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 | 40 | #include <libxml/tree.h> |
fa8b52a2 | 41 | #include <libxml/xpath.h> |
dcf266c0 JG |
42 | #include <lttng/lttng.h> |
43 | #include <lttng/snapshot.h> | |
1501a7f3 | 44 | |
f40ef1d5 | 45 | #include "session-config.h" |
36f2332b | 46 | #include "config-internal.h" |
1501a7f3 JG |
47 | |
48 | struct handler_filter_args { | |
49 | const char* section; | |
50 | config_entry_handler_cb handler; | |
51 | void *user_data; | |
52 | }; | |
53 | ||
dcf266c0 JG |
54 | struct session_config_validation_ctx { |
55 | xmlSchemaParserCtxtPtr parser_ctx; | |
56 | xmlSchemaPtr schema; | |
57 | xmlSchemaValidCtxtPtr schema_validation_ctx; | |
58 | }; | |
59 | ||
1501a7f3 JG |
60 | const char * const config_str_yes = "yes"; |
61 | const char * const config_str_true = "true"; | |
62 | const char * const config_str_on = "on"; | |
63 | const char * const config_str_no = "no"; | |
64 | const char * const config_str_false = "false"; | |
65 | const char * const config_str_off = "off"; | |
36f2332b | 66 | const char * const config_xml_encoding = "UTF-8"; |
fb198a11 | 67 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
36f2332b JG |
68 | const char * const config_xml_indent_string = "\t"; |
69 | const char * const config_xml_true = "true"; | |
70 | const char * const config_xml_false = "false"; | |
1501a7f3 | 71 | |
fb198a11 JG |
72 | const char * const config_element_channel = "channel"; |
73 | const char * const config_element_channels = "channels"; | |
74 | const char * const config_element_domain = "domain"; | |
75 | const char * const config_element_domains = "domains"; | |
76 | const char * const config_element_event = "event"; | |
77 | const char * const config_element_events = "events"; | |
78 | const char * const config_element_context = "context"; | |
79 | const char * const config_element_contexts = "contexts"; | |
80 | const char * const config_element_attributes = "attributes"; | |
81 | const char * const config_element_exclusion = "exclusion"; | |
82 | const char * const config_element_exclusions = "exclusions"; | |
83 | const char * const config_element_function_attributes = "function_attributes"; | |
84 | const char * const config_element_probe_attributes = "probe_attributes"; | |
85 | const char * const config_element_symbol_name = "symbol_name"; | |
86 | const char * const config_element_address = "address"; | |
87 | const char * const config_element_offset = "offset"; | |
88 | const char * const config_element_name = "name"; | |
89 | const char * const config_element_enabled = "enabled"; | |
90 | const char * const config_element_overwrite_mode = "overwrite_mode"; | |
91 | const char * const config_element_subbuf_size = "subbuffer_size"; | |
92 | const char * const config_element_num_subbuf = "subbuffer_count"; | |
93 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; | |
94 | const char * const config_element_read_timer_interval = "read_timer_interval"; | |
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"; | |
7f66d5e7 JG |
132 | const char * const config_element_omit_name = "omit_name"; |
133 | const char * const config_element_omit_output = "omit_output"; | |
fb198a11 JG |
134 | |
135 | const char * const config_domain_type_kernel = "KERNEL"; | |
136 | const char * const config_domain_type_ust = "UST"; | |
137 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 138 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 139 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
140 | |
141 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
142 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
143 | const char * const config_buffer_type_global = "GLOBAL"; | |
144 | ||
145 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
146 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
147 | ||
148 | const char * const config_output_type_splice = "SPLICE"; | |
149 | const char * const config_output_type_mmap = "MMAP"; | |
150 | ||
151 | const char * const config_loglevel_type_all = "ALL"; | |
152 | const char * const config_loglevel_type_range = "RANGE"; | |
153 | const char * const config_loglevel_type_single = "SINGLE"; | |
154 | ||
155 | const char * const config_event_type_all = "ALL"; | |
156 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
157 | const char * const config_event_type_probe = "PROBE"; | |
158 | const char * const config_event_type_function = "FUNCTION"; | |
159 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
160 | const char * const config_event_type_noop = "NOOP"; | |
161 | const char * const config_event_type_syscall = "SYSCALL"; | |
162 | const char * const config_event_type_kprobe = "KPROBE"; | |
163 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
164 | ||
165 | const char * const config_event_context_pid = "PID"; | |
166 | const char * const config_event_context_procname = "PROCNAME"; | |
167 | const char * const config_event_context_prio = "PRIO"; | |
168 | const char * const config_event_context_nice = "NICE"; | |
169 | const char * const config_event_context_vpid = "VPID"; | |
170 | const char * const config_event_context_tid = "TID"; | |
171 | const char * const config_event_context_vtid = "VTID"; | |
172 | const char * const config_event_context_ppid = "PPID"; | |
173 | const char * const config_event_context_vppid = "VPPID"; | |
174 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
175 | const char * const config_event_context_hostname = "HOSTNAME"; | |
176 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 177 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
ec2ed7da JG |
178 | LTTNG_HIDDEN const char * const config_event_context_app = "APP"; |
179 | LTTNG_HIDDEN const char * const config_event_context_interruptible = "INTERRUPTIBLE"; | |
180 | LTTNG_HIDDEN const char * const config_event_context_preemptible = "PREEMPTIBLE"; | |
181 | LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE"; | |
182 | LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; | |
fb198a11 | 183 | |
fbd987c9 JG |
184 | /* Deprecated symbols */ |
185 | const char * const config_element_perf; | |
186 | ||
d7b645e2 JR |
187 | enum process_event_node_phase { |
188 | CREATION = 0, | |
189 | ENABLE = 1, | |
190 | }; | |
191 | ||
dcf266c0 JG |
192 | struct consumer_output { |
193 | int enabled; | |
194 | char *path; | |
195 | char *control_uri; | |
196 | char *data_uri; | |
197 | }; | |
198 | ||
1501a7f3 JG |
199 | static int config_entry_handler_filter(struct handler_filter_args *args, |
200 | const char *section, const char *name, const char *value) | |
201 | { | |
202 | int ret = 0; | |
203 | struct config_entry entry = { section, name, value }; | |
204 | ||
205 | assert(args); | |
206 | ||
207 | if (!section || !name || !value) { | |
208 | ret = -EIO; | |
209 | goto end; | |
210 | } | |
211 | ||
212 | if (args->section) { | |
213 | if (strcmp(args->section, section)) { | |
214 | goto end; | |
215 | } | |
216 | } | |
217 | ||
218 | ret = args->handler(&entry, args->user_data); | |
219 | end: | |
220 | return ret; | |
221 | } | |
222 | ||
223 | LTTNG_HIDDEN | |
224 | int config_get_section_entries(const char *override_path, const char *section, | |
225 | config_entry_handler_cb handler, void *user_data) | |
226 | { | |
227 | int ret = 0; | |
7ab02a27 | 228 | char *path; |
1501a7f3 JG |
229 | FILE *config_file = NULL; |
230 | struct handler_filter_args filter = { section, handler, user_data }; | |
231 | ||
7ab02a27 DG |
232 | /* First, try system-wide conf. file. */ |
233 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
234 | ||
235 | config_file = fopen(path, "r"); | |
236 | if (config_file) { | |
237 | DBG("Loading daemon conf file at %s", path); | |
238 | /* | |
239 | * Return value is not very important here since error or not, we | |
240 | * continue and try the next possible conf. file. | |
241 | */ | |
242 | (void) ini_parse_file(config_file, | |
243 | (ini_entry_handler) config_entry_handler_filter, | |
244 | (void *) &filter); | |
245 | fclose(config_file); | |
246 | } | |
247 | ||
248 | /* Second is the user local configuration. */ | |
249 | path = utils_get_home_dir(); | |
250 | if (path) { | |
251 | char fullpath[PATH_MAX]; | |
252 | ||
253 | ret = snprintf(fullpath, sizeof(fullpath), | |
254 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
255 | if (ret < 0) { | |
256 | PERROR("snprintf user conf. path"); | |
257 | goto error; | |
258 | } | |
259 | ||
260 | config_file = fopen(fullpath, "r"); | |
261 | if (config_file) { | |
262 | DBG("Loading daemon user conf file at %s", path); | |
263 | /* | |
264 | * Return value is not very important here since error or not, we | |
265 | * continue and try the next possible conf. file. | |
266 | */ | |
267 | (void) ini_parse_file(config_file, | |
268 | (ini_entry_handler) config_entry_handler_filter, | |
269 | (void *) &filter); | |
270 | fclose(config_file); | |
271 | } | |
272 | } | |
273 | ||
274 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
275 | if (override_path) { |
276 | config_file = fopen(override_path, "r"); | |
277 | if (config_file) { | |
7ab02a27 DG |
278 | DBG("Loading daemon command line conf file at %s", override_path); |
279 | (void) ini_parse_file(config_file, | |
280 | (ini_entry_handler) config_entry_handler_filter, | |
281 | (void *) &filter); | |
282 | fclose(config_file); | |
1501a7f3 JG |
283 | } else { |
284 | ERR("Failed to open daemon configuration file at %s", | |
285 | override_path); | |
286 | ret = -ENOENT; | |
7ab02a27 | 287 | goto error; |
1501a7f3 JG |
288 | } |
289 | } | |
290 | ||
7ab02a27 DG |
291 | /* Everything went well. */ |
292 | ret = 0; | |
1501a7f3 | 293 | |
7ab02a27 | 294 | error: |
1501a7f3 JG |
295 | return ret; |
296 | } | |
297 | ||
298 | LTTNG_HIDDEN | |
299 | int config_parse_value(const char *value) | |
300 | { | |
301 | int i, ret = 0; | |
302 | char *endptr, *lower_str; | |
303 | size_t len; | |
304 | unsigned long v; | |
305 | ||
306 | len = strlen(value); | |
307 | if (!len) { | |
308 | ret = -1; | |
309 | goto end; | |
310 | } | |
311 | ||
312 | v = strtoul(value, &endptr, 10); | |
313 | if (endptr != value) { | |
314 | ret = v; | |
315 | goto end; | |
316 | } | |
317 | ||
318 | lower_str = zmalloc(len + 1); | |
319 | if (!lower_str) { | |
320 | PERROR("zmalloc"); | |
321 | ret = -errno; | |
322 | goto end; | |
323 | } | |
324 | ||
325 | for (i = 0; i < len; i++) { | |
326 | lower_str[i] = tolower(value[i]); | |
327 | } | |
328 | ||
329 | if (!strcmp(lower_str, config_str_yes) || | |
330 | !strcmp(lower_str, config_str_true) || | |
331 | !strcmp(lower_str, config_str_on)) { | |
332 | ret = 1; | |
333 | } else if (!strcmp(lower_str, config_str_no) || | |
334 | !strcmp(lower_str, config_str_false) || | |
335 | !strcmp(lower_str, config_str_off)) { | |
336 | ret = 0; | |
337 | } else { | |
338 | ret = -1; | |
339 | } | |
340 | ||
341 | free(lower_str); | |
342 | end: | |
343 | return ret; | |
344 | } | |
36f2332b JG |
345 | |
346 | /* | |
347 | * Returns a xmlChar string which must be released using xmlFree(). | |
348 | */ | |
349 | static xmlChar *encode_string(const char *in_str) | |
350 | { | |
351 | xmlChar *out_str = NULL; | |
352 | xmlCharEncodingHandlerPtr handler; | |
353 | int out_len, ret, in_len; | |
354 | ||
355 | assert(in_str); | |
356 | ||
357 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
358 | if (!handler) { | |
359 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
360 | goto end; | |
361 | } | |
362 | ||
363 | in_len = strlen(in_str); | |
364 | /* | |
f76d886f JG |
365 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
366 | * used because UTF-8 characters can take up to 4 bytes. | |
36f2332b | 367 | */ |
f76d886f | 368 | out_len = (in_len * 4) + 1; |
36f2332b JG |
369 | out_str = xmlMalloc(out_len); |
370 | if (!out_str) { | |
371 | goto end; | |
372 | } | |
373 | ||
374 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
375 | if (ret < 0) { | |
376 | xmlFree(out_str); | |
377 | out_str = NULL; | |
378 | goto end; | |
379 | } | |
380 | ||
381 | /* out_len is now the size of out_str */ | |
382 | out_str[out_len] = '\0'; | |
383 | end: | |
384 | return out_str; | |
385 | } | |
386 | ||
387 | LTTNG_HIDDEN | |
705bb62f | 388 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
389 | { |
390 | int ret; | |
391 | struct config_writer *writer; | |
392 | xmlOutputBufferPtr buffer; | |
393 | ||
394 | writer = zmalloc(sizeof(struct config_writer)); | |
395 | if (!writer) { | |
396 | PERROR("zmalloc config_writer_create"); | |
397 | goto end; | |
398 | } | |
399 | ||
400 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
401 | if (!buffer) { | |
402 | goto error_destroy; | |
403 | } | |
404 | ||
405 | writer->writer = xmlNewTextWriter(buffer); | |
406 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
407 | config_xml_encoding, NULL); | |
408 | if (ret < 0) { | |
409 | goto error_destroy; | |
410 | } | |
411 | ||
412 | ret = xmlTextWriterSetIndentString(writer->writer, | |
413 | BAD_CAST config_xml_indent_string); | |
705bb62f | 414 | if (ret) { |
36f2332b JG |
415 | goto error_destroy; |
416 | } | |
417 | ||
705bb62f JRJ |
418 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
419 | if (ret) { | |
36f2332b JG |
420 | goto error_destroy; |
421 | } | |
422 | ||
423 | end: | |
424 | return writer; | |
425 | error_destroy: | |
426 | config_writer_destroy(writer); | |
427 | return NULL; | |
428 | } | |
429 | ||
430 | LTTNG_HIDDEN | |
431 | int config_writer_destroy(struct config_writer *writer) | |
432 | { | |
433 | int ret = 0; | |
434 | ||
435 | if (!writer) { | |
436 | ret = -EINVAL; | |
437 | goto end; | |
438 | } | |
439 | ||
440 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
441 | WARN("Could not close XML document"); | |
442 | ret = -EIO; | |
443 | } | |
444 | ||
445 | if (writer->writer) { | |
446 | xmlFreeTextWriter(writer->writer); | |
447 | } | |
448 | ||
449 | free(writer); | |
450 | end: | |
451 | return ret; | |
452 | } | |
453 | ||
454 | LTTNG_HIDDEN | |
455 | int config_writer_open_element(struct config_writer *writer, | |
456 | const char *element_name) | |
457 | { | |
458 | int ret; | |
459 | xmlChar *encoded_element_name; | |
460 | ||
461 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
462 | ret = -1; | |
