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.
28 #include <sys/types.h>
32 #include <common/defaults.h>
33 #include <common/error.h>
34 #include <common/macros.h>
35 #include <common/utils.h>
36 #include <common/compat/getenv.h>
37 #include <lttng/lttng-error.h>
38 #include <libxml/parser.h>
39 #include <libxml/valid.h>
40 #include <libxml/xmlschemas.h>
41 #include <libxml/tree.h>
42 #include <lttng/lttng.h>
43 #include <lttng/snapshot.h>
46 #include "config-internal.h"
48 struct handler_filter_args
{
50 config_entry_handler_cb handler
;
54 struct session_config_validation_ctx
{
55 xmlSchemaParserCtxtPtr parser_ctx
;
57 xmlSchemaValidCtxtPtr schema_validation_ctx
;
60 const char * const config_str_yes
= "yes";
61 const char * const config_str_true
= "true";
62 const char * const config_str_on
= "on";
63 const char * const config_str_no
= "no";
64 const char * const config_str_false
= "false";
65 const char * const config_str_off
= "off";
66 const char * const config_xml_encoding
= "UTF-8";
67 const size_t config_xml_encoding_bytes_per_char
= 2; /* Size of the encoding's largest character */
68 const char * const config_xml_indent_string
= "\t";
69 const char * const config_xml_true
= "true";
70 const char * const config_xml_false
= "false";
72 const char * const config_element_channel
= "channel";
73 const char * const config_element_channels
= "channels";
74 const char * const config_element_domain
= "domain";
75 const char * const config_element_domains
= "domains";
76 const char * const config_element_event
= "event";
77 const char * const config_element_events
= "events";
78 const char * const config_element_context
= "context";
79 const char * const config_element_contexts
= "contexts";
80 const char * const config_element_attributes
= "attributes";
81 const char * const config_element_exclusion
= "exclusion";
82 const char * const config_element_exclusions
= "exclusions";
83 const char * const config_element_function_attributes
= "function_attributes";
84 const char * const config_element_probe_attributes
= "probe_attributes";
85 const char * const config_element_symbol_name
= "symbol_name";
86 const char * const config_element_address
= "address";
87 const char * const config_element_offset
= "offset";
88 const char * const config_element_name
= "name";
89 const char * const config_element_enabled
= "enabled";
90 const char * const config_element_overwrite_mode
= "overwrite_mode";
91 const char * const config_element_subbuf_size
= "subbuffer_size";
92 const char * const config_element_num_subbuf
= "subbuffer_count";
93 const char * const config_element_switch_timer_interval
= "switch_timer_interval";
94 const char * const config_element_read_timer_interval
= "read_timer_interval";
95 const char * const config_element_output
= "output";
96 const char * const config_element_output_type
= "output_type";
97 const char * const config_element_tracefile_size
= "tracefile_size";
98 const char * const config_element_tracefile_count
= "tracefile_count";
99 const char * const config_element_live_timer_interval
= "live_timer_interval";
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_perf
= "perf";
105 const char * const config_element_config
= "config";
106 const char * const config_element_started
= "started";
107 const char * const config_element_snapshot_mode
= "snapshot_mode";
108 const char * const config_element_loglevel
= "loglevel";
109 const char * const config_element_loglevel_type
= "loglevel_type";
110 const char * const config_element_filter
= "filter";
111 const char * const config_element_snapshot_outputs
= "snapshot_outputs";
112 const char * const config_element_consumer_output
= "consumer_output";
113 const char * const config_element_destination
= "destination";
114 const char * const config_element_path
= "path";
115 const char * const config_element_net_output
= "net_output";
116 const char * const config_element_control_uri
= "control_uri";
117 const char * const config_element_data_uri
= "data_uri";
118 const char * const config_element_max_size
= "max_size";
119 const char * const config_element_pid
= "pid";
120 const char * const config_element_pids
= "pids";
121 const char * const config_element_shared_memory_path
= "shared_memory_path";
122 const char * const config_element_pid_tracker
= "pid_tracker";
123 const char * const config_element_trackers
= "trackers";
124 const char * const config_element_targets
= "targets";
125 const char * const config_element_target_pid
= "pid_target";
127 const char * const config_domain_type_kernel
= "KERNEL";
128 const char * const config_domain_type_ust
= "UST";
129 const char * const config_domain_type_jul
= "JUL";
130 const char * const config_domain_type_log4j
= "LOG4J";
131 const char * const config_domain_type_python
= "PYTHON";
133 const char * const config_buffer_type_per_pid
= "PER_PID";
134 const char * const config_buffer_type_per_uid
= "PER_UID";
135 const char * const config_buffer_type_global
= "GLOBAL";
137 const char * const config_overwrite_mode_discard
= "DISCARD";
138 const char * const config_overwrite_mode_overwrite
= "OVERWRITE";
140 const char * const config_output_type_splice
= "SPLICE";
141 const char * const config_output_type_mmap
= "MMAP";
143 const char * const config_loglevel_type_all
= "ALL";
144 const char * const config_loglevel_type_range
= "RANGE";
145 const char * const config_loglevel_type_single
= "SINGLE";
147 const char * const config_event_type_all
= "ALL";
148 const char * const config_event_type_tracepoint
= "TRACEPOINT";
149 const char * const config_event_type_probe
= "PROBE";
150 const char * const config_event_type_function
= "FUNCTION";
151 const char * const config_event_type_function_entry
= "FUNCTION_ENTRY";
152 const char * const config_event_type_noop
= "NOOP";
153 const char * const config_event_type_syscall
= "SYSCALL";
154 const char * const config_event_type_kprobe
= "KPROBE";
155 const char * const config_event_type_kretprobe
= "KRETPROBE";
157 const char * const config_event_context_pid
= "PID";
158 const char * const config_event_context_procname
= "PROCNAME";
159 const char * const config_event_context_prio
= "PRIO";
160 const char * const config_event_context_nice
= "NICE";
161 const char * const config_event_context_vpid
= "VPID";
162 const char * const config_event_context_tid
= "TID";
163 const char * const config_event_context_vtid
= "VTID";
164 const char * const config_event_context_ppid
= "PPID";
165 const char * const config_event_context_vppid
= "VPPID";
166 const char * const config_event_context_pthread_id
= "PTHREAD_ID";
167 const char * const config_event_context_hostname
= "HOSTNAME";
168 const char * const config_event_context_ip
= "IP";
169 const char * const config_event_context_perf_thread_counter
= "PERF_THREAD_COUNTER";
171 struct consumer_output
{
178 static int config_entry_handler_filter(struct handler_filter_args
*args
,
179 const char *section
, const char *name
, const char *value
)
182 struct config_entry entry
= { section
, name
, value
};
186 if (!section
|| !name
|| !value
) {
192 if (strcmp(args
->section
, section
)) {
197 ret
= args
->handler(&entry
, args
->user_data
);
203 int config_get_section_entries(const char *override_path
, const char *section
,
204 config_entry_handler_cb handler
, void *user_data
)
208 FILE *config_file
= NULL
;
209 struct handler_filter_args filter
= { section
, handler
, user_data
};
211 /* First, try system-wide conf. file. */
212 path
= DEFAULT_DAEMON_SYSTEM_CONFIGPATH
;
214 config_file
= fopen(path
, "r");
216 DBG("Loading daemon conf file at %s", path
);
218 * Return value is not very important here since error or not, we
219 * continue and try the next possible conf. file.
221 (void) ini_parse_file(config_file
,
222 (ini_entry_handler
) config_entry_handler_filter
,
227 /* Second is the user local configuration. */
228 path
= utils_get_home_dir();
230 char fullpath
[PATH_MAX
];
232 ret
= snprintf(fullpath
, sizeof(fullpath
),
233 DEFAULT_DAEMON_HOME_CONFIGPATH
, path
);
235 PERROR("snprintf user conf. path");
239 config_file
= fopen(fullpath
, "r");
241 DBG("Loading daemon user conf file at %s", path
);
243 * Return value is not very important here since error or not, we
244 * continue and try the next possible conf. file.
