2 * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
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.
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
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.
27 #include <sys/types.h>
30 #include <common/defaults.h>
31 #include <common/error.h>
32 #include <common/macros.h>
33 #include <common/utils.h>
34 #include <common/compat/getenv.h>
35 #include <lttng/lttng-error.h>
36 #include <libxml/parser.h>
37 #include <libxml/valid.h>
38 #include <libxml/xmlschemas.h>
39 #include <libxml/tree.h>
40 #include <lttng/lttng.h>
41 #include <lttng/snapshot.h>
43 #include "session-config.h"
44 #include "config-internal.h"
46 struct handler_filter_args
{
48 config_entry_handler_cb handler
;
52 struct session_config_validation_ctx
{
53 xmlSchemaParserCtxtPtr parser_ctx
;
55 xmlSchemaValidCtxtPtr schema_validation_ctx
;
58 const char * const config_str_yes
= "yes";
59 const char * const config_str_true
= "true";
60 const char * const config_str_on
= "on";
61 const char * const config_str_no
= "no";
62 const char * const config_str_false
= "false";
63 const char * const config_str_off
= "off";
64 const char * const config_xml_encoding
= "UTF-8";
65 const size_t config_xml_encoding_bytes_per_char
= 2; /* Size of the encoding's largest character */
66 const char * const config_xml_indent_string
= "\t";
67 const char * const config_xml_true
= "true";
68 const char * const config_xml_false
= "false";
70 const char * const config_element_channel
= "channel";
71 const char * const config_element_channels
= "channels";
72 const char * const config_element_domain
= "domain";
73 const char * const config_element_domains
= "domains";
74 const char * const config_element_event
= "event";
75 const char * const config_element_events
= "events";
76 const char * const config_element_context
= "context";
77 const char * const config_element_contexts
= "contexts";
78 const char * const config_element_attributes
= "attributes";
79 const char * const config_element_exclusion
= "exclusion";
80 const char * const config_element_exclusions
= "exclusions";
81 const char * const config_element_function_attributes
= "function_attributes";
82 const char * const config_element_probe_attributes
= "probe_attributes";
83 const char * const config_element_symbol_name
= "symbol_name";
84 const char * const config_element_address
= "address";
85 const char * const config_element_offset
= "offset";
86 const char * const config_element_name
= "name";
87 const char * const config_element_enabled
= "enabled";
88 const char * const config_element_overwrite_mode
= "overwrite_mode";
89 const char * const config_element_subbuf_size
= "subbuffer_size";
90 const char * const config_element_num_subbuf
= "subbuffer_count";
91 const char * const config_element_switch_timer_interval
= "switch_timer_interval";
92 const char * const config_element_read_timer_interval
= "read_timer_interval";
93 const char * const config_element_output
= "output";
94 const char * const config_element_output_type
= "output_type";
95 const char * const config_element_tracefile_size
= "tracefile_size";
96 const char * const config_element_tracefile_count
= "tracefile_count";
97 const char * const config_element_live_timer_interval
= "live_timer_interval";
98 const char * const config_element_discarded_events
= "discarded_events";
99 const char * const config_element_lost_packets
= "lost_packets";
100 const char * const config_element_type
= "type";
101 const char * const config_element_buffer_type
= "buffer_type";
102 const char * const config_element_session
= "session";
103 const char * const config_element_sessions
= "sessions";
104 const char * const config_element_context_perf
= "perf";
105 const char * const config_element_context_app
= "app";
106 const char * const config_element_context_app_provider_name
= "provider_name";
107 const char * const config_element_context_app_ctx_name
= "ctx_name";
108 const char * const config_element_config
= "config";
109 const char * const config_element_started
= "started";
110 const char * const config_element_snapshot_mode
= "snapshot_mode";
111 const char * const config_element_loglevel
= "loglevel";
112 const char * const config_element_loglevel_type
= "loglevel_type";
113 const char * const config_element_filter
= "filter";
114 const char * const config_element_filter_expression
= "filter_expression";
115 const char * const config_element_snapshot_outputs
= "snapshot_outputs";
116 const char * const config_element_consumer_output
= "consumer_output";
117 const char * const config_element_destination
= "destination";
118 const char * const config_element_path
= "path";
119 const char * const config_element_net_output
= "net_output";
120 const char * const config_element_control_uri
= "control_uri";
121 const char * const config_element_data_uri
= "data_uri";
122 const char * const config_element_max_size
= "max_size";
123 const char * const config_element_pid
= "pid";
124 const char * const config_element_pids
= "pids";
125 const char * const config_element_shared_memory_path
= "shared_memory_path";
126 const char * const config_element_pid_tracker
= "pid_tracker";
127 const char * const config_element_trackers
= "trackers";
128 const char * const config_element_targets
= "targets";
129 const char * const config_element_target_pid
= "pid_target";
131 const char * const config_domain_type_kernel
= "KERNEL";
132 const char * const config_domain_type_ust
= "UST";
133 const char * const config_domain_type_jul
= "JUL";
134 const char * const config_domain_type_log4j
= "LOG4J";
135 const char * const config_domain_type_python
= "PYTHON";
137 const char * const config_buffer_type_per_pid
= "PER_PID";
138 const char * const config_buffer_type_per_uid
= "PER_UID";
139 const char * const config_buffer_type_global
= "GLOBAL";
141 const char * const config_overwrite_mode_discard
= "DISCARD";
142 const char * const config_overwrite_mode_overwrite
= "OVERWRITE";
144 const char * const config_output_type_splice
= "SPLICE";
145 const char * const config_output_type_mmap
= "MMAP";
147 const char * const config_loglevel_type_all
= "ALL";
148 const char * const config_loglevel_type_range
= "RANGE";
149 const char * const config_loglevel_type_single
= "SINGLE";
151 const char * const config_event_type_all
= "ALL";
152 const char * const config_event_type_tracepoint
= "TRACEPOINT";
153 const char * const config_event_type_probe
= "PROBE";
154 const char * const config_event_type_function
= "FUNCTION";
155 const char * const config_event_type_function_entry
= "FUNCTION_ENTRY";
156 const char * const config_event_type_noop
= "NOOP";
157 const char * const config_event_type_syscall
= "SYSCALL";
158 const char * const config_event_type_kprobe
= "KPROBE";
159 const char * const config_event_type_kretprobe
= "KRETPROBE";
161 const char * const config_event_context_pid
= "PID";
162 const char * const config_event_context_procname
= "PROCNAME";
163 const char * const config_event_context_prio
= "PRIO";
164 const char * const config_event_context_nice
= "NICE";
165 const char * const config_event_context_vpid
= "VPID";
166 const char * const config_event_context_tid
= "TID";
167 const char * const config_event_context_vtid
= "VTID";
168 const char * const config_event_context_ppid
= "PPID";
169 const char * const config_event_context_vppid
= "VPPID";
170 const char * const config_event_context_pthread_id
= "PTHREAD_ID";
171 const char * const config_event_context_hostname
= "HOSTNAME";
172 const char * const config_event_context_ip
= "IP";
173 const char * const config_event_context_perf_thread_counter
= "PERF_THREAD_COUNTER";
174 const char * const config_event_context_app
= "APP";
177 struct consumer_output
{
184 static int config_entry_handler_filter(struct handler_filter_args
*args
,
185 const char *section
, const char *name
, const char *value
)
188 struct config_entry entry
= { section
, name
, value
};
192 if (!section
|| !name
|| !value
) {
198 if (strcmp(args
->section
, section
)) {
203 ret
= args
->handler(&entry
, args
->user_data
);
209 int config_get_section_entries(const char *override_path
, const char *section
,
210 config_entry_handler_cb handler
, void *user_data
)
214 FILE *config_file
= NULL
;
215 struct handler_filter_args filter
= { section
, handler
, user_data
};
217 /* First, try system-wide conf. file. */
218 path
= DEFAULT_DAEMON_SYSTEM_CONFIGPATH
;
220 config_file
= fopen(path
, "r");
222 DBG("Loading daemon conf file at %s", path
);
224 * Return value is not very important here since error or not, we
225 * continue and try the next possible conf. file.
