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> | |
cce35f91 | 35 | #include <common/dynamic-buffer.h> |
e8fa9fb0 | 36 | #include <common/compat/getenv.h> |
fb198a11 JG |
37 | #include <lttng/lttng-error.h> |
38 | #include <libxml/parser.h> | |
39 | #include <libxml/valid.h> | |
40 | #include <libxml/xmlschemas.h> | |
dcf266c0 JG |
41 | #include <libxml/tree.h> |
42 | #include <lttng/lttng.h> | |
43 | #include <lttng/snapshot.h> | |
259c2674 | 44 | #include <lttng/rotation.h> |
c1e83fb4 | 45 | #include <lttng/userspace-probe.h> |
1501a7f3 | 46 | |
f40ef1d5 | 47 | #include "session-config.h" |
36f2332b | 48 | #include "config-internal.h" |
1501a7f3 | 49 | |
c1e83fb4 FD |
50 | #define CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN 7 |
51 | ||
1501a7f3 JG |
52 | struct handler_filter_args { |
53 | const char* section; | |
54 | config_entry_handler_cb handler; | |
55 | void *user_data; | |
56 | }; | |
57 | ||
dcf266c0 JG |
58 | struct session_config_validation_ctx { |
59 | xmlSchemaParserCtxtPtr parser_ctx; | |
60 | xmlSchemaPtr schema; | |
61 | xmlSchemaValidCtxtPtr schema_validation_ctx; | |
62 | }; | |
63 | ||
1501a7f3 JG |
64 | const char * const config_str_yes = "yes"; |
65 | const char * const config_str_true = "true"; | |
66 | const char * const config_str_on = "on"; | |
67 | const char * const config_str_no = "no"; | |
68 | const char * const config_str_false = "false"; | |
69 | const char * const config_str_off = "off"; | |
36f2332b | 70 | const char * const config_xml_encoding = "UTF-8"; |
fb198a11 | 71 | const size_t config_xml_encoding_bytes_per_char = 2; /* Size of the encoding's largest character */ |
36f2332b JG |
72 | const char * const config_xml_indent_string = "\t"; |
73 | const char * const config_xml_true = "true"; | |
74 | const char * const config_xml_false = "false"; | |
1501a7f3 | 75 | |
fb198a11 JG |
76 | const char * const config_element_channel = "channel"; |
77 | const char * const config_element_channels = "channels"; | |
78 | const char * const config_element_domain = "domain"; | |
79 | const char * const config_element_domains = "domains"; | |
80 | const char * const config_element_event = "event"; | |
81 | const char * const config_element_events = "events"; | |
82 | const char * const config_element_context = "context"; | |
83 | const char * const config_element_contexts = "contexts"; | |
84 | const char * const config_element_attributes = "attributes"; | |
85 | const char * const config_element_exclusion = "exclusion"; | |
86 | const char * const config_element_exclusions = "exclusions"; | |
87 | const char * const config_element_function_attributes = "function_attributes"; | |
88 | const char * const config_element_probe_attributes = "probe_attributes"; | |
89 | const char * const config_element_symbol_name = "symbol_name"; | |
90 | const char * const config_element_address = "address"; | |
91 | const char * const config_element_offset = "offset"; | |
c1e83fb4 FD |
92 | |
93 | const char * const config_element_userspace_probe_lookup = "lookup_method"; | |
94 | const char * const config_element_userspace_probe_lookup_function_default = "DEFAULT"; | |
95 | const char * const config_element_userspace_probe_lookup_function_elf = "ELF"; | |
96 | const char * const config_element_userspace_probe_lookup_tracepoint_sdt = "SDT"; | |
97 | const char * const config_element_userspace_probe_location_binary_path = "binary_path"; | |
98 | const char * const config_element_userspace_probe_function_attributes = "userspace_probe_function_attributes"; | |
99 | const char * const config_element_userspace_probe_function_location_function_name = "function_name"; | |
100 | const char * const config_element_userspace_probe_tracepoint_attributes = "userspace_probe_tracepoint_attributes"; | |
101 | const char * const config_element_userspace_probe_tracepoint_location_provider_name = "provider_name"; | |
102 | const char * const config_element_userspace_probe_tracepoint_location_probe_name = "probe_name"; | |
103 | ||
fb198a11 JG |
104 | const char * const config_element_name = "name"; |
105 | const char * const config_element_enabled = "enabled"; | |
106 | const char * const config_element_overwrite_mode = "overwrite_mode"; | |
107 | const char * const config_element_subbuf_size = "subbuffer_size"; | |
108 | const char * const config_element_num_subbuf = "subbuffer_count"; | |
109 | const char * const config_element_switch_timer_interval = "switch_timer_interval"; | |
110 | const char * const config_element_read_timer_interval = "read_timer_interval"; | |
6ab3e98b JG |
111 | LTTNG_HIDDEN const char * const config_element_monitor_timer_interval = "monitor_timer_interval"; |
112 | LTTNG_HIDDEN const char * const config_element_blocking_timeout = "blocking_timeout"; | |
fb198a11 JG |
113 | const char * const config_element_output = "output"; |
114 | const char * const config_element_output_type = "output_type"; | |
115 | const char * const config_element_tracefile_size = "tracefile_size"; | |
116 | const char * const config_element_tracefile_count = "tracefile_count"; | |
117 | const char * const config_element_live_timer_interval = "live_timer_interval"; | |
ec2ed7da JG |
118 | LTTNG_HIDDEN const char * const config_element_discarded_events = "discarded_events"; |
119 | LTTNG_HIDDEN const char * const config_element_lost_packets = "lost_packets"; | |
fb198a11 JG |
120 | const char * const config_element_type = "type"; |
121 | const char * const config_element_buffer_type = "buffer_type"; | |
122 | const char * const config_element_session = "session"; | |
123 | const char * const config_element_sessions = "sessions"; | |
ec2ed7da JG |
124 | LTTNG_HIDDEN const char * const config_element_context_perf = "perf"; |
125 | LTTNG_HIDDEN const char * const config_element_context_app = "app"; | |
126 | LTTNG_HIDDEN const char * const config_element_context_app_provider_name = "provider_name"; | |
127 | LTTNG_HIDDEN const char * const config_element_context_app_ctx_name = "ctx_name"; | |
fb198a11 JG |
128 | const char * const config_element_config = "config"; |
129 | const char * const config_element_started = "started"; | |
130 | const char * const config_element_snapshot_mode = "snapshot_mode"; | |
131 | const char * const config_element_loglevel = "loglevel"; | |
132 | const char * const config_element_loglevel_type = "loglevel_type"; | |
133 | const char * const config_element_filter = "filter"; | |
ec2ed7da | 134 | LTTNG_HIDDEN const char * const config_element_filter_expression = "filter_expression"; |
fb198a11 JG |
135 | const char * const config_element_snapshot_outputs = "snapshot_outputs"; |
136 | const char * const config_element_consumer_output = "consumer_output"; | |
137 | const char * const config_element_destination = "destination"; | |
138 | const char * const config_element_path = "path"; | |
139 | const char * const config_element_net_output = "net_output"; | |
140 | const char * const config_element_control_uri = "control_uri"; | |
141 | const char * const config_element_data_uri = "data_uri"; | |
142 | const char * const config_element_max_size = "max_size"; | |
ccf10263 MD |
143 | const char * const config_element_pid = "pid"; |
144 | const char * const config_element_pids = "pids"; | |
9e7c9f56 | 145 | const char * const config_element_shared_memory_path = "shared_memory_path"; |
ebbf5ab7 JR |
146 | const char * const config_element_pid_tracker = "pid_tracker"; |
147 | const char * const config_element_trackers = "trackers"; | |
847a5916 JR |
148 | const char * const config_element_targets = "targets"; |
149 | const char * const config_element_target_pid = "pid_target"; | |
fb198a11 | 150 | |
ce6176f2 JG |
151 | LTTNG_HIDDEN const char * const config_element_rotation_schedules = "rotation_schedules"; |
152 | LTTNG_HIDDEN const char * const config_element_rotation_schedule_periodic = "periodic"; | |
153 | LTTNG_HIDDEN const char * const config_element_rotation_schedule_periodic_time_us = "time_us"; | |
154 | LTTNG_HIDDEN const char * const config_element_rotation_schedule_size_threshold = "size_threshold"; | |
155 | LTTNG_HIDDEN const char * const config_element_rotation_schedule_size_threshold_bytes = "bytes"; | |
259c2674 | 156 | |
fb198a11 JG |
157 | const char * const config_domain_type_kernel = "KERNEL"; |
158 | const char * const config_domain_type_ust = "UST"; | |
159 | const char * const config_domain_type_jul = "JUL"; | |
5cdb6027 | 160 | const char * const config_domain_type_log4j = "LOG4J"; |
0e115563 | 161 | const char * const config_domain_type_python = "PYTHON"; |
fb198a11 JG |
162 | |
163 | const char * const config_buffer_type_per_pid = "PER_PID"; | |
164 | const char * const config_buffer_type_per_uid = "PER_UID"; | |
165 | const char * const config_buffer_type_global = "GLOBAL"; | |
166 | ||
167 | const char * const config_overwrite_mode_discard = "DISCARD"; | |
168 | const char * const config_overwrite_mode_overwrite = "OVERWRITE"; | |
169 | ||
170 | const char * const config_output_type_splice = "SPLICE"; | |
171 | const char * const config_output_type_mmap = "MMAP"; | |
172 | ||
173 | const char * const config_loglevel_type_all = "ALL"; | |
174 | const char * const config_loglevel_type_range = "RANGE"; | |
175 | const char * const config_loglevel_type_single = "SINGLE"; | |
176 | ||
177 | const char * const config_event_type_all = "ALL"; | |
178 | const char * const config_event_type_tracepoint = "TRACEPOINT"; | |
179 | const char * const config_event_type_probe = "PROBE"; | |
c1e83fb4 | 180 | const char * const config_event_type_userspace_probe = "USERSPACE_PROBE"; |
fb198a11 JG |
181 | const char * const config_event_type_function = "FUNCTION"; |
182 | const char * const config_event_type_function_entry = "FUNCTION_ENTRY"; | |
183 | const char * const config_event_type_noop = "NOOP"; | |
184 | const char * const config_event_type_syscall = "SYSCALL"; | |
185 | const char * const config_event_type_kprobe = "KPROBE"; | |
186 | const char * const config_event_type_kretprobe = "KRETPROBE"; | |
187 | ||
188 | const char * const config_event_context_pid = "PID"; | |
189 | const char * const config_event_context_procname = "PROCNAME"; | |
190 | const char * const config_event_context_prio = "PRIO"; | |
191 | const char * const config_event_context_nice = "NICE"; | |
192 | const char * const config_event_context_vpid = "VPID"; | |
193 | const char * const config_event_context_tid = "TID"; | |
194 | const char * const config_event_context_vtid = "VTID"; | |
195 | const char * const config_event_context_ppid = "PPID"; | |
196 | const char * const config_event_context_vppid = "VPPID"; | |
197 | const char * const config_event_context_pthread_id = "PTHREAD_ID"; | |
198 | const char * const config_event_context_hostname = "HOSTNAME"; | |
199 | const char * const config_event_context_ip = "IP"; | |
e885a367 | 200 | const char * const config_event_context_perf_thread_counter = "PERF_THREAD_COUNTER"; |
ec2ed7da JG |
201 | LTTNG_HIDDEN const char * const config_event_context_app = "APP"; |
202 | LTTNG_HIDDEN const char * const config_event_context_interruptible = "INTERRUPTIBLE"; | |
203 | LTTNG_HIDDEN const char * const config_event_context_preemptible = "PREEMPTIBLE"; | |
204 | LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RESCHEDULE"; | |
205 | LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE"; | |
16c4c991 FD |
206 | LTTNG_HIDDEN const char * const config_event_context_callstack_user= "CALLSTACK_USER"; |
207 | LTTNG_HIDDEN const char * const config_event_context_callstack_kernel = "CALLSTACK_KERNEL"; | |
fb198a11 | 208 | |
fbd987c9 JG |
209 | /* Deprecated symbols */ |
210 | const char * const config_element_perf; | |
211 | ||
d7b645e2 JR |
212 | enum process_event_node_phase { |
213 | CREATION = 0, | |
214 | ENABLE = 1, | |
215 | }; | |
216 | ||
dcf266c0 JG |
217 | struct consumer_output { |
218 | int enabled; | |
219 | char *path; | |
220 | char *control_uri; | |
221 | char *data_uri; | |
222 | }; | |
223 | ||
1501a7f3 JG |
224 | static int config_entry_handler_filter(struct handler_filter_args *args, |
225 | const char *section, const char *name, const char *value) | |
226 | { | |
227 | int ret = 0; | |
228 | struct config_entry entry = { section, name, value }; | |
229 | ||
230 | assert(args); | |
231 | ||
232 | if (!section || !name || !value) { | |
233 | ret = -EIO; | |
234 | goto end; | |
235 | } | |
236 | ||
237 | if (args->section) { | |
238 | if (strcmp(args->section, section)) { | |
239 | goto end; | |
240 | } | |
241 | } | |
242 | ||
243 | ret = args->handler(&entry, args->user_data); | |
244 | end: | |
245 | return ret; | |
246 | } | |
247 | ||
248 | LTTNG_HIDDEN | |
249 | int config_get_section_entries(const char *override_path, const char *section, | |
250 | config_entry_handler_cb handler, void *user_data) | |
251 | { | |
252 | int ret = 0; | |
7ab02a27 | 253 | char *path; |
1501a7f3 JG |
254 | FILE *config_file = NULL; |
255 | struct handler_filter_args filter = { section, handler, user_data }; | |
256 | ||
7ab02a27 DG |
257 | /* First, try system-wide conf. file. */ |
258 | path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH; | |
259 | ||
260 | config_file = fopen(path, "r"); | |
261 | if (config_file) { | |
262 | DBG("Loading daemon conf file at %s", path); | |
263 | /* | |
264 | * Return value is not very important here since error or not, we | |
265 | * continue and try the next possible conf. file. | |
266 | */ | |
267 | (void) ini_parse_file(config_file, | |
268 | (ini_entry_handler) config_entry_handler_filter, | |
269 | (void *) &filter); | |
270 | fclose(config_file); | |
271 | } | |
272 | ||
273 | /* Second is the user local configuration. */ | |
274 | path = utils_get_home_dir(); | |
275 | if (path) { | |
276 | char fullpath[PATH_MAX]; | |
277 | ||
278 | ret = snprintf(fullpath, sizeof(fullpath), | |
279 | DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
280 | if (ret < 0) { | |
281 | PERROR("snprintf user conf. path"); | |
282 | goto error; | |
283 | } | |
284 | ||
285 | config_file = fopen(fullpath, "r"); | |
286 | if (config_file) { | |
287 | DBG("Loading daemon user conf file at %s", path); | |
288 | /* | |
289 | * Return value is not very important here since error or not, we | |
290 | * continue and try the next possible conf. file. | |
291 | */ | |
292 | (void) ini_parse_file(config_file, | |
293 | (ini_entry_handler) config_entry_handler_filter, | |
294 | (void *) &filter); | |
295 | fclose(config_file); | |
296 | } | |
297 | } | |
298 | ||
299 | /* Final path is the one that the user might have provided. */ | |
1501a7f3 JG |
300 | if (override_path) { |
301 | config_file = fopen(override_path, "r"); | |
302 | if (config_file) { | |
7ab02a27 DG |
303 | DBG("Loading daemon command line conf file at %s", override_path); |
304 | (void) ini_parse_file(config_file, | |
305 | (ini_entry_handler) config_entry_handler_filter, | |
306 | (void *) &filter); | |
307 | fclose(config_file); | |
1501a7f3 JG |
308 | } else { |
309 | ERR("Failed to open daemon configuration file at %s", | |
310 | override_path); | |
311 | ret = -ENOENT; | |
7ab02a27 | 312 | goto error; |
1501a7f3 JG |
313 | } |
314 | } | |
315 | ||
7ab02a27 DG |
316 | /* Everything went well. */ |
317 | ret = 0; | |
1501a7f3 | 318 | |
7ab02a27 | 319 | error: |
1501a7f3 JG |
320 | return ret; |
321 | } | |
322 | ||
323 | LTTNG_HIDDEN | |
324 | int config_parse_value(const char *value) | |
325 | { | |
326 | int i, ret = 0; | |
327 | char *endptr, *lower_str; | |
328 | size_t len; | |
329 | unsigned long v; | |
330 | ||
331 | len = strlen(value); | |
332 | if (!len) { | |
333 | ret = -1; | |
334 | goto end; | |
335 | } | |
336 | ||
337 | v = strtoul(value, &endptr, 10); | |
338 | if (endptr != value) { | |
339 | ret = v; | |
340 | goto end; | |
341 | } | |
342 | ||
343 | lower_str = zmalloc(len + 1); | |
344 | if (!lower_str) { | |
345 | PERROR("zmalloc"); | |
346 | ret = -errno; | |
347 | goto end; | |
348 | } | |
349 | ||
