Commit | Line | Data |
---|---|---|
1501a7f3 JG |
1 | /* |
2 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
1501a7f3 | 20 | #include <assert.h> |
1501a7f3 | 21 | #include <ctype.h> |
1501a7f3 JG |
22 | #include <stdio.h> |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
36f2332b | 25 | #include <inttypes.h> |
dcf266c0 JG |
26 | #include <dirent.h> |
27 | #include <unistd.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/stat.h> | |
1501a7f3 JG |
30 | |
31 | #include <common/defaults.h> | |
32 | #include <common/error.h> | |
33 | #include <common/macros.h> | |
34 | #include <common/utils.h> | |
e8fa9fb0 | 35 | #include <common/compat/getenv.h> |
fb198a11 JG |
36 | #include <lttng/lttng-error.h> |
37 | #include <libxml/parser.h> | |
38 | #include <libxml/valid.h> | |
39 | #include <libxml/xmlschemas.h> | |
dcf266c0 JG |
40 | #include <libxml/tree.h> |
41 | #include <lttng/lttng.h> | |
42 | #include <lttng/snapshot.h> | |
1501a7f3 JG |
43 | |
44 | #include "config.h" | |
36f2332b | 45 | #include "config-internal.h" |
1501a7f3 JG |
46 | |
47 | struct handler_filter_args { | |
48 | const char* section; | |
49 | config_entry_handler_cb handler; | |
50 | void *user_data; | |
51 | }; | |
52 | ||
dcf266c0 JG |
53 | struct session_config_validation_ctx { |
54 | xmlSchemaParserCtxtPtr parser_ctx; | |
55 | xmlSchemaPtr schema; | |
56 | xmlSchemaValidCtxtPtr schema_validation_ctx; | |
57 | }; | |
58 | ||
1501a7f3 JG |
59 | const char * const config_str_yes = "yes"; |
60 | const char * const config_str_true = "true"; | |
61 | const char * const config_str_on = "on"; | |
62 | const char * const config_str_no = "no"; | |
63 | const char * const config_str_false = "false"; | |
64 | const char * const config_str_off = "off"; | |
36f2332b | 65 | const char * const config_xml_encoding = "UTF-8"; |
fb198a11 | 66 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
36f2332b JG |
67 | const char * const config_xml_indent_string = "\t"; |
68 | const char * const config_xml_true = "true"; | |
69 | const char * const config_xml_false = "false"; | |
1501a7f3 | 70 | |
fb198a11 JG |
71 | const char * const config_element_channel = "channel"; |
72 | const char * const config_element_channels = "channels"; | |
73 | const char * const config_element_domain = "domain"; | |
74 | const char * const config_element_domains = "domains"; | |
75 | const char * const config_element_event = "event"; | |
76 | const char * const config_element_events = "events"; | |
77 | const char * const config_element_context = "context"; | |
78 | const char * const config_element_contexts = "contexts"; | |
79 | const char * const config_element_attributes = "attributes"; | |
80 | const char * const config_element_exclusion = "exclusion"; | |
81 | const char * const config_element_exclusions = "exclusions"; | |
82 | const char * const config_element_function_attributes = "function_attributes"; | |
83 | const char * const config_element_probe_attributes = "probe_attributes"; | |
84 | const char * const config_element_symbol_name = "symbol_name"; | |
85 | const char * const config_element_address = "address"; | |
86 | const char * const config_element_offset = "offset"; | |
87 | const char * const config_element_name = "name"; | |
88 | const char * const config_element_enabled = "enabled"; | |
89 | const char * const config_element_overwrite_mode = "overwrite_mode"; | |
90 | const char * const config_element_subbuf_size = "subbuffer_size"; | |
91 | const char * const config_element_num_subbuf = "subbuffer_count"; | |
92 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; | |
93 | const char * const config_element_read_timer_interval = "read_timer_interval"; | |
94 | const char * const config_element_output = "output"; | |
95 | const char * const config_element_output_type = "output_type"; | |
96 | const char * const config_element_tracefile_size = "tracefile_size"; | |
97 | const char * const config_element_tracefile_count = "tracefile_count"; | |
98 | const char * const config_element_live_timer_interval = "live_timer_interval"; | |
99 | const char * const config_element_type = "type"; | |
100 | const char * const config_element_buffer_type = "buffer_type"; | |
101 | const char * const config_element_session = "session"; | |
102 | const char * const config_element_sessions = "sessions"; | |
103 | const char * const config_element_perf = "perf"; | |
104 | const char * const config_element_config = "config"; | |
105 | const char * const config_element_started = "started"; | |
106 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
107 | const char * const config_element_loglevel = "loglevel"; | |
108 | const char * const config_element_loglevel_type = "loglevel_type"; | |
109 | const char * const config_element_filter = "filter"; | |
110 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; | |
111 | const char * const config_element_consumer_output = "consumer_output"; | |
112 | const char * const config_element_destination = "destination"; | |
113 | const char * const config_element_path = "path"; | |
114 | const char * const config_element_net_output = "net_output"; | |
115 | const char * const config_element_control_uri = "control_uri"; | |
116 | const char * const config_element_data_uri = "data_uri"; | |
117 | const char * const config_element_max_size = "max_size"; | |
118 | ||
119 | const char * const config_domain_type_kernel = "KERNEL"; | |
120 | const char * const config_domain_type_ust = "UST"; | |
121 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 122 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 123 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
124 | |
125 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
126 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
127 | const char * const config_buffer_type_global = "GLOBAL"; | |
128 | ||
129 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
130 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
131 | ||
132 | const char * const config_output_type_splice = "SPLICE"; | |
133 | const char * const config_output_type_mmap = "MMAP"; | |
134 | ||
135 | const char * const config_loglevel_type_all = "ALL"; | |
136 | const char * const config_loglevel_type_range = "RANGE"; | |
137 | const char * const config_loglevel_type_single = "SINGLE"; | |
138 | ||
139 | const char * const config_event_type_all = "ALL"; | |
140 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
141 | const char * const config_event_type_probe = "PROBE"; | |
142 | const char * const config_event_type_function = "FUNCTION"; | |
143 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
144 | const char * const config_event_type_noop = "NOOP"; | |
145 | const char * const config_event_type_syscall = "SYSCALL"; | |
146 | const char * const config_event_type_kprobe = "KPROBE"; | |
147 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
148 | ||
149 | const char * const config_event_context_pid = "PID"; | |
150 | const char * const config_event_context_procname = "PROCNAME"; | |
151 | const char * const config_event_context_prio = "PRIO"; | |
152 | const char * const config_event_context_nice = "NICE"; | |
153 | const char * const config_event_context_vpid = "VPID"; | |
154 | const char * const config_event_context_tid = "TID"; | |
155 | const char * const config_event_context_vtid = "VTID"; | |
156 | const char * const config_event_context_ppid = "PPID"; | |
157 | const char * const config_event_context_vppid = "VPPID"; | |
158 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
159 | const char * const config_event_context_hostname = "HOSTNAME"; | |
160 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 161 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
fb198a11 | 162 | |
dcf266c0 JG |
163 | struct consumer_output { |
164 | int enabled; | |
165 | char *path; | |
166 | char *control_uri; | |
167 | char *data_uri; | |
168 | }; | |
169 | ||
1501a7f3 JG |
170 | static int config_entry_handler_filter(struct handler_filter_args *args, |
171 | const char *section, const char *name, const char *value) | |
172 | { | |
173 | int ret = 0; | |
174 | struct config_entry entry = { section, name, value }; | |
175 | ||
176 | assert(args); | |
177 | ||
178 | if (!section || !name || !value) { | |
179 | ret = -EIO; | |
180 | goto end; | |
181 | } | |
182 | ||
183 | if (args->section) { | |
184 | if (strcmp(args->section, section)) { | |
185 | goto end; | |
186 | } | |
187 | } | |
188 | ||
189 | ret = args->handler(&entry, args->user_data); | |
190 | end: | |
191 | return ret; | |
192 | } | |
193 | ||
194 | LTTNG_HIDDEN | |
195 | int config_get_section_entries(const char *override_path, const char *section, | |
196 | config_entry_handler_cb handler, void *user_data) | |
197 | { | |
198 | int ret = 0; | |
7ab02a27 | 199 | char *path; |
1501a7f3 JG |
200 | FILE *config_file = NULL; |
201 | struct handler_filter_args filter = { section, handler, user_data }; | |
202 | ||
7ab02a27 DG |
203 | /* First, try system-wide conf. file. */ |
204 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
205 | ||
206 | config_file = fopen(path, "r"); | |
207 | if (config_file) { | |
208 | DBG("Loading daemon conf file at %s", path); | |
209 | /* | |
210 | * Return value is not very important here since error or not, we | |
211 | * continue and try the next possible conf. file. | |
212 | */ | |
213 | (void) ini_parse_file(config_file, | |
214 | (ini_entry_handler) config_entry_handler_filter, | |
215 | (void *) &filter); | |
216 | fclose(config_file); | |
217 | } | |
218 | ||
219 | /* Second is the user local configuration. */ | |
220 | path = utils_get_home_dir(); | |
221 | if (path) { | |
222 | char fullpath[PATH_MAX]; | |
223 | ||
224 | ret = snprintf(fullpath, sizeof(fullpath), | |
225 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
226 | if (ret < 0) { | |
227 | PERROR("snprintf user conf. path"); | |
228 | goto error; | |
229 | } | |
230 | ||
231 | config_file = fopen(fullpath, "r"); | |
232 | if (config_file) { | |
233 | DBG("Loading daemon user conf file at %s", path); | |
234 | /* | |
235 | * Return value is not very important here since error or not, we | |
236 | * continue and try the next possible conf. file. | |
237 | */ | |
238 | (void) ini_parse_file(config_file, | |
239 | (ini_entry_handler) config_entry_handler_filter, | |
240 | (void *) &filter); | |
241 | fclose(config_file); | |
242 | } | |
243 | } | |
244 | ||
245 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
246 | if (override_path) { |
247 | config_file = fopen(override_path, "r"); | |
248 | if (config_file) { | |
7ab02a27 DG |
249 | DBG("Loading daemon command line conf file at %s", override_path); |
250 | (void) ini_parse_file(config_file, | |
251 | (ini_entry_handler) config_entry_handler_filter, | |
