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