Commit | Line | Data |
---|---|---|
1501a7f3 JG |
1 | /* |
2 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
1501a7f3 | 19 | #include <assert.h> |
1501a7f3 | 20 | #include <ctype.h> |
1501a7f3 JG |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
36f2332b | 24 | #include <inttypes.h> |
dcf266c0 JG |
25 | #include <dirent.h> |
26 | #include <unistd.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
6c66fa0f | 29 | #include <stdbool.h> |
1501a7f3 JG |
30 | |
31 | #include <common/defaults.h> | |
32 | #include <common/error.h> | |
33 | #include <common/macros.h> | |
34 | #include <common/utils.h> | |
e8fa9fb0 | 35 | #include <common/compat/getenv.h> |
fb198a11 JG |
36 | #include <lttng/lttng-error.h> |
37 | #include <libxml/parser.h> | |
38 | #include <libxml/valid.h> | |
39 | #include <libxml/xmlschemas.h> | |
dcf266c0 JG |
40 | #include <libxml/tree.h> |
41 | #include <lttng/lttng.h> | |
42 | #include <lttng/snapshot.h> | |
1501a7f3 | 43 | |
f40ef1d5 | 44 | #include "session-config.h" |
36f2332b | 45 | #include "config-internal.h" |
1501a7f3 JG |
46 | |
47 | struct handler_filter_args { | |
48 | const char* section; | |
49 | config_entry_handler_cb handler; | |
50 | void *user_data; | |
51 | }; | |
52 | ||
dcf266c0 JG |
53 | struct session_config_validation_ctx { |
54 | xmlSchemaParserCtxtPtr parser_ctx; | |
55 | xmlSchemaPtr schema; | |
56 | xmlSchemaValidCtxtPtr schema_validation_ctx; | |
57 | }; | |
58 | ||
1501a7f3 JG |
59 | const char * const config_str_yes = "yes"; |
60 | const char * const config_str_true = "true"; | |
61 | const char * const config_str_on = "on"; | |
62 | const char * const config_str_no = "no"; | |
63 | const char * const config_str_false = "false"; | |
64 | const char * const config_str_off = "off"; | |
36f2332b | 65 | const char * const config_xml_encoding = "UTF-8"; |
fb198a11 | 66 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
36f2332b JG |
67 | const char * const config_xml_indent_string = "\t"; |
68 | const char * const config_xml_true = "true"; | |
69 | const char * const config_xml_false = "false"; | |
1501a7f3 | 70 | |
fb198a11 JG |
71 | const char * const config_element_channel = "channel"; |
72 | const char * const config_element_channels = "channels"; | |
73 | const char * const config_element_domain = "domain"; | |
74 | const char * const config_element_domains = "domains"; | |
75 | const char * const config_element_event = "event"; | |
76 | const char * const config_element_events = "events"; | |
77 | const char * const config_element_context = "context"; | |
78 | const char * const config_element_contexts = "contexts"; | |
79 | const char * const config_element_attributes = "attributes"; | |
80 | const char * const config_element_exclusion = "exclusion"; | |
81 | const char * const config_element_exclusions = "exclusions"; | |
82 | const char * const config_element_function_attributes = "function_attributes"; | |
83 | const char * const config_element_probe_attributes = "probe_attributes"; | |
84 | const char * const config_element_symbol_name = "symbol_name"; | |
85 | const char * const config_element_address = "address"; | |
86 | const char * const config_element_offset = "offset"; | |
87 | const char * const config_element_name = "name"; | |
88 | const char * const config_element_enabled = "enabled"; | |
89 | const char * const config_element_overwrite_mode = "overwrite_mode"; | |
90 | const char * const config_element_subbuf_size = "subbuffer_size"; | |
91 | const char * const config_element_num_subbuf = "subbuffer_count"; | |
92 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; | |
93 | const char * const config_element_read_timer_interval = "read_timer_interval"; | |
9e9f1809 JG |
94 | LTTNG_HIDDEN const char * const config_element_monitor_timer_interval = "monitor_timer_interval"; |
95 | LTTNG_HIDDEN const char * const config_element_blocking_timeout = "blocking_timeout"; | |
fb198a11 JG |
96 | const char * const config_element_output = "output"; |
97 | const char * const config_element_output_type = "output_type"; | |
98 | const char * const config_element_tracefile_size = "tracefile_size"; | |
99 | const char * const config_element_tracefile_count = "tracefile_count"; | |
100 | const char * const config_element_live_timer_interval = "live_timer_interval"; | |
ec2ed7da JG |
101 | LTTNG_HIDDEN const char * const config_element_discarded_events = "discarded_events"; |
102 | LTTNG_HIDDEN const char * const config_element_lost_packets = "lost_packets"; | |
fb198a11 JG |
103 | const char * const config_element_type = "type"; |
104 | const char * const config_element_buffer_type = "buffer_type"; | |
105 | const char * const config_element_session = "session"; | |
106 | const char * const config_element_sessions = "sessions"; | |
ec2ed7da JG |
107 | LTTNG_HIDDEN const char * const config_element_context_perf = "perf"; |
108 | LTTNG_HIDDEN const char * const config_element_context_app = "app"; | |
109 | LTTNG_HIDDEN const char * const config_element_context_app_provider_name = "provider_name"; | |
110 | LTTNG_HIDDEN const char * const config_element_context_app_ctx_name = "ctx_name"; | |
fb198a11 JG |
111 | const char * const config_element_config = "config"; |
112 | const char * const config_element_started = "started"; | |
113 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
114 | const char * const config_element_loglevel = "loglevel"; | |
115 | const char * const config_element_loglevel_type = "loglevel_type"; | |
116 | const char * const config_element_filter = "filter"; | |
ec2ed7da | 117 | LTTNG_HIDDEN const char * const config_element_filter_expression = "filter_expression"; |
fb198a11 JG |
118 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; |
119 | const char * const config_element_consumer_output = "consumer_output"; | |
120 | const char * const config_element_destination = "destination"; | |
121 | const char * const config_element_path = "path"; | |
122 | const char * const config_element_net_output = "net_output"; | |
123 | const char * const config_element_control_uri = "control_uri"; | |
124 | const char * const config_element_data_uri = "data_uri"; | |
125 | const char * const config_element_max_size = "max_size"; | |
ccf10263 MD |
126 | const char * const config_element_pid = "pid"; |
127 | const char * const config_element_pids = "pids"; | |
9e7c9f56 | 128 | const char * const config_element_shared_memory_path = "shared_memory_path"; |
ebbf5ab7 JR |
129 | const char * const config_element_pid_tracker = "pid_tracker"; |
130 | const char * const config_element_trackers = "trackers"; | |
847a5916 JR |
131 | const char * const config_element_targets = "targets"; |
132 | const char * const config_element_target_pid = "pid_target"; | |
fb198a11 JG |
133 | |
134 | const char * const config_domain_type_kernel = "KERNEL"; | |
135 | const char * const config_domain_type_ust = "UST"; | |
136 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 137 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 138 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
139 | |
140 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
141 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
142 | const char * const config_buffer_type_global = "GLOBAL"; | |
143 | ||
144 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
145 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
146 | ||
147 | const char * const config_output_type_splice = "SPLICE"; | |
148 | const char * const config_output_type_mmap = "MMAP"; | |
149 | ||
150 | const char * const config_loglevel_type_all = "ALL"; | |
151 | const char * const config_loglevel_type_range = "RANGE"; | |
152 | const char * const config_loglevel_type_single = "SINGLE"; | |
153 | ||
154 | const char * const config_event_type_all = "ALL"; | |
155 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
156 | const char * const config_event_type_probe = "PROBE"; | |
157 | const char * const config_event_type_function = "FUNCTION"; | |
158 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
159 | const char * const config_event_type_noop = "NOOP"; | |
160 | const char * const config_event_type_syscall = "SYSCALL"; | |
161 | const char * const config_event_type_kprobe = "KPROBE"; | |
162 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
163 | ||
164 | const char * const config_event_context_pid = "PID"; | |
165 | const char * const config_event_context_procname = "PROCNAME"; | |
166 | const char * const config_event_context_prio = "PRIO"; | |
167 | const char * const config_event_context_nice = "NICE"; | |
168 | const char * const config_event_context_vpid = "VPID"; | |
169 | const char * const config_event_context_tid = "TID"; | |
170 | const char * const config_event_context_vtid = "VTID"; | |
171 | const char * const config_event_context_ppid = "PPID"; | |
172 | const char * const config_event_context_vppid = "VPPID"; | |
173 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
174 | const char * const config_event_context_hostname = "HOSTNAME"; | |
175 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 176 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
ec2ed7da JG |
177 | LTTNG_HIDDEN const char * const config_event_context_app = "APP"; |
178 | LTTNG_HIDDEN const char * const config_event_context_interruptible = "INTERRUPTIBLE"; | |
179 | LTTNG_HIDDEN const char * const config_event_context_preemptible = "PREEMPTIBLE"; | |
180 | LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE"; | |
181 | LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; | |
fb198a11 | 182 | |
fbd987c9 JG |
183 | /* Deprecated symbols */ |
184 | const char * const config_element_perf; | |
185 | ||
d7b645e2 JR |
186 | enum process_event_node_phase { |
187 | CREATION = 0, | |
188 | ENABLE = 1, | |
189 | }; | |
190 | ||
dcf266c0 JG |
191 | struct consumer_output { |
192 | int enabled; | |
193 | char *path; | |
194 | char *control_uri; | |
195 | char *data_uri; | |
196 | }; | |
197 | ||
1501a7f3 JG |
198 | static int config_entry_handler_filter(struct handler_filter_args *args, |
199 | const char *section, const char *name, const char *value) | |
200 | { | |
201 | int ret = 0; | |
202 | struct config_entry entry = { section, name, value }; | |
203 | ||
204 | assert(args); | |
205 | ||
206 | if (!section || !name || !value) { | |
207 | ret = -EIO; | |
208 | goto end; | |
209 | } | |
210 | ||
211 | if (args->section) { | |
212 | if (strcmp(args->section, section)) { | |
213 | goto end; | |
214 | } | |
215 | } | |
216 | ||
217 | ret = args->handler(&entry, args->user_data); | |
218 | end: | |
219 | return ret; | |
220 | } | |
221 | ||
222 | LTTNG_HIDDEN | |
223 | int config_get_section_entries(const char *override_path, const char *section, | |
224 | config_entry_handler_cb handler, void *user_data) | |
225 | { | |
226 | int ret = 0; | |
7ab02a27 | 227 | char *path; |
1501a7f3 JG |
228 | FILE *config_file = NULL; |
229 | struct handler_filter_args filter = { section, handler, user_data }; | |
230 | ||
7ab02a27 DG |
231 | /* First, try system-wide conf. file. */ |
232 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
233 | ||
234 | config_file = fopen(path, "r"); | |
235 | if (config_file) { | |
236 | DBG("Loading daemon conf file at %s", path); | |
237 | /* | |
238 | * Return value is not very important here since error or not, we | |
239 | * continue and try the next possible conf. file. | |
240 | */ | |
241 | (void) ini_parse_file(config_file, | |
242 | (ini_entry_handler) config_entry_handler_filter, | |
243 | (void *) &filter); | |
244 | fclose(config_file); | |
245 | } | |
246 | ||
247 | /* Second is the user local configuration. */ | |
248 | path = utils_get_home_dir(); | |
249 | if (path) { | |
250 | char fullpath[PATH_MAX]; | |
251 | ||
252 | ret = snprintf(fullpath, sizeof(fullpath), | |
253 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
254 | if (ret < 0) { | |
255 | PERROR("snprintf user conf. path"); | |
256 | goto error; | |
257 | } | |
258 | ||
259 | config_file = fopen(fullpath, "r"); | |
260 | if (config_file) { | |
261 | DBG("Loading daemon user conf file at %s", path); | |
262 | /* | |
263 | * Return value is not very important here since error or not, we | |
264 | * continue and try the next possible conf. file. | |
265 | */ | |
266 | (void) ini_parse_file(config_file, | |
267 | (ini_entry_handler) config_entry_handler_filter, | |
268 | (void *) &filter); | |
269 | fclose(config_file); | |
270 | } | |
271 | } | |
272 | ||
273 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
274 | if (override_path) { |
275 | config_file = fopen(override_path, "r"); | |
276 | if (config_file) { | |
7ab02a27 DG |
277 | DBG("Loading daemon command line conf file at %s", override_path); |
278 | (void) ini_parse_file(config_file, | |
279 | (ini_entry_handler) config_entry_handler_filter, | |
280 | (void *) &filter); | |
281 | fclose(config_file); | |
1501a7f3 JG |
282 | } else { |
