > rev_obs_map_t; | |
666 | ||
667 | expand_all_meta(); | |
668 | ||
669 | // create the reverse observer mapping, mapping observers to the set of | |
670 | // changed keys that they'll get. | |
671 | rev_obs_map_t robs; | |
672 | std::set <std::string> empty_set; | |
673 | char buf[128]; | |
674 | char *bufptr = (char*)buf; | |
675 | for (changed_set_t::const_iterator c = changed.begin(); | |
676 | c != changed.end(); ++c) { | |
677 | const std::string &key(*c); | |
678 | pair < obs_map_t::iterator, obs_map_t::iterator > | |
679 | range(observers.equal_range(key)); | |
680 | if ((oss) && | |
681 | (!_get_val(key.c_str(), &bufptr, sizeof(buf))) && | |
682 | !_internal_field(key)) { | |
683 | (*oss) << key << " = '" << buf << "' "; | |
684 | if (range.first == range.second) { | |
685 | (*oss) << "(not observed, change may require restart) "; | |
686 | } | |
687 | } | |
688 | for (obs_map_t::iterator r = range.first; r != range.second; ++r) { | |
689 | rev_obs_map_t::value_type robs_val(r->second, empty_set); | |
690 | pair < rev_obs_map_t::iterator, bool > robs_ret(robs.insert(robs_val)); | |
691 | std::set <std::string> &keys(robs_ret.first->second); | |
692 | keys.insert(key); | |
693 | } | |
694 | } | |
695 | ||
696 | changed.clear(); | |
697 | ||
698 | // Make any pending observer callbacks | |
699 | for (rev_obs_map_t::const_iterator r = robs.begin(); r != robs.end(); ++r) { | |
700 | md_config_obs_t *obs = r->first; | |
701 | obs->handle_conf_change(this, r->second); | |
702 | } | |
703 | ||
704 | } | |
705 | ||
706 | void md_config_t::call_all_observers() | |
707 | { | |
708 | std::map<md_config_obs_t*,std::set<std::string> > obs; | |
709 | { | |
710 | Mutex::Locker l(lock); | |
711 | ||
712 | expand_all_meta(); | |
713 | ||
224ce89b | 714 | for (auto r = observers.begin(); r != observers.end(); ++r) { |
7c673cae FG |
715 | obs[r->second].insert(r->first); |
716 | } | |
717 | } | |
224ce89b | 718 | for (auto p = obs.begin(); |
7c673cae FG |
719 | p != obs.end(); |
720 | ++p) { | |
721 | p->first->handle_conf_change(this, p->second); | |
722 | } | |
723 | } | |
724 | ||
725 | int md_config_t::injectargs(const std::string& s, std::ostream *oss) | |
726 | { | |
727 | int ret; | |
728 | Mutex::Locker l(lock); | |
729 | char b[s.length()+1]; | |
730 | strcpy(b, s.c_str()); | |
731 | std::vector<const char*> nargs; | |
732 | char *p = b; | |
733 | while (*p) { | |
734 | nargs.push_back(p); | |
735 | while (*p && *p != ' ') p++; | |
736 | if (!*p) | |
737 | break; | |
738 | *p++ = 0; | |
739 | while (*p && *p == ' ') p++; | |
740 | } | |
741 | ret = parse_injectargs(nargs, oss); | |
742 | if (!nargs.empty()) { | |
743 | *oss << " failed to parse arguments: "; | |
744 | std::string prefix; | |
745 | for (std::vector<const char*>::const_iterator i = nargs.begin(); | |
746 | i != nargs.end(); ++i) { | |
747 | *oss << prefix << *i; | |
748 | prefix = ","; | |
749 | } | |
750 | *oss << "\n"; | |
751 | ret = -EINVAL; | |
752 | } | |
753 | _apply_changes(oss); | |
754 | return ret; | |
755 | } | |
756 | ||
757 | void md_config_t::set_val_or_die(const char *key, const char *val) | |
758 | { | |
759 | int ret = set_val(key, val); | |
760 | assert(ret == 0); | |
761 | } | |
762 | ||
763 | struct is_integer_member : public boost::static_visitor<bool> { | |
764 | template<typename T, | |
765 | typename boost::enable_if<boost::is_integral<T>, int>::type = 0> | |
766 | bool operator()(const T md_config_t::* /* member_ptr */) const { | |
767 | return true; | |
768 | } | |
769 | template<typename T, | |
770 | typename boost::enable_if_c<!boost::is_integral<T>::value, int>::type = 0> | |
