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 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
1501a7f3 | 19 | #include <assert.h> |
1501a7f3 | 20 | #include <ctype.h> |
1501a7f3 JG |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
36f2332b | 24 | #include <inttypes.h> |
dcf266c0 JG |
25 | #include <dirent.h> |
26 | #include <unistd.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
6c66fa0f | 29 | #include <stdbool.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 | 43 | |
f40ef1d5 | 44 | #include "session-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"; | |
ec2ed7da JG |
99 | LTTNG_HIDDEN const char * const config_element_discarded_events = "discarded_events"; |
100 | LTTNG_HIDDEN const char * const config_element_lost_packets = "lost_packets"; | |
fb198a11 JG |
101 | const char * const config_element_type = "type"; |
102 | const char * const config_element_buffer_type = "buffer_type"; | |
103 | const char * const config_element_session = "session"; | |
104 | const char * const config_element_sessions = "sessions"; | |
ec2ed7da JG |
105 | LTTNG_HIDDEN const char * const config_element_context_perf = "perf"; |
106 | LTTNG_HIDDEN const char * const config_element_context_app = "app"; | |
107 | LTTNG_HIDDEN const char * const config_element_context_app_provider_name = "provider_name"; | |
108 | LTTNG_HIDDEN const char * const config_element_context_app_ctx_name = "ctx_name"; | |
fb198a11 JG |
109 | const char * const config_element_config = "config"; |
110 | const char * const config_element_started = "started"; | |
111 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
112 | const char * const config_element_loglevel = "loglevel"; | |
113 | const char * const config_element_loglevel_type = "loglevel_type"; | |
114 | const char * const config_element_filter = "filter"; | |
ec2ed7da | 115 | LTTNG_HIDDEN const char * const config_element_filter_expression = "filter_expression"; |
fb198a11 JG |
116 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; |
117 | const char * const config_element_consumer_output = "consumer_output"; | |
118 | const char * const config_element_destination = "destination"; | |
119 | const char * const config_element_path = "path"; | |
120 | const char * const config_element_net_output = "net_output"; | |
121 | const char * const config_element_control_uri = "control_uri"; | |
122 | const char * const config_element_data_uri = "data_uri"; | |
123 | const char * const config_element_max_size = "max_size"; | |
ccf10263 MD |
124 | const char * const config_element_pid = "pid"; |
125 | const char * const config_element_pids = "pids"; | |
9e7c9f56 | 126 | const char * const config_element_shared_memory_path = "shared_memory_path"; |
ebbf5ab7 JR |
127 | const char * const config_element_pid_tracker = "pid_tracker"; |
128 | const char * const config_element_trackers = "trackers"; | |
847a5916 JR |
129 | const char * const config_element_targets = "targets"; |
130 | const char * const config_element_target_pid = "pid_target"; | |
fb198a11 JG |
131 | |
132 | const char * const config_domain_type_kernel = "KERNEL"; | |
133 | const char * const config_domain_type_ust = "UST"; | |
134 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 135 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 136 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
137 | |
138 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
139 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
140 | const char * const config_buffer_type_global = "GLOBAL"; | |
141 | ||
142 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
143 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
144 | ||
145 | const char * const config_output_type_splice = "SPLICE"; | |
146 | const char * const config_output_type_mmap = "MMAP"; | |
147 | ||
148 | const char * const config_loglevel_type_all = "ALL"; | |
149 | const char * const config_loglevel_type_range = "RANGE"; | |
150 | const char * const config_loglevel_type_single = "SINGLE"; | |
151 | ||
152 | const char * const config_event_type_all = "ALL"; | |
153 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
154 | const char * const config_event_type_probe = "PROBE"; | |
155 | const char * const config_event_type_function = "FUNCTION"; | |
156 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
157 | const char * const config_event_type_noop = "NOOP"; | |
158 | const char * const config_event_type_syscall = "SYSCALL"; | |
159 | const char * const config_event_type_kprobe = "KPROBE"; | |
160 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
161 | ||
162 | const char * const config_event_context_pid = "PID"; | |
163 | const char * const config_event_context_procname = "PROCNAME"; | |
164 | const char * const config_event_context_prio = "PRIO"; | |
165 | const char * const config_event_context_nice = "NICE"; | |
166 | const char * const config_event_context_vpid = "VPID"; | |
167 | const char * const config_event_context_tid = "TID"; | |
168 | const char * const config_event_context_vtid = "VTID"; | |
169 | const char * const config_event_context_ppid = "PPID"; | |
170 | const char * const config_event_context_vppid = "VPPID"; | |
171 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
172 | const char * const config_event_context_hostname = "HOSTNAME"; | |
173 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 174 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
ec2ed7da JG |
175 | LTTNG_HIDDEN const char * const config_event_context_app = "APP"; |
176 | LTTNG_HIDDEN const char * const config_event_context_interruptible = "INTERRUPTIBLE"; | |
177 | LTTNG_HIDDEN const char * const config_event_context_preemptible = "PREEMPTIBLE"; | |
178 | LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE"; | |
179 | LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; | |
fb198a11 | 180 | |
fbd987c9 JG |
181 | /* Deprecated symbols */ |
182 | const char * const config_element_perf; | |
183 | ||
d7b645e2 JR |
184 | enum process_event_node_phase { |
185 | CREATION = 0, | |
186 | ENABLE = 1, | |
187 | }; | |
188 | ||
dcf266c0 JG |
189 | struct consumer_output { |
190 | int enabled; | |
191 | char *path; | |
192 | char *control_uri; | |
193 | char *data_uri; | |
194 | }; | |
195 | ||
1501a7f3 JG |
196 | static int config_entry_handler_filter(struct handler_filter_args *args, |
197 | const char *section, const char *name, const char *value) | |
198 | { | |
199 | int ret = 0; | |
200 | struct config_entry entry = { section, name, value }; | |
201 | ||
202 | assert(args); | |
203 | ||
204 | if (!section || !name || !value) { | |
205 | ret = -EIO; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | if (args->section) { | |
210 | if (strcmp(args->section, section)) { | |
211 | goto end; | |
212 | } | |
213 | } | |
214 | ||
215 | ret = args->handler(&entry, args->user_data); | |
216 | end: | |
217 | return ret; | |
218 | } | |
219 | ||
220 | LTTNG_HIDDEN | |
221 | int config_get_section_entries(const char *override_path, const char *section, | |
222 | config_entry_handler_cb handler, void *user_data) | |
223 | { | |
224 | int ret = 0; | |
7ab02a27 | 225 | char *path; |
1501a7f3 JG |
226 | FILE *config_file = NULL; |
227 | struct handler_filter_args filter = { section, handler, user_data }; | |
228 | ||
7ab02a27 DG |
229 | /* First, try system-wide conf. file. */ |
230 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
231 | ||
232 | config_file = fopen(path, "r"); | |
233 | if (config_file) { | |
234 | DBG("Loading daemon conf file at %s", path); | |
235 | /* | |
236 | * Return value is not very important here since error or not, we | |
237 | * continue and try the next possible conf. file. | |
238 | */ | |
239 | (void) ini_parse_file(config_file, | |
240 | (ini_entry_handler) config_entry_handler_filter, | |
241 | (void *) &filter); | |
242 | fclose(config_file); | |
243 | } | |
244 | ||
245 | /* Second is the user local configuration. */ | |
246 | path = utils_get_home_dir(); | |
247 | if (path) { | |
248 | char fullpath[PATH_MAX]; | |
249 | ||
250 | ret = snprintf(fullpath, sizeof(fullpath), | |
251 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
252 | if (ret < 0) { | |
253 | PERROR("snprintf user conf. path"); | |
254 | goto error; | |
255 | } | |
256 | ||
257 | config_file = fopen(fullpath, "r"); | |
258 | if (config_file) { | |
259 | DBG("Loading daemon user conf file at %s", path); | |
260 | /* | |
261 | * Return value is not very important here since error or not, we | |
262 | * continue and try the next possible conf. file. | |
263 | */ | |
264 | (void) ini_parse_file(config_file, | |
265 | (ini_entry_handler) config_entry_handler_filter, | |
266 | (void *) &filter); | |
267 | fclose(config_file); | |
268 | } | |
269 | } | |
270 | ||
271 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
272 | if (override_path) { |
273 | config_file = fopen(override_path, "r"); | |
274 | if (config_file) { | |
7ab02a27 DG |
275 | DBG("Loading daemon command line conf file at %s", override_path); |
276 | (void) ini_parse_file(config_file, | |
277 | (ini_entry_handler) config_entry_handler_filter, | |
278 | (void *) &filter); | |
279 | fclose(config_file); | |
1501a7f3 JG |
280 | } else { |
281 | ERR("Failed to open daemon configuration file at %s", | |
282 | override_path); | |
283 | ret = -ENOENT; | |
7ab02a27 | 284 | goto error; |
1501a7f3 JG |
285 | } |
286 | } | |
287 | ||
7ab02a27 DG |
288 | /* Everything went well. */ |
289 | ret = 0; | |
1501a7f3 | 290 | |
7ab02a27 | 291 | error: |
1501a7f3 JG |
292 | return ret; |
293 | } | |
294 | ||
295 | LTTNG_HIDDEN | |
296 | int config_parse_value(const char *value) | |
297 | { | |
298 | int i, ret = 0; | |
299 | char *endptr, *lower_str; | |
300 | size_t len; | |
301 | unsigned long v; | |
302 | ||
303 | len = strlen(value); | |
304 | if (!len) { | |
305 | ret = -1; | |
306 | goto end; | |
307 | } | |
308 | ||
309 | v = strtoul(value, &endptr, 10); | |
310 | if (endptr != value) { | |
311 | ret = v; | |
312 | goto end; | |
313 | } | |
314 | ||
315 | lower_str = zmalloc(len + 1); | |
316 | if (!lower_str) { | |
317 | PERROR("zmalloc"); | |
318 | ret = -errno; | |
319 | goto end; | |
320 | } | |
321 | ||
322 | for (i = 0; i < len; i++) { | |
323 | lower_str[i] = tolower(value[i]); | |
324 | } | |
325 | ||
326 | if (!strcmp(lower_str, config_str_yes) || | |
327 | !strcmp(lower_str, config_str_true) || | |
328 | !strcmp(lower_str, config_str_on)) { | |
329 | ret = 1; | |
330 | } else if (!strcmp(lower_str, config_str_no) || | |
331 | !strcmp(lower_str, config_str_false) || | |
332 | !strcmp(lower_str, config_str_off)) { | |
333 | ret = 0; | |
334 | } else { | |
335 | ret = -1; | |
336 | } | |
337 | ||
338 | free(lower_str); | |
339 | end: | |
340 | return ret; | |
341 | } | |
36f2332b JG |
342 | |
343 | /* | |
344 | * Returns a xmlChar string which must be released using xmlFree(). | |
345 | */ | |
346 | static xmlChar *encode_string(const char *in_str) | |
347 | { | |
348 | xmlChar *out_str = NULL; | |
349 | xmlCharEncodingHandlerPtr handler; | |
350 | int out_len, ret, in_len; | |
351 | ||
352 | assert(in_str); | |
353 | ||
354 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
355 | if (!handler) { | |
356 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
357 | goto end; | |
358 | } | |
359 | ||
360 | in_len = strlen(in_str); | |
361 | /* | |
f76d886f JG |
362 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
363 | * used because UTF-8 characters can take up to 4 bytes. | |
36f2332b | 364 | */ |
f76d886f | 365 | out_len = (in_len * 4) + 1; |
36f2332b JG |
366 | out_str = xmlMalloc(out_len); |
367 | if (!out_str) { | |
368 | goto end; | |
369 | } | |
370 | ||
371 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
372 | if (ret < 0) { | |
373 | xmlFree(out_str); | |
374 | out_str = NULL; | |
375 | goto end; | |
376 | } | |
377 | ||
378 | /* out_len is now the size of out_str */ | |
379 | out_str[out_len] = '\0'; | |
380 | end: | |
381 | return out_str; | |
382 | } | |
383 | ||
384 | LTTNG_HIDDEN | |
705bb62f | 385 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
386 | { |
387 | int ret; | |