463 | goto end; | |
464 | } | |
465 | ||
466 | encoded_element_name = encode_string(element_name); | |
467 | if (!encoded_element_name) { | |
468 | ret = -1; | |
469 | goto end; | |
470 | } | |
471 | ||
472 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
473 | xmlFree(encoded_element_name); | |
474 | end: | |
28676a1d | 475 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
476 | } |
477 | ||
e10b6a1c JG |
478 | LTTNG_HIDDEN |
479 | int config_writer_write_attribute(struct config_writer *writer, | |
480 | const char *name, const char *value) | |
481 | { | |
482 | int ret; | |
483 | xmlChar *encoded_name = NULL; | |
484 | xmlChar *encoded_value = NULL; | |
485 | ||
486 | if (!writer || !writer->writer || !name || !name[0]) { | |
487 | ret = -1; | |
488 | goto end; | |
489 | } | |
490 | ||
491 | encoded_name = encode_string(name); | |
492 | if (!encoded_name) { | |
493 | ret = -1; | |
494 | goto end; | |
495 | } | |
496 | ||
497 | encoded_value = encode_string(value); | |
498 | if (!encoded_value) { | |
499 | ret = -1; | |
500 | goto end; | |
501 | } | |
502 | ||
503 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, | |
504 | encoded_value); | |
505 | end: | |
506 | xmlFree(encoded_name); | |
507 | xmlFree(encoded_value); | |
508 | return ret >= 0 ? 0 : ret; | |
509 | } | |
510 | ||
36f2332b JG |
511 | LTTNG_HIDDEN |
512 | int config_writer_close_element(struct config_writer *writer) | |
513 | { | |
514 | int ret; | |
515 | ||
516 | if (!writer || !writer->writer) { | |
517 | ret = -1; | |
518 | goto end; | |
519 | } | |
520 | ||
521 | ret = xmlTextWriterEndElement(writer->writer); | |
522 | end: | |
28676a1d | 523 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
524 | } |
525 | ||
526 | LTTNG_HIDDEN | |
527 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
528 | const char *element_name, uint64_t value) | |
529 | { | |
530 | int ret; | |
531 | xmlChar *encoded_element_name; | |
532 | ||
533 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
534 | ret = -1; | |
535 | goto end; | |
536 | } | |
537 | ||
538 | encoded_element_name = encode_string(element_name); | |
539 | if (!encoded_element_name) { | |
540 | ret = -1; | |
541 | goto end; | |
542 | } | |
543 | ||
544 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
545 | encoded_element_name, "%" PRIu64, value); | |
546 | xmlFree(encoded_element_name); | |
547 | end: | |
28676a1d | 548 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
549 | } |
550 | ||
551 | LTTNG_HIDDEN | |
552 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
553 | const char *element_name, int64_t value) | |
554 | { | |
555 | int ret; | |
556 | xmlChar *encoded_element_name; | |
557 | ||
558 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
559 | ret = -1; | |
560 | goto end; | |
561 | } | |
562 | ||
563 | encoded_element_name = encode_string(element_name); | |
564 | if (!encoded_element_name) { | |
565 | ret = -1; | |
566 | goto end; | |
567 | } | |
568 | ||
569 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
570 | encoded_element_name, "%" PRIi64, value); | |
571 | xmlFree(encoded_element_name); | |
572 | end: | |
28676a1d | 573 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
574 | } |
575 | ||
576 | LTTNG_HIDDEN | |
577 | int config_writer_write_element_bool(struct config_writer *writer, | |
578 | const char *element_name, int value) | |
579 | { | |
580 | return config_writer_write_element_string(writer, element_name, | |
581 | value ? config_xml_true : config_xml_false); | |
582 | } | |
583 | ||
584 | LTTNG_HIDDEN | |
585 | int config_writer_write_element_string(struct config_writer *writer, | |
586 | const char *element_name, const char *value) | |
587 | { | |
588 | int ret; | |
589 | xmlChar *encoded_element_name = NULL; | |
590 | xmlChar *encoded_value = NULL; | |
591 | ||
592 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
593 | !value) { | |
594 | ret = -1; | |
595 | goto end; | |
596 | } | |
597 | ||
598 | encoded_element_name = encode_string(element_name); | |
599 | if (!encoded_element_name) { | |
600 | ret = -1; | |
601 | goto end; | |
602 | } | |
603 | ||
604 | encoded_value = encode_string(value); | |
605 | if (!encoded_value) { | |
606 | ret = -1; | |
607 | goto end; | |
608 | } | |
609 | ||
610 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 611 | encoded_value); |
36f2332b JG |
612 | end: |
613 | xmlFree(encoded_element_name); | |
614 | xmlFree(encoded_value); | |
28676a1d | 615 | return ret >= 0 ? 0 : ret; |
36f2332b | 616 | } |
dcf266c0 JG |
617 | |
618 | static | |
619 | void xml_error_handler(void *ctx, const char *format, ...) | |
620 | { | |
621 | char *errMsg; | |
622 | va_list args; | |
623 | int ret; | |
624 | ||
625 | va_start(args, format); | |
626 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 627 | va_end(args); |
dcf266c0 JG |
628 | if (ret == -1) { |
629 | ERR("String allocation failed in xml error handler"); | |
630 | return; | |
631 | } | |
dcf266c0 JG |
632 | |
633 | fprintf(stderr, "XML Error: %s", errMsg); | |
634 | free(errMsg); | |
635 | } | |
636 | ||
637 | static | |
638 | void fini_session_config_validation_ctx( | |
639 | struct session_config_validation_ctx *ctx) | |
640 | { | |
641 | if (ctx->parser_ctx) { | |
642 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
643 | } | |
644 | ||
645 | if (ctx->schema) { | |
646 | xmlSchemaFree(ctx->schema); | |
647 | } | |
648 | ||
649 | if (ctx->schema_validation_ctx) { | |
650 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
651 | } | |
652 | ||
653 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
654 | } | |
655 | ||
54e399cb JG |
656 | static |
657 | char *get_session_config_xsd_path() | |
658 | { | |
659 | char *xsd_path; | |
e8fa9fb0 | 660 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
661 | size_t base_path_len; |
662 | size_t max_path_len; | |
663 | ||
664 | if (!base_path) { | |
665 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
666 | } | |
667 | ||
668 | base_path_len = strlen(base_path); | |
669 | max_path_len = base_path_len + | |
670 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
671 | xsd_path = zmalloc(max_path_len); | |
672 | if (!xsd_path) { | |
673 | goto end; | |
674 | } | |
675 | ||
676 | strncpy(xsd_path, base_path, max_path_len); | |
677 | if (xsd_path[base_path_len - 1] != '/') { | |
678 | xsd_path[base_path_len++] = '/'; | |
679 | } | |
680 | ||
681 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
682 | max_path_len - base_path_len); | |
683 | end: | |
684 | return xsd_path; | |
685 | } | |
686 | ||
dcf266c0 JG |
687 | static |
688 | int init_session_config_validation_ctx( | |
689 | struct session_config_validation_ctx *ctx) | |
690 | { | |
691 | int ret; | |
54e399cb JG |
692 | char *xsd_path = get_session_config_xsd_path(); |
693 | ||
694 | if (!xsd_path) { | |
695 | ret = -LTTNG_ERR_NOMEM; | |
696 | goto end; | |
697 | } | |
dcf266c0 | 698 | |
54e399cb | 699 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
700 | if (!ctx->parser_ctx) { |
701 | ERR("XSD parser context creation failed"); | |
702 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
703 | goto end; | |
704 | } | |
705 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
706 | xml_error_handler, NULL); | |
707 | ||
708 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
709 | if (!ctx->schema) { | |
710 | ERR("XSD parsing failed"); | |
711 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
712 | goto end; | |
713 | } | |
714 | ||
715 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
716 | if (!ctx->schema_validation_ctx) { | |
717 | ERR("XSD validation context creation failed"); | |
718 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
719 | goto end; | |
720 | } | |
721 | ||
722 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
723 | xml_error_handler, NULL); | |
724 | ret = 0; | |
725 | ||
726 | end: | |
727 | if (ret) { | |
728 | fini_session_config_validation_ctx(ctx); | |
729 | } | |
730 | ||
54e399cb | 731 | free(xsd_path); |
dcf266c0 JG |
732 | return ret; |
733 | } | |
734 | ||
735 | static | |
736 | int parse_uint(xmlChar *str, uint64_t *val) | |
737 | { | |
738 | int ret; | |
739 | char *endptr; | |
740 | ||
741 | if (!str || !val) { | |
742 | ret = -1; | |
743 | goto end; | |
744 | } | |
745 | ||
746 | *val = strtoull((const char *) str, &endptr, 10); | |
747 | if (!endptr || *endptr) { | |
748 | ret = -1; | |
749 | } else { | |
750 | ret = 0; | |
751 | } | |
752 | ||
753 | end: | |
754 | return ret; | |
755 | } | |
756 | ||
757 | static | |
758 | int parse_int(xmlChar *str, int64_t *val) | |
759 | { | |
760 | int ret; | |
761 | char *endptr; | |
762 | ||
763 | if (!str || !val) { | |
764 | ret = -1; | |
765 | goto end; | |
766 | } | |
767 | ||
768 | *val = strtoll((const char *) str, &endptr, 10); | |
769 | if (!endptr || *endptr) { | |
770 | ret = -1; | |
771 | } else { | |
772 | ret = 0; | |
773 | } | |
774 | ||
775 | end: | |
776 | return ret; | |
777 | } | |
778 | ||
779 | static | |
780 | int parse_bool(xmlChar *str, int *val) | |
781 | { | |
782 | int ret = 0; | |
783 | ||
784 | if (!str || !val) { | |
785 | ret = -1; | |
786 | goto end; | |
787 | } | |
788 | ||
789 | if (!strcmp((const char *) str, config_xml_true)) { | |
790 | *val = 1; | |
791 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
792 | *val = 0; | |
793 | } else { | |
794 | WARN("Invalid boolean value encoutered (%s).", | |
795 | (const char *) str); | |
796 | ret = -1; | |
797 | } | |
798 | end: | |
799 | return ret; | |
800 | } | |
801 | ||
802 | static | |
803 | int get_domain_type(xmlChar *domain) | |
804 | { | |
805 | int ret; | |
806 | ||
807 | if (!domain) { | |
808 | goto error; | |
809 | } | |
810 | ||
811 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
812 | ret = LTTNG_DOMAIN_KERNEL; | |
813 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
814 | ret = LTTNG_DOMAIN_UST; | |
815 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
816 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
817 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
818 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
819 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
820 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
821 | } else { |
822 | goto error; | |
823 | } | |
824 | ||
825 | return ret; | |
826 | error: | |
827 | return -1; | |
828 | } | |
829 | ||
830 | static | |
831 | int get_buffer_type(xmlChar *buffer_type) | |
832 | { | |
833 | int ret; | |
834 | ||
835 | if (!buffer_type) { | |
836 | goto error; | |
837 | } | |
838 | ||
839 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
840 | ret = LTTNG_BUFFER_GLOBAL; | |
841 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
842 | ret = LTTNG_BUFFER_PER_UID; | |
843 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
844 | ret = LTTNG_BUFFER_PER_PID; | |
845 | } else { | |
846 | goto error; | |
847 | } | |
848 | ||
849 | return ret; | |
850 | error: | |
851 | return -1; | |
852 | } | |
853 | ||
854 | static | |
855 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
856 | { | |
857 | int ret; | |
858 | ||
859 | if (!overwrite_mode) { | |
860 | goto error; | |
861 | } | |
862 | ||
863 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
864 | ret = 1; | |
865 | } else if (!strcmp((char *) overwrite_mode, | |
866 | config_overwrite_mode_discard)) { | |
867 | ret = 0; | |
868 | } else { | |
869 | goto error; | |
870 | } | |
871 | ||
872 | return ret; | |
873 | error: | |
874 | return -1; | |
875 | } | |
876 | ||
877 | static | |
878 | int get_output_type(xmlChar *output_type) | |
879 | { | |
880 | int ret; | |
881 | ||
882 | if (!output_type) { | |
883 | goto error; | |
884 | } | |
885 | ||
886 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
887 | ret = LTTNG_EVENT_MMAP; | |
888 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
889 | ret = LTTNG_EVENT_SPLICE; | |
890 | } else { | |
891 | goto error; | |
892 | } | |
893 | ||
894 | return ret; | |
895 | error: | |
896 | return -1; | |
897 | } | |
898 | ||
899 | static | |
900 | int get_event_type(xmlChar *event_type) | |
901 | { | |
902 | int ret; | |
903 | ||
904 | if (!event_type) { | |
905 | goto error; | |
906 | } | |
907 | ||
908 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
909 | ret = LTTNG_EVENT_ALL; | |
910 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
911 | ret = LTTNG_EVENT_TRACEPOINT; | |
912 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
913 | ret = LTTNG_EVENT_PROBE; | |
914 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
915 | ret = LTTNG_EVENT_FUNCTION; | |
916 | } else if (!strcmp((char *) event_type, | |
917 | config_event_type_function_entry)) { | |
918 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
919 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
920 | ret = LTTNG_EVENT_NOOP; | |
921 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
922 | ret = LTTNG_EVENT_SYSCALL; | |
923 | } else { | |
924 | goto error; | |
925 | } | |
926 | ||
927 | return ret; | |
928 | error: | |
929 | return -1; | |
930 | } | |
931 | ||
932 | static | |
933 | int get_loglevel_type(xmlChar *loglevel_type) | |
934 | { | |
935 | int ret; | |
936 | ||
937 | if (!loglevel_type) { | |
938 | goto error; | |
939 | } | |
940 | ||
941 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
942 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
943 | } else if (!strcmp((char *) loglevel_type, | |
944 | config_loglevel_type_range)) { | |
945 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
946 | } else if (!strcmp((char *) loglevel_type, | |
947 | config_loglevel_type_single)) { | |
948 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
949 | } else { | |
950 | goto error; | |
951 | } | |
952 | ||
953 | return ret; | |
954 | error: | |
955 | return -1; | |
956 | } | |
957 | ||
958 | /* | |
959 | * Return the context type or -1 on error. | |
960 | */ | |
961 | static | |
962 | int get_context_type(xmlChar *context_type) | |
963 | { | |
964 | int ret; | |
965 | ||
966 | if (!context_type) { | |
967 | goto error; | |
968 | } | |
969 | ||
970 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
971 | ret = LTTNG_EVENT_CONTEXT_PID; | |
972 | } else if (!strcmp((char *) context_type, | |
973 | config_event_context_procname)) { | |
