Commit | Line | Data |
---|---|---|
1501a7f3 JG |
1 | /* |
2 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
1501a7f3 | 20 | #include <assert.h> |
1501a7f3 | 21 | #include <ctype.h> |
1501a7f3 JG |
22 | #include <stdio.h> |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
36f2332b | 25 | #include <inttypes.h> |
dcf266c0 JG |
26 | #include <dirent.h> |
27 | #include <unistd.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/stat.h> | |
1501a7f3 JG |
30 | |
31 | #include <common/defaults.h> | |
32 | #include <common/error.h> | |
33 | #include <common/macros.h> | |
34 | #include <common/utils.h> | |
e8fa9fb0 | 35 | #include <common/compat/getenv.h> |
fb198a11 JG |
36 | #include <lttng/lttng-error.h> |
37 | #include <libxml/parser.h> | |
38 | #include <libxml/valid.h> | |
39 | #include <libxml/xmlschemas.h> | |
dcf266c0 JG |
40 | #include <libxml/tree.h> |
41 | #include <lttng/lttng.h> | |
42 | #include <lttng/snapshot.h> | |
1501a7f3 JG |
43 | |
44 | #include "config.h" | |
36f2332b | 45 | #include "config-internal.h" |
1501a7f3 JG |
46 | |
47 | struct handler_filter_args { | |
48 | const char* section; | |
49 | config_entry_handler_cb handler; | |
50 | void *user_data; | |
51 | }; | |
52 | ||
dcf266c0 JG |
53 | struct session_config_validation_ctx { |
54 | xmlSchemaParserCtxtPtr parser_ctx; | |
55 | xmlSchemaPtr schema; | |
56 | xmlSchemaValidCtxtPtr schema_validation_ctx; | |
57 | }; | |
58 | ||
1501a7f3 JG |
59 | const char * const config_str_yes = "yes"; |
60 | const char * const config_str_true = "true"; | |
61 | const char * const config_str_on = "on"; | |
62 | const char * const config_str_no = "no"; | |
63 | const char * const config_str_false = "false"; | |
64 | const char * const config_str_off = "off"; | |
36f2332b | 65 | const char * const config_xml_encoding = "UTF-8"; |
fb198a11 | 66 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
36f2332b JG |
67 | const char * const config_xml_indent_string = "\t"; |
68 | const char * const config_xml_true = "true"; | |
69 | const char * const config_xml_false = "false"; | |
1501a7f3 | 70 | |
fb198a11 JG |
71 | const char * const config_element_channel = "channel"; |
72 | const char * const config_element_channels = "channels"; | |
73 | const char * const config_element_domain = "domain"; | |
74 | const char * const config_element_domains = "domains"; | |
75 | const char * const config_element_event = "event"; | |
76 | const char * const config_element_events = "events"; | |
77 | const char * const config_element_context = "context"; | |
78 | const char * const config_element_contexts = "contexts"; | |
79 | const char * const config_element_attributes = "attributes"; | |
80 | const char * const config_element_exclusion = "exclusion"; | |
81 | const char * const config_element_exclusions = "exclusions"; | |
82 | const char * const config_element_function_attributes = "function_attributes"; | |
83 | const char * const config_element_probe_attributes = "probe_attributes"; | |
84 | const char * const config_element_symbol_name = "symbol_name"; | |
85 | const char * const config_element_address = "address"; | |
86 | const char * const config_element_offset = "offset"; | |
87 | const char * const config_element_name = "name"; | |
88 | const char * const config_element_enabled = "enabled"; | |
89 | const char * const config_element_overwrite_mode = "overwrite_mode"; | |
90 | const char * const config_element_subbuf_size = "subbuffer_size"; | |
91 | const char * const config_element_num_subbuf = "subbuffer_count"; | |
92 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; | |
93 | const char * const config_element_read_timer_interval = "read_timer_interval"; | |
94 | const char * const config_element_output = "output"; | |
95 | const char * const config_element_output_type = "output_type"; | |
96 | const char * const config_element_tracefile_size = "tracefile_size"; | |
97 | const char * const config_element_tracefile_count = "tracefile_count"; | |
98 | const char * const config_element_live_timer_interval = "live_timer_interval"; | |
99 | const char * const config_element_type = "type"; | |
100 | const char * const config_element_buffer_type = "buffer_type"; | |
101 | const char * const config_element_session = "session"; | |
102 | const char * const config_element_sessions = "sessions"; | |
103 | const char * const config_element_perf = "perf"; | |
104 | const char * const config_element_config = "config"; | |
105 | const char * const config_element_started = "started"; | |
106 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
107 | const char * const config_element_loglevel = "loglevel"; | |
108 | const char * const config_element_loglevel_type = "loglevel_type"; | |
109 | const char * const config_element_filter = "filter"; | |
110 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; | |
111 | const char * const config_element_consumer_output = "consumer_output"; | |
112 | const char * const config_element_destination = "destination"; | |
113 | const char * const config_element_path = "path"; | |
114 | const char * const config_element_net_output = "net_output"; | |
115 | const char * const config_element_control_uri = "control_uri"; | |
116 | const char * const config_element_data_uri = "data_uri"; | |
117 | const char * const config_element_max_size = "max_size"; | |
ccf10263 MD |
118 | const char * const config_element_pid = "pid"; |
119 | const char * const config_element_pids = "pids"; | |
9e7c9f56 | 120 | const char * const config_element_shared_memory_path = "shared_memory_path"; |
fb198a11 JG |
121 | |
122 | const char * const config_domain_type_kernel = "KERNEL"; | |
123 | const char * const config_domain_type_ust = "UST"; | |
124 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 125 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 126 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
127 | |
128 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
129 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
130 | const char * const config_buffer_type_global = "GLOBAL"; | |
131 | ||
132 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
133 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
134 | ||
135 | const char * const config_output_type_splice = "SPLICE"; | |
136 | const char * const config_output_type_mmap = "MMAP"; | |
137 | ||
138 | const char * const config_loglevel_type_all = "ALL"; | |
139 | const char * const config_loglevel_type_range = "RANGE"; | |
140 | const char * const config_loglevel_type_single = "SINGLE"; | |
141 | ||
142 | const char * const config_event_type_all = "ALL"; | |
143 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
144 | const char * const config_event_type_probe = "PROBE"; | |
145 | const char * const config_event_type_function = "FUNCTION"; | |
146 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
147 | const char * const config_event_type_noop = "NOOP"; | |
148 | const char * const config_event_type_syscall = "SYSCALL"; | |
149 | const char * const config_event_type_kprobe = "KPROBE"; | |
150 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
151 | ||
152 | const char * const config_event_context_pid = "PID"; | |
153 | const char * const config_event_context_procname = "PROCNAME"; | |
154 | const char * const config_event_context_prio = "PRIO"; | |
155 | const char * const config_event_context_nice = "NICE"; | |
156 | const char * const config_event_context_vpid = "VPID"; | |
157 | const char * const config_event_context_tid = "TID"; | |
158 | const char * const config_event_context_vtid = "VTID"; | |
159 | const char * const config_event_context_ppid = "PPID"; | |
160 | const char * const config_event_context_vppid = "VPPID"; | |
161 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
162 | const char * const config_event_context_hostname = "HOSTNAME"; | |
163 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 164 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
fb198a11 | 165 | |
dcf266c0 JG |
166 | struct consumer_output { |
167 | int enabled; | |
168 | char *path; | |
169 | char *control_uri; | |
170 | char *data_uri; | |
171 | }; | |
172 | ||
1501a7f3 JG |
173 | static int config_entry_handler_filter(struct handler_filter_args *args, |
174 | const char *section, const char *name, const char *value) | |
175 | { | |
176 | int ret = 0; | |
177 | struct config_entry entry = { section, name, value }; | |
178 | ||
179 | assert(args); | |
180 | ||
181 | if (!section || !name || !value) { | |
182 | ret = -EIO; | |
183 | goto end; | |
184 | } | |
185 | ||
186 | if (args->section) { | |
187 | if (strcmp(args->section, section)) { | |
188 | goto end; | |
189 | } | |
190 | } | |
191 | ||
192 | ret = args->handler(&entry, args->user_data); | |
193 | end: | |
194 | return ret; | |
195 | } | |
196 | ||
197 | LTTNG_HIDDEN | |
198 | int config_get_section_entries(const char *override_path, const char *section, | |
199 | config_entry_handler_cb handler, void *user_data) | |
200 | { | |
201 | int ret = 0; | |
7ab02a27 | 202 | char *path; |
1501a7f3 JG |
203 | FILE *config_file = NULL; |
204 | struct handler_filter_args filter = { section, handler, user_data }; | |
205 | ||
7ab02a27 DG |
206 | /* First, try system-wide conf. file. */ |
207 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
208 | ||
209 | config_file = fopen(path, "r"); | |
210 | if (config_file) { | |
211 | DBG("Loading daemon conf file at %s", path); | |
212 | /* | |
213 | * Return value is not very important here since error or not, we | |
214 | * continue and try the next possible conf. file. | |
215 | */ | |
216 | (void) ini_parse_file(config_file, | |
217 | (ini_entry_handler) config_entry_handler_filter, | |
218 | (void *) &filter); | |
219 | fclose(config_file); | |
220 | } | |
221 | ||
222 | /* Second is the user local configuration. */ | |
223 | path = utils_get_home_dir(); | |
224 | if (path) { | |
225 | char fullpath[PATH_MAX]; | |
226 | ||
227 | ret = snprintf(fullpath, sizeof(fullpath), | |
228 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
229 | if (ret < 0) { | |
230 | PERROR("snprintf user conf. path"); | |
231 | goto error; | |
232 | } | |
233 | ||
234 | config_file = fopen(fullpath, "r"); | |
235 | if (config_file) { | |
236 | DBG("Loading daemon user conf file at %s", path); | |
237 | /* | |
238 | * Return value is not very important here since error or not, we | |
239 | * continue and try the next possible conf. file. | |
240 | */ | |
241 | (void) ini_parse_file(config_file, | |
242 | (ini_entry_handler) config_entry_handler_filter, | |
243 | (void *) &filter); | |
244 | fclose(config_file); | |
245 | } | |
246 | } | |
247 | ||
248 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
249 | if (override_path) { |
250 | config_file = fopen(override_path, "r"); | |
251 | if (config_file) { | |
7ab02a27 DG |
252 | DBG("Loading daemon command line conf file at %s", override_path); |
253 | (void) ini_parse_file(config_file, | |
254 | (ini_entry_handler) config_entry_handler_filter, | |