283 | ERR("Failed to open daemon configuration file at %s", | |
284 | override_path); | |
285 | ret = -ENOENT; | |
7ab02a27 | 286 | goto error; |
1501a7f3 JG |
287 | } |
288 | } | |
289 | ||
7ab02a27 DG |
290 | /* Everything went well. */ |
291 | ret = 0; | |
1501a7f3 | 292 | |
7ab02a27 | 293 | error: |
1501a7f3 JG |
294 | return ret; |
295 | } | |
296 | ||
297 | LTTNG_HIDDEN | |
298 | int config_parse_value(const char *value) | |
299 | { | |
300 | int i, ret = 0; | |
301 | char *endptr, *lower_str; | |
302 | size_t len; | |
303 | unsigned long v; | |
304 | ||
305 | len = strlen(value); | |
306 | if (!len) { | |
307 | ret = -1; | |
308 | goto end; | |
309 | } | |
310 | ||
311 | v = strtoul(value, &endptr, 10); | |
312 | if (endptr != value) { | |
313 | ret = v; | |
314 | goto end; | |
315 | } | |
316 | ||
317 | lower_str = zmalloc(len + 1); | |
318 | if (!lower_str) { | |
319 | PERROR("zmalloc"); | |
320 | ret = -errno; | |
321 | goto end; | |
322 | } | |
323 | ||
324 | for (i = 0; i < len; i++) { | |
325 | lower_str[i] = tolower(value[i]); | |
326 | } | |
327 | ||
328 | if (!strcmp(lower_str, config_str_yes) || | |
329 | !strcmp(lower_str, config_str_true) || | |
330 | !strcmp(lower_str, config_str_on)) { | |
331 | ret = 1; | |
332 | } else if (!strcmp(lower_str, config_str_no) || | |
333 | !strcmp(lower_str, config_str_false) || | |
334 | !strcmp(lower_str, config_str_off)) { | |
335 | ret = 0; | |
336 | } else { | |
337 | ret = -1; | |
338 | } | |
339 | ||
340 | free(lower_str); | |
341 | end: | |
342 | return ret; | |
343 | } | |
36f2332b JG |
344 | |
345 | /* | |
346 | * Returns a xmlChar string which must be released using xmlFree(). | |
347 | */ | |
348 | static xmlChar *encode_string(const char *in_str) | |
349 | { | |
350 | xmlChar *out_str = NULL; | |
351 | xmlCharEncodingHandlerPtr handler; | |
352 | int out_len, ret, in_len; | |
353 | ||
354 | assert(in_str); | |
355 | ||
356 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
357 | if (!handler) { | |
358 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
359 | goto end; | |
360 | } | |
361 | ||
362 | in_len = strlen(in_str); | |
363 | /* | |
f76d886f JG |
364 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
365 | * used because UTF-8 characters can take up to 4 bytes. | |
36f2332b | 366 | */ |
f76d886f | 367 | out_len = (in_len * 4) + 1; |
36f2332b JG |
368 | out_str = xmlMalloc(out_len); |
369 | if (!out_str) { | |
370 | goto end; | |
371 | } | |
372 | ||
373 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
374 | if (ret < 0) { | |
375 | xmlFree(out_str); | |
376 | out_str = NULL; | |
377 | goto end; | |
378 | } | |
379 | ||
380 | /* out_len is now the size of out_str */ | |
381 | out_str[out_len] = '\0'; | |
382 | end: | |
383 | return out_str; | |
384 | } | |
385 | ||
386 | LTTNG_HIDDEN | |
705bb62f | 387 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
388 | { |
389 | int ret; | |
390 | struct config_writer *writer; | |
391 | xmlOutputBufferPtr buffer; | |
392 | ||
393 | writer = zmalloc(sizeof(struct config_writer)); | |
394 | if (!writer) { | |
395 | PERROR("zmalloc config_writer_create"); | |
396 | goto end; | |
397 | } | |
398 | ||
399 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
400 | if (!buffer) { | |
401 | goto error_destroy; | |
402 | } | |
403 | ||
404 | writer->writer = xmlNewTextWriter(buffer); | |
405 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
406 | config_xml_encoding, NULL); | |
407 | if (ret < 0) { | |
408 | goto error_destroy; | |
409 | } | |
410 | ||
411 | ret = xmlTextWriterSetIndentString(writer->writer, | |
412 | BAD_CAST config_xml_indent_string); | |
705bb62f | 413 | if (ret) { |
36f2332b JG |
414 | goto error_destroy; |
415 | } | |
416 | ||
705bb62f JRJ |
417 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
418 | if (ret) { | |
36f2332b JG |
419 | goto error_destroy; |
420 | } | |
421 | ||
422 | end: | |
423 | return writer; | |
424 | error_destroy: | |
425 | config_writer_destroy(writer); | |
426 | return NULL; | |
427 | } | |
428 | ||
429 | LTTNG_HIDDEN | |
430 | int config_writer_destroy(struct config_writer *writer) | |
431 | { | |
432 | int ret = 0; | |
433 | ||
434 | if (!writer) { | |
435 | ret = -EINVAL; | |
436 | goto end; | |
437 | } | |
438 | ||
439 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
440 | WARN("Could not close XML document"); | |
441 | ret = -EIO; | |
442 | } | |
443 | ||
444 | if (writer->writer) { | |
445 | xmlFreeTextWriter(writer->writer); | |
446 | } | |
447 | ||
448 | free(writer); | |
449 | end: | |
450 | return ret; | |
451 | } | |
452 | ||
453 | LTTNG_HIDDEN | |
454 | int config_writer_open_element(struct config_writer *writer, | |
455 | const char *element_name) | |
456 | { | |
457 | int ret; | |
458 | xmlChar *encoded_element_name; | |
459 | ||
460 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
461 | ret = -1; | |
462 | goto end; | |
463 | } | |
464 | ||
465 | encoded_element_name = encode_string(element_name); | |
466 | if (!encoded_element_name) { | |
467 | ret = -1; | |
468 | goto end; | |
469 | } | |
470 | ||
471 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
472 | xmlFree(encoded_element_name); | |
473 | end: | |
28676a1d | 474 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
475 | } |
476 | ||
e10b6a1c JG |
477 | LTTNG_HIDDEN |
478 | int config_writer_write_attribute(struct config_writer *writer, | |
479 | const char *name, const char *value) | |
480 | { | |
481 | int ret; | |
482 | xmlChar *encoded_name = NULL; | |
483 | xmlChar *encoded_value = NULL; | |
484 | ||
485 | if (!writer || !writer->writer || !name || !name[0]) { | |
486 | ret = -1; | |
487 | goto end; | |
488 | } | |
489 | ||
490 | encoded_name = encode_string(name); | |
491 | if (!encoded_name) { | |
492 | ret = -1; | |
493 | goto end; | |
494 | } | |
495 | ||
496 | encoded_value = encode_string(value); | |
497 | if (!encoded_value) { | |
498 | ret = -1; | |
499 | goto end; | |
500 | } | |
501 | ||
502 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, | |
503 | encoded_value); | |
504 | end: | |
505 | xmlFree(encoded_name); | |
506 | xmlFree(encoded_value); | |
507 | return ret >= 0 ? 0 : ret; | |
508 | } | |
509 | ||
36f2332b JG |
510 | LTTNG_HIDDEN |
511 | int config_writer_close_element(struct config_writer *writer) | |
512 | { | |
513 | int ret; | |
514 | ||
515 | if (!writer || !writer->writer) { | |
516 | ret = -1; | |
517 | goto end; | |
518 | } | |
519 | ||
520 | ret = xmlTextWriterEndElement(writer->writer); | |
521 | end: | |
28676a1d | 522 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
523 | } |
524 | ||
525 | LTTNG_HIDDEN | |
526 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
527 | const char *element_name, uint64_t value) | |
528 | { | |
529 | int ret; | |
530 | xmlChar *encoded_element_name; | |
531 | ||
532 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
533 | ret = -1; | |
534 | goto end; | |
535 | } | |
536 | ||
537 | encoded_element_name = encode_string(element_name); | |
538 | if (!encoded_element_name) { | |
539 | ret = -1; | |
540 | goto end; | |
541 | } | |
542 | ||
543 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
544 | encoded_element_name, "%" PRIu64, value); | |
545 | xmlFree(encoded_element_name); | |
546 | end: | |
28676a1d | 547 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
548 | } |
549 | ||
550 | LTTNG_HIDDEN | |
551 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
552 | const char *element_name, int64_t value) | |
553 | { | |
554 | int ret; | |
555 | xmlChar *encoded_element_name; | |
556 | ||
557 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
558 | ret = -1; | |
559 | goto end; | |
560 | } | |
561 | ||
562 | encoded_element_name = encode_string(element_name); | |
563 | if (!encoded_element_name) { | |
564 | ret = -1; | |
565 | goto end; | |
566 | } | |
567 | ||
568 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
569 | encoded_element_name, "%" PRIi64, value); | |
570 | xmlFree(encoded_element_name); | |
571 | end: | |
28676a1d | 572 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
573 | } |
574 | ||
575 | LTTNG_HIDDEN | |
576 | int config_writer_write_element_bool(struct config_writer *writer, | |
577 | const char *element_name, int value) | |
578 | { | |
579 | return config_writer_write_element_string(writer, element_name, | |
580 | value ? config_xml_true : config_xml_false); | |
581 | } | |
582 | ||
583 | LTTNG_HIDDEN | |
584 | int config_writer_write_element_string(struct config_writer *writer, | |
585 | const char *element_name, const char *value) | |
586 | { | |
587 | int ret; | |
588 | xmlChar *encoded_element_name = NULL; | |
589 | xmlChar *encoded_value = NULL; | |
590 | ||
591 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
592 | !value) { | |
593 | ret = -1; | |
594 | goto end; | |
595 | } | |
596 | ||
597 | encoded_element_name = encode_string(element_name); | |
598 | if (!encoded_element_name) { | |
599 | ret = -1; | |
600 | goto end; | |
601 | } | |
602 | ||
603 | encoded_value = encode_string(value); | |
604 | if (!encoded_value) { | |
605 | ret = -1; | |
606 | goto end; | |
607 | } | |
608 | ||
609 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 610 | encoded_value); |
36f2332b JG |
611 | end: |
612 | xmlFree(encoded_element_name); | |
613 | xmlFree(encoded_value); | |
28676a1d | 614 | return ret >= 0 ? 0 : ret; |
36f2332b | 615 | } |
dcf266c0 JG |
616 | |
617 | static | |
618 | void xml_error_handler(void *ctx, const char *format, ...) | |
619 | { | |
620 | char *errMsg; | |
621 | va_list args; | |
622 | int ret; | |
623 | ||
624 | va_start(args, format); | |
625 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 626 | va_end(args); |
dcf266c0 JG |
627 | if (ret == -1) { |
628 | ERR("String allocation failed in xml error handler"); | |
629 | return; | |
630 | } | |
dcf266c0 JG |
631 | |
632 | fprintf(stderr, "XML Error: %s", errMsg); | |
633 | free(errMsg); | |
634 | } | |
635 | ||
636 | static | |
637 | void fini_session_config_validation_ctx( | |
638 | struct session_config_validation_ctx *ctx) | |
639 | { | |
640 | if (ctx->parser_ctx) { | |
641 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
642 | } | |
643 | ||
644 | if (ctx->schema) { | |
645 | xmlSchemaFree(ctx->schema); | |
646 | } | |
647 | ||
648 | if (ctx->schema_validation_ctx) { | |
649 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
650 | } | |
651 | ||
652 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
653 | } | |
654 | ||
54e399cb JG |
655 | static |
656 | char *get_session_config_xsd_path() | |
657 | { | |
658 | char *xsd_path; | |
e8fa9fb0 | 659 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
660 | size_t base_path_len; |
661 | size_t max_path_len; | |
662 | ||
663 | if (!base_path) { | |
664 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
665 | } | |
666 | ||
667 | base_path_len = strlen(base_path); | |
668 | max_path_len = base_path_len + | |
669 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
670 | xsd_path = zmalloc(max_path_len); | |
671 | if (!xsd_path) { | |
672 | goto end; | |
673 | } | |
674 | ||
675 | strncpy(xsd_path, base_path, max_path_len); | |
676 | if (xsd_path[base_path_len - 1] != '/') { | |
677 | xsd_path[base_path_len++] = '/'; | |
678 | } | |
679 | ||
680 | strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME, | |
681 | max_path_len - base_path_len); | |
682 | end: | |
683 | return xsd_path; | |
684 | } | |
685 | ||
dcf266c0 JG |
686 | static |
687 | int init_session_config_validation_ctx( | |
688 | struct session_config_validation_ctx *ctx) | |
689 | { | |
690 | int ret; | |
54e399cb JG |
691 | char *xsd_path = get_session_config_xsd_path(); |
692 | ||
693 | if (!xsd_path) { | |
694 | ret = -LTTNG_ERR_NOMEM; | |
695 | goto end; | |
696 | } | |
dcf266c0 | 697 | |
54e399cb | 698 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
699 | if (!ctx->parser_ctx) { |
700 | ERR("XSD parser context creation failed"); | |
701 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
702 | goto end; | |
703 | } | |
704 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
705 | xml_error_handler, NULL); | |
706 | ||
707 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
708 | if (!ctx->schema) { | |
709 | ERR("XSD parsing failed"); | |
710 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
711 | goto end; | |
712 | } | |
713 | ||
714 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
715 | if (!ctx->schema_validation_ctx) { | |
716 | ERR("XSD validation context creation failed"); | |
717 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
718 | goto end; | |
719 | } | |
720 | ||
721 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
722 | xml_error_handler, NULL); | |
723 | ret = 0; | |
724 | ||
725 | end: | |
726 | if (ret) { | |
727 | fini_session_config_validation_ctx(ctx); | |
728 | } | |
729 | ||
54e399cb | 730 | free(xsd_path); |
dcf266c0 JG |
731 | return ret; |