246 (void) ini_parse_file(config_file
,
247 (ini_entry_handler
) config_entry_handler_filter
,
253 /* Final path is the one that the user might have provided. */
255 config_file
= fopen(override_path
, "r");
257 DBG("Loading daemon command line conf file at %s", override_path
);
258 (void) ini_parse_file(config_file
,
259 (ini_entry_handler
) config_entry_handler_filter
,
263 ERR("Failed to open daemon configuration file at %s",
270 /* Everything went well. */
278 int config_parse_value(const char *value
)
281 char *endptr
, *lower_str
;
291 v
= strtoul(value
, &endptr
, 10);
292 if (endptr
!= value
) {
297 lower_str
= zmalloc(len
+ 1);
304 for (i
= 0; i
< len
; i
++) {
305 lower_str
[i
] = tolower(value
[i
]);
308 if (!strcmp(lower_str
, config_str_yes
) ||
309 !strcmp(lower_str
, config_str_true
) ||
310 !strcmp(lower_str
, config_str_on
)) {
312 } else if (!strcmp(lower_str
, config_str_no
) ||
313 !strcmp(lower_str
, config_str_false
) ||
314 !strcmp(lower_str
, config_str_off
)) {
326 * Returns a xmlChar string which must be released using xmlFree().
328 static xmlChar
*encode_string(const char *in_str
)
330 xmlChar
*out_str
= NULL
;
331 xmlCharEncodingHandlerPtr handler
;
332 int out_len
, ret
, in_len
;
336 handler
= xmlFindCharEncodingHandler(config_xml_encoding
);
338 ERR("xmlFindCharEncodingHandler return NULL!. Configure issue!");
342 in_len
= strlen(in_str
);
344 * Add 1 byte for the NULL terminted character. The factor 4 here is
345 * used because UTF-8 characters can take up to 4 bytes.
347 out_len
= (in_len
* 4) + 1;
348 out_str
= xmlMalloc(out_len
);
353 ret
= handler
->input(out_str
, &out_len
, (const xmlChar
*) in_str
, &in_len
);
360 /* out_len is now the size of out_str */
361 out_str
[out_len
] = '\0';
367 struct config_writer
*config_writer_create(int fd_output
, int indent
)
370 struct config_writer
*writer
;
371 xmlOutputBufferPtr buffer
;
373 writer
= zmalloc(sizeof(struct config_writer
));
375 PERROR("zmalloc config_writer_create");
379 buffer
= xmlOutputBufferCreateFd(fd_output
, NULL
);
384 writer
->writer
= xmlNewTextWriter(buffer
);
385 ret
= xmlTextWriterStartDocument(writer
->writer
, NULL
,
386 config_xml_encoding
, NULL
);
391 ret
= xmlTextWriterSetIndentString(writer
->writer
,
392 BAD_CAST config_xml_indent_string
);
397 ret
= xmlTextWriterSetIndent(writer
->writer
, indent
);
405 config_writer_destroy(writer
);
410 int config_writer_destroy(struct config_writer
*writer
)
419 if (xmlTextWriterEndDocument(writer
->writer
) < 0) {
420 WARN("Could not close XML document");
424 if (writer
->writer
) {
425 xmlFreeTextWriter(writer
->writer
);
434 int config_writer_open_element(struct config_writer
*writer
,
435 const char *element_name
)
438 xmlChar
*encoded_element_name
;
440 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
445 encoded_element_name
= encode_string(element_name
);
446 if (!encoded_element_name
) {
451 ret
= xmlTextWriterStartElement(writer
->writer
, encoded_element_name
);
452 xmlFree(encoded_element_name
);
454 return ret
> 0 ? 0 : ret
;
458 int config_writer_close_element(struct config_writer
*writer
)
462 if (!writer
|| !writer
->writer
) {
467 ret
= xmlTextWriterEndElement(writer
->writer
);
469 return ret
> 0 ? 0 : ret
;
473 int config_writer_write_element_unsigned_int(struct config_writer
*writer
,
474 const char *element_name
, uint64_t value
)
477 xmlChar
*encoded_element_name
;
479 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
484 encoded_element_name
= encode_string(element_name
);
485 if (!encoded_element_name
) {
490 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
491 encoded_element_name
, "%" PRIu64
, value
);
492 xmlFree(encoded_element_name
);
494 return ret
> 0 ? 0 : ret
;
498 int config_writer_write_element_signed_int(struct config_writer
*writer
,
499 const char *element_name
, int64_t value
)
502 xmlChar
*encoded_element_name
;
504 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0]) {
509 encoded_element_name
= encode_string(element_name
);
510 if (!encoded_element_name
) {
515 ret
= xmlTextWriterWriteFormatElement(writer
->writer
,
516 encoded_element_name
, "%" PRIi64
, value
);
517 xmlFree(encoded_element_name
);
519 return ret
> 0 ? 0 : ret
;
523 int config_writer_write_element_bool(struct config_writer
*writer
,
524 const char *element_name
, int value
)
526 return config_writer_write_element_string(writer
, element_name
,
527 value
? config_xml_true
: config_xml_false
);
531 int config_writer_write_element_string(struct config_writer
*writer
,
532 const char *element_name
, const char *value
)
535 xmlChar
*encoded_element_name
= NULL
;
536 xmlChar
*encoded_value
= NULL
;
538 if (!writer
|| !writer
->writer
|| !element_name
|| !element_name
[0] ||
544 encoded_element_name
= encode_string(element_name
);
545 if (!encoded_element_name
) {
550 encoded_value
= encode_string(value
);
551 if (!encoded_value
) {
556 ret
= xmlTextWriterWriteElement(writer
->writer
, encoded_element_name
,
559 xmlFree(encoded_element_name
);
560 xmlFree(encoded_value
);
561 return ret
> 0 ? 0 : ret
;
565 void xml_error_handler(void *ctx
, const char *format
, ...)
571 va_start(args
, format
);
572 ret
= vasprintf(&errMsg
, format
, args
);
575 ERR("String allocation failed in xml error handler");
579 fprintf(stderr
, "XML Error: %s", errMsg
);
584 void fini_session_config_validation_ctx(
585 struct session_config_validation_ctx
*ctx
)
587 if (ctx
->parser_ctx
) {
588 xmlSchemaFreeParserCtxt(ctx
->parser_ctx
);
592 xmlSchemaFree(ctx
->schema
);
595 if (ctx
->schema_validation_ctx
) {
596 xmlSchemaFreeValidCtxt(ctx
->schema_validation_ctx
);
599 memset(ctx
, 0, sizeof(struct session_config_validation_ctx
));
603 char *get_session_config_xsd_path()
606 const char *base_path
= lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV
);
607 size_t base_path_len
;
611 base_path
= DEFAULT_SESSION_CONFIG_XSD_PATH
;
614 base_path_len
= strlen(base_path
);
615 max_path_len
= base_path_len
+
616 sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME
) + 1;
617 xsd_path
= zmalloc(max_path_len
);
622 strncpy(xsd_path
, base_path
, max_path_len
);
623 if (xsd_path
[base_path_len
- 1] != '/') {
624 xsd_path
[base_path_len
++] = '/';