974 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
975 | } else if (!strcmp((char *) context_type, | |
976 | config_event_context_prio)) { | |
977 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
978 | } else if (!strcmp((char *) context_type, | |
979 | config_event_context_nice)) { | |
980 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
981 | } else if (!strcmp((char *) context_type, | |
982 | config_event_context_vpid)) { | |
983 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
984 | } else if (!strcmp((char *) context_type, | |
985 | config_event_context_tid)) { | |
986 | ret = LTTNG_EVENT_CONTEXT_TID; | |
987 | } else if (!strcmp((char *) context_type, | |
988 | config_event_context_vtid)) { | |
989 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
990 | } else if (!strcmp((char *) context_type, | |
991 | config_event_context_ppid)) { | |
992 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
993 | } else if (!strcmp((char *) context_type, | |
994 | config_event_context_vppid)) { | |
995 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
996 | } else if (!strcmp((char *) context_type, | |
997 | config_event_context_pthread_id)) { | |
998 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
999 | } else if (!strcmp((char *) context_type, | |
1000 | config_event_context_hostname)) { | |
1001 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
1002 | } else if (!strcmp((char *) context_type, | |
1003 | config_event_context_ip)) { | |
1004 | ret = LTTNG_EVENT_CONTEXT_IP; | |
1ae5e83e JD |
1005 | } else if (!strcmp((char *) context_type, |
1006 | config_event_context_interruptible)) { | |
1007 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; | |
1008 | } else if (!strcmp((char *) context_type, | |
1009 | config_event_context_preemptible)) { | |
1010 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; | |
1011 | } else if (!strcmp((char *) context_type, | |
1012 | config_event_context_need_reschedule)) { | |
1013 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; | |
1014 | } else if (!strcmp((char *) context_type, | |
1015 | config_event_context_migratable)) { | |
1016 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; | |
dcf266c0 JG |
1017 | } else { |
1018 | goto error; | |
1019 | } | |
1020 | ||
1021 | return ret; | |
1022 | error: | |
1023 | return -1; | |
1024 | } | |
1025 | ||
1026 | static | |
1027 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
1028 | { | |
1029 | int ret; | |
1030 | xmlNodePtr node; | |
1031 | ||
1032 | for (node = xmlFirstElementChild(domain_node); node; | |
1033 | node = xmlNextElementSibling(node)) { | |
1034 | if (!strcmp((const char *) node->name, config_element_type)) { | |
1035 | /* domain type */ | |
1036 | xmlChar *node_content = xmlNodeGetContent(node); | |
1037 | if (!node_content) { | |
1038 | ret = -LTTNG_ERR_NOMEM; | |
1039 | goto end; | |
1040 | } | |
1041 | ||
1042 | ret = get_domain_type(node_content); | |
1043 | free(node_content); | |
1044 | if (ret < 0) { | |
1045 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1046 | goto end; | |
1047 | } | |
1048 | ||
1049 | domain->type = ret; | |
1050 | } else if (!strcmp((const char *) node->name, | |
1051 | config_element_buffer_type)) { | |
1052 | /* buffer type */ | |
1053 | xmlChar *node_content = xmlNodeGetContent(node); | |
1054 | if (!node_content) { | |
1055 | ret = -LTTNG_ERR_NOMEM; | |
1056 | goto end; | |
1057 | } | |
1058 | ||
1059 | ret = get_buffer_type(node_content); | |
1060 | free(node_content); | |
1061 | if (ret < 0) { | |
1062 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1063 | goto end; | |
1064 | } | |
1065 | ||
1066 | domain->buf_type = ret; | |
1067 | } | |
1068 | } | |
1069 | ret = 0; | |
1070 | end: | |
1071 | return ret; | |
1072 | } | |
1073 | ||
1074 | static | |
1075 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1076 | char **data_uri) | |
1077 | { | |
1078 | xmlNodePtr node; | |
1079 | ||
1080 | for (node = xmlFirstElementChild(net_output_node); node; | |
1081 | node = xmlNextElementSibling(node)) { | |
1082 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1083 | /* control_uri */ | |
1084 | *control_uri = (char *) xmlNodeGetContent(node); | |
1085 | if (!*control_uri) { | |
1086 | break; | |
1087 | } | |
1088 | } else { | |
1089 | /* data_uri */ | |
1090 | *data_uri = (char *) xmlNodeGetContent(node); | |
1091 | if (!*data_uri) { | |
1092 | break; | |
1093 | } | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1098 | } | |
1099 | ||
1100 | static | |
1101 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1102 | struct consumer_output *output) | |
1103 | { | |
1104 | int ret; | |
1105 | xmlNodePtr node; | |
1106 | ||
1107 | assert(output); | |
1108 | ||
1109 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1110 | node = xmlNextElementSibling(node)) { | |
1111 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1112 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1113 | ||
1114 | /* enabled */ | |
1115 | if (!enabled_str) { | |
1116 | ret = -LTTNG_ERR_NOMEM; | |
1117 | goto end; | |
1118 | } | |
1119 | ||
1120 | ret = parse_bool(enabled_str, &output->enabled); | |
1121 | free(enabled_str); | |
1122 | if (ret) { | |
1123 | goto end; | |
1124 | } | |
1125 | } else { | |
1126 | xmlNodePtr output_type_node; | |
1127 | ||
1128 | /* destination */ | |
1129 | output_type_node = xmlFirstElementChild(node); | |
1130 | if (!output_type_node) { | |
1131 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1132 | goto end; | |
1133 | } | |
1134 | ||
1135 | if (!strcmp((const char *) output_type_node->name, | |
1136 | config_element_path)) { | |
1137 | /* path */ | |
1138 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1139 | if (!output->path) { | |
1140 | ret = -LTTNG_ERR_NOMEM; | |
1141 | goto end; | |
1142 | } | |
1143 | } else { | |
1144 | /* net_output */ | |
1145 | ret = get_net_output_uris(output_type_node, | |
1146 | &output->control_uri, &output->data_uri); | |
1147 | if (ret) { | |
1148 | goto end; | |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | } | |
1153 | ret = 0; | |
1154 | ||
1155 | end: | |
1156 | if (ret) { | |
1157 | free(output->path); | |
1158 | free(output->control_uri); | |
1159 | free(output->data_uri); | |
1160 | memset(output, 0, sizeof(struct consumer_output)); | |
1161 | } | |
1162 | return ret; | |
1163 | } | |
1164 | ||
1165 | static | |
95681498 JG |
1166 | int create_session_net_output(const char *name, const char *control_uri, |
1167 | const char *data_uri) | |
dcf266c0 JG |
1168 | { |
1169 | int ret; | |
1170 | struct lttng_handle *handle; | |
1171 | const char *uri = NULL; | |
1172 | ||
1173 | assert(name); | |
dcf266c0 | 1174 | |
95681498 | 1175 | handle = lttng_create_handle(name, NULL); |
dcf266c0 JG |
1176 | if (!handle) { |
1177 | ret = -LTTNG_ERR_NOMEM; | |
1178 | goto end; | |
1179 | } | |
1180 | ||
1181 | if (!control_uri || !data_uri) { | |
1182 | uri = control_uri ? control_uri : data_uri; | |
1183 | control_uri = uri; | |
1184 | data_uri = uri; | |
1185 | } | |
1186 | ||
1187 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1188 | lttng_destroy_handle(handle); | |
1189 | end: | |
1190 | return ret; | |
1191 | } | |
1192 | ||
1193 | static | |
1194 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node) | |
1195 | { | |
1196 | int ret; | |
1197 | xmlNodePtr node = NULL; | |
1198 | xmlNodePtr snapshot_output_list_node; | |
1199 | xmlNodePtr snapshot_output_node; | |
1200 | ||
1201 | assert(session_name); | |
1202 | ||
1203 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1204 | if (ret) { | |
1205 | goto end; | |
1206 | } | |
1207 | ||
1208 | if (!output_node) { | |
1209 | goto end; | |
1210 | } | |
1211 | ||
1212 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1213 | ||
1214 | /* Parse and create snapshot outputs */ | |
1215 | ||
1216 | for (snapshot_output_node = | |
1217 | xmlFirstElementChild(snapshot_output_list_node); | |
1218 | snapshot_output_node; snapshot_output_node = | |
1219 | xmlNextElementSibling(snapshot_output_node)) { | |
1220 | char *name = NULL; | |
98e0892f | 1221 | uint64_t max_size = DEFAULT_SNAPSHOT_MAX_SIZE; |
dcf266c0 JG |
1222 | struct consumer_output output = { 0 }; |
1223 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1224 | ||
1225 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1226 | node = xmlNextElementSibling(node)) { | |
1227 | if (!strcmp((const char *) node->name, | |
1228 | config_element_name)) { | |
1229 | /* name */ | |
1230 | name = (char *) xmlNodeGetContent(node); | |
1231 | if (!name) { | |
1232 | ret = -LTTNG_ERR_NOMEM; | |
1233 | goto error_snapshot_output; | |
1234 | } | |
1235 | } else if (!strcmp((const char *) node->name, | |
1236 | config_element_max_size)) { | |
1237 | xmlChar *content = xmlNodeGetContent(node); | |
1238 | ||
1239 | /* max_size */ | |
1240 | if (!content) { | |
1241 | ret = -LTTNG_ERR_NOMEM; | |
1242 | goto error_snapshot_output; | |
1243 | } | |
1244 | ret = parse_uint(content, &max_size); | |
1245 | free(content); | |
1246 | if (ret) { | |
1247 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1248 | goto error_snapshot_output; | |
1249 | } | |
1250 | } else { | |
1251 | /* consumer_output */ | |
1252 | ret = process_consumer_output(node, &output); | |
1253 | if (ret) { | |
1254 | goto error_snapshot_output; | |
1255 | } | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | snapshot_output = lttng_snapshot_output_create(); | |
1260 | if (!snapshot_output) { | |
1261 | ret = -LTTNG_ERR_NOMEM; | |
1262 | goto error_snapshot_output; | |
1263 | } | |
1264 | ||
98e0892f JR |
1265 | if (!name) { |
1266 | /* Generate a default name */ | |
1267 | int pret; | |
1268 | pret = asprintf(&name, DEFAULT_SNAPSHOT_NAME "-%" PRIu32, | |
1269 | lttng_snapshot_output_get_id(snapshot_output)); | |
1270 | if (pret < 0) { | |
1271 | name = NULL; | |
1272 | PERROR("snprintf output name"); | |
1273 | goto error_snapshot_output; | |
1274 | } | |
1275 | } | |
1276 | ||
dcf266c0 JG |
1277 | ret = lttng_snapshot_output_set_name(name, snapshot_output); |
1278 | if (ret) { | |
1279 | goto error_snapshot_output; | |
1280 | } | |
1281 | ||
1282 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1283 | if (ret) { | |
1284 | goto error_snapshot_output; | |
1285 | } | |
1286 | ||
1287 | if (output.path) { | |
1288 | ret = lttng_snapshot_output_set_ctrl_url(output.path, | |
1289 | snapshot_output); | |
1290 | if (ret) { | |
1291 | goto error_snapshot_output; | |
1292 | } | |
1293 | } else { | |
1294 | if (output.control_uri) { | |
1295 | ret = lttng_snapshot_output_set_ctrl_url(output.control_uri, | |
1296 | snapshot_output); | |
1297 | if (ret) { | |
1298 | goto error_snapshot_output; | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | if (output.data_uri) { | |
1303 | ret = lttng_snapshot_output_set_data_url(output.data_uri, | |
1304 | snapshot_output); | |
1305 | if (ret) { | |
1306 | goto error_snapshot_output; | |
1307 | } | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1312 | error_snapshot_output: | |
1313 | free(name); | |
1314 | free(output.path); | |
1315 | free(output.control_uri); | |
1316 | free(output.data_uri); | |
1317 | lttng_snapshot_output_destroy(snapshot_output); | |
1318 | if (ret) { | |
1319 | goto end; | |
1320 | } | |
1321 | } | |
1322 | end: | |
1323 | return ret; | |
1324 | } | |
1325 | ||
1326 | static | |
1327 | int create_session(const char *name, | |
1328 | struct lttng_domain *kernel_domain, | |
1329 | struct lttng_domain *ust_domain, | |
1330 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1331 | struct lttng_domain *log4j_domain, |
dcf266c0 JG |
1332 | xmlNodePtr output_node, |
1333 | uint64_t live_timer_interval) | |
1334 | { | |
1335 | int ret; | |
1336 | struct consumer_output output = { 0 }; | |
1337 | xmlNodePtr consumer_output_node; | |
1338 | ||
1339 | assert(name); | |
dcf266c0 JG |
1340 | |
1341 | if (output_node) { | |
1342 | consumer_output_node = xmlFirstElementChild(output_node); | |
1343 | if (!consumer_output_node) { | |
1344 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1345 | goto end; | |
1346 | } | |
1347 | ||
1348 | if (strcmp((const char *) consumer_output_node->name, | |
1349 | config_element_consumer_output)) { | |
1350 | WARN("Invalid output type, expected %s node", | |
1351 | config_element_consumer_output); | |
1352 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1353 | goto end; | |
1354 | } | |
1355 | ||
1356 | ret = process_consumer_output(consumer_output_node, &output); | |
1357 | if (ret) { | |
1358 | goto end; | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | if (live_timer_interval != UINT64_MAX && | |
1363 | !output.control_uri && !output.data_uri) { | |
1364 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1365 | goto end; | |
1366 | } | |
1367 | ||
1368 | if (output.control_uri || output.data_uri) { | |
dcf266c0 JG |
1369 | /* network destination */ |
1370 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1371 | /* |
1372 | * URLs are provided for sure since the test above make sure that | |
1373 | * with a live timer the data and control URIs are provided. So, | |
1374 | * NULL is passed here and will be set right after. | |
1375 | */ | |
1376 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1377 | } else { |
1378 | ret = lttng_create_session(name, NULL); | |
1379 | } | |
1380 | if (ret) { | |
1381 | goto end; | |
1382 | } | |
1383 | ||
95681498 JG |
1384 | ret = create_session_net_output(name, output.control_uri, |
1385 | output.data_uri); | |
1386 | if (ret) { | |
1387 | goto end; | |
dcf266c0 | 1388 | } |
95681498 | 1389 | |
dcf266c0 JG |
1390 | } else { |
1391 | /* either local output or no output */ | |
1392 | ret = lttng_create_session(name, output.path); | |
1393 | if (ret) { | |
1394 | goto end; | |
1395 | } | |
1396 | } | |
1397 | end: | |
1398 | free(output.path); | |
1399 | free(output.control_uri); | |
1400 | free(output.data_uri); | |
1401 | return ret; | |
1402 | } | |
1403 | static | |
1404 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1405 | struct lttng_event_probe_attr *attr) | |
1406 | { | |
1407 | int ret; | |
1408 | ||
1409 | assert(probe_attribute_node); | |
1410 | assert(attr); | |
1411 | ||