732 | } | |
733 | ||
734 | static | |
735 | int parse_uint(xmlChar *str, uint64_t *val) | |
736 | { | |
737 | int ret; | |
738 | char *endptr; | |
739 | ||
740 | if (!str || !val) { | |
741 | ret = -1; | |
742 | goto end; | |
743 | } | |
744 | ||
745 | *val = strtoull((const char *) str, &endptr, 10); | |
746 | if (!endptr || *endptr) { | |
747 | ret = -1; | |
748 | } else { | |
749 | ret = 0; | |
750 | } | |
751 | ||
752 | end: | |
753 | return ret; | |
754 | } | |
755 | ||
756 | static | |
757 | int parse_int(xmlChar *str, int64_t *val) | |
758 | { | |
759 | int ret; | |
760 | char *endptr; | |
761 | ||
762 | if (!str || !val) { | |
763 | ret = -1; | |
764 | goto end; | |
765 | } | |
766 | ||
767 | *val = strtoll((const char *) str, &endptr, 10); | |
768 | if (!endptr || *endptr) { | |
769 | ret = -1; | |
770 | } else { | |
771 | ret = 0; | |
772 | } | |
773 | ||
774 | end: | |
775 | return ret; | |
776 | } | |
777 | ||
778 | static | |
779 | int parse_bool(xmlChar *str, int *val) | |
780 | { | |
781 | int ret = 0; | |
782 | ||
783 | if (!str || !val) { | |
784 | ret = -1; | |
785 | goto end; | |
786 | } | |
787 | ||
788 | if (!strcmp((const char *) str, config_xml_true)) { | |
789 | *val = 1; | |
790 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
791 | *val = 0; | |
792 | } else { | |
793 | WARN("Invalid boolean value encoutered (%s).", | |
794 | (const char *) str); | |
795 | ret = -1; | |
796 | } | |
797 | end: | |
798 | return ret; | |
799 | } | |
800 | ||
801 | static | |
802 | int get_domain_type(xmlChar *domain) | |
803 | { | |
804 | int ret; | |
805 | ||
806 | if (!domain) { | |
807 | goto error; | |
808 | } | |
809 | ||
810 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
811 | ret = LTTNG_DOMAIN_KERNEL; | |
812 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
813 | ret = LTTNG_DOMAIN_UST; | |
814 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
815 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
816 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
817 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
818 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
819 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
820 | } else { |
821 | goto error; | |
822 | } | |
823 | ||
824 | return ret; | |
825 | error: | |
826 | return -1; | |
827 | } | |
828 | ||
829 | static | |
830 | int get_buffer_type(xmlChar *buffer_type) | |
831 | { | |
832 | int ret; | |
833 | ||
834 | if (!buffer_type) { | |
835 | goto error; | |
836 | } | |
837 | ||
838 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
839 | ret = LTTNG_BUFFER_GLOBAL; | |
840 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
841 | ret = LTTNG_BUFFER_PER_UID; | |
842 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
843 | ret = LTTNG_BUFFER_PER_PID; | |
844 | } else { | |
845 | goto error; | |
846 | } | |
847 | ||
848 | return ret; | |
849 | error: | |
850 | return -1; | |
851 | } | |
852 | ||
853 | static | |
854 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
855 | { | |
856 | int ret; | |
857 | ||
858 | if (!overwrite_mode) { | |
859 | goto error; | |
860 | } | |
861 | ||
862 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
863 | ret = 1; | |
864 | } else if (!strcmp((char *) overwrite_mode, | |
865 | config_overwrite_mode_discard)) { | |
866 | ret = 0; | |
867 | } else { | |
868 | goto error; | |
869 | } | |
870 | ||
871 | return ret; | |
872 | error: | |
873 | return -1; | |
874 | } | |
875 | ||
876 | static | |
877 | int get_output_type(xmlChar *output_type) | |
878 | { | |
879 | int ret; | |
880 | ||
881 | if (!output_type) { | |
882 | goto error; | |
883 | } | |
884 | ||
885 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
886 | ret = LTTNG_EVENT_MMAP; | |
887 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
888 | ret = LTTNG_EVENT_SPLICE; | |
889 | } else { | |
890 | goto error; | |
891 | } | |
892 | ||
893 | return ret; | |
894 | error: | |
895 | return -1; | |
896 | } | |
897 | ||
898 | static | |
899 | int get_event_type(xmlChar *event_type) | |
900 | { | |
901 | int ret; | |
902 | ||
903 | if (!event_type) { | |
904 | goto error; | |
905 | } | |
906 | ||
907 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
908 | ret = LTTNG_EVENT_ALL; | |
909 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
910 | ret = LTTNG_EVENT_TRACEPOINT; | |
911 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
912 | ret = LTTNG_EVENT_PROBE; | |
913 | } else if (!strcmp((char *) event_type, config_event_type_function)) { | |
914 | ret = LTTNG_EVENT_FUNCTION; | |
915 | } else if (!strcmp((char *) event_type, | |
916 | config_event_type_function_entry)) { | |
917 | ret = LTTNG_EVENT_FUNCTION_ENTRY; | |
918 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
919 | ret = LTTNG_EVENT_NOOP; | |
920 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
921 | ret = LTTNG_EVENT_SYSCALL; | |
922 | } else { | |
923 | goto error; | |
924 | } | |
925 | ||
926 | return ret; | |
927 | error: | |
928 | return -1; | |
929 | } | |
930 | ||
931 | static | |
932 | int get_loglevel_type(xmlChar *loglevel_type) | |
933 | { | |
934 | int ret; | |
935 | ||
936 | if (!loglevel_type) { | |
937 | goto error; | |
938 | } | |
939 | ||
940 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
941 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
942 | } else if (!strcmp((char *) loglevel_type, | |
943 | config_loglevel_type_range)) { | |
944 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
945 | } else if (!strcmp((char *) loglevel_type, | |
946 | config_loglevel_type_single)) { | |
947 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
948 | } else { | |
949 | goto error; | |
950 | } | |
951 | ||
952 | return ret; | |
953 | error: | |
954 | return -1; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Return the context type or -1 on error. | |
959 | */ | |
960 | static | |
961 | int get_context_type(xmlChar *context_type) | |
962 | { | |
963 | int ret; | |
964 | ||
965 | if (!context_type) { | |
966 | goto error; | |
967 | } | |
968 | ||
969 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
970 | ret = LTTNG_EVENT_CONTEXT_PID; | |
971 | } else if (!strcmp((char *) context_type, | |
972 | config_event_context_procname)) { | |
973 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
974 | } else if (!strcmp((char *) context_type, | |
975 | config_event_context_prio)) { | |
976 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
977 | } else if (!strcmp((char *) context_type, | |
978 | config_event_context_nice)) { | |
979 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
980 | } else if (!strcmp((char *) context_type, | |
981 | config_event_context_vpid)) { | |
982 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
983 | } else if (!strcmp((char *) context_type, | |
984 | config_event_context_tid)) { | |
985 | ret = LTTNG_EVENT_CONTEXT_TID; | |
986 | } else if (!strcmp((char *) context_type, | |
987 | config_event_context_vtid)) { | |
988 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
989 | } else if (!strcmp((char *) context_type, | |
990 | config_event_context_ppid)) { | |
991 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
992 | } else if (!strcmp((char *) context_type, | |
993 | config_event_context_vppid)) { | |
994 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
995 | } else if (!strcmp((char *) context_type, | |
996 | config_event_context_pthread_id)) { | |
997 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
998 | } else if (!strcmp((char *) context_type, | |
999 | config_event_context_hostname)) { | |
1000 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
1001 | } else if (!strcmp((char *) context_type, | |
1002 | config_event_context_ip)) { | |
1003 | ret = LTTNG_EVENT_CONTEXT_IP; | |
1ae5e83e JD |
1004 | } else if (!strcmp((char *) context_type, |
1005 | config_event_context_interruptible)) { | |
1006 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; | |
1007 | } else if (!strcmp((char *) context_type, | |
1008 | config_event_context_preemptible)) { | |
1009 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; | |
1010 | } else if (!strcmp((char *) context_type, | |
1011 | config_event_context_need_reschedule)) { | |
1012 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; | |
1013 | } else if (!strcmp((char *) context_type, | |
1014 | config_event_context_migratable)) { | |
1015 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; | |
dcf266c0 JG |
1016 | } else { |
1017 | goto error; | |
1018 | } | |
1019 | ||
1020 | return ret; | |
1021 | error: | |
1022 | return -1; | |
1023 | } | |
1024 | ||
1025 | static | |
1026 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
1027 | { | |
1028 | int ret; | |
1029 | xmlNodePtr node; | |
1030 | ||
1031 | for (node = xmlFirstElementChild(domain_node); node; | |
1032 | node = xmlNextElementSibling(node)) { | |
1033 | if (!strcmp((const char *) node->name, config_element_type)) { | |
1034 | /* domain type */ | |
1035 | xmlChar *node_content = xmlNodeGetContent(node); | |
1036 | if (!node_content) { | |
1037 | ret = -LTTNG_ERR_NOMEM; | |
1038 | goto end; | |
1039 | } | |
1040 | ||
1041 | ret = get_domain_type(node_content); | |
1042 | free(node_content); | |
1043 | if (ret < 0) { | |
1044 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1045 | goto end; | |
1046 | } | |
1047 | ||
1048 | domain->type = ret; | |
1049 | } else if (!strcmp((const char *) node->name, | |
1050 | config_element_buffer_type)) { | |
1051 | /* buffer type */ | |
1052 | xmlChar *node_content = xmlNodeGetContent(node); | |
1053 | if (!node_content) { | |
1054 | ret = -LTTNG_ERR_NOMEM; | |
1055 | goto end; | |
1056 | } | |
1057 | ||
1058 | ret = get_buffer_type(node_content); | |
1059 | free(node_content); | |
1060 | if (ret < 0) { | |
1061 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1062 | goto end; | |
1063 | } | |
1064 | ||
1065 | domain->buf_type = ret; | |
1066 | } | |
1067 | } | |
1068 | ret = 0; | |
1069 | end: | |
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | static | |
1074 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1075 | char **data_uri) | |
1076 | { | |
1077 | xmlNodePtr node; | |
1078 | ||
1079 | for (node = xmlFirstElementChild(net_output_node); node; | |
1080 | node = xmlNextElementSibling(node)) { | |
1081 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1082 | /* control_uri */ | |
1083 | *control_uri = (char *) xmlNodeGetContent(node); | |
1084 | if (!*control_uri) { | |
1085 | break; | |
1086 | } | |
1087 | } else { | |
1088 | /* data_uri */ | |
1089 | *data_uri = (char *) xmlNodeGetContent(node); | |
1090 | if (!*data_uri) { | |
1091 | break; | |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1097 | } | |
1098 | ||
1099 | static | |
1100 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1101 | struct consumer_output *output) | |
1102 | { | |
1103 | int ret; | |
1104 | xmlNodePtr node; | |
1105 | ||
1106 | assert(output); | |
1107 | ||
1108 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1109 | node = xmlNextElementSibling(node)) { | |
1110 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1111 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1112 | ||
1113 | /* enabled */ | |
1114 | if (!enabled_str) { | |
1115 | ret = -LTTNG_ERR_NOMEM; | |
1116 | goto end; | |
1117 | } | |
1118 | ||
1119 | ret = parse_bool(enabled_str, &output->enabled); | |
1120 | free(enabled_str); | |
1121 | if (ret) { | |
1122 | goto end; | |
1123 | } | |
1124 | } else { | |
1125 | xmlNodePtr output_type_node; | |
1126 | ||
1127 | /* destination */ | |
1128 | output_type_node = xmlFirstElementChild(node); | |
1129 | if (!output_type_node) { | |
1130 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1131 | goto end; | |
1132 | } | |
1133 | ||
1134 | if (!strcmp((const char *) output_type_node->name, | |
1135 | config_element_path)) { | |
1136 | /* path */ | |
1137 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1138 | if (!output->path) { | |
1139 | ret = -LTTNG_ERR_NOMEM; | |
1140 | goto end; | |
1141 | } | |
1142 | } else { | |
1143 | /* net_output */ | |
1144 | ret = get_net_output_uris(output_type_node, | |
1145 | &output->control_uri, &output->data_uri); | |
1146 | if (ret) { | |
1147 | goto end; | |
1148 | } | |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | ret = 0; | |
1153 | ||
1154 | end: | |
1155 | if (ret) { | |
1156 | free(output->path); | |
1157 | free(output->control_uri); | |
1158 | free(output->data_uri); | |
1159 | memset(output, 0, sizeof(struct consumer_output)); | |
1160 | } | |
1161 | return ret; | |
1162 | } | |
1163 | ||
1164 | static | |
95681498 JG |
1165 | int create_session_net_output(const char *name, const char *control_uri, |
1166 | const char *data_uri) | |
dcf266c0 JG |
1167 | { |
1168 | int ret; | |
1169 | struct lttng_handle *handle; | |
1170 | const char *uri = NULL; | |
1171 | ||
1172 | assert(name); | |
dcf266c0 | 1173 | |