771 | bool operator()(const T md_config_t::* /* member_ptr */) const { | |
772 | return false; | |
773 | } | |
774 | }; | |
775 | ||
776 | struct is_float_member : public boost::static_visitor<bool> { | |
777 | template<typename T, | |
778 | typename boost::enable_if<boost::is_float<T>, int>::type = 0> | |
779 | bool operator()(const T md_config_t::* /* member_ptr */) const { | |
780 | return true; | |
781 | } | |
782 | template<typename T, | |
783 | typename boost::enable_if_c<!boost::is_float<T>::value, int>::type = 0> | |
784 | bool operator()(const T md_config_t::* /* member_ptr */) const { | |
785 | return false; | |
786 | } | |
787 | }; | |
788 | ||
789 | bool md_config_t::config_option::is_safe() const { | |
790 | // for now integer and floating point options considered thread safe | |
791 | return safe || | |
792 | boost::apply_visitor(is_integer_member(), md_member_ptr) || | |
793 | boost::apply_visitor(is_float_member(), md_member_ptr); | |
794 | } | |
795 | ||
796 | md_config_t::config_option const *md_config_t::find_config_option(const std::string &normalized_key) const | |
797 | { | |
798 | auto opt_it = std::find_if(config_options->begin(), | |
799 | config_options->end(), | |
800 | [normalized_key](const config_option &opt) -> bool { | |
801 | return strcmp(normalized_key.c_str(), opt.name) == 0; | |
802 | }); | |
803 | return config_options->end() == opt_it ? nullptr : &(*opt_it); | |
804 | } | |
805 | ||
806 | int md_config_t::set_val(const char *key, const char *val, bool meta) | |
807 | { | |
808 | Mutex::Locker l(lock); | |
809 | if (!key) | |
810 | return -EINVAL; | |
811 | if (!val) | |
812 | return -EINVAL; | |
813 | ||
814 | std::string v(val); | |
815 | if (meta) | |
816 | expand_meta(v, &std::cerr); | |
817 | ||
818 | string k(ConfFile::normalize_key_name(key)); | |
819 | ||
820 | // subsystems? | |
821 | if (strncmp(k.c_str(), "debug_", 6) == 0) { | |
822 | for (int o = 0; o < subsys.get_num(); o++) { | |
823 | std::string as_option = "debug_" + subsys.get_name(o); | |
824 | if (k == as_option) { | |
825 | int log, gather; | |
826 | int r = sscanf(v.c_str(), "%d/%d", &log, &gather); | |
827 | if (r >= 1) { | |
828 | if (r < 2) | |
829 | gather = log; | |
830 | // cout << "subsys " << subsys.get_name(o) << " log " << log << " gather " << gather << std::endl; | |
831 | subsys.set_log_level(o, log); | |
832 | subsys.set_gather_level(o, gather); | |
833 | return 0; | |
834 | } | |
835 | return -EINVAL; | |
836 | } | |
837 | } | |
838 | } | |
839 | ||
840 | config_option const *opt = find_config_option(k); | |
841 | if (opt) { | |
842 | if ((!opt->is_safe()) && internal_safe_to_start_threads) { | |
843 | // If threads have been started and the option is not thread safe | |
844 | if (observers.find(opt->name) == observers.end()) { | |
845 | // And there is no observer to safely change it... | |
846 | // You lose. | |
847 | return -ENOSYS; | |
848 | } | |
849 | } | |
850 | ||
851 | std::string error_message; | |
852 | int r = set_val_impl(v, opt, &error_message); | |
853 | return r; | |
854 | } | |
855 | ||
856 | // couldn't find a configuration option with key 'key' | |
857 | return -ENOENT; | |
858 | } | |
859 | ||
860 | ||
861 | int md_config_t::get_val(const char *key, char **buf, int len) const | |
862 | { | |
863 | Mutex::Locker l(lock); | |
864 | return _get_val(key, buf,len); | |
865 | } | |
866 | ||
867 | md_config_t::config_value_t md_config_t::get_val_generic(const char *key) const | |
868 | { | |
869 | Mutex::Locker l(lock); | |
870 | return _get_val(key); | |
871 | } | |
872 | ||
873 | class get_value_generic_visitor : public boost::static_visitor<md_config_t::config_value_t> { | |