227 (void) ini_parse_file(config_file
,
228 (ini_entry_handler
) config_entry_handler_filter
,
233 /* Second is the user local configuration. */
234 path
= utils_get_home_dir();
236 char fullpath
[PATH_MAX
];
238 ret
= snprintf(fullpath
, sizeof(fullpath
),
239 DEFAULT_DAEMON_HOME_CONFIGPATH
, path
);
241 PERROR("snprintf user conf. path");
245 config_file
= fopen(fullpath
, "r");
247 DBG("Loading daemon user conf file at %s", path
);
249 * Return value is not very important here since error or not, we
250 * continue and try the next possible conf. file.
252 (void) ini_parse_file(config_file
,
253 (ini_entry_handler
) config_entry_handler_filter
,
259 /* Final path is the one that the user might have provided. */
261 config_file
= fopen(override_path
, "r");
263 DBG("Loading daemon command line conf file at %s", override_path
);
264 (void) ini_parse_file(config_file
,
265 (ini_entry_handler
) config_entry_handler_filter
,
269 ERR("Failed to open daemon configuration file at %s",
276 /* Everything went well. */
284 int config_parse_value(const char *value
)
287 char *endptr
, *lower_str
;
297 v
= strtoul(value
, &endptr
, 10);
298 if (endptr
!= value
) {
303 lower_str
= zmalloc(len
+ 1);
310 for (i
= 0; i
< len
; i
++) {
311 lower_str
[i
] = tolower(value
[i
]);
314 if (!strcmp(lower_str
, config_str_yes
) ||
315 !strcmp(lower_str
, config_str_true
) ||
316 !strcmp(lower_str
, config_str_on
)) {
318 } else if (!strcmp(lower_str
, config_str_no
) ||
319 !strcmp(lower_str
, config_str_false
) ||
320 !strcmp(lower_str
, config_str_off
)) {
332 * Returns a xmlChar string which must be released using xmlFree().
334 static xmlChar
*encode_string(const char *in_str
)
336 xmlChar
*out_str
= NULL
;
337 xmlCharEncodingHandlerPtr handler
;
338 int out_len
, ret
, in_len
;
342 handler
= xmlFindCharEncodingHandler(config_xml_encoding
);
344 ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!");
348 in_len
= strlen(in_str
);
350 * Add 1 byte for the NULL terminted character. The factor 4 here is
351 * used because UTF-8 characters can take up to 4 bytes.
353 out_len
= (in_len
* 4) + 1;
354 out_str
= xmlMalloc(out_len
);
359 ret
= handler
->input(out_str
, &out_len
, (const xmlChar
*) in_str
, &in_len
);
366 /* out_len is now the size of out_str */
367 out_str
[out_len
] = '\0';
373 struct config_writer
*config_writer_create(int fd_output
, int indent
)
376 struct config_writer
*writer
;
377 xmlOutputBufferPtr buffer
;
379 writer
= zmalloc(sizeof(struct config_writer
));
381 PERROR("zmalloc config_writer_create");
385 buffer
= xmlOutputBufferCreateFd(fd_output
, NULL
);
390 writer
->writer
= xmlNewTextWriter(buffer
);
391 ret
= xmlTextWriterStartDocument(writer
->writer
, NULL
,
392 config_xml_encoding
, NULL
);
397 ret
= xmlTextWriterSetIndentString(writer
->writer
,
398 BAD_CAST config_xml_indent_string
);
403 ret
= xmlTextWriterSetIndent(writer
->writer
, indent
);
411 config_writer_destroy(writer
);
416 int config_writer_destroy(struct config_writer
*writer
)
425 if (xmlTextWriterEndDocument(writer
->writer
) < 0) {
426 WARN("Could not close XML document");
430 if (writer
->writer
) {
431 xmlFreeTextWriter(writer
->writer
);
440 int config_writer_open_element(struct config_writer
*writer
,
441 const char *element_name
)
444 xmlChar
*encoded_element_name
;
446 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
451 encoded_element_name
= encode_string(element_name
);
452 if (!encoded_element_name
) {
457 ret
= xmlTextWriterStartElement(writer
->writer
, encoded_element_name
);
458 xmlFree(encoded_element_name
);
460 return ret
>= 0 ? 0 : ret
;
464 int config_writer_write_attribute(struct config_writer
*writer
,
465 const char *name
, const char *value
)
468 xmlChar
*encoded_name
= NULL
;
469 xmlChar
*encoded_value
= NULL
;
471 if (!writer
|| !writer
->writer
|| !name
|| !name
[0]) {
476 encoded_name
= encode_string(name
);
482 encoded_value
= encode_string(value
);
483 if (!encoded_value
) {
488 ret
= xmlTextWriterWriteAttribute(writer
->writer
, encoded_name
,
491 xmlFree(encoded_name
);
492 xmlFree(encoded_value
);
493 return ret
>= 0 ? 0 : ret
;
497 int config_writer_close_element(struct config_writer
*writer
)
501 if (!writer
|| !writer
->writer
) {
506 ret
= xmlTextWriterEndElement(writer
->writer
);
508 return ret
>= 0 ? 0 : ret
;
512 int config_writer_write_element_unsigned_int(struct config_writer
*writer
,
513 const char *element_name
, uint64_t value
)
516 xmlChar
*encoded_element_name
;
518 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
523 encoded_element_name
= encode_string(element_name
);
524 if (!encoded_element_name
) {
529 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
530 encoded_element_name
, "%" PRIu64
, value
);
531 xmlFree(encoded_element_name
);
533 return ret
>= 0 ? 0 : ret
;
537 int config_writer_write_element_signed_int(struct config_writer
*writer
,
538 const char *element_name
, int64_t value
)
541 xmlChar
*encoded_element_name
;
543 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
548 encoded_element_name
= encode_string(element_name
);
549 if (!encoded_element_name
) {
554 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
555 encoded_element_name
, "%" PRIi64
, value
);
556 xmlFree(encoded_element_name
);
558 return ret
>= 0 ? 0 : ret
;
562 int config_writer_write_element_bool(struct config_writer
*writer
,
563 const char *element_name
, int value
)
565 return config_writer_write_element_string(writer
, element_name
,
566 value
? config_xml_true
: config_xml_false
);
570 int config_writer_write_element_string(struct config_writer
*writer
,
571 const char *element_name
, const char *value
)
574 xmlChar
*encoded_element_name
= NULL
;
575 xmlChar
*encoded_value
= NULL
;
577 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0] ||
583 encoded_element_name
= encode_string(element_name
);
584 if (!encoded_element_name
) {
589 encoded_value
= encode_string(value
);
590 if (!encoded_value
) {
595 ret
= xmlTextWriterWriteElement(writer
->writer
, encoded_element_name
,
598 xmlFree(encoded_element_name
);
599 xmlFree(encoded_value
);
600 return ret
>= 0 ? 0 : ret
;
604 void xml_error_handler(void *ctx
, const char *format
, ...)