252 | (void *) &filter); | |
253 | fclose(config_file); | |
1501a7f3 JG |
254 | } else { |
255 | ERR("Failed to open daemon configuration file at %s", | |
256 | override_path); | |
257 | ret = -ENOENT; | |
7ab02a27 | 258 | goto error; |
1501a7f3 JG |
259 | } |
260 | } | |
261 | ||
7ab02a27 DG |
262 | /* Everything went well. */ |
263 | ret = 0; | |
1501a7f3 | 264 | |
7ab02a27 | 265 | error: |
1501a7f3 JG |
266 | return ret; |
267 | } | |
268 | ||
269 | LTTNG_HIDDEN | |
270 | int config_parse_value(const char *value) | |
271 | { | |
272 | int i, ret = 0; | |
273 | char *endptr, *lower_str; | |
274 | size_t len; | |
275 | unsigned long v; | |
276 | ||
277 | len = strlen(value); | |
278 | if (!len) { | |
279 | ret = -1; | |
280 | goto end; | |
281 | } | |
282 | ||
283 | v = strtoul(value, &endptr, 10); | |
284 | if (endptr != value) { | |
285 | ret = v; | |
286 | goto end; | |
287 | } | |
288 | ||
289 | lower_str = zmalloc(len + 1); | |
290 | if (!lower_str) { | |
291 | PERROR("zmalloc"); | |
292 | ret = -errno; | |
293 | goto end; | |
294 | } | |
295 | ||
296 | for (i = 0; i < len; i++) { | |
297 | lower_str[i] = tolower(value[i]); | |
298 | } | |
299 | ||
300 | if (!strcmp(lower_str, config_str_yes) || | |
301 | !strcmp(lower_str, config_str_true) || | |
302 | !strcmp(lower_str, config_str_on)) { | |
303 | ret = 1; | |
304 | } else if (!strcmp(lower_str, config_str_no) || | |
305 | !strcmp(lower_str, config_str_false) || | |
306 | !strcmp(lower_str, config_str_off)) { | |
307 | ret = 0; | |
308 | } else { | |
309 | ret = -1; | |
310 | } | |
311 | ||
312 | free(lower_str); | |
313 | end: | |
314 | return ret; | |
315 | } | |
36f2332b JG |
316 | |
317 | /* | |
318 | * Returns a xmlChar string which must be released using xmlFree(). | |
319 | */ | |
320 | static xmlChar *encode_string(const char *in_str) | |
321 | { | |
322 | xmlChar *out_str = NULL; | |
323 | xmlCharEncodingHandlerPtr handler; | |
324 | int out_len, ret, in_len; | |
325 | ||
326 | assert(in_str); | |
327 | ||
328 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
329 | if (!handler) { | |
330 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
331 | goto end; | |
332 | } | |
333 | ||
334 | in_len = strlen(in_str); | |
335 | /* | |
336 | * Add 1 byte for the NULL terminted character. The factor 2 here is | |
337 | * because UTF-8 can be on two bytes so this fits the worst case for each | |
338 | * bytes. | |
339 | */ | |
340 | out_len = (in_len * 2) + 1; | |
341 | out_str = xmlMalloc(out_len); | |
342 | if (!out_str) { | |
343 | goto end; | |
344 | } | |
345 | ||
346 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
347 | if (ret < 0) { | |
348 | xmlFree(out_str); | |
349 | out_str = NULL; | |
350 | goto end; | |
351 | } | |
352 | ||
353 | /* out_len is now the size of out_str */ | |
354 | out_str[out_len] = '\0'; | |
355 | end: | |
356 | return out_str; | |
357 | } | |
358 | ||
359 | LTTNG_HIDDEN | |
705bb62f | 360 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
361 | { |
362 | int ret; | |
363 | struct config_writer *writer; | |
364 | xmlOutputBufferPtr buffer; | |
365 | ||
366 | writer = zmalloc(sizeof(struct config_writer)); | |
367 | if (!writer) { | |
368 | PERROR("zmalloc config_writer_create"); | |
369 | goto end; | |
370 | } | |
371 | ||
372 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
373 | if (!buffer) { | |
374 | goto error_destroy; | |
375 | } | |
376 | ||
377 | writer->writer = xmlNewTextWriter(buffer); | |
378 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
379 | config_xml_encoding, NULL); | |
380 | if (ret < 0) { | |
381 | goto error_destroy; | |
382 | } | |
383 | ||
384 | ret = xmlTextWriterSetIndentString(writer->writer, | |
385 | BAD_CAST config_xml_indent_string); | |
705bb62f | 386 | if (ret) { |
36f2332b JG |
387 | goto error_destroy; |
388 | } | |
389 | ||
705bb62f JRJ |
390 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
391 | if (ret) { | |
36f2332b JG |
392 | goto error_destroy; |
393 | } | |
394 | ||
395 | end: | |
396 | return writer; | |
397 | error_destroy: | |
398 | config_writer_destroy(writer); | |
399 | return NULL; | |
400 | } | |
401 | ||
402 | LTTNG_HIDDEN | |
403 | int config_writer_destroy(struct config_writer *writer) | |
404 | { | |
405 | int ret = 0; | |
406 | ||
407 | if (!writer) { | |
408 | ret = -EINVAL; | |
409 | goto end; | |
410 | } | |
411 | ||
412 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
413 | WARN("Could not close XML document"); | |
414 | ret = -EIO; | |
415 | } | |
416 | ||
417 | if (writer->writer) { | |
418 | xmlFreeTextWriter(writer->writer); | |
419 | } | |
420 | ||
421 | free(writer); | |
422 | end: | |
423 | return ret; | |
424 | } | |
425 | ||
426 | LTTNG_HIDDEN | |
427 | int config_writer_open_element(struct config_writer *writer, | |
428 | const char *element_name) | |
429 | { | |
430 | int ret; | |
431 | xmlChar *encoded_element_name; | |
432 | ||
433 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
434 | ret = -1; | |
435 | goto end; | |
436 | } | |
437 | ||
438 | encoded_element_name = encode_string(element_name); | |
439 | if (!encoded_element_name) { | |
440 | ret = -1; | |
441 | goto end; | |
442 | } | |
443 | ||
444 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
445 | xmlFree(encoded_element_name); | |
446 | end: | |
447 | return ret > 0 ? 0 : ret; | |
448 | } | |
449 | ||
450 | LTTNG_HIDDEN | |
451 | int config_writer_close_element(struct config_writer *writer) | |
452 | { | |
453 | int ret; | |
454 | ||
455 | if (!writer || !writer->writer) { | |
456 | ret = -1; | |
457 | goto end; | |
458 | } | |
459 | ||
460 | ret = xmlTextWriterEndElement(writer->writer); | |
461 | end: | |
462 | return ret > 0 ? 0 : ret; | |
463 | } | |
464 | ||
465 | LTTNG_HIDDEN | |
466 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
467 | const char *element_name, uint64_t value) | |
468 | { | |
469 | int ret; | |
470 | xmlChar *encoded_element_name; | |
471 | ||
472 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
473 | ret = -1; | |
474 | goto end; | |
475 | } | |
476 | ||
477 | encoded_element_name = encode_string(element_name); | |
478 | if (!encoded_element_name) { | |
479 | ret = -1; | |
480 | goto end; | |
481 | } | |
482 | ||
483 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
484 | encoded_element_name, "%" PRIu64, value); | |
485 | xmlFree(encoded_element_name); | |
486 | end: | |
487 | return ret > 0 ? 0 : ret; | |
488 | } | |
489 | ||
490 | LTTNG_HIDDEN | |
491 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
492 | const char *element_name, int64_t value) | |
493 | { | |
494 | int ret; | |
495 | xmlChar *encoded_element_name; | |
496 | ||
497 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
498 | ret = -1; | |
499 | goto end; | |
500 | } | |
501 | ||
502 | encoded_element_name = encode_string(element_name); | |
503 | if (!encoded_element_name) { | |
504 | ret = -1; | |
505 | goto end; | |
506 | } | |
507 | ||
508 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
509 | encoded_element_name, "%" PRIi64, value); | |
510 | xmlFree(encoded_element_name); | |
511 | end: | |
512 | return ret > 0 ? 0 : ret; | |
513 | } | |
514 | ||
515 | LTTNG_HIDDEN | |
516 | int config_writer_write_element_bool(struct config_writer *writer, | |
517 | const char *element_name, int value) | |
518 | { | |
519 | return config_writer_write_element_string(writer, element_name, | |
520 | value ? config_xml_true : config_xml_false); | |
521 | } | |
522 | ||
523 | LTTNG_HIDDEN | |
524 | int config_writer_write_element_string(struct config_writer *writer, | |
525 | const char *element_name, const char *value) | |
526 | { | |
527 | int ret; | |
528 | xmlChar *encoded_element_name = NULL; | |
529 | xmlChar *encoded_value = NULL; | |
530 | ||
531 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
532 | !value) { | |
533 | ret = -1; | |
534 | goto end; | |
535 | } | |
536 | ||
537 | encoded_element_name = encode_string(element_name); | |
538 | if (!encoded_element_name) { | |
539 | ret = -1; | |
540 | goto end; | |
541 | } | |
542 | ||
543 | encoded_value = encode_string(value); | |
544 | if (!encoded_value) { | |
545 | ret = -1; | |
546 | goto end; | |
547 | } | |
548 | ||
549 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 550 | encoded_value); |
36f2332b JG |
551 | end: |
552 | xmlFree(encoded_element_name); | |
553 | xmlFree(encoded_value); | |
554 | return ret > 0 ? 0 : ret; | |
555 | } | |
dcf266c0 JG |
556 | |
557 | static | |
558 | void xml_error_handler(void *ctx, const char *format, ...) | |
559 | { | |
560 | char *errMsg; | |
561 | va_list args; | |
562 | int ret; | |
563 | ||
564 | va_start(args, format); | |
565 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 566 | va_end(args); |
dcf266c0 JG |
567 | if (ret == -1) { |
568 | ERR("String allocation failed in xml error handler"); | |
569 | return; | |
570 | } | |
dcf266c0 JG |
571 | |
572 | fprintf(stderr, "XML Error: %s", errMsg); | |
573 | free(errMsg); | |
574 | } | |
575 | ||
576 | static | |
577 | void fini_session_config_validation_ctx( | |
578 | struct session_config_validation_ctx *ctx) | |
579 | { | |
580 | if (ctx->parser_ctx) { | |
581 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
582 | } | |
583 | ||
584 | if (ctx->schema) { | |
585 | xmlSchemaFree(ctx->schema); | |
586 | } | |
587 | ||
588 | if (ctx->schema_validation_ctx) { | |
589 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
590 | } | |
591 | ||
592 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
593 | } | |
594 | ||
54e399cb JG |
595 | static |
596 | char *get_session_config_xsd_path() | |
597 | { | |
598 | char *xsd_path; | |
e8fa9fb0 | 599 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
600 | size_t base_path_len; |
601 | size_t max_path_len; | |
602 | ||
603 | if (!base_path) { | |
604 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
605 | } | |
606 | ||
607 | base_path_len = strlen(base_path); | |
608 | max_path_len = base_path_len + | |
609 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
610 | xsd_path = zmalloc(max_path_len); | |
611 | if (!xsd_path) { | |
612 | goto end; | |
613 | } | |
614 | ||
615 | strncpy(xsd_path, base_path, max_path_len); | |
616 | if (xsd_path[base_path_len - 1] != '/') { | |
617 | xsd_path[base_path_len++] = '/'; | |
618 | } | |
619 | ||
620 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
621 | max_path_len - base_path_len); | |
622 | end: | |
623 | return xsd_path; | |
624 | } | |
625 | ||
dcf266c0 JG |
626 | static |
627 | int init_session_config_validation_ctx( | |
628 | struct session_config_validation_ctx *ctx) | |
629 | { | |
630 | int ret; | |
54e399cb JG |
631 | char *xsd_path = get_session_config_xsd_path(); |
632 | ||
633 | if (!xsd_path) { | |
634 | ret = -LTTNG_ERR_NOMEM; | |
635 | goto end; | |