874 | md_config_t const *conf; | |
875 | public: | |
876 | explicit get_value_generic_visitor(md_config_t const *conf_) : conf(conf_) { } | |
877 | template<typename T> md_config_t::config_value_t operator()(const T md_config_t::* member_ptr) { | |
878 | return md_config_t::config_value_t(conf->*member_ptr); | |
879 | } | |
880 | }; | |
881 | ||
882 | md_config_t::config_value_t md_config_t::_get_val(const char *key) const | |
883 | { | |
884 | assert(lock.is_locked()); | |
885 | ||
886 | if (!key) | |
887 | return config_value_t(invalid_config_value_t()); | |
888 | ||
889 | // In key names, leading and trailing whitespace are not significant. | |
890 | string k(ConfFile::normalize_key_name(key)); | |
891 | ||
892 | config_option const *opt = find_config_option(k); | |
893 | if (!opt) { | |
894 | return config_value_t(invalid_config_value_t()); | |
895 | } | |
896 | get_value_generic_visitor gvv(this); | |
897 | return boost::apply_visitor(gvv, opt->md_member_ptr); | |
898 | } | |
899 | ||
900 | int md_config_t::_get_val(const char *key, std::string *value) const { | |
901 | assert(lock.is_locked()); | |
902 | ||
903 | std::string normalized_key(ConfFile::normalize_key_name(key)); | |
904 | config_value_t config_value = _get_val(normalized_key.c_str()); | |
905 | if (!boost::get<invalid_config_value_t>(&config_value)) { | |
906 | ostringstream oss; | |
907 | if (bool *flag = boost::get<bool>(&config_value)) { | |
908 | oss << (*flag ? "true" : "false"); | |
224ce89b WB |
909 | } else if (float *fp = boost::get<float>(&config_value)) { |
910 | oss << std::fixed << *fp ; | |
911 | } else if (double *dp = boost::get<double>(&config_value)) { | |
912 | oss << std::fixed << *dp ; | |
7c673cae FG |
913 | } else { |
914 | oss << config_value; | |
915 | } | |
916 | *value = oss.str(); | |
917 | return 0; | |
918 | } | |
919 | return -ENOENT; | |
920 | } | |
921 | ||
922 | int md_config_t::_get_val(const char *key, char **buf, int len) const | |
923 | { | |
924 | assert(lock.is_locked()); | |
925 | ||
926 | if (!key) | |
927 | return -EINVAL; | |
928 | ||
224ce89b WB |
929 | string val ; |
930 | if (!_get_val(key, &val)) { | |
931 | int l = val.length() + 1; | |
7c673cae FG |
932 | if (len == -1) { |
933 | *buf = (char*)malloc(l); | |
934 | if (!*buf) | |
935 | return -ENOMEM; | |
224ce89b | 936 | strncpy(*buf, val.c_str(), l); |
7c673cae FG |
937 | return 0; |
938 | } | |
224ce89b | 939 | snprintf(*buf, len, "%s", val.c_str()); |
7c673cae FG |
940 | return (l > len) ? -ENAMETOOLONG : 0; |
941 | } | |
942 | ||
224ce89b | 943 | string k(ConfFile::normalize_key_name(key)); |
7c673cae FG |
944 | // subsys? |
945 | for (int o = 0; o < subsys.get_num(); o++) { | |
946 | std::string as_option = "debug_" + subsys.get_name(o); | |
947 | if (k == as_option) { | |
948 | if (len == -1) { | |
949 | *buf = (char*)malloc(20); | |
950 | len = 20; | |
951 | } | |
952 | int l = snprintf(*buf, len, "%d/%d", subsys.get_log_level(o), subsys.get_gather_level(o)); | |
953 | return (l == len) ? -ENAMETOOLONG : 0; | |
954 | } | |
955 | } | |
956 | ||
957 | // couldn't find a configuration option with key 'k' | |
958 | return -ENOENT; | |
959 | } | |
960 | ||
961 | void md_config_t::get_all_keys(std::vector<std::string> *keys) const { | |
962 | const std::string negative_flag_prefix("no_"); | |
963 | ||
964 | keys->clear(); | |
965 | keys->reserve(config_options->size()); | |
966 | for (auto& opt: *config_options) { | |
967 | keys->push_back(opt.name); | |
968 | if (opt.type == OPT_BOOL) { | |
969 | keys->push_back(negative_flag_prefix + opt.name); | |
970 | } | |
971 | } | |