388 | struct config_writer *writer; | |
389 | xmlOutputBufferPtr buffer; | |
390 | ||
391 | writer = zmalloc(sizeof(struct config_writer)); | |
392 | if (!writer) { | |
393 | PERROR("zmalloc config_writer_create"); | |
394 | goto end; | |
395 | } | |
396 | ||
397 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
398 | if (!buffer) { | |
399 | goto error_destroy; | |
400 | } | |
401 | ||
402 | writer->writer = xmlNewTextWriter(buffer); | |
403 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
404 | config_xml_encoding, NULL); | |
405 | if (ret < 0) { | |
406 | goto error_destroy; | |
407 | } | |
408 | ||
409 | ret = xmlTextWriterSetIndentString(writer->writer, | |
410 | BAD_CAST config_xml_indent_string); | |
705bb62f | 411 | if (ret) { |
36f2332b JG |
412 | goto error_destroy; |
413 | } | |
414 | ||
705bb62f JRJ |
415 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
416 | if (ret) { | |
36f2332b JG |
417 | goto error_destroy; |
418 | } | |
419 | ||
420 | end: | |
421 | return writer; | |
422 | error_destroy: | |
423 | config_writer_destroy(writer); | |
424 | return NULL; | |
425 | } | |
426 | ||
427 | LTTNG_HIDDEN | |
428 | int config_writer_destroy(struct config_writer *writer) | |
429 | { | |
430 | int ret = 0; | |
431 | ||
432 | if (!writer) { | |
433 | ret = -EINVAL; | |
434 | goto end; | |
435 | } | |
436 | ||
437 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
438 | WARN("Could not close XML document"); | |
439 | ret = -EIO; | |
440 | } | |
441 | ||
442 | if (writer->writer) { | |
443 | xmlFreeTextWriter(writer->writer); | |
444 | } | |
445 | ||
446 | free(writer); | |
447 | end: | |
448 | return ret; | |
449 | } | |
450 | ||
451 | LTTNG_HIDDEN | |
452 | int config_writer_open_element(struct config_writer *writer, | |
453 | const char *element_name) | |
454 | { | |
455 | int ret; | |
456 | xmlChar *encoded_element_name; | |
457 | ||
458 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
459 | ret = -1; | |
460 | goto end; | |
461 | } | |
462 | ||
463 | encoded_element_name = encode_string(element_name); | |
464 | if (!encoded_element_name) { | |
465 | ret = -1; | |
466 | goto end; | |
467 | } | |
468 | ||
469 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
470 | xmlFree(encoded_element_name); | |
471 | end: | |
28676a1d | 472 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
473 | } |
474 | ||
e10b6a1c JG |
475 | LTTNG_HIDDEN |
476 | int config_writer_write_attribute(struct config_writer *writer, | |
477 | const char *name, const char *value) | |
478 | { | |
479 | int ret; | |
480 | xmlChar *encoded_name = NULL; | |
481 | xmlChar *encoded_value = NULL; | |
482 | ||
483 | if (!writer || !writer->writer || !name || !name[0]) { | |
484 | ret = -1; | |
485 | goto end; | |
486 | } | |
487 | ||
488 | encoded_name = encode_string(name); | |
489 | if (!encoded_name) { | |
490 | ret = -1; | |
491 | goto end; | |
492 | } | |
493 | ||
494 | encoded_value = encode_string(value); | |
495 | if (!encoded_value) { | |
496 | ret = -1; | |
497 | goto end; | |
498 | } | |
499 | ||
500 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, | |
501 | encoded_value); | |
502 | end: | |
503 | xmlFree(encoded_name); | |
504 | xmlFree(encoded_value); | |
505 | return ret >= 0 ? 0 : ret; | |
506 | } | |
507 | ||
36f2332b JG |
508 | LTTNG_HIDDEN |
509 | int config_writer_close_element(struct config_writer *writer) | |
510 | { | |
511 | int ret; | |
512 | ||
513 | if (!writer || !writer->writer) { | |
514 | ret = -1; | |
515 | goto end; | |
516 | } | |
517 | ||
518 | ret = xmlTextWriterEndElement(writer->writer); | |
519 | end: | |
28676a1d | 520 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
521 | } |
522 | ||
523 | LTTNG_HIDDEN | |
524 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
525 | const char *element_name, uint64_t value) | |
526 | { | |
527 | int ret; | |
528 | xmlChar *encoded_element_name; | |
529 | ||
530 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
531 | ret = -1; | |
532 | goto end; | |
533 | } | |
534 | ||
535 | encoded_element_name = encode_string(element_name); | |
536 | if (!encoded_element_name) { | |
537 | ret = -1; | |
538 | goto end; | |
539 | } | |
540 | ||
541 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
542 | encoded_element_name, "%" PRIu64, value); | |
543 | xmlFree(encoded_element_name); | |
544 | end: | |
28676a1d | 545 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
546 | } |
547 | ||
548 | LTTNG_HIDDEN | |
549 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
550 | const char *element_name, int64_t value) | |
551 | { | |
552 | int ret; | |
553 | xmlChar *encoded_element_name; | |
554 | ||
555 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
556 | ret = -1; | |
557 | goto end; | |
558 | } | |
559 | ||
560 | encoded_element_name = encode_string(element_name); | |
561 | if (!encoded_element_name) { | |
562 | ret = -1; | |
563 | goto end; | |
564 | } | |
565 | ||
566 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
567 | encoded_element_name, "%" PRIi64, value); | |
568 | xmlFree(encoded_element_name); | |
569 | end: | |
28676a1d | 570 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
571 | } |
572 | ||
573 | LTTNG_HIDDEN | |
574 | int config_writer_write_element_bool(struct config_writer *writer, | |
575 | const char *element_name, int value) | |
576 | { | |
577 | return config_writer_write_element_string(writer, element_name, | |
578 | value ? config_xml_true : config_xml_false); | |
579 | } | |
580 | ||
581 | LTTNG_HIDDEN | |
582 | int config_writer_write_element_string(struct config_writer *writer, | |
583 | const char *element_name, const char *value) | |
584 | { | |
585 | int ret; | |
586 | xmlChar *encoded_element_name = NULL; | |
587 | xmlChar *encoded_value = NULL; | |
588 | ||
589 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
590 | !value) { | |
591 | ret = -1; | |
592 | goto end; | |
593 | } | |
594 | ||
595 | encoded_element_name = encode_string(element_name); | |
596 | if (!encoded_element_name) { | |
597 | ret = -1; | |
598 | goto end; | |
599 | } | |
600 | ||
601 | encoded_value = encode_string(value); | |
602 | if (!encoded_value) { | |
603 | ret = -1; | |
604 | goto end; | |
605 | } | |
606 | ||
607 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 608 | encoded_value); |
36f2332b JG |
609 | end: |
610 | xmlFree(encoded_element_name); | |
611 | xmlFree(encoded_value); | |
28676a1d | 612 | return ret >= 0 ? 0 : ret; |
36f2332b | 613 | } |
dcf266c0 JG |
614 | |
615 | static | |
616 | void xml_error_handler(void *ctx, const char *format, ...) | |
617 | { | |
618 | char *errMsg; | |
619 | va_list args; | |
620 | int ret; | |
621 | ||
622 | va_start(args, format); | |
623 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 624 | va_end(args); |
dcf266c0 JG |
625 | if (ret == -1) { |
626 | ERR("String allocation failed in xml error handler"); | |
627 | return; | |
628 | } | |
dcf266c0 JG |
629 | |
630 | fprintf(stderr, "XML Error: %s", errMsg); | |
631 | free(errMsg); | |
632 | } | |
633 | ||
634 | static | |
635 | void fini_session_config_validation_ctx( | |
636 | struct session_config_validation_ctx *ctx) | |
637 | { | |
638 | if (ctx->parser_ctx) { | |
639 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
640 | } | |
641 | ||
642 | if (ctx->schema) { | |
643 | xmlSchemaFree(ctx->schema); | |
644 | } | |
645 | ||
646 | if (ctx->schema_validation_ctx) { | |
647 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
648 | } | |
649 | ||
650 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
651 | } | |
652 | ||
54e399cb JG |
653 | static |
654 | char *get_session_config_xsd_path() | |
655 | { | |
656 | char *xsd_path; | |
e8fa9fb0 | 657 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
658 | size_t base_path_len; |
659 | size_t max_path_len; | |
660 | ||
661 | if (!base_path) { | |
662 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
663 | } | |
664 | ||
665 | base_path_len = strlen(base_path); | |
666 | max_path_len = base_path_len + | |
667 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
668 | xsd_path = zmalloc(max_path_len); | |
669 | if (!xsd_path) { | |
670 | goto end; | |
671 | } | |
672 | ||
673 | strncpy(xsd_path, base_path, max_path_len); | |
674 | if (xsd_path[base_path_len - 1] != '/') { | |
675 | xsd_path[base_path_len++] = '/'; | |
676 | } | |
677 | ||
678 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
679 | max_path_len - base_path_len); | |
680 | end: | |
681 | return xsd_path; | |
682 | } | |
683 | ||
dcf266c0 JG |
684 | static |
685 | int init_session_config_validation_ctx( | |
686 | struct session_config_validation_ctx *ctx) | |
687 | { | |
688 | int ret; | |
54e399cb JG |
689 | char *xsd_path = get_session_config_xsd_path(); |
690 | ||
691 | if (!xsd_path) { | |
692 | ret = -LTTNG_ERR_NOMEM; | |
693 | goto end; | |
694 | } | |
dcf266c0 | 695 | |
54e399cb | 696 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
697 | if (!ctx->parser_ctx) { |
698 | ERR("XSD parser context creation failed"); | |
699 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
700 | goto end; | |
701 | } | |
702 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
703 | xml_error_handler, NULL); | |
704 | ||
705 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
706 | if (!ctx->schema) { | |
707 | ERR("XSD parsing failed"); | |
708 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
709 | goto end; | |
710 | } | |
711 | ||
712 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
713 | if (!ctx->schema_validation_ctx) { | |
714 | ERR("XSD validation context creation failed"); | |
715 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
716 | goto end; | |
717 | } | |
718 | ||
719 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
720 | xml_error_handler, NULL); | |
721 | ret = 0; | |
722 | ||
723 | end: | |
724 | if (ret) { | |
725 | fini_session_config_validation_ctx(ctx); | |
726 | } | |
727 | ||
54e399cb | 728 | free(xsd_path); |
dcf266c0 JG |
729 | return ret; |
730 | } | |
731 | ||
732 | static | |
733 | int parse_uint(xmlChar *str, uint64_t *val) | |
734 | { | |
735 | int ret; | |
736 | char *endptr; | |
737 | ||
738 | if (!str || !val) { | |
739 | ret = -1; | |
740 | goto end; | |
741 | } | |
742 | ||
743 | *val = strtoull((const char *) str, &endptr, 10); | |
744 | if (!endptr || *endptr) { | |
745 | ret = -1; | |
746 | } else { | |
747 | ret = 0; | |
748 | } | |
749 | ||
750 | end: | |
751 | return ret; | |
752 | } | |
753 | ||
754 | static | |
755 | int parse_int(xmlChar *str, int64_t *val) | |
756 | { | |
757 | int ret; | |
758 | char *endptr; | |
759 | ||
760 | if (!str || !val) { | |
761 | ret = -1; | |
762 | goto end; | |
763 | } | |
764 | ||
765 | *val = strtoll((const char *) str, &endptr, 10); | |
766 | if (!endptr || *endptr) { | |
767 | ret = -1; | |
768 | } else { | |
769 | ret = 0; | |
770 | } | |
771 | ||
772 | end: | |
773 | return ret; | |
774 | } | |
775 | ||
776 | static | |
777 | int parse_bool(xmlChar *str, int *val) | |
778 | { | |
779 | int ret = 0; | |
780 | ||
781 | if (!str || !val) { | |
782 | ret = -1; | |
783 | goto end; | |
784 | } | |
785 | ||
786 | if (!strcmp((const char *) str, config_xml_true)) { | |
787 | *val = 1; | |
788 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
789 | *val = 0; | |
790 | } else { | |
791 | WARN("Invalid boolean value encoutered (%s).", | |
792 | (const char *) str); | |
793 | ret = -1; | |
794 | } | |
795 | end: | |
796 | return ret; | |
797 | } | |
798 | ||
799 | static | |
800 | int get_domain_type(xmlChar *domain) | |
801 | { | |
802 | int ret; | |
803 | ||
804 | if (!domain) { | |
805 | goto error; | |
806 | } | |
807 | ||
808 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
809 | ret = LTTNG_DOMAIN_KERNEL; | |
810 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
811 | ret = LTTNG_DOMAIN_UST; | |
812 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
813 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
814 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
815 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
816 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
817 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