636 | } | |
dcf266c0 | 637 | |
54e399cb | 638 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
639 | if (!ctx->parser_ctx) { |
640 | ERR("XSD parser context creation failed"); | |
641 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
642 | goto end; | |
643 | } | |
644 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
645 | xml_error_handler, NULL); | |
646 | ||
647 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
648 | if (!ctx->schema) { | |
649 | ERR("XSD parsing failed"); | |
650 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
651 | goto end; | |
652 | } | |
653 | ||
654 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
655 | if (!ctx->schema_validation_ctx) { | |
656 | ERR("XSD validation context creation failed"); | |
657 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
658 | goto end; | |
659 | } | |
660 | ||
661 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
662 | xml_error_handler, NULL); | |
663 | ret = 0; | |
664 | ||
665 | end: | |
666 | if (ret) { | |
667 | fini_session_config_validation_ctx(ctx); | |
668 | } | |
669 | ||
54e399cb | 670 | free(xsd_path); |
dcf266c0 JG |
671 | return ret; |
672 | } | |
673 | ||
674 | static | |
675 | int parse_uint(xmlChar *str, uint64_t *val) | |
676 | { | |
677 | int ret; | |
678 | char *endptr; | |
679 | ||
680 | if (!str || !val) { | |
681 | ret = -1; | |
682 | goto end; | |
683 | } | |
684 | ||
685 | *val = strtoull((const char *) str, &endptr, 10); | |
686 | if (!endptr || *endptr) { | |
687 | ret = -1; | |
688 | } else { | |
689 | ret = 0; | |
690 | } | |
691 | ||
692 | end: | |
693 | return ret; | |
694 | } | |
695 | ||
696 | static | |
697 | int parse_int(xmlChar *str, int64_t *val) | |
698 | { | |
699 | int ret; | |
700 | char *endptr; | |
701 | ||
702 | if (!str || !val) { | |
703 | ret = -1; | |
704 | goto end; | |
705 | } | |
706 | ||
707 | *val = strtoll((const char *) str, &endptr, 10); | |
708 | if (!endptr || *endptr) { | |
709 | ret = -1; | |
710 | } else { | |
711 | ret = 0; | |
712 | } | |
713 | ||
714 | end: | |
715 | return ret; | |
716 | } | |
717 | ||
718 | static | |
719 | int parse_bool(xmlChar *str, int *val) | |
720 | { | |
721 | int ret = 0; | |
722 | ||
723 | if (!str || !val) { | |
724 | ret = -1; | |
725 | goto end; | |
726 | } | |
727 | ||
728 | if (!strcmp((const char *) str, config_xml_true)) { | |
729 | *val = 1; | |
730 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
731 | *val = 0; | |
732 | } else { | |
733 | WARN("Invalid boolean value encoutered (%s).", | |
734 | (const char *) str); | |
735 | ret = -1; | |
736 | } | |
737 | end: | |
738 | return ret; | |
739 | } | |
740 | ||
741 | static | |
742 | int get_domain_type(xmlChar *domain) | |
743 | { | |
744 | int ret; | |
745 | ||
746 | if (!domain) { | |
747 | goto error; | |
748 | } | |
749 | ||
750 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
751 | ret = LTTNG_DOMAIN_KERNEL; | |
752 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
753 | ret = LTTNG_DOMAIN_UST; | |
754 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
755 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
756 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
757 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
758 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
759 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
760 | } else { |
761 | goto error; | |
762 | } | |
763 | ||
764 | return ret; | |
765 | error: | |
766 | return -1; | |
767 | } | |
768 | ||
769 | static | |
770 | int get_buffer_type(xmlChar *buffer_type) | |
771 | { | |
772 | int ret; | |
773 | ||
774 | if (!buffer_type) { | |
775 | goto error; | |
776 | } | |
777 | ||
778 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
779 | ret = LTTNG_BUFFER_GLOBAL; | |
780 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
781 | ret = LTTNG_BUFFER_PER_UID; | |
782 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
783 | ret = LTTNG_BUFFER_PER_PID; | |
784 | } else { | |
785 | goto error; | |
786 | } | |
787 | ||
788 | return ret; | |
789 | error: | |
790 | return -1; | |
791 | } | |
792 | ||
793 | static | |
794 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
795 | { | |
796 | int ret; | |
797 | ||
798 | if (!overwrite_mode) { | |
799 | goto error; | |
800 | } | |
801 | ||
802 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
803 | ret = 1; | |
804 | } else if (!strcmp((char *) overwrite_mode, | |
805 | config_overwrite_mode_discard)) { | |
806 | ret = 0; | |
807 | } else { | |
808 | goto error; | |
809 | } | |
810 | ||
811 | return ret; | |
812 | error: | |
813 | return -1; | |
814 | } | |
815 | ||
816 | static | |
817 | int get_output_type(xmlChar *output_type) | |
818 | { | |
819 | int ret; | |
820 | ||
821 | if (!output_type) { | |
822 | goto error; | |
823 | } | |
824 | ||
825 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
826 | ret = LTTNG_EVENT_MMAP; | |
827 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
828 | ret = LTTNG_EVENT_SPLICE; | |
829 | } else { | |
830 | goto error; | |
831 | } | |
832 | ||
833 | return ret; | |
834 | error: | |
835 | return -1; | |
836 | } | |
837 | ||
838 | static | |
839 | int get_event_type(xmlChar *event_type) | |
840 | { | |
841 | int ret; | |
842 | ||
843 | if (!event_type) { | |
844 | goto error; | |
845 | } | |
846 | ||
847 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
848 | ret = LTTNG_EVENT_ALL; | |
849 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
850 | ret = LTTNG_EVENT_TRACEPOINT; | |
851 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
852 | ret = LTTNG_EVENT_PROBE; | |
853 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
854 | ret = LTTNG_EVENT_FUNCTION; | |
855 | } else if (!strcmp((char *) event_type, | |
856 | config_event_type_function_entry)) { | |
857 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
858 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
859 | ret = LTTNG_EVENT_NOOP; | |
860 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
861 | ret = LTTNG_EVENT_SYSCALL; | |
862 | } else { | |
863 | goto error; | |
864 | } | |
865 | ||
866 | return ret; | |
867 | error: | |
868 | return -1; | |
869 | } | |
870 | ||
871 | static | |
872 | int get_loglevel_type(xmlChar *loglevel_type) | |
873 | { | |
874 | int ret; | |
875 | ||
876 | if (!loglevel_type) { | |
877 | goto error; | |
878 | } | |
879 | ||
880 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
881 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
882 | } else if (!strcmp((char *) loglevel_type, | |
883 | config_loglevel_type_range)) { | |
884 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
885 | } else if (!strcmp((char *) loglevel_type, | |
886 | config_loglevel_type_single)) { | |
887 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
888 | } else { | |
889 | goto error; | |
890 | } | |
891 | ||
892 | return ret; | |
893 | error: | |
894 | return -1; | |
895 | } | |
896 | ||
897 | /* | |
898 | * Return the context type or -1 on error. | |
899 | */ | |
900 | static | |
901 | int get_context_type(xmlChar *context_type) | |
902 | { | |
903 | int ret; | |
904 | ||
905 | if (!context_type) { | |
906 | goto error; | |
907 | } | |
908 | ||
909 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
910 | ret = LTTNG_EVENT_CONTEXT_PID; | |
911 | } else if (!strcmp((char *) context_type, | |
912 | config_event_context_procname)) { | |
913 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
914 | } else if (!strcmp((char *) context_type, | |
915 | config_event_context_prio)) { | |
916 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
917 | } else if (!strcmp((char *) context_type, | |
918 | config_event_context_nice)) { | |
919 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
920 | } else if (!strcmp((char *) context_type, | |
921 | config_event_context_vpid)) { | |
922 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
923 | } else if (!strcmp((char *) context_type, | |
924 | config_event_context_tid)) { | |
925 | ret = LTTNG_EVENT_CONTEXT_TID; | |
926 | } else if (!strcmp((char *) context_type, | |
927 | config_event_context_vtid)) { | |
928 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
929 | } else if (!strcmp((char *) context_type, | |
930 | config_event_context_ppid)) { | |
931 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
932 | } else if (!strcmp((char *) context_type, | |
933 | config_event_context_vppid)) { | |
934 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
935 | } else if (!strcmp((char *) context_type, | |
936 | config_event_context_pthread_id)) { | |
937 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
938 | } else if (!strcmp((char *) context_type, | |
939 | config_event_context_hostname)) { | |
940 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
941 | } else if (!strcmp((char *) context_type, | |
942 | config_event_context_ip)) { | |
943 | ret = LTTNG_EVENT_CONTEXT_IP; | |
944 | } else { | |
945 | goto error; | |
946 | } | |
947 | ||
948 | return ret; | |
949 | error: | |
950 | return -1; | |
951 | } | |
952 | ||
953 | static | |
954 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
955 | { | |
956 | int ret; | |
957 | xmlNodePtr node; | |
958 | ||
959 | for (node = xmlFirstElementChild(domain_node); node; | |
960 | node = xmlNextElementSibling(node)) { | |
961 | if (!strcmp((const char *) node->name, config_element_type)) { | |
962 | /* domain type */ | |
963 | xmlChar *node_content = xmlNodeGetContent(node); | |
964 | if (!node_content) { | |
965 | ret = -LTTNG_ERR_NOMEM; | |
966 | goto end; | |
967 | } | |
968 | ||
969 | ret = get_domain_type(node_content); | |
970 | free(node_content); | |
971 | if (ret < 0) { | |
972 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
973 | goto end; | |
974 | } | |
975 | ||
976 | domain->type = ret; | |
977 | } else if (!strcmp((const char *) node->name, | |
978 | config_element_buffer_type)) { | |
979 | /* buffer type */ | |
980 | xmlChar *node_content = xmlNodeGetContent(node); | |
981 | if (!node_content) { | |
982 | ret = -LTTNG_ERR_NOMEM; | |
983 | goto end; | |
984 | } | |
985 | ||
986 | ret = get_buffer_type(node_content); | |
987 | free(node_content); | |
988 | if (ret < 0) { | |
989 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
990 | goto end; | |
991 | } | |
992 | ||
993 | domain->buf_type = ret; | |
994 | } | |
995 | } | |
996 | ret = 0; | |
997 | end: | |
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static | |
1002 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1003 | char **data_uri) | |
1004 | { | |
1005 | xmlNodePtr node; | |
1006 | ||
1007 | for (node = xmlFirstElementChild(net_output_node); node; | |
1008 | node = xmlNextElementSibling(node)) { | |
1009 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1010 | /* control_uri */ | |