627 strncpy(xsd_path
+ base_path_len
, DEFAULT_SESSION_CONFIG_XSD_FILENAME
,
628 max_path_len
- base_path_len
);
634 int init_session_config_validation_ctx(
635 struct session_config_validation_ctx
*ctx
)
638 char *xsd_path
= get_session_config_xsd_path();
641 ret
= -LTTNG_ERR_NOMEM
;
645 ctx
->parser_ctx
= xmlSchemaNewParserCtxt(xsd_path
);
646 if (!ctx
->parser_ctx
) {
647 ERR("XSD parser context creation failed");
648 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
651 xmlSchemaSetParserErrors(ctx
->parser_ctx
, xml_error_handler
,
652 xml_error_handler
, NULL
);
654 ctx
->schema
= xmlSchemaParse(ctx
->parser_ctx
);
656 ERR("XSD parsing failed");
657 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
661 ctx
->schema_validation_ctx
= xmlSchemaNewValidCtxt(ctx
->schema
);
662 if (!ctx
->schema_validation_ctx
) {
663 ERR("XSD validation context creation failed");
664 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
668 xmlSchemaSetValidErrors(ctx
->schema_validation_ctx
, xml_error_handler
,
669 xml_error_handler
, NULL
);
674 fini_session_config_validation_ctx(ctx
);
682 int parse_uint(xmlChar
*str
, uint64_t *val
)
692 *val
= strtoull((const char *) str
, &endptr
, 10);
693 if (!endptr
|| *endptr
) {
704 int parse_int(xmlChar
*str
, int64_t *val
)
714 *val
= strtoll((const char *) str
, &endptr
, 10);
715 if (!endptr
|| *endptr
) {
726 int parse_bool(xmlChar
*str
, int *val
)
735 if (!strcmp((const char *) str
, config_xml_true
)) {
737 } else if (!strcmp((const char *) str
, config_xml_false
)) {
740 WARN("Invalid boolean value encoutered (%s).",
749 int get_domain_type(xmlChar
*domain
)
757 if (!strcmp((char *) domain
, config_domain_type_kernel
)) {
758 ret
= LTTNG_DOMAIN_KERNEL
;
759 } else if (!strcmp((char *) domain
, config_domain_type_ust
)) {
760 ret
= LTTNG_DOMAIN_UST
;
761 } else if (!strcmp((char *) domain
, config_domain_type_jul
)) {
762 ret
= LTTNG_DOMAIN_JUL
;
763 } else if (!strcmp((char *) domain
, config_domain_type_log4j
)) {
764 ret
= LTTNG_DOMAIN_LOG4J
;
765 } else if (!strcmp((char *) domain
, config_domain_type_python
)) {
766 ret
= LTTNG_DOMAIN_PYTHON
;
777 int get_buffer_type(xmlChar
*buffer_type
)
785 if (!strcmp((char *) buffer_type
, config_buffer_type_global
)) {
786 ret
= LTTNG_BUFFER_GLOBAL
;
787 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_uid
)) {
788 ret
= LTTNG_BUFFER_PER_UID
;
789 } else if (!strcmp((char *) buffer_type
, config_buffer_type_per_pid
)) {
790 ret
= LTTNG_BUFFER_PER_PID
;
801 int get_overwrite_mode(xmlChar
*overwrite_mode
)
805 if (!overwrite_mode
) {
809 if (!strcmp((char *) overwrite_mode
, config_overwrite_mode_overwrite
)) {
811 } else if (!strcmp((char *) overwrite_mode
,
812 config_overwrite_mode_discard
)) {
824 int get_output_type(xmlChar
*output_type
)
832 if (!strcmp((char *) output_type
, config_output_type_mmap
)) {
833 ret
= LTTNG_EVENT_MMAP
;
834 } else if (!strcmp((char *) output_type
, config_output_type_splice
)) {
835 ret
= LTTNG_EVENT_SPLICE
;
846 int get_event_type(xmlChar
*event_type
)
854 if (!strcmp((char *) event_type
, config_event_type_all
)) {
855 ret
= LTTNG_EVENT_ALL
;
856 } else if (!strcmp((char *) event_type
, config_event_type_tracepoint
)) {
857 ret
= LTTNG_EVENT_TRACEPOINT
;
858 } else if (!strcmp((char *) event_type
, config_event_type_probe
)) {
859 ret
= LTTNG_EVENT_PROBE
;
860 } else if (!strcmp((char *) event_type
, config_event_type_function
)) {
861 ret
= LTTNG_EVENT_FUNCTION
;
862 } else if (!strcmp((char *) event_type
,
863 config_event_type_function_entry
)) {
864 ret
= LTTNG_EVENT_FUNCTION_ENTRY
;
865 } else if (!strcmp((char *) event_type
, config_event_type_noop
)) {
866 ret
= LTTNG_EVENT_NOOP
;
867 } else if (!strcmp((char *) event_type
, config_event_type_syscall
)) {
868 ret
= LTTNG_EVENT_SYSCALL
;
879 int get_loglevel_type(xmlChar
*loglevel_type
)
883 if (!loglevel_type
) {
887 if (!strcmp((char *) loglevel_type
, config_loglevel_type_all
)) {
888 ret
= LTTNG_EVENT_LOGLEVEL_ALL
;
889 } else if (!strcmp((char *) loglevel_type
,
890 config_loglevel_type_range
)) {
891 ret
= LTTNG_EVENT_LOGLEVEL_RANGE
;
892 } else if (!strcmp((char *) loglevel_type
,
893 config_loglevel_type_single
)) {
894 ret
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
905 * Return the context type or -1 on error.
908 int get_context_type(xmlChar
*context_type
)
916 if (!strcmp((char *) context_type
, config_event_context_pid
)) {
917 ret
= LTTNG_EVENT_CONTEXT_PID
;
918 } else if (!strcmp((char *) context_type
,
919 config_event_context_procname
)) {
920 ret
= LTTNG_EVENT_CONTEXT_PROCNAME
;
921 } else if (!strcmp((char *) context_type
,
922 config_event_context_prio
)) {
923 ret
= LTTNG_EVENT_CONTEXT_PRIO
;
924 } else if (!strcmp((char *) context_type
,
925 config_event_context_nice
)) {
926 ret
= LTTNG_EVENT_CONTEXT_NICE
;
927 } else if (!strcmp((char *) context_type
,
928 config_event_context_vpid
)) {
929 ret
= LTTNG_EVENT_CONTEXT_VPID
;
930 } else if (!strcmp((char *) context_type
,
931 config_event_context_tid
)) {
932 ret
= LTTNG_EVENT_CONTEXT_TID
;
933 } else if (!strcmp((char *) context_type
,
934 config_event_context_vtid
)) {
935 ret
= LTTNG_EVENT_CONTEXT_VTID
;
936 } else if (!strcmp((char *) context_type
,
937 config_event_context_ppid
)) {
938 ret
= LTTNG_EVENT_CONTEXT_PPID
;
939 } else if (!strcmp((char *) context_type
,
940 config_event_context_vppid
)) {
941 ret
= LTTNG_EVENT_CONTEXT_VPPID
;
942 } else if (!strcmp((char *) context_type
,
943 config_event_context_pthread_id
)) {
944 ret
= LTTNG_EVENT_CONTEXT_PTHREAD_ID
;
945 } else if (!strcmp((char *) context_type
,
946 config_event_context_hostname
)) {
947 ret
= LTTNG_EVENT_CONTEXT_HOSTNAME
;
948 } else if (!strcmp((char *) context_type
,
949 config_event_context_ip
)) {
950 ret
= LTTNG_EVENT_CONTEXT_IP
;
961 int init_domain(xmlNodePtr domain_node
, struct lttng_domain
*domain
)
966 for (node
= xmlFirstElementChild(domain_node
); node
;
967 node
= xmlNextElementSibling(node
)) {
968 if (!strcmp((const char *) node
->name
, config_element_type
)) {
970 xmlChar
*node_content
= xmlNodeGetContent(node
);
972 ret
= -LTTNG_ERR_NOMEM
;
976 ret
= get_domain_type(node_content
);
979 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
