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"; | |
cf0bcb51 | 94 | const char * const config_element_monitor_timer_interval = "monitor_timer_interval"; |
fb198a11 JG |
95 | const char * const config_element_output = "output"; |
96 | const char * const config_element_output_type = "output_type"; | |
97 | const char * const config_element_tracefile_size = "tracefile_size"; | |
98 | const char * const config_element_tracefile_count = "tracefile_count"; | |
99 | const char * const config_element_live_timer_interval = "live_timer_interval"; | |
ec2ed7da JG |
100 | LTTNG_HIDDEN const char * const config_element_discarded_events = "discarded_events"; |
101 | LTTNG_HIDDEN const char * const config_element_lost_packets = "lost_packets"; | |
fb198a11 JG |
102 | const char * const config_element_type = "type"; |
103 | const char * const config_element_buffer_type = "buffer_type"; | |
104 | const char * const config_element_session = "session"; | |
105 | const char * const config_element_sessions = "sessions"; | |
ec2ed7da JG |
106 | LTTNG_HIDDEN const char * const config_element_context_perf = "perf"; |
107 | LTTNG_HIDDEN const char * const config_element_context_app = "app"; | |
108 | LTTNG_HIDDEN const char * const config_element_context_app_provider_name = "provider_name"; | |
109 | LTTNG_HIDDEN const char * const config_element_context_app_ctx_name = "ctx_name"; | |
fb198a11 JG |
110 | const char * const config_element_config = "config"; |
111 | const char * const config_element_started = "started"; | |
112 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
113 | const char * const config_element_loglevel = "loglevel"; | |
114 | const char * const config_element_loglevel_type = "loglevel_type"; | |
115 | const char * const config_element_filter = "filter"; | |
ec2ed7da | 116 | LTTNG_HIDDEN const char * const config_element_filter_expression = "filter_expression"; |
fb198a11 JG |
117 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; |
118 | const char * const config_element_consumer_output = "consumer_output"; | |
119 | const char * const config_element_destination = "destination"; | |
120 | const char * const config_element_path = "path"; | |
121 | const char * const config_element_net_output = "net_output"; | |
122 | const char * const config_element_control_uri = "control_uri"; | |
123 | const char * const config_element_data_uri = "data_uri"; | |
124 | const char * const config_element_max_size = "max_size"; | |
ccf10263 MD |
125 | const char * const config_element_pid = "pid"; |
126 | const char * const config_element_pids = "pids"; | |
9e7c9f56 | 127 | const char * const config_element_shared_memory_path = "shared_memory_path"; |
ebbf5ab7 JR |
128 | const char * const config_element_pid_tracker = "pid_tracker"; |
129 | const char * const config_element_trackers = "trackers"; | |
847a5916 JR |
130 | const char * const config_element_targets = "targets"; |
131 | const char * const config_element_target_pid = "pid_target"; | |
fb198a11 JG |
132 | |
133 | const char * const config_domain_type_kernel = "KERNEL"; | |
134 | const char * const config_domain_type_ust = "UST"; | |
135 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 136 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 137 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
138 | |
139 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
140 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
141 | const char * const config_buffer_type_global = "GLOBAL"; | |
142 | ||
143 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
144 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
145 | ||
146 | const char * const config_output_type_splice = "SPLICE"; | |
147 | const char * const config_output_type_mmap = "MMAP"; | |
148 | ||
149 | const char * const config_loglevel_type_all = "ALL"; | |
150 | const char * const config_loglevel_type_range = "RANGE"; | |
151 | const char * const config_loglevel_type_single = "SINGLE"; | |
152 | ||
153 | const char * const config_event_type_all = "ALL"; | |
154 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
155 | const char * const config_event_type_probe = "PROBE"; | |
156 | const char * const config_event_type_function = "FUNCTION"; | |
157 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
158 | const char * const config_event_type_noop = "NOOP"; | |
159 | const char * const config_event_type_syscall = "SYSCALL"; | |
160 | const char * const config_event_type_kprobe = "KPROBE"; | |
161 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
162 | ||
163 | const char * const config_event_context_pid = "PID"; | |
164 | const char * const config_event_context_procname = "PROCNAME"; | |
165 | const char * const config_event_context_prio = "PRIO"; | |
166 | const char * const config_event_context_nice = "NICE"; | |
167 | const char * const config_event_context_vpid = "VPID"; | |
168 | const char * const config_event_context_tid = "TID"; | |
169 | const char * const config_event_context_vtid = "VTID"; | |
170 | const char * const config_event_context_ppid = "PPID"; | |
171 | const char * const config_event_context_vppid = "VPPID"; | |
172 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
173 | const char * const config_event_context_hostname = "HOSTNAME"; | |
174 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 175 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
ec2ed7da JG |
176 | LTTNG_HIDDEN const char * const config_event_context_app = "APP"; |
177 | LTTNG_HIDDEN const char * const config_event_context_interruptible = "INTERRUPTIBLE"; | |
178 | LTTNG_HIDDEN const char * const config_event_context_preemptible = "PREEMPTIBLE"; | |
179 | LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE"; | |
180 | LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; | |
fb198a11 | 181 | |
fbd987c9 JG |
182 | /* Deprecated symbols */ |
183 | const char * const config_element_perf; | |
184 | ||
d7b645e2 JR |
185 | enum process_event_node_phase { |
186 | CREATION = 0, | |
187 | ENABLE = 1, | |
188 | }; | |
189 | ||
dcf266c0 JG |
190 | struct consumer_output { |
191 | int enabled; | |
192 | char *path; | |
193 | char *control_uri; | |
194 | char *data_uri; | |
195 | }; | |
196 | ||
1501a7f3 JG |
197 | static int config_entry_handler_filter(struct handler_filter_args *args, |
198 | const char *section, const char *name, const char *value) | |
199 | { | |
200 | int ret = 0; | |
201 | struct config_entry entry = { section, name, value }; | |
202 | ||
203 | assert(args); | |
204 | ||
205 | if (!section || !name || !value) { | |
206 | ret = -EIO; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | if (args->section) { | |
211 | if (strcmp(args->section, section)) { | |
212 | goto end; | |
213 | } | |
214 | } | |
215 | ||
216 | ret = args->handler(&entry, args->user_data); | |
217 | end: | |
218 | return ret; | |
219 | } | |
220 | ||
221 | LTTNG_HIDDEN | |
222 | int config_get_section_entries(const char *override_path, const char *section, | |
223 | config_entry_handler_cb handler, void *user_data) | |
224 | { | |
225 | int ret = 0; | |
7ab02a27 | 226 | char *path; |
1501a7f3 JG |
227 | FILE *config_file = NULL; |
228 | struct handler_filter_args filter = { section, handler, user_data }; | |
229 | ||
7ab02a27 DG |
230 | /* First, try system-wide conf. file. */ |
231 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
232 | ||
233 | config_file = fopen(path, "r"); | |
234 | if (config_file) { | |
235 | DBG("Loading daemon conf file at %s", path); | |
236 | /* | |
237 | * Return value is not very important here since error or not, we | |
238 | * continue and try the next possible conf. file. | |
239 | */ | |
240 | (void) ini_parse_file(config_file, | |
241 | (ini_entry_handler) config_entry_handler_filter, | |
242 | (void *) &filter); | |
243 | fclose(config_file); | |
244 | } | |
245 | ||
246 | /* Second is the user local configuration. */ | |
247 | path = utils_get_home_dir(); | |
248 | if (path) { | |
249 | char fullpath[PATH_MAX]; | |
250 | ||
251 | ret = snprintf(fullpath, sizeof(fullpath), | |
252 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
253 | if (ret < 0) { | |
254 | PERROR("snprintf user conf. path"); | |
255 | goto error; | |
256 | } | |
257 | ||
258 | config_file = fopen(fullpath, "r"); | |
259 | if (config_file) { | |
260 | DBG("Loading daemon user conf file at %s", path); | |
261 | /* | |
262 | * Return value is not very important here since error or not, we | |
263 | * continue and try the next possible conf. file. | |
264 | */ | |
265 | (void) ini_parse_file(config_file, | |
266 | (ini_entry_handler) config_entry_handler_filter, | |
267 | (void *) &filter); | |
268 | fclose(config_file); | |
269 | } | |
270 | } | |
271 | ||
272 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
273 | if (override_path) { |
274 | config_file = fopen(override_path, "r"); | |
275 | if (config_file) { | |
7ab02a27 DG |
276 | DBG("Loading daemon command line conf file at %s", override_path); |
277 | (void) ini_parse_file(config_file, | |
278 | (ini_entry_handler) config_entry_handler_filter, | |
279 | (void *) &filter); | |
280 | fclose(config_file); | |
1501a7f3 JG |
281 | } else { |
282 | ERR("Failed to open daemon configuration file at %s", | |
283 | override_path); | |
284 | ret = -ENOENT; | |
7ab02a27 | 285 | goto error; |
1501a7f3 JG |
286 | } |
287 | } | |
288 | ||
7ab02a27 DG |
289 | /* Everything went well. */ |
290 | ret = 0; | |
1501a7f3 | 291 | |
7ab02a27 | 292 | error: |
1501a7f3 JG |
293 | return ret; |
294 | } | |
295 | ||
296 | LTTNG_HIDDEN | |
297 | int config_parse_value(const char *value) | |
298 | { | |
299 | int i, ret = 0; | |
300 | char *endptr, *lower_str; | |
301 | size_t len; | |
302 | unsigned long v; | |
303 | ||
304 | len = strlen(value); | |
305 | if (!len) { | |
306 | ret = -1; | |
307 | goto end; | |
308 | } | |
309 | ||
310 | v = strtoul(value, &endptr, 10); | |
311 | if (endptr != value) { | |
312 | ret = v; | |
313 | goto end; | |
314 | } | |
315 | ||
316 | lower_str = zmalloc(len + 1); | |
317 | if (!lower_str) { | |
318 | PERROR("zmalloc"); | |
319 | ret = -errno; | |
320 | goto end; | |
321 | } | |
322 | ||
323 | for (i = 0; i < len; i++) { | |
324 | lower_str[i] = tolower(value[i]); | |
325 | } | |
326 | ||
327 | if (!strcmp(lower_str, config_str_yes) || | |
328 | !strcmp(lower_str, config_str_true) || | |
329 | !strcmp(lower_str, config_str_on)) { | |
330 | ret = 1; | |
331 | } else if (!strcmp(lower_str, config_str_no) || | |
332 | !strcmp(lower_str, config_str_false) || | |
333 | !strcmp(lower_str, config_str_off)) { | |
334 | ret = 0; | |
335 | } else { | |
336 | ret = -1; | |
337 | } | |
338 | ||
339 | free(lower_str); | |
340 | end: | |
341 | return ret; | |
342 | } | |
36f2332b JG |
343 | |
344 | /* | |
345 | * Returns a xmlChar string which must be released using xmlFree(). | |
346 | */ | |
347 | static xmlChar *encode_string(const char *in_str) | |
348 | { | |
349 | xmlChar *out_str = NULL; | |
350 | xmlCharEncodingHandlerPtr handler; | |
351 | int out_len, ret, in_len; | |
352 | ||
353 | assert(in_str); | |
354 | ||
355 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
356 | if (!handler) { | |
357 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
358 | goto end; | |
359 | } | |
360 | ||
361 | in_len = strlen(in_str); | |
362 | /* | |
f76d886f JG |
363 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
364 | * used because UTF-8 characters can take up to 4 bytes. | |
36f2332b | 365 | */ |
f76d886f | 366 | out_len = (in_len * 4) + 1; |
36f2332b JG |
367 | out_str = xmlMalloc(out_len); |
368 | if (!out_str) { | |
369 | goto end; | |
370 | } | |
371 | ||
372 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
373 | if (ret < 0) { | |
374 | xmlFree(out_str); | |
375 | out_str = NULL; | |
376 | goto end; | |
377 | } | |
378 | ||
379 | /* out_len is now the size of out_str */ | |
380 | out_str[out_len] = '\0'; | |
381 | end: | |
382 | return out_str; | |
383 | } | |
384 | ||
385 | LTTNG_HIDDEN | |
705bb62f | 386 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
387 | { |
388 | int ret; | |
389 | struct config_writer *writer; | |