350 | for (i = 0; i < len; i++) { | |
351 | lower_str[i] = tolower(value[i]); | |
352 | } | |
353 | ||
354 | if (!strcmp(lower_str, config_str_yes) || | |
355 | !strcmp(lower_str, config_str_true) || | |
356 | !strcmp(lower_str, config_str_on)) { | |
357 | ret = 1; | |
358 | } else if (!strcmp(lower_str, config_str_no) || | |
359 | !strcmp(lower_str, config_str_false) || | |
360 | !strcmp(lower_str, config_str_off)) { | |
361 | ret = 0; | |
362 | } else { | |
363 | ret = -1; | |
364 | } | |
365 | ||
366 | free(lower_str); | |
367 | end: | |
368 | return ret; | |
369 | } | |
36f2332b JG |
370 | |
371 | /* | |
372 | * Returns a xmlChar string which must be released using xmlFree(). | |
373 | */ | |
374 | static xmlChar *encode_string(const char *in_str) | |
375 | { | |
376 | xmlChar *out_str = NULL; | |
377 | xmlCharEncodingHandlerPtr handler; | |
378 | int out_len, ret, in_len; | |
379 | ||
380 | assert(in_str); | |
381 | ||
382 | handler = xmlFindCharEncodingHandler(config_xml_encoding); | |
383 | if (!handler) { | |
384 | ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!"); | |
385 | goto end; | |
386 | } | |
387 | ||
388 | in_len = strlen(in_str); | |
389 | /* | |
f76d886f JG |
390 | * Add 1 byte for the NULL terminted character. The factor 4 here is |
391 | * used because UTF-8 characters can take up to 4 bytes. | |
36f2332b | 392 | */ |
f76d886f | 393 | out_len = (in_len * 4) + 1; |
36f2332b JG |
394 | out_str = xmlMalloc(out_len); |
395 | if (!out_str) { | |
396 | goto end; | |
397 | } | |
398 | ||
399 | ret = handler->input(out_str, &out_len, (const xmlChar *) in_str, &in_len); | |
400 | if (ret < 0) { | |
401 | xmlFree(out_str); | |
402 | out_str = NULL; | |
403 | goto end; | |
404 | } | |
405 | ||
406 | /* out_len is now the size of out_str */ | |
407 | out_str[out_len] = '\0'; | |
408 | end: | |
409 | return out_str; | |
410 | } | |
411 | ||
412 | LTTNG_HIDDEN | |
705bb62f | 413 | struct config_writer *config_writer_create(int fd_output, int indent) |
36f2332b JG |
414 | { |
415 | int ret; | |
416 | struct config_writer *writer; | |
417 | xmlOutputBufferPtr buffer; | |
418 | ||
419 | writer = zmalloc(sizeof(struct config_writer)); | |
420 | if (!writer) { | |
421 | PERROR("zmalloc config_writer_create"); | |
422 | goto end; | |
423 | } | |
424 | ||
425 | buffer = xmlOutputBufferCreateFd(fd_output, NULL); | |
426 | if (!buffer) { | |
427 | goto error_destroy; | |
428 | } | |
429 | ||
430 | writer->writer = xmlNewTextWriter(buffer); | |
431 | ret = xmlTextWriterStartDocument(writer->writer, NULL, | |
432 | config_xml_encoding, NULL); | |
433 | if (ret < 0) { | |
434 | goto error_destroy; | |
435 | } | |
436 | ||
437 | ret = xmlTextWriterSetIndentString(writer->writer, | |
438 | BAD_CAST config_xml_indent_string); | |
705bb62f | 439 | if (ret) { |
36f2332b JG |
440 | goto error_destroy; |
441 | } | |
442 | ||
705bb62f JRJ |
443 | ret = xmlTextWriterSetIndent(writer->writer, indent); |
444 | if (ret) { | |
36f2332b JG |
445 | goto error_destroy; |
446 | } | |
447 | ||
448 | end: | |
449 | return writer; | |
450 | error_destroy: | |
451 | config_writer_destroy(writer); | |
452 | return NULL; | |
453 | } | |
454 | ||
455 | LTTNG_HIDDEN | |
456 | int config_writer_destroy(struct config_writer *writer) | |
457 | { | |
458 | int ret = 0; | |
459 | ||
460 | if (!writer) { | |
461 | ret = -EINVAL; | |
462 | goto end; | |
463 | } | |
464 | ||
465 | if (xmlTextWriterEndDocument(writer->writer) < 0) { | |
466 | WARN("Could not close XML document"); | |
467 | ret = -EIO; | |
468 | } | |
469 | ||
470 | if (writer->writer) { | |
471 | xmlFreeTextWriter(writer->writer); | |
472 | } | |
473 | ||
474 | free(writer); | |
475 | end: | |
476 | return ret; | |
477 | } | |
478 | ||
479 | LTTNG_HIDDEN | |
480 | int config_writer_open_element(struct config_writer *writer, | |
481 | const char *element_name) | |
482 | { | |
483 | int ret; | |
484 | xmlChar *encoded_element_name; | |
485 | ||
486 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
487 | ret = -1; | |
488 | goto end; | |
489 | } | |
490 | ||
491 | encoded_element_name = encode_string(element_name); | |
492 | if (!encoded_element_name) { | |
493 | ret = -1; | |
494 | goto end; | |
495 | } | |
496 | ||
497 | ret = xmlTextWriterStartElement(writer->writer, encoded_element_name); | |
498 | xmlFree(encoded_element_name); | |
499 | end: | |
28676a1d | 500 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
501 | } |
502 | ||
e10b6a1c JG |
503 | LTTNG_HIDDEN |
504 | int config_writer_write_attribute(struct config_writer *writer, | |
505 | const char *name, const char *value) | |
506 | { | |
507 | int ret; | |
508 | xmlChar *encoded_name = NULL; | |
509 | xmlChar *encoded_value = NULL; | |
510 | ||
511 | if (!writer || !writer->writer || !name || !name[0]) { | |
512 | ret = -1; | |
513 | goto end; | |
514 | } | |
515 | ||
516 | encoded_name = encode_string(name); | |
517 | if (!encoded_name) { | |
518 | ret = -1; | |
519 | goto end; | |
520 | } | |
521 | ||
522 | encoded_value = encode_string(value); | |
523 | if (!encoded_value) { | |
524 | ret = -1; | |
525 | goto end; | |
526 | } | |
527 | ||
528 | ret = xmlTextWriterWriteAttribute(writer->writer, encoded_name, | |
529 | encoded_value); | |
530 | end: | |
531 | xmlFree(encoded_name); | |
532 | xmlFree(encoded_value); | |
533 | return ret >= 0 ? 0 : ret; | |
534 | } | |
535 | ||
36f2332b JG |
536 | LTTNG_HIDDEN |
537 | int config_writer_close_element(struct config_writer *writer) | |
538 | { | |
539 | int ret; | |
540 | ||
541 | if (!writer || !writer->writer) { | |
542 | ret = -1; | |
543 | goto end; | |
544 | } | |
545 | ||
546 | ret = xmlTextWriterEndElement(writer->writer); | |
547 | end: | |
28676a1d | 548 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
549 | } |
550 | ||
551 | LTTNG_HIDDEN | |
552 | int config_writer_write_element_unsigned_int(struct config_writer *writer, | |
553 | const char *element_name, uint64_t value) | |
554 | { | |
555 | int ret; | |
556 | xmlChar *encoded_element_name; | |
557 | ||
558 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
559 | ret = -1; | |
560 | goto end; | |
561 | } | |
562 | ||
563 | encoded_element_name = encode_string(element_name); | |
564 | if (!encoded_element_name) { | |
565 | ret = -1; | |
566 | goto end; | |
567 | } | |
568 | ||
569 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
570 | encoded_element_name, "%" PRIu64, value); | |
571 | xmlFree(encoded_element_name); | |
572 | end: | |
28676a1d | 573 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
574 | } |
575 | ||
576 | LTTNG_HIDDEN | |
577 | int config_writer_write_element_signed_int(struct config_writer *writer, | |
578 | const char *element_name, int64_t value) | |
579 | { | |
580 | int ret; | |
581 | xmlChar *encoded_element_name; | |
582 | ||
583 | if (!writer || !writer->writer || !element_name || !element_name[0]) { | |
584 | ret = -1; | |
585 | goto end; | |
586 | } | |
587 | ||
588 | encoded_element_name = encode_string(element_name); | |
589 | if (!encoded_element_name) { | |
590 | ret = -1; | |
591 | goto end; | |
592 | } | |
593 | ||
594 | ret = xmlTextWriterWriteFormatElement(writer->writer, | |
595 | encoded_element_name, "%" PRIi64, value); | |
596 | xmlFree(encoded_element_name); | |
597 | end: | |
28676a1d | 598 | return ret >= 0 ? 0 : ret; |
36f2332b JG |
599 | } |
600 | ||
601 | LTTNG_HIDDEN | |
602 | int config_writer_write_element_bool(struct config_writer *writer, | |
603 | const char *element_name, int value) | |
604 | { | |
605 | return config_writer_write_element_string(writer, element_name, | |
606 | value ? config_xml_true : config_xml_false); | |
607 | } | |
608 | ||
609 | LTTNG_HIDDEN | |
610 | int config_writer_write_element_string(struct config_writer *writer, | |
611 | const char *element_name, const char *value) | |
612 | { | |
613 | int ret; | |
614 | xmlChar *encoded_element_name = NULL; | |
615 | xmlChar *encoded_value = NULL; | |
616 | ||
617 | if (!writer || !writer->writer || !element_name || !element_name[0] || | |
618 | !value) { | |
619 | ret = -1; | |
620 | goto end; | |
621 | } | |
622 | ||
623 | encoded_element_name = encode_string(element_name); | |
624 | if (!encoded_element_name) { | |
625 | ret = -1; | |
626 | goto end; | |
627 | } | |
628 | ||
629 | encoded_value = encode_string(value); | |
630 | if (!encoded_value) { | |
631 | ret = -1; | |
632 | goto end; | |
633 | } | |
634 | ||
635 | ret = xmlTextWriterWriteElement(writer->writer, encoded_element_name, | |
dcf266c0 | 636 | encoded_value); |
36f2332b JG |
637 | end: |
638 | xmlFree(encoded_element_name); | |
639 | xmlFree(encoded_value); | |
28676a1d | 640 | return ret >= 0 ? 0 : ret; |
36f2332b | 641 | } |
dcf266c0 JG |
642 | |
643 | static | |
644 | void xml_error_handler(void *ctx, const char *format, ...) | |
645 | { | |
646 | char *errMsg; | |
647 | va_list args; | |
648 | int ret; | |
649 | ||
650 | va_start(args, format); | |
651 | ret = vasprintf(&errMsg, format, args); | |
6c043b48 | 652 | va_end(args); |
dcf266c0 JG |
653 | if (ret == -1) { |
654 | ERR("String allocation failed in xml error handler"); | |
655 | return; | |
656 | } | |
dcf266c0 JG |
657 | |
658 | fprintf(stderr, "XML Error: %s", errMsg); | |
659 | free(errMsg); | |
660 | } | |
661 | ||
662 | static | |
663 | void fini_session_config_validation_ctx( | |
664 | struct session_config_validation_ctx *ctx) | |
665 | { | |
666 | if (ctx->parser_ctx) { | |
667 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); | |
668 | } | |
669 | ||
670 | if (ctx->schema) { | |
671 | xmlSchemaFree(ctx->schema); | |
672 | } | |
673 | ||
674 | if (ctx->schema_validation_ctx) { | |
675 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); | |
676 | } | |
677 | ||
678 | memset(ctx, 0, sizeof(struct session_config_validation_ctx)); | |
679 | } | |
680 | ||
54e399cb JG |
681 | static |
682 | char *get_session_config_xsd_path() | |
683 | { | |
684 | char *xsd_path; | |
e8fa9fb0 | 685 | const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV); |
54e399cb JG |
686 | size_t base_path_len; |
687 | size_t max_path_len; | |
688 | ||
689 | if (!base_path) { | |
690 | base_path = DEFAULT_SESSION_CONFIG_XSD_PATH; | |
691 | } | |
692 | ||
693 | base_path_len = strlen(base_path); | |
694 | max_path_len = base_path_len + | |
695 | sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1; | |
696 | xsd_path = zmalloc(max_path_len); | |
697 | if (!xsd_path) { | |
698 | goto end; | |
699 | } | |
700 | ||
00a7f6f8 | 701 | strcpy(xsd_path, base_path); |
54e399cb JG |
702 | if (xsd_path[base_path_len - 1] != '/') { |
703 | xsd_path[base_path_len++] = '/'; | |
704 | } | |
705 | ||
00a7f6f8 | 706 | strcpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME); |
54e399cb JG |
707 | end: |
708 | return xsd_path; | |
709 | } | |
710 | ||
dcf266c0 JG |
711 | static |
712 | int init_session_config_validation_ctx( | |
713 | struct session_config_validation_ctx *ctx) | |
714 | { | |
715 | int ret; | |
54e399cb JG |
716 | char *xsd_path = get_session_config_xsd_path(); |
717 | ||
718 | if (!xsd_path) { | |
719 | ret = -LTTNG_ERR_NOMEM; | |
720 | goto end; | |
721 | } | |
dcf266c0 | 722 | |
54e399cb | 723 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
dcf266c0 JG |
724 | if (!ctx->parser_ctx) { |
725 | ERR("XSD parser context creation failed"); | |
726 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
727 | goto end; | |
728 | } | |
729 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, | |
730 | xml_error_handler, NULL); | |
731 | ||
732 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); | |
733 | if (!ctx->schema) { | |
734 | ERR("XSD parsing failed"); | |
735 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
736 | goto end; | |
737 | } | |
738 | ||
739 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); | |
740 | if (!ctx->schema_validation_ctx) { | |
741 | ERR("XSD validation context creation failed"); | |
742 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
743 | goto end; | |
744 | } | |
745 | ||
746 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, | |
747 | xml_error_handler, NULL); | |
748 | ret = 0; | |
749 | ||
750 | end: | |
751 | if (ret) { | |
752 | fini_session_config_validation_ctx(ctx); | |
753 | } | |
754 | ||
54e399cb | 755 | free(xsd_path); |
dcf266c0 JG |
756 | return ret; |
757 | } | |
758 | ||
759 | static | |
760 | int parse_uint(xmlChar *str, uint64_t *val) | |
761 | { | |
762 | int ret; | |
763 | char *endptr; | |
764 | ||
765 | if (!str || !val) { | |
766 | ret = -1; | |
767 | goto end; | |
768 | } | |
769 | ||
770 | *val = strtoull((const char *) str, &endptr, 10); | |
771 | if (!endptr || *endptr) { | |
772 | ret = -1; | |
773 | } else { | |
774 | ret = 0; | |
775 | } | |
776 | ||
777 | end: | |
778 | return ret; | |
779 | } | |
780 | ||
781 | static | |
782 | int parse_int(xmlChar *str, int64_t *val) | |
783 | { | |
784 | int ret; | |
785 | char *endptr; | |
786 | ||
787 | if (!str || !val) { | |
788 | ret = -1; | |
789 | goto end; | |
790 | } | |
791 | ||
792 | *val = strtoll((const char *) str, &endptr, 10); | |
793 | if (!endptr || *endptr) { | |
794 | ret = -1; | |
795 | } else { | |
796 | ret = 0; | |
797 | } | |
798 | ||
799 | end: | |
800 | return ret; | |
801 | } | |
802 | ||
803 | static | |
804 | int parse_bool(xmlChar *str, int *val) | |
805 | { | |
806 | int ret = 0; | |
807 | ||
808 | if (!str || !val) { | |
809 | ret = -1; | |
810 | goto end; | |
811 | } | |
812 | ||
813 | if (!strcmp((const char *) str, config_xml_true)) { | |
814 | *val = 1; | |
815 | } else if (!strcmp((const char *) str, config_xml_false)) { | |
816 | *val = 0; | |
817 | } else { | |
818 | WARN("Invalid boolean value encoutered (%s).", | |
819 | (const char *) str); | |
820 | ret = -1; | |
821 | } | |
822 | end: | |
823 | return ret; | |
824 | } | |
825 | ||
826 | static | |
827 | int get_domain_type(xmlChar *domain) | |
828 | { | |
829 | int ret; | |
830 | ||
831 | if (!domain) { | |
832 | goto error; | |
833 | } | |
834 | ||
835 | if (!strcmp((char *) domain, config_domain_type_kernel)) { | |
836 | ret = LTTNG_DOMAIN_KERNEL; | |
837 | } else if (!strcmp((char *) domain, config_domain_type_ust)) { | |
838 | ret = LTTNG_DOMAIN_UST; | |
839 | } else if (!strcmp((char *) domain, config_domain_type_jul)) { | |
840 | ret = LTTNG_DOMAIN_JUL; | |
5cdb6027 DG |
841 | } else if (!strcmp((char *) domain, config_domain_type_log4j)) { |
842 | ret = LTTNG_DOMAIN_LOG4J; | |
0e115563 DG |
843 | } else if (!strcmp((char *) domain, config_domain_type_python)) { |
844 | ret = LTTNG_DOMAIN_PYTHON; | |
dcf266c0 JG |
845 | } else { |
846 | goto error; | |
847 | } | |
848 | ||
849 | return ret; | |
850 | error: | |
851 | return -1; | |
852 | } | |
853 | ||
854 | static | |
855 | int get_buffer_type(xmlChar *buffer_type) | |
856 | { | |
857 | int ret; | |
858 | ||
859 | if (!buffer_type) { | |
860 | goto error; | |
861 | } | |
862 | ||
863 | if (!strcmp((char *) buffer_type, config_buffer_type_global)) { | |
864 | ret = LTTNG_BUFFER_GLOBAL; | |
865 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_uid)) { | |
866 | ret = LTTNG_BUFFER_PER_UID; | |
867 | } else if (!strcmp((char *) buffer_type, config_buffer_type_per_pid)) { | |
868 | ret = LTTNG_BUFFER_PER_PID; | |
869 | } else { | |
870 | goto error; | |
871 | } | |
872 | ||
873 | return ret; | |
874 | error: | |
875 | return -1; | |
876 | } | |
877 | ||
878 | static | |
879 | int get_overwrite_mode(xmlChar *overwrite_mode) | |
880 | { | |
881 | int ret; | |
882 | ||
883 | if (!overwrite_mode) { | |
884 | goto error; | |
885 | } | |
886 | ||
887 | if (!strcmp((char *) overwrite_mode, config_overwrite_mode_overwrite)) { | |
888 | ret = 1; | |
889 | } else if (!strcmp((char *) overwrite_mode, | |
890 | config_overwrite_mode_discard)) { | |
891 | ret = 0; | |
892 | } else { | |
893 | goto error; | |
894 | } | |
895 | ||
896 | return ret; | |
897 | error: | |
898 | return -1; | |
899 | } | |
900 | ||
901 | static | |
902 | int get_output_type(xmlChar *output_type) | |