818 | } else { |
819 | goto error; | |
820 | } | |
821 | ||
822 | return ret; | |
823 | error: | |
824 | return -1; | |
825 | } | |
826 | ||
827 | static | |
828 | int get_buffer_type(xmlChar *buffer_type) | |
829 | { | |
830 | int ret; | |
831 | ||
832 | if (!buffer_type) { | |
833 | goto error; | |
834 | } | |
835 | ||
836 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
837 | ret = LTTNG_BUFFER_GLOBAL; | |
838 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
839 | ret = LTTNG_BUFFER_PER_UID; | |
840 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
841 | ret = LTTNG_BUFFER_PER_PID; | |
842 | } else { | |
843 | goto error; | |
844 | } | |
845 | ||
846 | return ret; | |
847 | error: | |
848 | return -1; | |
849 | } | |
850 | ||
851 | static | |
852 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
853 | { | |
854 | int ret; | |
855 | ||
856 | if (!overwrite_mode) { | |
857 | goto error; | |
858 | } | |
859 | ||
860 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
861 | ret = 1; | |
862 | } else if (!strcmp((char *) overwrite_mode, | |
863 | config_overwrite_mode_discard)) { | |
864 | ret = 0; | |
865 | } else { | |
866 | goto error; | |
867 | } | |
868 | ||
869 | return ret; | |
870 | error: | |
871 | return -1; | |
872 | } | |
873 | ||
874 | static | |
875 | int get_output_type(xmlChar *output_type) | |
876 | { | |
877 | int ret; | |
878 | ||
879 | if (!output_type) { | |
880 | goto error; | |
881 | } | |
882 | ||
883 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
884 | ret = LTTNG_EVENT_MMAP; | |
885 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
886 | ret = LTTNG_EVENT_SPLICE; | |
887 | } else { | |
888 | goto error; | |
889 | } | |
890 | ||
891 | return ret; | |
892 | error: | |
893 | return -1; | |
894 | } | |
895 | ||
896 | static | |
897 | int get_event_type(xmlChar *event_type) | |
898 | { | |
899 | int ret; | |
900 | ||
901 | if (!event_type) { | |
902 | goto error; | |
903 | } | |
904 | ||
905 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
906 | ret = LTTNG_EVENT_ALL; | |
907 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
908 | ret = LTTNG_EVENT_TRACEPOINT; | |
909 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
910 | ret = LTTNG_EVENT_PROBE; | |
911 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
912 | ret = LTTNG_EVENT_FUNCTION; | |
913 | } else if (!strcmp((char *) event_type, | |
914 | config_event_type_function_entry)) { | |
915 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
916 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
917 | ret = LTTNG_EVENT_NOOP; | |
918 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
919 | ret = LTTNG_EVENT_SYSCALL; | |
920 | } else { | |
921 | goto error; | |
922 | } | |
923 | ||
924 | return ret; | |
925 | error: | |
926 | return -1; | |
927 | } | |
928 | ||
929 | static | |
930 | int get_loglevel_type(xmlChar *loglevel_type) | |
931 | { | |
932 | int ret; | |
933 | ||
934 | if (!loglevel_type) { | |
935 | goto error; | |
936 | } | |
937 | ||
938 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
939 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
940 | } else if (!strcmp((char *) loglevel_type, | |
941 | config_loglevel_type_range)) { | |
942 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
943 | } else if (!strcmp((char *) loglevel_type, | |
944 | config_loglevel_type_single)) { | |
945 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
946 | } else { | |
947 | goto error; | |
948 | } | |
949 | ||
950 | return ret; | |
951 | error: | |
952 | return -1; | |
953 | } | |
954 | ||
955 | /* | |
956 | * Return the context type or -1 on error. | |
957 | */ | |
958 | static | |
959 | int get_context_type(xmlChar *context_type) | |
960 | { | |
961 | int ret; | |
962 | ||
963 | if (!context_type) { | |
964 | goto error; | |
965 | } | |
966 | ||
967 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
968 | ret = LTTNG_EVENT_CONTEXT_PID; | |
969 | } else if (!strcmp((char *) context_type, | |
970 | config_event_context_procname)) { | |
971 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
972 | } else if (!strcmp((char *) context_type, | |
973 | config_event_context_prio)) { | |
974 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
975 | } else if (!strcmp((char *) context_type, | |
976 | config_event_context_nice)) { | |
977 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
978 | } else if (!strcmp((char *) context_type, | |
979 | config_event_context_vpid)) { | |
980 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
981 | } else if (!strcmp((char *) context_type, | |
982 | config_event_context_tid)) { | |
983 | ret = LTTNG_EVENT_CONTEXT_TID; | |
984 | } else if (!strcmp((char *) context_type, | |
985 | config_event_context_vtid)) { | |
986 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
987 | } else if (!strcmp((char *) context_type, | |
988 | config_event_context_ppid)) { | |
989 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
990 | } else if (!strcmp((char *) context_type, | |
991 | config_event_context_vppid)) { | |
992 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
993 | } else if (!strcmp((char *) context_type, | |
994 | config_event_context_pthread_id)) { | |
995 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
996 | } else if (!strcmp((char *) context_type, | |
997 | config_event_context_hostname)) { | |
998 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
999 | } else if (!strcmp((char *) context_type, | |
1000 | config_event_context_ip)) { | |
1001 | ret = LTTNG_EVENT_CONTEXT_IP; | |
1ae5e83e JD |
1002 | } else if (!strcmp((char *) context_type, |
1003 | config_event_context_interruptible)) { | |
1004 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; | |
1005 | } else if (!strcmp((char *) context_type, | |
1006 | config_event_context_preemptible)) { | |
1007 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; | |
1008 | } else if (!strcmp((char *) context_type, | |
1009 | config_event_context_need_reschedule)) { | |
1010 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; | |
1011 | } else if (!strcmp((char *) context_type, | |
1012 | config_event_context_migratable)) { | |
1013 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; | |
dcf266c0 JG |
1014 | } else { |
1015 | goto error; | |
1016 | } | |
1017 | ||
1018 | return ret; | |
1019 | error: | |
1020 | return -1; | |
1021 | } | |
1022 | ||
1023 | static | |
1024 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
1025 | { | |
1026 | int ret; | |
1027 | xmlNodePtr node; | |
1028 | ||
1029 | for (node = xmlFirstElementChild(domain_node); node; | |
1030 | node = xmlNextElementSibling(node)) { | |
1031 | if (!strcmp((const char *) node->name, config_element_type)) { | |
1032 | /* domain type */ | |
1033 | xmlChar *node_content = xmlNodeGetContent(node); | |
1034 | if (!node_content) { | |
1035 | ret = -LTTNG_ERR_NOMEM; | |
1036 | goto end; | |
1037 | } | |
1038 | ||
1039 | ret = get_domain_type(node_content); | |
1040 | free(node_content); | |
1041 | if (ret < 0) { | |
1042 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1043 | goto end; | |
1044 | } | |
1045 | ||
1046 | domain->type = ret; | |
1047 | } else if (!strcmp((const char *) node->name, | |
1048 | config_element_buffer_type)) { | |
1049 | /* buffer type */ | |
1050 | xmlChar *node_content = xmlNodeGetContent(node); | |
1051 | if (!node_content) { | |
1052 | ret = -LTTNG_ERR_NOMEM; | |
1053 | goto end; | |
1054 | } | |
1055 | ||
1056 | ret = get_buffer_type(node_content); | |
1057 | free(node_content); | |
1058 | if (ret < 0) { | |
1059 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1060 | goto end; | |
1061 | } | |
1062 | ||
1063 | domain->buf_type = ret; | |
1064 | } | |
1065 | } | |
1066 | ret = 0; | |
1067 | end: | |
1068 | return ret; | |
1069 | } | |
1070 | ||
1071 | static | |
1072 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1073 | char **data_uri) | |
1074 | { | |
1075 | xmlNodePtr node; | |
1076 | ||
1077 | for (node = xmlFirstElementChild(net_output_node); node; | |
1078 | node = xmlNextElementSibling(node)) { | |
1079 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1080 | /* control_uri */ | |
1081 | *control_uri = (char *) xmlNodeGetContent(node); | |
1082 | if (!*control_uri) { | |
1083 | break; | |
1084 | } | |
1085 | } else { | |
1086 | /* data_uri */ | |
1087 | *data_uri = (char *) xmlNodeGetContent(node); | |
1088 | if (!*data_uri) { | |
1089 | break; | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1095 | } | |
1096 | ||
1097 | static | |
1098 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1099 | struct consumer_output *output) | |
1100 | { | |
1101 | int ret; | |
1102 | xmlNodePtr node; | |
1103 | ||
1104 | assert(output); | |
1105 | ||
1106 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1107 | node = xmlNextElementSibling(node)) { | |
1108 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1109 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1110 | ||
1111 | /* enabled */ | |
1112 | if (!enabled_str) { | |
1113 | ret = -LTTNG_ERR_NOMEM; | |
1114 | goto end; | |
1115 | } | |
1116 | ||
1117 | ret = parse_bool(enabled_str, &output->enabled); | |
1118 | free(enabled_str); | |
1119 | if (ret) { | |
1120 | goto end; | |
1121 | } | |
1122 | } else { | |
1123 | xmlNodePtr output_type_node; | |
1124 | ||
1125 | /* destination */ | |
1126 | output_type_node = xmlFirstElementChild(node); | |
1127 | if (!output_type_node) { | |
1128 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1129 | goto end; | |
1130 | } | |
1131 | ||
1132 | if (!strcmp((const char *) output_type_node->name, | |
1133 | config_element_path)) { | |
1134 | /* path */ | |
1135 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1136 | if (!output->path) { | |
1137 | ret = -LTTNG_ERR_NOMEM; | |
1138 | goto end; | |
1139 | } | |
1140 | } else { | |
1141 | /* net_output */ | |
1142 | ret = get_net_output_uris(output_type_node, | |
1143 | &output->control_uri, &output->data_uri); | |
1144 | if (ret) { | |
1145 | goto end; | |
1146 | } | |
1147 | } | |
1148 | } | |
1149 | } | |
1150 | ret = 0; | |
1151 | ||
1152 | end: | |
1153 | if (ret) { | |
1154 | free(output->path); | |
1155 | free(output->control_uri); | |
1156 | free(output->data_uri); | |
1157 | memset(output, 0, sizeof(struct consumer_output)); | |
1158 | } | |
1159 | return ret; | |
1160 | } | |
1161 | ||
1162 | static | |
95681498 JG |
1163 | int create_session_net_output(const char *name, const char *control_uri, |
1164 | const char *data_uri) | |
dcf266c0 JG |
1165 | { |
1166 | int ret; | |
1167 | struct lttng_handle *handle; | |
1168 | const char *uri = NULL; | |
1169 | ||
1170 | assert(name); | |
dcf266c0 | 1171 | |
95681498 | 1172 | handle = lttng_create_handle(name, NULL); |
dcf266c0 JG |
1173 | if (!handle) { |
1174 | ret = -LTTNG_ERR_NOMEM; | |
1175 | goto end; | |
1176 | } | |
1177 | ||
1178 | if (!control_uri || !data_uri) { | |
1179 | uri = control_uri ? control_uri : data_uri; | |
1180 | control_uri = uri; | |
1181 | data_uri = uri; | |
1182 | } | |
1183 | ||
1184 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1185 | lttng_destroy_handle(handle); | |
1186 | end: | |
1187 | return ret; | |
1188 | } | |
1189 | ||
1190 | static | |
1b08cbce JR |
1191 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node, |
1192 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1193 | { |
1194 | int ret; | |
1195 | xmlNodePtr node = NULL; | |
1196 | xmlNodePtr snapshot_output_list_node; | |
1197 | xmlNodePtr snapshot_output_node; | |
1198 | ||
1199 | assert(session_name); | |
1200 | ||
1201 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1202 | if (ret) { | |
1203 | goto end; | |
1204 | } | |
1205 | ||
1206 | if (!output_node) { | |
1207 | goto end; | |
1208 | } | |
1209 | ||
1210 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1211 | ||
1212 | /* Parse and create snapshot outputs */ | |
1213 | ||
1214 | for (snapshot_output_node = | |
1215 | xmlFirstElementChild(snapshot_output_list_node); | |
1216 | snapshot_output_node; snapshot_output_node = | |
1217 | xmlNextElementSibling(snapshot_output_node)) { | |