95681498 | 1174 | handle = lttng_create_handle(name, NULL); |
dcf266c0 JG |
1175 | if (!handle) { |
1176 | ret = -LTTNG_ERR_NOMEM; | |
1177 | goto end; | |
1178 | } | |
1179 | ||
1180 | if (!control_uri || !data_uri) { | |
1181 | uri = control_uri ? control_uri : data_uri; | |
1182 | control_uri = uri; | |
1183 | data_uri = uri; | |
1184 | } | |
1185 | ||
1186 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1187 | lttng_destroy_handle(handle); | |
1188 | end: | |
1189 | return ret; | |
1190 | } | |
1191 | ||
1192 | static | |
1b08cbce JR |
1193 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node, |
1194 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
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; | |
1221 | uint64_t max_size = UINT64_MAX; | |
1222 | struct consumer_output output = { 0 }; | |
1223 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1b08cbce JR |
1224 | const char *control_uri = NULL; |
1225 | const char *data_uri = NULL; | |
1226 | const char *path = NULL; | |
dcf266c0 JG |
1227 | |
1228 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1229 | node = xmlNextElementSibling(node)) { | |
1230 | if (!strcmp((const char *) node->name, | |
1231 | config_element_name)) { | |
1232 | /* name */ | |
1233 | name = (char *) xmlNodeGetContent(node); | |
1234 | if (!name) { | |
1235 | ret = -LTTNG_ERR_NOMEM; | |
1236 | goto error_snapshot_output; | |
1237 | } | |
1238 | } else if (!strcmp((const char *) node->name, | |
1239 | config_element_max_size)) { | |
1240 | xmlChar *content = xmlNodeGetContent(node); | |
1241 | ||
1242 | /* max_size */ | |
1243 | if (!content) { | |
1244 | ret = -LTTNG_ERR_NOMEM; | |
1245 | goto error_snapshot_output; | |
1246 | } | |
1247 | ret = parse_uint(content, &max_size); | |
1248 | free(content); | |
1249 | if (ret) { | |
1250 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1251 | goto error_snapshot_output; | |
1252 | } | |
1253 | } else { | |
1254 | /* consumer_output */ | |
1255 | ret = process_consumer_output(node, &output); | |
1256 | if (ret) { | |
1257 | goto error_snapshot_output; | |
1258 | } | |
1259 | } | |
1260 | } | |
1261 | ||
21a3f144 JR |
1262 | control_uri = output.control_uri; |
1263 | data_uri = output.data_uri; | |
1264 | path = output.path; | |
1265 | ||
1b08cbce JR |
1266 | if (overrides) { |
1267 | if (overrides->path_url) { | |
1b08cbce | 1268 | path = overrides->path_url; |
21a3f144 JR |
1269 | /* Control/data_uri are null */ |
1270 | control_uri = NULL; | |
1271 | data_uri = NULL; | |
1b08cbce JR |
1272 | } else { |
1273 | if (overrides->ctrl_url) { | |
1b08cbce | 1274 | control_uri = overrides->ctrl_url; |
21a3f144 JR |
1275 | /* path is null */ |
1276 | path = NULL; | |
1b08cbce JR |
1277 | } |
1278 | if (overrides->data_url) { | |
1b08cbce | 1279 | data_uri = overrides->data_url; |
21a3f144 JR |
1280 | /* path is null */ |
1281 | path = NULL; | |
1b08cbce JR |
1282 | } |
1283 | } | |
1b08cbce JR |
1284 | } |
1285 | ||
dcf266c0 JG |
1286 | snapshot_output = lttng_snapshot_output_create(); |
1287 | if (!snapshot_output) { | |
1288 | ret = -LTTNG_ERR_NOMEM; | |
1289 | goto error_snapshot_output; | |
1290 | } | |
1291 | ||
1292 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1293 | if (ret) { | |
1294 | goto error_snapshot_output; | |
1295 | } | |
1296 | ||
1297 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1298 | if (ret) { | |
1299 | goto error_snapshot_output; | |
1300 | } | |
1301 | ||
1b08cbce JR |
1302 | if (path) { |
1303 | ret = lttng_snapshot_output_set_ctrl_url(path, | |
dcf266c0 JG |
1304 | snapshot_output); |
1305 | if (ret) { | |
1306 | goto error_snapshot_output; | |
1307 | } | |
1308 | } else { | |
1b08cbce JR |
1309 | if (control_uri) { |
1310 | ret = lttng_snapshot_output_set_ctrl_url(control_uri, | |
dcf266c0 JG |
1311 | snapshot_output); |
1312 | if (ret) { | |
1313 | goto error_snapshot_output; | |
1314 | } | |
1315 | } | |
1316 | ||
1b08cbce JR |
1317 | if (data_uri) { |
1318 | ret = lttng_snapshot_output_set_data_url(data_uri, | |
dcf266c0 JG |
1319 | snapshot_output); |
1320 | if (ret) { | |
1321 | goto error_snapshot_output; | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1327 | error_snapshot_output: | |
1328 | free(name); | |
1329 | free(output.path); | |
1330 | free(output.control_uri); | |
1331 | free(output.data_uri); | |
1332 | lttng_snapshot_output_destroy(snapshot_output); | |
1333 | if (ret) { | |
1334 | goto end; | |
1335 | } | |
1336 | } | |
1337 | end: | |
1338 | return ret; | |
1339 | } | |
1340 | ||
1341 | static | |
1342 | int create_session(const char *name, | |
1343 | struct lttng_domain *kernel_domain, | |
1344 | struct lttng_domain *ust_domain, | |
1345 | struct lttng_domain *jul_domain, | |
5cdb6027 | 1346 | struct lttng_domain *log4j_domain, |
dcf266c0 | 1347 | xmlNodePtr output_node, |
1b08cbce JR |
1348 | uint64_t live_timer_interval, |
1349 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1350 | { |
1351 | int ret; | |
1352 | struct consumer_output output = { 0 }; | |
1353 | xmlNodePtr consumer_output_node; | |
1b08cbce JR |
1354 | const char *control_uri = NULL; |
1355 | const char *data_uri = NULL; | |
1356 | const char *path = NULL; | |
dcf266c0 JG |
1357 | |
1358 | assert(name); | |
dcf266c0 JG |
1359 | |
1360 | if (output_node) { | |
1361 | consumer_output_node = xmlFirstElementChild(output_node); | |
1362 | if (!consumer_output_node) { | |
1363 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1364 | goto end; | |
1365 | } | |
1366 | ||
1367 | if (strcmp((const char *) consumer_output_node->name, | |
1368 | config_element_consumer_output)) { | |
1369 | WARN("Invalid output type, expected %s node", | |
1370 | config_element_consumer_output); | |
1371 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1372 | goto end; | |
1373 | } | |
1374 | ||
1375 | ret = process_consumer_output(consumer_output_node, &output); | |
1376 | if (ret) { | |
1377 | goto end; | |
1378 | } | |
1379 | } | |
1380 | ||
21a3f144 JR |
1381 | control_uri = output.control_uri; |
1382 | data_uri = output.data_uri; | |
1383 | path = output.path; | |
1384 | ||
1b08cbce JR |
1385 | /* Check for override and apply them */ |
1386 | if (overrides) { | |
1387 | if (overrides->path_url) { | |
1b08cbce | 1388 | path = overrides->path_url; |
21a3f144 JR |
1389 | /* control/data_uri are null */; |
1390 | control_uri = NULL; | |
1391 | data_uri = NULL; | |
1b08cbce JR |
1392 | } else { |
1393 | if (overrides->ctrl_url) { | |
1b08cbce | 1394 | control_uri = overrides->ctrl_url; |
21a3f144 JR |
1395 | /* path is null */ |
1396 | path = NULL; | |
1b08cbce JR |
1397 | } |
1398 | if (overrides->data_url) { | |
1b08cbce | 1399 | data_uri = overrides->data_url; |
21a3f144 JR |
1400 | /* path is null */ |
1401 | path = NULL; | |
1b08cbce JR |
1402 | } |
1403 | } | |
1b08cbce JR |
1404 | } |
1405 | ||
21a3f144 | 1406 | |
1b08cbce | 1407 | if (live_timer_interval != UINT64_MAX && !control_uri && !data_uri) { |
dcf266c0 JG |
1408 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
1409 | goto end; | |
1410 | } | |
1411 | ||
1b08cbce | 1412 | if (control_uri || data_uri) { |
dcf266c0 JG |
1413 | /* network destination */ |
1414 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1415 | /* |
1416 | * URLs are provided for sure since the test above make sure that | |
1417 | * with a live timer the data and control URIs are provided. So, | |
1418 | * NULL is passed here and will be set right after. | |
1419 | */ | |
1420 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1421 | } else { |
1422 | ret = lttng_create_session(name, NULL); | |
1423 | } | |
1424 | if (ret) { | |
1425 | goto end; | |
1426 | } | |
1427 | ||
1b08cbce | 1428 | ret = create_session_net_output(name, control_uri, data_uri); |
95681498 JG |
1429 | if (ret) { |
1430 | goto end; | |
dcf266c0 | 1431 | } |
95681498 | 1432 | |
dcf266c0 JG |
1433 | } else { |
1434 | /* either local output or no output */ | |
1b08cbce | 1435 | ret = lttng_create_session(name, path); |
dcf266c0 JG |
1436 | if (ret) { |
1437 | goto end; | |
1438 | } | |
1439 | } | |
1440 | end: | |
1441 | free(output.path); | |
1442 | free(output.control_uri); | |
1443 | free(output.data_uri); | |
1444 | return ret; | |
1445 | } | |
1446 | static | |
1447 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1448 | struct lttng_event_probe_attr *attr) | |
1449 | { | |
1450 | int ret; | |
1451 | ||
1452 | assert(probe_attribute_node); | |
1453 | assert(attr); | |
1454 | ||
1455 | if (!strcmp((const char *) probe_attribute_node->name, | |
1456 | config_element_address)) { | |
1457 | xmlChar *content; | |
1458 | uint64_t addr = 0; | |
1459 | ||
1460 | /* addr */ | |
1461 | content = xmlNodeGetContent(probe_attribute_node); | |
1462 | if (!content) { | |
1463 | ret = -LTTNG_ERR_NOMEM; | |
1464 | goto end; | |
1465 | } | |
1466 | ||
1467 | ret = parse_uint(content, &addr); | |
1468 | free(content); | |
1469 | if (ret) { | |
1470 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1471 | goto end; | |
1472 | } | |
1473 | ||
1474 | attr->addr = addr; | |
1475 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1476 | config_element_offset)) { | |
1477 | xmlChar *content; | |
1478 | uint64_t offset = 0; | |
1479 | ||
1480 | /* offset */ | |
1481 | content = xmlNodeGetContent(probe_attribute_node); | |
1482 | if (!content) { | |
1483 | ret = -LTTNG_ERR_NOMEM; | |
1484 | goto end; | |
1485 | } | |
1486 | ||
1487 | ret = parse_uint(content, &offset); | |
1488 | free(content); | |
1489 | if (ret) { | |
1490 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1491 | goto end; | |
1492 | } | |
1493 | ||
1494 | attr->offset = offset; | |
1495 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1496 | config_element_symbol_name)) { | |
1497 | xmlChar *content; | |
1498 | size_t name_len; | |
1499 | ||
1500 | /* symbol_name */ | |
1501 | content = xmlNodeGetContent(probe_attribute_node); | |
1502 | if (!content) { | |
1503 | ret = -LTTNG_ERR_NOMEM; | |
1504 | goto end; | |
1505 | } | |
1506 | ||
1507 | name_len = strlen((char *) content); | |
1508 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1509 | WARN("symbol_name too long."); | |
1510 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1511 | free(content); | |
1512 | goto end; | |
1513 | } | |
1514 | ||
1515 | strncpy(attr->symbol_name, (const char *) content, name_len); | |
1516 | free(content); | |
1517 | } | |
1518 | ret = 0; | |
1519 | end: | |
1520 | return ret; | |
1521 | } | |
1522 | ||
1523 | static | |
1524 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
d7b645e2 | 1525 | const char *channel_name, const enum process_event_node_phase phase) |
dcf266c0 | 1526 | { |
d7b645e2 | 1527 | int ret = 0, i; |
dcf266c0 JG |
1528 | xmlNodePtr node; |
1529 | struct lttng_event event; | |
1530 | char **exclusions = NULL; | |
1531 | unsigned long exclusion_count = 0; | |
1532 | char *filter_expression = NULL; | |
1533 | ||
1534 | assert(event_node); | |
1535 | assert(handle); | |
1536 | assert(channel_name); | |
1537 | ||
1538 | memset(&event, 0, sizeof(event)); | |
1539 | ||
f40eba3d JG |
1540 | /* Initialize default log level which varies by domain */ |
1541 | switch (handle->domain.type) | |
1542 | { | |
1543 | case LTTNG_DOMAIN_JUL: | |
1544 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; | |
1545 | break; | |
1546 | case LTTNG_DOMAIN_LOG4J: | |
1547 | event.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; | |
1548 | break; | |
1549 | case LTTNG_DOMAIN_PYTHON: | |
1550 | event.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; | |
1551 | break; | |
1552 | case LTTNG_DOMAIN_UST: | |
1553 | case LTTNG_DOMAIN_KERNEL: | |
1554 | event.loglevel = LTTNG_LOGLEVEL_DEBUG; | |
1555 | break; | |
1556 | default: | |
1557 | assert(0); | |
1558 | } | |
1559 | ||
dcf266c0 JG |
1560 | for (node = xmlFirstElementChild(event_node); node; |
1561 | node = xmlNextElementSibling(node)) { | |
1562 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1563 | xmlChar *content; | |
1564 | size_t name_len; | |
1565 | ||
1566 | /* name */ | |
1567 | content = xmlNodeGetContent(node); | |
1568 | if (!content) { | |
1569 | ret = -LTTNG_ERR_NOMEM; | |
1570 | goto end; | |
1571 | } | |
1572 | ||
1573 | name_len = strlen((char *) content); | |
1574 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1575 | WARN("Channel name too long."); | |
1576 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1577 | free(content); | |
1578 | goto end; | |
1579 | } | |
1580 | ||
1581 | strncpy(event.name, (const char *) content, name_len); | |
1582 | free(content); | |
1583 | } else if (!strcmp((const char *) node->name, | |
1584 | config_element_enabled)) { | |
1585 | xmlChar *content = xmlNodeGetContent(node); | |
1586 | ||
1587 | /* enabled */ | |
1588 | if (!content) { | |
1589 | ret = -LTTNG_ERR_NOMEM; | |
1590 | goto end; | |
1591 | } | |
1592 | ||
1593 | ret = parse_bool(content, &event.enabled); | |
1594 | free(content); | |