1011 | *control_uri = (char *) xmlNodeGetContent(node); | |
1012 | if (!*control_uri) { | |
1013 | break; | |
1014 | } | |
1015 | } else { | |
1016 | /* data_uri */ | |
1017 | *data_uri = (char *) xmlNodeGetContent(node); | |
1018 | if (!*data_uri) { | |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1025 | } | |
1026 | ||
1027 | static | |
1028 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1029 | struct consumer_output *output) | |
1030 | { | |
1031 | int ret; | |
1032 | xmlNodePtr node; | |
1033 | ||
1034 | assert(output); | |
1035 | ||
1036 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1037 | node = xmlNextElementSibling(node)) { | |
1038 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1039 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1040 | ||
1041 | /* enabled */ | |
1042 | if (!enabled_str) { | |
1043 | ret = -LTTNG_ERR_NOMEM; | |
1044 | goto end; | |
1045 | } | |
1046 | ||
1047 | ret = parse_bool(enabled_str, &output->enabled); | |
1048 | free(enabled_str); | |
1049 | if (ret) { | |
1050 | goto end; | |
1051 | } | |
1052 | } else { | |
1053 | xmlNodePtr output_type_node; | |
1054 | ||
1055 | /* destination */ | |
1056 | output_type_node = xmlFirstElementChild(node); | |
1057 | if (!output_type_node) { | |
1058 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1059 | goto end; | |
1060 | } | |
1061 | ||
1062 | if (!strcmp((const char *) output_type_node->name, | |
1063 | config_element_path)) { | |
1064 | /* path */ | |
1065 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1066 | if (!output->path) { | |
1067 | ret = -LTTNG_ERR_NOMEM; | |
1068 | goto end; | |
1069 | } | |
1070 | } else { | |
1071 | /* net_output */ | |
1072 | ret = get_net_output_uris(output_type_node, | |
1073 | &output->control_uri, &output->data_uri); | |
1074 | if (ret) { | |
1075 | goto end; | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | ret = 0; | |
1081 | ||
1082 | end: | |
1083 | if (ret) { | |
1084 | free(output->path); | |
1085 | free(output->control_uri); | |
1086 | free(output->data_uri); | |
1087 | memset(output, 0, sizeof(struct consumer_output)); | |
1088 | } | |
1089 | return ret; | |
1090 | } | |
1091 | ||
1092 | static | |
1093 | int create_session_net_output(const char *name, struct lttng_domain *domain, | |
1094 | const char *control_uri, const char *data_uri) | |
1095 | { | |
1096 | int ret; | |
1097 | struct lttng_handle *handle; | |
1098 | const char *uri = NULL; | |
1099 | ||
1100 | assert(name); | |
1101 | assert(domain); | |
1102 | ||
1103 | handle = lttng_create_handle(name, domain); | |
1104 | if (!handle) { | |
1105 | ret = -LTTNG_ERR_NOMEM; | |
1106 | goto end; | |
1107 | } | |
1108 | ||
1109 | if (!control_uri || !data_uri) { | |
1110 | uri = control_uri ? control_uri : data_uri; | |
1111 | control_uri = uri; | |
1112 | data_uri = uri; | |
1113 | } | |
1114 | ||
1115 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1116 | lttng_destroy_handle(handle); | |
1117 | end: | |
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | static | |
1122 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node) | |
1123 | { | |
1124 | int ret; | |
1125 | xmlNodePtr node = NULL; | |
1126 | xmlNodePtr snapshot_output_list_node; | |
1127 | xmlNodePtr snapshot_output_node; | |
1128 | ||
1129 | assert(session_name); | |
1130 | ||
1131 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1132 | if (ret) { | |
1133 | goto end; | |
1134 | } | |
1135 | ||
1136 | if (!output_node) { | |
1137 | goto end; | |
1138 | } | |
1139 | ||
1140 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1141 | ||
1142 | /* Parse and create snapshot outputs */ | |
1143 | ||
1144 | for (snapshot_output_node = | |
1145 | xmlFirstElementChild(snapshot_output_list_node); | |
1146 | snapshot_output_node; snapshot_output_node = | |
1147 | xmlNextElementSibling(snapshot_output_node)) { | |
1148 | char *name = NULL; | |
1149 | uint64_t max_size = UINT64_MAX; | |
1150 | struct consumer_output output = { 0 }; | |
1151 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1152 | ||
1153 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1154 | node = xmlNextElementSibling(node)) { | |
1155 | if (!strcmp((const char *) node->name, | |
1156 | config_element_name)) { | |
1157 | /* name */ | |
1158 | name = (char *) xmlNodeGetContent(node); | |
1159 | if (!name) { | |
1160 | ret = -LTTNG_ERR_NOMEM; | |
1161 | goto error_snapshot_output; | |
1162 | } | |
1163 | } else if (!strcmp((const char *) node->name, | |
1164 | config_element_max_size)) { | |
1165 | xmlChar *content = xmlNodeGetContent(node); | |
1166 | ||
1167 | /* max_size */ | |
1168 | if (!content) { | |
1169 | ret = -LTTNG_ERR_NOMEM; | |
1170 | goto error_snapshot_output; | |
1171 | } | |
1172 | ret = parse_uint(content, &max_size); | |
1173 | free(content); | |
1174 | if (ret) { | |
1175 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1176 | goto error_snapshot_output; | |
1177 | } | |
1178 | } else { | |
1179 | /* consumer_output */ | |
1180 | ret = process_consumer_output(node, &output); | |
1181 | if (ret) { | |
1182 | goto error_snapshot_output; | |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | snapshot_output = lttng_snapshot_output_create(); | |
1188 | if (!snapshot_output) { | |
1189 | ret = -LTTNG_ERR_NOMEM; | |
1190 | goto error_snapshot_output; | |
1191 | } | |
1192 | ||
1193 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1194 | if (ret) { | |
1195 | goto error_snapshot_output; | |
1196 | } | |
1197 | ||
1198 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1199 | if (ret) { | |
1200 | goto error_snapshot_output; | |
1201 | } | |
1202 | ||
1203 | if (output.path) { | |
1204 | ret = lttng_snapshot_output_set_ctrl_url(output.path, | |
1205 | snapshot_output); | |
1206 | if (ret) { | |
1207 | goto error_snapshot_output; | |
1208 | } | |
1209 | } else { | |
1210 | if (output.control_uri) { | |
1211 | ret = lttng_snapshot_output_set_ctrl_url(output.control_uri, | |
1212 | snapshot_output); | |
1213 | if (ret) { | |
1214 | goto error_snapshot_output; | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | if (output.data_uri) { | |
1219 | ret = lttng_snapshot_output_set_data_url(output.data_uri, | |
1220 | snapshot_output); | |
1221 | if (ret) { | |
1222 | goto error_snapshot_output; | |
1223 | } | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1228 | error_snapshot_output: | |
1229 | free(name); | |
1230 | free(output.path); | |
1231 | free(output.control_uri); | |
1232 | free(output.data_uri); | |
1233 | lttng_snapshot_output_destroy(snapshot_output); | |
1234 | if (ret) { | |
1235 | goto end; | |
1236 | } | |
1237 | } | |
1238 | end: | |
1239 | return ret; | |
1240 | } | |
1241 | ||
1242 | static | |
1243 | int create_session(const char *name, | |
1244 | struct lttng_domain *kernel_domain, | |
1245 | struct lttng_domain *ust_domain, | |
1246 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1247 | struct lttng_domain *log4j_domain, |
dcf266c0 JG |
1248 | xmlNodePtr output_node, |
1249 | uint64_t live_timer_interval) | |
1250 | { | |
1251 | int ret; | |
1252 | struct consumer_output output = { 0 }; | |
1253 | xmlNodePtr consumer_output_node; | |
1254 | ||
1255 | assert(name); | |
dcf266c0 JG |
1256 | |
1257 | if (output_node) { | |
1258 | consumer_output_node = xmlFirstElementChild(output_node); | |
1259 | if (!consumer_output_node) { | |
1260 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1261 | goto end; | |
1262 | } | |
1263 | ||
1264 | if (strcmp((const char *) consumer_output_node->name, | |
1265 | config_element_consumer_output)) { | |
1266 | WARN("Invalid output type, expected %s node", | |
1267 | config_element_consumer_output); | |
1268 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1269 | goto end; | |
1270 | } | |
1271 | ||
1272 | ret = process_consumer_output(consumer_output_node, &output); | |
1273 | if (ret) { | |
1274 | goto end; | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | if (live_timer_interval != UINT64_MAX && | |
1279 | !output.control_uri && !output.data_uri) { | |
1280 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1281 | goto end; | |
1282 | } | |
1283 | ||
1284 | if (output.control_uri || output.data_uri) { | |
1285 | int i; | |
1286 | struct lttng_domain *domain; | |
1287 | struct lttng_domain *domains[] = | |
c8c5f7ce | 1288 | { kernel_domain, ust_domain, jul_domain, log4j_domain }; |
dcf266c0 JG |
1289 | |
1290 | /* network destination */ | |
1291 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1292 | /* |
1293 | * URLs are provided for sure since the test above make sure that | |
1294 | * with a live timer the data and control URIs are provided. So, | |
1295 | * NULL is passed here and will be set right after. | |
1296 | */ | |
1297 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1298 | } else { |
1299 | ret = lttng_create_session(name, NULL); | |
1300 | } | |
1301 | if (ret) { | |
1302 | goto end; | |
1303 | } | |
1304 | ||
301423df | 1305 | for (i = 0; i < (sizeof(domains) / sizeof(domains[0])); i++) { |
dcf266c0 JG |
1306 | domain = domains[i]; |
1307 | if (!domain) { | |
1308 | continue; | |
1309 | } | |
1310 | ||
1311 | ret = create_session_net_output(name, domain, output.control_uri, | |
1312 | output.data_uri); | |
1313 | if (ret) { | |
1314 | goto end; | |
1315 | } | |
1316 | } | |
1317 | } else { | |
1318 | /* either local output or no output */ | |
1319 | ret = lttng_create_session(name, output.path); | |
1320 | if (ret) { | |
1321 | goto end; | |
1322 | } | |
1323 | } | |
1324 | end: | |
1325 | free(output.path); | |
1326 | free(output.control_uri); | |
1327 | free(output.data_uri); | |
1328 | return ret; | |
1329 | } | |
1330 | static | |
1331 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1332 | struct lttng_event_probe_attr *attr) | |
1333 | { | |
1334 | int ret; | |
1335 | ||
1336 | assert(probe_attribute_node); | |
1337 | assert(attr); | |
1338 | ||
1339 | if (!strcmp((const char *) probe_attribute_node->name, | |
1340 | config_element_address)) { | |
1341 | xmlChar *content; | |
1342 | uint64_t addr = 0; | |
1343 | ||
1344 | /* addr */ | |
1345 | content = xmlNodeGetContent(probe_attribute_node); | |
1346 | if (!content) { | |
1347 | ret = -LTTNG_ERR_NOMEM; | |
1348 | goto end; | |
1349 | } | |
1350 | ||
1351 | ret = parse_uint(content, &addr); | |
1352 | free(content); | |
1353 | if (ret) { | |
1354 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1355 | goto end; | |
1356 | } | |
1357 | ||
1358 | attr->addr = addr; | |
1359 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1360 | config_element_offset)) { | |
1361 | xmlChar *content; | |
1362 | uint64_t offset = 0; | |
1363 | ||
1364 | /* offset */ | |
1365 | content = xmlNodeGetContent(probe_attribute_node); | |
