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