255 | (void *) &filter); | |
256 | fclose(config_file); | |
1501a7f3 JG |
257 | } else { |
258 | ERR("Failed to open daemon configuration file at %s", | |
259 | override_path); | |
260 | ret = -ENOENT; | |
7ab02a27 | 261 | goto error; |
1501a7f3 JG |
262 | } |
263 | } | |
264 | ||
7ab02a27 DG |
265 | /* Everything went well. */ |
266 | ret = 0; | |
1501a7f3 | 267 | |
7ab02a27 | 268 | error: |
1501a7f3 JG |
269 | return ret; |
270 | } | |
271 | ||
272 | LTTNG_HIDDEN | |
273 | int config_parse_value(const char *value) | |
274 | { | |
275 | int i, ret = 0; | |
276 | char *endptr, *lower_str; | |
277 | size_t len; | |
278 | unsigned long v; | |
279 | ||
280 | len = strlen(value); | |
281 | if (!len) { | |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | v = strtoul(value, &endptr, 10); | |
287 | if (endptr != value) { | |
288 | ret = v; | |
289 | goto end; | |
290 | } | |
291 | ||
292 | lower_str = zmalloc(len + 1); | |
293 | if (!lower_str) { | |
294 | PERROR("zmalloc"); | |
295 | ret = -errno; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | for (i = 0; i < len; i++) { | |
300 | lower_str[i] = tolower(value[i]); | |
301 | } | |
302 | ||
303 | if (!strcmp(lower_str, config_str_yes) || | |
304 | !strcmp(lower_str, config_str_true) || | |
305 | !strcmp(lower_str, config_str_on)) { | |
306 | ret = 1; | |
307 | } else if (!strcmp(lower_str, config_str_no) || | |
308 | !strcmp(lower_str, config_str_false) || | |
309 | !strcmp(lower_str, config_str_off)) { | |
310 | ret = 0; | |
311 | } else { | |
312 | ret = -1; | |
313 | } | |
314 | ||
315 | free(lower_str); | |
316 | end: | |
317 | return ret; | |
318 | } | |
36f2332b JG |
319 | |
320 | /* | |
321 | * Returns a xmlChar string which must be released using xmlFree(). | |
322 | */ | |
323 | static xmlChar *encode_string(const char *in_str) | |
324 | { | |
325 | xmlChar *out_str = NULL; | |
326 | xmlCharEncodingHandlerPtr handler; | |
327 | int out_len, ret, in_len; | |
328 | ||
329 | assert(in_str); | |
330 | ||
331 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
332 | if (!handler) { | |
333 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
334 | goto end; | |
335 | } | |
336 | ||
337 | in_len = strlen(in_str); | |
338 | /* | |
339 | * Add 1 byte for the NULL terminted character. The factor 2 here is | |
340 | * because UTF-8 can be on two bytes so this fits the worst case for each | |
341 | * bytes. | |
342 | */ | |
343 | out_len = (in_len * 2) + 1; | |
344 | out_str = xmlMalloc(out_len); | |
345 | if (!out_str) { | |
346 | goto end; | |
347 | } | |
348 | ||
349 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
350 | if (ret < 0) { | |
351 | xmlFree(out_str); | |
352 | out_str = NULL; | |
353 | goto end; | |
354 | } | |
355 | ||
356 | /* out_len is now the size of out_str */ | |
357 | out_str[out_len] = '\0'; | |
358 | end: | |
359 | return out_str; | |
360 | } | |
361 | ||
362 | LTTNG_HIDDEN | |
705bb62f | 363 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
364 | { |
365 | int ret; | |
366 | struct config_writer *writer; | |
367 | xmlOutputBufferPtr buffer; | |
368 | ||
369 | writer = zmalloc(sizeof(struct config_writer)); | |
370 | if (!writer) { | |
371 | PERROR("zmalloc config_writer_create"); | |
372 | goto end; | |
373 | } | |
374 | ||
375 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
376 | if (!buffer) { | |
377 | goto error_destroy; | |
378 | } | |
379 | ||
380 | writer->writer = xmlNewTextWriter(buffer); | |
381 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
382 | config_xml_encoding, NULL); | |
383 | if (ret < 0) { | |
384 | goto error_destroy; | |
385 | } | |
386 | ||
387 | ret = xmlTextWriterSetIndentString(writer->writer, | |
388 | BAD_CAST config_xml_indent_string); | |
705bb62f | 389 | if (ret) { |
36f2332b JG |
390 | goto error_destroy; |
391 | } | |
392 | ||
705bb62f JRJ |
393 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
394 | if (ret) { | |
36f2332b JG |
395 | goto error_destroy; |
396 | } | |
397 | ||
398 | end: | |
399 | return writer; | |
400 | error_destroy: | |
401 | config_writer_destroy(writer); | |
402 | return NULL; | |
403 | } | |
404 | ||
405 | LTTNG_HIDDEN | |
406 | int config_writer_destroy(struct config_writer *writer) | |
407 | { | |
408 | int ret = 0; | |
409 | ||
410 | if (!writer) { | |
411 | ret = -EINVAL; | |
412 | goto end; | |
413 | } | |
414 | ||
415 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
416 | WARN("Could not close XML document"); | |
417 | ret = -EIO; | |
418 | } | |
419 | ||
420 | if (writer->writer) { | |
421 | xmlFreeTextWriter(writer->writer); | |
422 | } | |
423 | ||
424 | free(writer); | |
425 | end: | |
426 | return ret; | |
427 | } | |
428 | ||
429 | LTTNG_HIDDEN | |
430 | int config_writer_open_element(struct config_writer *writer, | |
431 | const char *element_name) | |
432 | { | |
433 | int ret; | |
434 | xmlChar *encoded_element_name; | |
435 | ||
436 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
437 | ret = -1; | |
438 | goto end; | |
439 | } | |
440 | ||
441 | encoded_element_name = encode_string(element_name); | |
442 | if (!encoded_element_name) { | |
443 | ret = -1; | |
444 | goto end; | |
445 | } | |
446 | ||
447 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
448 | xmlFree(encoded_element_name); | |
449 | end: | |
450 | return ret > 0 ? 0 : ret; | |
451 | } | |
452 | ||
453 | LTTNG_HIDDEN | |
454 | int config_writer_close_element(struct config_writer *writer) | |
455 | { | |
456 | int ret; | |
457 | ||
458 | if (!writer || !writer->writer) { | |
459 | ret = -1; | |
460 | goto end; | |
461 | } | |
462 | ||
463 | ret = xmlTextWriterEndElement(writer->writer); | |
464 | end: | |
465 | return ret > 0 ? 0 : ret; | |
466 | } | |
467 | ||
468 | LTTNG_HIDDEN | |
469 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
470 | const char *element_name, uint64_t value) | |
471 | { | |
472 | int ret; | |
473 | xmlChar *encoded_element_name; | |
474 | ||
475 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
476 | ret = -1; | |
477 | goto end; | |
478 | } | |
479 | ||
480 | encoded_element_name = encode_string(element_name); | |
481 | if (!encoded_element_name) { | |
482 | ret = -1; | |
483 | goto end; | |
484 | } | |
485 | ||
486 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
487 | encoded_element_name, "%" PRIu64, value); | |
488 | xmlFree(encoded_element_name); | |
489 | end: | |
490 | return ret > 0 ? 0 : ret; | |
491 | } | |
492 | ||
493 | LTTNG_HIDDEN | |
494 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
495 | const char *element_name, int64_t value) | |
496 | { | |
497 | int ret; | |
498 | xmlChar *encoded_element_name; | |
499 | ||
500 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
501 | ret = -1; | |
502 | goto end; | |
503 | } | |
504 | ||
505 | encoded_element_name = encode_string(element_name); | |
506 | if (!encoded_element_name) { | |
507 | ret = -1; | |
508 | goto end; | |
509 | } | |
510 | ||
511 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
512 | encoded_element_name, "%" PRIi64, value); | |
513 | xmlFree(encoded_element_name); | |
514 | end: | |
515 | return ret > 0 ? 0 : ret; | |
516 | } | |
517 | ||
518 | LTTNG_HIDDEN | |
519 | int config_writer_write_element_bool(struct config_writer *writer, | |
520 | const char *element_name, int value) | |
521 | { | |
522 | return config_writer_write_element_string(writer, element_name, | |
523 | value ? config_xml_true : config_xml_false); | |
524 | } | |
525 | ||
526 | LTTNG_HIDDEN | |
527 | int config_writer_write_element_string(struct config_writer *writer, | |
528 | const char *element_name, const char *value) | |
529 | { | |
530 | int ret; | |
531 | xmlChar *encoded_element_name = NULL; | |
532 | xmlChar *encoded_value = NULL; | |
533 | ||
534 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
535 | !value) { | |
536 | ret = -1; | |
537 | goto end; | |
538 | } | |
539 | ||
540 | encoded_element_name = encode_string(element_name); | |
541 | if (!encoded_element_name) { | |
542 | ret = -1; | |
543 | goto end; | |
544 | } | |
545 | ||
546 | encoded_value = encode_string(value); | |
547 | if (!encoded_value) { | |
548 | ret = -1; | |
549 | goto end; | |
550 | } | |
551 | ||
552 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 553 | encoded_value); |
36f2332b JG |
554 | end: |
555 | xmlFree(encoded_element_name); | |
556 | xmlFree(encoded_value); | |
557 | return ret > 0 ? 0 : ret; | |
558 | } | |
dcf266c0 JG |
559 | |
560 | static | |
561 | void xml_error_handler(void *ctx, const char *format, ...) | |
562 | { | |
563 | char *errMsg; | |
564 | va_list args; | |
565 | int ret; | |
566 | ||
567 | va_start(args, format); | |
568 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 569 | va_end(args); |
dcf266c0 JG |
570 | if (ret == -1) { |
571 | ERR("String allocation failed in xml error handler"); | |
572 | return; | |
573 | } | |
dcf266c0 JG |
574 | |
575 | fprintf(stderr, "XML Error: %s", errMsg); | |
576 | free(errMsg); | |
577 | } | |
578 | ||
579 | static | |
580 | void fini_session_config_validation_ctx( | |
581 | struct session_config_validation_ctx *ctx) | |
582 | { | |
583 | if (ctx->parser_ctx) { | |
584 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
585 | } | |
586 | ||
587 | if (ctx->schema) { | |
588 | xmlSchemaFree(ctx->schema); | |
589 | } | |
590 | ||
591 | if (ctx->schema_validation_ctx) { | |
592 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
593 | } | |
594 | ||
595 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
596 | } | |
597 | ||
54e399cb JG |
598 | static |
599 | char *get_session_config_xsd_path() | |
600 | { | |
601 | char *xsd_path; | |
e8fa9fb0 | 602 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
603 | size_t base_path_len; |
604 | size_t max_path_len; | |
605 | ||
606 | if (!base_path) { | |
607 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
608 | } | |
609 | ||
610 | base_path_len = strlen(base_path); | |
611 | max_path_len = base_path_len + | |
612 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
613 | xsd_path = zmalloc(max_path_len); | |
614 | if (!xsd_path) { | |
615 | goto end; | |
616 | } | |
617 | ||
618 | strncpy(xsd_path, base_path, max_path_len); | |
619 | if (xsd_path[base_path_len - 1] != '/') { | |
620 | xsd_path[base_path_len++] = '/'; | |
621 | } | |
622 | ||
623 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
624 | max_path_len - base_path_len); | |
625 | end: | |
626 | return xsd_path; | |
627 | } | |
628 | ||
dcf266c0 JG |
629 | static |
630 | int init_session_config_validation_ctx( | |
631 | struct session_config_validation_ctx *ctx) | |
632 | { | |
633 | int ret; | |
54e399cb JG |
634 | char *xsd_path = get_session_config_xsd_path(); |
635 | ||
636 | if (!xsd_path) { | |
637 | ret = -LTTNG_ERR_NOMEM; | |
638 | goto end; | |
639 | } | |
dcf266c0 | 640 | |
54e399cb | 641 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
642 | if (!ctx->parser_ctx) { |
643 | ERR("XSD parser context creation failed"); | |
644 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