1218 | char *name = NULL; | |
1219 | uint64_t max_size = UINT64_MAX; | |
1220 | struct consumer_output output = { 0 }; | |
1221 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1b08cbce JR |
1222 | const char *control_uri = NULL; |
1223 | const char *data_uri = NULL; | |
1224 | const char *path = NULL; | |
dcf266c0 JG |
1225 | |
1226 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1227 | node = xmlNextElementSibling(node)) { | |
1228 | if (!strcmp((const char *) node->name, | |
1229 | config_element_name)) { | |
1230 | /* name */ | |
1231 | name = (char *) xmlNodeGetContent(node); | |
1232 | if (!name) { | |
1233 | ret = -LTTNG_ERR_NOMEM; | |
1234 | goto error_snapshot_output; | |
1235 | } | |
1236 | } else if (!strcmp((const char *) node->name, | |
1237 | config_element_max_size)) { | |
1238 | xmlChar *content = xmlNodeGetContent(node); | |
1239 | ||
1240 | /* max_size */ | |
1241 | if (!content) { | |
1242 | ret = -LTTNG_ERR_NOMEM; | |
1243 | goto error_snapshot_output; | |
1244 | } | |
1245 | ret = parse_uint(content, &max_size); | |
1246 | free(content); | |
1247 | if (ret) { | |
1248 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1249 | goto error_snapshot_output; | |
1250 | } | |
1251 | } else { | |
1252 | /* consumer_output */ | |
1253 | ret = process_consumer_output(node, &output); | |
1254 | if (ret) { | |
1255 | goto error_snapshot_output; | |
1256 | } | |
1257 | } | |
1258 | } | |
1259 | ||
00d78798 JR |
1260 | control_uri = output.control_uri; |
1261 | data_uri = output.data_uri; | |
1262 | path = output.path; | |
1263 | ||
1b08cbce JR |
1264 | if (overrides) { |
1265 | if (overrides->path_url) { | |
1b08cbce | 1266 | path = overrides->path_url; |
00d78798 JR |
1267 | /* Control/data_uri are null */ |
1268 | control_uri = NULL; | |
1269 | data_uri = NULL; | |
1b08cbce JR |
1270 | } else { |
1271 | if (overrides->ctrl_url) { | |
1b08cbce | 1272 | control_uri = overrides->ctrl_url; |
00d78798 JR |
1273 | /* path is null */ |
1274 | path = NULL; | |
1b08cbce JR |
1275 | } |
1276 | if (overrides->data_url) { | |
1b08cbce | 1277 | data_uri = overrides->data_url; |
00d78798 JR |
1278 | /* path is null */ |
1279 | path = NULL; | |
1b08cbce JR |
1280 | } |
1281 | } | |
1b08cbce JR |
1282 | } |
1283 | ||
dcf266c0 JG |
1284 | snapshot_output = lttng_snapshot_output_create(); |
1285 | if (!snapshot_output) { | |
1286 | ret = -LTTNG_ERR_NOMEM; | |
1287 | goto error_snapshot_output; | |
1288 | } | |
1289 | ||
1290 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1291 | if (ret) { | |
1292 | goto error_snapshot_output; | |
1293 | } | |
1294 | ||
1295 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1296 | if (ret) { | |
1297 | goto error_snapshot_output; | |
1298 | } | |
1299 | ||
1b08cbce JR |
1300 | if (path) { |
1301 | ret = lttng_snapshot_output_set_ctrl_url(path, | |
dcf266c0 JG |
1302 | snapshot_output); |
1303 | if (ret) { | |
1304 | goto error_snapshot_output; | |
1305 | } | |
1306 | } else { | |
1b08cbce JR |
1307 | if (control_uri) { |
1308 | ret = lttng_snapshot_output_set_ctrl_url(control_uri, | |
dcf266c0 JG |
1309 | snapshot_output); |
1310 | if (ret) { | |
1311 | goto error_snapshot_output; | |
1312 | } | |
1313 | } | |
1314 | ||
1b08cbce JR |
1315 | if (data_uri) { |
1316 | ret = lttng_snapshot_output_set_data_url(data_uri, | |
dcf266c0 JG |
1317 | snapshot_output); |
1318 | if (ret) { | |
1319 | goto error_snapshot_output; | |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1325 | error_snapshot_output: | |
1326 | free(name); | |
1327 | free(output.path); | |
1328 | free(output.control_uri); | |
1329 | free(output.data_uri); | |
1330 | lttng_snapshot_output_destroy(snapshot_output); | |
1331 | if (ret) { | |
1332 | goto end; | |
1333 | } | |
1334 | } | |
1335 | end: | |
1336 | return ret; | |
1337 | } | |
1338 | ||
1339 | static | |
1340 | int create_session(const char *name, | |
1341 | struct lttng_domain *kernel_domain, | |
1342 | struct lttng_domain *ust_domain, | |
1343 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1344 | struct lttng_domain *log4j_domain, |
dcf266c0 | 1345 | xmlNodePtr output_node, |
1b08cbce JR |
1346 | uint64_t live_timer_interval, |
1347 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1348 | { |
1349 | int ret; | |
1350 | struct consumer_output output = { 0 }; | |
1351 | xmlNodePtr consumer_output_node; | |
1b08cbce JR |
1352 | const char *control_uri = NULL; |
1353 | const char *data_uri = NULL; | |
1354 | const char *path = NULL; | |
dcf266c0 JG |
1355 | |
1356 | assert(name); | |
dcf266c0 JG |
1357 | |
1358 | if (output_node) { | |
1359 | consumer_output_node = xmlFirstElementChild(output_node); | |
1360 | if (!consumer_output_node) { | |
1361 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1362 | goto end; | |
1363 | } | |
1364 | ||
1365 | if (strcmp((const char *) consumer_output_node->name, | |
1366 | config_element_consumer_output)) { | |
1367 | WARN("Invalid output type, expected %s node", | |
1368 | config_element_consumer_output); | |
1369 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1370 | goto end; | |
1371 | } | |
1372 | ||
1373 | ret = process_consumer_output(consumer_output_node, &output); | |
1374 | if (ret) { | |
1375 | goto end; | |
1376 | } | |
1377 | } | |
1378 | ||
00d78798 JR |
1379 | control_uri = output.control_uri; |
1380 | data_uri = output.data_uri; | |
1381 | path = output.path; | |
1382 | ||
1b08cbce JR |
1383 | /* Check for override and apply them */ |
1384 | if (overrides) { | |
1385 | if (overrides->path_url) { | |
1b08cbce | 1386 | path = overrides->path_url; |
00d78798 JR |
1387 | /* control/data_uri are null */; |
1388 | control_uri = NULL; | |
1389 | data_uri = NULL; | |
1b08cbce JR |
1390 | } else { |
1391 | if (overrides->ctrl_url) { | |
1b08cbce | 1392 | control_uri = overrides->ctrl_url; |
00d78798 JR |
1393 | /* path is null */ |
1394 | path = NULL; | |
1b08cbce JR |
1395 | } |
1396 | if (overrides->data_url) { | |
1b08cbce | 1397 | data_uri = overrides->data_url; |
00d78798 JR |
1398 | /* path is null */ |
1399 | path = NULL; | |
1b08cbce JR |
1400 | } |
1401 | } | |
1b08cbce JR |
1402 | } |
1403 | ||
00d78798 | 1404 | |
1b08cbce | 1405 | if (live_timer_interval != UINT64_MAX && !control_uri && !data_uri) { |
dcf266c0 JG |
1406 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
1407 | goto end; | |
1408 | } | |
1409 | ||
1b08cbce | 1410 | if (control_uri || data_uri) { |
dcf266c0 JG |
1411 | /* network destination */ |
1412 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1413 | /* |
1414 | * URLs are provided for sure since the test above make sure that | |
1415 | * with a live timer the data and control URIs are provided. So, | |
1416 | * NULL is passed here and will be set right after. | |
1417 | */ | |
1418 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1419 | } else { |
1420 | ret = lttng_create_session(name, NULL); | |
1421 | } | |
1422 | if (ret) { | |
1423 | goto end; | |
1424 | } | |
1425 | ||
1b08cbce | 1426 | ret = create_session_net_output(name, control_uri, data_uri); |
95681498 JG |
1427 | if (ret) { |
1428 | goto end; | |
dcf266c0 | 1429 | } |
95681498 | 1430 | |
dcf266c0 JG |
1431 | } else { |
1432 | /* either local output or no output */ | |
1b08cbce | 1433 | ret = lttng_create_session(name, path); |
dcf266c0 JG |
1434 | if (ret) { |
1435 | goto end; | |
1436 | } | |
1437 | } | |
1438 | end: | |
1439 | free(output.path); | |
1440 | free(output.control_uri); | |
1441 | free(output.data_uri); | |
1442 | return ret; | |
1443 | } | |
1444 | static | |
1445 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1446 | struct lttng_event_probe_attr *attr) | |
1447 | { | |
1448 | int ret; | |
1449 | ||
1450 | assert(probe_attribute_node); | |
1451 | assert(attr); | |
1452 | ||
1453 | if (!strcmp((const char *) probe_attribute_node->name, | |
1454 | config_element_address)) { | |
1455 | xmlChar *content; | |
1456 | uint64_t addr = 0; | |
1457 | ||
1458 | /* addr */ | |
1459 | content = xmlNodeGetContent(probe_attribute_node); | |
1460 | if (!content) { | |
1461 | ret = -LTTNG_ERR_NOMEM; | |
1462 | goto end; | |
1463 | } | |
1464 | ||
1465 | ret = parse_uint(content, &addr); | |
1466 | free(content); | |
1467 | if (ret) { | |
1468 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1469 | goto end; | |
1470 | } | |
1471 | ||
1472 | attr->addr = addr; | |
1473 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1474 | config_element_offset)) { | |
1475 | xmlChar *content; | |
1476 | uint64_t offset = 0; | |
1477 | ||
1478 | /* offset */ | |
1479 | content = xmlNodeGetContent(probe_attribute_node); | |
1480 | if (!content) { | |
1481 | ret = -LTTNG_ERR_NOMEM; | |
1482 | goto end; | |
1483 | } | |
1484 | ||
1485 | ret = parse_uint(content, &offset); | |
1486 | free(content); | |
1487 | if (ret) { | |
1488 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1489 | goto end; | |
1490 | } | |
1491 | ||
1492 | attr->offset = offset; | |
1493 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1494 | config_element_symbol_name)) { | |
1495 | xmlChar *content; | |
1496 | size_t name_len; | |
1497 | ||
1498 | /* symbol_name */ | |
1499 | content = xmlNodeGetContent(probe_attribute_node); | |
1500 | if (!content) { | |
1501 | ret = -LTTNG_ERR_NOMEM; | |
1502 | goto end; | |
1503 | } | |
1504 | ||
1505 | name_len = strlen((char *) content); | |
1506 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1507 | WARN("symbol_name too long."); | |
1508 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1509 | free(content); | |
1510 | goto end; | |
1511 | } | |
1512 | ||
1513 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1514 | free(content); | |
1515 | } | |
1516 | ret = 0; | |
1517 | end: | |
1518 | return ret; | |
1519 | } | |
1520 | ||
1521 | static | |
1522 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
d7b645e2 | 1523 | const char *channel_name, const enum process_event_node_phase phase) |
dcf266c0 | 1524 | { |
d7b645e2 | 1525 | int ret = 0, i; |
dcf266c0 JG |
1526 | xmlNodePtr node; |
1527 | struct lttng_event event; | |
1528 | char **exclusions = NULL; | |
1529 | unsigned long exclusion_count = 0; | |
1530 | char *filter_expression = NULL; | |
1531 | ||
1532 | assert(event_node); | |
1533 | assert(handle); | |
1534 | assert(channel_name); | |
1535 | ||
1536 | memset(&event, 0, sizeof(event)); | |
1537 | ||
f40eba3d JG |
1538 | /* Initialize default log level which varies by domain */ |
1539 | switch (handle->domain.type) | |
1540 | { | |
1541 | case LTTNG_DOMAIN_JUL: | |
1542 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; | |
1543 | break; | |
1544 | case LTTNG_DOMAIN_LOG4J: | |
1545 | event.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; | |
1546 | break; | |
1547 | case LTTNG_DOMAIN_PYTHON: | |
1548 | event.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; | |
1549 | break; | |
1550 | case LTTNG_DOMAIN_UST: | |
1551 | case LTTNG_DOMAIN_KERNEL: | |
1552 | event.loglevel = LTTNG_LOGLEVEL_DEBUG; | |
1553 | break; | |
1554 | default: | |
1555 | assert(0); | |
1556 | } | |
1557 | ||
dcf266c0 JG |
1558 | for (node = xmlFirstElementChild(event_node); node; |
1559 | node = xmlNextElementSibling(node)) { | |
1560 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1561 | xmlChar *content; | |
1562 | size_t name_len; | |
1563 | ||
1564 | /* name */ | |
1565 | content = xmlNodeGetContent(node); | |
1566 | if (!content) { | |
1567 | ret = -LTTNG_ERR_NOMEM; | |
1568 | goto end; | |
1569 | } | |
1570 | ||
1571 | name_len = strlen((char *) content); | |
1572 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1573 | WARN("Channel name too long."); | |
1574 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1575 | free(content); | |
1576 | goto end; | |
1577 | } | |
1578 | ||
1579 | strncpy(event.name, (const char *) content, name_len); | |
1580 | free(content); | |
1581 | } else if (!strcmp((const char *) node->name, | |
1582 | config_element_enabled)) { | |
1583 | xmlChar *content = xmlNodeGetContent(node); | |
1584 | ||
1585 | /* enabled */ | |
1586 | if (!content) { | |
1587 | ret = -LTTNG_ERR_NOMEM; | |
1588 | goto end; | |
1589 | } | |
1590 | ||
