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 | |
19 | #include <assert.h> | |
1501a7f3 | 20 | #include <ctype.h> |
1501a7f3 JG |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
36f2332b | 24 | #include <inttypes.h> |
dcf266c0 JG |
25 | #include <dirent.h> |
26 | #include <unistd.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
1501a7f3 JG |
29 | |
30 | #include <common/defaults.h> | |
31 | #include <common/error.h> | |
32 | #include <common/macros.h> | |
33 | #include <common/utils.h> | |
fb198a11 JG |
34 | #include <lttng/lttng-error.h> |
35 | #include <libxml/parser.h> | |
36 | #include <libxml/valid.h> | |
37 | #include <libxml/xmlschemas.h> | |
dcf266c0 JG |
38 | #include <libxml/tree.h> |
39 | #include <lttng/lttng.h> | |
40 | #include <lttng/snapshot.h> | |
1501a7f3 JG |
41 | |
42 | #include "config.h" | |
36f2332b | 43 | #include "config-internal.h" |
1501a7f3 JG |
44 | |
45 | struct handler_filter_args { | |
46 | const char* section; | |
47 | config_entry_handler_cb handler; | |
48 | void *user_data; | |
49 | }; | |
50 | ||
dcf266c0 JG |
51 | struct session_config_validation_ctx { |
52 | xmlSchemaParserCtxtPtr parser_ctx; | |
53 | xmlSchemaPtr schema; | |
54 | xmlSchemaValidCtxtPtr schema_validation_ctx; | |
55 | }; | |
56 | ||
1501a7f3 JG |
57 | const char * const config_str_yes = "yes"; |
58 | const char * const config_str_true = "true"; | |
59 | const char * const config_str_on = "on"; | |
60 | const char * const config_str_no = "no"; | |
61 | const char * const config_str_false = "false"; | |
62 | const char * const config_str_off = "off"; | |
36f2332b | 63 | const char * const config_xml_encoding = "UTF-8"; |
fb198a11 | 64 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
36f2332b JG |
65 | const char * const config_xml_indent_string = "\t"; |
66 | const char * const config_xml_true = "true"; | |
67 | const char * const config_xml_false = "false"; | |
1501a7f3 | 68 | |
fb198a11 JG |
69 | const char * const config_element_channel = "channel"; |
70 | const char * const config_element_channels = "channels"; | |
71 | const char * const config_element_domain = "domain"; | |
72 | const char * const config_element_domains = "domains"; | |
73 | const char * const config_element_event = "event"; | |
74 | const char * const config_element_events = "events"; | |
75 | const char * const config_element_context = "context"; | |
76 | const char * const config_element_contexts = "contexts"; | |
77 | const char * const config_element_attributes = "attributes"; | |
78 | const char * const config_element_exclusion = "exclusion"; | |
79 | const char * const config_element_exclusions = "exclusions"; | |
80 | const char * const config_element_function_attributes = "function_attributes"; | |
81 | const char * const config_element_probe_attributes = "probe_attributes"; | |
82 | const char * const config_element_symbol_name = "symbol_name"; | |
83 | const char * const config_element_address = "address"; | |
84 | const char * const config_element_offset = "offset"; | |
85 | const char * const config_element_name = "name"; | |
86 | const char * const config_element_enabled = "enabled"; | |
87 | const char * const config_element_overwrite_mode = "overwrite_mode"; | |
88 | const char * const config_element_subbuf_size = "subbuffer_size"; | |
89 | const char * const config_element_num_subbuf = "subbuffer_count"; | |
90 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; | |
91 | const char * const config_element_read_timer_interval = "read_timer_interval"; | |
92 | const char * const config_element_output = "output"; | |
93 | const char * const config_element_output_type = "output_type"; | |
94 | const char * const config_element_tracefile_size = "tracefile_size"; | |
95 | const char * const config_element_tracefile_count = "tracefile_count"; | |
96 | const char * const config_element_live_timer_interval = "live_timer_interval"; | |
97 | const char * const config_element_type = "type"; | |
98 | const char * const config_element_buffer_type = "buffer_type"; | |
99 | const char * const config_element_session = "session"; | |
100 | const char * const config_element_sessions = "sessions"; | |
101 | const char * const config_element_perf = "perf"; | |
102 | const char * const config_element_config = "config"; | |
103 | const char * const config_element_started = "started"; | |
104 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
105 | const char * const config_element_loglevel = "loglevel"; | |
106 | const char * const config_element_loglevel_type = "loglevel_type"; | |
107 | const char * const config_element_filter = "filter"; | |
108 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; | |
109 | const char * const config_element_consumer_output = "consumer_output"; | |
110 | const char * const config_element_destination = "destination"; | |
111 | const char * const config_element_path = "path"; | |
112 | const char * const config_element_net_output = "net_output"; | |
113 | const char * const config_element_control_uri = "control_uri"; | |
114 | const char * const config_element_data_uri = "data_uri"; | |
115 | const char * const config_element_max_size = "max_size"; | |
116 | ||
117 | const char * const config_domain_type_kernel = "KERNEL"; | |
118 | const char * const config_domain_type_ust = "UST"; | |
119 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 120 | const char * const config_domain_type_log4j = "LOG4J"; |
fb198a11 JG |
121 | |
122 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
123 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
124 | const char * const config_buffer_type_global = "GLOBAL"; | |
125 | ||
126 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
127 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
128 | ||
129 | const char * const config_output_type_splice = "SPLICE"; | |
130 | const char * const config_output_type_mmap = "MMAP"; | |
131 | ||
132 | const char * const config_loglevel_type_all = "ALL"; | |
133 | const char * const config_loglevel_type_range = "RANGE"; | |
134 | const char * const config_loglevel_type_single = "SINGLE"; | |
135 | ||
136 | const char * const config_event_type_all = "ALL"; | |
137 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
138 | const char * const config_event_type_probe = "PROBE"; | |
139 | const char * const config_event_type_function = "FUNCTION"; | |
140 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
141 | const char * const config_event_type_noop = "NOOP"; | |
142 | const char * const config_event_type_syscall = "SYSCALL"; | |
143 | const char * const config_event_type_kprobe = "KPROBE"; | |
144 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
145 | ||
146 | const char * const config_event_context_pid = "PID"; | |
147 | const char * const config_event_context_procname = "PROCNAME"; | |
148 | const char * const config_event_context_prio = "PRIO"; | |
149 | const char * const config_event_context_nice = "NICE"; | |
150 | const char * const config_event_context_vpid = "VPID"; | |
151 | const char * const config_event_context_tid = "TID"; | |
152 | const char * const config_event_context_vtid = "VTID"; | |
153 | const char * const config_event_context_ppid = "PPID"; | |
154 | const char * const config_event_context_vppid = "VPPID"; | |
155 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
156 | const char * const config_event_context_hostname = "HOSTNAME"; | |
157 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 158 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
fb198a11 | 159 | |
dcf266c0 JG |
160 | struct consumer_output { |
161 | int enabled; | |
162 | char *path; | |
163 | char *control_uri; | |
164 | char *data_uri; | |
165 | }; | |
166 | ||
1501a7f3 JG |
167 | static int config_entry_handler_filter(struct handler_filter_args *args, |
168 | const char *section, const char *name, const char *value) | |
169 | { | |
170 | int ret = 0; | |
171 | struct config_entry entry = { section, name, value }; | |
172 | ||
173 | assert(args); | |
174 | ||
175 | if (!section || !name || !value) { | |
176 | ret = -EIO; | |
177 | goto end; | |
178 | } | |
179 | ||
180 | if (args->section) { | |
181 | if (strcmp(args->section, section)) { | |
182 | goto end; | |
183 | } | |
184 | } | |
185 | ||
186 | ret = args->handler(&entry, args->user_data); | |
187 | end: | |
188 | return ret; | |
189 | } | |
190 | ||
191 | LTTNG_HIDDEN | |
192 | int config_get_section_entries(const char *override_path, const char *section, | |
193 | config_entry_handler_cb handler, void *user_data) | |
194 | { | |
195 | int ret = 0; | |
7ab02a27 | 196 | char *path; |
1501a7f3 JG |
197 | FILE *config_file = NULL; |
198 | struct handler_filter_args filter = { section, handler, user_data }; | |
199 | ||
7ab02a27 DG |
200 | /* First, try system-wide conf. file. */ |
201 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
202 | ||
203 | config_file = fopen(path, "r"); | |
204 | if (config_file) { | |
205 | DBG("Loading daemon conf file at %s", path); | |
206 | /* | |
207 | * Return value is not very important here since error or not, we | |
208 | * continue and try the next possible conf. file. | |
209 | */ | |
210 | (void) ini_parse_file(config_file, | |
211 | (ini_entry_handler) config_entry_handler_filter, | |
212 | (void *) &filter); | |
213 | fclose(config_file); | |
214 | } | |
215 | ||
216 | /* Second is the user local configuration. */ | |
217 | path = utils_get_home_dir(); | |
218 | if (path) { | |
219 | char fullpath[PATH_MAX]; | |
220 | ||
221 | ret = snprintf(fullpath, sizeof(fullpath), | |
222 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
223 | if (ret < 0) { | |
224 | PERROR("snprintf user conf. path"); | |
225 | goto error; | |
226 | } | |
227 | ||
228 | config_file = fopen(fullpath, "r"); | |
229 | if (config_file) { | |
230 | DBG("Loading daemon user conf file at %s", path); | |
231 | /* | |
232 | * Return value is not very important here since error or not, we | |
233 | * continue and try the next possible conf. file. | |
234 | */ | |
235 | (void) ini_parse_file(config_file, | |
236 | (ini_entry_handler) config_entry_handler_filter, | |
237 | (void *) &filter); | |
238 | fclose(config_file); | |
239 | } | |
240 | } | |
241 | ||
242 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
243 | if (override_path) { |
244 | config_file = fopen(override_path, "r"); | |
245 | if (config_file) { | |
7ab02a27 DG |
246 | DBG("Loading daemon command line conf file at %s", override_path); |
247 | (void) ini_parse_file(config_file, | |
248 | (ini_entry_handler) config_entry_handler_filter, | |
249 | (void *) &filter); | |
250 | fclose(config_file); | |
1501a7f3 JG |
251 | } else { |
252 | ERR("Failed to open daemon configuration file at %s", | |
253 | override_path); | |
254 | ret = -ENOENT; | |
7ab02a27 | 255 | goto error; |
1501a7f3 JG |
256 | } |
257 | } | |
258 | ||
7ab02a27 DG |