903 | { | |
904 | int ret; | |
905 | ||
906 | if (!output_type) { | |
907 | goto error; | |
908 | } | |
909 | ||
910 | if (!strcmp((char *) output_type, config_output_type_mmap)) { | |
911 | ret = LTTNG_EVENT_MMAP; | |
912 | } else if (!strcmp((char *) output_type, config_output_type_splice)) { | |
913 | ret = LTTNG_EVENT_SPLICE; | |
914 | } else { | |
915 | goto error; | |
916 | } | |
917 | ||
918 | return ret; | |
919 | error: | |
920 | return -1; | |
921 | } | |
922 | ||
923 | static | |
924 | int get_event_type(xmlChar *event_type) | |
925 | { | |
926 | int ret; | |
927 | ||
928 | if (!event_type) { | |
929 | goto error; | |
930 | } | |
931 | ||
932 | if (!strcmp((char *) event_type, config_event_type_all)) { | |
933 | ret = LTTNG_EVENT_ALL; | |
934 | } else if (!strcmp((char *) event_type, config_event_type_tracepoint)) { | |
935 | ret = LTTNG_EVENT_TRACEPOINT; | |
936 | } else if (!strcmp((char *) event_type, config_event_type_probe)) { | |
937 | ret = LTTNG_EVENT_PROBE; | |
c1e83fb4 FD |
938 | } else if (!strcmp((char *) event_type, |
939 | config_event_type_userspace_probe)) { | |
940 | ret = LTTNG_EVENT_USERSPACE_PROBE; | |
dcf266c0 JG |
941 | } else if (!strcmp((char *) event_type, config_event_type_function)) { |
942 | ret = LTTNG_EVENT_FUNCTION; | |
943 | } else if (!strcmp((char *) event_type, | |
c1e83fb4 | 944 | config_event_type_function_entry)) { |
dcf266c0 JG |
945 | ret = LTTNG_EVENT_FUNCTION_ENTRY; |
946 | } else if (!strcmp((char *) event_type, config_event_type_noop)) { | |
947 | ret = LTTNG_EVENT_NOOP; | |
948 | } else if (!strcmp((char *) event_type, config_event_type_syscall)) { | |
949 | ret = LTTNG_EVENT_SYSCALL; | |
950 | } else { | |
951 | goto error; | |
952 | } | |
953 | ||
954 | return ret; | |
955 | error: | |
956 | return -1; | |
957 | } | |
958 | ||
959 | static | |
960 | int get_loglevel_type(xmlChar *loglevel_type) | |
961 | { | |
962 | int ret; | |
963 | ||
964 | if (!loglevel_type) { | |
965 | goto error; | |
966 | } | |
967 | ||
968 | if (!strcmp((char *) loglevel_type, config_loglevel_type_all)) { | |
969 | ret = LTTNG_EVENT_LOGLEVEL_ALL; | |
970 | } else if (!strcmp((char *) loglevel_type, | |
971 | config_loglevel_type_range)) { | |
972 | ret = LTTNG_EVENT_LOGLEVEL_RANGE; | |
973 | } else if (!strcmp((char *) loglevel_type, | |
974 | config_loglevel_type_single)) { | |
975 | ret = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
976 | } else { | |
977 | goto error; | |
978 | } | |
979 | ||
980 | return ret; | |
981 | error: | |
982 | return -1; | |
983 | } | |
984 | ||
985 | /* | |
986 | * Return the context type or -1 on error. | |
987 | */ | |
988 | static | |
989 | int get_context_type(xmlChar *context_type) | |
990 | { | |
991 | int ret; | |
992 | ||
993 | if (!context_type) { | |
994 | goto error; | |
995 | } | |
996 | ||
997 | if (!strcmp((char *) context_type, config_event_context_pid)) { | |
998 | ret = LTTNG_EVENT_CONTEXT_PID; | |
999 | } else if (!strcmp((char *) context_type, | |
1000 | config_event_context_procname)) { | |
1001 | ret = LTTNG_EVENT_CONTEXT_PROCNAME; | |
1002 | } else if (!strcmp((char *) context_type, | |
1003 | config_event_context_prio)) { | |
1004 | ret = LTTNG_EVENT_CONTEXT_PRIO; | |
1005 | } else if (!strcmp((char *) context_type, | |
1006 | config_event_context_nice)) { | |
1007 | ret = LTTNG_EVENT_CONTEXT_NICE; | |
1008 | } else if (!strcmp((char *) context_type, | |
1009 | config_event_context_vpid)) { | |
1010 | ret = LTTNG_EVENT_CONTEXT_VPID; | |
1011 | } else if (!strcmp((char *) context_type, | |
1012 | config_event_context_tid)) { | |
1013 | ret = LTTNG_EVENT_CONTEXT_TID; | |
1014 | } else if (!strcmp((char *) context_type, | |
1015 | config_event_context_vtid)) { | |
1016 | ret = LTTNG_EVENT_CONTEXT_VTID; | |
1017 | } else if (!strcmp((char *) context_type, | |
1018 | config_event_context_ppid)) { | |
1019 | ret = LTTNG_EVENT_CONTEXT_PPID; | |
1020 | } else if (!strcmp((char *) context_type, | |
1021 | config_event_context_vppid)) { | |
1022 | ret = LTTNG_EVENT_CONTEXT_VPPID; | |
1023 | } else if (!strcmp((char *) context_type, | |
1024 | config_event_context_pthread_id)) { | |
1025 | ret = LTTNG_EVENT_CONTEXT_PTHREAD_ID; | |
1026 | } else if (!strcmp((char *) context_type, | |
1027 | config_event_context_hostname)) { | |
1028 | ret = LTTNG_EVENT_CONTEXT_HOSTNAME; | |
1029 | } else if (!strcmp((char *) context_type, | |
1030 | config_event_context_ip)) { | |
1031 | ret = LTTNG_EVENT_CONTEXT_IP; | |
1ae5e83e JD |
1032 | } else if (!strcmp((char *) context_type, |
1033 | config_event_context_interruptible)) { | |
1034 | ret = LTTNG_EVENT_CONTEXT_INTERRUPTIBLE; | |
1035 | } else if (!strcmp((char *) context_type, | |
1036 | config_event_context_preemptible)) { | |
1037 | ret = LTTNG_EVENT_CONTEXT_PREEMPTIBLE; | |
1038 | } else if (!strcmp((char *) context_type, | |
1039 | config_event_context_need_reschedule)) { | |
1040 | ret = LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE; | |
1041 | } else if (!strcmp((char *) context_type, | |
1042 | config_event_context_migratable)) { | |
1043 | ret = LTTNG_EVENT_CONTEXT_MIGRATABLE; | |
16c4c991 FD |
1044 | } else if (!strcmp((char *) context_type, |
1045 | config_event_context_callstack_user)) { | |
1046 | ret = LTTNG_EVENT_CONTEXT_CALLSTACK_USER; | |
1047 | } else if (!strcmp((char *) context_type, | |
1048 | config_event_context_callstack_kernel)) { | |
1049 | ret = LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL; | |
dcf266c0 JG |
1050 | } else { |
1051 | goto error; | |
1052 | } | |
1053 | ||
1054 | return ret; | |
1055 | error: | |
1056 | return -1; | |
1057 | } | |
1058 | ||
1059 | static | |
1060 | int init_domain(xmlNodePtr domain_node, struct lttng_domain *domain) | |
1061 | { | |
1062 | int ret; | |
1063 | xmlNodePtr node; | |
1064 | ||
1065 | for (node = xmlFirstElementChild(domain_node); node; | |
1066 | node = xmlNextElementSibling(node)) { | |
1067 | if (!strcmp((const char *) node->name, config_element_type)) { | |
1068 | /* domain type */ | |
1069 | xmlChar *node_content = xmlNodeGetContent(node); | |
1070 | if (!node_content) { | |
1071 | ret = -LTTNG_ERR_NOMEM; | |
1072 | goto end; | |
1073 | } | |
1074 | ||
1075 | ret = get_domain_type(node_content); | |
1076 | free(node_content); | |
1077 | if (ret < 0) { | |
1078 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1079 | goto end; | |
1080 | } | |
1081 | ||
1082 | domain->type = ret; | |
1083 | } else if (!strcmp((const char *) node->name, | |
1084 | config_element_buffer_type)) { | |
1085 | /* buffer type */ | |
1086 | xmlChar *node_content = xmlNodeGetContent(node); | |
1087 | if (!node_content) { | |
1088 | ret = -LTTNG_ERR_NOMEM; | |
1089 | goto end; | |
1090 | } | |
1091 | ||
1092 | ret = get_buffer_type(node_content); | |
1093 | free(node_content); | |
1094 | if (ret < 0) { | |
1095 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1096 | goto end; | |
1097 | } | |
1098 | ||
1099 | domain->buf_type = ret; | |
1100 | } | |
1101 | } | |
1102 | ret = 0; | |
1103 | end: | |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | static | |
1108 | int get_net_output_uris(xmlNodePtr net_output_node, char **control_uri, | |
1109 | char **data_uri) | |
1110 | { | |
1111 | xmlNodePtr node; | |
1112 | ||
1113 | for (node = xmlFirstElementChild(net_output_node); node; | |
1114 | node = xmlNextElementSibling(node)) { | |
1115 | if (!strcmp((const char *) node->name, config_element_control_uri)) { | |
1116 | /* control_uri */ | |
1117 | *control_uri = (char *) xmlNodeGetContent(node); | |
1118 | if (!*control_uri) { | |
1119 | break; | |
1120 | } | |
1121 | } else { | |
1122 | /* data_uri */ | |
1123 | *data_uri = (char *) xmlNodeGetContent(node); | |
1124 | if (!*data_uri) { | |
1125 | break; | |
1126 | } | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | return *control_uri || *data_uri ? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1131 | } | |
1132 | ||
1133 | static | |
1134 | int process_consumer_output(xmlNodePtr consumer_output_node, | |
1135 | struct consumer_output *output) | |
1136 | { | |
1137 | int ret; | |
1138 | xmlNodePtr node; | |
1139 | ||
1140 | assert(output); | |
1141 | ||
1142 | for (node = xmlFirstElementChild(consumer_output_node); node; | |
1143 | node = xmlNextElementSibling(node)) { | |
1144 | if (!strcmp((const char *) node->name, config_element_enabled)) { | |
1145 | xmlChar *enabled_str = xmlNodeGetContent(node); | |
1146 | ||
1147 | /* enabled */ | |
1148 | if (!enabled_str) { | |
1149 | ret = -LTTNG_ERR_NOMEM; | |
1150 | goto end; | |
1151 | } | |
1152 | ||
1153 | ret = parse_bool(enabled_str, &output->enabled); | |
1154 | free(enabled_str); | |
1155 | if (ret) { | |
1156 | goto end; | |
1157 | } | |
1158 | } else { | |
1159 | xmlNodePtr output_type_node; | |
1160 | ||
1161 | /* destination */ | |
1162 | output_type_node = xmlFirstElementChild(node); | |
1163 | if (!output_type_node) { | |
1164 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1165 | goto end; | |
1166 | } | |
1167 | ||
1168 | if (!strcmp((const char *) output_type_node->name, | |
1169 | config_element_path)) { | |
1170 | /* path */ | |
1171 | output->path = (char *) xmlNodeGetContent(output_type_node); | |
1172 | if (!output->path) { | |
1173 | ret = -LTTNG_ERR_NOMEM; | |
1174 | goto end; | |
1175 | } | |
1176 | } else { | |
1177 | /* net_output */ | |
1178 | ret = get_net_output_uris(output_type_node, | |
1179 | &output->control_uri, &output->data_uri); | |
1180 | if (ret) { | |
1181 | goto end; | |
1182 | } | |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | ret = 0; | |
1187 | ||
1188 | end: | |
1189 | if (ret) { | |
1190 | free(output->path); | |
1191 | free(output->control_uri); | |
1192 | free(output->data_uri); | |
1193 | memset(output, 0, sizeof(struct consumer_output)); | |
1194 | } | |
1195 | return ret; | |
1196 | } | |
1197 | ||
1198 | static | |
95681498 JG |
1199 | int create_session_net_output(const char *name, const char *control_uri, |
1200 | const char *data_uri) | |
dcf266c0 JG |
1201 | { |
1202 | int ret; | |
1203 | struct lttng_handle *handle; | |
1204 | const char *uri = NULL; | |
1205 | ||
1206 | assert(name); | |
dcf266c0 | 1207 | |
95681498 | 1208 | handle = lttng_create_handle(name, NULL); |
dcf266c0 JG |
1209 | if (!handle) { |
1210 | ret = -LTTNG_ERR_NOMEM; | |
1211 | goto end; | |
1212 | } | |
1213 | ||
1214 | if (!control_uri || !data_uri) { | |
1215 | uri = control_uri ? control_uri : data_uri; | |
1216 | control_uri = uri; | |
1217 | data_uri = uri; | |
1218 | } | |
1219 | ||
1220 | ret = lttng_set_consumer_url(handle, control_uri, data_uri); | |
1221 | lttng_destroy_handle(handle); | |
1222 | end: | |
1223 | return ret; | |
1224 | } | |
1225 | ||
1226 | static | |
1b08cbce JR |
1227 | int create_snapshot_session(const char *session_name, xmlNodePtr output_node, |
1228 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1229 | { |
1230 | int ret; | |
1231 | xmlNodePtr node = NULL; | |
1232 | xmlNodePtr snapshot_output_list_node; | |
1233 | xmlNodePtr snapshot_output_node; | |
1234 | ||
1235 | assert(session_name); | |
1236 | ||
1237 | ret = lttng_create_session_snapshot(session_name, NULL); | |
1238 | if (ret) { | |
1239 | goto end; | |
1240 | } | |
1241 | ||
1242 | if (!output_node) { | |
1243 | goto end; | |
1244 | } | |
1245 | ||
1246 | snapshot_output_list_node = xmlFirstElementChild(output_node); | |
1247 | ||
1248 | /* Parse and create snapshot outputs */ | |
1249 | ||
1250 | for (snapshot_output_node = | |
1251 | xmlFirstElementChild(snapshot_output_list_node); | |
1252 | snapshot_output_node; snapshot_output_node = | |
1253 | xmlNextElementSibling(snapshot_output_node)) { | |
1254 | char *name = NULL; | |
1255 | uint64_t max_size = UINT64_MAX; | |
1256 | struct consumer_output output = { 0 }; | |
1257 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1b08cbce JR |
1258 | const char *control_uri = NULL; |
1259 | const char *data_uri = NULL; | |
1260 | const char *path = NULL; | |
dcf266c0 JG |
1261 | |
1262 | for (node = xmlFirstElementChild(snapshot_output_node); node; | |
1263 | node = xmlNextElementSibling(node)) { | |
1264 | if (!strcmp((const char *) node->name, | |
1265 | config_element_name)) { | |
1266 | /* name */ | |
1267 | name = (char *) xmlNodeGetContent(node); | |
1268 | if (!name) { | |
1269 | ret = -LTTNG_ERR_NOMEM; | |
1270 | goto error_snapshot_output; | |
1271 | } | |
1272 | } else if (!strcmp((const char *) node->name, | |
1273 | config_element_max_size)) { | |
1274 | xmlChar *content = xmlNodeGetContent(node); | |
1275 | ||
1276 | /* max_size */ | |
1277 | if (!content) { | |
1278 | ret = -LTTNG_ERR_NOMEM; | |
1279 | goto error_snapshot_output; | |
1280 | } | |
1281 | ret = parse_uint(content, &max_size); | |
1282 | free(content); | |
1283 | if (ret) { | |
1284 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1285 | goto error_snapshot_output; | |
1286 | } | |
1287 | } else { | |
1288 | /* consumer_output */ | |
1289 | ret = process_consumer_output(node, &output); | |
1290 | if (ret) { | |
1291 | goto error_snapshot_output; | |
1292 | } | |
1293 | } | |
1294 | } | |
1295 | ||
21a3f144 JR |
1296 | control_uri = output.control_uri; |
1297 | data_uri = output.data_uri; | |
1298 | path = output.path; | |
1299 | ||
1b08cbce JR |
1300 | if (overrides) { |
1301 | if (overrides->path_url) { | |
1b08cbce | 1302 | path = overrides->path_url; |
21a3f144 JR |
1303 | /* Control/data_uri are null */ |
1304 | control_uri = NULL; | |
1305 | data_uri = NULL; | |
1b08cbce JR |
1306 | } else { |
1307 | if (overrides->ctrl_url) { | |
1b08cbce | 1308 | control_uri = overrides->ctrl_url; |
21a3f144 JR |
1309 | /* path is null */ |
1310 | path = NULL; | |
1b08cbce JR |
1311 | } |
1312 | if (overrides->data_url) { | |
1b08cbce | 1313 | data_uri = overrides->data_url; |
21a3f144 JR |
1314 | /* path is null */ |
1315 | path = NULL; | |
1b08cbce JR |
1316 | } |
1317 | } | |
1b08cbce JR |
1318 | } |
1319 | ||
dcf266c0 JG |
1320 | snapshot_output = lttng_snapshot_output_create(); |
1321 | if (!snapshot_output) { | |
1322 | ret = -LTTNG_ERR_NOMEM; | |
1323 | goto error_snapshot_output; | |
1324 | } | |
1325 | ||
1326 | ret = lttng_snapshot_output_set_name(name, snapshot_output); | |
1327 | if (ret) { | |
1328 | goto error_snapshot_output; | |
1329 | } | |
1330 | ||
1331 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1332 | if (ret) { | |
1333 | goto error_snapshot_output; | |
1334 | } | |
1335 | ||
1b08cbce JR |
1336 | if (path) { |
1337 | ret = lttng_snapshot_output_set_ctrl_url(path, | |
dcf266c0 JG |
1338 | snapshot_output); |
1339 | if (ret) { | |
1340 | goto error_snapshot_output; | |
1341 | } | |
1342 | } else { | |
1b08cbce JR |
1343 | if (control_uri) { |
1344 | ret = lttng_snapshot_output_set_ctrl_url(control_uri, | |
dcf266c0 JG |
1345 | snapshot_output); |
1346 | if (ret) { | |
1347 | goto error_snapshot_output; | |
1348 | } | |
1349 | } | |
1350 | ||
1b08cbce JR |
1351 | if (data_uri) { |
1352 | ret = lttng_snapshot_output_set_data_url(data_uri, | |
dcf266c0 JG |
1353 | snapshot_output); |
1354 | if (ret) { | |
1355 | goto error_snapshot_output; | |
1356 | } | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | ret = lttng_snapshot_add_output(session_name, snapshot_output); | |
1361 | error_snapshot_output: | |
1362 | free(name); | |
1363 | free(output.path); | |
1364 | free(output.control_uri); | |
1365 | free(output.data_uri); | |
1366 | lttng_snapshot_output_destroy(snapshot_output); | |
1367 | if (ret) { | |
1368 | goto end; | |
1369 | } | |
1370 | } | |
1371 | end: | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | static | |
1376 | int create_session(const char *name, | |
dcf266c0 | 1377 | xmlNodePtr output_node, |
1b08cbce JR |
1378 | uint64_t live_timer_interval, |
1379 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
1380 | { |
1381 | int ret; | |
1382 | struct consumer_output output = { 0 }; | |
1383 | xmlNodePtr consumer_output_node; | |
1b08cbce JR |