390 | xmlOutputBufferPtr buffer; | |
391 | ||
392 | writer = zmalloc(sizeof(struct config_writer)); | |
393 | if (!writer) { | |
394 | PERROR("zmalloc config_writer_create"); | |
395 | goto end; | |
396 | } | |
397 | ||
398 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
399 | if (!buffer) { | |
400 | goto error_destroy; | |
401 | } | |
402 | ||
403 | writer->writer = xmlNewTextWriter(buffer); | |
404 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
405 | config_xml_encoding, NULL); | |
406 | if (ret < 0) { | |
407 | goto error_destroy; | |
408 | } | |
409 | ||
410 | ret = xmlTextWriterSetIndentString(writer->writer, | |
411 | BAD_CAST config_xml_indent_string); | |
705bb62f | 412 | if (ret) { |
36f2332b JG |
413 | goto error_destroy; |
414 | } | |
415 | ||
705bb62f JRJ |
416 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
417 | if (ret) { | |
36f2332b JG |
418 | goto error_destroy; |
419 | } | |
420 | ||
421 | end: | |
422 | return writer; | |
423 | error_destroy: | |
424 | config_writer_destroy(writer); | |
425 | return NULL; | |
426 | } | |
427 | ||
428 | LTTNG_HIDDEN | |
429 | int config_writer_destroy(struct config_writer *writer) | |
430 | { | |
431 | int ret = 0; | |
432 | ||
433 | if (!writer) { | |
434 | ret = -EINVAL; | |
435 | goto end; | |
436 | } | |
437 | ||
438 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
439 | WARN("Could not close XML document"); | |
440 | ret = -EIO; | |
441 | } | |
442 | ||
443 | if (writer->writer) { | |
444 | xmlFreeTextWriter(writer->writer); | |
445 | } | |
446 | ||
447 | free(writer); | |
448 | end: | |
449 | return ret; | |
450 | } | |
451 | ||
452 | LTTNG_HIDDEN | |
453 | int config_writer_open_element(struct config_writer *writer, | |
454 | const char *element_name) | |
455 | { | |
456 | int ret; | |
457 | xmlChar *encoded_element_name; | |
458 | ||
459 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
460 | ret = -1; | |
461 | goto end; | |
462 | } | |
463 | ||
464 | encoded_element_name = encode_string(element_name); | |
465 | if (!encoded_element_name) { | |
466 | ret = -1; | |
467 | goto end; | |
468 | } | |
469 | ||
470 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
471 | xmlFree(encoded_element_name); | |
472 | end: | |
28676a1d | 473 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
474 | } |
475 | ||
e10b6a1c JG |
476 | LTTNG_HIDDEN |
477 | int config_writer_write_attribute(struct config_writer *writer, | |
478 | const char *name, const char *value) | |
479 | { | |
480 | int ret; | |
481 | xmlChar *encoded_name = NULL; | |
482 | xmlChar *encoded_value = NULL; | |
483 | ||
484 | if (!writer || !writer->writer || !name || !name[0]) { | |
485 | ret = -1; | |
486 | goto end; | |
487 | } | |
488 | ||
489 | encoded_name = encode_string(name); | |
490 | if (!encoded_name) { | |
491 | ret = -1; | |
492 | goto end; | |
493 | } | |
494 | ||
495 | encoded_value = encode_string(value); | |
496 | if (!encoded_value) { | |
497 | ret = -1; | |
498 | goto end; | |
499 | } | |
500 | ||
501 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, | |
502 | encoded_value); | |
503 | end: | |
504 | xmlFree(encoded_name); | |
505 | xmlFree(encoded_value); | |
506 | return ret >= 0 ? 0 : ret; | |
507 | } | |
508 | ||
36f2332b JG |
509 | LTTNG_HIDDEN |
510 | int config_writer_close_element(struct config_writer *writer) | |
511 | { | |
512 | int ret; | |
513 | ||
514 | if (!writer || !writer->writer) { | |
515 | ret = -1; | |
516 | goto end; | |
517 | } | |
518 | ||
519 | ret = xmlTextWriterEndElement(writer->writer); | |
520 | end: | |
28676a1d | 521 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
522 | } |
523 | ||
524 | LTTNG_HIDDEN | |
525 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
526 | const char *element_name, uint64_t value) | |
527 | { | |
528 | int ret; | |
529 | xmlChar *encoded_element_name; | |
530 | ||
531 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
532 | ret = -1; | |
533 | goto end; | |
534 | } | |
535 | ||
536 | encoded_element_name = encode_string(element_name); | |
537 | if (!encoded_element_name) { | |
538 | ret = -1; | |
539 | goto end; | |
540 | } | |
541 | ||
542 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
543 | encoded_element_name, "%" PRIu64, value); | |
544 | xmlFree(encoded_element_name); | |
545 | end: | |
28676a1d | 546 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
547 | } |
548 | ||
549 | LTTNG_HIDDEN | |
550 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
551 | const char *element_name, int64_t value) | |
552 | { | |
553 | int ret; | |
554 | xmlChar *encoded_element_name; | |
555 | ||
556 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
557 | ret = -1; | |
558 | goto end; | |
559 | } | |
560 | ||
561 | encoded_element_name = encode_string(element_name); | |
562 | if (!encoded_element_name) { | |
563 | ret = -1; | |
564 | goto end; | |
565 | } | |
566 | ||
567 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
568 | encoded_element_name, "%" PRIi64, value); | |
569 | xmlFree(encoded_element_name); | |
570 | end: | |
28676a1d | 571 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
572 | } |
573 | ||
574 | LTTNG_HIDDEN | |
575 | int config_writer_write_element_bool(struct config_writer *writer, | |
576 | const char *element_name, int value) | |
577 | { | |
578 | return config_writer_write_element_string(writer, element_name, | |
579 | value ? config_xml_true : config_xml_false); | |
580 | } | |
581 | ||
582 | LTTNG_HIDDEN | |
583 | int config_writer_write_element_string(struct config_writer *writer, | |
584 | const char *element_name, const char *value) | |
585 | { | |
586 | int ret; | |
587 | xmlChar *encoded_element_name = NULL; | |
588 | xmlChar *encoded_value = NULL; | |
589 | ||
590 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
591 | !value) { | |
592 | ret = -1; | |
593 | goto end; | |
594 | } | |
595 | ||
596 | encoded_element_name = encode_string(element_name); | |
597 | if (!encoded_element_name) { | |
598 | ret = -1; | |
599 | goto end; | |
600 | } | |
601 | ||
602 | encoded_value = encode_string(value); | |
603 | if (!encoded_value) { | |
604 | ret = -1; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 609 | encoded_value); |
36f2332b JG |
610 | end: |
611 | xmlFree(encoded_element_name); | |
612 | xmlFree(encoded_value); | |
28676a1d | 613 | return ret >= 0 ? 0 : ret; |
36f2332b | 614 | } |
dcf266c0 JG |
615 | |
616 | static | |
617 | void xml_error_handler(void *ctx, const char *format, ...) | |
618 | { | |
619 | char *errMsg; | |
620 | va_list args; | |
621 | int ret; | |
622 | ||
623 | va_start(args, format); | |
624 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 625 | va_end(args); |
dcf266c0 JG |
626 | if (ret == -1) { |
627 | ERR("String allocation failed in xml error handler"); | |
628 | return; | |
629 | } | |
dcf266c0 JG |
630 | |
631 | fprintf(stderr, "XML Error: %s", errMsg); | |
632 | free(errMsg); | |
633 | } | |
634 | ||
635 | static | |
636 | void fini_session_config_validation_ctx( | |
637 | struct session_config_validation_ctx *ctx) | |
638 | { | |
639 | if (ctx->parser_ctx) { | |
640 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
641 | } | |
642 | ||
643 | if (ctx->schema) { | |
644 | xmlSchemaFree(ctx->schema); | |
645 | } | |
646 | ||
647 | if (ctx->schema_validation_ctx) { | |
648 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
649 | } | |
650 | ||
651 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
652 | } | |
653 | ||
54e399cb JG |
654 | static |
655 | char *get_session_config_xsd_path() | |
656 | { | |
657 | char *xsd_path; | |
e8fa9fb0 | 658 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
659 | size_t base_path_len; |
660 | size_t max_path_len; | |
661 | ||
662 | if (!base_path) { | |
663 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
664 | } | |
665 | ||
666 | base_path_len = strlen(base_path); | |
667 | max_path_len = base_path_len + | |
668 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
669 | xsd_path = zmalloc(max_path_len); | |
670 | if (!xsd_path) { | |
671 | goto end; | |
672 | } | |
673 | ||
674 | strncpy(xsd_path, base_path, max_path_len); | |
675 | if (xsd_path[base_path_len - 1] != '/') { | |
676 | xsd_path[base_path_len++] = '/'; | |
677 | } | |
678 | ||
679 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
680 | max_path_len - base_path_len); | |
681 | end: | |
682 | return xsd_path; | |
683 | } | |
684 | ||
dcf266c0 JG |
685 | static |
686 | int init_session_config_validation_ctx( | |
687 | struct session_config_validation_ctx *ctx) | |
688 | { | |
689 | int ret; | |
54e399cb JG |
690 | char *xsd_path = get_session_config_xsd_path(); |
691 | ||
692 | if (!xsd_path) { | |
693 | ret = -LTTNG_ERR_NOMEM; | |
694 | goto end; | |
695 | } | |
dcf266c0 | 696 | |
54e399cb | 697 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
698 | if (!ctx->parser_ctx) { |
699 | ERR("XSD parser context creation failed"); | |
700 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
701 | goto end; | |
702 | } | |
703 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
704 | xml_error_handler, NULL); | |
705 | ||
706 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
707 | if (!ctx->schema) { | |
708 | ERR("XSD parsing failed"); | |
709 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
710 | goto end; | |
711 | } | |
712 | ||
713 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
714 | if (!ctx->schema_validation_ctx) { | |
715 | ERR("XSD validation context creation failed"); | |
716 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
717 | goto end; | |
718 | } | |
719 | ||
720 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
721 | xml_error_handler, NULL); | |
722 | ret = 0; | |
723 | ||
724 | end: | |
725 | if (ret) { | |
726 | fini_session_config_validation_ctx(ctx); | |
727 | } | |
728 | ||
54e399cb | 729 | free(xsd_path); |
dcf266c0 JG |
730 | return ret; |
731 | } | |
732 | ||
733 | static | |
734 | int parse_uint(xmlChar *str, uint64_t *val) | |
735 | { | |
736 | int ret; | |
737 | char *endptr; | |
738 | ||
739 | if (!str || !val) { | |
740 | ret = -1; | |
741 | goto end; | |
742 | } | |
743 | ||
744 | *val = strtoull((const char *) str, &endptr, 10); | |
745 | if (!endptr || *endptr) { | |
746 | ret = -1; | |
747 | } else { | |
748 | ret = 0; | |
749 | } | |
750 | ||
751 | end: | |
752 | return ret; | |
753 | } | |
754 | ||
755 | static | |
756 | int parse_int(xmlChar *str, int64_t *val) | |
757 | { | |
758 | int ret; | |
759 | char *endptr; | |
760 | ||
761 | if (!str || !val) { | |
762 | ret = -1; | |
763 | goto end; | |
764 | } | |
765 | ||
766 | *val = strtoll((const char *) str, &endptr, 10); | |
767 | if (!endptr || *endptr) { | |
768 | ret = -1; | |
769 | } else { | |
770 | ret = 0; | |
771 | } | |
772 | ||
773 | end: | |
774 | return ret; | |
775 | } | |
776 | ||
777 | static | |
778 | int parse_bool(xmlChar *str, int *val) | |
779 | { | |
780 | int ret = 0; | |
781 | ||
782 | if (!str || !val) { | |
783 | ret = -1; | |
784 | goto end; | |
785 | } | |
786 | ||
787 | if (!strcmp((const char *) str, config_xml_true)) { | |
788 | *val = 1; | |
789 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
790 | *val = 0; | |
791 | } else { | |
792 | WARN("Invalid boolean value encoutered (%s).", | |
793 | (const char *) str); | |
794 | ret = -1; | |
795 | } | |
796 | end: | |
797 | return ret; | |
798 | } | |
799 | ||
800 | static | |
801 | int get_domain_type(xmlChar *domain) | |
802 | { | |
803 | int ret; | |
804 | ||
805 | if (!domain) { | |
806 | goto error; | |
807 | } | |
808 | ||
809 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
810 | ret = LTTNG_DOMAIN_KERNEL; | |
811 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
812 | ret = LTTNG_DOMAIN_UST; | |
813 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
814 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
815 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
816 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
817 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
818 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
819 | } else { |
820 | goto error; | |
821 | } | |
822 | ||