1366 | if (!content) { | |
1367 | ret = -LTTNG_ERR_NOMEM; | |
1368 | goto end; | |
1369 | } | |
1370 | ||
1371 | ret = parse_uint(content, &offset); | |
1372 | free(content); | |
1373 | if (ret) { | |
1374 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1375 | goto end; | |
1376 | } | |
1377 | ||
1378 | attr->offset = offset; | |
1379 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1380 | config_element_symbol_name)) { | |
1381 | xmlChar *content; | |
1382 | size_t name_len; | |
1383 | ||
1384 | /* symbol_name */ | |
1385 | content = xmlNodeGetContent(probe_attribute_node); | |
1386 | if (!content) { | |
1387 | ret = -LTTNG_ERR_NOMEM; | |
1388 | goto end; | |
1389 | } | |
1390 | ||
1391 | name_len = strlen((char *) content); | |
1392 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1393 | WARN("symbol_name too long."); | |
1394 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1395 | free(content); | |
1396 | goto end; | |
1397 | } | |
1398 | ||
1399 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1400 | free(content); | |
1401 | } | |
1402 | ret = 0; | |
1403 | end: | |
1404 | return ret; | |
1405 | } | |
1406 | ||
1407 | static | |
1408 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
1409 | const char *channel_name) | |
1410 | { | |
1411 | int ret, i; | |
1412 | xmlNodePtr node; | |
1413 | struct lttng_event event; | |
1414 | char **exclusions = NULL; | |
1415 | unsigned long exclusion_count = 0; | |
1416 | char *filter_expression = NULL; | |
1417 | ||
1418 | assert(event_node); | |
1419 | assert(handle); | |
1420 | assert(channel_name); | |
1421 | ||
1422 | memset(&event, 0, sizeof(event)); | |
1423 | ||
1424 | for (node = xmlFirstElementChild(event_node); node; | |
1425 | node = xmlNextElementSibling(node)) { | |
1426 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1427 | xmlChar *content; | |
1428 | size_t name_len; | |
1429 | ||
1430 | /* name */ | |
1431 | content = xmlNodeGetContent(node); | |
1432 | if (!content) { | |
1433 | ret = -LTTNG_ERR_NOMEM; | |
1434 | goto end; | |
1435 | } | |
1436 | ||
1437 | name_len = strlen((char *) content); | |
1438 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1439 | WARN("Channel name too long."); | |
1440 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1441 | free(content); | |
1442 | goto end; | |
1443 | } | |
1444 | ||
1445 | strncpy(event.name, (const char *) content, name_len); | |
1446 | free(content); | |
1447 | } else if (!strcmp((const char *) node->name, | |
1448 | config_element_enabled)) { | |
1449 | xmlChar *content = xmlNodeGetContent(node); | |
1450 | ||
1451 | /* enabled */ | |
1452 | if (!content) { | |
1453 | ret = -LTTNG_ERR_NOMEM; | |
1454 | goto end; | |
1455 | } | |
1456 | ||
1457 | ret = parse_bool(content, &event.enabled); | |
1458 | free(content); | |
1459 | if (ret) { | |
1460 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1461 | goto end; | |
1462 | } | |
1463 | } else if (!strcmp((const char *) node->name, | |
1464 | config_element_type)) { | |
1465 | xmlChar *content = xmlNodeGetContent(node); | |
1466 | ||
1467 | /* type */ | |
1468 | if (!content) { | |
1469 | ret = -LTTNG_ERR_NOMEM; | |
1470 | goto end; | |
1471 | } | |
1472 | ||
1473 | ret = get_event_type(content); | |
1474 | free(content); | |
1475 | if (ret < 0) { | |
1476 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1477 | goto end; | |
1478 | } | |
1479 | ||
1480 | event.type = ret; | |
1481 | } else if (!strcmp((const char *) node->name, | |
1482 | config_element_loglevel_type)) { | |
1483 | xmlChar *content = xmlNodeGetContent(node); | |
1484 | ||
1485 | /* loglevel_type */ | |
1486 | if (!content) { | |
1487 | ret = -LTTNG_ERR_NOMEM; | |
1488 | goto end; | |
1489 | } | |
1490 | ||
1491 | ret = get_loglevel_type(content); | |
1492 | free(content); | |
1493 | if (ret < 0) { | |
1494 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1495 | goto end; | |
1496 | } | |
1497 | ||
1498 | event.loglevel_type = ret; | |
1499 | } else if (!strcmp((const char *) node->name, | |
1500 | config_element_loglevel)) { | |
1501 | xmlChar *content; | |
1502 | int64_t loglevel = 0; | |
1503 | ||
1504 | /* loglevel */ | |
1505 | content = xmlNodeGetContent(node); | |
1506 | if (!content) { | |
1507 | ret = -LTTNG_ERR_NOMEM; | |
1508 | goto end; | |
1509 | } | |
1510 | ||
1511 | ret = parse_int(content, &loglevel); | |
1512 | free(content); | |
1513 | if (ret) { | |
1514 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1515 | goto end; | |
1516 | } | |
1517 | ||
1518 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1519 | WARN("loglevel out of range."); | |
1520 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1521 | goto end; | |
1522 | } | |
1523 | ||
1524 | event.loglevel = loglevel; | |
1525 | } else if (!strcmp((const char *) node->name, | |
1526 | config_element_filter)) { | |
1527 | xmlChar *content = | |
1528 | xmlNodeGetContent(node); | |
1529 | ||
1530 | /* filter */ | |
1531 | if (!content) { | |
1532 | ret = -LTTNG_ERR_NOMEM; | |
1533 | goto end; | |
1534 | } | |
1535 | ||
1536 | filter_expression = strdup((char *) content); | |
1537 | free(content); | |
1538 | if (!filter_expression) { | |
1539 | ret = -LTTNG_ERR_NOMEM; | |
1540 | goto end; | |
1541 | } | |
1542 | } else if (!strcmp((const char *) node->name, | |
1543 | config_element_exclusions)) { | |
1544 | xmlNodePtr exclusion_node; | |
1545 | int exclusion_index = 0; | |
1546 | ||
1547 | /* exclusions */ | |
1548 | if (exclusions) { | |
1549 | /* | |
1550 | * Exclusions has already been initialized, | |
1551 | * invalid file. | |
1552 | */ | |
1553 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1554 | goto end; | |
1555 | } | |
1556 | ||
1557 | exclusion_count = xmlChildElementCount(node); | |
1558 | if (!exclusion_count) { | |
1559 | continue; | |
1560 | } | |
1561 | ||
1562 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1563 | if (!exclusions) { | |
1564 | exclusion_count = 0; | |
1565 | ret = -LTTNG_ERR_NOMEM; | |
1566 | goto end; | |
1567 | } | |
1568 | ||
1569 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1570 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1571 | xmlChar *content = | |
1572 | xmlNodeGetContent(exclusion_node); | |
1573 | ||
1574 | if (!content) { | |
1575 | ret = -LTTNG_ERR_NOMEM; | |
1576 | goto end; | |
1577 | } | |
1578 | ||
1579 | exclusions[exclusion_index] = strdup((const char *) content); | |
1580 | free(content); | |
1581 | if (!exclusions[exclusion_index]) { | |
1582 | ret = -LTTNG_ERR_NOMEM; | |
1583 | goto end; | |
1584 | } | |
1585 | exclusion_index++; | |
1586 | } | |
1587 | ||
1588 | event.exclusion = 1; | |
1589 | } else if (!strcmp((const char *) node->name, | |
1590 | config_element_attributes)) { | |
1591 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1592 | ||
1593 | /* attributes */ | |
1594 | if (!attribute_node) { | |
1595 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1596 | goto end; | |
1597 | } | |
1598 | ||
1599 | if (!strcmp((const char *) node->name, | |
1600 | config_element_probe_attributes)) { | |
1601 | xmlNodePtr probe_attribute_node; | |
1602 | ||
1603 | /* probe_attributes */ | |
1604 | for (probe_attribute_node = | |
1605 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1606 | probe_attribute_node = xmlNextElementSibling( | |
1607 | probe_attribute_node)) { | |
1608 | ||
1609 | ret = process_probe_attribute_node(probe_attribute_node, | |
1610 | &event.attr.probe); | |
1611 | if (ret) { | |
1612 | goto end; | |
1613 | } | |
1614 | } | |
1615 | } else { | |
1616 | size_t sym_len; | |
1617 | xmlChar *content; | |
1618 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1619 | ||
1620 | /* function_attributes */ | |
1621 | content = xmlNodeGetContent(symbol_node); | |
1622 | if (!content) { | |
1623 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1624 | goto end; | |
1625 | } | |
1626 | ||
1627 | sym_len = strlen((char *) content); | |
1628 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1629 | WARN("Function name too long."); | |
1630 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1631 | free(content); | |
1632 | goto end; | |
1633 | } | |
1634 | ||
1635 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1636 | sym_len); | |
1637 | free(content); | |
1638 | } | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1643 | filter_expression, exclusion_count, exclusions); | |
065321e9 JG |
1644 | if (ret) { |
1645 | goto end; | |
1646 | } | |
1647 | ||
1648 | if (!event.enabled) { | |
1649 | /* | |
1650 | * Note that we should use lttng_disable_event_ext() (2.6+) to | |
1651 | * eliminate the risk of clashing on events of the same | |
1652 | * name (with different event types and loglevels). | |
1653 | * | |
1654 | * Unfortunately, lttng_disable_event_ext() only performs a | |
1655 | * match on the name and event type and errors out if any other | |
1656 | * event attribute is not set to its default value. | |
1657 | * | |
1658 | * This will disable all events that match this name. | |
1659 | */ | |
1660 | ret = lttng_disable_event(handle, event.name, channel_name); | |
1661 | } | |
dcf266c0 JG |
1662 | end: |
1663 | for (i = 0; i < exclusion_count; i++) { | |
1664 | free(exclusions[i]); | |
1665 | } | |
1666 | ||
1667 | free(exclusions); | |
1668 | free(filter_expression); | |
1669 | return ret; | |
1670 | } | |
1671 | ||
1672 | static | |
1673 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1674 | const char *channel_name) | |
1675 | { | |
1676 | int ret = 0; | |
1677 | xmlNodePtr node; | |
1678 | ||
1679 | assert(events_node); | |
1680 | assert(handle); | |
1681 | assert(channel_name); | |
1682 | ||
1683 | for (node = xmlFirstElementChild(events_node); node; | |
1684 | node = xmlNextElementSibling(node)) { | |
1685 | ret = process_event_node(node, handle, channel_name); | |
1686 | if (ret) { | |
1687 | goto end; | |
1688 | } | |
1689 | } | |
1690 | end: | |
1691 | return ret; | |
1692 | } | |
1693 | ||
1694 | static | |
1695 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1696 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1697 | xmlNodePtr *events_node) | |
1698 | { | |
1699 | int ret; | |
1700 | ||
1701 | assert(attr_node); | |
1702 | assert(channel); | |
1703 | assert(contexts_node); | |
1704 | assert(events_node); | |
1705 | ||
1706 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1707 | xmlChar *content; | |
1708 | size_t name_len; | |
1709 | ||
1710 | /* name */ | |
1711 | content = xmlNodeGetContent(attr_node); | |
1712 | if (!content) { | |
1713 | ret = -LTTNG_ERR_NOMEM; | |
1714 | goto end; | |
1715 | } | |
1716 | ||
1717 | name_len = strlen((char *) content); | |
1718 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1719 | WARN("Channel name too long."); | |