984 } else if (!strcmp((const char *) node
->name
,
985 config_element_buffer_type
)) {
987 xmlChar
*node_content
= xmlNodeGetContent(node
);
989 ret
= -LTTNG_ERR_NOMEM
;
993 ret
= get_buffer_type(node_content
);
996 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1000 domain
->buf_type
= ret
;
1009 int get_net_output_uris(xmlNodePtr net_output_node
, char **control_uri
,
1014 for (node
= xmlFirstElementChild(net_output_node
); node
;
1015 node
= xmlNextElementSibling(node
)) {
1016 if (!strcmp((const char *) node
->name
, config_element_control_uri
)) {
1018 *control_uri
= (char *) xmlNodeGetContent(node
);
1019 if (!*control_uri
) {
1024 *data_uri
= (char *) xmlNodeGetContent(node
);
1031 return *control_uri
|| *data_uri
? 0 : -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1035 int process_consumer_output(xmlNodePtr consumer_output_node
,
1036 struct consumer_output
*output
)
1043 for (node
= xmlFirstElementChild(consumer_output_node
); node
;
1044 node
= xmlNextElementSibling(node
)) {
1045 if (!strcmp((const char *) node
->name
, config_element_enabled
)) {
1046 xmlChar
*enabled_str
= xmlNodeGetContent(node
);
1050 ret
= -LTTNG_ERR_NOMEM
;
1054 ret
= parse_bool(enabled_str
, &output
->enabled
);
1060 xmlNodePtr output_type_node
;
1063 output_type_node
= xmlFirstElementChild(node
);
1064 if (!output_type_node
) {
1065 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1069 if (!strcmp((const char *) output_type_node
->name
,
1070 config_element_path
)) {
1072 output
->path
= (char *) xmlNodeGetContent(output_type_node
);
1073 if (!output
->path
) {
1074 ret
= -LTTNG_ERR_NOMEM
;
1079 ret
= get_net_output_uris(output_type_node
,
1080 &output
->control_uri
, &output
->data_uri
);
1092 free(output
->control_uri
);
1093 free(output
->data_uri
);
1094 memset(output
, 0, sizeof(struct consumer_output
));
1100 int create_session_net_output(const char *name
, struct lttng_domain
*domain
,
1101 const char *control_uri
, const char *data_uri
)
1104 struct lttng_handle
*handle
;
1105 const char *uri
= NULL
;
1110 handle
= lttng_create_handle(name
, domain
);
1112 ret
= -LTTNG_ERR_NOMEM
;
1116 if (!control_uri
|| !data_uri
) {
1117 uri
= control_uri
? control_uri
: data_uri
;
1122 ret
= lttng_set_consumer_url(handle
, control_uri
, data_uri
);
1123 lttng_destroy_handle(handle
);
1129 int create_snapshot_session(const char *session_name
, xmlNodePtr output_node
)
1132 xmlNodePtr node
= NULL
;
1133 xmlNodePtr snapshot_output_list_node
;
1134 xmlNodePtr snapshot_output_node
;
1136 assert(session_name
);
1138 ret
= lttng_create_session_snapshot(session_name
, NULL
);
1147 snapshot_output_list_node
= xmlFirstElementChild(output_node
);
1149 /* Parse and create snapshot outputs */
1151 for (snapshot_output_node
=
1152 xmlFirstElementChild(snapshot_output_list_node
);
1153 snapshot_output_node
; snapshot_output_node
=
1154 xmlNextElementSibling(snapshot_output_node
)) {
1156 uint64_t max_size
= UINT64_MAX
;
1157 struct consumer_output output
= { 0 };
1158 struct lttng_snapshot_output
*snapshot_output
= NULL
;
1160 for (node
= xmlFirstElementChild(snapshot_output_node
); node
;
1161 node
= xmlNextElementSibling(node
)) {
1162 if (!strcmp((const char *) node
->name
,
1163 config_element_name
)) {
1165 name
= (char *) xmlNodeGetContent(node
);
1167 ret
= -LTTNG_ERR_NOMEM
;
1168 goto error_snapshot_output
;
1170 } else if (!strcmp((const char *) node
->name
,
1171 config_element_max_size
)) {
1172 xmlChar
*content
= xmlNodeGetContent(node
);
1176 ret
= -LTTNG_ERR_NOMEM
;
1177 goto error_snapshot_output
;
1179 ret
= parse_uint(content
, &max_size
);
1182 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1183 goto error_snapshot_output
;
1186 /* consumer_output */
1187 ret
= process_consumer_output(node
, &output
);
1189 goto error_snapshot_output
;
1194 snapshot_output
= lttng_snapshot_output_create();
1195 if (!snapshot_output
) {
1196 ret
= -LTTNG_ERR_NOMEM
;
1197 goto error_snapshot_output
;
1200 ret
= lttng_snapshot_output_set_name(name
, snapshot_output
);
1202 goto error_snapshot_output
;
1205 ret
= lttng_snapshot_output_set_size(max_size
, snapshot_output
);
1207 goto error_snapshot_output
;
1211 ret
= lttng_snapshot_output_set_ctrl_url(output
.path
,
1214 goto error_snapshot_output
;
1217 if (output
.control_uri
) {
1218 ret
= lttng_snapshot_output_set_ctrl_url(output
.control_uri
,
1221 goto error_snapshot_output
;
1225 if (output
.data_uri
) {
1226 ret
= lttng_snapshot_output_set_data_url(output
.data_uri
,
1229 goto error_snapshot_output
;
1234 ret
= lttng_snapshot_add_output(session_name
, snapshot_output
);
1235 error_snapshot_output
:
1238 free(output
.control_uri
);
1239 free(output
.data_uri
);
1240 lttng_snapshot_output_destroy(snapshot_output
);
1250 int create_session(const char *name
,
1251 struct lttng_domain
*kernel_domain
,
1252 struct lttng_domain
*ust_domain
,
1253 struct lttng_domain
*jul_domain
,
1254 struct lttng_domain
*log4j_domain
,
1255 xmlNodePtr output_node
,
1256 uint64_t live_timer_interval
)
1259 struct consumer_output output
= { 0 };
1260 xmlNodePtr consumer_output_node
;
1265 consumer_output_node
= xmlFirstElementChild(output_node
);
1266 if (!consumer_output_node
) {
1267 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1271 if (strcmp((const char *) consumer_output_node
->name
,
1272 config_element_consumer_output
)) {
1273 WARN("Invalid output type, expected %s node",
1274 config_element_consumer_output
);
1275 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1279 ret
= process_consumer_output(consumer_output_node
, &output
);
1285 if (live_timer_interval
!= UINT64_MAX
&&
1286 !output
.control_uri
&& !output
.data_uri
) {
1287 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1291 if (output
.control_uri
|| output
.data_uri
) {
1293 struct lttng_domain
*domain
;
1294 struct lttng_domain
*domains
[] =
1295 { kernel_domain
, ust_domain
, jul_domain
, log4j_domain
};
1297 /* network destination */
1298 if (live_timer_interval
&& live_timer_interval
!= UINT64_MAX
) {
1300 * URLs are provided for sure since the test above make sure that
1301 * with a live timer the data and control URIs are provided. So,
1302 * NULL is passed here and will be set right after.