1591 | ret = parse_bool(content, &event.enabled); | |
1592 | free(content); | |
1593 | if (ret) { | |
1594 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1595 | goto end; | |
1596 | } | |
1597 | } else if (!strcmp((const char *) node->name, | |
1598 | config_element_type)) { | |
1599 | xmlChar *content = xmlNodeGetContent(node); | |
1600 | ||
1601 | /* type */ | |
1602 | if (!content) { | |
1603 | ret = -LTTNG_ERR_NOMEM; | |
1604 | goto end; | |
1605 | } | |
1606 | ||
1607 | ret = get_event_type(content); | |
1608 | free(content); | |
1609 | if (ret < 0) { | |
1610 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1611 | goto end; | |
1612 | } | |
1613 | ||
1614 | event.type = ret; | |
1615 | } else if (!strcmp((const char *) node->name, | |
1616 | config_element_loglevel_type)) { | |
1617 | xmlChar *content = xmlNodeGetContent(node); | |
1618 | ||
1619 | /* loglevel_type */ | |
1620 | if (!content) { | |
1621 | ret = -LTTNG_ERR_NOMEM; | |
1622 | goto end; | |
1623 | } | |
1624 | ||
1625 | ret = get_loglevel_type(content); | |
1626 | free(content); | |
1627 | if (ret < 0) { | |
1628 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1629 | goto end; | |
1630 | } | |
1631 | ||
1632 | event.loglevel_type = ret; | |
1633 | } else if (!strcmp((const char *) node->name, | |
1634 | config_element_loglevel)) { | |
1635 | xmlChar *content; | |
1636 | int64_t loglevel = 0; | |
1637 | ||
1638 | /* loglevel */ | |
1639 | content = xmlNodeGetContent(node); | |
1640 | if (!content) { | |
1641 | ret = -LTTNG_ERR_NOMEM; | |
1642 | goto end; | |
1643 | } | |
1644 | ||
1645 | ret = parse_int(content, &loglevel); | |
1646 | free(content); | |
1647 | if (ret) { | |
1648 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1649 | goto end; | |
1650 | } | |
1651 | ||
1652 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1653 | WARN("loglevel out of range."); | |
1654 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1655 | goto end; | |
1656 | } | |
1657 | ||
1658 | event.loglevel = loglevel; | |
1659 | } else if (!strcmp((const char *) node->name, | |
1660 | config_element_filter)) { | |
1661 | xmlChar *content = | |
1662 | xmlNodeGetContent(node); | |
1663 | ||
1664 | /* filter */ | |
1665 | if (!content) { | |
1666 | ret = -LTTNG_ERR_NOMEM; | |
1667 | goto end; | |
1668 | } | |
1669 | ||
02d8ac3d | 1670 | free(filter_expression); |
dcf266c0 JG |
1671 | filter_expression = strdup((char *) content); |
1672 | free(content); | |
1673 | if (!filter_expression) { | |
1674 | ret = -LTTNG_ERR_NOMEM; | |
1675 | goto end; | |
1676 | } | |
1677 | } else if (!strcmp((const char *) node->name, | |
1678 | config_element_exclusions)) { | |
1679 | xmlNodePtr exclusion_node; | |
1680 | int exclusion_index = 0; | |
1681 | ||
1682 | /* exclusions */ | |
1683 | if (exclusions) { | |
1684 | /* | |
1685 | * Exclusions has already been initialized, | |
1686 | * invalid file. | |
1687 | */ | |
1688 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1689 | goto end; | |
1690 | } | |
1691 | ||
1692 | exclusion_count = xmlChildElementCount(node); | |
1693 | if (!exclusion_count) { | |
1694 | continue; | |
1695 | } | |
1696 | ||
1697 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1698 | if (!exclusions) { | |
1699 | exclusion_count = 0; | |
1700 | ret = -LTTNG_ERR_NOMEM; | |
1701 | goto end; | |
1702 | } | |
1703 | ||
1704 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1705 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1706 | xmlChar *content = | |
1707 | xmlNodeGetContent(exclusion_node); | |
1708 | ||
1709 | if (!content) { | |
1710 | ret = -LTTNG_ERR_NOMEM; | |
1711 | goto end; | |
1712 | } | |
1713 | ||
1714 | exclusions[exclusion_index] = strdup((const char *) content); | |
1715 | free(content); | |
1716 | if (!exclusions[exclusion_index]) { | |
1717 | ret = -LTTNG_ERR_NOMEM; | |
1718 | goto end; | |
1719 | } | |
1720 | exclusion_index++; | |
1721 | } | |
1722 | ||
1723 | event.exclusion = 1; | |
1724 | } else if (!strcmp((const char *) node->name, | |
1725 | config_element_attributes)) { | |
1726 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1727 | ||
1728 | /* attributes */ | |
1729 | if (!attribute_node) { | |
1730 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1731 | goto end; | |
1732 | } | |
1733 | ||
1734 | if (!strcmp((const char *) node->name, | |
1735 | config_element_probe_attributes)) { | |
1736 | xmlNodePtr probe_attribute_node; | |
1737 | ||
1738 | /* probe_attributes */ | |
1739 | for (probe_attribute_node = | |
1740 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1741 | probe_attribute_node = xmlNextElementSibling( | |
1742 | probe_attribute_node)) { | |
1743 | ||
1744 | ret = process_probe_attribute_node(probe_attribute_node, | |
1745 | &event.attr.probe); | |
1746 | if (ret) { | |
1747 | goto end; | |
1748 | } | |
1749 | } | |
1750 | } else { | |
1751 | size_t sym_len; | |
1752 | xmlChar *content; | |
1753 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1754 | ||
1755 | /* function_attributes */ | |
1756 | content = xmlNodeGetContent(symbol_node); | |
1757 | if (!content) { | |
1758 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1759 | goto end; | |
1760 | } | |
1761 | ||
1762 | sym_len = strlen((char *) content); | |
1763 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1764 | WARN("Function name too long."); | |
1765 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1766 | free(content); | |
1767 | goto end; | |
1768 | } | |
1769 | ||
1770 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1771 | sym_len); | |
1772 | free(content); | |
1773 | } | |
1774 | } | |
1775 | } | |
1776 | ||
d7b645e2 JR |
1777 | if ((event.enabled && phase == ENABLE) || phase == CREATION) { |
1778 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1779 | filter_expression, exclusion_count, exclusions); | |
1780 | if (ret < 0) { | |
1781 | WARN("Enabling event (name:%s) on load failed.", event.name); | |
1782 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1783 | goto end; | |
1784 | } | |
065321e9 | 1785 | } |
dcf266c0 JG |
1786 | end: |
1787 | for (i = 0; i < exclusion_count; i++) { | |
1788 | free(exclusions[i]); | |
1789 | } | |
1790 | ||
1791 | free(exclusions); | |
1792 | free(filter_expression); | |
1793 | return ret; | |
1794 | } | |
1795 | ||
1796 | static | |
1797 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1798 | const char *channel_name) | |
1799 | { | |
1800 | int ret = 0; | |
d7b645e2 | 1801 | struct lttng_event event; |
dcf266c0 JG |
1802 | xmlNodePtr node; |
1803 | ||
1804 | assert(events_node); | |
1805 | assert(handle); | |
1806 | assert(channel_name); | |
1807 | ||
1808 | for (node = xmlFirstElementChild(events_node); node; | |
1809 | node = xmlNextElementSibling(node)) { | |
d7b645e2 | 1810 | ret = process_event_node(node, handle, channel_name, CREATION); |
dcf266c0 JG |
1811 | if (ret) { |
1812 | goto end; | |
1813 | } | |
1814 | } | |
d7b645e2 JR |
1815 | |
1816 | /* | |
1817 | * Disable all events to enable only the necessary events. | |
1818 | * Limitations regarding lttng_disable_events and tuple descriptor | |
1819 | * force this approach. | |
1820 | */ | |
1821 | memset(&event, 0, sizeof(event)); | |
1822 | event.loglevel = -1; | |
1823 | event.type = LTTNG_EVENT_ALL; | |
1824 | ret = lttng_disable_event_ext(handle, &event, channel_name, NULL); | |
1825 | if (ret) { | |
1826 | goto end; | |
1827 | } | |
1828 | ||
1829 | for (node = xmlFirstElementChild(events_node); node; | |
1830 | node = xmlNextElementSibling(node)) { | |
1831 | ret = process_event_node(node, handle, channel_name, ENABLE); | |
1832 | if (ret) { | |
1833 | goto end; | |
1834 | } | |
1835 | } | |
1836 | ||
dcf266c0 JG |
1837 | end: |
1838 | return ret; | |
1839 | } | |
1840 | ||
1841 | static | |
1842 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1843 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1844 | xmlNodePtr *events_node) | |
1845 | { | |
1846 | int ret; | |
1847 | ||
1848 | assert(attr_node); | |
1849 | assert(channel); | |
1850 | assert(contexts_node); | |
1851 | assert(events_node); | |
1852 | ||
1853 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1854 | xmlChar *content; | |
1855 | size_t name_len; | |
1856 | ||
1857 | /* name */ | |
1858 | content = xmlNodeGetContent(attr_node); | |
1859 | if (!content) { | |
1860 | ret = -LTTNG_ERR_NOMEM; | |
1861 | goto end; | |
1862 | } | |
1863 | ||
1864 | name_len = strlen((char *) content); | |
1865 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1866 | WARN("Channel name too long."); | |
1867 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1868 | free(content); | |
1869 | goto end; | |
1870 | } | |
1871 | ||
1872 | strncpy(channel->name, (const char *) content, name_len); | |
1873 | free(content); | |
1874 | } else if (!strcmp((const char *) attr_node->name, | |
1875 | config_element_enabled)) { | |
1876 | xmlChar *content; | |
1877 | int enabled; | |
1878 | ||
1879 | /* enabled */ | |
1880 | content = xmlNodeGetContent(attr_node); | |
1881 | if (!content) { | |
1882 | ret = -LTTNG_ERR_NOMEM; | |
1883 | goto end; | |
1884 | } | |
1885 | ||
1886 | ret = parse_bool(content, &enabled); | |
1887 | free(content); | |
1888 | if (ret) { | |
1889 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1890 | goto end; | |
1891 | } | |
1892 | ||
1893 | channel->enabled = enabled; | |
1894 | } else if (!strcmp((const char *) attr_node->name, | |
1895 | config_element_overwrite_mode)) { | |
1896 | xmlChar *content; | |
1897 | ||
1898 | /* overwrite_mode */ | |
1899 | content = xmlNodeGetContent(attr_node); | |
1900 | if (!content) { | |
1901 | ret = -LTTNG_ERR_NOMEM; | |
1902 | goto end; | |
1903 | } | |
1904 | ||
1905 | ret = get_overwrite_mode(content); | |
1906 | free(content); | |
1907 | if (ret < 0) { | |
1908 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1909 | goto end; | |
1910 | } | |
1911 | ||
1912 | channel->attr.overwrite = ret; | |
1913 | } else if (!strcmp((const char *) attr_node->name, | |
1914 | config_element_subbuf_size)) { | |
1915 | xmlChar *content; | |
1916 | ||
1917 | /* subbuffer_size */ | |
1918 | content = xmlNodeGetContent(attr_node); | |
1919 | if (!content) { | |
1920 | ret = -LTTNG_ERR_NOMEM; | |
1921 | goto end; | |
1922 | } | |
1923 | ||
1924 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1925 | free(content); | |
1926 | if (ret) { | |
1927 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1928 | goto end; | |
1929 | } | |
1930 | } else if (!strcmp((const char *) attr_node->name, | |
1931 | config_element_num_subbuf)) { | |
1932 | xmlChar *content; | |
1933 | ||
1934 | /* subbuffer_count */ | |
1935 | content = xmlNodeGetContent(attr_node); | |
1936 | if (!content) { | |
1937 | ret = -LTTNG_ERR_NOMEM; | |
1938 | goto end; | |
1939 | } | |
1940 | ||
1941 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1942 | free(content); | |
1943 | if (ret) { | |
1944 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1945 | goto end; | |
1946 | } | |
1947 | } else if (!strcmp((const char *) attr_node->name, | |
1948 | config_element_switch_timer_interval)) { | |
1949 | xmlChar *content; | |
1950 | uint64_t switch_timer_interval = 0; | |
1951 | ||
1952 | /* switch_timer_interval */ | |
1953 | content = xmlNodeGetContent(attr_node); | |
1954 | if (!content) { | |
1955 | ret = -LTTNG_ERR_NOMEM; | |
1956 | goto end; | |
1957 | } | |
1958 | ||
1959 | ret = parse_uint(content, &switch_timer_interval); | |
1960 | free(content); | |
1961 | if (ret) { | |
1962 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1963 | goto end; | |
1964 | } | |
1965 | ||
1966 | if (switch_timer_interval > UINT_MAX) { | |
1967 | WARN("switch_timer_interval out of range."); | |
1968 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1969 | goto end; | |
1970 | } | |
1971 | ||
1972 | channel->attr.switch_timer_interval = | |
1973 | switch_timer_interval; | |
1974 | } else if (!strcmp((const char *) attr_node->name, | |
1975 | config_element_read_timer_interval)) { | |
1976 | xmlChar *content; | |
1977 | uint64_t read_timer_interval = 0; | |
1978 | ||
1979 | /* read_timer_interval */ | |
1980 | content = xmlNodeGetContent(attr_node); | |