1720 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1721 | free(content); | |
1722 | goto end; | |
1723 | } | |
1724 | ||
1725 | strncpy(channel->name, (const char *) content, name_len); | |
1726 | free(content); | |
1727 | } else if (!strcmp((const char *) attr_node->name, | |
1728 | config_element_enabled)) { | |
1729 | xmlChar *content; | |
1730 | int enabled; | |
1731 | ||
1732 | /* enabled */ | |
1733 | content = xmlNodeGetContent(attr_node); | |
1734 | if (!content) { | |
1735 | ret = -LTTNG_ERR_NOMEM; | |
1736 | goto end; | |
1737 | } | |
1738 | ||
1739 | ret = parse_bool(content, &enabled); | |
1740 | free(content); | |
1741 | if (ret) { | |
1742 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1743 | goto end; | |
1744 | } | |
1745 | ||
1746 | channel->enabled = enabled; | |
1747 | } else if (!strcmp((const char *) attr_node->name, | |
1748 | config_element_overwrite_mode)) { | |
1749 | xmlChar *content; | |
1750 | ||
1751 | /* overwrite_mode */ | |
1752 | content = xmlNodeGetContent(attr_node); | |
1753 | if (!content) { | |
1754 | ret = -LTTNG_ERR_NOMEM; | |
1755 | goto end; | |
1756 | } | |
1757 | ||
1758 | ret = get_overwrite_mode(content); | |
1759 | free(content); | |
1760 | if (ret < 0) { | |
1761 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1762 | goto end; | |
1763 | } | |
1764 | ||
1765 | channel->attr.overwrite = ret; | |
1766 | } else if (!strcmp((const char *) attr_node->name, | |
1767 | config_element_subbuf_size)) { | |
1768 | xmlChar *content; | |
1769 | ||
1770 | /* subbuffer_size */ | |
1771 | content = xmlNodeGetContent(attr_node); | |
1772 | if (!content) { | |
1773 | ret = -LTTNG_ERR_NOMEM; | |
1774 | goto end; | |
1775 | } | |
1776 | ||
1777 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1778 | free(content); | |
1779 | if (ret) { | |
1780 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1781 | goto end; | |
1782 | } | |
1783 | } else if (!strcmp((const char *) attr_node->name, | |
1784 | config_element_num_subbuf)) { | |
1785 | xmlChar *content; | |
1786 | ||
1787 | /* subbuffer_count */ | |
1788 | content = xmlNodeGetContent(attr_node); | |
1789 | if (!content) { | |
1790 | ret = -LTTNG_ERR_NOMEM; | |
1791 | goto end; | |
1792 | } | |
1793 | ||
1794 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1795 | free(content); | |
1796 | if (ret) { | |
1797 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1798 | goto end; | |
1799 | } | |
1800 | } else if (!strcmp((const char *) attr_node->name, | |
1801 | config_element_switch_timer_interval)) { | |
1802 | xmlChar *content; | |
1803 | uint64_t switch_timer_interval = 0; | |
1804 | ||
1805 | /* switch_timer_interval */ | |
1806 | content = xmlNodeGetContent(attr_node); | |
1807 | if (!content) { | |
1808 | ret = -LTTNG_ERR_NOMEM; | |
1809 | goto end; | |
1810 | } | |
1811 | ||
1812 | ret = parse_uint(content, &switch_timer_interval); | |
1813 | free(content); | |
1814 | if (ret) { | |
1815 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1816 | goto end; | |
1817 | } | |
1818 | ||
1819 | if (switch_timer_interval > UINT_MAX) { | |
1820 | WARN("switch_timer_interval out of range."); | |
1821 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1822 | goto end; | |
1823 | } | |
1824 | ||
1825 | channel->attr.switch_timer_interval = | |
1826 | switch_timer_interval; | |
1827 | } else if (!strcmp((const char *) attr_node->name, | |
1828 | config_element_read_timer_interval)) { | |
1829 | xmlChar *content; | |
1830 | uint64_t read_timer_interval = 0; | |
1831 | ||
1832 | /* read_timer_interval */ | |
1833 | content = xmlNodeGetContent(attr_node); | |
1834 | if (!content) { | |
1835 | ret = -LTTNG_ERR_NOMEM; | |
1836 | goto end; | |
1837 | } | |
1838 | ||
1839 | ret = parse_uint(content, &read_timer_interval); | |
1840 | free(content); | |
1841 | if (ret) { | |
1842 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1843 | goto end; | |
1844 | } | |
1845 | ||
1846 | if (read_timer_interval > UINT_MAX) { | |
1847 | WARN("read_timer_interval out of range."); | |
1848 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1849 | goto end; | |
1850 | } | |
1851 | ||
1852 | channel->attr.read_timer_interval = | |
1853 | read_timer_interval; | |
1854 | } else if (!strcmp((const char *) attr_node->name, | |
1855 | config_element_output_type)) { | |
1856 | xmlChar *content; | |
1857 | ||
1858 | /* output_type */ | |
1859 | content = xmlNodeGetContent(attr_node); | |
1860 | if (!content) { | |
1861 | ret = -LTTNG_ERR_NOMEM; | |
1862 | goto end; | |
1863 | } | |
1864 | ||
1865 | ret = get_output_type(content); | |
1866 | free(content); | |
1867 | if (ret < 0) { | |
1868 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1869 | goto end; | |
1870 | } | |
1871 | ||
1872 | channel->attr.output = ret; | |
1873 | } else if (!strcmp((const char *) attr_node->name, | |
1874 | config_element_tracefile_size)) { | |
1875 | xmlChar *content; | |
1876 | ||
1877 | /* tracefile_size */ | |
1878 | content = xmlNodeGetContent(attr_node); | |
1879 | if (!content) { | |
1880 | ret = -LTTNG_ERR_NOMEM; | |
1881 | goto end; | |
1882 | } | |
1883 | ||
1884 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
1885 | free(content); | |
1886 | if (ret) { | |
1887 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1888 | goto end; | |
1889 | } | |
1890 | } else if (!strcmp((const char *) attr_node->name, | |
1891 | config_element_tracefile_count)) { | |
1892 | xmlChar *content; | |
1893 | ||
1894 | /* tracefile_count */ | |
1895 | content = xmlNodeGetContent(attr_node); | |
1896 | if (!content) { | |
1897 | ret = -LTTNG_ERR_NOMEM; | |
1898 | goto end; | |
1899 | } | |
1900 | ||
1901 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
1902 | free(content); | |
1903 | if (ret) { | |
1904 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1905 | goto end; | |
1906 | } | |
1907 | } else if (!strcmp((const char *) attr_node->name, | |
1908 | config_element_live_timer_interval)) { | |
1909 | xmlChar *content; | |
1910 | uint64_t live_timer_interval = 0; | |
1911 | ||
1912 | /* live_timer_interval */ | |
1913 | content = xmlNodeGetContent(attr_node); | |
1914 | if (!content) { | |
1915 | ret = -LTTNG_ERR_NOMEM; | |
1916 | goto end; | |
1917 | } | |
1918 | ||
1919 | ret = parse_uint(content, &live_timer_interval); | |
1920 | free(content); | |
1921 | if (ret) { | |
1922 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1923 | goto end; | |
1924 | } | |
1925 | ||
1926 | if (live_timer_interval > UINT_MAX) { | |
1927 | WARN("live_timer_interval out of range."); | |
1928 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1929 | goto end; | |
1930 | } | |
1931 | ||
1932 | channel->attr.live_timer_interval = | |
1933 | live_timer_interval; | |
1934 | } else if (!strcmp((const char *) attr_node->name, | |
1935 | config_element_events)) { | |
1936 | /* events */ | |
1937 | *events_node = attr_node; | |
1938 | } else { | |
1939 | /* contexts */ | |
1940 | *contexts_node = attr_node; | |
1941 | } | |
1942 | ret = 0; | |
1943 | end: | |
1944 | return ret; | |
1945 | } | |
1946 | ||
1947 | static | |
1948 | int process_context_node(xmlNodePtr context_node, | |
1949 | struct lttng_handle *handle, const char *channel_name) | |
1950 | { | |
1951 | int ret; | |
1952 | struct lttng_event_context context; | |
1953 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
1954 | ||
1955 | assert(handle); | |
1956 | assert(channel_name); | |
1957 | ||
1958 | if (!context_child_node) { | |
1959 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1960 | goto end; | |
1961 | } | |
1962 | ||
1963 | memset(&context, 0, sizeof(context)); | |
1964 | ||
1965 | if (!strcmp((const char *) context_child_node->name, | |
1966 | config_element_type)) { | |
1967 | /* type */ | |
1968 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
1969 | if (!content) { | |
1970 | ret = -LTTNG_ERR_NOMEM; | |
1971 | goto end; | |
1972 | } | |
1973 | ||
1974 | ret = get_context_type(content); | |
1975 | free(content); | |
1976 | if (ret < 0) { | |
1977 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1978 | goto end; | |
1979 | } | |
1980 | ||
1981 | context.ctx = ret; | |
1982 | } else { | |
1983 | xmlNodePtr perf_attr_node; | |
1984 | ||
1985 | /* perf */ | |
14ce5bd8 JG |
1986 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
1987 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
1988 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
1989 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
1990 | perf_attr_node; perf_attr_node = | |
1991 | xmlNextElementSibling(perf_attr_node)) { | |
1992 | if (!strcmp((const char *) perf_attr_node->name, | |
1993 | config_element_type)) { | |
1994 | xmlChar *content; | |
1995 | uint64_t type = 0; | |
1996 | ||
1997 | /* type */ | |
1998 | content = xmlNodeGetContent(perf_attr_node); | |
1999 | if (!content) { | |
2000 | ret = -LTTNG_ERR_NOMEM; | |
2001 | goto end; | |
2002 | } | |
2003 | ||
2004 | ret = parse_uint(content, &type); | |
2005 | free(content); | |
2006 | if (ret) { | |
2007 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2008 | goto end; | |
2009 | } | |
2010 | ||
2011 | if (type > UINT32_MAX) { | |
2012 | WARN("perf context type out of range."); | |
2013 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2014 | goto end; | |
2015 | } | |
2016 | ||
2017 | context.u.perf_counter.type = type; | |
2018 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2019 | config_element_config)) { | |
2020 | xmlChar *content; | |
2021 | uint64_t config = 0; | |
2022 | ||
2023 | /* config */ | |
2024 | content = xmlNodeGetContent(perf_attr_node); | |
2025 | if (!content) { | |
2026 | ret = -LTTNG_ERR_NOMEM; | |
2027 | goto end; | |
2028 | } | |
2029 | ||
2030 | ret = parse_uint(content, &config); | |
2031 | free(content); | |
2032 | if (ret) { | |
2033 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2034 | goto end; | |
2035 | } | |
2036 | ||
2037 | context.u.perf_counter.config = config; | |
2038 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2039 | config_element_name)) { | |
2040 | xmlChar *content; | |
2041 | size_t name_len; | |
2042 | ||
2043 | /* name */ | |
2044 | content = xmlNodeGetContent(perf_attr_node); | |
2045 | if (!content) { | |
2046 | ret = -LTTNG_ERR_NOMEM; | |
2047 | goto end; | |
2048 | } | |
2049 | ||
2050 | name_len = strlen((char *) content); | |
2051 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2052 | WARN("perf context name too long."); | |
2053 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2054 | free(content); | |
2055 | goto end; | |
2056 | } | |
2057 | ||
2058 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2059 | name_len); | |
2060 | free(content); | |
2061 | } | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
2066 | end: | |
2067 | return ret; | |
2068 | } | |
2069 | ||