1595 | if (ret) { | |
1596 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1597 | goto end; | |
1598 | } | |
1599 | } else if (!strcmp((const char *) node->name, | |
1600 | config_element_type)) { | |
1601 | xmlChar *content = xmlNodeGetContent(node); | |
1602 | ||
1603 | /* type */ | |
1604 | if (!content) { | |
1605 | ret = -LTTNG_ERR_NOMEM; | |
1606 | goto end; | |
1607 | } | |
1608 | ||
1609 | ret = get_event_type(content); | |
1610 | free(content); | |
1611 | if (ret < 0) { | |
1612 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1613 | goto end; | |
1614 | } | |
1615 | ||
1616 | event.type = ret; | |
1617 | } else if (!strcmp((const char *) node->name, | |
1618 | config_element_loglevel_type)) { | |
1619 | xmlChar *content = xmlNodeGetContent(node); | |
1620 | ||
1621 | /* loglevel_type */ | |
1622 | if (!content) { | |
1623 | ret = -LTTNG_ERR_NOMEM; | |
1624 | goto end; | |
1625 | } | |
1626 | ||
1627 | ret = get_loglevel_type(content); | |
1628 | free(content); | |
1629 | if (ret < 0) { | |
1630 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1631 | goto end; | |
1632 | } | |
1633 | ||
1634 | event.loglevel_type = ret; | |
1635 | } else if (!strcmp((const char *) node->name, | |
1636 | config_element_loglevel)) { | |
1637 | xmlChar *content; | |
1638 | int64_t loglevel = 0; | |
1639 | ||
1640 | /* loglevel */ | |
1641 | content = xmlNodeGetContent(node); | |
1642 | if (!content) { | |
1643 | ret = -LTTNG_ERR_NOMEM; | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | ret = parse_int(content, &loglevel); | |
1648 | free(content); | |
1649 | if (ret) { | |
1650 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1651 | goto end; | |
1652 | } | |
1653 | ||
1654 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1655 | WARN("loglevel out of range."); | |
1656 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1657 | goto end; | |
1658 | } | |
1659 | ||
1660 | event.loglevel = loglevel; | |
1661 | } else if (!strcmp((const char *) node->name, | |
1662 | config_element_filter)) { | |
1663 | xmlChar *content = | |
1664 | xmlNodeGetContent(node); | |
1665 | ||
1666 | /* filter */ | |
1667 | if (!content) { | |
1668 | ret = -LTTNG_ERR_NOMEM; | |
1669 | goto end; | |
1670 | } | |
1671 | ||
02d8ac3d | 1672 | free(filter_expression); |
dcf266c0 JG |
1673 | filter_expression = strdup((char *) content); |
1674 | free(content); | |
1675 | if (!filter_expression) { | |
1676 | ret = -LTTNG_ERR_NOMEM; | |
1677 | goto end; | |
1678 | } | |
1679 | } else if (!strcmp((const char *) node->name, | |
1680 | config_element_exclusions)) { | |
1681 | xmlNodePtr exclusion_node; | |
1682 | int exclusion_index = 0; | |
1683 | ||
1684 | /* exclusions */ | |
1685 | if (exclusions) { | |
1686 | /* | |
1687 | * Exclusions has already been initialized, | |
1688 | * invalid file. | |
1689 | */ | |
1690 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1691 | goto end; | |
1692 | } | |
1693 | ||
1694 | exclusion_count = xmlChildElementCount(node); | |
1695 | if (!exclusion_count) { | |
1696 | continue; | |
1697 | } | |
1698 | ||
1699 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1700 | if (!exclusions) { | |
1701 | exclusion_count = 0; | |
1702 | ret = -LTTNG_ERR_NOMEM; | |
1703 | goto end; | |
1704 | } | |
1705 | ||
1706 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1707 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1708 | xmlChar *content = | |
1709 | xmlNodeGetContent(exclusion_node); | |
1710 | ||
1711 | if (!content) { | |
1712 | ret = -LTTNG_ERR_NOMEM; | |
1713 | goto end; | |
1714 | } | |
1715 | ||
1716 | exclusions[exclusion_index] = strdup((const char *) content); | |
1717 | free(content); | |
1718 | if (!exclusions[exclusion_index]) { | |
1719 | ret = -LTTNG_ERR_NOMEM; | |
1720 | goto end; | |
1721 | } | |
1722 | exclusion_index++; | |
1723 | } | |
1724 | ||
1725 | event.exclusion = 1; | |
1726 | } else if (!strcmp((const char *) node->name, | |
1727 | config_element_attributes)) { | |
1728 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1729 | ||
1730 | /* attributes */ | |
1731 | if (!attribute_node) { | |
1732 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1733 | goto end; | |
1734 | } | |
1735 | ||
1736 | if (!strcmp((const char *) node->name, | |
1737 | config_element_probe_attributes)) { | |
1738 | xmlNodePtr probe_attribute_node; | |
1739 | ||
1740 | /* probe_attributes */ | |
1741 | for (probe_attribute_node = | |
1742 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
1743 | probe_attribute_node = xmlNextElementSibling( | |
1744 | probe_attribute_node)) { | |
1745 | ||
1746 | ret = process_probe_attribute_node(probe_attribute_node, | |
1747 | &event.attr.probe); | |
1748 | if (ret) { | |
1749 | goto end; | |
1750 | } | |
1751 | } | |
1752 | } else { | |
1753 | size_t sym_len; | |
1754 | xmlChar *content; | |
1755 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
1756 | ||
1757 | /* function_attributes */ | |
1758 | content = xmlNodeGetContent(symbol_node); | |
1759 | if (!content) { | |
1760 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1761 | goto end; | |
1762 | } | |
1763 | ||
1764 | sym_len = strlen((char *) content); | |
1765 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1766 | WARN("Function name too long."); | |
1767 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1768 | free(content); | |
1769 | goto end; | |
1770 | } | |
1771 | ||
1772 | strncpy(event.attr.ftrace.symbol_name, (char *) content, | |
1773 | sym_len); | |
1774 | free(content); | |
1775 | } | |
1776 | } | |
1777 | } | |
1778 | ||
d7b645e2 JR |
1779 | if ((event.enabled && phase == ENABLE) || phase == CREATION) { |
1780 | ret = lttng_enable_event_with_exclusions(handle, &event, channel_name, | |
1781 | filter_expression, exclusion_count, exclusions); | |
1782 | if (ret < 0) { | |
1783 | WARN("Enabling event (name:%s) on load failed.", event.name); | |
1784 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1785 | goto end; | |
1786 | } | |
065321e9 | 1787 | } |
dcf266c0 JG |
1788 | end: |
1789 | for (i = 0; i < exclusion_count; i++) { | |
1790 | free(exclusions[i]); | |
1791 | } | |
1792 | ||
1793 | free(exclusions); | |
1794 | free(filter_expression); | |
1795 | return ret; | |
1796 | } | |
1797 | ||
1798 | static | |
1799 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
1800 | const char *channel_name) | |
1801 | { | |
1802 | int ret = 0; | |
d7b645e2 | 1803 | struct lttng_event event; |
dcf266c0 JG |
1804 | xmlNodePtr node; |
1805 | ||
1806 | assert(events_node); | |
1807 | assert(handle); | |
1808 | assert(channel_name); | |
1809 | ||
1810 | for (node = xmlFirstElementChild(events_node); node; | |
1811 | node = xmlNextElementSibling(node)) { | |
d7b645e2 | 1812 | ret = process_event_node(node, handle, channel_name, CREATION); |
dcf266c0 JG |
1813 | if (ret) { |
1814 | goto end; | |
1815 | } | |
1816 | } | |
d7b645e2 JR |
1817 | |
1818 | /* | |
1819 | * Disable all events to enable only the necessary events. | |
1820 | * Limitations regarding lttng_disable_events and tuple descriptor | |
1821 | * force this approach. | |
1822 | */ | |
1823 | memset(&event, 0, sizeof(event)); | |
1824 | event.loglevel = -1; | |
1825 | event.type = LTTNG_EVENT_ALL; | |
1826 | ret = lttng_disable_event_ext(handle, &event, channel_name, NULL); | |
1827 | if (ret) { | |
1828 | goto end; | |
1829 | } | |
1830 | ||
1831 | for (node = xmlFirstElementChild(events_node); node; | |
1832 | node = xmlNextElementSibling(node)) { | |
1833 | ret = process_event_node(node, handle, channel_name, ENABLE); | |
1834 | if (ret) { | |
1835 | goto end; | |
1836 | } | |
1837 | } | |
1838 | ||
dcf266c0 JG |
1839 | end: |
1840 | return ret; | |
1841 | } | |
1842 | ||
1843 | static | |
1844 | int process_channel_attr_node(xmlNodePtr attr_node, | |
1845 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
1846 | xmlNodePtr *events_node) | |
1847 | { | |
1848 | int ret; | |
1849 | ||
1850 | assert(attr_node); | |
1851 | assert(channel); | |
1852 | assert(contexts_node); | |
1853 | assert(events_node); | |
1854 | ||
1855 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
1856 | xmlChar *content; | |
1857 | size_t name_len; | |
1858 | ||
1859 | /* name */ | |
1860 | content = xmlNodeGetContent(attr_node); | |
1861 | if (!content) { | |
1862 | ret = -LTTNG_ERR_NOMEM; | |
1863 | goto end; | |
1864 | } | |
1865 | ||
1866 | name_len = strlen((char *) content); | |
1867 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
1868 | WARN("Channel name too long."); | |
1869 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1870 | free(content); | |
1871 | goto end; | |
1872 | } | |
1873 | ||
1874 | strncpy(channel->name, (const char *) content, name_len); | |
1875 | free(content); | |
1876 | } else if (!strcmp((const char *) attr_node->name, | |
1877 | config_element_enabled)) { | |
1878 | xmlChar *content; | |
1879 | int enabled; | |
1880 | ||
1881 | /* enabled */ | |
1882 | content = xmlNodeGetContent(attr_node); | |
1883 | if (!content) { | |
1884 | ret = -LTTNG_ERR_NOMEM; | |
1885 | goto end; | |
1886 | } | |
1887 | ||
1888 | ret = parse_bool(content, &enabled); | |
1889 | free(content); | |
1890 | if (ret) { | |
1891 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1892 | goto end; | |
1893 | } | |
1894 | ||
1895 | channel->enabled = enabled; | |
1896 | } else if (!strcmp((const char *) attr_node->name, | |
1897 | config_element_overwrite_mode)) { | |
1898 | xmlChar *content; | |
1899 | ||
1900 | /* overwrite_mode */ | |
1901 | content = xmlNodeGetContent(attr_node); | |
1902 | if (!content) { | |
1903 | ret = -LTTNG_ERR_NOMEM; | |
1904 | goto end; | |
1905 | } | |
1906 | ||
1907 | ret = get_overwrite_mode(content); | |
1908 | free(content); | |
1909 | if (ret < 0) { | |
1910 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1911 | goto end; | |
1912 | } | |
1913 | ||
1914 | channel->attr.overwrite = ret; | |
1915 | } else if (!strcmp((const char *) attr_node->name, | |
1916 | config_element_subbuf_size)) { | |
1917 | xmlChar *content; | |
1918 | ||
1919 | /* subbuffer_size */ | |
1920 | content = xmlNodeGetContent(attr_node); | |
1921 | if (!content) { | |
1922 | ret = -LTTNG_ERR_NOMEM; | |
1923 | goto end; | |
1924 | } | |
1925 | ||
1926 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
1927 | free(content); | |
1928 | if (ret) { | |
1929 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1930 | goto end; | |
1931 | } | |
1932 | } else if (!strcmp((const char *) attr_node->name, | |
1933 | config_element_num_subbuf)) { | |
1934 | xmlChar *content; | |
1935 | ||
1936 | /* subbuffer_count */ | |
1937 | content = xmlNodeGetContent(attr_node); | |
1938 | if (!content) { | |
1939 | ret = -LTTNG_ERR_NOMEM; | |
1940 | goto end; | |
1941 | } | |
1942 | ||
1943 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
1944 | free(content); | |
1945 | if (ret) { | |
1946 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1947 | goto end; | |
1948 | } | |
1949 | } else if (!strcmp((const char *) attr_node->name, | |
1950 | config_element_switch_timer_interval)) { | |
1951 | xmlChar *content; | |
1952 | uint64_t switch_timer_interval = 0; | |
1953 | ||
1954 | /* switch_timer_interval */ | |
1955 | content = xmlNodeGetContent(attr_node); | |
1956 | if (!content) { | |
1957 | ret = -LTTNG_ERR_NOMEM; | |
1958 | goto end; | |
1959 | } | |
1960 | ||
1961 | ret = parse_uint(content, &switch_timer_interval); | |
1962 | free(content); | |
1963 | if (ret) { | |
1964 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1965 | goto end; | |
1966 | } | |
1967 | ||
1968 | if (switch_timer_interval > UINT_MAX) { | |
1969 | WARN("switch_timer_interval out of range."); | |
1970 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1971 | goto end; | |
1972 | } | |
1973 | ||
1974 | channel->attr.switch_timer_interval = | |
1975 | switch_timer_interval; | |
1976 | } else if (!strcmp((const char *) attr_node->name, | |
1977 | config_element_read_timer_interval)) { | |
1978 | xmlChar *content; | |
1979 | uint64_t read_timer_interval = 0; | |
1980 | ||
1981 | /* read_timer_interval */ | |
1982 | content = xmlNodeGetContent(attr_node); | |
1983 | if (!content) { | |
1984 | ret = -LTTNG_ERR_NOMEM; | |
1985 | goto end; | |
1986 | } | |
1987 | ||
1988 | ret = parse_uint(content, &read_timer_interval); | |
1989 | free(content); | |
1990 | if (ret) { | |
1991 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1992 | goto end; | |
1993 | } | |
1994 | ||
1995 | if (read_timer_interval > UINT_MAX) { | |
1996 | WARN("read_timer_interval out of range."); | |
1997 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1998 | goto end; | |
1999 | } | |
2000 | ||
2001 | channel->attr.read_timer_interval = | |
2002 | read_timer_interval; | |
2003 | } else if (!strcmp((const char *) attr_node->name, | |
2004 | config_element_output_type)) { | |
2005 | xmlChar *content; | |
2006 | ||
2007 | /* output_type */ | |