259 | /* Everything went well. */ |
260 | ret = 0; | |
1501a7f3 | 261 | |
7ab02a27 | 262 | error: |
1501a7f3 JG |
263 | return ret; |
264 | } | |
265 | ||
266 | LTTNG_HIDDEN | |
267 | int config_parse_value(const char *value) | |
268 | { | |
269 | int i, ret = 0; | |
270 | char *endptr, *lower_str; | |
271 | size_t len; | |
272 | unsigned long v; | |
273 | ||
274 | len = strlen(value); | |
275 | if (!len) { | |
276 | ret = -1; | |
277 | goto end; | |
278 | } | |
279 | ||
280 | v = strtoul(value, &endptr, 10); | |
281 | if (endptr != value) { | |
282 | ret = v; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | lower_str = zmalloc(len + 1); | |
287 | if (!lower_str) { | |
288 | PERROR("zmalloc"); | |
289 | ret = -errno; | |
290 | goto end; | |
291 | } | |
292 | ||
293 | for (i = 0; i < len; i++) { | |
294 | lower_str[i] = tolower(value[i]); | |
295 | } | |
296 | ||
297 | if (!strcmp(lower_str, config_str_yes) || | |
298 | !strcmp(lower_str, config_str_true) || | |
299 | !strcmp(lower_str, config_str_on)) { | |
300 | ret = 1; | |
301 | } else if (!strcmp(lower_str, config_str_no) || | |
302 | !strcmp(lower_str, config_str_false) || | |
303 | !strcmp(lower_str, config_str_off)) { | |
304 | ret = 0; | |
305 | } else { | |
306 | ret = -1; | |
307 | } | |
308 | ||
309 | free(lower_str); | |
310 | end: | |
311 | return ret; | |
312 | } | |
36f2332b JG |
313 | |
314 | /* | |
315 | * Returns a xmlChar string which must be released using xmlFree(). | |
316 | */ | |
317 | static xmlChar *encode_string(const char *in_str) | |
318 | { | |
319 | xmlChar *out_str = NULL; | |
320 | xmlCharEncodingHandlerPtr handler; | |
321 | int out_len, ret, in_len; | |
322 | ||
323 | assert(in_str); | |
324 | ||
325 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
326 | if (!handler) { | |
327 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
328 | goto end; | |
329 | } | |
330 | ||
331 | in_len = strlen(in_str); | |
332 | /* | |
e0b9045b JG |
333 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
334 | * used because UTF-8 characters can take up to 4 bytes. | |
36f2332b | 335 | */ |
e0b9045b | 336 | out_len = (in_len * 4) + 1; |
36f2332b JG |
337 | out_str = xmlMalloc(out_len); |
338 | if (!out_str) { | |
339 | goto end; | |
340 | } | |
341 | ||
342 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
343 | if (ret < 0) { | |
344 | xmlFree(out_str); | |
345 | out_str = NULL; | |
346 | goto end; | |
347 | } | |
348 | ||
349 | /* out_len is now the size of out_str */ | |
350 | out_str[out_len] = '\0'; | |
351 | end: | |
352 | return out_str; | |
353 | } | |
354 | ||
355 | LTTNG_HIDDEN | |
705bb62f | 356 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
357 | { |
358 | int ret; | |
359 | struct config_writer *writer; | |
360 | xmlOutputBufferPtr buffer; | |
361 | ||
362 | writer = zmalloc(sizeof(struct config_writer)); | |
363 | if (!writer) { | |
364 | PERROR("zmalloc config_writer_create"); | |
365 | goto end; | |
366 | } | |
367 | ||
368 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
369 | if (!buffer) { | |
370 | goto error_destroy; | |
371 | } | |
372 | ||
373 | writer->writer = xmlNewTextWriter(buffer); | |
374 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
375 | config_xml_encoding, NULL); | |
376 | if (ret < 0) { | |
377 | goto error_destroy; | |
378 | } | |
379 | ||
380 | ret = xmlTextWriterSetIndentString(writer->writer, | |
381 | BAD_CAST config_xml_indent_string); | |
705bb62f | 382 | if (ret) { |
36f2332b JG |
383 | goto error_destroy; |
384 | } | |
385 | ||
705bb62f JRJ |
386 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
387 | if (ret) { | |
36f2332b JG |
388 | goto error_destroy; |
389 | } | |
390 | ||
391 | end: | |
392 | return writer; | |
393 | error_destroy: | |
394 | config_writer_destroy(writer); | |
395 | return NULL; | |
396 | } | |
397 | ||
398 | LTTNG_HIDDEN | |
399 | int config_writer_destroy(struct config_writer *writer) | |
400 | { | |
401 | int ret = 0; | |
402 | ||
403 | if (!writer) { | |
404 | ret = -EINVAL; | |
405 | goto end; | |
406 | } | |
407 | ||
408 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
409 | WARN("Could not close XML document"); | |
410 | ret = -EIO; | |
411 | } | |
412 | ||
413 | if (writer->writer) { | |
414 | xmlFreeTextWriter(writer->writer); | |
415 | } | |
416 | ||
417 | free(writer); | |
418 | end: | |
419 | return ret; | |
420 | } | |
421 | ||
422 | LTTNG_HIDDEN | |
423 | int config_writer_open_element(struct config_writer *writer, | |
424 | const char *element_name) | |
425 | { | |
426 | int ret; | |
427 | xmlChar *encoded_element_name; | |
428 | ||
429 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
430 | ret = -1; | |
431 | goto end; | |
432 | } | |
433 | ||
434 | encoded_element_name = encode_string(element_name); | |
435 | if (!encoded_element_name) { | |
436 | ret = -1; | |
437 | goto end; | |
438 | } | |
439 | ||
440 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
441 | xmlFree(encoded_element_name); | |
442 | end: | |
443 | return ret > 0 ? 0 : ret; | |
444 | } | |
445 | ||
446 | LTTNG_HIDDEN | |
447 | int config_writer_close_element(struct config_writer *writer) | |
448 | { | |
449 | int ret; | |
450 | ||
451 | if (!writer || !writer->writer) { | |
452 | ret = -1; | |
453 | goto end; | |
454 | } | |
455 | ||
456 | ret = xmlTextWriterEndElement(writer->writer); | |
457 | end: | |
458 | return ret > 0 ? 0 : ret; | |
459 | } | |
460 | ||
461 | LTTNG_HIDDEN | |
462 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
463 | const char *element_name, uint64_t value) | |
464 | { | |
465 | int ret; | |
466 | xmlChar *encoded_element_name; | |
467 | ||
468 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
469 | ret = -1; | |
470 | goto end; | |
471 | } | |
472 | ||
473 | encoded_element_name = encode_string(element_name); | |
474 | if (!encoded_element_name) { | |
475 | ret = -1; | |
476 | goto end; | |
477 | } | |
478 | ||
479 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
480 | encoded_element_name, "%" PRIu64, value); | |
481 | xmlFree(encoded_element_name); | |
482 | end: | |
483 | return ret > 0 ? 0 : ret; | |
484 | } | |
485 | ||
486 | LTTNG_HIDDEN | |
487 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
488 | const char *element_name, int64_t value) | |
489 | { | |
490 | int ret; | |
491 | xmlChar *encoded_element_name; | |
492 | ||
493 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
494 | ret = -1; | |
495 | goto end; | |
496 | } | |
497 | ||
498 | encoded_element_name = encode_string(element_name); | |
499 | if (!encoded_element_name) { | |
500 | ret = -1; | |
501 | goto end; | |
502 | } | |
503 | ||
504 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
505 | encoded_element_name, "%" PRIi64, value); | |
506 | xmlFree(encoded_element_name); | |
507 | end: | |
508 | return ret > 0 ? 0 : ret; | |
509 | } | |
510 | ||
511 | LTTNG_HIDDEN | |
512 | int config_writer_write_element_bool(struct config_writer *writer, | |
513 | const char *element_name, int value) | |
514 | { | |
515 | return config_writer_write_element_string(writer, element_name, | |
516 | value ? config_xml_true : config_xml_false); | |
517 | } | |
518 | ||
519 | LTTNG_HIDDEN | |
520 | int config_writer_write_element_string(struct config_writer *writer, | |
521 | const char *element_name, const char *value) | |
522 | { | |
523 | int ret; | |
524 | xmlChar *encoded_element_name = NULL; | |
525 | xmlChar *encoded_value = NULL; | |
526 | ||
527 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
528 | !value) { | |
529 | ret = -1; | |
530 | goto end; | |
531 | } | |
532 | ||
533 | encoded_element_name = encode_string(element_name); | |
534 | if (!encoded_element_name) { | |
535 | ret = -1; | |
536 | goto end; | |
537 | } | |
538 | ||
539 | encoded_value = encode_string(value); | |
540 | if (!encoded_value) { | |
541 | ret = -1; | |
542 | goto end; | |
543 | } | |
544 | ||
545 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 546 | encoded_value); |
36f2332b JG |
547 | end: |
548 | xmlFree(encoded_element_name); | |
549 | xmlFree(encoded_value); | |
550 | return ret > 0 ? 0 : ret; | |
551 | } | |
dcf266c0 JG |
552 | |
553 | static | |
554 | void xml_error_handler(void *ctx, const char *format, ...) | |
555 | { | |
556 | char *errMsg; | |
557 | va_list args; | |
558 | int ret; | |
559 | ||
560 | va_start(args, format); | |
561 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 562 | va_end(args); |
dcf266c0 JG |
563 | if (ret == -1) { |
564 | ERR("String allocation failed in xml error handler"); | |
565 | return; | |
566 | } | |
dcf266c0 JG |
567 | |
568 | fprintf(stderr, "XML Error: %s", errMsg); | |
569 | free(errMsg); | |
570 | } | |
571 | ||
572 | static | |
573 | void fini_session_config_validation_ctx( | |
574 | struct session_config_validation_ctx *ctx) | |
575 | { | |
576 | if (ctx->parser_ctx) { | |
577 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
578 | } | |
579 | ||
580 | if (ctx->schema) { | |
581 | xmlSchemaFree(ctx->schema); | |
582 | } | |
583 | ||
584 | if (ctx->schema_validation_ctx) { | |
585 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
586 | } | |
587 | ||
588 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
589 | } | |
590 | ||
54e399cb JG |
591 | static |
592 | char *get_session_config_xsd_path() | |
593 | { | |
594 | char *xsd_path; | |
595 | const char *base_path = getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); | |
596 | size_t base_path_len; | |
597 | size_t max_path_len; | |
598 | ||
599 | if (!base_path) { | |
600 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
601 | } | |
602 | ||
603 | base_path_len = strlen(base_path); | |
604 | max_path_len = base_path_len + | |
605 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
606 | xsd_path = zmalloc(max_path_len); | |
607 | if (!xsd_path) { | |
608 | goto end; | |
609 | } | |
610 | ||
611 | strncpy(xsd_path, base_path, max_path_len); | |
612 | if (xsd_path[base_path_len - 1] != '/') { | |
613 | xsd_path[base_path_len++] = '/'; | |
614 | } | |
615 | ||
616 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
617 | max_path_len - base_path_len); | |
618 | end: | |
619 | return xsd_path; | |
620 | } | |
621 | ||
dcf266c0 JG |
622 | static |
623 | int init_session_config_validation_ctx( | |
624 | struct session_config_validation_ctx *ctx) | |
625 | { | |
626 | int ret; | |
54e399cb JG |
627 | char *xsd_path = get_session_config_xsd_path(); |
628 | ||
629 | if (!xsd_path) { | |
630 | ret = -LTTNG_ERR_NOMEM; | |
631 | goto end; | |
632 | } | |
dcf266c0 | 633 | |
54e399cb | 634 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
635 | if (!ctx->parser_ctx) { |
636 | ERR("XSD parser context creation failed"); | |
637 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
638 | goto end; | |
639 | } | |
640 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
641 | xml_error_handler, NULL); | |