823 | return ret; | |
824 | error: | |
825 | return -1; | |
826 | } | |
827 | ||
828 | static | |
829 | int get_buffer_type(xmlChar *buffer_type) | |
830 | { | |
831 | int ret; | |
832 | ||
833 | if (!buffer_type) { | |
834 | goto error; | |
835 | } | |
836 | ||
837 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
838 | ret = LTTNG_BUFFER_GLOBAL; | |
839 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
840 | ret = LTTNG_BUFFER_PER_UID; | |
841 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
842 | ret = LTTNG_BUFFER_PER_PID; | |
843 | } else { | |
844 | goto error; | |
845 | } | |
846 | ||
847 | return ret; | |
848 | error: | |
849 | return -1; | |
850 | } | |
851 | ||
852 | static | |
853 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
854 | { | |
855 | int ret; | |
856 | ||
857 | if (!overwrite_mode) { | |
858 | goto error; | |
859 | } | |
860 | ||
861 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
862 | ret = 1; | |
863 | } else if (!strcmp((char *) overwrite_mode, | |
864 | config_overwrite_mode_discard)) { | |
865 | ret = 0; | |
866 | } else { | |
867 | goto error; | |
868 | } | |
869 | ||
870 | return ret; | |
871 | error: | |
872 | return -1; | |
873 | } | |
874 | ||
875 | static | |
876 | int get_output_type(xmlChar *output_type) | |
877 | { | |
878 | int ret; | |
879 | ||
880 | if (!output_type) { | |
881 | goto error; | |
882 | } | |
883 | ||
884 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
885 | ret = LTTNG_EVENT_MMAP; | |
886 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
887 | ret = LTTNG_EVENT_SPLICE; | |
888 | } else { | |
889 | goto error; | |
890 | } | |
891 | ||
892 | return ret; | |
893 | error: | |
894 | return -1; | |
895 | } | |
896 | ||
897 | static | |
898 | int get_event_type(xmlChar *event_type) | |
899 | { | |
900 | int ret; | |
901 | ||
902 | if (!event_type) { | |
903 | goto error; | |
904 | } | |
905 | ||
906 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
907 | ret = LTTNG_EVENT_ALL; | |
908 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
909 | ret = LTTNG_EVENT_TRACEPOINT; | |
910 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
911 | ret = LTTNG_EVENT_PROBE; | |
912 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
913 | ret = LTTNG_EVENT_FUNCTION; | |
914 | } else if (!strcmp((char *) event_type, | |
915 | config_event_type_function_entry)) { | |
916 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
917 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
918 | ret = LTTNG_EVENT_NOOP; | |
919 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
920 | ret = LTTNG_EVENT_SYSCALL; | |
921 | } else { | |
922 | goto error; | |
923 | } | |
924 | ||
925 | return ret; | |
926 | error: | |
927 | return -1; | |
928 | } | |
929 | ||
930 | static | |
931 | int get_loglevel_type(xmlChar *loglevel_type) | |
932 | { | |
933 | int ret; | |
934 | ||
935 | if (!loglevel_type) { | |
936 | goto error; | |
937 | } | |
938 | ||
939 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
940 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
941 | } else if (!strcmp((char *) loglevel_type, | |
942 | config_loglevel_type_range)) { | |
943 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
944 | } else if (!strcmp((char *) loglevel_type, | |
945 | config_loglevel_type_single)) { | |
946 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
947 | } else { | |
948 | goto error; | |
949 | } | |
950 | ||
951 | return ret; | |
952 | error: | |
953 | return -1; | |
954 | } | |
955 | ||
956 | /* | |
957 | * Return the context type or -1 on error. | |
958 | */ | |
959 | static | |
960 | int get_context_type(xmlChar *context_type) | |
961 | { | |
962 | int ret; | |
963 | ||
964 | if (!context_type) { | |
965 | goto error; | |
966 | } | |
967 | ||
968 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
969 | ret = LTTNG_EVENT_CONTEXT_PID; | |
970 | } else if (!strcmp((char *) context_type, | |
971 | config_event_context_procname)) { | |
972 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
973 | } else if (!strcmp((char *) context_type, | |
974 | config_event_context_prio)) { | |
975 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
976 | } else if (!strcmp((char *) context_type, | |
977 | config_event_context_nice)) { | |
978 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
979 | } else if (!strcmp((char *) context_type, | |
980 | config_event_context_vpid)) { | |
981 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
982 | } else if (!strcmp((char *) context_type, | |
983 | config_event_context_tid)) { | |
984 | ret = LTTNG_EVENT_CONTEXT_TID; | |
985 | } else if (!strcmp((char *) context_type, | |
986 | config_event_context_vtid)) { | |
987 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
988 | } else if (!strcmp((char *) context_type, | |
989 | config_event_context_ppid)) { | |
990 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
991 | } else if (!strcmp((char *) context_type, | |
992 | config_event_context_vppid)) { | |
993 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
994 | } else if (!strcmp((char *) context_type, | |
995 | config_event_context_pthread_id)) { | |
996 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
997 | } else if (!strcmp((char *) context_type, | |
998 | config_event_context_hostname)) { | |
999 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
1000 | } else if (!strcmp((char *) context_type, | |
1001 | config_event_context_ip)) { | |
1002 | ret = LTTNG_EVENT_CONTEXT_IP; | |
1ae5e83e JD |
1003 | } else if (!strcmp((char *) context_type, |
1004 | config_event_context_interruptible)) { | |
1005 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; | |
1006 | } else if (!strcmp((char *) context_type, | |
1007 | config_event_context_preemptible)) { | |
1008 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; | |
1009 | } else if (!strcmp((char *) context_type, | |
1010 | config_event_context_need_reschedule)) { | |
1011 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; | |
1012 | } else if (!strcmp((char *) context_type, | |
1013 | config_event_context_migratable)) { | |
1014 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; | |
dcf266c0 JG |
1015 | } else { |
1016 | goto error; | |
1017 | } | |
1018 | ||
1019 | return ret; | |
1020 | error: | |
1021 | return -1; | |
1022 | } | |
1023 | ||
1024 | static | |
1025 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
1026 | { | |
1027 | int ret; | |
1028 | xmlNodePtr node; | |
1029 | ||
1030 | for (node = xmlFirstElementChild(domain_node); node; | |
1031 | node = xmlNextElementSibling(node)) { | |
1032 | if (!strcmp((const char *) node->name, config_element_type)) { | |
1033 | /* domain type */ | |
1034 | xmlChar *node_content = xmlNodeGetContent(node); | |
1035 | if (!node_content) { | |
1036 | ret = -LTTNG_ERR_NOMEM; | |
1037 | goto end; | |
1038 | } | |
1039 | ||
1040 | ret = get_domain_type(node_content); | |
1041 | free(node_content); | |
1042 | if (ret < 0) { | |
1043 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1044 | goto end; | |
1045 | } | |
1046 | ||
1047 | domain->type = ret; | |
1048 | } else if (!strcmp((const char *) node->name, | |
1049 | config_element_buffer_type)) { | |
1050 | /* buffer type */ | |
1051 | xmlChar *node_content = xmlNodeGetContent(node); | |
1052 | if (!node_content) { | |
1053 | ret = -LTTNG_ERR_NOMEM; | |
1054 | goto end; | |
1055 | } | |
1056 | ||
1057 | ret = get_buffer_type(node_content); | |
1058 | free(node_content); | |
1059 | if (ret < 0) { | |
1060 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1061 | goto end; | |
1062 | } | |
1063 | ||
1064 | domain->buf_type = ret; | |
1065 | } | |
1066 | } | |
1067 | ret = 0; | |
1068 | end: | |
1069 | return ret; | |
1070 | } | |
1071 | ||
1072 | static | |
1073 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1074 | char **data_uri) | |
1075 | { | |
1076 | xmlNodePtr node; | |
1077 | ||
1078 | for (node = xmlFirstElementChild(net_output_node); node; | |
1079 | node = xmlNextElementSibling(node)) { | |
1080 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1081 | /* control_uri */ | |
1082 | *control_uri = (char *) xmlNodeGetContent(node); | |
1083 | if (!*control_uri) { | |
1084 | break; | |
1085 | } | |
1086 | } else { | |
1087 | /* data_uri */ | |
1088 | *data_uri = (char *) xmlNodeGetContent(node); | |
1089 | if (!*data_uri) { | |
1090 | break; | |
1091 | } | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1096 | } | |
1097 | ||
1098 | static | |
1099 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1100 | struct consumer_output *output) | |
1101 | { | |
1102 | int ret; | |
1103 | xmlNodePtr node; | |
1104 | ||
1105 | assert(output); | |
1106 | ||
1107 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1108 | node = xmlNextElementSibling(node)) { | |
1109 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1110 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1111 | ||
1112 | /* enabled */ | |
1113 | if (!enabled_str) { | |
1114 | ret = -LTTNG_ERR_NOMEM; | |
1115 | goto end; | |
1116 | } | |
1117 | ||
1118 | ret = parse_bool(enabled_str, &output->enabled); | |
1119 | free(enabled_str); | |
1120 | if (ret) { | |
1121 | goto end; | |
1122 | } | |
1123 | } else { | |
1124 | xmlNodePtr output_type_node; | |
1125 | ||
1126 | /* destination */ | |
1127 | output_type_node = xmlFirstElementChild(node); | |
1128 | if (!output_type_node) { | |
1129 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1130 | goto end; | |
1131 | } | |
1132 | ||
1133 | if (!strcmp((const char *) output_type_node->name, | |
1134 | config_element_path)) { | |
1135 | /* path */ | |
1136 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1137 | if (!output->path) { | |
1138 | ret = -LTTNG_ERR_NOMEM; | |
1139 | goto end; | |
1140 | } | |
1141 | } else { | |
1142 | /* net_output */ | |
1143 | ret = get_net_output_uris(output_type_node, | |
1144 | &output->control_uri, &output->data_uri); | |
1145 | if (ret) { | |
1146 | goto end; | |
1147 | } | |
1148 | } | |
1149 | } | |
1150 | } | |
1151 | ret = 0; | |
1152 | ||
1153 | end: | |
1154 | if (ret) { | |
1155 | free(output->path); | |
1156 | free(output->control_uri); | |
1157 | free(output->data_uri); | |
1158 | memset(output, 0, sizeof(struct consumer_output)); | |
1159 | } | |
1160 | return ret; | |
1161 | } | |
1162 | ||
1163 | static | |
95681498 JG |
1164 | int create_session_net_output(const char *name, const char *control_uri, |
1165 | const char *data_uri) | |
dcf266c0 JG |
1166 | { |
1167 | int ret; | |
1168 | struct lttng_handle *handle; | |
1169 | const char *uri = NULL; | |
1170 | ||
1171 | assert(name); | |
dcf266c0 | 1172 | |
95681498 | 1173 | handle = lttng_create_handle(name, NULL); |
dcf266c0 JG |
1174 | if (!handle) { |
1175 | ret = -LTTNG_ERR_NOMEM; | |
1176 | goto end; | |
1177 | } | |
1178 | ||
1179 | if (!control_uri || !data_uri) { | |
1180 | uri = control_uri ? control_uri : data_uri; | |
1181 | control_uri = uri; | |
1182 | data_uri = uri; | |
1183 | } | |
1184 | ||
1185 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1186 | lttng_destroy_handle(handle); | |
1187 | end: | |
1188 | return ret; | |
1189 | } | |
1190 | ||
1191 | static | |
1b08cbce JR |
1192 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node, |
1193 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1194 | { |
1195 | int ret; | |
1196 | xmlNodePtr node = NULL; | |
1197 | xmlNodePtr snapshot_output_list_node; | |
1198 | xmlNodePtr snapshot_output_node; | |
1199 | ||
1200 | assert(session_name); | |
1201 | ||
1202 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1203 | if (ret) { | |
1204 | goto end; | |
1205 | } | |
1206 | ||
1207 | if (!output_node) { | |
1208 | goto end; | |
1209 | } | |
1210 | ||
1211 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1212 | ||
1213 | /* Parse and create snapshot outputs */ | |
1214 | ||
1215 | for (snapshot_output_node = | |
1216 | xmlFirstElementChild(snapshot_output_list_node); | |
1217 | snapshot_output_node; snapshot_output_node = | |
1218 | xmlNextElementSibling(snapshot_output_node)) { | |
1219 | char *name = NULL; | |
1220 | uint64_t max_size = UINT64_MAX; | |