2008 | content = xmlNodeGetContent(attr_node); | |
2009 | if (!content) { | |
2010 | ret = -LTTNG_ERR_NOMEM; | |
2011 | goto end; | |
2012 | } | |
2013 | ||
2014 | ret = get_output_type(content); | |
2015 | free(content); | |
2016 | if (ret < 0) { | |
2017 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2018 | goto end; | |
2019 | } | |
2020 | ||
2021 | channel->attr.output = ret; | |
2022 | } else if (!strcmp((const char *) attr_node->name, | |
2023 | config_element_tracefile_size)) { | |
2024 | xmlChar *content; | |
2025 | ||
2026 | /* tracefile_size */ | |
2027 | content = xmlNodeGetContent(attr_node); | |
2028 | if (!content) { | |
2029 | ret = -LTTNG_ERR_NOMEM; | |
2030 | goto end; | |
2031 | } | |
2032 | ||
2033 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
2034 | free(content); | |
2035 | if (ret) { | |
2036 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2037 | goto end; | |
2038 | } | |
2039 | } else if (!strcmp((const char *) attr_node->name, | |
2040 | config_element_tracefile_count)) { | |
2041 | xmlChar *content; | |
2042 | ||
2043 | /* tracefile_count */ | |
2044 | content = xmlNodeGetContent(attr_node); | |
2045 | if (!content) { | |
2046 | ret = -LTTNG_ERR_NOMEM; | |
2047 | goto end; | |
2048 | } | |
2049 | ||
2050 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
2051 | free(content); | |
2052 | if (ret) { | |
2053 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2054 | goto end; | |
2055 | } | |
2056 | } else if (!strcmp((const char *) attr_node->name, | |
2057 | config_element_live_timer_interval)) { | |
2058 | xmlChar *content; | |
2059 | uint64_t live_timer_interval = 0; | |
2060 | ||
2061 | /* live_timer_interval */ | |
2062 | content = xmlNodeGetContent(attr_node); | |
2063 | if (!content) { | |
2064 | ret = -LTTNG_ERR_NOMEM; | |
2065 | goto end; | |
2066 | } | |
2067 | ||
2068 | ret = parse_uint(content, &live_timer_interval); | |
2069 | free(content); | |
2070 | if (ret) { | |
2071 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2072 | goto end; | |
2073 | } | |
2074 | ||
2075 | if (live_timer_interval > UINT_MAX) { | |
2076 | WARN("live_timer_interval out of range."); | |
2077 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2078 | goto end; | |
2079 | } | |
2080 | ||
2081 | channel->attr.live_timer_interval = | |
2082 | live_timer_interval; | |
2d37e6fa JR |
2083 | } else if (!strcmp((const char *) attr_node->name, |
2084 | config_element_monitor_timer_interval)) { | |
2085 | xmlChar *content; | |
2086 | uint64_t monitor_timer_interval = 0; | |
2087 | ||
2088 | /* monitor_timer_interval */ | |
2089 | content = xmlNodeGetContent(attr_node); | |
2090 | if (!content) { | |
2091 | ret = -LTTNG_ERR_NOMEM; | |
2092 | goto end; | |
2093 | } | |
2094 | ||
2095 | ret = parse_uint(content, &monitor_timer_interval); | |
2096 | free(content); | |
2097 | if (ret) { | |
2098 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2099 | goto end; | |
2100 | } | |
2101 | ||
2102 | ret = lttng_channel_set_monitor_timer_interval(channel, | |
2103 | monitor_timer_interval); | |
2104 | if (ret) { | |
2105 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2106 | goto end; | |
2107 | } | |
75e101d4 JR |
2108 | } else if (!strcmp((const char *) attr_node->name, |
2109 | config_element_blocking_timeout)) { | |
2110 | xmlChar *content; | |
2111 | int64_t blocking_timeout = 0; | |
2112 | ||
2113 | /* blocking_timeout */ | |
2114 | content = xmlNodeGetContent(attr_node); | |
2115 | if (!content) { | |
2116 | ret = -LTTNG_ERR_NOMEM; | |
2117 | goto end; | |
2118 | } | |
2119 | ||
2120 | ret = parse_int(content, &blocking_timeout); | |
2121 | free(content); | |
2122 | if (ret) { | |
2123 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2124 | goto end; | |
2125 | } | |
2126 | ||
2127 | ret = lttng_channel_set_blocking_timeout(channel, | |
2128 | blocking_timeout); | |
2129 | if (ret) { | |
2130 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2131 | goto end; | |
2132 | } | |
dcf266c0 JG |
2133 | } else if (!strcmp((const char *) attr_node->name, |
2134 | config_element_events)) { | |
2135 | /* events */ | |
2136 | *events_node = attr_node; | |
2137 | } else { | |
2138 | /* contexts */ | |
2139 | *contexts_node = attr_node; | |
2140 | } | |
2141 | ret = 0; | |
2142 | end: | |
2143 | return ret; | |
2144 | } | |
2145 | ||
2146 | static | |
2147 | int process_context_node(xmlNodePtr context_node, | |
2148 | struct lttng_handle *handle, const char *channel_name) | |
2149 | { | |
2150 | int ret; | |
2151 | struct lttng_event_context context; | |
2152 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
2153 | ||
2154 | assert(handle); | |
2155 | assert(channel_name); | |
2156 | ||
2157 | if (!context_child_node) { | |
2158 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2159 | goto end; | |
2160 | } | |
2161 | ||
2162 | memset(&context, 0, sizeof(context)); | |
2163 | ||
2164 | if (!strcmp((const char *) context_child_node->name, | |
2165 | config_element_type)) { | |
2166 | /* type */ | |
2167 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
045fc617 | 2168 | |
dcf266c0 JG |
2169 | if (!content) { |
2170 | ret = -LTTNG_ERR_NOMEM; | |
2171 | goto end; | |
2172 | } | |
2173 | ||
2174 | ret = get_context_type(content); | |
2175 | free(content); | |
2176 | if (ret < 0) { | |
2177 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2178 | goto end; | |
2179 | } | |
2180 | ||
2181 | context.ctx = ret; | |
045fc617 JG |
2182 | } else if (!strcmp((const char *) context_child_node->name, |
2183 | config_element_context_perf)) { | |
2184 | /* perf */ | |
dcf266c0 JG |
2185 | xmlNodePtr perf_attr_node; |
2186 | ||
14ce5bd8 JG |
2187 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
2188 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
2189 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
2190 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
2191 | perf_attr_node; perf_attr_node = | |
2192 | xmlNextElementSibling(perf_attr_node)) { | |
2193 | if (!strcmp((const char *) perf_attr_node->name, | |
2194 | config_element_type)) { | |
2195 | xmlChar *content; | |
2196 | uint64_t type = 0; | |
2197 | ||
2198 | /* type */ | |
2199 | content = xmlNodeGetContent(perf_attr_node); | |
2200 | if (!content) { | |
2201 | ret = -LTTNG_ERR_NOMEM; | |
2202 | goto end; | |
2203 | } | |
2204 | ||
2205 | ret = parse_uint(content, &type); | |
2206 | free(content); | |
2207 | if (ret) { | |
2208 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2209 | goto end; | |
2210 | } | |
2211 | ||
2212 | if (type > UINT32_MAX) { | |
2213 | WARN("perf context type out of range."); | |
2214 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2215 | goto end; | |
2216 | } | |
2217 | ||
2218 | context.u.perf_counter.type = type; | |
2219 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2220 | config_element_config)) { | |
2221 | xmlChar *content; | |
2222 | uint64_t config = 0; | |
2223 | ||
2224 | /* config */ | |
2225 | content = xmlNodeGetContent(perf_attr_node); | |
2226 | if (!content) { | |
2227 | ret = -LTTNG_ERR_NOMEM; | |
2228 | goto end; | |
2229 | } | |
2230 | ||
2231 | ret = parse_uint(content, &config); | |
2232 | free(content); | |
2233 | if (ret) { | |
2234 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2235 | goto end; | |
2236 | } | |
2237 | ||
2238 | context.u.perf_counter.config = config; | |
2239 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2240 | config_element_name)) { | |
2241 | xmlChar *content; | |
2242 | size_t name_len; | |
2243 | ||
2244 | /* name */ | |
2245 | content = xmlNodeGetContent(perf_attr_node); | |
2246 | if (!content) { | |
2247 | ret = -LTTNG_ERR_NOMEM; | |
2248 | goto end; | |
2249 | } | |
2250 | ||
2251 | name_len = strlen((char *) content); | |
2252 | if (name_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2253 | WARN("perf context name too long."); | |
2254 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2255 | free(content); | |
2256 | goto end; | |
2257 | } | |
2258 | ||
2259 | strncpy(context.u.perf_counter.name, (const char *) content, | |
2260 | name_len); | |
2261 | free(content); | |
2262 | } | |
2263 | } | |
045fc617 JG |
2264 | } else if (!strcmp((const char *) context_child_node->name, |
2265 | config_element_context_app)) { | |
2266 | /* application context */ | |
2267 | xmlNodePtr app_ctx_node; | |
2268 | ||
2269 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
2270 | for (app_ctx_node = xmlFirstElementChild(context_child_node); | |
2271 | app_ctx_node; app_ctx_node = | |
2272 | xmlNextElementSibling(app_ctx_node)) { | |
2273 | xmlChar *content; | |
2274 | char **target = strcmp( | |
2275 | (const char *) app_ctx_node->name, | |
2276 | config_element_context_app_provider_name) == 0 ? | |
2277 | &context.u.app_ctx.provider_name : | |
2278 | &context.u.app_ctx.ctx_name; | |
2279 | ||
2280 | content = xmlNodeGetContent(app_ctx_node); | |
2281 | if (!content) { | |
2282 | ret = -LTTNG_ERR_NOMEM; | |
2283 | goto end; | |
2284 | } | |
2285 | ||
2286 | *target = (char *) content; | |
2287 | } | |
2288 | } else { | |
2289 | /* Unrecognized context type */ | |
2290 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2291 | goto end; | |
dcf266c0 JG |
2292 | } |
2293 | ||
2294 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
045fc617 JG |
2295 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2296 | free(context.u.app_ctx.provider_name); | |
2297 | free(context.u.app_ctx.ctx_name); | |
2298 | } | |
dcf266c0 JG |
2299 | end: |
2300 | return ret; | |
2301 | } | |
2302 | ||
2303 | static | |
2304 | int process_contexts_node(xmlNodePtr contexts_node, | |
2305 | struct lttng_handle *handle, const char *channel_name) | |
2306 | { | |
2307 | int ret = 0; | |
2308 | xmlNodePtr context_node; | |
2309 | ||
2310 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2311 | context_node = xmlNextElementSibling(context_node)) { | |
2312 | ret = process_context_node(context_node, handle, channel_name); | |
2313 | if (ret) { | |
2314 | goto end; | |
2315 | } | |
2316 | } | |
2317 | end: | |
2318 | return ret; | |
2319 | } | |
2320 | ||
847a5916 JR |
2321 | static |
2322 | int process_pid_tracker_node(xmlNodePtr pid_tracker_node, | |
2323 | struct lttng_handle *handle) | |
2324 | { | |
dd49e13f | 2325 | int ret = 0, child; |
847a5916 JR |
2326 | xmlNodePtr targets_node = NULL; |
2327 | xmlNodePtr node; | |
2328 | ||
2329 | assert(handle); | |
2330 | assert(pid_tracker_node); | |
2331 | /* get the targets node */ | |
2332 | for (node = xmlFirstElementChild(pid_tracker_node); node; | |
2333 | node = xmlNextElementSibling(node)) { | |
2334 | if (!strcmp((const char *) node->name, | |
2335 | config_element_targets)) { | |
2336 | targets_node = node; | |
2337 | break; | |
2338 | } | |
2339 | } | |
2340 | ||
2341 | if (!targets_node) { | |
2342 | ret = LTTNG_ERR_INVALID; | |
2343 | goto end; | |
2344 | } | |
2345 | ||
2346 | /* Go through all pid_target node */ | |
2347 | child = xmlChildElementCount(targets_node); | |
2348 | if (child == 0) { | |
2349 | /* The session is explicitly set to target nothing. */ | |
2350 | ret = lttng_untrack_pid(handle, -1); | |
2351 | if (ret) { | |
2352 | goto end; | |
2353 | } | |
2354 | } | |
2355 | for (node = xmlFirstElementChild(targets_node); node; | |
2356 | node = xmlNextElementSibling(node)) { | |
2357 | xmlNodePtr pid_target_node = node; | |
2358 | ||
2359 | /* get pid node and track it */ | |
2360 | for (node = xmlFirstElementChild(pid_target_node); node; | |
2361 | node = xmlNextElementSibling(node)) { | |
2362 | if (!strcmp((const char *) node->name, | |
2363 | config_element_pid)) { | |
2364 | int64_t pid; | |
2365 | xmlChar *content = NULL; | |
2366 | ||
2367 | content = xmlNodeGetContent(node); | |
2368 | if (!content) { | |
2369 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2370 | goto end; | |
2371 | } | |
2372 | ||
2373 | ret = parse_int(content, &pid); | |
2374 | free(content); | |
2375 | if (ret) { | |
2376 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2377 | goto end; | |
2378 | } | |
2379 | ||
2380 | ret = lttng_track_pid(handle, (int) pid); | |
2381 | if (ret) { | |
2382 | goto end; | |
2383 | } | |
2384 | } | |
2385 | } | |
2386 | node = pid_target_node; | |
2387 | } | |
2388 | ||
2389 | end: | |
2390 | return ret; | |
2391 | } | |
2392 | ||
dcf266c0 JG |
2393 | static |
2394 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2395 | { | |
2396 | int ret; | |
2397 | struct lttng_domain domain = { 0 }; | |
2398 | struct lttng_handle *handle = NULL; | |
2d37e6fa | 2399 | struct lttng_channel *channel = NULL; |
dcf266c0 | 2400 | xmlNodePtr channels_node = NULL; |
847a5916 JR |
2401 | xmlNodePtr trackers_node = NULL; |
2402 | xmlNodePtr pid_tracker_node = NULL; | |
dcf266c0 JG |
2403 | xmlNodePtr node; |
2404 | ||
2405 | assert(session_name); | |
2406 | ||
2407 | ret = init_domain(domain_node, &domain); | |
2408 | if (ret) { | |
2409 | goto end; | |