1384 | const char *control_uri = NULL; |
1385 | const char *data_uri = NULL; | |
1386 | const char *path = NULL; | |
dcf266c0 JG |
1387 | |
1388 | assert(name); | |
dcf266c0 JG |
1389 | |
1390 | if (output_node) { | |
1391 | consumer_output_node = xmlFirstElementChild(output_node); | |
1392 | if (!consumer_output_node) { | |
1393 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1394 | goto end; | |
1395 | } | |
1396 | ||
1397 | if (strcmp((const char *) consumer_output_node->name, | |
1398 | config_element_consumer_output)) { | |
1399 | WARN("Invalid output type, expected %s node", | |
1400 | config_element_consumer_output); | |
1401 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1402 | goto end; | |
1403 | } | |
1404 | ||
1405 | ret = process_consumer_output(consumer_output_node, &output); | |
1406 | if (ret) { | |
1407 | goto end; | |
1408 | } | |
1409 | } | |
1410 | ||
21a3f144 JR |
1411 | control_uri = output.control_uri; |
1412 | data_uri = output.data_uri; | |
1413 | path = output.path; | |
1414 | ||
1b08cbce JR |
1415 | /* Check for override and apply them */ |
1416 | if (overrides) { | |
1417 | if (overrides->path_url) { | |
1b08cbce | 1418 | path = overrides->path_url; |
21a3f144 JR |
1419 | /* control/data_uri are null */; |
1420 | control_uri = NULL; | |
1421 | data_uri = NULL; | |
1b08cbce JR |
1422 | } else { |
1423 | if (overrides->ctrl_url) { | |
1b08cbce | 1424 | control_uri = overrides->ctrl_url; |
21a3f144 JR |
1425 | /* path is null */ |
1426 | path = NULL; | |
1b08cbce JR |
1427 | } |
1428 | if (overrides->data_url) { | |
1b08cbce | 1429 | data_uri = overrides->data_url; |
21a3f144 JR |
1430 | /* path is null */ |
1431 | path = NULL; | |
1b08cbce JR |
1432 | } |
1433 | } | |
1b08cbce JR |
1434 | } |
1435 | ||
21a3f144 | 1436 | |
1b08cbce | 1437 | if (live_timer_interval != UINT64_MAX && !control_uri && !data_uri) { |
dcf266c0 JG |
1438 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
1439 | goto end; | |
1440 | } | |
1441 | ||
1b08cbce | 1442 | if (control_uri || data_uri) { |
dcf266c0 JG |
1443 | /* network destination */ |
1444 | if (live_timer_interval && live_timer_interval != UINT64_MAX) { | |
b664f89a DG |
1445 | /* |
1446 | * URLs are provided for sure since the test above make sure that | |
1447 | * with a live timer the data and control URIs are provided. So, | |
1448 | * NULL is passed here and will be set right after. | |
1449 | */ | |
1450 | ret = lttng_create_session_live(name, NULL, live_timer_interval); | |
dcf266c0 JG |
1451 | } else { |
1452 | ret = lttng_create_session(name, NULL); | |
1453 | } | |
1454 | if (ret) { | |
1455 | goto end; | |
1456 | } | |
1457 | ||
1b08cbce | 1458 | ret = create_session_net_output(name, control_uri, data_uri); |
95681498 JG |
1459 | if (ret) { |
1460 | goto end; | |
dcf266c0 | 1461 | } |
95681498 | 1462 | |
dcf266c0 JG |
1463 | } else { |
1464 | /* either local output or no output */ | |
1b08cbce | 1465 | ret = lttng_create_session(name, path); |
dcf266c0 JG |
1466 | if (ret) { |
1467 | goto end; | |
1468 | } | |
1469 | } | |
1470 | end: | |
1471 | free(output.path); | |
1472 | free(output.control_uri); | |
1473 | free(output.data_uri); | |
1474 | return ret; | |
1475 | } | |
c1e83fb4 FD |
1476 | |
1477 | static | |
1478 | struct lttng_userspace_probe_location * | |
1479 | process_userspace_probe_function_attribute_node( | |
1480 | xmlNodePtr attribute_node) | |
1481 | { | |
1482 | xmlChar *content; | |
1483 | xmlNodePtr function_attribute_node; | |
1484 | char *function_name = NULL, *binary_path = NULL, *lookup_method_name; | |
1485 | struct lttng_userspace_probe_location *location = NULL; | |
1486 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
1487 | ||
1488 | /* | |
1489 | * Process userspace probe location function attributes. The order of | |
1490 | * the fields are not guaranteed so we need to iterate over all fields | |
1491 | * and check at the end if everything we need for this location type is | |
1492 | * there. | |
1493 | */ | |
1494 | for (function_attribute_node = | |
1495 | xmlFirstElementChild(attribute_node); | |
1496 | function_attribute_node; | |
1497 | function_attribute_node = xmlNextElementSibling( | |
1498 | function_attribute_node)) { | |
1499 | /* Handle function name, binary path and lookup method. */ | |
1500 | if (!strcmp((const char *) function_attribute_node->name, | |
1501 | config_element_userspace_probe_function_location_function_name)) { | |
1502 | content = xmlNodeGetContent(function_attribute_node); | |
1503 | if (!content) { | |
1504 | goto error; | |
1505 | } | |
1506 | ||
1507 | function_name = lttng_strndup((char *) content, LTTNG_SYMBOL_NAME_LEN); | |
1508 | free(content); | |
1509 | if (!function_name) { | |
1510 | PERROR("Error duplicating function name"); | |
1511 | goto error; | |
1512 | } | |
1513 | } else if (!strcmp((const char *) function_attribute_node->name, | |
1514 | config_element_userspace_probe_location_binary_path)) { | |
1515 | content = xmlNodeGetContent(function_attribute_node); | |
1516 | if (!content) { | |
1517 | goto error; | |
1518 | } | |
1519 | ||
1520 | binary_path = lttng_strndup((char *) content, LTTNG_PATH_MAX); | |
1521 | free(content); | |
1522 | if (!binary_path) { | |
1523 | PERROR("Error duplicating binary path"); | |
1524 | goto error; | |
1525 | } | |
1526 | } else if (!strcmp((const char *) function_attribute_node->name, | |
1527 | config_element_userspace_probe_lookup)) { | |
1528 | content = xmlNodeGetContent(function_attribute_node); | |
1529 | if (!content) { | |
1530 | goto error; | |
1531 | } | |
1532 | ||
1533 | lookup_method_name = lttng_strndup((char *) content, | |
1534 | CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN); | |
1535 | free(content); | |
1536 | if (!lookup_method_name) { | |
1537 | PERROR("Error duplicating lookup method name"); | |
1538 | goto error; | |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * function_default lookup method defaults to | |
1543 | * function_elf lookup method at the moment. | |
1544 | */ | |
1545 | if (!strcmp(lookup_method_name, config_element_userspace_probe_lookup_function_elf) | |
1546 | || !strcmp(lookup_method_name, config_element_userspace_probe_lookup_function_default)) { | |
1547 | lookup_method = lttng_userspace_probe_location_lookup_method_function_elf_create(); | |
1548 | if (!lookup_method) { | |
1549 | PERROR("Error creating function default/ELF lookup method"); | |
1550 | free(lookup_method_name); | |
1551 | goto error; | |
1552 | } | |
1553 | } else { | |
1554 | WARN("Unknown function lookup method."); | |
1555 | free(lookup_method_name); | |
1556 | goto error; | |
1557 | } | |
1558 | } else { | |
1559 | goto error; | |
1560 | } | |
1561 | ||
1562 | /* Check if all the necessary fields were found. */ | |
1563 | if (binary_path && function_name && lookup_method) { | |
1564 | location = | |
1565 | lttng_userspace_probe_location_function_create( | |
1566 | binary_path, function_name, | |
1567 | lookup_method); | |
1568 | goto end; | |
1569 | } | |
1570 | } | |
1571 | error: | |
1572 | free(binary_path); | |
1573 | free(function_name); | |
1574 | if (lookup_method) { | |
1575 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
1576 | } | |
1577 | end: | |
1578 | return location; | |
1579 | } | |
1580 | ||
1581 | static | |
1582 | struct lttng_userspace_probe_location * | |
1583 | process_userspace_probe_tracepoint_attribute_node( | |
1584 | xmlNodePtr attribute_node) | |
1585 | { | |
1586 | xmlChar *content; | |
1587 | xmlNodePtr tracepoint_attribute_node; | |
1588 | char *lookup_method_name = NULL; | |
1589 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; | |
1590 | struct lttng_userspace_probe_location *location = NULL; | |
1591 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
1592 | ||
1593 | /* | |
1594 | * Process userspace probe location tracepoint attributes. The order of | |
1595 | * the fields are not guaranteed so we need to iterate over all fields | |
1596 | * and check at the end if everything we need for this location type is | |
1597 | * there. | |
1598 | */ | |
1599 | for (tracepoint_attribute_node = | |
1600 | xmlFirstElementChild(attribute_node); tracepoint_attribute_node; | |
1601 | tracepoint_attribute_node = xmlNextElementSibling( | |
1602 | tracepoint_attribute_node)) { | |
1603 | if (!strcmp((const char *) tracepoint_attribute_node->name, | |
1604 | config_element_userspace_probe_tracepoint_location_probe_name)) { | |
1605 | content = xmlNodeGetContent(tracepoint_attribute_node); | |
1606 | if (!content) { | |
1607 | goto error; | |
1608 | } | |
1609 | ||
1610 | probe_name = lttng_strndup((char*) content, LTTNG_SYMBOL_NAME_LEN); | |
1611 | free(content); | |
1612 | if (!probe_name) { | |
1613 | PERROR("Error duplicating probe name"); | |
1614 | goto error; | |
1615 | } | |
1616 | } else if (!strcmp((const char *) tracepoint_attribute_node->name, | |
1617 | config_element_userspace_probe_tracepoint_location_provider_name)) { | |
1618 | content = xmlNodeGetContent(tracepoint_attribute_node); | |
1619 | if (!content) { | |
1620 | goto error; | |
1621 | } | |
1622 | ||
1623 | provider_name = lttng_strndup((char*) content, LTTNG_SYMBOL_NAME_LEN); | |
1624 | free(content); | |
1625 | if (!provider_name) { | |
1626 | PERROR("Error duplicating provider name"); | |
1627 | goto error; | |
1628 | } | |
1629 | } else if (!strcmp((const char *) tracepoint_attribute_node->name, | |
1630 | config_element_userspace_probe_location_binary_path)) { | |
1631 | content = xmlNodeGetContent(tracepoint_attribute_node); | |
1632 | if (!content) { | |
1633 | goto error; | |
1634 | } | |
1635 | ||
1636 | binary_path = lttng_strndup((char*) content, LTTNG_PATH_MAX); | |
1637 | ||
1638 | free(content); | |
1639 | ||
1640 | if (!binary_path) { | |
1641 | PERROR("Error duplicating binary path"); | |
1642 | goto error; | |
1643 | } | |
1644 | } else if (!strcmp((const char *) tracepoint_attribute_node->name, | |
1645 | config_element_userspace_probe_lookup)) { | |
1646 | content = xmlNodeGetContent(tracepoint_attribute_node); | |
1647 | if (!content) { | |
1648 | goto error; | |
1649 | } | |
1650 | ||
1651 | lookup_method_name = lttng_strndup((char *) content, | |
1652 | CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN); | |
1653 | free(content); | |
1654 | ||
1655 | if (!lookup_method_name) { | |
1656 | PERROR("Error duplicating lookup method name"); | |
1657 | goto error; | |
1658 | } | |
1659 | ||
1660 | if (!strcmp(lookup_method_name, | |
1661 | config_element_userspace_probe_lookup_tracepoint_sdt)) { | |
1662 | lookup_method = | |
1663 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); | |
1664 | if (!lookup_method) { | |
1665 | PERROR("Error creating tracepoint SDT lookup method"); | |
1666 | free(lookup_method_name); | |
1667 | goto error; | |
1668 | } | |
1669 | } else { | |
1670 | WARN("Unknown tracepoint lookup method."); | |
1671 | goto error; | |
1672 | } | |
1673 | } else { | |
1674 | WARN("Unknown tracepoint attribute."); | |
1675 | goto error; | |
1676 | } | |
1677 | ||
1678 | /* Check if all the necessary fields were found. */ | |
1679 | if (binary_path && provider_name && probe_name && lookup_method) { | |
1680 | location = | |
1681 | lttng_userspace_probe_location_tracepoint_create( | |
1682 | binary_path, provider_name, | |
1683 | probe_name, lookup_method); | |
1684 | goto end; | |
1685 | } | |
1686 | } | |
1687 | error: | |
1688 | free(binary_path); | |
1689 | free(probe_name); | |
1690 | free(provider_name); | |
1691 | if (lookup_method) { | |
1692 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
1693 | } | |
1694 | end: | |
1695 | return location; | |
1696 | } | |
1697 | ||
dcf266c0 JG |
1698 | static |
1699 | int process_probe_attribute_node(xmlNodePtr probe_attribute_node, | |
1700 | struct lttng_event_probe_attr *attr) | |
1701 | { | |
1702 | int ret; | |
1703 | ||
1704 | assert(probe_attribute_node); | |
1705 | assert(attr); | |
1706 | ||
1707 | if (!strcmp((const char *) probe_attribute_node->name, | |
1708 | config_element_address)) { | |
1709 | xmlChar *content; | |
1710 | uint64_t addr = 0; | |
1711 | ||
1712 | /* addr */ | |
1713 | content = xmlNodeGetContent(probe_attribute_node); | |
1714 | if (!content) { | |
1715 | ret = -LTTNG_ERR_NOMEM; | |
1716 | goto end; | |
1717 | } | |
1718 | ||
1719 | ret = parse_uint(content, &addr); | |
1720 | free(content); | |
1721 | if (ret) { | |
1722 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1723 | goto end; | |
1724 | } | |
1725 | ||
1726 | attr->addr = addr; | |
1727 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1728 | config_element_offset)) { | |
1729 | xmlChar *content; | |
1730 | uint64_t offset = 0; | |
1731 | ||
1732 | /* offset */ | |
1733 | content = xmlNodeGetContent(probe_attribute_node); | |
1734 | if (!content) { | |
1735 | ret = -LTTNG_ERR_NOMEM; | |
1736 | goto end; | |
1737 | } | |
1738 | ||
1739 | ret = parse_uint(content, &offset); | |
1740 | free(content); | |
1741 | if (ret) { | |
1742 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1743 | goto end; | |
1744 | } | |
1745 | ||
1746 | attr->offset = offset; | |
1747 | } else if (!strcmp((const char *) probe_attribute_node->name, | |
1748 | config_element_symbol_name)) { | |
1749 | xmlChar *content; | |
dcf266c0 JG |
1750 | |
1751 | /* symbol_name */ | |
1752 | content = xmlNodeGetContent(probe_attribute_node); | |
1753 | if (!content) { | |
1754 | ret = -LTTNG_ERR_NOMEM; | |
1755 | goto end; | |
1756 | } | |
1757 | ||
d2e67842 JG |
1758 | ret = lttng_strncpy(attr->symbol_name, |
1759 | (const char *) content, | |
1760 | LTTNG_SYMBOL_NAME_LEN); | |
1761 | if (ret == -1) { | |
1762 | ERR("symbol name \"%s\"'s length (%zu) exceeds the maximal permitted length (%d) in session configuration", | |
1763 | (const char *) content, | |
1764 | strlen((const char *) content), | |
1765 | LTTNG_SYMBOL_NAME_LEN); | |
dcf266c0 JG |
1766 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
1767 | free(content); | |
1768 | goto end; | |
1769 | } | |
dcf266c0 JG |
1770 | free(content); |
1771 | } | |
1772 | ret = 0; | |
1773 | end: | |
1774 | return ret; | |
1775 | } | |
1776 | ||
1777 | static | |
1778 | int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle, | |
d7b645e2 | 1779 | const char *channel_name, const enum process_event_node_phase phase) |
dcf266c0 | 1780 | { |
d7b645e2 | 1781 | int ret = 0, i; |
dcf266c0 | 1782 | xmlNodePtr node; |
91744e14 | 1783 | struct lttng_event *event; |
dcf266c0 JG |
1784 | char **exclusions = NULL; |
1785 | unsigned long exclusion_count = 0; | |
1786 | char *filter_expression = NULL; | |
1787 | ||
1788 | assert(event_node); | |
1789 | assert(handle); | |
1790 | assert(channel_name); | |
1791 | ||
91744e14 FD |
1792 | event = lttng_event_create(); |
1793 | if (!event) { | |
1794 | ret = -LTTNG_ERR_NOMEM; | |
1795 | goto end; | |
1796 | } | |
dcf266c0 | 1797 | |
f40eba3d JG |
1798 | /* Initialize default log level which varies by domain */ |
1799 | switch (handle->domain.type) | |
1800 | { | |
1801 | case LTTNG_DOMAIN_JUL: | |
91744e14 | 1802 | event->loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
f40eba3d JG |
1803 | break; |
1804 | case LTTNG_DOMAIN_LOG4J: | |
91744e14 | 1805 | event->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; |
f40eba3d JG |
1806 | break; |
1807 | case LTTNG_DOMAIN_PYTHON: | |
91744e14 | 1808 | event->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; |
f40eba3d JG |
1809 | break; |
1810 | case LTTNG_DOMAIN_UST: | |
1811 | case LTTNG_DOMAIN_KERNEL: | |
91744e14 | 1812 | event->loglevel = LTTNG_LOGLEVEL_DEBUG; |
f40eba3d JG |
1813 | break; |
1814 | default: | |
1815 | assert(0); | |
1816 | } | |
1817 | ||
dcf266c0 JG |
1818 | for (node = xmlFirstElementChild(event_node); node; |
1819 | node = xmlNextElementSibling(node)) { | |
1820 | if (!strcmp((const char *) node->name, config_element_name)) { | |
1821 | xmlChar *content; | |
dcf266c0 JG |
1822 | |
1823 | /* name */ | |
1824 | content = xmlNodeGetContent(node); | |
