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