1304 ret
= lttng_create_session_live(name
, NULL
, live_timer_interval
);
1306 ret
= lttng_create_session(name
, NULL
);
1312 for (i
= 0; i
< (sizeof(domains
) / sizeof(domains
[0])); i
++) {
1313 domain
= domains
[i
];
1318 ret
= create_session_net_output(name
, domain
, output
.control_uri
,
1325 /* either local output or no output */
1326 ret
= lttng_create_session(name
, output
.path
);
1333 free(output
.control_uri
);
1334 free(output
.data_uri
);
1338 int process_probe_attribute_node(xmlNodePtr probe_attribute_node
,
1339 struct lttng_event_probe_attr
*attr
)
1343 assert(probe_attribute_node
);
1346 if (!strcmp((const char *) probe_attribute_node
->name
,
1347 config_element_address
)) {
1352 content
= xmlNodeGetContent(probe_attribute_node
);
1354 ret
= -LTTNG_ERR_NOMEM
;
1358 ret
= parse_uint(content
, &addr
);
1361 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1366 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1367 config_element_offset
)) {
1369 uint64_t offset
= 0;
1372 content
= xmlNodeGetContent(probe_attribute_node
);
1374 ret
= -LTTNG_ERR_NOMEM
;
1378 ret
= parse_uint(content
, &offset
);
1381 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1385 attr
->offset
= offset
;
1386 } else if (!strcmp((const char *) probe_attribute_node
->name
,
1387 config_element_symbol_name
)) {
1392 content
= xmlNodeGetContent(probe_attribute_node
);
1394 ret
= -LTTNG_ERR_NOMEM
;
1398 name_len
= strlen((char *) content
);
1399 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1400 WARN("symbol_name too long.");
1401 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1406 strncpy(attr
->symbol_name
, (const char *) content
, name_len
);
1415 int process_event_node(xmlNodePtr event_node
, struct lttng_handle
*handle
,
1416 const char *channel_name
)
1420 struct lttng_event event
;
1421 char **exclusions
= NULL
;
1422 unsigned long exclusion_count
= 0;
1423 char *filter_expression
= NULL
;
1427 assert(channel_name
);
1429 memset(&event
, 0, sizeof(event
));
1431 /* Initialize default log level which varies by domain */
1432 switch (handle
->domain
.type
)
1434 case LTTNG_DOMAIN_JUL
:
1435 event
.loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
1437 case LTTNG_DOMAIN_LOG4J
:
1438 event
.loglevel
= LTTNG_LOGLEVEL_LOG4J_ALL
;
1440 case LTTNG_DOMAIN_PYTHON
:
1441 event
.loglevel
= LTTNG_LOGLEVEL_PYTHON_DEBUG
;
1443 case LTTNG_DOMAIN_UST
:
1444 case LTTNG_DOMAIN_KERNEL
:
1445 event
.loglevel
= LTTNG_LOGLEVEL_DEBUG
;
1451 for (node
= xmlFirstElementChild(event_node
); node
;
1452 node
= xmlNextElementSibling(node
)) {
1453 if (!strcmp((const char *) node
->name
, config_element_name
)) {
1458 content
= xmlNodeGetContent(node
);
1460 ret
= -LTTNG_ERR_NOMEM
;
1464 name_len
= strlen((char *) content
);
1465 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1466 WARN("Channel name too long.");
1467 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1472 strncpy(event
.name
, (const char *) content
, name_len
);
1474 } else if (!strcmp((const char *) node
->name
,
1475 config_element_enabled
)) {
1476 xmlChar
*content
= xmlNodeGetContent(node
);
1480 ret
= -LTTNG_ERR_NOMEM
;
1484 ret
= parse_bool(content
, &event
.enabled
);
1487 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1490 } else if (!strcmp((const char *) node
->name
,
1491 config_element_type
)) {
1492 xmlChar
*content
= xmlNodeGetContent(node
);
1496 ret
= -LTTNG_ERR_NOMEM
;
1500 ret
= get_event_type(content
);
1503 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1508 } else if (!strcmp((const char *) node
->name
,
1509 config_element_loglevel_type
)) {
1510 xmlChar
*content
= xmlNodeGetContent(node
);
1514 ret
= -LTTNG_ERR_NOMEM
;
1518 ret
= get_loglevel_type(content
);
1521 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1525 event
.loglevel_type
= ret
;
1526 } else if (!strcmp((const char *) node
->name
,
1527 config_element_loglevel
)) {
1529 int64_t loglevel
= 0;
1532 content
= xmlNodeGetContent(node
);
1534 ret
= -LTTNG_ERR_NOMEM
;
1538 ret
= parse_int(content
, &loglevel
);
1541 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1545 if (loglevel
> INT_MAX
|| loglevel
< INT_MIN
) {
1546 WARN("loglevel out of range.");
1547 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1551 event
.loglevel
= loglevel
;
1552 } else if (!strcmp((const char *) node
->name
,
1553 config_element_filter
)) {
1555 xmlNodeGetContent(node
);
1559 ret
= -LTTNG_ERR_NOMEM
;
1563 free(filter_expression
);
1564 filter_expression
= strdup((char *) content
);
1566 if (!filter_expression
) {
1567 ret
= -LTTNG_ERR_NOMEM
;
1570 } else if (!strcmp((const char *) node
->name
,
1571 config_element_exclusions
)) {
1572 xmlNodePtr exclusion_node
;
1573 int exclusion_index
= 0;
1578 * Exclusions has already been initialized,
1581 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1585 exclusion_count
= xmlChildElementCount(node
);
1586 if (!exclusion_count
) {
1590 exclusions
= zmalloc(exclusion_count
* sizeof(char *));
1592 exclusion_count
= 0;
1593 ret
= -LTTNG_ERR_NOMEM
;
1597 for (exclusion_node
= xmlFirstElementChild(node
); exclusion_node
;
1598 exclusion_node
= xmlNextElementSibling(exclusion_node
)) {
1600 xmlNodeGetContent(exclusion_node
);
1603 ret
= -LTTNG_ERR_NOMEM
;
1607 exclusions
[exclusion_index
] = strdup((const char *) content
);
1609 if (!exclusions
[exclusion_index
]) {
1610 ret
= -LTTNG_ERR_NOMEM
;
1616 event
.exclusion
= 1;
1617 } else if (!strcmp((const char *) node
->name
,
1618 config_element_attributes
)) {
1619 xmlNodePtr attribute_node
= xmlFirstElementChild(node
);
1622 if (!attribute_node
) {
1623 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1627 if (!strcmp((const char *) node
->name
,
1628 config_element_probe_attributes
)) {
1629 xmlNodePtr probe_attribute_node
;
1631 /* probe_attributes */
1632 for (probe_attribute_node
=
1633 xmlFirstElementChild(attribute_node
); probe_attribute_node
;
1634 probe_attribute_node
= xmlNextElementSibling(
1635 probe_attribute_node
)) {
1637 ret
= process_probe_attribute_node(probe_attribute_node
,
1646 xmlNodePtr symbol_node
= xmlFirstElementChild(attribute_node
);
1648 /* function_attributes */
1649 content
= xmlNodeGetContent(symbol_node
);
1651 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1655 sym_len
= strlen((char *) content
);
1656 if (sym_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1657 WARN("Function name too long.");
1658 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1663 strncpy(event
.attr
.ftrace
.symbol_name
, (char *) content
,
1670 ret
= lttng_enable_event_with_exclusions(handle
, &event
, channel_name
,
1671 filter_expression
, exclusion_count
, exclusions
);
1676 if (!event
.enabled
) {
1678 * Note that we should use lttng_disable_event_ext() (2.6+) to
1679 * eliminate the risk of clashing on events of the same
1680 * name (with different event types and loglevels).
1682 * Unfortunately, lttng_disable_event_ext() only performs a
1683 * match on the name and event type and errors out if any other
1684 * event attribute is not set to its default value.
1686 * This will disable all events that match this name.
1688 ret
= lttng_disable_event(handle
, event
.name
, channel_name
);
1691 for (i
= 0; i
< exclusion_count
; i
++) {
1692 free(exclusions
[i
]);
1696 free(filter_expression
);
1701 int process_events_node(xmlNodePtr events_node
, struct lttng_handle
*handle
,
1702 const char *channel_name
)
1707 assert(events_node
);
1709 assert(channel_name
);
1711 for (node
= xmlFirstElementChild(events_node
); node
;
1712 node
= xmlNextElementSibling(node
)) {
1713 ret
= process_event_node(node
, handle
, channel_name
);
1723 int process_channel_attr_node(xmlNodePtr attr_node
,
1724 struct lttng_channel
*channel
, xmlNodePtr
*contexts_node
,
1725 xmlNodePtr
*events_node
)
1731 assert(contexts_node
);
1732 assert(events_node
);
1734 if (!strcmp((const char *) attr_node
->name
, config_element_name
)) {
1739 content
= xmlNodeGetContent(attr_node
);
1741 ret
= -LTTNG_ERR_NOMEM
;
1745 name_len
= strlen((char *) content
);