1825 | if (!content) { | |
1826 | ret = -LTTNG_ERR_NOMEM; | |
1827 | goto end; | |
1828 | } | |
1829 | ||
91744e14 | 1830 | ret = lttng_strncpy(event->name, |
d2e67842 JG |
1831 | (const char *) content, |
1832 | LTTNG_SYMBOL_NAME_LEN); | |
1833 | if (ret == -1) { | |
1834 | WARN("Event \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration", | |
1835 | (const char *) content, | |
1836 | strlen((const char *) content), | |
1837 | LTTNG_SYMBOL_NAME_LEN); | |
dcf266c0 JG |
1838 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
1839 | free(content); | |
1840 | goto end; | |
1841 | } | |
dcf266c0 JG |
1842 | free(content); |
1843 | } else if (!strcmp((const char *) node->name, | |
1844 | config_element_enabled)) { | |
1845 | xmlChar *content = xmlNodeGetContent(node); | |
1846 | ||
1847 | /* enabled */ | |
1848 | if (!content) { | |
1849 | ret = -LTTNG_ERR_NOMEM; | |
1850 | goto end; | |
1851 | } | |
1852 | ||
91744e14 | 1853 | ret = parse_bool(content, &event->enabled); |
dcf266c0 JG |
1854 | free(content); |
1855 | if (ret) { | |
1856 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1857 | goto end; | |
1858 | } | |
1859 | } else if (!strcmp((const char *) node->name, | |
1860 | config_element_type)) { | |
1861 | xmlChar *content = xmlNodeGetContent(node); | |
1862 | ||
1863 | /* type */ | |
1864 | if (!content) { | |
1865 | ret = -LTTNG_ERR_NOMEM; | |
1866 | goto end; | |
1867 | } | |
1868 | ||
1869 | ret = get_event_type(content); | |
1870 | free(content); | |
1871 | if (ret < 0) { | |
1872 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1873 | goto end; | |
1874 | } | |
1875 | ||
91744e14 | 1876 | event->type = ret; |
dcf266c0 JG |
1877 | } else if (!strcmp((const char *) node->name, |
1878 | config_element_loglevel_type)) { | |
1879 | xmlChar *content = xmlNodeGetContent(node); | |
1880 | ||
1881 | /* loglevel_type */ | |
1882 | if (!content) { | |
1883 | ret = -LTTNG_ERR_NOMEM; | |
1884 | goto end; | |
1885 | } | |
1886 | ||
1887 | ret = get_loglevel_type(content); | |
1888 | free(content); | |
1889 | if (ret < 0) { | |
1890 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1891 | goto end; | |
1892 | } | |
1893 | ||
91744e14 | 1894 | event->loglevel_type = ret; |
dcf266c0 JG |
1895 | } else if (!strcmp((const char *) node->name, |
1896 | config_element_loglevel)) { | |
1897 | xmlChar *content; | |
1898 | int64_t loglevel = 0; | |
1899 | ||
1900 | /* loglevel */ | |
1901 | content = xmlNodeGetContent(node); | |
1902 | if (!content) { | |
1903 | ret = -LTTNG_ERR_NOMEM; | |
1904 | goto end; | |
1905 | } | |
1906 | ||
1907 | ret = parse_int(content, &loglevel); | |
1908 | free(content); | |
1909 | if (ret) { | |
1910 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1911 | goto end; | |
1912 | } | |
1913 | ||
1914 | if (loglevel > INT_MAX || loglevel < INT_MIN) { | |
1915 | WARN("loglevel out of range."); | |
1916 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1917 | goto end; | |
1918 | } | |
1919 | ||
91744e14 | 1920 | event->loglevel = loglevel; |
dcf266c0 JG |
1921 | } else if (!strcmp((const char *) node->name, |
1922 | config_element_filter)) { | |
1923 | xmlChar *content = | |
1924 | xmlNodeGetContent(node); | |
1925 | ||
1926 | /* filter */ | |
1927 | if (!content) { | |
1928 | ret = -LTTNG_ERR_NOMEM; | |
1929 | goto end; | |
1930 | } | |
1931 | ||
02d8ac3d | 1932 | free(filter_expression); |
dcf266c0 JG |
1933 | filter_expression = strdup((char *) content); |
1934 | free(content); | |
1935 | if (!filter_expression) { | |
1936 | ret = -LTTNG_ERR_NOMEM; | |
1937 | goto end; | |
1938 | } | |
1939 | } else if (!strcmp((const char *) node->name, | |
1940 | config_element_exclusions)) { | |
1941 | xmlNodePtr exclusion_node; | |
1942 | int exclusion_index = 0; | |
1943 | ||
1944 | /* exclusions */ | |
1945 | if (exclusions) { | |
1946 | /* | |
1947 | * Exclusions has already been initialized, | |
1948 | * invalid file. | |
1949 | */ | |
1950 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1951 | goto end; | |
1952 | } | |
1953 | ||
1954 | exclusion_count = xmlChildElementCount(node); | |
1955 | if (!exclusion_count) { | |
1956 | continue; | |
1957 | } | |
1958 | ||
1959 | exclusions = zmalloc(exclusion_count * sizeof(char *)); | |
1960 | if (!exclusions) { | |
1961 | exclusion_count = 0; | |
1962 | ret = -LTTNG_ERR_NOMEM; | |
1963 | goto end; | |
1964 | } | |
1965 | ||
1966 | for (exclusion_node = xmlFirstElementChild(node); exclusion_node; | |
1967 | exclusion_node = xmlNextElementSibling(exclusion_node)) { | |
1968 | xmlChar *content = | |
1969 | xmlNodeGetContent(exclusion_node); | |
1970 | ||
1971 | if (!content) { | |
1972 | ret = -LTTNG_ERR_NOMEM; | |
1973 | goto end; | |
1974 | } | |
1975 | ||
1976 | exclusions[exclusion_index] = strdup((const char *) content); | |
1977 | free(content); | |
1978 | if (!exclusions[exclusion_index]) { | |
1979 | ret = -LTTNG_ERR_NOMEM; | |
1980 | goto end; | |
1981 | } | |
1982 | exclusion_index++; | |
1983 | } | |
1984 | ||
91744e14 | 1985 | event->exclusion = 1; |
dcf266c0 JG |
1986 | } else if (!strcmp((const char *) node->name, |
1987 | config_element_attributes)) { | |
1988 | xmlNodePtr attribute_node = xmlFirstElementChild(node); | |
1989 | ||
1990 | /* attributes */ | |
1991 | if (!attribute_node) { | |
1992 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
1993 | goto end; | |
1994 | } | |
1995 | ||
c1e83fb4 | 1996 | if (!strcmp((const char *) attribute_node->name, |
dcf266c0 JG |
1997 | config_element_probe_attributes)) { |
1998 | xmlNodePtr probe_attribute_node; | |
1999 | ||
2000 | /* probe_attributes */ | |
2001 | for (probe_attribute_node = | |
2002 | xmlFirstElementChild(attribute_node); probe_attribute_node; | |
2003 | probe_attribute_node = xmlNextElementSibling( | |
2004 | probe_attribute_node)) { | |
2005 | ||
2006 | ret = process_probe_attribute_node(probe_attribute_node, | |
91744e14 | 2007 | &event->attr.probe); |
dcf266c0 JG |
2008 | if (ret) { |
2009 | goto end; | |
2010 | } | |
2011 | } | |
c1e83fb4 FD |
2012 | } else if (!strcmp((const char *) attribute_node->name, |
2013 | config_element_function_attributes)) { | |
dcf266c0 JG |
2014 | size_t sym_len; |
2015 | xmlChar *content; | |
2016 | xmlNodePtr symbol_node = xmlFirstElementChild(attribute_node); | |
2017 | ||
2018 | /* function_attributes */ | |
2019 | content = xmlNodeGetContent(symbol_node); | |
2020 | if (!content) { | |
2021 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2022 | goto end; | |
2023 | } | |
2024 | ||
2025 | sym_len = strlen((char *) content); | |
2026 | if (sym_len >= LTTNG_SYMBOL_NAME_LEN) { | |
2027 | WARN("Function name too long."); | |
2028 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2029 | free(content); | |
2030 | goto end; | |
2031 | } | |
2032 | ||
d2e67842 | 2033 | ret = lttng_strncpy( |
91744e14 | 2034 | event->attr.ftrace.symbol_name, |
d2e67842 JG |
2035 | (char *) content, sym_len); |
2036 | if (ret == -1) { | |
2037 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2038 | free(content); | |
2039 | goto end; | |
2040 | } | |
dcf266c0 | 2041 | free(content); |
c1e83fb4 FD |
2042 | } else if (!strcmp((const char *) attribute_node->name, |
2043 | config_element_userspace_probe_tracepoint_attributes)) { | |
2044 | struct lttng_userspace_probe_location *location; | |
2045 | ||
2046 | location = process_userspace_probe_tracepoint_attribute_node(attribute_node); | |
2047 | if (!location) { | |
2048 | WARN("Error processing userspace probe tracepoint attribute"); | |
2049 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2050 | goto end; | |
2051 | } | |
2052 | ret = lttng_event_set_userspace_probe_location( | |
2053 | event, location); | |
2054 | if (ret) { | |
2055 | WARN("Error setting userspace probe location field"); | |
2056 | lttng_userspace_probe_location_destroy( | |
2057 | location); | |
2058 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2059 | goto end; | |
2060 | } | |
2061 | } else if (!strcmp((const char *) attribute_node->name, | |
2062 | config_element_userspace_probe_function_attributes)) { | |
2063 | struct lttng_userspace_probe_location *location; | |
2064 | ||
2065 | location = | |
2066 | process_userspace_probe_function_attribute_node( | |
2067 | attribute_node); | |
2068 | if (!location) { | |
2069 | WARN("Error processing userspace probe function attribute"); | |
2070 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2071 | goto end; | |
2072 | } | |
2073 | ||
2074 | ret = lttng_event_set_userspace_probe_location( | |
2075 | event, location); | |
2076 | if (ret) { | |
2077 | WARN("Error setting userspace probe location field"); | |
2078 | lttng_userspace_probe_location_destroy( | |
2079 | location); | |
2080 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2081 | goto end; | |
2082 | } | |
2083 | } else { | |
2084 | /* Unknown event attribute. */ | |
2085 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2086 | goto end; | |
dcf266c0 JG |
2087 | } |
2088 | } | |
2089 | } | |
2090 | ||
91744e14 FD |
2091 | if ((event->enabled && phase == ENABLE) || phase == CREATION) { |
2092 | ret = lttng_enable_event_with_exclusions(handle, event, channel_name, | |
d7b645e2 JR |
2093 | filter_expression, exclusion_count, exclusions); |
2094 | if (ret < 0) { | |
91744e14 | 2095 | WARN("Enabling event (name:%s) on load failed.", event->name); |
d7b645e2 JR |
2096 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
2097 | goto end; | |
2098 | } | |
065321e9 | 2099 | } |
d2e67842 | 2100 | ret = 0; |
dcf266c0 JG |
2101 | end: |
2102 | for (i = 0; i < exclusion_count; i++) { | |
2103 | free(exclusions[i]); | |
2104 | } | |
2105 | ||
2106 | free(exclusions); | |
2107 | free(filter_expression); | |
2108 | return ret; | |
2109 | } | |
2110 | ||
2111 | static | |
2112 | int process_events_node(xmlNodePtr events_node, struct lttng_handle *handle, | |
2113 | const char *channel_name) | |
2114 | { | |
2115 | int ret = 0; | |
d7b645e2 | 2116 | struct lttng_event event; |
dcf266c0 JG |
2117 | xmlNodePtr node; |
2118 | ||
2119 | assert(events_node); | |
2120 | assert(handle); | |
2121 | assert(channel_name); | |
2122 | ||
2123 | for (node = xmlFirstElementChild(events_node); node; | |
2124 | node = xmlNextElementSibling(node)) { | |
d7b645e2 | 2125 | ret = process_event_node(node, handle, channel_name, CREATION); |
dcf266c0 JG |
2126 | if (ret) { |
2127 | goto end; | |
2128 | } | |
2129 | } | |
d7b645e2 JR |
2130 | |
2131 | /* | |
2132 | * Disable all events to enable only the necessary events. | |
2133 | * Limitations regarding lttng_disable_events and tuple descriptor | |
2134 | * force this approach. | |
2135 | */ | |
2136 | memset(&event, 0, sizeof(event)); | |
2137 | event.loglevel = -1; | |
2138 | event.type = LTTNG_EVENT_ALL; | |
2139 | ret = lttng_disable_event_ext(handle, &event, channel_name, NULL); | |
2140 | if (ret) { | |
2141 | goto end; | |
2142 | } | |
2143 | ||
2144 | for (node = xmlFirstElementChild(events_node); node; | |
2145 | node = xmlNextElementSibling(node)) { | |
2146 | ret = process_event_node(node, handle, channel_name, ENABLE); | |
2147 | if (ret) { | |
2148 | goto end; | |
2149 | } | |
2150 | } | |
2151 | ||
dcf266c0 JG |
2152 | end: |
2153 | return ret; | |
2154 | } | |
2155 | ||
2156 | static | |
2157 | int process_channel_attr_node(xmlNodePtr attr_node, | |
2158 | struct lttng_channel *channel, xmlNodePtr *contexts_node, | |
2159 | xmlNodePtr *events_node) | |
2160 | { | |
2161 | int ret; | |
2162 | ||
2163 | assert(attr_node); | |
2164 | assert(channel); | |
2165 | assert(contexts_node); | |
2166 | assert(events_node); | |
2167 | ||
2168 | if (!strcmp((const char *) attr_node->name, config_element_name)) { | |
2169 | xmlChar *content; | |
dcf266c0 JG |
2170 | |
2171 | /* name */ | |
2172 | content = xmlNodeGetContent(attr_node); | |
2173 | if (!content) { | |
2174 | ret = -LTTNG_ERR_NOMEM; | |
2175 | goto end; | |
2176 | } | |
2177 | ||
d2e67842 JG |
2178 | ret = lttng_strncpy(channel->name, |
2179 | (const char *) content, | |
2180 | LTTNG_SYMBOL_NAME_LEN); | |
2181 | if (ret == -1) { | |
2182 | WARN("Channel \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration", | |
2183 | (const char *) content, | |
2184 | strlen((const char *) content), | |
2185 | LTTNG_SYMBOL_NAME_LEN); | |
dcf266c0 JG |
2186 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
2187 | free(content); | |
2188 | goto end; | |
2189 | } | |
dcf266c0 JG |
2190 | free(content); |
2191 | } else if (!strcmp((const char *) attr_node->name, | |
2192 | config_element_enabled)) { | |
2193 | xmlChar *content; | |
2194 | int enabled; | |
2195 | ||
2196 | /* enabled */ | |
2197 | content = xmlNodeGetContent(attr_node); | |
2198 | if (!content) { | |
2199 | ret = -LTTNG_ERR_NOMEM; | |
2200 | goto end; | |
2201 | } | |
2202 | ||
2203 | ret = parse_bool(content, &enabled); | |
2204 | free(content); | |
2205 | if (ret) { | |
2206 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2207 | goto end; | |
2208 | } | |
2209 | ||
2210 | channel->enabled = enabled; | |
2211 | } else if (!strcmp((const char *) attr_node->name, | |
2212 | config_element_overwrite_mode)) { | |
2213 | xmlChar *content; | |
2214 | ||
2215 | /* overwrite_mode */ | |
2216 | content = xmlNodeGetContent(attr_node); | |
2217 | if (!content) { | |
2218 | ret = -LTTNG_ERR_NOMEM; | |
2219 | goto end; | |
2220 | } | |
2221 | ||
2222 | ret = get_overwrite_mode(content); | |
2223 | free(content); | |
2224 | if (ret < 0) { | |
2225 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2226 | goto end; | |
2227 | } | |
2228 | ||
2229 | channel->attr.overwrite = ret; | |
2230 | } else if (!strcmp((const char *) attr_node->name, | |
2231 | config_element_subbuf_size)) { | |
2232 | xmlChar *content; | |
2233 | ||
2234 | /* subbuffer_size */ | |
2235 | content = xmlNodeGetContent(attr_node); | |
2236 | if (!content) { | |
2237 | ret = -LTTNG_ERR_NOMEM; | |
2238 | goto end; | |
2239 | } | |
2240 | ||
2241 | ret = parse_uint(content, &channel->attr.subbuf_size); | |
2242 | free(content); | |
2243 | if (ret) { | |
2244 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2245 | goto end; | |
2246 | } | |
2247 | } else if (!strcmp((const char *) attr_node->name, | |
2248 | config_element_num_subbuf)) { | |
2249 | xmlChar *content; | |
2250 | ||
2251 | /* subbuffer_count */ | |
2252 | content = xmlNodeGetContent(attr_node); | |
2253 | if (!content) { | |
2254 | ret = -LTTNG_ERR_NOMEM; | |
2255 | goto end; | |
2256 | } | |
2257 | ||
2258 | ret = parse_uint(content, &channel->attr.num_subbuf); | |
2259 | free(content); | |
2260 | if (ret) { | |
2261 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2262 | goto end; | |
2263 | } | |
2264 | } else if (!strcmp((const char *) attr_node->name, | |
2265 | config_element_switch_timer_interval)) { | |
2266 | xmlChar *content; | |
2267 | uint64_t switch_timer_interval = 0; | |
2268 | ||
2269 | /* switch_timer_interval */ | |
2270 | content = xmlNodeGetContent(attr_node); | |
2271 | if (!content) { | |
2272 | ret = -LTTNG_ERR_NOMEM; | |
2273 | goto end; | |
2274 | } | |
2275 | ||
2276 | ret = parse_uint(content, &switch_timer_interval); | |
2277 | free(content); | |
2278 | if (ret) { | |
2279 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2280 | goto end; | |
2281 | } | |
2282 | ||
2283 | if (switch_timer_interval > UINT_MAX) { | |
2284 | WARN("switch_timer_interval out of range."); | |
2285 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2286 | goto end; | |
2287 | } | |
2288 | ||
2289 | channel->attr.switch_timer_interval = | |
2290 | switch_timer_interval; | |
2291 | } else if (!strcmp((const char *) attr_node->name, | |
2292 | config_element_read_timer_interval)) { | |
2293 | xmlChar *content; | |
2294 | uint64_t read_timer_interval = 0; | |
2295 | ||
2296 | /* read_timer_interval */ | |
2297 | content = xmlNodeGetContent(attr_node); | |
2298 | if (!content) { | |
2299 | ret = -LTTNG_ERR_NOMEM; | |
2300 | goto end; | |
2301 | } | |
2302 | ||