2410 | } | |
2411 | ||
2412 | handle = lttng_create_handle(session_name, &domain); | |
2413 | if (!handle) { | |
2414 | ret = -LTTNG_ERR_NOMEM; | |
2415 | goto end; | |
2416 | } | |
2417 | ||
2418 | /* get the channels node */ | |
2419 | for (node = xmlFirstElementChild(domain_node); node; | |
2420 | node = xmlNextElementSibling(node)) { | |
2421 | if (!strcmp((const char *) node->name, | |
2422 | config_element_channels)) { | |
2423 | channels_node = node; | |
2424 | break; | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | if (!channels_node) { | |
2429 | goto end; | |
2430 | } | |
2431 | ||
2432 | /* create all channels */ | |
2433 | for (node = xmlFirstElementChild(channels_node); node; | |
2434 | node = xmlNextElementSibling(node)) { | |
a76e73b4 | 2435 | const enum lttng_domain_type original_domain = domain.type; |
dcf266c0 JG |
2436 | xmlNodePtr contexts_node = NULL; |
2437 | xmlNodePtr events_node = NULL; | |
2438 | xmlNodePtr channel_attr_node; | |
2439 | ||
a76e73b4 JG |
2440 | /* |
2441 | * Channels of the "agent" types cannot be created directly. | |
2442 | * They are meant to be created implicitly through the | |
2443 | * activation of events in their domain. However, a user | |
2444 | * can override the default channel configuration attributes | |
2445 | * by creating the underlying UST channel _before_ enabling | |
2446 | * an agent domain event. | |
2447 | * | |
2448 | * Hence, the channel's type is substituted before the creation | |
2449 | * and restored by the time the events are created. | |
2450 | */ | |
2451 | switch (domain.type) { | |
2452 | case LTTNG_DOMAIN_JUL: | |
2453 | case LTTNG_DOMAIN_LOG4J: | |
2454 | case LTTNG_DOMAIN_PYTHON: | |
2455 | domain.type = LTTNG_DOMAIN_UST; | |
2456 | default: | |
2457 | break; | |
2458 | } | |
2459 | ||
2d37e6fa JR |
2460 | channel = lttng_channel_create(&domain); |
2461 | if (!channel) { | |
2462 | ret = -1; | |
2463 | goto end; | |
2464 | } | |
dcf266c0 JG |
2465 | |
2466 | for (channel_attr_node = xmlFirstElementChild(node); | |
2467 | channel_attr_node; channel_attr_node = | |
2468 | xmlNextElementSibling(channel_attr_node)) { | |
2469 | ret = process_channel_attr_node(channel_attr_node, | |
2d37e6fa | 2470 | channel, &contexts_node, &events_node); |
dcf266c0 JG |
2471 | if (ret) { |
2472 | goto end; | |
2473 | } | |
2474 | } | |
2475 | ||
2d37e6fa | 2476 | ret = lttng_enable_channel(handle, channel); |
dcf266c0 JG |
2477 | if (ret < 0) { |
2478 | goto end; | |
2479 | } | |
2480 | ||
a76e73b4 JG |
2481 | /* Restore the original channel domain. */ |
2482 | domain.type = original_domain; | |
2483 | ||
2d37e6fa | 2484 | ret = process_events_node(events_node, handle, channel->name); |
dcf266c0 JG |
2485 | if (ret) { |
2486 | goto end; | |
2487 | } | |
2488 | ||
2489 | ret = process_contexts_node(contexts_node, handle, | |
2d37e6fa | 2490 | channel->name); |
dcf266c0 JG |
2491 | if (ret) { |
2492 | goto end; | |
2493 | } | |
2d37e6fa JR |
2494 | |
2495 | lttng_channel_destroy(channel); | |
dcf266c0 | 2496 | } |
2d37e6fa | 2497 | channel = NULL; |
847a5916 JR |
2498 | |
2499 | /* get the trackers node */ | |
2500 | for (node = xmlFirstElementChild(domain_node); node; | |
2501 | node = xmlNextElementSibling(node)) { | |
2502 | if (!strcmp((const char *) node->name, | |
2503 | config_element_trackers)) { | |
2504 | trackers_node = node; | |
2505 | break; | |
2506 | } | |
2507 | } | |
2508 | ||
2509 | if (!trackers_node) { | |
2510 | goto end; | |
2511 | } | |
2512 | ||
2513 | for (node = xmlFirstElementChild(trackers_node); node; | |
2514 | node = xmlNextElementSibling(node)) { | |
2515 | if (!strcmp((const char *)node->name,config_element_pid_tracker)) { | |
2516 | pid_tracker_node = node; | |
2517 | ret = process_pid_tracker_node(pid_tracker_node, handle); | |
2518 | if (ret) { | |
2519 | goto end; | |
2520 | } | |
2521 | } | |
2522 | } | |
2523 | ||
2524 | if (!pid_tracker_node) { | |
2525 | lttng_track_pid(handle, -1); | |
2526 | } | |
2527 | ||
dcf266c0 | 2528 | end: |
2d37e6fa | 2529 | lttng_channel_destroy(channel); |
dcf266c0 JG |
2530 | lttng_destroy_handle(handle); |
2531 | return ret; | |
2532 | } | |
2533 | ||
2534 | static | |
2535 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
1b08cbce JR |
2536 | int overwrite, |
2537 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2538 | { |
2539 | int ret, started = -1, snapshot_mode = -1; | |
2540 | uint64_t live_timer_interval = UINT64_MAX; | |
d324faf7 | 2541 | xmlChar *name = NULL; |
9e7c9f56 | 2542 | xmlChar *shm_path = NULL; |
dcf266c0 JG |
2543 | xmlNodePtr domains_node = NULL; |
2544 | xmlNodePtr output_node = NULL; | |
2545 | xmlNodePtr node; | |
2546 | struct lttng_domain *kernel_domain = NULL; | |
2547 | struct lttng_domain *ust_domain = NULL; | |
2548 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 2549 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 2550 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
2551 | |
2552 | for (node = xmlFirstElementChild(session_node); node; | |
2553 | node = xmlNextElementSibling(node)) { | |
2554 | if (!name && !strcmp((const char *) node->name, | |
2555 | config_element_name)) { | |
2556 | /* name */ | |
2557 | xmlChar *node_content = xmlNodeGetContent(node); | |
2558 | if (!node_content) { | |
2559 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2560 | goto error; |
dcf266c0 JG |
2561 | } |
2562 | ||
d324faf7 | 2563 | name = node_content; |
dcf266c0 JG |
2564 | } else if (!domains_node && !strcmp((const char *) node->name, |
2565 | config_element_domains)) { | |
2566 | /* domains */ | |
2567 | domains_node = node; | |
2568 | } else if (started == -1 && !strcmp((const char *) node->name, | |
2569 | config_element_started)) { | |
2570 | /* started */ | |
2571 | xmlChar *node_content = xmlNodeGetContent(node); | |
2572 | if (!node_content) { | |
2573 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2574 | goto error; |
dcf266c0 JG |
2575 | } |
2576 | ||
2577 | ret = parse_bool(node_content, &started); | |
2578 | free(node_content); | |
2579 | if (ret) { | |
2580 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2581 | goto error; |
dcf266c0 JG |
2582 | } |
2583 | } else if (!output_node && !strcmp((const char *) node->name, | |
2584 | config_element_output)) { | |
2585 | /* output */ | |
2586 | output_node = node; | |
9e7c9f56 JR |
2587 | } else if (!shm_path && !strcmp((const char *) node->name, |
2588 | config_element_shared_memory_path)) { | |
2589 | /* shared memory path */ | |
2590 | xmlChar *node_content = xmlNodeGetContent(node); | |
2591 | if (!node_content) { | |
2592 | ret = -LTTNG_ERR_NOMEM; | |
2593 | goto error; | |
2594 | } | |
2595 | ||
2596 | shm_path = node_content; | |
dcf266c0 JG |
2597 | } else { |
2598 | /* attributes, snapshot_mode or live_timer_interval */ | |
2599 | xmlNodePtr attributes_child = | |
2600 | xmlFirstElementChild(node); | |
2601 | ||
2602 | if (!strcmp((const char *) attributes_child->name, | |
2603 | config_element_snapshot_mode)) { | |
2604 | /* snapshot_mode */ | |
2605 | xmlChar *snapshot_mode_content = | |
2606 | xmlNodeGetContent(attributes_child); | |
2607 | if (!snapshot_mode_content) { | |
2608 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2609 | goto error; |
dcf266c0 JG |
2610 | } |
2611 | ||
2612 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); | |
2613 | free(snapshot_mode_content); | |
2614 | if (ret) { | |
2615 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2616 | goto error; |
dcf266c0 JG |
2617 | } |
2618 | } else { | |
2619 | /* live_timer_interval */ | |
2620 | xmlChar *timer_interval_content = | |
2621 | xmlNodeGetContent(attributes_child); | |
2622 | if (!timer_interval_content) { | |
2623 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2624 | goto error; |
dcf266c0 JG |
2625 | } |
2626 | ||
2627 | ret = parse_uint(timer_interval_content, &live_timer_interval); | |
2628 | free(timer_interval_content); | |
2629 | if (ret) { | |
2630 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2631 | goto error; |
dcf266c0 JG |
2632 | } |
2633 | } | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | if (!name) { | |
2638 | /* Mandatory attribute, as defined in the session XSD */ | |
2639 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2640 | goto error; |
dcf266c0 JG |
2641 | } |
2642 | ||
d324faf7 | 2643 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 2644 | /* This is not the session we are looking for */ |
c2da8cde DG |
2645 | ret = -LTTNG_ERR_NO_SESSION; |
2646 | goto error; | |
dcf266c0 JG |
2647 | } |
2648 | ||
2649 | /* Init domains to create the session handles */ | |
2650 | for (node = xmlFirstElementChild(domains_node); node; | |
2651 | node = xmlNextElementSibling(node)) { | |
2652 | struct lttng_domain *domain; | |
2653 | ||
2654 | domain = zmalloc(sizeof(*domain)); | |
2655 | if (!domain) { | |
2656 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 2657 | goto error; |
dcf266c0 JG |
2658 | } |
2659 | ||
2660 | ret = init_domain(node, domain); | |
2661 | if (ret) { | |
2662 | goto domain_init_error; | |
2663 | } | |
2664 | ||
2665 | switch (domain->type) { | |
2666 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
2667 | if (kernel_domain) { |
2668 | /* Same domain seen twice, invalid! */ | |
2669 | goto domain_init_error; | |
2670 | } | |
dcf266c0 JG |
2671 | kernel_domain = domain; |
2672 | break; | |
2673 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
2674 | if (ust_domain) { |
2675 | /* Same domain seen twice, invalid! */ | |
2676 | goto domain_init_error; | |
2677 | } | |
dcf266c0 JG |
2678 | ust_domain = domain; |
2679 | break; | |
2680 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
2681 | if (jul_domain) { |
2682 | /* Same domain seen twice, invalid! */ | |
2683 | goto domain_init_error; | |
2684 | } | |
dcf266c0 JG |
2685 | jul_domain = domain; |
2686 | break; | |
5cdb6027 DG |
2687 | case LTTNG_DOMAIN_LOG4J: |
2688 | if (log4j_domain) { | |
2689 | /* Same domain seen twice, invalid! */ | |
2690 | goto domain_init_error; | |
2691 | } | |
2692 | log4j_domain = domain; | |
2693 | break; | |
0e115563 DG |
2694 | case LTTNG_DOMAIN_PYTHON: |
2695 | if (python_domain) { | |
2696 | /* Same domain seen twice, invalid! */ | |
2697 | goto domain_init_error; | |
2698 | } | |
2699 | python_domain = domain; | |
2700 | break; | |
dcf266c0 JG |
2701 | default: |
2702 | WARN("Invalid domain type"); | |
2703 | goto domain_init_error; | |
2704 | } | |
2705 | continue; | |
2706 | domain_init_error: | |
2707 | free(domain); | |
2708 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 2709 | goto error; |
dcf266c0 JG |
2710 | } |
2711 | ||
2aaf5fc7 JR |
2712 | /* Apply overrides */ |
2713 | if (overrides) { | |
2714 | if (overrides->session_name) { | |
2715 | xmlChar *name_override = xmlStrdup(BAD_CAST(overrides->session_name)); | |
2716 | if (!name_override) { | |
2717 | ret = -LTTNG_ERR_NOMEM; | |
2718 | goto error; | |
2719 | } | |
2720 | ||
2721 | /* Overrides the session name to the provided name */ | |
2722 | xmlFree(name); | |
2723 | name = name_override; | |
2724 | } | |
2725 | } | |
2726 | ||
40b4155f | 2727 | if (overwrite) { |
dcf266c0 | 2728 | /* Destroy session if it exists */ |
d324faf7 | 2729 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
2730 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
2731 | ERR("Failed to destroy existing session."); | |
c2da8cde | 2732 | goto error; |
dcf266c0 JG |
2733 | } |
2734 | } | |
2735 | ||
2736 | /* Create session type depending on output type */ | |
2737 | if (snapshot_mode && snapshot_mode != -1) { | |
1b08cbce JR |
2738 | ret = create_snapshot_session((const char *) name, output_node, |
2739 | overrides); | |
dcf266c0 JG |
2740 | } else if (live_timer_interval && |
2741 | live_timer_interval != UINT64_MAX) { | |
d324faf7 JG |
2742 | ret = create_session((const char *) name, kernel_domain, |
2743 | ust_domain, jul_domain, log4j_domain, | |
1b08cbce | 2744 | output_node, live_timer_interval, overrides); |
dcf266c0 JG |
2745 | } else { |
2746 | /* regular session */ | |
d324faf7 JG |
2747 | ret = create_session((const char *) name, kernel_domain, |
2748 | ust_domain, jul_domain, log4j_domain, | |
1b08cbce | 2749 | output_node, UINT64_MAX, overrides); |
dcf266c0 | 2750 | } |
dcf266c0 | 2751 | if (ret) { |
c2da8cde | 2752 | goto error; |
dcf266c0 JG |
2753 | } |
2754 | ||
9e7c9f56 JR |
2755 | if (shm_path) { |
2756 | ret = lttng_set_session_shm_path((const char *) name, | |
d324faf7 | 2757 | (const char *) shm_path); |
9e7c9f56 JR |
2758 | if (ret) { |
2759 | goto error; | |
2760 | } | |
2761 | } | |
2762 | ||
dcf266c0 JG |
2763 | for (node = xmlFirstElementChild(domains_node); node; |
2764 | node = xmlNextElementSibling(node)) { | |
d324faf7 | 2765 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
2766 | if (ret) { |
2767 | goto end; | |
2768 | } | |
2769 | } | |
2770 | ||
2771 | if (started) { | |