1746 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
1747 WARN("Channel name too long.");
1748 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1753 strncpy(channel
->name
, (const char *) content
, name_len
);
1755 } else if (!strcmp((const char *) attr_node
->name
,
1756 config_element_enabled
)) {
1761 content
= xmlNodeGetContent(attr_node
);
1763 ret
= -LTTNG_ERR_NOMEM
;
1767 ret
= parse_bool(content
, &enabled
);
1770 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1774 channel
->enabled
= enabled
;
1775 } else if (!strcmp((const char *) attr_node
->name
,
1776 config_element_overwrite_mode
)) {
1779 /* overwrite_mode */
1780 content
= xmlNodeGetContent(attr_node
);
1782 ret
= -LTTNG_ERR_NOMEM
;
1786 ret
= get_overwrite_mode(content
);
1789 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1793 channel
->attr
.overwrite
= ret
;
1794 } else if (!strcmp((const char *) attr_node
->name
,
1795 config_element_subbuf_size
)) {
1798 /* subbuffer_size */
1799 content
= xmlNodeGetContent(attr_node
);
1801 ret
= -LTTNG_ERR_NOMEM
;
1805 ret
= parse_uint(content
, &channel
->attr
.subbuf_size
);
1808 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1811 } else if (!strcmp((const char *) attr_node
->name
,
1812 config_element_num_subbuf
)) {
1815 /* subbuffer_count */
1816 content
= xmlNodeGetContent(attr_node
);
1818 ret
= -LTTNG_ERR_NOMEM
;
1822 ret
= parse_uint(content
, &channel
->attr
.num_subbuf
);
1825 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1828 } else if (!strcmp((const char *) attr_node
->name
,
1829 config_element_switch_timer_interval
)) {
1831 uint64_t switch_timer_interval
= 0;
1833 /* switch_timer_interval */
1834 content
= xmlNodeGetContent(attr_node
);
1836 ret
= -LTTNG_ERR_NOMEM
;
1840 ret
= parse_uint(content
, &switch_timer_interval
);
1843 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1847 if (switch_timer_interval
> UINT_MAX
) {
1848 WARN("switch_timer_interval out of range.");
1849 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1853 channel
->attr
.switch_timer_interval
=
1854 switch_timer_interval
;
1855 } else if (!strcmp((const char *) attr_node
->name
,
1856 config_element_read_timer_interval
)) {
1858 uint64_t read_timer_interval
= 0;
1860 /* read_timer_interval */
1861 content
= xmlNodeGetContent(attr_node
);
1863 ret
= -LTTNG_ERR_NOMEM
;
1867 ret
= parse_uint(content
, &read_timer_interval
);
1870 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1874 if (read_timer_interval
> UINT_MAX
) {
1875 WARN("read_timer_interval out of range.");
1876 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1880 channel
->attr
.read_timer_interval
=
1881 read_timer_interval
;
1882 } else if (!strcmp((const char *) attr_node
->name
,
1883 config_element_output_type
)) {
1887 content
= xmlNodeGetContent(attr_node
);
1889 ret
= -LTTNG_ERR_NOMEM
;
1893 ret
= get_output_type(content
);
1896 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1900 channel
->attr
.output
= ret
;
1901 } else if (!strcmp((const char *) attr_node
->name
,
1902 config_element_tracefile_size
)) {
1905 /* tracefile_size */
1906 content
= xmlNodeGetContent(attr_node
);
1908 ret
= -LTTNG_ERR_NOMEM
;
1912 ret
= parse_uint(content
, &channel
->attr
.tracefile_size
);
1915 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1918 } else if (!strcmp((const char *) attr_node
->name
,
1919 config_element_tracefile_count
)) {
1922 /* tracefile_count */
1923 content
= xmlNodeGetContent(attr_node
);
1925 ret
= -LTTNG_ERR_NOMEM
;
1929 ret
= parse_uint(content
, &channel
->attr
.tracefile_count
);
1932 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1935 } else if (!strcmp((const char *) attr_node
->name
,
1936 config_element_live_timer_interval
)) {
1938 uint64_t live_timer_interval
= 0;
1940 /* live_timer_interval */
1941 content
= xmlNodeGetContent(attr_node
);
1943 ret
= -LTTNG_ERR_NOMEM
;
1947 ret
= parse_uint(content
, &live_timer_interval
);
1950 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1954 if (live_timer_interval
> UINT_MAX
) {
1955 WARN("live_timer_interval out of range.");
1956 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1960 channel
->attr
.live_timer_interval
=
1961 live_timer_interval
;
1962 } else if (!strcmp((const char *) attr_node
->name
,
1963 config_element_events
)) {
1965 *events_node
= attr_node
;
1968 *contexts_node
= attr_node
;
1976 int process_context_node(xmlNodePtr context_node
,
1977 struct lttng_handle
*handle
, const char *channel_name
)
1980 struct lttng_event_context context
;
1981 xmlNodePtr context_child_node
= xmlFirstElementChild(context_node
);
1984 assert(channel_name
);
1986 if (!context_child_node
) {
1987 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
1991 memset(&context
, 0, sizeof(context
));
1993 if (!strcmp((const char *) context_child_node
->name
,
1994 config_element_type
)) {
1996 xmlChar
*content
= xmlNodeGetContent(context_child_node
);
1998 ret
= -LTTNG_ERR_NOMEM
;
2002 ret
= get_context_type(content
);
2005 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2011 xmlNodePtr perf_attr_node
;
2014 context
.ctx
= handle
->domain
.type
== LTTNG_DOMAIN_KERNEL
?
2015 LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER
:
2016 LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER
;
2017 for (perf_attr_node
= xmlFirstElementChild(context_child_node
);
2018 perf_attr_node
; perf_attr_node
=
2019 xmlNextElementSibling(perf_attr_node
)) {
2020 if (!strcmp((const char *) perf_attr_node
->name
,
2021 config_element_type
)) {
2026 content
= xmlNodeGetContent(perf_attr_node
);
2028 ret
= -LTTNG_ERR_NOMEM
;
2032 ret
= parse_uint(content
, &type
);
2035 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2039 if (type
> UINT32_MAX
) {
2040 WARN("perf context type out of range.");
2041 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2045 context
.u
.perf_counter
.type
= type
;
2046 } else if (!strcmp((const char *) perf_attr_node
->name
,
2047 config_element_config
)) {
2049 uint64_t config
= 0;
2052 content
= xmlNodeGetContent(perf_attr_node
);
2054 ret
= -LTTNG_ERR_NOMEM
;
2058 ret
= parse_uint(content
, &config
);
2061 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2065 context
.u
.perf_counter
.config
= config
;
2066 } else if (!strcmp((const char *) perf_attr_node
->name
,
2067 config_element_name
)) {
2072 content
= xmlNodeGetContent(perf_attr_node
);
2074 ret
= -LTTNG_ERR_NOMEM
;
2078 name_len
= strlen((char *) content
);
2079 if (name_len
>= LTTNG_SYMBOL_NAME_LEN
) {
2080 WARN("perf context name too long.");
2081 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2086 strncpy(context
.u
.perf_counter
.name
, (const char *) content
,
2093 ret
= lttng_add_context(handle
, &context
, NULL
, channel_name
);
2099 int process_contexts_node(xmlNodePtr contexts_node
,
2100 struct lttng_handle
*handle
, const char *channel_name
)
2103 xmlNodePtr context_node
;
2105 for (context_node
= xmlFirstElementChild(contexts_node
); context_node
;
2106 context_node
= xmlNextElementSibling(context_node
)) {
2107 ret
= process_context_node(context_node
, handle
, channel_name
);
2117 int process_pid_tracker_node(xmlNodePtr pid_tracker_node
,
2118 struct lttng_handle
*handle
)
2121 xmlNodePtr targets_node
= NULL
;
2125 assert(pid_tracker_node
);
2126 /* get the targets node */
2127 for (node
= xmlFirstElementChild(pid_tracker_node
); node
;
2128 node
= xmlNextElementSibling(node
)) {
2129 if (!strcmp((const char *) node
->name
,
2130 config_element_targets
)) {
2131 targets_node
= node
;
2136 if (!targets_node
) {
2137 ret
= LTTNG_ERR_INVALID
;
2141 /* Go through all pid_target node */
2142 child
= xmlChildElementCount(targets_node
);
2144 /* The session is explicitly set to target nothing. */
2145 ret
= lttng_untrack_pid(handle
, -1);
2150 for (node
= xmlFirstElementChild(targets_node
); node
;
2151 node
= xmlNextElementSibling(node
)) {
2152 xmlNodePtr pid_target_node
= node
;
2154 /* get pid node and track it */
2155 for (node
= xmlFirstElementChild(pid_target_node
); node
;
2156 node