1412 | if (!strcmp((const char *) probe_attribute_node->name, | |
1413 | config_element_address)) { | |
1414 | xmlChar *content; | |
1415 | uint64_t addr = 0; | |
1416 | ||
1417 | /* addr */ | |
1418 | content = xmlNodeGetContent(probe_attribute_node); | |
1419 | if (!content) { | |
1420 | ret = -LTTNG_ERR_NOMEM; | |
1421 | goto end; | |
1422 | } | |
1423 | ||
1424 | ret = parse_uint(content, &addr); | |
1425 | free(content); | |
1426 | if (ret) { | |
1427 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1428 | goto end; | |
1429 | } | |
1430 | ||
1431 | attr->addr = addr; | |
1432 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1433 | config_element_offset)) { | |
1434 | xmlChar *content; | |
1435 | uint64_t offset = 0; | |
1436 | ||
1437 | /* offset */ | |
1438 | content = xmlNodeGetContent(probe_attribute_node); | |
1439 | if (!content) { | |
1440 | ret = -LTTNG_ERR_NOMEM; | |
1441 | goto end; | |
1442 | } | |
1443 | ||
1444 | ret = parse_uint(content, &offset); | |
1445 | free(content); | |
1446 | if (ret) { | |
1447 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1448 | goto end; | |
1449 | } | |
1450 | ||
1451 | attr->offset = offset; | |
1452 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1453 | config_element_symbol_name)) { | |
1454 | xmlChar *content; | |
1455 | size_t name_len; | |
1456 | ||
1457 | /* symbol_name */ | |
1458 | content = xmlNodeGetContent(probe_attribute_node); | |
1459 | if (!content) { | |
1460 | ret = -LTTNG_ERR_NOMEM; | |
1461 | goto end; | |
1462 | } | |
1463 | ||
1464 | name_len = strlen((char *) content); | |
1465 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1466 | WARN("symbol_name too long."); | |
1467 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1468 | free(content); | |
1469 | goto end; | |
1470 | } | |
1471 | ||
1472 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1473 | free(content); | |
1474 | } | |
1475 | ret = 0; | |
1476 | end: | |
1477 | return ret; | |
1478 | } | |
1479 | ||
1480 | static | |
1481 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
d7b645e2 | 1482 | const char *channel_name, const enum process_event_node_phase phase) |
dcf266c0 | 1483 | { |
d7b645e2 | 1484 | int ret = 0, i; |
dcf266c0 JG |
1485 | xmlNodePtr node; |
1486 | struct lttng_event event; | |
1487 | char **exclusions = NULL; | |
1488 | unsigned long exclusion_count = 0; | |
1489 | char *filter_expression = NULL; | |
1490 | ||
1491 | assert(event_node); | |
1492 | assert(handle); | |
1493 | assert(channel_name); | |
1494 | ||
1495 | memset(&event, 0, sizeof(event)); | |
1496 | ||
f40eba3d JG |
1497 | /* Initialize default log level which varies by domain */ |
1498 | switch (handle->domain.type) | |
1499 | { | |
1500 | case LTTNG_DOMAIN_JUL: | |
1501 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; | |
1502 | break; | |
1503 | case LTTNG_DOMAIN_LOG4J: | |
1504 | event.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; | |
1505 | break; | |
1506 | case LTTNG_DOMAIN_PYTHON: | |
1507 | event.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; | |
1508 | break; | |
1509 | case LTTNG_DOMAIN_UST: | |
1510 | case LTTNG_DOMAIN_KERNEL: | |
1511 | event.loglevel = LTTNG_LOGLEVEL_DEBUG; | |
1512 | break; | |
1513 | default: | |
1514 | assert(0); | |
1515 | } | |
1516 | ||
dcf266c0 JG |
1517 | for (node = xmlFirstElementChild(event_node); node; |
1518 | node = xmlNextElementSibling(node)) { | |
1519 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1520 | xmlChar *content; | |
1521 | size_t name_len; | |
1522 | ||
1523 | /* name */ | |
1524 | content = xmlNodeGetContent(node); | |
1525 | if (!content) { | |
1526 | ret = -LTTNG_ERR_NOMEM; | |
1527 | goto end; | |
1528 | } | |
1529 | ||
1530 | name_len = strlen((char *) content); | |
1531 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1532 | WARN("Channel name too long."); | |
1533 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1534 | free(content); | |
1535 | goto end; | |
1536 | } | |
1537 | ||
1538 | strncpy(event.name, (const char *) content, name_len); | |
1539 | free(content); | |
1540 | } else if (!strcmp((const char *) node->name, | |
1541 | config_element_enabled)) { | |
1542 | xmlChar *content = xmlNodeGetContent(node); | |
1543 | ||
1544 | /* enabled */ | |
1545 | if (!content) { | |
1546 | ret = -LTTNG_ERR_NOMEM; | |
1547 | goto end; | |
1548 | } | |
1549 | ||
1550 | ret = parse_bool(content, &event.enabled); | |
1551 | free(content); | |
1552 | if (ret) { | |
1553 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1554 | goto end; | |
1555 | } | |
1556 | } else if (!strcmp((const char *) node->name, | |
1557 | config_element_type)) { | |
1558 | xmlChar *content = xmlNodeGetContent(node); | |
1559 | ||
1560 | /* type */ | |
1561 | if (!content) { | |
1562 | ret = -LTTNG_ERR_NOMEM; | |
1563 | goto end; | |
1564 | } | |
1565 | ||
1566 | ret = get_event_type(content); | |
1567 | free(content); | |
1568 | if (ret < 0) { | |
1569 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1570 | goto end; | |
1571 | } | |
1572 | ||
1573 | event.type = ret; | |
1574 | } else if (!strcmp((const char *) node->name, | |
1575 | config_element_loglevel_type)) { | |
1576 | xmlChar *content = xmlNodeGetContent(node); | |
1577 | ||
1578 | /* loglevel_type */ | |
1579 | if (!content) { | |
1580 | ret = -LTTNG_ERR_NOMEM; | |
1581 | goto end; | |
1582 | } | |
1583 | ||
1584 | ret = get_loglevel_type(content); | |
1585 | free(content); | |
1586 | if (ret < 0) { | |
1587 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1588 | goto end; | |
1589 | } | |
1590 | ||
1591 | event.loglevel_type = ret; | |
1592 | } else if (!strcmp((const char *) node->name, | |
1593 | config_element_loglevel)) { | |
1594 | xmlChar *content; | |
1595 | int64_t loglevel = 0; | |
1596 | ||
1597 | /* loglevel */ | |
1598 | content = xmlNodeGetContent(node); | |
1599 | if (!content) { | |
1600 | ret = -LTTNG_ERR_NOMEM; | |
1601 | goto end; | |
1602 | } | |
1603 | ||
1604 | ret = parse_int(content, &loglevel); | |
1605 | free(content); | |
1606 | if (ret) { | |
1607 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1608 | goto end; | |
1609 | } | |
1610 | ||
1611 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1612 | WARN("loglevel out of range."); | |
1613 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1614 | goto end; | |
1615 | } | |
1616 | ||
1617 | event.loglevel = loglevel; | |
1618 | } else if (!strcmp((const char *) node->name, | |
1619 | config_element_filter)) { | |
1620 | xmlChar *content = | |
1621 | xmlNodeGetContent(node); | |
1622 | ||
1623 | /* filter */ | |
1624 | if (!content) { | |
1625 | ret = -LTTNG_ERR_NOMEM; | |
1626 | goto end; | |
1627 | } | |
1628 | ||
02d8ac3d | 1629 | free(filter_expression); |
dcf266c0 JG |
1630 | filter_expression = strdup((char *) content); |
1631 | free(content); | |
1632 | if (!filter_expression) { | |
1633 | ret = -LTTNG_ERR_NOMEM; | |
1634 | goto end; | |
1635 | } | |
1636 | } else if (!strcmp((const char *) node->name, | |
1637 | config_element_exclusions)) { | |
1638 | xmlNodePtr exclusion_node; | |
1639 | int exclusion_index = 0; | |
1640 | ||
1641 | /* exclusions */ | |
1642 | if (exclusions) { | |
1643 | /* | |
1644 | * Exclusions has already been initialized, | |
1645 | * invalid file. | |
1646 | */ | |
1647 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1648 | goto end; | |
1649 | } | |
1650 | ||
1651 | exclusion_count = xmlChildElementCount(node); | |
1652 | if (!exclusion_count) { | |
1653 | continue; | |
1654 | } | |
1655 | ||
1656 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1657 | if (!exclusions) { | |
1658 | exclusion_count = 0; | |
1659 | ret = -LTTNG_ERR_NOMEM; | |
1660 | goto end; | |
1661 | } | |
1662 | ||
1663 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1664 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1665 | xmlChar *content = | |
1666 | xmlNodeGetContent(exclusion_node); | |
1667 | ||
1668 | if (!content) { | |
1669 | ret = -LTTNG_ERR_NOMEM; | |
1670 | goto end; | |
1671 | } | |
1672 | ||
1673 | exclusions[exclusion_index] = strdup((const char *) content); | |
1674 | free(content); | |
1675 | if (!exclusions[exclusion_index]) { | |
1676 | ret = -LTTNG_ERR_NOMEM; | |
1677 | goto end; | |
1678 | } | |
1679 | exclusion_index++; | |
1680 | } | |
1681 | ||
1682 | event.exclusion = 1; | |
1683 | } else if (!strcmp((const char *) node->name, | |
1684 | config_element_attributes)) { | |
1685 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1686 | ||
1687 | /* attributes */ | |
1688 | if (!attribute_node) { | |
1689 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1690 | goto end; | |
1691 | } | |
1692 | ||
1693 | if (!strcmp((const char *) node->name, | |
1694 | config_element_probe_attributes)) { | |
1695 | xmlNodePtr probe_attribute_node; | |
1696 | ||
1697 | /* probe_attributes */ | |
1698 | for (probe_attribute_node = | |
1699 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1700 | probe_attribute_node = xmlNextElementSibling( | |
1701 | probe_attribute_node)) { | |
1702 | ||
1703 | ret = process_probe_attribute_node(probe_attribute_node, | |
1704 | &event.attr.probe); | |
1705 | if (ret) { | |
1706 | goto end; | |
1707 | } | |
1708 | } | |
1709 | } else { | |
1710 | size_t sym_len; | |
1711 | xmlChar *content; | |
1712 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1713 | ||
1714 | /* function_attributes */ | |
1715 | content = xmlNodeGetContent(symbol_node); | |
1716 | if (!content) { | |
1717 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1718 | goto end; | |
1719 | } | |
1720 | ||
1721 | sym_len = strlen((char *) content); | |
1722 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1723 | WARN("Function name too long."); | |
1724 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1725 | free(content); | |
1726 | goto end; | |
1727 | } | |
1728 | ||
1729 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1730 | sym_len); | |
1731 | free(content); | |
1732 | } | |
1733 | } | |
1734 | } | |
1735 | ||
d7b645e2 JR |
1736 | if ((event.enabled && phase == ENABLE) || phase == CREATION) { |
1737 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1738 | filter_expression, exclusion_count, exclusions); | |
1739 | if (ret < 0) { | |
1740 | WARN("Enabling event (name:%s) on load failed.", event.name); | |
1741 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1742 | goto end; | |
1743 | } | |
065321e9 | 1744 | } |
dcf266c0 JG |
1745 | end: |
1746 | for (i = 0; i < exclusion_count; i++) { | |
1747 | free(exclusions[i]); | |
1748 | } | |
1749 | ||
1750 | free(exclusions); | |
1751 | free(filter_expression); | |
1752 | return ret; | |
1753 | } | |
1754 | ||
1755 | static | |
1756 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1757 | const char *channel_name) | |
1758 | { | |
1759 | int ret = 0; | |
d7b645e2 | 1760 | struct lttng_event event; |
dcf266c0 JG |
1761 | xmlNodePtr node; |
1762 | ||
1763 | assert(events_node); | |
1764 | assert(handle); | |
1765 | assert(channel_name); | |
1766 | ||
1767 | for (node = xmlFirstElementChild(events_node); node; | |
1768 | node = xmlNextElementSibling(node)) { | |
d7b645e2 | 1769 | ret = process_event_node(node, handle, channel_name, CREATION); |
dcf266c0 JG |
1770 | if (ret) { |
1771 | goto end; | |
1772 | } | |
1773 | } | |
d7b645e2 JR |
1774 | |
1775 | /* | |
1776 | * Disable all events to enable only the necessary events. | |
1777 | * Limitations regarding lttng_disable_events and tuple descriptor | |
1778 | * force this approach. | |
1779 | */ | |
1780 | memset(&event, 0, sizeof(event)); | |
1781 | event.loglevel = -1; | |
1782 | event.type = LTTNG_EVENT_ALL; | |
1783 | ret = lttng_disable_event_ext(handle, &event, channel_name, NULL); | |
1784 | if (ret) { | |
1785 | goto end; | |
1786 | } | |
1787 | ||
1788 | for (node = xmlFirstElementChild(events_node); node; | |
1789 | node = xmlNextElementSibling(node)) { | |
1790 | ret = process_event_node(node, handle, channel_name, ENABLE); | |
1791 | if (ret) { | |
1792 | goto end; | |
1793 | } | |
1794 | } | |
1795 | ||
dcf266c0 JG |
1796 | end: |
1797 | return ret; | |
1798 | } | |
1799 | ||
1800 | static | |
1801 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1802 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1803 | xmlNodePtr *events_node) | |
1804 | { | |
1805 | int ret; | |
1806 | ||
1807 | assert(attr_node); | |
1808 | assert(channel); | |
1809 | assert(contexts_node); | |
1810 | assert(events_node); | |
1811 | ||
1812 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1813 | xmlChar *content; | |
1814 | size_t name_len; | |
1815 | ||
1816 | /* name */ | |
1817 | content = xmlNodeGetContent(attr_node); | |
1818 | if (!content) { | |
1819 | ret = -LTTNG_ERR_NOMEM; | |
1820 | goto end; | |
1821 | } | |
1822 | ||
1823 | name_len = strlen((char *) content); | |
1824 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1825 | WARN("Channel name too long."); | |
1826 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1827 | free(content); | |
1828 | goto end; | |
1829 | } | |
1830 | ||
1831 | strncpy(channel->name, (const char *) content, name_len); | |
1832 | free(content); | |
1833 | } else if (!strcmp((const char *) attr_node->name, | |
1834 | config_element_enabled)) { | |
1835 | xmlChar *content; | |
1836 | int enabled; | |
1837 | ||
1838 | /* enabled */ | |
1839 | content = xmlNodeGetContent(attr_node); | |
1840 | if (!content) { | |
1841 | ret = -LTTNG_ERR_NOMEM; | |
1842 | goto end; | |
1843 | } | |
1844 | ||
1845 | ret = parse_bool(content, &enabled); | |
1846 | free(content); | |
1847 | if (ret) { | |
1848 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1849 | goto end; | |
1850 | } | |
1851 | ||
1852 | channel->enabled = enabled; | |
1853 | } else if (!strcmp((const char *) attr_node->name, | |
1854 | config_element_overwrite_mode)) { | |
1855 | xmlChar *content; | |
1856 | ||
1857 | /* overwrite_mode */ | |
1858 | content = xmlNodeGetContent(attr_node); | |
1859 | if (!content) { | |
1860 | ret = -LTTNG_ERR_NOMEM; | |
1861 | goto end; | |
1862 | } | |
1863 | ||
1864 | ret = get_overwrite_mode(content); | |
1865 | free(content); | |
1866 | if (ret < 0) { | |
1867 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1868 | goto end; | |
1869 | } | |
1870 | ||