2303 | ret = parse_uint(content, &read_timer_interval); | |
2304 | free(content); | |
2305 | if (ret) { | |
2306 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2307 | goto end; | |
2308 | } | |
2309 | ||
2310 | if (read_timer_interval > UINT_MAX) { | |
2311 | WARN("read_timer_interval out of range."); | |
2312 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2313 | goto end; | |
2314 | } | |
2315 | ||
2316 | channel->attr.read_timer_interval = | |
2317 | read_timer_interval; | |
2318 | } else if (!strcmp((const char *) attr_node->name, | |
2319 | config_element_output_type)) { | |
2320 | xmlChar *content; | |
2321 | ||
2322 | /* output_type */ | |
2323 | content = xmlNodeGetContent(attr_node); | |
2324 | if (!content) { | |
2325 | ret = -LTTNG_ERR_NOMEM; | |
2326 | goto end; | |
2327 | } | |
2328 | ||
2329 | ret = get_output_type(content); | |
2330 | free(content); | |
2331 | if (ret < 0) { | |
2332 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2333 | goto end; | |
2334 | } | |
2335 | ||
2336 | channel->attr.output = ret; | |
2337 | } else if (!strcmp((const char *) attr_node->name, | |
2338 | config_element_tracefile_size)) { | |
2339 | xmlChar *content; | |
2340 | ||
2341 | /* tracefile_size */ | |
2342 | content = xmlNodeGetContent(attr_node); | |
2343 | if (!content) { | |
2344 | ret = -LTTNG_ERR_NOMEM; | |
2345 | goto end; | |
2346 | } | |
2347 | ||
2348 | ret = parse_uint(content, &channel->attr.tracefile_size); | |
2349 | free(content); | |
2350 | if (ret) { | |
2351 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2352 | goto end; | |
2353 | } | |
2354 | } else if (!strcmp((const char *) attr_node->name, | |
2355 | config_element_tracefile_count)) { | |
2356 | xmlChar *content; | |
2357 | ||
2358 | /* tracefile_count */ | |
2359 | content = xmlNodeGetContent(attr_node); | |
2360 | if (!content) { | |
2361 | ret = -LTTNG_ERR_NOMEM; | |
2362 | goto end; | |
2363 | } | |
2364 | ||
2365 | ret = parse_uint(content, &channel->attr.tracefile_count); | |
2366 | free(content); | |
2367 | if (ret) { | |
2368 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2369 | goto end; | |
2370 | } | |
2371 | } else if (!strcmp((const char *) attr_node->name, | |
2372 | config_element_live_timer_interval)) { | |
2373 | xmlChar *content; | |
2374 | uint64_t live_timer_interval = 0; | |
2375 | ||
2376 | /* live_timer_interval */ | |
2377 | content = xmlNodeGetContent(attr_node); | |
2378 | if (!content) { | |
2379 | ret = -LTTNG_ERR_NOMEM; | |
2380 | goto end; | |
2381 | } | |
2382 | ||
2383 | ret = parse_uint(content, &live_timer_interval); | |
2384 | free(content); | |
2385 | if (ret) { | |
2386 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2387 | goto end; | |
2388 | } | |
2389 | ||
2390 | if (live_timer_interval > UINT_MAX) { | |
2391 | WARN("live_timer_interval out of range."); | |
2392 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2393 | goto end; | |
2394 | } | |
2395 | ||
2396 | channel->attr.live_timer_interval = | |
2397 | live_timer_interval; | |
4fc2b126 JR |
2398 | } else if (!strcmp((const char *) attr_node->name, |
2399 | config_element_monitor_timer_interval)) { | |
2400 | xmlChar *content; | |
2401 | uint64_t monitor_timer_interval = 0; | |
2402 | ||
2403 | /* monitor_timer_interval */ | |
2404 | content = xmlNodeGetContent(attr_node); | |
2405 | if (!content) { | |
2406 | ret = -LTTNG_ERR_NOMEM; | |
2407 | goto end; | |
2408 | } | |
2409 | ||
2410 | ret = parse_uint(content, &monitor_timer_interval); | |
2411 | free(content); | |
2412 | if (ret) { | |
2413 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2414 | goto end; | |
2415 | } | |
2416 | ||
2417 | ret = lttng_channel_set_monitor_timer_interval(channel, | |
2418 | monitor_timer_interval); | |
2419 | if (ret) { | |
2420 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2421 | goto end; | |
2422 | } | |
275472aa JR |
2423 | } else if (!strcmp((const char *) attr_node->name, |
2424 | config_element_blocking_timeout)) { | |
2425 | xmlChar *content; | |
2426 | int64_t blocking_timeout = 0; | |
2427 | ||
2428 | /* blocking_timeout */ | |
2429 | content = xmlNodeGetContent(attr_node); | |
2430 | if (!content) { | |
2431 | ret = -LTTNG_ERR_NOMEM; | |
2432 | goto end; | |
2433 | } | |
2434 | ||
2435 | ret = parse_int(content, &blocking_timeout); | |
2436 | free(content); | |
2437 | if (ret) { | |
2438 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2439 | goto end; | |
2440 | } | |
2441 | ||
2442 | ret = lttng_channel_set_blocking_timeout(channel, | |
2443 | blocking_timeout); | |
2444 | if (ret) { | |
2445 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2446 | goto end; | |
2447 | } | |
dcf266c0 JG |
2448 | } else if (!strcmp((const char *) attr_node->name, |
2449 | config_element_events)) { | |
2450 | /* events */ | |
2451 | *events_node = attr_node; | |
2452 | } else { | |
2453 | /* contexts */ | |
2454 | *contexts_node = attr_node; | |
2455 | } | |
2456 | ret = 0; | |
2457 | end: | |
2458 | return ret; | |
2459 | } | |
2460 | ||
2461 | static | |
2462 | int process_context_node(xmlNodePtr context_node, | |
2463 | struct lttng_handle *handle, const char *channel_name) | |
2464 | { | |
2465 | int ret; | |
2466 | struct lttng_event_context context; | |
2467 | xmlNodePtr context_child_node = xmlFirstElementChild(context_node); | |
2468 | ||
2469 | assert(handle); | |
2470 | assert(channel_name); | |
2471 | ||
2472 | if (!context_child_node) { | |
2473 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2474 | goto end; | |
2475 | } | |
2476 | ||
2477 | memset(&context, 0, sizeof(context)); | |
2478 | ||
2479 | if (!strcmp((const char *) context_child_node->name, | |
2480 | config_element_type)) { | |
2481 | /* type */ | |
2482 | xmlChar *content = xmlNodeGetContent(context_child_node); | |
045fc617 | 2483 | |
dcf266c0 JG |
2484 | if (!content) { |
2485 | ret = -LTTNG_ERR_NOMEM; | |
2486 | goto end; | |
2487 | } | |
2488 | ||
2489 | ret = get_context_type(content); | |
2490 | free(content); | |
2491 | if (ret < 0) { | |
2492 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2493 | goto end; | |
2494 | } | |
2495 | ||
2496 | context.ctx = ret; | |
045fc617 JG |
2497 | } else if (!strcmp((const char *) context_child_node->name, |
2498 | config_element_context_perf)) { | |
2499 | /* perf */ | |
dcf266c0 JG |
2500 | xmlNodePtr perf_attr_node; |
2501 | ||
14ce5bd8 JG |
2502 | context.ctx = handle->domain.type == LTTNG_DOMAIN_KERNEL ? |
2503 | LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER : | |
2504 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER; | |
dcf266c0 JG |
2505 | for (perf_attr_node = xmlFirstElementChild(context_child_node); |
2506 | perf_attr_node; perf_attr_node = | |
2507 | xmlNextElementSibling(perf_attr_node)) { | |
2508 | if (!strcmp((const char *) perf_attr_node->name, | |
2509 | config_element_type)) { | |
2510 | xmlChar *content; | |
2511 | uint64_t type = 0; | |
2512 | ||
2513 | /* type */ | |
2514 | content = xmlNodeGetContent(perf_attr_node); | |
2515 | if (!content) { | |
2516 | ret = -LTTNG_ERR_NOMEM; | |
2517 | goto end; | |
2518 | } | |
2519 | ||
2520 | ret = parse_uint(content, &type); | |
2521 | free(content); | |
2522 | if (ret) { | |
2523 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2524 | goto end; | |
2525 | } | |
2526 | ||
2527 | if (type > UINT32_MAX) { | |
2528 | WARN("perf context type out of range."); | |
2529 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2530 | goto end; | |
2531 | } | |
2532 | ||
2533 | context.u.perf_counter.type = type; | |
2534 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2535 | config_element_config)) { | |
2536 | xmlChar *content; | |
2537 | uint64_t config = 0; | |
2538 | ||
2539 | /* config */ | |
2540 | content = xmlNodeGetContent(perf_attr_node); | |
2541 | if (!content) { | |
2542 | ret = -LTTNG_ERR_NOMEM; | |
2543 | goto end; | |
2544 | } | |
2545 | ||
2546 | ret = parse_uint(content, &config); | |
2547 | free(content); | |
2548 | if (ret) { | |
2549 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2550 | goto end; | |
2551 | } | |
2552 | ||
2553 | context.u.perf_counter.config = config; | |
2554 | } else if (!strcmp((const char *) perf_attr_node->name, | |
2555 | config_element_name)) { | |
2556 | xmlChar *content; | |
dcf266c0 JG |
2557 | |
2558 | /* name */ | |
2559 | content = xmlNodeGetContent(perf_attr_node); | |
2560 | if (!content) { | |
2561 | ret = -LTTNG_ERR_NOMEM; | |
2562 | goto end; | |
2563 | } | |
2564 | ||
d2e67842 JG |
2565 | ret = lttng_strncpy(context.u.perf_counter.name, |
2566 | (const char *) content, | |
2567 | LTTNG_SYMBOL_NAME_LEN); | |
2568 | if (ret == -1) { | |
2569 | WARN("Perf counter \"%s\"'s name length (%zu) exceeds the maximal permitted length (%d) in session configuration", | |
2570 | (const char *) content, | |
2571 | strlen((const char *) content), | |
2572 | LTTNG_SYMBOL_NAME_LEN); | |
dcf266c0 JG |
2573 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
2574 | free(content); | |
2575 | goto end; | |
2576 | } | |
dcf266c0 JG |
2577 | free(content); |
2578 | } | |
2579 | } | |
045fc617 JG |
2580 | } else if (!strcmp((const char *) context_child_node->name, |
2581 | config_element_context_app)) { | |
2582 | /* application context */ | |
2583 | xmlNodePtr app_ctx_node; | |
2584 | ||
2585 | context.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
2586 | for (app_ctx_node = xmlFirstElementChild(context_child_node); | |
2587 | app_ctx_node; app_ctx_node = | |
2588 | xmlNextElementSibling(app_ctx_node)) { | |
2589 | xmlChar *content; | |
2590 | char **target = strcmp( | |
2591 | (const char *) app_ctx_node->name, | |
2592 | config_element_context_app_provider_name) == 0 ? | |
2593 | &context.u.app_ctx.provider_name : | |
2594 | &context.u.app_ctx.ctx_name; | |
2595 | ||
2596 | content = xmlNodeGetContent(app_ctx_node); | |
2597 | if (!content) { | |
2598 | ret = -LTTNG_ERR_NOMEM; | |
2599 | goto end; | |
2600 | } | |
2601 | ||
2602 | *target = (char *) content; | |
2603 | } | |
2604 | } else { | |
2605 | /* Unrecognized context type */ | |
2606 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2607 | goto end; | |
dcf266c0 JG |
2608 | } |
2609 | ||
2610 | ret = lttng_add_context(handle, &context, NULL, channel_name); | |
045fc617 JG |
2611 | if (context.ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2612 | free(context.u.app_ctx.provider_name); | |
2613 | free(context.u.app_ctx.ctx_name); | |
2614 | } | |
dcf266c0 JG |
2615 | end: |
2616 | return ret; | |
2617 | } | |
2618 | ||
2619 | static | |
2620 | int process_contexts_node(xmlNodePtr contexts_node, | |
2621 | struct lttng_handle *handle, const char *channel_name) | |
2622 | { | |
2623 | int ret = 0; | |
2624 | xmlNodePtr context_node; | |
2625 | ||
2626 | for (context_node = xmlFirstElementChild(contexts_node); context_node; | |
2627 | context_node = xmlNextElementSibling(context_node)) { | |
2628 | ret = process_context_node(context_node, handle, channel_name); | |
2629 | if (ret) { | |
2630 | goto end; | |
2631 | } | |
2632 | } | |
2633 | end: | |
2634 | return ret; | |
2635 | } | |
2636 | ||
847a5916 JR |
2637 | static |
2638 | int process_pid_tracker_node(xmlNodePtr pid_tracker_node, | |
2639 | struct lttng_handle *handle) | |
2640 | { | |
dd49e13f | 2641 | int ret = 0, child; |
847a5916 JR |
2642 | xmlNodePtr targets_node = NULL; |
2643 | xmlNodePtr node; | |
2644 | ||
2645 | assert(handle); | |
2646 | assert(pid_tracker_node); | |
2647 | /* get the targets node */ | |
2648 | for (node = xmlFirstElementChild(pid_tracker_node); node; | |
2649 | node = xmlNextElementSibling(node)) { | |
2650 | if (!strcmp((const char *) node->name, | |
2651 | config_element_targets)) { | |
2652 | targets_node = node; | |
2653 | break; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | if (!targets_node) { | |
2658 | ret = LTTNG_ERR_INVALID; | |
2659 | goto end; | |
2660 | } | |
2661 | ||
2662 | /* Go through all pid_target node */ | |
2663 | child = xmlChildElementCount(targets_node); | |
2664 | if (child == 0) { | |
2665 | /* The session is explicitly set to target nothing. */ | |
2666 | ret = lttng_untrack_pid(handle, -1); | |
2667 | if (ret) { | |
2668 | goto end; | |
2669 | } | |
2670 | } | |
2671 | for (node = xmlFirstElementChild(targets_node); node; | |
2672 | node = xmlNextElementSibling(node)) { | |
2673 | xmlNodePtr pid_target_node = node; | |
2674 | ||
2675 | /* get pid node and track it */ | |
2676 | for (node = xmlFirstElementChild(pid_target_node); node; | |
2677 | node = xmlNextElementSibling(node)) { | |
2678 | if (!strcmp((const char *) node->name, | |
2679 | config_element_pid)) { | |
2680 | int64_t pid; | |
2681 | xmlChar *content = NULL; | |
2682 | ||
2683 | content = xmlNodeGetContent(node); | |
2684 | if (!content) { | |
2685 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2686 | goto end; | |
2687 | } | |
2688 | ||
2689 | ret = parse_int(content, &pid); | |
2690 | free(content); | |
2691 | if (ret) { | |
2692 | ret = LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2693 | goto end; | |
2694 | } | |
2695 | ||
2696 | ret = lttng_track_pid(handle, (int) pid); | |
2697 | if (ret) { | |
2698 | goto end; | |
2699 | } | |
2700 | } | |
2701 | } | |
2702 | node = pid_target_node; | |
2703 | } | |
2704 | ||
2705 | end: | |
2706 | return ret; | |
2707 | } | |
2708 | ||
dcf266c0 JG |
2709 | static |
2710 | int process_domain_node(xmlNodePtr domain_node, const char *session_name) | |
2711 | { | |
2712 | int ret; | |
2713 | struct lttng_domain domain = { 0 }; | |
2714 | struct lttng_handle *handle = NULL; | |
4fc2b126 | 2715 | struct lttng_channel *channel = NULL; |
dcf266c0 | 2716 | xmlNodePtr channels_node = NULL; |
847a5916 JR |
2717 | xmlNodePtr trackers_node = NULL; |
2718 | xmlNodePtr pid_tracker_node = NULL; | |
dcf266c0 JG |
2719 | xmlNodePtr node; |
2720 | ||
2721 | assert(session_name); | |
2722 | ||
2723 | ret = init_domain(domain_node, &domain); | |
2724 | if (ret) { | |
2725 | goto end; | |
2726 | } | |
2727 | ||
2728 | handle = lttng_create_handle(session_name, &domain); | |
2729 | if (!handle) { | |
2730 | ret = -LTTNG_ERR_NOMEM; | |
2731 | goto end; | |
2732 | } | |
2733 | ||
2734 | /* get the channels node */ | |
2735 | for (node = xmlFirstElementChild(domain_node); node; | |
2736 | node = xmlNextElementSibling(node)) { | |
2737 | if (!strcmp((const char *) node->name, | |
2738 | config_element_channels)) { | |
2739 | channels_node = node; | |
2740 | break; | |
2741 | } | |
2742 | } | |
2743 | ||
2744 | if (!channels_node) { | |
2745 | goto end; | |
2746 | } | |
2747 | ||
2748 | /* create all channels */ | |
2749 | for (node = xmlFirstElementChild(channels_node); node; | |
2750 | node = xmlNextElementSibling(node)) { | |
36d1687c | 2751 | const enum lttng_domain_type original_domain = domain.type; |
dcf266c0 JG |
2752 | xmlNodePtr contexts_node = NULL; |
2753 | xmlNodePtr events_node = NULL; | |
2754 | xmlNodePtr channel_attr_node; | |
2755 | ||
36d1687c JG |
2756 | /* |
2757 | * Channels of the "agent" types cannot be created directly. | |
2758 | * They are meant to be created implicitly through the | |
2759 | * activation of events in their domain. However, a user | |
2760 | * can override the default channel configuration attributes | |
2761 | * by creating the underlying UST channel _before_ enabling | |
2762 | * an agent domain event. | |
2763 | * | |
2764 | * Hence, the channel's type is substituted before the creation | |
2765 | * and restored by the time the events are created. | |
2766 | */ | |
2767 | switch (domain.type) { | |
2768 | case LTTNG_DOMAIN_JUL: | |
2769 | case LTTNG_DOMAIN_LOG4J: | |
2770 | case LTTNG_DOMAIN_PYTHON: | |
2771 | domain.type = LTTNG_DOMAIN_UST; | |
2772 | default: | |
2773 | break; | |
2774 | } | |
2775 | ||
4fc2b126 JR |
2776 | channel = lttng_channel_create(&domain); |
2777 | if (!channel) { | |
2778 | ret = -1; | |
2779 | goto end; | |
2780 | } | |
dcf266c0 JG |
2781 | |
2782 | for (channel_attr_node = xmlFirstElementChild(node); | |