642 | ||
643 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
644 | if (!ctx->schema) { | |
645 | ERR("XSD parsing failed"); | |
646 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
647 | goto end; | |
648 | } | |
649 | ||
650 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
651 | if (!ctx->schema_validation_ctx) { | |
652 | ERR("XSD validation context creation failed"); | |
653 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
654 | goto end; | |
655 | } | |
656 | ||
657 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
658 | xml_error_handler, NULL); | |
659 | ret = 0; | |
660 | ||
661 | end: | |
662 | if (ret) { | |
663 | fini_session_config_validation_ctx(ctx); | |
664 | } | |
665 | ||
54e399cb | 666 | free(xsd_path); |
dcf266c0 JG |
667 | return ret; |
668 | } | |
669 | ||
670 | static | |
671 | int parse_uint(xmlChar *str, uint64_t *val) | |
672 | { | |
673 | int ret; | |
674 | char *endptr; | |
675 | ||
676 | if (!str || !val) { | |
677 | ret = -1; | |
678 | goto end; | |
679 | } | |
680 | ||
681 | *val = strtoull((const char *) str, &endptr, 10); | |
682 | if (!endptr || *endptr) { | |
683 | ret = -1; | |
684 | } else { | |
685 | ret = 0; | |
686 | } | |
687 | ||
688 | end: | |
689 | return ret; | |
690 | } | |
691 | ||
692 | static | |
693 | int parse_int(xmlChar *str, int64_t *val) | |
694 | { | |
695 | int ret; | |
696 | char *endptr; | |
697 | ||
698 | if (!str || !val) { | |
699 | ret = -1; | |
700 | goto end; | |
701 | } | |
702 | ||
703 | *val = strtoll((const char *) str, &endptr, 10); | |
704 | if (!endptr || *endptr) { | |
705 | ret = -1; | |
706 | } else { | |
707 | ret = 0; | |
708 | } | |
709 | ||
710 | end: | |
711 | return ret; | |
712 | } | |
713 | ||
714 | static | |
715 | int parse_bool(xmlChar *str, int *val) | |
716 | { | |
717 | int ret = 0; | |
718 | ||
719 | if (!str || !val) { | |
720 | ret = -1; | |
721 | goto end; | |
722 | } | |
723 | ||
724 | if (!strcmp((const char *) str, config_xml_true)) { | |
725 | *val = 1; | |
726 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
727 | *val = 0; | |
728 | } else { | |
729 | WARN("Invalid boolean value encoutered (%s).", | |
730 | (const char *) str); | |
731 | ret = -1; | |
732 | } | |
733 | end: | |
734 | return ret; | |
735 | } | |
736 | ||
737 | static | |
738 | int get_domain_type(xmlChar *domain) | |
739 | { | |
740 | int ret; | |
741 | ||
742 | if (!domain) { | |
743 | goto error; | |
744 | } | |
745 | ||
746 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
747 | ret = LTTNG_DOMAIN_KERNEL; | |
748 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
749 | ret = LTTNG_DOMAIN_UST; | |
750 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
751 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
752 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
753 | ret = LTTNG_DOMAIN_LOG4J; | |
dcf266c0 JG |
754 | } else { |
755 | goto error; | |
756 | } | |
757 | ||
758 | return ret; | |
759 | error: | |
760 | return -1; | |
761 | } | |
762 | ||
763 | static | |
764 | int get_buffer_type(xmlChar *buffer_type) | |
765 | { | |
766 | int ret; | |
767 | ||
768 | if (!buffer_type) { | |
769 | goto error; | |
770 | } | |
771 | ||
772 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
773 | ret = LTTNG_BUFFER_GLOBAL; | |
774 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
775 | ret = LTTNG_BUFFER_PER_UID; | |
776 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
777 | ret = LTTNG_BUFFER_PER_PID; | |
778 | } else { | |
779 | goto error; | |
780 | } | |
781 | ||
782 | return ret; | |
783 | error: | |
784 | return -1; | |
785 | } | |
786 | ||
787 | static | |
788 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
789 | { | |
790 | int ret; | |
791 | ||
792 | if (!overwrite_mode) { | |
793 | goto error; | |
794 | } | |
795 | ||
796 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
797 | ret = 1; | |
798 | } else if (!strcmp((char *) overwrite_mode, | |
799 | config_overwrite_mode_discard)) { | |
800 | ret = 0; | |
801 | } else { | |
802 | goto error; | |
803 | } | |
804 | ||
805 | return ret; | |
806 | error: | |
807 | return -1; | |
808 | } | |
809 | ||
810 | static | |
811 | int get_output_type(xmlChar *output_type) | |
812 | { | |
813 | int ret; | |
814 | ||
815 | if (!output_type) { | |
816 | goto error; | |
817 | } | |
818 | ||
819 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
820 | ret = LTTNG_EVENT_MMAP; | |
821 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
822 | ret = LTTNG_EVENT_SPLICE; | |
823 | } else { | |
824 | goto error; | |
825 | } | |
826 | ||
827 | return ret; | |
828 | error: | |
829 | return -1; | |
830 | } | |
831 | ||
832 | static | |
833 | int get_event_type(xmlChar *event_type) | |
834 | { | |
835 | int ret; | |
836 | ||
837 | if (!event_type) { | |
838 | goto error; | |
839 | } | |
840 | ||
841 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
842 | ret = LTTNG_EVENT_ALL; | |
843 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
844 | ret = LTTNG_EVENT_TRACEPOINT; | |
845 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
846 | ret = LTTNG_EVENT_PROBE; | |
847 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
848 | ret = LTTNG_EVENT_FUNCTION; | |
849 | } else if (!strcmp((char *) event_type, | |
850 | config_event_type_function_entry)) { | |
851 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
852 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
853 | ret = LTTNG_EVENT_NOOP; | |
854 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
855 | ret = LTTNG_EVENT_SYSCALL; | |
856 | } else { | |
857 | goto error; | |
858 | } | |
859 | ||
860 | return ret; | |
861 | error: | |
862 | return -1; | |
863 | } | |
864 | ||
865 | static | |
866 | int get_loglevel_type(xmlChar *loglevel_type) | |
867 | { | |
868 | int ret; | |
869 | ||
870 | if (!loglevel_type) { | |
871 | goto error; | |
872 | } | |
873 | ||
874 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
875 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
876 | } else if (!strcmp((char *) loglevel_type, | |
877 | config_loglevel_type_range)) { | |
878 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
879 | } else if (!strcmp((char *) loglevel_type, | |
880 | config_loglevel_type_single)) { | |
881 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
882 | } else { | |
883 | goto error; | |
884 | } | |
885 | ||
886 | return ret; | |
887 | error: | |
888 | return -1; | |
889 | } | |
890 | ||
891 | /* | |
892 | * Return the context type or -1 on error. | |
893 | */ | |
894 | static | |
895 | int get_context_type(xmlChar *context_type) | |
896 | { | |
897 | int ret; | |
898 | ||
899 | if (!context_type) { | |
900 | goto error; | |
901 | } | |
902 | ||
903 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
904 | ret = LTTNG_EVENT_CONTEXT_PID; | |
905 | } else if (!strcmp((char *) context_type, | |
906 | config_event_context_procname)) { | |
907 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
908 | } else if (!strcmp((char *) context_type, | |
909 | config_event_context_prio)) { | |
910 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
911 | } else if (!strcmp((char *) context_type, | |
912 | config_event_context_nice)) { | |
913 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
914 | } else if (!strcmp((char *) context_type, | |
915 | config_event_context_vpid)) { | |
916 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
917 | } else if (!strcmp((char *) context_type, | |
918 | config_event_context_tid)) { | |
919 | ret = LTTNG_EVENT_CONTEXT_TID; | |
920 | } else if (!strcmp((char *) context_type, | |
921 | config_event_context_vtid)) { | |
922 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
923 | } else if (!strcmp((char *) context_type, | |
924 | config_event_context_ppid)) { | |
925 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
926 | } else if (!strcmp((char *) context_type, | |
927 | config_event_context_vppid)) { | |
928 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
929 | } else if (!strcmp((char *) context_type, | |
930 | config_event_context_pthread_id)) { | |
931 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
932 | } else if (!strcmp((char *) context_type, | |
933 | config_event_context_hostname)) { | |
934 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
935 | } else if (!strcmp((char *) context_type, | |
936 | config_event_context_ip)) { | |
937 | ret = LTTNG_EVENT_CONTEXT_IP; | |
938 | } else { | |
939 | goto error; | |
940 | } | |
941 | ||
942 | return ret; | |
943 | error: | |
944 | return -1; | |
945 | } | |
946 | ||
947 | static | |
948 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
949 | { | |
950 | int ret; | |
951 | xmlNodePtr node; | |
952 | ||
953 | for (node = xmlFirstElementChild(domain_node); node; | |
954 | node = xmlNextElementSibling(node)) { | |
955 | if (!strcmp((const char *) node->name, config_element_type)) { | |
956 | /* domain type */ | |
957 | xmlChar *node_content = xmlNodeGetContent(node); | |
958 | if (!node_content) { | |
959 | ret = -LTTNG_ERR_NOMEM; | |
960 | goto end; | |
961 | } | |
962 | ||
963 | ret = get_domain_type(node_content); | |
964 | free(node_content); | |
965 | if (ret < 0) { | |
966 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
967 | goto end; | |
968 | } | |
969 | ||
970 | domain->type = ret; | |
971 | } else if (!strcmp((const char *) node->name, | |
972 | config_element_buffer_type)) { | |
973 | /* buffer type */ | |
974 | xmlChar *node_content = xmlNodeGetContent(node); | |
975 | if (!node_content) { | |
976 | ret = -LTTNG_ERR_NOMEM; | |
977 | goto end; | |
978 | } | |
979 | ||
980 | ret = get_buffer_type(node_content); | |
981 | free(node_content); | |
982 | if (ret < 0) { | |
983 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
984 | goto end; | |
985 | } | |
986 | ||
987 | domain->buf_type = ret; | |
988 | } | |
989 | } | |
990 | ret = 0; | |
991 | end: | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static | |
996 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
997 | char **data_uri) | |
998 | { | |
999 | xmlNodePtr node; | |
1000 | ||
1001 | for (node = xmlFirstElementChild(net_output_node); node; | |
1002 | node = xmlNextElementSibling(node)) { | |
1003 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1004 | /* control_uri */ | |
1005 | *control_uri = (char *) xmlNodeGetContent(node); | |
1006 | if (!*control_uri) { | |
1007 | break; | |
1008 | } | |
1009 | } else { | |
1010 | /* data_uri */ | |
1011 | *data_uri = (char *) xmlNodeGetContent(node); | |
1012 | if (!*data_uri) { | |
1013 | break; | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1019 | } | |
1020 | ||
1021 | static | |
1022 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1023 | struct consumer_output *output) | |
1024 | { | |
1025 | int ret; | |
1026 | xmlNodePtr node; | |
1027 | ||
1028 | assert(output); | |
1029 | ||