645 | goto end; | |
646 | } | |
647 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
648 | xml_error_handler, NULL); | |
649 | ||
650 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
651 | if (!ctx->schema) { | |
652 | ERR("XSD parsing failed"); | |
653 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
654 | goto end; | |
655 | } | |
656 | ||
657 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
658 | if (!ctx->schema_validation_ctx) { | |
659 | ERR("XSD validation context creation failed"); | |
660 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
661 | goto end; | |
662 | } | |
663 | ||
664 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
665 | xml_error_handler, NULL); | |
666 | ret = 0; | |
667 | ||
668 | end: | |
669 | if (ret) { | |
670 | fini_session_config_validation_ctx(ctx); | |
671 | } | |
672 | ||
54e399cb | 673 | free(xsd_path); |
dcf266c0 JG |
674 | return ret; |
675 | } | |
676 | ||
677 | static | |
678 | int parse_uint(xmlChar *str, uint64_t *val) | |
679 | { | |
680 | int ret; | |
681 | char *endptr; | |
682 | ||
683 | if (!str || !val) { | |
684 | ret = -1; | |
685 | goto end; | |
686 | } | |
687 | ||
688 | *val = strtoull((const char *) str, &endptr, 10); | |
689 | if (!endptr || *endptr) { | |
690 | ret = -1; | |
691 | } else { | |
692 | ret = 0; | |
693 | } | |
694 | ||
695 | end: | |
696 | return ret; | |
697 | } | |
698 | ||
699 | static | |
700 | int parse_int(xmlChar *str, int64_t *val) | |
701 | { | |
702 | int ret; | |
703 | char *endptr; | |
704 | ||
705 | if (!str || !val) { | |
706 | ret = -1; | |
707 | goto end; | |
708 | } | |
709 | ||
710 | *val = strtoll((const char *) str, &endptr, 10); | |
711 | if (!endptr || *endptr) { | |
712 | ret = -1; | |
713 | } else { | |
714 | ret = 0; | |
715 | } | |
716 | ||
717 | end: | |
718 | return ret; | |
719 | } | |
720 | ||
721 | static | |
722 | int parse_bool(xmlChar *str, int *val) | |
723 | { | |
724 | int ret = 0; | |
725 | ||
726 | if (!str || !val) { | |
727 | ret = -1; | |
728 | goto end; | |
729 | } | |
730 | ||
731 | if (!strcmp((const char *) str, config_xml_true)) { | |
732 | *val = 1; | |
733 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
734 | *val = 0; | |
735 | } else { | |
736 | WARN("Invalid boolean value encoutered (%s).", | |
737 | (const char *) str); | |
738 | ret = -1; | |
739 | } | |
740 | end: | |
741 | return ret; | |
742 | } | |
743 | ||
744 | static | |
745 | int get_domain_type(xmlChar *domain) | |
746 | { | |
747 | int ret; | |
748 | ||
749 | if (!domain) { | |
750 | goto error; | |
751 | } | |
752 | ||
753 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
754 | ret = LTTNG_DOMAIN_KERNEL; | |
755 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
756 | ret = LTTNG_DOMAIN_UST; | |
757 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
758 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
759 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
760 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
761 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
762 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
763 | } else { |
764 | goto error; | |
765 | } | |
766 | ||
767 | return ret; | |
768 | error: | |
769 | return -1; | |
770 | } | |
771 | ||
772 | static | |
773 | int get_buffer_type(xmlChar *buffer_type) | |
774 | { | |
775 | int ret; | |
776 | ||
777 | if (!buffer_type) { | |
778 | goto error; | |
779 | } | |
780 | ||
781 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
782 | ret = LTTNG_BUFFER_GLOBAL; | |
783 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
784 | ret = LTTNG_BUFFER_PER_UID; | |
785 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
786 | ret = LTTNG_BUFFER_PER_PID; | |
787 | } else { | |
788 | goto error; | |
789 | } | |
790 | ||
791 | return ret; | |
792 | error: | |
793 | return -1; | |
794 | } | |
795 | ||
796 | static | |
797 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
798 | { | |
799 | int ret; | |
800 | ||
801 | if (!overwrite_mode) { | |
802 | goto error; | |
803 | } | |
804 | ||
805 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
806 | ret = 1; | |
807 | } else if (!strcmp((char *) overwrite_mode, | |
808 | config_overwrite_mode_discard)) { | |
809 | ret = 0; | |
810 | } else { | |
811 | goto error; | |
812 | } | |
813 | ||
814 | return ret; | |
815 | error: | |
816 | return -1; | |
817 | } | |
818 | ||
819 | static | |
820 | int get_output_type(xmlChar *output_type) | |
821 | { | |
822 | int ret; | |
823 | ||
824 | if (!output_type) { | |
825 | goto error; | |
826 | } | |
827 | ||
828 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
829 | ret = LTTNG_EVENT_MMAP; | |
830 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
831 | ret = LTTNG_EVENT_SPLICE; | |
832 | } else { | |
833 | goto error; | |
834 | } | |
835 | ||
836 | return ret; | |
837 | error: | |
838 | return -1; | |
839 | } | |
840 | ||
841 | static | |
842 | int get_event_type(xmlChar *event_type) | |
843 | { | |
844 | int ret; | |
845 | ||
846 | if (!event_type) { | |
847 | goto error; | |
848 | } | |
849 | ||
850 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
851 | ret = LTTNG_EVENT_ALL; | |
852 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
853 | ret = LTTNG_EVENT_TRACEPOINT; | |
854 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
855 | ret = LTTNG_EVENT_PROBE; | |
856 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
857 | ret = LTTNG_EVENT_FUNCTION; | |
858 | } else if (!strcmp((char *) event_type, | |
859 | config_event_type_function_entry)) { | |
860 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
861 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
862 | ret = LTTNG_EVENT_NOOP; | |
863 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
864 | ret = LTTNG_EVENT_SYSCALL; | |
865 | } else { | |
866 | goto error; | |
867 | } | |
868 | ||
869 | return ret; | |
870 | error: | |
871 | return -1; | |
872 | } | |
873 | ||
874 | static | |
875 | int get_loglevel_type(xmlChar *loglevel_type) | |
876 | { | |
877 | int ret; | |
878 | ||
879 | if (!loglevel_type) { | |
880 | goto error; | |
881 | } | |
882 | ||
883 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
884 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
885 | } else if (!strcmp((char *) loglevel_type, | |
886 | config_loglevel_type_range)) { | |
887 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
888 | } else if (!strcmp((char *) loglevel_type, | |
889 | config_loglevel_type_single)) { | |
890 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
891 | } else { | |
892 | goto error; | |
893 | } | |
894 | ||
895 | return ret; | |
896 | error: | |
897 | return -1; | |
898 | } | |
899 | ||
900 | /* | |
901 | * Return the context type or -1 on error. | |
902 | */ | |
903 | static | |
904 | int get_context_type(xmlChar *context_type) | |
905 | { | |
906 | int ret; | |
907 | ||
908 | if (!context_type) { | |
909 | goto error; | |
910 | } | |
911 | ||
912 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
913 | ret = LTTNG_EVENT_CONTEXT_PID; | |
914 | } else if (!strcmp((char *) context_type, | |
915 | config_event_context_procname)) { | |
916 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
917 | } else if (!strcmp((char *) context_type, | |
918 | config_event_context_prio)) { | |
919 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
920 | } else if (!strcmp((char *) context_type, | |
921 | config_event_context_nice)) { | |
922 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
923 | } else if (!strcmp((char *) context_type, | |
924 | config_event_context_vpid)) { | |
925 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
926 | } else if (!strcmp((char *) context_type, | |
927 | config_event_context_tid)) { | |
928 | ret = LTTNG_EVENT_CONTEXT_TID; | |
929 | } else if (!strcmp((char *) context_type, | |
930 | config_event_context_vtid)) { | |
931 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
932 | } else if (!strcmp((char *) context_type, | |
933 | config_event_context_ppid)) { | |
934 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
935 | } else if (!strcmp((char *) context_type, | |
936 | config_event_context_vppid)) { | |
937 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
938 | } else if (!strcmp((char *) context_type, | |
939 | config_event_context_pthread_id)) { | |
940 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
941 | } else if (!strcmp((char *) context_type, | |
942 | config_event_context_hostname)) { | |
943 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
944 | } else if (!strcmp((char *) context_type, | |
945 | config_event_context_ip)) { | |
946 | ret = LTTNG_EVENT_CONTEXT_IP; | |
947 | } else { | |
948 | goto error; | |
949 | } | |
950 | ||
951 | return ret; | |
952 | error: | |
953 | return -1; | |
954 | } | |
955 | ||
956 | static | |
957 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
958 | { | |
959 | int ret; | |
960 | xmlNodePtr node; | |
961 | ||
962 | for (node = xmlFirstElementChild(domain_node); node; | |
963 | node = xmlNextElementSibling(node)) { | |
964 | if (!strcmp((const char *) node->name, config_element_type)) { | |
965 | /* domain type */ | |
966 | xmlChar *node_content = xmlNodeGetContent(node); | |
967 | if (!node_content) { | |
968 | ret = -LTTNG_ERR_NOMEM; | |
969 | goto end; | |
970 | } | |
971 | ||
972 | ret = get_domain_type(node_content); | |
973 | free(node_content); | |
974 | if (ret < 0) { | |
975 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
976 | goto end; | |
977 | } | |
978 | ||
979 | domain->type = ret; | |
980 | } else if (!strcmp((const char *) node->name, | |
981 | config_element_buffer_type)) { | |
982 | /* buffer type */ | |
983 | xmlChar *node_content = xmlNodeGetContent(node); | |
984 | if (!node_content) { | |
985 | ret = -LTTNG_ERR_NOMEM; | |
986 | goto end; | |
987 | } | |
988 | ||
989 | ret = get_buffer_type(node_content); | |
990 | free(node_content); | |
991 | if (ret < 0) { | |
992 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
993 | goto end; | |
994 | } | |
995 | ||
996 | domain->buf_type = ret; | |
997 | } | |
998 | } | |
999 | ret = 0; | |
1000 | end: | |
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static | |
1005 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1006 | char **data_uri) | |
1007 | { | |
1008 | xmlNodePtr node; | |
1009 | ||
1010 | for (node = xmlFirstElementChild(net_output_node); node; | |
1011 | node = xmlNextElementSibling(node)) { | |
1012 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1013 | /* control_uri */ | |
1014 | *control_uri = (char *) xmlNodeGetContent(node); | |
1015 | if (!*control_uri) { | |
1016 | break; | |
1017 | } | |
1018 | } else { | |
1019 | /* data_uri */ | |
1020 | *data_uri = (char *) xmlNodeGetContent(node); | |
1021 | if (!*data_uri) { | |
1022 | break; | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1028 | } | |
1029 | ||
1030 | static | |
1031 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1032 | struct consumer_output *output) | |