1871 | channel->attr.overwrite = ret; | |
1872 | } else if (!strcmp((const char *) attr_node->name, | |
1873 | config_element_subbuf_size)) { | |
1874 | xmlChar *content; | |
1875 | ||
1876 | /* subbuffer_size */ | |
1877 | content = xmlNodeGetContent(attr_node); | |
1878 | if (!content) { | |
1879 | ret = -LTTNG_ERR_NOMEM; | |
1880 | goto end; | |
1881 | } | |
1882 | ||
1883 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1884 | free(content); | |
1885 | if (ret) { | |
1886 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1887 | goto end; | |
1888 | } | |
1889 | } else if (!strcmp((const char *) attr_node->name, | |
1890 | config_element_num_subbuf)) { | |
1891 | xmlChar *content; | |
1892 | ||
1893 | /* subbuffer_count */ | |
1894 | content = xmlNodeGetContent(attr_node); | |
1895 | if (!content) { | |
1896 | ret = -LTTNG_ERR_NOMEM; | |
1897 | goto end; | |
1898 | } | |
1899 | ||
1900 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1901 | free(content); | |
1902 | if (ret) { | |
1903 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1904 | goto end; | |
1905 | } | |
1906 | } else if (!strcmp((const char *) attr_node->name, | |
1907 | config_element_switch_timer_interval)) { | |
1908 | xmlChar *content; | |
1909 | uint64_t switch_timer_interval = 0; | |
1910 | ||
1911 | /* switch_timer_interval */ | |
1912 | content = xmlNodeGetContent(attr_node); | |
1913 | if (!content) { | |
1914 | ret = -LTTNG_ERR_NOMEM; | |
1915 | goto end; | |
1916 | } | |
1917 | ||
1918 | ret = parse_uint(content, &switch_timer_interval); | |
1919 | free(content); | |
1920 | if (ret) { | |
1921 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1922 | goto end; | |
1923 | } | |
1924 | ||
1925 | if (switch_timer_interval > UINT_MAX) { | |
1926 | WARN("switch_timer_interval out of range."); | |
1927 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1928 | goto end; | |
1929 | } | |
1930 | ||
1931 | channel->attr.switch_timer_interval = | |
1932 | switch_timer_interval; | |
1933 | } else if (!strcmp((const char *) attr_node->name, | |
1934 | config_element_read_timer_interval)) { | |
1935 | xmlChar *content; | |
1936 | uint64_t read_timer_interval = 0; | |
1937 | ||
1938 | /* read_timer_interval */ | |
1939 | content = xmlNodeGetContent(attr_node); | |
1940 | if (!content) { | |
1941 | ret = -LTTNG_ERR_NOMEM; | |
1942 | goto end; | |
1943 | } | |
1944 | ||
1945 | ret = parse_uint(content, &read_timer_interval); | |
1946 | free(content); | |
1947 | if (ret) { | |
1948 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1949 | goto end; | |
1950 | } | |
1951 | ||
1952 | if (read_timer_interval > UINT_MAX) { | |
1953 | WARN("read_timer_interval out of range."); | |
1954 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1955 | goto end; | |
1956 | } | |
1957 | ||
1958 | channel->attr.read_timer_interval = | |
1959 | read_timer_interval; | |
1960 | } else if (!strcmp((const char *) attr_node->name, | |
1961 | config_element_output_type)) { | |
1962 | xmlChar *content; | |
1963 | ||
1964 | /* output_type */ | |
1965 | content = xmlNodeGetContent(attr_node); | |
1966 | if (!content) { | |
1967 | ret = -LTTNG_ERR_NOMEM; | |
1968 | goto end; | |
1969 | } | |
1970 | ||
1971 | ret = get_output_type(content); | |
1972 | free(content); | |
1973 | if (ret < 0) { | |
1974 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1975 | goto end; | |
1976 | } | |
1977 | ||
1978 | channel->attr.output = ret; | |
1979 | } else if (!strcmp((const char *) attr_node->name, | |
1980 | config_element_tracefile_size)) { | |
1981 | xmlChar *content; | |
1982 | ||
1983 | /* tracefile_size */ | |
1984 | content = xmlNodeGetContent(attr_node); | |
1985 | if (!content) { | |
1986 | ret = -LTTNG_ERR_NOMEM; | |
1987 | goto end; | |
1988 | } | |
1989 | ||
1990 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
1991 | free(content); | |
1992 | if (ret) { | |
1993 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1994 | goto end; | |
1995 | } | |
1996 | } else if (!strcmp((const char *) attr_node->name, | |
1997 | config_element_tracefile_count)) { | |
1998 | xmlChar *content; | |
1999 | ||
2000 | /* tracefile_count */ | |
2001 | content = xmlNodeGetContent(attr_node); | |
2002 | if (!content) { | |
2003 | ret = -LTTNG_ERR_NOMEM; | |
2004 | goto end; | |
2005 | } | |
2006 | ||
2007 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
2008 | free(content); | |
2009 | if (ret) { | |
2010 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2011 | goto end; | |
2012 | } | |
2013 | } else if (!strcmp((const char *) attr_node->name, | |
2014 | config_element_live_timer_interval)) { | |
2015 | xmlChar *content; | |
2016 | uint64_t live_timer_interval = 0; | |
2017 | ||
2018 | /* live_timer_interval */ | |
2019 | content = xmlNodeGetContent(attr_node); | |
2020 | if (!content) { | |
2021 | ret = -LTTNG_ERR_NOMEM; | |
2022 | goto end; | |
2023 | } | |
2024 | ||
2025 | ret = parse_uint(content, &live_timer_interval); | |
2026 | free(content); | |
2027 | if (ret) { | |
2028 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2029 | goto end; | |
2030 | } | |
2031 | ||
2032 | if (live_timer_interval > UINT_MAX) { | |
2033 | WARN("live_timer_interval out of range."); | |
2034 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2035 | goto end; | |
2036 | } | |
2037 | ||
2038 | channel->attr.live_timer_interval = | |
2039 | live_timer_interval; | |
2040 | } else if (!strcmp((const char *) attr_node->name, | |
2041 | config_element_events)) { | |
2042 | /* events */ | |
2043 | *events_node = attr_node; | |
2044 | } else { | |
2045 | /* contexts */ | |
2046 | *contexts_node = attr_node; | |
2047 | } | |
2048 | ret = 0; | |
2049 | end: | |
2050 | return ret; | |
2051 | } | |
2052 | ||
2053 | static | |
2054 | int process_context_node(xmlNodePtr context_node, | |
2055 | struct lttng_handle *handle, const char *channel_name) | |
2056 | { | |
2057 | int ret; | |
2058 | struct lttng_event_context context; | |
2059 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
2060 | ||
2061 | assert(handle); | |
2062 | assert(channel_name); | |
2063 | ||
2064 | if (!context_child_node) { | |
2065 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2066 | goto end; | |
2067 | } | |
2068 | ||
2069 | memset(&context, 0, sizeof(context)); | |
2070 | ||
2071 | if (!strcmp((const char *) context_child_node->name, | |
2072 | config_element_type)) { | |
2073 | /* type */ | |
2074 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
045fc617 | 2075 | |
dcf266c0 JG |
2076 | if (!content) { |
2077 | ret = -LTTNG_ERR_NOMEM; | |
2078 | goto end; | |
2079 | } | |
2080 | ||
2081 | ret = get_context_type(content); | |
2082 | free(content); | |
2083 | if (ret < 0) { | |
2084 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2085 | goto end; | |
2086 | } | |
2087 | ||
2088 | context.ctx = ret; | |
045fc617 JG |
2089 | } else if (!strcmp((const char *) context_child_node->name, |
2090 | config_element_context_perf)) { | |
2091 | /* perf */ | |
dcf266c0 JG |
2092 | xmlNodePtr perf_attr_node; |
2093 | ||
14ce5bd8 JG |
2094 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
2095 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
2096 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
2097 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
2098 | perf_attr_node; perf_attr_node = | |
2099 | xmlNextElementSibling(perf_attr_node)) { | |
2100 | if (!strcmp((const char *) perf_attr_node->name, | |
2101 | config_element_type)) { | |
2102 | xmlChar *content; | |
2103 | uint64_t type = 0; | |
2104 | ||
2105 | /* type */ | |
2106 | content = xmlNodeGetContent(perf_attr_node); | |
2107 | if (!content) { | |
2108 | ret = -LTTNG_ERR_NOMEM; | |
2109 | goto end; | |
2110 | } | |
2111 | ||
2112 | ret = parse_uint(content, &type); | |
2113 | free(content); | |
2114 | if (ret) { | |
2115 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2116 | goto end; | |
2117 | } | |
2118 | ||
2119 | if (type > UINT32_MAX) { | |
2120 | WARN("perf context type out of range."); | |
2121 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2122 | goto end; | |
2123 | } | |
2124 | ||
2125 | context.u.perf_counter.type = type; | |
2126 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2127 | config_element_config)) { | |
2128 | xmlChar *content; | |
2129 | uint64_t config = 0; | |
2130 | ||
2131 | /* config */ | |
2132 | content = xmlNodeGetContent(perf_attr_node); | |
2133 | if (!content) { | |
2134 | ret = -LTTNG_ERR_NOMEM; | |
2135 | goto end; | |
2136 | } | |
2137 | ||
2138 | ret = parse_uint(content, &config); | |
2139 | free(content); | |
2140 | if (ret) { | |
2141 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2142 | goto end; | |
2143 | } | |
2144 | ||
2145 | context.u.perf_counter.config = config; | |
2146 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2147 | config_element_name)) { | |
2148 | xmlChar *content; | |
2149 | size_t name_len; | |
2150 | ||
2151 | /* name */ | |
2152 | content = xmlNodeGetContent(perf_attr_node); | |
2153 | if (!content) { | |
2154 | ret = -LTTNG_ERR_NOMEM; | |
2155 | goto end; | |
2156 | } | |
2157 | ||
2158 | name_len = strlen((char *) content); | |
2159 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2160 | WARN("perf context name too long."); | |
2161 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2162 | free(content); | |
2163 | goto end; | |
2164 | } | |
2165 | ||
2166 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2167 | name_len); | |
2168 | free(content); | |
2169 | } | |
2170 | } | |
045fc617 JG |
2171 | } else if (!strcmp((const char *) context_child_node->name, |
2172 | config_element_context_app)) { | |
2173 | /* application context */ | |
2174 | xmlNodePtr app_ctx_node; | |
2175 | ||
2176 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
2177 | for (app_ctx_node = xmlFirstElementChild(context_child_node); | |
2178 | app_ctx_node; app_ctx_node = | |
2179 | xmlNextElementSibling(app_ctx_node)) { | |
2180 | xmlChar *content; | |
2181 | char **target = strcmp( | |
2182 | (const char *) app_ctx_node->name, | |
2183 | config_element_context_app_provider_name) == 0 ? | |
2184 | &context.u.app_ctx.provider_name : | |
2185 | &context.u.app_ctx.ctx_name; | |
2186 | ||
2187 | content = xmlNodeGetContent(app_ctx_node); | |
2188 | if (!content) { | |
2189 | ret = -LTTNG_ERR_NOMEM; | |
2190 | goto end; | |
2191 | } | |
2192 | ||
2193 | *target = (char *) content; | |
2194 | } | |
2195 | } else { | |
2196 | /* Unrecognized context type */ | |
2197 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2198 | goto end; | |
dcf266c0 JG |
2199 | } |
2200 | ||
2201 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
045fc617 JG |
2202 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2203 | free(context.u.app_ctx.provider_name); | |
2204 | free(context.u.app_ctx.ctx_name); | |
2205 | } | |
dcf266c0 JG |
2206 | end: |
2207 | return ret; | |
2208 | } | |
2209 | ||
2210 | static | |
2211 | int process_contexts_node(xmlNodePtr contexts_node, | |
2212 | struct lttng_handle *handle, const char *channel_name) | |
2213 | { | |
2214 | int ret = 0; | |
2215 | xmlNodePtr context_node; | |
2216 | ||
2217 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2218 | context_node = xmlNextElementSibling(context_node)) { | |
2219 | ret = process_context_node(context_node, handle, channel_name); | |
2220 | if (ret) { | |
2221 | goto end; | |
2222 | } | |
2223 | } | |
2224 | end: | |
2225 | return ret; | |
2226 | } | |
2227 | ||
847a5916 JR |
2228 | static |
2229 | int process_pid_tracker_node(xmlNodePtr pid_tracker_node, | |
2230 | struct lttng_handle *handle) | |
2231 | { | |
dd49e13f | 2232 | int ret = 0, child; |
847a5916 JR |
2233 | xmlNodePtr targets_node = NULL; |
2234 | xmlNodePtr node; | |
2235 | ||
2236 | assert(handle); | |
2237 | assert(pid_tracker_node); | |
2238 | /* get the targets node */ | |
2239 | for (node = xmlFirstElementChild(pid_tracker_node); node; | |
2240 | node = xmlNextElementSibling(node)) { | |
2241 | if (!strcmp((const char *) node->name, | |
2242 | config_element_targets)) { | |
2243 | targets_node = node; | |
2244 | break; | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | if (!targets_node) { | |
2249 | ret = LTTNG_ERR_INVALID; | |
2250 | goto end; | |
2251 | } | |
2252 | ||
2253 | /* Go through all pid_target node */ | |
2254 | child = xmlChildElementCount(targets_node); | |
2255 | if (child == 0) { | |
2256 | /* The session is explicitly set to target nothing. */ | |
2257 | ret = lttng_untrack_pid(handle, -1); | |
2258 | if (ret) { | |
2259 | goto end; | |
2260 | } | |
2261 | } | |
2262 | for (node = xmlFirstElementChild(targets_node); node; | |
2263 | node = xmlNextElementSibling(node)) { | |
2264 | xmlNodePtr pid_target_node = node; | |
2265 | ||
2266 | /* get pid node and track it */ | |
2267 | for (node = xmlFirstElementChild(pid_target_node); node; | |
2268 | node = xmlNextElementSibling(node)) { | |
2269 | if (!strcmp((const char *) node->name, | |
2270 | config_element_pid)) { | |
2271 | int64_t pid; | |
2272 | xmlChar *content = NULL; | |
2273 | ||
2274 | content = xmlNodeGetContent(node); | |
2275 | if (!content) { | |
2276 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2277 | goto end; | |
2278 | } | |
2279 | ||
2280 | ret = parse_int(content, &pid); | |
2281 | free(content); | |
2282 | if (ret) { | |
2283 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2284 | goto end; | |
2285 | } | |
2286 | ||
2287 | ret = lttng_track_pid(handle, (int) pid); | |
2288 | if (ret) { | |
2289 | goto end; | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | node = pid_target_node; | |
2294 | } | |
2295 | ||
2296 | end: | |
2297 | return ret; | |
2298 | } | |
2299 | ||
2300 | ||
dcf266c0 JG |
2301 | static |
2302 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2303 | { | |
2304 | int ret; | |
2305 | struct lttng_domain domain = { 0 }; | |
2306 | struct lttng_handle *handle = NULL; | |
2307 | xmlNodePtr channels_node = NULL; | |
847a5916 JR |
2308 | xmlNodePtr trackers_node = NULL; |
2309 | xmlNodePtr pid_tracker_node = NULL; | |
dcf266c0 JG |
2310 | xmlNodePtr node; |
2311 | ||
2312 | assert(session_name); | |
2313 | ||
2314 | ret = init_domain(domain_node, &domain); | |
2315 | if (ret) { | |