= xmlNextElementSibling(node
)) {
2157 if (!strcmp((const char *) node
->name
,
2158 config_element_pid
)) {
2160 xmlChar
*content
= NULL
;
2162 content
= xmlNodeGetContent(node
);
2164 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2168 ret
= parse_int(content
, &pid
);
2171 ret
= LTTNG_ERR_LOAD_INVALID_CONFIG
;
2175 ret
= lttng_track_pid(handle
, (int) pid
);
2181 node
= pid_target_node
;
2190 int process_domain_node(xmlNodePtr domain_node
, const char *session_name
)
2193 struct lttng_domain domain
= { 0 };
2194 struct lttng_handle
*handle
= NULL
;
2195 xmlNodePtr channels_node
= NULL
;
2196 xmlNodePtr trackers_node
= NULL
;
2197 xmlNodePtr pid_tracker_node
= NULL
;
2200 assert(session_name
);
2202 ret
= init_domain(domain_node
, &domain
);
2207 handle
= lttng_create_handle(session_name
, &domain
);
2209 ret
= -LTTNG_ERR_NOMEM
;
2213 /* get the channels node */
2214 for (node
= xmlFirstElementChild(domain_node
); node
;
2215 node
= xmlNextElementSibling(node
)) {
2216 if (!strcmp((const char *) node
->name
,
2217 config_element_channels
)) {
2218 channels_node
= node
;
2223 if (!channels_node
) {
2227 /* create all channels */
2228 for (node
= xmlFirstElementChild(channels_node
); node
;
2229 node
= xmlNextElementSibling(node
)) {
2230 struct lttng_channel channel
;
2231 xmlNodePtr contexts_node
= NULL
;
2232 xmlNodePtr events_node
= NULL
;
2233 xmlNodePtr channel_attr_node
;
2235 memset(&channel
, 0, sizeof(channel
));
2236 lttng_channel_set_default_attr(&domain
, &channel
.attr
);
2238 for (channel_attr_node
= xmlFirstElementChild(node
);
2239 channel_attr_node
; channel_attr_node
=
2240 xmlNextElementSibling(channel_attr_node
)) {
2241 ret
= process_channel_attr_node(channel_attr_node
,
2242 &channel
, &contexts_node
, &events_node
);
2248 ret
= lttng_enable_channel(handle
, &channel
);
2253 ret
= process_events_node(events_node
, handle
, channel
.name
);
2258 ret
= process_contexts_node(contexts_node
, handle
,
2265 /* get the trackers node */
2266 for (node
= xmlFirstElementChild(domain_node
); node
;
2267 node
= xmlNextElementSibling(node
)) {
2268 if (!strcmp((const char *) node
->name
,
2269 config_element_trackers
)) {
2270 trackers_node
= node
;
2275 if (!trackers_node
) {
2279 for (node
= xmlFirstElementChild(trackers_node
); node
;
2280 node
= xmlNextElementSibling(node
)) {
2281 if (!strcmp((const char *)node
->name
,config_element_pid_tracker
)) {
2282 pid_tracker_node
= node
;
2283 ret
= process_pid_tracker_node(pid_tracker_node
, handle
);
2290 if (!pid_tracker_node
) {
2291 lttng_track_pid(handle
, -1);
2295 lttng_destroy_handle(handle
);
2300 int process_session_node(xmlNodePtr session_node
, const char *session_name
,
2303 int ret
, started
= -1, snapshot_mode
= -1;
2304 uint64_t live_timer_interval
= UINT64_MAX
;
2305 xmlChar
*name
= NULL
;
2306 xmlChar
*shm_path
= NULL
;
2307 xmlNodePtr domains_node
= NULL
;
2308 xmlNodePtr output_node
= NULL
;
2310 struct lttng_domain
*kernel_domain
= NULL
;
2311 struct lttng_domain
*ust_domain
= NULL
;
2312 struct lttng_domain
*jul_domain
= NULL
;
2313 struct lttng_domain
*log4j_domain
= NULL
;
2314 struct lttng_domain
*python_domain
= NULL
;
2316 for (node
= xmlFirstElementChild(session_node
); node
;
2317 node
= xmlNextElementSibling(node
)) {
2318 if (!name
&& !strcmp((const char *) node
->name
,
2319 config_element_name
)) {
2321 xmlChar
*node_content
= xmlNodeGetContent(node
);
2322 if (!node_content
) {
2323 ret
= -LTTNG_ERR_NOMEM
;
2327 name
= node_content
;
2328 } else if (!domains_node
&& !strcmp((const char *) node
->name
,
2329 config_element_domains
)) {
2331 domains_node
= node
;
2332 } else if (started
== -1 && !strcmp((const char *) node
->name
,
2333 config_element_started
)) {
2335 xmlChar
*node_content
= xmlNodeGetContent(node
);
2336 if (!node_content
) {
2337 ret
= -LTTNG_ERR_NOMEM
;
2341 ret
= parse_bool(node_content
, &started
);
2344 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2347 } else if (!output_node
&& !strcmp((const char *) node
->name
,
2348 config_element_output
)) {
2351 } else if (!shm_path
&& !strcmp((const char *) node
->name
,
2352 config_element_shared_memory_path
)) {
2353 /* shared memory path */
2354 xmlChar
*node_content
= xmlNodeGetContent(node
);
2355 if (!node_content
) {
2356 ret
= -LTTNG_ERR_NOMEM
;
2360 shm_path
= node_content
;
2362 /* attributes, snapshot_mode or live_timer_interval */
2363 xmlNodePtr attributes_child
=
2364 xmlFirstElementChild(node
);
2366 if (!strcmp((const char *) attributes_child
->name
,
2367 config_element_snapshot_mode
)) {
2369 xmlChar
*snapshot_mode_content
=
2370 xmlNodeGetContent(attributes_child
);
2371 if (!snapshot_mode_content
) {
2372 ret
= -LTTNG_ERR_NOMEM
;
2376 ret
= parse_bool(snapshot_mode_content
, &snapshot_mode
);
2377 free(snapshot_mode_content
);
2379 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2383 /* live_timer_interval */
2384 xmlChar
*timer_interval_content
=
2385 xmlNodeGetContent(attributes_child
);
2386 if (!timer_interval_content
) {
2387 ret
= -LTTNG_ERR_NOMEM
;
2391 ret
= parse_uint(timer_interval_content
, &live_timer_interval
);
2392 free(timer_interval_content
);
2394 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2402 /* Mandatory attribute, as defined in the session XSD */
2403 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2407 if (session_name
&& strcmp((char *) name
, session_name
)) {
2408 /* This is not the session we are looking for */
2409 ret
= -LTTNG_ERR_NO_SESSION
;
2413 /* Init domains to create the session handles */
2414 for (node
= xmlFirstElementChild(domains_node
); node
;
2415 node
= xmlNextElementSibling(node
)) {
2416 struct lttng_domain
*domain
;
2418 domain
= zmalloc(sizeof(*domain
));
2420 ret
= -LTTNG_ERR_NOMEM
;
2424 ret
= init_domain(node
, domain
);
2426 goto domain_init_error
;
2429 switch (domain
->type
) {
2430 case LTTNG_DOMAIN_KERNEL
:
2431 if (kernel_domain
) {
2432 /* Same domain seen twice, invalid! */
2433 goto domain_init_error
;
2435 kernel_domain
= domain
;
2437 case LTTNG_DOMAIN_UST
:
2439 /* Same domain seen twice, invalid! */
2440 goto domain_init_error
;
2442 ust_domain
= domain
;
2444 case LTTNG_DOMAIN_JUL
:
2446 /* Same domain seen twice, invalid! */
2447 goto domain_init_error
;
2449 jul_domain
= domain
;
2451 case LTTNG_DOMAIN_LOG4J
:
2453 /* Same domain seen twice, invalid! */
2454 goto domain_init_error
;
2456 log4j_domain
= domain
;
2458 case LTTNG_DOMAIN_PYTHON
:
2459 if (python_domain
) {
2460 /* Same domain seen twice, invalid! */
2461 goto domain_init_error
;
2463 python_domain
= domain
;
2466 WARN("Invalid domain type");
2467 goto domain_init_error
;
2472 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2477 /* Destroy session if it exists */
2478 ret
= lttng_destroy_session((const char *) name
);
2479 if (ret
&& ret
!= -LTTNG_ERR_SESS_NOT_FOUND
) {
2480 ERR("Failed to destroy existing session.");
2485 /* Create session type depending on output type */
2486 if (snapshot_mode
&& snapshot_mode
!= -1) {
2487 ret
= create_snapshot_session((const char *) name
, output_node
);
2488 } else if (live_timer_interval
&&
2489 live_timer_interval
!= UINT64_MAX
) {
2490 ret
= create_session((const char *) name
, kernel_domain
,
2491 ust_domain
, jul_domain
, log4j_domain
,
2492 output_node
, live_timer_interval
);
2494 /* regular session */
2495 ret
= create_session((const char *) name
, kernel_domain
,
2496 ust_domain
, jul_domain
, log4j_domain
,
2497 output_node
, UINT64_MAX
);
2504 ret
= lttng_set_session_shm_path((const char *) name
,
2505 (const char *) shm_path
);
2511 for (node
= xmlFirstElementChild(domains_node
); node
;
2512 node
= xmlNextElementSibling(node
)) {
2513 ret
= process_domain_node(node
, (const char *) name
);
2520 ret
= lttng_start_tracing((const char *) name
);
2528 ERR("Failed to load session %s: %s", (const char *) name
,
2529 lttng_strerror(ret
));
2530 lttng_destroy_session((const char *) name
);
2534 free(kernel_domain
);
2538 free(python_domain
);
2545 * Return 1 if the given path is readable by the current UID or 0 if not.
