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