1033 | { | |
1034 | int ret; | |
1035 | xmlNodePtr node; | |
1036 | ||
1037 | assert(output); | |
1038 | ||
1039 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1040 | node = xmlNextElementSibling(node)) { | |
1041 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1042 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1043 | ||
1044 | /* enabled */ | |
1045 | if (!enabled_str) { | |
1046 | ret = -LTTNG_ERR_NOMEM; | |
1047 | goto end; | |
1048 | } | |
1049 | ||
1050 | ret = parse_bool(enabled_str, &output->enabled); | |
1051 | free(enabled_str); | |
1052 | if (ret) { | |
1053 | goto end; | |
1054 | } | |
1055 | } else { | |
1056 | xmlNodePtr output_type_node; | |
1057 | ||
1058 | /* destination */ | |
1059 | output_type_node = xmlFirstElementChild(node); | |
1060 | if (!output_type_node) { | |
1061 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1062 | goto end; | |
1063 | } | |
1064 | ||
1065 | if (!strcmp((const char *) output_type_node->name, | |
1066 | config_element_path)) { | |
1067 | /* path */ | |
1068 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1069 | if (!output->path) { | |
1070 | ret = -LTTNG_ERR_NOMEM; | |
1071 | goto end; | |
1072 | } | |
1073 | } else { | |
1074 | /* net_output */ | |
1075 | ret = get_net_output_uris(output_type_node, | |
1076 | &output->control_uri, &output->data_uri); | |
1077 | if (ret) { | |
1078 | goto end; | |
1079 | } | |
1080 | } | |
1081 | } | |
1082 | } | |
1083 | ret = 0; | |
1084 | ||
1085 | end: | |
1086 | if (ret) { | |
1087 | free(output->path); | |
1088 | free(output->control_uri); | |
1089 | free(output->data_uri); | |
1090 | memset(output, 0, sizeof(struct consumer_output)); | |
1091 | } | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | static | |
1096 | int create_session_net_output(const char *name, struct lttng_domain *domain, | |
1097 | const char *control_uri, const char *data_uri) | |
1098 | { | |
1099 | int ret; | |
1100 | struct lttng_handle *handle; | |
1101 | const char *uri = NULL; | |
1102 | ||
1103 | assert(name); | |
1104 | assert(domain); | |
1105 | ||
1106 | handle = lttng_create_handle(name, domain); | |
1107 | if (!handle) { | |
1108 | ret = -LTTNG_ERR_NOMEM; | |
1109 | goto end; | |
1110 | } | |
1111 | ||
1112 | if (!control_uri || !data_uri) { | |
1113 | uri = control_uri ? control_uri : data_uri; | |
1114 | control_uri = uri; | |
1115 | data_uri = uri; | |
1116 | } | |
1117 | ||
1118 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1119 | lttng_destroy_handle(handle); | |
1120 | end: | |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | static | |
1125 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node) | |
1126 | { | |
1127 | int ret; | |
1128 | xmlNodePtr node = NULL; | |
1129 | xmlNodePtr snapshot_output_list_node; | |
1130 | xmlNodePtr snapshot_output_node; | |
1131 | ||
1132 | assert(session_name); | |
1133 | ||
1134 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1135 | if (ret) { | |
1136 | goto end; | |
1137 | } | |
1138 | ||
1139 | if (!output_node) { | |
1140 | goto end; | |
1141 | } | |
1142 | ||
1143 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1144 | ||
1145 | /* Parse and create snapshot outputs */ | |
1146 | ||
1147 | for (snapshot_output_node = | |
1148 | xmlFirstElementChild(snapshot_output_list_node); | |
1149 | snapshot_output_node; snapshot_output_node = | |
1150 | xmlNextElementSibling(snapshot_output_node)) { | |
1151 | char *name = NULL; | |
1152 | uint64_t max_size = UINT64_MAX; | |
1153 | struct consumer_output output = { 0 }; | |
1154 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1155 | ||
1156 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1157 | node = xmlNextElementSibling(node)) { | |
1158 | if (!strcmp((const char *) node->name, | |
1159 | config_element_name)) { | |
1160 | /* name */ | |
1161 | name = (char *) xmlNodeGetContent(node); | |
1162 | if (!name) { | |
1163 | ret = -LTTNG_ERR_NOMEM; | |
1164 | goto error_snapshot_output; | |
1165 | } | |
1166 | } else if (!strcmp((const char *) node->name, | |
1167 | config_element_max_size)) { | |
1168 | xmlChar *content = xmlNodeGetContent(node); | |
1169 | ||
1170 | /* max_size */ | |
1171 | if (!content) { | |
1172 | ret = -LTTNG_ERR_NOMEM; | |
1173 | goto error_snapshot_output; | |
1174 | } | |
1175 | ret = parse_uint(content, &max_size); | |
1176 | free(content); | |
1177 | if (ret) { | |
1178 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1179 | goto error_snapshot_output; | |
1180 | } | |
1181 | } else { | |
1182 | /* consumer_output */ | |
1183 | ret = process_consumer_output(node, &output); | |
1184 | if (ret) { | |
1185 | goto error_snapshot_output; | |
1186 | } | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | snapshot_output = lttng_snapshot_output_create(); | |
1191 | if (!snapshot_output) { | |
1192 | ret = -LTTNG_ERR_NOMEM; | |
1193 | goto error_snapshot_output; | |
1194 | } | |
1195 | ||
1196 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1197 | if (ret) { | |
1198 | goto error_snapshot_output; | |
1199 | } | |
1200 | ||
1201 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1202 | if (ret) { | |
1203 | goto error_snapshot_output; | |
1204 | } | |
1205 | ||
1206 | if (output.path) { | |
1207 | ret = lttng_snapshot_output_set_ctrl_url(output.path, | |
1208 | snapshot_output); | |
1209 | if (ret) { | |
1210 | goto error_snapshot_output; | |
1211 | } | |
1212 | } else { | |
1213 | if (output.control_uri) { | |
1214 | ret = lttng_snapshot_output_set_ctrl_url(output.control_uri, | |
1215 | snapshot_output); | |
1216 | if (ret) { | |
1217 | goto error_snapshot_output; | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | if (output.data_uri) { | |
1222 | ret = lttng_snapshot_output_set_data_url(output.data_uri, | |
1223 | snapshot_output); | |
1224 | if (ret) { | |
1225 | goto error_snapshot_output; | |
1226 | } | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1231 | error_snapshot_output: | |
1232 | free(name); | |
1233 | free(output.path); | |
1234 | free(output.control_uri); | |
1235 | free(output.data_uri); | |
1236 | lttng_snapshot_output_destroy(snapshot_output); | |
1237 | if (ret) { | |
1238 | goto end; | |
1239 | } | |
1240 | } | |
1241 | end: | |
1242 | return ret; | |
1243 | } | |
1244 | ||
1245 | static | |
1246 | int create_session(const char *name, | |
1247 | struct lttng_domain *kernel_domain, | |
1248 | struct lttng_domain *ust_domain, | |
1249 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1250 | struct lttng_domain *log4j_domain, |
dcf266c0 JG |
1251 | xmlNodePtr output_node, |
1252 | uint64_t live_timer_interval) | |
1253 | { | |
1254 | int ret; | |
1255 | struct consumer_output output = { 0 }; | |
1256 | xmlNodePtr consumer_output_node; | |
1257 | ||
1258 | assert(name); | |
dcf266c0 JG |
1259 | |
1260 | if (output_node) { | |
1261 | consumer_output_node = xmlFirstElementChild(output_node); | |
1262 | if (!consumer_output_node) { | |
1263 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1264 | goto end; | |
1265 | } | |
1266 | ||
1267 | if (strcmp((const char *) consumer_output_node->name, | |
1268 | config_element_consumer_output)) { | |
1269 | WARN("Invalid output type, expected %s node", | |
1270 | config_element_consumer_output); | |
1271 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1272 | goto end; | |
1273 | } | |
1274 | ||
1275 | ret = process_consumer_output(consumer_output_node, &output); | |
1276 | if (ret) { | |
1277 | goto end; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | if (live_timer_interval != UINT64_MAX && | |
1282 | !output.control_uri && !output.data_uri) { | |
1283 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1284 | goto end; | |
1285 | } | |
1286 | ||
1287 | if (output.control_uri || output.data_uri) { | |
1288 | int i; | |
1289 | struct lttng_domain *domain; | |
1290 | struct lttng_domain *domains[] = | |
c8c5f7ce | 1291 | { kernel_domain, ust_domain, jul_domain, log4j_domain }; |
dcf266c0 JG |
1292 | |
1293 | /* network destination */ | |
1294 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1295 | /* |
1296 | * URLs are provided for sure since the test above make sure that | |
1297 | * with a live timer the data and control URIs are provided. So, | |
1298 | * NULL is passed here and will be set right after. | |
1299 | */ | |
1300 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1301 | } else { |
1302 | ret = lttng_create_session(name, NULL); | |
1303 | } | |
1304 | if (ret) { | |
1305 | goto end; | |
1306 | } | |
1307 | ||
301423df | 1308 | for (i = 0; i < (sizeof(domains) / sizeof(domains[0])); i++) { |
dcf266c0 JG |
1309 | domain = domains[i]; |
1310 | if (!domain) { | |
1311 | continue; | |
1312 | } | |
1313 | ||
1314 | ret = create_session_net_output(name, domain, output.control_uri, | |
1315 | output.data_uri); | |
1316 | if (ret) { | |
1317 | goto end; | |
1318 | } | |
1319 | } | |
1320 | } else { | |
1321 | /* either local output or no output */ | |
1322 | ret = lttng_create_session(name, output.path); | |
1323 | if (ret) { | |
1324 | goto end; | |
1325 | } | |
1326 | } | |
1327 | end: | |
1328 | free(output.path); | |
1329 | free(output.control_uri); | |
1330 | free(output.data_uri); | |
1331 | return ret; | |
1332 | } | |
1333 | static | |
1334 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1335 | struct lttng_event_probe_attr *attr) | |
1336 | { | |
1337 | int ret; | |
1338 | ||
1339 | assert(probe_attribute_node); | |
1340 | assert(attr); | |
1341 | ||
1342 | if (!strcmp((const char *) probe_attribute_node->name, | |
1343 | config_element_address)) { | |
1344 | xmlChar *content; | |
1345 | uint64_t addr = 0; | |
1346 | ||
1347 | /* addr */ | |
1348 | content = xmlNodeGetContent(probe_attribute_node); | |
1349 | if (!content) { | |
1350 | ret = -LTTNG_ERR_NOMEM; | |
1351 | goto end; | |
1352 | } | |
1353 | ||
1354 | ret = parse_uint(content, &addr); | |
1355 | free(content); | |
1356 | if (ret) { | |
1357 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1358 | goto end; | |
1359 | } | |
1360 | ||
1361 | attr->addr = addr; | |
1362 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1363 | config_element_offset)) { | |
1364 | xmlChar *content; | |
1365 | uint64_t offset = 0; | |
1366 | ||
1367 | /* offset */ | |
1368 | content = xmlNodeGetContent(probe_attribute_node); | |
1369 | if (!content) { | |
1370 | ret = -LTTNG_ERR_NOMEM; | |
1371 | goto end; | |
1372 | } | |
1373 | ||
1374 | ret = parse_uint(content, &offset); | |
1375 | free(content); | |
1376 | if (ret) { | |
1377 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1378 | goto end; | |
1379 | } | |
1380 | ||
1381 | attr->offset = offset; | |
1382 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1383 | config_element_symbol_name)) { | |
1384 | xmlChar *content; | |
1385 | size_t name_len; | |
1386 | ||
1387 | /* symbol_name */ | |
1388 | content = xmlNodeGetContent(probe_attribute_node); | |
1389 | if (!content) { | |
1390 | ret = -LTTNG_ERR_NOMEM; | |