2316 | goto end; | |
2317 | } | |
2318 | ||
2319 | handle = lttng_create_handle(session_name, &domain); | |
2320 | if (!handle) { | |
2321 | ret = -LTTNG_ERR_NOMEM; | |
2322 | goto end; | |
2323 | } | |
2324 | ||
2325 | /* get the channels node */ | |
2326 | for (node = xmlFirstElementChild(domain_node); node; | |
2327 | node = xmlNextElementSibling(node)) { | |
2328 | if (!strcmp((const char *) node->name, | |
2329 | config_element_channels)) { | |
2330 | channels_node = node; | |
2331 | break; | |
2332 | } | |
2333 | } | |
2334 | ||
2335 | if (!channels_node) { | |
2336 | goto end; | |
2337 | } | |
2338 | ||
2339 | /* create all channels */ | |
2340 | for (node = xmlFirstElementChild(channels_node); node; | |
2341 | node = xmlNextElementSibling(node)) { | |
2342 | struct lttng_channel channel; | |
2343 | xmlNodePtr contexts_node = NULL; | |
2344 | xmlNodePtr events_node = NULL; | |
2345 | xmlNodePtr channel_attr_node; | |
2346 | ||
2347 | memset(&channel, 0, sizeof(channel)); | |
2348 | lttng_channel_set_default_attr(&domain, &channel.attr); | |
2349 | ||
2350 | for (channel_attr_node = xmlFirstElementChild(node); | |
2351 | channel_attr_node; channel_attr_node = | |
2352 | xmlNextElementSibling(channel_attr_node)) { | |
2353 | ret = process_channel_attr_node(channel_attr_node, | |
2354 | &channel, &contexts_node, &events_node); | |
2355 | if (ret) { | |
2356 | goto end; | |
2357 | } | |
2358 | } | |
2359 | ||
2360 | ret = lttng_enable_channel(handle, &channel); | |
2361 | if (ret < 0) { | |
2362 | goto end; | |
2363 | } | |
2364 | ||
2365 | ret = process_events_node(events_node, handle, channel.name); | |
2366 | if (ret) { | |
2367 | goto end; | |
2368 | } | |
2369 | ||
2370 | ret = process_contexts_node(contexts_node, handle, | |
2371 | channel.name); | |
2372 | if (ret) { | |
2373 | goto end; | |
2374 | } | |
2375 | } | |
847a5916 JR |
2376 | |
2377 | /* get the trackers node */ | |
2378 | for (node = xmlFirstElementChild(domain_node); node; | |
2379 | node = xmlNextElementSibling(node)) { | |
2380 | if (!strcmp((const char *) node->name, | |
2381 | config_element_trackers)) { | |
2382 | trackers_node = node; | |
2383 | break; | |
2384 | } | |
2385 | } | |
2386 | ||
2387 | if (!trackers_node) { | |
2388 | goto end; | |
2389 | } | |
2390 | ||
2391 | for (node = xmlFirstElementChild(trackers_node); node; | |
2392 | node = xmlNextElementSibling(node)) { | |
2393 | if (!strcmp((const char *)node->name,config_element_pid_tracker)) { | |
2394 | pid_tracker_node = node; | |
2395 | ret = process_pid_tracker_node(pid_tracker_node, handle); | |
2396 | if (ret) { | |
2397 | goto end; | |
2398 | } | |
2399 | } | |
2400 | } | |
2401 | ||
2402 | if (!pid_tracker_node) { | |
2403 | lttng_track_pid(handle, -1); | |
2404 | } | |
2405 | ||
dcf266c0 JG |
2406 | end: |
2407 | lttng_destroy_handle(handle); | |
2408 | return ret; | |
2409 | } | |
2410 | ||
2411 | static | |
2412 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
2413 | int override) | |
2414 | { | |
2415 | int ret, started = -1, snapshot_mode = -1; | |
2416 | uint64_t live_timer_interval = UINT64_MAX; | |
d324faf7 | 2417 | xmlChar *name = NULL; |
9e7c9f56 | 2418 | xmlChar *shm_path = NULL; |
dcf266c0 JG |
2419 | xmlNodePtr domains_node = NULL; |
2420 | xmlNodePtr output_node = NULL; | |
2421 | xmlNodePtr node; | |
2422 | struct lttng_domain *kernel_domain = NULL; | |
2423 | struct lttng_domain *ust_domain = NULL; | |
2424 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2425 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 2426 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
2427 | |
2428 | for (node = xmlFirstElementChild(session_node); node; | |
2429 | node = xmlNextElementSibling(node)) { | |
2430 | if (!name && !strcmp((const char *) node->name, | |
2431 | config_element_name)) { | |
2432 | /* name */ | |
2433 | xmlChar *node_content = xmlNodeGetContent(node); | |
2434 | if (!node_content) { | |
2435 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2436 | goto error; |
dcf266c0 JG |
2437 | } |
2438 | ||
d324faf7 | 2439 | name = node_content; |
dcf266c0 JG |
2440 | } else if (!domains_node && !strcmp((const char *) node->name, |
2441 | config_element_domains)) { | |
2442 | /* domains */ | |
2443 | domains_node = node; | |
2444 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2445 | config_element_started)) { | |
2446 | /* started */ | |
2447 | xmlChar *node_content = xmlNodeGetContent(node); | |
2448 | if (!node_content) { | |
2449 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2450 | goto error; |
dcf266c0 JG |
2451 | } |
2452 | ||
2453 | ret = parse_bool(node_content, &started); | |
2454 | free(node_content); | |
2455 | if (ret) { | |
2456 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2457 | goto error; |
dcf266c0 JG |
2458 | } |
2459 | } else if (!output_node && !strcmp((const char *) node->name, | |
2460 | config_element_output)) { | |
2461 | /* output */ | |
2462 | output_node = node; | |
9e7c9f56 JR |
2463 | } else if (!shm_path && !strcmp((const char *) node->name, |
2464 | config_element_shared_memory_path)) { | |
2465 | /* shared memory path */ | |
2466 | xmlChar *node_content = xmlNodeGetContent(node); | |
2467 | if (!node_content) { | |
2468 | ret = -LTTNG_ERR_NOMEM; | |
2469 | goto error; | |
2470 | } | |
2471 | ||
2472 | shm_path = node_content; | |
dcf266c0 JG |
2473 | } else { |
2474 | /* attributes, snapshot_mode or live_timer_interval */ | |
2475 | xmlNodePtr attributes_child = | |
2476 | xmlFirstElementChild(node); | |
2477 | ||
2478 | if (!strcmp((const char *) attributes_child->name, | |
2479 | config_element_snapshot_mode)) { | |
2480 | /* snapshot_mode */ | |
2481 | xmlChar *snapshot_mode_content = | |
2482 | xmlNodeGetContent(attributes_child); | |
2483 | if (!snapshot_mode_content) { | |
2484 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2485 | goto error; |
dcf266c0 JG |
2486 | } |
2487 | ||
2488 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2489 | free(snapshot_mode_content); | |
2490 | if (ret) { | |
2491 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2492 | goto error; |
dcf266c0 JG |
2493 | } |
2494 | } else { | |
2495 | /* live_timer_interval */ | |
2496 | xmlChar *timer_interval_content = | |
2497 | xmlNodeGetContent(attributes_child); | |
2498 | if (!timer_interval_content) { | |
2499 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2500 | goto error; |
dcf266c0 JG |
2501 | } |
2502 | ||
2503 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2504 | free(timer_interval_content); | |
2505 | if (ret) { | |
2506 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2507 | goto error; |
dcf266c0 JG |
2508 | } |
2509 | } | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | if (!name) { | |
2514 | /* Mandatory attribute, as defined in the session XSD */ | |
2515 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2516 | goto error; |
dcf266c0 JG |
2517 | } |
2518 | ||
d324faf7 | 2519 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 2520 | /* This is not the session we are looking for */ |
c2da8cde DG |
2521 | ret = -LTTNG_ERR_NO_SESSION; |
2522 | goto error; | |
dcf266c0 JG |
2523 | } |
2524 | ||
2525 | /* Init domains to create the session handles */ | |
2526 | for (node = xmlFirstElementChild(domains_node); node; | |
2527 | node = xmlNextElementSibling(node)) { | |
2528 | struct lttng_domain *domain; | |
2529 | ||
2530 | domain = zmalloc(sizeof(*domain)); | |
2531 | if (!domain) { | |
2532 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2533 | goto error; |
dcf266c0 JG |
2534 | } |
2535 | ||
2536 | ret = init_domain(node, domain); | |
2537 | if (ret) { | |
2538 | goto domain_init_error; | |
2539 | } | |
2540 | ||
2541 | switch (domain->type) { | |
2542 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2543 | if (kernel_domain) { |
2544 | /* Same domain seen twice, invalid! */ | |
2545 | goto domain_init_error; | |
2546 | } | |
dcf266c0 JG |
2547 | kernel_domain = domain; |
2548 | break; | |
2549 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2550 | if (ust_domain) { |
2551 | /* Same domain seen twice, invalid! */ | |
2552 | goto domain_init_error; | |
2553 | } | |
dcf266c0 JG |
2554 | ust_domain = domain; |
2555 | break; | |
2556 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2557 | if (jul_domain) { |
2558 | /* Same domain seen twice, invalid! */ | |
2559 | goto domain_init_error; | |
2560 | } | |
dcf266c0 JG |
2561 | jul_domain = domain; |
2562 | break; | |
5cdb6027 DG |
2563 | case LTTNG_DOMAIN_LOG4J: |
2564 | if (log4j_domain) { | |
2565 | /* Same domain seen twice, invalid! */ | |
2566 | goto domain_init_error; | |
2567 | } | |
2568 | log4j_domain = domain; | |
2569 | break; | |
0e115563 DG |
2570 | case LTTNG_DOMAIN_PYTHON: |
2571 | if (python_domain) { | |
2572 | /* Same domain seen twice, invalid! */ | |
2573 | goto domain_init_error; | |
2574 | } | |
2575 | python_domain = domain; | |
2576 | break; | |
dcf266c0 JG |
2577 | default: |
2578 | WARN("Invalid domain type"); | |
2579 | goto domain_init_error; | |
2580 | } | |
2581 | continue; | |
2582 | domain_init_error: | |
2583 | free(domain); | |
2584 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2585 | goto error; |
dcf266c0 JG |
2586 | } |
2587 | ||
2588 | if (override) { | |
2589 | /* Destroy session if it exists */ | |
d324faf7 | 2590 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
2591 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
2592 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2593 | goto error; |
dcf266c0 JG |
2594 | } |
2595 | } | |
2596 | ||
2597 | /* Create session type depending on output type */ | |
2598 | if (snapshot_mode && snapshot_mode != -1) { | |
d324faf7 | 2599 | ret = create_snapshot_session((const char *) name, output_node); |
dcf266c0 JG |
2600 | } else if (live_timer_interval && |
2601 | live_timer_interval != UINT64_MAX) { | |
d324faf7 JG |
2602 | ret = create_session((const char *) name, kernel_domain, |
2603 | ust_domain, jul_domain, log4j_domain, | |
2604 | output_node, live_timer_interval); | |
dcf266c0 JG |
2605 | } else { |
2606 | /* regular session */ | |
d324faf7 JG |
2607 | ret = create_session((const char *) name, kernel_domain, |
2608 | ust_domain, jul_domain, log4j_domain, | |
2609 | output_node, UINT64_MAX); | |
dcf266c0 | 2610 | } |
dcf266c0 | 2611 | if (ret) { |
c2da8cde | 2612 | goto error; |
dcf266c0 JG |
2613 | } |
2614 | ||
9e7c9f56 JR |
2615 | if (shm_path) { |
2616 | ret = lttng_set_session_shm_path((const char *) name, | |
d324faf7 | 2617 | (const char *) shm_path); |
9e7c9f56 JR |
2618 | if (ret) { |
2619 | goto error; | |
2620 | } | |
2621 | } | |
2622 | ||
dcf266c0 JG |
2623 | for (node = xmlFirstElementChild(domains_node); node; |
2624 | node = xmlNextElementSibling(node)) { | |
d324faf7 | 2625 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
2626 | if (ret) { |
2627 | goto end; | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | if (started) { | |
d324faf7 | 2632 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
2633 | if (ret) { |
2634 | goto end; | |
2635 | } | |
2636 | } | |
c2da8cde | 2637 | |
dcf266c0 | 2638 | end: |
b2579dc1 | 2639 | if (ret < 0) { |
d324faf7 JG |
2640 | ERR("Failed to load session %s: %s", (const char *) name, |
2641 | lttng_strerror(ret)); | |
2642 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
2643 | } |
2644 | ||
c2da8cde | 2645 | error: |
dcf266c0 JG |
2646 | free(kernel_domain); |
2647 | free(ust_domain); | |
2648 | free(jul_domain); | |
5cdb6027 | 2649 | free(log4j_domain); |
135a3893 | 2650 | free(python_domain); |
d324faf7 | 2651 | xmlFree(name); |
9e7c9f56 | 2652 | xmlFree(shm_path); |
dcf266c0 JG |
2653 | return ret; |
2654 | } | |
2655 | ||
cf53c06d DG |
2656 | /* |
2657 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2658 | * Return -1 if the path is EPERM. | |
2659 | */ | |
2660 | static int validate_file_read_creds(const char *path) | |
2661 | { | |
2662 | int ret; | |
2663 | ||
2664 | assert(path); | |
2665 | ||
2666 | /* Can we read the file. */ | |
2667 | ret = access(path, R_OK); | |
2668 | if (!ret) { | |
2669 | goto valid; | |
2670 | } | |
2671 | if (errno == EACCES) { | |
2672 | return -1; | |
2673 | } else { | |
2674 | /* Invalid. */ | |
2675 | return 0; | |
2676 | } | |
2677 | valid: | |
2678 | return 1; | |
2679 | } | |
2680 | ||
dcf266c0 JG |
2681 | static |
2682 | int load_session_from_file(const char *path, const char *session_name, | |
2683 | struct session_config_validation_ctx *validation_ctx, int override) | |
2684 | { | |
2685 | int ret, session_found = !session_name; | |
2686 | xmlDocPtr doc = NULL; | |
2687 | xmlNodePtr sessions_node; | |
2688 | xmlNodePtr session_node; | |
dcf266c0 JG |
2689 | |
2690 | assert(path); | |
2691 | assert(validation_ctx); | |
2692 | ||
cf53c06d DG |
2693 | ret = validate_file_read_creds(path); |
2694 | if (ret != 1) { | |
2695 | if (ret == -1) { | |
2696 | ret = -LTTNG_ERR_EPERM; | |
2697 | } else { | |
2698 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2699 | } | |
dcf266c0 JG |
2700 | goto end; |
2701 | } | |
2702 | ||
2703 | doc = xmlParseFile(path); | |
2704 | if (!doc) { | |
2705 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2706 | goto end; | |
2707 | } | |
2708 | ||
2709 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2710 | if (ret) { | |
2711 | ERR("Session configuration file validation failed"); | |
2712 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2713 | goto end; | |
2714 | } | |
2715 | ||
2716 | sessions_node = xmlDocGetRootElement(doc); | |
2717 | if (!sessions_node) { | |
2718 | goto end; | |
2719 | } | |
2720 | ||
2721 | for (session_node = xmlFirstElementChild(sessions_node); | |
2722 | session_node; session_node = | |
2723 | xmlNextElementSibling(session_node)) { | |
2724 | ret = process_session_node(session_node, | |
2725 | session_name, override); | |
2726 | if (session_name && ret == 0) { | |
2727 | /* Target session found and loaded */ | |
2728 | session_found = 1; | |
2729 | break; | |
2730 | } | |
2731 | } | |
2732 | end: | |
2733 | xmlFreeDoc(doc); | |
2734 | if (!ret) { | |
a96bc65d | 2735 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2736 | } |
2737 | return ret; | |
2738 | } | |
2739 | ||
fa8b52a2 JR |