d324faf7 | 2772 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
2773 | if (ret) { |
2774 | goto end; | |
2775 | } | |
2776 | } | |
c2da8cde | 2777 | |
dcf266c0 | 2778 | end: |
b2579dc1 | 2779 | if (ret < 0) { |
d324faf7 JG |
2780 | ERR("Failed to load session %s: %s", (const char *) name, |
2781 | lttng_strerror(ret)); | |
2782 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
2783 | } |
2784 | ||
c2da8cde | 2785 | error: |
dcf266c0 JG |
2786 | free(kernel_domain); |
2787 | free(ust_domain); | |
2788 | free(jul_domain); | |
5cdb6027 | 2789 | free(log4j_domain); |
135a3893 | 2790 | free(python_domain); |
d324faf7 | 2791 | xmlFree(name); |
9e7c9f56 | 2792 | xmlFree(shm_path); |
dcf266c0 JG |
2793 | return ret; |
2794 | } | |
2795 | ||
cf53c06d DG |
2796 | /* |
2797 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
2798 | * Return -1 if the path is EPERM. | |
2799 | */ | |
2800 | static int validate_file_read_creds(const char *path) | |
2801 | { | |
2802 | int ret; | |
2803 | ||
2804 | assert(path); | |
2805 | ||
2806 | /* Can we read the file. */ | |
2807 | ret = access(path, R_OK); | |
2808 | if (!ret) { | |
2809 | goto valid; | |
2810 | } | |
2811 | if (errno == EACCES) { | |
2812 | return -1; | |
2813 | } else { | |
2814 | /* Invalid. */ | |
2815 | return 0; | |
2816 | } | |
2817 | valid: | |
2818 | return 1; | |
2819 | } | |
2820 | ||
dcf266c0 JG |
2821 | static |
2822 | int load_session_from_file(const char *path, const char *session_name, | |
1b08cbce JR |
2823 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
2824 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2825 | { |
2826 | int ret, session_found = !session_name; | |
2827 | xmlDocPtr doc = NULL; | |
2828 | xmlNodePtr sessions_node; | |
2829 | xmlNodePtr session_node; | |
dcf266c0 JG |
2830 | |
2831 | assert(path); | |
2832 | assert(validation_ctx); | |
2833 | ||
cf53c06d DG |
2834 | ret = validate_file_read_creds(path); |
2835 | if (ret != 1) { | |
2836 | if (ret == -1) { | |
2837 | ret = -LTTNG_ERR_EPERM; | |
2838 | } else { | |
2839 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2840 | } | |
dcf266c0 JG |
2841 | goto end; |
2842 | } | |
2843 | ||
2844 | doc = xmlParseFile(path); | |
2845 | if (!doc) { | |
2846 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
2847 | goto end; | |
2848 | } | |
2849 | ||
2850 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
2851 | if (ret) { | |
2852 | ERR("Session configuration file validation failed"); | |
2853 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2854 | goto end; | |
2855 | } | |
2856 | ||
2857 | sessions_node = xmlDocGetRootElement(doc); | |
2858 | if (!sessions_node) { | |
2859 | goto end; | |
2860 | } | |
2861 | ||
2862 | for (session_node = xmlFirstElementChild(sessions_node); | |
2863 | session_node; session_node = | |
2864 | xmlNextElementSibling(session_node)) { | |
2865 | ret = process_session_node(session_node, | |
1b08cbce | 2866 | session_name, overwrite, overrides); |
dcf266c0 JG |
2867 | if (session_name && ret == 0) { |
2868 | /* Target session found and loaded */ | |
2869 | session_found = 1; | |
2870 | break; | |
2871 | } | |
2872 | } | |
2873 | end: | |
2874 | xmlFreeDoc(doc); | |
2875 | if (!ret) { | |
a96bc65d | 2876 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
2877 | } |
2878 | return ret; | |
2879 | } | |
2880 | ||
60f70355 JG |
2881 | /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */ |
2882 | static | |
2883 | struct dirent *alloc_dirent(const char *path) | |
2884 | { | |
2885 | size_t len; | |
2886 | long name_max; | |
2887 | struct dirent *entry; | |
2888 | ||
2889 | name_max = pathconf(path, _PC_NAME_MAX); | |
2890 | if (name_max == -1) { | |
2891 | name_max = PATH_MAX; | |
2892 | } | |
2893 | len = offsetof(struct dirent, d_name) + name_max + 1; | |
2894 | entry = zmalloc(len); | |
2895 | return entry; | |
2896 | } | |
2897 | ||
dcf266c0 JG |
2898 | static |
2899 | int load_session_from_path(const char *path, const char *session_name, | |
1b08cbce JR |
2900 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
2901 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
2902 | { |
2903 | int ret, session_found = !session_name; | |
dcf266c0 JG |
2904 | DIR *directory = NULL; |
2905 | ||
2906 | assert(path); | |
2907 | assert(validation_ctx); | |
2908 | ||
4af16958 DG |
2909 | directory = opendir(path); |
2910 | if (!directory) { | |
11143783 DG |
2911 | switch (errno) { |
2912 | case ENOTDIR: | |
0f0a81b5 DG |
2913 | /* Try the file loading. */ |
2914 | break; | |
11143783 DG |
2915 | case ENOENT: |
2916 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
2917 | goto end; | |
2918 | default: | |
0f0a81b5 DG |
2919 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
2920 | goto end; | |
4af16958 | 2921 | } |
dcf266c0 | 2922 | } |
4af16958 | 2923 | if (directory) { |
dcf266c0 JG |
2924 | struct dirent *entry; |
2925 | struct dirent *result; | |
2926 | char *file_path = NULL; | |
2927 | size_t path_len = strlen(path); | |
2928 | ||
2929 | if (path_len >= PATH_MAX) { | |
2930 | ret = -LTTNG_ERR_INVALID; | |
2931 | goto end; | |
2932 | } | |
2933 | ||
60f70355 | 2934 | entry = alloc_dirent(path); |
dcf266c0 JG |
2935 | if (!entry) { |
2936 | ret = -LTTNG_ERR_NOMEM; | |
2937 | goto end; | |
2938 | } | |
2939 | ||
dcf266c0 JG |
2940 | file_path = zmalloc(PATH_MAX); |
2941 | if (!file_path) { | |
2942 | ret = -LTTNG_ERR_NOMEM; | |
2943 | free(entry); | |
2944 | goto end; | |
2945 | } | |
2946 | ||
2947 | strncpy(file_path, path, path_len); | |
2948 | if (file_path[path_len - 1] != '/') { | |
2949 | file_path[path_len++] = '/'; | |
2950 | } | |
2951 | ||
4af16958 | 2952 | ret = 0; |
dcf266c0 JG |
2953 | /* Search for *.lttng files */ |
2954 | while (!readdir_r(directory, entry, &result) && result) { | |
2955 | size_t file_name_len = strlen(result->d_name); | |
2956 | ||
2957 | if (file_name_len <= | |
2958 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
2959 | continue; | |
2960 | } | |
2961 | ||
431f702e | 2962 | if (path_len + file_name_len >= PATH_MAX) { |
dcf266c0 JG |
2963 | continue; |
2964 | } | |
2965 | ||
2966 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, | |
2967 | result->d_name + file_name_len - sizeof( | |
2968 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
2969 | continue; | |
2970 | } | |
2971 | ||
2972 | strncpy(file_path + path_len, result->d_name, file_name_len); | |
2973 | file_path[path_len + file_name_len] = '\0'; | |
2974 | ||
2975 | ret = load_session_from_file(file_path, session_name, | |
1b08cbce | 2976 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
2977 | if (session_name && !ret) { |
2978 | session_found = 1; | |
2979 | break; | |
2980 | } | |
2981 | } | |
2982 | ||
2983 | free(entry); | |
2984 | free(file_path); | |
2985 | } else { | |
2986 | ret = load_session_from_file(path, session_name, | |
1b08cbce | 2987 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
2988 | if (ret) { |
2989 | goto end; | |
2990 | } else { | |
2991 | session_found = 1; | |
2992 | } | |
2993 | } | |
2994 | ||
2995 | end: | |
2996 | if (directory) { | |
2997 | if (closedir(directory)) { | |
2998 | PERROR("closedir"); | |
2999 | } | |
3000 | } | |
3001 | ||
464133ea | 3002 | if (session_found && !ret) { |
6c66fa0f | 3003 | ret = 0; |
dcf266c0 JG |
3004 | } |
3005 | ||
3006 | return ret; | |
3007 | } | |
3008 | ||
ab38c13f DG |
3009 | /* |
3010 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 3011 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
3012 | */ |
3013 | static int validate_path_creds(const char *path) | |
3014 | { | |
3015 | int ret, uid = getuid(); | |
3016 | struct stat buf; | |
3017 | ||
3018 | assert(path); | |
3019 | ||
cf53c06d | 3020 | if (uid == 0) { |
ab38c13f DG |
3021 | goto valid; |
3022 | } | |
3023 | ||
3024 | ret = stat(path, &buf); | |
3025 | if (ret < 0) { | |
3026 | if (errno != ENOENT) { | |
3027 | PERROR("stat"); | |
3028 | } | |
ab38c13f DG |
3029 | goto valid; |
3030 | } | |
3031 | ||
3032 | if (buf.st_uid != uid) { | |
3033 | goto invalid; | |
3034 | } | |
3035 | ||
3036 | valid: | |
ab38c13f | 3037 | return 1; |
cf53c06d DG |
3038 | invalid: |
3039 | return 0; | |
ab38c13f DG |
3040 | } |
3041 | ||
dcf266c0 JG |
3042 | LTTNG_HIDDEN |
3043 | int config_load_session(const char *path, const char *session_name, | |
1b08cbce JR |
3044 | int overwrite, unsigned int autoload, |
3045 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
3046 | { |
3047 | int ret; | |
6c66fa0f | 3048 | bool session_loaded = false; |
cf53c06d | 3049 | const char *path_ptr = NULL; |
dcf266c0 JG |
3050 | struct session_config_validation_ctx validation_ctx = { 0 }; |
3051 | ||
3052 | ret = init_session_config_validation_ctx(&validation_ctx); | |
3053 | if (ret) { | |
3054 | goto end; | |
3055 | } | |
3056 | ||
3057 | if (!path) { | |
ab38c13f DG |
3058 | char *home_path; |
3059 | const char *sys_path; | |
3060 | ||
dcf266c0 | 3061 | /* Try home path */ |
ab38c13f | 3062 | home_path = utils_get_home_dir(); |
dcf266c0 | 3063 | if (home_path) { |
ab38c13f | 3064 | char path[PATH_MAX]; |
dcf266c0 | 3065 | |
d4fcf703 DG |
3066 | /* |
3067 | * Try user session configuration path. Ignore error here so we can | |
3068 | * continue loading the system wide sessions. | |
3069 | */ | |
ab38c13f DG |
3070 | if (autoload) { |
3071 | ret = snprintf(path, sizeof(path), | |
3072 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
3073 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
3074 | if (ret < 0) { |
3075 | PERROR("snprintf session autoload home config path"); | |
3076 | goto end; | |
3077 | } | |
3078 | ||
3079 | /* | |
3080 | * Credentials are only validated for the autoload in order to | |
3081 | * avoid any user session daemon to try to load kernel sessions | |
3082 | * automatically and failing all the times. | |
3083 | */ | |
3084 | ret = validate_path_creds(path); | |
3085 | if (ret) { | |
3086 | path_ptr = path; | |
3087 | } | |
ab38c13f DG |
3088 | } else { |
3089 | ret = snprintf(path, sizeof(path), | |
3090 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
3091 | if (ret < 0) { |
3092 | PERROR("snprintf session home config path"); | |
3093 | goto end; | |
3094 | } | |
3095 | path_ptr = path; | |
ab38c13f | 3096 | } |
cf53c06d DG |
3097 | if (path_ptr) { |
3098 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3099 | &validation_ctx, overwrite, overrides); |
d4fcf703 DG |
3100 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
3101 | goto end; | |
3102 | } | |
3103 | /* | |
3104 | * Continue even if the session was found since we have to try | |
3105 | * the system wide sessions. | |
3106 | */ | |
6c66fa0f | 3107 | session_loaded = true; |
ab38c13f | 3108 | } |
d4fcf703 | 3109 | } |
ab38c13f | 3110 | |
cf53c06d DG |
3111 | /* Reset path pointer for the system wide dir. */ |
3112 | path_ptr = NULL; | |
3113 | ||
d4fcf703 DG |
3114 | /* Try system wide configuration directory. */ |
3115 | if (autoload) { | |
3116 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
3117 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
3118 | ret = validate_path_creds(sys_path); |
3119 | if (ret) { | |
3120 | path_ptr = sys_path; | |
3121 | } | |
d4fcf703 | 3122 | } else { |
cf53c06d DG |
3123 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
3124 | path_ptr = sys_path; | |
d4fcf703 DG |
3125 | } |
3126 | ||
cf53c06d DG |
3127 | if (path_ptr) { |
3128 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3129 | &validation_ctx, overwrite, overrides); |
6c66fa0f JG |
3130 | if (!ret) { |
3131 | session_loaded = true; | |
3132 | } | |
dcf266c0 JG |
3133 | } |
3134 | } else { | |
3135 | ret = access(path, F_OK); | |
3136 | if (ret < 0) { | |
3137 | PERROR("access"); | |
3138 | switch (errno) { | |
3139 | case ENOENT: | |
3140 | ret = -LTTNG_ERR_INVALID; | |
3141 | WARN("Session configuration path does not exist."); | |
3142 | break; | |
3143 | case EACCES: | |
3144 | ret = -LTTNG_ERR_EPERM; | |
3145 | break; | |
3146 | default: | |
3147 | ret = -LTTNG_ERR_UNK; | |
3148 | break; | |
3149 | } | |
3150 | goto end; | |
3151 | } | |
3152 | ||
3153 | ret = load_session_from_path(path, session_name, | |
1b08cbce | 3154 | &validation_ctx, overwrite, overrides); |
dcf266c0 JG |
3155 | } |
3156 | end: | |
3157 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
3158 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
3159 | /* | |
3160 | * Don't report an error if no sessions are found when called | |
3161 | * without a session_name or a search path. | |
3162 | */ | |
3163 | ret = 0; | |
3164 | } | |
6c66fa0f JG |
3165 | |
3166 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
3167 | /* A matching session was found in one of the search paths. */ | |
3168 | ret = 0; | |
3169 | } | |
dcf266c0 JG |
3170 | return ret; |
3171 | } | |
56766c75 JG |
3172 | |
3173 | static | |
3174 | void __attribute__((destructor)) session_config_exit(void) | |
3175 | { | |
3176 | xmlCleanupParser(); | |
3177 | } |