610 va_start(args
, format
);
611 ret
= vasprintf(&errMsg
, format
, args
);
614 ERR("String allocation failed in xml error handler");
618 fprintf(stderr
, "XML Error: %s", errMsg
);
623 void fini_session_config_validation_ctx(
624 struct session_config_validation_ctx
*ctx
)
626 if (ctx
->parser_ctx
) {
627 xmlSchemaFreeParserCtxt(ctx
->parser_ctx
);
631 xmlSchemaFree(ctx
->schema
);
634 if (ctx
->schema_validation_ctx
) {
635 xmlSchemaFreeValidCtxt(ctx
->schema_validation_ctx
);
638 memset(ctx
, 0, sizeof(struct session_config_validation_ctx
));
642 char *get_session_config_xsd_path()
645 const char *base_path
= lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV
);
646 size_t base_path_len
;
650 base_path
= DEFAULT_SESSION_CONFIG_XSD_PATH
;
653 base_path_len
= strlen(base_path
);
654 max_path_len
= base_path_len
+
655 sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME
) + 1;
656 xsd_path
= zmalloc(max_path_len
);
661 strncpy(xsd_path
, base_path
, max_path_len
);
662 if (xsd_path
[base_path_len
- 1] != '/') {
663 xsd_path
[base_path_len
++] = '/';
666 strncpy(xsd_path
+ base_path_len
, DEFAULT_SESSION_CONFIG_XSD_FILENAME
,
667 max_path_len
- base_path_len
);
673 int init_session_config_validation_ctx(
674 struct session_config_validation_ctx
*ctx
)
677 char *xsd_path
= get_session_config_xsd_path();
680 ret
= -LTTNG_ERR_NOMEM
;
684 ctx
->parser_ctx
= xmlSchemaNewParserCtxt(xsd_path
);
685 if (!ctx
->parser_ctx
) {
686 ERR("XSD parser context creation failed");
687 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
690 xmlSchemaSetParserErrors(ctx
->parser_ctx
, xml_error_handler
,
691 xml_error_handler
, NULL
);
693 ctx
->schema
= xmlSchemaParse(ctx
->parser_ctx
);
695 ERR("XSD parsing failed");
696 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
700 ctx
->schema_validation_ctx
= xmlSchemaNewValidCtxt(ctx
->schema
);
701 if (!ctx
->schema_validation_ctx
) {
702 ERR("XSD validation context creation failed");
703 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
707 xmlSchemaSetValidErrors(ctx
->schema_validation_ctx
, xml_error_handler
,
708 xml_error_handler
, NULL
);
713 fini_session_config_validation_ctx(ctx
);
721 int parse_uint(xmlChar
*str
, uint64_t *val
)
731 *val
= strtoull((const char *) str
, &endptr
, 10);
732 if (!endptr
|| *endptr
) {
743 int parse_int(xmlChar
*str
, int64_t *val
)
753 *val
= strtoll((const char *) str
, &endptr
, 10);
754 if (!endptr
|| *endptr
) {
765 int parse_bool(xmlChar
*str
, int *val
)
774 if (!strcmp((const char *) str
, config_xml_true
)) {
776 } else if (!strcmp((const char *) str
, config_xml_false
)) {
779 WARN("Invalid boolean value encoutered (%s).",
788 int get_domain_type(xmlChar
*domain
)
796 if (!strcmp((char *) domain
, config_domain_type_kernel
)) {
797 ret
= LTTNG_DOMAIN_KERNEL
;
798 } else if (!strcmp((char *) domain
, config_domain_type_ust
)) {
799 ret
= LTTNG_DOMAIN_UST
;
800 } else if (!strcmp((char *) domain
, config_domain_type_jul
)) {
801 ret
= LTTNG_DOMAIN_JUL
;
802 } else if (!strcmp((char *) domain
, config_domain_type_log4j
)) {
803 ret
= LTTNG_DOMAIN_LOG4J
;
804 } else if (!strcmp((char *) domain
, config_domain_type_python
)) {
805 ret
= LTTNG_DOMAIN_PYTHON
;
816 int get_buffer_type(xmlChar
*buffer_type
)
824 if (!strcmp((char *) buffer_type
, config_buffer_type_global
)) {
825 ret
= LTTNG_BUFFER_GLOBAL
;
826 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_uid
)) {
827 ret
= LTTNG_BUFFER_PER_UID
;
828 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_pid
)) {
829 ret
= LTTNG_BUFFER_PER_PID
;
840 int get_overwrite_mode(xmlChar
*overwrite_mode
)
844 if (!overwrite_mode
) {
848 if (!strcmp((char *) overwrite_mode
, config_overwrite_mode_overwrite
)) {
850 } else if (!strcmp((char *) overwrite_mode
,
851 config_overwrite_mode_discard
)) {
863 int get_output_type(xmlChar
*output_type
)
871 if (!strcmp((char *) output_type
, config_output_type_mmap
)) {
872 ret
= LTTNG_EVENT_MMAP
;
873 } else if (!strcmp((char *) output_type
, config_output_type_splice
)) {
874 ret
= LTTNG_EVENT_SPLICE
;
885 int get_event_type(xmlChar
*event_type
)
893 if (!strcmp((char *) event_type
, config_event_type_all
)) {
894 ret
= LTTNG_EVENT_ALL
;
895 } else if (!strcmp((char *) event_type
, config_event_type_tracepoint
)) {
896 ret
= LTTNG_EVENT_TRACEPOINT
;
897 } else if (!strcmp((char *) event_type
, config_event_type_probe
)) {
898 ret
= LTTNG_EVENT_PROBE
;
899 } else if (!strcmp((char *) event_type
, config_event_type_function
)) {
900 ret
= LTTNG_EVENT_FUNCTION
;
901 } else if (!strcmp((char *) event_type
,
902 config_event_type_function_entry
)) {
903 ret
= LTTNG_EVENT_FUNCTION_ENTRY
;
904 } else if (!strcmp((char *) event_type
, config_event_type_noop
)) {
905 ret
= LTTNG_EVENT_NOOP
;
906 } else if (!strcmp((char *) event_type
, config_event_type_syscall
)) {
907 ret
= LTTNG_EVENT_SYSCALL
;
918 int get_loglevel_type(xmlChar
*loglevel_type
)
922 if (!loglevel_type
) {
926 if (!strcmp((char *) loglevel_type
, config_loglevel_type_all
)) {
927 ret
= LTTNG_EVENT_LOGLEVEL_ALL
;
928 } else if (!strcmp((char *) loglevel_type
,
929 config_loglevel_type_range
)) {
930 ret
= LTTNG_EVENT_LOGLEVEL_RANGE
;
931 } else if (!strcmp((char *) loglevel_type
,
932 config_loglevel_type_single
)) {
933 ret
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
944 * Return the context type or -1 on error.
947 int get_context_type(xmlChar
*context_type
)
955 if (!strcmp((char *) context_type
, config_event_context_pid
)) {
956 ret
= LTTNG_EVENT_CONTEXT_PID
;
957 } else if (!strcmp((char *) context_type
,
958 config_event_context_procname
)) {
959 ret
= LTTNG_EVENT_CONTEXT_PROCNAME
;
960 } else if (!strcmp((char *) context_type
,
961 config_event_context_prio
)) {
962 ret
= LTTNG_EVENT_CONTEXT_PRIO
;
963 } else if (!strcmp((char *) context_type
,
964 config_event_context_nice
)) {
965 ret
= LTTNG_EVENT_CONTEXT_NICE
;
966 } else if (!strcmp((char *) context_type
,
967 config_event_context_vpid
)) {
968 ret
= LTTNG_EVENT_CONTEXT_VPID
;
969 } else if (!strcmp((char *) context_type
,
970 config_event_context_tid
)) {
971 ret
= LTTNG_EVENT_CONTEXT_TID
;
972 } else if (!strcmp((char *) context_type
,
973 config_event_context_vtid
)) {
974 ret
= LTTNG_EVENT_CONTEXT_VTID
;
975 } else if (!strcmp((char *) context_type
,
976 config_event_context_ppid
)) {
977 ret
= LTTNG_EVENT_CONTEXT_PPID
;
978 } else if (!strcmp((char *) context_type
,
979 config_event_context_vppid
)) {
980 ret
= LTTNG_EVENT_CONTEXT_VPPID
;
981 } else if (!strcmp((char *) context_type
,
982 config_event_context_pthread_id
)) {
983 ret
= LTTNG_EVENT_CONTEXT_PTHREAD_ID
;
984 } else if (!strcmp((char *) context_type
,
985 config_event_context_hostname
)) {
986 ret
= LTTNG_EVENT_CONTEXT_HOSTNAME
;
987 } else if (!strcmp((char *) context_type