1981 | if (!content) { | |
1982 | ret = -LTTNG_ERR_NOMEM; | |
1983 | goto end; | |
1984 | } | |
1985 | ||
1986 | ret = parse_uint(content, &read_timer_interval); | |
1987 | free(content); | |
1988 | if (ret) { | |
1989 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1990 | goto end; | |
1991 | } | |
1992 | ||
1993 | if (read_timer_interval > UINT_MAX) { | |
1994 | WARN("read_timer_interval out of range."); | |
1995 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1996 | goto end; | |
1997 | } | |
1998 | ||
1999 | channel->attr.read_timer_interval = | |
2000 | read_timer_interval; | |
2001 | } else if (!strcmp((const char *) attr_node->name, | |
2002 | config_element_output_type)) { | |
2003 | xmlChar *content; | |
2004 | ||
2005 | /* output_type */ | |
2006 | content = xmlNodeGetContent(attr_node); | |
2007 | if (!content) { | |
2008 | ret = -LTTNG_ERR_NOMEM; | |
2009 | goto end; | |
2010 | } | |
2011 | ||
2012 | ret = get_output_type(content); | |
2013 | free(content); | |
2014 | if (ret < 0) { | |
2015 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2016 | goto end; | |
2017 | } | |
2018 | ||
2019 | channel->attr.output = ret; | |
2020 | } else if (!strcmp((const char *) attr_node->name, | |
2021 | config_element_tracefile_size)) { | |
2022 | xmlChar *content; | |
2023 | ||
2024 | /* tracefile_size */ | |
2025 | content = xmlNodeGetContent(attr_node); | |
2026 | if (!content) { | |
2027 | ret = -LTTNG_ERR_NOMEM; | |
2028 | goto end; | |
2029 | } | |
2030 | ||
2031 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
2032 | free(content); | |
2033 | if (ret) { | |
2034 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2035 | goto end; | |
2036 | } | |
2037 | } else if (!strcmp((const char *) attr_node->name, | |
2038 | config_element_tracefile_count)) { | |
2039 | xmlChar *content; | |
2040 | ||
2041 | /* tracefile_count */ | |
2042 | content = xmlNodeGetContent(attr_node); | |
2043 | if (!content) { | |
2044 | ret = -LTTNG_ERR_NOMEM; | |
2045 | goto end; | |
2046 | } | |
2047 | ||
2048 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
2049 | free(content); | |
2050 | if (ret) { | |
2051 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2052 | goto end; | |
2053 | } | |
2054 | } else if (!strcmp((const char *) attr_node->name, | |
2055 | config_element_live_timer_interval)) { | |
2056 | xmlChar *content; | |
2057 | uint64_t live_timer_interval = 0; | |
2058 | ||
2059 | /* live_timer_interval */ | |
2060 | content = xmlNodeGetContent(attr_node); | |
2061 | if (!content) { | |
2062 | ret = -LTTNG_ERR_NOMEM; | |
2063 | goto end; | |
2064 | } | |
2065 | ||
2066 | ret = parse_uint(content, &live_timer_interval); | |
2067 | free(content); | |
2068 | if (ret) { | |
2069 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2070 | goto end; | |
2071 | } | |
2072 | ||
2073 | if (live_timer_interval > UINT_MAX) { | |
2074 | WARN("live_timer_interval out of range."); | |
2075 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2076 | goto end; | |
2077 | } | |
2078 | ||
2079 | channel->attr.live_timer_interval = | |
2080 | live_timer_interval; | |
2081 | } else if (!strcmp((const char *) attr_node->name, | |
2082 | config_element_events)) { | |
2083 | /* events */ | |
2084 | *events_node = attr_node; | |
2085 | } else { | |
2086 | /* contexts */ | |
2087 | *contexts_node = attr_node; | |
2088 | } | |
2089 | ret = 0; | |
2090 | end: | |
2091 | return ret; | |
2092 | } | |
2093 | ||
2094 | static | |
2095 | int process_context_node(xmlNodePtr context_node, | |
2096 | struct lttng_handle *handle, const char *channel_name) | |
2097 | { | |
2098 | int ret; | |
2099 | struct lttng_event_context context; | |
2100 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
2101 | ||
2102 | assert(handle); | |
2103 | assert(channel_name); | |
2104 | ||
2105 | if (!context_child_node) { | |
2106 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2107 | goto end; | |
2108 | } | |
2109 | ||
2110 | memset(&context, 0, sizeof(context)); | |
2111 | ||
2112 | if (!strcmp((const char *) context_child_node->name, | |
2113 | config_element_type)) { | |
2114 | /* type */ | |
2115 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
045fc617 | 2116 | |
dcf266c0 JG |
2117 | if (!content) { |
2118 | ret = -LTTNG_ERR_NOMEM; | |
2119 | goto end; | |
2120 | } | |
2121 | ||
2122 | ret = get_context_type(content); | |
2123 | free(content); | |
2124 | if (ret < 0) { | |
2125 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2126 | goto end; | |
2127 | } | |
2128 | ||
2129 | context.ctx = ret; | |
045fc617 JG |
2130 | } else if (!strcmp((const char *) context_child_node->name, |
2131 | config_element_context_perf)) { | |
2132 | /* perf */ | |
dcf266c0 JG |
2133 | xmlNodePtr perf_attr_node; |
2134 | ||
14ce5bd8 JG |
2135 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
2136 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
2137 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
2138 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
2139 | perf_attr_node; perf_attr_node = | |
2140 | xmlNextElementSibling(perf_attr_node)) { | |
2141 | if (!strcmp((const char *) perf_attr_node->name, | |
2142 | config_element_type)) { | |
2143 | xmlChar *content; | |
2144 | uint64_t type = 0; | |
2145 | ||
2146 | /* type */ | |
2147 | content = xmlNodeGetContent(perf_attr_node); | |
2148 | if (!content) { | |
2149 | ret = -LTTNG_ERR_NOMEM; | |
2150 | goto end; | |
2151 | } | |
2152 | ||
2153 | ret = parse_uint(content, &type); | |
2154 | free(content); | |
2155 | if (ret) { | |
2156 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2157 | goto end; | |
2158 | } | |
2159 | ||
2160 | if (type > UINT32_MAX) { | |
2161 | WARN("perf context type out of range."); | |
2162 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2163 | goto end; | |
2164 | } | |
2165 | ||
2166 | context.u.perf_counter.type = type; | |
2167 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2168 | config_element_config)) { | |
2169 | xmlChar *content; | |
2170 | uint64_t config = 0; | |
2171 | ||
2172 | /* config */ | |
2173 | content = xmlNodeGetContent(perf_attr_node); | |
2174 | if (!content) { | |
2175 | ret = -LTTNG_ERR_NOMEM; | |
2176 | goto end; | |
2177 | } | |
2178 | ||
2179 | ret = parse_uint(content, &config); | |
2180 | free(content); | |
2181 | if (ret) { | |
2182 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2183 | goto end; | |
2184 | } | |
2185 | ||
2186 | context.u.perf_counter.config = config; | |
2187 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2188 | config_element_name)) { | |
2189 | xmlChar *content; | |
2190 | size_t name_len; | |
2191 | ||
2192 | /* name */ | |
2193 | content = xmlNodeGetContent(perf_attr_node); | |
2194 | if (!content) { | |
2195 | ret = -LTTNG_ERR_NOMEM; | |
2196 | goto end; | |
2197 | } | |
2198 | ||
2199 | name_len = strlen((char *) content); | |
2200 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2201 | WARN("perf context name too long."); | |
2202 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2203 | free(content); | |
2204 | goto end; | |
2205 | } | |
2206 | ||
2207 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2208 | name_len); | |
2209 | free(content); | |
2210 | } | |
2211 | } | |
045fc617 JG |
2212 | } else if (!strcmp((const char *) context_child_node->name, |
2213 | config_element_context_app)) { | |
2214 | /* application context */ | |
2215 | xmlNodePtr app_ctx_node; | |
2216 | ||
2217 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
2218 | for (app_ctx_node = xmlFirstElementChild(context_child_node); | |
2219 | app_ctx_node; app_ctx_node = | |
2220 | xmlNextElementSibling(app_ctx_node)) { | |
2221 | xmlChar *content; | |
2222 | char **target = strcmp( | |
2223 | (const char *) app_ctx_node->name, | |
2224 | config_element_context_app_provider_name) == 0 ? | |
2225 | &context.u.app_ctx.provider_name : | |
2226 | &context.u.app_ctx.ctx_name; | |
2227 | ||
2228 | content = xmlNodeGetContent(app_ctx_node); | |
2229 | if (!content) { | |
2230 | ret = -LTTNG_ERR_NOMEM; | |
2231 | goto end; | |
2232 | } | |
2233 | ||
2234 | *target = (char *) content; | |
2235 | } | |
2236 | } else { | |
2237 | /* Unrecognized context type */ | |
2238 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2239 | goto end; | |
dcf266c0 JG |
2240 | } |
2241 | ||
2242 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
045fc617 JG |
2243 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2244 | free(context.u.app_ctx.provider_name); | |
2245 | free(context.u.app_ctx.ctx_name); | |
2246 | } | |
dcf266c0 JG |
2247 | end: |
2248 | return ret; | |
2249 | } | |
2250 | ||
2251 | static | |
2252 | int process_contexts_node(xmlNodePtr contexts_node, | |
2253 | struct lttng_handle *handle, const char *channel_name) | |
2254 | { | |
2255 | int ret = 0; | |
2256 | xmlNodePtr context_node; | |
2257 | ||
2258 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2259 | context_node = xmlNextElementSibling(context_node)) { | |
2260 | ret = process_context_node(context_node, handle, channel_name); | |
2261 | if (ret) { | |
2262 | goto end; | |
2263 | } | |
2264 | } | |
2265 | end: | |
2266 | return ret; | |
2267 | } | |
2268 | ||
847a5916 JR |
2269 | static |
2270 | int process_pid_tracker_node(xmlNodePtr pid_tracker_node, | |
2271 | struct lttng_handle *handle) | |
2272 | { | |
dd49e13f | 2273 | int ret = 0, child; |
847a5916 JR |
2274 | xmlNodePtr targets_node = NULL; |
2275 | xmlNodePtr node; | |
2276 | ||
2277 | assert(handle); | |
2278 | assert(pid_tracker_node); | |
2279 | /* get the targets node */ | |
2280 | for (node = xmlFirstElementChild(pid_tracker_node); node; | |
2281 | node = xmlNextElementSibling(node)) { | |
2282 | if (!strcmp((const char *) node->name, | |
2283 | config_element_targets)) { | |
2284 | targets_node = node; | |
2285 | break; | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | if (!targets_node) { | |
2290 | ret = LTTNG_ERR_INVALID; | |
2291 | goto end; | |
2292 | } | |
2293 | ||
2294 | /* Go through all pid_target node */ | |
2295 | child = xmlChildElementCount(targets_node); | |
2296 | if (child == 0) { | |
2297 | /* The session is explicitly set to target nothing. */ | |
2298 | ret = lttng_untrack_pid(handle, -1); | |
2299 | if (ret) { | |
2300 | goto end; | |
2301 | } | |
2302 | } | |
2303 | for (node = xmlFirstElementChild(targets_node); node; | |
2304 | node = xmlNextElementSibling(node)) { | |
2305 | xmlNodePtr pid_target_node = node; | |
2306 | ||
2307 | /* get pid node and track it */ | |
2308 | for (node = xmlFirstElementChild(pid_target_node); node; | |
2309 | node = xmlNextElementSibling(node)) { | |
2310 | if (!strcmp((const char *) node->name, | |
2311 | config_element_pid)) { | |
2312 | int64_t pid; | |
2313 | xmlChar *content = NULL; | |
2314 | ||
2315 | content = xmlNodeGetContent(node); | |
2316 | if (!content) { | |
2317 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2318 | goto end; | |
2319 | } | |
2320 | ||
2321 | ret = parse_int(content, &pid); | |
2322 | free(content); | |
2323 | if (ret) { | |
2324 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2325 | goto end; | |
2326 | } | |
2327 | ||
2328 | ret = lttng_track_pid(handle, (int) pid); | |
2329 | if (ret) { | |
2330 | goto end; | |
2331 | } | |
2332 | } | |
2333 | } | |
2334 | node = pid_target_node; | |
2335 | } | |
2336 | ||
2337 | end: | |
2338 | return ret; | |
2339 | } | |
2340 | ||
2341 | ||
dcf266c0 JG |
2342 | static |
2343 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2344 | { | |
2345 | int ret; | |
2346 | struct lttng_domain domain = { 0 }; | |
2347 | struct lttng_handle *handle = NULL; | |
2348 | xmlNodePtr channels_node = NULL; | |
847a5916 JR |
2349 | xmlNodePtr trackers_node = NULL; |
2350 | xmlNodePtr pid_tracker_node = NULL; | |
dcf266c0 JG |
2351 | xmlNodePtr node; |
2352 | ||
2353 | assert(session_name); | |
2354 | ||
2355 | ret = init_domain(domain_node, &domain); | |
2356 | if (ret) { | |
2357 | goto end; | |
2358 | } | |
2359 | ||
2360 | handle = lttng_create_handle(session_name, &domain); | |
2361 | if (!handle) { | |
2362 | ret = -LTTNG_ERR_NOMEM; | |
2363 | goto end; | |
2364 | } | |