2546 * Return -1 if the path is EPERM.
2548 static int validate_file_read_creds(const char *path
)
2554 /* Can we read the file. */
2555 ret
= access(path
, R_OK
);
2559 if (errno
== EACCES
) {
2570 int load_session_from_file(const char *path
, const char *session_name
,
2571 struct session_config_validation_ctx
*validation_ctx
, int override
)
2573 int ret
, session_found
= !session_name
;
2574 xmlDocPtr doc
= NULL
;
2575 xmlNodePtr sessions_node
;
2576 xmlNodePtr session_node
;
2579 assert(validation_ctx
);
2581 ret
= validate_file_read_creds(path
);
2584 ret
= -LTTNG_ERR_EPERM
;
2586 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2591 doc
= xmlParseFile(path
);
2593 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2597 ret
= xmlSchemaValidateDoc(validation_ctx
->schema_validation_ctx
, doc
);
2599 ERR("Session configuration file validation failed");
2600 ret
= -LTTNG_ERR_LOAD_INVALID_CONFIG
;
2604 sessions_node
= xmlDocGetRootElement(doc
);
2605 if (!sessions_node
) {
2609 for (session_node
= xmlFirstElementChild(sessions_node
);
2610 session_node
; session_node
=
2611 xmlNextElementSibling(session_node
)) {
2612 ret
= process_session_node(session_node
,
2613 session_name
, override
);
2614 if (session_name
&& ret
== 0) {
2615 /* Target session found and loaded */
2623 ret
= session_found
? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT
;
2628 /* Allocate dirent as recommended by READDIR(3), NOTES on readdir_r */
2630 struct dirent
*alloc_dirent(const char *path
)
2634 struct dirent
*entry
;
2636 name_max
= pathconf(path
, _PC_NAME_MAX
);
2637 if (name_max
== -1) {
2638 name_max
= PATH_MAX
;
2640 len
= offsetof(struct dirent
, d_name
) + name_max
+ 1;
2641 entry
= zmalloc(len
);
2646 int load_session_from_path(const char *path
, const char *session_name
,
2647 struct session_config_validation_ctx
*validation_ctx
, int override
)
2649 int ret
, session_found
= !session_name
;
2650 DIR *directory
= NULL
;
2653 assert(validation_ctx
);
2655 directory
= opendir(path
);
2659 /* Try the file loading. */
2662 ret
= -LTTNG_ERR_LOAD_SESSION_NOENT
;
2665 ret
= -LTTNG_ERR_LOAD_IO_FAIL
;
2670 struct dirent
*entry
;
2671 struct dirent
*result
;
2672 char *file_path
= NULL
;
2673 size_t path_len
= strlen(path
);
2675 if (path_len
>= PATH_MAX
) {
2676 ret
= -LTTNG_ERR_INVALID
;
2680 entry
= alloc_dirent(path
);
2682 ret
= -LTTNG_ERR_NOMEM
;
2686 file_path
= zmalloc(PATH_MAX
);
2688 ret
= -LTTNG_ERR_NOMEM
;
2693 strncpy(file_path
, path
, path_len
);
2694 if (file_path
[path_len
- 1] != '/') {
2695 file_path
[path_len
++] = '/';
2699 /* Search for *.lttng files */
2700 while (!readdir_r(directory
, entry
, &result
) && result
) {
2701 size_t file_name_len
= strlen(result
->d_name
);
2703 if (file_name_len
<=
2704 sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
)) {
2708 if (path_len
+ file_name_len
>= PATH_MAX
) {
2712 if (strcmp(DEFAULT_SESSION_CONFIG_FILE_EXTENSION
,
2713 result
->d_name
+ file_name_len
- sizeof(
2714 DEFAULT_SESSION_CONFIG_FILE_EXTENSION
) + 1)) {
2718 strncpy(file_path
+ path_len
, result
->d_name
, file_name_len
);
2719 file_path
[path_len
+ file_name_len
] = '\0';
2721 ret
= load_session_from_file(file_path
, session_name
,
2722 validation_ctx
, override
);
2723 if (session_name
&& !ret
) {
2732 ret
= load_session_from_file(path
, session_name
,
2733 validation_ctx
, override
);
2743 if (closedir(directory
)) {
2748 if (session_found
) {
2756 * Validate that the given path's credentials and the current process have the
2757 * same UID. If so, return 1 else return 0 if it does NOT match.
2759 static int validate_path_creds(const char *path
)
2761 int ret
, uid
= getuid();
2770 ret
= stat(path
, &buf
);
2772 if (errno
!= ENOENT
) {
2775 ret
= -LTTNG_ERR_INVALID
;
2779 if (buf
.st_uid
!= uid
) {
2790 int config_load_session(const char *path
, const char *session_name
,
2791 int override
, unsigned int autoload
)
2794 bool session_loaded
= false;
2795 const char *path_ptr
= NULL
;
2796 struct session_config_validation_ctx validation_ctx
= { 0 };
2798 ret
= init_session_config_validation_ctx(&validation_ctx
);
2805 const char *sys_path
;
2808 home_path
= utils_get_home_dir();
2810 char path
[PATH_MAX
];
2813 * Try user session configuration path. Ignore error here so we can
2814 * continue loading the system wide sessions.
2817 ret
= snprintf(path
, sizeof(path
),
2818 DEFAULT_SESSION_HOME_CONFIGPATH
"/"
2819 DEFAULT_SESSION_CONFIG_AUTOLOAD
, home_path
);
2821 PERROR("snprintf session autoload home config path");
2826 * Credentials are only validated for the autoload in order to
2827 * avoid any user session daemon to try to load kernel sessions
2828 * automatically and failing all the times.
2830 ret
= validate_path_creds(path
);
2835 ret
= snprintf(path
, sizeof(path
),
2836 DEFAULT_SESSION_HOME_CONFIGPATH
, home_path
);
2838 PERROR("snprintf session home config path");
2844 ret
= load_session_from_path(path_ptr
, session_name
,
2845 &validation_ctx
, override
);
2846 if (ret
&& ret
!= -LTTNG_ERR_LOAD_SESSION_NOENT
) {
2850 * Continue even if the session was found since we have to try
2851 * the system wide sessions.
2853 session_loaded
= true;
2857 /* Reset path pointer for the system wide dir. */
2860 /* Try system wide configuration directory. */
2862 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
"/"
2863 DEFAULT_SESSION_CONFIG_AUTOLOAD
;
2864 ret
= validate_path_creds(sys_path
);
2866 path_ptr
= sys_path
;
2869 sys_path
= DEFAULT_SESSION_SYSTEM_CONFIGPATH
;
2870 path_ptr
= sys_path
;
2874 ret
= load_session_from_path(path_ptr
, session_name
,
2875 &validation_ctx
, override
);
2877 session_loaded
= true;
2881 ret
= access(path
, F_OK
);
2886 ret
= -LTTNG_ERR_INVALID
;
2887 WARN("Session configuration path does not exist.");
2890 ret
= -LTTNG_ERR_EPERM
;
2893 ret
= -LTTNG_ERR_UNK
;
2899 ret
= load_session_from_path(path
, session_name
,
2900 &validation_ctx
, override
);
2903 fini_session_config_validation_ctx(&validation_ctx
);
2904 if (ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
&& !session_name
&& !path
) {
2906 * Don't report an error if no sessions are found when called
2907 * without a session_name or a search path.
2912 if (session_loaded
&& ret
== -LTTNG_ERR_LOAD_SESSION_NOENT
) {
2913 /* A matching session was found in one of the search paths. */