1030 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1031 | node = xmlNextElementSibling(node)) { | |
1032 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1033 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1034 | ||
1035 | /* enabled */ | |
1036 | if (!enabled_str) { | |
1037 | ret = -LTTNG_ERR_NOMEM; | |
1038 | goto end; | |
1039 | } | |
1040 | ||
1041 | ret = parse_bool(enabled_str, &output->enabled); | |
1042 | free(enabled_str); | |
1043 | if (ret) { | |
1044 | goto end; | |
1045 | } | |
1046 | } else { | |
1047 | xmlNodePtr output_type_node; | |
1048 | ||
1049 | /* destination */ | |
1050 | output_type_node = xmlFirstElementChild(node); | |
1051 | if (!output_type_node) { | |
1052 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1053 | goto end; | |
1054 | } | |
1055 | ||
1056 | if (!strcmp((const char *) output_type_node->name, | |
1057 | config_element_path)) { | |
1058 | /* path */ | |
1059 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1060 | if (!output->path) { | |
1061 | ret = -LTTNG_ERR_NOMEM; | |
1062 | goto end; | |
1063 | } | |
1064 | } else { | |
1065 | /* net_output */ | |
1066 | ret = get_net_output_uris(output_type_node, | |
1067 | &output->control_uri, &output->data_uri); | |
1068 | if (ret) { | |
1069 | goto end; | |
1070 | } | |
1071 | } | |
1072 | } | |
1073 | } | |
1074 | ret = 0; | |
1075 | ||
1076 | end: | |
1077 | if (ret) { | |
1078 | free(output->path); | |
1079 | free(output->control_uri); | |
1080 | free(output->data_uri); | |
1081 | memset(output, 0, sizeof(struct consumer_output)); | |
1082 | } | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | static | |
1087 | int create_session_net_output(const char *name, struct lttng_domain *domain, | |
1088 | const char *control_uri, const char *data_uri) | |
1089 | { | |
1090 | int ret; | |
1091 | struct lttng_handle *handle; | |
1092 | const char *uri = NULL; | |
1093 | ||
1094 | assert(name); | |
1095 | assert(domain); | |
1096 | ||
1097 | handle = lttng_create_handle(name, domain); | |
1098 | if (!handle) { | |
1099 | ret = -LTTNG_ERR_NOMEM; | |
1100 | goto end; | |
1101 | } | |
1102 | ||
1103 | if (!control_uri || !data_uri) { | |
1104 | uri = control_uri ? control_uri : data_uri; | |
1105 | control_uri = uri; | |
1106 | data_uri = uri; | |
1107 | } | |
1108 | ||
1109 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1110 | lttng_destroy_handle(handle); | |
1111 | end: | |
1112 | return ret; | |
1113 | } | |
1114 | ||
1115 | static | |
1116 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node) | |
1117 | { | |
1118 | int ret; | |
1119 | xmlNodePtr node = NULL; | |
1120 | xmlNodePtr snapshot_output_list_node; | |
1121 | xmlNodePtr snapshot_output_node; | |
1122 | ||
1123 | assert(session_name); | |
1124 | ||
1125 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1126 | if (ret) { | |
1127 | goto end; | |
1128 | } | |
1129 | ||
1130 | if (!output_node) { | |
1131 | goto end; | |
1132 | } | |
1133 | ||
1134 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1135 | ||
1136 | /* Parse and create snapshot outputs */ | |
1137 | ||
1138 | for (snapshot_output_node = | |
1139 | xmlFirstElementChild(snapshot_output_list_node); | |
1140 | snapshot_output_node; snapshot_output_node = | |
1141 | xmlNextElementSibling(snapshot_output_node)) { | |
1142 | char *name = NULL; | |
1143 | uint64_t max_size = UINT64_MAX; | |
1144 | struct consumer_output output = { 0 }; | |
1145 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1146 | ||
1147 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1148 | node = xmlNextElementSibling(node)) { | |
1149 | if (!strcmp((const char *) node->name, | |
1150 | config_element_name)) { | |
1151 | /* name */ | |
1152 | name = (char *) xmlNodeGetContent(node); | |
1153 | if (!name) { | |
1154 | ret = -LTTNG_ERR_NOMEM; | |
1155 | goto error_snapshot_output; | |
1156 | } | |
1157 | } else if (!strcmp((const char *) node->name, | |
1158 | config_element_max_size)) { | |
1159 | xmlChar *content = xmlNodeGetContent(node); | |
1160 | ||
1161 | /* max_size */ | |
1162 | if (!content) { | |
1163 | ret = -LTTNG_ERR_NOMEM; | |
1164 | goto error_snapshot_output; | |
1165 | } | |
1166 | ret = parse_uint(content, &max_size); | |
1167 | free(content); | |
1168 | if (ret) { | |
1169 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1170 | goto error_snapshot_output; | |
1171 | } | |
1172 | } else { | |
1173 | /* consumer_output */ | |
1174 | ret = process_consumer_output(node, &output); | |
1175 | if (ret) { | |
1176 | goto error_snapshot_output; | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | snapshot_output = lttng_snapshot_output_create(); | |
1182 | if (!snapshot_output) { | |
1183 | ret = -LTTNG_ERR_NOMEM; | |
1184 | goto error_snapshot_output; | |
1185 | } | |
1186 | ||
1187 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1188 | if (ret) { | |
1189 | goto error_snapshot_output; | |
1190 | } | |
1191 | ||
1192 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1193 | if (ret) { | |
1194 | goto error_snapshot_output; | |
1195 | } | |
1196 | ||
1197 | if (output.path) { | |
1198 | ret = lttng_snapshot_output_set_ctrl_url(output.path, | |
1199 | snapshot_output); | |
1200 | if (ret) { | |
1201 | goto error_snapshot_output; | |
1202 | } | |
1203 | } else { | |
1204 | if (output.control_uri) { | |
1205 | ret = lttng_snapshot_output_set_ctrl_url(output.control_uri, | |
1206 | snapshot_output); | |
1207 | if (ret) { | |
1208 | goto error_snapshot_output; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | if (output.data_uri) { | |
1213 | ret = lttng_snapshot_output_set_data_url(output.data_uri, | |
1214 | snapshot_output); | |
1215 | if (ret) { | |
1216 | goto error_snapshot_output; | |
1217 | } | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1222 | error_snapshot_output: | |
1223 | free(name); | |
1224 | free(output.path); | |
1225 | free(output.control_uri); | |
1226 | free(output.data_uri); | |
1227 | lttng_snapshot_output_destroy(snapshot_output); | |
1228 | if (ret) { | |
1229 | goto end; | |
1230 | } | |
1231 | } | |
1232 | end: | |
1233 | return ret; | |
1234 | } | |
1235 | ||
1236 | static | |
1237 | int create_session(const char *name, | |
1238 | struct lttng_domain *kernel_domain, | |
1239 | struct lttng_domain *ust_domain, | |
1240 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1241 | struct lttng_domain *log4j_domain, |
dcf266c0 JG |
1242 | xmlNodePtr output_node, |
1243 | uint64_t live_timer_interval) | |
1244 | { | |
1245 | int ret; | |
1246 | struct consumer_output output = { 0 }; | |
1247 | xmlNodePtr consumer_output_node; | |
1248 | ||
1249 | assert(name); | |
dcf266c0 JG |
1250 | |
1251 | if (output_node) { | |
1252 | consumer_output_node = xmlFirstElementChild(output_node); | |
1253 | if (!consumer_output_node) { | |
1254 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1255 | goto end; | |
1256 | } | |
1257 | ||
1258 | if (strcmp((const char *) consumer_output_node->name, | |
1259 | config_element_consumer_output)) { | |
1260 | WARN("Invalid output type, expected %s node", | |
1261 | config_element_consumer_output); | |
1262 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1263 | goto end; | |
1264 | } | |
1265 | ||
1266 | ret = process_consumer_output(consumer_output_node, &output); | |
1267 | if (ret) { | |
1268 | goto end; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | if (live_timer_interval != UINT64_MAX && | |
1273 | !output.control_uri && !output.data_uri) { | |
1274 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1275 | goto end; | |
1276 | } | |
1277 | ||
1278 | if (output.control_uri || output.data_uri) { | |
1279 | int i; | |
1280 | struct lttng_domain *domain; | |
1281 | struct lttng_domain *domains[] = | |
5cdb6027 | 1282 | { kernel_domain, ust_domain, jul_domain, log4j_domain}; |
dcf266c0 JG |
1283 | |
1284 | /* network destination */ | |
1285 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1286 | /* |
1287 | * URLs are provided for sure since the test above make sure that | |
1288 | * with a live timer the data and control URIs are provided. So, | |
1289 | * NULL is passed here and will be set right after. | |
1290 | */ | |
1291 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1292 | } else { |
1293 | ret = lttng_create_session(name, NULL); | |
1294 | } | |
1295 | if (ret) { | |
1296 | goto end; | |
1297 | } | |
1298 | ||
301423df | 1299 | for (i = 0; i < (sizeof(domains) / sizeof(domains[0])); i++) { |
dcf266c0 JG |
1300 | domain = domains[i]; |
1301 | if (!domain) { | |
1302 | continue; | |
1303 | } | |
1304 | ||
1305 | ret = create_session_net_output(name, domain, output.control_uri, | |
1306 | output.data_uri); | |
1307 | if (ret) { | |
1308 | goto end; | |
1309 | } | |
1310 | } | |
1311 | } else { | |
1312 | /* either local output or no output */ | |
1313 | ret = lttng_create_session(name, output.path); | |
1314 | if (ret) { | |
1315 | goto end; | |
1316 | } | |
1317 | } | |
1318 | end: | |
1319 | free(output.path); | |
1320 | free(output.control_uri); | |
1321 | free(output.data_uri); | |
1322 | return ret; | |
1323 | } | |
1324 | static | |
1325 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1326 | struct lttng_event_probe_attr *attr) | |
1327 | { | |
1328 | int ret; | |
1329 | ||
1330 | assert(probe_attribute_node); | |
1331 | assert(attr); | |
1332 | ||
1333 | if (!strcmp((const char *) probe_attribute_node->name, | |
1334 | config_element_address)) { | |
1335 | xmlChar *content; | |
1336 | uint64_t addr = 0; | |
1337 | ||
1338 | /* addr */ | |
1339 | content = xmlNodeGetContent(probe_attribute_node); | |
1340 | if (!content) { | |
1341 | ret = -LTTNG_ERR_NOMEM; | |
1342 | goto end; | |
1343 | } | |
1344 | ||
1345 | ret = parse_uint(content, &addr); | |
1346 | free(content); | |
1347 | if (ret) { | |
1348 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1349 | goto end; | |
1350 | } | |
1351 | ||
1352 | attr->addr = addr; | |
1353 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1354 | config_element_offset)) { | |
1355 | xmlChar *content; | |
1356 | uint64_t offset = 0; | |
1357 | ||
1358 | /* offset */ | |
1359 | content = xmlNodeGetContent(probe_attribute_node); | |
1360 | if (!content) { | |
1361 | ret = -LTTNG_ERR_NOMEM; | |
1362 | goto end; | |
1363 | } | |
1364 | ||
1365 | ret = parse_uint(content, &offset); | |
1366 | free(content); | |
1367 | if (ret) { | |
1368 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1369 | goto end; | |
1370 | } | |
1371 | ||
1372 | attr->offset = offset; | |
1373 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1374 | config_element_symbol_name)) { | |
1375 | xmlChar *content; | |
1376 | size_t name_len; | |
1377 | ||
1378 | /* symbol_name */ | |
1379 | content = xmlNodeGetContent(probe_attribute_node); | |
1380 | if (!content) { | |
1381 | ret = -LTTNG_ERR_NOMEM; | |
1382 | goto end; | |
1383 | } | |
1384 | ||