,
988 config_event_context_ip
)) {
989 ret
= LTTNG_EVENT_CONTEXT_IP
;
1000 int init_domain(xmlNodePtr domain_node
, struct lttng_domain
*domain
)
1005 for (node
= xmlFirstElementChild(domain_node
); node
;
1006 node
= xmlNextElementSibling(node
)) {
1007 if (!strcmp((const char *) node
->name
, config_element_type
)) {
1009 xmlChar
*node_content
= xmlNodeGetContent(node
);
1010 if (!node_content
) {
1011 ret
= -LTTNG_ERR_NOMEM
;
1015 ret
= get_domain_type(node_content
);
1018 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1023 } else if (!strcmp((const char *) node
->name
,
1024 config_element_buffer_type
)) {
1026 xmlChar
*node_content
= xmlNodeGetContent(node
);
1027 if (!node_content
) {
1028 ret
= -LTTNG_ERR_NOMEM
;
1032 ret
= get_buffer_type(node_content
);
1035 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1039 domain
->buf_type
= ret
;
1048 int get_net_output_uris(xmlNodePtr net_output_node
, char **control_uri
,
1053 for (node
= xmlFirstElementChild(net_output_node
); node
;
1054 node
= xmlNextElementSibling(node
)) {
1055 if (!strcmp((const char *) node
->name
, config_element_control_uri
)) {
1057 *control_uri
= (char *) xmlNodeGetContent(node
);
1058 if (!*control_uri
) {
1063 *data_uri
= (char *) xmlNodeGetContent(node
);
1070 return *control_uri
|| *data_uri
? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1074 int process_consumer_output(xmlNodePtr consumer_output_node
,
1075 struct consumer_output
*output
)
1082 for (node
= xmlFirstElementChild(consumer_output_node
); node
;
1083 node
= xmlNextElementSibling(node
)) {
1084 if (!strcmp((const char *) node
->name
, config_element_enabled
)) {
1085 xmlChar
*enabled_str
= xmlNodeGetContent(node
);
1089 ret
= -LTTNG_ERR_NOMEM
;
1093 ret
= parse_bool(enabled_str
, &output
->enabled
);
1099 xmlNodePtr output_type_node
;
1102 output_type_node
= xmlFirstElementChild(node
);
1103 if (!output_type_node
) {
1104 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1108 if (!strcmp((const char *) output_type_node
->name
,
1109 config_element_path
)) {
1111 output
->path
= (char *) xmlNodeGetContent(output_type_node
);
1112 if (!output
->path
) {
1113 ret
= -LTTNG_ERR_NOMEM
;
1118 ret
= get_net_output_uris(output_type_node
,
1119 &output
->control_uri
, &output
->data_uri
);
1131 free(output
->control_uri
);
1132 free(output
->data_uri
);
1133 memset(output
, 0, sizeof(struct consumer_output
));
1139 int create_session_net_output(const char *name
, struct lttng_domain
*domain
,
1140 const char *control_uri
, const char *data_uri
)
1143 struct lttng_handle
*handle
;
1144 const char *uri
= NULL
;
1149 handle
= lttng_create_handle(name
, domain
);
1151 ret
= -LTTNG_ERR_NOMEM
;
1155 if (!control_uri
|| !data_uri
) {
1156 uri
= control_uri
? control_uri
: data_uri
;
1161 ret
= lttng_set_consumer_url(handle
, control_uri
, data_uri
);
1162 lttng_destroy_handle(handle
);
1168 int create_snapshot_session(const char *session_name
, xmlNodePtr output_node
)
1171 xmlNodePtr node
= NULL
;
1172 xmlNodePtr snapshot_output_list_node
;
1173 xmlNodePtr snapshot_output_node
;
1175 assert(session_name
);
1177 ret
= lttng_create_session_snapshot(session_name
, NULL
);
1186 snapshot_output_list_node
= xmlFirstElementChild(output_node
);
1188 /* Parse and create snapshot outputs */
1190 for (snapshot_output_node
=
1191 xmlFirstElementChild(snapshot_output_list_node
);
1192 snapshot_output_node
; snapshot_output_node
=
1193 xmlNextElementSibling(snapshot_output_node
)) {
1195 uint64_t max_size
= UINT64_MAX
;
1196 struct consumer_output output
= { 0 };
1197 struct lttng_snapshot_output
*snapshot_output
= NULL
;
1199 for (node
= xmlFirstElementChild(snapshot_output_node
); node
;
1200 node
= xmlNextElementSibling(node
)) {
1201 if (!strcmp((const char *) node
->name
,
1202 config_element_name
)) {
1204 name
= (char *) xmlNodeGetContent(node
);
1206 ret
= -LTTNG_ERR_NOMEM
;
1207 goto error_snapshot_output
;
1209 } else if (!strcmp((const char *) node
->name
,
1210 config_element_max_size
)) {
1211 xmlChar
*content
= xmlNodeGetContent(node
);
1215 ret
= -LTTNG_ERR_NOMEM
;
1216 goto error_snapshot_output
;
1218 ret
= parse_uint(content
, &max_size
);
1221 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1222 goto error_snapshot_output
;
1225 /* consumer_output */
1226 ret
= process_consumer_output(node
, &output
);
1228 goto error_snapshot_output
;
1233 snapshot_output
= lttng_snapshot_output_create();
1234 if (!snapshot_output
) {
1235 ret
= -LTTNG_ERR_NOMEM
;
1236 goto error_snapshot_output
;
1239 ret
= lttng_snapshot_output_set_name(name
, snapshot_output
);
1241 goto error_snapshot_output
;
1244 ret
= lttng_snapshot_output_set_size(max_size
, snapshot_output
);
1246 goto error_snapshot_output
;
1250 ret
= lttng_snapshot_output_set_ctrl_url(output
.path
,
1253 goto error_snapshot_output
;
1256 if (output
.control_uri
) {
1257 ret
= lttng_snapshot_output_set_ctrl_url(output
.control_uri
,
1260 goto error_snapshot_output
;
1264 if (output
.data_uri
) {
1265 ret
= lttng_snapshot_output_set_data_url(output
.data_uri
,
1268 goto error_snapshot_output
;
1273 ret
= lttng_snapshot_add_output(session_name
, snapshot_output
);
1274 error_snapshot_output
:
1277 free(output
.control_uri
);
1278 free(output
.data_uri
);
1279 lttng_snapshot_output_destroy(snapshot_output
);
1289 int create_session(const char *name
,
1290 struct lttng_domain
*kernel_domain
,
1291 struct lttng_domain
*ust_domain
,
1292 struct lttng_domain
*jul_domain
,
1293 struct lttng_domain
*log4j_domain
,
1294 xmlNodePtr output_node
,
1295 uint64_t live_timer_interval
)
1298 struct consumer_output output
= { 0 };
1299 xmlNodePtr consumer_output_node
;
1304 consumer_output_node
= xmlFirstElementChild(output_node
);
1305 if (!consumer_output_node
) {
1306 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1310 if (strcmp((const char *) consumer_output_node
->name
,
1311 config_element_consumer_output
)) {
1312 WARN("Invalid output type, expected %s node",
1313 config_element_consumer_output
);
1314 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1318 ret
= process_consumer_output(consumer_output_node
, &output
);
1324 if (live_timer_interval
!= UINT64_MAX
&&
1325 !output
.control_uri
&& !output
.data_uri
) {
1326 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1330 if (output
.control_uri
|| output
.data_uri
) {
1332 struct lttng_domain
*domain
;
1333 struct lttng_domain
*domains
[] =
1334 { kernel_domain
, ust_domain
, jul_domain
, log4j_domain
};
1336 /* network destination */
1337 if (live_timer_interval
&& live_timer_interval
!= UINT64_MAX
) {
1339 * URLs are provided for sure since the test above make sure that
1340 * with a live timer the data and control URIs are provided. So,
1341 * NULL is passed here and will be set right after.