2783 | channel_attr_node; channel_attr_node = | |
2784 | xmlNextElementSibling(channel_attr_node)) { | |
2785 | ret = process_channel_attr_node(channel_attr_node, | |
4fc2b126 | 2786 | channel, &contexts_node, &events_node); |
dcf266c0 JG |
2787 | if (ret) { |
2788 | goto end; | |
2789 | } | |
2790 | } | |
2791 | ||
4fc2b126 | 2792 | ret = lttng_enable_channel(handle, channel); |
dcf266c0 JG |
2793 | if (ret < 0) { |
2794 | goto end; | |
2795 | } | |
2796 | ||
36d1687c JG |
2797 | /* Restore the original channel domain. */ |
2798 | domain.type = original_domain; | |
2799 | ||
4fc2b126 | 2800 | ret = process_events_node(events_node, handle, channel->name); |
dcf266c0 JG |
2801 | if (ret) { |
2802 | goto end; | |
2803 | } | |
2804 | ||
2805 | ret = process_contexts_node(contexts_node, handle, | |
4fc2b126 | 2806 | channel->name); |
dcf266c0 JG |
2807 | if (ret) { |
2808 | goto end; | |
2809 | } | |
4fc2b126 JR |
2810 | |
2811 | lttng_channel_destroy(channel); | |
dcf266c0 | 2812 | } |
4fc2b126 | 2813 | channel = NULL; |
847a5916 JR |
2814 | |
2815 | /* get the trackers node */ | |
2816 | for (node = xmlFirstElementChild(domain_node); node; | |
2817 | node = xmlNextElementSibling(node)) { | |
2818 | if (!strcmp((const char *) node->name, | |
2819 | config_element_trackers)) { | |
2820 | trackers_node = node; | |
2821 | break; | |
2822 | } | |
2823 | } | |
2824 | ||
2825 | if (!trackers_node) { | |
2826 | goto end; | |
2827 | } | |
2828 | ||
2829 | for (node = xmlFirstElementChild(trackers_node); node; | |
2830 | node = xmlNextElementSibling(node)) { | |
2831 | if (!strcmp((const char *)node->name,config_element_pid_tracker)) { | |
2832 | pid_tracker_node = node; | |
2833 | ret = process_pid_tracker_node(pid_tracker_node, handle); | |
2834 | if (ret) { | |
2835 | goto end; | |
2836 | } | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | if (!pid_tracker_node) { | |
2841 | lttng_track_pid(handle, -1); | |
2842 | } | |
2843 | ||
dcf266c0 | 2844 | end: |
4fc2b126 | 2845 | lttng_channel_destroy(channel); |
dcf266c0 JG |
2846 | lttng_destroy_handle(handle); |
2847 | return ret; | |
2848 | } | |
2849 | ||
66ea93b1 JG |
2850 | static |
2851 | int add_periodic_rotation(const char *name, uint64_t time_us) | |
2852 | { | |
2853 | int ret; | |
2854 | enum lttng_rotation_status status; | |
2855 | struct lttng_rotation_schedule *periodic = | |
2856 | lttng_rotation_schedule_periodic_create(); | |
2857 | ||
2858 | if (!periodic) { | |
2859 | ret = -LTTNG_ERR_NOMEM; | |
2860 | goto error; | |
2861 | } | |
2862 | ||
2863 | status = lttng_rotation_schedule_periodic_set_period(periodic, | |
2864 | time_us); | |
2865 | if (status != LTTNG_ROTATION_STATUS_OK) { | |
2866 | ret = -LTTNG_ERR_INVALID; | |
2867 | goto error; | |
2868 | } | |
2869 | ||
2870 | status = lttng_session_add_rotation_schedule(name, periodic); | |
2871 | switch (status) { | |
2872 | case LTTNG_ROTATION_STATUS_OK: | |
ce6176f2 | 2873 | ret = 0; |
66ea93b1 JG |
2874 | break; |
2875 | case LTTNG_ROTATION_STATUS_SCHEDULE_ALREADY_SET: | |
2876 | case LTTNG_ROTATION_STATUS_INVALID: | |
2877 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2878 | break; | |
2879 | default: | |
2880 | ret = -LTTNG_ERR_UNK; | |
2881 | break; | |
2882 | } | |
2883 | error: | |
2884 | lttng_rotation_schedule_destroy(periodic); | |
2885 | return ret; | |
2886 | } | |
2887 | ||
2888 | static | |
2889 | int add_size_rotation(const char *name, uint64_t size_bytes) | |
2890 | { | |
2891 | int ret; | |
2892 | enum lttng_rotation_status status; | |
2893 | struct lttng_rotation_schedule *size = | |
2894 | lttng_rotation_schedule_size_threshold_create(); | |
2895 | ||
2896 | if (!size) { | |
2897 | ret = -LTTNG_ERR_NOMEM; | |
2898 | goto error; | |
2899 | } | |
2900 | ||
2901 | status = lttng_rotation_schedule_size_threshold_set_threshold(size, | |
2902 | size_bytes); | |
2903 | if (status != LTTNG_ROTATION_STATUS_OK) { | |
2904 | ret = -LTTNG_ERR_INVALID; | |
2905 | goto error; | |
2906 | } | |
2907 | ||
2908 | status = lttng_session_add_rotation_schedule(name, size); | |
2909 | switch (status) { | |
2910 | case LTTNG_ROTATION_STATUS_OK: | |
ce6176f2 | 2911 | ret = 0; |
66ea93b1 JG |
2912 | break; |
2913 | case LTTNG_ROTATION_STATUS_SCHEDULE_ALREADY_SET: | |
2914 | case LTTNG_ROTATION_STATUS_INVALID: | |
2915 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2916 | break; | |
2917 | default: | |
2918 | ret = -LTTNG_ERR_UNK; | |
2919 | break; | |
2920 | } | |
2921 | error: | |
2922 | lttng_rotation_schedule_destroy(size); | |
2923 | return ret; | |
2924 | } | |
2925 | ||
ce6176f2 JG |
2926 | static |
2927 | int process_session_rotation_schedules_node( | |
2928 | xmlNodePtr schedules_node, | |
2929 | uint64_t *rotation_timer_interval, | |
2930 | uint64_t *rotation_size) | |
2931 | { | |
2932 | int ret = 0; | |
2933 | xmlNodePtr child; | |
2934 | ||
2935 | for (child = xmlFirstElementChild(schedules_node); | |
2936 | child; | |
2937 | child = xmlNextElementSibling(child)) { | |
2938 | if (!strcmp((const char *) child->name, | |
2939 | config_element_rotation_schedule_periodic)) { | |
2940 | xmlChar *content; | |
2941 | xmlNodePtr time_us_node; | |
2942 | ||
2943 | /* periodic rotation schedule */ | |
2944 | time_us_node = xmlFirstElementChild(child); | |
2945 | if (!time_us_node || | |
2946 | strcmp((const char *) time_us_node->name, | |
2947 | config_element_rotation_schedule_periodic_time_us)) { | |
2948 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2949 | goto end; | |
2950 | } | |
2951 | ||
2952 | /* time_us child */ | |
2953 | content = xmlNodeGetContent(time_us_node); | |
2954 | if (!content) { | |
2955 | ret = -LTTNG_ERR_NOMEM; | |
2956 | goto end; | |
2957 | } | |
2958 | ret = parse_uint(content, rotation_timer_interval); | |
2959 | free(content); | |
2960 | if (ret) { | |
2961 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2962 | goto end; | |
2963 | } | |
2964 | } else if (!strcmp((const char *) child->name, | |
2965 | config_element_rotation_schedule_size_threshold)) { | |
2966 | xmlChar *content; | |
2967 | xmlNodePtr bytes_node; | |
2968 | ||
2969 | /* size_threshold rotation schedule */ | |
2970 | bytes_node = xmlFirstElementChild(child); | |
2971 | if (!bytes_node || | |
2972 | strcmp((const char *) bytes_node->name, | |
2973 | config_element_rotation_schedule_size_threshold_bytes)) { | |
2974 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2975 | goto end; | |
2976 | } | |
2977 | ||
2978 | /* bytes child */ | |
2979 | content = xmlNodeGetContent(bytes_node); | |
2980 | if (!content) { | |
2981 | ret = -LTTNG_ERR_NOMEM; | |
2982 | goto end; | |
2983 | } | |
2984 | ret = parse_uint(content, rotation_size); | |
2985 | free(content); | |
2986 | if (ret) { | |
2987 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
2988 | goto end; | |
2989 | } | |
2990 | } | |
2991 | } | |
2992 | ||
2993 | end: | |
2994 | return ret; | |
2995 | } | |
2996 | ||
dcf266c0 JG |
2997 | static |
2998 | int process_session_node(xmlNodePtr session_node, const char *session_name, | |
1b08cbce JR |
2999 | int overwrite, |
3000 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
3001 | { |
3002 | int ret, started = -1, snapshot_mode = -1; | |
259c2674 | 3003 | uint64_t live_timer_interval = UINT64_MAX, |
90936dcf JD |
3004 | rotation_timer_interval = 0, |
3005 | rotation_size = 0; | |
d324faf7 | 3006 | xmlChar *name = NULL; |
9e7c9f56 | 3007 | xmlChar *shm_path = NULL; |
dcf266c0 JG |
3008 | xmlNodePtr domains_node = NULL; |
3009 | xmlNodePtr output_node = NULL; | |
3010 | xmlNodePtr node; | |
90936dcf | 3011 | xmlNodePtr attributes_child; |
dcf266c0 JG |
3012 | struct lttng_domain *kernel_domain = NULL; |
3013 | struct lttng_domain *ust_domain = NULL; | |
3014 | struct lttng_domain *jul_domain = NULL; | |
5cdb6027 | 3015 | struct lttng_domain *log4j_domain = NULL; |
0e115563 | 3016 | struct lttng_domain *python_domain = NULL; |
dcf266c0 JG |
3017 | |
3018 | for (node = xmlFirstElementChild(session_node); node; | |
3019 | node = xmlNextElementSibling(node)) { | |
3020 | if (!name && !strcmp((const char *) node->name, | |
3021 | config_element_name)) { | |
3022 | /* name */ | |
3023 | xmlChar *node_content = xmlNodeGetContent(node); | |
3024 | if (!node_content) { | |
3025 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 3026 | goto error; |
dcf266c0 JG |
3027 | } |
3028 | ||
d324faf7 | 3029 | name = node_content; |
dcf266c0 JG |
3030 | } else if (!domains_node && !strcmp((const char *) node->name, |
3031 | config_element_domains)) { | |
3032 | /* domains */ | |
3033 | domains_node = node; | |
3034 | } else if (started == -1 && !strcmp((const char *) node->name, | |
3035 | config_element_started)) { | |
3036 | /* started */ | |
3037 | xmlChar *node_content = xmlNodeGetContent(node); | |
3038 | if (!node_content) { | |
3039 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 3040 | goto error; |
dcf266c0 JG |
3041 | } |
3042 | ||
3043 | ret = parse_bool(node_content, &started); | |
3044 | free(node_content); | |
3045 | if (ret) { | |
3046 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 3047 | goto error; |
dcf266c0 JG |
3048 | } |
3049 | } else if (!output_node && !strcmp((const char *) node->name, | |
3050 | config_element_output)) { | |
3051 | /* output */ | |
3052 | output_node = node; | |
9e7c9f56 JR |
3053 | } else if (!shm_path && !strcmp((const char *) node->name, |
3054 | config_element_shared_memory_path)) { | |
3055 | /* shared memory path */ | |
3056 | xmlChar *node_content = xmlNodeGetContent(node); | |
3057 | if (!node_content) { | |
3058 | ret = -LTTNG_ERR_NOMEM; | |
3059 | goto error; | |
3060 | } | |
3061 | ||
3062 | shm_path = node_content; | |
dcf266c0 | 3063 | } else { |
259c2674 JD |
3064 | /* |
3065 | * attributes, snapshot_mode, live_timer_interval, rotation_size, | |
90936dcf JD |
3066 | * rotation_timer_interval. |
3067 | */ | |
3068 | for (attributes_child = xmlFirstElementChild(node); attributes_child; | |
3069 | attributes_child = xmlNextElementSibling(attributes_child)) { | |
3070 | if (!strcmp((const char *) attributes_child->name, | |
3071 | config_element_snapshot_mode)) { | |
3072 | /* snapshot_mode */ | |
3073 | xmlChar *snapshot_mode_content = | |
3074 | xmlNodeGetContent(attributes_child); | |
3075 | if (!snapshot_mode_content) { | |
3076 | ret = -LTTNG_ERR_NOMEM; | |
3077 | goto error; | |
3078 | } | |
dcf266c0 | 3079 | |
90936dcf JD |
3080 | ret = parse_bool(snapshot_mode_content, &snapshot_mode); |
3081 | free(snapshot_mode_content); | |
3082 | if (ret) { | |
3083 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
3084 | goto error; | |
3085 | } | |
3086 | } else if (!strcmp((const char *) attributes_child->name, | |
3087 | config_element_live_timer_interval)) { | |
3088 | /* live_timer_interval */ | |
3089 | xmlChar *timer_interval_content = | |
3090 | xmlNodeGetContent(attributes_child); | |
3091 | if (!timer_interval_content) { | |
3092 | ret = -LTTNG_ERR_NOMEM; | |
3093 | goto error; | |
3094 | } | |
dcf266c0 | 3095 | |
90936dcf JD |
3096 | ret = parse_uint(timer_interval_content, &live_timer_interval); |
3097 | free(timer_interval_content); | |
3098 | if (ret) { | |
3099 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
3100 | goto error; | |
3101 | } | |
ce6176f2 JG |
3102 | } else if (!strcmp((const char *) attributes_child->name, |
3103 | config_element_rotation_schedules)) { | |
3104 | ret = process_session_rotation_schedules_node( | |
3105 | attributes_child, | |
3106 | &rotation_timer_interval, | |
3107 | &rotation_size); | |
90936dcf JD |
3108 | if (ret) { |
3109 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
3110 | goto error; | |
3111 | } | |
259c2674 | 3112 | |
259c2674 JD |
3113 | } |
3114 | } | |
dcf266c0 JG |
3115 | } |
3116 | } | |
3117 | ||
3118 | if (!name) { | |
3119 | /* Mandatory attribute, as defined in the session XSD */ | |
3120 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 3121 | goto error; |
dcf266c0 JG |
3122 | } |
3123 | ||
d324faf7 | 3124 | if (session_name && strcmp((char *) name, session_name)) { |
dcf266c0 | 3125 | /* This is not the session we are looking for */ |
c2da8cde DG |
3126 | ret = -LTTNG_ERR_NO_SESSION; |
3127 | goto error; | |
dcf266c0 JG |
3128 | } |
3129 | ||
3130 | /* Init domains to create the session handles */ | |
3131 | for (node = xmlFirstElementChild(domains_node); node; | |
3132 | node = xmlNextElementSibling(node)) { | |
3133 | struct lttng_domain *domain; | |
3134 | ||
3135 | domain = zmalloc(sizeof(*domain)); | |
3136 | if (!domain) { | |
3137 | ret = -LTTNG_ERR_NOMEM; | |
c2da8cde | 3138 | goto error; |
dcf266c0 JG |
3139 | } |
3140 | ||
3141 | ret = init_domain(node, domain); | |
3142 | if (ret) { | |
3143 | goto domain_init_error; | |
3144 | } | |
3145 | ||
3146 | switch (domain->type) { | |
3147 | case LTTNG_DOMAIN_KERNEL: | |
c33e6729 DG |
3148 | if (kernel_domain) { |
3149 | /* Same domain seen twice, invalid! */ | |
3150 | goto domain_init_error; | |
3151 | } | |
dcf266c0 JG |
3152 | kernel_domain = domain; |
3153 | break; | |
3154 | case LTTNG_DOMAIN_UST: | |
c33e6729 DG |
3155 | if (ust_domain) { |
3156 | /* Same domain seen twice, invalid! */ | |
3157 | goto domain_init_error; | |
3158 | } | |
dcf266c0 JG |
3159 | ust_domain = domain; |
3160 | break; | |
3161 | case LTTNG_DOMAIN_JUL: | |
c33e6729 DG |
3162 | if (jul_domain) { |
3163 | /* Same domain seen twice, invalid! */ | |
3164 | goto domain_init_error; | |
3165 | } | |
dcf266c0 JG |
3166 | jul_domain = domain; |
3167 | break; | |
5cdb6027 DG |
3168 | case LTTNG_DOMAIN_LOG4J: |
3169 | if (log4j_domain) { | |
3170 | /* Same domain seen twice, invalid! */ | |
3171 | goto domain_init_error; | |
3172 | } | |
3173 | log4j_domain = domain; | |
3174 | break; | |
0e115563 DG |
3175 | case LTTNG_DOMAIN_PYTHON: |
3176 | if (python_domain) { | |
3177 | /* Same domain seen twice, invalid! */ | |
3178 | goto domain_init_error; | |
3179 | } | |
3180 | python_domain = domain; | |
3181 | break; | |
dcf266c0 JG |
3182 | default: |
3183 | WARN("Invalid domain type"); | |
3184 | goto domain_init_error; | |
3185 | } | |
3186 | continue; | |
3187 | domain_init_error: | |
3188 | free(domain); | |
3189 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
c2da8cde | 3190 | goto error; |
dcf266c0 JG |
3191 | } |
3192 | ||
2aaf5fc7 JR |
3193 | /* Apply overrides */ |
3194 | if (overrides) { | |
3195 | if (overrides->session_name) { | |
3196 | xmlChar *name_override = xmlStrdup(BAD_CAST(overrides->session_name)); | |
3197 | if (!name_override) { | |
3198 | ret = -LTTNG_ERR_NOMEM; | |
3199 | goto error; | |
3200 | } | |
3201 | ||
3202 | /* Overrides the session name to the provided name */ | |
3203 | xmlFree(name); | |
3204 | name = name_override; | |
3205 | } | |
3206 | } | |
3207 | ||
40b4155f | 3208 | if (overwrite) { |
dcf266c0 | 3209 | /* Destroy session if it exists */ |
d324faf7 | 3210 | ret = lttng_destroy_session((const char *) name); |
dcf266c0 JG |
3211 | if (ret && ret != -LTTNG_ERR_SESS_NOT_FOUND) { |
3212 | ERR("Failed to destroy existing session."); | |
c2da8cde | 3213 | goto error; |
dcf266c0 JG |
3214 | } |
3215 | } | |
3216 | ||
3217 | /* Create session type depending on output type */ | |
3218 | if (snapshot_mode && snapshot_mode != -1) { | |
1b08cbce JR |
3219 | ret = create_snapshot_session((const char *) name, output_node, |
3220 | overrides); | |
dcf266c0 JG |
3221 | } else if (live_timer_interval && |
3222 | live_timer_interval != UINT64_MAX) { | |
194dfca0 | 3223 | ret = create_session((const char *) name, |
1b08cbce | 3224 | output_node, live_timer_interval, overrides); |
dcf266c0 JG |
3225 | } else { |
3226 | /* regular session */ | |
194dfca0 | 3227 | ret = create_session((const char *) name, |
1b08cbce | 3228 | output_node, UINT64_MAX, overrides); |
dcf266c0 | 3229 | } |
dcf266c0 | 3230 | if (ret) { |
c2da8cde | 3231 | goto error; |
dcf266c0 JG |
3232 | } |
3233 | ||
9e7c9f56 JR |
3234 | if (shm_path) { |
3235 | ret = lttng_set_session_shm_path((const char *) name, | |