972 | for (int i = 0; i < subsys.get_num(); ++i) { | |
973 | keys->push_back("debug_" + subsys.get_name(i)); | |
974 | } | |
975 | } | |
976 | ||
977 | /* The order of the sections here is important. The first section in the | |
978 | * vector is the "highest priority" section; if we find it there, we'll stop | |
979 | * looking. The lowest priority section is the one we look in only if all | |
980 | * others had nothing. This should always be the global section. | |
981 | */ | |
982 | void md_config_t::get_my_sections(std::vector <std::string> §ions) const | |
983 | { | |
984 | Mutex::Locker l(lock); | |
985 | _get_my_sections(sections); | |
986 | } | |
987 | ||
988 | void md_config_t::_get_my_sections(std::vector <std::string> §ions) const | |
989 | { | |
990 | assert(lock.is_locked()); | |
991 | sections.push_back(name.to_str()); | |
992 | ||
993 | sections.push_back(name.get_type_name()); | |
994 | ||
995 | sections.push_back("global"); | |
996 | } | |
997 | ||
998 | // Return a list of all sections | |
999 | int md_config_t::get_all_sections(std::vector <std::string> §ions) const | |
1000 | { | |
1001 | Mutex::Locker l(lock); | |
1002 | for (ConfFile::const_section_iter_t s = cf.sections_begin(); | |
1003 | s != cf.sections_end(); ++s) { | |
1004 | sections.push_back(s->first); | |
1005 | } | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | int md_config_t::get_val_from_conf_file(const std::vector <std::string> §ions, | |
1010 | const char *key, std::string &out, bool emeta) const | |
1011 | { | |
1012 | Mutex::Locker l(lock); | |
1013 | return _get_val_from_conf_file(sections, key, out, emeta); | |
1014 | } | |
1015 | ||
1016 | int md_config_t::_get_val_from_conf_file(const std::vector <std::string> §ions, | |
1017 | const char *key, std::string &out, bool emeta) const | |
1018 | { | |
1019 | assert(lock.is_locked()); | |
1020 | std::vector <std::string>::const_iterator s = sections.begin(); | |
1021 | std::vector <std::string>::const_iterator s_end = sections.end(); | |
1022 | for (; s != s_end; ++s) { | |
1023 | int ret = cf.read(s->c_str(), key, out); | |
1024 | if (ret == 0) { | |
1025 | if (emeta) | |
1026 | expand_meta(out, &std::cerr); | |
1027 | return 0; | |
1028 | } | |
1029 | else if (ret != -ENOENT) | |
1030 | return ret; | |
1031 | } | |
1032 | return -ENOENT; | |
1033 | } | |
1034 | ||
1035 | int md_config_t::set_val_impl(const std::string &val, config_option const *opt, | |
1036 | std::string *error_message) | |
1037 | { | |
1038 | assert(lock.is_locked()); | |
1039 | std::string value(val); | |
1040 | if (opt->validator) { | |
1041 | int r = opt->validator(&value, error_message); | |
1042 | if (r < 0) { | |
1043 | return r; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | int ret = set_val_raw(value.c_str(), opt); | |
1048 | if (ret) | |
1049 | return ret; | |
1050 | changed.insert(opt->name); | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | template<typename T> struct strtox_helper; | |
1055 | ||
1056 | template<> struct strtox_helper<float> { | |
1057 | static inline void apply(const char *val, float &x, std::string &err) { | |
1058 | x = strict_strtof(val, &err); | |
1059 | } | |
1060 | }; | |
1061 | ||
1062 | template<> struct strtox_helper<double> { | |
1063 | static inline void apply(const char *val, double &x, std::string &err) { | |
1064 | x = strict_strtod(val, &err); | |
1065 | } | |
1066 | }; | |
1067 | ||
1068 | template<typename T> static inline int strict_strtox(const char *val, T &x) { | |
1069 | std::string err; | |
1070 | strtox_helper<T>::apply(val, x, err); | |
1071 | return err.empty() ? 0 : -EINVAL; | |
1072 | } | |
1073 | ||