1391 | goto end; | |
1392 | } | |
1393 | ||
1394 | name_len = strlen((char *) content); | |
1395 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1396 | WARN("symbol_name too long."); | |
1397 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1398 | free(content); | |
1399 | goto end; | |
1400 | } | |
1401 | ||
1402 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1403 | free(content); | |
1404 | } | |
1405 | ret = 0; | |
1406 | end: | |
1407 | return ret; | |
1408 | } | |
1409 | ||
1410 | static | |
1411 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
1412 | const char *channel_name) | |
1413 | { | |
1414 | int ret, i; | |
1415 | xmlNodePtr node; | |
1416 | struct lttng_event event; | |
1417 | char **exclusions = NULL; | |
1418 | unsigned long exclusion_count = 0; | |
1419 | char *filter_expression = NULL; | |
1420 | ||
1421 | assert(event_node); | |
1422 | assert(handle); | |
1423 | assert(channel_name); | |
1424 | ||
1425 | memset(&event, 0, sizeof(event)); | |
1426 | ||
1427 | for (node = xmlFirstElementChild(event_node); node; | |
1428 | node = xmlNextElementSibling(node)) { | |
1429 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1430 | xmlChar *content; | |
1431 | size_t name_len; | |
1432 | ||
1433 | /* name */ | |
1434 | content = xmlNodeGetContent(node); | |
1435 | if (!content) { | |
1436 | ret = -LTTNG_ERR_NOMEM; | |
1437 | goto end; | |
1438 | } | |
1439 | ||
1440 | name_len = strlen((char *) content); | |
1441 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1442 | WARN("Channel name too long."); | |
1443 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1444 | free(content); | |
1445 | goto end; | |
1446 | } | |
1447 | ||
1448 | strncpy(event.name, (const char *) content, name_len); | |
1449 | free(content); | |
1450 | } else if (!strcmp((const char *) node->name, | |
1451 | config_element_enabled)) { | |
1452 | xmlChar *content = xmlNodeGetContent(node); | |
1453 | ||
1454 | /* enabled */ | |
1455 | if (!content) { | |
1456 | ret = -LTTNG_ERR_NOMEM; | |
1457 | goto end; | |
1458 | } | |
1459 | ||
1460 | ret = parse_bool(content, &event.enabled); | |
1461 | free(content); | |
1462 | if (ret) { | |
1463 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1464 | goto end; | |
1465 | } | |
1466 | } else if (!strcmp((const char *) node->name, | |
1467 | config_element_type)) { | |
1468 | xmlChar *content = xmlNodeGetContent(node); | |
1469 | ||
1470 | /* type */ | |
1471 | if (!content) { | |
1472 | ret = -LTTNG_ERR_NOMEM; | |
1473 | goto end; | |
1474 | } | |
1475 | ||
1476 | ret = get_event_type(content); | |
1477 | free(content); | |
1478 | if (ret < 0) { | |
1479 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1480 | goto end; | |
1481 | } | |
1482 | ||
1483 | event.type = ret; | |
1484 | } else if (!strcmp((const char *) node->name, | |
1485 | config_element_loglevel_type)) { | |
1486 | xmlChar *content = xmlNodeGetContent(node); | |
1487 | ||
1488 | /* loglevel_type */ | |
1489 | if (!content) { | |
1490 | ret = -LTTNG_ERR_NOMEM; | |
1491 | goto end; | |
1492 | } | |
1493 | ||
1494 | ret = get_loglevel_type(content); | |
1495 | free(content); | |
1496 | if (ret < 0) { | |
1497 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1498 | goto end; | |
1499 | } | |
1500 | ||
1501 | event.loglevel_type = ret; | |
1502 | } else if (!strcmp((const char *) node->name, | |
1503 | config_element_loglevel)) { | |
1504 | xmlChar *content; | |
1505 | int64_t loglevel = 0; | |
1506 | ||
1507 | /* loglevel */ | |
1508 | content = xmlNodeGetContent(node); | |
1509 | if (!content) { | |
1510 | ret = -LTTNG_ERR_NOMEM; | |
1511 | goto end; | |
1512 | } | |
1513 | ||
1514 | ret = parse_int(content, &loglevel); | |
1515 | free(content); | |
1516 | if (ret) { | |
1517 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1518 | goto end; | |
1519 | } | |
1520 | ||
1521 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1522 | WARN("loglevel out of range."); | |
1523 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1524 | goto end; | |
1525 | } | |
1526 | ||
1527 | event.loglevel = loglevel; | |
1528 | } else if (!strcmp((const char *) node->name, | |
1529 | config_element_filter)) { | |
1530 | xmlChar *content = | |
1531 | xmlNodeGetContent(node); | |
1532 | ||
1533 | /* filter */ | |
1534 | if (!content) { | |
1535 | ret = -LTTNG_ERR_NOMEM; | |
1536 | goto end; | |
1537 | } | |
1538 | ||
1539 | filter_expression = strdup((char *) content); | |
1540 | free(content); | |
1541 | if (!filter_expression) { | |
1542 | ret = -LTTNG_ERR_NOMEM; | |
1543 | goto end; | |
1544 | } | |
1545 | } else if (!strcmp((const char *) node->name, | |
1546 | config_element_exclusions)) { | |
1547 | xmlNodePtr exclusion_node; | |
1548 | int exclusion_index = 0; | |
1549 | ||
1550 | /* exclusions */ | |
1551 | if (exclusions) { | |
1552 | /* | |
1553 | * Exclusions has already been initialized, | |
1554 | * invalid file. | |
1555 | */ | |
1556 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1557 | goto end; | |
1558 | } | |
1559 | ||
1560 | exclusion_count = xmlChildElementCount(node); | |
1561 | if (!exclusion_count) { | |
1562 | continue; | |
1563 | } | |
1564 | ||
1565 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1566 | if (!exclusions) { | |
1567 | exclusion_count = 0; | |
1568 | ret = -LTTNG_ERR_NOMEM; | |
1569 | goto end; | |
1570 | } | |
1571 | ||
1572 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1573 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1574 | xmlChar *content = | |
1575 | xmlNodeGetContent(exclusion_node); | |
1576 | ||
1577 | if (!content) { | |
1578 | ret = -LTTNG_ERR_NOMEM; | |
1579 | goto end; | |
1580 | } | |
1581 | ||
1582 | exclusions[exclusion_index] = strdup((const char *) content); | |
1583 | free(content); | |
1584 | if (!exclusions[exclusion_index]) { | |
1585 | ret = -LTTNG_ERR_NOMEM; | |
1586 | goto end; | |
1587 | } | |
1588 | exclusion_index++; | |
1589 | } | |
1590 | ||
1591 | event.exclusion = 1; | |
1592 | } else if (!strcmp((const char *) node->name, | |
1593 | config_element_attributes)) { | |
1594 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1595 | ||
1596 | /* attributes */ | |
1597 | if (!attribute_node) { | |
1598 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1599 | goto end; | |
1600 | } | |
1601 | ||
1602 | if (!strcmp((const char *) node->name, | |
1603 | config_element_probe_attributes)) { | |
1604 | xmlNodePtr probe_attribute_node; | |
1605 | ||
1606 | /* probe_attributes */ | |
1607 | for (probe_attribute_node = | |
1608 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1609 | probe_attribute_node = xmlNextElementSibling( | |
1610 | probe_attribute_node)) { | |
1611 | ||
1612 | ret = process_probe_attribute_node(probe_attribute_node, | |
1613 | &event.attr.probe); | |
1614 | if (ret) { | |
1615 | goto end; | |
1616 | } | |
1617 | } | |
1618 | } else { | |
1619 | size_t sym_len; | |
1620 | xmlChar *content; | |
1621 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1622 | ||
1623 | /* function_attributes */ | |
1624 | content = xmlNodeGetContent(symbol_node); | |
1625 | if (!content) { | |
1626 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1627 | goto end; | |
1628 | } | |
1629 | ||
1630 | sym_len = strlen((char *) content); | |
1631 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1632 | WARN("Function name too long."); | |
1633 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1634 | free(content); | |
1635 | goto end; | |
1636 | } | |
1637 | ||
1638 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1639 | sym_len); | |
1640 | free(content); | |
1641 | } | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1646 | filter_expression, exclusion_count, exclusions); | |
065321e9 JG |
1647 | if (ret) { |
1648 | goto end; | |
1649 | } | |
1650 | ||
1651 | if (!event.enabled) { | |
1652 | /* | |
1653 | * Note that we should use lttng_disable_event_ext() (2.6+) to | |
1654 | * eliminate the risk of clashing on events of the same | |
1655 | * name (with different event types and loglevels). | |
1656 | * | |
1657 | * Unfortunately, lttng_disable_event_ext() only performs a | |
1658 | * match on the name and event type and errors out if any other | |
1659 | * event attribute is not set to its default value. | |
1660 | * | |
1661 | * This will disable all events that match this name. | |
1662 | */ | |
1663 | ret = lttng_disable_event(handle, event.name, channel_name); | |
1664 | } | |
dcf266c0 JG |
1665 | end: |
1666 | for (i = 0; i < exclusion_count; i++) { | |
1667 | free(exclusions[i]); | |
1668 | } | |
1669 | ||
1670 | free(exclusions); | |
1671 | free(filter_expression); | |
1672 | return ret; | |
1673 | } | |
1674 | ||
1675 | static | |
1676 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1677 | const char *channel_name) | |
1678 | { | |
1679 | int ret = 0; | |
1680 | xmlNodePtr node; | |
1681 | ||
1682 | assert(events_node); | |
1683 | assert(handle); | |
1684 | assert(channel_name); | |
1685 | ||
1686 | for (node = xmlFirstElementChild(events_node); node; | |
1687 | node = xmlNextElementSibling(node)) { | |
1688 | ret = process_event_node(node, handle, channel_name); | |
1689 | if (ret) { | |
1690 | goto end; | |
1691 | } | |
1692 | } | |
1693 | end: | |
1694 | return ret; | |
1695 | } | |
1696 | ||
1697 | static | |
1698 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1699 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1700 | xmlNodePtr *events_node) | |
1701 | { | |
1702 | int ret; | |
1703 | ||
1704 | assert(attr_node); | |
1705 | assert(channel); | |
1706 | assert(contexts_node); | |
1707 | assert(events_node); | |
1708 | ||
1709 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1710 | xmlChar *content; | |
1711 | size_t name_len; | |
1712 | ||
1713 | /* name */ | |
1714 | content = xmlNodeGetContent(attr_node); | |
1715 | if (!content) { | |
1716 | ret = -LTTNG_ERR_NOMEM; | |
1717 | goto end; | |
1718 | } | |
1719 | ||
1720 | name_len = strlen((char *) content); | |
1721 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1722 | WARN("Channel name too long."); | |
1723 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1724 | free(content); | |
1725 | goto end; | |
1726 | } | |
1727 | ||
1728 | strncpy(channel->name, (const char *) content, name_len); | |
1729 | free(content); | |
1730 | } else if (!strcmp((const char *) attr_node->name, | |
1731 | config_element_enabled)) { | |
1732 | xmlChar *content; | |
1733 | int enabled; | |
1734 | ||
1735 | /* enabled */ | |
1736 | content = xmlNodeGetContent(attr_node); | |
1737 | if (!content) { | |
1738 | ret = -LTTNG_ERR_NOMEM; | |
1739 | goto end; | |
1740 | } | |
1741 | ||
1742 | ret = parse_bool(content, &enabled); | |
1743 | free(content); | |
1744 | if (ret) { | |
1745 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1746 | goto end; | |
1747 | } | |
1748 | ||
1749 | channel->enabled = enabled; | |
1750 | } else if (!strcmp((const char *) attr_node->name, | |
1751 | config_element_overwrite_mode)) { | |
1752 | xmlChar *content; | |