1221 | struct consumer_output output = { 0 }; | |
1222 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1b08cbce JR |
1223 | const char *control_uri = NULL; |
1224 | const char *data_uri = NULL; | |
1225 | const char *path = NULL; | |
dcf266c0 JG |
1226 | |
1227 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1228 | node = xmlNextElementSibling(node)) { | |
1229 | if (!strcmp((const char *) node->name, | |
1230 | config_element_name)) { | |
1231 | /* name */ | |
1232 | name = (char *) xmlNodeGetContent(node); | |
1233 | if (!name) { | |
1234 | ret = -LTTNG_ERR_NOMEM; | |
1235 | goto error_snapshot_output; | |
1236 | } | |
1237 | } else if (!strcmp((const char *) node->name, | |
1238 | config_element_max_size)) { | |
1239 | xmlChar *content = xmlNodeGetContent(node); | |
1240 | ||
1241 | /* max_size */ | |
1242 | if (!content) { | |
1243 | ret = -LTTNG_ERR_NOMEM; | |
1244 | goto error_snapshot_output; | |
1245 | } | |
1246 | ret = parse_uint(content, &max_size); | |
1247 | free(content); | |
1248 | if (ret) { | |
1249 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1250 | goto error_snapshot_output; | |
1251 | } | |
1252 | } else { | |
1253 | /* consumer_output */ | |
1254 | ret = process_consumer_output(node, &output); | |
1255 | if (ret) { | |
1256 | goto error_snapshot_output; | |
1257 | } | |
1258 | } | |
1259 | } | |
1260 | ||
21a3f144 JR |
1261 | control_uri = output.control_uri; |
1262 | data_uri = output.data_uri; | |
1263 | path = output.path; | |
1264 | ||
1b08cbce JR |
1265 | if (overrides) { |
1266 | if (overrides->path_url) { | |
1b08cbce | 1267 | path = overrides->path_url; |
21a3f144 JR |
1268 | /* Control/data_uri are null */ |
1269 | control_uri = NULL; | |
1270 | data_uri = NULL; | |
1b08cbce JR |
1271 | } else { |
1272 | if (overrides->ctrl_url) { | |
1b08cbce | 1273 | control_uri = overrides->ctrl_url; |
21a3f144 JR |
1274 | /* path is null */ |
1275 | path = NULL; | |
1b08cbce JR |
1276 | } |
1277 | if (overrides->data_url) { | |
1b08cbce | 1278 | data_uri = overrides->data_url; |
21a3f144 JR |
1279 | /* path is null */ |
1280 | path = NULL; | |
1b08cbce JR |
1281 | } |
1282 | } | |
1b08cbce JR |
1283 | } |
1284 | ||
dcf266c0 JG |
1285 | snapshot_output = lttng_snapshot_output_create(); |
1286 | if (!snapshot_output) { | |
1287 | ret = -LTTNG_ERR_NOMEM; | |
1288 | goto error_snapshot_output; | |
1289 | } | |
1290 | ||
1291 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1292 | if (ret) { | |
1293 | goto error_snapshot_output; | |
1294 | } | |
1295 | ||
1296 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1297 | if (ret) { | |
1298 | goto error_snapshot_output; | |
1299 | } | |
1300 | ||
1b08cbce JR |
1301 | if (path) { |
1302 | ret = lttng_snapshot_output_set_ctrl_url(path, | |
dcf266c0 JG |
1303 | snapshot_output); |
1304 | if (ret) { | |
1305 | goto error_snapshot_output; | |
1306 | } | |
1307 | } else { | |
1b08cbce JR |
1308 | if (control_uri) { |
1309 | ret = lttng_snapshot_output_set_ctrl_url(control_uri, | |
dcf266c0 JG |
1310 | snapshot_output); |
1311 | if (ret) { | |
1312 | goto error_snapshot_output; | |
1313 | } | |
1314 | } | |
1315 | ||
1b08cbce JR |
1316 | if (data_uri) { |
1317 | ret = lttng_snapshot_output_set_data_url(data_uri, | |
dcf266c0 JG |
1318 | snapshot_output); |
1319 | if (ret) { | |
1320 | goto error_snapshot_output; | |
1321 | } | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1326 | error_snapshot_output: | |
1327 | free(name); | |
1328 | free(output.path); | |
1329 | free(output.control_uri); | |
1330 | free(output.data_uri); | |
1331 | lttng_snapshot_output_destroy(snapshot_output); | |
1332 | if (ret) { | |
1333 | goto end; | |
1334 | } | |
1335 | } | |
1336 | end: | |
1337 | return ret; | |
1338 | } | |
1339 | ||
1340 | static | |
1341 | int create_session(const char *name, | |
1342 | struct lttng_domain *kernel_domain, | |
1343 | struct lttng_domain *ust_domain, | |
1344 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1345 | struct lttng_domain *log4j_domain, |
dcf266c0 | 1346 | xmlNodePtr output_node, |
1b08cbce JR |
1347 | uint64_t live_timer_interval, |
1348 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1349 | { |
1350 | int ret; | |
1351 | struct consumer_output output = { 0 }; | |
1352 | xmlNodePtr consumer_output_node; | |
1b08cbce JR |
1353 | const char *control_uri = NULL; |
1354 | const char *data_uri = NULL; | |
1355 | const char *path = NULL; | |
dcf266c0 JG |
1356 | |
1357 | assert(name); | |
dcf266c0 JG |
1358 | |
1359 | if (output_node) { | |
1360 | consumer_output_node = xmlFirstElementChild(output_node); | |
1361 | if (!consumer_output_node) { | |
1362 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1363 | goto end; | |
1364 | } | |
1365 | ||
1366 | if (strcmp((const char *) consumer_output_node->name, | |
1367 | config_element_consumer_output)) { | |
1368 | WARN("Invalid output type, expected %s node", | |
1369 | config_element_consumer_output); | |
1370 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1371 | goto end; | |
1372 | } | |
1373 | ||
1374 | ret = process_consumer_output(consumer_output_node, &output); | |
1375 | if (ret) { | |
1376 | goto end; | |
1377 | } | |
1378 | } | |
1379 | ||
21a3f144 JR |
1380 | control_uri = output.control_uri; |
1381 | data_uri = output.data_uri; | |
1382 | path = output.path; | |
1383 | ||
1b08cbce JR |
1384 | /* Check for override and apply them */ |
1385 | if (overrides) { | |
1386 | if (overrides->path_url) { | |
1b08cbce | 1387 | path = overrides->path_url; |
21a3f144 JR |
1388 | /* control/data_uri are null */; |
1389 | control_uri = NULL; | |
1390 | data_uri = NULL; | |
1b08cbce JR |
1391 | } else { |
1392 | if (overrides->ctrl_url) { | |
1b08cbce | 1393 | control_uri = overrides->ctrl_url; |
21a3f144 JR |
1394 | /* path is null */ |
1395 | path = NULL; | |
1b08cbce JR |
1396 | } |
1397 | if (overrides->data_url) { | |
1b08cbce | 1398 | data_uri = overrides->data_url; |
21a3f144 JR |
1399 | /* path is null */ |
1400 | path = NULL; | |
1b08cbce JR |
1401 | } |
1402 | } | |
1b08cbce JR |
1403 | } |
1404 | ||
21a3f144 | 1405 | |
1b08cbce | 1406 | if (live_timer_interval != UINT64_MAX && !control_uri && !data_uri) { |
dcf266c0 JG |
1407 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
1408 | goto end; | |
1409 | } | |
1410 | ||
1b08cbce | 1411 | if (control_uri || data_uri) { |
dcf266c0 JG |
1412 | /* network destination */ |
1413 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1414 | /* |
1415 | * URLs are provided for sure since the test above make sure that | |
1416 | * with a live timer the data and control URIs are provided. So, | |
1417 | * NULL is passed here and will be set right after. | |
1418 | */ | |
1419 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1420 | } else { |
1421 | ret = lttng_create_session(name, NULL); | |
1422 | } | |
1423 | if (ret) { | |
1424 | goto end; | |
1425 | } | |
1426 | ||
1b08cbce | 1427 | ret = create_session_net_output(name, control_uri, data_uri); |
95681498 JG |
1428 | if (ret) { |
1429 | goto end; | |
dcf266c0 | 1430 | } |
95681498 | 1431 | |
dcf266c0 JG |
1432 | } else { |
1433 | /* either local output or no output */ | |
1b08cbce | 1434 | ret = lttng_create_session(name, path); |
dcf266c0 JG |
1435 | if (ret) { |
1436 | goto end; | |
1437 | } | |
1438 | } | |
1439 | end: | |
1440 | free(output.path); | |
1441 | free(output.control_uri); | |
1442 | free(output.data_uri); | |
1443 | return ret; | |
1444 | } | |
1445 | static | |
1446 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1447 | struct lttng_event_probe_attr *attr) | |
1448 | { | |
1449 | int ret; | |
1450 | ||
1451 | assert(probe_attribute_node); | |
1452 | assert(attr); | |
1453 | ||
1454 | if (!strcmp((const char *) probe_attribute_node->name, | |
1455 | config_element_address)) { | |
1456 | xmlChar *content; | |
1457 | uint64_t addr = 0; | |
1458 | ||
1459 | /* addr */ | |
1460 | content = xmlNodeGetContent(probe_attribute_node); | |
1461 | if (!content) { | |
1462 | ret = -LTTNG_ERR_NOMEM; | |
1463 | goto end; | |
1464 | } | |
1465 | ||
1466 | ret = parse_uint(content, &addr); | |
1467 | free(content); | |
1468 | if (ret) { | |
1469 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1470 | goto end; | |
1471 | } | |
1472 | ||
1473 | attr->addr = addr; | |
1474 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1475 | config_element_offset)) { | |
1476 | xmlChar *content; | |
1477 | uint64_t offset = 0; | |
1478 | ||
1479 | /* offset */ | |
1480 | content = xmlNodeGetContent(probe_attribute_node); | |
1481 | if (!content) { | |
1482 | ret = -LTTNG_ERR_NOMEM; | |
1483 | goto end; | |
1484 | } | |
1485 | ||
1486 | ret = parse_uint(content, &offset); | |
1487 | free(content); | |
1488 | if (ret) { | |
1489 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1490 | goto end; | |
1491 | } | |
1492 | ||
1493 | attr->offset = offset; | |
1494 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1495 | config_element_symbol_name)) { | |
1496 | xmlChar *content; | |
1497 | size_t name_len; | |
1498 | ||
1499 | /* symbol_name */ | |
1500 | content = xmlNodeGetContent(probe_attribute_node); | |
1501 | if (!content) { | |
1502 | ret = -LTTNG_ERR_NOMEM; | |
1503 | goto end; | |
1504 | } | |
1505 | ||
1506 | name_len = strlen((char *) content); | |
1507 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1508 | WARN("symbol_name too long."); | |
1509 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1510 | free(content); | |
1511 | goto end; | |
1512 | } | |
1513 | ||
1514 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1515 | free(content); | |
1516 | } | |
1517 | ret = 0; | |
1518 | end: | |
1519 | return ret; | |
1520 | } | |
1521 | ||
1522 | static | |
1523 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
d7b645e2 | 1524 | const char *channel_name, const enum process_event_node_phase phase) |
dcf266c0 | 1525 | { |
d7b645e2 | 1526 | int ret = 0, i; |
dcf266c0 JG |
1527 | xmlNodePtr node; |
1528 | struct lttng_event event; | |
1529 | char **exclusions = NULL; | |
1530 | unsigned long exclusion_count = 0; | |
1531 | char *filter_expression = NULL; | |
1532 | ||
1533 | assert(event_node); | |
1534 | assert(handle); | |
1535 | assert(channel_name); | |
1536 | ||
1537 | memset(&event, 0, sizeof(event)); | |
1538 | ||
f40eba3d JG |
1539 | /* Initialize default log level which varies by domain */ |
1540 | switch (handle->domain.type) | |
1541 | { | |
1542 | case LTTNG_DOMAIN_JUL: | |
1543 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; | |
1544 | break; | |
1545 | case LTTNG_DOMAIN_LOG4J: | |
1546 | event.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; | |
1547 | break; | |
1548 | case LTTNG_DOMAIN_PYTHON: | |
1549 | event.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; | |
1550 | break; | |
1551 | case LTTNG_DOMAIN_UST: | |
1552 | case LTTNG_DOMAIN_KERNEL: | |
1553 | event.loglevel = LTTNG_LOGLEVEL_DEBUG; | |
1554 | break; | |
1555 | default: | |
1556 | assert(0); | |
1557 | } | |
1558 | ||
dcf266c0 JG |
1559 | for (node = xmlFirstElementChild(event_node); node; |
1560 | node = xmlNextElementSibling(node)) { | |
1561 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1562 | xmlChar *content; | |
1563 | size_t name_len; | |
1564 | ||
1565 | /* name */ | |
1566 | content = xmlNodeGetContent(node); | |
1567 | if (!content) { | |
1568 | ret = -LTTNG_ERR_NOMEM; | |
1569 | goto end; | |
1570 | } | |
1571 | ||
1572 | name_len = strlen((char *) content); | |
1573 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1574 | WARN("Channel name too long."); | |
1575 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1576 | free(content); | |
1577 | goto end; | |
1578 | } | |
1579 | ||
1580 | strncpy(event.name, (const char *) content, name_len); | |
1581 | free(content); | |
1582 | } else if (!strcmp((const char *) node->name, | |
1583 | config_element_enabled)) { | |
1584 | xmlChar *content = xmlNodeGetContent(node); | |
1585 | ||
1586 | /* enabled */ | |
1587 | if (!content) { | |
1588 | ret = -LTTNG_ERR_NOMEM; | |
1589 | goto end; | |
1590 | } | |
1591 | ||
1592 | ret = parse_bool(content, &event.enabled); | |