1343 ret
= lttng_create_session_live(name
, NULL
, live_timer_interval
);
1345 ret
= lttng_create_session(name
, NULL
);
1351 for (i
= 0; i
< (sizeof(domains
) / sizeof(domains
[0])); i
++) {
1352 domain
= domains
[i
];
1357 ret
= create_session_net_output(name
, domain
, output
.control_uri
,
1364 /* either local output or no output */
1365 ret
= lttng_create_session(name
, output
.path
);
1372 free(output
.control_uri
);
1373 free(output
.data_uri
);
1377 int process_probe_attribute_node(xmlNodePtr probe_attribute_node
,
1378 struct lttng_event_probe_attr
*attr
)
1382 assert(probe_attribute_node
);
1385 if (!strcmp((const char *) probe_attribute_node
->name
,
1386 config_element_address
)) {
1391 content
= xmlNodeGetContent(probe_attribute_node
);
1393 ret
= -LTTNG_ERR_NOMEM
;
1397 ret
= parse_uint(content
, &addr
);
1400 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1405 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1406 config_element_offset
)) {
1408 uint64_t offset
= 0;
1411 content
= xmlNodeGetContent(probe_attribute_node
);
1413 ret
= -LTTNG_ERR_NOMEM
;
1417 ret
= parse_uint(content
, &offset
);
1420 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1424 attr
->offset
= offset
;
1425 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1426 config_element_symbol_name
)) {
1431 content
= xmlNodeGetContent(probe_attribute_node
);
1433 ret
= -LTTNG_ERR_NOMEM
;
1437 name_len
= strlen((char *) content
);
1438 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1439 WARN("symbol_name too long.");
1440 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1445 strncpy(attr
->symbol_name
, (const char *) content
, name_len
);
1454 int process_event_node(xmlNodePtr event_node
, struct lttng_handle
*handle
,
1455 const char *channel_name
)
1459 struct lttng_event event
;
1460 char **exclusions
= NULL
;
1461 unsigned long exclusion_count
= 0;
1462 char *filter_expression
= NULL
;
1466 assert(channel_name
);
1468 memset(&event
, 0, sizeof(event
));
1470 /* Initialize default log level which varies by domain */
1471 switch (handle
->domain
.type
)
1473 case LTTNG_DOMAIN_JUL
:
1474 event
.loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
1476 case LTTNG_DOMAIN_LOG4J
:
1477 event
.loglevel
= LTTNG_LOGLEVEL_LOG4J_ALL
;
1479 case LTTNG_DOMAIN_PYTHON
:
1480 event
.loglevel
= LTTNG_LOGLEVEL_PYTHON_DEBUG
;
1482 case LTTNG_DOMAIN_UST
:
1483 case LTTNG_DOMAIN_KERNEL
:
1484 event
.loglevel
= LTTNG_LOGLEVEL_DEBUG
;
1490 for (node
= xmlFirstElementChild(event_node
); node
;
1491 node
= xmlNextElementSibling(node
)) {
1492 if (!strcmp((const char *) node
->name
, config_element_name
)) {
1497 content
= xmlNodeGetContent(node
);
1499 ret
= -LTTNG_ERR_NOMEM
;
1503 name_len
= strlen((char *) content
);
1504 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1505 WARN("Channel name too long.");
1506 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1511 strncpy(event
.name
, (const char *) content
, name_len
);
1513 } else if (!strcmp((const char *) node
->name
,
1514 config_element_enabled
)) {
1515 xmlChar
*content
= xmlNodeGetContent(node
);
1519 ret
= -LTTNG_ERR_NOMEM
;
1523 ret
= parse_bool(content
, &event
.enabled
);
1526 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1529 } else if (!strcmp((const char *) node
->name
,
1530 config_element_type
)) {
1531 xmlChar
*content
= xmlNodeGetContent(node
);
1535 ret
= -LTTNG_ERR_NOMEM
;
1539 ret
= get_event_type(content
);
1542 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1547 } else if (!strcmp((const char *) node
->name
,
1548 config_element_loglevel_type
)) {
1549 xmlChar
*content
= xmlNodeGetContent(node
);
1553 ret
= -LTTNG_ERR_NOMEM
;
1557 ret
= get_loglevel_type(content
);
1560 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1564 event
.loglevel_type
= ret
;
1565 } else if (!strcmp((const char *) node
->name
,
1566 config_element_loglevel
)) {
1568 int64_t loglevel
= 0;
1571 content
= xmlNodeGetContent(node
);
1573 ret
= -LTTNG_ERR_NOMEM
;
1577 ret
= parse_int(content
, &loglevel
);
1580 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1584 if (loglevel
> INT_MAX
|| loglevel
< INT_MIN
) {
1585 WARN("loglevel out of range.");
1586 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1590 event
.loglevel
= loglevel
;
1591 } else if (!strcmp((const char *) node
->name
,
1592 config_element_filter
)) {
1594 xmlNodeGetContent(node
);
1598 ret
= -LTTNG_ERR_NOMEM
;
1602 filter_expression
= strdup((char *) content
);
1604 if (!filter_expression
) {
1605 ret
= -LTTNG_ERR_NOMEM
;
1608 } else if (!strcmp((const char *) node
->name
,
1609 config_element_exclusions
)) {
1610 xmlNodePtr exclusion_node
;
1611 int exclusion_index
= 0;
1616 * Exclusions has already been initialized,
1619 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1623 exclusion_count
= xmlChildElementCount(node
);
1624 if (!exclusion_count
) {
1628 exclusions
= zmalloc(exclusion_count
* sizeof(char *));
1630 exclusion_count
= 0;
1631 ret
= -LTTNG_ERR_NOMEM
;
1635 for (exclusion_node
= xmlFirstElementChild(node
); exclusion_node
;
1636 exclusion_node
= xmlNextElementSibling(exclusion_node
)) {
1638 xmlNodeGetContent(exclusion_node
);
1641 ret
= -LTTNG_ERR_NOMEM
;
1645 exclusions
[exclusion_index
] = strdup((const char *) content
);
1647 if (!exclusions
[exclusion_index
]) {
1648 ret
= -LTTNG_ERR_NOMEM
;
1654 event
.exclusion
= 1;
1655 } else if (!strcmp((const char *) node
->name
,
1656 config_element_attributes
)) {
1657 xmlNodePtr attribute_node
= xmlFirstElementChild(node
);
1660 if (!attribute_node
) {
1661 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1665 if (!strcmp((const char *) node
->name
,
1666 config_element_probe_attributes
)) {
1667 xmlNodePtr probe_attribute_node
;
1669 /* probe_attributes */
1670 for (probe_attribute_node
=
1671 xmlFirstElementChild(attribute_node
); probe_attribute_node
;
1672 probe_attribute_node
= xmlNextElementSibling(
1673 probe_attribute_node
)) {
1675 ret
= process_probe_attribute_node(probe_attribute_node
,
1684 xmlNodePtr symbol_node
= xmlFirstElementChild(attribute_node
);
1686 /* function_attributes */
1687 content
= xmlNodeGetContent(symbol_node
);
1689 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1693 sym_len
= strlen((char *) content
);
1694 if (sym_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1695 WARN("Function name too long.");
1696 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1701 strncpy(event
.attr
.ftrace
.symbol_name
, (char *) content
,
1708 ret
= lttng_enable_event_with_exclusions(handle
, &event
, channel_name
,
1709 filter_expression
, exclusion_count
, exclusions
);
1714 if (!event
.enabled
) {
1716 * Note that we should use lttng_disable_event_ext() (2.6+) to
1717 * eliminate the risk of clashing on events of the same
1718 * name (with different event types and loglevels).
1720 * Unfortunately, lttng_disable_event_ext() only performs a
1721 * match on the name and event type and errors out if any other
1722 * event attribute is not set to its default value.
1724 * This will disable all events that match this name.
