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