1074 | class set_value_visitor : public boost::static_visitor<int> { | |
1075 | md_config_t const *conf; | |
1076 | const char *val; | |
1077 | public: | |
1078 | explicit set_value_visitor(md_config_t const *conf_, const char *val_) : | |
1079 | conf(conf_), val(val_) { } | |
1080 | ||
1081 | int operator()(const std::string md_config_t::* member_ptr) { | |
1082 | auto *ptr = const_cast<std::string *>(&(conf->*member_ptr)); | |
1083 | *ptr = val ? val : ""; | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | int operator()(const bool md_config_t::* member_ptr) { | |
1088 | bool *ptr = const_cast<bool *>(&(conf->*member_ptr)); | |
1089 | if (strcasecmp(val, "false") == 0) { | |
1090 | *ptr = false; | |
1091 | } else if (strcasecmp(val, "true") == 0) { | |
1092 | *ptr = true; | |
1093 | } else { | |
1094 | std::string err; | |
1095 | int b = strict_strtol(val, 10, &err); | |
1096 | if (!err.empty()) { | |
1097 | return -EINVAL; | |
1098 | } | |
1099 | *ptr = !!b; | |
1100 | } | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | // type has parse() member function | |
1105 | template<typename T, | |
1106 | typename boost::enable_if<boost::is_member_function_pointer<decltype(&T::parse)>, int>::type = 0> | |
1107 | int operator()(const T md_config_t::* member_ptr) { | |
1108 | T *obj = const_cast<T *>(&(conf->*member_ptr)); | |
1109 | if (!obj->parse(val)) { | |
1110 | return -EINVAL; | |
1111 | } | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | // float, double | |
1116 | template<typename T, | |
1117 | typename boost::enable_if<boost::is_floating_point<T>, int>::type = 0> | |
1118 | int operator()(const T md_config_t::* member_ptr) { | |
1119 | T* ptr = const_cast<T *>(&(conf->*member_ptr)); | |
1120 | return strict_strtox(val, *ptr); | |
1121 | } | |
1122 | ||
1123 | // integers | |
1124 | template<typename T, | |
1125 | typename boost::enable_if_c<boost::is_integral<T>::value && | |
1126 | !boost::is_same<T, bool>::value, int>::type = 0> | |
1127 | int operator()(const T md_config_t::* member_ptr) { | |
1128 | std::string err; | |
1129 | T f = strict_si_cast<T>(val, &err); | |
1130 | if (!err.empty()) { | |
1131 | return -EINVAL; | |
1132 | } | |
1133 | T *ptr = const_cast<T *>(&(conf->*member_ptr)); | |
1134 | *ptr = f; | |
1135 | return 0; | |
1136 | } | |
1137 | }; | |
1138 | ||
1139 | int md_config_t::set_val_raw(const char *val, config_option const *opt) | |
1140 | { | |
1141 | assert(lock.is_locked()); | |
1142 | set_value_visitor svv(this, val); | |
1143 | return boost::apply_visitor(svv, opt->md_member_ptr); | |
1144 | } | |
1145 | ||
1146 | static const char *CONF_METAVARIABLES[] = { | |
1147 | "data_dir", // put this first: it may contain some of the others | |
1148 | "cluster", "type", "name", "host", "num", "id", "pid", "cctid" | |
1149 | }; | |
1150 | static const int NUM_CONF_METAVARIABLES = | |
1151 | (sizeof(CONF_METAVARIABLES) / sizeof(CONF_METAVARIABLES[0])); | |
1152 | ||
1153 | void md_config_t::expand_all_meta() | |
1154 | { | |
1155 | // Expand all metavariables | |
1156 | ostringstream oss; | |
1157 | for (auto& opt: *config_options) { | |
1158 | std::string *str; | |
1159 | opt.conf_ptr(str, this); | |
1160 | if (str) { | |
1161 | list<config_option const *> stack; | |
1162 | expand_meta(*str, &opt, stack, &oss); | |
1163 | } | |
1164 | } | |
1165 | cerr << oss.str(); | |
1166 | } | |
1167 | ||
1168 | bool md_config_t::expand_meta(std::string &origval, | |
1169 | std::ostream *oss) const | |
1170 | { | |
1171 | list<config_option const *> stack; | |
1172 | return expand_meta(origval, NULL, stack, oss); | |
1173 | } | |
1174 | ||