1385 | name_len = strlen((char *) content); | |
1386 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1387 | WARN("symbol_name too long."); | |
1388 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1389 | free(content); | |
1390 | goto end; | |
1391 | } | |
1392 | ||
1393 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1394 | free(content); | |
1395 | } | |
1396 | ret = 0; | |
1397 | end: | |
1398 | return ret; | |
1399 | } | |
1400 | ||
1401 | static | |
1402 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
1403 | const char *channel_name) | |
1404 | { | |
1405 | int ret, i; | |
1406 | xmlNodePtr node; | |
1407 | struct lttng_event event; | |
1408 | char **exclusions = NULL; | |
1409 | unsigned long exclusion_count = 0; | |
1410 | char *filter_expression = NULL; | |
1411 | ||
1412 | assert(event_node); | |
1413 | assert(handle); | |
1414 | assert(channel_name); | |
1415 | ||
1416 | memset(&event, 0, sizeof(event)); | |
1417 | ||
278b6f12 JG |
1418 | /* Initialize default log level which varies by domain */ |
1419 | switch (handle->domain.type) | |
1420 | { | |
1421 | case LTTNG_DOMAIN_JUL: | |
1422 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; | |
1423 | break; | |
1424 | case LTTNG_DOMAIN_LOG4J: | |
1425 | event.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; | |
1426 | break; | |
1427 | case LTTNG_DOMAIN_UST: | |
1428 | case LTTNG_DOMAIN_KERNEL: | |
1429 | event.loglevel = LTTNG_LOGLEVEL_DEBUG; | |
1430 | break; | |
1431 | default: | |
1432 | assert(0); | |
1433 | } | |
1434 | ||
dcf266c0 JG |
1435 | for (node = xmlFirstElementChild(event_node); node; |
1436 | node = xmlNextElementSibling(node)) { | |
1437 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1438 | xmlChar *content; | |
1439 | size_t name_len; | |
1440 | ||
1441 | /* name */ | |
1442 | content = xmlNodeGetContent(node); | |
1443 | if (!content) { | |
1444 | ret = -LTTNG_ERR_NOMEM; | |
1445 | goto end; | |
1446 | } | |
1447 | ||
1448 | name_len = strlen((char *) content); | |
1449 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1450 | WARN("Channel name too long."); | |
1451 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1452 | free(content); | |
1453 | goto end; | |
1454 | } | |
1455 | ||
1456 | strncpy(event.name, (const char *) content, name_len); | |
1457 | free(content); | |
1458 | } else if (!strcmp((const char *) node->name, | |
1459 | config_element_enabled)) { | |
1460 | xmlChar *content = xmlNodeGetContent(node); | |
1461 | ||
1462 | /* enabled */ | |
1463 | if (!content) { | |
1464 | ret = -LTTNG_ERR_NOMEM; | |
1465 | goto end; | |
1466 | } | |
1467 | ||
1468 | ret = parse_bool(content, &event.enabled); | |
1469 | free(content); | |
1470 | if (ret) { | |
1471 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1472 | goto end; | |
1473 | } | |
1474 | } else if (!strcmp((const char *) node->name, | |
1475 | config_element_type)) { | |
1476 | xmlChar *content = xmlNodeGetContent(node); | |
1477 | ||
1478 | /* type */ | |
1479 | if (!content) { | |
1480 | ret = -LTTNG_ERR_NOMEM; | |
1481 | goto end; | |
1482 | } | |
1483 | ||
1484 | ret = get_event_type(content); | |
1485 | free(content); | |
1486 | if (ret < 0) { | |
1487 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1488 | goto end; | |
1489 | } | |
1490 | ||
1491 | event.type = ret; | |
1492 | } else if (!strcmp((const char *) node->name, | |
1493 | config_element_loglevel_type)) { | |
1494 | xmlChar *content = xmlNodeGetContent(node); | |
1495 | ||
1496 | /* loglevel_type */ | |
1497 | if (!content) { | |
1498 | ret = -LTTNG_ERR_NOMEM; | |
1499 | goto end; | |
1500 | } | |
1501 | ||
1502 | ret = get_loglevel_type(content); | |
1503 | free(content); | |
1504 | if (ret < 0) { | |
1505 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1506 | goto end; | |
1507 | } | |
1508 | ||
1509 | event.loglevel_type = ret; | |
1510 | } else if (!strcmp((const char *) node->name, | |
1511 | config_element_loglevel)) { | |
1512 | xmlChar *content; | |
1513 | int64_t loglevel = 0; | |
1514 | ||
1515 | /* loglevel */ | |
1516 | content = xmlNodeGetContent(node); | |
1517 | if (!content) { | |
1518 | ret = -LTTNG_ERR_NOMEM; | |
1519 | goto end; | |
1520 | } | |
1521 | ||
1522 | ret = parse_int(content, &loglevel); | |
1523 | free(content); | |
1524 | if (ret) { | |
1525 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1526 | goto end; | |
1527 | } | |
1528 | ||
1529 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1530 | WARN("loglevel out of range."); | |
1531 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1532 | goto end; | |
1533 | } | |
1534 | ||
1535 | event.loglevel = loglevel; | |
1536 | } else if (!strcmp((const char *) node->name, | |
1537 | config_element_filter)) { | |
1538 | xmlChar *content = | |
1539 | xmlNodeGetContent(node); | |
1540 | ||
1541 | /* filter */ | |
1542 | if (!content) { | |
1543 | ret = -LTTNG_ERR_NOMEM; | |
1544 | goto end; | |
1545 | } | |
1546 | ||
1547 | filter_expression = strdup((char *) content); | |
1548 | free(content); | |
1549 | if (!filter_expression) { | |
1550 | ret = -LTTNG_ERR_NOMEM; | |
1551 | goto end; | |
1552 | } | |
1553 | } else if (!strcmp((const char *) node->name, | |
1554 | config_element_exclusions)) { | |
1555 | xmlNodePtr exclusion_node; | |
1556 | int exclusion_index = 0; | |
1557 | ||
1558 | /* exclusions */ | |
1559 | if (exclusions) { | |
1560 | /* | |
1561 | * Exclusions has already been initialized, | |
1562 | * invalid file. | |
1563 | */ | |
1564 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1565 | goto end; | |
1566 | } | |
1567 | ||
1568 | exclusion_count = xmlChildElementCount(node); | |
1569 | if (!exclusion_count) { | |
1570 | continue; | |
1571 | } | |
1572 | ||
1573 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1574 | if (!exclusions) { | |
1575 | exclusion_count = 0; | |
1576 | ret = -LTTNG_ERR_NOMEM; | |
1577 | goto end; | |
1578 | } | |
1579 | ||
1580 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1581 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1582 | xmlChar *content = | |
1583 | xmlNodeGetContent(exclusion_node); | |
1584 | ||
1585 | if (!content) { | |
1586 | ret = -LTTNG_ERR_NOMEM; | |
1587 | goto end; | |
1588 | } | |
1589 | ||
1590 | exclusions[exclusion_index] = strdup((const char *) content); | |
1591 | free(content); | |
1592 | if (!exclusions[exclusion_index]) { | |
1593 | ret = -LTTNG_ERR_NOMEM; | |
1594 | goto end; | |
1595 | } | |
1596 | exclusion_index++; | |
1597 | } | |
1598 | ||
1599 | event.exclusion = 1; | |
1600 | } else if (!strcmp((const char *) node->name, | |
1601 | config_element_attributes)) { | |
1602 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1603 | ||
1604 | /* attributes */ | |
1605 | if (!attribute_node) { | |
1606 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1607 | goto end; | |
1608 | } | |
1609 | ||
1610 | if (!strcmp((const char *) node->name, | |
1611 | config_element_probe_attributes)) { | |
1612 | xmlNodePtr probe_attribute_node; | |
1613 | ||
1614 | /* probe_attributes */ | |
1615 | for (probe_attribute_node = | |
1616 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1617 | probe_attribute_node = xmlNextElementSibling( | |
1618 | probe_attribute_node)) { | |
1619 | ||
1620 | ret = process_probe_attribute_node(probe_attribute_node, | |
1621 | &event.attr.probe); | |
1622 | if (ret) { | |
1623 | goto end; | |
1624 | } | |
1625 | } | |
1626 | } else { | |
1627 | size_t sym_len; | |
1628 | xmlChar *content; | |
1629 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1630 | ||
1631 | /* function_attributes */ | |
1632 | content = xmlNodeGetContent(symbol_node); | |
1633 | if (!content) { | |
1634 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1635 | goto end; | |
1636 | } | |
1637 | ||
1638 | sym_len = strlen((char *) content); | |
1639 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1640 | WARN("Function name too long."); | |
1641 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1642 | free(content); | |
1643 | goto end; | |
1644 | } | |
1645 | ||
1646 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1647 | sym_len); | |
1648 | free(content); | |
1649 | } | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1654 | filter_expression, exclusion_count, exclusions); | |
3278da59 JG |
1655 | if (ret) { |
1656 | goto end; | |
1657 | } | |
1658 | ||
1659 | if (!event.enabled) { | |
1660 | /* | |
1661 | * Note that we should use lttng_disable_event_ext() (2.6+) to | |
1662 | * eliminate the risk of clashing on events of the same | |
1663 | * name (with different event types and loglevels). | |
1664 | * | |
1665 | * Unfortunately, lttng_disable_event_ext() only performs a | |
1666 | * match on the name and event type and errors out if any other | |
1667 | * event attribute is not set to its default value. | |
1668 | * | |
1669 | * This will disable all events that match this name. | |
1670 | */ | |
1671 | ret = lttng_disable_event(handle, event.name, channel_name); | |
1672 | } | |
dcf266c0 JG |
1673 | end: |
1674 | for (i = 0; i < exclusion_count; i++) { | |
1675 | free(exclusions[i]); | |
1676 | } | |
1677 | ||
1678 | free(exclusions); | |
1679 | free(filter_expression); | |
1680 | return ret; | |
1681 | } | |
1682 | ||
1683 | static | |
1684 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1685 | const char *channel_name) | |
1686 | { | |
1687 | int ret = 0; | |
1688 | xmlNodePtr node; | |
1689 | ||
1690 | assert(events_node); | |
1691 | assert(handle); | |
1692 | assert(channel_name); | |
1693 | ||
1694 | for (node = xmlFirstElementChild(events_node); node; | |
1695 | node = xmlNextElementSibling(node)) { | |
1696 | ret = process_event_node(node, handle, channel_name); | |
1697 | if (ret) { | |
1698 | goto end; | |
1699 | } | |
1700 | } | |
1701 | end: | |
1702 | return ret; | |
1703 | } | |
1704 | ||
1705 | static | |
1706 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1707 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1708 | xmlNodePtr *events_node) | |
1709 | { | |
1710 | int ret; | |
1711 | ||
1712 | assert(attr_node); | |
1713 | assert(channel); | |
1714 | assert(contexts_node); | |
1715 | assert(events_node); | |
1716 | ||
1717 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1718 | xmlChar *content; | |
1719 | size_t name_len; | |
1720 | ||
1721 | /* name */ | |
1722 | content = xmlNodeGetContent(attr_node); | |
1723 | if (!content) { | |
1724 | ret = -LTTNG_ERR_NOMEM; | |
1725 | goto end; | |
1726 | } | |
1727 | ||
1728 | name_len = strlen((char *) content); | |
1729 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1730 | WARN("Channel name too long."); | |
1731 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1732 | free(content); | |
1733 | goto end; | |
1734 | } | |
1735 | ||
1736 | strncpy(channel->name, (const char *) content, name_len); | |
1737 | free(content); | |