1593 | free(content); | |
1594 | if (ret) { | |
1595 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1596 | goto end; | |
1597 | } | |
1598 | } else if (!strcmp((const char *) node->name, | |
1599 | config_element_type)) { | |
1600 | xmlChar *content = xmlNodeGetContent(node); | |
1601 | ||
1602 | /* type */ | |
1603 | if (!content) { | |
1604 | ret = -LTTNG_ERR_NOMEM; | |
1605 | goto end; | |
1606 | } | |
1607 | ||
1608 | ret = get_event_type(content); | |
1609 | free(content); | |
1610 | if (ret < 0) { | |
1611 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1612 | goto end; | |
1613 | } | |
1614 | ||
1615 | event.type = ret; | |
1616 | } else if (!strcmp((const char *) node->name, | |
1617 | config_element_loglevel_type)) { | |
1618 | xmlChar *content = xmlNodeGetContent(node); | |
1619 | ||
1620 | /* loglevel_type */ | |
1621 | if (!content) { | |
1622 | ret = -LTTNG_ERR_NOMEM; | |
1623 | goto end; | |
1624 | } | |
1625 | ||
1626 | ret = get_loglevel_type(content); | |
1627 | free(content); | |
1628 | if (ret < 0) { | |
1629 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1630 | goto end; | |
1631 | } | |
1632 | ||
1633 | event.loglevel_type = ret; | |
1634 | } else if (!strcmp((const char *) node->name, | |
1635 | config_element_loglevel)) { | |
1636 | xmlChar *content; | |
1637 | int64_t loglevel = 0; | |
1638 | ||
1639 | /* loglevel */ | |
1640 | content = xmlNodeGetContent(node); | |
1641 | if (!content) { | |
1642 | ret = -LTTNG_ERR_NOMEM; | |
1643 | goto end; | |
1644 | } | |
1645 | ||
1646 | ret = parse_int(content, &loglevel); | |
1647 | free(content); | |
1648 | if (ret) { | |
1649 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1650 | goto end; | |
1651 | } | |
1652 | ||
1653 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1654 | WARN("loglevel out of range."); | |
1655 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1656 | goto end; | |
1657 | } | |
1658 | ||
1659 | event.loglevel = loglevel; | |
1660 | } else if (!strcmp((const char *) node->name, | |
1661 | config_element_filter)) { | |
1662 | xmlChar *content = | |
1663 | xmlNodeGetContent(node); | |
1664 | ||
1665 | /* filter */ | |
1666 | if (!content) { | |
1667 | ret = -LTTNG_ERR_NOMEM; | |
1668 | goto end; | |
1669 | } | |
1670 | ||
02d8ac3d | 1671 | free(filter_expression); |
dcf266c0 JG |
1672 | filter_expression = strdup((char *) content); |
1673 | free(content); | |
1674 | if (!filter_expression) { | |
1675 | ret = -LTTNG_ERR_NOMEM; | |
1676 | goto end; | |
1677 | } | |
1678 | } else if (!strcmp((const char *) node->name, | |
1679 | config_element_exclusions)) { | |
1680 | xmlNodePtr exclusion_node; | |
1681 | int exclusion_index = 0; | |
1682 | ||
1683 | /* exclusions */ | |
1684 | if (exclusions) { | |
1685 | /* | |
1686 | * Exclusions has already been initialized, | |
1687 | * invalid file. | |
1688 | */ | |
1689 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1690 | goto end; | |
1691 | } | |
1692 | ||
1693 | exclusion_count = xmlChildElementCount(node); | |
1694 | if (!exclusion_count) { | |
1695 | continue; | |
1696 | } | |
1697 | ||
1698 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1699 | if (!exclusions) { | |
1700 | exclusion_count = 0; | |
1701 | ret = -LTTNG_ERR_NOMEM; | |
1702 | goto end; | |
1703 | } | |
1704 | ||
1705 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1706 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1707 | xmlChar *content = | |
1708 | xmlNodeGetContent(exclusion_node); | |
1709 | ||
1710 | if (!content) { | |
1711 | ret = -LTTNG_ERR_NOMEM; | |
1712 | goto end; | |
1713 | } | |
1714 | ||
1715 | exclusions[exclusion_index] = strdup((const char *) content); | |
1716 | free(content); | |
1717 | if (!exclusions[exclusion_index]) { | |
1718 | ret = -LTTNG_ERR_NOMEM; | |
1719 | goto end; | |
1720 | } | |
1721 | exclusion_index++; | |
1722 | } | |
1723 | ||
1724 | event.exclusion = 1; | |
1725 | } else if (!strcmp((const char *) node->name, | |
1726 | config_element_attributes)) { | |
1727 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1728 | ||
1729 | /* attributes */ | |
1730 | if (!attribute_node) { | |
1731 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1732 | goto end; | |
1733 | } | |
1734 | ||
1735 | if (!strcmp((const char *) node->name, | |
1736 | config_element_probe_attributes)) { | |
1737 | xmlNodePtr probe_attribute_node; | |
1738 | ||
1739 | /* probe_attributes */ | |
1740 | for (probe_attribute_node = | |
1741 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1742 | probe_attribute_node = xmlNextElementSibling( | |
1743 | probe_attribute_node)) { | |
1744 | ||
1745 | ret = process_probe_attribute_node(probe_attribute_node, | |
1746 | &event.attr.probe); | |
1747 | if (ret) { | |
1748 | goto end; | |
1749 | } | |
1750 | } | |
1751 | } else { | |
1752 | size_t sym_len; | |
1753 | xmlChar *content; | |
1754 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1755 | ||
1756 | /* function_attributes */ | |
1757 | content = xmlNodeGetContent(symbol_node); | |
1758 | if (!content) { | |
1759 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1760 | goto end; | |
1761 | } | |
1762 | ||
1763 | sym_len = strlen((char *) content); | |
1764 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1765 | WARN("Function name too long."); | |
1766 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1767 | free(content); | |
1768 | goto end; | |
1769 | } | |
1770 | ||
1771 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1772 | sym_len); | |
1773 | free(content); | |
1774 | } | |
1775 | } | |
1776 | } | |
1777 | ||
d7b645e2 JR |
1778 | if ((event.enabled && phase == ENABLE) || phase == CREATION) { |
1779 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1780 | filter_expression, exclusion_count, exclusions); | |
1781 | if (ret < 0) { | |
1782 | WARN("Enabling event (name:%s) on load failed.", event.name); | |
1783 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1784 | goto end; | |
1785 | } | |
065321e9 | 1786 | } |
dcf266c0 JG |
1787 | end: |
1788 | for (i = 0; i < exclusion_count; i++) { | |
1789 | free(exclusions[i]); | |
1790 | } | |
1791 | ||
1792 | free(exclusions); | |
1793 | free(filter_expression); | |
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | static | |
1798 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1799 | const char *channel_name) | |
1800 | { | |
1801 | int ret = 0; | |
d7b645e2 | 1802 | struct lttng_event event; |
dcf266c0 JG |
1803 | xmlNodePtr node; |
1804 | ||
1805 | assert(events_node); | |
1806 | assert(handle); | |
1807 | assert(channel_name); | |
1808 | ||
1809 | for (node = xmlFirstElementChild(events_node); node; | |
1810 | node = xmlNextElementSibling(node)) { | |
d7b645e2 | 1811 | ret = process_event_node(node, handle, channel_name, CREATION); |
dcf266c0 JG |
1812 | if (ret) { |
1813 | goto end; | |
1814 | } | |
1815 | } | |
d7b645e2 JR |
1816 | |
1817 | /* | |
1818 | * Disable all events to enable only the necessary events. | |
1819 | * Limitations regarding lttng_disable_events and tuple descriptor | |
1820 | * force this approach. | |
1821 | */ | |
1822 | memset(&event, 0, sizeof(event)); | |
1823 | event.loglevel = -1; | |
1824 | event.type = LTTNG_EVENT_ALL; | |
1825 | ret = lttng_disable_event_ext(handle, &event, channel_name, NULL); | |
1826 | if (ret) { | |
1827 | goto end; | |
1828 | } | |
1829 | ||
1830 | for (node = xmlFirstElementChild(events_node); node; | |
1831 | node = xmlNextElementSibling(node)) { | |
1832 | ret = process_event_node(node, handle, channel_name, ENABLE); | |
1833 | if (ret) { | |
1834 | goto end; | |
1835 | } | |
1836 | } | |
1837 | ||
dcf266c0 JG |
1838 | end: |
1839 | return ret; | |
1840 | } | |
1841 | ||
1842 | static | |
1843 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1844 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1845 | xmlNodePtr *events_node) | |
1846 | { | |
1847 | int ret; | |
1848 | ||
1849 | assert(attr_node); | |
1850 | assert(channel); | |
1851 | assert(contexts_node); | |
1852 | assert(events_node); | |
1853 | ||
1854 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1855 | xmlChar *content; | |
1856 | size_t name_len; | |
1857 | ||
1858 | /* name */ | |
1859 | content = xmlNodeGetContent(attr_node); | |
1860 | if (!content) { | |
1861 | ret = -LTTNG_ERR_NOMEM; | |
1862 | goto end; | |
1863 | } | |
1864 | ||
1865 | name_len = strlen((char *) content); | |
1866 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1867 | WARN("Channel name too long."); | |
1868 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1869 | free(content); | |
1870 | goto end; | |
1871 | } | |
1872 | ||
1873 | strncpy(channel->name, (const char *) content, name_len); | |
1874 | free(content); | |
1875 | } else if (!strcmp((const char *) attr_node->name, | |
1876 | config_element_enabled)) { | |
1877 | xmlChar *content; | |
1878 | int enabled; | |
1879 | ||
1880 | /* enabled */ | |
1881 | content = xmlNodeGetContent(attr_node); | |
1882 | if (!content) { | |
1883 | ret = -LTTNG_ERR_NOMEM; | |
1884 | goto end; | |
1885 | } | |
1886 | ||
1887 | ret = parse_bool(content, &enabled); | |
1888 | free(content); | |
1889 | if (ret) { | |
1890 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1891 | goto end; | |
1892 | } | |
1893 | ||
1894 | channel->enabled = enabled; | |
1895 | } else if (!strcmp((const char *) attr_node->name, | |
1896 | config_element_overwrite_mode)) { | |
1897 | xmlChar *content; | |
1898 | ||
1899 | /* overwrite_mode */ | |
1900 | content = xmlNodeGetContent(attr_node); | |
1901 | if (!content) { | |
1902 | ret = -LTTNG_ERR_NOMEM; | |
1903 | goto end; | |
1904 | } | |
1905 | ||
1906 | ret = get_overwrite_mode(content); | |
1907 | free(content); | |
1908 | if (ret < 0) { | |
1909 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1910 | goto end; | |
1911 | } | |
1912 | ||
1913 | channel->attr.overwrite = ret; | |
1914 | } else if (!strcmp((const char *) attr_node->name, | |
1915 | config_element_subbuf_size)) { | |
1916 | xmlChar *content; | |
1917 | ||
1918 | /* subbuffer_size */ | |
1919 | content = xmlNodeGetContent(attr_node); | |
1920 | if (!content) { | |
1921 | ret = -LTTNG_ERR_NOMEM; | |
1922 | goto end; | |
1923 | } | |
1924 | ||
1925 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1926 | free(content); | |
1927 | if (ret) { | |
1928 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1929 | goto end; | |
1930 | } | |
1931 | } else if (!strcmp((const char *) attr_node->name, | |
1932 | config_element_num_subbuf)) { | |
1933 | xmlChar *content; | |
1934 | ||
1935 | /* subbuffer_count */ | |
1936 | content = xmlNodeGetContent(attr_node); | |
1937 | if (!content) { | |
1938 | ret = -LTTNG_ERR_NOMEM; | |
1939 | goto end; | |
1940 | } | |
1941 | ||
1942 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1943 | free(content); | |
1944 | if (ret) { | |
1945 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1946 | goto end; | |
1947 | } | |
1948 | } else if (!strcmp((const char *) attr_node->name, | |
1949 | config_element_switch_timer_interval)) { | |
1950 | xmlChar *content; | |
1951 | uint64_t switch_timer_interval = 0; | |
1952 | ||
1953 | /* switch_timer_interval */ | |
1954 | content = xmlNodeGetContent(attr_node); | |
1955 | if (!content) { | |
1956 | ret = -LTTNG_ERR_NOMEM; | |
1957 | goto end; | |
1958 | } | |
1959 | ||
1960 | ret = parse_uint(content, &switch_timer_interval); | |
1961 | free(content); | |
1962 | if (ret) { | |
1963 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1964 | goto end; | |
1965 | } | |
1966 | ||
1967 | if (switch_timer_interval > UINT_MAX) { | |
1968 | WARN("switch_timer_interval out of range."); | |
1969 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1970 | goto end; | |
1971 | } | |
1972 | ||
1973 | channel->attr.switch_timer_interval = | |
1974 | switch_timer_interval; | |
1975 | } else if (!strcmp((const char *) attr_node->name, | |
1976 | config_element_read_timer_interval)) { | |
1977 | xmlChar *content; | |
1978 | uint64_t read_timer_interval = 0; | |
1979 | ||
1980 | /* read_timer_interval */ | |
1981 | content = xmlNodeGetContent(attr_node); | |
1982 | if (!content) { | |