2070 | static | |
2071 | int process_contexts_node(xmlNodePtr contexts_node, | |
2072 | struct lttng_handle *handle, const char *channel_name) | |
2073 | { | |
2074 | int ret = 0; | |
2075 | xmlNodePtr context_node; | |
2076 | ||
2077 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2078 | context_node = xmlNextElementSibling(context_node)) { | |
2079 | ret = process_context_node(context_node, handle, channel_name); | |
2080 | if (ret) { | |
2081 | goto end; | |
2082 | } | |
2083 | } | |
2084 | end: | |
2085 | return ret; | |
2086 | } | |
2087 | ||
2088 | static | |
2089 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2090 | { | |
2091 | int ret; | |
2092 | struct lttng_domain domain = { 0 }; | |
2093 | struct lttng_handle *handle = NULL; | |
2094 | xmlNodePtr channels_node = NULL; | |
2095 | xmlNodePtr node; | |
2096 | ||
2097 | assert(session_name); | |
2098 | ||
2099 | ret = init_domain(domain_node, &domain); | |
2100 | if (ret) { | |
2101 | goto end; | |
2102 | } | |
2103 | ||
2104 | handle = lttng_create_handle(session_name, &domain); | |
2105 | if (!handle) { | |
2106 | ret = -LTTNG_ERR_NOMEM; | |
2107 | goto end; | |
2108 | } | |
2109 | ||
2110 | /* get the channels node */ | |
2111 | for (node = xmlFirstElementChild(domain_node); node; | |
2112 | node = xmlNextElementSibling(node)) { | |
2113 | if (!strcmp((const char *) node->name, | |
2114 | config_element_channels)) { | |
2115 | channels_node = node; | |
2116 | break; | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | if (!channels_node) { | |
2121 | goto end; | |
2122 | } | |
2123 | ||
2124 | /* create all channels */ | |
2125 | for (node = xmlFirstElementChild(channels_node); node; | |
2126 | node = xmlNextElementSibling(node)) { | |
2127 | struct lttng_channel channel; | |
2128 | xmlNodePtr contexts_node = NULL; | |
2129 | xmlNodePtr events_node = NULL; | |
2130 | xmlNodePtr channel_attr_node; | |
2131 | ||
2132 | memset(&channel, 0, sizeof(channel)); | |
2133 | lttng_channel_set_default_attr(&domain, &channel.attr); | |
2134 | ||
2135 | for (channel_attr_node = xmlFirstElementChild(node); | |
2136 | channel_attr_node; channel_attr_node = | |
2137 | xmlNextElementSibling(channel_attr_node)) { | |
2138 | ret = process_channel_attr_node(channel_attr_node, | |
2139 | &channel, &contexts_node, &events_node); | |
2140 | if (ret) { | |
2141 | goto end; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | ret = lttng_enable_channel(handle, &channel); | |
2146 | if (ret < 0) { | |
2147 | goto end; | |
2148 | } | |
2149 | ||
2150 | ret = process_events_node(events_node, handle, channel.name); | |
2151 | if (ret) { | |
2152 | goto end; | |
2153 | } | |
2154 | ||
2155 | ret = process_contexts_node(contexts_node, handle, | |
2156 | channel.name); | |
2157 | if (ret) { | |
2158 | goto end; | |
2159 | } | |
2160 | } | |
2161 | end: | |
2162 | lttng_destroy_handle(handle); | |
2163 | return ret; | |
2164 | } | |
2165 | ||
2166 | static | |
2167 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
2168 | int override) | |
2169 | { | |
2170 | int ret, started = -1, snapshot_mode = -1; | |
2171 | uint64_t live_timer_interval = UINT64_MAX; | |
2172 | char *name = NULL; | |
2173 | xmlNodePtr domains_node = NULL; | |
2174 | xmlNodePtr output_node = NULL; | |
2175 | xmlNodePtr node; | |
2176 | struct lttng_domain *kernel_domain = NULL; | |
2177 | struct lttng_domain *ust_domain = NULL; | |
2178 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2179 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 2180 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
2181 | |
2182 | for (node = xmlFirstElementChild(session_node); node; | |
2183 | node = xmlNextElementSibling(node)) { | |
2184 | if (!name && !strcmp((const char *) node->name, | |
2185 | config_element_name)) { | |
2186 | /* name */ | |
2187 | xmlChar *node_content = xmlNodeGetContent(node); | |
2188 | if (!node_content) { | |
2189 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2190 | goto error; |
dcf266c0 JG |
2191 | } |
2192 | ||
2193 | name = (char *) node_content; | |
2194 | } else if (!domains_node && !strcmp((const char *) node->name, | |
2195 | config_element_domains)) { | |
2196 | /* domains */ | |
2197 | domains_node = node; | |
2198 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2199 | config_element_started)) { | |
2200 | /* started */ | |
2201 | xmlChar *node_content = xmlNodeGetContent(node); | |
2202 | if (!node_content) { | |
2203 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2204 | goto error; |
dcf266c0 JG |
2205 | } |
2206 | ||
2207 | ret = parse_bool(node_content, &started); | |
2208 | free(node_content); | |
2209 | if (ret) { | |
2210 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2211 | goto error; |
dcf266c0 JG |
2212 | } |
2213 | } else if (!output_node && !strcmp((const char *) node->name, | |
2214 | config_element_output)) { | |
2215 | /* output */ | |
2216 | output_node = node; | |
2217 | } else { | |
2218 | /* attributes, snapshot_mode or live_timer_interval */ | |
2219 | xmlNodePtr attributes_child = | |
2220 | xmlFirstElementChild(node); | |
2221 | ||
2222 | if (!strcmp((const char *) attributes_child->name, | |
2223 | config_element_snapshot_mode)) { | |
2224 | /* snapshot_mode */ | |
2225 | xmlChar *snapshot_mode_content = | |
2226 | xmlNodeGetContent(attributes_child); | |
2227 | if (!snapshot_mode_content) { | |
2228 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2229 | goto error; |
dcf266c0 JG |
2230 | } |
2231 | ||
2232 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2233 | free(snapshot_mode_content); | |
2234 | if (ret) { | |
2235 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2236 | goto error; |
dcf266c0 JG |
2237 | } |
2238 | } else { | |
2239 | /* live_timer_interval */ | |
2240 | xmlChar *timer_interval_content = | |
2241 | xmlNodeGetContent(attributes_child); | |
2242 | if (!timer_interval_content) { | |
2243 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2244 | goto error; |
dcf266c0 JG |
2245 | } |
2246 | ||
2247 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2248 | free(timer_interval_content); | |
2249 | if (ret) { | |
2250 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2251 | goto error; |
dcf266c0 JG |
2252 | } |
2253 | } | |
2254 | } | |
2255 | } | |
2256 | ||
2257 | if (!name) { | |
2258 | /* Mandatory attribute, as defined in the session XSD */ | |
2259 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2260 | goto error; |
dcf266c0 JG |
2261 | } |
2262 | ||
2263 | if (session_name && strcmp(name, session_name)) { | |
2264 | /* This is not the session we are looking for */ | |
c2da8cde DG |
2265 | ret = -LTTNG_ERR_NO_SESSION; |
2266 | goto error; | |
dcf266c0 JG |
2267 | } |
2268 | ||
2269 | /* Init domains to create the session handles */ | |
2270 | for (node = xmlFirstElementChild(domains_node); node; | |
2271 | node = xmlNextElementSibling(node)) { | |
2272 | struct lttng_domain *domain; | |
2273 | ||
2274 | domain = zmalloc(sizeof(*domain)); | |
2275 | if (!domain) { | |
2276 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2277 | goto error; |
dcf266c0 JG |
2278 | } |
2279 | ||
2280 | ret = init_domain(node, domain); | |
2281 | if (ret) { | |
2282 | goto domain_init_error; | |
2283 | } | |
2284 | ||
2285 | switch (domain->type) { | |
2286 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2287 | if (kernel_domain) { |
2288 | /* Same domain seen twice, invalid! */ | |
2289 | goto domain_init_error; | |
2290 | } | |
dcf266c0 JG |
2291 | kernel_domain = domain; |
2292 | break; | |
2293 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2294 | if (ust_domain) { |
2295 | /* Same domain seen twice, invalid! */ | |
2296 | goto domain_init_error; | |
2297 | } | |
dcf266c0 JG |
2298 | ust_domain = domain; |
2299 | break; | |
2300 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2301 | if (jul_domain) { |
2302 | /* Same domain seen twice, invalid! */ | |
2303 | goto domain_init_error; | |
2304 | } | |
dcf266c0 JG |
2305 | jul_domain = domain; |
2306 | break; | |
5cdb6027 DG |
2307 | case LTTNG_DOMAIN_LOG4J: |
2308 | if (log4j_domain) { | |
2309 | /* Same domain seen twice, invalid! */ | |
2310 | goto domain_init_error; | |
2311 | } | |
2312 | log4j_domain = domain; | |
2313 | break; | |
0e115563 DG |
2314 | case LTTNG_DOMAIN_PYTHON: |
2315 | if (python_domain) { | |
2316 | /* Same domain seen twice, invalid! */ | |
2317 | goto domain_init_error; | |
2318 | } | |
2319 | python_domain = domain; | |
2320 | break; | |
dcf266c0 JG |
2321 | default: |
2322 | WARN("Invalid domain type"); | |
2323 | goto domain_init_error; | |
2324 | } | |
2325 | continue; | |
2326 | domain_init_error: | |
2327 | free(domain); | |
2328 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2329 | goto error; |
dcf266c0 JG |
2330 | } |
2331 | ||
2332 | if (override) { | |
2333 | /* Destroy session if it exists */ | |
2334 | ret = lttng_destroy_session(name); | |
2335 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { | |
2336 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2337 | goto error; |
dcf266c0 JG |
2338 | } |
2339 | } | |
2340 | ||
2341 | /* Create session type depending on output type */ | |
2342 | if (snapshot_mode && snapshot_mode != -1) { | |
2343 | ret = create_snapshot_session(name, output_node); | |
2344 | } else if (live_timer_interval && | |
2345 | live_timer_interval != UINT64_MAX) { | |
2346 | ret = create_session(name, kernel_domain, ust_domain, jul_domain, | |
5cdb6027 | 2347 | log4j_domain, output_node, live_timer_interval); |
dcf266c0 JG |
2348 | } else { |
2349 | /* regular session */ | |
2350 | ret = create_session(name, kernel_domain, ust_domain, jul_domain, | |
5cdb6027 | 2351 | log4j_domain, output_node, UINT64_MAX); |
dcf266c0 | 2352 | } |
dcf266c0 | 2353 | if (ret) { |
c2da8cde | 2354 | goto error; |
dcf266c0 JG |
2355 | } |
2356 | ||
2357 | for (node = xmlFirstElementChild(domains_node); node; | |
2358 | node = xmlNextElementSibling(node)) { | |
2359 | ret = process_domain_node(node, name); | |
2360 | if (ret) { | |
2361 | goto end; | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | if (started) { | |
2366 | ret = lttng_start_tracing(name); | |
2367 | if (ret) { | |
2368 | goto end; | |
2369 | } | |
2370 | } | |
c2da8cde | 2371 | |
dcf266c0 | 2372 | end: |
b2579dc1 JG |
2373 | if (ret < 0) { |
2374 | ERR("Failed to load session %s: %s", name, lttng_strerror(ret)); | |
2375 | lttng_destroy_session(name); | |
2376 | } | |
2377 | ||
c2da8cde | 2378 | error: |
dcf266c0 JG |
2379 | free(kernel_domain); |
2380 | free(ust_domain); | |
2381 | free(jul_domain); | |
5cdb6027 | 2382 | free(log4j_domain); |
135a3893 | 2383 | free(python_domain); |
dcf266c0 JG |
2384 | free(name); |
2385 | return ret; | |
2386 | } | |
2387 | ||
cf53c06d DG |