2740 | static |
2741 | int load_session_from_document(struct config_document *document, const char *session_name, | |
2742 | struct session_config_validation_ctx *validation_ctx, int override) | |
2743 | { | |
2744 | int ret, session_found = !session_name; | |
2745 | xmlNodePtr sessions_node; | |
2746 | xmlNodePtr session_node; | |
2747 | ||
2748 | assert(validation_ctx); | |
2749 | ||
2750 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, document->document); | |
2751 | if (ret) { | |
2752 | ERR("Session configuration file validation failed"); | |
2753 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2754 | goto end; | |
2755 | } | |
2756 | ||
2757 | sessions_node = xmlDocGetRootElement(document->document); | |
2758 | if (!sessions_node) { | |
2759 | goto end; | |
2760 | } | |
2761 | ||
2762 | for (session_node = xmlFirstElementChild(sessions_node); | |
2763 | session_node; session_node = | |
2764 | xmlNextElementSibling(session_node)) { | |
2765 | ret = process_session_node(session_node, | |
2766 | session_name, override); | |
2767 | if (session_name && ret == 0) { | |
2768 | /* Target session found and loaded */ | |
2769 | session_found = 1; | |
2770 | break; | |
2771 | } | |
2772 | } | |
2773 | end: | |
2774 | if (!ret) { | |
2775 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2776 | } | |
2777 | return ret; | |
2778 | } | |
2779 | ||
60f70355 JG |
2780 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
2781 | static | |
2782 | struct dirent *alloc_dirent(const char *path) | |
2783 | { | |
2784 | size_t len; | |
2785 | long name_max; | |
2786 | struct dirent *entry; | |
2787 | ||
2788 | name_max = pathconf(path, _PC_NAME_MAX); | |
2789 | if (name_max == -1) { | |
2790 | name_max = PATH_MAX; | |
2791 | } | |
2792 | len = offsetof(struct dirent, d_name) + name_max + 1; | |
2793 | entry = zmalloc(len); | |
2794 | return entry; | |
2795 | } | |
2796 | ||
dcf266c0 JG |
2797 | static |
2798 | int load_session_from_path(const char *path, const char *session_name, | |
2799 | struct session_config_validation_ctx *validation_ctx, int override) | |
2800 | { | |
2801 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2802 | DIR *directory = NULL; |
2803 | ||
2804 | assert(path); | |
2805 | assert(validation_ctx); | |
2806 | ||
4af16958 DG |
2807 | directory = opendir(path); |
2808 | if (!directory) { | |
11143783 DG |
2809 | switch (errno) { |
2810 | case ENOTDIR: | |
0f0a81b5 DG |
2811 | /* Try the file loading. */ |
2812 | break; | |
11143783 DG |
2813 | case ENOENT: |
2814 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2815 | goto end; | |
2816 | default: | |
0f0a81b5 DG |
2817 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2818 | goto end; | |
4af16958 | 2819 | } |
dcf266c0 | 2820 | } |
4af16958 | 2821 | if (directory) { |
dcf266c0 JG |
2822 | struct dirent *entry; |
2823 | struct dirent *result; | |
2824 | char *file_path = NULL; | |
2825 | size_t path_len = strlen(path); | |
2826 | ||
2827 | if (path_len >= PATH_MAX) { | |
2828 | ret = -LTTNG_ERR_INVALID; | |
2829 | goto end; | |
2830 | } | |
2831 | ||
60f70355 | 2832 | entry = alloc_dirent(path); |
dcf266c0 JG |
2833 | if (!entry) { |
2834 | ret = -LTTNG_ERR_NOMEM; | |
2835 | goto end; | |
2836 | } | |
2837 | ||
dcf266c0 JG |
2838 | file_path = zmalloc(PATH_MAX); |
2839 | if (!file_path) { | |
2840 | ret = -LTTNG_ERR_NOMEM; | |
2841 | free(entry); | |
2842 | goto end; | |
2843 | } | |
2844 | ||
2845 | strncpy(file_path, path, path_len); | |
2846 | if (file_path[path_len - 1] != '/') { | |
2847 | file_path[path_len++] = '/'; | |
2848 | } | |
2849 | ||
4af16958 | 2850 | ret = 0; |
dcf266c0 JG |
2851 | /* Search for *.lttng files */ |
2852 | while (!readdir_r(directory, entry, &result) && result) { | |
2853 | size_t file_name_len = strlen(result->d_name); | |
2854 | ||
2855 | if (file_name_len <= | |
2856 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2857 | continue; | |
2858 | } | |
2859 | ||
431f702e | 2860 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2861 | continue; |
2862 | } | |
2863 | ||
2864 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2865 | result->d_name + file_name_len - sizeof( | |
2866 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2867 | continue; | |
2868 | } | |
2869 | ||
2870 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2871 | file_path[path_len + file_name_len] = '\0'; | |
2872 | ||
2873 | ret = load_session_from_file(file_path, session_name, | |
2874 | validation_ctx, override); | |
2875 | if (session_name && !ret) { | |
2876 | session_found = 1; | |
2877 | break; | |
2878 | } | |
2879 | } | |
2880 | ||
2881 | free(entry); | |
2882 | free(file_path); | |
2883 | } else { | |
2884 | ret = load_session_from_file(path, session_name, | |
2885 | validation_ctx, override); | |
2886 | if (ret) { | |
2887 | goto end; | |
2888 | } else { | |
2889 | session_found = 1; | |
2890 | } | |
2891 | } | |
2892 | ||
2893 | end: | |
2894 | if (directory) { | |
2895 | if (closedir(directory)) { | |
2896 | PERROR("closedir"); | |
2897 | } | |
2898 | } | |
2899 | ||
6c66fa0f JG |
2900 | if (session_found) { |
2901 | ret = 0; | |
dcf266c0 JG |
2902 | } |
2903 | ||
2904 | return ret; | |
2905 | } | |
2906 | ||
ab38c13f DG |
2907 | /* |
2908 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 2909 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
2910 | */ |
2911 | static int validate_path_creds(const char *path) | |
2912 | { | |
2913 | int ret, uid = getuid(); | |
2914 | struct stat buf; | |
2915 | ||
2916 | assert(path); | |
2917 | ||
cf53c06d | 2918 | if (uid == 0) { |
ab38c13f DG |
2919 | goto valid; |
2920 | } | |
2921 | ||
2922 | ret = stat(path, &buf); | |
2923 | if (ret < 0) { | |
2924 | if (errno != ENOENT) { | |
2925 | PERROR("stat"); | |
2926 | } | |
2927 | ret = -LTTNG_ERR_INVALID; | |
2928 | goto valid; | |
2929 | } | |
2930 | ||
2931 | if (buf.st_uid != uid) { | |
2932 | goto invalid; | |
2933 | } | |
2934 | ||
2935 | valid: | |
ab38c13f | 2936 | return 1; |
cf53c06d DG |
2937 | invalid: |
2938 | return 0; | |
ab38c13f DG |
2939 | } |
2940 | ||
dcf266c0 JG |
2941 | LTTNG_HIDDEN |
2942 | int config_load_session(const char *path, const char *session_name, | |
ab38c13f | 2943 | int override, unsigned int autoload) |
dcf266c0 JG |
2944 | { |
2945 | int ret; | |
6c66fa0f | 2946 | bool session_loaded = false; |
cf53c06d | 2947 | const char *path_ptr = NULL; |
dcf266c0 JG |
2948 | struct session_config_validation_ctx validation_ctx = { 0 }; |
2949 | ||
2950 | ret = init_session_config_validation_ctx(&validation_ctx); | |
2951 | if (ret) { | |
2952 | goto end; | |
2953 | } | |
2954 | ||
2955 | if (!path) { | |
ab38c13f DG |
2956 | char *home_path; |
2957 | const char *sys_path; | |
2958 | ||
dcf266c0 | 2959 | /* Try home path */ |
ab38c13f | 2960 | home_path = utils_get_home_dir(); |
dcf266c0 | 2961 | if (home_path) { |
ab38c13f | 2962 | char path[PATH_MAX]; |
dcf266c0 | 2963 | |
d4fcf703 DG |
2964 | /* |
2965 | * Try user session configuration path. Ignore error here so we can | |
2966 | * continue loading the system wide sessions. | |
2967 | */ | |
ab38c13f DG |
2968 | if (autoload) { |
2969 | ret = snprintf(path, sizeof(path), | |
2970 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
2971 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
2972 | if (ret < 0) { |
2973 | PERROR("snprintf session autoload home config path"); | |
2974 | goto end; | |
2975 | } | |
2976 | ||
2977 | /* | |
2978 | * Credentials are only validated for the autoload in order to | |
2979 | * avoid any user session daemon to try to load kernel sessions | |
2980 | * automatically and failing all the times. | |
2981 | */ | |
2982 | ret = validate_path_creds(path); | |
2983 | if (ret) { | |
2984 | path_ptr = path; | |
2985 | } | |
ab38c13f DG |
2986 | } else { |
2987 | ret = snprintf(path, sizeof(path), | |
2988 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
2989 | if (ret < 0) { |
2990 | PERROR("snprintf session home config path"); | |
2991 | goto end; | |
2992 | } | |
2993 | path_ptr = path; | |
ab38c13f | 2994 | } |
cf53c06d DG |
2995 | if (path_ptr) { |
2996 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 DG |
2997 | &validation_ctx, override); |
2998 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
2999 | goto end; | |
3000 | } | |
3001 | /* | |
3002 | * Continue even if the session was found since we have to try | |
3003 | * the system wide sessions. | |
3004 | */ | |
6c66fa0f | 3005 | session_loaded = true; |
ab38c13f | 3006 | } |
d4fcf703 | 3007 | } |
ab38c13f | 3008 | |
cf53c06d DG |
3009 | /* Reset path pointer for the system wide dir. */ |
3010 | path_ptr = NULL; | |
3011 | ||
d4fcf703 DG |
3012 | /* Try system wide configuration directory. */ |
3013 | if (autoload) { | |
3014 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
3015 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
3016 | ret = validate_path_creds(sys_path); |
3017 | if (ret) { | |
3018 | path_ptr = sys_path; | |
3019 | } | |
d4fcf703 | 3020 | } else { |
cf53c06d DG |
3021 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
3022 | path_ptr = sys_path; | |
d4fcf703 DG |
3023 | } |
3024 | ||
cf53c06d DG |
3025 | if (path_ptr) { |
3026 | ret = load_session_from_path(path_ptr, session_name, | |
d4fcf703 | 3027 | &validation_ctx, override); |
6c66fa0f JG |
3028 | if (!ret) { |
3029 | session_loaded = true; | |
3030 | } | |
dcf266c0 JG |
3031 | } |
3032 | } else { | |
3033 | ret = access(path, F_OK); | |
3034 | if (ret < 0) { | |
3035 | PERROR("access"); | |
3036 | switch (errno) { | |
3037 | case ENOENT: | |
3038 | ret = -LTTNG_ERR_INVALID; | |
3039 | WARN("Session configuration path does not exist."); | |
3040 | break; | |
3041 | case EACCES: | |
3042 | ret = -LTTNG_ERR_EPERM; | |
3043 | break; | |
3044 | default: | |
3045 | ret = -LTTNG_ERR_UNK; | |
3046 | break; | |
3047 | } | |
3048 | goto end; | |
3049 | } | |
3050 | ||
3051 | ret = load_session_from_path(path, session_name, | |
3052 | &validation_ctx, override); | |
3053 | } | |
3054 | end: | |
3055 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
3056 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
3057 | /* | |
3058 | * Don't report an error if no sessions are found when called | |
3059 | * without a session_name or a search path. | |
3060 | */ | |
3061 | ret = 0; | |
3062 | } | |
6c66fa0f JG |
3063 | |
3064 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
3065 | /* A matching session was found in one of the search paths. */ | |
3066 | ret = 0; | |
3067 | } | |
dcf266c0 JG |
3068 | return ret; |
3069 | } | |
56766c75 JG |
3070 | |
3071 | static | |
3072 | void __attribute__((destructor)) session_config_exit(void) | |
3073 | { | |
3074 | xmlCleanupParser(); | |
3075 | } | |
fa8b52a2 JR |
3076 | |
3077 | LTTNG_HIDDEN | |
3078 | struct config_document *config_document_get(const char *path) | |
3079 | { | |
3080 | int ret; | |
3081 | struct config_document *document = NULL; | |
3082 | struct session_config_validation_ctx validation_ctx = { 0 }; | |
3083 | ||
3084 | assert(path); | |
3085 | ||
3086 | ret = access(path, F_OK); | |
3087 | if (ret < 0) { | |
3088 | PERROR("access"); | |
3089 | switch (errno) { | |
3090 | case ENOENT: | |
3091 | ERR("Configuration document path does not exist."); | |
3092 | break; | |
3093 | case EACCES: | |
3094 | ERR("Configuration document permission denied."); | |
3095 | break; | |
3096 | default: | |
3097 | ERR("Configuration document unknown error."); | |
3098 | break; | |
3099 | } | |
3100 | goto end; | |
3101 | } | |
3102 | ||
3103 | ret = init_session_config_validation_ctx(&validation_ctx); | |
3104 | if (ret) { | |
3105 | goto end; | |
3106 | } | |
3107 | ||
3108 | ret = validate_file_read_creds(path); | |
3109 | if (ret != 1) { | |
3110 | if (ret == -1) { | |
3111 | ERR("Configuration document permission denied."); | |
3112 | } else { | |
3113 | ERR("Configuration document does not exist."); | |
3114 | } | |
3115 | goto end; | |
3116 | } | |
3117 | ||
3118 | document = zmalloc(sizeof(struct config_document)); | |
3119 | if (!document) { | |
3120 | PERROR("zmalloc"); | |
3121 | goto end; | |
3122 | } | |
3123 | ||
3124 | document->document = xmlParseFile(path); | |
3125 | if (!document->document) { | |
3126 | ERR("Configuration document parsing failed."); | |
3127 | goto error; | |
3128 | } | |
3129 | ||
3130 | ret = xmlSchemaValidateDoc(validation_ctx.schema_validation_ctx, | |
3131 | document->document); | |
3132 | if (ret) { | |
3133 | ERR("Session configuration file validation failed"); | |
3134 | goto error; | |
3135 | } | |
3136 | ||
3137 | end: | |
3138 | return document; | |
3139 | error: | |
3140 | xmlFreeDoc(document->document); | |
3141 | free(document); | |
3142 | return NULL; | |
3143 | } | |
3144 | ||
3145 | LTTNG_HIDDEN | |
3146 | void config_document_free(struct config_document *document) | |
3147 | { | |
3148 | if (document) { | |
3149 | xmlFreeDoc(document->document); | |
3150 | document->document = NULL; | |
3151 | } | |
3152 | } | |
3153 | ||
3154 | LTTNG_HIDDEN | |
3155 | int config_document_replace_element_value(struct config_document *document, | |
3156 | const char *xpath, const char *value) | |
3157 | { | |
3158 | int ret; | |
3159 | int xpath_result_size; | |
3160 | ||
3161 | xmlXPathContextPtr xpath_context = NULL; | |
3162 | xmlXPathObjectPtr xpath_object = NULL; | |
3163 | xmlNodeSetPtr xpath_result_set = NULL; | |
3164 | xmlChar *internal_xpath = NULL; | |
3165 | xmlChar *internal_value = NULL; | |
3166 | ||
3167 | assert(document); | |
3168 | assert(xpath); | |
3169 | assert(value); | |
3170 | ||
3171 | internal_xpath = encode_string(xpath); | |
3172 | if (!internal_xpath) { | |
3173 | ret = -LTTNG_ERR_NOMEM; | |
3174 | ERR("Unable to encode xpath string"); | |
3175 | goto end; | |
3176 | } | |
3177 | ||
3178 | internal_value = encode_string(value); | |
3179 | if (!internal_value) { | |
3180 | ret = -LTTNG_ERR_NOMEM; | |
3181 | ERR("Unable to encode xpath replace value string"); | |
3182 | goto end; | |
3183 | } | |
3184 | ||
3185 | /* Initialize xpath context */ | |
3186 | xpath_context = xmlXPathNewContext(document->document); | |
3187 | if (!xpath_context) { | |
3188 | ret = -LTTNG_ERR_NOMEM; | |
3189 | ERR("Unable to create xpath context"); | |