1983 | ret = -LTTNG_ERR_NOMEM; | |
1984 | goto end; | |
1985 | } | |
1986 | ||
1987 | ret = parse_uint(content, &read_timer_interval); | |
1988 | free(content); | |
1989 | if (ret) { | |
1990 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1991 | goto end; | |
1992 | } | |
1993 | ||
1994 | if (read_timer_interval > UINT_MAX) { | |
1995 | WARN("read_timer_interval out of range."); | |
1996 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1997 | goto end; | |
1998 | } | |
1999 | ||
2000 | channel->attr.read_timer_interval = | |
2001 | read_timer_interval; | |
2002 | } else if (!strcmp((const char *) attr_node->name, | |
2003 | config_element_output_type)) { | |
2004 | xmlChar *content; | |
2005 | ||
2006 | /* output_type */ | |
2007 | content = xmlNodeGetContent(attr_node); | |
2008 | if (!content) { | |
2009 | ret = -LTTNG_ERR_NOMEM; | |
2010 | goto end; | |
2011 | } | |
2012 | ||
2013 | ret = get_output_type(content); | |
2014 | free(content); | |
2015 | if (ret < 0) { | |
2016 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2017 | goto end; | |
2018 | } | |
2019 | ||
2020 | channel->attr.output = ret; | |
2021 | } else if (!strcmp((const char *) attr_node->name, | |
2022 | config_element_tracefile_size)) { | |
2023 | xmlChar *content; | |
2024 | ||
2025 | /* tracefile_size */ | |
2026 | content = xmlNodeGetContent(attr_node); | |
2027 | if (!content) { | |
2028 | ret = -LTTNG_ERR_NOMEM; | |
2029 | goto end; | |
2030 | } | |
2031 | ||
2032 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
2033 | free(content); | |
2034 | if (ret) { | |
2035 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2036 | goto end; | |
2037 | } | |
2038 | } else if (!strcmp((const char *) attr_node->name, | |
2039 | config_element_tracefile_count)) { | |
2040 | xmlChar *content; | |
2041 | ||
2042 | /* tracefile_count */ | |
2043 | content = xmlNodeGetContent(attr_node); | |
2044 | if (!content) { | |
2045 | ret = -LTTNG_ERR_NOMEM; | |
2046 | goto end; | |
2047 | } | |
2048 | ||
2049 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
2050 | free(content); | |
2051 | if (ret) { | |
2052 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2053 | goto end; | |
2054 | } | |
2055 | } else if (!strcmp((const char *) attr_node->name, | |
2056 | config_element_live_timer_interval)) { | |
2057 | xmlChar *content; | |
2058 | uint64_t live_timer_interval = 0; | |
2059 | ||
2060 | /* live_timer_interval */ | |
2061 | content = xmlNodeGetContent(attr_node); | |
2062 | if (!content) { | |
2063 | ret = -LTTNG_ERR_NOMEM; | |
2064 | goto end; | |
2065 | } | |
2066 | ||
2067 | ret = parse_uint(content, &live_timer_interval); | |
2068 | free(content); | |
2069 | if (ret) { | |
2070 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2071 | goto end; | |
2072 | } | |
2073 | ||
2074 | if (live_timer_interval > UINT_MAX) { | |
2075 | WARN("live_timer_interval out of range."); | |
2076 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2077 | goto end; | |
2078 | } | |
2079 | ||
2080 | channel->attr.live_timer_interval = | |
2081 | live_timer_interval; | |
2082 | } else if (!strcmp((const char *) attr_node->name, | |
2083 | config_element_events)) { | |
2084 | /* events */ | |
2085 | *events_node = attr_node; | |
2086 | } else { | |
2087 | /* contexts */ | |
2088 | *contexts_node = attr_node; | |
2089 | } | |
2090 | ret = 0; | |
2091 | end: | |
2092 | return ret; | |
2093 | } | |
2094 | ||
2095 | static | |
2096 | int process_context_node(xmlNodePtr context_node, | |
2097 | struct lttng_handle *handle, const char *channel_name) | |
2098 | { | |
2099 | int ret; | |
2100 | struct lttng_event_context context; | |
2101 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
2102 | ||
2103 | assert(handle); | |
2104 | assert(channel_name); | |
2105 | ||
2106 | if (!context_child_node) { | |
2107 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2108 | goto end; | |
2109 | } | |
2110 | ||
2111 | memset(&context, 0, sizeof(context)); | |
2112 | ||
2113 | if (!strcmp((const char *) context_child_node->name, | |
2114 | config_element_type)) { | |
2115 | /* type */ | |
2116 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
045fc617 | 2117 | |
dcf266c0 JG |
2118 | if (!content) { |
2119 | ret = -LTTNG_ERR_NOMEM; | |
2120 | goto end; | |
2121 | } | |
2122 | ||
2123 | ret = get_context_type(content); | |
2124 | free(content); | |
2125 | if (ret < 0) { | |
2126 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2127 | goto end; | |
2128 | } | |
2129 | ||
2130 | context.ctx = ret; | |
045fc617 JG |
2131 | } else if (!strcmp((const char *) context_child_node->name, |
2132 | config_element_context_perf)) { | |
2133 | /* perf */ | |
dcf266c0 JG |
2134 | xmlNodePtr perf_attr_node; |
2135 | ||
14ce5bd8 JG |
2136 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
2137 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
2138 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
2139 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
2140 | perf_attr_node; perf_attr_node = | |
2141 | xmlNextElementSibling(perf_attr_node)) { | |
2142 | if (!strcmp((const char *) perf_attr_node->name, | |
2143 | config_element_type)) { | |
2144 | xmlChar *content; | |
2145 | uint64_t type = 0; | |
2146 | ||
2147 | /* type */ | |
2148 | content = xmlNodeGetContent(perf_attr_node); | |
2149 | if (!content) { | |
2150 | ret = -LTTNG_ERR_NOMEM; | |
2151 | goto end; | |
2152 | } | |
2153 | ||
2154 | ret = parse_uint(content, &type); | |
2155 | free(content); | |
2156 | if (ret) { | |
2157 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2158 | goto end; | |
2159 | } | |
2160 | ||
2161 | if (type > UINT32_MAX) { | |
2162 | WARN("perf context type out of range."); | |
2163 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2164 | goto end; | |
2165 | } | |
2166 | ||
2167 | context.u.perf_counter.type = type; | |
2168 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2169 | config_element_config)) { | |
2170 | xmlChar *content; | |
2171 | uint64_t config = 0; | |
2172 | ||
2173 | /* config */ | |
2174 | content = xmlNodeGetContent(perf_attr_node); | |
2175 | if (!content) { | |
2176 | ret = -LTTNG_ERR_NOMEM; | |
2177 | goto end; | |
2178 | } | |
2179 | ||
2180 | ret = parse_uint(content, &config); | |
2181 | free(content); | |
2182 | if (ret) { | |
2183 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2184 | goto end; | |
2185 | } | |
2186 | ||
2187 | context.u.perf_counter.config = config; | |
2188 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2189 | config_element_name)) { | |
2190 | xmlChar *content; | |
2191 | size_t name_len; | |
2192 | ||
2193 | /* name */ | |
2194 | content = xmlNodeGetContent(perf_attr_node); | |
2195 | if (!content) { | |
2196 | ret = -LTTNG_ERR_NOMEM; | |
2197 | goto end; | |
2198 | } | |
2199 | ||
2200 | name_len = strlen((char *) content); | |
2201 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2202 | WARN("perf context name too long."); | |
2203 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2204 | free(content); | |
2205 | goto end; | |
2206 | } | |
2207 | ||
2208 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2209 | name_len); | |
2210 | free(content); | |
2211 | } | |
2212 | } | |
045fc617 JG |
2213 | } else if (!strcmp((const char *) context_child_node->name, |
2214 | config_element_context_app)) { | |
2215 | /* application context */ | |
2216 | xmlNodePtr app_ctx_node; | |
2217 | ||
2218 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
2219 | for (app_ctx_node = xmlFirstElementChild(context_child_node); | |
2220 | app_ctx_node; app_ctx_node = | |
2221 | xmlNextElementSibling(app_ctx_node)) { | |
2222 | xmlChar *content; | |
2223 | char **target = strcmp( | |
2224 | (const char *) app_ctx_node->name, | |
2225 | config_element_context_app_provider_name) == 0 ? | |
2226 | &context.u.app_ctx.provider_name : | |
2227 | &context.u.app_ctx.ctx_name; | |
2228 | ||
2229 | content = xmlNodeGetContent(app_ctx_node); | |
2230 | if (!content) { | |
2231 | ret = -LTTNG_ERR_NOMEM; | |
2232 | goto end; | |
2233 | } | |
2234 | ||
2235 | *target = (char *) content; | |
2236 | } | |
2237 | } else { | |
2238 | /* Unrecognized context type */ | |
2239 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2240 | goto end; | |
dcf266c0 JG |
2241 | } |
2242 | ||
2243 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
045fc617 JG |
2244 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2245 | free(context.u.app_ctx.provider_name); | |
2246 | free(context.u.app_ctx.ctx_name); | |
2247 | } | |
dcf266c0 JG |
2248 | end: |
2249 | return ret; | |
2250 | } | |
2251 | ||
2252 | static | |
2253 | int process_contexts_node(xmlNodePtr contexts_node, | |
2254 | struct lttng_handle *handle, const char *channel_name) | |
2255 | { | |
2256 | int ret = 0; | |
2257 | xmlNodePtr context_node; | |
2258 | ||
2259 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2260 | context_node = xmlNextElementSibling(context_node)) { | |
2261 | ret = process_context_node(context_node, handle, channel_name); | |
2262 | if (ret) { | |
2263 | goto end; | |
2264 | } | |
2265 | } | |
2266 | end: | |
2267 | return ret; | |
2268 | } | |
2269 | ||
847a5916 JR |
2270 | static |
2271 | int process_pid_tracker_node(xmlNodePtr pid_tracker_node, | |
2272 | struct lttng_handle *handle) | |
2273 | { | |
dd49e13f | 2274 | int ret = 0, child; |
847a5916 JR |
2275 | xmlNodePtr targets_node = NULL; |
2276 | xmlNodePtr node; | |
2277 | ||
2278 | assert(handle); | |
2279 | assert(pid_tracker_node); | |
2280 | /* get the targets node */ | |
2281 | for (node = xmlFirstElementChild(pid_tracker_node); node; | |
2282 | node = xmlNextElementSibling(node)) { | |
2283 | if (!strcmp((const char *) node->name, | |
2284 | config_element_targets)) { | |
2285 | targets_node = node; | |
2286 | break; | |
2287 | } | |
2288 | } | |
2289 | ||
2290 | if (!targets_node) { | |
2291 | ret = LTTNG_ERR_INVALID; | |
2292 | goto end; | |
2293 | } | |
2294 | ||
2295 | /* Go through all pid_target node */ | |
2296 | child = xmlChildElementCount(targets_node); | |
2297 | if (child == 0) { | |
2298 | /* The session is explicitly set to target nothing. */ | |
2299 | ret = lttng_untrack_pid(handle, -1); | |
2300 | if (ret) { | |
2301 | goto end; | |
2302 | } | |
2303 | } | |
2304 | for (node = xmlFirstElementChild(targets_node); node; | |
2305 | node = xmlNextElementSibling(node)) { | |
2306 | xmlNodePtr pid_target_node = node; | |
2307 | ||
2308 | /* get pid node and track it */ | |
2309 | for (node = xmlFirstElementChild(pid_target_node); node; | |
2310 | node = xmlNextElementSibling(node)) { | |
2311 | if (!strcmp((const char *) node->name, | |
2312 | config_element_pid)) { | |
2313 | int64_t pid; | |
2314 | xmlChar *content = NULL; | |
2315 | ||
2316 | content = xmlNodeGetContent(node); | |
2317 | if (!content) { | |
2318 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2319 | goto end; | |
2320 | } | |
2321 | ||
2322 | ret = parse_int(content, &pid); | |
2323 | free(content); | |
2324 | if (ret) { | |
2325 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2326 | goto end; | |
2327 | } | |
2328 | ||
2329 | ret = lttng_track_pid(handle, (int) pid); | |
2330 | if (ret) { | |
2331 | goto end; | |
2332 | } | |
2333 | } | |
2334 | } | |
2335 | node = pid_target_node; | |
2336 | } | |
2337 | ||
2338 | end: | |
2339 | return ret; | |
2340 | } | |
2341 | ||
2342 | ||
dcf266c0 JG |
2343 | static |
2344 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2345 | { | |
2346 | int ret; | |
2347 | struct lttng_domain domain = { 0 }; | |
2348 | struct lttng_handle *handle = NULL; | |
2349 | xmlNodePtr channels_node = NULL; | |
847a5916 JR |
2350 | xmlNodePtr trackers_node = NULL; |
2351 | xmlNodePtr pid_tracker_node = NULL; | |
dcf266c0 JG |
2352 | xmlNodePtr node; |
2353 | ||
2354 | assert(session_name); | |
2355 | ||
2356 | ret = init_domain(domain_node, &domain); | |
2357 | if (ret) { | |
2358 | goto end; | |
2359 | } | |
2360 | ||
2361 | handle = lttng_create_handle(session_name, &domain); | |
2362 | if (!handle) { | |
2363 | ret = -LTTNG_ERR_NOMEM; | |
2364 | goto end; | |
2365 | } | |
2366 | ||