1726 ret
= lttng_disable_event(handle
, event
.name
, channel_name
);
1729 for (i
= 0; i
< exclusion_count
; i
++) {
1730 free(exclusions
[i
]);
1734 free(filter_expression
);
1739 int process_events_node(xmlNodePtr events_node
, struct lttng_handle
*handle
,
1740 const char *channel_name
)
1745 assert(events_node
);
1747 assert(channel_name
);
1749 for (node
= xmlFirstElementChild(events_node
); node
;
1750 node
= xmlNextElementSibling(node
)) {
1751 ret
= process_event_node(node
, handle
, channel_name
);
1761 int process_channel_attr_node(xmlNodePtr attr_node
,
1762 struct lttng_channel
*channel
, xmlNodePtr
*contexts_node
,
1763 xmlNodePtr
*events_node
)
1769 assert(contexts_node
);
1770 assert(events_node
);
1772 if (!strcmp((const char *) attr_node
->name
, config_element_name
)) {
1777 content
= xmlNodeGetContent(attr_node
);
1779 ret
= -LTTNG_ERR_NOMEM
;
1783 name_len
= strlen((char *) content
);
1784 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1785 WARN("Channel name too long.");
1786 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1791 strncpy(channel
->name
, (const char *) content
, name_len
);
1793 } else if (!strcmp((const char *) attr_node
->name
,
1794 config_element_enabled
)) {
1799 content
= xmlNodeGetContent(attr_node
);
1801 ret
= -LTTNG_ERR_NOMEM
;
1805 ret
= parse_bool(content
, &enabled
);
1808 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1812 channel
->enabled
= enabled
;
1813 } else if (!strcmp((const char *) attr_node
->name
,
1814 config_element_overwrite_mode
)) {
1817 /* overwrite_mode */
1818 content
= xmlNodeGetContent(attr_node
);
1820 ret
= -LTTNG_ERR_NOMEM
;
1824 ret
= get_overwrite_mode(content
);
1827 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1831 channel
->attr
.overwrite
= ret
;
1832 } else if (!strcmp((const char *) attr_node
->name
,
1833 config_element_subbuf_size
)) {
1836 /* subbuffer_size */
1837 content
= xmlNodeGetContent(attr_node
);
1839 ret
= -LTTNG_ERR_NOMEM
;
1843 ret
= parse_uint(content
, &channel
->attr
.subbuf_size
);
1846 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1849 } else if (!strcmp((const char *) attr_node
->name
,
1850 config_element_num_subbuf
)) {
1853 /* subbuffer_count */
1854 content
= xmlNodeGetContent(attr_node
);
1856 ret
= -LTTNG_ERR_NOMEM
;
1860 ret
= parse_uint(content
, &channel
->attr
.num_subbuf
);
1863 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1866 } else if (!strcmp((const char *) attr_node
->name
,
1867 config_element_switch_timer_interval
)) {
1869 uint64_t switch_timer_interval
= 0;
1871 /* switch_timer_interval */
1872 content
= xmlNodeGetContent(attr_node
);
1874 ret
= -LTTNG_ERR_NOMEM
;
1878 ret
= parse_uint(content
, &switch_timer_interval
);
1881 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1885 if (switch_timer_interval
> UINT_MAX
) {
1886 WARN("switch_timer_interval out of range.");
1887 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1891 channel
->attr
.switch_timer_interval
=
1892 switch_timer_interval
;
1893 } else if (!strcmp((const char *) attr_node
->name
,
1894 config_element_read_timer_interval
)) {
1896 uint64_t read_timer_interval
= 0;
1898 /* read_timer_interval */
1899 content
= xmlNodeGetContent(attr_node
);
1901 ret
= -LTTNG_ERR_NOMEM
;
1905 ret
= parse_uint(content
, &read_timer_interval
);
1908 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1912 if (read_timer_interval
> UINT_MAX
) {
1913 WARN("read_timer_interval out of range.");
1914 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1918 channel
->attr
.read_timer_interval
=
1919 read_timer_interval
;
1920 } else if (!strcmp((const char *) attr_node
->name
,
1921 config_element_output_type
)) {
1925 content
= xmlNodeGetContent(attr_node
);
1927 ret
= -LTTNG_ERR_NOMEM
;
1931 ret
= get_output_type(content
);
1934 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1938 channel
->attr
.output
= ret
;
1939 } else if (!strcmp((const char *) attr_node
->name
,
1940 config_element_tracefile_size
)) {
1943 /* tracefile_size */
1944 content
= xmlNodeGetContent(attr_node
);
1946 ret
= -LTTNG_ERR_NOMEM
;
1950 ret
= parse_uint(content
, &channel
->attr
.tracefile_size
);
1953 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1956 } else if (!strcmp((const char *) attr_node
->name
,
1957 config_element_tracefile_count
)) {
1960 /* tracefile_count */
1961 content
= xmlNodeGetContent(attr_node
);
1963 ret
= -LTTNG_ERR_NOMEM
;
1967 ret
= parse_uint(content
, &channel
->attr
.tracefile_count
);
1970 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1973 } else if (!strcmp((const char *) attr_node
->name
,
1974 config_element_live_timer_interval
)) {
1976 uint64_t live_timer_interval
= 0;
1978 /* live_timer_interval */
1979 content
= xmlNodeGetContent(attr_node
);
1981 ret
= -LTTNG_ERR_NOMEM
;
1985 ret
= parse_uint(content
, &live_timer_interval
);
1988 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1992 if (live_timer_interval
> UINT_MAX
) {
1993 WARN("live_timer_interval out of range.");
1994 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1998 channel
->attr
.live_timer_interval
=
1999 live_timer_interval
;
2000 } else if (!strcmp((const char *) attr_node
->name
,
2001 config_element_events
)) {
2003 *events_node
= attr_node
;
2006 *contexts_node
= attr_node
;
2014 int process_context_node(xmlNodePtr context_node
,
2015 struct lttng_handle
*handle
, const char *channel_name
)
2018 struct lttng_event_context context
;
2019 xmlNodePtr context_child_node
= xmlFirstElementChild(context_node
);
2022 assert(channel_name
);
2024 if (!context_child_node
) {
2025 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2029 memset(&context
, 0, sizeof(context
));
2031 if (!strcmp((const char *) context_child_node
->name
,
2032 config_element_type
)) {
2034 xmlChar
*content
= xmlNodeGetContent(context_child_node
);
2037 ret
= -LTTNG_ERR_NOMEM
;
2041 ret
= get_context_type(content
);
2044 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2049 } else if (!strcmp((const char *) context_child_node
->name
,
2050 config_element_context_perf
)) {
2052 xmlNodePtr perf_attr_node
;
2054 context
.ctx
= handle
->domain
.type
== LTTNG_DOMAIN_KERNEL
?
2055 LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER
:
2056 LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER
;
2057 for (perf_attr_node
= xmlFirstElementChild(context_child_node
);
2058 perf_attr_node
; perf_attr_node
=
2059 xmlNextElementSibling(perf_attr_node
)) {
2060 if (!strcmp((const char *) perf_attr_node
->name
,
2061 config_element_type
)) {
2066 content
= xmlNodeGetContent(perf_attr_node
);
2068 ret
= -LTTNG_ERR_NOMEM
;
2072 ret
= parse_uint(content
, &type
);
2075 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2079 if (type
> UINT32_MAX
) {
2080 WARN("perf context type out of range.");
2081 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2085 context
.u
.perf_counter
.type
= type
;
2086 } else if (!strcmp((const char *) perf_attr_node
->name
,
2087 config_element_config
)) {
2089 uint64_t config
= 0;
2092 content
= xmlNodeGetContent(perf_attr_node
);
2094 ret
= -LTTNG_ERR_NOMEM
;
2098 ret
= parse_uint(content
, &config
);
2101 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2105 context
.u
.perf_counter
.config
= config
;
2106 } else if (!strcmp((const char *) perf_attr_node
->name
,
2107 config_element_name
)) {
2112 content
= xmlNodeGetContent(perf_attr_node
);
2114 ret
= -LTTNG_ERR_NOMEM
;
2118 name_len
= strlen((char *) content
);
2119 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
2120 WARN("perf context name too long.");
2121 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2126 strncpy(context
.u
.perf_counter
.name
, (const char *) content
,
2131 } else if (!strcmp((const char *) context_child_node
->name
,
2132 config_element_context_app
)) {
2133 /* application context */
2134 xmlNodePtr app_ctx_node
;
2136 context
.ctx
= LTTNG_EVENT_CONTEXT_APP_CONTEXT
;
2137 for (app_ctx_node
= xmlFirstElementChild(context_child_node
);
2138 app_ctx_node
; app_ctx_node
=
2139 xmlNextElementSibling(app_ctx_node
)) {
2141 char **target
= strcmp(
2142 (const char *) app_ctx_node
->name
,
2143 config_element_context_app_provider_name
) == 0 ?