d324faf7 | 3236 | (const char *) shm_path); |
9e7c9f56 JR |
3237 | if (ret) { |
3238 | goto error; | |
3239 | } | |
3240 | } | |
3241 | ||
dcf266c0 JG |
3242 | for (node = xmlFirstElementChild(domains_node); node; |
3243 | node = xmlNextElementSibling(node)) { | |
d324faf7 | 3244 | ret = process_domain_node(node, (const char *) name); |
dcf266c0 JG |
3245 | if (ret) { |
3246 | goto end; | |
3247 | } | |
3248 | } | |
3249 | ||
66ea93b1 JG |
3250 | if (rotation_timer_interval) { |
3251 | ret = add_periodic_rotation((const char *) name, | |
3252 | rotation_timer_interval); | |
3253 | if (ret < 0) { | |
259c2674 JD |
3254 | goto error; |
3255 | } | |
66ea93b1 JG |
3256 | } |
3257 | if (rotation_size) { | |
3258 | ret = add_size_rotation((const char *) name, | |
dbd512ea | 3259 | rotation_size); |
66ea93b1 | 3260 | if (ret < 0) { |
259c2674 JD |
3261 | goto error; |
3262 | } | |
3263 | } | |
3264 | ||
dcf266c0 | 3265 | if (started) { |
d324faf7 | 3266 | ret = lttng_start_tracing((const char *) name); |
dcf266c0 JG |
3267 | if (ret) { |
3268 | goto end; | |
3269 | } | |
3270 | } | |
c2da8cde | 3271 | |
dcf266c0 | 3272 | end: |
b2579dc1 | 3273 | if (ret < 0) { |
d324faf7 JG |
3274 | ERR("Failed to load session %s: %s", (const char *) name, |
3275 | lttng_strerror(ret)); | |
3276 | lttng_destroy_session((const char *) name); | |
b2579dc1 JG |
3277 | } |
3278 | ||
c2da8cde | 3279 | error: |
dcf266c0 JG |
3280 | free(kernel_domain); |
3281 | free(ust_domain); | |
3282 | free(jul_domain); | |
5cdb6027 | 3283 | free(log4j_domain); |
135a3893 | 3284 | free(python_domain); |
d324faf7 | 3285 | xmlFree(name); |
9e7c9f56 | 3286 | xmlFree(shm_path); |
dcf266c0 JG |
3287 | return ret; |
3288 | } | |
3289 | ||
cf53c06d DG |
3290 | /* |
3291 | * Return 1 if the given path is readable by the current UID or 0 if not. | |
3292 | * Return -1 if the path is EPERM. | |
3293 | */ | |
3294 | static int validate_file_read_creds(const char *path) | |
3295 | { | |
3296 | int ret; | |
3297 | ||
3298 | assert(path); | |
3299 | ||
3300 | /* Can we read the file. */ | |
3301 | ret = access(path, R_OK); | |
3302 | if (!ret) { | |
3303 | goto valid; | |
3304 | } | |
3305 | if (errno == EACCES) { | |
3306 | return -1; | |
3307 | } else { | |
3308 | /* Invalid. */ | |
3309 | return 0; | |
3310 | } | |
3311 | valid: | |
3312 | return 1; | |
3313 | } | |
3314 | ||
dcf266c0 JG |
3315 | static |
3316 | int load_session_from_file(const char *path, const char *session_name, | |
1b08cbce JR |
3317 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
3318 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
3319 | { |
3320 | int ret, session_found = !session_name; | |
3321 | xmlDocPtr doc = NULL; | |
3322 | xmlNodePtr sessions_node; | |
3323 | xmlNodePtr session_node; | |
dcf266c0 JG |
3324 | |
3325 | assert(path); | |
3326 | assert(validation_ctx); | |
3327 | ||
cf53c06d DG |
3328 | ret = validate_file_read_creds(path); |
3329 | if (ret != 1) { | |
3330 | if (ret == -1) { | |
3331 | ret = -LTTNG_ERR_EPERM; | |
3332 | } else { | |
3333 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
3334 | } | |
dcf266c0 JG |
3335 | goto end; |
3336 | } | |
3337 | ||
3338 | doc = xmlParseFile(path); | |
3339 | if (!doc) { | |
3340 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
3341 | goto end; | |
3342 | } | |
3343 | ||
3344 | ret = xmlSchemaValidateDoc(validation_ctx->schema_validation_ctx, doc); | |
3345 | if (ret) { | |
3346 | ERR("Session configuration file validation failed"); | |
3347 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; | |
3348 | goto end; | |
3349 | } | |
3350 | ||
3351 | sessions_node = xmlDocGetRootElement(doc); | |
3352 | if (!sessions_node) { | |
3353 | goto end; | |
3354 | } | |
3355 | ||
3356 | for (session_node = xmlFirstElementChild(sessions_node); | |
3357 | session_node; session_node = | |
3358 | xmlNextElementSibling(session_node)) { | |
3359 | ret = process_session_node(session_node, | |
1b08cbce | 3360 | session_name, overwrite, overrides); |
dcf266c0 JG |
3361 | if (session_name && ret == 0) { |
3362 | /* Target session found and loaded */ | |
3363 | session_found = 1; | |
3364 | break; | |
3365 | } | |
3366 | } | |
3367 | end: | |
3368 | xmlFreeDoc(doc); | |
3369 | if (!ret) { | |
a96bc65d | 3370 | ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT; |
dcf266c0 JG |
3371 | } |
3372 | return ret; | |
3373 | } | |
3374 | ||
3375 | static | |
3376 | int load_session_from_path(const char *path, const char *session_name, | |
1b08cbce JR |
3377 | struct session_config_validation_ctx *validation_ctx, int overwrite, |
3378 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
3379 | { |
3380 | int ret, session_found = !session_name; | |
dcf266c0 | 3381 | DIR *directory = NULL; |
cce35f91 JG |
3382 | struct lttng_dynamic_buffer file_path; |
3383 | size_t path_len; | |
dcf266c0 JG |
3384 | |
3385 | assert(path); | |
3386 | assert(validation_ctx); | |
cce35f91 JG |
3387 | path_len = strlen(path); |
3388 | lttng_dynamic_buffer_init(&file_path); | |
3389 | if (path_len >= LTTNG_PATH_MAX) { | |
3390 | ERR("Session configuration load path \"%s\" length (%zu) exceeds the maximal length allowed (%d)", | |
3391 | path, path_len, LTTNG_PATH_MAX); | |
3392 | ret = -LTTNG_ERR_INVALID; | |
3393 | goto end; | |
3394 | } | |
dcf266c0 | 3395 | |
4af16958 DG |
3396 | directory = opendir(path); |
3397 | if (!directory) { | |
11143783 DG |
3398 | switch (errno) { |
3399 | case ENOTDIR: | |
0f0a81b5 DG |
3400 | /* Try the file loading. */ |
3401 | break; | |
11143783 DG |
3402 | case ENOENT: |
3403 | ret = -LTTNG_ERR_LOAD_SESSION_NOENT; | |
3404 | goto end; | |
3405 | default: | |
0f0a81b5 DG |
3406 | ret = -LTTNG_ERR_LOAD_IO_FAIL; |
3407 | goto end; | |
4af16958 | 3408 | } |
dcf266c0 | 3409 | } |
4af16958 | 3410 | if (directory) { |
cce35f91 | 3411 | size_t file_path_root_len; |
dcf266c0 | 3412 | |
cce35f91 JG |
3413 | ret = lttng_dynamic_buffer_set_capacity(&file_path, |
3414 | LTTNG_PATH_MAX); | |
3415 | if (ret) { | |
3416 | ret = -LTTNG_ERR_NOMEM; | |
dcf266c0 JG |
3417 | goto end; |
3418 | } | |
3419 | ||
cce35f91 JG |
3420 | ret = lttng_dynamic_buffer_append(&file_path, path, path_len); |
3421 | if (ret) { | |
dcf266c0 | 3422 | ret = -LTTNG_ERR_NOMEM; |
dcf266c0 JG |
3423 | goto end; |
3424 | } | |
3425 | ||
cce35f91 JG |
3426 | if (file_path.data[file_path.size - 1] != '/') { |
3427 | ret = lttng_dynamic_buffer_append(&file_path, "/", 1); | |
3428 | if (ret) { | |
3429 | ret = -LTTNG_ERR_NOMEM; | |
3430 | goto end; | |
3431 | } | |
dcf266c0 | 3432 | } |
cce35f91 | 3433 | file_path_root_len = file_path.size; |
dcf266c0 JG |
3434 | |
3435 | /* Search for *.lttng files */ | |
9a2df626 MJ |
3436 | for (;;) { |
3437 | size_t file_name_len; | |
3438 | struct dirent *result; | |
3439 | ||
3440 | /* | |
3441 | * When the end of the directory stream is reached, NULL | |
3442 | * is returned and errno is kept unchanged. When an | |
3443 | * error occurs, NULL is returned and errno is set | |
3444 | * accordingly. To distinguish between the two, set | |
3445 | * errno to zero before calling readdir(). | |
3446 | * | |
3447 | * On success, readdir() returns a pointer to a dirent | |
3448 | * structure. This structure may be statically | |
3449 | * allocated, do not attempt to free(3) it. | |
3450 | */ | |
3451 | errno = 0; | |
3452 | result = readdir(directory); | |
3453 | ||
ff86d8d0 | 3454 | /* Reached end of dir stream or error out. */ |
9a2df626 MJ |
3455 | if (!result) { |
3456 | if (errno) { | |
3457 | PERROR("Failed to enumerate the contents of path \"%s\" while loading session, readdir returned", path); | |
3458 | ret = -LTTNG_ERR_LOAD_IO_FAIL; | |
3459 | goto end; | |
3460 | } | |
3461 | break; | |
3462 | } | |
3463 | ||
3464 | file_name_len = strlen(result->d_name); | |
dcf266c0 JG |
3465 | |
3466 | if (file_name_len <= | |
3467 | sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION)) { | |
3468 | continue; | |
3469 | } | |
3470 | ||
cce35f91 JG |
3471 | if (file_path.size + file_name_len >= LTTNG_PATH_MAX) { |
3472 | WARN("Ignoring file \"%s\" since the path's length (%zu) would exceed the maximal permitted size (%d)", | |
3473 | result->d_name, | |
3474 | /* +1 to account for NULL terminator. */ | |
3475 | file_path.size + file_name_len + 1, | |
3476 | LTTNG_PATH_MAX); | |
dcf266c0 JG |
3477 | continue; |
3478 | } | |
3479 | ||
cce35f91 | 3480 | /* Does the file end with .lttng? */ |
dcf266c0 | 3481 | if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION, |
cce35f91 JG |
3482 | result->d_name + file_name_len - sizeof( |
3483 | DEFAULT_SESSION_CONFIG_FILE_EXTENSION) + 1)) { | |
dcf266c0 JG |
3484 | continue; |
3485 | } | |
3486 | ||
cce35f91 JG |
3487 | ret = lttng_dynamic_buffer_append(&file_path, result->d_name, |
3488 | file_name_len + 1); | |
3489 | if (ret) { | |
3490 | ret = -LTTNG_ERR_NOMEM; | |
3491 | goto end; | |
3492 | } | |
dcf266c0 | 3493 | |
cce35f91 | 3494 | ret = load_session_from_file(file_path.data, session_name, |
1b08cbce | 3495 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
3496 | if (session_name && !ret) { |
3497 | session_found = 1; | |
3498 | break; | |
3499 | } | |
cce35f91 JG |
3500 | /* |
3501 | * Reset the buffer's size to the location of the | |
3502 | * path's trailing '/'. | |
3503 | */ | |
3504 | ret = lttng_dynamic_buffer_set_size(&file_path, | |
3505 | file_path_root_len); | |
3506 | if (ret) { | |
3507 | ret = -LTTNG_ERR_UNK; | |
3508 | goto end; | |
3509 | } | |
dcf266c0 JG |
3510 | } |
3511 | ||
dcf266c0 JG |
3512 | } else { |
3513 | ret = load_session_from_file(path, session_name, | |
1b08cbce | 3514 | validation_ctx, overwrite, overrides); |
dcf266c0 JG |
3515 | if (ret) { |
3516 | goto end; | |
3517 | } else { | |
3518 | session_found = 1; | |
3519 | } | |
3520 | } | |
3521 | ||
3522 | end: | |
3523 | if (directory) { | |
3524 | if (closedir(directory)) { | |
3525 | PERROR("closedir"); | |
3526 | } | |
3527 | } | |
464133ea | 3528 | if (session_found && !ret) { |
6c66fa0f | 3529 | ret = 0; |
dcf266c0 | 3530 | } |
cce35f91 | 3531 | lttng_dynamic_buffer_reset(&file_path); |
dcf266c0 JG |
3532 | return ret; |
3533 | } | |
3534 | ||
ab38c13f DG |
3535 | /* |
3536 | * Validate that the given path's credentials and the current process have the | |
cf53c06d | 3537 | * same UID. If so, return 1 else return 0 if it does NOT match. |
ab38c13f DG |
3538 | */ |
3539 | static int validate_path_creds(const char *path) | |
3540 | { | |
3541 | int ret, uid = getuid(); | |
3542 | struct stat buf; | |
3543 | ||
3544 | assert(path); | |
3545 | ||
cf53c06d | 3546 | if (uid == 0) { |
ab38c13f DG |
3547 | goto valid; |
3548 | } | |
3549 | ||
3550 | ret = stat(path, &buf); | |
3551 | if (ret < 0) { | |
3552 | if (errno != ENOENT) { | |
3553 | PERROR("stat"); | |
3554 | } | |
ab38c13f DG |
3555 | goto valid; |
3556 | } | |
3557 | ||
3558 | if (buf.st_uid != uid) { | |
3559 | goto invalid; | |
3560 | } | |
3561 | ||
3562 | valid: | |
ab38c13f | 3563 | return 1; |
cf53c06d DG |
3564 | invalid: |
3565 | return 0; | |
ab38c13f DG |
3566 | } |
3567 | ||
dcf266c0 JG |
3568 | LTTNG_HIDDEN |
3569 | int config_load_session(const char *path, const char *session_name, | |
1b08cbce JR |
3570 | int overwrite, unsigned int autoload, |
3571 | const struct config_load_session_override_attr *overrides) | |
dcf266c0 JG |
3572 | { |
3573 | int ret; | |
6c66fa0f | 3574 | bool session_loaded = false; |
cf53c06d | 3575 | const char *path_ptr = NULL; |
dcf266c0 JG |
3576 | struct session_config_validation_ctx validation_ctx = { 0 }; |
3577 | ||
3578 | ret = init_session_config_validation_ctx(&validation_ctx); | |
3579 | if (ret) { | |
3580 | goto end; | |
3581 | } | |
3582 | ||
3583 | if (!path) { | |
ab38c13f DG |
3584 | char *home_path; |
3585 | const char *sys_path; | |
3586 | ||
dcf266c0 | 3587 | /* Try home path */ |
ab38c13f | 3588 | home_path = utils_get_home_dir(); |
dcf266c0 | 3589 | if (home_path) { |
ab38c13f | 3590 | char path[PATH_MAX]; |
dcf266c0 | 3591 | |
d4fcf703 DG |
3592 | /* |
3593 | * Try user session configuration path. Ignore error here so we can | |
3594 | * continue loading the system wide sessions. | |
3595 | */ | |
ab38c13f DG |
3596 | if (autoload) { |
3597 | ret = snprintf(path, sizeof(path), | |
3598 | DEFAULT_SESSION_HOME_CONFIGPATH "/" | |
3599 | DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path); | |
cf53c06d DG |
3600 | if (ret < 0) { |
3601 | PERROR("snprintf session autoload home config path"); | |
3602 | goto end; | |
3603 | } | |
3604 | ||
3605 | /* | |
3606 | * Credentials are only validated for the autoload in order to | |
3607 | * avoid any user session daemon to try to load kernel sessions | |
3608 | * automatically and failing all the times. | |
3609 | */ | |
3610 | ret = validate_path_creds(path); | |
3611 | if (ret) { | |
3612 | path_ptr = path; | |
3613 | } | |
ab38c13f DG |
3614 | } else { |
3615 | ret = snprintf(path, sizeof(path), | |
3616 | DEFAULT_SESSION_HOME_CONFIGPATH, home_path); | |
cf53c06d DG |
3617 | if (ret < 0) { |
3618 | PERROR("snprintf session home config path"); | |
3619 | goto end; | |
3620 | } | |
3621 | path_ptr = path; | |
ab38c13f | 3622 | } |
cf53c06d DG |
3623 | if (path_ptr) { |
3624 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3625 | &validation_ctx, overwrite, overrides); |
d4fcf703 DG |
3626 | if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) { |
3627 | goto end; | |
3628 | } | |
3629 | /* | |
3630 | * Continue even if the session was found since we have to try | |
3631 | * the system wide sessions. | |
3632 | */ | |
6c66fa0f | 3633 | session_loaded = true; |
ab38c13f | 3634 | } |
d4fcf703 | 3635 | } |
ab38c13f | 3636 | |
cf53c06d DG |
3637 | /* Reset path pointer for the system wide dir. */ |
3638 | path_ptr = NULL; | |
3639 | ||
d4fcf703 DG |
3640 | /* Try system wide configuration directory. */ |
3641 | if (autoload) { | |
3642 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH "/" | |
3643 | DEFAULT_SESSION_CONFIG_AUTOLOAD; | |
cf53c06d DG |
3644 | ret = validate_path_creds(sys_path); |
3645 | if (ret) { | |
3646 | path_ptr = sys_path; | |
3647 | } | |
d4fcf703 | 3648 | } else { |
cf53c06d DG |
3649 | sys_path = DEFAULT_SESSION_SYSTEM_CONFIGPATH; |
3650 | path_ptr = sys_path; | |
d4fcf703 DG |
3651 | } |
3652 | ||
cf53c06d DG |
3653 | if (path_ptr) { |
3654 | ret = load_session_from_path(path_ptr, session_name, | |
1b08cbce | 3655 | &validation_ctx, overwrite, overrides); |
6c66fa0f JG |
3656 | if (!ret) { |
3657 | session_loaded = true; | |
3658 | } | |
dcf266c0 JG |
3659 | } |
3660 | } else { | |
3661 | ret = access(path, F_OK); | |
3662 | if (ret < 0) { | |
3663 | PERROR("access"); | |
3664 | switch (errno) { | |
3665 | case ENOENT: | |
3666 | ret = -LTTNG_ERR_INVALID; | |
3667 | WARN("Session configuration path does not exist."); | |
3668 | break; | |
3669 | case EACCES: | |
3670 | ret = -LTTNG_ERR_EPERM; | |
3671 | break; | |
3672 | default: | |
3673 | ret = -LTTNG_ERR_UNK; | |
3674 | break; | |
3675 | } | |
3676 | goto end; | |
3677 | } | |
3678 | ||
3679 | ret = load_session_from_path(path, session_name, | |
1b08cbce | 3680 | &validation_ctx, overwrite, overrides); |
dcf266c0 JG |
3681 | } |
3682 | end: | |
3683 | fini_session_config_validation_ctx(&validation_ctx); | |
d2b6efff JG |
3684 | if (ret == -LTTNG_ERR_LOAD_SESSION_NOENT && !session_name && !path) { |
3685 | /* | |
3686 | * Don't report an error if no sessions are found when called | |
3687 | * without a session_name or a search path. | |
3688 | */ | |
3689 | ret = 0; | |
3690 | } | |
6c66fa0f JG |
3691 | |
3692 | if (session_loaded && ret == -LTTNG_ERR_LOAD_SESSION_NOENT) { | |
3693 | /* A matching session was found in one of the search paths. */ | |
3694 | ret = 0; | |
3695 | } | |
dcf266c0 JG |
3696 | return ret; |
3697 | } | |
56766c75 JG |
3698 | |
3699 | static | |
3700 | void __attribute__((destructor)) session_config_exit(void) | |
3701 | { | |
3702 | xmlCleanupParser(); | |
3703 | } |