1738 | } else if (!strcmp((const char *) attr_node->name, | |
1739 | config_element_enabled)) { | |
1740 | xmlChar *content; | |
1741 | int enabled; | |
1742 | ||
1743 | /* enabled */ | |
1744 | content = xmlNodeGetContent(attr_node); | |
1745 | if (!content) { | |
1746 | ret = -LTTNG_ERR_NOMEM; | |
1747 | goto end; | |
1748 | } | |
1749 | ||
1750 | ret = parse_bool(content, &enabled); | |
1751 | free(content); | |
1752 | if (ret) { | |
1753 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1754 | goto end; | |
1755 | } | |
1756 | ||
1757 | channel->enabled = enabled; | |
1758 | } else if (!strcmp((const char *) attr_node->name, | |
1759 | config_element_overwrite_mode)) { | |
1760 | xmlChar *content; | |
1761 | ||
1762 | /* overwrite_mode */ | |
1763 | content = xmlNodeGetContent(attr_node); | |
1764 | if (!content) { | |
1765 | ret = -LTTNG_ERR_NOMEM; | |
1766 | goto end; | |
1767 | } | |
1768 | ||
1769 | ret = get_overwrite_mode(content); | |
1770 | free(content); | |
1771 | if (ret < 0) { | |
1772 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1773 | goto end; | |
1774 | } | |
1775 | ||
1776 | channel->attr.overwrite = ret; | |
1777 | } else if (!strcmp((const char *) attr_node->name, | |
1778 | config_element_subbuf_size)) { | |
1779 | xmlChar *content; | |
1780 | ||
1781 | /* subbuffer_size */ | |
1782 | content = xmlNodeGetContent(attr_node); | |
1783 | if (!content) { | |
1784 | ret = -LTTNG_ERR_NOMEM; | |
1785 | goto end; | |
1786 | } | |
1787 | ||
1788 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1789 | free(content); | |
1790 | if (ret) { | |
1791 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1792 | goto end; | |
1793 | } | |
1794 | } else if (!strcmp((const char *) attr_node->name, | |
1795 | config_element_num_subbuf)) { | |
1796 | xmlChar *content; | |
1797 | ||
1798 | /* subbuffer_count */ | |
1799 | content = xmlNodeGetContent(attr_node); | |
1800 | if (!content) { | |
1801 | ret = -LTTNG_ERR_NOMEM; | |
1802 | goto end; | |
1803 | } | |
1804 | ||
1805 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1806 | free(content); | |
1807 | if (ret) { | |
1808 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1809 | goto end; | |
1810 | } | |
1811 | } else if (!strcmp((const char *) attr_node->name, | |
1812 | config_element_switch_timer_interval)) { | |
1813 | xmlChar *content; | |
1814 | uint64_t switch_timer_interval = 0; | |
1815 | ||
1816 | /* switch_timer_interval */ | |
1817 | content = xmlNodeGetContent(attr_node); | |
1818 | if (!content) { | |
1819 | ret = -LTTNG_ERR_NOMEM; | |
1820 | goto end; | |
1821 | } | |
1822 | ||
1823 | ret = parse_uint(content, &switch_timer_interval); | |
1824 | free(content); | |
1825 | if (ret) { | |
1826 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1827 | goto end; | |
1828 | } | |
1829 | ||
1830 | if (switch_timer_interval > UINT_MAX) { | |
1831 | WARN("switch_timer_interval out of range."); | |
1832 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1833 | goto end; | |
1834 | } | |
1835 | ||
1836 | channel->attr.switch_timer_interval = | |
1837 | switch_timer_interval; | |
1838 | } else if (!strcmp((const char *) attr_node->name, | |
1839 | config_element_read_timer_interval)) { | |
1840 | xmlChar *content; | |
1841 | uint64_t read_timer_interval = 0; | |
1842 | ||
1843 | /* read_timer_interval */ | |
1844 | content = xmlNodeGetContent(attr_node); | |
1845 | if (!content) { | |
1846 | ret = -LTTNG_ERR_NOMEM; | |
1847 | goto end; | |
1848 | } | |
1849 | ||
1850 | ret = parse_uint(content, &read_timer_interval); | |
1851 | free(content); | |
1852 | if (ret) { | |
1853 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1854 | goto end; | |
1855 | } | |
1856 | ||
1857 | if (read_timer_interval > UINT_MAX) { | |
1858 | WARN("read_timer_interval out of range."); | |
1859 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1860 | goto end; | |
1861 | } | |
1862 | ||
1863 | channel->attr.read_timer_interval = | |
1864 | read_timer_interval; | |
1865 | } else if (!strcmp((const char *) attr_node->name, | |
1866 | config_element_output_type)) { | |
1867 | xmlChar *content; | |
1868 | ||
1869 | /* output_type */ | |
1870 | content = xmlNodeGetContent(attr_node); | |
1871 | if (!content) { | |
1872 | ret = -LTTNG_ERR_NOMEM; | |
1873 | goto end; | |
1874 | } | |
1875 | ||
1876 | ret = get_output_type(content); | |
1877 | free(content); | |
1878 | if (ret < 0) { | |
1879 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1880 | goto end; | |
1881 | } | |
1882 | ||
1883 | channel->attr.output = ret; | |
1884 | } else if (!strcmp((const char *) attr_node->name, | |
1885 | config_element_tracefile_size)) { | |
1886 | xmlChar *content; | |
1887 | ||
1888 | /* tracefile_size */ | |
1889 | content = xmlNodeGetContent(attr_node); | |
1890 | if (!content) { | |
1891 | ret = -LTTNG_ERR_NOMEM; | |
1892 | goto end; | |
1893 | } | |
1894 | ||
1895 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
1896 | free(content); | |
1897 | if (ret) { | |
1898 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1899 | goto end; | |
1900 | } | |
1901 | } else if (!strcmp((const char *) attr_node->name, | |
1902 | config_element_tracefile_count)) { | |
1903 | xmlChar *content; | |
1904 | ||
1905 | /* tracefile_count */ | |
1906 | content = xmlNodeGetContent(attr_node); | |
1907 | if (!content) { | |
1908 | ret = -LTTNG_ERR_NOMEM; | |
1909 | goto end; | |
1910 | } | |
1911 | ||
1912 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
1913 | free(content); | |
1914 | if (ret) { | |
1915 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1916 | goto end; | |
1917 | } | |
1918 | } else if (!strcmp((const char *) attr_node->name, | |
1919 | config_element_live_timer_interval)) { | |
1920 | xmlChar *content; | |
1921 | uint64_t live_timer_interval = 0; | |
1922 | ||
1923 | /* live_timer_interval */ | |
1924 | content = xmlNodeGetContent(attr_node); | |
1925 | if (!content) { | |
1926 | ret = -LTTNG_ERR_NOMEM; | |
1927 | goto end; | |
1928 | } | |
1929 | ||
1930 | ret = parse_uint(content, &live_timer_interval); | |
1931 | free(content); | |
1932 | if (ret) { | |
1933 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1934 | goto end; | |
1935 | } | |
1936 | ||
1937 | if (live_timer_interval > UINT_MAX) { | |
1938 | WARN("live_timer_interval out of range."); | |
1939 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1940 | goto end; | |
1941 | } | |
1942 | ||
1943 | channel->attr.live_timer_interval = | |
1944 | live_timer_interval; | |
1945 | } else if (!strcmp((const char *) attr_node->name, | |
1946 | config_element_events)) { | |
1947 | /* events */ | |
1948 | *events_node = attr_node; | |
1949 | } else { | |
1950 | /* contexts */ | |
1951 | *contexts_node = attr_node; | |
1952 | } | |
1953 | ret = 0; | |
1954 | end: | |
1955 | return ret; | |
1956 | } | |
1957 | ||
1958 | static | |
1959 | int process_context_node(xmlNodePtr context_node, | |
1960 | struct lttng_handle *handle, const char *channel_name) | |
1961 | { | |
1962 | int ret; | |
1963 | struct lttng_event_context context; | |
1964 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
1965 | ||
1966 | assert(handle); | |
1967 | assert(channel_name); | |
1968 | ||
1969 | if (!context_child_node) { | |
1970 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1971 | goto end; | |
1972 | } | |
1973 | ||
1974 | memset(&context, 0, sizeof(context)); | |
1975 | ||
1976 | if (!strcmp((const char *) context_child_node->name, | |
1977 | config_element_type)) { | |
1978 | /* type */ | |
1979 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
1980 | if (!content) { | |
1981 | ret = -LTTNG_ERR_NOMEM; | |
1982 | goto end; | |
1983 | } | |
1984 | ||
1985 | ret = get_context_type(content); | |
1986 | free(content); | |
1987 | if (ret < 0) { | |
1988 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1989 | goto end; | |
1990 | } | |
1991 | ||
1992 | context.ctx = ret; | |
1993 | } else { | |
1994 | xmlNodePtr perf_attr_node; | |
1995 | ||
1996 | /* perf */ | |
14ce5bd8 JG |
1997 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
1998 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
1999 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
2000 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
2001 | perf_attr_node; perf_attr_node = | |
2002 | xmlNextElementSibling(perf_attr_node)) { | |
2003 | if (!strcmp((const char *) perf_attr_node->name, | |
2004 | config_element_type)) { | |
2005 | xmlChar *content; | |
2006 | uint64_t type = 0; | |
2007 | ||
2008 | /* type */ | |
2009 | content = xmlNodeGetContent(perf_attr_node); | |
2010 | if (!content) { | |
2011 | ret = -LTTNG_ERR_NOMEM; | |
2012 | goto end; | |
2013 | } | |
2014 | ||
2015 | ret = parse_uint(content, &type); | |
2016 | free(content); | |
2017 | if (ret) { | |
2018 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2019 | goto end; | |
2020 | } | |
2021 | ||
2022 | if (type > UINT32_MAX) { | |
2023 | WARN("perf context type out of range."); | |
2024 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2025 | goto end; | |
2026 | } | |
2027 | ||
2028 | context.u.perf_counter.type = type; | |
2029 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2030 | config_element_config)) { | |
2031 | xmlChar *content; | |
2032 | uint64_t config = 0; | |
2033 | ||
2034 | /* config */ | |
2035 | content = xmlNodeGetContent(perf_attr_node); | |
2036 | if (!content) { | |
2037 | ret = -LTTNG_ERR_NOMEM; | |
2038 | goto end; | |
2039 | } | |
2040 | ||
2041 | ret = parse_uint(content, &config); | |
2042 | free(content); | |
2043 | if (ret) { | |
2044 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2045 | goto end; | |
2046 | } | |
2047 | ||
2048 | context.u.perf_counter.config = config; | |
2049 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2050 | config_element_name)) { | |
2051 | xmlChar *content; | |
2052 | size_t name_len; | |
2053 | ||
2054 | /* name */ | |
2055 | content = xmlNodeGetContent(perf_attr_node); | |
2056 | if (!content) { | |
2057 | ret = -LTTNG_ERR_NOMEM; | |
2058 | goto end; | |
2059 | } | |
2060 | ||
2061 | name_len = strlen((char *) content); | |
2062 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2063 | WARN("perf context name too long."); | |
2064 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2065 | free(content); | |
2066 | goto end; | |
2067 | } | |
2068 | ||
2069 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2070 | name_len); | |
2071 | free(content); | |
2072 | } | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
2077 | end: | |
2078 | return ret; | |
2079 | } | |
2080 | ||
2081 | static | |
2082 | int process_contexts_node(xmlNodePtr contexts_node, | |
2083 | struct lttng_handle *handle, const char *channel_name) | |
2084 | { | |
2085 | int ret = 0; | |
2086 | xmlNodePtr context_node; | |
2087 | ||
2088 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2089 | context_node = xmlNextElementSibling(context_node)) { | |