2367 | /* get the channels node */ | |
2368 | for (node = xmlFirstElementChild(domain_node); node; | |
2369 | node = xmlNextElementSibling(node)) { | |
2370 | if (!strcmp((const char *) node->name, | |
2371 | config_element_channels)) { | |
2372 | channels_node = node; | |
2373 | break; | |
2374 | } | |
2375 | } | |
2376 | ||
2377 | if (!channels_node) { | |
2378 | goto end; | |
2379 | } | |
2380 | ||
2381 | /* create all channels */ | |
2382 | for (node = xmlFirstElementChild(channels_node); node; | |
2383 | node = xmlNextElementSibling(node)) { | |
2384 | struct lttng_channel channel; | |
2385 | xmlNodePtr contexts_node = NULL; | |
2386 | xmlNodePtr events_node = NULL; | |
2387 | xmlNodePtr channel_attr_node; | |
2388 | ||
2389 | memset(&channel, 0, sizeof(channel)); | |
2390 | lttng_channel_set_default_attr(&domain, &channel.attr); | |
2391 | ||
2392 | for (channel_attr_node = xmlFirstElementChild(node); | |
2393 | channel_attr_node; channel_attr_node = | |
2394 | xmlNextElementSibling(channel_attr_node)) { | |
2395 | ret = process_channel_attr_node(channel_attr_node, | |
2396 | &channel, &contexts_node, &events_node); | |
2397 | if (ret) { | |
2398 | goto end; | |
2399 | } | |
2400 | } | |
2401 | ||
2402 | ret = lttng_enable_channel(handle, &channel); | |
2403 | if (ret < 0) { | |
2404 | goto end; | |
2405 | } | |
2406 | ||
2407 | ret = process_events_node(events_node, handle, channel.name); | |
2408 | if (ret) { | |
2409 | goto end; | |
2410 | } | |
2411 | ||
2412 | ret = process_contexts_node(contexts_node, handle, | |
2413 | channel.name); | |
2414 | if (ret) { | |
2415 | goto end; | |
2416 | } | |
2417 | } | |
847a5916 JR |
2418 | |
2419 | /* get the trackers node */ | |
2420 | for (node = xmlFirstElementChild(domain_node); node; | |
2421 | node = xmlNextElementSibling(node)) { | |
2422 | if (!strcmp((const char *) node->name, | |
2423 | config_element_trackers)) { | |
2424 | trackers_node = node; | |
2425 | break; | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | if (!trackers_node) { | |
2430 | goto end; | |
2431 | } | |
2432 | ||
2433 | for (node = xmlFirstElementChild(trackers_node); node; | |
2434 | node = xmlNextElementSibling(node)) { | |
2435 | if (!strcmp((const char *)node->name,config_element_pid_tracker)) { | |
2436 | pid_tracker_node = node; | |
2437 | ret = process_pid_tracker_node(pid_tracker_node, handle); | |
2438 | if (ret) { | |
2439 | goto end; | |
2440 | } | |
2441 | } | |
2442 | } | |
2443 | ||
2444 | if (!pid_tracker_node) { | |
2445 | lttng_track_pid(handle, -1); | |
2446 | } | |
2447 | ||
dcf266c0 JG |
2448 | end: |
2449 | lttng_destroy_handle(handle); | |
2450 | return ret; | |
2451 | } | |
2452 | ||
2453 | static | |
2454 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
1b08cbce JR |
2455 | int overwrite, |
2456 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2457 | { |
2458 | int ret, started = -1, snapshot_mode = -1; | |
2459 | uint64_t live_timer_interval = UINT64_MAX; | |
d324faf7 | 2460 | xmlChar *name = NULL; |
9e7c9f56 | 2461 | xmlChar *shm_path = NULL; |
dcf266c0 JG |
2462 | xmlNodePtr domains_node = NULL; |
2463 | xmlNodePtr output_node = NULL; | |
2464 | xmlNodePtr node; | |
2465 | struct lttng_domain *kernel_domain = NULL; | |
2466 | struct lttng_domain *ust_domain = NULL; | |
2467 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2468 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 2469 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
2470 | |
2471 | for (node = xmlFirstElementChild(session_node); node; | |
2472 | node = xmlNextElementSibling(node)) { | |
2473 | if (!name && !strcmp((const char *) node->name, | |
2474 | config_element_name)) { | |
2475 | /* name */ | |
2476 | xmlChar *node_content = xmlNodeGetContent(node); | |
2477 | if (!node_content) { | |
2478 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2479 | goto error; |
dcf266c0 JG |
2480 | } |
2481 | ||
d324faf7 | 2482 | name = node_content; |
dcf266c0 JG |
2483 | } else if (!domains_node && !strcmp((const char *) node->name, |
2484 | config_element_domains)) { | |
2485 | /* domains */ | |
2486 | domains_node = node; | |
2487 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2488 | config_element_started)) { | |
2489 | /* started */ | |
2490 | xmlChar *node_content = xmlNodeGetContent(node); | |
2491 | if (!node_content) { | |
2492 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2493 | goto error; |
dcf266c0 JG |
2494 | } |
2495 | ||
2496 | ret = parse_bool(node_content, &started); | |
2497 | free(node_content); | |
2498 | if (ret) { | |
2499 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2500 | goto error; |
dcf266c0 JG |
2501 | } |
2502 | } else if (!output_node && !strcmp((const char *) node->name, | |
2503 | config_element_output)) { | |
2504 | /* output */ | |
2505 | output_node = node; | |
9e7c9f56 JR |
2506 | } else if (!shm_path && !strcmp((const char *) node->name, |
2507 | config_element_shared_memory_path)) { | |
2508 | /* shared memory path */ | |
2509 | xmlChar *node_content = xmlNodeGetContent(node); | |
2510 | if (!node_content) { | |
2511 | ret = -LTTNG_ERR_NOMEM; | |
2512 | goto error; | |
2513 | } | |
2514 | ||
2515 | shm_path = node_content; | |
dcf266c0 JG |
2516 | } else { |
2517 | /* attributes, snapshot_mode or live_timer_interval */ | |
2518 | xmlNodePtr attributes_child = | |
2519 | xmlFirstElementChild(node); | |
2520 | ||
2521 | if (!strcmp((const char *) attributes_child->name, | |
2522 | config_element_snapshot_mode)) { | |
2523 | /* snapshot_mode */ | |
2524 | xmlChar *snapshot_mode_content = | |
2525 | xmlNodeGetContent(attributes_child); | |
2526 | if (!snapshot_mode_content) { | |
2527 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2528 | goto error; |
dcf266c0 JG |
2529 | } |
2530 | ||
2531 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2532 | free(snapshot_mode_content); | |
2533 | if (ret) { | |
2534 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2535 | goto error; |
dcf266c0 JG |
2536 | } |
2537 | } else { | |
2538 | /* live_timer_interval */ | |
2539 | xmlChar *timer_interval_content = | |
2540 | xmlNodeGetContent(attributes_child); | |
2541 | if (!timer_interval_content) { | |
2542 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2543 | goto error; |
dcf266c0 JG |
2544 | } |
2545 | ||
2546 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2547 | free(timer_interval_content); | |
2548 | if (ret) { | |
2549 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2550 | goto error; |
dcf266c0 JG |
2551 | } |
2552 | } | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | if (!name) { | |
2557 | /* Mandatory attribute, as defined in the session XSD */ | |
2558 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2559 | goto error; |
dcf266c0 JG |
2560 | } |
2561 | ||
d324faf7 | 2562 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 2563 | /* This is not the session we are looking for */ |
c2da8cde DG |
2564 | ret = -LTTNG_ERR_NO_SESSION; |
2565 | goto error; | |
dcf266c0 JG |
2566 | } |
2567 | ||
2568 | /* Init domains to create the session handles */ | |
2569 | for (node = xmlFirstElementChild(domains_node); node; | |
2570 | node = xmlNextElementSibling(node)) { | |
2571 | struct lttng_domain *domain; | |
2572 | ||
2573 | domain = zmalloc(sizeof(*domain)); | |
2574 | if (!domain) { | |
2575 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2576 | goto error; |
dcf266c0 JG |
2577 | } |
2578 | ||
2579 | ret = init_domain(node, domain); | |
2580 | if (ret) { | |
2581 | goto domain_init_error; | |
2582 | } | |
2583 | ||
2584 | switch (domain->type) { | |
2585 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2586 | if (kernel_domain) { |
2587 | /* Same domain seen twice, invalid! */ | |
2588 | goto domain_init_error; | |
2589 | } | |
dcf266c0 JG |
2590 | kernel_domain = domain; |
2591 | break; | |
2592 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2593 | if (ust_domain) { |
2594 | /* Same domain seen twice, invalid! */ | |
2595 | goto domain_init_error; | |
2596 | } | |
dcf266c0 JG |
2597 | ust_domain = domain; |
2598 | break; | |
2599 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2600 | if (jul_domain) { |
2601 | /* Same domain seen twice, invalid! */ | |
2602 | goto domain_init_error; | |
2603 | } | |
dcf266c0 JG |
2604 | jul_domain = domain; |
2605 | break; | |
5cdb6027 DG |
2606 | case LTTNG_DOMAIN_LOG4J: |
2607 | if (log4j_domain) { | |
2608 | /* Same domain seen twice, invalid! */ | |
2609 | goto domain_init_error; | |
2610 | } | |
2611 | log4j_domain = domain; | |
2612 | break; | |
0e115563 DG |
2613 | case LTTNG_DOMAIN_PYTHON: |
2614 | if (python_domain) { | |
2615 | /* Same domain seen twice, invalid! */ | |
2616 | goto domain_init_error; | |
2617 | } | |
2618 | python_domain = domain; | |
2619 | break; | |
dcf266c0 JG |
2620 | default: |
2621 | WARN("Invalid domain type"); | |
2622 | goto domain_init_error; | |
2623 | } | |
2624 | continue; | |
2625 | domain_init_error: | |
2626 | free(domain); | |
2627 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2628 | goto error; |
dcf266c0 JG |
2629 | } |
2630 | ||
2aaf5fc7 JR |
2631 | /* Apply overrides */ |
2632 | if (overrides) { | |
2633 | if (overrides->session_name) { | |
2634 | xmlChar *name_override = xmlStrdup(BAD_CAST(overrides->session_name)); | |
2635 | if (!name_override) { | |
2636 | ret = -LTTNG_ERR_NOMEM; | |
2637 | goto error; | |
2638 | } | |
2639 | ||
2640 | /* Overrides the session name to the provided name */ | |
2641 | xmlFree(name); | |
2642 | name = name_override; | |
2643 | } | |
2644 | } | |
2645 | ||
40b4155f | 2646 | if (overwrite) { |
dcf266c0 | 2647 | /* Destroy session if it exists */ |
d324faf7 | 2648 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
2649 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
2650 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2651 | goto error; |
dcf266c0 JG |
2652 | } |
2653 | } | |
2654 | ||
2655 | /* Create session type depending on output type */ | |
2656 | if (snapshot_mode && snapshot_mode != -1) { | |
1b08cbce JR |
2657 | ret = create_snapshot_session((const char *) name, output_node, |
2658 | overrides); | |
dcf266c0 JG |
2659 | } else if (live_timer_interval && |
2660 | live_timer_interval != UINT64_MAX) { | |
d324faf7 JG |
2661 | ret = create_session((const char *) name, kernel_domain, |
2662 | ust_domain, jul_domain, log4j_domain, | |
1b08cbce | 2663 | output_node, live_timer_interval, overrides); |
dcf266c0 JG |
2664 | } else { |
2665 | /* regular session */ | |
d324faf7 JG |
2666 | ret = create_session((const char *) name, kernel_domain, |
2667 | ust_domain, jul_domain, log4j_domain, | |
1b08cbce | 2668 | output_node, UINT64_MAX, overrides); |
dcf266c0 | 2669 | } |
dcf266c0 | 2670 | if (ret) { |
c2da8cde | 2671 | goto error; |
dcf266c0 JG |
2672 | } |
2673 | ||
9e7c9f56 JR |
2674 | if (shm_path) { |
2675 | ret = lttng_set_session_shm_path((const char *) name, | |
d324faf7 | 2676 | (const char *) shm_path); |
9e7c9f56 JR |
2677 | if (ret) { |
2678 | goto error; | |
2679 | } | |
2680 | } | |
2681 | ||
dcf266c0 JG |
2682 | for (node = xmlFirstElementChild(domains_node); node; |
2683 | node = xmlNextElementSibling(node)) { | |
d324faf7 | 2684 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
2685 | if (ret) { |
2686 | goto end; | |
2687 | } | |
2688 | } | |
2689 | ||
2690 | if (started) { | |
d324faf7 | 2691 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
2692 | if (ret) { |
2693 | goto end; | |
2694 | } | |
2695 | } | |
c2da8cde | 2696 | |
dcf266c0 | 2697 | end: |
b2579dc1 | 2698 | if (ret < 0) { |
d324faf7 JG |
2699 | ERR("Failed to load session %s: %s", (const char *) name, |
2700 | lttng_strerror(ret)); | |
2701 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
2702 | } |
2703 | ||
c2da8cde | 2704 | error: |
dcf266c0 JG |
2705 | free(kernel_domain); |
2706 | free(ust_domain); | |
2707 | free(jul_domain); | |
5cdb6027 | 2708 | free(log4j_domain); |
135a3893 | 2709 | free(python_domain); |
d324faf7 | 2710 | xmlFree(name); |
9e7c9f56 | 2711 | xmlFree(shm_path); |
dcf266c0 JG |
2712 | return ret; |
2713 | } | |
2714 | ||
cf53c06d DG |
2715 | /* |