2144 &context
.u
.app_ctx
.provider_name
:
2145 &context
.u
.app_ctx
.ctx_name
;
2147 content
= xmlNodeGetContent(app_ctx_node
);
2149 ret
= -LTTNG_ERR_NOMEM
;
2153 *target
= (char *) content
;
2156 /* Unrecognized context type */
2157 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2161 ret
= lttng_add_context(handle
, &context
, NULL
, channel_name
);
2162 if (context
.ctx
== LTTNG_EVENT_CONTEXT_APP_CONTEXT
) {
2163 free(context
.u
.app_ctx
.provider_name
);
2164 free(context
.u
.app_ctx
.ctx_name
);
2171 int process_contexts_node(xmlNodePtr contexts_node
,
2172 struct lttng_handle
*handle
, const char *channel_name
)
2175 xmlNodePtr context_node
;
2177 for (context_node
= xmlFirstElementChild(contexts_node
); context_node
;
2178 context_node
= xmlNextElementSibling(context_node
)) {
2179 ret
= process_context_node(context_node
, handle
, channel_name
);
2189 int process_pid_tracker_node(xmlNodePtr pid_tracker_node
,
2190 struct lttng_handle
*handle
)
2193 xmlNodePtr targets_node
= NULL
;
2197 assert(pid_tracker_node
);
2198 /* get the targets node */
2199 for (node
= xmlFirstElementChild(pid_tracker_node
); node
;
2200 node
= xmlNextElementSibling(node
)) {
2201 if (!strcmp((const char *) node
->name
,
2202 config_element_targets
)) {
2203 targets_node
= node
;
2208 if (!targets_node
) {
2209 ret
= LTTNG_ERR_INVALID
;
2213 /* Go through all pid_target node */
2214 child
= xmlChildElementCount(targets_node
);
2216 /* The session is explicitly set to target nothing. */
2217 ret
= lttng_untrack_pid(handle
, -1);
2222 for (node
= xmlFirstElementChild(targets_node
); node
;
2223 node
= xmlNextElementSibling(node
)) {
2224 xmlNodePtr pid_target_node
= node
;
2226 /* get pid node and track it */
2227 for (node
= xmlFirstElementChild(pid_target_node
); node
;
2228 node
= xmlNextElementSibling(node
)) {
2229 if (!strcmp((const char *) node
->name
,
2230 config_element_pid
)) {
2232 xmlChar
*content
= NULL
;
2234 content
= xmlNodeGetContent(node
);
2236 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2240 ret
= parse_int(content
, &pid
);
2243 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2247 ret
= lttng_track_pid(handle
, (int) pid
);
2253 node
= pid_target_node
;
2262 int process_domain_node(xmlNodePtr domain_node
, const char *session_name
)
2265 struct lttng_domain domain
= { 0 };
2266 struct lttng_handle
*handle
= NULL
;
2267 xmlNodePtr channels_node
= NULL
;
2268 xmlNodePtr trackers_node
= NULL
;
2269 xmlNodePtr pid_tracker_node
= NULL
;
2272 assert(session_name
);
2274 ret
= init_domain(domain_node
, &domain
);
2279 handle
= lttng_create_handle(session_name
, &domain
);
2281 ret
= -LTTNG_ERR_NOMEM
;
2285 /* get the channels node */
2286 for (node
= xmlFirstElementChild(domain_node
); node
;
2287 node
= xmlNextElementSibling(node
)) {
2288 if (!strcmp((const char *) node
->name
,
2289 config_element_channels
)) {
2290 channels_node
= node
;
2295 if (!channels_node
) {
2299 /* create all channels */
2300 for (node
= xmlFirstElementChild(channels_node
); node
;
2301 node
= xmlNextElementSibling(node
)) {
2302 struct lttng_channel channel
;
2303 xmlNodePtr contexts_node
= NULL
;
2304 xmlNodePtr events_node
= NULL
;
2305 xmlNodePtr channel_attr_node
;
2307 memset(&channel
, 0, sizeof(channel
));
2308 lttng_channel_set_default_attr(&domain
, &channel
.attr
);
2310 for (channel_attr_node
= xmlFirstElementChild(node
);
2311 channel_attr_node
; channel_attr_node
=
2312 xmlNextElementSibling(channel_attr_node
)) {
2313 ret
= process_channel_attr_node(channel_attr_node
,
2314 &channel
, &contexts_node
, &events_node
);
2320 ret
= lttng_enable_channel(handle
, &channel
);
2325 ret
= process_events_node(events_node
, handle
, channel
.name
);
2330 ret
= process_contexts_node(contexts_node
, handle
,
2337 /* get the trackers node */
2338 for (node
= xmlFirstElementChild(domain_node
); node
;
2339 node
= xmlNextElementSibling(node
)) {
2340 if (!strcmp((const char *) node
->name
,
2341 config_element_trackers
)) {
2342 trackers_node
= node
;
2347 if (!trackers_node
) {
2351 for (node
= xmlFirstElementChild(trackers_node
); node
;
2352 node
= xmlNextElementSibling(node
)) {
2353 if (!strcmp((const char *)node
->name
,config_element_pid_tracker
)) {
2354 pid_tracker_node
= node
;
2355 ret
= process_pid_tracker_node(pid_tracker_node
, handle
);
2362 if (!pid_tracker_node
) {
2363 lttng_track_pid(handle
, -1);
2367 lttng_destroy_handle(handle
);
2372 int process_session_node(xmlNodePtr session_node
, const char *session_name
,
2375 int ret
, started
= -1, snapshot_mode
= -1;
2376 uint64_t live_timer_interval
= UINT64_MAX
;
2377 xmlChar
*name
= NULL
;
2378 xmlChar
*shm_path
= NULL
;
2379 xmlNodePtr domains_node
= NULL
;
2380 xmlNodePtr output_node
= NULL
;
2382 struct lttng_domain
*kernel_domain
= NULL
;
2383 struct lttng_domain
*ust_domain
= NULL
;
2384 struct lttng_domain
*jul_domain
= NULL
;
2385 struct lttng_domain
*log4j_domain
= NULL
;
2386 struct lttng_domain
*python_domain
= NULL
;
2388 for (node
= xmlFirstElementChild(session_node
); node
;
2389 node
= xmlNextElementSibling(node
)) {
2390 if (!name
&& !strcmp((const char *) node
->name
,
2391 config_element_name
)) {
2393 xmlChar
*node_content
= xmlNodeGetContent(node
);
2394 if (!node_content
) {
2395 ret
= -LTTNG_ERR_NOMEM
;
2399 name
= node_content
;
2400 } else if (!domains_node
&& !strcmp((const char *) node
->name
,
2401 config_element_domains
)) {
2403 domains_node
= node
;
2404 } else if (started
== -1 && !strcmp((const char *) node
->name
,
2405 config_element_started
)) {
2407 xmlChar
*node_content
= xmlNodeGetContent(node
);
2408 if (!node_content
) {
2409 ret
= -LTTNG_ERR_NOMEM
;
2413 ret
= parse_bool(node_content
, &started
);
2416 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2419 } else if (!output_node
&& !strcmp((const char *) node
->name
,
2420 config_element_output
)) {
2423 } else if (!shm_path
&& !strcmp((const char *) node
->name
,
2424 config_element_shared_memory_path
)) {
2425 /* shared memory path */
2426 xmlChar
*node_content
= xmlNodeGetContent(node
);
2427 if (!node_content
) {
2428 ret
= -LTTNG_ERR_NOMEM
;
2432 shm_path
= node_content
;
2434 /* attributes, snapshot_mode or live_timer_interval */
2435 xmlNodePtr attributes_child
=
2436 xmlFirstElementChild(node
);
2438 if (!strcmp((const char *) attributes_child
->name
,
2439 config_element_snapshot_mode
)) {
2441 xmlChar
*snapshot_mode_content
=
2442 xmlNodeGetContent(attributes_child
);
2443 if (!snapshot_mode_content
) {
2444 ret
= -LTTNG_ERR_NOMEM
;
2448 ret
= parse_bool(snapshot_mode_content
, &snapshot_mode
);
2449 free(snapshot_mode_content
);
2451 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2455 /* live_timer_interval */
2456 xmlChar
*timer_interval_content
=
2457 xmlNodeGetContent(attributes_child
);
2458 if (!timer_interval_content
) {
2459 ret
= -LTTNG_ERR_NOMEM
;
2463 ret
= parse_uint(timer_interval_content
, &live_timer_interval
);
2464 free(timer_interval_content
);
2466 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2474 /* Mandatory attribute, as defined in the session XSD */
2475 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2479 if (session_name
&& strcmp((char *) name
, session_name
)) {
2480 /* This is not the session we are looking for */
2481 ret
= -LTTNG_ERR_NO_SESSION
;
2485 /* Init domains to create the session handles */
2486 for (node
= xmlFirstElementChild(domains_node
); node
;
2487 node
= xmlNextElementSibling(node
)) {
2488 struct lttng_domain
*domain
;
2490 domain
= zmalloc(sizeof(*domain
));
2492 ret
= -LTTNG_ERR_NOMEM
;
2496 ret
= init_domain(node
, domain
);
2498 goto domain_init_error
;
2501 switch (domain
->type
) {
2502 case LTTNG_DOMAIN_KERNEL
:
2503 if (kernel_domain
) {
2504 /* Same domain seen twice, invalid! */
2505 goto domain_init_error
;
2507 kernel_domain
= domain
;
2509 case LTTNG_DOMAIN_UST
:
2511 /* Same domain seen twice, invalid! */
2512 goto domain_init_error
;
2514 ust_domain
= domain
;
2516 case LTTNG_DOMAIN_JUL
:
2518 /* Same domain seen twice, invalid! */
2519 goto domain_init_error
;
2521 jul_domain
= domain
;
2523 case LTTNG_DOMAIN_LOG4J
:
2525 /* Same domain seen twice, invalid! */
2526 goto domain_init_error
;
2528 log4j_domain
= domain
;
2530 case LTTNG_DOMAIN_PYTHON
:
2531 if (python_domain
) {
2532 /* Same domain seen twice, invalid! */
2533 goto domain_init_error
;
2535 python_domain
= domain
;
2538 WARN("Invalid domain type");
2539 goto domain_init_error
;
2544 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2549 /* Destroy session if it exists */
2550 ret
= lttng_destroy_session((const char *) name
);
2551 if (ret
&& ret
!= -LTTNG_ERR_SESS_NOT_FOUND
) {
2552 ERR("Failed to destroy existing session.");
2557 /* Create session type depending on output type */
2558 if (snapshot_mode
&& snapshot_mode
!= -1) {
2559 ret
= create_snapshot_session((const char *) name
, output_node
);
2560 } else if (live_timer_interval
&&
2561 live_timer_interval
!= UINT64_MAX
) {
2562 ret
= create_session((const char *) name
, kernel_domain
,
2563 ust_domain
, jul_domain
, log4j_domain
,
2564 output_node
, live_timer_interval
);
2566 /* regular session */
2567 ret
= create_session((const char *) name
, kernel_domain
,
2568 ust_domain
, jul_domain
, log4j_domain
,
2569 output_node
, UINT64_MAX
);
2576 ret
= lttng_set_session_shm_path((const char *) name
,
2577 (const char *) shm_path
);
2583 for (node
= xmlFirstElementChild(domains_node
); node
;
2584 node
= xmlNextElementSibling(node
)) {
2585 ret
= process_domain_node(node
, (const char *) name
);
2592 ret
= lttng_start_tracing((const char *) name
);
2600 ERR("Failed to load session %s: %s", (const char *) name
,
2601 lttng_strerror(ret
));
2602 lttng_destroy_session((const char *) name
);
2606 free(kernel_domain
);
2610 free(python_domain
);
2617 * Return 1 if the given path is readable by the current UID or 0 if not.