1753 | ||
1754 | /* overwrite_mode */ | |
1755 | content = xmlNodeGetContent(attr_node); | |
1756 | if (!content) { | |
1757 | ret = -LTTNG_ERR_NOMEM; | |
1758 | goto end; | |
1759 | } | |
1760 | ||
1761 | ret = get_overwrite_mode(content); | |
1762 | free(content); | |
1763 | if (ret < 0) { | |
1764 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1765 | goto end; | |
1766 | } | |
1767 | ||
1768 | channel->attr.overwrite = ret; | |
1769 | } else if (!strcmp((const char *) attr_node->name, | |
1770 | config_element_subbuf_size)) { | |
1771 | xmlChar *content; | |
1772 | ||
1773 | /* subbuffer_size */ | |
1774 | content = xmlNodeGetContent(attr_node); | |
1775 | if (!content) { | |
1776 | ret = -LTTNG_ERR_NOMEM; | |
1777 | goto end; | |
1778 | } | |
1779 | ||
1780 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1781 | free(content); | |
1782 | if (ret) { | |
1783 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1784 | goto end; | |
1785 | } | |
1786 | } else if (!strcmp((const char *) attr_node->name, | |
1787 | config_element_num_subbuf)) { | |
1788 | xmlChar *content; | |
1789 | ||
1790 | /* subbuffer_count */ | |
1791 | content = xmlNodeGetContent(attr_node); | |
1792 | if (!content) { | |
1793 | ret = -LTTNG_ERR_NOMEM; | |
1794 | goto end; | |
1795 | } | |
1796 | ||
1797 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1798 | free(content); | |
1799 | if (ret) { | |
1800 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1801 | goto end; | |
1802 | } | |
1803 | } else if (!strcmp((const char *) attr_node->name, | |
1804 | config_element_switch_timer_interval)) { | |
1805 | xmlChar *content; | |
1806 | uint64_t switch_timer_interval = 0; | |
1807 | ||
1808 | /* switch_timer_interval */ | |
1809 | content = xmlNodeGetContent(attr_node); | |
1810 | if (!content) { | |
1811 | ret = -LTTNG_ERR_NOMEM; | |
1812 | goto end; | |
1813 | } | |
1814 | ||
1815 | ret = parse_uint(content, &switch_timer_interval); | |
1816 | free(content); | |
1817 | if (ret) { | |
1818 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1819 | goto end; | |
1820 | } | |
1821 | ||
1822 | if (switch_timer_interval > UINT_MAX) { | |
1823 | WARN("switch_timer_interval out of range."); | |
1824 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1825 | goto end; | |
1826 | } | |
1827 | ||
1828 | channel->attr.switch_timer_interval = | |
1829 | switch_timer_interval; | |
1830 | } else if (!strcmp((const char *) attr_node->name, | |
1831 | config_element_read_timer_interval)) { | |
1832 | xmlChar *content; | |
1833 | uint64_t read_timer_interval = 0; | |
1834 | ||
1835 | /* read_timer_interval */ | |
1836 | content = xmlNodeGetContent(attr_node); | |
1837 | if (!content) { | |
1838 | ret = -LTTNG_ERR_NOMEM; | |
1839 | goto end; | |
1840 | } | |
1841 | ||
1842 | ret = parse_uint(content, &read_timer_interval); | |
1843 | free(content); | |
1844 | if (ret) { | |
1845 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1846 | goto end; | |
1847 | } | |
1848 | ||
1849 | if (read_timer_interval > UINT_MAX) { | |
1850 | WARN("read_timer_interval out of range."); | |
1851 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1852 | goto end; | |
1853 | } | |
1854 | ||
1855 | channel->attr.read_timer_interval = | |
1856 | read_timer_interval; | |
1857 | } else if (!strcmp((const char *) attr_node->name, | |
1858 | config_element_output_type)) { | |
1859 | xmlChar *content; | |
1860 | ||
1861 | /* output_type */ | |
1862 | content = xmlNodeGetContent(attr_node); | |
1863 | if (!content) { | |
1864 | ret = -LTTNG_ERR_NOMEM; | |
1865 | goto end; | |
1866 | } | |
1867 | ||
1868 | ret = get_output_type(content); | |
1869 | free(content); | |
1870 | if (ret < 0) { | |
1871 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1872 | goto end; | |
1873 | } | |
1874 | ||
1875 | channel->attr.output = ret; | |
1876 | } else if (!strcmp((const char *) attr_node->name, | |
1877 | config_element_tracefile_size)) { | |
1878 | xmlChar *content; | |
1879 | ||
1880 | /* tracefile_size */ | |
1881 | content = xmlNodeGetContent(attr_node); | |
1882 | if (!content) { | |
1883 | ret = -LTTNG_ERR_NOMEM; | |
1884 | goto end; | |
1885 | } | |
1886 | ||
1887 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
1888 | free(content); | |
1889 | if (ret) { | |
1890 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1891 | goto end; | |
1892 | } | |
1893 | } else if (!strcmp((const char *) attr_node->name, | |
1894 | config_element_tracefile_count)) { | |
1895 | xmlChar *content; | |
1896 | ||
1897 | /* tracefile_count */ | |
1898 | content = xmlNodeGetContent(attr_node); | |
1899 | if (!content) { | |
1900 | ret = -LTTNG_ERR_NOMEM; | |
1901 | goto end; | |
1902 | } | |
1903 | ||
1904 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
1905 | free(content); | |
1906 | if (ret) { | |
1907 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1908 | goto end; | |
1909 | } | |
1910 | } else if (!strcmp((const char *) attr_node->name, | |
1911 | config_element_live_timer_interval)) { | |
1912 | xmlChar *content; | |
1913 | uint64_t live_timer_interval = 0; | |
1914 | ||
1915 | /* live_timer_interval */ | |
1916 | content = xmlNodeGetContent(attr_node); | |
1917 | if (!content) { | |
1918 | ret = -LTTNG_ERR_NOMEM; | |
1919 | goto end; | |
1920 | } | |
1921 | ||
1922 | ret = parse_uint(content, &live_timer_interval); | |
1923 | free(content); | |
1924 | if (ret) { | |
1925 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1926 | goto end; | |
1927 | } | |
1928 | ||
1929 | if (live_timer_interval > UINT_MAX) { | |
1930 | WARN("live_timer_interval out of range."); | |
1931 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1932 | goto end; | |
1933 | } | |
1934 | ||
1935 | channel->attr.live_timer_interval = | |
1936 | live_timer_interval; | |
1937 | } else if (!strcmp((const char *) attr_node->name, | |
1938 | config_element_events)) { | |
1939 | /* events */ | |
1940 | *events_node = attr_node; | |
1941 | } else { | |
1942 | /* contexts */ | |
1943 | *contexts_node = attr_node; | |
1944 | } | |
1945 | ret = 0; | |
1946 | end: | |
1947 | return ret; | |
1948 | } | |
1949 | ||
1950 | static | |
1951 | int process_context_node(xmlNodePtr context_node, | |
1952 | struct lttng_handle *handle, const char *channel_name) | |
1953 | { | |
1954 | int ret; | |
1955 | struct lttng_event_context context; | |
1956 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
1957 | ||
1958 | assert(handle); | |
1959 | assert(channel_name); | |
1960 | ||
1961 | if (!context_child_node) { | |
1962 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1963 | goto end; | |
1964 | } | |
1965 | ||
1966 | memset(&context, 0, sizeof(context)); | |
1967 | ||
1968 | if (!strcmp((const char *) context_child_node->name, | |
1969 | config_element_type)) { | |
1970 | /* type */ | |
1971 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
1972 | if (!content) { | |
1973 | ret = -LTTNG_ERR_NOMEM; | |
1974 | goto end; | |
1975 | } | |
1976 | ||
1977 | ret = get_context_type(content); | |
1978 | free(content); | |
1979 | if (ret < 0) { | |
1980 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1981 | goto end; | |
1982 | } | |
1983 | ||
1984 | context.ctx = ret; | |
1985 | } else { | |
1986 | xmlNodePtr perf_attr_node; | |
1987 | ||
1988 | /* perf */ | |
14ce5bd8 JG |
1989 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
1990 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
1991 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
1992 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
1993 | perf_attr_node; perf_attr_node = | |
1994 | xmlNextElementSibling(perf_attr_node)) { | |
1995 | if (!strcmp((const char *) perf_attr_node->name, | |
1996 | config_element_type)) { | |
1997 | xmlChar *content; | |
1998 | uint64_t type = 0; | |
1999 | ||
2000 | /* type */ | |
2001 | content = xmlNodeGetContent(perf_attr_node); | |
2002 | if (!content) { | |
2003 | ret = -LTTNG_ERR_NOMEM; | |
2004 | goto end; | |
2005 | } | |
2006 | ||
2007 | ret = parse_uint(content, &type); | |
2008 | free(content); | |
2009 | if (ret) { | |
2010 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2011 | goto end; | |
2012 | } | |
2013 | ||
2014 | if (type > UINT32_MAX) { | |
2015 | WARN("perf context type out of range."); | |
2016 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2017 | goto end; | |
2018 | } | |
2019 | ||
2020 | context.u.perf_counter.type = type; | |
2021 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2022 | config_element_config)) { | |
2023 | xmlChar *content; | |
2024 | uint64_t config = 0; | |
2025 | ||
2026 | /* config */ | |
2027 | content = xmlNodeGetContent(perf_attr_node); | |
2028 | if (!content) { | |
2029 | ret = -LTTNG_ERR_NOMEM; | |
2030 | goto end; | |
2031 | } | |
2032 | ||
2033 | ret = parse_uint(content, &config); | |
2034 | free(content); | |
2035 | if (ret) { | |
2036 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2037 | goto end; | |
2038 | } | |
2039 | ||
2040 | context.u.perf_counter.config = config; | |
2041 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2042 | config_element_name)) { | |
2043 | xmlChar *content; | |
2044 | size_t name_len; | |
2045 | ||
2046 | /* name */ | |
2047 | content = xmlNodeGetContent(perf_attr_node); | |
2048 | if (!content) { | |
2049 | ret = -LTTNG_ERR_NOMEM; | |
2050 | goto end; | |
2051 | } | |
2052 | ||
2053 | name_len = strlen((char *) content); | |
2054 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2055 | WARN("perf context name too long."); | |
2056 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2057 | free(content); | |
2058 | goto end; | |
2059 | } | |
2060 | ||
2061 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2062 | name_len); | |
2063 | free(content); | |
2064 | } | |
2065 | } | |
2066 | } | |
2067 | ||
2068 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
2069 | end: | |
2070 | return ret; | |
2071 | } | |
2072 | ||
2073 | static | |
2074 | int process_contexts_node(xmlNodePtr contexts_node, | |
2075 | struct lttng_handle *handle, const char *channel_name) | |
2076 | { | |
2077 | int ret = 0; | |
2078 | xmlNodePtr context_node; | |
2079 | ||
2080 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2081 | context_node = xmlNextElementSibling(context_node)) { | |
2082 | ret = process_context_node(context_node, handle, channel_name); | |
2083 | if (ret) { | |
2084 | goto end; | |
2085 | } | |
2086 | } | |
2087 | end: | |
2088 | return ret; | |
2089 | } | |
2090 | ||
2091 | static | |
2092 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2093 | { | |
2094 | int ret; | |
2095 | struct lttng_domain domain = { 0 }; | |
2096 | struct lttng_handle *handle = NULL; | |
2097 | xmlNodePtr channels_node = NULL; | |
2098 | xmlNodePtr node; | |
2099 | ||
2100 | assert(session_name); | |
2101 | ||
2102 | ret = init_domain(domain_node, &domain); | |
2103 | if (ret) { | |
2104 | goto end; | |
2105 | } | |
2106 | ||
2107 | handle = lttng_create_handle(session_name, &domain); | |