2090 | ret = process_context_node(context_node, handle, channel_name); | |
2091 | if (ret) { | |
2092 | goto end; | |
2093 | } | |
2094 | } | |
2095 | end: | |
2096 | return ret; | |
2097 | } | |
2098 | ||
2099 | static | |
2100 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2101 | { | |
2102 | int ret; | |
2103 | struct lttng_domain domain = { 0 }; | |
2104 | struct lttng_handle *handle = NULL; | |
2105 | xmlNodePtr channels_node = NULL; | |
2106 | xmlNodePtr node; | |
2107 | ||
2108 | assert(session_name); | |
2109 | ||
2110 | ret = init_domain(domain_node, &domain); | |
2111 | if (ret) { | |
2112 | goto end; | |
2113 | } | |
2114 | ||
2115 | handle = lttng_create_handle(session_name, &domain); | |
2116 | if (!handle) { | |
2117 | ret = -LTTNG_ERR_NOMEM; | |
2118 | goto end; | |
2119 | } | |
2120 | ||
2121 | /* get the channels node */ | |
2122 | for (node = xmlFirstElementChild(domain_node); node; | |
2123 | node = xmlNextElementSibling(node)) { | |
2124 | if (!strcmp((const char *) node->name, | |
2125 | config_element_channels)) { | |
2126 | channels_node = node; | |
2127 | break; | |
2128 | } | |
2129 | } | |
2130 | ||
2131 | if (!channels_node) { | |
2132 | goto end; | |
2133 | } | |
2134 | ||
2135 | /* create all channels */ | |
2136 | for (node = xmlFirstElementChild(channels_node); node; | |
2137 | node = xmlNextElementSibling(node)) { | |
2138 | struct lttng_channel channel; | |
2139 | xmlNodePtr contexts_node = NULL; | |
2140 | xmlNodePtr events_node = NULL; | |
2141 | xmlNodePtr channel_attr_node; | |
2142 | ||
2143 | memset(&channel, 0, sizeof(channel)); | |
2144 | lttng_channel_set_default_attr(&domain, &channel.attr); | |
2145 | ||
2146 | for (channel_attr_node = xmlFirstElementChild(node); | |
2147 | channel_attr_node; channel_attr_node = | |
2148 | xmlNextElementSibling(channel_attr_node)) { | |
2149 | ret = process_channel_attr_node(channel_attr_node, | |
2150 | &channel, &contexts_node, &events_node); | |
2151 | if (ret) { | |
2152 | goto end; | |
2153 | } | |
2154 | } | |
2155 | ||
2156 | ret = lttng_enable_channel(handle, &channel); | |
2157 | if (ret < 0) { | |
2158 | goto end; | |
2159 | } | |
2160 | ||
2161 | ret = process_events_node(events_node, handle, channel.name); | |
2162 | if (ret) { | |
2163 | goto end; | |
2164 | } | |
2165 | ||
2166 | ret = process_contexts_node(contexts_node, handle, | |
2167 | channel.name); | |
2168 | if (ret) { | |
2169 | goto end; | |
2170 | } | |
2171 | } | |
2172 | end: | |
2173 | lttng_destroy_handle(handle); | |
2174 | return ret; | |
2175 | } | |
2176 | ||
2177 | static | |
2178 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
2179 | int override) | |
2180 | { | |
2181 | int ret, started = -1, snapshot_mode = -1; | |
2182 | uint64_t live_timer_interval = UINT64_MAX; | |
25248c1c | 2183 | xmlChar *name = NULL; |
dcf266c0 JG |
2184 | xmlNodePtr domains_node = NULL; |
2185 | xmlNodePtr output_node = NULL; | |
2186 | xmlNodePtr node; | |
2187 | struct lttng_domain *kernel_domain = NULL; | |
2188 | struct lttng_domain *ust_domain = NULL; | |
2189 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2190 | struct lttng_domain *log4j_domain = NULL; |
dcf266c0 JG |
2191 | |
2192 | for (node = xmlFirstElementChild(session_node); node; | |
2193 | node = xmlNextElementSibling(node)) { | |
2194 | if (!name && !strcmp((const char *) node->name, | |
2195 | config_element_name)) { | |
2196 | /* name */ | |
2197 | xmlChar *node_content = xmlNodeGetContent(node); | |
2198 | if (!node_content) { | |
2199 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2200 | goto error; |
dcf266c0 JG |
2201 | } |
2202 | ||
25248c1c | 2203 | name = node_content; |
dcf266c0 JG |
2204 | } else if (!domains_node && !strcmp((const char *) node->name, |
2205 | config_element_domains)) { | |
2206 | /* domains */ | |
2207 | domains_node = node; | |
2208 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2209 | config_element_started)) { | |
2210 | /* started */ | |
2211 | xmlChar *node_content = xmlNodeGetContent(node); | |
2212 | if (!node_content) { | |
2213 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2214 | goto error; |
dcf266c0 JG |
2215 | } |
2216 | ||
2217 | ret = parse_bool(node_content, &started); | |
2218 | free(node_content); | |
2219 | if (ret) { | |
2220 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2221 | goto error; |
dcf266c0 JG |
2222 | } |
2223 | } else if (!output_node && !strcmp((const char *) node->name, | |
2224 | config_element_output)) { | |
2225 | /* output */ | |
2226 | output_node = node; | |
2227 | } else { | |
2228 | /* attributes, snapshot_mode or live_timer_interval */ | |
2229 | xmlNodePtr attributes_child = | |
2230 | xmlFirstElementChild(node); | |
2231 | ||
2232 | if (!strcmp((const char *) attributes_child->name, | |
2233 | config_element_snapshot_mode)) { | |
2234 | /* snapshot_mode */ | |
2235 | xmlChar *snapshot_mode_content = | |
2236 | xmlNodeGetContent(attributes_child); | |
2237 | if (!snapshot_mode_content) { | |
2238 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2239 | goto error; |
dcf266c0 JG |
2240 | } |
2241 | ||
2242 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2243 | free(snapshot_mode_content); | |
2244 | if (ret) { | |
2245 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2246 | goto error; |
dcf266c0 JG |
2247 | } |
2248 | } else { | |
2249 | /* live_timer_interval */ | |
2250 | xmlChar *timer_interval_content = | |
2251 | xmlNodeGetContent(attributes_child); | |
2252 | if (!timer_interval_content) { | |
2253 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2254 | goto error; |
dcf266c0 JG |
2255 | } |
2256 | ||
2257 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2258 | free(timer_interval_content); | |
2259 | if (ret) { | |
2260 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2261 | goto error; |
dcf266c0 JG |
2262 | } |
2263 | } | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | if (!name) { | |
2268 | /* Mandatory attribute, as defined in the session XSD */ | |
2269 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2270 | goto error; |
dcf266c0 JG |
2271 | } |
2272 | ||
25248c1c | 2273 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 2274 | /* This is not the session we are looking for */ |
c2da8cde DG |
2275 | ret = -LTTNG_ERR_NO_SESSION; |
2276 | goto error; | |
dcf266c0 JG |
2277 | } |
2278 | ||
2279 | /* Init domains to create the session handles */ | |
2280 | for (node = xmlFirstElementChild(domains_node); node; | |
2281 | node = xmlNextElementSibling(node)) { | |
2282 | struct lttng_domain *domain; | |
2283 | ||
2284 | domain = zmalloc(sizeof(*domain)); | |
2285 | if (!domain) { | |
2286 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2287 | goto error; |
dcf266c0 JG |
2288 | } |
2289 | ||
2290 | ret = init_domain(node, domain); | |
2291 | if (ret) { | |
2292 | goto domain_init_error; | |
2293 | } | |
2294 | ||
2295 | switch (domain->type) { | |
2296 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2297 | if (kernel_domain) { |
2298 | /* Same domain seen twice, invalid! */ | |
2299 | goto domain_init_error; | |
2300 | } | |
dcf266c0 JG |
2301 | kernel_domain = domain; |
2302 | break; | |
2303 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2304 | if (ust_domain) { |
2305 | /* Same domain seen twice, invalid! */ | |
2306 | goto domain_init_error; | |
2307 | } | |
dcf266c0 JG |
2308 | ust_domain = domain; |
2309 | break; | |
2310 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2311 | if (jul_domain) { |
2312 | /* Same domain seen twice, invalid! */ | |
2313 | goto domain_init_error; | |
2314 | } | |
dcf266c0 JG |
2315 | jul_domain = domain; |
2316 | break; | |
5cdb6027 DG |
2317 | case LTTNG_DOMAIN_LOG4J: |
2318 | if (log4j_domain) { | |
2319 | /* Same domain seen twice, invalid! */ | |
2320 | goto domain_init_error; | |
2321 | } | |
2322 | log4j_domain = domain; | |
2323 | break; | |
dcf266c0 JG |
2324 | default: |
2325 | WARN("Invalid domain type"); | |
2326 | goto domain_init_error; | |
2327 | } | |
2328 | continue; | |
2329 | domain_init_error: | |
2330 | free(domain); | |
2331 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2332 | goto error; |
dcf266c0 JG |
2333 | } |
2334 | ||
2335 | if (override) { | |
2336 | /* Destroy session if it exists */ | |
25248c1c | 2337 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
2338 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
2339 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2340 | goto error; |
dcf266c0 JG |
2341 | } |
2342 | } | |
2343 | ||
2344 | /* Create session type depending on output type */ | |
2345 | if (snapshot_mode && snapshot_mode != -1) { | |
25248c1c | 2346 | ret = create_snapshot_session((const char *) name, output_node); |
dcf266c0 JG |
2347 | } else if (live_timer_interval && |
2348 | live_timer_interval != UINT64_MAX) { | |
25248c1c JG |
2349 | ret = create_session((const char *) name, kernel_domain, |
2350 | ust_domain, jul_domain, log4j_domain, | |
2351 | output_node, live_timer_interval); | |
dcf266c0 JG |
2352 | } else { |
2353 | /* regular session */ | |
25248c1c JG |
2354 | ret = create_session((const char *) name, kernel_domain, |
2355 | ust_domain, jul_domain, log4j_domain, | |
2356 | output_node, UINT64_MAX); | |
dcf266c0 | 2357 | } |
dcf266c0 | 2358 | if (ret) { |
c2da8cde | 2359 | goto error; |
dcf266c0 JG |
2360 | } |
2361 | ||
2362 | for (node = xmlFirstElementChild(domains_node); node; | |
2363 | node = xmlNextElementSibling(node)) { | |
25248c1c | 2364 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
2365 | if (ret) { |
2366 | goto end; | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | if (started) { | |
25248c1c | 2371 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
2372 | if (ret) { |
2373 | goto end; | |
2374 | } | |
2375 | } | |
c2da8cde | 2376 | |
dcf266c0 | 2377 | end: |
b2579dc1 | 2378 | if (ret < 0) { |
25248c1c JG |
2379 | ERR("Failed to load session %s: %s", (const char *) name, |
2380 | lttng_strerror(ret)); | |
2381 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
2382 | } |
2383 | ||
c2da8cde | 2384 | error: |
dcf266c0 JG |
2385 | free(kernel_domain); |
2386 | free(ust_domain); | |
2387 | free(jul_domain); | |
5cdb6027 | 2388 | free(log4j_domain); |
25248c1c | 2389 | xmlFree(name); |
dcf266c0 JG |
2390 | return ret; |
2391 | } | |
2392 | ||
cf53c06d DG |
2393 | /* |
2394 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2395 | * Return -1 if the path is EPERM. | |
2396 | */ | |
2397 | static int validate_file_read_creds(const char *path) | |
2398 | { | |
2399 | int ret; | |
2400 | ||
2401 | assert(path); | |
2402 | ||
2403 | /* Can we read the file. */ | |
2404 | ret = access(path, R_OK); | |
2405 | if (!ret) { | |
2406 | goto valid; | |
2407 | } | |
2408 | if (errno == EACCES) { | |
2409 | return -1; | |