2618 * Return -1 if the path is EPERM.
2620 static int validate_file_read_creds(const char *path
)
2626 /* Can we read the file. */
2627 ret
= access(path
, R_OK
);
2631 if (errno
== EACCES
) {
2642 int load_session_from_file(const char *path
, const char *session_name
,
2643 struct session_config_validation_ctx
*validation_ctx
, int override
)
2645 int ret
, session_found
= !session_name
;
2646 xmlDocPtr doc
= NULL
;
2647 xmlNodePtr sessions_node
;
2648 xmlNodePtr session_node
;
2651 assert(validation_ctx
);
2653 ret
= validate_file_read_creds(path
);
2656 ret
= -LTTNG_ERR_EPERM
;
2658 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2663 doc
= xmlParseFile(path
);
2665 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2669 ret
= xmlSchemaValidateDoc(validation_ctx
->schema_validation_ctx
, doc
);
2671 ERR("Session configuration file validation failed");
2672 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2676 sessions_node
= xmlDocGetRootElement(doc
);
2677 if (!sessions_node
) {
2681 for (session_node
= xmlFirstElementChild(sessions_node
);
2682 session_node
; session_node
=
2683 xmlNextElementSibling(session_node
)) {
2684 ret
= process_session_node(session_node
,
2685 session_name
, override
);
2686 if (session_name
&& ret
== 0) {
2687 /* Target session found and loaded */
2695 ret
= session_found
? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT
;
2700 /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */
2702 struct dirent
*alloc_dirent(const char *path
)
2706 struct dirent
*entry
;
2708 name_max
= pathconf(path
, _PC_NAME_MAX
);
2709 if (name_max
== -1) {
2710 name_max
= PATH_MAX
;
2712 len
= offsetof(struct dirent
, d_name
) + name_max
+ 1;
2713 entry
= zmalloc(len
);
2718 int load_session_from_path(const char *path
, const char *session_name
,
2719 struct session_config_validation_ctx
*validation_ctx
, int override
)
2721 int ret
, session_found
= !session_name
;
2722 DIR *directory
= NULL
;
2725 assert(validation_ctx
);
2727 directory
= opendir(path
);
2731 /* Try the file loading. */
2734 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2737 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2742 struct dirent
*entry
;
2743 struct dirent
*result
;
2744 char *file_path
= NULL
;
2745 size_t path_len
= strlen(path
);
2747 if (path_len
>= PATH_MAX
) {
2748 ret
= -LTTNG_ERR_INVALID
;
2752 entry
= alloc_dirent(path
);
2754 ret
= -LTTNG_ERR_NOMEM
;
2758 file_path
= zmalloc(PATH_MAX
);
2760 ret
= -LTTNG_ERR_NOMEM
;
2765 strncpy(file_path
, path
, path_len
);
2766 if (file_path
[path_len
- 1] != '/') {
2767 file_path
[path_len
++] = '/';
2771 /* Search for *.lttng files */
2772 while (!readdir_r(directory
, entry
, &result
) && result
) {
2773 size_t file_name_len
= strlen(result
->d_name
);
2775 if (file_name_len
<=
2776 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
)) {
2780 if (path_len
+ file_name_len
>= PATH_MAX
) {
2784 if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
,
2785 result
->d_name
+ file_name_len
- sizeof(
2786 DEFAULT_SESSION_CONFIG_FILE_EXTENSION
) + 1)) {
2790 strncpy(file_path
+ path_len
, result
->d_name
, file_name_len
);
2791 file_path
[path_len
+ file_name_len
] = '\0';
2793 ret
= load_session_from_file(file_path
, session_name
,
2794 validation_ctx
, override
);
2795 if (session_name
&& !ret
) {
2804 ret
= load_session_from_file(path
, session_name
,
2805 validation_ctx
, override
);
2815 if (closedir(directory
)) {
2820 if (!session_found
) {
2821 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2828 * Validate that the given path's credentials and the current process have the
2829 * same UID. If so, return 1 else return 0 if it does NOT match.
2831 static int validate_path_creds(const char *path
)
2833 int ret
, uid
= getuid();
2842 ret
= stat(path
, &buf
);
2844 if (errno
!= ENOENT
) {
2847 ret
= -LTTNG_ERR_INVALID
;
2851 if (buf
.st_uid
!= uid
) {
2862 int config_load_session(const char *path
, const char *session_name
,
2863 int override
, unsigned int autoload
)
2866 const char *path_ptr
= NULL
;
2867 struct session_config_validation_ctx validation_ctx
= { 0 };
2869 ret
= init_session_config_validation_ctx(&validation_ctx
);
2876 const char *sys_path
;
2879 home_path
= utils_get_home_dir();
2881 char path
[PATH_MAX
];
2884 * Try user session configuration path. Ignore error here so we can
2885 * continue loading the system wide sessions.
2888 ret
= snprintf(path
, sizeof(path
),
2889 DEFAULT_SESSION_HOME_CONFIGPATH
"/"
2890 DEFAULT_SESSION_CONFIG_AUTOLOAD
, home_path
);
2892 PERROR("snprintf session autoload home config path");
2897 * Credentials are only validated for the autoload in order to
2898 * avoid any user session daemon to try to load kernel sessions
2899 * automatically and failing all the times.
2901 ret
= validate_path_creds(path
);
2906 ret
= snprintf(path
, sizeof(path
),
2907 DEFAULT_SESSION_HOME_CONFIGPATH
, home_path
);
2909 PERROR("snprintf session home config path");
2915 ret
= load_session_from_path(path_ptr
, session_name
,
2916 &validation_ctx
, override
);
2917 if (ret
&& ret
!= -LTTNG_ERR_LOAD_SESSION_NOENT
) {
2921 * Continue even if the session was found since we have to try
2922 * the system wide sessions.
2927 /* Reset path pointer for the system wide dir. */
2930 /* Try system wide configuration directory. */
2932 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
"/"
2933 DEFAULT_SESSION_CONFIG_AUTOLOAD
;
2934 ret
= validate_path_creds(sys_path
);
2936 path_ptr
= sys_path
;
2939 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
;
2940 path_ptr
= sys_path
;
2944 ret
= load_session_from_path(path_ptr
, session_name
,
2945 &validation_ctx
, override
);
2948 ret
= access(path
, F_OK
);
2953 ret
= -LTTNG_ERR_INVALID
;
2954 WARN("Session configuration path does not exist.");
2957 ret
= -LTTNG_ERR_EPERM
;
2960 ret
= -LTTNG_ERR_UNK
;
2966 ret
= load_session_from_path(path
, session_name
,
2967 &validation_ctx
, override
);
2970 fini_session_config_validation_ctx(&validation_ctx
);
2971 if (ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
&& !session_name
&& !path
) {
2973 * Don't report an error if no sessions are found when called
2974 * without a session_name or a search path.