1175 | bool md_config_t::expand_meta(std::string &origval, | |
1176 | config_option const *opt, | |
1177 | std::list<config_option const *> stack, | |
1178 | std::ostream *oss) const | |
1179 | { | |
1180 | assert(lock.is_locked()); | |
1181 | ||
1182 | // no $ means no variable expansion is necessary | |
1183 | if (origval.find("$") == string::npos) | |
1184 | return false; | |
1185 | ||
1186 | // ignore an expansion loop and create a human readable | |
1187 | // message about it | |
1188 | if (opt) { | |
1189 | for (list<config_option const *>::iterator i = stack.begin(); | |
1190 | i != stack.end(); | |
1191 | ++i) { | |
1192 | if (strcmp(opt->name, (*i)->name) == 0) { | |
1193 | *oss << "variable expansion loop at " | |
1194 | << opt->name << "=" << origval << std::endl; | |
1195 | *oss << "expansion stack: " << std::endl; | |
1196 | for (list<config_option const *>::iterator j = stack.begin(); | |
1197 | j != stack.end(); | |
1198 | ++j) { | |
1199 | *oss << (*j)->name << "=" << *((*j)->conf_ptr<std::string>(this)) << std::endl; | |
1200 | } | |
1201 | return false; | |
1202 | } | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | if (opt) | |
1207 | stack.push_front(opt); | |
1208 | ||
1209 | bool found_meta = false; | |
1210 | string out; | |
1211 | string val = origval; | |
1212 | for (string::size_type s = 0; s < val.size(); ) { | |
1213 | if (val[s] != '$') { | |
1214 | out += val[s++]; | |
1215 | continue; | |
1216 | } | |
1217 | ||
1218 | // try to parse the variable name into var, either \$\{(.+)\} or | |
1219 | // \$[a-z\_]+ | |
1220 | const char *valid_chars = "abcdefghijklmnopqrstuvwxyz_"; | |
1221 | string var; | |
1222 | size_t endpos = 0; | |
1223 | if (val[s+1] == '{') { | |
1224 | // ...${foo_bar}... | |
1225 | endpos = val.find_first_not_of(valid_chars, s+2); | |
1226 | if (endpos != std::string::npos && | |
1227 | val[endpos] == '}') { | |
1228 | var = val.substr(s+2, endpos-s-2); | |
1229 | endpos++; | |
1230 | } | |
1231 | } else { | |
1232 | // ...$foo... | |
1233 | endpos = val.find_first_not_of(valid_chars, s+1); | |
1234 | if (endpos != std::string::npos) | |
1235 | var = val.substr(s+1, endpos-s-1); | |
1236 | else | |
1237 | var = val.substr(s+1); | |
1238 | } | |
1239 | ||
1240 | bool expanded = false; | |
1241 | if (var.length()) { | |
1242 | // special metavariable? | |
1243 | for (int i = 0; i < NUM_CONF_METAVARIABLES; ++i) { | |
1244 | if (var != CONF_METAVARIABLES[i]) | |
1245 | continue; | |
1246 | //cout << " meta match of " << var << " " << CONF_METAVARIABLES[i] << std::endl; | |
1247 | if (var == "type") | |
1248 | out += name.get_type_name(); | |
1249 | else if (var == "cluster") | |
1250 | out += cluster; | |
1251 | else if (var == "name") | |
1252 | out += name.to_cstr(); | |
1253 | else if (var == "host") | |
1254 | { | |
1255 | if (host == "") | |
1256 | out += ceph_get_short_hostname(); | |
1257 | else | |
1258 | out += host; | |
1259 | } | |
1260 | else if (var == "num") | |
1261 | out += name.get_id().c_str(); | |
1262 | else if (var == "id") | |
1263 | out += name.get_id().c_str(); | |
1264 | else if (var == "pid") | |
1265 | out += stringify(getpid()); | |
1266 | else if (var == "cctid") | |
1267 | out += stringify((unsigned long long)this); | |
1268 | else if (var == "data_dir") { | |
1269 | if (data_dir_option.length()) { | |
1270 | char *vv = NULL; | |
1271 | _get_val(data_dir_option.c_str(), &vv, -1); | |
1272 | string tmp = vv; | |
1273 | free(vv); | |
1274 | expand_meta(tmp, NULL, stack, oss); | |
1275 | out += tmp; | |
1276 | } else { | |
1277 | // this isn't really right, but it'll result in a mangled | |
1278 | // non-existent path that will fail any search list | |