2108 | if (!handle) { | |
2109 | ret = -LTTNG_ERR_NOMEM; | |
2110 | goto end; | |
2111 | } | |
2112 | ||
2113 | /* get the channels node */ | |
2114 | for (node = xmlFirstElementChild(domain_node); node; | |
2115 | node = xmlNextElementSibling(node)) { | |
2116 | if (!strcmp((const char *) node->name, | |
2117 | config_element_channels)) { | |
2118 | channels_node = node; | |
2119 | break; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | if (!channels_node) { | |
2124 | goto end; | |
2125 | } | |
2126 | ||
2127 | /* create all channels */ | |
2128 | for (node = xmlFirstElementChild(channels_node); node; | |
2129 | node = xmlNextElementSibling(node)) { | |
2130 | struct lttng_channel channel; | |
2131 | xmlNodePtr contexts_node = NULL; | |
2132 | xmlNodePtr events_node = NULL; | |
2133 | xmlNodePtr channel_attr_node; | |
2134 | ||
2135 | memset(&channel, 0, sizeof(channel)); | |
2136 | lttng_channel_set_default_attr(&domain, &channel.attr); | |
2137 | ||
2138 | for (channel_attr_node = xmlFirstElementChild(node); | |
2139 | channel_attr_node; channel_attr_node = | |
2140 | xmlNextElementSibling(channel_attr_node)) { | |
2141 | ret = process_channel_attr_node(channel_attr_node, | |
2142 | &channel, &contexts_node, &events_node); | |
2143 | if (ret) { | |
2144 | goto end; | |
2145 | } | |
2146 | } | |
2147 | ||
2148 | ret = lttng_enable_channel(handle, &channel); | |
2149 | if (ret < 0) { | |
2150 | goto end; | |
2151 | } | |
2152 | ||
2153 | ret = process_events_node(events_node, handle, channel.name); | |
2154 | if (ret) { | |
2155 | goto end; | |
2156 | } | |
2157 | ||
2158 | ret = process_contexts_node(contexts_node, handle, | |
2159 | channel.name); | |
2160 | if (ret) { | |
2161 | goto end; | |
2162 | } | |
2163 | } | |
2164 | end: | |
2165 | lttng_destroy_handle(handle); | |
2166 | return ret; | |
2167 | } | |
2168 | ||
2169 | static | |
2170 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
2171 | int override) | |
2172 | { | |
2173 | int ret, started = -1, snapshot_mode = -1; | |
2174 | uint64_t live_timer_interval = UINT64_MAX; | |
d324faf7 | 2175 | xmlChar *name = NULL; |
9e7c9f56 | 2176 | xmlChar *shm_path = NULL; |
dcf266c0 JG |
2177 | xmlNodePtr domains_node = NULL; |
2178 | xmlNodePtr output_node = NULL; | |
2179 | xmlNodePtr node; | |
2180 | struct lttng_domain *kernel_domain = NULL; | |
2181 | struct lttng_domain *ust_domain = NULL; | |
2182 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2183 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 2184 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
2185 | |
2186 | for (node = xmlFirstElementChild(session_node); node; | |
2187 | node = xmlNextElementSibling(node)) { | |
2188 | if (!name && !strcmp((const char *) node->name, | |
2189 | config_element_name)) { | |
2190 | /* name */ | |
2191 | xmlChar *node_content = xmlNodeGetContent(node); | |
2192 | if (!node_content) { | |
2193 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2194 | goto error; |
dcf266c0 JG |
2195 | } |
2196 | ||
d324faf7 | 2197 | name = node_content; |
dcf266c0 JG |
2198 | } else if (!domains_node && !strcmp((const char *) node->name, |
2199 | config_element_domains)) { | |
2200 | /* domains */ | |
2201 | domains_node = node; | |
2202 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2203 | config_element_started)) { | |
2204 | /* started */ | |
2205 | xmlChar *node_content = xmlNodeGetContent(node); | |
2206 | if (!node_content) { | |
2207 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2208 | goto error; |
dcf266c0 JG |
2209 | } |
2210 | ||
2211 | ret = parse_bool(node_content, &started); | |
2212 | free(node_content); | |
2213 | if (ret) { | |
2214 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2215 | goto error; |
dcf266c0 JG |
2216 | } |
2217 | } else if (!output_node && !strcmp((const char *) node->name, | |
2218 | config_element_output)) { | |
2219 | /* output */ | |
2220 | output_node = node; | |
9e7c9f56 JR |
2221 | } else if (!shm_path && !strcmp((const char *) node->name, |
2222 | config_element_shared_memory_path)) { | |
2223 | /* shared memory path */ | |
2224 | xmlChar *node_content = xmlNodeGetContent(node); | |
2225 | if (!node_content) { | |
2226 | ret = -LTTNG_ERR_NOMEM; | |
2227 | goto error; | |
2228 | } | |
2229 | ||
2230 | shm_path = node_content; | |
dcf266c0 JG |
2231 | } else { |
2232 | /* attributes, snapshot_mode or live_timer_interval */ | |
2233 | xmlNodePtr attributes_child = | |
2234 | xmlFirstElementChild(node); | |
2235 | ||
2236 | if (!strcmp((const char *) attributes_child->name, | |
2237 | config_element_snapshot_mode)) { | |
2238 | /* snapshot_mode */ | |
2239 | xmlChar *snapshot_mode_content = | |
2240 | xmlNodeGetContent(attributes_child); | |
2241 | if (!snapshot_mode_content) { | |
2242 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2243 | goto error; |
dcf266c0 JG |
2244 | } |
2245 | ||
2246 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2247 | free(snapshot_mode_content); | |
2248 | if (ret) { | |
2249 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2250 | goto error; |
dcf266c0 JG |
2251 | } |
2252 | } else { | |
2253 | /* live_timer_interval */ | |
2254 | xmlChar *timer_interval_content = | |
2255 | xmlNodeGetContent(attributes_child); | |
2256 | if (!timer_interval_content) { | |
2257 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2258 | goto error; |
dcf266c0 JG |
2259 | } |
2260 | ||
2261 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2262 | free(timer_interval_content); | |
2263 | if (ret) { | |
2264 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2265 | goto error; |
dcf266c0 JG |
2266 | } |
2267 | } | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | if (!name) { | |
2272 | /* Mandatory attribute, as defined in the session XSD */ | |
2273 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2274 | goto error; |
dcf266c0 JG |
2275 | } |
2276 | ||
d324faf7 | 2277 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 2278 | /* This is not the session we are looking for */ |
c2da8cde DG |
2279 | ret = -LTTNG_ERR_NO_SESSION; |
2280 | goto error; | |
dcf266c0 JG |
2281 | } |
2282 | ||
2283 | /* Init domains to create the session handles */ | |
2284 | for (node = xmlFirstElementChild(domains_node); node; | |
2285 | node = xmlNextElementSibling(node)) { | |
2286 | struct lttng_domain *domain; | |
2287 | ||
2288 | domain = zmalloc(sizeof(*domain)); | |
2289 | if (!domain) { | |
2290 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2291 | goto error; |
dcf266c0 JG |
2292 | } |
2293 | ||
2294 | ret = init_domain(node, domain); | |
2295 | if (ret) { | |
2296 | goto domain_init_error; | |
2297 | } | |
2298 | ||
2299 | switch (domain->type) { | |
2300 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2301 | if (kernel_domain) { |
2302 | /* Same domain seen twice, invalid! */ | |
2303 | goto domain_init_error; | |
2304 | } | |
dcf266c0 JG |
2305 | kernel_domain = domain; |
2306 | break; | |
2307 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2308 | if (ust_domain) { |
2309 | /* Same domain seen twice, invalid! */ | |
2310 | goto domain_init_error; | |
2311 | } | |
dcf266c0 JG |
2312 | ust_domain = domain; |
2313 | break; | |
2314 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2315 | if (jul_domain) { |
2316 | /* Same domain seen twice, invalid! */ | |
2317 | goto domain_init_error; | |
2318 | } | |
dcf266c0 JG |
2319 | jul_domain = domain; |
2320 | break; | |
5cdb6027 DG |
2321 | case LTTNG_DOMAIN_LOG4J: |
2322 | if (log4j_domain) { | |
2323 | /* Same domain seen twice, invalid! */ | |
2324 | goto domain_init_error; | |
2325 | } | |
2326 | log4j_domain = domain; | |
2327 | break; | |
0e115563 DG |
2328 | case LTTNG_DOMAIN_PYTHON: |
2329 | if (python_domain) { | |
2330 | /* Same domain seen twice, invalid! */ | |
2331 | goto domain_init_error; | |
2332 | } | |
2333 | python_domain = domain; | |
2334 | break; | |
dcf266c0 JG |
2335 | default: |
2336 | WARN("Invalid domain type"); | |
2337 | goto domain_init_error; | |
2338 | } | |
2339 | continue; | |
2340 | domain_init_error: | |
2341 | free(domain); | |
2342 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2343 | goto error; |
dcf266c0 JG |
2344 | } |
2345 | ||
2346 | if (override) { | |
2347 | /* Destroy session if it exists */ | |
d324faf7 | 2348 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
2349 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
2350 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2351 | goto error; |
dcf266c0 JG |
2352 | } |
2353 | } | |
2354 | ||
2355 | /* Create session type depending on output type */ | |
2356 | if (snapshot_mode && snapshot_mode != -1) { | |
d324faf7 | 2357 | ret = create_snapshot_session((const char *) name, output_node); |
dcf266c0 JG |
2358 | } else if (live_timer_interval && |
2359 | live_timer_interval != UINT64_MAX) { | |
d324faf7 JG |
2360 | ret = create_session((const char *) name, kernel_domain, |
2361 | ust_domain, jul_domain, log4j_domain, | |
2362 | output_node, live_timer_interval); | |
dcf266c0 JG |
2363 | } else { |
2364 | /* regular session */ | |
d324faf7 JG |
2365 | ret = create_session((const char *) name, kernel_domain, |
2366 | ust_domain, jul_domain, log4j_domain, | |
2367 | output_node, UINT64_MAX); | |
dcf266c0 | 2368 | } |
dcf266c0 | 2369 | if (ret) { |
c2da8cde | 2370 | goto error; |
dcf266c0 JG |
2371 | } |
2372 | ||
9e7c9f56 JR |
2373 | if (shm_path) { |
2374 | ret = lttng_set_session_shm_path((const char *) name, | |
d324faf7 | 2375 | (const char *) shm_path); |
9e7c9f56 JR |
2376 | if (ret) { |
2377 | goto error; | |
2378 | } | |
2379 | } | |
2380 | ||
dcf266c0 JG |
2381 | for (node = xmlFirstElementChild(domains_node); node; |
2382 | node = xmlNextElementSibling(node)) { | |
d324faf7 | 2383 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
2384 | if (ret) { |
2385 | goto end; | |
2386 | } | |
2387 | } | |
2388 | ||
2389 | if (started) { | |
d324faf7 | 2390 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
2391 | if (ret) { |
2392 | goto end; | |
2393 | } | |
2394 | } | |
c2da8cde | 2395 | |
dcf266c0 | 2396 | end: |
b2579dc1 | 2397 | if (ret < 0) { |
d324faf7 JG |
2398 | ERR("Failed to load session %s: %s", (const char *) name, |
2399 | lttng_strerror(ret)); | |
2400 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
2401 | } |
2402 | ||
c2da8cde | 2403 | error: |
dcf266c0 JG |
2404 | free(kernel_domain); |
2405 | free(ust_domain); | |
2406 | free(jul_domain); | |
5cdb6027 | 2407 | free(log4j_domain); |
135a3893 | 2408 | free(python_domain); |
d324faf7 | 2409 | xmlFree(name); |
9e7c9f56 | 2410 | xmlFree(shm_path); |
dcf266c0 JG |
2411 | return ret; |
2412 | } | |
2413 | ||
cf53c06d DG |
2414 | /* |
2415 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2416 | * Return -1 if the path is EPERM. | |
2417 | */ | |
2418 | static int validate_file_read_creds(const char *path) | |
2419 | { | |
2420 | int ret; | |
2421 | ||
2422 | assert(path); | |
2423 | ||
2424 | /* Can we read the file. */ | |
2425 | ret = access(path, R_OK); | |