2388 | /* |
2389 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2390 | * Return -1 if the path is EPERM. | |
2391 | */ | |
2392 | static int validate_file_read_creds(const char *path) | |
2393 | { | |
2394 | int ret; | |
2395 | ||
2396 | assert(path); | |
2397 | ||
2398 | /* Can we read the file. */ | |
2399 | ret = access(path, R_OK); | |
2400 | if (!ret) { | |
2401 | goto valid; | |
2402 | } | |
2403 | if (errno == EACCES) { | |
2404 | return -1; | |
2405 | } else { | |
2406 | /* Invalid. */ | |
2407 | return 0; | |
2408 | } | |
2409 | valid: | |
2410 | return 1; | |
2411 | } | |
2412 | ||
dcf266c0 JG |
2413 | static |
2414 | int load_session_from_file(const char *path, const char *session_name, | |
2415 | struct session_config_validation_ctx *validation_ctx, int override) | |
2416 | { | |
2417 | int ret, session_found = !session_name; | |
2418 | xmlDocPtr doc = NULL; | |
2419 | xmlNodePtr sessions_node; | |
2420 | xmlNodePtr session_node; | |
dcf266c0 JG |
2421 | |
2422 | assert(path); | |
2423 | assert(validation_ctx); | |
2424 | ||
cf53c06d DG |
2425 | ret = validate_file_read_creds(path); |
2426 | if (ret != 1) { | |
2427 | if (ret == -1) { | |
2428 | ret = -LTTNG_ERR_EPERM; | |
2429 | } else { | |
2430 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2431 | } | |
dcf266c0 JG |
2432 | goto end; |
2433 | } | |
2434 | ||
2435 | doc = xmlParseFile(path); | |
2436 | if (!doc) { | |
2437 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2438 | goto end; | |
2439 | } | |
2440 | ||
2441 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2442 | if (ret) { | |
2443 | ERR("Session configuration file validation failed"); | |
2444 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2445 | goto end; | |
2446 | } | |
2447 | ||
2448 | sessions_node = xmlDocGetRootElement(doc); | |
2449 | if (!sessions_node) { | |
2450 | goto end; | |
2451 | } | |
2452 | ||
2453 | for (session_node = xmlFirstElementChild(sessions_node); | |
2454 | session_node; session_node = | |
2455 | xmlNextElementSibling(session_node)) { | |
2456 | ret = process_session_node(session_node, | |
2457 | session_name, override); | |
2458 | if (session_name && ret == 0) { | |
2459 | /* Target session found and loaded */ | |
2460 | session_found = 1; | |
2461 | break; | |
2462 | } | |
2463 | } | |
2464 | end: | |
2465 | xmlFreeDoc(doc); | |
2466 | if (!ret) { | |
a96bc65d | 2467 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2468 | } |
2469 | return ret; | |
2470 | } | |
2471 | ||
2472 | static | |
2473 | int load_session_from_path(const char *path, const char *session_name, | |
2474 | struct session_config_validation_ctx *validation_ctx, int override) | |
2475 | { | |
2476 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2477 | DIR *directory = NULL; |
2478 | ||
2479 | assert(path); | |
2480 | assert(validation_ctx); | |
2481 | ||
4af16958 DG |
2482 | directory = opendir(path); |
2483 | if (!directory) { | |
11143783 DG |
2484 | switch (errno) { |
2485 | case ENOTDIR: | |
0f0a81b5 DG |
2486 | /* Try the file loading. */ |
2487 | break; | |
11143783 DG |
2488 | case ENOENT: |
2489 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2490 | goto end; | |
2491 | default: | |
0f0a81b5 DG |
2492 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2493 | goto end; | |
4af16958 | 2494 | } |
dcf266c0 | 2495 | } |
4af16958 | 2496 | if (directory) { |
dcf266c0 JG |
2497 | struct dirent *entry; |
2498 | struct dirent *result; | |
2499 | char *file_path = NULL; | |
2500 | size_t path_len = strlen(path); | |
2501 | ||
2502 | if (path_len >= PATH_MAX) { | |
2503 | ret = -LTTNG_ERR_INVALID; | |
2504 | goto end; | |
2505 | } | |
2506 | ||
2507 | entry = zmalloc(sizeof(*entry)); | |
2508 | if (!entry) { | |
2509 | ret = -LTTNG_ERR_NOMEM; | |
2510 | goto end; | |
2511 | } | |
2512 | ||
dcf266c0 JG |
2513 | file_path = zmalloc(PATH_MAX); |
2514 | if (!file_path) { | |
2515 | ret = -LTTNG_ERR_NOMEM; | |
2516 | free(entry); | |
2517 | goto end; | |
2518 | } | |
2519 | ||
2520 | strncpy(file_path, path, path_len); | |
2521 | if (file_path[path_len - 1] != '/') { | |
2522 | file_path[path_len++] = '/'; | |
2523 | } | |
2524 | ||
4af16958 | 2525 | ret = 0; |
dcf266c0 JG |
2526 | /* Search for *.lttng files */ |
2527 | while (!readdir_r(directory, entry, &result) && result) { | |
2528 | size_t file_name_len = strlen(result->d_name); | |
2529 | ||
2530 | if (file_name_len <= | |
2531 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2532 | continue; | |
2533 | } | |
2534 | ||
431f702e | 2535 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2536 | continue; |
2537 | } | |
2538 | ||
2539 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2540 | result->d_name + file_name_len - sizeof( | |
2541 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2542 | continue; | |
2543 | } | |
2544 | ||
2545 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2546 | file_path[path_len + file_name_len] = '\0'; | |
2547 | ||
2548 | ret = load_session_from_file(file_path, session_name, | |
2549 | validation_ctx, override); | |
2550 | if (session_name && !ret) { | |
2551 | session_found = 1; | |
2552 | break; | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | free(entry); | |
2557 | free(file_path); | |
2558 | } else { | |
2559 | ret = load_session_from_file(path, session_name, | |
2560 | validation_ctx, override); | |
2561 | if (ret) { | |
2562 | goto end; | |
2563 | } else { | |
2564 | session_found = 1; | |
2565 | } | |
2566 | } | |
2567 | ||
2568 | end: | |
2569 | if (directory) { | |
2570 | if (closedir(directory)) { | |
2571 | PERROR("closedir"); | |
2572 | } | |
2573 | } | |
2574 | ||
2575 | if (!session_found) { | |
a96bc65d | 2576 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2577 | } |
2578 | ||
2579 | return ret; | |
2580 | } | |
2581 | ||
ab38c13f DG |
2582 | /* |
2583 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 2584 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
2585 | */ |
2586 | static int validate_path_creds(const char *path) | |
2587 | { | |
2588 | int ret, uid = getuid(); | |
2589 | struct stat buf; | |
2590 | ||
2591 | assert(path); | |
2592 | ||
cf53c06d | 2593 | if (uid == 0) { |
ab38c13f DG |
2594 | goto valid; |
2595 | } | |
2596 | ||
2597 | ret = stat(path, &buf); | |
2598 | if (ret < 0) { | |
2599 | if (errno != ENOENT) { | |
2600 | PERROR("stat"); | |
2601 | } | |
2602 | ret = -LTTNG_ERR_INVALID; | |
2603 | goto valid; | |
2604 | } | |
2605 | ||
2606 | if (buf.st_uid != uid) { | |
2607 | goto invalid; | |
2608 | } | |
2609 | ||
2610 | valid: | |
ab38c13f | 2611 | return 1; |
cf53c06d DG |
2612 | invalid: |
2613 | return 0; | |
ab38c13f DG |
2614 | } |
2615 | ||
dcf266c0 JG |
2616 | LTTNG_HIDDEN |
2617 | int config_load_session(const char *path, const char *session_name, | |
ab38c13f | 2618 | int override, unsigned int autoload) |
dcf266c0 JG |
2619 | { |
2620 | int ret; | |
cf53c06d | 2621 | const char *path_ptr = NULL; |
dcf266c0 JG |
2622 | struct session_config_validation_ctx validation_ctx = { 0 }; |
2623 | ||
2624 | ret = init_session_config_validation_ctx(&validation_ctx); | |
2625 | if (ret) { | |
2626 | goto end; | |
2627 | } | |
2628 | ||
2629 | if (!path) { | |
ab38c13f DG |
2630 | char *home_path; |
2631 | const char *sys_path; | |
2632 | ||
dcf266c0 | 2633 | /* Try home path */ |
ab38c13f | 2634 | home_path = utils_get_home_dir(); |
dcf266c0 | 2635 | if (home_path) { |
ab38c13f | 2636 | char path[PATH_MAX]; |
dcf266c0 | 2637 | |
d4fcf703 DG |
2638 | /* |
2639 | * Try user session configuration path. Ignore error here so we can | |
2640 | * continue loading the system wide sessions. | |
2641 | */ | |
ab38c13f DG |
2642 | if (autoload) { |
2643 | ret = snprintf(path, sizeof(path), | |
2644 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
2645 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
2646 | if (ret < 0) { |
2647 | PERROR("snprintf session autoload home config path"); | |
2648 | goto end; | |
2649 | } | |
2650 | ||
2651 | /* | |
2652 | * Credentials are only validated for the autoload in order to | |
2653 | * avoid any user session daemon to try to load kernel sessions | |
2654 | * automatically and failing all the times. | |
2655 | */ | |
2656 | ret = validate_path_creds(path); | |
2657 | if (ret) { | |
2658 | path_ptr = path; | |
2659 | } | |
ab38c13f DG |
2660 | } else { |
2661 | ret = snprintf(path, sizeof(path), | |
2662 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
2663 | if (ret < 0) { |
2664 | PERROR("snprintf session home config path"); | |
2665 | goto end; | |
2666 | } | |
2667 | path_ptr = path; | |
ab38c13f | 2668 | } |
cf53c06d DG |
2669 | if (path_ptr) { |
2670 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 DG |
2671 | &validation_ctx, override); |
2672 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
2673 | goto end; | |
2674 | } | |
2675 | /* | |
2676 | * Continue even if the session was found since we have to try | |
2677 | * the system wide sessions. | |
2678 | */ | |
ab38c13f | 2679 | } |
d4fcf703 | 2680 | } |
ab38c13f | 2681 | |
cf53c06d DG |
2682 | /* Reset path pointer for the system wide dir. */ |
2683 | path_ptr = NULL; | |
2684 | ||
d4fcf703 DG |
2685 | /* Try system wide configuration directory. */ |
2686 | if (autoload) { | |
2687 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
2688 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
2689 | ret = validate_path_creds(sys_path); |
2690 | if (ret) { | |
2691 | path_ptr = sys_path; | |
2692 | } | |
d4fcf703 | 2693 | } else { |
cf53c06d DG |
2694 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
2695 | path_ptr = sys_path; | |
d4fcf703 DG |
2696 | } |
2697 | ||
cf53c06d DG |
2698 | if (path_ptr) { |
2699 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 | 2700 | &validation_ctx, override); |
dcf266c0 JG |
2701 | } |
2702 | } else { | |
2703 | ret = access(path, F_OK); | |
2704 | if (ret < 0) { | |
2705 | PERROR("access"); | |
2706 | switch (errno) { | |
2707 | case ENOENT: | |
2708 | ret = -LTTNG_ERR_INVALID; | |
2709 | WARN("Session configuration path does not exist."); | |
2710 | break; | |
2711 | case EACCES: | |
2712 | ret = -LTTNG_ERR_EPERM; | |
2713 | break; | |
2714 | default: | |
2715 | ret = -LTTNG_ERR_UNK; | |
2716 | break; | |
2717 | } | |
2718 | goto end; | |
2719 | } | |
2720 | ||
2721 | ret = load_session_from_path(path, session_name, | |
2722 | &validation_ctx, override); | |
2723 | } | |
2724 | end: | |
2725 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
2726 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
2727 | /* | |
2728 | * Don't report an error if no sessions are found when called | |
2729 | * without a session_name or a search path. | |
2730 | */ | |
2731 | ret = 0; | |
2732 | } | |
dcf266c0 JG |
2733 | return ret; |
2734 | } |