1279 | out += "$data_dir"; | |
1280 | } | |
1281 | } else | |
1282 | ceph_abort(); // unreachable | |
1283 | expanded = true; | |
1284 | } | |
1285 | ||
1286 | if (!expanded) { | |
1287 | // config option? | |
1288 | for (auto& opt: *config_options) { | |
1289 | if (var == opt.name) { | |
1290 | string *origval; | |
1291 | opt.conf_ptr(origval, const_cast<md_config_t *>(this)); | |
1292 | if (origval) { | |
1293 | expand_meta(*origval, &opt, stack, oss); | |
1294 | out += *origval; | |
1295 | } else { | |
1296 | char *vv = NULL; | |
1297 | _get_val(opt.name, &vv, -1); | |
1298 | out += vv; | |
1299 | free(vv); | |
1300 | } | |
1301 | expanded = true; | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | if (expanded) { | |
1309 | found_meta = true; | |
1310 | s = endpos; | |
1311 | } else { | |
1312 | out += val[s++]; | |
1313 | } | |
1314 | } | |
1315 | // override the original value with the expanded value | |
1316 | origval = out; | |
1317 | return found_meta; | |
1318 | } | |
1319 | ||
1320 | void md_config_t::diff( | |
31f18b77 FG |
1321 | const md_config_t *other, |
1322 | map<string, pair<string, string> > *diff, | |
1323 | set<string> *unknown) | |
1324 | { | |
1325 | diff_helper(other, diff, unknown); | |
1326 | } | |
1327 | void md_config_t::diff( | |
1328 | const md_config_t *other, | |
1329 | map<string, pair<string, string> > *diff, | |
1330 | set<string> *unknown, const string& setting) | |
1331 | { | |
1332 | diff_helper(other, diff, unknown, setting); | |
1333 | } | |
1334 | ||
1335 | void md_config_t::diff_helper( | |
7c673cae FG |
1336 | const md_config_t *other, |
1337 | map<string,pair<string,string> > *diff, | |
31f18b77 | 1338 | set<string> *unknown, const string& setting) |
7c673cae FG |
1339 | { |
1340 | Mutex::Locker l(lock); | |
1341 | ||
1342 | char local_buf[4096]; | |
1343 | char other_buf[4096]; | |
31f18b77 FG |
1344 | for (auto& opt : *config_options) { |
1345 | if (!setting.empty()) { | |
1346 | if (setting != opt.name) { | |
1347 | continue; | |
1348 | } | |
1349 | } | |
7c673cae FG |
1350 | memset(local_buf, 0, sizeof(local_buf)); |
1351 | memset(other_buf, 0, sizeof(other_buf)); | |
1352 | ||
1353 | char *other_val = other_buf; | |
1354 | int err = other->get_val(opt.name, &other_val, sizeof(other_buf)); | |
1355 | if (err < 0) { | |
1356 | if (err == -ENOENT) { | |
1357 | unknown->insert(opt.name); | |
1358 | } | |
1359 | continue; | |
1360 | } | |
1361 | ||
1362 | char *local_val = local_buf; | |
1363 | err = _get_val(opt.name, &local_val, sizeof(local_buf)); | |
1364 | if (err != 0) | |
1365 | continue; | |
1366 | ||
1367 | if (strcmp(local_val, other_val)) | |
1368 | diff->insert(make_pair(opt.name, make_pair(local_val, other_val))); | |
31f18b77 FG |
1369 | else if (!setting.empty()) { |
1370 | diff->insert(make_pair(opt.name, make_pair(local_val, other_val))); | |
1371 | break; | |
1372 | } | |
7c673cae FG |
1373 | } |
1374 | } | |
1375 | ||
1376 | void md_config_t::complain_about_parse_errors(CephContext *cct) | |
1377 | { | |
1378 | ::complain_about_parse_errors(cct, &parse_errors); | |
1379 | } | |
1380 | ||
1381 | void md_config_t::validate_default_settings() { | |
1382 | Mutex::Locker l(lock); | |
1383 | for (auto &opt : *config_options) { | |
1384 | // normalize config defaults using their validator | |
1385 | if (opt.validator) { | |
1386 | std::string value; | |
1387 | int r = _get_val(opt.name, &value); | |
1388 | assert(r == 0); | |
1389 | ||
1390 | std::string error_message; | |
1391 | r = set_val_impl(value.c_str(), &opt, &error_message); | |
1392 | assert(r == 0); | |
1393 | } | |
1394 | } | |
1395 | } |