2410 | } else { | |
2411 | /* Invalid. */ | |
2412 | return 0; | |
2413 | } | |
2414 | valid: | |
2415 | return 1; | |
2416 | } | |
2417 | ||
dcf266c0 JG |
2418 | static |
2419 | int load_session_from_file(const char *path, const char *session_name, | |
2420 | struct session_config_validation_ctx *validation_ctx, int override) | |
2421 | { | |
2422 | int ret, session_found = !session_name; | |
2423 | xmlDocPtr doc = NULL; | |
2424 | xmlNodePtr sessions_node; | |
2425 | xmlNodePtr session_node; | |
dcf266c0 JG |
2426 | |
2427 | assert(path); | |
2428 | assert(validation_ctx); | |
2429 | ||
cf53c06d DG |
2430 | ret = validate_file_read_creds(path); |
2431 | if (ret != 1) { | |
2432 | if (ret == -1) { | |
2433 | ret = -LTTNG_ERR_EPERM; | |
2434 | } else { | |
2435 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2436 | } | |
dcf266c0 JG |
2437 | goto end; |
2438 | } | |
2439 | ||
2440 | doc = xmlParseFile(path); | |
2441 | if (!doc) { | |
2442 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2443 | goto end; | |
2444 | } | |
2445 | ||
2446 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2447 | if (ret) { | |
2448 | ERR("Session configuration file validation failed"); | |
2449 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2450 | goto end; | |
2451 | } | |
2452 | ||
2453 | sessions_node = xmlDocGetRootElement(doc); | |
2454 | if (!sessions_node) { | |
2455 | goto end; | |
2456 | } | |
2457 | ||
2458 | for (session_node = xmlFirstElementChild(sessions_node); | |
2459 | session_node; session_node = | |
2460 | xmlNextElementSibling(session_node)) { | |
2461 | ret = process_session_node(session_node, | |
2462 | session_name, override); | |
2463 | if (session_name && ret == 0) { | |
2464 | /* Target session found and loaded */ | |
2465 | session_found = 1; | |
2466 | break; | |
2467 | } | |
2468 | } | |
2469 | end: | |
2470 | xmlFreeDoc(doc); | |
2471 | if (!ret) { | |
a96bc65d | 2472 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2473 | } |
2474 | return ret; | |
2475 | } | |
2476 | ||
dc5141b9 JG |
2477 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
2478 | static | |
2479 | struct dirent *alloc_dirent(const char *path) | |
2480 | { | |
2481 | size_t len; | |
2482 | long name_max; | |
2483 | struct dirent *entry; | |
2484 | ||
2485 | name_max = pathconf(path, _PC_NAME_MAX); | |
2486 | if (name_max == -1) { | |
2487 | name_max = PATH_MAX; | |
2488 | } | |
2489 | len = offsetof(struct dirent, d_name) + name_max + 1; | |
2490 | entry = zmalloc(len); | |
2491 | return entry; | |
2492 | } | |
2493 | ||
dcf266c0 JG |
2494 | static |
2495 | int load_session_from_path(const char *path, const char *session_name, | |
2496 | struct session_config_validation_ctx *validation_ctx, int override) | |
2497 | { | |
2498 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2499 | DIR *directory = NULL; |
2500 | ||
2501 | assert(path); | |
2502 | assert(validation_ctx); | |
2503 | ||
4af16958 DG |
2504 | directory = opendir(path); |
2505 | if (!directory) { | |
11143783 DG |
2506 | switch (errno) { |
2507 | case ENOTDIR: | |
0f0a81b5 DG |
2508 | /* Try the file loading. */ |
2509 | break; | |
11143783 DG |
2510 | case ENOENT: |
2511 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2512 | goto end; | |
2513 | default: | |
0f0a81b5 DG |
2514 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2515 | goto end; | |
4af16958 | 2516 | } |
dcf266c0 | 2517 | } |
4af16958 | 2518 | if (directory) { |
dcf266c0 JG |
2519 | struct dirent *entry; |
2520 | struct dirent *result; | |
2521 | char *file_path = NULL; | |
2522 | size_t path_len = strlen(path); | |
2523 | ||
2524 | if (path_len >= PATH_MAX) { | |
2525 | ret = -LTTNG_ERR_INVALID; | |
2526 | goto end; | |
2527 | } | |
2528 | ||
dc5141b9 | 2529 | entry = alloc_dirent(path); |
dcf266c0 JG |
2530 | if (!entry) { |
2531 | ret = -LTTNG_ERR_NOMEM; | |
2532 | goto end; | |
2533 | } | |
2534 | ||
dcf266c0 JG |
2535 | file_path = zmalloc(PATH_MAX); |
2536 | if (!file_path) { | |
2537 | ret = -LTTNG_ERR_NOMEM; | |
2538 | free(entry); | |
2539 | goto end; | |
2540 | } | |
2541 | ||
2542 | strncpy(file_path, path, path_len); | |
2543 | if (file_path[path_len - 1] != '/') { | |
2544 | file_path[path_len++] = '/'; | |
2545 | } | |
2546 | ||
4af16958 | 2547 | ret = 0; |
dcf266c0 JG |
2548 | /* Search for *.lttng files */ |
2549 | while (!readdir_r(directory, entry, &result) && result) { | |
2550 | size_t file_name_len = strlen(result->d_name); | |
2551 | ||
2552 | if (file_name_len <= | |
2553 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2554 | continue; | |
2555 | } | |
2556 | ||
431f702e | 2557 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2558 | continue; |
2559 | } | |
2560 | ||
2561 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2562 | result->d_name + file_name_len - sizeof( | |
2563 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2564 | continue; | |
2565 | } | |
2566 | ||
2567 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2568 | file_path[path_len + file_name_len] = '\0'; | |
2569 | ||
2570 | ret = load_session_from_file(file_path, session_name, | |
2571 | validation_ctx, override); | |
2572 | if (session_name && !ret) { | |
2573 | session_found = 1; | |
2574 | break; | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | free(entry); | |
2579 | free(file_path); | |
2580 | } else { | |
2581 | ret = load_session_from_file(path, session_name, | |
2582 | validation_ctx, override); | |
2583 | if (ret) { | |
2584 | goto end; | |
2585 | } else { | |
2586 | session_found = 1; | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | end: | |
2591 | if (directory) { | |
2592 | if (closedir(directory)) { | |
2593 | PERROR("closedir"); | |
2594 | } | |
2595 | } | |
2596 | ||
2597 | if (!session_found) { | |
a96bc65d | 2598 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2599 | } |
2600 | ||
2601 | return ret; | |
2602 | } | |
2603 | ||
ab38c13f DG |
2604 | /* |
2605 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 2606 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
2607 | */ |
2608 | static int validate_path_creds(const char *path) | |
2609 | { | |
2610 | int ret, uid = getuid(); | |
2611 | struct stat buf; | |
2612 | ||
2613 | assert(path); | |
2614 | ||
cf53c06d | 2615 | if (uid == 0) { |
ab38c13f DG |
2616 | goto valid; |
2617 | } | |
2618 | ||
2619 | ret = stat(path, &buf); | |
2620 | if (ret < 0) { | |
2621 | if (errno != ENOENT) { | |
2622 | PERROR("stat"); | |
2623 | } | |
2624 | ret = -LTTNG_ERR_INVALID; | |
2625 | goto valid; | |
2626 | } | |
2627 | ||
2628 | if (buf.st_uid != uid) { | |
2629 | goto invalid; | |
2630 | } | |
2631 | ||
2632 | valid: | |
ab38c13f | 2633 | return 1; |
cf53c06d DG |
2634 | invalid: |
2635 | return 0; | |
ab38c13f DG |
2636 | } |
2637 | ||
dcf266c0 JG |
2638 | LTTNG_HIDDEN |
2639 | int config_load_session(const char *path, const char *session_name, | |
ab38c13f | 2640 | int override, unsigned int autoload) |
dcf266c0 JG |
2641 | { |
2642 | int ret; | |
cf53c06d | 2643 | const char *path_ptr = NULL; |
dcf266c0 JG |
2644 | struct session_config_validation_ctx validation_ctx = { 0 }; |
2645 | ||
2646 | ret = init_session_config_validation_ctx(&validation_ctx); | |
2647 | if (ret) { | |
2648 | goto end; | |
2649 | } | |
2650 | ||
2651 | if (!path) { | |
ab38c13f DG |
2652 | char *home_path; |
2653 | const char *sys_path; | |
2654 | ||
dcf266c0 | 2655 | /* Try home path */ |
ab38c13f | 2656 | home_path = utils_get_home_dir(); |
dcf266c0 | 2657 | if (home_path) { |
ab38c13f | 2658 | char path[PATH_MAX]; |
dcf266c0 | 2659 | |
d4fcf703 DG |
2660 | /* |
2661 | * Try user session configuration path. Ignore error here so we can | |
2662 | * continue loading the system wide sessions. | |
2663 | */ | |
ab38c13f DG |
2664 | if (autoload) { |
2665 | ret = snprintf(path, sizeof(path), | |
2666 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
2667 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
2668 | if (ret < 0) { |
2669 | PERROR("snprintf session autoload home config path"); | |
2670 | goto end; | |
2671 | } | |
2672 | ||
2673 | /* | |
2674 | * Credentials are only validated for the autoload in order to | |
2675 | * avoid any user session daemon to try to load kernel sessions | |
2676 | * automatically and failing all the times. | |
2677 | */ | |
2678 | ret = validate_path_creds(path); | |
2679 | if (ret) { | |
2680 | path_ptr = path; | |
2681 | } | |
ab38c13f DG |
2682 | } else { |
2683 | ret = snprintf(path, sizeof(path), | |
2684 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
2685 | if (ret < 0) { |
2686 | PERROR("snprintf session home config path"); | |
2687 | goto end; | |
2688 | } | |
2689 | path_ptr = path; | |
ab38c13f | 2690 | } |
cf53c06d DG |
2691 | if (path_ptr) { |
2692 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 DG |
2693 | &validation_ctx, override); |
2694 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
2695 | goto end; | |
2696 | } | |
2697 | /* | |
2698 | * Continue even if the session was found since we have to try | |
2699 | * the system wide sessions. | |
2700 | */ | |
ab38c13f | 2701 | } |
d4fcf703 | 2702 | } |
ab38c13f | 2703 | |
cf53c06d DG |
2704 | /* Reset path pointer for the system wide dir. */ |
2705 | path_ptr = NULL; | |
2706 | ||
d4fcf703 DG |
2707 | /* Try system wide configuration directory. */ |
2708 | if (autoload) { | |
2709 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
2710 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
2711 | ret = validate_path_creds(sys_path); |
2712 | if (ret) { | |
2713 | path_ptr = sys_path; | |
2714 | } | |
d4fcf703 | 2715 | } else { |
cf53c06d DG |
2716 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
2717 | path_ptr = sys_path; | |
d4fcf703 DG |
2718 | } |
2719 | ||
cf53c06d DG |
2720 | if (path_ptr) { |
2721 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 | 2722 | &validation_ctx, override); |
dcf266c0 JG |
2723 | } |
2724 | } else { | |
2725 | ret = access(path, F_OK); | |
2726 | if (ret < 0) { | |
2727 | PERROR("access"); | |
2728 | switch (errno) { | |
2729 | case ENOENT: | |
2730 | ret = -LTTNG_ERR_INVALID; | |
2731 | WARN("Session configuration path does not exist."); | |
2732 | break; | |
2733 | case EACCES: | |
2734 | ret = -LTTNG_ERR_EPERM; | |
2735 | break; | |
2736 | default: | |
2737 | ret = -LTTNG_ERR_UNK; | |
2738 | break; | |
2739 | } | |
2740 | goto end; | |
2741 | } | |
2742 | ||
2743 | ret = load_session_from_path(path, session_name, | |
2744 | &validation_ctx, override); | |
2745 | } | |
2746 | end: | |
2747 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
2748 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
2749 | /* | |
2750 | * Don't report an error if no sessions are found when called | |
2751 | * without a session_name or a search path. | |
2752 | */ | |
2753 | ret = 0; | |
2754 | } | |
dcf266c0 JG |
2755 | return ret; |
2756 | } |