2365 | ||
2366 | /* get the channels node */ | |
2367 | for (node = xmlFirstElementChild(domain_node); node; | |
2368 | node = xmlNextElementSibling(node)) { | |
2369 | if (!strcmp((const char *) node->name, | |
2370 | config_element_channels)) { | |
2371 | channels_node = node; | |
2372 | break; | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | if (!channels_node) { | |
2377 | goto end; | |
2378 | } | |
2379 | ||
2380 | /* create all channels */ | |
2381 | for (node = xmlFirstElementChild(channels_node); node; | |
2382 | node = xmlNextElementSibling(node)) { | |
2383 | struct lttng_channel channel; | |
2384 | xmlNodePtr contexts_node = NULL; | |
2385 | xmlNodePtr events_node = NULL; | |
2386 | xmlNodePtr channel_attr_node; | |
2387 | ||
2388 | memset(&channel, 0, sizeof(channel)); | |
2389 | lttng_channel_set_default_attr(&domain, &channel.attr); | |
2390 | ||
2391 | for (channel_attr_node = xmlFirstElementChild(node); | |
2392 | channel_attr_node; channel_attr_node = | |
2393 | xmlNextElementSibling(channel_attr_node)) { | |
2394 | ret = process_channel_attr_node(channel_attr_node, | |
2395 | &channel, &contexts_node, &events_node); | |
2396 | if (ret) { | |
2397 | goto end; | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | ret = lttng_enable_channel(handle, &channel); | |
2402 | if (ret < 0) { | |
2403 | goto end; | |
2404 | } | |
2405 | ||
2406 | ret = process_events_node(events_node, handle, channel.name); | |
2407 | if (ret) { | |
2408 | goto end; | |
2409 | } | |
2410 | ||
2411 | ret = process_contexts_node(contexts_node, handle, | |
2412 | channel.name); | |
2413 | if (ret) { | |
2414 | goto end; | |
2415 | } | |
2416 | } | |
847a5916 JR |
2417 | |
2418 | /* get the trackers node */ | |
2419 | for (node = xmlFirstElementChild(domain_node); node; | |
2420 | node = xmlNextElementSibling(node)) { | |
2421 | if (!strcmp((const char *) node->name, | |
2422 | config_element_trackers)) { | |
2423 | trackers_node = node; | |
2424 | break; | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | if (!trackers_node) { | |
2429 | goto end; | |
2430 | } | |
2431 | ||
2432 | for (node = xmlFirstElementChild(trackers_node); node; | |
2433 | node = xmlNextElementSibling(node)) { | |
2434 | if (!strcmp((const char *)node->name,config_element_pid_tracker)) { | |
2435 | pid_tracker_node = node; | |
2436 | ret = process_pid_tracker_node(pid_tracker_node, handle); | |
2437 | if (ret) { | |
2438 | goto end; | |
2439 | } | |
2440 | } | |
2441 | } | |
2442 | ||
2443 | if (!pid_tracker_node) { | |
2444 | lttng_track_pid(handle, -1); | |
2445 | } | |
2446 | ||
dcf266c0 JG |
2447 | end: |
2448 | lttng_destroy_handle(handle); | |
2449 | return ret; | |
2450 | } | |
2451 | ||
2452 | static | |
2453 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
1b08cbce JR |
2454 | int overwrite, |
2455 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2456 | { |
2457 | int ret, started = -1, snapshot_mode = -1; | |
2458 | uint64_t live_timer_interval = UINT64_MAX; | |
d324faf7 | 2459 | xmlChar *name = NULL; |
9e7c9f56 | 2460 | xmlChar *shm_path = NULL; |
dcf266c0 JG |
2461 | xmlNodePtr domains_node = NULL; |
2462 | xmlNodePtr output_node = NULL; | |
2463 | xmlNodePtr node; | |
2464 | struct lttng_domain *kernel_domain = NULL; | |
2465 | struct lttng_domain *ust_domain = NULL; | |
2466 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2467 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 2468 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
2469 | |
2470 | for (node = xmlFirstElementChild(session_node); node; | |
2471 | node = xmlNextElementSibling(node)) { | |
2472 | if (!name && !strcmp((const char *) node->name, | |
2473 | config_element_name)) { | |
2474 | /* name */ | |
2475 | xmlChar *node_content = xmlNodeGetContent(node); | |
2476 | if (!node_content) { | |
2477 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2478 | goto error; |
dcf266c0 JG |
2479 | } |
2480 | ||
d324faf7 | 2481 | name = node_content; |
dcf266c0 JG |
2482 | } else if (!domains_node && !strcmp((const char *) node->name, |
2483 | config_element_domains)) { | |
2484 | /* domains */ | |
2485 | domains_node = node; | |
2486 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2487 | config_element_started)) { | |
2488 | /* started */ | |
2489 | xmlChar *node_content = xmlNodeGetContent(node); | |
2490 | if (!node_content) { | |
2491 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2492 | goto error; |
dcf266c0 JG |
2493 | } |
2494 | ||
2495 | ret = parse_bool(node_content, &started); | |
2496 | free(node_content); | |
2497 | if (ret) { | |
2498 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2499 | goto error; |
dcf266c0 JG |
2500 | } |
2501 | } else if (!output_node && !strcmp((const char *) node->name, | |
2502 | config_element_output)) { | |
2503 | /* output */ | |
2504 | output_node = node; | |
9e7c9f56 JR |
2505 | } else if (!shm_path && !strcmp((const char *) node->name, |
2506 | config_element_shared_memory_path)) { | |
2507 | /* shared memory path */ | |
2508 | xmlChar *node_content = xmlNodeGetContent(node); | |
2509 | if (!node_content) { | |
2510 | ret = -LTTNG_ERR_NOMEM; | |
2511 | goto error; | |
2512 | } | |
2513 | ||
2514 | shm_path = node_content; | |
dcf266c0 JG |
2515 | } else { |
2516 | /* attributes, snapshot_mode or live_timer_interval */ | |
2517 | xmlNodePtr attributes_child = | |
2518 | xmlFirstElementChild(node); | |
2519 | ||
2520 | if (!strcmp((const char *) attributes_child->name, | |
2521 | config_element_snapshot_mode)) { | |
2522 | /* snapshot_mode */ | |
2523 | xmlChar *snapshot_mode_content = | |
2524 | xmlNodeGetContent(attributes_child); | |
2525 | if (!snapshot_mode_content) { | |
2526 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2527 | goto error; |
dcf266c0 JG |
2528 | } |
2529 | ||
2530 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2531 | free(snapshot_mode_content); | |
2532 | if (ret) { | |
2533 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2534 | goto error; |
dcf266c0 JG |
2535 | } |
2536 | } else { | |
2537 | /* live_timer_interval */ | |
2538 | xmlChar *timer_interval_content = | |
2539 | xmlNodeGetContent(attributes_child); | |
2540 | if (!timer_interval_content) { | |
2541 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2542 | goto error; |
dcf266c0 JG |
2543 | } |
2544 | ||
2545 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2546 | free(timer_interval_content); | |
2547 | if (ret) { | |
2548 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2549 | goto error; |
dcf266c0 JG |
2550 | } |
2551 | } | |
2552 | } | |
2553 | } | |
2554 | ||
2555 | if (!name) { | |
2556 | /* Mandatory attribute, as defined in the session XSD */ | |
2557 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2558 | goto error; |
dcf266c0 JG |
2559 | } |
2560 | ||
d324faf7 | 2561 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 2562 | /* This is not the session we are looking for */ |
c2da8cde DG |
2563 | ret = -LTTNG_ERR_NO_SESSION; |
2564 | goto error; | |
dcf266c0 JG |
2565 | } |
2566 | ||
2567 | /* Init domains to create the session handles */ | |
2568 | for (node = xmlFirstElementChild(domains_node); node; | |
2569 | node = xmlNextElementSibling(node)) { | |
2570 | struct lttng_domain *domain; | |
2571 | ||
2572 | domain = zmalloc(sizeof(*domain)); | |
2573 | if (!domain) { | |
2574 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2575 | goto error; |
dcf266c0 JG |
2576 | } |
2577 | ||
2578 | ret = init_domain(node, domain); | |
2579 | if (ret) { | |
2580 | goto domain_init_error; | |
2581 | } | |
2582 | ||
2583 | switch (domain->type) { | |
2584 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2585 | if (kernel_domain) { |
2586 | /* Same domain seen twice, invalid! */ | |
2587 | goto domain_init_error; | |
2588 | } | |
dcf266c0 JG |
2589 | kernel_domain = domain; |
2590 | break; | |
2591 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2592 | if (ust_domain) { |
2593 | /* Same domain seen twice, invalid! */ | |
2594 | goto domain_init_error; | |
2595 | } | |
dcf266c0 JG |
2596 | ust_domain = domain; |
2597 | break; | |
2598 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2599 | if (jul_domain) { |
2600 | /* Same domain seen twice, invalid! */ | |
2601 | goto domain_init_error; | |
2602 | } | |
dcf266c0 JG |
2603 | jul_domain = domain; |
2604 | break; | |
5cdb6027 DG |
2605 | case LTTNG_DOMAIN_LOG4J: |
2606 | if (log4j_domain) { | |
2607 | /* Same domain seen twice, invalid! */ | |
2608 | goto domain_init_error; | |
2609 | } | |
2610 | log4j_domain = domain; | |
2611 | break; | |
0e115563 DG |
2612 | case LTTNG_DOMAIN_PYTHON: |
2613 | if (python_domain) { | |
2614 | /* Same domain seen twice, invalid! */ | |
2615 | goto domain_init_error; | |
2616 | } | |
2617 | python_domain = domain; | |
2618 | break; | |
dcf266c0 JG |
2619 | default: |
2620 | WARN("Invalid domain type"); | |
2621 | goto domain_init_error; | |
2622 | } | |
2623 | continue; | |
2624 | domain_init_error: | |
2625 | free(domain); | |
2626 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2627 | goto error; |
dcf266c0 JG |
2628 | } |
2629 | ||
2aaf5fc7 JR |
2630 | /* Apply overrides */ |
2631 | if (overrides) { | |
2632 | if (overrides->session_name) { | |
2633 | xmlChar *name_override = xmlStrdup(BAD_CAST(overrides->session_name)); | |
2634 | if (!name_override) { | |
2635 | ret = -LTTNG_ERR_NOMEM; | |
2636 | goto error; | |
2637 | } | |
2638 | ||
2639 | /* Overrides the session name to the provided name */ | |
2640 | xmlFree(name); | |
2641 | name = name_override; | |
2642 | } | |
2643 | } | |
2644 | ||
40b4155f | 2645 | if (overwrite) { |
dcf266c0 | 2646 | /* Destroy session if it exists */ |
d324faf7 | 2647 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
2648 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
2649 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2650 | goto error; |
dcf266c0 JG |
2651 | } |
2652 | } | |
2653 | ||
2654 | /* Create session type depending on output type */ | |
2655 | if (snapshot_mode && snapshot_mode != -1) { | |
1b08cbce JR |
2656 | ret = create_snapshot_session((const char *) name, output_node, |
2657 | overrides); | |
dcf266c0 JG |
2658 | } else if (live_timer_interval && |
2659 | live_timer_interval != UINT64_MAX) { | |
d324faf7 JG |
2660 | ret = create_session((const char *) name, kernel_domain, |
2661 | ust_domain, jul_domain, log4j_domain, | |
1b08cbce | 2662 | output_node, live_timer_interval, overrides); |
dcf266c0 JG |
2663 | } else { |
2664 | /* regular session */ | |
d324faf7 JG |
2665 | ret = create_session((const char *) name, kernel_domain, |
2666 | ust_domain, jul_domain, log4j_domain, | |
1b08cbce | 2667 | output_node, UINT64_MAX, overrides); |
dcf266c0 | 2668 | } |
dcf266c0 | 2669 | if (ret) { |
c2da8cde | 2670 | goto error; |
dcf266c0 JG |
2671 | } |
2672 | ||
9e7c9f56 JR |
2673 | if (shm_path) { |
2674 | ret = lttng_set_session_shm_path((const char *) name, | |
d324faf7 | 2675 | (const char *) shm_path); |
9e7c9f56 JR |
2676 | if (ret) { |
2677 | goto error; | |
2678 | } | |
2679 | } | |
2680 | ||
dcf266c0 JG |
2681 | for (node = xmlFirstElementChild(domains_node); node; |
2682 | node = xmlNextElementSibling(node)) { | |
d324faf7 | 2683 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
2684 | if (ret) { |
2685 | goto end; | |
2686 | } | |
2687 | } | |
2688 | ||
2689 | if (started) { | |
d324faf7 | 2690 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
2691 | if (ret) { |
2692 | goto end; | |
2693 | } | |
2694 | } | |
c2da8cde | 2695 | |
dcf266c0 | 2696 | end: |
b2579dc1 | 2697 | if (ret < 0) { |
d324faf7 JG |
2698 | ERR("Failed to load session %s: %s", (const char *) name, |
2699 | lttng_strerror(ret)); | |
2700 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
2701 | } |
2702 | ||
c2da8cde | 2703 | error: |
dcf266c0 JG |
2704 | free(kernel_domain); |
2705 | free(ust_domain); | |
2706 | free(jul_domain); | |
5cdb6027 | 2707 | free(log4j_domain); |
135a3893 | 2708 | free(python_domain); |
d324faf7 | 2709 | xmlFree(name); |
9e7c9f56 | 2710 | xmlFree(shm_path); |
dcf266c0 JG |
2711 | return ret; |
2712 | } | |
2713 | ||
cf53c06d DG |