3190 | goto end; | |
3191 | } | |
3192 | ||
3193 | /* Evaluate de xpath expression */ | |
3194 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); | |
3195 | if (!xpath_object) { | |
3196 | ret = -LTTNG_ERR_CONFIG_INVALID_QUERY; | |
3197 | goto end; | |
3198 | } | |
3199 | ||
3200 | /* TODO: from here could be extracted and previopus could be a step in | |
3201 | * subsequent operation, modify/substitute/delete node. | |
3202 | */ | |
3203 | xpath_result_set = xpath_object->nodesetval; | |
3204 | if (!xpath_result_set) { | |
3205 | ret = -LTTNG_ERR_CONFIG_EMPTY_SET; | |
3206 | goto end; | |
3207 | } | |
3208 | ||
3209 | xpath_result_size = xpath_result_set->nodeNr; | |
3210 | ||
3211 | /* | |
3212 | * Reverse traversal since last element could be nested under parent | |
3213 | * element present in the result set. | |
3214 | */ | |
3215 | for (int i = xpath_result_size - 1; i >=0; i--) { | |
3216 | assert(xpath_result_set->nodeTab[i]); | |
3217 | xmlNodeSetContent(xpath_result_set->nodeTab[i], internal_value); | |
3218 | ||
3219 | /* | |
3220 | * Libxml2 quirk regarding the freing and namesplace node see | |
3221 | * libxml2 example and documentation for more details. | |
3222 | */ | |
3223 | if (xpath_result_set->nodeTab[i]->type != XML_NAMESPACE_DECL) { | |
3224 | xpath_result_set->nodeTab[i] = NULL; | |
3225 | } | |
3226 | } | |
3227 | ||
3228 | end: | |
3229 | xmlXPathFreeContext(xpath_context); | |
3230 | xmlXPathFreeObject(xpath_object); | |
3231 | xmlFree(internal_xpath); | |
3232 | xmlFree(internal_value); | |
3233 | return ret; | |
3234 | } | |
3235 | ||
3236 | LTTNG_HIDDEN | |
3237 | int config_load_configuration_sessions(struct config_document *document, | |
3238 | const char *session_name, int override) | |
3239 | { | |
3240 | int ret; | |
3241 | struct session_config_validation_ctx validation_ctx = { 0 }; | |
3242 | ||
3243 | ret = init_session_config_validation_ctx(&validation_ctx); | |
3244 | if (ret) { | |
3245 | goto end; | |
3246 | } | |
3247 | ret = load_session_from_document(document, session_name, | |
3248 | &validation_ctx, override); | |
3249 | end: | |
3250 | return ret; | |
3251 | } | |
3252 | ||
3253 | LTTNG_HIDDEN | |
3254 | int config_document_replace_element(struct config_document *document, | |
3255 | const char *xpath, const struct config_element *element) | |
3256 | { | |
3257 | int ret = 0; | |
3258 | int xpath_result_size; | |
3259 | ||
3260 | xmlXPathContextPtr xpath_context = NULL; | |
3261 | xmlXPathObjectPtr xpath_object = NULL; | |
3262 | xmlNodeSetPtr xpath_result_set = NULL; | |
3263 | xmlChar *internal_xpath = NULL; | |
3264 | xmlNodePtr old_node = NULL; | |
3265 | xmlNodePtr copy = NULL; | |
3266 | ||
3267 | assert(document); | |
3268 | assert(xpath); | |
3269 | assert(element); | |
3270 | assert(element->element); | |
3271 | ||
3272 | internal_xpath = encode_string(xpath); | |
3273 | if (!internal_xpath) { | |
3274 | ret = -LTTNG_ERR_NOMEM; | |
3275 | ERR("Unable to encode xpath string"); | |
3276 | goto end; | |
3277 | } | |
3278 | ||
3279 | /* Initialize xpath context */ | |
3280 | xpath_context = xmlXPathNewContext(document->document); | |
3281 | if (!xpath_context) { | |
3282 | ret = -LTTNG_ERR_NOMEM; | |
3283 | ERR("Unable to create xpath context"); | |
3284 | goto end; | |
3285 | } | |
3286 | ||
3287 | /* Evaluate the xpath expression */ | |
3288 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); | |
3289 | if (!xpath_object) { | |
3290 | ret = -LTTNG_ERR_CONFIG_INVALID_QUERY; | |
3291 | goto end; | |
3292 | } | |
3293 | ||
3294 | xpath_result_set = xpath_object->nodesetval; | |
3295 | if (!xpath_result_set) { | |
3296 | ret = -LTTNG_ERR_CONFIG_EMPTY_SET; | |
3297 | goto end; | |
3298 | } | |
3299 | ||
3300 | xpath_result_size = xpath_result_set->nodeNr; | |
3301 | ||
3302 | if (xpath_result_size > 1) { | |
3303 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; | |
3304 | goto end; | |
3305 | } | |
3306 | ||
3307 | if (xpath_result_size == 0) { | |
3308 | ret = -LTTNG_ERR_CONFIG_REPLACEMENT; | |
3309 | goto end; | |
3310 | } | |
3311 | ||
3312 | assert(xpath_result_set->nodeTab[0]); | |
3313 | ||
3314 | /* Do a copy of the element to ease caller memory management */ | |
3315 | copy = xmlCopyNode(element->element, 1); | |
3316 | if (!copy) { | |
3317 | ret = -LTTNG_ERR_NOMEM; | |
3318 | ERR("Copy failed for node replacement"); | |
3319 | goto end; | |
3320 | } | |
3321 | ||
3322 | ||
3323 | old_node = xmlReplaceNode(xpath_result_set->nodeTab[0], copy); | |
3324 | if (!old_node) { | |
3325 | ret = -LTTNG_ERR_CONFIG_REPLACEMENT; | |
3326 | xmlFreeNode(copy); | |
3327 | goto end; | |
3328 | } | |
3329 | xmlFree(old_node); | |
3330 | end: | |
3331 | xmlXPathFreeContext(xpath_context); | |
3332 | xmlXPathFreeObject(xpath_object); | |
3333 | xmlFree(internal_xpath); | |
3334 | return ret; | |
3335 | } | |
3336 | ||
3337 | LTTNG_HIDDEN | |
3338 | char *config_document_get_element_value(struct config_document *document, | |
3339 | const char *xpath) | |
3340 | { | |
3341 | char *value = NULL; | |
3342 | int xpath_result_size; | |
3343 | int value_result_size; | |
3344 | ||
3345 | xmlXPathContextPtr xpath_context = NULL; | |
3346 | xmlXPathObjectPtr xpath_object = NULL; | |
3347 | xmlNodeSetPtr xpath_result_set = NULL; | |
3348 | xmlChar *internal_xpath = NULL; | |
3349 | xmlChar *internal_value = NULL; | |
3350 | ||
3351 | assert(document); | |
3352 | assert(xpath); | |
3353 | ||
3354 | internal_xpath = encode_string(xpath); | |
3355 | if (!internal_xpath) { | |
3356 | value = NULL; | |
3357 | ERR("Unable to encode xpath string"); | |
3358 | goto end; | |
3359 | } | |
3360 | ||
3361 | /* Initialize xpath context */ | |
3362 | xpath_context = xmlXPathNewContext(document->document); | |
3363 | if (!xpath_context) { | |
3364 | value = NULL; | |
3365 | ERR("Unable to create xpath context"); | |
3366 | goto end; | |
3367 | } | |
3368 | ||
3369 | /* Evaluate the xpath expression */ | |
3370 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); | |
3371 | if (!xpath_object) { | |
3372 | value = NULL; | |
3373 | ERR("Unable to evaluate xpath query (invalid query format)"); | |
3374 | goto end; | |
3375 | } | |
3376 | ||
3377 | xpath_result_set = xpath_object->nodesetval; | |
3378 | if (!xpath_result_set) { | |
3379 | value = NULL; | |
3380 | goto end; | |
3381 | } | |
3382 | ||
3383 | xpath_result_size = xpath_result_set->nodeNr; | |
3384 | ||
3385 | if (xpath_result_size > 1) { | |
3386 | ERR("To many result while fetching config element value"); | |
3387 | value = NULL; | |
3388 | goto end; | |
3389 | } | |
3390 | ||
3391 | if (xpath_result_size == 0) { | |
3392 | value = NULL; | |
3393 | goto end; | |
3394 | } | |
3395 | ||
3396 | /* | |
3397 | * Reverse traversal since last element could be nested under parent | |
3398 | * element present in the result set. | |
3399 | */ | |
3400 | assert(xpath_result_set->nodeTab[0]); | |
3401 | internal_value = xmlNodeGetContent(xpath_result_set->nodeTab[0]); | |
3402 | if (!internal_value) { | |
3403 | value = NULL; | |
3404 | goto end; | |
3405 | } | |
3406 | ||
3407 | value_result_size = xmlStrlen(internal_value); | |
3408 | value = calloc(value_result_size + 1, sizeof(char)); | |
3409 | strncpy(value, (char *) internal_value, value_result_size); | |
3410 | ||
3411 | end: | |
3412 | xmlXPathFreeContext(xpath_context); | |
3413 | xmlXPathFreeObject(xpath_object); | |
3414 | xmlFree(internal_xpath); | |
3415 | xmlFree(internal_value); | |
3416 | return value; | |
3417 | } | |
3418 | ||
3419 | LTTNG_HIDDEN | |
3420 | int config_document_element_exist(struct config_document *document, | |
3421 | const char *xpath) | |
3422 | { | |
3423 | int exist = 0; | |
3424 | int xpath_result_size; | |
3425 | ||
3426 | xmlXPathContextPtr xpath_context = NULL; | |
3427 | xmlXPathObjectPtr xpath_object = NULL; | |
3428 | xmlNodeSetPtr xpath_result_set = NULL; | |
3429 | xmlChar *internal_xpath = NULL; | |
3430 | ||
3431 | assert(document); | |
3432 | assert(document->document); | |
3433 | assert(xpath); | |
3434 | ||
3435 | internal_xpath = encode_string(xpath); | |
3436 | if (!internal_xpath) { | |
3437 | ERR("Unable to encode xpath string"); | |
3438 | goto end; | |
3439 | } | |
3440 | ||
3441 | /* Initialize xpath context */ | |
3442 | xpath_context = xmlXPathNewContext(document->document); | |
3443 | if (!xpath_context) { | |
3444 | ERR("Unable to create xpath context"); | |
3445 | goto end; | |
3446 | } | |
3447 | ||
3448 | /* Evaluate the xpath expression */ | |
3449 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); | |
3450 | if (!xpath_object) { | |
3451 | ERR("Unable to evaluate xpath query (invalid query format)"); | |
3452 | goto end; | |
3453 | } | |
3454 | ||
3455 | xpath_result_set = xpath_object->nodesetval; | |
3456 | if (!xpath_result_set) { | |
3457 | goto end; | |
3458 | } | |
3459 | ||
3460 | xpath_result_size = xpath_result_set->nodeNr; | |
3461 | ||
3462 | if (xpath_result_size > 0) { | |
3463 | exist = 1; | |
3464 | } | |
3465 | end: | |
3466 | xmlXPathFreeContext(xpath_context); | |
3467 | xmlXPathFreeObject(xpath_object); | |
3468 | xmlFree(internal_xpath); | |
3469 | return exist; | |
3470 | ||
3471 | } | |
3472 | ||
3473 | LTTNG_HIDDEN | |
3474 | struct config_element *config_element_create(const char *name, | |
3475 | const char* value) | |
3476 | { | |
3477 | struct config_element *element; | |
3478 | ||
3479 | assert(name); | |
3480 | ||
3481 | xmlChar *internal_name = NULL; | |
3482 | xmlChar *internal_value = NULL; | |
3483 | ||
3484 | internal_name = encode_string(name); | |
3485 | if (!internal_name) { | |
3486 | ERR("Unable to encode config element name string"); | |
3487 | element = NULL; | |
3488 | goto end; | |
3489 | } | |
3490 | ||
3491 | ||
3492 | if (value) { | |
3493 | internal_value = encode_string(value); | |
3494 | if (!internal_value) { | |
3495 | ERR("Unable to encode config_element value string"); | |
3496 | element = NULL; | |
3497 | goto end; | |
3498 | } | |
3499 | } | |
3500 | ||
3501 | element = zmalloc(sizeof(struct config_element)); | |
3502 | if (!element) { | |
3503 | goto end; | |
3504 | } | |
3505 | ||
3506 | element->element = xmlNewNode(NULL, internal_name); | |
3507 | if (!element->element) { | |
3508 | free(element); | |
3509 | element = NULL; | |
00df7c2f | 3510 | goto end; |
fa8b52a2 JR |
3511 | } |
3512 | ||
3513 | if (internal_value) { | |
3514 | xmlNodeAddContent(element->element, internal_value); | |
3515 | } | |
3516 | end: | |
3517 | xmlFree(internal_name); | |
3518 | xmlFree(internal_value); | |
3519 | return element; | |
3520 | } | |
3521 | ||
3522 | LTTNG_HIDDEN | |
3523 | int config_element_add_child(struct config_element *parent, | |
3524 | const struct config_element *child) | |
3525 | { | |
3526 | assert(parent); | |
3527 | assert(child); | |
3528 | assert(parent->element); | |
3529 | assert(child->element); | |
3530 | ||
3531 | int ret = 0; | |
3532 | xmlNodePtr node = NULL; | |
3533 | xmlNodePtr copy = NULL; | |
3534 | ||
3535 | /* Do a copy to ease the memory management for caller */ | |
3536 | copy = xmlCopyNode(child->element, 1); | |
3537 | if (!copy) { | |
3538 | ret = -LTTNG_ERR_NOMEM; | |
3539 | goto error; | |
3540 | } | |
3541 | node = xmlAddChild(parent->element, copy); | |
3542 | if (!node) { | |
3543 | xmlFreeNode(copy); | |
3544 | ret = -LTTNG_ERR_CONFIG_ADD_CHILD; | |
3545 | goto error; | |
3546 | } | |
3547 | error: | |
3548 | return ret; | |
3549 | } | |
3550 | ||
3551 | ||
3552 | LTTNG_HIDDEN | |
3553 | int config_document_insert_element(struct config_document *document, | |
3554 | const char *xpath, const struct config_element *element) | |
3555 | { | |
3556 | int ret = 0; | |
3557 | int xpath_result_size; | |
3558 | ||
3559 | xmlXPathContextPtr xpath_context = NULL; | |
3560 | xmlXPathObjectPtr xpath_object = NULL; | |
3561 | xmlNodeSetPtr xpath_result_set = NULL; | |
3562 | xmlChar *internal_xpath = NULL; | |
3563 | xmlNodePtr child_node = NULL; | |
3564 | xmlNodePtr local_copy = NULL; | |
3565 | ||
3566 | assert(document); | |
3567 | assert(xpath); | |
3568 | assert(element); | |
3569 | assert(element->element); | |
3570 | ||
3571 | internal_xpath = encode_string(xpath); | |
3572 | if (!internal_xpath) { | |
3573 | ret = -LTTNG_ERR_NOMEM; | |
3574 | goto end; | |
3575 | } | |
3576 | ||
3577 | /* Initialize xpath context */ | |
3578 | xpath_context = xmlXPathNewContext(document->document); | |
3579 | if (!xpath_context) { | |
3580 | ret = -LTTNG_ERR_NOMEM; | |
3581 | goto end; | |
3582 | } | |
3583 | ||
3584 | /* Evaluate the xpath expression */ | |
3585 | xpath_object = xmlXPathEvalExpression(internal_xpath, xpath_context); | |
3586 | if (!xpath_object) { | |
3587 | ret = -LTTNG_ERR_CONFIG_INVALID_QUERY; | |
3588 | goto end; | |
3589 | } | |
3590 | ||
3591 | xpath_result_set = xpath_object->nodesetval; | |
3592 | if (!xpath_result_set) { | |
3593 | ret = -LTTNG_ERR_CONFIG_EMPTY_SET; | |
3594 | goto end; | |
3595 | } | |
3596 | ||
3597 | xpath_result_size = xpath_result_set->nodeNr; | |
3598 | ||
3599 | if (xpath_result_size > 1) { | |
3600 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; | |
3601 | goto end; | |
3602 | } | |
3603 | ||
3604 | if (xpath_result_size == 0) { | |
3605 | ret = -LTTNG_ERR_CONFIG_INVALID_COUNT; | |
3606 | goto end; | |
3607 | } | |
3608 | ||
3609 | assert(xpath_result_set->nodeTab[0]); | |
3610 | /* Do a copy to simply memory management */ | |
3611 | local_copy = xmlCopyNode(element->element, 1); | |
3612 | if (!local_copy) { | |
3613 | ret = -LTTNG_ERR_NOMEM; | |
3614 | ERR("Duplication of node to be insert failed"); | |
3615 | goto end; | |
3616 | } | |
3617 | ||
3618 | child_node = xmlAddChild(xpath_result_set->nodeTab[0], local_copy); | |
3619 | if (!child_node) { | |
3620 | ret = -LTTNG_ERR_CONFIG_ADD_CHILD; | |
3621 | xmlFreeNode(local_copy); | |
3622 | goto end; | |
3623 | } | |
3624 | end: | |
3625 | xmlXPathFreeContext(xpath_context); | |
3626 | xmlXPathFreeObject(xpath_object); | |
3627 | xmlFree(internal_xpath); | |
3628 | return ret; | |
3629 | } | |
3630 | ||
3631 | LTTNG_HIDDEN | |
3632 | void config_element_free(struct config_element *element) { | |
3633 | if (element->element) { | |
3634 | xmlFree(element->element); | |
3635 | } | |
3636 | ||
3637 | free(element); | |
3638 | } |