2426 | if (!ret) { | |
2427 | goto valid; | |
2428 | } | |
2429 | if (errno == EACCES) { | |
2430 | return -1; | |
2431 | } else { | |
2432 | /* Invalid. */ | |
2433 | return 0; | |
2434 | } | |
2435 | valid: | |
2436 | return 1; | |
2437 | } | |
2438 | ||
dcf266c0 JG |
2439 | static |
2440 | int load_session_from_file(const char *path, const char *session_name, | |
2441 | struct session_config_validation_ctx *validation_ctx, int override) | |
2442 | { | |
2443 | int ret, session_found = !session_name; | |
2444 | xmlDocPtr doc = NULL; | |
2445 | xmlNodePtr sessions_node; | |
2446 | xmlNodePtr session_node; | |
dcf266c0 JG |
2447 | |
2448 | assert(path); | |
2449 | assert(validation_ctx); | |
2450 | ||
cf53c06d DG |
2451 | ret = validate_file_read_creds(path); |
2452 | if (ret != 1) { | |
2453 | if (ret == -1) { | |
2454 | ret = -LTTNG_ERR_EPERM; | |
2455 | } else { | |
2456 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2457 | } | |
dcf266c0 JG |
2458 | goto end; |
2459 | } | |
2460 | ||
2461 | doc = xmlParseFile(path); | |
2462 | if (!doc) { | |
2463 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2464 | goto end; | |
2465 | } | |
2466 | ||
2467 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2468 | if (ret) { | |
2469 | ERR("Session configuration file validation failed"); | |
2470 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2471 | goto end; | |
2472 | } | |
2473 | ||
2474 | sessions_node = xmlDocGetRootElement(doc); | |
2475 | if (!sessions_node) { | |
2476 | goto end; | |
2477 | } | |
2478 | ||
2479 | for (session_node = xmlFirstElementChild(sessions_node); | |
2480 | session_node; session_node = | |
2481 | xmlNextElementSibling(session_node)) { | |
2482 | ret = process_session_node(session_node, | |
2483 | session_name, override); | |
2484 | if (session_name && ret == 0) { | |
2485 | /* Target session found and loaded */ | |
2486 | session_found = 1; | |
2487 | break; | |
2488 | } | |
2489 | } | |
2490 | end: | |
2491 | xmlFreeDoc(doc); | |
2492 | if (!ret) { | |
a96bc65d | 2493 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2494 | } |
2495 | return ret; | |
2496 | } | |
2497 | ||
60f70355 JG |
2498 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
2499 | static | |
2500 | struct dirent *alloc_dirent(const char *path) | |
2501 | { | |
2502 | size_t len; | |
2503 | long name_max; | |
2504 | struct dirent *entry; | |
2505 | ||
2506 | name_max = pathconf(path, _PC_NAME_MAX); | |
2507 | if (name_max == -1) { | |
2508 | name_max = PATH_MAX; | |
2509 | } | |
2510 | len = offsetof(struct dirent, d_name) + name_max + 1; | |
2511 | entry = zmalloc(len); | |
2512 | return entry; | |
2513 | } | |
2514 | ||
dcf266c0 JG |
2515 | static |
2516 | int load_session_from_path(const char *path, const char *session_name, | |
2517 | struct session_config_validation_ctx *validation_ctx, int override) | |
2518 | { | |
2519 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2520 | DIR *directory = NULL; |
2521 | ||
2522 | assert(path); | |
2523 | assert(validation_ctx); | |
2524 | ||
4af16958 DG |
2525 | directory = opendir(path); |
2526 | if (!directory) { | |
11143783 DG |
2527 | switch (errno) { |
2528 | case ENOTDIR: | |
0f0a81b5 DG |
2529 | /* Try the file loading. */ |
2530 | break; | |
11143783 DG |
2531 | case ENOENT: |
2532 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2533 | goto end; | |
2534 | default: | |
0f0a81b5 DG |
2535 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2536 | goto end; | |
4af16958 | 2537 | } |
dcf266c0 | 2538 | } |
4af16958 | 2539 | if (directory) { |
dcf266c0 JG |
2540 | struct dirent *entry; |
2541 | struct dirent *result; | |
2542 | char *file_path = NULL; | |
2543 | size_t path_len = strlen(path); | |
2544 | ||
2545 | if (path_len >= PATH_MAX) { | |
2546 | ret = -LTTNG_ERR_INVALID; | |
2547 | goto end; | |
2548 | } | |
2549 | ||
60f70355 | 2550 | entry = alloc_dirent(path); |
dcf266c0 JG |
2551 | if (!entry) { |
2552 | ret = -LTTNG_ERR_NOMEM; | |
2553 | goto end; | |
2554 | } | |
2555 | ||
dcf266c0 JG |
2556 | file_path = zmalloc(PATH_MAX); |
2557 | if (!file_path) { | |
2558 | ret = -LTTNG_ERR_NOMEM; | |
2559 | free(entry); | |
2560 | goto end; | |
2561 | } | |
2562 | ||
2563 | strncpy(file_path, path, path_len); | |
2564 | if (file_path[path_len - 1] != '/') { | |
2565 | file_path[path_len++] = '/'; | |
2566 | } | |
2567 | ||
4af16958 | 2568 | ret = 0; |
dcf266c0 JG |
2569 | /* Search for *.lttng files */ |
2570 | while (!readdir_r(directory, entry, &result) && result) { | |
2571 | size_t file_name_len = strlen(result->d_name); | |
2572 | ||
2573 | if (file_name_len <= | |
2574 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2575 | continue; | |
2576 | } | |
2577 | ||
431f702e | 2578 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2579 | continue; |
2580 | } | |
2581 | ||
2582 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2583 | result->d_name + file_name_len - sizeof( | |
2584 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2585 | continue; | |
2586 | } | |
2587 | ||
2588 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2589 | file_path[path_len + file_name_len] = '\0'; | |
2590 | ||
2591 | ret = load_session_from_file(file_path, session_name, | |
2592 | validation_ctx, override); | |
2593 | if (session_name && !ret) { | |
2594 | session_found = 1; | |
2595 | break; | |
2596 | } | |
2597 | } | |
2598 | ||
2599 | free(entry); | |
2600 | free(file_path); | |
2601 | } else { | |
2602 | ret = load_session_from_file(path, session_name, | |
2603 | validation_ctx, override); | |
2604 | if (ret) { | |
2605 | goto end; | |
2606 | } else { | |
2607 | session_found = 1; | |
2608 | } | |
2609 | } | |
2610 | ||
2611 | end: | |
2612 | if (directory) { | |
2613 | if (closedir(directory)) { | |
2614 | PERROR("closedir"); | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | if (!session_found) { | |
a96bc65d | 2619 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2620 | } |
2621 | ||
2622 | return ret; | |
2623 | } | |
2624 | ||
ab38c13f DG |
2625 | /* |
2626 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 2627 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
2628 | */ |
2629 | static int validate_path_creds(const char *path) | |
2630 | { | |
2631 | int ret, uid = getuid(); | |
2632 | struct stat buf; | |
2633 | ||
2634 | assert(path); | |
2635 | ||
cf53c06d | 2636 | if (uid == 0) { |
ab38c13f DG |
2637 | goto valid; |
2638 | } | |
2639 | ||
2640 | ret = stat(path, &buf); | |
2641 | if (ret < 0) { | |
2642 | if (errno != ENOENT) { | |
2643 | PERROR("stat"); | |
2644 | } | |
2645 | ret = -LTTNG_ERR_INVALID; | |
2646 | goto valid; | |
2647 | } | |
2648 | ||
2649 | if (buf.st_uid != uid) { | |
2650 | goto invalid; | |
2651 | } | |
2652 | ||
2653 | valid: | |
ab38c13f | 2654 | return 1; |
cf53c06d DG |
2655 | invalid: |
2656 | return 0; | |
ab38c13f DG |
2657 | } |
2658 | ||
dcf266c0 JG |
2659 | LTTNG_HIDDEN |
2660 | int config_load_session(const char *path, const char *session_name, | |
ab38c13f | 2661 | int override, unsigned int autoload) |
dcf266c0 JG |
2662 | { |
2663 | int ret; | |
cf53c06d | 2664 | const char *path_ptr = NULL; |
dcf266c0 JG |
2665 | struct session_config_validation_ctx validation_ctx = { 0 }; |
2666 | ||
2667 | ret = init_session_config_validation_ctx(&validation_ctx); | |
2668 | if (ret) { | |
2669 | goto end; | |
2670 | } | |
2671 | ||
2672 | if (!path) { | |
ab38c13f DG |
2673 | char *home_path; |
2674 | const char *sys_path; | |
2675 | ||
dcf266c0 | 2676 | /* Try home path */ |
ab38c13f | 2677 | home_path = utils_get_home_dir(); |
dcf266c0 | 2678 | if (home_path) { |
ab38c13f | 2679 | char path[PATH_MAX]; |
dcf266c0 | 2680 | |
d4fcf703 DG |
2681 | /* |
2682 | * Try user session configuration path. Ignore error here so we can | |
2683 | * continue loading the system wide sessions. | |
2684 | */ | |
ab38c13f DG |
2685 | if (autoload) { |
2686 | ret = snprintf(path, sizeof(path), | |
2687 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
2688 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
2689 | if (ret < 0) { |
2690 | PERROR("snprintf session autoload home config path"); | |
2691 | goto end; | |
2692 | } | |
2693 | ||
2694 | /* | |
2695 | * Credentials are only validated for the autoload in order to | |
2696 | * avoid any user session daemon to try to load kernel sessions | |
2697 | * automatically and failing all the times. | |
2698 | */ | |
2699 | ret = validate_path_creds(path); | |
2700 | if (ret) { | |
2701 | path_ptr = path; | |
2702 | } | |
ab38c13f DG |
2703 | } else { |
2704 | ret = snprintf(path, sizeof(path), | |
2705 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
2706 | if (ret < 0) { |
2707 | PERROR("snprintf session home config path"); | |
2708 | goto end; | |
2709 | } | |
2710 | path_ptr = path; | |
ab38c13f | 2711 | } |
cf53c06d DG |
2712 | if (path_ptr) { |
2713 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 DG |
2714 | &validation_ctx, override); |
2715 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
2716 | goto end; | |
2717 | } | |
2718 | /* | |
2719 | * Continue even if the session was found since we have to try | |
2720 | * the system wide sessions. | |
2721 | */ | |
ab38c13f | 2722 | } |
d4fcf703 | 2723 | } |
ab38c13f | 2724 | |
cf53c06d DG |
2725 | /* Reset path pointer for the system wide dir. */ |
2726 | path_ptr = NULL; | |
2727 | ||
d4fcf703 DG |
2728 | /* Try system wide configuration directory. */ |
2729 | if (autoload) { | |
2730 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
2731 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
2732 | ret = validate_path_creds(sys_path); |
2733 | if (ret) { | |
2734 | path_ptr = sys_path; | |
2735 | } | |
d4fcf703 | 2736 | } else { |
cf53c06d DG |
2737 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
2738 | path_ptr = sys_path; | |
d4fcf703 DG |
2739 | } |
2740 | ||
cf53c06d DG |
2741 | if (path_ptr) { |
2742 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 | 2743 | &validation_ctx, override); |
dcf266c0 JG |
2744 | } |
2745 | } else { | |
2746 | ret = access(path, F_OK); | |
2747 | if (ret < 0) { | |
2748 | PERROR("access"); | |
2749 | switch (errno) { | |
2750 | case ENOENT: | |
2751 | ret = -LTTNG_ERR_INVALID; | |
2752 | WARN("Session configuration path does not exist."); | |
2753 | break; | |
2754 | case EACCES: | |
2755 | ret = -LTTNG_ERR_EPERM; | |
2756 | break; | |
2757 | default: | |
2758 | ret = -LTTNG_ERR_UNK; | |
2759 | break; | |
2760 | } | |
2761 | goto end; | |
2762 | } | |
2763 | ||
2764 | ret = load_session_from_path(path, session_name, | |
2765 | &validation_ctx, override); | |
2766 | } | |
2767 | end: | |
2768 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
2769 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
2770 | /* | |
2771 | * Don't report an error if no sessions are found when called | |
2772 | * without a session_name or a search path. | |
2773 | */ | |
2774 | ret = 0; | |
2775 | } | |
dcf266c0 JG |
2776 | return ret; |
2777 | } |