2714 | /* |
2715 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2716 | * Return -1 if the path is EPERM. | |
2717 | */ | |
2718 | static int validate_file_read_creds(const char *path) | |
2719 | { | |
2720 | int ret; | |
2721 | ||
2722 | assert(path); | |
2723 | ||
2724 | /* Can we read the file. */ | |
2725 | ret = access(path, R_OK); | |
2726 | if (!ret) { | |
2727 | goto valid; | |
2728 | } | |
2729 | if (errno == EACCES) { | |
2730 | return -1; | |
2731 | } else { | |
2732 | /* Invalid. */ | |
2733 | return 0; | |
2734 | } | |
2735 | valid: | |
2736 | return 1; | |
2737 | } | |
2738 | ||
dcf266c0 JG |
2739 | static |
2740 | int load_session_from_file(const char *path, const char *session_name, | |
1b08cbce JR |
2741 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
2742 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2743 | { |
2744 | int ret, session_found = !session_name; | |
2745 | xmlDocPtr doc = NULL; | |
2746 | xmlNodePtr sessions_node; | |
2747 | xmlNodePtr session_node; | |
dcf266c0 JG |
2748 | |
2749 | assert(path); | |
2750 | assert(validation_ctx); | |
2751 | ||
cf53c06d DG |
2752 | ret = validate_file_read_creds(path); |
2753 | if (ret != 1) { | |
2754 | if (ret == -1) { | |
2755 | ret = -LTTNG_ERR_EPERM; | |
2756 | } else { | |
2757 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2758 | } | |
dcf266c0 JG |
2759 | goto end; |
2760 | } | |
2761 | ||
2762 | doc = xmlParseFile(path); | |
2763 | if (!doc) { | |
2764 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2765 | goto end; | |
2766 | } | |
2767 | ||
2768 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2769 | if (ret) { | |
2770 | ERR("Session configuration file validation failed"); | |
2771 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2772 | goto end; | |
2773 | } | |
2774 | ||
2775 | sessions_node = xmlDocGetRootElement(doc); | |
2776 | if (!sessions_node) { | |
2777 | goto end; | |
2778 | } | |
2779 | ||
2780 | for (session_node = xmlFirstElementChild(sessions_node); | |
2781 | session_node; session_node = | |
2782 | xmlNextElementSibling(session_node)) { | |
2783 | ret = process_session_node(session_node, | |
1b08cbce | 2784 | session_name, overwrite, overrides); |
dcf266c0 JG |
2785 | if (session_name && ret == 0) { |
2786 | /* Target session found and loaded */ | |
2787 | session_found = 1; | |
2788 | break; | |
2789 | } | |
2790 | } | |
2791 | end: | |
2792 | xmlFreeDoc(doc); | |
2793 | if (!ret) { | |
a96bc65d | 2794 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2795 | } |
2796 | return ret; | |
2797 | } | |
2798 | ||
60f70355 JG |
2799 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
2800 | static | |
2801 | struct dirent *alloc_dirent(const char *path) | |
2802 | { | |
2803 | size_t len; | |
2804 | long name_max; | |
2805 | struct dirent *entry; | |
2806 | ||
2807 | name_max = pathconf(path, _PC_NAME_MAX); | |
2808 | if (name_max == -1) { | |
2809 | name_max = PATH_MAX; | |
2810 | } | |
2811 | len = offsetof(struct dirent, d_name) + name_max + 1; | |
2812 | entry = zmalloc(len); | |
2813 | return entry; | |
2814 | } | |
2815 | ||
dcf266c0 JG |
2816 | static |
2817 | int load_session_from_path(const char *path, const char *session_name, | |
1b08cbce JR |
2818 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
2819 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2820 | { |
2821 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2822 | DIR *directory = NULL; |
2823 | ||
2824 | assert(path); | |
2825 | assert(validation_ctx); | |
2826 | ||
4af16958 DG |
2827 | directory = opendir(path); |
2828 | if (!directory) { | |
11143783 DG |
2829 | switch (errno) { |
2830 | case ENOTDIR: | |
0f0a81b5 DG |
2831 | /* Try the file loading. */ |
2832 | break; | |
11143783 DG |
2833 | case ENOENT: |
2834 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2835 | goto end; | |
2836 | default: | |
0f0a81b5 DG |
2837 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2838 | goto end; | |
4af16958 | 2839 | } |
dcf266c0 | 2840 | } |
4af16958 | 2841 | if (directory) { |
dcf266c0 JG |
2842 | struct dirent *entry; |
2843 | struct dirent *result; | |
2844 | char *file_path = NULL; | |
2845 | size_t path_len = strlen(path); | |
2846 | ||
2847 | if (path_len >= PATH_MAX) { | |
2848 | ret = -LTTNG_ERR_INVALID; | |
2849 | goto end; | |
2850 | } | |
2851 | ||
60f70355 | 2852 | entry = alloc_dirent(path); |
dcf266c0 JG |
2853 | if (!entry) { |
2854 | ret = -LTTNG_ERR_NOMEM; | |
2855 | goto end; | |
2856 | } | |
2857 | ||
dcf266c0 JG |
2858 | file_path = zmalloc(PATH_MAX); |
2859 | if (!file_path) { | |
2860 | ret = -LTTNG_ERR_NOMEM; | |
2861 | free(entry); | |
2862 | goto end; | |
2863 | } | |
2864 | ||
2865 | strncpy(file_path, path, path_len); | |
2866 | if (file_path[path_len - 1] != '/') { | |
2867 | file_path[path_len++] = '/'; | |
2868 | } | |
2869 | ||
4af16958 | 2870 | ret = 0; |
dcf266c0 JG |
2871 | /* Search for *.lttng files */ |
2872 | while (!readdir_r(directory, entry, &result) && result) { | |
2873 | size_t file_name_len = strlen(result->d_name); | |
2874 | ||
2875 | if (file_name_len <= | |
2876 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2877 | continue; | |
2878 | } | |
2879 | ||
431f702e | 2880 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2881 | continue; |
2882 | } | |
2883 | ||
2884 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2885 | result->d_name + file_name_len - sizeof( | |
2886 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2887 | continue; | |
2888 | } | |
2889 | ||
2890 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2891 | file_path[path_len + file_name_len] = '\0'; | |
2892 | ||
2893 | ret = load_session_from_file(file_path, session_name, | |
1b08cbce | 2894 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
2895 | if (session_name && !ret) { |
2896 | session_found = 1; | |
2897 | break; | |
2898 | } | |
2899 | } | |
2900 | ||
2901 | free(entry); | |
2902 | free(file_path); | |
2903 | } else { | |
2904 | ret = load_session_from_file(path, session_name, | |
1b08cbce | 2905 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
2906 | if (ret) { |
2907 | goto end; | |
2908 | } else { | |
2909 | session_found = 1; | |
2910 | } | |
2911 | } | |
2912 | ||
2913 | end: | |
2914 | if (directory) { | |
2915 | if (closedir(directory)) { | |
2916 | PERROR("closedir"); | |
2917 | } | |
2918 | } | |
2919 | ||
464133ea | 2920 | if (session_found && !ret) { |
6c66fa0f | 2921 | ret = 0; |
dcf266c0 JG |
2922 | } |
2923 | ||
2924 | return ret; | |
2925 | } | |
2926 | ||
ab38c13f DG |
2927 | /* |
2928 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 2929 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
2930 | */ |
2931 | static int validate_path_creds(const char *path) | |
2932 | { | |
2933 | int ret, uid = getuid(); | |
2934 | struct stat buf; | |
2935 | ||
2936 | assert(path); | |
2937 | ||
cf53c06d | 2938 | if (uid == 0) { |
ab38c13f DG |
2939 | goto valid; |
2940 | } | |
2941 | ||
2942 | ret = stat(path, &buf); | |
2943 | if (ret < 0) { | |
2944 | if (errno != ENOENT) { | |
2945 | PERROR("stat"); | |
2946 | } | |
2947 | ret = -LTTNG_ERR_INVALID; | |
2948 | goto valid; | |
2949 | } | |
2950 | ||
2951 | if (buf.st_uid != uid) { | |
2952 | goto invalid; | |
2953 | } | |
2954 | ||
2955 | valid: | |
ab38c13f | 2956 | return 1; |
cf53c06d DG |
2957 | invalid: |
2958 | return 0; | |
ab38c13f DG |
2959 | } |
2960 | ||
dcf266c0 JG |
2961 | LTTNG_HIDDEN |
2962 | int config_load_session(const char *path, const char *session_name, | |
1b08cbce JR |
2963 | int overwrite, unsigned int autoload, |
2964 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2965 | { |
2966 | int ret; | |
6c66fa0f | 2967 | bool session_loaded = false; |
cf53c06d | 2968 | const char *path_ptr = NULL; |
dcf266c0 JG |
2969 | struct session_config_validation_ctx validation_ctx = { 0 }; |
2970 | ||
2971 | ret = init_session_config_validation_ctx(&validation_ctx); | |
2972 | if (ret) { | |
2973 | goto end; | |
2974 | } | |
2975 | ||
2976 | if (!path) { | |
ab38c13f DG |
2977 | char *home_path; |
2978 | const char *sys_path; | |
2979 | ||
dcf266c0 | 2980 | /* Try home path */ |
ab38c13f | 2981 | home_path = utils_get_home_dir(); |
dcf266c0 | 2982 | if (home_path) { |
ab38c13f | 2983 | char path[PATH_MAX]; |
dcf266c0 | 2984 | |
d4fcf703 DG |
2985 | /* |
2986 | * Try user session configuration path. Ignore error here so we can | |
2987 | * continue loading the system wide sessions. | |
2988 | */ | |
ab38c13f DG |
2989 | if (autoload) { |
2990 | ret = snprintf(path, sizeof(path), | |
2991 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
2992 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
2993 | if (ret < 0) { |
2994 | PERROR("snprintf session autoload home config path"); | |
2995 | goto end; | |
2996 | } | |
2997 | ||
2998 | /* | |
2999 | * Credentials are only validated for the autoload in order to | |
3000 | * avoid any user session daemon to try to load kernel sessions | |
3001 | * automatically and failing all the times. | |
3002 | */ | |
3003 | ret = validate_path_creds(path); | |
3004 | if (ret) { | |
3005 | path_ptr = path; | |
3006 | } | |
ab38c13f DG |
3007 | } else { |
3008 | ret = snprintf(path, sizeof(path), | |
3009 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
3010 | if (ret < 0) { |
3011 | PERROR("snprintf session home config path"); | |
3012 | goto end; | |
3013 | } | |
3014 | path_ptr = path; | |
ab38c13f | 3015 | } |
cf53c06d DG |
3016 | if (path_ptr) { |
3017 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3018 | &validation_ctx, overwrite, overrides); |
d4fcf703 DG |
3019 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
3020 | goto end; | |
3021 | } | |
3022 | /* | |
3023 | * Continue even if the session was found since we have to try | |
3024 | * the system wide sessions. | |
3025 | */ | |
6c66fa0f | 3026 | session_loaded = true; |
ab38c13f | 3027 | } |
d4fcf703 | 3028 | } |
ab38c13f | 3029 | |
cf53c06d DG |
3030 | /* Reset path pointer for the system wide dir. */ |
3031 | path_ptr = NULL; | |
3032 | ||
d4fcf703 DG |
3033 | /* Try system wide configuration directory. */ |
3034 | if (autoload) { | |
3035 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
3036 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
3037 | ret = validate_path_creds(sys_path); |
3038 | if (ret) { | |
3039 | path_ptr = sys_path; | |
3040 | } | |
d4fcf703 | 3041 | } else { |
cf53c06d DG |
3042 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
3043 | path_ptr = sys_path; | |
d4fcf703 DG |
3044 | } |
3045 | ||
cf53c06d DG |
3046 | if (path_ptr) { |
3047 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3048 | &validation_ctx, overwrite, overrides); |
6c66fa0f JG |
3049 | if (!ret) { |
3050 | session_loaded = true; | |
3051 | } | |
dcf266c0 JG |
3052 | } |
3053 | } else { | |
3054 | ret = access(path, F_OK); | |
3055 | if (ret < 0) { | |
3056 | PERROR("access"); | |
3057 | switch (errno) { | |
3058 | case ENOENT: | |
3059 | ret = -LTTNG_ERR_INVALID; | |
3060 | WARN("Session configuration path does not exist."); | |
3061 | break; | |
3062 | case EACCES: | |
3063 | ret = -LTTNG_ERR_EPERM; | |
3064 | break; | |
3065 | default: | |
3066 | ret = -LTTNG_ERR_UNK; | |
3067 | break; | |
3068 | } | |
3069 | goto end; | |
3070 | } | |
3071 | ||
3072 | ret = load_session_from_path(path, session_name, | |
1b08cbce | 3073 | &validation_ctx, overwrite, overrides); |
dcf266c0 JG |
3074 | } |
3075 | end: | |
3076 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
3077 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
3078 | /* | |
3079 | * Don't report an error if no sessions are found when called | |
3080 | * without a session_name or a search path. | |
3081 | */ | |
3082 | ret = 0; | |
3083 | } | |
6c66fa0f JG |
3084 | |
3085 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
3086 | /* A matching session was found in one of the search paths. */ | |
3087 | ret = 0; | |
3088 | } | |
dcf266c0 JG |
3089 | return ret; |
3090 | } | |
56766c75 JG |
3091 | |
3092 | static | |
3093 | void __attribute__((destructor)) session_config_exit(void) | |
3094 | { | |
3095 | xmlCleanupParser(); | |
3096 | } |