2716 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2717 | * Return -1 if the path is EPERM. | |
2718 | */ | |
2719 | static int validate_file_read_creds(const char *path) | |
2720 | { | |
2721 | int ret; | |
2722 | ||
2723 | assert(path); | |
2724 | ||
2725 | /* Can we read the file. */ | |
2726 | ret = access(path, R_OK); | |
2727 | if (!ret) { | |
2728 | goto valid; | |
2729 | } | |
2730 | if (errno == EACCES) { | |
2731 | return -1; | |
2732 | } else { | |
2733 | /* Invalid. */ | |
2734 | return 0; | |
2735 | } | |
2736 | valid: | |
2737 | return 1; | |
2738 | } | |
2739 | ||
dcf266c0 JG |
2740 | static |
2741 | int load_session_from_file(const char *path, const char *session_name, | |
1b08cbce JR |
2742 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
2743 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2744 | { |
2745 | int ret, session_found = !session_name; | |
2746 | xmlDocPtr doc = NULL; | |
2747 | xmlNodePtr sessions_node; | |
2748 | xmlNodePtr session_node; | |
dcf266c0 JG |
2749 | |
2750 | assert(path); | |
2751 | assert(validation_ctx); | |
2752 | ||
cf53c06d DG |
2753 | ret = validate_file_read_creds(path); |
2754 | if (ret != 1) { | |
2755 | if (ret == -1) { | |
2756 | ret = -LTTNG_ERR_EPERM; | |
2757 | } else { | |
2758 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2759 | } | |
dcf266c0 JG |
2760 | goto end; |
2761 | } | |
2762 | ||
2763 | doc = xmlParseFile(path); | |
2764 | if (!doc) { | |
2765 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2766 | goto end; | |
2767 | } | |
2768 | ||
2769 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2770 | if (ret) { | |
2771 | ERR("Session configuration file validation failed"); | |
2772 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2773 | goto end; | |
2774 | } | |
2775 | ||
2776 | sessions_node = xmlDocGetRootElement(doc); | |
2777 | if (!sessions_node) { | |
2778 | goto end; | |
2779 | } | |
2780 | ||
2781 | for (session_node = xmlFirstElementChild(sessions_node); | |
2782 | session_node; session_node = | |
2783 | xmlNextElementSibling(session_node)) { | |
2784 | ret = process_session_node(session_node, | |
1b08cbce | 2785 | session_name, overwrite, overrides); |
dcf266c0 JG |
2786 | if (session_name && ret == 0) { |
2787 | /* Target session found and loaded */ | |
2788 | session_found = 1; | |
2789 | break; | |
2790 | } | |
2791 | } | |
2792 | end: | |
2793 | xmlFreeDoc(doc); | |
2794 | if (!ret) { | |
a96bc65d | 2795 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2796 | } |
2797 | return ret; | |
2798 | } | |
2799 | ||
60f70355 JG |
2800 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
2801 | static | |
2802 | struct dirent *alloc_dirent(const char *path) | |
2803 | { | |
2804 | size_t len; | |
2805 | long name_max; | |
2806 | struct dirent *entry; | |
2807 | ||
2808 | name_max = pathconf(path, _PC_NAME_MAX); | |
2809 | if (name_max == -1) { | |
2810 | name_max = PATH_MAX; | |
2811 | } | |
2812 | len = offsetof(struct dirent, d_name) + name_max + 1; | |
2813 | entry = zmalloc(len); | |
2814 | return entry; | |
2815 | } | |
2816 | ||
dcf266c0 JG |
2817 | static |
2818 | int load_session_from_path(const char *path, const char *session_name, | |
1b08cbce JR |
2819 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
2820 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2821 | { |
2822 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2823 | DIR *directory = NULL; |
2824 | ||
2825 | assert(path); | |
2826 | assert(validation_ctx); | |
2827 | ||
4af16958 DG |
2828 | directory = opendir(path); |
2829 | if (!directory) { | |
11143783 DG |
2830 | switch (errno) { |
2831 | case ENOTDIR: | |
0f0a81b5 DG |
2832 | /* Try the file loading. */ |
2833 | break; | |
11143783 DG |
2834 | case ENOENT: |
2835 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2836 | goto end; | |
2837 | default: | |
0f0a81b5 DG |
2838 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2839 | goto end; | |
4af16958 | 2840 | } |
dcf266c0 | 2841 | } |
4af16958 | 2842 | if (directory) { |
dcf266c0 JG |
2843 | struct dirent *entry; |
2844 | struct dirent *result; | |
2845 | char *file_path = NULL; | |
2846 | size_t path_len = strlen(path); | |
2847 | ||
2848 | if (path_len >= PATH_MAX) { | |
2849 | ret = -LTTNG_ERR_INVALID; | |
2850 | goto end; | |
2851 | } | |
2852 | ||
60f70355 | 2853 | entry = alloc_dirent(path); |
dcf266c0 JG |
2854 | if (!entry) { |
2855 | ret = -LTTNG_ERR_NOMEM; | |
2856 | goto end; | |
2857 | } | |
2858 | ||
dcf266c0 JG |
2859 | file_path = zmalloc(PATH_MAX); |
2860 | if (!file_path) { | |
2861 | ret = -LTTNG_ERR_NOMEM; | |
2862 | free(entry); | |
2863 | goto end; | |
2864 | } | |
2865 | ||
2866 | strncpy(file_path, path, path_len); | |
2867 | if (file_path[path_len - 1] != '/') { | |
2868 | file_path[path_len++] = '/'; | |
2869 | } | |
2870 | ||
4af16958 | 2871 | ret = 0; |
dcf266c0 JG |
2872 | /* Search for *.lttng files */ |
2873 | while (!readdir_r(directory, entry, &result) && result) { | |
2874 | size_t file_name_len = strlen(result->d_name); | |
2875 | ||
2876 | if (file_name_len <= | |
2877 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2878 | continue; | |
2879 | } | |
2880 | ||
431f702e | 2881 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2882 | continue; |
2883 | } | |
2884 | ||
2885 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2886 | result->d_name + file_name_len - sizeof( | |
2887 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2888 | continue; | |
2889 | } | |
2890 | ||
2891 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2892 | file_path[path_len + file_name_len] = '\0'; | |
2893 | ||
2894 | ret = load_session_from_file(file_path, session_name, | |
1b08cbce | 2895 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
2896 | if (session_name && !ret) { |
2897 | session_found = 1; | |
2898 | break; | |
2899 | } | |
2900 | } | |
2901 | ||
2902 | free(entry); | |
2903 | free(file_path); | |
2904 | } else { | |
2905 | ret = load_session_from_file(path, session_name, | |
1b08cbce | 2906 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
2907 | if (ret) { |
2908 | goto end; | |
2909 | } else { | |
2910 | session_found = 1; | |
2911 | } | |
2912 | } | |
2913 | ||
2914 | end: | |
2915 | if (directory) { | |
2916 | if (closedir(directory)) { | |
2917 | PERROR("closedir"); | |
2918 | } | |
2919 | } | |
2920 | ||
464133ea | 2921 | if (session_found && !ret) { |
6c66fa0f | 2922 | ret = 0; |
dcf266c0 JG |
2923 | } |
2924 | ||
2925 | return ret; | |
2926 | } | |
2927 | ||
ab38c13f DG |
2928 | /* |
2929 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 2930 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
2931 | */ |
2932 | static int validate_path_creds(const char *path) | |
2933 | { | |
2934 | int ret, uid = getuid(); | |
2935 | struct stat buf; | |
2936 | ||
2937 | assert(path); | |
2938 | ||
cf53c06d | 2939 | if (uid == 0) { |
ab38c13f DG |
2940 | goto valid; |
2941 | } | |
2942 | ||
2943 | ret = stat(path, &buf); | |
2944 | if (ret < 0) { | |
2945 | if (errno != ENOENT) { | |
2946 | PERROR("stat"); | |
2947 | } | |
2948 | ret = -LTTNG_ERR_INVALID; | |
2949 | goto valid; | |
2950 | } | |
2951 | ||
2952 | if (buf.st_uid != uid) { | |
2953 | goto invalid; | |
2954 | } | |
2955 | ||
2956 | valid: | |
ab38c13f | 2957 | return 1; |
cf53c06d DG |
2958 | invalid: |
2959 | return 0; | |
ab38c13f DG |
2960 | } |
2961 | ||
dcf266c0 JG |
2962 | LTTNG_HIDDEN |
2963 | int config_load_session(const char *path, const char *session_name, | |
1b08cbce JR |
2964 | int overwrite, unsigned int autoload, |
2965 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2966 | { |
2967 | int ret; | |
6c66fa0f | 2968 | bool session_loaded = false; |
cf53c06d | 2969 | const char *path_ptr = NULL; |
dcf266c0 JG |
2970 | struct session_config_validation_ctx validation_ctx = { 0 }; |
2971 | ||
2972 | ret = init_session_config_validation_ctx(&validation_ctx); | |
2973 | if (ret) { | |
2974 | goto end; | |
2975 | } | |
2976 | ||
2977 | if (!path) { | |
ab38c13f DG |
2978 | char *home_path; |
2979 | const char *sys_path; | |
2980 | ||
dcf266c0 | 2981 | /* Try home path */ |
ab38c13f | 2982 | home_path = utils_get_home_dir(); |
dcf266c0 | 2983 | if (home_path) { |
ab38c13f | 2984 | char path[PATH_MAX]; |
dcf266c0 | 2985 | |
d4fcf703 DG |
2986 | /* |
2987 | * Try user session configuration path. Ignore error here so we can | |
2988 | * continue loading the system wide sessions. | |
2989 | */ | |
ab38c13f DG |
2990 | if (autoload) { |
2991 | ret = snprintf(path, sizeof(path), | |
2992 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
2993 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
2994 | if (ret < 0) { |
2995 | PERROR("snprintf session autoload home config path"); | |
2996 | goto end; | |
2997 | } | |
2998 | ||
2999 | /* | |
3000 | * Credentials are only validated for the autoload in order to | |
3001 | * avoid any user session daemon to try to load kernel sessions | |
3002 | * automatically and failing all the times. | |
3003 | */ | |
3004 | ret = validate_path_creds(path); | |
3005 | if (ret) { | |
3006 | path_ptr = path; | |
3007 | } | |
ab38c13f DG |
3008 | } else { |
3009 | ret = snprintf(path, sizeof(path), | |
3010 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
3011 | if (ret < 0) { |
3012 | PERROR("snprintf session home config path"); | |
3013 | goto end; | |
3014 | } | |
3015 | path_ptr = path; | |
ab38c13f | 3016 | } |
cf53c06d DG |
3017 | if (path_ptr) { |
3018 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3019 | &validation_ctx, overwrite, overrides); |
d4fcf703 DG |
3020 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
3021 | goto end; | |
3022 | } | |
3023 | /* | |
3024 | * Continue even if the session was found since we have to try | |
3025 | * the system wide sessions. | |
3026 | */ | |
6c66fa0f | 3027 | session_loaded = true; |
ab38c13f | 3028 | } |
d4fcf703 | 3029 | } |
ab38c13f | 3030 | |
cf53c06d DG |
3031 | /* Reset path pointer for the system wide dir. */ |
3032 | path_ptr = NULL; | |
3033 | ||
d4fcf703 DG |
3034 | /* Try system wide configuration directory. */ |
3035 | if (autoload) { | |
3036 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
3037 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
3038 | ret = validate_path_creds(sys_path); |
3039 | if (ret) { | |
3040 | path_ptr = sys_path; | |
3041 | } | |
d4fcf703 | 3042 | } else { |
cf53c06d DG |
3043 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
3044 | path_ptr = sys_path; | |
d4fcf703 DG |
3045 | } |
3046 | ||
cf53c06d DG |
3047 | if (path_ptr) { |
3048 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3049 | &validation_ctx, overwrite, overrides); |
6c66fa0f JG |
3050 | if (!ret) { |
3051 | session_loaded = true; | |
3052 | } | |
dcf266c0 JG |
3053 | } |
3054 | } else { | |
3055 | ret = access(path, F_OK); | |
3056 | if (ret < 0) { | |
3057 | PERROR("access"); | |
3058 | switch (errno) { | |
3059 | case ENOENT: | |
3060 | ret = -LTTNG_ERR_INVALID; | |
3061 | WARN("Session configuration path does not exist."); | |
3062 | break; | |
3063 | case EACCES: | |
3064 | ret = -LTTNG_ERR_EPERM; | |
3065 | break; | |
3066 | default: | |
3067 | ret = -LTTNG_ERR_UNK; | |
3068 | break; | |
3069 | } | |
3070 | goto end; | |
3071 | } | |
3072 | ||
3073 | ret = load_session_from_path(path, session_name, | |
1b08cbce | 3074 | &validation_ctx, overwrite, overrides); |
dcf266c0 JG |
3075 | } |
3076 | end: | |
3077 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
3078 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
3079 | /* | |
3080 | * Don't report an error if no sessions are found when called | |
3081 | * without a session_name or a search path. | |
3082 | */ | |
3083 | ret = 0; | |
3084 | } | |
6c66fa0f JG |
3085 | |
3086 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
3087 | /* A matching session was found in one of the search paths. */ | |
3088 | ret = 0; | |
3089 | } | |
dcf266c0 JG |
3090 | return ret; |
3091 | } | |
56766c75 JG |
3092 | |
3093 | static | |
3094 | void __attribute__((destructor)) session_config_exit(void) | |
3095 | { | |
3096 | xmlCleanupParser(); | |
3097 | } |